/*
* Catch an interrupt from the adaptor
*/
static void
ahbintr(void *arg)
{
struct ahb_softc *ahb;
u_int intstat;
u_int32_t mbox;
ahb = (struct ahb_softc *)arg;
while (ahb_inb(ahb, HOSTSTAT) & HOSTSTAT_INTPEND) {
/*
* Fetch information about this interrupt.
*/
intstat = ahb_inb(ahb, INTSTAT);
mbox = ahb_inl(ahb, MBOXIN0);
/*
* Reset interrupt latch.
*/
ahb_outb(ahb, CONTROL, CNTRL_CLRINT);
/*
* Process the completed operation
*/
switch (intstat & INTSTAT_MASK) {
case INTSTAT_ECB_OK:
case INTSTAT_ECB_CMPWRETRY:
case INTSTAT_ECB_CMPWERR:
ahbdone(ahb, mbox, intstat);
break;
case INTSTAT_AEN_OCCURED:
if ((intstat & INTSTAT_TARGET_MASK) == ahb->scsi_id) {
/* Bus Reset */
xpt_print_path(ahb->path);
switch (mbox) {
case HS_SCSI_RESET_ADAPTER:
printf("Host Adapter Initiated "
"Bus Reset occurred\n");
break;
case HS_SCSI_RESET_INCOMING:
printf("Bus Reset Initiated "
"by another device occurred\n");
break;
}
/* Notify the XPT */
xpt_async(AC_BUS_RESET, ahb->path, NULL);
break;
}
printf("Unsupported initiator selection AEN occured\n");
break;
case INTSTAT_IMMED_OK:
case INTSTAT_IMMED_ERR:
ahbhandleimmed(ahb, mbox, intstat);
break;
case INTSTAT_HW_ERR:
panic("Unrecoverable hardware Error Occurred\n");
}
}
}
static void
ptdtor(struct cam_periph *periph)
{
struct pt_softc *softc;
softc = (struct pt_softc *)periph->softc;
devstat_remove_entry(&softc->device_stats);
destroy_dev(softc->dev);
xpt_print_path(periph->path);
printf("removing device entry\n");
free(softc, M_DEVBUF);
}
static void
ptoninvalidate(struct cam_periph *periph)
{
int s;
struct pt_softc *softc;
struct buf *q_bp;
struct ccb_setasync csa;
softc = (struct pt_softc *)periph->softc;
/*
* De-register any async callbacks.
*/
xpt_setup_ccb(&csa.ccb_h, periph->path,
/* priority */ 5);
csa.ccb_h.func_code = XPT_SASYNC_CB;
csa.event_enable = 0;
csa.callback = ptasync;
csa.callback_arg = periph;
xpt_action((union ccb *)&csa);
softc->flags |= PT_FLAG_DEVICE_INVALID;
/*
* Although the oninvalidate() routines are always called at
* splsoftcam, we need to be at splbio() here to keep the buffer
* queue from being modified while we traverse it.
*/
s = splbio();
/*
* Return all queued I/O with ENXIO.
* XXX Handle any transactions queued to the card
* with XPT_ABORT_CCB.
*/
while ((q_bp = bufq_first(&softc->buf_queue)) != NULL){
bufq_remove(&softc->buf_queue, q_bp);
q_bp->b_resid = q_bp->b_bcount;
q_bp->b_error = ENXIO;
q_bp->b_flags |= B_ERROR;
biodone(q_bp);
}
splx(s);
xpt_print_path(periph->path);
printf("lost device\n");
}
void
isp_done(struct ccb_scsiio *sccb)
{
struct ispsoftc *isp = XS_ISP(sccb);
if (XS_NOERR(sccb))
XS_SETERR(sccb, CAM_REQ_CMP);
sccb->ccb_h.status &= ~CAM_STATUS_MASK;
sccb->ccb_h.status |= sccb->ccb_h.spriv_field0;
if ((sccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP &&
(sccb->scsi_status != SCSI_STATUS_OK)) {
sccb->ccb_h.status &= ~CAM_STATUS_MASK;
sccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
}
if ((sccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
if ((sccb->ccb_h.status & CAM_DEV_QFRZN) == 0) {
IDPRINTF(3, ("%s: freeze devq %d.%d ccbstat 0x%x\n",
isp->isp_name, sccb->ccb_h.target_id,
sccb->ccb_h.target_lun, sccb->ccb_h.status));
xpt_freeze_devq(sccb->ccb_h.path, 1);
sccb->ccb_h.status |= CAM_DEV_QFRZN;
}
}
if (isp->isp_osinfo.simqfrozen & SIMQFRZ_RESOURCE) {
isp->isp_osinfo.simqfrozen &= ~SIMQFRZ_RESOURCE;
sccb->ccb_h.status |= CAM_RELEASE_SIMQ;
xpt_release_simq(isp->isp_sim, 1);
}
sccb->ccb_h.status &= ~CAM_SIM_QUEUED;
if (CAM_DEBUGGED(sccb->ccb_h.path, ISPDDB) &&
(sccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
xpt_print_path(sccb->ccb_h.path);
printf("cam completion status 0x%x\n", sccb->ccb_h.status);
}
xpt_done((union ccb *) sccb);
}
void
adv_timeout(void *arg)
{
int s;
union ccb *ccb;
struct adv_softc *adv;
struct adv_ccb_info *cinfo;
ccb = (union ccb *)arg;
adv = (struct adv_softc *)xpt_path_sim(ccb->ccb_h.path)->softc;
cinfo = (struct adv_ccb_info *)ccb->ccb_h.ccb_cinfo_ptr;
xpt_print_path(ccb->ccb_h.path);
printf("Timed out\n");
s = splcam();
/* Have we been taken care of already?? */
if (cinfo == NULL || cinfo->state == ACCB_FREE) {
splx(s);
return;
}
adv_stop_execution(adv);
if ((cinfo->state & ACCB_ABORT_QUEUED) == 0) {
struct ccb_hdr *ccb_h;
/*
* In order to simplify the recovery process, we ask the XPT
* layer to halt the queue of new transactions and we traverse
* the list of pending CCBs and remove their timeouts. This
* means that the driver attempts to clear only one error
* condition at a time. In general, timeouts that occur
* close together are related anyway, so there is no benefit
* in attempting to handle errors in parrallel. Timeouts will
* be reinstated when the recovery process ends.
*/
adv_set_state(adv, ADV_IN_TIMEOUT);
/* This CCB is the CCB representing our recovery actions */
cinfo->state |= ACCB_RECOVERY_CCB|ACCB_ABORT_QUEUED;
ccb_h = LIST_FIRST(&adv->pending_ccbs);
while (ccb_h != NULL) {
untimeout(adv_timeout, ccb_h, ccb_h->timeout_ch);
ccb_h = LIST_NEXT(ccb_h, sim_links.le);
}
/* XXX Should send a BDR */
/* Attempt an abort as our first tact */
xpt_print_path(ccb->ccb_h.path);
printf("Attempting abort\n");
adv_abort_ccb(adv, ccb->ccb_h.target_id,
ccb->ccb_h.target_lun, ccb,
CAM_CMD_TIMEOUT, /*queued_only*/FALSE);
ccb->ccb_h.timeout_ch =
timeout(adv_timeout, ccb, 2 * hz);
} else {
/* Our attempt to perform an abort failed, go for a reset */
xpt_print_path(ccb->ccb_h.path);
printf("Resetting bus\n");
ccb->ccb_h.status &= ~CAM_STATUS_MASK;
ccb->ccb_h.status |= CAM_CMD_TIMEOUT;
adv_reset_bus(adv, /*initiate_reset*/TRUE);
}
adv_start_execution(adv);
splx(s);
}
void
adv_done(struct adv_softc *adv, union ccb *ccb, u_int done_stat,
u_int host_stat, u_int scsi_status, u_int q_no)
{
struct adv_ccb_info *cinfo;
cinfo = (struct adv_ccb_info *)ccb->ccb_h.ccb_cinfo_ptr;
LIST_REMOVE(&ccb->ccb_h, sim_links.le);
untimeout(adv_timeout, ccb, ccb->ccb_h.timeout_ch);
if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
bus_dmasync_op_t op;
if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
op = BUS_DMASYNC_POSTREAD;
else
op = BUS_DMASYNC_POSTWRITE;
bus_dmamap_sync(adv->buffer_dmat, cinfo->dmamap, op);
bus_dmamap_unload(adv->buffer_dmat, cinfo->dmamap);
}
switch (done_stat) {
case QD_NO_ERROR:
if (host_stat == QHSTA_NO_ERROR) {
ccb->ccb_h.status = CAM_REQ_CMP;
break;
}
xpt_print_path(ccb->ccb_h.path);
printf("adv_done - queue done without error, "
"but host status non-zero(%x)\n", host_stat);
/*FALLTHROUGH*/
case QD_WITH_ERROR:
switch (host_stat) {
case QHSTA_M_TARGET_STATUS_BUSY:
case QHSTA_M_BAD_QUEUE_FULL_OR_BUSY:
/*
* Assume that if we were a tagged transaction
* the target reported queue full. Otherwise,
* report busy. The firmware really should just
* pass the original status back up to us even
* if it thinks the target was in error for
* returning this status as no other transactions
* from this initiator are in effect, but this
* ignores multi-initiator setups and there is
* evidence that the firmware gets its per-device
* transaction counts screwed up occassionally.
*/
ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
if ((ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) != 0
&& host_stat != QHSTA_M_TARGET_STATUS_BUSY)
scsi_status = SCSI_STATUS_QUEUE_FULL;
else
scsi_status = SCSI_STATUS_BUSY;
adv_abort_ccb(adv, ccb->ccb_h.target_id,
ccb->ccb_h.target_lun,
/*ccb*/NULL, CAM_REQUEUE_REQ,
/*queued_only*/TRUE);
/*FALLTHROUGH*/
case QHSTA_M_NO_AUTO_REQ_SENSE:
case QHSTA_NO_ERROR:
ccb->csio.scsi_status = scsi_status;
switch (scsi_status) {
case SCSI_STATUS_CHECK_COND:
case SCSI_STATUS_CMD_TERMINATED:
ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
/* Structure copy */
ccb->csio.sense_data =
adv->sense_buffers[q_no - 1];
/* FALLTHROUGH */
case SCSI_STATUS_BUSY:
case SCSI_STATUS_RESERV_CONFLICT:
case SCSI_STATUS_QUEUE_FULL:
case SCSI_STATUS_COND_MET:
case SCSI_STATUS_INTERMED:
case SCSI_STATUS_INTERMED_COND_MET:
ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
break;
case SCSI_STATUS_OK:
ccb->ccb_h.status |= CAM_REQ_CMP;
break;
}
break;
case QHSTA_M_SEL_TIMEOUT:
ccb->ccb_h.status = CAM_SEL_TIMEOUT;
break;
case QHSTA_M_DATA_OVER_RUN:
ccb->ccb_h.status = CAM_DATA_RUN_ERR;
break;
case QHSTA_M_UNEXPECTED_BUS_FREE:
ccb->ccb_h.status = CAM_UNEXP_BUSFREE;
break;
case QHSTA_M_BAD_BUS_PHASE_SEQ:
ccb->ccb_h.status = CAM_SEQUENCE_FAIL;
break;
case QHSTA_M_BAD_CMPL_STATUS_IN:
/* No command complete after a status message */
ccb->ccb_h.status = CAM_SEQUENCE_FAIL;
break;
case QHSTA_D_EXE_SCSI_Q_BUSY_TIMEOUT:
case QHSTA_M_WTM_TIMEOUT:
case QHSTA_M_HUNG_REQ_SCSI_BUS_RESET:
/* The SCSI bus hung in a phase */
ccb->ccb_h.status = CAM_SEQUENCE_FAIL;
adv_reset_bus(adv, /*initiate_reset*/TRUE);
break;
case QHSTA_M_AUTO_REQ_SENSE_FAIL:
ccb->ccb_h.status = CAM_AUTOSENSE_FAIL;
break;
case QHSTA_D_QDONE_SG_LIST_CORRUPTED:
case QHSTA_D_ASC_DVC_ERROR_CODE_SET:
case QHSTA_D_HOST_ABORT_FAILED:
case QHSTA_D_EXE_SCSI_Q_FAILED:
case QHSTA_D_ASPI_NO_BUF_POOL:
case QHSTA_M_BAD_TAG_CODE:
case QHSTA_D_LRAM_CMP_ERROR:
case QHSTA_M_MICRO_CODE_ERROR_HALT:
default:
panic("%s: Unhandled Host status error %x",
adv_name(adv), host_stat);
/* NOTREACHED */
}
break;
case QD_ABORTED_BY_HOST:
/* Don't clobber any, more explicit, error codes we've set */
if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INPROG)
ccb->ccb_h.status = CAM_REQ_ABORTED;
break;
default:
xpt_print_path(ccb->ccb_h.path);
printf("adv_done - queue done with unknown status %x:%x\n",
done_stat, host_stat);
ccb->ccb_h.status = CAM_REQ_CMP_ERR;
break;
}
adv_clear_state(adv, ccb);
if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP
&& (ccb->ccb_h.status & CAM_DEV_QFRZN) == 0) {
xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
ccb->ccb_h.status |= CAM_DEV_QFRZN;
}
adv_free_ccb_info(adv, cinfo);
/*
* Null this out so that we catch driver bugs that cause a
* ccb to be completed twice.
*/
ccb->ccb_h.ccb_cinfo_ptr = NULL;
ccb->ccb_h.status &= ~CAM_SIM_QUEUED;
xpt_done(ccb);
}
static void
ahatimeout(void *arg)
{
struct aha_ccb *accb;
union ccb *ccb;
struct aha_softc *aha;
uint32_t paddr;
struct ccb_hdr *ccb_h;
accb = (struct aha_ccb *)arg;
ccb = accb->ccb;
aha = (struct aha_softc *)ccb->ccb_h.ccb_aha_ptr;
mtx_assert(&aha->lock, MA_OWNED);
xpt_print_path(ccb->ccb_h.path);
printf("CCB %p - timed out\n", (void *)accb);
if ((accb->flags & ACCB_ACTIVE) == 0) {
xpt_print_path(ccb->ccb_h.path);
printf("CCB %p - timed out CCB already completed\n",
(void *)accb);
return;
}
/*
* In order to simplify the recovery process, we ask the XPT
* layer to halt the queue of new transactions and we traverse
* the list of pending CCBs and remove their timeouts. This
* means that the driver attempts to clear only one error
* condition at a time. In general, timeouts that occur
* close together are related anyway, so there is no benefit
* in attempting to handle errors in parallel. Timeouts will
* be reinstated when the recovery process ends.
*/
if ((accb->flags & ACCB_DEVICE_RESET) == 0) {
if ((accb->flags & ACCB_RELEASE_SIMQ) == 0) {
xpt_freeze_simq(aha->sim, /*count*/1);
accb->flags |= ACCB_RELEASE_SIMQ;
}
ccb_h = LIST_FIRST(&aha->pending_ccbs);
while (ccb_h != NULL) {
struct aha_ccb *pending_accb;
pending_accb = (struct aha_ccb *)ccb_h->ccb_accb_ptr;
callout_stop(&pending_accb->timer);
ccb_h = LIST_NEXT(ccb_h, sim_links.le);
}
}
if ((accb->flags & ACCB_DEVICE_RESET) != 0
|| aha->cur_outbox->action_code != AMBO_FREE) {
/*
* Try a full host adapter/SCSI bus reset.
* We do this only if we have already attempted
* to clear the condition with a BDR, or we cannot
* attempt a BDR for lack of mailbox resources.
*/
ccb->ccb_h.status = CAM_CMD_TIMEOUT;
ahareset(aha, /*hardreset*/TRUE);
device_printf(aha->dev, "No longer in timeout\n");
} else {
/*
* Send a Bus Device Reset message:
* The target that is holding up the bus may not
* be the same as the one that triggered this timeout
* (different commands have different timeout lengths),
* but we have no way of determining this from our
* timeout handler. Our strategy here is to queue a
* BDR message to the target of the timed out command.
* If this fails, we'll get another timeout 2 seconds
* later which will attempt a bus reset.
*/
accb->flags |= ACCB_DEVICE_RESET;
callout_reset(&accb->timer, 2 * hz, ahatimeout, accb);
aha->recovery_accb->hccb.opcode = INITIATOR_BUS_DEV_RESET;
/* No Data Transfer */
aha->recovery_accb->hccb.datain = TRUE;
aha->recovery_accb->hccb.dataout = TRUE;
aha->recovery_accb->hccb.ahastat = 0;
aha->recovery_accb->hccb.sdstat = 0;
aha->recovery_accb->hccb.target = ccb->ccb_h.target_id;
/* Tell the adapter about this command */
paddr = ahaccbvtop(aha, aha->recovery_accb);
ahautoa24(paddr, aha->cur_outbox->ccb_addr);
aha->cur_outbox->action_code = AMBO_START;
aha_outb(aha, COMMAND_REG, AOP_START_MBOX);
ahanextoutbox(aha);
}
}
static void
ptdone(struct cam_periph *periph, union ccb *done_ccb)
{
struct pt_softc *softc;
struct ccb_scsiio *csio;
softc = (struct pt_softc *)periph->softc;
csio = &done_ccb->csio;
switch (csio->ccb_h.ccb_state) {
case PT_CCB_BUFFER_IO:
case PT_CCB_BUFFER_IO_UA:
{
struct bio *bp;
int oldspl;
bp = (struct bio *)done_ccb->ccb_h.ccb_bp;
if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
int error;
int s;
int sf;
if ((csio->ccb_h.ccb_state & PT_CCB_RETRY_UA) != 0)
sf = SF_RETRY_UA;
else
sf = 0;
error = pterror(done_ccb, CAM_RETRY_SELTO, sf);
if (error == ERESTART) {
/*
* A retry was scheuled, so
* just return.
*/
return;
}
if (error != 0) {
struct bio *q_bp;
s = splbio();
if (error == ENXIO) {
/*
* Catastrophic error. Mark our device
* as invalid.
*/
xpt_print_path(periph->path);
printf("Invalidating device\n");
softc->flags |= PT_FLAG_DEVICE_INVALID;
}
/*
* return all queued I/O with EIO, so that
* the client can retry these I/Os in the
* proper order should it attempt to recover.
*/
while ((q_bp = bioq_first(&softc->bio_queue))
!= NULL) {
bioq_remove(&softc->bio_queue, q_bp);
q_bp->bio_resid = q_bp->bio_bcount;
biofinish(q_bp, NULL, EIO);
}
splx(s);
bp->bio_error = error;
bp->bio_resid = bp->bio_bcount;
bp->bio_flags |= BIO_ERROR;
} else {
bp->bio_resid = csio->resid;
bp->bio_error = 0;
if (bp->bio_resid != 0) {
/* Short transfer ??? */
bp->bio_flags |= BIO_ERROR;
}
}
if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
cam_release_devq(done_ccb->ccb_h.path,
/*relsim_flags*/0,
/*reduction*/0,
/*timeout*/0,
/*getcount_only*/0);
} else {
bp->bio_resid = csio->resid;
if (bp->bio_resid != 0)
bp->bio_flags |= BIO_ERROR;
}
/*
* Block out any asyncronous callbacks
* while we touch the pending ccb list.
*/
oldspl = splcam();
LIST_REMOVE(&done_ccb->ccb_h, periph_links.le);
splx(oldspl);
biofinish(bp, &softc->device_stats, 0);
break;
}
case PT_CCB_WAITING:
/* Caller will release the CCB */
wakeup(&done_ccb->ccb_h.cbfcnp);
return;
}
xpt_release_ccb(done_ccb);
}
static void
ahbprocesserror(struct ahb_softc *ahb, struct ecb *ecb, union ccb *ccb)
{
struct hardware_ecb *hecb;
struct ecb_status *status;
hecb = &ecb->hecb;
status = &ecb->status;
switch (status->ha_status) {
case HS_OK:
ccb->csio.scsi_status = status->scsi_status;
if (status->scsi_status != 0) {
ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR;
if (status->sense_stored) {
ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
ccb->csio.sense_resid =
ccb->csio.sense_len - status->sense_len;
bcopy(&ecb->sense, &ccb->csio.sense_data,
status->sense_len);
}
}
break;
case HS_TARGET_NOT_ASSIGNED:
ccb->ccb_h.status = CAM_PATH_INVALID;
break;
case HS_SEL_TIMEOUT:
ccb->ccb_h.status = CAM_SEL_TIMEOUT;
break;
case HS_DATA_RUN_ERR:
ahbcalcresid(ahb, ecb, ccb);
break;
case HS_UNEXPECTED_BUSFREE:
ccb->ccb_h.status = CAM_UNEXP_BUSFREE;
break;
case HS_INVALID_PHASE:
ccb->ccb_h.status = CAM_SEQUENCE_FAIL;
break;
case HS_REQUEST_SENSE_FAILED:
ccb->ccb_h.status = CAM_AUTOSENSE_FAIL;
break;
case HS_TAG_MSG_REJECTED:
{
struct ccb_trans_settings neg;
struct ccb_trans_settings_scsi *scsi = &neg.proto_specific.scsi;
xpt_print_path(ccb->ccb_h.path);
printf("refuses tagged commands. Performing "
"non-tagged I/O\n");
memset(&neg, 0, sizeof (neg));
neg.protocol = PROTO_SCSI;
neg.protocol_version = SCSI_REV_2;
neg.transport = XPORT_SPI;
neg.transport_version = 2;
scsi->flags = CTS_SCSI_VALID_TQ;
xpt_setup_ccb(&neg.ccb_h, ccb->ccb_h.path, /*priority*/1);
xpt_async(AC_TRANSFER_NEG, ccb->ccb_h.path, &neg);
ahb->tags_permitted &= ~(0x01 << ccb->ccb_h.target_id);
ccb->ccb_h.status = CAM_MSG_REJECT_REC;
break;
}
case HS_FIRMWARE_LOAD_REQ:
case HS_HARDWARE_ERR:
/*
* Tell the system that the Adapter
* is no longer functional.
*/
ccb->ccb_h.status = CAM_NO_HBA;
break;
case HS_CMD_ABORTED_HOST:
case HS_CMD_ABORTED_ADAPTER:
case HS_ATN_TARGET_FAILED:
case HS_SCSI_RESET_ADAPTER:
case HS_SCSI_RESET_INCOMING:
ccb->ccb_h.status = CAM_SCSI_BUS_RESET;
break;
case HS_INVALID_ECB_PARAM:
printf("ahb%ld: opcode 0x%02x, flag_word1 0x%02x, flag_word2 0x%02x\n",
ahb->unit, hecb->opcode, hecb->flag_word1, hecb->flag_word2);
ccb->ccb_h.status = CAM_SCSI_BUS_RESET;
break;
case HS_DUP_TCB_RECEIVED:
case HS_INVALID_OPCODE:
case HS_INVALID_CMD_LINK:
case HS_PROGRAM_CKSUM_ERROR:
panic("ahb%ld: Can't happen host status %x occurred",
ahb->unit, status->ha_status);
break;
}
if (ccb->ccb_h.status != CAM_REQ_CMP) {
xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
ccb->ccb_h.status |= CAM_DEV_QFRZN;
}
}
static void
ahbtimeout(void *arg)
{
struct ecb *ecb;
union ccb *ccb;
struct ahb_softc *ahb;
int s;
ecb = (struct ecb *)arg;
ccb = ecb->ccb;
ahb = (struct ahb_softc *)ccb->ccb_h.ccb_ahb_ptr;
xpt_print_path(ccb->ccb_h.path);
printf("ECB %p - timed out\n", (void *)ecb);
s = splcam();
if ((ecb->state & ECB_ACTIVE) == 0) {
xpt_print_path(ccb->ccb_h.path);
printf("ECB %p - timed out ECB already completed\n",
(void *)ecb);
splx(s);
return;
}
/*
* In order to simplify the recovery process, we ask the XPT
* layer to halt the queue of new transactions and we traverse
* the list of pending CCBs and remove their timeouts. This
* means that the driver attempts to clear only one error
* condition at a time. In general, timeouts that occur
* close together are related anyway, so there is no benefit
* in attempting to handle errors in parrallel. Timeouts will
* be reinstated when the recovery process ends.
*/
if ((ecb->state & ECB_DEVICE_RESET) == 0) {
struct ccb_hdr *ccb_h;
if ((ecb->state & ECB_RELEASE_SIMQ) == 0) {
xpt_freeze_simq(ahb->sim, /*count*/1);
ecb->state |= ECB_RELEASE_SIMQ;
}
ccb_h = LIST_FIRST(&ahb->pending_ccbs);
while (ccb_h != NULL) {
struct ecb *pending_ecb;
pending_ecb = (struct ecb *)ccb_h->ccb_ecb_ptr;
untimeout(ahbtimeout, pending_ecb, ccb_h->timeout_ch);
ccb_h = LIST_NEXT(ccb_h, sim_links.le);
}
/* Store for our interrupt handler */
ahb->immed_ecb = ecb;
/*
* Send a Bus Device Reset message:
* The target that is holding up the bus may not
* be the same as the one that triggered this timeout
* (different commands have different timeout lengths),
* but we have no way of determining this from our
* timeout handler. Our strategy here is to queue a
* BDR message to the target of the timed out command.
* If this fails, we'll get another timeout 2 seconds
* later which will attempt a bus reset.
*/
xpt_print_path(ccb->ccb_h.path);
printf("Queuing BDR\n");
ecb->state |= ECB_DEVICE_RESET;
ccb->ccb_h.timeout_ch =
timeout(ahbtimeout, (caddr_t)ecb, 2 * hz);
ahb->immed_cmd = IMMED_RESET;
ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ccb->ccb_h.target_id);
} else if ((ecb->state & ECB_SCSIBUS_RESET) != 0) {
/*
* Try a SCSI bus reset. We do this only if we
* have already attempted to clear the condition with a BDR.
*/
xpt_print_path(ccb->ccb_h.path);
printf("Attempting SCSI Bus reset\n");
ecb->state |= ECB_SCSIBUS_RESET;
ccb->ccb_h.timeout_ch =
timeout(ahbtimeout, (caddr_t)ecb, 2 * hz);
ahb->immed_cmd = IMMED_RESET;
ahbqueuembox(ahb, IMMED_RESET, ATTN_IMMED|ahb->scsi_id);
} else {
/* Bring out the hammer... */
ahbreset(ahb);
/* Simulate the reset complete interrupt */
ahbhandleimmed(ahb, 0, ahb->scsi_id|INTSTAT_IMMED_OK);
}
splx(s);
}
