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/*
* 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;
}
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