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[PARISC] Fix and cleanup ioremap.c to work with 4level-fixup.h
[linux-2.6.git] / drivers / ide / ide-disk.c
blobcab362ea03360a1bc4586ebec338cf2cadf74418
1 /*
2 * linux/drivers/ide/ide-disk.c Version 1.18 Mar 05, 2003
3 *
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
5 * Copyright (C) 1998-2002 Linux ATA Development
6 * Andre Hedrick <andre@linux-ide.org>
7 * Copyright (C) 2003 Red Hat <alan@redhat.com>
8 */
9
10 /*
11 * Mostly written by Mark Lord <mlord@pobox.com>
12 * and Gadi Oxman <gadio@netvision.net.il>
13 * and Andre Hedrick <andre@linux-ide.org>
14 *
15 * This is the IDE/ATA disk driver, as evolved from hd.c and ide.c.
16 *
17 * Version 1.00 move disk only code from ide.c to ide-disk.c
18 * support optional byte-swapping of all data
19 * Version 1.01 fix previous byte-swapping code
20 * Version 1.02 remove ", LBA" from drive identification msgs
21 * Version 1.03 fix display of id->buf_size for big-endian
22 * Version 1.04 add /proc configurable settings and S.M.A.R.T support
23 * Version 1.05 add capacity support for ATA3 >= 8GB
24 * Version 1.06 get boot-up messages to show full cyl count
25 * Version 1.07 disable door-locking if it fails
26 * Version 1.08 fixed CHS/LBA translations for ATA4 > 8GB,
27 * process of adding new ATA4 compliance.
28 * fixed problems in allowing fdisk to see
29 * the entire disk.
30 * Version 1.09 added increment of rq->sector in ide_multwrite
31 * added UDMA 3/4 reporting
32 * Version 1.10 request queue changes, Ultra DMA 100
33 * Version 1.11 added 48-bit lba
34 * Version 1.12 adding taskfile io access method
35 * Version 1.13 added standby and flush-cache for notifier
36 * Version 1.14 added acoustic-wcache
37 * Version 1.15 convert all calls to ide_raw_taskfile
38 * since args will return register content.
39 * Version 1.16 added suspend-resume-checkpower
40 * Version 1.17 do flush on standy, do flush on ATA < ATA6
41 * fix wcache setup.
42 */
43
44 #define IDEDISK_VERSION "1.18"
45
46 #undef REALLY_SLOW_IO /* most systems can safely undef this */
47
48 //#define DEBUG
49
50 #include <linux/config.h>
51 #include <linux/module.h>
52 #include <linux/types.h>
53 #include <linux/string.h>
54 #include <linux/kernel.h>
55 #include <linux/timer.h>
56 #include <linux/mm.h>
57 #include <linux/interrupt.h>
58 #include <linux/major.h>
59 #include <linux/errno.h>
60 #include <linux/genhd.h>
61 #include <linux/slab.h>
62 #include <linux/delay.h>
63
64 #define _IDE_DISK
65
66 #include <linux/ide.h>
67
68 #include <asm/byteorder.h>
69 #include <asm/irq.h>
70 #include <asm/uaccess.h>
71 #include <asm/io.h>
72 #include <asm/div64.h>
73
74 struct ide_disk_obj {
75 ide_drive_t *drive;
76 ide_driver_t *driver;
77 struct gendisk *disk;
78 struct kref kref;
79 };
80
81 static DECLARE_MUTEX(idedisk_ref_sem);
82
83 #define to_ide_disk(obj) container_of(obj, struct ide_disk_obj, kref)
84
85 #define ide_disk_g(disk) \
86 container_of((disk)->private_data, struct ide_disk_obj, driver)
87
88 static struct ide_disk_obj *ide_disk_get(struct gendisk *disk)
89 {
90 struct ide_disk_obj *idkp = NULL;
91
92 down(&idedisk_ref_sem);
93 idkp = ide_disk_g(disk);
94 if (idkp)
95 kref_get(&idkp->kref);
96 up(&idedisk_ref_sem);
97 return idkp;
98 }
99
100 static void ide_disk_release(struct kref *);
101
102 static void ide_disk_put(struct ide_disk_obj *idkp)
103 {
104 down(&idedisk_ref_sem);
105 kref_put(&idkp->kref, ide_disk_release);
106 up(&idedisk_ref_sem);
107 }
108
109 /*
110 * lba_capacity_is_ok() performs a sanity check on the claimed "lba_capacity"
111 * value for this drive (from its reported identification information).
112 *
113 * Returns: 1 if lba_capacity looks sensible
114 * 0 otherwise
115 *
116 * It is called only once for each drive.
117 */
118 static int lba_capacity_is_ok (struct hd_driveid *id)
119 {
120 unsigned long lba_sects, chs_sects, head, tail;
121
122 /* No non-LBA info .. so valid! */
123 if (id->cyls == 0)
124 return 1;
125
126 /*
127 * The ATA spec tells large drives to return
128 * C/H/S = 16383/16/63 independent of their size.
129 * Some drives can be jumpered to use 15 heads instead of 16.
130 * Some drives can be jumpered to use 4092 cyls instead of 16383.
131 */
132 if ((id->cyls == 16383
133 || (id->cyls == 4092 && id->cur_cyls == 16383)) &&
134 id->sectors == 63 &&
135 (id->heads == 15 || id->heads == 16) &&
136 (id->lba_capacity >= 16383*63*id->heads))
137 return 1;
138
139 lba_sects = id->lba_capacity;
140 chs_sects = id->cyls * id->heads * id->sectors;
141
142 /* perform a rough sanity check on lba_sects: within 10% is OK */
143 if ((lba_sects - chs_sects) < chs_sects/10)
144 return 1;
145
146 /* some drives have the word order reversed */
147 head = ((lba_sects >> 16) & 0xffff);
148 tail = (lba_sects & 0xffff);
149 lba_sects = (head | (tail << 16));
150 if ((lba_sects - chs_sects) < chs_sects/10) {
151 id->lba_capacity = lba_sects;
152 return 1; /* lba_capacity is (now) good */
153 }
154
155 return 0; /* lba_capacity value may be bad */
156 }
157
158 /*
159 * __ide_do_rw_disk() issues READ and WRITE commands to a disk,
160 * using LBA if supported, or CHS otherwise, to address sectors.
161 */
162 static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq, sector_t block)
163 {
164 ide_hwif_t *hwif = HWIF(drive);
165 unsigned int dma = drive->using_dma;
166 u8 lba48 = (drive->addressing == 1) ? 1 : 0;
167 task_ioreg_t command = WIN_NOP;
168 ata_nsector_t nsectors;
169
170 nsectors.all = (u16) rq->nr_sectors;
171
172 if (hwif->no_lba48_dma && lba48 && dma) {
173 if (block + rq->nr_sectors > 1ULL << 28)
174 dma = 0;
175 else
176 lba48 = 0;
177 }
178
179 if (!dma) {
180 ide_init_sg_cmd(drive, rq);
181 ide_map_sg(drive, rq);
182 }
183
184 if (IDE_CONTROL_REG)
185 hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
186
187 /* FIXME: SELECT_MASK(drive, 0) ? */
188
189 if (drive->select.b.lba) {
190 if (lba48) {
191 task_ioreg_t tasklets[10];
192
193 pr_debug("%s: LBA=0x%012llx\n", drive->name, block);
194
195 tasklets[0] = 0;
196 tasklets[1] = 0;
197 tasklets[2] = nsectors.b.low;
198 tasklets[3] = nsectors.b.high;
199 tasklets[4] = (task_ioreg_t) block;
200 tasklets[5] = (task_ioreg_t) (block>>8);
201 tasklets[6] = (task_ioreg_t) (block>>16);
202 tasklets[7] = (task_ioreg_t) (block>>24);
203 if (sizeof(block) == 4) {
204 tasklets[8] = (task_ioreg_t) 0;
205 tasklets[9] = (task_ioreg_t) 0;
206 } else {
207 tasklets[8] = (task_ioreg_t)((u64)block >> 32);
208 tasklets[9] = (task_ioreg_t)((u64)block >> 40);
209 }
210 #ifdef DEBUG
211 printk("%s: 0x%02x%02x 0x%02x%02x%02x%02x%02x%02x\n",
212 drive->name, tasklets[3], tasklets[2],
213 tasklets[9], tasklets[8], tasklets[7],
214 tasklets[6], tasklets[5], tasklets[4]);
215 #endif
216 hwif->OUTB(tasklets[1], IDE_FEATURE_REG);
217 hwif->OUTB(tasklets[3], IDE_NSECTOR_REG);
218 hwif->OUTB(tasklets[7], IDE_SECTOR_REG);
219 hwif->OUTB(tasklets[8], IDE_LCYL_REG);
220 hwif->OUTB(tasklets[9], IDE_HCYL_REG);
221
222 hwif->OUTB(tasklets[0], IDE_FEATURE_REG);
223 hwif->OUTB(tasklets[2], IDE_NSECTOR_REG);
224 hwif->OUTB(tasklets[4], IDE_SECTOR_REG);
225 hwif->OUTB(tasklets[5], IDE_LCYL_REG);
226 hwif->OUTB(tasklets[6], IDE_HCYL_REG);
227 hwif->OUTB(0x00|drive->select.all,IDE_SELECT_REG);
228 } else {
229 hwif->OUTB(0x00, IDE_FEATURE_REG);
230 hwif->OUTB(nsectors.b.low, IDE_NSECTOR_REG);
231 hwif->OUTB(block, IDE_SECTOR_REG);
232 hwif->OUTB(block>>=8, IDE_LCYL_REG);
233 hwif->OUTB(block>>=8, IDE_HCYL_REG);
234 hwif->OUTB(((block>>8)&0x0f)|drive->select.all,IDE_SELECT_REG);
235 }
236 } else {
237 unsigned int sect,head,cyl,track;
238 track = (int)block / drive->sect;
239 sect = (int)block % drive->sect + 1;
240 hwif->OUTB(sect, IDE_SECTOR_REG);
241 head = track % drive->head;
242 cyl = track / drive->head;
243
244 pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect);
245
246 hwif->OUTB(0x00, IDE_FEATURE_REG);
247 hwif->OUTB(nsectors.b.low, IDE_NSECTOR_REG);
248 hwif->OUTB(cyl, IDE_LCYL_REG);
249 hwif->OUTB(cyl>>8, IDE_HCYL_REG);
250 hwif->OUTB(head|drive->select.all,IDE_SELECT_REG);
251 }
252
253 if (dma) {
254 if (!hwif->dma_setup(drive)) {
255 if (rq_data_dir(rq)) {
256 command = lba48 ? WIN_WRITEDMA_EXT : WIN_WRITEDMA;
257 if (drive->vdma)
258 command = lba48 ? WIN_WRITE_EXT: WIN_WRITE;
259 } else {
260 command = lba48 ? WIN_READDMA_EXT : WIN_READDMA;
261 if (drive->vdma)
262 command = lba48 ? WIN_READ_EXT: WIN_READ;
263 }
264 hwif->dma_exec_cmd(drive, command);
265 hwif->dma_start(drive);
266 return ide_started;
267 }
268 /* fallback to PIO */
269 ide_init_sg_cmd(drive, rq);
270 }
271
272 if (rq_data_dir(rq) == READ) {
273
274 if (drive->mult_count) {
275 hwif->data_phase = TASKFILE_MULTI_IN;
276 command = lba48 ? WIN_MULTREAD_EXT : WIN_MULTREAD;
277 } else {
278 hwif->data_phase = TASKFILE_IN;
279 command = lba48 ? WIN_READ_EXT : WIN_READ;
280 }
281
282 ide_execute_command(drive, command, &task_in_intr, WAIT_CMD, NULL);
283 return ide_started;
284 } else {
285 if (drive->mult_count) {
286 hwif->data_phase = TASKFILE_MULTI_OUT;
287 command = lba48 ? WIN_MULTWRITE_EXT : WIN_MULTWRITE;
288 } else {
289 hwif->data_phase = TASKFILE_OUT;
290 command = lba48 ? WIN_WRITE_EXT : WIN_WRITE;
291 }
292
293 /* FIXME: ->OUTBSYNC ? */
294 hwif->OUTB(command, IDE_COMMAND_REG);
295
296 return pre_task_out_intr(drive, rq);
297 }
298 }
299
300 /*
301 * 268435455 == 137439 MB or 28bit limit
302 * 320173056 == 163929 MB or 48bit addressing
303 * 1073741822 == 549756 MB or 48bit addressing fake drive
304 */
305
306 static ide_startstop_t ide_do_rw_disk (ide_drive_t *drive, struct request *rq, sector_t block)
307 {
308 ide_hwif_t *hwif = HWIF(drive);
309
310 BUG_ON(drive->blocked);
311
312 if (!blk_fs_request(rq)) {
313 blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command");
314 ide_end_request(drive, 0, 0);
315 return ide_stopped;
316 }
317
318 pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n",
319 drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
320 block, rq->nr_sectors, (unsigned long)rq->buffer);
321
322 if (hwif->rw_disk)
323 hwif->rw_disk(drive, rq);
324
325 return __ide_do_rw_disk(drive, rq, block);
326 }
327
328 /*
329 * Queries for true maximum capacity of the drive.
330 * Returns maximum LBA address (> 0) of the drive, 0 if failed.
331 */
332 static unsigned long idedisk_read_native_max_address(ide_drive_t *drive)
333 {
334 ide_task_t args;
335 unsigned long addr = 0;
336
337 /* Create IDE/ATA command request structure */
338 memset(&args, 0, sizeof(ide_task_t));
339 args.tfRegister[IDE_SELECT_OFFSET] = 0x40;
340 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_READ_NATIVE_MAX;
341 args.command_type = IDE_DRIVE_TASK_NO_DATA;
342 args.handler = &task_no_data_intr;
343 /* submit command request */
344 ide_raw_taskfile(drive, &args, NULL);
345
346 /* if OK, compute maximum address value */
347 if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) {
348 addr = ((args.tfRegister[IDE_SELECT_OFFSET] & 0x0f) << 24)
349 | ((args.tfRegister[ IDE_HCYL_OFFSET] ) << 16)
350 | ((args.tfRegister[ IDE_LCYL_OFFSET] ) << 8)
351 | ((args.tfRegister[IDE_SECTOR_OFFSET] ));
352 addr++; /* since the return value is (maxlba - 1), we add 1 */
353 }
354 return addr;
355 }
356
357 static unsigned long long idedisk_read_native_max_address_ext(ide_drive_t *drive)
358 {
359 ide_task_t args;
360 unsigned long long addr = 0;
361
362 /* Create IDE/ATA command request structure */
363 memset(&args, 0, sizeof(ide_task_t));
364
365 args.tfRegister[IDE_SELECT_OFFSET] = 0x40;
366 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_READ_NATIVE_MAX_EXT;
367 args.command_type = IDE_DRIVE_TASK_NO_DATA;
368 args.handler = &task_no_data_intr;
369 /* submit command request */
370 ide_raw_taskfile(drive, &args, NULL);
371
372 /* if OK, compute maximum address value */
373 if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) {
374 u32 high = (args.hobRegister[IDE_HCYL_OFFSET] << 16) |
375 (args.hobRegister[IDE_LCYL_OFFSET] << 8) |
376 args.hobRegister[IDE_SECTOR_OFFSET];
377 u32 low = ((args.tfRegister[IDE_HCYL_OFFSET])<<16) |
378 ((args.tfRegister[IDE_LCYL_OFFSET])<<8) |
379 (args.tfRegister[IDE_SECTOR_OFFSET]);
380 addr = ((__u64)high << 24) | low;
381 addr++; /* since the return value is (maxlba - 1), we add 1 */
382 }
383 return addr;
384 }
385
386 /*
387 * Sets maximum virtual LBA address of the drive.
388 * Returns new maximum virtual LBA address (> 0) or 0 on failure.
389 */
390 static unsigned long idedisk_set_max_address(ide_drive_t *drive, unsigned long addr_req)
391 {
392 ide_task_t args;
393 unsigned long addr_set = 0;
394
395 addr_req--;
396 /* Create IDE/ATA command request structure */
397 memset(&args, 0, sizeof(ide_task_t));
398 args.tfRegister[IDE_SECTOR_OFFSET] = ((addr_req >> 0) & 0xff);
399 args.tfRegister[IDE_LCYL_OFFSET] = ((addr_req >> 8) & 0xff);
400 args.tfRegister[IDE_HCYL_OFFSET] = ((addr_req >> 16) & 0xff);
401 args.tfRegister[IDE_SELECT_OFFSET] = ((addr_req >> 24) & 0x0f) | 0x40;
402 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SET_MAX;
403 args.command_type = IDE_DRIVE_TASK_NO_DATA;
404 args.handler = &task_no_data_intr;
405 /* submit command request */
406 ide_raw_taskfile(drive, &args, NULL);
407 /* if OK, read new maximum address value */
408 if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) {
409 addr_set = ((args.tfRegister[IDE_SELECT_OFFSET] & 0x0f) << 24)
410 | ((args.tfRegister[ IDE_HCYL_OFFSET] ) << 16)
411 | ((args.tfRegister[ IDE_LCYL_OFFSET] ) << 8)
412 | ((args.tfRegister[IDE_SECTOR_OFFSET] ));
413 addr_set++;
414 }
415 return addr_set;
416 }
417
418 static unsigned long long idedisk_set_max_address_ext(ide_drive_t *drive, unsigned long long addr_req)
419 {
420 ide_task_t args;
421 unsigned long long addr_set = 0;
422
423 addr_req--;
424 /* Create IDE/ATA command request structure */
425 memset(&args, 0, sizeof(ide_task_t));
426 args.tfRegister[IDE_SECTOR_OFFSET] = ((addr_req >> 0) & 0xff);
427 args.tfRegister[IDE_LCYL_OFFSET] = ((addr_req >>= 8) & 0xff);
428 args.tfRegister[IDE_HCYL_OFFSET] = ((addr_req >>= 8) & 0xff);
429 args.tfRegister[IDE_SELECT_OFFSET] = 0x40;
430 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SET_MAX_EXT;
431 args.hobRegister[IDE_SECTOR_OFFSET] = (addr_req >>= 8) & 0xff;
432 args.hobRegister[IDE_LCYL_OFFSET] = (addr_req >>= 8) & 0xff;
433 args.hobRegister[IDE_HCYL_OFFSET] = (addr_req >>= 8) & 0xff;
434 args.hobRegister[IDE_SELECT_OFFSET] = 0x40;
435 args.hobRegister[IDE_CONTROL_OFFSET_HOB]= (drive->ctl|0x80);
436 args.command_type = IDE_DRIVE_TASK_NO_DATA;
437 args.handler = &task_no_data_intr;
438 /* submit command request */
439 ide_raw_taskfile(drive, &args, NULL);
440 /* if OK, compute maximum address value */
441 if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) {
442 u32 high = (args.hobRegister[IDE_HCYL_OFFSET] << 16) |
443 (args.hobRegister[IDE_LCYL_OFFSET] << 8) |
444 args.hobRegister[IDE_SECTOR_OFFSET];
445 u32 low = ((args.tfRegister[IDE_HCYL_OFFSET])<<16) |
446 ((args.tfRegister[IDE_LCYL_OFFSET])<<8) |
447 (args.tfRegister[IDE_SECTOR_OFFSET]);
448 addr_set = ((__u64)high << 24) | low;
449 addr_set++;
450 }
451 return addr_set;
452 }
453
454 static unsigned long long sectors_to_MB(unsigned long long n)
455 {
456 n <<= 9; /* make it bytes */
457 do_div(n, 1000000); /* make it MB */
458 return n;
459 }
460
461 /*
462 * Bits 10 of command_set_1 and cfs_enable_1 must be equal,
463 * so on non-buggy drives we need test only one.
464 * However, we should also check whether these fields are valid.
465 */
466 static inline int idedisk_supports_hpa(const struct hd_driveid *id)
467 {
468 return (id->command_set_1 & 0x0400) && (id->cfs_enable_1 & 0x0400);
469 }
470
471 /*
472 * The same here.
473 */
474 static inline int idedisk_supports_lba48(const struct hd_driveid *id)
475 {
476 return (id->command_set_2 & 0x0400) && (id->cfs_enable_2 & 0x0400)
477 && id->lba_capacity_2;
478 }
479
480 static inline void idedisk_check_hpa(ide_drive_t *drive)
481 {
482 unsigned long long capacity, set_max;
483 int lba48 = idedisk_supports_lba48(drive->id);
484
485 capacity = drive->capacity64;
486 if (lba48)
487 set_max = idedisk_read_native_max_address_ext(drive);
488 else
489 set_max = idedisk_read_native_max_address(drive);
490
491 if (set_max <= capacity)
492 return;
493
494 printk(KERN_INFO "%s: Host Protected Area detected.\n"
495 "\tcurrent capacity is %llu sectors (%llu MB)\n"
496 "\tnative capacity is %llu sectors (%llu MB)\n",
497 drive->name,
498 capacity, sectors_to_MB(capacity),
499 set_max, sectors_to_MB(set_max));
500
501 if (lba48)
502 set_max = idedisk_set_max_address_ext(drive, set_max);
503 else
504 set_max = idedisk_set_max_address(drive, set_max);
505 if (set_max) {
506 drive->capacity64 = set_max;
507 printk(KERN_INFO "%s: Host Protected Area disabled.\n",
508 drive->name);
509 }
510 }
511
512 /*
513 * Compute drive->capacity, the full capacity of the drive
514 * Called with drive->id != NULL.
515 *
516 * To compute capacity, this uses either of
517 *
518 * 1. CHS value set by user (whatever user sets will be trusted)
519 * 2. LBA value from target drive (require new ATA feature)
520 * 3. LBA value from system BIOS (new one is OK, old one may break)
521 * 4. CHS value from system BIOS (traditional style)
522 *
523 * in above order (i.e., if value of higher priority is available,
524 * reset will be ignored).
525 */
526 static void init_idedisk_capacity (ide_drive_t *drive)
527 {
528 struct hd_driveid *id = drive->id;
529 /*
530 * If this drive supports the Host Protected Area feature set,
531 * then we may need to change our opinion about the drive's capacity.
532 */
533 int hpa = idedisk_supports_hpa(id);
534
535 if (idedisk_supports_lba48(id)) {
536 /* drive speaks 48-bit LBA */
537 drive->select.b.lba = 1;
538 drive->capacity64 = id->lba_capacity_2;
539 if (hpa)
540 idedisk_check_hpa(drive);
541 } else if ((id->capability & 2) && lba_capacity_is_ok(id)) {
542 /* drive speaks 28-bit LBA */
543 drive->select.b.lba = 1;
544 drive->capacity64 = id->lba_capacity;
545 if (hpa)
546 idedisk_check_hpa(drive);
547 } else {
548 /* drive speaks boring old 28-bit CHS */
549 drive->capacity64 = drive->cyl * drive->head * drive->sect;
550 }
551 }
552
553 static sector_t idedisk_capacity (ide_drive_t *drive)
554 {
555 return drive->capacity64 - drive->sect0;
556 }
557
558 #ifdef CONFIG_PROC_FS
559
560 static int smart_enable(ide_drive_t *drive)
561 {
562 ide_task_t args;
563
564 memset(&args, 0, sizeof(ide_task_t));
565 args.tfRegister[IDE_FEATURE_OFFSET] = SMART_ENABLE;
566 args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS;
567 args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS;
568 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART;
569 args.command_type = IDE_DRIVE_TASK_NO_DATA;
570 args.handler = &task_no_data_intr;
571 return ide_raw_taskfile(drive, &args, NULL);
572 }
573
574 static int get_smart_values(ide_drive_t *drive, u8 *buf)
575 {
576 ide_task_t args;
577
578 memset(&args, 0, sizeof(ide_task_t));
579 args.tfRegister[IDE_FEATURE_OFFSET] = SMART_READ_VALUES;
580 args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01;
581 args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS;
582 args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS;
583 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART;
584 args.command_type = IDE_DRIVE_TASK_IN;
585 args.data_phase = TASKFILE_IN;
586 args.handler = &task_in_intr;
587 (void) smart_enable(drive);
588 return ide_raw_taskfile(drive, &args, buf);
589 }
590
591 static int get_smart_thresholds(ide_drive_t *drive, u8 *buf)
592 {
593 ide_task_t args;
594 memset(&args, 0, sizeof(ide_task_t));
595 args.tfRegister[IDE_FEATURE_OFFSET] = SMART_READ_THRESHOLDS;
596 args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01;
597 args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS;
598 args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS;
599 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART;
600 args.command_type = IDE_DRIVE_TASK_IN;
601 args.data_phase = TASKFILE_IN;
602 args.handler = &task_in_intr;
603 (void) smart_enable(drive);
604 return ide_raw_taskfile(drive, &args, buf);
605 }
606
607 static int proc_idedisk_read_cache
608 (char *page, char **start, off_t off, int count, int *eof, void *data)
609 {
610 ide_drive_t *drive = (ide_drive_t *) data;
611 char *out = page;
612 int len;
613
614 if (drive->id_read)
615 len = sprintf(out,"%i\n", drive->id->buf_size / 2);
616 else
617 len = sprintf(out,"(none)\n");
618 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
619 }
620
621 static int proc_idedisk_read_capacity
622 (char *page, char **start, off_t off, int count, int *eof, void *data)
623 {
624 ide_drive_t*drive = (ide_drive_t *)data;
625 int len;
626
627 len = sprintf(page,"%llu\n", (long long)idedisk_capacity(drive));
628 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
629 }
630
631 static int proc_idedisk_read_smart_thresholds
632 (char *page, char **start, off_t off, int count, int *eof, void *data)
633 {
634 ide_drive_t *drive = (ide_drive_t *)data;
635 int len = 0, i = 0;
636
637 if (!get_smart_thresholds(drive, page)) {
638 unsigned short *val = (unsigned short *) page;
639 char *out = ((char *)val) + (SECTOR_WORDS * 4);
640 page = out;
641 do {
642 out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n');
643 val += 1;
644 } while (i < (SECTOR_WORDS * 2));
645 len = out - page;
646 }
647 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
648 }
649
650 static int proc_idedisk_read_smart_values
651 (char *page, char **start, off_t off, int count, int *eof, void *data)
652 {
653 ide_drive_t *drive = (ide_drive_t *)data;
654 int len = 0, i = 0;
655
656 if (!get_smart_values(drive, page)) {
657 unsigned short *val = (unsigned short *) page;
658 char *out = ((char *)val) + (SECTOR_WORDS * 4);
659 page = out;
660 do {
661 out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n');
662 val += 1;
663 } while (i < (SECTOR_WORDS * 2));
664 len = out - page;
665 }
666 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
667 }
668
669 static ide_proc_entry_t idedisk_proc[] = {
670 { "cache", S_IFREG|S_IRUGO, proc_idedisk_read_cache, NULL },
671 { "capacity", S_IFREG|S_IRUGO, proc_idedisk_read_capacity, NULL },
672 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
673 { "smart_values", S_IFREG|S_IRUSR, proc_idedisk_read_smart_values, NULL },
674 { "smart_thresholds", S_IFREG|S_IRUSR, proc_idedisk_read_smart_thresholds, NULL },
675 { NULL, 0, NULL, NULL }
676 };
677
678 #else
679
680 #define idedisk_proc NULL
681
682 #endif /* CONFIG_PROC_FS */
683
684 static void idedisk_prepare_flush(request_queue_t *q, struct request *rq)
685 {
686 ide_drive_t *drive = q->queuedata;
687
688 memset(rq->cmd, 0, sizeof(rq->cmd));
689
690 if (ide_id_has_flush_cache_ext(drive->id) &&
691 (drive->capacity64 >= (1UL << 28)))
692 rq->cmd[0] = WIN_FLUSH_CACHE_EXT;
693 else
694 rq->cmd[0] = WIN_FLUSH_CACHE;
695
696
697 rq->flags |= REQ_DRIVE_TASK;
698 rq->buffer = rq->cmd;
699 }
700
701 static int idedisk_issue_flush(request_queue_t *q, struct gendisk *disk,
702 sector_t *error_sector)
703 {
704 ide_drive_t *drive = q->queuedata;
705 struct request *rq;
706 int ret;
707
708 if (!drive->wcache)
709 return 0;
710
711 rq = blk_get_request(q, WRITE, __GFP_WAIT);
712
713 idedisk_prepare_flush(q, rq);
714
715 ret = blk_execute_rq(q, disk, rq, 0);
716
717 /*
718 * if we failed and caller wants error offset, get it
719 */
720 if (ret && error_sector)
721 *error_sector = ide_get_error_location(drive, rq->cmd);
722
723 blk_put_request(rq);
724 return ret;
725 }
726
727 /*
728 * This is tightly woven into the driver->do_special can not touch.
729 * DON'T do it again until a total personality rewrite is committed.
730 */
731 static int set_multcount(ide_drive_t *drive, int arg)
732 {
733 struct request rq;
734
735 if (drive->special.b.set_multmode)
736 return -EBUSY;
737 ide_init_drive_cmd (&rq);
738 rq.flags = REQ_DRIVE_CMD;
739 drive->mult_req = arg;
740 drive->special.b.set_multmode = 1;
741 (void) ide_do_drive_cmd (drive, &rq, ide_wait);
742 return (drive->mult_count == arg) ? 0 : -EIO;
743 }
744
745 static int set_nowerr(ide_drive_t *drive, int arg)
746 {
747 if (ide_spin_wait_hwgroup(drive))
748 return -EBUSY;
749 drive->nowerr = arg;
750 drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
751 spin_unlock_irq(&ide_lock);
752 return 0;
753 }
754
755 static void update_ordered(ide_drive_t *drive)
756 {
757 struct hd_driveid *id = drive->id;
758 unsigned ordered = QUEUE_ORDERED_NONE;
759 prepare_flush_fn *prep_fn = NULL;
760 issue_flush_fn *issue_fn = NULL;
761
762 if (drive->wcache) {
763 unsigned long long capacity;
764 int barrier;
765 /*
766 * We must avoid issuing commands a drive does not
767 * understand or we may crash it. We check flush cache
768 * is supported. We also check we have the LBA48 flush
769 * cache if the drive capacity is too large. By this
770 * time we have trimmed the drive capacity if LBA48 is
771 * not available so we don't need to recheck that.
772 */
773 capacity = idedisk_capacity(drive);
774 barrier = ide_id_has_flush_cache(id) &&
775 (drive->addressing == 0 || capacity <= (1ULL << 28) ||
776 ide_id_has_flush_cache_ext(id));
777
778 printk(KERN_INFO "%s: cache flushes %ssupported\n",
779 drive->name, barrier ? "" : "not");
780
781 if (barrier) {
782 ordered = QUEUE_ORDERED_DRAIN_FLUSH;
783 prep_fn = idedisk_prepare_flush;
784 issue_fn = idedisk_issue_flush;
785 }
786 } else
787 ordered = QUEUE_ORDERED_DRAIN;
788
789 blk_queue_ordered(drive->queue, ordered, prep_fn);
790 blk_queue_issue_flush_fn(drive->queue, issue_fn);
791 }
792
793 static int write_cache(ide_drive_t *drive, int arg)
794 {
795 ide_task_t args;
796 int err = 1;
797
798 if (ide_id_has_flush_cache(drive->id)) {
799 memset(&args, 0, sizeof(ide_task_t));
800 args.tfRegister[IDE_FEATURE_OFFSET] = (arg) ?
801 SETFEATURES_EN_WCACHE : SETFEATURES_DIS_WCACHE;
802 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SETFEATURES;
803 args.command_type = IDE_DRIVE_TASK_NO_DATA;
804 args.handler = &task_no_data_intr;
805 err = ide_raw_taskfile(drive, &args, NULL);
806 if (err == 0)
807 drive->wcache = arg;
808 }
809
810 update_ordered(drive);
811
812 return err;
813 }
814
815 static int do_idedisk_flushcache (ide_drive_t *drive)
816 {
817 ide_task_t args;
818
819 memset(&args, 0, sizeof(ide_task_t));
820 if (ide_id_has_flush_cache_ext(drive->id))
821 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_FLUSH_CACHE_EXT;
822 else
823 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_FLUSH_CACHE;
824 args.command_type = IDE_DRIVE_TASK_NO_DATA;
825 args.handler = &task_no_data_intr;
826 return ide_raw_taskfile(drive, &args, NULL);
827 }
828
829 static int set_acoustic (ide_drive_t *drive, int arg)
830 {
831 ide_task_t args;
832
833 memset(&args, 0, sizeof(ide_task_t));
834 args.tfRegister[IDE_FEATURE_OFFSET] = (arg) ? SETFEATURES_EN_AAM :
835 SETFEATURES_DIS_AAM;
836 args.tfRegister[IDE_NSECTOR_OFFSET] = arg;
837 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SETFEATURES;
838 args.command_type = IDE_DRIVE_TASK_NO_DATA;
839 args.handler = &task_no_data_intr;
840 ide_raw_taskfile(drive, &args, NULL);
841 drive->acoustic = arg;
842 return 0;
843 }
844
845 /*
846 * drive->addressing:
847 * 0: 28-bit
848 * 1: 48-bit
849 * 2: 48-bit capable doing 28-bit
850 */
851 static int set_lba_addressing(ide_drive_t *drive, int arg)
852 {
853 drive->addressing = 0;
854
855 if (HWIF(drive)->no_lba48)
856 return 0;
857
858 if (!idedisk_supports_lba48(drive->id))
859 return -EIO;
860 drive->addressing = arg;
861 return 0;
862 }
863
864 static void idedisk_add_settings(ide_drive_t *drive)
865 {
866 struct hd_driveid *id = drive->id;
867
868 ide_add_setting(drive, "bios_cyl", SETTING_RW, -1, -1, TYPE_INT, 0, 65535, 1, 1, &drive->bios_cyl, NULL);
869 ide_add_setting(drive, "bios_head", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL);
870 ide_add_setting(drive, "bios_sect", SETTING_RW, -1, -1, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL);
871 ide_add_setting(drive, "address", SETTING_RW, HDIO_GET_ADDRESS, HDIO_SET_ADDRESS, TYPE_INTA, 0, 2, 1, 1, &drive->addressing, set_lba_addressing);
872 ide_add_setting(drive, "bswap", SETTING_READ, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->bswap, NULL);
873 ide_add_setting(drive, "multcount", id ? SETTING_RW : SETTING_READ, HDIO_GET_MULTCOUNT, HDIO_SET_MULTCOUNT, TYPE_BYTE, 0, id ? id->max_multsect : 0, 1, 1, &drive->mult_count, set_multcount);
874 ide_add_setting(drive, "nowerr", SETTING_RW, HDIO_GET_NOWERR, HDIO_SET_NOWERR, TYPE_BYTE, 0, 1, 1, 1, &drive->nowerr, set_nowerr);
875 ide_add_setting(drive, "lun", SETTING_RW, -1, -1, TYPE_INT, 0, 7, 1, 1, &drive->lun, NULL);
876 ide_add_setting(drive, "wcache", SETTING_RW, HDIO_GET_WCACHE, HDIO_SET_WCACHE, TYPE_BYTE, 0, 1, 1, 1, &drive->wcache, write_cache);
877 ide_add_setting(drive, "acoustic", SETTING_RW, HDIO_GET_ACOUSTIC, HDIO_SET_ACOUSTIC, TYPE_BYTE, 0, 254, 1, 1, &drive->acoustic, set_acoustic);
878 ide_add_setting(drive, "failures", SETTING_RW, -1, -1, TYPE_INT, 0, 65535, 1, 1, &drive->failures, NULL);
879 ide_add_setting(drive, "max_failures", SETTING_RW, -1, -1, TYPE_INT, 0, 65535, 1, 1, &drive->max_failures, NULL);
880 }
881
882 static void idedisk_setup (ide_drive_t *drive)
883 {
884 struct hd_driveid *id = drive->id;
885 unsigned long long capacity;
886
887 idedisk_add_settings(drive);
888
889 if (drive->id_read == 0)
890 return;
891
892 /*
893 * CompactFlash cards and their brethern look just like hard drives
894 * to us, but they are removable and don't have a doorlock mechanism.
895 */
896 if (drive->removable && !(drive->is_flash)) {
897 /*
898 * Removable disks (eg. SYQUEST); ignore 'WD' drives
899 */
900 if (id->model[0] != 'W' || id->model[1] != 'D') {
901 drive->doorlocking = 1;
902 }
903 }
904
905 (void)set_lba_addressing(drive, 1);
906
907 if (drive->addressing == 1) {
908 ide_hwif_t *hwif = HWIF(drive);
909 int max_s = 2048;
910
911 if (max_s > hwif->rqsize)
912 max_s = hwif->rqsize;
913
914 blk_queue_max_sectors(drive->queue, max_s);
915 }
916
917 printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, drive->queue->max_sectors / 2);
918
919 /* calculate drive capacity, and select LBA if possible */
920 init_idedisk_capacity (drive);
921
922 /* limit drive capacity to 137GB if LBA48 cannot be used */
923 if (drive->addressing == 0 && drive->capacity64 > 1ULL << 28) {
924 printk(KERN_WARNING "%s: cannot use LBA48 - full capacity "
925 "%llu sectors (%llu MB)\n",
926 drive->name, (unsigned long long)drive->capacity64,
927 sectors_to_MB(drive->capacity64));
928 drive->capacity64 = 1ULL << 28;
929 }
930
931 if (drive->hwif->no_lba48_dma && drive->addressing) {
932 if (drive->capacity64 > 1ULL << 28) {
933 printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode will"
934 " be used for accessing sectors > %u\n",
935 drive->name, 1 << 28);
936 } else
937 drive->addressing = 0;
938 }
939
940 /*
941 * if possible, give fdisk access to more of the drive,
942 * by correcting bios_cyls:
943 */
944 capacity = idedisk_capacity (drive);
945 if (!drive->forced_geom) {
946
947 if (idedisk_supports_lba48(drive->id)) {
948 /* compatibility */
949 drive->bios_sect = 63;
950 drive->bios_head = 255;
951 }
952
953 if (drive->bios_sect && drive->bios_head) {
954 unsigned int cap0 = capacity; /* truncate to 32 bits */
955 unsigned int cylsz, cyl;
956
957 if (cap0 != capacity)
958 drive->bios_cyl = 65535;
959 else {
960 cylsz = drive->bios_sect * drive->bios_head;
961 cyl = cap0 / cylsz;
962 if (cyl > 65535)
963 cyl = 65535;
964 if (cyl > drive->bios_cyl)
965 drive->bios_cyl = cyl;
966 }
967 }
968 }
969 printk(KERN_INFO "%s: %llu sectors (%llu MB)",
970 drive->name, capacity, sectors_to_MB(capacity));
971
972 /* Only print cache size when it was specified */
973 if (id->buf_size)
974 printk (" w/%dKiB Cache", id->buf_size/2);
975
976 printk(", CHS=%d/%d/%d",
977 drive->bios_cyl, drive->bios_head, drive->bios_sect);
978 if (drive->using_dma)
979 ide_dma_verbose(drive);
980 printk("\n");
981
982 drive->no_io_32bit = id->dword_io ? 1 : 0;
983
984 /* write cache enabled? */
985 if ((id->csfo & 1) || (id->cfs_enable_1 & (1 << 5)))
986 drive->wcache = 1;
987
988 write_cache(drive, 1);
989 }
990
991 static void ide_cacheflush_p(ide_drive_t *drive)
992 {
993 if (!drive->wcache || !ide_id_has_flush_cache(drive->id))
994 return;
995
996 if (do_idedisk_flushcache(drive))
997 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
998 }
999
1000 static int ide_disk_remove(struct device *dev)
1001 {
1002 ide_drive_t *drive = to_ide_device(dev);
1003 struct ide_disk_obj *idkp = drive->driver_data;
1004 struct gendisk *g = idkp->disk;
1005
1006 ide_unregister_subdriver(drive, idkp->driver);
1007
1008 del_gendisk(g);
1009
1010 ide_cacheflush_p(drive);
1011
1012 ide_disk_put(idkp);
1013
1014 return 0;
1015 }
1016
1017 static void ide_disk_release(struct kref *kref)
1018 {
1019 struct ide_disk_obj *idkp = to_ide_disk(kref);
1020 ide_drive_t *drive = idkp->drive;
1021 struct gendisk *g = idkp->disk;
1022
1023 drive->driver_data = NULL;
1024 drive->devfs_name[0] = '\0';
1025 g->private_data = NULL;
1026 put_disk(g);
1027 kfree(idkp);
1028 }
1029
1030 static int ide_disk_probe(struct device *dev);
1031
1032 static void ide_device_shutdown(struct device *dev)
1033 {
1034 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
1035
1036 #ifdef CONFIG_ALPHA
1037 /* On Alpha, halt(8) doesn't actually turn the machine off,
1038 it puts you into the sort of firmware monitor. Typically,
1039 it's used to boot another kernel image, so it's not much
1040 different from reboot(8). Therefore, we don't need to
1041 spin down the disk in this case, especially since Alpha
1042 firmware doesn't handle disks in standby mode properly.
1043 On the other hand, it's reasonably safe to turn the power
1044 off when the shutdown process reaches the firmware prompt,
1045 as the firmware initialization takes rather long time -
1046 at least 10 seconds, which should be sufficient for
1047 the disk to expire its write cache. */
1048 if (system_state != SYSTEM_POWER_OFF) {
1049 #else
1050 if (system_state == SYSTEM_RESTART) {
1051 #endif
1052 ide_cacheflush_p(drive);
1053 return;
1054 }
1055
1056 printk("Shutdown: %s\n", drive->name);
1057 dev->bus->suspend(dev, PMSG_SUSPEND);
1058 }
1059
1060 static ide_driver_t idedisk_driver = {
1061 .gen_driver = {
1062 .owner = THIS_MODULE,
1063 .name = "ide-disk",
1064 .bus = &ide_bus_type,
1065 .probe = ide_disk_probe,
1066 .remove = ide_disk_remove,
1067 .shutdown = ide_device_shutdown,
1068 },
1069 .version = IDEDISK_VERSION,
1070 .media = ide_disk,
1071 .supports_dsc_overlap = 0,
1072 .do_request = ide_do_rw_disk,
1073 .end_request = ide_end_request,
1074 .error = __ide_error,
1075 .abort = __ide_abort,
1076 .proc = idedisk_proc,
1077 };
1078
1079 static int idedisk_open(struct inode *inode, struct file *filp)
1080 {
1081 struct gendisk *disk = inode->i_bdev->bd_disk;
1082 struct ide_disk_obj *idkp;
1083 ide_drive_t *drive;
1084
1085 if (!(idkp = ide_disk_get(disk)))
1086 return -ENXIO;
1087
1088 drive = idkp->drive;
1089
1090 drive->usage++;
1091 if (drive->removable && drive->usage == 1) {
1092 ide_task_t args;
1093 memset(&args, 0, sizeof(ide_task_t));
1094 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_DOORLOCK;
1095 args.command_type = IDE_DRIVE_TASK_NO_DATA;
1096 args.handler = &task_no_data_intr;
1097 check_disk_change(inode->i_bdev);
1098 /*
1099 * Ignore the return code from door_lock,
1100 * since the open() has already succeeded,
1101 * and the door_lock is irrelevant at this point.
1102 */
1103 if (drive->doorlocking && ide_raw_taskfile(drive, &args, NULL))
1104 drive->doorlocking = 0;
1105 }
1106 return 0;
1107 }
1108
1109 static int idedisk_release(struct inode *inode, struct file *filp)
1110 {
1111 struct gendisk *disk = inode->i_bdev->bd_disk;
1112 struct ide_disk_obj *idkp = ide_disk_g(disk);
1113 ide_drive_t *drive = idkp->drive;
1114
1115 if (drive->usage == 1)
1116 ide_cacheflush_p(drive);
1117 if (drive->removable && drive->usage == 1) {
1118 ide_task_t args;
1119 memset(&args, 0, sizeof(ide_task_t));
1120 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_DOORUNLOCK;
1121 args.command_type = IDE_DRIVE_TASK_NO_DATA;
1122 args.handler = &task_no_data_intr;
1123 if (drive->doorlocking && ide_raw_taskfile(drive, &args, NULL))
1124 drive->doorlocking = 0;
1125 }
1126 drive->usage--;
1127
1128 ide_disk_put(idkp);
1129
1130 return 0;
1131 }
1132
1133 static int idedisk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1134 {
1135 struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk);
1136 ide_drive_t *drive = idkp->drive;
1137
1138 geo->heads = drive->bios_head;
1139 geo->sectors = drive->bios_sect;
1140 geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1141 return 0;
1142 }
1143
1144 static int idedisk_ioctl(struct inode *inode, struct file *file,
1145 unsigned int cmd, unsigned long arg)
1146 {
1147 struct block_device *bdev = inode->i_bdev;
1148 struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk);
1149 return generic_ide_ioctl(idkp->drive, file, bdev, cmd, arg);
1150 }
1151
1152 static int idedisk_media_changed(struct gendisk *disk)
1153 {
1154 struct ide_disk_obj *idkp = ide_disk_g(disk);
1155 ide_drive_t *drive = idkp->drive;
1156
1157 /* do not scan partitions twice if this is a removable device */
1158 if (drive->attach) {
1159 drive->attach = 0;
1160 return 0;
1161 }
1162 /* if removable, always assume it was changed */
1163 return drive->removable;
1164 }
1165
1166 static int idedisk_revalidate_disk(struct gendisk *disk)
1167 {
1168 struct ide_disk_obj *idkp = ide_disk_g(disk);
1169 set_capacity(disk, idedisk_capacity(idkp->drive));
1170 return 0;
1171 }
1172
1173 static struct block_device_operations idedisk_ops = {
1174 .owner = THIS_MODULE,
1175 .open = idedisk_open,
1176 .release = idedisk_release,
1177 .ioctl = idedisk_ioctl,
1178 .getgeo = idedisk_getgeo,
1179 .media_changed = idedisk_media_changed,
1180 .revalidate_disk= idedisk_revalidate_disk
1181 };
1182
1183 MODULE_DESCRIPTION("ATA DISK Driver");
1184
1185 static int ide_disk_probe(struct device *dev)
1186 {
1187 ide_drive_t *drive = to_ide_device(dev);
1188 struct ide_disk_obj *idkp;
1189 struct gendisk *g;
1190
1191 /* strstr("foo", "") is non-NULL */
1192 if (!strstr("ide-disk", drive->driver_req))
1193 goto failed;
1194 if (!drive->present)
1195 goto failed;
1196 if (drive->media != ide_disk)
1197 goto failed;
1198
1199 idkp = kzalloc(sizeof(*idkp), GFP_KERNEL);
1200 if (!idkp)
1201 goto failed;
1202
1203 g = alloc_disk_node(1 << PARTN_BITS,
1204 hwif_to_node(drive->hwif));
1205 if (!g)
1206 goto out_free_idkp;
1207
1208 ide_init_disk(g, drive);
1209
1210 ide_register_subdriver(drive, &idedisk_driver);
1211
1212 kref_init(&idkp->kref);
1213
1214 idkp->drive = drive;
1215 idkp->driver = &idedisk_driver;
1216 idkp->disk = g;
1217
1218 g->private_data = &idkp->driver;
1219
1220 drive->driver_data = idkp;
1221
1222 idedisk_setup(drive);
1223 if ((!drive->head || drive->head > 16) && !drive->select.b.lba) {
1224 printk(KERN_ERR "%s: INVALID GEOMETRY: %d PHYSICAL HEADS?\n",
1225 drive->name, drive->head);
1226 drive->attach = 0;
1227 } else
1228 drive->attach = 1;
1229
1230 g->minors = 1 << PARTN_BITS;
1231 strcpy(g->devfs_name, drive->devfs_name);
1232 g->driverfs_dev = &drive->gendev;
1233 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1234 set_capacity(g, idedisk_capacity(drive));
1235 g->fops = &idedisk_ops;
1236 add_disk(g);
1237 return 0;
1238
1239 out_free_idkp:
1240 kfree(idkp);
1241 failed:
1242 return -ENODEV;
1243 }
1244
1245 static void __exit idedisk_exit (void)
1246 {
1247 driver_unregister(&idedisk_driver.gen_driver);
1248 }
1249
1250 static int __init idedisk_init(void)
1251 {
1252 return driver_register(&idedisk_driver.gen_driver);
1253 }
1254
1255 MODULE_ALIAS("ide:*m-disk*");
1256 module_init(idedisk_init);
1257 module_exit(idedisk_exit);
1258 MODULE_LICENSE("GPL");
Linus' kernel tree