Update version for v6.2.0-rc4 release
[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 assert(size <= s->io_buffer_total_len);
280 assert(s->io_buffer_index <= s->io_buffer_total_len);
281
282 /* Some adapters process PIO data right away. In that case, we need
283 * to avoid mutual recursion between ide_transfer_start
284 * and ide_atapi_cmd_reply_end.
285 */
286 if (!ide_transfer_start_norecurse(s,
287 s->io_buffer + s->io_buffer_index - size,
288 size, ide_atapi_cmd_reply_end)) {
289 return;
290 }
291 }
292
293 /* end of transfer */
294 trace_ide_atapi_cmd_reply_end_eot(s, s->status);
295 ide_atapi_cmd_ok(s);
296 ide_set_irq(s->bus);
297 }
298
299 /* send a reply of 'size' bytes in s->io_buffer to an ATAPI command */
300 static void ide_atapi_cmd_reply(IDEState *s, int size, int max_size)
301 {
302 if (size > max_size)
303 size = max_size;
304 s->lba = -1; /* no sector read */
305 s->packet_transfer_size = size;
306 s->io_buffer_size = size; /* dma: send the reply data as one chunk */
307 s->elementary_transfer_size = 0;
308
309 if (s->atapi_dma) {
310 block_acct_start(blk_get_stats(s->blk), &s->acct, size,
311 BLOCK_ACCT_READ);
312 s->status = READY_STAT | SEEK_STAT | DRQ_STAT;
313 ide_start_dma(s, ide_atapi_cmd_read_dma_cb);
314 } else {
315 s->status = READY_STAT | SEEK_STAT;
316 s->io_buffer_index = 0;
317 ide_atapi_cmd_reply_end(s);
318 }
319 }
320
321 /* start a CD-CDROM read command */
322 static void ide_atapi_cmd_read_pio(IDEState *s, int lba, int nb_sectors,
323 int sector_size)
324 {
325 assert(0 <= lba && lba < (s->nb_sectors >> 2));
326
327 s->lba = lba;
328 s->packet_transfer_size = nb_sectors * sector_size;
329 s->elementary_transfer_size = 0;
330 s->io_buffer_index = sector_size;
331 s->cd_sector_size = sector_size;
332
333 ide_atapi_cmd_reply_end(s);
334 }
335
336 static void ide_atapi_cmd_check_status(IDEState *s)
337 {
338 trace_ide_atapi_cmd_check_status(s);
339 s->error = MC_ERR | (UNIT_ATTENTION << 4);
340 s->status = ERR_STAT;
341 s->nsector = 0;
342 ide_set_irq(s->bus);
343 }
344 /* ATAPI DMA support */
345
346 static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret)
347 {
348 IDEState *s = opaque;
349 int data_offset, n;
350
351 if (ret < 0) {
352 if (ide_handle_rw_error(s, -ret, ide_dma_cmd_to_retry(s->dma_cmd))) {
353 if (s->bus->error_status) {
354 s->bus->dma->aiocb = NULL;
355 return;
356 }
357 goto eot;
358 }
359 }
360
361 if (s->io_buffer_size > 0) {
362 /*
363 * For a cdrom read sector command (s->lba != -1),
364 * adjust the lba for the next s->io_buffer_size chunk
365 * and dma the current chunk.
366 * For a command != read (s->lba == -1), just transfer
367 * the reply data.
368 */
369 if (s->lba != -1) {
370 if (s->cd_sector_size == 2352) {
371 n = 1;
372 cd_data_to_raw(s->io_buffer, s->lba);
373 } else {
374 n = s->io_buffer_size >> 11;
375 }
376 s->lba += n;
377 }
378 s->packet_transfer_size -= s->io_buffer_size;
379 if (s->bus->dma->ops->rw_buf(s->bus->dma, 1) == 0)
380 goto eot;
381 }
382
383 if (s->packet_transfer_size <= 0) {
384 s->status = READY_STAT | SEEK_STAT;
385 s->nsector = (s->nsector & ~7) | ATAPI_INT_REASON_IO | ATAPI_INT_REASON_CD;
386 ide_set_irq(s->bus);
387 goto eot;
388 }
389
390 s->io_buffer_index = 0;
391 if (s->cd_sector_size == 2352) {
392 n = 1;
393 s->io_buffer_size = s->cd_sector_size;
394 data_offset = 16;
395 } else {
396 n = s->packet_transfer_size >> 11;
397 if (n > (IDE_DMA_BUF_SECTORS / 4))
398 n = (IDE_DMA_BUF_SECTORS / 4);
399 s->io_buffer_size = n * 2048;
400 data_offset = 0;
401 }
402 trace_ide_atapi_cmd_read_dma_cb_aio(s, s->lba, n);
403 qemu_iovec_init_buf(&s->bus->dma->qiov, s->io_buffer + data_offset,
404 n * ATAPI_SECTOR_SIZE);
405
406 s->bus->dma->aiocb = ide_buffered_readv(s, (int64_t)s->lba << 2,
407 &s->bus->dma->qiov, n * 4,
408 ide_atapi_cmd_read_dma_cb, s);
409 return;
410
411 eot:
412 if (ret < 0) {
413 block_acct_failed(blk_get_stats(s->blk), &s->acct);
414 } else {
415 block_acct_done(blk_get_stats(s->blk), &s->acct);
416 }
417 ide_set_inactive(s, false);
418 }
419
420 /* start a CD-CDROM read command with DMA */
421 /* XXX: test if DMA is available */
422 static void ide_atapi_cmd_read_dma(IDEState *s, int lba, int nb_sectors,
423 int sector_size)
424 {
425 assert(0 <= lba && lba < (s->nb_sectors >> 2));
426
427 s->lba = lba;
428 s->packet_transfer_size = nb_sectors * sector_size;
429 s->io_buffer_size = 0;
430 s->cd_sector_size = sector_size;
431
432 block_acct_start(blk_get_stats(s->blk), &s->acct, s->packet_transfer_size,
433 BLOCK_ACCT_READ);
434
435 /* XXX: check if BUSY_STAT should be set */
436 s->status = READY_STAT | SEEK_STAT | DRQ_STAT | BUSY_STAT;
437 ide_start_dma(s, ide_atapi_cmd_read_dma_cb);
438 }
439
440 static void ide_atapi_cmd_read(IDEState *s, int lba, int nb_sectors,
441 int sector_size)
442 {
443 trace_ide_atapi_cmd_read(s, s->atapi_dma ? "dma" : "pio",
444 lba, nb_sectors);
445 if (s->atapi_dma) {
446 ide_atapi_cmd_read_dma(s, lba, nb_sectors, sector_size);
447 } else {
448 ide_atapi_cmd_read_pio(s, lba, nb_sectors, sector_size);
449 }
450 }
451
452 void ide_atapi_dma_restart(IDEState *s)
453 {
454 /*
455 * At this point we can just re-evaluate the packet command and start over.
456 * The presence of ->dma_cb callback in the pre_save ensures that the packet
457 * command has been completely sent and we can safely restart command.
458 */
459 s->unit = s->bus->retry_unit;
460 s->bus->dma->ops->restart_dma(s->bus->dma);
461 ide_atapi_cmd(s);
462 }
463
464 static inline uint8_t ide_atapi_set_profile(uint8_t *buf, uint8_t *index,
465 uint16_t profile)
466 {
467 uint8_t *buf_profile = buf + 12; /* start of profiles */
468
469 buf_profile += ((*index) * 4); /* start of indexed profile */
470 stw_be_p(buf_profile, profile);
471 buf_profile[2] = ((buf_profile[0] == buf[6]) && (buf_profile[1] == buf[7]));
472
473 /* each profile adds 4 bytes to the response */
474 (*index)++;
475 buf[11] += 4; /* Additional Length */
476
477 return 4;
478 }
479
480 static int ide_dvd_read_structure(IDEState *s, int format,
481 const uint8_t *packet, uint8_t *buf)
482 {
483 switch (format) {
484 case 0x0: /* Physical format information */
485 {
486 int layer = packet[6];
487 uint64_t total_sectors;
488
489 if (layer != 0)
490 return -ASC_INV_FIELD_IN_CMD_PACKET;
491
492 total_sectors = s->nb_sectors >> 2;
493 if (total_sectors == 0) {
494 return -ASC_MEDIUM_NOT_PRESENT;
495 }
496
497 buf[4] = 1; /* DVD-ROM, part version 1 */
498 buf[5] = 0xf; /* 120mm disc, minimum rate unspecified */
499 buf[6] = 1; /* one layer, read-only (per MMC-2 spec) */
500 buf[7] = 0; /* default densities */
501
502 /* FIXME: 0x30000 per spec? */
503 stl_be_p(buf + 8, 0); /* start sector */
504 stl_be_p(buf + 12, total_sectors - 1); /* end sector */
505 stl_be_p(buf + 16, total_sectors - 1); /* l0 end sector */
506
507 /* Size of buffer, not including 2 byte size field */
508 stw_be_p(buf, 2048 + 2);
509
510 /* 2k data + 4 byte header */
511 return (2048 + 4);
512 }
513
514 case 0x01: /* DVD copyright information */
515 buf[4] = 0; /* no copyright data */
516 buf[5] = 0; /* no region restrictions */
517
518 /* Size of buffer, not including 2 byte size field */
519 stw_be_p(buf, 4 + 2);
520
521 /* 4 byte header + 4 byte data */
522 return (4 + 4);
523
524 case 0x03: /* BCA information - invalid field for no BCA info */
525 return -ASC_INV_FIELD_IN_CMD_PACKET;
526
527 case 0x04: /* DVD disc manufacturing information */
528 /* Size of buffer, not including 2 byte size field */
529 stw_be_p(buf, 2048 + 2);
530
531 /* 2k data + 4 byte header */
532 return (2048 + 4);
533
534 case 0xff:
535 /*
536 * This lists all the command capabilities above. Add new ones
537 * in order and update the length and buffer return values.
538 */
539
540 buf[4] = 0x00; /* Physical format */
541 buf[5] = 0x40; /* Not writable, is readable */
542 stw_be_p(buf + 6, 2048 + 4);
543
544 buf[8] = 0x01; /* Copyright info */
545 buf[9] = 0x40; /* Not writable, is readable */
546 stw_be_p(buf + 10, 4 + 4);
547
548 buf[12] = 0x03; /* BCA info */
549 buf[13] = 0x40; /* Not writable, is readable */
550 stw_be_p(buf + 14, 188 + 4);
551
552 buf[16] = 0x04; /* Manufacturing info */
553 buf[17] = 0x40; /* Not writable, is readable */
554 stw_be_p(buf + 18, 2048 + 4);
555
556 /* Size of buffer, not including 2 byte size field */
557 stw_be_p(buf, 16 + 2);
558
559 /* data written + 4 byte header */
560 return (16 + 4);
561
562 default: /* TODO: formats beyond DVD-ROM requires */
563 return -ASC_INV_FIELD_IN_CMD_PACKET;
564 }
565 }
566
567 static unsigned int event_status_media(IDEState *s,
568 uint8_t *buf)
569 {
570 uint8_t event_code, media_status;
571
572 media_status = 0;
573 if (s->tray_open) {
574 media_status = MS_TRAY_OPEN;
575 } else if (blk_is_inserted(s->blk)) {
576 media_status = MS_MEDIA_PRESENT;
577 }
578
579 /* Event notification descriptor */
580 event_code = MEC_NO_CHANGE;
581 if (media_status != MS_TRAY_OPEN) {
582 if (s->events.new_media) {
583 event_code = MEC_NEW_MEDIA;
584 s->events.new_media = false;
585 } else if (s->events.eject_request) {
586 event_code = MEC_EJECT_REQUESTED;
587 s->events.eject_request = false;
588 }
589 }
590
591 buf[4] = event_code;
592 buf[5] = media_status;
593
594 /* These fields are reserved, just clear them. */
595 buf[6] = 0;
596 buf[7] = 0;
597
598 return 8; /* We wrote to 4 extra bytes from the header */
599 }
600
601 /*
602 * Before transferring data or otherwise signalling acceptance of a command
603 * marked CONDDATA, we must check the validity of the byte_count_limit.
604 */
605 static bool validate_bcl(IDEState *s)
606 {
607 /* TODO: Check IDENTIFY data word 125 for defacult BCL (currently 0) */
608 if (s->atapi_dma || atapi_byte_count_limit(s)) {
609 return true;
610 }
611
612 /* TODO: Move abort back into core.c and introduce proper error flow between
613 * ATAPI layer and IDE core layer */
614 ide_abort_command(s);
615 return false;
616 }
617
618 static void cmd_get_event_status_notification(IDEState *s,
619 uint8_t *buf)
620 {
621 const uint8_t *packet = buf;
622
623 struct {
624 uint8_t opcode;
625 uint8_t polled; /* lsb bit is polled; others are reserved */
626 uint8_t reserved2[2];
627 uint8_t class;
628 uint8_t reserved3[2];
629 uint16_t len;
630 uint8_t control;
631 } QEMU_PACKED *gesn_cdb;
632
633 struct {
634 uint16_t len;
635 uint8_t notification_class;
636 uint8_t supported_events;
637 } QEMU_PACKED *gesn_event_header;
638 unsigned int max_len, used_len;
639
640 gesn_cdb = (void *)packet;
641 gesn_event_header = (void *)buf;
642
643 max_len = be16_to_cpu(gesn_cdb->len);
644
645 /* It is fine by the MMC spec to not support async mode operations */
646 if (!(gesn_cdb->polled & 0x01)) { /* asynchronous mode */
647 /* Only polling is supported, asynchronous mode is not. */
648 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
649 ASC_INV_FIELD_IN_CMD_PACKET);
650 return;
651 }
652
653 /* polling mode operation */
654
655 /*
656 * These are the supported events.
657 *
658 * We currently only support requests of the 'media' type.
659 * Notification class requests and supported event classes are bitmasks,
660 * but they are build from the same values as the "notification class"
661 * field.
662 */
663 gesn_event_header->supported_events = 1 << GESN_MEDIA;
664
665 /*
666 * We use |= below to set the class field; other bits in this byte
667 * are reserved now but this is useful to do if we have to use the
668 * reserved fields later.
669 */
670 gesn_event_header->notification_class = 0;
671
672 /*
673 * Responses to requests are to be based on request priority. The
674 * notification_class_request_type enum above specifies the
675 * priority: upper elements are higher prio than lower ones.
676 */
677 if (gesn_cdb->class & (1 << GESN_MEDIA)) {
678 gesn_event_header->notification_class |= GESN_MEDIA;
679 used_len = event_status_media(s, buf);
680 } else {
681 gesn_event_header->notification_class = 0x80; /* No event available */
682 used_len = sizeof(*gesn_event_header);
683 }
684 gesn_event_header->len = cpu_to_be16(used_len
685 - sizeof(*gesn_event_header));
686 ide_atapi_cmd_reply(s, used_len, max_len);
687 }
688
689 static void cmd_request_sense(IDEState *s, uint8_t *buf)
690 {
691 int max_len = buf[4];
692
693 memset(buf, 0, 18);
694 buf[0] = 0x70 | (1 << 7);
695 buf[2] = s->sense_key;
696 buf[7] = 10;
697 buf[12] = s->asc;
698
699 if (s->sense_key == UNIT_ATTENTION) {
700 s->sense_key = NO_SENSE;
701 }
702
703 ide_atapi_cmd_reply(s, 18, max_len);
704 }
705
706 static void cmd_inquiry(IDEState *s, uint8_t *buf)
707 {
708 uint8_t page_code = buf[2];
709 int max_len = buf[4];
710
711 unsigned idx = 0;
712 unsigned size_idx;
713 unsigned preamble_len;
714
715 /* If the EVPD (Enable Vital Product Data) bit is set in byte 1,
716 * we are being asked for a specific page of info indicated by byte 2. */
717 if (buf[1] & 0x01) {
718 preamble_len = 4;
719 size_idx = 3;
720
721 buf[idx++] = 0x05; /* CD-ROM */
722 buf[idx++] = page_code; /* Page Code */
723 buf[idx++] = 0x00; /* reserved */
724 idx++; /* length (set later) */
725
726 switch (page_code) {
727 case 0x00:
728 /* Supported Pages: List of supported VPD responses. */
729 buf[idx++] = 0x00; /* 0x00: Supported Pages, and: */
730 buf[idx++] = 0x83; /* 0x83: Device Identification. */
731 break;
732
733 case 0x83:
734 /* Device Identification. Each entry is optional, but the entries
735 * included here are modeled after libata's VPD responses.
736 * If the response is given, at least one entry must be present. */
737
738 /* Entry 1: Serial */
739 if (idx + 24 > max_len) {
740 /* Not enough room for even the first entry: */
741 /* 4 byte header + 20 byte string */
742 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
743 ASC_DATA_PHASE_ERROR);
744 return;
745 }
746 buf[idx++] = 0x02; /* Ascii */
747 buf[idx++] = 0x00; /* Vendor Specific */
748 buf[idx++] = 0x00;
749 buf[idx++] = 20; /* Remaining length */
750 padstr8(buf + idx, 20, s->drive_serial_str);
751 idx += 20;
752
753 /* Entry 2: Drive Model and Serial */
754 if (idx + 72 > max_len) {
755 /* 4 (header) + 8 (vendor) + 60 (model & serial) */
756 goto out;
757 }
758 buf[idx++] = 0x02; /* Ascii */
759 buf[idx++] = 0x01; /* T10 Vendor */
760 buf[idx++] = 0x00;
761 buf[idx++] = 68;
762 padstr8(buf + idx, 8, "ATA"); /* Generic T10 vendor */
763 idx += 8;
764 padstr8(buf + idx, 40, s->drive_model_str);
765 idx += 40;
766 padstr8(buf + idx, 20, s->drive_serial_str);
767 idx += 20;
768
769 /* Entry 3: WWN */
770 if (s->wwn && (idx + 12 <= max_len)) {
771 /* 4 byte header + 8 byte wwn */
772 buf[idx++] = 0x01; /* Binary */
773 buf[idx++] = 0x03; /* NAA */
774 buf[idx++] = 0x00;
775 buf[idx++] = 0x08;
776 stq_be_p(&buf[idx], s->wwn);
777 idx += 8;
778 }
779 break;
780
781 default:
782 /* SPC-3, revision 23 sec. 6.4 */
783 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
784 ASC_INV_FIELD_IN_CMD_PACKET);
785 return;
786 }
787 } else {
788 preamble_len = 5;
789 size_idx = 4;
790
791 buf[0] = 0x05; /* CD-ROM */
792 buf[1] = 0x80; /* removable */
793 buf[2] = 0x00; /* ISO */
794 buf[3] = 0x21; /* ATAPI-2 (XXX: put ATAPI-4 ?) */
795 /* buf[size_idx] set below. */
796 buf[5] = 0; /* reserved */
797 buf[6] = 0; /* reserved */
798 buf[7] = 0; /* reserved */
799 padstr8(buf + 8, 8, "QEMU");
800 padstr8(buf + 16, 16, "QEMU DVD-ROM");
801 padstr8(buf + 32, 4, s->version);
802 idx = 36;
803 }
804
805 out:
806 buf[size_idx] = idx - preamble_len;
807 ide_atapi_cmd_reply(s, idx, max_len);
808 }
809
810 static void cmd_get_configuration(IDEState *s, uint8_t *buf)
811 {
812 uint32_t len;
813 uint8_t index = 0;
814 int max_len;
815
816 /* only feature 0 is supported */
817 if (buf[2] != 0 || buf[3] != 0) {
818 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
819 ASC_INV_FIELD_IN_CMD_PACKET);
820 return;
821 }
822
823 /* XXX: could result in alignment problems in some architectures */
824 max_len = lduw_be_p(buf + 7);
825
826 /*
827 * XXX: avoid overflow for io_buffer if max_len is bigger than
828 * the size of that buffer (dimensioned to max number of
829 * sectors to transfer at once)
830 *
831 * Only a problem if the feature/profiles grow.
832 */
833 if (max_len > BDRV_SECTOR_SIZE) {
834 /* XXX: assume 1 sector */
835 max_len = BDRV_SECTOR_SIZE;
836 }
837
838 memset(buf, 0, max_len);
839 /*
840 * the number of sectors from the media tells us which profile
841 * to use as current. 0 means there is no media
842 */
843 if (media_is_dvd(s)) {
844 stw_be_p(buf + 6, MMC_PROFILE_DVD_ROM);
845 } else if (media_is_cd(s)) {
846 stw_be_p(buf + 6, MMC_PROFILE_CD_ROM);
847 }
848
849 buf[10] = 0x02 | 0x01; /* persistent and current */
850 len = 12; /* headers: 8 + 4 */
851 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_DVD_ROM);
852 len += ide_atapi_set_profile(buf, &index, MMC_PROFILE_CD_ROM);
853 stl_be_p(buf, len - 4); /* data length */
854
855 ide_atapi_cmd_reply(s, len, max_len);
856 }
857
858 static void cmd_mode_sense(IDEState *s, uint8_t *buf)
859 {
860 int action, code;
861 int max_len;
862
863 max_len = lduw_be_p(buf + 7);
864 action = buf[2] >> 6;
865 code = buf[2] & 0x3f;
866
867 switch(action) {
868 case 0: /* current values */
869 switch(code) {
870 case MODE_PAGE_R_W_ERROR: /* error recovery */
871 stw_be_p(&buf[0], 16 - 2);
872 buf[2] = 0x70;
873 buf[3] = 0;
874 buf[4] = 0;
875 buf[5] = 0;
876 buf[6] = 0;
877 buf[7] = 0;
878
879 buf[8] = MODE_PAGE_R_W_ERROR;
880 buf[9] = 16 - 10;
881 buf[10] = 0x00;
882 buf[11] = 0x05;
883 buf[12] = 0x00;
884 buf[13] = 0x00;
885 buf[14] = 0x00;
886 buf[15] = 0x00;
887 ide_atapi_cmd_reply(s, 16, max_len);
888 break;
889 case MODE_PAGE_AUDIO_CTL:
890 stw_be_p(&buf[0], 24 - 2);
891 buf[2] = 0x70;
892 buf[3] = 0;
893 buf[4] = 0;
894 buf[5] = 0;
895 buf[6] = 0;
896 buf[7] = 0;
897
898 buf[8] = MODE_PAGE_AUDIO_CTL;
899 buf[9] = 24 - 10;
900 /* Fill with CDROM audio volume */
901 buf[17] = 0;
902 buf[19] = 0;
903 buf[21] = 0;
904 buf[23] = 0;
905
906 ide_atapi_cmd_reply(s, 24, max_len);
907 break;
908 case MODE_PAGE_CAPABILITIES:
909 stw_be_p(&buf[0], 30 - 2);
910 buf[2] = 0x70;
911 buf[3] = 0;
912 buf[4] = 0;
913 buf[5] = 0;
914 buf[6] = 0;
915 buf[7] = 0;
916
917 buf[8] = MODE_PAGE_CAPABILITIES;
918 buf[9] = 30 - 10;
919 buf[10] = 0x3b; /* read CDR/CDRW/DVDROM/DVDR/DVDRAM */
920 buf[11] = 0x00;
921
922 /* Claim PLAY_AUDIO capability (0x01) since some Linux
923 code checks for this to automount media. */
924 buf[12] = 0x71;
925 buf[13] = 3 << 5;
926 buf[14] = (1 << 0) | (1 << 3) | (1 << 5);
927 if (s->tray_locked) {
928 buf[14] |= 1 << 1;
929 }
930 buf[15] = 0x00; /* No volume & mute control, no changer */
931 stw_be_p(&buf[16], 704); /* 4x read speed */
932 buf[18] = 0; /* Two volume levels */
933 buf[19] = 2;
934 stw_be_p(&buf[20], 512); /* 512k buffer */
935 stw_be_p(&buf[22], 704); /* 4x read speed current */
936 buf[24] = 0;
937 buf[25] = 0;
938 buf[26] = 0;
939 buf[27] = 0;
940 buf[28] = 0;
941 buf[29] = 0;
942 ide_atapi_cmd_reply(s, 30, max_len);
943 break;
944 default:
945 goto error_cmd;
946 }
947 break;
948 case 1: /* changeable values */
949 goto error_cmd;
950 case 2: /* default values */
951 goto error_cmd;
952 default:
953 case 3: /* saved values */
954 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
955 ASC_SAVING_PARAMETERS_NOT_SUPPORTED);
956 break;
957 }
958 return;
959
960 error_cmd:
961 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_INV_FIELD_IN_CMD_PACKET);
962 }
963
964 static void cmd_test_unit_ready(IDEState *s, uint8_t *buf)
965 {
966 /* Not Ready Conditions are already handled in ide_atapi_cmd(), so if we
967 * come here, we know that it's ready. */
968 ide_atapi_cmd_ok(s);
969 }
970
971 static void cmd_prevent_allow_medium_removal(IDEState *s, uint8_t* buf)
972 {
973 s->tray_locked = buf[4] & 1;
974 blk_lock_medium(s->blk, buf[4] & 1);
975 ide_atapi_cmd_ok(s);
976 }
977
978 static void cmd_read(IDEState *s, uint8_t* buf)
979 {
980 unsigned int nb_sectors, lba;
981
982 /* Total logical sectors of ATAPI_SECTOR_SIZE(=2048) bytes */
983 uint64_t total_sectors = s->nb_sectors >> 2;
984
985 if (buf[0] == GPCMD_READ_10) {
986 nb_sectors = lduw_be_p(buf + 7);
987 } else {
988 nb_sectors = ldl_be_p(buf + 6);
989 }
990 if (nb_sectors == 0) {
991 ide_atapi_cmd_ok(s);
992 return;
993 }
994
995 lba = ldl_be_p(buf + 2);
996 if (lba >= total_sectors || lba + nb_sectors - 1 >= total_sectors) {
997 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_LOGICAL_BLOCK_OOR);
998 return;
999 }
1000
1001 ide_atapi_cmd_read(s, lba, nb_sectors, 2048);
1002 }
1003
1004 static void cmd_read_cd(IDEState *s, uint8_t* buf)
1005 {
1006 unsigned int nb_sectors, lba, transfer_request;
1007
1008 /* Total logical sectors of ATAPI_SECTOR_SIZE(=2048) bytes */
1009 uint64_t total_sectors = s->nb_sectors >> 2;
1010
1011 nb_sectors = (buf[6] << 16) | (buf[7] << 8) | buf[8];
1012 if (nb_sectors == 0) {
1013 ide_atapi_cmd_ok(s);
1014 return;
1015 }
1016
1017 lba = ldl_be_p(buf + 2);
1018 if (lba >= total_sectors || lba + nb_sectors - 1 >= total_sectors) {
1019 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_LOGICAL_BLOCK_OOR);
1020 return;
1021 }
1022
1023 transfer_request = buf[9] & 0xf8;
1024 if (transfer_request == 0x00) {
1025 /* nothing */
1026 ide_atapi_cmd_ok(s);
1027 return;
1028 }
1029
1030 /* Check validity of BCL before transferring data */
1031 if (!validate_bcl(s)) {
1032 return;
1033 }
1034
1035 switch (transfer_request) {
1036 case 0x10:
1037 /* normal read */
1038 ide_atapi_cmd_read(s, lba, nb_sectors, 2048);
1039 break;
1040 case 0xf8:
1041 /* read all data */
1042 ide_atapi_cmd_read(s, lba, nb_sectors, 2352);
1043 break;
1044 default:
1045 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
1046 ASC_INV_FIELD_IN_CMD_PACKET);
1047 break;
1048 }
1049 }
1050
1051 static void cmd_seek(IDEState *s, uint8_t* buf)
1052 {
1053 unsigned int lba;
1054 uint64_t total_sectors = s->nb_sectors >> 2;
1055
1056 lba = ldl_be_p(buf + 2);
1057 if (lba >= total_sectors) {
1058 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_LOGICAL_BLOCK_OOR);
1059 return;
1060 }
1061
1062 ide_atapi_cmd_ok(s);
1063 }
1064
1065 static void cmd_start_stop_unit(IDEState *s, uint8_t* buf)
1066 {
1067 int sense;
1068 bool start = buf[4] & 1;
1069 bool loej = buf[4] & 2; /* load on start, eject on !start */
1070 int pwrcnd = buf[4] & 0xf0;
1071
1072 if (pwrcnd) {
1073 /* eject/load only happens for power condition == 0 */
1074 ide_atapi_cmd_ok(s);
1075 return;
1076 }
1077
1078 if (loej) {
1079 if (!start && !s->tray_open && s->tray_locked) {
1080 sense = blk_is_inserted(s->blk)
1081 ? NOT_READY : ILLEGAL_REQUEST;
1082 ide_atapi_cmd_error(s, sense, ASC_MEDIA_REMOVAL_PREVENTED);
1083 return;
1084 }
1085
1086 if (s->tray_open != !start) {
1087 blk_eject(s->blk, !start);
1088 s->tray_open = !start;
1089 }
1090 }
1091
1092 ide_atapi_cmd_ok(s);
1093 }
1094
1095 static void cmd_mechanism_status(IDEState *s, uint8_t* buf)
1096 {
1097 int max_len = lduw_be_p(buf + 8);
1098
1099 stw_be_p(buf, 0);
1100 /* no current LBA */
1101 buf[2] = 0;
1102 buf[3] = 0;
1103 buf[4] = 0;
1104 buf[5] = 1;
1105 stw_be_p(buf + 6, 0);
1106 ide_atapi_cmd_reply(s, 8, max_len);
1107 }
1108
1109 static void cmd_read_toc_pma_atip(IDEState *s, uint8_t* buf)
1110 {
1111 int format, msf, start_track, len;
1112 int max_len;
1113 uint64_t total_sectors = s->nb_sectors >> 2;
1114
1115 max_len = lduw_be_p(buf + 7);
1116 format = buf[9] >> 6;
1117 msf = (buf[1] >> 1) & 1;
1118 start_track = buf[6];
1119
1120 switch(format) {
1121 case 0:
1122 len = cdrom_read_toc(total_sectors, buf, msf, start_track);
1123 if (len < 0)
1124 goto error_cmd;
1125 ide_atapi_cmd_reply(s, len, max_len);
1126 break;
1127 case 1:
1128 /* multi session : only a single session defined */
1129 memset(buf, 0, 12);
1130 buf[1] = 0x0a;
1131 buf[2] = 0x01;
1132 buf[3] = 0x01;
1133 ide_atapi_cmd_reply(s, 12, max_len);
1134 break;
1135 case 2:
1136 len = cdrom_read_toc_raw(total_sectors, buf, msf, start_track);
1137 if (len < 0)
1138 goto error_cmd;
1139 ide_atapi_cmd_reply(s, len, max_len);
1140 break;
1141 default:
1142 error_cmd:
1143 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
1144 ASC_INV_FIELD_IN_CMD_PACKET);
1145 }
1146 }
1147
1148 static void cmd_read_cdvd_capacity(IDEState *s, uint8_t* buf)
1149 {
1150 uint64_t total_sectors = s->nb_sectors >> 2;
1151
1152 /* NOTE: it is really the number of sectors minus 1 */
1153 stl_be_p(buf, total_sectors - 1);
1154 stl_be_p(buf + 4, 2048);
1155 ide_atapi_cmd_reply(s, 8, 8);
1156 }
1157
1158 static void cmd_read_disc_information(IDEState *s, uint8_t* buf)
1159 {
1160 uint8_t type = buf[1] & 7;
1161 uint32_t max_len = lduw_be_p(buf + 7);
1162
1163 /* Types 1/2 are only defined for Blu-Ray. */
1164 if (type != 0) {
1165 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
1166 ASC_INV_FIELD_IN_CMD_PACKET);
1167 return;
1168 }
1169
1170 memset(buf, 0, 34);
1171 buf[1] = 32;
1172 buf[2] = 0xe; /* last session complete, disc finalized */
1173 buf[3] = 1; /* first track on disc */
1174 buf[4] = 1; /* # of sessions */
1175 buf[5] = 1; /* first track of last session */
1176 buf[6] = 1; /* last track of last session */
1177 buf[7] = 0x20; /* unrestricted use */
1178 buf[8] = 0x00; /* CD-ROM or DVD-ROM */
1179 /* 9-10-11: most significant byte corresponding bytes 4-5-6 */
1180 /* 12-23: not meaningful for CD-ROM or DVD-ROM */
1181 /* 24-31: disc bar code */
1182 /* 32: disc application code */
1183 /* 33: number of OPC tables */
1184
1185 ide_atapi_cmd_reply(s, 34, max_len);
1186 }
1187
1188 static void cmd_read_dvd_structure(IDEState *s, uint8_t* buf)
1189 {
1190 int max_len;
1191 int media = buf[1];
1192 int format = buf[7];
1193 int ret;
1194
1195 max_len = lduw_be_p(buf + 8);
1196
1197 if (format < 0xff) {
1198 if (media_is_cd(s)) {
1199 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
1200 ASC_INCOMPATIBLE_FORMAT);
1201 return;
1202 } else if (!media_present(s)) {
1203 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
1204 ASC_INV_FIELD_IN_CMD_PACKET);
1205 return;
1206 }
1207 }
1208
1209 memset(buf, 0, max_len > IDE_DMA_BUF_SECTORS * BDRV_SECTOR_SIZE + 4 ?
1210 IDE_DMA_BUF_SECTORS * BDRV_SECTOR_SIZE + 4 : max_len);
1211
1212 switch (format) {
1213 case 0x00 ... 0x7f:
1214 case 0xff:
1215 if (media == 0) {
1216 ret = ide_dvd_read_structure(s, format, buf, buf);
1217
1218 if (ret < 0) {
1219 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, -ret);
1220 } else {
1221 ide_atapi_cmd_reply(s, ret, max_len);
1222 }
1223
1224 break;
1225 }
1226 /* TODO: BD support, fall through for now */
1227
1228 /* Generic disk structures */
1229 case 0x80: /* TODO: AACS volume identifier */
1230 case 0x81: /* TODO: AACS media serial number */
1231 case 0x82: /* TODO: AACS media identifier */
1232 case 0x83: /* TODO: AACS media key block */
1233 case 0x90: /* TODO: List of recognized format layers */
1234 case 0xc0: /* TODO: Write protection status */
1235 default:
1236 ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
1237 ASC_INV_FIELD_IN_CMD_PACKET);
1238 break;
1239 }
1240 }
1241
1242 static void cmd_set_speed(IDEState *s, uint8_t* buf)
1243 {
1244 ide_atapi_cmd_ok(s);
1245 }
1246
1247 enum {
1248 /*
1249 * Only commands flagged as ALLOW_UA are allowed to run under a
1250 * unit attention condition. (See MMC-5, section 4.1.6.1)
1251 */
1252 ALLOW_UA = 0x01,
1253
1254 /*
1255 * Commands flagged with CHECK_READY can only execute if a medium is present.
1256 * Otherwise they report the Not Ready Condition. (See MMC-5, section
1257 * 4.1.8)
1258 */
1259 CHECK_READY = 0x02,
1260
1261 /*
1262 * Commands flagged with NONDATA do not in any circumstances return
1263 * any data via ide_atapi_cmd_reply. These commands are exempt from
1264 * the normal byte_count_limit constraints.
1265 * See ATA8-ACS3 "7.21.5 Byte Count Limit"
1266 */
1267 NONDATA = 0x04,
1268
1269 /*
1270 * CONDDATA implies a command that transfers data only conditionally based
1271 * on the presence of suboptions. It should be exempt from the BCL check at
1272 * command validation time, but it needs to be checked at the command
1273 * handler level instead.
1274 */
1275 CONDDATA = 0x08,
1276 };
1277
1278 static const struct AtapiCmd {
1279 void (*handler)(IDEState *s, uint8_t *buf);
1280 int flags;
1281 } atapi_cmd_table[0x100] = {
1282 [ 0x00 ] = { cmd_test_unit_ready, CHECK_READY | NONDATA },
1283 [ 0x03 ] = { cmd_request_sense, ALLOW_UA },
1284 [ 0x12 ] = { cmd_inquiry, ALLOW_UA },
1285 [ 0x1b ] = { cmd_start_stop_unit, NONDATA }, /* [1] */
1286 [ 0x1e ] = { cmd_prevent_allow_medium_removal, NONDATA },
1287 [ 0x25 ] = { cmd_read_cdvd_capacity, CHECK_READY },
1288 [ 0x28 ] = { cmd_read, /* (10) */ CHECK_READY },
1289 [ 0x2b ] = { cmd_seek, CHECK_READY | NONDATA },
1290 [ 0x43 ] = { cmd_read_toc_pma_atip, CHECK_READY },
1291 [ 0x46 ] = { cmd_get_configuration, ALLOW_UA },
1292 [ 0x4a ] = { cmd_get_event_status_notification, ALLOW_UA },
1293 [ 0x51 ] = { cmd_read_disc_information, CHECK_READY },
1294 [ 0x5a ] = { cmd_mode_sense, /* (10) */ 0 },
1295 [ 0xa8 ] = { cmd_read, /* (12) */ CHECK_READY },
1296 [ 0xad ] = { cmd_read_dvd_structure, CHECK_READY },
1297 [ 0xbb ] = { cmd_set_speed, NONDATA },
1298 [ 0xbd ] = { cmd_mechanism_status, 0 },
1299 [ 0xbe ] = { cmd_read_cd, CHECK_READY | CONDDATA },
1300 /* [1] handler detects and reports not ready condition itself */
1301 };
1302
1303 void ide_atapi_cmd(IDEState *s)
1304 {
1305 uint8_t *buf = s->io_buffer;
1306 const struct AtapiCmd *cmd = &atapi_cmd_table[s->io_buffer[0]];
1307
1308 trace_ide_atapi_cmd(s, s->io_buffer[0]);
1309
1310 if (trace_event_get_state_backends(TRACE_IDE_ATAPI_CMD_PACKET)) {
1311 /* Each pretty-printed byte needs two bytes and a space; */
1312 char *ppacket = g_malloc(ATAPI_PACKET_SIZE * 3 + 1);
1313 int i;
1314 for (i = 0; i < ATAPI_PACKET_SIZE; i++) {
1315 sprintf(ppacket + (i * 3), "%02x ", buf[i]);
1316 }
1317 trace_ide_atapi_cmd_packet(s, s->lcyl | (s->hcyl << 8), ppacket);
1318 g_free(ppacket);
1319 }
1320
1321 /*
1322 * If there's a UNIT_ATTENTION condition pending, only command flagged with
1323 * ALLOW_UA are allowed to complete. with other commands getting a CHECK
1324 * condition response unless a higher priority status, defined by the drive
1325 * here, is pending.
1326 */
1327 if (s->sense_key == UNIT_ATTENTION && !(cmd->flags & ALLOW_UA)) {
1328 ide_atapi_cmd_check_status(s);
1329 return;
1330 }
1331 /*
1332 * When a CD gets changed, we have to report an ejected state and
1333 * then a loaded state to guests so that they detect tray
1334 * open/close and media change events. Guests that do not use
1335 * GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close
1336 * states rely on this behavior.
1337 */
1338 if (!(cmd->flags & ALLOW_UA) &&
1339 !s->tray_open && blk_is_inserted(s->blk) && s->cdrom_changed) {
1340
1341 if (s->cdrom_changed == 1) {
1342 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT);
1343 s->cdrom_changed = 2;
1344 } else {
1345 ide_atapi_cmd_error(s, UNIT_ATTENTION, ASC_MEDIUM_MAY_HAVE_CHANGED);
1346 s->cdrom_changed = 0;
1347 }
1348
1349 return;
1350 }
1351
1352 /* Report a Not Ready condition if appropriate for the command */
1353 if ((cmd->flags & CHECK_READY) &&
1354 (!media_present(s) || !blk_is_inserted(s->blk)))
1355 {
1356 ide_atapi_cmd_error(s, NOT_READY, ASC_MEDIUM_NOT_PRESENT);
1357 return;
1358 }
1359
1360 /* Commands that don't transfer DATA permit the byte_count_limit to be 0.
1361 * If this is a data-transferring PIO command and BCL is 0,
1362 * we abort at the /ATA/ level, not the ATAPI level.
1363 * See ATA8 ACS3 section 7.17.6.49 and 7.21.5 */
1364 if (cmd->handler && !(cmd->flags & (NONDATA | CONDDATA))) {
1365 if (!validate_bcl(s)) {
1366 return;
1367 }
1368 }
1369
1370 /* Execute the command */
1371 if (cmd->handler) {
1372 cmd->handler(s, buf);
1373 return;
1374 }
1375
1376 ide_atapi_cmd_error(s, ILLEGAL_REQUEST, ASC_ILLEGAL_OPCODE);
1377 }