root/sys/dev/aic7xxx/aic79xx_osm.c 
/*-
 * Bus independent FreeBSD shim for the aic79xx based Adaptec SCSI controllers
 *
 * Copyright (c) 1994-2002, 2004 Justin T. Gibbs.
 * Copyright (c) 2001-2002 Adaptec 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,
 *    without modification.
 * 2. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU Public License ("GPL").
 *
 * 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.
 *
 * $Id: //depot/aic7xxx/freebsd/dev/aic7xxx/aic79xx_osm.c#35 $
 */

#include <dev/aic7xxx/aic79xx_osm.h>
#include <dev/aic7xxx/aic79xx_inline.h>

#include <sys/kthread.h>

#include "opt_ddb.h"
#ifdef DDB
#include <ddb/ddb.h>
#endif

#ifndef AHD_TMODE_ENABLE
#define AHD_TMODE_ENABLE 0
#endif

#include <dev/aic7xxx/aic_osm_lib.c>

#define ccb_scb_ptr spriv_ptr0

#if 0
static void     ahd_dump_targcmd(struct target_cmd *cmd);
#endif
static int      ahd_modevent(module_t mod, int type, void *data);
static void     ahd_action(struct cam_sim *sim, union ccb *ccb);
static void     ahd_set_tran_settings(struct ahd_softc *ahd,
                                      int our_id, char channel,
                                      struct ccb_trans_settings *cts);
static void     ahd_get_tran_settings(struct ahd_softc *ahd,
                                      int our_id, char channel,
                                      struct ccb_trans_settings *cts);
static void     ahd_async(void *callback_arg, uint32_t code,
                          struct cam_path *path, void *arg);
static void     ahd_execute_scb(void *arg, bus_dma_segment_t *dm_segs,
                                int nsegments, int error);
static void     ahd_poll(struct cam_sim *sim);
static void     ahd_setup_data(struct ahd_softc *ahd, struct cam_sim *sim,
                               struct ccb_scsiio *csio, struct scb *scb);
static void     ahd_abort_ccb(struct ahd_softc *ahd, struct cam_sim *sim,
                              union ccb *ccb);
static int      ahd_create_path(struct ahd_softc *ahd,
                                char channel, u_int target, u_int lun,
                                struct cam_path **path);

static const char *ahd_sysctl_node_elements[] = {
        "root",
        "summary",
        "debug"
};

#ifndef NO_SYSCTL_DESCR
static const char *ahd_sysctl_node_descriptions[] = {
        "root error collection for aic79xx controllers",
        "summary collection for aic79xx controllers",
        "debug collection for aic79xx controllers"
};
#endif

static const char *ahd_sysctl_errors_elements[] = {
        "Cerrors",
        "Uerrors",
        "Ferrors"
};

#ifndef NO_SYSCTL_DESCR
static const char *ahd_sysctl_errors_descriptions[] = {
        "Correctable errors",
        "Uncorrectable errors",
        "Fatal errors"
};
#endif

static int
ahd_set_debugcounters(SYSCTL_HANDLER_ARGS)
{
        struct ahd_softc *sc;
        int error, tmpv;

        tmpv = 0;
        sc = arg1;
        error = sysctl_handle_int(oidp, &tmpv, 0, req);
        if (error != 0 || req->newptr == NULL)
                return (error);
        if (tmpv < 0 || tmpv >= AHD_ERRORS_NUMBER)
                return (EINVAL);
        sc->summerr[arg2] = tmpv;
        return (0);
}

static int
ahd_clear_allcounters(SYSCTL_HANDLER_ARGS)
{
        struct ahd_softc *sc;
        int error, tmpv;

        tmpv = 0;
        sc = arg1;
        error = sysctl_handle_int(oidp, &tmpv, 0, req);
        if (error != 0 || req->newptr == NULL)
                return (error);
        if (tmpv != 0)
                bzero(sc->summerr, sizeof(sc->summerr));
        return (0);
}

static int
ahd_create_path(struct ahd_softc *ahd, char channel, u_int target,
                u_int lun, struct cam_path **path)
{
        path_id_t path_id;

        path_id = cam_sim_path(ahd->platform_data->sim);
        return (xpt_create_path(path, /*periph*/NULL,
                                path_id, target, lun));
}

void
ahd_sysctl(struct ahd_softc *ahd)
{
        u_int i;

        for (i = 0; i < AHD_SYSCTL_NUMBER; i++)
                sysctl_ctx_init(&ahd->sysctl_ctx[i]);

        ahd->sysctl_tree[AHD_SYSCTL_ROOT] =
            SYSCTL_ADD_NODE(&ahd->sysctl_ctx[AHD_SYSCTL_ROOT],
                SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
                device_get_nameunit(ahd->dev_softc),
                CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
                ahd_sysctl_node_descriptions[AHD_SYSCTL_ROOT]);
            SYSCTL_ADD_PROC(&ahd->sysctl_ctx[AHD_SYSCTL_ROOT],
                SYSCTL_CHILDREN(ahd->sysctl_tree[AHD_SYSCTL_ROOT]), OID_AUTO,
                "clear", CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_MPSAFE, ahd,
                0, ahd_clear_allcounters, "IU", "Clear all counters");

        for (i = AHD_SYSCTL_SUMMARY; i < AHD_SYSCTL_NUMBER; i++)
                ahd->sysctl_tree[i] =
                    SYSCTL_ADD_NODE(&ahd->sysctl_ctx[i],
                        SYSCTL_CHILDREN(ahd->sysctl_tree[AHD_SYSCTL_ROOT]),
                        OID_AUTO, ahd_sysctl_node_elements[i],
                        CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
                        ahd_sysctl_node_descriptions[i]);

        for (i = AHD_ERRORS_CORRECTABLE; i < AHD_ERRORS_NUMBER; i++) {
                SYSCTL_ADD_UINT(&ahd->sysctl_ctx[AHD_SYSCTL_SUMMARY],
                                SYSCTL_CHILDREN(ahd->sysctl_tree[AHD_SYSCTL_SUMMARY]),
                                OID_AUTO, ahd_sysctl_errors_elements[i],
                                CTLFLAG_RD, &ahd->summerr[i], i,
                                ahd_sysctl_errors_descriptions[i]);
                SYSCTL_ADD_PROC(&ahd->sysctl_ctx[AHD_SYSCTL_DEBUG],
                    SYSCTL_CHILDREN(ahd->sysctl_tree[AHD_SYSCTL_DEBUG]),
                    OID_AUTO, ahd_sysctl_errors_elements[i],
                    CTLFLAG_RW | CTLTYPE_UINT | CTLFLAG_MPSAFE, ahd, i,
                    ahd_set_debugcounters, "IU",
                    ahd_sysctl_errors_descriptions[i]);
        }
}

int
ahd_map_int(struct ahd_softc *ahd)
{
        int error;

        /* Hook up our interrupt handler */
        error = bus_setup_intr(ahd->dev_softc, ahd->platform_data->irq,
                               INTR_TYPE_CAM|INTR_MPSAFE, NULL,
                               ahd_platform_intr, ahd, &ahd->platform_data->ih);
        if (error != 0)
                device_printf(ahd->dev_softc, "bus_setup_intr() failed: %d\n",
                              error);
        return (error);
}

/*
 * Attach all the sub-devices we can find
 */
int
ahd_attach(struct ahd_softc *ahd)
{
        char   ahd_info[256];
        struct ccb_setasync csa;
        struct cam_devq *devq;
        struct cam_sim *sim;
        struct cam_path *path;
        int count;

        count = 0;
        devq = NULL;
        sim = NULL;
        path = NULL;

        /*
         * Create a thread to perform all recovery.
         */
        if (ahd_spawn_recovery_thread(ahd) != 0)
                goto fail;

        ahd_controller_info(ahd, ahd_info);
        printf("%s\n", ahd_info);
        ahd_lock(ahd);

        /*
         * Create the device queue for our SIM(s).
         */
        devq = cam_simq_alloc(AHD_MAX_QUEUE);
        if (devq == NULL)
                goto fail;

        /*
         * Construct our SIM entry
         */
        sim = cam_sim_alloc(ahd_action, ahd_poll, "ahd", ahd,
                            device_get_unit(ahd->dev_softc),
                            &ahd->platform_data->mtx, 1, /*XXX*/256, devq);
        if (sim == NULL) {
                cam_simq_free(devq);
                goto fail;
        }

        if (xpt_bus_register(sim, ahd->dev_softc, /*bus_id*/0) != CAM_SUCCESS) {
                cam_sim_free(sim, /*free_devq*/TRUE);
                sim = NULL;
                goto fail;
        }

        if (xpt_create_path(&path, /*periph*/NULL,
                            cam_sim_path(sim), CAM_TARGET_WILDCARD,
                            CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
                xpt_bus_deregister(cam_sim_path(sim));
                cam_sim_free(sim, /*free_devq*/TRUE);
                sim = NULL;
                goto fail;
        }
                
        memset(&csa, 0, sizeof(csa));
        xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5);
        csa.ccb_h.func_code = XPT_SASYNC_CB;
        csa.event_enable = AC_LOST_DEVICE;
        csa.callback = ahd_async;
        csa.callback_arg = sim;
        xpt_action((union ccb *)&csa);
        count++;

fail:
        ahd->platform_data->sim = sim;
        ahd->platform_data->path = path;
        ahd_unlock(ahd);
        if (count != 0) {
                /* We have to wait until after any system dumps... */
                ahd->platform_data->eh =
                    EVENTHANDLER_REGISTER(shutdown_final, ahd_shutdown,
                                          ahd, SHUTDOWN_PRI_DEFAULT);
                ahd_intr_enable(ahd, TRUE);
        }

        return (count);
}

/*
 * Catch an interrupt from the adapter
 */
void
ahd_platform_intr(void *arg)
{
        struct  ahd_softc *ahd;

        ahd = (struct ahd_softc *)arg; 
        ahd_lock(ahd);
        ahd_intr(ahd);
        ahd_unlock(ahd);
}

static void
ahd_sync_ccb(struct ahd_softc *ahd, struct scb *scb, union ccb *ccb, bool post)
{
        bus_dmasync_op_t op;
        uint32_t rdmask;

        if (ccb->ccb_h.func_code == XPT_CONT_TARGET_IO)
                rdmask = CAM_DIR_OUT;
        else
                rdmask = CAM_DIR_IN;

        if ((ccb->ccb_h.flags & CAM_DIR_MASK) == rdmask)
                op = post ? BUS_DMASYNC_POSTREAD : BUS_DMASYNC_PREREAD;
        else
                op = post ? BUS_DMASYNC_POSTWRITE : BUS_DMASYNC_PREWRITE;

        bus_dmamap_sync(ahd->buffer_dmat, scb->dmamap, op);
}

/*
 * We have an scb which has been processed by the
 * adaptor, now we look to see how the operation
 * went.
 */
void
ahd_done(struct ahd_softc *ahd, struct scb *scb)
{
        union ccb *ccb;

        CAM_DEBUG(scb->io_ctx->ccb_h.path, CAM_DEBUG_TRACE,
                  ("ahd_done - scb %d\n", SCB_GET_TAG(scb)));

        ccb = scb->io_ctx;
        LIST_REMOVE(scb, pending_links);
        if ((scb->flags & SCB_TIMEDOUT) != 0)
                LIST_REMOVE(scb, timedout_links);

        callout_stop(&scb->io_timer);

        if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
                ahd_sync_ccb(ahd, scb, ccb, true);
                bus_dmamap_unload(ahd->buffer_dmat, scb->dmamap);
        }

#ifdef AHD_TARGET_MODE
        if (ccb->ccb_h.func_code == XPT_CONT_TARGET_IO) {
                struct cam_path *ccb_path;

                /*
                 * If we have finally disconnected, clean up our
                 * pending device state.
                 * XXX - There may be error states that cause where
                 *       we will remain connected.
                 */
                ccb_path = ccb->ccb_h.path;
                if (ahd->pending_device != NULL
                 && xpt_path_comp(ahd->pending_device->path, ccb_path) == 0) {
                        if ((ccb->ccb_h.flags & CAM_SEND_STATUS) != 0) {
                                ahd->pending_device = NULL;
                        } else {
                                xpt_print_path(ccb->ccb_h.path);
                                printf("Still disconnected\n");
                                ahd_freeze_ccb(ccb);
                        }
                }

                if (aic_get_transaction_status(scb) == CAM_REQ_INPROG)
                        ccb->ccb_h.status |= CAM_REQ_CMP;
                ccb->ccb_h.status &= ~CAM_SIM_QUEUED;
                ahd_free_scb(ahd, scb);
                xpt_done(ccb);
                return;
        }
#endif

        if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
                struct  scb *list_scb;

                ahd->scb_data.recovery_scbs--;

                if (aic_get_transaction_status(scb) == CAM_BDR_SENT
                 || aic_get_transaction_status(scb) == CAM_REQ_ABORTED)
                        aic_set_transaction_status(scb, CAM_CMD_TIMEOUT);

                if (ahd->scb_data.recovery_scbs == 0) {
                        /*
                         * All recovery actions have completed successfully,
                         * so reinstate the timeouts for all other pending
                         * commands.
                         */
                        LIST_FOREACH(list_scb,
                                     &ahd->pending_scbs, pending_links) {
                                aic_scb_timer_reset(list_scb,
                                                    aic_get_timeout(scb));
                        }

                        ahd_print_path(ahd, scb);
                        printf("no longer in timeout, status = %x\n",
                               ccb->ccb_h.status);
                }
        }

        /* Don't clobber any existing error state */
        if (aic_get_transaction_status(scb) == CAM_REQ_INPROG) {
                ccb->ccb_h.status |= CAM_REQ_CMP;
        } else if ((scb->flags & SCB_SENSE) != 0) {
                /*
                 * We performed autosense retrieval.
                 *
                 * Zero any sense not transferred by the
                 * device.  The SCSI spec mandates that any
                 * untransfered data should be assumed to be
                 * zero.  Complete the 'bounce' of sense information
                 * through buffers accessible via bus-space by
                 * copying it into the clients csio.
                 */
                memset(&ccb->csio.sense_data, 0, sizeof(ccb->csio.sense_data));
                memcpy(&ccb->csio.sense_data,
                       ahd_get_sense_buf(ahd, scb),
/* XXX What size do we want to use??? */
                        sizeof(ccb->csio.sense_data)
                       - ccb->csio.sense_resid);
                scb->io_ctx->ccb_h.status |= CAM_AUTOSNS_VALID;
        } else if ((scb->flags & SCB_PKT_SENSE) != 0) {
                struct scsi_status_iu_header *siu;
                u_int sense_len;

                /*
                 * Copy only the sense data into the provided buffer.
                 */
                siu = (struct scsi_status_iu_header *)scb->sense_data;
                sense_len = MIN(scsi_4btoul(siu->sense_length),
                                sizeof(ccb->csio.sense_data));
                memset(&ccb->csio.sense_data, 0, sizeof(ccb->csio.sense_data));
                memcpy(&ccb->csio.sense_data,
                       ahd_get_sense_buf(ahd, scb) + SIU_SENSE_OFFSET(siu),
                       sense_len);
#ifdef AHD_DEBUG
                if ((ahd_debug & AHD_SHOW_SENSE) != 0) {
                        uint8_t *sense_data = (uint8_t *)&ccb->csio.sense_data;
                        u_int i;

                        printf("Copied %d bytes of sense data offset %d:",
                               sense_len, SIU_SENSE_OFFSET(siu));
                        for (i = 0; i < sense_len; i++)
                                printf(" 0x%x", *sense_data++);
                        printf("\n");
                }
#endif
                scb->io_ctx->ccb_h.status |= CAM_AUTOSNS_VALID;
        }
        ccb->ccb_h.status &= ~CAM_SIM_QUEUED;
        ahd_free_scb(ahd, scb);
        xpt_done(ccb);
}

static void
ahd_action(struct cam_sim *sim, union ccb *ccb)
{
        struct  ahd_softc *ahd;
#ifdef AHD_TARGET_MODE
        struct  ahd_tmode_lstate *lstate;
#endif
        u_int   target_id;
        u_int   our_id;

        CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("ahd_action\n"));

        ahd = (struct ahd_softc *)cam_sim_softc(sim);

        target_id = ccb->ccb_h.target_id;
        our_id = SIM_SCSI_ID(ahd, sim);

        switch (ccb->ccb_h.func_code) {
        /* Common cases first */
#ifdef AHD_TARGET_MODE
        case XPT_ACCEPT_TARGET_IO:      /* Accept Host Target Mode CDB */
        case XPT_CONT_TARGET_IO:/* Continue Host Target I/O Connection*/
        {
                struct     ahd_tmode_tstate *tstate;
                cam_status status;

                status = ahd_find_tmode_devs(ahd, sim, ccb, &tstate,
                                             &lstate, TRUE);

                if (status != CAM_REQ_CMP) {
                        if (ccb->ccb_h.func_code == XPT_CONT_TARGET_IO) {
                                /* Response from the black hole device */
                                tstate = NULL;
                                lstate = ahd->black_hole;
                        } else {
                                ccb->ccb_h.status = status;
                                xpt_done(ccb);
                                break;
                        }
                }
                if (ccb->ccb_h.func_code == XPT_ACCEPT_TARGET_IO) {
                        SLIST_INSERT_HEAD(&lstate->accept_tios, &ccb->ccb_h,
                                          sim_links.sle);
                        ccb->ccb_h.status = CAM_REQ_INPROG;
                        if ((ahd->flags & AHD_TQINFIFO_BLOCKED) != 0)
                                ahd_run_tqinfifo(ahd, /*paused*/FALSE);
                        break;
                }

                /*
                 * The target_id represents the target we attempt to
                 * select.  In target mode, this is the initiator of
                 * the original command.
                 */
                our_id = target_id;
                target_id = ccb->csio.init_id;
                /* FALLTHROUGH */
        }
#endif
        case XPT_SCSI_IO:       /* Execute the requested I/O operation */
        case XPT_RESET_DEV:     /* Bus Device Reset the specified SCSI device */
        {
                struct  scb *scb;
                struct  hardware_scb *hscb;     
                struct  ahd_initiator_tinfo *tinfo;
                struct  ahd_tmode_tstate *tstate;
                u_int   col_idx;

                if ((ahd->flags & AHD_INITIATORROLE) == 0
                 && (ccb->ccb_h.func_code == XPT_SCSI_IO
                  || ccb->ccb_h.func_code == XPT_RESET_DEV)) {
                        ccb->ccb_h.status = CAM_PROVIDE_FAIL;
                        xpt_done(ccb);
                        return;
                }

                /*
                 * get an scb to use.
                 */
                tinfo = ahd_fetch_transinfo(ahd, 'A', our_id,
                                            target_id, &tstate);
                if ((ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) == 0
                 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0
                 || ccb->ccb_h.func_code == XPT_CONT_TARGET_IO) {
                        col_idx = AHD_NEVER_COL_IDX;
                } else {
                        col_idx = AHD_BUILD_COL_IDX(target_id,
                                                    ccb->ccb_h.target_lun);
                }
                if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
                        xpt_freeze_simq(sim, /*count*/1);
                        ahd->flags |= AHD_RESOURCE_SHORTAGE;
                        ccb->ccb_h.status = CAM_REQUEUE_REQ;
                        xpt_done(ccb);
                        return;
                }
                
                hscb = scb->hscb;
                
                CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE,
                          ("start scb(%p)\n", scb));
                scb->io_ctx = ccb;
                /*
                 * So we can find the SCB when an abort is requested
                 */
                ccb->ccb_h.ccb_scb_ptr = scb;

                /*
                 * Put all the arguments for the xfer in the scb
                 */
                hscb->control = 0;
                hscb->scsiid = BUILD_SCSIID(ahd, sim, target_id, our_id);
                hscb->lun = ccb->ccb_h.target_lun;
                if (ccb->ccb_h.func_code == XPT_RESET_DEV) {
                        hscb->cdb_len = 0;
                        scb->flags |= SCB_DEVICE_RESET;
                        hscb->control |= MK_MESSAGE;
                        hscb->task_management = SIU_TASKMGMT_LUN_RESET;
                        ahd_execute_scb(scb, NULL, 0, 0);
                } else {
#ifdef AHD_TARGET_MODE
                        if (ccb->ccb_h.func_code == XPT_CONT_TARGET_IO) {
                                struct target_data *tdata;

                                tdata = &hscb->shared_data.tdata;
                                if (ahd->pending_device == lstate)
                                        scb->flags |= SCB_TARGET_IMMEDIATE;
                                hscb->control |= TARGET_SCB;
                                tdata->target_phases = 0;
                                if ((ccb->ccb_h.flags & CAM_SEND_STATUS) != 0) {
                                        tdata->target_phases |= SPHASE_PENDING;
                                        tdata->scsi_status =
                                            ccb->csio.scsi_status;
                                }
                                if (ccb->ccb_h.flags & CAM_DIS_DISCONNECT)
                                        tdata->target_phases |= NO_DISCONNECT;

                                tdata->initiator_tag =
                                    ahd_htole16(ccb->csio.tag_id);
                        }
#endif
                        hscb->task_management = 0;
                        if (ccb->ccb_h.flags & CAM_TAG_ACTION_VALID)
                                hscb->control |= ccb->csio.tag_action;
                        
                        ahd_setup_data(ahd, sim, &ccb->csio, scb);
                }
                break;
        }
#ifdef AHD_TARGET_MODE
        case XPT_NOTIFY_ACKNOWLEDGE:
        case XPT_IMMEDIATE_NOTIFY:
        {
                struct     ahd_tmode_tstate *tstate;
                struct     ahd_tmode_lstate *lstate;
                cam_status status;

                status = ahd_find_tmode_devs(ahd, sim, ccb, &tstate,
                                             &lstate, TRUE);

                if (status != CAM_REQ_CMP) {
                        ccb->ccb_h.status = status;
                        xpt_done(ccb);
                        break;
                }
                SLIST_INSERT_HEAD(&lstate->immed_notifies, &ccb->ccb_h,
                                  sim_links.sle);
                ccb->ccb_h.status = CAM_REQ_INPROG;
                ahd_send_lstate_events(ahd, lstate);
                break;
        }
        case XPT_EN_LUN:                /* Enable LUN as a target */
                ahd_handle_en_lun(ahd, sim, ccb);
                xpt_done(ccb);
                break;
#endif
        case XPT_ABORT:                 /* Abort the specified CCB */
        {
                ahd_abort_ccb(ahd, sim, ccb);
                break;
        }
        case XPT_SET_TRAN_SETTINGS:
        {
                ahd_set_tran_settings(ahd, SIM_SCSI_ID(ahd, sim),
                                      SIM_CHANNEL(ahd, sim), &ccb->cts);
                xpt_done(ccb);
                break;
        }
        case XPT_GET_TRAN_SETTINGS:
        /* Get default/user set transfer settings for the target */
        {
                ahd_get_tran_settings(ahd, SIM_SCSI_ID(ahd, sim),
                                      SIM_CHANNEL(ahd, sim), &ccb->cts);
                xpt_done(ccb);
                break;
        }
        case XPT_CALC_GEOMETRY:
        {
                aic_calc_geometry(&ccb->ccg, ahd->flags & AHD_EXTENDED_TRANS_A);
                xpt_done(ccb);
                break;
        }
        case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
        {
                int  found;
                
                found = ahd_reset_channel(ahd, SIM_CHANNEL(ahd, sim),
                                          /*initiate reset*/TRUE);
                if (bootverbose) {
                        xpt_print_path(SIM_PATH(ahd, sim));
                        printf("SCSI bus reset delivered. "
                               "%d SCBs aborted.\n", found);
                }
                ccb->ccb_h.status = CAM_REQ_CMP;
                xpt_done(ccb);
                break;
        }
        case XPT_TERM_IO:               /* Terminate the I/O process */
                /* XXX Implement */
                ccb->ccb_h.status = CAM_REQ_INVALID;
                xpt_done(ccb);
                break;
        case XPT_PATH_INQ:              /* Path routing inquiry */
        {
                struct ccb_pathinq *cpi = &ccb->cpi;
                
                cpi->version_num = 1; /* XXX??? */
                cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE;
                if ((ahd->features & AHD_WIDE) != 0)
                        cpi->hba_inquiry |= PI_WIDE_16;
                if ((ahd->features & AHD_TARGETMODE) != 0) {
                        cpi->target_sprt = PIT_PROCESSOR
                                         | PIT_DISCONNECT
                                         | PIT_TERM_IO;
                } else {
                        cpi->target_sprt = 0;
                }
                cpi->hba_misc = 0;
                cpi->hba_eng_cnt = 0;
                cpi->max_target = (ahd->features & AHD_WIDE) ? 15 : 7;
                cpi->max_lun = AHD_NUM_LUNS_NONPKT - 1;
                cpi->initiator_id = ahd->our_id;
                if ((ahd->flags & AHD_RESET_BUS_A) == 0) {
                        cpi->hba_misc |= PIM_NOBUSRESET;
                }
                cpi->bus_id = cam_sim_bus(sim);
                cpi->base_transfer_speed = 3300;
                strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
                strlcpy(cpi->hba_vid, "Adaptec", HBA_IDLEN);
                strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
                cpi->unit_number = cam_sim_unit(sim);
                cpi->protocol = PROTO_SCSI;
                cpi->protocol_version = SCSI_REV_2;
                cpi->transport = XPORT_SPI;
                cpi->transport_version = 4;
                cpi->xport_specific.spi.ppr_options = SID_SPI_CLOCK_DT_ST
                                                    | SID_SPI_IUS
                                                    | SID_SPI_QAS;
                cpi->ccb_h.status = CAM_REQ_CMP;
                xpt_done(ccb);
                break;
        }
        default:
                ccb->ccb_h.status = CAM_PROVIDE_FAIL;
                xpt_done(ccb);
                break;
        }
}

static void
ahd_set_tran_settings(struct ahd_softc *ahd, int our_id, char channel,
                      struct ccb_trans_settings *cts)
{
        struct    ahd_devinfo devinfo;
        struct    ccb_trans_settings_scsi *scsi;
        struct    ccb_trans_settings_spi *spi;
        struct    ahd_initiator_tinfo *tinfo;
        struct    ahd_tmode_tstate *tstate;
        uint16_t *discenable;
        uint16_t *tagenable;
        u_int     update_type;

        scsi = &cts->proto_specific.scsi;
        spi = &cts->xport_specific.spi;
        ahd_compile_devinfo(&devinfo, SIM_SCSI_ID(ahd, sim),
                            cts->ccb_h.target_id,
                            cts->ccb_h.target_lun,
                            SIM_CHANNEL(ahd, sim),
                            ROLE_UNKNOWN);
        tinfo = ahd_fetch_transinfo(ahd, devinfo.channel,
                                    devinfo.our_scsiid,
                                    devinfo.target, &tstate);
        update_type = 0;
        if (cts->type == CTS_TYPE_CURRENT_SETTINGS) {
                update_type |= AHD_TRANS_GOAL;
                discenable = &tstate->discenable;
                tagenable = &tstate->tagenable;
                tinfo->curr.protocol_version = cts->protocol_version;
                tinfo->curr.transport_version = cts->transport_version;
                tinfo->goal.protocol_version = cts->protocol_version;
                tinfo->goal.transport_version = cts->transport_version;
        } else if (cts->type == CTS_TYPE_USER_SETTINGS) {
                update_type |= AHD_TRANS_USER;
                discenable = &ahd->user_discenable;
                tagenable = &ahd->user_tagenable;
                tinfo->user.protocol_version = cts->protocol_version;
                tinfo->user.transport_version = cts->transport_version;
        } else {
                cts->ccb_h.status = CAM_REQ_INVALID;
                return;
        }

        if ((spi->valid & CTS_SPI_VALID_DISC) != 0) {
                if ((spi->flags & CTS_SPI_FLAGS_DISC_ENB) != 0)
                        *discenable |= devinfo.target_mask;
                else
                        *discenable &= ~devinfo.target_mask;
        }

        if ((scsi->valid & CTS_SCSI_VALID_TQ) != 0) {
                if ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0)
                        *tagenable |= devinfo.target_mask;
                else
                        *tagenable &= ~devinfo.target_mask;
        }       

        if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0) {
                ahd_validate_width(ahd, /*tinfo limit*/NULL,
                                   &spi->bus_width, ROLE_UNKNOWN);
                ahd_set_width(ahd, &devinfo, spi->bus_width,
                              update_type, /*paused*/FALSE);
        }

        if ((spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) {
                if (update_type == AHD_TRANS_USER)
                        spi->ppr_options = tinfo->user.ppr_options;
                else
                        spi->ppr_options = tinfo->goal.ppr_options;
        }

        if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) {
                if (update_type == AHD_TRANS_USER)
                        spi->sync_offset = tinfo->user.offset;
                else
                        spi->sync_offset = tinfo->goal.offset;
        }

        if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) {
                if (update_type == AHD_TRANS_USER)
                        spi->sync_period = tinfo->user.period;
                else
                        spi->sync_period = tinfo->goal.period;
        }

        if (((spi->valid & CTS_SPI_VALID_SYNC_RATE) != 0)
         || ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0)) {
                u_int   maxsync;

                maxsync = AHD_SYNCRATE_MAX;

                if (spi->bus_width != MSG_EXT_WDTR_BUS_16_BIT)
                        spi->ppr_options &= ~MSG_EXT_PPR_DT_REQ;

                if ((*discenable & devinfo.target_mask) == 0)
                        spi->ppr_options &= ~MSG_EXT_PPR_IU_REQ;

                ahd_find_syncrate(ahd, &spi->sync_period,
                                  &spi->ppr_options, maxsync);
                ahd_validate_offset(ahd, /*tinfo limit*/NULL,
                                    spi->sync_period, &spi->sync_offset,
                                    spi->bus_width, ROLE_UNKNOWN);

                /* We use a period of 0 to represent async */
                if (spi->sync_offset == 0) {
                        spi->sync_period = 0;
                        spi->ppr_options = 0;
                }

                ahd_set_syncrate(ahd, &devinfo, spi->sync_period,
                                 spi->sync_offset, spi->ppr_options,
                                 update_type, /*paused*/FALSE);
        }
        cts->ccb_h.status = CAM_REQ_CMP;
}

static void
ahd_get_tran_settings(struct ahd_softc *ahd, int our_id, char channel,
                      struct ccb_trans_settings *cts)
{
        struct  ahd_devinfo devinfo;
        struct  ccb_trans_settings_scsi *scsi;
        struct  ccb_trans_settings_spi *spi;
        struct  ahd_initiator_tinfo *targ_info;
        struct  ahd_tmode_tstate *tstate;
        struct  ahd_transinfo *tinfo;

        scsi = &cts->proto_specific.scsi;
        spi = &cts->xport_specific.spi;
        ahd_compile_devinfo(&devinfo, our_id,
                            cts->ccb_h.target_id,
                            cts->ccb_h.target_lun,
                            channel, ROLE_UNKNOWN);
        targ_info = ahd_fetch_transinfo(ahd, devinfo.channel,
                                        devinfo.our_scsiid,
                                        devinfo.target, &tstate);

        if (cts->type == CTS_TYPE_CURRENT_SETTINGS)
                tinfo = &targ_info->curr;
        else
                tinfo = &targ_info->user;

        scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
        spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB;
        if (cts->type == CTS_TYPE_USER_SETTINGS) {
                if ((ahd->user_discenable & devinfo.target_mask) != 0)
                        spi->flags |= CTS_SPI_FLAGS_DISC_ENB;

                if ((ahd->user_tagenable & devinfo.target_mask) != 0)
                        scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB;
        } else {
                if ((tstate->discenable & devinfo.target_mask) != 0)
                        spi->flags |= CTS_SPI_FLAGS_DISC_ENB;

                if ((tstate->tagenable & devinfo.target_mask) != 0)
                        scsi->flags |= CTS_SCSI_FLAGS_TAG_ENB;
        }
        cts->protocol_version = tinfo->protocol_version;
        cts->transport_version = tinfo->transport_version;

        spi->sync_period = tinfo->period;
        spi->sync_offset = tinfo->offset;
        spi->bus_width = tinfo->width;
        spi->ppr_options = tinfo->ppr_options;

        cts->protocol = PROTO_SCSI;
        cts->transport = XPORT_SPI;
        spi->valid = CTS_SPI_VALID_SYNC_RATE
                   | CTS_SPI_VALID_SYNC_OFFSET
                   | CTS_SPI_VALID_BUS_WIDTH
                   | CTS_SPI_VALID_PPR_OPTIONS;

        if (cts->ccb_h.target_lun != CAM_LUN_WILDCARD) {
                scsi->valid = CTS_SCSI_VALID_TQ;
                spi->valid |= CTS_SPI_VALID_DISC;
        } else {
                scsi->valid = 0;
        }

        cts->ccb_h.status = CAM_REQ_CMP;
}

static void
ahd_async(void *callback_arg, uint32_t code, struct cam_path *path, void *arg)
{
        struct ahd_softc *ahd;
        struct cam_sim *sim;

        sim = (struct cam_sim *)callback_arg;
        ahd = (struct ahd_softc *)cam_sim_softc(sim);
        switch (code) {
        case AC_LOST_DEVICE:
        {
                struct  ahd_devinfo devinfo;

                ahd_compile_devinfo(&devinfo, SIM_SCSI_ID(ahd, sim),
                                    xpt_path_target_id(path),
                                    xpt_path_lun_id(path),
                                    SIM_CHANNEL(ahd, sim),
                                    ROLE_UNKNOWN);

                /*
                 * Revert to async/narrow transfers
                 * for the next device.
                 */
                ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
                              AHD_TRANS_GOAL|AHD_TRANS_CUR, /*paused*/FALSE);
                ahd_set_syncrate(ahd, &devinfo, /*period*/0, /*offset*/0,
                                 /*ppr_options*/0, AHD_TRANS_GOAL|AHD_TRANS_CUR,
                                 /*paused*/FALSE);
                break;
        }
        default:
                break;
        }
}

static void
ahd_execute_scb(void *arg, bus_dma_segment_t *dm_segs, int nsegments,
                int error)
{
        struct  scb *scb;
        union   ccb *ccb;
        struct  ahd_softc *ahd;
        struct  ahd_initiator_tinfo *tinfo;
        struct  ahd_tmode_tstate *tstate;
        u_int   mask;

        scb = (struct scb *)arg;
        ccb = scb->io_ctx;
        ahd = scb->ahd_softc;

        if (error != 0) {
                if (error == EFBIG)
                        aic_set_transaction_status(scb, CAM_REQ_TOO_BIG);
                else
                        aic_set_transaction_status(scb, CAM_REQ_CMP_ERR);
                if (nsegments != 0)
                        bus_dmamap_unload(ahd->buffer_dmat, scb->dmamap);
                ahd_free_scb(ahd, scb);
                xpt_done(ccb);
                return;
        }
        scb->sg_count = 0;
        if (nsegments != 0) {
                void *sg;
                u_int i;

                /* Copy the segments into our SG list */
                for (i = nsegments, sg = scb->sg_list; i > 0; i--) {
                        sg = ahd_sg_setup(ahd, scb, sg, dm_segs->ds_addr,
                                          dm_segs->ds_len,
                                          /*last*/i == 1);
                        dm_segs++;
                }

                ahd_sync_ccb(ahd, scb, ccb, false);

                if (ccb->ccb_h.func_code == XPT_CONT_TARGET_IO) {
                        struct target_data *tdata;

                        tdata = &scb->hscb->shared_data.tdata;
                        tdata->target_phases |= DPHASE_PENDING;
                        if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT)
                                tdata->data_phase = P_DATAOUT;
                        else
                                tdata->data_phase = P_DATAIN;
                }
        }

        /*
         * Last time we need to check if this SCB needs to
         * be aborted.
         */
        if (aic_get_transaction_status(scb) != CAM_REQ_INPROG) {
                if (nsegments != 0)
                        bus_dmamap_unload(ahd->buffer_dmat,
                                          scb->dmamap);
                ahd_free_scb(ahd, scb);
                xpt_done(ccb);
                return;
        }

        tinfo = ahd_fetch_transinfo(ahd, SCSIID_CHANNEL(ahd, scb->hscb->scsiid),
                                    SCSIID_OUR_ID(scb->hscb->scsiid),
                                    SCSIID_TARGET(ahd, scb->hscb->scsiid),
                                    &tstate);

        mask = SCB_GET_TARGET_MASK(ahd, scb);

        if ((tstate->discenable & mask) != 0
         && (ccb->ccb_h.flags & CAM_DIS_DISCONNECT) == 0)
                scb->hscb->control |= DISCENB;

        if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
                scb->flags |= SCB_PACKETIZED;
                if (scb->hscb->task_management != 0)
                        scb->hscb->control &= ~MK_MESSAGE;
        }

        if ((ccb->ccb_h.flags & CAM_NEGOTIATE) != 0
         && (tinfo->goal.width != 0
          || tinfo->goal.period != 0
          || tinfo->goal.ppr_options != 0)) {
                scb->flags |= SCB_NEGOTIATE;
                scb->hscb->control |= MK_MESSAGE;
        } else if ((tstate->auto_negotiate & mask) != 0) {
                scb->flags |= SCB_AUTO_NEGOTIATE;
                scb->hscb->control |= MK_MESSAGE;
        }

        LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);

        ccb->ccb_h.status |= CAM_SIM_QUEUED;

        aic_scb_timer_start(scb);

        if ((scb->flags & SCB_TARGET_IMMEDIATE) != 0) {
                /* Define a mapping from our tag to the SCB. */
                ahd->scb_data.scbindex[SCB_GET_TAG(scb)] = scb;
                ahd_pause(ahd);
                ahd_set_scbptr(ahd, SCB_GET_TAG(scb));
                ahd_outb(ahd, RETURN_1, CONT_MSG_LOOP_TARG);
                ahd_unpause(ahd);
        } else {
                ahd_queue_scb(ahd, scb);
        }

}

static void
ahd_poll(struct cam_sim *sim)
{
        ahd_intr(cam_sim_softc(sim));
}

static void
ahd_setup_data(struct ahd_softc *ahd, struct cam_sim *sim,
               struct ccb_scsiio *csio, struct scb *scb)
{
        struct hardware_scb *hscb;
        struct ccb_hdr *ccb_h;
        int error;

        hscb = scb->hscb;
        ccb_h = &csio->ccb_h;

        csio->resid = 0;
        csio->sense_resid = 0;
        if (ccb_h->func_code == XPT_SCSI_IO) {
                hscb->cdb_len = csio->cdb_len;
                if ((ccb_h->flags & CAM_CDB_POINTER) != 0) {
                        if (hscb->cdb_len > MAX_CDB_LEN
                         && (ccb_h->flags & CAM_CDB_PHYS) == 0) {
                                /*
                                 * Should CAM start to support CDB sizes
                                 * greater than 16 bytes, we could use
                                 * the sense buffer to store the CDB.
                                 */
                                aic_set_transaction_status(scb,
                                                           CAM_REQ_INVALID);
                                ahd_free_scb(ahd, scb);
                                xpt_done((union ccb *)csio);
                                return;
                        }
                        if ((ccb_h->flags & CAM_CDB_PHYS) != 0) {
                                hscb->shared_data.idata.cdb_from_host.cdbptr =
                                   aic_htole64((uintptr_t)csio->cdb_io.cdb_ptr);
                                hscb->shared_data.idata.cdb_from_host.cdblen =
                                   csio->cdb_len;
                                hscb->cdb_len |= SCB_CDB_LEN_PTR;
                        } else {
                                memcpy(hscb->shared_data.idata.cdb, 
                                       csio->cdb_io.cdb_ptr,
                                       hscb->cdb_len);
                        }
                } else {
                        if (hscb->cdb_len > MAX_CDB_LEN) {
                                aic_set_transaction_status(scb,
                                                           CAM_REQ_INVALID);
                                ahd_free_scb(ahd, scb);
                                xpt_done((union ccb *)csio);
                                return;
                        }
                        memcpy(hscb->shared_data.idata.cdb,
                               csio->cdb_io.cdb_bytes, hscb->cdb_len);
                }
        }
                
        error = bus_dmamap_load_ccb(ahd->buffer_dmat,
                                    scb->dmamap,
                                    (union ccb *)csio,
                                    ahd_execute_scb,
                                    scb, /*flags*/0);
        if (error == EINPROGRESS) {
                /*
                 * So as to maintain ordering, freeze the controller queue
                 * until our mapping is returned.
                 */
                xpt_freeze_simq(sim, /*count*/1);
                scb->io_ctx->ccb_h.status |= CAM_RELEASE_SIMQ;
        }
}

static void
ahd_abort_ccb(struct ahd_softc *ahd, struct cam_sim *sim, union ccb *ccb)
{
        union ccb *abort_ccb;

        abort_ccb = ccb->cab.abort_ccb;
        switch (abort_ccb->ccb_h.func_code) {
#ifdef AHD_TARGET_MODE
        case XPT_ACCEPT_TARGET_IO:
        case XPT_IMMEDIATE_NOTIFY:
        case XPT_CONT_TARGET_IO:
        {
                struct ahd_tmode_tstate *tstate;
                struct ahd_tmode_lstate *lstate;
                struct ccb_hdr_slist *list;
                cam_status status;

                status = ahd_find_tmode_devs(ahd, sim, abort_ccb, &tstate,
                                             &lstate, TRUE);

                if (status != CAM_REQ_CMP) {
                        ccb->ccb_h.status = status;
                        break;
                }

                if (abort_ccb->ccb_h.func_code == XPT_ACCEPT_TARGET_IO)
                        list = &lstate->accept_tios;
                else if (abort_ccb->ccb_h.func_code == XPT_IMMEDIATE_NOTIFY)
                        list = &lstate->immed_notifies;
                else
                        list = NULL;

                if (list != NULL) {
                        struct ccb_hdr *curelm;
                        int found;

                        curelm = SLIST_FIRST(list);
                        found = 0;
                        if (curelm == &abort_ccb->ccb_h) {
                                found = 1;
                                SLIST_REMOVE_HEAD(list, sim_links.sle);
                        } else {
                                while(curelm != NULL) {
                                        struct ccb_hdr *nextelm;

                                        nextelm =
                                            SLIST_NEXT(curelm, sim_links.sle);

                                        if (nextelm == &abort_ccb->ccb_h) {
                                                found = 1;
                                                SLIST_NEXT(curelm,
                                                           sim_links.sle) =
                                                    SLIST_NEXT(nextelm,
                                                               sim_links.sle);
                                                break;
                                        }
                                        curelm = nextelm;
                                }
                        }

                        if (found) {
                                abort_ccb->ccb_h.status = CAM_REQ_ABORTED;
                                xpt_done(abort_ccb);
                                ccb->ccb_h.status = CAM_REQ_CMP;
                        } else {
                                xpt_print_path(abort_ccb->ccb_h.path);
                                printf("Not found\n");
                                ccb->ccb_h.status = CAM_PATH_INVALID;
                        }
                        break;
                }
                /* FALLTHROUGH */
        }
#endif
        case XPT_SCSI_IO:
                /* XXX Fully implement the hard ones */
                ccb->ccb_h.status = CAM_UA_ABORT;
                break;
        default:
                ccb->ccb_h.status = CAM_REQ_INVALID;
                break;
        }
        xpt_done(ccb);
}

void
ahd_send_async(struct ahd_softc *ahd, char channel, u_int target,
                u_int lun, ac_code code, void *opt_arg)
{
        struct  ccb_trans_settings cts;
        struct cam_path *path;
        void *arg;
        int error;

        arg = NULL;
        error = ahd_create_path(ahd, channel, target, lun, &path);

        if (error != CAM_REQ_CMP)
                return;

        switch (code) {
        case AC_TRANSFER_NEG:
        {
                struct  ccb_trans_settings_scsi *scsi;

                cts.type = CTS_TYPE_CURRENT_SETTINGS;
                scsi = &cts.proto_specific.scsi;
                cts.ccb_h.path = path;
                cts.ccb_h.target_id = target;
                cts.ccb_h.target_lun = lun;
                ahd_get_tran_settings(ahd, ahd->our_id, channel, &cts);
                arg = &cts;
                scsi->valid &= ~CTS_SCSI_VALID_TQ;
                scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
                if (opt_arg == NULL)
                        break;
                if (*((ahd_queue_alg *)opt_arg) == AHD_QUEUE_TAGGED)
                        scsi->flags |= ~CTS_SCSI_FLAGS_TAG_ENB;
                scsi->valid |= CTS_SCSI_VALID_TQ;
                break;
        }
        case AC_SENT_BDR:
        case AC_BUS_RESET:
                break;
        default:
                panic("ahd_send_async: Unexpected async event");
        }
        xpt_async(code, path, arg);
        xpt_free_path(path);
}

void
ahd_platform_set_tags(struct ahd_softc *ahd,
                      struct ahd_devinfo *devinfo, int enable)
{
}

int
ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
{
        ahd->platform_data = malloc(sizeof(struct ahd_platform_data), M_DEVBUF,
            M_NOWAIT | M_ZERO);
        if (ahd->platform_data == NULL)
                return (ENOMEM);
        return (0);
}

void
ahd_platform_free(struct ahd_softc *ahd)
{
        struct ahd_platform_data *pdata;

        pdata = ahd->platform_data;
        if (pdata != NULL) {
                if (pdata->regs[0] != NULL)
                        bus_release_resource(ahd->dev_softc,
                                             pdata->regs_res_type[0],
                                             pdata->regs_res_id[0],
                                             pdata->regs[0]);

                if (pdata->regs[1] != NULL)
                        bus_release_resource(ahd->dev_softc,
                                             pdata->regs_res_type[1],
                                             pdata->regs_res_id[1],
                                             pdata->regs[1]);

                if (pdata->irq != NULL)
                        bus_release_resource(ahd->dev_softc,
                                             pdata->irq_res_type,
                                             0, pdata->irq);

                if (pdata->sim != NULL) {
                        xpt_async(AC_LOST_DEVICE, pdata->path, NULL);
                        xpt_free_path(pdata->path);
                        xpt_bus_deregister(cam_sim_path(pdata->sim));
                        cam_sim_free(pdata->sim, /*free_devq*/TRUE);
                }
                if (pdata->eh != NULL)
                        EVENTHANDLER_DEREGISTER(shutdown_final, pdata->eh);
                free(ahd->platform_data, M_DEVBUF);
        }
}

int
ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd)
{
        /* We don't sort softcs under FreeBSD so report equal always */
        return (0);
}

int
ahd_detach(device_t dev)
{
        struct ahd_softc *ahd;

        device_printf(dev, "detaching device\n");
        ahd = device_get_softc(dev);
        ahd_lock(ahd);
        TAILQ_REMOVE(&ahd_tailq, ahd, links);
        ahd_intr_enable(ahd, FALSE);
        bus_teardown_intr(dev, ahd->platform_data->irq, ahd->platform_data->ih);
        ahd_unlock(ahd);
        ahd_free(ahd);
        return (0);
}

#if 0
static void
ahd_dump_targcmd(struct target_cmd *cmd)
{
        uint8_t *byte;
        uint8_t *last_byte;
        int i;

        byte = &cmd->initiator_channel;
        /* Debugging info for received commands */
        last_byte = &cmd[1].initiator_channel;

        i = 0;
        while (byte < last_byte) {
                if (i == 0)
                        printf("\t");
                printf("%#x", *byte++);
                i++;
                if (i == 8) {
                        printf("\n");
                        i = 0;
                } else {
                        printf(", ");
                }
        }
}
#endif

static int
ahd_modevent(module_t mod, int type, void *data)
{
        /* XXX Deal with busy status on unload. */
        /* XXX Deal with unknown events */
        return 0;
}
  
static moduledata_t ahd_mod = {
        "ahd",
        ahd_modevent,
        NULL
};

/********************************** DDB Hooks *********************************/
#ifdef DDB
static struct ahd_softc *ahd_ddb_softc;
static int ahd_ddb_paused;
static int ahd_ddb_paused_on_entry;
DB_COMMAND(ahd_sunit, ahd_ddb_sunit)
{
        struct ahd_softc *list_ahd;

        ahd_ddb_softc = NULL;
        TAILQ_FOREACH(list_ahd, &ahd_tailq, links) {
                if (list_ahd->unit == addr)
                        ahd_ddb_softc = list_ahd;
        }
        if (ahd_ddb_softc == NULL)
                db_error("No matching softc found!\n");
}

DB_COMMAND(ahd_pause, ahd_ddb_pause)
{
        if (ahd_ddb_softc == NULL) {
                db_error("Must set unit with ahd_sunit first!\n");
                return;
        }
        if (ahd_ddb_paused == 0) {
                ahd_ddb_paused++;
                if (ahd_is_paused(ahd_ddb_softc)) {
                        ahd_ddb_paused_on_entry++;
                        return;
                }
                ahd_pause(ahd_ddb_softc);
        }
}

DB_COMMAND(ahd_unpause, ahd_ddb_unpause)
{
        if (ahd_ddb_softc == NULL) {
                db_error("Must set unit with ahd_sunit first!\n");
                return;
        }
        if (ahd_ddb_paused != 0) {
                ahd_ddb_paused = 0;
                if (ahd_ddb_paused_on_entry)
                        return;
                ahd_unpause(ahd_ddb_softc);
        } else if (ahd_ddb_paused_on_entry != 0) {
                /* Two unpauses to clear a paused on entry. */
                ahd_ddb_paused_on_entry = 0;
                ahd_unpause(ahd_ddb_softc);
        }
}

DB_COMMAND(ahd_in, ahd_ddb_in)
{
        int c;
        int size;

        if (ahd_ddb_softc == NULL) {
                db_error("Must set unit with ahd_sunit first!\n");
                return;
        }
        if (have_addr == 0)
                return;

        size = 1;
        while ((c = *modif++) != '\0') {
                switch (c) {
                case 'b':
                        size = 1;
                        break;
                case 'w':
                        size = 2;
                        break;
                case 'l':
                        size = 4;
                break;
                }
        }

        if (count <= 0)
                count = 1;
        while (--count >= 0) {
                db_printf("%04lx (M)%x: \t", (u_long)addr,
                          ahd_inb(ahd_ddb_softc, MODE_PTR));
                switch (size) {
                case 1:
                        db_printf("%02x\n", ahd_inb(ahd_ddb_softc, addr));
                        break;
                case 2:
                        db_printf("%04x\n", ahd_inw(ahd_ddb_softc, addr));
                        break;
                case 4:
                        db_printf("%08x\n", ahd_inl(ahd_ddb_softc, addr));
                        break;
                }
        }
}

DB_COMMAND_FLAGS(ahd_out, ahd_ddb_out, CS_MORE)
{
        db_expr_t old_value;
        db_expr_t new_value;
        int       size;

        if (ahd_ddb_softc == NULL) {
                db_error("Must set unit with ahd_sunit first!\n");
                return;
        }

        switch (modif[0]) {
        case '\0':
        case 'b':
                size = 1;
                break;
        case 'h':
                size = 2;
                break;
        case 'l':
                size = 4;
                break;
        default:
                db_error("Unknown size\n");
                return;
        }

        while (db_expression(&new_value)) {
                switch (size) {
                default:
                case 1:
                        old_value = ahd_inb(ahd_ddb_softc, addr);
                        ahd_outb(ahd_ddb_softc, addr, new_value);
                        break;
                case 2:
                        old_value = ahd_inw(ahd_ddb_softc, addr);
                        ahd_outw(ahd_ddb_softc, addr, new_value);
                        break;
                case 4:
                        old_value = ahd_inl(ahd_ddb_softc, addr);
                        ahd_outl(ahd_ddb_softc, addr, new_value);
                        break;
                }
                db_printf("%04lx (M)%x: \t0x%lx\t=\t0x%lx",
                          (u_long)addr, ahd_inb(ahd_ddb_softc, MODE_PTR),
                          (u_long)old_value, (u_long)new_value);
                addr += size;
        }
        db_skip_to_eol();
}

DB_COMMAND(ahd_dump, ahd_ddb_dump)
{
        if (ahd_ddb_softc == NULL) {
                db_error("Must set unit with ahd_sunit first!\n");
                return;
        }
        ahd_dump_card_state(ahd_ddb_softc);
}

#endif

DECLARE_MODULE(ahd, ahd_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
MODULE_DEPEND(ahd, cam, 1, 1, 1);
MODULE_VERSION(ahd, 1);