]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/ide/ide-cd.c
projects / mirror_ubuntu-bionic-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
block: fold cmd_type into the REQ_OP_ space
[mirror_ubuntu-bionic-kernel.git] / drivers / ide / ide-cd.c
1 /*
2 * ATAPI CD-ROM driver.
3 *
4 * Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov>
5 * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
6 * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
7 * Copyright (C) 2005, 2007-2009 Bartlomiej Zolnierkiewicz
8 *
9 * May be copied or modified under the terms of the GNU General Public
10 * License. See linux/COPYING for more information.
11 *
12 * See Documentation/cdrom/ide-cd for usage information.
13 *
14 * Suggestions are welcome. Patches that work are more welcome though. ;-)
15 *
16 * Documentation:
17 * Mt. Fuji (SFF8090 version 4) and ATAPI (SFF-8020i rev 2.6) standards.
18 *
19 * For historical changelog please see:
20 * Documentation/ide/ChangeLog.ide-cd.1994-2004
21 */
22
23 #define DRV_NAME "ide-cd"
24 #define PFX DRV_NAME ": "
25
26 #define IDECD_VERSION "5.00"
27
28 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/kernel.h>
31 #include <linux/delay.h>
32 #include <linux/timer.h>
33 #include <linux/seq_file.h>
34 #include <linux/slab.h>
35 #include <linux/interrupt.h>
36 #include <linux/errno.h>
37 #include <linux/cdrom.h>
38 #include <linux/ide.h>
39 #include <linux/completion.h>
40 #include <linux/mutex.h>
41 #include <linux/bcd.h>
42
43 /* For SCSI -> ATAPI command conversion */
44 #include <scsi/scsi.h>
45
46 #include <linux/io.h>
47 #include <asm/byteorder.h>
48 #include <linux/uaccess.h>
49 #include <asm/unaligned.h>
50
51 #include "ide-cd.h"
52
53 static DEFINE_MUTEX(ide_cd_mutex);
54 static DEFINE_MUTEX(idecd_ref_mutex);
55
56 static void ide_cd_release(struct device *);
57
58 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
59 {
60 struct cdrom_info *cd = NULL;
61
62 mutex_lock(&idecd_ref_mutex);
63 cd = ide_drv_g(disk, cdrom_info);
64 if (cd) {
65 if (ide_device_get(cd->drive))
66 cd = NULL;
67 else
68 get_device(&cd->dev);
69
70 }
71 mutex_unlock(&idecd_ref_mutex);
72 return cd;
73 }
74
75 static void ide_cd_put(struct cdrom_info *cd)
76 {
77 ide_drive_t *drive = cd->drive;
78
79 mutex_lock(&idecd_ref_mutex);
80 put_device(&cd->dev);
81 ide_device_put(drive);
82 mutex_unlock(&idecd_ref_mutex);
83 }
84
85 /*
86 * Generic packet command support and error handling routines.
87 */
88
89 /* Mark that we've seen a media change and invalidate our internal buffers. */
90 static void cdrom_saw_media_change(ide_drive_t *drive)
91 {
92 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
93 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
94 }
95
96 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq)
97 {
98 struct request_sense *sense = &drive->sense_data;
99 int log = 0;
100
101 if (!sense || !rq || (rq->rq_flags & RQF_QUIET))
102 return 0;
103
104 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
105
106 switch (sense->sense_key) {
107 case NO_SENSE:
108 case RECOVERED_ERROR:
109 break;
110 case NOT_READY:
111 /*
112 * don't care about tray state messages for e.g. capacity
113 * commands or in-progress or becoming ready
114 */
115 if (sense->asc == 0x3a || sense->asc == 0x04)
116 break;
117 log = 1;
118 break;
119 case ILLEGAL_REQUEST:
120 /*
121 * don't log START_STOP unit with LoEj set, since we cannot
122 * reliably check if drive can auto-close
123 */
124 if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
125 break;
126 log = 1;
127 break;
128 case UNIT_ATTENTION:
129 /*
130 * Make good and sure we've seen this potential media change.
131 * Some drives (i.e. Creative) fail to present the correct sense
132 * key in the error register.
133 */
134 cdrom_saw_media_change(drive);
135 break;
136 default:
137 log = 1;
138 break;
139 }
140 return log;
141 }
142
143 static void cdrom_analyze_sense_data(ide_drive_t *drive,
144 struct request *failed_command)
145 {
146 struct request_sense *sense = &drive->sense_data;
147 struct cdrom_info *info = drive->driver_data;
148 unsigned long sector;
149 unsigned long bio_sectors;
150
151 ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
152 sense->error_code, sense->sense_key);
153
154 if (failed_command)
155 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
156 failed_command->cmd[0]);
157
158 if (!cdrom_log_sense(drive, failed_command))
159 return;
160
161 /*
162 * If a read toc is executed for a CD-R or CD-RW medium where the first
163 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
164 * confusing error)
165 */
166 if (failed_command && scsi_req(failed_command)->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
167 if (sense->sense_key == 0x05 && sense->asc == 0x24)
168 return;
169
170 /* current error */
171 if (sense->error_code == 0x70) {
172 switch (sense->sense_key) {
173 case MEDIUM_ERROR:
174 case VOLUME_OVERFLOW:
175 case ILLEGAL_REQUEST:
176 if (!sense->valid)
177 break;
178 if (failed_command == NULL ||
179 blk_rq_is_passthrough(failed_command))
180 break;
181 sector = (sense->information[0] << 24) |
182 (sense->information[1] << 16) |
183 (sense->information[2] << 8) |
184 (sense->information[3]);
185
186 if (queue_logical_block_size(drive->queue) == 2048)
187 /* device sector size is 2K */
188 sector <<= 2;
189
190 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
191 sector &= ~(bio_sectors - 1);
192
193 /*
194 * The SCSI specification allows for the value
195 * returned by READ CAPACITY to be up to 75 2K
196 * sectors past the last readable block.
197 * Therefore, if we hit a medium error within the
198 * last 75 2K sectors, we decrease the saved size
199 * value.
200 */
201 if (sector < get_capacity(info->disk) &&
202 drive->probed_capacity - sector < 4 * 75)
203 set_capacity(info->disk, sector);
204 }
205 }
206
207 ide_cd_log_error(drive->name, failed_command, sense);
208 }
209
210 static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
211 {
212 /*
213 * For ATA_PRIV_SENSE, "rq->special" points to the original
214 * failed request. Also, the sense data should be read
215 * directly from rq which might be different from the original
216 * sense buffer if it got copied during mapping.
217 */
218 struct request *failed = (struct request *)rq->special;
219 void *sense = bio_data(rq->bio);
220
221 if (failed) {
222 /*
223 * Sense is always read into drive->sense_data, copy back to the
224 * original request.
225 */
226 memcpy(scsi_req(failed)->sense, sense, 18);
227 scsi_req(failed)->sense_len = scsi_req(rq)->sense_len;
228 cdrom_analyze_sense_data(drive, failed);
229
230 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
231 BUG();
232 } else
233 cdrom_analyze_sense_data(drive, NULL);
234 }
235
236
237 /*
238 * Allow the drive 5 seconds to recover; some devices will return NOT_READY
239 * while flushing data from cache.
240 *
241 * returns: 0 failed (write timeout expired)
242 * 1 success
243 */
244 static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
245 {
246
247 struct cdrom_info *info = drive->driver_data;
248
249 if (!rq->errors)
250 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
251
252 rq->errors = 1;
253
254 if (time_after(jiffies, info->write_timeout))
255 return 0;
256 else {
257 /*
258 * take a breather
259 */
260 blk_delay_queue(drive->queue, 1);
261 return 1;
262 }
263 }
264
265 /**
266 * Returns:
267 * 0: if the request should be continued.
268 * 1: if the request will be going through error recovery.
269 * 2: if the request should be ended.
270 */
271 static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
272 {
273 ide_hwif_t *hwif = drive->hwif;
274 struct request *rq = hwif->rq;
275 int err, sense_key, do_end_request = 0;
276
277 /* get the IDE error register */
278 err = ide_read_error(drive);
279 sense_key = err >> 4;
280
281 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
282 "stat 0x%x",
283 rq->cmd[0], rq->cmd_type, err, stat);
284
285 if (ata_sense_request(rq)) {
286 /*
287 * We got an error trying to get sense info from the drive
288 * (probably while trying to recover from a former error).
289 * Just give up.
290 */
291 rq->rq_flags |= RQF_FAILED;
292 return 2;
293 }
294
295 /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
296 if (blk_rq_is_scsi(rq) && !rq->errors)
297 rq->errors = SAM_STAT_CHECK_CONDITION;
298
299 if (blk_noretry_request(rq))
300 do_end_request = 1;
301
302 switch (sense_key) {
303 case NOT_READY:
304 if (req_op(rq) == REQ_OP_WRITE) {
305 if (ide_cd_breathe(drive, rq))
306 return 1;
307 } else {
308 cdrom_saw_media_change(drive);
309
310 if (!blk_rq_is_passthrough(rq) &&
311 !(rq->rq_flags & RQF_QUIET))
312 printk(KERN_ERR PFX "%s: tray open\n",
313 drive->name);
314 }
315 do_end_request = 1;
316 break;
317 case UNIT_ATTENTION:
318 cdrom_saw_media_change(drive);
319
320 if (blk_rq_is_passthrough(rq))
321 return 0;
322
323 /*
324 * Arrange to retry the request but be sure to give up if we've
325 * retried too many times.
326 */
327 if (++rq->errors > ERROR_MAX)
328 do_end_request = 1;
329 break;
330 case ILLEGAL_REQUEST:
331 /*
332 * Don't print error message for this condition -- SFF8090i
333 * indicates that 5/24/00 is the correct response to a request
334 * to close the tray if the drive doesn't have that capability.
335 *
336 * cdrom_log_sense() knows this!
337 */
338 if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT)
339 break;
340 /* fall-through */
341 case DATA_PROTECT:
342 /*
343 * No point in retrying after an illegal request or data
344 * protect error.
345 */
346 if (!(rq->rq_flags & RQF_QUIET))
347 ide_dump_status(drive, "command error", stat);
348 do_end_request = 1;
349 break;
350 case MEDIUM_ERROR:
351 /*
352 * No point in re-trying a zillion times on a bad sector.
353 * If we got here the error is not correctable.
354 */
355 if (!(rq->rq_flags & RQF_QUIET))
356 ide_dump_status(drive, "media error "
357 "(bad sector)", stat);
358 do_end_request = 1;
359 break;
360 case BLANK_CHECK:
361 /* disk appears blank? */
362 if (!(rq->rq_flags & RQF_QUIET))
363 ide_dump_status(drive, "media error (blank)",
364 stat);
365 do_end_request = 1;
366 break;
367 default:
368 if (blk_rq_is_passthrough(rq))
369 break;
370 if (err & ~ATA_ABORTED) {
371 /* go to the default handler for other errors */
372 ide_error(drive, "cdrom_decode_status", stat);
373 return 1;
374 } else if (++rq->errors > ERROR_MAX)
375 /* we've racked up too many retries, abort */
376 do_end_request = 1;
377 }
378
379 if (blk_rq_is_passthrough(rq)) {
380 rq->rq_flags |= RQF_FAILED;
381 do_end_request = 1;
382 }
383
384 /*
385 * End a request through request sense analysis when we have sense data.
386 * We need this in order to perform end of media processing.
387 */
388 if (do_end_request)
389 goto end_request;
390
391 /* if we got a CHECK_CONDITION status, queue a request sense command */
392 if (stat & ATA_ERR)
393 return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
394 return 1;
395
396 end_request:
397 if (stat & ATA_ERR) {
398 hwif->rq = NULL;
399 return ide_queue_sense_rq(drive, rq) ? 2 : 1;
400 } else
401 return 2;
402 }
403
404 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
405 {
406 struct request *rq = cmd->rq;
407
408 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
409
410 /*
411 * Some of the trailing request sense fields are optional,
412 * and some drives don't send them. Sigh.
413 */
414 if (scsi_req(rq)->cmd[0] == GPCMD_REQUEST_SENSE &&
415 cmd->nleft > 0 && cmd->nleft <= 5)
416 cmd->nleft = 0;
417 }
418
419 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
420 int write, void *buffer, unsigned *bufflen,
421 struct request_sense *sense, int timeout,
422 req_flags_t rq_flags)
423 {
424 struct cdrom_info *info = drive->driver_data;
425 int retries = 10;
426 bool failed;
427
428 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
429 "rq_flags: 0x%x",
430 cmd[0], write, timeout, rq_flags);
431
432 /* start of retry loop */
433 do {
434 struct request *rq;
435 int error;
436 bool delay = false;
437
438 rq = blk_get_request(drive->queue,
439 write ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, __GFP_RECLAIM);
440 scsi_req_init(rq);
441 memcpy(scsi_req(rq)->cmd, cmd, BLK_MAX_CDB);
442 ide_req(rq)->type = ATA_PRIV_PC;
443 rq->rq_flags |= rq_flags;
444 rq->timeout = timeout;
445 if (buffer) {
446 error = blk_rq_map_kern(drive->queue, rq, buffer,
447 *bufflen, GFP_NOIO);
448 if (error) {
449 blk_put_request(rq);
450 return error;
451 }
452 }
453
454 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
455
456 if (buffer)
457 *bufflen = scsi_req(rq)->resid_len;
458 if (sense)
459 memcpy(sense, scsi_req(rq)->sense, sizeof(*sense));
460
461 /*
462 * FIXME: we should probably abort/retry or something in case of
463 * failure.
464 */
465 failed = (rq->rq_flags & RQF_FAILED) != 0;
466 if (failed) {
467 /*
468 * The request failed. Retry if it was due to a unit
469 * attention status (usually means media was changed).
470 */
471 struct request_sense *reqbuf = scsi_req(rq)->sense;
472
473 if (reqbuf->sense_key == UNIT_ATTENTION)
474 cdrom_saw_media_change(drive);
475 else if (reqbuf->sense_key == NOT_READY &&
476 reqbuf->asc == 4 && reqbuf->ascq != 4) {
477 /*
478 * The drive is in the process of loading
479 * a disk. Retry, but wait a little to give
480 * the drive time to complete the load.
481 */
482 delay = true;
483 } else {
484 /* otherwise, don't retry */
485 retries = 0;
486 }
487 --retries;
488 }
489 blk_put_request(rq);
490 if (delay)
491 ssleep(2);
492 } while (failed && retries >= 0);
493
494 /* return an error if the command failed */
495 return failed ? -EIO : 0;
496 }
497
498 /*
499 * returns true if rq has been completed
500 */
501 static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
502 {
503 unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
504
505 if (cmd->tf_flags & IDE_TFLAG_WRITE)
506 nr_bytes -= cmd->last_xfer_len;
507
508 if (nr_bytes > 0) {
509 ide_complete_rq(drive, 0, nr_bytes);
510 return true;
511 }
512
513 return false;
514 }
515
516 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
517 {
518 ide_hwif_t *hwif = drive->hwif;
519 struct ide_cmd *cmd = &hwif->cmd;
520 struct request *rq = hwif->rq;
521 ide_expiry_t *expiry = NULL;
522 int dma_error = 0, dma, thislen, uptodate = 0;
523 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
524 int sense = ata_sense_request(rq);
525 unsigned int timeout;
526 u16 len;
527 u8 ireason, stat;
528
529 ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
530
531 /* check for errors */
532 dma = drive->dma;
533 if (dma) {
534 drive->dma = 0;
535 drive->waiting_for_dma = 0;
536 dma_error = hwif->dma_ops->dma_end(drive);
537 ide_dma_unmap_sg(drive, cmd);
538 if (dma_error) {
539 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
540 write ? "write" : "read");
541 ide_dma_off(drive);
542 }
543 }
544
545 /* check status */
546 stat = hwif->tp_ops->read_status(hwif);
547
548 if (!OK_STAT(stat, 0, BAD_R_STAT)) {
549 rc = cdrom_decode_status(drive, stat);
550 if (rc) {
551 if (rc == 2)
552 goto out_end;
553 return ide_stopped;
554 }
555 }
556
557 /* using dma, transfer is complete now */
558 if (dma) {
559 if (dma_error)
560 return ide_error(drive, "dma error", stat);
561 uptodate = 1;
562 goto out_end;
563 }
564
565 ide_read_bcount_and_ireason(drive, &len, &ireason);
566
567 thislen = !blk_rq_is_passthrough(rq) ? len : cmd->nleft;
568 if (thislen > len)
569 thislen = len;
570
571 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
572 stat, thislen);
573
574 /* If DRQ is clear, the command has completed. */
575 if ((stat & ATA_DRQ) == 0) {
576 switch (req_op(rq)) {
577 default:
578 /*
579 * If we're not done reading/writing, complain.
580 * Otherwise, complete the command normally.
581 */
582 uptodate = 1;
583 if (cmd->nleft > 0) {
584 printk(KERN_ERR PFX "%s: %s: data underrun "
585 "(%u bytes)\n", drive->name, __func__,
586 cmd->nleft);
587 if (!write)
588 rq->rq_flags |= RQF_FAILED;
589 uptodate = 0;
590 }
591 goto out_end;
592 case REQ_OP_DRV_IN:
593 case REQ_OP_DRV_OUT:
594 ide_cd_request_sense_fixup(drive, cmd);
595
596 uptodate = cmd->nleft ? 0 : 1;
597
598 /*
599 * suck out the remaining bytes from the drive in an
600 * attempt to complete the data xfer. (see BZ#13399)
601 */
602 if (!(stat & ATA_ERR) && !uptodate && thislen) {
603 ide_pio_bytes(drive, cmd, write, thislen);
604 uptodate = cmd->nleft ? 0 : 1;
605 }
606
607 if (!uptodate)
608 rq->rq_flags |= RQF_FAILED;
609 goto out_end;
610 case REQ_OP_SCSI_IN:
611 case REQ_OP_SCSI_OUT:
612 goto out_end;
613 }
614 }
615
616 rc = ide_check_ireason(drive, rq, len, ireason, write);
617 if (rc)
618 goto out_end;
619
620 cmd->last_xfer_len = 0;
621
622 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
623 "ireason: 0x%x",
624 rq->cmd_type, ireason);
625
626 /* transfer data */
627 while (thislen > 0) {
628 int blen = min_t(int, thislen, cmd->nleft);
629
630 if (cmd->nleft == 0)
631 break;
632
633 ide_pio_bytes(drive, cmd, write, blen);
634 cmd->last_xfer_len += blen;
635
636 thislen -= blen;
637 len -= blen;
638
639 if (sense && write == 0)
640 scsi_req(rq)->sense_len += blen;
641 }
642
643 /* pad, if necessary */
644 if (len > 0) {
645 if (blk_rq_is_passthrough(rq) || write == 0)
646 ide_pad_transfer(drive, write, len);
647 else {
648 printk(KERN_ERR PFX "%s: confused, missing data\n",
649 drive->name);
650 blk_dump_rq_flags(rq, "cdrom_newpc_intr");
651 }
652 }
653
654 switch (req_op(rq)) {
655 case REQ_OP_SCSI_IN:
656 case REQ_OP_SCSI_OUT:
657 timeout = rq->timeout;
658 break;
659 case REQ_OP_DRV_IN:
660 case REQ_OP_DRV_OUT:
661 expiry = ide_cd_expiry;
662 /*FALLTHRU*/
663 default:
664 timeout = ATAPI_WAIT_PC;
665 break;
666 }
667
668 hwif->expiry = expiry;
669 ide_set_handler(drive, cdrom_newpc_intr, timeout);
670 return ide_started;
671
672 out_end:
673 if (blk_rq_is_scsi(rq) && rc == 0) {
674 scsi_req(rq)->resid_len = 0;
675 blk_end_request_all(rq, 0);
676 hwif->rq = NULL;
677 } else {
678 if (sense && uptodate)
679 ide_cd_complete_failed_rq(drive, rq);
680
681 if (!blk_rq_is_passthrough(rq)) {
682 if (cmd->nleft == 0)
683 uptodate = 1;
684 } else {
685 if (uptodate <= 0 && rq->errors == 0)
686 rq->errors = -EIO;
687 }
688
689 if (uptodate == 0 && rq->bio)
690 if (ide_cd_error_cmd(drive, cmd))
691 return ide_stopped;
692
693 /* make sure it's fully ended */
694 if (blk_rq_is_passthrough(rq)) {
695 scsi_req(rq)->resid_len -= cmd->nbytes - cmd->nleft;
696 if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
697 scsi_req(rq)->resid_len += cmd->last_xfer_len;
698 }
699
700 ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq));
701
702 if (sense && rc == 2)
703 ide_error(drive, "request sense failure", stat);
704 }
705 return ide_stopped;
706 }
707
708 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
709 {
710 struct cdrom_info *cd = drive->driver_data;
711 struct request_queue *q = drive->queue;
712 int write = rq_data_dir(rq) == WRITE;
713 unsigned short sectors_per_frame =
714 queue_logical_block_size(q) >> SECTOR_BITS;
715
716 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
717 "secs_per_frame: %u",
718 rq->cmd[0], rq->cmd_flags, sectors_per_frame);
719
720 if (write) {
721 /* disk has become write protected */
722 if (get_disk_ro(cd->disk))
723 return ide_stopped;
724 } else {
725 /*
726 * We may be retrying this request after an error. Fix up any
727 * weirdness which might be present in the request packet.
728 */
729 q->prep_rq_fn(q, rq);
730 }
731
732 /* fs requests *must* be hardware frame aligned */
733 if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
734 (blk_rq_pos(rq) & (sectors_per_frame - 1)))
735 return ide_stopped;
736
737 /* use DMA, if possible */
738 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
739
740 if (write)
741 cd->devinfo.media_written = 1;
742
743 rq->timeout = ATAPI_WAIT_PC;
744
745 return ide_started;
746 }
747
748 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
749 {
750
751 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
752 rq->cmd[0], rq->cmd_type);
753
754 if (blk_rq_is_scsi(rq))
755 rq->rq_flags |= RQF_QUIET;
756 else
757 rq->rq_flags &= ~RQF_FAILED;
758
759 drive->dma = 0;
760
761 /* sg request */
762 if (rq->bio) {
763 struct request_queue *q = drive->queue;
764 char *buf = bio_data(rq->bio);
765 unsigned int alignment;
766
767 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
768
769 /*
770 * check if dma is safe
771 *
772 * NOTE! The "len" and "addr" checks should possibly have
773 * separate masks.
774 */
775 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
776 if ((unsigned long)buf & alignment
777 || blk_rq_bytes(rq) & q->dma_pad_mask
778 || object_is_on_stack(buf))
779 drive->dma = 0;
780 }
781 }
782
783 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
784 sector_t block)
785 {
786 struct ide_cmd cmd;
787 int uptodate = 0;
788 unsigned int nsectors;
789
790 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
791 rq->cmd[0], (unsigned long long)block);
792
793 if (drive->debug_mask & IDE_DBG_RQ)
794 blk_dump_rq_flags(rq, "ide_cd_do_request");
795
796 switch (req_op(rq)) {
797 default:
798 if (cdrom_start_rw(drive, rq) == ide_stopped)
799 goto out_end;
800 break;
801 case REQ_OP_SCSI_IN:
802 case REQ_OP_SCSI_OUT:
803 handle_pc:
804 if (!rq->timeout)
805 rq->timeout = ATAPI_WAIT_PC;
806 cdrom_do_block_pc(drive, rq);
807 break;
808 case REQ_OP_DRV_IN:
809 case REQ_OP_DRV_OUT:
810 switch (ide_req(rq)->type) {
811 case ATA_PRIV_MISC:
812 /* right now this can only be a reset... */
813 uptodate = 1;
814 goto out_end;
815 case ATA_PRIV_SENSE:
816 case ATA_PRIV_PC:
817 goto handle_pc;
818 default:
819 BUG();
820 }
821 }
822
823 /* prepare sense request for this command */
824 ide_prep_sense(drive, rq);
825
826 memset(&cmd, 0, sizeof(cmd));
827
828 if (rq_data_dir(rq))
829 cmd.tf_flags |= IDE_TFLAG_WRITE;
830
831 cmd.rq = rq;
832
833 if (!blk_rq_is_passthrough(rq) || blk_rq_bytes(rq)) {
834 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
835 ide_map_sg(drive, &cmd);
836 }
837
838 return ide_issue_pc(drive, &cmd);
839 out_end:
840 nsectors = blk_rq_sectors(rq);
841
842 if (nsectors == 0)
843 nsectors = 1;
844
845 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
846
847 return ide_stopped;
848 }
849
850 /*
851 * Ioctl handling.
852 *
853 * Routines which queue packet commands take as a final argument a pointer to a
854 * request_sense struct. If execution of the command results in an error with a
855 * CHECK CONDITION status, this structure will be filled with the results of the
856 * subsequent request sense command. The pointer can also be NULL, in which case
857 * no sense information is returned.
858 */
859 static void msf_from_bcd(struct atapi_msf *msf)
860 {
861 msf->minute = bcd2bin(msf->minute);
862 msf->second = bcd2bin(msf->second);
863 msf->frame = bcd2bin(msf->frame);
864 }
865
866 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
867 {
868 struct cdrom_info *info = drive->driver_data;
869 struct cdrom_device_info *cdi = &info->devinfo;
870 unsigned char cmd[BLK_MAX_CDB];
871
872 ide_debug_log(IDE_DBG_FUNC, "enter");
873
874 memset(cmd, 0, BLK_MAX_CDB);
875 cmd[0] = GPCMD_TEST_UNIT_READY;
876
877 /*
878 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
879 * instead of supporting the LOAD_UNLOAD opcode.
880 */
881 cmd[7] = cdi->sanyo_slot % 3;
882
883 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, RQF_QUIET);
884 }
885
886 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
887 unsigned long *sectors_per_frame,
888 struct request_sense *sense)
889 {
890 struct {
891 __be32 lba;
892 __be32 blocklen;
893 } capbuf;
894
895 int stat;
896 unsigned char cmd[BLK_MAX_CDB];
897 unsigned len = sizeof(capbuf);
898 u32 blocklen;
899
900 ide_debug_log(IDE_DBG_FUNC, "enter");
901
902 memset(cmd, 0, BLK_MAX_CDB);
903 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
904
905 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
906 RQF_QUIET);
907 if (stat)
908 return stat;
909
910 /*
911 * Sanity check the given block size, in so far as making
912 * sure the sectors_per_frame we give to the caller won't
913 * end up being bogus.
914 */
915 blocklen = be32_to_cpu(capbuf.blocklen);
916 blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS;
917 switch (blocklen) {
918 case 512:
919 case 1024:
920 case 2048:
921 case 4096:
922 break;
923 default:
924 printk_once(KERN_ERR PFX "%s: weird block size %u; "
925 "setting default block size to 2048\n",
926 drive->name, blocklen);
927 blocklen = 2048;
928 break;
929 }
930
931 *capacity = 1 + be32_to_cpu(capbuf.lba);
932 *sectors_per_frame = blocklen >> SECTOR_BITS;
933
934 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
935 *capacity, *sectors_per_frame);
936
937 return 0;
938 }
939
940 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
941 int format, char *buf, int buflen,
942 struct request_sense *sense)
943 {
944 unsigned char cmd[BLK_MAX_CDB];
945
946 ide_debug_log(IDE_DBG_FUNC, "enter");
947
948 memset(cmd, 0, BLK_MAX_CDB);
949
950 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
951 cmd[6] = trackno;
952 cmd[7] = (buflen >> 8);
953 cmd[8] = (buflen & 0xff);
954 cmd[9] = (format << 6);
955
956 if (msf_flag)
957 cmd[1] = 2;
958
959 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, RQF_QUIET);
960 }
961
962 /* Try to read the entire TOC for the disk into our internal buffer. */
963 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
964 {
965 int stat, ntracks, i;
966 struct cdrom_info *info = drive->driver_data;
967 struct cdrom_device_info *cdi = &info->devinfo;
968 struct atapi_toc *toc = info->toc;
969 struct {
970 struct atapi_toc_header hdr;
971 struct atapi_toc_entry ent;
972 } ms_tmp;
973 long last_written;
974 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
975
976 ide_debug_log(IDE_DBG_FUNC, "enter");
977
978 if (toc == NULL) {
979 /* try to allocate space */
980 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
981 if (toc == NULL) {
982 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
983 drive->name);
984 return -ENOMEM;
985 }
986 info->toc = toc;
987 }
988
989 /*
990 * Check to see if the existing data is still valid. If it is,
991 * just return.
992 */
993 (void) cdrom_check_status(drive, sense);
994
995 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
996 return 0;
997
998 /* try to get the total cdrom capacity and sector size */
999 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1000 sense);
1001 if (stat)
1002 toc->capacity = 0x1fffff;
1003
1004 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1005 /* save a private copy of the TOC capacity for error handling */
1006 drive->probed_capacity = toc->capacity * sectors_per_frame;
1007
1008 blk_queue_logical_block_size(drive->queue,
1009 sectors_per_frame << SECTOR_BITS);
1010
1011 /* first read just the header, so we know how long the TOC is */
1012 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1013 sizeof(struct atapi_toc_header), sense);
1014 if (stat)
1015 return stat;
1016
1017 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1018 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1019 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1020 }
1021
1022 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1023 if (ntracks <= 0)
1024 return -EIO;
1025 if (ntracks > MAX_TRACKS)
1026 ntracks = MAX_TRACKS;
1027
1028 /* now read the whole schmeer */
1029 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1030 (char *)&toc->hdr,
1031 sizeof(struct atapi_toc_header) +
1032 (ntracks + 1) *
1033 sizeof(struct atapi_toc_entry), sense);
1034
1035 if (stat && toc->hdr.first_track > 1) {
1036 /*
1037 * Cds with CDI tracks only don't have any TOC entries, despite
1038 * of this the returned values are
1039 * first_track == last_track = number of CDI tracks + 1,
1040 * so that this case is indistinguishable from the same layout
1041 * plus an additional audio track. If we get an error for the
1042 * regular case, we assume a CDI without additional audio
1043 * tracks. In this case the readable TOC is empty (CDI tracks
1044 * are not included) and only holds the Leadout entry.
1045 *
1046 * Heiko Eißfeldt.
1047 */
1048 ntracks = 0;
1049 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1050 (char *)&toc->hdr,
1051 sizeof(struct atapi_toc_header) +
1052 (ntracks + 1) *
1053 sizeof(struct atapi_toc_entry),
1054 sense);
1055 if (stat)
1056 return stat;
1057
1058 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1059 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1060 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1061 } else {
1062 toc->hdr.first_track = CDROM_LEADOUT;
1063 toc->hdr.last_track = CDROM_LEADOUT;
1064 }
1065 }
1066
1067 if (stat)
1068 return stat;
1069
1070 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1071
1072 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1073 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1074 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1075 }
1076
1077 for (i = 0; i <= ntracks; i++) {
1078 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1079 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1080 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1081 msf_from_bcd(&toc->ent[i].addr.msf);
1082 }
1083 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1084 toc->ent[i].addr.msf.second,
1085 toc->ent[i].addr.msf.frame);
1086 }
1087
1088 if (toc->hdr.first_track != CDROM_LEADOUT) {
1089 /* read the multisession information */
1090 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1091 sizeof(ms_tmp), sense);
1092 if (stat)
1093 return stat;
1094
1095 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1096 } else {
1097 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1098 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1099 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1100 }
1101
1102 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1103 /* re-read multisession information using MSF format */
1104 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1105 sizeof(ms_tmp), sense);
1106 if (stat)
1107 return stat;
1108
1109 msf_from_bcd(&ms_tmp.ent.addr.msf);
1110 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1111 ms_tmp.ent.addr.msf.second,
1112 ms_tmp.ent.addr.msf.frame);
1113 }
1114
1115 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1116
1117 /* now try to get the total cdrom capacity */
1118 stat = cdrom_get_last_written(cdi, &last_written);
1119 if (!stat && (last_written > toc->capacity)) {
1120 toc->capacity = last_written;
1121 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1122 drive->probed_capacity = toc->capacity * sectors_per_frame;
1123 }
1124
1125 /* Remember that we've read this stuff. */
1126 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1127
1128 return 0;
1129 }
1130
1131 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1132 {
1133 struct cdrom_info *info = drive->driver_data;
1134 struct cdrom_device_info *cdi = &info->devinfo;
1135 struct packet_command cgc;
1136 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1137
1138 ide_debug_log(IDE_DBG_FUNC, "enter");
1139
1140 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1141 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1142
1143 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1144 do {
1145 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1146 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1147 if (!stat)
1148 break;
1149 } while (--attempts);
1150 return stat;
1151 }
1152
1153 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1154 {
1155 struct cdrom_info *cd = drive->driver_data;
1156 u16 curspeed, maxspeed;
1157
1158 ide_debug_log(IDE_DBG_FUNC, "enter");
1159
1160 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1161 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1162 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1163 } else {
1164 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1165 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1166 }
1167
1168 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1169 curspeed, maxspeed);
1170
1171 cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
1172 cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
1173 }
1174
1175 #define IDE_CD_CAPABILITIES \
1176 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1177 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1178 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1179 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1180 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1181
1182 static struct cdrom_device_ops ide_cdrom_dops = {
1183 .open = ide_cdrom_open_real,
1184 .release = ide_cdrom_release_real,
1185 .drive_status = ide_cdrom_drive_status,
1186 .check_events = ide_cdrom_check_events_real,
1187 .tray_move = ide_cdrom_tray_move,
1188 .lock_door = ide_cdrom_lock_door,
1189 .select_speed = ide_cdrom_select_speed,
1190 .get_last_session = ide_cdrom_get_last_session,
1191 .get_mcn = ide_cdrom_get_mcn,
1192 .reset = ide_cdrom_reset,
1193 .audio_ioctl = ide_cdrom_audio_ioctl,
1194 .capability = IDE_CD_CAPABILITIES,
1195 .generic_packet = ide_cdrom_packet,
1196 };
1197
1198 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1199 {
1200 struct cdrom_info *info = drive->driver_data;
1201 struct cdrom_device_info *devinfo = &info->devinfo;
1202
1203 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1204
1205 devinfo->ops = &ide_cdrom_dops;
1206 devinfo->speed = info->current_speed;
1207 devinfo->capacity = nslots;
1208 devinfo->handle = drive;
1209 strcpy(devinfo->name, drive->name);
1210
1211 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1212 devinfo->mask |= CDC_SELECT_SPEED;
1213
1214 devinfo->disk = info->disk;
1215 return register_cdrom(devinfo);
1216 }
1217
1218 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1219 {
1220 struct cdrom_info *cd = drive->driver_data;
1221 struct cdrom_device_info *cdi = &cd->devinfo;
1222 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1223 mechtype_t mechtype;
1224 int nslots = 1;
1225
1226 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1227 drive->media, drive->atapi_flags);
1228
1229 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1230 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1231 CDC_MO_DRIVE | CDC_RAM);
1232
1233 if (drive->media == ide_optical) {
1234 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1235 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1236 drive->name);
1237 return nslots;
1238 }
1239
1240 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1241 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1242 cdi->mask &= ~CDC_PLAY_AUDIO;
1243 return nslots;
1244 }
1245
1246 /*
1247 * We have to cheat a little here. the packet will eventually be queued
1248 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1249 * Since this device hasn't been registered with the Uniform layer yet,
1250 * it can't do this. Same goes for cdi->ops.
1251 */
1252 cdi->handle = drive;
1253 cdi->ops = &ide_cdrom_dops;
1254
1255 if (ide_cdrom_get_capabilities(drive, buf))
1256 return 0;
1257
1258 if ((buf[8 + 6] & 0x01) == 0)
1259 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1260 if (buf[8 + 6] & 0x08)
1261 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1262 if (buf[8 + 3] & 0x01)
1263 cdi->mask &= ~CDC_CD_R;
1264 if (buf[8 + 3] & 0x02)
1265 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1266 if (buf[8 + 2] & 0x38)
1267 cdi->mask &= ~CDC_DVD;
1268 if (buf[8 + 3] & 0x20)
1269 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1270 if (buf[8 + 3] & 0x10)
1271 cdi->mask &= ~CDC_DVD_R;
1272 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1273 cdi->mask &= ~CDC_PLAY_AUDIO;
1274
1275 mechtype = buf[8 + 6] >> 5;
1276 if (mechtype == mechtype_caddy ||
1277 mechtype == mechtype_popup ||
1278 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1279 cdi->mask |= CDC_CLOSE_TRAY;
1280
1281 if (cdi->sanyo_slot > 0) {
1282 cdi->mask &= ~CDC_SELECT_DISC;
1283 nslots = 3;
1284 } else if (mechtype == mechtype_individual_changer ||
1285 mechtype == mechtype_cartridge_changer) {
1286 nslots = cdrom_number_of_slots(cdi);
1287 if (nslots > 1)
1288 cdi->mask &= ~CDC_SELECT_DISC;
1289 }
1290
1291 ide_cdrom_update_speed(drive, buf);
1292
1293 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1294
1295 /* don't print speed if the drive reported 0 */
1296 if (cd->max_speed)
1297 printk(KERN_CONT " %dX", cd->max_speed);
1298
1299 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1300
1301 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1302 printk(KERN_CONT " DVD%s%s",
1303 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1304 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1305
1306 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1307 printk(KERN_CONT " CD%s%s",
1308 (cdi->mask & CDC_CD_R) ? "" : "-R",
1309 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1310
1311 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1312 printk(KERN_CONT " changer w/%d slots", nslots);
1313 else
1314 printk(KERN_CONT " drive");
1315
1316 printk(KERN_CONT ", %dkB Cache\n",
1317 be16_to_cpup((__be16 *)&buf[8 + 12]));
1318
1319 return nslots;
1320 }
1321
1322 /* standard prep_rq_fn that builds 10 byte cmds */
1323 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1324 {
1325 int hard_sect = queue_logical_block_size(q);
1326 long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
1327 unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
1328 struct scsi_request *req = scsi_req(rq);
1329
1330 memset(req->cmd, 0, BLK_MAX_CDB);
1331
1332 if (rq_data_dir(rq) == READ)
1333 req->cmd[0] = GPCMD_READ_10;
1334 else
1335 req->cmd[0] = GPCMD_WRITE_10;
1336
1337 /*
1338 * fill in lba
1339 */
1340 req->cmd[2] = (block >> 24) & 0xff;
1341 req->cmd[3] = (block >> 16) & 0xff;
1342 req->cmd[4] = (block >> 8) & 0xff;
1343 req->cmd[5] = block & 0xff;
1344
1345 /*
1346 * and transfer length
1347 */
1348 req->cmd[7] = (blocks >> 8) & 0xff;
1349 req->cmd[8] = blocks & 0xff;
1350 req->cmd_len = 10;
1351 return BLKPREP_OK;
1352 }
1353
1354 /*
1355 * Most of the SCSI commands are supported directly by ATAPI devices.
1356 * This transform handles the few exceptions.
1357 */
1358 static int ide_cdrom_prep_pc(struct request *rq)
1359 {
1360 u8 *c = scsi_req(rq)->cmd;
1361
1362 /* transform 6-byte read/write commands to the 10-byte version */
1363 if (c[0] == READ_6 || c[0] == WRITE_6) {
1364 c[8] = c[4];
1365 c[5] = c[3];
1366 c[4] = c[2];
1367 c[3] = c[1] & 0x1f;
1368 c[2] = 0;
1369 c[1] &= 0xe0;
1370 c[0] += (READ_10 - READ_6);
1371 scsi_req(rq)->cmd_len = 10;
1372 return BLKPREP_OK;
1373 }
1374
1375 /*
1376 * it's silly to pretend we understand 6-byte sense commands, just
1377 * reject with ILLEGAL_REQUEST and the caller should take the
1378 * appropriate action
1379 */
1380 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1381 rq->errors = ILLEGAL_REQUEST;
1382 return BLKPREP_KILL;
1383 }
1384
1385 return BLKPREP_OK;
1386 }
1387
1388 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1389 {
1390 if (!blk_rq_is_passthrough(rq))
1391 return ide_cdrom_prep_fs(q, rq);
1392 else if (blk_rq_is_scsi(rq))
1393 return ide_cdrom_prep_pc(rq);
1394
1395 return 0;
1396 }
1397
1398 struct cd_list_entry {
1399 const char *id_model;
1400 const char *id_firmware;
1401 unsigned int cd_flags;
1402 };
1403
1404 #ifdef CONFIG_IDE_PROC_FS
1405 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1406 {
1407 unsigned long capacity, sectors_per_frame;
1408
1409 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1410 return 0;
1411
1412 return capacity * sectors_per_frame;
1413 }
1414
1415 static int idecd_capacity_proc_show(struct seq_file *m, void *v)
1416 {
1417 ide_drive_t *drive = m->private;
1418
1419 seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
1420 return 0;
1421 }
1422
1423 static int idecd_capacity_proc_open(struct inode *inode, struct file *file)
1424 {
1425 return single_open(file, idecd_capacity_proc_show, PDE_DATA(inode));
1426 }
1427
1428 static const struct file_operations idecd_capacity_proc_fops = {
1429 .owner = THIS_MODULE,
1430 .open = idecd_capacity_proc_open,
1431 .read = seq_read,
1432 .llseek = seq_lseek,
1433 .release = single_release,
1434 };
1435
1436 static ide_proc_entry_t idecd_proc[] = {
1437 { "capacity", S_IFREG|S_IRUGO, &idecd_capacity_proc_fops },
1438 {}
1439 };
1440
1441 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1442 {
1443 return idecd_proc;
1444 }
1445
1446 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1447 {
1448 return NULL;
1449 }
1450 #endif
1451
1452 static const struct cd_list_entry ide_cd_quirks_list[] = {
1453 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1454 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1455 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1456 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1457 IDE_AFLAG_PRE_ATAPI12, },
1458 /* Vertos 300, some versions of this drive like to talk BCD. */
1459 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1460 /* Vertos 600 ESD. */
1461 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1462 /*
1463 * Sanyo 3 CD changer uses a non-standard command for CD changing
1464 * (by default standard ATAPI support for CD changers is used).
1465 */
1466 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1467 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1468 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1469 /* Stingray 8X CD-ROM. */
1470 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1471 /*
1472 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1473 * mode sense page capabilities size, but older drives break.
1474 */
1475 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1476 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1477 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1478 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1479 /*
1480 * Some drives used by Apple don't advertise audio play
1481 * but they do support reading TOC & audio datas.
1482 */
1483 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1484 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1485 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1486 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1487 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1488 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1489 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1490 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1491 { NULL, NULL, 0 }
1492 };
1493
1494 static unsigned int ide_cd_flags(u16 *id)
1495 {
1496 const struct cd_list_entry *cle = ide_cd_quirks_list;
1497
1498 while (cle->id_model) {
1499 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1500 (cle->id_firmware == NULL ||
1501 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1502 return cle->cd_flags;
1503 cle++;
1504 }
1505
1506 return 0;
1507 }
1508
1509 static int ide_cdrom_setup(ide_drive_t *drive)
1510 {
1511 struct cdrom_info *cd = drive->driver_data;
1512 struct cdrom_device_info *cdi = &cd->devinfo;
1513 struct request_queue *q = drive->queue;
1514 u16 *id = drive->id;
1515 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1516 int nslots;
1517
1518 ide_debug_log(IDE_DBG_PROBE, "enter");
1519
1520 blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1521 blk_queue_dma_alignment(q, 31);
1522 blk_queue_update_dma_pad(q, 15);
1523
1524 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1525 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1526
1527 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1528 fw_rev[4] == '1' && fw_rev[6] <= '2')
1529 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1530 IDE_AFLAG_TOCADDR_AS_BCD);
1531 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1532 fw_rev[4] == '1' && fw_rev[6] <= '2')
1533 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1534 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1535 /* 3 => use CD in slot 0 */
1536 cdi->sanyo_slot = 3;
1537
1538 nslots = ide_cdrom_probe_capabilities(drive);
1539
1540 blk_queue_logical_block_size(q, CD_FRAMESIZE);
1541
1542 if (ide_cdrom_register(drive, nslots)) {
1543 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1544 " cdrom driver.\n", drive->name, __func__);
1545 cd->devinfo.handle = NULL;
1546 return 1;
1547 }
1548
1549 ide_proc_register_driver(drive, cd->driver);
1550 return 0;
1551 }
1552
1553 static void ide_cd_remove(ide_drive_t *drive)
1554 {
1555 struct cdrom_info *info = drive->driver_data;
1556
1557 ide_debug_log(IDE_DBG_FUNC, "enter");
1558
1559 ide_proc_unregister_driver(drive, info->driver);
1560 device_del(&info->dev);
1561 del_gendisk(info->disk);
1562
1563 mutex_lock(&idecd_ref_mutex);
1564 put_device(&info->dev);
1565 mutex_unlock(&idecd_ref_mutex);
1566 }
1567
1568 static void ide_cd_release(struct device *dev)
1569 {
1570 struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1571 struct cdrom_device_info *devinfo = &info->devinfo;
1572 ide_drive_t *drive = info->drive;
1573 struct gendisk *g = info->disk;
1574
1575 ide_debug_log(IDE_DBG_FUNC, "enter");
1576
1577 kfree(info->toc);
1578 if (devinfo->handle == drive)
1579 unregister_cdrom(devinfo);
1580 drive->driver_data = NULL;
1581 blk_queue_prep_rq(drive->queue, NULL);
1582 g->private_data = NULL;
1583 put_disk(g);
1584 kfree(info);
1585 }
1586
1587 static int ide_cd_probe(ide_drive_t *);
1588
1589 static struct ide_driver ide_cdrom_driver = {
1590 .gen_driver = {
1591 .owner = THIS_MODULE,
1592 .name = "ide-cdrom",
1593 .bus = &ide_bus_type,
1594 },
1595 .probe = ide_cd_probe,
1596 .remove = ide_cd_remove,
1597 .version = IDECD_VERSION,
1598 .do_request = ide_cd_do_request,
1599 #ifdef CONFIG_IDE_PROC_FS
1600 .proc_entries = ide_cd_proc_entries,
1601 .proc_devsets = ide_cd_proc_devsets,
1602 #endif
1603 };
1604
1605 static int idecd_open(struct block_device *bdev, fmode_t mode)
1606 {
1607 struct cdrom_info *info;
1608 int rc = -ENXIO;
1609
1610 mutex_lock(&ide_cd_mutex);
1611 info = ide_cd_get(bdev->bd_disk);
1612 if (!info)
1613 goto out;
1614
1615 rc = cdrom_open(&info->devinfo, bdev, mode);
1616 if (rc < 0)
1617 ide_cd_put(info);
1618 out:
1619 mutex_unlock(&ide_cd_mutex);
1620 return rc;
1621 }
1622
1623 static void idecd_release(struct gendisk *disk, fmode_t mode)
1624 {
1625 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1626
1627 mutex_lock(&ide_cd_mutex);
1628 cdrom_release(&info->devinfo, mode);
1629
1630 ide_cd_put(info);
1631 mutex_unlock(&ide_cd_mutex);
1632 }
1633
1634 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1635 {
1636 struct packet_command cgc;
1637 char buffer[16];
1638 int stat;
1639 char spindown;
1640
1641 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1642 return -EFAULT;
1643
1644 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1645
1646 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1647 if (stat)
1648 return stat;
1649
1650 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1651 return cdrom_mode_select(cdi, &cgc);
1652 }
1653
1654 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1655 {
1656 struct packet_command cgc;
1657 char buffer[16];
1658 int stat;
1659 char spindown;
1660
1661 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1662
1663 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1664 if (stat)
1665 return stat;
1666
1667 spindown = buffer[11] & 0x0f;
1668 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1669 return -EFAULT;
1670 return 0;
1671 }
1672
1673 static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1674 unsigned int cmd, unsigned long arg)
1675 {
1676 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1677 int err;
1678
1679 switch (cmd) {
1680 case CDROMSETSPINDOWN:
1681 return idecd_set_spindown(&info->devinfo, arg);
1682 case CDROMGETSPINDOWN:
1683 return idecd_get_spindown(&info->devinfo, arg);
1684 default:
1685 break;
1686 }
1687
1688 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1689 if (err == -EINVAL)
1690 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1691
1692 return err;
1693 }
1694
1695 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1696 unsigned int cmd, unsigned long arg)
1697 {
1698 int ret;
1699
1700 mutex_lock(&ide_cd_mutex);
1701 ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
1702 mutex_unlock(&ide_cd_mutex);
1703
1704 return ret;
1705 }
1706
1707
1708 static unsigned int idecd_check_events(struct gendisk *disk,
1709 unsigned int clearing)
1710 {
1711 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1712 return cdrom_check_events(&info->devinfo, clearing);
1713 }
1714
1715 static int idecd_revalidate_disk(struct gendisk *disk)
1716 {
1717 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1718 struct request_sense sense;
1719
1720 ide_cd_read_toc(info->drive, &sense);
1721
1722 return 0;
1723 }
1724
1725 static const struct block_device_operations idecd_ops = {
1726 .owner = THIS_MODULE,
1727 .open = idecd_open,
1728 .release = idecd_release,
1729 .ioctl = idecd_ioctl,
1730 .check_events = idecd_check_events,
1731 .revalidate_disk = idecd_revalidate_disk
1732 };
1733
1734 /* module options */
1735 static unsigned long debug_mask;
1736 module_param(debug_mask, ulong, 0644);
1737
1738 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1739
1740 static int ide_cd_probe(ide_drive_t *drive)
1741 {
1742 struct cdrom_info *info;
1743 struct gendisk *g;
1744 struct request_sense sense;
1745
1746 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1747 drive->driver_req, drive->media);
1748
1749 if (!strstr("ide-cdrom", drive->driver_req))
1750 goto failed;
1751
1752 if (drive->media != ide_cdrom && drive->media != ide_optical)
1753 goto failed;
1754
1755 drive->debug_mask = debug_mask;
1756 drive->irq_handler = cdrom_newpc_intr;
1757
1758 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1759 if (info == NULL) {
1760 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1761 drive->name);
1762 goto failed;
1763 }
1764
1765 g = alloc_disk(1 << PARTN_BITS);
1766 if (!g)
1767 goto out_free_cd;
1768
1769 ide_init_disk(g, drive);
1770
1771 info->dev.parent = &drive->gendev;
1772 info->dev.release = ide_cd_release;
1773 dev_set_name(&info->dev, "%s", dev_name(&drive->gendev));
1774
1775 if (device_register(&info->dev))
1776 goto out_free_disk;
1777
1778 info->drive = drive;
1779 info->driver = &ide_cdrom_driver;
1780 info->disk = g;
1781
1782 g->private_data = &info->driver;
1783
1784 drive->driver_data = info;
1785
1786 g->minors = 1;
1787 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1788 if (ide_cdrom_setup(drive)) {
1789 put_device(&info->dev);
1790 goto failed;
1791 }
1792
1793 ide_cd_read_toc(drive, &sense);
1794 g->fops = &idecd_ops;
1795 g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
1796 device_add_disk(&drive->gendev, g);
1797 return 0;
1798
1799 out_free_disk:
1800 put_disk(g);
1801 out_free_cd:
1802 kfree(info);
1803 failed:
1804 return -ENODEV;
1805 }
1806
1807 static void __exit ide_cdrom_exit(void)
1808 {
1809 driver_unregister(&ide_cdrom_driver.gen_driver);
1810 }
1811
1812 static int __init ide_cdrom_init(void)
1813 {
1814 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1815 return driver_register(&ide_cdrom_driver.gen_driver);
1816 }
1817
1818 MODULE_ALIAS("ide:*m-cdrom*");
1819 MODULE_ALIAS("ide-cd");
1820 module_init(ide_cdrom_init);
1821 module_exit(ide_cdrom_exit);
1822 MODULE_LICENSE("GPL");
ubuntu-bionic-kernel mirror