diff options
Diffstat (limited to 'hw/ide')
| -rw-r--r-- | hw/ide/atapi.c | 32 | ||||
| -rw-r--r-- | hw/ide/core.c | 2 | ||||
| -rw-r--r-- | hw/ide/internal.h | 1 |
3 files changed, 29 insertions, 6 deletions
diff --git a/hw/ide/atapi.c b/hw/ide/atapi.c index 79dd167..747f466 100644 --- a/hw/ide/atapi.c +++ b/hw/ide/atapi.c @@ -1169,20 +1169,28 @@ enum { * 4.1.8) */ CHECK_READY = 0x02, + + /* + * Commands flagged with NONDATA do not in any circumstances return + * any data via ide_atapi_cmd_reply. These commands are exempt from + * the normal byte_count_limit constraints. + * See ATA8-ACS3 "7.21.5 Byte Count Limit" + */ + NONDATA = 0x04, }; static const struct { void (*handler)(IDEState *s, uint8_t *buf); int flags; } atapi_cmd_table[0x100] = { - [ 0x00 ] = { cmd_test_unit_ready, CHECK_READY }, + [ 0x00 ] = { cmd_test_unit_ready, CHECK_READY | NONDATA }, [ 0x03 ] = { cmd_request_sense, ALLOW_UA }, [ 0x12 ] = { cmd_inquiry, ALLOW_UA }, - [ 0x1b ] = { cmd_start_stop_unit, 0 }, /* [1] */ - [ 0x1e ] = { cmd_prevent_allow_medium_removal, 0 }, + [ 0x1b ] = { cmd_start_stop_unit, NONDATA }, /* [1] */ + [ 0x1e ] = { cmd_prevent_allow_medium_removal, NONDATA }, [ 0x25 ] = { cmd_read_cdvd_capacity, CHECK_READY }, [ 0x28 ] = { cmd_read, /* (10) */ CHECK_READY }, - [ 0x2b ] = { cmd_seek, CHECK_READY }, + [ 0x2b ] = { cmd_seek, CHECK_READY | NONDATA }, [ 0x43 ] = { cmd_read_toc_pma_atip, CHECK_READY }, [ 0x46 ] = { cmd_get_configuration, ALLOW_UA }, [ 0x4a ] = { cmd_get_event_status_notification, ALLOW_UA }, @@ -1190,7 +1198,7 @@ static const struct { [ 0x5a ] = { cmd_mode_sense, /* (10) */ 0 }, [ 0xa8 ] = { cmd_read, /* (12) */ CHECK_READY }, [ 0xad ] = { cmd_read_dvd_structure, CHECK_READY }, - [ 0xbb ] = { cmd_set_speed, 0 }, + [ 0xbb ] = { cmd_set_speed, NONDATA }, [ 0xbd ] = { cmd_mechanism_status, 0 }, [ 0xbe ] = { cmd_read_cd, CHECK_READY }, /* [1] handler detects and reports not ready condition itself */ @@ -1251,6 +1259,20 @@ void ide_atapi_cmd(IDEState *s) return; } + /* Nondata commands permit the byte_count_limit to be 0. + * If this is a data-transferring PIO command and BCL is 0, + * we abort at the /ATA/ level, not the ATAPI level. + * See ATA8 ACS3 section 7.17.6.49 and 7.21.5 */ + if (!(atapi_cmd_table[s->io_buffer[0]].flags & NONDATA)) { + /* TODO: Check IDENTIFY data word 125 for default BCL (currently 0) */ + uint16_t byte_count_limit = s->lcyl | (s->hcyl << 8); + if (!(byte_count_limit || s->atapi_dma)) { + /* TODO: Move abort back into core.c and make static inline again */ + ide_abort_command(s); + return; + } + } + /* Execute the command */ if (atapi_cmd_table[s->io_buffer[0]].handler) { atapi_cmd_table[s->io_buffer[0]].handler(s, buf); diff --git a/hw/ide/core.c b/hw/ide/core.c index 1cc6945..317406d 100644 --- a/hw/ide/core.c +++ b/hw/ide/core.c @@ -457,7 +457,7 @@ BlockAIOCB *ide_issue_trim(BlockBackend *blk, return &iocb->common; } -static inline void ide_abort_command(IDEState *s) +void ide_abort_command(IDEState *s) { ide_transfer_stop(s); s->status = READY_STAT | ERR_STAT; diff --git a/hw/ide/internal.h b/hw/ide/internal.h index 7288a67..05e93ff 100644 --- a/hw/ide/internal.h +++ b/hw/ide/internal.h @@ -538,6 +538,7 @@ void ide_set_sector(IDEState *s, int64_t sector_num); void ide_start_dma(IDEState *s, BlockCompletionFunc *cb); void dma_buf_commit(IDEState *s, uint32_t tx_bytes); void ide_dma_error(IDEState *s); +void ide_abort_command(IDEState *s); void ide_atapi_cmd_ok(IDEState *s); void ide_atapi_cmd_error(IDEState *s, int sense_key, int asc); |