/* *	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 * hwfib;	struct fib * fib;	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;		u32 index;		index = le32_to_cpu(entry->addr);		fast = index & 0x01;		fib = &dev->fibs[index >> 1];		hwfib = fib->hw_fib;		aac_consumer_free(dev, q, HostNormRespQueue);		/*		 *	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)) {			list_del(&fib->queue);			dev->queues->queue[AdapNormCmdQueue].numpending--;		} else {			printk(KERN_WARNING "aacraid: FIB timeout (%x).\n", fib->flags);			continue;		}		spin_unlock_irqrestore(q->lock, flags);		if (fast) {			/*			 *	Doctor the fib			 */			*(u32 *)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;			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);		}		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.	 */	dprintk((KERN_INFO	  "dev=%p, dev->comm_phys=%x, dev->comm_addr=%p, dev->comm_size=%u\n",	  dev, (u32)dev->comm_phys, dev->comm_addr, (unsigned)dev->comm_size));	while(aac_consumer_get(dev, q, &entry))	{		struct fib fibctx;		struct hw_fib * hw_fib;		u32 index;		struct fib *fib = &fibctx;		index = le32_to_cpu(entry->addr / sizeof(struct hw_fib));		hw_fib = &dev->aif_base_va[index];		/*		 *	Allocate a FIB at all costs. 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)			if((fib = kmalloc(sizeof(struct fib), GFP_ATOMIC))==NULL)				fib = &fibctx;					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;				if (dev->aif_thread && fib != &fibctx)		{					list_add_tail(&fib->fiblink, &q->cmdq);	 	        aac_consumer_free(dev, q, HostNormCmdQueue);		        wake_up_interruptible(&q->cmdready);		} else {	 	        aac_consumer_free(dev, q, HostNormCmdQueue);			spin_unlock_irqrestore(q->lock, flags);			/*			 *	Set the status of this FIB			 */			*(u32 *)hw_fib->data = cpu_to_le32(ST_OK);			fib_adapter_complete(fib, sizeof(u32));			spin_lock_irqsave(q->lock, flags);		}			}	spin_unlock_irqrestore(q->lock, flags);	return 0;}