projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mm: update get_user_pages_longterm to migrate pages allocated from CMA region
[linux-2.6-block.git] / drivers / cdrom / cdrom.c
CommitLineData
f30c2269 1/* linux/drivers/cdrom/cdrom.c
1da177e4
LT		 2 Copyright (c) 1996, 1997 David A. van Leeuwen.
3 Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org>
4 Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk>
5
6 May be copied or modified under the terms of the GNU General Public
7 License. See linux/COPYING for more information.
8
9 Uniform CD-ROM driver for Linux.
10 See Documentation/cdrom/cdrom-standard.tex for usage information.
11
12 The routines in the file provide a uniform interface between the
13 software that uses CD-ROMs and the various low-level drivers that
14 actually talk to the hardware. Suggestions are welcome.
15 Patches that work are more welcome though. ;-)
16
17 To Do List:
18 ----------------------------------
19
20 -- Modify sysctl/proc interface. I plan on having one directory per
21 drive, with entries for outputing general drive information, and sysctl
22 based tunable parameters such as whether the tray should auto-close for
23 that drive. Suggestions (or patches) for this welcome!
24
25
26 Revision History
27 ----------------------------------
28 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl>
29 -- Initial version by David A. van Leeuwen. I don't have a detailed
30 changelog for the 1.x series, David?
31
322.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org>
25985edc 33 -- New maintainer! As David A. van Leeuwen has been too busy to actively
1da177e4
LT		 34 maintain and improve this driver, I am now carrying on the torch. If
35 you have a problem with this driver, please feel free to contact me.
36
37 -- Added (rudimentary) sysctl interface. I realize this is really weak
38 right now, and is _very_ badly implemented. It will be improved...
39
40 -- Modified CDROM_DISC_STATUS so that it is now incorporated into
41 the Uniform CD-ROM driver via the cdrom_count_tracks function.
42 The cdrom_count_tracks function helps resolve some of the false
43 assumptions of the CDROM_DISC_STATUS ioctl, and is also used to check
44 for the correct media type when mounting or playing audio from a CD.
45
46 -- Remove the calls to verify_area and only use the copy_from_user and
47 copy_to_user stuff, since these calls now provide their own memory
48 checking with the 2.1.x kernels.
49
50 -- Major update to return codes so that errors from low-level drivers
51 are passed on through (thanks to Gerd Knorr for pointing out this
52 problem).
53
54 -- Made it so if a function isn't implemented in a low-level driver,
55 ENOSYS is now returned instead of EINVAL.
56
57 -- Simplified some complex logic so that the source code is easier to read.
58
59 -- Other stuff I probably forgot to mention (lots of changes).
60
612.01 to 2.11 Dec 1997-Jan 1998
62 -- TO-DO! Write changelogs for 2.01 to 2.12.
63
642.12 Jan 24, 1998 -- Erik Andersen <andersee@debian.org>
65 -- Fixed a bug in the IOCTL_IN and IOCTL_OUT macros. It turns out that
66 copy_*_user does not return EFAULT on error, but instead returns the number
67 of bytes not copied. I was returning whatever non-zero stuff came back from
68 the copy_*_user functions directly, which would result in strange errors.
69
702.13 July 17, 1998 -- Erik Andersen <andersee@debian.org>
71 -- Fixed a bug in CDROM_SELECT_SPEED where you couldn't lower the speed
72 of the drive. Thanks to Tobias Ringstr|m <tori@prosolvia.se> for pointing
73 this out and providing a simple fix.
74 -- Fixed the procfs-unload-module bug with the fill_inode procfs callback.
75 thanks to Andrea Arcangeli
76 -- Fixed it so that the /proc entry now also shows up when cdrom is
77 compiled into the kernel. Before it only worked when loaded as a module.
78
79 2.14 August 17, 1998 -- Erik Andersen <andersee@debian.org>
80 -- Fixed a bug in cdrom_media_changed and handling of reporting that
81 the media had changed for devices that _don't_ implement media_changed.
82 Thanks to Grant R. Guenther <grant@torque.net> for spotting this bug.
83 -- Made a few things more pedanticly correct.
84
852.50 Oct 19, 1998 - Jens Axboe <axboe@image.dk>
86 -- New maintainers! Erik was too busy to continue the work on the driver,
87 so now Chris Zwilling <chris@cloudnet.com> and Jens Axboe <axboe@image.dk>
88 will do their best to follow in his footsteps
89
90 2.51 Dec 20, 1998 - Jens Axboe <axboe@image.dk>
91 -- Check if drive is capable of doing what we ask before blindly changing
92 cdi->options in various ioctl.
93 -- Added version to proc entry.
94
95 2.52 Jan 16, 1999 - Jens Axboe <axboe@image.dk>
96 -- Fixed an error in open_for_data where we would sometimes not return
97 the correct error value. Thanks Huba Gaspar <huba@softcell.hu>.
98 -- Fixed module usage count - usage was based on /proc/sys/dev
99 instead of /proc/sys/dev/cdrom. This could lead to an oops when other
100 modules had entries in dev. Feb 02 - real bug was in sysctl.c where
101 dev would be removed even though it was used. cdrom.c just illuminated
102 that bug.
103
104 2.53 Feb 22, 1999 - Jens Axboe <axboe@image.dk>
105 -- Fixup of several ioctl calls, in particular CDROM_SET_OPTIONS has
106 been "rewritten" because capabilities and options aren't in sync. They
107 should be...
108 -- Added CDROM_LOCKDOOR ioctl. Locks the door and keeps it that way.
109 -- Added CDROM_RESET ioctl.
110 -- Added CDROM_DEBUG ioctl. Enable debug messages on-the-fly.
111 -- Added CDROM_GET_CAPABILITY ioctl. This relieves userspace programs
112 from parsing /proc/sys/dev/cdrom/info.
113
114 2.54 Mar 15, 1999 - Jens Axboe <axboe@image.dk>
115 -- Check capability mask from low level driver when counting tracks as
116 per suggestion from Corey J. Scotts <cstotts@blue.weeg.uiowa.edu>.
117
118 2.55 Apr 25, 1999 - Jens Axboe <axboe@image.dk>
119 -- autoclose was mistakenly checked against CDC_OPEN_TRAY instead of
120 CDC_CLOSE_TRAY.
121 -- proc info didn't mask against capabilities mask.
122
123 3.00 Aug 5, 1999 - Jens Axboe <axboe@image.dk>
124 -- Unified audio ioctl handling across CD-ROM drivers. A lot of the
125 code was duplicated before. Drives that support the generic packet
126 interface are now being fed packets from here instead.
127 -- First attempt at adding support for MMC2 commands - for DVD and
128 CD-R(W) drives. Only the DVD parts are in now - the interface used is
129 the same as for the audio ioctls.
130 -- ioctl cleanups. if a drive couldn't play audio, it didn't get
131 a change to perform device specific ioctls as well.
132 -- Defined CDROM_CAN(CDC_XXX) for checking the capabilities.
133 -- Put in sysctl files for autoclose, autoeject, check_media, debug,
134 and lock.
135 -- /proc/sys/dev/cdrom/info has been updated to also contain info about
136 CD-Rx and DVD capabilities.
137 -- Now default to checking media type.
138 -- CDROM_SEND_PACKET ioctl added. The infrastructure was in place for
139 doing this anyway, with the generic_packet addition.
140
141 3.01 Aug 6, 1999 - Jens Axboe <axboe@image.dk>
142 -- Fix up the sysctl handling so that the option flags get set
143 correctly.
144 -- Fix up ioctl handling so the device specific ones actually get
145 called :).
146
147 3.02 Aug 8, 1999 - Jens Axboe <axboe@image.dk>
148 -- Fixed volume control on SCSI drives (or others with longer audio
149 page).
150 -- Fixed a couple of DVD minors. Thanks to Andrew T. Veliath
151 <andrewtv@usa.net> for telling me and for having defined the various
152 DVD structures and ioctls in the first place! He designed the original
153 DVD patches for ide-cd and while I rearranged and unified them, the
154 interface is still the same.
155
156 3.03 Sep 1, 1999 - Jens Axboe <axboe@image.dk>
157 -- Moved the rest of the audio ioctls from the CD-ROM drivers here. Only
158 CDROMREADTOCENTRY and CDROMREADTOCHDR are left.
159 -- Moved the CDROMREADxxx ioctls in here.
160 -- Defined the cdrom_get_last_written and cdrom_get_next_block as ioctls
161 and exported functions.
162 -- Erik Andersen <andersen@xmission.com> modified all SCMD_ commands
163 to now read GPCMD_ for the new generic packet interface. All low level
164 drivers are updated as well.
165 -- Various other cleanups.
166
167 3.04 Sep 12, 1999 - Jens Axboe <axboe@image.dk>
168 -- Fixed a couple of possible memory leaks (if an operation failed and
169 we didn't free the buffer before returning the error).
170 -- Integrated Uniform CD Changer handling from Richard Sharman
171 <rsharman@pobox.com>.
172 -- Defined CD_DVD and CD_CHANGER log levels.
173 -- Fixed the CDROMREADxxx ioctls.
174 -- CDROMPLAYTRKIND uses the GPCMD_PLAY_AUDIO_MSF command - too few
175 drives supported it. We lose the index part, however.
176 -- Small modifications to accommodate opens of /dev/hdc1, required
177 for ide-cd to handle multisession discs.
178 -- Export cdrom_mode_sense and cdrom_mode_select.
179 -- init_cdrom_command() for setting up a cgc command.
180
181 3.05 Oct 24, 1999 - Jens Axboe <axboe@image.dk>
182 -- Changed the interface for CDROM_SEND_PACKET. Before it was virtually
183 impossible to send the drive data in a sensible way.
184 -- Lowered stack usage in mmc_ioctl(), dvd_read_disckey(), and
185 dvd_read_manufact.
186 -- Added setup of write mode for packet writing.
187 -- Fixed CDDA ripping with cdda2wav - accept much larger requests of
188 number of frames and split the reads in blocks of 8.
189
190 3.06 Dec 13, 1999 - Jens Axboe <axboe@image.dk>
191 -- Added support for changing the region of DVD drives.
192 -- Added sense data to generic command.
193
194 3.07 Feb 2, 2000 - Jens Axboe <axboe@suse.de>
195 -- Do same "read header length" trick in cdrom_get_disc_info() as
196 we do in cdrom_get_track_info() -- some drive don't obey specs and
197 fail if they can't supply the full Mt Fuji size table.
198 -- Deleted stuff related to setting up write modes. It has a different
199 home now.
200 -- Clear header length in mode_select unconditionally.
201 -- Removed the register_disk() that was added, not needed here.
202
203 3.08 May 1, 2000 - Jens Axboe <axboe@suse.de>
204 -- Fix direction flag in setup_send_key and setup_report_key. This
205 gave some SCSI adapters problems.
206 -- Always return -EROFS for write opens
207 -- Convert to module_init/module_exit style init and remove some
208 of the #ifdef MODULE stuff
209 -- Fix several dvd errors - DVD_LU_SEND_ASF should pass agid,
210 DVD_HOST_SEND_RPC_STATE did not set buffer size in cdb, and
211 dvd_do_auth passed uninitialized data to drive because init_cdrom_command
212 did not clear a 0 sized buffer.
213
214 3.09 May 12, 2000 - Jens Axboe <axboe@suse.de>
215 -- Fix Video-CD on SCSI drives that don't support READ_CD command. In
216 that case switch block size and issue plain READ_10 again, then switch
217 back.
218
219 3.10 Jun 10, 2000 - Jens Axboe <axboe@suse.de>
220 -- Fix volume control on CD's - old SCSI-II drives now use their own
221 code, as doing MODE6 stuff in here is really not my intention.
222 -- Use READ_DISC_INFO for more reliable end-of-disc.
223
224 3.11 Jun 12, 2000 - Jens Axboe <axboe@suse.de>
225 -- Fix bug in getting rpc phase 2 region info.
226 -- Reinstate "correct" CDROMPLAYTRKIND
227
228 3.12 Oct 18, 2000 - Jens Axboe <axboe@suse.de>
229 -- Use quiet bit on packet commands not known to work
230
231 3.20 Dec 17, 2003 - Jens Axboe <axboe@suse.de>
232 -- Various fixes and lots of cleanups not listed :-)
233 -- Locking fixes
234 -- Mt Rainier support
235 -- DVD-RAM write open fixes
236
237 Nov 5 2001, Aug 8 2002. Modified by Andy Polyakov
238 <appro@fy.chalmers.se> to support MMC-3 compliant DVD+RW units.
239
240 Modified by Nigel Kukard <nkukard@lbsd.net> - support DVD+RW
241 2.4.x patch by Andy Polyakov <appro@fy.chalmers.se>
242
243-------------------------------------------------------------------------*/
244
e597cd09
JP		 245#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
246
1da177e4
LT		 247#define REVISION "Revision: 3.20"
248#define VERSION "Id: cdrom.c 3.20 2003/12/17"
249
250/* I use an error-log mask to give fine grain control over the type of
251 messages dumped to the system logs. The available masks include: */
252#define CD_NOTHING 0x0
253#define CD_WARNING 0x1
254#define CD_REG_UNREG 0x2
255#define CD_DO_IOCTL 0x4
256#define CD_OPEN 0x8
257#define CD_CLOSE 0x10
258#define CD_COUNT_TRACKS 0x20
259#define CD_CHANGER 0x40
260#define CD_DVD 0x80
261
262/* Define this to remove _all_ the debugging messages */
263/* #define ERRLOGMASK CD_NOTHING */
264#define ERRLOGMASK CD_WARNING
265/* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */
266/* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */
267
1da177e4
LT		 268#include <linux/module.h>
269#include <linux/fs.h>
1da177e4
LT		 270#include <linux/major.h>
271#include <linux/types.h>
272#include <linux/errno.h>
273#include <linux/kernel.h>
274#include <linux/mm.h>
275#include <linux/slab.h>
276#include <linux/cdrom.h>
277#include <linux/sysctl.h>
278#include <linux/proc_fs.h>
279#include <linux/blkpg.h>
280#include <linux/init.h>
281#include <linux/fcntl.h>
282#include <linux/blkdev.h>
283#include <linux/times.h>
7c0f6ba6 284#include <linux/uaccess.h>
4e178c17 285#include <scsi/scsi_common.h>
82ed4db4 286#include <scsi/scsi_request.h>
1da177e4
LT		 287
288/* used to tell the module to turn on full debugging messages */
90ab5ee9 289static bool debug;
1da177e4 290/* default compatibility mode */
90ab5ee9
RR		 291static bool autoclose=1;
292static bool autoeject;
293static bool lockdoor = 1;
1da177e4 294/* will we ever get to use this... sigh. */
90ab5ee9 295static bool check_media_type;
1da177e4 296/* automatically restart mrw format */
90ab5ee9 297static bool mrw_format_restart = 1;
1da177e4
LT		 298module_param(debug, bool, 0);
299module_param(autoclose, bool, 0);
300module_param(autoeject, bool, 0);
301module_param(lockdoor, bool, 0);
302module_param(check_media_type, bool, 0);
303module_param(mrw_format_restart, bool, 0);
304
554988d6 305static DEFINE_MUTEX(cdrom_mutex);
1da177e4
LT		 306
307static const char *mrw_format_status[] = {
308 "not mrw",
309 "bgformat inactive",
310 "bgformat active",
311 "mrw complete",
312};
313
314static const char *mrw_address_space[] = { "DMA", "GAA" };
315
5944b2ce
JP		 316#if (ERRLOGMASK != CD_NOTHING)
317#define cd_dbg(type, fmt, ...) \
e597cd09
JP		 318do { \
319 if ((ERRLOGMASK & type) || debug == 1) \
5944b2ce 320 pr_debug(fmt, ##__VA_ARGS__); \
e597cd09 321} while (0)
1da177e4 322#else
5944b2ce 323#define cd_dbg(type, fmt, ...) \
e597cd09
JP		 324do { \
325 if (0 && (ERRLOGMASK & type) || debug == 1) \
5944b2ce 326 pr_debug(fmt, ##__VA_ARGS__); \
e597cd09 327} while (0)
1da177e4
LT		 328#endif
329
1da177e4
LT		 330/* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
331 a lot of places. This macro makes the code more clear. */
332#define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
333
2e11c207
JA		 334/*
335 * Another popular OS uses 7 seconds as the hard timeout for default
336 * commands, so it is a good choice for us as well.
337 */
338#define CDROM_DEF_TIMEOUT (7 * HZ)
339
1da177e4 340/* Not-exported routines. */
1da177e4 341
1da177e4 342static void cdrom_sysctl_register(void);
17672cf0 343
7fd097d4 344static LIST_HEAD(cdrom_list);
1da177e4 345
853fe1bf
KC		 346int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
347 struct packet_command *cgc)
1da177e4 348{
e7d0748d
KC		 349 if (cgc->sshdr) {
350 cgc->sshdr->sense_key = 0x05;
351 cgc->sshdr->asc = 0x20;
352 cgc->sshdr->ascq = 0x00;
1da177e4
LT		 353 }
354
355 cgc->stat = -EIO;
356 return -EIO;
357}
853fe1bf 358EXPORT_SYMBOL(cdrom_dummy_generic_packet);
1da177e4 359
40569c61 360static int cdrom_flush_cache(struct cdrom_device_info *cdi)
1da177e4
LT		 361{
362 struct packet_command cgc;
1da177e4 363
40569c61
JP		 364 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
365 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
1da177e4 366
40569c61 367 cgc.timeout = 5 * 60 * HZ;
1da177e4 368
40569c61 369 return cdi->ops->generic_packet(cdi, &cgc);
1da177e4
LT		 370}
371
bd6f0bba
JP		 372/* requires CD R/RW */
373static int cdrom_get_disc_info(struct cdrom_device_info *cdi,
374 disc_information *di)
375{
853fe1bf 376 const struct cdrom_device_ops *cdo = cdi->ops;
bd6f0bba
JP		 377 struct packet_command cgc;
378 int ret, buflen;
379
380 /* set up command and get the disc info */
381 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
382 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
383 cgc.cmd[8] = cgc.buflen = 2;
384 cgc.quiet = 1;
385
386 ret = cdo->generic_packet(cdi, &cgc);
387 if (ret)
388 return ret;
389
390 /* not all drives have the same disc_info length, so requeue
391 * packet with the length the drive tells us it can supply
392 */
393 buflen = be16_to_cpu(di->disc_information_length) +
394 sizeof(di->disc_information_length);
395
396 if (buflen > sizeof(disc_information))
397 buflen = sizeof(disc_information);
398
399 cgc.cmd[8] = cgc.buflen = buflen;
400 ret = cdo->generic_packet(cdi, &cgc);
401 if (ret)
402 return ret;
403
404 /* return actual fill size */
405 return buflen;
406}
407
40569c61
JP		 408/* This macro makes sure we don't have to check on cdrom_device_ops
409 * existence in the run-time routines below. Change_capability is a
410 * hack to have the capability flags defined const, while we can still
411 * change it here without gcc complaining at every line.
412 */
8f94004e
JA		 413#define ENSURE(cdo, call, bits) \
414do { \
415 if (cdo->call == NULL) \
416 WARN_ON_ONCE((cdo)->capability & (bits)); \
40569c61
JP		 417} while (0)
418
1da177e4
LT		 419/*
420 * the first prototypes used 0x2c as the page code for the mrw mode page,
421 * subsequently this was changed to 0x03. probe the one used by this drive
422 */
423static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
424{
425 struct packet_command cgc;
fce53847 426 char buffer[16];
1da177e4 427
fce53847 428 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 429
430 cgc.timeout = HZ;
431 cgc.quiet = 1;
432
433 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
434 cdi->mrw_mode_page = MRW_MODE_PC;
fce53847 435 return 0;
1da177e4
LT		 436 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
437 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
fce53847 438 return 0;
1da177e4 439 }
fce53847
FT		 440
441 return 1;
1da177e4
LT		 442}
443
444static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
445{
446 struct packet_command cgc;
447 struct mrw_feature_desc *mfd;
fce53847 448 unsigned char buffer[16];
1da177e4
LT		 449 int ret;
450
451 *write = 0;
452
fce53847 453 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 454
455 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
456 cgc.cmd[3] = CDF_MRW;
fce53847 457 cgc.cmd[8] = sizeof(buffer);
1da177e4
LT		 458 cgc.quiet = 1;
459
460 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
fce53847 461 return ret;
1da177e4
LT		 462
463 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
fce53847
FT		 464 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
465 return 1;
1da177e4
LT		 466 *write = mfd->write;
467
468 if ((ret = cdrom_mrw_probe_pc(cdi))) {
469 *write = 0;
fce53847 470 return ret;
1da177e4 471 }
fce53847
FT		 472
473 return 0;
1da177e4
LT		 474}
475
476static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
477{
478 struct packet_command cgc;
fce53847 479 unsigned char buffer[12];
1da177e4
LT		 480 int ret;
481
e597cd09 482 pr_info("%sstarting format\n", cont ? "Re" : "");
1da177e4
LT		 483
484 /*
485 * FmtData bit set (bit 4), format type is 1
486 */
fce53847 487 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
1da177e4
LT		 488 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
489 cgc.cmd[1] = (1 << 4) | 1;
490
491 cgc.timeout = 5 * 60 * HZ;
492
493 /*
494 * 4 byte format list header, 8 byte format list descriptor
495 */
496 buffer[1] = 1 << 1;
497 buffer[3] = 8;
498
499 /*
500 * nr_blocks field
501 */
502 buffer[4] = 0xff;
503 buffer[5] = 0xff;
504 buffer[6] = 0xff;
505 buffer[7] = 0xff;
506
507 buffer[8] = 0x24 << 2;
508 buffer[11] = cont;
509
510 ret = cdi->ops->generic_packet(cdi, &cgc);
511 if (ret)
e597cd09 512 pr_info("bgformat failed\n");
1da177e4
LT		 513
514 return ret;
515}
516
517static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
518{
519 struct packet_command cgc;
520
521 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
522 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
523
524 /*
525 * Session = 1, Track = 0
526 */
527 cgc.cmd[1] = !!immed;
528 cgc.cmd[2] = 1 << 1;
529
530 cgc.timeout = 5 * 60 * HZ;
531
532 return cdi->ops->generic_packet(cdi, &cgc);
533}
534
1da177e4
LT		 535static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
536{
537 disc_information di;
538 int ret;
539
540 ret = cdrom_get_disc_info(cdi, &di);
541 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
542 return 1;
543
544 ret = 0;
545 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
e597cd09 546 pr_info("issuing MRW background format suspend\n");
1da177e4
LT		 547 ret = cdrom_mrw_bgformat_susp(cdi, 0);
548 }
549
7da21a02 550 if (!ret && cdi->media_written)
1da177e4
LT		 551 ret = cdrom_flush_cache(cdi);
552
553 return ret;
554}
555
556static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
557{
558 struct packet_command cgc;
559 struct mode_page_header *mph;
fce53847 560 char buffer[16];
1da177e4
LT		 561 int ret, offset, size;
562
fce53847 563 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4 564
fce53847
FT		 565 cgc.buffer = buffer;
566 cgc.buflen = sizeof(buffer);
1da177e4 567
40569c61
JP		 568 ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0);
569 if (ret)
fce53847 570 return ret;
1da177e4 571
40569c61 572 mph = (struct mode_page_header *)buffer;
1da177e4
LT		 573 offset = be16_to_cpu(mph->desc_length);
574 size = be16_to_cpu(mph->mode_data_length) + 2;
575
576 buffer[offset + 3] = space;
577 cgc.buflen = size;
578
40569c61
JP		 579 ret = cdrom_mode_select(cdi, &cgc);
580 if (ret)
fce53847 581 return ret;
1da177e4 582
e597cd09
JP		 583 pr_info("%s: mrw address space %s selected\n",
584 cdi->name, mrw_address_space[space]);
fce53847 585 return 0;
1da177e4
LT		 586}
587
40569c61
JP		 588int register_cdrom(struct cdrom_device_info *cdi)
589{
590 static char banner_printed;
853fe1bf 591 const struct cdrom_device_ops *cdo = cdi->ops;
40569c61
JP		 592
593 cd_dbg(CD_OPEN, "entering register_cdrom\n");
594
595 if (cdo->open == NULL || cdo->release == NULL)
596 return -EINVAL;
597 if (!banner_printed) {
598 pr_info("Uniform CD-ROM driver " REVISION "\n");
599 banner_printed = 1;
600 cdrom_sysctl_register();
601 }
602
8f94004e 603 ENSURE(cdo, drive_status, CDC_DRIVE_STATUS);
40569c61 604 if (cdo->check_events == NULL && cdo->media_changed == NULL)
8f94004e
JA		 605 WARN_ON_ONCE(cdo->capability & (CDC_MEDIA_CHANGED | CDC_SELECT_DISC));
606 ENSURE(cdo, tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
607 ENSURE(cdo, lock_door, CDC_LOCK);
608 ENSURE(cdo, select_speed, CDC_SELECT_SPEED);
609 ENSURE(cdo, get_last_session, CDC_MULTI_SESSION);
610 ENSURE(cdo, get_mcn, CDC_MCN);
611 ENSURE(cdo, reset, CDC_RESET);
612 ENSURE(cdo, generic_packet, CDC_GENERIC_PACKET);
40569c61 613 cdi->mc_flags = 0;
40569c61
JP		 614 cdi->options = CDO_USE_FFLAGS;
615
616 if (autoclose == 1 && CDROM_CAN(CDC_CLOSE_TRAY))
617 cdi->options |= (int) CDO_AUTO_CLOSE;
618 if (autoeject == 1 && CDROM_CAN(CDC_OPEN_TRAY))
619 cdi->options |= (int) CDO_AUTO_EJECT;
620 if (lockdoor == 1)
621 cdi->options |= (int) CDO_LOCK;
622 if (check_media_type == 1)
623 cdi->options |= (int) CDO_CHECK_TYPE;
624
625 if (CDROM_CAN(CDC_MRW_W))
626 cdi->exit = cdrom_mrw_exit;
627
628 if (cdi->disk)
629 cdi->cdda_method = CDDA_BPC_FULL;
630 else
631 cdi->cdda_method = CDDA_OLD;
632
853fe1bf 633 WARN_ON(!cdo->generic_packet);
40569c61
JP		 634
635 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
636 mutex_lock(&cdrom_mutex);
637 list_add(&cdi->list, &cdrom_list);
638 mutex_unlock(&cdrom_mutex);
639 return 0;
640}
641#undef ENSURE
642
643void unregister_cdrom(struct cdrom_device_info *cdi)
644{
645 cd_dbg(CD_OPEN, "entering unregister_cdrom\n");
646
647 mutex_lock(&cdrom_mutex);
648 list_del(&cdi->list);
649 mutex_unlock(&cdrom_mutex);
650
651 if (cdi->exit)
652 cdi->exit(cdi);
653
40569c61
JP		 654 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
655}
656
657int cdrom_get_media_event(struct cdrom_device_info *cdi,
658 struct media_event_desc *med)
659{
660 struct packet_command cgc;
661 unsigned char buffer[8];
662 struct event_header *eh = (struct event_header *)buffer;
663
664 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
665 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
666 cgc.cmd[1] = 1; /* IMMED */
667 cgc.cmd[4] = 1 << 4; /* media event */
668 cgc.cmd[8] = sizeof(buffer);
669 cgc.quiet = 1;
670
671 if (cdi->ops->generic_packet(cdi, &cgc))
672 return 1;
673
674 if (be16_to_cpu(eh->data_len) < sizeof(*med))
675 return 1;
676
677 if (eh->nea || eh->notification_class != 0x4)
678 return 1;
679
680 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
681 return 0;
682}
683
1da177e4
LT		 684static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
685 struct rwrt_feature_desc *rfd)
686{
687 struct packet_command cgc;
fce53847 688 char buffer[24];
1da177e4
LT		 689 int ret;
690
fce53847 691 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 692
693 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
694 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
fce53847 695 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
1da177e4
LT		 696 cgc.quiet = 1;
697
698 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
fce53847 699 return ret;
1da177e4
LT		 700
701 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
fce53847 702 return 0;
1da177e4
LT		 703}
704
705static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
706{
707 struct packet_command cgc;
fce53847 708 char buffer[16];
56052d52 709 __be16 *feature_code;
1da177e4
LT		 710 int ret;
711
fce53847 712 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 713
714 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
715 cgc.cmd[3] = CDF_HWDM;
fce53847 716 cgc.cmd[8] = sizeof(buffer);
1da177e4
LT		 717 cgc.quiet = 1;
718
719 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
fce53847 720 return ret;
1da177e4 721
56052d52 722 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
1da177e4 723 if (be16_to_cpu(*feature_code) == CDF_HWDM)
fce53847
FT		 724 return 0;
725
726 return 1;
1da177e4
LT		 727}
728
729
730static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
731{
732 struct rwrt_feature_desc rfd;
733 int ret;
734
735 *write = 0;
736
737 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
738 return ret;
739
740 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
741 *write = 1;
742
743 return 0;
744}
745
746static int cdrom_media_erasable(struct cdrom_device_info *cdi)
747{
748 disc_information di;
749 int ret;
750
751 ret = cdrom_get_disc_info(cdi, &di);
752 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
753 return -1;
754
755 return di.erasable;
756}
757
758/*
759 * FIXME: check RO bit
760 */
761static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
762{
763 int ret = cdrom_media_erasable(cdi);
764
765 /*
766 * allow writable open if media info read worked and media is
767 * erasable, _or_ if it fails since not all drives support it
768 */
769 if (!ret)
770 return 1;
771
772 return 0;
773}
774
775static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
776{
777 disc_information di;
778 int ret;
779
780 /*
781 * always reset to DMA lba space on open
782 */
783 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
e597cd09 784 pr_err("failed setting lba address space\n");
1da177e4
LT		 785 return 1;
786 }
787
788 ret = cdrom_get_disc_info(cdi, &di);
789 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
790 return 1;
791
792 if (!di.erasable)
793 return 1;
794
795 /*
796 * mrw_status
797 * 0 - not MRW formatted
798 * 1 - MRW bgformat started, but not running or complete
799 * 2 - MRW bgformat in progress
800 * 3 - MRW formatting complete
801 */
802 ret = 0;
e597cd09 803 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]);
1da177e4
LT		 804 if (!di.mrw_status)
805 ret = 1;
806 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
807 mrw_format_restart)
808 ret = cdrom_mrw_bgformat(cdi, 1);
809
810 return ret;
811}
812
813static int mo_open_write(struct cdrom_device_info *cdi)
814{
815 struct packet_command cgc;
fce53847 816 char buffer[255];
1da177e4
LT		 817 int ret;
818
fce53847 819 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
1da177e4
LT		 820 cgc.quiet = 1;
821
822 /*
823 * obtain write protect information as per
824 * drivers/scsi/sd.c:sd_read_write_protect_flag
825 */
826
827 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
828 if (ret)
829 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
830 if (ret) {
831 cgc.buflen = 255;
832 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
833 }
834
835 /* drive gave us no info, let the user go ahead */
fce53847
FT		 836 if (ret)
837 return 0;
1da177e4 838
fce53847 839 return buffer[3] & 0x80;
1da177e4
LT		 840}
841
842static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
843{
844 struct rwrt_feature_desc rfd;
845 int ret;
846
847 if ((ret = cdrom_has_defect_mgt(cdi)))
848 return ret;
849
850 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
851 return ret;
852 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
853 ret = !rfd.curr;
854
5944b2ce 855 cd_dbg(CD_OPEN, "can open for random write\n");
1da177e4
LT		 856 return ret;
857}
858
859static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
860{
861 struct packet_command cgc;
fce53847 862 char buffer[32];
1da177e4
LT		 863 int ret, mmc3_profile;
864
fce53847 865 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 866
867 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
868 cgc.cmd[1] = 0;
869 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
fce53847 870 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
1da177e4
LT		 871 cgc.quiet = 1;
872
873 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
874 mmc3_profile = 0xffff;
875 else
876 mmc3_profile = (buffer[6] << 8) | buffer[7];
877
878 cdi->mmc3_profile = mmc3_profile;
879}
880
881static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
882{
883 switch (cdi->mmc3_profile) {
884 case 0x12: /* DVD-RAM */
885 case 0x1A: /* DVD+RW */
f7e7868b 886 case 0x43: /* BD-RE */
1da177e4
LT		 887 return 0;
888 default:
889 return 1;
890 }
891}
892
893/*
894 * returns 0 for ok to open write, non-0 to disallow
895 */
896static int cdrom_open_write(struct cdrom_device_info *cdi)
897{
898 int mrw, mrw_write, ram_write;
899 int ret = 1;
900
901 mrw = 0;
902 if (!cdrom_is_mrw(cdi, &mrw_write))
903 mrw = 1;
904
905 if (CDROM_CAN(CDC_MO_DRIVE))
906 ram_write = 1;
907 else
908 (void) cdrom_is_random_writable(cdi, &ram_write);
909
910 if (mrw)
911 cdi->mask &= ~CDC_MRW;
912 else
913 cdi->mask |= CDC_MRW;
914
915 if (mrw_write)
916 cdi->mask &= ~CDC_MRW_W;
917 else
918 cdi->mask |= CDC_MRW_W;
919
920 if (ram_write)
921 cdi->mask &= ~CDC_RAM;
922 else
923 cdi->mask |= CDC_RAM;
924
925 if (CDROM_CAN(CDC_MRW_W))
926 ret = cdrom_mrw_open_write(cdi);
927 else if (CDROM_CAN(CDC_DVD_RAM))
928 ret = cdrom_dvdram_open_write(cdi);
929 else if (CDROM_CAN(CDC_RAM) &&
930 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
931 ret = cdrom_ram_open_write(cdi);
932 else if (CDROM_CAN(CDC_MO_DRIVE))
933 ret = mo_open_write(cdi);
934 else if (!cdrom_is_dvd_rw(cdi))
935 ret = 0;
936
937 return ret;
938}
939
940static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
941{
942 struct packet_command cgc;
943
944 if (cdi->mmc3_profile != 0x1a) {
5944b2ce 945 cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
1da177e4
LT		 946 return;
947 }
948
949 if (!cdi->media_written) {
5944b2ce 950 cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
1da177e4
LT		 951 return;
952 }
953
e597cd09 954 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name);
1da177e4
LT		 955
956 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
957 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
958 cgc.timeout = 30*HZ;
959 cdi->ops->generic_packet(cdi, &cgc);
960
961 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
962 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
963 cgc.timeout = 3000*HZ;
964 cgc.quiet = 1;
965 cdi->ops->generic_packet(cdi, &cgc);
966
967 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
968 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
969 cgc.cmd[2] = 2; /* Close session */
970 cgc.quiet = 1;
971 cgc.timeout = 3000*HZ;
972 cdi->ops->generic_packet(cdi, &cgc);
973
974 cdi->media_written = 0;
975}
976
977static int cdrom_close_write(struct cdrom_device_info *cdi)
978{
979#if 0
980 return cdrom_flush_cache(cdi);
981#else
982 return 0;
983#endif
984}
985
a803393b
JP		 986/* badly broken, I know. Is due for a fixup anytime. */
987static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks)
988{
989 struct cdrom_tochdr header;
990 struct cdrom_tocentry entry;
991 int ret, i;
992 tracks->data = 0;
993 tracks->audio = 0;
994 tracks->cdi = 0;
995 tracks->xa = 0;
996 tracks->error = 0;
997 cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
998 /* Grab the TOC header so we can see how many tracks there are */
999 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
1000 if (ret) {
1001 if (ret == -ENOMEDIUM)
1002 tracks->error = CDS_NO_DISC;
1003 else
1004 tracks->error = CDS_NO_INFO;
1005 return;
1006 }
1007 /* check what type of tracks are on this disc */
1008 entry.cdte_format = CDROM_MSF;
1009 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1010 entry.cdte_track = i;
1011 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1012 tracks->error = CDS_NO_INFO;
1013 return;
1014 }
1015 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1016 if (entry.cdte_format == 0x10)
1017 tracks->cdi++;
1018 else if (entry.cdte_format == 0x20)
1019 tracks->xa++;
1020 else
1021 tracks->data++;
1022 } else {
1023 tracks->audio++;
1024 }
1025 cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1026 i, entry.cdte_format, entry.cdte_ctrl);
1027 }
1028 cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1029 header.cdth_trk1, tracks->audio, tracks->data,
1030 tracks->cdi, tracks->xa);
1031}
1032
1da177e4 1033static
82b91540 1034int open_for_data(struct cdrom_device_info *cdi)
1da177e4
LT		 1035{
1036 int ret;
853fe1bf 1037 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4 1038 tracktype tracks;
5944b2ce 1039 cd_dbg(CD_OPEN, "entering open_for_data\n");
1da177e4
LT		 1040 /* Check if the driver can report drive status. If it can, we
1041 can do clever things. If it can't, well, we at least tried! */
1042 if (cdo->drive_status != NULL) {
1043 ret = cdo->drive_status(cdi, CDSL_CURRENT);
5944b2ce 1044 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1da177e4 1045 if (ret == CDS_TRAY_OPEN) {
5944b2ce 1046 cd_dbg(CD_OPEN, "the tray is open...\n");
1da177e4
LT		 1047 /* can/may i close it? */
1048 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1049 cdi->options & CDO_AUTO_CLOSE) {
5944b2ce 1050 cd_dbg(CD_OPEN, "trying to close the tray\n");
1da177e4
LT		 1051 ret=cdo->tray_move(cdi,0);
1052 if (ret) {
5944b2ce 1053 cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1da177e4
LT		 1054 /* Ignore the error from the low
1055 level driver. We don't care why it
1056 couldn't close the tray. We only care
1057 that there is no disc in the drive,
1058 since that is the _REAL_ problem here.*/
1059 ret=-ENOMEDIUM;
1060 goto clean_up_and_return;
1061 }
1062 } else {
5944b2ce 1063 cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n");
1da177e4
LT		 1064 ret=-ENOMEDIUM;
1065 goto clean_up_and_return;
1066 }
1067 /* Ok, the door should be closed now.. Check again */
1068 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1069 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
5944b2ce
JP		 1070 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1071 cd_dbg(CD_OPEN, "tray might not contain a medium\n");
1da177e4
LT		 1072 ret=-ENOMEDIUM;
1073 goto clean_up_and_return;
1074 }
5944b2ce 1075 cd_dbg(CD_OPEN, "the tray is now closed\n");
1da177e4
LT		 1076 }
1077 /* the door should be closed now, check for the disc */
1078 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1079 if (ret!=CDS_DISC_OK) {
1080 ret = -ENOMEDIUM;
1081 goto clean_up_and_return;
1082 }
1083 }
1084 cdrom_count_tracks(cdi, &tracks);
1085 if (tracks.error == CDS_NO_DISC) {
5944b2ce 1086 cd_dbg(CD_OPEN, "bummer. no disc.\n");
1da177e4
LT		 1087 ret=-ENOMEDIUM;
1088 goto clean_up_and_return;
1089 }
1090 /* CD-Players which don't use O_NONBLOCK, workman
1091 * for example, need bit CDO_CHECK_TYPE cleared! */
1092 if (tracks.data==0) {
1093 if (cdi->options & CDO_CHECK_TYPE) {
1094 /* give people a warning shot, now that CDO_CHECK_TYPE
1095 is the default case! */
5944b2ce
JP		 1096 cd_dbg(CD_OPEN, "bummer. wrong media type.\n");
1097 cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1098 (unsigned int)task_pid_nr(current));
1da177e4
LT		 1099 ret=-EMEDIUMTYPE;
1100 goto clean_up_and_return;
1101 }
1102 else {
5944b2ce 1103 cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n");
1da177e4
LT		 1104 }
1105 }
1106
5944b2ce 1107 cd_dbg(CD_OPEN, "all seems well, opening the devicen");
1da177e4
LT		 1108
1109 /* all seems well, we can open the device */
1110 ret = cdo->open(cdi, 0); /* open for data */
5944b2ce 1111 cd_dbg(CD_OPEN, "opening the device gave me %d\n", ret);
1da177e4
LT		 1112 /* After all this careful checking, we shouldn't have problems
1113 opening the device, but we don't want the device locked if
1114 this somehow fails... */
1115 if (ret) {
5944b2ce 1116 cd_dbg(CD_OPEN, "open device failed\n");
1da177e4
LT		 1117 goto clean_up_and_return;
1118 }
1119 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1120 cdo->lock_door(cdi, 1);
5944b2ce 1121 cd_dbg(CD_OPEN, "door locked\n");
1da177e4 1122 }
5944b2ce 1123 cd_dbg(CD_OPEN, "device opened successfully\n");
1da177e4
LT		 1124 return ret;
1125
1126 /* Something failed. Try to unlock the drive, because some drivers
1127 (notably ide-cd) lock the drive after every command. This produced
1128 a nasty bug where after mount failed, the drive would remain locked!
1129 This ensures that the drive gets unlocked after a mount fails. This
1130 is a goto to avoid bloating the driver with redundant code. */
1131clean_up_and_return:
5944b2ce 1132 cd_dbg(CD_OPEN, "open failed\n");
1da177e4
LT		 1133 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1134 cdo->lock_door(cdi, 0);
5944b2ce 1135 cd_dbg(CD_OPEN, "door unlocked\n");
1da177e4
LT		 1136 }
1137 return ret;
1138}
1139
82b91540
JP		 1140/* We use the open-option O_NONBLOCK to indicate that the
1141 * purpose of opening is only for subsequent ioctl() calls; no device
1142 * integrity checks are performed.
1143 *
1144 * We hope that all cd-player programs will adopt this convention. It
1145 * is in their own interest: device control becomes a lot easier
1146 * this way.
1147 */
1148int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
1149 fmode_t mode)
1150{
1151 int ret;
1152
1153 cd_dbg(CD_OPEN, "entering cdrom_open\n");
1154
82b91540
JP		 1155 /* if this was a O_NONBLOCK open and we should honor the flags,
1156 * do a quick open without drive/disc integrity checks. */
1157 cdi->use_count++;
1158 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
1159 ret = cdi->ops->open(cdi, 1);
1160 } else {
1161 ret = open_for_data(cdi);
1162 if (ret)
1163 goto err;
1164 cdrom_mmc3_profile(cdi);
1165 if (mode & FMODE_WRITE) {
1166 ret = -EROFS;
1167 if (cdrom_open_write(cdi))
1168 goto err_release;
1169 if (!CDROM_CAN(CDC_RAM))
1170 goto err_release;
1171 ret = 0;
1172 cdi->media_written = 0;
1173 }
1174 }
1175
1176 if (ret)
1177 goto err;
1178
1179 cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1180 cdi->name, cdi->use_count);
1181 return 0;
1182err_release:
1183 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1184 cdi->ops->lock_door(cdi, 0);
1185 cd_dbg(CD_OPEN, "door unlocked\n");
1186 }
1187 cdi->ops->release(cdi);
1188err:
1189 cdi->use_count--;
1190 return ret;
1191}
1192
1da177e4
LT		 1193/* This code is similar to that in open_for_data. The routine is called
1194 whenever an audio play operation is requested.
1195*/
853fe1bf
KC		 1196static int check_for_audio_disc(struct cdrom_device_info *cdi,
1197 const struct cdrom_device_ops *cdo)
1da177e4
LT		 1198{
1199 int ret;
1200 tracktype tracks;
5944b2ce 1201 cd_dbg(CD_OPEN, "entering check_for_audio_disc\n");
1da177e4
LT		 1202 if (!(cdi->options & CDO_CHECK_TYPE))
1203 return 0;
1204 if (cdo->drive_status != NULL) {
1205 ret = cdo->drive_status(cdi, CDSL_CURRENT);
5944b2ce 1206 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1da177e4 1207 if (ret == CDS_TRAY_OPEN) {
5944b2ce 1208 cd_dbg(CD_OPEN, "the tray is open...\n");
1da177e4
LT		 1209 /* can/may i close it? */
1210 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1211 cdi->options & CDO_AUTO_CLOSE) {
5944b2ce 1212 cd_dbg(CD_OPEN, "trying to close the tray\n");
1da177e4
LT		 1213 ret=cdo->tray_move(cdi,0);
1214 if (ret) {
5944b2ce 1215 cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n");
1da177e4
LT		 1216 /* Ignore the error from the low
1217 level driver. We don't care why it
1218 couldn't close the tray. We only care
1219 that there is no disc in the drive,
1220 since that is the _REAL_ problem here.*/
1221 return -ENOMEDIUM;
1222 }
1223 } else {
5944b2ce 1224 cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n");
1da177e4
LT		 1225 return -ENOMEDIUM;
1226 }
1227 /* Ok, the door should be closed now.. Check again */
1228 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1229 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
5944b2ce 1230 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1da177e4
LT		 1231 return -ENOMEDIUM;
1232 }
1233 if (ret!=CDS_DISC_OK) {
5944b2ce 1234 cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n");
1da177e4
LT		 1235 return -EIO;
1236 }
5944b2ce 1237 cd_dbg(CD_OPEN, "the tray is now closed\n");
1da177e4
LT		 1238 }
1239 }
1240 cdrom_count_tracks(cdi, &tracks);
1241 if (tracks.error)
1242 return(tracks.error);
1243
1244 if (tracks.audio==0)
1245 return -EMEDIUMTYPE;
1246
1247 return 0;
1248}
1249
bbc1cc97 1250void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
1da177e4 1251{
853fe1bf 1252 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4
LT		 1253 int opened_for_data;
1254
5944b2ce 1255 cd_dbg(CD_CLOSE, "entering cdrom_release\n");
1da177e4
LT		 1256
1257 if (cdi->use_count > 0)
1258 cdi->use_count--;
35841f70
BP		 1259
1260 if (cdi->use_count == 0) {
5944b2ce
JP		 1261 cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n",
1262 cdi->name);
1da177e4 1263 cdrom_dvd_rw_close_write(cdi);
35841f70 1264
cdccaa94 1265 if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) {
5944b2ce 1266 cd_dbg(CD_CLOSE, "Unlocking door!\n");
35841f70
BP		 1267 cdo->lock_door(cdi, 0);
1268 }
1da177e4 1269 }
35841f70 1270
1da177e4 1271 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
bbc1cc97 1272 !(mode & FMODE_NDELAY);
1da177e4
LT		 1273
1274 /*
1275 * flush cache on last write release
1276 */
1277 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1278 cdrom_close_write(cdi);
1279
1280 cdo->release(cdi);
1281 if (cdi->use_count == 0) { /* last process that closes dev*/
1282 if (opened_for_data &&
1283 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1284 cdo->tray_move(cdi, 1);
1285 }
1da177e4
LT		 1286}
1287
1288static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1289 struct cdrom_changer_info *buf)
1290{
1291 struct packet_command cgc;
853fe1bf 1292 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4
LT		 1293 int length;
1294
1295 /*
1296 * Sanyo changer isn't spec compliant (doesn't use regular change
1297 * LOAD_UNLOAD command, and it doesn't implement the mech status
1298 * command below
1299 */
1300 if (cdi->sanyo_slot) {
1301 buf->hdr.nslots = 3;
1302 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1303 for (length = 0; length < 3; length++) {
1304 buf->slots[length].disc_present = 1;
1305 buf->slots[length].change = 0;
1306 }
1307 return 0;
1308 }
1309
1310 length = sizeof(struct cdrom_mechstat_header) +
1311 cdi->capacity * sizeof(struct cdrom_slot);
1312
1313 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1314 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1315 cgc.cmd[8] = (length >> 8) & 0xff;
1316 cgc.cmd[9] = length & 0xff;
1317 return cdo->generic_packet(cdi, &cgc);
1318}
1319
1320static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1321{
1322 struct cdrom_changer_info *info;
1323 int ret;
1324
5944b2ce 1325 cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n");
1da177e4
LT		 1326 if (cdi->sanyo_slot)
1327 return CDS_NO_INFO;
1328
1329 info = kmalloc(sizeof(*info), GFP_KERNEL);
1330 if (!info)
1331 return -ENOMEM;
1332
1333 if ((ret = cdrom_read_mech_status(cdi, info)))
1334 goto out_free;
1335
1336 if (info->slots[slot].disc_present)
1337 ret = CDS_DISC_OK;
1338 else
1339 ret = CDS_NO_DISC;
1340
1341out_free:
1342 kfree(info);
1343 return ret;
1344}
1345
1346/* Return the number of slots for an ATAPI/SCSI cdrom,
1347 * return 1 if not a changer.
1348 */
1349int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1350{
1351 int status;
1352 int nslots = 1;
1353 struct cdrom_changer_info *info;
1354
5944b2ce 1355 cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1da177e4
LT		 1356 /* cdrom_read_mech_status requires a valid value for capacity: */
1357 cdi->capacity = 0;
1358
1359 info = kmalloc(sizeof(*info), GFP_KERNEL);
1360 if (!info)
1361 return -ENOMEM;
1362
1363 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1364 nslots = info->hdr.nslots;
1365
1366 kfree(info);
1367 return nslots;
1368}
1369
1370
1371/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1372static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1373{
1374 struct packet_command cgc;
1375
5944b2ce 1376 cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n");
1da177e4
LT		 1377 if (cdi->sanyo_slot && slot < 0)
1378 return 0;
1379
1380 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1381 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1382 cgc.cmd[4] = 2 + (slot >= 0);
1383 cgc.cmd[8] = slot;
1384 cgc.timeout = 60 * HZ;
1385
1386 /* The Sanyo 3 CD changer uses byte 7 of the
1387 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1388 using the GPCMD_LOAD_UNLOAD opcode. */
1389 if (cdi->sanyo_slot && -1 < slot) {
1390 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1391 cgc.cmd[7] = slot;
1392 cgc.cmd[4] = cgc.cmd[8] = 0;
1393 cdi->sanyo_slot = slot ? slot : 3;
1394 }
1395
1396 return cdi->ops->generic_packet(cdi, &cgc);
1397}
1398
1399static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1400{
1401 struct cdrom_changer_info *info;
1402 int curslot;
1403 int ret;
1404
5944b2ce 1405 cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n");
1da177e4
LT		 1406 if (!CDROM_CAN(CDC_SELECT_DISC))
1407 return -EDRIVE_CANT_DO_THIS;
1408
2d921729
TH		 1409 if (cdi->ops->check_events)
1410 cdi->ops->check_events(cdi, 0, slot);
1411 else
1412 cdi->ops->media_changed(cdi, slot);
1da177e4
LT		 1413
1414 if (slot == CDSL_NONE) {
1415 /* set media changed bits, on both queues */
1416 cdi->mc_flags = 0x3;
1417 return cdrom_load_unload(cdi, -1);
1418 }
1419
1420 info = kmalloc(sizeof(*info), GFP_KERNEL);
1421 if (!info)
1422 return -ENOMEM;
1423
1424 if ((ret = cdrom_read_mech_status(cdi, info))) {
1425 kfree(info);
1426 return ret;
1427 }
1428
1429 curslot = info->hdr.curslot;
1430 kfree(info);
1431
cdccaa94 1432 if (cdi->use_count > 1 || cdi->keeplocked) {
1da177e4
LT		 1433 if (slot == CDSL_CURRENT) {
1434 return curslot;
1435 } else {
1436 return -EBUSY;
1437 }
1438 }
1439
1440 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1441 which is useful if it had been previously unloaded.
1442 Whether it can or not, it returns the current slot.
1443 Similarly, if slot happens to be the current one, we still
1444 try and load it. */
1445 if (slot == CDSL_CURRENT)
1446 slot = curslot;
1447
1448 /* set media changed bits on both queues */
1449 cdi->mc_flags = 0x3;
1450 if ((ret = cdrom_load_unload(cdi, slot)))
1451 return ret;
1452
1453 return slot;
1454}
1455
2d921729
TH		 1456/*
1457 * As cdrom implements an extra ioctl consumer for media changed
1458 * event, it needs to buffer ->check_events() output, such that event
1459 * is not lost for both the usual VFS and ioctl paths.
1460 * cdi->{vfs|ioctl}_events are used to buffer pending events for each
1461 * path.
1462 *
1463 * XXX: Locking is non-existent. cdi->ops->check_events() can be
1464 * called in parallel and buffering fields are accessed without any
1465 * exclusion. The original media_changed code had the same problem.
1466 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl
1467 * and remove this cruft altogether. It doesn't have much usefulness
1468 * at this point.
1469 */
1470static void cdrom_update_events(struct cdrom_device_info *cdi,
1471 unsigned int clearing)
1472{
1473 unsigned int events;
1474
1475 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT);
1476 cdi->vfs_events |= events;
1477 cdi->ioctl_events |= events;
1478}
1479
1480unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
1481 unsigned int clearing)
1482{
1483 unsigned int events;
1484
1485 cdrom_update_events(cdi, clearing);
1486 events = cdi->vfs_events;
1487 cdi->vfs_events = 0;
1488 return events;
1489}
30a7caab 1490EXPORT_SYMBOL(cdrom_check_events);
2d921729 1491
1da177e4
LT		 1492/* We want to make media_changed accessible to the user through an
1493 * ioctl. The main problem now is that we must double-buffer the
1494 * low-level implementation, to assure that the VFS and the user both
1495 * see a medium change once.
1496 */
1497
1498static
1499int media_changed(struct cdrom_device_info *cdi, int queue)
1500{
1501 unsigned int mask = (1 << (queue & 1));
1502 int ret = !!(cdi->mc_flags & mask);
2d921729 1503 bool changed;
1da177e4
LT		 1504
1505 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2d921729
TH		 1506 return ret;
1507
1da177e4 1508 /* changed since last call? */
2d921729
TH		 1509 if (cdi->ops->check_events) {
1510 BUG_ON(!queue); /* shouldn't be called from VFS path */
1511 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
1512 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
1513 cdi->ioctl_events = 0;
1514 } else
1515 changed = cdi->ops->media_changed(cdi, CDSL_CURRENT);
1516
1517 if (changed) {
1da177e4
LT		 1518 cdi->mc_flags = 0x3; /* set bit on both queues */
1519 ret |= 1;
1520 cdi->media_written = 0;
1521 }
2d921729 1522
1da177e4
LT		 1523 cdi->mc_flags &= ~mask; /* clear bit */
1524 return ret;
1525}
1526
1527int cdrom_media_changed(struct cdrom_device_info *cdi)
1528{
1529 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1530 * Returning "0" is always safe (media hasn't been changed). Do that
1531 * if the low-level cdrom driver dosn't support media changed. */
1532 if (cdi == NULL || cdi->ops->media_changed == NULL)
1533 return 0;
1534 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1535 return 0;
1536 return media_changed(cdi, 0);
1537}
1538
1da177e4
LT		 1539/* Requests to the low-level drivers will /always/ be done in the
1540 following format convention:
1541
1542 CDROM_LBA: all data-related requests.
1543 CDROM_MSF: all audio-related requests.
1544
1545 However, a low-level implementation is allowed to refuse this
1546 request, and return information in its own favorite format.
1547
1548 It doesn't make sense /at all/ to ask for a play_audio in LBA
1549 format, or ask for multi-session info in MSF format. However, for
1550 backward compatibility these format requests will be satisfied, but
1551 the requests to the low-level drivers will be sanitized in the more
1552 meaningful format indicated above.
1553 */
1554
1555static
1556void sanitize_format(union cdrom_addr *addr,
1557 u_char * curr, u_char requested)
1558{
1559 if (*curr == requested)
1560 return; /* nothing to be done! */
1561 if (requested == CDROM_LBA) {
1562 addr->lba = (int) addr->msf.frame +
1563 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1564 } else { /* CDROM_MSF */
1565 int lba = addr->lba;
1566 addr->msf.frame = lba % 75;
1567 lba /= 75;
1568 lba += 2;
1569 addr->msf.second = lba % 60;
1570 addr->msf.minute = lba / 60;
1571 }
1572 *curr = requested;
1573}
1574
1575void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1576 int type)
1577{
1578 memset(cgc, 0, sizeof(struct packet_command));
1579 if (buf)
1580 memset(buf, 0, len);
1581 cgc->buffer = (char *) buf;
1582 cgc->buflen = len;
1583 cgc->data_direction = type;
2e11c207 1584 cgc->timeout = CDROM_DEF_TIMEOUT;
1da177e4
LT		 1585}
1586
1587/* DVD handling */
1588
1589#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1590#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1591
1592static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1593{
1594 cgc->cmd[0] = GPCMD_REPORT_KEY;
1595 cgc->cmd[10] = type | (agid << 6);
1596 switch (type) {
1597 case 0: case 8: case 5: {
1598 cgc->buflen = 8;
1599 break;
1600 }
1601 case 1: {
1602 cgc->buflen = 16;
1603 break;
1604 }
1605 case 2: case 4: {
1606 cgc->buflen = 12;
1607 break;
1608 }
1609 }
1610 cgc->cmd[9] = cgc->buflen;
1611 cgc->data_direction = CGC_DATA_READ;
1612}
1613
1614static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1615{
1616 cgc->cmd[0] = GPCMD_SEND_KEY;
1617 cgc->cmd[10] = type | (agid << 6);
1618 switch (type) {
1619 case 1: {
1620 cgc->buflen = 16;
1621 break;
1622 }
1623 case 3: {
1624 cgc->buflen = 12;
1625 break;
1626 }
1627 case 6: {
1628 cgc->buflen = 8;
1629 break;
1630 }
1631 }
1632 cgc->cmd[9] = cgc->buflen;
1633 cgc->data_direction = CGC_DATA_WRITE;
1634}
1635
1636static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1637{
1638 int ret;
fce53847 1639 u_char buf[20];
1da177e4 1640 struct packet_command cgc;
853fe1bf 1641 const struct cdrom_device_ops *cdo = cdi->ops;
fce53847 1642 rpc_state_t rpc_state;
1da177e4 1643
fce53847 1644 memset(buf, 0, sizeof(buf));
1da177e4
LT		 1645 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1646
1647 switch (ai->type) {
1648 /* LU data send */
1649 case DVD_LU_SEND_AGID:
5944b2ce 1650 cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1da177e4
LT		 1651 cgc.quiet = 1;
1652 setup_report_key(&cgc, ai->lsa.agid, 0);
1653
1654 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1655 return ret;
1da177e4
LT		 1656
1657 ai->lsa.agid = buf[7] >> 6;
1658 /* Returning data, let host change state */
1659 break;
1660
1661 case DVD_LU_SEND_KEY1:
5944b2ce 1662 cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1da177e4
LT		 1663 setup_report_key(&cgc, ai->lsk.agid, 2);
1664
1665 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1666 return ret;
1da177e4
LT		 1667
1668 copy_key(ai->lsk.key, &buf[4]);
1669 /* Returning data, let host change state */
1670 break;
1671
1672 case DVD_LU_SEND_CHALLENGE:
5944b2ce 1673 cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1da177e4
LT		 1674 setup_report_key(&cgc, ai->lsc.agid, 1);
1675
1676 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1677 return ret;
1da177e4
LT		 1678
1679 copy_chal(ai->lsc.chal, &buf[4]);
1680 /* Returning data, let host change state */
1681 break;
1682
1683 /* Post-auth key */
1684 case DVD_LU_SEND_TITLE_KEY:
5944b2ce 1685 cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1da177e4
LT		 1686 cgc.quiet = 1;
1687 setup_report_key(&cgc, ai->lstk.agid, 4);
1688 cgc.cmd[5] = ai->lstk.lba;
1689 cgc.cmd[4] = ai->lstk.lba >> 8;
1690 cgc.cmd[3] = ai->lstk.lba >> 16;
1691 cgc.cmd[2] = ai->lstk.lba >> 24;
1692
1693 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1694 return ret;
1da177e4
LT		 1695
1696 ai->lstk.cpm = (buf[4] >> 7) & 1;
1697 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1698 ai->lstk.cgms = (buf[4] >> 4) & 3;
1699 copy_key(ai->lstk.title_key, &buf[5]);
1700 /* Returning data, let host change state */
1701 break;
1702
1703 case DVD_LU_SEND_ASF:
5944b2ce 1704 cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1da177e4
LT		 1705 setup_report_key(&cgc, ai->lsasf.agid, 5);
1706
1707 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1708 return ret;
1da177e4
LT		 1709
1710 ai->lsasf.asf = buf[7] & 1;
1711 break;
1712
1713 /* LU data receive (LU changes state) */
1714 case DVD_HOST_SEND_CHALLENGE:
5944b2ce 1715 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1da177e4
LT		 1716 setup_send_key(&cgc, ai->hsc.agid, 1);
1717 buf[1] = 0xe;
1718 copy_chal(&buf[4], ai->hsc.chal);
1719
1720 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1721 return ret;
1da177e4
LT		 1722
1723 ai->type = DVD_LU_SEND_KEY1;
1724 break;
1725
1726 case DVD_HOST_SEND_KEY2:
5944b2ce 1727 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1da177e4
LT		 1728 setup_send_key(&cgc, ai->hsk.agid, 3);
1729 buf[1] = 0xa;
1730 copy_key(&buf[4], ai->hsk.key);
1731
1732 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1733 ai->type = DVD_AUTH_FAILURE;
fce53847 1734 return ret;
1da177e4
LT		 1735 }
1736 ai->type = DVD_AUTH_ESTABLISHED;
1737 break;
1738
1739 /* Misc */
1740 case DVD_INVALIDATE_AGID:
1741 cgc.quiet = 1;
5944b2ce 1742 cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1da177e4
LT		 1743 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1744 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1745 return ret;
1da177e4
LT		 1746 break;
1747
1748 /* Get region settings */
1749 case DVD_LU_SEND_RPC_STATE:
5944b2ce 1750 cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1da177e4 1751 setup_report_key(&cgc, 0, 8);
fce53847
FT		 1752 memset(&rpc_state, 0, sizeof(rpc_state_t));
1753 cgc.buffer = (char *) &rpc_state;
1da177e4
LT		 1754
1755 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1756 return ret;
1da177e4 1757
fce53847
FT		 1758 ai->lrpcs.type = rpc_state.type_code;
1759 ai->lrpcs.vra = rpc_state.vra;
1760 ai->lrpcs.ucca = rpc_state.ucca;
1761 ai->lrpcs.region_mask = rpc_state.region_mask;
1762 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1da177e4
LT		 1763 break;
1764
1765 /* Set region settings */
1766 case DVD_HOST_SEND_RPC_STATE:
5944b2ce 1767 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1da177e4
LT		 1768 setup_send_key(&cgc, 0, 6);
1769 buf[1] = 6;
1770 buf[4] = ai->hrpcs.pdrc;
1771
1772 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1773 return ret;
1da177e4
LT		 1774 break;
1775
1776 default:
5944b2ce 1777 cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
fce53847 1778 return -ENOTTY;
1da177e4 1779 }
fce53847
FT		 1780
1781 return 0;
1da177e4
LT		 1782}
1783
d194139c
MS		 1784static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1785 struct packet_command *cgc)
1da177e4 1786{
fce53847 1787 unsigned char buf[21], *base;
1da177e4 1788 struct dvd_layer *layer;
853fe1bf 1789 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4
LT		 1790 int ret, layer_num = s->physical.layer_num;
1791
1792 if (layer_num >= DVD_LAYERS)
1793 return -EINVAL;
1794
d194139c
MS		 1795 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1796 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1797 cgc->cmd[6] = layer_num;
1798 cgc->cmd[7] = s->type;
1799 cgc->cmd[9] = cgc->buflen & 0xff;
1da177e4
LT		 1800
1801 /*
1802 * refrain from reporting errors on non-existing layers (mainly)
1803 */
d194139c 1804 cgc->quiet = 1;
1da177e4 1805
d194139c
MS		 1806 ret = cdo->generic_packet(cdi, cgc);
1807 if (ret)
fce53847 1808 return ret;
1da177e4
LT		 1809
1810 base = &buf[4];
1811 layer = &s->physical.layer[layer_num];
1812
1813 /*
1814 * place the data... really ugly, but at least we won't have to
1815 * worry about endianess in userspace.
1816 */
1817 memset(layer, 0, sizeof(*layer));
1818 layer->book_version = base[0] & 0xf;
1819 layer->book_type = base[0] >> 4;
1820 layer->min_rate = base[1] & 0xf;
1821 layer->disc_size = base[1] >> 4;
1822 layer->layer_type = base[2] & 0xf;
1823 layer->track_path = (base[2] >> 4) & 1;
1824 layer->nlayers = (base[2] >> 5) & 3;
1825 layer->track_density = base[3] & 0xf;
1826 layer->linear_density = base[3] >> 4;
1827 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1828 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1829 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1830 layer->bca = base[16] >> 7;
1831
fce53847 1832 return 0;
1da177e4
LT		 1833}
1834
d194139c
MS		 1835static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1836 struct packet_command *cgc)
1da177e4
LT		 1837{
1838 int ret;
fce53847 1839 u_char buf[8];
853fe1bf 1840 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4 1841
d194139c
MS		 1842 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1843 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1844 cgc->cmd[6] = s->copyright.layer_num;
1845 cgc->cmd[7] = s->type;
1846 cgc->cmd[8] = cgc->buflen >> 8;
1847 cgc->cmd[9] = cgc->buflen & 0xff;
1da177e4 1848
d194139c
MS		 1849 ret = cdo->generic_packet(cdi, cgc);
1850 if (ret)
fce53847 1851 return ret;
1da177e4
LT		 1852
1853 s->copyright.cpst = buf[4];
1854 s->copyright.rmi = buf[5];
1855
fce53847 1856 return 0;
1da177e4
LT		 1857}
1858
d194139c
MS		 1859static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1860 struct packet_command *cgc)
1da177e4
LT		 1861{
1862 int ret, size;
1863 u_char *buf;
853fe1bf 1864 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4
LT		 1865
1866 size = sizeof(s->disckey.value) + 4;
1867
d194139c
MS		 1868 buf = kmalloc(size, GFP_KERNEL);
1869 if (!buf)
1da177e4
LT		 1870 return -ENOMEM;
1871
d194139c
MS		 1872 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1873 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1874 cgc->cmd[7] = s->type;
1875 cgc->cmd[8] = size >> 8;
1876 cgc->cmd[9] = size & 0xff;
1877 cgc->cmd[10] = s->disckey.agid << 6;
1da177e4 1878
d194139c
MS		 1879 ret = cdo->generic_packet(cdi, cgc);
1880 if (!ret)
1da177e4
LT		 1881 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1882
1883 kfree(buf);
1884 return ret;
1885}
1886
d194139c
MS		 1887static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1888 struct packet_command *cgc)
1da177e4 1889{
d194139c
MS		 1890 int ret, size = 4 + 188;
1891 u_char *buf;
853fe1bf 1892 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4 1893
d194139c
MS		 1894 buf = kmalloc(size, GFP_KERNEL);
1895 if (!buf)
1896 return -ENOMEM;
1da177e4 1897
d194139c
MS		 1898 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1899 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1900 cgc->cmd[7] = s->type;
1901 cgc->cmd[9] = cgc->buflen & 0xff;
1902
1903 ret = cdo->generic_packet(cdi, cgc);
1904 if (ret)
1905 goto out;
1da177e4
LT		 1906
1907 s->bca.len = buf[0] << 8 | buf[1];
1908 if (s->bca.len < 12 || s->bca.len > 188) {
5944b2ce
JP		 1909 cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n",
1910 s->bca.len);
d194139c
MS		 1911 ret = -EIO;
1912 goto out;
1da177e4
LT		 1913 }
1914 memcpy(s->bca.value, &buf[4], s->bca.len);
d194139c
MS		 1915 ret = 0;
1916out:
1917 kfree(buf);
1918 return ret;
1da177e4
LT		 1919}
1920
d194139c
MS		 1921static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1922 struct packet_command *cgc)
1da177e4
LT		 1923{
1924 int ret = 0, size;
1925 u_char *buf;
853fe1bf 1926 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4
LT		 1927
1928 size = sizeof(s->manufact.value) + 4;
1929
d194139c
MS		 1930 buf = kmalloc(size, GFP_KERNEL);
1931 if (!buf)
1da177e4
LT		 1932 return -ENOMEM;
1933
d194139c
MS		 1934 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1935 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1936 cgc->cmd[7] = s->type;
1937 cgc->cmd[8] = size >> 8;
1938 cgc->cmd[9] = size & 0xff;
1da177e4 1939
d194139c
MS		 1940 ret = cdo->generic_packet(cdi, cgc);
1941 if (ret)
1942 goto out;
1da177e4
LT		 1943
1944 s->manufact.len = buf[0] << 8 | buf[1];
aec9f377 1945 if (s->manufact.len < 0) {
5944b2ce
JP		 1946 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n",
1947 s->manufact.len);
1da177e4
LT		 1948 ret = -EIO;
1949 } else {
aec9f377 1950 if (s->manufact.len > 2048) {
5944b2ce
JP		 1951 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n",
1952 s->manufact.len);
aec9f377
AM		 1953 s->manufact.len = 2048;
1954 }
1da177e4
LT		 1955 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1956 }
1957
d194139c 1958out:
1da177e4
LT		 1959 kfree(buf);
1960 return ret;
1961}
1962
d194139c
MS		 1963static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1964 struct packet_command *cgc)
1da177e4
LT		 1965{
1966 switch (s->type) {
1967 case DVD_STRUCT_PHYSICAL:
d194139c 1968 return dvd_read_physical(cdi, s, cgc);
1da177e4
LT		 1969
1970 case DVD_STRUCT_COPYRIGHT:
d194139c 1971 return dvd_read_copyright(cdi, s, cgc);
1da177e4
LT		 1972
1973 case DVD_STRUCT_DISCKEY:
d194139c 1974 return dvd_read_disckey(cdi, s, cgc);
1da177e4
LT		 1975
1976 case DVD_STRUCT_BCA:
d194139c 1977 return dvd_read_bca(cdi, s, cgc);
1da177e4
LT		 1978
1979 case DVD_STRUCT_MANUFACT:
d194139c 1980 return dvd_read_manufact(cdi, s, cgc);
1da177e4
LT		 1981
1982 default:
5944b2ce
JP		 1983 cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1984 s->type);
1da177e4
LT		 1985 return -EINVAL;
1986 }
1987}
1988
1989int cdrom_mode_sense(struct cdrom_device_info *cdi,
1990 struct packet_command *cgc,
1991 int page_code, int page_control)
1992{
853fe1bf 1993 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4
LT		 1994
1995 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1996
1997 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1998 cgc->cmd[2] = page_code | (page_control << 6);
1999 cgc->cmd[7] = cgc->buflen >> 8;
2000 cgc->cmd[8] = cgc->buflen & 0xff;
2001 cgc->data_direction = CGC_DATA_READ;
2002 return cdo->generic_packet(cdi, cgc);
2003}
2004
2005int cdrom_mode_select(struct cdrom_device_info *cdi,
2006 struct packet_command *cgc)
2007{
853fe1bf 2008 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4
LT		 2009
2010 memset(cgc->cmd, 0, sizeof(cgc->cmd));
2011 memset(cgc->buffer, 0, 2);
2012 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
2013 cgc->cmd[1] = 0x10; /* PF */
2014 cgc->cmd[7] = cgc->buflen >> 8;
2015 cgc->cmd[8] = cgc->buflen & 0xff;
2016 cgc->data_direction = CGC_DATA_WRITE;
2017 return cdo->generic_packet(cdi, cgc);
2018}
2019
2020static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
2021 struct cdrom_subchnl *subchnl, int mcn)
2022{
853fe1bf 2023 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4 2024 struct packet_command cgc;
fce53847 2025 char buffer[32];
1da177e4
LT		 2026 int ret;
2027
2028 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
2029 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
bf294e83 2030 cgc.cmd[1] = subchnl->cdsc_format;/* MSF or LBA addressing */
1da177e4
LT		 2031 cgc.cmd[2] = 0x40; /* request subQ data */
2032 cgc.cmd[3] = mcn ? 2 : 1;
2033 cgc.cmd[8] = 16;
2034
2035 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 2036 return ret;
1da177e4
LT		 2037
2038 subchnl->cdsc_audiostatus = cgc.buffer[1];
1da177e4
LT		 2039 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
2040 subchnl->cdsc_trk = cgc.buffer[6];
2041 subchnl->cdsc_ind = cgc.buffer[7];
2042
bf294e83 2043 if (subchnl->cdsc_format == CDROM_LBA) {
2044 subchnl->cdsc_absaddr.lba = ((cgc.buffer[8] << 24) |
2045 (cgc.buffer[9] << 16) |
2046 (cgc.buffer[10] << 8) |
2047 (cgc.buffer[11]));
2048 subchnl->cdsc_reladdr.lba = ((cgc.buffer[12] << 24) |
2049 (cgc.buffer[13] << 16) |
2050 (cgc.buffer[14] << 8) |
2051 (cgc.buffer[15]));
2052 } else {
2053 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
2054 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
2055 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
2056 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
2057 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
2058 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
2059 }
1da177e4 2060
fce53847 2061 return 0;
1da177e4
LT		 2062}
2063
2064/*
2065 * Specific READ_10 interface
2066 */
2067static int cdrom_read_cd(struct cdrom_device_info *cdi,
2068 struct packet_command *cgc, int lba,
2069 int blocksize, int nblocks)
2070{
853fe1bf 2071 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4
LT		 2072
2073 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2074 cgc->cmd[0] = GPCMD_READ_10;
2075 cgc->cmd[2] = (lba >> 24) & 0xff;
2076 cgc->cmd[3] = (lba >> 16) & 0xff;
2077 cgc->cmd[4] = (lba >> 8) & 0xff;
2078 cgc->cmd[5] = lba & 0xff;
2079 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2080 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2081 cgc->cmd[8] = nblocks & 0xff;
2082 cgc->buflen = blocksize * nblocks;
2083 return cdo->generic_packet(cdi, cgc);
2084}
2085
2086/* very generic interface for reading the various types of blocks */
2087static int cdrom_read_block(struct cdrom_device_info *cdi,
2088 struct packet_command *cgc,
2089 int lba, int nblocks, int format, int blksize)
2090{
853fe1bf 2091 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4
LT		 2092
2093 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2094 cgc->cmd[0] = GPCMD_READ_CD;
2095 /* expected sector size - cdda,mode1,etc. */
2096 cgc->cmd[1] = format << 2;
2097 /* starting address */
2098 cgc->cmd[2] = (lba >> 24) & 0xff;
2099 cgc->cmd[3] = (lba >> 16) & 0xff;
2100 cgc->cmd[4] = (lba >> 8) & 0xff;
2101 cgc->cmd[5] = lba & 0xff;
2102 /* number of blocks */
2103 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2104 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2105 cgc->cmd[8] = nblocks & 0xff;
2106 cgc->buflen = blksize * nblocks;
2107
2108 /* set the header info returned */
2109 switch (blksize) {
2110 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2111 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2112 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2113 default : cgc->cmd[9] = 0x10;
2114 }
2115
2116 return cdo->generic_packet(cdi, cgc);
2117}
2118
2119static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2120 int lba, int nframes)
2121{
2122 struct packet_command cgc;
2123 int ret = 0;
2124 int nr;
2125
2126 cdi->last_sense = 0;
2127
2128 memset(&cgc, 0, sizeof(cgc));
2129
2130 /*
2131 * start with will ra.nframes size, back down if alloc fails
2132 */
2133 nr = nframes;
2134 do {
6da2ec56 2135 cgc.buffer = kmalloc_array(nr, CD_FRAMESIZE_RAW, GFP_KERNEL);
1da177e4
LT		 2136 if (cgc.buffer)
2137 break;
2138
2139 nr >>= 1;
2140 } while (nr);
2141
2142 if (!nr)
2143 return -ENOMEM;
2144
1da177e4
LT		 2145 cgc.data_direction = CGC_DATA_READ;
2146 while (nframes > 0) {
2147 if (nr > nframes)
2148 nr = nframes;
2149
2150 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2151 if (ret)
2152 break;
822bfa51 2153 if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
1da177e4
LT		 2154 ret = -EFAULT;
2155 break;
2156 }
2157 ubuf += CD_FRAMESIZE_RAW * nr;
2158 nframes -= nr;
2159 lba += nr;
2160 }
1da177e4
LT		 2161 kfree(cgc.buffer);
2162 return ret;
2163}
2164
2165static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2166 int lba, int nframes)
2167{
165125e1 2168 struct request_queue *q = cdi->disk->queue;
1da177e4 2169 struct request *rq;
82ed4db4 2170 struct scsi_request *req;
1da177e4
LT		 2171 struct bio *bio;
2172 unsigned int len;
2173 int nr, ret = 0;
2174
2175 if (!q)
2176 return -ENXIO;
2177
73d17701
BVA		 2178 if (!blk_queue_scsi_passthrough(q)) {
2179 WARN_ONCE(true,
2180 "Attempt read CDDA info through a non-SCSI queue\n");
2181 return -EINVAL;
2182 }
2183
1da177e4
LT		 2184 cdi->last_sense = 0;
2185
2186 while (nframes) {
2187 nr = nframes;
2188 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2189 nr = 1;
ae03bf63
MP		 2190 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9))
2191 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW;
1da177e4
LT		 2192
2193 len = nr * CD_FRAMESIZE_RAW;
2194
ff005a06 2195 rq = blk_get_request(q, REQ_OP_SCSI_IN, 0);
a492f075
JL		 2196 if (IS_ERR(rq)) {
2197 ret = PTR_ERR(rq);
febd7a5c
AB		 2198 break;
2199 }
82ed4db4 2200 req = scsi_req(rq);
febd7a5c 2201
152e283f 2202 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
febd7a5c
AB		 2203 if (ret) {
2204 blk_put_request(rq);
dd1cab95 2205 break;
febd7a5c 2206 }
1da177e4 2207
82ed4db4
CH		 2208 req->cmd[0] = GPCMD_READ_CD;
2209 req->cmd[1] = 1 << 2;
2210 req->cmd[2] = (lba >> 24) & 0xff;
2211 req->cmd[3] = (lba >> 16) & 0xff;
2212 req->cmd[4] = (lba >> 8) & 0xff;
2213 req->cmd[5] = lba & 0xff;
2214 req->cmd[6] = (nr >> 16) & 0xff;
2215 req->cmd[7] = (nr >> 8) & 0xff;
2216 req->cmd[8] = nr & 0xff;
2217 req->cmd[9] = 0xf8;
2218
2219 req->cmd_len = 12;
1da177e4
LT		 2220 rq->timeout = 60 * HZ;
2221 bio = rq->bio;
2222
b7819b92 2223 blk_execute_rq(q, cdi->disk, rq, 0);
17d5363b 2224 if (scsi_req(rq)->result) {
4e178c17
KC		 2225 struct scsi_sense_hdr sshdr;
2226
1da177e4 2227 ret = -EIO;
4e178c17
KC		 2228 scsi_normalize_sense(req->sense, req->sense_len,
2229 &sshdr);
2230 cdi->last_sense = sshdr.sense_key;
1da177e4
LT		 2231 }
2232
8e5cfc45 2233 if (blk_rq_unmap_user(bio))
1da177e4 2234 ret = -EFAULT;
febd7a5c 2235 blk_put_request(rq);
1da177e4
LT		 2236
2237 if (ret)
2238 break;
2239
2240 nframes -= nr;
2241 lba += nr;
2242 ubuf += len;
2243 }
2244
2245 return ret;
2246}
2247
2248static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2249 int lba, int nframes)
2250{
2251 int ret;
2252
2253 if (cdi->cdda_method == CDDA_OLD)
2254 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2255
2256retry:
2257 /*
2258 * for anything else than success and io error, we need to retry
2259 */
2260 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2261 if (!ret || ret != -EIO)
2262 return ret;
2263
2264 /*
2265 * I've seen drives get sense 4/8/3 udma crc errors on multi
2266 * frame dma, so drop to single frame dma if we need to
2267 */
2268 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
e597cd09 2269 pr_info("dropping to single frame dma\n");
1da177e4
LT		 2270 cdi->cdda_method = CDDA_BPC_SINGLE;
2271 goto retry;
2272 }
2273
2274 /*
2275 * so we have an io error of some sort with multi frame dma. if the
2276 * condition wasn't a hardware error
2277 * problems, not for any error
2278 */
2279 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2280 return ret;
2281
e597cd09 2282 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
1da177e4
LT		 2283 cdi->cdda_method = CDDA_OLD;
2284 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2285}
2286
d2c5d4fc
CH		 2287static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2288 void __user *argp)
1da177e4 2289{
d2c5d4fc
CH		 2290 struct cdrom_multisession ms_info;
2291 u8 requested_format;
1da177e4
LT		 2292 int ret;
2293
5944b2ce 2294 cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
d2c5d4fc
CH		 2295
2296 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2297 return -ENOSYS;
2298
2299 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2300 return -EFAULT;
2301
2302 requested_format = ms_info.addr_format;
2303 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2304 return -EINVAL;
2305 ms_info.addr_format = CDROM_LBA;
2306
2307 ret = cdi->ops->get_last_session(cdi, &ms_info);
2308 if (ret)
1da177e4
LT		 2309 return ret;
2310
d2c5d4fc
CH		 2311 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2312
2313 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2314 return -EFAULT;
2315
5944b2ce 2316 cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
d2c5d4fc
CH		 2317 return 0;
2318}
2319
2320static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2321{
5944b2ce 2322 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n");
d2c5d4fc
CH		 2323
2324 if (!CDROM_CAN(CDC_OPEN_TRAY))
2325 return -ENOSYS;
cdccaa94 2326 if (cdi->use_count != 1 || cdi->keeplocked)
d2c5d4fc
CH		 2327 return -EBUSY;
2328 if (CDROM_CAN(CDC_LOCK)) {
2329 int ret = cdi->ops->lock_door(cdi, 0);
2330 if (ret)
1da177e4 2331 return ret;
d2c5d4fc 2332 }
1da177e4 2333
d2c5d4fc
CH		 2334 return cdi->ops->tray_move(cdi, 1);
2335}
1da177e4 2336
d2c5d4fc
CH		 2337static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2338{
5944b2ce 2339 cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
1da177e4 2340
d2c5d4fc
CH		 2341 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2342 return -ENOSYS;
2343 return cdi->ops->tray_move(cdi, 0);
2344}
1da177e4 2345
d2c5d4fc
CH		 2346static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2347 unsigned long arg)
2348{
5944b2ce 2349 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
1da177e4 2350
d2c5d4fc
CH		 2351 if (!CDROM_CAN(CDC_OPEN_TRAY))
2352 return -ENOSYS;
cdccaa94 2353 if (cdi->keeplocked)
d2c5d4fc 2354 return -EBUSY;
1da177e4 2355
d2c5d4fc
CH		 2356 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2357 if (arg)
2358 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2359 return 0;
2360}
1da177e4 2361
d2c5d4fc
CH		 2362static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2363 unsigned long arg)
2364{
2365 struct cdrom_changer_info *info;
2366 int ret;
1da177e4 2367
5944b2ce 2368 cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
1da177e4 2369
d2c5d4fc
CH		 2370 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2371 return -ENOSYS;
1da177e4 2372
d2c5d4fc
CH		 2373 /* cannot select disc or select current disc */
2374 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2375 return media_changed(cdi, 1);
1da177e4 2376
9de4ee40 2377 if (arg >= cdi->capacity)
d2c5d4fc 2378 return -EINVAL;
1da177e4 2379
d2c5d4fc
CH		 2380 info = kmalloc(sizeof(*info), GFP_KERNEL);
2381 if (!info)
2382 return -ENOMEM;
1da177e4 2383
d2c5d4fc
CH		 2384 ret = cdrom_read_mech_status(cdi, info);
2385 if (!ret)
2386 ret = info->slots[arg].change;
2387 kfree(info);
2388 return ret;
2389}
1da177e4 2390
d2c5d4fc
CH		 2391static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2392 unsigned long arg)
2393{
5944b2ce 2394 cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
1da177e4 2395
d2c5d4fc
CH		 2396 /*
2397 * Options need to be in sync with capability.
2398 * Too late for that, so we have to check each one separately.
2399 */
2400 switch (arg) {
2401 case CDO_USE_FFLAGS:
2402 case CDO_CHECK_TYPE:
2403 break;
2404 case CDO_LOCK:
2405 if (!CDROM_CAN(CDC_LOCK))
2406 return -ENOSYS;
2407 break;
2408 case 0:
2409 return cdi->options;
2410 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2411 default:
2412 if (!CDROM_CAN(arg))
1da177e4 2413 return -ENOSYS;
d2c5d4fc
CH		 2414 }
2415 cdi->options |= (int) arg;
2416 return cdi->options;
2417}
1da177e4 2418
d2c5d4fc
CH		 2419static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2420 unsigned long arg)
2421{
5944b2ce 2422 cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
1da177e4 2423
d2c5d4fc
CH		 2424 cdi->options &= ~(int) arg;
2425 return cdi->options;
2426}
1da177e4 2427
d2c5d4fc
CH		 2428static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2429 unsigned long arg)
2430{
5944b2ce 2431 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
1da177e4 2432
d2c5d4fc
CH		 2433 if (!CDROM_CAN(CDC_SELECT_SPEED))
2434 return -ENOSYS;
2435 return cdi->ops->select_speed(cdi, arg);
2436}
1da177e4 2437
d2c5d4fc
CH		 2438static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2439 unsigned long arg)
2440{
5944b2ce 2441 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
d2c5d4fc
CH		 2442
2443 if (!CDROM_CAN(CDC_SELECT_DISC))
2444 return -ENOSYS;
2445
2446 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
e4f3aa2e 2447 if (arg >= cdi->capacity)
d2c5d4fc
CH		 2448 return -EINVAL;
2449 }
2450
2451 /*
2452 * ->select_disc is a hook to allow a driver-specific way of
2453 * seleting disc. However, since there is no equivalent hook for
2454 * cdrom_slot_status this may not actually be useful...
2455 */
2456 if (cdi->ops->select_disc)
2457 return cdi->ops->select_disc(cdi, arg);
2458
5944b2ce 2459 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n");
d2c5d4fc
CH		 2460 return cdrom_select_disc(cdi, arg);
2461}
2462
2463static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2464 struct block_device *bdev)
2465{
5944b2ce 2466 cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n");
d2c5d4fc
CH		 2467
2468 if (!capable(CAP_SYS_ADMIN))
2469 return -EACCES;
2470 if (!CDROM_CAN(CDC_RESET))
2471 return -ENOSYS;
f98393a6 2472 invalidate_bdev(bdev);
d2c5d4fc
CH		 2473 return cdi->ops->reset(cdi);
2474}
2475
2476static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2477 unsigned long arg)
2478{
5944b2ce 2479 cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl");
d2c5d4fc
CH		 2480
2481 if (!CDROM_CAN(CDC_LOCK))
2482 return -EDRIVE_CANT_DO_THIS;
2483
cdccaa94 2484 cdi->keeplocked = arg ? 1 : 0;
d2c5d4fc
CH		 2485
2486 /*
2487 * Don't unlock the door on multiple opens by default, but allow
2488 * root to do so.
2489 */
2490 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2491 return -EBUSY;
2492 return cdi->ops->lock_door(cdi, arg);
2493}
2494
2495static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2496 unsigned long arg)
2497{
5944b2ce 2498 cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis");
d2c5d4fc
CH		 2499
2500 if (!capable(CAP_SYS_ADMIN))
2501 return -EACCES;
2502 debug = arg ? 1 : 0;
2503 return debug;
2504}
1da177e4 2505
d2c5d4fc
CH		 2506static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2507{
5944b2ce 2508 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
d2c5d4fc
CH		 2509 return (cdi->ops->capability & ~cdi->mask);
2510}
2511
2512/*
2513 * The following function is implemented, although very few audio
1da177e4
LT		 2514 * discs give Universal Product Code information, which should just be
2515 * the Medium Catalog Number on the box. Note, that the way the code
2516 * is written on the CD is /not/ uniform across all discs!
2517 */
d2c5d4fc
CH		 2518static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2519 void __user *argp)
2520{
2521 struct cdrom_mcn mcn;
2522 int ret;
1da177e4 2523
5944b2ce 2524 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
1da177e4 2525
d2c5d4fc
CH		 2526 if (!(cdi->ops->capability & CDC_MCN))
2527 return -ENOSYS;
2528 ret = cdi->ops->get_mcn(cdi, &mcn);
2529 if (ret)
2530 return ret;
1da177e4 2531
d2c5d4fc
CH		 2532 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2533 return -EFAULT;
5944b2ce 2534 cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
d2c5d4fc
CH		 2535 return 0;
2536}
1da177e4 2537
d2c5d4fc
CH		 2538static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2539 unsigned long arg)
2540{
5944b2ce 2541 cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
d2c5d4fc
CH		 2542
2543 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2544 return -ENOSYS;
2545 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2546 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2547 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
8f3fafc9 2548 if (arg >= cdi->capacity)
d2c5d4fc
CH		 2549 return -EINVAL;
2550 return cdrom_slot_status(cdi, arg);
2551}
2552
2553/*
2554 * Ok, this is where problems start. The current interface for the
2555 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
25985edc 2556 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this
d2c5d4fc
CH		 2557 * is often the case, it is also very common for CDs to have some tracks
2558 * with data, and some tracks with audio. Just because I feel like it,
2559 * I declare the following to be the best way to cope. If the CD has ANY
2560 * data tracks on it, it will be returned as a data CD. If it has any XA
2561 * tracks, I will return it as that. Now I could simplify this interface
2562 * by combining these returns with the above, but this more clearly
2563 * demonstrates the problem with the current interface. Too bad this
2564 * wasn't designed to use bitmasks... -Erik
2565 *
2566 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2567 * User level programmers might feel the ioctl is not very useful.
2568 * ---david
2569 */
2570static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2571{
2572 tracktype tracks;
2573
5944b2ce 2574 cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
d2c5d4fc
CH		 2575
2576 cdrom_count_tracks(cdi, &tracks);
2577 if (tracks.error)
2578 return tracks.error;
2579
2580 /* Policy mode on */
2581 if (tracks.audio > 0) {
2582 if (!tracks.data && !tracks.cdi && !tracks.xa)
2583 return CDS_AUDIO;
2584 else
2585 return CDS_MIXED;
1da177e4
LT		 2586 }
2587
d2c5d4fc
CH		 2588 if (tracks.cdi > 0)
2589 return CDS_XA_2_2;
2590 if (tracks.xa > 0)
2591 return CDS_XA_2_1;
2592 if (tracks.data > 0)
2593 return CDS_DATA_1;
2594 /* Policy mode off */
2595
5944b2ce 2596 cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n");
d2c5d4fc
CH		 2597 return CDS_NO_INFO;
2598}
2599
2600static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2601{
5944b2ce 2602 cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
d2c5d4fc
CH		 2603 return cdi->capacity;
2604}
2605
2606static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2607 void __user *argp)
2608{
2609 struct cdrom_subchnl q;
2610 u8 requested, back;
2611 int ret;
2612
5944b2ce 2613 /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
d2c5d4fc 2614
d2c5d4fc
CH		 2615 if (copy_from_user(&q, argp, sizeof(q)))
2616 return -EFAULT;
2617
2618 requested = q.cdsc_format;
2619 if (requested != CDROM_MSF && requested != CDROM_LBA)
2620 return -EINVAL;
2621 q.cdsc_format = CDROM_MSF;
2622
2623 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2624 if (ret)
2625 return ret;
2626
2627 back = q.cdsc_format; /* local copy */
2628 sanitize_format(&q.cdsc_absaddr, &back, requested);
2629 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2630
2631 if (copy_to_user(argp, &q, sizeof(q)))
2632 return -EFAULT;
5944b2ce 2633 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
d2c5d4fc
CH		 2634 return 0;
2635}
2636
2637static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2638 void __user *argp)
2639{
2640 struct cdrom_tochdr header;
2641 int ret;
2642
5944b2ce 2643 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
d2c5d4fc 2644
d2c5d4fc
CH		 2645 if (copy_from_user(&header, argp, sizeof(header)))
2646 return -EFAULT;
2647
2648 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2649 if (ret)
2650 return ret;
2651
2652 if (copy_to_user(argp, &header, sizeof(header)))
2653 return -EFAULT;
5944b2ce 2654 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
d2c5d4fc
CH		 2655 return 0;
2656}
2657
2658static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2659 void __user *argp)
2660{
2661 struct cdrom_tocentry entry;
2662 u8 requested_format;
2663 int ret;
2664
5944b2ce 2665 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
d2c5d4fc 2666
d2c5d4fc
CH		 2667 if (copy_from_user(&entry, argp, sizeof(entry)))
2668 return -EFAULT;
2669
2670 requested_format = entry.cdte_format;
2671 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2672 return -EINVAL;
2673 /* make interface to low-level uniform */
2674 entry.cdte_format = CDROM_MSF;
2675 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2676 if (ret)
2677 return ret;
2678 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2679
2680 if (copy_to_user(argp, &entry, sizeof(entry)))
2681 return -EFAULT;
5944b2ce 2682 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
d2c5d4fc
CH		 2683 return 0;
2684}
2685
2686static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2687 void __user *argp)
2688{
2689 struct cdrom_msf msf;
2690
5944b2ce 2691 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
d2c5d4fc
CH		 2692
2693 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2694 return -ENOSYS;
2695 if (copy_from_user(&msf, argp, sizeof(msf)))
2696 return -EFAULT;
2697 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2698}
2699
2700static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2701 void __user *argp)
2702{
2703 struct cdrom_ti ti;
2704 int ret;
2705
5944b2ce 2706 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
d2c5d4fc
CH		 2707
2708 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2709 return -ENOSYS;
2710 if (copy_from_user(&ti, argp, sizeof(ti)))
2711 return -EFAULT;
2712
2713 ret = check_for_audio_disc(cdi, cdi->ops);
2714 if (ret)
2715 return ret;
2716 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2717}
2718static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2719 void __user *argp)
2720{
2721 struct cdrom_volctrl volume;
2722
5944b2ce 2723 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
d2c5d4fc
CH		 2724
2725 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2726 return -ENOSYS;
2727 if (copy_from_user(&volume, argp, sizeof(volume)))
2728 return -EFAULT;
2729 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2730}
2731
2732static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2733 void __user *argp)
2734{
2735 struct cdrom_volctrl volume;
2736 int ret;
2737
5944b2ce 2738 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
d2c5d4fc
CH		 2739
2740 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2741 return -ENOSYS;
2742
2743 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2744 if (ret)
2745 return ret;
2746
2747 if (copy_to_user(argp, &volume, sizeof(volume)))
2748 return -EFAULT;
2749 return 0;
2750}
2751
2752static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2753 unsigned int cmd)
2754{
2755 int ret;
2756
5944b2ce 2757 cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
d2c5d4fc
CH		 2758
2759 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2760 return -ENOSYS;
2761 ret = check_for_audio_disc(cdi, cdi->ops);
2762 if (ret)
2763 return ret;
2764 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2765}
2766
1da177e4
LT		 2767/*
2768 * Required when we need to use READ_10 to issue other than 2048 block
2769 * reads
2770 */
2771static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2772{
853fe1bf 2773 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4
LT		 2774 struct packet_command cgc;
2775 struct modesel_head mh;
2776
2777 memset(&mh, 0, sizeof(mh));
2778 mh.block_desc_length = 0x08;
2779 mh.block_length_med = (size >> 8) & 0xff;
2780 mh.block_length_lo = size & 0xff;
2781
2782 memset(&cgc, 0, sizeof(cgc));
2783 cgc.cmd[0] = 0x15;
2784 cgc.cmd[1] = 1 << 4;
2785 cgc.cmd[4] = 12;
2786 cgc.buflen = sizeof(mh);
2787 cgc.buffer = (char *) &mh;
2788 cgc.data_direction = CGC_DATA_WRITE;
2789 mh.block_desc_length = 0x08;
2790 mh.block_length_med = (size >> 8) & 0xff;
2791 mh.block_length_lo = size & 0xff;
2792
2793 return cdo->generic_packet(cdi, &cgc);
2794}
2795
e1e60fda
JP		 2796static int cdrom_get_track_info(struct cdrom_device_info *cdi,
2797 __u16 track, __u8 type, track_information *ti)
2798{
853fe1bf 2799 const struct cdrom_device_ops *cdo = cdi->ops;
e1e60fda
JP		 2800 struct packet_command cgc;
2801 int ret, buflen;
2802
2803 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
2804 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
2805 cgc.cmd[1] = type & 3;
2806 cgc.cmd[4] = (track & 0xff00) >> 8;
2807 cgc.cmd[5] = track & 0xff;
2808 cgc.cmd[8] = 8;
2809 cgc.quiet = 1;
2810
2811 ret = cdo->generic_packet(cdi, &cgc);
2812 if (ret)
2813 return ret;
2814
2815 buflen = be16_to_cpu(ti->track_information_length) +
2816 sizeof(ti->track_information_length);
2817
2818 if (buflen > sizeof(track_information))
2819 buflen = sizeof(track_information);
2820
2821 cgc.cmd[8] = cgc.buflen = buflen;
2822 ret = cdo->generic_packet(cdi, &cgc);
2823 if (ret)
2824 return ret;
2825
2826 /* return actual fill size */
2827 return buflen;
2828}
2829
2830/* return the last written block on the CD-R media. this is for the udf
2831 file system. */
2832int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
2833{
2834 struct cdrom_tocentry toc;
2835 disc_information di;
2836 track_information ti;
2837 __u32 last_track;
2838 int ret = -1, ti_size;
2839
2840 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2841 goto use_toc;
2842
2843 ret = cdrom_get_disc_info(cdi, &di);
2844 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
2845 + sizeof(di.last_track_lsb)))
2846 goto use_toc;
2847
2848 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2849 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2850 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2851 if (ti_size < (int)offsetof(typeof(ti), track_start))
2852 goto use_toc;
2853
2854 /* if this track is blank, try the previous. */
2855 if (ti.blank) {
2856 if (last_track == 1)
2857 goto use_toc;
2858 last_track--;
2859 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2860 }
2861
2862 if (ti_size < (int)(offsetof(typeof(ti), track_size)
2863 + sizeof(ti.track_size)))
2864 goto use_toc;
2865
2866 /* if last recorded field is valid, return it. */
2867 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
2868 + sizeof(ti.last_rec_address))) {
2869 *last_written = be32_to_cpu(ti.last_rec_address);
2870 } else {
2871 /* make it up instead */
2872 *last_written = be32_to_cpu(ti.track_start) +
2873 be32_to_cpu(ti.track_size);
2874 if (ti.free_blocks)
2875 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
2876 }
2877 return 0;
2878
2879 /* this is where we end up if the drive either can't do a
2880 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
2881 it doesn't give enough information or fails. then we return
2882 the toc contents. */
2883use_toc:
2884 toc.cdte_format = CDROM_MSF;
2885 toc.cdte_track = CDROM_LEADOUT;
2886 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
2887 return ret;
2888 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
2889 *last_written = toc.cdte_addr.lba;
2890 return 0;
2891}
2892
dac1c5cf
JP		 2893/* return the next writable block. also for udf file system. */
2894static int cdrom_get_next_writable(struct cdrom_device_info *cdi,
2895 long *next_writable)
2896{
2897 disc_information di;
2898 track_information ti;
2899 __u16 last_track;
2900 int ret, ti_size;
2901
2902 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2903 goto use_last_written;
2904
2905 ret = cdrom_get_disc_info(cdi, &di);
2906 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
2907 + sizeof(di.last_track_lsb))
2908 goto use_last_written;
2909
2910 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2911 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2912 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2913 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
2914 goto use_last_written;
2915
2916 /* if this track is blank, try the previous. */
2917 if (ti.blank) {
2918 if (last_track == 1)
2919 goto use_last_written;
2920 last_track--;
2921 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2922 if (ti_size < 0)
2923 goto use_last_written;
2924 }
2925
2926 /* if next recordable address field is valid, use it. */
2927 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
2928 + sizeof(ti.next_writable)) {
2929 *next_writable = be32_to_cpu(ti.next_writable);
2930 return 0;
2931 }
2932
2933use_last_written:
2934 ret = cdrom_get_last_written(cdi, next_writable);
2935 if (ret) {
2936 *next_writable = 0;
2937 return ret;
2938 } else {
2939 *next_writable += 7;
2940 return 0;
2941 }
2942}
2943
3147c531 2944static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2e9aa08a
JP		 2945 void __user *arg,
2946 struct packet_command *cgc,
2947 int cmd)
3147c531 2948{
e7d0748d 2949 struct scsi_sense_hdr sshdr;
3147c531
MS		 2950 struct cdrom_msf msf;
2951 int blocksize = 0, format = 0, lba;
2952 int ret;
1da177e4 2953
1da177e4
LT		 2954 switch (cmd) {
2955 case CDROMREADRAW:
3147c531
MS		 2956 blocksize = CD_FRAMESIZE_RAW;
2957 break;
1da177e4 2958 case CDROMREADMODE1:
3147c531
MS		 2959 blocksize = CD_FRAMESIZE;
2960 format = 2;
2961 break;
2962 case CDROMREADMODE2:
2963 blocksize = CD_FRAMESIZE_RAW0;
2964 break;
2965 }
a09c391d
JP		 2966 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
2967 return -EFAULT;
3147c531
MS		 2968 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2969 /* FIXME: we need upper bound checking, too!! */
2970 if (lba < 0)
2971 return -EINVAL;
2972
542db015 2973 cgc->buffer = kzalloc(blocksize, GFP_KERNEL);
3147c531
MS		 2974 if (cgc->buffer == NULL)
2975 return -ENOMEM;
2976
e7d0748d
KC		 2977 memset(&sshdr, 0, sizeof(sshdr));
2978 cgc->sshdr = &sshdr;
3147c531
MS		 2979 cgc->data_direction = CGC_DATA_READ;
2980 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
e7d0748d
KC		 2981 if (ret && sshdr.sense_key == 0x05 &&
2982 sshdr.asc == 0x20 &&
2983 sshdr.ascq == 0x00) {
3147c531
MS		 2984 /*
2985 * SCSI-II devices are not required to support
2986 * READ_CD, so let's try switching block size
2987 */
2988 /* FIXME: switch back again... */
2989 ret = cdrom_switch_blocksize(cdi, blocksize);
2990 if (ret)
2991 goto out;
e7d0748d 2992 cgc->sshdr = NULL;
3147c531
MS		 2993 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
2994 ret |= cdrom_switch_blocksize(cdi, blocksize);
2995 }
2996 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
2997 ret = -EFAULT;
2998out:
2999 kfree(cgc->buffer);
3000 return ret;
3001}
3002
3003static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
2e9aa08a 3004 void __user *arg)
3147c531
MS		 3005{
3006 struct cdrom_read_audio ra;
3007 int lba;
3008
a09c391d
JP		 3009 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg,
3010 sizeof(ra)))
3011 return -EFAULT;
3147c531
MS		 3012
3013 if (ra.addr_format == CDROM_MSF)
3014 lba = msf_to_lba(ra.addr.msf.minute,
3015 ra.addr.msf.second,
3016 ra.addr.msf.frame);
3017 else if (ra.addr_format == CDROM_LBA)
3018 lba = ra.addr.lba;
3019 else
3020 return -EINVAL;
3021
3022 /* FIXME: we need upper bound checking, too!! */
3023 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
3024 return -EINVAL;
3025
3026 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
3027}
3028
3029static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
2e9aa08a 3030 void __user *arg)
3147c531
MS		 3031{
3032 int ret;
3033 struct cdrom_subchnl q;
3034 u_char requested, back;
a09c391d
JP		 3035 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q)))
3036 return -EFAULT;
3147c531
MS		 3037 requested = q.cdsc_format;
3038 if (!((requested == CDROM_MSF) ||
3039 (requested == CDROM_LBA)))
3040 return -EINVAL;
bf294e83 3041
3147c531
MS		 3042 ret = cdrom_read_subchannel(cdi, &q, 0);
3043 if (ret)
1da177e4 3044 return ret;
3147c531
MS		 3045 back = q.cdsc_format; /* local copy */
3046 sanitize_format(&q.cdsc_absaddr, &back, requested);
3047 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
a09c391d
JP		 3048 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q)))
3049 return -EFAULT;
5944b2ce 3050 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
3147c531
MS		 3051 return 0;
3052}
1da177e4 3053
3147c531 3054static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
2e9aa08a
JP		 3055 void __user *arg,
3056 struct packet_command *cgc)
3147c531 3057{
853fe1bf 3058 const struct cdrom_device_ops *cdo = cdi->ops;
3147c531 3059 struct cdrom_msf msf;
5944b2ce 3060 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
a09c391d
JP		 3061 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
3062 return -EFAULT;
3147c531
MS		 3063 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
3064 cgc->cmd[3] = msf.cdmsf_min0;
3065 cgc->cmd[4] = msf.cdmsf_sec0;
3066 cgc->cmd[5] = msf.cdmsf_frame0;
3067 cgc->cmd[6] = msf.cdmsf_min1;
3068 cgc->cmd[7] = msf.cdmsf_sec1;
3069 cgc->cmd[8] = msf.cdmsf_frame1;
3070 cgc->data_direction = CGC_DATA_NONE;
3071 return cdo->generic_packet(cdi, cgc);
3072}
1da177e4 3073
3147c531 3074static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
2e9aa08a
JP		 3075 void __user *arg,
3076 struct packet_command *cgc)
3147c531 3077{
853fe1bf 3078 const struct cdrom_device_ops *cdo = cdi->ops;
3147c531 3079 struct cdrom_blk blk;
5944b2ce 3080 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
a09c391d
JP		 3081 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk)))
3082 return -EFAULT;
3147c531
MS		 3083 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
3084 cgc->cmd[2] = (blk.from >> 24) & 0xff;
3085 cgc->cmd[3] = (blk.from >> 16) & 0xff;
3086 cgc->cmd[4] = (blk.from >> 8) & 0xff;
3087 cgc->cmd[5] = blk.from & 0xff;
3088 cgc->cmd[7] = (blk.len >> 8) & 0xff;
3089 cgc->cmd[8] = blk.len & 0xff;
3090 cgc->data_direction = CGC_DATA_NONE;
3091 return cdo->generic_packet(cdi, cgc);
3092}
1da177e4 3093
3147c531 3094static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
2e9aa08a
JP		 3095 void __user *arg,
3096 struct packet_command *cgc,
3097 unsigned int cmd)
3147c531
MS		 3098{
3099 struct cdrom_volctrl volctrl;
3100 unsigned char buffer[32];
3101 char mask[sizeof(buffer)];
3102 unsigned short offset;
3103 int ret;
3104
5944b2ce 3105 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n");
1da177e4 3106
a09c391d
JP		 3107 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg,
3108 sizeof(volctrl)))
3109 return -EFAULT;
1da177e4 3110
3147c531
MS		 3111 cgc->buffer = buffer;
3112 cgc->buflen = 24;
3113 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3114 if (ret)
3115 return ret;
1da177e4 3116
3147c531
MS		 3117 /* originally the code depended on buffer[1] to determine
3118 how much data is available for transfer. buffer[1] is
3119 unfortunately ambigious and the only reliable way seem
3120 to be to simply skip over the block descriptor... */
3121 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3122
3123 if (offset + 16 > sizeof(buffer))
3124 return -E2BIG;
3125
3126 if (offset + 16 > cgc->buflen) {
3127 cgc->buflen = offset + 16;
3128 ret = cdrom_mode_sense(cdi, cgc,
2e9aa08a 3129 GPMODE_AUDIO_CTL_PAGE, 0);
3147c531
MS		 3130 if (ret)
3131 return ret;
3132 }
1da177e4 3133
3147c531
MS		 3134 /* sanity check */
3135 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
2e9aa08a 3136 buffer[offset + 1] < 14)
3147c531 3137 return -EINVAL;
1da177e4 3138
3147c531
MS		 3139 /* now we have the current volume settings. if it was only
3140 a CDROMVOLREAD, return these values */
3141 if (cmd == CDROMVOLREAD) {
3142 volctrl.channel0 = buffer[offset+9];
3143 volctrl.channel1 = buffer[offset+11];
3144 volctrl.channel2 = buffer[offset+13];
3145 volctrl.channel3 = buffer[offset+15];
a09c391d
JP		 3146 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl,
3147 sizeof(volctrl)))
3148 return -EFAULT;
3147c531
MS		 3149 return 0;
3150 }
1da177e4 3151
3147c531
MS		 3152 /* get the volume mask */
3153 cgc->buffer = mask;
3154 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3155 if (ret)
3156 return ret;
1da177e4 3157
3147c531
MS		 3158 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3159 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3160 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3161 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
1da177e4 3162
3147c531
MS		 3163 /* set volume */
3164 cgc->buffer = buffer + offset - 8;
3165 memset(cgc->buffer, 0, 8);
3166 return cdrom_mode_select(cdi, cgc);
3167}
1da177e4 3168
3147c531 3169static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
2e9aa08a
JP		 3170 struct packet_command *cgc,
3171 int cmd)
3147c531 3172{
853fe1bf 3173 const struct cdrom_device_ops *cdo = cdi->ops;
5944b2ce 3174 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3147c531
MS		 3175 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3176 cgc->cmd[1] = 1;
3177 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3178 cgc->data_direction = CGC_DATA_NONE;
3179 return cdo->generic_packet(cdi, cgc);
3180}
1da177e4 3181
3147c531 3182static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
2e9aa08a
JP		 3183 struct packet_command *cgc,
3184 int cmd)
3147c531 3185{
853fe1bf 3186 const struct cdrom_device_ops *cdo = cdi->ops;
5944b2ce 3187 cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3147c531
MS		 3188 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3189 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3190 cgc->data_direction = CGC_DATA_NONE;
3191 return cdo->generic_packet(cdi, cgc);
3192}
1da177e4 3193
3147c531 3194static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
2e9aa08a
JP		 3195 void __user *arg,
3196 struct packet_command *cgc)
3147c531
MS		 3197{
3198 int ret;
3199 dvd_struct *s;
3200 int size = sizeof(dvd_struct);
3201
3202 if (!CDROM_CAN(CDC_DVD))
3203 return -ENOSYS;
3204
abb0f6a7
AV		 3205 s = memdup_user(arg, size);
3206 if (IS_ERR(s))
3207 return PTR_ERR(s);
3147c531 3208
5944b2ce 3209 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3147c531 3210
d194139c 3211 ret = dvd_read_struct(cdi, s, cgc);
3147c531
MS		 3212 if (ret)
3213 goto out;
3214
3215 if (copy_to_user(arg, s, size))
3216 ret = -EFAULT;
3217out:
3218 kfree(s);
3219 return ret;
3220}
3221
3222static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
2e9aa08a 3223 void __user *arg)
3147c531
MS		 3224{
3225 int ret;
3226 dvd_authinfo ai;
3227 if (!CDROM_CAN(CDC_DVD))
3228 return -ENOSYS;
5944b2ce 3229 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n");
a09c391d
JP		 3230 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai)))
3231 return -EFAULT;
3147c531
MS		 3232 ret = dvd_do_auth(cdi, &ai);
3233 if (ret)
1da177e4 3234 return ret;
a09c391d
JP		 3235 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai)))
3236 return -EFAULT;
3147c531
MS		 3237 return 0;
3238}
1da177e4 3239
3147c531 3240static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
2e9aa08a 3241 void __user *arg)
3147c531
MS		 3242{
3243 int ret;
3244 long next = 0;
5944b2ce 3245 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3147c531
MS		 3246 ret = cdrom_get_next_writable(cdi, &next);
3247 if (ret)
3248 return ret;
a09c391d
JP		 3249 if (copy_to_user((long __user *)arg, &next, sizeof(next)))
3250 return -EFAULT;
3147c531
MS		 3251 return 0;
3252}
1da177e4 3253
3147c531 3254static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
2e9aa08a 3255 void __user *arg)
3147c531
MS		 3256{
3257 int ret;
3258 long last = 0;
5944b2ce 3259 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3147c531
MS		 3260 ret = cdrom_get_last_written(cdi, &last);
3261 if (ret)
3262 return ret;
a09c391d
JP		 3263 if (copy_to_user((long __user *)arg, &last, sizeof(last)))
3264 return -EFAULT;
3147c531
MS		 3265 return 0;
3266}
3267
3268static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3269 unsigned long arg)
3270{
3271 struct packet_command cgc;
3272 void __user *userptr = (void __user *)arg;
3273
3274 memset(&cgc, 0, sizeof(cgc));
3275
3276 /* build a unified command and queue it through
3277 cdo->generic_packet() */
3278 switch (cmd) {
3279 case CDROMREADRAW:
3280 case CDROMREADMODE1:
3281 case CDROMREADMODE2:
3282 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3283 case CDROMREADAUDIO:
3284 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3285 case CDROMSUBCHNL:
3286 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3287 case CDROMPLAYMSF:
3288 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3289 case CDROMPLAYBLK:
3290 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3291 case CDROMVOLCTRL:
3292 case CDROMVOLREAD:
3293 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3294 case CDROMSTART:
3295 case CDROMSTOP:
3296 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3297 case CDROMPAUSE:
3298 case CDROMRESUME:
3299 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3300 case DVD_READ_STRUCT:
d194139c 3301 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3147c531
MS		 3302 case DVD_AUTH:
3303 return mmc_ioctl_dvd_auth(cdi, userptr);
3304 case CDROM_NEXT_WRITABLE:
3305 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3306 case CDROM_LAST_WRITTEN:
3307 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3308 }
1da177e4
LT		 3309
3310 return -ENOTTY;
3311}
3312
2e9aa08a
JP		 3313/*
3314 * Just about every imaginable ioctl is supported in the Uniform layer
3315 * these days.
3316 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
3317 */
3318int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
3319 fmode_t mode, unsigned int cmd, unsigned long arg)
3320{
3321 void __user *argp = (void __user *)arg;
3322 int ret;
3323
3324 /*
3325 * Try the generic SCSI command ioctl's first.
3326 */
3327 ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
3328 if (ret != -ENOTTY)
3329 return ret;
3330
3331 switch (cmd) {
3332 case CDROMMULTISESSION:
3333 return cdrom_ioctl_multisession(cdi, argp);
3334 case CDROMEJECT:
3335 return cdrom_ioctl_eject(cdi);
3336 case CDROMCLOSETRAY:
3337 return cdrom_ioctl_closetray(cdi);
3338 case CDROMEJECT_SW:
3339 return cdrom_ioctl_eject_sw(cdi, arg);
3340 case CDROM_MEDIA_CHANGED:
3341 return cdrom_ioctl_media_changed(cdi, arg);
3342 case CDROM_SET_OPTIONS:
3343 return cdrom_ioctl_set_options(cdi, arg);
3344 case CDROM_CLEAR_OPTIONS:
3345 return cdrom_ioctl_clear_options(cdi, arg);
3346 case CDROM_SELECT_SPEED:
3347 return cdrom_ioctl_select_speed(cdi, arg);
3348 case CDROM_SELECT_DISC:
3349 return cdrom_ioctl_select_disc(cdi, arg);
3350 case CDROMRESET:
3351 return cdrom_ioctl_reset(cdi, bdev);
3352 case CDROM_LOCKDOOR:
3353 return cdrom_ioctl_lock_door(cdi, arg);
3354 case CDROM_DEBUG:
3355 return cdrom_ioctl_debug(cdi, arg);
3356 case CDROM_GET_CAPABILITY:
3357 return cdrom_ioctl_get_capability(cdi);
3358 case CDROM_GET_MCN:
3359 return cdrom_ioctl_get_mcn(cdi, argp);
3360 case CDROM_DRIVE_STATUS:
3361 return cdrom_ioctl_drive_status(cdi, arg);
3362 case CDROM_DISC_STATUS:
3363 return cdrom_ioctl_disc_status(cdi);
3364 case CDROM_CHANGER_NSLOTS:
3365 return cdrom_ioctl_changer_nslots(cdi);
3366 }
3367
3368 /*
3369 * Use the ioctls that are implemented through the generic_packet()
3370 * interface. this may look at bit funny, but if -ENOTTY is
3371 * returned that particular ioctl is not implemented and we
3372 * let it go through the device specific ones.
3373 */
3374 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
3375 ret = mmc_ioctl(cdi, cmd, arg);
3376 if (ret != -ENOTTY)
3377 return ret;
3378 }
3379
3380 /*
3381 * Note: most of the cd_dbg() calls are commented out here,
3382 * because they fill up the sys log when CD players poll
3383 * the drive.
3384 */
3385 switch (cmd) {
3386 case CDROMSUBCHNL:
3387 return cdrom_ioctl_get_subchnl(cdi, argp);
3388 case CDROMREADTOCHDR:
3389 return cdrom_ioctl_read_tochdr(cdi, argp);
3390 case CDROMREADTOCENTRY:
3391 return cdrom_ioctl_read_tocentry(cdi, argp);
3392 case CDROMPLAYMSF:
3393 return cdrom_ioctl_play_msf(cdi, argp);
3394 case CDROMPLAYTRKIND:
3395 return cdrom_ioctl_play_trkind(cdi, argp);
3396 case CDROMVOLCTRL:
3397 return cdrom_ioctl_volctrl(cdi, argp);
3398 case CDROMVOLREAD:
3399 return cdrom_ioctl_volread(cdi, argp);
3400 case CDROMSTART:
3401 case CDROMSTOP:
3402 case CDROMPAUSE:
3403 case CDROMRESUME:
3404 return cdrom_ioctl_audioctl(cdi, cmd);
3405 }
3406
3407 return -ENOSYS;
3408}
3409
1da177e4
LT		 3410EXPORT_SYMBOL(cdrom_get_last_written);
3411EXPORT_SYMBOL(register_cdrom);
3412EXPORT_SYMBOL(unregister_cdrom);
3413EXPORT_SYMBOL(cdrom_open);
3414EXPORT_SYMBOL(cdrom_release);
3415EXPORT_SYMBOL(cdrom_ioctl);
3416EXPORT_SYMBOL(cdrom_media_changed);
3417EXPORT_SYMBOL(cdrom_number_of_slots);
3418EXPORT_SYMBOL(cdrom_mode_select);
3419EXPORT_SYMBOL(cdrom_mode_sense);
3420EXPORT_SYMBOL(init_cdrom_command);
3421EXPORT_SYMBOL(cdrom_get_media_event);
3422
3423#ifdef CONFIG_SYSCTL
3424
3425#define CDROM_STR_SIZE 1000
3426
3427static struct cdrom_sysctl_settings {
3428 char info[CDROM_STR_SIZE]; /* general info */
3429 int autoclose; /* close tray upon mount, etc */
3430 int autoeject; /* eject on umount */
3431 int debug; /* turn on debugging messages */
3432 int lock; /* lock the door on device open */
3433 int check; /* check media type */
3434} cdrom_sysctl_settings;
3435
554988d6
DY		 3436enum cdrom_print_option {
3437 CTL_NAME,
3438 CTL_SPEED,
3439 CTL_SLOTS,
3440 CTL_CAPABILITY
3441};
3442
3443static int cdrom_print_info(const char *header, int val, char *info,
3444 int *pos, enum cdrom_print_option option)
3445{
3446 const int max_size = sizeof(cdrom_sysctl_settings.info);
3447 struct cdrom_device_info *cdi;
3448 int ret;
3449
3450 ret = scnprintf(info + *pos, max_size - *pos, header);
3451 if (!ret)
3452 return 1;
3453
3454 *pos += ret;
3455
7fd097d4 3456 list_for_each_entry(cdi, &cdrom_list, list) {
554988d6
DY		 3457 switch (option) {
3458 case CTL_NAME:
3459 ret = scnprintf(info + *pos, max_size - *pos,
3460 "\t%s", cdi->name);
3461 break;
3462 case CTL_SPEED:
3463 ret = scnprintf(info + *pos, max_size - *pos,
3464 "\t%d", cdi->speed);
3465 break;
3466 case CTL_SLOTS:
3467 ret = scnprintf(info + *pos, max_size - *pos,
3468 "\t%d", cdi->capacity);
3469 break;
3470 case CTL_CAPABILITY:
3471 ret = scnprintf(info + *pos, max_size - *pos,
3472 "\t%d", CDROM_CAN(val) != 0);
3473 break;
3474 default:
e597cd09 3475 pr_info("invalid option%d\n", option);
554988d6
DY		 3476 return 1;
3477 }
3478 if (!ret)
3479 return 1;
3480 *pos += ret;
3481 }
3482
3483 return 0;
3484}
3485
90a3b89e 3486static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
1da177e4
LT		 3487 void __user *buffer, size_t *lenp, loff_t *ppos)
3488{
554988d6 3489 int pos;
1da177e4 3490 char *info = cdrom_sysctl_settings.info;
554988d6 3491 const int max_size = sizeof(cdrom_sysctl_settings.info);
1da177e4
LT		 3492
3493 if (!*lenp || (*ppos && !write)) {
3494 *lenp = 0;
3495 return 0;
3496 }
3497
554988d6
DY		 3498 mutex_lock(&cdrom_mutex);
3499
1da177e4
LT		 3500 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3501
554988d6
DY		 3502 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3503 goto done;
3504 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3505 goto done;
3506 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3507 goto done;
3508 if (cdrom_print_info("\nCan close tray:\t",
3509 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3510 goto done;
3511 if (cdrom_print_info("\nCan open tray:\t",
3512 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3513 goto done;
3514 if (cdrom_print_info("\nCan lock tray:\t",
3515 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3516 goto done;
3517 if (cdrom_print_info("\nCan change speed:",
3518 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3519 goto done;
3520 if (cdrom_print_info("\nCan select disk:",
3521 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3522 goto done;
3523 if (cdrom_print_info("\nCan read multisession:",
3524 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3525 goto done;
3526 if (cdrom_print_info("\nCan read MCN:\t",
3527 CDC_MCN, info, &pos, CTL_CAPABILITY))
3528 goto done;
3529 if (cdrom_print_info("\nReports media changed:",
3530 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3531 goto done;
3532 if (cdrom_print_info("\nCan play audio:\t",
3533 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3534 goto done;
3535 if (cdrom_print_info("\nCan write CD-R:\t",
3536 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3537 goto done;
3538 if (cdrom_print_info("\nCan write CD-RW:",
3539 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3540 goto done;
3541 if (cdrom_print_info("\nCan read DVD:\t",
3542 CDC_DVD, info, &pos, CTL_CAPABILITY))
3543 goto done;
3544 if (cdrom_print_info("\nCan write DVD-R:",
3545 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3546 goto done;
3547 if (cdrom_print_info("\nCan write DVD-RAM:",
3548 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3549 goto done;
3550 if (cdrom_print_info("\nCan read MRW:\t",
3551 CDC_MRW, info, &pos, CTL_CAPABILITY))
3552 goto done;
3553 if (cdrom_print_info("\nCan write MRW:\t",
3554 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3555 goto done;
3556 if (cdrom_print_info("\nCan write RAM:\t",
3557 CDC_RAM, info, &pos, CTL_CAPABILITY))
3558 goto done;
3559 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3560 goto done;
3561doit:
3562 mutex_unlock(&cdrom_mutex);
8d65af78 3563 return proc_dostring(ctl, write, buffer, lenp, ppos);
554988d6 3564done:
e597cd09 3565 pr_info("info buffer too small\n");
554988d6 3566 goto doit;
1da177e4
LT		 3567}
3568
3569/* Unfortunately, per device settings are not implemented through
3570 procfs/sysctl yet. When they are, this will naturally disappear. For now
3571 just update all drives. Later this will become the template on which
3572 new registered drives will be based. */
3573static void cdrom_update_settings(void)
3574{
3575 struct cdrom_device_info *cdi;
3576
032d8d90 3577 mutex_lock(&cdrom_mutex);
7fd097d4 3578 list_for_each_entry(cdi, &cdrom_list, list) {
1da177e4
LT		 3579 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3580 cdi->options |= CDO_AUTO_CLOSE;
3581 else if (!autoclose)
3582 cdi->options &= ~CDO_AUTO_CLOSE;
3583 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3584 cdi->options |= CDO_AUTO_EJECT;
3585 else if (!autoeject)
3586 cdi->options &= ~CDO_AUTO_EJECT;
3587 if (lockdoor && CDROM_CAN(CDC_LOCK))
3588 cdi->options |= CDO_LOCK;
3589 else if (!lockdoor)
3590 cdi->options &= ~CDO_LOCK;
3591 if (check_media_type)
3592 cdi->options |= CDO_CHECK_TYPE;
3593 else
3594 cdi->options &= ~CDO_CHECK_TYPE;
3595 }
032d8d90 3596 mutex_unlock(&cdrom_mutex);
1da177e4
LT		 3597}
3598
90a3b89e 3599static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
1da177e4
LT		 3600 void __user *buffer, size_t *lenp, loff_t *ppos)
3601{
1da177e4
LT		 3602 int ret;
3603
8d65af78 3604 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
1da177e4 3605
06489b4e 3606 if (write) {
1da177e4
LT		 3607
3608 /* we only care for 1 or 0. */
06489b4e
EB		 3609 autoclose = !!cdrom_sysctl_settings.autoclose;
3610 autoeject = !!cdrom_sysctl_settings.autoeject;
3611 debug = !!cdrom_sysctl_settings.debug;
3612 lockdoor = !!cdrom_sysctl_settings.lock;
3613 check_media_type = !!cdrom_sysctl_settings.check;
1da177e4 3614
1da177e4
LT		 3615 /* update the option flags according to the changes. we
3616 don't have per device options through sysctl yet,
3617 but we will have and then this will disappear. */
3618 cdrom_update_settings();
3619 }
3620
3621 return ret;
3622}
3623
3624/* Place files in /proc/sys/dev/cdrom */
90a3b89e 3625static struct ctl_table cdrom_table[] = {
1da177e4 3626 {
1da177e4
LT		 3627 .procname = "info",
3628 .data = &cdrom_sysctl_settings.info,
3629 .maxlen = CDROM_STR_SIZE,
3630 .mode = 0444,
6d456111 3631 .proc_handler = cdrom_sysctl_info,
1da177e4
LT		 3632 },
3633 {
1da177e4
LT		 3634 .procname = "autoclose",
3635 .data = &cdrom_sysctl_settings.autoclose,
3636 .maxlen = sizeof(int),
3637 .mode = 0644,
6d456111 3638 .proc_handler = cdrom_sysctl_handler,
1da177e4
LT		 3639 },
3640 {
1da177e4
LT		 3641 .procname = "autoeject",
3642 .data = &cdrom_sysctl_settings.autoeject,
3643 .maxlen = sizeof(int),
3644 .mode = 0644,
6d456111 3645 .proc_handler = cdrom_sysctl_handler,
1da177e4
LT		 3646 },
3647 {
1da177e4
LT		 3648 .procname = "debug",
3649 .data = &cdrom_sysctl_settings.debug,
3650 .maxlen = sizeof(int),
3651 .mode = 0644,
6d456111 3652 .proc_handler = cdrom_sysctl_handler,
1da177e4
LT		 3653 },
3654 {
1da177e4
LT		 3655 .procname = "lock",
3656 .data = &cdrom_sysctl_settings.lock,
3657 .maxlen = sizeof(int),
3658 .mode = 0644,
6d456111 3659 .proc_handler = cdrom_sysctl_handler,
1da177e4
LT		 3660 },
3661 {
1da177e4
LT		 3662 .procname = "check_media",
3663 .data = &cdrom_sysctl_settings.check,
3664 .maxlen = sizeof(int),
3665 .mode = 0644,
6d456111 3666 .proc_handler = cdrom_sysctl_handler
1da177e4 3667 },
894d2491 3668 { }
1da177e4
LT		 3669};
3670
90a3b89e 3671static struct ctl_table cdrom_cdrom_table[] = {
1da177e4 3672 {
1da177e4
LT		 3673 .procname = "cdrom",
3674 .maxlen = 0,
3675 .mode = 0555,
3676 .child = cdrom_table,
3677 },
894d2491 3678 { }
1da177e4
LT		 3679};
3680
3681/* Make sure that /proc/sys/dev is there */
90a3b89e 3682static struct ctl_table cdrom_root_table[] = {
1da177e4 3683 {
1da177e4
LT		 3684 .procname = "dev",
3685 .maxlen = 0,
3686 .mode = 0555,
3687 .child = cdrom_cdrom_table,
3688 },
894d2491 3689 { }
1da177e4
LT		 3690};
3691static struct ctl_table_header *cdrom_sysctl_header;
3692
3693static void cdrom_sysctl_register(void)
3694{
3695 static int initialized;
3696
3697 if (initialized == 1)
3698 return;
3699
0b4d4147 3700 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
1da177e4
LT		 3701
3702 /* set the defaults */
3703 cdrom_sysctl_settings.autoclose = autoclose;
3704 cdrom_sysctl_settings.autoeject = autoeject;
3705 cdrom_sysctl_settings.debug = debug;
3706 cdrom_sysctl_settings.lock = lockdoor;
3707 cdrom_sysctl_settings.check = check_media_type;
3708
3709 initialized = 1;
3710}
3711
3712static void cdrom_sysctl_unregister(void)
3713{
3714 if (cdrom_sysctl_header)
3715 unregister_sysctl_table(cdrom_sysctl_header);
3716}
3717
17672cf0
AM		 3718#else /* CONFIG_SYSCTL */
3719
3720static void cdrom_sysctl_register(void)
3721{
3722}
3723
3724static void cdrom_sysctl_unregister(void)
3725{
3726}
3727
1da177e4
LT		 3728#endif /* CONFIG_SYSCTL */
3729
3730static int __init cdrom_init(void)
3731{
1da177e4 3732 cdrom_sysctl_register();
17672cf0 3733
1da177e4
LT		 3734 return 0;
3735}
3736
3737static void __exit cdrom_exit(void)
3738{
e597cd09 3739 pr_info("Uniform CD-ROM driver unloaded\n");
1da177e4 3740 cdrom_sysctl_unregister();
1da177e4
LT		 3741}
3742
3743module_init(cdrom_init);
3744module_exit(cdrom_exit);
3745MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)