ide: stop using q->prepare_flush_fn
[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         cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);
439
440         /* FIXME: map struct ide_taskfile on rq->cmd[] */
441         BUG_ON(cmd == NULL);
442
443         memset(cmd, 0, sizeof(*cmd));
444         if (ata_id_flush_ext_enabled(drive->id) &&
445             (drive->capacity64 >= (1UL << 28)))
446                 cmd->tf.command = ATA_CMD_FLUSH_EXT;
447         else
448                 cmd->tf.command = ATA_CMD_FLUSH;
449         cmd->valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
450         cmd->tf_flags = IDE_TFLAG_DYN;
451         cmd->protocol = ATA_PROT_NODATA;
452
453         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
454         rq->special = cmd;
455         cmd->rq = rq;
456
457         return BLKPREP_OK;
458 }
459
460 ide_devset_get(multcount, mult_count);
461
462 /*
463  * This is tightly woven into the driver->do_special can not touch.
464  * DON'T do it again until a total personality rewrite is committed.
465  */
466 static int set_multcount(ide_drive_t *drive, int arg)
467 {
468         struct request *rq;
469         int error;
470
471         if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff))
472                 return -EINVAL;
473
474         if (drive->special_flags & IDE_SFLAG_SET_MULTMODE)
475                 return -EBUSY;
476
477         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
478         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
479
480         drive->mult_req = arg;
481         drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
482         error = blk_execute_rq(drive->queue, NULL, rq, 0);
483         blk_put_request(rq);
484
485         return (drive->mult_count == arg) ? 0 : -EIO;
486 }
487
488 ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR);
489
490 static int set_nowerr(ide_drive_t *drive, int arg)
491 {
492         if (arg < 0 || arg > 1)
493                 return -EINVAL;
494
495         if (arg)
496                 drive->dev_flags |= IDE_DFLAG_NOWERR;
497         else
498                 drive->dev_flags &= ~IDE_DFLAG_NOWERR;
499
500         drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
501
502         return 0;
503 }
504
505 static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect)
506 {
507         struct ide_cmd cmd;
508
509         memset(&cmd, 0, sizeof(cmd));
510         cmd.tf.feature = feature;
511         cmd.tf.nsect   = nsect;
512         cmd.tf.command = ATA_CMD_SET_FEATURES;
513         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
514         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
515
516         return ide_no_data_taskfile(drive, &cmd);
517 }
518
519 static void update_ordered(ide_drive_t *drive)
520 {
521         u16 *id = drive->id;
522         unsigned ordered = QUEUE_ORDERED_NONE;
523
524         if (drive->dev_flags & IDE_DFLAG_WCACHE) {
525                 unsigned long long capacity;
526                 int barrier;
527                 /*
528                  * We must avoid issuing commands a drive does not
529                  * understand or we may crash it. We check flush cache
530                  * is supported. We also check we have the LBA48 flush
531                  * cache if the drive capacity is too large. By this
532                  * time we have trimmed the drive capacity if LBA48 is
533                  * not available so we don't need to recheck that.
534                  */
535                 capacity = ide_gd_capacity(drive);
536                 barrier = ata_id_flush_enabled(id) &&
537                         (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 &&
538                         ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 ||
539                          capacity <= (1ULL << 28) ||
540                          ata_id_flush_ext_enabled(id));
541
542                 printk(KERN_INFO "%s: cache flushes %ssupported\n",
543                        drive->name, barrier ? "" : "not ");
544
545                 if (barrier) {
546                         ordered = QUEUE_ORDERED_DRAIN_FLUSH;
547                         blk_queue_prep_rq(drive->queue, idedisk_prep_fn);
548                 }
549         } else
550                 ordered = QUEUE_ORDERED_DRAIN;
551
552         blk_queue_ordered(drive->queue, ordered, NULL);
553 }
554
555 ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE);
556
557 static int set_wcache(ide_drive_t *drive, int arg)
558 {
559         int err = 1;
560
561         if (arg < 0 || arg > 1)
562                 return -EINVAL;
563
564         if (ata_id_flush_enabled(drive->id)) {
565                 err = ide_do_setfeature(drive,
566                         arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0);
567                 if (err == 0) {
568                         if (arg)
569                                 drive->dev_flags |= IDE_DFLAG_WCACHE;
570                         else
571                                 drive->dev_flags &= ~IDE_DFLAG_WCACHE;
572                 }
573         }
574
575         update_ordered(drive);
576
577         return err;
578 }
579
580 static int do_idedisk_flushcache(ide_drive_t *drive)
581 {
582         struct ide_cmd cmd;
583
584         memset(&cmd, 0, sizeof(cmd));
585         if (ata_id_flush_ext_enabled(drive->id))
586                 cmd.tf.command = ATA_CMD_FLUSH_EXT;
587         else
588                 cmd.tf.command = ATA_CMD_FLUSH;
589         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
590         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
591
592         return ide_no_data_taskfile(drive, &cmd);
593 }
594
595 ide_devset_get(acoustic, acoustic);
596
597 static int set_acoustic(ide_drive_t *drive, int arg)
598 {
599         if (arg < 0 || arg > 254)
600                 return -EINVAL;
601
602         ide_do_setfeature(drive,
603                 arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg);
604
605         drive->acoustic = arg;
606
607         return 0;
608 }
609
610 ide_devset_get_flag(addressing, IDE_DFLAG_LBA48);
611
612 /*
613  * drive->addressing:
614  *      0: 28-bit
615  *      1: 48-bit
616  *      2: 48-bit capable doing 28-bit
617  */
618 static int set_addressing(ide_drive_t *drive, int arg)
619 {
620         if (arg < 0 || arg > 2)
621                 return -EINVAL;
622
623         if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
624             ata_id_lba48_enabled(drive->id) == 0))
625                 return -EIO;
626
627         if (arg == 2)
628                 arg = 0;
629
630         if (arg)
631                 drive->dev_flags |= IDE_DFLAG_LBA48;
632         else
633                 drive->dev_flags &= ~IDE_DFLAG_LBA48;
634
635         return 0;
636 }
637
638 ide_ext_devset_rw(acoustic, acoustic);
639 ide_ext_devset_rw(address, addressing);
640 ide_ext_devset_rw(multcount, multcount);
641 ide_ext_devset_rw(wcache, wcache);
642
643 ide_ext_devset_rw_sync(nowerr, nowerr);
644
645 static int ide_disk_check(ide_drive_t *drive, const char *s)
646 {
647         return 1;
648 }
649
650 static void ide_disk_setup(ide_drive_t *drive)
651 {
652         struct ide_disk_obj *idkp = drive->driver_data;
653         struct request_queue *q = drive->queue;
654         ide_hwif_t *hwif = drive->hwif;
655         u16 *id = drive->id;
656         char *m = (char *)&id[ATA_ID_PROD];
657         unsigned long long capacity;
658
659         ide_proc_register_driver(drive, idkp->driver);
660
661         if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0)
662                 return;
663
664         if (drive->dev_flags & IDE_DFLAG_REMOVABLE) {
665                 /*
666                  * Removable disks (eg. SYQUEST); ignore 'WD' drives
667                  */
668                 if (m[0] != 'W' || m[1] != 'D')
669                         drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
670         }
671
672         (void)set_addressing(drive, 1);
673
674         if (drive->dev_flags & IDE_DFLAG_LBA48) {
675                 int max_s = 2048;
676
677                 if (max_s > hwif->rqsize)
678                         max_s = hwif->rqsize;
679
680                 blk_queue_max_hw_sectors(q, max_s);
681         }
682
683         printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name,
684                queue_max_sectors(q) / 2);
685
686         if (ata_id_is_ssd(id))
687                 queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
688
689         /* calculate drive capacity, and select LBA if possible */
690         ide_disk_get_capacity(drive);
691
692         /*
693          * if possible, give fdisk access to more of the drive,
694          * by correcting bios_cyls:
695          */
696         capacity = ide_gd_capacity(drive);
697
698         if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) {
699                 if (ata_id_lba48_enabled(drive->id)) {
700                         /* compatibility */
701                         drive->bios_sect = 63;
702                         drive->bios_head = 255;
703                 }
704
705                 if (drive->bios_sect && drive->bios_head) {
706                         unsigned int cap0 = capacity; /* truncate to 32 bits */
707                         unsigned int cylsz, cyl;
708
709                         if (cap0 != capacity)
710                                 drive->bios_cyl = 65535;
711                         else {
712                                 cylsz = drive->bios_sect * drive->bios_head;
713                                 cyl = cap0 / cylsz;
714                                 if (cyl > 65535)
715                                         cyl = 65535;
716                                 if (cyl > drive->bios_cyl)
717                                         drive->bios_cyl = cyl;
718                         }
719                 }
720         }
721         printk(KERN_INFO "%s: %llu sectors (%llu MB)",
722                          drive->name, capacity, sectors_to_MB(capacity));
723
724         /* Only print cache size when it was specified */
725         if (id[ATA_ID_BUF_SIZE])
726                 printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2);
727
728         printk(KERN_CONT ", CHS=%d/%d/%d\n",
729                          drive->bios_cyl, drive->bios_head, drive->bios_sect);
730
731         /* write cache enabled? */
732         if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id))
733                 drive->dev_flags |= IDE_DFLAG_WCACHE;
734
735         set_wcache(drive, 1);
736
737         if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 &&
738             (drive->head == 0 || drive->head > 16)) {
739                 printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n",
740                         drive->name, drive->head);
741                 drive->dev_flags &= ~IDE_DFLAG_ATTACH;
742         } else
743                 drive->dev_flags |= IDE_DFLAG_ATTACH;
744 }
745
746 static void ide_disk_flush(ide_drive_t *drive)
747 {
748         if (ata_id_flush_enabled(drive->id) == 0 ||
749             (drive->dev_flags & IDE_DFLAG_WCACHE) == 0)
750                 return;
751
752         if (do_idedisk_flushcache(drive))
753                 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
754 }
755
756 static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk)
757 {
758         return 0;
759 }
760
761 static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk,
762                                  int on)
763 {
764         struct ide_cmd cmd;
765         int ret;
766
767         if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0)
768                 return 0;
769
770         memset(&cmd, 0, sizeof(cmd));
771         cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK;
772         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
773         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
774
775         ret = ide_no_data_taskfile(drive, &cmd);
776
777         if (ret)
778                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
779
780         return ret;
781 }
782
783 const struct ide_disk_ops ide_ata_disk_ops = {
784         .check                  = ide_disk_check,
785         .unlock_native_capacity = ide_disk_unlock_native_capacity,
786         .get_capacity           = ide_disk_get_capacity,
787         .setup                  = ide_disk_setup,
788         .flush                  = ide_disk_flush,
789         .init_media             = ide_disk_init_media,
790         .set_doorlock           = ide_disk_set_doorlock,
791         .do_request             = ide_do_rw_disk,
792         .ioctl                  = ide_disk_ioctl,
793 };