ide-disk.c revision 7062cdc5edb3ba4b2eb906684cd19e103de1f920
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 standby, do flush on ATA < ATA6 41 * fix wcache setup. 42 */ 43 44#define IDEDISK_VERSION "1.18" 45 46//#define DEBUG 47 48#include <linux/module.h> 49#include <linux/types.h> 50#include <linux/string.h> 51#include <linux/kernel.h> 52#include <linux/timer.h> 53#include <linux/mm.h> 54#include <linux/interrupt.h> 55#include <linux/major.h> 56#include <linux/errno.h> 57#include <linux/genhd.h> 58#include <linux/slab.h> 59#include <linux/delay.h> 60#include <linux/mutex.h> 61#include <linux/leds.h> 62 63#define _IDE_DISK 64 65#include <linux/ide.h> 66 67#include <asm/byteorder.h> 68#include <asm/irq.h> 69#include <asm/uaccess.h> 70#include <asm/io.h> 71#include <asm/div64.h> 72 73struct ide_disk_obj { 74 ide_drive_t *drive; 75 ide_driver_t *driver; 76 struct gendisk *disk; 77 struct kref kref; 78 unsigned int openers; /* protected by BKL for now */ 79}; 80 81static DEFINE_MUTEX(idedisk_ref_mutex); 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 88static struct ide_disk_obj *ide_disk_get(struct gendisk *disk) 89{ 90 struct ide_disk_obj *idkp = NULL; 91 92 mutex_lock(&idedisk_ref_mutex); 93 idkp = ide_disk_g(disk); 94 if (idkp) 95 kref_get(&idkp->kref); 96 mutex_unlock(&idedisk_ref_mutex); 97 return idkp; 98} 99 100static void ide_disk_release(struct kref *); 101 102static void ide_disk_put(struct ide_disk_obj *idkp) 103{ 104 mutex_lock(&idedisk_ref_mutex); 105 kref_put(&idkp->kref, ide_disk_release); 106 mutex_unlock(&idedisk_ref_mutex); 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 */ 118static int lba_capacity_is_ok (struct hd_driveid *id) 119{ 120 unsigned long lba_sects, chs_sects, head, tail; 121 122 /* No non-LBA info .. so valid! */ 123 if (id->cyls == 0) 124 return 1; 125 126 /* 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 */ 162static 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, 194 (unsigned long long)block); 195 196 tasklets[0] = 0; 197 tasklets[1] = 0; 198 tasklets[2] = nsectors.b.low; 199 tasklets[3] = nsectors.b.high; 200 tasklets[4] = (task_ioreg_t) block; 201 tasklets[5] = (task_ioreg_t) (block>>8); 202 tasklets[6] = (task_ioreg_t) (block>>16); 203 tasklets[7] = (task_ioreg_t) (block>>24); 204 if (sizeof(block) == 4) { 205 tasklets[8] = (task_ioreg_t) 0; 206 tasklets[9] = (task_ioreg_t) 0; 207 } else { 208 tasklets[8] = (task_ioreg_t)((u64)block >> 32); 209 tasklets[9] = (task_ioreg_t)((u64)block >> 40); 210 } 211#ifdef DEBUG 212 printk("%s: 0x%02x%02x 0x%02x%02x%02x%02x%02x%02x\n", 213 drive->name, tasklets[3], tasklets[2], 214 tasklets[9], tasklets[8], tasklets[7], 215 tasklets[6], tasklets[5], tasklets[4]); 216#endif 217 hwif->OUTB(tasklets[1], IDE_FEATURE_REG); 218 hwif->OUTB(tasklets[3], IDE_NSECTOR_REG); 219 hwif->OUTB(tasklets[7], IDE_SECTOR_REG); 220 hwif->OUTB(tasklets[8], IDE_LCYL_REG); 221 hwif->OUTB(tasklets[9], IDE_HCYL_REG); 222 223 hwif->OUTB(tasklets[0], IDE_FEATURE_REG); 224 hwif->OUTB(tasklets[2], IDE_NSECTOR_REG); 225 hwif->OUTB(tasklets[4], IDE_SECTOR_REG); 226 hwif->OUTB(tasklets[5], IDE_LCYL_REG); 227 hwif->OUTB(tasklets[6], IDE_HCYL_REG); 228 hwif->OUTB(0x00|drive->select.all,IDE_SELECT_REG); 229 } else { 230 hwif->OUTB(0x00, IDE_FEATURE_REG); 231 hwif->OUTB(nsectors.b.low, IDE_NSECTOR_REG); 232 hwif->OUTB(block, IDE_SECTOR_REG); 233 hwif->OUTB(block>>=8, IDE_LCYL_REG); 234 hwif->OUTB(block>>=8, IDE_HCYL_REG); 235 hwif->OUTB(((block>>8)&0x0f)|drive->select.all,IDE_SELECT_REG); 236 } 237 } else { 238 unsigned int sect,head,cyl,track; 239 track = (int)block / drive->sect; 240 sect = (int)block % drive->sect + 1; 241 hwif->OUTB(sect, IDE_SECTOR_REG); 242 head = track % drive->head; 243 cyl = track / drive->head; 244 245 pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect); 246 247 hwif->OUTB(0x00, IDE_FEATURE_REG); 248 hwif->OUTB(nsectors.b.low, IDE_NSECTOR_REG); 249 hwif->OUTB(cyl, IDE_LCYL_REG); 250 hwif->OUTB(cyl>>8, IDE_HCYL_REG); 251 hwif->OUTB(head|drive->select.all,IDE_SELECT_REG); 252 } 253 254 if (dma) { 255 if (!hwif->dma_setup(drive)) { 256 if (rq_data_dir(rq)) { 257 command = lba48 ? WIN_WRITEDMA_EXT : WIN_WRITEDMA; 258 if (drive->vdma) 259 command = lba48 ? WIN_WRITE_EXT: WIN_WRITE; 260 } else { 261 command = lba48 ? WIN_READDMA_EXT : WIN_READDMA; 262 if (drive->vdma) 263 command = lba48 ? WIN_READ_EXT: WIN_READ; 264 } 265 hwif->dma_exec_cmd(drive, command); 266 hwif->dma_start(drive); 267 return ide_started; 268 } 269 /* fallback to PIO */ 270 ide_init_sg_cmd(drive, rq); 271 } 272 273 if (rq_data_dir(rq) == READ) { 274 275 if (drive->mult_count) { 276 hwif->data_phase = TASKFILE_MULTI_IN; 277 command = lba48 ? WIN_MULTREAD_EXT : WIN_MULTREAD; 278 } else { 279 hwif->data_phase = TASKFILE_IN; 280 command = lba48 ? WIN_READ_EXT : WIN_READ; 281 } 282 283 ide_execute_command(drive, command, &task_in_intr, WAIT_CMD, NULL); 284 return ide_started; 285 } else { 286 if (drive->mult_count) { 287 hwif->data_phase = TASKFILE_MULTI_OUT; 288 command = lba48 ? WIN_MULTWRITE_EXT : WIN_MULTWRITE; 289 } else { 290 hwif->data_phase = TASKFILE_OUT; 291 command = lba48 ? WIN_WRITE_EXT : WIN_WRITE; 292 } 293 294 /* FIXME: ->OUTBSYNC ? */ 295 hwif->OUTB(command, IDE_COMMAND_REG); 296 297 return pre_task_out_intr(drive, rq); 298 } 299} 300 301/* 302 * 268435455 == 137439 MB or 28bit limit 303 * 320173056 == 163929 MB or 48bit addressing 304 * 1073741822 == 549756 MB or 48bit addressing fake drive 305 */ 306 307static ide_startstop_t ide_do_rw_disk (ide_drive_t *drive, struct request *rq, sector_t block) 308{ 309 ide_hwif_t *hwif = HWIF(drive); 310 311 BUG_ON(drive->blocked); 312 313 if (!blk_fs_request(rq)) { 314 blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command"); 315 ide_end_request(drive, 0, 0); 316 return ide_stopped; 317 } 318 319 ledtrig_ide_activity(); 320 321 pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n", 322 drive->name, rq_data_dir(rq) == READ ? "read" : "writ", 323 (unsigned long long)block, rq->nr_sectors, 324 (unsigned long)rq->buffer); 325 326 if (hwif->rw_disk) 327 hwif->rw_disk(drive, rq); 328 329 return __ide_do_rw_disk(drive, rq, block); 330} 331 332/* 333 * Queries for true maximum capacity of the drive. 334 * Returns maximum LBA address (> 0) of the drive, 0 if failed. 335 */ 336static unsigned long idedisk_read_native_max_address(ide_drive_t *drive) 337{ 338 ide_task_t args; 339 unsigned long addr = 0; 340 341 /* Create IDE/ATA command request structure */ 342 memset(&args, 0, sizeof(ide_task_t)); 343 args.tfRegister[IDE_SELECT_OFFSET] = 0x40; 344 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_READ_NATIVE_MAX; 345 args.command_type = IDE_DRIVE_TASK_NO_DATA; 346 args.handler = &task_no_data_intr; 347 /* submit command request */ 348 ide_raw_taskfile(drive, &args, NULL); 349 350 /* if OK, compute maximum address value */ 351 if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) { 352 addr = ((args.tfRegister[IDE_SELECT_OFFSET] & 0x0f) << 24) 353 | ((args.tfRegister[ IDE_HCYL_OFFSET] ) << 16) 354 | ((args.tfRegister[ IDE_LCYL_OFFSET] ) << 8) 355 | ((args.tfRegister[IDE_SECTOR_OFFSET] )); 356 addr++; /* since the return value is (maxlba - 1), we add 1 */ 357 } 358 return addr; 359} 360 361static unsigned long long idedisk_read_native_max_address_ext(ide_drive_t *drive) 362{ 363 ide_task_t args; 364 unsigned long long addr = 0; 365 366 /* Create IDE/ATA command request structure */ 367 memset(&args, 0, sizeof(ide_task_t)); 368 369 args.tfRegister[IDE_SELECT_OFFSET] = 0x40; 370 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_READ_NATIVE_MAX_EXT; 371 args.command_type = IDE_DRIVE_TASK_NO_DATA; 372 args.handler = &task_no_data_intr; 373 /* submit command request */ 374 ide_raw_taskfile(drive, &args, NULL); 375 376 /* if OK, compute maximum address value */ 377 if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) { 378 u32 high = (args.hobRegister[IDE_HCYL_OFFSET] << 16) | 379 (args.hobRegister[IDE_LCYL_OFFSET] << 8) | 380 args.hobRegister[IDE_SECTOR_OFFSET]; 381 u32 low = ((args.tfRegister[IDE_HCYL_OFFSET])<<16) | 382 ((args.tfRegister[IDE_LCYL_OFFSET])<<8) | 383 (args.tfRegister[IDE_SECTOR_OFFSET]); 384 addr = ((__u64)high << 24) | low; 385 addr++; /* since the return value is (maxlba - 1), we add 1 */ 386 } 387 return addr; 388} 389 390/* 391 * Sets maximum virtual LBA address of the drive. 392 * Returns new maximum virtual LBA address (> 0) or 0 on failure. 393 */ 394static unsigned long idedisk_set_max_address(ide_drive_t *drive, unsigned long addr_req) 395{ 396 ide_task_t args; 397 unsigned long addr_set = 0; 398 399 addr_req--; 400 /* Create IDE/ATA command request structure */ 401 memset(&args, 0, sizeof(ide_task_t)); 402 args.tfRegister[IDE_SECTOR_OFFSET] = ((addr_req >> 0) & 0xff); 403 args.tfRegister[IDE_LCYL_OFFSET] = ((addr_req >> 8) & 0xff); 404 args.tfRegister[IDE_HCYL_OFFSET] = ((addr_req >> 16) & 0xff); 405 args.tfRegister[IDE_SELECT_OFFSET] = ((addr_req >> 24) & 0x0f) | 0x40; 406 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SET_MAX; 407 args.command_type = IDE_DRIVE_TASK_NO_DATA; 408 args.handler = &task_no_data_intr; 409 /* submit command request */ 410 ide_raw_taskfile(drive, &args, NULL); 411 /* if OK, read new maximum address value */ 412 if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) { 413 addr_set = ((args.tfRegister[IDE_SELECT_OFFSET] & 0x0f) << 24) 414 | ((args.tfRegister[ IDE_HCYL_OFFSET] ) << 16) 415 | ((args.tfRegister[ IDE_LCYL_OFFSET] ) << 8) 416 | ((args.tfRegister[IDE_SECTOR_OFFSET] )); 417 addr_set++; 418 } 419 return addr_set; 420} 421 422static unsigned long long idedisk_set_max_address_ext(ide_drive_t *drive, unsigned long long addr_req) 423{ 424 ide_task_t args; 425 unsigned long long addr_set = 0; 426 427 addr_req--; 428 /* Create IDE/ATA command request structure */ 429 memset(&args, 0, sizeof(ide_task_t)); 430 args.tfRegister[IDE_SECTOR_OFFSET] = ((addr_req >> 0) & 0xff); 431 args.tfRegister[IDE_LCYL_OFFSET] = ((addr_req >>= 8) & 0xff); 432 args.tfRegister[IDE_HCYL_OFFSET] = ((addr_req >>= 8) & 0xff); 433 args.tfRegister[IDE_SELECT_OFFSET] = 0x40; 434 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SET_MAX_EXT; 435 args.hobRegister[IDE_SECTOR_OFFSET] = (addr_req >>= 8) & 0xff; 436 args.hobRegister[IDE_LCYL_OFFSET] = (addr_req >>= 8) & 0xff; 437 args.hobRegister[IDE_HCYL_OFFSET] = (addr_req >>= 8) & 0xff; 438 args.hobRegister[IDE_SELECT_OFFSET] = 0x40; 439 args.hobRegister[IDE_CONTROL_OFFSET_HOB]= (drive->ctl|0x80); 440 args.command_type = IDE_DRIVE_TASK_NO_DATA; 441 args.handler = &task_no_data_intr; 442 /* submit command request */ 443 ide_raw_taskfile(drive, &args, NULL); 444 /* if OK, compute maximum address value */ 445 if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) { 446 u32 high = (args.hobRegister[IDE_HCYL_OFFSET] << 16) | 447 (args.hobRegister[IDE_LCYL_OFFSET] << 8) | 448 args.hobRegister[IDE_SECTOR_OFFSET]; 449 u32 low = ((args.tfRegister[IDE_HCYL_OFFSET])<<16) | 450 ((args.tfRegister[IDE_LCYL_OFFSET])<<8) | 451 (args.tfRegister[IDE_SECTOR_OFFSET]); 452 addr_set = ((__u64)high << 24) | low; 453 addr_set++; 454 } 455 return addr_set; 456} 457 458static unsigned long long sectors_to_MB(unsigned long long n) 459{ 460 n <<= 9; /* make it bytes */ 461 do_div(n, 1000000); /* make it MB */ 462 return n; 463} 464 465/* 466 * Bits 10 of command_set_1 and cfs_enable_1 must be equal, 467 * so on non-buggy drives we need test only one. 468 * However, we should also check whether these fields are valid. 469 */ 470static inline int idedisk_supports_hpa(const struct hd_driveid *id) 471{ 472 return (id->command_set_1 & 0x0400) && (id->cfs_enable_1 & 0x0400); 473} 474 475/* 476 * The same here. 477 */ 478static inline int idedisk_supports_lba48(const struct hd_driveid *id) 479{ 480 return (id->command_set_2 & 0x0400) && (id->cfs_enable_2 & 0x0400) 481 && id->lba_capacity_2; 482} 483 484/* 485 * Some disks report total number of sectors instead of 486 * maximum sector address. We list them here. 487 */ 488static const struct drive_list_entry hpa_list[] = { 489 { "ST340823A", NULL }, 490 { "ST320413A", NULL }, 491 { NULL, NULL } 492}; 493 494static void idedisk_check_hpa(ide_drive_t *drive) 495{ 496 unsigned long long capacity, set_max; 497 int lba48 = idedisk_supports_lba48(drive->id); 498 499 capacity = drive->capacity64; 500 if (lba48) 501 set_max = idedisk_read_native_max_address_ext(drive); 502 else 503 set_max = idedisk_read_native_max_address(drive); 504 505 if (ide_in_drive_list(drive->id, hpa_list)) { 506 /* 507 * Since we are inclusive wrt to firmware revisions do this 508 * extra check and apply the workaround only when needed. 509 */ 510 if (set_max == capacity + 1) 511 set_max--; 512 } 513 514 if (set_max <= capacity) 515 return; 516 517 printk(KERN_INFO "%s: Host Protected Area detected.\n" 518 "\tcurrent capacity is %llu sectors (%llu MB)\n" 519 "\tnative capacity is %llu sectors (%llu MB)\n", 520 drive->name, 521 capacity, sectors_to_MB(capacity), 522 set_max, sectors_to_MB(set_max)); 523 524 if (lba48) 525 set_max = idedisk_set_max_address_ext(drive, set_max); 526 else 527 set_max = idedisk_set_max_address(drive, set_max); 528 if (set_max) { 529 drive->capacity64 = set_max; 530 printk(KERN_INFO "%s: Host Protected Area disabled.\n", 531 drive->name); 532 } 533} 534 535/* 536 * Compute drive->capacity, the full capacity of the drive 537 * Called with drive->id != NULL. 538 * 539 * To compute capacity, this uses either of 540 * 541 * 1. CHS value set by user (whatever user sets will be trusted) 542 * 2. LBA value from target drive (require new ATA feature) 543 * 3. LBA value from system BIOS (new one is OK, old one may break) 544 * 4. CHS value from system BIOS (traditional style) 545 * 546 * in above order (i.e., if value of higher priority is available, 547 * reset will be ignored). 548 */ 549static void init_idedisk_capacity (ide_drive_t *drive) 550{ 551 struct hd_driveid *id = drive->id; 552 /* 553 * If this drive supports the Host Protected Area feature set, 554 * then we may need to change our opinion about the drive's capacity. 555 */ 556 int hpa = idedisk_supports_hpa(id); 557 558 if (idedisk_supports_lba48(id)) { 559 /* drive speaks 48-bit LBA */ 560 drive->select.b.lba = 1; 561 drive->capacity64 = id->lba_capacity_2; 562 if (hpa) 563 idedisk_check_hpa(drive); 564 } else if ((id->capability & 2) && lba_capacity_is_ok(id)) { 565 /* drive speaks 28-bit LBA */ 566 drive->select.b.lba = 1; 567 drive->capacity64 = id->lba_capacity; 568 if (hpa) 569 idedisk_check_hpa(drive); 570 } else { 571 /* drive speaks boring old 28-bit CHS */ 572 drive->capacity64 = drive->cyl * drive->head * drive->sect; 573 } 574} 575 576static sector_t idedisk_capacity (ide_drive_t *drive) 577{ 578 return drive->capacity64 - drive->sect0; 579} 580 581#ifdef CONFIG_IDE_PROC_FS 582static int smart_enable(ide_drive_t *drive) 583{ 584 ide_task_t args; 585 586 memset(&args, 0, sizeof(ide_task_t)); 587 args.tfRegister[IDE_FEATURE_OFFSET] = SMART_ENABLE; 588 args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS; 589 args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS; 590 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART; 591 args.command_type = IDE_DRIVE_TASK_NO_DATA; 592 args.handler = &task_no_data_intr; 593 return ide_raw_taskfile(drive, &args, NULL); 594} 595 596static int get_smart_values(ide_drive_t *drive, u8 *buf) 597{ 598 ide_task_t args; 599 600 memset(&args, 0, sizeof(ide_task_t)); 601 args.tfRegister[IDE_FEATURE_OFFSET] = SMART_READ_VALUES; 602 args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01; 603 args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS; 604 args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS; 605 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART; 606 args.command_type = IDE_DRIVE_TASK_IN; 607 args.data_phase = TASKFILE_IN; 608 args.handler = &task_in_intr; 609 (void) smart_enable(drive); 610 return ide_raw_taskfile(drive, &args, buf); 611} 612 613static int get_smart_thresholds(ide_drive_t *drive, u8 *buf) 614{ 615 ide_task_t args; 616 memset(&args, 0, sizeof(ide_task_t)); 617 args.tfRegister[IDE_FEATURE_OFFSET] = SMART_READ_THRESHOLDS; 618 args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01; 619 args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS; 620 args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS; 621 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART; 622 args.command_type = IDE_DRIVE_TASK_IN; 623 args.data_phase = TASKFILE_IN; 624 args.handler = &task_in_intr; 625 (void) smart_enable(drive); 626 return ide_raw_taskfile(drive, &args, buf); 627} 628 629static int proc_idedisk_read_cache 630 (char *page, char **start, off_t off, int count, int *eof, void *data) 631{ 632 ide_drive_t *drive = (ide_drive_t *) data; 633 char *out = page; 634 int len; 635 636 if (drive->id_read) 637 len = sprintf(out,"%i\n", drive->id->buf_size / 2); 638 else 639 len = sprintf(out,"(none)\n"); 640 PROC_IDE_READ_RETURN(page,start,off,count,eof,len); 641} 642 643static int proc_idedisk_read_capacity 644 (char *page, char **start, off_t off, int count, int *eof, void *data) 645{ 646 ide_drive_t*drive = (ide_drive_t *)data; 647 int len; 648 649 len = sprintf(page,"%llu\n", (long long)idedisk_capacity(drive)); 650 PROC_IDE_READ_RETURN(page,start,off,count,eof,len); 651} 652 653static int proc_idedisk_read_smart_thresholds 654 (char *page, char **start, off_t off, int count, int *eof, void *data) 655{ 656 ide_drive_t *drive = (ide_drive_t *)data; 657 int len = 0, i = 0; 658 659 if (!get_smart_thresholds(drive, page)) { 660 unsigned short *val = (unsigned short *) page; 661 char *out = ((char *)val) + (SECTOR_WORDS * 4); 662 page = out; 663 do { 664 out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n'); 665 val += 1; 666 } while (i < (SECTOR_WORDS * 2)); 667 len = out - page; 668 } 669 PROC_IDE_READ_RETURN(page,start,off,count,eof,len); 670} 671 672static int proc_idedisk_read_smart_values 673 (char *page, char **start, off_t off, int count, int *eof, void *data) 674{ 675 ide_drive_t *drive = (ide_drive_t *)data; 676 int len = 0, i = 0; 677 678 if (!get_smart_values(drive, page)) { 679 unsigned short *val = (unsigned short *) page; 680 char *out = ((char *)val) + (SECTOR_WORDS * 4); 681 page = out; 682 do { 683 out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n'); 684 val += 1; 685 } while (i < (SECTOR_WORDS * 2)); 686 len = out - page; 687 } 688 PROC_IDE_READ_RETURN(page,start,off,count,eof,len); 689} 690 691static ide_proc_entry_t idedisk_proc[] = { 692 { "cache", S_IFREG|S_IRUGO, proc_idedisk_read_cache, NULL }, 693 { "capacity", S_IFREG|S_IRUGO, proc_idedisk_read_capacity, NULL }, 694 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, 695 { "smart_values", S_IFREG|S_IRUSR, proc_idedisk_read_smart_values, NULL }, 696 { "smart_thresholds", S_IFREG|S_IRUSR, proc_idedisk_read_smart_thresholds, NULL }, 697 { NULL, 0, NULL, NULL } 698}; 699#endif /* CONFIG_IDE_PROC_FS */ 700 701static void idedisk_prepare_flush(struct request_queue *q, struct request *rq) 702{ 703 ide_drive_t *drive = q->queuedata; 704 705 memset(rq->cmd, 0, sizeof(rq->cmd)); 706 707 if (ide_id_has_flush_cache_ext(drive->id) && 708 (drive->capacity64 >= (1UL << 28))) 709 rq->cmd[0] = WIN_FLUSH_CACHE_EXT; 710 else 711 rq->cmd[0] = WIN_FLUSH_CACHE; 712 713 714 rq->cmd_type = REQ_TYPE_ATA_TASK; 715 rq->cmd_flags |= REQ_SOFTBARRIER; 716 rq->buffer = rq->cmd; 717} 718 719static int idedisk_issue_flush(struct request_queue *q, struct gendisk *disk, 720 sector_t *error_sector) 721{ 722 ide_drive_t *drive = q->queuedata; 723 struct request *rq; 724 int ret; 725 726 if (!drive->wcache) 727 return 0; 728 729 rq = blk_get_request(q, WRITE, __GFP_WAIT); 730 731 idedisk_prepare_flush(q, rq); 732 733 ret = blk_execute_rq(q, disk, rq, 0); 734 735 /* 736 * if we failed and caller wants error offset, get it 737 */ 738 if (ret && error_sector) 739 *error_sector = ide_get_error_location(drive, rq->cmd); 740 741 blk_put_request(rq); 742 return ret; 743} 744 745/* 746 * This is tightly woven into the driver->do_special can not touch. 747 * DON'T do it again until a total personality rewrite is committed. 748 */ 749static int set_multcount(ide_drive_t *drive, int arg) 750{ 751 struct request rq; 752 753 if (arg < 0 || arg > drive->id->max_multsect) 754 return -EINVAL; 755 756 if (drive->special.b.set_multmode) 757 return -EBUSY; 758 ide_init_drive_cmd (&rq); 759 rq.cmd_type = REQ_TYPE_ATA_CMD; 760 drive->mult_req = arg; 761 drive->special.b.set_multmode = 1; 762 (void) ide_do_drive_cmd (drive, &rq, ide_wait); 763 return (drive->mult_count == arg) ? 0 : -EIO; 764} 765 766static int set_nowerr(ide_drive_t *drive, int arg) 767{ 768 if (arg < 0 || arg > 1) 769 return -EINVAL; 770 771 if (ide_spin_wait_hwgroup(drive)) 772 return -EBUSY; 773 drive->nowerr = arg; 774 drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT; 775 spin_unlock_irq(&ide_lock); 776 return 0; 777} 778 779static void update_ordered(ide_drive_t *drive) 780{ 781 struct hd_driveid *id = drive->id; 782 unsigned ordered = QUEUE_ORDERED_NONE; 783 prepare_flush_fn *prep_fn = NULL; 784 issue_flush_fn *issue_fn = NULL; 785 786 if (drive->wcache) { 787 unsigned long long capacity; 788 int barrier; 789 /* 790 * We must avoid issuing commands a drive does not 791 * understand or we may crash it. We check flush cache 792 * is supported. We also check we have the LBA48 flush 793 * cache if the drive capacity is too large. By this 794 * time we have trimmed the drive capacity if LBA48 is 795 * not available so we don't need to recheck that. 796 */ 797 capacity = idedisk_capacity(drive); 798 barrier = ide_id_has_flush_cache(id) && !drive->noflush && 799 (drive->addressing == 0 || capacity <= (1ULL << 28) || 800 ide_id_has_flush_cache_ext(id)); 801 802 printk(KERN_INFO "%s: cache flushes %ssupported\n", 803 drive->name, barrier ? "" : "not "); 804 805 if (barrier) { 806 ordered = QUEUE_ORDERED_DRAIN_FLUSH; 807 prep_fn = idedisk_prepare_flush; 808 issue_fn = idedisk_issue_flush; 809 } 810 } else 811 ordered = QUEUE_ORDERED_DRAIN; 812 813 blk_queue_ordered(drive->queue, ordered, prep_fn); 814 blk_queue_issue_flush_fn(drive->queue, issue_fn); 815} 816 817static int write_cache(ide_drive_t *drive, int arg) 818{ 819 ide_task_t args; 820 int err = 1; 821 822 if (arg < 0 || arg > 1) 823 return -EINVAL; 824 825 if (ide_id_has_flush_cache(drive->id)) { 826 memset(&args, 0, sizeof(ide_task_t)); 827 args.tfRegister[IDE_FEATURE_OFFSET] = (arg) ? 828 SETFEATURES_EN_WCACHE : SETFEATURES_DIS_WCACHE; 829 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SETFEATURES; 830 args.command_type = IDE_DRIVE_TASK_NO_DATA; 831 args.handler = &task_no_data_intr; 832 err = ide_raw_taskfile(drive, &args, NULL); 833 if (err == 0) 834 drive->wcache = arg; 835 } 836 837 update_ordered(drive); 838 839 return err; 840} 841 842static int do_idedisk_flushcache (ide_drive_t *drive) 843{ 844 ide_task_t args; 845 846 memset(&args, 0, sizeof(ide_task_t)); 847 if (ide_id_has_flush_cache_ext(drive->id)) 848 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_FLUSH_CACHE_EXT; 849 else 850 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_FLUSH_CACHE; 851 args.command_type = IDE_DRIVE_TASK_NO_DATA; 852 args.handler = &task_no_data_intr; 853 return ide_raw_taskfile(drive, &args, NULL); 854} 855 856static int set_acoustic (ide_drive_t *drive, int arg) 857{ 858 ide_task_t args; 859 860 if (arg < 0 || arg > 254) 861 return -EINVAL; 862 863 memset(&args, 0, sizeof(ide_task_t)); 864 args.tfRegister[IDE_FEATURE_OFFSET] = (arg) ? SETFEATURES_EN_AAM : 865 SETFEATURES_DIS_AAM; 866 args.tfRegister[IDE_NSECTOR_OFFSET] = arg; 867 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SETFEATURES; 868 args.command_type = IDE_DRIVE_TASK_NO_DATA; 869 args.handler = &task_no_data_intr; 870 ide_raw_taskfile(drive, &args, NULL); 871 drive->acoustic = arg; 872 return 0; 873} 874 875/* 876 * drive->addressing: 877 * 0: 28-bit 878 * 1: 48-bit 879 * 2: 48-bit capable doing 28-bit 880 */ 881static int set_lba_addressing(ide_drive_t *drive, int arg) 882{ 883 if (arg < 0 || arg > 2) 884 return -EINVAL; 885 886 drive->addressing = 0; 887 888 if (HWIF(drive)->no_lba48) 889 return 0; 890 891 if (!idedisk_supports_lba48(drive->id)) 892 return -EIO; 893 drive->addressing = arg; 894 return 0; 895} 896 897#ifdef CONFIG_IDE_PROC_FS 898static void idedisk_add_settings(ide_drive_t *drive) 899{ 900 struct hd_driveid *id = drive->id; 901 902 ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 65535, 1, 1, &drive->bios_cyl, NULL); 903 ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); 904 ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); 905 ide_add_setting(drive, "address", SETTING_RW, TYPE_BYTE, 0, 2, 1, 1, &drive->addressing, set_lba_addressing); 906 ide_add_setting(drive, "bswap", SETTING_READ, TYPE_BYTE, 0, 1, 1, 1, &drive->bswap, NULL); 907 ide_add_setting(drive, "multcount", SETTING_RW, TYPE_BYTE, 0, id->max_multsect, 1, 1, &drive->mult_count, set_multcount); 908 ide_add_setting(drive, "nowerr", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->nowerr, set_nowerr); 909 ide_add_setting(drive, "lun", SETTING_RW, TYPE_INT, 0, 7, 1, 1, &drive->lun, NULL); 910 ide_add_setting(drive, "wcache", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->wcache, write_cache); 911 ide_add_setting(drive, "acoustic", SETTING_RW, TYPE_BYTE, 0, 254, 1, 1, &drive->acoustic, set_acoustic); 912 ide_add_setting(drive, "failures", SETTING_RW, TYPE_INT, 0, 65535, 1, 1, &drive->failures, NULL); 913 ide_add_setting(drive, "max_failures", SETTING_RW, TYPE_INT, 0, 65535, 1, 1, &drive->max_failures, NULL); 914} 915#else 916static inline void idedisk_add_settings(ide_drive_t *drive) { ; } 917#endif 918 919static void idedisk_setup (ide_drive_t *drive) 920{ 921 struct hd_driveid *id = drive->id; 922 unsigned long long capacity; 923 924 idedisk_add_settings(drive); 925 926 if (drive->id_read == 0) 927 return; 928 929 if (drive->removable) { 930 /* 931 * Removable disks (eg. SYQUEST); ignore 'WD' drives 932 */ 933 if (id->model[0] != 'W' || id->model[1] != 'D') { 934 drive->doorlocking = 1; 935 } 936 } 937 938 (void)set_lba_addressing(drive, 1); 939 940 if (drive->addressing == 1) { 941 ide_hwif_t *hwif = HWIF(drive); 942 int max_s = 2048; 943 944 if (max_s > hwif->rqsize) 945 max_s = hwif->rqsize; 946 947 blk_queue_max_sectors(drive->queue, max_s); 948 } 949 950 printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, drive->queue->max_sectors / 2); 951 952 /* calculate drive capacity, and select LBA if possible */ 953 init_idedisk_capacity (drive); 954 955 /* limit drive capacity to 137GB if LBA48 cannot be used */ 956 if (drive->addressing == 0 && drive->capacity64 > 1ULL << 28) { 957 printk(KERN_WARNING "%s: cannot use LBA48 - full capacity " 958 "%llu sectors (%llu MB)\n", 959 drive->name, (unsigned long long)drive->capacity64, 960 sectors_to_MB(drive->capacity64)); 961 drive->capacity64 = 1ULL << 28; 962 } 963 964 if (drive->hwif->no_lba48_dma && drive->addressing) { 965 if (drive->capacity64 > 1ULL << 28) { 966 printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode will" 967 " be used for accessing sectors > %u\n", 968 drive->name, 1 << 28); 969 } else 970 drive->addressing = 0; 971 } 972 973 /* 974 * if possible, give fdisk access to more of the drive, 975 * by correcting bios_cyls: 976 */ 977 capacity = idedisk_capacity (drive); 978 if (!drive->forced_geom) { 979 980 if (idedisk_supports_lba48(drive->id)) { 981 /* compatibility */ 982 drive->bios_sect = 63; 983 drive->bios_head = 255; 984 } 985 986 if (drive->bios_sect && drive->bios_head) { 987 unsigned int cap0 = capacity; /* truncate to 32 bits */ 988 unsigned int cylsz, cyl; 989 990 if (cap0 != capacity) 991 drive->bios_cyl = 65535; 992 else { 993 cylsz = drive->bios_sect * drive->bios_head; 994 cyl = cap0 / cylsz; 995 if (cyl > 65535) 996 cyl = 65535; 997 if (cyl > drive->bios_cyl) 998 drive->bios_cyl = cyl; 999 } 1000 } 1001 } 1002 printk(KERN_INFO "%s: %llu sectors (%llu MB)", 1003 drive->name, capacity, sectors_to_MB(capacity)); 1004 1005 /* Only print cache size when it was specified */ 1006 if (id->buf_size) 1007 printk (" w/%dKiB Cache", id->buf_size/2); 1008 1009 printk(", CHS=%d/%d/%d", 1010 drive->bios_cyl, drive->bios_head, drive->bios_sect); 1011 if (drive->using_dma) 1012 ide_dma_verbose(drive); 1013 printk("\n"); 1014 1015 /* write cache enabled? */ 1016 if ((id->csfo & 1) || (id->cfs_enable_1 & (1 << 5))) 1017 drive->wcache = 1; 1018 1019 write_cache(drive, 1); 1020} 1021 1022static 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 1031static void ide_disk_remove(ide_drive_t *drive) 1032{ 1033 struct ide_disk_obj *idkp = drive->driver_data; 1034 struct gendisk *g = idkp->disk; 1035 1036 ide_proc_unregister_driver(drive, idkp->driver); 1037 1038 del_gendisk(g); 1039 1040 ide_cacheflush_p(drive); 1041 1042 ide_disk_put(idkp); 1043} 1044 1045static void ide_disk_release(struct kref *kref) 1046{ 1047 struct ide_disk_obj *idkp = to_ide_disk(kref); 1048 ide_drive_t *drive = idkp->drive; 1049 struct gendisk *g = idkp->disk; 1050 1051 drive->driver_data = NULL; 1052 g->private_data = NULL; 1053 put_disk(g); 1054 kfree(idkp); 1055} 1056 1057static int ide_disk_probe(ide_drive_t *drive); 1058 1059/* 1060 * On HPA drives the capacity needs to be 1061 * reinitilized on resume otherwise the disk 1062 * can not be used and a hard reset is required 1063 */ 1064static void ide_disk_resume(ide_drive_t *drive) 1065{ 1066 if (idedisk_supports_hpa(drive->id)) 1067 init_idedisk_capacity(drive); 1068} 1069 1070static void ide_device_shutdown(ide_drive_t *drive) 1071{ 1072#ifdef CONFIG_ALPHA 1073 /* On Alpha, halt(8) doesn't actually turn the machine off, 1074 it puts you into the sort of firmware monitor. Typically, 1075 it's used to boot another kernel image, so it's not much 1076 different from reboot(8). Therefore, we don't need to 1077 spin down the disk in this case, especially since Alpha 1078 firmware doesn't handle disks in standby mode properly. 1079 On the other hand, it's reasonably safe to turn the power 1080 off when the shutdown process reaches the firmware prompt, 1081 as the firmware initialization takes rather long time - 1082 at least 10 seconds, which should be sufficient for 1083 the disk to expire its write cache. */ 1084 if (system_state != SYSTEM_POWER_OFF) { 1085#else 1086 if (system_state == SYSTEM_RESTART) { 1087#endif 1088 ide_cacheflush_p(drive); 1089 return; 1090 } 1091 1092 printk("Shutdown: %s\n", drive->name); 1093 drive->gendev.bus->suspend(&drive->gendev, PMSG_SUSPEND); 1094} 1095 1096static ide_driver_t idedisk_driver = { 1097 .gen_driver = { 1098 .owner = THIS_MODULE, 1099 .name = "ide-disk", 1100 .bus = &ide_bus_type, 1101 }, 1102 .probe = ide_disk_probe, 1103 .remove = ide_disk_remove, 1104 .resume = ide_disk_resume, 1105 .shutdown = ide_device_shutdown, 1106 .version = IDEDISK_VERSION, 1107 .media = ide_disk, 1108 .supports_dsc_overlap = 0, 1109 .do_request = ide_do_rw_disk, 1110 .end_request = ide_end_request, 1111 .error = __ide_error, 1112 .abort = __ide_abort, 1113#ifdef CONFIG_IDE_PROC_FS 1114 .proc = idedisk_proc, 1115#endif 1116}; 1117 1118static int idedisk_open(struct inode *inode, struct file *filp) 1119{ 1120 struct gendisk *disk = inode->i_bdev->bd_disk; 1121 struct ide_disk_obj *idkp; 1122 ide_drive_t *drive; 1123 1124 if (!(idkp = ide_disk_get(disk))) 1125 return -ENXIO; 1126 1127 drive = idkp->drive; 1128 1129 idkp->openers++; 1130 1131 if (drive->removable && idkp->openers == 1) { 1132 ide_task_t args; 1133 memset(&args, 0, sizeof(ide_task_t)); 1134 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_DOORLOCK; 1135 args.command_type = IDE_DRIVE_TASK_NO_DATA; 1136 args.handler = &task_no_data_intr; 1137 check_disk_change(inode->i_bdev); 1138 /* 1139 * Ignore the return code from door_lock, 1140 * since the open() has already succeeded, 1141 * and the door_lock is irrelevant at this point. 1142 */ 1143 if (drive->doorlocking && ide_raw_taskfile(drive, &args, NULL)) 1144 drive->doorlocking = 0; 1145 } 1146 return 0; 1147} 1148 1149static int idedisk_release(struct inode *inode, struct file *filp) 1150{ 1151 struct gendisk *disk = inode->i_bdev->bd_disk; 1152 struct ide_disk_obj *idkp = ide_disk_g(disk); 1153 ide_drive_t *drive = idkp->drive; 1154 1155 if (idkp->openers == 1) 1156 ide_cacheflush_p(drive); 1157 1158 if (drive->removable && idkp->openers == 1) { 1159 ide_task_t args; 1160 memset(&args, 0, sizeof(ide_task_t)); 1161 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_DOORUNLOCK; 1162 args.command_type = IDE_DRIVE_TASK_NO_DATA; 1163 args.handler = &task_no_data_intr; 1164 if (drive->doorlocking && ide_raw_taskfile(drive, &args, NULL)) 1165 drive->doorlocking = 0; 1166 } 1167 1168 idkp->openers--; 1169 1170 ide_disk_put(idkp); 1171 1172 return 0; 1173} 1174 1175static int idedisk_getgeo(struct block_device *bdev, struct hd_geometry *geo) 1176{ 1177 struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk); 1178 ide_drive_t *drive = idkp->drive; 1179 1180 geo->heads = drive->bios_head; 1181 geo->sectors = drive->bios_sect; 1182 geo->cylinders = (u16)drive->bios_cyl; /* truncate */ 1183 return 0; 1184} 1185 1186static int idedisk_ioctl(struct inode *inode, struct file *file, 1187 unsigned int cmd, unsigned long arg) 1188{ 1189 unsigned long flags; 1190 struct block_device *bdev = inode->i_bdev; 1191 struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk); 1192 ide_drive_t *drive = idkp->drive; 1193 int err, (*setfunc)(ide_drive_t *, int); 1194 u8 *val; 1195 1196 switch (cmd) { 1197 case HDIO_GET_ADDRESS: val = &drive->addressing; goto read_val; 1198 case HDIO_GET_MULTCOUNT: val = &drive->mult_count; goto read_val; 1199 case HDIO_GET_NOWERR: val = &drive->nowerr; goto read_val; 1200 case HDIO_GET_WCACHE: val = &drive->wcache; goto read_val; 1201 case HDIO_GET_ACOUSTIC: val = &drive->acoustic; goto read_val; 1202 case HDIO_SET_ADDRESS: setfunc = set_lba_addressing; goto set_val; 1203 case HDIO_SET_MULTCOUNT: setfunc = set_multcount; goto set_val; 1204 case HDIO_SET_NOWERR: setfunc = set_nowerr; goto set_val; 1205 case HDIO_SET_WCACHE: setfunc = write_cache; goto set_val; 1206 case HDIO_SET_ACOUSTIC: setfunc = set_acoustic; goto set_val; 1207 } 1208 1209 return generic_ide_ioctl(drive, file, bdev, cmd, arg); 1210 1211read_val: 1212 mutex_lock(&ide_setting_mtx); 1213 spin_lock_irqsave(&ide_lock, flags); 1214 err = *val; 1215 spin_unlock_irqrestore(&ide_lock, flags); 1216 mutex_unlock(&ide_setting_mtx); 1217 return err >= 0 ? put_user(err, (long __user *)arg) : err; 1218 1219set_val: 1220 if (bdev != bdev->bd_contains) 1221 err = -EINVAL; 1222 else { 1223 if (!capable(CAP_SYS_ADMIN)) 1224 err = -EACCES; 1225 else { 1226 mutex_lock(&ide_setting_mtx); 1227 err = setfunc(drive, arg); 1228 mutex_unlock(&ide_setting_mtx); 1229 } 1230 } 1231 return err; 1232} 1233 1234static int idedisk_media_changed(struct gendisk *disk) 1235{ 1236 struct ide_disk_obj *idkp = ide_disk_g(disk); 1237 ide_drive_t *drive = idkp->drive; 1238 1239 /* do not scan partitions twice if this is a removable device */ 1240 if (drive->attach) { 1241 drive->attach = 0; 1242 return 0; 1243 } 1244 /* if removable, always assume it was changed */ 1245 return drive->removable; 1246} 1247 1248static int idedisk_revalidate_disk(struct gendisk *disk) 1249{ 1250 struct ide_disk_obj *idkp = ide_disk_g(disk); 1251 set_capacity(disk, idedisk_capacity(idkp->drive)); 1252 return 0; 1253} 1254 1255static struct block_device_operations idedisk_ops = { 1256 .owner = THIS_MODULE, 1257 .open = idedisk_open, 1258 .release = idedisk_release, 1259 .ioctl = idedisk_ioctl, 1260 .getgeo = idedisk_getgeo, 1261 .media_changed = idedisk_media_changed, 1262 .revalidate_disk= idedisk_revalidate_disk 1263}; 1264 1265MODULE_DESCRIPTION("ATA DISK Driver"); 1266 1267static int ide_disk_probe(ide_drive_t *drive) 1268{ 1269 struct ide_disk_obj *idkp; 1270 struct gendisk *g; 1271 1272 /* strstr("foo", "") is non-NULL */ 1273 if (!strstr("ide-disk", drive->driver_req)) 1274 goto failed; 1275 if (!drive->present) 1276 goto failed; 1277 if (drive->media != ide_disk) 1278 goto failed; 1279 1280 idkp = kzalloc(sizeof(*idkp), GFP_KERNEL); 1281 if (!idkp) 1282 goto failed; 1283 1284 g = alloc_disk_node(1 << PARTN_BITS, 1285 hwif_to_node(drive->hwif)); 1286 if (!g) 1287 goto out_free_idkp; 1288 1289 ide_init_disk(g, drive); 1290 1291 ide_proc_register_driver(drive, &idedisk_driver); 1292 1293 kref_init(&idkp->kref); 1294 1295 idkp->drive = drive; 1296 idkp->driver = &idedisk_driver; 1297 idkp->disk = g; 1298 1299 g->private_data = &idkp->driver; 1300 1301 drive->driver_data = idkp; 1302 1303 idedisk_setup(drive); 1304 if ((!drive->head || drive->head > 16) && !drive->select.b.lba) { 1305 printk(KERN_ERR "%s: INVALID GEOMETRY: %d PHYSICAL HEADS?\n", 1306 drive->name, drive->head); 1307 drive->attach = 0; 1308 } else 1309 drive->attach = 1; 1310 1311 g->minors = 1 << PARTN_BITS; 1312 g->driverfs_dev = &drive->gendev; 1313 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; 1314 set_capacity(g, idedisk_capacity(drive)); 1315 g->fops = &idedisk_ops; 1316 add_disk(g); 1317 return 0; 1318 1319out_free_idkp: 1320 kfree(idkp); 1321failed: 1322 return -ENODEV; 1323} 1324 1325static void __exit idedisk_exit (void) 1326{ 1327 driver_unregister(&idedisk_driver.gen_driver); 1328} 1329 1330static int __init idedisk_init(void) 1331{ 1332 return driver_register(&idedisk_driver.gen_driver); 1333} 1334 1335MODULE_ALIAS("ide:*m-disk*"); 1336module_init(idedisk_init); 1337module_exit(idedisk_exit); 1338MODULE_LICENSE("GPL"); 1339