root/sys/dev/aacraid/aacraid.c
/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2000 Michael Smith
 * Copyright (c) 2001 Scott Long
 * Copyright (c) 2000 BSDi
 * Copyright (c) 2001-2010 Adaptec, Inc.
 * Copyright (c) 2010-2012 PMC-Sierra, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
/*
 * Driver for the Adaptec by PMC Series 6,7,8,... families of RAID controllers
 */
#define AAC_DRIVERNAME                  "aacraid"

#include "opt_aacraid.h"

/* #include <stddef.h> */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <sys/sysent.h>
#include <sys/poll.h>
#include <sys/ioccom.h>

#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/signalvar.h>
#include <sys/time.h>
#include <sys/eventhandler.h>
#include <sys/rman.h>

#include <machine/bus.h>
#include <machine/resource.h>

#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>

#include <dev/aacraid/aacraid_reg.h>
#include <sys/aac_ioctl.h>
#include <dev/aacraid/aacraid_debug.h>
#include <dev/aacraid/aacraid_var.h>
#include <dev/aacraid/aacraid_endian.h>

#ifndef FILTER_HANDLED
#define FILTER_HANDLED  0x02
#endif

static void     aac_add_container(struct aac_softc *sc,
                                  struct aac_mntinforesp *mir, int f, 
                                  u_int32_t uid);
static void     aac_get_bus_info(struct aac_softc *sc);
static void     aac_container_bus(struct aac_softc *sc);
static void     aac_daemon(void *arg);
static int aac_convert_sgraw2(struct aac_softc *sc, struct aac_raw_io2 *raw,
                                                          int pages, int nseg, int nseg_new);

/* Command Processing */
static void     aac_timeout(struct aac_softc *sc);
static void     aac_command_thread(struct aac_softc *sc);
static int      aac_sync_fib(struct aac_softc *sc, u_int32_t command,
                                     u_int32_t xferstate, struct aac_fib *fib,
                                     u_int16_t datasize);
/* Command Buffer Management */
static void     aac_map_command_helper(void *arg, bus_dma_segment_t *segs,
                                       int nseg, int error);
static int      aac_alloc_commands(struct aac_softc *sc);
static void     aac_free_commands(struct aac_softc *sc);
static void     aac_unmap_command(struct aac_command *cm);

/* Hardware Interface */
static int      aac_alloc(struct aac_softc *sc);
static void     aac_common_map(void *arg, bus_dma_segment_t *segs, int nseg,
                               int error);
static int      aac_check_firmware(struct aac_softc *sc);
static void     aac_define_int_mode(struct aac_softc *sc);
static int      aac_init(struct aac_softc *sc);
static int      aac_find_pci_capability(struct aac_softc *sc, int cap);
static int      aac_setup_intr(struct aac_softc *sc);
static int      aac_check_config(struct aac_softc *sc);

/* PMC SRC interface */
static int      aac_src_get_fwstatus(struct aac_softc *sc);
static void     aac_src_qnotify(struct aac_softc *sc, int qbit);
static int      aac_src_get_istatus(struct aac_softc *sc);
static void     aac_src_clear_istatus(struct aac_softc *sc, int mask);
static void     aac_src_set_mailbox(struct aac_softc *sc, u_int32_t command,
                                    u_int32_t arg0, u_int32_t arg1,
                                    u_int32_t arg2, u_int32_t arg3);
static int      aac_src_get_mailbox(struct aac_softc *sc, int mb);
static void     aac_src_access_devreg(struct aac_softc *sc, int mode);
static int aac_src_send_command(struct aac_softc *sc, struct aac_command *cm);
static int aac_src_get_outb_queue(struct aac_softc *sc);
static void aac_src_set_outb_queue(struct aac_softc *sc, int index);

struct aac_interface aacraid_src_interface = {
        aac_src_get_fwstatus,
        aac_src_qnotify,
        aac_src_get_istatus,
        aac_src_clear_istatus,
        aac_src_set_mailbox,
        aac_src_get_mailbox,
        aac_src_access_devreg,
        aac_src_send_command,
        aac_src_get_outb_queue,
        aac_src_set_outb_queue
};

/* PMC SRCv interface */
static void     aac_srcv_set_mailbox(struct aac_softc *sc, u_int32_t command,
                                    u_int32_t arg0, u_int32_t arg1,
                                    u_int32_t arg2, u_int32_t arg3);
static int      aac_srcv_get_mailbox(struct aac_softc *sc, int mb);

struct aac_interface aacraid_srcv_interface = {
        aac_src_get_fwstatus,
        aac_src_qnotify,
        aac_src_get_istatus,
        aac_src_clear_istatus,
        aac_srcv_set_mailbox,
        aac_srcv_get_mailbox,
        aac_src_access_devreg,
        aac_src_send_command,
        aac_src_get_outb_queue,
        aac_src_set_outb_queue
};

/* Debugging and Diagnostics */
static struct aac_code_lookup aac_cpu_variant[] = {
        {"i960JX",              CPUI960_JX},
        {"i960CX",              CPUI960_CX},
        {"i960HX",              CPUI960_HX},
        {"i960RX",              CPUI960_RX},
        {"i960 80303",          CPUI960_80303},
        {"StrongARM SA110",     CPUARM_SA110},
        {"PPC603e",             CPUPPC_603e},
        {"XScale 80321",        CPU_XSCALE_80321},
        {"MIPS 4KC",            CPU_MIPS_4KC},
        {"MIPS 5KC",            CPU_MIPS_5KC},
        {"Unknown StrongARM",   CPUARM_xxx},
        {"Unknown PowerPC",     CPUPPC_xxx},
        {NULL, 0},
        {"Unknown processor",   0}
};

static struct aac_code_lookup aac_battery_platform[] = {
        {"required battery present",            PLATFORM_BAT_REQ_PRESENT},
        {"REQUIRED BATTERY NOT PRESENT",        PLATFORM_BAT_REQ_NOTPRESENT},
        {"optional battery present",            PLATFORM_BAT_OPT_PRESENT},
        {"optional battery not installed",      PLATFORM_BAT_OPT_NOTPRESENT},
        {"no battery support",                  PLATFORM_BAT_NOT_SUPPORTED},
        {NULL, 0},
        {"unknown battery platform",            0}
};
static void     aac_describe_controller(struct aac_softc *sc);
static char     *aac_describe_code(struct aac_code_lookup *table,
                                   u_int32_t code);

/* Management Interface */
static d_open_t         aac_open;
static d_ioctl_t        aac_ioctl;
static d_poll_t         aac_poll;
static void             aac_cdevpriv_dtor(void *arg);
static int      aac_ioctl_sendfib(struct aac_softc *sc, caddr_t ufib);
static int      aac_ioctl_send_raw_srb(struct aac_softc *sc, caddr_t arg);
static void     aac_handle_aif(struct aac_softc *sc, struct aac_fib *fib);
static void     aac_request_aif(struct aac_softc *sc);
static int      aac_rev_check(struct aac_softc *sc, caddr_t udata);
static int      aac_open_aif(struct aac_softc *sc, caddr_t arg);
static int      aac_close_aif(struct aac_softc *sc, caddr_t arg);
static int      aac_getnext_aif(struct aac_softc *sc, caddr_t arg);
static int      aac_return_aif(struct aac_softc *sc,
                               struct aac_fib_context *ctx, caddr_t uptr);
static int      aac_query_disk(struct aac_softc *sc, caddr_t uptr);
static int      aac_get_pci_info(struct aac_softc *sc, caddr_t uptr);
static int      aac_supported_features(struct aac_softc *sc, caddr_t uptr);
static void     aac_ioctl_event(struct aac_softc *sc,
                                struct aac_event *event, void *arg);
static int      aac_reset_adapter(struct aac_softc *sc);
static int      aac_get_container_info(struct aac_softc *sc, 
                                       struct aac_fib *fib, int cid,
                                       struct aac_mntinforesp *mir, 
                                       u_int32_t *uid);         
static u_int32_t
        aac_check_adapter_health(struct aac_softc *sc, u_int8_t *bled);

static struct cdevsw aacraid_cdevsw = {
        .d_version =    D_VERSION,
        .d_flags =      0,
        .d_open =       aac_open,
        .d_ioctl =      aac_ioctl,
        .d_poll =       aac_poll,
        .d_name =       "aacraid",
};

MALLOC_DEFINE(M_AACRAIDBUF, "aacraid_buf", "Buffers for the AACRAID driver");

/* sysctl node */
SYSCTL_NODE(_hw, OID_AUTO, aacraid, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
    "AACRAID driver parameters");

/*
 * Device Interface
 */

/*
 * Initialize the controller and softc
 */
int
aacraid_attach(struct aac_softc *sc)
{
        int error, unit;
        struct aac_fib *fib;
        struct aac_mntinforesp mir;
        int count = 0, i = 0;
        u_int32_t uid;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
        sc->hint_flags = device_get_flags(sc->aac_dev);
        /*
         * Initialize per-controller queues.
         */
        aac_initq_free(sc);
        aac_initq_ready(sc);
        aac_initq_busy(sc);

        /* mark controller as suspended until we get ourselves organised */
        sc->aac_state |= AAC_STATE_SUSPEND;

        /*
         * Check that the firmware on the card is supported.
         */
        sc->msi_enabled = sc->msi_tupelo = FALSE;
        if ((error = aac_check_firmware(sc)) != 0)
                return(error);

        /*
         * Initialize locks
         */
        mtx_init(&sc->aac_io_lock, "AACRAID I/O lock", NULL, MTX_DEF);
        TAILQ_INIT(&sc->aac_container_tqh);
        TAILQ_INIT(&sc->aac_ev_cmfree);

        /* Initialize the clock daemon callout. */
        callout_init_mtx(&sc->aac_daemontime, &sc->aac_io_lock, 0);

        /*
         * Initialize the adapter.
         */
        if ((error = aac_alloc(sc)) != 0)
                return(error);
        aac_define_int_mode(sc);
        if (!(sc->flags & AAC_FLAGS_SYNC_MODE)) {
                if ((error = aac_init(sc)) != 0)
                        return(error);
        }

        /*
         * Allocate and connect our interrupt.
         */
        if ((error = aac_setup_intr(sc)) != 0)
                return(error);

        /*
         * Print a little information about the controller.
         */
        aac_describe_controller(sc);

        /*
         * Make the control device.
         */
        unit = device_get_unit(sc->aac_dev);
        sc->aac_dev_t = make_dev(&aacraid_cdevsw, unit, UID_ROOT, GID_OPERATOR,
                                 0640, "aacraid%d", unit);
        sc->aac_dev_t->si_drv1 = sc;

        /* Create the AIF thread */
        if (aac_kthread_create((void(*)(void *))aac_command_thread, sc,
                   &sc->aifthread, 0, 0, "aacraid%daif", unit))
                panic("Could not create AIF thread");

        /* Register the shutdown method to only be called post-dump */
        if ((sc->eh = EVENTHANDLER_REGISTER(shutdown_final, aacraid_shutdown,
            sc->aac_dev, SHUTDOWN_PRI_DEFAULT)) == NULL)
                device_printf(sc->aac_dev,
                              "shutdown event registration failed\n");

        /* Find containers */
        mtx_lock(&sc->aac_io_lock);
        aac_alloc_sync_fib(sc, &fib);
        /* loop over possible containers */
        do {
                if ((aac_get_container_info(sc, fib, i, &mir, &uid)) != 0)
                        continue;
                if (i == 0) 
                        count = mir.MntRespCount;
                aac_add_container(sc, &mir, 0, uid);
                i++;
        } while ((i < count) && (i < AAC_MAX_CONTAINERS));
        aac_release_sync_fib(sc);
        mtx_unlock(&sc->aac_io_lock);

        /* Register with CAM for the containers */
        TAILQ_INIT(&sc->aac_sim_tqh);
        aac_container_bus(sc);
        /* Register with CAM for the non-DASD devices */
        if ((sc->flags & AAC_FLAGS_ENABLE_CAM) != 0) 
                aac_get_bus_info(sc);

        /* poke the bus to actually attach the child devices */
        bus_attach_children(sc->aac_dev);

        /* mark the controller up */
        sc->aac_state &= ~AAC_STATE_SUSPEND;

        /* enable interrupts now */
        AAC_ACCESS_DEVREG(sc, AAC_ENABLE_INTERRUPT);

        mtx_lock(&sc->aac_io_lock);
        callout_reset(&sc->aac_daemontime, 60 * hz, aac_daemon, sc);
        mtx_unlock(&sc->aac_io_lock);

        return(0);
}

static void
aac_daemon(void *arg)
{
        struct aac_softc *sc;
        struct timeval tv;
        struct aac_command *cm;
        struct aac_fib *fib;

        sc = arg;
        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        mtx_assert(&sc->aac_io_lock, MA_OWNED);
        if (callout_pending(&sc->aac_daemontime) ||
            callout_active(&sc->aac_daemontime) == 0)
                return;
        getmicrotime(&tv);

        if (!aacraid_alloc_command(sc, &cm)) {
                fib = cm->cm_fib;
                cm->cm_timestamp = time_uptime;
                cm->cm_datalen = 0;
                cm->cm_flags |= AAC_CMD_WAIT;

                fib->Header.Size = 
                        sizeof(struct aac_fib_header) + sizeof(u_int32_t);
                fib->Header.XferState =
                        AAC_FIBSTATE_HOSTOWNED   |
                        AAC_FIBSTATE_INITIALISED |
                        AAC_FIBSTATE_EMPTY       |
                        AAC_FIBSTATE_FROMHOST    |
                        AAC_FIBSTATE_REXPECTED   |
                        AAC_FIBSTATE_NORM        |
                        AAC_FIBSTATE_ASYNC       |
                        AAC_FIBSTATE_FAST_RESPONSE;
                fib->Header.Command = SendHostTime;
                *(uint32_t *)fib->data = htole32(tv.tv_sec);

                aacraid_map_command_sg(cm, NULL, 0, 0);
                aacraid_release_command(cm);
        }

        callout_schedule(&sc->aac_daemontime, 30 * 60 * hz);
}

void
aacraid_add_event(struct aac_softc *sc, struct aac_event *event)
{

        switch (event->ev_type & AAC_EVENT_MASK) {
        case AAC_EVENT_CMFREE:
                TAILQ_INSERT_TAIL(&sc->aac_ev_cmfree, event, ev_links);
                break;
        default:
                device_printf(sc->aac_dev, "aac_add event: unknown event %d\n",
                    event->ev_type);
                break;
        }

        return;
}

/*
 * Request information of container #cid
 */
static int
aac_get_container_info(struct aac_softc *sc, struct aac_fib *sync_fib, int cid,
                       struct aac_mntinforesp *mir, u_int32_t *uid)
{
        struct aac_command *cm;
        struct aac_fib *fib;
        struct aac_mntinfo *mi;
        struct aac_cnt_config *ccfg;
        int rval;

        if (sync_fib == NULL) {
                if (aacraid_alloc_command(sc, &cm)) {
                        device_printf(sc->aac_dev,
                                "Warning, no free command available\n");
                        return (-1);
                }
                fib = cm->cm_fib;
        } else {
                fib = sync_fib;
        }

        mi = (struct aac_mntinfo *)&fib->data[0];
        /* 4KB support?, 64-bit LBA? */
        if (sc->aac_support_opt2 & AAC_SUPPORTED_VARIABLE_BLOCK_SIZE)
                mi->Command = VM_NameServeAllBlk;
        else if (sc->flags & AAC_FLAGS_LBA_64BIT) 
                mi->Command = VM_NameServe64;
        else
                mi->Command = VM_NameServe;
        mi->MntType = FT_FILESYS;
        mi->MntCount = cid;
        aac_mntinfo_tole(mi);

        if (sync_fib) {
                if (aac_sync_fib(sc, ContainerCommand, 0, fib,
                         sizeof(struct aac_mntinfo))) {
                        device_printf(sc->aac_dev, "Error probing container %d\n", cid);
                        return (-1);
                }
        } else {
                cm->cm_timestamp = time_uptime;
                cm->cm_datalen = 0;

                fib->Header.Size = 
                        sizeof(struct aac_fib_header) + sizeof(struct aac_mntinfo);
                fib->Header.XferState =
                        AAC_FIBSTATE_HOSTOWNED   |
                        AAC_FIBSTATE_INITIALISED |
                        AAC_FIBSTATE_EMPTY       |
                        AAC_FIBSTATE_FROMHOST    |
                        AAC_FIBSTATE_REXPECTED   |
                        AAC_FIBSTATE_NORM        |
                        AAC_FIBSTATE_ASYNC       |
                        AAC_FIBSTATE_FAST_RESPONSE;
                fib->Header.Command = ContainerCommand;
                if (aacraid_wait_command(cm) != 0) {
                        device_printf(sc->aac_dev, "Error probing container %d\n", cid);
                        aacraid_release_command(cm);
                        return (-1);
                }
        }
        bcopy(&fib->data[0], mir, sizeof(struct aac_mntinforesp));
        aac_mntinforesp_toh(mir);

        /* UID */
        *uid = cid;
        if (mir->MntTable[0].VolType != CT_NONE && 
                !(mir->MntTable[0].ContentState & AAC_FSCS_HIDDEN)) {
                if (!(sc->aac_support_opt2 & AAC_SUPPORTED_VARIABLE_BLOCK_SIZE)) {
                        mir->MntTable[0].ObjExtension.BlockDevice.BlockSize = 0x200;
                        mir->MntTable[0].ObjExtension.BlockDevice.bdLgclPhysMap = 0;
                }
                ccfg = (struct aac_cnt_config *)&fib->data[0];
                bzero(ccfg, sizeof (*ccfg) - CT_PACKET_SIZE);
                ccfg->Command = VM_ContainerConfig;
                ccfg->CTCommand.command = CT_CID_TO_32BITS_UID;
                ccfg->CTCommand.param[0] = cid;
                aac_cnt_config_tole(ccfg);

                if (sync_fib) {
                        rval = aac_sync_fib(sc, ContainerCommand, 0, fib,
                                sizeof(struct aac_cnt_config));
                        aac_cnt_config_toh(ccfg);
                        if (rval == 0 && ccfg->Command == ST_OK &&
                                ccfg->CTCommand.param[0] == CT_OK &&
                                mir->MntTable[0].VolType != CT_PASSTHRU)
                                *uid = ccfg->CTCommand.param[1];
                } else {
                        fib->Header.Size = 
                                sizeof(struct aac_fib_header) + sizeof(struct aac_cnt_config);
                        fib->Header.XferState =
                                AAC_FIBSTATE_HOSTOWNED   |
                                AAC_FIBSTATE_INITIALISED |
                                AAC_FIBSTATE_EMPTY       |
                                AAC_FIBSTATE_FROMHOST    |
                                AAC_FIBSTATE_REXPECTED   |
                                AAC_FIBSTATE_NORM        |
                                AAC_FIBSTATE_ASYNC       |
                                AAC_FIBSTATE_FAST_RESPONSE;
                        fib->Header.Command = ContainerCommand;
                        rval = aacraid_wait_command(cm);
                        aac_cnt_config_toh(ccfg);
                        if (rval == 0 && ccfg->Command == ST_OK &&
                                ccfg->CTCommand.param[0] == CT_OK &&
                                mir->MntTable[0].VolType != CT_PASSTHRU)
                                *uid = ccfg->CTCommand.param[1];
                        aacraid_release_command(cm);
                }
        }

        return (0);
}

/*
 * Create a device to represent a new container
 */
static void
aac_add_container(struct aac_softc *sc, struct aac_mntinforesp *mir, int f, 
                  u_int32_t uid)
{
        struct aac_container *co;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); 

        /*
         * Check container volume type for validity.  Note that many of
         * the possible types may never show up.
         */
        if ((mir->Status == ST_OK) && (mir->MntTable[0].VolType != CT_NONE)) {
                co = (struct aac_container *)malloc(sizeof *co, M_AACRAIDBUF,
                       M_NOWAIT | M_ZERO);
                if (co == NULL) {
                        panic("Out of memory?!");
                }

                co->co_found = f;
                bcopy(&mir->MntTable[0], &co->co_mntobj,
                      sizeof(struct aac_mntobj));
                co->co_uid = uid;
                TAILQ_INSERT_TAIL(&sc->aac_container_tqh, co, co_link);
        }
}

/*
 * Allocate resources associated with (sc)
 */
static int
aac_alloc(struct aac_softc *sc)
{
        bus_size_t maxsize;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        /*
         * Create DMA tag for mapping buffers into controller-addressable space.
         */
        if (bus_dma_tag_create(sc->aac_parent_dmat,     /* parent */
                               1, 0,                    /* algnmnt, boundary */
                               (sc->flags & AAC_FLAGS_SG_64BIT) ?
                               BUS_SPACE_MAXADDR :
                               BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
                               BUS_SPACE_MAXADDR,       /* highaddr */
                               NULL, NULL,              /* filter, filterarg */
                               AAC_MAXIO_SIZE(sc),      /* maxsize */
                               sc->aac_sg_tablesize,    /* nsegments */
                               BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
                               BUS_DMA_ALLOCNOW,        /* flags */
                               busdma_lock_mutex,       /* lockfunc */
                               &sc->aac_io_lock,        /* lockfuncarg */
                               &sc->aac_buffer_dmat)) {
                device_printf(sc->aac_dev, "can't allocate buffer DMA tag\n");
                return (ENOMEM);
        }

        /*
         * Create DMA tag for mapping FIBs into controller-addressable space..
         */
        if (sc->flags & AAC_FLAGS_NEW_COMM_TYPE1) 
                maxsize = sc->aac_max_fibs_alloc * (sc->aac_max_fib_size +
                        sizeof(struct aac_fib_xporthdr) + 31);
        else
                maxsize = sc->aac_max_fibs_alloc * (sc->aac_max_fib_size + 31);
        if (bus_dma_tag_create(sc->aac_parent_dmat,     /* parent */
                               1, 0,                    /* algnmnt, boundary */
                               (sc->flags & AAC_FLAGS_4GB_WINDOW) ?
                               BUS_SPACE_MAXADDR_32BIT :
                               0x7fffffff,              /* lowaddr */
                               BUS_SPACE_MAXADDR,       /* highaddr */
                               NULL, NULL,              /* filter, filterarg */
                               maxsize,                 /* maxsize */
                               1,                       /* nsegments */
                               maxsize,                 /* maxsize */
                               0,                       /* flags */
                               NULL, NULL,              /* No locking needed */
                               &sc->aac_fib_dmat)) {
                device_printf(sc->aac_dev, "can't allocate FIB DMA tag\n");
                return (ENOMEM);
        }

        /*
         * Create DMA tag for the common structure and allocate it.
         */
        maxsize = sizeof(struct aac_common);
        maxsize += sc->aac_max_fibs * sizeof(u_int32_t);
        if (bus_dma_tag_create(sc->aac_parent_dmat,     /* parent */
                               1, 0,                    /* algnmnt, boundary */
                               (sc->flags & AAC_FLAGS_4GB_WINDOW) ?
                               BUS_SPACE_MAXADDR_32BIT :
                               0x7fffffff,              /* lowaddr */
                               BUS_SPACE_MAXADDR,       /* highaddr */
                               NULL, NULL,              /* filter, filterarg */
                               maxsize,                 /* maxsize */
                               1,                       /* nsegments */
                               maxsize,                 /* maxsegsize */
                               0,                       /* flags */
                               NULL, NULL,              /* No locking needed */
                               &sc->aac_common_dmat)) {
                device_printf(sc->aac_dev,
                              "can't allocate common structure DMA tag\n");
                return (ENOMEM);
        }
        if (bus_dmamem_alloc(sc->aac_common_dmat, (void **)&sc->aac_common,
                             BUS_DMA_NOWAIT, &sc->aac_common_dmamap)) {
                device_printf(sc->aac_dev, "can't allocate common structure\n");
                return (ENOMEM);
        }

        (void)bus_dmamap_load(sc->aac_common_dmat, sc->aac_common_dmamap,
                        sc->aac_common, maxsize,
                        aac_common_map, sc, 0);
        bzero(sc->aac_common, maxsize);

        /* Allocate some FIBs and associated command structs */
        TAILQ_INIT(&sc->aac_fibmap_tqh);
        sc->aac_commands = malloc(sc->aac_max_fibs * sizeof(struct aac_command),
                                  M_AACRAIDBUF, M_WAITOK|M_ZERO);
        mtx_lock(&sc->aac_io_lock);
        while (sc->total_fibs < sc->aac_max_fibs) {
                if (aac_alloc_commands(sc) != 0)
                        break;
        }
        mtx_unlock(&sc->aac_io_lock);
        if (sc->total_fibs == 0)
                return (ENOMEM);

        return (0);
}

/*
 * Free all of the resources associated with (sc)
 *
 * Should not be called if the controller is active.
 */
void
aacraid_free(struct aac_softc *sc)
{
        int i;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        /* remove the control device */
        if (sc->aac_dev_t != NULL)
                destroy_dev(sc->aac_dev_t);

        /* throw away any FIB buffers, discard the FIB DMA tag */
        aac_free_commands(sc);
        if (sc->aac_fib_dmat)
                bus_dma_tag_destroy(sc->aac_fib_dmat);

        free(sc->aac_commands, M_AACRAIDBUF);

        /* destroy the common area */
        if (sc->aac_common) {
                bus_dmamap_unload(sc->aac_common_dmat, sc->aac_common_dmamap);
                bus_dmamem_free(sc->aac_common_dmat, sc->aac_common,
                                sc->aac_common_dmamap);
        }
        if (sc->aac_common_dmat)
                bus_dma_tag_destroy(sc->aac_common_dmat);

        /* disconnect the interrupt handler */
        for (i = 0; i < AAC_MAX_MSIX; ++i) {    
                if (sc->aac_intr[i])
                        bus_teardown_intr(sc->aac_dev, 
                                sc->aac_irq[i], sc->aac_intr[i]);
                if (sc->aac_irq[i])
                        bus_release_resource(sc->aac_dev, SYS_RES_IRQ, 
                                sc->aac_irq_rid[i], sc->aac_irq[i]);
                else
                        break;
        }
        if (sc->msi_enabled || sc->msi_tupelo)
                pci_release_msi(sc->aac_dev);

        /* destroy data-transfer DMA tag */
        if (sc->aac_buffer_dmat)
                bus_dma_tag_destroy(sc->aac_buffer_dmat);

        /* destroy the parent DMA tag */
        if (sc->aac_parent_dmat)
                bus_dma_tag_destroy(sc->aac_parent_dmat);

        /* release the register window mapping */
        if (sc->aac_regs_res0 != NULL)
                bus_release_resource(sc->aac_dev, SYS_RES_MEMORY,
                                     sc->aac_regs_rid0, sc->aac_regs_res0);
        if (sc->aac_regs_res1 != NULL)
                bus_release_resource(sc->aac_dev, SYS_RES_MEMORY,
                                     sc->aac_regs_rid1, sc->aac_regs_res1);
}

/*
 * Disconnect from the controller completely, in preparation for unload.
 */
int
aacraid_detach(device_t dev)
{
        struct aac_softc *sc;
        struct aac_container *co;
        struct aac_sim  *sim;
        int error;

        sc = device_get_softc(dev);
        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        error = bus_generic_detach(dev);
        if (error != 0)
                return (error);

        callout_drain(&sc->aac_daemontime);
        /* Remove the child containers */
        while ((co = TAILQ_FIRST(&sc->aac_container_tqh)) != NULL) {
                TAILQ_REMOVE(&sc->aac_container_tqh, co, co_link);
                free(co, M_AACRAIDBUF);
        }

        /* Remove the CAM SIMs */
        while ((sim = TAILQ_FIRST(&sc->aac_sim_tqh)) != NULL) {
                TAILQ_REMOVE(&sc->aac_sim_tqh, sim, sim_link);
                free(sim, M_AACRAIDBUF);
        }

        if (sc->aifflags & AAC_AIFFLAGS_RUNNING) {
                sc->aifflags |= AAC_AIFFLAGS_EXIT;
                wakeup(sc->aifthread);
                tsleep(sc->aac_dev, PUSER | PCATCH, "aac_dch", 30 * hz);
        }

        if (sc->aifflags & AAC_AIFFLAGS_RUNNING)
                panic("Cannot shutdown AIF thread");

        if ((error = aacraid_shutdown(dev)))
                return(error);

        EVENTHANDLER_DEREGISTER(shutdown_final, sc->eh);

        aacraid_free(sc);

        mtx_destroy(&sc->aac_io_lock);

        return(0);
}

/*
 * Bring the controller down to a dormant state and detach all child devices.
 *
 * This function is called before detach or system shutdown.
 *
 * Note that we can assume that the bioq on the controller is empty, as we won't
 * allow shutdown if any device is open.
 */
int
aacraid_shutdown(device_t dev)
{
        struct aac_softc *sc;
        struct aac_fib *fib;
        struct aac_close_command *cc;

        sc = device_get_softc(dev);
        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        sc->aac_state |= AAC_STATE_SUSPEND;

        /*
         * Send a Container shutdown followed by a HostShutdown FIB to the
         * controller to convince it that we don't want to talk to it anymore.
         * We've been closed and all I/O completed already
         */
        device_printf(sc->aac_dev, "shutting down controller...");

        mtx_lock(&sc->aac_io_lock);
        aac_alloc_sync_fib(sc, &fib);
        cc = (struct aac_close_command *)&fib->data[0];

        bzero(cc, sizeof(struct aac_close_command));
        cc->Command = htole32(VM_CloseAll);
        cc->ContainerId = htole32(0xfffffffe);
        if (aac_sync_fib(sc, ContainerCommand, 0, fib,
            sizeof(struct aac_close_command)))
                printf("FAILED.\n");
        else
                printf("done\n");

        AAC_ACCESS_DEVREG(sc, AAC_DISABLE_INTERRUPT);
        aac_release_sync_fib(sc);
        mtx_unlock(&sc->aac_io_lock);

        return(0);
}

/*
 * Bring the controller to a quiescent state, ready for system suspend.
 */
int
aacraid_suspend(device_t dev)
{
        struct aac_softc *sc;

        sc = device_get_softc(dev);

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
        sc->aac_state |= AAC_STATE_SUSPEND;

        AAC_ACCESS_DEVREG(sc, AAC_DISABLE_INTERRUPT);
        return(0);
}

/*
 * Bring the controller back to a state ready for operation.
 */
int
aacraid_resume(device_t dev)
{
        struct aac_softc *sc;

        sc = device_get_softc(dev);

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
        sc->aac_state &= ~AAC_STATE_SUSPEND;
        AAC_ACCESS_DEVREG(sc, AAC_ENABLE_INTERRUPT);
        return(0);
}

/*
 * Interrupt handler for NEW_COMM_TYPE1, NEW_COMM_TYPE2, NEW_COMM_TYPE34 interface.
 */
void
aacraid_new_intr_type1(void *arg)
{
        struct aac_msix_ctx *ctx;
        struct aac_softc *sc;
        int vector_no;
        struct aac_command *cm;
        struct aac_fib *fib;
        u_int32_t bellbits, bellbits_shifted, index, handle;
        int isFastResponse, isAif, noMoreAif, mode;

        ctx = (struct aac_msix_ctx *)arg;
        sc = ctx->sc;
        vector_no = ctx->vector_no;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
        mtx_lock(&sc->aac_io_lock);

        if (sc->msi_enabled) {
                mode = AAC_INT_MODE_MSI;
                if (vector_no == 0) {
                        bellbits = AAC_MEM0_GETREG4(sc, AAC_SRC_ODBR_MSI);
                        if (bellbits & 0x40000)
                                mode |= AAC_INT_MODE_AIF;
                        else if (bellbits & 0x1000)
                                mode |= AAC_INT_MODE_SYNC;
                }
        } else {        
                mode = AAC_INT_MODE_INTX;
                bellbits = AAC_MEM0_GETREG4(sc, AAC_SRC_ODBR_R);
                if (bellbits & AAC_DB_RESPONSE_SENT_NS) {
                        bellbits = AAC_DB_RESPONSE_SENT_NS;
                        AAC_MEM0_SETREG4(sc, AAC_SRC_ODBR_C, bellbits);
                } else {
                        bellbits_shifted = (bellbits >> AAC_SRC_ODR_SHIFT);
                        AAC_MEM0_SETREG4(sc, AAC_SRC_ODBR_C, bellbits);
                        if (bellbits_shifted & AAC_DB_AIF_PENDING)
                                mode |= AAC_INT_MODE_AIF;
                        if (bellbits_shifted & AAC_DB_SYNC_COMMAND)
                                mode |= AAC_INT_MODE_SYNC;
                }
                /* ODR readback, Prep #238630 */
                AAC_MEM0_GETREG4(sc, AAC_SRC_ODBR_R);   
        }

        if (mode & AAC_INT_MODE_SYNC) {
                if (sc->aac_sync_cm) {  
                        cm = sc->aac_sync_cm;
                        aac_unmap_command(cm);
                        cm->cm_flags |= AAC_CMD_COMPLETED;
                        aac_fib_header_toh(&cm->cm_fib->Header);

                        /* is there a completion handler? */
                        if (cm->cm_complete != NULL) {
                                cm->cm_complete(cm);
                        } else {
                                /* assume that someone is sleeping on this command */
                                wakeup(cm);
                        }
                        sc->flags &= ~AAC_QUEUE_FRZN;
                        sc->aac_sync_cm = NULL;
                }
                if (mode & AAC_INT_MODE_INTX)
                        mode &= ~AAC_INT_MODE_SYNC;
                else
                        mode = 0;
        }

        if (mode & AAC_INT_MODE_AIF) {
                if (mode & AAC_INT_MODE_INTX) {
                        aac_request_aif(sc);
                        mode = 0;
                } 
        }

        if (sc->flags & AAC_FLAGS_SYNC_MODE)
                mode = 0;

        if (mode) {
                /* handle async. status */
                index = sc->aac_host_rrq_idx[vector_no];
                for (;;) {
                        isFastResponse = isAif = noMoreAif = 0;
                        /* remove toggle bit (31) */
                        handle = (le32toh(sc->aac_common->ac_host_rrq[index]) &
                            0x7fffffff);
                        /* check fast response bit (30) */
                        if (handle & 0x40000000) 
                                isFastResponse = 1;
                        /* check AIF bit (23) */
                        else if (handle & 0x00800000) 
                                isAif = TRUE;
                        handle &= 0x0000ffff;
                        if (handle == 0) 
                                break;

                        cm = sc->aac_commands + (handle - 1);
                        fib = cm->cm_fib;
                        aac_fib_header_toh(&fib->Header);
                        sc->aac_rrq_outstanding[vector_no]--;
                        if (isAif) {
                                noMoreAif = (fib->Header.XferState & AAC_FIBSTATE_NOMOREAIF) ? 1:0;
                                if (!noMoreAif)
                                        aac_handle_aif(sc, fib);
                                aac_remove_busy(cm);
                                aacraid_release_command(cm);
                        } else {
                                if (isFastResponse) {
                                        fib->Header.XferState |= AAC_FIBSTATE_DONEADAP;
                                        *((u_int32_t *)(fib->data)) = htole32(ST_OK);
                                        cm->cm_flags |= AAC_CMD_FASTRESP;
                                }
                                aac_remove_busy(cm);
                                aac_unmap_command(cm);
                                cm->cm_flags |= AAC_CMD_COMPLETED;

                                /* is there a completion handler? */
                                if (cm->cm_complete != NULL) {
                                        cm->cm_complete(cm);
                                } else {
                                        /* assume that someone is sleeping on this command */
                                        wakeup(cm);
                                }
                                sc->flags &= ~AAC_QUEUE_FRZN;
                        }

                        sc->aac_common->ac_host_rrq[index++] = 0;
                        if (index == (vector_no + 1) * sc->aac_vector_cap) 
                                index = vector_no * sc->aac_vector_cap;
                        sc->aac_host_rrq_idx[vector_no] = index;

                        if ((isAif && !noMoreAif) || sc->aif_pending) 
                                aac_request_aif(sc);
                }
        }

        if (mode & AAC_INT_MODE_AIF) {
                aac_request_aif(sc);
                AAC_ACCESS_DEVREG(sc, AAC_CLEAR_AIF_BIT);
                mode = 0;
        }

        /* see if we can start some more I/O */
        if ((sc->flags & AAC_QUEUE_FRZN) == 0)
                aacraid_startio(sc);
        mtx_unlock(&sc->aac_io_lock);
}

/*
 * Handle notification of one or more FIBs coming from the controller.
 */
static void
aac_command_thread(struct aac_softc *sc)
{
        int retval;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        mtx_lock(&sc->aac_io_lock);
        sc->aifflags = AAC_AIFFLAGS_RUNNING;

        while ((sc->aifflags & AAC_AIFFLAGS_EXIT) == 0) {
                retval = 0;
                if ((sc->aifflags & AAC_AIFFLAGS_PENDING) == 0)
                        retval = msleep(sc->aifthread, &sc->aac_io_lock, PRIBIO,
                                        "aacraid_aifthd", AAC_PERIODIC_INTERVAL * hz);

                /*
                 * First see if any FIBs need to be allocated.
                 */
                if ((sc->aifflags & AAC_AIFFLAGS_ALLOCFIBS) != 0) {
                        aac_alloc_commands(sc);
                        sc->aifflags &= ~AAC_AIFFLAGS_ALLOCFIBS;
                        aacraid_startio(sc);
                }

                /*
                 * While we're here, check to see if any commands are stuck.
                 * This is pretty low-priority, so it's ok if it doesn't
                 * always fire.
                 */
                if (retval == EWOULDBLOCK)
                        aac_timeout(sc);

                /* Check the hardware printf message buffer */
                if (sc->aac_common->ac_printf[0] != 0)
                        aac_print_printf(sc);
        }
        sc->aifflags &= ~AAC_AIFFLAGS_RUNNING;
        mtx_unlock(&sc->aac_io_lock);
        wakeup(sc->aac_dev);

        aac_kthread_exit(0);
}

/*
 * Submit a command to the controller, return when it completes.
 * XXX This is very dangerous!  If the card has gone out to lunch, we could
 *     be stuck here forever.  At the same time, signals are not caught
 *     because there is a risk that a signal could wakeup the sleep before
 *     the card has a chance to complete the command.  Since there is no way
 *     to cancel a command that is in progress, we can't protect against the
 *     card completing a command late and spamming the command and data
 *     memory.  So, we are held hostage until the command completes.
 */
int
aacraid_wait_command(struct aac_command *cm)
{
        struct aac_softc *sc;
        int error;

        sc = cm->cm_sc;
        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
        mtx_assert(&sc->aac_io_lock, MA_OWNED);

        /* Put the command on the ready queue and get things going */
        aac_enqueue_ready(cm);
        aacraid_startio(sc);
        error = msleep(cm, &sc->aac_io_lock, PRIBIO, "aacraid_wait", 0);
        return(error);
}

/*
 *Command Buffer Management
 */

/*
 * Allocate a command.
 */
int
aacraid_alloc_command(struct aac_softc *sc, struct aac_command **cmp)
{
        struct aac_command *cm;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        if ((cm = aac_dequeue_free(sc)) == NULL) {
                if (sc->total_fibs < sc->aac_max_fibs) {
                        sc->aifflags |= AAC_AIFFLAGS_ALLOCFIBS;
                        wakeup(sc->aifthread);
                }
                return (EBUSY);
        }

        *cmp = cm;
        return(0);
}

/*
 * Release a command back to the freelist.
 */
void
aacraid_release_command(struct aac_command *cm)
{
        struct aac_event *event;
        struct aac_softc *sc;

        sc = cm->cm_sc;
        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
        mtx_assert(&sc->aac_io_lock, MA_OWNED);

        /* (re)initialize the command/FIB */
        cm->cm_sgtable = NULL;
        cm->cm_flags = 0;
        cm->cm_complete = NULL;
        cm->cm_ccb = NULL;
        cm->cm_passthr_dmat = 0;
        cm->cm_fib->Header.XferState = AAC_FIBSTATE_EMPTY;
        cm->cm_fib->Header.StructType = AAC_FIBTYPE_TFIB;
        cm->cm_fib->Header.Unused = 0;
        cm->cm_fib->Header.SenderSize = cm->cm_sc->aac_max_fib_size;

        /*
         * These are duplicated in aac_start to cover the case where an
         * intermediate stage may have destroyed them.  They're left
         * initialized here for debugging purposes only.
         */
        cm->cm_fib->Header.u.ReceiverFibAddress = (u_int32_t)cm->cm_fibphys;
        cm->cm_fib->Header.Handle = 0;

        aac_enqueue_free(cm);

        /*
         * Dequeue all events so that there's no risk of events getting
         * stranded.
         */
        while ((event = TAILQ_FIRST(&sc->aac_ev_cmfree)) != NULL) {
                TAILQ_REMOVE(&sc->aac_ev_cmfree, event, ev_links);
                event->ev_callback(sc, event, event->ev_arg);
        }
}

/*
 * Map helper for command/FIB allocation.
 */
static void
aac_map_command_helper(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
        uint64_t        *fibphys;

        fibphys = (uint64_t *)arg;

        *fibphys = segs[0].ds_addr;
}

/*
 * Allocate and initialize commands/FIBs for this adapter.
 */
static int
aac_alloc_commands(struct aac_softc *sc)
{
        struct aac_command *cm;
        struct aac_fibmap *fm;
        uint64_t fibphys;
        int i, error;
        u_int32_t maxsize;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
        mtx_assert(&sc->aac_io_lock, MA_OWNED);

        if (sc->total_fibs + sc->aac_max_fibs_alloc > sc->aac_max_fibs)
                return (ENOMEM);

        fm = malloc(sizeof(struct aac_fibmap), M_AACRAIDBUF, M_NOWAIT|M_ZERO);
        if (fm == NULL)
                return (ENOMEM);

        mtx_unlock(&sc->aac_io_lock);
        /* allocate the FIBs in DMAable memory and load them */
        if (bus_dmamem_alloc(sc->aac_fib_dmat, (void **)&fm->aac_fibs,
                             BUS_DMA_NOWAIT, &fm->aac_fibmap)) {
                device_printf(sc->aac_dev,
                              "Not enough contiguous memory available.\n");
                free(fm, M_AACRAIDBUF);
                mtx_lock(&sc->aac_io_lock);
                return (ENOMEM);
        }

        maxsize = sc->aac_max_fib_size + 31;
        if (sc->flags & AAC_FLAGS_NEW_COMM_TYPE1) 
                maxsize += sizeof(struct aac_fib_xporthdr);
        /* Ignore errors since this doesn't bounce */
        (void)bus_dmamap_load(sc->aac_fib_dmat, fm->aac_fibmap, fm->aac_fibs,
                              sc->aac_max_fibs_alloc * maxsize,
                              aac_map_command_helper, &fibphys, 0);
        mtx_lock(&sc->aac_io_lock);

        /* initialize constant fields in the command structure */
        bzero(fm->aac_fibs, sc->aac_max_fibs_alloc * maxsize);
        for (i = 0; i < sc->aac_max_fibs_alloc; i++) {
                cm = sc->aac_commands + sc->total_fibs;
                fm->aac_commands = cm;
                cm->cm_sc = sc;
                cm->cm_fib = (struct aac_fib *)
                        ((u_int8_t *)fm->aac_fibs + i * maxsize);
                cm->cm_fibphys = fibphys + i * maxsize;
                if (sc->flags & AAC_FLAGS_NEW_COMM_TYPE1) {
                        u_int64_t fibphys_aligned;
                        fibphys_aligned = 
                                (cm->cm_fibphys + sizeof(struct aac_fib_xporthdr) + 31) & ~31;
                        cm->cm_fib = (struct aac_fib *)
                                ((u_int8_t *)cm->cm_fib + (fibphys_aligned - cm->cm_fibphys));
                        cm->cm_fibphys = fibphys_aligned;
                } else {
                        u_int64_t fibphys_aligned;
                        fibphys_aligned = (cm->cm_fibphys + 31) & ~31;
                        cm->cm_fib = (struct aac_fib *)
                                ((u_int8_t *)cm->cm_fib + (fibphys_aligned - cm->cm_fibphys));
                        cm->cm_fibphys = fibphys_aligned;
                }
                cm->cm_index = sc->total_fibs;

                if ((error = bus_dmamap_create(sc->aac_buffer_dmat, 0,
                                               &cm->cm_datamap)) != 0)
                        break;
                if (sc->aac_max_fibs <= 1 || sc->aac_max_fibs - sc->total_fibs > 1)
                        aacraid_release_command(cm);
                sc->total_fibs++;
        }

        if (i > 0) {
                TAILQ_INSERT_TAIL(&sc->aac_fibmap_tqh, fm, fm_link);
                fwprintf(sc, HBA_FLAGS_DBG_COMM_B, "total_fibs= %d\n", sc->total_fibs);
                return (0);
        }

        bus_dmamap_unload(sc->aac_fib_dmat, fm->aac_fibmap);
        bus_dmamem_free(sc->aac_fib_dmat, fm->aac_fibs, fm->aac_fibmap);
        free(fm, M_AACRAIDBUF);
        return (ENOMEM);
}

/*
 * Free FIBs owned by this adapter.
 */
static void
aac_free_commands(struct aac_softc *sc)
{
        struct aac_fibmap *fm;
        struct aac_command *cm;
        int i;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        while ((fm = TAILQ_FIRST(&sc->aac_fibmap_tqh)) != NULL) {
                TAILQ_REMOVE(&sc->aac_fibmap_tqh, fm, fm_link);
                /*
                 * We check against total_fibs to handle partially
                 * allocated blocks.
                 */
                for (i = 0; i < sc->aac_max_fibs_alloc && sc->total_fibs--; i++) {
                        cm = fm->aac_commands + i;
                        bus_dmamap_destroy(sc->aac_buffer_dmat, cm->cm_datamap);
                }
                bus_dmamap_unload(sc->aac_fib_dmat, fm->aac_fibmap);
                bus_dmamem_free(sc->aac_fib_dmat, fm->aac_fibs, fm->aac_fibmap);
                free(fm, M_AACRAIDBUF);
        }
}

/*
 * Command-mapping helper function - populate this command's s/g table.
 */
void
aacraid_map_command_sg(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
        struct aac_softc *sc;
        struct aac_command *cm;
        struct aac_fib *fib;
        int i;

        cm = (struct aac_command *)arg;
        sc = cm->cm_sc;
        fib = cm->cm_fib;
        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "nseg %d", nseg);
        mtx_assert(&sc->aac_io_lock, MA_OWNED);

        if ((sc->flags & AAC_FLAGS_SYNC_MODE) && sc->aac_sync_cm)
                return;

        /* copy into the FIB */
        if (cm->cm_sgtable != NULL) {
                if (fib->Header.Command == RawIo2) {
                        struct aac_raw_io2 *raw;
                        struct aac_sge_ieee1212 *sg;
                        u_int32_t min_size = PAGE_SIZE, cur_size;
                        int conformable = TRUE;

                        raw = (struct aac_raw_io2 *)&fib->data[0];
                        sg = (struct aac_sge_ieee1212 *)cm->cm_sgtable;
                        raw->sgeCnt = nseg;

                        for (i = 0; i < nseg; i++) {
                                cur_size = segs[i].ds_len;
                                sg[i].addrHigh = 0;
                                *(bus_addr_t *)&sg[i].addrLow = segs[i].ds_addr;
                                sg[i].length = cur_size;
                                sg[i].flags = 0;
                                if (i == 0) {
                                        raw->sgeFirstSize = cur_size;
                                } else if (i == 1) {
                                        raw->sgeNominalSize = cur_size;
                                        min_size = cur_size;
                                } else if ((i+1) < nseg && 
                                        cur_size != raw->sgeNominalSize) {
                                        conformable = FALSE;
                                        if (cur_size < min_size)
                                                min_size = cur_size;
                                }
                        }

                        /* not conformable: evaluate required sg elements */
                        if (!conformable) {
                                int j, err_found, nseg_new = nseg;
                                for (i = min_size / PAGE_SIZE; i >= 1; --i) {
                                        err_found = FALSE;
                                        nseg_new = 2;
                                        for (j = 1; j < nseg - 1; ++j) {
                                                if (sg[j].length % (i*PAGE_SIZE)) {
                                                        err_found = TRUE;
                                                        break;
                                                }
                                                nseg_new += (sg[j].length / (i*PAGE_SIZE));
                                        }
                                        if (!err_found)
                                                break;
                                }
                                if (i>0 && nseg_new<=sc->aac_sg_tablesize && 
                                        !(sc->hint_flags & 4))
                                        nseg = aac_convert_sgraw2(sc, 
                                                raw, i, nseg, nseg_new);
                        } else {
                                raw->flags |= RIO2_SGL_CONFORMANT;
                        }

                        for (i = 0; i < nseg; i++)
                                aac_sge_ieee1212_tole(sg + i);
                        aac_raw_io2_tole(raw);

                        /* update the FIB size for the s/g count */
                        fib->Header.Size += nseg * 
                                sizeof(struct aac_sge_ieee1212);

                } else if (fib->Header.Command == RawIo) {
                        struct aac_sg_tableraw *sg;
                        sg = (struct aac_sg_tableraw *)cm->cm_sgtable;
                        sg->SgCount = htole32(nseg);
                        for (i = 0; i < nseg; i++) {
                                sg->SgEntryRaw[i].SgAddress = segs[i].ds_addr;
                                sg->SgEntryRaw[i].SgByteCount = segs[i].ds_len;
                                sg->SgEntryRaw[i].Next = 0;
                                sg->SgEntryRaw[i].Prev = 0;
                                sg->SgEntryRaw[i].Flags = 0;
                                aac_sg_entryraw_tole(&sg->SgEntryRaw[i]);
                        }
                        aac_raw_io_tole((struct aac_raw_io *)&fib->data[0]);
                        /* update the FIB size for the s/g count */
                        fib->Header.Size += nseg*sizeof(struct aac_sg_entryraw);
                } else if ((cm->cm_sc->flags & AAC_FLAGS_SG_64BIT) == 0) {
                        struct aac_sg_table *sg;
                        sg = cm->cm_sgtable;
                        sg->SgCount = htole32(nseg);
                        for (i = 0; i < nseg; i++) {
                                sg->SgEntry[i].SgAddress = segs[i].ds_addr;
                                sg->SgEntry[i].SgByteCount = segs[i].ds_len;
                                aac_sg_entry_tole(&sg->SgEntry[i]);
                        }
                        /* update the FIB size for the s/g count */
                        fib->Header.Size += nseg*sizeof(struct aac_sg_entry);
                } else {
                        struct aac_sg_table64 *sg;
                        sg = (struct aac_sg_table64 *)cm->cm_sgtable;
                        sg->SgCount = htole32(nseg);
                        for (i = 0; i < nseg; i++) {
                                sg->SgEntry64[i].SgAddress = segs[i].ds_addr;
                                sg->SgEntry64[i].SgByteCount = segs[i].ds_len;
                                aac_sg_entry64_tole(&sg->SgEntry64[i]);
                        }
                        /* update the FIB size for the s/g count */
                        fib->Header.Size += nseg*sizeof(struct aac_sg_entry64);
                }
        }

        /* Fix up the address values in the FIB.  Use the command array index
         * instead of a pointer since these fields are only 32 bits.  Shift
         * the SenderFibAddress over to make room for the fast response bit
         * and for the AIF bit
         */
        cm->cm_fib->Header.SenderFibAddress = (cm->cm_index << 2);
        cm->cm_fib->Header.u.ReceiverFibAddress = (u_int32_t)cm->cm_fibphys;

        /* save a pointer to the command for speedy reverse-lookup */
        cm->cm_fib->Header.Handle += cm->cm_index + 1;

        if (cm->cm_passthr_dmat == 0) {
                if (cm->cm_flags & AAC_CMD_DATAIN)
                        bus_dmamap_sync(sc->aac_buffer_dmat, cm->cm_datamap,
                                                        BUS_DMASYNC_PREREAD);
                if (cm->cm_flags & AAC_CMD_DATAOUT)
                        bus_dmamap_sync(sc->aac_buffer_dmat, cm->cm_datamap,
                                                        BUS_DMASYNC_PREWRITE);
        }

        cm->cm_flags |= AAC_CMD_MAPPED;

        if (cm->cm_flags & AAC_CMD_WAIT) {
                aac_fib_header_tole(&fib->Header);
                aacraid_sync_command(sc, AAC_MONKER_SYNCFIB,
                        cm->cm_fibphys, 0, 0, 0, NULL, NULL);
        } else if (sc->flags & AAC_FLAGS_SYNC_MODE) {
                u_int32_t wait = 0;
                sc->aac_sync_cm = cm;
                aac_fib_header_tole(&fib->Header);
                aacraid_sync_command(sc, AAC_MONKER_SYNCFIB,
                        cm->cm_fibphys, 0, 0, 0, &wait, NULL);
        } else {
                int count = 10000000L;
                while (AAC_SEND_COMMAND(sc, cm) != 0) {
                        if (--count == 0) {
                                aac_unmap_command(cm);
                                sc->flags |= AAC_QUEUE_FRZN;
                                aac_requeue_ready(cm);
                        }
                        DELAY(5);                       /* wait 5 usec. */
                }
        }
}

static int 
aac_convert_sgraw2(struct aac_softc *sc, struct aac_raw_io2 *raw,
                                   int pages, int nseg, int nseg_new)
{
        struct aac_sge_ieee1212 *sge;
        int i, j, pos;
        u_int32_t addr_low;

        sge = malloc(nseg_new * sizeof(struct aac_sge_ieee1212), 
                M_AACRAIDBUF, M_NOWAIT|M_ZERO);
        if (sge == NULL)
                return nseg;

        for (i = 1, pos = 1; i < nseg - 1; ++i) {
                for (j = 0; j < raw->sge[i].length / (pages*PAGE_SIZE); ++j) {
                        addr_low = raw->sge[i].addrLow + j * pages * PAGE_SIZE;
                        sge[pos].addrLow = addr_low;
                        sge[pos].addrHigh = raw->sge[i].addrHigh;
                        if (addr_low < raw->sge[i].addrLow)
                                sge[pos].addrHigh++;
                        sge[pos].length = pages * PAGE_SIZE;
                        sge[pos].flags = 0;
                        pos++;
                }
        }
        sge[pos] = raw->sge[nseg-1];
        for (i = 1; i < nseg_new; ++i)
                raw->sge[i] = sge[i];

        free(sge, M_AACRAIDBUF);
        raw->sgeCnt = nseg_new;
        raw->flags |= RIO2_SGL_CONFORMANT;
        raw->sgeNominalSize = pages * PAGE_SIZE;
        return nseg_new;
}

/*
 * Unmap a command from controller-visible space.
 */
static void
aac_unmap_command(struct aac_command *cm)
{
        struct aac_softc *sc;

        sc = cm->cm_sc;
        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        if (!(cm->cm_flags & AAC_CMD_MAPPED))
                return;

        if (cm->cm_datalen != 0 && cm->cm_passthr_dmat == 0) {
                if (cm->cm_flags & AAC_CMD_DATAIN)
                        bus_dmamap_sync(sc->aac_buffer_dmat, cm->cm_datamap,
                                        BUS_DMASYNC_POSTREAD);
                if (cm->cm_flags & AAC_CMD_DATAOUT)
                        bus_dmamap_sync(sc->aac_buffer_dmat, cm->cm_datamap,
                                        BUS_DMASYNC_POSTWRITE);

                bus_dmamap_unload(sc->aac_buffer_dmat, cm->cm_datamap);
        }
        cm->cm_flags &= ~AAC_CMD_MAPPED;
}

/*
 * Hardware Interface
 */

/*
 * Initialize the adapter.
 */
static void
aac_common_map(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
        struct aac_softc *sc;

        sc = (struct aac_softc *)arg;
        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        sc->aac_common_busaddr = segs[0].ds_addr;
}

static int
aac_check_firmware(struct aac_softc *sc)
{
        u_int32_t code, major, minor, maxsize;
        u_int32_t options = 0, atu_size = 0, status, waitCount;
        time_t then;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        /* check if flash update is running */
        if (AAC_GET_FWSTATUS(sc) & AAC_FLASH_UPD_PENDING) {
                then = time_uptime;
                do {
                        code = AAC_GET_FWSTATUS(sc);
                        if (time_uptime > (then + AAC_FWUPD_TIMEOUT)) {
                                device_printf(sc->aac_dev,
                                                  "FATAL: controller not coming ready, "
                                                   "status %x\n", code);
                                return(ENXIO);
                        }
                } while (!(code & AAC_FLASH_UPD_SUCCESS) && !(code & AAC_FLASH_UPD_FAILED));
                /* 
                 * Delay 10 seconds. Because right now FW is doing a soft reset,
                 * do not read scratch pad register at this time
                 */
                waitCount = 10 * 10000;
                while (waitCount) {
                        DELAY(100);             /* delay 100 microseconds */
                        waitCount--;
                }
        }

        /*
         * Wait for the adapter to come ready.
         */
        then = time_uptime;
        do {
                code = AAC_GET_FWSTATUS(sc);
                if (time_uptime > (then + AAC_BOOT_TIMEOUT)) {
                        device_printf(sc->aac_dev,
                                      "FATAL: controller not coming ready, "
                                           "status %x\n", code);
                        return(ENXIO);
                }
        } while (!(code & AAC_UP_AND_RUNNING) || code == 0xffffffff);

        /*
         * Retrieve the firmware version numbers.  Dell PERC2/QC cards with
         * firmware version 1.x are not compatible with this driver.
         */
        if (sc->flags & AAC_FLAGS_PERC2QC) {
                if (aacraid_sync_command(sc, AAC_MONKER_GETKERNVER, 0, 0, 0, 0,
                                     NULL, NULL)) {
                        device_printf(sc->aac_dev,
                                      "Error reading firmware version\n");
                        return (EIO);
                }

                /* These numbers are stored as ASCII! */
                major = (AAC_GET_MAILBOX(sc, 1) & 0xff) - 0x30;
                minor = (AAC_GET_MAILBOX(sc, 2) & 0xff) - 0x30;
                if (major == 1) {
                        device_printf(sc->aac_dev,
                            "Firmware version %d.%d is not supported.\n",
                            major, minor);
                        return (EINVAL);
                }
        }
        /*
         * Retrieve the capabilities/supported options word so we know what
         * work-arounds to enable.  Some firmware revs don't support this
         * command.
         */
        if (aacraid_sync_command(sc, AAC_MONKER_GETINFO, 0, 0, 0, 0, &status, NULL)) {
                if (status != AAC_SRB_STS_INVALID_REQUEST) {
                        device_printf(sc->aac_dev,
                             "RequestAdapterInfo failed\n");
                        return (EIO);
                }
        } else {
                options = AAC_GET_MAILBOX(sc, 1);
                atu_size = AAC_GET_MAILBOX(sc, 2);
                sc->supported_options = options;
                sc->doorbell_mask = AAC_GET_MAILBOX(sc, 3);

                if ((options & AAC_SUPPORTED_4GB_WINDOW) != 0 &&
                    (sc->flags & AAC_FLAGS_NO4GB) == 0)
                        sc->flags |= AAC_FLAGS_4GB_WINDOW;
                if (options & AAC_SUPPORTED_NONDASD)
                        sc->flags |= AAC_FLAGS_ENABLE_CAM;
                if ((options & AAC_SUPPORTED_SGMAP_HOST64) != 0
                        && (sizeof(bus_addr_t) > 4)
                        && (sc->hint_flags & 0x1)) {
                        device_printf(sc->aac_dev,
                            "Enabling 64-bit address support\n");
                        sc->flags |= AAC_FLAGS_SG_64BIT;
                }
                if (sc->aac_if.aif_send_command) {
                        if (options & AAC_SUPPORTED_NEW_COMM_TYPE2)
                                sc->flags |= AAC_FLAGS_NEW_COMM | AAC_FLAGS_NEW_COMM_TYPE2;
                        else if (options & AAC_SUPPORTED_NEW_COMM_TYPE1)
                                sc->flags |= AAC_FLAGS_NEW_COMM | AAC_FLAGS_NEW_COMM_TYPE1;
                        else if ((options & AAC_SUPPORTED_NEW_COMM_TYPE3) ||
                                (options & AAC_SUPPORTED_NEW_COMM_TYPE4))
                                sc->flags |= AAC_FLAGS_NEW_COMM | AAC_FLAGS_NEW_COMM_TYPE34;
                }
                if (options & AAC_SUPPORTED_64BIT_ARRAYSIZE)
                        sc->flags |= AAC_FLAGS_ARRAY_64BIT;
        }

        if (!(sc->flags & AAC_FLAGS_NEW_COMM)) {
                device_printf(sc->aac_dev, "Communication interface not supported!\n");
                return (ENXIO);
        }

        if (sc->hint_flags & 2) {
                device_printf(sc->aac_dev, 
                        "Sync. mode enforced by driver parameter. This will cause a significant performance decrease!\n");
                sc->flags |= AAC_FLAGS_SYNC_MODE;
        } else if (sc->flags & AAC_FLAGS_NEW_COMM_TYPE34) {
                device_printf(sc->aac_dev, 
                        "Async. mode not supported by current driver, sync. mode enforced.\nPlease update driver to get full performance.\n");
                sc->flags |= AAC_FLAGS_SYNC_MODE;
        }

        /* Check for broken hardware that does a lower number of commands */
        sc->aac_max_fibs = (sc->flags & AAC_FLAGS_256FIBS ? 256:512);

        /* Remap mem. resource, if required */
        if (atu_size > rman_get_size(sc->aac_regs_res0)) {
                bus_release_resource(
                        sc->aac_dev, SYS_RES_MEMORY,
                        sc->aac_regs_rid0, sc->aac_regs_res0);
                sc->aac_regs_res0 = bus_alloc_resource_anywhere(
                        sc->aac_dev, SYS_RES_MEMORY, &sc->aac_regs_rid0,
                        atu_size, RF_ACTIVE);
                if (sc->aac_regs_res0 == NULL) {
                        sc->aac_regs_res0 = bus_alloc_resource_any(
                                sc->aac_dev, SYS_RES_MEMORY,
                                &sc->aac_regs_rid0, RF_ACTIVE);
                        if (sc->aac_regs_res0 == NULL) {
                                device_printf(sc->aac_dev,
                                        "couldn't allocate register window\n");
                                return (ENXIO);
                        }
                }
                sc->aac_btag0 = rman_get_bustag(sc->aac_regs_res0);
                sc->aac_bhandle0 = rman_get_bushandle(sc->aac_regs_res0);
        }

        /* Read preferred settings */
        sc->aac_max_fib_size = sizeof(struct aac_fib);
        sc->aac_max_sectors = 128;                              /* 64KB */
        sc->aac_max_aif = 1;
        if (sc->flags & AAC_FLAGS_SG_64BIT)
                sc->aac_sg_tablesize = (AAC_FIB_DATASIZE
                 - sizeof(struct aac_blockwrite64))
                 / sizeof(struct aac_sg_entry64);
        else
                sc->aac_sg_tablesize = (AAC_FIB_DATASIZE
                 - sizeof(struct aac_blockwrite))
                 / sizeof(struct aac_sg_entry);

        if (!aacraid_sync_command(sc, AAC_MONKER_GETCOMMPREF, 0, 0, 0, 0, NULL, NULL)) {
                options = AAC_GET_MAILBOX(sc, 1);
                sc->aac_max_fib_size = (options & 0xFFFF);
                sc->aac_max_sectors = (options >> 16) << 1;
                options = AAC_GET_MAILBOX(sc, 2);
                sc->aac_sg_tablesize = (options >> 16);
                options = AAC_GET_MAILBOX(sc, 3);
                sc->aac_max_fibs = ((options >> 16) & 0xFFFF);
                if (sc->aac_max_fibs == 0 || sc->aac_hwif != AAC_HWIF_SRCV)
                        sc->aac_max_fibs = (options & 0xFFFF);
                options = AAC_GET_MAILBOX(sc, 4);
                sc->aac_max_aif = (options & 0xFFFF);
                options = AAC_GET_MAILBOX(sc, 5);
                sc->aac_max_msix =(sc->flags & AAC_FLAGS_NEW_COMM_TYPE2) ? options : 0;
        }

        maxsize = sc->aac_max_fib_size + 31;
        if (sc->flags & AAC_FLAGS_NEW_COMM_TYPE1) 
                maxsize += sizeof(struct aac_fib_xporthdr);
        if (maxsize > PAGE_SIZE) {
        sc->aac_max_fib_size -= (maxsize - PAGE_SIZE);
                maxsize = PAGE_SIZE;
        }
        sc->aac_max_fibs_alloc = PAGE_SIZE / maxsize;

        if (sc->aac_max_fib_size > sizeof(struct aac_fib)) {
                sc->flags |= AAC_FLAGS_RAW_IO;
                device_printf(sc->aac_dev, "Enable Raw I/O\n");
        }
        if ((sc->flags & AAC_FLAGS_RAW_IO) &&
            (sc->flags & AAC_FLAGS_ARRAY_64BIT)) {
                sc->flags |= AAC_FLAGS_LBA_64BIT;
                device_printf(sc->aac_dev, "Enable 64-bit array\n");
        }

#ifdef AACRAID_DEBUG
        aacraid_get_fw_debug_buffer(sc);
#endif
        return (0);
}

static int
aac_init(struct aac_softc *sc)
{
        struct aac_adapter_init *ip;
        int i, error;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        /* reset rrq index */
        sc->aac_fibs_pushed_no = 0;
        for (i = 0; i < sc->aac_max_msix; i++)
                sc->aac_host_rrq_idx[i] = i * sc->aac_vector_cap;

        /*
         * Fill in the init structure.  This tells the adapter about the
         * physical location of various important shared data structures.
         */
        ip = &sc->aac_common->ac_init;
        ip->InitStructRevision = AAC_INIT_STRUCT_REVISION;
        if (sc->aac_max_fib_size > sizeof(struct aac_fib)) {
                ip->InitStructRevision = AAC_INIT_STRUCT_REVISION_4;
                sc->flags |= AAC_FLAGS_RAW_IO;
        }
        ip->NoOfMSIXVectors = sc->aac_max_msix;

        ip->AdapterFibsPhysicalAddress = sc->aac_common_busaddr +
                                         offsetof(struct aac_common, ac_fibs);
        ip->AdapterFibsVirtualAddress = 0;
        ip->AdapterFibsSize = AAC_ADAPTER_FIBS * sizeof(struct aac_fib);
        ip->AdapterFibAlign = sizeof(struct aac_fib);

        ip->PrintfBufferAddress = sc->aac_common_busaddr +
                                  offsetof(struct aac_common, ac_printf);
        ip->PrintfBufferSize = AAC_PRINTF_BUFSIZE;

        /*
         * The adapter assumes that pages are 4K in size, except on some
         * broken firmware versions that do the page->byte conversion twice,
         * therefore 'assuming' that this value is in 16MB units (2^24).
         * Round up since the granularity is so high.
         */
        ip->HostPhysMemPages = ctob(physmem) / AAC_PAGE_SIZE;
        if (sc->flags & AAC_FLAGS_BROKEN_MEMMAP) {
                ip->HostPhysMemPages =
                    (ip->HostPhysMemPages + AAC_PAGE_SIZE) / AAC_PAGE_SIZE;
        }
        ip->HostElapsedSeconds = time_uptime;   /* reset later if invalid */

        ip->InitFlags = AAC_INITFLAGS_NEW_COMM_SUPPORTED;
        if (sc->flags & AAC_FLAGS_NEW_COMM_TYPE1) {
                ip->InitStructRevision = AAC_INIT_STRUCT_REVISION_6;
                ip->InitFlags |= (AAC_INITFLAGS_NEW_COMM_TYPE1_SUPPORTED |
                        AAC_INITFLAGS_FAST_JBOD_SUPPORTED);
                device_printf(sc->aac_dev, "New comm. interface type1 enabled\n");
        } else if (sc->flags & AAC_FLAGS_NEW_COMM_TYPE2) {
                ip->InitStructRevision = AAC_INIT_STRUCT_REVISION_7;
                ip->InitFlags |= (AAC_INITFLAGS_NEW_COMM_TYPE2_SUPPORTED |
                        AAC_INITFLAGS_FAST_JBOD_SUPPORTED);
                device_printf(sc->aac_dev, "New comm. interface type2 enabled\n");
        }
        ip->MaxNumAif = sc->aac_max_aif;
        ip->HostRRQ_AddrLow = 
                sc->aac_common_busaddr + offsetof(struct aac_common, ac_host_rrq);
        /* always 32-bit address */
        ip->HostRRQ_AddrHigh = 0;

        if (sc->aac_support_opt2 & AAC_SUPPORTED_POWER_MANAGEMENT) {
                ip->InitFlags |= AAC_INITFLAGS_DRIVER_SUPPORTS_PM;
                ip->InitFlags |= AAC_INITFLAGS_DRIVER_USES_UTC_TIME;
                device_printf(sc->aac_dev, "Power Management enabled\n");
        }

        ip->MaxIoCommands = sc->aac_max_fibs;
        ip->MaxIoSize = AAC_MAXIO_SIZE(sc);
        ip->MaxFibSize = sc->aac_max_fib_size;

        aac_adapter_init_tole(ip);

        /*
         * Do controller-type-specific initialisation
         */
        AAC_MEM0_SETREG4(sc, AAC_SRC_ODBR_C, ~0);

        /*
         * Give the init structure to the controller.
         */
        if (aacraid_sync_command(sc, AAC_MONKER_INITSTRUCT,
                             sc->aac_common_busaddr +
                             offsetof(struct aac_common, ac_init), 0, 0, 0,
                             NULL, NULL)) {
                device_printf(sc->aac_dev,
                              "error establishing init structure\n");
                error = EIO;
                goto out;
        }

        /*
         * Check configuration issues 
         */
        if ((error = aac_check_config(sc)) != 0)
                goto out;

        error = 0;
out:
        return(error);
}

static void
aac_define_int_mode(struct aac_softc *sc)
{
        device_t dev;
        int cap, msi_count, error = 0;
        uint32_t val;

        dev = sc->aac_dev;

        if (sc->flags & AAC_FLAGS_SYNC_MODE) {
                device_printf(dev, "using line interrupts\n");
                sc->aac_max_msix = 1;
                sc->aac_vector_cap = sc->aac_max_fibs;
                return;
        }

        /* max. vectors from AAC_MONKER_GETCOMMPREF */
        if (sc->aac_max_msix == 0) {
                if (sc->aac_hwif == AAC_HWIF_SRC) {
                        msi_count = 1;
                        if ((error = pci_alloc_msi(dev, &msi_count)) != 0) {
                                device_printf(dev, "alloc msi failed - err=%d; "
                                    "will use INTx\n", error);
                                pci_release_msi(dev);
                        } else {
                                sc->msi_tupelo = TRUE;
                        }
                }
                if (sc->msi_tupelo)
                        device_printf(dev, "using MSI interrupts\n");
                else
                        device_printf(dev, "using line interrupts\n");

                sc->aac_max_msix = 1;
                sc->aac_vector_cap = sc->aac_max_fibs;
                return;
        }

        /* OS capability */
        msi_count = pci_msix_count(dev);
        if (msi_count > AAC_MAX_MSIX)
                msi_count = AAC_MAX_MSIX;
        if (msi_count > sc->aac_max_msix)
                msi_count = sc->aac_max_msix;
        if (msi_count == 0 || (error = pci_alloc_msix(dev, &msi_count)) != 0) {
                device_printf(dev, "alloc msix failed - msi_count=%d, err=%d; "
                                   "will try MSI\n", msi_count, error);
                pci_release_msi(dev);
        } else {
                sc->msi_enabled = TRUE;
                device_printf(dev, "using MSI-X interrupts (%u vectors)\n",
                        msi_count);
        }

        if (!sc->msi_enabled) {
                msi_count = 1;
                if ((error = pci_alloc_msi(dev, &msi_count)) != 0) {
                        device_printf(dev, "alloc msi failed - err=%d; "
                                           "will use INTx\n", error);
                        pci_release_msi(dev);
                } else {
                        sc->msi_enabled = TRUE;
                        device_printf(dev, "using MSI interrupts\n");
                }
        }

        if (sc->msi_enabled) {
                /* now read controller capability from PCI config. space */
                cap = aac_find_pci_capability(sc, PCIY_MSIX);   
                val = (cap != 0 ? pci_read_config(dev, cap + 2, 2) : 0);        
                if (!(val & AAC_PCI_MSI_ENABLE)) {
                        pci_release_msi(dev);
                        sc->msi_enabled = FALSE;
                }
        }

        if (!sc->msi_enabled) {
                device_printf(dev, "using legacy interrupts\n");
                sc->aac_max_msix = 1;
        } else {
                AAC_ACCESS_DEVREG(sc, AAC_ENABLE_MSIX);
                if (sc->aac_max_msix > msi_count)
                        sc->aac_max_msix = msi_count;
        }
        sc->aac_vector_cap = sc->aac_max_fibs / sc->aac_max_msix;

        fwprintf(sc, HBA_FLAGS_DBG_DEBUG_B, "msi_enabled %d vector_cap %d max_fibs %d max_msix %d",
                sc->msi_enabled,sc->aac_vector_cap, sc->aac_max_fibs, sc->aac_max_msix);
}

static int
aac_find_pci_capability(struct aac_softc *sc, int cap)
{
        device_t dev;
        uint32_t status;
        uint8_t ptr;

        dev = sc->aac_dev;

        status = pci_read_config(dev, PCIR_STATUS, 2);
        if (!(status & PCIM_STATUS_CAPPRESENT))
                return (0);

        status = pci_read_config(dev, PCIR_HDRTYPE, 1);
        switch (status & PCIM_HDRTYPE) {
        case 0:
        case 1:
                ptr = PCIR_CAP_PTR;
                break;
        case 2:
                ptr = PCIR_CAP_PTR_2;
                break;
        default:
                return (0);
                break;
        }
        ptr = pci_read_config(dev, ptr, 1);

        while (ptr != 0) {
                int next, val;
                next = pci_read_config(dev, ptr + PCICAP_NEXTPTR, 1);
                val = pci_read_config(dev, ptr + PCICAP_ID, 1);
                if (val == cap)
                        return (ptr);
                ptr = next;
        }

        return (0);
}

static int
aac_setup_intr(struct aac_softc *sc)
{
        int i, msi_count, rid;
        struct resource *res;
        void *tag;

        msi_count = sc->aac_max_msix;
        rid = ((sc->msi_enabled || sc->msi_tupelo)? 1:0);

        for (i = 0; i < msi_count; i++, rid++) {
                if ((res = bus_alloc_resource_any(sc->aac_dev,SYS_RES_IRQ, &rid,
                        RF_SHAREABLE | RF_ACTIVE)) == NULL) {
                        device_printf(sc->aac_dev,"can't allocate interrupt\n");
                        return (EINVAL);
                }
                sc->aac_irq_rid[i] = rid;
                sc->aac_irq[i] = res;
                if (aac_bus_setup_intr(sc->aac_dev, res, 
                        INTR_MPSAFE | INTR_TYPE_BIO, NULL, 
                        aacraid_new_intr_type1, &sc->aac_msix[i], &tag)) {
                        device_printf(sc->aac_dev, "can't set up interrupt\n");
                        return (EINVAL);
                }
                sc->aac_msix[i].vector_no = i;
                sc->aac_msix[i].sc = sc;
                sc->aac_intr[i] = tag;
        }

        return (0);
}

static int
aac_check_config(struct aac_softc *sc)
{
        struct aac_fib *fib;
        struct aac_cnt_config *ccfg;
        struct aac_cf_status_hdr *cf_shdr;
        int rval;

        mtx_lock(&sc->aac_io_lock);
        aac_alloc_sync_fib(sc, &fib);

        ccfg = (struct aac_cnt_config *)&fib->data[0];
        bzero(ccfg, sizeof (*ccfg) - CT_PACKET_SIZE);
        ccfg->Command = VM_ContainerConfig;
        ccfg->CTCommand.command = CT_GET_CONFIG_STATUS;
        ccfg->CTCommand.param[CNT_SIZE] = sizeof(struct aac_cf_status_hdr);

        aac_cnt_config_tole(ccfg);
        rval = aac_sync_fib(sc, ContainerCommand, 0, fib,
                sizeof (struct aac_cnt_config));
        aac_cnt_config_toh(ccfg);

        cf_shdr = (struct aac_cf_status_hdr *)ccfg->CTCommand.data;
        if (rval == 0 && ccfg->Command == ST_OK &&
                ccfg->CTCommand.param[0] == CT_OK) {
                if (le32toh(cf_shdr->action) <= CFACT_PAUSE) {
                        bzero(ccfg, sizeof (*ccfg) - CT_PACKET_SIZE);
                        ccfg->Command = VM_ContainerConfig;
                        ccfg->CTCommand.command = CT_COMMIT_CONFIG;

                        aac_cnt_config_tole(ccfg);
                        rval = aac_sync_fib(sc, ContainerCommand, 0, fib,
                                sizeof (struct aac_cnt_config));
                        aac_cnt_config_toh(ccfg);

                        if (rval == 0 && ccfg->Command == ST_OK &&
                                ccfg->CTCommand.param[0] == CT_OK) {
                                /* successful completion */
                                rval = 0;
                        } else {
                                /* auto commit aborted due to error(s) */
                                rval = -2;
                        }
                } else {
                        /* auto commit aborted due to adapter indicating
                           config. issues too dangerous to auto commit  */
                        rval = -3;
                }
        } else {
                /* error */
                rval = -1;
        }

        aac_release_sync_fib(sc);
        mtx_unlock(&sc->aac_io_lock);
        return(rval);
}

/*
 * Send a synchronous command to the controller and wait for a result.
 * Indicate if the controller completed the command with an error status.
 */
int
aacraid_sync_command(struct aac_softc *sc, u_int32_t command,
                 u_int32_t arg0, u_int32_t arg1, u_int32_t arg2, u_int32_t arg3,
                 u_int32_t *sp, u_int32_t *r1)
{
        time_t then;
        u_int32_t status;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        /* populate the mailbox */
        AAC_SET_MAILBOX(sc, command, arg0, arg1, arg2, arg3);

        /* ensure the sync command doorbell flag is cleared */
        if (!sc->msi_enabled)
                AAC_CLEAR_ISTATUS(sc, AAC_DB_SYNC_COMMAND);

        /* then set it to signal the adapter */
        AAC_QNOTIFY(sc, AAC_DB_SYNC_COMMAND);

        if ((command != AAC_MONKER_SYNCFIB) || (sp == NULL) || (*sp != 0)) {
                /* spin waiting for the command to complete */
                then = time_uptime;
                do {
                        if (time_uptime > (then + AAC_SYNC_TIMEOUT)) {
                                fwprintf(sc, HBA_FLAGS_DBG_ERROR_B, "timed out");
                                return(EIO);
                        }
                } while (!(AAC_GET_ISTATUS(sc) & AAC_DB_SYNC_COMMAND));

                /* clear the completion flag */
                AAC_CLEAR_ISTATUS(sc, AAC_DB_SYNC_COMMAND);

                /* get the command status */
                status = AAC_GET_MAILBOX(sc, 0);
                if (sp != NULL)
                        *sp = status;

                /* return parameter */
                if (r1 != NULL) 
                        *r1 = AAC_GET_MAILBOX(sc, 1);

                if (status != AAC_SRB_STS_SUCCESS)
                        return (-1);
        }
        return(0);
}

static int
aac_sync_fib(struct aac_softc *sc, u_int32_t command, u_int32_t xferstate,
                 struct aac_fib *fib, u_int16_t datasize)
{
        uint32_t ReceiverFibAddress;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
        mtx_assert(&sc->aac_io_lock, MA_OWNED);

        if (datasize > AAC_FIB_DATASIZE)
                return(EINVAL);

        /*
         * Set up the sync FIB
         */
        fib->Header.XferState = AAC_FIBSTATE_HOSTOWNED |
                                AAC_FIBSTATE_INITIALISED |
                                AAC_FIBSTATE_EMPTY;
        fib->Header.XferState |= xferstate;
        fib->Header.Command = command;
        fib->Header.StructType = AAC_FIBTYPE_TFIB;
        fib->Header.Size = sizeof(struct aac_fib_header) + datasize;
        fib->Header.SenderSize = sizeof(struct aac_fib);
        fib->Header.SenderFibAddress = 0;       /* Not needed */
        ReceiverFibAddress = sc->aac_common_busaddr +
                offsetof(struct aac_common, ac_sync_fib);
        fib->Header.u.ReceiverFibAddress = ReceiverFibAddress;
        aac_fib_header_tole(&fib->Header);

        /*
         * Give the FIB to the controller, wait for a response.
         */
        if (aacraid_sync_command(sc, AAC_MONKER_SYNCFIB,
                ReceiverFibAddress, 0, 0, 0, NULL, NULL)) {
                fwprintf(sc, HBA_FLAGS_DBG_ERROR_B, "IO error");
                aac_fib_header_toh(&fib->Header);
                return(EIO);
        }

        aac_fib_header_toh(&fib->Header);
        return (0);
}

/*
 * Check for commands that have been outstanding for a suspiciously long time,
 * and complain about them.
 */
static void
aac_timeout(struct aac_softc *sc)
{
        struct aac_command *cm;
        time_t deadline;
        int timedout;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
        /*
         * Traverse the busy command list, bitch about late commands once
         * only.
         */
        timedout = 0;
        deadline = time_uptime - AAC_CMD_TIMEOUT;
        TAILQ_FOREACH(cm, &sc->aac_busy, cm_link) {
                if (cm->cm_timestamp < deadline) {
                        device_printf(sc->aac_dev,
                                      "COMMAND %p TIMEOUT AFTER %d SECONDS\n",
                                      cm, (int)(time_uptime-cm->cm_timestamp));
                        AAC_PRINT_FIB(sc, cm->cm_fib);
                        timedout++;
                }
        }

        if (timedout) 
                aac_reset_adapter(sc);
        aacraid_print_queues(sc);
}

/*
 * Interface Function Vectors
 */

/*
 * Read the current firmware status word.
 */
static int
aac_src_get_fwstatus(struct aac_softc *sc)
{
        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        return(AAC_MEM0_GETREG4(sc, AAC_SRC_OMR));
}

/*
 * Notify the controller of a change in a given queue
 */
static void
aac_src_qnotify(struct aac_softc *sc, int qbit)
{
        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        AAC_MEM0_SETREG4(sc, AAC_SRC_IDBR, qbit << AAC_SRC_IDR_SHIFT);
}

/*
 * Get the interrupt reason bits
 */
static int
aac_src_get_istatus(struct aac_softc *sc)
{
        int val;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        if (sc->msi_enabled) {
                val = AAC_MEM0_GETREG4(sc, AAC_SRC_ODBR_MSI);
                if (val & AAC_MSI_SYNC_STATUS)
                        val = AAC_DB_SYNC_COMMAND;
                else
                        val = 0;
        } else {
                val = AAC_MEM0_GETREG4(sc, AAC_SRC_ODBR_R) >> AAC_SRC_ODR_SHIFT;
        }
        return(val);
}

/*
 * Clear some interrupt reason bits
 */
static void
aac_src_clear_istatus(struct aac_softc *sc, int mask)
{
        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        if (sc->msi_enabled) {
                if (mask == AAC_DB_SYNC_COMMAND)
                        AAC_ACCESS_DEVREG(sc, AAC_CLEAR_SYNC_BIT);
        } else {
                AAC_MEM0_SETREG4(sc, AAC_SRC_ODBR_C, mask << AAC_SRC_ODR_SHIFT);
        }
}

/*
 * Populate the mailbox and set the command word
 */
static void
aac_src_set_mailbox(struct aac_softc *sc, u_int32_t command, u_int32_t arg0,
                    u_int32_t arg1, u_int32_t arg2, u_int32_t arg3)
{
        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        AAC_MEM0_SETREG4(sc, AAC_SRC_MAILBOX, command);
        AAC_MEM0_SETREG4(sc, AAC_SRC_MAILBOX + 4, arg0);
        AAC_MEM0_SETREG4(sc, AAC_SRC_MAILBOX + 8, arg1);
        AAC_MEM0_SETREG4(sc, AAC_SRC_MAILBOX + 12, arg2);
        AAC_MEM0_SETREG4(sc, AAC_SRC_MAILBOX + 16, arg3);
}

static void
aac_srcv_set_mailbox(struct aac_softc *sc, u_int32_t command, u_int32_t arg0,
                    u_int32_t arg1, u_int32_t arg2, u_int32_t arg3)
{
        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        AAC_MEM0_SETREG4(sc, AAC_SRCV_MAILBOX, command);
        AAC_MEM0_SETREG4(sc, AAC_SRCV_MAILBOX + 4, arg0);
        AAC_MEM0_SETREG4(sc, AAC_SRCV_MAILBOX + 8, arg1);
        AAC_MEM0_SETREG4(sc, AAC_SRCV_MAILBOX + 12, arg2);
        AAC_MEM0_SETREG4(sc, AAC_SRCV_MAILBOX + 16, arg3);
}

/*
 * Fetch the immediate command status word
 */
static int
aac_src_get_mailbox(struct aac_softc *sc, int mb)
{
        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        return(AAC_MEM0_GETREG4(sc, AAC_SRC_MAILBOX + (mb * 4)));
}

static int
aac_srcv_get_mailbox(struct aac_softc *sc, int mb)
{
        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        return(AAC_MEM0_GETREG4(sc, AAC_SRCV_MAILBOX + (mb * 4)));
}

/*
 * Set/clear interrupt masks
 */
static void
aac_src_access_devreg(struct aac_softc *sc, int mode)
{
        u_int32_t val;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        switch (mode) {
        case AAC_ENABLE_INTERRUPT:
                AAC_MEM0_SETREG4(sc, AAC_SRC_OIMR, 
                        (sc->msi_enabled ? AAC_INT_ENABLE_TYPE1_MSIX :
                                           AAC_INT_ENABLE_TYPE1_INTX));
                break;

        case AAC_DISABLE_INTERRUPT:
                AAC_MEM0_SETREG4(sc, AAC_SRC_OIMR, AAC_INT_DISABLE_ALL);
                break;

        case AAC_ENABLE_MSIX:
                /* set bit 6 */
                val = AAC_MEM0_GETREG4(sc, AAC_SRC_IDBR);
                val |= 0x40;
                AAC_MEM0_SETREG4(sc, AAC_SRC_IDBR, val);                
                AAC_MEM0_GETREG4(sc, AAC_SRC_IDBR);
                /* unmask int. */
                val = PMC_ALL_INTERRUPT_BITS;
                AAC_MEM0_SETREG4(sc, AAC_SRC_IOAR, val);
                val = AAC_MEM0_GETREG4(sc, AAC_SRC_OIMR);
                AAC_MEM0_SETREG4(sc, AAC_SRC_OIMR, 
                        val & (~(PMC_GLOBAL_INT_BIT2 | PMC_GLOBAL_INT_BIT0)));
                break;

        case AAC_DISABLE_MSIX:
                /* reset bit 6 */
                val = AAC_MEM0_GETREG4(sc, AAC_SRC_IDBR);
                val &= ~0x40;
                AAC_MEM0_SETREG4(sc, AAC_SRC_IDBR, val);                
                AAC_MEM0_GETREG4(sc, AAC_SRC_IDBR);
                break;

        case AAC_CLEAR_AIF_BIT:
                /* set bit 5 */
                val = AAC_MEM0_GETREG4(sc, AAC_SRC_IDBR);
                val |= 0x20;
                AAC_MEM0_SETREG4(sc, AAC_SRC_IDBR, val);                
                AAC_MEM0_GETREG4(sc, AAC_SRC_IDBR);
                break;

        case AAC_CLEAR_SYNC_BIT:
                /* set bit 4 */
                val = AAC_MEM0_GETREG4(sc, AAC_SRC_IDBR);
                val |= 0x10;
                AAC_MEM0_SETREG4(sc, AAC_SRC_IDBR, val);                
                AAC_MEM0_GETREG4(sc, AAC_SRC_IDBR);
                break;

        case AAC_ENABLE_INTX:
                /* set bit 7 */
                val = AAC_MEM0_GETREG4(sc, AAC_SRC_IDBR);
                val |= 0x80;
                AAC_MEM0_SETREG4(sc, AAC_SRC_IDBR, val);                
                AAC_MEM0_GETREG4(sc, AAC_SRC_IDBR);
                /* unmask int. */
                val = PMC_ALL_INTERRUPT_BITS;
                AAC_MEM0_SETREG4(sc, AAC_SRC_IOAR, val);
                val = AAC_MEM0_GETREG4(sc, AAC_SRC_OIMR);
                AAC_MEM0_SETREG4(sc, AAC_SRC_OIMR, 
                        val & (~(PMC_GLOBAL_INT_BIT2)));
                break;

        default:
                break;
        }
}

/*
 * New comm. interface: Send command functions
 */
static int
aac_src_send_command(struct aac_softc *sc, struct aac_command *cm)
{
        struct aac_fib_xporthdr *pFibX;
        u_int32_t fibsize, high_addr;
        u_int64_t address;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "send command (new comm. type1)");

        if (sc->msi_enabled && cm->cm_fib->Header.Command != AifRequest &&
                sc->aac_max_msix > 1) { 
                u_int16_t vector_no, first_choice = 0xffff;

                vector_no = sc->aac_fibs_pushed_no % sc->aac_max_msix;
                do {
                        vector_no += 1;
                        if (vector_no == sc->aac_max_msix)
                                vector_no = 1;
                        if (sc->aac_rrq_outstanding[vector_no] < 
                                sc->aac_vector_cap)
                                break;
                        if (0xffff == first_choice)
                                first_choice = vector_no;
                        else if (vector_no == first_choice)
                                break;
                } while (1);
                if (vector_no == first_choice)
                        vector_no = 0;
                sc->aac_rrq_outstanding[vector_no]++;
                if (sc->aac_fibs_pushed_no == 0xffffffff)
                        sc->aac_fibs_pushed_no = 0;
                else
                        sc->aac_fibs_pushed_no++; 
                
                cm->cm_fib->Header.Handle += (vector_no << 16);
        }               

        if (sc->flags & AAC_FLAGS_NEW_COMM_TYPE2) {
                /* Calculate the amount to the fibsize bits */
                fibsize = (cm->cm_fib->Header.Size + 127) / 128 - 1; 
                /* Fill new FIB header */
                address = cm->cm_fibphys;
                high_addr = (u_int32_t)(address >> 32);
                if (high_addr == 0L) {
                        cm->cm_fib->Header.StructType = AAC_FIBTYPE_TFIB2;
                        cm->cm_fib->Header.u.TimeStamp = 0L;
                } else {
                        cm->cm_fib->Header.StructType = AAC_FIBTYPE_TFIB2_64;
                        cm->cm_fib->Header.u.SenderFibAddressHigh = high_addr;
                }
                cm->cm_fib->Header.SenderFibAddress = (u_int32_t)address;
        } else {
                /* Calculate the amount to the fibsize bits */
                fibsize = (sizeof(struct aac_fib_xporthdr) + 
                   cm->cm_fib->Header.Size + 127) / 128 - 1; 
                /* Fill XPORT header */ 
                pFibX = (struct aac_fib_xporthdr *)
                        ((unsigned char *)cm->cm_fib - sizeof(struct aac_fib_xporthdr));
                pFibX->Handle = cm->cm_fib->Header.Handle;
                pFibX->HostAddress = cm->cm_fibphys;
                pFibX->Size = cm->cm_fib->Header.Size;
                aac_fib_xporthdr_tole(pFibX);
                address = cm->cm_fibphys - sizeof(struct aac_fib_xporthdr);
                high_addr = (u_int32_t)(address >> 32);
        }

        aac_fib_header_tole(&cm->cm_fib->Header);

        if (fibsize > 31) 
                fibsize = 31;
        aac_enqueue_busy(cm);
        if (high_addr) {
                AAC_MEM0_SETREG4(sc, AAC_SRC_IQUE64_H, high_addr);
                AAC_MEM0_SETREG4(sc, AAC_SRC_IQUE64_L, (u_int32_t)address + fibsize);
        } else {
                AAC_MEM0_SETREG4(sc, AAC_SRC_IQUE32, (u_int32_t)address + fibsize);
        }
        return 0;
}

/*
 * New comm. interface: get, set outbound queue index
 */
static int
aac_src_get_outb_queue(struct aac_softc *sc)
{
        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        return(-1);
}

static void
aac_src_set_outb_queue(struct aac_softc *sc, int index)
{
        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
}

/*
 * Debugging and Diagnostics
 */

/*
 * Print some information about the controller.
 */
static void
aac_describe_controller(struct aac_softc *sc)
{
        struct aac_fib *fib;
        struct aac_adapter_info *info;
        char *adapter_type = "Adaptec RAID controller";

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        mtx_lock(&sc->aac_io_lock);
        aac_alloc_sync_fib(sc, &fib);

        if (sc->supported_options & AAC_SUPPORTED_SUPPLEMENT_ADAPTER_INFO) {
                fib->data[0] = 0;
                if (aac_sync_fib(sc, RequestSupplementAdapterInfo, 0, fib, 1)) 
                        device_printf(sc->aac_dev, "RequestSupplementAdapterInfo failed\n");
                else {
                        struct aac_supplement_adapter_info *supp_info;

                        supp_info = ((struct aac_supplement_adapter_info *)&fib->data[0]); 
                        adapter_type = (char *)supp_info->AdapterTypeText;
                        sc->aac_feature_bits = le32toh(supp_info->FeatureBits);
                        sc->aac_support_opt2 = le32toh(supp_info->SupportedOptions2);
                }
        }
        device_printf(sc->aac_dev, "%s, aacraid driver %d.%d.%d-%d\n",
                adapter_type,
                AAC_DRIVER_MAJOR_VERSION, AAC_DRIVER_MINOR_VERSION,
                AAC_DRIVER_BUGFIX_LEVEL, AAC_DRIVER_BUILD);

        fib->data[0] = 0;
        if (aac_sync_fib(sc, RequestAdapterInfo, 0, fib, 1)) {
                device_printf(sc->aac_dev, "RequestAdapterInfo failed\n");
                aac_release_sync_fib(sc);
                mtx_unlock(&sc->aac_io_lock);
                return;
        }

        /* save the kernel revision structure for later use */
        info = (struct aac_adapter_info *)&fib->data[0];
        aac_adapter_info_toh(info);
        sc->aac_revision = info->KernelRevision;

        if (bootverbose) {
                device_printf(sc->aac_dev, "%s %dMHz, %dMB memory "
                    "(%dMB cache, %dMB execution), %s\n",
                    aac_describe_code(aac_cpu_variant, info->CpuVariant),
                    info->ClockSpeed, info->TotalMem / (1024 * 1024),
                    info->BufferMem / (1024 * 1024),
                    info->ExecutionMem / (1024 * 1024),
                    aac_describe_code(aac_battery_platform,
                    info->batteryPlatform));

                device_printf(sc->aac_dev,
                    "Kernel %d.%d-%d, Build %d, S/N %6X\n",
                    info->KernelRevision.external.comp.major,
                    info->KernelRevision.external.comp.minor,
                    info->KernelRevision.external.comp.dash,
                    info->KernelRevision.buildNumber,
                    (u_int32_t)(info->SerialNumber & 0xffffff));

                device_printf(sc->aac_dev, "Supported Options=%b\n",
                              sc->supported_options,
                              "\20"
                              "\1SNAPSHOT"
                              "\2CLUSTERS"
                              "\3WCACHE"
                              "\4DATA64"
                              "\5HOSTTIME"
                              "\6RAID50"
                              "\7WINDOW4GB"
                              "\10SCSIUPGD"
                              "\11SOFTERR"
                              "\12NORECOND"
                              "\13SGMAP64"
                              "\14ALARM"
                              "\15NONDASD"
                              "\16SCSIMGT"
                              "\17RAIDSCSI"
                              "\21ADPTINFO"
                              "\22NEWCOMM"
                              "\23ARRAY64BIT"
                              "\24HEATSENSOR");
        }

        aac_release_sync_fib(sc);
        mtx_unlock(&sc->aac_io_lock);
}

/*
 * Look up a text description of a numeric error code and return a pointer to
 * same.
 */
static char *
aac_describe_code(struct aac_code_lookup *table, u_int32_t code)
{
        int i;

        for (i = 0; table[i].string != NULL; i++)
                if (table[i].code == code)
                        return(table[i].string);
        return(table[i + 1].string);
}

/*
 * Management Interface
 */

static int
aac_open(struct cdev *dev, int flags, int fmt, struct thread *td)
{
        struct aac_softc *sc;

        sc = dev->si_drv1;
        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
        device_busy(sc->aac_dev);
        devfs_set_cdevpriv(sc, aac_cdevpriv_dtor);
        return 0;
}

static int
aac_ioctl(struct cdev *dev, u_long cmd, caddr_t arg, int flag, struct thread *td)
{
        union aac_statrequest *as;
        struct aac_softc *sc;
        int error = 0;

        as = (union aac_statrequest *)arg;
        sc = dev->si_drv1;
        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        switch (cmd) {
        case AACIO_STATS:
                switch (as->as_item) {
                case AACQ_FREE:
                case AACQ_READY:
                case AACQ_BUSY:
                        bcopy(&sc->aac_qstat[as->as_item], &as->as_qstat,
                              sizeof(struct aac_qstat));
                        break;
                default:
                        error = ENOENT;
                        break;
                }
        break;

        case FSACTL_SENDFIB:
        case FSACTL_SEND_LARGE_FIB:
                arg = *(caddr_t*)arg;
        case FSACTL_LNX_SENDFIB:
        case FSACTL_LNX_SEND_LARGE_FIB:
                fwprintf(sc, HBA_FLAGS_DBG_IOCTL_COMMANDS_B, "FSACTL_SENDFIB");
                error = aac_ioctl_sendfib(sc, arg);
                break;
        case FSACTL_SEND_RAW_SRB:
                arg = *(caddr_t*)arg;
        case FSACTL_LNX_SEND_RAW_SRB:
                fwprintf(sc, HBA_FLAGS_DBG_IOCTL_COMMANDS_B, "FSACTL_SEND_RAW_SRB");
                error = aac_ioctl_send_raw_srb(sc, arg);
                break;
        case FSACTL_AIF_THREAD:
        case FSACTL_LNX_AIF_THREAD:
                fwprintf(sc, HBA_FLAGS_DBG_IOCTL_COMMANDS_B, "FSACTL_AIF_THREAD");
                error = EINVAL;
                break;
        case FSACTL_OPEN_GET_ADAPTER_FIB:
                arg = *(caddr_t*)arg;
        case FSACTL_LNX_OPEN_GET_ADAPTER_FIB:
                fwprintf(sc, HBA_FLAGS_DBG_IOCTL_COMMANDS_B, "FSACTL_OPEN_GET_ADAPTER_FIB");
                error = aac_open_aif(sc, arg);
                break;
        case FSACTL_GET_NEXT_ADAPTER_FIB:
                arg = *(caddr_t*)arg;
        case FSACTL_LNX_GET_NEXT_ADAPTER_FIB:
                fwprintf(sc, HBA_FLAGS_DBG_IOCTL_COMMANDS_B, "FSACTL_GET_NEXT_ADAPTER_FIB");
                error = aac_getnext_aif(sc, arg);
                break;
        case FSACTL_CLOSE_GET_ADAPTER_FIB:
                arg = *(caddr_t*)arg;
        case FSACTL_LNX_CLOSE_GET_ADAPTER_FIB:
                fwprintf(sc, HBA_FLAGS_DBG_IOCTL_COMMANDS_B, "FSACTL_CLOSE_GET_ADAPTER_FIB");
                error = aac_close_aif(sc, arg);
                break;
        case FSACTL_MINIPORT_REV_CHECK:
                arg = *(caddr_t*)arg;
        case FSACTL_LNX_MINIPORT_REV_CHECK:
                fwprintf(sc, HBA_FLAGS_DBG_IOCTL_COMMANDS_B, "FSACTL_MINIPORT_REV_CHECK");
                error = aac_rev_check(sc, arg);
                break;
        case FSACTL_QUERY_DISK:
                arg = *(caddr_t*)arg;
        case FSACTL_LNX_QUERY_DISK:
                fwprintf(sc, HBA_FLAGS_DBG_IOCTL_COMMANDS_B, "FSACTL_QUERY_DISK");
                error = aac_query_disk(sc, arg);
                break;
        case FSACTL_DELETE_DISK:
        case FSACTL_LNX_DELETE_DISK:
                /*
                 * We don't trust the underland to tell us when to delete a
                 * container, rather we rely on an AIF coming from the
                 * controller
                 */
                error = 0;
                break;
        case FSACTL_GET_PCI_INFO:
                arg = *(caddr_t*)arg;
        case FSACTL_LNX_GET_PCI_INFO:
                fwprintf(sc, HBA_FLAGS_DBG_IOCTL_COMMANDS_B, "FSACTL_GET_PCI_INFO");
                error = aac_get_pci_info(sc, arg);
                break;
        case FSACTL_GET_FEATURES:
                arg = *(caddr_t*)arg;
        case FSACTL_LNX_GET_FEATURES:
                fwprintf(sc, HBA_FLAGS_DBG_IOCTL_COMMANDS_B, "FSACTL_GET_FEATURES");
                error = aac_supported_features(sc, arg);
                break;
        default:
                fwprintf(sc, HBA_FLAGS_DBG_IOCTL_COMMANDS_B, "unsupported cmd 0x%lx\n", cmd);
                error = EINVAL;
                break;
        }
        return(error);
}

static int
aac_poll(struct cdev *dev, int poll_events, struct thread *td)
{
        struct aac_softc *sc;
        struct aac_fib_context *ctx;
        int revents;

        sc = dev->si_drv1;
        revents = 0;

        mtx_lock(&sc->aac_io_lock);
        if ((poll_events & (POLLRDNORM | POLLIN)) != 0) {
                for (ctx = sc->fibctx; ctx; ctx = ctx->next) {
                        if (ctx->ctx_idx != sc->aifq_idx || ctx->ctx_wrap) {
                                revents |= poll_events & (POLLIN | POLLRDNORM);
                                break;
                        }
                }
        }
        mtx_unlock(&sc->aac_io_lock);

        if (revents == 0) {
                if (poll_events & (POLLIN | POLLRDNORM))
                        selrecord(td, &sc->rcv_select);
        }

        return (revents);
}

static void
aac_ioctl_event(struct aac_softc *sc, struct aac_event *event, void *arg)
{

        switch (event->ev_type) {
        case AAC_EVENT_CMFREE:
                mtx_assert(&sc->aac_io_lock, MA_OWNED);
                if (aacraid_alloc_command(sc, (struct aac_command **)arg)) {
                        aacraid_add_event(sc, event);
                        return;
                }
                free(event, M_AACRAIDBUF);
                wakeup(arg);
                break;
        default:
                break;
        }
}

/*
 * Send a FIB supplied from userspace
 *
 * Currently, sending a FIB from userspace in BE hosts is not supported.
 * There are several things that need to be considered in order to
 * support this, such as:
 * - At least the FIB data part from userspace should already be in LE,
 *   or else the kernel would need to know all FIB types to be able to
 *   correctly convert it to BE.
 * - SG tables are converted to BE by aacraid_map_command_sg(). This
 *   conversion should be supressed if the FIB comes from userspace.
 * - aacraid_wait_command() calls functions that convert the FIB header
 *   to LE. But if the header is already in LE, the conversion should not
 *   be performed.
 */
static int
aac_ioctl_sendfib(struct aac_softc *sc, caddr_t ufib)
{
        struct aac_command *cm;
        int size, error;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        cm = NULL;

        /*
         * Get a command
         */
        mtx_lock(&sc->aac_io_lock);
        if (aacraid_alloc_command(sc, &cm)) {
                struct aac_event *event;

                event = malloc(sizeof(struct aac_event), M_AACRAIDBUF,
                    M_NOWAIT | M_ZERO);
                if (event == NULL) {
                        error = EBUSY;
                        mtx_unlock(&sc->aac_io_lock);
                        goto out;
                }
                event->ev_type = AAC_EVENT_CMFREE;
                event->ev_callback = aac_ioctl_event;
                event->ev_arg = &cm;
                aacraid_add_event(sc, event);
                msleep(cm, &sc->aac_io_lock, 0, "aacraid_ctlsfib", 0);
        }
        mtx_unlock(&sc->aac_io_lock);

        /*
         * Fetch the FIB header, then re-copy to get data as well.
         */
        if ((error = copyin(ufib, cm->cm_fib,
                            sizeof(struct aac_fib_header))) != 0)
                goto out;
        size = cm->cm_fib->Header.Size + sizeof(struct aac_fib_header);
        if (size > sc->aac_max_fib_size) {
                device_printf(sc->aac_dev, "incoming FIB oversized (%d > %d)\n",
                              size, sc->aac_max_fib_size);
                size = sc->aac_max_fib_size;
        }
        if ((error = copyin(ufib, cm->cm_fib, size)) != 0)
                goto out;
        cm->cm_fib->Header.Size = size;
        cm->cm_timestamp = time_uptime;
        cm->cm_datalen = 0;

        /*
         * Pass the FIB to the controller, wait for it to complete.
         */
        mtx_lock(&sc->aac_io_lock);
        error = aacraid_wait_command(cm);
        mtx_unlock(&sc->aac_io_lock);
        if (error != 0) {
                device_printf(sc->aac_dev,
                              "aacraid_wait_command return %d\n", error);
                goto out;
        }

        /*
         * Copy the FIB and data back out to the caller.
         */
        size = cm->cm_fib->Header.Size;
        if (size > sc->aac_max_fib_size) {
                device_printf(sc->aac_dev, "outbound FIB oversized (%d > %d)\n",
                              size, sc->aac_max_fib_size);
                size = sc->aac_max_fib_size;
        }
        error = copyout(cm->cm_fib, ufib, size);

out:
        if (cm != NULL) {
                mtx_lock(&sc->aac_io_lock);
                aacraid_release_command(cm);
                mtx_unlock(&sc->aac_io_lock);
        }
        return(error);
}

/*
 * Send a passthrough FIB supplied from userspace
 */
static int
aac_ioctl_send_raw_srb(struct aac_softc *sc, caddr_t arg)
{
        struct aac_command *cm;
        struct aac_fib *fib;
        struct aac_srb *srbcmd;
        struct aac_srb *user_srb = (struct aac_srb *)arg;
        void *user_reply;
        int error, transfer_data = 0;
        bus_dmamap_t orig_map = 0;
        u_int32_t fibsize = 0;
        u_int64_t srb_sg_address;
        u_int32_t srb_sg_bytecount;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        cm = NULL;

        mtx_lock(&sc->aac_io_lock);
        if (aacraid_alloc_command(sc, &cm)) {
                struct aac_event *event;

                event = malloc(sizeof(struct aac_event), M_AACRAIDBUF,
                    M_NOWAIT | M_ZERO);
                if (event == NULL) {
                        error = EBUSY;
                        mtx_unlock(&sc->aac_io_lock);
                        goto out;
                }
                event->ev_type = AAC_EVENT_CMFREE;
                event->ev_callback = aac_ioctl_event;
                event->ev_arg = &cm;
                aacraid_add_event(sc, event);
                msleep(cm, &sc->aac_io_lock, 0, "aacraid_ctlsraw", 0);
        }
        mtx_unlock(&sc->aac_io_lock);

        cm->cm_data = NULL;
        /* save original dma map */
        orig_map = cm->cm_datamap;

        fib = cm->cm_fib;
        srbcmd = (struct aac_srb *)fib->data;
        if ((error = copyin((void *)&user_srb->data_len, &fibsize,
            sizeof (u_int32_t))) != 0)
                goto out;
        if (fibsize > (sc->aac_max_fib_size-sizeof(struct aac_fib_header))) {
                error = EINVAL;
                goto out;
        }
        if ((error = copyin((void *)user_srb, srbcmd, fibsize)) != 0)
                goto out;

        srbcmd->function = 0;           /* SRBF_ExecuteScsi */
        srbcmd->retry_limit = 0;        /* obsolete */

        /* only one sg element from userspace supported */
        if (srbcmd->sg_map.SgCount > 1) {
                error = EINVAL;
                goto out;
        }
        /* check fibsize */
        if (fibsize == (sizeof(struct aac_srb) + 
                srbcmd->sg_map.SgCount * sizeof(struct aac_sg_entry))) {
                struct aac_sg_entry *sgp = srbcmd->sg_map.SgEntry;
                struct aac_sg_entry sg;

                if ((error = copyin(sgp, &sg, sizeof(sg))) != 0)
                        goto out;

                srb_sg_bytecount = sg.SgByteCount;
                srb_sg_address = (u_int64_t)sg.SgAddress;
        } else if (fibsize == (sizeof(struct aac_srb) + 
                srbcmd->sg_map.SgCount * sizeof(struct aac_sg_entry64))) {
#ifdef __LP64__
                struct aac_sg_entry64 *sgp = 
                        (struct aac_sg_entry64 *)srbcmd->sg_map.SgEntry;
                struct aac_sg_entry64 sg;

                if ((error = copyin(sgp, &sg, sizeof(sg))) != 0)
                        goto out;

                srb_sg_bytecount = sg.SgByteCount;
                srb_sg_address = sg.SgAddress;
#else
                error = EINVAL;
                goto out;
#endif
        } else {
                error = EINVAL;
                goto out;
        }
        user_reply = (char *)arg + fibsize;
        srbcmd->data_len = srb_sg_bytecount;
        if (srbcmd->sg_map.SgCount == 1) 
                transfer_data = 1;

        if (transfer_data) {
                /*
                 * Create DMA tag for the passthr. data buffer and allocate it.
                 */
                if (bus_dma_tag_create(sc->aac_parent_dmat,     /* parent */
                        1, 0,                   /* algnmnt, boundary */
                        (sc->flags & AAC_FLAGS_SG_64BIT) ?
                        BUS_SPACE_MAXADDR_32BIT :
                        0x7fffffff,             /* lowaddr */
                        BUS_SPACE_MAXADDR,      /* highaddr */
                        NULL, NULL,             /* filter, filterarg */
                        srb_sg_bytecount,       /* size */
                        sc->aac_sg_tablesize,   /* nsegments */
                        srb_sg_bytecount,       /* maxsegsize */
                        0,                      /* flags */
                        NULL, NULL,             /* No locking needed */
                        &cm->cm_passthr_dmat)) {
                        error = ENOMEM;
                        goto out;
                }
                if (bus_dmamem_alloc(cm->cm_passthr_dmat, (void **)&cm->cm_data,
                        BUS_DMA_NOWAIT, &cm->cm_datamap)) {
                        error = ENOMEM;
                        goto out;
                }
                /* fill some cm variables */
                cm->cm_datalen = srb_sg_bytecount;
                if (srbcmd->flags & AAC_SRB_FLAGS_DATA_IN) 
                        cm->cm_flags |= AAC_CMD_DATAIN;
                if (srbcmd->flags & AAC_SRB_FLAGS_DATA_OUT)
                        cm->cm_flags |= AAC_CMD_DATAOUT;

                if (srbcmd->flags & AAC_SRB_FLAGS_DATA_OUT) {
                        if ((error = copyin((void *)(uintptr_t)srb_sg_address,
                                cm->cm_data, cm->cm_datalen)) != 0)
                                goto out;
                        /* sync required for bus_dmamem_alloc() alloc. mem.? */
                        bus_dmamap_sync(cm->cm_passthr_dmat, cm->cm_datamap,
                                BUS_DMASYNC_PREWRITE);
                }
        }

        /* build the FIB */
        fib->Header.Size = sizeof(struct aac_fib_header) + 
                sizeof(struct aac_srb);
        fib->Header.XferState =
                AAC_FIBSTATE_HOSTOWNED   |
                AAC_FIBSTATE_INITIALISED |
                AAC_FIBSTATE_EMPTY       |
                AAC_FIBSTATE_FROMHOST    |
                AAC_FIBSTATE_REXPECTED   |
                AAC_FIBSTATE_NORM        |
                AAC_FIBSTATE_ASYNC;

        fib->Header.Command = (sc->flags & AAC_FLAGS_SG_64BIT) ? 
                ScsiPortCommandU64 : ScsiPortCommand;
        cm->cm_sgtable = (struct aac_sg_table *)&srbcmd->sg_map;

        aac_srb_tole(srbcmd);

        /* send command */
        if (transfer_data) {
                bus_dmamap_load(cm->cm_passthr_dmat,
                        cm->cm_datamap, cm->cm_data,
                        cm->cm_datalen,
                        aacraid_map_command_sg, cm, 0);
        } else {
                aacraid_map_command_sg(cm, NULL, 0, 0);
        }

        /* wait for completion */
        mtx_lock(&sc->aac_io_lock);
        while (!(cm->cm_flags & AAC_CMD_COMPLETED))
                msleep(cm, &sc->aac_io_lock, 0, "aacraid_ctlsrw2", 0);
        mtx_unlock(&sc->aac_io_lock);

        /* copy data */
        if (transfer_data && (le32toh(srbcmd->flags) & AAC_SRB_FLAGS_DATA_IN)) {
                if ((error = copyout(cm->cm_data,
                        (void *)(uintptr_t)srb_sg_address,
                        cm->cm_datalen)) != 0)
                        goto out;
                /* sync required for bus_dmamem_alloc() allocated mem.? */
                bus_dmamap_sync(cm->cm_passthr_dmat, cm->cm_datamap,
                                BUS_DMASYNC_POSTREAD);
        }

        /* status */
        aac_srb_response_toh((struct aac_srb_response *)fib->data);
        error = copyout(fib->data, user_reply, sizeof(struct aac_srb_response));

out:
        if (cm && cm->cm_data) {
                if (transfer_data)
                        bus_dmamap_unload(cm->cm_passthr_dmat, cm->cm_datamap);
                bus_dmamem_free(cm->cm_passthr_dmat, cm->cm_data, cm->cm_datamap);
                cm->cm_datamap = orig_map;
        }
        if (cm && cm->cm_passthr_dmat) 
                bus_dma_tag_destroy(cm->cm_passthr_dmat);
        if (cm) { 
                mtx_lock(&sc->aac_io_lock);
                aacraid_release_command(cm);
                mtx_unlock(&sc->aac_io_lock);
        }
        return(error);
}

/*
 * Request an AIF from the controller (new comm. type1)
 */
static void
aac_request_aif(struct aac_softc *sc)
{
        struct aac_command *cm;
        struct aac_fib *fib;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        if (aacraid_alloc_command(sc, &cm)) {
                sc->aif_pending = 1;
                return;
        }
        sc->aif_pending = 0;
    
        /* build the FIB */
        fib = cm->cm_fib;
        fib->Header.Size = sizeof(struct aac_fib);
        fib->Header.XferState =
        AAC_FIBSTATE_HOSTOWNED   |
        AAC_FIBSTATE_INITIALISED |
        AAC_FIBSTATE_EMPTY       |
        AAC_FIBSTATE_FROMHOST    |
        AAC_FIBSTATE_REXPECTED   |
        AAC_FIBSTATE_NORM        |
        AAC_FIBSTATE_ASYNC;
        /* set AIF marker */
        fib->Header.Handle = 0x00800000;
        fib->Header.Command = AifRequest;
        ((struct aac_aif_command *)fib->data)->command = htole32(AifReqEvent);

        aacraid_map_command_sg(cm, NULL, 0, 0);
}

/*
 * cdevpriv interface private destructor.
 */
static void
aac_cdevpriv_dtor(void *arg)
{
        struct aac_softc *sc;

        sc = arg;
        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
        device_unbusy(sc->aac_dev);
}

/*
 * Handle an AIF sent to us by the controller; queue it for later reference.
 * If the queue fills up, then drop the older entries.
 */
static void
aac_handle_aif(struct aac_softc *sc, struct aac_fib *fib)
{
        struct aac_aif_command *aif;
        struct aac_container *co, *co_next;
        struct aac_fib_context *ctx;
        struct aac_fib *sync_fib;
        struct aac_mntinforesp mir;
        int next, current, found;
        int count = 0, changed = 0, i = 0;
        u_int32_t channel, uid;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        aif = (struct aac_aif_command*)&fib->data[0];
        aacraid_print_aif(sc, aif);

        /* Is it an event that we should care about? */
        switch (le32toh(aif->command)) {
        case AifCmdEventNotify:
                switch (le32toh(aif->data.EN.type)) {
                case AifEnAddContainer:
                case AifEnDeleteContainer:
                        /*
                         * A container was added or deleted, but the message
                         * doesn't tell us anything else!  Re-enumerate the
                         * containers and sort things out.
                         */
                        aac_alloc_sync_fib(sc, &sync_fib);
                        do {
                                /*
                                 * Ask the controller for its containers one at
                                 * a time.
                                 * XXX What if the controller's list changes
                                 * midway through this enumaration?
                                 * XXX This should be done async.
                                 */
                                if (aac_get_container_info(sc, sync_fib, i, 
                                        &mir, &uid) != 0)
                                        continue;
                                if (i == 0)
                                        count = mir.MntRespCount;
                                /*
                                 * Check the container against our list.
                                 * co->co_found was already set to 0 in a
                                 * previous run.
                                 */
                                if ((mir.Status == ST_OK) &&
                                    (mir.MntTable[0].VolType != CT_NONE)) {
                                        found = 0;
                                        TAILQ_FOREACH(co,
                                                      &sc->aac_container_tqh,
                                                      co_link) {
                                                if (co->co_mntobj.ObjectId ==
                                                    mir.MntTable[0].ObjectId) {
                                                        co->co_found = 1;
                                                        found = 1;
                                                        break;
                                                }
                                        }
                                        /*
                                         * If the container matched, continue
                                         * in the list.
                                         */
                                        if (found) {
                                                i++;
                                                continue;
                                        }

                                        /*
                                         * This is a new container.  Do all the
                                         * appropriate things to set it up.
                                         */
                                        aac_add_container(sc, &mir, 1, uid);
                                        changed = 1;
                                }
                                i++;
                        } while ((i < count) && (i < AAC_MAX_CONTAINERS));
                        aac_release_sync_fib(sc);

                        /*
                         * Go through our list of containers and see which ones
                         * were not marked 'found'.  Since the controller didn't
                         * list them they must have been deleted.  Do the
                         * appropriate steps to destroy the device.  Also reset
                         * the co->co_found field.
                         */
                        co = TAILQ_FIRST(&sc->aac_container_tqh);
                        while (co != NULL) {
                                if (co->co_found == 0) {
                                        co_next = TAILQ_NEXT(co, co_link);
                                        TAILQ_REMOVE(&sc->aac_container_tqh, co,
                                                     co_link);
                                        free(co, M_AACRAIDBUF);
                                        changed = 1;
                                        co = co_next;
                                } else {
                                        co->co_found = 0;
                                        co = TAILQ_NEXT(co, co_link);
                                }
                        }

                        /* Attach the newly created containers */
                        if (changed) {
                                if (sc->cam_rescan_cb != NULL) 
                                        sc->cam_rescan_cb(sc, 0,
                                        AAC_CAM_TARGET_WILDCARD);
                        }

                        break;

                case AifEnEnclosureManagement:
                        switch (le32toh(aif->data.EN.data.EEE.eventType)) {
                        case AIF_EM_DRIVE_INSERTION:
                        case AIF_EM_DRIVE_REMOVAL:
                                channel = le32toh(aif->data.EN.data.EEE.unitID);
                                if (sc->cam_rescan_cb != NULL)
                                        sc->cam_rescan_cb(sc,
                                            ((channel>>24) & 0xF) + 1,
                                            (channel & 0xFFFF));
                                break;
                        }
                        break;

                case AifEnAddJBOD:
                case AifEnDeleteJBOD:
                case AifRawDeviceRemove:
                        channel = le32toh(aif->data.EN.data.ECE.container);
                        if (sc->cam_rescan_cb != NULL)
                                sc->cam_rescan_cb(sc, ((channel>>24) & 0xF) + 1,
                                    AAC_CAM_TARGET_WILDCARD);
                        break;

                default:
                        break;
                }

        default:
                break;
        }

        /* Copy the AIF data to the AIF queue for ioctl retrieval */
        current = sc->aifq_idx;
        next = (current + 1) % AAC_AIFQ_LENGTH;
        if (next == 0)
                sc->aifq_filled = 1;
        bcopy(fib, &sc->aac_aifq[current], sizeof(struct aac_fib));
        /* Make aifq's FIB header and data LE */
        aac_fib_header_tole(&sc->aac_aifq[current].Header);
        /* modify AIF contexts */
        if (sc->aifq_filled) {
                for (ctx = sc->fibctx; ctx; ctx = ctx->next) {
                        if (next == ctx->ctx_idx)
                                ctx->ctx_wrap = 1;
                        else if (current == ctx->ctx_idx && ctx->ctx_wrap)
                                ctx->ctx_idx = next;
                }       
        }
        sc->aifq_idx = next;
        /* On the off chance that someone is sleeping for an aif... */
        if (sc->aac_state & AAC_STATE_AIF_SLEEPER)
                wakeup(sc->aac_aifq);
        /* Wakeup any poll()ers */
        selwakeuppri(&sc->rcv_select, PRIBIO);

        return;
}

/*
 * Return the Revision of the driver to userspace and check to see if the
 * userspace app is possibly compatible.  This is extremely bogus since
 * our driver doesn't follow Adaptec's versioning system.  Cheat by just
 * returning what the card reported.
 */
static int
aac_rev_check(struct aac_softc *sc, caddr_t udata)
{
        struct aac_rev_check rev_check;
        struct aac_rev_check_resp rev_check_resp;
        int error = 0;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        /*
         * Copyin the revision struct from userspace
         */
        if ((error = copyin(udata, (caddr_t)&rev_check,
                        sizeof(struct aac_rev_check))) != 0) {
                return error;
        }

        fwprintf(sc, HBA_FLAGS_DBG_IOCTL_COMMANDS_B, "Userland revision= %d\n",
              rev_check.callingRevision.buildNumber);

        /*
         * Doctor up the response struct.
         */
        rev_check_resp.possiblyCompatible = 1;
        rev_check_resp.adapterSWRevision.external.comp.major =
            AAC_DRIVER_MAJOR_VERSION;
        rev_check_resp.adapterSWRevision.external.comp.minor =
            AAC_DRIVER_MINOR_VERSION;
        rev_check_resp.adapterSWRevision.external.comp.type =
            AAC_DRIVER_TYPE;
        rev_check_resp.adapterSWRevision.external.comp.dash =
            AAC_DRIVER_BUGFIX_LEVEL;
        rev_check_resp.adapterSWRevision.buildNumber =
            AAC_DRIVER_BUILD;

        return(copyout((caddr_t)&rev_check_resp, udata,
                        sizeof(struct aac_rev_check_resp)));
}

/*
 * Pass the fib context to the caller
 */
static int
aac_open_aif(struct aac_softc *sc, caddr_t arg)
{
        struct aac_fib_context *fibctx, *ctx;
        int error = 0;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        fibctx = malloc(sizeof(struct aac_fib_context), M_AACRAIDBUF, M_NOWAIT|M_ZERO);
        if (fibctx == NULL)
                return (ENOMEM);

        mtx_lock(&sc->aac_io_lock);
        /* all elements are already 0, add to queue */
        if (sc->fibctx == NULL)
                sc->fibctx = fibctx;
        else {
                for (ctx = sc->fibctx; ctx->next; ctx = ctx->next)
                        ;
                ctx->next = fibctx;
                fibctx->prev = ctx;
        }

        /* evaluate unique value */
        fibctx->unique = (*(u_int32_t *)&fibctx & 0xffffffff);
        ctx = sc->fibctx;
        while (ctx != fibctx) {
                if (ctx->unique == fibctx->unique) {
                        fibctx->unique++;
                        ctx = sc->fibctx;
                } else {
                        ctx = ctx->next;
                }
        }

        error = copyout(&fibctx->unique, (void *)arg, sizeof(u_int32_t));
        mtx_unlock(&sc->aac_io_lock);
        if (error)
                aac_close_aif(sc, (caddr_t)ctx);
        return error;
}

/*
 * Close the caller's fib context
 */
static int
aac_close_aif(struct aac_softc *sc, caddr_t arg)
{
        struct aac_fib_context *ctx;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        mtx_lock(&sc->aac_io_lock);
        for (ctx = sc->fibctx; ctx; ctx = ctx->next) {
                if (ctx->unique == *(uint32_t *)&arg) {
                        if (ctx == sc->fibctx)
                                sc->fibctx = NULL;
                        else {
                                ctx->prev->next = ctx->next;
                                if (ctx->next)
                                        ctx->next->prev = ctx->prev;
                        }
                        break;
                }
        }
        if (ctx)
                free(ctx, M_AACRAIDBUF);

        mtx_unlock(&sc->aac_io_lock);
        return 0;
}

/*
 * Pass the caller the next AIF in their queue
 */
static int
aac_getnext_aif(struct aac_softc *sc, caddr_t arg)
{
        struct get_adapter_fib_ioctl agf;
        struct aac_fib_context *ctx;
        int error;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        mtx_lock(&sc->aac_io_lock);
#ifdef COMPAT_FREEBSD32
        if (SV_CURPROC_FLAG(SV_ILP32)) {
                struct get_adapter_fib_ioctl32 agf32;
                error = copyin(arg, &agf32, sizeof(agf32));
                if (error == 0) {
                        agf.AdapterFibContext = agf32.AdapterFibContext;
                        agf.Wait = agf32.Wait;
                        agf.AifFib = (caddr_t)(uintptr_t)agf32.AifFib;
                }
        } else
#endif
                error = copyin(arg, &agf, sizeof(agf));
        if (error == 0) {
                for (ctx = sc->fibctx; ctx; ctx = ctx->next) {
                        if (agf.AdapterFibContext == ctx->unique)
                                break;
                }
                if (!ctx) {
                        mtx_unlock(&sc->aac_io_lock);
                        return (EFAULT);
                }

                error = aac_return_aif(sc, ctx, agf.AifFib);
                if (error == EAGAIN && agf.Wait) {
                        fwprintf(sc, HBA_FLAGS_DBG_AIF_B, "aac_getnext_aif(): waiting for AIF");
                        sc->aac_state |= AAC_STATE_AIF_SLEEPER;
                        while (error == EAGAIN) {
                                mtx_unlock(&sc->aac_io_lock);
                                error = tsleep(sc->aac_aifq, PRIBIO |
                                               PCATCH, "aacaif", 0);
                                mtx_lock(&sc->aac_io_lock);
                                if (error == 0)
                                        error = aac_return_aif(sc, ctx, agf.AifFib);
                        }
                        sc->aac_state &= ~AAC_STATE_AIF_SLEEPER;
                }
        }
        mtx_unlock(&sc->aac_io_lock);
        return(error);
}

/*
 * Hand the next AIF off the top of the queue out to userspace.
 */
static int
aac_return_aif(struct aac_softc *sc, struct aac_fib_context *ctx, caddr_t uptr)
{
        int current, error;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        current = ctx->ctx_idx;
        if (current == sc->aifq_idx && !ctx->ctx_wrap) {
                /* empty */
                return (EAGAIN);
        }
        error =
                copyout(&sc->aac_aifq[current], (void *)uptr, sizeof(struct aac_fib));
        if (error)
                device_printf(sc->aac_dev,
                    "aac_return_aif: copyout returned %d\n", error);
        else {
                ctx->ctx_wrap = 0;
                ctx->ctx_idx = (current + 1) % AAC_AIFQ_LENGTH;
        }
        return(error);
}

static int
aac_get_pci_info(struct aac_softc *sc, caddr_t uptr)
{
        struct aac_pci_info {
                u_int32_t bus;
                u_int32_t slot;
        } pciinf;
        int error;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        pciinf.bus = pci_get_bus(sc->aac_dev);
        pciinf.slot = pci_get_slot(sc->aac_dev);

        error = copyout((caddr_t)&pciinf, uptr,
                        sizeof(struct aac_pci_info));

        return (error);
}

static int
aac_supported_features(struct aac_softc *sc, caddr_t uptr)
{
        struct aac_features f;
        int error;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        if ((error = copyin(uptr, &f, sizeof (f))) != 0)
                return (error);

        /*
         * When the management driver receives FSACTL_GET_FEATURES ioctl with
         * ALL zero in the featuresState, the driver will return the current
         * state of all the supported features, the data field will not be
         * valid.
         * When the management driver receives FSACTL_GET_FEATURES ioctl with
         * a specific bit set in the featuresState, the driver will return the
         * current state of this specific feature and whatever data that are
         * associated with the feature in the data field or perform whatever
         * action needed indicates in the data field.
         */
         if (f.feat.fValue == 0) {
                f.feat.fBits.largeLBA =
                    (sc->flags & AAC_FLAGS_LBA_64BIT) ? 1 : 0;
                f.feat.fBits.JBODSupport = 1;
                /* TODO: In the future, add other features state here as well */
        } else {
                if (f.feat.fBits.largeLBA)
                        f.feat.fBits.largeLBA =
                            (sc->flags & AAC_FLAGS_LBA_64BIT) ? 1 : 0;
                /* TODO: Add other features state and data in the future */
        }

        error = copyout(&f, uptr, sizeof (f));
        return (error);
}

/*
 * Give the userland some information about the container.  The AAC arch
 * expects the driver to be a SCSI passthrough type driver, so it expects
 * the containers to have b:t:l numbers.  Fake it.
 */
static int
aac_query_disk(struct aac_softc *sc, caddr_t uptr)
{
        struct aac_query_disk query_disk;
        struct aac_container *co;
        int error, id;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

        mtx_lock(&sc->aac_io_lock);
        error = copyin(uptr, (caddr_t)&query_disk,
                       sizeof(struct aac_query_disk));
        if (error) {
                mtx_unlock(&sc->aac_io_lock);
                return (error);
        }

        id = query_disk.ContainerNumber;
        if (id == -1) {
                mtx_unlock(&sc->aac_io_lock);
                return (EINVAL);
        }

        TAILQ_FOREACH(co, &sc->aac_container_tqh, co_link) {
                if (co->co_mntobj.ObjectId == id)
                        break;
                }

        if (co == NULL) {
                        query_disk.Valid = 0;
                        query_disk.Locked = 0;
                        query_disk.Deleted = 1;         /* XXX is this right? */
        } else {
                query_disk.Valid = 1;
                query_disk.Locked = 1;
                query_disk.Deleted = 0;
                query_disk.Bus = device_get_unit(sc->aac_dev);
                query_disk.Target = 0;
                query_disk.Lun = 0;
                query_disk.UnMapped = 0;
        }

        error = copyout((caddr_t)&query_disk, uptr,
                        sizeof(struct aac_query_disk));

        mtx_unlock(&sc->aac_io_lock);
        return (error);
}

static void
aac_container_bus(struct aac_softc *sc)
{
        struct aac_sim *sim;
        device_t child;

        sim =(struct aac_sim *)malloc(sizeof(struct aac_sim),
                M_AACRAIDBUF, M_NOWAIT | M_ZERO);
        if (sim == NULL) {
                device_printf(sc->aac_dev,
                "No memory to add container bus\n");
                panic("Out of memory?!");
        }
        child = device_add_child(sc->aac_dev, "aacraidp", DEVICE_UNIT_ANY);
        if (child == NULL) {
                device_printf(sc->aac_dev,
                "device_add_child failed for container bus\n");
                free(sim, M_AACRAIDBUF);
                panic("Out of memory?!");
        }

        sim->TargetsPerBus = AAC_MAX_CONTAINERS;
        sim->BusNumber = 0;
        sim->BusType = CONTAINER_BUS;
        sim->InitiatorBusId = -1;
        sim->aac_sc = sc;
        sim->sim_dev = child;
        sim->aac_cam = NULL;

        device_set_ivars(child, sim);
        device_set_desc(child, "Container Bus");
        TAILQ_INSERT_TAIL(&sc->aac_sim_tqh, sim, sim_link);
        /*
        device_set_desc(child, aac_describe_code(aac_container_types,
                        mir->MntTable[0].VolType));
        */
        bus_attach_children(sc->aac_dev);
}

static void
aac_get_bus_info(struct aac_softc *sc)
{
        struct aac_fib *fib;
        struct aac_ctcfg *c_cmd;
        struct aac_ctcfg_resp *c_resp;
        struct aac_vmioctl *vmi;
        struct aac_vmi_businf_resp *vmi_resp;
        struct aac_getbusinf businfo;
        struct aac_sim *caminf;
        device_t child;
        int i, error;

        mtx_lock(&sc->aac_io_lock);
        aac_alloc_sync_fib(sc, &fib);
        c_cmd = (struct aac_ctcfg *)&fib->data[0];
        bzero(c_cmd, sizeof(struct aac_ctcfg));

        c_cmd->Command = VM_ContainerConfig;
        c_cmd->cmd = CT_GET_SCSI_METHOD;
        c_cmd->param = 0;

        aac_ctcfg_tole(c_cmd);
        error = aac_sync_fib(sc, ContainerCommand, 0, fib,
            sizeof(struct aac_ctcfg));
        if (error) {
                device_printf(sc->aac_dev, "Error %d sending "
                    "VM_ContainerConfig command\n", error);
                aac_release_sync_fib(sc);
                mtx_unlock(&sc->aac_io_lock);
                return;
        }

        c_resp = (struct aac_ctcfg_resp *)&fib->data[0];
        aac_ctcfg_resp_toh(c_resp);
        if (c_resp->Status != ST_OK) {
                device_printf(sc->aac_dev, "VM_ContainerConfig returned 0x%x\n",
                    c_resp->Status);
                aac_release_sync_fib(sc);
                mtx_unlock(&sc->aac_io_lock);
                return;
        }

        sc->scsi_method_id = c_resp->param;

        vmi = (struct aac_vmioctl *)&fib->data[0];
        bzero(vmi, sizeof(struct aac_vmioctl));

        vmi->Command = VM_Ioctl;
        vmi->ObjType = FT_DRIVE;
        vmi->MethId = sc->scsi_method_id;
        vmi->ObjId = 0;
        vmi->IoctlCmd = GetBusInfo;

        aac_vmioctl_tole(vmi);
        error = aac_sync_fib(sc, ContainerCommand, 0, fib,
            sizeof(struct aac_vmi_businf_resp));
        if (error) {
                device_printf(sc->aac_dev, "Error %d sending VMIoctl command\n",
                    error);
                aac_release_sync_fib(sc);
                mtx_unlock(&sc->aac_io_lock);
                return;
        }

        vmi_resp = (struct aac_vmi_businf_resp *)&fib->data[0];
        aac_vmi_businf_resp_toh(vmi_resp);
        if (vmi_resp->Status != ST_OK) {
                device_printf(sc->aac_dev, "VM_Ioctl returned %d\n",
                    vmi_resp->Status);
                aac_release_sync_fib(sc);
                mtx_unlock(&sc->aac_io_lock);
                return;
        }

        bcopy(&vmi_resp->BusInf, &businfo, sizeof(struct aac_getbusinf));
        aac_release_sync_fib(sc);
        mtx_unlock(&sc->aac_io_lock);

        for (i = 0; i < businfo.BusCount; i++) {
                if (businfo.BusValid[i] != AAC_BUS_VALID)
                        continue;

                caminf = (struct aac_sim *)malloc( sizeof(struct aac_sim),
                    M_AACRAIDBUF, M_NOWAIT | M_ZERO);
                if (caminf == NULL) {
                        device_printf(sc->aac_dev,
                            "No memory to add passthrough bus %d\n", i);
                        break;
                }

                child = device_add_child(sc->aac_dev, "aacraidp", DEVICE_UNIT_ANY);
                if (child == NULL) {
                        device_printf(sc->aac_dev,
                            "device_add_child failed for passthrough bus %d\n",
                            i);
                        free(caminf, M_AACRAIDBUF);
                        break;
                }

                caminf->TargetsPerBus = businfo.TargetsPerBus;
                caminf->BusNumber = i+1;
                caminf->BusType = PASSTHROUGH_BUS;
                caminf->InitiatorBusId = -1;
                caminf->aac_sc = sc;
                caminf->sim_dev = child;
                caminf->aac_cam = NULL;

                device_set_ivars(child, caminf);
                device_set_desc(child, "SCSI Passthrough Bus");
                TAILQ_INSERT_TAIL(&sc->aac_sim_tqh, caminf, sim_link);
        }
}

/*
 * Check to see if the kernel is up and running. If we are in a
 * BlinkLED state, return the BlinkLED code.
 */
static u_int32_t
aac_check_adapter_health(struct aac_softc *sc, u_int8_t *bled)
{
        u_int32_t ret;

        ret = AAC_GET_FWSTATUS(sc);

        if (ret & AAC_UP_AND_RUNNING)
                ret = 0;
        else if (ret & AAC_KERNEL_PANIC && bled)
                *bled = (ret >> 16) & 0xff;

        return (ret);
}

/*
 * Once do an IOP reset, basically have to re-initialize the card as
 * if coming up from a cold boot, and the driver is responsible for
 * any IO that was outstanding to the adapter at the time of the IOP
 * RESET. And prepare the driver for IOP RESET by making the init code
 * modular with the ability to call it from multiple places.
 */
static int
aac_reset_adapter(struct aac_softc *sc)
{
        struct aac_command *cm;
        struct aac_fib *fib;
        struct aac_pause_command *pc;
        u_int32_t status, reset_mask, waitCount, max_msix_orig;
        int ret, msi_enabled_orig;

        fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
        mtx_assert(&sc->aac_io_lock, MA_OWNED);

        if (sc->aac_state & AAC_STATE_RESET) {
                device_printf(sc->aac_dev, "aac_reset_adapter() already in progress\n");
                return (EINVAL);
        }
        sc->aac_state |= AAC_STATE_RESET;

        /* disable interrupt */
        AAC_ACCESS_DEVREG(sc, AAC_DISABLE_INTERRUPT);

        /*
         * Abort all pending commands:
         * a) on the controller
         */
        while ((cm = aac_dequeue_busy(sc)) != NULL) {
                cm->cm_flags |= AAC_CMD_RESET;

                /* is there a completion handler? */
                if (cm->cm_complete != NULL) {
                        cm->cm_complete(cm);
                } else {
                        /* assume that someone is sleeping on this
                         * command
                         */
                        wakeup(cm);
                }
        }

        /* b) in the waiting queues */
        while ((cm = aac_dequeue_ready(sc)) != NULL) {
                cm->cm_flags |= AAC_CMD_RESET;

                /* is there a completion handler? */
                if (cm->cm_complete != NULL) {
                        cm->cm_complete(cm);
                } else {
                        /* assume that someone is sleeping on this
                         * command
                         */
                        wakeup(cm);
                }
        }

        /* flush drives */
        if (aac_check_adapter_health(sc, NULL) == 0) {
                mtx_unlock(&sc->aac_io_lock);
                (void) aacraid_shutdown(sc->aac_dev);
                mtx_lock(&sc->aac_io_lock);
        }

        /* execute IOP reset */
        if (sc->aac_support_opt2 & AAC_SUPPORTED_MU_RESET) {
                AAC_MEM0_SETREG4(sc, AAC_IRCSR, AAC_IRCSR_CORES_RST);

                /* We need to wait for 5 seconds before accessing the MU again
                 * 10000 * 100us = 1000,000us = 1000ms = 1s
                 */
                waitCount = 5 * 10000;
                while (waitCount) {
                        DELAY(100);                     /* delay 100 microseconds */
                        waitCount--;
                }
        } else {
                ret = aacraid_sync_command(sc, AAC_IOP_RESET_ALWAYS,
                        0, 0, 0, 0, &status, &reset_mask);
                if (ret && !sc->doorbell_mask) {
                        /* call IOP_RESET for older firmware */
                        if ((aacraid_sync_command(sc, AAC_IOP_RESET, 0,0,0,0,
                            &status, NULL)) != 0) {
                                if (status == AAC_SRB_STS_INVALID_REQUEST) {
                                        device_printf(sc->aac_dev,
                                            "IOP_RESET not supported\n");
                                } else {
                                        /* probably timeout */
                                        device_printf(sc->aac_dev,
                                            "IOP_RESET failed\n");
                                }

                                /* unwind aac_shutdown() */
                                aac_alloc_sync_fib(sc, &fib);
                                pc = (struct aac_pause_command *)&fib->data[0];
                                pc->Command = VM_ContainerConfig;
                                pc->Type = CT_PAUSE_IO;
                                pc->Timeout = 1;
                                pc->Min = 1;
                                pc->NoRescan = 1;

                                aac_pause_command_tole(pc);
                                (void) aac_sync_fib(sc, ContainerCommand, 0,
                                    fib, sizeof (struct aac_pause_command));
                                aac_release_sync_fib(sc);

                                goto finish;
                        }
                } else if (sc->doorbell_mask) {
                        ret = 0;
                        reset_mask = sc->doorbell_mask;
                }
                if (!ret &&
                    (sc->aac_support_opt2 & AAC_SUPPORTED_DOORBELL_RESET)) {
                        AAC_MEM0_SETREG4(sc, AAC_SRC_IDBR, reset_mask);
                        /*
                         * We need to wait for 5 seconds before accessing the
                         * doorbell again;
                         * 10000 * 100us = 1000,000us = 1000ms = 1s
                         */
                        waitCount = 5 * 10000;
                        while (waitCount) {
                                DELAY(100);     /* delay 100 microseconds */
                                waitCount--;
                        }
                }
        }

        /*
         * Initialize the adapter.
         */
        max_msix_orig = sc->aac_max_msix;
        msi_enabled_orig = sc->msi_enabled;
        sc->msi_enabled = FALSE;
        if (aac_check_firmware(sc) != 0)
                goto finish;
        if (!(sc->flags & AAC_FLAGS_SYNC_MODE)) {
                sc->aac_max_msix = max_msix_orig;
                if (msi_enabled_orig) {
                        sc->msi_enabled = msi_enabled_orig;
                        AAC_ACCESS_DEVREG(sc, AAC_ENABLE_MSIX);
                }
                mtx_unlock(&sc->aac_io_lock);
                aac_init(sc);
                mtx_lock(&sc->aac_io_lock);
        }

finish:
        sc->aac_state &= ~AAC_STATE_RESET;
        AAC_ACCESS_DEVREG(sc, AAC_ENABLE_INTERRUPT);
        aacraid_startio(sc);
        return (0);
}