Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
59bca8cc BZ |
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 <alan@redhat.com> | |
6 | * Copyright (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz | |
1da177e4 LT |
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. | |
1da177e4 LT |
15 | */ |
16 | ||
17 | #define IDEDISK_VERSION "1.18" | |
18 | ||
1da177e4 LT |
19 | #include <linux/module.h> |
20 | #include <linux/types.h> | |
21 | #include <linux/string.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/timer.h> | |
24 | #include <linux/mm.h> | |
25 | #include <linux/interrupt.h> | |
26 | #include <linux/major.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/genhd.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/delay.h> | |
cf8b8975 | 31 | #include <linux/mutex.h> |
2bfb646c | 32 | #include <linux/leds.h> |
1da177e4 | 33 | #include <linux/ide.h> |
3ceca727 | 34 | #include <linux/hdreg.h> |
1da177e4 LT |
35 | |
36 | #include <asm/byteorder.h> | |
37 | #include <asm/irq.h> | |
38 | #include <asm/uaccess.h> | |
39 | #include <asm/io.h> | |
40 | #include <asm/div64.h> | |
41 | ||
870d6656 | 42 | #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) |
689d6fac | 43 | #define IDE_DISK_MINORS (1 << PARTN_BITS) |
870d6656 | 44 | #else |
3e1a7ff8 | 45 | #define IDE_DISK_MINORS 0 |
870d6656 TH |
46 | #endif |
47 | ||
f8790489 | 48 | #include "ide-disk.h" |
1da177e4 | 49 | |
cf8b8975 | 50 | static DEFINE_MUTEX(idedisk_ref_mutex); |
1da177e4 | 51 | |
08da591e BZ |
52 | static void ide_disk_release(struct kref *); |
53 | ||
1da177e4 LT |
54 | static struct ide_disk_obj *ide_disk_get(struct gendisk *disk) |
55 | { | |
56 | struct ide_disk_obj *idkp = NULL; | |
57 | ||
cf8b8975 | 58 | mutex_lock(&idedisk_ref_mutex); |
d7e74759 | 59 | idkp = ide_drv_g(disk, ide_disk_obj); |
08da591e | 60 | if (idkp) { |
d3e33ff5 | 61 | if (ide_device_get(idkp->drive)) |
08da591e | 62 | idkp = NULL; |
d3e33ff5 BZ |
63 | else |
64 | kref_get(&idkp->kref); | |
08da591e | 65 | } |
cf8b8975 | 66 | mutex_unlock(&idedisk_ref_mutex); |
1da177e4 LT |
67 | return idkp; |
68 | } | |
69 | ||
1da177e4 LT |
70 | static void ide_disk_put(struct ide_disk_obj *idkp) |
71 | { | |
d3e33ff5 BZ |
72 | ide_drive_t *drive = idkp->drive; |
73 | ||
cf8b8975 | 74 | mutex_lock(&idedisk_ref_mutex); |
1da177e4 | 75 | kref_put(&idkp->kref, ide_disk_release); |
d3e33ff5 | 76 | ide_device_put(drive); |
cf8b8975 | 77 | mutex_unlock(&idedisk_ref_mutex); |
1da177e4 LT |
78 | } |
79 | ||
ba76ae38 | 80 | static const u8 ide_rw_cmds[] = { |
aaaade3f BZ |
81 | ATA_CMD_READ_MULTI, |
82 | ATA_CMD_WRITE_MULTI, | |
83 | ATA_CMD_READ_MULTI_EXT, | |
84 | ATA_CMD_WRITE_MULTI_EXT, | |
85 | ATA_CMD_PIO_READ, | |
86 | ATA_CMD_PIO_WRITE, | |
87 | ATA_CMD_PIO_READ_EXT, | |
88 | ATA_CMD_PIO_WRITE_EXT, | |
89 | ATA_CMD_READ, | |
90 | ATA_CMD_WRITE, | |
91 | ATA_CMD_READ_EXT, | |
92 | ATA_CMD_WRITE_EXT, | |
ba76ae38 BZ |
93 | }; |
94 | ||
95 | static const u8 ide_data_phases[] = { | |
96 | TASKFILE_MULTI_IN, | |
97 | TASKFILE_MULTI_OUT, | |
98 | TASKFILE_IN, | |
99 | TASKFILE_OUT, | |
100 | TASKFILE_IN_DMA, | |
101 | TASKFILE_OUT_DMA, | |
102 | }; | |
103 | ||
104 | static void ide_tf_set_cmd(ide_drive_t *drive, ide_task_t *task, u8 dma) | |
105 | { | |
106 | u8 index, lba48, write; | |
107 | ||
108 | lba48 = (task->tf_flags & IDE_TFLAG_LBA48) ? 2 : 0; | |
109 | write = (task->tf_flags & IDE_TFLAG_WRITE) ? 1 : 0; | |
110 | ||
111 | if (dma) | |
ba4b2e60 | 112 | index = 8; |
ba76ae38 BZ |
113 | else |
114 | index = drive->mult_count ? 0 : 4; | |
115 | ||
116 | task->tf.command = ide_rw_cmds[index + lba48 + write]; | |
117 | ||
118 | if (dma) | |
119 | index = 8; /* fixup index */ | |
120 | ||
121 | task->data_phase = ide_data_phases[index / 2 + write]; | |
122 | } | |
123 | ||
1da177e4 LT |
124 | /* |
125 | * __ide_do_rw_disk() issues READ and WRITE commands to a disk, | |
126 | * using LBA if supported, or CHS otherwise, to address sectors. | |
127 | */ | |
98416549 BZ |
128 | static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq, |
129 | sector_t block) | |
1da177e4 LT |
130 | { |
131 | ide_hwif_t *hwif = HWIF(drive); | |
790d1239 | 132 | u16 nsectors = (u16)rq->nr_sectors; |
97100fc8 BZ |
133 | u8 lba48 = !!(drive->dev_flags & IDE_DFLAG_LBA48); |
134 | u8 dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); | |
9e42237f BZ |
135 | ide_task_t task; |
136 | struct ide_taskfile *tf = &task.tf; | |
f6e29e35 | 137 | ide_startstop_t rc; |
1da177e4 | 138 | |
238e4f14 | 139 | if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) { |
1da177e4 LT |
140 | if (block + rq->nr_sectors > 1ULL << 28) |
141 | dma = 0; | |
142 | else | |
143 | lba48 = 0; | |
144 | } | |
145 | ||
146 | if (!dma) { | |
147 | ide_init_sg_cmd(drive, rq); | |
148 | ide_map_sg(drive, rq); | |
149 | } | |
150 | ||
9e42237f | 151 | memset(&task, 0, sizeof(task)); |
9a410e79 | 152 | task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; |
2bd06b23 | 153 | |
d1d76714 | 154 | if (drive->dev_flags & IDE_DFLAG_LBA) { |
1da177e4 | 155 | if (lba48) { |
c2f8311d MR |
156 | pr_debug("%s: LBA=0x%012llx\n", drive->name, |
157 | (unsigned long long)block); | |
1da177e4 | 158 | |
790d1239 | 159 | tf->hob_nsect = (nsectors >> 8) & 0xff; |
2bd06b23 BZ |
160 | tf->hob_lbal = (u8)(block >> 24); |
161 | if (sizeof(block) != 4) { | |
162 | tf->hob_lbam = (u8)((u64)block >> 32); | |
163 | tf->hob_lbah = (u8)((u64)block >> 40); | |
1da177e4 | 164 | } |
2bd06b23 | 165 | |
790d1239 | 166 | tf->nsect = nsectors & 0xff; |
2bd06b23 BZ |
167 | tf->lbal = (u8) block; |
168 | tf->lbam = (u8)(block >> 8); | |
169 | tf->lbah = (u8)(block >> 16); | |
6dd9b837 | 170 | |
657cc1a8 | 171 | task.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB); |
1da177e4 | 172 | } else { |
790d1239 | 173 | tf->nsect = nsectors & 0xff; |
2bd06b23 BZ |
174 | tf->lbal = block; |
175 | tf->lbam = block >>= 8; | |
176 | tf->lbah = block >>= 8; | |
177 | tf->device = (block >> 8) & 0xf; | |
1da177e4 | 178 | } |
d1d76714 BZ |
179 | |
180 | tf->device |= ATA_LBA; | |
1da177e4 | 181 | } else { |
98416549 BZ |
182 | unsigned int sect, head, cyl, track; |
183 | ||
1da177e4 LT |
184 | track = (int)block / drive->sect; |
185 | sect = (int)block % drive->sect + 1; | |
1da177e4 LT |
186 | head = track % drive->head; |
187 | cyl = track / drive->head; | |
188 | ||
189 | pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect); | |
190 | ||
790d1239 | 191 | tf->nsect = nsectors & 0xff; |
2bd06b23 BZ |
192 | tf->lbal = sect; |
193 | tf->lbam = cyl; | |
194 | tf->lbah = cyl >> 8; | |
195 | tf->device = head; | |
1da177e4 LT |
196 | } |
197 | ||
ba76ae38 BZ |
198 | if (rq_data_dir(rq)) |
199 | task.tf_flags |= IDE_TFLAG_WRITE; | |
200 | ||
201 | ide_tf_set_cmd(drive, &task, dma); | |
f6e29e35 BZ |
202 | if (!dma) |
203 | hwif->data_phase = task.data_phase; | |
204 | task.rq = rq; | |
ba76ae38 | 205 | |
f6e29e35 | 206 | rc = do_rw_taskfile(drive, &task); |
2bd06b23 | 207 | |
f6e29e35 | 208 | if (rc == ide_stopped && dma) { |
1da177e4 | 209 | /* fallback to PIO */ |
f6e29e35 | 210 | task.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK; |
ba76ae38 | 211 | ide_tf_set_cmd(drive, &task, 0); |
f6e29e35 | 212 | hwif->data_phase = task.data_phase; |
1da177e4 | 213 | ide_init_sg_cmd(drive, rq); |
f6e29e35 | 214 | rc = do_rw_taskfile(drive, &task); |
1da177e4 LT |
215 | } |
216 | ||
f6e29e35 | 217 | return rc; |
1da177e4 LT |
218 | } |
219 | ||
220 | /* | |
221 | * 268435455 == 137439 MB or 28bit limit | |
222 | * 320173056 == 163929 MB or 48bit addressing | |
223 | * 1073741822 == 549756 MB or 48bit addressing fake drive | |
224 | */ | |
225 | ||
98416549 BZ |
226 | static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq, |
227 | sector_t block) | |
1da177e4 LT |
228 | { |
229 | ide_hwif_t *hwif = HWIF(drive); | |
230 | ||
97100fc8 | 231 | BUG_ON(drive->dev_flags & IDE_DFLAG_BLOCKED); |
1da177e4 LT |
232 | |
233 | if (!blk_fs_request(rq)) { | |
234 | blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command"); | |
235 | ide_end_request(drive, 0, 0); | |
236 | return ide_stopped; | |
237 | } | |
238 | ||
2bfb646c RP |
239 | ledtrig_ide_activity(); |
240 | ||
1da177e4 LT |
241 | pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n", |
242 | drive->name, rq_data_dir(rq) == READ ? "read" : "writ", | |
c2f8311d MR |
243 | (unsigned long long)block, rq->nr_sectors, |
244 | (unsigned long)rq->buffer); | |
1da177e4 LT |
245 | |
246 | if (hwif->rw_disk) | |
247 | hwif->rw_disk(drive, rq); | |
248 | ||
249 | return __ide_do_rw_disk(drive, rq, block); | |
250 | } | |
251 | ||
252 | /* | |
253 | * Queries for true maximum capacity of the drive. | |
254 | * Returns maximum LBA address (> 0) of the drive, 0 if failed. | |
255 | */ | |
7a3b7512 | 256 | static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48) |
1da177e4 LT |
257 | { |
258 | ide_task_t args; | |
650d841d | 259 | struct ide_taskfile *tf = &args.tf; |
7a3b7512 | 260 | u64 addr = 0; |
1da177e4 LT |
261 | |
262 | /* Create IDE/ATA command request structure */ | |
263 | memset(&args, 0, sizeof(ide_task_t)); | |
7a3b7512 | 264 | if (lba48) |
aaaade3f | 265 | tf->command = ATA_CMD_READ_NATIVE_MAX_EXT; |
7a3b7512 | 266 | else |
aaaade3f | 267 | tf->command = ATA_CMD_READ_NATIVE_MAX; |
650d841d | 268 | tf->device = ATA_LBA; |
657cc1a8 | 269 | args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; |
a3bbb9d8 | 270 | if (lba48) |
657cc1a8 | 271 | args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB); |
1da177e4 | 272 | /* submit command request */ |
9a3c49be | 273 | ide_no_data_taskfile(drive, &args); |
1da177e4 | 274 | |
1da177e4 | 275 | /* if OK, compute maximum address value */ |
a501633c BZ |
276 | if ((tf->status & 0x01) == 0) |
277 | addr = ide_get_lba_addr(tf, lba48) + 1; | |
650d841d | 278 | |
1da177e4 LT |
279 | return addr; |
280 | } | |
281 | ||
282 | /* | |
283 | * Sets maximum virtual LBA address of the drive. | |
284 | * Returns new maximum virtual LBA address (> 0) or 0 on failure. | |
285 | */ | |
7a3b7512 | 286 | static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48) |
1da177e4 LT |
287 | { |
288 | ide_task_t args; | |
650d841d | 289 | struct ide_taskfile *tf = &args.tf; |
7a3b7512 | 290 | u64 addr_set = 0; |
1da177e4 LT |
291 | |
292 | addr_req--; | |
293 | /* Create IDE/ATA command request structure */ | |
294 | memset(&args, 0, sizeof(ide_task_t)); | |
650d841d BZ |
295 | tf->lbal = (addr_req >> 0) & 0xff; |
296 | tf->lbam = (addr_req >>= 8) & 0xff; | |
297 | tf->lbah = (addr_req >>= 8) & 0xff; | |
7a3b7512 BZ |
298 | if (lba48) { |
299 | tf->hob_lbal = (addr_req >>= 8) & 0xff; | |
300 | tf->hob_lbam = (addr_req >>= 8) & 0xff; | |
301 | tf->hob_lbah = (addr_req >>= 8) & 0xff; | |
aaaade3f | 302 | tf->command = ATA_CMD_SET_MAX_EXT; |
7a3b7512 BZ |
303 | } else { |
304 | tf->device = (addr_req >>= 8) & 0x0f; | |
aaaade3f | 305 | tf->command = ATA_CMD_SET_MAX; |
7a3b7512 BZ |
306 | } |
307 | tf->device |= ATA_LBA; | |
657cc1a8 | 308 | args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; |
a3bbb9d8 | 309 | if (lba48) |
657cc1a8 | 310 | args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB); |
1da177e4 | 311 | /* submit command request */ |
9a3c49be | 312 | ide_no_data_taskfile(drive, &args); |
1da177e4 | 313 | /* if OK, compute maximum address value */ |
a501633c BZ |
314 | if ((tf->status & 0x01) == 0) |
315 | addr_set = ide_get_lba_addr(tf, lba48) + 1; | |
650d841d | 316 | |
1da177e4 LT |
317 | return addr_set; |
318 | } | |
319 | ||
320 | static unsigned long long sectors_to_MB(unsigned long long n) | |
321 | { | |
322 | n <<= 9; /* make it bytes */ | |
323 | do_div(n, 1000000); /* make it MB */ | |
324 | return n; | |
325 | } | |
326 | ||
b0244a00 BZ |
327 | /* |
328 | * Some disks report total number of sectors instead of | |
329 | * maximum sector address. We list them here. | |
330 | */ | |
331 | static const struct drive_list_entry hpa_list[] = { | |
332 | { "ST340823A", NULL }, | |
7062cdc5 | 333 | { "ST320413A", NULL }, |
b152fcd3 | 334 | { "ST310211A", NULL }, |
b0244a00 BZ |
335 | { NULL, NULL } |
336 | }; | |
337 | ||
858119e1 | 338 | static void idedisk_check_hpa(ide_drive_t *drive) |
1da177e4 LT |
339 | { |
340 | unsigned long long capacity, set_max; | |
942dcd85 | 341 | int lba48 = ata_id_lba48_enabled(drive->id); |
1da177e4 LT |
342 | |
343 | capacity = drive->capacity64; | |
7a3b7512 BZ |
344 | |
345 | set_max = idedisk_read_native_max_address(drive, lba48); | |
1da177e4 | 346 | |
b0244a00 BZ |
347 | if (ide_in_drive_list(drive->id, hpa_list)) { |
348 | /* | |
349 | * Since we are inclusive wrt to firmware revisions do this | |
350 | * extra check and apply the workaround only when needed. | |
351 | */ | |
352 | if (set_max == capacity + 1) | |
353 | set_max--; | |
354 | } | |
355 | ||
1da177e4 LT |
356 | if (set_max <= capacity) |
357 | return; | |
358 | ||
359 | printk(KERN_INFO "%s: Host Protected Area detected.\n" | |
360 | "\tcurrent capacity is %llu sectors (%llu MB)\n" | |
361 | "\tnative capacity is %llu sectors (%llu MB)\n", | |
362 | drive->name, | |
363 | capacity, sectors_to_MB(capacity), | |
364 | set_max, sectors_to_MB(set_max)); | |
365 | ||
7a3b7512 BZ |
366 | set_max = idedisk_set_max_address(drive, set_max, lba48); |
367 | ||
1da177e4 LT |
368 | if (set_max) { |
369 | drive->capacity64 = set_max; | |
370 | printk(KERN_INFO "%s: Host Protected Area disabled.\n", | |
371 | drive->name); | |
372 | } | |
373 | } | |
374 | ||
98416549 | 375 | static void init_idedisk_capacity(ide_drive_t *drive) |
1da177e4 | 376 | { |
4dde4492 | 377 | u16 *id = drive->id; |
d1d76714 | 378 | int lba; |
1da177e4 | 379 | |
942dcd85 | 380 | if (ata_id_lba48_enabled(id)) { |
1da177e4 | 381 | /* drive speaks 48-bit LBA */ |
d1d76714 | 382 | lba = 1; |
48fb2688 | 383 | drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2); |
a02227c9 | 384 | } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) { |
1da177e4 | 385 | /* drive speaks 28-bit LBA */ |
d1d76714 | 386 | lba = 1; |
48fb2688 | 387 | drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY); |
1da177e4 LT |
388 | } else { |
389 | /* drive speaks boring old 28-bit CHS */ | |
d1d76714 | 390 | lba = 0; |
1da177e4 LT |
391 | drive->capacity64 = drive->cyl * drive->head * drive->sect; |
392 | } | |
d1d76714 BZ |
393 | |
394 | if (lba) { | |
395 | drive->dev_flags |= IDE_DFLAG_LBA; | |
396 | ||
397 | /* | |
398 | * If this device supports the Host Protected Area feature set, | |
399 | * then we may need to change our opinion about its capacity. | |
400 | */ | |
401 | if (ata_id_hpa_enabled(id)) | |
402 | idedisk_check_hpa(drive); | |
403 | } | |
0a70c7f6 BZ |
404 | |
405 | /* limit drive capacity to 137GB if LBA48 cannot be used */ | |
406 | if ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 && | |
407 | drive->capacity64 > 1ULL << 28) { | |
408 | printk(KERN_WARNING "%s: cannot use LBA48 - full capacity " | |
409 | "%llu sectors (%llu MB)\n", | |
410 | drive->name, (unsigned long long)drive->capacity64, | |
411 | sectors_to_MB(drive->capacity64)); | |
412 | drive->capacity64 = 1ULL << 28; | |
413 | } | |
414 | ||
415 | if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && | |
416 | (drive->dev_flags & IDE_DFLAG_LBA48)) { | |
417 | if (drive->capacity64 > 1ULL << 28) { | |
418 | printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode" | |
419 | " will be used for accessing sectors " | |
420 | "> %u\n", drive->name, 1 << 28); | |
421 | } else | |
422 | drive->dev_flags &= ~IDE_DFLAG_LBA48; | |
423 | } | |
1da177e4 LT |
424 | } |
425 | ||
06b89518 | 426 | sector_t ide_disk_capacity(ide_drive_t *drive) |
1da177e4 | 427 | { |
3c619ffd | 428 | return drive->capacity64; |
1da177e4 LT |
429 | } |
430 | ||
165125e1 | 431 | static void idedisk_prepare_flush(struct request_queue *q, struct request *rq) |
1da177e4 LT |
432 | { |
433 | ide_drive_t *drive = q->queuedata; | |
395d8ef5 | 434 | ide_task_t *task = kmalloc(sizeof(*task), GFP_ATOMIC); |
1da177e4 | 435 | |
395d8ef5 BZ |
436 | /* FIXME: map struct ide_taskfile on rq->cmd[] */ |
437 | BUG_ON(task == NULL); | |
438 | ||
439 | memset(task, 0, sizeof(*task)); | |
ff2779b5 | 440 | if (ata_id_flush_ext_enabled(drive->id) && |
1da177e4 | 441 | (drive->capacity64 >= (1UL << 28))) |
aaaade3f | 442 | task->tf.command = ATA_CMD_FLUSH_EXT; |
1da177e4 | 443 | else |
aaaade3f | 444 | task->tf.command = ATA_CMD_FLUSH; |
395d8ef5 BZ |
445 | task->tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE | |
446 | IDE_TFLAG_DYN; | |
447 | task->data_phase = TASKFILE_NO_DATA; | |
1da177e4 | 448 | |
813a0eb2 | 449 | rq->cmd_type = REQ_TYPE_ATA_TASKFILE; |
4aff5e23 | 450 | rq->cmd_flags |= REQ_SOFTBARRIER; |
395d8ef5 | 451 | rq->special = task; |
1da177e4 LT |
452 | } |
453 | ||
8185d5aa BZ |
454 | ide_devset_get(multcount, mult_count); |
455 | ||
1da177e4 LT |
456 | /* |
457 | * This is tightly woven into the driver->do_special can not touch. | |
458 | * DON'T do it again until a total personality rewrite is committed. | |
459 | */ | |
460 | static int set_multcount(ide_drive_t *drive, int arg) | |
461 | { | |
dd47087b FT |
462 | struct request *rq; |
463 | int error; | |
1da177e4 | 464 | |
48fb2688 | 465 | if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff)) |
1497943e BZ |
466 | return -EINVAL; |
467 | ||
1da177e4 LT |
468 | if (drive->special.b.set_multmode) |
469 | return -EBUSY; | |
852738f3 | 470 | |
dd47087b FT |
471 | rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
472 | rq->cmd_type = REQ_TYPE_ATA_TASKFILE; | |
852738f3 | 473 | |
1da177e4 LT |
474 | drive->mult_req = arg; |
475 | drive->special.b.set_multmode = 1; | |
dd47087b FT |
476 | error = blk_execute_rq(drive->queue, NULL, rq, 0); |
477 | blk_put_request(rq); | |
98416549 | 478 | |
1da177e4 LT |
479 | return (drive->mult_count == arg) ? 0 : -EIO; |
480 | } | |
481 | ||
97100fc8 | 482 | ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR); |
8185d5aa | 483 | |
1da177e4 LT |
484 | static int set_nowerr(ide_drive_t *drive, int arg) |
485 | { | |
1497943e BZ |
486 | if (arg < 0 || arg > 1) |
487 | return -EINVAL; | |
488 | ||
97100fc8 BZ |
489 | if (arg) |
490 | drive->dev_flags |= IDE_DFLAG_NOWERR; | |
491 | else | |
492 | drive->dev_flags &= ~IDE_DFLAG_NOWERR; | |
493 | ||
1da177e4 | 494 | drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT; |
97100fc8 | 495 | |
1da177e4 LT |
496 | return 0; |
497 | } | |
498 | ||
be3c096e BZ |
499 | static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect) |
500 | { | |
501 | ide_task_t task; | |
502 | ||
503 | memset(&task, 0, sizeof(task)); | |
504 | task.tf.feature = feature; | |
505 | task.tf.nsect = nsect; | |
506 | task.tf.command = ATA_CMD_SET_FEATURES; | |
507 | task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; | |
508 | ||
509 | return ide_no_data_taskfile(drive, &task); | |
510 | } | |
511 | ||
3e087b57 TH |
512 | static void update_ordered(ide_drive_t *drive) |
513 | { | |
4dde4492 | 514 | u16 *id = drive->id; |
3e087b57 TH |
515 | unsigned ordered = QUEUE_ORDERED_NONE; |
516 | prepare_flush_fn *prep_fn = NULL; | |
3e087b57 | 517 | |
97100fc8 | 518 | if (drive->dev_flags & IDE_DFLAG_WCACHE) { |
3e087b57 TH |
519 | unsigned long long capacity; |
520 | int barrier; | |
521 | /* | |
522 | * We must avoid issuing commands a drive does not | |
523 | * understand or we may crash it. We check flush cache | |
524 | * is supported. We also check we have the LBA48 flush | |
525 | * cache if the drive capacity is too large. By this | |
526 | * time we have trimmed the drive capacity if LBA48 is | |
527 | * not available so we don't need to recheck that. | |
528 | */ | |
06b89518 | 529 | capacity = ide_disk_capacity(drive); |
97100fc8 BZ |
530 | barrier = ata_id_flush_enabled(id) && |
531 | (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 && | |
532 | ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 || | |
533 | capacity <= (1ULL << 28) || | |
ff2779b5 | 534 | ata_id_flush_ext_enabled(id)); |
3e087b57 TH |
535 | |
536 | printk(KERN_INFO "%s: cache flushes %ssupported\n", | |
f7ad836c | 537 | drive->name, barrier ? "" : "not "); |
3e087b57 TH |
538 | |
539 | if (barrier) { | |
540 | ordered = QUEUE_ORDERED_DRAIN_FLUSH; | |
541 | prep_fn = idedisk_prepare_flush; | |
3e087b57 TH |
542 | } |
543 | } else | |
544 | ordered = QUEUE_ORDERED_DRAIN; | |
545 | ||
546 | blk_queue_ordered(drive->queue, ordered, prep_fn); | |
3e087b57 TH |
547 | } |
548 | ||
97100fc8 | 549 | ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE); |
8185d5aa BZ |
550 | |
551 | static int set_wcache(ide_drive_t *drive, int arg) | |
1da177e4 | 552 | { |
3e087b57 | 553 | int err = 1; |
1da177e4 | 554 | |
1497943e BZ |
555 | if (arg < 0 || arg > 1) |
556 | return -EINVAL; | |
557 | ||
4b58f17d | 558 | if (ata_id_flush_enabled(drive->id)) { |
be3c096e BZ |
559 | err = ide_do_setfeature(drive, |
560 | arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0); | |
97100fc8 BZ |
561 | if (err == 0) { |
562 | if (arg) | |
563 | drive->dev_flags |= IDE_DFLAG_WCACHE; | |
564 | else | |
565 | drive->dev_flags &= ~IDE_DFLAG_WCACHE; | |
566 | } | |
3e087b57 | 567 | } |
1da177e4 | 568 | |
3e087b57 | 569 | update_ordered(drive); |
1da177e4 | 570 | |
3e087b57 | 571 | return err; |
1da177e4 LT |
572 | } |
573 | ||
98416549 | 574 | static int do_idedisk_flushcache(ide_drive_t *drive) |
1da177e4 LT |
575 | { |
576 | ide_task_t args; | |
577 | ||
578 | memset(&args, 0, sizeof(ide_task_t)); | |
ff2779b5 | 579 | if (ata_id_flush_ext_enabled(drive->id)) |
aaaade3f | 580 | args.tf.command = ATA_CMD_FLUSH_EXT; |
1da177e4 | 581 | else |
aaaade3f | 582 | args.tf.command = ATA_CMD_FLUSH; |
657cc1a8 | 583 | args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; |
9a3c49be | 584 | return ide_no_data_taskfile(drive, &args); |
1da177e4 LT |
585 | } |
586 | ||
8185d5aa BZ |
587 | ide_devset_get(acoustic, acoustic); |
588 | ||
98416549 | 589 | static int set_acoustic(ide_drive_t *drive, int arg) |
1da177e4 | 590 | { |
1497943e BZ |
591 | if (arg < 0 || arg > 254) |
592 | return -EINVAL; | |
593 | ||
be3c096e BZ |
594 | ide_do_setfeature(drive, |
595 | arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg); | |
596 | ||
1da177e4 | 597 | drive->acoustic = arg; |
be3c096e | 598 | |
1da177e4 LT |
599 | return 0; |
600 | } | |
601 | ||
97100fc8 | 602 | ide_devset_get_flag(addressing, IDE_DFLAG_LBA48); |
8185d5aa | 603 | |
1da177e4 LT |
604 | /* |
605 | * drive->addressing: | |
606 | * 0: 28-bit | |
607 | * 1: 48-bit | |
608 | * 2: 48-bit capable doing 28-bit | |
609 | */ | |
aa768773 | 610 | static int set_addressing(ide_drive_t *drive, int arg) |
1da177e4 | 611 | { |
1497943e BZ |
612 | if (arg < 0 || arg > 2) |
613 | return -EINVAL; | |
614 | ||
35c13753 BZ |
615 | if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) || |
616 | ata_id_lba48_enabled(drive->id) == 0)) | |
98416549 | 617 | return -EIO; |
942dcd85 | 618 | |
35c13753 BZ |
619 | if (arg == 2) |
620 | arg = 0; | |
621 | ||
97100fc8 BZ |
622 | if (arg) |
623 | drive->dev_flags |= IDE_DFLAG_LBA48; | |
624 | else | |
625 | drive->dev_flags &= ~IDE_DFLAG_LBA48; | |
942dcd85 | 626 | |
1da177e4 LT |
627 | return 0; |
628 | } | |
629 | ||
f8790489 BZ |
630 | ide_ext_devset_rw(acoustic, acoustic); |
631 | ide_ext_devset_rw(address, addressing); | |
632 | ide_ext_devset_rw(multcount, multcount); | |
633 | ide_ext_devset_rw(wcache, wcache); | |
92f1f8fd | 634 | |
f8790489 | 635 | ide_ext_devset_rw_sync(nowerr, nowerr); |
92f1f8fd | 636 | |
98416549 | 637 | static void idedisk_setup(ide_drive_t *drive) |
1da177e4 | 638 | { |
1e874f44 | 639 | struct ide_disk_obj *idkp = drive->driver_data; |
238e4f14 | 640 | ide_hwif_t *hwif = drive->hwif; |
4dde4492 BZ |
641 | u16 *id = drive->id; |
642 | char *m = (char *)&id[ATA_ID_PROD]; | |
1da177e4 | 643 | unsigned long long capacity; |
1da177e4 | 644 | |
1e874f44 | 645 | ide_proc_register_driver(drive, idkp->driver); |
1da177e4 | 646 | |
97100fc8 | 647 | if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) |
1da177e4 LT |
648 | return; |
649 | ||
97100fc8 | 650 | if (drive->dev_flags & IDE_DFLAG_REMOVABLE) { |
1da177e4 | 651 | /* |
98416549 | 652 | * Removable disks (eg. SYQUEST); ignore 'WD' drives |
1da177e4 | 653 | */ |
4dde4492 | 654 | if (m[0] != 'W' || m[1] != 'D') |
97100fc8 | 655 | drive->dev_flags |= IDE_DFLAG_DOORLOCKING; |
1da177e4 LT |
656 | } |
657 | ||
aa768773 | 658 | (void)set_addressing(drive, 1); |
1da177e4 | 659 | |
97100fc8 | 660 | if (drive->dev_flags & IDE_DFLAG_LBA48) { |
1da177e4 LT |
661 | int max_s = 2048; |
662 | ||
663 | if (max_s > hwif->rqsize) | |
664 | max_s = hwif->rqsize; | |
665 | ||
666 | blk_queue_max_sectors(drive->queue, max_s); | |
667 | } | |
668 | ||
98416549 BZ |
669 | printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, |
670 | drive->queue->max_sectors / 2); | |
1da177e4 LT |
671 | |
672 | /* calculate drive capacity, and select LBA if possible */ | |
98416549 | 673 | init_idedisk_capacity(drive); |
1da177e4 | 674 | |
1da177e4 LT |
675 | /* |
676 | * if possible, give fdisk access to more of the drive, | |
677 | * by correcting bios_cyls: | |
678 | */ | |
06b89518 | 679 | capacity = ide_disk_capacity(drive); |
98416549 | 680 | |
97100fc8 | 681 | if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) { |
942dcd85 | 682 | if (ata_id_lba48_enabled(drive->id)) { |
1da177e4 LT |
683 | /* compatibility */ |
684 | drive->bios_sect = 63; | |
685 | drive->bios_head = 255; | |
686 | } | |
687 | ||
688 | if (drive->bios_sect && drive->bios_head) { | |
689 | unsigned int cap0 = capacity; /* truncate to 32 bits */ | |
690 | unsigned int cylsz, cyl; | |
691 | ||
692 | if (cap0 != capacity) | |
693 | drive->bios_cyl = 65535; | |
694 | else { | |
695 | cylsz = drive->bios_sect * drive->bios_head; | |
696 | cyl = cap0 / cylsz; | |
697 | if (cyl > 65535) | |
698 | cyl = 65535; | |
699 | if (cyl > drive->bios_cyl) | |
700 | drive->bios_cyl = cyl; | |
701 | } | |
702 | } | |
703 | } | |
704 | printk(KERN_INFO "%s: %llu sectors (%llu MB)", | |
705 | drive->name, capacity, sectors_to_MB(capacity)); | |
706 | ||
707 | /* Only print cache size when it was specified */ | |
4dde4492 BZ |
708 | if (id[ATA_ID_BUF_SIZE]) |
709 | printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2); | |
1da177e4 | 710 | |
3ab7efe8 BZ |
711 | printk(KERN_CONT ", CHS=%d/%d/%d\n", |
712 | drive->bios_cyl, drive->bios_head, drive->bios_sect); | |
1da177e4 | 713 | |
1da177e4 | 714 | /* write cache enabled? */ |
8a089c66 | 715 | if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id)) |
97100fc8 | 716 | drive->dev_flags |= IDE_DFLAG_WCACHE; |
1da177e4 | 717 | |
8185d5aa | 718 | set_wcache(drive, 1); |
ae9f9f07 BZ |
719 | |
720 | if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 && | |
721 | (drive->head == 0 || drive->head > 16)) { | |
722 | printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n", | |
723 | drive->name, drive->head); | |
724 | drive->dev_flags &= ~IDE_DFLAG_ATTACH; | |
725 | } else | |
726 | drive->dev_flags |= IDE_DFLAG_ATTACH; | |
1da177e4 LT |
727 | } |
728 | ||
729 | static void ide_cacheflush_p(ide_drive_t *drive) | |
730 | { | |
97100fc8 BZ |
731 | if (ata_id_flush_enabled(drive->id) == 0 || |
732 | (drive->dev_flags & IDE_DFLAG_WCACHE) == 0) | |
1da177e4 LT |
733 | return; |
734 | ||
735 | if (do_idedisk_flushcache(drive)) | |
736 | printk(KERN_INFO "%s: wcache flush failed!\n", drive->name); | |
737 | } | |
738 | ||
4031bbe4 | 739 | static void ide_disk_remove(ide_drive_t *drive) |
1da177e4 LT |
740 | { |
741 | struct ide_disk_obj *idkp = drive->driver_data; | |
742 | struct gendisk *g = idkp->disk; | |
743 | ||
7662d046 | 744 | ide_proc_unregister_driver(drive, idkp->driver); |
8604affd | 745 | |
1da177e4 LT |
746 | del_gendisk(g); |
747 | ||
d36fef6f BZ |
748 | ide_cacheflush_p(drive); |
749 | ||
1da177e4 | 750 | ide_disk_put(idkp); |
1da177e4 LT |
751 | } |
752 | ||
753 | static void ide_disk_release(struct kref *kref) | |
754 | { | |
d7e74759 | 755 | struct ide_disk_obj *idkp = to_ide_drv(kref, ide_disk_obj); |
1da177e4 LT |
756 | ide_drive_t *drive = idkp->drive; |
757 | struct gendisk *g = idkp->disk; | |
758 | ||
759 | drive->driver_data = NULL; | |
1da177e4 LT |
760 | g->private_data = NULL; |
761 | put_disk(g); | |
762 | kfree(idkp); | |
763 | } | |
764 | ||
4031bbe4 | 765 | static int ide_disk_probe(ide_drive_t *drive); |
1da177e4 | 766 | |
0d2157f7 LT |
767 | /* |
768 | * On HPA drives the capacity needs to be | |
769 | * reinitilized on resume otherwise the disk | |
770 | * can not be used and a hard reset is required | |
771 | */ | |
772 | static void ide_disk_resume(ide_drive_t *drive) | |
773 | { | |
f41891c1 | 774 | if (ata_id_hpa_enabled(drive->id)) |
0d2157f7 LT |
775 | init_idedisk_capacity(drive); |
776 | } | |
777 | ||
4031bbe4 | 778 | static void ide_device_shutdown(ide_drive_t *drive) |
1da177e4 | 779 | { |
1da177e4 LT |
780 | #ifdef CONFIG_ALPHA |
781 | /* On Alpha, halt(8) doesn't actually turn the machine off, | |
782 | it puts you into the sort of firmware monitor. Typically, | |
783 | it's used to boot another kernel image, so it's not much | |
784 | different from reboot(8). Therefore, we don't need to | |
785 | spin down the disk in this case, especially since Alpha | |
786 | firmware doesn't handle disks in standby mode properly. | |
787 | On the other hand, it's reasonably safe to turn the power | |
788 | off when the shutdown process reaches the firmware prompt, | |
789 | as the firmware initialization takes rather long time - | |
790 | at least 10 seconds, which should be sufficient for | |
791 | the disk to expire its write cache. */ | |
792 | if (system_state != SYSTEM_POWER_OFF) { | |
793 | #else | |
794 | if (system_state == SYSTEM_RESTART) { | |
795 | #endif | |
796 | ide_cacheflush_p(drive); | |
797 | return; | |
798 | } | |
799 | ||
d12faa27 BZ |
800 | printk(KERN_INFO "Shutdown: %s\n", drive->name); |
801 | ||
4031bbe4 | 802 | drive->gendev.bus->suspend(&drive->gendev, PMSG_SUSPEND); |
1da177e4 LT |
803 | } |
804 | ||
1da177e4 | 805 | static ide_driver_t idedisk_driver = { |
1da177e4 | 806 | .gen_driver = { |
4ef3b8f4 | 807 | .owner = THIS_MODULE, |
8604affd BZ |
808 | .name = "ide-disk", |
809 | .bus = &ide_bus_type, | |
1da177e4 | 810 | }, |
4031bbe4 RK |
811 | .probe = ide_disk_probe, |
812 | .remove = ide_disk_remove, | |
0d2157f7 | 813 | .resume = ide_disk_resume, |
4031bbe4 | 814 | .shutdown = ide_device_shutdown, |
1da177e4 | 815 | .version = IDEDISK_VERSION, |
1da177e4 LT |
816 | .do_request = ide_do_rw_disk, |
817 | .end_request = ide_end_request, | |
818 | .error = __ide_error, | |
7662d046 | 819 | #ifdef CONFIG_IDE_PROC_FS |
06b89518 BZ |
820 | .proc = ide_disk_proc, |
821 | .settings = ide_disk_settings, | |
7662d046 | 822 | #endif |
1da177e4 LT |
823 | }; |
824 | ||
29ec683f BZ |
825 | static int idedisk_set_doorlock(ide_drive_t *drive, int on) |
826 | { | |
827 | ide_task_t task; | |
81ee1bb5 BZ |
828 | int ret; |
829 | ||
830 | if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) | |
831 | return 0; | |
29ec683f BZ |
832 | |
833 | memset(&task, 0, sizeof(task)); | |
aaaade3f | 834 | task.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK; |
657cc1a8 | 835 | task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; |
29ec683f | 836 | |
81ee1bb5 BZ |
837 | ret = ide_no_data_taskfile(drive, &task); |
838 | ||
839 | if (ret) | |
840 | drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; | |
841 | ||
842 | return ret; | |
29ec683f BZ |
843 | } |
844 | ||
1da177e4 LT |
845 | static int idedisk_open(struct inode *inode, struct file *filp) |
846 | { | |
847 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
848 | struct ide_disk_obj *idkp; | |
849 | ide_drive_t *drive; | |
850 | ||
98416549 BZ |
851 | idkp = ide_disk_get(disk); |
852 | if (idkp == NULL) | |
1da177e4 LT |
853 | return -ENXIO; |
854 | ||
855 | drive = idkp->drive; | |
856 | ||
c94964a4 BZ |
857 | idkp->openers++; |
858 | ||
97100fc8 | 859 | if ((drive->dev_flags & IDE_DFLAG_REMOVABLE) && idkp->openers == 1) { |
1da177e4 LT |
860 | /* |
861 | * Ignore the return code from door_lock, | |
862 | * since the open() has already succeeded, | |
863 | * and the door_lock is irrelevant at this point. | |
864 | */ | |
81ee1bb5 | 865 | idedisk_set_doorlock(drive, 1); |
099ed4c2 | 866 | check_disk_change(inode->i_bdev); |
1da177e4 LT |
867 | } |
868 | return 0; | |
869 | } | |
870 | ||
871 | static int idedisk_release(struct inode *inode, struct file *filp) | |
872 | { | |
873 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
d7e74759 | 874 | struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj); |
1da177e4 LT |
875 | ide_drive_t *drive = idkp->drive; |
876 | ||
c94964a4 | 877 | if (idkp->openers == 1) |
1da177e4 | 878 | ide_cacheflush_p(drive); |
c94964a4 | 879 | |
81ee1bb5 BZ |
880 | if ((drive->dev_flags & IDE_DFLAG_REMOVABLE) && idkp->openers == 1) |
881 | idedisk_set_doorlock(drive, 0); | |
c94964a4 BZ |
882 | |
883 | idkp->openers--; | |
1da177e4 LT |
884 | |
885 | ide_disk_put(idkp); | |
886 | ||
887 | return 0; | |
888 | } | |
889 | ||
a885c8c4 CH |
890 | static int idedisk_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
891 | { | |
d7e74759 | 892 | struct ide_disk_obj *idkp = ide_drv_g(bdev->bd_disk, ide_disk_obj); |
a885c8c4 CH |
893 | ide_drive_t *drive = idkp->drive; |
894 | ||
895 | geo->heads = drive->bios_head; | |
896 | geo->sectors = drive->bios_sect; | |
897 | geo->cylinders = (u16)drive->bios_cyl; /* truncate */ | |
898 | return 0; | |
899 | } | |
900 | ||
1da177e4 LT |
901 | static int idedisk_media_changed(struct gendisk *disk) |
902 | { | |
d7e74759 | 903 | struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj); |
1da177e4 LT |
904 | ide_drive_t *drive = idkp->drive; |
905 | ||
906 | /* do not scan partitions twice if this is a removable device */ | |
97100fc8 BZ |
907 | if (drive->dev_flags & IDE_DFLAG_ATTACH) { |
908 | drive->dev_flags &= ~IDE_DFLAG_ATTACH; | |
1da177e4 LT |
909 | return 0; |
910 | } | |
97100fc8 | 911 | |
1da177e4 | 912 | /* if removable, always assume it was changed */ |
97100fc8 | 913 | return !!(drive->dev_flags & IDE_DFLAG_REMOVABLE); |
1da177e4 LT |
914 | } |
915 | ||
916 | static int idedisk_revalidate_disk(struct gendisk *disk) | |
917 | { | |
d7e74759 | 918 | struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj); |
06b89518 | 919 | set_capacity(disk, ide_disk_capacity(idkp->drive)); |
1da177e4 LT |
920 | return 0; |
921 | } | |
922 | ||
923 | static struct block_device_operations idedisk_ops = { | |
98416549 BZ |
924 | .owner = THIS_MODULE, |
925 | .open = idedisk_open, | |
926 | .release = idedisk_release, | |
f8790489 | 927 | .ioctl = ide_disk_ioctl, |
98416549 BZ |
928 | .getgeo = idedisk_getgeo, |
929 | .media_changed = idedisk_media_changed, | |
930 | .revalidate_disk = idedisk_revalidate_disk | |
1da177e4 LT |
931 | }; |
932 | ||
933 | MODULE_DESCRIPTION("ATA DISK Driver"); | |
934 | ||
4031bbe4 | 935 | static int ide_disk_probe(ide_drive_t *drive) |
1da177e4 LT |
936 | { |
937 | struct ide_disk_obj *idkp; | |
938 | struct gendisk *g; | |
939 | ||
940 | /* strstr("foo", "") is non-NULL */ | |
941 | if (!strstr("ide-disk", drive->driver_req)) | |
942 | goto failed; | |
2a924662 | 943 | |
1da177e4 LT |
944 | if (drive->media != ide_disk) |
945 | goto failed; | |
946 | ||
f5e3c2fa | 947 | idkp = kzalloc(sizeof(*idkp), GFP_KERNEL); |
1da177e4 LT |
948 | if (!idkp) |
949 | goto failed; | |
950 | ||
689d6fac | 951 | g = alloc_disk_node(IDE_DISK_MINORS, hwif_to_node(drive->hwif)); |
1da177e4 LT |
952 | if (!g) |
953 | goto out_free_idkp; | |
954 | ||
955 | ide_init_disk(g, drive); | |
956 | ||
1da177e4 LT |
957 | kref_init(&idkp->kref); |
958 | ||
959 | idkp->drive = drive; | |
960 | idkp->driver = &idedisk_driver; | |
961 | idkp->disk = g; | |
962 | ||
963 | g->private_data = &idkp->driver; | |
964 | ||
965 | drive->driver_data = idkp; | |
966 | ||
1da177e4 | 967 | idedisk_setup(drive); |
ae9f9f07 BZ |
968 | |
969 | set_capacity(g, ide_disk_capacity(drive)); | |
8604affd | 970 | |
f615b48c | 971 | g->minors = IDE_DISK_MINORS; |
1da177e4 | 972 | g->driverfs_dev = &drive->gendev; |
689d6fac | 973 | g->flags |= GENHD_FL_EXT_DEVT; |
97100fc8 BZ |
974 | if (drive->dev_flags & IDE_DFLAG_REMOVABLE) |
975 | g->flags = GENHD_FL_REMOVABLE; | |
1da177e4 LT |
976 | g->fops = &idedisk_ops; |
977 | add_disk(g); | |
978 | return 0; | |
979 | ||
1da177e4 LT |
980 | out_free_idkp: |
981 | kfree(idkp); | |
982 | failed: | |
8604affd | 983 | return -ENODEV; |
1da177e4 LT |
984 | } |
985 | ||
98416549 | 986 | static void __exit idedisk_exit(void) |
1da177e4 | 987 | { |
8604affd | 988 | driver_unregister(&idedisk_driver.gen_driver); |
1da177e4 LT |
989 | } |
990 | ||
17514e8a | 991 | static int __init idedisk_init(void) |
1da177e4 | 992 | { |
8604affd | 993 | return driver_register(&idedisk_driver.gen_driver); |
1da177e4 LT |
994 | } |
995 | ||
263756ec | 996 | MODULE_ALIAS("ide:*m-disk*"); |
f8790489 | 997 | MODULE_ALIAS("ide-disk"); |
1da177e4 LT |
998 | module_init(idedisk_init); |
999 | module_exit(idedisk_exit); | |
1000 | MODULE_LICENSE("GPL"); |