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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/sched/task_stack.h>
32 #include <linux/delay.h>
33 #include <linux/timer.h>
34 #include <linux/seq_file.h>
35 #include <linux/slab.h>
36 #include <linux/interrupt.h>
37 #include <linux/errno.h>
38 #include <linux/cdrom.h>
39 #include <linux/ide.h>
40 #include <linux/completion.h>
41 #include <linux/mutex.h>
42 #include <linux/bcd.h>
43
44 /* For SCSI -> ATAPI command conversion */
45 #include <scsi/scsi.h>
46
47 #include <linux/io.h>
48 #include <asm/byteorder.h>
49 #include <linux/uaccess.h>
50 #include <asm/unaligned.h>
51
52 #include "ide-cd.h"
53
54 static DEFINE_MUTEX(ide_cd_mutex);
55 static DEFINE_MUTEX(idecd_ref_mutex);
56
57 static void ide_cd_release(struct device *);
58
59 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
60 {
61 struct cdrom_info *cd = NULL;
62
63 mutex_lock(&idecd_ref_mutex);
64 cd = ide_drv_g(disk, cdrom_info);
65 if (cd) {
66 if (ide_device_get(cd->drive))
67 cd = NULL;
68 else
69 get_device(&cd->dev);
70
71 }
72 mutex_unlock(&idecd_ref_mutex);
73 return cd;
74 }
75
76 static void ide_cd_put(struct cdrom_info *cd)
77 {
78 ide_drive_t *drive = cd->drive;
79
80 mutex_lock(&idecd_ref_mutex);
81 put_device(&cd->dev);
82 ide_device_put(drive);
83 mutex_unlock(&idecd_ref_mutex);
84 }
85
86 /*
87 * Generic packet command support and error handling routines.
88 */
89
90 /* Mark that we've seen a media change and invalidate our internal buffers. */
91 static void cdrom_saw_media_change(ide_drive_t *drive)
92 {
93 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
94 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
95 }
96
97 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq)
98 {
99 struct request_sense *sense = &drive->sense_data;
100 int log = 0;
101
102 if (!sense || !rq || (rq->rq_flags & RQF_QUIET))
103 return 0;
104
105 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
106
107 switch (sense->sense_key) {
108 case NO_SENSE:
109 case RECOVERED_ERROR:
110 break;
111 case NOT_READY:
112 /*
113 * don't care about tray state messages for e.g. capacity
114 * commands or in-progress or becoming ready
115 */
116 if (sense->asc == 0x3a || sense->asc == 0x04)
117 break;
118 log = 1;
119 break;
120 case ILLEGAL_REQUEST:
121 /*
122 * don't log START_STOP unit with LoEj set, since we cannot
123 * reliably check if drive can auto-close
124 */
125 if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
126 break;
127 log = 1;
128 break;
129 case UNIT_ATTENTION:
130 /*
131 * Make good and sure we've seen this potential media change.
132 * Some drives (i.e. Creative) fail to present the correct sense
133 * key in the error register.
134 */
135 cdrom_saw_media_change(drive);
136 break;
137 default:
138 log = 1;
139 break;
140 }
141 return log;
142 }
143
144 static void cdrom_analyze_sense_data(ide_drive_t *drive,
145 struct request *failed_command)
146 {
147 struct request_sense *sense = &drive->sense_data;
148 struct cdrom_info *info = drive->driver_data;
149 unsigned long sector;
150 unsigned long bio_sectors;
151
152 ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
153 sense->error_code, sense->sense_key);
154
155 if (failed_command)
156 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
157 failed_command->cmd[0]);
158
159 if (!cdrom_log_sense(drive, failed_command))
160 return;
161
162 /*
163 * If a read toc is executed for a CD-R or CD-RW medium where the first
164 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
165 * confusing error)
166 */
167 if (failed_command && scsi_req(failed_command)->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
168 if (sense->sense_key == 0x05 && sense->asc == 0x24)
169 return;
170
171 /* current error */
172 if (sense->error_code == 0x70) {
173 switch (sense->sense_key) {
174 case MEDIUM_ERROR:
175 case VOLUME_OVERFLOW:
176 case ILLEGAL_REQUEST:
177 if (!sense->valid)
178 break;
179 if (failed_command == NULL ||
180 blk_rq_is_passthrough(failed_command))
181 break;
182 sector = (sense->information[0] << 24) |
183 (sense->information[1] << 16) |
184 (sense->information[2] << 8) |
185 (sense->information[3]);
186
187 if (queue_logical_block_size(drive->queue) == 2048)
188 /* device sector size is 2K */
189 sector <<= 2;
190
191 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
192 sector &= ~(bio_sectors - 1);
193
194 /*
195 * The SCSI specification allows for the value
196 * returned by READ CAPACITY to be up to 75 2K
197 * sectors past the last readable block.
198 * Therefore, if we hit a medium error within the
199 * last 75 2K sectors, we decrease the saved size
200 * value.
201 */
202 if (sector < get_capacity(info->disk) &&
203 drive->probed_capacity - sector < 4 * 75)
204 set_capacity(info->disk, sector);
205 }
206 }
207
208 ide_cd_log_error(drive->name, failed_command, sense);
209 }
210
211 static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
212 {
213 /*
214 * For ATA_PRIV_SENSE, "rq->special" points to the original
215 * failed request. Also, the sense data should be read
216 * directly from rq which might be different from the original
217 * sense buffer if it got copied during mapping.
218 */
219 struct request *failed = (struct request *)rq->special;
220 void *sense = bio_data(rq->bio);
221
222 if (failed) {
223 /*
224 * Sense is always read into drive->sense_data, copy back to the
225 * original request.
226 */
227 memcpy(scsi_req(failed)->sense, sense, 18);
228 scsi_req(failed)->sense_len = scsi_req(rq)->sense_len;
229 cdrom_analyze_sense_data(drive, failed);
230
231 if (ide_end_rq(drive, failed, BLK_STS_IOERR, blk_rq_bytes(failed)))
232 BUG();
233 } else
234 cdrom_analyze_sense_data(drive, NULL);
235 }
236
237
238 /*
239 * Allow the drive 5 seconds to recover; some devices will return NOT_READY
240 * while flushing data from cache.
241 *
242 * returns: 0 failed (write timeout expired)
243 * 1 success
244 */
245 static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
246 {
247
248 struct cdrom_info *info = drive->driver_data;
249
250 if (!scsi_req(rq)->result)
251 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
252
253 scsi_req(rq)->result = 1;
254
255 if (time_after(jiffies, info->write_timeout))
256 return 0;
257 else {
258 /*
259 * take a breather
260 */
261 blk_delay_queue(drive->queue, 1);
262 return 1;
263 }
264 }
265
266 /**
267 * Returns:
268 * 0: if the request should be continued.
269 * 1: if the request will be going through error recovery.
270 * 2: if the request should be ended.
271 */
272 static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
273 {
274 ide_hwif_t *hwif = drive->hwif;
275 struct request *rq = hwif->rq;
276 int err, sense_key, do_end_request = 0;
277
278 /* get the IDE error register */
279 err = ide_read_error(drive);
280 sense_key = err >> 4;
281
282 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
283 "stat 0x%x",
284 rq->cmd[0], rq->cmd_type, err, stat);
285
286 if (ata_sense_request(rq)) {
287 /*
288 * We got an error trying to get sense info from the drive
289 * (probably while trying to recover from a former error).
290 * Just give up.
291 */
292 rq->rq_flags |= RQF_FAILED;
293 return 2;
294 }
295
296 /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
297 if (blk_rq_is_scsi(rq) && !scsi_req(rq)->result)
298 scsi_req(rq)->result = SAM_STAT_CHECK_CONDITION;
299
300 if (blk_noretry_request(rq))
301 do_end_request = 1;
302
303 switch (sense_key) {
304 case NOT_READY:
305 if (req_op(rq) == REQ_OP_WRITE) {
306 if (ide_cd_breathe(drive, rq))
307 return 1;
308 } else {
309 cdrom_saw_media_change(drive);
310
311 if (!blk_rq_is_passthrough(rq) &&
312 !(rq->rq_flags & RQF_QUIET))
313 printk(KERN_ERR PFX "%s: tray open\n",
314 drive->name);
315 }
316 do_end_request = 1;
317 break;
318 case UNIT_ATTENTION:
319 cdrom_saw_media_change(drive);
320
321 if (blk_rq_is_passthrough(rq))
322 return 0;
323
324 /*
325 * Arrange to retry the request but be sure to give up if we've
326 * retried too many times.
327 */
328 if (++scsi_req(rq)->result > ERROR_MAX)
329 do_end_request = 1;
330 break;
331 case ILLEGAL_REQUEST:
332 /*
333 * Don't print error message for this condition -- SFF8090i
334 * indicates that 5/24/00 is the correct response to a request
335 * to close the tray if the drive doesn't have that capability.
336 *
337 * cdrom_log_sense() knows this!
338 */
339 if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT)
340 break;
341 /* fall-through */
342 case DATA_PROTECT:
343 /*
344 * No point in retrying after an illegal request or data
345 * protect error.
346 */
347 if (!(rq->rq_flags & RQF_QUIET))
348 ide_dump_status(drive, "command error", stat);
349 do_end_request = 1;
350 break;
351 case MEDIUM_ERROR:
352 /*
353 * No point in re-trying a zillion times on a bad sector.
354 * If we got here the error is not correctable.
355 */
356 if (!(rq->rq_flags & RQF_QUIET))
357 ide_dump_status(drive, "media error "
358 "(bad sector)", stat);
359 do_end_request = 1;
360 break;
361 case BLANK_CHECK:
362 /* disk appears blank? */
363 if (!(rq->rq_flags & RQF_QUIET))
364 ide_dump_status(drive, "media error (blank)",
365 stat);
366 do_end_request = 1;
367 break;
368 default:
369 if (blk_rq_is_passthrough(rq))
370 break;
371 if (err & ~ATA_ABORTED) {
372 /* go to the default handler for other errors */
373 ide_error(drive, "cdrom_decode_status", stat);
374 return 1;
375 } else if (++scsi_req(rq)->result > ERROR_MAX)
376 /* we've racked up too many retries, abort */
377 do_end_request = 1;
378 }
379
380 if (blk_rq_is_passthrough(rq)) {
381 rq->rq_flags |= RQF_FAILED;
382 do_end_request = 1;
383 }
384
385 /*
386 * End a request through request sense analysis when we have sense data.
387 * We need this in order to perform end of media processing.
388 */
389 if (do_end_request)
390 goto end_request;
391
392 /* if we got a CHECK_CONDITION status, queue a request sense command */
393 if (stat & ATA_ERR)
394 return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
395 return 1;
396
397 end_request:
398 if (stat & ATA_ERR) {
399 hwif->rq = NULL;
400 return ide_queue_sense_rq(drive, rq) ? 2 : 1;
401 } else
402 return 2;
403 }
404
405 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
406 {
407 struct request *rq = cmd->rq;
408
409 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
410
411 /*
412 * Some of the trailing request sense fields are optional,
413 * and some drives don't send them. Sigh.
414 */
415 if (scsi_req(rq)->cmd[0] == GPCMD_REQUEST_SENSE &&
416 cmd->nleft > 0 && cmd->nleft <= 5)
417 cmd->nleft = 0;
418 }
419
420 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
421 int write, void *buffer, unsigned *bufflen,
422 struct request_sense *sense, int timeout,
423 req_flags_t rq_flags)
424 {
425 struct cdrom_info *info = drive->driver_data;
426 int retries = 10;
427 bool failed;
428
429 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
430 "rq_flags: 0x%x",
431 cmd[0], write, timeout, rq_flags);
432
433 /* start of retry loop */
434 do {
435 struct request *rq;
436 int error;
437 bool delay = false;
438
439 rq = blk_get_request(drive->queue,
440 write ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, __GFP_RECLAIM);
441 scsi_req_init(rq);
442 memcpy(scsi_req(rq)->cmd, cmd, BLK_MAX_CDB);
443 ide_req(rq)->type = ATA_PRIV_PC;
444 rq->rq_flags |= rq_flags;
445 rq->timeout = timeout;
446 if (buffer) {
447 error = blk_rq_map_kern(drive->queue, rq, buffer,
448 *bufflen, GFP_NOIO);
449 if (error) {
450 blk_put_request(rq);
451 return error;
452 }
453 }
454
455 blk_execute_rq(drive->queue, info->disk, rq, 0);
456 error = scsi_req(rq)->result ? -EIO : 0;
457
458 if (buffer)
459 *bufflen = scsi_req(rq)->resid_len;
460 if (sense)
461 memcpy(sense, scsi_req(rq)->sense, sizeof(*sense));
462
463 /*
464 * FIXME: we should probably abort/retry or something in case of
465 * failure.
466 */
467 failed = (rq->rq_flags & RQF_FAILED) != 0;
468 if (failed) {
469 /*
470 * The request failed. Retry if it was due to a unit
471 * attention status (usually means media was changed).
472 */
473 struct request_sense *reqbuf = scsi_req(rq)->sense;
474
475 if (reqbuf->sense_key == UNIT_ATTENTION)
476 cdrom_saw_media_change(drive);
477 else if (reqbuf->sense_key == NOT_READY &&
478 reqbuf->asc == 4 && reqbuf->ascq != 4) {
479 /*
480 * The drive is in the process of loading
481 * a disk. Retry, but wait a little to give
482 * the drive time to complete the load.
483 */
484 delay = true;
485 } else {
486 /* otherwise, don't retry */
487 retries = 0;
488 }
489 --retries;
490 }
491 blk_put_request(rq);
492 if (delay)
493 ssleep(2);
494 } while (failed && retries >= 0);
495
496 /* return an error if the command failed */
497 return failed ? -EIO : 0;
498 }
499
500 /*
501 * returns true if rq has been completed
502 */
503 static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
504 {
505 unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
506
507 if (cmd->tf_flags & IDE_TFLAG_WRITE)
508 nr_bytes -= cmd->last_xfer_len;
509
510 if (nr_bytes > 0) {
511 ide_complete_rq(drive, BLK_STS_OK, nr_bytes);
512 return true;
513 }
514
515 return false;
516 }
517
518 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
519 {
520 ide_hwif_t *hwif = drive->hwif;
521 struct ide_cmd *cmd = &hwif->cmd;
522 struct request *rq = hwif->rq;
523 ide_expiry_t *expiry = NULL;
524 int dma_error = 0, dma, thislen, uptodate = 0;
525 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
526 int sense = ata_sense_request(rq);
527 unsigned int timeout;
528 u16 len;
529 u8 ireason, stat;
530
531 ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
532
533 /* check for errors */
534 dma = drive->dma;
535 if (dma) {
536 drive->dma = 0;
537 drive->waiting_for_dma = 0;
538 dma_error = hwif->dma_ops->dma_end(drive);
539 ide_dma_unmap_sg(drive, cmd);
540 if (dma_error) {
541 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
542 write ? "write" : "read");
543 ide_dma_off(drive);
544 }
545 }
546
547 /* check status */
548 stat = hwif->tp_ops->read_status(hwif);
549
550 if (!OK_STAT(stat, 0, BAD_R_STAT)) {
551 rc = cdrom_decode_status(drive, stat);
552 if (rc) {
553 if (rc == 2)
554 goto out_end;
555 return ide_stopped;
556 }
557 }
558
559 /* using dma, transfer is complete now */
560 if (dma) {
561 if (dma_error)
562 return ide_error(drive, "dma error", stat);
563 uptodate = 1;
564 goto out_end;
565 }
566
567 ide_read_bcount_and_ireason(drive, &len, &ireason);
568
569 thislen = !blk_rq_is_passthrough(rq) ? len : cmd->nleft;
570 if (thislen > len)
571 thislen = len;
572
573 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
574 stat, thislen);
575
576 /* If DRQ is clear, the command has completed. */
577 if ((stat & ATA_DRQ) == 0) {
578 switch (req_op(rq)) {
579 default:
580 /*
581 * If we're not done reading/writing, complain.
582 * Otherwise, complete the command normally.
583 */
584 uptodate = 1;
585 if (cmd->nleft > 0) {
586 printk(KERN_ERR PFX "%s: %s: data underrun "
587 "(%u bytes)\n", drive->name, __func__,
588 cmd->nleft);
589 if (!write)
590 rq->rq_flags |= RQF_FAILED;
591 uptodate = 0;
592 }
593 goto out_end;
594 case REQ_OP_DRV_IN:
595 case REQ_OP_DRV_OUT:
596 ide_cd_request_sense_fixup(drive, cmd);
597
598 uptodate = cmd->nleft ? 0 : 1;
599
600 /*
601 * suck out the remaining bytes from the drive in an
602 * attempt to complete the data xfer. (see BZ#13399)
603 */
604 if (!(stat & ATA_ERR) && !uptodate && thislen) {
605 ide_pio_bytes(drive, cmd, write, thislen);
606 uptodate = cmd->nleft ? 0 : 1;
607 }
608
609 if (!uptodate)
610 rq->rq_flags |= RQF_FAILED;
611 goto out_end;
612 case REQ_OP_SCSI_IN:
613 case REQ_OP_SCSI_OUT:
614 goto out_end;
615 }
616 }
617
618 rc = ide_check_ireason(drive, rq, len, ireason, write);
619 if (rc)
620 goto out_end;
621
622 cmd->last_xfer_len = 0;
623
624 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
625 "ireason: 0x%x",
626 rq->cmd_type, ireason);
627
628 /* transfer data */
629 while (thislen > 0) {
630 int blen = min_t(int, thislen, cmd->nleft);
631
632 if (cmd->nleft == 0)
633 break;
634
635 ide_pio_bytes(drive, cmd, write, blen);
636 cmd->last_xfer_len += blen;
637
638 thislen -= blen;
639 len -= blen;
640
641 if (sense && write == 0)
642 scsi_req(rq)->sense_len += blen;
643 }
644
645 /* pad, if necessary */
646 if (len > 0) {
647 if (blk_rq_is_passthrough(rq) || write == 0)
648 ide_pad_transfer(drive, write, len);
649 else {
650 printk(KERN_ERR PFX "%s: confused, missing data\n",
651 drive->name);
652 blk_dump_rq_flags(rq, "cdrom_newpc_intr");
653 }
654 }
655
656 switch (req_op(rq)) {
657 case REQ_OP_SCSI_IN:
658 case REQ_OP_SCSI_OUT:
659 timeout = rq->timeout;
660 break;
661 case REQ_OP_DRV_IN:
662 case REQ_OP_DRV_OUT:
663 expiry = ide_cd_expiry;
664 /*FALLTHRU*/
665 default:
666 timeout = ATAPI_WAIT_PC;
667 break;
668 }
669
670 hwif->expiry = expiry;
671 ide_set_handler(drive, cdrom_newpc_intr, timeout);
672 return ide_started;
673
674 out_end:
675 if (blk_rq_is_scsi(rq) && rc == 0) {
676 scsi_req(rq)->resid_len = 0;
677 blk_end_request_all(rq, BLK_STS_OK);
678 hwif->rq = NULL;
679 } else {
680 if (sense && uptodate)
681 ide_cd_complete_failed_rq(drive, rq);
682
683 if (!blk_rq_is_passthrough(rq)) {
684 if (cmd->nleft == 0)
685 uptodate = 1;
686 } else {
687 if (uptodate <= 0 && scsi_req(rq)->result == 0)
688 scsi_req(rq)->result = -EIO;
689 }
690
691 if (uptodate == 0 && rq->bio)
692 if (ide_cd_error_cmd(drive, cmd))
693 return ide_stopped;
694
695 /* make sure it's fully ended */
696 if (blk_rq_is_passthrough(rq)) {
697 scsi_req(rq)->resid_len -= cmd->nbytes - cmd->nleft;
698 if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
699 scsi_req(rq)->resid_len += cmd->last_xfer_len;
700 }
701
702 ide_complete_rq(drive, uptodate ? BLK_STS_OK : BLK_STS_IOERR, blk_rq_bytes(rq));
703
704 if (sense && rc == 2)
705 ide_error(drive, "request sense failure", stat);
706 }
707 return ide_stopped;
708 }
709
710 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
711 {
712 struct cdrom_info *cd = drive->driver_data;
713 struct request_queue *q = drive->queue;
714 int write = rq_data_dir(rq) == WRITE;
715 unsigned short sectors_per_frame =
716 queue_logical_block_size(q) >> SECTOR_BITS;
717
718 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
719 "secs_per_frame: %u",
720 rq->cmd[0], rq->cmd_flags, sectors_per_frame);
721
722 if (write) {
723 /* disk has become write protected */
724 if (get_disk_ro(cd->disk))
725 return ide_stopped;
726 } else {
727 /*
728 * We may be retrying this request after an error. Fix up any
729 * weirdness which might be present in the request packet.
730 */
731 q->prep_rq_fn(q, rq);
732 }
733
734 /* fs requests *must* be hardware frame aligned */
735 if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
736 (blk_rq_pos(rq) & (sectors_per_frame - 1)))
737 return ide_stopped;
738
739 /* use DMA, if possible */
740 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
741
742 if (write)
743 cd->devinfo.media_written = 1;
744
745 rq->timeout = ATAPI_WAIT_PC;
746
747 return ide_started;
748 }
749
750 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
751 {
752
753 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
754 rq->cmd[0], rq->cmd_type);
755
756 if (blk_rq_is_scsi(rq))
757 rq->rq_flags |= RQF_QUIET;
758 else
759 rq->rq_flags &= ~RQF_FAILED;
760
761 drive->dma = 0;
762
763 /* sg request */
764 if (rq->bio) {
765 struct request_queue *q = drive->queue;
766 char *buf = bio_data(rq->bio);
767 unsigned int alignment;
768
769 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
770
771 /*
772 * check if dma is safe
773 *
774 * NOTE! The "len" and "addr" checks should possibly have
775 * separate masks.
776 */
777 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
778 if ((unsigned long)buf & alignment
779 || blk_rq_bytes(rq) & q->dma_pad_mask
780 || object_is_on_stack(buf))
781 drive->dma = 0;
782 }
783 }
784
785 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
786 sector_t block)
787 {
788 struct ide_cmd cmd;
789 int uptodate = 0;
790 unsigned int nsectors;
791
792 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
793 rq->cmd[0], (unsigned long long)block);
794
795 if (drive->debug_mask & IDE_DBG_RQ)
796 blk_dump_rq_flags(rq, "ide_cd_do_request");
797
798 switch (req_op(rq)) {
799 default:
800 if (cdrom_start_rw(drive, rq) == ide_stopped)
801 goto out_end;
802 break;
803 case REQ_OP_SCSI_IN:
804 case REQ_OP_SCSI_OUT:
805 handle_pc:
806 if (!rq->timeout)
807 rq->timeout = ATAPI_WAIT_PC;
808 cdrom_do_block_pc(drive, rq);
809 break;
810 case REQ_OP_DRV_IN:
811 case REQ_OP_DRV_OUT:
812 switch (ide_req(rq)->type) {
813 case ATA_PRIV_MISC:
814 /* right now this can only be a reset... */
815 uptodate = 1;
816 goto out_end;
817 case ATA_PRIV_SENSE:
818 case ATA_PRIV_PC:
819 goto handle_pc;
820 default:
821 BUG();
822 }
823 }
824
825 /* prepare sense request for this command */
826 ide_prep_sense(drive, rq);
827
828 memset(&cmd, 0, sizeof(cmd));
829
830 if (rq_data_dir(rq))
831 cmd.tf_flags |= IDE_TFLAG_WRITE;
832
833 cmd.rq = rq;
834
835 if (!blk_rq_is_passthrough(rq) || blk_rq_bytes(rq)) {
836 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
837 ide_map_sg(drive, &cmd);
838 }
839
840 return ide_issue_pc(drive, &cmd);
841 out_end:
842 nsectors = blk_rq_sectors(rq);
843
844 if (nsectors == 0)
845 nsectors = 1;
846
847 ide_complete_rq(drive, uptodate ? BLK_STS_OK : BLK_STS_IOERR, nsectors << 9);
848
849 return ide_stopped;
850 }
851
852 /*
853 * Ioctl handling.
854 *
855 * Routines which queue packet commands take as a final argument a pointer to a
856 * request_sense struct. If execution of the command results in an error with a
857 * CHECK CONDITION status, this structure will be filled with the results of the
858 * subsequent request sense command. The pointer can also be NULL, in which case
859 * no sense information is returned.
860 */
861 static void msf_from_bcd(struct atapi_msf *msf)
862 {
863 msf->minute = bcd2bin(msf->minute);
864 msf->second = bcd2bin(msf->second);
865 msf->frame = bcd2bin(msf->frame);
866 }
867
868 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
869 {
870 struct cdrom_info *info = drive->driver_data;
871 struct cdrom_device_info *cdi = &info->devinfo;
872 unsigned char cmd[BLK_MAX_CDB];
873
874 ide_debug_log(IDE_DBG_FUNC, "enter");
875
876 memset(cmd, 0, BLK_MAX_CDB);
877 cmd[0] = GPCMD_TEST_UNIT_READY;
878
879 /*
880 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
881 * instead of supporting the LOAD_UNLOAD opcode.
882 */
883 cmd[7] = cdi->sanyo_slot % 3;
884
885 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, RQF_QUIET);
886 }
887
888 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
889 unsigned long *sectors_per_frame,
890 struct request_sense *sense)
891 {
892 struct {
893 __be32 lba;
894 __be32 blocklen;
895 } capbuf;
896
897 int stat;
898 unsigned char cmd[BLK_MAX_CDB];
899 unsigned len = sizeof(capbuf);
900 u32 blocklen;
901
902 ide_debug_log(IDE_DBG_FUNC, "enter");
903
904 memset(cmd, 0, BLK_MAX_CDB);
905 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
906
907 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
908 RQF_QUIET);
909 if (stat)
910 return stat;
911
912 /*
913 * Sanity check the given block size, in so far as making
914 * sure the sectors_per_frame we give to the caller won't
915 * end up being bogus.
916 */
917 blocklen = be32_to_cpu(capbuf.blocklen);
918 blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS;
919 switch (blocklen) {
920 case 512:
921 case 1024:
922 case 2048:
923 case 4096:
924 break;
925 default:
926 printk_once(KERN_ERR PFX "%s: weird block size %u; "
927 "setting default block size to 2048\n",
928 drive->name, blocklen);
929 blocklen = 2048;
930 break;
931 }
932
933 *capacity = 1 + be32_to_cpu(capbuf.lba);
934 *sectors_per_frame = blocklen >> SECTOR_BITS;
935
936 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
937 *capacity, *sectors_per_frame);
938
939 return 0;
940 }
941
942 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
943 int format, char *buf, int buflen,
944 struct request_sense *sense)
945 {
946 unsigned char cmd[BLK_MAX_CDB];
947
948 ide_debug_log(IDE_DBG_FUNC, "enter");
949
950 memset(cmd, 0, BLK_MAX_CDB);
951
952 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
953 cmd[6] = trackno;
954 cmd[7] = (buflen >> 8);
955 cmd[8] = (buflen & 0xff);
956 cmd[9] = (format << 6);
957
958 if (msf_flag)
959 cmd[1] = 2;
960
961 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, RQF_QUIET);
962 }
963
964 /* Try to read the entire TOC for the disk into our internal buffer. */
965 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
966 {
967 int stat, ntracks, i;
968 struct cdrom_info *info = drive->driver_data;
969 struct cdrom_device_info *cdi = &info->devinfo;
970 struct atapi_toc *toc = info->toc;
971 struct {
972 struct atapi_toc_header hdr;
973 struct atapi_toc_entry ent;
974 } ms_tmp;
975 long last_written;
976 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
977
978 ide_debug_log(IDE_DBG_FUNC, "enter");
979
980 if (toc == NULL) {
981 /* try to allocate space */
982 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
983 if (toc == NULL) {
984 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
985 drive->name);
986 return -ENOMEM;
987 }
988 info->toc = toc;
989 }
990
991 /*
992 * Check to see if the existing data is still valid. If it is,
993 * just return.
994 */
995 (void) cdrom_check_status(drive, sense);
996
997 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
998 return 0;
999
1000 /* try to get the total cdrom capacity and sector size */
1001 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1002 sense);
1003 if (stat)
1004 toc->capacity = 0x1fffff;
1005
1006 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1007 /* save a private copy of the TOC capacity for error handling */
1008 drive->probed_capacity = toc->capacity * sectors_per_frame;
1009
1010 blk_queue_logical_block_size(drive->queue,
1011 sectors_per_frame << SECTOR_BITS);
1012
1013 /* first read just the header, so we know how long the TOC is */
1014 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1015 sizeof(struct atapi_toc_header), sense);
1016 if (stat)
1017 return stat;
1018
1019 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1020 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1021 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1022 }
1023
1024 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1025 if (ntracks <= 0)
1026 return -EIO;
1027 if (ntracks > MAX_TRACKS)
1028 ntracks = MAX_TRACKS;
1029
1030 /* now read the whole schmeer */
1031 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1032 (char *)&toc->hdr,
1033 sizeof(struct atapi_toc_header) +
1034 (ntracks + 1) *
1035 sizeof(struct atapi_toc_entry), sense);
1036
1037 if (stat && toc->hdr.first_track > 1) {
1038 /*
1039 * Cds with CDI tracks only don't have any TOC entries, despite
1040 * of this the returned values are
1041 * first_track == last_track = number of CDI tracks + 1,
1042 * so that this case is indistinguishable from the same layout
1043 * plus an additional audio track. If we get an error for the
1044 * regular case, we assume a CDI without additional audio
1045 * tracks. In this case the readable TOC is empty (CDI tracks
1046 * are not included) and only holds the Leadout entry.
1047 *
1048 * Heiko Eißfeldt.
1049 */
1050 ntracks = 0;
1051 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1052 (char *)&toc->hdr,
1053 sizeof(struct atapi_toc_header) +
1054 (ntracks + 1) *
1055 sizeof(struct atapi_toc_entry),
1056 sense);
1057 if (stat)
1058 return stat;
1059
1060 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1061 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1062 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1063 } else {
1064 toc->hdr.first_track = CDROM_LEADOUT;
1065 toc->hdr.last_track = CDROM_LEADOUT;
1066 }
1067 }
1068
1069 if (stat)
1070 return stat;
1071
1072 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1073
1074 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1075 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1076 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1077 }
1078
1079 for (i = 0; i <= ntracks; i++) {
1080 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1081 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1082 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1083 msf_from_bcd(&toc->ent[i].addr.msf);
1084 }
1085 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1086 toc->ent[i].addr.msf.second,
1087 toc->ent[i].addr.msf.frame);
1088 }
1089
1090 if (toc->hdr.first_track != CDROM_LEADOUT) {
1091 /* read the multisession information */
1092 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1093 sizeof(ms_tmp), sense);
1094 if (stat)
1095 return stat;
1096
1097 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1098 } else {
1099 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1100 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1101 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1102 }
1103
1104 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1105 /* re-read multisession information using MSF format */
1106 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1107 sizeof(ms_tmp), sense);
1108 if (stat)
1109 return stat;
1110
1111 msf_from_bcd(&ms_tmp.ent.addr.msf);
1112 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1113 ms_tmp.ent.addr.msf.second,
1114 ms_tmp.ent.addr.msf.frame);
1115 }
1116
1117 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1118
1119 /* now try to get the total cdrom capacity */
1120 stat = cdrom_get_last_written(cdi, &last_written);
1121 if (!stat && (last_written > toc->capacity)) {
1122 toc->capacity = last_written;
1123 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1124 drive->probed_capacity = toc->capacity * sectors_per_frame;
1125 }
1126
1127 /* Remember that we've read this stuff. */
1128 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1129
1130 return 0;
1131 }
1132
1133 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1134 {
1135 struct cdrom_info *info = drive->driver_data;
1136 struct cdrom_device_info *cdi = &info->devinfo;
1137 struct packet_command cgc;
1138 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1139
1140 ide_debug_log(IDE_DBG_FUNC, "enter");
1141
1142 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1143 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1144
1145 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1146 do {
1147 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1148 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1149 if (!stat)
1150 break;
1151 } while (--attempts);
1152 return stat;
1153 }
1154
1155 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1156 {
1157 struct cdrom_info *cd = drive->driver_data;
1158 u16 curspeed, maxspeed;
1159
1160 ide_debug_log(IDE_DBG_FUNC, "enter");
1161
1162 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1163 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1164 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1165 } else {
1166 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1167 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1168 }
1169
1170 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1171 curspeed, maxspeed);
1172
1173 cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
1174 cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
1175 }
1176
1177 #define IDE_CD_CAPABILITIES \
1178 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1179 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1180 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1181 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1182 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1183
1184 static const struct cdrom_device_ops ide_cdrom_dops = {
1185 .open = ide_cdrom_open_real,
1186 .release = ide_cdrom_release_real,
1187 .drive_status = ide_cdrom_drive_status,
1188 .check_events = ide_cdrom_check_events_real,
1189 .tray_move = ide_cdrom_tray_move,
1190 .lock_door = ide_cdrom_lock_door,
1191 .select_speed = ide_cdrom_select_speed,
1192 .get_last_session = ide_cdrom_get_last_session,
1193 .get_mcn = ide_cdrom_get_mcn,
1194 .reset = ide_cdrom_reset,
1195 .audio_ioctl = ide_cdrom_audio_ioctl,
1196 .capability = IDE_CD_CAPABILITIES,
1197 .generic_packet = ide_cdrom_packet,
1198 };
1199
1200 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1201 {
1202 struct cdrom_info *info = drive->driver_data;
1203 struct cdrom_device_info *devinfo = &info->devinfo;
1204
1205 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1206
1207 devinfo->ops = &ide_cdrom_dops;
1208 devinfo->speed = info->current_speed;
1209 devinfo->capacity = nslots;
1210 devinfo->handle = drive;
1211 strcpy(devinfo->name, drive->name);
1212
1213 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1214 devinfo->mask |= CDC_SELECT_SPEED;
1215
1216 devinfo->disk = info->disk;
1217 return register_cdrom(devinfo);
1218 }
1219
1220 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1221 {
1222 struct cdrom_info *cd = drive->driver_data;
1223 struct cdrom_device_info *cdi = &cd->devinfo;
1224 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1225 mechtype_t mechtype;
1226 int nslots = 1;
1227
1228 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1229 drive->media, drive->atapi_flags);
1230
1231 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1232 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1233 CDC_MO_DRIVE | CDC_RAM);
1234
1235 if (drive->media == ide_optical) {
1236 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1237 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1238 drive->name);
1239 return nslots;
1240 }
1241
1242 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1243 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1244 cdi->mask &= ~CDC_PLAY_AUDIO;
1245 return nslots;
1246 }
1247
1248 /*
1249 * We have to cheat a little here. the packet will eventually be queued
1250 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1251 * Since this device hasn't been registered with the Uniform layer yet,
1252 * it can't do this. Same goes for cdi->ops.
1253 */
1254 cdi->handle = drive;
1255 cdi->ops = &ide_cdrom_dops;
1256
1257 if (ide_cdrom_get_capabilities(drive, buf))
1258 return 0;
1259
1260 if ((buf[8 + 6] & 0x01) == 0)
1261 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1262 if (buf[8 + 6] & 0x08)
1263 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1264 if (buf[8 + 3] & 0x01)
1265 cdi->mask &= ~CDC_CD_R;
1266 if (buf[8 + 3] & 0x02)
1267 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1268 if (buf[8 + 2] & 0x38)
1269 cdi->mask &= ~CDC_DVD;
1270 if (buf[8 + 3] & 0x20)
1271 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1272 if (buf[8 + 3] & 0x10)
1273 cdi->mask &= ~CDC_DVD_R;
1274 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1275 cdi->mask &= ~CDC_PLAY_AUDIO;
1276
1277 mechtype = buf[8 + 6] >> 5;
1278 if (mechtype == mechtype_caddy ||
1279 mechtype == mechtype_popup ||
1280 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1281 cdi->mask |= CDC_CLOSE_TRAY;
1282
1283 if (cdi->sanyo_slot > 0) {
1284 cdi->mask &= ~CDC_SELECT_DISC;
1285 nslots = 3;
1286 } else if (mechtype == mechtype_individual_changer ||
1287 mechtype == mechtype_cartridge_changer) {
1288 nslots = cdrom_number_of_slots(cdi);
1289 if (nslots > 1)
1290 cdi->mask &= ~CDC_SELECT_DISC;
1291 }
1292
1293 ide_cdrom_update_speed(drive, buf);
1294
1295 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1296
1297 /* don't print speed if the drive reported 0 */
1298 if (cd->max_speed)
1299 printk(KERN_CONT " %dX", cd->max_speed);
1300
1301 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1302
1303 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1304 printk(KERN_CONT " DVD%s%s",
1305 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1306 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1307
1308 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1309 printk(KERN_CONT " CD%s%s",
1310 (cdi->mask & CDC_CD_R) ? "" : "-R",
1311 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1312
1313 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1314 printk(KERN_CONT " changer w/%d slots", nslots);
1315 else
1316 printk(KERN_CONT " drive");
1317
1318 printk(KERN_CONT ", %dkB Cache\n",
1319 be16_to_cpup((__be16 *)&buf[8 + 12]));
1320
1321 return nslots;
1322 }
1323
1324 /* standard prep_rq_fn that builds 10 byte cmds */
1325 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1326 {
1327 int hard_sect = queue_logical_block_size(q);
1328 long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
1329 unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
1330 struct scsi_request *req = scsi_req(rq);
1331
1332 memset(req->cmd, 0, BLK_MAX_CDB);
1333
1334 if (rq_data_dir(rq) == READ)
1335 req->cmd[0] = GPCMD_READ_10;
1336 else
1337 req->cmd[0] = GPCMD_WRITE_10;
1338
1339 /*
1340 * fill in lba
1341 */
1342 req->cmd[2] = (block >> 24) & 0xff;
1343 req->cmd[3] = (block >> 16) & 0xff;
1344 req->cmd[4] = (block >> 8) & 0xff;
1345 req->cmd[5] = block & 0xff;
1346
1347 /*
1348 * and transfer length
1349 */
1350 req->cmd[7] = (blocks >> 8) & 0xff;
1351 req->cmd[8] = blocks & 0xff;
1352 req->cmd_len = 10;
1353 return BLKPREP_OK;
1354 }
1355
1356 /*
1357 * Most of the SCSI commands are supported directly by ATAPI devices.
1358 * This transform handles the few exceptions.
1359 */
1360 static int ide_cdrom_prep_pc(struct request *rq)
1361 {
1362 u8 *c = scsi_req(rq)->cmd;
1363
1364 /* transform 6-byte read/write commands to the 10-byte version */
1365 if (c[0] == READ_6 || c[0] == WRITE_6) {
1366 c[8] = c[4];
1367 c[5] = c[3];
1368 c[4] = c[2];
1369 c[3] = c[1] & 0x1f;
1370 c[2] = 0;
1371 c[1] &= 0xe0;
1372 c[0] += (READ_10 - READ_6);
1373 scsi_req(rq)->cmd_len = 10;
1374 return BLKPREP_OK;
1375 }
1376
1377 /*
1378 * it's silly to pretend we understand 6-byte sense commands, just
1379 * reject with ILLEGAL_REQUEST and the caller should take the
1380 * appropriate action
1381 */
1382 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1383 scsi_req(rq)->result = ILLEGAL_REQUEST;
1384 return BLKPREP_KILL;
1385 }
1386
1387 return BLKPREP_OK;
1388 }
1389
1390 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1391 {
1392 if (!blk_rq_is_passthrough(rq))
1393 return ide_cdrom_prep_fs(q, rq);
1394 else if (blk_rq_is_scsi(rq))
1395 return ide_cdrom_prep_pc(rq);
1396
1397 return 0;
1398 }
1399
1400 struct cd_list_entry {
1401 const char *id_model;
1402 const char *id_firmware;
1403 unsigned int cd_flags;
1404 };
1405
1406 #ifdef CONFIG_IDE_PROC_FS
1407 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1408 {
1409 unsigned long capacity, sectors_per_frame;
1410
1411 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1412 return 0;
1413
1414 return capacity * sectors_per_frame;
1415 }
1416
1417 static int idecd_capacity_proc_show(struct seq_file *m, void *v)
1418 {
1419 ide_drive_t *drive = m->private;
1420
1421 seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
1422 return 0;
1423 }
1424
1425 static int idecd_capacity_proc_open(struct inode *inode, struct file *file)
1426 {
1427 return single_open(file, idecd_capacity_proc_show, PDE_DATA(inode));
1428 }
1429
1430 static const struct file_operations idecd_capacity_proc_fops = {
1431 .owner = THIS_MODULE,
1432 .open = idecd_capacity_proc_open,
1433 .read = seq_read,
1434 .llseek = seq_lseek,
1435 .release = single_release,
1436 };
1437
1438 static ide_proc_entry_t idecd_proc[] = {
1439 { "capacity", S_IFREG|S_IRUGO, &idecd_capacity_proc_fops },
1440 {}
1441 };
1442
1443 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1444 {
1445 return idecd_proc;
1446 }
1447
1448 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1449 {
1450 return NULL;
1451 }
1452 #endif
1453
1454 static const struct cd_list_entry ide_cd_quirks_list[] = {
1455 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1456 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1457 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1458 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1459 IDE_AFLAG_PRE_ATAPI12, },
1460 /* Vertos 300, some versions of this drive like to talk BCD. */
1461 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1462 /* Vertos 600 ESD. */
1463 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1464 /*
1465 * Sanyo 3 CD changer uses a non-standard command for CD changing
1466 * (by default standard ATAPI support for CD changers is used).
1467 */
1468 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1469 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1470 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1471 /* Stingray 8X CD-ROM. */
1472 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1473 /*
1474 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1475 * mode sense page capabilities size, but older drives break.
1476 */
1477 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1478 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1479 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1480 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1481 /*
1482 * Some drives used by Apple don't advertise audio play
1483 * but they do support reading TOC & audio datas.
1484 */
1485 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1486 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1487 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1488 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1489 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1490 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1491 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1492 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1493 { NULL, NULL, 0 }
1494 };
1495
1496 static unsigned int ide_cd_flags(u16 *id)
1497 {
1498 const struct cd_list_entry *cle = ide_cd_quirks_list;
1499
1500 while (cle->id_model) {
1501 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1502 (cle->id_firmware == NULL ||
1503 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1504 return cle->cd_flags;
1505 cle++;
1506 }
1507
1508 return 0;
1509 }
1510
1511 static int ide_cdrom_setup(ide_drive_t *drive)
1512 {
1513 struct cdrom_info *cd = drive->driver_data;
1514 struct cdrom_device_info *cdi = &cd->devinfo;
1515 struct request_queue *q = drive->queue;
1516 u16 *id = drive->id;
1517 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1518 int nslots;
1519
1520 ide_debug_log(IDE_DBG_PROBE, "enter");
1521
1522 blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1523 blk_queue_dma_alignment(q, 31);
1524 blk_queue_update_dma_pad(q, 15);
1525
1526 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1527 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1528
1529 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1530 fw_rev[4] == '1' && fw_rev[6] <= '2')
1531 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1532 IDE_AFLAG_TOCADDR_AS_BCD);
1533 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1534 fw_rev[4] == '1' && fw_rev[6] <= '2')
1535 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1536 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1537 /* 3 => use CD in slot 0 */
1538 cdi->sanyo_slot = 3;
1539
1540 nslots = ide_cdrom_probe_capabilities(drive);
1541
1542 blk_queue_logical_block_size(q, CD_FRAMESIZE);
1543
1544 if (ide_cdrom_register(drive, nslots)) {
1545 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1546 " cdrom driver.\n", drive->name, __func__);
1547 cd->devinfo.handle = NULL;
1548 return 1;
1549 }
1550
1551 ide_proc_register_driver(drive, cd->driver);
1552 return 0;
1553 }
1554
1555 static void ide_cd_remove(ide_drive_t *drive)
1556 {
1557 struct cdrom_info *info = drive->driver_data;
1558
1559 ide_debug_log(IDE_DBG_FUNC, "enter");
1560
1561 ide_proc_unregister_driver(drive, info->driver);
1562 device_del(&info->dev);
1563 del_gendisk(info->disk);
1564
1565 mutex_lock(&idecd_ref_mutex);
1566 put_device(&info->dev);
1567 mutex_unlock(&idecd_ref_mutex);
1568 }
1569
1570 static void ide_cd_release(struct device *dev)
1571 {
1572 struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1573 struct cdrom_device_info *devinfo = &info->devinfo;
1574 ide_drive_t *drive = info->drive;
1575 struct gendisk *g = info->disk;
1576
1577 ide_debug_log(IDE_DBG_FUNC, "enter");
1578
1579 kfree(info->toc);
1580 if (devinfo->handle == drive)
1581 unregister_cdrom(devinfo);
1582 drive->driver_data = NULL;
1583 blk_queue_prep_rq(drive->queue, NULL);
1584 g->private_data = NULL;
1585 put_disk(g);
1586 kfree(info);
1587 }
1588
1589 static int ide_cd_probe(ide_drive_t *);
1590
1591 static struct ide_driver ide_cdrom_driver = {
1592 .gen_driver = {
1593 .owner = THIS_MODULE,
1594 .name = "ide-cdrom",
1595 .bus = &ide_bus_type,
1596 },
1597 .probe = ide_cd_probe,
1598 .remove = ide_cd_remove,
1599 .version = IDECD_VERSION,
1600 .do_request = ide_cd_do_request,
1601 #ifdef CONFIG_IDE_PROC_FS
1602 .proc_entries = ide_cd_proc_entries,
1603 .proc_devsets = ide_cd_proc_devsets,
1604 #endif
1605 };
1606
1607 static int idecd_open(struct block_device *bdev, fmode_t mode)
1608 {
1609 struct cdrom_info *info;
1610 int rc = -ENXIO;
1611
1612 mutex_lock(&ide_cd_mutex);
1613 info = ide_cd_get(bdev->bd_disk);
1614 if (!info)
1615 goto out;
1616
1617 rc = cdrom_open(&info->devinfo, bdev, mode);
1618 if (rc < 0)
1619 ide_cd_put(info);
1620 out:
1621 mutex_unlock(&ide_cd_mutex);
1622 return rc;
1623 }
1624
1625 static void idecd_release(struct gendisk *disk, fmode_t mode)
1626 {
1627 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1628
1629 mutex_lock(&ide_cd_mutex);
1630 cdrom_release(&info->devinfo, mode);
1631
1632 ide_cd_put(info);
1633 mutex_unlock(&ide_cd_mutex);
1634 }
1635
1636 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1637 {
1638 struct packet_command cgc;
1639 char buffer[16];
1640 int stat;
1641 char spindown;
1642
1643 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1644 return -EFAULT;
1645
1646 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1647
1648 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1649 if (stat)
1650 return stat;
1651
1652 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1653 return cdrom_mode_select(cdi, &cgc);
1654 }
1655
1656 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1657 {
1658 struct packet_command cgc;
1659 char buffer[16];
1660 int stat;
1661 char spindown;
1662
1663 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1664
1665 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1666 if (stat)
1667 return stat;
1668
1669 spindown = buffer[11] & 0x0f;
1670 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1671 return -EFAULT;
1672 return 0;
1673 }
1674
1675 static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1676 unsigned int cmd, unsigned long arg)
1677 {
1678 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1679 int err;
1680
1681 switch (cmd) {
1682 case CDROMSETSPINDOWN:
1683 return idecd_set_spindown(&info->devinfo, arg);
1684 case CDROMGETSPINDOWN:
1685 return idecd_get_spindown(&info->devinfo, arg);
1686 default:
1687 break;
1688 }
1689
1690 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1691 if (err == -EINVAL)
1692 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1693
1694 return err;
1695 }
1696
1697 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1698 unsigned int cmd, unsigned long arg)
1699 {
1700 int ret;
1701
1702 mutex_lock(&ide_cd_mutex);
1703 ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
1704 mutex_unlock(&ide_cd_mutex);
1705
1706 return ret;
1707 }
1708
1709
1710 static unsigned int idecd_check_events(struct gendisk *disk,
1711 unsigned int clearing)
1712 {
1713 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1714 return cdrom_check_events(&info->devinfo, clearing);
1715 }
1716
1717 static int idecd_revalidate_disk(struct gendisk *disk)
1718 {
1719 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1720 struct request_sense sense;
1721
1722 ide_cd_read_toc(info->drive, &sense);
1723
1724 return 0;
1725 }
1726
1727 static const struct block_device_operations idecd_ops = {
1728 .owner = THIS_MODULE,
1729 .open = idecd_open,
1730 .release = idecd_release,
1731 .ioctl = idecd_ioctl,
1732 .check_events = idecd_check_events,
1733 .revalidate_disk = idecd_revalidate_disk
1734 };
1735
1736 /* module options */
1737 static unsigned long debug_mask;
1738 module_param(debug_mask, ulong, 0644);
1739
1740 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1741
1742 static int ide_cd_probe(ide_drive_t *drive)
1743 {
1744 struct cdrom_info *info;
1745 struct gendisk *g;
1746 struct request_sense sense;
1747
1748 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1749 drive->driver_req, drive->media);
1750
1751 if (!strstr("ide-cdrom", drive->driver_req))
1752 goto failed;
1753
1754 if (drive->media != ide_cdrom && drive->media != ide_optical)
1755 goto failed;
1756
1757 drive->debug_mask = debug_mask;
1758 drive->irq_handler = cdrom_newpc_intr;
1759
1760 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1761 if (info == NULL) {
1762 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1763 drive->name);
1764 goto failed;
1765 }
1766
1767 g = alloc_disk(1 << PARTN_BITS);
1768 if (!g)
1769 goto out_free_cd;
1770
1771 ide_init_disk(g, drive);
1772
1773 info->dev.parent = &drive->gendev;
1774 info->dev.release = ide_cd_release;
1775 dev_set_name(&info->dev, "%s", dev_name(&drive->gendev));
1776
1777 if (device_register(&info->dev))
1778 goto out_free_disk;
1779
1780 info->drive = drive;
1781 info->driver = &ide_cdrom_driver;
1782 info->disk = g;
1783
1784 g->private_data = &info->driver;
1785
1786 drive->driver_data = info;
1787
1788 g->minors = 1;
1789 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1790 if (ide_cdrom_setup(drive)) {
1791 put_device(&info->dev);
1792 goto failed;
1793 }
1794
1795 ide_cd_read_toc(drive, &sense);
1796 g->fops = &idecd_ops;
1797 g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
1798 device_add_disk(&drive->gendev, g);
1799 return 0;
1800
1801 out_free_disk:
1802 put_disk(g);
1803 out_free_cd:
1804 kfree(info);
1805 failed:
1806 return -ENODEV;
1807 }
1808
1809 static void __exit ide_cdrom_exit(void)
1810 {
1811 driver_unregister(&ide_cdrom_driver.gen_driver);
1812 }
1813
1814 static int __init ide_cdrom_init(void)
1815 {
1816 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1817 return driver_register(&ide_cdrom_driver.gen_driver);
1818 }
1819
1820 MODULE_ALIAS("ide:*m-cdrom*");
1821 MODULE_ALIAS("ide-cd");
1822 module_init(ide_cdrom_init);
1823 module_exit(ide_cdrom_exit);
1824 MODULE_LICENSE("GPL");
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