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scsi-disk: support READ DVD STRUCTURE

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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Paolo Bonzini 2011-09-13 15:57:15 +02:00 committed by Kevin Wolf
parent 430ee2f26f
commit ceb792ef29
1 changed files with 101 additions and 1 deletions
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102
hw/scsi-disk.c
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@ -580,10 +580,110 @@ static inline bool media_is_dvd(SCSIDiskState *s)
return nb_sectors > CD_MAX_SECTORS;
}
static inline bool media_is_cd(SCSIDiskState *s)
{
uint64_t nb_sectors;
if (s->qdev.type != TYPE_ROM) {
return false;
}
if (!bdrv_is_inserted(s->bs)) {
return false;
}
bdrv_get_geometry(s->bs, &nb_sectors);
return nb_sectors <= CD_MAX_SECTORS;
}
static int scsi_read_dvd_structure(SCSIDiskState *s, SCSIDiskReq *r,
uint8_t *outbuf)
{
scsi_check_condition(r, SENSE_CODE(INVALID_OPCODE));
static const int rds_caps_size[5] = {
[0] = 2048 + 4,
[1] = 4 + 4,
[3] = 188 + 4,
[4] = 2048 + 4,
};
uint8_t media = r->req.cmd.buf[1];
uint8_t layer = r->req.cmd.buf[6];
uint8_t format = r->req.cmd.buf[7];
int size = -1;
if (s->qdev.type != TYPE_ROM) {
return -1;
}
if (media != 0) {
scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
return -1;
}
if (format != 0xff) {
if (s->tray_open || !bdrv_is_inserted(s->bs)) {
scsi_check_condition(r, SENSE_CODE(NO_MEDIUM));
return -1;
}
if (media_is_cd(s)) {
scsi_check_condition(r, SENSE_CODE(INCOMPATIBLE_FORMAT));
return -1;
}
if (format >= ARRAY_SIZE(rds_caps_size)) {
return -1;
}
size = rds_caps_size[format];
memset(outbuf, 0, size);
}
switch (format) {
case 0x00: {
/* Physical format information */
uint64_t nb_sectors;
if (layer != 0) {
goto fail;
}
bdrv_get_geometry(s->bs, &nb_sectors);
outbuf[4] = 1; /* DVD-ROM, part version 1 */
outbuf[5] = 0xf; /* 120mm disc, minimum rate unspecified */
outbuf[6] = 1; /* one layer, read-only (per MMC-2 spec) */
outbuf[7] = 0; /* default densities */
stl_be_p(&outbuf[12], (nb_sectors >> 2) - 1); /* end sector */
stl_be_p(&outbuf[16], (nb_sectors >> 2) - 1); /* l0 end sector */
break;
}
case 0x01: /* DVD copyright information, all zeros */
break;
case 0x03: /* BCA information - invalid field for no BCA info */
return -1;
case 0x04: /* DVD disc manufacturing information, all zeros */
break;
case 0xff: { /* List capabilities */
int i;
size = 4;
for (i = 0; i < ARRAY_SIZE(rds_caps_size); i++) {
if (!rds_caps_size[i]) {
continue;
}
outbuf[size] = i;
outbuf[size + 1] = 0x40; /* Not writable, readable */
stw_be_p(&outbuf[size + 2], rds_caps_size[i]);
size += 4;
}
break;
}
default:
return -1;
}
/* Size of buffer, not including 2 byte size field */
stw_be_p(outbuf, size - 2);
return size;
fail:
return -1;
}