--- /dev/null
+/*
+ * Adaptec AAC series RAID controller driver
+ * (c) Copyright 2001 Red Hat Inc.
+ *
+ * based on the old aacraid driver that is..
+ * Adaptec aacraid device driver for Linux.
+ *
+ * Copyright (c) 2000-2010 Adaptec, Inc.
+ * 2010 PMC-Sierra, Inc. (aacraid@pmc-sierra.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/kernel.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/completion.h>
+#include <linux/blkdev.h>
+#include <linux/semaphore.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, mflags;
+
+ 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 = le32_to_cpu(entry->addr);
+ fast = index & 0x01;
+ fib = &dev->fibs[index >> 2];
+ hwfib = fib->hw_fib_va;
+
+ 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.
+ */
+ atomic_dec(&dev->queues->queue[AdapNormCmdQueue].numpending);
+
+ if (unlikely(fib->flags & FIB_CONTEXT_FLAG_TIMED_OUT)) {
+ spin_unlock_irqrestore(q->lock, flags);
+ aac_fib_complete(fib);
+ aac_fib_free(fib);
+ spin_lock_irqsave(q->lock, flags);
+ continue;
+ }
+ spin_unlock_irqrestore(q->lock, flags);
+
+ if (fast) {
+ /*
+ * Doctor the fib
+ */
+ *(__le32 *)hwfib->data = cpu_to_le32(ST_OK);
+ hwfib->header.XferState |= cpu_to_le32(AdapterProcessed);
+ fib->flags |= FIB_CONTEXT_FLAG_FASTRESP;
+ }
+
+ FIB_COUNTER_INCREMENT(aac_config.FibRecved);
+
+ if (hwfib->header.Command == cpu_to_le16(NuFileSystem))
+ {
+ __le32 *pstatus = (__le32 *)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->flags &= FIB_CONTEXT_FLAG_FASTRESP;
+ fib->callback(fib->callback_data, fib);
+ } else {
+ unsigned long flagv;
+ spin_lock_irqsave(&fib->event_lock, flagv);
+ if (!fib->done) {
+ fib->done = 1;
+ up(&fib->event_wait);
+ }
+ spin_unlock_irqrestore(&fib->event_lock, flagv);
+
+ spin_lock_irqsave(&dev->manage_lock, mflags);
+ dev->management_fib_count--;
+ spin_unlock_irqrestore(&dev->manage_lock, mflags);
+
+ FIB_COUNTER_INCREMENT(aac_config.NormalRecved);
+ if (fib->done == 2) {
+ spin_lock_irqsave(&fib->event_lock, flagv);
+ fib->done = 0;
+ spin_unlock_irqrestore(&fib->event_lock, flagv);
+ aac_fib_complete(fib);
+ aac_fib_free(fib);
+ }
+ }
+ 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 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_va = 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
+ */
+ *(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
+ aac_fib_adapter_complete(fib, sizeof(u32));
+ spin_lock_irqsave(q->lock, flags);
+ }
+ }
+ spin_unlock_irqrestore(q->lock, flags);
+ return 0;
+}
+
+/*
+ *
+ * aac_aif_callback
+ * @context: the context set in the fib - here it is scsi cmd
+ * @fibptr: pointer to the fib
+ *
+ * Handles the AIFs - new method (SRC)
+ *
+ */
+
+static void aac_aif_callback(void *context, struct fib * fibptr)
+{
+ struct fib *fibctx;
+ struct aac_dev *dev;
+ struct aac_aifcmd *cmd;
+ int status;
+
+ fibctx = (struct fib *)context;
+ BUG_ON(fibptr == NULL);
+ dev = fibptr->dev;
+
+ if (fibptr->hw_fib_va->header.XferState &
+ cpu_to_le32(NoMoreAifDataAvailable)) {
+ aac_fib_complete(fibptr);
+ aac_fib_free(fibptr);
+ return;
+ }
+
+ aac_intr_normal(dev, 0, 1, 0, fibptr->hw_fib_va);
+
+ aac_fib_init(fibctx);
+ cmd = (struct aac_aifcmd *) fib_data(fibctx);
+ cmd->command = cpu_to_le32(AifReqEvent);
+
+ status = aac_fib_send(AifRequest,
+ fibctx,
+ sizeof(struct hw_fib)-sizeof(struct aac_fibhdr),
+ FsaNormal,
+ 0, 1,
+ (fib_callback)aac_aif_callback, fibctx);
+}
+
+
+/**
+ * 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,
+ int isAif, int isFastResponse, struct hw_fib *aif_fib)
+{
+ unsigned long mflags;
+ dprintk((KERN_INFO "aac_intr_normal(%p,%x)\n", dev, index));
+ if (isAif == 1) { /* AIF - common */
+ struct hw_fib * hw_fib;
+ struct fib * fib;
+ struct aac_queue *q = &dev->queues->queue[HostNormCmdQueue];
+ unsigned long flags;
+
+ /*
+ * 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 = kzalloc(sizeof(struct fib),GFP_ATOMIC))))
+ return 1;
+ if (!(hw_fib = kzalloc(sizeof(struct hw_fib),GFP_ATOMIC))) {
+ kfree (fib);
+ return 1;
+ }
+ if (aif_fib != NULL) {
+ memcpy(hw_fib, aif_fib, sizeof(struct hw_fib));
+ } else {
+ memcpy(hw_fib,
+ (struct hw_fib *)(((uintptr_t)(dev->regs.sa)) +
+ index), sizeof(struct hw_fib));
+ }
+ INIT_LIST_HEAD(&fib->fiblink);
+ fib->type = FSAFS_NTC_FIB_CONTEXT;
+ fib->size = sizeof(struct fib);
+ fib->hw_fib_va = 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 if (isAif == 2) { /* AIF - new (SRC) */
+ struct fib *fibctx;
+ struct aac_aifcmd *cmd;
+
+ fibctx = aac_fib_alloc(dev);
+ if (!fibctx)
+ return 1;
+ aac_fib_init(fibctx);
+
+ cmd = (struct aac_aifcmd *) fib_data(fibctx);
+ cmd->command = cpu_to_le32(AifReqEvent);
+
+ return aac_fib_send(AifRequest,
+ fibctx,
+ sizeof(struct hw_fib)-sizeof(struct aac_fibhdr),
+ FsaNormal,
+ 0, 1,
+ (fib_callback)aac_aif_callback, fibctx);
+ } else {
+ struct fib *fib = &dev->fibs[index];
+ struct hw_fib * hwfib = fib->hw_fib_va;
+
+ /*
+ * 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.
+ */
+ atomic_dec(&dev->queues->queue[AdapNormCmdQueue].numpending);
+
+ if (unlikely(fib->flags & FIB_CONTEXT_FLAG_TIMED_OUT)) {
+ aac_fib_complete(fib);
+ aac_fib_free(fib);
+ return 0;
+ }
+
+ if (isFastResponse) {
+ /*
+ * Doctor the fib
+ */
+ *(__le32 *)hwfib->data = cpu_to_le32(ST_OK);
+ hwfib->header.XferState |= cpu_to_le32(AdapterProcessed);
+ fib->flags |= FIB_CONTEXT_FLAG_FASTRESP;
+ }
+
+ FIB_COUNTER_INCREMENT(aac_config.FibRecved);
+
+ if (hwfib->header.Command == cpu_to_le16(NuFileSystem))
+ {
+ __le32 *pstatus = (__le32 *)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.
+ */
+ if (likely(fib->callback && fib->callback_data)) {
+ fib->flags &= FIB_CONTEXT_FLAG_FASTRESP;
+ fib->callback(fib->callback_data, fib);
+ } else {
+ aac_fib_complete(fib);
+ aac_fib_free(fib);
+ }
+ } else {
+ unsigned long flagv;
+ dprintk((KERN_INFO "event_wait up\n"));
+ spin_lock_irqsave(&fib->event_lock, flagv);
+ if (!fib->done) {
+ fib->done = 1;
+ up(&fib->event_wait);
+ }
+ spin_unlock_irqrestore(&fib->event_lock, flagv);
+
+ spin_lock_irqsave(&dev->manage_lock, mflags);
+ dev->management_fib_count--;
+ spin_unlock_irqrestore(&dev->manage_lock, mflags);
+
+ FIB_COUNTER_INCREMENT(aac_config.NormalRecved);
+ if (fib->done == 2) {
+ spin_lock_irqsave(&fib->event_lock, flagv);
+ fib->done = 0;
+ spin_unlock_irqrestore(&fib->event_lock, flagv);
+ aac_fib_complete(fib);
+ aac_fib_free(fib);
+ }
+
+ }
+ return 0;
+ }
+}
Code Review / kvmfornfv.git / blobdiff