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dm: calculate queue limits during resume not load
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ide / ide-disk.c
blob695181120cdb9f14d0a16740c901345d599d052b
1 /*
2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
3 * Copyright (C) 1998-2002 Linux ATA Development
4 * Andre Hedrick <andre@linux-ide.org>
5 * Copyright (C) 2003 Red Hat
6 * Copyright (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz
7 */
8
9 /*
10 * Mostly written by Mark Lord <mlord@pobox.com>
11 * and Gadi Oxman <gadio@netvision.net.il>
12 * and Andre Hedrick <andre@linux-ide.org>
13 *
14 * This is the IDE/ATA disk driver, as evolved from hd.c and ide.c.
15 */
16
17 #include <linux/types.h>
18 #include <linux/string.h>
19 #include <linux/kernel.h>
20 #include <linux/timer.h>
21 #include <linux/mm.h>
22 #include <linux/interrupt.h>
23 #include <linux/major.h>
24 #include <linux/errno.h>
25 #include <linux/genhd.h>
26 #include <linux/slab.h>
27 #include <linux/delay.h>
28 #include <linux/mutex.h>
29 #include <linux/leds.h>
30 #include <linux/ide.h>
31
32 #include <asm/byteorder.h>
33 #include <asm/irq.h>
34 #include <asm/uaccess.h>
35 #include <asm/io.h>
36 #include <asm/div64.h>
37
38 #include "ide-disk.h"
39
40 static const u8 ide_rw_cmds[] = {
41 ATA_CMD_READ_MULTI,
42 ATA_CMD_WRITE_MULTI,
43 ATA_CMD_READ_MULTI_EXT,
44 ATA_CMD_WRITE_MULTI_EXT,
45 ATA_CMD_PIO_READ,
46 ATA_CMD_PIO_WRITE,
47 ATA_CMD_PIO_READ_EXT,
48 ATA_CMD_PIO_WRITE_EXT,
49 ATA_CMD_READ,
50 ATA_CMD_WRITE,
51 ATA_CMD_READ_EXT,
52 ATA_CMD_WRITE_EXT,
53 };
54
55 static void ide_tf_set_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 dma)
56 {
57 u8 index, lba48, write;
58
59 lba48 = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 2 : 0;
60 write = (cmd->tf_flags & IDE_TFLAG_WRITE) ? 1 : 0;
61
62 if (dma) {
63 cmd->protocol = ATA_PROT_DMA;
64 index = 8;
65 } else {
66 cmd->protocol = ATA_PROT_PIO;
67 if (drive->mult_count) {
68 cmd->tf_flags |= IDE_TFLAG_MULTI_PIO;
69 index = 0;
70 } else
71 index = 4;
72 }
73
74 cmd->tf.command = ide_rw_cmds[index + lba48 + write];
75 }
76
77 /*
78 * __ide_do_rw_disk() issues READ and WRITE commands to a disk,
79 * using LBA if supported, or CHS otherwise, to address sectors.
80 */
81 static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
82 sector_t block)
83 {
84 ide_hwif_t *hwif = drive->hwif;
85 u16 nsectors = (u16)blk_rq_sectors(rq);
86 u8 lba48 = !!(drive->dev_flags & IDE_DFLAG_LBA48);
87 u8 dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
88 struct ide_cmd cmd;
89 struct ide_taskfile *tf = &cmd.tf;
90 ide_startstop_t rc;
91
92 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) {
93 if (block + blk_rq_sectors(rq) > 1ULL << 28)
94 dma = 0;
95 else
96 lba48 = 0;
97 }
98
99 memset(&cmd, 0, sizeof(cmd));
100 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
101 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
102
103 if (drive->dev_flags & IDE_DFLAG_LBA) {
104 if (lba48) {
105 pr_debug("%s: LBA=0x%012llx\n", drive->name,
106 (unsigned long long)block);
107
108 tf->nsect = nsectors & 0xff;
109 tf->lbal = (u8) block;
110 tf->lbam = (u8)(block >> 8);
111 tf->lbah = (u8)(block >> 16);
112 tf->device = ATA_LBA;
113
114 tf = &cmd.hob;
115 tf->nsect = (nsectors >> 8) & 0xff;
116 tf->lbal = (u8)(block >> 24);
117 if (sizeof(block) != 4) {
118 tf->lbam = (u8)((u64)block >> 32);
119 tf->lbah = (u8)((u64)block >> 40);
120 }
121
122 cmd.valid.out.hob = IDE_VALID_OUT_HOB;
123 cmd.valid.in.hob = IDE_VALID_IN_HOB;
124 cmd.tf_flags |= IDE_TFLAG_LBA48;
125 } else {
126 tf->nsect = nsectors & 0xff;
127 tf->lbal = block;
128 tf->lbam = block >>= 8;
129 tf->lbah = block >>= 8;
130 tf->device = ((block >> 8) & 0xf) | ATA_LBA;
131 }
132 } else {
133 unsigned int sect, head, cyl, track;
134
135 track = (int)block / drive->sect;
136 sect = (int)block % drive->sect + 1;
137 head = track % drive->head;
138 cyl = track / drive->head;
139
140 pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect);
141
142 tf->nsect = nsectors & 0xff;
143 tf->lbal = sect;
144 tf->lbam = cyl;
145 tf->lbah = cyl >> 8;
146 tf->device = head;
147 }
148
149 cmd.tf_flags |= IDE_TFLAG_FS;
150
151 if (rq_data_dir(rq))
152 cmd.tf_flags |= IDE_TFLAG_WRITE;
153
154 ide_tf_set_cmd(drive, &cmd, dma);
155 cmd.rq = rq;
156
157 if (dma == 0) {
158 ide_init_sg_cmd(&cmd, nsectors << 9);
159 ide_map_sg(drive, &cmd);
160 }
161
162 rc = do_rw_taskfile(drive, &cmd);
163
164 if (rc == ide_stopped && dma) {
165 /* fallback to PIO */
166 cmd.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK;
167 ide_tf_set_cmd(drive, &cmd, 0);
168 ide_init_sg_cmd(&cmd, nsectors << 9);
169 rc = do_rw_taskfile(drive, &cmd);
170 }
171
172 return rc;
173 }
174
175 /*
176 * 268435455 == 137439 MB or 28bit limit
177 * 320173056 == 163929 MB or 48bit addressing
178 * 1073741822 == 549756 MB or 48bit addressing fake drive
179 */
180
181 static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
182 sector_t block)
183 {
184 ide_hwif_t *hwif = drive->hwif;
185
186 BUG_ON(drive->dev_flags & IDE_DFLAG_BLOCKED);
187 BUG_ON(!blk_fs_request(rq));
188
189 ledtrig_ide_activity();
190
191 pr_debug("%s: %sing: block=%llu, sectors=%u, buffer=0x%08lx\n",
192 drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
193 (unsigned long long)block, blk_rq_sectors(rq),
194 (unsigned long)rq->buffer);
195
196 if (hwif->rw_disk)
197 hwif->rw_disk(drive, rq);
198
199 return __ide_do_rw_disk(drive, rq, block);
200 }
201
202 /*
203 * Queries for true maximum capacity of the drive.
204 * Returns maximum LBA address (> 0) of the drive, 0 if failed.
205 */
206 static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48)
207 {
208 struct ide_cmd cmd;
209 struct ide_taskfile *tf = &cmd.tf;
210 u64 addr = 0;
211
212 memset(&cmd, 0, sizeof(cmd));
213 if (lba48)
214 tf->command = ATA_CMD_READ_NATIVE_MAX_EXT;
215 else
216 tf->command = ATA_CMD_READ_NATIVE_MAX;
217 tf->device = ATA_LBA;
218
219 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
220 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
221 if (lba48) {
222 cmd.valid.out.hob = IDE_VALID_OUT_HOB;
223 cmd.valid.in.hob = IDE_VALID_IN_HOB;
224 cmd.tf_flags = IDE_TFLAG_LBA48;
225 }
226
227 ide_no_data_taskfile(drive, &cmd);
228
229 /* if OK, compute maximum address value */
230 if (!(tf->status & ATA_ERR))
231 addr = ide_get_lba_addr(&cmd, lba48) + 1;
232
233 return addr;
234 }
235
236 /*
237 * Sets maximum virtual LBA address of the drive.
238 * Returns new maximum virtual LBA address (> 0) or 0 on failure.
239 */
240 static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48)
241 {
242 struct ide_cmd cmd;
243 struct ide_taskfile *tf = &cmd.tf;
244 u64 addr_set = 0;
245
246 addr_req--;
247
248 memset(&cmd, 0, sizeof(cmd));
249 tf->lbal = (addr_req >> 0) & 0xff;
250 tf->lbam = (addr_req >>= 8) & 0xff;
251 tf->lbah = (addr_req >>= 8) & 0xff;
252 if (lba48) {
253 cmd.hob.lbal = (addr_req >>= 8) & 0xff;
254 cmd.hob.lbam = (addr_req >>= 8) & 0xff;
255 cmd.hob.lbah = (addr_req >>= 8) & 0xff;
256 tf->command = ATA_CMD_SET_MAX_EXT;
257 } else {
258 tf->device = (addr_req >>= 8) & 0x0f;
259 tf->command = ATA_CMD_SET_MAX;
260 }
261 tf->device |= ATA_LBA;
262
263 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
264 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
265 if (lba48) {
266 cmd.valid.out.hob = IDE_VALID_OUT_HOB;
267 cmd.valid.in.hob = IDE_VALID_IN_HOB;
268 cmd.tf_flags = IDE_TFLAG_LBA48;
269 }
270
271 ide_no_data_taskfile(drive, &cmd);
272
273 /* if OK, compute maximum address value */
274 if (!(tf->status & ATA_ERR))
275 addr_set = ide_get_lba_addr(&cmd, lba48) + 1;
276
277 return addr_set;
278 }
279
280 static unsigned long long sectors_to_MB(unsigned long long n)
281 {
282 n <<= 9; /* make it bytes */
283 do_div(n, 1000000); /* make it MB */
284 return n;
285 }
286
287 /*
288 * Some disks report total number of sectors instead of
289 * maximum sector address. We list them here.
290 */
291 static const struct drive_list_entry hpa_list[] = {
292 { "ST340823A", NULL },
293 { "ST320413A", NULL },
294 { "ST310211A", NULL },
295 { NULL, NULL }
296 };
297
298 static u64 ide_disk_hpa_get_native_capacity(ide_drive_t *drive, int lba48)
299 {
300 u64 capacity, set_max;
301
302 capacity = drive->capacity64;
303 set_max = idedisk_read_native_max_address(drive, lba48);
304
305 if (ide_in_drive_list(drive->id, hpa_list)) {
306 /*
307 * Since we are inclusive wrt to firmware revisions do this
308 * extra check and apply the workaround only when needed.
309 */
310 if (set_max == capacity + 1)
311 set_max--;
312 }
313
314 return set_max;
315 }
316
317 static u64 ide_disk_hpa_set_capacity(ide_drive_t *drive, u64 set_max, int lba48)
318 {
319 set_max = idedisk_set_max_address(drive, set_max, lba48);
320 if (set_max)
321 drive->capacity64 = set_max;
322
323 return set_max;
324 }
325
326 static void idedisk_check_hpa(ide_drive_t *drive)
327 {
328 u64 capacity, set_max;
329 int lba48 = ata_id_lba48_enabled(drive->id);
330
331 capacity = drive->capacity64;
332 set_max = ide_disk_hpa_get_native_capacity(drive, lba48);
333
334 if (set_max <= capacity)
335 return;
336
337 drive->probed_capacity = set_max;
338
339 printk(KERN_INFO "%s: Host Protected Area detected.\n"
340 "\tcurrent capacity is %llu sectors (%llu MB)\n"
341 "\tnative capacity is %llu sectors (%llu MB)\n",
342 drive->name,
343 capacity, sectors_to_MB(capacity),
344 set_max, sectors_to_MB(set_max));
345
346 if ((drive->dev_flags & IDE_DFLAG_NOHPA) == 0)
347 return;
348
349 set_max = ide_disk_hpa_set_capacity(drive, set_max, lba48);
350 if (set_max)
351 printk(KERN_INFO "%s: Host Protected Area disabled.\n",
352 drive->name);
353 }
354
355 static int ide_disk_get_capacity(ide_drive_t *drive)
356 {
357 u16 *id = drive->id;
358 int lba;
359
360 if (ata_id_lba48_enabled(id)) {
361 /* drive speaks 48-bit LBA */
362 lba = 1;
363 drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
364 } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) {
365 /* drive speaks 28-bit LBA */
366 lba = 1;
367 drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
368 } else {
369 /* drive speaks boring old 28-bit CHS */
370 lba = 0;
371 drive->capacity64 = drive->cyl * drive->head * drive->sect;
372 }
373
374 drive->probed_capacity = drive->capacity64;
375
376 if (lba) {
377 drive->dev_flags |= IDE_DFLAG_LBA;
378
379 /*
380 * If this device supports the Host Protected Area feature set,
381 * then we may need to change our opinion about its capacity.
382 */
383 if (ata_id_hpa_enabled(id))
384 idedisk_check_hpa(drive);
385 }
386
387 /* limit drive capacity to 137GB if LBA48 cannot be used */
388 if ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 &&
389 drive->capacity64 > 1ULL << 28) {
390 printk(KERN_WARNING "%s: cannot use LBA48 - full capacity "
391 "%llu sectors (%llu MB)\n",
392 drive->name, (unsigned long long)drive->capacity64,
393 sectors_to_MB(drive->capacity64));
394 drive->probed_capacity = drive->capacity64 = 1ULL << 28;
395 }
396
397 if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) &&
398 (drive->dev_flags & IDE_DFLAG_LBA48)) {
399 if (drive->capacity64 > 1ULL << 28) {
400 printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode"
401 " will be used for accessing sectors "
402 "> %u\n", drive->name, 1 << 28);
403 } else
404 drive->dev_flags &= ~IDE_DFLAG_LBA48;
405 }
406
407 return 0;
408 }
409
410 static u64 ide_disk_set_capacity(ide_drive_t *drive, u64 capacity)
411 {
412 u64 set = min(capacity, drive->probed_capacity);
413 u16 *id = drive->id;
414 int lba48 = ata_id_lba48_enabled(id);
415
416 if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 ||
417 ata_id_hpa_enabled(id) == 0)
418 goto out;
419
420 /*
421 * according to the spec the SET MAX ADDRESS command shall be
422 * immediately preceded by a READ NATIVE MAX ADDRESS command
423 */
424 capacity = ide_disk_hpa_get_native_capacity(drive, lba48);
425 if (capacity == 0)
426 goto out;
427
428 set = ide_disk_hpa_set_capacity(drive, set, lba48);
429 if (set) {
430 /* needed for ->resume to disable HPA */
431 drive->dev_flags |= IDE_DFLAG_NOHPA;
432 return set;
433 }
434 out:
435 return drive->capacity64;
436 }
437
438 static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
439 {
440 ide_drive_t *drive = q->queuedata;
441 struct ide_cmd *cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);
442
443 /* FIXME: map struct ide_taskfile on rq->cmd[] */
444 BUG_ON(cmd == NULL);
445
446 memset(cmd, 0, sizeof(*cmd));
447 if (ata_id_flush_ext_enabled(drive->id) &&
448 (drive->capacity64 >= (1UL << 28)))
449 cmd->tf.command = ATA_CMD_FLUSH_EXT;
450 else
451 cmd->tf.command = ATA_CMD_FLUSH;
452 cmd->valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
453 cmd->tf_flags = IDE_TFLAG_DYN;
454 cmd->protocol = ATA_PROT_NODATA;
455
456 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
457 rq->special = cmd;
458 }
459
460 ide_devset_get(multcount, mult_count);
461
462 /*
463 * This is tightly woven into the driver->do_special can not touch.
464 * DON'T do it again until a total personality rewrite is committed.
465 */
466 static int set_multcount(ide_drive_t *drive, int arg)
467 {
468 struct request *rq;
469 int error;
470
471 if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff))
472 return -EINVAL;
473
474 if (drive->special_flags & IDE_SFLAG_SET_MULTMODE)
475 return -EBUSY;
476
477 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
478 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
479
480 drive->mult_req = arg;
481 drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
482 error = blk_execute_rq(drive->queue, NULL, rq, 0);
483 blk_put_request(rq);
484
485 return (drive->mult_count == arg) ? 0 : -EIO;
486 }
487
488 ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR);
489
490 static int set_nowerr(ide_drive_t *drive, int arg)
491 {
492 if (arg < 0 || arg > 1)
493 return -EINVAL;
494
495 if (arg)
496 drive->dev_flags |= IDE_DFLAG_NOWERR;
497 else
498 drive->dev_flags &= ~IDE_DFLAG_NOWERR;
499
500 drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
501
502 return 0;
503 }
504
505 static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect)
506 {
507 struct ide_cmd cmd;
508
509 memset(&cmd, 0, sizeof(cmd));
510 cmd.tf.feature = feature;
511 cmd.tf.nsect = nsect;
512 cmd.tf.command = ATA_CMD_SET_FEATURES;
513 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
514 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
515
516 return ide_no_data_taskfile(drive, &cmd);
517 }
518
519 static void update_ordered(ide_drive_t *drive)
520 {
521 u16 *id = drive->id;
522 unsigned ordered = QUEUE_ORDERED_NONE;
523 prepare_flush_fn *prep_fn = NULL;
524
525 if (drive->dev_flags & IDE_DFLAG_WCACHE) {
526 unsigned long long capacity;
527 int barrier;
528 /*
529 * We must avoid issuing commands a drive does not
530 * understand or we may crash it. We check flush cache
531 * is supported. We also check we have the LBA48 flush
532 * cache if the drive capacity is too large. By this
533 * time we have trimmed the drive capacity if LBA48 is
534 * not available so we don't need to recheck that.
535 */
536 capacity = ide_gd_capacity(drive);
537 barrier = ata_id_flush_enabled(id) &&
538 (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 &&
539 ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 ||
540 capacity <= (1ULL << 28) ||
541 ata_id_flush_ext_enabled(id));
542
543 printk(KERN_INFO "%s: cache flushes %ssupported\n",
544 drive->name, barrier ? "" : "not ");
545
546 if (barrier) {
547 ordered = QUEUE_ORDERED_DRAIN_FLUSH;
548 prep_fn = idedisk_prepare_flush;
549 }
550 } else
551 ordered = QUEUE_ORDERED_DRAIN;
552
553 blk_queue_ordered(drive->queue, ordered, prep_fn);
554 }
555
556 ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE);
557
558 static int set_wcache(ide_drive_t *drive, int arg)
559 {
560 int err = 1;
561
562 if (arg < 0 || arg > 1)
563 return -EINVAL;
564
565 if (ata_id_flush_enabled(drive->id)) {
566 err = ide_do_setfeature(drive,
567 arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0);
568 if (err == 0) {
569 if (arg)
570 drive->dev_flags |= IDE_DFLAG_WCACHE;
571 else
572 drive->dev_flags &= ~IDE_DFLAG_WCACHE;
573 }
574 }
575
576 update_ordered(drive);
577
578 return err;
579 }
580
581 static int do_idedisk_flushcache(ide_drive_t *drive)
582 {
583 struct ide_cmd cmd;
584
585 memset(&cmd, 0, sizeof(cmd));
586 if (ata_id_flush_ext_enabled(drive->id))
587 cmd.tf.command = ATA_CMD_FLUSH_EXT;
588 else
589 cmd.tf.command = ATA_CMD_FLUSH;
590 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
591 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
592
593 return ide_no_data_taskfile(drive, &cmd);
594 }
595
596 ide_devset_get(acoustic, acoustic);
597
598 static int set_acoustic(ide_drive_t *drive, int arg)
599 {
600 if (arg < 0 || arg > 254)
601 return -EINVAL;
602
603 ide_do_setfeature(drive,
604 arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg);
605
606 drive->acoustic = arg;
607
608 return 0;
609 }
610
611 ide_devset_get_flag(addressing, IDE_DFLAG_LBA48);
612
613 /*
614 * drive->addressing:
615 * 0: 28-bit
616 * 1: 48-bit
617 * 2: 48-bit capable doing 28-bit
618 */
619 static int set_addressing(ide_drive_t *drive, int arg)
620 {
621 if (arg < 0 || arg > 2)
622 return -EINVAL;
623
624 if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
625 ata_id_lba48_enabled(drive->id) == 0))
626 return -EIO;
627
628 if (arg == 2)
629 arg = 0;
630
631 if (arg)
632 drive->dev_flags |= IDE_DFLAG_LBA48;
633 else
634 drive->dev_flags &= ~IDE_DFLAG_LBA48;
635
636 return 0;
637 }
638
639 ide_ext_devset_rw(acoustic, acoustic);
640 ide_ext_devset_rw(address, addressing);
641 ide_ext_devset_rw(multcount, multcount);
642 ide_ext_devset_rw(wcache, wcache);
643
644 ide_ext_devset_rw_sync(nowerr, nowerr);
645
646 static int ide_disk_check(ide_drive_t *drive, const char *s)
647 {
648 return 1;
649 }
650
651 static void ide_disk_setup(ide_drive_t *drive)
652 {
653 struct ide_disk_obj *idkp = drive->driver_data;
654 struct request_queue *q = drive->queue;
655 ide_hwif_t *hwif = drive->hwif;
656 u16 *id = drive->id;
657 char *m = (char *)&id[ATA_ID_PROD];
658 unsigned long long capacity;
659
660 ide_proc_register_driver(drive, idkp->driver);
661
662 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0)
663 return;
664
665 if (drive->dev_flags & IDE_DFLAG_REMOVABLE) {
666 /*
667 * Removable disks (eg. SYQUEST); ignore 'WD' drives
668 */
669 if (m[0] != 'W' || m[1] != 'D')
670 drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
671 }
672
673 (void)set_addressing(drive, 1);
674
675 if (drive->dev_flags & IDE_DFLAG_LBA48) {
676 int max_s = 2048;
677
678 if (max_s > hwif->rqsize)
679 max_s = hwif->rqsize;
680
681 blk_queue_max_sectors(q, max_s);
682 }
683
684 printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name,
685 queue_max_sectors(q) / 2);
686
687 if (ata_id_is_ssd(id))
688 queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
689
690 /* calculate drive capacity, and select LBA if possible */
691 ide_disk_get_capacity(drive);
692
693 /*
694 * if possible, give fdisk access to more of the drive,
695 * by correcting bios_cyls:
696 */
697 capacity = ide_gd_capacity(drive);
698
699 if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) {
700 if (ata_id_lba48_enabled(drive->id)) {
701 /* compatibility */
702 drive->bios_sect = 63;
703 drive->bios_head = 255;
704 }
705
706 if (drive->bios_sect && drive->bios_head) {
707 unsigned int cap0 = capacity; /* truncate to 32 bits */
708 unsigned int cylsz, cyl;
709
710 if (cap0 != capacity)
711 drive->bios_cyl = 65535;
712 else {
713 cylsz = drive->bios_sect * drive->bios_head;
714 cyl = cap0 / cylsz;
715 if (cyl > 65535)
716 cyl = 65535;
717 if (cyl > drive->bios_cyl)
718 drive->bios_cyl = cyl;
719 }
720 }
721 }
722 printk(KERN_INFO "%s: %llu sectors (%llu MB)",
723 drive->name, capacity, sectors_to_MB(capacity));
724
725 /* Only print cache size when it was specified */
726 if (id[ATA_ID_BUF_SIZE])
727 printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2);
728
729 printk(KERN_CONT ", CHS=%d/%d/%d\n",
730 drive->bios_cyl, drive->bios_head, drive->bios_sect);
731
732 /* write cache enabled? */
733 if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id))
734 drive->dev_flags |= IDE_DFLAG_WCACHE;
735
736 set_wcache(drive, 1);
737
738 if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 &&
739 (drive->head == 0 || drive->head > 16)) {
740 printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n",
741 drive->name, drive->head);
742 drive->dev_flags &= ~IDE_DFLAG_ATTACH;
743 } else
744 drive->dev_flags |= IDE_DFLAG_ATTACH;
745 }
746
747 static void ide_disk_flush(ide_drive_t *drive)
748 {
749 if (ata_id_flush_enabled(drive->id) == 0 ||
750 (drive->dev_flags & IDE_DFLAG_WCACHE) == 0)
751 return;
752
753 if (do_idedisk_flushcache(drive))
754 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
755 }
756
757 static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk)
758 {
759 return 0;
760 }
761
762 static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk,
763 int on)
764 {
765 struct ide_cmd cmd;
766 int ret;
767
768 if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0)
769 return 0;
770
771 memset(&cmd, 0, sizeof(cmd));
772 cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK;
773 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
774 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
775
776 ret = ide_no_data_taskfile(drive, &cmd);
777
778 if (ret)
779 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
780
781 return ret;
782 }
783
784 const struct ide_disk_ops ide_ata_disk_ops = {
785 .check = ide_disk_check,
786 .set_capacity = ide_disk_set_capacity,
787 .get_capacity = ide_disk_get_capacity,
788 .setup = ide_disk_setup,
789 .flush = ide_disk_flush,
790 .init_media = ide_disk_init_media,
791 .set_doorlock = ide_disk_set_doorlock,
792 .do_request = ide_do_rw_disk,
793 .ioctl = ide_disk_ioctl,
794 };
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree