patch-2.4.17 linux/drivers/scsi/aacraid/dpcsup.c

• Lines: 202
• Date: Fri Dec 21 16:40:32 2001
• Orig file: linux-2.4.16/drivers/scsi/aacraid/dpcsup.c
• Orig date: Thu Jan 1 00:00:00 1970

diff -Naur -X /home/marcelo/lib/dontdiff linux-2.4.16/drivers/scsi/aacraid/dpcsup.c linux/drivers/scsi/aacraid/dpcsup.c
@@ -0,0 +1,201 @@
+/*
+ *	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:
+ *  dpcsup.c
+ *
+ * Abstract: All DPC processing routines for the cyclone board occur here.
+ *
+ *
+ */
+
+#include <linux/config.h>
+#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/blk.h>
+#include <asm/semaphore.h>
+#include "scsi.h"
+#include "hosts.h"
+
+#include "aacraid.h"
+
+/**
+ *	aac_response_normal	-	Handle command replies
+ *	@q: Queue to read from
+ *
+ *	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. We will
+ *	take a spinlock out on the queue before operating on it.
+ */
+
+unsigned int aac_response_normal(struct aac_queue * q)
+{
+	struct aac_dev * dev = q->dev;
+	struct aac_entry *entry;
+	struct hw_fib * fib;
+	struct fib * fibctx;
+	int consumed = 0;
+	unsigned long flags;
+
+	spin_lock_irqsave(q->lock, flags);	
+
+	/*
+	 *	Keep pulling response QEs off the response queue and waking
+	 *	up the waiters until there are no more QEs. We then return
+	 *	back to the system. If no response was requesed we just
+	 *	deallocate the Fib here and continue.
+	 */
+	while(aac_consumer_get(dev, q, &entry))
+	{
+		int fast;
+
+		fast = (int) (entry->addr & 0x01);
+		fib = (struct hw_fib *) (entry->addr & ~0x01);
+		aac_consumer_free(dev, q, HostNormRespQueue);
+		fibctx = (struct fib *)fib->header.SenderData;
+		/*
+		 *	Remove this fibctx 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 (!(fibctx->flags & FIB_CONTEXT_FLAG_TIMED_OUT)) {
+			list_del(&fibctx->queue);
+			dev->queues->queue[AdapNormCmdQueue].numpending--;
+		} else {
+			printk(KERN_WARNING "aacraid: FIB timeout.\n");
+			continue;
+		}
+		spin_unlock_irqrestore(q->lock, flags);
+
+		if (fast) {
+			/*
+			 *	Doctor the fib
+			 */
+			*(u32 *)fib->data = cpu_to_le32(ST_OK);
+			fib->header.XferState |= cpu_to_le32(AdapterProcessed);
+		}
+
+		FIB_COUNTER_INCREMENT(aac_config.FibRecved);
+
+		if (fib->header.Command == cpu_to_le16(NuFileSystem))
+		{
+			u32 *pstatus = (u32 *)fib->data;
+			if (*pstatus & cpu_to_le32(0xffff0000))
+				*pstatus = cpu_to_le32(ST_OK);
+		}
+		if (fib->header.XferState & cpu_to_le32(NoResponseExpected | Async)) 
+		{
+	        	if (fib->header.XferState & cpu_to_le32(NoResponseExpected))
+				FIB_COUNTER_INCREMENT(aac_config.NoResponseRecved);
+			else 
+				FIB_COUNTER_INCREMENT(aac_config.AsyncRecved);
+			/*
+			 *	NOTE:  we cannot touch the fibctx after this
+			 *	    call, because it may have been deallocated.
+			 */
+			fibctx->callback(fibctx->callback_data, fibctx);
+		} else {
+			unsigned long flagv;
+			spin_lock_irqsave(&fibctx->event_lock, flagv);
+			fibctx->done = 1;
+			up(&fibctx->event_wait);
+			spin_unlock_irqrestore(&fibctx->event_lock, flagv);
+			FIB_COUNTER_INCREMENT(aac_config.NormalRecved);
+		}
+		consumed++;
+		spin_lock_irqsave(q->lock, flags);
+	}
+
+	if (consumed > aac_config.peak_fibs)
+		aac_config.peak_fibs = consumed;
+	if (consumed == 0) 
+		aac_config.zero_fibs++;
+
+	spin_unlock_irqrestore(q->lock, flags);
+	return 0;
+}
+
+
+/**
+ *	aac_command_normal	-	handle commands
+ *	@q: queue to process
+ *
+ *	This DPC routine will be queued when the adapter interrupts us to 
+ *	let us know there is a command on our normal priority queue. We will 
+ *	pull off all QE there are and wake up all the waiters before exiting.
+ *	We will take a spinlock out on the queue before operating on it.
+ */
+ 
+unsigned int aac_command_normal(struct aac_queue *q)
+{
+	struct aac_dev * dev = q->dev;
+	struct aac_entry *entry;
+	unsigned long flags;
+
+	spin_lock_irqsave(q->lock, flags);
+
+	/*
+	 *	Keep pulling response QEs off the response queue and waking
+	 *	up the waiters until there are no more QEs. We then return
+	 *	back to the system.
+	 */
+	while(aac_consumer_get(dev, q, &entry))
+	{
+		struct hw_fib * fib;
+		fib = (struct hw_fib *)entry->addr;
+
+		if (dev->aif_thread) {
+		        list_add_tail(&fib->header.FibLinks, &q->cmdq);
+	 	        aac_consumer_free(dev, q, HostNormCmdQueue);
+		        wake_up_interruptible(&q->cmdready);
+		} else {
+			struct fib fibctx;
+	 	        aac_consumer_free(dev, q, HostNormCmdQueue);
+			spin_unlock_irqrestore(q->lock, flags);
+			memset(&fibctx, 0, sizeof(struct fib));
+			fibctx.type = FSAFS_NTC_FIB_CONTEXT;
+			fibctx.size = sizeof(struct fib);
+			fibctx.fib = fib;
+			fibctx.data = fib->data;
+			fibctx.dev = dev;
+			/*
+			 *	Set the status of this FIB
+			 */
+			*(u32 *)fib->data = cpu_to_le32(ST_OK);
+			fib_adapter_complete(&fibctx, sizeof(u32));
+			spin_lock_irqsave(q->lock, flags);
+		}		
+	}
+	spin_unlock_irqrestore(q->lock, flags);
+	return 0;
+}