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1da177e4 LT |
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. | |
1da177e4 LT |
16 | */ |
17 | ||
18 | #define IDEDISK_VERSION "1.18" | |
19 | ||
1da177e4 LT |
20 | //#define DEBUG |
21 | ||
1da177e4 LT |
22 | #include <linux/module.h> |
23 | #include <linux/types.h> | |
24 | #include <linux/string.h> | |
25 | #include <linux/kernel.h> | |
26 | #include <linux/timer.h> | |
27 | #include <linux/mm.h> | |
28 | #include <linux/interrupt.h> | |
29 | #include <linux/major.h> | |
30 | #include <linux/errno.h> | |
31 | #include <linux/genhd.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/delay.h> | |
cf8b8975 | 34 | #include <linux/mutex.h> |
2bfb646c | 35 | #include <linux/leds.h> |
1da177e4 LT |
36 | |
37 | #define _IDE_DISK | |
38 | ||
39 | #include <linux/ide.h> | |
40 | ||
41 | #include <asm/byteorder.h> | |
42 | #include <asm/irq.h> | |
43 | #include <asm/uaccess.h> | |
44 | #include <asm/io.h> | |
45 | #include <asm/div64.h> | |
46 | ||
47 | struct ide_disk_obj { | |
48 | ide_drive_t *drive; | |
49 | ide_driver_t *driver; | |
50 | struct gendisk *disk; | |
51 | struct kref kref; | |
c94964a4 | 52 | unsigned int openers; /* protected by BKL for now */ |
1da177e4 LT |
53 | }; |
54 | ||
cf8b8975 | 55 | static DEFINE_MUTEX(idedisk_ref_mutex); |
1da177e4 LT |
56 | |
57 | #define to_ide_disk(obj) container_of(obj, struct ide_disk_obj, kref) | |
58 | ||
59 | #define ide_disk_g(disk) \ | |
60 | container_of((disk)->private_data, struct ide_disk_obj, driver) | |
61 | ||
62 | static struct ide_disk_obj *ide_disk_get(struct gendisk *disk) | |
63 | { | |
64 | struct ide_disk_obj *idkp = NULL; | |
65 | ||
cf8b8975 | 66 | mutex_lock(&idedisk_ref_mutex); |
1da177e4 LT |
67 | idkp = ide_disk_g(disk); |
68 | if (idkp) | |
69 | kref_get(&idkp->kref); | |
cf8b8975 | 70 | mutex_unlock(&idedisk_ref_mutex); |
1da177e4 LT |
71 | return idkp; |
72 | } | |
73 | ||
74 | static void ide_disk_release(struct kref *); | |
75 | ||
76 | static void ide_disk_put(struct ide_disk_obj *idkp) | |
77 | { | |
cf8b8975 | 78 | mutex_lock(&idedisk_ref_mutex); |
1da177e4 | 79 | kref_put(&idkp->kref, ide_disk_release); |
cf8b8975 | 80 | mutex_unlock(&idedisk_ref_mutex); |
1da177e4 LT |
81 | } |
82 | ||
83 | /* | |
84 | * lba_capacity_is_ok() performs a sanity check on the claimed "lba_capacity" | |
85 | * value for this drive (from its reported identification information). | |
86 | * | |
87 | * Returns: 1 if lba_capacity looks sensible | |
88 | * 0 otherwise | |
89 | * | |
90 | * It is called only once for each drive. | |
91 | */ | |
92 | static int lba_capacity_is_ok (struct hd_driveid *id) | |
93 | { | |
94 | unsigned long lba_sects, chs_sects, head, tail; | |
95 | ||
6efd9360 AC |
96 | /* No non-LBA info .. so valid! */ |
97 | if (id->cyls == 0) | |
98 | return 1; | |
99 | ||
1da177e4 LT |
100 | /* |
101 | * The ATA spec tells large drives to return | |
102 | * C/H/S = 16383/16/63 independent of their size. | |
103 | * Some drives can be jumpered to use 15 heads instead of 16. | |
104 | * Some drives can be jumpered to use 4092 cyls instead of 16383. | |
105 | */ | |
106 | if ((id->cyls == 16383 | |
107 | || (id->cyls == 4092 && id->cur_cyls == 16383)) && | |
108 | id->sectors == 63 && | |
109 | (id->heads == 15 || id->heads == 16) && | |
110 | (id->lba_capacity >= 16383*63*id->heads)) | |
111 | return 1; | |
112 | ||
113 | lba_sects = id->lba_capacity; | |
114 | chs_sects = id->cyls * id->heads * id->sectors; | |
115 | ||
116 | /* perform a rough sanity check on lba_sects: within 10% is OK */ | |
117 | if ((lba_sects - chs_sects) < chs_sects/10) | |
118 | return 1; | |
119 | ||
120 | /* some drives have the word order reversed */ | |
121 | head = ((lba_sects >> 16) & 0xffff); | |
122 | tail = (lba_sects & 0xffff); | |
123 | lba_sects = (head | (tail << 16)); | |
124 | if ((lba_sects - chs_sects) < chs_sects/10) { | |
125 | id->lba_capacity = lba_sects; | |
126 | return 1; /* lba_capacity is (now) good */ | |
127 | } | |
128 | ||
129 | return 0; /* lba_capacity value may be bad */ | |
130 | } | |
131 | ||
ba76ae38 BZ |
132 | static const u8 ide_rw_cmds[] = { |
133 | WIN_MULTREAD, | |
134 | WIN_MULTWRITE, | |
135 | WIN_MULTREAD_EXT, | |
136 | WIN_MULTWRITE_EXT, | |
137 | WIN_READ, | |
138 | WIN_WRITE, | |
139 | WIN_READ_EXT, | |
140 | WIN_WRITE_EXT, | |
141 | WIN_READDMA, | |
142 | WIN_WRITEDMA, | |
143 | WIN_READDMA_EXT, | |
144 | WIN_WRITEDMA_EXT, | |
145 | }; | |
146 | ||
147 | static const u8 ide_data_phases[] = { | |
148 | TASKFILE_MULTI_IN, | |
149 | TASKFILE_MULTI_OUT, | |
150 | TASKFILE_IN, | |
151 | TASKFILE_OUT, | |
152 | TASKFILE_IN_DMA, | |
153 | TASKFILE_OUT_DMA, | |
154 | }; | |
155 | ||
156 | static void ide_tf_set_cmd(ide_drive_t *drive, ide_task_t *task, u8 dma) | |
157 | { | |
158 | u8 index, lba48, write; | |
159 | ||
160 | lba48 = (task->tf_flags & IDE_TFLAG_LBA48) ? 2 : 0; | |
161 | write = (task->tf_flags & IDE_TFLAG_WRITE) ? 1 : 0; | |
162 | ||
163 | if (dma) | |
164 | index = drive->vdma ? 4 : 8; | |
165 | else | |
166 | index = drive->mult_count ? 0 : 4; | |
167 | ||
168 | task->tf.command = ide_rw_cmds[index + lba48 + write]; | |
169 | ||
170 | if (dma) | |
171 | index = 8; /* fixup index */ | |
172 | ||
173 | task->data_phase = ide_data_phases[index / 2 + write]; | |
174 | } | |
175 | ||
1da177e4 LT |
176 | /* |
177 | * __ide_do_rw_disk() issues READ and WRITE commands to a disk, | |
178 | * using LBA if supported, or CHS otherwise, to address sectors. | |
179 | */ | |
180 | static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq, sector_t block) | |
181 | { | |
182 | ide_hwif_t *hwif = HWIF(drive); | |
183 | unsigned int dma = drive->using_dma; | |
790d1239 | 184 | u16 nsectors = (u16)rq->nr_sectors; |
1da177e4 | 185 | u8 lba48 = (drive->addressing == 1) ? 1 : 0; |
9e42237f BZ |
186 | ide_task_t task; |
187 | struct ide_taskfile *tf = &task.tf; | |
f6e29e35 | 188 | ide_startstop_t rc; |
1da177e4 | 189 | |
238e4f14 | 190 | if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) { |
1da177e4 LT |
191 | if (block + rq->nr_sectors > 1ULL << 28) |
192 | dma = 0; | |
193 | else | |
194 | lba48 = 0; | |
195 | } | |
196 | ||
197 | if (!dma) { | |
198 | ide_init_sg_cmd(drive, rq); | |
199 | ide_map_sg(drive, rq); | |
200 | } | |
201 | ||
9e42237f BZ |
202 | memset(&task, 0, sizeof(task)); |
203 | task.tf_flags = IDE_TFLAG_NO_SELECT_MASK; /* FIXME? */ | |
807e35d6 | 204 | task.tf_flags |= (IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE); |
2bd06b23 | 205 | |
1da177e4 LT |
206 | if (drive->select.b.lba) { |
207 | if (lba48) { | |
c2f8311d MR |
208 | pr_debug("%s: LBA=0x%012llx\n", drive->name, |
209 | (unsigned long long)block); | |
1da177e4 | 210 | |
790d1239 | 211 | tf->hob_nsect = (nsectors >> 8) & 0xff; |
2bd06b23 BZ |
212 | tf->hob_lbal = (u8)(block >> 24); |
213 | if (sizeof(block) != 4) { | |
214 | tf->hob_lbam = (u8)((u64)block >> 32); | |
215 | tf->hob_lbah = (u8)((u64)block >> 40); | |
1da177e4 | 216 | } |
2bd06b23 | 217 | |
790d1239 | 218 | tf->nsect = nsectors & 0xff; |
2bd06b23 BZ |
219 | tf->lbal = (u8) block; |
220 | tf->lbam = (u8)(block >> 8); | |
221 | tf->lbah = (u8)(block >> 16); | |
1da177e4 LT |
222 | #ifdef DEBUG |
223 | printk("%s: 0x%02x%02x 0x%02x%02x%02x%02x%02x%02x\n", | |
2bd06b23 BZ |
224 | drive->name, tf->hob_nsect, tf->nsect, |
225 | tf->hob_lbah, tf->hob_lbam, tf->hob_lbal, | |
226 | tf->lbah, tf->lbam, tf->lbal); | |
1da177e4 | 227 | #endif |
74095a91 | 228 | task.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_OUT_HOB); |
1da177e4 | 229 | } else { |
790d1239 | 230 | tf->nsect = nsectors & 0xff; |
2bd06b23 BZ |
231 | tf->lbal = block; |
232 | tf->lbam = block >>= 8; | |
233 | tf->lbah = block >>= 8; | |
234 | tf->device = (block >> 8) & 0xf; | |
1da177e4 LT |
235 | } |
236 | } else { | |
237 | unsigned int sect,head,cyl,track; | |
238 | track = (int)block / drive->sect; | |
239 | sect = (int)block % drive->sect + 1; | |
1da177e4 LT |
240 | head = track % drive->head; |
241 | cyl = track / drive->head; | |
242 | ||
243 | pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect); | |
244 | ||
790d1239 | 245 | tf->nsect = nsectors & 0xff; |
2bd06b23 BZ |
246 | tf->lbal = sect; |
247 | tf->lbam = cyl; | |
248 | tf->lbah = cyl >> 8; | |
249 | tf->device = head; | |
1da177e4 LT |
250 | } |
251 | ||
ba76ae38 BZ |
252 | if (rq_data_dir(rq)) |
253 | task.tf_flags |= IDE_TFLAG_WRITE; | |
254 | ||
255 | ide_tf_set_cmd(drive, &task, dma); | |
f6e29e35 BZ |
256 | if (!dma) |
257 | hwif->data_phase = task.data_phase; | |
258 | task.rq = rq; | |
ba76ae38 | 259 | |
f6e29e35 | 260 | rc = do_rw_taskfile(drive, &task); |
2bd06b23 | 261 | |
f6e29e35 | 262 | if (rc == ide_stopped && dma) { |
1da177e4 | 263 | /* fallback to PIO */ |
f6e29e35 | 264 | task.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK; |
ba76ae38 | 265 | ide_tf_set_cmd(drive, &task, 0); |
f6e29e35 | 266 | hwif->data_phase = task.data_phase; |
1da177e4 | 267 | ide_init_sg_cmd(drive, rq); |
f6e29e35 | 268 | rc = do_rw_taskfile(drive, &task); |
1da177e4 LT |
269 | } |
270 | ||
f6e29e35 | 271 | return rc; |
1da177e4 LT |
272 | } |
273 | ||
274 | /* | |
275 | * 268435455 == 137439 MB or 28bit limit | |
276 | * 320173056 == 163929 MB or 48bit addressing | |
277 | * 1073741822 == 549756 MB or 48bit addressing fake drive | |
278 | */ | |
279 | ||
280 | static ide_startstop_t ide_do_rw_disk (ide_drive_t *drive, struct request *rq, sector_t block) | |
281 | { | |
282 | ide_hwif_t *hwif = HWIF(drive); | |
283 | ||
284 | BUG_ON(drive->blocked); | |
285 | ||
286 | if (!blk_fs_request(rq)) { | |
287 | blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command"); | |
288 | ide_end_request(drive, 0, 0); | |
289 | return ide_stopped; | |
290 | } | |
291 | ||
2bfb646c RP |
292 | ledtrig_ide_activity(); |
293 | ||
1da177e4 LT |
294 | pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n", |
295 | drive->name, rq_data_dir(rq) == READ ? "read" : "writ", | |
c2f8311d MR |
296 | (unsigned long long)block, rq->nr_sectors, |
297 | (unsigned long)rq->buffer); | |
1da177e4 LT |
298 | |
299 | if (hwif->rw_disk) | |
300 | hwif->rw_disk(drive, rq); | |
301 | ||
302 | return __ide_do_rw_disk(drive, rq, block); | |
303 | } | |
304 | ||
305 | /* | |
306 | * Queries for true maximum capacity of the drive. | |
307 | * Returns maximum LBA address (> 0) of the drive, 0 if failed. | |
308 | */ | |
7a3b7512 | 309 | static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48) |
1da177e4 LT |
310 | { |
311 | ide_task_t args; | |
650d841d | 312 | struct ide_taskfile *tf = &args.tf; |
7a3b7512 | 313 | u64 addr = 0; |
1da177e4 LT |
314 | |
315 | /* Create IDE/ATA command request structure */ | |
316 | memset(&args, 0, sizeof(ide_task_t)); | |
7a3b7512 BZ |
317 | if (lba48) |
318 | tf->command = WIN_READ_NATIVE_MAX_EXT; | |
319 | else | |
320 | tf->command = WIN_READ_NATIVE_MAX; | |
650d841d | 321 | tf->device = ATA_LBA; |
a3bbb9d8 BZ |
322 | args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE; |
323 | if (lba48) | |
324 | args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_OUT_HOB); | |
1da177e4 | 325 | /* submit command request */ |
9a3c49be | 326 | ide_no_data_taskfile(drive, &args); |
1da177e4 | 327 | |
1da177e4 | 328 | /* if OK, compute maximum address value */ |
650d841d BZ |
329 | if ((tf->status & 0x01) == 0) { |
330 | u32 high, low; | |
331 | ||
7a3b7512 BZ |
332 | if (lba48) |
333 | high = (tf->hob_lbah << 16) | (tf->hob_lbam << 8) | | |
334 | tf->hob_lbal; | |
335 | else | |
336 | high = tf->device & 0xf; | |
650d841d | 337 | low = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal; |
1da177e4 LT |
338 | addr = ((__u64)high << 24) | low; |
339 | addr++; /* since the return value is (maxlba - 1), we add 1 */ | |
340 | } | |
341 | return addr; | |
342 | } | |
343 | ||
344 | /* | |
345 | * Sets maximum virtual LBA address of the drive. | |
346 | * Returns new maximum virtual LBA address (> 0) or 0 on failure. | |
347 | */ | |
7a3b7512 | 348 | static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48) |
1da177e4 LT |
349 | { |
350 | ide_task_t args; | |
650d841d | 351 | struct ide_taskfile *tf = &args.tf; |
7a3b7512 | 352 | u64 addr_set = 0; |
1da177e4 LT |
353 | |
354 | addr_req--; | |
355 | /* Create IDE/ATA command request structure */ | |
356 | memset(&args, 0, sizeof(ide_task_t)); | |
650d841d BZ |
357 | tf->lbal = (addr_req >> 0) & 0xff; |
358 | tf->lbam = (addr_req >>= 8) & 0xff; | |
359 | tf->lbah = (addr_req >>= 8) & 0xff; | |
7a3b7512 BZ |
360 | if (lba48) { |
361 | tf->hob_lbal = (addr_req >>= 8) & 0xff; | |
362 | tf->hob_lbam = (addr_req >>= 8) & 0xff; | |
363 | tf->hob_lbah = (addr_req >>= 8) & 0xff; | |
364 | tf->command = WIN_SET_MAX_EXT; | |
365 | } else { | |
366 | tf->device = (addr_req >>= 8) & 0x0f; | |
367 | tf->command = WIN_SET_MAX; | |
368 | } | |
369 | tf->device |= ATA_LBA; | |
a3bbb9d8 BZ |
370 | args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE; |
371 | if (lba48) | |
372 | args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_OUT_HOB); | |
1da177e4 | 373 | /* submit command request */ |
9a3c49be | 374 | ide_no_data_taskfile(drive, &args); |
1da177e4 | 375 | /* if OK, compute maximum address value */ |
650d841d BZ |
376 | if ((tf->status & 0x01) == 0) { |
377 | u32 high, low; | |
378 | ||
7a3b7512 BZ |
379 | if (lba48) |
380 | high = (tf->hob_lbah << 16) | (tf->hob_lbam << 8) | | |
381 | tf->hob_lbal; | |
382 | else | |
383 | high = tf->device & 0xf; | |
650d841d | 384 | low = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal; |
1da177e4 LT |
385 | addr_set = ((__u64)high << 24) | low; |
386 | addr_set++; | |
387 | } | |
388 | return addr_set; | |
389 | } | |
390 | ||
391 | static unsigned long long sectors_to_MB(unsigned long long n) | |
392 | { | |
393 | n <<= 9; /* make it bytes */ | |
394 | do_div(n, 1000000); /* make it MB */ | |
395 | return n; | |
396 | } | |
397 | ||
398 | /* | |
399 | * Bits 10 of command_set_1 and cfs_enable_1 must be equal, | |
400 | * so on non-buggy drives we need test only one. | |
401 | * However, we should also check whether these fields are valid. | |
402 | */ | |
403 | static inline int idedisk_supports_hpa(const struct hd_driveid *id) | |
404 | { | |
405 | return (id->command_set_1 & 0x0400) && (id->cfs_enable_1 & 0x0400); | |
406 | } | |
407 | ||
408 | /* | |
409 | * The same here. | |
410 | */ | |
411 | static inline int idedisk_supports_lba48(const struct hd_driveid *id) | |
412 | { | |
413 | return (id->command_set_2 & 0x0400) && (id->cfs_enable_2 & 0x0400) | |
414 | && id->lba_capacity_2; | |
415 | } | |
416 | ||
b0244a00 BZ |
417 | /* |
418 | * Some disks report total number of sectors instead of | |
419 | * maximum sector address. We list them here. | |
420 | */ | |
421 | static const struct drive_list_entry hpa_list[] = { | |
422 | { "ST340823A", NULL }, | |
7062cdc5 | 423 | { "ST320413A", NULL }, |
b0244a00 BZ |
424 | { NULL, NULL } |
425 | }; | |
426 | ||
858119e1 | 427 | static void idedisk_check_hpa(ide_drive_t *drive) |
1da177e4 LT |
428 | { |
429 | unsigned long long capacity, set_max; | |
430 | int lba48 = idedisk_supports_lba48(drive->id); | |
431 | ||
432 | capacity = drive->capacity64; | |
7a3b7512 BZ |
433 | |
434 | set_max = idedisk_read_native_max_address(drive, lba48); | |
1da177e4 | 435 | |
b0244a00 BZ |
436 | if (ide_in_drive_list(drive->id, hpa_list)) { |
437 | /* | |
438 | * Since we are inclusive wrt to firmware revisions do this | |
439 | * extra check and apply the workaround only when needed. | |
440 | */ | |
441 | if (set_max == capacity + 1) | |
442 | set_max--; | |
443 | } | |
444 | ||
1da177e4 LT |
445 | if (set_max <= capacity) |
446 | return; | |
447 | ||
448 | printk(KERN_INFO "%s: Host Protected Area detected.\n" | |
449 | "\tcurrent capacity is %llu sectors (%llu MB)\n" | |
450 | "\tnative capacity is %llu sectors (%llu MB)\n", | |
451 | drive->name, | |
452 | capacity, sectors_to_MB(capacity), | |
453 | set_max, sectors_to_MB(set_max)); | |
454 | ||
7a3b7512 BZ |
455 | set_max = idedisk_set_max_address(drive, set_max, lba48); |
456 | ||
1da177e4 LT |
457 | if (set_max) { |
458 | drive->capacity64 = set_max; | |
459 | printk(KERN_INFO "%s: Host Protected Area disabled.\n", | |
460 | drive->name); | |
461 | } | |
462 | } | |
463 | ||
464 | /* | |
465 | * Compute drive->capacity, the full capacity of the drive | |
466 | * Called with drive->id != NULL. | |
467 | * | |
468 | * To compute capacity, this uses either of | |
469 | * | |
470 | * 1. CHS value set by user (whatever user sets will be trusted) | |
471 | * 2. LBA value from target drive (require new ATA feature) | |
472 | * 3. LBA value from system BIOS (new one is OK, old one may break) | |
473 | * 4. CHS value from system BIOS (traditional style) | |
474 | * | |
475 | * in above order (i.e., if value of higher priority is available, | |
476 | * reset will be ignored). | |
477 | */ | |
478 | static void init_idedisk_capacity (ide_drive_t *drive) | |
479 | { | |
480 | struct hd_driveid *id = drive->id; | |
481 | /* | |
482 | * If this drive supports the Host Protected Area feature set, | |
483 | * then we may need to change our opinion about the drive's capacity. | |
484 | */ | |
485 | int hpa = idedisk_supports_hpa(id); | |
486 | ||
487 | if (idedisk_supports_lba48(id)) { | |
488 | /* drive speaks 48-bit LBA */ | |
489 | drive->select.b.lba = 1; | |
490 | drive->capacity64 = id->lba_capacity_2; | |
491 | if (hpa) | |
492 | idedisk_check_hpa(drive); | |
493 | } else if ((id->capability & 2) && lba_capacity_is_ok(id)) { | |
494 | /* drive speaks 28-bit LBA */ | |
495 | drive->select.b.lba = 1; | |
496 | drive->capacity64 = id->lba_capacity; | |
497 | if (hpa) | |
498 | idedisk_check_hpa(drive); | |
499 | } else { | |
500 | /* drive speaks boring old 28-bit CHS */ | |
501 | drive->capacity64 = drive->cyl * drive->head * drive->sect; | |
502 | } | |
503 | } | |
504 | ||
505 | static sector_t idedisk_capacity (ide_drive_t *drive) | |
506 | { | |
507 | return drive->capacity64 - drive->sect0; | |
508 | } | |
509 | ||
ecfd80e4 | 510 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 LT |
511 | static int smart_enable(ide_drive_t *drive) |
512 | { | |
513 | ide_task_t args; | |
650d841d | 514 | struct ide_taskfile *tf = &args.tf; |
1da177e4 LT |
515 | |
516 | memset(&args, 0, sizeof(ide_task_t)); | |
650d841d BZ |
517 | tf->feature = SMART_ENABLE; |
518 | tf->lbam = SMART_LCYL_PASS; | |
519 | tf->lbah = SMART_HCYL_PASS; | |
520 | tf->command = WIN_SMART; | |
a3bbb9d8 | 521 | args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE; |
9a3c49be | 522 | return ide_no_data_taskfile(drive, &args); |
1da177e4 LT |
523 | } |
524 | ||
43e7c0c4 | 525 | static int get_smart_data(ide_drive_t *drive, u8 *buf, u8 sub_cmd) |
1da177e4 LT |
526 | { |
527 | ide_task_t args; | |
650d841d | 528 | struct ide_taskfile *tf = &args.tf; |
1da177e4 LT |
529 | |
530 | memset(&args, 0, sizeof(ide_task_t)); | |
650d841d BZ |
531 | tf->feature = sub_cmd; |
532 | tf->nsect = 0x01; | |
533 | tf->lbam = SMART_LCYL_PASS; | |
534 | tf->lbah = SMART_HCYL_PASS; | |
535 | tf->command = WIN_SMART; | |
ac026ff2 BZ |
536 | args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE; |
537 | args.data_phase = TASKFILE_IN; | |
1da177e4 | 538 | (void) smart_enable(drive); |
ac026ff2 | 539 | return ide_raw_taskfile(drive, &args, buf, 1); |
1da177e4 LT |
540 | } |
541 | ||
542 | static int proc_idedisk_read_cache | |
543 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
544 | { | |
545 | ide_drive_t *drive = (ide_drive_t *) data; | |
546 | char *out = page; | |
547 | int len; | |
548 | ||
549 | if (drive->id_read) | |
550 | len = sprintf(out,"%i\n", drive->id->buf_size / 2); | |
551 | else | |
552 | len = sprintf(out,"(none)\n"); | |
553 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
554 | } | |
555 | ||
556 | static int proc_idedisk_read_capacity | |
557 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
558 | { | |
559 | ide_drive_t*drive = (ide_drive_t *)data; | |
560 | int len; | |
561 | ||
562 | len = sprintf(page,"%llu\n", (long long)idedisk_capacity(drive)); | |
563 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
564 | } | |
565 | ||
566 | static int proc_idedisk_read_smart_thresholds | |
567 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
568 | { | |
569 | ide_drive_t *drive = (ide_drive_t *)data; | |
570 | int len = 0, i = 0; | |
571 | ||
43e7c0c4 | 572 | if (get_smart_data(drive, page, SMART_READ_THRESHOLDS) == 0) { |
1da177e4 LT |
573 | unsigned short *val = (unsigned short *) page; |
574 | char *out = ((char *)val) + (SECTOR_WORDS * 4); | |
575 | page = out; | |
576 | do { | |
577 | out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n'); | |
578 | val += 1; | |
579 | } while (i < (SECTOR_WORDS * 2)); | |
580 | len = out - page; | |
581 | } | |
582 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
583 | } | |
584 | ||
585 | static int proc_idedisk_read_smart_values | |
586 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
587 | { | |
588 | ide_drive_t *drive = (ide_drive_t *)data; | |
589 | int len = 0, i = 0; | |
590 | ||
43e7c0c4 | 591 | if (get_smart_data(drive, page, SMART_READ_VALUES) == 0) { |
1da177e4 LT |
592 | unsigned short *val = (unsigned short *) page; |
593 | char *out = ((char *)val) + (SECTOR_WORDS * 4); | |
594 | page = out; | |
595 | do { | |
596 | out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n'); | |
597 | val += 1; | |
598 | } while (i < (SECTOR_WORDS * 2)); | |
599 | len = out - page; | |
600 | } | |
601 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
602 | } | |
603 | ||
604 | static ide_proc_entry_t idedisk_proc[] = { | |
605 | { "cache", S_IFREG|S_IRUGO, proc_idedisk_read_cache, NULL }, | |
606 | { "capacity", S_IFREG|S_IRUGO, proc_idedisk_read_capacity, NULL }, | |
607 | { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, | |
608 | { "smart_values", S_IFREG|S_IRUSR, proc_idedisk_read_smart_values, NULL }, | |
609 | { "smart_thresholds", S_IFREG|S_IRUSR, proc_idedisk_read_smart_thresholds, NULL }, | |
610 | { NULL, 0, NULL, NULL } | |
611 | }; | |
ecfd80e4 | 612 | #endif /* CONFIG_IDE_PROC_FS */ |
1da177e4 | 613 | |
165125e1 | 614 | static void idedisk_prepare_flush(struct request_queue *q, struct request *rq) |
1da177e4 LT |
615 | { |
616 | ide_drive_t *drive = q->queuedata; | |
813a0eb2 | 617 | ide_task_t task; |
1da177e4 | 618 | |
813a0eb2 | 619 | memset(&task, 0, sizeof(task)); |
1da177e4 LT |
620 | if (ide_id_has_flush_cache_ext(drive->id) && |
621 | (drive->capacity64 >= (1UL << 28))) | |
813a0eb2 | 622 | task.tf.command = WIN_FLUSH_CACHE_EXT; |
1da177e4 | 623 | else |
813a0eb2 | 624 | task.tf.command = WIN_FLUSH_CACHE; |
ac026ff2 BZ |
625 | task.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE; |
626 | task.data_phase = TASKFILE_NO_DATA; | |
1da177e4 | 627 | |
813a0eb2 | 628 | rq->cmd_type = REQ_TYPE_ATA_TASKFILE; |
4aff5e23 | 629 | rq->cmd_flags |= REQ_SOFTBARRIER; |
813a0eb2 | 630 | rq->special = &task; |
1da177e4 LT |
631 | } |
632 | ||
1da177e4 LT |
633 | /* |
634 | * This is tightly woven into the driver->do_special can not touch. | |
635 | * DON'T do it again until a total personality rewrite is committed. | |
636 | */ | |
637 | static int set_multcount(ide_drive_t *drive, int arg) | |
638 | { | |
639 | struct request rq; | |
640 | ||
1497943e BZ |
641 | if (arg < 0 || arg > drive->id->max_multsect) |
642 | return -EINVAL; | |
643 | ||
1da177e4 LT |
644 | if (drive->special.b.set_multmode) |
645 | return -EBUSY; | |
646 | ide_init_drive_cmd (&rq); | |
4aff5e23 | 647 | rq.cmd_type = REQ_TYPE_ATA_CMD; |
1da177e4 LT |
648 | drive->mult_req = arg; |
649 | drive->special.b.set_multmode = 1; | |
650 | (void) ide_do_drive_cmd (drive, &rq, ide_wait); | |
651 | return (drive->mult_count == arg) ? 0 : -EIO; | |
652 | } | |
653 | ||
654 | static int set_nowerr(ide_drive_t *drive, int arg) | |
655 | { | |
1497943e BZ |
656 | if (arg < 0 || arg > 1) |
657 | return -EINVAL; | |
658 | ||
1da177e4 LT |
659 | if (ide_spin_wait_hwgroup(drive)) |
660 | return -EBUSY; | |
661 | drive->nowerr = arg; | |
662 | drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT; | |
663 | spin_unlock_irq(&ide_lock); | |
664 | return 0; | |
665 | } | |
666 | ||
3e087b57 TH |
667 | static void update_ordered(ide_drive_t *drive) |
668 | { | |
669 | struct hd_driveid *id = drive->id; | |
670 | unsigned ordered = QUEUE_ORDERED_NONE; | |
671 | prepare_flush_fn *prep_fn = NULL; | |
3e087b57 TH |
672 | |
673 | if (drive->wcache) { | |
674 | unsigned long long capacity; | |
675 | int barrier; | |
676 | /* | |
677 | * We must avoid issuing commands a drive does not | |
678 | * understand or we may crash it. We check flush cache | |
679 | * is supported. We also check we have the LBA48 flush | |
680 | * cache if the drive capacity is too large. By this | |
681 | * time we have trimmed the drive capacity if LBA48 is | |
682 | * not available so we don't need to recheck that. | |
683 | */ | |
684 | capacity = idedisk_capacity(drive); | |
36193484 | 685 | barrier = ide_id_has_flush_cache(id) && !drive->noflush && |
3e087b57 TH |
686 | (drive->addressing == 0 || capacity <= (1ULL << 28) || |
687 | ide_id_has_flush_cache_ext(id)); | |
688 | ||
689 | printk(KERN_INFO "%s: cache flushes %ssupported\n", | |
f7ad836c | 690 | drive->name, barrier ? "" : "not "); |
3e087b57 TH |
691 | |
692 | if (barrier) { | |
693 | ordered = QUEUE_ORDERED_DRAIN_FLUSH; | |
694 | prep_fn = idedisk_prepare_flush; | |
3e087b57 TH |
695 | } |
696 | } else | |
697 | ordered = QUEUE_ORDERED_DRAIN; | |
698 | ||
699 | blk_queue_ordered(drive->queue, ordered, prep_fn); | |
3e087b57 TH |
700 | } |
701 | ||
1da177e4 LT |
702 | static int write_cache(ide_drive_t *drive, int arg) |
703 | { | |
704 | ide_task_t args; | |
3e087b57 | 705 | int err = 1; |
1da177e4 | 706 | |
1497943e BZ |
707 | if (arg < 0 || arg > 1) |
708 | return -EINVAL; | |
709 | ||
3e087b57 TH |
710 | if (ide_id_has_flush_cache(drive->id)) { |
711 | memset(&args, 0, sizeof(ide_task_t)); | |
650d841d | 712 | args.tf.feature = arg ? |
1da177e4 | 713 | SETFEATURES_EN_WCACHE : SETFEATURES_DIS_WCACHE; |
650d841d | 714 | args.tf.command = WIN_SETFEATURES; |
a3bbb9d8 | 715 | args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE; |
9a3c49be | 716 | err = ide_no_data_taskfile(drive, &args); |
3e087b57 TH |
717 | if (err == 0) |
718 | drive->wcache = arg; | |
719 | } | |
1da177e4 | 720 | |
3e087b57 | 721 | update_ordered(drive); |
1da177e4 | 722 | |
3e087b57 | 723 | return err; |
1da177e4 LT |
724 | } |
725 | ||
726 | static int do_idedisk_flushcache (ide_drive_t *drive) | |
727 | { | |
728 | ide_task_t args; | |
729 | ||
730 | memset(&args, 0, sizeof(ide_task_t)); | |
731 | if (ide_id_has_flush_cache_ext(drive->id)) | |
650d841d | 732 | args.tf.command = WIN_FLUSH_CACHE_EXT; |
1da177e4 | 733 | else |
650d841d | 734 | args.tf.command = WIN_FLUSH_CACHE; |
a3bbb9d8 | 735 | args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE; |
9a3c49be | 736 | return ide_no_data_taskfile(drive, &args); |
1da177e4 LT |
737 | } |
738 | ||
739 | static int set_acoustic (ide_drive_t *drive, int arg) | |
740 | { | |
741 | ide_task_t args; | |
742 | ||
1497943e BZ |
743 | if (arg < 0 || arg > 254) |
744 | return -EINVAL; | |
745 | ||
1da177e4 | 746 | memset(&args, 0, sizeof(ide_task_t)); |
650d841d BZ |
747 | args.tf.feature = arg ? SETFEATURES_EN_AAM : SETFEATURES_DIS_AAM; |
748 | args.tf.nsect = arg; | |
749 | args.tf.command = WIN_SETFEATURES; | |
a3bbb9d8 | 750 | args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE; |
9a3c49be | 751 | ide_no_data_taskfile(drive, &args); |
1da177e4 LT |
752 | drive->acoustic = arg; |
753 | return 0; | |
754 | } | |
755 | ||
756 | /* | |
757 | * drive->addressing: | |
758 | * 0: 28-bit | |
759 | * 1: 48-bit | |
760 | * 2: 48-bit capable doing 28-bit | |
761 | */ | |
762 | static int set_lba_addressing(ide_drive_t *drive, int arg) | |
763 | { | |
1497943e BZ |
764 | if (arg < 0 || arg > 2) |
765 | return -EINVAL; | |
766 | ||
1da177e4 LT |
767 | drive->addressing = 0; |
768 | ||
238e4f14 | 769 | if (drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) |
1da177e4 LT |
770 | return 0; |
771 | ||
772 | if (!idedisk_supports_lba48(drive->id)) | |
773 | return -EIO; | |
774 | drive->addressing = arg; | |
775 | return 0; | |
776 | } | |
777 | ||
7662d046 | 778 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 LT |
779 | static void idedisk_add_settings(ide_drive_t *drive) |
780 | { | |
781 | struct hd_driveid *id = drive->id; | |
782 | ||
1497943e BZ |
783 | ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 65535, 1, 1, &drive->bios_cyl, NULL); |
784 | ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); | |
785 | ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); | |
786 | ide_add_setting(drive, "address", SETTING_RW, TYPE_BYTE, 0, 2, 1, 1, &drive->addressing, set_lba_addressing); | |
787 | ide_add_setting(drive, "bswap", SETTING_READ, TYPE_BYTE, 0, 1, 1, 1, &drive->bswap, NULL); | |
788 | ide_add_setting(drive, "multcount", SETTING_RW, TYPE_BYTE, 0, id->max_multsect, 1, 1, &drive->mult_count, set_multcount); | |
789 | ide_add_setting(drive, "nowerr", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->nowerr, set_nowerr); | |
790 | ide_add_setting(drive, "lun", SETTING_RW, TYPE_INT, 0, 7, 1, 1, &drive->lun, NULL); | |
791 | ide_add_setting(drive, "wcache", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->wcache, write_cache); | |
792 | ide_add_setting(drive, "acoustic", SETTING_RW, TYPE_BYTE, 0, 254, 1, 1, &drive->acoustic, set_acoustic); | |
793 | ide_add_setting(drive, "failures", SETTING_RW, TYPE_INT, 0, 65535, 1, 1, &drive->failures, NULL); | |
794 | ide_add_setting(drive, "max_failures", SETTING_RW, TYPE_INT, 0, 65535, 1, 1, &drive->max_failures, NULL); | |
1da177e4 | 795 | } |
7662d046 BZ |
796 | #else |
797 | static inline void idedisk_add_settings(ide_drive_t *drive) { ; } | |
798 | #endif | |
1da177e4 LT |
799 | |
800 | static void idedisk_setup (ide_drive_t *drive) | |
801 | { | |
238e4f14 | 802 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 LT |
803 | struct hd_driveid *id = drive->id; |
804 | unsigned long long capacity; | |
1da177e4 LT |
805 | |
806 | idedisk_add_settings(drive); | |
807 | ||
808 | if (drive->id_read == 0) | |
809 | return; | |
810 | ||
98109337 | 811 | if (drive->removable) { |
1da177e4 LT |
812 | /* |
813 | * Removable disks (eg. SYQUEST); ignore 'WD' drives | |
814 | */ | |
815 | if (id->model[0] != 'W' || id->model[1] != 'D') { | |
816 | drive->doorlocking = 1; | |
817 | } | |
818 | } | |
819 | ||
820 | (void)set_lba_addressing(drive, 1); | |
821 | ||
822 | if (drive->addressing == 1) { | |
1da177e4 LT |
823 | int max_s = 2048; |
824 | ||
825 | if (max_s > hwif->rqsize) | |
826 | max_s = hwif->rqsize; | |
827 | ||
828 | blk_queue_max_sectors(drive->queue, max_s); | |
829 | } | |
830 | ||
831 | printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, drive->queue->max_sectors / 2); | |
832 | ||
833 | /* calculate drive capacity, and select LBA if possible */ | |
834 | init_idedisk_capacity (drive); | |
835 | ||
836 | /* limit drive capacity to 137GB if LBA48 cannot be used */ | |
837 | if (drive->addressing == 0 && drive->capacity64 > 1ULL << 28) { | |
838 | printk(KERN_WARNING "%s: cannot use LBA48 - full capacity " | |
839 | "%llu sectors (%llu MB)\n", | |
840 | drive->name, (unsigned long long)drive->capacity64, | |
841 | sectors_to_MB(drive->capacity64)); | |
842 | drive->capacity64 = 1ULL << 28; | |
843 | } | |
844 | ||
238e4f14 | 845 | if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && drive->addressing) { |
1da177e4 LT |
846 | if (drive->capacity64 > 1ULL << 28) { |
847 | printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode will" | |
848 | " be used for accessing sectors > %u\n", | |
849 | drive->name, 1 << 28); | |
850 | } else | |
851 | drive->addressing = 0; | |
852 | } | |
853 | ||
854 | /* | |
855 | * if possible, give fdisk access to more of the drive, | |
856 | * by correcting bios_cyls: | |
857 | */ | |
858 | capacity = idedisk_capacity (drive); | |
859 | if (!drive->forced_geom) { | |
860 | ||
861 | if (idedisk_supports_lba48(drive->id)) { | |
862 | /* compatibility */ | |
863 | drive->bios_sect = 63; | |
864 | drive->bios_head = 255; | |
865 | } | |
866 | ||
867 | if (drive->bios_sect && drive->bios_head) { | |
868 | unsigned int cap0 = capacity; /* truncate to 32 bits */ | |
869 | unsigned int cylsz, cyl; | |
870 | ||
871 | if (cap0 != capacity) | |
872 | drive->bios_cyl = 65535; | |
873 | else { | |
874 | cylsz = drive->bios_sect * drive->bios_head; | |
875 | cyl = cap0 / cylsz; | |
876 | if (cyl > 65535) | |
877 | cyl = 65535; | |
878 | if (cyl > drive->bios_cyl) | |
879 | drive->bios_cyl = cyl; | |
880 | } | |
881 | } | |
882 | } | |
883 | printk(KERN_INFO "%s: %llu sectors (%llu MB)", | |
884 | drive->name, capacity, sectors_to_MB(capacity)); | |
885 | ||
886 | /* Only print cache size when it was specified */ | |
887 | if (id->buf_size) | |
888 | printk (" w/%dKiB Cache", id->buf_size/2); | |
889 | ||
3ab7efe8 BZ |
890 | printk(KERN_CONT ", CHS=%d/%d/%d\n", |
891 | drive->bios_cyl, drive->bios_head, drive->bios_sect); | |
1da177e4 | 892 | |
1da177e4 LT |
893 | /* write cache enabled? */ |
894 | if ((id->csfo & 1) || (id->cfs_enable_1 & (1 << 5))) | |
895 | drive->wcache = 1; | |
896 | ||
897 | write_cache(drive, 1); | |
1da177e4 LT |
898 | } |
899 | ||
900 | static void ide_cacheflush_p(ide_drive_t *drive) | |
901 | { | |
902 | if (!drive->wcache || !ide_id_has_flush_cache(drive->id)) | |
903 | return; | |
904 | ||
905 | if (do_idedisk_flushcache(drive)) | |
906 | printk(KERN_INFO "%s: wcache flush failed!\n", drive->name); | |
907 | } | |
908 | ||
4031bbe4 | 909 | static void ide_disk_remove(ide_drive_t *drive) |
1da177e4 LT |
910 | { |
911 | struct ide_disk_obj *idkp = drive->driver_data; | |
912 | struct gendisk *g = idkp->disk; | |
913 | ||
7662d046 | 914 | ide_proc_unregister_driver(drive, idkp->driver); |
8604affd | 915 | |
1da177e4 LT |
916 | del_gendisk(g); |
917 | ||
d36fef6f BZ |
918 | ide_cacheflush_p(drive); |
919 | ||
1da177e4 | 920 | ide_disk_put(idkp); |
1da177e4 LT |
921 | } |
922 | ||
923 | static void ide_disk_release(struct kref *kref) | |
924 | { | |
925 | struct ide_disk_obj *idkp = to_ide_disk(kref); | |
926 | ide_drive_t *drive = idkp->drive; | |
927 | struct gendisk *g = idkp->disk; | |
928 | ||
929 | drive->driver_data = NULL; | |
1da177e4 LT |
930 | g->private_data = NULL; |
931 | put_disk(g); | |
932 | kfree(idkp); | |
933 | } | |
934 | ||
4031bbe4 | 935 | static int ide_disk_probe(ide_drive_t *drive); |
1da177e4 | 936 | |
0d2157f7 LT |
937 | /* |
938 | * On HPA drives the capacity needs to be | |
939 | * reinitilized on resume otherwise the disk | |
940 | * can not be used and a hard reset is required | |
941 | */ | |
942 | static void ide_disk_resume(ide_drive_t *drive) | |
943 | { | |
944 | if (idedisk_supports_hpa(drive->id)) | |
945 | init_idedisk_capacity(drive); | |
946 | } | |
947 | ||
4031bbe4 | 948 | static void ide_device_shutdown(ide_drive_t *drive) |
1da177e4 | 949 | { |
1da177e4 LT |
950 | #ifdef CONFIG_ALPHA |
951 | /* On Alpha, halt(8) doesn't actually turn the machine off, | |
952 | it puts you into the sort of firmware monitor. Typically, | |
953 | it's used to boot another kernel image, so it's not much | |
954 | different from reboot(8). Therefore, we don't need to | |
955 | spin down the disk in this case, especially since Alpha | |
956 | firmware doesn't handle disks in standby mode properly. | |
957 | On the other hand, it's reasonably safe to turn the power | |
958 | off when the shutdown process reaches the firmware prompt, | |
959 | as the firmware initialization takes rather long time - | |
960 | at least 10 seconds, which should be sufficient for | |
961 | the disk to expire its write cache. */ | |
962 | if (system_state != SYSTEM_POWER_OFF) { | |
963 | #else | |
964 | if (system_state == SYSTEM_RESTART) { | |
965 | #endif | |
966 | ide_cacheflush_p(drive); | |
967 | return; | |
968 | } | |
969 | ||
970 | printk("Shutdown: %s\n", drive->name); | |
4031bbe4 | 971 | drive->gendev.bus->suspend(&drive->gendev, PMSG_SUSPEND); |
1da177e4 LT |
972 | } |
973 | ||
1da177e4 | 974 | static ide_driver_t idedisk_driver = { |
1da177e4 | 975 | .gen_driver = { |
4ef3b8f4 | 976 | .owner = THIS_MODULE, |
8604affd BZ |
977 | .name = "ide-disk", |
978 | .bus = &ide_bus_type, | |
1da177e4 | 979 | }, |
4031bbe4 RK |
980 | .probe = ide_disk_probe, |
981 | .remove = ide_disk_remove, | |
0d2157f7 | 982 | .resume = ide_disk_resume, |
4031bbe4 | 983 | .shutdown = ide_device_shutdown, |
1da177e4 LT |
984 | .version = IDEDISK_VERSION, |
985 | .media = ide_disk, | |
1da177e4 | 986 | .supports_dsc_overlap = 0, |
1da177e4 LT |
987 | .do_request = ide_do_rw_disk, |
988 | .end_request = ide_end_request, | |
989 | .error = __ide_error, | |
990 | .abort = __ide_abort, | |
7662d046 | 991 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 | 992 | .proc = idedisk_proc, |
7662d046 | 993 | #endif |
1da177e4 LT |
994 | }; |
995 | ||
996 | static int idedisk_open(struct inode *inode, struct file *filp) | |
997 | { | |
998 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
999 | struct ide_disk_obj *idkp; | |
1000 | ide_drive_t *drive; | |
1001 | ||
1002 | if (!(idkp = ide_disk_get(disk))) | |
1003 | return -ENXIO; | |
1004 | ||
1005 | drive = idkp->drive; | |
1006 | ||
c94964a4 BZ |
1007 | idkp->openers++; |
1008 | ||
1009 | if (drive->removable && idkp->openers == 1) { | |
1da177e4 LT |
1010 | ide_task_t args; |
1011 | memset(&args, 0, sizeof(ide_task_t)); | |
650d841d | 1012 | args.tf.command = WIN_DOORLOCK; |
a3bbb9d8 | 1013 | args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE; |
1da177e4 LT |
1014 | check_disk_change(inode->i_bdev); |
1015 | /* | |
1016 | * Ignore the return code from door_lock, | |
1017 | * since the open() has already succeeded, | |
1018 | * and the door_lock is irrelevant at this point. | |
1019 | */ | |
9a3c49be | 1020 | if (drive->doorlocking && ide_no_data_taskfile(drive, &args)) |
1da177e4 LT |
1021 | drive->doorlocking = 0; |
1022 | } | |
1023 | return 0; | |
1024 | } | |
1025 | ||
1026 | static int idedisk_release(struct inode *inode, struct file *filp) | |
1027 | { | |
1028 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
1029 | struct ide_disk_obj *idkp = ide_disk_g(disk); | |
1030 | ide_drive_t *drive = idkp->drive; | |
1031 | ||
c94964a4 | 1032 | if (idkp->openers == 1) |
1da177e4 | 1033 | ide_cacheflush_p(drive); |
c94964a4 BZ |
1034 | |
1035 | if (drive->removable && idkp->openers == 1) { | |
1da177e4 LT |
1036 | ide_task_t args; |
1037 | memset(&args, 0, sizeof(ide_task_t)); | |
650d841d | 1038 | args.tf.command = WIN_DOORUNLOCK; |
a3bbb9d8 | 1039 | args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE; |
9a3c49be | 1040 | if (drive->doorlocking && ide_no_data_taskfile(drive, &args)) |
1da177e4 LT |
1041 | drive->doorlocking = 0; |
1042 | } | |
c94964a4 BZ |
1043 | |
1044 | idkp->openers--; | |
1da177e4 LT |
1045 | |
1046 | ide_disk_put(idkp); | |
1047 | ||
1048 | return 0; | |
1049 | } | |
1050 | ||
a885c8c4 CH |
1051 | static int idedisk_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1052 | { | |
1053 | struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk); | |
1054 | ide_drive_t *drive = idkp->drive; | |
1055 | ||
1056 | geo->heads = drive->bios_head; | |
1057 | geo->sectors = drive->bios_sect; | |
1058 | geo->cylinders = (u16)drive->bios_cyl; /* truncate */ | |
1059 | return 0; | |
1060 | } | |
1061 | ||
1da177e4 LT |
1062 | static int idedisk_ioctl(struct inode *inode, struct file *file, |
1063 | unsigned int cmd, unsigned long arg) | |
1064 | { | |
1497943e | 1065 | unsigned long flags; |
1da177e4 LT |
1066 | struct block_device *bdev = inode->i_bdev; |
1067 | struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk); | |
1497943e BZ |
1068 | ide_drive_t *drive = idkp->drive; |
1069 | int err, (*setfunc)(ide_drive_t *, int); | |
1070 | u8 *val; | |
1071 | ||
1072 | switch (cmd) { | |
1073 | case HDIO_GET_ADDRESS: val = &drive->addressing; goto read_val; | |
1074 | case HDIO_GET_MULTCOUNT: val = &drive->mult_count; goto read_val; | |
1075 | case HDIO_GET_NOWERR: val = &drive->nowerr; goto read_val; | |
1076 | case HDIO_GET_WCACHE: val = &drive->wcache; goto read_val; | |
1077 | case HDIO_GET_ACOUSTIC: val = &drive->acoustic; goto read_val; | |
1078 | case HDIO_SET_ADDRESS: setfunc = set_lba_addressing; goto set_val; | |
1079 | case HDIO_SET_MULTCOUNT: setfunc = set_multcount; goto set_val; | |
1080 | case HDIO_SET_NOWERR: setfunc = set_nowerr; goto set_val; | |
1081 | case HDIO_SET_WCACHE: setfunc = write_cache; goto set_val; | |
1082 | case HDIO_SET_ACOUSTIC: setfunc = set_acoustic; goto set_val; | |
1083 | } | |
1084 | ||
1085 | return generic_ide_ioctl(drive, file, bdev, cmd, arg); | |
1086 | ||
1087 | read_val: | |
f9383c42 | 1088 | mutex_lock(&ide_setting_mtx); |
1497943e BZ |
1089 | spin_lock_irqsave(&ide_lock, flags); |
1090 | err = *val; | |
1091 | spin_unlock_irqrestore(&ide_lock, flags); | |
f9383c42 | 1092 | mutex_unlock(&ide_setting_mtx); |
1497943e BZ |
1093 | return err >= 0 ? put_user(err, (long __user *)arg) : err; |
1094 | ||
1095 | set_val: | |
1096 | if (bdev != bdev->bd_contains) | |
1097 | err = -EINVAL; | |
1098 | else { | |
1099 | if (!capable(CAP_SYS_ADMIN)) | |
1100 | err = -EACCES; | |
1101 | else { | |
f9383c42 | 1102 | mutex_lock(&ide_setting_mtx); |
1497943e | 1103 | err = setfunc(drive, arg); |
f9383c42 | 1104 | mutex_unlock(&ide_setting_mtx); |
1497943e BZ |
1105 | } |
1106 | } | |
1107 | return err; | |
1da177e4 LT |
1108 | } |
1109 | ||
1110 | static int idedisk_media_changed(struct gendisk *disk) | |
1111 | { | |
1112 | struct ide_disk_obj *idkp = ide_disk_g(disk); | |
1113 | ide_drive_t *drive = idkp->drive; | |
1114 | ||
1115 | /* do not scan partitions twice if this is a removable device */ | |
1116 | if (drive->attach) { | |
1117 | drive->attach = 0; | |
1118 | return 0; | |
1119 | } | |
1120 | /* if removable, always assume it was changed */ | |
1121 | return drive->removable; | |
1122 | } | |
1123 | ||
1124 | static int idedisk_revalidate_disk(struct gendisk *disk) | |
1125 | { | |
1126 | struct ide_disk_obj *idkp = ide_disk_g(disk); | |
1127 | set_capacity(disk, idedisk_capacity(idkp->drive)); | |
1128 | return 0; | |
1129 | } | |
1130 | ||
1131 | static struct block_device_operations idedisk_ops = { | |
1132 | .owner = THIS_MODULE, | |
1133 | .open = idedisk_open, | |
1134 | .release = idedisk_release, | |
1135 | .ioctl = idedisk_ioctl, | |
a885c8c4 | 1136 | .getgeo = idedisk_getgeo, |
1da177e4 LT |
1137 | .media_changed = idedisk_media_changed, |
1138 | .revalidate_disk= idedisk_revalidate_disk | |
1139 | }; | |
1140 | ||
1141 | MODULE_DESCRIPTION("ATA DISK Driver"); | |
1142 | ||
4031bbe4 | 1143 | static int ide_disk_probe(ide_drive_t *drive) |
1da177e4 LT |
1144 | { |
1145 | struct ide_disk_obj *idkp; | |
1146 | struct gendisk *g; | |
1147 | ||
1148 | /* strstr("foo", "") is non-NULL */ | |
1149 | if (!strstr("ide-disk", drive->driver_req)) | |
1150 | goto failed; | |
1151 | if (!drive->present) | |
1152 | goto failed; | |
1153 | if (drive->media != ide_disk) | |
1154 | goto failed; | |
1155 | ||
f5e3c2fa | 1156 | idkp = kzalloc(sizeof(*idkp), GFP_KERNEL); |
1da177e4 LT |
1157 | if (!idkp) |
1158 | goto failed; | |
1159 | ||
1946089a | 1160 | g = alloc_disk_node(1 << PARTN_BITS, |
86b37860 | 1161 | hwif_to_node(drive->hwif)); |
1da177e4 LT |
1162 | if (!g) |
1163 | goto out_free_idkp; | |
1164 | ||
1165 | ide_init_disk(g, drive); | |
1166 | ||
7662d046 | 1167 | ide_proc_register_driver(drive, &idedisk_driver); |
1da177e4 | 1168 | |
1da177e4 LT |
1169 | kref_init(&idkp->kref); |
1170 | ||
1171 | idkp->drive = drive; | |
1172 | idkp->driver = &idedisk_driver; | |
1173 | idkp->disk = g; | |
1174 | ||
1175 | g->private_data = &idkp->driver; | |
1176 | ||
1177 | drive->driver_data = idkp; | |
1178 | ||
1da177e4 LT |
1179 | idedisk_setup(drive); |
1180 | if ((!drive->head || drive->head > 16) && !drive->select.b.lba) { | |
1181 | printk(KERN_ERR "%s: INVALID GEOMETRY: %d PHYSICAL HEADS?\n", | |
1182 | drive->name, drive->head); | |
1183 | drive->attach = 0; | |
1184 | } else | |
1185 | drive->attach = 1; | |
8604affd | 1186 | |
1da177e4 | 1187 | g->minors = 1 << PARTN_BITS; |
1da177e4 LT |
1188 | g->driverfs_dev = &drive->gendev; |
1189 | g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; | |
1190 | set_capacity(g, idedisk_capacity(drive)); | |
1191 | g->fops = &idedisk_ops; | |
1192 | add_disk(g); | |
1193 | return 0; | |
1194 | ||
1da177e4 LT |
1195 | out_free_idkp: |
1196 | kfree(idkp); | |
1197 | failed: | |
8604affd | 1198 | return -ENODEV; |
1da177e4 LT |
1199 | } |
1200 | ||
1201 | static void __exit idedisk_exit (void) | |
1202 | { | |
8604affd | 1203 | driver_unregister(&idedisk_driver.gen_driver); |
1da177e4 LT |
1204 | } |
1205 | ||
17514e8a | 1206 | static int __init idedisk_init(void) |
1da177e4 | 1207 | { |
8604affd | 1208 | return driver_register(&idedisk_driver.gen_driver); |
1da177e4 LT |
1209 | } |
1210 | ||
263756ec | 1211 | MODULE_ALIAS("ide:*m-disk*"); |
1da177e4 LT |
1212 | module_init(idedisk_init); |
1213 | module_exit(idedisk_exit); | |
1214 | MODULE_LICENSE("GPL"); |