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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 | ||
6efd9360 AC |
122 | /* No non-LBA info .. so valid! */ |
123 | if (id->cyls == 0) | |
124 | return 1; | |
125 | ||
1da177e4 LT |
126 | /* |
127 | * The ATA spec tells large drives to return | |
128 | * C/H/S = 16383/16/63 independent of their size. | |
129 | * Some drives can be jumpered to use 15 heads instead of 16. | |
130 | * Some drives can be jumpered to use 4092 cyls instead of 16383. | |
131 | */ | |
132 | if ((id->cyls == 16383 | |
133 | || (id->cyls == 4092 && id->cur_cyls == 16383)) && | |
134 | id->sectors == 63 && | |
135 | (id->heads == 15 || id->heads == 16) && | |
136 | (id->lba_capacity >= 16383*63*id->heads)) | |
137 | return 1; | |
138 | ||
139 | lba_sects = id->lba_capacity; | |
140 | chs_sects = id->cyls * id->heads * id->sectors; | |
141 | ||
142 | /* perform a rough sanity check on lba_sects: within 10% is OK */ | |
143 | if ((lba_sects - chs_sects) < chs_sects/10) | |
144 | return 1; | |
145 | ||
146 | /* some drives have the word order reversed */ | |
147 | head = ((lba_sects >> 16) & 0xffff); | |
148 | tail = (lba_sects & 0xffff); | |
149 | lba_sects = (head | (tail << 16)); | |
150 | if ((lba_sects - chs_sects) < chs_sects/10) { | |
151 | id->lba_capacity = lba_sects; | |
152 | return 1; /* lba_capacity is (now) good */ | |
153 | } | |
154 | ||
155 | return 0; /* lba_capacity value may be bad */ | |
156 | } | |
157 | ||
158 | /* | |
159 | * __ide_do_rw_disk() issues READ and WRITE commands to a disk, | |
160 | * using LBA if supported, or CHS otherwise, to address sectors. | |
161 | */ | |
162 | static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq, sector_t block) | |
163 | { | |
164 | ide_hwif_t *hwif = HWIF(drive); | |
165 | unsigned int dma = drive->using_dma; | |
166 | u8 lba48 = (drive->addressing == 1) ? 1 : 0; | |
167 | task_ioreg_t command = WIN_NOP; | |
168 | ata_nsector_t nsectors; | |
169 | ||
170 | nsectors.all = (u16) rq->nr_sectors; | |
171 | ||
172 | if (hwif->no_lba48_dma && lba48 && dma) { | |
173 | if (block + rq->nr_sectors > 1ULL << 28) | |
174 | dma = 0; | |
175 | else | |
176 | lba48 = 0; | |
177 | } | |
178 | ||
179 | if (!dma) { | |
180 | ide_init_sg_cmd(drive, rq); | |
181 | ide_map_sg(drive, rq); | |
182 | } | |
183 | ||
184 | if (IDE_CONTROL_REG) | |
185 | hwif->OUTB(drive->ctl, IDE_CONTROL_REG); | |
186 | ||
187 | /* FIXME: SELECT_MASK(drive, 0) ? */ | |
188 | ||
189 | if (drive->select.b.lba) { | |
190 | if (lba48) { | |
191 | task_ioreg_t tasklets[10]; | |
192 | ||
193 | pr_debug("%s: LBA=0x%012llx\n", drive->name, block); | |
194 | ||
195 | tasklets[0] = 0; | |
196 | tasklets[1] = 0; | |
197 | tasklets[2] = nsectors.b.low; | |
198 | tasklets[3] = nsectors.b.high; | |
199 | tasklets[4] = (task_ioreg_t) block; | |
200 | tasklets[5] = (task_ioreg_t) (block>>8); | |
201 | tasklets[6] = (task_ioreg_t) (block>>16); | |
202 | tasklets[7] = (task_ioreg_t) (block>>24); | |
203 | if (sizeof(block) == 4) { | |
204 | tasklets[8] = (task_ioreg_t) 0; | |
205 | tasklets[9] = (task_ioreg_t) 0; | |
206 | } else { | |
207 | tasklets[8] = (task_ioreg_t)((u64)block >> 32); | |
208 | tasklets[9] = (task_ioreg_t)((u64)block >> 40); | |
209 | } | |
210 | #ifdef DEBUG | |
211 | printk("%s: 0x%02x%02x 0x%02x%02x%02x%02x%02x%02x\n", | |
212 | drive->name, tasklets[3], tasklets[2], | |
213 | tasklets[9], tasklets[8], tasklets[7], | |
214 | tasklets[6], tasklets[5], tasklets[4]); | |
215 | #endif | |
216 | hwif->OUTB(tasklets[1], IDE_FEATURE_REG); | |
217 | hwif->OUTB(tasklets[3], IDE_NSECTOR_REG); | |
218 | hwif->OUTB(tasklets[7], IDE_SECTOR_REG); | |
219 | hwif->OUTB(tasklets[8], IDE_LCYL_REG); | |
220 | hwif->OUTB(tasklets[9], IDE_HCYL_REG); | |
221 | ||
222 | hwif->OUTB(tasklets[0], IDE_FEATURE_REG); | |
223 | hwif->OUTB(tasklets[2], IDE_NSECTOR_REG); | |
224 | hwif->OUTB(tasklets[4], IDE_SECTOR_REG); | |
225 | hwif->OUTB(tasklets[5], IDE_LCYL_REG); | |
226 | hwif->OUTB(tasklets[6], IDE_HCYL_REG); | |
227 | hwif->OUTB(0x00|drive->select.all,IDE_SELECT_REG); | |
228 | } else { | |
229 | hwif->OUTB(0x00, IDE_FEATURE_REG); | |
230 | hwif->OUTB(nsectors.b.low, IDE_NSECTOR_REG); | |
231 | hwif->OUTB(block, IDE_SECTOR_REG); | |
232 | hwif->OUTB(block>>=8, IDE_LCYL_REG); | |
233 | hwif->OUTB(block>>=8, IDE_HCYL_REG); | |
234 | hwif->OUTB(((block>>8)&0x0f)|drive->select.all,IDE_SELECT_REG); | |
235 | } | |
236 | } else { | |
237 | unsigned int sect,head,cyl,track; | |
238 | track = (int)block / drive->sect; | |
239 | sect = (int)block % drive->sect + 1; | |
240 | hwif->OUTB(sect, IDE_SECTOR_REG); | |
241 | head = track % drive->head; | |
242 | cyl = track / drive->head; | |
243 | ||
244 | pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect); | |
245 | ||
246 | hwif->OUTB(0x00, IDE_FEATURE_REG); | |
247 | hwif->OUTB(nsectors.b.low, IDE_NSECTOR_REG); | |
248 | hwif->OUTB(cyl, IDE_LCYL_REG); | |
249 | hwif->OUTB(cyl>>8, IDE_HCYL_REG); | |
250 | hwif->OUTB(head|drive->select.all,IDE_SELECT_REG); | |
251 | } | |
252 | ||
253 | if (dma) { | |
254 | if (!hwif->dma_setup(drive)) { | |
255 | if (rq_data_dir(rq)) { | |
256 | command = lba48 ? WIN_WRITEDMA_EXT : WIN_WRITEDMA; | |
257 | if (drive->vdma) | |
258 | command = lba48 ? WIN_WRITE_EXT: WIN_WRITE; | |
259 | } else { | |
260 | command = lba48 ? WIN_READDMA_EXT : WIN_READDMA; | |
261 | if (drive->vdma) | |
262 | command = lba48 ? WIN_READ_EXT: WIN_READ; | |
263 | } | |
264 | hwif->dma_exec_cmd(drive, command); | |
265 | hwif->dma_start(drive); | |
266 | return ide_started; | |
267 | } | |
268 | /* fallback to PIO */ | |
269 | ide_init_sg_cmd(drive, rq); | |
270 | } | |
271 | ||
272 | if (rq_data_dir(rq) == READ) { | |
273 | ||
274 | if (drive->mult_count) { | |
275 | hwif->data_phase = TASKFILE_MULTI_IN; | |
276 | command = lba48 ? WIN_MULTREAD_EXT : WIN_MULTREAD; | |
277 | } else { | |
278 | hwif->data_phase = TASKFILE_IN; | |
279 | command = lba48 ? WIN_READ_EXT : WIN_READ; | |
280 | } | |
281 | ||
282 | ide_execute_command(drive, command, &task_in_intr, WAIT_CMD, NULL); | |
283 | return ide_started; | |
284 | } else { | |
285 | if (drive->mult_count) { | |
286 | hwif->data_phase = TASKFILE_MULTI_OUT; | |
287 | command = lba48 ? WIN_MULTWRITE_EXT : WIN_MULTWRITE; | |
288 | } else { | |
289 | hwif->data_phase = TASKFILE_OUT; | |
290 | command = lba48 ? WIN_WRITE_EXT : WIN_WRITE; | |
291 | } | |
292 | ||
293 | /* FIXME: ->OUTBSYNC ? */ | |
294 | hwif->OUTB(command, IDE_COMMAND_REG); | |
295 | ||
296 | return pre_task_out_intr(drive, rq); | |
297 | } | |
298 | } | |
299 | ||
300 | /* | |
301 | * 268435455 == 137439 MB or 28bit limit | |
302 | * 320173056 == 163929 MB or 48bit addressing | |
303 | * 1073741822 == 549756 MB or 48bit addressing fake drive | |
304 | */ | |
305 | ||
306 | static ide_startstop_t ide_do_rw_disk (ide_drive_t *drive, struct request *rq, sector_t block) | |
307 | { | |
308 | ide_hwif_t *hwif = HWIF(drive); | |
309 | ||
310 | BUG_ON(drive->blocked); | |
311 | ||
312 | if (!blk_fs_request(rq)) { | |
313 | blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command"); | |
314 | ide_end_request(drive, 0, 0); | |
315 | return ide_stopped; | |
316 | } | |
317 | ||
318 | pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n", | |
319 | drive->name, rq_data_dir(rq) == READ ? "read" : "writ", | |
320 | block, rq->nr_sectors, (unsigned long)rq->buffer); | |
321 | ||
322 | if (hwif->rw_disk) | |
323 | hwif->rw_disk(drive, rq); | |
324 | ||
325 | return __ide_do_rw_disk(drive, rq, block); | |
326 | } | |
327 | ||
328 | /* | |
329 | * Queries for true maximum capacity of the drive. | |
330 | * Returns maximum LBA address (> 0) of the drive, 0 if failed. | |
331 | */ | |
332 | static unsigned long idedisk_read_native_max_address(ide_drive_t *drive) | |
333 | { | |
334 | ide_task_t args; | |
335 | unsigned long addr = 0; | |
336 | ||
337 | /* Create IDE/ATA command request structure */ | |
338 | memset(&args, 0, sizeof(ide_task_t)); | |
339 | args.tfRegister[IDE_SELECT_OFFSET] = 0x40; | |
340 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_READ_NATIVE_MAX; | |
341 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
342 | args.handler = &task_no_data_intr; | |
343 | /* submit command request */ | |
344 | ide_raw_taskfile(drive, &args, NULL); | |
345 | ||
346 | /* if OK, compute maximum address value */ | |
347 | if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) { | |
348 | addr = ((args.tfRegister[IDE_SELECT_OFFSET] & 0x0f) << 24) | |
349 | | ((args.tfRegister[ IDE_HCYL_OFFSET] ) << 16) | |
350 | | ((args.tfRegister[ IDE_LCYL_OFFSET] ) << 8) | |
351 | | ((args.tfRegister[IDE_SECTOR_OFFSET] )); | |
352 | addr++; /* since the return value is (maxlba - 1), we add 1 */ | |
353 | } | |
354 | return addr; | |
355 | } | |
356 | ||
357 | static unsigned long long idedisk_read_native_max_address_ext(ide_drive_t *drive) | |
358 | { | |
359 | ide_task_t args; | |
360 | unsigned long long addr = 0; | |
361 | ||
362 | /* Create IDE/ATA command request structure */ | |
363 | memset(&args, 0, sizeof(ide_task_t)); | |
364 | ||
365 | args.tfRegister[IDE_SELECT_OFFSET] = 0x40; | |
366 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_READ_NATIVE_MAX_EXT; | |
367 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
368 | args.handler = &task_no_data_intr; | |
369 | /* submit command request */ | |
370 | ide_raw_taskfile(drive, &args, NULL); | |
371 | ||
372 | /* if OK, compute maximum address value */ | |
373 | if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) { | |
374 | u32 high = (args.hobRegister[IDE_HCYL_OFFSET] << 16) | | |
375 | (args.hobRegister[IDE_LCYL_OFFSET] << 8) | | |
376 | args.hobRegister[IDE_SECTOR_OFFSET]; | |
377 | u32 low = ((args.tfRegister[IDE_HCYL_OFFSET])<<16) | | |
378 | ((args.tfRegister[IDE_LCYL_OFFSET])<<8) | | |
379 | (args.tfRegister[IDE_SECTOR_OFFSET]); | |
380 | addr = ((__u64)high << 24) | low; | |
381 | addr++; /* since the return value is (maxlba - 1), we add 1 */ | |
382 | } | |
383 | return addr; | |
384 | } | |
385 | ||
386 | /* | |
387 | * Sets maximum virtual LBA address of the drive. | |
388 | * Returns new maximum virtual LBA address (> 0) or 0 on failure. | |
389 | */ | |
390 | static unsigned long idedisk_set_max_address(ide_drive_t *drive, unsigned long addr_req) | |
391 | { | |
392 | ide_task_t args; | |
393 | unsigned long addr_set = 0; | |
394 | ||
395 | addr_req--; | |
396 | /* Create IDE/ATA command request structure */ | |
397 | memset(&args, 0, sizeof(ide_task_t)); | |
398 | args.tfRegister[IDE_SECTOR_OFFSET] = ((addr_req >> 0) & 0xff); | |
399 | args.tfRegister[IDE_LCYL_OFFSET] = ((addr_req >> 8) & 0xff); | |
400 | args.tfRegister[IDE_HCYL_OFFSET] = ((addr_req >> 16) & 0xff); | |
401 | args.tfRegister[IDE_SELECT_OFFSET] = ((addr_req >> 24) & 0x0f) | 0x40; | |
402 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SET_MAX; | |
403 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
404 | args.handler = &task_no_data_intr; | |
405 | /* submit command request */ | |
406 | ide_raw_taskfile(drive, &args, NULL); | |
407 | /* if OK, read new maximum address value */ | |
408 | if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) { | |
409 | addr_set = ((args.tfRegister[IDE_SELECT_OFFSET] & 0x0f) << 24) | |
410 | | ((args.tfRegister[ IDE_HCYL_OFFSET] ) << 16) | |
411 | | ((args.tfRegister[ IDE_LCYL_OFFSET] ) << 8) | |
412 | | ((args.tfRegister[IDE_SECTOR_OFFSET] )); | |
413 | addr_set++; | |
414 | } | |
415 | return addr_set; | |
416 | } | |
417 | ||
418 | static unsigned long long idedisk_set_max_address_ext(ide_drive_t *drive, unsigned long long addr_req) | |
419 | { | |
420 | ide_task_t args; | |
421 | unsigned long long addr_set = 0; | |
422 | ||
423 | addr_req--; | |
424 | /* Create IDE/ATA command request structure */ | |
425 | memset(&args, 0, sizeof(ide_task_t)); | |
426 | args.tfRegister[IDE_SECTOR_OFFSET] = ((addr_req >> 0) & 0xff); | |
427 | args.tfRegister[IDE_LCYL_OFFSET] = ((addr_req >>= 8) & 0xff); | |
428 | args.tfRegister[IDE_HCYL_OFFSET] = ((addr_req >>= 8) & 0xff); | |
429 | args.tfRegister[IDE_SELECT_OFFSET] = 0x40; | |
430 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SET_MAX_EXT; | |
431 | args.hobRegister[IDE_SECTOR_OFFSET] = (addr_req >>= 8) & 0xff; | |
432 | args.hobRegister[IDE_LCYL_OFFSET] = (addr_req >>= 8) & 0xff; | |
433 | args.hobRegister[IDE_HCYL_OFFSET] = (addr_req >>= 8) & 0xff; | |
434 | args.hobRegister[IDE_SELECT_OFFSET] = 0x40; | |
435 | args.hobRegister[IDE_CONTROL_OFFSET_HOB]= (drive->ctl|0x80); | |
436 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
437 | args.handler = &task_no_data_intr; | |
438 | /* submit command request */ | |
439 | ide_raw_taskfile(drive, &args, NULL); | |
440 | /* if OK, compute maximum address value */ | |
441 | if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) { | |
442 | u32 high = (args.hobRegister[IDE_HCYL_OFFSET] << 16) | | |
443 | (args.hobRegister[IDE_LCYL_OFFSET] << 8) | | |
444 | args.hobRegister[IDE_SECTOR_OFFSET]; | |
445 | u32 low = ((args.tfRegister[IDE_HCYL_OFFSET])<<16) | | |
446 | ((args.tfRegister[IDE_LCYL_OFFSET])<<8) | | |
447 | (args.tfRegister[IDE_SECTOR_OFFSET]); | |
448 | addr_set = ((__u64)high << 24) | low; | |
449 | addr_set++; | |
450 | } | |
451 | return addr_set; | |
452 | } | |
453 | ||
454 | static unsigned long long sectors_to_MB(unsigned long long n) | |
455 | { | |
456 | n <<= 9; /* make it bytes */ | |
457 | do_div(n, 1000000); /* make it MB */ | |
458 | return n; | |
459 | } | |
460 | ||
461 | /* | |
462 | * Bits 10 of command_set_1 and cfs_enable_1 must be equal, | |
463 | * so on non-buggy drives we need test only one. | |
464 | * However, we should also check whether these fields are valid. | |
465 | */ | |
466 | static inline int idedisk_supports_hpa(const struct hd_driveid *id) | |
467 | { | |
468 | return (id->command_set_1 & 0x0400) && (id->cfs_enable_1 & 0x0400); | |
469 | } | |
470 | ||
471 | /* | |
472 | * The same here. | |
473 | */ | |
474 | static inline int idedisk_supports_lba48(const struct hd_driveid *id) | |
475 | { | |
476 | return (id->command_set_2 & 0x0400) && (id->cfs_enable_2 & 0x0400) | |
477 | && id->lba_capacity_2; | |
478 | } | |
479 | ||
480 | static inline void idedisk_check_hpa(ide_drive_t *drive) | |
481 | { | |
482 | unsigned long long capacity, set_max; | |
483 | int lba48 = idedisk_supports_lba48(drive->id); | |
484 | ||
485 | capacity = drive->capacity64; | |
486 | if (lba48) | |
487 | set_max = idedisk_read_native_max_address_ext(drive); | |
488 | else | |
489 | set_max = idedisk_read_native_max_address(drive); | |
490 | ||
491 | if (set_max <= capacity) | |
492 | return; | |
493 | ||
494 | printk(KERN_INFO "%s: Host Protected Area detected.\n" | |
495 | "\tcurrent capacity is %llu sectors (%llu MB)\n" | |
496 | "\tnative capacity is %llu sectors (%llu MB)\n", | |
497 | drive->name, | |
498 | capacity, sectors_to_MB(capacity), | |
499 | set_max, sectors_to_MB(set_max)); | |
500 | ||
501 | if (lba48) | |
502 | set_max = idedisk_set_max_address_ext(drive, set_max); | |
503 | else | |
504 | set_max = idedisk_set_max_address(drive, set_max); | |
505 | if (set_max) { | |
506 | drive->capacity64 = set_max; | |
507 | printk(KERN_INFO "%s: Host Protected Area disabled.\n", | |
508 | drive->name); | |
509 | } | |
510 | } | |
511 | ||
512 | /* | |
513 | * Compute drive->capacity, the full capacity of the drive | |
514 | * Called with drive->id != NULL. | |
515 | * | |
516 | * To compute capacity, this uses either of | |
517 | * | |
518 | * 1. CHS value set by user (whatever user sets will be trusted) | |
519 | * 2. LBA value from target drive (require new ATA feature) | |
520 | * 3. LBA value from system BIOS (new one is OK, old one may break) | |
521 | * 4. CHS value from system BIOS (traditional style) | |
522 | * | |
523 | * in above order (i.e., if value of higher priority is available, | |
524 | * reset will be ignored). | |
525 | */ | |
526 | static void init_idedisk_capacity (ide_drive_t *drive) | |
527 | { | |
528 | struct hd_driveid *id = drive->id; | |
529 | /* | |
530 | * If this drive supports the Host Protected Area feature set, | |
531 | * then we may need to change our opinion about the drive's capacity. | |
532 | */ | |
533 | int hpa = idedisk_supports_hpa(id); | |
534 | ||
535 | if (idedisk_supports_lba48(id)) { | |
536 | /* drive speaks 48-bit LBA */ | |
537 | drive->select.b.lba = 1; | |
538 | drive->capacity64 = id->lba_capacity_2; | |
539 | if (hpa) | |
540 | idedisk_check_hpa(drive); | |
541 | } else if ((id->capability & 2) && lba_capacity_is_ok(id)) { | |
542 | /* drive speaks 28-bit LBA */ | |
543 | drive->select.b.lba = 1; | |
544 | drive->capacity64 = id->lba_capacity; | |
545 | if (hpa) | |
546 | idedisk_check_hpa(drive); | |
547 | } else { | |
548 | /* drive speaks boring old 28-bit CHS */ | |
549 | drive->capacity64 = drive->cyl * drive->head * drive->sect; | |
550 | } | |
551 | } | |
552 | ||
553 | static sector_t idedisk_capacity (ide_drive_t *drive) | |
554 | { | |
555 | return drive->capacity64 - drive->sect0; | |
556 | } | |
557 | ||
558 | #ifdef CONFIG_PROC_FS | |
559 | ||
560 | static int smart_enable(ide_drive_t *drive) | |
561 | { | |
562 | ide_task_t args; | |
563 | ||
564 | memset(&args, 0, sizeof(ide_task_t)); | |
565 | args.tfRegister[IDE_FEATURE_OFFSET] = SMART_ENABLE; | |
566 | args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS; | |
567 | args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS; | |
568 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART; | |
569 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
570 | args.handler = &task_no_data_intr; | |
571 | return ide_raw_taskfile(drive, &args, NULL); | |
572 | } | |
573 | ||
574 | static int get_smart_values(ide_drive_t *drive, u8 *buf) | |
575 | { | |
576 | ide_task_t args; | |
577 | ||
578 | memset(&args, 0, sizeof(ide_task_t)); | |
579 | args.tfRegister[IDE_FEATURE_OFFSET] = SMART_READ_VALUES; | |
580 | args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01; | |
581 | args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS; | |
582 | args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS; | |
583 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART; | |
584 | args.command_type = IDE_DRIVE_TASK_IN; | |
585 | args.data_phase = TASKFILE_IN; | |
586 | args.handler = &task_in_intr; | |
587 | (void) smart_enable(drive); | |
588 | return ide_raw_taskfile(drive, &args, buf); | |
589 | } | |
590 | ||
591 | static int get_smart_thresholds(ide_drive_t *drive, u8 *buf) | |
592 | { | |
593 | ide_task_t args; | |
594 | memset(&args, 0, sizeof(ide_task_t)); | |
595 | args.tfRegister[IDE_FEATURE_OFFSET] = SMART_READ_THRESHOLDS; | |
596 | args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01; | |
597 | args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS; | |
598 | args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS; | |
599 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART; | |
600 | args.command_type = IDE_DRIVE_TASK_IN; | |
601 | args.data_phase = TASKFILE_IN; | |
602 | args.handler = &task_in_intr; | |
603 | (void) smart_enable(drive); | |
604 | return ide_raw_taskfile(drive, &args, buf); | |
605 | } | |
606 | ||
607 | static int proc_idedisk_read_cache | |
608 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
609 | { | |
610 | ide_drive_t *drive = (ide_drive_t *) data; | |
611 | char *out = page; | |
612 | int len; | |
613 | ||
614 | if (drive->id_read) | |
615 | len = sprintf(out,"%i\n", drive->id->buf_size / 2); | |
616 | else | |
617 | len = sprintf(out,"(none)\n"); | |
618 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
619 | } | |
620 | ||
621 | static int proc_idedisk_read_capacity | |
622 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
623 | { | |
624 | ide_drive_t*drive = (ide_drive_t *)data; | |
625 | int len; | |
626 | ||
627 | len = sprintf(page,"%llu\n", (long long)idedisk_capacity(drive)); | |
628 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
629 | } | |
630 | ||
631 | static int proc_idedisk_read_smart_thresholds | |
632 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
633 | { | |
634 | ide_drive_t *drive = (ide_drive_t *)data; | |
635 | int len = 0, i = 0; | |
636 | ||
637 | if (!get_smart_thresholds(drive, page)) { | |
638 | unsigned short *val = (unsigned short *) page; | |
639 | char *out = ((char *)val) + (SECTOR_WORDS * 4); | |
640 | page = out; | |
641 | do { | |
642 | out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n'); | |
643 | val += 1; | |
644 | } while (i < (SECTOR_WORDS * 2)); | |
645 | len = out - page; | |
646 | } | |
647 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
648 | } | |
649 | ||
650 | static int proc_idedisk_read_smart_values | |
651 | (char *page, char **start, off_t off, int count, int *eof, void *data) | |
652 | { | |
653 | ide_drive_t *drive = (ide_drive_t *)data; | |
654 | int len = 0, i = 0; | |
655 | ||
656 | if (!get_smart_values(drive, page)) { | |
657 | unsigned short *val = (unsigned short *) page; | |
658 | char *out = ((char *)val) + (SECTOR_WORDS * 4); | |
659 | page = out; | |
660 | do { | |
661 | out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n'); | |
662 | val += 1; | |
663 | } while (i < (SECTOR_WORDS * 2)); | |
664 | len = out - page; | |
665 | } | |
666 | PROC_IDE_READ_RETURN(page,start,off,count,eof,len); | |
667 | } | |
668 | ||
669 | static ide_proc_entry_t idedisk_proc[] = { | |
670 | { "cache", S_IFREG|S_IRUGO, proc_idedisk_read_cache, NULL }, | |
671 | { "capacity", S_IFREG|S_IRUGO, proc_idedisk_read_capacity, NULL }, | |
672 | { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, | |
673 | { "smart_values", S_IFREG|S_IRUSR, proc_idedisk_read_smart_values, NULL }, | |
674 | { "smart_thresholds", S_IFREG|S_IRUSR, proc_idedisk_read_smart_thresholds, NULL }, | |
675 | { NULL, 0, NULL, NULL } | |
676 | }; | |
677 | ||
678 | #else | |
679 | ||
680 | #define idedisk_proc NULL | |
681 | ||
682 | #endif /* CONFIG_PROC_FS */ | |
683 | ||
684 | static void idedisk_end_flush(request_queue_t *q, struct request *flush_rq) | |
685 | { | |
686 | ide_drive_t *drive = q->queuedata; | |
687 | struct request *rq = flush_rq->end_io_data; | |
688 | int good_sectors = rq->hard_nr_sectors; | |
689 | int bad_sectors; | |
690 | sector_t sector; | |
691 | ||
692 | if (flush_rq->errors & ABRT_ERR) { | |
693 | printk(KERN_ERR "%s: barrier support doesn't work\n", drive->name); | |
694 | blk_queue_ordered(drive->queue, QUEUE_ORDERED_NONE); | |
695 | blk_queue_issue_flush_fn(drive->queue, NULL); | |
696 | good_sectors = 0; | |
697 | } else if (flush_rq->errors) { | |
698 | good_sectors = 0; | |
699 | if (blk_barrier_preflush(rq)) { | |
700 | sector = ide_get_error_location(drive,flush_rq->buffer); | |
701 | if ((sector >= rq->hard_sector) && | |
702 | (sector < rq->hard_sector + rq->hard_nr_sectors)) | |
703 | good_sectors = sector - rq->hard_sector; | |
704 | } | |
705 | } | |
706 | ||
707 | if (flush_rq->errors) | |
708 | printk(KERN_ERR "%s: failed barrier write: " | |
709 | "sector=%Lx(good=%d/bad=%d)\n", | |
710 | drive->name, (unsigned long long)rq->sector, | |
711 | good_sectors, | |
712 | (int) (rq->hard_nr_sectors-good_sectors)); | |
713 | ||
714 | bad_sectors = rq->hard_nr_sectors - good_sectors; | |
715 | ||
716 | if (good_sectors) | |
717 | __ide_end_request(drive, rq, 1, good_sectors); | |
718 | if (bad_sectors) | |
719 | __ide_end_request(drive, rq, 0, bad_sectors); | |
720 | } | |
721 | ||
722 | static int idedisk_prepare_flush(request_queue_t *q, struct request *rq) | |
723 | { | |
724 | ide_drive_t *drive = q->queuedata; | |
725 | ||
726 | if (!drive->wcache) | |
727 | return 0; | |
728 | ||
729 | memset(rq->cmd, 0, sizeof(rq->cmd)); | |
730 | ||
731 | if (ide_id_has_flush_cache_ext(drive->id) && | |
732 | (drive->capacity64 >= (1UL << 28))) | |
733 | rq->cmd[0] = WIN_FLUSH_CACHE_EXT; | |
734 | else | |
735 | rq->cmd[0] = WIN_FLUSH_CACHE; | |
736 | ||
737 | ||
738 | rq->flags |= REQ_DRIVE_TASK | REQ_SOFTBARRIER; | |
739 | rq->buffer = rq->cmd; | |
740 | return 1; | |
741 | } | |
742 | ||
743 | static int idedisk_issue_flush(request_queue_t *q, struct gendisk *disk, | |
744 | sector_t *error_sector) | |
745 | { | |
746 | ide_drive_t *drive = q->queuedata; | |
747 | struct request *rq; | |
748 | int ret; | |
749 | ||
750 | if (!drive->wcache) | |
751 | return 0; | |
752 | ||
753 | rq = blk_get_request(q, WRITE, __GFP_WAIT); | |
754 | ||
755 | idedisk_prepare_flush(q, rq); | |
756 | ||
757 | ret = blk_execute_rq(q, disk, rq); | |
758 | ||
759 | /* | |
760 | * if we failed and caller wants error offset, get it | |
761 | */ | |
762 | if (ret && error_sector) | |
763 | *error_sector = ide_get_error_location(drive, rq->cmd); | |
764 | ||
765 | blk_put_request(rq); | |
766 | return ret; | |
767 | } | |
768 | ||
769 | /* | |
770 | * This is tightly woven into the driver->do_special can not touch. | |
771 | * DON'T do it again until a total personality rewrite is committed. | |
772 | */ | |
773 | static int set_multcount(ide_drive_t *drive, int arg) | |
774 | { | |
775 | struct request rq; | |
776 | ||
777 | if (drive->special.b.set_multmode) | |
778 | return -EBUSY; | |
779 | ide_init_drive_cmd (&rq); | |
780 | rq.flags = REQ_DRIVE_CMD; | |
781 | drive->mult_req = arg; | |
782 | drive->special.b.set_multmode = 1; | |
783 | (void) ide_do_drive_cmd (drive, &rq, ide_wait); | |
784 | return (drive->mult_count == arg) ? 0 : -EIO; | |
785 | } | |
786 | ||
787 | static int set_nowerr(ide_drive_t *drive, int arg) | |
788 | { | |
789 | if (ide_spin_wait_hwgroup(drive)) | |
790 | return -EBUSY; | |
791 | drive->nowerr = arg; | |
792 | drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT; | |
793 | spin_unlock_irq(&ide_lock); | |
794 | return 0; | |
795 | } | |
796 | ||
797 | static int write_cache(ide_drive_t *drive, int arg) | |
798 | { | |
799 | ide_task_t args; | |
800 | int err; | |
801 | ||
802 | if (!ide_id_has_flush_cache(drive->id)) | |
803 | return 1; | |
804 | ||
805 | memset(&args, 0, sizeof(ide_task_t)); | |
806 | args.tfRegister[IDE_FEATURE_OFFSET] = (arg) ? | |
807 | SETFEATURES_EN_WCACHE : SETFEATURES_DIS_WCACHE; | |
808 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SETFEATURES; | |
809 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
810 | args.handler = &task_no_data_intr; | |
811 | ||
812 | err = ide_raw_taskfile(drive, &args, NULL); | |
813 | if (err) | |
814 | return err; | |
815 | ||
816 | drive->wcache = arg; | |
817 | return 0; | |
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; | |
891 | int barrier; | |
892 | ||
893 | idedisk_add_settings(drive); | |
894 | ||
895 | if (drive->id_read == 0) | |
896 | return; | |
897 | ||
898 | /* | |
899 | * CompactFlash cards and their brethern look just like hard drives | |
900 | * to us, but they are removable and don't have a doorlock mechanism. | |
901 | */ | |
902 | if (drive->removable && !(drive->is_flash)) { | |
903 | /* | |
904 | * Removable disks (eg. SYQUEST); ignore 'WD' drives | |
905 | */ | |
906 | if (id->model[0] != 'W' || id->model[1] != 'D') { | |
907 | drive->doorlocking = 1; | |
908 | } | |
909 | } | |
910 | ||
911 | (void)set_lba_addressing(drive, 1); | |
912 | ||
913 | if (drive->addressing == 1) { | |
914 | ide_hwif_t *hwif = HWIF(drive); | |
915 | int max_s = 2048; | |
916 | ||
917 | if (max_s > hwif->rqsize) | |
918 | max_s = hwif->rqsize; | |
919 | ||
920 | blk_queue_max_sectors(drive->queue, max_s); | |
921 | } | |
922 | ||
923 | printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, drive->queue->max_sectors / 2); | |
924 | ||
925 | /* calculate drive capacity, and select LBA if possible */ | |
926 | init_idedisk_capacity (drive); | |
927 | ||
928 | /* limit drive capacity to 137GB if LBA48 cannot be used */ | |
929 | if (drive->addressing == 0 && drive->capacity64 > 1ULL << 28) { | |
930 | printk(KERN_WARNING "%s: cannot use LBA48 - full capacity " | |
931 | "%llu sectors (%llu MB)\n", | |
932 | drive->name, (unsigned long long)drive->capacity64, | |
933 | sectors_to_MB(drive->capacity64)); | |
934 | drive->capacity64 = 1ULL << 28; | |
935 | } | |
936 | ||
937 | if (drive->hwif->no_lba48_dma && drive->addressing) { | |
938 | if (drive->capacity64 > 1ULL << 28) { | |
939 | printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode will" | |
940 | " be used for accessing sectors > %u\n", | |
941 | drive->name, 1 << 28); | |
942 | } else | |
943 | drive->addressing = 0; | |
944 | } | |
945 | ||
946 | /* | |
947 | * if possible, give fdisk access to more of the drive, | |
948 | * by correcting bios_cyls: | |
949 | */ | |
950 | capacity = idedisk_capacity (drive); | |
951 | if (!drive->forced_geom) { | |
952 | ||
953 | if (idedisk_supports_lba48(drive->id)) { | |
954 | /* compatibility */ | |
955 | drive->bios_sect = 63; | |
956 | drive->bios_head = 255; | |
957 | } | |
958 | ||
959 | if (drive->bios_sect && drive->bios_head) { | |
960 | unsigned int cap0 = capacity; /* truncate to 32 bits */ | |
961 | unsigned int cylsz, cyl; | |
962 | ||
963 | if (cap0 != capacity) | |
964 | drive->bios_cyl = 65535; | |
965 | else { | |
966 | cylsz = drive->bios_sect * drive->bios_head; | |
967 | cyl = cap0 / cylsz; | |
968 | if (cyl > 65535) | |
969 | cyl = 65535; | |
970 | if (cyl > drive->bios_cyl) | |
971 | drive->bios_cyl = cyl; | |
972 | } | |
973 | } | |
974 | } | |
975 | printk(KERN_INFO "%s: %llu sectors (%llu MB)", | |
976 | drive->name, capacity, sectors_to_MB(capacity)); | |
977 | ||
978 | /* Only print cache size when it was specified */ | |
979 | if (id->buf_size) | |
980 | printk (" w/%dKiB Cache", id->buf_size/2); | |
981 | ||
982 | printk(", CHS=%d/%d/%d", | |
983 | drive->bios_cyl, drive->bios_head, drive->bios_sect); | |
984 | if (drive->using_dma) | |
985 | ide_dma_verbose(drive); | |
986 | printk("\n"); | |
987 | ||
988 | drive->no_io_32bit = id->dword_io ? 1 : 0; | |
989 | ||
990 | /* write cache enabled? */ | |
991 | if ((id->csfo & 1) || (id->cfs_enable_1 & (1 << 5))) | |
992 | drive->wcache = 1; | |
993 | ||
994 | write_cache(drive, 1); | |
995 | ||
996 | /* | |
997 | * We must avoid issuing commands a drive does not understand | |
998 | * or we may crash it. We check flush cache is supported. We also | |
999 | * check we have the LBA48 flush cache if the drive capacity is | |
1000 | * too large. By this time we have trimmed the drive capacity if | |
1001 | * LBA48 is not available so we don't need to recheck that. | |
1002 | */ | |
1003 | barrier = 0; | |
1004 | if (ide_id_has_flush_cache(id)) | |
1005 | barrier = 1; | |
1006 | if (drive->addressing == 1) { | |
1007 | /* Can't issue the correct flush ? */ | |
1008 | if (capacity > (1ULL << 28) && !ide_id_has_flush_cache_ext(id)) | |
1009 | barrier = 0; | |
1010 | } | |
1011 | ||
1012 | printk(KERN_INFO "%s: cache flushes %ssupported\n", | |
1013 | drive->name, barrier ? "" : "not "); | |
1014 | if (barrier) { | |
1015 | blk_queue_ordered(drive->queue, QUEUE_ORDERED_FLUSH); | |
1016 | drive->queue->prepare_flush_fn = idedisk_prepare_flush; | |
1017 | drive->queue->end_flush_fn = idedisk_end_flush; | |
1018 | blk_queue_issue_flush_fn(drive->queue, idedisk_issue_flush); | |
1019 | } | |
1020 | } | |
1021 | ||
1022 | static void ide_cacheflush_p(ide_drive_t *drive) | |
1023 | { | |
1024 | if (!drive->wcache || !ide_id_has_flush_cache(drive->id)) | |
1025 | return; | |
1026 | ||
1027 | if (do_idedisk_flushcache(drive)) | |
1028 | printk(KERN_INFO "%s: wcache flush failed!\n", drive->name); | |
1029 | } | |
1030 | ||
8604affd | 1031 | static int ide_disk_remove(struct device *dev) |
1da177e4 | 1032 | { |
8604affd | 1033 | ide_drive_t *drive = to_ide_device(dev); |
1da177e4 LT |
1034 | struct ide_disk_obj *idkp = drive->driver_data; |
1035 | struct gendisk *g = idkp->disk; | |
1036 | ||
1037 | ide_cacheflush_p(drive); | |
8604affd BZ |
1038 | |
1039 | ide_unregister_subdriver(drive, idkp->driver); | |
1040 | ||
1da177e4 LT |
1041 | del_gendisk(g); |
1042 | ||
1043 | ide_disk_put(idkp); | |
1044 | ||
1045 | return 0; | |
1046 | } | |
1047 | ||
1048 | static void ide_disk_release(struct kref *kref) | |
1049 | { | |
1050 | struct ide_disk_obj *idkp = to_ide_disk(kref); | |
1051 | ide_drive_t *drive = idkp->drive; | |
1052 | struct gendisk *g = idkp->disk; | |
1053 | ||
1054 | drive->driver_data = NULL; | |
1055 | drive->devfs_name[0] = '\0'; | |
1056 | g->private_data = NULL; | |
1057 | put_disk(g); | |
1058 | kfree(idkp); | |
1059 | } | |
1060 | ||
8604affd | 1061 | static int ide_disk_probe(struct device *dev); |
1da177e4 LT |
1062 | |
1063 | static void ide_device_shutdown(struct device *dev) | |
1064 | { | |
1065 | ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); | |
1066 | ||
1067 | #ifdef CONFIG_ALPHA | |
1068 | /* On Alpha, halt(8) doesn't actually turn the machine off, | |
1069 | it puts you into the sort of firmware monitor. Typically, | |
1070 | it's used to boot another kernel image, so it's not much | |
1071 | different from reboot(8). Therefore, we don't need to | |
1072 | spin down the disk in this case, especially since Alpha | |
1073 | firmware doesn't handle disks in standby mode properly. | |
1074 | On the other hand, it's reasonably safe to turn the power | |
1075 | off when the shutdown process reaches the firmware prompt, | |
1076 | as the firmware initialization takes rather long time - | |
1077 | at least 10 seconds, which should be sufficient for | |
1078 | the disk to expire its write cache. */ | |
1079 | if (system_state != SYSTEM_POWER_OFF) { | |
1080 | #else | |
1081 | if (system_state == SYSTEM_RESTART) { | |
1082 | #endif | |
1083 | ide_cacheflush_p(drive); | |
1084 | return; | |
1085 | } | |
1086 | ||
1087 | printk("Shutdown: %s\n", drive->name); | |
1088 | dev->bus->suspend(dev, PMSG_SUSPEND); | |
1089 | } | |
1090 | ||
1da177e4 LT |
1091 | static ide_driver_t idedisk_driver = { |
1092 | .owner = THIS_MODULE, | |
1093 | .gen_driver = { | |
8604affd BZ |
1094 | .name = "ide-disk", |
1095 | .bus = &ide_bus_type, | |
1096 | .probe = ide_disk_probe, | |
1097 | .remove = ide_disk_remove, | |
1da177e4 LT |
1098 | .shutdown = ide_device_shutdown, |
1099 | }, | |
1da177e4 LT |
1100 | .version = IDEDISK_VERSION, |
1101 | .media = ide_disk, | |
1da177e4 | 1102 | .supports_dsc_overlap = 0, |
1da177e4 LT |
1103 | .do_request = ide_do_rw_disk, |
1104 | .end_request = ide_end_request, | |
1105 | .error = __ide_error, | |
1106 | .abort = __ide_abort, | |
1107 | .proc = idedisk_proc, | |
1da177e4 LT |
1108 | }; |
1109 | ||
1110 | static int idedisk_open(struct inode *inode, struct file *filp) | |
1111 | { | |
1112 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
1113 | struct ide_disk_obj *idkp; | |
1114 | ide_drive_t *drive; | |
1115 | ||
1116 | if (!(idkp = ide_disk_get(disk))) | |
1117 | return -ENXIO; | |
1118 | ||
1119 | drive = idkp->drive; | |
1120 | ||
1121 | drive->usage++; | |
1122 | if (drive->removable && drive->usage == 1) { | |
1123 | ide_task_t args; | |
1124 | memset(&args, 0, sizeof(ide_task_t)); | |
1125 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_DOORLOCK; | |
1126 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
1127 | args.handler = &task_no_data_intr; | |
1128 | check_disk_change(inode->i_bdev); | |
1129 | /* | |
1130 | * Ignore the return code from door_lock, | |
1131 | * since the open() has already succeeded, | |
1132 | * and the door_lock is irrelevant at this point. | |
1133 | */ | |
1134 | if (drive->doorlocking && ide_raw_taskfile(drive, &args, NULL)) | |
1135 | drive->doorlocking = 0; | |
1136 | } | |
1137 | return 0; | |
1138 | } | |
1139 | ||
1140 | static int idedisk_release(struct inode *inode, struct file *filp) | |
1141 | { | |
1142 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
1143 | struct ide_disk_obj *idkp = ide_disk_g(disk); | |
1144 | ide_drive_t *drive = idkp->drive; | |
1145 | ||
1146 | if (drive->usage == 1) | |
1147 | ide_cacheflush_p(drive); | |
1148 | if (drive->removable && drive->usage == 1) { | |
1149 | ide_task_t args; | |
1150 | memset(&args, 0, sizeof(ide_task_t)); | |
1151 | args.tfRegister[IDE_COMMAND_OFFSET] = WIN_DOORUNLOCK; | |
1152 | args.command_type = IDE_DRIVE_TASK_NO_DATA; | |
1153 | args.handler = &task_no_data_intr; | |
1154 | if (drive->doorlocking && ide_raw_taskfile(drive, &args, NULL)) | |
1155 | drive->doorlocking = 0; | |
1156 | } | |
1157 | drive->usage--; | |
1158 | ||
1159 | ide_disk_put(idkp); | |
1160 | ||
1161 | return 0; | |
1162 | } | |
1163 | ||
1164 | static int idedisk_ioctl(struct inode *inode, struct file *file, | |
1165 | unsigned int cmd, unsigned long arg) | |
1166 | { | |
1167 | struct block_device *bdev = inode->i_bdev; | |
1168 | struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk); | |
1169 | return generic_ide_ioctl(idkp->drive, file, bdev, cmd, arg); | |
1170 | } | |
1171 | ||
1172 | static int idedisk_media_changed(struct gendisk *disk) | |
1173 | { | |
1174 | struct ide_disk_obj *idkp = ide_disk_g(disk); | |
1175 | ide_drive_t *drive = idkp->drive; | |
1176 | ||
1177 | /* do not scan partitions twice if this is a removable device */ | |
1178 | if (drive->attach) { | |
1179 | drive->attach = 0; | |
1180 | return 0; | |
1181 | } | |
1182 | /* if removable, always assume it was changed */ | |
1183 | return drive->removable; | |
1184 | } | |
1185 | ||
1186 | static int idedisk_revalidate_disk(struct gendisk *disk) | |
1187 | { | |
1188 | struct ide_disk_obj *idkp = ide_disk_g(disk); | |
1189 | set_capacity(disk, idedisk_capacity(idkp->drive)); | |
1190 | return 0; | |
1191 | } | |
1192 | ||
1193 | static struct block_device_operations idedisk_ops = { | |
1194 | .owner = THIS_MODULE, | |
1195 | .open = idedisk_open, | |
1196 | .release = idedisk_release, | |
1197 | .ioctl = idedisk_ioctl, | |
1198 | .media_changed = idedisk_media_changed, | |
1199 | .revalidate_disk= idedisk_revalidate_disk | |
1200 | }; | |
1201 | ||
1202 | MODULE_DESCRIPTION("ATA DISK Driver"); | |
1203 | ||
8604affd | 1204 | static int ide_disk_probe(struct device *dev) |
1da177e4 | 1205 | { |
8604affd | 1206 | ide_drive_t *drive = to_ide_device(dev); |
1da177e4 LT |
1207 | struct ide_disk_obj *idkp; |
1208 | struct gendisk *g; | |
1209 | ||
1210 | /* strstr("foo", "") is non-NULL */ | |
1211 | if (!strstr("ide-disk", drive->driver_req)) | |
1212 | goto failed; | |
1213 | if (!drive->present) | |
1214 | goto failed; | |
1215 | if (drive->media != ide_disk) | |
1216 | goto failed; | |
1217 | ||
1218 | idkp = kmalloc(sizeof(*idkp), GFP_KERNEL); | |
1219 | if (!idkp) | |
1220 | goto failed; | |
1221 | ||
1946089a CL |
1222 | g = alloc_disk_node(1 << PARTN_BITS, |
1223 | pcibus_to_node(drive->hwif->pci_dev->bus)); | |
1da177e4 LT |
1224 | if (!g) |
1225 | goto out_free_idkp; | |
1226 | ||
1227 | ide_init_disk(g, drive); | |
1228 | ||
8604affd | 1229 | ide_register_subdriver(drive, &idedisk_driver); |
1da177e4 LT |
1230 | |
1231 | memset(idkp, 0, sizeof(*idkp)); | |
1232 | ||
1233 | kref_init(&idkp->kref); | |
1234 | ||
1235 | idkp->drive = drive; | |
1236 | idkp->driver = &idedisk_driver; | |
1237 | idkp->disk = g; | |
1238 | ||
1239 | g->private_data = &idkp->driver; | |
1240 | ||
1241 | drive->driver_data = idkp; | |
1242 | ||
1da177e4 LT |
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; | |
8604affd | 1250 | |
1da177e4 LT |
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 | ||
1da177e4 LT |
1260 | out_free_idkp: |
1261 | kfree(idkp); | |
1262 | failed: | |
8604affd | 1263 | return -ENODEV; |
1da177e4 LT |
1264 | } |
1265 | ||
1266 | static void __exit idedisk_exit (void) | |
1267 | { | |
8604affd | 1268 | driver_unregister(&idedisk_driver.gen_driver); |
1da177e4 LT |
1269 | } |
1270 | ||
1271 | static int idedisk_init (void) | |
1272 | { | |
8604affd | 1273 | return driver_register(&idedisk_driver.gen_driver); |
1da177e4 LT |
1274 | } |
1275 | ||
1276 | module_init(idedisk_init); | |
1277 | module_exit(idedisk_exit); | |
1278 | MODULE_LICENSE("GPL"); |