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 | ||
ff005a06 | 95 | rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, 0); |
2f5a8e80 | 96 | ide_req(rq)->type = ATA_PRIV_MISC; |
22ce0a7c | 97 | ide_req(rq)->special = 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 | ||
82ed4db4 | 106 | memcpy(scsi_req(rq)->cmd, pc->c, 12); |
2ac07d92 | 107 | if (drive->media == ide_tape) |
82ed4db4 | 108 | scsi_req(rq)->cmd[13] = REQ_IDETAPE_PC1; |
b7819b92 | 109 | blk_execute_rq(drive->queue, disk, rq, 0); |
17d5363b | 110 | error = scsi_req(rq)->result ? -EIO : 0; |
5c4be572 | 111 | put_req: |
2ac07d92 | 112 | blk_put_request(rq); |
2ac07d92 BZ |
113 | return error; |
114 | } | |
115 | EXPORT_SYMBOL_GPL(ide_queue_pc_tail); | |
116 | ||
de699ad5 BZ |
117 | int ide_do_test_unit_ready(ide_drive_t *drive, struct gendisk *disk) |
118 | { | |
119 | struct ide_atapi_pc pc; | |
120 | ||
121 | ide_init_pc(&pc); | |
122 | pc.c[0] = TEST_UNIT_READY; | |
123 | ||
b13345f3 | 124 | return ide_queue_pc_tail(drive, disk, &pc, NULL, 0); |
de699ad5 BZ |
125 | } |
126 | EXPORT_SYMBOL_GPL(ide_do_test_unit_ready); | |
127 | ||
0c8a6c7a BZ |
128 | int ide_do_start_stop(ide_drive_t *drive, struct gendisk *disk, int start) |
129 | { | |
130 | struct ide_atapi_pc pc; | |
131 | ||
132 | ide_init_pc(&pc); | |
133 | pc.c[0] = START_STOP; | |
134 | pc.c[4] = start; | |
135 | ||
136 | if (drive->media == ide_tape) | |
137 | pc.flags |= PC_FLAG_WAIT_FOR_DSC; | |
138 | ||
b13345f3 | 139 | return ide_queue_pc_tail(drive, disk, &pc, NULL, 0); |
0c8a6c7a BZ |
140 | } |
141 | EXPORT_SYMBOL_GPL(ide_do_start_stop); | |
142 | ||
0578042d BZ |
143 | int ide_set_media_lock(ide_drive_t *drive, struct gendisk *disk, int on) |
144 | { | |
145 | struct ide_atapi_pc pc; | |
146 | ||
42619d35 | 147 | if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) |
0578042d BZ |
148 | return 0; |
149 | ||
150 | ide_init_pc(&pc); | |
151 | pc.c[0] = ALLOW_MEDIUM_REMOVAL; | |
152 | pc.c[4] = on; | |
153 | ||
b13345f3 | 154 | return ide_queue_pc_tail(drive, disk, &pc, NULL, 0); |
0578042d BZ |
155 | } |
156 | EXPORT_SYMBOL_GPL(ide_set_media_lock); | |
157 | ||
6b0da28b BZ |
158 | void ide_create_request_sense_cmd(ide_drive_t *drive, struct ide_atapi_pc *pc) |
159 | { | |
160 | ide_init_pc(pc); | |
161 | pc->c[0] = REQUEST_SENSE; | |
162 | if (drive->media == ide_floppy) { | |
163 | pc->c[4] = 255; | |
164 | pc->req_xfer = 18; | |
165 | } else { | |
166 | pc->c[4] = 20; | |
167 | pc->req_xfer = 20; | |
168 | } | |
169 | } | |
170 | EXPORT_SYMBOL_GPL(ide_create_request_sense_cmd); | |
171 | ||
a1df5169 BP |
172 | void ide_prep_sense(ide_drive_t *drive, struct request *rq) |
173 | { | |
174 | struct request_sense *sense = &drive->sense_data; | |
60033520 JA |
175 | struct request *sense_rq; |
176 | struct scsi_request *req; | |
a1df5169 | 177 | unsigned int cmd_len, sense_len; |
5c4be572 | 178 | int err; |
a1df5169 | 179 | |
a1df5169 BP |
180 | switch (drive->media) { |
181 | case ide_floppy: | |
182 | cmd_len = 255; | |
183 | sense_len = 18; | |
184 | break; | |
185 | case ide_tape: | |
186 | cmd_len = 20; | |
187 | sense_len = 20; | |
188 | break; | |
189 | default: | |
190 | cmd_len = 18; | |
191 | sense_len = 18; | |
192 | } | |
193 | ||
194 | BUG_ON(sense_len > sizeof(*sense)); | |
195 | ||
2f5a8e80 | 196 | if (ata_sense_request(rq) || drive->sense_rq_armed) |
a1df5169 BP |
197 | return; |
198 | ||
60033520 JA |
199 | sense_rq = drive->sense_rq; |
200 | if (!sense_rq) { | |
201 | sense_rq = blk_mq_alloc_request(drive->queue, REQ_OP_DRV_IN, | |
202 | BLK_MQ_REQ_RESERVED | BLK_MQ_REQ_NOWAIT); | |
203 | drive->sense_rq = sense_rq; | |
204 | } | |
205 | req = scsi_req(sense_rq); | |
206 | ||
a1df5169 BP |
207 | memset(sense, 0, sizeof(*sense)); |
208 | ||
c8d9cf22 | 209 | scsi_req_init(req); |
a1df5169 | 210 | |
5c4be572 TH |
211 | err = blk_rq_map_kern(drive->queue, sense_rq, sense, sense_len, |
212 | GFP_NOIO); | |
213 | if (unlikely(err)) { | |
214 | if (printk_ratelimit()) | |
103f7033 BP |
215 | printk(KERN_WARNING PFX "%s: failed to map sense " |
216 | "buffer\n", drive->name); | |
60033520 JA |
217 | blk_mq_free_request(sense_rq); |
218 | drive->sense_rq = NULL; | |
5c4be572 TH |
219 | return; |
220 | } | |
221 | ||
222 | sense_rq->rq_disk = rq->rq_disk; | |
aebf526b | 223 | sense_rq->cmd_flags = REQ_OP_DRV_IN; |
2f5a8e80 | 224 | ide_req(sense_rq)->type = ATA_PRIV_SENSE; |
e8064021 | 225 | sense_rq->rq_flags |= RQF_PREEMPT; |
a1df5169 | 226 | |
82ed4db4 CH |
227 | req->cmd[0] = GPCMD_REQUEST_SENSE; |
228 | req->cmd[4] = cmd_len; | |
a1df5169 | 229 | if (drive->media == ide_tape) |
82ed4db4 | 230 | req->cmd[13] = REQ_IDETAPE_PC1; |
a1df5169 BP |
231 | |
232 | drive->sense_rq_armed = true; | |
233 | } | |
234 | EXPORT_SYMBOL_GPL(ide_prep_sense); | |
235 | ||
5c4be572 | 236 | int ide_queue_sense_rq(ide_drive_t *drive, void *special) |
a1df5169 | 237 | { |
60033520 JA |
238 | struct request *sense_rq = drive->sense_rq; |
239 | ||
5c4be572 TH |
240 | /* deferred failure from ide_prep_sense() */ |
241 | if (!drive->sense_rq_armed) { | |
103f7033 | 242 | printk(KERN_WARNING PFX "%s: error queuing a sense request\n", |
5c4be572 TH |
243 | drive->name); |
244 | return -ENOMEM; | |
245 | } | |
a1df5169 | 246 | |
22ce0a7c | 247 | ide_req(sense_rq)->special = special; |
a1df5169 BP |
248 | drive->sense_rq_armed = false; |
249 | ||
250 | drive->hwif->rq = NULL; | |
251 | ||
60033520 | 252 | ide_insert_request_head(drive, sense_rq); |
5c4be572 | 253 | return 0; |
a1df5169 BP |
254 | } |
255 | EXPORT_SYMBOL_GPL(ide_queue_sense_rq); | |
256 | ||
6b0da28b BZ |
257 | /* |
258 | * Called when an error was detected during the last packet command. | |
6b544fcc BP |
259 | * We queue a request sense packet command at the head of the request |
260 | * queue. | |
6b0da28b | 261 | */ |
6b544fcc | 262 | void ide_retry_pc(ide_drive_t *drive) |
6b0da28b | 263 | { |
8f6205cd | 264 | struct request *failed_rq = drive->hwif->rq; |
82ed4db4 | 265 | struct request *sense_rq = drive->sense_rq; |
6b0da28b BZ |
266 | struct ide_atapi_pc *pc = &drive->request_sense_pc; |
267 | ||
268 | (void)ide_read_error(drive); | |
6b544fcc BP |
269 | |
270 | /* init pc from sense_rq */ | |
271 | ide_init_pc(pc); | |
82ed4db4 | 272 | memcpy(pc->c, scsi_req(sense_rq)->cmd, 12); |
6b544fcc | 273 | |
6b0da28b | 274 | if (drive->media == ide_tape) |
626542ca | 275 | drive->atapi_flags |= IDE_AFLAG_IGNORE_DSC; |
6b544fcc | 276 | |
8f6205cd TH |
277 | /* |
278 | * Push back the failed request and put request sense on top | |
279 | * of it. The failed command will be retried after sense data | |
280 | * is acquired. | |
281 | */ | |
8f6205cd | 282 | drive->hwif->rq = NULL; |
1af18503 | 283 | ide_requeue_and_plug(drive, failed_rq); |
60033520 | 284 | if (ide_queue_sense_rq(drive, pc)) |
2a842aca | 285 | ide_complete_rq(drive, BLK_STS_IOERR, blk_rq_bytes(failed_rq)); |
6b0da28b BZ |
286 | } |
287 | EXPORT_SYMBOL_GPL(ide_retry_pc); | |
288 | ||
4cad085e BP |
289 | int ide_cd_expiry(ide_drive_t *drive) |
290 | { | |
b65fac32 | 291 | struct request *rq = drive->hwif->rq; |
4cad085e BP |
292 | unsigned long wait = 0; |
293 | ||
8dc7a31f | 294 | debug_log("%s: scsi_req(rq)->cmd[0]: 0x%x\n", __func__, scsi_req(rq)->cmd[0]); |
4cad085e BP |
295 | |
296 | /* | |
297 | * Some commands are *slow* and normally take a long time to complete. | |
298 | * Usually we can use the ATAPI "disconnect" to bypass this, but not all | |
299 | * commands/drives support that. Let ide_timer_expiry keep polling us | |
300 | * for these. | |
301 | */ | |
82ed4db4 | 302 | switch (scsi_req(rq)->cmd[0]) { |
4cad085e BP |
303 | case GPCMD_BLANK: |
304 | case GPCMD_FORMAT_UNIT: | |
305 | case GPCMD_RESERVE_RZONE_TRACK: | |
306 | case GPCMD_CLOSE_TRACK: | |
307 | case GPCMD_FLUSH_CACHE: | |
308 | wait = ATAPI_WAIT_PC; | |
309 | break; | |
310 | default: | |
e8064021 | 311 | if (!(rq->rq_flags & RQF_QUIET)) |
103f7033 | 312 | printk(KERN_INFO PFX "cmd 0x%x timed out\n", |
82ed4db4 | 313 | scsi_req(rq)->cmd[0]); |
4cad085e BP |
314 | wait = 0; |
315 | break; | |
316 | } | |
317 | return wait; | |
318 | } | |
319 | EXPORT_SYMBOL_GPL(ide_cd_expiry); | |
320 | ||
392de1d5 BP |
321 | int ide_cd_get_xferlen(struct request *rq) |
322 | { | |
aebf526b CH |
323 | switch (req_op(rq)) { |
324 | default: | |
392de1d5 | 325 | return 32768; |
aebf526b CH |
326 | case REQ_OP_SCSI_IN: |
327 | case REQ_OP_SCSI_OUT: | |
34b7d2c9 | 328 | return blk_rq_bytes(rq); |
aebf526b CH |
329 | case REQ_OP_DRV_IN: |
330 | case REQ_OP_DRV_OUT: | |
2f5a8e80 CH |
331 | switch (ide_req(rq)->type) { |
332 | case ATA_PRIV_PC: | |
333 | case ATA_PRIV_SENSE: | |
334 | return blk_rq_bytes(rq); | |
aebf526b CH |
335 | default: |
336 | return 0; | |
2f5a8e80 | 337 | } |
33659ebb | 338 | } |
392de1d5 BP |
339 | } |
340 | EXPORT_SYMBOL_GPL(ide_cd_get_xferlen); | |
341 | ||
0d6a9754 BZ |
342 | void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason) |
343 | { | |
3153c26b | 344 | struct ide_taskfile tf; |
0d6a9754 | 345 | |
3153c26b SS |
346 | drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_NSECT | |
347 | IDE_VALID_LBAM | IDE_VALID_LBAH); | |
0d6a9754 | 348 | |
3153c26b SS |
349 | *bcount = (tf.lbah << 8) | tf.lbam; |
350 | *ireason = tf.nsect & 3; | |
0d6a9754 BZ |
351 | } |
352 | EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason); | |
353 | ||
103f7033 BP |
354 | /* |
355 | * Check the contents of the interrupt reason register and attempt to recover if | |
356 | * there are problems. | |
357 | * | |
358 | * Returns: | |
359 | * - 0 if everything's ok | |
360 | * - 1 if the request has to be terminated. | |
361 | */ | |
362 | int ide_check_ireason(ide_drive_t *drive, struct request *rq, int len, | |
363 | int ireason, int rw) | |
364 | { | |
365 | ide_hwif_t *hwif = drive->hwif; | |
366 | ||
367 | debug_log("ireason: 0x%x, rw: 0x%x\n", ireason, rw); | |
368 | ||
369 | if (ireason == (!rw << 1)) | |
370 | return 0; | |
371 | else if (ireason == (rw << 1)) { | |
372 | printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n", | |
373 | drive->name, __func__); | |
374 | ||
375 | if (dev_is_idecd(drive)) | |
376 | ide_pad_transfer(drive, rw, len); | |
377 | } else if (!rw && ireason == ATAPI_COD) { | |
378 | if (dev_is_idecd(drive)) { | |
379 | /* | |
380 | * Some drives (ASUS) seem to tell us that status info | |
381 | * is available. Just get it and ignore. | |
382 | */ | |
383 | (void)hwif->tp_ops->read_status(hwif); | |
384 | return 0; | |
385 | } | |
386 | } else { | |
387 | if (ireason & ATAPI_COD) | |
388 | printk(KERN_ERR PFX "%s: CoD != 0 in %s\n", drive->name, | |
389 | __func__); | |
390 | ||
391 | /* drive wants a command packet, or invalid ireason... */ | |
392 | printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n", | |
393 | drive->name, __func__, ireason); | |
394 | } | |
395 | ||
2f5a8e80 | 396 | if (dev_is_idecd(drive) && ata_pc_request(rq)) |
e8064021 | 397 | rq->rq_flags |= RQF_FAILED; |
103f7033 BP |
398 | |
399 | return 1; | |
400 | } | |
401 | EXPORT_SYMBOL_GPL(ide_check_ireason); | |
402 | ||
aa5d2de7 BZ |
403 | /* |
404 | * This is the usual interrupt handler which will be called during a packet | |
405 | * command. We will transfer some of the data (as requested by the drive) | |
406 | * and will re-point interrupt handler to us. | |
407 | */ | |
408 | static ide_startstop_t ide_pc_intr(ide_drive_t *drive) | |
646c0cb6 | 409 | { |
2b9efba4 | 410 | struct ide_atapi_pc *pc = drive->pc; |
646c0cb6 | 411 | ide_hwif_t *hwif = drive->hwif; |
f094d4d8 | 412 | struct ide_cmd *cmd = &hwif->cmd; |
b65fac32 | 413 | struct request *rq = hwif->rq; |
374e042c | 414 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
d93bc452 | 415 | unsigned int timeout, done; |
646c0cb6 | 416 | u16 bcount; |
5d655a03 | 417 | u8 stat, ireason, dsc = 0; |
d93bc452 | 418 | u8 write = !!(pc->flags & PC_FLAG_WRITING); |
646c0cb6 BZ |
419 | |
420 | debug_log("Enter %s - interrupt handler\n", __func__); | |
421 | ||
5d655a03 BP |
422 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD |
423 | : WAIT_TAPE_CMD; | |
844b9468 | 424 | |
646c0cb6 | 425 | /* Clear the interrupt */ |
374e042c | 426 | stat = tp_ops->read_status(hwif); |
646c0cb6 BZ |
427 | |
428 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
88b4132e | 429 | int rc; |
4453011f | 430 | |
88b4132e BZ |
431 | drive->waiting_for_dma = 0; |
432 | rc = hwif->dma_ops->dma_end(drive); | |
f094d4d8 | 433 | ide_dma_unmap_sg(drive, cmd); |
4453011f BZ |
434 | |
435 | if (rc || (drive->media == ide_tape && (stat & ATA_ERR))) { | |
5d655a03 | 436 | if (drive->media == ide_floppy) |
103f7033 | 437 | printk(KERN_ERR PFX "%s: DMA %s error\n", |
646c0cb6 BZ |
438 | drive->name, rq_data_dir(pc->rq) |
439 | ? "write" : "read"); | |
440 | pc->flags |= PC_FLAG_DMA_ERROR; | |
6d700387 | 441 | } else |
82ed4db4 | 442 | scsi_req(rq)->resid_len = 0; |
646c0cb6 BZ |
443 | debug_log("%s: DMA finished\n", drive->name); |
444 | } | |
445 | ||
446 | /* No more interrupts */ | |
3a7d2484 | 447 | if ((stat & ATA_DRQ) == 0) { |
2a842aca CH |
448 | int uptodate; |
449 | blk_status_t error; | |
03a2faae | 450 | |
646c0cb6 | 451 | debug_log("Packet command completed, %d bytes transferred\n", |
077e6dba | 452 | blk_rq_bytes(rq)); |
646c0cb6 BZ |
453 | |
454 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
455 | ||
456 | local_irq_enable_in_hardirq(); | |
457 | ||
5d655a03 | 458 | if (drive->media == ide_tape && |
82ed4db4 | 459 | (stat & ATA_ERR) && scsi_req(rq)->cmd[0] == REQUEST_SENSE) |
3a7d2484 | 460 | stat &= ~ATA_ERR; |
8fccf899 | 461 | |
3a7d2484 | 462 | if ((stat & ATA_ERR) || (pc->flags & PC_FLAG_DMA_ERROR)) { |
646c0cb6 BZ |
463 | /* Error detected */ |
464 | debug_log("%s: I/O error\n", drive->name); | |
465 | ||
5d655a03 | 466 | if (drive->media != ide_tape) |
17d5363b | 467 | scsi_req(pc->rq)->result++; |
646c0cb6 | 468 | |
82ed4db4 | 469 | if (scsi_req(rq)->cmd[0] == REQUEST_SENSE) { |
103f7033 BP |
470 | printk(KERN_ERR PFX "%s: I/O error in request " |
471 | "sense command\n", drive->name); | |
646c0cb6 BZ |
472 | return ide_do_reset(drive); |
473 | } | |
474 | ||
8dc7a31f | 475 | debug_log("[cmd %x]: check condition\n", scsi_req(rq)->cmd[0]); |
646c0cb6 BZ |
476 | |
477 | /* Retry operation */ | |
6b544fcc | 478 | ide_retry_pc(drive); |
8fccf899 | 479 | |
646c0cb6 BZ |
480 | /* queued, but not started */ |
481 | return ide_stopped; | |
482 | } | |
646c0cb6 | 483 | pc->error = 0; |
b14c7212 BZ |
484 | |
485 | if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) && (stat & ATA_DSC) == 0) | |
486 | dsc = 1; | |
8fccf899 | 487 | |
b3071d19 TH |
488 | /* |
489 | * ->pc_callback() might change rq->data_len for | |
490 | * residual count, cache total length. | |
491 | */ | |
21d9c5d2 | 492 | done = blk_rq_bytes(rq); |
b3071d19 | 493 | |
646c0cb6 | 494 | /* Command finished - Call the callback function */ |
03a2faae BZ |
495 | uptodate = drive->pc_callback(drive, dsc); |
496 | ||
497 | if (uptodate == 0) | |
498 | drive->failed_pc = NULL; | |
499 | ||
2f5a8e80 | 500 | if (ata_misc_request(rq)) { |
17d5363b | 501 | scsi_req(rq)->result = 0; |
2a842aca | 502 | error = BLK_STS_OK; |
89f78b32 | 503 | } else { |
349d12a1 | 504 | |
aebf526b | 505 | if (blk_rq_is_passthrough(rq) && uptodate <= 0) { |
17d5363b CH |
506 | if (scsi_req(rq)->result == 0) |
507 | scsi_req(rq)->result = -EIO; | |
89f78b32 | 508 | } |
349d12a1 | 509 | |
2a842aca | 510 | error = uptodate ? BLK_STS_OK : BLK_STS_IOERR; |
89f78b32 | 511 | } |
8fccf899 | 512 | |
c3a4d78c | 513 | ide_complete_rq(drive, error, blk_rq_bytes(rq)); |
646c0cb6 BZ |
514 | return ide_stopped; |
515 | } | |
516 | ||
517 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { | |
518 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
103f7033 BP |
519 | printk(KERN_ERR PFX "%s: The device wants to issue more " |
520 | "interrupts in DMA mode\n", drive->name); | |
646c0cb6 BZ |
521 | ide_dma_off(drive); |
522 | return ide_do_reset(drive); | |
523 | } | |
646c0cb6 | 524 | |
1823649b BZ |
525 | /* Get the number of bytes to transfer on this interrupt. */ |
526 | ide_read_bcount_and_ireason(drive, &bcount, &ireason); | |
646c0cb6 | 527 | |
103f7033 | 528 | if (ide_check_ireason(drive, rq, bcount, ireason, write)) |
646c0cb6 | 529 | return ide_do_reset(drive); |
8fccf899 | 530 | |
6d700387 TH |
531 | done = min_t(unsigned int, bcount, cmd->nleft); |
532 | ide_pio_bytes(drive, cmd, write, done); | |
646c0cb6 | 533 | |
6d700387 | 534 | /* Update transferred byte count */ |
82ed4db4 | 535 | scsi_req(rq)->resid_len -= done; |
d93bc452 BZ |
536 | |
537 | bcount -= done; | |
538 | ||
539 | if (bcount) | |
540 | ide_pad_transfer(drive, write, bcount); | |
541 | ||
077e6dba | 542 | debug_log("[cmd %x] transferred %d bytes, padded %d bytes, resid: %u\n", |
8dc7a31f | 543 | scsi_req(rq)->cmd[0], done, bcount, scsi_req(rq)->resid_len); |
646c0cb6 | 544 | |
646c0cb6 | 545 | /* And set the interrupt handler again */ |
60c0cd02 | 546 | ide_set_handler(drive, ide_pc_intr, timeout); |
646c0cb6 BZ |
547 | return ide_started; |
548 | } | |
594c16d8 | 549 | |
60f85019 | 550 | static void ide_init_packet_cmd(struct ide_cmd *cmd, u8 valid_tf, |
b788ee9c | 551 | u16 bcount, u8 dma) |
7a254df0 | 552 | { |
60f85019 SS |
553 | cmd->protocol = dma ? ATAPI_PROT_DMA : ATAPI_PROT_PIO; |
554 | cmd->valid.out.tf = IDE_VALID_LBAH | IDE_VALID_LBAM | | |
555 | IDE_VALID_FEATURE | valid_tf; | |
35b5d0be | 556 | cmd->tf.command = ATA_CMD_PACKET; |
b788ee9c BZ |
557 | cmd->tf.feature = dma; /* Use PIO/DMA */ |
558 | cmd->tf.lbam = bcount & 0xff; | |
559 | cmd->tf.lbah = (bcount >> 8) & 0xff; | |
7a254df0 BZ |
560 | } |
561 | ||
88a72109 BZ |
562 | static u8 ide_read_ireason(ide_drive_t *drive) |
563 | { | |
3153c26b | 564 | struct ide_taskfile tf; |
88a72109 | 565 | |
3153c26b | 566 | drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_NSECT); |
88a72109 | 567 | |
3153c26b | 568 | return tf.nsect & 3; |
88a72109 BZ |
569 | } |
570 | ||
594c16d8 BZ |
571 | static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason) |
572 | { | |
594c16d8 BZ |
573 | int retries = 100; |
574 | ||
3a7d2484 BZ |
575 | while (retries-- && ((ireason & ATAPI_COD) == 0 || |
576 | (ireason & ATAPI_IO))) { | |
103f7033 | 577 | printk(KERN_ERR PFX "%s: (IO,CoD != (0,1) while issuing " |
594c16d8 BZ |
578 | "a packet command, retrying\n", drive->name); |
579 | udelay(100); | |
88a72109 | 580 | ireason = ide_read_ireason(drive); |
594c16d8 | 581 | if (retries == 0) { |
103f7033 BP |
582 | printk(KERN_ERR PFX "%s: (IO,CoD != (0,1) while issuing" |
583 | " a packet command, ignoring\n", | |
594c16d8 | 584 | drive->name); |
3a7d2484 BZ |
585 | ireason |= ATAPI_COD; |
586 | ireason &= ~ATAPI_IO; | |
594c16d8 BZ |
587 | } |
588 | } | |
589 | ||
590 | return ireason; | |
591 | } | |
592 | ||
baf08f0b BZ |
593 | static int ide_delayed_transfer_pc(ide_drive_t *drive) |
594 | { | |
595 | /* Send the actual packet */ | |
596 | drive->hwif->tp_ops->output_data(drive, NULL, drive->pc->c, 12); | |
597 | ||
598 | /* Timeout for the packet command */ | |
599 | return WAIT_FLOPPY_CMD; | |
600 | } | |
601 | ||
602 | static ide_startstop_t ide_transfer_pc(ide_drive_t *drive) | |
594c16d8 | 603 | { |
b16aabc9 | 604 | struct ide_atapi_pc *uninitialized_var(pc); |
594c16d8 | 605 | ide_hwif_t *hwif = drive->hwif; |
b65fac32 | 606 | struct request *rq = hwif->rq; |
baf08f0b BZ |
607 | ide_expiry_t *expiry; |
608 | unsigned int timeout; | |
8c662852 | 609 | int cmd_len; |
594c16d8 BZ |
610 | ide_startstop_t startstop; |
611 | u8 ireason; | |
612 | ||
3a7d2484 | 613 | if (ide_wait_stat(&startstop, drive, ATA_DRQ, ATA_BUSY, WAIT_READY)) { |
103f7033 | 614 | printk(KERN_ERR PFX "%s: Strange, packet command initiated yet " |
594c16d8 BZ |
615 | "DRQ isn't asserted\n", drive->name); |
616 | return startstop; | |
617 | } | |
618 | ||
5f25843f BP |
619 | if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { |
620 | if (drive->dma) | |
621 | drive->waiting_for_dma = 1; | |
622 | } | |
623 | ||
8c662852 BP |
624 | if (dev_is_idecd(drive)) { |
625 | /* ATAPI commands get padded out to 12 bytes minimum */ | |
82ed4db4 | 626 | cmd_len = COMMAND_SIZE(scsi_req(rq)->cmd[0]); |
8c662852 BP |
627 | if (cmd_len < ATAPI_MIN_CDB_BYTES) |
628 | cmd_len = ATAPI_MIN_CDB_BYTES; | |
8c662852 | 629 | |
def860d0 BP |
630 | timeout = rq->timeout; |
631 | expiry = ide_cd_expiry; | |
baf08f0b | 632 | } else { |
b16aabc9 BP |
633 | pc = drive->pc; |
634 | ||
def860d0 BP |
635 | cmd_len = ATAPI_MIN_CDB_BYTES; |
636 | ||
637 | /* | |
638 | * If necessary schedule the packet transfer to occur 'timeout' | |
19af5cdb | 639 | * milliseconds later in ide_delayed_transfer_pc() after the |
def860d0 BP |
640 | * device says it's ready for a packet. |
641 | */ | |
642 | if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) { | |
643 | timeout = drive->pc_delay; | |
644 | expiry = &ide_delayed_transfer_pc; | |
645 | } else { | |
646 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD | |
647 | : WAIT_TAPE_CMD; | |
648 | expiry = NULL; | |
649 | } | |
06cc2778 BP |
650 | |
651 | ireason = ide_read_ireason(drive); | |
652 | if (drive->media == ide_tape) | |
653 | ireason = ide_wait_ireason(drive, ireason); | |
654 | ||
655 | if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_IO)) { | |
103f7033 BP |
656 | printk(KERN_ERR PFX "%s: (IO,CoD) != (0,1) while " |
657 | "issuing a packet command\n", drive->name); | |
06cc2778 BP |
658 | |
659 | return ide_do_reset(drive); | |
660 | } | |
baf08f0b BZ |
661 | } |
662 | ||
60c0cd02 BZ |
663 | hwif->expiry = expiry; |
664 | ||
594c16d8 | 665 | /* Set the interrupt routine */ |
d6251d44 BP |
666 | ide_set_handler(drive, |
667 | (dev_is_idecd(drive) ? drive->irq_handler | |
668 | : ide_pc_intr), | |
60c0cd02 | 669 | timeout); |
594c16d8 | 670 | |
2eba0827 BP |
671 | /* Send the actual packet */ |
672 | if ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0) | |
82ed4db4 | 673 | hwif->tp_ops->output_data(drive, NULL, scsi_req(rq)->cmd, cmd_len); |
2eba0827 | 674 | |
594c16d8 | 675 | /* Begin DMA, if necessary */ |
b16aabc9 BP |
676 | if (dev_is_idecd(drive)) { |
677 | if (drive->dma) | |
678 | hwif->dma_ops->dma_start(drive); | |
679 | } else { | |
680 | if (pc->flags & PC_FLAG_DMA_OK) { | |
681 | pc->flags |= PC_FLAG_DMA_IN_PROGRESS; | |
682 | hwif->dma_ops->dma_start(drive); | |
683 | } | |
594c16d8 BZ |
684 | } |
685 | ||
594c16d8 BZ |
686 | return ide_started; |
687 | } | |
6bf1641c | 688 | |
b788ee9c | 689 | ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_cmd *cmd) |
6bf1641c | 690 | { |
d77612ab | 691 | struct ide_atapi_pc *pc; |
6bf1641c | 692 | ide_hwif_t *hwif = drive->hwif; |
4cad085e | 693 | ide_expiry_t *expiry = NULL; |
e6830a86 | 694 | struct request *rq = hwif->rq; |
dfb7e621 | 695 | unsigned int timeout, bytes; |
392de1d5 | 696 | u16 bcount; |
60f85019 | 697 | u8 valid_tf; |
35b5d0be | 698 | u8 drq_int = !!(drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT); |
6bf1641c | 699 | |
ed48554f | 700 | if (dev_is_idecd(drive)) { |
60f85019 | 701 | valid_tf = IDE_VALID_NSECT | IDE_VALID_LBAL; |
e6830a86 | 702 | bcount = ide_cd_get_xferlen(rq); |
4cad085e | 703 | expiry = ide_cd_expiry; |
28ad91db | 704 | timeout = ATAPI_WAIT_PC; |
d77612ab | 705 | |
5ae5412d BZ |
706 | if (drive->dma) |
707 | drive->dma = !ide_dma_prepare(drive, cmd); | |
ed48554f | 708 | } else { |
d77612ab BP |
709 | pc = drive->pc; |
710 | ||
60f85019 | 711 | valid_tf = IDE_VALID_DEVICE; |
dfb7e621 | 712 | bytes = blk_rq_bytes(rq); |
dfb7e621 BP |
713 | bcount = ((drive->media == ide_tape) ? bytes |
714 | : min_t(unsigned int, | |
715 | bytes, 63 * 1024)); | |
6bf1641c | 716 | |
077e6dba | 717 | /* We haven't transferred any data yet */ |
82ed4db4 | 718 | scsi_req(rq)->resid_len = bcount; |
6bf1641c | 719 | |
d77612ab BP |
720 | if (pc->flags & PC_FLAG_DMA_ERROR) { |
721 | pc->flags &= ~PC_FLAG_DMA_ERROR; | |
722 | ide_dma_off(drive); | |
723 | } | |
6bf1641c | 724 | |
5ae5412d BZ |
725 | if (pc->flags & PC_FLAG_DMA_OK) |
726 | drive->dma = !ide_dma_prepare(drive, cmd); | |
6bf1641c | 727 | |
d77612ab BP |
728 | if (!drive->dma) |
729 | pc->flags &= ~PC_FLAG_DMA_OK; | |
28ad91db BP |
730 | |
731 | timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD | |
732 | : WAIT_TAPE_CMD; | |
d77612ab | 733 | } |
6bf1641c | 734 | |
60f85019 | 735 | ide_init_packet_cmd(cmd, valid_tf, bcount, drive->dma); |
b788ee9c BZ |
736 | |
737 | (void)do_rw_taskfile(drive, cmd); | |
6bf1641c | 738 | |
35b5d0be | 739 | if (drq_int) { |
5f25843f BP |
740 | if (drive->dma) |
741 | drive->waiting_for_dma = 0; | |
22117d6e | 742 | hwif->expiry = expiry; |
6bf1641c | 743 | } |
35b5d0be BZ |
744 | |
745 | ide_execute_command(drive, cmd, ide_transfer_pc, timeout); | |
746 | ||
747 | return drq_int ? ide_started : ide_transfer_pc(drive); | |
6bf1641c BZ |
748 | } |
749 | EXPORT_SYMBOL_GPL(ide_issue_pc); |