Merge commit 'v2.6.28-rc8' into x86/mm
[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 #include <linux/hdreg.h>
32
33 #include <asm/byteorder.h>
34 #include <asm/irq.h>
35 #include <asm/uaccess.h>
36 #include <asm/io.h>
37 #include <asm/div64.h>
38
39 #include "ide-disk.h"
40
41 static const u8 ide_rw_cmds[] = {
42         ATA_CMD_READ_MULTI,
43         ATA_CMD_WRITE_MULTI,
44         ATA_CMD_READ_MULTI_EXT,
45         ATA_CMD_WRITE_MULTI_EXT,
46         ATA_CMD_PIO_READ,
47         ATA_CMD_PIO_WRITE,
48         ATA_CMD_PIO_READ_EXT,
49         ATA_CMD_PIO_WRITE_EXT,
50         ATA_CMD_READ,
51         ATA_CMD_WRITE,
52         ATA_CMD_READ_EXT,
53         ATA_CMD_WRITE_EXT,
54 };
55
56 static const u8 ide_data_phases[] = {
57         TASKFILE_MULTI_IN,
58         TASKFILE_MULTI_OUT,
59         TASKFILE_IN,
60         TASKFILE_OUT,
61         TASKFILE_IN_DMA,
62         TASKFILE_OUT_DMA,
63 };
64
65 static void ide_tf_set_cmd(ide_drive_t *drive, ide_task_t *task, u8 dma)
66 {
67         u8 index, lba48, write;
68
69         lba48 = (task->tf_flags & IDE_TFLAG_LBA48) ? 2 : 0;
70         write = (task->tf_flags & IDE_TFLAG_WRITE) ? 1 : 0;
71
72         if (dma)
73                 index = 8;
74         else
75                 index = drive->mult_count ? 0 : 4;
76
77         task->tf.command = ide_rw_cmds[index + lba48 + write];
78
79         if (dma)
80                 index = 8; /* fixup index */
81
82         task->data_phase = ide_data_phases[index / 2 + write];
83 }
84
85 /*
86  * __ide_do_rw_disk() issues READ and WRITE commands to a disk,
87  * using LBA if supported, or CHS otherwise, to address sectors.
88  */
89 static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
90                                         sector_t block)
91 {
92         ide_hwif_t *hwif        = HWIF(drive);
93         u16 nsectors            = (u16)rq->nr_sectors;
94         u8 lba48                = !!(drive->dev_flags & IDE_DFLAG_LBA48);
95         u8 dma                  = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
96         ide_task_t              task;
97         struct ide_taskfile     *tf = &task.tf;
98         ide_startstop_t         rc;
99
100         if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) {
101                 if (block + rq->nr_sectors > 1ULL << 28)
102                         dma = 0;
103                 else
104                         lba48 = 0;
105         }
106
107         if (!dma) {
108                 ide_init_sg_cmd(drive, rq);
109                 ide_map_sg(drive, rq);
110         }
111
112         memset(&task, 0, sizeof(task));
113         task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
114
115         if (drive->dev_flags & IDE_DFLAG_LBA) {
116                 if (lba48) {
117                         pr_debug("%s: LBA=0x%012llx\n", drive->name,
118                                         (unsigned long long)block);
119
120                         tf->hob_nsect = (nsectors >> 8) & 0xff;
121                         tf->hob_lbal  = (u8)(block >> 24);
122                         if (sizeof(block) != 4) {
123                                 tf->hob_lbam = (u8)((u64)block >> 32);
124                                 tf->hob_lbah = (u8)((u64)block >> 40);
125                         }
126
127                         tf->nsect  = nsectors & 0xff;
128                         tf->lbal   = (u8) block;
129                         tf->lbam   = (u8)(block >>  8);
130                         tf->lbah   = (u8)(block >> 16);
131
132                         task.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB);
133                 } else {
134                         tf->nsect  = nsectors & 0xff;
135                         tf->lbal   = block;
136                         tf->lbam   = block >>= 8;
137                         tf->lbah   = block >>= 8;
138                         tf->device = (block >> 8) & 0xf;
139                 }
140
141                 tf->device |= ATA_LBA;
142         } else {
143                 unsigned int sect, head, cyl, track;
144
145                 track = (int)block / drive->sect;
146                 sect  = (int)block % drive->sect + 1;
147                 head  = track % drive->head;
148                 cyl   = track / drive->head;
149
150                 pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect);
151
152                 tf->nsect  = nsectors & 0xff;
153                 tf->lbal   = sect;
154                 tf->lbam   = cyl;
155                 tf->lbah   = cyl >> 8;
156                 tf->device = head;
157         }
158
159         if (rq_data_dir(rq))
160                 task.tf_flags |= IDE_TFLAG_WRITE;
161
162         ide_tf_set_cmd(drive, &task, dma);
163         if (!dma)
164                 hwif->data_phase = task.data_phase;
165         task.rq = rq;
166
167         rc = do_rw_taskfile(drive, &task);
168
169         if (rc == ide_stopped && dma) {
170                 /* fallback to PIO */
171                 task.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK;
172                 ide_tf_set_cmd(drive, &task, 0);
173                 hwif->data_phase = task.data_phase;
174                 ide_init_sg_cmd(drive, rq);
175                 rc = do_rw_taskfile(drive, &task);
176         }
177
178         return rc;
179 }
180
181 /*
182  * 268435455  == 137439 MB or 28bit limit
183  * 320173056  == 163929 MB or 48bit addressing
184  * 1073741822 == 549756 MB or 48bit addressing fake drive
185  */
186
187 static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
188                                       sector_t block)
189 {
190         ide_hwif_t *hwif = HWIF(drive);
191
192         BUG_ON(drive->dev_flags & IDE_DFLAG_BLOCKED);
193
194         if (!blk_fs_request(rq)) {
195                 blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command");
196                 ide_end_request(drive, 0, 0);
197                 return ide_stopped;
198         }
199
200         ledtrig_ide_activity();
201
202         pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n",
203                  drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
204                  (unsigned long long)block, rq->nr_sectors,
205                  (unsigned long)rq->buffer);
206
207         if (hwif->rw_disk)
208                 hwif->rw_disk(drive, rq);
209
210         return __ide_do_rw_disk(drive, rq, block);
211 }
212
213 /*
214  * Queries for true maximum capacity of the drive.
215  * Returns maximum LBA address (> 0) of the drive, 0 if failed.
216  */
217 static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48)
218 {
219         ide_task_t args;
220         struct ide_taskfile *tf = &args.tf;
221         u64 addr = 0;
222
223         /* Create IDE/ATA command request structure */
224         memset(&args, 0, sizeof(ide_task_t));
225         if (lba48)
226                 tf->command = ATA_CMD_READ_NATIVE_MAX_EXT;
227         else
228                 tf->command = ATA_CMD_READ_NATIVE_MAX;
229         tf->device  = ATA_LBA;
230         args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
231         if (lba48)
232                 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB);
233         /* submit command request */
234         ide_no_data_taskfile(drive, &args);
235
236         /* if OK, compute maximum address value */
237         if ((tf->status & 0x01) == 0)
238                 addr = ide_get_lba_addr(tf, 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         ide_task_t args;
250         struct ide_taskfile *tf = &args.tf;
251         u64 addr_set = 0;
252
253         addr_req--;
254         /* Create IDE/ATA command request structure */
255         memset(&args, 0, sizeof(ide_task_t));
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                 tf->hob_lbal = (addr_req >>= 8) & 0xff;
261                 tf->hob_lbam = (addr_req >>= 8) & 0xff;
262                 tf->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         args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
270         if (lba48)
271                 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB);
272         /* submit command request */
273         ide_no_data_taskfile(drive, &args);
274         /* if OK, compute maximum address value */
275         if ((tf->status & 0x01) == 0)
276                 addr_set = ide_get_lba_addr(tf, lba48) + 1;
277
278         return addr_set;
279 }
280
281 static unsigned long long sectors_to_MB(unsigned long long n)
282 {
283         n <<= 9;                /* make it bytes */
284         do_div(n, 1000000);     /* make it MB */
285         return n;
286 }
287
288 /*
289  * Some disks report total number of sectors instead of
290  * maximum sector address.  We list them here.
291  */
292 static const struct drive_list_entry hpa_list[] = {
293         { "ST340823A",  NULL },
294         { "ST320413A",  NULL },
295         { "ST310211A",  NULL },
296         { NULL,         NULL }
297 };
298
299 static void idedisk_check_hpa(ide_drive_t *drive)
300 {
301         unsigned long long capacity, set_max;
302         int lba48 = ata_id_lba48_enabled(drive->id);
303
304         capacity = drive->capacity64;
305
306         set_max = idedisk_read_native_max_address(drive, lba48);
307
308         if (ide_in_drive_list(drive->id, hpa_list)) {
309                 /*
310                  * Since we are inclusive wrt to firmware revisions do this
311                  * extra check and apply the workaround only when needed.
312                  */
313                 if (set_max == capacity + 1)
314                         set_max--;
315         }
316
317         if (set_max <= capacity)
318                 return;
319
320         printk(KERN_INFO "%s: Host Protected Area detected.\n"
321                          "\tcurrent capacity is %llu sectors (%llu MB)\n"
322                          "\tnative  capacity is %llu sectors (%llu MB)\n",
323                          drive->name,
324                          capacity, sectors_to_MB(capacity),
325                          set_max, sectors_to_MB(set_max));
326
327         set_max = idedisk_set_max_address(drive, set_max, lba48);
328
329         if (set_max) {
330                 drive->capacity64 = set_max;
331                 printk(KERN_INFO "%s: Host Protected Area disabled.\n",
332                                  drive->name);
333         }
334 }
335
336 static int ide_disk_get_capacity(ide_drive_t *drive)
337 {
338         u16 *id = drive->id;
339         int lba;
340
341         if (ata_id_lba48_enabled(id)) {
342                 /* drive speaks 48-bit LBA */
343                 lba = 1;
344                 drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
345         } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) {
346                 /* drive speaks 28-bit LBA */
347                 lba = 1;
348                 drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
349         } else {
350                 /* drive speaks boring old 28-bit CHS */
351                 lba = 0;
352                 drive->capacity64 = drive->cyl * drive->head * drive->sect;
353         }
354
355         if (lba) {
356                 drive->dev_flags |= IDE_DFLAG_LBA;
357
358                 /*
359                 * If this device supports the Host Protected Area feature set,
360                 * then we may need to change our opinion about its capacity.
361                 */
362                 if (ata_id_hpa_enabled(id))
363                         idedisk_check_hpa(drive);
364         }
365
366         /* limit drive capacity to 137GB if LBA48 cannot be used */
367         if ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 &&
368             drive->capacity64 > 1ULL << 28) {
369                 printk(KERN_WARNING "%s: cannot use LBA48 - full capacity "
370                        "%llu sectors (%llu MB)\n",
371                        drive->name, (unsigned long long)drive->capacity64,
372                        sectors_to_MB(drive->capacity64));
373                 drive->capacity64 = 1ULL << 28;
374         }
375
376         if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) &&
377             (drive->dev_flags & IDE_DFLAG_LBA48)) {
378                 if (drive->capacity64 > 1ULL << 28) {
379                         printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode"
380                                          " will be used for accessing sectors "
381                                          "> %u\n", drive->name, 1 << 28);
382                 } else
383                         drive->dev_flags &= ~IDE_DFLAG_LBA48;
384         }
385
386         return 0;
387 }
388
389 static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
390 {
391         ide_drive_t *drive = q->queuedata;
392         ide_task_t *task = kmalloc(sizeof(*task), GFP_ATOMIC);
393
394         /* FIXME: map struct ide_taskfile on rq->cmd[] */
395         BUG_ON(task == NULL);
396
397         memset(task, 0, sizeof(*task));
398         if (ata_id_flush_ext_enabled(drive->id) &&
399             (drive->capacity64 >= (1UL << 28)))
400                 task->tf.command = ATA_CMD_FLUSH_EXT;
401         else
402                 task->tf.command = ATA_CMD_FLUSH;
403         task->tf_flags   = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE |
404                            IDE_TFLAG_DYN;
405         task->data_phase = TASKFILE_NO_DATA;
406
407         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
408         rq->cmd_flags |= REQ_SOFTBARRIER;
409         rq->special = task;
410 }
411
412 ide_devset_get(multcount, mult_count);
413
414 /*
415  * This is tightly woven into the driver->do_special can not touch.
416  * DON'T do it again until a total personality rewrite is committed.
417  */
418 static int set_multcount(ide_drive_t *drive, int arg)
419 {
420         struct request *rq;
421         int error;
422
423         if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff))
424                 return -EINVAL;
425
426         if (drive->special.b.set_multmode)
427                 return -EBUSY;
428
429         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
430         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
431
432         drive->mult_req = arg;
433         drive->special.b.set_multmode = 1;
434         error = blk_execute_rq(drive->queue, NULL, rq, 0);
435         blk_put_request(rq);
436
437         return (drive->mult_count == arg) ? 0 : -EIO;
438 }
439
440 ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR);
441
442 static int set_nowerr(ide_drive_t *drive, int arg)
443 {
444         if (arg < 0 || arg > 1)
445                 return -EINVAL;
446
447         if (arg)
448                 drive->dev_flags |= IDE_DFLAG_NOWERR;
449         else
450                 drive->dev_flags &= ~IDE_DFLAG_NOWERR;
451
452         drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
453
454         return 0;
455 }
456
457 static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect)
458 {
459         ide_task_t task;
460
461         memset(&task, 0, sizeof(task));
462         task.tf.feature = feature;
463         task.tf.nsect   = nsect;
464         task.tf.command = ATA_CMD_SET_FEATURES;
465         task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
466
467         return ide_no_data_taskfile(drive, &task);
468 }
469
470 static void update_ordered(ide_drive_t *drive)
471 {
472         u16 *id = drive->id;
473         unsigned ordered = QUEUE_ORDERED_NONE;
474         prepare_flush_fn *prep_fn = NULL;
475
476         if (drive->dev_flags & IDE_DFLAG_WCACHE) {
477                 unsigned long long capacity;
478                 int barrier;
479                 /*
480                  * We must avoid issuing commands a drive does not
481                  * understand or we may crash it. We check flush cache
482                  * is supported. We also check we have the LBA48 flush
483                  * cache if the drive capacity is too large. By this
484                  * time we have trimmed the drive capacity if LBA48 is
485                  * not available so we don't need to recheck that.
486                  */
487                 capacity = ide_gd_capacity(drive);
488                 barrier = ata_id_flush_enabled(id) &&
489                         (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 &&
490                         ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 ||
491                          capacity <= (1ULL << 28) ||
492                          ata_id_flush_ext_enabled(id));
493
494                 printk(KERN_INFO "%s: cache flushes %ssupported\n",
495                        drive->name, barrier ? "" : "not ");
496
497                 if (barrier) {
498                         ordered = QUEUE_ORDERED_DRAIN_FLUSH;
499                         prep_fn = idedisk_prepare_flush;
500                 }
501         } else
502                 ordered = QUEUE_ORDERED_DRAIN;
503
504         blk_queue_ordered(drive->queue, ordered, prep_fn);
505 }
506
507 ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE);
508
509 static int set_wcache(ide_drive_t *drive, int arg)
510 {
511         int err = 1;
512
513         if (arg < 0 || arg > 1)
514                 return -EINVAL;
515
516         if (ata_id_flush_enabled(drive->id)) {
517                 err = ide_do_setfeature(drive,
518                         arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0);
519                 if (err == 0) {
520                         if (arg)
521                                 drive->dev_flags |= IDE_DFLAG_WCACHE;
522                         else
523                                 drive->dev_flags &= ~IDE_DFLAG_WCACHE;
524                 }
525         }
526
527         update_ordered(drive);
528
529         return err;
530 }
531
532 static int do_idedisk_flushcache(ide_drive_t *drive)
533 {
534         ide_task_t args;
535
536         memset(&args, 0, sizeof(ide_task_t));
537         if (ata_id_flush_ext_enabled(drive->id))
538                 args.tf.command = ATA_CMD_FLUSH_EXT;
539         else
540                 args.tf.command = ATA_CMD_FLUSH;
541         args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
542         return ide_no_data_taskfile(drive, &args);
543 }
544
545 ide_devset_get(acoustic, acoustic);
546
547 static int set_acoustic(ide_drive_t *drive, int arg)
548 {
549         if (arg < 0 || arg > 254)
550                 return -EINVAL;
551
552         ide_do_setfeature(drive,
553                 arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg);
554
555         drive->acoustic = arg;
556
557         return 0;
558 }
559
560 ide_devset_get_flag(addressing, IDE_DFLAG_LBA48);
561
562 /*
563  * drive->addressing:
564  *      0: 28-bit
565  *      1: 48-bit
566  *      2: 48-bit capable doing 28-bit
567  */
568 static int set_addressing(ide_drive_t *drive, int arg)
569 {
570         if (arg < 0 || arg > 2)
571                 return -EINVAL;
572
573         if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
574             ata_id_lba48_enabled(drive->id) == 0))
575                 return -EIO;
576
577         if (arg == 2)
578                 arg = 0;
579
580         if (arg)
581                 drive->dev_flags |= IDE_DFLAG_LBA48;
582         else
583                 drive->dev_flags &= ~IDE_DFLAG_LBA48;
584
585         return 0;
586 }
587
588 ide_ext_devset_rw(acoustic, acoustic);
589 ide_ext_devset_rw(address, addressing);
590 ide_ext_devset_rw(multcount, multcount);
591 ide_ext_devset_rw(wcache, wcache);
592
593 ide_ext_devset_rw_sync(nowerr, nowerr);
594
595 static int ide_disk_check(ide_drive_t *drive, const char *s)
596 {
597         return 1;
598 }
599
600 static void ide_disk_setup(ide_drive_t *drive)
601 {
602         struct ide_disk_obj *idkp = drive->driver_data;
603         struct request_queue *q = drive->queue;
604         ide_hwif_t *hwif = drive->hwif;
605         u16 *id = drive->id;
606         char *m = (char *)&id[ATA_ID_PROD];
607         unsigned long long capacity;
608
609         ide_proc_register_driver(drive, idkp->driver);
610
611         if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0)
612                 return;
613
614         if (drive->dev_flags & IDE_DFLAG_REMOVABLE) {
615                 /*
616                  * Removable disks (eg. SYQUEST); ignore 'WD' drives
617                  */
618                 if (m[0] != 'W' || m[1] != 'D')
619                         drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
620         }
621
622         (void)set_addressing(drive, 1);
623
624         if (drive->dev_flags & IDE_DFLAG_LBA48) {
625                 int max_s = 2048;
626
627                 if (max_s > hwif->rqsize)
628                         max_s = hwif->rqsize;
629
630                 blk_queue_max_sectors(q, max_s);
631         }
632
633         printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name,
634                 q->max_sectors / 2);
635
636         if (ata_id_is_ssd(id) || ata_id_is_cfa(id))
637                 queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
638
639         /* calculate drive capacity, and select LBA if possible */
640         ide_disk_get_capacity(drive);
641
642         /*
643          * if possible, give fdisk access to more of the drive,
644          * by correcting bios_cyls:
645          */
646         capacity = ide_gd_capacity(drive);
647
648         if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) {
649                 if (ata_id_lba48_enabled(drive->id)) {
650                         /* compatibility */
651                         drive->bios_sect = 63;
652                         drive->bios_head = 255;
653                 }
654
655                 if (drive->bios_sect && drive->bios_head) {
656                         unsigned int cap0 = capacity; /* truncate to 32 bits */
657                         unsigned int cylsz, cyl;
658
659                         if (cap0 != capacity)
660                                 drive->bios_cyl = 65535;
661                         else {
662                                 cylsz = drive->bios_sect * drive->bios_head;
663                                 cyl = cap0 / cylsz;
664                                 if (cyl > 65535)
665                                         cyl = 65535;
666                                 if (cyl > drive->bios_cyl)
667                                         drive->bios_cyl = cyl;
668                         }
669                 }
670         }
671         printk(KERN_INFO "%s: %llu sectors (%llu MB)",
672                          drive->name, capacity, sectors_to_MB(capacity));
673
674         /* Only print cache size when it was specified */
675         if (id[ATA_ID_BUF_SIZE])
676                 printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2);
677
678         printk(KERN_CONT ", CHS=%d/%d/%d\n",
679                          drive->bios_cyl, drive->bios_head, drive->bios_sect);
680
681         /* write cache enabled? */
682         if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id))
683                 drive->dev_flags |= IDE_DFLAG_WCACHE;
684
685         set_wcache(drive, 1);
686
687         if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 &&
688             (drive->head == 0 || drive->head > 16)) {
689                 printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n",
690                         drive->name, drive->head);
691                 drive->dev_flags &= ~IDE_DFLAG_ATTACH;
692         } else
693                 drive->dev_flags |= IDE_DFLAG_ATTACH;
694 }
695
696 static void ide_disk_flush(ide_drive_t *drive)
697 {
698         if (ata_id_flush_enabled(drive->id) == 0 ||
699             (drive->dev_flags & IDE_DFLAG_WCACHE) == 0)
700                 return;
701
702         if (do_idedisk_flushcache(drive))
703                 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
704 }
705
706 static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk)
707 {
708         return 0;
709 }
710
711 static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk,
712                                  int on)
713 {
714         ide_task_t task;
715         int ret;
716
717         if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0)
718                 return 0;
719
720         memset(&task, 0, sizeof(task));
721         task.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK;
722         task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
723
724         ret = ide_no_data_taskfile(drive, &task);
725
726         if (ret)
727                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
728
729         return ret;
730 }
731
732 const struct ide_disk_ops ide_ata_disk_ops = {
733         .check          = ide_disk_check,
734         .get_capacity   = ide_disk_get_capacity,
735         .setup          = ide_disk_setup,
736         .flush          = ide_disk_flush,
737         .init_media     = ide_disk_init_media,
738         .set_doorlock   = ide_disk_set_doorlock,
739         .do_request     = ide_do_rw_disk,
740         .end_request    = ide_end_request,
741         .ioctl          = ide_disk_ioctl,
742 };