FreeBSD/Linux Kernel Cross Reference
sys/dev/ata/ata-disk.c
1 /*-
2 * Copyright (c) 1998 - 2008 Søren 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: head/sys/dev/ata/ata-disk.c 199050 2009-11-08 14:33:19Z mav $");
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/module.h>
36 #include <sys/malloc.h>
37 #include <sys/bio.h>
38 #include <sys/bus.h>
39 #include <sys/conf.h>
40 #include <sys/disk.h>
41 #include <sys/cons.h>
42 #include <sys/sema.h>
43 #include <sys/taskqueue.h>
44 #include <vm/uma.h>
45 #include <machine/md_var.h>
46 #include <machine/bus.h>
47 #include <sys/rman.h>
48 #include <geom/geom_disk.h>
49 #include <dev/ata/ata-all.h>
50 #include <dev/ata/ata-pci.h>
51 #include <dev/ata/ata-disk.h>
52 #include <dev/ata/ata-raid.h>
53 #include <ata_if.h>
54
55 /* prototypes */
56 static void ad_init(device_t dev);
57 static void ad_get_geometry(device_t dev);
58 static void ad_set_geometry(device_t dev);
59 static void ad_done(struct ata_request *request);
60 static void ad_describe(device_t dev);
61 static int ad_version(u_int16_t version);
62 static disk_strategy_t ad_strategy;
63 static disk_ioctl_t ad_ioctl;
64 static dumper_t ad_dump;
65
66 /*
67 * Most platforms map firmware geom to actual, but some don't. If
68 * not overridden, default to nothing.
69 */
70 #ifndef ad_firmware_geom_adjust
71 #define ad_firmware_geom_adjust(dev, disk)
72 #endif
73
74 /* local vars */
75 static MALLOC_DEFINE(M_AD, "ad_driver", "ATA disk driver");
76
77 static int
78 ad_probe(device_t dev)
79 {
80 struct ata_device *atadev = device_get_softc(dev);
81
82 if (!(atadev->param.config & ATA_PROTO_ATAPI) ||
83 (atadev->param.config == ATA_CFA_MAGIC1) ||
84 (atadev->param.config == ATA_CFA_MAGIC2) ||
85 (atadev->param.config == ATA_CFA_MAGIC3))
86 return 0;
87 else
88 return ENXIO;
89 }
90
91 static int
92 ad_attach(device_t dev)
93 {
94 struct ata_channel *ch = device_get_softc(device_get_parent(dev));
95 struct ata_device *atadev = device_get_softc(dev);
96 struct ad_softc *adp;
97
98 /* check that we have a virgin disk to attach */
99 if (device_get_ivars(dev))
100 return EEXIST;
101
102 if (!(adp = malloc(sizeof(struct ad_softc), M_AD, M_NOWAIT | M_ZERO))) {
103 device_printf(dev, "out of memory\n");
104 return ENOMEM;
105 }
106 device_set_ivars(dev, adp);
107
108 /* get device geometry into internal structs */
109 ad_get_geometry(dev);
110
111 /* set the max size if configured */
112 if (ata_setmax)
113 ad_set_geometry(dev);
114
115 /* init device parameters */
116 ad_init(dev);
117
118 /* announce we are here */
119 ad_describe(dev);
120
121 /* create the disk device */
122 adp->disk = disk_alloc();
123 adp->disk->d_strategy = ad_strategy;
124 adp->disk->d_ioctl = ad_ioctl;
125 adp->disk->d_dump = ad_dump;
126 adp->disk->d_name = "ad";
127 adp->disk->d_drv1 = dev;
128 adp->disk->d_maxsize = ch->dma.max_iosize ? ch->dma.max_iosize : DFLTPHYS;
129 adp->disk->d_sectorsize = DEV_BSIZE;
130 adp->disk->d_mediasize = DEV_BSIZE * (off_t)adp->total_secs;
131 adp->disk->d_fwsectors = adp->sectors;
132 adp->disk->d_fwheads = adp->heads;
133 adp->disk->d_unit = device_get_unit(dev);
134 if (atadev->param.support.command2 & ATA_SUPPORT_FLUSHCACHE)
135 adp->disk->d_flags = DISKFLAG_CANFLUSHCACHE;
136 if ((atadev->param.support.command2 & ATA_SUPPORT_CFA) ||
137 atadev->param.config == ATA_PROTO_CFA)
138 adp->disk->d_flags = DISKFLAG_CANDELETE;
139 strlcpy(adp->disk->d_ident, atadev->param.serial,
140 sizeof(adp->disk->d_ident));
141 disk_create(adp->disk, DISK_VERSION);
142 device_add_child(dev, "subdisk", device_get_unit(dev));
143 ad_firmware_geom_adjust(dev, adp->disk);
144 bus_generic_attach(dev);
145
146 callout_init(&atadev->spindown_timer, 1);
147 return 0;
148 }
149
150 static int
151 ad_detach(device_t dev)
152 {
153 struct ad_softc *adp = device_get_ivars(dev);
154 struct ata_device *atadev = device_get_softc(dev);
155 device_t *children;
156 int nchildren, i;
157
158 /* check that we have a valid disk to detach */
159 if (!device_get_ivars(dev))
160 return ENXIO;
161
162 /* destroy the power timeout */
163 callout_drain(&atadev->spindown_timer);
164
165 /* detach & delete all children */
166 if (!device_get_children(dev, &children, &nchildren)) {
167 for (i = 0; i < nchildren; i++)
168 if (children[i])
169 device_delete_child(dev, children[i]);
170 free(children, M_TEMP);
171 }
172
173 /* detroy disk from the system so we dont get any further requests */
174 disk_destroy(adp->disk);
175
176 /* fail requests on the queue and any thats "in flight" for this device */
177 ata_fail_requests(dev);
178
179 /* dont leave anything behind */
180 device_set_ivars(dev, NULL);
181 free(adp, M_AD);
182 return 0;
183 }
184
185 static int
186 ad_shutdown(device_t dev)
187 {
188 struct ata_device *atadev = device_get_softc(dev);
189
190 if (atadev->param.support.command2 & ATA_SUPPORT_FLUSHCACHE)
191 ata_controlcmd(dev, ATA_FLUSHCACHE, 0, 0, 0);
192 return 0;
193 }
194
195 static int
196 ad_reinit(device_t dev)
197 {
198 struct ata_channel *ch = device_get_softc(device_get_parent(dev));
199 struct ata_device *atadev = device_get_softc(dev);
200
201 /* if detach pending, return error */
202 if (!(ch->devices & (ATA_ATA_MASTER << atadev->unit)))
203 return 1;
204
205 ad_init(dev);
206 return 0;
207 }
208
209 static void
210 ad_power_callback(struct ata_request *request)
211 {
212 device_printf(request->dev, "drive spun down.\n");
213 ata_free_request(request);
214 }
215
216 static void
217 ad_spindown(void *priv)
218 {
219 device_t dev = priv;
220 struct ata_device *atadev = device_get_softc(dev);
221 struct ata_request *request;
222
223 if (!atadev->spindown)
224 return;
225 device_printf(dev, "Idle, spin down\n");
226 atadev->spindown_state = 1;
227 if (!(request = ata_alloc_request())) {
228 device_printf(dev, "FAILURE - out of memory in ad_spindown\n");
229 return;
230 }
231 request->dev = dev;
232 request->flags = ATA_R_CONTROL;
233 request->timeout = ATA_REQUEST_TIMEOUT;
234 request->retries = 1;
235 request->callback = ad_power_callback;
236 request->u.ata.command = ATA_STANDBY_IMMEDIATE;
237 ata_queue_request(request);
238 }
239
240
241 static void
242 ad_strategy(struct bio *bp)
243 {
244 device_t dev = bp->bio_disk->d_drv1;
245 struct ata_device *atadev = device_get_softc(dev);
246 struct ata_request *request;
247
248 if (atadev->spindown)
249 callout_reset(&atadev->spindown_timer, hz * atadev->spindown,
250 ad_spindown, dev);
251
252 if (!(request = ata_alloc_request())) {
253 device_printf(dev, "FAILURE - out of memory in start\n");
254 biofinish(bp, NULL, ENOMEM);
255 return;
256 }
257
258 /* setup request */
259 request->dev = dev;
260 request->bio = bp;
261 request->callback = ad_done;
262 if (atadev->spindown_state) {
263 device_printf(dev, "request while spun down, starting.\n");
264 atadev->spindown_state = 0;
265 request->timeout = MAX(ATA_REQUEST_TIMEOUT, 31);
266 }
267 else {
268 request->timeout = ATA_REQUEST_TIMEOUT;
269 }
270 request->retries = 2;
271 request->data = bp->bio_data;
272 request->bytecount = bp->bio_bcount;
273 request->u.ata.lba = bp->bio_pblkno;
274 request->u.ata.count = request->bytecount / DEV_BSIZE;
275 request->transfersize = min(bp->bio_bcount, atadev->max_iosize);
276
277 switch (bp->bio_cmd) {
278 case BIO_READ:
279 request->flags = ATA_R_READ;
280 if (atadev->mode >= ATA_DMA) {
281 request->u.ata.command = ATA_READ_DMA;
282 request->flags |= ATA_R_DMA;
283 }
284 else if (request->transfersize > DEV_BSIZE)
285 request->u.ata.command = ATA_READ_MUL;
286 else
287 request->u.ata.command = ATA_READ;
288 break;
289 case BIO_WRITE:
290 request->flags = ATA_R_WRITE;
291 if (atadev->mode >= ATA_DMA) {
292 request->u.ata.command = ATA_WRITE_DMA;
293 request->flags |= ATA_R_DMA;
294 }
295 else if (request->transfersize > DEV_BSIZE)
296 request->u.ata.command = ATA_WRITE_MUL;
297 else
298 request->u.ata.command = ATA_WRITE;
299 break;
300 case BIO_DELETE:
301 request->flags = ATA_R_CONTROL;
302 request->u.ata.command = ATA_CFA_ERASE;
303 request->transfersize = 0;
304 request->donecount = bp->bio_bcount;
305 break;
306 case BIO_FLUSH:
307 request->u.ata.lba = 0;
308 request->u.ata.count = 0;
309 request->u.ata.feature = 0;
310 request->bytecount = 0;
311 request->transfersize = 0;
312 request->flags = ATA_R_CONTROL;
313 request->u.ata.command = ATA_FLUSHCACHE;
314 break;
315 default:
316 device_printf(dev, "FAILURE - unknown BIO operation\n");
317 ata_free_request(request);
318 biofinish(bp, NULL, EIO);
319 return;
320 }
321 request->flags |= ATA_R_ORDERED;
322 ata_queue_request(request);
323 }
324
325 static void
326 ad_done(struct ata_request *request)
327 {
328 struct bio *bp = request->bio;
329
330 /* finish up transfer */
331 if ((bp->bio_error = request->result))
332 bp->bio_flags |= BIO_ERROR;
333 bp->bio_resid = bp->bio_bcount - request->donecount;
334 biodone(bp);
335 ata_free_request(request);
336 }
337
338 static int
339 ad_ioctl(struct disk *disk, u_long cmd, void *data, int flag, struct thread *td)
340 {
341 return ata_device_ioctl(disk->d_drv1, cmd, data);
342 }
343
344 static int
345 ad_dump(void *arg, void *virtual, vm_offset_t physical,
346 off_t offset, size_t length)
347 {
348 struct disk *dp = arg;
349 device_t dev = dp->d_drv1;
350 struct bio bp;
351
352 /* XXX: Drop pre-dump request queue. Long request queue processing
353 * causes stack overflow in ATA working in dumping (interruptless) mode.
354 * Conter-XXX: To make dump coherent we should avoid doing anything
355 * else while dumping.
356 */
357 ata_drop_requests(dev);
358
359 /* length zero is special and really means flush buffers to media */
360 if (!length) {
361 struct ata_device *atadev = device_get_softc(dev);
362 int error = 0;
363
364 if (atadev->param.support.command2 & ATA_SUPPORT_FLUSHCACHE)
365 error = ata_controlcmd(dev, ATA_FLUSHCACHE, 0, 0, 0);
366 return error;
367 }
368
369 bzero(&bp, sizeof(struct bio));
370 bp.bio_disk = dp;
371 bp.bio_pblkno = offset / DEV_BSIZE;
372 bp.bio_bcount = length;
373 bp.bio_data = virtual;
374 bp.bio_cmd = BIO_WRITE;
375 ad_strategy(&bp);
376 return bp.bio_error;
377 }
378
379 static void
380 ad_init(device_t dev)
381 {
382 struct ata_device *atadev = device_get_softc(dev);
383
384 ATA_SETMODE(device_get_parent(dev), dev);
385
386 /* enable readahead caching */
387 if (atadev->param.support.command1 & ATA_SUPPORT_LOOKAHEAD)
388 ata_controlcmd(dev, ATA_SETFEATURES, ATA_SF_ENAB_RCACHE, 0, 0);
389
390 /* enable write caching if supported and configured */
391 if (atadev->param.support.command1 & ATA_SUPPORT_WRITECACHE) {
392 if (ata_wc)
393 ata_controlcmd(dev, ATA_SETFEATURES, ATA_SF_ENAB_WCACHE, 0, 0);
394 else
395 ata_controlcmd(dev, ATA_SETFEATURES, ATA_SF_DIS_WCACHE, 0, 0);
396 }
397
398 /* use multiple sectors/interrupt if device supports it */
399 if (ad_version(atadev->param.version_major)) {
400 int secsperint = max(1, min(atadev->param.sectors_intr, 16));
401
402 if (!ata_controlcmd(dev, ATA_SET_MULTI, 0, 0, secsperint))
403 atadev->max_iosize = secsperint * DEV_BSIZE;
404 }
405 else
406 atadev->max_iosize = DEV_BSIZE;
407 }
408
409 static void
410 ad_get_geometry(device_t dev)
411 {
412 struct ata_device *atadev = device_get_softc(dev);
413 struct ad_softc *adp = device_get_ivars(dev);
414 u_int64_t lbasize48;
415 u_int32_t lbasize;
416
417 if ((atadev->param.atavalid & ATA_FLAG_54_58) &&
418 atadev->param.current_heads && atadev->param.current_sectors) {
419 adp->heads = atadev->param.current_heads;
420 adp->sectors = atadev->param.current_sectors;
421 adp->total_secs = (u_int32_t)atadev->param.current_size_1 |
422 ((u_int32_t)atadev->param.current_size_2 << 16);
423 }
424 else {
425 adp->heads = atadev->param.heads;
426 adp->sectors = atadev->param.sectors;
427 adp->total_secs = atadev->param.cylinders * adp->heads * adp->sectors;
428 }
429 lbasize = (u_int32_t)atadev->param.lba_size_1 |
430 ((u_int32_t)atadev->param.lba_size_2 << 16);
431
432 /* does this device need oldstyle CHS addressing */
433 if (!ad_version(atadev->param.version_major) || !lbasize)
434 atadev->flags |= ATA_D_USE_CHS;
435
436 /* use the 28bit LBA size if valid or bigger than the CHS mapping */
437 if (atadev->param.cylinders == 16383 || adp->total_secs < lbasize)
438 adp->total_secs = lbasize;
439
440 /* use the 48bit LBA size if valid */
441 lbasize48 = ((u_int64_t)atadev->param.lba_size48_1) |
442 ((u_int64_t)atadev->param.lba_size48_2 << 16) |
443 ((u_int64_t)atadev->param.lba_size48_3 << 32) |
444 ((u_int64_t)atadev->param.lba_size48_4 << 48);
445 if ((atadev->param.support.command2 & ATA_SUPPORT_ADDRESS48) &&
446 lbasize48 > ATA_MAX_28BIT_LBA)
447 adp->total_secs = lbasize48;
448 }
449
450 static void
451 ad_set_geometry(device_t dev)
452 {
453 struct ad_softc *adp = device_get_ivars(dev);
454 struct ata_request *request;
455
456 if (1 | bootverbose)
457 device_printf(dev, "ORG %ju sectors [%juC/%dH/%dS]\n", adp->total_secs,
458 adp->total_secs / (adp->heads * adp->sectors),
459 adp->heads, adp->sectors);
460
461 if (!(request = ata_alloc_request()))
462 return;
463
464 /* get the max native size the device supports */
465 request->dev = dev;
466 request->u.ata.command = ATA_READ_NATIVE_MAX_ADDRESS;
467 request->u.ata.lba = 0;
468 request->u.ata.count = 0;
469 request->u.ata.feature = 0;
470 request->flags = ATA_R_CONTROL | ATA_R_QUIET;
471 request->timeout = ATA_REQUEST_TIMEOUT;
472 request->retries = 0;
473 ata_queue_request(request);
474 if (request->status & ATA_S_ERROR)
475 goto out;
476
477 if (1 | bootverbose)
478 device_printf(dev, "MAX %ju sectors\n", request->u.ata.lba + 1);
479
480 /* if original size equals max size nothing more todo */
481 if (adp->total_secs >= request->u.ata.lba)
482 goto out;
483
484 /* set the max native size to its max */
485 request->dev = dev;
486 request->u.ata.command = ATA_SET_MAX_ADDRESS;
487 request->u.ata.count = 1;
488 request->u.ata.feature = 0;
489 request->flags = ATA_R_CONTROL;
490 request->timeout = ATA_REQUEST_TIMEOUT;
491 request->retries = 0;
492 ata_queue_request(request);
493 if (request->status & ATA_S_ERROR)
494 goto out;
495
496 /* refresh geometry from drive */
497 ata_getparam(device_get_softc(dev), 0);
498 ad_get_geometry(dev);
499 if (1 | bootverbose)
500 device_printf(dev, "NEW %ju sectors [%juC/%dH/%dS]\n", adp->total_secs,
501 adp->total_secs / (adp->heads * adp->sectors),
502 adp->heads, adp->sectors);
503 out:
504 ata_free_request(request);
505 }
506
507 static void
508 ad_describe(device_t dev)
509 {
510 struct ata_channel *ch = device_get_softc(device_get_parent(dev));
511 struct ata_device *atadev = device_get_softc(dev);
512 struct ad_softc *adp = device_get_ivars(dev);
513 u_int8_t *marker, vendor[64], product[64];
514
515 /* try to seperate the ATA model string into vendor and model parts */
516 if ((marker = index(atadev->param.model, ' ')) ||
517 (marker = index(atadev->param.model, '-'))) {
518 int len = (marker - atadev->param.model);
519
520 strncpy(vendor, atadev->param.model, len);
521 vendor[len++] = 0;
522 strcat(vendor, " ");
523 strncpy(product, atadev->param.model + len, 40 - len);
524 vendor[40 - len] = 0;
525 }
526 else {
527 if (!strncmp(atadev->param.model, "ST", 2))
528 strcpy(vendor, "Seagate ");
529 else if (!strncmp(atadev->param.model, "HDS", 3))
530 strcpy(vendor, "Hitachi ");
531 else
532 strcpy(vendor, "");
533 strncpy(product, atadev->param.model, 40);
534 }
535
536 device_printf(dev, "%juMB <%s%s %.8s> at ata%d-%s %s%s\n",
537 adp->total_secs / (1048576 / DEV_BSIZE),
538 vendor, product, atadev->param.revision,
539 device_get_unit(ch->dev), ata_unit2str(atadev),
540 (adp->flags & AD_F_TAG_ENABLED) ? "tagged " : "",
541 ata_mode2str(atadev->mode));
542 if (bootverbose) {
543 device_printf(dev, "%ju sectors [%juC/%dH/%dS] "
544 "%d sectors/interrupt %d depth queue\n", adp->total_secs,
545 adp->total_secs / (adp->heads * adp->sectors),
546 adp->heads, adp->sectors, atadev->max_iosize / DEV_BSIZE,
547 adp->num_tags + 1);
548 }
549 }
550
551 static int
552 ad_version(u_int16_t version)
553 {
554 int bit;
555
556 if (version == 0xffff)
557 return 0;
558 for (bit = 15; bit >= 0; bit--)
559 if (version & (1<<bit))
560 return bit;
561 return 0;
562 }
563
564 static device_method_t ad_methods[] = {
565 /* device interface */
566 DEVMETHOD(device_probe, ad_probe),
567 DEVMETHOD(device_attach, ad_attach),
568 DEVMETHOD(device_detach, ad_detach),
569 DEVMETHOD(device_shutdown, ad_shutdown),
570
571 /* ATA methods */
572 DEVMETHOD(ata_reinit, ad_reinit),
573
574 { 0, 0 }
575 };
576
577 static driver_t ad_driver = {
578 "ad",
579 ad_methods,
580 0,
581 };
582
583 devclass_t ad_devclass;
584
585 DRIVER_MODULE(ad, ata, ad_driver, ad_devclass, NULL, NULL);
586 MODULE_VERSION(ad, 1);
587 MODULE_DEPEND(ad, ata, 1, 1, 1);
Cache object: f42a86e96afbc82c9b480ec9ecede79e
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