ide.c revision 48c3c1072651922ed153bcf0a33ea82cf20df390
1/* 2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) 3 * Copyrifht (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz 4 */ 5 6/* 7 * Mostly written by Mark Lord <mlord@pobox.com> 8 * and Gadi Oxman <gadio@netvision.net.il> 9 * and Andre Hedrick <andre@linux-ide.org> 10 * 11 * See linux/MAINTAINERS for address of current maintainer. 12 * 13 * This is the multiple IDE interface driver, as evolved from hd.c. 14 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs 15 * (usually 14 & 15). 16 * There can be up to two drives per interface, as per the ATA-2 spec. 17 * 18 * ... 19 * 20 * From hd.c: 21 * | 22 * | It traverses the request-list, using interrupts to jump between functions. 23 * | As nearly all functions can be called within interrupts, we may not sleep. 24 * | Special care is recommended. Have Fun! 25 * | 26 * | modified by Drew Eckhardt to check nr of hd's from the CMOS. 27 * | 28 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug 29 * | in the early extended-partition checks and added DM partitions. 30 * | 31 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI). 32 * | 33 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads", 34 * | and general streamlining by Mark Lord (mlord@pobox.com). 35 * 36 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by: 37 * 38 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg) 39 * Delman Lee (delman@ieee.org) ("Mr. atdisk2") 40 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom) 41 * 42 * This was a rewrite of just about everything from hd.c, though some original 43 * code is still sprinkled about. Think of it as a major evolution, with 44 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au 45 */ 46 47#define _IDE_C /* Tell ide.h it's really us */ 48 49#include <linux/module.h> 50#include <linux/types.h> 51#include <linux/string.h> 52#include <linux/kernel.h> 53#include <linux/interrupt.h> 54#include <linux/major.h> 55#include <linux/errno.h> 56#include <linux/genhd.h> 57#include <linux/slab.h> 58#include <linux/init.h> 59#include <linux/pci.h> 60#include <linux/ide.h> 61#include <linux/completion.h> 62#include <linux/device.h> 63 64 65/* default maximum number of failures */ 66#define IDE_DEFAULT_MAX_FAILURES 1 67 68struct class *ide_port_class; 69 70static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR, 71 IDE2_MAJOR, IDE3_MAJOR, 72 IDE4_MAJOR, IDE5_MAJOR, 73 IDE6_MAJOR, IDE7_MAJOR, 74 IDE8_MAJOR, IDE9_MAJOR }; 75 76DEFINE_MUTEX(ide_cfg_mtx); 77 78__cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock); 79EXPORT_SYMBOL(ide_lock); 80 81static void ide_port_init_devices_data(ide_hwif_t *); 82 83/* 84 * Do not even *think* about calling this! 85 */ 86void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) 87{ 88 /* bulk initialize hwif & drive info with zeros */ 89 memset(hwif, 0, sizeof(ide_hwif_t)); 90 91 /* fill in any non-zero initial values */ 92 hwif->index = index; 93 hwif->major = ide_hwif_to_major[index]; 94 95 hwif->name[0] = 'i'; 96 hwif->name[1] = 'd'; 97 hwif->name[2] = 'e'; 98 hwif->name[3] = '0' + index; 99 100 hwif->bus_state = BUSSTATE_ON; 101 102 init_completion(&hwif->gendev_rel_comp); 103 104 hwif->tp_ops = &default_tp_ops; 105 106 ide_port_init_devices_data(hwif); 107} 108 109static void ide_port_init_devices_data(ide_hwif_t *hwif) 110{ 111 int unit; 112 113 for (unit = 0; unit < MAX_DRIVES; ++unit) { 114 ide_drive_t *drive = &hwif->drives[unit]; 115 u8 j = (hwif->index * MAX_DRIVES) + unit; 116 117 memset(drive, 0, sizeof(*drive)); 118 119 drive->media = ide_disk; 120 drive->select.all = (unit<<4)|0xa0; 121 drive->hwif = hwif; 122 drive->ready_stat = READY_STAT; 123 drive->bad_wstat = BAD_W_STAT; 124 drive->special.b.recalibrate = 1; 125 drive->special.b.set_geometry = 1; 126 drive->name[0] = 'h'; 127 drive->name[1] = 'd'; 128 drive->name[2] = 'a' + j; 129 drive->max_failures = IDE_DEFAULT_MAX_FAILURES; 130 131 INIT_LIST_HEAD(&drive->list); 132 init_completion(&drive->gendev_rel_comp); 133 } 134} 135 136void ide_remove_port_from_hwgroup(ide_hwif_t *hwif) 137{ 138 ide_hwgroup_t *hwgroup = hwif->hwgroup; 139 140 spin_lock_irq(&ide_lock); 141 /* 142 * Remove us from the hwgroup, and free 143 * the hwgroup if we were the only member 144 */ 145 if (hwif->next == hwif) { 146 BUG_ON(hwgroup->hwif != hwif); 147 kfree(hwgroup); 148 } else { 149 /* There is another interface in hwgroup. 150 * Unlink us, and set hwgroup->drive and ->hwif to 151 * something sane. 152 */ 153 ide_hwif_t *g = hwgroup->hwif; 154 155 while (g->next != hwif) 156 g = g->next; 157 g->next = hwif->next; 158 if (hwgroup->hwif == hwif) { 159 /* Chose a random hwif for hwgroup->hwif. 160 * It's guaranteed that there are no drives 161 * left in the hwgroup. 162 */ 163 BUG_ON(hwgroup->drive != NULL); 164 hwgroup->hwif = g; 165 } 166 BUG_ON(hwgroup->hwif == hwif); 167 } 168 spin_unlock_irq(&ide_lock); 169} 170 171/* Called with ide_lock held. */ 172static void __ide_port_unregister_devices(ide_hwif_t *hwif) 173{ 174 int i; 175 176 for (i = 0; i < MAX_DRIVES; i++) { 177 ide_drive_t *drive = &hwif->drives[i]; 178 179 if (drive->present) { 180 spin_unlock_irq(&ide_lock); 181 device_unregister(&drive->gendev); 182 wait_for_completion(&drive->gendev_rel_comp); 183 spin_lock_irq(&ide_lock); 184 } 185 } 186} 187 188void ide_port_unregister_devices(ide_hwif_t *hwif) 189{ 190 mutex_lock(&ide_cfg_mtx); 191 spin_lock_irq(&ide_lock); 192 __ide_port_unregister_devices(hwif); 193 hwif->present = 0; 194 ide_port_init_devices_data(hwif); 195 spin_unlock_irq(&ide_lock); 196 mutex_unlock(&ide_cfg_mtx); 197} 198EXPORT_SYMBOL_GPL(ide_port_unregister_devices); 199 200/** 201 * ide_unregister - free an IDE interface 202 * @hwif: IDE interface 203 * 204 * Perform the final unregister of an IDE interface. At the moment 205 * we don't refcount interfaces so this will also get split up. 206 * 207 * Locking: 208 * The caller must not hold the IDE locks 209 * The drive present/vanishing is not yet properly locked 210 * Take care with the callbacks. These have been split to avoid 211 * deadlocking the IDE layer. The shutdown callback is called 212 * before we take the lock and free resources. It is up to the 213 * caller to be sure there is no pending I/O here, and that 214 * the interface will not be reopened (present/vanishing locking 215 * isn't yet done BTW). After we commit to the final kill we 216 * call the cleanup callback with the ide locks held. 217 * 218 * Unregister restores the hwif structures to the default state. 219 * This is raving bonkers. 220 */ 221 222void ide_unregister(ide_hwif_t *hwif) 223{ 224 ide_hwif_t *g; 225 ide_hwgroup_t *hwgroup; 226 int irq_count = 0; 227 228 BUG_ON(in_interrupt()); 229 BUG_ON(irqs_disabled()); 230 231 mutex_lock(&ide_cfg_mtx); 232 233 spin_lock_irq(&ide_lock); 234 if (hwif->present) { 235 __ide_port_unregister_devices(hwif); 236 hwif->present = 0; 237 } 238 spin_unlock_irq(&ide_lock); 239 240 ide_proc_unregister_port(hwif); 241 242 hwgroup = hwif->hwgroup; 243 /* 244 * free the irq if we were the only hwif using it 245 */ 246 g = hwgroup->hwif; 247 do { 248 if (g->irq == hwif->irq) 249 ++irq_count; 250 g = g->next; 251 } while (g != hwgroup->hwif); 252 if (irq_count == 1) 253 free_irq(hwif->irq, hwgroup); 254 255 ide_remove_port_from_hwgroup(hwif); 256 257 device_unregister(hwif->portdev); 258 device_unregister(&hwif->gendev); 259 wait_for_completion(&hwif->gendev_rel_comp); 260 261 /* 262 * Remove us from the kernel's knowledge 263 */ 264 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); 265 kfree(hwif->sg_table); 266 unregister_blkdev(hwif->major, hwif->name); 267 268 if (hwif->dma_base) 269 ide_release_dma_engine(hwif); 270 271 spin_lock_irq(&ide_lock); 272 /* restore hwif data to pristine status */ 273 ide_init_port_data(hwif, hwif->index); 274 spin_unlock_irq(&ide_lock); 275 276 mutex_unlock(&ide_cfg_mtx); 277} 278 279void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw) 280{ 281 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); 282 hwif->irq = hw->irq; 283 hwif->chipset = hw->chipset; 284 hwif->dev = hw->dev; 285 hwif->gendev.parent = hw->parent ? hw->parent : hw->dev; 286 hwif->ack_intr = hw->ack_intr; 287 hwif->config_data = hw->config; 288} 289 290/* 291 * Locks for IDE setting functionality 292 */ 293 294DEFINE_MUTEX(ide_setting_mtx); 295 296EXPORT_SYMBOL_GPL(ide_setting_mtx); 297 298/** 299 * ide_spin_wait_hwgroup - wait for group 300 * @drive: drive in the group 301 * 302 * Wait for an IDE device group to go non busy and then return 303 * holding the ide_lock which guards the hwgroup->busy status 304 * and right to use it. 305 */ 306 307int ide_spin_wait_hwgroup (ide_drive_t *drive) 308{ 309 ide_hwgroup_t *hwgroup = HWGROUP(drive); 310 unsigned long timeout = jiffies + (3 * HZ); 311 312 spin_lock_irq(&ide_lock); 313 314 while (hwgroup->busy) { 315 unsigned long lflags; 316 spin_unlock_irq(&ide_lock); 317 local_irq_set(lflags); 318 if (time_after(jiffies, timeout)) { 319 local_irq_restore(lflags); 320 printk(KERN_ERR "%s: channel busy\n", drive->name); 321 return -EBUSY; 322 } 323 local_irq_restore(lflags); 324 spin_lock_irq(&ide_lock); 325 } 326 return 0; 327} 328 329EXPORT_SYMBOL(ide_spin_wait_hwgroup); 330 331int set_io_32bit(ide_drive_t *drive, int arg) 332{ 333 if (drive->no_io_32bit) 334 return -EPERM; 335 336 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1)) 337 return -EINVAL; 338 339 if (ide_spin_wait_hwgroup(drive)) 340 return -EBUSY; 341 342 drive->io_32bit = arg; 343 344 spin_unlock_irq(&ide_lock); 345 346 return 0; 347} 348 349static int set_ksettings(ide_drive_t *drive, int arg) 350{ 351 if (arg < 0 || arg > 1) 352 return -EINVAL; 353 354 if (ide_spin_wait_hwgroup(drive)) 355 return -EBUSY; 356 drive->keep_settings = arg; 357 spin_unlock_irq(&ide_lock); 358 359 return 0; 360} 361 362int set_using_dma(ide_drive_t *drive, int arg) 363{ 364#ifdef CONFIG_BLK_DEV_IDEDMA 365 ide_hwif_t *hwif = drive->hwif; 366 int err = -EPERM; 367 368 if (arg < 0 || arg > 1) 369 return -EINVAL; 370 371 if (!drive->id || !(drive->id->capability & 1)) 372 goto out; 373 374 if (hwif->dma_ops == NULL) 375 goto out; 376 377 err = -EBUSY; 378 if (ide_spin_wait_hwgroup(drive)) 379 goto out; 380 /* 381 * set ->busy flag, unlock and let it ride 382 */ 383 hwif->hwgroup->busy = 1; 384 spin_unlock_irq(&ide_lock); 385 386 err = 0; 387 388 if (arg) { 389 if (ide_set_dma(drive)) 390 err = -EIO; 391 } else 392 ide_dma_off(drive); 393 394 /* 395 * lock, clear ->busy flag and unlock before leaving 396 */ 397 spin_lock_irq(&ide_lock); 398 hwif->hwgroup->busy = 0; 399 spin_unlock_irq(&ide_lock); 400out: 401 return err; 402#else 403 if (arg < 0 || arg > 1) 404 return -EINVAL; 405 406 return -EPERM; 407#endif 408} 409 410int set_pio_mode(ide_drive_t *drive, int arg) 411{ 412 struct request *rq; 413 ide_hwif_t *hwif = drive->hwif; 414 const struct ide_port_ops *port_ops = hwif->port_ops; 415 416 if (arg < 0 || arg > 255) 417 return -EINVAL; 418 419 if (port_ops == NULL || port_ops->set_pio_mode == NULL || 420 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)) 421 return -ENOSYS; 422 423 if (drive->special.b.set_tune) 424 return -EBUSY; 425 426 rq = blk_get_request(drive->queue, READ, __GFP_WAIT); 427 rq->cmd_type = REQ_TYPE_ATA_TASKFILE; 428 429 drive->tune_req = (u8) arg; 430 drive->special.b.set_tune = 1; 431 432 blk_execute_rq(drive->queue, NULL, rq, 0); 433 blk_put_request(rq); 434 435 return 0; 436} 437 438static int set_unmaskirq(ide_drive_t *drive, int arg) 439{ 440 if (drive->no_unmask) 441 return -EPERM; 442 443 if (arg < 0 || arg > 1) 444 return -EINVAL; 445 446 if (ide_spin_wait_hwgroup(drive)) 447 return -EBUSY; 448 drive->unmask = arg; 449 spin_unlock_irq(&ide_lock); 450 451 return 0; 452} 453 454static int generic_ide_suspend(struct device *dev, pm_message_t mesg) 455{ 456 ide_drive_t *drive = dev->driver_data; 457 ide_hwif_t *hwif = HWIF(drive); 458 struct request *rq; 459 struct request_pm_state rqpm; 460 ide_task_t args; 461 int ret; 462 463 /* Call ACPI _GTM only once */ 464 if (!(drive->dn % 2)) 465 ide_acpi_get_timing(hwif); 466 467 memset(&rqpm, 0, sizeof(rqpm)); 468 memset(&args, 0, sizeof(args)); 469 rq = blk_get_request(drive->queue, READ, __GFP_WAIT); 470 rq->cmd_type = REQ_TYPE_PM_SUSPEND; 471 rq->special = &args; 472 rq->data = &rqpm; 473 rqpm.pm_step = ide_pm_state_start_suspend; 474 if (mesg.event == PM_EVENT_PRETHAW) 475 mesg.event = PM_EVENT_FREEZE; 476 rqpm.pm_state = mesg.event; 477 478 ret = blk_execute_rq(drive->queue, NULL, rq, 0); 479 blk_put_request(rq); 480 /* only call ACPI _PS3 after both drivers are suspended */ 481 if (!ret && (((drive->dn % 2) && hwif->drives[0].present 482 && hwif->drives[1].present) 483 || !hwif->drives[0].present 484 || !hwif->drives[1].present)) 485 ide_acpi_set_state(hwif, 0); 486 return ret; 487} 488 489static int generic_ide_resume(struct device *dev) 490{ 491 ide_drive_t *drive = dev->driver_data; 492 ide_hwif_t *hwif = HWIF(drive); 493 struct request *rq; 494 struct request_pm_state rqpm; 495 ide_task_t args; 496 int err; 497 498 /* Call ACPI _STM only once */ 499 if (!(drive->dn % 2)) { 500 ide_acpi_set_state(hwif, 1); 501 ide_acpi_push_timing(hwif); 502 } 503 504 ide_acpi_exec_tfs(drive); 505 506 memset(&rqpm, 0, sizeof(rqpm)); 507 memset(&args, 0, sizeof(args)); 508 rq = blk_get_request(drive->queue, READ, __GFP_WAIT); 509 rq->cmd_type = REQ_TYPE_PM_RESUME; 510 rq->cmd_flags |= REQ_PREEMPT; 511 rq->special = &args; 512 rq->data = &rqpm; 513 rqpm.pm_step = ide_pm_state_start_resume; 514 rqpm.pm_state = PM_EVENT_ON; 515 516 err = blk_execute_rq(drive->queue, NULL, rq, 1); 517 blk_put_request(rq); 518 519 if (err == 0 && dev->driver) { 520 ide_driver_t *drv = to_ide_driver(dev->driver); 521 522 if (drv->resume) 523 drv->resume(drive); 524 } 525 526 return err; 527} 528 529static int generic_drive_reset(ide_drive_t *drive) 530{ 531 struct request *rq; 532 int ret = 0; 533 534 rq = blk_get_request(drive->queue, READ, __GFP_WAIT); 535 rq->cmd_type = REQ_TYPE_SPECIAL; 536 rq->cmd_len = 1; 537 rq->cmd[0] = REQ_DRIVE_RESET; 538 rq->cmd_flags |= REQ_SOFTBARRIER; 539 if (blk_execute_rq(drive->queue, NULL, rq, 1)) 540 ret = rq->errors; 541 blk_put_request(rq); 542 return ret; 543} 544 545int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev, 546 unsigned int cmd, unsigned long arg) 547{ 548 unsigned long flags; 549 ide_driver_t *drv; 550 void __user *p = (void __user *)arg; 551 int err = 0, (*setfunc)(ide_drive_t *, int); 552 u8 *val; 553 554 switch (cmd) { 555 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val; 556 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val; 557 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val; 558 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val; 559 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val; 560 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val; 561 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val; 562 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val; 563 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val; 564 } 565 566 switch (cmd) { 567 case HDIO_OBSOLETE_IDENTITY: 568 case HDIO_GET_IDENTITY: 569 if (bdev != bdev->bd_contains) 570 return -EINVAL; 571 if (drive->id_read == 0) 572 return -ENOMSG; 573 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142)) 574 return -EFAULT; 575 return 0; 576 577 case HDIO_GET_NICE: 578 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP | 579 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP | 580 drive->nice1 << IDE_NICE_1, 581 (long __user *) arg); 582#ifdef CONFIG_IDE_TASK_IOCTL 583 case HDIO_DRIVE_TASKFILE: 584 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 585 return -EACCES; 586 switch(drive->media) { 587 case ide_disk: 588 return ide_taskfile_ioctl(drive, cmd, arg); 589 default: 590 return -ENOMSG; 591 } 592#endif /* CONFIG_IDE_TASK_IOCTL */ 593 594 case HDIO_DRIVE_CMD: 595 if (!capable(CAP_SYS_RAWIO)) 596 return -EACCES; 597 return ide_cmd_ioctl(drive, cmd, arg); 598 599 case HDIO_DRIVE_TASK: 600 if (!capable(CAP_SYS_RAWIO)) 601 return -EACCES; 602 return ide_task_ioctl(drive, cmd, arg); 603 case HDIO_SET_NICE: 604 if (!capable(CAP_SYS_ADMIN)) return -EACCES; 605 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1)))) 606 return -EPERM; 607 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1; 608 drv = *(ide_driver_t **)bdev->bd_disk->private_data; 609 if (drive->dsc_overlap && !drv->supports_dsc_overlap) { 610 drive->dsc_overlap = 0; 611 return -EPERM; 612 } 613 drive->nice1 = (arg >> IDE_NICE_1) & 1; 614 return 0; 615 case HDIO_DRIVE_RESET: 616 if (!capable(CAP_SYS_ADMIN)) 617 return -EACCES; 618 619 return generic_drive_reset(drive); 620 621 case HDIO_GET_BUSSTATE: 622 if (!capable(CAP_SYS_ADMIN)) 623 return -EACCES; 624 if (put_user(HWIF(drive)->bus_state, (long __user *)arg)) 625 return -EFAULT; 626 return 0; 627 628 case HDIO_SET_BUSSTATE: 629 if (!capable(CAP_SYS_ADMIN)) 630 return -EACCES; 631 return -EOPNOTSUPP; 632 default: 633 return -EINVAL; 634 } 635 636read_val: 637 mutex_lock(&ide_setting_mtx); 638 spin_lock_irqsave(&ide_lock, flags); 639 err = *val; 640 spin_unlock_irqrestore(&ide_lock, flags); 641 mutex_unlock(&ide_setting_mtx); 642 return err >= 0 ? put_user(err, (long __user *)arg) : err; 643 644set_val: 645 if (bdev != bdev->bd_contains) 646 err = -EINVAL; 647 else { 648 if (!capable(CAP_SYS_ADMIN)) 649 err = -EACCES; 650 else { 651 mutex_lock(&ide_setting_mtx); 652 err = setfunc(drive, arg); 653 mutex_unlock(&ide_setting_mtx); 654 } 655 } 656 return err; 657} 658 659EXPORT_SYMBOL(generic_ide_ioctl); 660 661static int ide_bus_match(struct device *dev, struct device_driver *drv) 662{ 663 return 1; 664} 665 666static char *media_string(ide_drive_t *drive) 667{ 668 switch (drive->media) { 669 case ide_disk: 670 return "disk"; 671 case ide_cdrom: 672 return "cdrom"; 673 case ide_tape: 674 return "tape"; 675 case ide_floppy: 676 return "floppy"; 677 case ide_optical: 678 return "optical"; 679 default: 680 return "UNKNOWN"; 681 } 682} 683 684static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf) 685{ 686 ide_drive_t *drive = to_ide_device(dev); 687 return sprintf(buf, "%s\n", media_string(drive)); 688} 689 690static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf) 691{ 692 ide_drive_t *drive = to_ide_device(dev); 693 return sprintf(buf, "%s\n", drive->name); 694} 695 696static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 697{ 698 ide_drive_t *drive = to_ide_device(dev); 699 return sprintf(buf, "ide:m-%s\n", media_string(drive)); 700} 701 702static ssize_t model_show(struct device *dev, struct device_attribute *attr, 703 char *buf) 704{ 705 ide_drive_t *drive = to_ide_device(dev); 706 return sprintf(buf, "%s\n", drive->id->model); 707} 708 709static ssize_t firmware_show(struct device *dev, struct device_attribute *attr, 710 char *buf) 711{ 712 ide_drive_t *drive = to_ide_device(dev); 713 return sprintf(buf, "%s\n", drive->id->fw_rev); 714} 715 716static ssize_t serial_show(struct device *dev, struct device_attribute *attr, 717 char *buf) 718{ 719 ide_drive_t *drive = to_ide_device(dev); 720 return sprintf(buf, "%s\n", drive->id->serial_no); 721} 722 723static struct device_attribute ide_dev_attrs[] = { 724 __ATTR_RO(media), 725 __ATTR_RO(drivename), 726 __ATTR_RO(modalias), 727 __ATTR_RO(model), 728 __ATTR_RO(firmware), 729 __ATTR(serial, 0400, serial_show, NULL), 730 __ATTR_NULL 731}; 732 733static int ide_uevent(struct device *dev, struct kobj_uevent_env *env) 734{ 735 ide_drive_t *drive = to_ide_device(dev); 736 737 add_uevent_var(env, "MEDIA=%s", media_string(drive)); 738 add_uevent_var(env, "DRIVENAME=%s", drive->name); 739 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive)); 740 return 0; 741} 742 743static int generic_ide_probe(struct device *dev) 744{ 745 ide_drive_t *drive = to_ide_device(dev); 746 ide_driver_t *drv = to_ide_driver(dev->driver); 747 748 return drv->probe ? drv->probe(drive) : -ENODEV; 749} 750 751static int generic_ide_remove(struct device *dev) 752{ 753 ide_drive_t *drive = to_ide_device(dev); 754 ide_driver_t *drv = to_ide_driver(dev->driver); 755 756 if (drv->remove) 757 drv->remove(drive); 758 759 return 0; 760} 761 762static void generic_ide_shutdown(struct device *dev) 763{ 764 ide_drive_t *drive = to_ide_device(dev); 765 ide_driver_t *drv = to_ide_driver(dev->driver); 766 767 if (dev->driver && drv->shutdown) 768 drv->shutdown(drive); 769} 770 771struct bus_type ide_bus_type = { 772 .name = "ide", 773 .match = ide_bus_match, 774 .uevent = ide_uevent, 775 .probe = generic_ide_probe, 776 .remove = generic_ide_remove, 777 .shutdown = generic_ide_shutdown, 778 .dev_attrs = ide_dev_attrs, 779 .suspend = generic_ide_suspend, 780 .resume = generic_ide_resume, 781}; 782 783EXPORT_SYMBOL_GPL(ide_bus_type); 784 785int ide_vlb_clk; 786EXPORT_SYMBOL_GPL(ide_vlb_clk); 787 788module_param_named(vlb_clock, ide_vlb_clk, int, 0); 789MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)"); 790 791int ide_pci_clk; 792EXPORT_SYMBOL_GPL(ide_pci_clk); 793 794module_param_named(pci_clock, ide_pci_clk, int, 0); 795MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)"); 796 797static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp) 798{ 799 int a, b, i, j = 1; 800 unsigned int *dev_param_mask = (unsigned int *)kp->arg; 801 802 if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 && 803 sscanf(s, "%d.%d", &a, &b) != 2) 804 return -EINVAL; 805 806 i = a * MAX_DRIVES + b; 807 808 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) 809 return -EINVAL; 810 811 if (j) 812 *dev_param_mask |= (1 << i); 813 else 814 *dev_param_mask &= (1 << i); 815 816 return 0; 817} 818 819static unsigned int ide_nodma; 820 821module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0); 822MODULE_PARM_DESC(nodma, "disallow DMA for a device"); 823 824static unsigned int ide_noflush; 825 826module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0); 827MODULE_PARM_DESC(noflush, "disable flush requests for a device"); 828 829static unsigned int ide_noprobe; 830 831module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0); 832MODULE_PARM_DESC(noprobe, "skip probing for a device"); 833 834static unsigned int ide_nowerr; 835 836module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0); 837MODULE_PARM_DESC(nowerr, "ignore the WRERR_STAT bit for a device"); 838 839static unsigned int ide_cdroms; 840 841module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0); 842MODULE_PARM_DESC(cdrom, "force device as a CD-ROM"); 843 844struct chs_geom { 845 unsigned int cyl; 846 u8 head; 847 u8 sect; 848}; 849 850static unsigned int ide_disks; 851static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES]; 852 853static int ide_set_disk_chs(const char *str, struct kernel_param *kp) 854{ 855 int a, b, c = 0, h = 0, s = 0, i, j = 1; 856 857 if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 && 858 sscanf(str, "%d.%d:%d", &a, &b, &j) != 3) 859 return -EINVAL; 860 861 i = a * MAX_DRIVES + b; 862 863 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) 864 return -EINVAL; 865 866 if (c > INT_MAX || h > 255 || s > 255) 867 return -EINVAL; 868 869 if (j) 870 ide_disks |= (1 << i); 871 else 872 ide_disks &= (1 << i); 873 874 ide_disks_chs[i].cyl = c; 875 ide_disks_chs[i].head = h; 876 ide_disks_chs[i].sect = s; 877 878 return 0; 879} 880 881module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0); 882MODULE_PARM_DESC(chs, "force device as a disk (using CHS)"); 883 884static void ide_dev_apply_params(ide_drive_t *drive) 885{ 886 int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit; 887 888 if (ide_nodma & (1 << i)) { 889 printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name); 890 drive->nodma = 1; 891 } 892 if (ide_noflush & (1 << i)) { 893 printk(KERN_INFO "ide: disabling flush requests for %s\n", 894 drive->name); 895 drive->noflush = 1; 896 } 897 if (ide_noprobe & (1 << i)) { 898 printk(KERN_INFO "ide: skipping probe for %s\n", drive->name); 899 drive->noprobe = 1; 900 } 901 if (ide_nowerr & (1 << i)) { 902 printk(KERN_INFO "ide: ignoring the WRERR_STAT bit for %s\n", 903 drive->name); 904 drive->bad_wstat = BAD_R_STAT; 905 } 906 if (ide_cdroms & (1 << i)) { 907 printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name); 908 drive->present = 1; 909 drive->media = ide_cdrom; 910 /* an ATAPI device ignores DRDY */ 911 drive->ready_stat = 0; 912 } 913 if (ide_disks & (1 << i)) { 914 drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl; 915 drive->head = drive->bios_head = ide_disks_chs[i].head; 916 drive->sect = drive->bios_sect = ide_disks_chs[i].sect; 917 drive->forced_geom = 1; 918 printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n", 919 drive->name, 920 drive->cyl, drive->head, drive->sect); 921 drive->present = 1; 922 drive->media = ide_disk; 923 drive->ready_stat = READY_STAT; 924 } 925} 926 927static unsigned int ide_ignore_cable; 928 929static int ide_set_ignore_cable(const char *s, struct kernel_param *kp) 930{ 931 int i, j = 1; 932 933 if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1) 934 return -EINVAL; 935 936 if (i >= MAX_HWIFS || j < 0 || j > 1) 937 return -EINVAL; 938 939 if (j) 940 ide_ignore_cable |= (1 << i); 941 else 942 ide_ignore_cable &= (1 << i); 943 944 return 0; 945} 946 947module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0); 948MODULE_PARM_DESC(ignore_cable, "ignore cable detection"); 949 950void ide_port_apply_params(ide_hwif_t *hwif) 951{ 952 int i; 953 954 if (ide_ignore_cable & (1 << hwif->index)) { 955 printk(KERN_INFO "ide: ignoring cable detection for %s\n", 956 hwif->name); 957 hwif->cbl = ATA_CBL_PATA40_SHORT; 958 } 959 960 for (i = 0; i < MAX_DRIVES; i++) 961 ide_dev_apply_params(&hwif->drives[i]); 962} 963 964/* 965 * This is gets invoked once during initialization, to set *everything* up 966 */ 967static int __init ide_init(void) 968{ 969 int ret; 970 971 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n"); 972 973 ret = bus_register(&ide_bus_type); 974 if (ret < 0) { 975 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret); 976 return ret; 977 } 978 979 ide_port_class = class_create(THIS_MODULE, "ide_port"); 980 if (IS_ERR(ide_port_class)) { 981 ret = PTR_ERR(ide_port_class); 982 goto out_port_class; 983 } 984 985 proc_ide_create(); 986 987 return 0; 988 989out_port_class: 990 bus_unregister(&ide_bus_type); 991 992 return ret; 993} 994 995static void __exit ide_exit(void) 996{ 997 proc_ide_destroy(); 998 999 class_destroy(ide_port_class); 1000 1001 bus_unregister(&ide_bus_type); 1002} 1003 1004module_init(ide_init); 1005module_exit(ide_exit); 1006 1007MODULE_LICENSE("GPL"); 1008