Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Alan Cox | 6efd936 | 2005-06-27 15:24:22 -0700 | [diff] [blame] | 122 | /* No non-LBA info .. so valid! */ |
| 123 | if (id->cyls == 0) |
| 124 | return 1; |
| 125 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
James Bottomley | 994ca9a | 2005-06-20 14:11:09 +0200 | [diff] [blame] | 757 | ret = blk_execute_rq(q, disk, rq, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 1031 | static int ide_disk_remove(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | { |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 1033 | ide_drive_t *drive = to_ide_device(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | struct ide_disk_obj *idkp = drive->driver_data; |
| 1035 | struct gendisk *g = idkp->disk; |
| 1036 | |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 1037 | ide_unregister_subdriver(drive, idkp->driver); |
| 1038 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | del_gendisk(g); |
| 1040 | |
Bartlomiej Zolnierkiewicz | d36fef6 | 2005-12-15 02:19:20 +0100 | [diff] [blame] | 1041 | ide_cacheflush_p(drive); |
| 1042 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 1061 | static int ide_disk_probe(struct device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | static ide_driver_t idedisk_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | .gen_driver = { |
Laurent Riffard | 4ef3b8f | 2005-11-18 22:15:40 +0100 | [diff] [blame] | 1093 | .owner = THIS_MODULE, |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 1094 | .name = "ide-disk", |
| 1095 | .bus = &ide_bus_type, |
| 1096 | .probe = ide_disk_probe, |
| 1097 | .remove = ide_disk_remove, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | .shutdown = ide_device_shutdown, |
| 1099 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | .version = IDEDISK_VERSION, |
| 1101 | .media = ide_disk, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | .supports_dsc_overlap = 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 1204 | static int ide_disk_probe(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | { |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 1206 | ide_drive_t *drive = to_ide_device(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Deepak Saxena | f5e3c2f | 2005-11-07 01:01:25 -0800 | [diff] [blame] | 1218 | idkp = kzalloc(sizeof(*idkp), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | if (!idkp) |
| 1220 | goto failed; |
| 1221 | |
Christoph Lameter | 1946089 | 2005-06-23 00:08:19 -0700 | [diff] [blame] | 1222 | g = alloc_disk_node(1 << PARTN_BITS, |
Christoph Lameter | 86b3786 | 2005-08-09 19:59:21 -0700 | [diff] [blame] | 1223 | hwif_to_node(drive->hwif)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | if (!g) |
| 1225 | goto out_free_idkp; |
| 1226 | |
| 1227 | ide_init_disk(g, drive); |
| 1228 | |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 1229 | ide_register_subdriver(drive, &idedisk_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | kref_init(&idkp->kref); |
| 1232 | |
| 1233 | idkp->drive = drive; |
| 1234 | idkp->driver = &idedisk_driver; |
| 1235 | idkp->disk = g; |
| 1236 | |
| 1237 | g->private_data = &idkp->driver; |
| 1238 | |
| 1239 | drive->driver_data = idkp; |
| 1240 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | idedisk_setup(drive); |
| 1242 | if ((!drive->head || drive->head > 16) && !drive->select.b.lba) { |
| 1243 | printk(KERN_ERR "%s: INVALID GEOMETRY: %d PHYSICAL HEADS?\n", |
| 1244 | drive->name, drive->head); |
| 1245 | drive->attach = 0; |
| 1246 | } else |
| 1247 | drive->attach = 1; |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 1248 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | g->minors = 1 << PARTN_BITS; |
| 1250 | strcpy(g->devfs_name, drive->devfs_name); |
| 1251 | g->driverfs_dev = &drive->gendev; |
| 1252 | g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; |
| 1253 | set_capacity(g, idedisk_capacity(drive)); |
| 1254 | g->fops = &idedisk_ops; |
| 1255 | add_disk(g); |
| 1256 | return 0; |
| 1257 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | out_free_idkp: |
| 1259 | kfree(idkp); |
| 1260 | failed: |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 1261 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | } |
| 1263 | |
| 1264 | static void __exit idedisk_exit (void) |
| 1265 | { |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 1266 | driver_unregister(&idedisk_driver.gen_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | } |
| 1268 | |
Bartlomiej Zolnierkiewicz | 17514e8 | 2005-11-19 22:24:35 +0100 | [diff] [blame] | 1269 | static int __init idedisk_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | { |
Bartlomiej Zolnierkiewicz | 8604aff | 2005-05-26 14:55:34 +0200 | [diff] [blame] | 1271 | return driver_register(&idedisk_driver.gen_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | } |
| 1273 | |
Kay Sievers | 263756e | 2005-12-12 18:03:44 +0100 | [diff] [blame] | 1274 | MODULE_ALIAS("ide:*m-disk*"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | module_init(idedisk_init); |
| 1276 | module_exit(idedisk_exit); |
| 1277 | MODULE_LICENSE("GPL"); |