ide.c revision 05236ea6df7419f0f37cf9603cfee265cfce5832
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); 252 253/** 254 * ide_spin_wait_hwgroup - wait for group 255 * @drive: drive in the group 256 * 257 * Wait for an IDE device group to go non busy and then return 258 * holding the ide_lock which guards the hwgroup->busy status 259 * and right to use it. 260 */ 261 262int ide_spin_wait_hwgroup (ide_drive_t *drive) 263{ 264 ide_hwgroup_t *hwgroup = HWGROUP(drive); 265 unsigned long timeout = jiffies + (3 * HZ); 266 267 spin_lock_irq(&ide_lock); 268 269 while (hwgroup->busy) { 270 unsigned long lflags; 271 spin_unlock_irq(&ide_lock); 272 local_irq_set(lflags); 273 if (time_after(jiffies, timeout)) { 274 local_irq_restore(lflags); 275 printk(KERN_ERR "%s: channel busy\n", drive->name); 276 return -EBUSY; 277 } 278 local_irq_restore(lflags); 279 spin_lock_irq(&ide_lock); 280 } 281 return 0; 282} 283 284EXPORT_SYMBOL(ide_spin_wait_hwgroup); 285 286ide_devset_get(io_32bit, io_32bit); 287 288int set_io_32bit(ide_drive_t *drive, int arg) 289{ 290 if (drive->no_io_32bit) 291 return -EPERM; 292 293 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1)) 294 return -EINVAL; 295 296 if (ide_spin_wait_hwgroup(drive)) 297 return -EBUSY; 298 299 drive->io_32bit = arg; 300 301 spin_unlock_irq(&ide_lock); 302 303 return 0; 304} 305 306ide_devset_get(ksettings, keep_settings); 307 308int set_ksettings(ide_drive_t *drive, int arg) 309{ 310 if (arg < 0 || arg > 1) 311 return -EINVAL; 312 313 if (ide_spin_wait_hwgroup(drive)) 314 return -EBUSY; 315 drive->keep_settings = arg; 316 spin_unlock_irq(&ide_lock); 317 318 return 0; 319} 320 321ide_devset_get(using_dma, using_dma); 322 323int set_using_dma(ide_drive_t *drive, int arg) 324{ 325#ifdef CONFIG_BLK_DEV_IDEDMA 326 ide_hwif_t *hwif = drive->hwif; 327 int err = -EPERM; 328 329 if (arg < 0 || arg > 1) 330 return -EINVAL; 331 332 if (ata_id_has_dma(drive->id) == 0) 333 goto out; 334 335 if (hwif->dma_ops == NULL) 336 goto out; 337 338 err = -EBUSY; 339 if (ide_spin_wait_hwgroup(drive)) 340 goto out; 341 /* 342 * set ->busy flag, unlock and let it ride 343 */ 344 hwif->hwgroup->busy = 1; 345 spin_unlock_irq(&ide_lock); 346 347 err = 0; 348 349 if (arg) { 350 if (ide_set_dma(drive)) 351 err = -EIO; 352 } else 353 ide_dma_off(drive); 354 355 /* 356 * lock, clear ->busy flag and unlock before leaving 357 */ 358 spin_lock_irq(&ide_lock); 359 hwif->hwgroup->busy = 0; 360 spin_unlock_irq(&ide_lock); 361out: 362 return err; 363#else 364 if (arg < 0 || arg > 1) 365 return -EINVAL; 366 367 return -EPERM; 368#endif 369} 370 371int set_pio_mode(ide_drive_t *drive, int arg) 372{ 373 struct request *rq; 374 ide_hwif_t *hwif = drive->hwif; 375 const struct ide_port_ops *port_ops = hwif->port_ops; 376 377 if (arg < 0 || arg > 255) 378 return -EINVAL; 379 380 if (port_ops == NULL || port_ops->set_pio_mode == NULL || 381 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)) 382 return -ENOSYS; 383 384 if (drive->special.b.set_tune) 385 return -EBUSY; 386 387 rq = blk_get_request(drive->queue, READ, __GFP_WAIT); 388 rq->cmd_type = REQ_TYPE_ATA_TASKFILE; 389 390 drive->tune_req = (u8) arg; 391 drive->special.b.set_tune = 1; 392 393 blk_execute_rq(drive->queue, NULL, rq, 0); 394 blk_put_request(rq); 395 396 return 0; 397} 398 399ide_devset_get(unmaskirq, unmask); 400 401int set_unmaskirq(ide_drive_t *drive, int arg) 402{ 403 if (drive->no_unmask) 404 return -EPERM; 405 406 if (arg < 0 || arg > 1) 407 return -EINVAL; 408 409 if (ide_spin_wait_hwgroup(drive)) 410 return -EBUSY; 411 drive->unmask = arg; 412 spin_unlock_irq(&ide_lock); 413 414 return 0; 415} 416 417static int generic_ide_suspend(struct device *dev, pm_message_t mesg) 418{ 419 ide_drive_t *drive = dev->driver_data; 420 ide_hwif_t *hwif = HWIF(drive); 421 struct request *rq; 422 struct request_pm_state rqpm; 423 ide_task_t args; 424 int ret; 425 426 /* Call ACPI _GTM only once */ 427 if (!(drive->dn % 2)) 428 ide_acpi_get_timing(hwif); 429 430 memset(&rqpm, 0, sizeof(rqpm)); 431 memset(&args, 0, sizeof(args)); 432 rq = blk_get_request(drive->queue, READ, __GFP_WAIT); 433 rq->cmd_type = REQ_TYPE_PM_SUSPEND; 434 rq->special = &args; 435 rq->data = &rqpm; 436 rqpm.pm_step = ide_pm_state_start_suspend; 437 if (mesg.event == PM_EVENT_PRETHAW) 438 mesg.event = PM_EVENT_FREEZE; 439 rqpm.pm_state = mesg.event; 440 441 ret = blk_execute_rq(drive->queue, NULL, rq, 0); 442 blk_put_request(rq); 443 /* only call ACPI _PS3 after both drivers are suspended */ 444 if (!ret && (((drive->dn % 2) && hwif->drives[0].present 445 && hwif->drives[1].present) 446 || !hwif->drives[0].present 447 || !hwif->drives[1].present)) 448 ide_acpi_set_state(hwif, 0); 449 return ret; 450} 451 452static int generic_ide_resume(struct device *dev) 453{ 454 ide_drive_t *drive = dev->driver_data; 455 ide_hwif_t *hwif = HWIF(drive); 456 struct request *rq; 457 struct request_pm_state rqpm; 458 ide_task_t args; 459 int err; 460 461 /* Call ACPI _STM only once */ 462 if (!(drive->dn % 2)) { 463 ide_acpi_set_state(hwif, 1); 464 ide_acpi_push_timing(hwif); 465 } 466 467 ide_acpi_exec_tfs(drive); 468 469 memset(&rqpm, 0, sizeof(rqpm)); 470 memset(&args, 0, sizeof(args)); 471 rq = blk_get_request(drive->queue, READ, __GFP_WAIT); 472 rq->cmd_type = REQ_TYPE_PM_RESUME; 473 rq->cmd_flags |= REQ_PREEMPT; 474 rq->special = &args; 475 rq->data = &rqpm; 476 rqpm.pm_step = ide_pm_state_start_resume; 477 rqpm.pm_state = PM_EVENT_ON; 478 479 err = blk_execute_rq(drive->queue, NULL, rq, 1); 480 blk_put_request(rq); 481 482 if (err == 0 && dev->driver) { 483 ide_driver_t *drv = to_ide_driver(dev->driver); 484 485 if (drv->resume) 486 drv->resume(drive); 487 } 488 489 return err; 490} 491 492/** 493 * ide_device_get - get an additional reference to a ide_drive_t 494 * @drive: device to get a reference to 495 * 496 * Gets a reference to the ide_drive_t and increments the use count of the 497 * underlying LLDD module. 498 */ 499int ide_device_get(ide_drive_t *drive) 500{ 501 struct device *host_dev; 502 struct module *module; 503 504 if (!get_device(&drive->gendev)) 505 return -ENXIO; 506 507 host_dev = drive->hwif->host->dev[0]; 508 module = host_dev ? host_dev->driver->owner : NULL; 509 510 if (module && !try_module_get(module)) { 511 put_device(&drive->gendev); 512 return -ENXIO; 513 } 514 515 return 0; 516} 517EXPORT_SYMBOL_GPL(ide_device_get); 518 519/** 520 * ide_device_put - release a reference to a ide_drive_t 521 * @drive: device to release a reference on 522 * 523 * Release a reference to the ide_drive_t and decrements the use count of 524 * the underlying LLDD module. 525 */ 526void ide_device_put(ide_drive_t *drive) 527{ 528#ifdef CONFIG_MODULE_UNLOAD 529 struct device *host_dev = drive->hwif->host->dev[0]; 530 struct module *module = host_dev ? host_dev->driver->owner : NULL; 531 532 if (module) 533 module_put(module); 534#endif 535 put_device(&drive->gendev); 536} 537EXPORT_SYMBOL_GPL(ide_device_put); 538 539static int ide_bus_match(struct device *dev, struct device_driver *drv) 540{ 541 return 1; 542} 543 544static char *media_string(ide_drive_t *drive) 545{ 546 switch (drive->media) { 547 case ide_disk: 548 return "disk"; 549 case ide_cdrom: 550 return "cdrom"; 551 case ide_tape: 552 return "tape"; 553 case ide_floppy: 554 return "floppy"; 555 case ide_optical: 556 return "optical"; 557 default: 558 return "UNKNOWN"; 559 } 560} 561 562static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf) 563{ 564 ide_drive_t *drive = to_ide_device(dev); 565 return sprintf(buf, "%s\n", media_string(drive)); 566} 567 568static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf) 569{ 570 ide_drive_t *drive = to_ide_device(dev); 571 return sprintf(buf, "%s\n", drive->name); 572} 573 574static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 575{ 576 ide_drive_t *drive = to_ide_device(dev); 577 return sprintf(buf, "ide:m-%s\n", media_string(drive)); 578} 579 580static ssize_t model_show(struct device *dev, struct device_attribute *attr, 581 char *buf) 582{ 583 ide_drive_t *drive = to_ide_device(dev); 584 return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_PROD]); 585} 586 587static ssize_t firmware_show(struct device *dev, struct device_attribute *attr, 588 char *buf) 589{ 590 ide_drive_t *drive = to_ide_device(dev); 591 return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_FW_REV]); 592} 593 594static ssize_t serial_show(struct device *dev, struct device_attribute *attr, 595 char *buf) 596{ 597 ide_drive_t *drive = to_ide_device(dev); 598 return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_SERNO]); 599} 600 601static struct device_attribute ide_dev_attrs[] = { 602 __ATTR_RO(media), 603 __ATTR_RO(drivename), 604 __ATTR_RO(modalias), 605 __ATTR_RO(model), 606 __ATTR_RO(firmware), 607 __ATTR(serial, 0400, serial_show, NULL), 608 __ATTR_NULL 609}; 610 611static int ide_uevent(struct device *dev, struct kobj_uevent_env *env) 612{ 613 ide_drive_t *drive = to_ide_device(dev); 614 615 add_uevent_var(env, "MEDIA=%s", media_string(drive)); 616 add_uevent_var(env, "DRIVENAME=%s", drive->name); 617 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive)); 618 return 0; 619} 620 621static int generic_ide_probe(struct device *dev) 622{ 623 ide_drive_t *drive = to_ide_device(dev); 624 ide_driver_t *drv = to_ide_driver(dev->driver); 625 626 return drv->probe ? drv->probe(drive) : -ENODEV; 627} 628 629static int generic_ide_remove(struct device *dev) 630{ 631 ide_drive_t *drive = to_ide_device(dev); 632 ide_driver_t *drv = to_ide_driver(dev->driver); 633 634 if (drv->remove) 635 drv->remove(drive); 636 637 return 0; 638} 639 640static void generic_ide_shutdown(struct device *dev) 641{ 642 ide_drive_t *drive = to_ide_device(dev); 643 ide_driver_t *drv = to_ide_driver(dev->driver); 644 645 if (dev->driver && drv->shutdown) 646 drv->shutdown(drive); 647} 648 649struct bus_type ide_bus_type = { 650 .name = "ide", 651 .match = ide_bus_match, 652 .uevent = ide_uevent, 653 .probe = generic_ide_probe, 654 .remove = generic_ide_remove, 655 .shutdown = generic_ide_shutdown, 656 .dev_attrs = ide_dev_attrs, 657 .suspend = generic_ide_suspend, 658 .resume = generic_ide_resume, 659}; 660 661EXPORT_SYMBOL_GPL(ide_bus_type); 662 663int ide_vlb_clk; 664EXPORT_SYMBOL_GPL(ide_vlb_clk); 665 666module_param_named(vlb_clock, ide_vlb_clk, int, 0); 667MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)"); 668 669int ide_pci_clk; 670EXPORT_SYMBOL_GPL(ide_pci_clk); 671 672module_param_named(pci_clock, ide_pci_clk, int, 0); 673MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)"); 674 675static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp) 676{ 677 int a, b, i, j = 1; 678 unsigned int *dev_param_mask = (unsigned int *)kp->arg; 679 680 if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 && 681 sscanf(s, "%d.%d", &a, &b) != 2) 682 return -EINVAL; 683 684 i = a * MAX_DRIVES + b; 685 686 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) 687 return -EINVAL; 688 689 if (j) 690 *dev_param_mask |= (1 << i); 691 else 692 *dev_param_mask &= (1 << i); 693 694 return 0; 695} 696 697static unsigned int ide_nodma; 698 699module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0); 700MODULE_PARM_DESC(nodma, "disallow DMA for a device"); 701 702static unsigned int ide_noflush; 703 704module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0); 705MODULE_PARM_DESC(noflush, "disable flush requests for a device"); 706 707static unsigned int ide_noprobe; 708 709module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0); 710MODULE_PARM_DESC(noprobe, "skip probing for a device"); 711 712static unsigned int ide_nowerr; 713 714module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0); 715MODULE_PARM_DESC(nowerr, "ignore the ATA_DF bit for a device"); 716 717static unsigned int ide_cdroms; 718 719module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0); 720MODULE_PARM_DESC(cdrom, "force device as a CD-ROM"); 721 722struct chs_geom { 723 unsigned int cyl; 724 u8 head; 725 u8 sect; 726}; 727 728static unsigned int ide_disks; 729static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES]; 730 731static int ide_set_disk_chs(const char *str, struct kernel_param *kp) 732{ 733 int a, b, c = 0, h = 0, s = 0, i, j = 1; 734 735 if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 && 736 sscanf(str, "%d.%d:%d", &a, &b, &j) != 3) 737 return -EINVAL; 738 739 i = a * MAX_DRIVES + b; 740 741 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) 742 return -EINVAL; 743 744 if (c > INT_MAX || h > 255 || s > 255) 745 return -EINVAL; 746 747 if (j) 748 ide_disks |= (1 << i); 749 else 750 ide_disks &= (1 << i); 751 752 ide_disks_chs[i].cyl = c; 753 ide_disks_chs[i].head = h; 754 ide_disks_chs[i].sect = s; 755 756 return 0; 757} 758 759module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0); 760MODULE_PARM_DESC(chs, "force device as a disk (using CHS)"); 761 762static void ide_dev_apply_params(ide_drive_t *drive) 763{ 764 int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit; 765 766 if (ide_nodma & (1 << i)) { 767 printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name); 768 drive->nodma = 1; 769 } 770 if (ide_noflush & (1 << i)) { 771 printk(KERN_INFO "ide: disabling flush requests for %s\n", 772 drive->name); 773 drive->noflush = 1; 774 } 775 if (ide_noprobe & (1 << i)) { 776 printk(KERN_INFO "ide: skipping probe for %s\n", drive->name); 777 drive->noprobe = 1; 778 } 779 if (ide_nowerr & (1 << i)) { 780 printk(KERN_INFO "ide: ignoring the ATA_DF bit for %s\n", 781 drive->name); 782 drive->bad_wstat = BAD_R_STAT; 783 } 784 if (ide_cdroms & (1 << i)) { 785 printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name); 786 drive->present = 1; 787 drive->media = ide_cdrom; 788 /* an ATAPI device ignores DRDY */ 789 drive->ready_stat = 0; 790 } 791 if (ide_disks & (1 << i)) { 792 drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl; 793 drive->head = drive->bios_head = ide_disks_chs[i].head; 794 drive->sect = drive->bios_sect = ide_disks_chs[i].sect; 795 drive->forced_geom = 1; 796 printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n", 797 drive->name, 798 drive->cyl, drive->head, drive->sect); 799 drive->present = 1; 800 drive->media = ide_disk; 801 drive->ready_stat = ATA_DRDY; 802 } 803} 804 805static unsigned int ide_ignore_cable; 806 807static int ide_set_ignore_cable(const char *s, struct kernel_param *kp) 808{ 809 int i, j = 1; 810 811 if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1) 812 return -EINVAL; 813 814 if (i >= MAX_HWIFS || j < 0 || j > 1) 815 return -EINVAL; 816 817 if (j) 818 ide_ignore_cable |= (1 << i); 819 else 820 ide_ignore_cable &= (1 << i); 821 822 return 0; 823} 824 825module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0); 826MODULE_PARM_DESC(ignore_cable, "ignore cable detection"); 827 828void ide_port_apply_params(ide_hwif_t *hwif) 829{ 830 int i; 831 832 if (ide_ignore_cable & (1 << hwif->index)) { 833 printk(KERN_INFO "ide: ignoring cable detection for %s\n", 834 hwif->name); 835 hwif->cbl = ATA_CBL_PATA40_SHORT; 836 } 837 838 for (i = 0; i < MAX_DRIVES; i++) 839 ide_dev_apply_params(&hwif->drives[i]); 840} 841 842/* 843 * This is gets invoked once during initialization, to set *everything* up 844 */ 845static int __init ide_init(void) 846{ 847 int ret; 848 849 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n"); 850 851 ret = bus_register(&ide_bus_type); 852 if (ret < 0) { 853 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret); 854 return ret; 855 } 856 857 ide_port_class = class_create(THIS_MODULE, "ide_port"); 858 if (IS_ERR(ide_port_class)) { 859 ret = PTR_ERR(ide_port_class); 860 goto out_port_class; 861 } 862 863 proc_ide_create(); 864 865 return 0; 866 867out_port_class: 868 bus_unregister(&ide_bus_type); 869 870 return ret; 871} 872 873static void __exit ide_exit(void) 874{ 875 proc_ide_destroy(); 876 877 class_destroy(ide_port_class); 878 879 bus_unregister(&ide_bus_type); 880} 881 882module_init(ide_init); 883module_exit(ide_exit); 884 885MODULE_LICENSE("GPL"); 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