Merge branch 'fix/asoc' into for-linus
[linux-2.6] / 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)rq->nr_sectors;
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 + rq->nr_sectors > 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
188         if (!blk_fs_request(rq)) {
189                 blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command");
190                 if (rq->errors == 0)
191                         rq->errors = -EIO;
192                 ide_complete_rq(drive, -EIO, ide_rq_bytes(rq));
193                 return ide_stopped;
194         }
195
196         ledtrig_ide_activity();
197
198         pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n",
199                  drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
200                  (unsigned long long)block, rq->nr_sectors,
201                  (unsigned long)rq->buffer);
202
203         if (hwif->rw_disk)
204                 hwif->rw_disk(drive, rq);
205
206         return __ide_do_rw_disk(drive, rq, block);
207 }
208
209 /*
210  * Queries for true maximum capacity of the drive.
211  * Returns maximum LBA address (> 0) of the drive, 0 if failed.
212  */
213 static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48)
214 {
215         struct ide_cmd cmd;
216         struct ide_taskfile *tf = &cmd.tf;
217         u64 addr = 0;
218
219         memset(&cmd, 0, sizeof(cmd));
220         if (lba48)
221                 tf->command = ATA_CMD_READ_NATIVE_MAX_EXT;
222         else
223                 tf->command = ATA_CMD_READ_NATIVE_MAX;
224         tf->device  = ATA_LBA;
225
226         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
227         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
228         if (lba48) {
229                 cmd.valid.out.hob = IDE_VALID_OUT_HOB;
230                 cmd.valid.in.hob  = IDE_VALID_IN_HOB;
231                 cmd.tf_flags = IDE_TFLAG_LBA48;
232         }
233
234         ide_no_data_taskfile(drive, &cmd);
235
236         /* if OK, compute maximum address value */
237         if (!(tf->status & ATA_ERR))
238                 addr = ide_get_lba_addr(&cmd, lba48) + 1;
239
240         return addr;
241 }
242
243 /*
244  * Sets maximum virtual LBA address of the drive.
245  * Returns new maximum virtual LBA address (> 0) or 0 on failure.
246  */
247 static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48)
248 {
249         struct ide_cmd cmd;
250         struct ide_taskfile *tf = &cmd.tf;
251         u64 addr_set = 0;
252
253         addr_req--;
254
255         memset(&cmd, 0, sizeof(cmd));
256         tf->lbal     = (addr_req >>  0) & 0xff;
257         tf->lbam     = (addr_req >>= 8) & 0xff;
258         tf->lbah     = (addr_req >>= 8) & 0xff;
259         if (lba48) {
260                 cmd.hob.lbal = (addr_req >>= 8) & 0xff;
261                 cmd.hob.lbam = (addr_req >>= 8) & 0xff;
262                 cmd.hob.lbah = (addr_req >>= 8) & 0xff;
263                 tf->command  = ATA_CMD_SET_MAX_EXT;
264         } else {
265                 tf->device   = (addr_req >>= 8) & 0x0f;
266                 tf->command  = ATA_CMD_SET_MAX;
267         }
268         tf->device |= ATA_LBA;
269
270         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
271         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
272         if (lba48) {
273                 cmd.valid.out.hob = IDE_VALID_OUT_HOB;
274                 cmd.valid.in.hob  = IDE_VALID_IN_HOB;
275                 cmd.tf_flags = IDE_TFLAG_LBA48;
276         }
277
278         ide_no_data_taskfile(drive, &cmd);
279
280         /* if OK, compute maximum address value */
281         if (!(tf->status & ATA_ERR))
282                 addr_set = ide_get_lba_addr(&cmd, lba48) + 1;
283
284         return addr_set;
285 }
286
287 static unsigned long long sectors_to_MB(unsigned long long n)
288 {
289         n <<= 9;                /* make it bytes */
290         do_div(n, 1000000);     /* make it MB */
291         return n;
292 }
293
294 /*
295  * Some disks report total number of sectors instead of
296  * maximum sector address.  We list them here.
297  */
298 static const struct drive_list_entry hpa_list[] = {
299         { "ST340823A",  NULL },
300         { "ST320413A",  NULL },
301         { "ST310211A",  NULL },
302         { NULL,         NULL }
303 };
304
305 static void idedisk_check_hpa(ide_drive_t *drive)
306 {
307         unsigned long long capacity, set_max;
308         int lba48 = ata_id_lba48_enabled(drive->id);
309
310         capacity = drive->capacity64;
311
312         set_max = idedisk_read_native_max_address(drive, lba48);
313
314         if (ide_in_drive_list(drive->id, hpa_list)) {
315                 /*
316                  * Since we are inclusive wrt to firmware revisions do this
317                  * extra check and apply the workaround only when needed.
318                  */
319                 if (set_max == capacity + 1)
320                         set_max--;
321         }
322
323         if (set_max <= capacity)
324                 return;
325
326         printk(KERN_INFO "%s: Host Protected Area detected.\n"
327                          "\tcurrent capacity is %llu sectors (%llu MB)\n"
328                          "\tnative  capacity is %llu sectors (%llu MB)\n",
329                          drive->name,
330                          capacity, sectors_to_MB(capacity),
331                          set_max, sectors_to_MB(set_max));
332
333         set_max = idedisk_set_max_address(drive, set_max, lba48);
334
335         if (set_max) {
336                 drive->capacity64 = set_max;
337                 printk(KERN_INFO "%s: Host Protected Area disabled.\n",
338                                  drive->name);
339         }
340 }
341
342 static int ide_disk_get_capacity(ide_drive_t *drive)
343 {
344         u16 *id = drive->id;
345         int lba;
346
347         if (ata_id_lba48_enabled(id)) {
348                 /* drive speaks 48-bit LBA */
349                 lba = 1;
350                 drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
351         } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) {
352                 /* drive speaks 28-bit LBA */
353                 lba = 1;
354                 drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
355         } else {
356                 /* drive speaks boring old 28-bit CHS */
357                 lba = 0;
358                 drive->capacity64 = drive->cyl * drive->head * drive->sect;
359         }
360
361         if (lba) {
362                 drive->dev_flags |= IDE_DFLAG_LBA;
363
364                 /*
365                 * If this device supports the Host Protected Area feature set,
366                 * then we may need to change our opinion about its capacity.
367                 */
368                 if (ata_id_hpa_enabled(id))
369                         idedisk_check_hpa(drive);
370         }
371
372         /* limit drive capacity to 137GB if LBA48 cannot be used */
373         if ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 &&
374             drive->capacity64 > 1ULL << 28) {
375                 printk(KERN_WARNING "%s: cannot use LBA48 - full capacity "
376                        "%llu sectors (%llu MB)\n",
377                        drive->name, (unsigned long long)drive->capacity64,
378                        sectors_to_MB(drive->capacity64));
379                 drive->capacity64 = 1ULL << 28;
380         }
381
382         if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) &&
383             (drive->dev_flags & IDE_DFLAG_LBA48)) {
384                 if (drive->capacity64 > 1ULL << 28) {
385                         printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode"
386                                          " will be used for accessing sectors "
387                                          "> %u\n", drive->name, 1 << 28);
388                 } else
389                         drive->dev_flags &= ~IDE_DFLAG_LBA48;
390         }
391
392         return 0;
393 }
394
395 static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
396 {
397         ide_drive_t *drive = q->queuedata;
398         struct ide_cmd *cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);
399
400         /* FIXME: map struct ide_taskfile on rq->cmd[] */
401         BUG_ON(cmd == NULL);
402
403         memset(cmd, 0, sizeof(*cmd));
404         if (ata_id_flush_ext_enabled(drive->id) &&
405             (drive->capacity64 >= (1UL << 28)))
406                 cmd->tf.command = ATA_CMD_FLUSH_EXT;
407         else
408                 cmd->tf.command = ATA_CMD_FLUSH;
409         cmd->valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
410         cmd->tf_flags = IDE_TFLAG_DYN;
411         cmd->protocol = ATA_PROT_NODATA;
412
413         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
414         rq->cmd_flags |= REQ_SOFTBARRIER;
415         rq->special = cmd;
416 }
417
418 ide_devset_get(multcount, mult_count);
419
420 /*
421  * This is tightly woven into the driver->do_special can not touch.
422  * DON'T do it again until a total personality rewrite is committed.
423  */
424 static int set_multcount(ide_drive_t *drive, int arg)
425 {
426         struct request *rq;
427         int error;
428
429         if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff))
430                 return -EINVAL;
431
432         if (drive->special.b.set_multmode)
433                 return -EBUSY;
434
435         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
436         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
437
438         drive->mult_req = arg;
439         drive->special.b.set_multmode = 1;
440         error = blk_execute_rq(drive->queue, NULL, rq, 0);
441         blk_put_request(rq);
442
443         return (drive->mult_count == arg) ? 0 : -EIO;
444 }
445
446 ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR);
447
448 static int set_nowerr(ide_drive_t *drive, int arg)
449 {
450         if (arg < 0 || arg > 1)
451                 return -EINVAL;
452
453         if (arg)
454                 drive->dev_flags |= IDE_DFLAG_NOWERR;
455         else
456                 drive->dev_flags &= ~IDE_DFLAG_NOWERR;
457
458         drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
459
460         return 0;
461 }
462
463 static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect)
464 {
465         struct ide_cmd cmd;
466
467         memset(&cmd, 0, sizeof(cmd));
468         cmd.tf.feature = feature;
469         cmd.tf.nsect   = nsect;
470         cmd.tf.command = ATA_CMD_SET_FEATURES;
471         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
472         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
473
474         return ide_no_data_taskfile(drive, &cmd);
475 }
476
477 static void update_ordered(ide_drive_t *drive)
478 {
479         u16 *id = drive->id;
480         unsigned ordered = QUEUE_ORDERED_NONE;
481         prepare_flush_fn *prep_fn = NULL;
482
483         if (drive->dev_flags & IDE_DFLAG_WCACHE) {
484                 unsigned long long capacity;
485                 int barrier;
486                 /*
487                  * We must avoid issuing commands a drive does not
488                  * understand or we may crash it. We check flush cache
489                  * is supported. We also check we have the LBA48 flush
490                  * cache if the drive capacity is too large. By this
491                  * time we have trimmed the drive capacity if LBA48 is
492                  * not available so we don't need to recheck that.
493                  */
494                 capacity = ide_gd_capacity(drive);
495                 barrier = ata_id_flush_enabled(id) &&
496                         (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 &&
497                         ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 ||
498                          capacity <= (1ULL << 28) ||
499                          ata_id_flush_ext_enabled(id));
500
501                 printk(KERN_INFO "%s: cache flushes %ssupported\n",
502                        drive->name, barrier ? "" : "not ");
503
504                 if (barrier) {
505                         ordered = QUEUE_ORDERED_DRAIN_FLUSH;
506                         prep_fn = idedisk_prepare_flush;
507                 }
508         } else
509                 ordered = QUEUE_ORDERED_DRAIN;
510
511         blk_queue_ordered(drive->queue, ordered, prep_fn);
512 }
513
514 ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE);
515
516 static int set_wcache(ide_drive_t *drive, int arg)
517 {
518         int err = 1;
519
520         if (arg < 0 || arg > 1)
521                 return -EINVAL;
522
523         if (ata_id_flush_enabled(drive->id)) {
524                 err = ide_do_setfeature(drive,
525                         arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0);
526                 if (err == 0) {
527                         if (arg)
528                                 drive->dev_flags |= IDE_DFLAG_WCACHE;
529                         else
530                                 drive->dev_flags &= ~IDE_DFLAG_WCACHE;
531                 }
532         }
533
534         update_ordered(drive);
535
536         return err;
537 }
538
539 static int do_idedisk_flushcache(ide_drive_t *drive)
540 {
541         struct ide_cmd cmd;
542
543         memset(&cmd, 0, sizeof(cmd));
544         if (ata_id_flush_ext_enabled(drive->id))
545                 cmd.tf.command = ATA_CMD_FLUSH_EXT;
546         else
547                 cmd.tf.command = ATA_CMD_FLUSH;
548         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
549         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
550
551         return ide_no_data_taskfile(drive, &cmd);
552 }
553
554 ide_devset_get(acoustic, acoustic);
555
556 static int set_acoustic(ide_drive_t *drive, int arg)
557 {
558         if (arg < 0 || arg > 254)
559                 return -EINVAL;
560
561         ide_do_setfeature(drive,
562                 arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg);
563
564         drive->acoustic = arg;
565
566         return 0;
567 }
568
569 ide_devset_get_flag(addressing, IDE_DFLAG_LBA48);
570
571 /*
572  * drive->addressing:
573  *      0: 28-bit
574  *      1: 48-bit
575  *      2: 48-bit capable doing 28-bit
576  */
577 static int set_addressing(ide_drive_t *drive, int arg)
578 {
579         if (arg < 0 || arg > 2)
580                 return -EINVAL;
581
582         if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
583             ata_id_lba48_enabled(drive->id) == 0))
584                 return -EIO;
585
586         if (arg == 2)
587                 arg = 0;
588
589         if (arg)
590                 drive->dev_flags |= IDE_DFLAG_LBA48;
591         else
592                 drive->dev_flags &= ~IDE_DFLAG_LBA48;
593
594         return 0;
595 }
596
597 ide_ext_devset_rw(acoustic, acoustic);
598 ide_ext_devset_rw(address, addressing);
599 ide_ext_devset_rw(multcount, multcount);
600 ide_ext_devset_rw(wcache, wcache);
601
602 ide_ext_devset_rw_sync(nowerr, nowerr);
603
604 static int ide_disk_check(ide_drive_t *drive, const char *s)
605 {
606         return 1;
607 }
608
609 static void ide_disk_setup(ide_drive_t *drive)
610 {
611         struct ide_disk_obj *idkp = drive->driver_data;
612         struct request_queue *q = drive->queue;
613         ide_hwif_t *hwif = drive->hwif;
614         u16 *id = drive->id;
615         char *m = (char *)&id[ATA_ID_PROD];
616         unsigned long long capacity;
617
618         ide_proc_register_driver(drive, idkp->driver);
619
620         if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0)
621                 return;
622
623         if (drive->dev_flags & IDE_DFLAG_REMOVABLE) {
624                 /*
625                  * Removable disks (eg. SYQUEST); ignore 'WD' drives
626                  */
627                 if (m[0] != 'W' || m[1] != 'D')
628                         drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
629         }
630
631         (void)set_addressing(drive, 1);
632
633         if (drive->dev_flags & IDE_DFLAG_LBA48) {
634                 int max_s = 2048;
635
636                 if (max_s > hwif->rqsize)
637                         max_s = hwif->rqsize;
638
639                 blk_queue_max_sectors(q, max_s);
640         }
641
642         printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name,
643                 q->max_sectors / 2);
644
645         if (ata_id_is_ssd(id))
646                 queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
647
648         /* calculate drive capacity, and select LBA if possible */
649         ide_disk_get_capacity(drive);
650
651         /*
652          * if possible, give fdisk access to more of the drive,
653          * by correcting bios_cyls:
654          */
655         capacity = ide_gd_capacity(drive);
656
657         if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) {
658                 if (ata_id_lba48_enabled(drive->id)) {
659                         /* compatibility */
660                         drive->bios_sect = 63;
661                         drive->bios_head = 255;
662                 }
663
664                 if (drive->bios_sect && drive->bios_head) {
665                         unsigned int cap0 = capacity; /* truncate to 32 bits */
666                         unsigned int cylsz, cyl;
667
668                         if (cap0 != capacity)
669                                 drive->bios_cyl = 65535;
670                         else {
671                                 cylsz = drive->bios_sect * drive->bios_head;
672                                 cyl = cap0 / cylsz;
673                                 if (cyl > 65535)
674                                         cyl = 65535;
675                                 if (cyl > drive->bios_cyl)
676                                         drive->bios_cyl = cyl;
677                         }
678                 }
679         }
680         printk(KERN_INFO "%s: %llu sectors (%llu MB)",
681                          drive->name, capacity, sectors_to_MB(capacity));
682
683         /* Only print cache size when it was specified */
684         if (id[ATA_ID_BUF_SIZE])
685                 printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2);
686
687         printk(KERN_CONT ", CHS=%d/%d/%d\n",
688                          drive->bios_cyl, drive->bios_head, drive->bios_sect);
689
690         /* write cache enabled? */
691         if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id))
692                 drive->dev_flags |= IDE_DFLAG_WCACHE;
693
694         set_wcache(drive, 1);
695
696         if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 &&
697             (drive->head == 0 || drive->head > 16)) {
698                 printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n",
699                         drive->name, drive->head);
700                 drive->dev_flags &= ~IDE_DFLAG_ATTACH;
701         } else
702                 drive->dev_flags |= IDE_DFLAG_ATTACH;
703 }
704
705 static void ide_disk_flush(ide_drive_t *drive)
706 {
707         if (ata_id_flush_enabled(drive->id) == 0 ||
708             (drive->dev_flags & IDE_DFLAG_WCACHE) == 0)
709                 return;
710
711         if (do_idedisk_flushcache(drive))
712                 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
713 }
714
715 static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk)
716 {
717         return 0;
718 }
719
720 static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk,
721                                  int on)
722 {
723         struct ide_cmd cmd;
724         int ret;
725
726         if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0)
727                 return 0;
728
729         memset(&cmd, 0, sizeof(cmd));
730         cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK;
731         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
732         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
733
734         ret = ide_no_data_taskfile(drive, &cmd);
735
736         if (ret)
737                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
738
739         return ret;
740 }
741
742 const struct ide_disk_ops ide_ata_disk_ops = {
743         .check          = ide_disk_check,
744         .get_capacity   = ide_disk_get_capacity,
745         .setup          = ide_disk_setup,
746         .flush          = ide_disk_flush,
747         .init_media     = ide_disk_init_media,
748         .set_doorlock   = ide_disk_set_doorlock,
749         .do_request     = ide_do_rw_disk,
750         .ioctl          = ide_disk_ioctl,
751 };