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ide/atapi: Introduce CHECK_READY flag for commands

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Some commands are supposed to report a Not Ready Condition (i.e. they require
a medium to be present in order to execute successfully). Instead of
duplicating the check in each command implementation, let's add a flag and
check it before calling the command.

This patch only converts existing checks, it does not introduce new checks for
any of the other commands that can/should report a Not Ready Condition.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2011-04-19 13:15:52 +02:00
parent e119bcaceb
commit 7a2c4b8234
1 changed files with 23 additions and 25 deletions
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48
hw/ide/atapi.c
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@ -813,11 +813,9 @@ error_cmd:
static void cmd_test_unit_ready(IDEState *s, uint8_t *buf) static void cmd_test_unit_ready(IDEState *s, uint8_t *buf)
{ {
if (bdrv_is_inserted(s->bs)) { /* Not Ready Conditions are already handled in ide_atapi_cmd(), so if we
ide_atapi_cmd_ok(s); * come here, we know that it's ready. */
} else { ide_atapi_cmd_ok(s);
ide_atapi_cmd_error(s, SENSE_NOT_READY, ASC_MEDIUM_NOT_PRESENT);
}
} }
static void cmd_prevent_allow_medium_removal(IDEState *s, uint8_t* buf) static void cmd_prevent_allow_medium_removal(IDEState *s, uint8_t* buf)
@ -883,11 +881,6 @@ static void cmd_seek(IDEState *s, uint8_t* buf)
unsigned int lba; unsigned int lba;
uint64_t total_sectors = s->nb_sectors >> 2; uint64_t total_sectors = s->nb_sectors >> 2;
if (total_sectors == 0) {
ide_atapi_cmd_error(s, SENSE_NOT_READY, ASC_MEDIUM_NOT_PRESENT);
return;
}
lba = ube32_to_cpu(buf + 2); lba = ube32_to_cpu(buf + 2);
if (lba >= total_sectors) { if (lba >= total_sectors) {
ide_atapi_cmd_error(s, SENSE_ILLEGAL_REQUEST, ASC_LOGICAL_BLOCK_OOR); ide_atapi_cmd_error(s, SENSE_ILLEGAL_REQUEST, ASC_LOGICAL_BLOCK_OOR);
@ -941,13 +934,8 @@ static void cmd_mechanism_status(IDEState *s, uint8_t* buf)
static void cmd_read_toc_pma_atip(IDEState *s, uint8_t* buf) static void cmd_read_toc_pma_atip(IDEState *s, uint8_t* buf)
{ {
int format, msf, start_track, len; int format, msf, start_track, len;
uint64_t total_sectors = s->nb_sectors >> 2;
int max_len; int max_len;
uint64_t total_sectors = s->nb_sectors >> 2;
if (total_sectors == 0) {
ide_atapi_cmd_error(s, SENSE_NOT_READY, ASC_MEDIUM_NOT_PRESENT);
return;
}
max_len = ube16_to_cpu(buf + 7); max_len = ube16_to_cpu(buf + 7);
format = buf[9] >> 6; format = buf[9] >> 6;
@ -986,11 +974,6 @@ static void cmd_read_cdvd_capacity(IDEState *s, uint8_t* buf)
{ {
uint64_t total_sectors = s->nb_sectors >> 2; uint64_t total_sectors = s->nb_sectors >> 2;
if (total_sectors == 0) {
ide_atapi_cmd_error(s, SENSE_NOT_READY, ASC_MEDIUM_NOT_PRESENT);
return;
}
/* NOTE: it is really the number of sectors minus 1 */ /* NOTE: it is really the number of sectors minus 1 */
cpu_to_ube32(buf, total_sectors - 1); cpu_to_ube32(buf, total_sectors - 1);
cpu_to_ube32(buf + 4, 2048); cpu_to_ube32(buf + 4, 2048);
@ -1062,22 +1045,29 @@ enum {
* unit attention condition. (See MMC-5, section 4.1.6.1) * unit attention condition. (See MMC-5, section 4.1.6.1)
*/ */
ALLOW_UA = 0x01, ALLOW_UA = 0x01,
/*
* Commands flagged with CHECK_READY can only execute if a medium is present.
* Otherwise they report the Not Ready Condition. (See MMC-5, section
* 4.1.8)
*/
CHECK_READY = 0x02,
}; };
static const struct { static const struct {
void (*handler)(IDEState *s, uint8_t *buf); void (*handler)(IDEState *s, uint8_t *buf);
int flags; int flags;
} atapi_cmd_table[0x100] = { } atapi_cmd_table[0x100] = {
[ 0x00 ] = { cmd_test_unit_ready, 0 }, [ 0x00 ] = { cmd_test_unit_ready, CHECK_READY },
[ 0x03 ] = { cmd_request_sense, ALLOW_UA }, [ 0x03 ] = { cmd_request_sense, ALLOW_UA },
[ 0x12 ] = { cmd_inquiry, ALLOW_UA }, [ 0x12 ] = { cmd_inquiry, ALLOW_UA },
[ 0x1a ] = { cmd_mode_sense, /* (6) */ 0 }, [ 0x1a ] = { cmd_mode_sense, /* (6) */ 0 },
[ 0x1b ] = { cmd_start_stop_unit, 0 }, [ 0x1b ] = { cmd_start_stop_unit, 0 },
[ 0x1e ] = { cmd_prevent_allow_medium_removal, 0 }, [ 0x1e ] = { cmd_prevent_allow_medium_removal, 0 },
[ 0x25 ] = { cmd_read_cdvd_capacity, 0 }, [ 0x25 ] = { cmd_read_cdvd_capacity, CHECK_READY },
[ 0x28 ] = { cmd_read, /* (10) */ 0 }, [ 0x28 ] = { cmd_read, /* (10) */ 0 },
[ 0x2b ] = { cmd_seek, 0 }, [ 0x2b ] = { cmd_seek, CHECK_READY },
[ 0x43 ] = { cmd_read_toc_pma_atip, 0 }, [ 0x43 ] = { cmd_read_toc_pma_atip, CHECK_READY },
[ 0x46 ] = { cmd_get_configuration, ALLOW_UA }, [ 0x46 ] = { cmd_get_configuration, ALLOW_UA },
[ 0x4a ] = { cmd_get_event_status_notification, ALLOW_UA }, [ 0x4a ] = { cmd_get_event_status_notification, ALLOW_UA },
[ 0x5a ] = { cmd_mode_sense, /* (10) */ 0 }, [ 0x5a ] = { cmd_mode_sense, /* (10) */ 0 },
@ -1126,6 +1116,14 @@ void ide_atapi_cmd(IDEState *s)
return; return;
} }
/* Report a Not Ready condition if appropriate for the command */
if ((atapi_cmd_table[s->io_buffer[0]].flags & CHECK_READY) &&
(!media_present(s) || !bdrv_is_inserted(s->bs)))
{
ide_atapi_cmd_error(s, SENSE_NOT_READY, ASC_MEDIUM_NOT_PRESENT);
return;
}
/* Execute the command */ /* Execute the command */
if (atapi_cmd_table[s->io_buffer[0]].handler) { if (atapi_cmd_table[s->io_buffer[0]].handler) {
atapi_cmd_table[s->io_buffer[0]].handler(s, buf); atapi_cmd_table[s->io_buffer[0]].handler(s, buf);