Commit | Line | Data |
---|---|---|
594c16d8 BZ |
1 | /* |
2 | * ATAPI support. | |
3 | */ | |
4 | ||
5 | #include <linux/kernel.h> | |
4cad085e | 6 | #include <linux/cdrom.h> |
594c16d8 | 7 | #include <linux/delay.h> |
38789fda | 8 | #include <linux/export.h> |
594c16d8 | 9 | #include <linux/ide.h> |
479edf06 | 10 | #include <linux/scatterlist.h> |
5a0e3ad6 | 11 | #include <linux/gfp.h> |
479edf06 | 12 | |
646c0cb6 BZ |
13 | #include <scsi/scsi.h> |
14 | ||
103f7033 BP |
15 | #define DRV_NAME "ide-atapi" |
16 | #define PFX DRV_NAME ": " | |
17 | ||
646c0cb6 BZ |
18 | #ifdef DEBUG |
19 | #define debug_log(fmt, args...) \ | |
20 | printk(KERN_INFO "ide: " fmt, ## args) | |
21 | #else | |
22 | #define debug_log(fmt, args...) do {} while (0) | |
23 | #endif | |
24 | ||
8c662852 BP |
25 | #define ATAPI_MIN_CDB_BYTES 12 |
26 | ||
991cb26a BP |
27 | static inline int dev_is_idecd(ide_drive_t *drive) |
28 | { | |
5317464d | 29 | return drive->media == ide_cdrom || drive->media == ide_optical; |
991cb26a BP |
30 | } |
31 | ||
51509eec BZ |
32 | /* |
33 | * Check whether we can support a device, | |
34 | * based on the ATAPI IDENTIFY command results. | |
35 | */ | |
36 | int ide_check_atapi_device(ide_drive_t *drive, const char *s) | |
37 | { | |
38 | u16 *id = drive->id; | |
39 | u8 gcw[2], protocol, device_type, removable, drq_type, packet_size; | |
40 | ||
41 | *((u16 *)&gcw) = id[ATA_ID_CONFIG]; | |
42 | ||
43 | protocol = (gcw[1] & 0xC0) >> 6; | |
44 | device_type = gcw[1] & 0x1F; | |
45 | removable = (gcw[0] & 0x80) >> 7; | |
46 | drq_type = (gcw[0] & 0x60) >> 5; | |
47 | packet_size = gcw[0] & 0x03; | |
48 | ||
49 | #ifdef CONFIG_PPC | |
50 | /* kludge for Apple PowerBook internal zip */ | |
51 | if (drive->media == ide_floppy && device_type == 5 && | |
52 | !strstr((char *)&id[ATA_ID_PROD], "CD-ROM") && | |
53 | strstr((char *)&id[ATA_ID_PROD], "ZIP")) | |
54 | device_type = 0; | |
55 | #endif | |
56 | ||
57 | if (protocol != 2) | |
58 | printk(KERN_ERR "%s: %s: protocol (0x%02x) is not ATAPI\n", | |
59 | s, drive->name, protocol); | |
60 | else if ((drive->media == ide_floppy && device_type != 0) || | |
61 | (drive->media == ide_tape && device_type != 1)) | |
62 | printk(KERN_ERR "%s: %s: invalid device type (0x%02x)\n", | |
63 | s, drive->name, device_type); | |
64 | else if (removable == 0) | |
65 | printk(KERN_ERR "%s: %s: the removable flag is not set\n", | |
66 | s, drive->name); | |
67 | else if (drive->media == ide_floppy && drq_type == 3) | |
68 | printk(KERN_ERR "%s: %s: sorry, DRQ type (0x%02x) not " | |
69 | "supported\n", s, drive->name, drq_type); | |
70 | else if (packet_size != 0) | |
71 | printk(KERN_ERR "%s: %s: packet size (0x%02x) is not 12 " | |
72 | "bytes\n", s, drive->name, packet_size); | |
73 | else | |
74 | return 1; | |
75 | return 0; | |
76 | } | |
77 | EXPORT_SYMBOL_GPL(ide_check_atapi_device); | |
78 | ||
7bf7420a BZ |
79 | void ide_init_pc(struct ide_atapi_pc *pc) |
80 | { | |
81 | memset(pc, 0, sizeof(*pc)); | |
7bf7420a BZ |
82 | } |
83 | EXPORT_SYMBOL_GPL(ide_init_pc); | |
84 | ||
2ac07d92 BZ |
85 | /* |
86 | * Add a special packet command request to the tail of the request queue, | |
87 | * and wait for it to be serviced. | |
88 | */ | |
89 | int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk, | |
b13345f3 | 90 | struct ide_atapi_pc *pc, void *buf, unsigned int bufflen) |
2ac07d92 BZ |
91 | { |
92 | struct request *rq; | |
93 | int error; | |
94 | ||
71baba4b | 95 | rq = blk_get_request(drive->queue, READ, __GFP_RECLAIM); |
4f8c9510 | 96 | rq->cmd_type = REQ_TYPE_DRV_PRIV; |
c267cc1c | 97 | rq->special = (char *)pc; |
3eb76c1c | 98 | |
b13345f3 BP |
99 | if (buf && bufflen) { |
100 | error = blk_rq_map_kern(drive->queue, rq, buf, bufflen, | |
5c4be572 TH |
101 | GFP_NOIO); |
102 | if (error) | |
103 | goto put_req; | |
3eb76c1c BP |
104 | } |
105 | ||
2ac07d92 BZ |
106 | memcpy(rq->cmd, pc->c, 12); |
107 | if (drive->media == ide_tape) | |
108 | rq->cmd[13] = REQ_IDETAPE_PC1; | |
109 | error = blk_execute_rq(drive->queue, disk, rq, 0); | |
5c4be572 | 110 | put_req: |
2ac07d92 | 111 | blk_put_request(rq); |
2ac07d92 BZ |
112 | return error; |
113 | } | |
114 | EXPORT_SYMBOL_GPL(ide_queue_pc_tail); | |
115 | ||
de699ad5 BZ |
116 | int ide_do_test_unit_ready(ide_drive_t *drive, struct gendisk *disk) |
117 | { | |
118 | struct ide_atapi_pc pc; | |
119 | ||
120 | ide_init_pc(&pc); | |
121 | pc.c[0] = TEST_UNIT_READY; | |
122 | ||
b13345f3 | 123 | return ide_queue_pc_tail(drive, disk, &pc, NULL, 0); |
de699ad5 BZ |
124 | } |
125 | EXPORT_SYMBOL_GPL(ide_do_test_unit_ready); | |
126 | ||
0c8a6c7a BZ |
127 | int ide_do_start_stop(ide_drive_t *drive, struct gendisk *disk, int start) |
128 | { | |
129 | struct ide_atapi_pc pc; | |
130 | ||
131 | ide_init_pc(&pc); | |
132 | pc.c[0] = START_STOP; | |
133 | pc.c[4] = start; | |
134 | ||
135 | if (drive->media == ide_tape) | |
136 | pc.flags |= PC_FLAG_WAIT_FOR_DSC; | |
137 | ||
b13345f3 | 138 | return ide_queue_pc_tail(drive, disk, &pc, NULL, 0); |
0c8a6c7a BZ |
139 | } |
140 | EXPORT_SYMBOL_GPL(ide_do_start_stop); | |
141 | ||
0578042d BZ |
142 | int ide_set_media_lock(ide_drive_t *drive, struct gendisk *disk, int on) |
143 | { | |
144 | struct ide_atapi_pc pc; | |
145 | ||
42619d35 | 146 | if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) |
0578042d BZ |
147 | return 0; |
148 | ||
149 | ide_init_pc(&pc); | |
150 | pc.c[0] = ALLOW_MEDIUM_REMOVAL; | |
151 | pc.c[4] = on; | |
152 | ||
b13345f3 | 153 | return ide_queue_pc_tail(drive, disk, &pc, NULL, 0); |
0578042d BZ |
154 | } |
155 | EXPORT_SYMBOL_GPL(ide_set_media_lock); | |
156 | ||
6b0da28b BZ |
157 | void ide_create_request_sense_cmd(ide_drive_t *drive, struct ide_atapi_pc *pc) |
158 | { | |
159 | ide_init_pc(pc); | |
160 | pc->c[0] = REQUEST_SENSE; | |
161 | if (drive->media == ide_floppy) { | |
162 | pc->c[4] = 255; | |
163 | pc->req_xfer = 18; | |
164 | } else { | |
165 | pc->c[4] = 20; | |
166 | pc->req_xfer = 20; | |
167 | } | |
168 | } | |
169 | EXPORT_SYMBOL_GPL(ide_create_request_sense_cmd); | |
170 | ||
a1df5169 BP |
171 | void ide_prep_sense(ide_drive_t *drive, struct request *rq) |
172 | { | |
173 | struct request_sense *sense = &drive->sense_data; | |
174 | struct request *sense_rq = &drive->sense_rq; | |
175 | unsigned int cmd_len, sense_len; | |
5c4be572 | 176 | int err; |
a1df5169 | 177 | |
a1df5169 BP |
178 | switch (drive->media) { |
179 | case ide_floppy: | |
180 | cmd_len = 255; | |
181 | sense_len = 18; | |
182 | break; | |
183 | case ide_tape: | |
184 | cmd_len = 20; | |
185 | sense_len = 20; | |
186 | break; | |
187 | default: | |
188 | cmd_len = 18; | |
189 | sense_len = 18; | |
190 | } | |
191 | ||
192 | BUG_ON(sense_len > sizeof(*sense)); | |
193 | ||
b0b93b48 | 194 | if (rq->cmd_type == REQ_TYPE_ATA_SENSE || drive->sense_rq_armed) |
a1df5169 BP |
195 | return; |
196 | ||
197 | memset(sense, 0, sizeof(*sense)); | |
198 | ||
199 | blk_rq_init(rq->q, sense_rq); | |
a1df5169 | 200 | |
5c4be572 TH |
201 | err = blk_rq_map_kern(drive->queue, sense_rq, sense, sense_len, |
202 | GFP_NOIO); | |
203 | if (unlikely(err)) { | |
204 | if (printk_ratelimit()) | |
103f7033 BP |
205 | printk(KERN_WARNING PFX "%s: failed to map sense " |
206 | "buffer\n", drive->name); | |
5c4be572 TH |
207 | return; |
208 | } | |
209 | ||
210 | sense_rq->rq_disk = rq->rq_disk; | |
a1df5169 BP |
211 | sense_rq->cmd[0] = GPCMD_REQUEST_SENSE; |
212 | sense_rq->cmd[4] = cmd_len; | |
b0b93b48 | 213 | sense_rq->cmd_type = REQ_TYPE_ATA_SENSE; |
a1df5169 BP |
214 | sense_rq->cmd_flags |= REQ_PREEMPT; |
215 | ||
216 | if (drive->media == ide_tape) | |
217 | sense_rq->cmd[13] = REQ_IDETAPE_PC1; | |
218 | ||
219 | drive->sense_rq_armed = true; | |
220 | } | |
221 | EXPORT_SYMBOL_GPL(ide_prep_sense); | |
222 | ||
5c4be572 | 223 | int ide_queue_sense_rq(ide_drive_t *drive, void *special) |
a1df5169 | 224 | { |
5c4be572 TH |
225 | /* deferred failure from ide_prep_sense() */ |
226 | if (!drive->sense_rq_armed) { | |
103f7033 | 227 | printk(KERN_WARNING PFX "%s: error queuing a sense request\n", |
5c4be572 TH |
228 | drive->name); |
229 | return -ENOMEM; | |
230 | } | |
a1df5169 BP |
231 | |
232 | drive->sense_rq.special = special; | |
233 | drive->sense_rq_armed = false; | |
234 | ||
235 | drive->hwif->rq = NULL; | |
236 | ||
7eaceacc | 237 | elv_add_request(drive->queue, &drive->sense_rq, ELEVATOR_INSERT_FRONT); |
5c4be572 | 238 | return 0; |
a1df5169 BP |
239 | } |
240 | EXPORT_SYMBOL_GPL(ide_queue_sense_rq); | |
241 | ||
6b0da28b BZ |
242 | /* |
243 | * Called when an error was detected during the last packet command. | |
6b544fcc BP |
244 | * We queue a request sense packet command at the head of the request |
245 | * queue. | |
6b0da28b | 246 | */ |
6b544fcc | 247 | void ide_retry_pc(ide_drive_t *drive) |
6b0da28b | 248 | { |
8f6205cd | 249 | struct request *failed_rq = drive->hwif->rq; |
6b544fcc | 250 | struct request *sense_rq = &drive->sense_rq; |
6b0da28b BZ |
251 | struct ide_atapi_pc *pc = &drive->request_sense_pc; |
252 | ||
253 | (void)ide_read_error(drive); | |
6b544fcc BP |
254 | |
255 | /* init pc from sense_rq */ | |
256 | ide_init_pc(pc); | |
257 | memcpy(pc->c, sense_rq->cmd, 12); | |
6b544fcc | 258 | |
6b0da28b | 259 | if (drive->media == ide_tape) |
626542ca | 260 | drive->atapi_flags |= IDE_AFLAG_IGNORE_DSC; |
6b544fcc | 261 | |
8f6205cd TH |
262 | /* |
263 | * Push back the failed request and put request sense on top | |
264 | * of it. The failed command will be retried after sense data | |
265 | * is acquired. | |
266 | */ | |
8f6205cd | 267 | drive->hwif->rq = NULL; |
1af18503 | 268 | ide_requeue_and_plug(drive, failed_rq); |
8f6205cd | 269 | if (ide_queue_sense_rq(drive, pc)) { |
9934c8c0 | 270 | blk_start_request(failed_rq); |
8f6205cd TH |
271 | ide_complete_rq(drive, -EIO, blk_rq_bytes(failed_rq)); |
272 | } | |
6b0da28b BZ |
273 | } |
274 | EXPORT_SYMBOL_GPL(ide_retry_pc); | |
275 | ||
4cad085e BP |
276 | int ide_cd_expiry(ide_drive_t *drive) |
277 | { | |
b65fac32 | 278 | struct request *rq = drive->hwif->rq; |
4cad085e BP |
279 | unsigned long wait = 0; |
280 | ||
281 | debug_log("%s: rq->cmd[0]: 0x%x\n", __func__, rq->cmd[0]); | |
282 | ||
283 | /* | |
284 | * Some commands are *slow* and normally take a long time to complete. | |
285 | * Usually we can use the ATAPI "disconnect" to bypass this, but not all | |
286 | * commands/drives support that. Let ide_timer_expiry keep polling us | |
287 | * for these. | |
288 | */ | |
289 | switch (rq->cmd[0]) { | |
290 | case GPCMD_BLANK: | |
291 | case GPCMD_FORMAT_UNIT: | |
292 | case GPCMD_RESERVE_RZONE_TRACK: | |
293 | case GPCMD_CLOSE_TRACK: | |
294 | case GPCMD_FLUSH_CACHE: | |
295 | wait = ATAPI_WAIT_PC; | |
296 | break; | |
297 | default: | |
298 | if (!(rq->cmd_flags & REQ_QUIET)) | |
103f7033 | 299 | printk(KERN_INFO PFX "cmd 0x%x timed out\n", |
4cad085e BP |
300 | rq->cmd[0]); |
301 | wait = 0; | |
302 | break; | |
303 | } | |
304 | return wait; | |
305 | } | |
306 | EXPORT_SYMBOL_GPL(ide_cd_expiry); | |
307 | ||
392de1d5 BP |
308 | int ide_cd_get_xferlen(struct request *rq) |
309 | { | |
4c4762d1 | 310 | switch (rq->cmd_type) { |
33659ebb | 311 | case REQ_TYPE_FS: |
392de1d5 | 312 | return 32768; |
b0b93b48 | 313 | case REQ_TYPE_ATA_SENSE: |
33659ebb CH |
314 | case REQ_TYPE_BLOCK_PC: |
315 | case REQ_TYPE_ATA_PC: | |
34b7d2c9 | 316 | return blk_rq_bytes(rq); |
33659ebb | 317 | default: |
392de1d5 | 318 | return 0; |
33659ebb | 319 | } |
392de1d5 BP |
320 | } |
321 | EXPORT_SYMBOL_GPL(ide_cd_get_xferlen); | |
322 | ||
0d6a9754 BZ |
323 | void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason) |
324 | { | |
3153c26b | 325 | struct ide_taskfile tf; |
0d6a9754 | 326 | |
3153c26b SS |
327 | drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_NSECT | |
328 | IDE_VALID_LBAM | IDE_VALID_LBAH); | |
0d6a9754 | 329 | |
3153c26b SS |
330 | *bcount = (tf.lbah << 8) | tf.lbam; |
331 | *ireason = tf.nsect & 3; | |
0d6a9754 BZ |
332 | } |
333 | EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason); | |
334 | ||
103f7033 BP |
335 | /* |
336 | * Check the contents of the interrupt reason register and attempt to recover if | |
337 | * there are problems. | |
338 | * | |
339 | * Returns: | |
340 | * - 0 if everything's ok | |
341 | * - 1 if the request has to be terminated. | |
342 | */ | |
343 | int ide_check_ireason(ide_drive_t *drive, struct request *rq, int len, | |
344 | int ireason, int rw) | |
345 | { | |
346 | ide_hwif_t *hwif = drive->hwif; | |
347 | ||
348 | debug_log("ireason: 0x%x, rw: 0x%x\n", ireason, rw); | |
349 | ||
350 | if (ireason == (!rw << 1)) | |
351 | return 0; | |
352 | else if (ireason == (rw << 1)) { | |
353 | printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n", | |
354 | drive->name, __func__); | |
355 | ||
356 | if (dev_is_idecd(drive)) | |
357 | ide_pad_transfer(drive, rw, len); | |
358 | } else if (!rw && ireason == ATAPI_COD) { | |
359 | if (dev_is_idecd(drive)) { | |
360 | /* | |
361 | * Some drives (ASUS) seem to tell us that status info | |
362 | * is available. Just get it and ignore. | |
363 | */ | |
364 | (void)hwif->tp_ops->read_status(hwif); | |
365 | return 0; | |
366 | } | |
367 | } else { | |
368 | if (ireason & ATAPI_COD) | |
369 | printk(KERN_ERR PFX "%s: CoD != 0 in %s\n", drive->name, | |
370 | __func__); | |
371 | ||
372 | /* drive wants a command packet, or invalid ireason... */ | |
373 | printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n", | |
374 | drive->name, __func__, ireason); | |
375 | } | |
376 | ||
377 | if (dev_is_idecd(drive) && rq->cmd_type == REQ_TYPE_ATA_PC) | |
378 | rq->cmd_flags |= REQ_FAILED; | |
379 | ||
380 | return 1; | |
381 | } | |
382 | EXPORT_SYMBOL_GPL(ide_check_ireason); | |
383 | ||
aa5d2de7 BZ |
384 | /* |
385 | * This is the usual interrupt handler which will be called during a packet | |
386 | * command. We will transfer some of the data (as requested by the drive) | |
387 | * and will re-point interrupt handler to us. | |
388 | */ | |
389 | static ide_startstop_t ide_pc_intr(ide_drive_t *drive) | |
646c0cb6 | 390 | { |
2b9efba4 | 391 | struct ide_atapi_pc *pc = drive->pc; |
646c0cb6 | 392 | ide_hwif_t *hwif = drive->hwif; |
f094d4d8 | 393 | struct ide_cmd *cmd = &hwif->cmd; |
b65fac32 | 394 | struct request *rq = hwif->rq; |
374e042c | 395 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
d93bc452 | 396 | unsigned int timeout, done; |
646c0cb6 | 397 | u16 bcount; |
5d655a03 | 398 | u8 stat, ireason, dsc = 0; |
d93bc452 | 399 | u8 write = !!(pc->flags & PC_FLAG_WRITING); |
646c0cb6 BZ |
400 | |
401 | debug_log("Enter %s - interrupt handler\n", __func__); | |
402 | ||
5d655a03 BP |
403 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD |
404 | : WAIT_TAPE_CMD; | |
844b9468 | 405 | |
646c0cb6 | 406 | /* Clear the interrupt */ |
374e042c | 407 | stat = tp_ops->read_status(hwif); |
646c0cb6 BZ |
408 | |
409 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
88b4132e | 410 | int rc; |
4453011f | 411 | |
88b4132e BZ |
412 | drive->waiting_for_dma = 0; |
413 | rc = hwif->dma_ops->dma_end(drive); | |
f094d4d8 | 414 | ide_dma_unmap_sg(drive, cmd); |
4453011f BZ |
415 | |
416 | if (rc || (drive->media == ide_tape && (stat & ATA_ERR))) { | |
5d655a03 | 417 | if (drive->media == ide_floppy) |
103f7033 | 418 | printk(KERN_ERR PFX "%s: DMA %s error\n", |
646c0cb6 BZ |
419 | drive->name, rq_data_dir(pc->rq) |
420 | ? "write" : "read"); | |
421 | pc->flags |= PC_FLAG_DMA_ERROR; | |
6d700387 | 422 | } else |
077e6dba | 423 | rq->resid_len = 0; |
646c0cb6 BZ |
424 | debug_log("%s: DMA finished\n", drive->name); |
425 | } | |
426 | ||
427 | /* No more interrupts */ | |
3a7d2484 | 428 | if ((stat & ATA_DRQ) == 0) { |
5b6c942d | 429 | int uptodate, error; |
03a2faae | 430 | |
646c0cb6 | 431 | debug_log("Packet command completed, %d bytes transferred\n", |
077e6dba | 432 | blk_rq_bytes(rq)); |
646c0cb6 BZ |
433 | |
434 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
435 | ||
436 | local_irq_enable_in_hardirq(); | |
437 | ||
5d655a03 | 438 | if (drive->media == ide_tape && |
3a7d2484 BZ |
439 | (stat & ATA_ERR) && rq->cmd[0] == REQUEST_SENSE) |
440 | stat &= ~ATA_ERR; | |
8fccf899 | 441 | |
3a7d2484 | 442 | if ((stat & ATA_ERR) || (pc->flags & PC_FLAG_DMA_ERROR)) { |
646c0cb6 BZ |
443 | /* Error detected */ |
444 | debug_log("%s: I/O error\n", drive->name); | |
445 | ||
5d655a03 | 446 | if (drive->media != ide_tape) |
646c0cb6 | 447 | pc->rq->errors++; |
646c0cb6 | 448 | |
8fccf899 | 449 | if (rq->cmd[0] == REQUEST_SENSE) { |
103f7033 BP |
450 | printk(KERN_ERR PFX "%s: I/O error in request " |
451 | "sense command\n", drive->name); | |
646c0cb6 BZ |
452 | return ide_do_reset(drive); |
453 | } | |
454 | ||
8fccf899 | 455 | debug_log("[cmd %x]: check condition\n", rq->cmd[0]); |
646c0cb6 BZ |
456 | |
457 | /* Retry operation */ | |
6b544fcc | 458 | ide_retry_pc(drive); |
8fccf899 | 459 | |
646c0cb6 BZ |
460 | /* queued, but not started */ |
461 | return ide_stopped; | |
462 | } | |
646c0cb6 | 463 | pc->error = 0; |
b14c7212 BZ |
464 | |
465 | if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) && (stat & ATA_DSC) == 0) | |
466 | dsc = 1; | |
8fccf899 | 467 | |
b3071d19 TH |
468 | /* |
469 | * ->pc_callback() might change rq->data_len for | |
470 | * residual count, cache total length. | |
471 | */ | |
21d9c5d2 | 472 | done = blk_rq_bytes(rq); |
b3071d19 | 473 | |
646c0cb6 | 474 | /* Command finished - Call the callback function */ |
03a2faae BZ |
475 | uptodate = drive->pc_callback(drive, dsc); |
476 | ||
477 | if (uptodate == 0) | |
478 | drive->failed_pc = NULL; | |
479 | ||
4f8c9510 | 480 | if (rq->cmd_type == REQ_TYPE_DRV_PRIV) { |
6902a533 | 481 | rq->errors = 0; |
5b6c942d | 482 | error = 0; |
89f78b32 | 483 | } else { |
349d12a1 | 484 | |
4c4762d1 | 485 | if (rq->cmd_type != REQ_TYPE_FS && uptodate <= 0) { |
89f78b32 BZ |
486 | if (rq->errors == 0) |
487 | rq->errors = -EIO; | |
488 | } | |
349d12a1 | 489 | |
5b6c942d | 490 | error = uptodate ? 0 : -EIO; |
89f78b32 | 491 | } |
8fccf899 | 492 | |
c3a4d78c | 493 | ide_complete_rq(drive, error, blk_rq_bytes(rq)); |
646c0cb6 BZ |
494 | return ide_stopped; |
495 | } | |
496 | ||
497 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
498 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
103f7033 BP |
499 | printk(KERN_ERR PFX "%s: The device wants to issue more " |
500 | "interrupts in DMA mode\n", drive->name); | |
646c0cb6 BZ |
501 | ide_dma_off(drive); |
502 | return ide_do_reset(drive); | |
503 | } | |
646c0cb6 | 504 | |
1823649b BZ |
505 | /* Get the number of bytes to transfer on this interrupt. */ |
506 | ide_read_bcount_and_ireason(drive, &bcount, &ireason); | |
646c0cb6 | 507 | |
103f7033 | 508 | if (ide_check_ireason(drive, rq, bcount, ireason, write)) |
646c0cb6 | 509 | return ide_do_reset(drive); |
8fccf899 | 510 | |
6d700387 TH |
511 | done = min_t(unsigned int, bcount, cmd->nleft); |
512 | ide_pio_bytes(drive, cmd, write, done); | |
646c0cb6 | 513 | |
6d700387 | 514 | /* Update transferred byte count */ |
077e6dba | 515 | rq->resid_len -= done; |
d93bc452 BZ |
516 | |
517 | bcount -= done; | |
518 | ||
519 | if (bcount) | |
520 | ide_pad_transfer(drive, write, bcount); | |
521 | ||
077e6dba BP |
522 | debug_log("[cmd %x] transferred %d bytes, padded %d bytes, resid: %u\n", |
523 | rq->cmd[0], done, bcount, rq->resid_len); | |
646c0cb6 | 524 | |
646c0cb6 | 525 | /* And set the interrupt handler again */ |
60c0cd02 | 526 | ide_set_handler(drive, ide_pc_intr, timeout); |
646c0cb6 BZ |
527 | return ide_started; |
528 | } | |
594c16d8 | 529 | |
60f85019 | 530 | static void ide_init_packet_cmd(struct ide_cmd *cmd, u8 valid_tf, |
b788ee9c | 531 | u16 bcount, u8 dma) |
7a254df0 | 532 | { |
60f85019 SS |
533 | cmd->protocol = dma ? ATAPI_PROT_DMA : ATAPI_PROT_PIO; |
534 | cmd->valid.out.tf = IDE_VALID_LBAH | IDE_VALID_LBAM | | |
535 | IDE_VALID_FEATURE | valid_tf; | |
35b5d0be | 536 | cmd->tf.command = ATA_CMD_PACKET; |
b788ee9c BZ |
537 | cmd->tf.feature = dma; /* Use PIO/DMA */ |
538 | cmd->tf.lbam = bcount & 0xff; | |
539 | cmd->tf.lbah = (bcount >> 8) & 0xff; | |
7a254df0 BZ |
540 | } |
541 | ||
88a72109 BZ |
542 | static u8 ide_read_ireason(ide_drive_t *drive) |
543 | { | |
3153c26b | 544 | struct ide_taskfile tf; |
88a72109 | 545 | |
3153c26b | 546 | drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_NSECT); |
88a72109 | 547 | |
3153c26b | 548 | return tf.nsect & 3; |
88a72109 BZ |
549 | } |
550 | ||
594c16d8 BZ |
551 | static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason) |
552 | { | |
594c16d8 BZ |
553 | int retries = 100; |
554 | ||
3a7d2484 BZ |
555 | while (retries-- && ((ireason & ATAPI_COD) == 0 || |
556 | (ireason & ATAPI_IO))) { | |
103f7033 | 557 | printk(KERN_ERR PFX "%s: (IO,CoD != (0,1) while issuing " |
594c16d8 BZ |
558 | "a packet command, retrying\n", drive->name); |
559 | udelay(100); | |
88a72109 | 560 | ireason = ide_read_ireason(drive); |
594c16d8 | 561 | if (retries == 0) { |
103f7033 BP |
562 | printk(KERN_ERR PFX "%s: (IO,CoD != (0,1) while issuing" |
563 | " a packet command, ignoring\n", | |
594c16d8 | 564 | drive->name); |
3a7d2484 BZ |
565 | ireason |= ATAPI_COD; |
566 | ireason &= ~ATAPI_IO; | |
594c16d8 BZ |
567 | } |
568 | } | |
569 | ||
570 | return ireason; | |
571 | } | |
572 | ||
baf08f0b BZ |
573 | static int ide_delayed_transfer_pc(ide_drive_t *drive) |
574 | { | |
575 | /* Send the actual packet */ | |
576 | drive->hwif->tp_ops->output_data(drive, NULL, drive->pc->c, 12); | |
577 | ||
578 | /* Timeout for the packet command */ | |
579 | return WAIT_FLOPPY_CMD; | |
580 | } | |
581 | ||
582 | static ide_startstop_t ide_transfer_pc(ide_drive_t *drive) | |
594c16d8 | 583 | { |
b16aabc9 | 584 | struct ide_atapi_pc *uninitialized_var(pc); |
594c16d8 | 585 | ide_hwif_t *hwif = drive->hwif; |
b65fac32 | 586 | struct request *rq = hwif->rq; |
baf08f0b BZ |
587 | ide_expiry_t *expiry; |
588 | unsigned int timeout; | |
8c662852 | 589 | int cmd_len; |
594c16d8 BZ |
590 | ide_startstop_t startstop; |
591 | u8 ireason; | |
592 | ||
3a7d2484 | 593 | if (ide_wait_stat(&startstop, drive, ATA_DRQ, ATA_BUSY, WAIT_READY)) { |
103f7033 | 594 | printk(KERN_ERR PFX "%s: Strange, packet command initiated yet " |
594c16d8 BZ |
595 | "DRQ isn't asserted\n", drive->name); |
596 | return startstop; | |
597 | } | |
598 | ||
5f25843f BP |
599 | if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { |
600 | if (drive->dma) | |
601 | drive->waiting_for_dma = 1; | |
602 | } | |
603 | ||
8c662852 BP |
604 | if (dev_is_idecd(drive)) { |
605 | /* ATAPI commands get padded out to 12 bytes minimum */ | |
606 | cmd_len = COMMAND_SIZE(rq->cmd[0]); | |
607 | if (cmd_len < ATAPI_MIN_CDB_BYTES) | |
608 | cmd_len = ATAPI_MIN_CDB_BYTES; | |
8c662852 | 609 | |
def860d0 BP |
610 | timeout = rq->timeout; |
611 | expiry = ide_cd_expiry; | |
baf08f0b | 612 | } else { |
b16aabc9 BP |
613 | pc = drive->pc; |
614 | ||
def860d0 BP |
615 | cmd_len = ATAPI_MIN_CDB_BYTES; |
616 | ||
617 | /* | |
618 | * If necessary schedule the packet transfer to occur 'timeout' | |
19af5cdb | 619 | * milliseconds later in ide_delayed_transfer_pc() after the |
def860d0 BP |
620 | * device says it's ready for a packet. |
621 | */ | |
622 | if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) { | |
623 | timeout = drive->pc_delay; | |
624 | expiry = &ide_delayed_transfer_pc; | |
625 | } else { | |
626 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD | |
627 | : WAIT_TAPE_CMD; | |
628 | expiry = NULL; | |
629 | } | |
06cc2778 BP |
630 | |
631 | ireason = ide_read_ireason(drive); | |
632 | if (drive->media == ide_tape) | |
633 | ireason = ide_wait_ireason(drive, ireason); | |
634 | ||
635 | if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_IO)) { | |
103f7033 BP |
636 | printk(KERN_ERR PFX "%s: (IO,CoD) != (0,1) while " |
637 | "issuing a packet command\n", drive->name); | |
06cc2778 BP |
638 | |
639 | return ide_do_reset(drive); | |
640 | } | |
baf08f0b BZ |
641 | } |
642 | ||
60c0cd02 BZ |
643 | hwif->expiry = expiry; |
644 | ||
594c16d8 | 645 | /* Set the interrupt routine */ |
d6251d44 BP |
646 | ide_set_handler(drive, |
647 | (dev_is_idecd(drive) ? drive->irq_handler | |
648 | : ide_pc_intr), | |
60c0cd02 | 649 | timeout); |
594c16d8 | 650 | |
2eba0827 BP |
651 | /* Send the actual packet */ |
652 | if ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0) | |
653 | hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len); | |
654 | ||
594c16d8 | 655 | /* Begin DMA, if necessary */ |
b16aabc9 BP |
656 | if (dev_is_idecd(drive)) { |
657 | if (drive->dma) | |
658 | hwif->dma_ops->dma_start(drive); | |
659 | } else { | |
660 | if (pc->flags & PC_FLAG_DMA_OK) { | |
661 | pc->flags |= PC_FLAG_DMA_IN_PROGRESS; | |
662 | hwif->dma_ops->dma_start(drive); | |
663 | } | |
594c16d8 BZ |
664 | } |
665 | ||
594c16d8 BZ |
666 | return ide_started; |
667 | } | |
6bf1641c | 668 | |
b788ee9c | 669 | ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_cmd *cmd) |
6bf1641c | 670 | { |
d77612ab | 671 | struct ide_atapi_pc *pc; |
6bf1641c | 672 | ide_hwif_t *hwif = drive->hwif; |
4cad085e | 673 | ide_expiry_t *expiry = NULL; |
e6830a86 | 674 | struct request *rq = hwif->rq; |
dfb7e621 | 675 | unsigned int timeout, bytes; |
392de1d5 | 676 | u16 bcount; |
60f85019 | 677 | u8 valid_tf; |
35b5d0be | 678 | u8 drq_int = !!(drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT); |
6bf1641c | 679 | |
ed48554f | 680 | if (dev_is_idecd(drive)) { |
60f85019 | 681 | valid_tf = IDE_VALID_NSECT | IDE_VALID_LBAL; |
e6830a86 | 682 | bcount = ide_cd_get_xferlen(rq); |
4cad085e | 683 | expiry = ide_cd_expiry; |
28ad91db | 684 | timeout = ATAPI_WAIT_PC; |
d77612ab | 685 | |
5ae5412d BZ |
686 | if (drive->dma) |
687 | drive->dma = !ide_dma_prepare(drive, cmd); | |
ed48554f | 688 | } else { |
d77612ab BP |
689 | pc = drive->pc; |
690 | ||
60f85019 | 691 | valid_tf = IDE_VALID_DEVICE; |
dfb7e621 | 692 | bytes = blk_rq_bytes(rq); |
dfb7e621 BP |
693 | bcount = ((drive->media == ide_tape) ? bytes |
694 | : min_t(unsigned int, | |
695 | bytes, 63 * 1024)); | |
6bf1641c | 696 | |
077e6dba BP |
697 | /* We haven't transferred any data yet */ |
698 | rq->resid_len = bcount; | |
6bf1641c | 699 | |
d77612ab BP |
700 | if (pc->flags & PC_FLAG_DMA_ERROR) { |
701 | pc->flags &= ~PC_FLAG_DMA_ERROR; | |
702 | ide_dma_off(drive); | |
703 | } | |
6bf1641c | 704 | |
5ae5412d BZ |
705 | if (pc->flags & PC_FLAG_DMA_OK) |
706 | drive->dma = !ide_dma_prepare(drive, cmd); | |
6bf1641c | 707 | |
d77612ab BP |
708 | if (!drive->dma) |
709 | pc->flags &= ~PC_FLAG_DMA_OK; | |
28ad91db BP |
710 | |
711 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD | |
712 | : WAIT_TAPE_CMD; | |
d77612ab | 713 | } |
6bf1641c | 714 | |
60f85019 | 715 | ide_init_packet_cmd(cmd, valid_tf, bcount, drive->dma); |
b788ee9c BZ |
716 | |
717 | (void)do_rw_taskfile(drive, cmd); | |
6bf1641c | 718 | |
35b5d0be | 719 | if (drq_int) { |
5f25843f BP |
720 | if (drive->dma) |
721 | drive->waiting_for_dma = 0; | |
22117d6e | 722 | hwif->expiry = expiry; |
6bf1641c | 723 | } |
35b5d0be BZ |
724 | |
725 | ide_execute_command(drive, cmd, ide_transfer_pc, timeout); | |
726 | ||
727 | return drq_int ? ide_started : ide_transfer_pc(drive); | |
6bf1641c BZ |
728 | } |
729 | EXPORT_SYMBOL_GPL(ide_issue_pc); |