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1 | /* |
2 | * linux/drivers/ide/ide-cd.c | |
3 | * | |
4 | * Copyright (C) 1994, 1995, 1996 scott snyder <snyder@fnald0.fnal.gov> | |
5 | * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org> | |
6 | * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de> | |
7 | * | |
8 | * May be copied or modified under the terms of the GNU General Public | |
9 | * License. See linux/COPYING for more information. | |
10 | * | |
11 | * ATAPI CD-ROM driver. To be used with ide.c. | |
12 | * See Documentation/cdrom/ide-cd for usage information. | |
13 | * | |
14 | * Suggestions are welcome. Patches that work are more welcome though. ;-) | |
15 | * For those wishing to work on this driver, please be sure you download | |
16 | * and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI | |
17 | * (SFF-8020i rev 2.6) standards. These documents can be obtained by | |
18 | * anonymous ftp from: | |
19 | * ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps | |
20 | * ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf | |
21 | * | |
22 | * Drives that deviate from these standards will be accommodated as much | |
23 | * as possible via compile time or command-line options. Since I only have | |
24 | * a few drives, you generally need to send me patches... | |
25 | * | |
26 | * ---------------------------------- | |
27 | * TO DO LIST: | |
28 | * -Make it so that Pioneer CD DR-A24X and friends don't get screwed up on | |
29 | * boot | |
30 | * | |
31 | * ---------------------------------- | |
32 | * 1.00 Oct 31, 1994 -- Initial version. | |
33 | * 1.01 Nov 2, 1994 -- Fixed problem with starting request in | |
34 | * cdrom_check_status. | |
35 | * 1.03 Nov 25, 1994 -- leaving unmask_intr[] as a user-setting (as for disks) | |
36 | * (from mlord) -- minor changes to cdrom_setup() | |
37 | * -- renamed ide_dev_s to ide_drive_t, enable irq on command | |
38 | * 2.00 Nov 27, 1994 -- Generalize packet command interface; | |
39 | * add audio ioctls. | |
40 | * 2.01 Dec 3, 1994 -- Rework packet command interface to handle devices | |
41 | * which send an interrupt when ready for a command. | |
42 | * 2.02 Dec 11, 1994 -- Cache the TOC in the driver. | |
43 | * Don't use SCMD_PLAYAUDIO_TI; it's not included | |
44 | * in the current version of ATAPI. | |
45 | * Try to use LBA instead of track or MSF addressing | |
46 | * when possible. | |
47 | * Don't wait for READY_STAT. | |
48 | * 2.03 Jan 10, 1995 -- Rewrite block read routines to handle block sizes | |
49 | * other than 2k and to move multiple sectors in a | |
50 | * single transaction. | |
51 | * 2.04 Apr 21, 1995 -- Add work-around for Creative Labs CD220E drives. | |
52 | * Thanks to Nick Saw <cwsaw@pts7.pts.mot.com> for | |
53 | * help in figuring this out. Ditto for Acer and | |
54 | * Aztech drives, which seem to have the same problem. | |
55 | * 2.04b May 30, 1995 -- Fix to match changes in ide.c version 3.16 -ml | |
56 | * 2.05 Jun 8, 1995 -- Don't attempt to retry after an illegal request | |
57 | * or data protect error. | |
58 | * Use HWIF and DEV_HWIF macros as in ide.c. | |
59 | * Always try to do a request_sense after | |
60 | * a failed command. | |
61 | * Include an option to give textual descriptions | |
62 | * of ATAPI errors. | |
63 | * Fix a bug in handling the sector cache which | |
64 | * showed up if the drive returned data in 512 byte | |
65 | * blocks (like Pioneer drives). Thanks to | |
66 | * Richard Hirst <srh@gpt.co.uk> for diagnosing this. | |
67 | * Properly supply the page number field in the | |
68 | * MODE_SELECT command. | |
69 | * PLAYAUDIO12 is broken on the Aztech; work around it. | |
70 | * 2.05x Aug 11, 1995 -- lots of data structure renaming/restructuring in ide.c | |
71 | * (my apologies to Scott, but now ide-cd.c is independent) | |
72 | * 3.00 Aug 22, 1995 -- Implement CDROMMULTISESSION ioctl. | |
73 | * Implement CDROMREADAUDIO ioctl (UNTESTED). | |
74 | * Use input_ide_data() and output_ide_data(). | |
75 | * Add door locking. | |
76 | * Fix usage count leak in cdrom_open, which happened | |
77 | * when a read-write mount was attempted. | |
78 | * Try to load the disk on open. | |
79 | * Implement CDROMEJECT_SW ioctl (off by default). | |
80 | * Read total cdrom capacity during open. | |
81 | * Rearrange logic in cdrom_decode_status. Issue | |
82 | * request sense commands for failed packet commands | |
83 | * from here instead of from cdrom_queue_packet_command. | |
84 | * Fix a race condition in retrieving error information. | |
85 | * Suppress printing normal unit attention errors and | |
86 | * some drive not ready errors. | |
87 | * Implement CDROMVOLREAD ioctl. | |
88 | * Implement CDROMREADMODE1/2 ioctls. | |
89 | * Fix race condition in setting up interrupt handlers | |
90 | * when the `serialize' option is used. | |
91 | * 3.01 Sep 2, 1995 -- Fix ordering of reenabling interrupts in | |
92 | * cdrom_queue_request. | |
93 | * Another try at using ide_[input,output]_data. | |
94 | * 3.02 Sep 16, 1995 -- Stick total disk capacity in partition table as well. | |
95 | * Make VERBOSE_IDE_CD_ERRORS dump failed command again. | |
96 | * Dump out more information for ILLEGAL REQUEST errs. | |
97 | * Fix handling of errors occurring before the | |
98 | * packet command is transferred. | |
99 | * Fix transfers with odd bytelengths. | |
100 | * 3.03 Oct 27, 1995 -- Some Creative drives have an id of just `CD'. | |
101 | * `DCI-2S10' drives are broken too. | |
102 | * 3.04 Nov 20, 1995 -- So are Vertos drives. | |
103 | * 3.05 Dec 1, 1995 -- Changes to go with overhaul of ide.c and ide-tape.c | |
104 | * 3.06 Dec 16, 1995 -- Add support needed for partitions. | |
105 | * More workarounds for Vertos bugs (based on patches | |
106 | * from Holger Dietze <dietze@aix520.informatik.uni-leipzig.de>). | |
107 | * Try to eliminate byteorder assumptions. | |
108 | * Use atapi_cdrom_subchnl struct definition. | |
109 | * Add STANDARD_ATAPI compilation option. | |
110 | * 3.07 Jan 29, 1996 -- More twiddling for broken drives: Sony 55D, | |
111 | * Vertos 300. | |
112 | * Add NO_DOOR_LOCKING configuration option. | |
113 | * Handle drive_cmd requests w/NULL args (for hdparm -t). | |
114 | * Work around sporadic Sony55e audio play problem. | |
115 | * 3.07a Feb 11, 1996 -- check drive->id for NULL before dereferencing, to fix | |
116 | * problem with "hde=cdrom" with no drive present. -ml | |
117 | * 3.08 Mar 6, 1996 -- More Vertos workarounds. | |
118 | * 3.09 Apr 5, 1996 -- Add CDROMCLOSETRAY ioctl. | |
119 | * Switch to using MSF addressing for audio commands. | |
120 | * Reformat to match kernel tabbing style. | |
121 | * Add CDROM_GET_UPC ioctl. | |
122 | * 3.10 Apr 10, 1996 -- Fix compilation error with STANDARD_ATAPI. | |
123 | * 3.11 Apr 29, 1996 -- Patch from Heiko Eissfeldt <heiko@colossus.escape.de> | |
124 | * to remove redundant verify_area calls. | |
125 | * 3.12 May 7, 1996 -- Rudimentary changer support. Based on patches | |
126 | * from Gerhard Zuber <zuber@berlin.snafu.de>. | |
127 | * Let open succeed even if there's no loaded disc. | |
128 | * 3.13 May 19, 1996 -- Fixes for changer code. | |
129 | * 3.14 May 29, 1996 -- Add work-around for Vertos 600. | |
130 | * (From Hennus Bergman <hennus@sky.ow.nl>.) | |
131 | * 3.15 July 2, 1996 -- Added support for Sanyo 3 CD changers | |
132 | * from Ben Galliart <bgallia@luc.edu> with | |
133 | * special help from Jeff Lightfoot | |
134 | * <jeffml@pobox.com> | |
135 | * 3.15a July 9, 1996 -- Improved Sanyo 3 CD changer identification | |
136 | * 3.16 Jul 28, 1996 -- Fix from Gadi to reduce kernel stack usage for ioctl. | |
137 | * 3.17 Sep 17, 1996 -- Tweak audio reads for some drives. | |
138 | * Start changing CDROMLOADFROMSLOT to CDROM_SELECT_DISC. | |
139 | * 3.18 Oct 31, 1996 -- Added module and DMA support. | |
140 | * | |
141 | * | |
142 | * 4.00 Nov 5, 1996 -- New ide-cd maintainer, | |
143 | * Erik B. Andersen <andersee@debian.org> | |
144 | * -- Newer Creative drives don't always set the error | |
145 | * register correctly. Make sure we see media changes | |
146 | * regardless. | |
147 | * -- Integrate with generic cdrom driver. | |
148 | * -- CDROMGETSPINDOWN and CDROMSETSPINDOWN ioctls, based on | |
149 | * a patch from Ciro Cattuto <>. | |
150 | * -- Call set_device_ro. | |
151 | * -- Implement CDROMMECHANISMSTATUS and CDROMSLOTTABLE | |
152 | * ioctls, based on patch by Erik Andersen | |
153 | * -- Add some probes of drive capability during setup. | |
154 | * | |
155 | * 4.01 Nov 11, 1996 -- Split into ide-cd.c and ide-cd.h | |
156 | * -- Removed CDROMMECHANISMSTATUS and CDROMSLOTTABLE | |
157 | * ioctls in favor of a generalized approach | |
158 | * using the generic cdrom driver. | |
159 | * -- Fully integrated with the 2.1.X kernel. | |
160 | * -- Other stuff that I forgot (lots of changes) | |
161 | * | |
162 | * 4.02 Dec 01, 1996 -- Applied patch from Gadi Oxman <gadio@netvision.net.il> | |
163 | * to fix the drive door locking problems. | |
164 | * | |
165 | * 4.03 Dec 04, 1996 -- Added DSC overlap support. | |
166 | * 4.04 Dec 29, 1996 -- Added CDROMREADRAW ioclt based on patch | |
167 | * by Ales Makarov (xmakarov@sun.felk.cvut.cz) | |
168 | * | |
169 | * 4.05 Nov 20, 1997 -- Modified to print more drive info on init | |
170 | * Minor other changes | |
171 | * Fix errors on CDROMSTOP (If you have a "Dolphin", | |
172 | * you must define IHAVEADOLPHIN) | |
173 | * Added identifier so new Sanyo CD-changer works | |
174 | * Better detection if door locking isn't supported | |
175 | * | |
176 | * 4.06 Dec 17, 1997 -- fixed endless "tray open" messages -ml | |
177 | * 4.07 Dec 17, 1997 -- fallback to set pc->stat on "tray open" | |
178 | * 4.08 Dec 18, 1997 -- spew less noise when tray is empty | |
179 | * -- fix speed display for ACER 24X, 18X | |
180 | * 4.09 Jan 04, 1998 -- fix handling of the last block so we return | |
181 | * an end of file instead of an I/O error (Gadi) | |
182 | * 4.10 Jan 24, 1998 -- fixed a bug so now changers can change to a new | |
183 | * slot when there is no disc in the current slot. | |
184 | * -- Fixed a memory leak where info->changer_info was | |
185 | * malloc'ed but never free'd when closing the device. | |
186 | * -- Cleaned up the global namespace a bit by making more | |
187 | * functions static that should already have been. | |
188 | * 4.11 Mar 12, 1998 -- Added support for the CDROM_SELECT_SPEED ioctl | |
189 | * based on a patch for 2.0.33 by Jelle Foks | |
190 | * <jelle@scintilla.utwente.nl>, a patch for 2.0.33 | |
191 | * by Toni Giorgino <toni@pcape2.pi.infn.it>, the SCSI | |
192 | * version, and my own efforts. -erik | |
193 | * -- Fixed a stupid bug which egcs was kind enough to | |
194 | * inform me of where "Illegal mode for this track" | |
195 | * was never returned due to a comparison on data | |
196 | * types of limited range. | |
197 | * 4.12 Mar 29, 1998 -- Fixed bug in CDROM_SELECT_SPEED so write speed is | |
198 | * now set ionly for CD-R and CD-RW drives. I had | |
199 | * removed this support because it produced errors. | |
200 | * It produced errors _only_ for non-writers. duh. | |
201 | * 4.13 May 05, 1998 -- Suppress useless "in progress of becoming ready" | |
202 | * messages, since this is not an error. | |
203 | * -- Change error messages to be const | |
204 | * -- Remove a "\t" which looks ugly in the syslogs | |
205 | * 4.14 July 17, 1998 -- Change to pointing to .ps version of ATAPI spec | |
206 | * since the .pdf version doesn't seem to work... | |
207 | * -- Updated the TODO list to something more current. | |
208 | * | |
209 | * 4.15 Aug 25, 1998 -- Updated ide-cd.h to respect mechine endianess, | |
210 | * patch thanks to "Eddie C. Dost" <ecd@skynet.be> | |
211 | * | |
212 | * 4.50 Oct 19, 1998 -- New maintainers! | |
213 | * Jens Axboe <axboe@image.dk> | |
214 | * Chris Zwilling <chris@cloudnet.com> | |
215 | * | |
216 | * 4.51 Dec 23, 1998 -- Jens Axboe <axboe@image.dk> | |
217 | * - ide_cdrom_reset enabled since the ide subsystem | |
218 | * handles resets fine now. <axboe@image.dk> | |
219 | * - Transfer size fix for Samsung CD-ROMs, thanks to | |
220 | * "Ville Hallik" <ville.hallik@mail.ee>. | |
221 | * - other minor stuff. | |
222 | * | |
223 | * 4.52 Jan 19, 1999 -- Jens Axboe <axboe@image.dk> | |
224 | * - Detect DVD-ROM/RAM drives | |
225 | * | |
226 | * 4.53 Feb 22, 1999 - Include other model Samsung and one Goldstar | |
227 | * drive in transfer size limit. | |
228 | * - Fix the I/O error when doing eject without a medium | |
229 | * loaded on some drives. | |
230 | * - CDROMREADMODE2 is now implemented through | |
231 | * CDROMREADRAW, since many drives don't support | |
232 | * MODE2 (even though ATAPI 2.6 says they must). | |
233 | * - Added ignore parameter to ide-cd (as a module), eg | |
234 | * insmod ide-cd ignore='hda hdb' | |
235 | * Useful when using ide-cd in conjunction with | |
236 | * ide-scsi. TODO: non-modular way of doing the | |
237 | * same. | |
238 | * | |
239 | * 4.54 Aug 5, 1999 - Support for MMC2 class commands through the generic | |
240 | * packet interface to cdrom.c. | |
241 | * - Unified audio ioctl support, most of it. | |
242 | * - cleaned up various deprecated verify_area(). | |
243 | * - Added ide_cdrom_packet() as the interface for | |
244 | * the Uniform generic_packet(). | |
245 | * - bunch of other stuff, will fill in logs later. | |
246 | * - report 1 slot for non-changers, like the other | |
247 | * cd-rom drivers. don't report select disc for | |
248 | * non-changers as well. | |
249 | * - mask out audio playing, if the device can't do it. | |
250 | * | |
251 | * 4.55 Sep 1, 1999 - Eliminated the rest of the audio ioctls, except | |
252 | * for CDROMREADTOC[ENTRY|HEADER]. Some of the drivers | |
253 | * use this independently of the actual audio handling. | |
254 | * They will disappear later when I get the time to | |
255 | * do it cleanly. | |
256 | * - Minimize the TOC reading - only do it when we | |
257 | * know a media change has occurred. | |
258 | * - Moved all the CDROMREADx ioctls to the Uniform layer. | |
259 | * - Heiko Eissfeldt <heiko@colossus.escape.de> supplied | |
260 | * some fixes for CDI. | |
261 | * - CD-ROM leaving door locked fix from Andries | |
262 | * Brouwer <Andries.Brouwer@cwi.nl> | |
263 | * - Erik Andersen <andersen@xmission.com> unified | |
264 | * commands across the various drivers and how | |
265 | * sense errors are handled. | |
266 | * | |
267 | * 4.56 Sep 12, 1999 - Removed changer support - it is now in the | |
268 | * Uniform layer. | |
269 | * - Added partition based multisession handling. | |
270 | * - Mode sense and mode select moved to the | |
271 | * Uniform layer. | |
272 | * - Fixed a problem with WPI CDS-32X drive - it | |
273 | * failed the capabilities | |
274 | * | |
275 | * 4.57 Apr 7, 2000 - Fixed sense reporting. | |
276 | * - Fixed possible oops in ide_cdrom_get_last_session() | |
277 | * - Fix locking mania and make ide_cdrom_reset relock | |
278 | * - Stop spewing errors to log when magicdev polls with | |
279 | * TEST_UNIT_READY on some drives. | |
280 | * - Various fixes from Tobias Ringstrom: | |
281 | * tray if it was locked prior to the reset. | |
282 | * - cdrom_read_capacity returns one frame too little. | |
283 | * - Fix real capacity reporting. | |
284 | * | |
285 | * 4.58 May 1, 2000 - Clean up ACER50 stuff. | |
286 | * - Fix small problem with ide_cdrom_capacity | |
287 | * | |
288 | * 4.59 Aug 11, 2000 - Fix changer problem in cdrom_read_toc, we weren't | |
289 | * correctly sensing a disc change. | |
290 | * - Rearranged some code | |
291 | * - Use extended sense on drives that support it for | |
292 | * correctly reporting tray status -- from | |
293 | * Michael D Johnson <johnsom@orst.edu> | |
294 | * 4.60 Dec 17, 2003 - Add mt rainier support | |
295 | * - Bump timeout for packet commands, matches sr | |
296 | * - Odd stuff | |
297 | * 4.61 Jan 22, 2004 - support hardware sector sizes other than 2kB, | |
298 | * Pascal Schmidt <der.eremit@email.de> | |
299 | * | |
300 | *************************************************************************/ | |
301 | ||
302 | #define IDECD_VERSION "4.61" | |
303 | ||
304 | #include <linux/config.h> | |
305 | #include <linux/module.h> | |
306 | #include <linux/types.h> | |
307 | #include <linux/kernel.h> | |
308 | #include <linux/delay.h> | |
309 | #include <linux/timer.h> | |
310 | #include <linux/slab.h> | |
311 | #include <linux/interrupt.h> | |
312 | #include <linux/errno.h> | |
313 | #include <linux/cdrom.h> | |
314 | #include <linux/ide.h> | |
315 | #include <linux/completion.h> | |
316 | ||
317 | #include <scsi/scsi.h> /* For SCSI -> ATAPI command conversion */ | |
318 | ||
319 | #include <asm/irq.h> | |
320 | #include <asm/io.h> | |
321 | #include <asm/byteorder.h> | |
322 | #include <asm/uaccess.h> | |
323 | #include <asm/unaligned.h> | |
324 | ||
325 | #include "ide-cd.h" | |
326 | ||
327 | static DECLARE_MUTEX(idecd_ref_sem); | |
328 | ||
329 | #define to_ide_cd(obj) container_of(obj, struct cdrom_info, kref) | |
330 | ||
331 | #define ide_cd_g(disk) \ | |
332 | container_of((disk)->private_data, struct cdrom_info, driver) | |
333 | ||
334 | static struct cdrom_info *ide_cd_get(struct gendisk *disk) | |
335 | { | |
336 | struct cdrom_info *cd = NULL; | |
337 | ||
338 | down(&idecd_ref_sem); | |
339 | cd = ide_cd_g(disk); | |
340 | if (cd) | |
341 | kref_get(&cd->kref); | |
342 | up(&idecd_ref_sem); | |
343 | return cd; | |
344 | } | |
345 | ||
346 | static void ide_cd_release(struct kref *); | |
347 | ||
348 | static void ide_cd_put(struct cdrom_info *cd) | |
349 | { | |
350 | down(&idecd_ref_sem); | |
351 | kref_put(&cd->kref, ide_cd_release); | |
352 | up(&idecd_ref_sem); | |
353 | } | |
354 | ||
355 | /**************************************************************************** | |
356 | * Generic packet command support and error handling routines. | |
357 | */ | |
358 | ||
359 | /* Mark that we've seen a media change, and invalidate our internal | |
360 | buffers. */ | |
361 | static void cdrom_saw_media_change (ide_drive_t *drive) | |
362 | { | |
363 | struct cdrom_info *info = drive->driver_data; | |
364 | ||
365 | CDROM_STATE_FLAGS (drive)->media_changed = 1; | |
366 | CDROM_STATE_FLAGS (drive)->toc_valid = 0; | |
367 | info->nsectors_buffered = 0; | |
368 | } | |
369 | ||
370 | static int cdrom_log_sense(ide_drive_t *drive, struct request *rq, | |
371 | struct request_sense *sense) | |
372 | { | |
373 | int log = 0; | |
374 | ||
375 | if (!sense || !rq || (rq->flags & REQ_QUIET)) | |
376 | return 0; | |
377 | ||
378 | switch (sense->sense_key) { | |
379 | case NO_SENSE: case RECOVERED_ERROR: | |
380 | break; | |
381 | case NOT_READY: | |
382 | /* | |
383 | * don't care about tray state messages for | |
384 | * e.g. capacity commands or in-progress or | |
385 | * becoming ready | |
386 | */ | |
387 | if (sense->asc == 0x3a || sense->asc == 0x04) | |
388 | break; | |
389 | log = 1; | |
390 | break; | |
391 | case ILLEGAL_REQUEST: | |
392 | /* | |
393 | * don't log START_STOP unit with LoEj set, since | |
394 | * we cannot reliably check if drive can auto-close | |
395 | */ | |
396 | if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24) | |
397 | log = 0; | |
398 | break; | |
399 | case UNIT_ATTENTION: | |
400 | /* | |
401 | * Make good and sure we've seen this potential media | |
402 | * change. Some drives (i.e. Creative) fail to present | |
403 | * the correct sense key in the error register. | |
404 | */ | |
405 | cdrom_saw_media_change(drive); | |
406 | break; | |
407 | default: | |
408 | log = 1; | |
409 | break; | |
410 | } | |
411 | return log; | |
412 | } | |
413 | ||
414 | static | |
415 | void cdrom_analyze_sense_data(ide_drive_t *drive, | |
416 | struct request *failed_command, | |
417 | struct request_sense *sense) | |
418 | { | |
419 | if (!cdrom_log_sense(drive, failed_command, sense)) | |
420 | return; | |
421 | ||
422 | /* | |
423 | * If a read toc is executed for a CD-R or CD-RW medium where | |
424 | * the first toc has not been recorded yet, it will fail with | |
425 | * 05/24/00 (which is a confusing error) | |
426 | */ | |
427 | if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP) | |
428 | if (sense->sense_key == 0x05 && sense->asc == 0x24) | |
429 | return; | |
430 | ||
431 | #if VERBOSE_IDE_CD_ERRORS | |
432 | { | |
433 | int i; | |
434 | const char *s; | |
435 | char buf[80]; | |
436 | ||
437 | printk ("ATAPI device %s:\n", drive->name); | |
438 | if (sense->error_code==0x70) | |
439 | printk(" Error: "); | |
440 | else if (sense->error_code==0x71) | |
441 | printk(" Deferred Error: "); | |
442 | else if (sense->error_code == 0x7f) | |
443 | printk(" Vendor-specific Error: "); | |
444 | else | |
445 | printk(" Unknown Error Type: "); | |
446 | ||
447 | if (sense->sense_key < ARY_LEN(sense_key_texts)) | |
448 | s = sense_key_texts[sense->sense_key]; | |
449 | else | |
450 | s = "bad sense key!"; | |
451 | ||
452 | printk("%s -- (Sense key=0x%02x)\n", s, sense->sense_key); | |
453 | ||
454 | if (sense->asc == 0x40) { | |
455 | sprintf(buf, "Diagnostic failure on component 0x%02x", | |
456 | sense->ascq); | |
457 | s = buf; | |
458 | } else { | |
459 | int lo = 0, mid, hi = ARY_LEN(sense_data_texts); | |
460 | unsigned long key = (sense->sense_key << 16); | |
461 | key |= (sense->asc << 8); | |
462 | if (!(sense->ascq >= 0x80 && sense->ascq <= 0xdd)) | |
463 | key |= sense->ascq; | |
464 | s = NULL; | |
465 | ||
466 | while (hi > lo) { | |
467 | mid = (lo + hi) / 2; | |
468 | if (sense_data_texts[mid].asc_ascq == key || | |
469 | sense_data_texts[mid].asc_ascq == (0xff0000|key)) { | |
470 | s = sense_data_texts[mid].text; | |
471 | break; | |
472 | } | |
473 | else if (sense_data_texts[mid].asc_ascq > key) | |
474 | hi = mid; | |
475 | else | |
476 | lo = mid+1; | |
477 | } | |
478 | } | |
479 | ||
480 | if (s == NULL) { | |
481 | if (sense->asc > 0x80) | |
482 | s = "(vendor-specific error)"; | |
483 | else | |
484 | s = "(reserved error code)"; | |
485 | } | |
486 | ||
487 | printk(KERN_ERR " %s -- (asc=0x%02x, ascq=0x%02x)\n", | |
488 | s, sense->asc, sense->ascq); | |
489 | ||
490 | if (failed_command != NULL) { | |
491 | ||
492 | int lo=0, mid, hi= ARY_LEN (packet_command_texts); | |
493 | s = NULL; | |
494 | ||
495 | while (hi > lo) { | |
496 | mid = (lo + hi) / 2; | |
497 | if (packet_command_texts[mid].packet_command == | |
498 | failed_command->cmd[0]) { | |
499 | s = packet_command_texts[mid].text; | |
500 | break; | |
501 | } | |
502 | if (packet_command_texts[mid].packet_command > | |
503 | failed_command->cmd[0]) | |
504 | hi = mid; | |
505 | else | |
506 | lo = mid+1; | |
507 | } | |
508 | ||
509 | printk (KERN_ERR " The failed \"%s\" packet command was: \n \"", s); | |
510 | for (i=0; i<sizeof (failed_command->cmd); i++) | |
511 | printk ("%02x ", failed_command->cmd[i]); | |
512 | printk ("\"\n"); | |
513 | } | |
514 | ||
515 | /* The SKSV bit specifies validity of the sense_key_specific | |
516 | * in the next two commands. It is bit 7 of the first byte. | |
517 | * In the case of NOT_READY, if SKSV is set the drive can | |
518 | * give us nice ETA readings. | |
519 | */ | |
520 | if (sense->sense_key == NOT_READY && (sense->sks[0] & 0x80)) { | |
521 | int progress = (sense->sks[1] << 8 | sense->sks[2]) * 100; | |
522 | printk(KERN_ERR " Command is %02d%% complete\n", progress / 0xffff); | |
523 | ||
524 | } | |
525 | ||
526 | if (sense->sense_key == ILLEGAL_REQUEST && | |
527 | (sense->sks[0] & 0x80) != 0) { | |
528 | printk(KERN_ERR " Error in %s byte %d", | |
529 | (sense->sks[0] & 0x40) != 0 ? | |
530 | "command packet" : "command data", | |
531 | (sense->sks[1] << 8) + sense->sks[2]); | |
532 | ||
533 | if ((sense->sks[0] & 0x40) != 0) | |
534 | printk (" bit %d", sense->sks[0] & 0x07); | |
535 | ||
536 | printk ("\n"); | |
537 | } | |
538 | } | |
539 | ||
540 | #else /* not VERBOSE_IDE_CD_ERRORS */ | |
541 | ||
542 | /* Suppress printing unit attention and `in progress of becoming ready' | |
543 | errors when we're not being verbose. */ | |
544 | ||
545 | if (sense->sense_key == UNIT_ATTENTION || | |
546 | (sense->sense_key == NOT_READY && (sense->asc == 4 || | |
547 | sense->asc == 0x3a))) | |
548 | return; | |
549 | ||
550 | printk(KERN_ERR "%s: error code: 0x%02x sense_key: 0x%02x asc: 0x%02x ascq: 0x%02x\n", | |
551 | drive->name, | |
552 | sense->error_code, sense->sense_key, | |
553 | sense->asc, sense->ascq); | |
554 | #endif /* not VERBOSE_IDE_CD_ERRORS */ | |
555 | } | |
556 | ||
557 | /* | |
558 | * Initialize a ide-cd packet command request | |
559 | */ | |
560 | static void cdrom_prepare_request(ide_drive_t *drive, struct request *rq) | |
561 | { | |
562 | struct cdrom_info *cd = drive->driver_data; | |
563 | ||
564 | ide_init_drive_cmd(rq); | |
565 | rq->flags = REQ_PC; | |
566 | rq->rq_disk = cd->disk; | |
567 | } | |
568 | ||
569 | static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense, | |
570 | struct request *failed_command) | |
571 | { | |
572 | struct cdrom_info *info = drive->driver_data; | |
573 | struct request *rq = &info->request_sense_request; | |
574 | ||
575 | if (sense == NULL) | |
576 | sense = &info->sense_data; | |
577 | ||
578 | /* stuff the sense request in front of our current request */ | |
579 | cdrom_prepare_request(drive, rq); | |
580 | ||
581 | rq->data = sense; | |
582 | rq->cmd[0] = GPCMD_REQUEST_SENSE; | |
583 | rq->cmd[4] = rq->data_len = 18; | |
584 | ||
585 | rq->flags = REQ_SENSE; | |
586 | ||
587 | /* NOTE! Save the failed command in "rq->buffer" */ | |
588 | rq->buffer = (void *) failed_command; | |
589 | ||
590 | (void) ide_do_drive_cmd(drive, rq, ide_preempt); | |
591 | } | |
592 | ||
593 | static void cdrom_end_request (ide_drive_t *drive, int uptodate) | |
594 | { | |
595 | struct request *rq = HWGROUP(drive)->rq; | |
596 | int nsectors = rq->hard_cur_sectors; | |
597 | ||
598 | if ((rq->flags & REQ_SENSE) && uptodate) { | |
599 | /* | |
600 | * For REQ_SENSE, "rq->buffer" points to the original failed | |
601 | * request | |
602 | */ | |
603 | struct request *failed = (struct request *) rq->buffer; | |
604 | struct cdrom_info *info = drive->driver_data; | |
605 | void *sense = &info->sense_data; | |
606 | unsigned long flags; | |
607 | ||
608 | if (failed) { | |
609 | if (failed->sense) { | |
610 | sense = failed->sense; | |
611 | failed->sense_len = rq->sense_len; | |
612 | } | |
613 | ||
614 | /* | |
615 | * now end failed request | |
616 | */ | |
617 | spin_lock_irqsave(&ide_lock, flags); | |
618 | end_that_request_chunk(failed, 0, failed->data_len); | |
619 | end_that_request_last(failed); | |
620 | spin_unlock_irqrestore(&ide_lock, flags); | |
621 | } | |
622 | ||
623 | cdrom_analyze_sense_data(drive, failed, sense); | |
624 | } | |
625 | ||
626 | if (!rq->current_nr_sectors && blk_fs_request(rq)) | |
627 | uptodate = 1; | |
628 | /* make sure it's fully ended */ | |
629 | if (blk_pc_request(rq)) | |
630 | nsectors = (rq->data_len + 511) >> 9; | |
631 | if (!nsectors) | |
632 | nsectors = 1; | |
633 | ||
634 | ide_end_request(drive, uptodate, nsectors); | |
635 | } | |
636 | ||
637 | /* Returns 0 if the request should be continued. | |
638 | Returns 1 if the request was ended. */ | |
639 | static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret) | |
640 | { | |
641 | struct request *rq = HWGROUP(drive)->rq; | |
642 | int stat, err, sense_key; | |
643 | ||
644 | /* Check for errors. */ | |
645 | stat = HWIF(drive)->INB(IDE_STATUS_REG); | |
646 | if (stat_ret) | |
647 | *stat_ret = stat; | |
648 | ||
649 | if (OK_STAT(stat, good_stat, BAD_R_STAT)) | |
650 | return 0; | |
651 | ||
652 | /* Get the IDE error register. */ | |
653 | err = HWIF(drive)->INB(IDE_ERROR_REG); | |
654 | sense_key = err >> 4; | |
655 | ||
656 | if (rq == NULL) { | |
657 | printk("%s: missing rq in cdrom_decode_status\n", drive->name); | |
658 | return 1; | |
659 | } | |
660 | ||
661 | if (rq->flags & REQ_SENSE) { | |
662 | /* We got an error trying to get sense info | |
663 | from the drive (probably while trying | |
664 | to recover from a former error). Just give up. */ | |
665 | ||
666 | rq->flags |= REQ_FAILED; | |
667 | cdrom_end_request(drive, 0); | |
668 | ide_error(drive, "request sense failure", stat); | |
669 | return 1; | |
670 | ||
671 | } else if (rq->flags & (REQ_PC | REQ_BLOCK_PC)) { | |
672 | /* All other functions, except for READ. */ | |
673 | unsigned long flags; | |
674 | ||
675 | /* | |
676 | * if we have an error, pass back CHECK_CONDITION as the | |
677 | * scsi status byte | |
678 | */ | |
679 | if ((rq->flags & REQ_BLOCK_PC) && !rq->errors) | |
680 | rq->errors = SAM_STAT_CHECK_CONDITION; | |
681 | ||
682 | /* Check for tray open. */ | |
683 | if (sense_key == NOT_READY) { | |
684 | cdrom_saw_media_change (drive); | |
685 | } else if (sense_key == UNIT_ATTENTION) { | |
686 | /* Check for media change. */ | |
687 | cdrom_saw_media_change (drive); | |
688 | /*printk("%s: media changed\n",drive->name);*/ | |
689 | return 0; | |
690 | } else if (!(rq->flags & REQ_QUIET)) { | |
691 | /* Otherwise, print an error. */ | |
692 | ide_dump_status(drive, "packet command error", stat); | |
693 | } | |
694 | ||
695 | rq->flags |= REQ_FAILED; | |
696 | ||
697 | /* | |
698 | * instead of playing games with moving completions around, | |
699 | * remove failed request completely and end it when the | |
700 | * request sense has completed | |
701 | */ | |
702 | if (stat & ERR_STAT) { | |
703 | spin_lock_irqsave(&ide_lock, flags); | |
704 | blkdev_dequeue_request(rq); | |
705 | HWGROUP(drive)->rq = NULL; | |
706 | spin_unlock_irqrestore(&ide_lock, flags); | |
707 | ||
708 | cdrom_queue_request_sense(drive, rq->sense, rq); | |
709 | } else | |
710 | cdrom_end_request(drive, 0); | |
711 | ||
712 | } else if (blk_fs_request(rq)) { | |
713 | int do_end_request = 0; | |
714 | ||
715 | /* Handle errors from READ and WRITE requests. */ | |
716 | ||
717 | if (blk_noretry_request(rq)) | |
718 | do_end_request = 1; | |
719 | ||
720 | if (sense_key == NOT_READY) { | |
721 | /* Tray open. */ | |
722 | if (rq_data_dir(rq) == READ) { | |
723 | cdrom_saw_media_change (drive); | |
724 | ||
725 | /* Fail the request. */ | |
726 | printk ("%s: tray open\n", drive->name); | |
727 | do_end_request = 1; | |
728 | } else { | |
729 | struct cdrom_info *info = drive->driver_data; | |
730 | ||
731 | /* allow the drive 5 seconds to recover, some | |
732 | * devices will return this error while flushing | |
733 | * data from cache */ | |
734 | if (!rq->errors) | |
735 | info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY; | |
736 | rq->errors = 1; | |
737 | if (time_after(jiffies, info->write_timeout)) | |
738 | do_end_request = 1; | |
739 | else { | |
740 | unsigned long flags; | |
741 | ||
742 | /* | |
743 | * take a breather relying on the | |
744 | * unplug timer to kick us again | |
745 | */ | |
746 | spin_lock_irqsave(&ide_lock, flags); | |
747 | blk_plug_device(drive->queue); | |
748 | spin_unlock_irqrestore(&ide_lock,flags); | |
749 | return 1; | |
750 | } | |
751 | } | |
752 | } else if (sense_key == UNIT_ATTENTION) { | |
753 | /* Media change. */ | |
754 | cdrom_saw_media_change (drive); | |
755 | ||
756 | /* Arrange to retry the request. | |
757 | But be sure to give up if we've retried | |
758 | too many times. */ | |
759 | if (++rq->errors > ERROR_MAX) | |
760 | do_end_request = 1; | |
761 | } else if (sense_key == ILLEGAL_REQUEST || | |
762 | sense_key == DATA_PROTECT) { | |
763 | /* No point in retrying after an illegal | |
764 | request or data protect error.*/ | |
765 | ide_dump_status (drive, "command error", stat); | |
766 | do_end_request = 1; | |
767 | } else if (sense_key == MEDIUM_ERROR) { | |
768 | /* No point in re-trying a zillion times on a bad | |
769 | * sector... If we got here the error is not correctable */ | |
770 | ide_dump_status (drive, "media error (bad sector)", stat); | |
771 | do_end_request = 1; | |
772 | } else if (sense_key == BLANK_CHECK) { | |
773 | /* Disk appears blank ?? */ | |
774 | ide_dump_status (drive, "media error (blank)", stat); | |
775 | do_end_request = 1; | |
776 | } else if ((err & ~ABRT_ERR) != 0) { | |
777 | /* Go to the default handler | |
778 | for other errors. */ | |
779 | ide_error(drive, "cdrom_decode_status", stat); | |
780 | return 1; | |
781 | } else if ((++rq->errors > ERROR_MAX)) { | |
782 | /* We've racked up too many retries. Abort. */ | |
783 | do_end_request = 1; | |
784 | } | |
785 | ||
786 | if (do_end_request) | |
787 | cdrom_end_request(drive, 0); | |
788 | ||
789 | /* If we got a CHECK_CONDITION status, | |
790 | queue a request sense command. */ | |
791 | if ((stat & ERR_STAT) != 0) | |
792 | cdrom_queue_request_sense(drive, NULL, NULL); | |
793 | } else { | |
794 | blk_dump_rq_flags(rq, "ide-cd: bad rq"); | |
795 | cdrom_end_request(drive, 0); | |
796 | } | |
797 | ||
798 | /* Retry, or handle the next request. */ | |
799 | return 1; | |
800 | } | |
801 | ||
802 | static int cdrom_timer_expiry(ide_drive_t *drive) | |
803 | { | |
804 | struct request *rq = HWGROUP(drive)->rq; | |
805 | unsigned long wait = 0; | |
806 | ||
807 | /* | |
808 | * Some commands are *slow* and normally take a long time to | |
809 | * complete. Usually we can use the ATAPI "disconnect" to bypass | |
810 | * this, but not all commands/drives support that. Let | |
811 | * ide_timer_expiry keep polling us for these. | |
812 | */ | |
813 | switch (rq->cmd[0]) { | |
814 | case GPCMD_BLANK: | |
815 | case GPCMD_FORMAT_UNIT: | |
816 | case GPCMD_RESERVE_RZONE_TRACK: | |
817 | case GPCMD_CLOSE_TRACK: | |
818 | case GPCMD_FLUSH_CACHE: | |
819 | wait = ATAPI_WAIT_PC; | |
820 | break; | |
821 | default: | |
822 | if (!(rq->flags & REQ_QUIET)) | |
823 | printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n", rq->cmd[0]); | |
824 | wait = 0; | |
825 | break; | |
826 | } | |
827 | return wait; | |
828 | } | |
829 | ||
830 | /* Set up the device registers for transferring a packet command on DEV, | |
831 | expecting to later transfer XFERLEN bytes. HANDLER is the routine | |
832 | which actually transfers the command to the drive. If this is a | |
833 | drq_interrupt device, this routine will arrange for HANDLER to be | |
834 | called when the interrupt from the drive arrives. Otherwise, HANDLER | |
835 | will be called immediately after the drive is prepared for the transfer. */ | |
836 | ||
837 | static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive, | |
838 | int xferlen, | |
839 | ide_handler_t *handler) | |
840 | { | |
841 | ide_startstop_t startstop; | |
842 | struct cdrom_info *info = drive->driver_data; | |
843 | ide_hwif_t *hwif = drive->hwif; | |
844 | ||
845 | /* Wait for the controller to be idle. */ | |
846 | if (ide_wait_stat(&startstop, drive, 0, BUSY_STAT, WAIT_READY)) | |
847 | return startstop; | |
848 | ||
849 | if (info->dma) | |
850 | info->dma = !hwif->dma_setup(drive); | |
851 | ||
852 | /* Set up the controller registers. */ | |
853 | /* FIXME: for Virtual DMA we must check harder */ | |
854 | HWIF(drive)->OUTB(info->dma, IDE_FEATURE_REG); | |
855 | HWIF(drive)->OUTB(0, IDE_IREASON_REG); | |
856 | HWIF(drive)->OUTB(0, IDE_SECTOR_REG); | |
857 | ||
858 | HWIF(drive)->OUTB(xferlen & 0xff, IDE_BCOUNTL_REG); | |
859 | HWIF(drive)->OUTB(xferlen >> 8 , IDE_BCOUNTH_REG); | |
860 | if (IDE_CONTROL_REG) | |
861 | HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG); | |
862 | ||
863 | if (CDROM_CONFIG_FLAGS (drive)->drq_interrupt) { | |
864 | /* packet command */ | |
865 | ide_execute_command(drive, WIN_PACKETCMD, handler, ATAPI_WAIT_PC, cdrom_timer_expiry); | |
866 | return ide_started; | |
867 | } else { | |
868 | unsigned long flags; | |
869 | ||
870 | /* packet command */ | |
871 | spin_lock_irqsave(&ide_lock, flags); | |
872 | hwif->OUTBSYNC(drive, WIN_PACKETCMD, IDE_COMMAND_REG); | |
873 | ndelay(400); | |
874 | spin_unlock_irqrestore(&ide_lock, flags); | |
875 | ||
876 | return (*handler) (drive); | |
877 | } | |
878 | } | |
879 | ||
880 | /* Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. | |
881 | The device registers must have already been prepared | |
882 | by cdrom_start_packet_command. | |
883 | HANDLER is the interrupt handler to call when the command completes | |
884 | or there's data ready. */ | |
885 | /* | |
886 | * changed 5 parameters to 3 for dvd-ram | |
887 | * struct packet_command *pc; now packet_command_t *pc; | |
888 | */ | |
889 | #define ATAPI_MIN_CDB_BYTES 12 | |
890 | static ide_startstop_t cdrom_transfer_packet_command (ide_drive_t *drive, | |
891 | struct request *rq, | |
892 | ide_handler_t *handler) | |
893 | { | |
894 | ide_hwif_t *hwif = drive->hwif; | |
895 | int cmd_len; | |
896 | struct cdrom_info *info = drive->driver_data; | |
897 | ide_startstop_t startstop; | |
898 | ||
899 | if (CDROM_CONFIG_FLAGS(drive)->drq_interrupt) { | |
900 | /* Here we should have been called after receiving an interrupt | |
901 | from the device. DRQ should how be set. */ | |
902 | ||
903 | /* Check for errors. */ | |
904 | if (cdrom_decode_status(drive, DRQ_STAT, NULL)) | |
905 | return ide_stopped; | |
906 | } else { | |
907 | /* Otherwise, we must wait for DRQ to get set. */ | |
908 | if (ide_wait_stat(&startstop, drive, DRQ_STAT, | |
909 | BUSY_STAT, WAIT_READY)) | |
910 | return startstop; | |
911 | } | |
912 | ||
913 | /* Arm the interrupt handler. */ | |
914 | ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry); | |
915 | ||
916 | /* ATAPI commands get padded out to 12 bytes minimum */ | |
917 | cmd_len = COMMAND_SIZE(rq->cmd[0]); | |
918 | if (cmd_len < ATAPI_MIN_CDB_BYTES) | |
919 | cmd_len = ATAPI_MIN_CDB_BYTES; | |
920 | ||
921 | /* Send the command to the device. */ | |
922 | HWIF(drive)->atapi_output_bytes(drive, rq->cmd, cmd_len); | |
923 | ||
924 | /* Start the DMA if need be */ | |
925 | if (info->dma) | |
926 | hwif->dma_start(drive); | |
927 | ||
928 | return ide_started; | |
929 | } | |
930 | ||
931 | /**************************************************************************** | |
932 | * Block read functions. | |
933 | */ | |
934 | ||
935 | /* | |
936 | * Buffer up to SECTORS_TO_TRANSFER sectors from the drive in our sector | |
937 | * buffer. Once the first sector is added, any subsequent sectors are | |
938 | * assumed to be continuous (until the buffer is cleared). For the first | |
939 | * sector added, SECTOR is its sector number. (SECTOR is then ignored until | |
940 | * the buffer is cleared.) | |
941 | */ | |
942 | static void cdrom_buffer_sectors (ide_drive_t *drive, unsigned long sector, | |
943 | int sectors_to_transfer) | |
944 | { | |
945 | struct cdrom_info *info = drive->driver_data; | |
946 | ||
947 | /* Number of sectors to read into the buffer. */ | |
948 | int sectors_to_buffer = min_t(int, sectors_to_transfer, | |
949 | (SECTOR_BUFFER_SIZE >> SECTOR_BITS) - | |
950 | info->nsectors_buffered); | |
951 | ||
952 | char *dest; | |
953 | ||
954 | /* If we couldn't get a buffer, don't try to buffer anything... */ | |
955 | if (info->buffer == NULL) | |
956 | sectors_to_buffer = 0; | |
957 | ||
958 | /* If this is the first sector in the buffer, remember its number. */ | |
959 | if (info->nsectors_buffered == 0) | |
960 | info->sector_buffered = sector; | |
961 | ||
962 | /* Read the data into the buffer. */ | |
963 | dest = info->buffer + info->nsectors_buffered * SECTOR_SIZE; | |
964 | while (sectors_to_buffer > 0) { | |
965 | HWIF(drive)->atapi_input_bytes(drive, dest, SECTOR_SIZE); | |
966 | --sectors_to_buffer; | |
967 | --sectors_to_transfer; | |
968 | ++info->nsectors_buffered; | |
969 | dest += SECTOR_SIZE; | |
970 | } | |
971 | ||
972 | /* Throw away any remaining data. */ | |
973 | while (sectors_to_transfer > 0) { | |
974 | static char dum[SECTOR_SIZE]; | |
975 | HWIF(drive)->atapi_input_bytes(drive, dum, sizeof (dum)); | |
976 | --sectors_to_transfer; | |
977 | } | |
978 | } | |
979 | ||
980 | /* | |
981 | * Check the contents of the interrupt reason register from the cdrom | |
982 | * and attempt to recover if there are problems. Returns 0 if everything's | |
983 | * ok; nonzero if the request has been terminated. | |
984 | */ | |
985 | static inline | |
986 | int cdrom_read_check_ireason (ide_drive_t *drive, int len, int ireason) | |
987 | { | |
988 | if (ireason == 2) | |
989 | return 0; | |
990 | else if (ireason == 0) { | |
991 | /* Whoops... The drive is expecting to receive data from us! */ | |
992 | printk(KERN_ERR "%s: read_intr: Drive wants to transfer data the " | |
993 | "wrong way!\n", drive->name); | |
994 | ||
995 | /* Throw some data at the drive so it doesn't hang | |
996 | and quit this request. */ | |
997 | while (len > 0) { | |
998 | int dum = 0; | |
999 | HWIF(drive)->atapi_output_bytes(drive, &dum, sizeof (dum)); | |
1000 | len -= sizeof (dum); | |
1001 | } | |
1002 | } else if (ireason == 1) { | |
1003 | /* Some drives (ASUS) seem to tell us that status | |
1004 | * info is available. just get it and ignore. | |
1005 | */ | |
1006 | (void) HWIF(drive)->INB(IDE_STATUS_REG); | |
1007 | return 0; | |
1008 | } else { | |
1009 | /* Drive wants a command packet, or invalid ireason... */ | |
1010 | printk(KERN_ERR "%s: read_intr: bad interrupt reason %x\n", drive->name, | |
1011 | ireason); | |
1012 | } | |
1013 | ||
1014 | cdrom_end_request(drive, 0); | |
1015 | return -1; | |
1016 | } | |
1017 | ||
1018 | /* | |
1019 | * Interrupt routine. Called when a read request has completed. | |
1020 | */ | |
1021 | static ide_startstop_t cdrom_read_intr (ide_drive_t *drive) | |
1022 | { | |
1023 | int stat; | |
1024 | int ireason, len, sectors_to_transfer, nskip; | |
1025 | struct cdrom_info *info = drive->driver_data; | |
1026 | u8 lowcyl = 0, highcyl = 0; | |
1027 | int dma = info->dma, dma_error = 0; | |
1028 | ||
1029 | struct request *rq = HWGROUP(drive)->rq; | |
1030 | ||
1031 | /* | |
1032 | * handle dma case | |
1033 | */ | |
1034 | if (dma) { | |
1035 | info->dma = 0; | |
1036 | if ((dma_error = HWIF(drive)->ide_dma_end(drive))) | |
1037 | __ide_dma_off(drive); | |
1038 | } | |
1039 | ||
1040 | if (cdrom_decode_status(drive, 0, &stat)) | |
1041 | return ide_stopped; | |
1042 | ||
1043 | if (dma) { | |
1044 | if (!dma_error) { | |
1045 | ide_end_request(drive, 1, rq->nr_sectors); | |
1046 | return ide_stopped; | |
1047 | } else | |
1048 | return ide_error(drive, "dma error", stat); | |
1049 | } | |
1050 | ||
1051 | /* Read the interrupt reason and the transfer length. */ | |
1052 | ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3; | |
1053 | lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG); | |
1054 | highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG); | |
1055 | ||
1056 | len = lowcyl + (256 * highcyl); | |
1057 | ||
1058 | /* If DRQ is clear, the command has completed. */ | |
1059 | if ((stat & DRQ_STAT) == 0) { | |
1060 | /* If we're not done filling the current buffer, complain. | |
1061 | Otherwise, complete the command normally. */ | |
1062 | if (rq->current_nr_sectors > 0) { | |
1063 | printk (KERN_ERR "%s: cdrom_read_intr: data underrun (%d blocks)\n", | |
1064 | drive->name, rq->current_nr_sectors); | |
1065 | rq->flags |= REQ_FAILED; | |
1066 | cdrom_end_request(drive, 0); | |
1067 | } else | |
1068 | cdrom_end_request(drive, 1); | |
1069 | return ide_stopped; | |
1070 | } | |
1071 | ||
1072 | /* Check that the drive is expecting to do the same thing we are. */ | |
1073 | if (cdrom_read_check_ireason (drive, len, ireason)) | |
1074 | return ide_stopped; | |
1075 | ||
1076 | /* Assume that the drive will always provide data in multiples | |
1077 | of at least SECTOR_SIZE, as it gets hairy to keep track | |
1078 | of the transfers otherwise. */ | |
1079 | if ((len % SECTOR_SIZE) != 0) { | |
1080 | printk (KERN_ERR "%s: cdrom_read_intr: Bad transfer size %d\n", | |
1081 | drive->name, len); | |
1082 | if (CDROM_CONFIG_FLAGS(drive)->limit_nframes) | |
1083 | printk (KERN_ERR " This drive is not supported by this version of the driver\n"); | |
1084 | else { | |
1085 | printk (KERN_ERR " Trying to limit transfer sizes\n"); | |
1086 | CDROM_CONFIG_FLAGS(drive)->limit_nframes = 1; | |
1087 | } | |
1088 | cdrom_end_request(drive, 0); | |
1089 | return ide_stopped; | |
1090 | } | |
1091 | ||
1092 | /* The number of sectors we need to read from the drive. */ | |
1093 | sectors_to_transfer = len / SECTOR_SIZE; | |
1094 | ||
1095 | /* First, figure out if we need to bit-bucket | |
1096 | any of the leading sectors. */ | |
1097 | nskip = min_t(int, rq->current_nr_sectors - bio_cur_sectors(rq->bio), sectors_to_transfer); | |
1098 | ||
1099 | while (nskip > 0) { | |
1100 | /* We need to throw away a sector. */ | |
1101 | static char dum[SECTOR_SIZE]; | |
1102 | HWIF(drive)->atapi_input_bytes(drive, dum, sizeof (dum)); | |
1103 | ||
1104 | --rq->current_nr_sectors; | |
1105 | --nskip; | |
1106 | --sectors_to_transfer; | |
1107 | } | |
1108 | ||
1109 | /* Now loop while we still have data to read from the drive. */ | |
1110 | while (sectors_to_transfer > 0) { | |
1111 | int this_transfer; | |
1112 | ||
1113 | /* If we've filled the present buffer but there's another | |
1114 | chained buffer after it, move on. */ | |
1115 | if (rq->current_nr_sectors == 0 && rq->nr_sectors) | |
1116 | cdrom_end_request(drive, 1); | |
1117 | ||
1118 | /* If the buffers are full, cache the rest of the data in our | |
1119 | internal buffer. */ | |
1120 | if (rq->current_nr_sectors == 0) { | |
1121 | cdrom_buffer_sectors(drive, rq->sector, sectors_to_transfer); | |
1122 | sectors_to_transfer = 0; | |
1123 | } else { | |
1124 | /* Transfer data to the buffers. | |
1125 | Figure out how many sectors we can transfer | |
1126 | to the current buffer. */ | |
1127 | this_transfer = min_t(int, sectors_to_transfer, | |
1128 | rq->current_nr_sectors); | |
1129 | ||
1130 | /* Read this_transfer sectors | |
1131 | into the current buffer. */ | |
1132 | while (this_transfer > 0) { | |
1133 | HWIF(drive)->atapi_input_bytes(drive, rq->buffer, SECTOR_SIZE); | |
1134 | rq->buffer += SECTOR_SIZE; | |
1135 | --rq->nr_sectors; | |
1136 | --rq->current_nr_sectors; | |
1137 | ++rq->sector; | |
1138 | --this_transfer; | |
1139 | --sectors_to_transfer; | |
1140 | } | |
1141 | } | |
1142 | } | |
1143 | ||
1144 | /* Done moving data! Wait for another interrupt. */ | |
1145 | ide_set_handler(drive, &cdrom_read_intr, ATAPI_WAIT_PC, NULL); | |
1146 | return ide_started; | |
1147 | } | |
1148 | ||
1149 | /* | |
1150 | * Try to satisfy some of the current read request from our cached data. | |
1151 | * Returns nonzero if the request has been completed, zero otherwise. | |
1152 | */ | |
1153 | static int cdrom_read_from_buffer (ide_drive_t *drive) | |
1154 | { | |
1155 | struct cdrom_info *info = drive->driver_data; | |
1156 | struct request *rq = HWGROUP(drive)->rq; | |
1157 | unsigned short sectors_per_frame; | |
1158 | ||
1159 | sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS; | |
1160 | ||
1161 | /* Can't do anything if there's no buffer. */ | |
1162 | if (info->buffer == NULL) return 0; | |
1163 | ||
1164 | /* Loop while this request needs data and the next block is present | |
1165 | in our cache. */ | |
1166 | while (rq->nr_sectors > 0 && | |
1167 | rq->sector >= info->sector_buffered && | |
1168 | rq->sector < info->sector_buffered + info->nsectors_buffered) { | |
1169 | if (rq->current_nr_sectors == 0) | |
1170 | cdrom_end_request(drive, 1); | |
1171 | ||
1172 | memcpy (rq->buffer, | |
1173 | info->buffer + | |
1174 | (rq->sector - info->sector_buffered) * SECTOR_SIZE, | |
1175 | SECTOR_SIZE); | |
1176 | rq->buffer += SECTOR_SIZE; | |
1177 | --rq->current_nr_sectors; | |
1178 | --rq->nr_sectors; | |
1179 | ++rq->sector; | |
1180 | } | |
1181 | ||
1182 | /* If we've satisfied the current request, | |
1183 | terminate it successfully. */ | |
1184 | if (rq->nr_sectors == 0) { | |
1185 | cdrom_end_request(drive, 1); | |
1186 | return -1; | |
1187 | } | |
1188 | ||
1189 | /* Move on to the next buffer if needed. */ | |
1190 | if (rq->current_nr_sectors == 0) | |
1191 | cdrom_end_request(drive, 1); | |
1192 | ||
1193 | /* If this condition does not hold, then the kluge i use to | |
1194 | represent the number of sectors to skip at the start of a transfer | |
1195 | will fail. I think that this will never happen, but let's be | |
1196 | paranoid and check. */ | |
1197 | if (rq->current_nr_sectors < bio_cur_sectors(rq->bio) && | |
1198 | (rq->sector & (sectors_per_frame - 1))) { | |
1199 | printk(KERN_ERR "%s: cdrom_read_from_buffer: buffer botch (%ld)\n", | |
1200 | drive->name, (long)rq->sector); | |
1201 | cdrom_end_request(drive, 0); | |
1202 | return -1; | |
1203 | } | |
1204 | ||
1205 | return 0; | |
1206 | } | |
1207 | ||
1208 | /* | |
1209 | * Routine to send a read packet command to the drive. | |
1210 | * This is usually called directly from cdrom_start_read. | |
1211 | * However, for drq_interrupt devices, it is called from an interrupt | |
1212 | * when the drive is ready to accept the command. | |
1213 | */ | |
1214 | static ide_startstop_t cdrom_start_read_continuation (ide_drive_t *drive) | |
1215 | { | |
1216 | struct request *rq = HWGROUP(drive)->rq; | |
1217 | unsigned short sectors_per_frame; | |
1218 | int nskip; | |
1219 | ||
1220 | sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS; | |
1221 | ||
1222 | /* If the requested sector doesn't start on a cdrom block boundary, | |
1223 | we must adjust the start of the transfer so that it does, | |
1224 | and remember to skip the first few sectors. | |
1225 | If the CURRENT_NR_SECTORS field is larger than the size | |
1226 | of the buffer, it will mean that we're to skip a number | |
1227 | of sectors equal to the amount by which CURRENT_NR_SECTORS | |
1228 | is larger than the buffer size. */ | |
1229 | nskip = rq->sector & (sectors_per_frame - 1); | |
1230 | if (nskip > 0) { | |
1231 | /* Sanity check... */ | |
1232 | if (rq->current_nr_sectors != bio_cur_sectors(rq->bio) && | |
1233 | (rq->sector & (sectors_per_frame - 1))) { | |
1234 | printk(KERN_ERR "%s: cdrom_start_read_continuation: buffer botch (%u)\n", | |
1235 | drive->name, rq->current_nr_sectors); | |
1236 | cdrom_end_request(drive, 0); | |
1237 | return ide_stopped; | |
1238 | } | |
1239 | rq->current_nr_sectors += nskip; | |
1240 | } | |
1241 | ||
1242 | /* Set up the command */ | |
1243 | rq->timeout = ATAPI_WAIT_PC; | |
1244 | ||
1245 | /* Send the command to the drive and return. */ | |
1246 | return cdrom_transfer_packet_command(drive, rq, &cdrom_read_intr); | |
1247 | } | |
1248 | ||
1249 | ||
1250 | #define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */ | |
1251 | #define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */ | |
1252 | #define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */ | |
1253 | ||
1254 | static ide_startstop_t cdrom_seek_intr (ide_drive_t *drive) | |
1255 | { | |
1256 | struct cdrom_info *info = drive->driver_data; | |
1257 | int stat; | |
1258 | static int retry = 10; | |
1259 | ||
1260 | if (cdrom_decode_status(drive, 0, &stat)) | |
1261 | return ide_stopped; | |
1262 | CDROM_CONFIG_FLAGS(drive)->seeking = 1; | |
1263 | ||
1264 | if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) { | |
1265 | if (--retry == 0) { | |
1266 | /* | |
1267 | * this condition is far too common, to bother | |
1268 | * users about it | |
1269 | */ | |
1270 | /* printk("%s: disabled DSC seek overlap\n", drive->name);*/ | |
1271 | drive->dsc_overlap = 0; | |
1272 | } | |
1273 | } | |
1274 | return ide_stopped; | |
1275 | } | |
1276 | ||
1277 | static ide_startstop_t cdrom_start_seek_continuation (ide_drive_t *drive) | |
1278 | { | |
1279 | struct request *rq = HWGROUP(drive)->rq; | |
1280 | sector_t frame = rq->sector; | |
1281 | ||
1282 | sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS); | |
1283 | ||
1284 | memset(rq->cmd, 0, sizeof(rq->cmd)); | |
1285 | rq->cmd[0] = GPCMD_SEEK; | |
1286 | put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]); | |
1287 | ||
1288 | rq->timeout = ATAPI_WAIT_PC; | |
1289 | return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr); | |
1290 | } | |
1291 | ||
1292 | static ide_startstop_t cdrom_start_seek (ide_drive_t *drive, unsigned int block) | |
1293 | { | |
1294 | struct cdrom_info *info = drive->driver_data; | |
1295 | ||
1296 | info->dma = 0; | |
1297 | info->cmd = 0; | |
1298 | info->start_seek = jiffies; | |
1299 | return cdrom_start_packet_command(drive, 0, cdrom_start_seek_continuation); | |
1300 | } | |
1301 | ||
1302 | /* Fix up a possibly partially-processed request so that we can | |
1303 | start it over entirely, or even put it back on the request queue. */ | |
1304 | static void restore_request (struct request *rq) | |
1305 | { | |
1306 | if (rq->buffer != bio_data(rq->bio)) { | |
1307 | sector_t n = (rq->buffer - (char *) bio_data(rq->bio)) / SECTOR_SIZE; | |
1308 | ||
1309 | rq->buffer = bio_data(rq->bio); | |
1310 | rq->nr_sectors += n; | |
1311 | rq->sector -= n; | |
1312 | } | |
1313 | rq->hard_cur_sectors = rq->current_nr_sectors = bio_cur_sectors(rq->bio); | |
1314 | rq->hard_nr_sectors = rq->nr_sectors; | |
1315 | rq->hard_sector = rq->sector; | |
1316 | rq->q->prep_rq_fn(rq->q, rq); | |
1317 | } | |
1318 | ||
1319 | /* | |
1320 | * Start a read request from the CD-ROM. | |
1321 | */ | |
1322 | static ide_startstop_t cdrom_start_read (ide_drive_t *drive, unsigned int block) | |
1323 | { | |
1324 | struct cdrom_info *info = drive->driver_data; | |
1325 | struct request *rq = HWGROUP(drive)->rq; | |
1326 | unsigned short sectors_per_frame; | |
1327 | ||
1328 | sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS; | |
1329 | ||
1330 | /* We may be retrying this request after an error. Fix up | |
1331 | any weirdness which might be present in the request packet. */ | |
1332 | restore_request(rq); | |
1333 | ||
1334 | /* Satisfy whatever we can of this request from our cached sector. */ | |
1335 | if (cdrom_read_from_buffer(drive)) | |
1336 | return ide_stopped; | |
1337 | ||
1338 | blk_attempt_remerge(drive->queue, rq); | |
1339 | ||
1340 | /* Clear the local sector buffer. */ | |
1341 | info->nsectors_buffered = 0; | |
1342 | ||
1343 | /* use dma, if possible. */ | |
1344 | info->dma = drive->using_dma; | |
1345 | if ((rq->sector & (sectors_per_frame - 1)) || | |
1346 | (rq->nr_sectors & (sectors_per_frame - 1))) | |
1347 | info->dma = 0; | |
1348 | ||
1349 | info->cmd = READ; | |
1350 | ||
1351 | /* Start sending the read request to the drive. */ | |
1352 | return cdrom_start_packet_command(drive, 32768, cdrom_start_read_continuation); | |
1353 | } | |
1354 | ||
1355 | /**************************************************************************** | |
1356 | * Execute all other packet commands. | |
1357 | */ | |
1358 | ||
1359 | /* Interrupt routine for packet command completion. */ | |
1360 | static ide_startstop_t cdrom_pc_intr (ide_drive_t *drive) | |
1361 | { | |
1362 | int ireason, len, thislen; | |
1363 | struct request *rq = HWGROUP(drive)->rq; | |
1364 | u8 lowcyl = 0, highcyl = 0; | |
1365 | int stat; | |
1366 | ||
1367 | /* Check for errors. */ | |
1368 | if (cdrom_decode_status(drive, 0, &stat)) | |
1369 | return ide_stopped; | |
1370 | ||
1371 | /* Read the interrupt reason and the transfer length. */ | |
1372 | ireason = HWIF(drive)->INB(IDE_IREASON_REG); | |
1373 | lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG); | |
1374 | highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG); | |
1375 | ||
1376 | len = lowcyl + (256 * highcyl); | |
1377 | ||
1378 | /* If DRQ is clear, the command has completed. | |
1379 | Complain if we still have data left to transfer. */ | |
1380 | if ((stat & DRQ_STAT) == 0) { | |
1381 | /* Some of the trailing request sense fields are optional, and | |
1382 | some drives don't send them. Sigh. */ | |
1383 | if (rq->cmd[0] == GPCMD_REQUEST_SENSE && | |
1384 | rq->data_len > 0 && | |
1385 | rq->data_len <= 5) { | |
1386 | while (rq->data_len > 0) { | |
1387 | *(unsigned char *)rq->data++ = 0; | |
1388 | --rq->data_len; | |
1389 | } | |
1390 | } | |
1391 | ||
1392 | if (rq->data_len == 0) | |
1393 | cdrom_end_request(drive, 1); | |
1394 | else { | |
1395 | /* Comment this out, because this always happens | |
1396 | right after a reset occurs, and it is annoying to | |
1397 | always print expected stuff. */ | |
1398 | /* | |
1399 | printk ("%s: cdrom_pc_intr: data underrun %d\n", | |
1400 | drive->name, pc->buflen); | |
1401 | */ | |
1402 | rq->flags |= REQ_FAILED; | |
1403 | cdrom_end_request(drive, 0); | |
1404 | } | |
1405 | return ide_stopped; | |
1406 | } | |
1407 | ||
1408 | /* Figure out how much data to transfer. */ | |
1409 | thislen = rq->data_len; | |
1410 | if (thislen > len) thislen = len; | |
1411 | ||
1412 | /* The drive wants to be written to. */ | |
1413 | if ((ireason & 3) == 0) { | |
1414 | if (!rq->data) { | |
1415 | blk_dump_rq_flags(rq, "cdrom_pc_intr, write"); | |
1416 | goto confused; | |
1417 | } | |
1418 | /* Transfer the data. */ | |
1419 | HWIF(drive)->atapi_output_bytes(drive, rq->data, thislen); | |
1420 | ||
1421 | /* If we haven't moved enough data to satisfy the drive, | |
1422 | add some padding. */ | |
1423 | while (len > thislen) { | |
1424 | int dum = 0; | |
1425 | HWIF(drive)->atapi_output_bytes(drive, &dum, sizeof(dum)); | |
1426 | len -= sizeof(dum); | |
1427 | } | |
1428 | ||
1429 | /* Keep count of how much data we've moved. */ | |
1430 | rq->data += thislen; | |
1431 | rq->data_len -= thislen; | |
1432 | } | |
1433 | ||
1434 | /* Same drill for reading. */ | |
1435 | else if ((ireason & 3) == 2) { | |
1436 | if (!rq->data) { | |
1437 | blk_dump_rq_flags(rq, "cdrom_pc_intr, write"); | |
1438 | goto confused; | |
1439 | } | |
1440 | /* Transfer the data. */ | |
1441 | HWIF(drive)->atapi_input_bytes(drive, rq->data, thislen); | |
1442 | ||
1443 | /* If we haven't moved enough data to satisfy the drive, | |
1444 | add some padding. */ | |
1445 | while (len > thislen) { | |
1446 | int dum = 0; | |
1447 | HWIF(drive)->atapi_input_bytes(drive, &dum, sizeof(dum)); | |
1448 | len -= sizeof(dum); | |
1449 | } | |
1450 | ||
1451 | /* Keep count of how much data we've moved. */ | |
1452 | rq->data += thislen; | |
1453 | rq->data_len -= thislen; | |
1454 | ||
1455 | if (rq->flags & REQ_SENSE) | |
1456 | rq->sense_len += thislen; | |
1457 | } else { | |
1458 | confused: | |
1459 | printk (KERN_ERR "%s: cdrom_pc_intr: The drive " | |
1460 | "appears confused (ireason = 0x%02x)\n", | |
1461 | drive->name, ireason); | |
1462 | rq->flags |= REQ_FAILED; | |
1463 | } | |
1464 | ||
1465 | /* Now we wait for another interrupt. */ | |
1466 | ide_set_handler(drive, &cdrom_pc_intr, ATAPI_WAIT_PC, cdrom_timer_expiry); | |
1467 | return ide_started; | |
1468 | } | |
1469 | ||
1470 | static ide_startstop_t cdrom_do_pc_continuation (ide_drive_t *drive) | |
1471 | { | |
1472 | struct request *rq = HWGROUP(drive)->rq; | |
1473 | ||
1474 | if (!rq->timeout) | |
1475 | rq->timeout = ATAPI_WAIT_PC; | |
1476 | ||
1477 | /* Send the command to the drive and return. */ | |
1478 | return cdrom_transfer_packet_command(drive, rq, &cdrom_pc_intr); | |
1479 | } | |
1480 | ||
1481 | ||
1482 | static ide_startstop_t cdrom_do_packet_command (ide_drive_t *drive) | |
1483 | { | |
1484 | int len; | |
1485 | struct request *rq = HWGROUP(drive)->rq; | |
1486 | struct cdrom_info *info = drive->driver_data; | |
1487 | ||
1488 | info->dma = 0; | |
1489 | info->cmd = 0; | |
1490 | rq->flags &= ~REQ_FAILED; | |
1491 | len = rq->data_len; | |
1492 | ||
1493 | /* Start sending the command to the drive. */ | |
1494 | return cdrom_start_packet_command(drive, len, cdrom_do_pc_continuation); | |
1495 | } | |
1496 | ||
1497 | ||
1498 | static | |
1499 | int cdrom_queue_packet_command(ide_drive_t *drive, struct request *rq) | |
1500 | { | |
1501 | struct request_sense sense; | |
1502 | int retries = 10; | |
1503 | unsigned int flags = rq->flags; | |
1504 | ||
1505 | if (rq->sense == NULL) | |
1506 | rq->sense = &sense; | |
1507 | ||
1508 | /* Start of retry loop. */ | |
1509 | do { | |
1510 | int error; | |
1511 | unsigned long time = jiffies; | |
1512 | rq->flags = flags; | |
1513 | ||
1514 | error = ide_do_drive_cmd(drive, rq, ide_wait); | |
1515 | time = jiffies - time; | |
1516 | ||
1517 | /* FIXME: we should probably abort/retry or something | |
1518 | * in case of failure */ | |
1519 | if (rq->flags & REQ_FAILED) { | |
1520 | /* The request failed. Retry if it was due to a unit | |
1521 | attention status | |
1522 | (usually means media was changed). */ | |
1523 | struct request_sense *reqbuf = rq->sense; | |
1524 | ||
1525 | if (reqbuf->sense_key == UNIT_ATTENTION) | |
1526 | cdrom_saw_media_change(drive); | |
1527 | else if (reqbuf->sense_key == NOT_READY && | |
1528 | reqbuf->asc == 4 && reqbuf->ascq != 4) { | |
1529 | /* The drive is in the process of loading | |
1530 | a disk. Retry, but wait a little to give | |
1531 | the drive time to complete the load. */ | |
1532 | ssleep(2); | |
1533 | } else { | |
1534 | /* Otherwise, don't retry. */ | |
1535 | retries = 0; | |
1536 | } | |
1537 | --retries; | |
1538 | } | |
1539 | ||
1540 | /* End of retry loop. */ | |
1541 | } while ((rq->flags & REQ_FAILED) && retries >= 0); | |
1542 | ||
1543 | /* Return an error if the command failed. */ | |
1544 | return (rq->flags & REQ_FAILED) ? -EIO : 0; | |
1545 | } | |
1546 | ||
1547 | /* | |
1548 | * Write handling | |
1549 | */ | |
1550 | static inline int cdrom_write_check_ireason(ide_drive_t *drive, int len, int ireason) | |
1551 | { | |
1552 | /* Two notes about IDE interrupt reason here - 0 means that | |
1553 | * the drive wants to receive data from us, 2 means that | |
1554 | * the drive is expecting to transfer data to us. | |
1555 | */ | |
1556 | if (ireason == 0) | |
1557 | return 0; | |
1558 | else if (ireason == 2) { | |
1559 | /* Whoops... The drive wants to send data. */ | |
1560 | printk(KERN_ERR "%s: write_intr: wrong transfer direction!\n", | |
1561 | drive->name); | |
1562 | ||
1563 | while (len > 0) { | |
1564 | int dum = 0; | |
1565 | HWIF(drive)->atapi_input_bytes(drive, &dum, sizeof(dum)); | |
1566 | len -= sizeof(dum); | |
1567 | } | |
1568 | } else { | |
1569 | /* Drive wants a command packet, or invalid ireason... */ | |
1570 | printk(KERN_ERR "%s: write_intr: bad interrupt reason %x\n", | |
1571 | drive->name, ireason); | |
1572 | } | |
1573 | ||
1574 | cdrom_end_request(drive, 0); | |
1575 | return 1; | |
1576 | } | |
1577 | ||
1578 | static void post_transform_command(struct request *req) | |
1579 | { | |
1580 | u8 *c = req->cmd; | |
1581 | char *ibuf; | |
1582 | ||
1583 | if (!blk_pc_request(req)) | |
1584 | return; | |
1585 | ||
1586 | if (req->bio) | |
1587 | ibuf = bio_data(req->bio); | |
1588 | else | |
1589 | ibuf = req->data; | |
1590 | ||
1591 | if (!ibuf) | |
1592 | return; | |
1593 | ||
1594 | /* | |
1595 | * set ansi-revision and response data as atapi | |
1596 | */ | |
1597 | if (c[0] == GPCMD_INQUIRY) { | |
1598 | ibuf[2] |= 2; | |
1599 | ibuf[3] = (ibuf[3] & 0xf0) | 2; | |
1600 | } | |
1601 | } | |
1602 | ||
1603 | typedef void (xfer_func_t)(ide_drive_t *, void *, u32); | |
1604 | ||
1605 | /* | |
1606 | * best way to deal with dma that is not sector aligned right now... note | |
1607 | * that in this path we are not using ->data or ->buffer at all. this irs | |
1608 | * can replace cdrom_pc_intr, cdrom_read_intr, and cdrom_write_intr in the | |
1609 | * future. | |
1610 | */ | |
1611 | static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) | |
1612 | { | |
1613 | struct cdrom_info *info = drive->driver_data; | |
1614 | struct request *rq = HWGROUP(drive)->rq; | |
1615 | int dma_error, dma, stat, ireason, len, thislen; | |
1616 | u8 lowcyl, highcyl; | |
1617 | xfer_func_t *xferfunc; | |
1618 | unsigned long flags; | |
1619 | ||
1620 | /* Check for errors. */ | |
1621 | dma_error = 0; | |
1622 | dma = info->dma; | |
1623 | if (dma) { | |
1624 | info->dma = 0; | |
1625 | dma_error = HWIF(drive)->ide_dma_end(drive); | |
1626 | } | |
1627 | ||
1628 | if (cdrom_decode_status(drive, 0, &stat)) | |
1629 | return ide_stopped; | |
1630 | ||
1631 | /* | |
1632 | * using dma, transfer is complete now | |
1633 | */ | |
1634 | if (dma) { | |
1635 | if (dma_error) { | |
1636 | printk(KERN_ERR "ide-cd: dma error\n"); | |
1637 | __ide_dma_off(drive); | |
1638 | return ide_error(drive, "dma error", stat); | |
1639 | } | |
1640 | ||
1641 | end_that_request_chunk(rq, 1, rq->data_len); | |
1642 | rq->data_len = 0; | |
1643 | goto end_request; | |
1644 | } | |
1645 | ||
1646 | /* | |
1647 | * ok we fall to pio :/ | |
1648 | */ | |
1649 | ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3; | |
1650 | lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG); | |
1651 | highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG); | |
1652 | ||
1653 | len = lowcyl + (256 * highcyl); | |
1654 | thislen = rq->data_len; | |
1655 | if (thislen > len) | |
1656 | thislen = len; | |
1657 | ||
1658 | /* | |
1659 | * If DRQ is clear, the command has completed. | |
1660 | */ | |
1661 | if ((stat & DRQ_STAT) == 0) | |
1662 | goto end_request; | |
1663 | ||
1664 | /* | |
1665 | * check which way to transfer data | |
1666 | */ | |
1667 | if (rq_data_dir(rq) == WRITE) { | |
1668 | /* | |
1669 | * write to drive | |
1670 | */ | |
1671 | if (cdrom_write_check_ireason(drive, len, ireason)) | |
1672 | return ide_stopped; | |
1673 | ||
1674 | xferfunc = HWIF(drive)->atapi_output_bytes; | |
1675 | } else { | |
1676 | /* | |
1677 | * read from drive | |
1678 | */ | |
1679 | if (cdrom_read_check_ireason(drive, len, ireason)) | |
1680 | return ide_stopped; | |
1681 | ||
1682 | xferfunc = HWIF(drive)->atapi_input_bytes; | |
1683 | } | |
1684 | ||
1685 | /* | |
1686 | * transfer data | |
1687 | */ | |
1688 | while (thislen > 0) { | |
1689 | int blen = blen = rq->data_len; | |
1690 | char *ptr = rq->data; | |
1691 | ||
1692 | /* | |
1693 | * bio backed? | |
1694 | */ | |
1695 | if (rq->bio) { | |
1696 | ptr = bio_data(rq->bio); | |
1697 | blen = bio_iovec(rq->bio)->bv_len; | |
1698 | } | |
1699 | ||
1700 | if (!ptr) { | |
1701 | printk(KERN_ERR "%s: confused, missing data\n", drive->name); | |
1702 | break; | |
1703 | } | |
1704 | ||
1705 | if (blen > thislen) | |
1706 | blen = thislen; | |
1707 | ||
1708 | xferfunc(drive, ptr, blen); | |
1709 | ||
1710 | thislen -= blen; | |
1711 | len -= blen; | |
1712 | rq->data_len -= blen; | |
1713 | ||
1714 | if (rq->bio) | |
1715 | end_that_request_chunk(rq, 1, blen); | |
1716 | else | |
1717 | rq->data += blen; | |
1718 | } | |
1719 | ||
1720 | /* | |
1721 | * pad, if necessary | |
1722 | */ | |
1723 | if (len > 0) { | |
1724 | while (len > 0) { | |
1725 | int pad = 0; | |
1726 | ||
1727 | xferfunc(drive, &pad, sizeof(pad)); | |
1728 | len -= sizeof(pad); | |
1729 | } | |
1730 | } | |
1731 | ||
1732 | if (HWGROUP(drive)->handler != NULL) | |
1733 | BUG(); | |
1734 | ||
1735 | ide_set_handler(drive, cdrom_newpc_intr, rq->timeout, NULL); | |
1736 | return ide_started; | |
1737 | ||
1738 | end_request: | |
1739 | if (!rq->data_len) | |
1740 | post_transform_command(rq); | |
1741 | ||
1742 | spin_lock_irqsave(&ide_lock, flags); | |
1743 | blkdev_dequeue_request(rq); | |
1744 | end_that_request_last(rq); | |
1745 | HWGROUP(drive)->rq = NULL; | |
1746 | spin_unlock_irqrestore(&ide_lock, flags); | |
1747 | return ide_stopped; | |
1748 | } | |
1749 | ||
1750 | static ide_startstop_t cdrom_write_intr(ide_drive_t *drive) | |
1751 | { | |
1752 | int stat, ireason, len, sectors_to_transfer, uptodate; | |
1753 | struct cdrom_info *info = drive->driver_data; | |
1754 | int dma_error = 0, dma = info->dma; | |
1755 | u8 lowcyl = 0, highcyl = 0; | |
1756 | ||
1757 | struct request *rq = HWGROUP(drive)->rq; | |
1758 | ||
1759 | /* Check for errors. */ | |
1760 | if (dma) { | |
1761 | info->dma = 0; | |
1762 | if ((dma_error = HWIF(drive)->ide_dma_end(drive))) { | |
1763 | printk(KERN_ERR "ide-cd: write dma error\n"); | |
1764 | __ide_dma_off(drive); | |
1765 | } | |
1766 | } | |
1767 | ||
1768 | if (cdrom_decode_status(drive, 0, &stat)) | |
1769 | return ide_stopped; | |
1770 | ||
1771 | /* | |
1772 | * using dma, transfer is complete now | |
1773 | */ | |
1774 | if (dma) { | |
1775 | if (dma_error) | |
1776 | return ide_error(drive, "dma error", stat); | |
1777 | ||
1778 | ide_end_request(drive, 1, rq->nr_sectors); | |
1779 | return ide_stopped; | |
1780 | } | |
1781 | ||
1782 | /* Read the interrupt reason and the transfer length. */ | |
1783 | ireason = HWIF(drive)->INB(IDE_IREASON_REG); | |
1784 | lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG); | |
1785 | highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG); | |
1786 | ||
1787 | len = lowcyl + (256 * highcyl); | |
1788 | ||
1789 | /* If DRQ is clear, the command has completed. */ | |
1790 | if ((stat & DRQ_STAT) == 0) { | |
1791 | /* If we're not done writing, complain. | |
1792 | * Otherwise, complete the command normally. | |
1793 | */ | |
1794 | uptodate = 1; | |
1795 | if (rq->current_nr_sectors > 0) { | |
1796 | printk(KERN_ERR "%s: write_intr: data underrun (%d blocks)\n", | |
1797 | drive->name, rq->current_nr_sectors); | |
1798 | uptodate = 0; | |
1799 | } | |
1800 | cdrom_end_request(drive, uptodate); | |
1801 | return ide_stopped; | |
1802 | } | |
1803 | ||
1804 | /* Check that the drive is expecting to do the same thing we are. */ | |
1805 | if (cdrom_write_check_ireason(drive, len, ireason)) | |
1806 | return ide_stopped; | |
1807 | ||
1808 | sectors_to_transfer = len / SECTOR_SIZE; | |
1809 | ||
1810 | /* | |
1811 | * now loop and write out the data | |
1812 | */ | |
1813 | while (sectors_to_transfer > 0) { | |
1814 | int this_transfer; | |
1815 | ||
1816 | if (!rq->current_nr_sectors) { | |
1817 | printk(KERN_ERR "ide-cd: write_intr: oops\n"); | |
1818 | break; | |
1819 | } | |
1820 | ||
1821 | /* | |
1822 | * Figure out how many sectors we can transfer | |
1823 | */ | |
1824 | this_transfer = min_t(int, sectors_to_transfer, rq->current_nr_sectors); | |
1825 | ||
1826 | while (this_transfer > 0) { | |
1827 | HWIF(drive)->atapi_output_bytes(drive, rq->buffer, SECTOR_SIZE); | |
1828 | rq->buffer += SECTOR_SIZE; | |
1829 | --rq->nr_sectors; | |
1830 | --rq->current_nr_sectors; | |
1831 | ++rq->sector; | |
1832 | --this_transfer; | |
1833 | --sectors_to_transfer; | |
1834 | } | |
1835 | ||
1836 | /* | |
1837 | * current buffer complete, move on | |
1838 | */ | |
1839 | if (rq->current_nr_sectors == 0 && rq->nr_sectors) | |
1840 | cdrom_end_request(drive, 1); | |
1841 | } | |
1842 | ||
1843 | /* re-arm handler */ | |
1844 | ide_set_handler(drive, &cdrom_write_intr, ATAPI_WAIT_PC, NULL); | |
1845 | return ide_started; | |
1846 | } | |
1847 | ||
1848 | static ide_startstop_t cdrom_start_write_cont(ide_drive_t *drive) | |
1849 | { | |
1850 | struct request *rq = HWGROUP(drive)->rq; | |
1851 | ||
1852 | #if 0 /* the immediate bit */ | |
1853 | rq->cmd[1] = 1 << 3; | |
1854 | #endif | |
1855 | rq->timeout = ATAPI_WAIT_PC; | |
1856 | ||
1857 | return cdrom_transfer_packet_command(drive, rq, cdrom_write_intr); | |
1858 | } | |
1859 | ||
1860 | static ide_startstop_t cdrom_start_write(ide_drive_t *drive, struct request *rq) | |
1861 | { | |
1862 | struct cdrom_info *info = drive->driver_data; | |
1863 | struct gendisk *g = info->disk; | |
1864 | unsigned short sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS; | |
1865 | ||
1866 | /* | |
1867 | * writes *must* be hardware frame aligned | |
1868 | */ | |
1869 | if ((rq->nr_sectors & (sectors_per_frame - 1)) || | |
1870 | (rq->sector & (sectors_per_frame - 1))) { | |
1871 | cdrom_end_request(drive, 0); | |
1872 | return ide_stopped; | |
1873 | } | |
1874 | ||
1875 | /* | |
1876 | * disk has become write protected | |
1877 | */ | |
1878 | if (g->policy) { | |
1879 | cdrom_end_request(drive, 0); | |
1880 | return ide_stopped; | |
1881 | } | |
1882 | ||
1883 | /* | |
1884 | * for dvd-ram and such media, it's a really big deal to get | |
1885 | * big writes all the time. so scour the queue and attempt to | |
1886 | * remerge requests, often the plugging will not have had time | |
1887 | * to do this properly | |
1888 | */ | |
1889 | blk_attempt_remerge(drive->queue, rq); | |
1890 | ||
1891 | info->nsectors_buffered = 0; | |
1892 | ||
1893 | /* use dma, if possible. we don't need to check more, since we | |
1894 | * know that the transfer is always (at least!) frame aligned */ | |
1895 | info->dma = drive->using_dma ? 1 : 0; | |
1896 | info->cmd = WRITE; | |
1897 | ||
1898 | info->devinfo.media_written = 1; | |
1899 | ||
1900 | /* Start sending the write request to the drive. */ | |
1901 | return cdrom_start_packet_command(drive, 32768, cdrom_start_write_cont); | |
1902 | } | |
1903 | ||
1904 | static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive) | |
1905 | { | |
1906 | struct request *rq = HWGROUP(drive)->rq; | |
1907 | ||
1908 | if (!rq->timeout) | |
1909 | rq->timeout = ATAPI_WAIT_PC; | |
1910 | ||
1911 | return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr); | |
1912 | } | |
1913 | ||
1914 | static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) | |
1915 | { | |
1916 | struct cdrom_info *info = drive->driver_data; | |
1917 | ||
1918 | rq->flags |= REQ_QUIET; | |
1919 | ||
1920 | info->dma = 0; | |
1921 | info->cmd = 0; | |
1922 | ||
1923 | /* | |
1924 | * sg request | |
1925 | */ | |
1926 | if (rq->bio) { | |
1927 | int mask = drive->queue->dma_alignment; | |
1928 | unsigned long addr = (unsigned long) page_address(bio_page(rq->bio)); | |
1929 | ||
1930 | info->cmd = rq_data_dir(rq); | |
1931 | info->dma = drive->using_dma; | |
1932 | ||
1933 | /* | |
1934 | * check if dma is safe | |
5d9e4ea5 LT |
1935 | * |
1936 | * NOTE! The "len" and "addr" checks should possibly have | |
1937 | * separate masks. | |
1da177e4 | 1938 | */ |
4e7c6816 | 1939 | if ((rq->data_len & 15) || (addr & mask)) |
1da177e4 LT |
1940 | info->dma = 0; |
1941 | } | |
1942 | ||
1943 | /* Start sending the command to the drive. */ | |
1944 | return cdrom_start_packet_command(drive, rq->data_len, cdrom_do_newpc_cont); | |
1945 | } | |
1946 | ||
1947 | /**************************************************************************** | |
1948 | * cdrom driver request routine. | |
1949 | */ | |
1950 | static ide_startstop_t | |
1951 | ide_do_rw_cdrom (ide_drive_t *drive, struct request *rq, sector_t block) | |
1952 | { | |
1953 | ide_startstop_t action; | |
1954 | struct cdrom_info *info = drive->driver_data; | |
1955 | ||
1956 | if (blk_fs_request(rq)) { | |
1957 | if (CDROM_CONFIG_FLAGS(drive)->seeking) { | |
1958 | unsigned long elapsed = jiffies - info->start_seek; | |
1959 | int stat = HWIF(drive)->INB(IDE_STATUS_REG); | |
1960 | ||
1961 | if ((stat & SEEK_STAT) != SEEK_STAT) { | |
1962 | if (elapsed < IDECD_SEEK_TIMEOUT) { | |
1963 | ide_stall_queue(drive, IDECD_SEEK_TIMER); | |
1964 | return ide_stopped; | |
1965 | } | |
1966 | printk (KERN_ERR "%s: DSC timeout\n", drive->name); | |
1967 | } | |
1968 | CDROM_CONFIG_FLAGS(drive)->seeking = 0; | |
1969 | } | |
1970 | if ((rq_data_dir(rq) == READ) && IDE_LARGE_SEEK(info->last_block, block, IDECD_SEEK_THRESHOLD) && drive->dsc_overlap) { | |
1971 | action = cdrom_start_seek(drive, block); | |
1972 | } else { | |
1973 | if (rq_data_dir(rq) == READ) | |
1974 | action = cdrom_start_read(drive, block); | |
1975 | else | |
1976 | action = cdrom_start_write(drive, rq); | |
1977 | } | |
1978 | info->last_block = block; | |
1979 | return action; | |
1980 | } else if (rq->flags & (REQ_PC | REQ_SENSE)) { | |
1981 | return cdrom_do_packet_command(drive); | |
1982 | } else if (rq->flags & REQ_BLOCK_PC) { | |
1983 | return cdrom_do_block_pc(drive, rq); | |
1984 | } else if (rq->flags & REQ_SPECIAL) { | |
1985 | /* | |
1986 | * right now this can only be a reset... | |
1987 | */ | |
1988 | cdrom_end_request(drive, 1); | |
1989 | return ide_stopped; | |
1990 | } | |
1991 | ||
1992 | blk_dump_rq_flags(rq, "ide-cd bad flags"); | |
1993 | cdrom_end_request(drive, 0); | |
1994 | return ide_stopped; | |
1995 | } | |
1996 | ||
1997 | ||
1998 | ||
1999 | /**************************************************************************** | |
2000 | * Ioctl handling. | |
2001 | * | |
2002 | * Routines which queue packet commands take as a final argument a pointer | |
2003 | * to a request_sense struct. If execution of the command results | |
2004 | * in an error with a CHECK CONDITION status, this structure will be filled | |
2005 | * with the results of the subsequent request sense command. The pointer | |
2006 | * can also be NULL, in which case no sense information is returned. | |
2007 | */ | |
2008 | ||
2009 | #if ! STANDARD_ATAPI | |
2010 | static inline | |
2011 | int bin2bcd (int x) | |
2012 | { | |
2013 | return (x%10) | ((x/10) << 4); | |
2014 | } | |
2015 | ||
2016 | ||
2017 | static inline | |
2018 | int bcd2bin (int x) | |
2019 | { | |
2020 | return (x >> 4) * 10 + (x & 0x0f); | |
2021 | } | |
2022 | ||
2023 | static | |
2024 | void msf_from_bcd (struct atapi_msf *msf) | |
2025 | { | |
2026 | msf->minute = bcd2bin (msf->minute); | |
2027 | msf->second = bcd2bin (msf->second); | |
2028 | msf->frame = bcd2bin (msf->frame); | |
2029 | } | |
2030 | ||
2031 | #endif /* not STANDARD_ATAPI */ | |
2032 | ||
2033 | ||
2034 | static inline | |
2035 | void lba_to_msf (int lba, byte *m, byte *s, byte *f) | |
2036 | { | |
2037 | lba += CD_MSF_OFFSET; | |
2038 | lba &= 0xffffff; /* negative lbas use only 24 bits */ | |
2039 | *m = lba / (CD_SECS * CD_FRAMES); | |
2040 | lba %= (CD_SECS * CD_FRAMES); | |
2041 | *s = lba / CD_FRAMES; | |
2042 | *f = lba % CD_FRAMES; | |
2043 | } | |
2044 | ||
2045 | ||
2046 | static inline | |
2047 | int msf_to_lba (byte m, byte s, byte f) | |
2048 | { | |
2049 | return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET; | |
2050 | } | |
2051 | ||
2052 | static int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) | |
2053 | { | |
2054 | struct request req; | |
2055 | struct cdrom_info *info = drive->driver_data; | |
2056 | struct cdrom_device_info *cdi = &info->devinfo; | |
2057 | ||
2058 | cdrom_prepare_request(drive, &req); | |
2059 | ||
2060 | req.sense = sense; | |
2061 | req.cmd[0] = GPCMD_TEST_UNIT_READY; | |
2062 | req.flags |= REQ_QUIET; | |
2063 | ||
2064 | #if ! STANDARD_ATAPI | |
2065 | /* the Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to | |
2066 | switch CDs instead of supporting the LOAD_UNLOAD opcode */ | |
2067 | ||
2068 | req.cmd[7] = cdi->sanyo_slot % 3; | |
2069 | #endif /* not STANDARD_ATAPI */ | |
2070 | ||
2071 | return cdrom_queue_packet_command(drive, &req); | |
2072 | } | |
2073 | ||
2074 | ||
2075 | /* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */ | |
2076 | static int | |
2077 | cdrom_lockdoor(ide_drive_t *drive, int lockflag, struct request_sense *sense) | |
2078 | { | |
2079 | struct request_sense my_sense; | |
2080 | struct request req; | |
2081 | int stat; | |
2082 | ||
2083 | if (sense == NULL) | |
2084 | sense = &my_sense; | |
2085 | ||
2086 | /* If the drive cannot lock the door, just pretend. */ | |
2087 | if (CDROM_CONFIG_FLAGS(drive)->no_doorlock) { | |
2088 | stat = 0; | |
2089 | } else { | |
2090 | cdrom_prepare_request(drive, &req); | |
2091 | req.sense = sense; | |
2092 | req.cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL; | |
2093 | req.cmd[4] = lockflag ? 1 : 0; | |
2094 | stat = cdrom_queue_packet_command(drive, &req); | |
2095 | } | |
2096 | ||
2097 | /* If we got an illegal field error, the drive | |
2098 | probably cannot lock the door. */ | |
2099 | if (stat != 0 && | |
2100 | sense->sense_key == ILLEGAL_REQUEST && | |
2101 | (sense->asc == 0x24 || sense->asc == 0x20)) { | |
2102 | printk (KERN_ERR "%s: door locking not supported\n", | |
2103 | drive->name); | |
2104 | CDROM_CONFIG_FLAGS(drive)->no_doorlock = 1; | |
2105 | stat = 0; | |
2106 | } | |
2107 | ||
2108 | /* no medium, that's alright. */ | |
2109 | if (stat != 0 && sense->sense_key == NOT_READY && sense->asc == 0x3a) | |
2110 | stat = 0; | |
2111 | ||
2112 | if (stat == 0) | |
2113 | CDROM_STATE_FLAGS(drive)->door_locked = lockflag; | |
2114 | ||
2115 | return stat; | |
2116 | } | |
2117 | ||
2118 | ||
2119 | /* Eject the disk if EJECTFLAG is 0. | |
2120 | If EJECTFLAG is 1, try to reload the disk. */ | |
2121 | static int cdrom_eject(ide_drive_t *drive, int ejectflag, | |
2122 | struct request_sense *sense) | |
2123 | { | |
2124 | struct request req; | |
2125 | char loej = 0x02; | |
2126 | ||
2127 | if (CDROM_CONFIG_FLAGS(drive)->no_eject && !ejectflag) | |
2128 | return -EDRIVE_CANT_DO_THIS; | |
2129 | ||
2130 | /* reload fails on some drives, if the tray is locked */ | |
2131 | if (CDROM_STATE_FLAGS(drive)->door_locked && ejectflag) | |
2132 | return 0; | |
2133 | ||
2134 | cdrom_prepare_request(drive, &req); | |
2135 | ||
2136 | /* only tell drive to close tray if open, if it can do that */ | |
2137 | if (ejectflag && !CDROM_CONFIG_FLAGS(drive)->close_tray) | |
2138 | loej = 0; | |
2139 | ||
2140 | req.sense = sense; | |
2141 | req.cmd[0] = GPCMD_START_STOP_UNIT; | |
2142 | req.cmd[4] = loej | (ejectflag != 0); | |
2143 | return cdrom_queue_packet_command(drive, &req); | |
2144 | } | |
2145 | ||
2146 | static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, | |
2147 | unsigned long *sectors_per_frame, | |
2148 | struct request_sense *sense) | |
2149 | { | |
2150 | struct { | |
2151 | __u32 lba; | |
2152 | __u32 blocklen; | |
2153 | } capbuf; | |
2154 | ||
2155 | int stat; | |
2156 | struct request req; | |
2157 | ||
2158 | cdrom_prepare_request(drive, &req); | |
2159 | ||
2160 | req.sense = sense; | |
2161 | req.cmd[0] = GPCMD_READ_CDVD_CAPACITY; | |
2162 | req.data = (char *)&capbuf; | |
2163 | req.data_len = sizeof(capbuf); | |
2164 | ||
2165 | stat = cdrom_queue_packet_command(drive, &req); | |
2166 | if (stat == 0) { | |
2167 | *capacity = 1 + be32_to_cpu(capbuf.lba); | |
2168 | *sectors_per_frame = | |
2169 | be32_to_cpu(capbuf.blocklen) >> SECTOR_BITS; | |
2170 | } | |
2171 | ||
2172 | return stat; | |
2173 | } | |
2174 | ||
2175 | static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, | |
2176 | int format, char *buf, int buflen, | |
2177 | struct request_sense *sense) | |
2178 | { | |
2179 | struct request req; | |
2180 | ||
2181 | cdrom_prepare_request(drive, &req); | |
2182 | ||
2183 | req.sense = sense; | |
2184 | req.data = buf; | |
2185 | req.data_len = buflen; | |
2186 | req.flags |= REQ_QUIET; | |
2187 | req.cmd[0] = GPCMD_READ_TOC_PMA_ATIP; | |
2188 | req.cmd[6] = trackno; | |
2189 | req.cmd[7] = (buflen >> 8); | |
2190 | req.cmd[8] = (buflen & 0xff); | |
2191 | req.cmd[9] = (format << 6); | |
2192 | ||
2193 | if (msf_flag) | |
2194 | req.cmd[1] = 2; | |
2195 | ||
2196 | return cdrom_queue_packet_command(drive, &req); | |
2197 | } | |
2198 | ||
2199 | ||
2200 | /* Try to read the entire TOC for the disk into our internal buffer. */ | |
2201 | static int cdrom_read_toc(ide_drive_t *drive, struct request_sense *sense) | |
2202 | { | |
2203 | int stat, ntracks, i; | |
2204 | struct cdrom_info *info = drive->driver_data; | |
2205 | struct cdrom_device_info *cdi = &info->devinfo; | |
2206 | struct atapi_toc *toc = info->toc; | |
2207 | struct { | |
2208 | struct atapi_toc_header hdr; | |
2209 | struct atapi_toc_entry ent; | |
2210 | } ms_tmp; | |
2211 | long last_written; | |
2212 | unsigned long sectors_per_frame = SECTORS_PER_FRAME; | |
2213 | ||
2214 | if (toc == NULL) { | |
2215 | /* Try to allocate space. */ | |
2216 | toc = (struct atapi_toc *) kmalloc (sizeof (struct atapi_toc), | |
2217 | GFP_KERNEL); | |
2218 | info->toc = toc; | |
2219 | if (toc == NULL) { | |
2220 | printk (KERN_ERR "%s: No cdrom TOC buffer!\n", drive->name); | |
2221 | return -ENOMEM; | |
2222 | } | |
2223 | } | |
2224 | ||
2225 | /* Check to see if the existing data is still valid. | |
2226 | If it is, just return. */ | |
2227 | (void) cdrom_check_status(drive, sense); | |
2228 | ||
2229 | if (CDROM_STATE_FLAGS(drive)->toc_valid) | |
2230 | return 0; | |
2231 | ||
2232 | /* Try to get the total cdrom capacity and sector size. */ | |
2233 | stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, | |
2234 | sense); | |
2235 | if (stat) | |
2236 | toc->capacity = 0x1fffff; | |
2237 | ||
2238 | set_capacity(info->disk, toc->capacity * sectors_per_frame); | |
2239 | blk_queue_hardsect_size(drive->queue, | |
2240 | sectors_per_frame << SECTOR_BITS); | |
2241 | ||
2242 | /* First read just the header, so we know how long the TOC is. */ | |
2243 | stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, | |
2244 | sizeof(struct atapi_toc_header), sense); | |
2245 | if (stat) return stat; | |
2246 | ||
2247 | #if ! STANDARD_ATAPI | |
2248 | if (CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd) { | |
2249 | toc->hdr.first_track = bcd2bin(toc->hdr.first_track); | |
2250 | toc->hdr.last_track = bcd2bin(toc->hdr.last_track); | |
2251 | } | |
2252 | #endif /* not STANDARD_ATAPI */ | |
2253 | ||
2254 | ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; | |
2255 | if (ntracks <= 0) | |
2256 | return -EIO; | |
2257 | if (ntracks > MAX_TRACKS) | |
2258 | ntracks = MAX_TRACKS; | |
2259 | ||
2260 | /* Now read the whole schmeer. */ | |
2261 | stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, | |
2262 | (char *)&toc->hdr, | |
2263 | sizeof(struct atapi_toc_header) + | |
2264 | (ntracks + 1) * | |
2265 | sizeof(struct atapi_toc_entry), sense); | |
2266 | ||
2267 | if (stat && toc->hdr.first_track > 1) { | |
2268 | /* Cds with CDI tracks only don't have any TOC entries, | |
2269 | despite of this the returned values are | |
2270 | first_track == last_track = number of CDI tracks + 1, | |
2271 | so that this case is indistinguishable from the same | |
2272 | layout plus an additional audio track. | |
2273 | If we get an error for the regular case, we assume | |
2274 | a CDI without additional audio tracks. In this case | |
2275 | the readable TOC is empty (CDI tracks are not included) | |
2276 |