diff options
Diffstat (limited to 'src/hw/ide/atapi.c')
| -rw-r--r-- | src/hw/ide/atapi.c | 1369 |
1 files changed, 1369 insertions, 0 deletions
diff --git a/src/hw/ide/atapi.c b/src/hw/ide/atapi.c new file mode 100644 index 0000000..65f8dd4 --- /dev/null +++ b/src/hw/ide/atapi.c @@ -0,0 +1,1369 @@ +/* + * QEMU ATAPI Emulation + * + * Copyright (c) 2003 Fabrice Bellard + * Copyright (c) 2006 Openedhand Ltd. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include "hw/ide/internal.h" +#include "hw/scsi/scsi.h" +#include "sysemu/block-backend.h" + +static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret); + +static void padstr8(uint8_t *buf, int buf_size, const char *src) +{ + int i; + for(i = 0; i < buf_size; i++) { + if (*src) + buf[i] = *src++; + else + buf[i] = ' '; + } +} + +static inline void cpu_to_ube16(uint8_t *buf, int val) +{ + buf[0] = val >> 8; + buf[1] = val & 0xff; +} + +static inline void cpu_to_ube32(uint8_t *buf, unsigned int val) +{ + buf[0] = val >> 24; + buf[1] = val >> 16; + buf[2] = val >> 8; + buf[3] = val & 0xff; +} + +static inline int ube16_to_cpu(const uint8_t *buf) +{ + return (buf[0] << 8) | buf[1]; +} + +static inline int ube32_to_cpu(const uint8_t *buf) +{ + return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]; +} + +static void lba_to_msf(uint8_t *buf, int lba) +{ + lba += 150; + buf[0] = (lba / 75) / 60; + buf[1] = (lba / 75) % 60; + buf[2] = lba % 75; +} + +static inline int media_present(IDEState *s) +{ + return !s->tray_open && s->nb_sectors > 0; +} + +/* XXX: DVDs that could fit on a CD will be reported as a CD */ +static inline int media_is_dvd(IDEState *s) +{ + return (media_present(s) && s->nb_sectors > CD_MAX_SECTORS); +} + +static inline int media_is_cd(IDEState *s) +{ + return (media_present(s) && s->nb_sectors <= CD_MAX_SECTORS); +} + +static void cd_data_to_raw(uint8_t *buf, int lba) +{ + /* sync bytes */ + buf[0] = 0x00; + memset(buf + 1, 0xff, 10); + buf[11] = 0x00; + buf += 12; + /* MSF */ + lba_to_msf(buf, lba); + buf[3] = 0x01; /* mode 1 data */ + buf += 4; + /* data */ + buf += 2048; + /* XXX: ECC not computed */ + memset(buf, 0, 288); +} + +static int +cd_read_sector_sync(IDEState *s) +{ + int ret; + block_acct_start(blk_get_stats(s->blk), &s->acct, + 4 * BDRV_SECTOR_SIZE, BLOCK_ACCT_READ); + +#ifdef DEBUG_IDE_ATAPI + printf("cd_read_sector_sync: lba=%d\n", s->lba); +#endif + + switch (s->cd_sector_size) { + case 2048: + ret = blk_read(s->blk, (int64_t)s->lba << 2, + s->io_buffer, 4); + break; + case 2352: + ret = blk_read(s->blk, (int64_t)s->lba << 2, + s->io_buffer + 16, 4); + if (ret >= 0) { + cd_data_to_raw(s->io_buffer, s->lba); + } + break; + default: + block_acct_invalid(blk_get_stats(s->blk), BLOCK_ACCT_READ); + return -EIO; + } + + if (ret < 0) { + block_acct_failed(blk_get_stats(s->blk), &s->acct); + } else { + block_acct_done(blk_get_stats(s->blk), &s->acct); + s->lba++; + s->io_buffer_index = 0; + } + + return ret; +} + +static void cd_read_sector_cb(void *opaque, int ret) +{ + IDEState *s = opaque; + +#ifdef DEBUG_IDE_ATAPI + printf("cd_read_sector_cb: lba=%d ret=%d\n", s->lba, ret); +#endif + + if (ret < 0) { + block_acct_failed(blk_get_stats(s->blk), &s->acct); + ide_atapi_io_error(s, ret); + return; + } + + block_acct_done(blk_get_stats(s->blk), &s->acct); + + if (s->cd_sector_size == 2352) { + cd_data_to_raw(s->io_buffer, s->lba); + } + + s->lba++; + s->io_buffer_index = 0; + s->status &= ~BUSY_STAT; + + ide_atapi_cmd_reply_end(s); +} + +static int cd_read_sector(IDEState *s) +{ + if (s->cd_sector_size != 2048 && s->cd_sector_size != 2352) { + block_acct_invalid(blk_get_stats(s->blk), BLOCK_ACCT_READ); + return -EINVAL; + } + + s->iov.iov_base = (s->cd_sector_size == 2352) ? + s->io_buffer + 16 : s->io_buffer; + + s->iov.iov_len = 4 * BDRV_SECTOR_SIZE; + qemu_iovec_init_external(&s->qiov, &s->iov, 1); + +#ifdef DEBUG_IDE_ATAPI + printf("cd_read_sector: lba=%d\n", s->lba); +#endif + + block_acct_start(blk_get_stats(s->blk), &s->acct, + 4 * BDRV_SECTOR_SIZE, BLOCK_ACCT_READ); + + ide_buffered_readv(s, (int64_t)s->lba << 2, &s->qiov, 4, + cd_read_sector_cb, s); + + s->status |= BUSY_STAT; + return 0; +} + +void ide_atapi_cmd_ok(IDEState *s) +{ + s->error = 0; + s->status = READY_STAT | SEEK_STAT; + s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; + ide_transfer_stop(s); + ide_set_irq(s->bus); +} + +void ide_atapi_cmd_error(IDEState *s, int sense_key, int asc) +{ +#ifdef DEBUG_IDE_ATAPI + printf("atapi_cmd_error: sense=0x%x asc=0x%x\n", sense_key, asc); +#endif + s->error = sense_key << 4; + s->status = READY_STAT | ERR_STAT; + s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; + s->sense_key = sense_key; + s->asc = asc; + ide_transfer_stop(s); + ide_set_irq(s->bus); +} + +void ide_atapi_io_error(IDEState *s, int ret) +{ + /* XXX: handle more errors */ + if (ret == -ENOMEDIUM) { + ide_atapi_cmd_error(s, NOT_READY, + ASC_MEDIUM_NOT_PRESENT); + } else { + ide_atapi_cmd_error(s, ILLEGAL_REQUEST, + ASC_LOGICAL_BLOCK_OOR); + } +} + +static uint16_t atapi_byte_count_limit(IDEState *s) +{ + uint16_t bcl; + + bcl = s->lcyl | (s->hcyl << 8); + if (bcl == 0xffff) { + return 0xfffe; + } + return bcl; +} + +/* The whole ATAPI transfer logic is handled in this function */ +void ide_atapi_cmd_reply_end(IDEState *s) +{ + int byte_count_limit, size, ret; +#ifdef DEBUG_IDE_ATAPI + printf("reply: tx_size=%d elem_tx_size=%d index=%d\n", + s->packet_transfer_size, + s->elementary_transfer_size, + s->io_buffer_index); +#endif + if (s->packet_transfer_size <= 0) { + /* end of transfer */ + ide_atapi_cmd_ok(s); + ide_set_irq(s->bus); +#ifdef DEBUG_IDE_ATAPI + printf("end of transfer, status=0x%x\n", s->status); +#endif + } else { + /* see if a new sector must be read */ + if (s->lba != -1 && s->io_buffer_index >= s->cd_sector_size) { + if (!s->elementary_transfer_size) { + ret = cd_read_sector(s); + if (ret < 0) { + ide_atapi_io_error(s, ret); + } + return; + } else { + /* rebuffering within an elementary transfer is + * only possible with a sync request because we + * end up with a race condition otherwise */ + ret = cd_read_sector_sync(s); + if (ret < 0) { + ide_atapi_io_error(s, ret); + return; + } + } + } + if (s->elementary_transfer_size > 0) { + /* there are some data left to transmit in this elementary + transfer */ + size = s->cd_sector_size - s->io_buffer_index; + if (size > s->elementary_transfer_size) + size = s->elementary_transfer_size; + s->packet_transfer_size -= size; + s->elementary_transfer_size -= size; + s->io_buffer_index += size; + ide_transfer_start(s, s->io_buffer + s->io_buffer_index - size, + size, ide_atapi_cmd_reply_end); + } else { + /* a new transfer is needed */ + s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO; + byte_count_limit = atapi_byte_count_limit(s); +#ifdef DEBUG_IDE_ATAPI + printf("byte_count_limit=%d\n", byte_count_limit); +#endif + size = s->packet_transfer_size; + if (size > byte_count_limit) { + /* byte count limit must be even if this case */ + if (byte_count_limit & 1) + byte_count_limit--; + size = byte_count_limit; + } + s->lcyl = size; + s->hcyl = size >> 8; + s->elementary_transfer_size = size; + /* we cannot transmit more than one sector at a time */ + if (s->lba != -1) { + if (size > (s->cd_sector_size - s->io_buffer_index)) + size = (s->cd_sector_size - s->io_buffer_index); + } + s->packet_transfer_size -= size; + s->elementary_transfer_size -= size; + s->io_buffer_index += size; + ide_transfer_start(s, s->io_buffer + s->io_buffer_index - size, + size, ide_atapi_cmd_reply_end); + ide_set_irq(s->bus); +#ifdef DEBUG_IDE_ATAPI + printf("status=0x%x\n", s->status); +#endif + } + } +} + +/* send a reply of 'size' bytes in s->io_buffer to an ATAPI command */ +static void ide_atapi_cmd_reply(IDEState *s, int size, int max_size) +{ + if (size > max_size) + size = max_size; + s->lba = -1; /* no sector read */ + s->packet_transfer_size = size; + s->io_buffer_size = size; /* dma: send the reply data as one chunk */ + s->elementary_transfer_size = 0; + + if (s->atapi_dma) { + block_acct_start(blk_get_stats(s->blk), &s->acct, size, + BLOCK_ACCT_READ); + s->status = READY_STAT | SEEK_STAT | DRQ_STAT; + ide_start_dma(s, ide_atapi_cmd_read_dma_cb); + } else { + s->status = READY_STAT | SEEK_STAT; + s->io_buffer_index = 0; + ide_atapi_cmd_reply_end(s); + } +} + +/* start a CD-CDROM read command */ +static void ide_atapi_cmd_read_pio(IDEState *s, int lba, int nb_sectors, + int sector_size) +{ + s->lba = lba; + s->packet_transfer_size = nb_sectors * sector_size; + s->elementary_transfer_size = 0; + s->io_buffer_index = sector_size; + s->cd_sector_size = sector_size; + + ide_atapi_cmd_reply_end(s); +} + +static void ide_atapi_cmd_check_status(IDEState *s) +{ +#ifdef DEBUG_IDE_ATAPI + printf("atapi_cmd_check_status\n"); +#endif + s->error = MC_ERR | (UNIT_ATTENTION << 4); + s->status = ERR_STAT; + s->nsector = 0; + ide_set_irq(s->bus); +} +/* ATAPI DMA support */ + +/* XXX: handle read errors */ +static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret) +{ + IDEState *s = opaque; + int data_offset, n; + + if (ret < 0) { + ide_atapi_io_error(s, ret); + goto eot; + } + + if (s->io_buffer_size > 0) { + /* + * For a cdrom read sector command (s->lba != -1), + * adjust the lba for the next s->io_buffer_size chunk + * and dma the current chunk. + * For a command != read (s->lba == -1), just transfer + * the reply data. + */ + if (s->lba != -1) { + if (s->cd_sector_size == 2352) { + n = 1; + cd_data_to_raw(s->io_buffer, s->lba); + } else { + n = s->io_buffer_size >> 11; + } + s->lba += n; + } + s->packet_transfer_size -= s->io_buffer_size; + if (s->bus->dma->ops->rw_buf(s->bus->dma, 1) == 0) + goto eot; + } + + if (s->packet_transfer_size <= 0) { + s->status = READY_STAT | SEEK_STAT; + s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD; + ide_set_irq(s->bus); + goto eot; + } + + s->io_buffer_index = 0; + if (s->cd_sector_size == 2352) { + n = 1; + s->io_buffer_size = s->cd_sector_size; + data_offset = 16; + } else { + n = s->packet_transfer_size >> 11; + if (n > (IDE_DMA_BUF_SECTORS / 4)) + n = (IDE_DMA_BUF_SECTORS / 4); + s->io_buffer_size = n * 2048; + data_offset = 0; + } +#ifdef DEBUG_AIO + printf("aio_read_cd: lba=%u n=%d\n", s->lba, n); +#endif + + s->bus->dma->iov.iov_base = (void *)(s->io_buffer + data_offset); + s->bus->dma->iov.iov_len = n * 4 * 512; + qemu_iovec_init_external(&s->bus->dma->qiov, &s->bus->dma->iov, 1); + + s->bus->dma->aiocb = ide_buffered_readv(s, (int64_t)s->lba << 2, + &s->bus->dma->qiov, n * 4, + ide_atapi_cmd_read_dma_cb, s); + return; + +eot: + if (ret < 0) { + block_acct_failed(blk_get_stats(s->blk), &s->acct); + } else { + block_acct_done(blk_get_stats(s->blk), &s->acct); + } + ide_set_inactive(s, false); +} + +/* start a CD-CDROM read command with DMA */ +/* XXX: test if DMA is available */ +static void ide_atapi_cmd_read_dma(IDEState *s, int lba, int nb_sectors, + int sector_size) +{ + s->lba = lba; + s->packet_transfer_size = nb_sectors * sector_size; + s->io_buffer_size = 0; + s->cd_sector_size = sector_size; + + block_acct_start(blk_get_stats(s->blk), &s->acct, s->packet_transfer_size, + BLOCK_ACCT_READ); + + /* XXX: check if BUSY_STAT should be set */ + s->status = READY_STAT | SEEK_STAT | DRQ_STAT | BUSY_STAT; + ide_start_dma(s, ide_atapi_cmd_read_dma_cb); +} + +static void ide_atapi_cmd_read(IDEState *s, int lba, int nb_sectors, + int sector_size) +{ +#ifdef DEBUG_IDE_ATAPI + printf("read %s: LBA=%d nb_sectors=%d\n", s->atapi_dma ? "dma" : "pio", + lba, nb_sectors); +#endif + if (s->atapi_dma) { + ide_atapi_cmd_read_dma(s, lba, nb_sectors, sector_size); + } else { + ide_atapi_cmd_read_pio(s, lba, nb_sectors, sector_size); + } +} + + +/* Called by *_restart_bh when the transfer function points + * to ide_atapi_cmd + */ +void ide_atapi_dma_restart(IDEState *s) +{ + /* + * I'm not sure we have enough stored to restart the command + * safely, so give the guest an error it should recover from. + * I'm assuming most guests will try to recover from something + * listed as a medium error on a CD; it seems to work on Linux. + * This would be more of a problem if we did any other type of + * DMA operation. + */ + ide_atapi_cmd_error(s, MEDIUM_ERROR, ASC_NO_SEEK_COMPLETE); +} + +static inline uint8_t ide_atapi_set_profile(uint8_t *buf, uint8_t *index, + uint16_t profile) +{ + uint8_t *buf_profile = buf + 12; /* start of profiles */ + + buf_profile += ((*index) * 4); /* start of indexed profile */ + cpu_to_ube16 (buf_profile, profile); + buf_profile[2] = ((buf_profile[0] == buf[6]) && (buf_profile[1] == buf[7])); + + /* each profile adds 4 bytes to the response */ + (*index)++; + buf[11] += 4; /* Additional Length */ + + return 4; +} + +static int ide_dvd_read_structure(IDEState *s, int format, + const uint8_t *packet, uint8_t *buf) +{ + switch (format) { + case 0x0: /* Physical format information */ + { + int layer = packet[6]; + uint64_t total_sectors; + + if (layer != 0) + return -ASC_INV_FIELD_IN_CMD_PACKET; + + total_sectors = s->nb_sectors >> 2; + if (total_sectors == 0) { + return -ASC_MEDIUM_NOT_PRESENT; + } + + buf[4] = 1; /* DVD-ROM, part version 1 */ + buf[5] = 0xf; /* 120mm disc, minimum rate unspecified */ + buf[6] = 1; /* one layer, read-only (per MMC-2 spec) */ + buf[7] = 0; /* default densities */ + + /* FIXME: 0x30000 per spec? */ + cpu_to_ube32(buf + 8, 0); /* start sector */ + cpu_to_ube32(buf + 12, total_sectors - 1); /* end sector */ + cpu_to_ube32(buf + 16, total_sectors - 1); /* l0 end sector */ + + /* Size of buffer, not including 2 byte size field */ + stw_be_p(buf, 2048 + 2); + + /* 2k data + 4 byte header */ + return (2048 + 4); + } + + case 0x01: /* DVD copyright information */ + buf[4] = 0; /* no copyright data */ + buf[5] = 0; /* no region restrictions */ + + /* Size of buffer, not including 2 byte size field */ + stw_be_p(buf, 4 + 2); + + /* 4 byte header + 4 byte data */ + return (4 + 4); + + case 0x03: /* BCA information - invalid field for no BCA info */ + return -ASC_INV_FIELD_IN_CMD_PACKET; + + case 0x04: /* DVD disc manufacturing information */ + /* Size of buffer, not including 2 byte size field */ + stw_be_p(buf, 2048 + 2); + + /* 2k data + 4 byte header */ + return (2048 + 4); + + case 0xff: + /* + * This lists all the command capabilities above. Add new ones + * in order and update the length and buffer return values. + */ + + buf[4] = 0x00; /* Physical format */ + buf[5] = 0x40; /* Not writable, is readable */ + stw_be_p(buf + 6, 2048 + 4); + + buf[8] = 0x01; /* Copyright info */ + buf[9] = 0x40; /* Not writable, is readable */ + stw_be_p(buf + 10, 4 + 4); + + buf[12] = 0x03; /* BCA info */ + buf[13] = 0x40; /* Not writable, is readable */ + stw_be_p(buf + 14, 188 + 4); + + buf[16] = 0x04; /* Manufacturing info */ + buf[17] = 0x40; /* Not writable, is readable */ + stw_be_p(buf + 18, 2048 + 4); + + /* Size of buffer, not including 2 byte size field */ + stw_be_p(buf, 16 + 2); + + /* data written + 4 byte header */ + return (16 + 4); + + default: /* TODO: formats beyond DVD-ROM requires */ + return -ASC_INV_FIELD_IN_CMD_PACKET; + } +} + +static unsigned int event_status_media(IDEState *s, + uint8_t *buf) +{ + uint8_t event_code, media_status; + + media_status = 0; + if (s->tray_open) { + media_status = MS_TRAY_OPEN; + } else if (blk_is_inserted(s->blk)) { + media_status = MS_MEDIA_PRESENT; + } + + /* Event notification descriptor */ + event_code = MEC_NO_CHANGE; + if (media_status != MS_TRAY_OPEN) { + if (s->events.new_media) { + event_code = MEC_NEW_MEDIA; + s->events.new_media = false; + } else if (s->events.eject_request) { + event_code = MEC_EJECT_REQUESTED; + s->events.eject_request = false; + } + } + + buf[4] = event_code; + buf[5] = media_status; + + /* These fields are reserved, just clear them. */ + buf[6] = 0; + buf[7] = 0; + + return 8; /* We wrote to 4 extra bytes from the header */ +} + +static void cmd_get_event_status_notification(IDEState *s, + uint8_t *buf) +{ + const uint8_t *packet = buf; + + struct { + uint8_t opcode; + uint8_t polled; /* lsb bit is polled; others are reserved */ + uint8_t reserved2[2]; + uint8_t class; + uint8_t reserved3[2]; + uint16_t len; + uint8_t control; + } QEMU_PACKED *gesn_cdb; + + struct { + uint16_t len; + uint8_t notification_class; + uint8_t supported_events; + } QEMU_PACKED *gesn_event_header; + unsigned int max_len, used_len; + + gesn_cdb = (void *)packet; + gesn_event_header = (void *)buf; + + max_len = be16_to_cpu(gesn_cdb->len); + + /* It is fine by the MMC spec to not support async mode operations */ + if (!(gesn_cdb->polled & 0x01)) { /* asynchronous mode */ + /* Only polling is supported, asynchronous mode is not. */ + ide_atapi_cmd_error(s, ILLEGAL_REQUEST, + ASC_INV_FIELD_IN_CMD_PACKET); + return; + } + + /* polling mode operation */ + + /* + * These are the supported events. + * + * We currently only support requests of the 'media' type. + * Notification class requests and supported event classes are bitmasks, + * but they are build from the same values as the "notification class" + * field. + */ + gesn_event_header->supported_events = 1 << GESN_MEDIA; + + /* + * We use |= below to set the class field; other bits in this byte + * are reserved now but this is useful to do if we have to use the + * reserved fields later. + */ + gesn_event_header->notification_class = 0; + + /* + * Responses to requests are to be based on request priority. The + * notification_class_request_type enum above specifies the + * priority: upper elements are higher prio than lower ones. + */ + if (gesn_cdb->class & (1 << GESN_MEDIA)) { + gesn_event_header->notification_class |= GESN_MEDIA; + used_len = event_status_media(s, buf); + } else { + gesn_event_header->notification_class = 0x80; /* No event available */ + used_len = sizeof(*gesn_event_header); + } + gesn_event_header->len = cpu_to_be16(used_len + - sizeof(*gesn_event_header)); + ide_atapi_cmd_reply(s, used_len, max_len); +} + +static void cmd_request_sense(IDEState *s, uint8_t *buf) +{ + int max_len = buf[4]; + + memset(buf, 0, 18); + buf[0] = 0x70 | (1 << 7); + buf[2] = s->sense_key; + buf[7] = 10; + buf[12] = s->asc; + + if (s->sense_key == UNIT_ATTENTION) { + s->sense_key = NO_SENSE; + } + + ide_atapi_cmd_reply(s, 18, max_len); +} + +static void cmd_inquiry(IDEState *s, uint8_t *buf) +{ + uint8_t page_code = buf[2]; + int max_len = buf[4]; + + unsigned idx = 0; + unsigned size_idx; + unsigned preamble_len; + + /* If the EVPD (Enable Vital Product Data) bit is set in byte 1, + * we are being asked for a specific page of info indicated by byte 2. */ + if (buf[1] & 0x01) { + preamble_len = 4; + size_idx = 3; + + buf[idx++] = 0x05; /* CD-ROM */ + buf[idx++] = page_code; /* Page Code */ + buf[idx++] = 0x00; /* reserved */ + idx++; /* length (set later) */ + + switch (page_code) { + case 0x00: + /* Supported Pages: List of supported VPD responses. */ + buf[idx++] = 0x00; /* 0x00: Supported Pages, and: */ + buf[idx++] = 0x83; /* 0x83: Device Identification. */ + break; + + case 0x83: + /* Device Identification. Each entry is optional, but the entries + * included here are modeled after libata's VPD responses. + * If the response is given, at least one entry must be present. */ + + /* Entry 1: Serial */ + if (idx + 24 > max_len) { + /* Not enough room for even the first entry: */ + /* 4 byte header + 20 byte string */ + ide_atapi_cmd_error(s, ILLEGAL_REQUEST, + ASC_DATA_PHASE_ERROR); + return; + } + buf[idx++] = 0x02; /* Ascii */ + buf[idx++] = 0x00; /* Vendor Specific */ + buf[idx++] = 0x00; + buf[idx++] = 20; /* Remaining length */ + padstr8(buf + idx, 20, s->drive_serial_str); + idx += 20; + + /* Entry 2: Drive Model and Serial */ + if (idx + 72 > max_len) { + /* 4 (header) + 8 (vendor) + 60 (model & serial) */ + goto out; + } + buf[idx++] = 0x02; /* Ascii */ + buf[idx++] = 0x01; /* T10 Vendor */ + buf[idx++] = 0x00; + buf[idx++] = 68; + padstr8(buf + idx, 8, "ATA"); /* Generic T10 vendor */ + idx += 8; + padstr8(buf + idx, 40, s->drive_model_str); + idx += 40; + padstr8(buf + idx, 20, s->drive_serial_str); + idx += 20; + + /* Entry 3: WWN */ + if (s->wwn && (idx + 12 <= max_len)) { + /* 4 byte header + 8 byte wwn */ + buf[idx++] = 0x01; /* Binary */ + buf[idx++] = 0x03; /* NAA */ + buf[idx++] = 0x00; + buf[idx++] = 0x08; + stq_be_p(&buf[idx], s->wwn); + idx += 8; + } + break; + + default: + /* SPC-3, revision 23 sec. 6.4 */ + ide_atapi_cmd_error(s, ILLEGAL_REQUEST, + ASC_INV_FIELD_IN_CMD_PACKET); + return; + } + } else { + preamble_len = 5; + size_idx = 4; + + buf[0] = 0x05; /* CD-ROM */ + buf[1] = 0x80; /* removable */ + buf[2] = 0x00; /* ISO */ + buf[3] = 0x21; /* ATAPI-2 (XXX: put ATAPI-4 ?) */ + /* buf[size_idx] set below. */ + buf[5] = 0; /* reserved */ + buf[6] = 0; /* reserved */ + buf[7] = 0; /* reserved */ + padstr8(buf + 8, 8, "QEMU"); + padstr8(buf + 16, 16, "QEMU DVD-ROM"); + padstr8(buf + 32, 4, s->version); + idx = 36; + } + + out: + buf[size_idx] = idx - preamble_len; + ide_atapi_cmd_reply(s, idx, max_len); + return; +} + +static void cmd_get_configuration(IDEState *s, uint8_t *buf) +{ + uint32_t len; + uint8_t index = 0; + int max_len; + + /* only feature 0 is supported */ + if (buf[2] != 0 || buf[3] != 0) { + ide_atapi_cmd_error(s, ILLEGAL_REQUEST, + ASC_INV_FIELD_IN_CMD_PACKET); + return; + } + + /* XXX: could result in alignment problems in some architectures */ + max_len = ube16_to_cpu(buf + 7); + + /* + * XXX: avoid overflow for io_buffer if max_len is bigger than + * the size of that buffer (dimensioned to max number of + * sectors to transfer at once) + * + * Only a problem if the feature/profiles grow. + */ + if (max_len > 512) { + /* XXX: assume 1 sector */ + max_len = 512; + } + + memset(buf, 0, max_len); + /* + * the number of sectors from the media tells us which profile + * to use as current. 0 means there is no media + */ + if (media_is_dvd(s)) { + cpu_to_ube16(buf + 6, MMC_PROFILE_DVD_ROM); + } else if (media_is_cd(s)) { + cpu_to_ube16(buf + 6, MMC_PROFILE_CD_ROM); + } + + buf[10] = 0x02 | 0x01; /* persistent and current */ + len = 12; /* headers: 8 + 4 */ + len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_DVD_ROM); + len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_CD_ROM); + cpu_to_ube32(buf, len - 4); /* data length */ + + ide_atapi_cmd_reply(s, len, max_len); +} + +static void cmd_mode_sense(IDEState *s, uint8_t *buf) +{ + int action, code; + int max_len; + + max_len = ube16_to_cpu(buf + 7); + action = buf[2] >> 6; + code = buf[2] & 0x3f; + + switch(action) { + case 0: /* current values */ + switch(code) { + case MODE_PAGE_R_W_ERROR: /* error recovery */ + cpu_to_ube16(&buf[0], 16 - 2); + buf[2] = 0x70; + buf[3] = 0; + buf[4] = 0; + buf[5] = 0; + buf[6] = 0; + buf[7] = 0; + + buf[8] = MODE_PAGE_R_W_ERROR; + buf[9] = 16 - 10; + buf[10] = 0x00; + buf[11] = 0x05; + buf[12] = 0x00; + buf[13] = 0x00; + buf[14] = 0x00; + buf[15] = 0x00; + ide_atapi_cmd_reply(s, 16, max_len); + break; + case MODE_PAGE_AUDIO_CTL: + cpu_to_ube16(&buf[0], 24 - 2); + buf[2] = 0x70; + buf[3] = 0; + buf[4] = 0; + buf[5] = 0; + buf[6] = 0; + buf[7] = 0; + + buf[8] = MODE_PAGE_AUDIO_CTL; + buf[9] = 24 - 10; + /* Fill with CDROM audio volume */ + buf[17] = 0; + buf[19] = 0; + buf[21] = 0; + buf[23] = 0; + + ide_atapi_cmd_reply(s, 24, max_len); + break; + case MODE_PAGE_CAPABILITIES: + cpu_to_ube16(&buf[0], 30 - 2); + buf[2] = 0x70; + buf[3] = 0; + buf[4] = 0; + buf[5] = 0; + buf[6] = 0; + buf[7] = 0; + + buf[8] = MODE_PAGE_CAPABILITIES; + buf[9] = 30 - 10; + buf[10] = 0x3b; /* read CDR/CDRW/DVDROM/DVDR/DVDRAM */ + buf[11] = 0x00; + + /* Claim PLAY_AUDIO capability (0x01) since some Linux + code checks for this to automount media. */ + buf[12] = 0x71; + buf[13] = 3 << 5; + buf[14] = (1 << 0) | (1 << 3) | (1 << 5); + if (s->tray_locked) { + buf[14] |= 1 << 1; + } + buf[15] = 0x00; /* No volume & mute control, no changer */ + cpu_to_ube16(&buf[16], 704); /* 4x read speed */ + buf[18] = 0; /* Two volume levels */ + buf[19] = 2; + cpu_to_ube16(&buf[20], 512); /* 512k buffer */ + cpu_to_ube16(&buf[22], 704); /* 4x read speed current */ + buf[24] = 0; + buf[25] = 0; + buf[26] = 0; + buf[27] = 0; + buf[28] = 0; + buf[29] = 0; + ide_atapi_cmd_reply(s, 30, max_len); + break; + default: + goto error_cmd; + } + break; + case 1: /* changeable values */ + goto error_cmd; + case 2: /* default values */ + goto error_cmd; + default: + case 3: /* saved values */ + ide_atapi_cmd_error(s, ILLEGAL_REQUEST, + ASC_SAVING_PARAMETERS_NOT_SUPPORTED); + break; + } + return; + +error_cmd: + ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_INV_FIELD_IN_CMD_PACKET); +} + +static void cmd_test_unit_ready(IDEState *s, uint8_t *buf) +{ + /* Not Ready Conditions are already handled in ide_atapi_cmd(), so if we + * come here, we know that it's ready. */ + ide_atapi_cmd_ok(s); +} + +static void cmd_prevent_allow_medium_removal(IDEState *s, uint8_t* buf) +{ + s->tray_locked = buf[4] & 1; + blk_lock_medium(s->blk, buf[4] & 1); + ide_atapi_cmd_ok(s); +} + +static void cmd_read(IDEState *s, uint8_t* buf) +{ + int nb_sectors, lba; + + if (buf[0] == GPCMD_READ_10) { + nb_sectors = ube16_to_cpu(buf + 7); + } else { + nb_sectors = ube32_to_cpu(buf + 6); + } + + lba = ube32_to_cpu(buf + 2); + if (nb_sectors == 0) { + ide_atapi_cmd_ok(s); + return; + } + + ide_atapi_cmd_read(s, lba, nb_sectors, 2048); +} + +static void cmd_read_cd(IDEState *s, uint8_t* buf) +{ + int nb_sectors, lba, transfer_request; + + nb_sectors = (buf[6] << 16) | (buf[7] << 8) | buf[8]; + lba = ube32_to_cpu(buf + 2); + + if (nb_sectors == 0) { + ide_atapi_cmd_ok(s); + return; + } + + transfer_request = buf[9]; + switch(transfer_request & 0xf8) { + case 0x00: + /* nothing */ + ide_atapi_cmd_ok(s); + break; + case 0x10: + /* normal read */ + ide_atapi_cmd_read(s, lba, nb_sectors, 2048); + break; + case 0xf8: + /* read all data */ + ide_atapi_cmd_read(s, lba, nb_sectors, 2352); + break; + default: + ide_atapi_cmd_error(s, ILLEGAL_REQUEST, + ASC_INV_FIELD_IN_CMD_PACKET); + break; + } +} + +static void cmd_seek(IDEState *s, uint8_t* buf) +{ + unsigned int lba; + uint64_t total_sectors = s->nb_sectors >> 2; + + lba = ube32_to_cpu(buf + 2); + if (lba >= total_sectors) { + ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_LOGICAL_BLOCK_OOR); + return; + } + + ide_atapi_cmd_ok(s); +} + +static void cmd_start_stop_unit(IDEState *s, uint8_t* buf) +{ + int sense; + bool start = buf[4] & 1; + bool loej = buf[4] & 2; /* load on start, eject on !start */ + int pwrcnd = buf[4] & 0xf0; + + if (pwrcnd) { + /* eject/load only happens for power condition == 0 */ + ide_atapi_cmd_ok(s); + return; + } + + if (loej) { + if (!start && !s->tray_open && s->tray_locked) { + sense = blk_is_inserted(s->blk) + ? NOT_READY : ILLEGAL_REQUEST; + ide_atapi_cmd_error(s, sense, ASC_MEDIA_REMOVAL_PREVENTED); + return; + } + + if (s->tray_open != !start) { + blk_eject(s->blk, !start); + s->tray_open = !start; + } + } + + ide_atapi_cmd_ok(s); +} + +static void cmd_mechanism_status(IDEState *s, uint8_t* buf) +{ + int max_len = ube16_to_cpu(buf + 8); + + cpu_to_ube16(buf, 0); + /* no current LBA */ + buf[2] = 0; + buf[3] = 0; + buf[4] = 0; + buf[5] = 1; + cpu_to_ube16(buf + 6, 0); + ide_atapi_cmd_reply(s, 8, max_len); +} + +static void cmd_read_toc_pma_atip(IDEState *s, uint8_t* buf) +{ + int format, msf, start_track, len; + int max_len; + uint64_t total_sectors = s->nb_sectors >> 2; + + max_len = ube16_to_cpu(buf + 7); + format = buf[9] >> 6; + msf = (buf[1] >> 1) & 1; + start_track = buf[6]; + + switch(format) { + case 0: + len = cdrom_read_toc(total_sectors, buf, msf, start_track); + if (len < 0) + goto error_cmd; + ide_atapi_cmd_reply(s, len, max_len); + break; + case 1: + /* multi session : only a single session defined */ + memset(buf, 0, 12); + buf[1] = 0x0a; + buf[2] = 0x01; + buf[3] = 0x01; + ide_atapi_cmd_reply(s, 12, max_len); + break; + case 2: + len = cdrom_read_toc_raw(total_sectors, buf, msf, start_track); + if (len < 0) + goto error_cmd; + ide_atapi_cmd_reply(s, len, max_len); + break; + default: + error_cmd: + ide_atapi_cmd_error(s, ILLEGAL_REQUEST, + ASC_INV_FIELD_IN_CMD_PACKET); + } +} + +static void cmd_read_cdvd_capacity(IDEState *s, uint8_t* buf) +{ + uint64_t total_sectors = s->nb_sectors >> 2; + + /* NOTE: it is really the number of sectors minus 1 */ + cpu_to_ube32(buf, total_sectors - 1); + cpu_to_ube32(buf + 4, 2048); + ide_atapi_cmd_reply(s, 8, 8); +} + +static void cmd_read_disc_information(IDEState *s, uint8_t* buf) +{ + uint8_t type = buf[1] & 7; + uint32_t max_len = ube16_to_cpu(buf + 7); + + /* Types 1/2 are only defined for Blu-Ray. */ + if (type != 0) { + ide_atapi_cmd_error(s, ILLEGAL_REQUEST, + ASC_INV_FIELD_IN_CMD_PACKET); + return; + } + + memset(buf, 0, 34); + buf[1] = 32; + buf[2] = 0xe; /* last session complete, disc finalized */ + buf[3] = 1; /* first track on disc */ + buf[4] = 1; /* # of sessions */ + buf[5] = 1; /* first track of last session */ + buf[6] = 1; /* last track of last session */ + buf[7] = 0x20; /* unrestricted use */ + buf[8] = 0x00; /* CD-ROM or DVD-ROM */ + /* 9-10-11: most significant byte corresponding bytes 4-5-6 */ + /* 12-23: not meaningful for CD-ROM or DVD-ROM */ + /* 24-31: disc bar code */ + /* 32: disc application code */ + /* 33: number of OPC tables */ + + ide_atapi_cmd_reply(s, 34, max_len); +} + +static void cmd_read_dvd_structure(IDEState *s, uint8_t* buf) +{ + int max_len; + int media = buf[1]; + int format = buf[7]; + int ret; + + max_len = ube16_to_cpu(buf + 8); + + if (format < 0xff) { + if (media_is_cd(s)) { + ide_atapi_cmd_error(s, ILLEGAL_REQUEST, + ASC_INCOMPATIBLE_FORMAT); + return; + } else if (!media_present(s)) { + ide_atapi_cmd_error(s, ILLEGAL_REQUEST, + ASC_INV_FIELD_IN_CMD_PACKET); + return; + } + } + + memset(buf, 0, max_len > IDE_DMA_BUF_SECTORS * 512 + 4 ? + IDE_DMA_BUF_SECTORS * 512 + 4 : max_len); + + switch (format) { + case 0x00 ... 0x7f: + case 0xff: + if (media == 0) { + ret = ide_dvd_read_structure(s, format, buf, buf); + + if (ret < 0) { + ide_atapi_cmd_error(s, ILLEGAL_REQUEST, -ret); + } else { + ide_atapi_cmd_reply(s, ret, max_len); + } + + break; + } + /* TODO: BD support, fall through for now */ + + /* Generic disk structures */ + case 0x80: /* TODO: AACS volume identifier */ + case 0x81: /* TODO: AACS media serial number */ + case 0x82: /* TODO: AACS media identifier */ + case 0x83: /* TODO: AACS media key block */ + case 0x90: /* TODO: List of recognized format layers */ + case 0xc0: /* TODO: Write protection status */ + default: + ide_atapi_cmd_error(s, ILLEGAL_REQUEST, + ASC_INV_FIELD_IN_CMD_PACKET); + break; + } +} + +static void cmd_set_speed(IDEState *s, uint8_t* buf) +{ + ide_atapi_cmd_ok(s); +} + +enum { + /* + * Only commands flagged as ALLOW_UA are allowed to run under a + * unit attention condition. (See MMC-5, section 4.1.6.1) + */ + 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, + + /* + * 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 AtapiCmd { + void (*handler)(IDEState *s, uint8_t *buf); + int flags; +} atapi_cmd_table[0x100] = { + [ 0x00 ] = { cmd_test_unit_ready, CHECK_READY | NONDATA }, + [ 0x03 ] = { cmd_request_sense, ALLOW_UA }, + [ 0x12 ] = { cmd_inquiry, ALLOW_UA }, + [ 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 | NONDATA }, + [ 0x43 ] = { cmd_read_toc_pma_atip, CHECK_READY }, + [ 0x46 ] = { cmd_get_configuration, ALLOW_UA }, + [ 0x4a ] = { cmd_get_event_status_notification, ALLOW_UA }, + [ 0x51 ] = { cmd_read_disc_information, CHECK_READY }, + [ 0x5a ] = { cmd_mode_sense, /* (10) */ 0 }, + [ 0xa8 ] = { cmd_read, /* (12) */ CHECK_READY }, + [ 0xad ] = { cmd_read_dvd_structure, CHECK_READY }, + [ 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 */ +}; + +void ide_atapi_cmd(IDEState *s) +{ + uint8_t *buf = s->io_buffer; + const struct AtapiCmd *cmd = &atapi_cmd_table[s->io_buffer[0]]; + +#ifdef DEBUG_IDE_ATAPI + { + int i; + printf("ATAPI limit=0x%x packet:", s->lcyl | (s->hcyl << 8)); + for(i = 0; i < ATAPI_PACKET_SIZE; i++) { + printf(" %02x", buf[i]); + } + printf("\n"); + } +#endif + + /* + * If there's a UNIT_ATTENTION condition pending, only command flagged with + * ALLOW_UA are allowed to complete. with other commands getting a CHECK + * condition response unless a higher priority status, defined by the drive + * here, is pending. + */ + if (s->sense_key == UNIT_ATTENTION && !(cmd->flags & ALLOW_UA)) { + ide_atapi_cmd_check_status(s); + return; + } + /* + * When a CD gets changed, we have to report an ejected state and + * then a loaded state to guests so that they detect tray + * open/close and media change events. Guests that do not use + * GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close + * states rely on this behavior. + */ + if (!(cmd->flags & ALLOW_UA) && + !s->tray_open && blk_is_inserted(s->blk) && s->cdrom_changed) { + + if (s->cdrom_changed == 1) { + ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); + s->cdrom_changed = 2; + } else { + ide_atapi_cmd_error(s, UNIT_ATTENTION, ASC_MEDIUM_MAY_HAVE_CHANGED); + s->cdrom_changed = 0; + } + + return; + } + + /* Report a Not Ready condition if appropriate for the command */ + if ((cmd->flags & CHECK_READY) && + (!media_present(s) || !blk_is_inserted(s->blk))) + { + ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT); + 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 (cmd->handler && !(cmd->flags & NONDATA)) { + /* TODO: Check IDENTIFY data word 125 for default BCL (currently 0) */ + if (!(atapi_byte_count_limit(s) || s->atapi_dma)) { + /* TODO: Move abort back into core.c and make static inline again */ + ide_abort_command(s); + return; + } + } + + /* Execute the command */ + if (cmd->handler) { + cmd->handler(s, buf); + return; + } + + ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_ILLEGAL_OPCODE); +} |
