1 /*-
2 * Copyright (c) 1998 - 2008 S�ren Schmidt <sos@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer,
10 * without modification, immediately at the beginning of the file.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: stable/9/sys/dev/ata/ata-queue.c 251224 2013-06-01 13:10:24Z marius $");
29
30 #include "opt_ata.h"
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/ata.h>
34 #include <sys/kernel.h>
35 #include <sys/bio.h>
36 #include <sys/bus.h>
37 #include <sys/conf.h>
38 #include <sys/sema.h>
39 #include <sys/taskqueue.h>
40 #include <vm/uma.h>
41 #include <machine/bus.h>
42 #include <sys/rman.h>
43 #include <dev/ata/ata-all.h>
44 #include <ata_if.h>
45
46 #ifndef ATA_CAM
47 /* prototypes */
48 static void ata_completed(void *, int);
49 static void ata_sort_queue(struct ata_channel *ch, struct ata_request *request);
50 static const char *ata_skey2str(u_int8_t);
51 #endif
52
53 #ifndef ATA_CAM
54 void
ata_queue_request(struct ata_request * request)55 ata_queue_request(struct ata_request *request)
56 {
57 struct ata_channel *ch;
58 struct ata_device *atadev = device_get_softc(request->dev);
59
60 /* treat request as virgin (this might be an ATA_R_REQUEUE) */
61 request->result = request->status = request->error = 0;
62
63 /* Prepare paramers required by low-level code. */
64 request->unit = atadev->unit;
65 if (!(request->parent = device_get_parent(request->dev))) {
66 request->result = ENXIO;
67 if (request->callback)
68 (request->callback)(request);
69 return;
70 }
71 if ((atadev->param.config & ATA_PROTO_MASK) == ATA_PROTO_ATAPI_16)
72 request->flags |= ATA_R_ATAPI16;
73 if ((atadev->param.config & ATA_DRQ_MASK) == ATA_DRQ_INTR)
74 request->flags |= ATA_R_ATAPI_INTR;
75 if ((request->flags & ATA_R_ATAPI) == 0)
76 ata_modify_if_48bit(request);
77 ch = device_get_softc(request->parent);
78 callout_init_mtx(&request->callout, &ch->state_mtx, CALLOUT_RETURNUNLOCKED);
79 if (!request->callback && !(request->flags & ATA_R_REQUEUE))
80 sema_init(&request->done, 0, "ATA request done");
81
82 /* in ATA_STALL_QUEUE state we call HW directly */
83 if ((ch->state & ATA_STALL_QUEUE) && (request->flags & ATA_R_CONTROL)) {
84 mtx_lock(&ch->state_mtx);
85 ch->running = request;
86 if (ch->hw.begin_transaction(request) == ATA_OP_FINISHED) {
87 ch->running = NULL;
88 if (!request->callback)
89 sema_destroy(&request->done);
90 mtx_unlock(&ch->state_mtx);
91 return;
92 }
93 mtx_unlock(&ch->state_mtx);
94 }
95 /* otherwise put request on the locked queue at the specified location */
96 else {
97 mtx_lock(&ch->queue_mtx);
98 if (request->flags & ATA_R_AT_HEAD)
99 TAILQ_INSERT_HEAD(&ch->ata_queue, request, chain);
100 else if (request->flags & ATA_R_ORDERED)
101 ata_sort_queue(ch, request);
102 else
103 TAILQ_INSERT_TAIL(&ch->ata_queue, request, chain);
104 mtx_unlock(&ch->queue_mtx);
105 ATA_DEBUG_RQ(request, "queued");
106 ata_start(ch->dev);
107 }
108
109 /* if this is a requeued request callback/sleep we're done */
110 if (request->flags & ATA_R_REQUEUE)
111 return;
112
113 /* if this is not a callback wait until request is completed */
114 if (!request->callback) {
115 ATA_DEBUG_RQ(request, "wait for completion");
116 if (!dumping &&
117 sema_timedwait(&request->done, request->timeout * hz * 4)) {
118 callout_drain(&request->callout);
119 device_printf(request->dev,
120 "WARNING - %s taskqueue timeout "
121 "- completing request directly\n",
122 ata_cmd2str(request));
123 request->flags |= ATA_R_DANGER1;
124 ata_completed(request, 0);
125 }
126 sema_destroy(&request->done);
127 }
128 }
129 #endif
130
131 #ifndef ATA_CAM
132 int
ata_controlcmd(device_t dev,u_int8_t command,u_int16_t feature,u_int64_t lba,u_int16_t count)133 ata_controlcmd(device_t dev, u_int8_t command, u_int16_t feature,
134 u_int64_t lba, u_int16_t count)
135 {
136 struct ata_device *atadev = device_get_softc(dev);
137 struct ata_request *request = ata_alloc_request();
138 int error = ENOMEM;
139
140 if (request) {
141 request->dev = dev;
142 request->u.ata.command = command;
143 request->u.ata.lba = lba;
144 request->u.ata.count = count;
145 request->u.ata.feature = feature;
146 request->flags = ATA_R_CONTROL;
147 if (atadev->spindown_state) {
148 device_printf(dev, "request while spun down, starting.\n");
149 atadev->spindown_state = 0;
150 request->timeout = MAX(ATA_REQUEST_TIMEOUT, 31);
151 } else {
152 request->timeout = ATA_REQUEST_TIMEOUT;
153 }
154 request->retries = 0;
155 ata_queue_request(request);
156 error = request->result;
157 ata_free_request(request);
158 }
159 return error;
160 }
161 #endif
162
163 #ifndef ATA_CAM
164 int
ata_atapicmd(device_t dev,u_int8_t * ccb,caddr_t data,int count,int flags,int timeout)165 ata_atapicmd(device_t dev, u_int8_t *ccb, caddr_t data,
166 int count, int flags, int timeout)
167 {
168 struct ata_request *request = ata_alloc_request();
169 int error = ENOMEM;
170
171 if (request) {
172 request->dev = dev;
173 bcopy(ccb, request->u.atapi.ccb, 16);
174 request->data = data;
175 request->bytecount = count;
176 request->transfersize = min(request->bytecount, 65534);
177 request->flags = flags | ATA_R_ATAPI;
178 request->timeout = timeout;
179 request->retries = 0;
180 ata_queue_request(request);
181 error = request->result;
182 ata_free_request(request);
183 }
184 return error;
185 }
186 #endif
187
188 #ifndef ATA_CAM
189 void
ata_start(device_t dev)190 ata_start(device_t dev)
191 {
192 struct ata_channel *ch = device_get_softc(dev);
193 struct ata_request *request;
194 struct ata_composite *cptr;
195 int dependencies = 0;
196
197 /* if we have a request on the queue try to get it running */
198 mtx_lock(&ch->queue_mtx);
199 if ((request = TAILQ_FIRST(&ch->ata_queue))) {
200
201 /* we need the locking function to get the lock for this channel */
202 if (ATA_LOCKING(dev, ATA_LF_LOCK) == ch->unit) {
203
204 /* check for composite dependencies */
205 if ((cptr = request->composite)) {
206 mtx_lock(&cptr->lock);
207 if ((request->flags & ATA_R_WRITE) &&
208 (cptr->wr_depend & cptr->rd_done) != cptr->wr_depend) {
209 dependencies = 1;
210 }
211 mtx_unlock(&cptr->lock);
212 }
213
214 /* check we are in the right state and has no dependencies */
215 mtx_lock(&ch->state_mtx);
216 if (ch->state == ATA_IDLE && !dependencies) {
217 ATA_DEBUG_RQ(request, "starting");
218 TAILQ_REMOVE(&ch->ata_queue, request, chain);
219 ch->running = request;
220 ch->state = ATA_ACTIVE;
221
222 /* if we are the freezing point release it */
223 if (ch->freezepoint == request)
224 ch->freezepoint = NULL;
225
226 if (ch->hw.begin_transaction(request) == ATA_OP_FINISHED) {
227 ch->running = NULL;
228 ch->state = ATA_IDLE;
229 mtx_unlock(&ch->state_mtx);
230 mtx_unlock(&ch->queue_mtx);
231 ATA_LOCKING(dev, ATA_LF_UNLOCK);
232 ata_finish(request);
233 return;
234 }
235 }
236 mtx_unlock(&ch->state_mtx);
237 }
238 }
239 mtx_unlock(&ch->queue_mtx);
240 if (dumping) {
241 while (ch->running) {
242 ata_interrupt(ch);
243 DELAY(10);
244 }
245 }
246 }
247 #endif
248
249 #ifndef ATA_CAM
250 void
ata_finish(struct ata_request * request)251 ata_finish(struct ata_request *request)
252 {
253 struct ata_channel *ch = device_get_softc(request->parent);
254
255 /*
256 * if in ATA_STALL_QUEUE state or request has ATA_R_DIRECT flags set
257 * we need to call ata_complete() directly here (no taskqueue involvement)
258 */
259 if (dumping ||
260 (ch->state & ATA_STALL_QUEUE) || (request->flags & ATA_R_DIRECT)) {
261 ATA_DEBUG_RQ(request, "finish directly");
262 ata_completed(request, 0);
263 }
264 else {
265 /* put request on the proper taskqueue for completion */
266 if (request->bio && !(request->flags & (ATA_R_THREAD | ATA_R_TIMEOUT))){
267 ATA_DEBUG_RQ(request, "finish bio_taskqueue");
268 bio_taskqueue(request->bio, (bio_task_t *)ata_completed, request);
269 }
270 else {
271 TASK_INIT(&request->task, 0, ata_completed, request);
272 ATA_DEBUG_RQ(request, "finish taskqueue_swi");
273 taskqueue_enqueue(taskqueue_swi, &request->task);
274 }
275 }
276 }
277 #endif
278
279 #ifndef ATA_CAM
280 static void
ata_completed(void * context,int dummy)281 ata_completed(void *context, int dummy)
282 {
283 struct ata_request *request = (struct ata_request *)context;
284 struct ata_channel *ch = device_get_softc(request->parent);
285 struct ata_device *atadev = device_get_softc(request->dev);
286 struct ata_composite *composite;
287
288 if (request->flags & ATA_R_DANGER2) {
289 device_printf(request->dev,
290 "WARNING - %s freeing taskqueue zombie request\n",
291 ata_cmd2str(request));
292 request->flags &= ~(ATA_R_DANGER1 | ATA_R_DANGER2);
293 ata_free_request(request);
294 return;
295 }
296 if (request->flags & ATA_R_DANGER1)
297 request->flags |= ATA_R_DANGER2;
298
299 ATA_DEBUG_RQ(request, "completed entered");
300
301 /* if we had a timeout, reinit channel and deal with the falldown */
302 if (request->flags & ATA_R_TIMEOUT) {
303 /*
304 * if the channel is still present and
305 * reinit succeeds and
306 * the device doesn't get detached and
307 * there are retries left we reinject this request
308 */
309 if (ch && !ata_reinit(ch->dev) && !request->result &&
310 (request->retries-- > 0)) {
311 if (!(request->flags & ATA_R_QUIET)) {
312 device_printf(request->dev,
313 "TIMEOUT - %s retrying (%d retr%s left)",
314 ata_cmd2str(request), request->retries,
315 request->retries == 1 ? "y" : "ies");
316 if (!(request->flags & (ATA_R_ATAPI | ATA_R_CONTROL)))
317 printf(" LBA=%ju", request->u.ata.lba);
318 printf("\n");
319 }
320 request->flags &= ~(ATA_R_TIMEOUT | ATA_R_DEBUG);
321 request->flags |= (ATA_R_AT_HEAD | ATA_R_REQUEUE);
322 ATA_DEBUG_RQ(request, "completed reinject");
323 ata_queue_request(request);
324 return;
325 }
326
327 /* ran out of good intentions so finish with error */
328 if (!request->result) {
329 if (!(request->flags & ATA_R_QUIET)) {
330 if (request->dev) {
331 device_printf(request->dev, "FAILURE - %s timed out",
332 ata_cmd2str(request));
333 if (!(request->flags & (ATA_R_ATAPI | ATA_R_CONTROL)))
334 printf(" LBA=%ju", request->u.ata.lba);
335 printf("\n");
336 }
337 }
338 request->result = EIO;
339 }
340 }
341 else if (!(request->flags & ATA_R_ATAPI) ){
342 /* if this is a soft ECC error warn about it */
343 /* XXX SOS we could do WARF here */
344 if ((request->status & (ATA_S_CORR | ATA_S_ERROR)) == ATA_S_CORR) {
345 device_printf(request->dev,
346 "WARNING - %s soft error (ECC corrected)",
347 ata_cmd2str(request));
348 if (!(request->flags & (ATA_R_ATAPI | ATA_R_CONTROL)))
349 printf(" LBA=%ju", request->u.ata.lba);
350 printf("\n");
351 }
352
353 /* if this is a UDMA CRC error we reinject if there are retries left */
354 if (request->flags & ATA_R_DMA && request->error & ATA_E_ICRC) {
355 if (request->retries-- > 0) {
356 device_printf(request->dev,
357 "WARNING - %s UDMA ICRC error (retrying request)",
358 ata_cmd2str(request));
359 if (!(request->flags & (ATA_R_ATAPI | ATA_R_CONTROL)))
360 printf(" LBA=%ju", request->u.ata.lba);
361 printf("\n");
362 request->flags |= (ATA_R_AT_HEAD | ATA_R_REQUEUE);
363 ata_queue_request(request);
364 return;
365 }
366 }
367 }
368
369 switch (request->flags & ATA_R_ATAPI) {
370
371 /* ATA errors */
372 default:
373 if (!request->result && request->status & ATA_S_ERROR) {
374 if (!(request->flags & ATA_R_QUIET)) {
375 device_printf(request->dev,
376 "FAILURE - %s status=%b error=%b",
377 ata_cmd2str(request),
378 request->status, "\20\10BUSY\7READY\6DMA_READY"
379 "\5DSC\4DRQ\3CORRECTABLE\2INDEX\1ERROR",
380 request->error, "\20\10ICRC\7UNCORRECTABLE"
381 "\6MEDIA_CHANGED\5NID_NOT_FOUND"
382 "\4MEDIA_CHANGE_REQEST"
383 "\3ABORTED\2NO_MEDIA\1ILLEGAL_LENGTH");
384 if ((request->flags & ATA_R_DMA) && request->dma &&
385 (request->dma->status & ATA_BMSTAT_ERROR))
386 printf(" dma=0x%02x", request->dma->status);
387 if (!(request->flags & (ATA_R_ATAPI | ATA_R_CONTROL)))
388 printf(" LBA=%ju", request->u.ata.lba);
389 printf("\n");
390 }
391 request->result = EIO;
392 }
393 break;
394
395 /* ATAPI errors */
396 case ATA_R_ATAPI:
397 /* skip if result already set */
398 if (request->result)
399 break;
400
401 /* if we have a sensekey -> request sense from device */
402 if ((request->error & ATA_E_ATAPI_SENSE_MASK) &&
403 (request->u.atapi.ccb[0] != ATAPI_REQUEST_SENSE)) {
404 static u_int8_t ccb[16] = { ATAPI_REQUEST_SENSE, 0, 0, 0,
405 sizeof(struct atapi_sense),
406 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
407
408 request->u.atapi.saved_cmd = request->u.atapi.ccb[0];
409 bcopy(ccb, request->u.atapi.ccb, 16);
410 request->data = (caddr_t)&request->u.atapi.sense;
411 request->bytecount = sizeof(struct atapi_sense);
412 request->donecount = 0;
413 request->transfersize = sizeof(struct atapi_sense);
414 request->timeout = ATA_REQUEST_TIMEOUT;
415 request->flags &= (ATA_R_ATAPI | ATA_R_QUIET | ATA_R_DEBUG);
416 request->flags |= (ATA_R_READ | ATA_R_AT_HEAD | ATA_R_REQUEUE);
417 ATA_DEBUG_RQ(request, "autoissue request sense");
418 ata_queue_request(request);
419 return;
420 }
421
422 switch (request->u.atapi.sense.key & ATA_SENSE_KEY_MASK) {
423 case ATA_SENSE_RECOVERED_ERROR:
424 device_printf(request->dev, "WARNING - %s recovered error\n",
425 ata_cmd2str(request));
426 /* FALLTHROUGH */
427
428 case ATA_SENSE_NO_SENSE:
429 request->result = 0;
430 break;
431
432 case ATA_SENSE_NOT_READY:
433 request->result = EBUSY;
434 break;
435
436 case ATA_SENSE_UNIT_ATTENTION:
437 atadev->flags |= ATA_D_MEDIA_CHANGED;
438 request->result = EIO;
439 break;
440
441 default:
442 request->result = EIO;
443 if (request->flags & ATA_R_QUIET)
444 break;
445
446 device_printf(request->dev,
447 "FAILURE - %s %s asc=0x%02x ascq=0x%02x ",
448 ata_cmd2str(request), ata_skey2str(
449 (request->u.atapi.sense.key & ATA_SENSE_KEY_MASK)),
450 request->u.atapi.sense.asc,
451 request->u.atapi.sense.ascq);
452 if (request->u.atapi.sense.specific & ATA_SENSE_SPEC_VALID)
453 printf("sks=0x%02x 0x%02x 0x%02x\n",
454 request->u.atapi.sense.specific & ATA_SENSE_SPEC_MASK,
455 request->u.atapi.sense.specific1,
456 request->u.atapi.sense.specific2);
457 else
458 printf("\n");
459 }
460
461 if (!request->result &&
462 (request->u.atapi.sense.key & ATA_SENSE_KEY_MASK ||
463 request->error))
464 request->result = EIO;
465 }
466
467 ATA_DEBUG_RQ(request, "completed callback/wakeup");
468
469 /* if we are part of a composite operation we need to maintain progress */
470 if ((composite = request->composite)) {
471 int index = 0;
472
473 mtx_lock(&composite->lock);
474
475 /* update whats done */
476 if (request->flags & ATA_R_READ)
477 composite->rd_done |= (1 << request->this);
478 if (request->flags & ATA_R_WRITE)
479 composite->wr_done |= (1 << request->this);
480
481 /* find ready to go dependencies */
482 if (composite->wr_depend &&
483 (composite->rd_done & composite->wr_depend)==composite->wr_depend &&
484 (composite->wr_needed & (~composite->wr_done))) {
485 index = composite->wr_needed & ~composite->wr_done;
486 }
487
488 mtx_unlock(&composite->lock);
489
490 /* if we have any ready candidates kick them off */
491 if (index) {
492 int bit;
493
494 for (bit = 0; bit < MAX_COMPOSITES; bit++) {
495 if (index & (1 << bit))
496 ata_start(device_get_parent(composite->request[bit]->dev));
497 }
498 }
499 }
500
501 /* get results back to the initiator for this request */
502 if (request->callback)
503 (request->callback)(request);
504 else
505 sema_post(&request->done);
506
507 /* only call ata_start if channel is present */
508 if (ch)
509 ata_start(ch->dev);
510 }
511 #endif
512
513 #ifndef ATA_CAM
514 void
ata_fail_requests(device_t dev)515 ata_fail_requests(device_t dev)
516 {
517 struct ata_channel *ch = device_get_softc(device_get_parent(dev));
518 struct ata_request *request, *tmp;
519 TAILQ_HEAD(, ata_request) fail_requests;
520 TAILQ_INIT(&fail_requests);
521
522 /* grap all channel locks to avoid races */
523 mtx_lock(&ch->queue_mtx);
524 mtx_lock(&ch->state_mtx);
525
526 /* do we have any running request to care about ? */
527 if ((request = ch->running) && (!dev || request->dev == dev)) {
528 callout_stop(&request->callout);
529 ch->running = NULL;
530 request->result = ENXIO;
531 TAILQ_INSERT_TAIL(&fail_requests, request, chain);
532 }
533
534 /* fail all requests queued on this channel for device dev if !NULL */
535 TAILQ_FOREACH_SAFE(request, &ch->ata_queue, chain, tmp) {
536 if (!dev || request->dev == dev) {
537 TAILQ_REMOVE(&ch->ata_queue, request, chain);
538 request->result = ENXIO;
539 TAILQ_INSERT_TAIL(&fail_requests, request, chain);
540 }
541 }
542
543 mtx_unlock(&ch->state_mtx);
544 mtx_unlock(&ch->queue_mtx);
545
546 /* finish up all requests collected above */
547 TAILQ_FOREACH_SAFE(request, &fail_requests, chain, tmp) {
548 TAILQ_REMOVE(&fail_requests, request, chain);
549 ata_finish(request);
550 }
551 }
552 #endif
553
554 #ifndef ATA_CAM
555 /*
556 * Rudely drop all requests queued to the channel of specified device.
557 * XXX: The requests are leaked, use only in fatal case.
558 */
559 void
ata_drop_requests(device_t dev)560 ata_drop_requests(device_t dev)
561 {
562 struct ata_channel *ch = device_get_softc(device_get_parent(dev));
563 struct ata_request *request, *tmp;
564
565 mtx_lock(&ch->queue_mtx);
566 TAILQ_FOREACH_SAFE(request, &ch->ata_queue, chain, tmp) {
567 TAILQ_REMOVE(&ch->ata_queue, request, chain);
568 request->result = ENXIO;
569 }
570 mtx_unlock(&ch->queue_mtx);
571 }
572 #endif
573
574 #ifndef ATA_CAM
575 static u_int64_t
ata_get_lba(struct ata_request * request)576 ata_get_lba(struct ata_request *request)
577 {
578 if (request->flags & ATA_R_ATAPI) {
579 switch (request->u.atapi.ccb[0]) {
580 case ATAPI_READ_BIG:
581 case ATAPI_WRITE_BIG:
582 case ATAPI_READ_CD:
583 return (request->u.atapi.ccb[5]) | (request->u.atapi.ccb[4]<<8) |
584 (request->u.atapi.ccb[3]<<16)|(request->u.atapi.ccb[2]<<24);
585 case ATAPI_READ:
586 case ATAPI_WRITE:
587 return (request->u.atapi.ccb[4]) | (request->u.atapi.ccb[3]<<8) |
588 (request->u.atapi.ccb[2]<<16);
589 default:
590 return 0;
591 }
592 }
593 else
594 return request->u.ata.lba;
595 }
596 #endif
597
598 #ifndef ATA_CAM
599 static void
ata_sort_queue(struct ata_channel * ch,struct ata_request * request)600 ata_sort_queue(struct ata_channel *ch, struct ata_request *request)
601 {
602 struct ata_request *this, *next;
603
604 this = TAILQ_FIRST(&ch->ata_queue);
605
606 /* if the queue is empty just insert */
607 if (!this) {
608 if (request->composite)
609 ch->freezepoint = request;
610 TAILQ_INSERT_TAIL(&ch->ata_queue, request, chain);
611 return;
612 }
613
614 /* dont sort frozen parts of the queue */
615 if (ch->freezepoint)
616 this = ch->freezepoint;
617
618 /* if position is less than head we add after tipping point */
619 if (ata_get_lba(request) < ata_get_lba(this)) {
620 while ((next = TAILQ_NEXT(this, chain))) {
621
622 /* have we reached the tipping point */
623 if (ata_get_lba(next) < ata_get_lba(this)) {
624
625 /* sort the insert */
626 do {
627 if (ata_get_lba(request) < ata_get_lba(next))
628 break;
629 this = next;
630 } while ((next = TAILQ_NEXT(this, chain)));
631 break;
632 }
633 this = next;
634 }
635 }
636
637 /* we are after head so sort the insert before tipping point */
638 else {
639 while ((next = TAILQ_NEXT(this, chain))) {
640 if (ata_get_lba(next) < ata_get_lba(this) ||
641 ata_get_lba(request) < ata_get_lba(next))
642 break;
643 this = next;
644 }
645 }
646
647 if (request->composite)
648 ch->freezepoint = request;
649 TAILQ_INSERT_AFTER(&ch->ata_queue, this, request, chain);
650 }
651 #endif
652
653 #ifndef ATA_CAM
654 static const char *
ata_skey2str(u_int8_t skey)655 ata_skey2str(u_int8_t skey)
656 {
657 switch (skey) {
658 case 0x00: return ("NO SENSE");
659 case 0x01: return ("RECOVERED ERROR");
660 case 0x02: return ("NOT READY");
661 case 0x03: return ("MEDIUM ERROR");
662 case 0x04: return ("HARDWARE ERROR");
663 case 0x05: return ("ILLEGAL REQUEST");
664 case 0x06: return ("UNIT ATTENTION");
665 case 0x07: return ("DATA PROTECT");
666 case 0x08: return ("BLANK CHECK");
667 case 0x09: return ("VENDOR SPECIFIC");
668 case 0x0a: return ("COPY ABORTED");
669 case 0x0b: return ("ABORTED COMMAND");
670 case 0x0c: return ("EQUAL");
671 case 0x0d: return ("VOLUME OVERFLOW");
672 case 0x0e: return ("MISCOMPARE");
673 case 0x0f: return ("RESERVED");
674 default: return("UNKNOWN");
675 }
676 }
677 #endif
678