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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. | |
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 | |
d6e05edc | 40 | * Version 1.17 do flush on standby, do flush on ATA < ATA6 |
1da177e4 LT |
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 | ||
1da177e4 LT |
50 | #include <linux/module.h> |
51 | #include <linux/types.h> | |
52 | #include <linux/string.h> | |
53 | #include <linux/kernel.h> | |
54 | #include <linux/timer.h> | |
55 | #include <linux/mm.h> | |
56 | #include <linux/interrupt.h> | |
57 | #include <linux/major.h> | |
58 | #include <linux/errno.h> | |
59 | #include <linux/genhd.h> | |
60 | #include <linux/slab.h> | |
61 | #include <linux/delay.h> | |
cf8b8975 | 62 | #include <linux/mutex.h> |
2bfb646c | 63 | #include <linux/leds.h> |
1da177e4 LT |
64 | |
65 | #define _IDE_DISK | |
66 | ||
67 | #include <linux/ide.h> | |
68 | ||
69 | #include <asm/byteorder.h> | |
70 | #include <asm/irq.h> | |
71 | #include <asm/uaccess.h> | |
72 | #include <asm/io.h> | |
73 | #include <asm/div64.h> | |
74 | ||
75 | struct ide_disk_obj { | |
76 | ide_drive_t *drive; | |
77 | ide_driver_t *driver; | |
78 | struct gendisk *disk; | |
79 | struct kref kref; | |
80 | }; | |
81 | ||
cf8b8975 | 82 | static DEFINE_MUTEX(idedisk_ref_mutex); |
1da177e4 LT |
83 | |
84 | #define to_ide_disk(obj) container_of(obj, struct ide_disk_obj, kref) | |
85 | ||
86 | #define ide_disk_g(disk) \ | |
87 | container_of((disk)->private_data, struct ide_disk_obj, driver) | |
88 | ||
89 | static struct ide_disk_obj *ide_disk_get(struct gendisk *disk) | |
90 | { | |
91 | struct ide_disk_obj *idkp = NULL; | |
92 | ||
cf8b8975 | 93 | mutex_lock(&idedisk_ref_mutex); |
1da177e4 LT |
94 | idkp = ide_disk_g(disk); |
95 | if (idkp) | |
96 | kref_get(&idkp->kref); | |
cf8b8975 | 97 | mutex_unlock(&idedisk_ref_mutex); |
1da177e4 LT |
98 | return idkp; |
99 | } | |
100 | ||
101 | static void ide_disk_release(struct kref *); | |
102 | ||
103 | static void ide_disk_put(struct ide_disk_obj *idkp) | |
104 | { | |
cf8b8975 | 105 | mutex_lock(&idedisk_ref_mutex); |
1da177e4 | 106 | kref_put(&idkp->kref, ide_disk_release); |
cf8b8975 | 107 | mutex_unlock(&idedisk_ref_mutex); |
1da177e4 LT |
108 | } |
109 | ||
110 | /* | |
111 | * lba_capacity_is_ok() performs a sanity check on the claimed "lba_capacity" | |
112 | * value for this drive (from its reported identification information). | |
113 | * | |
114 | * Returns: 1 if lba_capacity looks sensible | |
115 | * 0 otherwise | |
116 | * | |
117 | * It is called only once for each drive. | |
118 | */ | |
119 | static int lba_capacity_is_ok (struct hd_driveid *id) | |
120 | { | |
121 | unsigned long lba_sects, chs_sects, head, tail; | |
122 | ||
6efd9360 AC |
123 | /* No non-LBA info .. so valid! */ |
124 | if (id->cyls == 0) | |
125 | return 1; | |
126 | ||
1da177e4 LT |
127 | /* |
128 | * The ATA spec tells large drives to return | |
129 | * C/H/S = 16383/16/63 independent of their size. | |
130 | * Some drives can be jumpered to use 15 heads instead of 16. | |
131 | * Some drives can be jumpered to use 4092 cyls instead of 16383. | |
132 | */ | |
133 | if ((id->cyls == 16383 | |
134 | || (id->cyls == 4092 && id->cur_cyls == 16383)) && | |
135 | id->sectors == 63 && | |
136 | (id->heads == 15 || id->heads == 16) && | |
137 | (id->lba_capacity >= 16383*63*id->heads)) | |
138 | return 1; | |
139 | ||
140 | lba_sects = id->lba_capacity; | |
141 | chs_sects = id->cyls * id->heads * id->sectors; | |
142 | ||
143 | /* perform a rough sanity check on lba_sects: within 10% is OK */ | |
144 | if ((lba_sects - chs_sects) < chs_sects/10) | |
145 | return 1; | |
146 | ||
147 | /* some drives have the word order reversed */ | |
148 | head = ((lba_sects >> 16) & 0xffff); | |
149 | tail = (lba_sects & 0xffff); | |
150 | lba_sects = (head | (tail << 16)); | |
151 | if ((lba_sects - chs_sects) < chs_sects/10) { | |
152 | id->lba_capacity = lba_sects; | |
153 | return 1; /* lba_capacity is (now) good */ | |
154 | } | |
155 | ||
156 | return 0; /* lba_capacity value may be bad */ | |
157 | } | |
158 | ||
159 | /* | |
160 | * __ide_do_rw_disk() issues READ and WRITE commands to a disk, | |
161 | * using LBA if supported, or CHS otherwise, to address sectors. | |
162 | */ | |
163 | static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq, sector_t block) | |
164 | { | |
165 | ide_hwif_t *hwif = HWIF(drive); | |
166 | unsigned int dma = drive->using_dma; | |
167 | u8 lba48 = (drive->addressing == 1) ? 1 : 0; | |
168 | task_ioreg_t command = WIN_NOP; | |
169 | ata_nsector_t nsectors; | |
170 | ||
171 | nsectors.all = (u16) rq->nr_sectors; | |
172 | ||
173 | if (hwif->no_lba48_dma && lba48 && dma) { | |
174 | if (block + rq->nr_sectors > 1ULL << 28) | |
175 | dma = 0; | |
176 | else | |
177 | lba48 = 0; | |
178 | } | |
179 | ||
180 | if (!dma) { | |
181 | ide_init_sg_cmd(drive, rq); | |
182 | ide_map_sg(drive, rq); | |
183 | } | |
184 | ||
185 | if (IDE_CONTROL_REG) | |
186 | hwif->OUTB(drive->ctl, IDE_CONTROL_REG); | |
187 | ||
188 | /* FIXME: SELECT_MASK(drive, 0) ? */ | |
189 | ||
190 | if (drive->select.b.lba) { | |
191 | if (lba48) { | |
192 | task_ioreg_t tasklets[10]; | |
193 | ||
c2f8311d MR |
194 | pr_debug("%s: LBA=0x%012llx\n", drive->name, |
195 | (unsigned long long)block); | |
1da177e4 LT |
196 | |
197 | tasklets[0] = 0; | |
198 | tasklets[1] = 0; | |
199 | tasklets[2] = nsectors.b.low; | |
200 | tasklets[3] = nsectors.b.high; | |
201 | tasklets[4] = (task_ioreg_t) block; | |
202 | tasklets[5] = (task_ioreg_t) (block>>8); | |
203 | tasklets[6] = (task_ioreg_t) (block>>16); | |
204 | tasklets[7] = (task_ioreg_t) (block>>24); | |
205 | if (sizeof(block) == 4) { | |
206 | tasklets[8] = (task_ioreg_t) 0; | |
207 | tasklets[9] = (task_ioreg_t) 0; | |
208 | } else { | |
209 | tasklets[8] = (task_ioreg_t)((u64)block >> 32); | |
210 | tasklets[9] = (task_ioreg_t)((u64)block >> 40); | |
211 | } | |
212 | #ifdef DEBUG | |
213 | printk("%s: 0x%02x%02x 0x%02x%02x%02x%02x%02x%02x\n", | |
214 | drive->name, tasklets[3], tasklets[2], | |
215 | tasklets[9], tasklets[8], tasklets[7], | |
216 | tasklets[6], tasklets[5], tasklets[4]); | |
217 | #endif | |
218 | hwif->OUTB(tasklets[1], IDE_FEATURE_REG); | |
219 | hwif->OUTB(tasklets[3], IDE_NSECTOR_REG); | |
220 | hwif->OUTB(tasklets[7], IDE_SECTOR_REG); | |
221 | hwif->OUTB(tasklets[8], IDE_LCYL_REG); | |
222 | hwif->OUTB(tasklets[9], IDE_HCYL_REG); | |
223 | ||
224 | hwif->OUTB(tasklets[0], IDE_FEATURE_REG); | |
225 | hwif->OUTB(tasklets[2], IDE_NSECTOR_REG); | |
226 | hwif->OUTB(tasklets[4], IDE_SECTOR_REG); | |
227 | hwif->OUTB(tasklets[5], IDE_LCYL_REG); | |
228 | hwif->OUTB(tasklets[6], IDE_HCYL_REG); | |
229 | hwif->OUTB(0x00|drive->select.all,IDE_SELECT_REG); | |
230 | } else { | |
231 | hwif->OUTB(0x00, IDE_FEATURE_REG); | |
232 | hwif->OUTB(nsectors.b.low, IDE_NSECTOR_REG); | |
233 | hwif->OUTB(block, IDE_SECTOR_REG); | |
234 | hwif->OUTB(block>>=8, IDE_LCYL_REG); | |
235 | hwif->OUTB(block>>=8, IDE_HCYL_REG); | |
236 | hwif->OUTB(((block>>8)&0x0f)|drive->select.all,IDE_SELECT_REG); | |
237 | } | |
238 | } else { | |
239 | unsigned int sect,head,cyl,track; | |
240 | track = (int)block / drive->sect; | |
241 | sect = (int)block % drive->sect + 1; | |
242 | hwif->OUTB(sect, IDE_SECTOR_REG); | |
243 | head = track % drive->head; | |
244 | cyl = track / drive->head; | |
245 | ||
246 | pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect); | |
247 | ||
248 | hwif->OUTB(0x00, IDE_FEATURE_REG); | |
249 | hwif->OUTB(nsectors.b.low, IDE_NSECTOR_REG); | |
250 | hwif->OUTB(cyl, IDE_LCYL_REG); | |
251 | hwif->OUTB(cyl>>8, IDE_HCYL_REG); | |
252 | hwif->OUTB(head|drive->select.all,IDE_SELECT_REG); | |
253 | } | |
254 | ||
255 | if (dma) { | |
256 | if (!hwif->dma_setup(drive)) { | |
257 | if (rq_data_dir(rq)) { | |
258 | command = lba48 ? WIN_WRITEDMA_EXT : WIN_WRITEDMA; | |
259 | if (drive->vdma) | |
260 | command = lba48 ? WIN_WRITE_EXT: WIN_WRITE; | |
261 | } else { | |
262 | command = lba48 ? WIN_READDMA_EXT : WIN_READDMA; | |
263 | if (drive->vdma) | |
264 | command = lba48 ? WIN_READ_EXT: WIN_READ; | |
265 | } | |
266 | hwif->dma_exec_cmd(drive, command); | |
267 | hwif->dma_start(drive); | |
268 | return ide_started; | |
269 | } | |
270 | /* fallback to PIO */ | |
271 | ide_init_sg_cmd(drive, rq); | |
272 | } | |
273 | ||
274 | if (rq_data_dir(rq) == READ) { | |
275 | ||
276 | if (drive->mult_count) { | |
277 | hwif->data_phase = TASKFILE_MULTI_IN; | |
278 | command = lba48 ? WIN_MULTREAD_EXT : WIN_MULTREAD; | |
279 | } else { | |
280 | hwif->data_phase = TASKFILE_IN; | |
281 | command = lba48 ? WIN_READ_EXT : WIN_READ; | |
282 | } | |
283 | ||
284 | ide_execute_command(drive, command, &task_in_intr, WAIT_CMD, NULL); | |
285 | return ide_started; | |
286 | } else { | |
287 | if (drive->mult_count) { | |
288 | hwif->data_phase = TASKFILE_MULTI_OUT; | |
289 | command = lba48 ? WIN_MULTWRITE_EXT : WIN_MULTWRITE; | |
290 | } else { | |
291 | hwif->data_phase = TASKFILE_OUT; | |
292 | command = lba48 ? WIN_WRITE_EXT : WIN_WRITE; | |
293 | } | |
294 | ||
295 | /* FIXME: ->OUTBSYNC ? */ | |
296 | hwif->OUTB(command, IDE_COMMAND_REG); | |
297 | ||
298 | return pre_task_out_intr(drive, rq); | |
299 | } | |
300 | } | |
301 | ||
302 | /* | |
303 | * 268435455 == 137439 MB or 28bit limit | |
304 | * 320173056 == 163929 MB or 48bit addressing | |
305 | * 1073741822 == 549756 MB or 48bit addressing fake drive | |
306 | */ | |
307 | ||
308 | static ide_startstop_t ide_do_rw_disk (ide_drive_t *drive, struct request *rq, sector_t block) | |
309 | { | |
310 | ide_hwif_t *hwif = HWIF(drive); | |
311 | ||
312 | BUG_ON(drive->blocked); | |
313 | ||
314 | if (!blk_fs_request(rq)) { | |
315 | blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command"); | |
316 | ide_end_request(drive, 0, 0); | |
317 | return ide_stopped; | |
318 | } | |
319 | ||
2bfb646c RP |
320 | ledtrig_ide_activity(); |
321 | ||
1da177e4 LT |
322 | pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n", |
323 | drive->name, rq_data_dir(rq) == READ ? "read" : "writ", | |
c2f8311d MR |
324 | (unsigned long long)block, rq->nr_sectors, |
325 | (unsigned long)rq->buffer); | |
1da177e4 LT |
326 | |
327 | if (hwif->rw_disk) | |
328 | hwif->rw_disk(drive, rq); | |
329 | ||
330 | return __ide_do_rw_disk(drive, rq, block); | |
331 | } | |
332 | ||
333 | /* | |
334 | * Queries for true maximum capacity of the drive. | |
335 | * Returns maximum LBA address (> 0) of the drive, 0 if failed. | |
336 | */ | |
337 | static unsigned long idedisk_read_native_max_address(ide_drive_t *drive) | |
338 | { | |
339 | ide_task_t args; | |
340 | unsigned long addr = 0; | |
341 | ||
342 | /* Create IDE/ATA command request structure */ | |
343 | memset(&args, 0, sizeof(ide_task_t)); | |
344 | args.tfRegister[IDE_SELECT_OFFSET] = 0x40; | |
345 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_READ_NATIVE_MAX; | |
346 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
347 | args.handler = &task_no_data_intr; | |
348 | /* submit command request */ | |
349 | ide_raw_taskfile(drive, &args, NULL); | |
350 | ||
351 | /* if OK, compute maximum address value */ | |
352 | if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) { | |
353 | addr = ((args.tfRegister[IDE_SELECT_OFFSET] & 0x0f) << 24) | |
354 | | ((args.tfRegister[ IDE_HCYL_OFFSET] ) << 16) | |
355 | | ((args.tfRegister[ IDE_LCYL_OFFSET] ) << 8) | |
356 | | ((args.tfRegister[IDE_SECTOR_OFFSET] )); | |
357 | addr++; /* since the return value is (maxlba - 1), we add 1 */ | |
358 | } | |
359 | return addr; | |
360 | } | |
361 | ||
362 | static unsigned long long idedisk_read_native_max_address_ext(ide_drive_t *drive) | |
363 | { | |
364 | ide_task_t args; | |
365 | unsigned long long addr = 0; | |
366 | ||
367 | /* Create IDE/ATA command request structure */ | |
368 | memset(&args, 0, sizeof(ide_task_t)); | |
369 | ||
370 | args.tfRegister[IDE_SELECT_OFFSET] = 0x40; | |
371 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_READ_NATIVE_MAX_EXT; | |
372 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
373 | args.handler = &task_no_data_intr; | |
374 | /* submit command request */ | |
375 | ide_raw_taskfile(drive, &args, NULL); | |
376 | ||
377 | /* if OK, compute maximum address value */ | |
378 | if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) { | |
379 | u32 high = (args.hobRegister[IDE_HCYL_OFFSET] << 16) | | |
380 | (args.hobRegister[IDE_LCYL_OFFSET] << 8) | | |
381 | args.hobRegister[IDE_SECTOR_OFFSET]; | |
382 | u32 low = ((args.tfRegister[IDE_HCYL_OFFSET])<<16) | | |
383 | ((args.tfRegister[IDE_LCYL_OFFSET])<<8) | | |
384 | (args.tfRegister[IDE_SECTOR_OFFSET]); | |
385 | addr = ((__u64)high << 24) | low; | |
386 | addr++; /* since the return value is (maxlba - 1), we add 1 */ | |
387 | } | |
388 | return addr; | |
389 | } | |
390 | ||
391 | /* | |
392 | * Sets maximum virtual LBA address of the drive. | |
393 | * Returns new maximum virtual LBA address (> 0) or 0 on failure. | |
394 | */ | |
395 | static unsigned long idedisk_set_max_address(ide_drive_t *drive, unsigned long addr_req) | |
396 | { | |
397 | ide_task_t args; | |
398 | unsigned long addr_set = 0; | |
399 | ||
400 | addr_req--; | |
401 | /* Create IDE/ATA command request structure */ | |
402 | memset(&args, 0, sizeof(ide_task_t)); | |
403 | args.tfRegister[IDE_SECTOR_OFFSET] = ((addr_req >> 0) & 0xff); | |
404 | args.tfRegister[IDE_LCYL_OFFSET] = ((addr_req >> 8) & 0xff); | |
405 | args.tfRegister[IDE_HCYL_OFFSET] = ((addr_req >> 16) & 0xff); | |
406 | args.tfRegister[IDE_SELECT_OFFSET] = ((addr_req >> 24) & 0x0f) | 0x40; | |
407 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SET_MAX; | |
408 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
409 | args.handler = &task_no_data_intr; | |
410 | /* submit command request */ | |
411 | ide_raw_taskfile(drive, &args, NULL); | |
412 | /* if OK, read new maximum address value */ | |
413 | if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) { | |
414 | addr_set = ((args.tfRegister[IDE_SELECT_OFFSET] & 0x0f) << 24) | |
415 | | ((args.tfRegister[ IDE_HCYL_OFFSET] ) << 16) | |
416 | | ((args.tfRegister[ IDE_LCYL_OFFSET] ) << 8) | |
417 | | ((args.tfRegister[IDE_SECTOR_OFFSET] )); | |
418 | addr_set++; | |
419 | } | |
420 | return addr_set; | |
421 | } | |
422 | ||
423 | static unsigned long long idedisk_set_max_address_ext(ide_drive_t *drive, unsigned long long addr_req) | |
424 | { | |
425 | ide_task_t args; | |
426 | unsigned long long addr_set = 0; | |
427 | ||
428 | addr_req--; | |
429 | /* Create IDE/ATA command request structure */ | |
430 | memset(&args, 0, sizeof(ide_task_t)); | |
431 | args.tfRegister[IDE_SECTOR_OFFSET] = ((addr_req >> 0) & 0xff); | |
432 | args.tfRegister[IDE_LCYL_OFFSET] = ((addr_req >>= 8) & 0xff); | |
433 | args.tfRegister[IDE_HCYL_OFFSET] = ((addr_req >>= 8) & 0xff); | |
434 | args.tfRegister[IDE_SELECT_OFFSET] = 0x40; | |
435 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SET_MAX_EXT; | |
436 | args.hobRegister[IDE_SECTOR_OFFSET] = (addr_req >>= 8) & 0xff; | |
437 | args.hobRegister[IDE_LCYL_OFFSET] = (addr_req >>= 8) & 0xff; | |
438 | args.hobRegister[IDE_HCYL_OFFSET] = (addr_req >>= 8) & 0xff; | |
439 | args.hobRegister[IDE_SELECT_OFFSET] = 0x40; | |
440 | args.hobRegister[IDE_CONTROL_OFFSET_HOB]= (drive->ctl|0x80); | |
441 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
442 | args.handler = &task_no_data_intr; | |
443 | /* submit command request */ | |
444 | ide_raw_taskfile(drive, &args, NULL); | |
445 | /* if OK, compute maximum address value */ | |
446 | if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) { | |
447 | u32 high = (args.hobRegister[IDE_HCYL_OFFSET] << 16) | | |
448 | (args.hobRegister[IDE_LCYL_OFFSET] << 8) | | |
449 | args.hobRegister[IDE_SECTOR_OFFSET]; | |
450 | u32 low = ((args.tfRegister[IDE_HCYL_OFFSET])<<16) | | |
451 | ((args.tfRegister[IDE_LCYL_OFFSET])<<8) | | |
452 | (args.tfRegister[IDE_SECTOR_OFFSET]); | |
453 | addr_set = ((__u64)high << 24) | low; | |
454 | addr_set++; | |
455 | } | |
456 | return addr_set; | |
457 | } | |
458 | ||
459 | static unsigned long long sectors_to_MB(unsigned long long n) | |
460 | { | |
461 | n <<= 9; /* make it bytes */ | |
462 | do_div(n, 1000000); /* make it MB */ | |
463 | return n; | |
464 | } | |
465 | ||
466 | /* | |
467 | * Bits 10 of command_set_1 and cfs_enable_1 must be equal, | |
468 | * so on non-buggy drives we need test only one. | |
469 | * However, we should also check whether these fields are valid. | |
470 | */ | |
471 | static inline int idedisk_supports_hpa(const struct hd_driveid *id) | |
472 | { | |
473 | return (id->command_set_1 & 0x0400) && (id->cfs_enable_1 & 0x0400); | |
474 | } | |
475 | ||
476 | /* | |
477 | * The same here. | |
478 | */ | |
479 | static inline int idedisk_supports_lba48(const struct hd_driveid *id) | |
480 | { | |
481 | return (id->command_set_2 & 0x0400) && (id->cfs_enable_2 & 0x0400) | |
482 | && id->lba_capacity_2; | |
483 | } | |
484 | ||
858119e1 | 485 | static void idedisk_check_hpa(ide_drive_t *drive) |
1da177e4 LT |
486 | { |
487 | unsigned long long capacity, set_max; | |
488 | int lba48 = idedisk_supports_lba48(drive->id); | |
489 | ||
490 | capacity = drive->capacity64; | |
491 | if (lba48) | |
492 | set_max = idedisk_read_native_max_address_ext(drive); | |
493 | else | |
494 | set_max = idedisk_read_native_max_address(drive); | |
495 | ||
496 | if (set_max <= capacity) | |
497 | return; | |
498 | ||
499 | printk(KERN_INFO "%s: Host Protected Area detected.\n" | |
500 | "\tcurrent capacity is %llu sectors (%llu MB)\n" | |
501 | "\tnative capacity is %llu sectors (%llu MB)\n", | |
502 | drive->name, | |
503 | capacity, sectors_to_MB(capacity), | |
504 | set_max, sectors_to_MB(set_max)); | |
505 | ||
506 | if (lba48) | |
507 | set_max = idedisk_set_max_address_ext(drive, set_max); | |
508 | else | |
509 | set_max = idedisk_set_max_address(drive, set_max); | |
510 | if (set_max) { | |
511 | drive->capacity64 = set_max; | |
512 | printk(KERN_INFO "%s: Host Protected Area disabled.\n", | |
513 | drive->name); | |
514 | } | |
515 | } | |
516 | ||
517 | /* | |
518 | * Compute drive->capacity, the full capacity of the drive | |
519 | * Called with drive->id != NULL. | |
520 | * | |
521 | * To compute capacity, this uses either of | |
522 | * | |
523 | * 1. CHS value set by user (whatever user sets will be trusted) | |
524 | * 2. LBA value from target drive (require new ATA feature) | |
525 | * 3. LBA value from system BIOS (new one is OK, old one may break) | |
526 | * 4. CHS value from system BIOS (traditional style) | |
527 | * | |
528 | * in above order (i.e., if value of higher priority is available, | |
529 | * reset will be ignored). | |
530 | */ | |
531 | static void init_idedisk_capacity (ide_drive_t *drive) | |
532 | { | |
533 | struct hd_driveid *id = drive->id; | |
534 | /* | |
535 | * If this drive supports the Host Protected Area feature set, | |
536 | * then we may need to change our opinion about the drive's capacity. | |
537 | */ | |
538 | int hpa = idedisk_supports_hpa(id); | |
539 | ||
540 | if (idedisk_supports_lba48(id)) { | |
541 | /* drive speaks 48-bit LBA */ | |
542 | drive->select.b.lba = 1; | |
543 | drive->capacity64 = id->lba_capacity_2; | |
544 | if (hpa) | |
545 | idedisk_check_hpa(drive); | |
546 | } else if ((id->capability & 2) && lba_capacity_is_ok(id)) { | |
547 | /* drive speaks 28-bit LBA */ | |
548 | drive->select.b.lba = 1; | |
549 | drive->capacity64 = id->lba_capacity; | |
550 | if (hpa) | |
551 | idedisk_check_hpa(drive); | |
552 | } else { | |
553 | /* drive speaks boring old 28-bit CHS */ | |
554 | drive->capacity64 = drive->cyl * drive->head * drive->sect; | |
555 | } | |
556 | } | |
557 | ||
558 | static sector_t idedisk_capacity (ide_drive_t *drive) | |
559 | { | |
560 | return drive->capacity64 - drive->sect0; | |
561 | } | |
562 | ||
563 | #ifdef CONFIG_PROC_FS | |
564 | ||
565 | static int smart_enable(ide_drive_t *drive) | |
566 | { | |
567 | ide_task_t args; | |
568 | ||
569 | memset(&args, 0, sizeof(ide_task_t)); | |
570 | args.tfRegister[IDE_FEATURE_OFFSET] = SMART_ENABLE; | |
571 | args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS; | |
572 | args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS; | |
573 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART; | |
574 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
575 | args.handler = &task_no_data_intr; | |
576 | return ide_raw_taskfile(drive, &args, NULL); | |
577 | } | |
578 | ||
579 | static int get_smart_values(ide_drive_t *drive, u8 *buf) | |
580 | { | |
581 | ide_task_t args; | |
582 | ||
583 | memset(&args, 0, sizeof(ide_task_t)); | |
584 | args.tfRegister[IDE_FEATURE_OFFSET] = SMART_READ_VALUES; | |
585 | args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01; | |
586 | args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS; | |
587 | args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS; | |
588 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART; | |
589 | args.command_type = IDE_DRIVE_TASK_IN; | |
590 | args.data_phase = TASKFILE_IN; | |
591 | args.handler = &task_in_intr; | |
592 | (void) smart_enable(drive); | |
593 | return ide_raw_taskfile(drive, &args, buf); | |
594 | } | |
595 | ||
596 | static int get_smart_thresholds(ide_drive_t *drive, u8 *buf) | |
597 | { | |
598 | ide_task_t args; | |
599 | memset(&args, 0, sizeof(ide_task_t)); | |
600 | args.tfRegister[IDE_FEATURE_OFFSET] = SMART_READ_THRESHOLDS; | |
601 | args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01; | |
602 | args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS; | |
603 | args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS; | |
604 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART; | |
605 | args.command_type = IDE_DRIVE_TASK_IN; | |
606 | args.data_phase = TASKFILE_IN; | |
607 | args.handler = &task_in_intr; | |
608 | (void) smart_enable(drive); | |
609 | return ide_raw_taskfile(drive, &args, buf); | |
610 | } | |
611 | ||
612 | static int proc_idedisk_read_cache | |
613 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
614 | { | |
615 | ide_drive_t *drive = (ide_drive_t *) data; | |
616 | char *out = page; | |
617 | int len; | |
618 | ||
619 | if (drive->id_read) | |
620 | len = sprintf(out,"%i\n", drive->id->buf_size / 2); | |
621 | else | |
622 | len = sprintf(out,"(none)\n"); | |
623 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
624 | } | |
625 | ||
626 | static int proc_idedisk_read_capacity | |
627 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
628 | { | |
629 | ide_drive_t*drive = (ide_drive_t *)data; | |
630 | int len; | |
631 | ||
632 | len = sprintf(page,"%llu\n", (long long)idedisk_capacity(drive)); | |
633 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
634 | } | |
635 | ||
636 | static int proc_idedisk_read_smart_thresholds | |
637 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
638 | { | |
639 | ide_drive_t *drive = (ide_drive_t *)data; | |
640 | int len = 0, i = 0; | |
641 | ||
642 | if (!get_smart_thresholds(drive, page)) { | |
643 | unsigned short *val = (unsigned short *) page; | |
644 | char *out = ((char *)val) + (SECTOR_WORDS * 4); | |
645 | page = out; | |
646 | do { | |
647 | out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n'); | |
648 | val += 1; | |
649 | } while (i < (SECTOR_WORDS * 2)); | |
650 | len = out - page; | |
651 | } | |
652 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
653 | } | |
654 | ||
655 | static int proc_idedisk_read_smart_values | |
656 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
657 | { | |
658 | ide_drive_t *drive = (ide_drive_t *)data; | |
659 | int len = 0, i = 0; | |
660 | ||
661 | if (!get_smart_values(drive, page)) { | |
662 | unsigned short *val = (unsigned short *) page; | |
663 | char *out = ((char *)val) + (SECTOR_WORDS * 4); | |
664 | page = out; | |
665 | do { | |
666 | out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n'); | |
667 | val += 1; | |
668 | } while (i < (SECTOR_WORDS * 2)); | |
669 | len = out - page; | |
670 | } | |
671 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
672 | } | |
673 | ||
674 | static ide_proc_entry_t idedisk_proc[] = { | |
675 | { "cache", S_IFREG|S_IRUGO, proc_idedisk_read_cache, NULL }, | |
676 | { "capacity", S_IFREG|S_IRUGO, proc_idedisk_read_capacity, NULL }, | |
677 | { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, | |
678 | { "smart_values", S_IFREG|S_IRUSR, proc_idedisk_read_smart_values, NULL }, | |
679 | { "smart_thresholds", S_IFREG|S_IRUSR, proc_idedisk_read_smart_thresholds, NULL }, | |
680 | { NULL, 0, NULL, NULL } | |
681 | }; | |
682 | ||
683 | #else | |
684 | ||
685 | #define idedisk_proc NULL | |
686 | ||
687 | #endif /* CONFIG_PROC_FS */ | |
688 | ||
3e087b57 | 689 | static void idedisk_prepare_flush(request_queue_t *q, struct request *rq) |
1da177e4 LT |
690 | { |
691 | ide_drive_t *drive = q->queuedata; | |
692 | ||
1da177e4 LT |
693 | memset(rq->cmd, 0, sizeof(rq->cmd)); |
694 | ||
695 | if (ide_id_has_flush_cache_ext(drive->id) && | |
696 | (drive->capacity64 >= (1UL << 28))) | |
697 | rq->cmd[0] = WIN_FLUSH_CACHE_EXT; | |
698 | else | |
699 | rq->cmd[0] = WIN_FLUSH_CACHE; | |
700 | ||
701 | ||
3e087b57 | 702 | rq->flags |= REQ_DRIVE_TASK; |
1da177e4 | 703 | rq->buffer = rq->cmd; |
1da177e4 LT |
704 | } |
705 | ||
706 | static int idedisk_issue_flush(request_queue_t *q, struct gendisk *disk, | |
707 | sector_t *error_sector) | |
708 | { | |
709 | ide_drive_t *drive = q->queuedata; | |
710 | struct request *rq; | |
711 | int ret; | |
712 | ||
713 | if (!drive->wcache) | |
714 | return 0; | |
715 | ||
716 | rq = blk_get_request(q, WRITE, __GFP_WAIT); | |
717 | ||
718 | idedisk_prepare_flush(q, rq); | |
719 | ||
994ca9a1 | 720 | ret = blk_execute_rq(q, disk, rq, 0); |
1da177e4 LT |
721 | |
722 | /* | |
723 | * if we failed and caller wants error offset, get it | |
724 | */ | |
725 | if (ret && error_sector) | |
726 | *error_sector = ide_get_error_location(drive, rq->cmd); | |
727 | ||
728 | blk_put_request(rq); | |
729 | return ret; | |
730 | } | |
731 | ||
732 | /* | |
733 | * This is tightly woven into the driver->do_special can not touch. | |
734 | * DON'T do it again until a total personality rewrite is committed. | |
735 | */ | |
736 | static int set_multcount(ide_drive_t *drive, int arg) | |
737 | { | |
738 | struct request rq; | |
739 | ||
740 | if (drive->special.b.set_multmode) | |
741 | return -EBUSY; | |
742 | ide_init_drive_cmd (&rq); | |
743 | rq.flags = REQ_DRIVE_CMD; | |
744 | drive->mult_req = arg; | |
745 | drive->special.b.set_multmode = 1; | |
746 | (void) ide_do_drive_cmd (drive, &rq, ide_wait); | |
747 | return (drive->mult_count == arg) ? 0 : -EIO; | |
748 | } | |
749 | ||
750 | static int set_nowerr(ide_drive_t *drive, int arg) | |
751 | { | |
752 | if (ide_spin_wait_hwgroup(drive)) | |
753 | return -EBUSY; | |
754 | drive->nowerr = arg; | |
755 | drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT; | |
756 | spin_unlock_irq(&ide_lock); | |
757 | return 0; | |
758 | } | |
759 | ||
3e087b57 TH |
760 | static void update_ordered(ide_drive_t *drive) |
761 | { | |
762 | struct hd_driveid *id = drive->id; | |
763 | unsigned ordered = QUEUE_ORDERED_NONE; | |
764 | prepare_flush_fn *prep_fn = NULL; | |
765 | issue_flush_fn *issue_fn = NULL; | |
766 | ||
767 | if (drive->wcache) { | |
768 | unsigned long long capacity; | |
769 | int barrier; | |
770 | /* | |
771 | * We must avoid issuing commands a drive does not | |
772 | * understand or we may crash it. We check flush cache | |
773 | * is supported. We also check we have the LBA48 flush | |
774 | * cache if the drive capacity is too large. By this | |
775 | * time we have trimmed the drive capacity if LBA48 is | |
776 | * not available so we don't need to recheck that. | |
777 | */ | |
778 | capacity = idedisk_capacity(drive); | |
36193484 | 779 | barrier = ide_id_has_flush_cache(id) && !drive->noflush && |
3e087b57 TH |
780 | (drive->addressing == 0 || capacity <= (1ULL << 28) || |
781 | ide_id_has_flush_cache_ext(id)); | |
782 | ||
783 | printk(KERN_INFO "%s: cache flushes %ssupported\n", | |
f7ad836c | 784 | drive->name, barrier ? "" : "not "); |
3e087b57 TH |
785 | |
786 | if (barrier) { | |
787 | ordered = QUEUE_ORDERED_DRAIN_FLUSH; | |
788 | prep_fn = idedisk_prepare_flush; | |
789 | issue_fn = idedisk_issue_flush; | |
790 | } | |
791 | } else | |
792 | ordered = QUEUE_ORDERED_DRAIN; | |
793 | ||
794 | blk_queue_ordered(drive->queue, ordered, prep_fn); | |
795 | blk_queue_issue_flush_fn(drive->queue, issue_fn); | |
796 | } | |
797 | ||
1da177e4 LT |
798 | static int write_cache(ide_drive_t *drive, int arg) |
799 | { | |
800 | ide_task_t args; | |
3e087b57 | 801 | int err = 1; |
1da177e4 | 802 | |
3e087b57 TH |
803 | if (ide_id_has_flush_cache(drive->id)) { |
804 | memset(&args, 0, sizeof(ide_task_t)); | |
805 | args.tfRegister[IDE_FEATURE_OFFSET] = (arg) ? | |
1da177e4 | 806 | SETFEATURES_EN_WCACHE : SETFEATURES_DIS_WCACHE; |
3e087b57 TH |
807 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SETFEATURES; |
808 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
809 | args.handler = &task_no_data_intr; | |
810 | err = ide_raw_taskfile(drive, &args, NULL); | |
811 | if (err == 0) | |
812 | drive->wcache = arg; | |
813 | } | |
1da177e4 | 814 | |
3e087b57 | 815 | update_ordered(drive); |
1da177e4 | 816 | |
3e087b57 | 817 | return err; |
1da177e4 LT |
818 | } |
819 | ||
820 | static int do_idedisk_flushcache (ide_drive_t *drive) | |
821 | { | |
822 | ide_task_t args; | |
823 | ||
824 | memset(&args, 0, sizeof(ide_task_t)); | |
825 | if (ide_id_has_flush_cache_ext(drive->id)) | |
826 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_FLUSH_CACHE_EXT; | |
827 | else | |
828 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_FLUSH_CACHE; | |
829 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
830 | args.handler = &task_no_data_intr; | |
831 | return ide_raw_taskfile(drive, &args, NULL); | |
832 | } | |
833 | ||
834 | static int set_acoustic (ide_drive_t *drive, int arg) | |
835 | { | |
836 | ide_task_t args; | |
837 | ||
838 | memset(&args, 0, sizeof(ide_task_t)); | |
839 | args.tfRegister[IDE_FEATURE_OFFSET] = (arg) ? SETFEATURES_EN_AAM : | |
840 | SETFEATURES_DIS_AAM; | |
841 | args.tfRegister[IDE_NSECTOR_OFFSET] = arg; | |
842 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SETFEATURES; | |
843 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
844 | args.handler = &task_no_data_intr; | |
845 | ide_raw_taskfile(drive, &args, NULL); | |
846 | drive->acoustic = arg; | |
847 | return 0; | |
848 | } | |
849 | ||
850 | /* | |
851 | * drive->addressing: | |
852 | * 0: 28-bit | |
853 | * 1: 48-bit | |
854 | * 2: 48-bit capable doing 28-bit | |
855 | */ | |
856 | static int set_lba_addressing(ide_drive_t *drive, int arg) | |
857 | { | |
858 | drive->addressing = 0; | |
859 | ||
860 | if (HWIF(drive)->no_lba48) | |
861 | return 0; | |
862 | ||
863 | if (!idedisk_supports_lba48(drive->id)) | |
864 | return -EIO; | |
865 | drive->addressing = arg; | |
866 | return 0; | |
867 | } | |
868 | ||
869 | static void idedisk_add_settings(ide_drive_t *drive) | |
870 | { | |
871 | struct hd_driveid *id = drive->id; | |
872 | ||
873 | ide_add_setting(drive, "bios_cyl", SETTING_RW, -1, -1, TYPE_INT, 0, 65535, 1, 1, &drive->bios_cyl, NULL); | |
874 | ide_add_setting(drive, "bios_head", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); | |
875 | ide_add_setting(drive, "bios_sect", SETTING_RW, -1, -1, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); | |
876 | ide_add_setting(drive, "address", SETTING_RW, HDIO_GET_ADDRESS, HDIO_SET_ADDRESS, TYPE_INTA, 0, 2, 1, 1, &drive->addressing, set_lba_addressing); | |
877 | ide_add_setting(drive, "bswap", SETTING_READ, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->bswap, NULL); | |
878 | 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); | |
879 | ide_add_setting(drive, "nowerr", SETTING_RW, HDIO_GET_NOWERR, HDIO_SET_NOWERR, TYPE_BYTE, 0, 1, 1, 1, &drive->nowerr, set_nowerr); | |
880 | ide_add_setting(drive, "lun", SETTING_RW, -1, -1, TYPE_INT, 0, 7, 1, 1, &drive->lun, NULL); | |
881 | ide_add_setting(drive, "wcache", SETTING_RW, HDIO_GET_WCACHE, HDIO_SET_WCACHE, TYPE_BYTE, 0, 1, 1, 1, &drive->wcache, write_cache); | |
882 | ide_add_setting(drive, "acoustic", SETTING_RW, HDIO_GET_ACOUSTIC, HDIO_SET_ACOUSTIC, TYPE_BYTE, 0, 254, 1, 1, &drive->acoustic, set_acoustic); | |
883 | ide_add_setting(drive, "failures", SETTING_RW, -1, -1, TYPE_INT, 0, 65535, 1, 1, &drive->failures, NULL); | |
884 | ide_add_setting(drive, "max_failures", SETTING_RW, -1, -1, TYPE_INT, 0, 65535, 1, 1, &drive->max_failures, NULL); | |
885 | } | |
886 | ||
887 | static void idedisk_setup (ide_drive_t *drive) | |
888 | { | |
889 | struct hd_driveid *id = drive->id; | |
890 | unsigned long long capacity; | |
1da177e4 LT |
891 | |
892 | idedisk_add_settings(drive); | |
893 | ||
894 | if (drive->id_read == 0) | |
895 | return; | |
896 | ||
98109337 | 897 | if (drive->removable) { |
1da177e4 LT |
898 | /* |
899 | * Removable disks (eg. SYQUEST); ignore 'WD' drives | |
900 | */ | |
901 | if (id->model[0] != 'W' || id->model[1] != 'D') { | |
902 | drive->doorlocking = 1; | |
903 | } | |
904 | } | |
905 | ||
906 | (void)set_lba_addressing(drive, 1); | |
907 | ||
908 | if (drive->addressing == 1) { | |
909 | ide_hwif_t *hwif = HWIF(drive); | |
910 | int max_s = 2048; | |
911 | ||
912 | if (max_s > hwif->rqsize) | |
913 | max_s = hwif->rqsize; | |
914 | ||
915 | blk_queue_max_sectors(drive->queue, max_s); | |
916 | } | |
917 | ||
918 | printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, drive->queue->max_sectors / 2); | |
919 | ||
920 | /* calculate drive capacity, and select LBA if possible */ | |
921 | init_idedisk_capacity (drive); | |
922 | ||
923 | /* limit drive capacity to 137GB if LBA48 cannot be used */ | |
924 | if (drive->addressing == 0 && drive->capacity64 > 1ULL << 28) { | |
925 | printk(KERN_WARNING "%s: cannot use LBA48 - full capacity " | |
926 | "%llu sectors (%llu MB)\n", | |
927 | drive->name, (unsigned long long)drive->capacity64, | |
928 | sectors_to_MB(drive->capacity64)); | |
929 | drive->capacity64 = 1ULL << 28; | |
930 | } | |
931 | ||
932 | if (drive->hwif->no_lba48_dma && drive->addressing) { | |
933 | if (drive->capacity64 > 1ULL << 28) { | |
934 | printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode will" | |
935 | " be used for accessing sectors > %u\n", | |
936 | drive->name, 1 << 28); | |
937 | } else | |
938 | drive->addressing = 0; | |
939 | } | |
940 | ||
941 | /* | |
942 | * if possible, give fdisk access to more of the drive, | |
943 | * by correcting bios_cyls: | |
944 | */ | |
945 | capacity = idedisk_capacity (drive); | |
946 | if (!drive->forced_geom) { | |
947 | ||
948 | if (idedisk_supports_lba48(drive->id)) { | |
949 | /* compatibility */ | |
950 | drive->bios_sect = 63; | |
951 | drive->bios_head = 255; | |
952 | } | |
953 | ||
954 | if (drive->bios_sect && drive->bios_head) { | |
955 | unsigned int cap0 = capacity; /* truncate to 32 bits */ | |
956 | unsigned int cylsz, cyl; | |
957 | ||
958 | if (cap0 != capacity) | |
959 | drive->bios_cyl = 65535; | |
960 | else { | |
961 | cylsz = drive->bios_sect * drive->bios_head; | |
962 | cyl = cap0 / cylsz; | |
963 | if (cyl > 65535) | |
964 | cyl = 65535; | |
965 | if (cyl > drive->bios_cyl) | |
966 | drive->bios_cyl = cyl; | |
967 | } | |
968 | } | |
969 | } | |
970 | printk(KERN_INFO "%s: %llu sectors (%llu MB)", | |
971 | drive->name, capacity, sectors_to_MB(capacity)); | |
972 | ||
973 | /* Only print cache size when it was specified */ | |
974 | if (id->buf_size) | |
975 | printk (" w/%dKiB Cache", id->buf_size/2); | |
976 | ||
977 | printk(", CHS=%d/%d/%d", | |
978 | drive->bios_cyl, drive->bios_head, drive->bios_sect); | |
979 | if (drive->using_dma) | |
980 | ide_dma_verbose(drive); | |
981 | printk("\n"); | |
982 | ||
1da177e4 LT |
983 | /* write cache enabled? */ |
984 | if ((id->csfo & 1) || (id->cfs_enable_1 & (1 << 5))) | |
985 | drive->wcache = 1; | |
986 | ||
987 | write_cache(drive, 1); | |
1da177e4 LT |
988 | } |
989 | ||
990 | static void ide_cacheflush_p(ide_drive_t *drive) | |
991 | { | |
992 | if (!drive->wcache || !ide_id_has_flush_cache(drive->id)) | |
993 | return; | |
994 | ||
995 | if (do_idedisk_flushcache(drive)) | |
996 | printk(KERN_INFO "%s: wcache flush failed!\n", drive->name); | |
997 | } | |
998 | ||
4031bbe4 | 999 | static void ide_disk_remove(ide_drive_t *drive) |
1da177e4 LT |
1000 | { |
1001 | struct ide_disk_obj *idkp = drive->driver_data; | |
1002 | struct gendisk *g = idkp->disk; | |
1003 | ||
8604affd BZ |
1004 | ide_unregister_subdriver(drive, idkp->driver); |
1005 | ||
1da177e4 LT |
1006 | del_gendisk(g); |
1007 | ||
d36fef6f BZ |
1008 | ide_cacheflush_p(drive); |
1009 | ||
1da177e4 | 1010 | ide_disk_put(idkp); |
1da177e4 LT |
1011 | } |
1012 | ||
1013 | static void ide_disk_release(struct kref *kref) | |
1014 | { | |
1015 | struct ide_disk_obj *idkp = to_ide_disk(kref); | |
1016 | ide_drive_t *drive = idkp->drive; | |
1017 | struct gendisk *g = idkp->disk; | |
1018 | ||
1019 | drive->driver_data = NULL; | |
1da177e4 LT |
1020 | g->private_data = NULL; |
1021 | put_disk(g); | |
1022 | kfree(idkp); | |
1023 | } | |
1024 | ||
4031bbe4 | 1025 | static int ide_disk_probe(ide_drive_t *drive); |
1da177e4 | 1026 | |
4031bbe4 | 1027 | static void ide_device_shutdown(ide_drive_t *drive) |
1da177e4 | 1028 | { |
1da177e4 LT |
1029 | #ifdef CONFIG_ALPHA |
1030 | /* On Alpha, halt(8) doesn't actually turn the machine off, | |
1031 | it puts you into the sort of firmware monitor. Typically, | |
1032 | it's used to boot another kernel image, so it's not much | |
1033 | different from reboot(8). Therefore, we don't need to | |
1034 | spin down the disk in this case, especially since Alpha | |
1035 | firmware doesn't handle disks in standby mode properly. | |
1036 | On the other hand, it's reasonably safe to turn the power | |
1037 | off when the shutdown process reaches the firmware prompt, | |
1038 | as the firmware initialization takes rather long time - | |
1039 | at least 10 seconds, which should be sufficient for | |
1040 | the disk to expire its write cache. */ | |
1041 | if (system_state != SYSTEM_POWER_OFF) { | |
1042 | #else | |
1043 | if (system_state == SYSTEM_RESTART) { | |
1044 | #endif | |
1045 | ide_cacheflush_p(drive); | |
1046 | return; | |
1047 | } | |
1048 | ||
1049 | printk("Shutdown: %s\n", drive->name); | |
4031bbe4 | 1050 | drive->gendev.bus->suspend(&drive->gendev, PMSG_SUSPEND); |
1da177e4 LT |
1051 | } |
1052 | ||
1da177e4 | 1053 | static ide_driver_t idedisk_driver = { |
1da177e4 | 1054 | .gen_driver = { |
4ef3b8f4 | 1055 | .owner = THIS_MODULE, |
8604affd BZ |
1056 | .name = "ide-disk", |
1057 | .bus = &ide_bus_type, | |
1da177e4 | 1058 | }, |
4031bbe4 RK |
1059 | .probe = ide_disk_probe, |
1060 | .remove = ide_disk_remove, | |
1061 | .shutdown = ide_device_shutdown, | |
1da177e4 LT |
1062 | .version = IDEDISK_VERSION, |
1063 | .media = ide_disk, | |
1da177e4 | 1064 | .supports_dsc_overlap = 0, |
1da177e4 LT |
1065 | .do_request = ide_do_rw_disk, |
1066 | .end_request = ide_end_request, | |
1067 | .error = __ide_error, | |
1068 | .abort = __ide_abort, | |
1069 | .proc = idedisk_proc, | |
1da177e4 LT |
1070 | }; |
1071 | ||
1072 | static int idedisk_open(struct inode *inode, struct file *filp) | |
1073 | { | |
1074 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
1075 | struct ide_disk_obj *idkp; | |
1076 | ide_drive_t *drive; | |
1077 | ||
1078 | if (!(idkp = ide_disk_get(disk))) | |
1079 | return -ENXIO; | |
1080 | ||
1081 | drive = idkp->drive; | |
1082 | ||
1083 | drive->usage++; | |
1084 | if (drive->removable && drive->usage == 1) { | |
1085 | ide_task_t args; | |
1086 | memset(&args, 0, sizeof(ide_task_t)); | |
1087 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_DOORLOCK; | |
1088 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
1089 | args.handler = &task_no_data_intr; | |
1090 | check_disk_change(inode->i_bdev); | |
1091 | /* | |
1092 | * Ignore the return code from door_lock, | |
1093 | * since the open() has already succeeded, | |
1094 | * and the door_lock is irrelevant at this point. | |
1095 | */ | |
1096 | if (drive->doorlocking && ide_raw_taskfile(drive, &args, NULL)) | |
1097 | drive->doorlocking = 0; | |
1098 | } | |
1099 | return 0; | |
1100 | } | |
1101 | ||
1102 | static int idedisk_release(struct inode *inode, struct file *filp) | |
1103 | { | |
1104 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
1105 | struct ide_disk_obj *idkp = ide_disk_g(disk); | |
1106 | ide_drive_t *drive = idkp->drive; | |
1107 | ||
1108 | if (drive->usage == 1) | |
1109 | ide_cacheflush_p(drive); | |
1110 | if (drive->removable && drive->usage == 1) { | |
1111 | ide_task_t args; | |
1112 | memset(&args, 0, sizeof(ide_task_t)); | |
1113 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_DOORUNLOCK; | |
1114 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
1115 | args.handler = &task_no_data_intr; | |
1116 | if (drive->doorlocking && ide_raw_taskfile(drive, &args, NULL)) | |
1117 | drive->doorlocking = 0; | |
1118 | } | |
1119 | drive->usage--; | |
1120 | ||
1121 | ide_disk_put(idkp); | |
1122 | ||
1123 | return 0; | |
1124 | } | |
1125 | ||
a885c8c4 CH |
1126 | static int idedisk_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1127 | { | |
1128 | struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk); | |
1129 | ide_drive_t *drive = idkp->drive; | |
1130 | ||
1131 | geo->heads = drive->bios_head; | |
1132 | geo->sectors = drive->bios_sect; | |
1133 | geo->cylinders = (u16)drive->bios_cyl; /* truncate */ | |
1134 | return 0; | |
1135 | } | |
1136 | ||
1da177e4 LT |
1137 | static int idedisk_ioctl(struct inode *inode, struct file *file, |
1138 | unsigned int cmd, unsigned long arg) | |
1139 | { | |
1140 | struct block_device *bdev = inode->i_bdev; | |
1141 | struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk); | |
1142 | return generic_ide_ioctl(idkp->drive, file, bdev, cmd, arg); | |
1143 | } | |
1144 | ||
1145 | static int idedisk_media_changed(struct gendisk *disk) | |
1146 | { | |
1147 | struct ide_disk_obj *idkp = ide_disk_g(disk); | |
1148 | ide_drive_t *drive = idkp->drive; | |
1149 | ||
1150 | /* do not scan partitions twice if this is a removable device */ | |
1151 | if (drive->attach) { | |
1152 | drive->attach = 0; | |
1153 | return 0; | |
1154 | } | |
1155 | /* if removable, always assume it was changed */ | |
1156 | return drive->removable; | |
1157 | } | |
1158 | ||
1159 | static int idedisk_revalidate_disk(struct gendisk *disk) | |
1160 | { | |
1161 | struct ide_disk_obj *idkp = ide_disk_g(disk); | |
1162 | set_capacity(disk, idedisk_capacity(idkp->drive)); | |
1163 | return 0; | |
1164 | } | |
1165 | ||
1166 | static struct block_device_operations idedisk_ops = { | |
1167 | .owner = THIS_MODULE, | |
1168 | .open = idedisk_open, | |
1169 | .release = idedisk_release, | |
1170 | .ioctl = idedisk_ioctl, | |
a885c8c4 | 1171 | .getgeo = idedisk_getgeo, |
1da177e4 LT |
1172 | .media_changed = idedisk_media_changed, |
1173 | .revalidate_disk= idedisk_revalidate_disk | |
1174 | }; | |
1175 | ||
1176 | MODULE_DESCRIPTION("ATA DISK Driver"); | |
1177 | ||
4031bbe4 | 1178 | static int ide_disk_probe(ide_drive_t *drive) |
1da177e4 LT |
1179 | { |
1180 | struct ide_disk_obj *idkp; | |
1181 | struct gendisk *g; | |
1182 | ||
1183 | /* strstr("foo", "") is non-NULL */ | |
1184 | if (!strstr("ide-disk", drive->driver_req)) | |
1185 | goto failed; | |
1186 | if (!drive->present) | |
1187 | goto failed; | |
1188 | if (drive->media != ide_disk) | |
1189 | goto failed; | |
1190 | ||
f5e3c2fa | 1191 | idkp = kzalloc(sizeof(*idkp), GFP_KERNEL); |
1da177e4 LT |
1192 | if (!idkp) |
1193 | goto failed; | |
1194 | ||
1946089a | 1195 | g = alloc_disk_node(1 << PARTN_BITS, |
86b37860 | 1196 | hwif_to_node(drive->hwif)); |
1da177e4 LT |
1197 | if (!g) |
1198 | goto out_free_idkp; | |
1199 | ||
1200 | ide_init_disk(g, drive); | |
1201 | ||
8604affd | 1202 | ide_register_subdriver(drive, &idedisk_driver); |
1da177e4 | 1203 | |
1da177e4 LT |
1204 | kref_init(&idkp->kref); |
1205 | ||
1206 | idkp->drive = drive; | |
1207 | idkp->driver = &idedisk_driver; | |
1208 | idkp->disk = g; | |
1209 | ||
1210 | g->private_data = &idkp->driver; | |
1211 | ||
1212 | drive->driver_data = idkp; | |
1213 | ||
1da177e4 LT |
1214 | idedisk_setup(drive); |
1215 | if ((!drive->head || drive->head > 16) && !drive->select.b.lba) { | |
1216 | printk(KERN_ERR "%s: INVALID GEOMETRY: %d PHYSICAL HEADS?\n", | |
1217 | drive->name, drive->head); | |
1218 | drive->attach = 0; | |
1219 | } else | |
1220 | drive->attach = 1; | |
8604affd | 1221 | |
1da177e4 | 1222 | g->minors = 1 << PARTN_BITS; |
1da177e4 LT |
1223 | g->driverfs_dev = &drive->gendev; |
1224 | g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; | |
1225 | set_capacity(g, idedisk_capacity(drive)); | |
1226 | g->fops = &idedisk_ops; | |
1227 | add_disk(g); | |
1228 | return 0; | |
1229 | ||
1da177e4 LT |
1230 | out_free_idkp: |
1231 | kfree(idkp); | |
1232 | failed: | |
8604affd | 1233 | return -ENODEV; |
1da177e4 LT |
1234 | } |
1235 | ||
1236 | static void __exit idedisk_exit (void) | |
1237 | { | |
8604affd | 1238 | driver_unregister(&idedisk_driver.gen_driver); |
1da177e4 LT |
1239 | } |
1240 | ||
17514e8a | 1241 | static int __init idedisk_init(void) |
1da177e4 | 1242 | { |
8604affd | 1243 | return driver_register(&idedisk_driver.gen_driver); |
1da177e4 LT |
1244 | } |
1245 | ||
263756ec | 1246 | MODULE_ALIAS("ide:*m-disk*"); |
1da177e4 LT |
1247 | module_init(idedisk_init); |
1248 | module_exit(idedisk_exit); | |
1249 | MODULE_LICENSE("GPL"); |