ide.c revision 9232c14bff36d65de254f34386c00b732c5b6099
1/* 2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) 3 * Copyright (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#include <linux/module.h> 48#include <linux/types.h> 49#include <linux/string.h> 50#include <linux/kernel.h> 51#include <linux/interrupt.h> 52#include <linux/major.h> 53#include <linux/errno.h> 54#include <linux/genhd.h> 55#include <linux/slab.h> 56#include <linux/init.h> 57#include <linux/pci.h> 58#include <linux/ide.h> 59#include <linux/hdreg.h> 60#include <linux/completion.h> 61#include <linux/device.h> 62 63 64/* default maximum number of failures */ 65#define IDE_DEFAULT_MAX_FAILURES 1 66 67struct class *ide_port_class; 68 69static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR, 70 IDE2_MAJOR, IDE3_MAJOR, 71 IDE4_MAJOR, IDE5_MAJOR, 72 IDE6_MAJOR, IDE7_MAJOR, 73 IDE8_MAJOR, IDE9_MAJOR }; 74 75DEFINE_MUTEX(ide_cfg_mtx); 76 77__cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock); 78EXPORT_SYMBOL(ide_lock); 79 80static void ide_port_init_devices_data(ide_hwif_t *); 81 82/* 83 * Do not even *think* about calling this! 84 */ 85void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) 86{ 87 /* bulk initialize hwif & drive info with zeros */ 88 memset(hwif, 0, sizeof(ide_hwif_t)); 89 90 /* fill in any non-zero initial values */ 91 hwif->index = index; 92 hwif->major = ide_hwif_to_major[index]; 93 94 hwif->name[0] = 'i'; 95 hwif->name[1] = 'd'; 96 hwif->name[2] = 'e'; 97 hwif->name[3] = '0' + index; 98 99 init_completion(&hwif->gendev_rel_comp); 100 101 hwif->tp_ops = &default_tp_ops; 102 103 ide_port_init_devices_data(hwif); 104} 105 106static void ide_port_init_devices_data(ide_hwif_t *hwif) 107{ 108 int unit; 109 110 for (unit = 0; unit < MAX_DRIVES; ++unit) { 111 ide_drive_t *drive = &hwif->drives[unit]; 112 u8 j = (hwif->index * MAX_DRIVES) + unit; 113 114 memset(drive, 0, sizeof(*drive)); 115 116 drive->media = ide_disk; 117 drive->select.all = (unit<<4)|0xa0; 118 drive->hwif = hwif; 119 drive->ready_stat = ATA_DRDY; 120 drive->bad_wstat = BAD_W_STAT; 121 drive->special.b.recalibrate = 1; 122 drive->special.b.set_geometry = 1; 123 drive->name[0] = 'h'; 124 drive->name[1] = 'd'; 125 drive->name[2] = 'a' + j; 126 drive->max_failures = IDE_DEFAULT_MAX_FAILURES; 127 128 INIT_LIST_HEAD(&drive->list); 129 init_completion(&drive->gendev_rel_comp); 130 } 131} 132 133/* Called with ide_lock held. */ 134static void __ide_port_unregister_devices(ide_hwif_t *hwif) 135{ 136 int i; 137 138 for (i = 0; i < MAX_DRIVES; i++) { 139 ide_drive_t *drive = &hwif->drives[i]; 140 141 if (drive->present) { 142 spin_unlock_irq(&ide_lock); 143 device_unregister(&drive->gendev); 144 wait_for_completion(&drive->gendev_rel_comp); 145 spin_lock_irq(&ide_lock); 146 } 147 } 148} 149 150void ide_port_unregister_devices(ide_hwif_t *hwif) 151{ 152 mutex_lock(&ide_cfg_mtx); 153 spin_lock_irq(&ide_lock); 154 __ide_port_unregister_devices(hwif); 155 hwif->present = 0; 156 ide_port_init_devices_data(hwif); 157 spin_unlock_irq(&ide_lock); 158 mutex_unlock(&ide_cfg_mtx); 159} 160EXPORT_SYMBOL_GPL(ide_port_unregister_devices); 161 162/** 163 * ide_unregister - free an IDE interface 164 * @hwif: IDE interface 165 * 166 * Perform the final unregister of an IDE interface. At the moment 167 * we don't refcount interfaces so this will also get split up. 168 * 169 * Locking: 170 * The caller must not hold the IDE locks 171 * The drive present/vanishing is not yet properly locked 172 * Take care with the callbacks. These have been split to avoid 173 * deadlocking the IDE layer. The shutdown callback is called 174 * before we take the lock and free resources. It is up to the 175 * caller to be sure there is no pending I/O here, and that 176 * the interface will not be reopened (present/vanishing locking 177 * isn't yet done BTW). After we commit to the final kill we 178 * call the cleanup callback with the ide locks held. 179 * 180 * Unregister restores the hwif structures to the default state. 181 * This is raving bonkers. 182 */ 183 184void ide_unregister(ide_hwif_t *hwif) 185{ 186 ide_hwif_t *g; 187 ide_hwgroup_t *hwgroup; 188 int irq_count = 0; 189 190 BUG_ON(in_interrupt()); 191 BUG_ON(irqs_disabled()); 192 193 mutex_lock(&ide_cfg_mtx); 194 195 spin_lock_irq(&ide_lock); 196 if (hwif->present) { 197 __ide_port_unregister_devices(hwif); 198 hwif->present = 0; 199 } 200 spin_unlock_irq(&ide_lock); 201 202 ide_proc_unregister_port(hwif); 203 204 hwgroup = hwif->hwgroup; 205 /* 206 * free the irq if we were the only hwif using it 207 */ 208 g = hwgroup->hwif; 209 do { 210 if (g->irq == hwif->irq) 211 ++irq_count; 212 g = g->next; 213 } while (g != hwgroup->hwif); 214 if (irq_count == 1) 215 free_irq(hwif->irq, hwgroup); 216 217 ide_remove_port_from_hwgroup(hwif); 218 219 device_unregister(hwif->portdev); 220 device_unregister(&hwif->gendev); 221 wait_for_completion(&hwif->gendev_rel_comp); 222 223 /* 224 * Remove us from the kernel's knowledge 225 */ 226 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); 227 kfree(hwif->sg_table); 228 unregister_blkdev(hwif->major, hwif->name); 229 230 if (hwif->dma_base) 231 ide_release_dma_engine(hwif); 232 233 mutex_unlock(&ide_cfg_mtx); 234} 235 236void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw) 237{ 238 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); 239 hwif->irq = hw->irq; 240 hwif->chipset = hw->chipset; 241 hwif->dev = hw->dev; 242 hwif->gendev.parent = hw->parent ? hw->parent : hw->dev; 243 hwif->ack_intr = hw->ack_intr; 244 hwif->config_data = hw->config; 245} 246 247/* 248 * Locks for IDE setting functionality 249 */ 250 251DEFINE_MUTEX(ide_setting_mtx); 252 253EXPORT_SYMBOL_GPL(ide_setting_mtx); 254 255/** 256 * ide_spin_wait_hwgroup - wait for group 257 * @drive: drive in the group 258 * 259 * Wait for an IDE device group to go non busy and then return 260 * holding the ide_lock which guards the hwgroup->busy status 261 * and right to use it. 262 */ 263 264int ide_spin_wait_hwgroup (ide_drive_t *drive) 265{ 266 ide_hwgroup_t *hwgroup = HWGROUP(drive); 267 unsigned long timeout = jiffies + (3 * HZ); 268 269 spin_lock_irq(&ide_lock); 270 271 while (hwgroup->busy) { 272 unsigned long lflags; 273 spin_unlock_irq(&ide_lock); 274 local_irq_set(lflags); 275 if (time_after(jiffies, timeout)) { 276 local_irq_restore(lflags); 277 printk(KERN_ERR "%s: channel busy\n", drive->name); 278 return -EBUSY; 279 } 280 local_irq_restore(lflags); 281 spin_lock_irq(&ide_lock); 282 } 283 return 0; 284} 285 286EXPORT_SYMBOL(ide_spin_wait_hwgroup); 287 288ide_devset_get(io_32bit, io_32bit); 289 290int set_io_32bit(ide_drive_t *drive, int arg) 291{ 292 if (drive->no_io_32bit) 293 return -EPERM; 294 295 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1)) 296 return -EINVAL; 297 298 if (ide_spin_wait_hwgroup(drive)) 299 return -EBUSY; 300 301 drive->io_32bit = arg; 302 303 spin_unlock_irq(&ide_lock); 304 305 return 0; 306} 307 308ide_devset_get(ksettings, keep_settings); 309 310int set_ksettings(ide_drive_t *drive, int arg) 311{ 312 if (arg < 0 || arg > 1) 313 return -EINVAL; 314 315 if (ide_spin_wait_hwgroup(drive)) 316 return -EBUSY; 317 drive->keep_settings = arg; 318 spin_unlock_irq(&ide_lock); 319 320 return 0; 321} 322 323ide_devset_get(using_dma, using_dma); 324 325int set_using_dma(ide_drive_t *drive, int arg) 326{ 327#ifdef CONFIG_BLK_DEV_IDEDMA 328 ide_hwif_t *hwif = drive->hwif; 329 int err = -EPERM; 330 331 if (arg < 0 || arg > 1) 332 return -EINVAL; 333 334 if (ata_id_has_dma(drive->id) == 0) 335 goto out; 336 337 if (hwif->dma_ops == NULL) 338 goto out; 339 340 err = -EBUSY; 341 if (ide_spin_wait_hwgroup(drive)) 342 goto out; 343 /* 344 * set ->busy flag, unlock and let it ride 345 */ 346 hwif->hwgroup->busy = 1; 347 spin_unlock_irq(&ide_lock); 348 349 err = 0; 350 351 if (arg) { 352 if (ide_set_dma(drive)) 353 err = -EIO; 354 } else 355 ide_dma_off(drive); 356 357 /* 358 * lock, clear ->busy flag and unlock before leaving 359 */ 360 spin_lock_irq(&ide_lock); 361 hwif->hwgroup->busy = 0; 362 spin_unlock_irq(&ide_lock); 363out: 364 return err; 365#else 366 if (arg < 0 || arg > 1) 367 return -EINVAL; 368 369 return -EPERM; 370#endif 371} 372 373int set_pio_mode(ide_drive_t *drive, int arg) 374{ 375 struct request *rq; 376 ide_hwif_t *hwif = drive->hwif; 377 const struct ide_port_ops *port_ops = hwif->port_ops; 378 379 if (arg < 0 || arg > 255) 380 return -EINVAL; 381 382 if (port_ops == NULL || port_ops->set_pio_mode == NULL || 383 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)) 384 return -ENOSYS; 385 386 if (drive->special.b.set_tune) 387 return -EBUSY; 388 389 rq = blk_get_request(drive->queue, READ, __GFP_WAIT); 390 rq->cmd_type = REQ_TYPE_ATA_TASKFILE; 391 392 drive->tune_req = (u8) arg; 393 drive->special.b.set_tune = 1; 394 395 blk_execute_rq(drive->queue, NULL, rq, 0); 396 blk_put_request(rq); 397 398 return 0; 399} 400 401ide_devset_get(unmaskirq, unmask); 402 403int set_unmaskirq(ide_drive_t *drive, int arg) 404{ 405 if (drive->no_unmask) 406 return -EPERM; 407 408 if (arg < 0 || arg > 1) 409 return -EINVAL; 410 411 if (ide_spin_wait_hwgroup(drive)) 412 return -EBUSY; 413 drive->unmask = arg; 414 spin_unlock_irq(&ide_lock); 415 416 return 0; 417} 418 419static int generic_ide_suspend(struct device *dev, pm_message_t mesg) 420{ 421 ide_drive_t *drive = dev->driver_data; 422 ide_hwif_t *hwif = HWIF(drive); 423 struct request *rq; 424 struct request_pm_state rqpm; 425 ide_task_t args; 426 int ret; 427 428 /* Call ACPI _GTM only once */ 429 if (!(drive->dn % 2)) 430 ide_acpi_get_timing(hwif); 431 432 memset(&rqpm, 0, sizeof(rqpm)); 433 memset(&args, 0, sizeof(args)); 434 rq = blk_get_request(drive->queue, READ, __GFP_WAIT); 435 rq->cmd_type = REQ_TYPE_PM_SUSPEND; 436 rq->special = &args; 437 rq->data = &rqpm; 438 rqpm.pm_step = ide_pm_state_start_suspend; 439 if (mesg.event == PM_EVENT_PRETHAW) 440 mesg.event = PM_EVENT_FREEZE; 441 rqpm.pm_state = mesg.event; 442 443 ret = blk_execute_rq(drive->queue, NULL, rq, 0); 444 blk_put_request(rq); 445 /* only call ACPI _PS3 after both drivers are suspended */ 446 if (!ret && (((drive->dn % 2) && hwif->drives[0].present 447 && hwif->drives[1].present) 448 || !hwif->drives[0].present 449 || !hwif->drives[1].present)) 450 ide_acpi_set_state(hwif, 0); 451 return ret; 452} 453 454static int generic_ide_resume(struct device *dev) 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 err; 462 463 /* Call ACPI _STM only once */ 464 if (!(drive->dn % 2)) { 465 ide_acpi_set_state(hwif, 1); 466 ide_acpi_push_timing(hwif); 467 } 468 469 ide_acpi_exec_tfs(drive); 470 471 memset(&rqpm, 0, sizeof(rqpm)); 472 memset(&args, 0, sizeof(args)); 473 rq = blk_get_request(drive->queue, READ, __GFP_WAIT); 474 rq->cmd_type = REQ_TYPE_PM_RESUME; 475 rq->cmd_flags |= REQ_PREEMPT; 476 rq->special = &args; 477 rq->data = &rqpm; 478 rqpm.pm_step = ide_pm_state_start_resume; 479 rqpm.pm_state = PM_EVENT_ON; 480 481 err = blk_execute_rq(drive->queue, NULL, rq, 1); 482 blk_put_request(rq); 483 484 if (err == 0 && dev->driver) { 485 ide_driver_t *drv = to_ide_driver(dev->driver); 486 487 if (drv->resume) 488 drv->resume(drive); 489 } 490 491 return err; 492} 493 494static int generic_drive_reset(ide_drive_t *drive) 495{ 496 struct request *rq; 497 int ret = 0; 498 499 rq = blk_get_request(drive->queue, READ, __GFP_WAIT); 500 rq->cmd_type = REQ_TYPE_SPECIAL; 501 rq->cmd_len = 1; 502 rq->cmd[0] = REQ_DRIVE_RESET; 503 rq->cmd_flags |= REQ_SOFTBARRIER; 504 if (blk_execute_rq(drive->queue, NULL, rq, 1)) 505 ret = rq->errors; 506 blk_put_request(rq); 507 return ret; 508} 509 510static int ide_get_identity_ioctl(ide_drive_t *drive, unsigned int cmd, 511 unsigned long arg) 512{ 513 u16 *id = NULL; 514 int size = (cmd == HDIO_GET_IDENTITY) ? (ATA_ID_WORDS * 2) : 142; 515 int rc = 0; 516 517 if (drive->id_read == 0) { 518 rc = -ENOMSG; 519 goto out; 520 } 521 522 id = kmalloc(size, GFP_KERNEL); 523 if (id == NULL) { 524 rc = -ENOMEM; 525 goto out; 526 } 527 528 memcpy(id, drive->id, size); 529 ata_id_to_hd_driveid(id); 530 531 if (copy_to_user((void __user *)arg, id, size)) 532 rc = -EFAULT; 533 534 kfree(id); 535out: 536 return rc; 537} 538 539static int ide_get_nice_ioctl(ide_drive_t *drive, unsigned long arg) 540{ 541 return put_user((drive->dsc_overlap << IDE_NICE_DSC_OVERLAP) | 542 (drive->nice1 << IDE_NICE_1), (long __user *)arg); 543} 544 545static int ide_set_nice_ioctl(ide_drive_t *drive, unsigned long arg) 546{ 547 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1)))) 548 return -EPERM; 549 550 if (((arg >> IDE_NICE_DSC_OVERLAP) & 1) && 551 (drive->media == ide_disk || drive->media == ide_floppy || 552 drive->scsi)) 553 return -EPERM; 554 555 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1; 556 drive->nice1 = (arg >> IDE_NICE_1) & 1; 557 558 return 0; 559} 560 561int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev, 562 unsigned int cmd, unsigned long arg) 563{ 564 unsigned long flags; 565 int err = 0, (*getfunc)(ide_drive_t *), (*setfunc)(ide_drive_t *, int); 566 567 switch (cmd) { 568 case HDIO_GET_32BIT: getfunc = get_io_32bit; goto read_val; 569 case HDIO_GET_KEEPSETTINGS: getfunc = get_ksettings; goto read_val; 570 case HDIO_GET_UNMASKINTR: getfunc = get_unmaskirq; goto read_val; 571 case HDIO_GET_DMA: getfunc = get_using_dma; goto read_val; 572 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val; 573 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val; 574 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val; 575 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val; 576 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val; 577 } 578 579 switch (cmd) { 580 case HDIO_OBSOLETE_IDENTITY: 581 case HDIO_GET_IDENTITY: 582 if (bdev != bdev->bd_contains) 583 return -EINVAL; 584 return ide_get_identity_ioctl(drive, cmd, arg); 585 case HDIO_GET_NICE: 586 return ide_get_nice_ioctl(drive, arg); 587#ifdef CONFIG_IDE_TASK_IOCTL 588 case HDIO_DRIVE_TASKFILE: 589 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 590 return -EACCES; 591 switch(drive->media) { 592 case ide_disk: 593 return ide_taskfile_ioctl(drive, cmd, arg); 594 default: 595 return -ENOMSG; 596 } 597#endif /* CONFIG_IDE_TASK_IOCTL */ 598 599 case HDIO_DRIVE_CMD: 600 if (!capable(CAP_SYS_RAWIO)) 601 return -EACCES; 602 return ide_cmd_ioctl(drive, cmd, arg); 603 604 case HDIO_DRIVE_TASK: 605 if (!capable(CAP_SYS_RAWIO)) 606 return -EACCES; 607 return ide_task_ioctl(drive, cmd, arg); 608 case HDIO_SET_NICE: 609 if (!capable(CAP_SYS_ADMIN)) 610 return -EACCES; 611 return ide_set_nice_ioctl(drive, arg); 612 case HDIO_DRIVE_RESET: 613 if (!capable(CAP_SYS_ADMIN)) 614 return -EACCES; 615 616 return generic_drive_reset(drive); 617 618 case HDIO_GET_BUSSTATE: 619 if (!capable(CAP_SYS_ADMIN)) 620 return -EACCES; 621 if (put_user(BUSSTATE_ON, (long __user *)arg)) 622 return -EFAULT; 623 return 0; 624 625 case HDIO_SET_BUSSTATE: 626 if (!capable(CAP_SYS_ADMIN)) 627 return -EACCES; 628 return -EOPNOTSUPP; 629 default: 630 return -EINVAL; 631 } 632 633read_val: 634 mutex_lock(&ide_setting_mtx); 635 spin_lock_irqsave(&ide_lock, flags); 636 err = getfunc(drive); 637 spin_unlock_irqrestore(&ide_lock, flags); 638 mutex_unlock(&ide_setting_mtx); 639 return err >= 0 ? put_user(err, (long __user *)arg) : err; 640 641set_val: 642 if (bdev != bdev->bd_contains) 643 err = -EINVAL; 644 else { 645 if (!capable(CAP_SYS_ADMIN)) 646 err = -EACCES; 647 else { 648 mutex_lock(&ide_setting_mtx); 649 err = setfunc(drive, arg); 650 mutex_unlock(&ide_setting_mtx); 651 } 652 } 653 return err; 654} 655 656EXPORT_SYMBOL(generic_ide_ioctl); 657 658/** 659 * ide_device_get - get an additional reference to a ide_drive_t 660 * @drive: device to get a reference to 661 * 662 * Gets a reference to the ide_drive_t and increments the use count of the 663 * underlying LLDD module. 664 */ 665int ide_device_get(ide_drive_t *drive) 666{ 667 struct device *host_dev; 668 struct module *module; 669 670 if (!get_device(&drive->gendev)) 671 return -ENXIO; 672 673 host_dev = drive->hwif->host->dev[0]; 674 module = host_dev ? host_dev->driver->owner : NULL; 675 676 if (module && !try_module_get(module)) { 677 put_device(&drive->gendev); 678 return -ENXIO; 679 } 680 681 return 0; 682} 683EXPORT_SYMBOL_GPL(ide_device_get); 684 685/** 686 * ide_device_put - release a reference to a ide_drive_t 687 * @drive: device to release a reference on 688 * 689 * Release a reference to the ide_drive_t and decrements the use count of 690 * the underlying LLDD module. 691 */ 692void ide_device_put(ide_drive_t *drive) 693{ 694#ifdef CONFIG_MODULE_UNLOAD 695 struct device *host_dev = drive->hwif->host->dev[0]; 696 struct module *module = host_dev ? host_dev->driver->owner : NULL; 697 698 if (module) 699 module_put(module); 700#endif 701 put_device(&drive->gendev); 702} 703EXPORT_SYMBOL_GPL(ide_device_put); 704 705static int ide_bus_match(struct device *dev, struct device_driver *drv) 706{ 707 return 1; 708} 709 710static char *media_string(ide_drive_t *drive) 711{ 712 switch (drive->media) { 713 case ide_disk: 714 return "disk"; 715 case ide_cdrom: 716 return "cdrom"; 717 case ide_tape: 718 return "tape"; 719 case ide_floppy: 720 return "floppy"; 721 case ide_optical: 722 return "optical"; 723 default: 724 return "UNKNOWN"; 725 } 726} 727 728static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf) 729{ 730 ide_drive_t *drive = to_ide_device(dev); 731 return sprintf(buf, "%s\n", media_string(drive)); 732} 733 734static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf) 735{ 736 ide_drive_t *drive = to_ide_device(dev); 737 return sprintf(buf, "%s\n", drive->name); 738} 739 740static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 741{ 742 ide_drive_t *drive = to_ide_device(dev); 743 return sprintf(buf, "ide:m-%s\n", media_string(drive)); 744} 745 746static ssize_t model_show(struct device *dev, struct device_attribute *attr, 747 char *buf) 748{ 749 ide_drive_t *drive = to_ide_device(dev); 750 return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_PROD]); 751} 752 753static ssize_t firmware_show(struct device *dev, struct device_attribute *attr, 754 char *buf) 755{ 756 ide_drive_t *drive = to_ide_device(dev); 757 return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_FW_REV]); 758} 759 760static ssize_t serial_show(struct device *dev, struct device_attribute *attr, 761 char *buf) 762{ 763 ide_drive_t *drive = to_ide_device(dev); 764 return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_SERNO]); 765} 766 767static struct device_attribute ide_dev_attrs[] = { 768 __ATTR_RO(media), 769 __ATTR_RO(drivename), 770 __ATTR_RO(modalias), 771 __ATTR_RO(model), 772 __ATTR_RO(firmware), 773 __ATTR(serial, 0400, serial_show, NULL), 774 __ATTR_NULL 775}; 776 777static int ide_uevent(struct device *dev, struct kobj_uevent_env *env) 778{ 779 ide_drive_t *drive = to_ide_device(dev); 780 781 add_uevent_var(env, "MEDIA=%s", media_string(drive)); 782 add_uevent_var(env, "DRIVENAME=%s", drive->name); 783 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive)); 784 return 0; 785} 786 787static int generic_ide_probe(struct device *dev) 788{ 789 ide_drive_t *drive = to_ide_device(dev); 790 ide_driver_t *drv = to_ide_driver(dev->driver); 791 792 return drv->probe ? drv->probe(drive) : -ENODEV; 793} 794 795static int generic_ide_remove(struct device *dev) 796{ 797 ide_drive_t *drive = to_ide_device(dev); 798 ide_driver_t *drv = to_ide_driver(dev->driver); 799 800 if (drv->remove) 801 drv->remove(drive); 802 803 return 0; 804} 805 806static void generic_ide_shutdown(struct device *dev) 807{ 808 ide_drive_t *drive = to_ide_device(dev); 809 ide_driver_t *drv = to_ide_driver(dev->driver); 810 811 if (dev->driver && drv->shutdown) 812 drv->shutdown(drive); 813} 814 815struct bus_type ide_bus_type = { 816 .name = "ide", 817 .match = ide_bus_match, 818 .uevent = ide_uevent, 819 .probe = generic_ide_probe, 820 .remove = generic_ide_remove, 821 .shutdown = generic_ide_shutdown, 822 .dev_attrs = ide_dev_attrs, 823 .suspend = generic_ide_suspend, 824 .resume = generic_ide_resume, 825}; 826 827EXPORT_SYMBOL_GPL(ide_bus_type); 828 829int ide_vlb_clk; 830EXPORT_SYMBOL_GPL(ide_vlb_clk); 831 832module_param_named(vlb_clock, ide_vlb_clk, int, 0); 833MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)"); 834 835int ide_pci_clk; 836EXPORT_SYMBOL_GPL(ide_pci_clk); 837 838module_param_named(pci_clock, ide_pci_clk, int, 0); 839MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)"); 840 841static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp) 842{ 843 int a, b, i, j = 1; 844 unsigned int *dev_param_mask = (unsigned int *)kp->arg; 845 846 if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 && 847 sscanf(s, "%d.%d", &a, &b) != 2) 848 return -EINVAL; 849 850 i = a * MAX_DRIVES + b; 851 852 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) 853 return -EINVAL; 854 855 if (j) 856 *dev_param_mask |= (1 << i); 857 else 858 *dev_param_mask &= (1 << i); 859 860 return 0; 861} 862 863static unsigned int ide_nodma; 864 865module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0); 866MODULE_PARM_DESC(nodma, "disallow DMA for a device"); 867 868static unsigned int ide_noflush; 869 870module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0); 871MODULE_PARM_DESC(noflush, "disable flush requests for a device"); 872 873static unsigned int ide_noprobe; 874 875module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0); 876MODULE_PARM_DESC(noprobe, "skip probing for a device"); 877 878static unsigned int ide_nowerr; 879 880module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0); 881MODULE_PARM_DESC(nowerr, "ignore the ATA_DF bit for a device"); 882 883static unsigned int ide_cdroms; 884 885module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0); 886MODULE_PARM_DESC(cdrom, "force device as a CD-ROM"); 887 888struct chs_geom { 889 unsigned int cyl; 890 u8 head; 891 u8 sect; 892}; 893 894static unsigned int ide_disks; 895static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES]; 896 897static int ide_set_disk_chs(const char *str, struct kernel_param *kp) 898{ 899 int a, b, c = 0, h = 0, s = 0, i, j = 1; 900 901 if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 && 902 sscanf(str, "%d.%d:%d", &a, &b, &j) != 3) 903 return -EINVAL; 904 905 i = a * MAX_DRIVES + b; 906 907 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) 908 return -EINVAL; 909 910 if (c > INT_MAX || h > 255 || s > 255) 911 return -EINVAL; 912 913 if (j) 914 ide_disks |= (1 << i); 915 else 916 ide_disks &= (1 << i); 917 918 ide_disks_chs[i].cyl = c; 919 ide_disks_chs[i].head = h; 920 ide_disks_chs[i].sect = s; 921 922 return 0; 923} 924 925module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0); 926MODULE_PARM_DESC(chs, "force device as a disk (using CHS)"); 927 928static void ide_dev_apply_params(ide_drive_t *drive) 929{ 930 int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit; 931 932 if (ide_nodma & (1 << i)) { 933 printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name); 934 drive->nodma = 1; 935 } 936 if (ide_noflush & (1 << i)) { 937 printk(KERN_INFO "ide: disabling flush requests for %s\n", 938 drive->name); 939 drive->noflush = 1; 940 } 941 if (ide_noprobe & (1 << i)) { 942 printk(KERN_INFO "ide: skipping probe for %s\n", drive->name); 943 drive->noprobe = 1; 944 } 945 if (ide_nowerr & (1 << i)) { 946 printk(KERN_INFO "ide: ignoring the ATA_DF bit for %s\n", 947 drive->name); 948 drive->bad_wstat = BAD_R_STAT; 949 } 950 if (ide_cdroms & (1 << i)) { 951 printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name); 952 drive->present = 1; 953 drive->media = ide_cdrom; 954 /* an ATAPI device ignores DRDY */ 955 drive->ready_stat = 0; 956 } 957 if (ide_disks & (1 << i)) { 958 drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl; 959 drive->head = drive->bios_head = ide_disks_chs[i].head; 960 drive->sect = drive->bios_sect = ide_disks_chs[i].sect; 961 drive->forced_geom = 1; 962 printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n", 963 drive->name, 964 drive->cyl, drive->head, drive->sect); 965 drive->present = 1; 966 drive->media = ide_disk; 967 drive->ready_stat = ATA_DRDY; 968 } 969} 970 971static unsigned int ide_ignore_cable; 972 973static int ide_set_ignore_cable(const char *s, struct kernel_param *kp) 974{ 975 int i, j = 1; 976 977 if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1) 978 return -EINVAL; 979 980 if (i >= MAX_HWIFS || j < 0 || j > 1) 981 return -EINVAL; 982 983 if (j) 984 ide_ignore_cable |= (1 << i); 985 else 986 ide_ignore_cable &= (1 << i); 987 988 return 0; 989} 990 991module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0); 992MODULE_PARM_DESC(ignore_cable, "ignore cable detection"); 993 994void ide_port_apply_params(ide_hwif_t *hwif) 995{ 996 int i; 997 998 if (ide_ignore_cable & (1 << hwif->index)) { 999 printk(KERN_INFO "ide: ignoring cable detection for %s\n", 1000 hwif->name); 1001 hwif->cbl = ATA_CBL_PATA40_SHORT; 1002 } 1003 1004 for (i = 0; i < MAX_DRIVES; i++) 1005 ide_dev_apply_params(&hwif->drives[i]); 1006} 1007 1008/* 1009 * This is gets invoked once during initialization, to set *everything* up 1010 */ 1011static int __init ide_init(void) 1012{ 1013 int ret; 1014 1015 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n"); 1016 1017 ret = bus_register(&ide_bus_type); 1018 if (ret < 0) { 1019 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret); 1020 return ret; 1021 } 1022 1023 ide_port_class = class_create(THIS_MODULE, "ide_port"); 1024 if (IS_ERR(ide_port_class)) { 1025 ret = PTR_ERR(ide_port_class); 1026 goto out_port_class; 1027 } 1028 1029 proc_ide_create(); 1030 1031 return 0; 1032 1033out_port_class: 1034 bus_unregister(&ide_bus_type); 1035 1036 return ret; 1037} 1038 1039static void __exit ide_exit(void) 1040{ 1041 proc_ide_destroy(); 1042 1043 class_destroy(ide_port_class); 1044 1045 bus_unregister(&ide_bus_type); 1046} 1047 1048module_init(ide_init); 1049module_exit(ide_exit); 1050 1051MODULE_LICENSE("GPL"); 1052