/*
* Check Errors
*/
int
sd_interpret_sense(struct scsi_xfer *xs)
{
struct scsi_sense_data *sense = &xs->sense;
struct scsi_link *sc_link = xs->sc_link;
struct sd_softc *sc = sc_link->device_softc;
u_int8_t serr = sense->error_code & SSD_ERRCODE;
int retval;
/*
* Let the generic code handle everything except a few categories of
* LUN not ready errors on open devices.
*/
if (((sc_link->flags & SDEV_OPEN) == 0) ||
(serr != SSD_ERRCODE_CURRENT && serr != SSD_ERRCODE_DEFERRED) ||
((sense->flags & SSD_KEY) != SKEY_NOT_READY) ||
(sense->extra_len < 6))
return (scsi_interpret_sense(xs));
switch (ASC_ASCQ(sense)) {
case SENSE_NOT_READY_BECOMING_READY:
SC_DEBUG(sc_link, SDEV_DB1, ("becoming ready.\n"));
retval = scsi_delay(xs, 5);
break;
case SENSE_NOT_READY_INIT_REQUIRED:
SC_DEBUG(sc_link, SDEV_DB1, ("spinning up\n"));
retval = scsi_start(sc->sc_link, SSS_START,
SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_NOSLEEP);
if (retval == 0)
retval = ERESTART;
else if (retval == ENOMEM)
/* Can't issue the command. Fall back on a delay. */
retval = scsi_delay(xs, 5);
else
SC_DEBUG(sc_link, SDEV_DB1, ("spin up failed (%#x)\n",
retval));
break;
default:
retval = scsi_interpret_sense(xs);
break;
}
return (retval);
}
/*
* Look at the returned sense and act on the error and detirmine
* The unix error number to pass back... (0 = report no error)
* (-1 = continue processing)
*/
int
ch_interpret_sense(struct scsi_xfer *xs)
{
struct scsi_sense_data *sense = &xs->sense;
struct scsi_link *sc_link = xs->sc_link;
u_int8_t serr = sense->error_code & SSD_ERRCODE;
u_int8_t skey = sense->flags & SSD_KEY;
if (((sc_link->flags & SDEV_OPEN) == 0) ||
(serr != SSD_ERRCODE_CURRENT && serr != SSD_ERRCODE_DEFERRED))
return (scsi_interpret_sense(xs));
switch (skey) {
/*
* We do custom processing in ch for the unit becoming ready case.
* in this case we do not allow xs->retries to be decremented
* only on the "Unit Becoming Ready" case. This is because tape
* changers report "Unit Becoming Ready" when they rescan their
* state (i.e. when the door got opened) and can take a long time
* for large units. Rather than having a massive timeout for
* all operations (which would cause other problems) we allow
* changers to wait (but be interruptable with Ctrl-C) forever
* as long as they are reporting that they are becoming ready.
* all other cases are handled as per the default.
*/
case SKEY_NOT_READY:
if ((xs->flags & SCSI_IGNORE_NOT_READY) != 0)
return (0);
switch (ASC_ASCQ(sense)) {
case SENSE_NOT_READY_BECOMING_READY:
SC_DEBUG(sc_link, SDEV_DB1, ("not ready: busy (%#x)\n",
sense->add_sense_code_qual));
/* don't count this as a retry */
xs->retries++;
return (scsi_delay(xs, 1));
default:
return (scsi_interpret_sense(xs));
}
default:
return (scsi_interpret_sense(xs));
}
}
void
sd_buf_done(struct scsi_xfer *xs)
{
struct sd_softc *sc = xs->sc_link->device_softc;
struct buf *bp = xs->cookie;
int error, s;
switch (xs->error) {
case XS_NOERROR:
bp->b_error = 0;
bp->b_resid = xs->resid;
break;
case XS_NO_CCB:
/* The adapter is busy, requeue the buf and try it later. */
disk_unbusy(&sc->sc_dk, bp->b_bcount - xs->resid,
bp->b_flags & B_READ);
bufq_requeue(&sc->sc_bufq, bp);
scsi_xs_put(xs);
SET(sc->flags, SDF_WAITING);
timeout_add(&sc->sc_timeout, 1);
return;
case XS_SENSE:
case XS_SHORTSENSE:
#ifdef SCSIDEBUG
scsi_sense_print_debug(xs);
#endif
error = sd_interpret_sense(xs);
if (error == 0) {
bp->b_error = 0;
bp->b_resid = xs->resid;
break;
}
if (error != ERESTART) {
bp->b_error = error;
xs->retries = 0;
}
goto retry;
case XS_BUSY:
if (xs->retries) {
if (scsi_delay(xs, 1) != ERESTART)
xs->retries = 0;
}
goto retry;
case XS_TIMEOUT:
retry:
if (xs->retries--) {
scsi_xs_exec(xs);
return;
}
/* FALLTHROUGH */
default:
if (bp->b_error == 0)
bp->b_error = EIO;
bp->b_flags |= B_ERROR;
bp->b_resid = bp->b_bcount;
break;
}
disk_unbusy(&sc->sc_dk, bp->b_bcount - xs->resid,
bp->b_flags & B_READ);
s = splbio();
biodone(bp);
splx(s);
scsi_xs_put(xs);
}
