/*
* Get the scsi driver to send a full inquiry to the
* device and use the results to fill out the global
* parameter structure.
*
* called from:
* attach
* open
* ioctl (to reset original blksize)
*/
static int
st_scsibus_mode_sense(struct st_softc *st, int flags)
{
u_int scsipi_sense_len;
int error;
struct scsipi_sense {
struct scsi_mode_parameter_header_6 header;
struct scsi_general_block_descriptor blk_desc;
u_char sense_data[MAX_PAGE_0_SIZE];
} scsipi_sense;
struct scsipi_periph *periph = st->sc_periph;
scsipi_sense_len = sizeof(scsipi_sense.header) +
sizeof(scsipi_sense.blk_desc) +
st->page_0_size;
/*
* Set up a mode sense
* We don't need the results. Just print them for our interest's sake,
* if asked, or if we need it as a template for the mode select store
* it away.
*/
error = scsipi_mode_sense(st->sc_periph, 0, SMS_PCTRL_CURRENT,
&scsipi_sense.header, scsipi_sense_len, flags,
ST_RETRIES, ST_CTL_TIME);
if (error)
return error;
st->numblks = _3btol(scsipi_sense.blk_desc.nblocks);
st->media_blksize = _3btol(scsipi_sense.blk_desc.blklen);
st->media_density = scsipi_sense.blk_desc.density;
if (scsipi_sense.header.dev_spec & SMH_DSP_WRITE_PROT)
st->flags |= ST_READONLY;
else
st->flags &= ~ST_READONLY;
SC_DEBUG(periph, SCSIPI_DB3,
("density code %d, %d-byte blocks, write-%s, ",
st->media_density, st->media_blksize,
st->flags & ST_READONLY ? "protected" : "enabled"));
SC_DEBUG(periph, SCSIPI_DB3,
("%sbuffered\n",
scsipi_sense.header.dev_spec & SMH_DSP_BUFF_MODE ? "" : "un"));
if (st->page_0_size)
memcpy(st->sense_data, scsipi_sense.sense_data,
st->page_0_size);
periph->periph_flags |= PERIPH_MEDIA_LOADED;
return 0;
}
static int
st_scsibus_cmprss(struct st_softc *st, int flags, int onoff)
{
u_int scsi_dlen;
int byte2, page;
struct scsi_select {
struct scsi_mode_parameter_header_6 header;
struct scsi_general_block_descriptor blk_desc;
u_char pdata[MAX(sizeof(struct scsi_tape_dev_conf_page),
sizeof(struct scsi_tape_dev_compression_page))];
} scsi_pdata;
struct scsi_tape_dev_conf_page *ptr;
struct scsi_tape_dev_compression_page *cptr;
struct scsipi_periph *periph = st->sc_periph;
int error, ison;
scsi_dlen = sizeof(scsi_pdata);
/*
* Do DATA COMPRESSION page first.
*/
page = SMS_PCTRL_CURRENT | 0xf;
byte2 = 0;
/*
* Do the MODE SENSE command...
*/
again:
memset(&scsi_pdata, 0, scsi_dlen);
error = scsipi_mode_sense(periph, byte2, page,
&scsi_pdata.header, scsi_dlen, flags | XS_CTL_DATA_ONSTACK,
ST_RETRIES, ST_CTL_TIME);
if (error) {
if (byte2 != SMS_DBD) {
byte2 = SMS_DBD;
goto again;
}
/*
* Try a different page?
*/
if (page == (SMS_PCTRL_CURRENT | 0xf)) {
page = SMS_PCTRL_CURRENT | 0x10;
byte2 = 0;
goto again;
}
return (error);
}
if (scsi_pdata.header.blk_desc_len)
ptr = (struct scsi_tape_dev_conf_page *) scsi_pdata.pdata;
else
ptr = (struct scsi_tape_dev_conf_page *) &scsi_pdata.blk_desc;
if ((page & SMS_PAGE_MASK) == 0xf) {
cptr = (struct scsi_tape_dev_compression_page *) ptr;
ison = (cptr->dce_dcc & DCP_DCE) != 0;
if (onoff)
cptr->dce_dcc |= DCP_DCE;
else
cptr->dce_dcc &= ~DCP_DCE;
cptr->pagecode &= ~0x80;
} else {
ison = (ptr->sel_comp_alg != 0);
if (onoff)
ptr->sel_comp_alg = 1;
else
ptr->sel_comp_alg = 0;
ptr->pagecode &= ~0x80;
ptr->byte2 = 0;
ptr->active_partition = 0;
ptr->wb_full_ratio = 0;
ptr->rb_empty_ratio = 0;
ptr->byte8 &= ~0x30;
ptr->gap_size = 0;
ptr->byte10 &= ~0xe7;
ptr->ew_bufsize[0] = 0;
ptr->ew_bufsize[1] = 0;
ptr->ew_bufsize[2] = 0;
ptr->reserved = 0;
}
/*
* There might be a virtue in actually doing the MODE SELECTS,
* but let's not clog the bus over it.
*/
if (onoff == ison)
return (0);
/*
* Set up for a mode select
*/
scsi_pdata.header.data_length = 0;
scsi_pdata.header.medium_type = 0;
if ((st->flags & ST_DONTBUFFER) == 0)
scsi_pdata.header.dev_spec = SMH_DSP_BUFF_MODE_ON;
else
scsi_pdata.header.dev_spec = 0;
if (scsi_pdata.header.blk_desc_len) {
scsi_pdata.blk_desc.density = 0;
scsi_pdata.blk_desc.nblocks[0] = 0;
scsi_pdata.blk_desc.nblocks[1] = 0;
scsi_pdata.blk_desc.nblocks[2] = 0;
}
/*
* Do the command
*/
error = scsipi_mode_select(periph, SMS_PF, &scsi_pdata.header,
scsi_dlen, flags | XS_CTL_DATA_ONSTACK, ST_RETRIES, ST_CTL_TIME);
if (error && (page & SMS_PAGE_MASK) == 0xf) {
/*
* Try DEVICE CONFIGURATION page.
*/
page = SMS_PCTRL_CURRENT | 0x10;
goto again;
}
return (error);
}
/*
* Ask the device about itself and fill in the parameters in our
* softc.
*/
static int
ch_get_params(struct ch_softc *sc, int scsiflags)
{
struct scsi_mode_sense_data {
struct scsi_mode_parameter_header_6 header;
union {
struct page_element_address_assignment ea;
struct page_transport_geometry_parameters tg;
struct page_device_capabilities cap;
} pages;
} sense_data;
int error, from;
u_int8_t *moves, *exchanges;
/*
* Grab info from the element address assignment page.
*/
memset(&sense_data, 0, sizeof(sense_data));
error = scsipi_mode_sense(sc->sc_periph, SMS_DBD, 0x1d,
&sense_data.header, sizeof(sense_data),
scsiflags, CHRETRIES, 6000);
if (error) {
aprint_error_dev(sc->sc_dev, "could not sense element address page\n");
return (error);
}
sc->sc_firsts[CHET_MT] = _2btol(sense_data.pages.ea.mtea);
sc->sc_counts[CHET_MT] = _2btol(sense_data.pages.ea.nmte);
sc->sc_firsts[CHET_ST] = _2btol(sense_data.pages.ea.fsea);
sc->sc_counts[CHET_ST] = _2btol(sense_data.pages.ea.nse);
sc->sc_firsts[CHET_IE] = _2btol(sense_data.pages.ea.fieea);
sc->sc_counts[CHET_IE] = _2btol(sense_data.pages.ea.niee);
sc->sc_firsts[CHET_DT] = _2btol(sense_data.pages.ea.fdtea);
sc->sc_counts[CHET_DT] = _2btol(sense_data.pages.ea.ndte);
/* XXX ask for transport geometry page XXX */
/*
* Grab info from the capabilities page.
*/
memset(&sense_data, 0, sizeof(sense_data));
/*
* XXX: Note: not all changers can deal with disabled block descriptors
*/
error = scsipi_mode_sense(sc->sc_periph, SMS_DBD, 0x1f,
&sense_data.header, sizeof(sense_data),
scsiflags, CHRETRIES, 6000);
if (error) {
aprint_error_dev(sc->sc_dev, "could not sense capabilities page\n");
return (error);
}
memset(sc->sc_movemask, 0, sizeof(sc->sc_movemask));
memset(sc->sc_exchangemask, 0, sizeof(sc->sc_exchangemask));
moves = &sense_data.pages.cap.move_from_mt;
exchanges = &sense_data.pages.cap.exchange_with_mt;
for (from = CHET_MT; from <= CHET_DT; ++from) {
sc->sc_movemask[from] = moves[from];
sc->sc_exchangemask[from] = exchanges[from];
}
#ifdef CH_AUTOMATIC_IELEM_POLICY
/*
* If we need to do an Init-Element-Status,
* do that now that we know what's in the changer.
*/
if ((scsiflags & XS_CTL_IGNORE_MEDIA_CHANGE) == 0) {
if ((sc->sc_periph->periph_flags & PERIPH_MEDIA_LOADED) == 0)
error = ch_ielem(sc);
if (error == 0)
sc->sc_periph->periph_flags |= PERIPH_MEDIA_LOADED;
else
sc->sc_periph->periph_flags &= ~PERIPH_MEDIA_LOADED;
}
#endif
return (error);
}