Merge remote-tracking branch 'remotes/philmd-gitlab/tags/renesas-20201027' into staging
[qemu.git] / hw / ide / atapi.c
1 /*
2 * QEMU ATAPI Emulation
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 * Copyright (c) 2006 Openedhand Ltd.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
24 */
25
26 #include "qemu/osdep.h"
27 #include "hw/ide/internal.h"
28 #include "hw/scsi/scsi.h"
29 #include "sysemu/block-backend.h"
30 #include "trace.h"
31
32 #define ATAPI_SECTOR_BITS (2 + BDRV_SECTOR_BITS)
33 #define ATAPI_SECTOR_SIZE (1 << ATAPI_SECTOR_BITS)
34
35 static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret);
36
37 static void padstr8(uint8_t *buf, int buf_size, const char *src)
38 {
39 int i;
40 for(i = 0; i < buf_size; i++) {
41 if (*src)
42 buf[i] = *src++;
43 else
44 buf[i] = ' ';
45 }
46 }
47
48 static void lba_to_msf(uint8_t *buf, int lba)
49 {
50 lba += 150;
51 buf[0] = (lba / 75) / 60;
52 buf[1] = (lba / 75) % 60;
53 buf[2] = lba % 75;
54 }
55
56 static inline int media_present(IDEState *s)
57 {
58 return !s->tray_open && s->nb_sectors > 0;
59 }
60
61 /* XXX: DVDs that could fit on a CD will be reported as a CD */
62 static inline int media_is_dvd(IDEState *s)
63 {
64 return (media_present(s) && s->nb_sectors > CD_MAX_SECTORS);
65 }
66
67 static inline int media_is_cd(IDEState *s)
68 {
69 return (media_present(s) && s->nb_sectors <= CD_MAX_SECTORS);
70 }
71
72 static void cd_data_to_raw(uint8_t *buf, int lba)
73 {
74 /* sync bytes */
75 buf[0] = 0x00;
76 memset(buf + 1, 0xff, 10);
77 buf[11] = 0x00;
78 buf += 12;
79 /* MSF */
80 lba_to_msf(buf, lba);
81 buf[3] = 0x01; /* mode 1 data */
82 buf += 4;
83 /* data */
84 buf += 2048;
85 /* XXX: ECC not computed */
86 memset(buf, 0, 288);
87 }
88
89 static int
90 cd_read_sector_sync(IDEState *s)
91 {
92 int ret;
93 block_acct_start(blk_get_stats(s->blk), &s->acct,
94 ATAPI_SECTOR_SIZE, BLOCK_ACCT_READ);
95
96 trace_cd_read_sector_sync(s->lba);
97
98 switch (s->cd_sector_size) {
99 case 2048:
100 ret = blk_pread(s->blk, (int64_t)s->lba << ATAPI_SECTOR_BITS,
101 s->io_buffer, ATAPI_SECTOR_SIZE);
102 break;
103 case 2352:
104 ret = blk_pread(s->blk, (int64_t)s->lba << ATAPI_SECTOR_BITS,
105 s->io_buffer + 16, ATAPI_SECTOR_SIZE);
106 if (ret >= 0) {
107 cd_data_to_raw(s->io_buffer, s->lba);
108 }
109 break;
110 default:
111 block_acct_invalid(blk_get_stats(s->blk), BLOCK_ACCT_READ);
112 return -EIO;
113 }
114
115 if (ret < 0) {
116 block_acct_failed(blk_get_stats(s->blk), &s->acct);
117 } else {
118 block_acct_done(blk_get_stats(s->blk), &s->acct);
119 s->lba++;
120 s->io_buffer_index = 0;
121 }
122
123 return ret;
124 }
125
126 static void cd_read_sector_cb(void *opaque, int ret)
127 {
128 IDEState *s = opaque;
129
130 trace_cd_read_sector_cb(s->lba, ret);
131
132 if (ret < 0) {
133 block_acct_failed(blk_get_stats(s->blk), &s->acct);
134 ide_atapi_io_error(s, ret);
135 return;
136 }
137
138 block_acct_done(blk_get_stats(s->blk), &s->acct);
139
140 if (s->cd_sector_size == 2352) {
141 cd_data_to_raw(s->io_buffer, s->lba);
142 }
143
144 s->lba++;
145 s->io_buffer_index = 0;
146 s->status &= ~BUSY_STAT;
147
148 ide_atapi_cmd_reply_end(s);
149 }
150
151 static int cd_read_sector(IDEState *s)
152 {
153 void *buf;
154
155 if (s->cd_sector_size != 2048 && s->cd_sector_size != 2352) {
156 block_acct_invalid(blk_get_stats(s->blk), BLOCK_ACCT_READ);
157 return -EINVAL;
158 }
159
160 buf = (s->cd_sector_size == 2352) ? s->io_buffer + 16 : s->io_buffer;
161 qemu_iovec_init_buf(&s->qiov, buf, ATAPI_SECTOR_SIZE);
162
163 trace_cd_read_sector(s->lba);
164
165 block_acct_start(blk_get_stats(s->blk), &s->acct,
166 ATAPI_SECTOR_SIZE, BLOCK_ACCT_READ);
167
168 ide_buffered_readv(s, (int64_t)s->lba << 2, &s->qiov, 4,
169 cd_read_sector_cb, s);
170
171 s->status |= BUSY_STAT;
172 return 0;
173 }
174
175 void ide_atapi_cmd_ok(IDEState *s)
176 {
177 s->error = 0;
178 s->status = READY_STAT | SEEK_STAT;
179 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD;
180 ide_transfer_stop(s);
181 ide_set_irq(s->bus);
182 }
183
184 void ide_atapi_cmd_error(IDEState *s, int sense_key, int asc)
185 {
186 trace_ide_atapi_cmd_error(s, sense_key, asc);
187 s->error = sense_key << 4;
188 s->status = READY_STAT | ERR_STAT;
189 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD;
190 s->sense_key = sense_key;
191 s->asc = asc;
192 ide_transfer_stop(s);
193 ide_set_irq(s->bus);
194 }
195
196 void ide_atapi_io_error(IDEState *s, int ret)
197 {
198 /* XXX: handle more errors */
199 if (ret == -ENOMEDIUM) {
200 ide_atapi_cmd_error(s, NOT_READY,
201 ASC_MEDIUM_NOT_PRESENT);
202 } else {
203 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
204 ASC_LOGICAL_BLOCK_OOR);
205 }
206 }
207
208 static uint16_t atapi_byte_count_limit(IDEState *s)
209 {
210 uint16_t bcl;
211
212 bcl = s->lcyl | (s->hcyl << 8);
213 if (bcl == 0xffff) {
214 return 0xfffe;
215 }
216 return bcl;
217 }
218
219 /* The whole ATAPI transfer logic is handled in this function */
220 void ide_atapi_cmd_reply_end(IDEState *s)
221 {
222 int byte_count_limit, size, ret;
223 while (s->packet_transfer_size > 0) {
224 trace_ide_atapi_cmd_reply_end(s, s->packet_transfer_size,
225 s->elementary_transfer_size,
226 s->io_buffer_index);
227
228 /* see if a new sector must be read */
229 if (s->lba != -1 && s->io_buffer_index >= s->cd_sector_size) {
230 if (!s->elementary_transfer_size) {
231 ret = cd_read_sector(s);
232 if (ret < 0) {
233 ide_atapi_io_error(s, ret);
234 }
235 return;
236 } else {
237 /* rebuffering within an elementary transfer is
238 * only possible with a sync request because we
239 * end up with a race condition otherwise */
240 ret = cd_read_sector_sync(s);
241 if (ret < 0) {
242 ide_atapi_io_error(s, ret);
243 return;
244 }
245 }
246 }
247 if (s->elementary_transfer_size > 0) {
248 /* there are some data left to transmit in this elementary
249 transfer */
250 size = s->cd_sector_size - s->io_buffer_index;
251 if (size > s->elementary_transfer_size)
252 size = s->elementary_transfer_size;
253 } else {
254 /* a new transfer is needed */
255 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO;
256 ide_set_irq(s->bus);
257 byte_count_limit = atapi_byte_count_limit(s);
258 trace_ide_atapi_cmd_reply_end_bcl(s, byte_count_limit);
259 size = s->packet_transfer_size;
260 if (size > byte_count_limit) {
261 /* byte count limit must be even if this case */
262 if (byte_count_limit & 1)
263 byte_count_limit--;
264 size = byte_count_limit;
265 }
266 s->lcyl = size;
267 s->hcyl = size >> 8;
268 s->elementary_transfer_size = size;
269 /* we cannot transmit more than one sector at a time */
270 if (s->lba != -1) {
271 if (size > (s->cd_sector_size - s->io_buffer_index))
272 size = (s->cd_sector_size - s->io_buffer_index);
273 }
274 trace_ide_atapi_cmd_reply_end_new(s, s->status);
275 }
276 s->packet_transfer_size -= size;
277 s->elementary_transfer_size -= size;
278 s->io_buffer_index += size;
279
280 /* Some adapters process PIO data right away. In that case, we need
281 * to avoid mutual recursion between ide_transfer_start
282 * and ide_atapi_cmd_reply_end.
283 */
284 if (!ide_transfer_start_norecurse(s,
285 s->io_buffer + s->io_buffer_index - size,
286 size, ide_atapi_cmd_reply_end)) {
287 return;
288 }
289 }
290
291 /* end of transfer */
292 trace_ide_atapi_cmd_reply_end_eot(s, s->status);
293 ide_atapi_cmd_ok(s);
294 ide_set_irq(s->bus);
295 }
296
297 /* send a reply of 'size' bytes in s->io_buffer to an ATAPI command */
298 static void ide_atapi_cmd_reply(IDEState *s, int size, int max_size)
299 {
300 if (size > max_size)
301 size = max_size;
302 s->lba = -1; /* no sector read */
303 s->packet_transfer_size = size;
304 s->io_buffer_size = size; /* dma: send the reply data as one chunk */
305 s->elementary_transfer_size = 0;
306
307 if (s->atapi_dma) {
308 block_acct_start(blk_get_stats(s->blk), &s->acct, size,
309 BLOCK_ACCT_READ);
310 s->status = READY_STAT | SEEK_STAT | DRQ_STAT;
311 ide_start_dma(s, ide_atapi_cmd_read_dma_cb);
312 } else {
313 s->status = READY_STAT | SEEK_STAT;
314 s->io_buffer_index = 0;
315 ide_atapi_cmd_reply_end(s);
316 }
317 }
318
319 /* start a CD-CDROM read command */
320 static void ide_atapi_cmd_read_pio(IDEState *s, int lba, int nb_sectors,
321 int sector_size)
322 {
323 s->lba = lba;
324 s->packet_transfer_size = nb_sectors * sector_size;
325 s->elementary_transfer_size = 0;
326 s->io_buffer_index = sector_size;
327 s->cd_sector_size = sector_size;
328
329 ide_atapi_cmd_reply_end(s);
330 }
331
332 static void ide_atapi_cmd_check_status(IDEState *s)
333 {
334 trace_ide_atapi_cmd_check_status(s);
335 s->error = MC_ERR | (UNIT_ATTENTION << 4);
336 s->status = ERR_STAT;
337 s->nsector = 0;
338 ide_set_irq(s->bus);
339 }
340 /* ATAPI DMA support */
341
342 static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret)
343 {
344 IDEState *s = opaque;
345 int data_offset, n;
346
347 if (ret < 0) {
348 if (ide_handle_rw_error(s, -ret, ide_dma_cmd_to_retry(s->dma_cmd))) {
349 if (s->bus->error_status) {
350 s->bus->dma->aiocb = NULL;
351 return;
352 }
353 goto eot;
354 }
355 }
356
357 if (s->io_buffer_size > 0) {
358 /*
359 * For a cdrom read sector command (s->lba != -1),
360 * adjust the lba for the next s->io_buffer_size chunk
361 * and dma the current chunk.
362 * For a command != read (s->lba == -1), just transfer
363 * the reply data.
364 */
365 if (s->lba != -1) {
366 if (s->cd_sector_size == 2352) {
367 n = 1;
368 cd_data_to_raw(s->io_buffer, s->lba);
369 } else {
370 n = s->io_buffer_size >> 11;
371 }
372 s->lba += n;
373 }
374 s->packet_transfer_size -= s->io_buffer_size;
375 if (s->bus->dma->ops->rw_buf(s->bus->dma, 1) == 0)
376 goto eot;
377 }
378
379 if (s->packet_transfer_size <= 0) {
380 s->status = READY_STAT | SEEK_STAT;
381 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD;
382 ide_set_irq(s->bus);
383 goto eot;
384 }
385
386 s->io_buffer_index = 0;
387 if (s->cd_sector_size == 2352) {
388 n = 1;
389 s->io_buffer_size = s->cd_sector_size;
390 data_offset = 16;
391 } else {
392 n = s->packet_transfer_size >> 11;
393 if (n > (IDE_DMA_BUF_SECTORS / 4))
394 n = (IDE_DMA_BUF_SECTORS / 4);
395 s->io_buffer_size = n * 2048;
396 data_offset = 0;
397 }
398 trace_ide_atapi_cmd_read_dma_cb_aio(s, s->lba, n);
399 qemu_iovec_init_buf(&s->bus->dma->qiov, s->io_buffer + data_offset,
400 n * ATAPI_SECTOR_SIZE);
401
402 s->bus->dma->aiocb = ide_buffered_readv(s, (int64_t)s->lba << 2,
403 &s->bus->dma->qiov, n * 4,
404 ide_atapi_cmd_read_dma_cb, s);
405 return;
406
407 eot:
408 if (ret < 0) {
409 block_acct_failed(blk_get_stats(s->blk), &s->acct);
410 } else {
411 block_acct_done(blk_get_stats(s->blk), &s->acct);
412 }
413 ide_set_inactive(s, false);
414 }
415
416 /* start a CD-CDROM read command with DMA */
417 /* XXX: test if DMA is available */
418 static void ide_atapi_cmd_read_dma(IDEState *s, int lba, int nb_sectors,
419 int sector_size)
420 {
421 s->lba = lba;
422 s->packet_transfer_size = nb_sectors * sector_size;
423 s->io_buffer_size = 0;
424 s->cd_sector_size = sector_size;
425
426 block_acct_start(blk_get_stats(s->blk), &s->acct, s->packet_transfer_size,
427 BLOCK_ACCT_READ);
428
429 /* XXX: check if BUSY_STAT should be set */
430 s->status = READY_STAT | SEEK_STAT | DRQ_STAT | BUSY_STAT;
431 ide_start_dma(s, ide_atapi_cmd_read_dma_cb);
432 }
433
434 static void ide_atapi_cmd_read(IDEState *s, int lba, int nb_sectors,
435 int sector_size)
436 {
437 trace_ide_atapi_cmd_read(s, s->atapi_dma ? "dma" : "pio",
438 lba, nb_sectors);
439 if (s->atapi_dma) {
440 ide_atapi_cmd_read_dma(s, lba, nb_sectors, sector_size);
441 } else {
442 ide_atapi_cmd_read_pio(s, lba, nb_sectors, sector_size);
443 }
444 }
445
446 void ide_atapi_dma_restart(IDEState *s)
447 {
448 /*
449 * At this point we can just re-evaluate the packet command and start over.
450 * The presence of ->dma_cb callback in the pre_save ensures that the packet
451 * command has been completely sent and we can safely restart command.
452 */
453 s->unit = s->bus->retry_unit;
454 s->bus->dma->ops->restart_dma(s->bus->dma);
455 ide_atapi_cmd(s);
456 }
457
458 static inline uint8_t ide_atapi_set_profile(uint8_t *buf, uint8_t *index,
459 uint16_t profile)
460 {
461 uint8_t *buf_profile = buf + 12; /* start of profiles */
462
463 buf_profile += ((*index) * 4); /* start of indexed profile */
464 stw_be_p(buf_profile, profile);
465 buf_profile[2] = ((buf_profile[0] == buf[6]) && (buf_profile[1] == buf[7]));
466
467 /* each profile adds 4 bytes to the response */
468 (*index)++;
469 buf[11] += 4; /* Additional Length */
470
471 return 4;
472 }
473
474 static int ide_dvd_read_structure(IDEState *s, int format,
475 const uint8_t *packet, uint8_t *buf)
476 {
477 switch (format) {
478 case 0x0: /* Physical format information */
479 {
480 int layer = packet[6];
481 uint64_t total_sectors;
482
483 if (layer != 0)
484 return -ASC_INV_FIELD_IN_CMD_PACKET;
485
486 total_sectors = s->nb_sectors >> 2;
487 if (total_sectors == 0) {
488 return -ASC_MEDIUM_NOT_PRESENT;
489 }
490
491 buf[4] = 1; /* DVD-ROM, part version 1 */
492 buf[5] = 0xf; /* 120mm disc, minimum rate unspecified */
493 buf[6] = 1; /* one layer, read-only (per MMC-2 spec) */
494 buf[7] = 0; /* default densities */
495
496 /* FIXME: 0x30000 per spec? */
497 stl_be_p(buf + 8, 0); /* start sector */
498 stl_be_p(buf + 12, total_sectors - 1); /* end sector */
499 stl_be_p(buf + 16, total_sectors - 1); /* l0 end sector */
500
501 /* Size of buffer, not including 2 byte size field */
502 stw_be_p(buf, 2048 + 2);
503
504 /* 2k data + 4 byte header */
505 return (2048 + 4);
506 }
507
508 case 0x01: /* DVD copyright information */
509 buf[4] = 0; /* no copyright data */
510 buf[5] = 0; /* no region restrictions */
511
512 /* Size of buffer, not including 2 byte size field */
513 stw_be_p(buf, 4 + 2);
514
515 /* 4 byte header + 4 byte data */
516 return (4 + 4);
517
518 case 0x03: /* BCA information - invalid field for no BCA info */
519 return -ASC_INV_FIELD_IN_CMD_PACKET;
520
521 case 0x04: /* DVD disc manufacturing information */
522 /* Size of buffer, not including 2 byte size field */
523 stw_be_p(buf, 2048 + 2);
524
525 /* 2k data + 4 byte header */
526 return (2048 + 4);
527
528 case 0xff:
529 /*
530 * This lists all the command capabilities above. Add new ones
531 * in order and update the length and buffer return values.
532 */
533
534 buf[4] = 0x00; /* Physical format */
535 buf[5] = 0x40; /* Not writable, is readable */
536 stw_be_p(buf + 6, 2048 + 4);
537
538 buf[8] = 0x01; /* Copyright info */
539 buf[9] = 0x40; /* Not writable, is readable */
540 stw_be_p(buf + 10, 4 + 4);
541
542 buf[12] = 0x03; /* BCA info */
543 buf[13] = 0x40; /* Not writable, is readable */
544 stw_be_p(buf + 14, 188 + 4);
545
546 buf[16] = 0x04; /* Manufacturing info */
547 buf[17] = 0x40; /* Not writable, is readable */
548 stw_be_p(buf + 18, 2048 + 4);
549
550 /* Size of buffer, not including 2 byte size field */
551 stw_be_p(buf, 16 + 2);
552
553 /* data written + 4 byte header */
554 return (16 + 4);
555
556 default: /* TODO: formats beyond DVD-ROM requires */
557 return -ASC_INV_FIELD_IN_CMD_PACKET;
558 }
559 }
560
561 static unsigned int event_status_media(IDEState *s,
562 uint8_t *buf)
563 {
564 uint8_t event_code, media_status;
565
566 media_status = 0;
567 if (s->tray_open) {
568 media_status = MS_TRAY_OPEN;
569 } else if (blk_is_inserted(s->blk)) {
570 media_status = MS_MEDIA_PRESENT;
571 }
572
573 /* Event notification descriptor */
574 event_code = MEC_NO_CHANGE;
575 if (media_status != MS_TRAY_OPEN) {
576 if (s->events.new_media) {
577 event_code = MEC_NEW_MEDIA;
578 s->events.new_media = false;
579 } else if (s->events.eject_request) {
580 event_code = MEC_EJECT_REQUESTED;
581 s->events.eject_request = false;
582 }
583 }
584
585 buf[4] = event_code;
586 buf[5] = media_status;
587
588 /* These fields are reserved, just clear them. */
589 buf[6] = 0;
590 buf[7] = 0;
591
592 return 8; /* We wrote to 4 extra bytes from the header */
593 }
594
595 /*
596 * Before transferring data or otherwise signalling acceptance of a command
597 * marked CONDDATA, we must check the validity of the byte_count_limit.
598 */
599 static bool validate_bcl(IDEState *s)
600 {
601 /* TODO: Check IDENTIFY data word 125 for defacult BCL (currently 0) */
602 if (s->atapi_dma || atapi_byte_count_limit(s)) {
603 return true;
604 }
605
606 /* TODO: Move abort back into core.c and introduce proper error flow between
607 * ATAPI layer and IDE core layer */
608 ide_abort_command(s);
609 return false;
610 }
611
612 static void cmd_get_event_status_notification(IDEState *s,
613 uint8_t *buf)
614 {
615 const uint8_t *packet = buf;
616
617 struct {
618 uint8_t opcode;
619 uint8_t polled; /* lsb bit is polled; others are reserved */
620 uint8_t reserved2[2];
621 uint8_t class;
622 uint8_t reserved3[2];
623 uint16_t len;
624 uint8_t control;
625 } QEMU_PACKED *gesn_cdb;
626
627 struct {
628 uint16_t len;
629 uint8_t notification_class;
630 uint8_t supported_events;
631 } QEMU_PACKED *gesn_event_header;
632 unsigned int max_len, used_len;
633
634 gesn_cdb = (void *)packet;
635 gesn_event_header = (void *)buf;
636
637 max_len = be16_to_cpu(gesn_cdb->len);
638
639 /* It is fine by the MMC spec to not support async mode operations */
640 if (!(gesn_cdb->polled & 0x01)) { /* asynchronous mode */
641 /* Only polling is supported, asynchronous mode is not. */
642 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
643 ASC_INV_FIELD_IN_CMD_PACKET);
644 return;
645 }
646
647 /* polling mode operation */
648
649 /*
650 * These are the supported events.
651 *
652 * We currently only support requests of the 'media' type.
653 * Notification class requests and supported event classes are bitmasks,
654 * but they are build from the same values as the "notification class"
655 * field.
656 */
657 gesn_event_header->supported_events = 1 << GESN_MEDIA;
658
659 /*
660 * We use |= below to set the class field; other bits in this byte
661 * are reserved now but this is useful to do if we have to use the
662 * reserved fields later.
663 */
664 gesn_event_header->notification_class = 0;
665
666 /*
667 * Responses to requests are to be based on request priority. The
668 * notification_class_request_type enum above specifies the
669 * priority: upper elements are higher prio than lower ones.
670 */
671 if (gesn_cdb->class & (1 << GESN_MEDIA)) {
672 gesn_event_header->notification_class |= GESN_MEDIA;
673 used_len = event_status_media(s, buf);
674 } else {
675 gesn_event_header->notification_class = 0x80; /* No event available */
676 used_len = sizeof(*gesn_event_header);
677 }
678 gesn_event_header->len = cpu_to_be16(used_len
679 - sizeof(*gesn_event_header));
680 ide_atapi_cmd_reply(s, used_len, max_len);
681 }
682
683 static void cmd_request_sense(IDEState *s, uint8_t *buf)
684 {
685 int max_len = buf[4];
686
687 memset(buf, 0, 18);
688 buf[0] = 0x70 | (1 << 7);
689 buf[2] = s->sense_key;
690 buf[7] = 10;
691 buf[12] = s->asc;
692
693 if (s->sense_key == UNIT_ATTENTION) {
694 s->sense_key = NO_SENSE;
695 }
696
697 ide_atapi_cmd_reply(s, 18, max_len);
698 }
699
700 static void cmd_inquiry(IDEState *s, uint8_t *buf)
701 {
702 uint8_t page_code = buf[2];
703 int max_len = buf[4];
704
705 unsigned idx = 0;
706 unsigned size_idx;
707 unsigned preamble_len;
708
709 /* If the EVPD (Enable Vital Product Data) bit is set in byte 1,
710 * we are being asked for a specific page of info indicated by byte 2. */
711 if (buf[1] & 0x01) {
712 preamble_len = 4;
713 size_idx = 3;
714
715 buf[idx++] = 0x05; /* CD-ROM */
716 buf[idx++] = page_code; /* Page Code */
717 buf[idx++] = 0x00; /* reserved */
718 idx++; /* length (set later) */
719
720 switch (page_code) {
721 case 0x00:
722 /* Supported Pages: List of supported VPD responses. */
723 buf[idx++] = 0x00; /* 0x00: Supported Pages, and: */
724 buf[idx++] = 0x83; /* 0x83: Device Identification. */
725 break;
726
727 case 0x83:
728 /* Device Identification. Each entry is optional, but the entries
729 * included here are modeled after libata's VPD responses.
730 * If the response is given, at least one entry must be present. */
731
732 /* Entry 1: Serial */
733 if (idx + 24 > max_len) {
734 /* Not enough room for even the first entry: */
735 /* 4 byte header + 20 byte string */
736 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
737 ASC_DATA_PHASE_ERROR);
738 return;
739 }
740 buf[idx++] = 0x02; /* Ascii */
741 buf[idx++] = 0x00; /* Vendor Specific */
742 buf[idx++] = 0x00;
743 buf[idx++] = 20; /* Remaining length */
744 padstr8(buf + idx, 20, s->drive_serial_str);
745 idx += 20;
746
747 /* Entry 2: Drive Model and Serial */
748 if (idx + 72 > max_len) {
749 /* 4 (header) + 8 (vendor) + 60 (model & serial) */
750 goto out;
751 }
752 buf[idx++] = 0x02; /* Ascii */
753 buf[idx++] = 0x01; /* T10 Vendor */
754 buf[idx++] = 0x00;
755 buf[idx++] = 68;
756 padstr8(buf + idx, 8, "ATA"); /* Generic T10 vendor */
757 idx += 8;
758 padstr8(buf + idx, 40, s->drive_model_str);
759 idx += 40;
760 padstr8(buf + idx, 20, s->drive_serial_str);
761 idx += 20;
762
763 /* Entry 3: WWN */
764 if (s->wwn && (idx + 12 <= max_len)) {
765 /* 4 byte header + 8 byte wwn */
766 buf[idx++] = 0x01; /* Binary */
767 buf[idx++] = 0x03; /* NAA */
768 buf[idx++] = 0x00;
769 buf[idx++] = 0x08;
770 stq_be_p(&buf[idx], s->wwn);
771 idx += 8;
772 }
773 break;
774
775 default:
776 /* SPC-3, revision 23 sec. 6.4 */
777 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
778 ASC_INV_FIELD_IN_CMD_PACKET);
779 return;
780 }
781 } else {
782 preamble_len = 5;
783 size_idx = 4;
784
785 buf[0] = 0x05; /* CD-ROM */
786 buf[1] = 0x80; /* removable */
787 buf[2] = 0x00; /* ISO */
788 buf[3] = 0x21; /* ATAPI-2 (XXX: put ATAPI-4 ?) */
789 /* buf[size_idx] set below. */
790 buf[5] = 0; /* reserved */
791 buf[6] = 0; /* reserved */
792 buf[7] = 0; /* reserved */
793 padstr8(buf + 8, 8, "QEMU");
794 padstr8(buf + 16, 16, "QEMU DVD-ROM");
795 padstr8(buf + 32, 4, s->version);
796 idx = 36;
797 }
798
799 out:
800 buf[size_idx] = idx - preamble_len;
801 ide_atapi_cmd_reply(s, idx, max_len);
802 }
803
804 static void cmd_get_configuration(IDEState *s, uint8_t *buf)
805 {
806 uint32_t len;
807 uint8_t index = 0;
808 int max_len;
809
810 /* only feature 0 is supported */
811 if (buf[2] != 0 || buf[3] != 0) {
812 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
813 ASC_INV_FIELD_IN_CMD_PACKET);
814 return;
815 }
816
817 /* XXX: could result in alignment problems in some architectures */
818 max_len = lduw_be_p(buf + 7);
819
820 /*
821 * XXX: avoid overflow for io_buffer if max_len is bigger than
822 * the size of that buffer (dimensioned to max number of
823 * sectors to transfer at once)
824 *
825 * Only a problem if the feature/profiles grow.
826 */
827 if (max_len > BDRV_SECTOR_SIZE) {
828 /* XXX: assume 1 sector */
829 max_len = BDRV_SECTOR_SIZE;
830 }
831
832 memset(buf, 0, max_len);
833 /*
834 * the number of sectors from the media tells us which profile
835 * to use as current. 0 means there is no media
836 */
837 if (media_is_dvd(s)) {
838 stw_be_p(buf + 6, MMC_PROFILE_DVD_ROM);
839 } else if (media_is_cd(s)) {
840 stw_be_p(buf + 6, MMC_PROFILE_CD_ROM);
841 }
842
843 buf[10] = 0x02 | 0x01; /* persistent and current */
844 len = 12; /* headers: 8 + 4 */
845 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_DVD_ROM);
846 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_CD_ROM);
847 stl_be_p(buf, len - 4); /* data length */
848
849 ide_atapi_cmd_reply(s, len, max_len);
850 }
851
852 static void cmd_mode_sense(IDEState *s, uint8_t *buf)
853 {
854 int action, code;
855 int max_len;
856
857 max_len = lduw_be_p(buf + 7);
858 action = buf[2] >> 6;
859 code = buf[2] & 0x3f;
860
861 switch(action) {
862 case 0: /* current values */
863 switch(code) {
864 case MODE_PAGE_R_W_ERROR: /* error recovery */
865 stw_be_p(&buf[0], 16 - 2);
866 buf[2] = 0x70;
867 buf[3] = 0;
868 buf[4] = 0;
869 buf[5] = 0;
870 buf[6] = 0;
871 buf[7] = 0;
872
873 buf[8] = MODE_PAGE_R_W_ERROR;
874 buf[9] = 16 - 10;
875 buf[10] = 0x00;
876 buf[11] = 0x05;
877 buf[12] = 0x00;
878 buf[13] = 0x00;
879 buf[14] = 0x00;
880 buf[15] = 0x00;
881 ide_atapi_cmd_reply(s, 16, max_len);
882 break;
883 case MODE_PAGE_AUDIO_CTL:
884 stw_be_p(&buf[0], 24 - 2);
885 buf[2] = 0x70;
886 buf[3] = 0;
887 buf[4] = 0;
888 buf[5] = 0;
889 buf[6] = 0;
890 buf[7] = 0;
891
892 buf[8] = MODE_PAGE_AUDIO_CTL;
893 buf[9] = 24 - 10;
894 /* Fill with CDROM audio volume */
895 buf[17] = 0;
896 buf[19] = 0;
897 buf[21] = 0;
898 buf[23] = 0;
899
900 ide_atapi_cmd_reply(s, 24, max_len);
901 break;
902 case MODE_PAGE_CAPABILITIES:
903 stw_be_p(&buf[0], 30 - 2);
904 buf[2] = 0x70;
905 buf[3] = 0;
906 buf[4] = 0;
907 buf[5] = 0;
908 buf[6] = 0;
909 buf[7] = 0;
910
911 buf[8] = MODE_PAGE_CAPABILITIES;
912 buf[9] = 30 - 10;
913 buf[10] = 0x3b; /* read CDR/CDRW/DVDROM/DVDR/DVDRAM */
914 buf[11] = 0x00;
915
916 /* Claim PLAY_AUDIO capability (0x01) since some Linux
917 code checks for this to automount media. */
918 buf[12] = 0x71;
919 buf[13] = 3 << 5;
920 buf[14] = (1 << 0) | (1 << 3) | (1 << 5);
921 if (s->tray_locked) {
922 buf[14] |= 1 << 1;
923 }
924 buf[15] = 0x00; /* No volume & mute control, no changer */
925 stw_be_p(&buf[16], 704); /* 4x read speed */
926 buf[18] = 0; /* Two volume levels */
927 buf[19] = 2;
928 stw_be_p(&buf[20], 512); /* 512k buffer */
929 stw_be_p(&buf[22], 704); /* 4x read speed current */
930 buf[24] = 0;
931 buf[25] = 0;
932 buf[26] = 0;
933 buf[27] = 0;
934 buf[28] = 0;
935 buf[29] = 0;
936 ide_atapi_cmd_reply(s, 30, max_len);
937 break;
938 default:
939 goto error_cmd;
940 }
941 break;
942 case 1: /* changeable values */
943 goto error_cmd;
944 case 2: /* default values */
945 goto error_cmd;
946 default:
947 case 3: /* saved values */
948 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
949 ASC_SAVING_PARAMETERS_NOT_SUPPORTED);
950 break;
951 }
952 return;
953
954 error_cmd:
955 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_INV_FIELD_IN_CMD_PACKET);
956 }
957
958 static void cmd_test_unit_ready(IDEState *s, uint8_t *buf)
959 {
960 /* Not Ready Conditions are already handled in ide_atapi_cmd(), so if we
961 * come here, we know that it's ready. */
962 ide_atapi_cmd_ok(s);
963 }
964
965 static void cmd_prevent_allow_medium_removal(IDEState *s, uint8_t* buf)
966 {
967 s->tray_locked = buf[4] & 1;
968 blk_lock_medium(s->blk, buf[4] & 1);
969 ide_atapi_cmd_ok(s);
970 }
971
972 static void cmd_read(IDEState *s, uint8_t* buf)
973 {
974 int nb_sectors, lba;
975
976 if (buf[0] == GPCMD_READ_10) {
977 nb_sectors = lduw_be_p(buf + 7);
978 } else {
979 nb_sectors = ldl_be_p(buf + 6);
980 }
981
982 lba = ldl_be_p(buf + 2);
983 if (nb_sectors == 0) {
984 ide_atapi_cmd_ok(s);
985 return;
986 }
987
988 ide_atapi_cmd_read(s, lba, nb_sectors, 2048);
989 }
990
991 static void cmd_read_cd(IDEState *s, uint8_t* buf)
992 {
993 int nb_sectors, lba, transfer_request;
994
995 nb_sectors = (buf[6] << 16) | (buf[7] << 8) | buf[8];
996 lba = ldl_be_p(buf + 2);
997
998 if (nb_sectors == 0) {
999 ide_atapi_cmd_ok(s);
1000 return;
1001 }
1002
1003 transfer_request = buf[9] & 0xf8;
1004 if (transfer_request == 0x00) {
1005 /* nothing */
1006 ide_atapi_cmd_ok(s);
1007 return;
1008 }
1009
1010 /* Check validity of BCL before transferring data */
1011 if (!validate_bcl(s)) {
1012 return;
1013 }
1014
1015 switch (transfer_request) {
1016 case 0x10:
1017 /* normal read */
1018 ide_atapi_cmd_read(s, lba, nb_sectors, 2048);
1019 break;
1020 case 0xf8:
1021 /* read all data */
1022 ide_atapi_cmd_read(s, lba, nb_sectors, 2352);
1023 break;
1024 default:
1025 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
1026 ASC_INV_FIELD_IN_CMD_PACKET);
1027 break;
1028 }
1029 }
1030
1031 static void cmd_seek(IDEState *s, uint8_t* buf)
1032 {
1033 unsigned int lba;
1034 uint64_t total_sectors = s->nb_sectors >> 2;
1035
1036 lba = ldl_be_p(buf + 2);
1037 if (lba >= total_sectors) {
1038 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_LOGICAL_BLOCK_OOR);
1039 return;
1040 }
1041
1042 ide_atapi_cmd_ok(s);
1043 }
1044
1045 static void cmd_start_stop_unit(IDEState *s, uint8_t* buf)
1046 {
1047 int sense;
1048 bool start = buf[4] & 1;
1049 bool loej = buf[4] & 2; /* load on start, eject on !start */
1050 int pwrcnd = buf[4] & 0xf0;
1051
1052 if (pwrcnd) {
1053 /* eject/load only happens for power condition == 0 */
1054 ide_atapi_cmd_ok(s);
1055 return;
1056 }
1057
1058 if (loej) {
1059 if (!start && !s->tray_open && s->tray_locked) {
1060 sense = blk_is_inserted(s->blk)
1061 ? NOT_READY : ILLEGAL_REQUEST;
1062 ide_atapi_cmd_error(s, sense, ASC_MEDIA_REMOVAL_PREVENTED);
1063 return;
1064 }
1065
1066 if (s->tray_open != !start) {
1067 blk_eject(s->blk, !start);
1068 s->tray_open = !start;
1069 }
1070 }
1071
1072 ide_atapi_cmd_ok(s);
1073 }
1074
1075 static void cmd_mechanism_status(IDEState *s, uint8_t* buf)
1076 {
1077 int max_len = lduw_be_p(buf + 8);
1078
1079 stw_be_p(buf, 0);
1080 /* no current LBA */
1081 buf[2] = 0;
1082 buf[3] = 0;
1083 buf[4] = 0;
1084 buf[5] = 1;
1085 stw_be_p(buf + 6, 0);
1086 ide_atapi_cmd_reply(s, 8, max_len);
1087 }
1088
1089 static void cmd_read_toc_pma_atip(IDEState *s, uint8_t* buf)
1090 {
1091 int format, msf, start_track, len;
1092 int max_len;
1093 uint64_t total_sectors = s->nb_sectors >> 2;
1094
1095 max_len = lduw_be_p(buf + 7);
1096 format = buf[9] >> 6;
1097 msf = (buf[1] >> 1) & 1;
1098 start_track = buf[6];
1099
1100 switch(format) {
1101 case 0:
1102 len = cdrom_read_toc(total_sectors, buf, msf, start_track);
1103 if (len < 0)
1104 goto error_cmd;
1105 ide_atapi_cmd_reply(s, len, max_len);
1106 break;
1107 case 1:
1108 /* multi session : only a single session defined */
1109 memset(buf, 0, 12);
1110 buf[1] = 0x0a;
1111 buf[2] = 0x01;
1112 buf[3] = 0x01;
1113 ide_atapi_cmd_reply(s, 12, max_len);
1114 break;
1115 case 2:
1116 len = cdrom_read_toc_raw(total_sectors, buf, msf, start_track);
1117 if (len < 0)
1118 goto error_cmd;
1119 ide_atapi_cmd_reply(s, len, max_len);
1120 break;
1121 default:
1122 error_cmd:
1123 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
1124 ASC_INV_FIELD_IN_CMD_PACKET);
1125 }
1126 }
1127
1128 static void cmd_read_cdvd_capacity(IDEState *s, uint8_t* buf)
1129 {
1130 uint64_t total_sectors = s->nb_sectors >> 2;
1131
1132 /* NOTE: it is really the number of sectors minus 1 */
1133 stl_be_p(buf, total_sectors - 1);
1134 stl_be_p(buf + 4, 2048);
1135 ide_atapi_cmd_reply(s, 8, 8);
1136 }
1137
1138 static void cmd_read_disc_information(IDEState *s, uint8_t* buf)
1139 {
1140 uint8_t type = buf[1] & 7;
1141 uint32_t max_len = lduw_be_p(buf + 7);
1142
1143 /* Types 1/2 are only defined for Blu-Ray. */
1144 if (type != 0) {
1145 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
1146 ASC_INV_FIELD_IN_CMD_PACKET);
1147 return;
1148 }
1149
1150 memset(buf, 0, 34);
1151 buf[1] = 32;
1152 buf[2] = 0xe; /* last session complete, disc finalized */
1153 buf[3] = 1; /* first track on disc */
1154 buf[4] = 1; /* # of sessions */
1155 buf[5] = 1; /* first track of last session */
1156 buf[6] = 1; /* last track of last session */
1157 buf[7] = 0x20; /* unrestricted use */
1158 buf[8] = 0x00; /* CD-ROM or DVD-ROM */
1159 /* 9-10-11: most significant byte corresponding bytes 4-5-6 */
1160 /* 12-23: not meaningful for CD-ROM or DVD-ROM */
1161 /* 24-31: disc bar code */
1162 /* 32: disc application code */
1163 /* 33: number of OPC tables */
1164
1165 ide_atapi_cmd_reply(s, 34, max_len);
1166 }
1167
1168 static void cmd_read_dvd_structure(IDEState *s, uint8_t* buf)
1169 {
1170 int max_len;
1171 int media = buf[1];
1172 int format = buf[7];
1173 int ret;
1174
1175 max_len = lduw_be_p(buf + 8);
1176
1177 if (format < 0xff) {
1178 if (media_is_cd(s)) {
1179 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
1180 ASC_INCOMPATIBLE_FORMAT);
1181 return;
1182 } else if (!media_present(s)) {
1183 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
1184 ASC_INV_FIELD_IN_CMD_PACKET);
1185 return;
1186 }
1187 }
1188
1189 memset(buf, 0, max_len > IDE_DMA_BUF_SECTORS * BDRV_SECTOR_SIZE + 4 ?
1190 IDE_DMA_BUF_SECTORS * BDRV_SECTOR_SIZE + 4 : max_len);
1191
1192 switch (format) {
1193 case 0x00 ... 0x7f:
1194 case 0xff:
1195 if (media == 0) {
1196 ret = ide_dvd_read_structure(s, format, buf, buf);
1197
1198 if (ret < 0) {
1199 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, -ret);
1200 } else {
1201 ide_atapi_cmd_reply(s, ret, max_len);
1202 }
1203
1204 break;
1205 }
1206 /* TODO: BD support, fall through for now */
1207
1208 /* Generic disk structures */
1209 case 0x80: /* TODO: AACS volume identifier */
1210 case 0x81: /* TODO: AACS media serial number */
1211 case 0x82: /* TODO: AACS media identifier */
1212 case 0x83: /* TODO: AACS media key block */
1213 case 0x90: /* TODO: List of recognized format layers */
1214 case 0xc0: /* TODO: Write protection status */
1215 default:
1216 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
1217 ASC_INV_FIELD_IN_CMD_PACKET);
1218 break;
1219 }
1220 }
1221
1222 static void cmd_set_speed(IDEState *s, uint8_t* buf)
1223 {
1224 ide_atapi_cmd_ok(s);
1225 }
1226
1227 enum {
1228 /*
1229 * Only commands flagged as ALLOW_UA are allowed to run under a
1230 * unit attention condition. (See MMC-5, section 4.1.6.1)
1231 */
1232 ALLOW_UA = 0x01,
1233
1234 /*
1235 * Commands flagged with CHECK_READY can only execute if a medium is present.
1236 * Otherwise they report the Not Ready Condition. (See MMC-5, section
1237 * 4.1.8)
1238 */
1239 CHECK_READY = 0x02,
1240
1241 /*
1242 * Commands flagged with NONDATA do not in any circumstances return
1243 * any data via ide_atapi_cmd_reply. These commands are exempt from
1244 * the normal byte_count_limit constraints.
1245 * See ATA8-ACS3 "7.21.5 Byte Count Limit"
1246 */
1247 NONDATA = 0x04,
1248
1249 /*
1250 * CONDDATA implies a command that transfers data only conditionally based
1251 * on the presence of suboptions. It should be exempt from the BCL check at
1252 * command validation time, but it needs to be checked at the command
1253 * handler level instead.
1254 */
1255 CONDDATA = 0x08,
1256 };
1257
1258 static const struct AtapiCmd {
1259 void (*handler)(IDEState *s, uint8_t *buf);
1260 int flags;
1261 } atapi_cmd_table[0x100] = {
1262 [ 0x00 ] = { cmd_test_unit_ready, CHECK_READY | NONDATA },
1263 [ 0x03 ] = { cmd_request_sense, ALLOW_UA },
1264 [ 0x12 ] = { cmd_inquiry, ALLOW_UA },
1265 [ 0x1b ] = { cmd_start_stop_unit, NONDATA }, /* [1] */
1266 [ 0x1e ] = { cmd_prevent_allow_medium_removal, NONDATA },
1267 [ 0x25 ] = { cmd_read_cdvd_capacity, CHECK_READY },
1268 [ 0x28 ] = { cmd_read, /* (10) */ CHECK_READY },
1269 [ 0x2b ] = { cmd_seek, CHECK_READY | NONDATA },
1270 [ 0x43 ] = { cmd_read_toc_pma_atip, CHECK_READY },
1271 [ 0x46 ] = { cmd_get_configuration, ALLOW_UA },
1272 [ 0x4a ] = { cmd_get_event_status_notification, ALLOW_UA },
1273 [ 0x51 ] = { cmd_read_disc_information, CHECK_READY },
1274 [ 0x5a ] = { cmd_mode_sense, /* (10) */ 0 },
1275 [ 0xa8 ] = { cmd_read, /* (12) */ CHECK_READY },
1276 [ 0xad ] = { cmd_read_dvd_structure, CHECK_READY },
1277 [ 0xbb ] = { cmd_set_speed, NONDATA },
1278 [ 0xbd ] = { cmd_mechanism_status, 0 },
1279 [ 0xbe ] = { cmd_read_cd, CHECK_READY | CONDDATA },
1280 /* [1] handler detects and reports not ready condition itself */
1281 };
1282
1283 void ide_atapi_cmd(IDEState *s)
1284 {
1285 uint8_t *buf = s->io_buffer;
1286 const struct AtapiCmd *cmd = &atapi_cmd_table[s->io_buffer[0]];
1287
1288 trace_ide_atapi_cmd(s, s->io_buffer[0]);
1289
1290 if (trace_event_get_state_backends(TRACE_IDE_ATAPI_CMD_PACKET)) {
1291 /* Each pretty-printed byte needs two bytes and a space; */
1292 char *ppacket = g_malloc(ATAPI_PACKET_SIZE * 3 + 1);
1293 int i;
1294 for (i = 0; i < ATAPI_PACKET_SIZE; i++) {
1295 sprintf(ppacket + (i * 3), "%02x ", buf[i]);
1296 }
1297 trace_ide_atapi_cmd_packet(s, s->lcyl | (s->hcyl << 8), ppacket);
1298 g_free(ppacket);
1299 }
1300
1301 /*
1302 * If there's a UNIT_ATTENTION condition pending, only command flagged with
1303 * ALLOW_UA are allowed to complete. with other commands getting a CHECK
1304 * condition response unless a higher priority status, defined by the drive
1305 * here, is pending.
1306 */
1307 if (s->sense_key == UNIT_ATTENTION && !(cmd->flags & ALLOW_UA)) {
1308 ide_atapi_cmd_check_status(s);
1309 return;
1310 }
1311 /*
1312 * When a CD gets changed, we have to report an ejected state and
1313 * then a loaded state to guests so that they detect tray
1314 * open/close and media change events. Guests that do not use
1315 * GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close
1316 * states rely on this behavior.
1317 */
1318 if (!(cmd->flags & ALLOW_UA) &&
1319 !s->tray_open && blk_is_inserted(s->blk) && s->cdrom_changed) {
1320
1321 if (s->cdrom_changed == 1) {
1322 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT);
1323 s->cdrom_changed = 2;
1324 } else {
1325 ide_atapi_cmd_error(s, UNIT_ATTENTION, ASC_MEDIUM_MAY_HAVE_CHANGED);
1326 s->cdrom_changed = 0;
1327 }
1328
1329 return;
1330 }
1331
1332 /* Report a Not Ready condition if appropriate for the command */
1333 if ((cmd->flags & CHECK_READY) &&
1334 (!media_present(s) || !blk_is_inserted(s->blk)))
1335 {
1336 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT);
1337 return;
1338 }
1339
1340 /* Commands that don't transfer DATA permit the byte_count_limit to be 0.
1341 * If this is a data-transferring PIO command and BCL is 0,
1342 * we abort at the /ATA/ level, not the ATAPI level.
1343 * See ATA8 ACS3 section 7.17.6.49 and 7.21.5 */
1344 if (cmd->handler && !(cmd->flags & (NONDATA | CONDDATA))) {
1345 if (!validate_bcl(s)) {
1346 return;
1347 }
1348 }
1349
1350 /* Execute the command */
1351 if (cmd->handler) {
1352 cmd->handler(s, buf);
1353 return;
1354 }
1355
1356 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_ILLEGAL_OPCODE);
1357 }