Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
[linux-3.10.git] / drivers / ide / ide-disk.c
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, 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 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
430 static 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 (!(rq->cmd_flags & REQ_FLUSH))
436                 return BLKPREP_OK;
437
438         cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);
439
440         /* FIXME: map struct ide_taskfile on rq->cmd[] */
441         BUG_ON(cmd == NULL);
442
443         if (ata_id_flush_ext_enabled(drive->id) &&
444             (drive->capacity64 >= (1UL << 28)))
445                 cmd->tf.command = ATA_CMD_FLUSH_EXT;
446         else
447                 cmd->tf.command = ATA_CMD_FLUSH;
448         cmd->valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
449         cmd->tf_flags = IDE_TFLAG_DYN;
450         cmd->protocol = ATA_PROT_NODATA;
451
452         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
453         rq->special = cmd;
454         cmd->rq = rq;
455
456         return BLKPREP_OK;
457 }
458
459 ide_devset_get(multcount, mult_count);
460
461 /*
462  * This is tightly woven into the driver->do_special can not touch.
463  * DON'T do it again until a total personality rewrite is committed.
464  */
465 static int set_multcount(ide_drive_t *drive, int arg)
466 {
467         struct request *rq;
468         int error;
469
470         if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff))
471                 return -EINVAL;
472
473         if (drive->special_flags & IDE_SFLAG_SET_MULTMODE)
474                 return -EBUSY;
475
476         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
477         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
478
479         drive->mult_req = arg;
480         drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
481         error = blk_execute_rq(drive->queue, NULL, rq, 0);
482         blk_put_request(rq);
483
484         return (drive->mult_count == arg) ? 0 : -EIO;
485 }
486
487 ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR);
488
489 static int set_nowerr(ide_drive_t *drive, int arg)
490 {
491         if (arg < 0 || arg > 1)
492                 return -EINVAL;
493
494         if (arg)
495                 drive->dev_flags |= IDE_DFLAG_NOWERR;
496         else
497                 drive->dev_flags &= ~IDE_DFLAG_NOWERR;
498
499         drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
500
501         return 0;
502 }
503
504 static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect)
505 {
506         struct ide_cmd cmd;
507
508         memset(&cmd, 0, sizeof(cmd));
509         cmd.tf.feature = feature;
510         cmd.tf.nsect   = nsect;
511         cmd.tf.command = ATA_CMD_SET_FEATURES;
512         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
513         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
514
515         return ide_no_data_taskfile(drive, &cmd);
516 }
517
518 static void update_flush(ide_drive_t *drive)
519 {
520         u16 *id = drive->id;
521         unsigned flush = 0;
522
523         if (drive->dev_flags & IDE_DFLAG_WCACHE) {
524                 unsigned long long capacity;
525                 int barrier;
526                 /*
527                  * We must avoid issuing commands a drive does not
528                  * understand or we may crash it. We check flush cache
529                  * is supported. We also check we have the LBA48 flush
530                  * cache if the drive capacity is too large. By this
531                  * time we have trimmed the drive capacity if LBA48 is
532                  * not available so we don't need to recheck that.
533                  */
534                 capacity = ide_gd_capacity(drive);
535                 barrier = ata_id_flush_enabled(id) &&
536                         (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 &&
537                         ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 ||
538                          capacity <= (1ULL << 28) ||
539                          ata_id_flush_ext_enabled(id));
540
541                 printk(KERN_INFO "%s: cache flushes %ssupported\n",
542                        drive->name, barrier ? "" : "not ");
543
544                 if (barrier) {
545                         flush = REQ_FLUSH;
546                         blk_queue_prep_rq(drive->queue, idedisk_prep_fn);
547                 }
548         }
549
550         blk_queue_flush(drive->queue, flush);
551 }
552
553 ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE);
554
555 static int set_wcache(ide_drive_t *drive, int arg)
556 {
557         int err = 1;
558
559         if (arg < 0 || arg > 1)
560                 return -EINVAL;
561
562         if (ata_id_flush_enabled(drive->id)) {
563                 err = ide_do_setfeature(drive,
564                         arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0);
565                 if (err == 0) {
566                         if (arg)
567                                 drive->dev_flags |= IDE_DFLAG_WCACHE;
568                         else
569                                 drive->dev_flags &= ~IDE_DFLAG_WCACHE;
570                 }
571         }
572
573         update_flush(drive);
574
575         return err;
576 }
577
578 static int do_idedisk_flushcache(ide_drive_t *drive)
579 {
580         struct ide_cmd cmd;
581
582         memset(&cmd, 0, sizeof(cmd));
583         if (ata_id_flush_ext_enabled(drive->id))
584                 cmd.tf.command = ATA_CMD_FLUSH_EXT;
585         else
586                 cmd.tf.command = ATA_CMD_FLUSH;
587         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
588         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
589
590         return ide_no_data_taskfile(drive, &cmd);
591 }
592
593 ide_devset_get(acoustic, acoustic);
594
595 static int set_acoustic(ide_drive_t *drive, int arg)
596 {
597         if (arg < 0 || arg > 254)
598                 return -EINVAL;
599
600         ide_do_setfeature(drive,
601                 arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg);
602
603         drive->acoustic = arg;
604
605         return 0;
606 }
607
608 ide_devset_get_flag(addressing, IDE_DFLAG_LBA48);
609
610 /*
611  * drive->addressing:
612  *      0: 28-bit
613  *      1: 48-bit
614  *      2: 48-bit capable doing 28-bit
615  */
616 static int set_addressing(ide_drive_t *drive, int arg)
617 {
618         if (arg < 0 || arg > 2)
619                 return -EINVAL;
620
621         if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
622             ata_id_lba48_enabled(drive->id) == 0))
623                 return -EIO;
624
625         if (arg == 2)
626                 arg = 0;
627
628         if (arg)
629                 drive->dev_flags |= IDE_DFLAG_LBA48;
630         else
631                 drive->dev_flags &= ~IDE_DFLAG_LBA48;
632
633         return 0;
634 }
635
636 ide_ext_devset_rw(acoustic, acoustic);
637 ide_ext_devset_rw(address, addressing);
638 ide_ext_devset_rw(multcount, multcount);
639 ide_ext_devset_rw(wcache, wcache);
640
641 ide_ext_devset_rw_sync(nowerr, nowerr);
642
643 static int ide_disk_check(ide_drive_t *drive, const char *s)
644 {
645         return 1;
646 }
647
648 static void ide_disk_setup(ide_drive_t *drive)
649 {
650         struct ide_disk_obj *idkp = drive->driver_data;
651         struct request_queue *q = drive->queue;
652         ide_hwif_t *hwif = drive->hwif;
653         u16 *id = drive->id;
654         char *m = (char *)&id[ATA_ID_PROD];
655         unsigned long long capacity;
656
657         ide_proc_register_driver(drive, idkp->driver);
658
659         if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0)
660                 return;
661
662         if (drive->dev_flags & IDE_DFLAG_REMOVABLE) {
663                 /*
664                  * Removable disks (eg. SYQUEST); ignore 'WD' drives
665                  */
666                 if (m[0] != 'W' || m[1] != 'D')
667                         drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
668         }
669
670         (void)set_addressing(drive, 1);
671
672         if (drive->dev_flags & IDE_DFLAG_LBA48) {
673                 int max_s = 2048;
674
675                 if (max_s > hwif->rqsize)
676                         max_s = hwif->rqsize;
677
678                 blk_queue_max_hw_sectors(q, max_s);
679         }
680
681         printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name,
682                queue_max_sectors(q) / 2);
683
684         if (ata_id_is_ssd(id))
685                 queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
686
687         /* calculate drive capacity, and select LBA if possible */
688         ide_disk_get_capacity(drive);
689
690         /*
691          * if possible, give fdisk access to more of the drive,
692          * by correcting bios_cyls:
693          */
694         capacity = ide_gd_capacity(drive);
695
696         if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) {
697                 if (ata_id_lba48_enabled(drive->id)) {
698                         /* compatibility */
699                         drive->bios_sect = 63;
700                         drive->bios_head = 255;
701                 }
702
703                 if (drive->bios_sect && drive->bios_head) {
704                         unsigned int cap0 = capacity; /* truncate to 32 bits */
705                         unsigned int cylsz, cyl;
706
707                         if (cap0 != capacity)
708                                 drive->bios_cyl = 65535;
709                         else {
710                                 cylsz = drive->bios_sect * drive->bios_head;
711                                 cyl = cap0 / cylsz;
712                                 if (cyl > 65535)
713                                         cyl = 65535;
714                                 if (cyl > drive->bios_cyl)
715                                         drive->bios_cyl = cyl;
716                         }
717                 }
718         }
719         printk(KERN_INFO "%s: %llu sectors (%llu MB)",
720                          drive->name, capacity, sectors_to_MB(capacity));
721
722         /* Only print cache size when it was specified */
723         if (id[ATA_ID_BUF_SIZE])
724                 printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2);
725
726         printk(KERN_CONT ", CHS=%d/%d/%d\n",
727                          drive->bios_cyl, drive->bios_head, drive->bios_sect);
728
729         /* write cache enabled? */
730         if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id))
731                 drive->dev_flags |= IDE_DFLAG_WCACHE;
732
733         set_wcache(drive, 1);
734
735         if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 &&
736             (drive->head == 0 || drive->head > 16)) {
737                 printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n",
738                         drive->name, drive->head);
739                 drive->dev_flags &= ~IDE_DFLAG_ATTACH;
740         } else
741                 drive->dev_flags |= IDE_DFLAG_ATTACH;
742 }
743
744 static void ide_disk_flush(ide_drive_t *drive)
745 {
746         if (ata_id_flush_enabled(drive->id) == 0 ||
747             (drive->dev_flags & IDE_DFLAG_WCACHE) == 0)
748                 return;
749
750         if (do_idedisk_flushcache(drive))
751                 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
752 }
753
754 static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk)
755 {
756         return 0;
757 }
758
759 static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk,
760                                  int on)
761 {
762         struct ide_cmd cmd;
763         int ret;
764
765         if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0)
766                 return 0;
767
768         memset(&cmd, 0, sizeof(cmd));
769         cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK;
770         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
771         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
772
773         ret = ide_no_data_taskfile(drive, &cmd);
774
775         if (ret)
776                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
777
778         return ret;
779 }
780
781 const struct ide_disk_ops ide_ata_disk_ops = {
782         .check                  = ide_disk_check,
783         .unlock_native_capacity = ide_disk_unlock_native_capacity,
784         .get_capacity           = ide_disk_get_capacity,
785         .setup                  = ide_disk_setup,
786         .flush                  = ide_disk_flush,
787         .init_media             = ide_disk_init_media,
788         .set_doorlock           = ide_disk_set_doorlock,
789         .do_request             = ide_do_rw_disk,
790         .ioctl                  = ide_disk_ioctl,
791 };