456 lines
12 KiB
C
456 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Adaptec AAC series RAID controller driver
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* (c) Copyright 2001 Red Hat Inc.
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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) 2000-2010 Adaptec, Inc.
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* 2010-2015 PMC-Sierra, Inc. (aacraid@pmc-sierra.com)
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* 2016-2017 Microsemi Corp. (aacraid@microsemi.com)
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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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#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/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 "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, mflags;
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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 requested 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 >> 2];
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hwfib = fib->hw_fib_va;
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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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atomic_dec(&dev->queues->queue[AdapNormCmdQueue].numpending);
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if (unlikely(fib->flags & FIB_CONTEXT_FLAG_TIMED_OUT)) {
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spin_unlock_irqrestore(q->lock, flags);
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aac_fib_complete(fib);
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aac_fib_free(fib);
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spin_lock_irqsave(q->lock, flags);
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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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*(__le32 *)hwfib->data = cpu_to_le32(ST_OK);
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hwfib->header.XferState |= cpu_to_le32(AdapterProcessed);
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fib->flags |= FIB_CONTEXT_FLAG_FASTRESP;
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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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__le32 *pstatus = (__le32 *)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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if (!fib->done) {
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fib->done = 1;
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complete(&fib->event_wait);
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}
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spin_unlock_irqrestore(&fib->event_lock, flagv);
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spin_lock_irqsave(&dev->manage_lock, mflags);
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dev->management_fib_count--;
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spin_unlock_irqrestore(&dev->manage_lock, mflags);
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FIB_COUNTER_INCREMENT(aac_config.NormalRecved);
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if (fib->done == 2) {
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spin_lock_irqsave(&fib->event_lock, flagv);
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fib->done = 0;
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spin_unlock_irqrestore(&fib->event_lock, flagv);
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aac_fib_complete(fib);
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aac_fib_free(fib);
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}
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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_va = 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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*(__le32 *)hw_fib->data = cpu_to_le32(ST_OK);
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aac_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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/*
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*
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* aac_aif_callback
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* @context: the context set in the fib - here it is scsi cmd
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* @fibptr: pointer to the fib
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*
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* Handles the AIFs - new method (SRC)
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*
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*/
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static void aac_aif_callback(void *context, struct fib * fibptr)
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{
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struct fib *fibctx;
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struct aac_dev *dev;
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struct aac_aifcmd *cmd;
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int status;
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fibctx = (struct fib *)context;
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BUG_ON(fibptr == NULL);
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dev = fibptr->dev;
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if ((fibptr->hw_fib_va->header.XferState &
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cpu_to_le32(NoMoreAifDataAvailable)) ||
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dev->sa_firmware) {
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aac_fib_complete(fibptr);
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aac_fib_free(fibptr);
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return;
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}
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aac_intr_normal(dev, 0, 1, 0, fibptr->hw_fib_va);
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aac_fib_init(fibctx);
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cmd = (struct aac_aifcmd *) fib_data(fibctx);
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cmd->command = cpu_to_le32(AifReqEvent);
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status = aac_fib_send(AifRequest,
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fibctx,
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sizeof(struct hw_fib)-sizeof(struct aac_fibhdr),
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FsaNormal,
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0, 1,
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(fib_callback)aac_aif_callback, fibctx);
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}
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/**
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* aac_intr_normal - Handle command replies
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* @dev: Device
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* @index: completion reference
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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.
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*/
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unsigned int aac_intr_normal(struct aac_dev *dev, u32 index, int isAif,
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int isFastResponse, struct hw_fib *aif_fib)
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{
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unsigned long mflags;
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dprintk((KERN_INFO "aac_intr_normal(%p,%x)\n", dev, index));
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if (isAif == 1) { /* AIF - common */
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struct hw_fib * hw_fib;
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struct fib * fib;
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struct aac_queue *q = &dev->queues->queue[HostNormCmdQueue];
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unsigned long flags;
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/*
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* Allocate a FIB. For non queued stuff we can just use
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* the stack so we are happy. We need a fib object in order to
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* manage the linked lists.
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*/
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if ((!dev->aif_thread)
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|| (!(fib = kzalloc(sizeof(struct fib),GFP_ATOMIC))))
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return 1;
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if (!(hw_fib = kzalloc(sizeof(struct hw_fib),GFP_ATOMIC))) {
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kfree (fib);
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return 1;
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}
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if (dev->sa_firmware) {
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fib->hbacmd_size = index; /* store event type */
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} else if (aif_fib != NULL) {
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memcpy(hw_fib, aif_fib, sizeof(struct hw_fib));
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} else {
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memcpy(hw_fib, (struct hw_fib *)
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(((uintptr_t)(dev->regs.sa)) + index),
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sizeof(struct hw_fib));
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}
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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_va = hw_fib;
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fib->data = hw_fib->data;
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fib->dev = dev;
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spin_lock_irqsave(q->lock, flags);
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list_add_tail(&fib->fiblink, &q->cmdq);
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wake_up_interruptible(&q->cmdready);
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spin_unlock_irqrestore(q->lock, flags);
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return 1;
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} else if (isAif == 2) { /* AIF - new (SRC) */
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struct fib *fibctx;
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struct aac_aifcmd *cmd;
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fibctx = aac_fib_alloc(dev);
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if (!fibctx)
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return 1;
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aac_fib_init(fibctx);
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cmd = (struct aac_aifcmd *) fib_data(fibctx);
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cmd->command = cpu_to_le32(AifReqEvent);
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return aac_fib_send(AifRequest,
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fibctx,
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sizeof(struct hw_fib)-sizeof(struct aac_fibhdr),
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FsaNormal,
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0, 1,
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(fib_callback)aac_aif_callback, fibctx);
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} else {
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struct fib *fib = &dev->fibs[index];
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int start_callback = 0;
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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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atomic_dec(&dev->queues->queue[AdapNormCmdQueue].numpending);
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if (unlikely(fib->flags & FIB_CONTEXT_FLAG_TIMED_OUT)) {
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aac_fib_complete(fib);
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aac_fib_free(fib);
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return 0;
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}
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FIB_COUNTER_INCREMENT(aac_config.FibRecved);
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if (fib->flags & FIB_CONTEXT_FLAG_NATIVE_HBA) {
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if (isFastResponse)
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fib->flags |= FIB_CONTEXT_FLAG_FASTRESP;
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if (fib->callback) {
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start_callback = 1;
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} else {
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unsigned long flagv;
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int completed = 0;
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dprintk((KERN_INFO "event_wait up\n"));
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spin_lock_irqsave(&fib->event_lock, flagv);
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if (fib->done == 2) {
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fib->done = 1;
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completed = 1;
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} else {
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fib->done = 1;
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complete(&fib->event_wait);
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}
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spin_unlock_irqrestore(&fib->event_lock, flagv);
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spin_lock_irqsave(&dev->manage_lock, mflags);
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dev->management_fib_count--;
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spin_unlock_irqrestore(&dev->manage_lock,
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mflags);
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FIB_COUNTER_INCREMENT(aac_config.NativeRecved);
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if (completed)
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aac_fib_complete(fib);
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}
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} else {
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struct hw_fib *hwfib = fib->hw_fib_va;
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if (isFastResponse) {
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/* Doctor the fib */
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*(__le32 *)hwfib->data = cpu_to_le32(ST_OK);
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hwfib->header.XferState |=
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cpu_to_le32(AdapterProcessed);
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fib->flags |= FIB_CONTEXT_FLAG_FASTRESP;
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}
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if (hwfib->header.Command ==
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cpu_to_le16(NuFileSystem)) {
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__le32 *pstatus = (__le32 *)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 &
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cpu_to_le32(NoResponseExpected | Async)) {
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if (hwfib->header.XferState & cpu_to_le32(
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NoResponseExpected))
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FIB_COUNTER_INCREMENT(
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aac_config.NoResponseRecved);
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else
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FIB_COUNTER_INCREMENT(
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aac_config.AsyncRecved);
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start_callback = 1;
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} else {
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unsigned long flagv;
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int completed = 0;
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dprintk((KERN_INFO "event_wait up\n"));
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spin_lock_irqsave(&fib->event_lock, flagv);
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if (fib->done == 2) {
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fib->done = 1;
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completed = 1;
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} else {
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fib->done = 1;
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complete(&fib->event_wait);
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}
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spin_unlock_irqrestore(&fib->event_lock, flagv);
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spin_lock_irqsave(&dev->manage_lock, mflags);
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dev->management_fib_count--;
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spin_unlock_irqrestore(&dev->manage_lock,
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mflags);
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FIB_COUNTER_INCREMENT(aac_config.NormalRecved);
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if (completed)
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aac_fib_complete(fib);
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}
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}
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if (start_callback) {
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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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if (likely(fib->callback && fib->callback_data)) {
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fib->callback(fib->callback_data, fib);
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} else {
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aac_fib_complete(fib);
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aac_fib_free(fib);
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}
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}
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return 0;
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}
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}
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