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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(rq->cmd_type != REQ_TYPE_FS); | |
188 | ||
189 | ledtrig_ide_activity(); | |
190 | ||
191 | pr_debug("%s: %sing: block=%llu, sectors=%u\n", | |
192 | drive->name, rq_data_dir(rq) == READ ? "read" : "writ", | |
193 | (unsigned long long)block, blk_rq_sectors(rq)); | |
194 | ||
195 | if (hwif->rw_disk) | |
196 | hwif->rw_disk(drive, rq); | |
197 | ||
198 | return __ide_do_rw_disk(drive, rq, block); | |
199 | } | |
200 | ||
201 | /* | |
202 | * Queries for true maximum capacity of the drive. | |
203 | * Returns maximum LBA address (> 0) of the drive, 0 if failed. | |
204 | */ | |
205 | static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48) | |
206 | { | |
207 | struct ide_cmd cmd; | |
208 | struct ide_taskfile *tf = &cmd.tf; | |
209 | u64 addr = 0; | |
210 | ||
211 | memset(&cmd, 0, sizeof(cmd)); | |
212 | if (lba48) | |
213 | tf->command = ATA_CMD_READ_NATIVE_MAX_EXT; | |
214 | else | |
215 | tf->command = ATA_CMD_READ_NATIVE_MAX; | |
216 | tf->device = ATA_LBA; | |
217 | ||
218 | cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; | |
219 | cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; | |
220 | if (lba48) { | |
221 | cmd.valid.out.hob = IDE_VALID_OUT_HOB; | |
222 | cmd.valid.in.hob = IDE_VALID_IN_HOB; | |
223 | cmd.tf_flags = IDE_TFLAG_LBA48; | |
224 | } | |
225 | ||
226 | ide_no_data_taskfile(drive, &cmd); | |
227 | ||
228 | /* if OK, compute maximum address value */ | |
229 | if (!(tf->status & ATA_ERR)) | |
230 | addr = ide_get_lba_addr(&cmd, lba48) + 1; | |
231 | ||
232 | return addr; | |
233 | } | |
234 | ||
235 | /* | |
236 | * Sets maximum virtual LBA address of the drive. | |
237 | * Returns new maximum virtual LBA address (> 0) or 0 on failure. | |
238 | */ | |
239 | static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48) | |
240 | { | |
241 | struct ide_cmd cmd; | |
242 | struct ide_taskfile *tf = &cmd.tf; | |
243 | u64 addr_set = 0; | |
244 | ||
245 | addr_req--; | |
246 | ||
247 | memset(&cmd, 0, sizeof(cmd)); | |
248 | tf->lbal = (addr_req >> 0) & 0xff; | |
249 | tf->lbam = (addr_req >>= 8) & 0xff; | |
250 | tf->lbah = (addr_req >>= 8) & 0xff; | |
251 | if (lba48) { | |
252 | cmd.hob.lbal = (addr_req >>= 8) & 0xff; | |
253 | cmd.hob.lbam = (addr_req >>= 8) & 0xff; | |
254 | cmd.hob.lbah = (addr_req >>= 8) & 0xff; | |
255 | tf->command = ATA_CMD_SET_MAX_EXT; | |
256 | } else { | |
257 | tf->device = (addr_req >>= 8) & 0x0f; | |
258 | tf->command = ATA_CMD_SET_MAX; | |
259 | } | |
260 | tf->device |= ATA_LBA; | |
261 | ||
262 | cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; | |
263 | cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; | |
264 | if (lba48) { | |
265 | cmd.valid.out.hob = IDE_VALID_OUT_HOB; | |
266 | cmd.valid.in.hob = IDE_VALID_IN_HOB; | |
267 | cmd.tf_flags = IDE_TFLAG_LBA48; | |
268 | } | |
269 | ||
270 | ide_no_data_taskfile(drive, &cmd); | |
271 | ||
272 | /* if OK, compute maximum address value */ | |
273 | if (!(tf->status & ATA_ERR)) | |
274 | addr_set = ide_get_lba_addr(&cmd, lba48) + 1; | |
275 | ||
276 | return addr_set; | |
277 | } | |
278 | ||
279 | static unsigned long long sectors_to_MB(unsigned long long n) | |
280 | { | |
281 | n <<= 9; /* make it bytes */ | |
282 | do_div(n, 1000000); /* make it MB */ | |
283 | return n; | |
284 | } | |
285 | ||
286 | /* | |
287 | * Some disks report total number of sectors instead of | |
288 | * maximum sector address. We list them here. | |
289 | */ | |
290 | static const struct drive_list_entry hpa_list[] = { | |
291 | { "ST340823A", NULL }, | |
292 | { "ST320413A", NULL }, | |
293 | { "ST310211A", NULL }, | |
294 | { NULL, NULL } | |
295 | }; | |
296 | ||
297 | static u64 ide_disk_hpa_get_native_capacity(ide_drive_t *drive, int lba48) | |
298 | { | |
299 | u64 capacity, set_max; | |
300 | ||
301 | capacity = drive->capacity64; | |
302 | set_max = idedisk_read_native_max_address(drive, lba48); | |
303 | ||
304 | if (ide_in_drive_list(drive->id, hpa_list)) { | |
305 | /* | |
306 | * Since we are inclusive wrt to firmware revisions do this | |
307 | * extra check and apply the workaround only when needed. | |
308 | */ | |
309 | if (set_max == capacity + 1) | |
310 | set_max--; | |
311 | } | |
312 | ||
313 | return set_max; | |
314 | } | |
315 | ||
316 | static u64 ide_disk_hpa_set_capacity(ide_drive_t *drive, u64 set_max, int lba48) | |
317 | { | |
318 | set_max = idedisk_set_max_address(drive, set_max, lba48); | |
319 | if (set_max) | |
320 | drive->capacity64 = set_max; | |
321 | ||
322 | return set_max; | |
323 | } | |
324 | ||
325 | static void idedisk_check_hpa(ide_drive_t *drive) | |
326 | { | |
327 | u64 capacity, set_max; | |
328 | int lba48 = ata_id_lba48_enabled(drive->id); | |
329 | ||
330 | capacity = drive->capacity64; | |
331 | set_max = ide_disk_hpa_get_native_capacity(drive, lba48); | |
332 | ||
333 | if (set_max <= capacity) | |
334 | return; | |
335 | ||
336 | drive->probed_capacity = set_max; | |
337 | ||
338 | printk(KERN_INFO "%s: Host Protected Area detected.\n" | |
339 | "\tcurrent capacity is %llu sectors (%llu MB)\n" | |
340 | "\tnative capacity is %llu sectors (%llu MB)\n", | |
341 | drive->name, | |
342 | capacity, sectors_to_MB(capacity), | |
343 | set_max, sectors_to_MB(set_max)); | |
344 | ||
345 | if ((drive->dev_flags & IDE_DFLAG_NOHPA) == 0) | |
346 | return; | |
347 | ||
348 | set_max = ide_disk_hpa_set_capacity(drive, set_max, lba48); | |
349 | if (set_max) | |
350 | printk(KERN_INFO "%s: Host Protected Area disabled.\n", | |
351 | drive->name); | |
352 | } | |
353 | ||
354 | static int ide_disk_get_capacity(ide_drive_t *drive) | |
355 | { | |
356 | u16 *id = drive->id; | |
357 | int lba; | |
358 | ||
359 | if (ata_id_lba48_enabled(id)) { | |
360 | /* drive speaks 48-bit LBA */ | |
361 | lba = 1; | |
362 | drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2); | |
363 | } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) { | |
364 | /* drive speaks 28-bit LBA */ | |
365 | lba = 1; | |
366 | drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY); | |
367 | } else { | |
368 | /* drive speaks boring old 28-bit CHS */ | |
369 | lba = 0; | |
370 | drive->capacity64 = drive->cyl * drive->head * drive->sect; | |
371 | } | |
372 | ||
373 | drive->probed_capacity = drive->capacity64; | |
374 | ||
375 | if (lba) { | |
376 | drive->dev_flags |= IDE_DFLAG_LBA; | |
377 | ||
378 | /* | |
379 | * If this device supports the Host Protected Area feature set, | |
380 | * then we may need to change our opinion about its capacity. | |
381 | */ | |
382 | if (ata_id_hpa_enabled(id)) | |
383 | idedisk_check_hpa(drive); | |
384 | } | |
385 | ||
386 | /* limit drive capacity to 137GB if LBA48 cannot be used */ | |
387 | if ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 && | |
388 | drive->capacity64 > 1ULL << 28) { | |
389 | printk(KERN_WARNING "%s: cannot use LBA48 - full capacity " | |
390 | "%llu sectors (%llu MB)\n", | |
391 | drive->name, (unsigned long long)drive->capacity64, | |
392 | sectors_to_MB(drive->capacity64)); | |
393 | drive->probed_capacity = drive->capacity64 = 1ULL << 28; | |
394 | } | |
395 | ||
396 | if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && | |
397 | (drive->dev_flags & IDE_DFLAG_LBA48)) { | |
398 | if (drive->capacity64 > 1ULL << 28) { | |
399 | printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode" | |
400 | " will be used for accessing sectors " | |
401 | "> %u\n", drive->name, 1 << 28); | |
402 | } else | |
403 | drive->dev_flags &= ~IDE_DFLAG_LBA48; | |
404 | } | |
405 | ||
406 | return 0; | |
407 | } | |
408 | ||
409 | static void ide_disk_unlock_native_capacity(ide_drive_t *drive) | |
410 | { | |
411 | u16 *id = drive->id; | |
412 | int lba48 = ata_id_lba48_enabled(id); | |
413 | ||
414 | if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 || | |
415 | ata_id_hpa_enabled(id) == 0) | |
416 | return; | |
417 | ||
418 | /* | |
419 | * according to the spec the SET MAX ADDRESS command shall be | |
420 | * immediately preceded by a READ NATIVE MAX ADDRESS command | |
421 | */ | |
422 | if (!ide_disk_hpa_get_native_capacity(drive, lba48)) | |
423 | return; | |
424 | ||
425 | if (ide_disk_hpa_set_capacity(drive, drive->probed_capacity, lba48)) | |
426 | drive->dev_flags |= IDE_DFLAG_NOHPA; /* disable HPA on resume */ | |
427 | } | |
428 | ||
429 | static int idedisk_prep_fn(struct request_queue *q, struct request *rq) | |
430 | { | |
431 | ide_drive_t *drive = q->queuedata; | |
432 | struct ide_cmd *cmd; | |
433 | ||
434 | if (!(rq->cmd_flags & REQ_FLUSH)) | |
435 | return BLKPREP_OK; | |
436 | ||
437 | if (rq->special) { | |
438 | cmd = rq->special; | |
439 | memset(cmd, 0, sizeof(*cmd)); | |
440 | } else { | |
441 | cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC); | |
442 | } | |
443 | ||
444 | /* FIXME: map struct ide_taskfile on rq->cmd[] */ | |
445 | BUG_ON(cmd == NULL); | |
446 | ||
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 | cmd->rq = rq; | |
459 | ||
460 | return BLKPREP_OK; | |
461 | } | |
462 | ||
463 | ide_devset_get(multcount, mult_count); | |
464 | ||
465 | /* | |
466 | * This is tightly woven into the driver->do_special can not touch. | |
467 | * DON'T do it again until a total personality rewrite is committed. | |
468 | */ | |
469 | static int set_multcount(ide_drive_t *drive, int arg) | |
470 | { | |
471 | struct request *rq; | |
472 | int error; | |
473 | ||
474 | if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff)) | |
475 | return -EINVAL; | |
476 | ||
477 | if (drive->special_flags & IDE_SFLAG_SET_MULTMODE) | |
478 | return -EBUSY; | |
479 | ||
480 | rq = blk_get_request(drive->queue, READ, __GFP_RECLAIM); | |
481 | rq->cmd_type = REQ_TYPE_ATA_TASKFILE; | |
482 | ||
483 | drive->mult_req = arg; | |
484 | drive->special_flags |= IDE_SFLAG_SET_MULTMODE; | |
485 | error = blk_execute_rq(drive->queue, NULL, rq, 0); | |
486 | blk_put_request(rq); | |
487 | ||
488 | return (drive->mult_count == arg) ? 0 : -EIO; | |
489 | } | |
490 | ||
491 | ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR); | |
492 | ||
493 | static int set_nowerr(ide_drive_t *drive, int arg) | |
494 | { | |
495 | if (arg < 0 || arg > 1) | |
496 | return -EINVAL; | |
497 | ||
498 | if (arg) | |
499 | drive->dev_flags |= IDE_DFLAG_NOWERR; | |
500 | else | |
501 | drive->dev_flags &= ~IDE_DFLAG_NOWERR; | |
502 | ||
503 | drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT; | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
508 | static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect) | |
509 | { | |
510 | struct ide_cmd cmd; | |
511 | ||
512 | memset(&cmd, 0, sizeof(cmd)); | |
513 | cmd.tf.feature = feature; | |
514 | cmd.tf.nsect = nsect; | |
515 | cmd.tf.command = ATA_CMD_SET_FEATURES; | |
516 | cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; | |
517 | cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; | |
518 | ||
519 | return ide_no_data_taskfile(drive, &cmd); | |
520 | } | |
521 | ||
522 | static void update_flush(ide_drive_t *drive) | |
523 | { | |
524 | u16 *id = drive->id; | |
525 | unsigned flush = 0; | |
526 | ||
527 | if (drive->dev_flags & IDE_DFLAG_WCACHE) { | |
528 | unsigned long long capacity; | |
529 | int barrier; | |
530 | /* | |
531 | * We must avoid issuing commands a drive does not | |
532 | * understand or we may crash it. We check flush cache | |
533 | * is supported. We also check we have the LBA48 flush | |
534 | * cache if the drive capacity is too large. By this | |
535 | * time we have trimmed the drive capacity if LBA48 is | |
536 | * not available so we don't need to recheck that. | |
537 | */ | |
538 | capacity = ide_gd_capacity(drive); | |
539 | barrier = ata_id_flush_enabled(id) && | |
540 | (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 && | |
541 | ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 || | |
542 | capacity <= (1ULL << 28) || | |
543 | ata_id_flush_ext_enabled(id)); | |
544 | ||
545 | printk(KERN_INFO "%s: cache flushes %ssupported\n", | |
546 | drive->name, barrier ? "" : "not "); | |
547 | ||
548 | if (barrier) { | |
549 | flush = REQ_FLUSH; | |
550 | blk_queue_prep_rq(drive->queue, idedisk_prep_fn); | |
551 | } | |
552 | } | |
553 | ||
554 | blk_queue_flush(drive->queue, flush); | |
555 | } | |
556 | ||
557 | ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE); | |
558 | ||
559 | static int set_wcache(ide_drive_t *drive, int arg) | |
560 | { | |
561 | int err = 1; | |
562 | ||
563 | if (arg < 0 || arg > 1) | |
564 | return -EINVAL; | |
565 | ||
566 | if (ata_id_flush_enabled(drive->id)) { | |
567 | err = ide_do_setfeature(drive, | |
568 | arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0); | |
569 | if (err == 0) { | |
570 | if (arg) | |
571 | drive->dev_flags |= IDE_DFLAG_WCACHE; | |
572 | else | |
573 | drive->dev_flags &= ~IDE_DFLAG_WCACHE; | |
574 | } | |
575 | } | |
576 | ||
577 | update_flush(drive); | |
578 | ||
579 | return err; | |
580 | } | |
581 | ||
582 | static int do_idedisk_flushcache(ide_drive_t *drive) | |
583 | { | |
584 | struct ide_cmd cmd; | |
585 | ||
586 | memset(&cmd, 0, sizeof(cmd)); | |
587 | if (ata_id_flush_ext_enabled(drive->id)) | |
588 | cmd.tf.command = ATA_CMD_FLUSH_EXT; | |
589 | else | |
590 | cmd.tf.command = ATA_CMD_FLUSH; | |
591 | cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; | |
592 | cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; | |
593 | ||
594 | return ide_no_data_taskfile(drive, &cmd); | |
595 | } | |
596 | ||
597 | ide_devset_get(acoustic, acoustic); | |
598 | ||
599 | static int set_acoustic(ide_drive_t *drive, int arg) | |
600 | { | |
601 | if (arg < 0 || arg > 254) | |
602 | return -EINVAL; | |
603 | ||
604 | ide_do_setfeature(drive, | |
605 | arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg); | |
606 | ||
607 | drive->acoustic = arg; | |
608 | ||
609 | return 0; | |
610 | } | |
611 | ||
612 | ide_devset_get_flag(addressing, IDE_DFLAG_LBA48); | |
613 | ||
614 | /* | |
615 | * drive->addressing: | |
616 | * 0: 28-bit | |
617 | * 1: 48-bit | |
618 | * 2: 48-bit capable doing 28-bit | |
619 | */ | |
620 | static int set_addressing(ide_drive_t *drive, int arg) | |
621 | { | |
622 | if (arg < 0 || arg > 2) | |
623 | return -EINVAL; | |
624 | ||
625 | if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) || | |
626 | ata_id_lba48_enabled(drive->id) == 0)) | |
627 | return -EIO; | |
628 | ||
629 | if (arg == 2) | |
630 | arg = 0; | |
631 | ||
632 | if (arg) | |
633 | drive->dev_flags |= IDE_DFLAG_LBA48; | |
634 | else | |
635 | drive->dev_flags &= ~IDE_DFLAG_LBA48; | |
636 | ||
637 | return 0; | |
638 | } | |
639 | ||
640 | ide_ext_devset_rw(acoustic, acoustic); | |
641 | ide_ext_devset_rw(address, addressing); | |
642 | ide_ext_devset_rw(multcount, multcount); | |
643 | ide_ext_devset_rw(wcache, wcache); | |
644 | ||
645 | ide_ext_devset_rw_sync(nowerr, nowerr); | |
646 | ||
647 | static int ide_disk_check(ide_drive_t *drive, const char *s) | |
648 | { | |
649 | return 1; | |
650 | } | |
651 | ||
652 | static void ide_disk_setup(ide_drive_t *drive) | |
653 | { | |
654 | struct ide_disk_obj *idkp = drive->driver_data; | |
655 | struct request_queue *q = drive->queue; | |
656 | ide_hwif_t *hwif = drive->hwif; | |
657 | u16 *id = drive->id; | |
658 | char *m = (char *)&id[ATA_ID_PROD]; | |
659 | unsigned long long capacity; | |
660 | ||
661 | ide_proc_register_driver(drive, idkp->driver); | |
662 | ||
663 | if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) | |
664 | return; | |
665 | ||
666 | if (drive->dev_flags & IDE_DFLAG_REMOVABLE) { | |
667 | /* | |
668 | * Removable disks (eg. SYQUEST); ignore 'WD' drives | |
669 | */ | |
670 | if (m[0] != 'W' || m[1] != 'D') | |
671 | drive->dev_flags |= IDE_DFLAG_DOORLOCKING; | |
672 | } | |
673 | ||
674 | (void)set_addressing(drive, 1); | |
675 | ||
676 | if (drive->dev_flags & IDE_DFLAG_LBA48) { | |
677 | int max_s = 2048; | |
678 | ||
679 | if (max_s > hwif->rqsize) | |
680 | max_s = hwif->rqsize; | |
681 | ||
682 | blk_queue_max_hw_sectors(q, max_s); | |
683 | } | |
684 | ||
685 | printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, | |
686 | queue_max_sectors(q) / 2); | |
687 | ||
688 | if (ata_id_is_ssd(id)) { | |
689 | queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q); | |
690 | queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, q); | |
691 | } | |
692 | ||
693 | /* calculate drive capacity, and select LBA if possible */ | |
694 | ide_disk_get_capacity(drive); | |
695 | ||
696 | /* | |
697 | * if possible, give fdisk access to more of the drive, | |
698 | * by correcting bios_cyls: | |
699 | */ | |
700 | capacity = ide_gd_capacity(drive); | |
701 | ||
702 | if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) { | |
703 | if (ata_id_lba48_enabled(drive->id)) { | |
704 | /* compatibility */ | |
705 | drive->bios_sect = 63; | |
706 | drive->bios_head = 255; | |
707 | } | |
708 | ||
709 | if (drive->bios_sect && drive->bios_head) { | |
710 | unsigned int cap0 = capacity; /* truncate to 32 bits */ | |
711 | unsigned int cylsz, cyl; | |
712 | ||
713 | if (cap0 != capacity) | |
714 | drive->bios_cyl = 65535; | |
715 | else { | |
716 | cylsz = drive->bios_sect * drive->bios_head; | |
717 | cyl = cap0 / cylsz; | |
718 | if (cyl > 65535) | |
719 | cyl = 65535; | |
720 | if (cyl > drive->bios_cyl) | |
721 | drive->bios_cyl = cyl; | |
722 | } | |
723 | } | |
724 | } | |
725 | printk(KERN_INFO "%s: %llu sectors (%llu MB)", | |
726 | drive->name, capacity, sectors_to_MB(capacity)); | |
727 | ||
728 | /* Only print cache size when it was specified */ | |
729 | if (id[ATA_ID_BUF_SIZE]) | |
730 | printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2); | |
731 | ||
732 | printk(KERN_CONT ", CHS=%d/%d/%d\n", | |
733 | drive->bios_cyl, drive->bios_head, drive->bios_sect); | |
734 | ||
735 | /* write cache enabled? */ | |
736 | if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id)) | |
737 | drive->dev_flags |= IDE_DFLAG_WCACHE; | |
738 | ||
739 | set_wcache(drive, 1); | |
740 | ||
741 | if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 && | |
742 | (drive->head == 0 || drive->head > 16)) { | |
743 | printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n", | |
744 | drive->name, drive->head); | |
745 | drive->dev_flags &= ~IDE_DFLAG_ATTACH; | |
746 | } else | |
747 | drive->dev_flags |= IDE_DFLAG_ATTACH; | |
748 | } | |
749 | ||
750 | static void ide_disk_flush(ide_drive_t *drive) | |
751 | { | |
752 | if (ata_id_flush_enabled(drive->id) == 0 || | |
753 | (drive->dev_flags & IDE_DFLAG_WCACHE) == 0) | |
754 | return; | |
755 | ||
756 | if (do_idedisk_flushcache(drive)) | |
757 | printk(KERN_INFO "%s: wcache flush failed!\n", drive->name); | |
758 | } | |
759 | ||
760 | static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk) | |
761 | { | |
762 | return 0; | |
763 | } | |
764 | ||
765 | static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk, | |
766 | int on) | |
767 | { | |
768 | struct ide_cmd cmd; | |
769 | int ret; | |
770 | ||
771 | if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) | |
772 | return 0; | |
773 | ||
774 | memset(&cmd, 0, sizeof(cmd)); | |
775 | cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK; | |
776 | cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; | |
777 | cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; | |
778 | ||
779 | ret = ide_no_data_taskfile(drive, &cmd); | |
780 | ||
781 | if (ret) | |
782 | drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; | |
783 | ||
784 | return ret; | |
785 | } | |
786 | ||
787 | const struct ide_disk_ops ide_ata_disk_ops = { | |
788 | .check = ide_disk_check, | |
789 | .unlock_native_capacity = ide_disk_unlock_native_capacity, | |
790 | .get_capacity = ide_disk_get_capacity, | |
791 | .setup = ide_disk_setup, | |
792 | .flush = ide_disk_flush, | |
793 | .init_media = ide_disk_init_media, | |
794 | .set_doorlock = ide_disk_set_doorlock, | |
795 | .do_request = ide_do_rw_disk, | |
796 | .ioctl = ide_disk_ioctl, | |
797 | }; |