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[linux-2.6.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         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
457         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
458         rq->special = cmd;
459         cmd->rq = rq;
460
461         return BLKPREP_OK;
462 }
463
464 ide_devset_get(multcount, mult_count);
465
466 /*
467  * This is tightly woven into the driver->do_special can not touch.
468  * DON'T do it again until a total personality rewrite is committed.
469  */
470 static int set_multcount(ide_drive_t *drive, int arg)
471 {
472         struct request *rq;
473         int error;
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, READ, __GFP_WAIT);
482         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
483
484         drive->mult_req = arg;
485         drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
486         error = blk_execute_rq(drive->queue, NULL, rq, 0);
487         blk_put_request(rq);
488
489         return (drive->mult_count == arg) ? 0 : -EIO;
490 }
491
492 ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR);
493
494 static 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
509 static 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
523 static void update_flush(ide_drive_t *drive)
524 {
525         u16 *id = drive->id;
526         unsigned flush = 0;
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                         flush = REQ_FLUSH;
551                         blk_queue_prep_rq(drive->queue, idedisk_prep_fn);
552                 }
553         }
554
555         blk_queue_flush(drive->queue, flush);
556 }
557
558 ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE);
559
560 static 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
583 static 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
598 ide_devset_get(acoustic, acoustic);
599
600 static 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
613 ide_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  */
621 static 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
641 ide_ext_devset_rw(acoustic, acoustic);
642 ide_ext_devset_rw(address, addressing);
643 ide_ext_devset_rw(multcount, multcount);
644 ide_ext_devset_rw(wcache, wcache);
645
646 ide_ext_devset_rw_sync(nowerr, nowerr);
647
648 static int ide_disk_check(ide_drive_t *drive, const char *s)
649 {
650         return 1;
651 }
652
653 static 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                 queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
691
692         /* calculate drive capacity, and select LBA if possible */
693         ide_disk_get_capacity(drive);
694
695         /*
696          * if possible, give fdisk access to more of the drive,
697          * by correcting bios_cyls:
698          */
699         capacity = ide_gd_capacity(drive);
700
701         if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) {
702                 if (ata_id_lba48_enabled(drive->id)) {
703                         /* compatibility */
704                         drive->bios_sect = 63;
705                         drive->bios_head = 255;
706                 }
707
708                 if (drive->bios_sect && drive->bios_head) {
709                         unsigned int cap0 = capacity; /* truncate to 32 bits */
710                         unsigned int cylsz, cyl;
711
712                         if (cap0 != capacity)
713                                 drive->bios_cyl = 65535;
714                         else {
715                                 cylsz = drive->bios_sect * drive->bios_head;
716                                 cyl = cap0 / cylsz;
717                                 if (cyl > 65535)
718                                         cyl = 65535;
719                                 if (cyl > drive->bios_cyl)
720                                         drive->bios_cyl = cyl;
721                         }
722                 }
723         }
724         printk(KERN_INFO "%s: %llu sectors (%llu MB)",
725                          drive->name, capacity, sectors_to_MB(capacity));
726
727         /* Only print cache size when it was specified */
728         if (id[ATA_ID_BUF_SIZE])
729                 printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2);
730
731         printk(KERN_CONT ", CHS=%d/%d/%d\n",
732                          drive->bios_cyl, drive->bios_head, drive->bios_sect);
733
734         /* write cache enabled? */
735         if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id))
736                 drive->dev_flags |= IDE_DFLAG_WCACHE;
737
738         set_wcache(drive, 1);
739
740         if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 &&
741             (drive->head == 0 || drive->head > 16)) {
742                 printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n",
743                         drive->name, drive->head);
744                 drive->dev_flags &= ~IDE_DFLAG_ATTACH;
745         } else
746                 drive->dev_flags |= IDE_DFLAG_ATTACH;
747 }
748
749 static void ide_disk_flush(ide_drive_t *drive)
750 {
751         if (ata_id_flush_enabled(drive->id) == 0 ||
752             (drive->dev_flags & IDE_DFLAG_WCACHE) == 0)
753                 return;
754
755         if (do_idedisk_flushcache(drive))
756                 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
757 }
758
759 static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk)
760 {
761         return 0;
762 }
763
764 static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk,
765                                  int on)
766 {
767         struct ide_cmd cmd;
768         int ret;
769
770         if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0)
771                 return 0;
772
773         memset(&cmd, 0, sizeof(cmd));
774         cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK;
775         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
776         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
777
778         ret = ide_no_data_taskfile(drive, &cmd);
779
780         if (ret)
781                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
782
783         return ret;
784 }
785
786 const struct ide_disk_ops ide_ata_disk_ops = {
787         .check                  = ide_disk_check,
788         .unlock_native_capacity = ide_disk_unlock_native_capacity,
789         .get_capacity           = ide_disk_get_capacity,
790         .setup                  = ide_disk_setup,
791         .flush                  = ide_disk_flush,
792         .init_media             = ide_disk_init_media,
793         .set_doorlock           = ide_disk_set_doorlock,
794         .do_request             = ide_do_rw_disk,
795         .ioctl                  = ide_disk_ioctl,
796 };