diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/53c7xx.c | 6102 | ||||
| -rw-r--r-- | drivers/scsi/53c7xx.h | 1608 | ||||
| -rw-r--r-- | drivers/scsi/53c7xx.scr | 1591 | ||||
| -rw-r--r-- | drivers/scsi/53c7xx_d.h_shipped | 2874 | ||||
| -rw-r--r-- | drivers/scsi/53c7xx_u.h_shipped | 102 | ||||
| -rw-r--r-- | drivers/scsi/Makefile | 12 | ||||
| -rw-r--r-- | drivers/scsi/amiga7xx.c | 138 | ||||
| -rw-r--r-- | drivers/scsi/amiga7xx.h | 23 | ||||
| -rw-r--r-- | drivers/scsi/bvme6000.c | 76 | ||||
| -rw-r--r-- | drivers/scsi/bvme6000.h | 24 | ||||
| -rw-r--r-- | drivers/scsi/mvme16x.c | 78 | ||||
| -rw-r--r-- | drivers/scsi/mvme16x.h | 24 |
12 files changed, 1 insertions, 12651 deletions
diff --git a/drivers/scsi/53c7xx.c b/drivers/scsi/53c7xx.c deleted file mode 100644 index 93b41f45638..00000000000 --- a/drivers/scsi/53c7xx.c +++ /dev/null @@ -1,6102 +0,0 @@ -/* - * 53c710 driver. Modified from Drew Eckhardts driver - * for 53c810 by Richard Hirst [richard@sleepie.demon.co.uk] - * Check out PERM_OPTIONS and EXPECTED_CLOCK, which may be defined in the - * relevant machine specific file (eg. mvme16x.[ch], amiga7xx.[ch]). - * There are also currently some defines at the top of 53c7xx.scr. - * The chip type is #defined in script_asm.pl, as well as the Makefile. - * Host scsi ID expected to be 7 - see NCR53c7x0_init(). - * - * I have removed the PCI code and some of the 53c8xx specific code - - * simply to make this file smaller and easier to manage. - * - * MVME16x issues: - * Problems trying to read any chip registers in NCR53c7x0_init(), as they - * may never have been set by 16xBug (eg. If kernel has come in over tftp). - */ - -/* - * Adapted for Linux/m68k Amiga platforms for the A4000T/A4091 and - * WarpEngine SCSI controllers. - * By Alan Hourihane <alanh@fairlite.demon.co.uk> - * Thanks to Richard Hirst for making it possible with the MVME additions - */ - -/* - * 53c710 rev 0 doesn't support add with carry. Rev 1 and 2 does. To - * overcome this problem you can define FORCE_DSA_ALIGNMENT, which ensures - * that the DSA address is always xxxxxx00. If disconnection is not allowed, - * then the script only ever tries to add small (< 256) positive offsets to - * DSA, so lack of carry isn't a problem. FORCE_DSA_ALIGNMENT can, of course, - * be defined for all chip revisions at a small cost in memory usage. - */ - -#define FORCE_DSA_ALIGNMENT - -/* - * Selection timer does not always work on the 53c710, depending on the - * timing at the last disconnect, if this is a problem for you, try - * using validids as detailed below. - * - * Options for the NCR7xx driver - * - * noasync:0 - disables sync and asynchronous negotiation - * nosync:0 - disables synchronous negotiation (does async) - * nodisconnect:0 - disables disconnection - * validids:0x?? - Bitmask field that disallows certain ID's. - * - e.g. 0x03 allows ID 0,1 - * - 0x1F allows ID 0,1,2,3,4 - * opthi:n - replace top word of options with 'n' - * optlo:n - replace bottom word of options with 'n' - * - ALWAYS SPECIFY opthi THEN optlo <<<<<<<<<< - */ - -/* - * PERM_OPTIONS are driver options which will be enabled for all NCR boards - * in the system at driver initialization time. - * - * Don't THINK about touching these in PERM_OPTIONS : - * OPTION_MEMORY_MAPPED - * 680x0 doesn't have an IO map! - * - * OPTION_DEBUG_TEST1 - * Test 1 does bus mastering and interrupt tests, which will help weed - * out brain damaged main boards. - * - * Other PERM_OPTIONS settings are listed below. Note the actual options - * required are set in the relevant file (mvme16x.c, amiga7xx.c, etc): - * - * OPTION_NO_ASYNC - * Don't negotiate for asynchronous transfers on the first command - * when OPTION_ALWAYS_SYNCHRONOUS is set. Useful for dain bramaged - * devices which do something bad rather than sending a MESSAGE - * REJECT back to us like they should if they can't cope. - * - * OPTION_SYNCHRONOUS - * Enable support for synchronous transfers. Target negotiated - * synchronous transfers will be responded to. To initiate - * a synchronous transfer request, call - * - * request_synchronous (hostno, target) - * - * from within KGDB. - * - * OPTION_ALWAYS_SYNCHRONOUS - * Negotiate for synchronous transfers with every target after - * driver initialization or a SCSI bus reset. This is a bit dangerous, - * since there are some dain bramaged SCSI devices which will accept - * SDTR messages but keep talking asynchronously. - * - * OPTION_DISCONNECT - * Enable support for disconnect/reconnect. To change the - * default setting on a given host adapter, call - * - * request_disconnect (hostno, allow) - * - * where allow is non-zero to allow, 0 to disallow. - * - * If you really want to run 10MHz FAST SCSI-II transfers, you should - * know that the NCR driver currently ignores parity information. Most - * systems do 5MHz SCSI fine. I've seen a lot that have problems faster - * than 8MHz. To play it safe, we only request 5MHz transfers. - * - * If you'd rather get 10MHz transfers, edit sdtr_message and change - * the fourth byte from 50 to 25. - */ - -/* - * Sponsored by - * iX Multiuser Multitasking Magazine - * Hannover, Germany - * hm@ix.de - * - * Copyright 1993, 1994, 1995 Drew Eckhardt - * Visionary Computing - * (Unix and Linux consulting and custom programming) - * drew@PoohSticks.ORG - * +1 (303) 786-7975 - * - * TolerANT and SCSI SCRIPTS are registered trademarks of NCR Corporation. - * - * For more information, please consult - * - * NCR53C810 - * SCSI I/O Processor - * Programmer's Guide - * - * NCR 53C810 - * PCI-SCSI I/O Processor - * Data Manual - * - * NCR 53C810/53C820 - * PCI-SCSI I/O Processor Design In Guide - * - * For literature on Symbios Logic Inc. formerly NCR, SCSI, - * and Communication products please call (800) 334-5454 or - * (719) 536-3300. - * - * PCI BIOS Specification Revision - * PCI Local Bus Specification - * PCI System Design Guide - * - * PCI Special Interest Group - * M/S HF3-15A - * 5200 N.E. Elam Young Parkway - * Hillsboro, Oregon 97124-6497 - * +1 (503) 696-2000 - * +1 (800) 433-5177 - */ - -/* - * Design issues : - * The cumulative latency needed to propagate a read/write request - * through the file system, buffer cache, driver stacks, SCSI host, and - * SCSI device is ultimately the limiting factor in throughput once we - * have a sufficiently fast host adapter. - * - * So, to maximize performance we want to keep the ratio of latency to data - * transfer time to a minimum by - * 1. Minimizing the total number of commands sent (typical command latency - * including drive and bus mastering host overhead is as high as 4.5ms) - * to transfer a given amount of data. - * - * This is accomplished by placing no arbitrary limit on the number - * of scatter/gather buffers supported, since we can transfer 1K - * per scatter/gather buffer without Eric's cluster patches, - * 4K with. - * - * 2. Minimizing the number of fatal interrupts serviced, since - * fatal interrupts halt the SCSI I/O processor. Basically, - * this means offloading the practical maximum amount of processing - * to the SCSI chip. - * - * On the NCR53c810/820/720, this is accomplished by using - * interrupt-on-the-fly signals when commands complete, - * and only handling fatal errors and SDTR / WDTR messages - * in the host code. - * - * On the NCR53c710, interrupts are generated as on the NCR53c8x0, - * only the lack of a interrupt-on-the-fly facility complicates - * things. Also, SCSI ID registers and commands are - * bit fielded rather than binary encoded. - * - * On the NCR53c700 and NCR53c700-66, operations that are done via - * indirect, table mode on the more advanced chips must be - * replaced by calls through a jump table which - * acts as a surrogate for the DSA. Unfortunately, this - * will mean that we must service an interrupt for each - * disconnect/reconnect. - * - * 3. Eliminating latency by pipelining operations at the different levels. - * - * This driver allows a configurable number of commands to be enqueued - * for each target/lun combination (experimentally, I have discovered - * that two seems to work best) and will ultimately allow for - * SCSI-II tagged queuing. - * - * - * Architecture : - * This driver is built around a Linux queue of commands waiting to - * be executed, and a shared Linux/NCR array of commands to start. Commands - * are transferred to the array by the run_process_issue_queue() function - * which is called whenever a command completes. - * - * As commands are completed, the interrupt routine is triggered, - * looks for commands in the linked list of completed commands with - * valid status, removes these commands from a list of running commands, - * calls the done routine, and flags their target/luns as not busy. - * - * Due to limitations in the intelligence of the NCR chips, certain - * concessions are made. In many cases, it is easier to dynamically - * generate/fix-up code rather than calculate on the NCR at run time. - * So, code is generated or fixed up for - * - * - Handling data transfers, using a variable number of MOVE instructions - * interspersed with CALL MSG_IN, WHEN MSGIN instructions. - * - * The DATAIN and DATAOUT routines are separate, so that an incorrect - * direction can be trapped, and space isn't wasted. - * - * It may turn out that we're better off using some sort - * of table indirect instruction in a loop with a variable - * sized table on the NCR53c710 and newer chips. - * - * - Checking for reselection (NCR53c710 and better) - * - * - Handling the details of SCSI context switches (NCR53c710 and better), - * such as reprogramming appropriate synchronous parameters, - * removing the dsa structure from the NCR's queue of outstanding - * commands, etc. - * - */ - -#include <linux/module.h> - - -#include <linux/types.h> -#include <asm/setup.h> -#include <asm/dma.h> -#include <asm/io.h> -#include <asm/system.h> -#include <linux/delay.h> -#include <linux/signal.h> -#include <linux/sched.h> -#include <linux/errno.h> -#include <linux/string.h> -#include <linux/slab.h> -#include <linux/vmalloc.h> -#include <linux/mm.h> -#include <linux/ioport.h> -#include <linux/time.h> -#include <linux/blkdev.h> -#include <linux/spinlock.h> -#include <linux/interrupt.h> -#include <asm/pgtable.h> - -#ifdef CONFIG_AMIGA -#include <asm/amigahw.h> -#include <asm/amigaints.h> -#include <asm/irq.h> - -#define BIG_ENDIAN -#define NO_IO_SPACE -#endif - -#ifdef CONFIG_MVME16x -#include <asm/mvme16xhw.h> - -#define BIG_ENDIAN -#define NO_IO_SPACE -#define VALID_IDS -#endif - -#ifdef CONFIG_BVME6000 -#include <asm/bvme6000hw.h> - -#define BIG_ENDIAN -#define NO_IO_SPACE -#define VALID_IDS -#endif - -#include "scsi.h" -#include <scsi/scsi_dbg.h> -#include <scsi/scsi_host.h> -#include <scsi/scsi_transport_spi.h> -#include "53c7xx.h" -#include <linux/stat.h> -#include <linux/stddef.h> - -#ifdef NO_IO_SPACE -/* - * The following make the definitions in 53c7xx.h (write8, etc) smaller, - * we don't have separate i/o space anyway. - */ -#undef inb -#undef outb -#undef inw -#undef outw -#undef inl -#undef outl -#define inb(x) 1 -#define inw(x) 1 -#define inl(x) 1 -#define outb(x,y) 1 -#define outw(x,y) 1 -#define outl(x,y) 1 -#endif - -static int check_address (unsigned long addr, int size); -static void dump_events (struct Scsi_Host *host, int count); -static Scsi_Cmnd * return_outstanding_commands (struct Scsi_Host *host, - int free, int issue); -static void hard_reset (struct Scsi_Host *host); -static void ncr_scsi_reset (struct Scsi_Host *host); -static void print_lots (struct Scsi_Host *host); -static void set_synchronous (struct Scsi_Host *host, int target, int sxfer, - int scntl3, int now_connected); -static int datapath_residual (struct Scsi_Host *host); -static const char * sbcl_to_phase (int sbcl); -static void print_progress (Scsi_Cmnd *cmd); -static void print_queues (struct Scsi_Host *host); -static void process_issue_queue (unsigned long flags); -static int shutdown (struct Scsi_Host *host); -static void abnormal_finished (struct NCR53c7x0_cmd *cmd, int result); -static int disable (struct Scsi_Host *host); -static int NCR53c7xx_run_tests (struct Scsi_Host *host); -static irqreturn_t NCR53c7x0_intr(int irq, void *dev_id); -static void NCR53c7x0_intfly (struct Scsi_Host *host); -static int ncr_halt (struct Scsi_Host *host); -static void intr_phase_mismatch (struct Scsi_Host *host, struct NCR53c7x0_cmd - *cmd); -static void intr_dma (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd); -static void print_dsa (struct Scsi_Host *host, u32 *dsa, - const char *prefix); -static int print_insn (struct Scsi_Host *host, const u32 *insn, - const char *prefix, int kernel); - -static void NCR53c7xx_dsa_fixup (struct NCR53c7x0_cmd *cmd); -static void NCR53c7x0_init_fixup (struct Scsi_Host *host); -static int NCR53c7x0_dstat_sir_intr (struct Scsi_Host *host, struct - NCR53c7x0_cmd *cmd); -static void NCR53c7x0_soft_reset (struct Scsi_Host *host); - -/* Size of event list (per host adapter) */ -static int track_events = 0; -static struct Scsi_Host *first_host = NULL; /* Head of list of NCR boards */ -static struct scsi_host_template *the_template = NULL; - -/* NCR53c710 script handling code */ - -#include "53c7xx_d.h" -#ifdef A_int_debug_sync -#define DEBUG_SYNC_INTR A_int_debug_sync -#endif -int NCR53c7xx_script_len = sizeof (SCRIPT); -int NCR53c7xx_dsa_len = A_dsa_end + Ent_dsa_zero - Ent_dsa_code_template; -#ifdef FORCE_DSA_ALIGNMENT -int CmdPageStart = (0 - Ent_dsa_zero - sizeof(struct NCR53c7x0_cmd)) & 0xff; -#endif - -static char *setup_strings[] = - {"","","","","","","",""}; - -#define MAX_SETUP_STRINGS ARRAY_SIZE(setup_strings) -#define SETUP_BUFFER_SIZE 200 -static char setup_buffer[SETUP_BUFFER_SIZE]; -static char setup_used[MAX_SETUP_STRINGS]; - -void ncr53c7xx_setup (char *str, int *ints) -{ - int i; - char *p1, *p2; - - p1 = setup_buffer; - *p1 = '\0'; - if (str) - strncpy(p1, str, SETUP_BUFFER_SIZE - strlen(setup_buffer)); - setup_buffer[SETUP_BUFFER_SIZE - 1] = '\0'; - p1 = setup_buffer; - i = 0; - while (*p1 && (i < MAX_SETUP_STRINGS)) { - p2 = strchr(p1, ','); - if (p2) { - *p2 = '\0'; - if (p1 != p2) - setup_strings[i] = p1; - p1 = p2 + 1; - i++; - } - else { - setup_strings[i] = p1; - break; - } - } - for (i=0; i<MAX_SETUP_STRINGS; i++) - setup_used[i] = 0; -} - - -/* check_setup_strings() returns index if key found, 0 if not - */ - -static int check_setup_strings(char *key, int *flags, int *val, char *buf) -{ -int x; -char *cp; - - for (x=0; x<MAX_SETUP_STRINGS; x++) { - if (setup_used[x]) - continue; - if (!strncmp(setup_strings[x], key, strlen(key))) - break; - if (!strncmp(setup_strings[x], "next", strlen("next"))) - return 0; - } - if (x == MAX_SETUP_STRINGS) - return 0; - setup_used[x] = 1; - cp = setup_strings[x] + strlen(key); - *val = -1; - if (*cp != ':') - return ++x; - cp++; - if ((*cp >= '0') && (*cp <= '9')) { - *val = simple_strtoul(cp,NULL,0); - } - return ++x; -} - - - -/* - * KNOWN BUGS : - * - There is some sort of conflict when the PPP driver is compiled with - * support for 16 channels? - * - * - On systems which predate the 1.3.x initialization order change, - * the NCR driver will cause Cannot get free page messages to appear. - * These are harmless, but I don't know of an easy way to avoid them. - * - * - With OPTION_DISCONNECT, on two systems under unknown circumstances, - * we get a PHASE MISMATCH with DSA set to zero (suggests that we - * are occurring somewhere in the reselection code) where - * DSP=some value DCMD|DBC=same value. - * - * Closer inspection suggests that we may be trying to execute - * some portion of the DSA? - * scsi0 : handling residual transfer (+ 0 bytes from DMA FIFO) - * scsi0 : handling residual transfer (+ 0 bytes from DMA FIFO) - * scsi0 : no current command : unexpected phase MSGIN. - * DSP=0x1c46cc, DCMD|DBC=0x1c46ac, DSA=0x0 - * DSPS=0x0, TEMP=0x1c3e70, DMODE=0x80 - * scsi0 : DSP-> - * 001c46cc : 0x001c46cc 0x00000000 - * 001c46d4 : 0x001c5ea0 0x000011f8 - * - * Changed the print code in the phase_mismatch handler so - * that we call print_lots to try to diagnose this. - * - */ - -/* - * Possible future direction of architecture for max performance : - * - * We're using a single start array for the NCR chip. This is - * sub-optimal, because we cannot add a command which would conflict with - * an executing command to this start queue, and therefore must insert the - * next command for a given I/T/L combination after the first has completed; - * incurring our interrupt latency between SCSI commands. - * - * To allow further pipelining of the NCR and host CPU operation, we want - * to set things up so that immediately on termination of a command destined - * for a given LUN, we get that LUN busy again. - * - * To do this, we need to add a 32 bit pointer to which is jumped to - * on completion of a command. If no new command is available, this - * would point to the usual DSA issue queue select routine. - * - * If one were, it would point to a per-NCR53c7x0_cmd select routine - * which starts execution immediately, inserting the command at the head - * of the start queue if the NCR chip is selected or reselected. - * - * We would change so that we keep a list of outstanding commands - * for each unit, rather than a single running_list. We'd insert - * a new command into the right running list; if the NCR didn't - * have something running for that yet, we'd put it in the - * start queue as well. Some magic needs to happen to handle the - * race condition between the first command terminating before the - * new one is written. - * - * Potential for profiling : - * Call do_gettimeofday(struct timeval *tv) to get 800ns resolution. - */ - - -/* - * TODO : - * 1. To support WIDE transfers, not much needs to happen. We - * should do CHMOVE instructions instead of MOVEs when - * we have scatter/gather segments of uneven length. When - * we do this, we need to handle the case where we disconnect - * between segments. - * - * 2. Currently, when Icky things happen we do a FATAL(). Instead, - * we want to do an integrity check on the parts of the NCR hostdata - * structure which were initialized at boot time; FATAL() if that - * fails, and otherwise try to recover. Keep track of how many - * times this has happened within a single SCSI command; if it - * gets excessive, then FATAL(). - * - * 3. Parity checking is currently disabled, and a few things should - * happen here now that we support synchronous SCSI transfers : - * 1. On soft-reset, we shoould set the EPC (Enable Parity Checking) - * and AAP (Assert SATN/ on parity error) bits in SCNTL0. - * - * 2. We should enable the parity interrupt in the SIEN0 register. - * - * 3. intr_phase_mismatch() needs to believe that message out is - * always an "acceptable" phase to have a mismatch in. If - * the old phase was MSG_IN, we should send a MESSAGE PARITY - * error. If the old phase was something else, we should send - * a INITIATOR_DETECTED_ERROR message. Note that this could - * cause a RESTORE POINTERS message; so we should handle that - * correctly first. Instead, we should probably do an - * initiator_abort. - * - * 4. MPEE bit of CTEST4 should be set so we get interrupted if - * we detect an error. - * - * - * 5. The initial code has been tested on the NCR53c810. I don't - * have access to NCR53c700, 700-66 (Forex boards), NCR53c710 - * (NCR Pentium systems), NCR53c720, NCR53c820, or NCR53c825 boards to - * finish development on those platforms. - * - * NCR53c820/825/720 - need to add wide transfer support, including WDTR - * negotiation, programming of wide transfer capabilities - * on reselection and table indirect selection. - * - * NCR53c710 - need to add fatal interrupt or GEN code for - * command completion signaling. Need to modify all - * SDID, SCID, etc. registers, and table indirect select code - * since these use bit fielded (ie 1<<target) instead of - * binary encoded target ids. Need to accommodate - * different register mappings, probably scan through - * the SCRIPT code and change the non SFBR register operand - * of all MOVE instructions. - * - * It is rather worse than this actually, the 710 corrupts - * both TEMP and DSA when you do a MOVE MEMORY. This - * screws you up all over the place. MOVE MEMORY 4 with a - * destination of DSA seems to work OK, which helps some. - * Richard Hirst richard@sleepie.demon.co.uk - * - * NCR53c700/700-66 - need to add code to refix addresses on - * every nexus change, eliminate all table indirect code, - * very messy. - * - * 6. The NCR53c7x0 series is very popular on other platforms that - * could be running Linux - ie, some high performance AMIGA SCSI - * boards use it. - * - * So, I should include #ifdef'd code so that it is - * compatible with these systems. - * - * Specifically, the little Endian assumptions I made in my - * bit fields need to change, and if the NCR doesn't see memory - * the right way, we need to provide options to reverse words - * when the scripts are relocated. - * - * 7. Use vremap() to access memory mapped boards. - */ - -/* - * Allow for simultaneous existence of multiple SCSI scripts so we - * can have a single driver binary for all of the family. - * - * - one for NCR53c700 and NCR53c700-66 chips (not yet supported) - * - one for rest (only the NCR53c810, 815, 820, and 825 are currently - * supported) - * - * So that we only need two SCSI scripts, we need to modify things so - * that we fixup register accesses in READ/WRITE instructions, and - * we'll also have to accommodate the bit vs. binary encoding of IDs - * with the 7xx chips. - */ - -#define ROUNDUP(adr,type) \ - ((void *) (((long) (adr) + sizeof(type) - 1) & ~(sizeof(type) - 1))) - - -/* - * Function: issue_to_cmd - * - * Purpose: convert jump instruction in issue array to NCR53c7x0_cmd - * structure pointer. - * - * Inputs; issue - pointer to start of NOP or JUMP instruction - * in issue array. - * - * Returns: pointer to command on success; 0 if opcode is NOP. - */ - -static inline struct NCR53c7x0_cmd * -issue_to_cmd (struct Scsi_Host *host, struct NCR53c7x0_hostdata *hostdata, - u32 *issue) -{ - return (issue[0] != hostdata->NOP_insn) ? - /* - * If the IF TRUE bit is set, it's a JUMP instruction. The - * operand is a bus pointer to the dsa_begin routine for this DSA. The - * dsa field of the NCR53c7x0_cmd structure starts with the - * DSA code template. By converting to a virtual address, - * subtracting the code template size, and offset of the - * dsa field, we end up with a pointer to the start of the - * structure (alternatively, we could use the - * dsa_cmnd field, an anachronism from when we weren't - * sure what the relationship between the NCR structures - * and host structures were going to be. - */ - (struct NCR53c7x0_cmd *) ((char *) bus_to_virt (issue[1]) - - (hostdata->E_dsa_code_begin - hostdata->E_dsa_code_template) - - offsetof(struct NCR53c7x0_cmd, dsa)) - /* If the IF TRUE bit is not set, it's a NOP */ - : NULL; -} - - -/* - * FIXME: we should junk these, in favor of synchronous_want and - * wide_want in the NCR53c7x0_hostdata structure. - */ - -/* Template for "preferred" synchronous transfer parameters. */ - -static const unsigned char sdtr_message[] = { -#ifdef CONFIG_SCSI_NCR53C7xx_FAST - EXTENDED_MESSAGE, 3 /* length */, EXTENDED_SDTR, 25 /* *4ns */, 8 /* off */ -#else - EXTENDED_MESSAGE, 3 /* length */, EXTENDED_SDTR, 50 /* *4ns */, 8 /* off */ -#endif -}; - -/* Template to request asynchronous transfers */ - -static const unsigned char async_message[] = { - EXTENDED_MESSAGE, 3 /* length */, EXTENDED_SDTR, 0, 0 /* asynchronous */ -}; - -/* Template for "preferred" WIDE transfer parameters */ - -static const unsigned char wdtr_message[] = { - EXTENDED_MESSAGE, 2 /* length */, EXTENDED_WDTR, 1 /* 2^1 bytes */ -}; - -#if 0 -/* - * Function : struct Scsi_Host *find_host (int host) - * - * Purpose : KGDB support function which translates a host number - * to a host structure. - * - * Inputs : host - number of SCSI host - * - * Returns : NULL on failure, pointer to host structure on success. - */ - -static struct Scsi_Host * -find_host (int host) { - struct Scsi_Host *h; - for (h = first_host; h && h->host_no != host; h = h->next); - if (!h) { - printk (KERN_ALERT "scsi%d not found\n", host); - return NULL; - } else if (h->hostt != the_template) { - printk (KERN_ALERT "scsi%d is not a NCR board\n", host); - return NULL; - } - return h; -} - -#if 0 -/* - * Function : request_synchronous (int host, int target) - * - * Purpose : KGDB interface which will allow us to negotiate for - * synchronous transfers. This ill be replaced with a more - * integrated function; perhaps a new entry in the scsi_host - * structure, accessible via an ioctl() or perhaps /proc/scsi. - * - * Inputs : host - number of SCSI host; target - number of target. - * - * Returns : 0 when negotiation has been setup for next SCSI command, - * -1 on failure. - */ - -static int -request_synchronous (int host, int target) { - struct Scsi_Host *h; - struct NCR53c7x0_hostdata *hostdata; - unsigned long flags; - if (target < 0) { - printk (KERN_ALERT "target %d is bogus\n", target); - return -1; - } - if (!(h = find_host (host))) - return -1; - else if (h->this_id == target) { - printk (KERN_ALERT "target %d is host ID\n", target); - return -1; - } - else if (target >= h->max_id) { - printk (KERN_ALERT "target %d exceeds maximum of %d\n", target, - h->max_id); - return -1; - } - hostdata = (struct NCR53c7x0_hostdata *)h->hostdata[0]; - - local_irq_save(flags); - if (hostdata->initiate_sdtr & (1 << target)) { - local_irq_restore(flags); - printk (KERN_ALERT "target %d already doing SDTR\n", target); - return -1; - } - hostdata->initiate_sdtr |= (1 << target); - local_irq_restore(flags); - return 0; -} -#endif - -/* - * Function : request_disconnect (int host, int on_or_off) - * - * Purpose : KGDB support function, tells us to allow or disallow - * disconnections. - * - * Inputs : host - number of SCSI host; on_or_off - non-zero to allow, - * zero to disallow. - * - * Returns : 0 on success, * -1 on failure. - */ - -static int -request_disconnect (int host, int on_or_off) { - struct Scsi_Host *h; - struct NCR53c7x0_hostdata *hostdata; - if (!(h = find_host (host))) - return -1; - hostdata = (struct NCR53c7x0_hostdata *) h->hostdata[0]; - if (on_or_off) - hostdata->options |= OPTION_DISCONNECT; - else - hostdata->options &= ~OPTION_DISCONNECT; - return 0; -} -#endif - -/* - * Function : static void NCR53c7x0_driver_init (struct Scsi_Host *host) - * - * Purpose : Initialize internal structures, as required on startup, or - * after a SCSI bus reset. - * - * Inputs : host - pointer to this host adapter's structure - */ - -static void -NCR53c7x0_driver_init (struct Scsi_Host *host) { - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - int i, j; - u32 *ncrcurrent; - - for (i = 0; i < 16; ++i) { - hostdata->request_sense[i] = 0; - for (j = 0; j < 8; ++j) - hostdata->busy[i][j] = 0; - set_synchronous (host, i, /* sxfer */ 0, hostdata->saved_scntl3, 0); - } - hostdata->issue_queue = NULL; - hostdata->running_list = hostdata->finished_queue = - hostdata->ncrcurrent = NULL; - for (i = 0, ncrcurrent = (u32 *) hostdata->schedule; - i < host->can_queue; ++i, ncrcurrent += 2) { - ncrcurrent[0] = hostdata->NOP_insn; - ncrcurrent[1] = 0xdeadbeef; - } - ncrcurrent[0] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_JUMP) << 24) | DBC_TCI_TRUE; - ncrcurrent[1] = (u32) virt_to_bus (hostdata->script) + - hostdata->E_wait_reselect; - hostdata->reconnect_dsa_head = 0; - hostdata->addr_reconnect_dsa_head = (u32) - virt_to_bus((void *) &(hostdata->reconnect_dsa_head)); - hostdata->expecting_iid = 0; - hostdata->expecting_sto = 0; - if (hostdata->options & OPTION_ALWAYS_SYNCHRONOUS) - hostdata->initiate_sdtr = 0xffff; - else - hostdata->initiate_sdtr = 0; - hostdata->talked_to = 0; - hostdata->idle = 1; -} - -/* - * Function : static int clock_to_ccf_710 (int clock) - * - * Purpose : Return the clock conversion factor for a given SCSI clock. - * - * Inputs : clock - SCSI clock expressed in Hz. - * - * Returns : ccf on success, -1 on failure. - */ - -static int -clock_to_ccf_710 (int clock) { - if (clock <= 16666666) - return -1; - if (clock <= 25000000) - return 2; /* Divide by 1.0 */ - else if (clock <= 37500000) - return 1; /* Divide by 1.5 */ - else if (clock <= 50000000) - return 0; /* Divide by 2.0 */ - else if (clock <= 66000000) - return 3; /* Divide by 3.0 */ - else - return -1; -} - -/* - * Function : static int NCR53c7x0_init (struct Scsi_Host *host) - * - * Purpose : initialize the internal structures for a given SCSI host - * - * Inputs : host - pointer to this host adapter's structure - * - * Preconditions : when this function is called, the chip_type - * field of the hostdata structure MUST have been set. - * - * Returns : 0 on success, -1 on failure. - */ - -int -NCR53c7x0_init (struct Scsi_Host *host) { - NCR53c7x0_local_declare(); - int i, ccf; - unsigned char revision; - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - /* - * There are some things which we need to know about in order to provide - * a semblance of support. Print 'em if they aren't what we expect, - * otherwise don't add to the noise. - * - * -1 means we don't know what to expect. - */ - int val, flags; - char buf[32]; - int expected_id = -1; - int expected_clock = -1; - int uninitialized = 0; -#ifdef NO_IO_SPACE - int expected_mapping = OPTION_MEMORY_MAPPED; -#else - int expected_mapping = OPTION_IO_MAPPED; -#endif - for (i=0;i<7;i++) - hostdata->valid_ids[i] = 1; /* Default all ID's to scan */ - - /* Parse commandline flags */ - if (check_setup_strings("noasync",&flags,&val,buf)) - { - hostdata->options |= OPTION_NO_ASYNC; - hostdata->options &= ~(OPTION_SYNCHRONOUS | OPTION_ALWAYS_SYNCHRONOUS); - } - - if (check_setup_strings("nosync",&flags,&val,buf)) - { - hostdata->options &= ~(OPTION_SYNCHRONOUS | OPTION_ALWAYS_SYNCHRONOUS); - } - - if (check_setup_strings("nodisconnect",&flags,&val,buf)) - hostdata->options &= ~OPTION_DISCONNECT; - - if (check_setup_strings("validids",&flags,&val,buf)) - { - for (i=0;i<7;i++) - hostdata->valid_ids[i] = val & (1<<i); - } - - if ((i = check_setup_strings("next",&flags,&val,buf))) - { - while (i) - setup_used[--i] = 1; - } - - if (check_setup_strings("opthi",&flags,&val,buf)) - hostdata->options = (long long)val << 32; - if (check_setup_strings("optlo",&flags,&val,buf)) - hostdata->options |= val; - - NCR53c7x0_local_setup(host); - switch (hostdata->chip) { - case 710: - case 770: - hostdata->dstat_sir_intr = NCR53c7x0_dstat_sir_intr; - hostdata->init_save_regs = NULL; - hostdata->dsa_fixup = NCR53c7xx_dsa_fixup; - hostdata->init_fixup = NCR53c7x0_init_fixup; - hostdata->soft_reset = NCR53c7x0_soft_reset; - hostdata->run_tests = NCR53c7xx_run_tests; - expected_clock = hostdata->scsi_clock; - expected_id = 7; - break; - default: - printk ("scsi%d : chip type of %d is not supported yet, detaching.\n", - host->host_no, hostdata->chip); - scsi_unregister (host); - return -1; - } - - /* Assign constants accessed by NCR */ - hostdata->NCR53c7xx_zero = 0; - hostdata->NCR53c7xx_msg_reject = MESSAGE_REJECT; - hostdata->NCR53c7xx_msg_abort = ABORT; - hostdata->NCR53c7xx_msg_nop = NOP; - hostdata->NOP_insn = (DCMD_TYPE_TCI|DCMD_TCI_OP_JUMP) << 24; - if (expected_mapping == -1 || - (hostdata->options & (OPTION_MEMORY_MAPPED)) != - (expected_mapping & OPTION_MEMORY_MAPPED)) - printk ("scsi%d : using %s mapped access\n", host->host_no, - (hostdata->options & OPTION_MEMORY_MAPPED) ? "memory" : - "io"); - - hostdata->dmode = (hostdata->chip == 700 || hostdata->chip == 70066) ? - DMODE_REG_00 : DMODE_REG_10; - hostdata->istat = ((hostdata->chip / 100) == 8) ? - ISTAT_REG_800 : ISTAT_REG_700; - -/* We have to assume that this may be the first access to the chip, so - * we must set EA in DCNTL. */ - - NCR53c7x0_write8 (DCNTL_REG, DCNTL_10_EA|DCNTL_10_COM); - - -/* Only the ISTAT register is readable when the NCR is running, so make - sure it's halted. */ - ncr_halt(host); - -/* - * XXX - the NCR53c700 uses bitfielded registers for SCID, SDID, etc, - * as does the 710 with one bit per SCSI ID. Conversely, the NCR - * uses a normal, 3 bit binary representation of these values. - * - * Get the rest of the NCR documentation, and FIND OUT where the change - * was. - */ - -#if 0 - /* May not be able to do this - chip my not have been set up yet */ - tmp = hostdata->this_id_mask = NCR53c7x0_read8(SCID_REG); - for (host->this_id = 0; tmp != 1; tmp >>=1, ++host->this_id); -#else - host->this_id = 7; -#endif - -/* - * Note : we should never encounter a board setup for ID0. So, - * if we see ID0, assume that it was uninitialized and set it - * to the industry standard 7. - */ - if (!host->this_id) { - printk("scsi%d : initiator ID was %d, changing to 7\n", - host->host_no, host->this_id); - host->this_id = 7; - hostdata->this_id_mask = 1 << 7; - uninitialized = 1; - }; - - if (expected_id == -1 || host->this_id != expected_id) - printk("scsi%d : using initiator ID %d\n", host->host_no, - host->this_id); - - /* - * Save important registers to allow a soft reset. - */ - - /* - * CTEST7 controls cache snooping, burst mode, and support for - * external differential drivers. This isn't currently used - the - * default value may not be optimal anyway. - * Even worse, it may never have been set up since reset. - */ - hostdata->saved_ctest7 = NCR53c7x0_read8(CTEST7_REG) & CTEST7_SAVE; - revision = (NCR53c7x0_read8(CTEST8_REG) & 0xF0) >> 4; - switch (revision) { - case 1: revision = 0; break; - case 2: revision = 1; break; - case 4: revision = 2; break; - case 8: revision = 3; break; - default: revision = 255; break; - } - printk("scsi%d: Revision 0x%x\n",host->host_no,revision); - - if ((revision == 0 || revision == 255) && (hostdata->options & (OPTION_SYNCHRONOUS|OPTION_DISCONNECT|OPTION_ALWAYS_SYNCHRONOUS))) - { - printk ("scsi%d: Disabling sync working and disconnect/reselect\n", - host->host_no); - hostdata->options &= ~(OPTION_SYNCHRONOUS|OPTION_DISCONNECT|OPTION_ALWAYS_SYNCHRONOUS); - } - - /* - * On NCR53c700 series chips, DCNTL controls the SCSI clock divisor, - * on 800 series chips, it allows for a totem-pole IRQ driver. - * NOTE saved_dcntl currently overwritten in init function. - * The value read here may be garbage anyway, MVME16x board at least - * does not initialise chip if kernel arrived via tftp. - */ - - hostdata->saved_dcntl = NCR53c7x0_read8(DCNTL_REG); - - /* - * DMODE controls DMA burst length, and on 700 series chips, - * 286 mode and bus width - * NOTE: On MVME16x, chip may have been reset, so this could be a - * power-on/reset default value. - */ - hostdata->saved_dmode = NCR53c7x0_read8(hostdata->dmode); - - /* - * Now that burst length and enabled/disabled status is known, - * clue the user in on it. - */ - - ccf = clock_to_ccf_710 (expected_clock); - - for (i = 0; i < 16; ++i) - hostdata->cmd_allocated[i] = 0; - - if (hostdata->init_save_regs) - hostdata->init_save_regs (host); - if (hostdata->init_fixup) - hostdata->init_fixup (host); - - if (!the_template) { - the_template = host->hostt; - first_host = host; - } - - /* - * Linux SCSI drivers have always been plagued with initialization - * problems - some didn't work with the BIOS disabled since they expected - * initialization from it, some didn't work when the networking code - * was enabled and registers got scrambled, etc. - * - * To avoid problems like this, in the future, we will do a soft - * reset on the SCSI chip, taking it back to a sane state. - */ - - hostdata->soft_reset (host); - -#if 1 - hostdata->debug_count_limit = -1; -#else - hostdata->debug_count_limit = 1; -#endif - hostdata->intrs = -1; - hostdata->resets = -1; - memcpy ((void *) hostdata->synchronous_want, (void *) sdtr_message, - sizeof (hostdata->synchronous_want)); - - NCR53c7x0_driver_init (host); - - if (request_irq(host->irq, NCR53c7x0_intr, IRQF_SHARED, "53c7xx", host)) - { - printk("scsi%d : IRQ%d not free, detaching\n", - host->host_no, host->irq); - goto err_unregister; - } - - if ((hostdata->run_tests && hostdata->run_tests(host) == -1) || - (hostdata->options & OPTION_DEBUG_TESTS_ONLY)) { - /* XXX Should disable interrupts, etc. here */ - goto err_free_irq; - } else { - if (host->io_port) { - host->n_io_port = 128; - if (!request_region (host->io_port, host->n_io_port, "ncr53c7xx")) - goto err_free_irq; - } - } - - if (NCR53c7x0_read8 (SBCL_REG) & SBCL_BSY) { - printk ("scsi%d : bus wedge, doing SCSI reset\n", host->host_no); - hard_reset (host); - } - return 0; - - err_free_irq: - free_irq(host->irq, NCR53c7x0_intr); - err_unregister: - scsi_unregister(host); - return -1; -} - -/* - * Function : int ncr53c7xx_init(struct scsi_host_template *tpnt, int board, int chip, - * unsigned long base, int io_port, int irq, int dma, long long options, - * int clock); - * - * Purpose : initializes a NCR53c7,8x0 based on base addresses, - * IRQ, and DMA channel. - * - * Inputs : tpnt - Template for this SCSI adapter, board - board level - * product, chip - 710 - * - * Returns : 0 on success, -1 on failure. - * - */ - -int -ncr53c7xx_init (struct scsi_host_template *tpnt, int board, int chip, - unsigned long base, int io_port, int irq, int dma, - long long options, int clock) -{ - struct Scsi_Host *instance; - struct NCR53c7x0_hostdata *hostdata; - char chip_str[80]; - int script_len = 0, dsa_len = 0, size = 0, max_cmd_size = 0, - schedule_size = 0, ok = 0; - void *tmp; - unsigned long page; - - switch (chip) { - case 710: - case 770: - schedule_size = (tpnt->can_queue + 1) * 8 /* JUMP instruction size */; - script_len = NCR53c7xx_script_len; - dsa_len = NCR53c7xx_dsa_len; - options |= OPTION_INTFLY; - sprintf (chip_str, "NCR53c%d", chip); - break; - default: - printk("scsi-ncr53c7xx : unsupported SCSI chip %d\n", chip); - return -1; - } - - printk("scsi-ncr53c7xx : %s at memory 0x%lx, io 0x%x, irq %d", - chip_str, base, io_port, irq); - if (dma == DMA_NONE) - printk("\n"); - else - printk(", dma %d\n", dma); - - if (options & OPTION_DEBUG_PROBE_ONLY) { - printk ("scsi-ncr53c7xx : probe only enabled, aborting initialization\n"); - return -1; - } - - max_cmd_size = sizeof(struct NCR53c7x0_cmd) + dsa_len + - /* Size of dynamic part of command structure : */ - 2 * /* Worst case : we don't know if we need DATA IN or DATA out */ - ( 2 * /* Current instructions per scatter/gather segment */ - tpnt->sg_tablesize + - 3 /* Current startup / termination required per phase */ - ) * - 8 /* Each instruction is eight bytes */; - - /* Allocate fixed part of hostdata, dynamic part to hold appropriate - SCSI SCRIPT(tm) plus a single, maximum-sized NCR53c7x0_cmd structure. - - We need a NCR53c7x0_cmd structure for scan_scsis() when we are - not loaded as a module, and when we're loaded as a module, we - can't use a non-dynamically allocated structure because modules - are vmalloc()'d, which can allow structures to cross page - boundaries and breaks our physical/virtual address assumptions - for DMA. - - So, we stick it past the end of our hostdata structure. - - ASSUMPTION : - Regardless of how many simultaneous SCSI commands we allow, - the probe code only executes a _single_ instruction at a time, - so we only need one here, and don't need to allocate NCR53c7x0_cmd - structures for each target until we are no longer in scan_scsis - and kmalloc() has become functional (memory_init() happens - after all device driver initialization). - */ - - size = sizeof(struct NCR53c7x0_hostdata) + script_len + - /* Note that alignment will be guaranteed, since we put the command - allocated at probe time after the fixed-up SCSI script, which - consists of 32 bit words, aligned on a 32 bit boundary. But - on a 64bit machine we need 8 byte alignment for hostdata->free, so - we add in another 4 bytes to take care of potential misalignment - */ - (sizeof(void *) - sizeof(u32)) + max_cmd_size + schedule_size; - - page = __get_free_pages(GFP_ATOMIC,1); - if(page==0) - { - printk(KERN_ERR "53c7xx: out of memory.\n"); - return -ENOMEM; - } -#ifdef FORCE_DSA_ALIGNMENT - /* - * 53c710 rev.0 doesn't have an add-with-carry instruction. - * Ensure we allocate enough memory to force DSA alignment. - */ - size += 256; -#endif - /* Size should be < 8K, so we can fit it in two pages. */ - if (size > 8192) { - printk(KERN_ERR "53c7xx: hostdata > 8K\n"); - return -1; - } - - instance = scsi_register (tpnt, 4); - if (!instance) - { - free_page(page); - return -1; - } - instance->hostdata[0] = page; - memset((void *)instance->hostdata[0], 0, 8192); - cache_push(virt_to_phys((void *)(instance->hostdata[0])), 8192); - cache_clear(virt_to_phys((void *)(instance->hostdata[0])), 8192); - kernel_set_cachemode((void *)instance->hostdata[0], 8192, IOMAP_NOCACHE_SER); - - /* FIXME : if we ever support an ISA NCR53c7xx based board, we - need to check if the chip is running in a 16 bit mode, and if so - unregister it if it is past the 16M (0x1000000) mark */ - - hostdata = (struct NCR53c7x0_hostdata *)instance->hostdata[0]; - hostdata->size = size; - hostdata->script_count = script_len / sizeof(u32); - hostdata->board = board; - hostdata->chip = chip; - - /* - * Being memory mapped is more desirable, since - * - * - Memory accesses may be faster. - * - * - The destination and source address spaces are the same for - * all instructions, meaning we don't have to twiddle dmode or - * any other registers. - * - * So, we try for memory mapped, and if we don't get it, - * we go for port mapped, and that failing we tell the user - * it can't work. - */ - - if (base) { - instance->base = base; - /* Check for forced I/O mapping */ - if (!(options & OPTION_IO_MAPPED)) { - options |= OPTION_MEMORY_MAPPED; - ok = 1; - } - } else { - options &= ~OPTION_MEMORY_MAPPED; - } - - if (io_port) { - instance->io_port = io_port; - options |= OPTION_IO_MAPPED; - ok = 1; - } else { - options &= ~OPTION_IO_MAPPED; - } - - if (!ok) { - printk ("scsi%d : not initializing, no I/O or memory mapping known \n", - instance->host_no); - scsi_unregister (instance); - return -1; - } - instance->irq = irq; - instance->dma_channel = dma; - - hostdata->options = options; - hostdata->dsa_len = dsa_len; - hostdata->max_cmd_size = max_cmd_size; - hostdata->num_cmds = 1; - hostdata->scsi_clock = clock; - /* Initialize single command */ - tmp = (hostdata->script + hostdata->script_count); -#ifdef FORCE_DSA_ALIGNMENT - { - void *t = ROUNDUP(tmp, void *); - if (((u32)t & 0xff) > CmdPageStart) - t = (void *)((u32)t + 255); - t = (void *)(((u32)t & ~0xff) + CmdPageStart); - hostdata->free = t; -#if 0 - printk ("scsi: Registered size increased by 256 to %d\n", size); - printk ("scsi: CmdPageStart = 0x%02x\n", CmdPageStart); - printk ("scsi: tmp = 0x%08x, hostdata->free set to 0x%08x\n", - (u32)tmp, (u32)t); -#endif - } -#else - hostdata->free = ROUNDUP(tmp, void *); -#endif - hostdata->free->real = tmp; - hostdata->free->size = max_cmd_size; - hostdata->free->free = NULL; - hostdata->free->next = NULL; - hostdata->extra_allocate = 0; - - /* Allocate command start code space */ - hostdata->schedule = (chip == 700 || chip == 70066) ? - NULL : (u32 *) ((char *)hostdata->free + max_cmd_size); - -/* - * For diagnostic purposes, we don't really care how fast things blaze. - * For profiling, we want to access the 800ns resolution system clock, - * using a 'C' call on the host processor. - * - * Therefore, there's no need for the NCR chip to directly manipulate - * this data, and we should put it wherever is most convenient for - * Linux. - */ - if (track_events) - hostdata->events = (struct NCR53c7x0_event *) (track_events ? - vmalloc (sizeof (struct NCR53c7x0_event) * track_events) : NULL); - else - hostdata->events = NULL; - - if (hostdata->events) { - memset ((void *) hostdata->events, 0, sizeof(struct NCR53c7x0_event) * - track_events); - hostdata->event_size = track_events; - hostdata->event_index = 0; - } else - hostdata->event_size = 0; - - return NCR53c7x0_init(instance); -} - - -/* - * Function : static void NCR53c7x0_init_fixup (struct Scsi_Host *host) - * - * Purpose : copy and fixup the SCSI SCRIPTS(tm) code for this device. - * - * Inputs : host - pointer to this host adapter's structure - * - */ - -static void -NCR53c7x0_init_fixup (struct Scsi_Host *host) { - NCR53c7x0_local_declare(); - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - unsigned char tmp; - int i, ncr_to_memory, memory_to_ncr; - u32 base; - NCR53c7x0_local_setup(host); - - - /* XXX - NOTE : this code MUST be made endian aware */ - /* Copy code into buffer that was allocated at detection time. */ - memcpy ((void *) hostdata->script, (void *) SCRIPT, - sizeof(SCRIPT)); - /* Fixup labels */ - for (i = 0; i < PATCHES; ++i) - hostdata->script[LABELPATCHES[i]] += - virt_to_bus(hostdata->script); - /* Fixup addresses of constants that used to be EXTERNAL */ - - patch_abs_32 (hostdata->script, 0, NCR53c7xx_msg_abort, - virt_to_bus(&(hostdata->NCR53c7xx_msg_abort))); - patch_abs_32 (hostdata->script, 0, NCR53c7xx_msg_reject, - virt_to_bus(&(hostdata->NCR53c7xx_msg_reject))); - patch_abs_32 (hostdata->script, 0, NCR53c7xx_zero, - virt_to_bus(&(hostdata->NCR53c7xx_zero))); - patch_abs_32 (hostdata->script, 0, NCR53c7xx_sink, - virt_to_bus(&(hostdata->NCR53c7xx_sink))); - patch_abs_32 (hostdata->script, 0, NOP_insn, - virt_to_bus(&(hostdata->NOP_insn))); - patch_abs_32 (hostdata->script, 0, schedule, - virt_to_bus((void *) hostdata->schedule)); - - /* Fixup references to external variables: */ - for (i = 0; i < EXTERNAL_PATCHES_LEN; ++i) - hostdata->script[EXTERNAL_PATCHES[i].offset] += - virt_to_bus(EXTERNAL_PATCHES[i].address); - - /* - * Fixup absolutes set at boot-time. - * - * All non-code absolute variables suffixed with "dsa_" and "int_" - * are constants, and need no fixup provided the assembler has done - * it for us (I don't know what the "real" NCR assembler does in - * this case, my assembler does the right magic). - */ - - patch_abs_rwri_data (hostdata->script, 0, dsa_save_data_pointer, - Ent_dsa_code_save_data_pointer - Ent_dsa_zero); - patch_abs_rwri_data (hostdata->script, 0, dsa_restore_pointers, - Ent_dsa_code_restore_pointers - Ent_dsa_zero); - patch_abs_rwri_data (hostdata->script, 0, dsa_check_reselect, - Ent_dsa_code_check_reselect - Ent_dsa_zero); - - /* - * Just for the hell of it, preserve the settings of - * Burst Length and Enable Read Line bits from the DMODE - * register. Make sure SCRIPTS start automagically. - */ - -#if defined(CONFIG_MVME16x) || defined(CONFIG_BVME6000) - /* We know better what we want than 16xBug does! */ - tmp = DMODE_10_BL_8 | DMODE_10_FC2; -#else - tmp = NCR53c7x0_read8(DMODE_REG_10); - tmp &= (DMODE_BL_MASK | DMODE_10_FC2 | DMODE_10_FC1 | DMODE_710_PD | - DMODE_710_UO); -#endif - - if (!(hostdata->options & OPTION_MEMORY_MAPPED)) { - base = (u32) host->io_port; - memory_to_ncr = tmp|DMODE_800_DIOM; - ncr_to_memory = tmp|DMODE_800_SIOM; - } else { - base = virt_to_bus((void *)host->base); - memory_to_ncr = ncr_to_memory = tmp; - } - - /* SCRATCHB_REG_10 == SCRATCHA_REG_800, as it happens */ - patch_abs_32 (hostdata->script, 0, addr_scratch, base + SCRATCHA_REG_800); - patch_abs_32 (hostdata->script, 0, addr_temp, base + TEMP_REG); - patch_abs_32 (hostdata->script, 0, addr_dsa, base + DSA_REG); - - /* - * I needed some variables in the script to be accessible to - * both the NCR chip and the host processor. For these variables, - * I made the arbitrary decision to store them directly in the - * hostdata structure rather than in the RELATIVE area of the - * SCRIPTS. - */ - - - patch_abs_rwri_data (hostdata->script, 0, dmode_memory_to_memory, tmp); - patch_abs_rwri_data (hostdata->script, 0, dmode_memory_to_ncr, memory_to_ncr); - patch_abs_rwri_data (hostdata->script, 0, dmode_ncr_to_memory, ncr_to_memory); - - patch_abs_32 (hostdata->script, 0, msg_buf, - virt_to_bus((void *)&(hostdata->msg_buf))); - patch_abs_32 (hostdata->script, 0, reconnect_dsa_head, - virt_to_bus((void *)&(hostdata->reconnect_dsa_head))); - patch_abs_32 (hostdata->script, 0, addr_reconnect_dsa_head, - virt_to_bus((void *)&(hostdata->addr_reconnect_dsa_head))); - patch_abs_32 (hostdata->script, 0, reselected_identify, - virt_to_bus((void *)&(hostdata->reselected_identify))); -/* reselected_tag is currently unused */ -#if 0 - patch_abs_32 (hostdata->script, 0, reselected_tag, - virt_to_bus((void *)&(hostdata->reselected_tag))); -#endif - - patch_abs_32 (hostdata->script, 0, test_dest, - virt_to_bus((void*)&hostdata->test_dest)); - patch_abs_32 (hostdata->script, 0, test_src, - virt_to_bus(&hostdata->test_source)); - patch_abs_32 (hostdata->script, 0, saved_dsa, - virt_to_bus((void *)&hostdata->saved2_dsa)); - patch_abs_32 (hostdata->script, 0, emulfly, - virt_to_bus((void *)&hostdata->emulated_intfly)); - - patch_abs_rwri_data (hostdata->script, 0, dsa_check_reselect, - (unsigned char)(Ent_dsa_code_check_reselect - Ent_dsa_zero)); - -/* These are for event logging; the ncr_event enum contains the - actual interrupt numbers. */ -#ifdef A_int_EVENT_SELECT - patch_abs_32 (hostdata->script, 0, int_EVENT_SELECT, (u32) EVENT_SELECT); -#endif -#ifdef A_int_EVENT_DISCONNECT - patch_abs_32 (hostdata->script, 0, int_EVENT_DISCONNECT, (u32) EVENT_DISCONNECT); -#endif -#ifdef A_int_EVENT_RESELECT - patch_abs_32 (hostdata->script, 0, int_EVENT_RESELECT, (u32) EVENT_RESELECT); -#endif -#ifdef A_int_EVENT_COMPLETE - patch_abs_32 (hostdata->script, 0, int_EVENT_COMPLETE, (u32) EVENT_COMPLETE); -#endif -#ifdef A_int_EVENT_IDLE - patch_abs_32 (hostdata->script, 0, int_EVENT_IDLE, (u32) EVENT_IDLE); -#endif -#ifdef A_int_EVENT_SELECT_FAILED - patch_abs_32 (hostdata->script, 0, int_EVENT_SELECT_FAILED, - (u32) EVENT_SELECT_FAILED); -#endif -#ifdef A_int_EVENT_BEFORE_SELECT - patch_abs_32 (hostdata->script, 0, int_EVENT_BEFORE_SELECT, - (u32) EVENT_BEFORE_SELECT); -#endif -#ifdef A_int_EVENT_RESELECT_FAILED - patch_abs_32 (hostdata->script, 0, int_EVENT_RESELECT_FAILED, - (u32) EVENT_RESELECT_FAILED); -#endif - - /* - * Make sure the NCR and Linux code agree on the location of - * certain fields. - */ - - hostdata->E_accept_message = Ent_accept_message; - hostdata->E_command_complete = Ent_command_complete; - hostdata->E_cmdout_cmdout = Ent_cmdout_cmdout; - hostdata->E_data_transfer = Ent_data_transfer; - hostdata->E_debug_break = Ent_debug_break; - hostdata->E_dsa_code_template = Ent_dsa_code_template; - hostdata->E_dsa_code_template_end = Ent_dsa_code_template_end; - hostdata->E_end_data_transfer = Ent_end_data_transfer; - hostdata->E_initiator_abort = Ent_initiator_abort; - hostdata->E_msg_in = Ent_msg_in; - hostdata->E_other_transfer = Ent_other_transfer; - hostdata->E_other_in = Ent_other_in; - hostdata->E_other_out = Ent_other_out; - hostdata->E_reject_message = Ent_reject_message; - hostdata->E_respond_message = Ent_respond_message; - hostdata->E_select = Ent_select; - hostdata->E_select_msgout = Ent_select_msgout; - hostdata->E_target_abort = Ent_target_abort; -#ifdef Ent_test_0 - hostdata->E_test_0 = Ent_test_0; -#endif - hostdata->E_test_1 = Ent_test_1; - hostdata->E_test_2 = Ent_test_2; -#ifdef Ent_test_3 - hostdata->E_test_3 = Ent_test_3; -#endif - hostdata->E_wait_reselect = Ent_wait_reselect; - hostdata->E_dsa_code_begin = Ent_dsa_code_begin; - - hostdata->dsa_cmdout = A_dsa_cmdout; - hostdata->dsa_cmnd = A_dsa_cmnd; - hostdata->dsa_datain = A_dsa_datain; - hostdata->dsa_dataout = A_dsa_dataout; - hostdata->dsa_end = A_dsa_end; - hostdata->dsa_msgin = A_dsa_msgin; - hostdata->dsa_msgout = A_dsa_msgout; - hostdata->dsa_msgout_other = A_dsa_msgout_other; - hostdata->dsa_next = A_dsa_next; - hostdata->dsa_select = A_dsa_select; - hostdata->dsa_start = Ent_dsa_code_template - Ent_dsa_zero; - hostdata->dsa_status = A_dsa_status; - hostdata->dsa_jump_dest = Ent_dsa_code_fix_jump - Ent_dsa_zero + - 8 /* destination operand */; - - /* sanity check */ - if (A_dsa_fields_start != Ent_dsa_code_template_end - - Ent_dsa_zero) - printk("scsi%d : NCR dsa_fields start is %d not %d\n", - host->host_no, A_dsa_fields_start, Ent_dsa_code_template_end - - Ent_dsa_zero); - - printk("scsi%d : NCR code relocated to 0x%lx (virt 0x%p)\n", host->host_no, - virt_to_bus(hostdata->script), hostdata->script); -} - -/* - * Function : static int NCR53c7xx_run_tests (struct Scsi_Host *host) - * - * Purpose : run various verification tests on the NCR chip, - * including interrupt generation, and proper bus mastering - * operation. - * - * Inputs : host - a properly initialized Scsi_Host structure - * - * Preconditions : the NCR chip must be in a halted state. - * - * Returns : 0 if all tests were successful, -1 on error. - * - */ - -static int -NCR53c7xx_run_tests (struct Scsi_Host *host) { - NCR53c7x0_local_declare(); - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - unsigned long timeout; - u32 start; - int failed, i; - unsigned long flags; - NCR53c7x0_local_setup(host); - - /* The NCR chip _must_ be idle to run the test scripts */ - - local_irq_save(flags); - if (!hostdata->idle) { - printk ("scsi%d : chip not idle, aborting tests\n", host->host_no); - local_irq_restore(flags); - return -1; - } - - /* - * Check for functional interrupts, this could work as an - * autoprobe routine. - */ - - if ((hostdata->options & OPTION_DEBUG_TEST1) && - hostdata->state != STATE_DISABLED) { - hostdata->idle = 0; - hostdata->test_running = 1; - hostdata->test_completed = -1; - hostdata->test_dest = 0; - hostdata->test_source = 0xdeadbeef; - start = virt_to_bus (hostdata->script) + hostdata->E_test_1; - hostdata->state = STATE_RUNNING; - printk ("scsi%d : test 1", host->host_no); - NCR53c7x0_write32 (DSP_REG, start); - if (hostdata->options & OPTION_DEBUG_TRACE) - NCR53c7x0_write8 (DCNTL_REG, hostdata->saved_dcntl | DCNTL_SSM | - DCNTL_STD); - printk (" started\n"); - local_irq_restore(flags); - - /* - * This is currently a .5 second timeout, since (in theory) no slow - * board will take that long. In practice, we've seen one - * pentium which occassionally fails with this, but works with - * 10 times as much? - */ - - timeout = jiffies + 5 * HZ / 10; - while ((hostdata->test_completed == -1) && time_before(jiffies, timeout)) - barrier(); - - failed = 1; - if (hostdata->test_completed == -1) - printk ("scsi%d : driver test 1 timed out%s\n",host->host_no , - (hostdata->test_dest == 0xdeadbeef) ? - " due to lost interrupt.\n" - " Please verify that the correct IRQ is being used for your board,\n" - : ""); - else if (hostdata->test_completed != 1) - printk ("scsi%d : test 1 bad interrupt value (%d)\n", - host->host_no, hostdata->test_completed); - else - failed = (hostdata->test_dest != 0xdeadbeef); - - if (hostdata->test_dest != 0xdeadbeef) { - printk ("scsi%d : driver test 1 read 0x%x instead of 0xdeadbeef indicating a\n" - " probable cache invalidation problem. Please configure caching\n" - " as write-through or disabled\n", - host->host_no, hostdata->test_dest); - } - - if (failed) { - printk ("scsi%d : DSP = 0x%p (script at 0x%p, start at 0x%x)\n", - host->host_no, bus_to_virt(NCR53c7x0_read32(DSP_REG)), - hostdata->script, start); - printk ("scsi%d : DSPS = 0x%x\n", host->host_no, - NCR53c7x0_read32(DSPS_REG)); - local_irq_restore(flags); - return -1; - } - hostdata->test_running = 0; - } - - if ((hostdata->options & OPTION_DEBUG_TEST2) && - hostdata->state != STATE_DISABLED) { - u32 dsa[48]; - unsigned char identify = IDENTIFY(0, 0); - unsigned char cmd[6]; - unsigned char data[36]; - unsigned char status = 0xff; - unsigned char msg = 0xff; - - cmd[0] = INQUIRY; - cmd[1] = cmd[2] = cmd[3] = cmd[5] = 0; - cmd[4] = sizeof(data); - - dsa[2] = 1; - dsa[3] = virt_to_bus(&identify); - dsa[4] = 6; - dsa[5] = virt_to_bus(&cmd); - dsa[6] = sizeof(data); - dsa[7] = virt_to_bus(&data); - dsa[8] = 1; - dsa[9] = virt_to_bus(&status); - dsa[10] = 1; - dsa[11] = virt_to_bus(&msg); - - for (i = 0; i < 6; ++i) { -#ifdef VALID_IDS - if (!hostdata->valid_ids[i]) - continue; -#endif - local_irq_disable(); - if (!hostdata->idle) { - printk ("scsi%d : chip not idle, aborting tests\n", host->host_no); - local_irq_restore(flags); - return -1; - } - - /* 710: bit mapped scsi ID, async */ - dsa[0] = (1 << i) << 16; - hostdata->idle = 0; - hostdata->test_running = 2; - hostdata->test_completed = -1; - start = virt_to_bus(hostdata->script) + hostdata->E_test_2; - hostdata->state = STATE_RUNNING; - NCR53c7x0_write32 (DSA_REG, virt_to_bus(dsa)); - NCR53c7x0_write32 (DSP_REG, start); - if (hostdata->options & OPTION_DEBUG_TRACE) - NCR53c7x0_write8 (DCNTL_REG, hostdata->saved_dcntl | - DCNTL_SSM | DCNTL_STD); - local_irq_restore(flags); - - timeout = jiffies + 5 * HZ; /* arbitrary */ - while ((hostdata->test_completed == -1) && time_before(jiffies, timeout)) - barrier(); - - NCR53c7x0_write32 (DSA_REG, 0); - - if (hostdata->test_completed == 2) { - data[35] = 0; - printk ("scsi%d : test 2 INQUIRY to target %d, lun 0 : %s\n", - host->host_no, i, data + 8); - printk ("scsi%d : status ", host->host_no); - scsi_print_status (status); - printk ("\nscsi%d : message ", host->host_no); - spi_print_msg(&msg); - printk ("\n"); - } else if (hostdata->test_completed == 3) { - printk("scsi%d : test 2 no connection with target %d\n", - host->host_no, i); - if (!hostdata->idle) { - printk("scsi%d : not idle\n", host->host_no); - local_irq_restore(flags); - return -1; - } - } else if (hostdata->test_completed == -1) { - printk ("scsi%d : test 2 timed out\n", host->host_no); - local_irq_restore(flags); - return -1; - } - hostdata->test_running = 0; - } - } - - local_irq_restore(flags); - return 0; -} - -/* - * Function : static void NCR53c7xx_dsa_fixup (struct NCR53c7x0_cmd *cmd) - * - * Purpose : copy the NCR53c8xx dsa structure into cmd's dsa buffer, - * performing all necessary relocation. - * - * Inputs : cmd, a NCR53c7x0_cmd structure with a dsa area large - * enough to hold the NCR53c8xx dsa. - */ - -static void -NCR53c7xx_dsa_fixup (struct NCR53c7x0_cmd *cmd) { - Scsi_Cmnd *c = cmd->cmd; - struct Scsi_Host *host = c->device->host; - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - int i; - - memcpy (cmd->dsa, hostdata->script + (hostdata->E_dsa_code_template / 4), - hostdata->E_dsa_code_template_end - hostdata->E_dsa_code_template); - - /* - * Note : within the NCR 'C' code, dsa points to the _start_ - * of the DSA structure, and _not_ the offset of dsa_zero within - * that structure used to facilitate shorter signed offsets - * for the 8 bit ALU. - * - * The implications of this are that - * - * - 32 bit A_dsa_* absolute values require an additional - * dsa_zero added to their value to be correct, since they are - * relative to dsa_zero which is in essentially a separate - * space from the code symbols. - * - * - All other symbols require no special treatment. - */ - - patch_abs_tci_data (cmd->dsa, Ent_dsa_code_template / sizeof(u32), - dsa_temp_lun, c->device->lun); - patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), - dsa_temp_addr_next, virt_to_bus(&cmd->dsa_next_addr)); - patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), - dsa_temp_next, virt_to_bus(cmd->dsa) + Ent_dsa_zero - - Ent_dsa_code_template + A_dsa_next); - patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), - dsa_temp_sync, virt_to_bus((void *)hostdata->sync[c->device->id].script)); - patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), - dsa_sscf_710, virt_to_bus((void *)&hostdata->sync[c->device->id].sscf_710)); - patch_abs_tci_data (cmd->dsa, Ent_dsa_code_template / sizeof(u32), - dsa_temp_target, 1 << c->device->id); - /* XXX - new pointer stuff */ - patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), - dsa_temp_addr_saved_pointer, virt_to_bus(&cmd->saved_data_pointer)); - patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), - dsa_temp_addr_saved_residual, virt_to_bus(&cmd->saved_residual)); - patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), - dsa_temp_addr_residual, virt_to_bus(&cmd->residual)); - - /* XXX - new start stuff */ - - patch_abs_32 (cmd->dsa, Ent_dsa_code_template / sizeof(u32), - dsa_temp_addr_dsa_value, virt_to_bus(&cmd->dsa_addr)); -} - -/* - * Function : run_process_issue_queue (void) - * - * Purpose : insure that the coroutine is running and will process our - * request. process_issue_queue_running is checked/set here (in an - * inline function) rather than in process_issue_queue itself to reduce - * the chances of stack overflow. - * - */ - -static volatile int process_issue_queue_running = 0; - -static __inline__ void -run_process_issue_queue(void) { - unsigned long flags; - local_irq_save(flags); - if (!process_issue_queue_running) { - process_issue_queue_running = 1; - process_issue_queue(flags); - /* - * process_issue_queue_running is cleared in process_issue_queue - * once it can't do more work, and process_issue_queue exits with - * interrupts disabled. - */ - } - local_irq_restore(flags); -} - -/* - * Function : static void abnormal_finished (struct NCR53c7x0_cmd *cmd, int - * result) - * - * Purpose : mark SCSI command as finished, OR'ing the host portion - * of the result word into the result field of the corresponding - * Scsi_Cmnd structure, and removing it from the internal queues. - * - * Inputs : cmd - command, result - entire result field - * - * Preconditions : the NCR chip should be in a halted state when - * abnormal_finished is run, since it modifies structures which - * the NCR expects to have exclusive access to. - */ - -static void -abnormal_finished (struct NCR53c7x0_cmd *cmd, int result) { - Scsi_Cmnd *c = cmd->cmd; - struct Scsi_Host *host = c->device->host; - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - unsigned long flags; - int left, found; - volatile struct NCR53c7x0_cmd * linux_search; - volatile struct NCR53c7x0_cmd * volatile *linux_prev; - volatile u32 *ncr_prev, *ncrcurrent, ncr_search; - -#if 0 - printk ("scsi%d: abnormal finished\n", host->host_no); -#endif - - local_irq_save(flags); - found = 0; - /* - * Traverse the NCR issue array until we find a match or run out - * of instructions. Instructions in the NCR issue array are - * either JUMP or NOP instructions, which are 2 words in length. - */ - - - for (found = 0, left = host->can_queue, ncrcurrent = hostdata->schedule; - left > 0; --left, ncrcurrent += 2) - { - if (issue_to_cmd (host, hostdata, (u32 *) ncrcurrent) == cmd) - { - ncrcurrent[0] = hostdata->NOP_insn; - ncrcurrent[1] = 0xdeadbeef; - ++found; - break; - } - } - - /* - * Traverse the NCR reconnect list of DSA structures until we find - * a pointer to this dsa or have found too many command structures. - * We let prev point at the next field of the previous element or - * head of the list, so we don't do anything different for removing - * the head element. - */ - - for (left = host->can_queue, - ncr_search = hostdata->reconnect_dsa_head, - ncr_prev = &hostdata->reconnect_dsa_head; - left >= 0 && ncr_search && - ((char*)bus_to_virt(ncr_search) + hostdata->dsa_start) - != (char *) cmd->dsa; - ncr_prev = (u32*) ((char*)bus_to_virt(ncr_search) + - hostdata->dsa_next), ncr_search = *ncr_prev, --left); - - if (left < 0) - printk("scsi%d: loop detected in ncr reconncect list\n", - host->host_no); - else if (ncr_search) { - if (found) - printk("scsi%d: scsi %ld in ncr issue array and reconnect lists\n", - host->host_no, c->pid); - else { - volatile u32 * next = (u32 *) - ((char *)bus_to_virt(ncr_search) + hostdata->dsa_next); - *ncr_prev = *next; -/* If we're at the tail end of the issue queue, update that pointer too. */ - found = 1; - } - } - - /* - * Traverse the host running list until we find this command or discover - * we have too many elements, pointing linux_prev at the next field of the - * linux_previous element or head of the list, search at this element. - */ - - for (left = host->can_queue, linux_search = hostdata->running_list, - linux_prev = &hostdata->running_list; - left >= 0 && linux_search && linux_search != cmd; - linux_prev = &(linux_search->next), - linux_search = linux_search->next, --left); - - if (left < 0) - printk ("scsi%d: loop detected in host running list for scsi pid %ld\n", - host->host_no, c->pid); - else if (linux_search) { - *linux_prev = linux_search->next; - --hostdata->busy[c->device->id][c->device->lun]; - } - - /* Return the NCR command structure to the free list */ - cmd->next = hostdata->free; - hostdata->free = cmd; - c->host_scribble = NULL; - - /* And return */ - c->result = result; - c->scsi_done(c); - - local_irq_restore(flags); - run_process_issue_queue(); -} - -/* - * Function : static void intr_break (struct Scsi_Host *host, - * struct NCR53c7x0_cmd *cmd) - * - * Purpose : Handler for breakpoint interrupts from a SCSI script - * - * Inputs : host - pointer to this host adapter's structure, - * cmd - pointer to the command (if any) dsa was pointing - * to. - * - */ - -static void -intr_break (struct Scsi_Host *host, struct - NCR53c7x0_cmd *cmd) { - NCR53c7x0_local_declare(); - struct NCR53c7x0_break *bp; -#if 0 - Scsi_Cmnd *c = cmd ? cmd->cmd : NULL; -#endif - u32 *dsp; - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - unsigned long flags; - NCR53c7x0_local_setup(host); - - /* - * Find the break point corresponding to this address, and - * dump the appropriate debugging information to standard - * output. - */ - local_irq_save(flags); - dsp = (u32 *) bus_to_virt(NCR53c7x0_read32(DSP_REG)); - for (bp = hostdata->breakpoints; bp && bp->address != dsp; - bp = bp->next); - if (!bp) - panic("scsi%d : break point interrupt from %p with no breakpoint!", - host->host_no, dsp); - - /* - * Configure the NCR chip for manual start mode, so that we can - * point the DSP register at the instruction that follows the - * INT int_debug_break instruction. - */ - - NCR53c7x0_write8 (hostdata->dmode, - NCR53c7x0_read8(hostdata->dmode)|DMODE_MAN); - - /* - * And update the DSP register, using the size of the old - * instruction in bytes. - */ - - local_irq_restore(flags); -} -/* - * Function : static void print_synchronous (const char *prefix, - * const unsigned char *msg) - * - * Purpose : print a pretty, user and machine parsable representation - * of a SDTR message, including the "real" parameters, data - * clock so we can tell transfer rate at a glance. - * - * Inputs ; prefix - text to prepend, msg - SDTR message (5 bytes) - */ - -static void -print_synchronous (const char *prefix, const unsigned char *msg) { - if (msg[4]) { - int Hz = 1000000000 / (msg[3] * 4); - int integer = Hz / 1000000; - int fraction = (Hz - (integer * 1000000)) / 10000; - printk ("%speriod %dns offset %d %d.%02dMHz %s SCSI%s\n", - prefix, (int) msg[3] * 4, (int) msg[4], integer, fraction, - (((msg[3] * 4) < 200) ? "FAST" : "synchronous"), - (((msg[3] * 4) < 200) ? "-II" : "")); - } else - printk ("%sasynchronous SCSI\n", prefix); -} - -/* - * Function : static void set_synchronous (struct Scsi_Host *host, - * int target, int sxfer, int scntl3, int now_connected) - * - * Purpose : reprogram transfers between the selected SCSI initiator and - * target with the given register values; in the indirect - * select operand, reselection script, and chip registers. - * - * Inputs : host - NCR53c7,8xx SCSI host, target - number SCSI target id, - * sxfer and scntl3 - NCR registers. now_connected - if non-zero, - * we should reprogram the registers now too. - * - * NOTE: For 53c710, scntl3 is actually used for SCF bits from - * SBCL, as we don't have a SCNTL3. - */ - -static void -set_synchronous (struct Scsi_Host *host, int target, int sxfer, int scntl3, - int now_connected) { - NCR53c7x0_local_declare(); - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - u32 *script; - NCR53c7x0_local_setup(host); - - /* These are eight bit registers */ - sxfer &= 0xff; - scntl3 &= 0xff; - - hostdata->sync[target].sxfer_sanity = sxfer; - hostdata->sync[target].scntl3_sanity = scntl3; - -/* - * HARD CODED : synchronous script is EIGHT words long. This - * must agree with 53c7.8xx.h - */ - - if ((hostdata->chip != 700) && (hostdata->chip != 70066)) { - hostdata->sync[target].select_indirect = (1 << target) << 16 | - (sxfer << 8); - hostdata->sync[target].sscf_710 = scntl3; - - script = (u32 *) hostdata->sync[target].script; - - /* XXX - add NCR53c7x0 code to reprogram SCF bits if we want to */ - script[0] = ((DCMD_TYPE_RWRI | DCMD_RWRI_OPC_MODIFY | - DCMD_RWRI_OP_MOVE) << 24) | - (SBCL_REG << 16) | (scntl3 << 8); - script[1] = 0; - script += 2; - - script[0] = ((DCMD_TYPE_RWRI | DCMD_RWRI_OPC_MODIFY | - DCMD_RWRI_OP_MOVE) << 24) | - (SXFER_REG << 16) | (sxfer << 8); - script[1] = 0; - script += 2; - -#ifdef DEBUG_SYNC_INTR - if (hostdata->options & OPTION_DEBUG_DISCONNECT) { - script[0] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_INT) << 24) | DBC_TCI_TRUE; - script[1] = DEBUG_SYNC_INTR; - script += 2; - } -#endif - - script[0] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_RETURN) << 24) | DBC_TCI_TRUE; - script[1] = 0; - script += 2; - } - - if (hostdata->options & OPTION_DEBUG_SYNCHRONOUS) - printk ("scsi%d : target %d sync parameters are sxfer=0x%x, scntl3=0x%x\n", - host->host_no, target, sxfer, scntl3); - - if (now_connected) { - NCR53c7x0_write8(SBCL_REG, scntl3); - NCR53c7x0_write8(SXFER_REG, sxfer); - } -} - - -/* - * Function : static int asynchronous (struct Scsi_Host *host, int target) - * - * Purpose : reprogram between the selected SCSI Host adapter and target - * (assumed to be currently connected) for asynchronous transfers. - * - * Inputs : host - SCSI host structure, target - numeric target ID. - * - * Preconditions : the NCR chip should be in one of the halted states - */ - -static void -asynchronous (struct Scsi_Host *host, int target) { - NCR53c7x0_local_declare(); - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - NCR53c7x0_local_setup(host); - set_synchronous (host, target, /* no offset */ 0, hostdata->saved_scntl3, - 1); - printk ("scsi%d : setting target %d to asynchronous SCSI\n", - host->host_no, target); -} - -/* - * XXX - do we want to go out of our way (ie, add extra code to selection - * in the NCR53c710/NCR53c720 script) to reprogram the synchronous - * conversion bits, or can we be content in just setting the - * sxfer bits? I chose to do so [richard@sleepie.demon.co.uk] - */ - -/* Table for NCR53c8xx synchronous values */ - -/* This table is also correct for 710, allowing that scf=4 is equivalent - * of SSCF=0 (ie use DCNTL, divide by 3) for a 50.01-66.00MHz clock. - * For any other clock values, we cannot use entries with SCF values of - * 4. I guess that for a 66MHz clock, the slowest it will set is 2MHz, - * and for a 50MHz clock, the slowest will be 2.27Mhz. Should check - * that a device doesn't try and negotiate sync below these limits! - */ - -static const struct { - int div; /* Total clock divisor * 10 */ - unsigned char scf; /* */ - unsigned char tp; /* 4 + tp = xferp divisor */ -} syncs[] = { -/* div scf tp div scf tp div scf tp */ - { 40, 1, 0}, { 50, 1, 1}, { 60, 1, 2}, - { 70, 1, 3}, { 75, 2, 1}, { 80, 1, 4}, - { 90, 1, 5}, { 100, 1, 6}, { 105, 2, 3}, - { 110, 1, 7}, { 120, 2, 4}, { 135, 2, 5}, - { 140, 3, 3}, { 150, 2, 6}, { 160, 3, 4}, - { 165, 2, 7}, { 180, 3, 5}, { 200, 3, 6}, - { 210, 4, 3}, { 220, 3, 7}, { 240, 4, 4}, - { 270, 4, 5}, { 300, 4, 6}, { 330, 4, 7} -}; - -/* - * Function : static void synchronous (struct Scsi_Host *host, int target, - * char *msg) - * - * Purpose : reprogram transfers between the selected SCSI initiator and - * target for synchronous SCSI transfers such that the synchronous - * offset is less than that requested and period at least as long - * as that requested. Also modify *msg such that it contains - * an appropriate response. - * - * Inputs : host - NCR53c7,8xx SCSI host, target - number SCSI target id, - * msg - synchronous transfer request. - */ - - -static void -synchronous (struct Scsi_Host *host, int target, char *msg) { - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - int desire, divisor, i, limit; - unsigned char scntl3, sxfer; -/* The diagnostic message fits on one line, even with max. width integers */ - char buf[80]; - -/* Desired transfer clock in Hz */ - desire = 1000000000L / (msg[3] * 4); -/* Scale the available SCSI clock by 10 so we get tenths */ - divisor = (hostdata->scsi_clock * 10) / desire; - -/* NCR chips can handle at most an offset of 8 */ - if (msg[4] > 8) - msg[4] = 8; - - if (hostdata->options & OPTION_DEBUG_SDTR) - printk("scsi%d : optimal synchronous divisor of %d.%01d\n", - host->host_no, divisor / 10, divisor % 10); - - limit = ARRAY_SIZE(syncs) - 1; - for (i = 0; (i < limit) && (divisor > syncs[i].div); ++i); - - if (hostdata->options & OPTION_DEBUG_SDTR) - printk("scsi%d : selected synchronous divisor of %d.%01d\n", - host->host_no, syncs[i].div / 10, syncs[i].div % 10); - - msg[3] = ((1000000000L / hostdata->scsi_clock) * syncs[i].div / 10 / 4); - - if (hostdata->options & OPTION_DEBUG_SDTR) - printk("scsi%d : selected synchronous period of %dns\n", host->host_no, - msg[3] * 4); - - scntl3 = syncs[i].scf; - sxfer = (msg[4] << SXFER_MO_SHIFT) | (syncs[i].tp << 4); - if (hostdata->options & OPTION_DEBUG_SDTR) - printk ("scsi%d : sxfer=0x%x scntl3=0x%x\n", - host->host_no, (int) sxfer, (int) scntl3); - set_synchronous (host, target, sxfer, scntl3, 1); - sprintf (buf, "scsi%d : setting target %d to ", host->host_no, target); - print_synchronous (buf, msg); -} - -/* - * Function : static int NCR53c7x0_dstat_sir_intr (struct Scsi_Host *host, - * struct NCR53c7x0_cmd *cmd) - * - * Purpose : Handler for INT generated instructions for the - * NCR53c810/820 SCSI SCRIPT - * - * Inputs : host - pointer to this host adapter's structure, - * cmd - pointer to the command (if any) dsa was pointing - * to. - * - */ - -static int -NCR53c7x0_dstat_sir_intr (struct Scsi_Host *host, struct - NCR53c7x0_cmd *cmd) { - NCR53c7x0_local_declare(); - int print; - Scsi_Cmnd *c = cmd ? cmd->cmd : NULL; - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - u32 dsps,*dsp; /* Argument of the INT instruction */ - - NCR53c7x0_local_setup(host); - dsps = NCR53c7x0_read32(DSPS_REG); - dsp = (u32 *) bus_to_virt(NCR53c7x0_read32(DSP_REG)); - - /* RGH 150597: Frig. Commands which fail with Check Condition are - * Flagged as successful - hack dsps to indicate check condition */ -#if 0 - /* RGH 200597: Need to disable for BVME6000, as it gets Check Conditions - * and then dies. Seems to handle Check Condition at startup, but - * not mid kernel build. */ - if (dsps == A_int_norm_emulateintfly && cmd && cmd->result == 2) - dsps = A_int_err_check_condition; -#endif - - if (hostdata->options & OPTION_DEBUG_INTR) - printk ("scsi%d : DSPS = 0x%x\n", host->host_no, dsps); - - switch (dsps) { - case A_int_msg_1: - print = 1; - switch (hostdata->msg_buf[0]) { - /* - * Unless we've initiated synchronous negotiation, I don't - * think that this should happen. - */ - case MESSAGE_REJECT: - hostdata->dsp = hostdata->script + hostdata->E_accept_message / - sizeof(u32); - hostdata->dsp_changed = 1; - if (cmd && (cmd->flags & CMD_FLAG_SDTR)) { - printk ("scsi%d : target %d rejected SDTR\n", host->host_no, - c->device->id); - cmd->flags &= ~CMD_FLAG_SDTR; - asynchronous (host, c->device->id); - print = 0; - } - break; - case INITIATE_RECOVERY: - printk ("scsi%d : extended contingent allegiance not supported yet, rejecting\n", - host->host_no); - /* Fall through to default */ - hostdata->dsp = hostdata->script + hostdata->E_reject_message / - sizeof(u32); - hostdata->dsp_changed = 1; - break; - default: - printk ("scsi%d : unsupported message, rejecting\n", - host->host_no); - hostdata->dsp = hostdata->script + hostdata->E_reject_message / - sizeof(u32); - hostdata->dsp_changed = 1; - } - if (print) { - printk ("scsi%d : received message", host->host_no); - if (c) - printk (" from target %d lun %d ", c->device->id, c->device->lun); - spi_print_msg((unsigned char *) hostdata->msg_buf); - printk("\n"); - } - - return SPECIFIC_INT_NOTHING; - - - case A_int_msg_sdtr: -/* - * At this point, hostdata->msg_buf contains - * 0 EXTENDED MESSAGE - * 1 length - * 2 SDTR - * 3 period * 4ns - * 4 offset - */ - - if (cmd) { - char buf[80]; - sprintf (buf, "scsi%d : target %d %s ", host->host_no, c->device->id, - (cmd->flags & CMD_FLAG_SDTR) ? "accepting" : "requesting"); - print_synchronous (buf, (unsigned char *) hostdata->msg_buf); - - /* - * Initiator initiated, won't happen unless synchronous - * transfers are enabled. If we get a SDTR message in - * response to our SDTR, we should program our parameters - * such that - * offset <= requested offset - * period >= requested period - */ - if (cmd->flags & CMD_FLAG_SDTR) { - cmd->flags &= ~CMD_FLAG_SDTR; - if (hostdata->msg_buf[4]) - synchronous (host, c->device->id, (unsigned char *) - hostdata->msg_buf); - else - asynchronous (host, c->device->id); - hostdata->dsp = hostdata->script + hostdata->E_accept_message / - sizeof(u32); - hostdata->dsp_changed = 1; - return SPECIFIC_INT_NOTHING; - } else { - if (hostdata->options & OPTION_SYNCHRONOUS) { - cmd->flags |= CMD_FLAG_DID_SDTR; - synchronous (host, c->device->id, (unsigned char *) - hostdata->msg_buf); - } else { - hostdata->msg_buf[4] = 0; /* 0 offset = async */ - asynchronous (host, c->device->id); - } - patch_dsa_32 (cmd->dsa, dsa_msgout_other, 0, 5); - patch_dsa_32 (cmd->dsa, dsa_msgout_other, 1, (u32) - virt_to_bus ((void *)&hostdata->msg_buf)); - hostdata->dsp = hostdata->script + - hostdata->E_respond_message / sizeof(u32); - hostdata->dsp_changed = 1; - } - return SPECIFIC_INT_NOTHING; - } - /* Fall through to abort if we couldn't find a cmd, and - therefore a dsa structure to twiddle */ - case A_int_msg_wdtr: - hostdata->dsp = hostdata->script + hostdata->E_reject_message / - sizeof(u32); - hostdata->dsp_changed = 1; - return SPECIFIC_INT_NOTHING; - case A_int_err_unexpected_phase: - if (hostdata->options & OPTION_DEBUG_INTR) - printk ("scsi%d : unexpected phase\n", host->host_no); - return SPECIFIC_INT_ABORT; - case A_int_err_selected: - if ((hostdata->chip / 100) == 8) - printk ("scsi%d : selected by target %d\n", host->host_no, - (int) NCR53c7x0_read8(SDID_REG_800) &7); - else - printk ("scsi%d : selected by target LCRC=0x%02x\n", host->host_no, - (int) NCR53c7x0_read8(LCRC_REG_10)); - hostdata->dsp = hostdata->script + hostdata->E_target_abort / - sizeof(u32); - hostdata->dsp_changed = 1; - return SPECIFIC_INT_NOTHING; - case A_int_err_unexpected_reselect: - if ((hostdata->chip / 100) == 8) - printk ("scsi%d : unexpected reselect by target %d lun %d\n", - host->host_no, (int) NCR53c7x0_read8(SDID_REG_800) & 7, - hostdata->reselected_identify & 7); - else - printk ("scsi%d : unexpected reselect LCRC=0x%02x\n", host->host_no, - (int) NCR53c7x0_read8(LCRC_REG_10)); - hostdata->dsp = hostdata->script + hostdata->E_initiator_abort / - sizeof(u32); - hostdata->dsp_changed = 1; - return SPECIFIC_INT_NOTHING; -/* - * Since contingent allegiance conditions are cleared by the next - * command issued to a target, we must issue a REQUEST SENSE - * command after receiving a CHECK CONDITION status, before - * another command is issued. - * - * Since this NCR53c7x0_cmd will be freed after use, we don't - * care if we step on the various fields, so modify a few things. - */ - case A_int_err_check_condition: -#if 0 - if (hostdata->options & OPTION_DEBUG_INTR) -#endif - printk ("scsi%d : CHECK CONDITION\n", host->host_no); - if (!c) { - printk("scsi%d : CHECK CONDITION with no SCSI command\n", - host->host_no); - return SPECIFIC_INT_PANIC; - } - - /* - * FIXME : this uses the normal one-byte selection message. - * We may want to renegotiate for synchronous & WIDE transfers - * since these could be the crux of our problem. - * - hostdata->NOP_insn* FIXME : once SCSI-II tagged queuing is implemented, we'll - * have to set this up so that the rest of the DSA - * agrees with this being an untagged queue'd command. - */ - - patch_dsa_32 (cmd->dsa, dsa_msgout, 0, 1); - - /* - * Modify the table indirect for COMMAND OUT phase, since - * Request Sense is a six byte command. - */ - - patch_dsa_32 (cmd->dsa, dsa_cmdout, 0, 6); - - /* - * The CDB is now mirrored in our local non-cached - * structure, but keep the old structure up to date as well, - * just in case anyone looks at it. - */ - - /* - * XXX Need to worry about data buffer alignment/cache state - * XXX here, but currently never get A_int_err_check_condition, - * XXX so ignore problem for now. - */ - cmd->cmnd[0] = c->cmnd[0] = REQUEST_SENSE; - cmd->cmnd[0] = c->cmnd[1] &= 0xe0; /* Zero all but LUN */ - cmd->cmnd[0] = c->cmnd[2] = 0; - cmd->cmnd[0] = c->cmnd[3] = 0; - cmd->cmnd[0] = c->cmnd[4] = sizeof(c->sense_buffer); - cmd->cmnd[0] = c->cmnd[5] = 0; - - /* - * Disable dataout phase, and program datain to transfer to the - * sense buffer, and add a jump to other_transfer after the - * command so overflow/underrun conditions are detected. - */ - - patch_dsa_32 (cmd->dsa, dsa_dataout, 0, - virt_to_bus(hostdata->script) + hostdata->E_other_transfer); - patch_dsa_32 (cmd->dsa, dsa_datain, 0, - virt_to_bus(cmd->data_transfer_start)); - cmd->data_transfer_start[0] = (((DCMD_TYPE_BMI | DCMD_BMI_OP_MOVE_I | - DCMD_BMI_IO)) << 24) | sizeof(c->sense_buffer); - cmd->data_transfer_start[1] = (u32) virt_to_bus(c->sense_buffer); - - cmd->data_transfer_start[2] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_JUMP) - << 24) | DBC_TCI_TRUE; - cmd->data_transfer_start[3] = (u32) virt_to_bus(hostdata->script) + - hostdata->E_other_transfer; - - /* - * Currently, this command is flagged as completed, ie - * it has valid status and message data. Reflag it as - * incomplete. Q - need to do something so that original - * status, etc are used. - */ - - cmd->result = cmd->cmd->result = 0xffff; - - /* - * Restart command as a REQUEST SENSE. - */ - hostdata->dsp = (u32 *) hostdata->script + hostdata->E_select / - sizeof(u32); - hostdata->dsp_changed = 1; - return SPECIFIC_INT_NOTHING; - case A_int_debug_break: - return SPECIFIC_INT_BREAK; - case A_int_norm_aborted: - hostdata->dsp = (u32 *) hostdata->schedule; - hostdata->dsp_changed = 1; - if (cmd) - abnormal_finished (cmd, DID_ERROR << 16); - return SPECIFIC_INT_NOTHING; - case A_int_norm_emulateintfly: - NCR53c7x0_intfly(host); - return SPECIFIC_INT_NOTHING; - case A_int_test_1: - case A_int_test_2: - hostdata->idle = 1; - hostdata->test_completed = (dsps - A_int_test_1) / 0x00010000 + 1; - if (hostdata->options & OPTION_DEBUG_INTR) - printk("scsi%d : test%d complete\n", host->host_no, - hostdata->test_completed); - return SPECIFIC_INT_NOTHING; -#ifdef A_int_debug_reselected_ok - case A_int_debug_reselected_ok: - if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR| - OPTION_DEBUG_DISCONNECT)) { - /* - * Note - this dsa is not based on location relative to - * the command structure, but to location relative to the - * DSA register - */ - u32 *dsa; - dsa = (u32 *) bus_to_virt (NCR53c7x0_read32(DSA_REG)); - - printk("scsi%d : reselected_ok (DSA = 0x%x (virt 0x%p)\n", - host->host_no, NCR53c7x0_read32(DSA_REG), dsa); - printk("scsi%d : resume address is 0x%x (virt 0x%p)\n", - host->host_no, cmd->saved_data_pointer, - bus_to_virt(cmd->saved_data_pointer)); - print_insn (host, hostdata->script + Ent_reselected_ok / - sizeof(u32), "", 1); - if ((hostdata->chip / 100) == 8) - printk ("scsi%d : sxfer=0x%x, scntl3=0x%x\n", - host->host_no, NCR53c7x0_read8(SXFER_REG), - NCR53c7x0_read8(SCNTL3_REG_800)); - else - printk ("scsi%d : sxfer=0x%x, cannot read SBCL\n", - host->host_no, NCR53c7x0_read8(SXFER_REG)); - if (c) { - print_insn (host, (u32 *) - hostdata->sync[c->device->id].script, "", 1); - print_insn (host, (u32 *) - hostdata->sync[c->device->id].script + 2, "", 1); - } - } - return SPECIFIC_INT_RESTART; -#endif -#ifdef A_int_debug_reselect_check - case A_int_debug_reselect_check: - if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) { - u32 *dsa; -#if 0 - u32 *code; -#endif - /* - * Note - this dsa is not based on location relative to - * the command structure, but to location relative to the - * DSA register - */ - dsa = bus_to_virt (NCR53c7x0_read32(DSA_REG)); - printk("scsi%d : reselected_check_next (DSA = 0x%lx (virt 0x%p))\n", - host->host_no, virt_to_bus(dsa), dsa); - if (dsa) { - printk("scsi%d : resume address is 0x%x (virt 0x%p)\n", - host->host_no, cmd->saved_data_pointer, - bus_to_virt (cmd->saved_data_pointer)); -#if 0 - printk("scsi%d : template code :\n", host->host_no); - for (code = dsa + (Ent_dsa_code_check_reselect - Ent_dsa_zero) - / sizeof(u32); code < (dsa + Ent_dsa_zero / sizeof(u32)); - code += print_insn (host, code, "", 1)); -#endif - } - print_insn (host, hostdata->script + Ent_reselected_ok / - sizeof(u32), "", 1); - } - return SPECIFIC_INT_RESTART; -#endif -#ifdef A_int_debug_dsa_schedule - case A_int_debug_dsa_schedule: - if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) { - u32 *dsa; - /* - * Note - this dsa is not based on location relative to - * the command structure, but to location relative to the - * DSA register - */ - dsa = (u32 *) bus_to_virt (NCR53c7x0_read32(DSA_REG)); - printk("scsi%d : dsa_schedule (old DSA = 0x%lx (virt 0x%p))\n", - host->host_no, virt_to_bus(dsa), dsa); - if (dsa) - printk("scsi%d : resume address is 0x%x (virt 0x%p)\n" - " (temp was 0x%x (virt 0x%p))\n", - host->host_no, cmd->saved_data_pointer, - bus_to_virt (cmd->saved_data_pointer), - NCR53c7x0_read32 (TEMP_REG), - bus_to_virt (NCR53c7x0_read32(TEMP_REG))); - } - return SPECIFIC_INT_RESTART; -#endif -#ifdef A_int_debug_scheduled - case A_int_debug_scheduled: - if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) { - printk("scsi%d : new I/O 0x%x (virt 0x%p) scheduled\n", - host->host_no, NCR53c7x0_read32(DSA_REG), - bus_to_virt(NCR53c7x0_read32(DSA_REG))); - } - return SPECIFIC_INT_RESTART; -#endif -#ifdef A_int_debug_idle - case A_int_debug_idle: - if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) { - printk("scsi%d : idle\n", host->host_no); - } - return SPECIFIC_INT_RESTART; -#endif -#ifdef A_int_debug_cmd - case A_int_debug_cmd: - if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) { - printk("scsi%d : command sent\n"); - } - return SPECIFIC_INT_RESTART; -#endif -#ifdef A_int_debug_dsa_loaded - case A_int_debug_dsa_loaded: - if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) { - printk("scsi%d : DSA loaded with 0x%x (virt 0x%p)\n", host->host_no, - NCR53c7x0_read32(DSA_REG), - bus_to_virt(NCR53c7x0_read32(DSA_REG))); - } - return SPECIFIC_INT_RESTART; -#endif -#ifdef A_int_debug_reselected - case A_int_debug_reselected: - if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR| - OPTION_DEBUG_DISCONNECT)) { - if ((hostdata->chip / 100) == 8) - printk("scsi%d : reselected by target %d lun %d\n", - host->host_no, (int) NCR53c7x0_read8(SDID_REG_800) & ~0x80, - (int) hostdata->reselected_identify & 7); - else - printk("scsi%d : reselected by LCRC=0x%02x lun %d\n", - host->host_no, (int) NCR53c7x0_read8(LCRC_REG_10), - (int) hostdata->reselected_identify & 7); - print_queues(host); - } - return SPECIFIC_INT_RESTART; -#endif -#ifdef A_int_debug_disconnect_msg - case A_int_debug_disconnect_msg: - if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR)) { - if (c) - printk("scsi%d : target %d lun %d disconnecting\n", - host->host_no, c->device->id, c->device->lun); - else - printk("scsi%d : unknown target disconnecting\n", - host->host_no); - } - return SPECIFIC_INT_RESTART; -#endif -#ifdef A_int_debug_disconnected - case A_int_debug_disconnected: - if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR| - OPTION_DEBUG_DISCONNECT)) { - printk ("scsi%d : disconnected, new queues are\n", - host->host_no); - print_queues(host); -#if 0 - /* Not valid on ncr53c710! */ - printk ("scsi%d : sxfer=0x%x, scntl3=0x%x\n", - host->host_no, NCR53c7x0_read8(SXFER_REG), - NCR53c7x0_read8(SCNTL3_REG_800)); -#endif - if (c) { - print_insn (host, (u32 *) - hostdata->sync[c->device->id].script, "", 1); - print_insn (host, (u32 *) - hostdata->sync[c->device->id].script + 2, "", 1); - } - } - return SPECIFIC_INT_RESTART; -#endif -#ifdef A_int_debug_panic - case A_int_debug_panic: - printk("scsi%d : int_debug_panic received\n", host->host_no); - print_lots (host); - return SPECIFIC_INT_PANIC; -#endif -#ifdef A_int_debug_saved - case A_int_debug_saved: - if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR| - OPTION_DEBUG_DISCONNECT)) { - printk ("scsi%d : saved data pointer 0x%x (virt 0x%p)\n", - host->host_no, cmd->saved_data_pointer, - bus_to_virt (cmd->saved_data_pointer)); - print_progress (c); - } - return SPECIFIC_INT_RESTART; -#endif -#ifdef A_int_debug_restored - case A_int_debug_restored: - if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR| - OPTION_DEBUG_DISCONNECT)) { - if (cmd) { - int size; - printk ("scsi%d : restored data pointer 0x%x (virt 0x%p)\n", - host->host_no, cmd->saved_data_pointer, bus_to_virt ( - cmd->saved_data_pointer)); - size = print_insn (host, (u32 *) - bus_to_virt(cmd->saved_data_pointer), "", 1); - size = print_insn (host, (u32 *) - bus_to_virt(cmd->saved_data_pointer) + size, "", 1); - print_progress (c); - } -#if 0 - printk ("scsi%d : datapath residual %d\n", - host->host_no, datapath_residual (host)) ; -#endif - } - return SPECIFIC_INT_RESTART; -#endif -#ifdef A_int_debug_sync - case A_int_debug_sync: - if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR| - OPTION_DEBUG_DISCONNECT|OPTION_DEBUG_SDTR)) { - unsigned char sxfer = NCR53c7x0_read8 (SXFER_REG), scntl3; - if ((hostdata->chip / 100) == 8) { - scntl3 = NCR53c7x0_read8 (SCNTL3_REG_800); - if (c) { - if (sxfer != hostdata->sync[c->device->id].sxfer_sanity || - scntl3 != hostdata->sync[c->device->id].scntl3_sanity) { - printk ("scsi%d : sync sanity check failed sxfer=0x%x, scntl3=0x%x", - host->host_no, sxfer, scntl3); - NCR53c7x0_write8 (SXFER_REG, sxfer); - NCR53c7x0_write8 (SCNTL3_REG_800, scntl3); - } - } else - printk ("scsi%d : unknown command sxfer=0x%x, scntl3=0x%x\n", - host->host_no, (int) sxfer, (int) scntl3); - } else { - if (c) { - if (sxfer != hostdata->sync[c->device->id].sxfer_sanity) { - printk ("scsi%d : sync sanity check failed sxfer=0x%x", - host->host_no, sxfer); - NCR53c7x0_write8 (SXFER_REG, sxfer); - NCR53c7x0_write8 (SBCL_REG, - hostdata->sync[c->device->id].sscf_710); - } - } else - printk ("scsi%d : unknown command sxfer=0x%x\n", - host->host_no, (int) sxfer); - } - } - return SPECIFIC_INT_RESTART; -#endif -#ifdef A_int_debug_datain - case A_int_debug_datain: - if (hostdata->options & (OPTION_DEBUG_SCRIPT|OPTION_DEBUG_INTR| - OPTION_DEBUG_DISCONNECT|OPTION_DEBUG_SDTR)) { - int size; - if ((hostdata->chip / 100) == 8) - printk ("scsi%d : In do_datain (%s) sxfer=0x%x, scntl3=0x%x\n" - " datapath residual=%d\n", - host->host_no, sbcl_to_phase (NCR53c7x0_read8 (SBCL_REG)), - (int) NCR53c7x0_read8(SXFER_REG), - (int) NCR53c7x0_read8(SCNTL3_REG_800), - datapath_residual (host)) ; - else - printk ("scsi%d : In do_datain (%s) sxfer=0x%x\n" - " datapath residual=%d\n", - host->host_no, sbcl_to_phase (NCR53c7x0_read8 (SBCL_REG)), - (int) NCR53c7x0_read8(SXFER_REG), - datapath_residual (host)) ; - print_insn (host, dsp, "", 1); - size = print_insn (host, (u32 *) bus_to_virt(dsp[1]), "", 1); - print_insn (host, (u32 *) bus_to_virt(dsp[1]) + size, "", 1); - } - return SPECIFIC_INT_RESTART; -#endif -#ifdef A_int_debug_check_dsa - case A_int_debug_check_dsa: - if (NCR53c7x0_read8 (SCNTL1_REG) & SCNTL1_CON) { - int sdid; - int tmp; - char *where; - if (hostdata->chip / 100 == 8) - sdid = NCR53c7x0_read8 (SDID_REG_800) & 15; - else { - tmp = NCR53c7x0_read8 (SDID_REG_700); - if (!tmp) - panic ("SDID_REG_700 = 0"); - tmp >>= 1; - sdid = 0; - while (tmp) { - tmp >>= 1; - sdid++; - } - } - where = dsp - NCR53c7x0_insn_size(NCR53c7x0_read8 - (DCMD_REG)) == hostdata->script + - Ent_select_check_dsa / sizeof(u32) ? - "selection" : "reselection"; - if (c && sdid != c->device->id) { - printk ("scsi%d : SDID target %d != DSA target %d at %s\n", - host->host_no, sdid, c->device->id, where); - print_lots(host); - dump_events (host, 20); - return SPECIFIC_INT_PANIC; - } - } - return SPECIFIC_INT_RESTART; -#endif - default: - if ((dsps & 0xff000000) == 0x03000000) { - printk ("scsi%d : misc debug interrupt 0x%x\n", - host->host_no, dsps); - return SPECIFIC_INT_RESTART; - } else if ((dsps & 0xff000000) == 0x05000000) { - if (hostdata->events) { - struct NCR53c7x0_event *event; - ++hostdata->event_index; - if (hostdata->event_index >= hostdata->event_size) - hostdata->event_index = 0; - event = (struct NCR53c7x0_event *) hostdata->events + - hostdata->event_index; - event->event = (enum ncr_event) dsps; - event->dsa = bus_to_virt(NCR53c7x0_read32(DSA_REG)); - if (NCR53c7x0_read8 (SCNTL1_REG) & SCNTL1_CON) { - if (hostdata->chip / 100 == 8) - event->target = NCR53c7x0_read8(SSID_REG_800); - else { - unsigned char tmp, sdid; - tmp = NCR53c7x0_read8 (SDID_REG_700); - if (!tmp) - panic ("SDID_REG_700 = 0"); - tmp >>= 1; - sdid = 0; - while (tmp) { - tmp >>= 1; - sdid++; - } - event->target = sdid; - } - } - else - event->target = 255; - - if (event->event == EVENT_RESELECT) - event->lun = hostdata->reselected_identify & 0xf; - else if (c) - event->lun = c->device->lun; - else - event->lun = 255; - do_gettimeofday(&(event->time)); - if (c) { - event->pid = c->pid; - memcpy ((void *) event->cmnd, (void *) c->cmnd, - sizeof (event->cmnd)); - } else { - event->pid = -1; - } - } - return SPECIFIC_INT_RESTART; - } - - printk ("scsi%d : unknown user interrupt 0x%x\n", - host->host_no, (unsigned) dsps); - return SPECIFIC_INT_PANIC; - } -} - -/* - * XXX - the stock NCR assembler won't output the scriptu.h file, - * which undefine's all #define'd CPP symbols from the script.h - * file, which will create problems if you use multiple scripts - * with the same symbol names. - * - * If you insist on using NCR's assembler, you could generate - * scriptu.h from script.h using something like - * - * grep #define script.h | \ - * sed 's/#define[ ][ ]*\([_a-zA-Z][_a-zA-Z0-9]*\).*$/#undefine \1/' \ - * > scriptu.h - */ - -#include "53c7xx_u.h" - -/* XXX - add alternate script handling code here */ - - -/* - * Function : static void NCR537xx_soft_reset (struct Scsi_Host *host) - * - * Purpose : perform a soft reset of the NCR53c7xx chip - * - * Inputs : host - pointer to this host adapter's structure - * - * Preconditions : NCR53c7x0_init must have been called for this - * host. - * - */ - -static void -NCR53c7x0_soft_reset (struct Scsi_Host *host) { - NCR53c7x0_local_declare(); - unsigned long flags; - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - NCR53c7x0_local_setup(host); - - local_irq_save(flags); - - /* Disable scsi chip and s/w level 7 ints */ - -#ifdef CONFIG_MVME16x - if (MACH_IS_MVME16x) - { - volatile unsigned long v; - - v = *(volatile unsigned long *)0xfff4006c; - v &= ~0x8000; - *(volatile unsigned long *)0xfff4006c = v; - v = *(volatile unsigned long *)0xfff4202c; - v &= ~0x10; - *(volatile unsigned long *)0xfff4202c = v; - } -#endif - /* Anything specific for your hardware? */ - - /* - * Do a soft reset of the chip so that everything is - * reinitialized to the power-on state. - * - * Basically follow the procedure outlined in the NCR53c700 - * data manual under Chapter Six, How to Use, Steps Necessary to - * Start SCRIPTS, with the exception of actually starting the - * script and setting up the synchronous transfer gunk. - */ - - /* Should we reset the scsi bus here??????????????????? */ - - NCR53c7x0_write8(ISTAT_REG_700, ISTAT_10_SRST); - NCR53c7x0_write8(ISTAT_REG_700, 0); - - /* - * saved_dcntl is set up in NCR53c7x0_init() before it is overwritten - * here. We should have some better way of working out the CF bit - * setting.. - */ - - hostdata->saved_dcntl = DCNTL_10_EA|DCNTL_10_COM; - if (hostdata->scsi_clock > 50000000) - hostdata->saved_dcntl |= DCNTL_700_CF_3; - else - if (hostdata->scsi_clock > 37500000) - hostdata->saved_dcntl |= DCNTL_700_CF_2; -#if 0 - else - /* Any clocks less than 37.5MHz? */ -#endif - - if (hostdata->options & OPTION_DEBUG_TRACE) - NCR53c7x0_write8(DCNTL_REG, hostdata->saved_dcntl | DCNTL_SSM); - else - NCR53c7x0_write8(DCNTL_REG, hostdata->saved_dcntl); - /* Following disables snooping - snooping is not required, as non- - * cached pages are used for shared data, and appropriate use is - * made of cache_push/cache_clear. Indeed, for 68060 - * enabling snooping causes disk corruption of ext2fs free block - * bitmaps and the like. If you have a 68060 with snooping hardwared - * on, then you need to enable CONFIG_060_WRITETHROUGH. - */ - NCR53c7x0_write8(CTEST7_REG, CTEST7_10_TT1|CTEST7_STD); - /* Actually burst of eight, according to my 53c710 databook */ - NCR53c7x0_write8(hostdata->dmode, DMODE_10_BL_8 | DMODE_10_FC2); - NCR53c7x0_write8(SCID_REG, 1 << host->this_id); - NCR53c7x0_write8(SBCL_REG, 0); - NCR53c7x0_write8(SCNTL1_REG, SCNTL1_ESR_700); - NCR53c7x0_write8(SCNTL0_REG, ((hostdata->options & OPTION_PARITY) ? - SCNTL0_EPC : 0) | SCNTL0_EPG_700 | SCNTL0_ARB1 | SCNTL0_ARB2); - - /* - * Enable all interrupts, except parity which we only want when - * the user requests it. - */ - - NCR53c7x0_write8(DIEN_REG, DIEN_700_BF | - DIEN_ABRT | DIEN_SSI | DIEN_SIR | DIEN_700_OPC); - - NCR53c7x0_write8(SIEN_REG_700, ((hostdata->options & OPTION_PARITY) ? - SIEN_PAR : 0) | SIEN_700_STO | SIEN_RST | SIEN_UDC | - SIEN_SGE | SIEN_MA); - -#ifdef CONFIG_MVME16x - if (MACH_IS_MVME16x) - { - volatile unsigned long v; - - /* Enable scsi chip and s/w level 7 ints */ - v = *(volatile unsigned long *)0xfff40080; - v = (v & ~(0xf << 28)) | (4 << 28); - *(volatile unsigned long *)0xfff40080 = v; - v = *(volatile unsigned long *)0xfff4006c; - v |= 0x8000; - *(volatile unsigned long *)0xfff4006c = v; - v = *(volatile unsigned long *)0xfff4202c; - v = (v & ~0xff) | 0x10 | 4; - *(volatile unsigned long *)0xfff4202c = v; - } -#endif - /* Anything needed for your hardware? */ - local_irq_restore(flags); -} - - -/* - * Function static struct NCR53c7x0_cmd *allocate_cmd (Scsi_Cmnd *cmd) - * - * Purpose : Return the first free NCR53c7x0_cmd structure (which are - * reused in a LIFO manner to minimize cache thrashing). - * - * Side effects : If we haven't yet scheduled allocation of NCR53c7x0_cmd - * structures for this device, do so. Attempt to complete all scheduled - * allocations using get_zeroed_page(), putting NCR53c7x0_cmd structures on - * the free list. Teach programmers not to drink and hack. - * - * Inputs : cmd - SCSI command - * - * Returns : NCR53c7x0_cmd structure allocated on behalf of cmd; - * NULL on failure. - */ - -static void -my_free_page (void *addr, int dummy) -{ - /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING, which - * XXX may be invalid (CONFIG_060_WRITETHROUGH) - */ - kernel_set_cachemode((void *)addr, 4096, IOMAP_FULL_CACHING); - free_page ((u32)addr); -} - -static struct NCR53c7x0_cmd * -allocate_cmd (Scsi_Cmnd *cmd) { - struct Scsi_Host *host = cmd->device->host; - struct NCR53c7x0_hostdata *hostdata = - (struct NCR53c7x0_hostdata *) host->hostdata[0]; - u32 real; /* Real address */ - int size; /* Size of *tmp */ - struct NCR53c7x0_cmd *tmp; - unsigned long flags; - - if (hostdata->options & OPTION_DEBUG_ALLOCATION) - printk ("scsi%d : num_cmds = %d, can_queue = %d\n" - " target = %d, lun = %d, %s\n", - host->host_no, hostdata->num_cmds, host->can_queue, - cmd->device->id, cmd->device->lun, (hostdata->cmd_allocated[cmd->device->id] & - (1 << cmd->device->lun)) ? "already allocated" : "not allocated"); - -/* - * If we have not yet reserved commands for this I_T_L nexus, and - * the device exists (as indicated by permanent Scsi_Cmnd structures - * being allocated under 1.3.x, or being outside of scan_scsis in - * 1.2.x), do so now. - */ - if (!(hostdata->cmd_allocated[cmd->device->id] & (1 << cmd->device->lun)) && - cmd->device && cmd->device->has_cmdblocks) { - if ((hostdata->extra_allocate + hostdata->num_cmds) < host->can_queue) - hostdata->extra_allocate += host->cmd_per_lun; - hostdata->cmd_allocated[cmd->device->id] |= (1 << cmd->device->lun); - } - - for (; hostdata->extra_allocate > 0 ; --hostdata->extra_allocate, - ++hostdata->num_cmds) { - /* historically, kmalloc has returned unaligned addresses; pad so we - have enough room to ROUNDUP */ - size = hostdata->max_cmd_size + sizeof (void *); -#ifdef FORCE_DSA_ALIGNMENT - /* - * 53c710 rev.0 doesn't have an add-with-carry instruction. - * Ensure we allocate enough memory to force alignment. - */ - size += 256; -#endif -/* FIXME: for ISA bus '7xx chips, we need to or GFP_DMA in here */ - - if (size > 4096) { - printk (KERN_ERR "53c7xx: allocate_cmd size > 4K\n"); - return NULL; - } - real = get_zeroed_page(GFP_ATOMIC); - if (real == 0) - return NULL; - cache_push(virt_to_phys((void *)real), 4096); - cache_clear(virt_to_phys((void *)real), 4096); - kernel_set_cachemode((void *)real, 4096, IOMAP_NOCACHE_SER); - tmp = ROUNDUP(real, void *); -#ifdef FORCE_DSA_ALIGNMENT - { - if (((u32)tmp & 0xff) > CmdPageStart) - tmp = (struct NCR53c7x0_cmd *)((u32)tmp + 255); - tmp = (struct NCR53c7x0_cmd *)(((u32)tmp & ~0xff) + CmdPageStart); -#if 0 - printk ("scsi: size = %d, real = 0x%08x, tmp set to 0x%08x\n", - size, real, (u32)tmp); -#endif - } -#endif - tmp->real = (void *)real; - tmp->size = size; - tmp->free = ((void (*)(void *, int)) my_free_page); - local_irq_save(flags); - tmp->next = hostdata->free; - hostdata->free = tmp; - local_irq_restore(flags); - } - local_irq_save(flags); - tmp = (struct NCR53c7x0_cmd *) hostdata->free; - if (tmp) { - hostdata->free = tmp->next; - } - local_irq_restore(flags); - if (!tmp) - printk ("scsi%d : can't allocate command for target %d lun %d\n", - host->host_no, cmd->device->id, cmd->device->lun); - return tmp; -} - -/* - * Function static struct NCR53c7x0_cmd *create_cmd (Scsi_Cmnd *cmd) - * - * - * Purpose : allocate a NCR53c7x0_cmd structure, initialize it based on the - * Scsi_Cmnd structure passed in cmd, including dsa and Linux field - * initialization, and dsa code relocation. - * - * Inputs : cmd - SCSI command - * - * Returns : NCR53c7x0_cmd structure corresponding to cmd, - * NULL on failure. - */ -static struct NCR53c7x0_cmd * -create_cmd (Scsi_Cmnd *cmd) { - NCR53c7x0_local_declare(); - struct Scsi_Host *host = cmd->device->host; - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - struct NCR53c7x0_cmd *tmp; /* NCR53c7x0_cmd structure for this command */ - int datain, /* Number of instructions per phase */ - dataout; - int data_transfer_instructions, /* Count of dynamic instructions */ - i; /* Counter */ - u32 *cmd_datain, /* Address of datain/dataout code */ - *cmd_dataout; /* Incremented as we assemble */ -#ifdef notyet - unsigned char *msgptr; /* Current byte in select message */ - int msglen; /* Length of whole select message */ -#endif - unsigned long flags; - u32 exp_select_indirect; /* Used in sanity check */ - NCR53c7x0_local_setup(cmd->device->host); - - if (!(tmp = allocate_cmd (cmd))) - return NULL; - - /* - * Copy CDB and initialised result fields from Scsi_Cmnd to NCR53c7x0_cmd. - * We do this because NCR53c7x0_cmd may have a special cache mode - * selected to cope with lack of bus snooping, etc. - */ - - memcpy(tmp->cmnd, cmd->cmnd, 12); - tmp->result = cmd->result; - - /* - * Decide whether we need to generate commands for DATA IN, - * DATA OUT, neither, or both based on the SCSI command - */ - - switch (cmd->cmnd[0]) { - /* These commands do DATA IN */ - case INQUIRY: - case MODE_SENSE: - case READ_6: - case READ_10: - case READ_CAPACITY: - case REQUEST_SENSE: - case READ_BLOCK_LIMITS: - case READ_TOC: - datain = 2 * (cmd->use_sg ? cmd->use_sg : 1) + 3; - dataout = 0; - break; - /* These commands do DATA OUT */ - case MODE_SELECT: - case WRITE_6: - case WRITE_10: -#if 0 - printk("scsi%d : command is ", host->host_no); - __scsi_print_command(cmd->cmnd); -#endif -#if 0 - printk ("scsi%d : %d scatter/gather segments\n", host->host_no, - cmd->use_sg); -#endif - datain = 0; - dataout = 2 * (cmd->use_sg ? cmd->use_sg : 1) + 3; -#if 0 - hostdata->options |= OPTION_DEBUG_INTR; -#endif - break; - /* - * These commands do no data transfer, we should force an - * interrupt if a data phase is attempted on them. - */ - case TEST_UNIT_READY: - case ALLOW_MEDIUM_REMOVAL: - case START_STOP: - datain = dataout = 0; - break; - /* - * We don't know about these commands, so generate code to handle - * both DATA IN and DATA OUT phases. More efficient to identify them - * and add them to the above cases. - */ - default: - printk("scsi%d : datain+dataout for command ", host->host_no); - __scsi_print_command(cmd->cmnd); - datain = dataout = 2 * (cmd->use_sg ? cmd->use_sg : 1) + 3; - } - - /* - * New code : so that active pointers work correctly regardless - * of where the saved data pointer is at, we want to immediately - * enter the dynamic code after selection, and on a non-data - * phase perform a CALL to the non-data phase handler, with - * returns back to this address. - * - * If a phase mismatch is encountered in the middle of a - * Block MOVE instruction, we want to _leave_ that instruction - * unchanged as the current case is, modify a temporary buffer, - * and point the active pointer (TEMP) at that. - * - * Furthermore, we want to implement a saved data pointer, - * set by the SAVE_DATA_POINTERs message. - * - * So, the data transfer segments will change to - * CALL data_transfer, WHEN NOT data phase - * MOVE x, x, WHEN data phase - * ( repeat ) - * JUMP other_transfer - */ - - data_transfer_instructions = datain + dataout; - - /* - * When we perform a request sense, we overwrite various things, - * including the data transfer code. Make sure we have enough - * space to do that. - */ - - if (data_transfer_instructions < 2) - data_transfer_instructions = 2; - - - /* - * The saved data pointer is set up so that a RESTORE POINTERS message - * will start the data transfer over at the beginning. - */ - - tmp->saved_data_pointer = virt_to_bus (hostdata->script) + - hostdata->E_data_transfer; - - /* - * Initialize Linux specific fields. - */ - - tmp->cmd = cmd; - tmp->next = NULL; - tmp->flags = 0; - tmp->dsa_next_addr = virt_to_bus(tmp->dsa) + hostdata->dsa_next - - hostdata->dsa_start; - tmp->dsa_addr = virt_to_bus(tmp->dsa) - hostdata->dsa_start; - - /* - * Calculate addresses of dynamic code to fill in DSA - */ - - tmp->data_transfer_start = tmp->dsa + (hostdata->dsa_end - - hostdata->dsa_start) / sizeof(u32); - tmp->data_transfer_end = tmp->data_transfer_start + - 2 * data_transfer_instructions; - - cmd_datain = datain ? tmp->data_transfer_start : NULL; - cmd_dataout = dataout ? (datain ? cmd_datain + 2 * datain : tmp-> - data_transfer_start) : NULL; - - /* - * Fill in the NCR53c7x0_cmd structure as follows - * dsa, with fixed up DSA code - * datain code - * dataout code - */ - - /* Copy template code into dsa and perform all necessary fixups */ - if (hostdata->dsa_fixup) - hostdata->dsa_fixup(tmp); - - patch_dsa_32(tmp->dsa, dsa_next, 0, 0); - /* - * XXX is this giving 53c710 access to the Scsi_Cmnd in some way? - * Do we need to change it for caching reasons? - */ - patch_dsa_32(tmp->dsa, dsa_cmnd, 0, virt_to_bus(cmd)); - - if (hostdata->options & OPTION_DEBUG_SYNCHRONOUS) { - - exp_select_indirect = ((1 << cmd->device->id) << 16) | - (hostdata->sync[cmd->device->id].sxfer_sanity << 8); - - if (hostdata->sync[cmd->device->id].select_indirect != - exp_select_indirect) { - printk ("scsi%d : sanity check failed select_indirect=0x%x\n", - host->host_no, hostdata->sync[cmd->device->id].select_indirect); - FATAL(host); - - } - } - - patch_dsa_32(tmp->dsa, dsa_select, 0, - hostdata->sync[cmd->device->id].select_indirect); - - /* - * Right now, we'll do the WIDE and SYNCHRONOUS negotiations on - * different commands; although it should be trivial to do them - * both at the same time. - */ - if (hostdata->initiate_wdtr & (1 << cmd->device->id)) { - memcpy ((void *) (tmp->select + 1), (void *) wdtr_message, - sizeof(wdtr_message)); - patch_dsa_32(tmp->dsa, dsa_msgout, 0, 1 + sizeof(wdtr_message)); - local_irq_save(flags); - hostdata->initiate_wdtr &= ~(1 << cmd->device->id); - local_irq_restore(flags); - } else if (hostdata->initiate_sdtr & (1 << cmd->device->id)) { - memcpy ((void *) (tmp->select + 1), (void *) sdtr_message, - sizeof(sdtr_message)); - patch_dsa_32(tmp->dsa, dsa_msgout, 0, 1 + sizeof(sdtr_message)); - tmp->flags |= CMD_FLAG_SDTR; - local_irq_save(flags); - hostdata->initiate_sdtr &= ~(1 << cmd->device->id); - local_irq_restore(flags); - - } -#if 1 - else if (!(hostdata->talked_to & (1 << cmd->device->id)) && - !(hostdata->options & OPTION_NO_ASYNC)) { - - memcpy ((void *) (tmp->select + 1), (void *) async_message, - sizeof(async_message)); - patch_dsa_32(tmp->dsa, dsa_msgout, 0, 1 + sizeof(async_message)); - tmp->flags |= CMD_FLAG_SDTR; - } -#endif - else - patch_dsa_32(tmp->dsa, dsa_msgout, 0, 1); - - hostdata->talked_to |= (1 << cmd->device->id); - tmp->select[0] = (hostdata->options & OPTION_DISCONNECT) ? - IDENTIFY (1, cmd->device->lun) : IDENTIFY (0, cmd->device->lun); - patch_dsa_32(tmp->dsa, dsa_msgout, 1, virt_to_bus(tmp->select)); - patch_dsa_32(tmp->dsa, dsa_cmdout, 0, cmd->cmd_len); - patch_dsa_32(tmp->dsa, dsa_cmdout, 1, virt_to_bus(tmp->cmnd)); - patch_dsa_32(tmp->dsa, dsa_dataout, 0, cmd_dataout ? - virt_to_bus (cmd_dataout) - : virt_to_bus (hostdata->script) + hostdata->E_other_transfer); - patch_dsa_32(tmp->dsa, dsa_datain, 0, cmd_datain ? - virt_to_bus (cmd_datain) - : virt_to_bus (hostdata->script) + hostdata->E_other_transfer); - /* - * XXX - need to make endian aware, should use separate variables - * for both status and message bytes. - */ - patch_dsa_32(tmp->dsa, dsa_msgin, 0, 1); -/* - * FIXME : these only works for little endian. We probably want to - * provide message and status fields in the NCR53c7x0_cmd - * structure, and assign them to cmd->result when we're done. - */ -#ifdef BIG_ENDIAN - patch_dsa_32(tmp->dsa, dsa_msgin, 1, virt_to_bus(&tmp->result) + 2); - patch_dsa_32(tmp->dsa, dsa_status, 0, 1); - patch_dsa_32(tmp->dsa, dsa_status, 1, virt_to_bus(&tmp->result) + 3); -#else - patch_dsa_32(tmp->dsa, dsa_msgin, 1, virt_to_bus(&tmp->result) + 1); - patch_dsa_32(tmp->dsa, dsa_status, 0, 1); - patch_dsa_32(tmp->dsa, dsa_status, 1, virt_to_bus(&tmp->result)); -#endif - patch_dsa_32(tmp->dsa, dsa_msgout_other, 0, 1); - patch_dsa_32(tmp->dsa, dsa_msgout_other, 1, - virt_to_bus(&(hostdata->NCR53c7xx_msg_nop))); - - /* - * Generate code for zero or more of the DATA IN, DATA OUT phases - * in the format - * - * CALL data_transfer, WHEN NOT phase - * MOVE first buffer length, first buffer address, WHEN phase - * ... - * MOVE last buffer length, last buffer address, WHEN phase - * JUMP other_transfer - */ - -/* - * See if we're getting to data transfer by generating an unconditional - * interrupt. - */ -#if 0 - if (datain) { - cmd_datain[0] = 0x98080000; - cmd_datain[1] = 0x03ffd00d; - cmd_datain += 2; - } -#endif - -/* - * XXX - I'm undecided whether all of this nonsense is faster - * in the long run, or whether I should just go and implement a loop - * on the NCR chip using table indirect mode? - * - * In any case, this is how it _must_ be done for 53c700/700-66 chips, - * so this stays even when we come up with something better. - * - * When we're limited to 1 simultaneous command, no overlapping processing, - * we're seeing 630K/sec, with 7% CPU usage on a slow Syquest 45M - * drive. - * - * Not bad, not good. We'll see. - */ - - tmp->bounce.len = 0; /* Assume aligned buffer */ - - for (i = 0; cmd->use_sg ? (i < cmd->use_sg) : !i; cmd_datain += 4, - cmd_dataout += 4, ++i) { - u32 vbuf = cmd->use_sg - ? (u32)page_address(((struct scatterlist *)cmd->request_buffer)[i].page)+ - ((struct scatterlist *)cmd->request_buffer)[i].offset - : (u32)(cmd->request_buffer); - u32 bbuf = virt_to_bus((void *)vbuf); - u32 count = cmd->use_sg ? - ((struct scatterlist *)cmd->request_buffer)[i].length : - cmd->request_bufflen; - - /* - * If we have buffers which are not aligned with 16 byte cache - * lines, then we just hope nothing accesses the other parts of - * those cache lines while the transfer is in progress. That would - * fill the cache, and subsequent reads of the dma data would pick - * up the wrong thing. - * XXX We need a bounce buffer to handle that correctly. - */ - - if (((bbuf & 15) || (count & 15)) && (datain || dataout)) - { - /* Bounce buffer needed */ - if (cmd->use_sg) - printk ("53c7xx: Non-aligned buffer with use_sg\n"); - else if (datain && dataout) - printk ("53c7xx: Non-aligned buffer with datain && dataout\n"); - else if (count > 256) - printk ("53c7xx: Non-aligned transfer > 256 bytes\n"); - else - { - if (datain) - { - tmp->bounce.len = count; - tmp->bounce.addr = vbuf; - bbuf = virt_to_bus(tmp->bounce.buf); - tmp->bounce.buf[0] = 0xff; - tmp->bounce.buf[1] = 0xfe; - tmp->bounce.buf[2] = 0xfd; - tmp->bounce.buf[3] = 0xfc; - } - if (dataout) - { - memcpy ((void *)tmp->bounce.buf, (void *)vbuf, count); - bbuf = virt_to_bus(tmp->bounce.buf); - } - } - } - - if (datain) { - cache_clear(virt_to_phys((void *)vbuf), count); - /* CALL other_in, WHEN NOT DATA_IN */ - cmd_datain[0] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_CALL | - DCMD_TCI_IO) << 24) | - DBC_TCI_WAIT_FOR_VALID | DBC_TCI_COMPARE_PHASE; - cmd_datain[1] = virt_to_bus (hostdata->script) + - hostdata->E_other_in; - /* MOVE count, buf, WHEN DATA_IN */ - cmd_datain[2] = ((DCMD_TYPE_BMI | DCMD_BMI_OP_MOVE_I | DCMD_BMI_IO) - << 24) | count; - cmd_datain[3] = bbuf; -#if 0 - print_insn (host, cmd_datain, "dynamic ", 1); - print_insn (host, cmd_datain + 2, "dynamic ", 1); -#endif - } - if (dataout) { - cache_push(virt_to_phys((void *)vbuf), count); - /* CALL other_out, WHEN NOT DATA_OUT */ - cmd_dataout[0] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_CALL) << 24) | - DBC_TCI_WAIT_FOR_VALID | DBC_TCI_COMPARE_PHASE; - cmd_dataout[1] = virt_to_bus(hostdata->script) + - hostdata->E_other_out; - /* MOVE count, buf, WHEN DATA+OUT */ - cmd_dataout[2] = ((DCMD_TYPE_BMI | DCMD_BMI_OP_MOVE_I) << 24) - | count; - cmd_dataout[3] = bbuf; -#if 0 - print_insn (host, cmd_dataout, "dynamic ", 1); - print_insn (host, cmd_dataout + 2, "dynamic ", 1); -#endif - } - } - - /* - * Install JUMP instructions after the data transfer routines to return - * control to the do_other_transfer routines. - */ - - - if (datain) { - cmd_datain[0] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_JUMP) << 24) | - DBC_TCI_TRUE; - cmd_datain[1] = virt_to_bus(hostdata->script) + - hostdata->E_other_transfer; -#if 0 - print_insn (host, cmd_datain, "dynamic jump ", 1); -#endif - cmd_datain += 2; - } -#if 0 - if (datain) { - cmd_datain[0] = 0x98080000; - cmd_datain[1] = 0x03ffdeed; - cmd_datain += 2; - } -#endif - if (dataout) { - cmd_dataout[0] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_JUMP) << 24) | - DBC_TCI_TRUE; - cmd_dataout[1] = virt_to_bus(hostdata->script) + - hostdata->E_other_transfer; -#if 0 - print_insn (host, cmd_dataout, "dynamic jump ", 1); -#endif - cmd_dataout += 2; - } - - return tmp; -} - -/* - * Function : int NCR53c7xx_queue_command (Scsi_Cmnd *cmd, - * void (*done)(Scsi_Cmnd *)) - * - * Purpose : enqueues a SCSI command - * - * Inputs : cmd - SCSI command, done - function called on completion, with - * a pointer to the command descriptor. - * - * Returns : 0 - * - * Side effects : - * cmd is added to the per instance driver issue_queue, with major - * twiddling done to the host specific fields of cmd. If the - * process_issue_queue coroutine isn't running, it is restarted. - * - * NOTE : we use the host_scribble field of the Scsi_Cmnd structure to - * hold our own data, and pervert the ptr field of the SCp field - * to create a linked list. - */ - -int -NCR53c7xx_queue_command (Scsi_Cmnd *cmd, void (* done)(Scsi_Cmnd *)) { - struct Scsi_Host *host = cmd->device->host; - struct NCR53c7x0_hostdata *hostdata = - (struct NCR53c7x0_hostdata *) host->hostdata[0]; - unsigned long flags; - Scsi_Cmnd *tmp; - - cmd->scsi_done = done; - cmd->host_scribble = NULL; - cmd->SCp.ptr = NULL; - cmd->SCp.buffer = NULL; - -#ifdef VALID_IDS - /* Ignore commands on invalid IDs */ - if (!hostdata->valid_ids[cmd->device->id]) { - printk("scsi%d : ignoring target %d lun %d\n", host->host_no, - cmd->device->id, cmd->device->lun); - cmd->result = (DID_BAD_TARGET << 16); - done(cmd); - return 0; - } -#endif - - local_irq_save(flags); - if ((hostdata->options & (OPTION_DEBUG_INIT_ONLY|OPTION_DEBUG_PROBE_ONLY)) - || ((hostdata->options & OPTION_DEBUG_TARGET_LIMIT) && - !(hostdata->debug_lun_limit[cmd->device->id] & (1 << cmd->device->lun))) -#ifdef LINUX_1_2 - || cmd->device->id > 7 -#else - || cmd->device->id >= host->max_id -#endif - || cmd->device->id == host->this_id - || hostdata->state == STATE_DISABLED) { - printk("scsi%d : disabled or bad target %d lun %d\n", host->host_no, - cmd->device->id, cmd->device->lun); - cmd->result = (DID_BAD_TARGET << 16); - done(cmd); - local_irq_restore(flags); - return 0; - } - - if ((hostdata->options & OPTION_DEBUG_NCOMMANDS_LIMIT) && - (hostdata->debug_count_limit == 0)) { - printk("scsi%d : maximum commands exceeded\n", host->host_no); - cmd->result = (DID_BAD_TARGET << 16); - done(cmd); - local_irq_restore(flags); - return 0; - } - - if (hostdata->options & OPTION_DEBUG_READ_ONLY) { - switch (cmd->cmnd[0]) { - case WRITE_6: - case WRITE_10: - printk("scsi%d : WRITE attempted with NO_WRITE debugging flag set\n", - host->host_no); - cmd->result = (DID_BAD_TARGET << 16); - done(cmd); - local_irq_restore(flags); - return 0; - } - } - - if ((hostdata->options & OPTION_DEBUG_TARGET_LIMIT) && - hostdata->debug_count_limit != -1) - --hostdata->debug_count_limit; - - cmd->result = 0xffff; /* The NCR will overwrite message - and status with valid data */ - cmd->host_scribble = (unsigned char *) tmp = create_cmd (cmd); - - /* - * REQUEST SENSE commands are inserted at the head of the queue - * so that we do not clear the contingent allegiance condition - * they may be looking at. - */ - - if (!(hostdata->issue_queue) || (cmd->cmnd[0] == REQUEST_SENSE)) { - cmd->SCp.ptr = (unsigned char *) hostdata->issue_queue; - hostdata->issue_queue = cmd; - } else { - for (tmp = (Scsi_Cmnd *) hostdata->issue_queue; tmp->SCp.ptr; - tmp = (Scsi_Cmnd *) tmp->SCp.ptr); - tmp->SCp.ptr = (unsigned char *) cmd; - } - local_irq_restore(flags); - run_process_issue_queue(); - return 0; -} - -/* - * Function : void to_schedule_list (struct Scsi_Host *host, - * struct NCR53c7x0_hostdata * hostdata, Scsi_Cmnd *cmd) - * - * Purpose : takes a SCSI command which was just removed from the - * issue queue, and deals with it by inserting it in the first - * free slot in the schedule list or by terminating it immediately. - * - * Inputs : - * host - SCSI host adapter; hostdata - hostdata structure for - * this adapter; cmd - a pointer to the command; should have - * the host_scribble field initialized to point to a valid - * - * Side effects : - * cmd is added to the per instance schedule list, with minor - * twiddling done to the host specific fields of cmd. - * - */ - -static __inline__ void -to_schedule_list (struct Scsi_Host *host, struct NCR53c7x0_hostdata *hostdata, - struct NCR53c7x0_cmd *cmd) { - NCR53c7x0_local_declare(); - Scsi_Cmnd *tmp = cmd->cmd; - unsigned long flags; - /* dsa start is negative, so subtraction is used */ - volatile u32 *ncrcurrent; - - int i; - NCR53c7x0_local_setup(host); -#if 0 - printk("scsi%d : new dsa is 0x%lx (virt 0x%p)\n", host->host_no, - virt_to_bus(hostdata->dsa), hostdata->dsa); -#endif - - local_irq_save(flags); - - /* - * Work around race condition : if an interrupt fired and we - * got disabled forget about this command. - */ - - if (hostdata->state == STATE_DISABLED) { - printk("scsi%d : driver disabled\n", host->host_no); - tmp->result = (DID_BAD_TARGET << 16); - cmd->next = (struct NCR53c7x0_cmd *) hostdata->free; - hostdata->free = cmd; - tmp->scsi_done(tmp); - local_irq_restore(flags); - return; - } - - for (i = host->can_queue, ncrcurrent = hostdata->schedule; - i > 0 && ncrcurrent[0] != hostdata->NOP_insn; - --i, ncrcurrent += 2 /* JUMP instructions are two words */); - - if (i > 0) { - ++hostdata->busy[tmp->device->id][tmp->device->lun]; - cmd->next = hostdata->running_list; - hostdata->running_list = cmd; - - /* Restore this instruction to a NOP once the command starts */ - cmd->dsa [(hostdata->dsa_jump_dest - hostdata->dsa_start) / - sizeof(u32)] = (u32) virt_to_bus ((void *)ncrcurrent); - /* Replace the current jump operand. */ - ncrcurrent[1] = - virt_to_bus ((void *) cmd->dsa) + hostdata->E_dsa_code_begin - - hostdata->E_dsa_code_template; - /* Replace the NOP instruction with a JUMP */ - ncrcurrent[0] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_JUMP) << 24) | - DBC_TCI_TRUE; - } else { - printk ("scsi%d: no free slot\n", host->host_no); - disable(host); - tmp->result = (DID_ERROR << 16); - cmd->next = (struct NCR53c7x0_cmd *) hostdata->free; - hostdata->free = cmd; - tmp->scsi_done(tmp); - local_irq_restore(flags); - return; - } - - /* - * If the NCR chip is in an idle state, start it running the scheduler - * immediately. Otherwise, signal the chip to jump to schedule as - * soon as it is idle. - */ - - if (hostdata->idle) { - hostdata->idle = 0; - hostdata->state = STATE_RUNNING; - NCR53c7x0_write32 (DSP_REG, virt_to_bus ((void *)hostdata->schedule)); - if (hostdata->options & OPTION_DEBUG_TRACE) - NCR53c7x0_write8 (DCNTL_REG, hostdata->saved_dcntl | - DCNTL_SSM | DCNTL_STD); - } else { - NCR53c7x0_write8(hostdata->istat, ISTAT_10_SIGP); - } - - local_irq_restore(flags); -} - -/* - * Function : busyp (struct Scsi_Host *host, struct NCR53c7x0_hostdata - * *hostdata, Scsi_Cmnd *cmd) - * - * Purpose : decide if we can pass the given SCSI command on to the - * device in question or not. - * - * Returns : non-zero when we're busy, 0 when we aren't. - */ - -static __inline__ int -busyp (struct Scsi_Host *host, struct NCR53c7x0_hostdata *hostdata, - Scsi_Cmnd *cmd) { - /* FIXME : in the future, this needs to accommodate SCSI-II tagged - queuing, and we may be able to play with fairness here a bit. - */ - return hostdata->busy[cmd->device->id][cmd->device->lun]; -} - -/* - * Function : process_issue_queue (void) - * - * Purpose : transfer commands from the issue queue to NCR start queue - * of each NCR53c7/8xx in the system, avoiding kernel stack - * overflows when the scsi_done() function is invoked recursively. - * - * NOTE : process_issue_queue exits with interrupts *disabled*, so the - * caller must reenable them if it desires. - * - * NOTE : process_issue_queue should be called from both - * NCR53c7x0_queue_command() and from the interrupt handler - * after command completion in case NCR53c7x0_queue_command() - * isn't invoked again but we've freed up resources that are - * needed. - */ - -static void -process_issue_queue (unsigned long flags) { - Scsi_Cmnd *tmp, *prev; - struct Scsi_Host *host; - struct NCR53c7x0_hostdata *hostdata; - int done; - - /* - * We run (with interrupts disabled) until we're sure that none of - * the host adapters have anything that can be done, at which point - * we set process_issue_queue_running to 0 and exit. - * - * Interrupts are enabled before doing various other internal - * instructions, after we've decided that we need to run through - * the loop again. - * - */ - - do { - local_irq_disable(); /* Freeze request queues */ - done = 1; - for (host = first_host; host && host->hostt == the_template; - host = host->next) { - hostdata = (struct NCR53c7x0_hostdata *) host->hostdata[0]; - local_irq_disable(); - if (hostdata->issue_queue) { - if (hostdata->state == STATE_DISABLED) { - tmp = (Scsi_Cmnd *) hostdata->issue_queue; - hostdata->issue_queue = (Scsi_Cmnd *) tmp->SCp.ptr; - tmp->result = (DID_BAD_TARGET << 16); - if (tmp->host_scribble) { - ((struct NCR53c7x0_cmd *)tmp->host_scribble)->next = - hostdata->free; - hostdata->free = - (struct NCR53c7x0_cmd *)tmp->host_scribble; - tmp->host_scribble = NULL; - } - tmp->scsi_done (tmp); - done = 0; - } else - for (tmp = (Scsi_Cmnd *) hostdata->issue_queue, - prev = NULL; tmp; prev = tmp, tmp = (Scsi_Cmnd *) - tmp->SCp.ptr) - if (!tmp->host_scribble || - !busyp (host, hostdata, tmp)) { - if (prev) - prev->SCp.ptr = tmp->SCp.ptr; - else - hostdata->issue_queue = (Scsi_Cmnd *) - tmp->SCp.ptr; - tmp->SCp.ptr = NULL; - if (tmp->host_scribble) { - if (hostdata->options & OPTION_DEBUG_QUEUES) - printk ("scsi%d : moving command for target %d lun %d to start list\n", - host->host_no, tmp->device->id, tmp->device->lun); - - - to_schedule_list (host, hostdata, - (struct NCR53c7x0_cmd *) - tmp->host_scribble); - } else { - if (((tmp->result & 0xff) == 0xff) || - ((tmp->result & 0xff00) == 0xff00)) { - printk ("scsi%d : danger Will Robinson!\n", - host->host_no); - tmp->result = DID_ERROR << 16; - disable (host); - } - tmp->scsi_done(tmp); - } - done = 0; - } /* if target/lun is not busy */ - } /* if hostdata->issue_queue */ - if (!done) - local_irq_restore(flags); - } /* for host */ - } while (!done); - process_issue_queue_running = 0; -} - -/* - * Function : static void intr_scsi (struct Scsi_Host *host, - * struct NCR53c7x0_cmd *cmd) - * - * Purpose : handle all SCSI interrupts, indicated by the setting - * of the SIP bit in the ISTAT register. - * - * Inputs : host, cmd - host and NCR command causing the interrupt, cmd - * may be NULL. - */ - -static void -intr_scsi (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd) { - NCR53c7x0_local_declare(); - struct NCR53c7x0_hostdata *hostdata = - (struct NCR53c7x0_hostdata *) host->hostdata[0]; - unsigned char sstat0_sist0, sist1, /* Registers */ - fatal; /* Did a fatal interrupt - occur ? */ - - NCR53c7x0_local_setup(host); - - fatal = 0; - - sstat0_sist0 = NCR53c7x0_read8(SSTAT0_REG); - sist1 = 0; - - if (hostdata->options & OPTION_DEBUG_INTR) - printk ("scsi%d : SIST0 0x%0x, SIST1 0x%0x\n", host->host_no, - sstat0_sist0, sist1); - - /* 250ms selection timeout */ - if (sstat0_sist0 & SSTAT0_700_STO) { - fatal = 1; - if (hostdata->options & OPTION_DEBUG_INTR) { - printk ("scsi%d : Selection Timeout\n", host->host_no); - if (cmd) { - printk("scsi%d : target %d, lun %d, command ", - host->host_no, cmd->cmd->device->id, cmd->cmd->device->lun); - __scsi_print_command (cmd->cmd->cmnd); - printk("scsi%d : dsp = 0x%x (virt 0x%p)\n", host->host_no, - NCR53c7x0_read32(DSP_REG), - bus_to_virt(NCR53c7x0_read32(DSP_REG))); - } else { - printk("scsi%d : no command\n", host->host_no); - } - } -/* - * XXX - question : how do we want to handle the Illegal Instruction - * interrupt, which may occur before or after the Selection Timeout - * interrupt? - */ - - if (1) { - hostdata->idle = 1; - hostdata->expecting_sto = 0; - - if (hostdata->test_running) { - hostdata->test_running = 0; - hostdata->test_completed = 3; - } else if (cmd) { - abnormal_finished(cmd, DID_BAD_TARGET << 16); - } -#if 0 - hostdata->intrs = 0; -#endif - } - } - -/* - * FIXME : in theory, we can also get a UDC when a STO occurs. - */ - if (sstat0_sist0 & SSTAT0_UDC) { - fatal = 1; - if (cmd) { - printk("scsi%d : target %d lun %d unexpected disconnect\n", - host->host_no, cmd->cmd->device->id, cmd->cmd->device->lun); - print_lots (host); - abnormal_finished(cmd, DID_ERROR << 16); - } else - printk("scsi%d : unexpected disconnect (no command)\n", - host->host_no); - - hostdata->dsp = (u32 *) hostdata->schedule; - hostdata->dsp_changed = 1; - } - - /* SCSI PARITY error */ - if (sstat0_sist0 & SSTAT0_PAR) { - fatal = 1; - if (cmd && cmd->cmd) { - printk("scsi%d : target %d lun %d parity error.\n", - host->host_no, cmd->cmd->device->id, cmd->cmd->device->lun); - abnormal_finished (cmd, DID_PARITY << 16); - } else - printk("scsi%d : parity error\n", host->host_no); - /* Should send message out, parity error */ - - /* XXX - Reduce synchronous transfer rate! */ - hostdata->dsp = hostdata->script + hostdata->E_initiator_abort / - sizeof(u32); - hostdata->dsp_changed = 1; - /* SCSI GROSS error */ - } - - if (sstat0_sist0 & SSTAT0_SGE) { - fatal = 1; - printk("scsi%d : gross error, saved2_dsa = 0x%x\n", host->host_no, - (unsigned int)hostdata->saved2_dsa); - print_lots (host); - - /* - * A SCSI gross error may occur when we have - * - * - A synchronous offset which causes the SCSI FIFO to be overwritten. - * - * - A REQ which causes the maximum synchronous offset programmed in - * the SXFER register to be exceeded. - * - * - A phase change with an outstanding synchronous offset. - * - * - Residual data in the synchronous data FIFO, with a transfer - * other than a synchronous receive is started.$# - */ - - - /* XXX Should deduce synchronous transfer rate! */ - hostdata->dsp = hostdata->script + hostdata->E_initiator_abort / - sizeof(u32); - hostdata->dsp_changed = 1; - /* Phase mismatch */ - } - - if (sstat0_sist0 & SSTAT0_MA) { - fatal = 1; - if (hostdata->options & OPTION_DEBUG_INTR) - printk ("scsi%d : SSTAT0_MA\n", host->host_no); - intr_phase_mismatch (host, cmd); - } - -#if 0 - if (sstat0_sist0 & SIST0_800_RSL) - printk ("scsi%d : Oh no Mr. Bill!\n", host->host_no); -#endif - -/* - * If a fatal SCSI interrupt occurs, we must insure that the DMA and - * SCSI FIFOs were flushed. - */ - - if (fatal) { - if (!hostdata->dstat_valid) { - hostdata->dstat = NCR53c7x0_read8(DSTAT_REG); - hostdata->dstat_valid = 1; - } - - if (!(hostdata->dstat & DSTAT_DFE)) { - printk ("scsi%d : DMA FIFO not empty\n", host->host_no); - /* - * Really need to check this code for 710 RGH. - * Havn't seen any problems, but maybe we should FLUSH before - * clearing sometimes. - */ - NCR53c7x0_write8 (CTEST8_REG, CTEST8_10_CLF); - while (NCR53c7x0_read8 (CTEST8_REG) & CTEST8_10_CLF) - ; - hostdata->dstat |= DSTAT_DFE; - } - } -} - -#ifdef CYCLIC_TRACE - -/* - * The following implements a cyclic log of instructions executed, if you turn - * TRACE on. It will also print the log for you. Very useful when debugging - * 53c710 support, possibly not really needed any more. - */ - -u32 insn_log[4096]; -u32 insn_log_index = 0; - -void log1 (u32 i) -{ - insn_log[insn_log_index++] = i; - if (insn_log_index == 4096) - insn_log_index = 0; -} - -void log_insn (u32 *ip) -{ - log1 ((u32)ip); - log1 (*ip); - log1 (*(ip+1)); - if (((*ip >> 24) & DCMD_TYPE_MASK) == DCMD_TYPE_MMI) - log1 (*(ip+2)); -} - -void dump_log(void) -{ - int cnt = 0; - int i = insn_log_index; - int size; - struct Scsi_Host *host = first_host; - - while (cnt < 4096) { - printk ("%08x (+%6x): ", insn_log[i], (insn_log[i] - (u32)&(((struct NCR53c7x0_hostdata *)host->hostdata[0])->script))/4); - if (++i == 4096) - i = 0; - cnt++; - if (((insn_log[i] >> 24) & DCMD_TYPE_MASK) == DCMD_TYPE_MMI) - size = 3; - else - size = 2; - while (size--) { - printk ("%08x ", insn_log[i]); - if (++i == 4096) - i = 0; - cnt++; - } - printk ("\n"); - } -} -#endif - - -/* - * Function : static void NCR53c7x0_intfly (struct Scsi_Host *host) - * - * Purpose : Scan command queue for specified host, looking for completed - * commands. - * - * Inputs : Scsi_Host pointer. - * - * This is called from the interrupt handler, when a simulated INTFLY - * interrupt occurs. - */ - -static void -NCR53c7x0_intfly (struct Scsi_Host *host) -{ - NCR53c7x0_local_declare(); - struct NCR53c7x0_hostdata *hostdata; /* host->hostdata[0] */ - struct NCR53c7x0_cmd *cmd, /* command which halted */ - **cmd_prev_ptr; - unsigned long flags; - char search_found = 0; /* Got at least one ? */ - - hostdata = (struct NCR53c7x0_hostdata *) host->hostdata[0]; - NCR53c7x0_local_setup(host); - - if (hostdata->options & OPTION_DEBUG_INTR) - printk ("scsi%d : INTFLY\n", host->host_no); - - /* - * Traverse our list of running commands, and look - * for those with valid (non-0xff ff) status and message - * bytes encoded in the result which signify command - * completion. - */ - - local_irq_save(flags); -restart: - for (cmd_prev_ptr = (struct NCR53c7x0_cmd **)&(hostdata->running_list), - cmd = (struct NCR53c7x0_cmd *) hostdata->running_list; cmd ; - cmd_prev_ptr = (struct NCR53c7x0_cmd **) &(cmd->next), - cmd = (struct NCR53c7x0_cmd *) cmd->next) - { - Scsi_Cmnd *tmp; - - if (!cmd) { - printk("scsi%d : very weird.\n", host->host_no); - break; - } - - if (!(tmp = cmd->cmd)) { - printk("scsi%d : weird. NCR53c7x0_cmd has no Scsi_Cmnd\n", - host->host_no); - continue; - } - /* Copy the result over now; may not be complete, - * but subsequent tests may as well be done on - * cached memory. - */ - tmp->result = cmd->result; - - if (((tmp->result & 0xff) == 0xff) || - ((tmp->result & 0xff00) == 0xff00)) - continue; - - search_found = 1; - - if (cmd->bounce.len) - memcpy ((void *)cmd->bounce.addr, - (void *)cmd->bounce.buf, cmd->bounce.len); - - /* Important - remove from list _before_ done is called */ - if (cmd_prev_ptr) - *cmd_prev_ptr = (struct NCR53c7x0_cmd *) cmd->next; - - --hostdata->busy[tmp->device->id][tmp->device->lun]; - cmd->next = hostdata->free; - hostdata->free = cmd; - - tmp->host_scribble = NULL; - - if (hostdata->options & OPTION_DEBUG_INTR) { - printk ("scsi%d : command complete : pid %lu, id %d,lun %d result 0x%x ", - host->host_no, tmp->pid, tmp->device->id, tmp->device->lun, tmp->result); - __scsi_print_command (tmp->cmnd); - } - - tmp->scsi_done(tmp); - goto restart; - } - local_irq_restore(flags); - - if (!search_found) { - printk ("scsi%d : WARNING : INTFLY with no completed commands.\n", - host->host_no); - } else { - run_process_issue_queue(); - } - return; -} - -/* - * Function : static irqreturn_t NCR53c7x0_intr (int irq, void *dev_id) - * - * Purpose : handle NCR53c7x0 interrupts for all NCR devices sharing - * the same IRQ line. - * - * Inputs : Since we're using the IRQF_DISABLED interrupt handler - * semantics, irq indicates the interrupt which invoked - * this handler. - * - * On the 710 we simualte an INTFLY with a script interrupt, and the - * script interrupt handler will call back to this function. - */ - -static irqreturn_t -NCR53c7x0_intr (int irq, void *dev_id) -{ - NCR53c7x0_local_declare(); - struct Scsi_Host *host; /* Host we are looking at */ - unsigned char istat; /* Values of interrupt regs */ - struct NCR53c7x0_hostdata *hostdata; /* host->hostdata[0] */ - struct NCR53c7x0_cmd *cmd; /* command which halted */ - u32 *dsa; /* DSA */ - int handled = 0; - -#ifdef NCR_DEBUG - char buf[80]; /* Debugging sprintf buffer */ - size_t buflen; /* Length of same */ -#endif - - host = (struct Scsi_Host *)dev_id; - hostdata = (struct NCR53c7x0_hostdata *) host->hostdata[0]; - NCR53c7x0_local_setup(host); - - /* - * Only read istat once per loop, since reading it again will unstack - * interrupts - */ - - while ((istat = NCR53c7x0_read8(hostdata->istat)) & (ISTAT_SIP|ISTAT_DIP)) { - handled = 1; - hostdata->dsp_changed = 0; - hostdata->dstat_valid = 0; - hostdata->state = STATE_HALTED; - - if (NCR53c7x0_read8 (SSTAT2_REG) & SSTAT2_FF_MASK) - printk ("scsi%d : SCSI FIFO not empty\n", host->host_no); - - /* - * NCR53c700 and NCR53c700-66 change the current SCSI - * process, hostdata->ncrcurrent, in the Linux driver so - * cmd = hostdata->ncrcurrent. - * - * With other chips, we must look through the commands - * executing and find the command structure which - * corresponds to the DSA register. - */ - - if (hostdata->options & OPTION_700) { - cmd = (struct NCR53c7x0_cmd *) hostdata->ncrcurrent; - } else { - dsa = bus_to_virt(NCR53c7x0_read32(DSA_REG)); - for (cmd = (struct NCR53c7x0_cmd *) hostdata->running_list; - cmd && (dsa + (hostdata->dsa_start / sizeof(u32))) != cmd->dsa; - cmd = (struct NCR53c7x0_cmd *)(cmd->next)) - ; - } - if (hostdata->options & OPTION_DEBUG_INTR) { - if (cmd) { - printk("scsi%d : interrupt for pid %lu, id %d, lun %d ", - host->host_no, cmd->cmd->pid, (int) cmd->cmd->device->id, - (int) cmd->cmd->device->lun); - __scsi_print_command (cmd->cmd->cmnd); - } else { - printk("scsi%d : no active command\n", host->host_no); - } - } - - if (istat & ISTAT_SIP) { - if (hostdata->options & OPTION_DEBUG_INTR) - printk ("scsi%d : ISTAT_SIP\n", host->host_no); - intr_scsi (host, cmd); - } - - if (istat & ISTAT_DIP) { - if (hostdata->options & OPTION_DEBUG_INTR) - printk ("scsi%d : ISTAT_DIP\n", host->host_no); - intr_dma (host, cmd); - } - - if (!hostdata->dstat_valid) { - hostdata->dstat = NCR53c7x0_read8(DSTAT_REG); - hostdata->dstat_valid = 1; - } - - if (!(hostdata->dstat & DSTAT_DFE)) { - printk ("scsi%d : DMA FIFO not empty\n", host->host_no); - /* Really need to check this out for 710 RGH */ - NCR53c7x0_write8 (CTEST8_REG, CTEST8_10_CLF); - while (NCR53c7x0_read8 (CTEST8_REG) & CTEST8_10_CLF) - ; - hostdata->dstat |= DSTAT_DFE; - } - - if (!hostdata->idle && hostdata->state == STATE_HALTED) { - if (!hostdata->dsp_changed) - hostdata->dsp = (u32 *)bus_to_virt(NCR53c7x0_read32(DSP_REG)); -#if 0 - printk("scsi%d : new dsp is 0x%lx (virt 0x%p)\n", - host->host_no, virt_to_bus(hostdata->dsp), hostdata->dsp); -#endif - - hostdata->state = STATE_RUNNING; - NCR53c7x0_write32 (DSP_REG, virt_to_bus(hostdata->dsp)); - if (hostdata->options & OPTION_DEBUG_TRACE) { -#ifdef CYCLIC_TRACE - log_insn (hostdata->dsp); -#else - print_insn (host, hostdata->dsp, "t ", 1); -#endif - NCR53c7x0_write8 (DCNTL_REG, - hostdata->saved_dcntl | DCNTL_SSM | DCNTL_STD); - } - } - } - return IRQ_HANDLED; -} - - -/* - * Function : static int abort_connected (struct Scsi_Host *host) - * - * Purpose : Assuming that the NCR SCSI processor is currently - * halted, break the currently established nexus. Clean - * up of the NCR53c7x0_cmd and Scsi_Cmnd structures should - * be done on receipt of the abort interrupt. - * - * Inputs : host - SCSI host - * - */ - -static int -abort_connected (struct Scsi_Host *host) { -#ifdef NEW_ABORT - NCR53c7x0_local_declare(); -#endif - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; -/* FIXME : this probably should change for production kernels; at the - least, counter should move to a per-host structure. */ - static int counter = 5; -#ifdef NEW_ABORT - int sstat, phase, offset; - u32 *script; - NCR53c7x0_local_setup(host); -#endif - - if (--counter <= 0) { - disable(host); - return 0; - } - - printk ("scsi%d : DANGER : abort_connected() called \n", - host->host_no); - -#ifdef NEW_ABORT - -/* - * New strategy : Rather than using a generic abort routine, - * we'll specifically try to source or sink the appropriate - * amount of data for the phase we're currently in (taking into - * account the current synchronous offset) - */ - - sstat = NCR53c8x0_read8 (SSTAT2_REG); - offset = OFFSET (sstat & SSTAT2_FF_MASK) >> SSTAT2_FF_SHIFT; - phase = sstat & SSTAT2_PHASE_MASK; - -/* - * SET ATN - * MOVE source_or_sink, WHEN CURRENT PHASE - * < repeat for each outstanding byte > - * JUMP send_abort_message - */ - - script = hostdata->abort_script = kmalloc ( - 8 /* instruction size */ * ( - 1 /* set ATN */ + - (!offset ? 1 : offset) /* One transfer per outstanding byte */ + - 1 /* send abort message */), - GFP_ATOMIC); - - -#else /* def NEW_ABORT */ - hostdata->dsp = hostdata->script + hostdata->E_initiator_abort / - sizeof(u32); -#endif /* def NEW_ABORT */ - hostdata->dsp_changed = 1; - -/* XXX - need to flag the command as aborted after the abort_connected - code runs - */ - return 0; -} - -/* - * Function : static int datapath_residual (Scsi_Host *host) - * - * Purpose : return residual data count of what's in the chip. - * - * Inputs : host - SCSI host - */ - -static int -datapath_residual (struct Scsi_Host *host) { - NCR53c7x0_local_declare(); - int count, synchronous, sstat; - unsigned int ddir; - - NCR53c7x0_local_setup(host); - /* COMPAT : the 700 and 700-66 need to use DFIFO_00_BO_MASK */ - count = ((NCR53c7x0_read8 (DFIFO_REG) & DFIFO_10_BO_MASK) - - (NCR53c7x0_read32 (DBC_REG) & DFIFO_10_BO_MASK)) & DFIFO_10_BO_MASK; - synchronous = NCR53c7x0_read8 (SXFER_REG) & SXFER_MO_MASK; - /* COMPAT : DDIR is elsewhere on non-'8xx chips. */ - ddir = NCR53c7x0_read8 (CTEST0_REG_700) & CTEST0_700_DDIR; - - if (ddir) { - /* Receive */ - if (synchronous) - count += (NCR53c7x0_read8 (SSTAT2_REG) & SSTAT2_FF_MASK) >> SSTAT2_FF_SHIFT; - else - if (NCR53c7x0_read8 (SSTAT1_REG) & SSTAT1_ILF) - ++count; - } else { - /* Send */ - sstat = NCR53c7x0_read8 (SSTAT1_REG); - if (sstat & SSTAT1_OLF) - ++count; - if (synchronous && (sstat & SSTAT1_ORF)) - ++count; - } - return count; -} - -/* - * Function : static const char * sbcl_to_phase (int sbcl)_ - * - * Purpose : Convert SBCL register to user-parsable phase representation - * - * Inputs : sbcl - value of sbcl register - */ - - -static const char * -sbcl_to_phase (int sbcl) { - switch (sbcl & SBCL_PHASE_MASK) { - case SBCL_PHASE_DATAIN: - return "DATAIN"; - case SBCL_PHASE_DATAOUT: - return "DATAOUT"; - case SBCL_PHASE_MSGIN: - return "MSGIN"; - case SBCL_PHASE_MSGOUT: - return "MSGOUT"; - case SBCL_PHASE_CMDOUT: - return "CMDOUT"; - case SBCL_PHASE_STATIN: - return "STATUSIN"; - default: - return "unknown"; - } -} - -/* - * Function : static const char * sstat2_to_phase (int sstat)_ - * - * Purpose : Convert SSTAT2 register to user-parsable phase representation - * - * Inputs : sstat - value of sstat register - */ - - -static const char * -sstat2_to_phase (int sstat) { - switch (sstat & SSTAT2_PHASE_MASK) { - case SSTAT2_PHASE_DATAIN: - return "DATAIN"; - case SSTAT2_PHASE_DATAOUT: - return "DATAOUT"; - case SSTAT2_PHASE_MSGIN: - return "MSGIN"; - case SSTAT2_PHASE_MSGOUT: - return "MSGOUT"; - case SSTAT2_PHASE_CMDOUT: - return "CMDOUT"; - case SSTAT2_PHASE_STATIN: - return "STATUSIN"; - default: - return "unknown"; - } -} - -/* - * Function : static void intr_phase_mismatch (struct Scsi_Host *host, - * struct NCR53c7x0_cmd *cmd) - * - * Purpose : Handle phase mismatch interrupts - * - * Inputs : host, cmd - host and NCR command causing the interrupt, cmd - * may be NULL. - * - * Side effects : The abort_connected() routine is called or the NCR chip - * is restarted, jumping to the command_complete entry point, or - * patching the address and transfer count of the current instruction - * and calling the msg_in entry point as appropriate. - */ - -static void -intr_phase_mismatch (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd) { - NCR53c7x0_local_declare(); - u32 dbc_dcmd, *dsp, *dsp_next; - unsigned char dcmd, sbcl; - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - int residual; - enum {ACTION_ABORT, ACTION_ABORT_PRINT, ACTION_CONTINUE} action = - ACTION_ABORT_PRINT; - const char *where = NULL; - - NCR53c7x0_local_setup(host); - - /* - * Corrective action is based on where in the SCSI SCRIPT(tm) the error - * occurred, as well as which SCSI phase we are currently in. - */ - dsp_next = bus_to_virt(NCR53c7x0_read32(DSP_REG)); - - /* - * Fetch the current instruction, and remove the operands for easier - * interpretation. - */ - dbc_dcmd = NCR53c7x0_read32(DBC_REG); - dcmd = (dbc_dcmd & 0xff000000) >> 24; - /* - * Like other processors, the NCR adjusts the instruction pointer before - * instruction decode. Set the DSP address back to what it should - * be for this instruction based on its size (2 or 3 32 bit words). - */ - dsp = dsp_next - NCR53c7x0_insn_size(dcmd); - - - /* - * Read new SCSI phase from the SBCL lines. Since all of our code uses - * a WHEN conditional instead of an IF conditional, we don't need to - * wait for a new REQ. - */ - sbcl = NCR53c7x0_read8(SBCL_REG) & SBCL_PHASE_MASK; - - if (!cmd) { - action = ACTION_ABORT_PRINT; - where = "no current command"; - /* - * The way my SCSI SCRIPTS(tm) are architected, recoverable phase - * mismatches should only occur where we're doing a multi-byte - * BMI instruction. Specifically, this means - * - * - select messages (a SCSI-I target may ignore additional messages - * after the IDENTIFY; any target may reject a SDTR or WDTR) - * - * - command out (targets may send a message to signal an error - * condition, or go into STATUSIN after they've decided - * they don't like the command. - * - * - reply_message (targets may reject a multi-byte message in the - * middle) - * - * - data transfer routines (command completion with buffer space - * left, disconnect message, or error message) - */ - } else if (((dsp >= cmd->data_transfer_start && - dsp < cmd->data_transfer_end)) || dsp == (cmd->residual + 2)) { - if ((dcmd & (DCMD_TYPE_MASK|DCMD_BMI_OP_MASK|DCMD_BMI_INDIRECT| - DCMD_BMI_MSG|DCMD_BMI_CD)) == (DCMD_TYPE_BMI| - DCMD_BMI_OP_MOVE_I)) { - residual = datapath_residual (host); - if (hostdata->options & OPTION_DEBUG_DISCONNECT) - printk ("scsi%d : handling residual transfer (+ %d bytes from DMA FIFO)\n", - host->host_no, residual); - - /* - * The first instruction is a CALL to the alternate handler for - * this data transfer phase, so we can do calls to - * munge_msg_restart as we would if control were passed - * from normal dynamic code. - */ - if (dsp != cmd->residual + 2) { - cmd->residual[0] = ((DCMD_TYPE_TCI | DCMD_TCI_OP_CALL | - ((dcmd & DCMD_BMI_IO) ? DCMD_TCI_IO : 0)) << 24) | - DBC_TCI_WAIT_FOR_VALID | DBC_TCI_COMPARE_PHASE; - cmd->residual[1] = virt_to_bus(hostdata->script) - + ((dcmd & DCMD_BMI_IO) - ? hostdata->E_other_in : hostdata->E_other_out); - } - - /* - * The second instruction is the a data transfer block - * move instruction, reflecting the pointer and count at the - * time of the phase mismatch. - */ - cmd->residual[2] = dbc_dcmd + residual; - cmd->residual[3] = NCR53c7x0_read32(DNAD_REG) - residual; - - /* - * The third and final instruction is a jump to the instruction - * which follows the instruction which had to be 'split' - */ - if (dsp != cmd->residual + 2) { - cmd->residual[4] = ((DCMD_TYPE_TCI|DCMD_TCI_OP_JUMP) - << 24) | DBC_TCI_TRUE; - cmd->residual[5] = virt_to_bus(dsp_next); - } - - /* - * For the sake of simplicity, transfer control to the - * conditional CALL at the start of the residual buffer. - */ - hostdata->dsp = cmd->residual; - hostdata->dsp_changed = 1; - action = ACTION_CONTINUE; - } else { - where = "non-BMI dynamic DSA code"; - action = ACTION_ABORT_PRINT; - } - } else if (dsp == (hostdata->script + hostdata->E_select_msgout / 4 + 2)) { - /* RGH 290697: Added +2 above, to compensate for the script - * instruction which disables the selection timer. */ - /* Release ATN */ - NCR53c7x0_write8 (SOCL_REG, 0); - switch (sbcl) { - /* - * Some devices (SQ555 come to mind) grab the IDENTIFY message - * sent on selection, and decide to go into COMMAND OUT phase - * rather than accepting the rest of the messages or rejecting - * them. Handle these devices gracefully. - */ - case SBCL_PHASE_CMDOUT: - hostdata->dsp = dsp + 2 /* two _words_ */; - hostdata->dsp_changed = 1; - printk ("scsi%d : target %d ignored SDTR and went into COMMAND OUT\n", - host->host_no, cmd->cmd->device->id); - cmd->flags &= ~CMD_FLAG_SDTR; - action = ACTION_CONTINUE; - break; - case SBCL_PHASE_MSGIN: - hostdata->dsp = hostdata->script + hostdata->E_msg_in / - sizeof(u32); - hostdata->dsp_changed = 1; - action = ACTION_CONTINUE; - break; - default: - where="select message out"; - action = ACTION_ABORT_PRINT; - } - /* - * Some SCSI devices will interpret a command as they read the bytes - * off the SCSI bus, and may decide that the command is Bogus before - * they've read the entire command off the bus. - */ - } else if (dsp == hostdata->script + hostdata->E_cmdout_cmdout / sizeof - (u32)) { - hostdata->dsp = hostdata->script + hostdata->E_data_transfer / - sizeof (u32); - hostdata->dsp_changed = 1; - action = ACTION_CONTINUE; - /* FIXME : we need to handle message reject, etc. within msg_respond. */ -#ifdef notyet - } else if (dsp == hostdata->script + hostdata->E_reply_message) { - switch (sbcl) { - /* Any other phase mismatches abort the currently executing command. */ -#endif - } else { - where = "unknown location"; - action = ACTION_ABORT_PRINT; - } - - /* Flush DMA FIFO */ - if (!hostdata->dstat_valid) { - hostdata->dstat = NCR53c7x0_read8(DSTAT_REG); - hostdata->dstat_valid = 1; - } - if (!(hostdata->dstat & DSTAT_DFE)) { - /* Really need to check this out for 710 RGH */ - NCR53c7x0_write8 (CTEST8_REG, CTEST8_10_CLF); - while (NCR53c7x0_read8 (CTEST8_REG) & CTEST8_10_CLF); - hostdata->dstat |= DSTAT_DFE; - } - - switch (action) { - case ACTION_ABORT_PRINT: - printk("scsi%d : %s : unexpected phase %s.\n", - host->host_no, where ? where : "unknown location", - sbcl_to_phase(sbcl)); - print_lots (host); - /* Fall through to ACTION_ABORT */ - case ACTION_ABORT: - abort_connected (host); - break; - case ACTION_CONTINUE: - break; - } - -#if 0 - if (hostdata->dsp_changed) { - printk("scsi%d: new dsp 0x%p\n", host->host_no, hostdata->dsp); - print_insn (host, hostdata->dsp, "", 1); - } -#endif -} - -/* - * Function : static void intr_bf (struct Scsi_Host *host, - * struct NCR53c7x0_cmd *cmd) - * - * Purpose : handle BUS FAULT interrupts - * - * Inputs : host, cmd - host and NCR command causing the interrupt, cmd - * may be NULL. - */ - -static void -intr_bf (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd) { - NCR53c7x0_local_declare(); - u32 *dsp, - *next_dsp, /* Current dsp */ - *dsa, - dbc_dcmd; /* DCMD (high eight bits) + DBC */ - char *reason = NULL; - /* Default behavior is for a silent error, with a retry until we've - exhausted retries. */ - enum {MAYBE, ALWAYS, NEVER} retry = MAYBE; - int report = 0; - NCR53c7x0_local_setup(host); - - dbc_dcmd = NCR53c7x0_read32 (DBC_REG); - next_dsp = bus_to_virt (NCR53c7x0_read32(DSP_REG)); - dsp = next_dsp - NCR53c7x0_insn_size ((dbc_dcmd >> 24) & 0xff); -/* FIXME - check chip type */ - dsa = bus_to_virt (NCR53c7x0_read32(DSA_REG)); - - /* - * Bus faults can be caused by either a Bad Address or - * Target Abort. We should check the Received Target Abort - * bit of the PCI status register and Master Abort Bit. - * - * - Master Abort bit indicates that no device claimed - * the address with DEVSEL within five clocks - * - * - Target Abort bit indicates that a target claimed it, - * but changed its mind once it saw the byte enables. - * - */ - - /* 53c710, not PCI system */ - report = 1; - reason = "Unknown"; - -#ifndef notyet - report = 1; -#endif - if (report && reason) - { - printk(KERN_ALERT "scsi%d : BUS FAULT reason = %s\n", - host->host_no, reason ? reason : "unknown"); - print_lots (host); - } - -#ifndef notyet - retry = NEVER; -#endif - - /* - * TODO : we should attempt to recover from any spurious bus - * faults. After X retries, we should figure that things are - * sufficiently wedged, and call NCR53c7xx_reset. - * - * This code should only get executed once we've decided that we - * cannot retry. - */ - - if (retry == NEVER) { - printk(KERN_ALERT " mail richard@sleepie.demon.co.uk\n"); - FATAL (host); - } -} - -/* - * Function : static void intr_dma (struct Scsi_Host *host, - * struct NCR53c7x0_cmd *cmd) - * - * Purpose : handle all DMA interrupts, indicated by the setting - * of the DIP bit in the ISTAT register. - * - * Inputs : host, cmd - host and NCR command causing the interrupt, cmd - * may be NULL. - */ - -static void -intr_dma (struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd) { - NCR53c7x0_local_declare(); - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - unsigned char dstat; /* DSTAT */ - u32 *dsp, - *next_dsp, /* Current dsp */ - *dsa, - dbc_dcmd; /* DCMD (high eight bits) + DBC */ - int tmp; - unsigned long flags; - NCR53c7x0_local_setup(host); - - if (!hostdata->dstat_valid) { - hostdata->dstat = NCR53c7x0_read8(DSTAT_REG); - hostdata->dstat_valid = 1; - } - - dstat = hostdata->dstat; - - if (hostdata->options & OPTION_DEBUG_INTR) - printk("scsi%d : DSTAT=0x%x\n", host->host_no, (int) dstat); - - dbc_dcmd = NCR53c7x0_read32 (DBC_REG); - next_dsp = bus_to_virt(NCR53c7x0_read32(DSP_REG)); - dsp = next_dsp - NCR53c7x0_insn_size ((dbc_dcmd >> 24) & 0xff); -/* XXX - check chip type */ - dsa = bus_to_virt(NCR53c7x0_read32(DSA_REG)); - - /* - * DSTAT_ABRT is the aborted interrupt. This is set whenever the - * SCSI chip is aborted. - * - * With NCR53c700 and NCR53c700-66 style chips, we should only - * get this when the chip is currently running the accept - * reselect/select code and we have set the abort bit in the - * ISTAT register. - * - */ - - if (dstat & DSTAT_ABRT) { -#if 0 - /* XXX - add code here to deal with normal abort */ - if ((hostdata->options & OPTION_700) && (hostdata->state == - STATE_ABORTING)) { - } else -#endif - { - printk(KERN_ALERT "scsi%d : unexpected abort interrupt at\n" - " ", host->host_no); - print_insn (host, dsp, KERN_ALERT "s ", 1); - FATAL (host); - } - } - - /* - * DSTAT_SSI is the single step interrupt. Should be generated - * whenever we have single stepped or are tracing. - */ - - if (dstat & DSTAT_SSI) { - if (hostdata->options & OPTION_DEBUG_TRACE) { - /* Don't print instr. until we write DSP at end of intr function */ - } else if (hostdata->options & OPTION_DEBUG_SINGLE) { - print_insn (host, dsp, "s ", 0); - local_irq_save(flags); -/* XXX - should we do this, or can we get away with writing dsp? */ - - NCR53c7x0_write8 (DCNTL_REG, (NCR53c7x0_read8(DCNTL_REG) & - ~DCNTL_SSM) | DCNTL_STD); - local_irq_restore(flags); - } else { - printk(KERN_ALERT "scsi%d : unexpected single step interrupt at\n" - " ", host->host_no); - print_insn (host, dsp, KERN_ALERT "", 1); - printk(KERN_ALERT " mail drew@PoohSticks.ORG\n"); - FATAL (host); - } - } - - /* - * DSTAT_IID / DSTAT_OPC (same bit, same meaning, only the name - * is different) is generated whenever an illegal instruction is - * encountered. - * - * XXX - we may want to emulate INTFLY here, so we can use - * the same SCSI SCRIPT (tm) for NCR53c710 through NCR53c810 - * chips. - */ - - if (dstat & DSTAT_OPC) { - /* - * Ascertain if this IID interrupts occurred before or after a STO - * interrupt. Since the interrupt handling code now leaves - * DSP unmodified until _after_ all stacked interrupts have been - * processed, reading the DSP returns the original DSP register. - * This means that if dsp lies between the select code, and - * message out following the selection code (where the IID interrupt - * would have to have occurred by due to the implicit wait for REQ), - * we have an IID interrupt resulting from a STO condition and - * can ignore it. - */ - - if (((dsp >= (hostdata->script + hostdata->E_select / sizeof(u32))) && - (dsp <= (hostdata->script + hostdata->E_select_msgout / - sizeof(u32) + 8))) || (hostdata->test_running == 2)) { - if (hostdata->options & OPTION_DEBUG_INTR) - printk ("scsi%d : ignoring DSTAT_IID for SSTAT_STO\n", - host->host_no); - if (hostdata->expecting_iid) { - hostdata->expecting_iid = 0; - hostdata->idle = 1; - if (hostdata->test_running == 2) { - hostdata->test_running = 0; - hostdata->test_completed = 3; - } else if (cmd) - abnormal_finished (cmd, DID_BAD_TARGET << 16); - } else { - hostdata->expecting_sto = 1; - } - /* - * We can't guarantee we'll be able to execute the WAIT DISCONNECT - * instruction within the 3.4us of bus free and arbitration delay - * that a target can RESELECT in and assert REQ after we've dropped - * ACK. If this happens, we'll get an illegal instruction interrupt. - * Doing away with the WAIT DISCONNECT instructions broke everything, - * so instead I'll settle for moving one WAIT DISCONNECT a few - * instructions closer to the CLEAR ACK before it to minimize the - * chances of this happening, and handle it if it occurs anyway. - * - * Simply continue with what we were doing, and control should - * be transferred to the schedule routine which will ultimately - * pass control onto the reselection or selection (not yet) - * code. - */ - } else if (dbc_dcmd == 0x48000000 && (NCR53c7x0_read8 (SBCL_REG) & - SBCL_REQ)) { - if (!(hostdata->options & OPTION_NO_PRINT_RACE)) - { - printk("scsi%d: REQ before WAIT DISCONNECT IID\n", - host->host_no); - hostdata->options |= OPTION_NO_PRINT_RACE; - } - } else { - printk(KERN_ALERT "scsi%d : invalid instruction\n", host->host_no); - print_lots (host); - printk(KERN_ALERT " mail Richard@sleepie.demon.co.uk with ALL\n" - " boot messages and diagnostic output\n"); - FATAL (host); - } - } - - /* - * DSTAT_BF are bus fault errors. DSTAT_800_BF is valid for 710 also. - */ - - if (dstat & DSTAT_800_BF) { - intr_bf (host, cmd); - } - - - /* - * DSTAT_SIR interrupts are generated by the execution of - * the INT instruction. Since the exact values available - * are determined entirely by the SCSI script running, - * and are local to a particular script, a unique handler - * is called for each script. - */ - - if (dstat & DSTAT_SIR) { - if (hostdata->options & OPTION_DEBUG_INTR) - printk ("scsi%d : DSTAT_SIR\n", host->host_no); - switch ((tmp = hostdata->dstat_sir_intr (host, cmd))) { - case SPECIFIC_INT_NOTHING: - case SPECIFIC_INT_RESTART: - break; - case SPECIFIC_INT_ABORT: - abort_connected(host); - break; - case SPECIFIC_INT_PANIC: - printk(KERN_ALERT "scsi%d : failure at ", host->host_no); - print_insn (host, dsp, KERN_ALERT "", 1); - printk(KERN_ALERT " dstat_sir_intr() returned SPECIFIC_INT_PANIC\n"); - FATAL (host); - break; - case SPECIFIC_INT_BREAK: - intr_break (host, cmd); - break; - default: - printk(KERN_ALERT "scsi%d : failure at ", host->host_no); - print_insn (host, dsp, KERN_ALERT "", 1); - printk(KERN_ALERT" dstat_sir_intr() returned unknown value %d\n", - tmp); - FATAL (host); - } - } -} - -/* - * Function : static int print_insn (struct Scsi_Host *host, - * u32 *insn, int kernel) - * - * Purpose : print numeric representation of the instruction pointed - * to by insn to the debugging or kernel message buffer - * as appropriate. - * - * If desired, a user level program can interpret this - * information. - * - * Inputs : host, insn - host, pointer to instruction, prefix - - * string to prepend, kernel - use printk instead of debugging buffer. - * - * Returns : size, in u32s, of instruction printed. - */ - -/* - * FIXME: should change kernel parameter so that it takes an ENUM - * specifying severity - either KERN_ALERT or KERN_PANIC so - * all panic messages are output with the same severity. - */ - -static int -print_insn (struct Scsi_Host *host, const u32 *insn, - const char *prefix, int kernel) { - char buf[160], /* Temporary buffer and pointer. ICKY - arbitrary length. */ - - - *tmp; - unsigned char dcmd; /* dcmd register for *insn */ - int size; - - /* - * Check to see if the instruction pointer is not bogus before - * indirecting through it; avoiding red-zone at start of - * memory. - * - * FIXME: icky magic needs to happen here on non-intel boxes which - * don't have kernel memory mapped in like this. Might be reasonable - * to use vverify()? - */ - - if (virt_to_phys((void *)insn) < PAGE_SIZE || - virt_to_phys((void *)(insn + 8)) > virt_to_phys(high_memory) || - ((((dcmd = (insn[0] >> 24) & 0xff) & DCMD_TYPE_MMI) == DCMD_TYPE_MMI) && - virt_to_phys((void *)(insn + 12)) > virt_to_phys(high_memory))) { - size = 0; - sprintf (buf, "%s%p: address out of range\n", - prefix, insn); - } else { -/* - * FIXME : (void *) cast in virt_to_bus should be unnecessary, because - * it should take const void * as argument. - */ -#if !defined(CONFIG_MVME16x) && !defined(CONFIG_BVME6000) - sprintf(buf, "%s0x%lx (virt 0x%p) : 0x%08x 0x%08x (virt 0x%p)", - (prefix ? prefix : ""), virt_to_bus((void *) insn), insn, - insn[0], insn[1], bus_to_virt (insn[1])); -#else - /* Remove virtual addresses to reduce output, as they are the same */ - sprintf(buf, "%s0x%x (+%x) : 0x%08x 0x%08x", - (prefix ? prefix : ""), (u32)insn, ((u32)insn - - (u32)&(((struct NCR53c7x0_hostdata *)host->hostdata[0])->script))/4, - insn[0], insn[1]); -#endif - tmp = buf + strlen(buf); - if ((dcmd & DCMD_TYPE_MASK) == DCMD_TYPE_MMI) { -#if !defined(CONFIG_MVME16x) && !defined(CONFIG_BVME6000) - sprintf (tmp, " 0x%08x (virt 0x%p)\n", insn[2], - bus_to_virt(insn[2])); -#else - /* Remove virtual addr to reduce output, as it is the same */ - sprintf (tmp, " 0x%08x\n", insn[2]); -#endif - size = 3; - } else { - sprintf (tmp, "\n"); - size = 2; - } - } - - if (kernel) - printk ("%s", buf); -#ifdef NCR_DEBUG - else { - size_t len = strlen(buf); - debugger_kernel_write(host, buf, len); - } -#endif - return size; -} - -/* - * Function : int NCR53c7xx_abort (Scsi_Cmnd *cmd) - * - * Purpose : Abort an errant SCSI command, doing all necessary - * cleanup of the issue_queue, running_list, shared Linux/NCR - * dsa issue and reconnect queues. - * - * Inputs : cmd - command to abort, code - entire result field - * - * Returns : 0 on success, -1 on failure. - */ - -int -NCR53c7xx_abort (Scsi_Cmnd *cmd) { - NCR53c7x0_local_declare(); - struct Scsi_Host *host = cmd->device->host; - struct NCR53c7x0_hostdata *hostdata = host ? (struct NCR53c7x0_hostdata *) - host->hostdata[0] : NULL; - unsigned long flags; - struct NCR53c7x0_cmd *curr, **prev; - Scsi_Cmnd *me, **last; -#if 0 - static long cache_pid = -1; -#endif - - - if (!host) { - printk ("Bogus SCSI command pid %ld; no host structure\n", - cmd->pid); - return SCSI_ABORT_ERROR; - } else if (!hostdata) { - printk ("Bogus SCSI host %d; no hostdata\n", host->host_no); - return SCSI_ABORT_ERROR; - } - NCR53c7x0_local_setup(host); - -/* - * CHECK : I don't think that reading ISTAT will unstack any interrupts, - * since we need to write the INTF bit to clear it, and SCSI/DMA - * interrupts don't clear until we read SSTAT/SIST and DSTAT registers. - * - * See that this is the case. Appears to be correct on the 710, at least. - * - * I suspect that several of our failures may be coming from a new fatal - * interrupt (possibly due to a phase mismatch) happening after we've left - * the interrupt handler, but before the PIC has had the interrupt condition - * cleared. - */ - - if (NCR53c7x0_read8(hostdata->istat) & (ISTAT_DIP|ISTAT_SIP)) { - printk ("scsi%d : dropped interrupt for command %ld\n", host->host_no, - cmd->pid); - NCR53c7x0_intr (host->irq, NULL, NULL); - return SCSI_ABORT_BUSY; - } - - local_irq_save(flags); -#if 0 - if (cache_pid == cmd->pid) - panic ("scsi%d : bloody fetus %d\n", host->host_no, cmd->pid); - else - cache_pid = cmd->pid; -#endif - - -/* - * The command could be hiding in the issue_queue. This would be very - * nice, as commands can't be moved from the high level driver's issue queue - * into the shared queue until an interrupt routine is serviced, and this - * moving is atomic. - * - * If this is the case, we don't have to worry about anything - we simply - * pull the command out of the old queue, and call it aborted. - */ - - for (me = (Scsi_Cmnd *) hostdata->issue_queue, - last = (Scsi_Cmnd **) &(hostdata->issue_queue); - me && me != cmd; last = (Scsi_Cmnd **)&(me->SCp.ptr), - me = (Scsi_Cmnd *)me->SCp.ptr); - - if (me) { - *last = (Scsi_Cmnd *) me->SCp.ptr; - if (me->host_scribble) { - ((struct NCR53c7x0_cmd *)me->host_scribble)->next = hostdata->free; - hostdata->free = (struct NCR53c7x0_cmd *) me->host_scribble; - me->host_scribble = NULL; - } - cmd->result = DID_ABORT << 16; - cmd->scsi_done(cmd); - printk ("scsi%d : found command %ld in Linux issue queue\n", - host->host_no, me->pid); - local_irq_restore(flags); - run_process_issue_queue(); - return SCSI_ABORT_SUCCESS; - } - -/* - * That failing, the command could be in our list of already executing - * commands. If this is the case, drastic measures are called for. - */ - - for (curr = (struct NCR53c7x0_cmd *) hostdata->running_list, - prev = (struct NCR53c7x0_cmd **) &(hostdata->running_list); - curr && curr->cmd != cmd; prev = (struct NCR53c7x0_cmd **) - &(curr->next), curr = (struct NCR53c7x0_cmd *) curr->next); - - if (curr) { - if ((curr->result & 0xff) != 0xff && (curr->result & 0xff00) != 0xff00) { - cmd->result = curr->result; - if (prev) - *prev = (struct NCR53c7x0_cmd *) curr->next; - curr->next = (struct NCR53c7x0_cmd *) hostdata->free; - cmd->host_scribble = NULL; - hostdata->free = curr; - cmd->scsi_done(cmd); - printk ("scsi%d : found finished command %ld in running list\n", - host->host_no, cmd->pid); - local_irq_restore(flags); - return SCSI_ABORT_NOT_RUNNING; - } else { - printk ("scsi%d : DANGER : command running, can not abort.\n", - cmd->device->host->host_no); - local_irq_restore(flags); - return SCSI_ABORT_BUSY; - } - } - -/* - * And if we couldn't find it in any of our queues, it must have been - * a dropped interrupt. - */ - - curr = (struct NCR53c7x0_cmd *) cmd->host_scribble; - if (curr) { - curr->next = hostdata->free; - hostdata->free = curr; - cmd->host_scribble = NULL; - } - - if (curr == NULL || ((curr->result & 0xff00) == 0xff00) || - ((curr->result & 0xff) == 0xff)) { - printk ("scsi%d : did this command ever run?\n", host->host_no); - cmd->result = DID_ABORT << 16; - } else { - printk ("scsi%d : probably lost INTFLY, normal completion\n", - host->host_no); - cmd->result = curr->result; -/* - * FIXME : We need to add an additional flag which indicates if a - * command was ever counted as BUSY, so if we end up here we can - * decrement the busy count if and only if it is necessary. - */ - --hostdata->busy[cmd->device->id][cmd->device->lun]; - } - local_irq_restore(flags); - cmd->scsi_done(cmd); - -/* - * We need to run process_issue_queue since termination of this command - * may allow another queued command to execute first? - */ - return SCSI_ABORT_NOT_RUNNING; -} - -/* - * Function : int NCR53c7xx_reset (Scsi_Cmnd *cmd) - * - * Purpose : perform a hard reset of the SCSI bus and NCR - * chip. - * - * Inputs : cmd - command which caused the SCSI RESET - * - * Returns : 0 on success. - */ - -int -NCR53c7xx_reset (Scsi_Cmnd *cmd, unsigned int reset_flags) { - NCR53c7x0_local_declare(); - unsigned long flags; - int found = 0; - struct NCR53c7x0_cmd * c; - Scsi_Cmnd *tmp; - /* - * When we call scsi_done(), it's going to wake up anything sleeping on the - * resources which were in use by the aborted commands, and we'll start to - * get new commands. - * - * We can't let this happen until after we've re-initialized the driver - * structures, and can't reinitialize those structures until after we've - * dealt with their contents. - * - * So, we need to find all of the commands which were running, stick - * them on a linked list of completed commands (we'll use the host_scribble - * pointer), do our reinitialization, and then call the done function for - * each command. - */ - Scsi_Cmnd *nuke_list = NULL; - struct Scsi_Host *host = cmd->device->host; - struct NCR53c7x0_hostdata *hostdata = - (struct NCR53c7x0_hostdata *) host->hostdata[0]; - - NCR53c7x0_local_setup(host); - local_irq_save(flags); - ncr_halt (host); - print_lots (host); - dump_events (host, 30); - ncr_scsi_reset (host); - for (tmp = nuke_list = return_outstanding_commands (host, 1 /* free */, - 0 /* issue */ ); tmp; tmp = (Scsi_Cmnd *) tmp->SCp.buffer) - if (tmp == cmd) { - found = 1; - break; - } - - /* - * If we didn't find the command which caused this reset in our running - * list, then we've lost it. See that it terminates normally anyway. - */ - if (!found) { - c = (struct NCR53c7x0_cmd *) cmd->host_scribble; - if (c) { - cmd->host_scribble = NULL; - c->next = hostdata->free; - hostdata->free = c; - } else - printk ("scsi%d: lost command %ld\n", host->host_no, cmd->pid); - cmd->SCp.buffer = (struct scatterlist *) nuke_list; - nuke_list = cmd; - } - - NCR53c7x0_driver_init (host); - hostdata->soft_reset (host); - if (hostdata->resets == 0) - disable(host); - else if (hostdata->resets != -1) - --hostdata->resets; - local_irq_restore(flags); - for (; nuke_list; nuke_list = tmp) { - tmp = (Scsi_Cmnd *) nuke_list->SCp.buffer; - nuke_list->result = DID_RESET << 16; - nuke_list->scsi_done (nuke_list); - } - local_irq_restore(flags); - return SCSI_RESET_SUCCESS; -} - -/* - * The NCR SDMS bios follows Annex A of the SCSI-CAM draft, and - * therefore shares the scsicam_bios_param function. - */ - -/* - * Function : int insn_to_offset (Scsi_Cmnd *cmd, u32 *insn) - * - * Purpose : convert instructions stored at NCR pointer into data - * pointer offset. - * - * Inputs : cmd - SCSI command; insn - pointer to instruction. Either current - * DSP, or saved data pointer. - * - * Returns : offset on success, -1 on failure. - */ - - -static int -insn_to_offset (Scsi_Cmnd *cmd, u32 *insn) { - struct NCR53c7x0_hostdata *hostdata = - (struct NCR53c7x0_hostdata *) cmd->device->host->hostdata[0]; - struct NCR53c7x0_cmd *ncmd = - (struct NCR53c7x0_cmd *) cmd->host_scribble; - int offset = 0, buffers; - struct scatterlist *segment; - char *ptr; - int found = 0; - -/* - * With the current code implementation, if the insn is inside dynamically - * generated code, the data pointer will be the instruction preceding - * the next transfer segment. - */ - - if (!check_address ((unsigned long) ncmd, sizeof (struct NCR53c7x0_cmd)) && - ((insn >= ncmd->data_transfer_start && - insn < ncmd->data_transfer_end) || - (insn >= ncmd->residual && - insn < (ncmd->residual + - sizeof(ncmd->residual))))) { - ptr = bus_to_virt(insn[3]); - - if ((buffers = cmd->use_sg)) { - for (offset = 0, - segment = (struct scatterlist *) cmd->request_buffer; - buffers && !((found = ((ptr >= (char *)page_address(segment->page)+segment->offset) && - (ptr < ((char *)page_address(segment->page)+segment->offset+segment->length))))); - --buffers, offset += segment->length, ++segment) -#if 0 - printk("scsi%d: comparing 0x%p to 0x%p\n", - cmd->device->host->host_no, saved, page_address(segment->page+segment->offset)); -#else - ; -#endif - offset += ptr - ((char *)page_address(segment->page)+segment->offset); - } else { - found = 1; - offset = ptr - (char *) (cmd->request_buffer); - } - } else if ((insn >= hostdata->script + - hostdata->E_data_transfer / sizeof(u32)) && - (insn <= hostdata->script + - hostdata->E_end_data_transfer / sizeof(u32))) { - found = 1; - offset = 0; - } - return found ? offset : -1; -} - - - -/* - * Function : void print_progress (Scsi_Cmnd *cmd) - * - * Purpose : print the current location of the saved data pointer - * - * Inputs : cmd - command we are interested in - * - */ - -static void -print_progress (Scsi_Cmnd *cmd) { - NCR53c7x0_local_declare(); - struct NCR53c7x0_cmd *ncmd = - (struct NCR53c7x0_cmd *) cmd->host_scribble; - int offset, i; - char *where; - u32 *ptr; - NCR53c7x0_local_setup (cmd->device->host); - - if (check_address ((unsigned long) ncmd,sizeof (struct NCR53c7x0_cmd)) == 0) - { - printk("\nNCR53c7x0_cmd fields:\n"); - printk(" bounce.len=0x%x, addr=0x%0x, buf[]=0x%02x %02x %02x %02x\n", - ncmd->bounce.len, ncmd->bounce.addr, ncmd->bounce.buf[0], - ncmd->bounce.buf[1], ncmd->bounce.buf[2], ncmd->bounce.buf[3]); - printk(" result=%04x, cdb[0]=0x%02x\n", ncmd->result, ncmd->cmnd[0]); - } - - for (i = 0; i < 2; ++i) { - if (check_address ((unsigned long) ncmd, - sizeof (struct NCR53c7x0_cmd)) == -1) - continue; - if (!i) { - where = "saved"; - ptr = bus_to_virt(ncmd->saved_data_pointer); - } else { - where = "active"; - ptr = bus_to_virt (NCR53c7x0_read32 (DSP_REG) - - NCR53c7x0_insn_size (NCR53c7x0_read8 (DCMD_REG)) * - sizeof(u32)); - } - offset = insn_to_offset (cmd, ptr); - - if (offset != -1) - printk ("scsi%d : %s data pointer at offset %d\n", - cmd->device->host->host_no, where, offset); - else { - int size; - printk ("scsi%d : can't determine %s data pointer offset\n", - cmd->device->host->host_no, where); - if (ncmd) { - size = print_insn (cmd->device->host, - bus_to_virt(ncmd->saved_data_pointer), "", 1); - print_insn (cmd->device->host, - bus_to_virt(ncmd->saved_data_pointer) + size * sizeof(u32), - "", 1); - } - } - } -} - - -static void -print_dsa (struct Scsi_Host *host, u32 *dsa, const char *prefix) { - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - int i, len; - char *ptr; - Scsi_Cmnd *cmd; - - if (check_address ((unsigned long) dsa, hostdata->dsa_end - - hostdata->dsa_start) == -1) { - printk("scsi%d : bad dsa virt 0x%p\n", host->host_no, dsa); - return; - } - printk("%sscsi%d : dsa at phys 0x%lx (virt 0x%p)\n" - " + %d : dsa_msgout length = %u, data = 0x%x (virt 0x%p)\n" , - prefix ? prefix : "", - host->host_no, virt_to_bus (dsa), dsa, hostdata->dsa_msgout, - dsa[hostdata->dsa_msgout / sizeof(u32)], - dsa[hostdata->dsa_msgout / sizeof(u32) + 1], - bus_to_virt (dsa[hostdata->dsa_msgout / sizeof(u32) + 1])); - - /* - * Only print messages if they're sane in length so we don't - * blow the kernel printk buffer on something which won't buy us - * anything. - */ - - if (dsa[hostdata->dsa_msgout / sizeof(u32)] < - sizeof (hostdata->free->select)) - for (i = dsa[hostdata->dsa_msgout / sizeof(u32)], - ptr = bus_to_virt (dsa[hostdata->dsa_msgout / sizeof(u32) + 1]); - i > 0 && !check_address ((unsigned long) ptr, 1); - ptr += len, i -= len) { - printk(" "); - len = spi_print_msg(ptr); - printk("\n"); - if (!len) - break; - } - - printk(" + %d : select_indirect = 0x%x\n", - hostdata->dsa_select, dsa[hostdata->dsa_select / sizeof(u32)]); - cmd = (Scsi_Cmnd *) bus_to_virt(dsa[hostdata->dsa_cmnd / sizeof(u32)]); - printk(" + %d : dsa_cmnd = 0x%x ", hostdata->dsa_cmnd, - (u32) virt_to_bus(cmd)); - /* XXX Maybe we should access cmd->host_scribble->result here. RGH */ - if (cmd) { - printk(" result = 0x%x, target = %d, lun = %d, cmd = ", - cmd->result, cmd->device->id, cmd->device->lun); - __scsi_print_command(cmd->cmnd); - } else - printk("\n"); - printk(" + %d : dsa_next = 0x%x\n", hostdata->dsa_next, - dsa[hostdata->dsa_next / sizeof(u32)]); - if (cmd) { - printk("scsi%d target %d : sxfer_sanity = 0x%x, scntl3_sanity = 0x%x\n" - " script : ", - host->host_no, cmd->device->id, - hostdata->sync[cmd->device->id].sxfer_sanity, - hostdata->sync[cmd->device->id].scntl3_sanity); - for (i = 0; i < (sizeof(hostdata->sync[cmd->device->id].script) / 4); ++i) - printk ("0x%x ", hostdata->sync[cmd->device->id].script[i]); - printk ("\n"); - print_progress (cmd); - } -} -/* - * Function : void print_queues (Scsi_Host *host) - * - * Purpose : print the contents of the NCR issue and reconnect queues - * - * Inputs : host - SCSI host we are interested in - * - */ - -static void -print_queues (struct Scsi_Host *host) { - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - u32 *dsa, *next_dsa; - volatile u32 *ncrcurrent; - int left; - Scsi_Cmnd *cmd, *next_cmd; - unsigned long flags; - - printk ("scsi%d : issue queue\n", host->host_no); - - for (left = host->can_queue, cmd = (Scsi_Cmnd *) hostdata->issue_queue; - left >= 0 && cmd; - cmd = next_cmd) { - next_cmd = (Scsi_Cmnd *) cmd->SCp.ptr; - local_irq_save(flags); - if (cmd->host_scribble) { - if (check_address ((unsigned long) (cmd->host_scribble), - sizeof (cmd->host_scribble)) == -1) - printk ("scsi%d: scsi pid %ld bad pointer to NCR53c7x0_cmd\n", - host->host_no, cmd->pid); - /* print_dsa does sanity check on address, no need to check */ - else - print_dsa (host, ((struct NCR53c7x0_cmd *) cmd->host_scribble) - -> dsa, ""); - } else - printk ("scsi%d : scsi pid %ld for target %d lun %d has no NCR53c7x0_cmd\n", - host->host_no, cmd->pid, cmd->device->id, cmd->device->lun); - local_irq_restore(flags); - } - - if (left <= 0) { - printk ("scsi%d : loop detected in issue queue\n", - host->host_no); - } - - /* - * Traverse the NCR reconnect and start DSA structures, printing out - * each element until we hit the end or detect a loop. Currently, - * the reconnect structure is a linked list; and the start structure - * is an array. Eventually, the reconnect structure will become a - * list as well, since this simplifies the code. - */ - - printk ("scsi%d : schedule dsa array :\n", host->host_no); - for (left = host->can_queue, ncrcurrent = hostdata->schedule; - left > 0; ncrcurrent += 2, --left) - if (ncrcurrent[0] != hostdata->NOP_insn) -/* FIXME : convert pointer to dsa_begin to pointer to dsa. */ - print_dsa (host, bus_to_virt (ncrcurrent[1] - - (hostdata->E_dsa_code_begin - - hostdata->E_dsa_code_template)), ""); - printk ("scsi%d : end schedule dsa array\n", host->host_no); - - printk ("scsi%d : reconnect_dsa_head :\n", host->host_no); - - for (left = host->can_queue, - dsa = bus_to_virt (hostdata->reconnect_dsa_head); - left >= 0 && dsa; - dsa = next_dsa) { - local_irq_save(flags); - if (check_address ((unsigned long) dsa, sizeof(dsa)) == -1) { - printk ("scsi%d: bad DSA pointer 0x%p", host->host_no, - dsa); - next_dsa = NULL; - } - else - { - next_dsa = bus_to_virt(dsa[hostdata->dsa_next / sizeof(u32)]); - print_dsa (host, dsa, ""); - } - local_irq_restore(flags); - } - printk ("scsi%d : end reconnect_dsa_head\n", host->host_no); - if (left < 0) - printk("scsi%d: possible loop in ncr reconnect list\n", - host->host_no); -} - -static void -print_lots (struct Scsi_Host *host) { - NCR53c7x0_local_declare(); - struct NCR53c7x0_hostdata *hostdata = - (struct NCR53c7x0_hostdata *) host->hostdata[0]; - u32 *dsp_next, *dsp, *dsa, dbc_dcmd; - unsigned char dcmd, sbcl; - int i, size; - NCR53c7x0_local_setup(host); - - if ((dsp_next = bus_to_virt(NCR53c7x0_read32 (DSP_REG)))) { - dbc_dcmd = NCR53c7x0_read32(DBC_REG); - dcmd = (dbc_dcmd & 0xff000000) >> 24; - dsp = dsp_next - NCR53c7x0_insn_size(dcmd); - dsa = bus_to_virt(NCR53c7x0_read32(DSA_REG)); - sbcl = NCR53c7x0_read8 (SBCL_REG); - - /* - * For the 53c710, the following will report value 0 for SCNTL3 - * and STEST0 - we don't have these registers. - */ - printk ("scsi%d : DCMD|DBC=0x%x, DNAD=0x%x (virt 0x%p)\n" - " DSA=0x%lx (virt 0x%p)\n" - " DSPS=0x%x, TEMP=0x%x (virt 0x%p), DMODE=0x%x\n" - " SXFER=0x%x, SCNTL3=0x%x\n" - " %s%s%sphase=%s, %d bytes in SCSI FIFO\n" - " SCRATCH=0x%x, saved2_dsa=0x%0lx\n", - host->host_no, dbc_dcmd, NCR53c7x0_read32(DNAD_REG), - bus_to_virt(NCR53c7x0_read32(DNAD_REG)), - virt_to_bus(dsa), dsa, - NCR53c7x0_read32(DSPS_REG), NCR53c7x0_read32(TEMP_REG), - bus_to_virt (NCR53c7x0_read32(TEMP_REG)), - (int) NCR53c7x0_read8(hostdata->dmode), - (int) NCR53c7x0_read8(SXFER_REG), - ((hostdata->chip / 100) == 8) ? - (int) NCR53c7x0_read8(SCNTL3_REG_800) : 0, - (sbcl & SBCL_BSY) ? "BSY " : "", - (sbcl & SBCL_SEL) ? "SEL " : "", - (sbcl & SBCL_REQ) ? "REQ " : "", - sstat2_to_phase(NCR53c7x0_read8 (((hostdata->chip / 100) == 8) ? - SSTAT1_REG : SSTAT2_REG)), - (NCR53c7x0_read8 ((hostdata->chip / 100) == 8 ? - SSTAT1_REG : SSTAT2_REG) & SSTAT2_FF_MASK) >> SSTAT2_FF_SHIFT, - ((hostdata->chip / 100) == 8) ? NCR53c7x0_read8 (STEST0_REG_800) : - NCR53c7x0_read32(SCRATCHA_REG_800), - hostdata->saved2_dsa); - printk ("scsi%d : DSP 0x%lx (virt 0x%p) ->\n", host->host_no, - virt_to_bus(dsp), dsp); - for (i = 6; i > 0; --i, dsp += size) - size = print_insn (host, dsp, "", 1); - if (NCR53c7x0_read8 (SCNTL1_REG) & SCNTL1_CON) { - if ((hostdata->chip / 100) == 8) - printk ("scsi%d : connected (SDID=0x%x, SSID=0x%x)\n", - host->host_no, NCR53c7x0_read8 (SDID_REG_800), - NCR53c7x0_read8 (SSID_REG_800)); - else - printk ("scsi%d : connected (SDID=0x%x)\n", - host->host_no, NCR53c7x0_read8 (SDID_REG_700)); - print_dsa (host, dsa, ""); - } - -#if 1 - print_queues (host); -#endif - } -} - -/* - * Function : static int shutdown (struct Scsi_Host *host) - * - * Purpose : does a clean (we hope) shutdown of the NCR SCSI - * chip. Use prior to dumping core, unloading the NCR driver, - * - * Returns : 0 on success - */ -static int -shutdown (struct Scsi_Host *host) { - NCR53c7x0_local_declare(); - unsigned long flags; - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - NCR53c7x0_local_setup(host); - local_irq_save(flags); -/* Get in a state where we can reset the SCSI bus */ - ncr_halt (host); - ncr_scsi_reset (host); - hostdata->soft_reset(host); - - disable (host); - local_irq_restore(flags); - return 0; -} - -/* - * Function : void ncr_scsi_reset (struct Scsi_Host *host) - * - * Purpose : reset the SCSI bus. - */ - -static void -ncr_scsi_reset (struct Scsi_Host *host) { - NCR53c7x0_local_declare(); - unsigned long flags; - NCR53c7x0_local_setup(host); - local_irq_save(flags); - NCR53c7x0_write8(SCNTL1_REG, SCNTL1_RST); - udelay(25); /* Minimum amount of time to assert RST */ - NCR53c7x0_write8(SCNTL1_REG, 0); - local_irq_restore(flags); -} - -/* - * Function : void hard_reset (struct Scsi_Host *host) - * - */ - -static void -hard_reset (struct Scsi_Host *host) { - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - unsigned long flags; - local_irq_save(flags); - ncr_scsi_reset(host); - NCR53c7x0_driver_init (host); - if (hostdata->soft_reset) - hostdata->soft_reset (host); - local_irq_restore(flags); -} - - -/* - * Function : Scsi_Cmnd *return_outstanding_commands (struct Scsi_Host *host, - * int free, int issue) - * - * Purpose : return a linked list (using the SCp.buffer field as next, - * so we don't perturb hostdata. We don't use a field of the - * NCR53c7x0_cmd structure since we may not have allocated one - * for the command causing the reset.) of Scsi_Cmnd structures that - * had propagated below the Linux issue queue level. If free is set, - * free the NCR53c7x0_cmd structures which are associated with - * the Scsi_Cmnd structures, and clean up any internal - * NCR lists that the commands were on. If issue is set, - * also return commands in the issue queue. - * - * Returns : linked list of commands - * - * NOTE : the caller should insure that the NCR chip is halted - * if the free flag is set. - */ - -static Scsi_Cmnd * -return_outstanding_commands (struct Scsi_Host *host, int free, int issue) { - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - struct NCR53c7x0_cmd *c; - int i; - u32 *ncrcurrent; - Scsi_Cmnd *list = NULL, *tmp; - for (c = (struct NCR53c7x0_cmd *) hostdata->running_list; c; - c = (struct NCR53c7x0_cmd *) c->next) { - if (c->cmd->SCp.buffer) { - printk ("scsi%d : loop detected in running list!\n", host->host_no); - break; - } else { - printk ("Duh? Bad things happening in the NCR driver\n"); - break; - } - - c->cmd->SCp.buffer = (struct scatterlist *) list; - list = c->cmd; - if (free) { - c->next = hostdata->free; - hostdata->free = c; - } - } - - if (free) { - for (i = 0, ncrcurrent = (u32 *) hostdata->schedule; - i < host->can_queue; ++i, ncrcurrent += 2) { - ncrcurrent[0] = hostdata->NOP_insn; - ncrcurrent[1] = 0xdeadbeef; - } - hostdata->ncrcurrent = NULL; - } - - if (issue) { - for (tmp = (Scsi_Cmnd *) hostdata->issue_queue; tmp; tmp = tmp->next) { - if (tmp->SCp.buffer) { - printk ("scsi%d : loop detected in issue queue!\n", - host->host_no); - break; - } - tmp->SCp.buffer = (struct scatterlist *) list; - list = tmp; - } - if (free) - hostdata->issue_queue = NULL; - - } - return list; -} - -/* - * Function : static int disable (struct Scsi_Host *host) - * - * Purpose : disables the given NCR host, causing all commands - * to return a driver error. Call this so we can unload the - * module during development and try again. Eventually, - * we should be able to find clean workarounds for these - * problems. - * - * Inputs : host - hostadapter to twiddle - * - * Returns : 0 on success. - */ - -static int -disable (struct Scsi_Host *host) { - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - unsigned long flags; - Scsi_Cmnd *nuke_list, *tmp; - local_irq_save(flags); - if (hostdata->state != STATE_HALTED) - ncr_halt (host); - nuke_list = return_outstanding_commands (host, 1 /* free */, 1 /* issue */); - hard_reset (host); - hostdata->state = STATE_DISABLED; - local_irq_restore(flags); - printk ("scsi%d : nuking commands\n", host->host_no); - for (; nuke_list; nuke_list = tmp) { - tmp = (Scsi_Cmnd *) nuke_list->SCp.buffer; - nuke_list->result = DID_ERROR << 16; - nuke_list->scsi_done(nuke_list); - } - printk ("scsi%d : done. \n", host->host_no); - printk (KERN_ALERT "scsi%d : disabled. Unload and reload\n", - host->host_no); - return 0; -} - -/* - * Function : static int ncr_halt (struct Scsi_Host *host) - * - * Purpose : halts the SCSI SCRIPTS(tm) processor on the NCR chip - * - * Inputs : host - SCSI chip to halt - * - * Returns : 0 on success - */ - -static int -ncr_halt (struct Scsi_Host *host) { - NCR53c7x0_local_declare(); - unsigned long flags; - unsigned char istat, tmp; - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - int stage; - NCR53c7x0_local_setup(host); - - local_irq_save(flags); - /* Stage 0 : eat all interrupts - Stage 1 : set ABORT - Stage 2 : eat all but abort interrupts - Stage 3 : eat all interrupts - */ - for (stage = 0;;) { - if (stage == 1) { - NCR53c7x0_write8(hostdata->istat, ISTAT_ABRT); - ++stage; - } - istat = NCR53c7x0_read8 (hostdata->istat); - if (istat & ISTAT_SIP) { - tmp = NCR53c7x0_read8(SSTAT0_REG); - } else if (istat & ISTAT_DIP) { - tmp = NCR53c7x0_read8(DSTAT_REG); - if (stage == 2) { - if (tmp & DSTAT_ABRT) { - NCR53c7x0_write8(hostdata->istat, 0); - ++stage; - } else { - printk(KERN_ALERT "scsi%d : could not halt NCR chip\n", - host->host_no); - disable (host); - } - } - } - if (!(istat & (ISTAT_SIP|ISTAT_DIP))) { - if (stage == 0) - ++stage; - else if (stage == 3) - break; - } - } - hostdata->state = STATE_HALTED; - local_irq_restore(flags); -#if 0 - print_lots (host); -#endif - return 0; -} - -/* - * Function: event_name (int event) - * - * Purpose: map event enum into user-readable strings. - */ - -static const char * -event_name (int event) { - switch (event) { - case EVENT_NONE: return "none"; - case EVENT_ISSUE_QUEUE: return "to issue queue"; - case EVENT_START_QUEUE: return "to start queue"; - case EVENT_SELECT: return "selected"; - case EVENT_DISCONNECT: return "disconnected"; - case EVENT_RESELECT: return "reselected"; - case EVENT_COMPLETE: return "completed"; - case EVENT_IDLE: return "idle"; - case EVENT_SELECT_FAILED: return "select failed"; - case EVENT_BEFORE_SELECT: return "before select"; - case EVENT_RESELECT_FAILED: return "reselect failed"; - default: return "unknown"; - } -} - -/* - * Function : void dump_events (struct Scsi_Host *host, count) - * - * Purpose : print last count events which have occurred. - */ -static void -dump_events (struct Scsi_Host *host, int count) { - struct NCR53c7x0_hostdata *hostdata = (struct NCR53c7x0_hostdata *) - host->hostdata[0]; - struct NCR53c7x0_event event; - int i; - unsigned long flags; - if (hostdata->events) { - if (count > hostdata->event_size) - count = hostdata->event_size; - for (i = hostdata->event_index; count > 0; - i = (i ? i - 1 : hostdata->event_size -1), --count) { -/* - * By copying the event we're currently examining with interrupts - * disabled, we can do multiple printk(), etc. operations and - * still be guaranteed that they're happening on the same - * event structure. - */ - local_irq_save(flags); -#if 0 - event = hostdata->events[i]; -#else - memcpy ((void *) &event, (void *) &(hostdata->events[i]), - sizeof(event)); -#endif - - local_irq_restore(flags); - printk ("scsi%d : %s event %d at %ld secs %ld usecs target %d lun %d\n", - host->host_no, event_name (event.event), count, - (long) event.time.tv_sec, (long) event.time.tv_usec, - event.target, event.lun); - if (event.dsa) - printk (" event for dsa 0x%lx (virt 0x%p)\n", - virt_to_bus(event.dsa), event.dsa); - if (event.pid != -1) { - printk (" event for pid %ld ", event.pid); - __scsi_print_command (event.cmnd); - } - } - } -} - -/* - * Function: check_address - * - * Purpose: Check to see if a possibly corrupt pointer will fault the - * kernel. - * - * Inputs: addr - address; size - size of area - * - * Returns: 0 if area is OK, -1 on error. - * - * NOTES: should be implemented in terms of vverify on kernels - * that have it. - */ - -static int -check_address (unsigned long addr, int size) { - return (virt_to_phys((void *)addr) < PAGE_SIZE || virt_to_phys((void *)(addr + size)) > virt_to_phys(high_memory) ? -1 : 0); -} - -#ifdef MODULE -int -NCR53c7x0_release(struct Scsi_Host *host) { - struct NCR53c7x0_hostdata *hostdata = - (struct NCR53c7x0_hostdata *) host->hostdata[0]; - struct NCR53c7x0_cmd *cmd, *tmp; - shutdown (host); - if (host->irq != SCSI_IRQ_NONE) - { - int irq_count; - struct Scsi_Host *tmp; - for (irq_count = 0, tmp = first_host; tmp; tmp = tmp->next) - if (tmp->hostt == the_template && tmp->irq == host->irq) - ++irq_count; - if (irq_count == 1) - free_irq(host->irq, NULL); - } - if (host->dma_channel != DMA_NONE) - free_dma(host->dma_channel); - if (host->io_port) - release_region(host->io_port, host->n_io_port); - - for (cmd = (struct NCR53c7x0_cmd *) hostdata->free; cmd; cmd = tmp, - --hostdata->num_cmds) { - tmp = (struct NCR53c7x0_cmd *) cmd->next; - /* - * If we're going to loop, try to stop it to get a more accurate - * count of the leaked commands. - */ - cmd->next = NULL; - if (cmd->free) - cmd->free ((void *) cmd->real, cmd->size); - } - if (hostdata->num_cmds) - printk ("scsi%d : leaked %d NCR53c7x0_cmd structures\n", - host->host_no, hostdata->num_cmds); - - vfree(hostdata->events); - - /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING, which - * XXX may be invalid (CONFIG_060_WRITETHROUGH) - */ - kernel_set_cachemode((void *)hostdata, 8192, IOMAP_FULL_CACHING); - free_pages ((u32)hostdata, 1); - return 1; -} -#endif /* def MODULE */ diff --git a/drivers/scsi/53c7xx.h b/drivers/scsi/53c7xx.h deleted file mode 100644 index 218f3b90153..00000000000 --- a/drivers/scsi/53c7xx.h +++ /dev/null @@ -1,1608 +0,0 @@ -/* - * 53c710 driver. Modified from Drew Eckhardts driver - * for 53c810 by Richard Hirst [richard@sleepie.demon.co.uk] - * - * I have left the code for the 53c8xx family in here, because it didn't - * seem worth removing it. The possibility of IO_MAPPED chips rather - * than MEMORY_MAPPED remains, in case someone wants to add support for - * 53c710 chips on Intel PCs (some older machines have them on the - * motherboard). - * - * NOTE THERE MAY BE PROBLEMS WITH CASTS IN read8 AND Co. - */ - -/* - * NCR 53c{7,8}0x0 driver, header file - * - * Sponsored by - * iX Multiuser Multitasking Magazine - * Hannover, Germany - * hm@ix.de - * - * Copyright 1993, 1994, 1995 Drew Eckhardt - * Visionary Computing - * (Unix and Linux consulting and custom programming) - * drew@PoohSticks.ORG - * +1 (303) 786-7975 - * - * TolerANT and SCSI SCRIPTS are registered trademarks of NCR Corporation. - * - * PRE-ALPHA - * - * For more information, please consult - * - * NCR 53C700/53C700-66 - * SCSI I/O Processor - * Data Manual - * - * NCR 53C810 - * PCI-SCSI I/O Processor - * Data Manual - * - * NCR Microelectronics - * 1635 Aeroplaza Drive - * Colorado Springs, CO 80916 - * +1 (719) 578-3400 - * - * Toll free literature number - * +1 (800) 334-5454 - * - */ - -#ifndef NCR53c710_H -#define NCR53c710_H - -#ifndef HOSTS_C - -/* SCSI control 0 rw, default = 0xc0 */ -#define SCNTL0_REG 0x00 -#define SCNTL0_ARB1 0x80 /* 0 0 = simple arbitration */ -#define SCNTL0_ARB2 0x40 /* 1 1 = full arbitration */ -#define SCNTL0_STRT 0x20 /* Start Sequence */ -#define SCNTL0_WATN 0x10 /* Select with ATN */ -#define SCNTL0_EPC 0x08 /* Enable parity checking */ -/* Bit 2 is reserved on 800 series chips */ -#define SCNTL0_EPG_700 0x04 /* Enable parity generation */ -#define SCNTL0_AAP 0x02 /* ATN/ on parity error */ -#define SCNTL0_TRG 0x01 /* Target mode */ - -/* SCSI control 1 rw, default = 0x00 */ - -#define SCNTL1_REG 0x01 -#define SCNTL1_EXC 0x80 /* Extra Clock Cycle of Data setup */ -#define SCNTL1_ADB 0x40 /* contents of SODL on bus */ -#define SCNTL1_ESR_700 0x20 /* Enable SIOP response to selection - and reselection */ -#define SCNTL1_DHP_800 0x20 /* Disable halt on parity error or ATN - target mode only */ -#define SCNTL1_CON 0x10 /* Connected */ -#define SCNTL1_RST 0x08 /* SCSI RST/ */ -#define SCNTL1_AESP 0x04 /* Force bad parity */ -#define SCNTL1_SND_700 0x02 /* Start SCSI send */ -#define SCNTL1_IARB_800 0x02 /* Immediate Arbitration, start - arbitration immediately after - busfree is detected */ -#define SCNTL1_RCV_700 0x01 /* Start SCSI receive */ -#define SCNTL1_SST_800 0x01 /* Start SCSI transfer */ - -/* SCSI control 2 rw, */ - -#define SCNTL2_REG_800 0x02 -#define SCNTL2_800_SDU 0x80 /* SCSI disconnect unexpected */ - -/* SCSI control 3 rw */ - -#define SCNTL3_REG_800 0x03 -#define SCNTL3_800_SCF_SHIFT 4 -#define SCNTL3_800_SCF_MASK 0x70 -#define SCNTL3_800_SCF2 0x40 /* Synchronous divisor */ -#define SCNTL3_800_SCF1 0x20 /* 0x00 = SCLK/3 */ -#define SCNTL3_800_SCF0 0x10 /* 0x10 = SCLK/1 */ - /* 0x20 = SCLK/1.5 - 0x30 = SCLK/2 - 0x40 = SCLK/3 */ - -#define SCNTL3_800_CCF_SHIFT 0 -#define SCNTL3_800_CCF_MASK 0x07 -#define SCNTL3_800_CCF2 0x04 /* 0x00 50.01 to 66 */ -#define SCNTL3_800_CCF1 0x02 /* 0x01 16.67 to 25 */ -#define SCNTL3_800_CCF0 0x01 /* 0x02 25.01 - 37.5 - 0x03 37.51 - 50 - 0x04 50.01 - 66 */ - -/* - * SCSI destination ID rw - the appropriate bit is set for the selected - * target ID. This is written by the SCSI SCRIPTS processor. - * default = 0x00 - */ -#define SDID_REG_700 0x02 -#define SDID_REG_800 0x06 - -#define GP_REG_800 0x07 /* General purpose IO */ -#define GP_800_IO1 0x02 -#define GP_800_IO2 0x01 - -/* SCSI interrupt enable rw, default = 0x00 */ -#define SIEN_REG_700 0x03 -#define SIEN0_REG_800 0x40 -#define SIEN_MA 0x80 /* Phase mismatch (ini) or ATN (tgt) */ -#define SIEN_FC 0x40 /* Function complete */ -#define SIEN_700_STO 0x20 /* Selection or reselection timeout */ -#define SIEN_800_SEL 0x20 /* Selected */ -#define SIEN_700_SEL 0x10 /* Selected or reselected */ -#define SIEN_800_RESEL 0x10 /* Reselected */ -#define SIEN_SGE 0x08 /* SCSI gross error */ -#define SIEN_UDC 0x04 /* Unexpected disconnect */ -#define SIEN_RST 0x02 /* SCSI RST/ received */ -#define SIEN_PAR 0x01 /* Parity error */ - -/* - * SCSI chip ID rw - * NCR53c700 : - * When arbitrating, the highest bit is used, when reselection or selection - * occurs, the chip responds to all IDs for which a bit is set. - * default = 0x00 - * NCR53c810 : - * Uses bit mapping - */ -#define SCID_REG 0x04 -/* Bit 7 is reserved on 800 series chips */ -#define SCID_800_RRE 0x40 /* Enable response to reselection */ -#define SCID_800_SRE 0x20 /* Enable response to selection */ -/* Bits four and three are reserved on 800 series chips */ -#define SCID_800_ENC_MASK 0x07 /* Encoded SCSI ID */ - -/* SCSI transfer rw, default = 0x00 */ -#define SXFER_REG 0x05 -#define SXFER_DHP 0x80 /* Disable halt on parity */ - -#define SXFER_TP2 0x40 /* Transfer period msb */ -#define SXFER_TP1 0x20 -#define SXFER_TP0 0x10 /* lsb */ -#define SXFER_TP_MASK 0x70 -/* FIXME : SXFER_TP_SHIFT == 5 is right for '8xx chips */ -#define SXFER_TP_SHIFT 5 -#define SXFER_TP_4 0x00 /* Divisors */ -#define SXFER_TP_5 0x10<<1 -#define SXFER_TP_6 0x20<<1 -#define SXFER_TP_7 0x30<<1 -#define SXFER_TP_8 0x40<<1 -#define SXFER_TP_9 0x50<<1 -#define SXFER_TP_10 0x60<<1 -#define SXFER_TP_11 0x70<<1 - -#define SXFER_MO3 0x08 /* Max offset msb */ -#define SXFER_MO2 0x04 -#define SXFER_MO1 0x02 -#define SXFER_MO0 0x01 /* lsb */ -#define SXFER_MO_MASK 0x0f -#define SXFER_MO_SHIFT 0 - -/* - * SCSI output data latch rw - * The contents of this register are driven onto the SCSI bus when - * the Assert Data Bus bit of the SCNTL1 register is set and - * the CD, IO, and MSG bits of the SOCL register match the SCSI phase - */ -#define SODL_REG_700 0x06 -#define SODL_REG_800 0x54 - - -/* - * SCSI output control latch rw, default = 0 - * Note that when the chip is being manually programmed as an initiator, - * the MSG, CD, and IO bits must be set correctly for the phase the target - * is driving the bus in. Otherwise no data transfer will occur due to - * phase mismatch. - */ - -#define SOCL_REG 0x07 -#define SOCL_REQ 0x80 /* REQ */ -#define SOCL_ACK 0x40 /* ACK */ -#define SOCL_BSY 0x20 /* BSY */ -#define SOCL_SEL 0x10 /* SEL */ -#define SOCL_ATN 0x08 /* ATN */ -#define SOCL_MSG 0x04 /* MSG */ -#define SOCL_CD 0x02 /* C/D */ -#define SOCL_IO 0x01 /* I/O */ - -/* - * SCSI first byte received latch ro - * This register contains the first byte received during a block MOVE - * SCSI SCRIPTS instruction, including - * - * Initiator mode Target mode - * Message in Command - * Status Message out - * Data in Data out - * - * It also contains the selecting or reselecting device's ID and our - * ID. - * - * Note that this is the register the various IF conditionals can - * operate on. - */ -#define SFBR_REG 0x08 - -/* - * SCSI input data latch ro - * In initiator mode, data is latched into this register on the rising - * edge of REQ/. In target mode, data is latched on the rising edge of - * ACK/ - */ -#define SIDL_REG_700 0x09 -#define SIDL_REG_800 0x50 - -/* - * SCSI bus data lines ro - * This register reflects the instantaneous status of the SCSI data - * lines. Note that SCNTL0 must be set to disable parity checking, - * otherwise reading this register will latch new parity. - */ -#define SBDL_REG_700 0x0a -#define SBDL_REG_800 0x58 - -#define SSID_REG_800 0x0a -#define SSID_800_VAL 0x80 /* Exactly two bits asserted at sel */ -#define SSID_800_ENCID_MASK 0x07 /* Device which performed operation */ - - -/* - * SCSI bus control lines rw, - * instantaneous readout of control lines - */ -#define SBCL_REG 0x0b -#define SBCL_REQ 0x80 /* REQ ro */ -#define SBCL_ACK 0x40 /* ACK ro */ -#define SBCL_BSY 0x20 /* BSY ro */ -#define SBCL_SEL 0x10 /* SEL ro */ -#define SBCL_ATN 0x08 /* ATN ro */ -#define SBCL_MSG 0x04 /* MSG ro */ -#define SBCL_CD 0x02 /* C/D ro */ -#define SBCL_IO 0x01 /* I/O ro */ -#define SBCL_PHASE_CMDOUT SBCL_CD -#define SBCL_PHASE_DATAIN SBCL_IO -#define SBCL_PHASE_DATAOUT 0 -#define SBCL_PHASE_MSGIN (SBCL_CD|SBCL_IO|SBCL_MSG) -#define SBCL_PHASE_MSGOUT (SBCL_CD|SBCL_MSG) -#define SBCL_PHASE_STATIN (SBCL_CD|SBCL_IO) -#define SBCL_PHASE_MASK (SBCL_CD|SBCL_IO|SBCL_MSG) -/* - * Synchronous SCSI Clock Control bits - * 0 - set by DCNTL - * 1 - SCLK / 1.0 - * 2 - SCLK / 1.5 - * 3 - SCLK / 2.0 - */ -#define SBCL_SSCF1 0x02 /* wo, -66 only */ -#define SBCL_SSCF0 0x01 /* wo, -66 only */ -#define SBCL_SSCF_MASK 0x03 - -/* - * XXX note : when reading the DSTAT and STAT registers to clear interrupts, - * insure that 10 clocks elapse between the two - */ -/* DMA status ro */ -#define DSTAT_REG 0x0c -#define DSTAT_DFE 0x80 /* DMA FIFO empty */ -#define DSTAT_800_MDPE 0x40 /* Master Data Parity Error */ -#define DSTAT_800_BF 0x20 /* Bus Fault */ -#define DSTAT_ABRT 0x10 /* Aborted - set on error */ -#define DSTAT_SSI 0x08 /* SCRIPTS single step interrupt */ -#define DSTAT_SIR 0x04 /* SCRIPTS interrupt received - - set when INT instruction is - executed */ -#define DSTAT_WTD 0x02 /* Watchdog timeout detected */ -#define DSTAT_OPC 0x01 /* Illegal instruction */ -#define DSTAT_800_IID 0x01 /* Same thing, different name */ - - -/* NCR53c800 moves this stuff into SIST0 */ -#define SSTAT0_REG 0x0d /* SCSI status 0 ro */ -#define SIST0_REG_800 0x42 -#define SSTAT0_MA 0x80 /* ini : phase mismatch, - * tgt : ATN/ asserted - */ -#define SSTAT0_CMP 0x40 /* function complete */ -#define SSTAT0_700_STO 0x20 /* Selection or reselection timeout */ -#define SIST0_800_SEL 0x20 /* Selected */ -#define SSTAT0_700_SEL 0x10 /* Selected or reselected */ -#define SIST0_800_RSL 0x10 /* Reselected */ -#define SSTAT0_SGE 0x08 /* SCSI gross error */ -#define SSTAT0_UDC 0x04 /* Unexpected disconnect */ -#define SSTAT0_RST 0x02 /* SCSI RST/ received */ -#define SSTAT0_PAR 0x01 /* Parity error */ - -/* And uses SSTAT0 for what was SSTAT1 */ - -#define SSTAT1_REG 0x0e /* SCSI status 1 ro */ -#define SSTAT1_ILF 0x80 /* SIDL full */ -#define SSTAT1_ORF 0x40 /* SODR full */ -#define SSTAT1_OLF 0x20 /* SODL full */ -#define SSTAT1_AIP 0x10 /* Arbitration in progress */ -#define SSTAT1_LOA 0x08 /* Lost arbitration */ -#define SSTAT1_WOA 0x04 /* Won arbitration */ -#define SSTAT1_RST 0x02 /* Instant readout of RST/ */ -#define SSTAT1_SDP 0x01 /* Instant readout of SDP/ */ - -#define SSTAT2_REG 0x0f /* SCSI status 2 ro */ -#define SSTAT2_FF3 0x80 /* number of bytes in synchronous */ -#define SSTAT2_FF2 0x40 /* data FIFO */ -#define SSTAT2_FF1 0x20 -#define SSTAT2_FF0 0x10 -#define SSTAT2_FF_MASK 0xf0 -#define SSTAT2_FF_SHIFT 4 - -/* - * Latched signals, latched on the leading edge of REQ/ for initiators, - * ACK/ for targets. - */ -#define SSTAT2_SDP 0x08 /* SDP */ -#define SSTAT2_MSG 0x04 /* MSG */ -#define SSTAT2_CD 0x02 /* C/D */ -#define SSTAT2_IO 0x01 /* I/O */ -#define SSTAT2_PHASE_CMDOUT SSTAT2_CD -#define SSTAT2_PHASE_DATAIN SSTAT2_IO -#define SSTAT2_PHASE_DATAOUT 0 -#define SSTAT2_PHASE_MSGIN (SSTAT2_CD|SSTAT2_IO|SSTAT2_MSG) -#define SSTAT2_PHASE_MSGOUT (SSTAT2_CD|SSTAT2_MSG) -#define SSTAT2_PHASE_STATIN (SSTAT2_CD|SSTAT2_IO) -#define SSTAT2_PHASE_MASK (SSTAT2_CD|SSTAT2_IO|SSTAT2_MSG) - - -/* NCR53c700-66 only */ -#define SCRATCHA_REG_00 0x10 /* through 0x13 Scratch A rw */ -/* NCR53c710 and higher */ -#define DSA_REG 0x10 /* DATA structure address */ - -#define CTEST0_REG_700 0x14 /* Chip test 0 ro */ -#define CTEST0_REG_800 0x18 /* Chip test 0 rw, general purpose */ -/* 0x80 - 0x04 are reserved */ -#define CTEST0_700_RTRG 0x02 /* Real target mode */ -#define CTEST0_700_DDIR 0x01 /* Data direction, 1 = - * SCSI bus to host, 0 = - * host to SCSI. - */ - -#define CTEST1_REG_700 0x15 /* Chip test 1 ro */ -#define CTEST1_REG_800 0x19 /* Chip test 1 ro */ -#define CTEST1_FMT3 0x80 /* Identify which byte lanes are empty */ -#define CTEST1_FMT2 0x40 /* in the DMA FIFO */ -#define CTEST1_FMT1 0x20 -#define CTEST1_FMT0 0x10 - -#define CTEST1_FFL3 0x08 /* Identify which bytes lanes are full */ -#define CTEST1_FFL2 0x04 /* in the DMA FIFO */ -#define CTEST1_FFL1 0x02 -#define CTEST1_FFL0 0x01 - -#define CTEST2_REG_700 0x16 /* Chip test 2 ro */ -#define CTEST2_REG_800 0x1a /* Chip test 2 ro */ - -#define CTEST2_800_DDIR 0x80 /* 1 = SCSI->host */ -#define CTEST2_800_SIGP 0x40 /* A copy of SIGP in ISTAT. - Reading this register clears */ -#define CTEST2_800_CIO 0x20 /* Configured as IO */. -#define CTEST2_800_CM 0x10 /* Configured as memory */ - -/* 0x80 - 0x40 are reserved on 700 series chips */ -#define CTEST2_700_SOFF 0x20 /* SCSI Offset Compare, - * As an initiator, this bit is - * one when the synchronous offset - * is zero, as a target this bit - * is one when the synchronous - * offset is at the maximum - * defined in SXFER - */ -#define CTEST2_700_SFP 0x10 /* SCSI FIFO parity bit, - * reading CTEST3 unloads a byte - * from the FIFO and sets this - */ -#define CTEST2_700_DFP 0x08 /* DMA FIFO parity bit, - * reading CTEST6 unloads a byte - * from the FIFO and sets this - */ -#define CTEST2_TEOP 0x04 /* SCSI true end of process, - * indicates a totally finished - * transfer - */ -#define CTEST2_DREQ 0x02 /* Data request signal */ -/* 0x01 is reserved on 700 series chips */ -#define CTEST2_800_DACK 0x01 - -/* - * Chip test 3 ro - * Unloads the bottom byte of the eight deep SCSI synchronous FIFO, - * check SSTAT2 FIFO full bits to determine size. Note that a GROSS - * error results if a read is attempted on this register. Also note - * that 16 and 32 bit reads of this register will cause corruption. - */ -#define CTEST3_REG_700 0x17 -/* Chip test 3 rw */ -#define CTEST3_REG_800 0x1b -#define CTEST3_800_V3 0x80 /* Chip revision */ -#define CTEST3_800_V2 0x40 -#define CTEST3_800_V1 0x20 -#define CTEST3_800_V0 0x10 -#define CTEST3_800_FLF 0x08 /* Flush DMA FIFO */ -#define CTEST3_800_CLF 0x04 /* Clear DMA FIFO */ -#define CTEST3_800_FM 0x02 /* Fetch mode pin */ -/* bit 0 is reserved on 800 series chips */ - -#define CTEST4_REG_700 0x18 /* Chip test 4 rw */ -#define CTEST4_REG_800 0x21 /* Chip test 4 rw */ -/* 0x80 is reserved on 700 series chips */ -#define CTEST4_800_BDIS 0x80 /* Burst mode disable */ -#define CTEST4_ZMOD 0x40 /* High impedance mode */ -#define CTEST4_SZM 0x20 /* SCSI bus high impedance */ -#define CTEST4_700_SLBE 0x10 /* SCSI loopback enabled */ -#define CTEST4_800_SRTM 0x10 /* Shadow Register Test Mode */ -#define CTEST4_700_SFWR 0x08 /* SCSI FIFO write enable, - * redirects writes from SODL - * to the SCSI FIFO. - */ -#define CTEST4_800_MPEE 0x08 /* Enable parity checking - during master cycles on PCI - bus */ - -/* - * These bits send the contents of the CTEST6 register to the appropriate - * byte lane of the 32 bit DMA FIFO. Normal operation is zero, otherwise - * the high bit means the low two bits select the byte lane. - */ -#define CTEST4_FBL2 0x04 -#define CTEST4_FBL1 0x02 -#define CTEST4_FBL0 0x01 -#define CTEST4_FBL_MASK 0x07 -#define CTEST4_FBL_0 0x04 /* Select DMA FIFO byte lane 0 */ -#define CTEST4_FBL_1 0x05 /* Select DMA FIFO byte lane 1 */ -#define CTEST4_FBL_2 0x06 /* Select DMA FIFO byte lane 2 */ -#define CTEST4_FBL_3 0x07 /* Select DMA FIFO byte lane 3 */ -#define CTEST4_800_SAVE (CTEST4_800_BDIS) - - -#define CTEST5_REG_700 0x19 /* Chip test 5 rw */ -#define CTEST5_REG_800 0x22 /* Chip test 5 rw */ -/* - * Clock Address Incrementor. When set, it increments the - * DNAD register to the next bus size boundary. It automatically - * resets itself when the operation is complete. - */ -#define CTEST5_ADCK 0x80 -/* - * Clock Byte Counter. When set, it decrements the DBC register to - * the next bus size boundary. - */ -#define CTEST5_BBCK 0x40 -/* - * Reset SCSI Offset. Setting this bit to 1 clears the current offset - * pointer in the SCSI synchronous offset counter (SSTAT). This bit - * is set to 1 if a SCSI Gross Error Condition occurs. The offset should - * be cleared when a synchronous transfer fails. When written, it is - * automatically cleared after the SCSI synchronous offset counter is - * reset. - */ -/* Bit 5 is reserved on 800 series chips */ -#define CTEST5_700_ROFF 0x20 -/* - * Master Control for Set or Reset pulses. When 1, causes the low - * four bits of register to set when set, 0 causes the low bits to - * clear when set. - */ -#define CTEST5_MASR 0x10 -#define CTEST5_DDIR 0x08 /* DMA direction */ -/* - * Bits 2-0 are reserved on 800 series chips - */ -#define CTEST5_700_EOP 0x04 /* End of process */ -#define CTEST5_700_DREQ 0x02 /* Data request */ -#define CTEST5_700_DACK 0x01 /* Data acknowledge */ - -/* - * Chip test 6 rw - writing to this register writes to the byte - * lane in the DMA FIFO as determined by the FBL bits in the CTEST4 - * register. - */ -#define CTEST6_REG_700 0x1a -#define CTEST6_REG_800 0x23 - -#define CTEST7_REG 0x1b /* Chip test 7 rw */ -/* 0x80 - 0x40 are reserved on NCR53c700 and NCR53c700-66 chips */ -#define CTEST7_10_CDIS 0x80 /* Cache burst disable */ -#define CTEST7_10_SC1 0x40 /* Snoop control bits */ -#define CTEST7_10_SC0 0x20 -#define CTEST7_10_SC_MASK 0x60 -/* 0x20 is reserved on the NCR53c700 */ -#define CTEST7_0060_FM 0x20 /* Fetch mode */ -#define CTEST7_STD 0x10 /* Selection timeout disable */ -#define CTEST7_DFP 0x08 /* DMA FIFO parity bit for CTEST6 */ -#define CTEST7_EVP 0x04 /* 1 = host bus even parity, 0 = odd */ -#define CTEST7_10_TT1 0x02 /* Transfer type */ -#define CTEST7_00_DC 0x02 /* Set to drive DC low during instruction - fetch */ -#define CTEST7_DIFF 0x01 /* Differential mode */ - -#define CTEST7_SAVE ( CTEST7_EVP | CTEST7_DIFF ) - - -#define TEMP_REG 0x1c /* through 0x1f Temporary stack rw */ - -#define DFIFO_REG 0x20 /* DMA FIFO rw */ -/* - * 0x80 is reserved on the NCR53c710, the CLF and FLF bits have been - * moved into the CTEST8 register. - */ -#define DFIFO_00_FLF 0x80 /* Flush DMA FIFO to memory */ -#define DFIFO_00_CLF 0x40 /* Clear DMA and SCSI FIFOs */ -#define DFIFO_BO6 0x40 -#define DFIFO_BO5 0x20 -#define DFIFO_BO4 0x10 -#define DFIFO_BO3 0x08 -#define DFIFO_BO2 0x04 -#define DFIFO_BO1 0x02 -#define DFIFO_BO0 0x01 -#define DFIFO_10_BO_MASK 0x7f /* 7 bit counter */ -#define DFIFO_00_BO_MASK 0x3f /* 6 bit counter */ - -/* - * Interrupt status rw - * Note that this is the only register which can be read while SCSI - * SCRIPTS are being executed. - */ -#define ISTAT_REG_700 0x21 -#define ISTAT_REG_800 0x14 -#define ISTAT_ABRT 0x80 /* Software abort, write - *1 to abort, wait for interrupt. */ -/* 0x40 and 0x20 are reserved on NCR53c700 and NCR53c700-66 chips */ -#define ISTAT_10_SRST 0x40 /* software reset */ -#define ISTAT_10_SIGP 0x20 /* signal script */ -/* 0x10 is reserved on NCR53c700 series chips */ -#define ISTAT_800_SEM 0x10 /* semaphore */ -#define ISTAT_CON 0x08 /* 1 when connected */ -#define ISTAT_800_INTF 0x04 /* Interrupt on the fly */ -#define ISTAT_700_PRE 0x04 /* Pointer register empty. - * Set to 1 when DSPS and DSP - * registers are empty in pipeline - * mode, always set otherwise. - */ -#define ISTAT_SIP 0x02 /* SCSI interrupt pending from - * SCSI portion of SIOP see - * SSTAT0 - */ -#define ISTAT_DIP 0x01 /* DMA interrupt pending - * see DSTAT - */ - -/* NCR53c700-66 and NCR53c710 only */ -#define CTEST8_REG 0x22 /* Chip test 8 rw */ -#define CTEST8_0066_EAS 0x80 /* Enable alternate SCSI clock, - * ie read from SCLK/ rather than CLK/ - */ -#define CTEST8_0066_EFM 0x40 /* Enable fetch and master outputs */ -#define CTEST8_0066_GRP 0x20 /* Generate Receive Parity for - * pass through. This insures that - * bad parity won't reach the host - * bus. - */ -#define CTEST8_0066_TE 0x10 /* TolerANT enable. Enable - * active negation, should only - * be used for slow SCSI - * non-differential. - */ -#define CTEST8_0066_HSC 0x08 /* Halt SCSI clock */ -#define CTEST8_0066_SRA 0x04 /* Shorten REQ/ACK filtering, - * must be set for fast SCSI-II - * speeds. - */ -#define CTEST8_0066_DAS 0x02 /* Disable automatic target/initiator - * switching. - */ -#define CTEST8_0066_LDE 0x01 /* Last disconnect enable. - * The status of pending - * disconnect is maintained by - * the core, eliminating - * the possibility of missing a - * selection or reselection - * while waiting to fetch a - * WAIT DISCONNECT opcode. - */ - -#define CTEST8_10_V3 0x80 /* Chip revision */ -#define CTEST8_10_V2 0x40 -#define CTEST8_10_V1 0x20 -#define CTEST8_10_V0 0x10 -#define CTEST8_10_V_MASK 0xf0 -#define CTEST8_10_FLF 0x08 /* Flush FIFOs */ -#define CTEST8_10_CLF 0x04 /* Clear FIFOs */ -#define CTEST8_10_FM 0x02 /* Fetch pin mode */ -#define CTEST8_10_SM 0x01 /* Snoop pin mode */ - - -/* - * The CTEST9 register may be used to differentiate between a - * NCR53c700 and a NCR53c710. - * - * Write 0xff to this register. - * Read it. - * If the contents are 0xff, it is a NCR53c700 - * If the contents are 0x00, it is a NCR53c700-66 first revision - * If the contents are some other value, it is some other NCR53c700-66 - */ -#define CTEST9_REG_00 0x23 /* Chip test 9 ro */ -#define LCRC_REG_10 0x23 - -/* - * 0x24 through 0x27 are the DMA byte counter register. Instructions - * write their high 8 bits into the DCMD register, the low 24 bits into - * the DBC register. - * - * Function is dependent on the command type being executed. - */ - - -#define DBC_REG 0x24 -/* - * For Block Move Instructions, DBC is a 24 bit quantity representing - * the number of bytes to transfer. - * For Transfer Control Instructions, DBC is bit fielded as follows : - */ -/* Bits 20 - 23 should be clear */ -#define DBC_TCI_TRUE (1 << 19) /* Jump when true */ -#define DBC_TCI_COMPARE_DATA (1 << 18) /* Compare data */ -#define DBC_TCI_COMPARE_PHASE (1 << 17) /* Compare phase with DCMD field */ -#define DBC_TCI_WAIT_FOR_VALID (1 << 16) /* Wait for REQ */ -/* Bits 8 - 15 are reserved on some implementations ? */ -#define DBC_TCI_MASK_MASK 0xff00 /* Mask for data compare */ -#define DBC_TCI_MASK_SHIFT 8 -#define DBC_TCI_DATA_MASK 0xff /* Data to be compared */ -#define DBC_TCI_DATA_SHIFT 0 - -#define DBC_RWRI_IMMEDIATE_MASK 0xff00 /* Immediate data */ -#define DBC_RWRI_IMMEDIATE_SHIFT 8 /* Amount to shift */ -#define DBC_RWRI_ADDRESS_MASK 0x3f0000 /* Register address */ -#define DBC_RWRI_ADDRESS_SHIFT 16 - - -/* - * DMA command r/w - */ -#define DCMD_REG 0x27 -#define DCMD_TYPE_MASK 0xc0 /* Masks off type */ -#define DCMD_TYPE_BMI 0x00 /* Indicates a Block Move instruction */ -#define DCMD_BMI_IO 0x01 /* I/O, CD, and MSG bits selecting */ -#define DCMD_BMI_CD 0x02 /* the phase for the block MOVE */ -#define DCMD_BMI_MSG 0x04 /* instruction */ - -#define DCMD_BMI_OP_MASK 0x18 /* mask for opcode */ -#define DCMD_BMI_OP_MOVE_T 0x00 /* MOVE */ -#define DCMD_BMI_OP_MOVE_I 0x08 /* MOVE Initiator */ - -#define DCMD_BMI_INDIRECT 0x20 /* Indirect addressing */ - -#define DCMD_TYPE_TCI 0x80 /* Indicates a Transfer Control - instruction */ -#define DCMD_TCI_IO 0x01 /* I/O, CD, and MSG bits selecting */ -#define DCMD_TCI_CD 0x02 /* the phase for the block MOVE */ -#define DCMD_TCI_MSG 0x04 /* instruction */ -#define DCMD_TCI_OP_MASK 0x38 /* mask for opcode */ -#define DCMD_TCI_OP_JUMP 0x00 /* JUMP */ -#define DCMD_TCI_OP_CALL 0x08 /* CALL */ -#define DCMD_TCI_OP_RETURN 0x10 /* RETURN */ -#define DCMD_TCI_OP_INT 0x18 /* INT */ - -#define DCMD_TYPE_RWRI 0x40 /* Indicates I/O or register Read/Write - instruction */ -#define DCMD_RWRI_OPC_MASK 0x38 /* Opcode mask */ -#define DCMD_RWRI_OPC_WRITE 0x28 /* Write SFBR to register */ -#define DCMD_RWRI_OPC_READ 0x30 /* Read register to SFBR */ -#define DCMD_RWRI_OPC_MODIFY 0x38 /* Modify in place */ - -#define DCMD_RWRI_OP_MASK 0x07 -#define DCMD_RWRI_OP_MOVE 0x00 -#define DCMD_RWRI_OP_SHL 0x01 -#define DCMD_RWRI_OP_OR 0x02 -#define DCMD_RWRI_OP_XOR 0x03 -#define DCMD_RWRI_OP_AND 0x04 -#define DCMD_RWRI_OP_SHR 0x05 -#define DCMD_RWRI_OP_ADD 0x06 -#define DCMD_RWRI_OP_ADDC 0x07 - -#define DCMD_TYPE_MMI 0xc0 /* Indicates a Memory Move instruction - (three words) */ - - -#define DNAD_REG 0x28 /* through 0x2b DMA next address for - data */ -#define DSP_REG 0x2c /* through 0x2f DMA SCRIPTS pointer rw */ -#define DSPS_REG 0x30 /* through 0x33 DMA SCRIPTS pointer - save rw */ -#define DMODE_REG_00 0x34 /* DMA mode rw */ -#define DMODE_00_BL1 0x80 /* Burst length bits */ -#define DMODE_00_BL0 0x40 -#define DMODE_BL_MASK 0xc0 -/* Burst lengths (800) */ -#define DMODE_BL_2 0x00 /* 2 transfer */ -#define DMODE_BL_4 0x40 /* 4 transfers */ -#define DMODE_BL_8 0x80 /* 8 transfers */ -#define DMODE_BL_16 0xc0 /* 16 transfers */ - -#define DMODE_10_BL_1 0x00 /* 1 transfer */ -#define DMODE_10_BL_2 0x40 /* 2 transfers */ -#define DMODE_10_BL_4 0x80 /* 4 transfers */ -#define DMODE_10_BL_8 0xc0 /* 8 transfers */ -#define DMODE_10_FC2 0x20 /* Driven to FC2 pin */ -#define DMODE_10_FC1 0x10 /* Driven to FC1 pin */ -#define DMODE_710_PD 0x08 /* Program/data on FC0 pin */ -#define DMODE_710_UO 0x02 /* User prog. output */ - -#define DMODE_700_BW16 0x20 /* Host buswidth = 16 */ -#define DMODE_700_286 0x10 /* 286 mode */ -#define DMODE_700_IOM 0x08 /* Transfer to IO port */ -#define DMODE_700_FAM 0x04 /* Fixed address mode */ -#define DMODE_700_PIPE 0x02 /* Pipeline mode disables - * automatic fetch / exec - */ -#define DMODE_MAN 0x01 /* Manual start mode, - * requires a 1 to be written - * to the start DMA bit in the DCNTL - * register to run scripts - */ - -#define DMODE_700_SAVE ( DMODE_00_BL_MASK | DMODE_00_BW16 | DMODE_00_286 ) - -/* NCR53c800 series only */ -#define SCRATCHA_REG_800 0x34 /* through 0x37 Scratch A rw */ -/* NCR53c710 only */ -#define SCRATCHB_REG_10 0x34 /* through 0x37 scratch B rw */ - -#define DMODE_REG_10 0x38 /* DMA mode rw, NCR53c710 and newer */ -#define DMODE_800_SIOM 0x20 /* Source IO = 1 */ -#define DMODE_800_DIOM 0x10 /* Destination IO = 1 */ -#define DMODE_800_ERL 0x08 /* Enable Read Line */ - -/* 35-38 are reserved on 700 and 700-66 series chips */ -#define DIEN_REG 0x39 /* DMA interrupt enable rw */ -/* 0x80, 0x40, and 0x20 are reserved on 700-series chips */ -#define DIEN_800_MDPE 0x40 /* Master data parity error */ -#define DIEN_800_BF 0x20 /* BUS fault */ -#define DIEN_700_BF 0x20 /* BUS fault */ -#define DIEN_ABRT 0x10 /* Enable aborted interrupt */ -#define DIEN_SSI 0x08 /* Enable single step interrupt */ -#define DIEN_SIR 0x04 /* Enable SCRIPTS INT command - * interrupt - */ -/* 0x02 is reserved on 800 series chips */ -#define DIEN_700_WTD 0x02 /* Enable watchdog timeout interrupt */ -#define DIEN_700_OPC 0x01 /* Enable illegal instruction - * interrupt - */ -#define DIEN_800_IID 0x01 /* Same meaning, different name */ - -/* - * DMA watchdog timer rw - * set in 16 CLK input periods. - */ -#define DWT_REG 0x3a - -/* DMA control rw */ -#define DCNTL_REG 0x3b -#define DCNTL_700_CF1 0x80 /* Clock divisor bits */ -#define DCNTL_700_CF0 0x40 -#define DCNTL_700_CF_MASK 0xc0 -/* Clock divisors Divisor SCLK range (MHZ) */ -#define DCNTL_700_CF_2 0x00 /* 2.0 37.51-50.00 */ -#define DCNTL_700_CF_1_5 0x40 /* 1.5 25.01-37.50 */ -#define DCNTL_700_CF_1 0x80 /* 1.0 16.67-25.00 */ -#define DCNTL_700_CF_3 0xc0 /* 3.0 50.01-66.67 (53c700-66) */ - -#define DCNTL_700_S16 0x20 /* Load scripts 16 bits at a time */ -#define DCNTL_SSM 0x10 /* Single step mode */ -#define DCNTL_700_LLM 0x08 /* Low level mode, can only be set - * after selection */ -#define DCNTL_800_IRQM 0x08 /* Totem pole IRQ pin */ -#define DCNTL_STD 0x04 /* Start DMA / SCRIPTS */ -/* 0x02 is reserved */ -#define DCNTL_00_RST 0x01 /* Software reset, resets everything - * but 286 mode bit in DMODE. On the - * NCR53c710, this bit moved to CTEST8 - */ -#define DCNTL_10_COM 0x01 /* 700 software compatibility mode */ -#define DCNTL_10_EA 0x20 /* Enable Ack - needed for MVME16x */ - -#define DCNTL_700_SAVE ( DCNTL_CF_MASK | DCNTL_S16) - - -/* NCR53c700-66 only */ -#define SCRATCHB_REG_00 0x3c /* through 0x3f scratch b rw */ -#define SCRATCHB_REG_800 0x5c /* through 0x5f scratch b rw */ -/* NCR53c710 only */ -#define ADDER_REG_10 0x3c /* Adder, NCR53c710 only */ - -#define SIEN1_REG_800 0x41 -#define SIEN1_800_STO 0x04 /* selection/reselection timeout */ -#define SIEN1_800_GEN 0x02 /* general purpose timer */ -#define SIEN1_800_HTH 0x01 /* handshake to handshake */ - -#define SIST1_REG_800 0x43 -#define SIST1_800_STO 0x04 /* selection/reselection timeout */ -#define SIST1_800_GEN 0x02 /* general purpose timer */ -#define SIST1_800_HTH 0x01 /* handshake to handshake */ - -#define SLPAR_REG_800 0x44 /* Parity */ - -#define MACNTL_REG_800 0x46 /* Memory access control */ -#define MACNTL_800_TYP3 0x80 -#define MACNTL_800_TYP2 0x40 -#define MACNTL_800_TYP1 0x20 -#define MACNTL_800_TYP0 0x10 -#define MACNTL_800_DWR 0x08 -#define MACNTL_800_DRD 0x04 -#define MACNTL_800_PSCPT 0x02 -#define MACNTL_800_SCPTS 0x01 - -#define GPCNTL_REG_800 0x47 /* General Purpose Pin Control */ - -/* Timeouts are expressed such that 0=off, 1=100us, doubling after that */ -#define STIME0_REG_800 0x48 /* SCSI Timer Register 0 */ -#define STIME0_800_HTH_MASK 0xf0 /* Handshake to Handshake timeout */ -#define STIME0_800_HTH_SHIFT 4 -#define STIME0_800_SEL_MASK 0x0f /* Selection timeout */ -#define STIME0_800_SEL_SHIFT 0 - -#define STIME1_REG_800 0x49 -#define STIME1_800_GEN_MASK 0x0f /* General purpose timer */ - -#define RESPID_REG_800 0x4a /* Response ID, bit fielded. 8 - bits on narrow chips, 16 on WIDE */ - -#define STEST0_REG_800 0x4c -#define STEST0_800_SLT 0x08 /* Selection response logic test */ -#define STEST0_800_ART 0x04 /* Arbitration priority encoder test */ -#define STEST0_800_SOZ 0x02 /* Synchronous offset zero */ -#define STEST0_800_SOM 0x01 /* Synchronous offset maximum */ - -#define STEST1_REG_800 0x4d -#define STEST1_800_SCLK 0x80 /* Disable SCSI clock */ - -#define STEST2_REG_800 0x4e -#define STEST2_800_SCE 0x80 /* Enable SOCL/SODL */ -#define STEST2_800_ROF 0x40 /* Reset SCSI sync offset */ -#define STEST2_800_SLB 0x10 /* Enable SCSI loopback mode */ -#define STEST2_800_SZM 0x08 /* SCSI high impedance mode */ -#define STEST2_800_EXT 0x02 /* Extend REQ/ACK filter 30 to 60ns */ -#define STEST2_800_LOW 0x01 /* SCSI low level mode */ - -#define STEST3_REG_800 0x4f -#define STEST3_800_TE 0x80 /* Enable active negation */ -#define STEST3_800_STR 0x40 /* SCSI FIFO test read */ -#define STEST3_800_HSC 0x20 /* Halt SCSI clock */ -#define STEST3_800_DSI 0x10 /* Disable single initiator response */ -#define STEST3_800_TTM 0x04 /* Time test mode */ -#define STEST3_800_CSF 0x02 /* Clear SCSI FIFO */ -#define STEST3_800_STW 0x01 /* SCSI FIFO test write */ - -#define OPTION_PARITY 0x1 /* Enable parity checking */ -#define OPTION_TAGGED_QUEUE 0x2 /* Enable SCSI-II tagged queuing */ -#define OPTION_700 0x8 /* Always run NCR53c700 scripts */ -#define OPTION_INTFLY 0x10 /* Use INTFLY interrupts */ -#define OPTION_DEBUG_INTR 0x20 /* Debug interrupts */ -#define OPTION_DEBUG_INIT_ONLY 0x40 /* Run initialization code and - simple test code, return - DID_NO_CONNECT if any SCSI - commands are attempted. */ -#define OPTION_DEBUG_READ_ONLY 0x80 /* Return DID_ERROR if any - SCSI write is attempted */ -#define OPTION_DEBUG_TRACE 0x100 /* Animated trace mode, print - each address and instruction - executed to debug buffer. */ -#define OPTION_DEBUG_SINGLE 0x200 /* stop after executing one - instruction */ -#define OPTION_SYNCHRONOUS 0x400 /* Enable sync SCSI. */ -#define OPTION_MEMORY_MAPPED 0x800 /* NCR registers have valid - memory mapping */ -#define OPTION_IO_MAPPED 0x1000 /* NCR registers have valid - I/O mapping */ -#define OPTION_DEBUG_PROBE_ONLY 0x2000 /* Probe only, don't even init */ -#define OPTION_DEBUG_TESTS_ONLY 0x4000 /* Probe, init, run selected tests */ -#define OPTION_DEBUG_TEST0 0x08000 /* Run test 0 */ -#define OPTION_DEBUG_TEST1 0x10000 /* Run test 1 */ -#define OPTION_DEBUG_TEST2 0x20000 /* Run test 2 */ -#define OPTION_DEBUG_DUMP 0x40000 /* Dump commands */ -#define OPTION_DEBUG_TARGET_LIMIT 0x80000 /* Only talk to target+luns specified */ -#define OPTION_DEBUG_NCOMMANDS_LIMIT 0x100000 /* Limit the number of commands */ -#define OPTION_DEBUG_SCRIPT 0x200000 /* Print when checkpoints are passed */ -#define OPTION_DEBUG_FIXUP 0x400000 /* print fixup values */ -#define OPTION_DEBUG_DSA 0x800000 -#define OPTION_DEBUG_CORRUPTION 0x1000000 /* Detect script corruption */ -#define OPTION_DEBUG_SDTR 0x2000000 /* Debug SDTR problem */ -#define OPTION_DEBUG_MISMATCH 0x4000000 /* Debug phase mismatches */ -#define OPTION_DISCONNECT 0x8000000 /* Allow disconnect */ -#define OPTION_DEBUG_DISCONNECT 0x10000000 -#define OPTION_ALWAYS_SYNCHRONOUS 0x20000000 /* Negotiate sync. transfers - on power up */ -#define OPTION_DEBUG_QUEUES 0x80000000 -#define OPTION_DEBUG_ALLOCATION 0x100000000LL -#define OPTION_DEBUG_SYNCHRONOUS 0x200000000LL /* Sanity check SXFER and - SCNTL3 registers */ -#define OPTION_NO_ASYNC 0x400000000LL /* Don't automagically send - SDTR for async transfers when - we haven't been told to do - a synchronous transfer. */ -#define OPTION_NO_PRINT_RACE 0x800000000LL /* Don't print message when - the reselect/WAIT DISCONNECT - race condition hits */ -#if !defined(PERM_OPTIONS) -#define PERM_OPTIONS 0 -#endif - -/* - * Some data which is accessed by the NCR chip must be 4-byte aligned. - * For some hosts the default is less than that (eg. 68K uses 2-byte). - * Alignment has only been forced where it is important; also if one - * 32 bit structure field is aligned then it is assumed that following - * 32 bit fields are also aligned. Take care when adding fields - * which are other than 32 bit. - */ - -struct NCR53c7x0_synchronous { - u32 select_indirect /* Value used for indirect selection */ - __attribute__ ((aligned (4))); - u32 sscf_710; /* Used to set SSCF bits for 710 */ - u32 script[8]; /* Size ?? Script used when target is - reselected */ - unsigned char synchronous_want[5]; /* Per target desired SDTR */ -/* - * Set_synchronous programs these, select_indirect and current settings after - * int_debug_should show a match. - */ - unsigned char sxfer_sanity, scntl3_sanity; -}; - -#define CMD_FLAG_SDTR 1 /* Initiating synchronous - transfer negotiation */ -#define CMD_FLAG_WDTR 2 /* Initiating wide transfer - negotiation */ -#define CMD_FLAG_DID_SDTR 4 /* did SDTR */ -#define CMD_FLAG_DID_WDTR 8 /* did WDTR */ - -struct NCR53c7x0_table_indirect { - u32 count; - void *address; -}; - -enum ncr_event { - EVENT_NONE = 0, -/* - * Order is IMPORTANT, since these must correspond to the event interrupts - * in 53c7,8xx.scr - */ - - EVENT_ISSUE_QUEUE = 0x5000000, /* 0 Command was added to issue queue */ - EVENT_START_QUEUE, /* 1 Command moved to start queue */ - EVENT_SELECT, /* 2 Command completed selection */ - EVENT_DISCONNECT, /* 3 Command disconnected */ - EVENT_RESELECT, /* 4 Command reselected */ - EVENT_COMPLETE, /* 5 Command completed */ - EVENT_IDLE, /* 6 */ - EVENT_SELECT_FAILED, /* 7 */ - EVENT_BEFORE_SELECT, /* 8 */ - EVENT_RESELECT_FAILED /* 9 */ -}; - -struct NCR53c7x0_event { - enum ncr_event event; /* What type of event */ - unsigned char target; - unsigned char lun; - struct timeval time; - u32 *dsa; /* What's in the DSA register now (virt) */ -/* - * A few things from that SCSI pid so we know what happened after - * the Scsi_Cmnd structure in question may have disappeared. - */ - unsigned long pid; /* The SCSI PID which caused this - event */ - unsigned char cmnd[12]; -}; - -/* - * Things in the NCR53c7x0_cmd structure are split into two parts : - * - * 1. A fixed portion, for things which are not accessed directly by static NCR - * code (ie, are referenced only by the Linux side of the driver, - * or only by dynamically generated code). - * - * 2. The DSA portion, for things which are accessed directly by static NCR - * code. - * - * This is a little ugly, but it - * 1. Avoids conflicts between the NCR code's picture of the structure, and - * Linux code's idea of what it looks like. - * - * 2. Minimizes the pain in the Linux side of the code needed - * to calculate real dsa locations for things, etc. - * - */ - -struct NCR53c7x0_cmd { - void *real; /* Real, unaligned address for - free function */ - void (* free)(void *, int); /* Command to deallocate; NULL - for structures allocated with - scsi_register, etc. */ - Scsi_Cmnd *cmd; /* Associated Scsi_Cmnd - structure, Scsi_Cmnd points - at NCR53c7x0_cmd using - host_scribble structure */ - - int size; /* scsi_malloc'd size of this - structure */ - - int flags; /* CMD_* flags */ - - unsigned char cmnd[12]; /* CDB, copied from Scsi_Cmnd */ - int result; /* Copy to Scsi_Cmnd when done */ - - struct { /* Private non-cached bounce buffer */ - unsigned char buf[256]; - u32 addr; - u32 len; - } bounce; - -/* - * SDTR and WIDE messages are an either/or affair - * in this message, since we will go into message out and send - * _the whole mess_ without dropping out of message out to - * let the target go into message in after sending the first - * message. - */ - - unsigned char select[11]; /* Select message, includes - IDENTIFY - (optional) QUEUE TAG - (optional) SDTR or WDTR - */ - - - volatile struct NCR53c7x0_cmd *next; /* Linux maintained lists (free, - running, eventually finished */ - - - u32 *data_transfer_start; /* Start of data transfer routines */ - u32 *data_transfer_end; /* Address after end of data transfer o - routines */ -/* - * The following three fields were moved from the DSA proper to here - * since only dynamically generated NCR code refers to them, meaning - * we don't need dsa_* absolutes, and it is simpler to let the - * host code refer to them directly. - */ - -/* - * HARD CODED : residual and saved_residual need to agree with the sizes - * used in NCR53c7,8xx.scr. - * - * FIXME: we want to consider the case where we have odd-length - * scatter/gather buffers and a WIDE transfer, in which case - * we'll need to use the CHAIN MOVE instruction. Ick. - */ - u32 residual[6] __attribute__ ((aligned (4))); - /* Residual data transfer which - allows pointer code to work - right. - - [0-1] : Conditional call to - appropriate other transfer - routine. - [2-3] : Residual block transfer - instruction. - [4-5] : Jump to instruction - after splice. - */ - u32 saved_residual[6]; /* Copy of old residual, so we - can get another partial - transfer and still recover - */ - - u32 saved_data_pointer; /* Saved data pointer */ - - u32 dsa_next_addr; /* _Address_ of dsa_next field - in this dsa for RISCy - style constant. */ - - u32 dsa_addr; /* Address of dsa; RISCy style - constant */ - - u32 dsa[0]; /* Variable length (depending - on host type, number of scatter / - gather buffers, etc). */ -}; - -struct NCR53c7x0_break { - u32 *address, old_instruction[2]; - struct NCR53c7x0_break *next; - unsigned char old_size; /* Size of old instruction */ -}; - -/* Indicates that the NCR is not executing code */ -#define STATE_HALTED 0 -/* - * Indicates that the NCR is executing the wait for select / reselect - * script. Only used when running NCR53c700 compatible scripts, only - * state during which an ABORT is _not_ considered an error condition. - */ -#define STATE_WAITING 1 -/* Indicates that the NCR is executing other code. */ -#define STATE_RUNNING 2 -/* - * Indicates that the NCR was being aborted. - */ -#define STATE_ABORTING 3 -/* Indicates that the NCR was successfully aborted. */ -#define STATE_ABORTED 4 -/* Indicates that the NCR has been disabled due to a fatal error */ -#define STATE_DISABLED 5 - -/* - * Where knowledge of SCSI SCRIPT(tm) specified values are needed - * in an interrupt handler, an interrupt handler exists for each - * different SCSI script so we don't have name space problems. - * - * Return values of these handlers are as follows : - */ -#define SPECIFIC_INT_NOTHING 0 /* don't even restart */ -#define SPECIFIC_INT_RESTART 1 /* restart at the next instruction */ -#define SPECIFIC_INT_ABORT 2 /* recoverable error, abort cmd */ -#define SPECIFIC_INT_PANIC 3 /* unrecoverable error, panic */ -#define SPECIFIC_INT_DONE 4 /* normal command completion */ -#define SPECIFIC_INT_BREAK 5 /* break point encountered */ - -struct NCR53c7x0_hostdata { - int size; /* Size of entire Scsi_Host - structure */ - int board; /* set to board type, useful if - we have host specific things, - ie, a general purpose I/O - bit is being used to enable - termination, etc. */ - - int chip; /* set to chip type; 700-66 is - 700-66, rest are last three - digits of part number */ - - char valid_ids[8]; /* Valid SCSI ID's for adapter */ - - u32 *dsp; /* dsp to restart with after - all stacked interrupts are - handled. */ - - unsigned dsp_changed:1; /* Has dsp changed within this - set of stacked interrupts ? */ - - unsigned char dstat; /* Most recent value of dstat */ - unsigned dstat_valid:1; - - unsigned expecting_iid:1; /* Expect IID interrupt */ - unsigned expecting_sto:1; /* Expect STO interrupt */ - - /* - * The code stays cleaner if we use variables with function - * pointers and offsets that are unique for the different - * scripts rather than having a slew of switch(hostdata->chip) - * statements. - * - * It also means that the #defines from the SCSI SCRIPTS(tm) - * don't have to be visible outside of the script-specific - * instructions, preventing name space pollution. - */ - - void (* init_fixup)(struct Scsi_Host *host); - void (* init_save_regs)(struct Scsi_Host *host); - void (* dsa_fixup)(struct NCR53c7x0_cmd *cmd); - void (* soft_reset)(struct Scsi_Host *host); - int (* run_tests)(struct Scsi_Host *host); - - /* - * Called when DSTAT_SIR is set, indicating an interrupt generated - * by the INT instruction, where values are unique for each SCSI - * script. Should return one of the SPEC_* values. - */ - - int (* dstat_sir_intr)(struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd); - - int dsa_len; /* Size of DSA structure */ - - /* - * Location of DSA fields for the SCSI SCRIPT corresponding to this - * chip. - */ - - s32 dsa_start; - s32 dsa_end; - s32 dsa_next; - s32 dsa_prev; - s32 dsa_cmnd; - s32 dsa_select; - s32 dsa_msgout; - s32 dsa_cmdout; - s32 dsa_dataout; - s32 dsa_datain; - s32 dsa_msgin; - s32 dsa_msgout_other; - s32 dsa_write_sync; - s32 dsa_write_resume; - s32 dsa_check_reselect; - s32 dsa_status; - s32 dsa_saved_pointer; - s32 dsa_jump_dest; - - /* - * Important entry points that generic fixup code needs - * to know about, fixed up. - */ - - s32 E_accept_message; - s32 E_command_complete; - s32 E_data_transfer; - s32 E_dsa_code_template; - s32 E_dsa_code_template_end; - s32 E_end_data_transfer; - s32 E_msg_in; - s32 E_initiator_abort; - s32 E_other_transfer; - s32 E_other_in; - s32 E_other_out; - s32 E_target_abort; - s32 E_debug_break; - s32 E_reject_message; - s32 E_respond_message; - s32 E_select; - s32 E_select_msgout; - s32 E_test_0; - s32 E_test_1; - s32 E_test_2; - s32 E_test_3; - s32 E_dsa_zero; - s32 E_cmdout_cmdout; - s32 E_wait_reselect; - s32 E_dsa_code_begin; - - long long options; /* Bitfielded set of options enabled */ - volatile u32 test_completed; /* Test completed */ - int test_running; /* Test currently running */ - s32 test_source - __attribute__ ((aligned (4))); - volatile s32 test_dest; - - volatile int state; /* state of driver, only used for - OPTION_700 */ - - unsigned char dmode; /* - * set to the address of the DMODE - * register for this chip. - */ - unsigned char istat; /* - * set to the address of the ISTAT - * register for this chip. - */ - - int scsi_clock; /* - * SCSI clock in HZ. 0 may be used - * for unknown, although this will - * disable synchronous negotiation. - */ - - volatile int intrs; /* Number of interrupts */ - volatile int resets; /* Number of SCSI resets */ - unsigned char saved_dmode; - unsigned char saved_ctest4; - unsigned char saved_ctest7; - unsigned char saved_dcntl; - unsigned char saved_scntl3; - - unsigned char this_id_mask; - - /* Debugger information */ - struct NCR53c7x0_break *breakpoints, /* Linked list of all break points */ - *breakpoint_current; /* Current breakpoint being stepped - through, NULL if we are running - normally. */ -#ifdef NCR_DEBUG - int debug_size; /* Size of debug buffer */ - volatile int debug_count; /* Current data count */ - volatile char *debug_buf; /* Output ring buffer */ - volatile char *debug_write; /* Current write pointer */ - volatile char *debug_read; /* Current read pointer */ -#endif /* def NCR_DEBUG */ - - /* XXX - primitive debugging junk, remove when working ? */ - int debug_print_limit; /* Number of commands to print - out exhaustive debugging - information for if - OPTION_DEBUG_DUMP is set */ - - unsigned char debug_lun_limit[16]; /* If OPTION_DEBUG_TARGET_LIMIT - set, puke if commands are sent - to other target/lun combinations */ - - int debug_count_limit; /* Number of commands to execute - before puking to limit debugging - output */ - - - volatile unsigned idle:1; /* set to 1 if idle */ - - /* - * Table of synchronous+wide transfer parameters set on a per-target - * basis. - */ - - volatile struct NCR53c7x0_synchronous sync[16] - __attribute__ ((aligned (4))); - - volatile Scsi_Cmnd *issue_queue - __attribute__ ((aligned (4))); - /* waiting to be issued by - Linux driver */ - volatile struct NCR53c7x0_cmd *running_list; - /* commands running, maintained - by Linux driver */ - - volatile struct NCR53c7x0_cmd *ncrcurrent; /* currently connected - nexus, ONLY valid for - NCR53c700/NCR53c700-66 - */ - - volatile struct NCR53c7x0_cmd *spare; /* pointer to spare, - allocated at probe time, - which we can use for - initialization */ - volatile struct NCR53c7x0_cmd *free; - int max_cmd_size; /* Maximum size of NCR53c7x0_cmd - based on number of - scatter/gather segments, etc. - */ - volatile int num_cmds; /* Number of commands - allocated */ - volatile int extra_allocate; - volatile unsigned char cmd_allocated[16]; /* Have we allocated commands - for this target yet? If not, - do so ASAP */ - volatile unsigned char busy[16][8]; /* number of commands - executing on each target - */ - /* - * Eventually, I'll switch to a coroutine for calling - * cmd->done(cmd), etc. so that we can overlap interrupt - * processing with this code for maximum performance. - */ - - volatile struct NCR53c7x0_cmd *finished_queue; - - /* Shared variables between SCRIPT and host driver */ - volatile u32 *schedule - __attribute__ ((aligned (4))); /* Array of JUMPs to dsa_begin - routines of various DSAs. - When not in use, replace - with jump to next slot */ - - - volatile unsigned char msg_buf[16]; /* buffer for messages - other than the command - complete message */ - - /* Per-target default synchronous and WIDE messages */ - volatile unsigned char synchronous_want[16][5]; - volatile unsigned char wide_want[16][4]; - - /* Bit fielded set of targets we want to speak synchronously with */ - volatile u16 initiate_sdtr; - /* Bit fielded set of targets we want to speak wide with */ - volatile u16 initiate_wdtr; - /* Bit fielded list of targets we've talked to. */ - volatile u16 talked_to; - - /* Array of bit-fielded lun lists that we need to request_sense */ - volatile unsigned char request_sense[16]; - - u32 addr_reconnect_dsa_head - __attribute__ ((aligned (4))); /* RISCy style constant, - address of following */ - volatile u32 reconnect_dsa_head; - /* Data identifying nexus we are trying to match during reselection */ - volatile unsigned char reselected_identify; /* IDENTIFY message */ - volatile unsigned char reselected_tag; /* second byte of queue tag - message or 0 */ - - /* These were static variables before we moved them */ - - s32 NCR53c7xx_zero - __attribute__ ((aligned (4))); - s32 NCR53c7xx_sink; - u32 NOP_insn; - char NCR53c7xx_msg_reject; - char NCR53c7xx_msg_abort; - char NCR53c7xx_msg_nop; - - /* - * Following item introduced by RGH to support NCRc710, which is - * VERY brain-dead when it come to memory moves - */ - - /* DSA save area used only by the NCR chip */ - volatile unsigned long saved2_dsa - __attribute__ ((aligned (4))); - - volatile unsigned long emulated_intfly - __attribute__ ((aligned (4))); - - volatile int event_size, event_index; - volatile struct NCR53c7x0_event *events; - - /* If we need to generate code to kill off the currently connected - command, this is where we do it. Should have a BMI instruction - to source or sink the current data, followed by a JUMP - to abort_connected */ - - u32 *abort_script; - - int script_count; /* Size of script in words */ - u32 script[0]; /* Relocated SCSI script */ - -}; - -#define SCSI_IRQ_NONE 255 -#define DMA_NONE 255 -#define IRQ_AUTO 254 -#define DMA_AUTO 254 - -#define BOARD_GENERIC 0 - -#define NCR53c7x0_insn_size(insn) \ - (((insn) & DCMD_TYPE_MASK) == DCMD_TYPE_MMI ? 3 : 2) - - -#define NCR53c7x0_local_declare() \ - volatile unsigned char *NCR53c7x0_address_memory; \ - unsigned int NCR53c7x0_address_io; \ - int NCR53c7x0_memory_mapped - -#define NCR53c7x0_local_setup(host) \ - NCR53c7x0_address_memory = (void *) (host)->base; \ - NCR53c7x0_address_io = (unsigned int) (host)->io_port; \ - NCR53c7x0_memory_mapped = ((struct NCR53c7x0_hostdata *) \ - host->hostdata[0])-> options & OPTION_MEMORY_MAPPED - -#ifdef BIG_ENDIAN -/* These could be more efficient, given that we are always memory mapped, - * but they don't give the same problems as the write macros, so leave - * them. */ -#ifdef __mc68000__ -#define NCR53c7x0_read8(address) \ - ((unsigned int)raw_inb((u32)NCR53c7x0_address_memory + ((u32)(address)^3)) ) - -#define NCR53c7x0_read16(address) \ - ((unsigned int)raw_inw((u32)NCR53c7x0_address_memory + ((u32)(address)^2))) -#else -#define NCR53c7x0_read8(address) \ - (NCR53c7x0_memory_mapped ? \ - (unsigned int)readb((u32)NCR53c7x0_address_memory + ((u32)(address)^3)) : \ - inb(NCR53c7x0_address_io + (address))) - -#define NCR53c7x0_read16(address) \ - (NCR53c7x0_memory_mapped ? \ - (unsigned int)readw((u32)NCR53c7x0_address_memory + ((u32)(address)^2)) : \ - inw(NCR53c7x0_address_io + (address))) -#endif /* mc68000 */ -#else -#define NCR53c7x0_read8(address) \ - (NCR53c7x0_memory_mapped ? \ - (unsigned int)readb((u32)NCR53c7x0_address_memory + (u32)(address)) : \ - inb(NCR53c7x0_address_io + (address))) - -#define NCR53c7x0_read16(address) \ - (NCR53c7x0_memory_mapped ? \ - (unsigned int)readw((u32)NCR53c7x0_address_memory + (u32)(address)) : \ - inw(NCR53c7x0_address_io + (address))) -#endif - -#ifdef __mc68000__ -#define NCR53c7x0_read32(address) \ - ((unsigned int) raw_inl((u32)NCR53c7x0_address_memory + (u32)(address))) -#else -#define NCR53c7x0_read32(address) \ - (NCR53c7x0_memory_mapped ? \ - (unsigned int) readl((u32)NCR53c7x0_address_memory + (u32)(address)) : \ - inl(NCR53c7x0_address_io + (address))) -#endif /* mc68000*/ - -#ifdef BIG_ENDIAN -/* If we are big-endian, then we are not Intel, so probably don't have - * an i/o map as well as a memory map. So, let's assume memory mapped. - * Also, I am having terrible problems trying to persuade the compiler - * not to lay down code which does a read after write for these macros. - * If you remove 'volatile' from writeb() and friends it is ok.... - */ - -#define NCR53c7x0_write8(address,value) \ - *(volatile unsigned char *) \ - ((u32)NCR53c7x0_address_memory + ((u32)(address)^3)) = (value) - -#define NCR53c7x0_write16(address,value) \ - *(volatile unsigned short *) \ - ((u32)NCR53c7x0_address_memory + ((u32)(address)^2)) = (value) - -#define NCR53c7x0_write32(address,value) \ - *(volatile unsigned long *) \ - ((u32)NCR53c7x0_address_memory + ((u32)(address))) = (value) - -#else - -#define NCR53c7x0_write8(address,value) \ - (NCR53c7x0_memory_mapped ? \ - ({writeb((value), (u32)NCR53c7x0_address_memory + (u32)(address)); mb();}) : \ - outb((value), NCR53c7x0_address_io + (address))) - -#define NCR53c7x0_write16(address,value) \ - (NCR53c7x0_memory_mapped ? \ - ({writew((value), (u32)NCR53c7x0_address_memory + (u32)(address)); mb();}) : \ - outw((value), NCR53c7x0_address_io + (address))) - -#define NCR53c7x0_write32(address,value) \ - (NCR53c7x0_memory_mapped ? \ - ({writel((value), (u32)NCR53c7x0_address_memory + (u32)(address)); mb();}) : \ - outl((value), NCR53c7x0_address_io + (address))) - -#endif - -/* Patch arbitrary 32 bit words in the script */ -#define patch_abs_32(script, offset, symbol, value) \ - for (i = 0; i < (sizeof (A_##symbol##_used) / sizeof \ - (u32)); ++i) { \ - (script)[A_##symbol##_used[i] - (offset)] += (value); \ - if (hostdata->options & OPTION_DEBUG_FIXUP) \ - printk("scsi%d : %s reference %d at 0x%x in %s is now 0x%x\n",\ - host->host_no, #symbol, i, A_##symbol##_used[i] - \ - (int)(offset), #script, (script)[A_##symbol##_used[i] - \ - (offset)]); \ - } - -/* Patch read/write instruction immediate field */ -#define patch_abs_rwri_data(script, offset, symbol, value) \ - for (i = 0; i < (sizeof (A_##symbol##_used) / sizeof \ - (u32)); ++i) \ - (script)[A_##symbol##_used[i] - (offset)] = \ - ((script)[A_##symbol##_used[i] - (offset)] & \ - ~DBC_RWRI_IMMEDIATE_MASK) | \ - (((value) << DBC_RWRI_IMMEDIATE_SHIFT) & \ - DBC_RWRI_IMMEDIATE_MASK) - -/* Patch transfer control instruction data field */ -#define patch_abs_tci_data(script, offset, symbol, value) \ - for (i = 0; i < (sizeof (A_##symbol##_used) / sizeof \ - (u32)); ++i) \ - (script)[A_##symbol##_used[i] - (offset)] = \ - ((script)[A_##symbol##_used[i] - (offset)] & \ - ~DBC_TCI_DATA_MASK) | \ - (((value) << DBC_TCI_DATA_SHIFT) & \ - DBC_TCI_DATA_MASK) - -/* Patch field in dsa structure (assignment should be +=?) */ -#define patch_dsa_32(dsa, symbol, word, value) \ - { \ - (dsa)[(hostdata->##symbol - hostdata->dsa_start) / sizeof(u32) \ - + (word)] = (value); \ - if (hostdata->options & OPTION_DEBUG_DSA) \ - printk("scsi : dsa %s symbol %s(%d) word %d now 0x%x\n", \ - #dsa, #symbol, hostdata->##symbol, \ - (word), (u32) (value)); \ - } - -/* Paranoid people could use panic() here. */ -#define FATAL(host) shutdown((host)); - -extern int ncr53c7xx_init(struct scsi_host_template *tpnt, int board, int chip, - unsigned long base, int io_port, int irq, int dma, - long long options, int clock); - -#endif /* NCR53c710_C */ -#endif /* NCR53c710_H */ diff --git a/drivers/scsi/53c7xx.scr b/drivers/scsi/53c7xx.scr deleted file mode 100644 index 9c5694a2da8..00000000000 --- a/drivers/scsi/53c7xx.scr +++ /dev/null @@ -1,1591 +0,0 @@ -#undef DEBUG -#undef EVENTS -#undef NO_SELECTION_TIMEOUT -#define BIG_ENDIAN - -; 53c710 driver. Modified from Drew Eckhardts driver -; for 53c810 by Richard Hirst [richard@sleepie.demon.co.uk] -; -; I have left the script for the 53c8xx family in here, as it is likely -; to be useful to see what I changed when bug hunting. - -; NCR 53c810 driver, main script -; Sponsored by -; iX Multiuser Multitasking Magazine -; hm@ix.de -; -; Copyright 1993, 1994, 1995 Drew Eckhardt -; Visionary Computing -; (Unix and Linux consulting and custom programming) -; drew@PoohSticks.ORG -; +1 (303) 786-7975 -; -; TolerANT and SCSI SCRIPTS are registered trademarks of NCR Corporation. -; -; PRE-ALPHA -; -; For more information, please consult -; -; NCR 53C810 -; PCI-SCSI I/O Processor -; Data Manual -; -; NCR 53C710 -; SCSI I/O Processor -; Programmers Guide -; -; NCR Microelectronics -; 1635 Aeroplaza Drive -; Colorado Springs, CO 80916 -; 1+ (719) 578-3400 -; -; Toll free literature number -; +1 (800) 334-5454 -; -; IMPORTANT : This code is self modifying due to the limitations of -; the NCR53c7,8xx series chips. Persons debugging this code with -; the remote debugger should take this into account, and NOT set -; breakpoints in modified instructions. -; -; Design: -; The NCR53c7,8xx family of SCSI chips are busmasters with an onboard -; microcontroller using a simple instruction set. -; -; So, to minimize the effects of interrupt latency, and to maximize -; throughput, this driver offloads the practical maximum amount -; of processing to the SCSI chip while still maintaining a common -; structure. -; -; Where tradeoffs were needed between efficiency on the older -; chips and the newer NCR53c800 series, the NCR53c800 series -; was chosen. -; -; While the NCR53c700 and NCR53c700-66 lacked the facilities to fully -; automate SCSI transfers without host processor intervention, this -; isn't the case with the NCR53c710 and newer chips which allow -; -; - reads and writes to the internal registers from within the SCSI -; scripts, allowing the SCSI SCRIPTS(tm) code to save processor -; state so that multiple threads of execution are possible, and also -; provide an ALU for loop control, etc. -; -; - table indirect addressing for some instructions. This allows -; pointers to be located relative to the DSA ((Data Structure -; Address) register. -; -; These features make it possible to implement a mailbox style interface, -; where the same piece of code is run to handle I/O for multiple threads -; at once minimizing our need to relocate code. Since the NCR53c700/ -; NCR53c800 series have a unique combination of features, making a -; a standard ingoing/outgoing mailbox system, costly, I've modified it. -; -; - Mailboxes are a mixture of code and data. This lets us greatly -; simplify the NCR53c810 code and do things that would otherwise -; not be possible. -; -; The saved data pointer is now implemented as follows : -; -; Control flow has been architected such that if control reaches -; munge_save_data_pointer, on a restore pointers message or -; reconnection, a jump to the address formerly in the TEMP register -; will allow the SCSI command to resume execution. -; - -; -; Note : the DSA structures must be aligned on 32 bit boundaries, -; since the source and destination of MOVE MEMORY instructions -; must share the same alignment and this is the alignment of the -; NCR registers. -; - -; For some systems (MVME166, for example) dmode is always the same, so don't -; waste time writing it - -#if 1 -#define DMODE_MEMORY_TO_NCR -#define DMODE_MEMORY_TO_MEMORY -#define DMODE_NCR_TO_MEMORY -#else -#define DMODE_MEMORY_TO_NCR MOVE dmode_memory_to_ncr TO DMODE -#define DMODE_MEMORY_TO_MEMORY MOVE dmode_memory_to_memory TO DMODE -#define DMODE_NCR_TO_MEMORY MOVE dmode_ncr_to_memory TO DMODE -#endif - -ABSOLUTE dsa_temp_lun = 0 ; Patch to lun for current dsa -ABSOLUTE dsa_temp_next = 0 ; Patch to dsa next for current dsa -ABSOLUTE dsa_temp_addr_next = 0 ; Patch to address of dsa next address - ; for current dsa -ABSOLUTE dsa_temp_sync = 0 ; Patch to address of per-target - ; sync routine -ABSOLUTE dsa_sscf_710 = 0 ; Patch to address of per-target - ; sscf value (53c710) -ABSOLUTE dsa_temp_target = 0 ; Patch to id for current dsa -ABSOLUTE dsa_temp_addr_saved_pointer = 0; Patch to address of per-command - ; saved data pointer -ABSOLUTE dsa_temp_addr_residual = 0 ; Patch to address of per-command - ; current residual code -ABSOLUTE dsa_temp_addr_saved_residual = 0; Patch to address of per-command - ; saved residual code -ABSOLUTE dsa_temp_addr_new_value = 0 ; Address of value for JUMP operand -ABSOLUTE dsa_temp_addr_array_value = 0 ; Address to copy to -ABSOLUTE dsa_temp_addr_dsa_value = 0 ; Address of this DSA value - -; -; Once a device has initiated reselection, we need to compare it -; against the singly linked list of commands which have disconnected -; and are pending reselection. These commands are maintained in -; an unordered singly linked list of DSA structures, through the -; DSA pointers at their 'centers' headed by the reconnect_dsa_head -; pointer. -; -; To avoid complications in removing commands from the list, -; I minimize the amount of expensive (at eight operations per -; addition @ 500-600ns each) pointer operations which must -; be done in the NCR driver by precomputing them on the -; host processor during dsa structure generation. -; -; The fixed-up per DSA code knows how to recognize the nexus -; associated with the corresponding SCSI command, and modifies -; the source and destination pointers for the MOVE MEMORY -; instruction which is executed when reselected_ok is called -; to remove the command from the list. Similarly, DSA is -; loaded with the address of the next DSA structure and -; reselected_check_next is called if a failure occurs. -; -; Perhaps more concisely, the net effect of the mess is -; -; for (dsa = reconnect_dsa_head, dest = &reconnect_dsa_head, -; src = NULL; dsa; dest = &dsa->next, dsa = dsa->next) { -; src = &dsa->next; -; if (target_id == dsa->id && target_lun == dsa->lun) { -; *dest = *src; -; break; -; } -; } -; -; if (!dsa) -; error (int_err_unexpected_reselect); -; else -; longjmp (dsa->jump_resume, 0); -; -; - -#if (CHIP != 700) && (CHIP != 70066) -; Define DSA structure used for mailboxes -ENTRY dsa_code_template -dsa_code_template: -ENTRY dsa_code_begin -dsa_code_begin: -; RGH: Don't care about TEMP and DSA here - DMODE_MEMORY_TO_NCR - MOVE MEMORY 4, dsa_temp_addr_dsa_value, addr_scratch - DMODE_MEMORY_TO_MEMORY -#if (CHIP == 710) - MOVE MEMORY 4, addr_scratch, saved_dsa - ; We are about to go and select the device, so must set SSCF bits - MOVE MEMORY 4, dsa_sscf_710, addr_scratch -#ifdef BIG_ENDIAN - MOVE SCRATCH3 TO SFBR -#else - MOVE SCRATCH0 TO SFBR -#endif - MOVE SFBR TO SBCL - MOVE MEMORY 4, saved_dsa, addr_dsa -#else - CALL scratch_to_dsa -#endif - CALL select -; Handle the phase mismatch which may have resulted from the -; MOVE FROM dsa_msgout if we returned here. The CLEAR ATN -; may or may not be necessary, and we should update script_asm.pl -; to handle multiple pieces. - CLEAR ATN - CLEAR ACK - -; Replace second operand with address of JUMP instruction dest operand -; in schedule table for this DSA. Becomes dsa_jump_dest in 53c7,8xx.c. -ENTRY dsa_code_fix_jump -dsa_code_fix_jump: - MOVE MEMORY 4, NOP_insn, 0 - JUMP select_done - -; wrong_dsa loads the DSA register with the value of the dsa_next -; field. -; -wrong_dsa: -#if (CHIP == 710) -; NOTE DSA is corrupt when we arrive here! -#endif -; Patch the MOVE MEMORY INSTRUCTION such that -; the destination address is the address of the OLD -; next pointer. -; - MOVE MEMORY 4, dsa_temp_addr_next, reselected_ok_patch + 8 - DMODE_MEMORY_TO_NCR -; -; Move the _contents_ of the next pointer into the DSA register as -; the next I_T_L or I_T_L_Q tupple to check against the established -; nexus. -; - MOVE MEMORY 4, dsa_temp_next, addr_scratch - DMODE_MEMORY_TO_MEMORY -#if (CHIP == 710) - MOVE MEMORY 4, addr_scratch, saved_dsa - MOVE MEMORY 4, saved_dsa, addr_dsa -#else - CALL scratch_to_dsa -#endif - JUMP reselected_check_next - -ABSOLUTE dsa_save_data_pointer = 0 -ENTRY dsa_code_save_data_pointer -dsa_code_save_data_pointer: -#if (CHIP == 710) - ; When we get here, TEMP has been saved in jump_temp+4, DSA is corrupt - ; We MUST return with DSA correct - MOVE MEMORY 4, jump_temp+4, dsa_temp_addr_saved_pointer -; HARD CODED : 24 bytes needs to agree with 53c7,8xx.h - MOVE MEMORY 24, dsa_temp_addr_residual, dsa_temp_addr_saved_residual - CLEAR ACK -#ifdef DEBUG - INT int_debug_saved -#endif - MOVE MEMORY 4, saved_dsa, addr_dsa - JUMP jump_temp -#else - DMODE_NCR_TO_MEMORY - MOVE MEMORY 4, addr_temp, dsa_temp_addr_saved_pointer - DMODE_MEMORY_TO_MEMORY -; HARD CODED : 24 bytes needs to agree with 53c7,8xx.h - MOVE MEMORY 24, dsa_temp_addr_residual, dsa_temp_addr_saved_residual - CLEAR ACK -#ifdef DEBUG - INT int_debug_saved -#endif - RETURN -#endif -ABSOLUTE dsa_restore_pointers = 0 -ENTRY dsa_code_restore_pointers -dsa_code_restore_pointers: -#if (CHIP == 710) - ; TEMP and DSA are corrupt when we get here, but who cares! - MOVE MEMORY 4, dsa_temp_addr_saved_pointer, jump_temp + 4 -; HARD CODED : 24 bytes needs to agree with 53c7,8xx.h - MOVE MEMORY 24, dsa_temp_addr_saved_residual, dsa_temp_addr_residual - CLEAR ACK - ; Restore DSA, note we don't care about TEMP - MOVE MEMORY 4, saved_dsa, addr_dsa -#ifdef DEBUG - INT int_debug_restored -#endif - JUMP jump_temp -#else - DMODE_MEMORY_TO_NCR - MOVE MEMORY 4, dsa_temp_addr_saved_pointer, addr_temp - DMODE_MEMORY_TO_MEMORY -; HARD CODED : 24 bytes needs to agree with 53c7,8xx.h - MOVE MEMORY 24, dsa_temp_addr_saved_residual, dsa_temp_addr_residual - CLEAR ACK -#ifdef DEBUG - INT int_debug_restored -#endif - RETURN -#endif - -ABSOLUTE dsa_check_reselect = 0 -; dsa_check_reselect determines whether or not the current target and -; lun match the current DSA -ENTRY dsa_code_check_reselect -dsa_code_check_reselect: -#if (CHIP == 710) - /* Arrives here with DSA correct */ - /* Assumes we are always ID 7 */ - MOVE LCRC TO SFBR ; LCRC has our ID and his ID bits set - JUMP REL (wrong_dsa), IF NOT dsa_temp_target, AND MASK 0x80 -#else - MOVE SSID TO SFBR ; SSID contains 3 bit target ID -; FIXME : we need to accommodate bit fielded and binary here for '7xx/'8xx chips - JUMP REL (wrong_dsa), IF NOT dsa_temp_target, AND MASK 0xf8 -#endif -; -; Hack - move to scratch first, since SFBR is not writeable -; via the CPU and hence a MOVE MEMORY instruction. -; - DMODE_MEMORY_TO_NCR - MOVE MEMORY 1, reselected_identify, addr_scratch - DMODE_MEMORY_TO_MEMORY -#ifdef BIG_ENDIAN - ; BIG ENDIAN ON MVME16x - MOVE SCRATCH3 TO SFBR -#else - MOVE SCRATCH0 TO SFBR -#endif -; FIXME : we need to accommodate bit fielded and binary here for '7xx/'8xx chips -; Are you sure about that? richard@sleepie.demon.co.uk - JUMP REL (wrong_dsa), IF NOT dsa_temp_lun, AND MASK 0xf8 -; Patch the MOVE MEMORY INSTRUCTION such that -; the source address is the address of this dsa's -; next pointer. - MOVE MEMORY 4, dsa_temp_addr_next, reselected_ok_patch + 4 - CALL reselected_ok -#if (CHIP == 710) -; Restore DSA following memory moves in reselected_ok -; dsa_temp_sync doesn't really care about DSA, but it has an -; optional debug INT so a valid DSA is a good idea. - MOVE MEMORY 4, saved_dsa, addr_dsa -#endif - CALL dsa_temp_sync -; Release ACK on the IDENTIFY message _after_ we've set the synchronous -; transfer parameters! - CLEAR ACK -; Implicitly restore pointers on reselection, so a RETURN -; will transfer control back to the right spot. - CALL REL (dsa_code_restore_pointers) - RETURN -ENTRY dsa_zero -dsa_zero: -ENTRY dsa_code_template_end -dsa_code_template_end: - -; Perform sanity check for dsa_fields_start == dsa_code_template_end - -; dsa_zero, puke. - -ABSOLUTE dsa_fields_start = 0 ; Sanity marker - ; pad 48 bytes (fix this RSN) -ABSOLUTE dsa_next = 48 ; len 4 Next DSA - ; del 4 Previous DSA address -ABSOLUTE dsa_cmnd = 56 ; len 4 Scsi_Cmnd * for this thread. -ABSOLUTE dsa_select = 60 ; len 4 Device ID, Period, Offset for - ; table indirect select -ABSOLUTE dsa_msgout = 64 ; len 8 table indirect move parameter for - ; select message -ABSOLUTE dsa_cmdout = 72 ; len 8 table indirect move parameter for - ; command -ABSOLUTE dsa_dataout = 80 ; len 4 code pointer for dataout -ABSOLUTE dsa_datain = 84 ; len 4 code pointer for datain -ABSOLUTE dsa_msgin = 88 ; len 8 table indirect move for msgin -ABSOLUTE dsa_status = 96 ; len 8 table indirect move for status byte -ABSOLUTE dsa_msgout_other = 104 ; len 8 table indirect for normal message out - ; (Synchronous transfer negotiation, etc). -ABSOLUTE dsa_end = 112 - -ABSOLUTE schedule = 0 ; Array of JUMP dsa_begin or JUMP (next), - ; terminated by a call to JUMP wait_reselect - -; Linked lists of DSA structures -ABSOLUTE reconnect_dsa_head = 0 ; Link list of DSAs which can reconnect -ABSOLUTE addr_reconnect_dsa_head = 0 ; Address of variable containing - ; address of reconnect_dsa_head - -; These select the source and destination of a MOVE MEMORY instruction -ABSOLUTE dmode_memory_to_memory = 0x0 -ABSOLUTE dmode_memory_to_ncr = 0x0 -ABSOLUTE dmode_ncr_to_memory = 0x0 - -ABSOLUTE addr_scratch = 0x0 -ABSOLUTE addr_temp = 0x0 -#if (CHIP == 710) -ABSOLUTE saved_dsa = 0x0 -ABSOLUTE emulfly = 0x0 -ABSOLUTE addr_dsa = 0x0 -#endif -#endif /* CHIP != 700 && CHIP != 70066 */ - -; Interrupts - -; MSB indicates type -; 0 handle error condition -; 1 handle message -; 2 handle normal condition -; 3 debugging interrupt -; 4 testing interrupt -; Next byte indicates specific error - -; XXX not yet implemented, I'm not sure if I want to - -; Next byte indicates the routine the error occurred in -; The LSB indicates the specific place the error occurred - -ABSOLUTE int_err_unexpected_phase = 0x00000000 ; Unexpected phase encountered -ABSOLUTE int_err_selected = 0x00010000 ; SELECTED (nee RESELECTED) -ABSOLUTE int_err_unexpected_reselect = 0x00020000 -ABSOLUTE int_err_check_condition = 0x00030000 -ABSOLUTE int_err_no_phase = 0x00040000 -ABSOLUTE int_msg_wdtr = 0x01000000 ; WDTR message received -ABSOLUTE int_msg_sdtr = 0x01010000 ; SDTR received -ABSOLUTE int_msg_1 = 0x01020000 ; single byte special message - ; received - -ABSOLUTE int_norm_select_complete = 0x02000000 ; Select complete, reprogram - ; registers. -ABSOLUTE int_norm_reselect_complete = 0x02010000 ; Nexus established -ABSOLUTE int_norm_command_complete = 0x02020000 ; Command complete -ABSOLUTE int_norm_disconnected = 0x02030000 ; Disconnected -ABSOLUTE int_norm_aborted =0x02040000 ; Aborted *dsa -ABSOLUTE int_norm_reset = 0x02050000 ; Generated BUS reset. -ABSOLUTE int_norm_emulateintfly = 0x02060000 ; 53C710 Emulated intfly -ABSOLUTE int_debug_break = 0x03000000 ; Break point -#ifdef DEBUG -ABSOLUTE int_debug_scheduled = 0x03010000 ; new I/O scheduled -ABSOLUTE int_debug_idle = 0x03020000 ; scheduler is idle -ABSOLUTE int_debug_dsa_loaded = 0x03030000 ; dsa reloaded -ABSOLUTE int_debug_reselected = 0x03040000 ; NCR reselected -ABSOLUTE int_debug_head = 0x03050000 ; issue head overwritten -ABSOLUTE int_debug_disconnected = 0x03060000 ; disconnected -ABSOLUTE int_debug_disconnect_msg = 0x03070000 ; got message to disconnect -ABSOLUTE int_debug_dsa_schedule = 0x03080000 ; in dsa_schedule -ABSOLUTE int_debug_reselect_check = 0x03090000 ; Check for reselection of DSA -ABSOLUTE int_debug_reselected_ok = 0x030a0000 ; Reselection accepted -#endif -ABSOLUTE int_debug_panic = 0x030b0000 ; Panic driver -#ifdef DEBUG -ABSOLUTE int_debug_saved = 0x030c0000 ; save/restore pointers -ABSOLUTE int_debug_restored = 0x030d0000 -ABSOLUTE int_debug_sync = 0x030e0000 ; Sanity check synchronous - ; parameters. -ABSOLUTE int_debug_datain = 0x030f0000 ; going into data in phase - ; now. -ABSOLUTE int_debug_check_dsa = 0x03100000 ; Sanity check DSA against - ; SDID. -#endif - -ABSOLUTE int_test_1 = 0x04000000 ; Test 1 complete -ABSOLUTE int_test_2 = 0x04010000 ; Test 2 complete -ABSOLUTE int_test_3 = 0x04020000 ; Test 3 complete - - -; These should start with 0x05000000, with low bits incrementing for -; each one. - -#ifdef EVENTS -ABSOLUTE int_EVENT_SELECT = 0 -ABSOLUTE int_EVENT_DISCONNECT = 0 -ABSOLUTE int_EVENT_RESELECT = 0 -ABSOLUTE int_EVENT_COMPLETE = 0 -ABSOLUTE int_EVENT_IDLE = 0 -ABSOLUTE int_EVENT_SELECT_FAILED = 0 -ABSOLUTE int_EVENT_BEFORE_SELECT = 0 -ABSOLUTE int_EVENT_RESELECT_FAILED = 0 -#endif - -ABSOLUTE NCR53c7xx_msg_abort = 0 ; Pointer to abort message -ABSOLUTE NCR53c7xx_msg_reject = 0 ; Pointer to reject message -ABSOLUTE NCR53c7xx_zero = 0 ; long with zero in it, use for source -ABSOLUTE NCR53c7xx_sink = 0 ; long to dump worthless data in -ABSOLUTE NOP_insn = 0 ; NOP instruction - -; Pointer to message, potentially multi-byte -ABSOLUTE msg_buf = 0 - -; Pointer to holding area for reselection information -ABSOLUTE reselected_identify = 0 -ABSOLUTE reselected_tag = 0 - -; Request sense command pointer, it's a 6 byte command, should -; be constant for all commands since we always want 16 bytes of -; sense and we don't need to change any fields as we did under -; SCSI-I when we actually cared about the LUN field. -;EXTERNAL NCR53c7xx_sense ; Request sense command - -#if (CHIP != 700) && (CHIP != 70066) -; dsa_schedule -; PURPOSE : after a DISCONNECT message has been received, and pointers -; saved, insert the current DSA structure at the head of the -; disconnected queue and fall through to the scheduler. -; -; CALLS : OK -; -; INPUTS : dsa - current DSA structure, reconnect_dsa_head - list -; of disconnected commands -; -; MODIFIES : SCRATCH, reconnect_dsa_head -; -; EXITS : always passes control to schedule - -ENTRY dsa_schedule -dsa_schedule: -#ifdef DEBUG - INT int_debug_dsa_schedule -#endif - -; -; Calculate the address of the next pointer within the DSA -; structure of the command that is currently disconnecting -; -#if (CHIP == 710) - ; Read what should be the current DSA from memory - actual DSA - ; register is probably corrupt - MOVE MEMORY 4, saved_dsa, addr_scratch -#else - CALL dsa_to_scratch -#endif - MOVE SCRATCH0 + dsa_next TO SCRATCH0 - MOVE SCRATCH1 + 0 TO SCRATCH1 WITH CARRY - MOVE SCRATCH2 + 0 TO SCRATCH2 WITH CARRY - MOVE SCRATCH3 + 0 TO SCRATCH3 WITH CARRY - -; Point the next field of this DSA structure at the current disconnected -; list - DMODE_NCR_TO_MEMORY - MOVE MEMORY 4, addr_scratch, dsa_schedule_insert + 8 - DMODE_MEMORY_TO_MEMORY -dsa_schedule_insert: - MOVE MEMORY 4, reconnect_dsa_head, 0 - -; And update the head pointer. -#if (CHIP == 710) - ; Read what should be the current DSA from memory - actual DSA - ; register is probably corrupt - MOVE MEMORY 4, saved_dsa, addr_scratch -#else - CALL dsa_to_scratch -#endif - DMODE_NCR_TO_MEMORY - MOVE MEMORY 4, addr_scratch, reconnect_dsa_head - DMODE_MEMORY_TO_MEMORY -/* Temporarily, see what happens. */ -#ifndef ORIGINAL -#if (CHIP != 710) - MOVE SCNTL2 & 0x7f TO SCNTL2 -#endif - CLEAR ACK -#endif -#if (CHIP == 710) - ; Time to correct DSA following memory move - MOVE MEMORY 4, saved_dsa, addr_dsa -#endif - WAIT DISCONNECT -#ifdef EVENTS - INT int_EVENT_DISCONNECT; -#endif -#ifdef DEBUG - INT int_debug_disconnected -#endif - JUMP schedule -#endif - -; -; select -; -; PURPOSE : establish a nexus for the SCSI command referenced by DSA. -; On success, the current DSA structure is removed from the issue -; queue. Usually, this is entered as a fall-through from schedule, -; although the contingent allegiance handling code will write -; the select entry address to the DSP to restart a command as a -; REQUEST SENSE. A message is sent (usually IDENTIFY, although -; additional SDTR or WDTR messages may be sent). COMMAND OUT -; is handled. -; -; INPUTS : DSA - SCSI command, issue_dsa_head -; -; CALLS : NOT OK -; -; MODIFIES : SCRATCH, issue_dsa_head -; -; EXITS : on reselection or selection, go to select_failed -; otherwise, RETURN so control is passed back to -; dsa_begin. -; - -ENTRY select -select: - -#ifdef EVENTS - INT int_EVENT_BEFORE_SELECT -#endif - -#ifdef DEBUG - INT int_debug_scheduled -#endif - CLEAR TARGET - -; XXX -; -; In effect, SELECTION operations are backgrounded, with execution -; continuing until code which waits for REQ or a fatal interrupt is -; encountered. -; -; So, for more performance, we could overlap the code which removes -; the command from the NCRs issue queue with the selection, but -; at this point I don't want to deal with the error recovery. -; - -#if (CHIP != 700) && (CHIP != 70066) -#if (CHIP == 710) - ; Enable selection timer -#ifdef NO_SELECTION_TIMEOUT - MOVE CTEST7 & 0xff TO CTEST7 -#else - MOVE CTEST7 & 0xef TO CTEST7 -#endif -#endif - SELECT ATN FROM dsa_select, select_failed - JUMP select_msgout, WHEN MSG_OUT -ENTRY select_msgout -select_msgout: -#if (CHIP == 710) - ; Disable selection timer - MOVE CTEST7 | 0x10 TO CTEST7 -#endif - MOVE FROM dsa_msgout, WHEN MSG_OUT -#else -ENTRY select_msgout - SELECT ATN 0, select_failed -select_msgout: - MOVE 0, 0, WHEN MSGOUT -#endif - -#ifdef EVENTS - INT int_EVENT_SELECT -#endif - RETURN - -; -; select_done -; -; PURPOSE: continue on to normal data transfer; called as the exit -; point from dsa_begin. -; -; INPUTS: dsa -; -; CALLS: OK -; -; - -select_done: -#if (CHIP == 710) -; NOTE DSA is corrupt when we arrive here! - MOVE MEMORY 4, saved_dsa, addr_dsa -#endif - -#ifdef DEBUG -ENTRY select_check_dsa -select_check_dsa: - INT int_debug_check_dsa -#endif - -; After a successful selection, we should get either a CMD phase or -; some transfer request negotiation message. - - JUMP cmdout, WHEN CMD - INT int_err_unexpected_phase, WHEN NOT MSG_IN - -select_msg_in: - CALL msg_in, WHEN MSG_IN - JUMP select_msg_in, WHEN MSG_IN - -cmdout: - INT int_err_unexpected_phase, WHEN NOT CMD -#if (CHIP == 700) - INT int_norm_selected -#endif -ENTRY cmdout_cmdout -cmdout_cmdout: -#if (CHIP != 700) && (CHIP != 70066) - MOVE FROM dsa_cmdout, WHEN CMD -#else - MOVE 0, 0, WHEN CMD -#endif /* (CHIP != 700) && (CHIP != 70066) */ - -; -; data_transfer -; other_out -; other_in -; other_transfer -; -; PURPOSE : handle the main data transfer for a SCSI command in -; several parts. In the first part, data_transfer, DATA_IN -; and DATA_OUT phases are allowed, with the user provided -; code (usually dynamically generated based on the scatter/gather -; list associated with a SCSI command) called to handle these -; phases. -; -; After control has passed to one of the user provided -; DATA_IN or DATA_OUT routines, back calls are made to -; other_transfer_in or other_transfer_out to handle non-DATA IN -; and DATA OUT phases respectively, with the state of the active -; data pointer being preserved in TEMP. -; -; On completion, the user code passes control to other_transfer -; which causes DATA_IN and DATA_OUT to result in unexpected_phase -; interrupts so that data overruns may be trapped. -; -; INPUTS : DSA - SCSI command -; -; CALLS : OK in data_transfer_start, not ok in other_out and other_in, ok in -; other_transfer -; -; MODIFIES : SCRATCH -; -; EXITS : if STATUS IN is detected, signifying command completion, -; the NCR jumps to command_complete. If MSG IN occurs, a -; CALL is made to msg_in. Otherwise, other_transfer runs in -; an infinite loop. -; - -ENTRY data_transfer -data_transfer: - JUMP cmdout_cmdout, WHEN CMD - CALL msg_in, WHEN MSG_IN - INT int_err_unexpected_phase, WHEN MSG_OUT - JUMP do_dataout, WHEN DATA_OUT - JUMP do_datain, WHEN DATA_IN - JUMP command_complete, WHEN STATUS - JUMP data_transfer -ENTRY end_data_transfer -end_data_transfer: - -; -; FIXME: On NCR53c700 and NCR53c700-66 chips, do_dataout/do_datain -; should be fixed up whenever the nexus changes so it can point to the -; correct routine for that command. -; - -#if (CHIP != 700) && (CHIP != 70066) -; Nasty jump to dsa->dataout -do_dataout: -#if (CHIP == 710) - MOVE MEMORY 4, saved_dsa, addr_scratch -#else - CALL dsa_to_scratch -#endif - MOVE SCRATCH0 + dsa_dataout TO SCRATCH0 - MOVE SCRATCH1 + 0 TO SCRATCH1 WITH CARRY - MOVE SCRATCH2 + 0 TO SCRATCH2 WITH CARRY - MOVE SCRATCH3 + 0 TO SCRATCH3 WITH CARRY - DMODE_NCR_TO_MEMORY - MOVE MEMORY 4, addr_scratch, dataout_to_jump + 4 - DMODE_MEMORY_TO_MEMORY -dataout_to_jump: - MOVE MEMORY 4, 0, dataout_jump + 4 -#if (CHIP == 710) - ; Time to correct DSA following memory move - MOVE MEMORY 4, saved_dsa, addr_dsa -#endif -dataout_jump: - JUMP 0 - -; Nasty jump to dsa->dsain -do_datain: -#if (CHIP == 710) - MOVE MEMORY 4, saved_dsa, addr_scratch -#else - CALL dsa_to_scratch -#endif - MOVE SCRATCH0 + dsa_datain TO SCRATCH0 - MOVE SCRATCH1 + 0 TO SCRATCH1 WITH CARRY - MOVE SCRATCH2 + 0 TO SCRATCH2 WITH CARRY - MOVE SCRATCH3 + 0 TO SCRATCH3 WITH CARRY - DMODE_NCR_TO_MEMORY - MOVE MEMORY 4, addr_scratch, datain_to_jump + 4 - DMODE_MEMORY_TO_MEMORY -ENTRY datain_to_jump -datain_to_jump: - MOVE MEMORY 4, 0, datain_jump + 4 -#if (CHIP == 710) - ; Time to correct DSA following memory move - MOVE MEMORY 4, saved_dsa, addr_dsa -#endif -#ifdef DEBUG - INT int_debug_datain -#endif -datain_jump: - JUMP 0 -#endif /* (CHIP != 700) && (CHIP != 70066) */ - - -; Note that other_out and other_in loop until a non-data phase -; is discovered, so we only execute return statements when we -; can go on to the next data phase block move statement. - -ENTRY other_out -other_out: -#if 0 - INT 0x03ffdead -#endif - INT int_err_unexpected_phase, WHEN CMD - JUMP msg_in_restart, WHEN MSG_IN - INT int_err_unexpected_phase, WHEN MSG_OUT - INT int_err_unexpected_phase, WHEN DATA_IN - JUMP command_complete, WHEN STATUS - JUMP other_out, WHEN NOT DATA_OUT -#if (CHIP == 710) -; TEMP should be OK, as we got here from a call in the user dataout code. -#endif - RETURN - -ENTRY other_in -other_in: -#if 0 - INT 0x03ffdead -#endif - INT int_err_unexpected_phase, WHEN CMD - JUMP msg_in_restart, WHEN MSG_IN - INT int_err_unexpected_phase, WHEN MSG_OUT - INT int_err_unexpected_phase, WHEN DATA_OUT - JUMP command_complete, WHEN STATUS - JUMP other_in, WHEN NOT DATA_IN -#if (CHIP == 710) -; TEMP should be OK, as we got here from a call in the user datain code. -#endif - RETURN - - -ENTRY other_transfer -other_transfer: - INT int_err_unexpected_phase, WHEN CMD - CALL msg_in, WHEN MSG_IN - INT int_err_unexpected_phase, WHEN MSG_OUT - INT int_err_unexpected_phase, WHEN DATA_OUT - INT int_err_unexpected_phase, WHEN DATA_IN - JUMP command_complete, WHEN STATUS - JUMP other_transfer - -; -; msg_in_restart -; msg_in -; munge_msg -; -; PURPOSE : process messages from a target. msg_in is called when the -; caller hasn't read the first byte of the message. munge_message -; is called when the caller has read the first byte of the message, -; and left it in SFBR. msg_in_restart is called when the caller -; hasn't read the first byte of the message, and wishes RETURN -; to transfer control back to the address of the conditional -; CALL instruction rather than to the instruction after it. -; -; Various int_* interrupts are generated when the host system -; needs to intervene, as is the case with SDTR, WDTR, and -; INITIATE RECOVERY messages. -; -; When the host system handles one of these interrupts, -; it can respond by reentering at reject_message, -; which rejects the message and returns control to -; the caller of msg_in or munge_msg, accept_message -; which clears ACK and returns control, or reply_message -; which sends the message pointed to by the DSA -; msgout_other table indirect field. -; -; DISCONNECT messages are handled by moving the command -; to the reconnect_dsa_queue. -#if (CHIP == 710) -; NOTE: DSA should be valid when we get here - we cannot save both it -; and TEMP in this routine. -#endif -; -; INPUTS : DSA - SCSI COMMAND, SFBR - first byte of message (munge_msg -; only) -; -; CALLS : NO. The TEMP register isn't backed up to allow nested calls. -; -; MODIFIES : SCRATCH, DSA on DISCONNECT -; -; EXITS : On receipt of SAVE DATA POINTER, RESTORE POINTERS, -; and normal return from message handlers running under -; Linux, control is returned to the caller. Receipt -; of DISCONNECT messages pass control to dsa_schedule. -; -ENTRY msg_in_restart -msg_in_restart: -; XXX - hackish -; -; Since it's easier to debug changes to the statically -; compiled code, rather than the dynamically generated -; stuff, such as -; -; MOVE x, y, WHEN data_phase -; CALL other_z, WHEN NOT data_phase -; MOVE x, y, WHEN data_phase -; -; I'd like to have certain routines (notably the message handler) -; restart on the conditional call rather than the next instruction. -; -; So, subtract 8 from the return address - - MOVE TEMP0 + 0xf8 TO TEMP0 - MOVE TEMP1 + 0xff TO TEMP1 WITH CARRY - MOVE TEMP2 + 0xff TO TEMP2 WITH CARRY - MOVE TEMP3 + 0xff TO TEMP3 WITH CARRY - -ENTRY msg_in -msg_in: - MOVE 1, msg_buf, WHEN MSG_IN - -munge_msg: - JUMP munge_extended, IF 0x01 ; EXTENDED MESSAGE - JUMP munge_2, IF 0x20, AND MASK 0xdf ; two byte message -; -; XXX - I've seen a handful of broken SCSI devices which fail to issue -; a SAVE POINTERS message before disconnecting in the middle of -; a transfer, assuming that the DATA POINTER will be implicitly -; restored. -; -; Historically, I've often done an implicit save when the DISCONNECT -; message is processed. We may want to consider having the option of -; doing that here. -; - JUMP munge_save_data_pointer, IF 0x02 ; SAVE DATA POINTER - JUMP munge_restore_pointers, IF 0x03 ; RESTORE POINTERS - JUMP munge_disconnect, IF 0x04 ; DISCONNECT - INT int_msg_1, IF 0x07 ; MESSAGE REJECT - INT int_msg_1, IF 0x0f ; INITIATE RECOVERY -#ifdef EVENTS - INT int_EVENT_SELECT_FAILED -#endif - JUMP reject_message - -munge_2: - JUMP reject_message -; -; The SCSI standard allows targets to recover from transient -; error conditions by backing up the data pointer with a -; RESTORE POINTERS message. -; -; So, we must save and restore the _residual_ code as well as -; the current instruction pointer. Because of this messiness, -; it is simpler to put dynamic code in the dsa for this and to -; just do a simple jump down there. -; - -munge_save_data_pointer: -#if (CHIP == 710) - ; We have something in TEMP here, so first we must save that - MOVE TEMP0 TO SFBR - MOVE SFBR TO SCRATCH0 - MOVE TEMP1 TO SFBR - MOVE SFBR TO SCRATCH1 - MOVE TEMP2 TO SFBR - MOVE SFBR TO SCRATCH2 - MOVE TEMP3 TO SFBR - MOVE SFBR TO SCRATCH3 - MOVE MEMORY 4, addr_scratch, jump_temp + 4 - ; Now restore DSA - MOVE MEMORY 4, saved_dsa, addr_dsa -#endif - MOVE DSA0 + dsa_save_data_pointer TO SFBR - MOVE SFBR TO SCRATCH0 - MOVE DSA1 + 0xff TO SFBR WITH CARRY - MOVE SFBR TO SCRATCH1 - MOVE DSA2 + 0xff TO SFBR WITH CARRY - MOVE SFBR TO SCRATCH2 - MOVE DSA3 + 0xff TO SFBR WITH CARRY - MOVE SFBR TO SCRATCH3 - - DMODE_NCR_TO_MEMORY - MOVE MEMORY 4, addr_scratch, jump_dsa_save + 4 - DMODE_MEMORY_TO_MEMORY -jump_dsa_save: - JUMP 0 - -munge_restore_pointers: -#if (CHIP == 710) - ; The code at dsa_restore_pointers will RETURN, but we don't care - ; about TEMP here, as it will overwrite it anyway. -#endif - MOVE DSA0 + dsa_restore_pointers TO SFBR - MOVE SFBR TO SCRATCH0 - MOVE DSA1 + 0xff TO SFBR WITH CARRY - MOVE SFBR TO SCRATCH1 - MOVE DSA2 + 0xff TO SFBR WITH CARRY - MOVE SFBR TO SCRATCH2 - MOVE DSA3 + 0xff TO SFBR WITH CARRY - MOVE SFBR TO SCRATCH3 - - DMODE_NCR_TO_MEMORY - MOVE MEMORY 4, addr_scratch, jump_dsa_restore + 4 - DMODE_MEMORY_TO_MEMORY -jump_dsa_restore: - JUMP 0 - - -munge_disconnect: -#ifdef DEBUG - INT int_debug_disconnect_msg -#endif - -/* - * Before, we overlapped processing with waiting for disconnect, but - * debugging was beginning to appear messy. Temporarily move things - * to just before the WAIT DISCONNECT. - */ - -#ifdef ORIGINAL -#if (CHIP == 710) -; Following clears Unexpected Disconnect bit. What do we do? -#else - MOVE SCNTL2 & 0x7f TO SCNTL2 -#endif - CLEAR ACK -#endif - -#if (CHIP != 700) && (CHIP != 70066) - JUMP dsa_schedule -#else - WAIT DISCONNECT - INT int_norm_disconnected -#endif - -munge_extended: - CLEAR ACK - INT int_err_unexpected_phase, WHEN NOT MSG_IN - MOVE 1, msg_buf + 1, WHEN MSG_IN - JUMP munge_extended_2, IF 0x02 - JUMP munge_extended_3, IF 0x03 - JUMP reject_message - -munge_extended_2: - CLEAR ACK - MOVE 1, msg_buf + 2, WHEN MSG_IN - JUMP reject_message, IF NOT 0x02 ; Must be WDTR - CLEAR ACK - MOVE 1, msg_buf + 3, WHEN MSG_IN - INT int_msg_wdtr - -munge_extended_3: - CLEAR ACK - MOVE 1, msg_buf + 2, WHEN MSG_IN - JUMP reject_message, IF NOT 0x01 ; Must be SDTR - CLEAR ACK - MOVE 2, msg_buf + 3, WHEN MSG_IN - INT int_msg_sdtr - -ENTRY reject_message -reject_message: - SET ATN - CLEAR ACK - MOVE 1, NCR53c7xx_msg_reject, WHEN MSG_OUT - RETURN - -ENTRY accept_message -accept_message: - CLEAR ATN - CLEAR ACK - RETURN - -ENTRY respond_message -respond_message: - SET ATN - CLEAR ACK - MOVE FROM dsa_msgout_other, WHEN MSG_OUT - RETURN - -; -; command_complete -; -; PURPOSE : handle command termination when STATUS IN is detected by reading -; a status byte followed by a command termination message. -; -; Normal termination results in an INTFLY instruction, and -; the host system can pick out which command terminated by -; examining the MESSAGE and STATUS buffers of all currently -; executing commands; -; -; Abnormal (CHECK_CONDITION) termination results in an -; int_err_check_condition interrupt so that a REQUEST SENSE -; command can be issued out-of-order so that no other command -; clears the contingent allegiance condition. -; -; -; INPUTS : DSA - command -; -; CALLS : OK -; -; EXITS : On successful termination, control is passed to schedule. -; On abnormal termination, the user will usually modify the -; DSA fields and corresponding buffers and return control -; to select. -; - -ENTRY command_complete -command_complete: - MOVE FROM dsa_status, WHEN STATUS -#if (CHIP != 700) && (CHIP != 70066) - MOVE SFBR TO SCRATCH0 ; Save status -#endif /* (CHIP != 700) && (CHIP != 70066) */ -ENTRY command_complete_msgin -command_complete_msgin: - MOVE FROM dsa_msgin, WHEN MSG_IN -; Indicate that we should be expecting a disconnect -#if (CHIP != 710) - MOVE SCNTL2 & 0x7f TO SCNTL2 -#else - ; Above code cleared the Unexpected Disconnect bit, what do we do? -#endif - CLEAR ACK -#if (CHIP != 700) && (CHIP != 70066) - WAIT DISCONNECT - -; -; The SCSI specification states that when a UNIT ATTENTION condition -; is pending, as indicated by a CHECK CONDITION status message, -; the target shall revert to asynchronous transfers. Since -; synchronous transfers parameters are maintained on a per INITIATOR/TARGET -; basis, and returning control to our scheduler could work on a command -; running on another lun on that target using the old parameters, we must -; interrupt the host processor to get them changed, or change them ourselves. -; -; Once SCSI-II tagged queueing is implemented, things will be even more -; hairy, since contingent allegiance conditions exist on a per-target/lun -; basis, and issuing a new command with a different tag would clear it. -; In these cases, we must interrupt the host processor to get a request -; added to the HEAD of the queue with the request sense command, or we -; must automatically issue the request sense command. - -#if 0 - MOVE SCRATCH0 TO SFBR - JUMP command_failed, IF 0x02 -#endif -#if (CHIP == 710) -#if defined(MVME16x_INTFLY) -; For MVME16x (ie CHIP=710) we will force an INTFLY by triggering a software -; interrupt (SW7). We can use SCRATCH, as we are about to jump to -; schedule, which corrupts it anyway. Will probably remove this later, -; but want to check performance effects first. - -#define INTFLY_ADDR 0xfff40070 - - MOVE 0 TO SCRATCH0 - MOVE 0x80 TO SCRATCH1 - MOVE 0 TO SCRATCH2 - MOVE 0 TO SCRATCH3 - MOVE MEMORY 4, addr_scratch, INTFLY_ADDR -#else - INT int_norm_emulateintfly -#endif -#else - INTFLY -#endif -#endif /* (CHIP != 700) && (CHIP != 70066) */ -#if (CHIP == 710) - ; Time to correct DSA following memory move - MOVE MEMORY 4, saved_dsa, addr_dsa -#endif -#ifdef EVENTS - INT int_EVENT_COMPLETE -#endif -#if (CHIP != 700) && (CHIP != 70066) - JUMP schedule -command_failed: - INT int_err_check_condition -#else - INT int_norm_command_complete -#endif - -; -; wait_reselect -; -; PURPOSE : This is essentially the idle routine, where control lands -; when there are no new processes to schedule. wait_reselect -; waits for reselection, selection, and new commands. -; -; When a successful reselection occurs, with the aid -; of fixed up code in each DSA, wait_reselect walks the -; reconnect_dsa_queue, asking each dsa if the target ID -; and LUN match its. -; -; If a match is found, a call is made back to reselected_ok, -; which through the miracles of self modifying code, extracts -; the found DSA from the reconnect_dsa_queue and then -; returns control to the DSAs thread of execution. -; -; INPUTS : NONE -; -; CALLS : OK -; -; MODIFIES : DSA, -; -; EXITS : On successful reselection, control is returned to the -; DSA which called reselected_ok. If the WAIT RESELECT -; was interrupted by a new commands arrival signaled by -; SIG_P, control is passed to schedule. If the NCR is -; selected, the host system is interrupted with an -; int_err_selected which is usually responded to by -; setting DSP to the target_abort address. - -ENTRY wait_reselect -wait_reselect: -#ifdef EVENTS - int int_EVENT_IDLE -#endif -#ifdef DEBUG - int int_debug_idle -#endif - WAIT RESELECT wait_reselect_failed - -reselected: -#ifdef EVENTS - int int_EVENT_RESELECT -#endif - CLEAR TARGET - DMODE_MEMORY_TO_MEMORY - ; Read all data needed to reestablish the nexus - - MOVE 1, reselected_identify, WHEN MSG_IN - ; We used to CLEAR ACK here. -#if (CHIP != 700) && (CHIP != 70066) -#ifdef DEBUG - int int_debug_reselected -#endif - - ; Point DSA at the current head of the disconnected queue. - DMODE_MEMORY_TO_NCR - MOVE MEMORY 4, reconnect_dsa_head, addr_scratch - DMODE_MEMORY_TO_MEMORY -#if (CHIP == 710) - MOVE MEMORY 4, addr_scratch, saved_dsa -#else - CALL scratch_to_dsa -#endif - - ; Fix the update-next pointer so that the reconnect_dsa_head - ; pointer is the one that will be updated if this DSA is a hit - ; and we remove it from the queue. - - MOVE MEMORY 4, addr_reconnect_dsa_head, reselected_ok_patch + 8 -#if (CHIP == 710) - ; Time to correct DSA following memory move - MOVE MEMORY 4, saved_dsa, addr_dsa -#endif - -ENTRY reselected_check_next -reselected_check_next: -#ifdef DEBUG - INT int_debug_reselect_check -#endif - ; Check for a NULL pointer. - MOVE DSA0 TO SFBR - JUMP reselected_not_end, IF NOT 0 - MOVE DSA1 TO SFBR - JUMP reselected_not_end, IF NOT 0 - MOVE DSA2 TO SFBR - JUMP reselected_not_end, IF NOT 0 - MOVE DSA3 TO SFBR - JUMP reselected_not_end, IF NOT 0 - INT int_err_unexpected_reselect - -reselected_not_end: - ; - ; XXX the ALU is only eight bits wide, and the assembler - ; wont do the dirt work for us. As long as dsa_check_reselect - ; is negative, we need to sign extend with 1 bits to the full - ; 32 bit width of the address. - ; - ; A potential work around would be to have a known alignment - ; of the DSA structure such that the base address plus - ; dsa_check_reselect doesn't require carrying from bytes - ; higher than the LSB. - ; - - MOVE DSA0 TO SFBR - MOVE SFBR + dsa_check_reselect TO SCRATCH0 - MOVE DSA1 TO SFBR - MOVE SFBR + 0xff TO SCRATCH1 WITH CARRY - MOVE DSA2 TO SFBR - MOVE SFBR + 0xff TO SCRATCH2 WITH CARRY - MOVE DSA3 TO SFBR - MOVE SFBR + 0xff TO SCRATCH3 WITH CARRY - - DMODE_NCR_TO_MEMORY - MOVE MEMORY 4, addr_scratch, reselected_check + 4 - DMODE_MEMORY_TO_MEMORY -#if (CHIP == 710) - ; Time to correct DSA following memory move - MOVE MEMORY 4, saved_dsa, addr_dsa -#endif -reselected_check: - JUMP 0 - - -; -; -#if (CHIP == 710) -; We have problems here - the memory move corrupts TEMP and DSA. This -; routine is called from DSA code, and patched from many places. Scratch -; is probably free when it is called. -; We have to: -; copy temp to scratch, one byte at a time -; write scratch to patch a jump in place of the return -; do the move memory -; jump to the patched in return address -; DSA is corrupt when we get here, and can be left corrupt - -ENTRY reselected_ok -reselected_ok: - MOVE TEMP0 TO SFBR - MOVE SFBR TO SCRATCH0 - MOVE TEMP1 TO SFBR - MOVE SFBR TO SCRATCH1 - MOVE TEMP2 TO SFBR - MOVE SFBR TO SCRATCH2 - MOVE TEMP3 TO SFBR - MOVE SFBR TO SCRATCH3 - MOVE MEMORY 4, addr_scratch, reselected_ok_jump + 4 -reselected_ok_patch: - MOVE MEMORY 4, 0, 0 -reselected_ok_jump: - JUMP 0 -#else -ENTRY reselected_ok -reselected_ok: -reselected_ok_patch: - MOVE MEMORY 4, 0, 0 ; Patched : first word - ; is address of - ; successful dsa_next - ; Second word is last - ; unsuccessful dsa_next, - ; starting with - ; dsa_reconnect_head - ; We used to CLEAR ACK here. -#ifdef DEBUG - INT int_debug_reselected_ok -#endif -#ifdef DEBUG - INT int_debug_check_dsa -#endif - RETURN ; Return control to where -#endif -#else - INT int_norm_reselected -#endif /* (CHIP != 700) && (CHIP != 70066) */ - -selected: - INT int_err_selected; - -; -; A select or reselect failure can be caused by one of two conditions : -; 1. SIG_P was set. This will be the case if the user has written -; a new value to a previously NULL head of the issue queue. -; -; 2. The NCR53c810 was selected or reselected by another device. -; -; 3. The bus was already busy since we were selected or reselected -; before starting the command. - -wait_reselect_failed: -#ifdef EVENTS - INT int_EVENT_RESELECT_FAILED -#endif -; Check selected bit. -#if (CHIP == 710) - ; Must work out how to tell if we are selected.... -#else - MOVE SIST0 & 0x20 TO SFBR - JUMP selected, IF 0x20 -#endif -; Reading CTEST2 clears the SIG_P bit in the ISTAT register. - MOVE CTEST2 & 0x40 TO SFBR - JUMP schedule, IF 0x40 -; Check connected bit. -; FIXME: this needs to change if we support target mode - MOVE ISTAT & 0x08 TO SFBR - JUMP reselected, IF 0x08 -; FIXME : Something bogus happened, and we shouldn't fail silently. -#if 0 - JUMP schedule -#else - INT int_debug_panic -#endif - - -select_failed: -#if (CHIP == 710) - ; Disable selection timer - MOVE CTEST7 | 0x10 TO CTEST7 -#endif -#ifdef EVENTS - int int_EVENT_SELECT_FAILED -#endif -; Otherwise, mask the selected and reselected bits off SIST0 -#if (CHIP ==710) - ; Let's assume we don't get selected for now - MOVE SSTAT0 & 0x10 TO SFBR -#else - MOVE SIST0 & 0x30 TO SFBR - JUMP selected, IF 0x20 -#endif - JUMP reselected, IF 0x10 -; If SIGP is set, the user just gave us another command, and -; we should restart or return to the scheduler. -; Reading CTEST2 clears the SIG_P bit in the ISTAT register. - MOVE CTEST2 & 0x40 TO SFBR - JUMP select, IF 0x40 -; Check connected bit. -; FIXME: this needs to change if we support target mode -; FIXME: is this really necessary? - MOVE ISTAT & 0x08 TO SFBR - JUMP reselected, IF 0x08 -; FIXME : Something bogus happened, and we shouldn't fail silently. -#if 0 - JUMP schedule -#else - INT int_debug_panic -#endif - -; -; test_1 -; test_2 -; -; PURPOSE : run some verification tests on the NCR. test_1 -; copies test_src to test_dest and interrupts the host -; processor, testing for cache coherency and interrupt -; problems in the processes. -; -; test_2 runs a command with offsets relative to the -; DSA on entry, and is useful for miscellaneous experimentation. -; - -; Verify that interrupts are working correctly and that we don't -; have a cache invalidation problem. - -ABSOLUTE test_src = 0, test_dest = 0 -ENTRY test_1 -test_1: - MOVE MEMORY 4, test_src, test_dest - INT int_test_1 - -; -; Run arbitrary commands, with test code establishing a DSA -; - -ENTRY test_2 -test_2: - CLEAR TARGET -#if (CHIP == 710) - ; Enable selection timer -#ifdef NO_SELECTION_TIMEOUT - MOVE CTEST7 & 0xff TO CTEST7 -#else - MOVE CTEST7 & 0xef TO CTEST7 -#endif -#endif - SELECT ATN FROM 0, test_2_fail - JUMP test_2_msgout, WHEN MSG_OUT -ENTRY test_2_msgout -test_2_msgout: -#if (CHIP == 710) - ; Disable selection timer - MOVE CTEST7 | 0x10 TO CTEST7 -#endif - MOVE FROM 8, WHEN MSG_OUT - MOVE FROM 16, WHEN CMD - MOVE FROM 24, WHEN DATA_IN - MOVE FROM 32, WHEN STATUS - MOVE FROM 40, WHEN MSG_IN -#if (CHIP != 710) - MOVE SCNTL2 & 0x7f TO SCNTL2 -#endif - CLEAR ACK - WAIT DISCONNECT -test_2_fail: -#if (CHIP == 710) - ; Disable selection timer - MOVE CTEST7 | 0x10 TO CTEST7 -#endif - INT int_test_2 - -ENTRY debug_break -debug_break: - INT int_debug_break - -; -; initiator_abort -; target_abort -; -; PURPOSE : Abort the currently established nexus from with initiator -; or target mode. -; -; - -ENTRY target_abort -target_abort: - SET TARGET - DISCONNECT - CLEAR TARGET - JUMP schedule - -ENTRY initiator_abort -initiator_abort: - SET ATN -; -; The SCSI-I specification says that targets may go into MSG out at -; their leisure upon receipt of the ATN single. On all versions of the -; specification, we can't change phases until REQ transitions true->false, -; so we need to sink/source one byte of data to allow the transition. -; -; For the sake of safety, we'll only source one byte of data in all -; cases, but to accommodate the SCSI-I dain bramage, we'll sink an -; arbitrary number of bytes. - JUMP spew_cmd, WHEN CMD - JUMP eat_msgin, WHEN MSG_IN - JUMP eat_datain, WHEN DATA_IN - JUMP eat_status, WHEN STATUS - JUMP spew_dataout, WHEN DATA_OUT - JUMP sated -spew_cmd: - MOVE 1, NCR53c7xx_zero, WHEN CMD - JUMP sated -eat_msgin: - MOVE 1, NCR53c7xx_sink, WHEN MSG_IN - JUMP eat_msgin, WHEN MSG_IN - JUMP sated -eat_status: - MOVE 1, NCR53c7xx_sink, WHEN STATUS - JUMP eat_status, WHEN STATUS - JUMP sated -eat_datain: - MOVE 1, NCR53c7xx_sink, WHEN DATA_IN - JUMP eat_datain, WHEN DATA_IN - JUMP sated -spew_dataout: - MOVE 1, NCR53c7xx_zero, WHEN DATA_OUT -sated: -#if (CHIP != 710) - MOVE SCNTL2 & 0x7f TO SCNTL2 -#endif - MOVE 1, NCR53c7xx_msg_abort, WHEN MSG_OUT - WAIT DISCONNECT - INT int_norm_aborted - -#if (CHIP != 710) -; -; dsa_to_scratch -; scratch_to_dsa -; -; PURPOSE : -; The NCR chips cannot do a move memory instruction with the DSA register -; as the source or destination. So, we provide a couple of subroutines -; that let us switch between the DSA register and scratch register. -; -; Memory moves to/from the DSPS register also don't work, but we -; don't use them. -; -; - - -dsa_to_scratch: - MOVE DSA0 TO SFBR - MOVE SFBR TO SCRATCH0 - MOVE DSA1 TO SFBR - MOVE SFBR TO SCRATCH1 - MOVE DSA2 TO SFBR - MOVE SFBR TO SCRATCH2 - MOVE DSA3 TO SFBR - MOVE SFBR TO SCRATCH3 - RETURN - -scratch_to_dsa: - MOVE SCRATCH0 TO SFBR - MOVE SFBR TO DSA0 - MOVE SCRATCH1 TO SFBR - MOVE SFBR TO DSA1 - MOVE SCRATCH2 TO SFBR - MOVE SFBR TO DSA2 - MOVE SCRATCH3 TO SFBR - MOVE SFBR TO DSA3 - RETURN -#endif - -#if (CHIP == 710) -; Little patched jump, used to overcome problems with TEMP getting -; corrupted on memory moves. - -jump_temp: - JUMP 0 -#endif diff --git a/drivers/scsi/53c7xx_d.h_shipped b/drivers/scsi/53c7xx_d.h_shipped deleted file mode 100644 index 21d31b08ec3..00000000000 --- a/drivers/scsi/53c7xx_d.h_shipped +++ /dev/null @@ -1,2874 +0,0 @@ -/* DO NOT EDIT - Generated automatically by script_asm.pl */ -static u32 SCRIPT[] = { -/* - - - - - -; 53c710 driver. Modified from Drew Eckhardts driver -; for 53c810 by Richard Hirst [richard@sleepie.demon.co.uk] -; -; I have left the script for the 53c8xx family in here, as it is likely -; to be useful to see what I changed when bug hunting. - -; NCR 53c810 driver, main script -; Sponsored by -; iX Multiuser Multitasking Magazine -; hm@ix.de -; -; Copyright 1993, 1994, 1995 Drew Eckhardt -; Visionary Computing -; (Unix and Linux consulting and custom programming) -; drew@PoohSticks.ORG -; +1 (303) 786-7975 -; -; TolerANT and SCSI SCRIPTS are registered trademarks of NCR Corporation. -; -; PRE-ALPHA -; -; For more information, please consult -; -; NCR 53C810 -; PCI-SCSI I/O Processor -; Data Manual -; -; NCR 53C710 -; SCSI I/O Processor -; Programmers Guide -; -; NCR Microelectronics -; 1635 Aeroplaza Drive -; Colorado Springs, CO 80916 -; 1+ (719) 578-3400 -; -; Toll free literature number -; +1 (800) 334-5454 -; -; IMPORTANT : This code is self modifying due to the limitations of -; the NCR53c7,8xx series chips. Persons debugging this code with -; the remote debugger should take this into account, and NOT set -; breakpoints in modified instructions. -; -; Design: -; The NCR53c7,8xx family of SCSI chips are busmasters with an onboard -; microcontroller using a simple instruction set. -; -; So, to minimize the effects of interrupt latency, and to maximize -; throughput, this driver offloads the practical maximum amount -; of processing to the SCSI chip while still maintaining a common -; structure. -; -; Where tradeoffs were needed between efficiency on the older -; chips and the newer NCR53c800 series, the NCR53c800 series -; was chosen. -; -; While the NCR53c700 and NCR53c700-66 lacked the facilities to fully -; automate SCSI transfers without host processor intervention, this -; isn't the case with the NCR53c710 and newer chips which allow -; -; - reads and writes to the internal registers from within the SCSI -; scripts, allowing the SCSI SCRIPTS(tm) code to save processor -; state so that multiple threads of execution are possible, and also -; provide an ALU for loop control, etc. -; -; - table indirect addressing for some instructions. This allows -; pointers to be located relative to the DSA ((Data Structure -; Address) register. -; -; These features make it possible to implement a mailbox style interface, -; where the same piece of code is run to handle I/O for multiple threads -; at once minimizing our need to relocate code. Since the NCR53c700/ -; NCR53c800 series have a unique combination of features, making a -; a standard ingoing/outgoing mailbox system, costly, I've modified it. -; -; - Mailboxes are a mixture of code and data. This lets us greatly -; simplify the NCR53c810 code and do things that would otherwise -; not be possible. -; -; The saved data pointer is now implemented as follows : -; -; Control flow has been architected such that if control reaches -; munge_save_data_pointer, on a restore pointers message or -; reconnection, a jump to the address formerly in the TEMP register -; will allow the SCSI command to resume execution. -; - -; -; Note : the DSA structures must be aligned on 32 bit boundaries, -; since the source and destination of MOVE MEMORY instructions -; must share the same alignment and this is the alignment of the -; NCR registers. -; - -; For some systems (MVME166, for example) dmode is always the same, so don't -; waste time writing it - - - - - - - - - - - -ABSOLUTE dsa_temp_lun = 0 ; Patch to lun for current dsa -ABSOLUTE dsa_temp_next = 0 ; Patch to dsa next for current dsa -ABSOLUTE dsa_temp_addr_next = 0 ; Patch to address of dsa next address - ; for current dsa -ABSOLUTE dsa_temp_sync = 0 ; Patch to address of per-target - ; sync routine -ABSOLUTE dsa_sscf_710 = 0 ; Patch to address of per-target - ; sscf value (53c710) -ABSOLUTE dsa_temp_target = 0 ; Patch to id for current dsa -ABSOLUTE dsa_temp_addr_saved_pointer = 0; Patch to address of per-command - ; saved data pointer -ABSOLUTE dsa_temp_addr_residual = 0 ; Patch to address of per-command - ; current residual code -ABSOLUTE dsa_temp_addr_saved_residual = 0; Patch to address of per-command - ; saved residual code -ABSOLUTE dsa_temp_addr_new_value = 0 ; Address of value for JUMP operand -ABSOLUTE dsa_temp_addr_array_value = 0 ; Address to copy to -ABSOLUTE dsa_temp_addr_dsa_value = 0 ; Address of this DSA value - -; -; Once a device has initiated reselection, we need to compare it -; against the singly linked list of commands which have disconnected -; and are pending reselection. These commands are maintained in -; an unordered singly linked list of DSA structures, through the -; DSA pointers at their 'centers' headed by the reconnect_dsa_head -; pointer. -; -; To avoid complications in removing commands from the list, -; I minimize the amount of expensive (at eight operations per -; addition @ 500-600ns each) pointer operations which must -; be done in the NCR driver by precomputing them on the -; host processor during dsa structure generation. -; -; The fixed-up per DSA code knows how to recognize the nexus -; associated with the corresponding SCSI command, and modifies -; the source and destination pointers for the MOVE MEMORY -; instruction which is executed when reselected_ok is called -; to remove the command from the list. Similarly, DSA is -; loaded with the address of the next DSA structure and -; reselected_check_next is called if a failure occurs. -; -; Perhaps more concisely, the net effect of the mess is -; -; for (dsa = reconnect_dsa_head, dest = &reconnect_dsa_head, -; src = NULL; dsa; dest = &dsa->next, dsa = dsa->next) { -; src = &dsa->next; -; if (target_id == dsa->id && target_lun == dsa->lun) { -; *dest = *src; -; break; -; } -; } -; -; if (!dsa) -; error (int_err_unexpected_reselect); -; else -; longjmp (dsa->jump_resume, 0); -; -; - - -; Define DSA structure used for mailboxes -ENTRY dsa_code_template -dsa_code_template: -ENTRY dsa_code_begin -dsa_code_begin: -; RGH: Don't care about TEMP and DSA here - - MOVE MEMORY 4, dsa_temp_addr_dsa_value, addr_scratch - -at 0x00000000 : */ 0xc0000004,0x00000000,0x00000000, -/* - - - MOVE MEMORY 4, addr_scratch, saved_dsa - -at 0x00000003 : */ 0xc0000004,0x00000000,0x00000000, -/* - ; We are about to go and select the device, so must set SSCF bits - MOVE MEMORY 4, dsa_sscf_710, addr_scratch - -at 0x00000006 : */ 0xc0000004,0x00000000,0x00000000, -/* - - MOVE SCRATCH3 TO SFBR - -at 0x00000009 : */ 0x72370000,0x00000000, -/* - - - - MOVE SFBR TO SBCL - -at 0x0000000b : */ 0x6a0b0000,0x00000000, -/* - MOVE MEMORY 4, saved_dsa, addr_dsa - -at 0x0000000d : */ 0xc0000004,0x00000000,0x00000000, -/* - - - - CALL select - -at 0x00000010 : */ 0x88080000,0x000001f8, -/* -; Handle the phase mismatch which may have resulted from the -; MOVE FROM dsa_msgout if we returned here. The CLEAR ATN -; may or may not be necessary, and we should update script_asm.pl -; to handle multiple pieces. - CLEAR ATN - -at 0x00000012 : */ 0x60000008,0x00000000, -/* - CLEAR ACK - -at 0x00000014 : */ 0x60000040,0x00000000, -/* - -; Replace second operand with address of JUMP instruction dest operand -; in schedule table for this DSA. Becomes dsa_jump_dest in 53c7,8xx.c. -ENTRY dsa_code_fix_jump -dsa_code_fix_jump: - MOVE MEMORY 4, NOP_insn, 0 - -at 0x00000016 : */ 0xc0000004,0x00000000,0x00000000, -/* - JUMP select_done - -at 0x00000019 : */ 0x80080000,0x00000230, -/* - -; wrong_dsa loads the DSA register with the value of the dsa_next -; field. -; -wrong_dsa: - -; NOTE DSA is corrupt when we arrive here! - -; Patch the MOVE MEMORY INSTRUCTION such that -; the destination address is the address of the OLD -; next pointer. -; - MOVE MEMORY 4, dsa_temp_addr_next, reselected_ok_patch + 8 - -at 0x0000001b : */ 0xc0000004,0x00000000,0x000007ec, -/* - -; -; Move the _contents_ of the next pointer into the DSA register as -; the next I_T_L or I_T_L_Q tupple to check against the established -; nexus. -; - MOVE MEMORY 4, dsa_temp_next, addr_scratch - -at 0x0000001e : */ 0xc0000004,0x00000000,0x00000000, -/* - - - MOVE MEMORY 4, addr_scratch, saved_dsa - -at 0x00000021 : */ 0xc0000004,0x00000000,0x00000000, -/* - MOVE MEMORY 4, saved_dsa, addr_dsa - -at 0x00000024 : */ 0xc0000004,0x00000000,0x00000000, -/* - - - - JUMP reselected_check_next - -at 0x00000027 : */ 0x80080000,0x000006f0, -/* - -ABSOLUTE dsa_save_data_pointer = 0 -ENTRY dsa_code_save_data_pointer -dsa_code_save_data_pointer: - - ; When we get here, TEMP has been saved in jump_temp+4, DSA is corrupt - ; We MUST return with DSA correct - MOVE MEMORY 4, jump_temp+4, dsa_temp_addr_saved_pointer - -at 0x00000029 : */ 0xc0000004,0x000009c8,0x00000000, -/* -; HARD CODED : 24 bytes needs to agree with 53c7,8xx.h - MOVE MEMORY 24, dsa_temp_addr_residual, dsa_temp_addr_saved_residual - -at 0x0000002c : */ 0xc0000018,0x00000000,0x00000000, -/* - CLEAR ACK - -at 0x0000002f : */ 0x60000040,0x00000000, -/* - - - - MOVE MEMORY 4, saved_dsa, addr_dsa - -at 0x00000031 : */ 0xc0000004,0x00000000,0x00000000, -/* - JUMP jump_temp - -at 0x00000034 : */ 0x80080000,0x000009c4, -/* - -ABSOLUTE dsa_restore_pointers = 0 -ENTRY dsa_code_restore_pointers -dsa_code_restore_pointers: - - ; TEMP and DSA are corrupt when we get here, but who cares! - MOVE MEMORY 4, dsa_temp_addr_saved_pointer, jump_temp + 4 - -at 0x00000036 : */ 0xc0000004,0x00000000,0x000009c8, -/* -; HARD CODED : 24 bytes needs to agree with 53c7,8xx.h - MOVE MEMORY 24, dsa_temp_addr_saved_residual, dsa_temp_addr_residual - -at 0x00000039 : */ 0xc0000018,0x00000000,0x00000000, -/* - CLEAR ACK - -at 0x0000003c : */ 0x60000040,0x00000000, -/* - ; Restore DSA, note we don't care about TEMP - MOVE MEMORY 4, saved_dsa, addr_dsa - -at 0x0000003e : */ 0xc0000004,0x00000000,0x00000000, -/* - - - - JUMP jump_temp - -at 0x00000041 : */ 0x80080000,0x000009c4, -/* - - -ABSOLUTE dsa_check_reselect = 0 -; dsa_check_reselect determines whether or not the current target and -; lun match the current DSA -ENTRY dsa_code_check_reselect -dsa_code_check_reselect: - - - - MOVE LCRC TO SFBR ; LCRC has our ID and his ID bits set - -at 0x00000043 : */ 0x72230000,0x00000000, -/* - JUMP REL (wrong_dsa), IF NOT dsa_temp_target, AND MASK 0x80 - -at 0x00000045 : */ 0x80848000,0x00ffff50, -/* - - - - - -; -; Hack - move to scratch first, since SFBR is not writeable -; via the CPU and hence a MOVE MEMORY instruction. -; - - MOVE MEMORY 1, reselected_identify, addr_scratch - -at 0x00000047 : */ 0xc0000001,0x00000000,0x00000000, -/* - - - ; BIG ENDIAN ON MVME16x - MOVE SCRATCH3 TO SFBR - -at 0x0000004a : */ 0x72370000,0x00000000, -/* - - - -; FIXME : we need to accommodate bit fielded and binary here for '7xx/'8xx chips -; Are you sure about that? richard@sleepie.demon.co.uk - JUMP REL (wrong_dsa), IF NOT dsa_temp_lun, AND MASK 0xf8 - -at 0x0000004c : */ 0x8084f800,0x00ffff34, -/* -; Patch the MOVE MEMORY INSTRUCTION such that -; the source address is the address of this dsa's -; next pointer. - MOVE MEMORY 4, dsa_temp_addr_next, reselected_ok_patch + 4 - -at 0x0000004e : */ 0xc0000004,0x00000000,0x000007e8, -/* - CALL reselected_ok - -at 0x00000051 : */ 0x88080000,0x00000798, -/* - -; Restore DSA following memory moves in reselected_ok -; dsa_temp_sync doesn't really care about DSA, but it has an -; optional debug INT so a valid DSA is a good idea. - MOVE MEMORY 4, saved_dsa, addr_dsa - -at 0x00000053 : */ 0xc0000004,0x00000000,0x00000000, -/* - - CALL dsa_temp_sync - -at 0x00000056 : */ 0x88080000,0x00000000, -/* -; Release ACK on the IDENTIFY message _after_ we've set the synchronous -; transfer parameters! - CLEAR ACK - -at 0x00000058 : */ 0x60000040,0x00000000, -/* -; Implicitly restore pointers on reselection, so a RETURN -; will transfer control back to the right spot. - CALL REL (dsa_code_restore_pointers) - -at 0x0000005a : */ 0x88880000,0x00ffff68, -/* - RETURN - -at 0x0000005c : */ 0x90080000,0x00000000, -/* -ENTRY dsa_zero -dsa_zero: -ENTRY dsa_code_template_end -dsa_code_template_end: - -; Perform sanity check for dsa_fields_start == dsa_code_template_end - -; dsa_zero, puke. - -ABSOLUTE dsa_fields_start = 0 ; Sanity marker - ; pad 48 bytes (fix this RSN) -ABSOLUTE dsa_next = 48 ; len 4 Next DSA - ; del 4 Previous DSA address -ABSOLUTE dsa_cmnd = 56 ; len 4 Scsi_Cmnd * for this thread. -ABSOLUTE dsa_select = 60 ; len 4 Device ID, Period, Offset for - ; table indirect select -ABSOLUTE dsa_msgout = 64 ; len 8 table indirect move parameter for - ; select message -ABSOLUTE dsa_cmdout = 72 ; len 8 table indirect move parameter for - ; command -ABSOLUTE dsa_dataout = 80 ; len 4 code pointer for dataout -ABSOLUTE dsa_datain = 84 ; len 4 code pointer for datain -ABSOLUTE dsa_msgin = 88 ; len 8 table indirect move for msgin -ABSOLUTE dsa_status = 96 ; len 8 table indirect move for status byte -ABSOLUTE dsa_msgout_other = 104 ; len 8 table indirect for normal message out - ; (Synchronous transfer negotiation, etc). -ABSOLUTE dsa_end = 112 - -ABSOLUTE schedule = 0 ; Array of JUMP dsa_begin or JUMP (next), - ; terminated by a call to JUMP wait_reselect - -; Linked lists of DSA structures -ABSOLUTE reconnect_dsa_head = 0 ; Link list of DSAs which can reconnect -ABSOLUTE addr_reconnect_dsa_head = 0 ; Address of variable containing - ; address of reconnect_dsa_head - -; These select the source and destination of a MOVE MEMORY instruction -ABSOLUTE dmode_memory_to_memory = 0x0 -ABSOLUTE dmode_memory_to_ncr = 0x0 -ABSOLUTE dmode_ncr_to_memory = 0x0 - -ABSOLUTE addr_scratch = 0x0 -ABSOLUTE addr_temp = 0x0 - -ABSOLUTE saved_dsa = 0x0 -ABSOLUTE emulfly = 0x0 -ABSOLUTE addr_dsa = 0x0 - - - -; Interrupts - -; MSB indicates type -; 0 handle error condition -; 1 handle message -; 2 handle normal condition -; 3 debugging interrupt -; 4 testing interrupt -; Next byte indicates specific error - -; XXX not yet implemented, I'm not sure if I want to - -; Next byte indicates the routine the error occurred in -; The LSB indicates the specific place the error occurred - -ABSOLUTE int_err_unexpected_phase = 0x00000000 ; Unexpected phase encountered -ABSOLUTE int_err_selected = 0x00010000 ; SELECTED (nee RESELECTED) -ABSOLUTE int_err_unexpected_reselect = 0x00020000 -ABSOLUTE int_err_check_condition = 0x00030000 -ABSOLUTE int_err_no_phase = 0x00040000 -ABSOLUTE int_msg_wdtr = 0x01000000 ; WDTR message received -ABSOLUTE int_msg_sdtr = 0x01010000 ; SDTR received -ABSOLUTE int_msg_1 = 0x01020000 ; single byte special message - ; received - -ABSOLUTE int_norm_select_complete = 0x02000000 ; Select complete, reprogram - ; registers. -ABSOLUTE int_norm_reselect_complete = 0x02010000 ; Nexus established -ABSOLUTE int_norm_command_complete = 0x02020000 ; Command complete -ABSOLUTE int_norm_disconnected = 0x02030000 ; Disconnected -ABSOLUTE int_norm_aborted =0x02040000 ; Aborted *dsa -ABSOLUTE int_norm_reset = 0x02050000 ; Generated BUS reset. -ABSOLUTE int_norm_emulateintfly = 0x02060000 ; 53C710 Emulated intfly -ABSOLUTE int_debug_break = 0x03000000 ; Break point - -ABSOLUTE int_debug_panic = 0x030b0000 ; Panic driver - - -ABSOLUTE int_test_1 = 0x04000000 ; Test 1 complete -ABSOLUTE int_test_2 = 0x04010000 ; Test 2 complete -ABSOLUTE int_test_3 = 0x04020000 ; Test 3 complete - - -; These should start with 0x05000000, with low bits incrementing for -; each one. - - - -ABSOLUTE NCR53c7xx_msg_abort = 0 ; Pointer to abort message -ABSOLUTE NCR53c7xx_msg_reject = 0 ; Pointer to reject message -ABSOLUTE NCR53c7xx_zero = 0 ; long with zero in it, use for source -ABSOLUTE NCR53c7xx_sink = 0 ; long to dump worthless data in -ABSOLUTE NOP_insn = 0 ; NOP instruction - -; Pointer to message, potentially multi-byte -ABSOLUTE msg_buf = 0 - -; Pointer to holding area for reselection information -ABSOLUTE reselected_identify = 0 -ABSOLUTE reselected_tag = 0 - -; Request sense command pointer, it's a 6 byte command, should -; be constant for all commands since we always want 16 bytes of -; sense and we don't need to change any fields as we did under -; SCSI-I when we actually cared about the LUN field. -;EXTERNAL NCR53c7xx_sense ; Request sense command - - -; dsa_schedule -; PURPOSE : after a DISCONNECT message has been received, and pointers -; saved, insert the current DSA structure at the head of the -; disconnected queue and fall through to the scheduler. -; -; CALLS : OK -; -; INPUTS : dsa - current DSA structure, reconnect_dsa_head - list -; of disconnected commands -; -; MODIFIES : SCRATCH, reconnect_dsa_head -; -; EXITS : always passes control to schedule - -ENTRY dsa_schedule -dsa_schedule: - - - - -; -; Calculate the address of the next pointer within the DSA -; structure of the command that is currently disconnecting -; - - ; Read what should be the current DSA from memory - actual DSA - ; register is probably corrupt - MOVE MEMORY 4, saved_dsa, addr_scratch - -at 0x0000005e : */ 0xc0000004,0x00000000,0x00000000, -/* - - - - MOVE SCRATCH0 + dsa_next TO SCRATCH0 - -at 0x00000061 : */ 0x7e343000,0x00000000, -/* - MOVE SCRATCH1 + 0 TO SCRATCH1 WITH CARRY - -at 0x00000063 : */ 0x7f350000,0x00000000, -/* - MOVE SCRATCH2 + 0 TO SCRATCH2 WITH CARRY - -at 0x00000065 : */ 0x7f360000,0x00000000, -/* - MOVE SCRATCH3 + 0 TO SCRATCH3 WITH CARRY - -at 0x00000067 : */ 0x7f370000,0x00000000, -/* - -; Point the next field of this DSA structure at the current disconnected -; list - - MOVE MEMORY 4, addr_scratch, dsa_schedule_insert + 8 - -at 0x00000069 : */ 0xc0000004,0x00000000,0x000001b8, -/* - -dsa_schedule_insert: - MOVE MEMORY 4, reconnect_dsa_head, 0 - -at 0x0000006c : */ 0xc0000004,0x00000000,0x00000000, -/* - -; And update the head pointer. - - ; Read what should be the current DSA from memory - actual DSA - ; register is probably corrupt - MOVE MEMORY 4, saved_dsa, addr_scratch - -at 0x0000006f : */ 0xc0000004,0x00000000,0x00000000, -/* - - - - - MOVE MEMORY 4, addr_scratch, reconnect_dsa_head - -at 0x00000072 : */ 0xc0000004,0x00000000,0x00000000, -/* - - - - - - - CLEAR ACK - -at 0x00000075 : */ 0x60000040,0x00000000, -/* - - - ; Time to correct DSA following memory move - MOVE MEMORY 4, saved_dsa, addr_dsa - -at 0x00000077 : */ 0xc0000004,0x00000000,0x00000000, -/* - - WAIT DISCONNECT - -at 0x0000007a : */ 0x48000000,0x00000000, -/* - - - - - - - JUMP schedule - -at 0x0000007c : */ 0x80080000,0x00000000, -/* - - -; -; select -; -; PURPOSE : establish a nexus for the SCSI command referenced by DSA. -; On success, the current DSA structure is removed from the issue -; queue. Usually, this is entered as a fall-through from schedule, -; although the contingent allegiance handling code will write -; the select entry address to the DSP to restart a command as a -; REQUEST SENSE. A message is sent (usually IDENTIFY, although -; additional SDTR or WDTR messages may be sent). COMMAND OUT -; is handled. -; -; INPUTS : DSA - SCSI command, issue_dsa_head -; -; CALLS : NOT OK -; -; MODIFIES : SCRATCH, issue_dsa_head -; -; EXITS : on reselection or selection, go to select_failed -; otherwise, RETURN so control is passed back to -; dsa_begin. -; - -ENTRY select -select: - - - - - - - - - CLEAR TARGET - -at 0x0000007e : */ 0x60000200,0x00000000, -/* - -; XXX -; -; In effect, SELECTION operations are backgrounded, with execution -; continuing until code which waits for REQ or a fatal interrupt is -; encountered. -; -; So, for more performance, we could overlap the code which removes -; the command from the NCRs issue queue with the selection, but -; at this point I don't want to deal with the error recovery. -; - - - - ; Enable selection timer - - - - MOVE CTEST7 & 0xef TO CTEST7 - -at 0x00000080 : */ 0x7c1bef00,0x00000000, -/* - - - SELECT ATN FROM dsa_select, select_failed - -at 0x00000082 : */ 0x4300003c,0x00000828, -/* - JUMP select_msgout, WHEN MSG_OUT - -at 0x00000084 : */ 0x860b0000,0x00000218, -/* -ENTRY select_msgout -select_msgout: - - ; Disable selection timer - MOVE CTEST7 | 0x10 TO CTEST7 - -at 0x00000086 : */ 0x7a1b1000,0x00000000, -/* - - MOVE FROM dsa_msgout, WHEN MSG_OUT - -at 0x00000088 : */ 0x1e000000,0x00000040, -/* - - - - - - - - - - - RETURN - -at 0x0000008a : */ 0x90080000,0x00000000, -/* - -; -; select_done -; -; PURPOSE: continue on to normal data transfer; called as the exit -; point from dsa_begin. -; -; INPUTS: dsa -; -; CALLS: OK -; -; - -select_done: - -; NOTE DSA is corrupt when we arrive here! - MOVE MEMORY 4, saved_dsa, addr_dsa - -at 0x0000008c : */ 0xc0000004,0x00000000,0x00000000, -/* - - - - - - - - -; After a successful selection, we should get either a CMD phase or -; some transfer request negotiation message. - - JUMP cmdout, WHEN CMD - -at 0x0000008f : */ 0x820b0000,0x0000025c, -/* - INT int_err_unexpected_phase, WHEN NOT MSG_IN - -at 0x00000091 : */ 0x9f030000,0x00000000, -/* - -select_msg_in: - CALL msg_in, WHEN MSG_IN - -at 0x00000093 : */ 0x8f0b0000,0x0000041c, -/* - JUMP select_msg_in, WHEN MSG_IN - -at 0x00000095 : */ 0x870b0000,0x0000024c, -/* - -cmdout: - INT int_err_unexpected_phase, WHEN NOT CMD - -at 0x00000097 : */ 0x9a030000,0x00000000, -/* - - - -ENTRY cmdout_cmdout -cmdout_cmdout: - - MOVE FROM dsa_cmdout, WHEN CMD - -at 0x00000099 : */ 0x1a000000,0x00000048, -/* - - - - -; -; data_transfer -; other_out -; other_in -; other_transfer -; -; PURPOSE : handle the main data transfer for a SCSI command in -; several parts. In the first part, data_transfer, DATA_IN -; and DATA_OUT phases are allowed, with the user provided -; code (usually dynamically generated based on the scatter/gather -; list associated with a SCSI command) called to handle these -; phases. -; -; After control has passed to one of the user provided -; DATA_IN or DATA_OUT routines, back calls are made to -; other_transfer_in or other_transfer_out to handle non-DATA IN -; and DATA OUT phases respectively, with the state of the active -; data pointer being preserved in TEMP. -; -; On completion, the user code passes control to other_transfer -; which causes DATA_IN and DATA_OUT to result in unexpected_phase -; interrupts so that data overruns may be trapped. -; -; INPUTS : DSA - SCSI command -; -; CALLS : OK in data_transfer_start, not ok in other_out and other_in, ok in -; other_transfer -; -; MODIFIES : SCRATCH -; -; EXITS : if STATUS IN is detected, signifying command completion, -; the NCR jumps to command_complete. If MSG IN occurs, a -; CALL is made to msg_in. Otherwise, other_transfer runs in -; an infinite loop. -; - -ENTRY data_transfer -data_transfer: - JUMP cmdout_cmdout, WHEN CMD - -at 0x0000009b : */ 0x820b0000,0x00000264, -/* - CALL msg_in, WHEN MSG_IN - -at 0x0000009d : */ 0x8f0b0000,0x0000041c, -/* - INT int_err_unexpected_phase, WHEN MSG_OUT - -at 0x0000009f : */ 0x9e0b0000,0x00000000, -/* - JUMP do_dataout, WHEN DATA_OUT - -at 0x000000a1 : */ 0x800b0000,0x000002a4, -/* - JUMP do_datain, WHEN DATA_IN - -at 0x000000a3 : */ 0x810b0000,0x000002fc, -/* - JUMP command_complete, WHEN STATUS - -at 0x000000a5 : */ 0x830b0000,0x0000065c, -/* - JUMP data_transfer - -at 0x000000a7 : */ 0x80080000,0x0000026c, -/* -ENTRY end_data_transfer -end_data_transfer: - -; -; FIXME: On NCR53c700 and NCR53c700-66 chips, do_dataout/do_datain -; should be fixed up whenever the nexus changes so it can point to the -; correct routine for that command. -; - - -; Nasty jump to dsa->dataout -do_dataout: - - MOVE MEMORY 4, saved_dsa, addr_scratch - -at 0x000000a9 : */ 0xc0000004,0x00000000,0x00000000, -/* - - - - MOVE SCRATCH0 + dsa_dataout TO SCRATCH0 - -at 0x000000ac : */ 0x7e345000,0x00000000, -/* - MOVE SCRATCH1 + 0 TO SCRATCH1 WITH CARRY - -at 0x000000ae : */ 0x7f350000,0x00000000, -/* - MOVE SCRATCH2 + 0 TO SCRATCH2 WITH CARRY - -at 0x000000b0 : */ 0x7f360000,0x00000000, -/* - MOVE SCRATCH3 + 0 TO SCRATCH3 WITH CARRY - -at 0x000000b2 : */ 0x7f370000,0x00000000, -/* - - MOVE MEMORY 4, addr_scratch, dataout_to_jump + 4 - -at 0x000000b4 : */ 0xc0000004,0x00000000,0x000002e0, -/* - -dataout_to_jump: - MOVE MEMORY 4, 0, dataout_jump + 4 - -at 0x000000b7 : */ 0xc0000004,0x00000000,0x000002f8, -/* - - ; Time to correct DSA following memory move - MOVE MEMORY 4, saved_dsa, addr_dsa - -at 0x000000ba : */ 0xc0000004,0x00000000,0x00000000, -/* - -dataout_jump: - JUMP 0 - -at 0x000000bd : */ 0x80080000,0x00000000, -/* - -; Nasty jump to dsa->dsain -do_datain: - - MOVE MEMORY 4, saved_dsa, addr_scratch - -at 0x000000bf : */ 0xc0000004,0x00000000,0x00000000, -/* - - - - MOVE SCRATCH0 + dsa_datain TO SCRATCH0 - -at 0x000000c2 : */ 0x7e345400,0x00000000, -/* - MOVE SCRATCH1 + 0 TO SCRATCH1 WITH CARRY - -at 0x000000c4 : */ 0x7f350000,0x00000000, -/* - MOVE SCRATCH2 + 0 TO SCRATCH2 WITH CARRY - -at 0x000000c6 : */ 0x7f360000,0x00000000, -/* - MOVE SCRATCH3 + 0 TO SCRATCH3 WITH CARRY - -at 0x000000c8 : */ 0x7f370000,0x00000000, -/* - - MOVE MEMORY 4, addr_scratch, datain_to_jump + 4 - -at 0x000000ca : */ 0xc0000004,0x00000000,0x00000338, -/* - -ENTRY datain_to_jump -datain_to_jump: - MOVE MEMORY 4, 0, datain_jump + 4 - -at 0x000000cd : */ 0xc0000004,0x00000000,0x00000350, -/* - - ; Time to correct DSA following memory move - MOVE MEMORY 4, saved_dsa, addr_dsa - -at 0x000000d0 : */ 0xc0000004,0x00000000,0x00000000, -/* - - - - -datain_jump: - JUMP 0 - -at 0x000000d3 : */ 0x80080000,0x00000000, -/* - - - -; Note that other_out and other_in loop until a non-data phase -; is discovered, so we only execute return statements when we -; can go on to the next data phase block move statement. - -ENTRY other_out -other_out: - - - - INT int_err_unexpected_phase, WHEN CMD - -at 0x000000d5 : */ 0x9a0b0000,0x00000000, -/* - JUMP msg_in_restart, WHEN MSG_IN - -at 0x000000d7 : */ 0x870b0000,0x000003fc, -/* - INT int_err_unexpected_phase, WHEN MSG_OUT - -at 0x000000d9 : */ 0x9e0b0000,0x00000000, -/* - INT int_err_unexpected_phase, WHEN DATA_IN - -at 0x000000db : */ 0x990b0000,0x00000000, -/* - JUMP command_complete, WHEN STATUS - -at 0x000000dd : */ 0x830b0000,0x0000065c, -/* - JUMP other_out, WHEN NOT DATA_OUT - -at 0x000000df : */ 0x80030000,0x00000354, -/* - -; TEMP should be OK, as we got here from a call in the user dataout code. - - RETURN - -at 0x000000e1 : */ 0x90080000,0x00000000, -/* - -ENTRY other_in -other_in: - - - - INT int_err_unexpected_phase, WHEN CMD - -at 0x000000e3 : */ 0x9a0b0000,0x00000000, -/* - JUMP msg_in_restart, WHEN MSG_IN - -at 0x000000e5 : */ 0x870b0000,0x000003fc, -/* - INT int_err_unexpected_phase, WHEN MSG_OUT - -at 0x000000e7 : */ 0x9e0b0000,0x00000000, -/* - INT int_err_unexpected_phase, WHEN DATA_OUT - -at 0x000000e9 : */ 0x980b0000,0x00000000, -/* - JUMP command_complete, WHEN STATUS - -at 0x000000eb : */ 0x830b0000,0x0000065c, -/* - JUMP other_in, WHEN NOT DATA_IN - -at 0x000000ed : */ 0x81030000,0x0000038c, -/* - -; TEMP should be OK, as we got here from a call in the user datain code. - - RETURN - -at 0x000000ef : */ 0x90080000,0x00000000, -/* - - -ENTRY other_transfer -other_transfer: - INT int_err_unexpected_phase, WHEN CMD - -at 0x000000f1 : */ 0x9a0b0000,0x00000000, -/* - CALL msg_in, WHEN MSG_IN - -at 0x000000f3 : */ 0x8f0b0000,0x0000041c, -/* - INT int_err_unexpected_phase, WHEN MSG_OUT - -at 0x000000f5 : */ 0x9e0b0000,0x00000000, -/* - INT int_err_unexpected_phase, WHEN DATA_OUT - -at 0x000000f7 : */ 0x980b0000,0x00000000, -/* - INT int_err_unexpected_phase, WHEN DATA_IN - -at 0x000000f9 : */ 0x990b0000,0x00000000, -/* - JUMP command_complete, WHEN STATUS - -at 0x000000fb : */ 0x830b0000,0x0000065c, -/* - JUMP other_transfer - -at 0x000000fd : */ 0x80080000,0x000003c4, -/* - -; -; msg_in_restart -; msg_in -; munge_msg -; -; PURPOSE : process messages from a target. msg_in is called when the -; caller hasn't read the first byte of the message. munge_message -; is called when the caller has read the first byte of the message, -; and left it in SFBR. msg_in_restart is called when the caller -; hasn't read the first byte of the message, and wishes RETURN -; to transfer control back to the address of the conditional -; CALL instruction rather than to the instruction after it. -; -; Various int_* interrupts are generated when the host system -; needs to intervene, as is the case with SDTR, WDTR, and -; INITIATE RECOVERY messages. -; -; When the host system handles one of these interrupts, -; it can respond by reentering at reject_message, -; which rejects the message and returns control to -; the caller of msg_in or munge_msg, accept_message -; which clears ACK and returns control, or reply_message -; which sends the message pointed to by the DSA -; msgout_other table indirect field. -; -; DISCONNECT messages are handled by moving the command -; to the reconnect_dsa_queue. - -; NOTE: DSA should be valid when we get here - we cannot save both it -; and TEMP in this routine. - -; -; INPUTS : DSA - SCSI COMMAND, SFBR - first byte of message (munge_msg -; only) -; -; CALLS : NO. The TEMP register isn't backed up to allow nested calls. -; -; MODIFIES : SCRATCH, DSA on DISCONNECT -; -; EXITS : On receipt of SAVE DATA POINTER, RESTORE POINTERS, -; and normal return from message handlers running under -; Linux, control is returned to the caller. Receipt -; of DISCONNECT messages pass control to dsa_schedule. -; -ENTRY msg_in_restart -msg_in_restart: -; XXX - hackish -; -; Since it's easier to debug changes to the statically -; compiled code, rather than the dynamically generated -; stuff, such as -; -; MOVE x, y, WHEN data_phase -; CALL other_z, WHEN NOT data_phase -; MOVE x, y, WHEN data_phase -; -; I'd like to have certain routines (notably the message handler) -; restart on the conditional call rather than the next instruction. -; -; So, subtract 8 from the return address - - MOVE TEMP0 + 0xf8 TO TEMP0 - -at 0x000000ff : */ 0x7e1cf800,0x00000000, -/* - MOVE TEMP1 + 0xff TO TEMP1 WITH CARRY - -at 0x00000101 : */ 0x7f1dff00,0x00000000, -/* - MOVE TEMP2 + 0xff TO TEMP2 WITH CARRY - -at 0x00000103 : */ 0x7f1eff00,0x00000000, -/* - MOVE TEMP3 + 0xff TO TEMP3 WITH CARRY - -at 0x00000105 : */ 0x7f1fff00,0x00000000, -/* - -ENTRY msg_in -msg_in: - MOVE 1, msg_buf, WHEN MSG_IN - -at 0x00000107 : */ 0x0f000001,0x00000000, -/* - -munge_msg: - JUMP munge_extended, IF 0x01 ; EXTENDED MESSAGE - -at 0x00000109 : */ 0x800c0001,0x00000574, -/* - JUMP munge_2, IF 0x20, AND MASK 0xdf ; two byte message - -at 0x0000010b : */ 0x800cdf20,0x00000464, -/* -; -; XXX - I've seen a handful of broken SCSI devices which fail to issue -; a SAVE POINTERS message before disconnecting in the middle of -; a transfer, assuming that the DATA POINTER will be implicitly -; restored. -; -; Historically, I've often done an implicit save when the DISCONNECT -; message is processed. We may want to consider having the option of -; doing that here. -; - JUMP munge_save_data_pointer, IF 0x02 ; SAVE DATA POINTER - -at 0x0000010d : */ 0x800c0002,0x0000046c, -/* - JUMP munge_restore_pointers, IF 0x03 ; RESTORE POINTERS - -at 0x0000010f : */ 0x800c0003,0x00000518, -/* - JUMP munge_disconnect, IF 0x04 ; DISCONNECT - -at 0x00000111 : */ 0x800c0004,0x0000056c, -/* - INT int_msg_1, IF 0x07 ; MESSAGE REJECT - -at 0x00000113 : */ 0x980c0007,0x01020000, -/* - INT int_msg_1, IF 0x0f ; INITIATE RECOVERY - -at 0x00000115 : */ 0x980c000f,0x01020000, -/* - - - - JUMP reject_message - -at 0x00000117 : */ 0x80080000,0x00000604, -/* - -munge_2: - JUMP reject_message - -at 0x00000119 : */ 0x80080000,0x00000604, -/* -; -; The SCSI standard allows targets to recover from transient -; error conditions by backing up the data pointer with a -; RESTORE POINTERS message. -; -; So, we must save and restore the _residual_ code as well as -; the current instruction pointer. Because of this messiness, -; it is simpler to put dynamic code in the dsa for this and to -; just do a simple jump down there. -; - -munge_save_data_pointer: - - ; We have something in TEMP here, so first we must save that - MOVE TEMP0 TO SFBR - -at 0x0000011b : */ 0x721c0000,0x00000000, -/* - MOVE SFBR TO SCRATCH0 - -at 0x0000011d : */ 0x6a340000,0x00000000, -/* - MOVE TEMP1 TO SFBR - -at 0x0000011f : */ 0x721d0000,0x00000000, -/* - MOVE SFBR TO SCRATCH1 - -at 0x00000121 : */ 0x6a350000,0x00000000, -/* - MOVE TEMP2 TO SFBR - -at 0x00000123 : */ 0x721e0000,0x00000000, -/* - MOVE SFBR TO SCRATCH2 - -at 0x00000125 : */ 0x6a360000,0x00000000, -/* - MOVE TEMP3 TO SFBR - -at 0x00000127 : */ 0x721f0000,0x00000000, -/* - MOVE SFBR TO SCRATCH3 - -at 0x00000129 : */ 0x6a370000,0x00000000, -/* - MOVE MEMORY 4, addr_scratch, jump_temp + 4 - -at 0x0000012b : */ 0xc0000004,0x00000000,0x000009c8, -/* - ; Now restore DSA - MOVE MEMORY 4, saved_dsa, addr_dsa - -at 0x0000012e : */ 0xc0000004,0x00000000,0x00000000, -/* - - MOVE DSA0 + dsa_save_data_pointer TO SFBR - -at 0x00000131 : */ 0x76100000,0x00000000, -/* - MOVE SFBR TO SCRATCH0 - -at 0x00000133 : */ 0x6a340000,0x00000000, -/* - MOVE DSA1 + 0xff TO SFBR WITH CARRY - -at 0x00000135 : */ 0x7711ff00,0x00000000, -/* - MOVE SFBR TO SCRATCH1 - -at 0x00000137 : */ 0x6a350000,0x00000000, -/* - MOVE DSA2 + 0xff TO SFBR WITH CARRY - -at 0x00000139 : */ 0x7712ff00,0x00000000, -/* - MOVE SFBR TO SCRATCH2 - -at 0x0000013b : */ 0x6a360000,0x00000000, -/* - MOVE DSA3 + 0xff TO SFBR WITH CARRY - -at 0x0000013d : */ 0x7713ff00,0x00000000, -/* - MOVE SFBR TO SCRATCH3 - -at 0x0000013f : */ 0x6a370000,0x00000000, -/* - - - MOVE MEMORY 4, addr_scratch, jump_dsa_save + 4 - -at 0x00000141 : */ 0xc0000004,0x00000000,0x00000514, -/* - -jump_dsa_save: - JUMP 0 - -at 0x00000144 : */ 0x80080000,0x00000000, -/* - -munge_restore_pointers: - - ; The code at dsa_restore_pointers will RETURN, but we don't care - ; about TEMP here, as it will overwrite it anyway. - - MOVE DSA0 + dsa_restore_pointers TO SFBR - -at 0x00000146 : */ 0x76100000,0x00000000, -/* - MOVE SFBR TO SCRATCH0 - -at 0x00000148 : */ 0x6a340000,0x00000000, -/* - MOVE DSA1 + 0xff TO SFBR WITH CARRY - -at 0x0000014a : */ 0x7711ff00,0x00000000, -/* - MOVE SFBR TO SCRATCH1 - -at 0x0000014c : */ 0x6a350000,0x00000000, -/* - MOVE DSA2 + 0xff TO SFBR WITH CARRY - -at 0x0000014e : */ 0x7712ff00,0x00000000, -/* - MOVE SFBR TO SCRATCH2 - -at 0x00000150 : */ 0x6a360000,0x00000000, -/* - MOVE DSA3 + 0xff TO SFBR WITH CARRY - -at 0x00000152 : */ 0x7713ff00,0x00000000, -/* - MOVE SFBR TO SCRATCH3 - -at 0x00000154 : */ 0x6a370000,0x00000000, -/* - - - MOVE MEMORY 4, addr_scratch, jump_dsa_restore + 4 - -at 0x00000156 : */ 0xc0000004,0x00000000,0x00000568, -/* - -jump_dsa_restore: - JUMP 0 - -at 0x00000159 : */ 0x80080000,0x00000000, -/* - - -munge_disconnect: - - - - - - - - - - - - - - - - - - - - - JUMP dsa_schedule - -at 0x0000015b : */ 0x80080000,0x00000178, -/* - - - - - -munge_extended: - CLEAR ACK - -at 0x0000015d : */ 0x60000040,0x00000000, -/* - INT int_err_unexpected_phase, WHEN NOT MSG_IN - -at 0x0000015f : */ 0x9f030000,0x00000000, -/* - MOVE 1, msg_buf + 1, WHEN MSG_IN - -at 0x00000161 : */ 0x0f000001,0x00000001, -/* - JUMP munge_extended_2, IF 0x02 - -at 0x00000163 : */ 0x800c0002,0x000005a4, -/* - JUMP munge_extended_3, IF 0x03 - -at 0x00000165 : */ 0x800c0003,0x000005d4, -/* - JUMP reject_message - -at 0x00000167 : */ 0x80080000,0x00000604, -/* - -munge_extended_2: - CLEAR ACK - -at 0x00000169 : */ 0x60000040,0x00000000, -/* - MOVE 1, msg_buf + 2, WHEN MSG_IN - -at 0x0000016b : */ 0x0f000001,0x00000002, -/* - JUMP reject_message, IF NOT 0x02 ; Must be WDTR - -at 0x0000016d : */ 0x80040002,0x00000604, -/* - CLEAR ACK - -at 0x0000016f : */ 0x60000040,0x00000000, -/* - MOVE 1, msg_buf + 3, WHEN MSG_IN - -at 0x00000171 : */ 0x0f000001,0x00000003, -/* - INT int_msg_wdtr - -at 0x00000173 : */ 0x98080000,0x01000000, -/* - -munge_extended_3: - CLEAR ACK - -at 0x00000175 : */ 0x60000040,0x00000000, -/* - MOVE 1, msg_buf + 2, WHEN MSG_IN - -at 0x00000177 : */ 0x0f000001,0x00000002, -/* - JUMP reject_message, IF NOT 0x01 ; Must be SDTR - -at 0x00000179 : */ 0x80040001,0x00000604, -/* - CLEAR ACK - -at 0x0000017b : */ 0x60000040,0x00000000, -/* - MOVE 2, msg_buf + 3, WHEN MSG_IN - -at 0x0000017d : */ 0x0f000002,0x00000003, -/* - INT int_msg_sdtr - -at 0x0000017f : */ 0x98080000,0x01010000, -/* - -ENTRY reject_message -reject_message: - SET ATN - -at 0x00000181 : */ 0x58000008,0x00000000, -/* - CLEAR ACK - -at 0x00000183 : */ 0x60000040,0x00000000, -/* - MOVE 1, NCR53c7xx_msg_reject, WHEN MSG_OUT - -at 0x00000185 : */ 0x0e000001,0x00000000, -/* - RETURN - -at 0x00000187 : */ 0x90080000,0x00000000, -/* - -ENTRY accept_message -accept_message: - CLEAR ATN - -at 0x00000189 : */ 0x60000008,0x00000000, -/* - CLEAR ACK - -at 0x0000018b : */ 0x60000040,0x00000000, -/* - RETURN - -at 0x0000018d : */ 0x90080000,0x00000000, -/* - -ENTRY respond_message -respond_message: - SET ATN - -at 0x0000018f : */ 0x58000008,0x00000000, -/* - CLEAR ACK - -at 0x00000191 : */ 0x60000040,0x00000000, -/* - MOVE FROM dsa_msgout_other, WHEN MSG_OUT - -at 0x00000193 : */ 0x1e000000,0x00000068, -/* - RETURN - -at 0x00000195 : */ 0x90080000,0x00000000, -/* - -; -; command_complete -; -; PURPOSE : handle command termination when STATUS IN is detected by reading -; a status byte followed by a command termination message. -; -; Normal termination results in an INTFLY instruction, and -; the host system can pick out which command terminated by -; examining the MESSAGE and STATUS buffers of all currently -; executing commands; -; -; Abnormal (CHECK_CONDITION) termination results in an -; int_err_check_condition interrupt so that a REQUEST SENSE -; command can be issued out-of-order so that no other command -; clears the contingent allegiance condition. -; -; -; INPUTS : DSA - command -; -; CALLS : OK -; -; EXITS : On successful termination, control is passed to schedule. -; On abnormal termination, the user will usually modify the -; DSA fields and corresponding buffers and return control -; to select. -; - -ENTRY command_complete -command_complete: - MOVE FROM dsa_status, WHEN STATUS - -at 0x00000197 : */ 0x1b000000,0x00000060, -/* - - MOVE SFBR TO SCRATCH0 ; Save status - -at 0x00000199 : */ 0x6a340000,0x00000000, -/* - -ENTRY command_complete_msgin -command_complete_msgin: - MOVE FROM dsa_msgin, WHEN MSG_IN - -at 0x0000019b : */ 0x1f000000,0x00000058, -/* -; Indicate that we should be expecting a disconnect - - - - ; Above code cleared the Unexpected Disconnect bit, what do we do? - - CLEAR ACK - -at 0x0000019d : */ 0x60000040,0x00000000, -/* - - WAIT DISCONNECT - -at 0x0000019f : */ 0x48000000,0x00000000, -/* - -; -; The SCSI specification states that when a UNIT ATTENTION condition -; is pending, as indicated by a CHECK CONDITION status message, -; the target shall revert to asynchronous transfers. Since -; synchronous transfers parameters are maintained on a per INITIATOR/TARGET -; basis, and returning control to our scheduler could work on a command -; running on another lun on that target using the old parameters, we must -; interrupt the host processor to get them changed, or change them ourselves. -; -; Once SCSI-II tagged queueing is implemented, things will be even more -; hairy, since contingent allegiance conditions exist on a per-target/lun -; basis, and issuing a new command with a different tag would clear it. -; In these cases, we must interrupt the host processor to get a request -; added to the HEAD of the queue with the request sense command, or we -; must automatically issue the request sense command. - - - - - - - - INT int_norm_emulateintfly - -at 0x000001a1 : */ 0x98080000,0x02060000, -/* - - - - - - - ; Time to correct DSA following memory move - MOVE MEMORY 4, saved_dsa, addr_dsa - -at 0x000001a3 : */ 0xc0000004,0x00000000,0x00000000, -/* - - - - - - JUMP schedule - -at 0x000001a6 : */ 0x80080000,0x00000000, -/* -command_failed: - INT int_err_check_condition - -at 0x000001a8 : */ 0x98080000,0x00030000, -/* - - - - -; -; wait_reselect -; -; PURPOSE : This is essentially the idle routine, where control lands -; when there are no new processes to schedule. wait_reselect -; waits for reselection, selection, and new commands. -; -; When a successful reselection occurs, with the aid -; of fixed up code in each DSA, wait_reselect walks the -; reconnect_dsa_queue, asking each dsa if the target ID -; and LUN match its. -; -; If a match is found, a call is made back to reselected_ok, -; which through the miracles of self modifying code, extracts -; the found DSA from the reconnect_dsa_queue and then -; returns control to the DSAs thread of execution. -; -; INPUTS : NONE -; -; CALLS : OK -; -; MODIFIES : DSA, -; -; EXITS : On successful reselection, control is returned to the -; DSA which called reselected_ok. If the WAIT RESELECT -; was interrupted by a new commands arrival signaled by -; SIG_P, control is passed to schedule. If the NCR is -; selected, the host system is interrupted with an -; int_err_selected which is usually responded to by -; setting DSP to the target_abort address. - -ENTRY wait_reselect -wait_reselect: - - - - - - - WAIT RESELECT wait_reselect_failed - -at 0x000001aa : */ 0x50000000,0x00000800, -/* - -reselected: - - - - CLEAR TARGET - -at 0x000001ac : */ 0x60000200,0x00000000, -/* - - ; Read all data needed to reestablish the nexus - - MOVE 1, reselected_identify, WHEN MSG_IN - -at 0x000001ae : */ 0x0f000001,0x00000000, -/* - ; We used to CLEAR ACK here. - - - - - - ; Point DSA at the current head of the disconnected queue. - - MOVE MEMORY 4, reconnect_dsa_head, addr_scratch - -at 0x000001b0 : */ 0xc0000004,0x00000000,0x00000000, -/* - - - MOVE MEMORY 4, addr_scratch, saved_dsa - -at 0x000001b3 : */ 0xc0000004,0x00000000,0x00000000, -/* - - - - - ; Fix the update-next pointer so that the reconnect_dsa_head - ; pointer is the one that will be updated if this DSA is a hit - ; and we remove it from the queue. - - MOVE MEMORY 4, addr_reconnect_dsa_head, reselected_ok_patch + 8 - -at 0x000001b6 : */ 0xc0000004,0x00000000,0x000007ec, -/* - - ; Time to correct DSA following memory move - MOVE MEMORY 4, saved_dsa, addr_dsa - -at 0x000001b9 : */ 0xc0000004,0x00000000,0x00000000, -/* - - -ENTRY reselected_check_next -reselected_check_next: - - - - ; Check for a NULL pointer. - MOVE DSA0 TO SFBR - -at 0x000001bc : */ 0x72100000,0x00000000, -/* - JUMP reselected_not_end, IF NOT 0 - -at 0x000001be : */ 0x80040000,0x00000738, -/* - MOVE DSA1 TO SFBR - -at 0x000001c0 : */ 0x72110000,0x00000000, -/* - JUMP reselected_not_end, IF NOT 0 - -at 0x000001c2 : */ 0x80040000,0x00000738, -/* - MOVE DSA2 TO SFBR - -at 0x000001c4 : */ 0x72120000,0x00000000, -/* - JUMP reselected_not_end, IF NOT 0 - -at 0x000001c6 : */ 0x80040000,0x00000738, -/* - MOVE DSA3 TO SFBR - -at 0x000001c8 : */ 0x72130000,0x00000000, -/* - JUMP reselected_not_end, IF NOT 0 - -at 0x000001ca : */ 0x80040000,0x00000738, -/* - INT int_err_unexpected_reselect - -at 0x000001cc : */ 0x98080000,0x00020000, -/* - -reselected_not_end: - ; - ; XXX the ALU is only eight bits wide, and the assembler - ; wont do the dirt work for us. As long as dsa_check_reselect - ; is negative, we need to sign extend with 1 bits to the full - ; 32 bit width of the address. - ; - ; A potential work around would be to have a known alignment - ; of the DSA structure such that the base address plus - ; dsa_check_reselect doesn't require carrying from bytes - ; higher than the LSB. - ; - - MOVE DSA0 TO SFBR - -at 0x000001ce : */ 0x72100000,0x00000000, -/* - MOVE SFBR + dsa_check_reselect TO SCRATCH0 - -at 0x000001d0 : */ 0x6e340000,0x00000000, -/* - MOVE DSA1 TO SFBR - -at 0x000001d2 : */ 0x72110000,0x00000000, -/* - MOVE SFBR + 0xff TO SCRATCH1 WITH CARRY - -at 0x000001d4 : */ 0x6f35ff00,0x00000000, -/* - MOVE DSA2 TO SFBR - -at 0x000001d6 : */ 0x72120000,0x00000000, -/* - MOVE SFBR + 0xff TO SCRATCH2 WITH CARRY - -at 0x000001d8 : */ 0x6f36ff00,0x00000000, -/* - MOVE DSA3 TO SFBR - -at 0x000001da : */ 0x72130000,0x00000000, -/* - MOVE SFBR + 0xff TO SCRATCH3 WITH CARRY - -at 0x000001dc : */ 0x6f37ff00,0x00000000, -/* - - - MOVE MEMORY 4, addr_scratch, reselected_check + 4 - -at 0x000001de : */ 0xc0000004,0x00000000,0x00000794, -/* - - - ; Time to correct DSA following memory move - MOVE MEMORY 4, saved_dsa, addr_dsa - -at 0x000001e1 : */ 0xc0000004,0x00000000,0x00000000, -/* - -reselected_check: - JUMP 0 - -at 0x000001e4 : */ 0x80080000,0x00000000, -/* - - -; -; - -; We have problems here - the memory move corrupts TEMP and DSA. This -; routine is called from DSA code, and patched from many places. Scratch -; is probably free when it is called. -; We have to: -; copy temp to scratch, one byte at a time -; write scratch to patch a jump in place of the return -; do the move memory -; jump to the patched in return address -; DSA is corrupt when we get here, and can be left corrupt - -ENTRY reselected_ok -reselected_ok: - MOVE TEMP0 TO SFBR - -at 0x000001e6 : */ 0x721c0000,0x00000000, -/* - MOVE SFBR TO SCRATCH0 - -at 0x000001e8 : */ 0x6a340000,0x00000000, -/* - MOVE TEMP1 TO SFBR - -at 0x000001ea : */ 0x721d0000,0x00000000, -/* - MOVE SFBR TO SCRATCH1 - -at 0x000001ec : */ 0x6a350000,0x00000000, -/* - MOVE TEMP2 TO SFBR - -at 0x000001ee : */ 0x721e0000,0x00000000, -/* - MOVE SFBR TO SCRATCH2 - -at 0x000001f0 : */ 0x6a360000,0x00000000, -/* - MOVE TEMP3 TO SFBR - -at 0x000001f2 : */ 0x721f0000,0x00000000, -/* - MOVE SFBR TO SCRATCH3 - -at 0x000001f4 : */ 0x6a370000,0x00000000, -/* - MOVE MEMORY 4, addr_scratch, reselected_ok_jump + 4 - -at 0x000001f6 : */ 0xc0000004,0x00000000,0x000007f4, -/* -reselected_ok_patch: - MOVE MEMORY 4, 0, 0 - -at 0x000001f9 : */ 0xc0000004,0x00000000,0x00000000, -/* -reselected_ok_jump: - JUMP 0 - -at 0x000001fc : */ 0x80080000,0x00000000, -/* - - - - - -selected: - INT int_err_selected; - -at 0x000001fe : */ 0x98080000,0x00010000, -/* - -; -; A select or reselect failure can be caused by one of two conditions : -; 1. SIG_P was set. This will be the case if the user has written -; a new value to a previously NULL head of the issue queue. -; -; 2. The NCR53c810 was selected or reselected by another device. -; -; 3. The bus was already busy since we were selected or reselected -; before starting the command. - -wait_reselect_failed: - - - -; Check selected bit. - - ; Must work out how to tell if we are selected.... - - - - -; Reading CTEST2 clears the SIG_P bit in the ISTAT register. - MOVE CTEST2 & 0x40 TO SFBR - -at 0x00000200 : */ 0x74164000,0x00000000, -/* - JUMP schedule, IF 0x40 - -at 0x00000202 : */ 0x800c0040,0x00000000, -/* -; Check connected bit. -; FIXME: this needs to change if we support target mode - MOVE ISTAT & 0x08 TO SFBR - -at 0x00000204 : */ 0x74210800,0x00000000, -/* - JUMP reselected, IF 0x08 - -at 0x00000206 : */ 0x800c0008,0x000006b0, -/* -; FIXME : Something bogus happened, and we shouldn't fail silently. - - - - INT int_debug_panic - -at 0x00000208 : */ 0x98080000,0x030b0000, -/* - - - -select_failed: - - ; Disable selection timer - MOVE CTEST7 | 0x10 TO CTEST7 - -at 0x0000020a : */ 0x7a1b1000,0x00000000, -/* - - - - -; Otherwise, mask the selected and reselected bits off SIST0 - - ; Let's assume we don't get selected for now - MOVE SSTAT0 & 0x10 TO SFBR - -at 0x0000020c : */ 0x740d1000,0x00000000, -/* - - - - - JUMP reselected, IF 0x10 - -at 0x0000020e : */ 0x800c0010,0x000006b0, -/* -; If SIGP is set, the user just gave us another command, and -; we should restart or return to the scheduler. -; Reading CTEST2 clears the SIG_P bit in the ISTAT register. - MOVE CTEST2 & 0x40 TO SFBR - -at 0x00000210 : */ 0x74164000,0x00000000, -/* - JUMP select, IF 0x40 - -at 0x00000212 : */ 0x800c0040,0x000001f8, -/* -; Check connected bit. -; FIXME: this needs to change if we support target mode -; FIXME: is this really necessary? - MOVE ISTAT & 0x08 TO SFBR - -at 0x00000214 : */ 0x74210800,0x00000000, -/* - JUMP reselected, IF 0x08 - -at 0x00000216 : */ 0x800c0008,0x000006b0, -/* -; FIXME : Something bogus happened, and we shouldn't fail silently. - - - - INT int_debug_panic - -at 0x00000218 : */ 0x98080000,0x030b0000, -/* - - -; -; test_1 -; test_2 -; -; PURPOSE : run some verification tests on the NCR. test_1 -; copies test_src to test_dest and interrupts the host -; processor, testing for cache coherency and interrupt -; problems in the processes. -; -; test_2 runs a command with offsets relative to the -; DSA on entry, and is useful for miscellaneous experimentation. -; - -; Verify that interrupts are working correctly and that we don't -; have a cache invalidation problem. - -ABSOLUTE test_src = 0, test_dest = 0 -ENTRY test_1 -test_1: - MOVE MEMORY 4, test_src, test_dest - -at 0x0000021a : */ 0xc0000004,0x00000000,0x00000000, -/* - INT int_test_1 - -at 0x0000021d : */ 0x98080000,0x04000000, -/* - -; -; Run arbitrary commands, with test code establishing a DSA -; - -ENTRY test_2 -test_2: - CLEAR TARGET - -at 0x0000021f : */ 0x60000200,0x00000000, -/* - - ; Enable selection timer - - - - MOVE CTEST7 & 0xef TO CTEST7 - -at 0x00000221 : */ 0x7c1bef00,0x00000000, -/* - - - SELECT ATN FROM 0, test_2_fail - -at 0x00000223 : */ 0x43000000,0x000008dc, -/* - JUMP test_2_msgout, WHEN MSG_OUT - -at 0x00000225 : */ 0x860b0000,0x0000089c, -/* -ENTRY test_2_msgout -test_2_msgout: - - ; Disable selection timer - MOVE CTEST7 | 0x10 TO CTEST7 - -at 0x00000227 : */ 0x7a1b1000,0x00000000, -/* - - MOVE FROM 8, WHEN MSG_OUT - -at 0x00000229 : */ 0x1e000000,0x00000008, -/* - MOVE FROM 16, WHEN CMD - -at 0x0000022b : */ 0x1a000000,0x00000010, -/* - MOVE FROM 24, WHEN DATA_IN - -at 0x0000022d : */ 0x19000000,0x00000018, -/* - MOVE FROM 32, WHEN STATUS - -at 0x0000022f : */ 0x1b000000,0x00000020, -/* - MOVE FROM 40, WHEN MSG_IN - -at 0x00000231 : */ 0x1f000000,0x00000028, -/* - - - - CLEAR ACK - -at 0x00000233 : */ 0x60000040,0x00000000, -/* - WAIT DISCONNECT - -at 0x00000235 : */ 0x48000000,0x00000000, -/* -test_2_fail: - - ; Disable selection timer - MOVE CTEST7 | 0x10 TO CTEST7 - -at 0x00000237 : */ 0x7a1b1000,0x00000000, -/* - - INT int_test_2 - -at 0x00000239 : */ 0x98080000,0x04010000, -/* - -ENTRY debug_break -debug_break: - INT int_debug_break - -at 0x0000023b : */ 0x98080000,0x03000000, -/* - -; -; initiator_abort -; target_abort -; -; PURPOSE : Abort the currently established nexus from with initiator -; or target mode. -; -; - -ENTRY target_abort -target_abort: - SET TARGET - -at 0x0000023d : */ 0x58000200,0x00000000, -/* - DISCONNECT - -at 0x0000023f : */ 0x48000000,0x00000000, -/* - CLEAR TARGET - -at 0x00000241 : */ 0x60000200,0x00000000, -/* - JUMP schedule - -at 0x00000243 : */ 0x80080000,0x00000000, -/* - -ENTRY initiator_abort -initiator_abort: - SET ATN - -at 0x00000245 : */ 0x58000008,0x00000000, -/* -; -; The SCSI-I specification says that targets may go into MSG out at -; their leisure upon receipt of the ATN single. On all versions of the -; specification, we can't change phases until REQ transitions true->false, -; so we need to sink/source one byte of data to allow the transition. -; -; For the sake of safety, we'll only source one byte of data in all -; cases, but to accommodate the SCSI-I dain bramage, we'll sink an -; arbitrary number of bytes. - JUMP spew_cmd, WHEN CMD - -at 0x00000247 : */ 0x820b0000,0x0000094c, -/* - JUMP eat_msgin, WHEN MSG_IN - -at 0x00000249 : */ 0x870b0000,0x0000095c, -/* - JUMP eat_datain, WHEN DATA_IN - -at 0x0000024b : */ 0x810b0000,0x0000098c, -/* - JUMP eat_status, WHEN STATUS - -at 0x0000024d : */ 0x830b0000,0x00000974, -/* - JUMP spew_dataout, WHEN DATA_OUT - -at 0x0000024f : */ 0x800b0000,0x000009a4, -/* - JUMP sated - -at 0x00000251 : */ 0x80080000,0x000009ac, -/* -spew_cmd: - MOVE 1, NCR53c7xx_zero, WHEN CMD - -at 0x00000253 : */ 0x0a000001,0x00000000, -/* - JUMP sated - -at 0x00000255 : */ 0x80080000,0x000009ac, -/* -eat_msgin: - MOVE 1, NCR53c7xx_sink, WHEN MSG_IN - -at 0x00000257 : */ 0x0f000001,0x00000000, -/* - JUMP eat_msgin, WHEN MSG_IN - -at 0x00000259 : */ 0x870b0000,0x0000095c, -/* - JUMP sated - -at 0x0000025b : */ 0x80080000,0x000009ac, -/* -eat_status: - MOVE 1, NCR53c7xx_sink, WHEN STATUS - -at 0x0000025d : */ 0x0b000001,0x00000000, -/* - JUMP eat_status, WHEN STATUS - -at 0x0000025f : */ 0x830b0000,0x00000974, -/* - JUMP sated - -at 0x00000261 : */ 0x80080000,0x000009ac, -/* -eat_datain: - MOVE 1, NCR53c7xx_sink, WHEN DATA_IN - -at 0x00000263 : */ 0x09000001,0x00000000, -/* - JUMP eat_datain, WHEN DATA_IN - -at 0x00000265 : */ 0x810b0000,0x0000098c, -/* - JUMP sated - -at 0x00000267 : */ 0x80080000,0x000009ac, -/* -spew_dataout: - MOVE 1, NCR53c7xx_zero, WHEN DATA_OUT - -at 0x00000269 : */ 0x08000001,0x00000000, -/* -sated: - - - - MOVE 1, NCR53c7xx_msg_abort, WHEN MSG_OUT - -at 0x0000026b : */ 0x0e000001,0x00000000, -/* - WAIT DISCONNECT - -at 0x0000026d : */ 0x48000000,0x00000000, -/* - INT int_norm_aborted - -at 0x0000026f : */ 0x98080000,0x02040000, -/* - - - - -; Little patched jump, used to overcome problems with TEMP getting -; corrupted on memory moves. - -jump_temp: - JUMP 0 - -at 0x00000271 : */ 0x80080000,0x00000000, -}; - -#define A_NCR53c7xx_msg_abort 0x00000000 -static u32 A_NCR53c7xx_msg_abort_used[] __attribute((unused)) = { - 0x0000026c, -}; - -#define A_NCR53c7xx_msg_reject 0x00000000 -static u32 A_NCR53c7xx_msg_reject_used[] __attribute((unused)) = { - 0x00000186, -}; - -#define A_NCR53c7xx_sink 0x00000000 -static u32 A_NCR53c7xx_sink_used[] __attribute((unused)) = { - 0x00000258, - 0x0000025e, - 0x00000264, -}; - -#define A_NCR53c7xx_zero 0x00000000 -static u32 A_NCR53c7xx_zero_used[] __attribute((unused)) = { - 0x00000254, - 0x0000026a, -}; - -#define A_NOP_insn 0x00000000 -static u32 A_NOP_insn_used[] __attribute((unused)) = { - 0x00000017, -}; - -#define A_addr_dsa 0x00000000 -static u32 A_addr_dsa_used[] __attribute((unused)) = { - 0x0000000f, - 0x00000026, - 0x00000033, - 0x00000040, - 0x00000055, - 0x00000079, - 0x0000008e, - 0x000000bc, - 0x000000d2, - 0x00000130, - 0x000001a5, - 0x000001bb, - 0x000001e3, -}; - -#define A_addr_reconnect_dsa_head 0x00000000 -static u32 A_addr_reconnect_dsa_head_used[] __attribute((unused)) = { - 0x000001b7, -}; - -#define A_addr_scratch 0x00000000 -static u32 A_addr_scratch_used[] __attribute((unused)) = { - 0x00000002, - 0x00000004, - 0x00000008, - 0x00000020, - 0x00000022, - 0x00000049, - 0x00000060, - 0x0000006a, - 0x00000071, - 0x00000073, - 0x000000ab, - 0x000000b5, - 0x000000c1, - 0x000000cb, - 0x0000012c, - 0x00000142, - 0x00000157, - 0x000001b2, - 0x000001b4, - 0x000001df, - 0x000001f7, -}; - -#define A_addr_temp 0x00000000 -static u32 A_addr_temp_used[] __attribute((unused)) = { -}; - -#define A_dmode_memory_to_memory 0x00000000 -static u32 A_dmode_memory_to_memory_used[] __attribute((unused)) = { -}; - -#define A_dmode_memory_to_ncr 0x00000000 -static u32 A_dmode_memory_to_ncr_used[] __attribute((unused)) = { -}; - -#define A_dmode_ncr_to_memory 0x00000000 -static u32 A_dmode_ncr_to_memory_used[] __attribute((unused)) = { -}; - -#define A_dsa_check_reselect 0x00000000 -static u32 A_dsa_check_reselect_used[] __attribute((unused)) = { - 0x000001d0, -}; - -#define A_dsa_cmdout 0x00000048 -static u32 A_dsa_cmdout_used[] __attribute((unused)) = { - 0x0000009a, -}; - -#define A_dsa_cmnd 0x00000038 -static u32 A_dsa_cmnd_used[] __attribute((unused)) = { -}; - -#define A_dsa_datain 0x00000054 -static u32 A_dsa_datain_used[] __attribute((unused)) = { - 0x000000c2, -}; - -#define A_dsa_dataout 0x00000050 -static u32 A_dsa_dataout_used[] __attribute((unused)) = { - 0x000000ac, -}; - -#define A_dsa_end 0x00000070 -static u32 A_dsa_end_used[] __attribute((unused)) = { -}; - -#define A_dsa_fields_start 0x00000000 -static u32 A_dsa_fields_start_used[] __attribute((unused)) = { -}; - -#define A_dsa_msgin 0x00000058 -static u32 A_dsa_msgin_used[] __attribute((unused)) = { - 0x0000019c, -}; - -#define A_dsa_msgout 0x00000040 -static u32 A_dsa_msgout_used[] __attribute((unused)) = { - 0x00000089, -}; - -#define A_dsa_msgout_other 0x00000068 -static u32 A_dsa_msgout_other_used[] __attribute((unused)) = { - 0x00000194, -}; - -#define A_dsa_next 0x00000030 -static u32 A_dsa_next_used[] __attribute((unused)) = { - 0x00000061, -}; - -#define A_dsa_restore_pointers 0x00000000 -static u32 A_dsa_restore_pointers_used[] __attribute((unused)) = { - 0x00000146, -}; - -#define A_dsa_save_data_pointer 0x00000000 -static u32 A_dsa_save_data_pointer_used[] __attribute((unused)) = { - 0x00000131, -}; - -#define A_dsa_select 0x0000003c -static u32 A_dsa_select_used[] __attribute((unused)) = { - 0x00000082, -}; - -#define A_dsa_sscf_710 0x00000000 -static u32 A_dsa_sscf_710_used[] __attribute((unused)) = { - 0x00000007, -}; - -#define A_dsa_status 0x00000060 -static u32 A_dsa_status_used[] __attribute((unused)) = { - 0x00000198, -}; - -#define A_dsa_temp_addr_array_value 0x00000000 -static u32 A_dsa_temp_addr_array_value_used[] __attribute((unused)) = { -}; - -#define A_dsa_temp_addr_dsa_value 0x00000000 -static u32 A_dsa_temp_addr_dsa_value_used[] __attribute((unused)) = { - 0x00000001, -}; - -#define A_dsa_temp_addr_new_value 0x00000000 -static u32 A_dsa_temp_addr_new_value_used[] __attribute((unused)) = { -}; - -#define A_dsa_temp_addr_next 0x00000000 -static u32 A_dsa_temp_addr_next_used[] __attribute((unused)) = { - 0x0000001c, - 0x0000004f, -}; - -#define A_dsa_temp_addr_residual 0x00000000 -static u32 A_dsa_temp_addr_residual_used[] __attribute((unused)) = { - 0x0000002d, - 0x0000003b, -}; - -#define A_dsa_temp_addr_saved_pointer 0x00000000 -static u32 A_dsa_temp_addr_saved_pointer_used[] __attribute((unused)) = { - 0x0000002b, - 0x00000037, -}; - -#define A_dsa_temp_addr_saved_residual 0x00000000 -static u32 A_dsa_temp_addr_saved_residual_used[] __attribute((unused)) = { - 0x0000002e, - 0x0000003a, -}; - -#define A_dsa_temp_lun 0x00000000 -static u32 A_dsa_temp_lun_used[] __attribute((unused)) = { - 0x0000004c, -}; - -#define A_dsa_temp_next 0x00000000 -static u32 A_dsa_temp_next_used[] __attribute((unused)) = { - 0x0000001f, -}; - -#define A_dsa_temp_sync 0x00000000 -static u32 A_dsa_temp_sync_used[] __attribute((unused)) = { - 0x00000057, -}; - -#define A_dsa_temp_target 0x00000000 -static u32 A_dsa_temp_target_used[] __attribute((unused)) = { - 0x00000045, -}; - -#define A_emulfly 0x00000000 -static u32 A_emulfly_used[] __attribute((unused)) = { -}; - -#define A_int_debug_break 0x03000000 -static u32 A_int_debug_break_used[] __attribute((unused)) = { - 0x0000023c, -}; - -#define A_int_debug_panic 0x030b0000 -static u32 A_int_debug_panic_used[] __attribute((unused)) = { - 0x00000209, - 0x00000219, -}; - -#define A_int_err_check_condition 0x00030000 -static u32 A_int_err_check_condition_used[] __attribute((unused)) = { - 0x000001a9, -}; - -#define A_int_err_no_phase 0x00040000 -static u32 A_int_err_no_phase_used[] __attribute((unused)) = { -}; - -#define A_int_err_selected 0x00010000 -static u32 A_int_err_selected_used[] __attribute((unused)) = { - 0x000001ff, -}; - -#define A_int_err_unexpected_phase 0x00000000 -static u32 A_int_err_unexpected_phase_used[] __attribute((unused)) = { - 0x00000092, - 0x00000098, - 0x000000a0, - 0x000000d6, - 0x000000da, - 0x000000dc, - 0x000000e4, - 0x000000e8, - 0x000000ea, - 0x000000f2, - 0x000000f6, - 0x000000f8, - 0x000000fa, - 0x00000160, -}; - -#define A_int_err_unexpected_reselect 0x00020000 -static u32 A_int_err_unexpected_reselect_used[] __attribute((unused)) = { - 0x000001cd, -}; - -#define A_int_msg_1 0x01020000 -static u32 A_int_msg_1_used[] __attribute((unused)) = { - 0x00000114, - 0x00000116, -}; - -#define A_int_msg_sdtr 0x01010000 -static u32 A_int_msg_sdtr_used[] __attribute((unused)) = { - 0x00000180, -}; - -#define A_int_msg_wdtr 0x01000000 -static u32 A_int_msg_wdtr_used[] __attribute((unused)) = { - 0x00000174, -}; - -#define A_int_norm_aborted 0x02040000 -static u32 A_int_norm_aborted_used[] __attribute((unused)) = { - 0x00000270, -}; - -#define A_int_norm_command_complete 0x02020000 -static u32 A_int_norm_command_complete_used[] __attribute((unused)) = { -}; - -#define A_int_norm_disconnected 0x02030000 -static u32 A_int_norm_disconnected_used[] __attribute((unused)) = { -}; - -#define A_int_norm_emulateintfly 0x02060000 -static u32 A_int_norm_emulateintfly_used[] __attribute((unused)) = { - 0x000001a2, -}; - -#define A_int_norm_reselect_complete 0x02010000 -static u32 A_int_norm_reselect_complete_used[] __attribute((unused)) = { -}; - -#define A_int_norm_reset 0x02050000 -static u32 A_int_norm_reset_used[] __attribute((unused)) = { -}; - -#define A_int_norm_select_complete 0x02000000 -static u32 A_int_norm_select_complete_used[] __attribute((unused)) = { -}; - -#define A_int_test_1 0x04000000 -static u32 A_int_test_1_used[] __attribute((unused)) = { - 0x0000021e, -}; - -#define A_int_test_2 0x04010000 -static u32 A_int_test_2_used[] __attribute((unused)) = { - 0x0000023a, -}; - -#define A_int_test_3 0x04020000 -static u32 A_int_test_3_used[] __attribute((unused)) = { -}; - -#define A_msg_buf 0x00000000 -static u32 A_msg_buf_used[] __attribute((unused)) = { - 0x00000108, - 0x00000162, - 0x0000016c, - 0x00000172, - 0x00000178, - 0x0000017e, -}; - -#define A_reconnect_dsa_head 0x00000000 -static u32 A_reconnect_dsa_head_used[] __attribute((unused)) = { - 0x0000006d, - 0x00000074, - 0x000001b1, -}; - -#define A_reselected_identify 0x00000000 -static u32 A_reselected_identify_used[] __attribute((unused)) = { - 0x00000048, - 0x000001af, -}; - -#define A_reselected_tag 0x00000000 -static u32 A_reselected_tag_used[] __attribute((unused)) = { -}; - -#define A_saved_dsa 0x00000000 -static u32 A_saved_dsa_used[] __attribute((unused)) = { - 0x00000005, - 0x0000000e, - 0x00000023, - 0x00000025, - 0x00000032, - 0x0000003f, - 0x00000054, - 0x0000005f, - 0x00000070, - 0x00000078, - 0x0000008d, - 0x000000aa, - 0x000000bb, - 0x000000c0, - 0x000000d1, - 0x0000012f, - 0x000001a4, - 0x000001b5, - 0x000001ba, - 0x000001e2, -}; - -#define A_schedule 0x00000000 -static u32 A_schedule_used[] __attribute((unused)) = { - 0x0000007d, - 0x000001a7, - 0x00000203, - 0x00000244, -}; - -#define A_test_dest 0x00000000 -static u32 A_test_dest_used[] __attribute((unused)) = { - 0x0000021c, -}; - -#define A_test_src 0x00000000 -static u32 A_test_src_used[] __attribute((unused)) = { - 0x0000021b, -}; - -#define Ent_accept_message 0x00000624 -#define Ent_cmdout_cmdout 0x00000264 -#define Ent_command_complete 0x0000065c -#define Ent_command_complete_msgin 0x0000066c -#define Ent_data_transfer 0x0000026c -#define Ent_datain_to_jump 0x00000334 -#define Ent_debug_break 0x000008ec -#define Ent_dsa_code_begin 0x00000000 -#define Ent_dsa_code_check_reselect 0x0000010c -#define Ent_dsa_code_fix_jump 0x00000058 -#define Ent_dsa_code_restore_pointers 0x000000d8 -#define Ent_dsa_code_save_data_pointer 0x000000a4 -#define Ent_dsa_code_template 0x00000000 -#define Ent_dsa_code_template_end 0x00000178 -#define Ent_dsa_schedule 0x00000178 -#define Ent_dsa_zero 0x00000178 -#define Ent_end_data_transfer 0x000002a4 -#define Ent_initiator_abort 0x00000914 -#define Ent_msg_in 0x0000041c -#define Ent_msg_in_restart 0x000003fc -#define Ent_other_in 0x0000038c -#define Ent_other_out 0x00000354 -#define Ent_other_transfer 0x000003c4 -#define Ent_reject_message 0x00000604 -#define Ent_reselected_check_next 0x000006f0 -#define Ent_reselected_ok 0x00000798 -#define Ent_respond_message 0x0000063c -#define Ent_select 0x000001f8 -#define Ent_select_msgout 0x00000218 -#define Ent_target_abort 0x000008f4 -#define Ent_test_1 0x00000868 -#define Ent_test_2 0x0000087c -#define Ent_test_2_msgout 0x0000089c -#define Ent_wait_reselect 0x000006a8 -static u32 LABELPATCHES[] __attribute((unused)) = { - 0x00000011, - 0x0000001a, - 0x0000001d, - 0x00000028, - 0x0000002a, - 0x00000035, - 0x00000038, - 0x00000042, - 0x00000050, - 0x00000052, - 0x0000006b, - 0x00000083, - 0x00000085, - 0x00000090, - 0x00000094, - 0x00000096, - 0x0000009c, - 0x0000009e, - 0x000000a2, - 0x000000a4, - 0x000000a6, - 0x000000a8, - 0x000000b6, - 0x000000b9, - 0x000000cc, - 0x000000cf, - 0x000000d8, - 0x000000de, - 0x000000e0, - 0x000000e6, - 0x000000ec, - 0x000000ee, - 0x000000f4, - 0x000000fc, - 0x000000fe, - 0x0000010a, - 0x0000010c, - 0x0000010e, - 0x00000110, - 0x00000112, - 0x00000118, - 0x0000011a, - 0x0000012d, - 0x00000143, - 0x00000158, - 0x0000015c, - 0x00000164, - 0x00000166, - 0x00000168, - 0x0000016e, - 0x0000017a, - 0x000001ab, - 0x000001b8, - 0x000001bf, - 0x000001c3, - 0x000001c7, - 0x000001cb, - 0x000001e0, - 0x000001f8, - 0x00000207, - 0x0000020f, - 0x00000213, - 0x00000217, - 0x00000224, - 0x00000226, - 0x00000248, - 0x0000024a, - 0x0000024c, - 0x0000024e, - 0x00000250, - 0x00000252, - 0x00000256, - 0x0000025a, - 0x0000025c, - 0x00000260, - 0x00000262, - 0x00000266, - 0x00000268, -}; - -static struct { - u32 offset; - void *address; -} EXTERNAL_PATCHES[] __attribute((unused)) = { -}; - -static u32 INSTRUCTIONS __attribute((unused)) = 290; -static u32 PATCHES __attribute((unused)) = 78; -static u32 EXTERNAL_PATCHES_LEN __attribute((unused)) = 0; diff --git a/drivers/scsi/53c7xx_u.h_shipped b/drivers/scsi/53c7xx_u.h_shipped deleted file mode 100644 index 7b337174e22..00000000000 --- a/drivers/scsi/53c7xx_u.h_shipped +++ /dev/null @@ -1,102 +0,0 @@ -#undef A_NCR53c7xx_msg_abort -#undef A_NCR53c7xx_msg_reject -#undef A_NCR53c7xx_sink -#undef A_NCR53c7xx_zero -#undef A_NOP_insn -#undef A_addr_dsa -#undef A_addr_reconnect_dsa_head -#undef A_addr_scratch -#undef A_addr_temp -#undef A_dmode_memory_to_memory -#undef A_dmode_memory_to_ncr -#undef A_dmode_ncr_to_memory -#undef A_dsa_check_reselect -#undef A_dsa_cmdout -#undef A_dsa_cmnd -#undef A_dsa_datain -#undef A_dsa_dataout -#undef A_dsa_end -#undef A_dsa_fields_start -#undef A_dsa_msgin -#undef A_dsa_msgout -#undef A_dsa_msgout_other -#undef A_dsa_next -#undef A_dsa_restore_pointers -#undef A_dsa_save_data_pointer -#undef A_dsa_select -#undef A_dsa_sscf_710 -#undef A_dsa_status -#undef A_dsa_temp_addr_array_value -#undef A_dsa_temp_addr_dsa_value -#undef A_dsa_temp_addr_new_value -#undef A_dsa_temp_addr_next -#undef A_dsa_temp_addr_residual -#undef A_dsa_temp_addr_saved_pointer -#undef A_dsa_temp_addr_saved_residual -#undef A_dsa_temp_lun -#undef A_dsa_temp_next -#undef A_dsa_temp_sync -#undef A_dsa_temp_target -#undef A_emulfly -#undef A_int_debug_break -#undef A_int_debug_panic -#undef A_int_err_check_condition -#undef A_int_err_no_phase -#undef A_int_err_selected -#undef A_int_err_unexpected_phase -#undef A_int_err_unexpected_reselect -#undef A_int_msg_1 -#undef A_int_msg_sdtr -#undef A_int_msg_wdtr -#undef A_int_norm_aborted -#undef A_int_norm_command_complete -#undef A_int_norm_disconnected -#undef A_int_norm_emulateintfly -#undef A_int_norm_reselect_complete -#undef A_int_norm_reset -#undef A_int_norm_select_complete -#undef A_int_test_1 -#undef A_int_test_2 -#undef A_int_test_3 -#undef A_msg_buf -#undef A_reconnect_dsa_head -#undef A_reselected_identify -#undef A_reselected_tag -#undef A_saved_dsa -#undef A_schedule -#undef A_test_dest -#undef A_test_src -#undef Ent_accept_message -#undef Ent_cmdout_cmdout -#undef Ent_command_complete -#undef Ent_command_complete_msgin -#undef Ent_data_transfer -#undef Ent_datain_to_jump -#undef Ent_debug_break -#undef Ent_dsa_code_begin -#undef Ent_dsa_code_check_reselect -#undef Ent_dsa_code_fix_jump -#undef Ent_dsa_code_restore_pointers -#undef Ent_dsa_code_save_data_pointer -#undef Ent_dsa_code_template -#undef Ent_dsa_code_template_end -#undef Ent_dsa_schedule -#undef Ent_dsa_zero -#undef Ent_end_data_transfer -#undef Ent_initiator_abort -#undef Ent_msg_in -#undef Ent_msg_in_restart -#undef Ent_other_in -#undef Ent_other_out -#undef Ent_other_transfer -#undef Ent_reject_message -#undef Ent_reselected_check_next -#undef Ent_reselected_ok -#undef Ent_respond_message -#undef Ent_select -#undef Ent_select_msgout -#undef Ent_target_abort -#undef Ent_test_1 -#undef Ent_test_2 -#undef Ent_test_2_msgout -#undef Ent_wait_reselect diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile index fc05d90229a..51cba91cd22 100644 --- a/drivers/scsi/Makefile +++ b/drivers/scsi/Makefile @@ -37,7 +37,6 @@ obj-$(CONFIG_SCSI_SAS_LIBSAS) += libsas/ obj-$(CONFIG_ISCSI_TCP) += libiscsi.o iscsi_tcp.o obj-$(CONFIG_INFINIBAND_ISER) += libiscsi.o -obj-$(CONFIG_SCSI_AMIGA7XX) += amiga7xx.o 53c7xx.o obj-$(CONFIG_A3000_SCSI) += a3000.o wd33c93.o obj-$(CONFIG_A2091_SCSI) += a2091.o wd33c93.o obj-$(CONFIG_GVP11_SCSI) += gvp11.o wd33c93.o @@ -53,8 +52,6 @@ obj-$(CONFIG_ATARI_SCSI) += atari_scsi.o obj-$(CONFIG_MAC_SCSI) += mac_scsi.o obj-$(CONFIG_SCSI_MAC_ESP) += mac_esp.o NCR53C9x.o obj-$(CONFIG_SUN3_SCSI) += sun3_scsi.o sun3_scsi_vme.o -obj-$(CONFIG_MVME16x_SCSI) += mvme16x.o 53c7xx.o -obj-$(CONFIG_BVME6000_SCSI) += bvme6000.o 53c7xx.o obj-$(CONFIG_SCSI_SIM710) += 53c700.o sim710.o obj-$(CONFIG_SCSI_ADVANSYS) += advansys.o obj-$(CONFIG_SCSI_PSI240I) += psi240i.o @@ -169,10 +166,8 @@ NCR_Q720_mod-objs := NCR_Q720.o ncr53c8xx.o oktagon_esp_mod-objs := oktagon_esp.o oktagon_io.o # Files generated that shall be removed upon make clean -clean-files := 53c7xx_d.h 53c700_d.h \ - 53c7xx_u.h 53c700_u.h +clean-files := 53c700_d.h 53c700_u.h -$(obj)/53c7xx.o: $(obj)/53c7xx_d.h $(obj)/53c7xx_u.h $(obj)/53c700.o $(MODVERDIR)/$(obj)/53c700.ver: $(obj)/53c700_d.h # If you want to play with the firmware, uncomment @@ -180,11 +175,6 @@ $(obj)/53c700.o $(MODVERDIR)/$(obj)/53c700.ver: $(obj)/53c700_d.h ifdef GENERATE_FIRMWARE -$(obj)/53c7xx_d.h: $(src)/53c7xx.scr $(src)/script_asm.pl - $(CPP) -traditional -DCHIP=710 - < $< | grep -v '^#' | $(PERL) -s $(src)/script_asm.pl -ncr7x0_family $@ $(@:_d.h=_u.h) - -$(obj)/53c7xx_u.h: $(obj)/53c7xx_d.h - $(obj)/53c700_d.h: $(src)/53c700.scr $(src)/script_asm.pl $(PERL) -s $(src)/script_asm.pl -ncr7x0_family $@ $(@:_d.h=_u.h) < $< diff --git a/drivers/scsi/amiga7xx.c b/drivers/scsi/amiga7xx.c deleted file mode 100644 index d5d3c4d5a25..00000000000 --- a/drivers/scsi/amiga7xx.c +++ /dev/null @@ -1,138 +0,0 @@ -/* - * Detection routine for the NCR53c710 based Amiga SCSI Controllers for Linux. - * Amiga MacroSystemUS WarpEngine SCSI controller. - * Amiga Technologies A4000T SCSI controller. - * Amiga Technologies/DKB A4091 SCSI controller. - * - * Written 1997 by Alan Hourihane <alanh@fairlite.demon.co.uk> - * plus modifications of the 53c7xx.c driver to support the Amiga. - */ -#include <linux/types.h> -#include <linux/mm.h> -#include <linux/blkdev.h> -#include <linux/zorro.h> -#include <linux/stat.h> - -#include <asm/setup.h> -#include <asm/page.h> -#include <asm/pgtable.h> -#include <asm/amigaints.h> -#include <asm/amigahw.h> -#include <asm/dma.h> -#include <asm/irq.h> - -#include "scsi.h" -#include <scsi/scsi_host.h> -#include "53c7xx.h" -#include "amiga7xx.h" - - -static int amiga7xx_register_one(struct scsi_host_template *tpnt, - unsigned long address) -{ - long long options; - int clock; - - if (!request_mem_region(address, 0x1000, "ncr53c710")) - return 0; - - address = (unsigned long)z_ioremap(address, 0x1000); - options = OPTION_MEMORY_MAPPED | OPTION_DEBUG_TEST1 | OPTION_INTFLY | - OPTION_SYNCHRONOUS | OPTION_ALWAYS_SYNCHRONOUS | - OPTION_DISCONNECT; - clock = 50000000; /* 50 MHz SCSI Clock */ - ncr53c7xx_init(tpnt, 0, 710, address, 0, IRQ_AMIGA_PORTS, DMA_NONE, - options, clock); - return 1; -} - - -#ifdef CONFIG_ZORRO - -static struct { - zorro_id id; - unsigned long offset; - int absolute; /* offset is absolute address */ -} amiga7xx_table[] = { - { .id = ZORRO_PROD_PHASE5_BLIZZARD_603E_PLUS, .offset = 0xf40000, - .absolute = 1 }, - { .id = ZORRO_PROD_MACROSYSTEMS_WARP_ENGINE_40xx, .offset = 0x40000 }, - { .id = ZORRO_PROD_CBM_A4091_1, .offset = 0x800000 }, - { .id = ZORRO_PROD_CBM_A4091_2, .offset = 0x800000 }, - { .id = ZORRO_PROD_GVP_GFORCE_040_060, .offset = 0x40000 }, - { 0 } -}; - -static int __init amiga7xx_zorro_detect(struct scsi_host_template *tpnt) -{ - int num = 0, i; - struct zorro_dev *z = NULL; - unsigned long address; - - while ((z = zorro_find_device(ZORRO_WILDCARD, z))) { - for (i = 0; amiga7xx_table[i].id; i++) - if (z->id == amiga7xx_table[i].id) - break; - if (!amiga7xx_table[i].id) - continue; - if (amiga7xx_table[i].absolute) - address = amiga7xx_table[i].offset; - else - address = z->resource.start + amiga7xx_table[i].offset; - num += amiga7xx_register_one(tpnt, address); - } - return num; -} - -#endif /* CONFIG_ZORRO */ - - -int __init amiga7xx_detect(struct scsi_host_template *tpnt) -{ - static unsigned char called = 0; - int num = 0; - - if (called || !MACH_IS_AMIGA) - return 0; - - tpnt->proc_name = "Amiga7xx"; - - if (AMIGAHW_PRESENT(A4000_SCSI)) - num += amiga7xx_register_one(tpnt, 0xdd0040); - -#ifdef CONFIG_ZORRO - num += amiga7xx_zorro_detect(tpnt); -#endif - - called = 1; - return num; -} - -static int amiga7xx_release(struct Scsi_Host *shost) -{ - if (shost->irq) - free_irq(shost->irq, NULL); - if (shost->dma_channel != 0xff) - free_dma(shost->dma_channel); - if (shost->io_port && shost->n_io_port) - release_region(shost->io_port, shost->n_io_port); - scsi_unregister(shost); - return 0; -} - -static struct scsi_host_template driver_template = { - .name = "Amiga NCR53c710 SCSI", - .detect = amiga7xx_detect, - .release = amiga7xx_release, - .queuecommand = NCR53c7xx_queue_command, - .abort = NCR53c7xx_abort, - .reset = NCR53c7xx_reset, - .can_queue = 24, - .this_id = 7, - .sg_tablesize = 63, - .cmd_per_lun = 3, - .use_clustering = DISABLE_CLUSTERING -}; - - -#include "scsi_module.c" diff --git a/drivers/scsi/amiga7xx.h b/drivers/scsi/amiga7xx.h deleted file mode 100644 index 7cd63a99688..00000000000 --- a/drivers/scsi/amiga7xx.h +++ /dev/null @@ -1,23 +0,0 @@ -#ifndef AMIGA7XX_H - -#include <linux/types.h> - -int amiga7xx_detect(struct scsi_host_template *); -const char *NCR53c7x0_info(void); -int NCR53c7xx_queue_command(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *)); -int NCR53c7xx_abort(Scsi_Cmnd *); -int NCR53c7x0_release (struct Scsi_Host *); -int NCR53c7xx_reset(Scsi_Cmnd *, unsigned int); -void NCR53c7x0_intr(int irq, void *dev_id); - -#ifndef CMD_PER_LUN -#define CMD_PER_LUN 3 -#endif - -#ifndef CAN_QUEUE -#define CAN_QUEUE 24 -#endif - -#include <scsi/scsicam.h> - -#endif /* AMIGA7XX_H */ diff --git a/drivers/scsi/bvme6000.c b/drivers/scsi/bvme6000.c deleted file mode 100644 index 599b400a3c4..00000000000 --- a/drivers/scsi/bvme6000.c +++ /dev/null @@ -1,76 +0,0 @@ -/* - * Detection routine for the NCR53c710 based BVME6000 SCSI Controllers for Linux. - * - * Based on work by Alan Hourihane - */ -#include <linux/types.h> -#include <linux/mm.h> -#include <linux/blkdev.h> -#include <linux/zorro.h> - -#include <asm/setup.h> -#include <asm/page.h> -#include <asm/pgtable.h> -#include <asm/bvme6000hw.h> -#include <asm/irq.h> - -#include "scsi.h" -#include <scsi/scsi_host.h> -#include "53c7xx.h" -#include "bvme6000.h" - -#include<linux/stat.h> - - -int bvme6000_scsi_detect(struct scsi_host_template *tpnt) -{ - static unsigned char called = 0; - int clock; - long long options; - - if (called) - return 0; - if (!MACH_IS_BVME6000) - return 0; - - tpnt->proc_name = "BVME6000"; - - options = OPTION_MEMORY_MAPPED|OPTION_DEBUG_TEST1|OPTION_INTFLY|OPTION_SYNCHRONOUS|OPTION_ALWAYS_SYNCHRONOUS|OPTION_DISCONNECT; - - clock = 40000000; /* 66MHz SCSI Clock */ - - ncr53c7xx_init(tpnt, 0, 710, (unsigned long)BVME_NCR53C710_BASE, - 0, BVME_IRQ_SCSI, DMA_NONE, - options, clock); - called = 1; - return 1; -} - -static int bvme6000_scsi_release(struct Scsi_Host *shost) -{ - if (shost->irq) - free_irq(shost->irq, NULL); - if (shost->dma_channel != 0xff) - free_dma(shost->dma_channel); - if (shost->io_port && shost->n_io_port) - release_region(shost->io_port, shost->n_io_port); - scsi_unregister(shost); - return 0; -} - -static struct scsi_host_template driver_template = { - .name = "BVME6000 NCR53c710 SCSI", - .detect = bvme6000_scsi_detect, - .release = bvme6000_scsi_release, - .queuecommand = NCR53c7xx_queue_command, - .abort = NCR53c7xx_abort, - .reset = NCR53c7xx_reset, - .can_queue = 24, - .this_id = 7, - .sg_tablesize = 63, - .cmd_per_lun = 3, - .use_clustering = DISABLE_CLUSTERING -}; - - -#include "scsi_module.c" diff --git a/drivers/scsi/bvme6000.h b/drivers/scsi/bvme6000.h deleted file mode 100644 index ea3e4b2b922..00000000000 --- a/drivers/scsi/bvme6000.h +++ /dev/null @@ -1,24 +0,0 @@ -#ifndef BVME6000_SCSI_H -#define BVME6000_SCSI_H - -#include <linux/types.h> - -int bvme6000_scsi_detect(struct scsi_host_template *); -const char *NCR53c7x0_info(void); -int NCR53c7xx_queue_command(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *)); -int NCR53c7xx_abort(Scsi_Cmnd *); -int NCR53c7x0_release (struct Scsi_Host *); -int NCR53c7xx_reset(Scsi_Cmnd *, unsigned int); -void NCR53c7x0_intr(int irq, void *dev_id); - -#ifndef CMD_PER_LUN -#define CMD_PER_LUN 3 -#endif - -#ifndef CAN_QUEUE -#define CAN_QUEUE 24 -#endif - -#include <scsi/scsicam.h> - -#endif /* BVME6000_SCSI_H */ diff --git a/drivers/scsi/mvme16x.c b/drivers/scsi/mvme16x.c deleted file mode 100644 index 575fe6f7e0e..00000000000 --- a/drivers/scsi/mvme16x.c +++ /dev/null @@ -1,78 +0,0 @@ -/* - * Detection routine for the NCR53c710 based MVME16x SCSI Controllers for Linux. - * - * Based on work by Alan Hourihane - */ -#include <linux/types.h> -#include <linux/mm.h> -#include <linux/blkdev.h> - -#include <asm/page.h> -#include <asm/pgtable.h> -#include <asm/mvme16xhw.h> -#include <asm/irq.h> - -#include "scsi.h" -#include <scsi/scsi_host.h> -#include "53c7xx.h" -#include "mvme16x.h" - -#include<linux/stat.h> - - -int mvme16x_scsi_detect(struct scsi_host_template *tpnt) -{ - static unsigned char called = 0; - int clock; - long long options; - - if (!MACH_IS_MVME16x) - return 0; - if (mvme16x_config & MVME16x_CONFIG_NO_SCSICHIP) { - printk ("SCSI detection disabled, SCSI chip not present\n"); - return 0; - } - if (called) - return 0; - - tpnt->proc_name = "MVME16x"; - - options = OPTION_MEMORY_MAPPED|OPTION_DEBUG_TEST1|OPTION_INTFLY|OPTION_SYNCHRONOUS|OPTION_ALWAYS_SYNCHRONOUS|OPTION_DISCONNECT; - - clock = 66000000; /* 66MHz SCSI Clock */ - - ncr53c7xx_init(tpnt, 0, 710, (unsigned long)0xfff47000, - 0, MVME16x_IRQ_SCSI, DMA_NONE, - options, clock); - called = 1; - return 1; -} - -static int mvme16x_scsi_release(struct Scsi_Host *shost) -{ - if (shost->irq) - free_irq(shost->irq, NULL); - if (shost->dma_channel != 0xff) - free_dma(shost->dma_channel); - if (shost->io_port && shost->n_io_port) - release_region(shost->io_port, shost->n_io_port); - scsi_unregister(shost); - return 0; -} - -static struct scsi_host_template driver_template = { - .name = "MVME16x NCR53c710 SCSI", - .detect = mvme16x_scsi_detect, - .release = mvme16x_scsi_release, - .queuecommand = NCR53c7xx_queue_command, - .abort = NCR53c7xx_abort, - .reset = NCR53c7xx_reset, - .can_queue = 24, - .this_id = 7, - .sg_tablesize = 63, - .cmd_per_lun = 3, - .use_clustering = DISABLE_CLUSTERING -}; - - -#include "scsi_module.c" diff --git a/drivers/scsi/mvme16x.h b/drivers/scsi/mvme16x.h deleted file mode 100644 index 73e33b37a3f..00000000000 --- a/drivers/scsi/mvme16x.h +++ /dev/null @@ -1,24 +0,0 @@ -#ifndef MVME16x_SCSI_H -#define MVME16x_SCSI_H - -#include <linux/types.h> - -int mvme16x_scsi_detect(struct scsi_host_template *); -const char *NCR53c7x0_info(void); -int NCR53c7xx_queue_command(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *)); -int NCR53c7xx_abort(Scsi_Cmnd *); -int NCR53c7x0_release (struct Scsi_Host *); -int NCR53c7xx_reset(Scsi_Cmnd *, unsigned int); -void NCR53c7x0_intr(int irq, void *dev_id); - -#ifndef CMD_PER_LUN -#define CMD_PER_LUN 3 -#endif - -#ifndef CAN_QUEUE -#define CAN_QUEUE 24 -#endif - -#include <scsi/scsicam.h> - -#endif /* MVME16x_SCSI_H */ |