static int
chopen(dev_t dev, int flags, int fmt, struct lwp *l)
{
struct ch_softc *sc;
struct scsipi_periph *periph;
struct scsipi_adapter *adapt;
int unit, error;
unit = CHUNIT(dev);
sc = device_lookup_private(&ch_cd, unit);
if (sc == NULL)
return (ENXIO);
periph = sc->sc_periph;
adapt = periph->periph_channel->chan_adapter;
/*
* Only allow one open at a time.
*/
if (periph->periph_flags & PERIPH_OPEN)
return (EBUSY);
if ((error = scsipi_adapter_addref(adapt)) != 0)
return (error);
/*
* Make sure the unit is on-line. If a UNIT ATTENTION
* occurs, we will mark that an Init-Element-Status is
* needed in ch_get_params().
*
* We ignore NOT READY in case e.g a magazine isn't actually
* loaded into the changer or a tape isn't in the drive.
*/
error = scsipi_test_unit_ready(periph, XS_CTL_IGNORE_NOT_READY);
if (error)
goto bad;
periph->periph_flags |= PERIPH_OPEN;
/*
* Make sure our parameters are up to date.
*/
if ((error = ch_get_params(sc, 0)) != 0)
goto bad;
return (0);
bad:
scsipi_adapter_delref(adapt);
periph->periph_flags &= ~PERIPH_OPEN;
return (error);
}
static void
chattach(device_t parent, device_t self, void *aux)
{
struct ch_softc *sc = device_private(self);
struct scsipibus_attach_args *sa = aux;
struct scsipi_periph *periph = sa->sa_periph;
sc->sc_dev = self;
selinit(&sc->sc_selq);
/* Glue into the SCSI bus */
sc->sc_periph = periph;
periph->periph_dev = sc->sc_dev;
periph->periph_switch = &ch_switch;
printf("\n");
/*
* Find out our device's quirks.
*/
ch_get_quirks(sc, &sa->sa_inqbuf);
/*
* Some changers require a long time to settle out, to do
* tape inventory, for instance.
*/
if (sc->sc_settledelay) {
printf("%s: waiting %d seconds for changer to settle...\n",
device_xname(sc->sc_dev), sc->sc_settledelay);
delay(1000000 * sc->sc_settledelay);
}
/*
* Get information about the device. Note we can't use
* interrupts yet.
*/
if (ch_get_params(sc, XS_CTL_DISCOVERY|XS_CTL_IGNORE_MEDIA_CHANGE))
printf("%s: offline\n", device_xname(sc->sc_dev));
else {
#define PLURAL(c) (c) == 1 ? "" : "s"
printf("%s: %d slot%s, %d drive%s, %d picker%s, %d portal%s\n",
device_xname(sc->sc_dev),
sc->sc_counts[CHET_ST], PLURAL(sc->sc_counts[CHET_ST]),
sc->sc_counts[CHET_DT], PLURAL(sc->sc_counts[CHET_DT]),
sc->sc_counts[CHET_MT], PLURAL(sc->sc_counts[CHET_MT]),
sc->sc_counts[CHET_IE], PLURAL(sc->sc_counts[CHET_IE]));
#undef PLURAL
#ifdef CHANGER_DEBUG
printf("%s: move mask: 0x%x 0x%x 0x%x 0x%x\n",
device_xname(sc->sc_dev),
sc->sc_movemask[CHET_MT], sc->sc_movemask[CHET_ST],
sc->sc_movemask[CHET_IE], sc->sc_movemask[CHET_DT]);
printf("%s: exchange mask: 0x%x 0x%x 0x%x 0x%x\n",
device_xname(sc->sc_dev),
sc->sc_exchangemask[CHET_MT], sc->sc_exchangemask[CHET_ST],
sc->sc_exchangemask[CHET_IE], sc->sc_exchangemask[CHET_DT]);
#endif /* CHANGER_DEBUG */
}
/* Default the current picker. */
sc->sc_picker = sc->sc_firsts[CHET_MT];
}
int
chopen(dev_t dev, int flags, int fmt, struct proc *p)
{
struct ch_softc *sc;
int oldcounts[4];
int i, unit, error = 0;
unit = CHUNIT(dev);
if ((unit >= ch_cd.cd_ndevs) ||
((sc = ch_cd.cd_devs[unit]) == NULL))
return (ENXIO);
/*
* Only allow one open at a time.
*/
if (sc->sc_link->flags & SDEV_OPEN)
return (EBUSY);
sc->sc_link->flags |= SDEV_OPEN;
/*
* Absorb any unit attention errors. We must notice
* "Not ready" errors as a changer will report "In the
* process of getting ready" any time it must rescan
* itself to determine the state of the changer.
*/
error = scsi_test_unit_ready(sc->sc_link, TEST_READY_RETRIES,
SCSI_IGNORE_ILLEGAL_REQUEST | SCSI_IGNORE_MEDIA_CHANGE);
if (error)
goto bad;
/*
* Get information about the device. Save old information
* so we can decide whether to be verbose about new parameters.
*/
for (i = 0; i < 4; i++) {
oldcounts[i] = sc->sc_counts[i];
}
error = ch_get_params(sc, scsi_autoconf);
if (error)
goto bad;
for (i = 0; i < 4; i++) {
if (oldcounts[i] != sc->sc_counts[i]) {
break;
}
}
if (i < 4) {
#ifdef CHANGER_DEBUG
#define PLURAL(c) (c) == 1 ? "" : "s"
printf("%s: %d slot%s, %d drive%s, %d picker%s, %d portal%s\n",
sc->sc_dev.dv_xname,
sc->sc_counts[CHET_ST], PLURAL(sc->sc_counts[CHET_ST]),
sc->sc_counts[CHET_DT], PLURAL(sc->sc_counts[CHET_DT]),
sc->sc_counts[CHET_MT], PLURAL(sc->sc_counts[CHET_MT]),
sc->sc_counts[CHET_IE], PLURAL(sc->sc_counts[CHET_IE]));
#undef PLURAL
printf("%s: move mask: 0x%x 0x%x 0x%x 0x%x\n",
sc->sc_dev.dv_xname,
sc->sc_movemask[CHET_MT], sc->sc_movemask[CHET_ST],
sc->sc_movemask[CHET_IE], sc->sc_movemask[CHET_DT]);
printf("%s: exchange mask: 0x%x 0x%x 0x%x 0x%x\n",
sc->sc_dev.dv_xname,
sc->sc_exchangemask[CHET_MT], sc->sc_exchangemask[CHET_ST],
sc->sc_exchangemask[CHET_IE], sc->sc_exchangemask[CHET_DT]);
#endif /* CHANGER_DEBUG */
}
/* Default the current picker. */
sc->sc_picker = sc->sc_firsts[CHET_MT];
return (0);
bad:
sc->sc_link->flags &= ~SDEV_OPEN;
return (error);
}
