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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 | |
40 | * Version 1.17 do flush on standy, do flush on ATA < ATA6 | |
41 | * fix wcache setup. | |
42 | */ | |
43 | ||
44 | #define IDEDISK_VERSION "1.18" | |
45 | ||
46 | #undef REALLY_SLOW_IO /* most systems can safely undef this */ | |
47 | ||
48 | //#define DEBUG | |
49 | ||
50 | #include <linux/config.h> | |
51 | #include <linux/module.h> | |
52 | #include <linux/types.h> | |
53 | #include <linux/string.h> | |
54 | #include <linux/kernel.h> | |
55 | #include <linux/timer.h> | |
56 | #include <linux/mm.h> | |
57 | #include <linux/interrupt.h> | |
58 | #include <linux/major.h> | |
59 | #include <linux/errno.h> | |
60 | #include <linux/genhd.h> | |
61 | #include <linux/slab.h> | |
62 | #include <linux/delay.h> | |
63 | ||
64 | #define _IDE_DISK | |
65 | ||
66 | #include <linux/ide.h> | |
67 | ||
68 | #include <asm/byteorder.h> | |
69 | #include <asm/irq.h> | |
70 | #include <asm/uaccess.h> | |
71 | #include <asm/io.h> | |
72 | #include <asm/div64.h> | |
73 | ||
74 | struct ide_disk_obj { | |
75 | ide_drive_t *drive; | |
76 | ide_driver_t *driver; | |
77 | struct gendisk *disk; | |
78 | struct kref kref; | |
79 | }; | |
80 | ||
81 | static DECLARE_MUTEX(idedisk_ref_sem); | |
82 | ||
83 | #define to_ide_disk(obj) container_of(obj, struct ide_disk_obj, kref) | |
84 | ||
85 | #define ide_disk_g(disk) \ | |
86 | container_of((disk)->private_data, struct ide_disk_obj, driver) | |
87 | ||
88 | static struct ide_disk_obj *ide_disk_get(struct gendisk *disk) | |
89 | { | |
90 | struct ide_disk_obj *idkp = NULL; | |
91 | ||
92 | down(&idedisk_ref_sem); | |
93 | idkp = ide_disk_g(disk); | |
94 | if (idkp) | |
95 | kref_get(&idkp->kref); | |
96 | up(&idedisk_ref_sem); | |
97 | return idkp; | |
98 | } | |
99 | ||
100 | static void ide_disk_release(struct kref *); | |
101 | ||
102 | static void ide_disk_put(struct ide_disk_obj *idkp) | |
103 | { | |
104 | down(&idedisk_ref_sem); | |
105 | kref_put(&idkp->kref, ide_disk_release); | |
106 | up(&idedisk_ref_sem); | |
107 | } | |
108 | ||
109 | /* | |
110 | * lba_capacity_is_ok() performs a sanity check on the claimed "lba_capacity" | |
111 | * value for this drive (from its reported identification information). | |
112 | * | |
113 | * Returns: 1 if lba_capacity looks sensible | |
114 | * 0 otherwise | |
115 | * | |
116 | * It is called only once for each drive. | |
117 | */ | |
118 | static int lba_capacity_is_ok (struct hd_driveid *id) | |
119 | { | |
120 | unsigned long lba_sects, chs_sects, head, tail; | |
121 | ||
122 | /* | |
123 | * The ATA spec tells large drives to return | |
124 | * C/H/S = 16383/16/63 independent of their size. | |
125 | * Some drives can be jumpered to use 15 heads instead of 16. | |
126 | * Some drives can be jumpered to use 4092 cyls instead of 16383. | |
127 | */ | |
128 | if ((id->cyls == 16383 | |
129 | || (id->cyls == 4092 && id->cur_cyls == 16383)) && | |
130 | id->sectors == 63 && | |
131 | (id->heads == 15 || id->heads == 16) && | |
132 | (id->lba_capacity >= 16383*63*id->heads)) | |
133 | return 1; | |
134 | ||
135 | lba_sects = id->lba_capacity; | |
136 | chs_sects = id->cyls * id->heads * id->sectors; | |
137 | ||
138 | /* perform a rough sanity check on lba_sects: within 10% is OK */ | |
139 | if ((lba_sects - chs_sects) < chs_sects/10) | |
140 | return 1; | |
141 | ||
142 | /* some drives have the word order reversed */ | |
143 | head = ((lba_sects >> 16) & 0xffff); | |
144 | tail = (lba_sects & 0xffff); | |
145 | lba_sects = (head | (tail << 16)); | |
146 | if ((lba_sects - chs_sects) < chs_sects/10) { | |
147 | id->lba_capacity = lba_sects; | |
148 | return 1; /* lba_capacity is (now) good */ | |
149 | } | |
150 | ||
151 | return 0; /* lba_capacity value may be bad */ | |
152 | } | |
153 | ||
154 | /* | |
155 | * __ide_do_rw_disk() issues READ and WRITE commands to a disk, | |
156 | * using LBA if supported, or CHS otherwise, to address sectors. | |
157 | */ | |
158 | static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq, sector_t block) | |
159 | { | |
160 | ide_hwif_t *hwif = HWIF(drive); | |
161 | unsigned int dma = drive->using_dma; | |
162 | u8 lba48 = (drive->addressing == 1) ? 1 : 0; | |
163 | task_ioreg_t command = WIN_NOP; | |
164 | ata_nsector_t nsectors; | |
165 | ||
166 | nsectors.all = (u16) rq->nr_sectors; | |
167 | ||
168 | if (hwif->no_lba48_dma && lba48 && dma) { | |
169 | if (block + rq->nr_sectors > 1ULL << 28) | |
170 | dma = 0; | |
171 | else | |
172 | lba48 = 0; | |
173 | } | |
174 | ||
175 | if (!dma) { | |
176 | ide_init_sg_cmd(drive, rq); | |
177 | ide_map_sg(drive, rq); | |
178 | } | |
179 | ||
180 | if (IDE_CONTROL_REG) | |
181 | hwif->OUTB(drive->ctl, IDE_CONTROL_REG); | |
182 | ||
183 | /* FIXME: SELECT_MASK(drive, 0) ? */ | |
184 | ||
185 | if (drive->select.b.lba) { | |
186 | if (lba48) { | |
187 | task_ioreg_t tasklets[10]; | |
188 | ||
189 | pr_debug("%s: LBA=0x%012llx\n", drive->name, block); | |
190 | ||
191 | tasklets[0] = 0; | |
192 | tasklets[1] = 0; | |
193 | tasklets[2] = nsectors.b.low; | |
194 | tasklets[3] = nsectors.b.high; | |
195 | tasklets[4] = (task_ioreg_t) block; | |
196 | tasklets[5] = (task_ioreg_t) (block>>8); | |
197 | tasklets[6] = (task_ioreg_t) (block>>16); | |
198 | tasklets[7] = (task_ioreg_t) (block>>24); | |
199 | if (sizeof(block) == 4) { | |
200 | tasklets[8] = (task_ioreg_t) 0; | |
201 | tasklets[9] = (task_ioreg_t) 0; | |
202 | } else { | |
203 | tasklets[8] = (task_ioreg_t)((u64)block >> 32); | |
204 | tasklets[9] = (task_ioreg_t)((u64)block >> 40); | |
205 | } | |
206 | #ifdef DEBUG | |
207 | printk("%s: 0x%02x%02x 0x%02x%02x%02x%02x%02x%02x\n", | |
208 | drive->name, tasklets[3], tasklets[2], | |
209 | tasklets[9], tasklets[8], tasklets[7], | |
210 | tasklets[6], tasklets[5], tasklets[4]); | |
211 | #endif | |
212 | hwif->OUTB(tasklets[1], IDE_FEATURE_REG); | |
213 | hwif->OUTB(tasklets[3], IDE_NSECTOR_REG); | |
214 | hwif->OUTB(tasklets[7], IDE_SECTOR_REG); | |
215 | hwif->OUTB(tasklets[8], IDE_LCYL_REG); | |
216 | hwif->OUTB(tasklets[9], IDE_HCYL_REG); | |
217 | ||
218 | hwif->OUTB(tasklets[0], IDE_FEATURE_REG); | |
219 | hwif->OUTB(tasklets[2], IDE_NSECTOR_REG); | |
220 | hwif->OUTB(tasklets[4], IDE_SECTOR_REG); | |
221 | hwif->OUTB(tasklets[5], IDE_LCYL_REG); | |
222 | hwif->OUTB(tasklets[6], IDE_HCYL_REG); | |
223 | hwif->OUTB(0x00|drive->select.all,IDE_SELECT_REG); | |
224 | } else { | |
225 | hwif->OUTB(0x00, IDE_FEATURE_REG); | |
226 | hwif->OUTB(nsectors.b.low, IDE_NSECTOR_REG); | |
227 | hwif->OUTB(block, IDE_SECTOR_REG); | |
228 | hwif->OUTB(block>>=8, IDE_LCYL_REG); | |
229 | hwif->OUTB(block>>=8, IDE_HCYL_REG); | |
230 | hwif->OUTB(((block>>8)&0x0f)|drive->select.all,IDE_SELECT_REG); | |
231 | } | |
232 | } else { | |
233 | unsigned int sect,head,cyl,track; | |
234 | track = (int)block / drive->sect; | |
235 | sect = (int)block % drive->sect + 1; | |
236 | hwif->OUTB(sect, IDE_SECTOR_REG); | |
237 | head = track % drive->head; | |
238 | cyl = track / drive->head; | |
239 | ||
240 | pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect); | |
241 | ||
242 | hwif->OUTB(0x00, IDE_FEATURE_REG); | |
243 | hwif->OUTB(nsectors.b.low, IDE_NSECTOR_REG); | |
244 | hwif->OUTB(cyl, IDE_LCYL_REG); | |
245 | hwif->OUTB(cyl>>8, IDE_HCYL_REG); | |
246 | hwif->OUTB(head|drive->select.all,IDE_SELECT_REG); | |
247 | } | |
248 | ||
249 | if (dma) { | |
250 | if (!hwif->dma_setup(drive)) { | |
251 | if (rq_data_dir(rq)) { | |
252 | command = lba48 ? WIN_WRITEDMA_EXT : WIN_WRITEDMA; | |
253 | if (drive->vdma) | |
254 | command = lba48 ? WIN_WRITE_EXT: WIN_WRITE; | |
255 | } else { | |
256 | command = lba48 ? WIN_READDMA_EXT : WIN_READDMA; | |
257 | if (drive->vdma) | |
258 | command = lba48 ? WIN_READ_EXT: WIN_READ; | |
259 | } | |
260 | hwif->dma_exec_cmd(drive, command); | |
261 | hwif->dma_start(drive); | |
262 | return ide_started; | |
263 | } | |
264 | /* fallback to PIO */ | |
265 | ide_init_sg_cmd(drive, rq); | |
266 | } | |
267 | ||
268 | if (rq_data_dir(rq) == READ) { | |
269 | ||
270 | if (drive->mult_count) { | |
271 | hwif->data_phase = TASKFILE_MULTI_IN; | |
272 | command = lba48 ? WIN_MULTREAD_EXT : WIN_MULTREAD; | |
273 | } else { | |
274 | hwif->data_phase = TASKFILE_IN; | |
275 | command = lba48 ? WIN_READ_EXT : WIN_READ; | |
276 | } | |
277 | ||
278 | ide_execute_command(drive, command, &task_in_intr, WAIT_CMD, NULL); | |
279 | return ide_started; | |
280 | } else { | |
281 | if (drive->mult_count) { | |
282 | hwif->data_phase = TASKFILE_MULTI_OUT; | |
283 | command = lba48 ? WIN_MULTWRITE_EXT : WIN_MULTWRITE; | |
284 | } else { | |
285 | hwif->data_phase = TASKFILE_OUT; | |
286 | command = lba48 ? WIN_WRITE_EXT : WIN_WRITE; | |
287 | } | |
288 | ||
289 | /* FIXME: ->OUTBSYNC ? */ | |
290 | hwif->OUTB(command, IDE_COMMAND_REG); | |
291 | ||
292 | return pre_task_out_intr(drive, rq); | |
293 | } | |
294 | } | |
295 | ||
296 | /* | |
297 | * 268435455 == 137439 MB or 28bit limit | |
298 | * 320173056 == 163929 MB or 48bit addressing | |
299 | * 1073741822 == 549756 MB or 48bit addressing fake drive | |
300 | */ | |
301 | ||
302 | static ide_startstop_t ide_do_rw_disk (ide_drive_t *drive, struct request *rq, sector_t block) | |
303 | { | |
304 | ide_hwif_t *hwif = HWIF(drive); | |
305 | ||
306 | BUG_ON(drive->blocked); | |
307 | ||
308 | if (!blk_fs_request(rq)) { | |
309 | blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command"); | |
310 | ide_end_request(drive, 0, 0); | |
311 | return ide_stopped; | |
312 | } | |
313 | ||
314 | pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n", | |
315 | drive->name, rq_data_dir(rq) == READ ? "read" : "writ", | |
316 | block, rq->nr_sectors, (unsigned long)rq->buffer); | |
317 | ||
318 | if (hwif->rw_disk) | |
319 | hwif->rw_disk(drive, rq); | |
320 | ||
321 | return __ide_do_rw_disk(drive, rq, block); | |
322 | } | |
323 | ||
324 | /* | |
325 | * Queries for true maximum capacity of the drive. | |
326 | * Returns maximum LBA address (> 0) of the drive, 0 if failed. | |
327 | */ | |
328 | static unsigned long idedisk_read_native_max_address(ide_drive_t *drive) | |
329 | { | |
330 | ide_task_t args; | |
331 | unsigned long addr = 0; | |
332 | ||
333 | /* Create IDE/ATA command request structure */ | |
334 | memset(&args, 0, sizeof(ide_task_t)); | |
335 | args.tfRegister[IDE_SELECT_OFFSET] = 0x40; | |
336 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_READ_NATIVE_MAX; | |
337 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
338 | args.handler = &task_no_data_intr; | |
339 | /* submit command request */ | |
340 | ide_raw_taskfile(drive, &args, NULL); | |
341 | ||
342 | /* if OK, compute maximum address value */ | |
343 | if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) { | |
344 | addr = ((args.tfRegister[IDE_SELECT_OFFSET] & 0x0f) << 24) | |
345 | | ((args.tfRegister[ IDE_HCYL_OFFSET] ) << 16) | |
346 | | ((args.tfRegister[ IDE_LCYL_OFFSET] ) << 8) | |
347 | | ((args.tfRegister[IDE_SECTOR_OFFSET] )); | |
348 | addr++; /* since the return value is (maxlba - 1), we add 1 */ | |
349 | } | |
350 | return addr; | |
351 | } | |
352 | ||
353 | static unsigned long long idedisk_read_native_max_address_ext(ide_drive_t *drive) | |
354 | { | |
355 | ide_task_t args; | |
356 | unsigned long long addr = 0; | |
357 | ||
358 | /* Create IDE/ATA command request structure */ | |
359 | memset(&args, 0, sizeof(ide_task_t)); | |
360 | ||
361 | args.tfRegister[IDE_SELECT_OFFSET] = 0x40; | |
362 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_READ_NATIVE_MAX_EXT; | |
363 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
364 | args.handler = &task_no_data_intr; | |
365 | /* submit command request */ | |
366 | ide_raw_taskfile(drive, &args, NULL); | |
367 | ||
368 | /* if OK, compute maximum address value */ | |
369 | if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) { | |
370 | u32 high = (args.hobRegister[IDE_HCYL_OFFSET] << 16) | | |
371 | (args.hobRegister[IDE_LCYL_OFFSET] << 8) | | |
372 | args.hobRegister[IDE_SECTOR_OFFSET]; | |
373 | u32 low = ((args.tfRegister[IDE_HCYL_OFFSET])<<16) | | |
374 | ((args.tfRegister[IDE_LCYL_OFFSET])<<8) | | |
375 | (args.tfRegister[IDE_SECTOR_OFFSET]); | |
376 | addr = ((__u64)high << 24) | low; | |
377 | addr++; /* since the return value is (maxlba - 1), we add 1 */ | |
378 | } | |
379 | return addr; | |
380 | } | |
381 | ||
382 | /* | |
383 | * Sets maximum virtual LBA address of the drive. | |
384 | * Returns new maximum virtual LBA address (> 0) or 0 on failure. | |
385 | */ | |
386 | static unsigned long idedisk_set_max_address(ide_drive_t *drive, unsigned long addr_req) | |
387 | { | |
388 | ide_task_t args; | |
389 | unsigned long addr_set = 0; | |
390 | ||
391 | addr_req--; | |
392 | /* Create IDE/ATA command request structure */ | |
393 | memset(&args, 0, sizeof(ide_task_t)); | |
394 | args.tfRegister[IDE_SECTOR_OFFSET] = ((addr_req >> 0) & 0xff); | |
395 | args.tfRegister[IDE_LCYL_OFFSET] = ((addr_req >> 8) & 0xff); | |
396 | args.tfRegister[IDE_HCYL_OFFSET] = ((addr_req >> 16) & 0xff); | |
397 | args.tfRegister[IDE_SELECT_OFFSET] = ((addr_req >> 24) & 0x0f) | 0x40; | |
398 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SET_MAX; | |
399 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
400 | args.handler = &task_no_data_intr; | |
401 | /* submit command request */ | |
402 | ide_raw_taskfile(drive, &args, NULL); | |
403 | /* if OK, read new maximum address value */ | |
404 | if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) { | |
405 | addr_set = ((args.tfRegister[IDE_SELECT_OFFSET] & 0x0f) << 24) | |
406 | | ((args.tfRegister[ IDE_HCYL_OFFSET] ) << 16) | |
407 | | ((args.tfRegister[ IDE_LCYL_OFFSET] ) << 8) | |
408 | | ((args.tfRegister[IDE_SECTOR_OFFSET] )); | |
409 | addr_set++; | |
410 | } | |
411 | return addr_set; | |
412 | } | |
413 | ||
414 | static unsigned long long idedisk_set_max_address_ext(ide_drive_t *drive, unsigned long long addr_req) | |
415 | { | |
416 | ide_task_t args; | |
417 | unsigned long long addr_set = 0; | |
418 | ||
419 | addr_req--; | |
420 | /* Create IDE/ATA command request structure */ | |
421 | memset(&args, 0, sizeof(ide_task_t)); | |
422 | args.tfRegister[IDE_SECTOR_OFFSET] = ((addr_req >> 0) & 0xff); | |
423 | args.tfRegister[IDE_LCYL_OFFSET] = ((addr_req >>= 8) & 0xff); | |
424 | args.tfRegister[IDE_HCYL_OFFSET] = ((addr_req >>= 8) & 0xff); | |
425 | args.tfRegister[IDE_SELECT_OFFSET] = 0x40; | |
426 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SET_MAX_EXT; | |
427 | args.hobRegister[IDE_SECTOR_OFFSET] = (addr_req >>= 8) & 0xff; | |
428 | args.hobRegister[IDE_LCYL_OFFSET] = (addr_req >>= 8) & 0xff; | |
429 | args.hobRegister[IDE_HCYL_OFFSET] = (addr_req >>= 8) & 0xff; | |
430 | args.hobRegister[IDE_SELECT_OFFSET] = 0x40; | |
431 | args.hobRegister[IDE_CONTROL_OFFSET_HOB]= (drive->ctl|0x80); | |
432 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
433 | args.handler = &task_no_data_intr; | |
434 | /* submit command request */ | |
435 | ide_raw_taskfile(drive, &args, NULL); | |
436 | /* if OK, compute maximum address value */ | |
437 | if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) { | |
438 | u32 high = (args.hobRegister[IDE_HCYL_OFFSET] << 16) | | |
439 | (args.hobRegister[IDE_LCYL_OFFSET] << 8) | | |
440 | args.hobRegister[IDE_SECTOR_OFFSET]; | |
441 | u32 low = ((args.tfRegister[IDE_HCYL_OFFSET])<<16) | | |
442 | ((args.tfRegister[IDE_LCYL_OFFSET])<<8) | | |
443 | (args.tfRegister[IDE_SECTOR_OFFSET]); | |
444 | addr_set = ((__u64)high << 24) | low; | |
445 | addr_set++; | |
446 | } | |
447 | return addr_set; | |
448 | } | |
449 | ||
450 | static unsigned long long sectors_to_MB(unsigned long long n) | |
451 | { | |
452 | n <<= 9; /* make it bytes */ | |
453 | do_div(n, 1000000); /* make it MB */ | |
454 | return n; | |
455 | } | |
456 | ||
457 | /* | |
458 | * Bits 10 of command_set_1 and cfs_enable_1 must be equal, | |
459 | * so on non-buggy drives we need test only one. | |
460 | * However, we should also check whether these fields are valid. | |
461 | */ | |
462 | static inline int idedisk_supports_hpa(const struct hd_driveid *id) | |
463 | { | |
464 | return (id->command_set_1 & 0x0400) && (id->cfs_enable_1 & 0x0400); | |
465 | } | |
466 | ||
467 | /* | |
468 | * The same here. | |
469 | */ | |
470 | static inline int idedisk_supports_lba48(const struct hd_driveid *id) | |
471 | { | |
472 | return (id->command_set_2 & 0x0400) && (id->cfs_enable_2 & 0x0400) | |
473 | && id->lba_capacity_2; | |
474 | } | |
475 | ||
476 | static inline void idedisk_check_hpa(ide_drive_t *drive) | |
477 | { | |
478 | unsigned long long capacity, set_max; | |
479 | int lba48 = idedisk_supports_lba48(drive->id); | |
480 | ||
481 | capacity = drive->capacity64; | |
482 | if (lba48) | |
483 | set_max = idedisk_read_native_max_address_ext(drive); | |
484 | else | |
485 | set_max = idedisk_read_native_max_address(drive); | |
486 | ||
487 | if (set_max <= capacity) | |
488 | return; | |
489 | ||
490 | printk(KERN_INFO "%s: Host Protected Area detected.\n" | |
491 | "\tcurrent capacity is %llu sectors (%llu MB)\n" | |
492 | "\tnative capacity is %llu sectors (%llu MB)\n", | |
493 | drive->name, | |
494 | capacity, sectors_to_MB(capacity), | |
495 | set_max, sectors_to_MB(set_max)); | |
496 | ||
497 | if (lba48) | |
498 | set_max = idedisk_set_max_address_ext(drive, set_max); | |
499 | else | |
500 | set_max = idedisk_set_max_address(drive, set_max); | |
501 | if (set_max) { | |
502 | drive->capacity64 = set_max; | |
503 | printk(KERN_INFO "%s: Host Protected Area disabled.\n", | |
504 | drive->name); | |
505 | } | |
506 | } | |
507 | ||
508 | /* | |
509 | * Compute drive->capacity, the full capacity of the drive | |
510 | * Called with drive->id != NULL. | |
511 | * | |
512 | * To compute capacity, this uses either of | |
513 | * | |
514 | * 1. CHS value set by user (whatever user sets will be trusted) | |
515 | * 2. LBA value from target drive (require new ATA feature) | |
516 | * 3. LBA value from system BIOS (new one is OK, old one may break) | |
517 | * 4. CHS value from system BIOS (traditional style) | |
518 | * | |
519 | * in above order (i.e., if value of higher priority is available, | |
520 | * reset will be ignored). | |
521 | */ | |
522 | static void init_idedisk_capacity (ide_drive_t *drive) | |
523 | { | |
524 | struct hd_driveid *id = drive->id; | |
525 | /* | |
526 | * If this drive supports the Host Protected Area feature set, | |
527 | * then we may need to change our opinion about the drive's capacity. | |
528 | */ | |
529 | int hpa = idedisk_supports_hpa(id); | |
530 | ||
531 | if (idedisk_supports_lba48(id)) { | |
532 | /* drive speaks 48-bit LBA */ | |
533 | drive->select.b.lba = 1; | |
534 | drive->capacity64 = id->lba_capacity_2; | |
535 | if (hpa) | |
536 | idedisk_check_hpa(drive); | |
537 | } else if ((id->capability & 2) && lba_capacity_is_ok(id)) { | |
538 | /* drive speaks 28-bit LBA */ | |
539 | drive->select.b.lba = 1; | |
540 | drive->capacity64 = id->lba_capacity; | |
541 | if (hpa) | |
542 | idedisk_check_hpa(drive); | |
543 | } else { | |
544 | /* drive speaks boring old 28-bit CHS */ | |
545 | drive->capacity64 = drive->cyl * drive->head * drive->sect; | |
546 | } | |
547 | } | |
548 | ||
549 | static sector_t idedisk_capacity (ide_drive_t *drive) | |
550 | { | |
551 | return drive->capacity64 - drive->sect0; | |
552 | } | |
553 | ||
554 | #ifdef CONFIG_PROC_FS | |
555 | ||
556 | static int smart_enable(ide_drive_t *drive) | |
557 | { | |
558 | ide_task_t args; | |
559 | ||
560 | memset(&args, 0, sizeof(ide_task_t)); | |
561 | args.tfRegister[IDE_FEATURE_OFFSET] = SMART_ENABLE; | |
562 | args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS; | |
563 | args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS; | |
564 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART; | |
565 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
566 | args.handler = &task_no_data_intr; | |
567 | return ide_raw_taskfile(drive, &args, NULL); | |
568 | } | |
569 | ||
570 | static int get_smart_values(ide_drive_t *drive, u8 *buf) | |
571 | { | |
572 | ide_task_t args; | |
573 | ||
574 | memset(&args, 0, sizeof(ide_task_t)); | |
575 | args.tfRegister[IDE_FEATURE_OFFSET] = SMART_READ_VALUES; | |
576 | args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01; | |
577 | args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS; | |
578 | args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS; | |
579 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART; | |
580 | args.command_type = IDE_DRIVE_TASK_IN; | |
581 | args.data_phase = TASKFILE_IN; | |
582 | args.handler = &task_in_intr; | |
583 | (void) smart_enable(drive); | |
584 | return ide_raw_taskfile(drive, &args, buf); | |
585 | } | |
586 | ||
587 | static int get_smart_thresholds(ide_drive_t *drive, u8 *buf) | |
588 | { | |
589 | ide_task_t args; | |
590 | memset(&args, 0, sizeof(ide_task_t)); | |
591 | args.tfRegister[IDE_FEATURE_OFFSET] = SMART_READ_THRESHOLDS; | |
592 | args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01; | |
593 | args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS; | |
594 | args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS; | |
595 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART; | |
596 | args.command_type = IDE_DRIVE_TASK_IN; | |
597 | args.data_phase = TASKFILE_IN; | |
598 | args.handler = &task_in_intr; | |
599 | (void) smart_enable(drive); | |
600 | return ide_raw_taskfile(drive, &args, buf); | |
601 | } | |
602 | ||
603 | static int proc_idedisk_read_cache | |
604 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
605 | { | |
606 | ide_drive_t *drive = (ide_drive_t *) data; | |
607 | char *out = page; | |
608 | int len; | |
609 | ||
610 | if (drive->id_read) | |
611 | len = sprintf(out,"%i\n", drive->id->buf_size / 2); | |
612 | else | |
613 | len = sprintf(out,"(none)\n"); | |
614 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
615 | } | |
616 | ||
617 | static int proc_idedisk_read_capacity | |
618 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
619 | { | |
620 | ide_drive_t*drive = (ide_drive_t *)data; | |
621 | int len; | |
622 | ||
623 | len = sprintf(page,"%llu\n", (long long)idedisk_capacity(drive)); | |
624 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
625 | } | |
626 | ||
627 | static int proc_idedisk_read_smart_thresholds | |
628 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
629 | { | |
630 | ide_drive_t *drive = (ide_drive_t *)data; | |
631 | int len = 0, i = 0; | |
632 | ||
633 | if (!get_smart_thresholds(drive, page)) { | |
634 | unsigned short *val = (unsigned short *) page; | |
635 | char *out = ((char *)val) + (SECTOR_WORDS * 4); | |
636 | page = out; | |
637 | do { | |
638 | out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n'); | |
639 | val += 1; | |
640 | } while (i < (SECTOR_WORDS * 2)); | |
641 | len = out - page; | |
642 | } | |
643 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
644 | } | |
645 | ||
646 | static int proc_idedisk_read_smart_values | |
647 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
648 | { | |
649 | ide_drive_t *drive = (ide_drive_t *)data; | |
650 | int len = 0, i = 0; | |
651 | ||
652 | if (!get_smart_values(drive, page)) { | |
653 | unsigned short *val = (unsigned short *) page; | |
654 | char *out = ((char *)val) + (SECTOR_WORDS * 4); | |
655 | page = out; | |
656 | do { | |
657 | out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n'); | |
658 | val += 1; | |
659 | } while (i < (SECTOR_WORDS * 2)); | |
660 | len = out - page; | |
661 | } | |
662 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
663 | } | |
664 | ||
665 | static ide_proc_entry_t idedisk_proc[] = { | |
666 | { "cache", S_IFREG|S_IRUGO, proc_idedisk_read_cache, NULL }, | |
667 | { "capacity", S_IFREG|S_IRUGO, proc_idedisk_read_capacity, NULL }, | |
668 | { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, | |
669 | { "smart_values", S_IFREG|S_IRUSR, proc_idedisk_read_smart_values, NULL }, | |
670 | { "smart_thresholds", S_IFREG|S_IRUSR, proc_idedisk_read_smart_thresholds, NULL }, | |
671 | { NULL, 0, NULL, NULL } | |
672 | }; | |
673 | ||
674 | #else | |
675 | ||
676 | #define idedisk_proc NULL | |
677 | ||
678 | #endif /* CONFIG_PROC_FS */ | |
679 | ||
680 | static void idedisk_end_flush(request_queue_t *q, struct request *flush_rq) | |
681 | { | |
682 | ide_drive_t *drive = q->queuedata; | |
683 | struct request *rq = flush_rq->end_io_data; | |
684 | int good_sectors = rq->hard_nr_sectors; | |
685 | int bad_sectors; | |
686 | sector_t sector; | |
687 | ||
688 | if (flush_rq->errors & ABRT_ERR) { | |
689 | printk(KERN_ERR "%s: barrier support doesn't work\n", drive->name); | |
690 | blk_queue_ordered(drive->queue, QUEUE_ORDERED_NONE); | |
691 | blk_queue_issue_flush_fn(drive->queue, NULL); | |
692 | good_sectors = 0; | |
693 | } else if (flush_rq->errors) { | |
694 | good_sectors = 0; | |
695 | if (blk_barrier_preflush(rq)) { | |
696 | sector = ide_get_error_location(drive,flush_rq->buffer); | |
697 | if ((sector >= rq->hard_sector) && | |
698 | (sector < rq->hard_sector + rq->hard_nr_sectors)) | |
699 | good_sectors = sector - rq->hard_sector; | |
700 | } | |
701 | } | |
702 | ||
703 | if (flush_rq->errors) | |
704 | printk(KERN_ERR "%s: failed barrier write: " | |
705 | "sector=%Lx(good=%d/bad=%d)\n", | |
706 | drive->name, (unsigned long long)rq->sector, | |
707 | good_sectors, | |
708 | (int) (rq->hard_nr_sectors-good_sectors)); | |
709 | ||
710 | bad_sectors = rq->hard_nr_sectors - good_sectors; | |
711 | ||
712 | if (good_sectors) | |
713 | __ide_end_request(drive, rq, 1, good_sectors); | |
714 | if (bad_sectors) | |
715 | __ide_end_request(drive, rq, 0, bad_sectors); | |
716 | } | |
717 | ||
718 | static int idedisk_prepare_flush(request_queue_t *q, struct request *rq) | |
719 | { | |
720 | ide_drive_t *drive = q->queuedata; | |
721 | ||
722 | if (!drive->wcache) | |
723 | return 0; | |
724 | ||
725 | memset(rq->cmd, 0, sizeof(rq->cmd)); | |
726 | ||
727 | if (ide_id_has_flush_cache_ext(drive->id) && | |
728 | (drive->capacity64 >= (1UL << 28))) | |
729 | rq->cmd[0] = WIN_FLUSH_CACHE_EXT; | |
730 | else | |
731 | rq->cmd[0] = WIN_FLUSH_CACHE; | |
732 | ||
733 | ||
734 | rq->flags |= REQ_DRIVE_TASK | REQ_SOFTBARRIER; | |
735 | rq->buffer = rq->cmd; | |
736 | return 1; | |
737 | } | |
738 | ||
739 | static int idedisk_issue_flush(request_queue_t *q, struct gendisk *disk, | |
740 | sector_t *error_sector) | |
741 | { | |
742 | ide_drive_t *drive = q->queuedata; | |
743 | struct request *rq; | |
744 | int ret; | |
745 | ||
746 | if (!drive->wcache) | |
747 | return 0; | |
748 | ||
749 | rq = blk_get_request(q, WRITE, __GFP_WAIT); | |
750 | ||
751 | idedisk_prepare_flush(q, rq); | |
752 | ||
753 | ret = blk_execute_rq(q, disk, rq); | |
754 | ||
755 | /* | |
756 | * if we failed and caller wants error offset, get it | |
757 | */ | |
758 | if (ret && error_sector) | |
759 | *error_sector = ide_get_error_location(drive, rq->cmd); | |
760 | ||
761 | blk_put_request(rq); | |
762 | return ret; | |
763 | } | |
764 | ||
765 | /* | |
766 | * This is tightly woven into the driver->do_special can not touch. | |
767 | * DON'T do it again until a total personality rewrite is committed. | |
768 | */ | |
769 | static int set_multcount(ide_drive_t *drive, int arg) | |
770 | { | |
771 | struct request rq; | |
772 | ||
773 | if (drive->special.b.set_multmode) | |
774 | return -EBUSY; | |
775 | ide_init_drive_cmd (&rq); | |
776 | rq.flags = REQ_DRIVE_CMD; | |
777 | drive->mult_req = arg; | |
778 | drive->special.b.set_multmode = 1; | |
779 | (void) ide_do_drive_cmd (drive, &rq, ide_wait); | |
780 | return (drive->mult_count == arg) ? 0 : -EIO; | |
781 | } | |
782 | ||
783 | static int set_nowerr(ide_drive_t *drive, int arg) | |
784 | { | |
785 | if (ide_spin_wait_hwgroup(drive)) | |
786 | return -EBUSY; | |
787 | drive->nowerr = arg; | |
788 | drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT; | |
789 | spin_unlock_irq(&ide_lock); | |
790 | return 0; | |
791 | } | |
792 | ||
793 | static int write_cache(ide_drive_t *drive, int arg) | |
794 | { | |
795 | ide_task_t args; | |
796 | int err; | |
797 | ||
798 | if (!ide_id_has_flush_cache(drive->id)) | |
799 | return 1; | |
800 | ||
801 | memset(&args, 0, sizeof(ide_task_t)); | |
802 | args.tfRegister[IDE_FEATURE_OFFSET] = (arg) ? | |
803 | SETFEATURES_EN_WCACHE : SETFEATURES_DIS_WCACHE; | |
804 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SETFEATURES; | |
805 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
806 | args.handler = &task_no_data_intr; | |
807 | ||
808 | err = ide_raw_taskfile(drive, &args, NULL); | |
809 | if (err) | |
810 | return err; | |
811 | ||
812 | drive->wcache = arg; | |
813 | return 0; | |
814 | } | |
815 | ||
816 | static int do_idedisk_flushcache (ide_drive_t *drive) | |
817 | { | |
818 | ide_task_t args; | |
819 | ||
820 | memset(&args, 0, sizeof(ide_task_t)); | |
821 | if (ide_id_has_flush_cache_ext(drive->id)) | |
822 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_FLUSH_CACHE_EXT; | |
823 | else | |
824 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_FLUSH_CACHE; | |
825 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
826 | args.handler = &task_no_data_intr; | |
827 | return ide_raw_taskfile(drive, &args, NULL); | |
828 | } | |
829 | ||
830 | static int set_acoustic (ide_drive_t *drive, int arg) | |
831 | { | |
832 | ide_task_t args; | |
833 | ||
834 | memset(&args, 0, sizeof(ide_task_t)); | |
835 | args.tfRegister[IDE_FEATURE_OFFSET] = (arg) ? SETFEATURES_EN_AAM : | |
836 | SETFEATURES_DIS_AAM; | |
837 | args.tfRegister[IDE_NSECTOR_OFFSET] = arg; | |
838 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SETFEATURES; | |
839 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
840 | args.handler = &task_no_data_intr; | |
841 | ide_raw_taskfile(drive, &args, NULL); | |
842 | drive->acoustic = arg; | |
843 | return 0; | |
844 | } | |
845 | ||
846 | /* | |
847 | * drive->addressing: | |
848 | * 0: 28-bit | |
849 | * 1: 48-bit | |
850 | * 2: 48-bit capable doing 28-bit | |
851 | */ | |
852 | static int set_lba_addressing(ide_drive_t *drive, int arg) | |
853 | { | |
854 | drive->addressing = 0; | |
855 | ||
856 | if (HWIF(drive)->no_lba48) | |
857 | return 0; | |
858 | ||
859 | if (!idedisk_supports_lba48(drive->id)) | |
860 | return -EIO; | |
861 | drive->addressing = arg; | |
862 | return 0; | |
863 | } | |
864 | ||
865 | static void idedisk_add_settings(ide_drive_t *drive) | |
866 | { | |
867 | struct hd_driveid *id = drive->id; | |
868 | ||
869 | ide_add_setting(drive, "bios_cyl", SETTING_RW, -1, -1, TYPE_INT, 0, 65535, 1, 1, &drive->bios_cyl, NULL); | |
870 | ide_add_setting(drive, "bios_head", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); | |
871 | ide_add_setting(drive, "bios_sect", SETTING_RW, -1, -1, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); | |
872 | ide_add_setting(drive, "address", SETTING_RW, HDIO_GET_ADDRESS, HDIO_SET_ADDRESS, TYPE_INTA, 0, 2, 1, 1, &drive->addressing, set_lba_addressing); | |
873 | ide_add_setting(drive, "bswap", SETTING_READ, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->bswap, NULL); | |
874 | 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); | |
875 | ide_add_setting(drive, "nowerr", SETTING_RW, HDIO_GET_NOWERR, HDIO_SET_NOWERR, TYPE_BYTE, 0, 1, 1, 1, &drive->nowerr, set_nowerr); | |
876 | ide_add_setting(drive, "lun", SETTING_RW, -1, -1, TYPE_INT, 0, 7, 1, 1, &drive->lun, NULL); | |
877 | ide_add_setting(drive, "wcache", SETTING_RW, HDIO_GET_WCACHE, HDIO_SET_WCACHE, TYPE_BYTE, 0, 1, 1, 1, &drive->wcache, write_cache); | |
878 | ide_add_setting(drive, "acoustic", SETTING_RW, HDIO_GET_ACOUSTIC, HDIO_SET_ACOUSTIC, TYPE_BYTE, 0, 254, 1, 1, &drive->acoustic, set_acoustic); | |
879 | ide_add_setting(drive, "failures", SETTING_RW, -1, -1, TYPE_INT, 0, 65535, 1, 1, &drive->failures, NULL); | |
880 | ide_add_setting(drive, "max_failures", SETTING_RW, -1, -1, TYPE_INT, 0, 65535, 1, 1, &drive->max_failures, NULL); | |
881 | } | |
882 | ||
883 | static void idedisk_setup (ide_drive_t *drive) | |
884 | { | |
885 | struct hd_driveid *id = drive->id; | |
886 | unsigned long long capacity; | |
887 | int barrier; | |
888 | ||
889 | idedisk_add_settings(drive); | |
890 | ||
891 | if (drive->id_read == 0) | |
892 | return; | |
893 | ||
894 | /* | |
895 | * CompactFlash cards and their brethern look just like hard drives | |
896 | * to us, but they are removable and don't have a doorlock mechanism. | |
897 | */ | |
898 | if (drive->removable && !(drive->is_flash)) { | |
899 | /* | |
900 | * Removable disks (eg. SYQUEST); ignore 'WD' drives | |
901 | */ | |
902 | if (id->model[0] != 'W' || id->model[1] != 'D') { | |
903 | drive->doorlocking = 1; | |
904 | } | |
905 | } | |
906 | ||
907 | (void)set_lba_addressing(drive, 1); | |
908 | ||
909 | if (drive->addressing == 1) { | |
910 | ide_hwif_t *hwif = HWIF(drive); | |
911 | int max_s = 2048; | |
912 | ||
913 | if (max_s > hwif->rqsize) | |
914 | max_s = hwif->rqsize; | |
915 | ||
916 | blk_queue_max_sectors(drive->queue, max_s); | |
917 | } | |
918 | ||
919 | printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, drive->queue->max_sectors / 2); | |
920 | ||
921 | /* calculate drive capacity, and select LBA if possible */ | |
922 | init_idedisk_capacity (drive); | |
923 | ||
924 | /* limit drive capacity to 137GB if LBA48 cannot be used */ | |
925 | if (drive->addressing == 0 && drive->capacity64 > 1ULL << 28) { | |
926 | printk(KERN_WARNING "%s: cannot use LBA48 - full capacity " | |
927 | "%llu sectors (%llu MB)\n", | |
928 | drive->name, (unsigned long long)drive->capacity64, | |
929 | sectors_to_MB(drive->capacity64)); | |
930 | drive->capacity64 = 1ULL << 28; | |
931 | } | |
932 | ||
933 | if (drive->hwif->no_lba48_dma && drive->addressing) { | |
934 | if (drive->capacity64 > 1ULL << 28) { | |
935 | printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode will" | |
936 | " be used for accessing sectors > %u\n", | |
937 | drive->name, 1 << 28); | |
938 | } else | |
939 | drive->addressing = 0; | |
940 | } | |
941 | ||
942 | /* | |
943 | * if possible, give fdisk access to more of the drive, | |
944 | * by correcting bios_cyls: | |
945 | */ | |
946 | capacity = idedisk_capacity (drive); | |
947 | if (!drive->forced_geom) { | |
948 | ||
949 | if (idedisk_supports_lba48(drive->id)) { | |
950 | /* compatibility */ | |
951 | drive->bios_sect = 63; | |
952 | drive->bios_head = 255; | |
953 | } | |
954 | ||
955 | if (drive->bios_sect && drive->bios_head) { | |
956 | unsigned int cap0 = capacity; /* truncate to 32 bits */ | |
957 | unsigned int cylsz, cyl; | |
958 | ||
959 | if (cap0 != capacity) | |
960 | drive->bios_cyl = 65535; | |
961 | else { | |
962 | cylsz = drive->bios_sect * drive->bios_head; | |
963 | cyl = cap0 / cylsz; | |
964 | if (cyl > 65535) | |
965 | cyl = 65535; | |
966 | if (cyl > drive->bios_cyl) | |
967 | drive->bios_cyl = cyl; | |
968 | } | |
969 | } | |
970 | } | |
971 | printk(KERN_INFO "%s: %llu sectors (%llu MB)", | |
972 | drive->name, capacity, sectors_to_MB(capacity)); | |
973 | ||
974 | /* Only print cache size when it was specified */ | |
975 | if (id->buf_size) | |
976 | printk (" w/%dKiB Cache", id->buf_size/2); | |
977 | ||
978 | printk(", CHS=%d/%d/%d", | |
979 | drive->bios_cyl, drive->bios_head, drive->bios_sect); | |
980 | if (drive->using_dma) | |
981 | ide_dma_verbose(drive); | |
982 | printk("\n"); | |
983 | ||
984 | drive->no_io_32bit = id->dword_io ? 1 : 0; | |
985 | ||
986 | /* write cache enabled? */ | |
987 | if ((id->csfo & 1) || (id->cfs_enable_1 & (1 << 5))) | |
988 | drive->wcache = 1; | |
989 | ||
990 | write_cache(drive, 1); | |
991 | ||
992 | /* | |
993 | * We must avoid issuing commands a drive does not understand | |
994 | * or we may crash it. We check flush cache is supported. We also | |
995 | * check we have the LBA48 flush cache if the drive capacity is | |
996 | * too large. By this time we have trimmed the drive capacity if | |
997 | * LBA48 is not available so we don't need to recheck that. | |
998 | */ | |
999 | barrier = 0; | |
1000 | if (ide_id_has_flush_cache(id)) | |
1001 | barrier = 1; | |
1002 | if (drive->addressing == 1) { | |
1003 | /* Can't issue the correct flush ? */ | |
1004 | if (capacity > (1ULL << 28) && !ide_id_has_flush_cache_ext(id)) | |
1005 | barrier = 0; | |
1006 | } | |
1007 | ||
1008 | printk(KERN_INFO "%s: cache flushes %ssupported\n", | |
1009 | drive->name, barrier ? "" : "not "); | |
1010 | if (barrier) { | |
1011 | blk_queue_ordered(drive->queue, QUEUE_ORDERED_FLUSH); | |
1012 | drive->queue->prepare_flush_fn = idedisk_prepare_flush; | |
1013 | drive->queue->end_flush_fn = idedisk_end_flush; | |
1014 | blk_queue_issue_flush_fn(drive->queue, idedisk_issue_flush); | |
1015 | } | |
1016 | } | |
1017 | ||
1018 | static void ide_cacheflush_p(ide_drive_t *drive) | |
1019 | { | |
1020 | if (!drive->wcache || !ide_id_has_flush_cache(drive->id)) | |
1021 | return; | |
1022 | ||
1023 | if (do_idedisk_flushcache(drive)) | |
1024 | printk(KERN_INFO "%s: wcache flush failed!\n", drive->name); | |
1025 | } | |
1026 | ||
1027 | static int idedisk_cleanup (ide_drive_t *drive) | |
1028 | { | |
1029 | struct ide_disk_obj *idkp = drive->driver_data; | |
1030 | struct gendisk *g = idkp->disk; | |
1031 | ||
1032 | ide_cacheflush_p(drive); | |
1033 | if (ide_unregister_subdriver(drive)) | |
1034 | return 1; | |
1035 | del_gendisk(g); | |
1036 | ||
1037 | ide_disk_put(idkp); | |
1038 | ||
1039 | return 0; | |
1040 | } | |
1041 | ||
1042 | static void ide_disk_release(struct kref *kref) | |
1043 | { | |
1044 | struct ide_disk_obj *idkp = to_ide_disk(kref); | |
1045 | ide_drive_t *drive = idkp->drive; | |
1046 | struct gendisk *g = idkp->disk; | |
1047 | ||
1048 | drive->driver_data = NULL; | |
1049 | drive->devfs_name[0] = '\0'; | |
1050 | g->private_data = NULL; | |
1051 | put_disk(g); | |
1052 | kfree(idkp); | |
1053 | } | |
1054 | ||
1055 | static int idedisk_attach(ide_drive_t *drive); | |
1056 | ||
1057 | static void ide_device_shutdown(struct device *dev) | |
1058 | { | |
1059 | ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); | |
1060 | ||
1061 | #ifdef CONFIG_ALPHA | |
1062 | /* On Alpha, halt(8) doesn't actually turn the machine off, | |
1063 | it puts you into the sort of firmware monitor. Typically, | |
1064 | it's used to boot another kernel image, so it's not much | |
1065 | different from reboot(8). Therefore, we don't need to | |
1066 | spin down the disk in this case, especially since Alpha | |
1067 | firmware doesn't handle disks in standby mode properly. | |
1068 | On the other hand, it's reasonably safe to turn the power | |
1069 | off when the shutdown process reaches the firmware prompt, | |
1070 | as the firmware initialization takes rather long time - | |
1071 | at least 10 seconds, which should be sufficient for | |
1072 | the disk to expire its write cache. */ | |
1073 | if (system_state != SYSTEM_POWER_OFF) { | |
1074 | #else | |
1075 | if (system_state == SYSTEM_RESTART) { | |
1076 | #endif | |
1077 | ide_cacheflush_p(drive); | |
1078 | return; | |
1079 | } | |
1080 | ||
1081 | printk("Shutdown: %s\n", drive->name); | |
1082 | dev->bus->suspend(dev, PMSG_SUSPEND); | |
1083 | } | |
1084 | ||
1085 | /* | |
1086 | * IDE subdriver functions, registered with ide.c | |
1087 | */ | |
1088 | static ide_driver_t idedisk_driver = { | |
1089 | .owner = THIS_MODULE, | |
1090 | .gen_driver = { | |
1091 | .shutdown = ide_device_shutdown, | |
1092 | }, | |
1093 | .name = "ide-disk", | |
1094 | .version = IDEDISK_VERSION, | |
1095 | .media = ide_disk, | |
1096 | .busy = 0, | |
1097 | .supports_dsc_overlap = 0, | |
1098 | .cleanup = idedisk_cleanup, | |
1099 | .do_request = ide_do_rw_disk, | |
1100 | .end_request = ide_end_request, | |
1101 | .error = __ide_error, | |
1102 | .abort = __ide_abort, | |
1103 | .proc = idedisk_proc, | |
1104 | .attach = idedisk_attach, | |
1105 | .drives = LIST_HEAD_INIT(idedisk_driver.drives), | |
1106 | }; | |
1107 | ||
1108 | static int idedisk_open(struct inode *inode, struct file *filp) | |
1109 | { | |
1110 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
1111 | struct ide_disk_obj *idkp; | |
1112 | ide_drive_t *drive; | |
1113 | ||
1114 | if (!(idkp = ide_disk_get(disk))) | |
1115 | return -ENXIO; | |
1116 | ||
1117 | drive = idkp->drive; | |
1118 | ||
1119 | drive->usage++; | |
1120 | if (drive->removable && drive->usage == 1) { | |
1121 | ide_task_t args; | |
1122 | memset(&args, 0, sizeof(ide_task_t)); | |
1123 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_DOORLOCK; | |
1124 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
1125 | args.handler = &task_no_data_intr; | |
1126 | check_disk_change(inode->i_bdev); | |
1127 | /* | |
1128 | * Ignore the return code from door_lock, | |
1129 | * since the open() has already succeeded, | |
1130 | * and the door_lock is irrelevant at this point. | |
1131 | */ | |
1132 | if (drive->doorlocking && ide_raw_taskfile(drive, &args, NULL)) | |
1133 | drive->doorlocking = 0; | |
1134 | } | |
1135 | return 0; | |
1136 | } | |
1137 | ||
1138 | static int idedisk_release(struct inode *inode, struct file *filp) | |
1139 | { | |
1140 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
1141 | struct ide_disk_obj *idkp = ide_disk_g(disk); | |
1142 | ide_drive_t *drive = idkp->drive; | |
1143 | ||
1144 | if (drive->usage == 1) | |
1145 | ide_cacheflush_p(drive); | |
1146 | if (drive->removable && drive->usage == 1) { | |
1147 | ide_task_t args; | |
1148 | memset(&args, 0, sizeof(ide_task_t)); | |
1149 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_DOORUNLOCK; | |
1150 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
1151 | args.handler = &task_no_data_intr; | |
1152 | if (drive->doorlocking && ide_raw_taskfile(drive, &args, NULL)) | |
1153 | drive->doorlocking = 0; | |
1154 | } | |
1155 | drive->usage--; | |
1156 | ||
1157 | ide_disk_put(idkp); | |
1158 | ||
1159 | return 0; | |
1160 | } | |
1161 | ||
1162 | static int idedisk_ioctl(struct inode *inode, struct file *file, | |
1163 | unsigned int cmd, unsigned long arg) | |
1164 | { | |
1165 | struct block_device *bdev = inode->i_bdev; | |
1166 | struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk); | |
1167 | return generic_ide_ioctl(idkp->drive, file, bdev, cmd, arg); | |
1168 | } | |
1169 | ||
1170 | static int idedisk_media_changed(struct gendisk *disk) | |
1171 | { | |
1172 | struct ide_disk_obj *idkp = ide_disk_g(disk); | |
1173 | ide_drive_t *drive = idkp->drive; | |
1174 | ||
1175 | /* do not scan partitions twice if this is a removable device */ | |
1176 | if (drive->attach) { | |
1177 | drive->attach = 0; | |
1178 | return 0; | |
1179 | } | |
1180 | /* if removable, always assume it was changed */ | |
1181 | return drive->removable; | |
1182 | } | |
1183 | ||
1184 | static int idedisk_revalidate_disk(struct gendisk *disk) | |
1185 | { | |
1186 | struct ide_disk_obj *idkp = ide_disk_g(disk); | |
1187 | set_capacity(disk, idedisk_capacity(idkp->drive)); | |
1188 | return 0; | |
1189 | } | |
1190 | ||
1191 | static struct block_device_operations idedisk_ops = { | |
1192 | .owner = THIS_MODULE, | |
1193 | .open = idedisk_open, | |
1194 | .release = idedisk_release, | |
1195 | .ioctl = idedisk_ioctl, | |
1196 | .media_changed = idedisk_media_changed, | |
1197 | .revalidate_disk= idedisk_revalidate_disk | |
1198 | }; | |
1199 | ||
1200 | MODULE_DESCRIPTION("ATA DISK Driver"); | |
1201 | ||
1202 | static int idedisk_attach(ide_drive_t *drive) | |
1203 | { | |
1204 | struct ide_disk_obj *idkp; | |
1205 | struct gendisk *g; | |
1206 | ||
1207 | /* strstr("foo", "") is non-NULL */ | |
1208 | if (!strstr("ide-disk", drive->driver_req)) | |
1209 | goto failed; | |
1210 | if (!drive->present) | |
1211 | goto failed; | |
1212 | if (drive->media != ide_disk) | |
1213 | goto failed; | |
1214 | ||
1215 | idkp = kmalloc(sizeof(*idkp), GFP_KERNEL); | |
1216 | if (!idkp) | |
1217 | goto failed; | |
1218 | ||
1219 | g = alloc_disk(1 << PARTN_BITS); | |
1220 | if (!g) | |
1221 | goto out_free_idkp; | |
1222 | ||
1223 | ide_init_disk(g, drive); | |
1224 | ||
1225 | if (ide_register_subdriver(drive, &idedisk_driver)) { | |
1226 | printk (KERN_ERR "ide-disk: %s: Failed to register the driver with ide.c\n", drive->name); | |
1227 | goto out_put_disk; | |
1228 | } | |
1229 | ||
1230 | memset(idkp, 0, sizeof(*idkp)); | |
1231 | ||
1232 | kref_init(&idkp->kref); | |
1233 | ||
1234 | idkp->drive = drive; | |
1235 | idkp->driver = &idedisk_driver; | |
1236 | idkp->disk = g; | |
1237 | ||
1238 | g->private_data = &idkp->driver; | |
1239 | ||
1240 | drive->driver_data = idkp; | |
1241 | ||
1242 | DRIVER(drive)->busy++; | |
1243 | idedisk_setup(drive); | |
1244 | if ((!drive->head || drive->head > 16) && !drive->select.b.lba) { | |
1245 | printk(KERN_ERR "%s: INVALID GEOMETRY: %d PHYSICAL HEADS?\n", | |
1246 | drive->name, drive->head); | |
1247 | drive->attach = 0; | |
1248 | } else | |
1249 | drive->attach = 1; | |
1250 | DRIVER(drive)->busy--; | |
1251 | g->minors = 1 << PARTN_BITS; | |
1252 | strcpy(g->devfs_name, drive->devfs_name); | |
1253 | g->driverfs_dev = &drive->gendev; | |
1254 | g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; | |
1255 | set_capacity(g, idedisk_capacity(drive)); | |
1256 | g->fops = &idedisk_ops; | |
1257 | add_disk(g); | |
1258 | return 0; | |
1259 | ||
1260 | out_put_disk: | |
1261 | put_disk(g); | |
1262 | out_free_idkp: | |
1263 | kfree(idkp); | |
1264 | failed: | |
1265 | return 1; | |
1266 | } | |
1267 | ||
1268 | static void __exit idedisk_exit (void) | |
1269 | { | |
1270 | ide_unregister_driver(&idedisk_driver); | |
1271 | } | |
1272 | ||
1273 | static int idedisk_init (void) | |
1274 | { | |
1275 | return ide_register_driver(&idedisk_driver); | |
1276 | } | |
1277 | ||
1278 | module_init(idedisk_init); | |
1279 | module_exit(idedisk_exit); | |
1280 | MODULE_LICENSE("GPL"); |