[SCSI] aacraid: Newer adapter communication iterface support

Received from Mark Salyzyn.

This patch adds the 'new comm' interface, which modern AAC based
adapters that are less than a year old support in the name of much
improved performance. These modern adapters support both the legacy and
the 'new comm' interfaces.

Signed-off-by: Mark Haverkamp <markh@osdl.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 114 insertions, 1 deletions

diff --git a/drivers/scsi/aacraid/dpcsup.c b/drivers/scsi/aacraid/dpcsup.c
index be2e98de9fab..439948ef8251 100644
--- a/drivers/scsi/aacraid/dpcsup.c
+++ b/drivers/scsi/aacraid/dpcsup.c
@@ -73,7 +73,7 @@ unsigned int aac_response_normal(struct aac_queue * q)
                 int fast;
                 u32 index = le32_to_cpu(entry->addr);
                 fast = index & 0x01;
-                fib = &dev->fibs[index >> 1];
+                fib = &dev->fibs[index >> 2];
                 hwfib = fib->hw_fib;
                 
                 aac_consumer_free(dev, q, HostNormRespQueue);
@@ -213,3 +213,116 @@ unsigned int aac_command_normal(struct aac_queue *q)
         spin_unlock_irqrestore(q->lock, flags);
         return 0;
 }
+
+
+/**
+ *      aac_intr_normal -       Handle command replies
+ *      @dev: Device
+ *      @index: completion reference
+ *
+ *      This DPC routine will be run when the adapter interrupts us to let us
+ *      know there is a response on our normal priority queue. We will pull off
+ *      all QE there are and wake up all the waiters before exiting.
+ */
+
+unsigned int aac_intr_normal(struct aac_dev * dev, u32 Index)
+{
+        u32 index = le32_to_cpu(Index);
+
+        dprintk((KERN_INFO "aac_intr_normal(%p,%x)\n", dev, Index));
+        if ((index & 0x00000002L)) {
+                struct hw_fib * hw_fib;
+                struct fib * fib;
+                struct aac_queue *q = &dev->queues->queue[HostNormCmdQueue];
+                unsigned long flags;
+
+                if (index == 0xFFFFFFFEL) /* Special Case */
+                        return 0;         /* Do nothing */
+                /*
+                 *      Allocate a FIB. For non queued stuff we can just use
+                 * the stack so we are happy. We need a fib object in order to
+                 * manage the linked lists.
+                 */
+                if ((!dev->aif_thread)
+                 || (!(fib = kmalloc(sizeof(struct fib),GFP_ATOMIC))))
+                        return 1;
+                if (!(hw_fib = kmalloc(sizeof(struct hw_fib),GFP_ATOMIC))) {
+                        kfree (fib);
+                        return 1;
+                }
+                memset(hw_fib, 0, sizeof(struct hw_fib));
+                memcpy(hw_fib, (struct hw_fib *)(((unsigned long)(dev->regs.sa)) + (index & ~0x00000002L)), sizeof(struct hw_fib));
+                memset(fib, 0, sizeof(struct fib));
+                INIT_LIST_HEAD(&fib->fiblink);
+                fib->type = FSAFS_NTC_FIB_CONTEXT;
+                fib->size = sizeof(struct fib);
+                fib->hw_fib = hw_fib;
+                fib->data = hw_fib->data;
+                fib->dev = dev;
+        
+                spin_lock_irqsave(q->lock, flags);
+                list_add_tail(&fib->fiblink, &q->cmdq);
+                wake_up_interruptible(&q->cmdready);
+                spin_unlock_irqrestore(q->lock, flags);
+                return 1;
+        } else {
+                int fast = index & 0x01;
+                struct fib * fib = &dev->fibs[index >> 2];
+                struct hw_fib * hwfib = fib->hw_fib;
+
+                /*
+                 *      Remove this fib from the Outstanding I/O queue.
+                 *      But only if it has not already been timed out.
+                 *
+                 *      If the fib has been timed out already, then just 
+                 *      continue. The caller has already been notified that
+                 *      the fib timed out.
+                 */
+                if ((fib->flags & FIB_CONTEXT_FLAG_TIMED_OUT)) {
+                        printk(KERN_WARNING "aacraid: FIB timeout (%x).\n", fib->flags);
+                        printk(KERN_DEBUG"aacraid: hwfib=%p index=%i fib=%p\n",hwfib, hwfib->header.SenderData,fib);
+                        return 0;
+                }
+
+                list_del(&fib->queue);
+                dev->queues->queue[AdapNormCmdQueue].numpending--;
+
+                if (fast) {
+                        /*
+                         *      Doctor the fib
+                         */
+                        *(__le32 *)hwfib->data = cpu_to_le32(ST_OK);
+                        hwfib->header.XferState |= cpu_to_le32(AdapterProcessed);
+                }
+
+                FIB_COUNTER_INCREMENT(aac_config.FibRecved);
+
+                if (hwfib->header.Command == cpu_to_le16(NuFileSystem))
+                {
+                        u32 *pstatus = (u32 *)hwfib->data;
+                        if (*pstatus & cpu_to_le32(0xffff0000))
+                                *pstatus = cpu_to_le32(ST_OK);
+                }
+                if (hwfib->header.XferState & cpu_to_le32(NoResponseExpected | Async)) 
+                {
+                        if (hwfib->header.XferState & cpu_to_le32(NoResponseExpected))
+                                FIB_COUNTER_INCREMENT(aac_config.NoResponseRecved);
+                        else 
+                                FIB_COUNTER_INCREMENT(aac_config.AsyncRecved);
+                        /*
+                         *      NOTE:  we cannot touch the fib after this
+                         *          call, because it may have been deallocated.
+                         */
+                        fib->callback(fib->callback_data, fib);
+                } else {
+                        unsigned long flagv;
+                        dprintk((KERN_INFO "event_wait up\n"));
+                        spin_lock_irqsave(&fib->event_lock, flagv);
+                        fib->done = 1;
+                        up(&fib->event_wait);
+                        spin_unlock_irqrestore(&fib->event_lock, flagv);
+                        FIB_COUNTER_INCREMENT(aac_config.NormalRecved);
+                }
+                return 0;
+        }
+}