sys/dev/aic7xxx/aic7xxx_osm.c

root/sys/dev/aic7xxx/aic7xxx_osm.c
/*-
 * Bus independent FreeBSD shim for the aic7xxx based Adaptec SCSI controllers
 *
 * Copyright (c) 1994-2001 Justin T. Gibbs.
 * 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/aic7xxx_osm.c#20 $
 */

#include <dev/aic7xxx/aic7xxx_osm.h>
#include <dev/aic7xxx/aic7xxx_inline.h>

#include <sys/kthread.h>

#ifndef AHC_TMODE_ENABLE
#define AHC_TMODE_ENABLE 0
#endif

#include <dev/aic7xxx/aic_osm_lib.c>

#define ccb_scb_ptr spriv_ptr0

#if 0
static void     ahc_dump_targcmd(struct target_cmd *cmd);
#endif
static int      ahc_modevent(module_t mod, int type, void *data);
static void     ahc_action(struct cam_sim *sim, union ccb *ccb);
static void     ahc_get_tran_settings(struct ahc_softc *ahc,
                                      int our_id, char channel,
                                      struct ccb_trans_settings *cts);
static void     ahc_async(void *callback_arg, uint32_t code,
                          struct cam_path *path, void *arg);
static void     ahc_execute_scb(void *arg, bus_dma_segment_t *dm_segs,
                                int nsegments, int error);
static void     ahc_poll(struct cam_sim *sim);
static void     ahc_setup_data(struct ahc_softc *ahc, struct cam_sim *sim,
                               struct ccb_scsiio *csio, struct scb *scb);
static void     ahc_abort_ccb(struct ahc_softc *ahc, struct cam_sim *sim,
                              union ccb *ccb);
static int      ahc_create_path(struct ahc_softc *ahc,
                                char channel, u_int target, u_int lun,
                                struct cam_path **path);

static int
ahc_create_path(struct ahc_softc *ahc, char channel, u_int target,
                u_int lun, struct cam_path **path)
{
        path_id_t path_id;

        if (channel == 'B')
                path_id = cam_sim_path(ahc->platform_data->sim_b);
        else 
                path_id = cam_sim_path(ahc->platform_data->sim);

        return (xpt_create_path(path, /*periph*/NULL,
                                path_id, target, lun));
}

int
ahc_map_int(struct ahc_softc *ahc)
{
        int error;
        int zero;
        int shareable;

        zero = 0;
        shareable = (ahc->flags & AHC_EDGE_INTERRUPT) ? 0: RF_SHAREABLE;
        ahc->platform_data->irq =
            bus_alloc_resource_any(ahc->dev_softc, SYS_RES_IRQ, &zero,
                                   RF_ACTIVE | shareable);
        if (ahc->platform_data->irq == NULL) {
                device_printf(ahc->dev_softc,
                              "bus_alloc_resource() failed to allocate IRQ\n");
                return (ENOMEM);
        }
        ahc->platform_data->irq_res_type = SYS_RES_IRQ;

        /* Hook up our interrupt handler */
        error = bus_setup_intr(ahc->dev_softc, ahc->platform_data->irq,
                               INTR_TYPE_CAM|INTR_MPSAFE, NULL, 
                               ahc_platform_intr, ahc, &ahc->platform_data->ih);

        if (error != 0)
                device_printf(ahc->dev_softc, "bus_setup_intr() failed: %d\n",
                              error);
        return (error);
}

int
aic7770_map_registers(struct ahc_softc *ahc, u_int unused_ioport_arg)
{
        struct  resource *regs;
        int     rid;

        rid = 0;
        regs = bus_alloc_resource_any(ahc->dev_softc, SYS_RES_IOPORT, &rid,
                                      RF_ACTIVE);
        if (regs == NULL) {
                device_printf(ahc->dev_softc, "Unable to map I/O space?!\n");
                return ENOMEM;
        }
        ahc->platform_data->regs_res_type = SYS_RES_IOPORT;
        ahc->platform_data->regs_res_id = rid;
        ahc->platform_data->regs = regs;
        ahc->tag = rman_get_bustag(regs);
        ahc->bsh = rman_get_bushandle(regs);
        return (0);
}

/*
 * Attach all the sub-devices we can find
 */
int
ahc_attach(struct ahc_softc *ahc)
{
        char   ahc_info[256];
        struct ccb_setasync csa;
        struct cam_devq *devq;
        int bus_id;
        int bus_id2;
        struct cam_sim *sim;
        struct cam_sim *sim2;
        struct cam_path *path;
        struct cam_path *path2;
        int count;

        count = 0;
        sim = NULL;
        sim2 = NULL;
        path = NULL;
        path2 = NULL;

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

        ahc_controller_info(ahc, ahc_info);
        printf("%s\n", ahc_info);
        ahc_lock(ahc);

        /*
         * Attach secondary channel first if the user has
         * declared it the primary channel.
         */
        if ((ahc->features & AHC_TWIN) != 0
         && (ahc->flags & AHC_PRIMARY_CHANNEL) != 0) {
                bus_id = 1;
                bus_id2 = 0;
        } else {
                bus_id = 0;
                bus_id2 = 1;
        }

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

        /*
         * Construct our first channel SIM entry
         */
        sim = cam_sim_alloc(ahc_action, ahc_poll, "ahc", ahc,
                            device_get_unit(ahc->dev_softc),
                            &ahc->platform_data->mtx, 1, AHC_MAX_QUEUE, devq);
        if (sim == NULL) {
                cam_simq_free(devq);
                goto fail;
        }

        if (xpt_bus_register(sim, ahc->dev_softc, bus_id) != 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 = ahc_async;
        csa.callback_arg = sim;
        xpt_action((union ccb *)&csa);
        count++;

        if (ahc->features & AHC_TWIN) {
                sim2 = cam_sim_alloc(ahc_action, ahc_poll, "ahc",
                                    ahc, device_get_unit(ahc->dev_softc),
                                    &ahc->platform_data->mtx, 1,
                                    AHC_MAX_QUEUE, devq);

                if (sim2 == NULL) {
                        printf("ahc_attach: Unable to attach second "
                               "bus due to resource shortage");
                        goto fail;
                }
                
                if (xpt_bus_register(sim2, ahc->dev_softc, bus_id2) !=
                    CAM_SUCCESS) {
                        printf("ahc_attach: Unable to attach second "
                               "bus due to resource shortage");
                        /*
                         * We do not want to destroy the device queue
                         * because the first bus is using it.
                         */
                        cam_sim_free(sim2, /*free_devq*/FALSE);
                        goto fail;
                }

                if (xpt_create_path(&path2, /*periph*/NULL,
                                    cam_sim_path(sim2),
                                    CAM_TARGET_WILDCARD,
                                    CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
                        xpt_bus_deregister(cam_sim_path(sim2));
                        cam_sim_free(sim2, /*free_devq*/FALSE);
                        sim2 = NULL;
                        goto fail;
                }
                xpt_setup_ccb(&csa.ccb_h, path2, /*priority*/5);
                csa.ccb_h.func_code = XPT_SASYNC_CB;
                csa.event_enable = AC_LOST_DEVICE;
                csa.callback = ahc_async;
                csa.callback_arg = sim2;
                xpt_action((union ccb *)&csa);
                count++;
        }

fail:
        if ((ahc->features & AHC_TWIN) != 0
         && (ahc->flags & AHC_PRIMARY_CHANNEL) != 0) {
                ahc->platform_data->sim_b = sim;
                ahc->platform_data->path_b = path;
                ahc->platform_data->sim = sim2;
                ahc->platform_data->path = path2;
        } else {
                ahc->platform_data->sim = sim;
                ahc->platform_data->path = path;
                ahc->platform_data->sim_b = sim2;
                ahc->platform_data->path_b = path2;
        }
        ahc_unlock(ahc);

        if (count != 0) {
                /* We have to wait until after any system dumps... */
                ahc->platform_data->eh =
                    EVENTHANDLER_REGISTER(shutdown_final, ahc_shutdown,
                                          ahc, SHUTDOWN_PRI_DEFAULT);
                ahc_intr_enable(ahc, TRUE);
        }

        return (count);
}

/*
 * Catch an interrupt from the adapter
 */
void
ahc_platform_intr(void *arg)
{
        struct  ahc_softc *ahc;

        ahc = (struct ahc_softc *)arg; 
        ahc_lock(ahc);
        ahc_intr(ahc);
        ahc_unlock(ahc);
}

static void
ahc_sync_ccb(struct ahc_softc *ahc, 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(ahc->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
ahc_done(struct ahc_softc *ahc, struct scb *scb)
{
        union ccb *ccb;

        CAM_DEBUG(scb->io_ctx->ccb_h.path, CAM_DEBUG_TRACE,
                  ("ahc_done - scb %d\n", scb->hscb->tag));

        ccb = scb->io_ctx;
        LIST_REMOVE(scb, pending_links);
        if ((scb->flags & SCB_TIMEDOUT) != 0)
                LIST_REMOVE(scb, timedout_links);
        if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
                struct scb_tailq *untagged_q;
                int target_offset;

                target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
                untagged_q = &ahc->untagged_queues[target_offset];
                TAILQ_REMOVE(untagged_q, scb, links.tqe);
                scb->flags &= ~SCB_UNTAGGEDQ;
                ahc_run_untagged_queue(ahc, untagged_q);
        }

        callout_stop(&scb->io_timer);

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

        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 (ahc->pending_device != NULL
                 && xpt_path_comp(ahc->pending_device->path, ccb_path) == 0) {
                        if ((ccb->ccb_h.flags & CAM_SEND_STATUS) != 0) {
                                ahc->pending_device = NULL;
                        } else {
                                if (bootverbose) {
                                        xpt_print_path(ccb->ccb_h.path);
                                        printf("Still connected\n");
                                }
                                aic_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;
                ahc_free_scb(ahc, scb);
                xpt_done(ccb);
                return;
        }

        /*
         * If the recovery SCB completes, we have to be
         * out of our timeout.
         */
        if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
                struct  scb *list_scb;

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

                        ahc_print_path(ahc, 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,
                       ahc_get_sense_buf(ahc, scb),
                       (aic_le32toh(scb->sg_list->len) & AHC_SG_LEN_MASK)
                       - ccb->csio.sense_resid);
                scb->io_ctx->ccb_h.status |= CAM_AUTOSNS_VALID;
        }
        ccb->ccb_h.status &= ~CAM_SIM_QUEUED;
        ahc_free_scb(ahc, scb);
        xpt_done(ccb);
}

static void
ahc_action(struct cam_sim *sim, union ccb *ccb)
{
        struct  ahc_softc *ahc;
        struct  ahc_tmode_lstate *lstate;
        u_int   target_id;
        u_int   our_id;

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

        ahc = (struct ahc_softc *)cam_sim_softc(sim);

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

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

                status = ahc_find_tmode_devs(ahc, 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 = ahc->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 ((ahc->flags & AHC_TQINFIFO_BLOCKED) != 0)
                                ahc_run_tqinfifo(ahc, /*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 */
        }
        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;     

                if ((ahc->flags & AHC_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.
                 */
                if ((scb = ahc_get_scb(ahc)) == NULL) {
                        xpt_freeze_simq(sim, /*count*/1);
                        ahc->flags |= AHC_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(ahc, 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;
                        ahc_execute_scb(scb, NULL, 0, 0);
                } else {
                        if (ccb->ccb_h.func_code == XPT_CONT_TARGET_IO) {
                                struct target_data *tdata;

                                tdata = &hscb->shared_data.tdata;
                                if (ahc->pending_device == lstate)
                                        scb->flags |= SCB_TARGET_IMMEDIATE;
                                hscb->control |= TARGET_SCB;
                                scb->flags |= SCB_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 = ccb->csio.tag_id;
                        }
                        if (ccb->ccb_h.flags & CAM_TAG_ACTION_VALID)
                                hscb->control |= ccb->csio.tag_action;
                        
                        ahc_setup_data(ahc, sim, &ccb->csio, scb);
                }
                break;
        }
        case XPT_NOTIFY_ACKNOWLEDGE:
        case XPT_IMMEDIATE_NOTIFY:
        {
                struct     ahc_tmode_tstate *tstate;
                struct     ahc_tmode_lstate *lstate;
                cam_status status;

                status = ahc_find_tmode_devs(ahc, 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;
                ahc_send_lstate_events(ahc, lstate);
                break;
        }
        case XPT_EN_LUN:                /* Enable LUN as a target */
                ahc_handle_en_lun(ahc, sim, ccb);
                xpt_done(ccb);
                break;
        case XPT_ABORT:                 /* Abort the specified CCB */
        {
                ahc_abort_ccb(ahc, sim, ccb);
                break;
        }
        case XPT_SET_TRAN_SETTINGS:
        {
                struct  ahc_devinfo devinfo;
                struct  ccb_trans_settings *cts;
                struct  ccb_trans_settings_scsi *scsi;
                struct  ccb_trans_settings_spi *spi;
                struct  ahc_initiator_tinfo *tinfo;
                struct  ahc_tmode_tstate *tstate;
                uint16_t *discenable;
                uint16_t *tagenable;
                u_int   update_type;

                cts = &ccb->cts;
                scsi = &cts->proto_specific.scsi;
                spi = &cts->xport_specific.spi;
                ahc_compile_devinfo(&devinfo, SIM_SCSI_ID(ahc, sim),
                                    cts->ccb_h.target_id,
                                    cts->ccb_h.target_lun,
                                    SIM_CHANNEL(ahc, sim),
                                    ROLE_UNKNOWN);
                tinfo = ahc_fetch_transinfo(ahc, devinfo.channel,
                                            devinfo.our_scsiid,
                                            devinfo.target, &tstate);
                update_type = 0;
                if (cts->type == CTS_TYPE_CURRENT_SETTINGS) {
                        update_type |= AHC_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 |= AHC_TRANS_USER;
                        discenable = &ahc->user_discenable;
                        tagenable = &ahc->user_tagenable;
                        tinfo->user.protocol_version =
                            cts->protocol_version;
                        tinfo->user.transport_version =
                            cts->transport_version;
                } else {
                        ccb->ccb_h.status = CAM_REQ_INVALID;
                        xpt_done(ccb);
                        break;
                }
                
                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) {
                        ahc_validate_width(ahc, /*tinfo limit*/NULL,
                                           &spi->bus_width, ROLE_UNKNOWN);
                        ahc_set_width(ahc, &devinfo, spi->bus_width,
                                      update_type, /*paused*/FALSE);
                }

                if ((spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) {
                        if (update_type == AHC_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 == AHC_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 == AHC_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)) {
                        struct ahc_syncrate *syncrate;
                        u_int maxsync;

                        if ((ahc->features & AHC_ULTRA2) != 0)
                                maxsync = AHC_SYNCRATE_DT;
                        else if ((ahc->features & AHC_ULTRA) != 0)
                                maxsync = AHC_SYNCRATE_ULTRA;
                        else
                                maxsync = AHC_SYNCRATE_FAST;

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

                        syncrate = ahc_find_syncrate(ahc, &spi->sync_period,
                                                     &spi->ppr_options,
                                                     maxsync);
                        ahc_validate_offset(ahc, /*tinfo limit*/NULL,
                                            syncrate, &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;
                        }

                        ahc_set_syncrate(ahc, &devinfo, syncrate,
                                         spi->sync_period, spi->sync_offset,
                                         spi->ppr_options, update_type,
                                         /*paused*/FALSE);
                }
                ccb->ccb_h.status = CAM_REQ_CMP;
                xpt_done(ccb);
                break;
        }
        case XPT_GET_TRAN_SETTINGS:
        /* Get default/user set transfer settings for the target */
        {
                ahc_get_tran_settings(ahc, SIM_SCSI_ID(ahc, sim),
                                      SIM_CHANNEL(ahc, sim), &ccb->cts);
                xpt_done(ccb);
                break;
        }
        case XPT_CALC_GEOMETRY:
        {
                int extended;

                extended = SIM_IS_SCSIBUS_B(ahc, sim)
                         ? ahc->flags & AHC_EXTENDED_TRANS_B
                         : ahc->flags & AHC_EXTENDED_TRANS_A;
                aic_calc_geometry(&ccb->ccg, extended);
                xpt_done(ccb);
                break;
        }
        case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
        {
                int  found;
                
                found = ahc_reset_channel(ahc, SIM_CHANNEL(ahc, sim),
                                          /*initiate reset*/TRUE);
                if (bootverbose) {
                        xpt_print_path(SIM_PATH(ahc, 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 ((ahc->features & AHC_WIDE) != 0)
                        cpi->hba_inquiry |= PI_WIDE_16;
                if ((ahc->features & AHC_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 = (ahc->features & AHC_WIDE) ? 15 : 7;
                cpi->max_lun = AHC_NUM_LUNS - 1;
                if (SIM_IS_SCSIBUS_B(ahc, sim)) {
                        cpi->initiator_id = ahc->our_id_b;
                        if ((ahc->flags & AHC_RESET_BUS_B) == 0)
                                cpi->hba_misc |= PIM_NOBUSRESET;
                } else {
                        cpi->initiator_id = ahc->our_id;
                        if ((ahc->flags & AHC_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 = 2;
                cpi->xport_specific.spi.ppr_options = SID_SPI_CLOCK_ST;
                if ((ahc->features & AHC_DT) != 0) {
                        cpi->transport_version = 3;
                        cpi->xport_specific.spi.ppr_options =
                            SID_SPI_CLOCK_DT_ST;
                }
                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
ahc_get_tran_settings(struct ahc_softc *ahc, int our_id, char channel,
                      struct ccb_trans_settings *cts)
{
        struct  ahc_devinfo devinfo;
        struct  ccb_trans_settings_scsi *scsi;
        struct  ccb_trans_settings_spi *spi;
        struct  ahc_initiator_tinfo *targ_info;
        struct  ahc_tmode_tstate *tstate;
        struct  ahc_transinfo *tinfo;

        scsi = &cts->proto_specific.scsi;
        spi = &cts->xport_specific.spi;
        ahc_compile_devinfo(&devinfo, our_id,
                            cts->ccb_h.target_id,
                            cts->ccb_h.target_lun,
                            channel, ROLE_UNKNOWN);
        targ_info = ahc_fetch_transinfo(ahc, 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 ((ahc->user_discenable & devinfo.target_mask) != 0)
                        spi->flags |= CTS_SPI_FLAGS_DISC_ENB;

                if ((ahc->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
ahc_async(void *callback_arg, uint32_t code, struct cam_path *path, void *arg)
{
        struct ahc_softc *ahc;
        struct cam_sim *sim;

        sim = (struct cam_sim *)callback_arg;
        ahc = (struct ahc_softc *)cam_sim_softc(sim);
        switch (code) {
        case AC_LOST_DEVICE:
        {
                struct  ahc_devinfo devinfo;

                ahc_compile_devinfo(&devinfo, SIM_SCSI_ID(ahc, sim),
                                    xpt_path_target_id(path),
                                    xpt_path_lun_id(path),
                                    SIM_CHANNEL(ahc, sim),
                                    ROLE_UNKNOWN);

                /*
                 * Revert to async/narrow transfers
                 * for the next device.
                 */
                ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
                              AHC_TRANS_GOAL|AHC_TRANS_CUR, /*paused*/FALSE);
                ahc_set_syncrate(ahc, &devinfo, /*syncrate*/NULL,
                                 /*period*/0, /*offset*/0, /*ppr_options*/0,
                                 AHC_TRANS_GOAL|AHC_TRANS_CUR,
                                 /*paused*/FALSE);
                break;
        }
        default:
                break;
        }
}

static void
ahc_execute_scb(void *arg, bus_dma_segment_t *dm_segs, int nsegments,
                int error)
{
        struct  scb *scb;
        union   ccb *ccb;
        struct  ahc_softc *ahc;
        struct  ahc_initiator_tinfo *tinfo;
        struct  ahc_tmode_tstate *tstate;
        u_int   mask;

        scb = (struct scb *)arg;
        ccb = scb->io_ctx;
        ahc = scb->ahc_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(ahc->buffer_dmat, scb->dmamap);
                ahc_free_scb(ahc, scb);
                xpt_done(ccb);
                return;
        }
        if (nsegments != 0) {
                struct    ahc_dma_seg *sg;
                bus_dma_segment_t *end_seg;

                end_seg = dm_segs + nsegments;

                /* Copy the segments into our SG list */
                sg = scb->sg_list;
                while (dm_segs < end_seg) {
                        uint32_t len;

                        sg->addr = aic_htole32(dm_segs->ds_addr);
                        len = dm_segs->ds_len
                            | ((dm_segs->ds_addr >> 8) & 0x7F000000);
                        sg->len = aic_htole32(len);
                        sg++;
                        dm_segs++;
                }
                
                /*
                 * Note where to find the SG entries in bus space.
                 * We also set the full residual flag which the 
                 * sequencer will clear as soon as a data transfer
                 * occurs.
                 */
                scb->hscb->sgptr = aic_htole32(scb->sg_list_phys|SG_FULL_RESID);

                ahc_sync_ccb(ahc, 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;
                        /*
                         * CAM data direction is relative to the initiator.
                         */
                        if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT)
                                tdata->data_phase = P_DATAOUT;
                        else
                                tdata->data_phase = P_DATAIN;

                        /*
                         * If the transfer is of an odd length and in the
                         * "in" direction (scsi->HostBus), then it may
                         * trigger a bug in the 'WideODD' feature of
                         * non-Ultra2 chips.  Force the total data-length
                         * to be even by adding an extra, 1 byte, SG,
                         * element.  We do this even if we are not currently
                         * negotiated wide as negotiation could occur before
                         * this command is executed.
                         */
                        if ((ahc->bugs & AHC_TMODE_WIDEODD_BUG) != 0
                         && (ccb->csio.dxfer_len & 0x1) != 0
                         && (ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT) {
                                nsegments++;
                                if (nsegments > AHC_NSEG) {
                                        aic_set_transaction_status(scb,
                                            CAM_REQ_TOO_BIG);
                                        bus_dmamap_unload(ahc->buffer_dmat,
                                                          scb->dmamap);
                                        ahc_free_scb(ahc, scb);
                                        xpt_done(ccb);
                                        return;
                                }
                                sg->addr = aic_htole32(ahc->dma_bug_buf);
                                sg->len = aic_htole32(1);
                                sg++;
                        }
                }
                sg--;
                sg->len |= aic_htole32(AHC_DMA_LAST_SEG);

                /* Copy the first SG into the "current" data pointer area */
                scb->hscb->dataptr = scb->sg_list->addr;
                scb->hscb->datacnt = scb->sg_list->len;
        } else {
                scb->hscb->sgptr = aic_htole32(SG_LIST_NULL);
                scb->hscb->dataptr = 0;
                scb->hscb->datacnt = 0;
        }

        scb->sg_count = nsegments;

        /*
         * 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(ahc->buffer_dmat, scb->dmamap);
                ahc_free_scb(ahc, scb);
                xpt_done(ccb);
                return;
        }

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

        mask = SCB_GET_TARGET_MASK(ahc, scb);
        scb->hscb->scsirate = tinfo->scsirate;
        scb->hscb->scsioffset = tinfo->curr.offset;
        if ((tstate->ultraenb & mask) != 0)
                scb->hscb->control |= ULTRAENB;

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

        if ((ccb->ccb_h.flags & CAM_NEGOTIATE) != 0
         && (tinfo->goal.width != 0
          || tinfo->goal.offset != 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(&ahc->pending_scbs, scb, pending_links);

        ccb->ccb_h.status |= CAM_SIM_QUEUED;

        /*
         * We only allow one untagged transaction
         * per target in the initiator role unless
         * we are storing a full busy target *lun*
         * table in SCB space.
         */
        if ((scb->hscb->control & (TARGET_SCB|TAG_ENB)) == 0
         && (ahc->flags & AHC_SCB_BTT) == 0) {
                struct scb_tailq *untagged_q;
                int target_offset;

                target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
                untagged_q = &(ahc->untagged_queues[target_offset]);
                TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
                scb->flags |= SCB_UNTAGGEDQ;
                if (TAILQ_FIRST(untagged_q) != scb) {
                        return;
                }
        }
        scb->flags |= SCB_ACTIVE;

        /*
         * Timers are disabled while recovery is in progress.
         */
        aic_scb_timer_start(scb);

        if ((scb->flags & SCB_TARGET_IMMEDIATE) != 0) {
                /* Define a mapping from our tag to the SCB. */
                ahc->scb_data->scbindex[scb->hscb->tag] = scb;
                ahc_pause(ahc);
                if ((ahc->flags & AHC_PAGESCBS) == 0)
                        ahc_outb(ahc, SCBPTR, scb->hscb->tag);
                ahc_outb(ahc, TARG_IMMEDIATE_SCB, scb->hscb->tag);
                ahc_unpause(ahc);
        } else {
                ahc_queue_scb(ahc, scb);
        }
}

static void
ahc_poll(struct cam_sim *sim)
{
        struct ahc_softc *ahc;

        ahc = (struct ahc_softc *)cam_sim_softc(sim);
        ahc_intr(ahc);
}

static void
ahc_setup_data(struct ahc_softc *ahc, 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 > sizeof(hscb->cdb32)
                         || (ccb_h->flags & CAM_CDB_PHYS) != 0) {
                                aic_set_transaction_status(scb,
                                                           CAM_REQ_INVALID);
                                ahc_free_scb(ahc, scb);
                                xpt_done((union ccb *)csio);
                                return;
                        }
                        if (hscb->cdb_len > 12) {
                                memcpy(hscb->cdb32, 
                                       csio->cdb_io.cdb_ptr,
                                       hscb->cdb_len);
                                scb->flags |= SCB_CDB32_PTR;
                        } else {
                                memcpy(hscb->shared_data.cdb, 
                                       csio->cdb_io.cdb_ptr,
                                       hscb->cdb_len);
                        }
                } else {
                        if (hscb->cdb_len > 12) {
                                memcpy(hscb->cdb32, csio->cdb_io.cdb_bytes,
                                       hscb->cdb_len);
                                scb->flags |= SCB_CDB32_PTR;
                        } else {
                                memcpy(hscb->shared_data.cdb,
                                       csio->cdb_io.cdb_bytes,
                                       hscb->cdb_len);
                        }
                }
        }
                
        error = bus_dmamap_load_ccb(ahc->buffer_dmat,
                                    scb->dmamap,
                                    (union ccb *)csio,
                                    ahc_execute_scb,
                                    scb,
                                    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
ahc_abort_ccb(struct ahc_softc *ahc, struct cam_sim *sim, union ccb *ccb)
{
        union ccb *abort_ccb;

        abort_ccb = ccb->cab.abort_ccb;
        switch (abort_ccb->ccb_h.func_code) {
        case XPT_ACCEPT_TARGET_IO:
        case XPT_IMMEDIATE_NOTIFY:
        case XPT_CONT_TARGET_IO:
        {
                struct ahc_tmode_tstate *tstate;
                struct ahc_tmode_lstate *lstate;
                struct ccb_hdr_slist *list;
                cam_status status;

                status = ahc_find_tmode_devs(ahc, 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 */
        }
        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
ahc_send_async(struct ahc_softc *ahc, 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 = ahc_create_path(ahc, 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;
                ahc_get_tran_settings(ahc, channel == 'A' ? ahc->our_id
                                                          : ahc->our_id_b,
                                      channel, &cts);
                arg = &cts;
                scsi->valid &= ~CTS_SCSI_VALID_TQ;
                scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB;
                if (opt_arg == NULL)
                        break;
                if (*((ahc_queue_alg *)opt_arg) == AHC_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("ahc_send_async: Unexpected async event");
        }
        xpt_async(code, path, arg);
        xpt_free_path(path);
}

void
ahc_platform_set_tags(struct ahc_softc *ahc,
                      struct ahc_devinfo *devinfo, int enable)
{
}

int
ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
{
        ahc->platform_data = malloc(sizeof(struct ahc_platform_data), M_DEVBUF,
            M_NOWAIT | M_ZERO);
        if (ahc->platform_data == NULL)
                return (ENOMEM);
        return (0);
}

void
ahc_platform_free(struct ahc_softc *ahc)
{
        struct ahc_platform_data *pdata;

        pdata = ahc->platform_data;
        if (pdata != NULL) {
                if (pdata->regs != NULL)
                        bus_release_resource(ahc->dev_softc,
                                             pdata->regs_res_type,
                                             pdata->regs_res_id,
                                             pdata->regs);

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

                if (pdata->sim_b != NULL) {
                        xpt_async(AC_LOST_DEVICE, pdata->path_b, NULL);
                        xpt_free_path(pdata->path_b);
                        xpt_bus_deregister(cam_sim_path(pdata->sim_b));
                        cam_sim_free(pdata->sim_b, /*free_devq*/TRUE);
                }
                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(ahc->platform_data, M_DEVBUF);
        }
}

int
ahc_softc_comp(struct ahc_softc *lahc, struct ahc_softc *rahc)
{
        /* We don't sort softcs under FreeBSD so report equal always */
        return (0);
}

int
ahc_detach(device_t dev)
{
        struct ahc_softc *ahc;

        device_printf(dev, "detaching device\n");
        ahc = device_get_softc(dev);
        ahc_lock(ahc);
        TAILQ_REMOVE(&ahc_tailq, ahc, links);
        ahc_intr_enable(ahc, FALSE);
        bus_teardown_intr(dev, ahc->platform_data->irq, ahc->platform_data->ih);
        ahc_unlock(ahc);
        ahc_free(ahc);
        return (0);
}

#if 0
static void
ahc_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
ahc_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 ahc_mod = {
        "ahc",
        ahc_modevent,
        NULL
};

DECLARE_MODULE(ahc, ahc_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
MODULE_DEPEND(ahc, cam, 1, 1, 1);
MODULE_VERSION(ahc, 1);