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1da177e4 1/*
59bca8cc
BZ
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>
ccd32e22 5 * Copyright (C) 2003 Red Hat
59bca8cc 6 * Copyright (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz
1da177e4
LT
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.
1da177e4
LT
15 */
16
1da177e4
LT
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>
cf8b8975 28#include <linux/mutex.h>
2bfb646c 29#include <linux/leds.h>
1da177e4
LT
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
f8790489 38#include "ide-disk.h"
1da177e4 39
ba76ae38 40static const u8 ide_rw_cmds[] = {
aaaade3f
BZ
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,
ba76ae38
BZ
53};
54
22aa4b32 55static void ide_tf_set_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 dma)
ba76ae38
BZ
56{
57 u8 index, lba48, write;
58
22aa4b32
BZ
59 lba48 = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 2 : 0;
60 write = (cmd->tf_flags & IDE_TFLAG_WRITE) ? 1 : 0;
ba76ae38 61
0dfb991c
BZ
62 if (dma) {
63 cmd->protocol = ATA_PROT_DMA;
ba4b2e60 64 index = 8;
0dfb991c
BZ
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 }
ba76ae38 73
22aa4b32 74 cmd->tf.command = ide_rw_cmds[index + lba48 + write];
ba76ae38
BZ
75}
76
1da177e4
LT
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 */
98416549
BZ
81static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
82 sector_t block)
1da177e4 83{
898ec223 84 ide_hwif_t *hwif = drive->hwif;
9780e2dd 85 u16 nsectors = (u16)blk_rq_sectors(rq);
97100fc8
BZ
86 u8 lba48 = !!(drive->dev_flags & IDE_DFLAG_LBA48);
87 u8 dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
22aa4b32
BZ
88 struct ide_cmd cmd;
89 struct ide_taskfile *tf = &cmd.tf;
f6e29e35 90 ide_startstop_t rc;
1da177e4 91
238e4f14 92 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) {
9780e2dd 93 if (block + blk_rq_sectors(rq) > 1ULL << 28)
1da177e4
LT
94 dma = 0;
95 else
96 lba48 = 0;
97 }
98
22aa4b32 99 memset(&cmd, 0, sizeof(cmd));
60f85019
SS
100 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
101 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
2bd06b23 102
d1d76714 103 if (drive->dev_flags & IDE_DFLAG_LBA) {
1da177e4 104 if (lba48) {
c2f8311d
MR
105 pr_debug("%s: LBA=0x%012llx\n", drive->name,
106 (unsigned long long)block);
1da177e4 107
790d1239 108 tf->nsect = nsectors & 0xff;
2bd06b23
BZ
109 tf->lbal = (u8) block;
110 tf->lbam = (u8)(block >> 8);
111 tf->lbah = (u8)(block >> 16);
745483f1
SS
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 }
6dd9b837 121
60f85019
SS
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;
1da177e4 125 } else {
790d1239 126 tf->nsect = nsectors & 0xff;
2bd06b23
BZ
127 tf->lbal = block;
128 tf->lbam = block >>= 8;
129 tf->lbah = block >>= 8;
745483f1 130 tf->device = ((block >> 8) & 0xf) | ATA_LBA;
1da177e4
LT
131 }
132 } else {
98416549
BZ
133 unsigned int sect, head, cyl, track;
134
1da177e4
LT
135 track = (int)block / drive->sect;
136 sect = (int)block % drive->sect + 1;
1da177e4
LT
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
790d1239 142 tf->nsect = nsectors & 0xff;
2bd06b23
BZ
143 tf->lbal = sect;
144 tf->lbam = cyl;
145 tf->lbah = cyl >> 8;
146 tf->device = head;
1da177e4
LT
147 }
148
adb1af98
BZ
149 cmd.tf_flags |= IDE_TFLAG_FS;
150
ba76ae38 151 if (rq_data_dir(rq))
22aa4b32 152 cmd.tf_flags |= IDE_TFLAG_WRITE;
ba76ae38 153
22aa4b32
BZ
154 ide_tf_set_cmd(drive, &cmd, dma);
155 cmd.rq = rq;
ba76ae38 156
22981694 157 if (dma == 0) {
bf717c0a 158 ide_init_sg_cmd(&cmd, nsectors << 9);
22981694
BZ
159 ide_map_sg(drive, &cmd);
160 }
161
22aa4b32 162 rc = do_rw_taskfile(drive, &cmd);
2bd06b23 163
f6e29e35 164 if (rc == ide_stopped && dma) {
1da177e4 165 /* fallback to PIO */
22aa4b32
BZ
166 cmd.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK;
167 ide_tf_set_cmd(drive, &cmd, 0);
bf717c0a 168 ide_init_sg_cmd(&cmd, nsectors << 9);
22aa4b32 169 rc = do_rw_taskfile(drive, &cmd);
1da177e4
LT
170 }
171
f6e29e35 172 return rc;
1da177e4
LT
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
806f80a6
BZ
181static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
182 sector_t block)
1da177e4 183{
898ec223 184 ide_hwif_t *hwif = drive->hwif;
1da177e4 185
97100fc8 186 BUG_ON(drive->dev_flags & IDE_DFLAG_BLOCKED);
2c7eaa43 187 BUG_ON(!blk_fs_request(rq));
1da177e4 188
2bfb646c
RP
189 ledtrig_ide_activity();
190
9780e2dd 191 pr_debug("%s: %sing: block=%llu, sectors=%u, buffer=0x%08lx\n",
1da177e4 192 drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
9780e2dd 193 (unsigned long long)block, blk_rq_sectors(rq),
c2f8311d 194 (unsigned long)rq->buffer);
1da177e4
LT
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 */
7a3b7512 206static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48)
1da177e4 207{
22aa4b32
BZ
208 struct ide_cmd cmd;
209 struct ide_taskfile *tf = &cmd.tf;
7a3b7512 210 u64 addr = 0;
1da177e4 211
22aa4b32 212 memset(&cmd, 0, sizeof(cmd));
7a3b7512 213 if (lba48)
aaaade3f 214 tf->command = ATA_CMD_READ_NATIVE_MAX_EXT;
7a3b7512 215 else
aaaade3f 216 tf->command = ATA_CMD_READ_NATIVE_MAX;
650d841d 217 tf->device = ATA_LBA;
22aa4b32 218
60f85019
SS
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 }
22aa4b32
BZ
226
227 ide_no_data_taskfile(drive, &cmd);
1da177e4 228
1da177e4 229 /* if OK, compute maximum address value */
47ab8348 230 if (!(tf->status & ATA_ERR))
745483f1 231 addr = ide_get_lba_addr(&cmd, lba48) + 1;
650d841d 232
1da177e4
LT
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 */
7a3b7512 240static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48)
1da177e4 241{
22aa4b32
BZ
242 struct ide_cmd cmd;
243 struct ide_taskfile *tf = &cmd.tf;
7a3b7512 244 u64 addr_set = 0;
1da177e4
LT
245
246 addr_req--;
22aa4b32
BZ
247
248 memset(&cmd, 0, sizeof(cmd));
650d841d
BZ
249 tf->lbal = (addr_req >> 0) & 0xff;
250 tf->lbam = (addr_req >>= 8) & 0xff;
251 tf->lbah = (addr_req >>= 8) & 0xff;
7a3b7512 252 if (lba48) {
745483f1
SS
253 cmd.hob.lbal = (addr_req >>= 8) & 0xff;
254 cmd.hob.lbam = (addr_req >>= 8) & 0xff;
255 cmd.hob.lbah = (addr_req >>= 8) & 0xff;
aaaade3f 256 tf->command = ATA_CMD_SET_MAX_EXT;
7a3b7512
BZ
257 } else {
258 tf->device = (addr_req >>= 8) & 0x0f;
aaaade3f 259 tf->command = ATA_CMD_SET_MAX;
7a3b7512
BZ
260 }
261 tf->device |= ATA_LBA;
22aa4b32 262
60f85019
SS
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 }
22aa4b32
BZ
270
271 ide_no_data_taskfile(drive, &cmd);
272
1da177e4 273 /* if OK, compute maximum address value */
47ab8348 274 if (!(tf->status & ATA_ERR))
745483f1 275 addr_set = ide_get_lba_addr(&cmd, lba48) + 1;
650d841d 276
1da177e4
LT
277 return addr_set;
278}
279
280static 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
b0244a00
BZ
287/*
288 * Some disks report total number of sectors instead of
289 * maximum sector address. We list them here.
290 */
291static const struct drive_list_entry hpa_list[] = {
292 { "ST340823A", NULL },
7062cdc5 293 { "ST320413A", NULL },
b152fcd3 294 { "ST310211A", NULL },
b0244a00
BZ
295 { NULL, NULL }
296};
297
e957b60d 298static u64 ide_disk_hpa_get_native_capacity(ide_drive_t *drive, int lba48)
1da177e4 299{
e957b60d 300 u64 capacity, set_max;
1da177e4
LT
301
302 capacity = drive->capacity64;
e957b60d 303 set_max = idedisk_read_native_max_address(drive, lba48);
1da177e4 304
b0244a00
BZ
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
e957b60d
BZ
314 return set_max;
315}
316
317static 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
326static 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
1da177e4
LT
334 if (set_max <= capacity)
335 return;
336
e957b60d
BZ
337 drive->probed_capacity = set_max;
338
1da177e4
LT
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
075affcb
BZ
346 if ((drive->dev_flags & IDE_DFLAG_NOHPA) == 0)
347 return;
7a3b7512 348
e957b60d
BZ
349 set_max = ide_disk_hpa_set_capacity(drive, set_max, lba48);
350 if (set_max)
1da177e4
LT
351 printk(KERN_INFO "%s: Host Protected Area disabled.\n",
352 drive->name);
1da177e4
LT
353}
354
806f80a6 355static int ide_disk_get_capacity(ide_drive_t *drive)
1da177e4 356{
4dde4492 357 u16 *id = drive->id;
d1d76714 358 int lba;
1da177e4 359
942dcd85 360 if (ata_id_lba48_enabled(id)) {
1da177e4 361 /* drive speaks 48-bit LBA */
d1d76714 362 lba = 1;
48fb2688 363 drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
a02227c9 364 } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) {
1da177e4 365 /* drive speaks 28-bit LBA */
d1d76714 366 lba = 1;
48fb2688 367 drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
1da177e4
LT
368 } else {
369 /* drive speaks boring old 28-bit CHS */
d1d76714 370 lba = 0;
1da177e4
LT
371 drive->capacity64 = drive->cyl * drive->head * drive->sect;
372 }
d1d76714 373
e957b60d
BZ
374 drive->probed_capacity = drive->capacity64;
375
d1d76714
BZ
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 }
0a70c7f6
BZ
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));
e957b60d 394 drive->probed_capacity = drive->capacity64 = 1ULL << 28;
0a70c7f6
BZ
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 }
806f80a6
BZ
406
407 return 0;
1da177e4
LT
408}
409
e957b60d
BZ
410static 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);
075affcb
BZ
429 if (set) {
430 /* needed for ->resume to disable HPA */
431 drive->dev_flags |= IDE_DFLAG_NOHPA;
e957b60d 432 return set;
075affcb 433 }
e957b60d
BZ
434out:
435 return drive->capacity64;
436}
437
165125e1 438static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
1da177e4
LT
439{
440 ide_drive_t *drive = q->queuedata;
22aa4b32 441 struct ide_cmd *cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);
1da177e4 442
395d8ef5 443 /* FIXME: map struct ide_taskfile on rq->cmd[] */
22aa4b32 444 BUG_ON(cmd == NULL);
395d8ef5 445
22aa4b32 446 memset(cmd, 0, sizeof(*cmd));
ff2779b5 447 if (ata_id_flush_ext_enabled(drive->id) &&
1da177e4 448 (drive->capacity64 >= (1UL << 28)))
22aa4b32 449 cmd->tf.command = ATA_CMD_FLUSH_EXT;
1da177e4 450 else
22aa4b32 451 cmd->tf.command = ATA_CMD_FLUSH;
60f85019
SS
452 cmd->valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
453 cmd->tf_flags = IDE_TFLAG_DYN;
0dfb991c 454 cmd->protocol = ATA_PROT_NODATA;
1da177e4 455
813a0eb2 456 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
22aa4b32 457 rq->special = cmd;
bc146d23 458 cmd->rq = rq;
1da177e4
LT
459}
460
8185d5aa
BZ
461ide_devset_get(multcount, mult_count);
462
1da177e4
LT
463/*
464 * This is tightly woven into the driver->do_special can not touch.
465 * DON'T do it again until a total personality rewrite is committed.
466 */
467static int set_multcount(ide_drive_t *drive, int arg)
468{
dd47087b
FT
469 struct request *rq;
470 int error;
1da177e4 471
48fb2688 472 if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff))
1497943e
BZ
473 return -EINVAL;
474
ca1b96e0 475 if (drive->special_flags & IDE_SFLAG_SET_MULTMODE)
1da177e4 476 return -EBUSY;
852738f3 477
dd47087b
FT
478 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
479 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
852738f3 480
1da177e4 481 drive->mult_req = arg;
ca1b96e0 482 drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
dd47087b
FT
483 error = blk_execute_rq(drive->queue, NULL, rq, 0);
484 blk_put_request(rq);
98416549 485
1da177e4
LT
486 return (drive->mult_count == arg) ? 0 : -EIO;
487}
488
97100fc8 489ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR);
8185d5aa 490
1da177e4
LT
491static int set_nowerr(ide_drive_t *drive, int arg)
492{
1497943e
BZ
493 if (arg < 0 || arg > 1)
494 return -EINVAL;
495
97100fc8
BZ
496 if (arg)
497 drive->dev_flags |= IDE_DFLAG_NOWERR;
498 else
499 drive->dev_flags &= ~IDE_DFLAG_NOWERR;
500
1da177e4 501 drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
97100fc8 502
1da177e4
LT
503 return 0;
504}
505
be3c096e
BZ
506static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect)
507{
22aa4b32 508 struct ide_cmd cmd;
be3c096e 509
22aa4b32
BZ
510 memset(&cmd, 0, sizeof(cmd));
511 cmd.tf.feature = feature;
512 cmd.tf.nsect = nsect;
513 cmd.tf.command = ATA_CMD_SET_FEATURES;
60f85019
SS
514 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
515 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
be3c096e 516
22aa4b32 517 return ide_no_data_taskfile(drive, &cmd);
be3c096e
BZ
518}
519
3e087b57
TH
520static void update_ordered(ide_drive_t *drive)
521{
4dde4492 522 u16 *id = drive->id;
3e087b57
TH
523 unsigned ordered = QUEUE_ORDERED_NONE;
524 prepare_flush_fn *prep_fn = NULL;
3e087b57 525
97100fc8 526 if (drive->dev_flags & IDE_DFLAG_WCACHE) {
3e087b57
TH
527 unsigned long long capacity;
528 int barrier;
529 /*
530 * We must avoid issuing commands a drive does not
531 * understand or we may crash it. We check flush cache
532 * is supported. We also check we have the LBA48 flush
533 * cache if the drive capacity is too large. By this
534 * time we have trimmed the drive capacity if LBA48 is
535 * not available so we don't need to recheck that.
536 */
5fef0e5c 537 capacity = ide_gd_capacity(drive);
97100fc8
BZ
538 barrier = ata_id_flush_enabled(id) &&
539 (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 &&
540 ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 ||
541 capacity <= (1ULL << 28) ||
ff2779b5 542 ata_id_flush_ext_enabled(id));
3e087b57
TH
543
544 printk(KERN_INFO "%s: cache flushes %ssupported\n",
f7ad836c 545 drive->name, barrier ? "" : "not ");
3e087b57
TH
546
547 if (barrier) {
548 ordered = QUEUE_ORDERED_DRAIN_FLUSH;
549 prep_fn = idedisk_prepare_flush;
3e087b57
TH
550 }
551 } else
552 ordered = QUEUE_ORDERED_DRAIN;
553
554 blk_queue_ordered(drive->queue, ordered, prep_fn);
3e087b57
TH
555}
556
97100fc8 557ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE);
8185d5aa
BZ
558
559static int set_wcache(ide_drive_t *drive, int arg)
1da177e4 560{
3e087b57 561 int err = 1;
1da177e4 562
1497943e
BZ
563 if (arg < 0 || arg > 1)
564 return -EINVAL;
565
4b58f17d 566 if (ata_id_flush_enabled(drive->id)) {
be3c096e
BZ
567 err = ide_do_setfeature(drive,
568 arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0);
97100fc8
BZ
569 if (err == 0) {
570 if (arg)
571 drive->dev_flags |= IDE_DFLAG_WCACHE;
572 else
573 drive->dev_flags &= ~IDE_DFLAG_WCACHE;
574 }
3e087b57 575 }
1da177e4 576
3e087b57 577 update_ordered(drive);
1da177e4 578
3e087b57 579 return err;
1da177e4
LT
580}
581
98416549 582static int do_idedisk_flushcache(ide_drive_t *drive)
1da177e4 583{
22aa4b32 584 struct ide_cmd cmd;
1da177e4 585
22aa4b32 586 memset(&cmd, 0, sizeof(cmd));
ff2779b5 587 if (ata_id_flush_ext_enabled(drive->id))
22aa4b32 588 cmd.tf.command = ATA_CMD_FLUSH_EXT;
1da177e4 589 else
22aa4b32 590 cmd.tf.command = ATA_CMD_FLUSH;
60f85019
SS
591 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
592 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
22aa4b32
BZ
593
594 return ide_no_data_taskfile(drive, &cmd);
1da177e4
LT
595}
596
8185d5aa
BZ
597ide_devset_get(acoustic, acoustic);
598
98416549 599static int set_acoustic(ide_drive_t *drive, int arg)
1da177e4 600{
1497943e
BZ
601 if (arg < 0 || arg > 254)
602 return -EINVAL;
603
be3c096e
BZ
604 ide_do_setfeature(drive,
605 arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg);
606
1da177e4 607 drive->acoustic = arg;
be3c096e 608
1da177e4
LT
609 return 0;
610}
611
97100fc8 612ide_devset_get_flag(addressing, IDE_DFLAG_LBA48);
8185d5aa 613
1da177e4
LT
614/*
615 * drive->addressing:
616 * 0: 28-bit
617 * 1: 48-bit
618 * 2: 48-bit capable doing 28-bit
619 */
aa768773 620static int set_addressing(ide_drive_t *drive, int arg)
1da177e4 621{
1497943e
BZ
622 if (arg < 0 || arg > 2)
623 return -EINVAL;
624
35c13753
BZ
625 if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
626 ata_id_lba48_enabled(drive->id) == 0))
98416549 627 return -EIO;
942dcd85 628
35c13753
BZ
629 if (arg == 2)
630 arg = 0;
631
97100fc8
BZ
632 if (arg)
633 drive->dev_flags |= IDE_DFLAG_LBA48;
634 else
635 drive->dev_flags &= ~IDE_DFLAG_LBA48;
942dcd85 636
1da177e4
LT
637 return 0;
638}
639
f8790489
BZ
640ide_ext_devset_rw(acoustic, acoustic);
641ide_ext_devset_rw(address, addressing);
642ide_ext_devset_rw(multcount, multcount);
643ide_ext_devset_rw(wcache, wcache);
92f1f8fd 644
f8790489 645ide_ext_devset_rw_sync(nowerr, nowerr);
92f1f8fd 646
806f80a6
BZ
647static int ide_disk_check(ide_drive_t *drive, const char *s)
648{
649 return 1;
650}
651
652static void ide_disk_setup(ide_drive_t *drive)
1da177e4 653{
1e874f44 654 struct ide_disk_obj *idkp = drive->driver_data;
c77380d4 655 struct request_queue *q = drive->queue;
238e4f14 656 ide_hwif_t *hwif = drive->hwif;
4dde4492
BZ
657 u16 *id = drive->id;
658 char *m = (char *)&id[ATA_ID_PROD];
1da177e4 659 unsigned long long capacity;
1da177e4 660
1e874f44 661 ide_proc_register_driver(drive, idkp->driver);
1da177e4 662
97100fc8 663 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0)
1da177e4
LT
664 return;
665
97100fc8 666 if (drive->dev_flags & IDE_DFLAG_REMOVABLE) {
1da177e4 667 /*
98416549 668 * Removable disks (eg. SYQUEST); ignore 'WD' drives
1da177e4 669 */
4dde4492 670 if (m[0] != 'W' || m[1] != 'D')
97100fc8 671 drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
1da177e4
LT
672 }
673
aa768773 674 (void)set_addressing(drive, 1);
1da177e4 675
97100fc8 676 if (drive->dev_flags & IDE_DFLAG_LBA48) {
1da177e4
LT
677 int max_s = 2048;
678
679 if (max_s > hwif->rqsize)
680 max_s = hwif->rqsize;
681
c77380d4 682 blk_queue_max_sectors(q, max_s);
1da177e4
LT
683 }
684
98416549 685 printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name,
3b77f777 686 queue_max_sectors(q) / 2);
c77380d4 687
655772cc 688 if (ata_id_is_ssd(id))
c77380d4 689 queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
1da177e4
LT
690
691 /* calculate drive capacity, and select LBA if possible */
806f80a6 692 ide_disk_get_capacity(drive);
1da177e4 693
1da177e4
LT
694 /*
695 * if possible, give fdisk access to more of the drive,
696 * by correcting bios_cyls:
697 */
5fef0e5c 698 capacity = ide_gd_capacity(drive);
98416549 699
97100fc8 700 if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) {
942dcd85 701 if (ata_id_lba48_enabled(drive->id)) {
1da177e4
LT
702 /* compatibility */
703 drive->bios_sect = 63;
704 drive->bios_head = 255;
705 }
706
707 if (drive->bios_sect && drive->bios_head) {
708 unsigned int cap0 = capacity; /* truncate to 32 bits */
709 unsigned int cylsz, cyl;
710
711 if (cap0 != capacity)
712 drive->bios_cyl = 65535;
713 else {
714 cylsz = drive->bios_sect * drive->bios_head;
715 cyl = cap0 / cylsz;
716 if (cyl > 65535)
717 cyl = 65535;
718 if (cyl > drive->bios_cyl)
719 drive->bios_cyl = cyl;
720 }
721 }
722 }
723 printk(KERN_INFO "%s: %llu sectors (%llu MB)",
724 drive->name, capacity, sectors_to_MB(capacity));
725
726 /* Only print cache size when it was specified */
4dde4492
BZ
727 if (id[ATA_ID_BUF_SIZE])
728 printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2);
1da177e4 729
3ab7efe8
BZ
730 printk(KERN_CONT ", CHS=%d/%d/%d\n",
731 drive->bios_cyl, drive->bios_head, drive->bios_sect);
1da177e4 732
1da177e4 733 /* write cache enabled? */
8a089c66 734 if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id))
97100fc8 735 drive->dev_flags |= IDE_DFLAG_WCACHE;
1da177e4 736
8185d5aa 737 set_wcache(drive, 1);
ae9f9f07
BZ
738
739 if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 &&
740 (drive->head == 0 || drive->head > 16)) {
741 printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n",
742 drive->name, drive->head);
743 drive->dev_flags &= ~IDE_DFLAG_ATTACH;
744 } else
745 drive->dev_flags |= IDE_DFLAG_ATTACH;
1da177e4
LT
746}
747
806f80a6 748static void ide_disk_flush(ide_drive_t *drive)
1da177e4 749{
97100fc8
BZ
750 if (ata_id_flush_enabled(drive->id) == 0 ||
751 (drive->dev_flags & IDE_DFLAG_WCACHE) == 0)
1da177e4
LT
752 return;
753
754 if (do_idedisk_flushcache(drive))
755 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
756}
757
806f80a6
BZ
758static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk)
759{
760 return 0;
761}
762
763static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk,
764 int on)
29ec683f 765{
22aa4b32 766 struct ide_cmd cmd;
81ee1bb5
BZ
767 int ret;
768
769 if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0)
770 return 0;
29ec683f 771
22aa4b32
BZ
772 memset(&cmd, 0, sizeof(cmd));
773 cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK;
60f85019
SS
774 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
775 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
29ec683f 776
22aa4b32 777 ret = ide_no_data_taskfile(drive, &cmd);
81ee1bb5
BZ
778
779 if (ret)
780 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
781
782 return ret;
29ec683f 783}
806f80a6
BZ
784
785const struct ide_disk_ops ide_ata_disk_ops = {
786 .check = ide_disk_check,
e957b60d 787 .set_capacity = ide_disk_set_capacity,
806f80a6
BZ
788 .get_capacity = ide_disk_get_capacity,
789 .setup = ide_disk_setup,
790 .flush = ide_disk_flush,
791 .init_media = ide_disk_init_media,
792 .set_doorlock = ide_disk_set_doorlock,
793 .do_request = ide_do_rw_disk,
806f80a6
BZ
794 .ioctl = ide_disk_ioctl,
795};