aboutsummaryrefslogtreecommitdiff
path: root/drivers/scsi/aacraid/commsup.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/scsi/aacraid/commsup.c')
-rw-r--r--drivers/scsi/aacraid/commsup.c939
1 files changed, 939 insertions, 0 deletions
diff --git a/drivers/scsi/aacraid/commsup.c b/drivers/scsi/aacraid/commsup.c
new file mode 100644
index 00000000000..3f36dbaa2bb
--- /dev/null
+++ b/drivers/scsi/aacraid/commsup.c
@@ -0,0 +1,939 @@
+/*
+ * Adaptec AAC series RAID controller driver
+ * (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
+ *
+ * based on the old aacraid driver that is..
+ * Adaptec aacraid device driver for Linux.
+ *
+ * Copyright (c) 2000 Adaptec, Inc. (aacraid@adaptec.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Module Name:
+ * commsup.c
+ *
+ * Abstract: Contain all routines that are required for FSA host/adapter
+ * commuication.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/pci.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/completion.h>
+#include <linux/blkdev.h>
+#include <asm/semaphore.h>
+
+#include "aacraid.h"
+
+/**
+ * fib_map_alloc - allocate the fib objects
+ * @dev: Adapter to allocate for
+ *
+ * Allocate and map the shared PCI space for the FIB blocks used to
+ * talk to the Adaptec firmware.
+ */
+
+static int fib_map_alloc(struct aac_dev *dev)
+{
+ if((dev->hw_fib_va = pci_alloc_consistent(dev->pdev, sizeof(struct hw_fib) * AAC_NUM_FIB, &dev->hw_fib_pa))==NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+/**
+ * fib_map_free - free the fib objects
+ * @dev: Adapter to free
+ *
+ * Free the PCI mappings and the memory allocated for FIB blocks
+ * on this adapter.
+ */
+
+void fib_map_free(struct aac_dev *dev)
+{
+ pci_free_consistent(dev->pdev, sizeof(struct hw_fib) * AAC_NUM_FIB, dev->hw_fib_va, dev->hw_fib_pa);
+}
+
+/**
+ * fib_setup - setup the fibs
+ * @dev: Adapter to set up
+ *
+ * Allocate the PCI space for the fibs, map it and then intialise the
+ * fib area, the unmapped fib data and also the free list
+ */
+
+int fib_setup(struct aac_dev * dev)
+{
+ struct fib *fibptr;
+ struct hw_fib *hw_fib_va;
+ dma_addr_t hw_fib_pa;
+ int i;
+
+ if(fib_map_alloc(dev)<0)
+ return -ENOMEM;
+
+ hw_fib_va = dev->hw_fib_va;
+ hw_fib_pa = dev->hw_fib_pa;
+ memset(hw_fib_va, 0, sizeof(struct hw_fib) * AAC_NUM_FIB);
+ /*
+ * Initialise the fibs
+ */
+ for (i = 0, fibptr = &dev->fibs[i]; i < AAC_NUM_FIB; i++, fibptr++)
+ {
+ fibptr->dev = dev;
+ fibptr->hw_fib = hw_fib_va;
+ fibptr->data = (void *) fibptr->hw_fib->data;
+ fibptr->next = fibptr+1; /* Forward chain the fibs */
+ init_MUTEX_LOCKED(&fibptr->event_wait);
+ spin_lock_init(&fibptr->event_lock);
+ hw_fib_va->header.XferState = 0xffffffff;
+ hw_fib_va->header.SenderSize = cpu_to_le16(sizeof(struct hw_fib));
+ fibptr->hw_fib_pa = hw_fib_pa;
+ hw_fib_va = (struct hw_fib *)((unsigned char *)hw_fib_va + sizeof(struct hw_fib));
+ hw_fib_pa = hw_fib_pa + sizeof(struct hw_fib);
+ }
+ /*
+ * Add the fib chain to the free list
+ */
+ dev->fibs[AAC_NUM_FIB-1].next = NULL;
+ /*
+ * Enable this to debug out of queue space
+ */
+ dev->free_fib = &dev->fibs[0];
+ return 0;
+}
+
+/**
+ * fib_alloc - allocate a fib
+ * @dev: Adapter to allocate the fib for
+ *
+ * Allocate a fib from the adapter fib pool. If the pool is empty we
+ * wait for fibs to become free.
+ */
+
+struct fib * fib_alloc(struct aac_dev *dev)
+{
+ struct fib * fibptr;
+ unsigned long flags;
+ spin_lock_irqsave(&dev->fib_lock, flags);
+ fibptr = dev->free_fib;
+ /* Cannot sleep here or you get hangs. Instead we did the
+ maths at compile time. */
+ if(!fibptr)
+ BUG();
+ dev->free_fib = fibptr->next;
+ spin_unlock_irqrestore(&dev->fib_lock, flags);
+ /*
+ * Set the proper node type code and node byte size
+ */
+ fibptr->type = FSAFS_NTC_FIB_CONTEXT;
+ fibptr->size = sizeof(struct fib);
+ /*
+ * Null out fields that depend on being zero at the start of
+ * each I/O
+ */
+ fibptr->hw_fib->header.XferState = 0;
+ fibptr->callback = NULL;
+ fibptr->callback_data = NULL;
+
+ return fibptr;
+}
+
+/**
+ * fib_free - free a fib
+ * @fibptr: fib to free up
+ *
+ * Frees up a fib and places it on the appropriate queue
+ * (either free or timed out)
+ */
+
+void fib_free(struct fib * fibptr)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&fibptr->dev->fib_lock, flags);
+ if (fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT) {
+ aac_config.fib_timeouts++;
+ fibptr->next = fibptr->dev->timeout_fib;
+ fibptr->dev->timeout_fib = fibptr;
+ } else {
+ if (fibptr->hw_fib->header.XferState != 0) {
+ printk(KERN_WARNING "fib_free, XferState != 0, fibptr = 0x%p, XferState = 0x%x\n",
+ (void*)fibptr,
+ le32_to_cpu(fibptr->hw_fib->header.XferState));
+ }
+ fibptr->next = fibptr->dev->free_fib;
+ fibptr->dev->free_fib = fibptr;
+ }
+ spin_unlock_irqrestore(&fibptr->dev->fib_lock, flags);
+}
+
+/**
+ * fib_init - initialise a fib
+ * @fibptr: The fib to initialize
+ *
+ * Set up the generic fib fields ready for use
+ */
+
+void fib_init(struct fib *fibptr)
+{
+ struct hw_fib *hw_fib = fibptr->hw_fib;
+
+ hw_fib->header.StructType = FIB_MAGIC;
+ hw_fib->header.Size = cpu_to_le16(sizeof(struct hw_fib));
+ hw_fib->header.XferState = cpu_to_le32(HostOwned | FibInitialized | FibEmpty | FastResponseCapable);
+ hw_fib->header.SenderFibAddress = cpu_to_le32(fibptr->hw_fib_pa);
+ hw_fib->header.ReceiverFibAddress = cpu_to_le32(fibptr->hw_fib_pa);
+ hw_fib->header.SenderSize = cpu_to_le16(sizeof(struct hw_fib));
+}
+
+/**
+ * fib_deallocate - deallocate a fib
+ * @fibptr: fib to deallocate
+ *
+ * Will deallocate and return to the free pool the FIB pointed to by the
+ * caller.
+ */
+
+void fib_dealloc(struct fib * fibptr)
+{
+ struct hw_fib *hw_fib = fibptr->hw_fib;
+ if(hw_fib->header.StructType != FIB_MAGIC)
+ BUG();
+ hw_fib->header.XferState = 0;
+}
+
+/*
+ * Commuication primitives define and support the queuing method we use to
+ * support host to adapter commuication. All queue accesses happen through
+ * these routines and are the only routines which have a knowledge of the
+ * how these queues are implemented.
+ */
+
+/**
+ * aac_get_entry - get a queue entry
+ * @dev: Adapter
+ * @qid: Queue Number
+ * @entry: Entry return
+ * @index: Index return
+ * @nonotify: notification control
+ *
+ * With a priority the routine returns a queue entry if the queue has free entries. If the queue
+ * is full(no free entries) than no entry is returned and the function returns 0 otherwise 1 is
+ * returned.
+ */
+
+static int aac_get_entry (struct aac_dev * dev, u32 qid, struct aac_entry **entry, u32 * index, unsigned long *nonotify)
+{
+ struct aac_queue * q;
+
+ /*
+ * All of the queues wrap when they reach the end, so we check
+ * to see if they have reached the end and if they have we just
+ * set the index back to zero. This is a wrap. You could or off
+ * the high bits in all updates but this is a bit faster I think.
+ */
+
+ q = &dev->queues->queue[qid];
+
+ *index = le32_to_cpu(*(q->headers.producer));
+ if ((*index - 2) == le32_to_cpu(*(q->headers.consumer)))
+ *nonotify = 1;
+
+ if (qid == AdapHighCmdQueue) {
+ if (*index >= ADAP_HIGH_CMD_ENTRIES)
+ *index = 0;
+ } else if (qid == AdapNormCmdQueue) {
+ if (*index >= ADAP_NORM_CMD_ENTRIES)
+ *index = 0; /* Wrap to front of the Producer Queue. */
+ }
+ else if (qid == AdapHighRespQueue)
+ {
+ if (*index >= ADAP_HIGH_RESP_ENTRIES)
+ *index = 0;
+ }
+ else if (qid == AdapNormRespQueue)
+ {
+ if (*index >= ADAP_NORM_RESP_ENTRIES)
+ *index = 0; /* Wrap to front of the Producer Queue. */
+ }
+ else {
+ printk("aacraid: invalid qid\n");
+ BUG();
+ }
+
+ if ((*index + 1) == le32_to_cpu(*(q->headers.consumer))) { /* Queue is full */
+ printk(KERN_WARNING "Queue %d full, %d outstanding.\n",
+ qid, q->numpending);
+ return 0;
+ } else {
+ *entry = q->base + *index;
+ return 1;
+ }
+}
+
+/**
+ * aac_queue_get - get the next free QE
+ * @dev: Adapter
+ * @index: Returned index
+ * @priority: Priority of fib
+ * @fib: Fib to associate with the queue entry
+ * @wait: Wait if queue full
+ * @fibptr: Driver fib object to go with fib
+ * @nonotify: Don't notify the adapter
+ *
+ * Gets the next free QE off the requested priorty adapter command
+ * queue and associates the Fib with the QE. The QE represented by
+ * index is ready to insert on the queue when this routine returns
+ * success.
+ */
+
+static int aac_queue_get(struct aac_dev * dev, u32 * index, u32 qid, struct hw_fib * hw_fib, int wait, struct fib * fibptr, unsigned long *nonotify)
+{
+ struct aac_entry * entry = NULL;
+ int map = 0;
+ struct aac_queue * q = &dev->queues->queue[qid];
+
+ spin_lock_irqsave(q->lock, q->SavedIrql);
+
+ if (qid == AdapHighCmdQueue || qid == AdapNormCmdQueue)
+ {
+ /* if no entries wait for some if caller wants to */
+ while (!aac_get_entry(dev, qid, &entry, index, nonotify))
+ {
+ printk(KERN_ERR "GetEntries failed\n");
+ }
+ /*
+ * Setup queue entry with a command, status and fib mapped
+ */
+ entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
+ map = 1;
+ }
+ else if (qid == AdapHighRespQueue || qid == AdapNormRespQueue)
+ {
+ while(!aac_get_entry(dev, qid, &entry, index, nonotify))
+ {
+ /* if no entries wait for some if caller wants to */
+ }
+ /*
+ * Setup queue entry with command, status and fib mapped
+ */
+ entry->size = cpu_to_le32(le16_to_cpu(hw_fib->header.Size));
+ entry->addr = hw_fib->header.SenderFibAddress;
+ /* Restore adapters pointer to the FIB */
+ hw_fib->header.ReceiverFibAddress = hw_fib->header.SenderFibAddress; /* Let the adapter now where to find its data */
+ map = 0;
+ }
+ /*
+ * If MapFib is true than we need to map the Fib and put pointers
+ * in the queue entry.
+ */
+ if (map)
+ entry->addr = cpu_to_le32(fibptr->hw_fib_pa);
+ return 0;
+}
+
+
+/**
+ * aac_insert_entry - insert a queue entry
+ * @dev: Adapter
+ * @index: Index of entry to insert
+ * @qid: Queue number
+ * @nonotify: Suppress adapter notification
+ *
+ * Gets the next free QE off the requested priorty adapter command
+ * queue and associates the Fib with the QE. The QE represented by
+ * index is ready to insert on the queue when this routine returns
+ * success.
+ */
+
+static int aac_insert_entry(struct aac_dev * dev, u32 index, u32 qid, unsigned long nonotify)
+{
+ struct aac_queue * q = &dev->queues->queue[qid];
+
+ if(q == NULL)
+ BUG();
+ *(q->headers.producer) = cpu_to_le32(index + 1);
+ spin_unlock_irqrestore(q->lock, q->SavedIrql);
+
+ if (qid == AdapHighCmdQueue ||
+ qid == AdapNormCmdQueue ||
+ qid == AdapHighRespQueue ||
+ qid == AdapNormRespQueue)
+ {
+ if (!nonotify)
+ aac_adapter_notify(dev, qid);
+ }
+ else
+ printk("Suprise insert!\n");
+ return 0;
+}
+
+/*
+ * Define the highest level of host to adapter communication routines.
+ * These routines will support host to adapter FS commuication. These
+ * routines have no knowledge of the commuication method used. This level
+ * sends and receives FIBs. This level has no knowledge of how these FIBs
+ * get passed back and forth.
+ */
+
+/**
+ * fib_send - send a fib to the adapter
+ * @command: Command to send
+ * @fibptr: The fib
+ * @size: Size of fib data area
+ * @priority: Priority of Fib
+ * @wait: Async/sync select
+ * @reply: True if a reply is wanted
+ * @callback: Called with reply
+ * @callback_data: Passed to callback
+ *
+ * Sends the requested FIB to the adapter and optionally will wait for a
+ * response FIB. If the caller does not wish to wait for a response than
+ * an event to wait on must be supplied. This event will be set when a
+ * response FIB is received from the adapter.
+ */
+
+int fib_send(u16 command, struct fib * fibptr, unsigned long size, int priority, int wait, int reply, fib_callback callback, void * callback_data)
+{
+ u32 index;
+ u32 qid;
+ struct aac_dev * dev = fibptr->dev;
+ unsigned long nointr = 0;
+ struct hw_fib * hw_fib = fibptr->hw_fib;
+ struct aac_queue * q;
+ unsigned long flags = 0;
+ if (!(hw_fib->header.XferState & cpu_to_le32(HostOwned)))
+ return -EBUSY;
+ /*
+ * There are 5 cases with the wait and reponse requested flags.
+ * The only invalid cases are if the caller requests to wait and
+ * does not request a response and if the caller does not want a
+ * response and the Fib is not allocated from pool. If a response
+ * is not requesed the Fib will just be deallocaed by the DPC
+ * routine when the response comes back from the adapter. No
+ * further processing will be done besides deleting the Fib. We
+ * will have a debug mode where the adapter can notify the host
+ * it had a problem and the host can log that fact.
+ */
+ if (wait && !reply) {
+ return -EINVAL;
+ } else if (!wait && reply) {
+ hw_fib->header.XferState |= cpu_to_le32(Async | ResponseExpected);
+ FIB_COUNTER_INCREMENT(aac_config.AsyncSent);
+ } else if (!wait && !reply) {
+ hw_fib->header.XferState |= cpu_to_le32(NoResponseExpected);
+ FIB_COUNTER_INCREMENT(aac_config.NoResponseSent);
+ } else if (wait && reply) {
+ hw_fib->header.XferState |= cpu_to_le32(ResponseExpected);
+ FIB_COUNTER_INCREMENT(aac_config.NormalSent);
+ }
+ /*
+ * Map the fib into 32bits by using the fib number
+ */
+
+ hw_fib->header.SenderFibAddress = cpu_to_le32(((u32)(fibptr-dev->fibs)) << 1);
+ hw_fib->header.SenderData = (u32)(fibptr - dev->fibs);
+ /*
+ * Set FIB state to indicate where it came from and if we want a
+ * response from the adapter. Also load the command from the
+ * caller.
+ *
+ * Map the hw fib pointer as a 32bit value
+ */
+ hw_fib->header.Command = cpu_to_le16(command);
+ hw_fib->header.XferState |= cpu_to_le32(SentFromHost);
+ fibptr->hw_fib->header.Flags = 0; /* 0 the flags field - internal only*/
+ /*
+ * Set the size of the Fib we want to send to the adapter
+ */
+ hw_fib->header.Size = cpu_to_le16(sizeof(struct aac_fibhdr) + size);
+ if (le16_to_cpu(hw_fib->header.Size) > le16_to_cpu(hw_fib->header.SenderSize)) {
+ return -EMSGSIZE;
+ }
+ /*
+ * Get a queue entry connect the FIB to it and send an notify
+ * the adapter a command is ready.
+ */
+ if (priority == FsaHigh) {
+ hw_fib->header.XferState |= cpu_to_le32(HighPriority);
+ qid = AdapHighCmdQueue;
+ } else {
+ hw_fib->header.XferState |= cpu_to_le32(NormalPriority);
+ qid = AdapNormCmdQueue;
+ }
+ q = &dev->queues->queue[qid];
+
+ if(wait)
+ spin_lock_irqsave(&fibptr->event_lock, flags);
+ if(aac_queue_get( dev, &index, qid, hw_fib, 1, fibptr, &nointr)<0)
+ return -EWOULDBLOCK;
+ dprintk((KERN_DEBUG "fib_send: inserting a queue entry at index %d.\n",index));
+ dprintk((KERN_DEBUG "Fib contents:.\n"));
+ dprintk((KERN_DEBUG " Command = %d.\n", hw_fib->header.Command));
+ dprintk((KERN_DEBUG " XferState = %x.\n", hw_fib->header.XferState));
+ dprintk((KERN_DEBUG " hw_fib va being sent=%p\n",fibptr->hw_fib));
+ dprintk((KERN_DEBUG " hw_fib pa being sent=%lx\n",(ulong)fibptr->hw_fib_pa));
+ dprintk((KERN_DEBUG " fib being sent=%p\n",fibptr));
+ /*
+ * Fill in the Callback and CallbackContext if we are not
+ * going to wait.
+ */
+ if (!wait) {
+ fibptr->callback = callback;
+ fibptr->callback_data = callback_data;
+ }
+ FIB_COUNTER_INCREMENT(aac_config.FibsSent);
+ list_add_tail(&fibptr->queue, &q->pendingq);
+ q->numpending++;
+
+ fibptr->done = 0;
+ fibptr->flags = 0;
+
+ if(aac_insert_entry(dev, index, qid, (nointr & aac_config.irq_mod)) < 0)
+ return -EWOULDBLOCK;
+ /*
+ * If the caller wanted us to wait for response wait now.
+ */
+
+ if (wait) {
+ spin_unlock_irqrestore(&fibptr->event_lock, flags);
+ down(&fibptr->event_wait);
+ if(fibptr->done == 0)
+ BUG();
+
+ if((fibptr->flags & FIB_CONTEXT_FLAG_TIMED_OUT)){
+ return -ETIMEDOUT;
+ } else {
+ return 0;
+ }
+ }
+ /*
+ * If the user does not want a response than return success otherwise
+ * return pending
+ */
+ if (reply)
+ return -EINPROGRESS;
+ else
+ return 0;
+}
+
+/**
+ * aac_consumer_get - get the top of the queue
+ * @dev: Adapter
+ * @q: Queue
+ * @entry: Return entry
+ *
+ * Will return a pointer to the entry on the top of the queue requested that
+ * we are a consumer of, and return the address of the queue entry. It does
+ * not change the state of the queue.
+ */
+
+int aac_consumer_get(struct aac_dev * dev, struct aac_queue * q, struct aac_entry **entry)
+{
+ u32 index;
+ int status;
+ if (le32_to_cpu(*q->headers.producer) == le32_to_cpu(*q->headers.consumer)) {
+ status = 0;
+ } else {
+ /*
+ * The consumer index must be wrapped if we have reached
+ * the end of the queue, else we just use the entry
+ * pointed to by the header index
+ */
+ if (le32_to_cpu(*q->headers.consumer) >= q->entries)
+ index = 0;
+ else
+ index = le32_to_cpu(*q->headers.consumer);
+ *entry = q->base + index;
+ status = 1;
+ }
+ return(status);
+}
+
+/**
+ * aac_consumer_free - free consumer entry
+ * @dev: Adapter
+ * @q: Queue
+ * @qid: Queue ident
+ *
+ * Frees up the current top of the queue we are a consumer of. If the
+ * queue was full notify the producer that the queue is no longer full.
+ */
+
+void aac_consumer_free(struct aac_dev * dev, struct aac_queue *q, u32 qid)
+{
+ int wasfull = 0;
+ u32 notify;
+
+ if ((le32_to_cpu(*q->headers.producer)+1) == le32_to_cpu(*q->headers.consumer))
+ wasfull = 1;
+
+ if (le32_to_cpu(*q->headers.consumer) >= q->entries)
+ *q->headers.consumer = cpu_to_le32(1);
+ else
+ *q->headers.consumer = cpu_to_le32(le32_to_cpu(*q->headers.consumer)+1);
+
+ if (wasfull) {
+ switch (qid) {
+
+ case HostNormCmdQueue:
+ notify = HostNormCmdNotFull;
+ break;
+ case HostHighCmdQueue:
+ notify = HostHighCmdNotFull;
+ break;
+ case HostNormRespQueue:
+ notify = HostNormRespNotFull;
+ break;
+ case HostHighRespQueue:
+ notify = HostHighRespNotFull;
+ break;
+ default:
+ BUG();
+ return;
+ }
+ aac_adapter_notify(dev, notify);
+ }
+}
+
+/**
+ * fib_adapter_complete - complete adapter issued fib
+ * @fibptr: fib to complete
+ * @size: size of fib
+ *
+ * Will do all necessary work to complete a FIB that was sent from
+ * the adapter.
+ */
+
+int fib_adapter_complete(struct fib * fibptr, unsigned short size)
+{
+ struct hw_fib * hw_fib = fibptr->hw_fib;
+ struct aac_dev * dev = fibptr->dev;
+ unsigned long nointr = 0;
+ if (hw_fib->header.XferState == 0)
+ return 0;
+ /*
+ * If we plan to do anything check the structure type first.
+ */
+ if ( hw_fib->header.StructType != FIB_MAGIC ) {
+ return -EINVAL;
+ }
+ /*
+ * This block handles the case where the adapter had sent us a
+ * command and we have finished processing the command. We
+ * call completeFib when we are done processing the command
+ * and want to send a response back to the adapter. This will
+ * send the completed cdb to the adapter.
+ */
+ if (hw_fib->header.XferState & cpu_to_le32(SentFromAdapter)) {
+ hw_fib->header.XferState |= cpu_to_le32(HostProcessed);
+ if (hw_fib->header.XferState & cpu_to_le32(HighPriority)) {
+ u32 index;
+ if (size)
+ {
+ size += sizeof(struct aac_fibhdr);
+ if (size > le16_to_cpu(hw_fib->header.SenderSize))
+ return -EMSGSIZE;
+ hw_fib->header.Size = cpu_to_le16(size);
+ }
+ if(aac_queue_get(dev, &index, AdapHighRespQueue, hw_fib, 1, NULL, &nointr) < 0) {
+ return -EWOULDBLOCK;
+ }
+ if (aac_insert_entry(dev, index, AdapHighRespQueue, (nointr & (int)aac_config.irq_mod)) != 0) {
+ }
+ }
+ else if (hw_fib->header.XferState & NormalPriority)
+ {
+ u32 index;
+
+ if (size) {
+ size += sizeof(struct aac_fibhdr);
+ if (size > le16_to_cpu(hw_fib->header.SenderSize))
+ return -EMSGSIZE;
+ hw_fib->header.Size = cpu_to_le16(size);
+ }
+ if (aac_queue_get(dev, &index, AdapNormRespQueue, hw_fib, 1, NULL, &nointr) < 0)
+ return -EWOULDBLOCK;
+ if (aac_insert_entry(dev, index, AdapNormRespQueue, (nointr & (int)aac_config.irq_mod)) != 0)
+ {
+ }
+ }
+ }
+ else
+ {
+ printk(KERN_WARNING "fib_adapter_complete: Unknown xferstate detected.\n");
+ BUG();
+ }
+ return 0;
+}
+
+/**
+ * fib_complete - fib completion handler
+ * @fib: FIB to complete
+ *
+ * Will do all necessary work to complete a FIB.
+ */
+
+int fib_complete(struct fib * fibptr)
+{
+ struct hw_fib * hw_fib = fibptr->hw_fib;
+
+ /*
+ * Check for a fib which has already been completed
+ */
+
+ if (hw_fib->header.XferState == 0)
+ return 0;
+ /*
+ * If we plan to do anything check the structure type first.
+ */
+
+ if (hw_fib->header.StructType != FIB_MAGIC)
+ return -EINVAL;
+ /*
+ * This block completes a cdb which orginated on the host and we
+ * just need to deallocate the cdb or reinit it. At this point the
+ * command is complete that we had sent to the adapter and this
+ * cdb could be reused.
+ */
+ if((hw_fib->header.XferState & cpu_to_le32(SentFromHost)) &&
+ (hw_fib->header.XferState & cpu_to_le32(AdapterProcessed)))
+ {
+ fib_dealloc(fibptr);
+ }
+ else if(hw_fib->header.XferState & cpu_to_le32(SentFromHost))
+ {
+ /*
+ * This handles the case when the host has aborted the I/O
+ * to the adapter because the adapter is not responding
+ */
+ fib_dealloc(fibptr);
+ } else if(hw_fib->header.XferState & cpu_to_le32(HostOwned)) {
+ fib_dealloc(fibptr);
+ } else {
+ BUG();
+ }
+ return 0;
+}
+
+/**
+ * aac_printf - handle printf from firmware
+ * @dev: Adapter
+ * @val: Message info
+ *
+ * Print a message passed to us by the controller firmware on the
+ * Adaptec board
+ */
+
+void aac_printf(struct aac_dev *dev, u32 val)
+{
+ int length = val & 0xffff;
+ int level = (val >> 16) & 0xffff;
+ char *cp = dev->printfbuf;
+
+ /*
+ * The size of the printfbuf is set in port.c
+ * There is no variable or define for it
+ */
+ if (length > 255)
+ length = 255;
+ if (cp[length] != 0)
+ cp[length] = 0;
+ if (level == LOG_AAC_HIGH_ERROR)
+ printk(KERN_WARNING "aacraid:%s", cp);
+ else
+ printk(KERN_INFO "aacraid:%s", cp);
+ memset(cp, 0, 256);
+}
+
+/**
+ * aac_command_thread - command processing thread
+ * @dev: Adapter to monitor
+ *
+ * Waits on the commandready event in it's queue. When the event gets set
+ * it will pull FIBs off it's queue. It will continue to pull FIBs off
+ * until the queue is empty. When the queue is empty it will wait for
+ * more FIBs.
+ */
+
+int aac_command_thread(struct aac_dev * dev)
+{
+ struct hw_fib *hw_fib, *hw_newfib;
+ struct fib *fib, *newfib;
+ struct aac_queue_block *queues = dev->queues;
+ struct aac_fib_context *fibctx;
+ unsigned long flags;
+ DECLARE_WAITQUEUE(wait, current);
+
+ /*
+ * We can only have one thread per adapter for AIF's.
+ */
+ if (dev->aif_thread)
+ return -EINVAL;
+ /*
+ * Set up the name that will appear in 'ps'
+ * stored in task_struct.comm[16].
+ */
+ daemonize("aacraid");
+ allow_signal(SIGKILL);
+ /*
+ * Let the DPC know it has a place to send the AIF's to.
+ */
+ dev->aif_thread = 1;
+ add_wait_queue(&queues->queue[HostNormCmdQueue].cmdready, &wait);
+ set_current_state(TASK_INTERRUPTIBLE);
+ while(1)
+ {
+ spin_lock_irqsave(queues->queue[HostNormCmdQueue].lock, flags);
+ while(!list_empty(&(queues->queue[HostNormCmdQueue].cmdq))) {
+ struct list_head *entry;
+ struct aac_aifcmd * aifcmd;
+
+ set_current_state(TASK_RUNNING);
+
+ entry = queues->queue[HostNormCmdQueue].cmdq.next;
+ list_del(entry);
+
+ spin_unlock_irqrestore(queues->queue[HostNormCmdQueue].lock, flags);
+ fib = list_entry(entry, struct fib, fiblink);
+ /*
+ * We will process the FIB here or pass it to a
+ * worker thread that is TBD. We Really can't
+ * do anything at this point since we don't have
+ * anything defined for this thread to do.
+ */
+ hw_fib = fib->hw_fib;
+ memset(fib, 0, sizeof(struct fib));
+ fib->type = FSAFS_NTC_FIB_CONTEXT;
+ fib->size = sizeof( struct fib );
+ fib->hw_fib = hw_fib;
+ fib->data = hw_fib->data;
+ fib->dev = dev;
+ /*
+ * We only handle AifRequest fibs from the adapter.
+ */
+ aifcmd = (struct aac_aifcmd *) hw_fib->data;
+ if (aifcmd->command == cpu_to_le32(AifCmdDriverNotify)) {
+ /* Handle Driver Notify Events */
+ *(u32 *)hw_fib->data = cpu_to_le32(ST_OK);
+ fib_adapter_complete(fib, sizeof(u32));
+ } else {
+ struct list_head *entry;
+ /* The u32 here is important and intended. We are using
+ 32bit wrapping time to fit the adapter field */
+
+ u32 time_now, time_last;
+ unsigned long flagv;
+
+ time_now = jiffies/HZ;
+
+ spin_lock_irqsave(&dev->fib_lock, flagv);
+ entry = dev->fib_list.next;
+ /*
+ * For each Context that is on the
+ * fibctxList, make a copy of the
+ * fib, and then set the event to wake up the
+ * thread that is waiting for it.
+ */
+ while (entry != &dev->fib_list) {
+ /*
+ * Extract the fibctx
+ */
+ fibctx = list_entry(entry, struct aac_fib_context, next);
+ /*
+ * Check if the queue is getting
+ * backlogged
+ */
+ if (fibctx->count > 20)
+ {
+ /*
+ * It's *not* jiffies folks,
+ * but jiffies / HZ so do not
+ * panic ...
+ */
+ time_last = fibctx->jiffies;
+ /*
+ * Has it been > 2 minutes
+ * since the last read off
+ * the queue?
+ */
+ if ((time_now - time_last) > 120) {
+ entry = entry->next;
+ aac_close_fib_context(dev, fibctx);
+ continue;
+ }
+ }
+ /*
+ * Warning: no sleep allowed while
+ * holding spinlock
+ */
+ hw_newfib = kmalloc(sizeof(struct hw_fib), GFP_ATOMIC);
+ newfib = kmalloc(sizeof(struct fib), GFP_ATOMIC);
+ if (newfib && hw_newfib) {
+ /*
+ * Make the copy of the FIB
+ */
+ memcpy(hw_newfib, hw_fib, sizeof(struct hw_fib));
+ memcpy(newfib, fib, sizeof(struct fib));
+ newfib->hw_fib = hw_newfib;
+ /*
+ * Put the FIB onto the
+ * fibctx's fibs
+ */
+ list_add_tail(&newfib->fiblink, &fibctx->fib_list);
+ fibctx->count++;
+ /*
+ * Set the event to wake up the
+ * thread that will waiting.
+ */
+ up(&fibctx->wait_sem);
+ } else {
+ printk(KERN_WARNING "aifd: didn't allocate NewFib.\n");
+ if(newfib)
+ kfree(newfib);
+ if(hw_newfib)
+ kfree(hw_newfib);
+ }
+ entry = entry->next;
+ }
+ /*
+ * Set the status of this FIB
+ */
+ *(u32 *)hw_fib->data = cpu_to_le32(ST_OK);
+ fib_adapter_complete(fib, sizeof(u32));
+ spin_unlock_irqrestore(&dev->fib_lock, flagv);
+ }
+ spin_lock_irqsave(queues->queue[HostNormCmdQueue].lock, flags);
+ kfree(fib);
+ }
+ /*
+ * There are no more AIF's
+ */
+ spin_unlock_irqrestore(queues->queue[HostNormCmdQueue].lock, flags);
+ schedule();
+
+ if(signal_pending(current))
+ break;
+ set_current_state(TASK_INTERRUPTIBLE);
+ }
+ remove_wait_queue(&queues->queue[HostNormCmdQueue].cmdready, &wait);
+ dev->aif_thread = 0;
+ complete_and_exit(&dev->aif_completion, 0);
+}