src.c

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/*
 *  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. ([email protected])
 *
 * 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:
 *  src.c
 *
 * Abstract: Hardware Device Interface for PMC SRC based controllers
 *
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/completion.h>
#include <linux/time.h>
#include <linux/interrupt.h>
#include <scsi/scsi_host.h>

#include "aacraid.h"

static irqreturn_t aac_src_intr_message(int irq, void *dev_id)
{
    struct aac_dev *dev = dev_id;
    unsigned long bellbits, bellbits_shifted;
    int our_interrupt = 0;
    int isFastResponse;
    u32 index, handle;

    bellbits = src_readl(dev, MUnit.ODR_R);
    if (bellbits & PmDoorBellResponseSent) {
        bellbits = PmDoorBellResponseSent;
        /* handle async. status */
        src_writel(dev, MUnit.ODR_C, bellbits);
        src_readl(dev, MUnit.ODR_C);
        our_interrupt = 1;
        index = dev->host_rrq_idx;
        for (;;) {
            isFastResponse = 0;
            /* remove toggle bit (31) */
            handle = le32_to_cpu(dev->host_rrq[index]) & 0x7fffffff;
            /* check fast response bit (30) */
            if (handle & 0x40000000)
                isFastResponse = 1;
            handle &= 0x0000ffff;
            if (handle == 0)
                break;

            aac_intr_normal(dev, handle-1, 0, isFastResponse, NULL);

            dev->host_rrq[index++] = 0;
            if (index == dev->scsi_host_ptr->can_queue +
                        AAC_NUM_MGT_FIB)
                index = 0;
            dev->host_rrq_idx = index;
        }
    } else {
        bellbits_shifted = (bellbits >> SRC_ODR_SHIFT);
        if (bellbits_shifted & DoorBellAifPending) {
            src_writel(dev, MUnit.ODR_C, bellbits);
            src_readl(dev, MUnit.ODR_C);
            our_interrupt = 1;
            /* handle AIF */
            aac_intr_normal(dev, 0, 2, 0, NULL);
        } else if (bellbits_shifted & OUTBOUNDDOORBELL_0) {
            unsigned long sflags;
            struct list_head *entry;
            int send_it = 0;
            extern int aac_sync_mode;

            if (!aac_sync_mode) {
                src_writel(dev, MUnit.ODR_C, bellbits);
                src_readl(dev, MUnit.ODR_C);
                our_interrupt = 1;
            }

            if (dev->sync_fib) {
                our_interrupt = 1;
                if (dev->sync_fib->callback)
                    dev->sync_fib->callback(dev->sync_fib->callback_data,
                        dev->sync_fib);
                spin_lock_irqsave(&dev->sync_fib->event_lock, sflags);
                if (dev->sync_fib->flags & FIB_CONTEXT_FLAG_WAIT) {
                    dev->management_fib_count--;
                    up(&dev->sync_fib->event_wait);
                }
                spin_unlock_irqrestore(&dev->sync_fib->event_lock, sflags);
                spin_lock_irqsave(&dev->sync_lock, sflags);
                if (!list_empty(&dev->sync_fib_list)) {
                    entry = dev->sync_fib_list.next;
                    dev->sync_fib = list_entry(entry, struct fib, fiblink);
                    list_del(entry);
                    send_it = 1;
                } else {
                    dev->sync_fib = NULL;
                }
                spin_unlock_irqrestore(&dev->sync_lock, sflags);
                if (send_it) {
                    aac_adapter_sync_cmd(dev, SEND_SYNCHRONOUS_FIB,
                        (u32)dev->sync_fib->hw_fib_pa, 0, 0, 0, 0, 0,
                        NULL, NULL, NULL, NULL, NULL);
                }
            }
        }
    }

    if (our_interrupt) {
        return IRQ_HANDLED;
    }
    return IRQ_NONE;
}

static void aac_src_disable_interrupt(struct aac_dev *dev)
{
    src_writel(dev, MUnit.OIMR, dev->OIMR = 0xffffffff);
}

static void aac_src_enable_interrupt_message(struct aac_dev *dev)
{
    src_writel(dev, MUnit.OIMR, dev->OIMR = 0xfffffff8);
}

static int src_sync_cmd(struct aac_dev *dev, u32 command,
    u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
    u32 *status, u32 * r1, u32 * r2, u32 * r3, u32 * r4)
{
    unsigned long start;
    int ok;

    /*
     *  Write the command into Mailbox 0
     */
    writel(command, &dev->IndexRegs->Mailbox[0]);
    /*
     *  Write the parameters into Mailboxes 1 - 6
     */
    writel(p1, &dev->IndexRegs->Mailbox[1]);
    writel(p2, &dev->IndexRegs->Mailbox[2]);
    writel(p3, &dev->IndexRegs->Mailbox[3]);
    writel(p4, &dev->IndexRegs->Mailbox[4]);

    /*
     *  Clear the synch command doorbell to start on a clean slate.
     */
    src_writel(dev, MUnit.ODR_C, OUTBOUNDDOORBELL_0 << SRC_ODR_SHIFT);

    /*
     *  Disable doorbell interrupts
     */
    src_writel(dev, MUnit.OIMR, dev->OIMR = 0xffffffff);

    /*
     *  Force the completion of the mask register write before issuing
     *  the interrupt.
     */
    src_readl(dev, MUnit.OIMR);

    /*
     *  Signal that there is a new synch command
     */
    src_writel(dev, MUnit.IDR, INBOUNDDOORBELL_0 << SRC_IDR_SHIFT);

    if (!dev->sync_mode || command != SEND_SYNCHRONOUS_FIB) {
        ok = 0;
        start = jiffies;

        /*
         *  Wait up to 5 minutes
         */
        while (time_before(jiffies, start+300*HZ)) {
            udelay(5);  /* Delay 5 microseconds to let Mon960 get info. */
            /*
             *  Mon960 will set doorbell0 bit when it has completed the command.
             */
            if ((src_readl(dev, MUnit.ODR_R) >> SRC_ODR_SHIFT) & OUTBOUNDDOORBELL_0) {
                /*
                 *  Clear the doorbell.
                 */
                src_writel(dev, MUnit.ODR_C, OUTBOUNDDOORBELL_0 << SRC_ODR_SHIFT);
                ok = 1;
                break;
            }
            /*
             *  Yield the processor in case we are slow
             */
            msleep(1);
        }
        if (unlikely(ok != 1)) {
            /*
             *  Restore interrupt mask even though we timed out
             */
            aac_adapter_enable_int(dev);
            return -ETIMEDOUT;
        }
        /*
         *  Pull the synch status from Mailbox 0.
         */
        if (status)
            *status = readl(&dev->IndexRegs->Mailbox[0]);
        if (r1)
            *r1 = readl(&dev->IndexRegs->Mailbox[1]);
        if (r2)
            *r2 = readl(&dev->IndexRegs->Mailbox[2]);
        if (r3)
            *r3 = readl(&dev->IndexRegs->Mailbox[3]);
        if (r4)
            *r4 = readl(&dev->IndexRegs->Mailbox[4]);

        /*
         *  Clear the synch command doorbell.
         */
        src_writel(dev, MUnit.ODR_C, OUTBOUNDDOORBELL_0 << SRC_ODR_SHIFT);
    }

    /*
     *  Restore interrupt mask
     */
    aac_adapter_enable_int(dev);
    return 0;
}

static void aac_src_interrupt_adapter(struct aac_dev *dev)
{
    src_sync_cmd(dev, BREAKPOINT_REQUEST,
        0, 0, 0, 0, 0, 0,
        NULL, NULL, NULL, NULL, NULL);
}

static void aac_src_notify_adapter(struct aac_dev *dev, u32 event)
{
    switch (event) {

    case AdapNormCmdQue:
        src_writel(dev, MUnit.ODR_C,
            INBOUNDDOORBELL_1 << SRC_ODR_SHIFT);
        break;
    case HostNormRespNotFull:
        src_writel(dev, MUnit.ODR_C,
            INBOUNDDOORBELL_4 << SRC_ODR_SHIFT);
        break;
    case AdapNormRespQue:
        src_writel(dev, MUnit.ODR_C,
            INBOUNDDOORBELL_2 << SRC_ODR_SHIFT);
        break;
    case HostNormCmdNotFull:
        src_writel(dev, MUnit.ODR_C,
            INBOUNDDOORBELL_3 << SRC_ODR_SHIFT);
        break;
    case FastIo:
        src_writel(dev, MUnit.ODR_C,
            INBOUNDDOORBELL_6 << SRC_ODR_SHIFT);
        break;
    case AdapPrintfDone:
        src_writel(dev, MUnit.ODR_C,
            INBOUNDDOORBELL_5 << SRC_ODR_SHIFT);
        break;
    default:
        BUG();
        break;
    }
}

static void aac_src_start_adapter(struct aac_dev *dev)
{
    struct aac_init *init;

     /* reset host_rrq_idx first */
    dev->host_rrq_idx = 0;

    init = dev->init;
    init->HostElapsedSeconds = cpu_to_le32(get_seconds());

    /* We can only use a 32 bit address here */
    src_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS, (u32)(ulong)dev->init_pa,
      0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
}

static int aac_src_check_health(struct aac_dev *dev)
{
    u32 status = src_readl(dev, MUnit.OMR);

    /*
     *  Check to see if the board failed any self tests.
     */
    if (unlikely(status & SELF_TEST_FAILED))
        return -1;

    /*
     *  Check to see if the board panic'd.
     */
    if (unlikely(status & KERNEL_PANIC))
        return (status >> 16) & 0xFF;
    /*
     *  Wait for the adapter to be up and running.
     */
    if (unlikely(!(status & KERNEL_UP_AND_RUNNING)))
        return -3;
    /*
     *  Everything is OK
     */
    return 0;
}

static int aac_src_deliver_message(struct fib *fib)
{
    struct aac_dev *dev = fib->dev;
    struct aac_queue *q = &dev->queues->queue[AdapNormCmdQueue];
    unsigned long qflags;
    u32 fibsize;
    dma_addr_t address;
    struct aac_fib_xporthdr *pFibX;
    u16 hdr_size = le16_to_cpu(fib->hw_fib_va->header.Size);

    spin_lock_irqsave(q->lock, qflags);
    q->numpending++;
    spin_unlock_irqrestore(q->lock, qflags);

    if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE2) {
        /* Calculate the amount to the fibsize bits */
        fibsize = (hdr_size + 127) / 128 - 1;
        if (fibsize > (ALIGN32 - 1))
            return -EMSGSIZE;
        /* New FIB header, 32-bit */
        address = fib->hw_fib_pa;
        fib->hw_fib_va->header.StructType = FIB_MAGIC2;
        fib->hw_fib_va->header.SenderFibAddress = (u32)address;
        fib->hw_fib_va->header.u.TimeStamp = 0;
        BUG_ON((u32)(address >> 32) != 0L);
        address |= fibsize;
    } else {
        /* Calculate the amount to the fibsize bits */
        fibsize = (sizeof(struct aac_fib_xporthdr) + hdr_size + 127) / 128 - 1;
        if (fibsize > (ALIGN32 - 1))
            return -EMSGSIZE;

        /* Fill XPORT header */
        pFibX = (void *)fib->hw_fib_va - sizeof(struct aac_fib_xporthdr);
        pFibX->Handle = cpu_to_le32(fib->hw_fib_va->header.Handle);
        pFibX->HostAddress = cpu_to_le64(fib->hw_fib_pa);
        pFibX->Size = cpu_to_le32(hdr_size);

        /*
         * The xport header has been 32-byte aligned for us so that fibsize
         * can be masked out of this address by hardware. -- BenC
         */
        address = fib->hw_fib_pa - sizeof(struct aac_fib_xporthdr);
        if (address & (ALIGN32 - 1))
            return -EINVAL;
        address |= fibsize;
    }

    src_writel(dev, MUnit.IQ_H, (address >> 32) & 0xffffffff);
    src_writel(dev, MUnit.IQ_L, address & 0xffffffff);

    return 0;
}

static int aac_src_ioremap(struct aac_dev *dev, u32 size)
{
    if (!size) {
        iounmap(dev->regs.src.bar1);
        dev->regs.src.bar1 = NULL;
        iounmap(dev->regs.src.bar0);
        dev->base = dev->regs.src.bar0 = NULL;
        return 0;
    }
    dev->regs.src.bar1 = ioremap(pci_resource_start(dev->pdev, 2),
        AAC_MIN_SRC_BAR1_SIZE);
    dev->base = NULL;
    if (dev->regs.src.bar1 == NULL)
        return -1;
    dev->base = dev->regs.src.bar0 = ioremap(dev->base_start, size);
    if (dev->base == NULL) {
        iounmap(dev->regs.src.bar1);
        dev->regs.src.bar1 = NULL;
        return -1;
    }
    dev->IndexRegs = &((struct src_registers __iomem *)
        dev->base)->u.tupelo.IndexRegs;
    return 0;
}

static int aac_srcv_ioremap(struct aac_dev *dev, u32 size)
{
    if (!size) {
        iounmap(dev->regs.src.bar0);
        dev->base = dev->regs.src.bar0 = NULL;
        return 0;
    }
    dev->base = dev->regs.src.bar0 = ioremap(dev->base_start, size);
    if (dev->base == NULL)
        return -1;
    dev->IndexRegs = &((struct src_registers __iomem *)
        dev->base)->u.denali.IndexRegs;
    return 0;
}

static int aac_src_restart_adapter(struct aac_dev *dev, int bled)
{
    u32 var, reset_mask;

    if (bled >= 0) {
        if (bled)
            printk(KERN_ERR "%s%d: adapter kernel panic'd %x.\n",
                dev->name, dev->id, bled);
        bled = aac_adapter_sync_cmd(dev, IOP_RESET_ALWAYS,
            0, 0, 0, 0, 0, 0, &var, &reset_mask, NULL, NULL, NULL);
            if (bled || (var != 0x00000001))
                return -EINVAL;
        if (dev->supplement_adapter_info.SupportedOptions2 &
            AAC_OPTION_DOORBELL_RESET) {
            src_writel(dev, MUnit.IDR, reset_mask);
            msleep(5000); /* Delay 5 seconds */
        }
    }

    if (src_readl(dev, MUnit.OMR) & KERNEL_PANIC)
        return -ENODEV;

    if (startup_timeout < 300)
        startup_timeout = 300;

    return 0;
}

int aac_src_select_comm(struct aac_dev *dev, int comm)
{
    switch (comm) {
    case AAC_COMM_MESSAGE:
        dev->a_ops.adapter_enable_int = aac_src_enable_interrupt_message;
        dev->a_ops.adapter_intr = aac_src_intr_message;
        dev->a_ops.adapter_deliver = aac_src_deliver_message;
        break;
    default:
        return 1;
    }
    return 0;
}

int aac_src_init(struct aac_dev *dev)
{
    unsigned long start;
    unsigned long status;
    int restart = 0;
    int instance = dev->id;
    const char *name = dev->name;

    dev->a_ops.adapter_ioremap = aac_src_ioremap;
    dev->a_ops.adapter_comm = aac_src_select_comm;

    dev->base_size = AAC_MIN_SRC_BAR0_SIZE;
    if (aac_adapter_ioremap(dev, dev->base_size)) {
        printk(KERN_WARNING "%s: unable to map adapter.\n", name);
        goto error_iounmap;
    }

    /* Failure to reset here is an option ... */
    dev->a_ops.adapter_sync_cmd = src_sync_cmd;
    dev->a_ops.adapter_enable_int = aac_src_disable_interrupt;
    if ((aac_reset_devices || reset_devices) &&
        !aac_src_restart_adapter(dev, 0))
        ++restart;
    /*
     *  Check to see if the board panic'd while booting.
     */
    status = src_readl(dev, MUnit.OMR);
    if (status & KERNEL_PANIC) {
        if (aac_src_restart_adapter(dev, aac_src_check_health(dev)))
            goto error_iounmap;
        ++restart;
    }
    /*
     *  Check to see if the board failed any self tests.
     */
    status = src_readl(dev, MUnit.OMR);
    if (status & SELF_TEST_FAILED) {
        printk(KERN_ERR "%s%d: adapter self-test failed.\n",
            dev->name, instance);
        goto error_iounmap;
    }
    /*
     *  Check to see if the monitor panic'd while booting.
     */
    if (status & MONITOR_PANIC) {
        printk(KERN_ERR "%s%d: adapter monitor panic.\n",
            dev->name, instance);
        goto error_iounmap;
    }
    start = jiffies;
    /*
     *  Wait for the adapter to be up and running. Wait up to 3 minutes
     */
    while (!((status = src_readl(dev, MUnit.OMR)) &
        KERNEL_UP_AND_RUNNING)) {
        if ((restart &&
          (status & (KERNEL_PANIC|SELF_TEST_FAILED|MONITOR_PANIC))) ||
          time_after(jiffies, start+HZ*startup_timeout)) {
            printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n",
                    dev->name, instance, status);
            goto error_iounmap;
        }
        if (!restart &&
          ((status & (KERNEL_PANIC|SELF_TEST_FAILED|MONITOR_PANIC)) ||
          time_after(jiffies, start + HZ *
          ((startup_timeout > 60)
            ? (startup_timeout - 60)
            : (startup_timeout / 2))))) {
            if (likely(!aac_src_restart_adapter(dev,
                aac_src_check_health(dev))))
                start = jiffies;
            ++restart;
        }
        msleep(1);
    }
    if (restart && aac_commit)
        aac_commit = 1;
    /*
     *  Fill in the common function dispatch table.
     */
    dev->a_ops.adapter_interrupt = aac_src_interrupt_adapter;
    dev->a_ops.adapter_disable_int = aac_src_disable_interrupt;
    dev->a_ops.adapter_notify = aac_src_notify_adapter;
    dev->a_ops.adapter_sync_cmd = src_sync_cmd;
    dev->a_ops.adapter_check_health = aac_src_check_health;
    dev->a_ops.adapter_restart = aac_src_restart_adapter;

    /*
     *  First clear out all interrupts.  Then enable the one's that we
     *  can handle.
     */
    aac_adapter_comm(dev, AAC_COMM_MESSAGE);
    aac_adapter_disable_int(dev);
    src_writel(dev, MUnit.ODR_C, 0xffffffff);
    aac_adapter_enable_int(dev);

    if (aac_init_adapter(dev) == NULL)
        goto error_iounmap;
    if (dev->comm_interface != AAC_COMM_MESSAGE_TYPE1)
        goto error_iounmap;

    dev->msi = aac_msi && !pci_enable_msi(dev->pdev);

    if (request_irq(dev->pdev->irq, dev->a_ops.adapter_intr,
            IRQF_SHARED|IRQF_DISABLED, "aacraid", dev) < 0) {

        if (dev->msi)
            pci_disable_msi(dev->pdev);

        printk(KERN_ERR "%s%d: Interrupt unavailable.\n",
            name, instance);
        goto error_iounmap;
    }
    dev->dbg_base = pci_resource_start(dev->pdev, 2);
    dev->dbg_base_mapped = dev->regs.src.bar1;
    dev->dbg_size = AAC_MIN_SRC_BAR1_SIZE;

    aac_adapter_enable_int(dev);

    if (!dev->sync_mode) {
        /*
         * Tell the adapter that all is configured, and it can
         * start accepting requests
         */
        aac_src_start_adapter(dev);
    }
    return 0;

error_iounmap:

    return -1;
}

int aac_srcv_init(struct aac_dev *dev)
{
    unsigned long start;
    unsigned long status;
    int restart = 0;
    int instance = dev->id;
    const char *name = dev->name;

    dev->a_ops.adapter_ioremap = aac_srcv_ioremap;
    dev->a_ops.adapter_comm = aac_src_select_comm;

    dev->base_size = AAC_MIN_SRCV_BAR0_SIZE;
    if (aac_adapter_ioremap(dev, dev->base_size)) {
        printk(KERN_WARNING "%s: unable to map adapter.\n", name);
        goto error_iounmap;
    }

    /* Failure to reset here is an option ... */
    dev->a_ops.adapter_sync_cmd = src_sync_cmd;
    dev->a_ops.adapter_enable_int = aac_src_disable_interrupt;
    if ((aac_reset_devices || reset_devices) &&
        !aac_src_restart_adapter(dev, 0))
        ++restart;
    /*
     *  Check to see if the board panic'd while booting.
     */
    status = src_readl(dev, MUnit.OMR);
    if (status & KERNEL_PANIC) {
        if (aac_src_restart_adapter(dev, aac_src_check_health(dev)))
            goto error_iounmap;
        ++restart;
    }
    /*
     *  Check to see if the board failed any self tests.
     */
    status = src_readl(dev, MUnit.OMR);
    if (status & SELF_TEST_FAILED) {
        printk(KERN_ERR "%s%d: adapter self-test failed.\n", dev->name, instance);
        goto error_iounmap;
    }
    /*
     *  Check to see if the monitor panic'd while booting.
     */
    if (status & MONITOR_PANIC) {
        printk(KERN_ERR "%s%d: adapter monitor panic.\n", dev->name, instance);
        goto error_iounmap;
    }
    start = jiffies;
    /*
     *  Wait for the adapter to be up and running. Wait up to 3 minutes
     */
    while (!((status = src_readl(dev, MUnit.OMR)) & KERNEL_UP_AND_RUNNING)) {
        if ((restart &&
          (status & (KERNEL_PANIC|SELF_TEST_FAILED|MONITOR_PANIC))) ||
          time_after(jiffies, start+HZ*startup_timeout)) {
            printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n",
                    dev->name, instance, status);
            goto error_iounmap;
        }
        if (!restart &&
          ((status & (KERNEL_PANIC|SELF_TEST_FAILED|MONITOR_PANIC)) ||
          time_after(jiffies, start + HZ *
          ((startup_timeout > 60)
            ? (startup_timeout - 60)
            : (startup_timeout / 2))))) {
            if (likely(!aac_src_restart_adapter(dev, aac_src_check_health(dev))))
                start = jiffies;
            ++restart;
        }
        msleep(1);
    }
    if (restart && aac_commit)
        aac_commit = 1;
    /*
     *  Fill in the common function dispatch table.
     */
    dev->a_ops.adapter_interrupt = aac_src_interrupt_adapter;
    dev->a_ops.adapter_disable_int = aac_src_disable_interrupt;
    dev->a_ops.adapter_notify = aac_src_notify_adapter;
    dev->a_ops.adapter_sync_cmd = src_sync_cmd;
    dev->a_ops.adapter_check_health = aac_src_check_health;
    dev->a_ops.adapter_restart = aac_src_restart_adapter;

    /*
     *  First clear out all interrupts.  Then enable the one's that we
     *  can handle.
     */
    aac_adapter_comm(dev, AAC_COMM_MESSAGE);
    aac_adapter_disable_int(dev);
    src_writel(dev, MUnit.ODR_C, 0xffffffff);
    aac_adapter_enable_int(dev);

    if (aac_init_adapter(dev) == NULL)
        goto error_iounmap;
    if (dev->comm_interface != AAC_COMM_MESSAGE_TYPE2)
        goto error_iounmap;
    dev->msi = aac_msi && !pci_enable_msi(dev->pdev);
    if (request_irq(dev->pdev->irq, dev->a_ops.adapter_intr,
        IRQF_SHARED|IRQF_DISABLED, "aacraid", dev) < 0) {
        if (dev->msi)
            pci_disable_msi(dev->pdev);
        printk(KERN_ERR "%s%d: Interrupt unavailable.\n",
            name, instance);
        goto error_iounmap;
    }
    dev->dbg_base = dev->base_start;
    dev->dbg_base_mapped = dev->base;
    dev->dbg_size = dev->base_size;

    aac_adapter_enable_int(dev);

    if (!dev->sync_mode) {
        /*
         * Tell the adapter that all is configured, and it can
         * start accepting requests
         */
        aac_src_start_adapter(dev);
    }
    return 0;

error_iounmap:

    return -1;
}