[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 be2e98de9fa..439948ef825 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;
+	}
+}