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("$FreeBSD$");
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 <dev/pci/pcivar.h>
54 #include <ata_if.h>
55
56 /* prototypes */
57 static void ad_init(device_t dev);
58 static int ad_get_geometry(device_t dev);
59 static void ad_set_geometry(device_t dev);
60 static void ad_done(struct ata_request *request);
61 static void ad_describe(device_t dev);
62 static int ad_version(u_int16_t version);
63 static disk_strategy_t ad_strategy;
64 static disk_ioctl_t ad_ioctl;
65 static dumper_t ad_dump;
66
67 /*
68 * Most platforms map firmware geom to actual, but some don't. If
69 * not overridden, default to nothing.
70 */
71 #ifndef ata_disk_firmware_geom_adjust
72 #define ata_disk_firmware_geom_adjust(disk)
73 #endif
74
75 /* local vars */
76 static MALLOC_DEFINE(M_AD, "ad_driver", "ATA disk driver");
77
78 static int
79 ad_probe(device_t dev)
80 {
81 struct ata_device *atadev = device_get_softc(dev);
82
83 if (!(atadev->param.config & ATA_PROTO_ATAPI) ||
84 (atadev->param.config == ATA_CFA_MAGIC1) ||
85 (atadev->param.config == ATA_CFA_MAGIC2) ||
86 (atadev->param.config == ATA_CFA_MAGIC3))
87 return 0;
88 else
89 return ENXIO;
90 }
91
92 static int
93 ad_attach(device_t dev)
94 {
95 struct ata_channel *ch = device_get_softc(device_get_parent(dev));
96 struct ata_device *atadev = device_get_softc(dev);
97 struct ad_softc *adp;
98 device_t parent;
99
100 /* check that we have a virgin disk to attach */
101 if (device_get_ivars(dev))
102 return EEXIST;
103
104 if (!(adp = malloc(sizeof(struct ad_softc), M_AD, M_NOWAIT | M_ZERO))) {
105 device_printf(dev, "out of memory\n");
106 return ENOMEM;
107 }
108 device_set_ivars(dev, adp);
109
110 /* get device geometry into internal structs */
111 if (ad_get_geometry(dev))
112 return ENXIO;
113
114 /* set the max size if configured */
115 if (ata_setmax)
116 ad_set_geometry(dev);
117
118 /* init device parameters */
119 ad_init(dev);
120
121 /* announce we are here */
122 ad_describe(dev);
123
124 /* create the disk device */
125 adp->disk = disk_alloc();
126 adp->disk->d_strategy = ad_strategy;
127 adp->disk->d_ioctl = ad_ioctl;
128 adp->disk->d_dump = ad_dump;
129 adp->disk->d_name = "ad";
130 adp->disk->d_drv1 = dev;
131 adp->disk->d_maxsize = ch->dma.max_iosize ? ch->dma.max_iosize : DFLTPHYS;
132 if (atadev->param.support.command2 & ATA_SUPPORT_ADDRESS48)
133 adp->disk->d_maxsize = min(adp->disk->d_maxsize, 65536 * DEV_BSIZE);
134 else /* 28bit ATA command limit */
135 adp->disk->d_maxsize = min(adp->disk->d_maxsize, 256 * DEV_BSIZE);
136 adp->disk->d_sectorsize = DEV_BSIZE;
137 adp->disk->d_mediasize = DEV_BSIZE * (off_t)adp->total_secs;
138 adp->disk->d_fwsectors = adp->sectors;
139 adp->disk->d_fwheads = adp->heads;
140 adp->disk->d_unit = device_get_unit(dev);
141 if (atadev->param.support.command2 & ATA_SUPPORT_FLUSHCACHE)
142 adp->disk->d_flags |= DISKFLAG_CANFLUSHCACHE;
143 if ((atadev->param.support.command2 & ATA_SUPPORT_CFA) ||
144 atadev->param.config == ATA_PROTO_CFA)
145 adp->disk->d_flags |= DISKFLAG_CANDELETE;
146 strlcpy(adp->disk->d_ident, atadev->param.serial,
147 sizeof(adp->disk->d_ident));
148 strlcpy(adp->disk->d_descr, atadev->param.model,
149 sizeof(adp->disk->d_descr));
150 parent = device_get_parent(ch->dev);
151 if (parent != NULL && device_get_parent(parent) != NULL &&
152 (device_get_devclass(parent) ==
153 devclass_find("atapci") ||
154 device_get_devclass(device_get_parent(parent)) ==
155 devclass_find("pci"))) {
156 adp->disk->d_hba_vendor = pci_get_vendor(parent);
157 adp->disk->d_hba_device = pci_get_device(parent);
158 adp->disk->d_hba_subvendor = pci_get_subvendor(parent);
159 adp->disk->d_hba_subdevice = pci_get_subdevice(parent);
160 }
161 ata_disk_firmware_geom_adjust(adp->disk);
162 disk_create(adp->disk, DISK_VERSION);
163 device_add_child(dev, "subdisk", device_get_unit(dev));
164 bus_generic_attach(dev);
165
166 callout_init(&atadev->spindown_timer, 1);
167 return 0;
168 }
169
170 static int
171 ad_detach(device_t dev)
172 {
173 struct ad_softc *adp = device_get_ivars(dev);
174 struct ata_device *atadev = device_get_softc(dev);
175
176 /* check that we have a valid disk to detach */
177 if (!device_get_ivars(dev))
178 return ENXIO;
179
180 /* destroy the power timeout */
181 callout_drain(&atadev->spindown_timer);
182
183 /* detach & delete all children */
184 device_delete_children(dev);
185
186 /* destroy disk from the system so we don't get any further requests */
187 disk_destroy(adp->disk);
188
189 /* fail requests on the queue and any that's "in flight" for this device */
190 ata_fail_requests(dev);
191
192 /* don't leave anything behind */
193 device_set_ivars(dev, NULL);
194 free(adp, M_AD);
195 return 0;
196 }
197
198 static int
199 ad_shutdown(device_t dev)
200 {
201 struct ata_device *atadev = device_get_softc(dev);
202
203 if (atadev->param.support.command2 & ATA_SUPPORT_FLUSHCACHE)
204 ata_controlcmd(dev, ATA_FLUSHCACHE, 0, 0, 0);
205 return 0;
206 }
207
208 static int
209 ad_reinit(device_t dev)
210 {
211 struct ata_channel *ch = device_get_softc(device_get_parent(dev));
212 struct ata_device *atadev = device_get_softc(dev);
213
214 /* if detach pending, return error */
215 if (!(ch->devices & (ATA_ATA_MASTER << atadev->unit)))
216 return 1;
217
218 ad_init(dev);
219 return 0;
220 }
221
222 static void
223 ad_power_callback(struct ata_request *request)
224 {
225 device_printf(request->dev, "drive spun down.\n");
226 ata_free_request(request);
227 }
228
229 static void
230 ad_spindown(void *priv)
231 {
232 device_t dev = priv;
233 struct ata_device *atadev = device_get_softc(dev);
234 struct ata_request *request;
235
236 if (!atadev->spindown)
237 return;
238 device_printf(dev, "Idle, spin down\n");
239 atadev->spindown_state = 1;
240 if (!(request = ata_alloc_request())) {
241 device_printf(dev, "FAILURE - out of memory in ad_spindown\n");
242 return;
243 }
244 request->dev = dev;
245 request->flags = ATA_R_CONTROL;
246 request->timeout = ATA_REQUEST_TIMEOUT;
247 request->retries = 1;
248 request->callback = ad_power_callback;
249 request->u.ata.command = ATA_STANDBY_IMMEDIATE;
250 ata_queue_request(request);
251 }
252
253
254 static void
255 ad_strategy(struct bio *bp)
256 {
257 device_t dev = bp->bio_disk->d_drv1;
258 struct ata_device *atadev = device_get_softc(dev);
259 struct ata_request *request;
260
261 if (atadev->spindown)
262 callout_reset(&atadev->spindown_timer, hz * atadev->spindown,
263 ad_spindown, dev);
264
265 if (!(request = ata_alloc_request())) {
266 device_printf(dev, "FAILURE - out of memory in start\n");
267 biofinish(bp, NULL, ENOMEM);
268 return;
269 }
270
271 /* setup request */
272 request->dev = dev;
273 request->bio = bp;
274 request->callback = ad_done;
275 if (atadev->spindown_state) {
276 device_printf(dev, "request while spun down, starting.\n");
277 atadev->spindown_state = 0;
278 request->timeout = MAX(ATA_REQUEST_TIMEOUT, 31);
279 }
280 else {
281 request->timeout = ATA_REQUEST_TIMEOUT;
282 }
283 request->retries = 2;
284 request->data = bp->bio_data;
285 request->bytecount = bp->bio_bcount;
286 request->u.ata.lba = bp->bio_pblkno;
287 request->u.ata.count = request->bytecount / DEV_BSIZE;
288 request->transfersize = min(bp->bio_bcount, atadev->max_iosize);
289
290 switch (bp->bio_cmd) {
291 case BIO_READ:
292 request->flags = ATA_R_READ;
293 if (atadev->mode >= ATA_DMA) {
294 request->u.ata.command = ATA_READ_DMA;
295 request->flags |= ATA_R_DMA;
296 }
297 else if (request->transfersize > DEV_BSIZE)
298 request->u.ata.command = ATA_READ_MUL;
299 else
300 request->u.ata.command = ATA_READ;
301 break;
302 case BIO_WRITE:
303 request->flags = ATA_R_WRITE;
304 if (atadev->mode >= ATA_DMA) {
305 request->u.ata.command = ATA_WRITE_DMA;
306 request->flags |= ATA_R_DMA;
307 }
308 else if (request->transfersize > DEV_BSIZE)
309 request->u.ata.command = ATA_WRITE_MUL;
310 else
311 request->u.ata.command = ATA_WRITE;
312 break;
313 case BIO_DELETE:
314 request->flags = ATA_R_CONTROL;
315 request->u.ata.command = ATA_CFA_ERASE;
316 request->transfersize = 0;
317 request->donecount = bp->bio_bcount;
318 break;
319 case BIO_FLUSH:
320 request->u.ata.lba = 0;
321 request->u.ata.count = 0;
322 request->u.ata.feature = 0;
323 request->bytecount = 0;
324 request->transfersize = 0;
325 request->flags = ATA_R_CONTROL;
326 request->u.ata.command = ATA_FLUSHCACHE;
327 break;
328 default:
329 device_printf(dev, "FAILURE - unknown BIO operation\n");
330 ata_free_request(request);
331 biofinish(bp, NULL, EIO);
332 return;
333 }
334 request->flags |= ATA_R_ORDERED;
335 ata_queue_request(request);
336 }
337
338 static void
339 ad_done(struct ata_request *request)
340 {
341 struct bio *bp = request->bio;
342
343 /* finish up transfer */
344 if ((bp->bio_error = request->result))
345 bp->bio_flags |= BIO_ERROR;
346 bp->bio_resid = bp->bio_bcount - request->donecount;
347 biodone(bp);
348 ata_free_request(request);
349 }
350
351 static int
352 ad_ioctl(struct disk *disk, u_long cmd, void *data, int flag, struct thread *td)
353 {
354 return ata_device_ioctl(disk->d_drv1, cmd, data);
355 }
356
357 static int
358 ad_dump(void *arg, void *virtual, vm_offset_t physical,
359 off_t offset, size_t length)
360 {
361 struct disk *dp = arg;
362 device_t dev = dp->d_drv1;
363 struct bio bp;
364
365 /* XXX: Drop pre-dump request queue. Long request queue processing
366 * causes stack overflow in ATA working in dumping (interruptless) mode.
367 * Conter-XXX: To make dump coherent we should avoid doing anything
368 * else while dumping.
369 */
370 ata_drop_requests(dev);
371
372 /* length zero is special and really means flush buffers to media */
373 if (!length) {
374 struct ata_device *atadev = device_get_softc(dev);
375 int error = 0;
376
377 if (atadev->param.support.command2 & ATA_SUPPORT_FLUSHCACHE)
378 error = ata_controlcmd(dev, ATA_FLUSHCACHE, 0, 0, 0);
379 return error;
380 }
381
382 bzero(&bp, sizeof(struct bio));
383 bp.bio_disk = dp;
384 bp.bio_pblkno = offset / DEV_BSIZE;
385 bp.bio_bcount = length;
386 bp.bio_data = virtual;
387 bp.bio_cmd = BIO_WRITE;
388 ad_strategy(&bp);
389 return bp.bio_error;
390 }
391
392 static void
393 ad_init(device_t dev)
394 {
395 struct ata_device *atadev = device_get_softc(dev);
396
397 ata_setmode(dev);
398
399 /* enable readahead caching */
400 if (atadev->param.support.command1 & ATA_SUPPORT_LOOKAHEAD)
401 ata_controlcmd(dev, ATA_SETFEATURES, ATA_SF_ENAB_RCACHE, 0, 0);
402
403 /* enable write caching if supported and configured */
404 if (atadev->param.support.command1 & ATA_SUPPORT_WRITECACHE) {
405 if (ata_wc)
406 ata_controlcmd(dev, ATA_SETFEATURES, ATA_SF_ENAB_WCACHE, 0, 0);
407 else
408 ata_controlcmd(dev, ATA_SETFEATURES, ATA_SF_DIS_WCACHE, 0, 0);
409 }
410
411 /* use multiple sectors/interrupt if device supports it */
412 if (ad_version(atadev->param.version_major)) {
413 int secsperint = max(1, min(atadev->param.sectors_intr & 0xff, 16));
414
415 if (!ata_controlcmd(dev, ATA_SET_MULTI, 0, 0, secsperint))
416 atadev->max_iosize = secsperint * DEV_BSIZE;
417 else
418 atadev->max_iosize = DEV_BSIZE;
419 }
420 else
421 atadev->max_iosize = DEV_BSIZE;
422 }
423
424 static int
425 ad_get_geometry(device_t dev)
426 {
427 struct ata_device *atadev = device_get_softc(dev);
428 struct ad_softc *adp = device_get_ivars(dev);
429 u_int64_t lbasize48;
430 u_int32_t lbasize;
431
432 if ((atadev->param.atavalid & ATA_FLAG_54_58) &&
433 atadev->param.current_heads && atadev->param.current_sectors) {
434 adp->heads = atadev->param.current_heads;
435 adp->sectors = atadev->param.current_sectors;
436 adp->total_secs = (u_int32_t)atadev->param.current_size_1 |
437 ((u_int32_t)atadev->param.current_size_2 << 16);
438 }
439 else {
440 adp->heads = atadev->param.heads;
441 adp->sectors = atadev->param.sectors;
442 adp->total_secs = atadev->param.cylinders * adp->heads * adp->sectors;
443 }
444 lbasize = (u_int32_t)atadev->param.lba_size_1 |
445 ((u_int32_t)atadev->param.lba_size_2 << 16);
446 /* This device exists, but has no size. Filter out this bogus device. */
447 if (!lbasize && !adp->total_secs)
448 return ENXIO;
449
450 /* does this device need oldstyle CHS addressing */
451 if (!ad_version(atadev->param.version_major) || !lbasize)
452 atadev->flags |= ATA_D_USE_CHS;
453
454 /* use the 28bit LBA size if valid or bigger than the CHS mapping */
455 if (atadev->param.cylinders == 16383 || adp->total_secs < lbasize)
456 adp->total_secs = lbasize;
457
458 /* use the 48bit LBA size if valid */
459 lbasize48 = ((u_int64_t)atadev->param.lba_size48_1) |
460 ((u_int64_t)atadev->param.lba_size48_2 << 16) |
461 ((u_int64_t)atadev->param.lba_size48_3 << 32) |
462 ((u_int64_t)atadev->param.lba_size48_4 << 48);
463 if ((atadev->param.support.command2 & ATA_SUPPORT_ADDRESS48) &&
464 lbasize48 > ATA_MAX_28BIT_LBA)
465 adp->total_secs = lbasize48;
466 return 0;
467 }
468
469 static void
470 ad_set_geometry(device_t dev)
471 {
472 struct ad_softc *adp = device_get_ivars(dev);
473 struct ata_request *request;
474
475 if (1 | bootverbose)
476 device_printf(dev, "ORG %ju sectors [%juC/%dH/%dS]\n", adp->total_secs,
477 adp->total_secs / (adp->heads * adp->sectors),
478 adp->heads, adp->sectors);
479
480 if (!(request = ata_alloc_request()))
481 return;
482
483 /* get the max native size the device supports */
484 request->dev = dev;
485 request->u.ata.command = ATA_READ_NATIVE_MAX_ADDRESS;
486 request->u.ata.lba = 0;
487 request->u.ata.count = 0;
488 request->u.ata.feature = 0;
489 request->flags = ATA_R_CONTROL | ATA_R_QUIET;
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 if (1 | bootverbose)
497 device_printf(dev, "MAX %ju sectors\n", request->u.ata.lba + 1);
498
499 /* if original size equals max size nothing more todo */
500 if (adp->total_secs >= request->u.ata.lba)
501 goto out;
502
503 /* set the max native size to its max */
504 request->dev = dev;
505 request->u.ata.command = ATA_SET_MAX_ADDRESS;
506 request->u.ata.count = 1;
507 request->u.ata.feature = 0;
508 request->flags = ATA_R_CONTROL;
509 request->timeout = ATA_REQUEST_TIMEOUT;
510 request->retries = 0;
511 ata_queue_request(request);
512 if (request->status & ATA_S_ERROR)
513 goto out;
514
515 /* refresh geometry from drive */
516 ata_getparam(device_get_softc(dev), 0);
517 ad_get_geometry(dev);
518 if (1 | bootverbose)
519 device_printf(dev, "NEW %ju sectors [%juC/%dH/%dS]\n", adp->total_secs,
520 adp->total_secs / (adp->heads * adp->sectors),
521 adp->heads, adp->sectors);
522 out:
523 ata_free_request(request);
524 }
525
526 static void
527 ad_describe(device_t dev)
528 {
529 struct ata_channel *ch = device_get_softc(device_get_parent(dev));
530 struct ata_device *atadev = device_get_softc(dev);
531 struct ad_softc *adp = device_get_ivars(dev);
532 u_int8_t *marker, vendor[64], product[64];
533
534 /* try to separate the ATA model string into vendor and model parts */
535 if ((marker = index(atadev->param.model, ' ')) ||
536 (marker = index(atadev->param.model, '-'))) {
537 int len = (marker - atadev->param.model);
538
539 strncpy(vendor, atadev->param.model, len);
540 vendor[len++] = 0;
541 strcat(vendor, " ");
542 strncpy(product, atadev->param.model + len, 40 - len);
543 vendor[40 - len] = 0;
544 }
545 else {
546 if (!strncmp(atadev->param.model, "ST", 2))
547 strcpy(vendor, "Seagate ");
548 else if (!strncmp(atadev->param.model, "HDS", 3))
549 strcpy(vendor, "Hitachi ");
550 else
551 strcpy(vendor, "");
552 strncpy(product, atadev->param.model, 40);
553 }
554
555 device_printf(dev, "%juMB <%s%s %.8s> at ata%d-%s %s%s %s\n",
556 adp->total_secs / (1048576 / DEV_BSIZE),
557 vendor, product, atadev->param.revision,
558 device_get_unit(ch->dev), ata_unit2str(atadev),
559 (adp->flags & AD_F_TAG_ENABLED) ? "tagged " : "",
560 ata_mode2str(atadev->mode),
561 ata_satarev2str(ATA_GETREV(device_get_parent(dev), atadev->unit)));
562 if (bootverbose) {
563 device_printf(dev, "%ju sectors [%juC/%dH/%dS] "
564 "%d sectors/interrupt %d depth queue\n", adp->total_secs,
565 adp->total_secs / (adp->heads * adp->sectors),
566 adp->heads, adp->sectors, atadev->max_iosize / DEV_BSIZE,
567 adp->num_tags + 1);
568 }
569 }
570
571 static int
572 ad_version(u_int16_t version)
573 {
574 int bit;
575
576 if (version == 0xffff)
577 return 0;
578 for (bit = 15; bit >= 0; bit--)
579 if (version & (1<<bit))
580 return bit;
581 return 0;
582 }
583
584 static device_method_t ad_methods[] = {
585 /* device interface */
586 DEVMETHOD(device_probe, ad_probe),
587 DEVMETHOD(device_attach, ad_attach),
588 DEVMETHOD(device_detach, ad_detach),
589 DEVMETHOD(device_shutdown, ad_shutdown),
590
591 /* ATA methods */
592 DEVMETHOD(ata_reinit, ad_reinit),
593
594 DEVMETHOD_END
595 };
596
597 static driver_t ad_driver = {
598 "ad",
599 ad_methods,
600 0,
601 };
602
603 devclass_t ad_devclass;
604
605 DRIVER_MODULE(ad, ata, ad_driver, ad_devclass, NULL, NULL);
606 MODULE_VERSION(ad, 1);
607 MODULE_DEPEND(ad, ata, 1, 1, 1);
Cache object: 4025930e8c707d2cc1a3b3aadb10b655
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