diff options
Diffstat (limited to 'drivers/net/atari_pamsnet.c')
| -rw-r--r-- | drivers/net/atari_pamsnet.c | 896 |
1 files changed, 0 insertions, 896 deletions
diff --git a/drivers/net/atari_pamsnet.c b/drivers/net/atari_pamsnet.c deleted file mode 100644 index 54714409a09..00000000000 --- a/drivers/net/atari_pamsnet.c +++ /dev/null @@ -1,896 +0,0 @@ -/* atari_pamsnet.c PAMsNet device driver for linux68k. - * - * Version: @(#)PAMsNet.c 0.2ß 03/31/96 - * - * Author: Torsten Lang <Torsten.Lang@ap.physik.uni-giessen.de> - * <Torsten.Lang@jung.de> - * - * This driver is based on my driver PAMSDMA.c for MiNT-Net and - * on the driver bionet.c written by - * Hartmut Laue <laue@ifk-mp.uni-kiel.de> - * and Torsten Narjes <narjes@ifk-mp.uni-kiel.de> - * - * Little adaptions for integration into pl7 by Roman Hodek - * - What is it ? - ------------ - This driver controls the PAMsNet LAN-Adapter which connects - an ATARI ST/TT via the ACSI-port to an Ethernet-based network. - - This version can be compiled as a loadable module (See the - compile command at the bottom of this file). - At load time, you can optionally set the debugging level and the - fastest response time on the command line of 'insmod'. - - 'pamsnet_debug' - controls the amount of diagnostic messages: - 0 : no messages - >0 : see code for meaning of printed messages - - 'pamsnet_min_poll_time' (always >=1) - gives the time (in jiffies) between polls. Low values - increase the system load (beware!) - - When loaded, a net device with the name 'eth?' becomes available, - which can be controlled with the usual 'ifconfig' command. - - It is possible to compile this driver into the kernel like other - (net) drivers. For this purpose, some source files (e.g. config-files - makefiles, Space.c) must be changed accordingly. (You may refer to - other drivers how to do it.) In this case, the device will be detected - at boot time and (probably) appear as 'eth0'. - - Theory of Operation - ------------------- - Because the ATARI DMA port is usually shared between several - devices (eg. harddisk, floppy) we cannot block the ACSI bus - while waiting for interrupts. Therefore we use a polling mechanism - to fetch packets from the adapter. For the same reason, we send - packets without checking that the previous packet has been sent to - the LAN. We rely on the higher levels of the networking code to detect - missing packets and resend them. - - Before we access the ATARI DMA controller, we check if another - process is using the DMA. If not, we lock the DMA, perform one or - more packet transfers and unlock the DMA before returning. - We do not use 'stdma_lock' unconditionally because it is unclear - if the networking code can be set to sleep, which will happen if - another (possibly slow) device is using the DMA controller. - - The polling is done via timer interrupts which periodically - 'simulate' an interrupt from the Ethernet adapter. The time (in jiffies) - between polls varies depending on an estimate of the net activity. - The allowed range is given by the variable 'bionet_min_poll_time' - for the lower (fastest) limit and the constant 'MAX_POLL_TIME' - for the higher (slowest) limit. - - Whenever a packet arrives, we switch to fastest response by setting - the polling time to its lowest limit. If the following poll fails, - because no packets have arrived, we increase the time for the next - poll. When the net activity is low, the polling time effectively - stays at its maximum value, resulting in the lowest load for the - machine. - */ - -#define MAX_POLL_TIME 10 - -static char *version = - "pamsnet.c:v0.2beta 30-mar-96 (c) Torsten Lang.\n"; - -#include <linux/module.h> - -#include <linux/kernel.h> -#include <linux/jiffies.h> -#include <linux/types.h> -#include <linux/fcntl.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> -#include <linux/in.h> -#include <linux/slab.h> -#include <linux/string.h> -#include <linux/bitops.h> -#include <asm/system.h> -#include <asm/pgtable.h> -#include <asm/io.h> -#include <asm/dma.h> -#include <linux/errno.h> -#include <asm/atarihw.h> -#include <asm/atariints.h> -#include <asm/atari_stdma.h> -#include <asm/atari_acsi.h> - -#include <linux/delay.h> -#include <linux/timer.h> -#include <linux/init.h> - -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/skbuff.h> - -#undef READ -#undef WRITE - -/* use 0 for production, 1 for verification, >2 for debug - */ -#ifndef NET_DEBUG -#define NET_DEBUG 0 -#endif -/* - * Global variable 'pamsnet_debug'. Can be set at load time by 'insmod' - */ -unsigned int pamsnet_debug = NET_DEBUG; -module_param(pamsnet_debug, int, 0); -MODULE_PARM_DESC(pamsnet_debug, "pamsnet debug enable (0-1)"); -MODULE_LICENSE("GPL"); - -static unsigned int pamsnet_min_poll_time = 2; - - -/* Information that need to be kept for each board. - */ -struct net_local { - struct net_device_stats stats; - long open_time; /* for debugging */ - int poll_time; /* polling time varies with net load */ -}; - -static struct nic_pkt_s { /* packet format */ - unsigned char buffer[2048]; -} *nic_packet = 0; -unsigned char *phys_nic_packet; - -typedef unsigned char HADDR[6]; /* 6-byte hardware address of lance */ - -/* Index to functions, as function prototypes. - */ -static void start (int target); -static int stop (int target); -static int testpkt (int target); -static int sendpkt (int target, unsigned char *buffer, int length); -static int receivepkt (int target, unsigned char *buffer); -static int inquiry (int target, unsigned char *buffer); -static HADDR *read_hw_addr(int target, unsigned char *buffer); -static void setup_dma (void *address, unsigned rw_flag, int num_blocks); -static int send_first (int target, unsigned char byte); -static int send_1_5 (int lun, unsigned char *command, int dma); -static int get_status (void); -static int calc_received (void *start_address); - -static int pamsnet_open(struct net_device *dev); -static int pamsnet_send_packet(struct sk_buff *skb, struct net_device *dev); -static void pamsnet_poll_rx(struct net_device *); -static int pamsnet_close(struct net_device *dev); -static struct net_device_stats *net_get_stats(struct net_device *dev); -static void pamsnet_tick(unsigned long); - -static irqreturn_t pamsnet_intr(int irq, void *data); - -static DEFINE_TIMER(pamsnet_timer, pamsnet_tick, 0, 0); - -#define STRAM_ADDR(a) (((a) & 0xff000000) == 0) - -typedef struct -{ - unsigned char reserved1[0x38]; - HADDR hwaddr; - unsigned char reserved2[0x1c2]; -} DMAHWADDR; - -/* - * Definitions of commands understood by the PAMs DMA adaptor. - * - * In general the DMA adaptor uses LUN 0, 5, 6 and 7 on one ID changeable - * by the PAM's Net software. - * - * LUN 0 works as a harddisk. You can boot the PAM's Net driver there. - * LUN 5 works as a harddisk and lets you access the RAM and some I/O HW - * area. In sector 0, bytes 0x38-0x3d you find the ethernet HW address - * of the adaptor. - * LUN 6 works as a harddisk and lets you access the firmware ROM. - * LUN 7 lets you send and receive packets. - * - * Some commands like the INQUIRY command work identical on all used LUNs. - * - * UNKNOWN1 seems to read some data. - * Command length is 6 bytes. - * UNKNOWN2 seems to read some data (command byte 1 must be !=0). The - * following bytes seem to be something like an allocation length. - * Command length is 6 bytes. - * READPKT reads a packet received by the DMA adaptor. - * Command length is 6 bytes. - * WRITEPKT sends a packet transferred by the following DMA phase. The length - * of the packet is transferred in command bytes 3 and 4. - * The adaptor automatically replaces the src hw address in an ethernet - * packet by its own hw address. - * Command length is 6 bytes. - * INQUIRY has the same function as the INQUIRY command supported by harddisks - * and other SCSI devices. It lets you detect which device you found - * at a given address. - * Command length is 6 bytes. - * START initializes the DMA adaptor. After this command it is able to send - * and receive packets. There is no status byte returned! - * Command length is 1 byte. - * NUMPKTS gives back the number of received packets waiting in the queue in - * the status byte. - * Command length is 1 byte. - * UNKNOWN3 - * UNKNOWN4 Function of these three commands is unknown. - * UNKNOWN5 The command length of these three commands is 1 byte. - * DESELECT immediately deselects the DMA adaptor. May important with interrupt - * driven operation. - * Command length is 1 byte. - * STOP resets the DMA adaptor. After this command packets can no longer - * be received or transferred. - * Command length is 6 byte. - */ - -enum {UNKNOWN1=3, READPKT=8, UNKNOWN2, WRITEPKT=10, INQUIRY=18, START, - NUMPKTS=22, UNKNOWN3, UNKNOWN4, UNKNOWN5, DESELECT, STOP}; - -#define READSECTOR READPKT -#define WRITESECTOR WRITEPKT - -u_char *inquire8="MV PAM's NET/GK"; - -#define DMALOW dma_wd.dma_lo -#define DMAMID dma_wd.dma_md -#define DMAHIGH dma_wd.dma_hi -#define DACCESS dma_wd.fdc_acces_seccount - -#define MFP_GPIP mfp.par_dt_reg - -/* Some useful functions */ - -#define INT (!(MFP_GPIP & 0x20)) -#define DELAY ({MFP_GPIP; MFP_GPIP; MFP_GPIP;}) -#define WRITEMODE(value) \ - ({ u_short dummy = value; \ - __asm__ volatile("movew %0, 0xFFFF8606" : : "d"(dummy)); \ - DELAY; \ - }) -#define WRITEBOTH(value1, value2) \ - ({ u_long dummy = (u_long)(value1)<<16 | (u_short)(value2); \ - __asm__ volatile("movel %0, 0xFFFF8604" : : "d"(dummy)); \ - DELAY; \ - }) - -/* Definitions for DMODE */ - -#define READ 0x000 -#define WRITE 0x100 - -#define DMA_FDC 0x080 -#define DMA_ACSI 0x000 - -#define DMA_DISABLE 0x040 - -#define SEC_COUNT 0x010 -#define DMA_WINDOW 0x000 - -#define REG_ACSI 0x008 -#define REG_FDC 0x000 - -#define A1 0x002 - -/* Timeout constants */ - -#define TIMEOUTCMD HZ/2 /* ca. 500ms */ -#define TIMEOUTDMA HZ /* ca. 1s */ -#define COMMAND_DELAY 500 /* ca. 0.5ms */ - -unsigned rw; -int lance_target = -1; -int if_up = 0; - -/* The following routines access the ethernet board connected to the - * ACSI port via the st_dma chip. - */ - -/* The following lowlevel routines work on physical addresses only and assume - * that eventually needed buffers are - * - completely located in ST RAM - * - are contigous in the physical address space - */ - -/* Setup the DMA counter */ - -static void -setup_dma (address, rw_flag, num_blocks) - void *address; - unsigned rw_flag; - int num_blocks; -{ - WRITEMODE((unsigned) rw_flag | DMA_FDC | SEC_COUNT | REG_ACSI | - A1); - WRITEMODE((unsigned)(rw_flag ^ WRITE) | DMA_FDC | SEC_COUNT | REG_ACSI | - A1); - WRITEMODE((unsigned) rw_flag | DMA_FDC | SEC_COUNT | REG_ACSI | - A1); - DMALOW = (unsigned char)((unsigned long)address & 0xFF); - DMAMID = (unsigned char)(((unsigned long)address >> 8) & 0xFF); - DMAHIGH = (unsigned char)(((unsigned long)address >> 16) & 0xFF); - WRITEBOTH((unsigned)num_blocks & 0xFF, - rw_flag | DMA_FDC | DMA_WINDOW | REG_ACSI | A1); - rw = rw_flag; -} - -/* Send the first byte of an command block */ - -static int -send_first (target, byte) - int target; - unsigned char byte; -{ - rw = READ; - acsi_delay_end(COMMAND_DELAY); - /* - * wake up ACSI - */ - WRITEMODE(DMA_FDC | DMA_WINDOW | REG_ACSI); - /* - * write command byte - */ - WRITEBOTH((target << 5) | (byte & 0x1F), DMA_FDC | - DMA_WINDOW | REG_ACSI | A1); - return (!acsi_wait_for_IRQ(TIMEOUTCMD)); -} - -/* Send the rest of an command block */ - -static int -send_1_5 (lun, command, dma) - int lun; - unsigned char *command; - int dma; -{ - int i, j; - - for (i=0; i<5; i++) { - WRITEBOTH((!i ? (((lun & 0x7) << 5) | (command[i] & 0x1F)) - : command[i]), - rw | REG_ACSI | DMA_WINDOW | - ((i < 4) ? DMA_FDC - : (dma ? DMA_ACSI - : DMA_FDC)) | A1); - if (i < 4 && (j = !acsi_wait_for_IRQ(TIMEOUTCMD))) - return (j); - } - return (0); -} - -/* Read a status byte */ - -static int -get_status (void) -{ - WRITEMODE(DMA_FDC | DMA_WINDOW | REG_ACSI | A1); - acsi_delay_start(); - return ((int)(DACCESS & 0xFF)); -} - -/* Calculate the number of received bytes */ - -static int -calc_received (start_address) - void *start_address; -{ - return (int)( - (((unsigned long)DMAHIGH << 16) | ((unsigned)DMAMID << 8) | DMALOW) - - (unsigned long)start_address); -} - -/* The following midlevel routines still work on physical addresses ... */ - -/* start() starts the PAM's DMA adaptor */ - -static void -start (target) - int target; -{ - send_first(target, START); -} - -/* stop() stops the PAM's DMA adaptor and returns a value of zero in case of success */ - -static int -stop (target) - int target; -{ - int ret = -1; - unsigned char cmd_buffer[5]; - - if (send_first(target, STOP)) - goto bad; - cmd_buffer[0] = cmd_buffer[1] = cmd_buffer[2] = - cmd_buffer[3] = cmd_buffer[4] = 0; - if (send_1_5(7, cmd_buffer, 0) || - !acsi_wait_for_IRQ(TIMEOUTDMA) || - get_status()) - goto bad; - ret = 0; -bad: - return (ret); -} - -/* testpkt() returns the number of received packets waiting in the queue */ - -static int -testpkt(target) - int target; -{ - int ret = -1; - - if (send_first(target, NUMPKTS)) - goto bad; - ret = get_status(); -bad: - return (ret); -} - -/* inquiry() returns 0 when PAM's DMA found, -1 when timeout, -2 otherwise */ -/* Please note: The buffer is for internal use only but must be defined! */ - -static int -inquiry (target, buffer) - int target; - unsigned char *buffer; -{ - int ret = -1; - unsigned char *vbuffer = phys_to_virt((unsigned long)buffer); - unsigned char cmd_buffer[5]; - - if (send_first(target, INQUIRY)) - goto bad; - setup_dma(buffer, READ, 1); - vbuffer[8] = vbuffer[27] = 0; /* Avoid confusion with previous read data */ - cmd_buffer[0] = cmd_buffer[1] = cmd_buffer[2] = cmd_buffer[4] = 0; - cmd_buffer[3] = 48; - if (send_1_5(5, cmd_buffer, 1) || - !acsi_wait_for_IRQ(TIMEOUTDMA) || - get_status() || - (calc_received(buffer) < 32)) - goto bad; - dma_cache_maintenance((unsigned long)(buffer+8), 20, 0); - if (memcmp(inquire8, vbuffer+8, 20)) - goto bad; - ret = 0; -bad: - if (!!NET_DEBUG) { - vbuffer[8+20]=0; - printk("inquiry of target %d: %s\n", target, vbuffer+8); - } - return (ret); -} - -/* - * read_hw_addr() reads the sector containing the hwaddr and returns - * a pointer to it (virtual address!) or 0 in case of an error - */ - -static HADDR -*read_hw_addr(target, buffer) - int target; - unsigned char *buffer; -{ - HADDR *ret = 0; - unsigned char cmd_buffer[5]; - - if (send_first(target, READSECTOR)) - goto bad; - setup_dma(buffer, READ, 1); - cmd_buffer[0] = cmd_buffer[1] = cmd_buffer[2] = cmd_buffer[4] = 0; - cmd_buffer[3] = 1; - if (send_1_5(5, cmd_buffer, 1) || - !acsi_wait_for_IRQ(TIMEOUTDMA) || - get_status()) - goto bad; - ret = phys_to_virt((unsigned long)&(((DMAHWADDR *)buffer)->hwaddr)); - dma_cache_maintenance((unsigned long)buffer, 512, 0); -bad: - return (ret); -} - -static irqreturn_t -pamsnet_intr(irq, data, fp) - int irq; - void *data; -{ - return IRQ_HANDLED; -} - -/* receivepkt() loads a packet to a given buffer and returns its length */ - -static int -receivepkt (target, buffer) - int target; - unsigned char *buffer; -{ - int ret = -1; - unsigned char cmd_buffer[5]; - - if (send_first(target, READPKT)) - goto bad; - setup_dma(buffer, READ, 3); - cmd_buffer[0] = cmd_buffer[1] = cmd_buffer[2] = cmd_buffer[4] = 0; - cmd_buffer[3] = 3; - if (send_1_5(7, cmd_buffer, 1) || - !acsi_wait_for_IRQ(TIMEOUTDMA) || - get_status()) - goto bad; - ret = calc_received(buffer); -bad: - return (ret); -} - -/* sendpkt() sends a packet and returns a value of zero when the packet was sent - successfully */ - -static int -sendpkt (target, buffer, length) - int target; - unsigned char *buffer; - int length; -{ - int ret = -1; - unsigned char cmd_buffer[5]; - - if (send_first(target, WRITEPKT)) - goto bad; - setup_dma(buffer, WRITE, 3); - cmd_buffer[0] = cmd_buffer[1] = cmd_buffer[4] = 0; - cmd_buffer[2] = length >> 8; - cmd_buffer[3] = length & 0xFF; - if (send_1_5(7, cmd_buffer, 1) || - !acsi_wait_for_IRQ(TIMEOUTDMA) || - get_status()) - goto bad; - ret = 0; -bad: - return (ret); -} - -/* The following higher level routines work on virtual addresses and convert them to - * physical addresses when passed to the lowlevel routines. It's up to the higher level - * routines to copy data from Alternate RAM to ST RAM if neccesary! - */ - -/* Check for a network adaptor of this type, and return '0' if one exists. - */ - -struct net_device * __init pamsnet_probe (int unit) -{ - struct net_device *dev; - int i; - HADDR *hwaddr; - int err; - - unsigned char station_addr[6]; - static unsigned version_printed; - /* avoid "Probing for..." printed 4 times - the driver is supporting only one adapter now! */ - static int no_more_found; - - if (no_more_found) - return ERR_PTR(-ENODEV); - no_more_found = 1; - - dev = alloc_etherdev(sizeof(struct net_local)); - if (!dev) - return ERR_PTR(-ENOMEM); - if (unit >= 0) { - sprintf(dev->name, "eth%d", unit); - netdev_boot_setup_check(dev); - } - SET_MODULE_OWNER(dev); - - printk("Probing for PAM's Net/GK Adapter...\n"); - - /* Allocate the DMA buffer here since we need it for probing! */ - - nic_packet = (struct nic_pkt_s *)acsi_buffer; - phys_nic_packet = (unsigned char *)phys_acsi_buffer; - if (pamsnet_debug > 0) { - printk("nic_packet at 0x%p, phys at 0x%p\n", - nic_packet, phys_nic_packet ); - } - - stdma_lock(pamsnet_intr, NULL); - DISABLE_IRQ(); - - for (i=0; i<8; i++) { - /* Do two inquiries to cover cases with strange equipment on previous ID */ - /* blocking the ACSI bus (like the SLMC804 laser printer controller... */ - inquiry(i, phys_nic_packet); - if (!inquiry(i, phys_nic_packet)) { - lance_target = i; - break; - } - } - - if (!!NET_DEBUG) - printk("ID: %d\n",i); - - if (lance_target >= 0) { - if (!(hwaddr = read_hw_addr(lance_target, phys_nic_packet))) - lance_target = -1; - else - memcpy (station_addr, hwaddr, ETH_ALEN); - } - - ENABLE_IRQ(); - stdma_release(); - - if (lance_target < 0) { - printk("No PAM's Net/GK found.\n"); - free_netdev(dev); - return ERR_PTR(-ENODEV); - } - - if (pamsnet_debug > 0 && version_printed++ == 0) - printk(version); - - printk("%s: %s found on target %01d, eth-addr: %02x:%02x:%02x:%02x:%02x:%02x.\n", - dev->name, "PAM's Net/GK", lance_target, - station_addr[0], station_addr[1], station_addr[2], - station_addr[3], station_addr[4], station_addr[5]); - - /* Initialize the device structure. */ - dev->open = pamsnet_open; - dev->stop = pamsnet_close; - dev->hard_start_xmit = pamsnet_send_packet; - dev->get_stats = net_get_stats; - - /* Fill in the fields of the device structure with ethernet-generic - * values. This should be in a common file instead of per-driver. - */ - - for (i = 0; i < ETH_ALEN; i++) { -#if 0 - dev->broadcast[i] = 0xff; -#endif - dev->dev_addr[i] = station_addr[i]; - } - err = register_netdev(dev); - if (!err) - return dev; - - free_netdev(dev); - return ERR_PTR(err); -} - -/* Open/initialize the board. This is called (in the current kernel) - sometime after booting when the 'ifconfig' program is run. - - This routine should set everything up anew at each open, even - registers that "should" only need to be set once at boot, so that - there is non-reboot way to recover if something goes wrong. - */ -static int -pamsnet_open(struct net_device *dev) { - struct net_local *lp = netdev_priv(dev); - - if (pamsnet_debug > 0) - printk("pamsnet_open\n"); - stdma_lock(pamsnet_intr, NULL); - DISABLE_IRQ(); - - /* Reset the hardware here. - */ - if (!if_up) - start(lance_target); - if_up = 1; - lp->open_time = 0; /*jiffies*/ - lp->poll_time = MAX_POLL_TIME; - - dev->tbusy = 0; - dev->interrupt = 0; - dev->start = 1; - - ENABLE_IRQ(); - stdma_release(); - pamsnet_timer.data = (long)dev; - pamsnet_timer.expires = jiffies + lp->poll_time; - add_timer(&pamsnet_timer); - return 0; -} - -static int -pamsnet_send_packet(struct sk_buff *skb, struct net_device *dev) { - struct net_local *lp = netdev_priv(dev); - unsigned long flags; - - /* Block a timer-based transmit from overlapping. This could better be - * done with atomic_swap(1, dev->tbusy), but set_bit() works as well. - */ - local_irq_save(flags); - - if (stdma_islocked()) { - local_irq_restore(flags); - lp->stats.tx_errors++; - } - else { - int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; - unsigned long buf = virt_to_phys(skb->data); - int stat; - - stdma_lock(pamsnet_intr, NULL); - DISABLE_IRQ(); - - local_irq_restore(flags); - if( !STRAM_ADDR(buf+length-1) ) { - skb_copy_from_linear_data(skb, nic_packet->buffer, - length); - buf = (unsigned long)phys_nic_packet; - } - - dma_cache_maintenance(buf, length, 1); - - stat = sendpkt(lance_target, (unsigned char *)buf, length); - ENABLE_IRQ(); - stdma_release(); - - dev->trans_start = jiffies; - dev->tbusy = 0; - lp->stats.tx_packets++; - lp->stats.tx_bytes+=length; - } - dev_kfree_skb(skb); - - return 0; -} - -/* We have a good packet(s), get it/them out of the buffers. - */ -static void -pamsnet_poll_rx(struct net_device *dev) { - struct net_local *lp = netdev_priv(dev); - int boguscount; - int pkt_len; - struct sk_buff *skb; - unsigned long flags; - - local_irq_save(flags); - /* ++roman: Take care at locking the ST-DMA... This must be done with ints - * off, since otherwise an int could slip in between the question and the - * locking itself, and then we'd go to sleep... And locking itself is - * necessary to keep the floppy_change timer from working with ST-DMA - * registers. */ - if (stdma_islocked()) { - local_irq_restore(flags); - return; - } - stdma_lock(pamsnet_intr, NULL); - DISABLE_IRQ(); - local_irq_restore(flags); - - boguscount = testpkt(lance_target); - if( lp->poll_time < MAX_POLL_TIME ) lp->poll_time++; - - while(boguscount--) { - pkt_len = receivepkt(lance_target, phys_nic_packet); - - if( pkt_len < 60 ) break; - - /* Good packet... */ - - dma_cache_maintenance((unsigned long)phys_nic_packet, pkt_len, 0); - - lp->poll_time = pamsnet_min_poll_time; /* fast poll */ - if( pkt_len >= 60 && pkt_len <= 2048 ) { - if (pkt_len > 1514) - pkt_len = 1514; - - /* Malloc up new buffer. - */ - skb = alloc_skb(pkt_len, GFP_ATOMIC); - if (skb == NULL) { - printk("%s: Memory squeeze, dropping packet.\n", - dev->name); - lp->stats.rx_dropped++; - break; - } - skb->len = pkt_len; - skb->dev = dev; - - /* 'skb->data' points to the start of sk_buff data area. - */ - skb_copy_to_linear_data(skb, nic_packet->buffer, - pkt_len); - netif_rx(skb); - dev->last_rx = jiffies; - lp->stats.rx_packets++; - lp->stats.rx_bytes+=pkt_len; - } - } - - /* If any worth-while packets have been received, dev_rint() - has done a mark_bh(INET_BH) for us and will work on them - when we get to the bottom-half routine. - */ - - ENABLE_IRQ(); - stdma_release(); - return; -} - -/* pamsnet_tick: called by pamsnet_timer. Reads packets from the adapter, - * passes them to the higher layers and restarts the timer. - */ -static void -pamsnet_tick(unsigned long data) { - struct net_device *dev = (struct net_device *)data; - struct net_local *lp = netdev_priv(dev); - - if( pamsnet_debug > 0 && (lp->open_time++ & 7) == 8 ) - printk("pamsnet_tick: %ld\n", lp->open_time); - - pamsnet_poll_rx(dev); - - pamsnet_timer.expires = jiffies + lp->poll_time; - add_timer(&pamsnet_timer); -} - -/* The inverse routine to pamsnet_open(). - */ -static int -pamsnet_close(struct net_device *dev) { - struct net_local *lp = netdev_priv(dev); - - if (pamsnet_debug > 0) - printk("pamsnet_close, open_time=%ld\n", lp->open_time); - del_timer(&pamsnet_timer); - stdma_lock(pamsnet_intr, NULL); - DISABLE_IRQ(); - - if (if_up) - stop(lance_target); - if_up = 0; - - lp->open_time = 0; - - dev->tbusy = 1; - dev->start = 0; - - ENABLE_IRQ(); - stdma_release(); - return 0; -} - -/* Get the current statistics. - This may be called with the card open or closed. - */ -static struct net_device_stats *net_get_stats(struct net_device *dev) -{ - struct net_local *lp = netdev_priv(dev); - return &lp->stats; -} - - -#ifdef MODULE - -static struct net_device *pam_dev; - -int init_module(void) -{ - pam_dev = pamsnet_probe(-1); - if (IS_ERR(pam_dev)) - return PTR_ERR(pam_dev); - return 0; -} - -void cleanup_module(void) -{ - unregister_netdev(pam_dev); - free_netdev(pam_dev); -} - -#endif /* MODULE */ - -/* Local variables: - * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/include - -b m68k-linuxaout -Wall -Wstrict-prototypes -O2 - -fomit-frame-pointer -pipe -DMODULE -I../../net/inet -c atari_pamsnet.c" - * version-control: t - * kept-new-versions: 5 - * tab-width: 8 - * End: - */ |