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216 lines
6.2 KiB
C
216 lines
6.2 KiB
C
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/*
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* Adaptec AAC series RAID controller driver
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* (c) Copyright 2001 Red Hat Inc. <alan@redhat.com>
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*
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* based on the old aacraid driver that is..
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* Adaptec aacraid device driver for Linux.
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*
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* Copyright (c) 2000 Adaptec, Inc. (aacraid@adaptec.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Module Name:
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* dpcsup.c
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*
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* Abstract: All DPC processing routines for the cyclone board occur here.
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*
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*
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <linux/pci.h>
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#include <linux/spinlock.h>
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#include <linux/slab.h>
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#include <linux/completion.h>
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#include <linux/blkdev.h>
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#include <asm/semaphore.h>
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#include "aacraid.h"
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/**
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* aac_response_normal - Handle command replies
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* @q: Queue to read from
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*
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* This DPC routine will be run when the adapter interrupts us to let us
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* know there is a response on our normal priority queue. We will pull off
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* all QE there are and wake up all the waiters before exiting. We will
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* take a spinlock out on the queue before operating on it.
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*/
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unsigned int aac_response_normal(struct aac_queue * q)
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{
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struct aac_dev * dev = q->dev;
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struct aac_entry *entry;
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struct hw_fib * hwfib;
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struct fib * fib;
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int consumed = 0;
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unsigned long flags;
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spin_lock_irqsave(q->lock, flags);
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/*
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* Keep pulling response QEs off the response queue and waking
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* up the waiters until there are no more QEs. We then return
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* back to the system. If no response was requesed we just
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* deallocate the Fib here and continue.
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*/
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while(aac_consumer_get(dev, q, &entry))
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{
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int fast;
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u32 index = le32_to_cpu(entry->addr);
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fast = index & 0x01;
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fib = &dev->fibs[index >> 1];
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hwfib = fib->hw_fib;
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aac_consumer_free(dev, q, HostNormRespQueue);
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/*
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* Remove this fib from the Outstanding I/O queue.
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* But only if it has not already been timed out.
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*
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* If the fib has been timed out already, then just
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* continue. The caller has already been notified that
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* the fib timed out.
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*/
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if (!(fib->flags & FIB_CONTEXT_FLAG_TIMED_OUT)) {
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list_del(&fib->queue);
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dev->queues->queue[AdapNormCmdQueue].numpending--;
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} else {
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printk(KERN_WARNING "aacraid: FIB timeout (%x).\n", fib->flags);
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printk(KERN_DEBUG"aacraid: hwfib=%p fib index=%i fib=%p\n",hwfib, hwfib->header.SenderData,fib);
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continue;
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}
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spin_unlock_irqrestore(q->lock, flags);
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if (fast) {
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/*
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* Doctor the fib
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*/
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*(u32 *)hwfib->data = cpu_to_le32(ST_OK);
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hwfib->header.XferState |= cpu_to_le32(AdapterProcessed);
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}
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FIB_COUNTER_INCREMENT(aac_config.FibRecved);
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if (hwfib->header.Command == cpu_to_le16(NuFileSystem))
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{
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u32 *pstatus = (u32 *)hwfib->data;
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if (*pstatus & cpu_to_le32(0xffff0000))
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*pstatus = cpu_to_le32(ST_OK);
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}
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if (hwfib->header.XferState & cpu_to_le32(NoResponseExpected | Async))
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{
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if (hwfib->header.XferState & cpu_to_le32(NoResponseExpected))
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FIB_COUNTER_INCREMENT(aac_config.NoResponseRecved);
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else
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FIB_COUNTER_INCREMENT(aac_config.AsyncRecved);
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/*
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* NOTE: we cannot touch the fib after this
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* call, because it may have been deallocated.
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*/
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fib->callback(fib->callback_data, fib);
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} else {
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unsigned long flagv;
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spin_lock_irqsave(&fib->event_lock, flagv);
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fib->done = 1;
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up(&fib->event_wait);
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spin_unlock_irqrestore(&fib->event_lock, flagv);
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FIB_COUNTER_INCREMENT(aac_config.NormalRecved);
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}
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consumed++;
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spin_lock_irqsave(q->lock, flags);
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}
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if (consumed > aac_config.peak_fibs)
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aac_config.peak_fibs = consumed;
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if (consumed == 0)
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aac_config.zero_fibs++;
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spin_unlock_irqrestore(q->lock, flags);
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return 0;
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}
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/**
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* aac_command_normal - handle commands
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* @q: queue to process
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*
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* This DPC routine will be queued when the adapter interrupts us to
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* let us know there is a command on our normal priority queue. We will
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* pull off all QE there are and wake up all the waiters before exiting.
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* We will take a spinlock out on the queue before operating on it.
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*/
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unsigned int aac_command_normal(struct aac_queue *q)
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{
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struct aac_dev * dev = q->dev;
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struct aac_entry *entry;
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unsigned long flags;
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spin_lock_irqsave(q->lock, flags);
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/*
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* Keep pulling response QEs off the response queue and waking
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* up the waiters until there are no more QEs. We then return
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* back to the system.
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*/
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while(aac_consumer_get(dev, q, &entry))
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{
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struct fib fibctx;
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struct hw_fib * hw_fib;
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u32 index;
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struct fib *fib = &fibctx;
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index = le32_to_cpu(entry->addr) / sizeof(struct hw_fib);
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hw_fib = &dev->aif_base_va[index];
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/*
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* Allocate a FIB at all costs. For non queued stuff
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* we can just use the stack so we are happy. We need
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* a fib object in order to manage the linked lists
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*/
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if (dev->aif_thread)
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if((fib = kmalloc(sizeof(struct fib), GFP_ATOMIC)) == NULL)
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fib = &fibctx;
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memset(fib, 0, sizeof(struct fib));
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INIT_LIST_HEAD(&fib->fiblink);
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fib->type = FSAFS_NTC_FIB_CONTEXT;
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fib->size = sizeof(struct fib);
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fib->hw_fib = hw_fib;
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fib->data = hw_fib->data;
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fib->dev = dev;
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if (dev->aif_thread && fib != &fibctx) {
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list_add_tail(&fib->fiblink, &q->cmdq);
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aac_consumer_free(dev, q, HostNormCmdQueue);
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wake_up_interruptible(&q->cmdready);
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} else {
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aac_consumer_free(dev, q, HostNormCmdQueue);
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spin_unlock_irqrestore(q->lock, flags);
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/*
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* Set the status of this FIB
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*/
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*(u32 *)hw_fib->data = cpu_to_le32(ST_OK);
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fib_adapter_complete(fib, sizeof(u32));
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spin_lock_irqsave(q->lock, flags);
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}
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}
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spin_unlock_irqrestore(q->lock, flags);
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return 0;
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}
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