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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); |
82ed4db4 | 96 | scsi_req_init(rq); |
4f8c9510 | 97 | rq->cmd_type = REQ_TYPE_DRV_PRIV; |
2f5a8e80 | 98 | ide_req(rq)->type = ATA_PRIV_MISC; |
c267cc1c | 99 | rq->special = (char *)pc; |
3eb76c1c | 100 | |
b13345f3 BP |
101 | if (buf && bufflen) { |
102 | error = blk_rq_map_kern(drive->queue, rq, buf, bufflen, | |
5c4be572 TH |
103 | GFP_NOIO); |
104 | if (error) | |
105 | goto put_req; | |
3eb76c1c BP |
106 | } |
107 | ||
82ed4db4 | 108 | memcpy(scsi_req(rq)->cmd, pc->c, 12); |
2ac07d92 | 109 | if (drive->media == ide_tape) |
82ed4db4 | 110 | scsi_req(rq)->cmd[13] = REQ_IDETAPE_PC1; |
2ac07d92 | 111 | error = blk_execute_rq(drive->queue, disk, rq, 0); |
5c4be572 | 112 | put_req: |
2ac07d92 | 113 | blk_put_request(rq); |
2ac07d92 BZ |
114 | return error; |
115 | } | |
116 | EXPORT_SYMBOL_GPL(ide_queue_pc_tail); | |
117 | ||
de699ad5 BZ |
118 | int ide_do_test_unit_ready(ide_drive_t *drive, struct gendisk *disk) |
119 | { | |
120 | struct ide_atapi_pc pc; | |
121 | ||
122 | ide_init_pc(&pc); | |
123 | pc.c[0] = TEST_UNIT_READY; | |
124 | ||
b13345f3 | 125 | return ide_queue_pc_tail(drive, disk, &pc, NULL, 0); |
de699ad5 BZ |
126 | } |
127 | EXPORT_SYMBOL_GPL(ide_do_test_unit_ready); | |
128 | ||
0c8a6c7a BZ |
129 | int ide_do_start_stop(ide_drive_t *drive, struct gendisk *disk, int start) |
130 | { | |
131 | struct ide_atapi_pc pc; | |
132 | ||
133 | ide_init_pc(&pc); | |
134 | pc.c[0] = START_STOP; | |
135 | pc.c[4] = start; | |
136 | ||
137 | if (drive->media == ide_tape) | |
138 | pc.flags |= PC_FLAG_WAIT_FOR_DSC; | |
139 | ||
b13345f3 | 140 | return ide_queue_pc_tail(drive, disk, &pc, NULL, 0); |
0c8a6c7a BZ |
141 | } |
142 | EXPORT_SYMBOL_GPL(ide_do_start_stop); | |
143 | ||
0578042d BZ |
144 | int ide_set_media_lock(ide_drive_t *drive, struct gendisk *disk, int on) |
145 | { | |
146 | struct ide_atapi_pc pc; | |
147 | ||
42619d35 | 148 | if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) |
0578042d BZ |
149 | return 0; |
150 | ||
151 | ide_init_pc(&pc); | |
152 | pc.c[0] = ALLOW_MEDIUM_REMOVAL; | |
153 | pc.c[4] = on; | |
154 | ||
b13345f3 | 155 | return ide_queue_pc_tail(drive, disk, &pc, NULL, 0); |
0578042d BZ |
156 | } |
157 | EXPORT_SYMBOL_GPL(ide_set_media_lock); | |
158 | ||
6b0da28b BZ |
159 | void ide_create_request_sense_cmd(ide_drive_t *drive, struct ide_atapi_pc *pc) |
160 | { | |
161 | ide_init_pc(pc); | |
162 | pc->c[0] = REQUEST_SENSE; | |
163 | if (drive->media == ide_floppy) { | |
164 | pc->c[4] = 255; | |
165 | pc->req_xfer = 18; | |
166 | } else { | |
167 | pc->c[4] = 20; | |
168 | pc->req_xfer = 20; | |
169 | } | |
170 | } | |
171 | EXPORT_SYMBOL_GPL(ide_create_request_sense_cmd); | |
172 | ||
a1df5169 BP |
173 | void ide_prep_sense(ide_drive_t *drive, struct request *rq) |
174 | { | |
175 | struct request_sense *sense = &drive->sense_data; | |
82ed4db4 CH |
176 | struct request *sense_rq = drive->sense_rq; |
177 | struct scsi_request *req = scsi_req(sense_rq); | |
a1df5169 | 178 | unsigned int cmd_len, sense_len; |
5c4be572 | 179 | int err; |
a1df5169 | 180 | |
a1df5169 BP |
181 | switch (drive->media) { |
182 | case ide_floppy: | |
183 | cmd_len = 255; | |
184 | sense_len = 18; | |
185 | break; | |
186 | case ide_tape: | |
187 | cmd_len = 20; | |
188 | sense_len = 20; | |
189 | break; | |
190 | default: | |
191 | cmd_len = 18; | |
192 | sense_len = 18; | |
193 | } | |
194 | ||
195 | BUG_ON(sense_len > sizeof(*sense)); | |
196 | ||
2f5a8e80 | 197 | if (ata_sense_request(rq) || drive->sense_rq_armed) |
a1df5169 BP |
198 | return; |
199 | ||
200 | memset(sense, 0, sizeof(*sense)); | |
201 | ||
202 | blk_rq_init(rq->q, sense_rq); | |
82ed4db4 | 203 | scsi_req_init(sense_rq); |
a1df5169 | 204 | |
5c4be572 TH |
205 | err = blk_rq_map_kern(drive->queue, sense_rq, sense, sense_len, |
206 | GFP_NOIO); | |
207 | if (unlikely(err)) { | |
208 | if (printk_ratelimit()) | |
103f7033 BP |
209 | printk(KERN_WARNING PFX "%s: failed to map sense " |
210 | "buffer\n", drive->name); | |
5c4be572 TH |
211 | return; |
212 | } | |
213 | ||
214 | sense_rq->rq_disk = rq->rq_disk; | |
2f5a8e80 CH |
215 | sense_rq->cmd_type = REQ_TYPE_DRV_PRIV; |
216 | ide_req(sense_rq)->type = ATA_PRIV_SENSE; | |
e8064021 | 217 | sense_rq->rq_flags |= RQF_PREEMPT; |
a1df5169 | 218 | |
82ed4db4 CH |
219 | req->cmd[0] = GPCMD_REQUEST_SENSE; |
220 | req->cmd[4] = cmd_len; | |
a1df5169 | 221 | if (drive->media == ide_tape) |
82ed4db4 | 222 | req->cmd[13] = REQ_IDETAPE_PC1; |
a1df5169 BP |
223 | |
224 | drive->sense_rq_armed = true; | |
225 | } | |
226 | EXPORT_SYMBOL_GPL(ide_prep_sense); | |
227 | ||
5c4be572 | 228 | int ide_queue_sense_rq(ide_drive_t *drive, void *special) |
a1df5169 | 229 | { |
5c4be572 TH |
230 | /* deferred failure from ide_prep_sense() */ |
231 | if (!drive->sense_rq_armed) { | |
103f7033 | 232 | printk(KERN_WARNING PFX "%s: error queuing a sense request\n", |
5c4be572 TH |
233 | drive->name); |
234 | return -ENOMEM; | |
235 | } | |
a1df5169 | 236 | |
82ed4db4 | 237 | drive->sense_rq->special = special; |
a1df5169 BP |
238 | drive->sense_rq_armed = false; |
239 | ||
240 | drive->hwif->rq = NULL; | |
241 | ||
82ed4db4 | 242 | elv_add_request(drive->queue, drive->sense_rq, ELEVATOR_INSERT_FRONT); |
5c4be572 | 243 | return 0; |
a1df5169 BP |
244 | } |
245 | EXPORT_SYMBOL_GPL(ide_queue_sense_rq); | |
246 | ||
6b0da28b BZ |
247 | /* |
248 | * Called when an error was detected during the last packet command. | |
6b544fcc BP |
249 | * We queue a request sense packet command at the head of the request |
250 | * queue. | |
6b0da28b | 251 | */ |
6b544fcc | 252 | void ide_retry_pc(ide_drive_t *drive) |
6b0da28b | 253 | { |
8f6205cd | 254 | struct request *failed_rq = drive->hwif->rq; |
82ed4db4 | 255 | struct request *sense_rq = drive->sense_rq; |
6b0da28b BZ |
256 | struct ide_atapi_pc *pc = &drive->request_sense_pc; |
257 | ||
258 | (void)ide_read_error(drive); | |
6b544fcc BP |
259 | |
260 | /* init pc from sense_rq */ | |
261 | ide_init_pc(pc); | |
82ed4db4 | 262 | memcpy(pc->c, scsi_req(sense_rq)->cmd, 12); |
6b544fcc | 263 | |
6b0da28b | 264 | if (drive->media == ide_tape) |
626542ca | 265 | drive->atapi_flags |= IDE_AFLAG_IGNORE_DSC; |
6b544fcc | 266 | |
8f6205cd TH |
267 | /* |
268 | * Push back the failed request and put request sense on top | |
269 | * of it. The failed command will be retried after sense data | |
270 | * is acquired. | |
271 | */ | |
8f6205cd | 272 | drive->hwif->rq = NULL; |
1af18503 | 273 | ide_requeue_and_plug(drive, failed_rq); |
8f6205cd | 274 | if (ide_queue_sense_rq(drive, pc)) { |
9934c8c0 | 275 | blk_start_request(failed_rq); |
8f6205cd TH |
276 | ide_complete_rq(drive, -EIO, blk_rq_bytes(failed_rq)); |
277 | } | |
6b0da28b BZ |
278 | } |
279 | EXPORT_SYMBOL_GPL(ide_retry_pc); | |
280 | ||
4cad085e BP |
281 | int ide_cd_expiry(ide_drive_t *drive) |
282 | { | |
b65fac32 | 283 | struct request *rq = drive->hwif->rq; |
4cad085e BP |
284 | unsigned long wait = 0; |
285 | ||
286 | debug_log("%s: rq->cmd[0]: 0x%x\n", __func__, rq->cmd[0]); | |
287 | ||
288 | /* | |
289 | * Some commands are *slow* and normally take a long time to complete. | |
290 | * Usually we can use the ATAPI "disconnect" to bypass this, but not all | |
291 | * commands/drives support that. Let ide_timer_expiry keep polling us | |
292 | * for these. | |
293 | */ | |
82ed4db4 | 294 | switch (scsi_req(rq)->cmd[0]) { |
4cad085e BP |
295 | case GPCMD_BLANK: |
296 | case GPCMD_FORMAT_UNIT: | |
297 | case GPCMD_RESERVE_RZONE_TRACK: | |
298 | case GPCMD_CLOSE_TRACK: | |
299 | case GPCMD_FLUSH_CACHE: | |
300 | wait = ATAPI_WAIT_PC; | |
301 | break; | |
302 | default: | |
e8064021 | 303 | if (!(rq->rq_flags & RQF_QUIET)) |
103f7033 | 304 | printk(KERN_INFO PFX "cmd 0x%x timed out\n", |
82ed4db4 | 305 | scsi_req(rq)->cmd[0]); |
4cad085e BP |
306 | wait = 0; |
307 | break; | |
308 | } | |
309 | return wait; | |
310 | } | |
311 | EXPORT_SYMBOL_GPL(ide_cd_expiry); | |
312 | ||
392de1d5 BP |
313 | int ide_cd_get_xferlen(struct request *rq) |
314 | { | |
4c4762d1 | 315 | switch (rq->cmd_type) { |
33659ebb | 316 | case REQ_TYPE_FS: |
392de1d5 | 317 | return 32768; |
33659ebb | 318 | case REQ_TYPE_BLOCK_PC: |
34b7d2c9 | 319 | return blk_rq_bytes(rq); |
2f5a8e80 CH |
320 | case REQ_TYPE_DRV_PRIV: |
321 | switch (ide_req(rq)->type) { | |
322 | case ATA_PRIV_PC: | |
323 | case ATA_PRIV_SENSE: | |
324 | return blk_rq_bytes(rq); | |
325 | } | |
33659ebb | 326 | default: |
392de1d5 | 327 | return 0; |
33659ebb | 328 | } |
392de1d5 BP |
329 | } |
330 | EXPORT_SYMBOL_GPL(ide_cd_get_xferlen); | |
331 | ||
0d6a9754 BZ |
332 | void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason) |
333 | { | |
3153c26b | 334 | struct ide_taskfile tf; |
0d6a9754 | 335 | |
3153c26b SS |
336 | drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_NSECT | |
337 | IDE_VALID_LBAM | IDE_VALID_LBAH); | |
0d6a9754 | 338 | |
3153c26b SS |
339 | *bcount = (tf.lbah << 8) | tf.lbam; |
340 | *ireason = tf.nsect & 3; | |
0d6a9754 BZ |
341 | } |
342 | EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason); | |
343 | ||
103f7033 BP |
344 | /* |
345 | * Check the contents of the interrupt reason register and attempt to recover if | |
346 | * there are problems. | |
347 | * | |
348 | * Returns: | |
349 | * - 0 if everything's ok | |
350 | * - 1 if the request has to be terminated. | |
351 | */ | |
352 | int ide_check_ireason(ide_drive_t *drive, struct request *rq, int len, | |
353 | int ireason, int rw) | |
354 | { | |
355 | ide_hwif_t *hwif = drive->hwif; | |
356 | ||
357 | debug_log("ireason: 0x%x, rw: 0x%x\n", ireason, rw); | |
358 | ||
359 | if (ireason == (!rw << 1)) | |
360 | return 0; | |
361 | else if (ireason == (rw << 1)) { | |
362 | printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n", | |
363 | drive->name, __func__); | |
364 | ||
365 | if (dev_is_idecd(drive)) | |
366 | ide_pad_transfer(drive, rw, len); | |
367 | } else if (!rw && ireason == ATAPI_COD) { | |
368 | if (dev_is_idecd(drive)) { | |
369 | /* | |
370 | * Some drives (ASUS) seem to tell us that status info | |
371 | * is available. Just get it and ignore. | |
372 | */ | |
373 | (void)hwif->tp_ops->read_status(hwif); | |
374 | return 0; | |
375 | } | |
376 | } else { | |
377 | if (ireason & ATAPI_COD) | |
378 | printk(KERN_ERR PFX "%s: CoD != 0 in %s\n", drive->name, | |
379 | __func__); | |
380 | ||
381 | /* drive wants a command packet, or invalid ireason... */ | |
382 | printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n", | |
383 | drive->name, __func__, ireason); | |
384 | } | |
385 | ||
2f5a8e80 | 386 | if (dev_is_idecd(drive) && ata_pc_request(rq)) |
e8064021 | 387 | rq->rq_flags |= RQF_FAILED; |
103f7033 BP |
388 | |
389 | return 1; | |
390 | } | |
391 | EXPORT_SYMBOL_GPL(ide_check_ireason); | |
392 | ||
aa5d2de7 BZ |
393 | /* |
394 | * This is the usual interrupt handler which will be called during a packet | |
395 | * command. We will transfer some of the data (as requested by the drive) | |
396 | * and will re-point interrupt handler to us. | |
397 | */ | |
398 | static ide_startstop_t ide_pc_intr(ide_drive_t *drive) | |
646c0cb6 | 399 | { |
2b9efba4 | 400 | struct ide_atapi_pc *pc = drive->pc; |
646c0cb6 | 401 | ide_hwif_t *hwif = drive->hwif; |
f094d4d8 | 402 | struct ide_cmd *cmd = &hwif->cmd; |
b65fac32 | 403 | struct request *rq = hwif->rq; |
374e042c | 404 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
d93bc452 | 405 | unsigned int timeout, done; |
646c0cb6 | 406 | u16 bcount; |
5d655a03 | 407 | u8 stat, ireason, dsc = 0; |
d93bc452 | 408 | u8 write = !!(pc->flags & PC_FLAG_WRITING); |
646c0cb6 BZ |
409 | |
410 | debug_log("Enter %s - interrupt handler\n", __func__); | |
411 | ||
5d655a03 BP |
412 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD |
413 | : WAIT_TAPE_CMD; | |
844b9468 | 414 | |
646c0cb6 | 415 | /* Clear the interrupt */ |
374e042c | 416 | stat = tp_ops->read_status(hwif); |
646c0cb6 BZ |
417 | |
418 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
88b4132e | 419 | int rc; |
4453011f | 420 | |
88b4132e BZ |
421 | drive->waiting_for_dma = 0; |
422 | rc = hwif->dma_ops->dma_end(drive); | |
f094d4d8 | 423 | ide_dma_unmap_sg(drive, cmd); |
4453011f BZ |
424 | |
425 | if (rc || (drive->media == ide_tape && (stat & ATA_ERR))) { | |
5d655a03 | 426 | if (drive->media == ide_floppy) |
103f7033 | 427 | printk(KERN_ERR PFX "%s: DMA %s error\n", |
646c0cb6 BZ |
428 | drive->name, rq_data_dir(pc->rq) |
429 | ? "write" : "read"); | |
430 | pc->flags |= PC_FLAG_DMA_ERROR; | |
6d700387 | 431 | } else |
82ed4db4 | 432 | scsi_req(rq)->resid_len = 0; |
646c0cb6 BZ |
433 | debug_log("%s: DMA finished\n", drive->name); |
434 | } | |
435 | ||
436 | /* No more interrupts */ | |
3a7d2484 | 437 | if ((stat & ATA_DRQ) == 0) { |
5b6c942d | 438 | int uptodate, error; |
03a2faae | 439 | |
646c0cb6 | 440 | debug_log("Packet command completed, %d bytes transferred\n", |
077e6dba | 441 | blk_rq_bytes(rq)); |
646c0cb6 BZ |
442 | |
443 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
444 | ||
445 | local_irq_enable_in_hardirq(); | |
446 | ||
5d655a03 | 447 | if (drive->media == ide_tape && |
82ed4db4 | 448 | (stat & ATA_ERR) && scsi_req(rq)->cmd[0] == REQUEST_SENSE) |
3a7d2484 | 449 | stat &= ~ATA_ERR; |
8fccf899 | 450 | |
3a7d2484 | 451 | if ((stat & ATA_ERR) || (pc->flags & PC_FLAG_DMA_ERROR)) { |
646c0cb6 BZ |
452 | /* Error detected */ |
453 | debug_log("%s: I/O error\n", drive->name); | |
454 | ||
5d655a03 | 455 | if (drive->media != ide_tape) |
646c0cb6 | 456 | pc->rq->errors++; |
646c0cb6 | 457 | |
82ed4db4 | 458 | if (scsi_req(rq)->cmd[0] == REQUEST_SENSE) { |
103f7033 BP |
459 | printk(KERN_ERR PFX "%s: I/O error in request " |
460 | "sense command\n", drive->name); | |
646c0cb6 BZ |
461 | return ide_do_reset(drive); |
462 | } | |
463 | ||
8fccf899 | 464 | debug_log("[cmd %x]: check condition\n", rq->cmd[0]); |
646c0cb6 BZ |
465 | |
466 | /* Retry operation */ | |
6b544fcc | 467 | ide_retry_pc(drive); |
8fccf899 | 468 | |
646c0cb6 BZ |
469 | /* queued, but not started */ |
470 | return ide_stopped; | |
471 | } | |
646c0cb6 | 472 | pc->error = 0; |
b14c7212 BZ |
473 | |
474 | if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) && (stat & ATA_DSC) == 0) | |
475 | dsc = 1; | |
8fccf899 | 476 | |
b3071d19 TH |
477 | /* |
478 | * ->pc_callback() might change rq->data_len for | |
479 | * residual count, cache total length. | |
480 | */ | |
21d9c5d2 | 481 | done = blk_rq_bytes(rq); |
b3071d19 | 482 | |
646c0cb6 | 483 | /* Command finished - Call the callback function */ |
03a2faae BZ |
484 | uptodate = drive->pc_callback(drive, dsc); |
485 | ||
486 | if (uptodate == 0) | |
487 | drive->failed_pc = NULL; | |
488 | ||
2f5a8e80 | 489 | if (ata_misc_request(rq)) { |
6902a533 | 490 | rq->errors = 0; |
5b6c942d | 491 | error = 0; |
89f78b32 | 492 | } else { |
349d12a1 | 493 | |
4c4762d1 | 494 | if (rq->cmd_type != REQ_TYPE_FS && uptodate <= 0) { |
89f78b32 BZ |
495 | if (rq->errors == 0) |
496 | rq->errors = -EIO; | |
497 | } | |
349d12a1 | 498 | |
5b6c942d | 499 | error = uptodate ? 0 : -EIO; |
89f78b32 | 500 | } |
8fccf899 | 501 | |
c3a4d78c | 502 | ide_complete_rq(drive, error, blk_rq_bytes(rq)); |
646c0cb6 BZ |
503 | return ide_stopped; |
504 | } | |
505 | ||
506 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
507 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
103f7033 BP |
508 | printk(KERN_ERR PFX "%s: The device wants to issue more " |
509 | "interrupts in DMA mode\n", drive->name); | |
646c0cb6 BZ |
510 | ide_dma_off(drive); |
511 | return ide_do_reset(drive); | |
512 | } | |
646c0cb6 | 513 | |
1823649b BZ |
514 | /* Get the number of bytes to transfer on this interrupt. */ |
515 | ide_read_bcount_and_ireason(drive, &bcount, &ireason); | |
646c0cb6 | 516 | |
103f7033 | 517 | if (ide_check_ireason(drive, rq, bcount, ireason, write)) |
646c0cb6 | 518 | return ide_do_reset(drive); |
8fccf899 | 519 | |
6d700387 TH |
520 | done = min_t(unsigned int, bcount, cmd->nleft); |
521 | ide_pio_bytes(drive, cmd, write, done); | |
646c0cb6 | 522 | |
6d700387 | 523 | /* Update transferred byte count */ |
82ed4db4 | 524 | scsi_req(rq)->resid_len -= done; |
d93bc452 BZ |
525 | |
526 | bcount -= done; | |
527 | ||
528 | if (bcount) | |
529 | ide_pad_transfer(drive, write, bcount); | |
530 | ||
077e6dba | 531 | debug_log("[cmd %x] transferred %d bytes, padded %d bytes, resid: %u\n", |
82ed4db4 | 532 | rq->cmd[0], done, bcount, scsi_req(rq)->resid_len); |
646c0cb6 | 533 | |
646c0cb6 | 534 | /* And set the interrupt handler again */ |
60c0cd02 | 535 | ide_set_handler(drive, ide_pc_intr, timeout); |
646c0cb6 BZ |
536 | return ide_started; |
537 | } | |
594c16d8 | 538 | |
60f85019 | 539 | static void ide_init_packet_cmd(struct ide_cmd *cmd, u8 valid_tf, |
b788ee9c | 540 | u16 bcount, u8 dma) |
7a254df0 | 541 | { |
60f85019 SS |
542 | cmd->protocol = dma ? ATAPI_PROT_DMA : ATAPI_PROT_PIO; |
543 | cmd->valid.out.tf = IDE_VALID_LBAH | IDE_VALID_LBAM | | |
544 | IDE_VALID_FEATURE | valid_tf; | |
35b5d0be | 545 | cmd->tf.command = ATA_CMD_PACKET; |
b788ee9c BZ |
546 | cmd->tf.feature = dma; /* Use PIO/DMA */ |
547 | cmd->tf.lbam = bcount & 0xff; | |
548 | cmd->tf.lbah = (bcount >> 8) & 0xff; | |
7a254df0 BZ |
549 | } |
550 | ||
88a72109 BZ |
551 | static u8 ide_read_ireason(ide_drive_t *drive) |
552 | { | |
3153c26b | 553 | struct ide_taskfile tf; |
88a72109 | 554 | |
3153c26b | 555 | drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_NSECT); |
88a72109 | 556 | |
3153c26b | 557 | return tf.nsect & 3; |
88a72109 BZ |
558 | } |
559 | ||
594c16d8 BZ |
560 | static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason) |
561 | { | |
594c16d8 BZ |
562 | int retries = 100; |
563 | ||
3a7d2484 BZ |
564 | while (retries-- && ((ireason & ATAPI_COD) == 0 || |
565 | (ireason & ATAPI_IO))) { | |
103f7033 | 566 | printk(KERN_ERR PFX "%s: (IO,CoD != (0,1) while issuing " |
594c16d8 BZ |
567 | "a packet command, retrying\n", drive->name); |
568 | udelay(100); | |
88a72109 | 569 | ireason = ide_read_ireason(drive); |
594c16d8 | 570 | if (retries == 0) { |
103f7033 BP |
571 | printk(KERN_ERR PFX "%s: (IO,CoD != (0,1) while issuing" |
572 | " a packet command, ignoring\n", | |
594c16d8 | 573 | drive->name); |
3a7d2484 BZ |
574 | ireason |= ATAPI_COD; |
575 | ireason &= ~ATAPI_IO; | |
594c16d8 BZ |
576 | } |
577 | } | |
578 | ||
579 | return ireason; | |
580 | } | |
581 | ||
baf08f0b BZ |
582 | static int ide_delayed_transfer_pc(ide_drive_t *drive) |
583 | { | |
584 | /* Send the actual packet */ | |
585 | drive->hwif->tp_ops->output_data(drive, NULL, drive->pc->c, 12); | |
586 | ||
587 | /* Timeout for the packet command */ | |
588 | return WAIT_FLOPPY_CMD; | |
589 | } | |
590 | ||
591 | static ide_startstop_t ide_transfer_pc(ide_drive_t *drive) | |
594c16d8 | 592 | { |
b16aabc9 | 593 | struct ide_atapi_pc *uninitialized_var(pc); |
594c16d8 | 594 | ide_hwif_t *hwif = drive->hwif; |
b65fac32 | 595 | struct request *rq = hwif->rq; |
baf08f0b BZ |
596 | ide_expiry_t *expiry; |
597 | unsigned int timeout; | |
8c662852 | 598 | int cmd_len; |
594c16d8 BZ |
599 | ide_startstop_t startstop; |
600 | u8 ireason; | |
601 | ||
3a7d2484 | 602 | if (ide_wait_stat(&startstop, drive, ATA_DRQ, ATA_BUSY, WAIT_READY)) { |
103f7033 | 603 | printk(KERN_ERR PFX "%s: Strange, packet command initiated yet " |
594c16d8 BZ |
604 | "DRQ isn't asserted\n", drive->name); |
605 | return startstop; | |
606 | } | |
607 | ||
5f25843f BP |
608 | if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { |
609 | if (drive->dma) | |
610 | drive->waiting_for_dma = 1; | |
611 | } | |
612 | ||
8c662852 BP |
613 | if (dev_is_idecd(drive)) { |
614 | /* ATAPI commands get padded out to 12 bytes minimum */ | |
82ed4db4 | 615 | cmd_len = COMMAND_SIZE(scsi_req(rq)->cmd[0]); |
8c662852 BP |
616 | if (cmd_len < ATAPI_MIN_CDB_BYTES) |
617 | cmd_len = ATAPI_MIN_CDB_BYTES; | |
8c662852 | 618 | |
def860d0 BP |
619 | timeout = rq->timeout; |
620 | expiry = ide_cd_expiry; | |
baf08f0b | 621 | } else { |
b16aabc9 BP |
622 | pc = drive->pc; |
623 | ||
def860d0 BP |
624 | cmd_len = ATAPI_MIN_CDB_BYTES; |
625 | ||
626 | /* | |
627 | * If necessary schedule the packet transfer to occur 'timeout' | |
19af5cdb | 628 | * milliseconds later in ide_delayed_transfer_pc() after the |
def860d0 BP |
629 | * device says it's ready for a packet. |
630 | */ | |
631 | if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) { | |
632 | timeout = drive->pc_delay; | |
633 | expiry = &ide_delayed_transfer_pc; | |
634 | } else { | |
635 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD | |
636 | : WAIT_TAPE_CMD; | |
637 | expiry = NULL; | |
638 | } | |
06cc2778 BP |
639 | |
640 | ireason = ide_read_ireason(drive); | |
641 | if (drive->media == ide_tape) | |
642 | ireason = ide_wait_ireason(drive, ireason); | |
643 | ||
644 | if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_IO)) { | |
103f7033 BP |
645 | printk(KERN_ERR PFX "%s: (IO,CoD) != (0,1) while " |
646 | "issuing a packet command\n", drive->name); | |
06cc2778 BP |
647 | |
648 | return ide_do_reset(drive); | |
649 | } | |
baf08f0b BZ |
650 | } |
651 | ||
60c0cd02 BZ |
652 | hwif->expiry = expiry; |
653 | ||
594c16d8 | 654 | /* Set the interrupt routine */ |
d6251d44 BP |
655 | ide_set_handler(drive, |
656 | (dev_is_idecd(drive) ? drive->irq_handler | |
657 | : ide_pc_intr), | |
60c0cd02 | 658 | timeout); |
594c16d8 | 659 | |
2eba0827 BP |
660 | /* Send the actual packet */ |
661 | if ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0) | |
82ed4db4 | 662 | hwif->tp_ops->output_data(drive, NULL, scsi_req(rq)->cmd, cmd_len); |
2eba0827 | 663 | |
594c16d8 | 664 | /* Begin DMA, if necessary */ |
b16aabc9 BP |
665 | if (dev_is_idecd(drive)) { |
666 | if (drive->dma) | |
667 | hwif->dma_ops->dma_start(drive); | |
668 | } else { | |
669 | if (pc->flags & PC_FLAG_DMA_OK) { | |
670 | pc->flags |= PC_FLAG_DMA_IN_PROGRESS; | |
671 | hwif->dma_ops->dma_start(drive); | |
672 | } | |
594c16d8 BZ |
673 | } |
674 | ||
594c16d8 BZ |
675 | return ide_started; |
676 | } | |
6bf1641c | 677 | |
b788ee9c | 678 | ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_cmd *cmd) |
6bf1641c | 679 | { |
d77612ab | 680 | struct ide_atapi_pc *pc; |
6bf1641c | 681 | ide_hwif_t *hwif = drive->hwif; |
4cad085e | 682 | ide_expiry_t *expiry = NULL; |
e6830a86 | 683 | struct request *rq = hwif->rq; |
dfb7e621 | 684 | unsigned int timeout, bytes; |
392de1d5 | 685 | u16 bcount; |
60f85019 | 686 | u8 valid_tf; |
35b5d0be | 687 | u8 drq_int = !!(drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT); |
6bf1641c | 688 | |
ed48554f | 689 | if (dev_is_idecd(drive)) { |
60f85019 | 690 | valid_tf = IDE_VALID_NSECT | IDE_VALID_LBAL; |
e6830a86 | 691 | bcount = ide_cd_get_xferlen(rq); |
4cad085e | 692 | expiry = ide_cd_expiry; |
28ad91db | 693 | timeout = ATAPI_WAIT_PC; |
d77612ab | 694 | |
5ae5412d BZ |
695 | if (drive->dma) |
696 | drive->dma = !ide_dma_prepare(drive, cmd); | |
ed48554f | 697 | } else { |
d77612ab BP |
698 | pc = drive->pc; |
699 | ||
60f85019 | 700 | valid_tf = IDE_VALID_DEVICE; |
dfb7e621 | 701 | bytes = blk_rq_bytes(rq); |
dfb7e621 BP |
702 | bcount = ((drive->media == ide_tape) ? bytes |
703 | : min_t(unsigned int, | |
704 | bytes, 63 * 1024)); | |
6bf1641c | 705 | |
077e6dba | 706 | /* We haven't transferred any data yet */ |
82ed4db4 | 707 | scsi_req(rq)->resid_len = bcount; |
6bf1641c | 708 | |
d77612ab BP |
709 | if (pc->flags & PC_FLAG_DMA_ERROR) { |
710 | pc->flags &= ~PC_FLAG_DMA_ERROR; | |
711 | ide_dma_off(drive); | |
712 | } | |
6bf1641c | 713 | |
5ae5412d BZ |
714 | if (pc->flags & PC_FLAG_DMA_OK) |
715 | drive->dma = !ide_dma_prepare(drive, cmd); | |
6bf1641c | 716 | |
d77612ab BP |
717 | if (!drive->dma) |
718 | pc->flags &= ~PC_FLAG_DMA_OK; | |
28ad91db BP |
719 | |
720 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD | |
721 | : WAIT_TAPE_CMD; | |
d77612ab | 722 | } |
6bf1641c | 723 | |
60f85019 | 724 | ide_init_packet_cmd(cmd, valid_tf, bcount, drive->dma); |
b788ee9c BZ |
725 | |
726 | (void)do_rw_taskfile(drive, cmd); | |
6bf1641c | 727 | |
35b5d0be | 728 | if (drq_int) { |
5f25843f BP |
729 | if (drive->dma) |
730 | drive->waiting_for_dma = 0; | |
22117d6e | 731 | hwif->expiry = expiry; |
6bf1641c | 732 | } |
35b5d0be BZ |
733 | |
734 | ide_execute_command(drive, cmd, ide_transfer_pc, timeout); | |
735 | ||
736 | return drq_int ? ide_started : ide_transfer_pc(drive); | |
6bf1641c BZ |
737 | } |
738 | EXPORT_SYMBOL_GPL(ide_issue_pc); |