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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
4 * Copyright (C) 1998-2002 Linux ATA Development
5 * Andre Hedrick <andre@linux-ide.org>
6 * Copyright (C) 2003 Red Hat
7 * Copyright (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz
8 */
9
10/*
11 * Mostly written by Mark Lord <mlord@pobox.com>
12 * and Gadi Oxman <gadio@netvision.net.il>
13 * and Andre Hedrick <andre@linux-ide.org>
14 *
15 * This is the IDE/ATA disk driver, as evolved from hd.c and ide.c.
16 */
17
18#include <linux/types.h>
19#include <linux/string.h>
20#include <linux/kernel.h>
21#include <linux/timer.h>
22#include <linux/mm.h>
23#include <linux/interrupt.h>
24#include <linux/major.h>
25#include <linux/errno.h>
26#include <linux/genhd.h>
27#include <linux/slab.h>
28#include <linux/delay.h>
29#include <linux/mutex.h>
30#include <linux/leds.h>
31#include <linux/ide.h>
32
33#include <asm/byteorder.h>
34#include <asm/irq.h>
35#include <linux/uaccess.h>
36#include <asm/io.h>
37#include <asm/div64.h>
38
39#include "ide-disk.h"
40
41static const u8 ide_rw_cmds[] = {
42 ATA_CMD_READ_MULTI,
43 ATA_CMD_WRITE_MULTI,
44 ATA_CMD_READ_MULTI_EXT,
45 ATA_CMD_WRITE_MULTI_EXT,
46 ATA_CMD_PIO_READ,
47 ATA_CMD_PIO_WRITE,
48 ATA_CMD_PIO_READ_EXT,
49 ATA_CMD_PIO_WRITE_EXT,
50 ATA_CMD_READ,
51 ATA_CMD_WRITE,
52 ATA_CMD_READ_EXT,
53 ATA_CMD_WRITE_EXT,
54};
55
56static void ide_tf_set_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 dma)
57{
58 u8 index, lba48, write;
59
60 lba48 = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 2 : 0;
61 write = (cmd->tf_flags & IDE_TFLAG_WRITE) ? 1 : 0;
62
63 if (dma) {
64 cmd->protocol = ATA_PROT_DMA;
65 index = 8;
66 } else {
67 cmd->protocol = ATA_PROT_PIO;
68 if (drive->mult_count) {
69 cmd->tf_flags |= IDE_TFLAG_MULTI_PIO;
70 index = 0;
71 } else
72 index = 4;
73 }
74
75 cmd->tf.command = ide_rw_cmds[index + lba48 + write];
76}
77
78/*
79 * __ide_do_rw_disk() issues READ and WRITE commands to a disk,
80 * using LBA if supported, or CHS otherwise, to address sectors.
81 */
82static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
83 sector_t block)
84{
85 ide_hwif_t *hwif = drive->hwif;
86 u16 nsectors = (u16)blk_rq_sectors(rq);
87 u8 lba48 = !!(drive->dev_flags & IDE_DFLAG_LBA48);
88 u8 dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
89 struct ide_cmd cmd;
90 struct ide_taskfile *tf = &cmd.tf;
91 ide_startstop_t rc;
92
93 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) {
94 if (block + blk_rq_sectors(rq) > 1ULL << 28)
95 dma = 0;
96 else
97 lba48 = 0;
98 }
99
100 memset(&cmd, 0, sizeof(cmd));
101 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
102 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
103
104 if (drive->dev_flags & IDE_DFLAG_LBA) {
105 if (lba48) {
106 pr_debug("%s: LBA=0x%012llx\n", drive->name,
107 (unsigned long long)block);
108
109 tf->nsect = nsectors & 0xff;
110 tf->lbal = (u8) block;
111 tf->lbam = (u8)(block >> 8);
112 tf->lbah = (u8)(block >> 16);
113 tf->device = ATA_LBA;
114
115 tf = &cmd.hob;
116 tf->nsect = (nsectors >> 8) & 0xff;
117 tf->lbal = (u8)(block >> 24);
118 if (sizeof(block) != 4) {
119 tf->lbam = (u8)((u64)block >> 32);
120 tf->lbah = (u8)((u64)block >> 40);
121 }
122
123 cmd.valid.out.hob = IDE_VALID_OUT_HOB;
124 cmd.valid.in.hob = IDE_VALID_IN_HOB;
125 cmd.tf_flags |= IDE_TFLAG_LBA48;
126 } else {
127 tf->nsect = nsectors & 0xff;
128 tf->lbal = block;
129 tf->lbam = block >>= 8;
130 tf->lbah = block >>= 8;
131 tf->device = ((block >> 8) & 0xf) | ATA_LBA;
132 }
133 } else {
134 unsigned int sect, head, cyl, track;
135
136 track = (int)block / drive->sect;
137 sect = (int)block % drive->sect + 1;
138 head = track % drive->head;
139 cyl = track / drive->head;
140
141 pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect);
142
143 tf->nsect = nsectors & 0xff;
144 tf->lbal = sect;
145 tf->lbam = cyl;
146 tf->lbah = cyl >> 8;
147 tf->device = head;
148 }
149
150 cmd.tf_flags |= IDE_TFLAG_FS;
151
152 if (rq_data_dir(rq))
153 cmd.tf_flags |= IDE_TFLAG_WRITE;
154
155 ide_tf_set_cmd(drive, &cmd, dma);
156 cmd.rq = rq;
157
158 if (dma == 0) {
159 ide_init_sg_cmd(&cmd, nsectors << 9);
160 ide_map_sg(drive, &cmd);
161 }
162
163 rc = do_rw_taskfile(drive, &cmd);
164
165 if (rc == ide_stopped && dma) {
166 /* fallback to PIO */
167 cmd.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK;
168 ide_tf_set_cmd(drive, &cmd, 0);
169 ide_init_sg_cmd(&cmd, nsectors << 9);
170 rc = do_rw_taskfile(drive, &cmd);
171 }
172
173 return rc;
174}
175
176/*
177 * 268435455 == 137439 MB or 28bit limit
178 * 320173056 == 163929 MB or 48bit addressing
179 * 1073741822 == 549756 MB or 48bit addressing fake drive
180 */
181
182static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
183 sector_t block)
184{
185 ide_hwif_t *hwif = drive->hwif;
186
187 BUG_ON(drive->dev_flags & IDE_DFLAG_BLOCKED);
188 BUG_ON(blk_rq_is_passthrough(rq));
189
190 ledtrig_disk_activity(rq_data_dir(rq) == WRITE);
191
192 pr_debug("%s: %sing: block=%llu, sectors=%u\n",
193 drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
194 (unsigned long long)block, blk_rq_sectors(rq));
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 */
206static 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 */
240static 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
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
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 },
293 { "ST320413A", NULL },
294 { "ST310211A", NULL },
295 { NULL, NULL }
296};
297
298static 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
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
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
355static 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
410static void ide_disk_unlock_native_capacity(ide_drive_t *drive)
411{
412 u16 *id = drive->id;
413 int lba48 = ata_id_lba48_enabled(id);
414
415 if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 ||
416 ata_id_hpa_enabled(id) == 0)
417 return;
418
419 /*
420 * according to the spec the SET MAX ADDRESS command shall be
421 * immediately preceded by a READ NATIVE MAX ADDRESS command
422 */
423 if (!ide_disk_hpa_get_native_capacity(drive, lba48))
424 return;
425
426 if (ide_disk_hpa_set_capacity(drive, drive->probed_capacity, lba48))
427 drive->dev_flags |= IDE_DFLAG_NOHPA; /* disable HPA on resume */
428}
429
430static int idedisk_prep_fn(struct request_queue *q, struct request *rq)
431{
432 ide_drive_t *drive = q->queuedata;
433 struct ide_cmd *cmd;
434
435 if (req_op(rq) != REQ_OP_FLUSH)
436 return BLKPREP_OK;
437
438 if (rq->special) {
439 cmd = rq->special;
440 memset(cmd, 0, sizeof(*cmd));
441 } else {
442 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);
443 }
444
445 /* FIXME: map struct ide_taskfile on rq->cmd[] */
446 BUG_ON(cmd == NULL);
447
448 if (ata_id_flush_ext_enabled(drive->id) &&
449 (drive->capacity64 >= (1UL << 28)))
450 cmd->tf.command = ATA_CMD_FLUSH_EXT;
451 else
452 cmd->tf.command = ATA_CMD_FLUSH;
453 cmd->valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
454 cmd->tf_flags = IDE_TFLAG_DYN;
455 cmd->protocol = ATA_PROT_NODATA;
456 rq->cmd_flags &= ~REQ_OP_MASK;
457 rq->cmd_flags |= REQ_OP_DRV_OUT;
458 ide_req(rq)->type = ATA_PRIV_TASKFILE;
459 rq->special = cmd;
460 cmd->rq = rq;
461
462 return BLKPREP_OK;
463}
464
465ide_devset_get(multcount, mult_count);
466
467/*
468 * This is tightly woven into the driver->do_special can not touch.
469 * DON'T do it again until a total personality rewrite is committed.
470 */
471static int set_multcount(ide_drive_t *drive, int arg)
472{
473 struct request *rq;
474
475 if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff))
476 return -EINVAL;
477
478 if (drive->special_flags & IDE_SFLAG_SET_MULTMODE)
479 return -EBUSY;
480
481 rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
482 ide_req(rq)->type = ATA_PRIV_TASKFILE;
483
484 drive->mult_req = arg;
485 drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
486 blk_execute_rq(drive->queue, NULL, rq, 0);
487 blk_put_request(rq);
488
489 return (drive->mult_count == arg) ? 0 : -EIO;
490}
491
492ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR);
493
494static int set_nowerr(ide_drive_t *drive, int arg)
495{
496 if (arg < 0 || arg > 1)
497 return -EINVAL;
498
499 if (arg)
500 drive->dev_flags |= IDE_DFLAG_NOWERR;
501 else
502 drive->dev_flags &= ~IDE_DFLAG_NOWERR;
503
504 drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
505
506 return 0;
507}
508
509static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect)
510{
511 struct ide_cmd cmd;
512
513 memset(&cmd, 0, sizeof(cmd));
514 cmd.tf.feature = feature;
515 cmd.tf.nsect = nsect;
516 cmd.tf.command = ATA_CMD_SET_FEATURES;
517 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
518 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
519
520 return ide_no_data_taskfile(drive, &cmd);
521}
522
523static void update_flush(ide_drive_t *drive)
524{
525 u16 *id = drive->id;
526 bool wc = false;
527
528 if (drive->dev_flags & IDE_DFLAG_WCACHE) {
529 unsigned long long capacity;
530 int barrier;
531 /*
532 * We must avoid issuing commands a drive does not
533 * understand or we may crash it. We check flush cache
534 * is supported. We also check we have the LBA48 flush
535 * cache if the drive capacity is too large. By this
536 * time we have trimmed the drive capacity if LBA48 is
537 * not available so we don't need to recheck that.
538 */
539 capacity = ide_gd_capacity(drive);
540 barrier = ata_id_flush_enabled(id) &&
541 (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 &&
542 ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 ||
543 capacity <= (1ULL << 28) ||
544 ata_id_flush_ext_enabled(id));
545
546 printk(KERN_INFO "%s: cache flushes %ssupported\n",
547 drive->name, barrier ? "" : "not ");
548
549 if (barrier) {
550 wc = true;
551 blk_queue_prep_rq(drive->queue, idedisk_prep_fn);
552 }
553 }
554
555 blk_queue_write_cache(drive->queue, wc, false);
556}
557
558ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE);
559
560static int set_wcache(ide_drive_t *drive, int arg)
561{
562 int err = 1;
563
564 if (arg < 0 || arg > 1)
565 return -EINVAL;
566
567 if (ata_id_flush_enabled(drive->id)) {
568 err = ide_do_setfeature(drive,
569 arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0);
570 if (err == 0) {
571 if (arg)
572 drive->dev_flags |= IDE_DFLAG_WCACHE;
573 else
574 drive->dev_flags &= ~IDE_DFLAG_WCACHE;
575 }
576 }
577
578 update_flush(drive);
579
580 return err;
581}
582
583static int do_idedisk_flushcache(ide_drive_t *drive)
584{
585 struct ide_cmd cmd;
586
587 memset(&cmd, 0, sizeof(cmd));
588 if (ata_id_flush_ext_enabled(drive->id))
589 cmd.tf.command = ATA_CMD_FLUSH_EXT;
590 else
591 cmd.tf.command = ATA_CMD_FLUSH;
592 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
593 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
594
595 return ide_no_data_taskfile(drive, &cmd);
596}
597
598ide_devset_get(acoustic, acoustic);
599
600static int set_acoustic(ide_drive_t *drive, int arg)
601{
602 if (arg < 0 || arg > 254)
603 return -EINVAL;
604
605 ide_do_setfeature(drive,
606 arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg);
607
608 drive->acoustic = arg;
609
610 return 0;
611}
612
613ide_devset_get_flag(addressing, IDE_DFLAG_LBA48);
614
615/*
616 * drive->addressing:
617 * 0: 28-bit
618 * 1: 48-bit
619 * 2: 48-bit capable doing 28-bit
620 */
621static int set_addressing(ide_drive_t *drive, int arg)
622{
623 if (arg < 0 || arg > 2)
624 return -EINVAL;
625
626 if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
627 ata_id_lba48_enabled(drive->id) == 0))
628 return -EIO;
629
630 if (arg == 2)
631 arg = 0;
632
633 if (arg)
634 drive->dev_flags |= IDE_DFLAG_LBA48;
635 else
636 drive->dev_flags &= ~IDE_DFLAG_LBA48;
637
638 return 0;
639}
640
641ide_ext_devset_rw(acoustic, acoustic);
642ide_ext_devset_rw(address, addressing);
643ide_ext_devset_rw(multcount, multcount);
644ide_ext_devset_rw(wcache, wcache);
645
646ide_ext_devset_rw_sync(nowerr, nowerr);
647
648static int ide_disk_check(ide_drive_t *drive, const char *s)
649{
650 return 1;
651}
652
653static void ide_disk_setup(ide_drive_t *drive)
654{
655 struct ide_disk_obj *idkp = drive->driver_data;
656 struct request_queue *q = drive->queue;
657 ide_hwif_t *hwif = drive->hwif;
658 u16 *id = drive->id;
659 char *m = (char *)&id[ATA_ID_PROD];
660 unsigned long long capacity;
661
662 ide_proc_register_driver(drive, idkp->driver);
663
664 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0)
665 return;
666
667 if (drive->dev_flags & IDE_DFLAG_REMOVABLE) {
668 /*
669 * Removable disks (eg. SYQUEST); ignore 'WD' drives
670 */
671 if (m[0] != 'W' || m[1] != 'D')
672 drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
673 }
674
675 (void)set_addressing(drive, 1);
676
677 if (drive->dev_flags & IDE_DFLAG_LBA48) {
678 int max_s = 2048;
679
680 if (max_s > hwif->rqsize)
681 max_s = hwif->rqsize;
682
683 blk_queue_max_hw_sectors(q, max_s);
684 }
685
686 printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name,
687 queue_max_sectors(q) / 2);
688
689 if (ata_id_is_ssd(id)) {
690 blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
691 blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q);
692 }
693
694 /* calculate drive capacity, and select LBA if possible */
695 ide_disk_get_capacity(drive);
696
697 /*
698 * if possible, give fdisk access to more of the drive,
699 * by correcting bios_cyls:
700 */
701 capacity = ide_gd_capacity(drive);
702
703 if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) {
704 if (ata_id_lba48_enabled(drive->id)) {
705 /* compatibility */
706 drive->bios_sect = 63;
707 drive->bios_head = 255;
708 }
709
710 if (drive->bios_sect && drive->bios_head) {
711 unsigned int cap0 = capacity; /* truncate to 32 bits */
712 unsigned int cylsz, cyl;
713
714 if (cap0 != capacity)
715 drive->bios_cyl = 65535;
716 else {
717 cylsz = drive->bios_sect * drive->bios_head;
718 cyl = cap0 / cylsz;
719 if (cyl > 65535)
720 cyl = 65535;
721 if (cyl > drive->bios_cyl)
722 drive->bios_cyl = cyl;
723 }
724 }
725 }
726 printk(KERN_INFO "%s: %llu sectors (%llu MB)",
727 drive->name, capacity, sectors_to_MB(capacity));
728
729 /* Only print cache size when it was specified */
730 if (id[ATA_ID_BUF_SIZE])
731 printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2);
732
733 printk(KERN_CONT ", CHS=%d/%d/%d\n",
734 drive->bios_cyl, drive->bios_head, drive->bios_sect);
735
736 /* write cache enabled? */
737 if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id))
738 drive->dev_flags |= IDE_DFLAG_WCACHE;
739
740 set_wcache(drive, 1);
741
742 if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 &&
743 (drive->head == 0 || drive->head > 16)) {
744 printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n",
745 drive->name, drive->head);
746 drive->dev_flags &= ~IDE_DFLAG_ATTACH;
747 } else
748 drive->dev_flags |= IDE_DFLAG_ATTACH;
749}
750
751static void ide_disk_flush(ide_drive_t *drive)
752{
753 if (ata_id_flush_enabled(drive->id) == 0 ||
754 (drive->dev_flags & IDE_DFLAG_WCACHE) == 0)
755 return;
756
757 if (do_idedisk_flushcache(drive))
758 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
759}
760
761static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk)
762{
763 return 0;
764}
765
766static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk,
767 int on)
768{
769 struct ide_cmd cmd;
770 int ret;
771
772 if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0)
773 return 0;
774
775 memset(&cmd, 0, sizeof(cmd));
776 cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK;
777 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
778 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
779
780 ret = ide_no_data_taskfile(drive, &cmd);
781
782 if (ret)
783 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
784
785 return ret;
786}
787
788const struct ide_disk_ops ide_ata_disk_ops = {
789 .check = ide_disk_check,
790 .unlock_native_capacity = ide_disk_unlock_native_capacity,
791 .get_capacity = ide_disk_get_capacity,
792 .setup = ide_disk_setup,
793 .flush = ide_disk_flush,
794 .init_media = ide_disk_init_media,
795 .set_doorlock = ide_disk_set_doorlock,
796 .do_request = ide_do_rw_disk,
797 .ioctl = ide_disk_ioctl,
798};