ide-probe.c revision 7ed5b157d9dff55bf477b4c8b4708d5d45476677
1/* 2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) 3 * Copyright (C) 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 IDE probe module, as evolved from hd.c and ide.c. 14 * 15 * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot 16 * by Andrea Arcangeli 17 */ 18 19#include <linux/module.h> 20#include <linux/types.h> 21#include <linux/string.h> 22#include <linux/kernel.h> 23#include <linux/timer.h> 24#include <linux/mm.h> 25#include <linux/interrupt.h> 26#include <linux/major.h> 27#include <linux/errno.h> 28#include <linux/genhd.h> 29#include <linux/slab.h> 30#include <linux/delay.h> 31#include <linux/ide.h> 32#include <linux/spinlock.h> 33#include <linux/kmod.h> 34#include <linux/pci.h> 35#include <linux/scatterlist.h> 36 37#include <asm/byteorder.h> 38#include <asm/irq.h> 39#include <asm/uaccess.h> 40#include <asm/io.h> 41 42/** 43 * generic_id - add a generic drive id 44 * @drive: drive to make an ID block for 45 * 46 * Add a fake id field to the drive we are passed. This allows 47 * use to skip a ton of NULL checks (which people always miss) 48 * and make drive properties unconditional outside of this file 49 */ 50 51static void generic_id(ide_drive_t *drive) 52{ 53 u16 *id = drive->id; 54 55 id[ATA_ID_CUR_CYLS] = id[ATA_ID_CYLS] = drive->cyl; 56 id[ATA_ID_CUR_HEADS] = id[ATA_ID_HEADS] = drive->head; 57 id[ATA_ID_CUR_SECTORS] = id[ATA_ID_SECTORS] = drive->sect; 58} 59 60static void ide_disk_init_chs(ide_drive_t *drive) 61{ 62 u16 *id = drive->id; 63 64 /* Extract geometry if we did not already have one for the drive */ 65 if (!drive->cyl || !drive->head || !drive->sect) { 66 drive->cyl = drive->bios_cyl = id[ATA_ID_CYLS]; 67 drive->head = drive->bios_head = id[ATA_ID_HEADS]; 68 drive->sect = drive->bios_sect = id[ATA_ID_SECTORS]; 69 } 70 71 /* Handle logical geometry translation by the drive */ 72 if (ata_id_current_chs_valid(id)) { 73 drive->cyl = id[ATA_ID_CUR_CYLS]; 74 drive->head = id[ATA_ID_CUR_HEADS]; 75 drive->sect = id[ATA_ID_CUR_SECTORS]; 76 } 77 78 /* Use physical geometry if what we have still makes no sense */ 79 if (drive->head > 16 && id[ATA_ID_HEADS] && id[ATA_ID_HEADS] <= 16) { 80 drive->cyl = id[ATA_ID_CYLS]; 81 drive->head = id[ATA_ID_HEADS]; 82 drive->sect = id[ATA_ID_SECTORS]; 83 } 84} 85 86static void ide_disk_init_mult_count(ide_drive_t *drive) 87{ 88 u16 *id = drive->id; 89 u8 max_multsect = id[ATA_ID_MAX_MULTSECT] & 0xff; 90 91 if (max_multsect) { 92 if ((max_multsect / 2) > 1) 93 id[ATA_ID_MULTSECT] = max_multsect | 0x100; 94 else 95 id[ATA_ID_MULTSECT] &= ~0x1ff; 96 97 drive->mult_req = id[ATA_ID_MULTSECT] & 0xff; 98 99 if (drive->mult_req) 100 drive->special.b.set_multmode = 1; 101 } 102} 103 104static void ide_classify_ata_dev(ide_drive_t *drive) 105{ 106 u16 *id = drive->id; 107 char *m = (char *)&id[ATA_ID_PROD]; 108 int is_cfa = ata_id_is_cfa(id); 109 110 /* CF devices are *not* removable in Linux definition of the term */ 111 if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7))) 112 drive->dev_flags |= IDE_DFLAG_REMOVABLE; 113 114 drive->media = ide_disk; 115 116 if (!ata_id_has_unload(drive->id)) 117 drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; 118 119 printk(KERN_INFO "%s: %s, %s DISK drive\n", drive->name, m, 120 is_cfa ? "CFA" : "ATA"); 121} 122 123static void ide_classify_atapi_dev(ide_drive_t *drive) 124{ 125 u16 *id = drive->id; 126 char *m = (char *)&id[ATA_ID_PROD]; 127 u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f; 128 129 printk(KERN_INFO "%s: %s, ATAPI ", drive->name, m); 130 switch (type) { 131 case ide_floppy: 132 if (!strstr(m, "CD-ROM")) { 133 if (!strstr(m, "oppy") && 134 !strstr(m, "poyp") && 135 !strstr(m, "ZIP")) 136 printk(KERN_CONT "cdrom or floppy?, assuming "); 137 if (drive->media != ide_cdrom) { 138 printk(KERN_CONT "FLOPPY"); 139 drive->dev_flags |= IDE_DFLAG_REMOVABLE; 140 break; 141 } 142 } 143 /* Early cdrom models used zero */ 144 type = ide_cdrom; 145 case ide_cdrom: 146 drive->dev_flags |= IDE_DFLAG_REMOVABLE; 147#ifdef CONFIG_PPC 148 /* kludge for Apple PowerBook internal zip */ 149 if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) { 150 printk(KERN_CONT "FLOPPY"); 151 type = ide_floppy; 152 break; 153 } 154#endif 155 printk(KERN_CONT "CD/DVD-ROM"); 156 break; 157 case ide_tape: 158 printk(KERN_CONT "TAPE"); 159 break; 160 case ide_optical: 161 printk(KERN_CONT "OPTICAL"); 162 drive->dev_flags |= IDE_DFLAG_REMOVABLE; 163 break; 164 default: 165 printk(KERN_CONT "UNKNOWN (type %d)", type); 166 break; 167 } 168 169 printk(KERN_CONT " drive\n"); 170 drive->media = type; 171 /* an ATAPI device ignores DRDY */ 172 drive->ready_stat = 0; 173 if (ata_id_cdb_intr(id)) 174 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT; 175 drive->dev_flags |= IDE_DFLAG_DOORLOCKING; 176 /* we don't do head unloading on ATAPI devices */ 177 drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; 178} 179 180/** 181 * do_identify - identify a drive 182 * @drive: drive to identify 183 * @cmd: command used 184 * 185 * Called when we have issued a drive identify command to 186 * read and parse the results. This function is run with 187 * interrupts disabled. 188 */ 189 190static void do_identify(ide_drive_t *drive, u8 cmd) 191{ 192 ide_hwif_t *hwif = drive->hwif; 193 u16 *id = drive->id; 194 char *m = (char *)&id[ATA_ID_PROD]; 195 unsigned long flags; 196 int bswap = 1; 197 198 /* local CPU only; some systems need this */ 199 local_irq_save(flags); 200 /* read 512 bytes of id info */ 201 hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); 202 local_irq_restore(flags); 203 204 drive->dev_flags |= IDE_DFLAG_ID_READ; 205#ifdef DEBUG 206 printk(KERN_INFO "%s: dumping identify data\n", drive->name); 207 ide_dump_identify((u8 *)id); 208#endif 209 ide_fix_driveid(id); 210 211 /* 212 * ATA_CMD_ID_ATA returns little-endian info, 213 * ATA_CMD_ID_ATAPI *usually* returns little-endian info. 214 */ 215 if (cmd == ATA_CMD_ID_ATAPI) { 216 if ((m[0] == 'N' && m[1] == 'E') || /* NEC */ 217 (m[0] == 'F' && m[1] == 'X') || /* Mitsumi */ 218 (m[0] == 'P' && m[1] == 'i')) /* Pioneer */ 219 /* Vertos drives may still be weird */ 220 bswap ^= 1; 221 } 222 223 ide_fixstring(m, ATA_ID_PROD_LEN, bswap); 224 ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap); 225 ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap); 226 227 /* we depend on this a lot! */ 228 m[ATA_ID_PROD_LEN - 1] = '\0'; 229 230 if (strstr(m, "E X A B Y T E N E S T")) 231 goto err_misc; 232 233 drive->dev_flags |= IDE_DFLAG_PRESENT; 234 drive->dev_flags &= ~IDE_DFLAG_DEAD; 235 236 /* 237 * Check for an ATAPI device 238 */ 239 if (cmd == ATA_CMD_ID_ATAPI) 240 ide_classify_atapi_dev(drive); 241 else 242 /* 243 * Not an ATAPI device: looks like a "regular" hard disk 244 */ 245 ide_classify_ata_dev(drive); 246 return; 247err_misc: 248 kfree(id); 249 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 250} 251 252/** 253 * actual_try_to_identify - send ata/atapi identify 254 * @drive: drive to identify 255 * @cmd: command to use 256 * 257 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive 258 * and waits for a response. It also monitors irqs while this is 259 * happening, in hope of automatically determining which one is 260 * being used by the interface. 261 * 262 * Returns: 0 device was identified 263 * 1 device timed-out (no response to identify request) 264 * 2 device aborted the command (refused to identify itself) 265 */ 266 267static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) 268{ 269 ide_hwif_t *hwif = drive->hwif; 270 struct ide_io_ports *io_ports = &hwif->io_ports; 271 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 272 int use_altstatus = 0, rc; 273 unsigned long timeout; 274 u8 s = 0, a = 0; 275 276 /* take a deep breath */ 277 msleep(50); 278 279 if (io_ports->ctl_addr && 280 (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) { 281 a = tp_ops->read_altstatus(hwif); 282 s = tp_ops->read_status(hwif); 283 if ((a ^ s) & ~ATA_IDX) 284 /* ancient Seagate drives, broken interfaces */ 285 printk(KERN_INFO "%s: probing with STATUS(0x%02x) " 286 "instead of ALTSTATUS(0x%02x)\n", 287 drive->name, s, a); 288 else 289 /* use non-intrusive polling */ 290 use_altstatus = 1; 291 } 292 293 /* set features register for atapi 294 * identify command to be sure of reply 295 */ 296 if (cmd == ATA_CMD_ID_ATAPI) { 297 ide_task_t task; 298 299 memset(&task, 0, sizeof(task)); 300 /* disable DMA & overlap */ 301 task.tf_flags = IDE_TFLAG_OUT_FEATURE; 302 303 tp_ops->tf_load(drive, &task); 304 } 305 306 /* ask drive for ID */ 307 tp_ops->exec_command(hwif, cmd); 308 309 timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; 310 311 if (ide_busy_sleep(hwif, timeout, use_altstatus)) 312 return 1; 313 314 /* wait for IRQ and ATA_DRQ */ 315 msleep(50); 316 s = tp_ops->read_status(hwif); 317 318 if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) { 319 /* drive returned ID */ 320 do_identify(drive, cmd); 321 /* drive responded with ID */ 322 rc = 0; 323 /* clear drive IRQ */ 324 (void)tp_ops->read_status(hwif); 325 } else { 326 /* drive refused ID */ 327 rc = 2; 328 } 329 return rc; 330} 331 332/** 333 * try_to_identify - try to identify a drive 334 * @drive: drive to probe 335 * @cmd: command to use 336 * 337 * Issue the identify command and then do IRQ probing to 338 * complete the identification when needed by finding the 339 * IRQ the drive is attached to 340 */ 341 342static int try_to_identify (ide_drive_t *drive, u8 cmd) 343{ 344 ide_hwif_t *hwif = drive->hwif; 345 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 346 int retval; 347 int autoprobe = 0; 348 unsigned long cookie = 0; 349 350 /* 351 * Disable device irq unless we need to 352 * probe for it. Otherwise we'll get spurious 353 * interrupts during the identify-phase that 354 * the irq handler isn't expecting. 355 */ 356 if (hwif->io_ports.ctl_addr) { 357 if (!hwif->irq) { 358 autoprobe = 1; 359 cookie = probe_irq_on(); 360 } 361 tp_ops->set_irq(hwif, autoprobe); 362 } 363 364 retval = actual_try_to_identify(drive, cmd); 365 366 if (autoprobe) { 367 int irq; 368 369 tp_ops->set_irq(hwif, 0); 370 /* clear drive IRQ */ 371 (void)tp_ops->read_status(hwif); 372 udelay(5); 373 irq = probe_irq_off(cookie); 374 if (!hwif->irq) { 375 if (irq > 0) { 376 hwif->irq = irq; 377 } else { 378 /* Mmmm.. multiple IRQs.. 379 * don't know which was ours 380 */ 381 printk(KERN_ERR "%s: IRQ probe failed (0x%lx)\n", 382 drive->name, cookie); 383 } 384 } 385 } 386 return retval; 387} 388 389int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus) 390{ 391 u8 stat; 392 393 timeout += jiffies; 394 395 do { 396 msleep(50); /* give drive a breather */ 397 stat = altstatus ? hwif->tp_ops->read_altstatus(hwif) 398 : hwif->tp_ops->read_status(hwif); 399 if ((stat & ATA_BUSY) == 0) 400 return 0; 401 } while (time_before(jiffies, timeout)); 402 403 return 1; /* drive timed-out */ 404} 405 406static u8 ide_read_device(ide_drive_t *drive) 407{ 408 ide_task_t task; 409 410 memset(&task, 0, sizeof(task)); 411 task.tf_flags = IDE_TFLAG_IN_DEVICE; 412 413 drive->hwif->tp_ops->tf_read(drive, &task); 414 415 return task.tf.device; 416} 417 418/** 419 * do_probe - probe an IDE device 420 * @drive: drive to probe 421 * @cmd: command to use 422 * 423 * do_probe() has the difficult job of finding a drive if it exists, 424 * without getting hung up if it doesn't exist, without trampling on 425 * ethernet cards, and without leaving any IRQs dangling to haunt us later. 426 * 427 * If a drive is "known" to exist (from CMOS or kernel parameters), 428 * but does not respond right away, the probe will "hang in there" 429 * for the maximum wait time (about 30 seconds), otherwise it will 430 * exit much more quickly. 431 * 432 * Returns: 0 device was identified 433 * 1 device timed-out (no response to identify request) 434 * 2 device aborted the command (refused to identify itself) 435 * 3 bad status from device (possible for ATAPI drives) 436 * 4 probe was not attempted because failure was obvious 437 */ 438 439static int do_probe (ide_drive_t *drive, u8 cmd) 440{ 441 ide_hwif_t *hwif = drive->hwif; 442 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 443 int rc; 444 u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat; 445 446 /* avoid waiting for inappropriate probes */ 447 if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA) 448 return 4; 449 450#ifdef DEBUG 451 printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", 452 drive->name, present, drive->media, 453 (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI"); 454#endif 455 456 /* needed for some systems 457 * (e.g. crw9624 as drive0 with disk as slave) 458 */ 459 msleep(50); 460 SELECT_DRIVE(drive); 461 msleep(50); 462 463 if (ide_read_device(drive) != drive->select && present == 0) { 464 if (drive->dn & 1) { 465 /* exit with drive0 selected */ 466 SELECT_DRIVE(hwif->devices[0]); 467 /* allow ATA_BUSY to assert & clear */ 468 msleep(50); 469 } 470 /* no i/f present: mmm.. this should be a 4 -ml */ 471 return 3; 472 } 473 474 stat = tp_ops->read_status(hwif); 475 476 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) || 477 present || cmd == ATA_CMD_ID_ATAPI) { 478 /* send cmd and wait */ 479 if ((rc = try_to_identify(drive, cmd))) { 480 /* failed: try again */ 481 rc = try_to_identify(drive,cmd); 482 } 483 484 stat = tp_ops->read_status(hwif); 485 486 if (stat == (ATA_BUSY | ATA_DRDY)) 487 return 4; 488 489 if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) { 490 printk(KERN_ERR "%s: no response (status = 0x%02x), " 491 "resetting drive\n", drive->name, stat); 492 msleep(50); 493 SELECT_DRIVE(drive); 494 msleep(50); 495 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); 496 (void)ide_busy_sleep(hwif, WAIT_WORSTCASE, 0); 497 rc = try_to_identify(drive, cmd); 498 } 499 500 /* ensure drive IRQ is clear */ 501 stat = tp_ops->read_status(hwif); 502 503 if (rc == 1) 504 printk(KERN_ERR "%s: no response (status = 0x%02x)\n", 505 drive->name, stat); 506 } else { 507 /* not present or maybe ATAPI */ 508 rc = 3; 509 } 510 if (drive->dn & 1) { 511 /* exit with drive0 selected */ 512 SELECT_DRIVE(hwif->devices[0]); 513 msleep(50); 514 /* ensure drive irq is clear */ 515 (void)tp_ops->read_status(hwif); 516 } 517 return rc; 518} 519 520/* 521 * 522 */ 523static void enable_nest (ide_drive_t *drive) 524{ 525 ide_hwif_t *hwif = drive->hwif; 526 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 527 u8 stat; 528 529 printk(KERN_INFO "%s: enabling %s -- ", 530 hwif->name, (char *)&drive->id[ATA_ID_PROD]); 531 532 SELECT_DRIVE(drive); 533 msleep(50); 534 tp_ops->exec_command(hwif, ATA_EXABYTE_ENABLE_NEST); 535 536 if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 0)) { 537 printk(KERN_CONT "failed (timeout)\n"); 538 return; 539 } 540 541 msleep(50); 542 543 stat = tp_ops->read_status(hwif); 544 545 if (!OK_STAT(stat, 0, BAD_STAT)) 546 printk(KERN_CONT "failed (status = 0x%02x)\n", stat); 547 else 548 printk(KERN_CONT "success\n"); 549} 550 551/** 552 * probe_for_drives - upper level drive probe 553 * @drive: drive to probe for 554 * 555 * probe_for_drive() tests for existence of a given drive using do_probe() 556 * and presents things to the user as needed. 557 * 558 * Returns: 0 no device was found 559 * 1 device was found 560 * (note: IDE_DFLAG_PRESENT might still be not set) 561 */ 562 563static u8 probe_for_drive(ide_drive_t *drive) 564{ 565 char *m; 566 567 /* 568 * In order to keep things simple we have an id 569 * block for all drives at all times. If the device 570 * is pre ATA or refuses ATA/ATAPI identify we 571 * will add faked data to this. 572 * 573 * Also note that 0 everywhere means "can't do X" 574 */ 575 576 drive->dev_flags &= ~IDE_DFLAG_ID_READ; 577 578 drive->id = kzalloc(SECTOR_SIZE, GFP_KERNEL); 579 if (drive->id == NULL) { 580 printk(KERN_ERR "ide: out of memory for id data.\n"); 581 return 0; 582 } 583 584 m = (char *)&drive->id[ATA_ID_PROD]; 585 strcpy(m, "UNKNOWN"); 586 587 /* skip probing? */ 588 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) { 589retry: 590 /* if !(success||timed-out) */ 591 if (do_probe(drive, ATA_CMD_ID_ATA) >= 2) 592 /* look for ATAPI device */ 593 (void)do_probe(drive, ATA_CMD_ID_ATAPI); 594 595 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 596 /* drive not found */ 597 return 0; 598 599 if (strstr(m, "E X A B Y T E N E S T")) { 600 enable_nest(drive); 601 goto retry; 602 } 603 604 /* identification failed? */ 605 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { 606 if (drive->media == ide_disk) { 607 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", 608 drive->name, drive->cyl, 609 drive->head, drive->sect); 610 } else if (drive->media == ide_cdrom) { 611 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); 612 } else { 613 /* nuke it */ 614 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); 615 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 616 } 617 } 618 /* drive was found */ 619 } 620 621 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 622 return 0; 623 624 /* The drive wasn't being helpful. Add generic info only */ 625 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { 626 generic_id(drive); 627 return 1; 628 } 629 630 if (drive->media == ide_disk) { 631 ide_disk_init_chs(drive); 632 ide_disk_init_mult_count(drive); 633 } 634 635 return !!(drive->dev_flags & IDE_DFLAG_PRESENT); 636} 637 638static void hwif_release_dev(struct device *dev) 639{ 640 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); 641 642 complete(&hwif->gendev_rel_comp); 643} 644 645static int ide_register_port(ide_hwif_t *hwif) 646{ 647 int ret; 648 649 /* register with global device tree */ 650 dev_set_name(&hwif->gendev, hwif->name); 651 hwif->gendev.driver_data = hwif; 652 if (hwif->gendev.parent == NULL) 653 hwif->gendev.parent = hwif->dev; 654 hwif->gendev.release = hwif_release_dev; 655 656 ret = device_register(&hwif->gendev); 657 if (ret < 0) { 658 printk(KERN_WARNING "IDE: %s: device_register error: %d\n", 659 __func__, ret); 660 goto out; 661 } 662 663 hwif->portdev = device_create(ide_port_class, &hwif->gendev, 664 MKDEV(0, 0), hwif, hwif->name); 665 if (IS_ERR(hwif->portdev)) { 666 ret = PTR_ERR(hwif->portdev); 667 device_unregister(&hwif->gendev); 668 } 669out: 670 return ret; 671} 672 673/** 674 * ide_port_wait_ready - wait for port to become ready 675 * @hwif: IDE port 676 * 677 * This is needed on some PPCs and a bunch of BIOS-less embedded 678 * platforms. Typical cases are: 679 * 680 * - The firmware hard reset the disk before booting the kernel, 681 * the drive is still doing it's poweron-reset sequence, that 682 * can take up to 30 seconds. 683 * 684 * - The firmware does nothing (or no firmware), the device is 685 * still in POST state (same as above actually). 686 * 687 * - Some CD/DVD/Writer combo drives tend to drive the bus during 688 * their reset sequence even when they are non-selected slave 689 * devices, thus preventing discovery of the main HD. 690 * 691 * Doing this wait-for-non-busy should not harm any existing 692 * configuration and fix some issues like the above. 693 * 694 * BenH. 695 * 696 * Returns 0 on success, error code (< 0) otherwise. 697 */ 698 699static int ide_port_wait_ready(ide_hwif_t *hwif) 700{ 701 ide_drive_t *drive; 702 int i, rc; 703 704 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); 705 706 /* Let HW settle down a bit from whatever init state we 707 * come from */ 708 mdelay(2); 709 710 /* Wait for BSY bit to go away, spec timeout is 30 seconds, 711 * I know of at least one disk who takes 31 seconds, I use 35 712 * here to be safe 713 */ 714 rc = ide_wait_not_busy(hwif, 35000); 715 if (rc) 716 return rc; 717 718 /* Now make sure both master & slave are ready */ 719 ide_port_for_each_dev(i, drive, hwif) { 720 /* Ignore disks that we will not probe for later. */ 721 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 || 722 (drive->dev_flags & IDE_DFLAG_PRESENT)) { 723 SELECT_DRIVE(drive); 724 hwif->tp_ops->set_irq(hwif, 1); 725 mdelay(2); 726 rc = ide_wait_not_busy(hwif, 35000); 727 if (rc) 728 goto out; 729 } else 730 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", 731 drive->name); 732 } 733out: 734 /* Exit function with master reselected (let's be sane) */ 735 if (i) 736 SELECT_DRIVE(hwif->devices[0]); 737 738 return rc; 739} 740 741/** 742 * ide_undecoded_slave - look for bad CF adapters 743 * @dev1: slave device 744 * 745 * Analyse the drives on the interface and attempt to decide if we 746 * have the same drive viewed twice. This occurs with crap CF adapters 747 * and PCMCIA sometimes. 748 */ 749 750void ide_undecoded_slave(ide_drive_t *dev1) 751{ 752 ide_drive_t *dev0 = dev1->hwif->devices[0]; 753 754 if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0) 755 return; 756 757 /* If the models don't match they are not the same product */ 758 if (strcmp((char *)&dev0->id[ATA_ID_PROD], 759 (char *)&dev1->id[ATA_ID_PROD])) 760 return; 761 762 /* Serial numbers do not match */ 763 if (strncmp((char *)&dev0->id[ATA_ID_SERNO], 764 (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN)) 765 return; 766 767 /* No serial number, thankfully very rare for CF */ 768 if (*(char *)&dev0->id[ATA_ID_SERNO] == 0) 769 return; 770 771 /* Appears to be an IDE flash adapter with decode bugs */ 772 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); 773 774 dev1->dev_flags &= ~IDE_DFLAG_PRESENT; 775} 776 777EXPORT_SYMBOL_GPL(ide_undecoded_slave); 778 779static int ide_probe_port(ide_hwif_t *hwif) 780{ 781 ide_drive_t *drive; 782 unsigned int irqd; 783 int i, rc = -ENODEV; 784 785 BUG_ON(hwif->present); 786 787 if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) && 788 (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE)) 789 return -EACCES; 790 791 /* 792 * We must always disable IRQ, as probe_for_drive will assert IRQ, but 793 * we'll install our IRQ driver much later... 794 */ 795 irqd = hwif->irq; 796 if (irqd) 797 disable_irq(hwif->irq); 798 799 if (ide_port_wait_ready(hwif) == -EBUSY) 800 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); 801 802 /* 803 * Second drive should only exist if first drive was found, 804 * but a lot of cdrom drives are configured as single slaves. 805 */ 806 ide_port_for_each_dev(i, drive, hwif) { 807 (void) probe_for_drive(drive); 808 if (drive->dev_flags & IDE_DFLAG_PRESENT) 809 rc = 0; 810 } 811 812 /* 813 * Use cached IRQ number. It might be (and is...) changed by probe 814 * code above 815 */ 816 if (irqd) 817 enable_irq(irqd); 818 819 return rc; 820} 821 822static void ide_port_tune_devices(ide_hwif_t *hwif) 823{ 824 const struct ide_port_ops *port_ops = hwif->port_ops; 825 ide_drive_t *drive; 826 int i; 827 828 ide_port_for_each_present_dev(i, drive, hwif) { 829 if (port_ops && port_ops->quirkproc) 830 port_ops->quirkproc(drive); 831 } 832 833 ide_port_for_each_present_dev(i, drive, hwif) { 834 ide_set_max_pio(drive); 835 836 drive->dev_flags |= IDE_DFLAG_NICE1; 837 838 if (hwif->dma_ops) 839 ide_set_dma(drive); 840 } 841} 842 843/* 844 * init request queue 845 */ 846static int ide_init_queue(ide_drive_t *drive) 847{ 848 struct request_queue *q; 849 ide_hwif_t *hwif = drive->hwif; 850 int max_sectors = 256; 851 int max_sg_entries = PRD_ENTRIES; 852 853 /* 854 * Our default set up assumes the normal IDE case, 855 * that is 64K segmenting, standard PRD setup 856 * and LBA28. Some drivers then impose their own 857 * limits and LBA48 we could raise it but as yet 858 * do not. 859 */ 860 861 q = blk_init_queue_node(do_ide_request, NULL, hwif_to_node(hwif)); 862 if (!q) 863 return 1; 864 865 q->queuedata = drive; 866 blk_queue_segment_boundary(q, 0xffff); 867 868 if (hwif->rqsize < max_sectors) 869 max_sectors = hwif->rqsize; 870 blk_queue_max_sectors(q, max_sectors); 871 872#ifdef CONFIG_PCI 873 /* When we have an IOMMU, we may have a problem where pci_map_sg() 874 * creates segments that don't completely match our boundary 875 * requirements and thus need to be broken up again. Because it 876 * doesn't align properly either, we may actually have to break up 877 * to more segments than what was we got in the first place, a max 878 * worst case is twice as many. 879 * This will be fixed once we teach pci_map_sg() about our boundary 880 * requirements, hopefully soon. *FIXME* 881 */ 882 if (!PCI_DMA_BUS_IS_PHYS) 883 max_sg_entries >>= 1; 884#endif /* CONFIG_PCI */ 885 886 blk_queue_max_hw_segments(q, max_sg_entries); 887 blk_queue_max_phys_segments(q, max_sg_entries); 888 889 /* assign drive queue */ 890 drive->queue = q; 891 892 /* needs drive->queue to be set */ 893 ide_toggle_bounce(drive, 1); 894 895 return 0; 896} 897 898static DEFINE_MUTEX(ide_cfg_mtx); 899 900/* 901 * For any present drive: 902 * - allocate the block device queue 903 */ 904static int ide_port_setup_devices(ide_hwif_t *hwif) 905{ 906 ide_drive_t *drive; 907 int i, j = 0; 908 909 mutex_lock(&ide_cfg_mtx); 910 ide_port_for_each_present_dev(i, drive, hwif) { 911 if (ide_init_queue(drive)) { 912 printk(KERN_ERR "ide: failed to init %s\n", 913 drive->name); 914 kfree(drive->id); 915 drive->id = NULL; 916 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 917 continue; 918 } 919 920 j++; 921 } 922 mutex_unlock(&ide_cfg_mtx); 923 924 return j; 925} 926 927/* 928 * This routine sets up the IRQ for an IDE interface. 929 */ 930static int init_irq (ide_hwif_t *hwif) 931{ 932 struct ide_io_ports *io_ports = &hwif->io_ports; 933 irq_handler_t irq_handler; 934 int sa = 0; 935 936 irq_handler = hwif->host->irq_handler; 937 if (irq_handler == NULL) 938 irq_handler = ide_intr; 939 940#if defined(__mc68000__) 941 sa = IRQF_SHARED; 942#endif /* __mc68000__ */ 943 944 if (hwif->chipset == ide_pci) 945 sa = IRQF_SHARED; 946 947 if (io_ports->ctl_addr) 948 hwif->tp_ops->set_irq(hwif, 1); 949 950 if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif)) 951 goto out_up; 952 953 if (!hwif->rqsize) { 954 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || 955 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) 956 hwif->rqsize = 256; 957 else 958 hwif->rqsize = 65536; 959 } 960 961#if !defined(__mc68000__) 962 printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 963 io_ports->data_addr, io_ports->status_addr, 964 io_ports->ctl_addr, hwif->irq); 965#else 966 printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, 967 io_ports->data_addr, hwif->irq); 968#endif /* __mc68000__ */ 969 if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE) 970 printk(KERN_CONT " (serialized)"); 971 printk(KERN_CONT "\n"); 972 973 return 0; 974out_up: 975 return 1; 976} 977 978static int ata_lock(dev_t dev, void *data) 979{ 980 /* FIXME: we want to pin hwif down */ 981 return 0; 982} 983 984static struct kobject *ata_probe(dev_t dev, int *part, void *data) 985{ 986 ide_hwif_t *hwif = data; 987 int unit = *part >> PARTN_BITS; 988 ide_drive_t *drive = hwif->devices[unit]; 989 990 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 991 return NULL; 992 993 if (drive->media == ide_disk) 994 request_module("ide-disk"); 995 if (drive->media == ide_cdrom || drive->media == ide_optical) 996 request_module("ide-cd"); 997 if (drive->media == ide_tape) 998 request_module("ide-tape"); 999 if (drive->media == ide_floppy) 1000 request_module("ide-floppy"); 1001 1002 return NULL; 1003} 1004 1005static struct kobject *exact_match(dev_t dev, int *part, void *data) 1006{ 1007 struct gendisk *p = data; 1008 *part &= (1 << PARTN_BITS) - 1; 1009 return &disk_to_dev(p)->kobj; 1010} 1011 1012static int exact_lock(dev_t dev, void *data) 1013{ 1014 struct gendisk *p = data; 1015 1016 if (!get_disk(p)) 1017 return -1; 1018 return 0; 1019} 1020 1021void ide_register_region(struct gendisk *disk) 1022{ 1023 blk_register_region(MKDEV(disk->major, disk->first_minor), 1024 disk->minors, NULL, exact_match, exact_lock, disk); 1025} 1026 1027EXPORT_SYMBOL_GPL(ide_register_region); 1028 1029void ide_unregister_region(struct gendisk *disk) 1030{ 1031 blk_unregister_region(MKDEV(disk->major, disk->first_minor), 1032 disk->minors); 1033} 1034 1035EXPORT_SYMBOL_GPL(ide_unregister_region); 1036 1037void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) 1038{ 1039 ide_hwif_t *hwif = drive->hwif; 1040 unsigned int unit = drive->dn & 1; 1041 1042 disk->major = hwif->major; 1043 disk->first_minor = unit << PARTN_BITS; 1044 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); 1045 disk->queue = drive->queue; 1046} 1047 1048EXPORT_SYMBOL_GPL(ide_init_disk); 1049 1050static void drive_release_dev (struct device *dev) 1051{ 1052 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); 1053 ide_hwif_t *hwif = drive->hwif; 1054 1055 ide_proc_unregister_device(drive); 1056 1057 spin_lock_irq(&hwif->lock); 1058 kfree(drive->id); 1059 drive->id = NULL; 1060 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 1061 /* Messed up locking ... */ 1062 spin_unlock_irq(&hwif->lock); 1063 blk_cleanup_queue(drive->queue); 1064 spin_lock_irq(&hwif->lock); 1065 drive->queue = NULL; 1066 spin_unlock_irq(&hwif->lock); 1067 1068 complete(&drive->gendev_rel_comp); 1069} 1070 1071static int hwif_init(ide_hwif_t *hwif) 1072{ 1073 int old_irq; 1074 1075 if (!hwif->irq) { 1076 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); 1077 if (!hwif->irq) { 1078 printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); 1079 return 0; 1080 } 1081 } 1082 1083 if (register_blkdev(hwif->major, hwif->name)) 1084 return 0; 1085 1086 if (!hwif->sg_max_nents) 1087 hwif->sg_max_nents = PRD_ENTRIES; 1088 1089 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 1090 GFP_KERNEL); 1091 if (!hwif->sg_table) { 1092 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 1093 goto out; 1094 } 1095 1096 sg_init_table(hwif->sg_table, hwif->sg_max_nents); 1097 1098 if (init_irq(hwif) == 0) 1099 goto done; 1100 1101 old_irq = hwif->irq; 1102 /* 1103 * It failed to initialise. Find the default IRQ for 1104 * this port and try that. 1105 */ 1106 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); 1107 if (!hwif->irq) { 1108 printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", 1109 hwif->name, old_irq); 1110 goto out; 1111 } 1112 if (init_irq(hwif)) { 1113 printk(KERN_ERR "%s: probed IRQ %d and default IRQ %d failed\n", 1114 hwif->name, old_irq, hwif->irq); 1115 goto out; 1116 } 1117 printk(KERN_WARNING "%s: probed IRQ %d failed, using default\n", 1118 hwif->name, hwif->irq); 1119 1120done: 1121 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 1122 THIS_MODULE, ata_probe, ata_lock, hwif); 1123 return 1; 1124 1125out: 1126 unregister_blkdev(hwif->major, hwif->name); 1127 return 0; 1128} 1129 1130static void hwif_register_devices(ide_hwif_t *hwif) 1131{ 1132 ide_drive_t *drive; 1133 unsigned int i; 1134 1135 ide_port_for_each_present_dev(i, drive, hwif) { 1136 struct device *dev = &drive->gendev; 1137 int ret; 1138 1139 dev_set_name(dev, "%u.%u", hwif->index, i); 1140 dev->parent = &hwif->gendev; 1141 dev->bus = &ide_bus_type; 1142 dev->driver_data = drive; 1143 dev->release = drive_release_dev; 1144 1145 ret = device_register(dev); 1146 if (ret < 0) 1147 printk(KERN_WARNING "IDE: %s: device_register error: " 1148 "%d\n", __func__, ret); 1149 } 1150} 1151 1152static void ide_port_init_devices(ide_hwif_t *hwif) 1153{ 1154 const struct ide_port_ops *port_ops = hwif->port_ops; 1155 ide_drive_t *drive; 1156 int i; 1157 1158 ide_port_for_each_dev(i, drive, hwif) { 1159 drive->dn = i + hwif->channel * 2; 1160 1161 if (hwif->host_flags & IDE_HFLAG_IO_32BIT) 1162 drive->io_32bit = 1; 1163 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) 1164 drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; 1165 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) 1166 drive->dev_flags |= IDE_DFLAG_UNMASK; 1167 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) 1168 drive->dev_flags |= IDE_DFLAG_NO_UNMASK; 1169 1170 if (port_ops && port_ops->init_dev) 1171 port_ops->init_dev(drive); 1172 } 1173} 1174 1175static void ide_init_port(ide_hwif_t *hwif, unsigned int port, 1176 const struct ide_port_info *d) 1177{ 1178 hwif->channel = port; 1179 1180 if (d->chipset) 1181 hwif->chipset = d->chipset; 1182 1183 if (d->init_iops) 1184 d->init_iops(hwif); 1185 1186 if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || 1187 (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) 1188 hwif->irq = port ? 15 : 14; 1189 1190 /* ->host_flags may be set by ->init_iops (or even earlier...) */ 1191 hwif->host_flags |= d->host_flags; 1192 hwif->pio_mask = d->pio_mask; 1193 1194 if (d->tp_ops) 1195 hwif->tp_ops = d->tp_ops; 1196 1197 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ 1198 if (hwif->chipset != ide_dtc2278 || hwif->channel == 0) 1199 hwif->port_ops = d->port_ops; 1200 1201 hwif->swdma_mask = d->swdma_mask; 1202 hwif->mwdma_mask = d->mwdma_mask; 1203 hwif->ultra_mask = d->udma_mask; 1204 1205 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { 1206 int rc; 1207 1208 hwif->dma_ops = d->dma_ops; 1209 1210 if (d->init_dma) 1211 rc = d->init_dma(hwif, d); 1212 else 1213 rc = ide_hwif_setup_dma(hwif, d); 1214 1215 if (rc < 0) { 1216 printk(KERN_INFO "%s: DMA disabled\n", hwif->name); 1217 1218 hwif->dma_ops = NULL; 1219 hwif->dma_base = 0; 1220 hwif->swdma_mask = 0; 1221 hwif->mwdma_mask = 0; 1222 hwif->ultra_mask = 0; 1223 } 1224 } 1225 1226 if ((d->host_flags & IDE_HFLAG_SERIALIZE) || 1227 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) 1228 hwif->host->host_flags |= IDE_HFLAG_SERIALIZE; 1229 1230 if (d->max_sectors) 1231 hwif->rqsize = d->max_sectors; 1232 1233 /* call chipset specific routine for each enabled port */ 1234 if (d->init_hwif) 1235 d->init_hwif(hwif); 1236} 1237 1238static void ide_port_cable_detect(ide_hwif_t *hwif) 1239{ 1240 const struct ide_port_ops *port_ops = hwif->port_ops; 1241 1242 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { 1243 if (hwif->cbl != ATA_CBL_PATA40_SHORT) 1244 hwif->cbl = port_ops->cable_detect(hwif); 1245 } 1246} 1247 1248static const u8 ide_hwif_to_major[] = 1249 { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR, 1250 IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR }; 1251 1252static void ide_port_init_devices_data(ide_hwif_t *hwif) 1253{ 1254 ide_drive_t *drive; 1255 int i; 1256 1257 ide_port_for_each_dev(i, drive, hwif) { 1258 u8 j = (hwif->index * MAX_DRIVES) + i; 1259 1260 memset(drive, 0, sizeof(*drive)); 1261 1262 drive->media = ide_disk; 1263 drive->select = (i << 4) | ATA_DEVICE_OBS; 1264 drive->hwif = hwif; 1265 drive->ready_stat = ATA_DRDY; 1266 drive->bad_wstat = BAD_W_STAT; 1267 drive->special.b.recalibrate = 1; 1268 drive->special.b.set_geometry = 1; 1269 drive->name[0] = 'h'; 1270 drive->name[1] = 'd'; 1271 drive->name[2] = 'a' + j; 1272 drive->max_failures = IDE_DEFAULT_MAX_FAILURES; 1273 1274 INIT_LIST_HEAD(&drive->list); 1275 init_completion(&drive->gendev_rel_comp); 1276 } 1277} 1278 1279static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) 1280{ 1281 /* fill in any non-zero initial values */ 1282 hwif->index = index; 1283 hwif->major = ide_hwif_to_major[index]; 1284 1285 hwif->name[0] = 'i'; 1286 hwif->name[1] = 'd'; 1287 hwif->name[2] = 'e'; 1288 hwif->name[3] = '0' + index; 1289 1290 spin_lock_init(&hwif->lock); 1291 1292 init_timer(&hwif->timer); 1293 hwif->timer.function = &ide_timer_expiry; 1294 hwif->timer.data = (unsigned long)hwif; 1295 1296 init_completion(&hwif->gendev_rel_comp); 1297 1298 hwif->tp_ops = &default_tp_ops; 1299 1300 ide_port_init_devices_data(hwif); 1301} 1302 1303static void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw) 1304{ 1305 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); 1306 hwif->irq = hw->irq; 1307 hwif->chipset = hw->chipset; 1308 hwif->dev = hw->dev; 1309 hwif->gendev.parent = hw->parent ? hw->parent : hw->dev; 1310 hwif->ack_intr = hw->ack_intr; 1311 hwif->config_data = hw->config; 1312} 1313 1314static unsigned int ide_indexes; 1315 1316/** 1317 * ide_find_port_slot - find free port slot 1318 * @d: IDE port info 1319 * 1320 * Return the new port slot index or -ENOENT if we are out of free slots. 1321 */ 1322 1323static int ide_find_port_slot(const struct ide_port_info *d) 1324{ 1325 int idx = -ENOENT; 1326 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; 1327 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; 1328 1329 /* 1330 * Claim an unassigned slot. 1331 * 1332 * Give preference to claiming other slots before claiming ide0/ide1, 1333 * just in case there's another interface yet-to-be-scanned 1334 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). 1335 * 1336 * Unless there is a bootable card that does not use the standard 1337 * ports 0x1f0/0x170 (the ide0/ide1 defaults). 1338 */ 1339 mutex_lock(&ide_cfg_mtx); 1340 if (bootable) { 1341 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) 1342 idx = ffz(ide_indexes | i); 1343 } else { 1344 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) 1345 idx = ffz(ide_indexes | 3); 1346 else if ((ide_indexes & 3) != 3) 1347 idx = ffz(ide_indexes); 1348 } 1349 if (idx >= 0) 1350 ide_indexes |= (1 << idx); 1351 mutex_unlock(&ide_cfg_mtx); 1352 1353 return idx; 1354} 1355 1356static void ide_free_port_slot(int idx) 1357{ 1358 mutex_lock(&ide_cfg_mtx); 1359 ide_indexes &= ~(1 << idx); 1360 mutex_unlock(&ide_cfg_mtx); 1361} 1362 1363static void ide_port_free_devices(ide_hwif_t *hwif) 1364{ 1365 ide_drive_t *drive; 1366 int i; 1367 1368 ide_port_for_each_dev(i, drive, hwif) 1369 kfree(drive); 1370} 1371 1372static int ide_port_alloc_devices(ide_hwif_t *hwif, int node) 1373{ 1374 int i; 1375 1376 for (i = 0; i < MAX_DRIVES; i++) { 1377 ide_drive_t *drive; 1378 1379 drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node); 1380 if (drive == NULL) 1381 goto out_nomem; 1382 1383 hwif->devices[i] = drive; 1384 } 1385 return 0; 1386 1387out_nomem: 1388 ide_port_free_devices(hwif); 1389 return -ENOMEM; 1390} 1391 1392struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws) 1393{ 1394 struct ide_host *host; 1395 struct device *dev = hws[0] ? hws[0]->dev : NULL; 1396 int node = dev ? dev_to_node(dev) : -1; 1397 int i; 1398 1399 host = kzalloc_node(sizeof(*host), GFP_KERNEL, node); 1400 if (host == NULL) 1401 return NULL; 1402 1403 for (i = 0; i < MAX_HOST_PORTS; i++) { 1404 ide_hwif_t *hwif; 1405 int idx; 1406 1407 if (hws[i] == NULL) 1408 continue; 1409 1410 hwif = kzalloc_node(sizeof(*hwif), GFP_KERNEL, node); 1411 if (hwif == NULL) 1412 continue; 1413 1414 if (ide_port_alloc_devices(hwif, node) < 0) { 1415 kfree(hwif); 1416 continue; 1417 } 1418 1419 idx = ide_find_port_slot(d); 1420 if (idx < 0) { 1421 printk(KERN_ERR "%s: no free slot for interface\n", 1422 d ? d->name : "ide"); 1423 kfree(hwif); 1424 continue; 1425 } 1426 1427 ide_init_port_data(hwif, idx); 1428 1429 hwif->host = host; 1430 1431 host->ports[i] = hwif; 1432 host->n_ports++; 1433 } 1434 1435 if (host->n_ports == 0) { 1436 kfree(host); 1437 return NULL; 1438 } 1439 1440 host->dev[0] = dev; 1441 1442 if (d) { 1443 host->init_chipset = d->init_chipset; 1444 host->host_flags = d->host_flags; 1445 } 1446 1447 return host; 1448} 1449EXPORT_SYMBOL_GPL(ide_host_alloc); 1450 1451static void ide_port_free(ide_hwif_t *hwif) 1452{ 1453 ide_port_free_devices(hwif); 1454 ide_free_port_slot(hwif->index); 1455 kfree(hwif); 1456} 1457 1458static void ide_disable_port(ide_hwif_t *hwif) 1459{ 1460 struct ide_host *host = hwif->host; 1461 int i; 1462 1463 printk(KERN_INFO "%s: disabling port\n", hwif->name); 1464 1465 for (i = 0; i < MAX_HOST_PORTS; i++) { 1466 if (host->ports[i] == hwif) { 1467 host->ports[i] = NULL; 1468 host->n_ports--; 1469 } 1470 } 1471 1472 ide_port_free(hwif); 1473} 1474 1475int ide_host_register(struct ide_host *host, const struct ide_port_info *d, 1476 hw_regs_t **hws) 1477{ 1478 ide_hwif_t *hwif, *mate = NULL; 1479 int i, j = 0; 1480 1481 ide_host_for_each_port(i, hwif, host) { 1482 if (hwif == NULL) { 1483 mate = NULL; 1484 continue; 1485 } 1486 1487 ide_init_port_hw(hwif, hws[i]); 1488 ide_port_apply_params(hwif); 1489 1490 if (d == NULL) { 1491 mate = NULL; 1492 } else { 1493 if ((i & 1) && mate) { 1494 hwif->mate = mate; 1495 mate->mate = hwif; 1496 } 1497 1498 mate = (i & 1) ? NULL : hwif; 1499 1500 ide_init_port(hwif, i & 1, d); 1501 ide_port_cable_detect(hwif); 1502 } 1503 1504 ide_port_init_devices(hwif); 1505 } 1506 1507 ide_host_for_each_port(i, hwif, host) { 1508 if (hwif == NULL) 1509 continue; 1510 1511 if (ide_probe_port(hwif) == 0) 1512 hwif->present = 1; 1513 1514 if (hwif->chipset != ide_4drives || !hwif->mate || 1515 !hwif->mate->present) { 1516 if (ide_register_port(hwif)) { 1517 ide_disable_port(hwif); 1518 continue; 1519 } 1520 } 1521 1522 if (hwif->present) 1523 ide_port_tune_devices(hwif); 1524 } 1525 1526 ide_host_for_each_port(i, hwif, host) { 1527 if (hwif == NULL) 1528 continue; 1529 1530 if (hwif_init(hwif) == 0) { 1531 printk(KERN_INFO "%s: failed to initialize IDE " 1532 "interface\n", hwif->name); 1533 device_unregister(&hwif->gendev); 1534 ide_disable_port(hwif); 1535 continue; 1536 } 1537 1538 if (hwif->present) 1539 if (ide_port_setup_devices(hwif) == 0) { 1540 hwif->present = 0; 1541 continue; 1542 } 1543 1544 j++; 1545 1546 ide_acpi_init(hwif); 1547 1548 if (hwif->present) 1549 ide_acpi_port_init_devices(hwif); 1550 } 1551 1552 ide_host_for_each_port(i, hwif, host) { 1553 if (hwif == NULL) 1554 continue; 1555 1556 if (hwif->present) 1557 hwif_register_devices(hwif); 1558 } 1559 1560 ide_host_for_each_port(i, hwif, host) { 1561 if (hwif == NULL) 1562 continue; 1563 1564 ide_sysfs_register_port(hwif); 1565 ide_proc_register_port(hwif); 1566 1567 if (hwif->present) 1568 ide_proc_port_register_devices(hwif); 1569 } 1570 1571 return j ? 0 : -1; 1572} 1573EXPORT_SYMBOL_GPL(ide_host_register); 1574 1575int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, 1576 struct ide_host **hostp) 1577{ 1578 struct ide_host *host; 1579 int rc; 1580 1581 host = ide_host_alloc(d, hws); 1582 if (host == NULL) 1583 return -ENOMEM; 1584 1585 rc = ide_host_register(host, d, hws); 1586 if (rc) { 1587 ide_host_free(host); 1588 return rc; 1589 } 1590 1591 if (hostp) 1592 *hostp = host; 1593 1594 return 0; 1595} 1596EXPORT_SYMBOL_GPL(ide_host_add); 1597 1598static void __ide_port_unregister_devices(ide_hwif_t *hwif) 1599{ 1600 ide_drive_t *drive; 1601 int i; 1602 1603 ide_port_for_each_present_dev(i, drive, hwif) { 1604 device_unregister(&drive->gendev); 1605 wait_for_completion(&drive->gendev_rel_comp); 1606 } 1607} 1608 1609void ide_port_unregister_devices(ide_hwif_t *hwif) 1610{ 1611 mutex_lock(&ide_cfg_mtx); 1612 __ide_port_unregister_devices(hwif); 1613 hwif->present = 0; 1614 ide_port_init_devices_data(hwif); 1615 mutex_unlock(&ide_cfg_mtx); 1616} 1617EXPORT_SYMBOL_GPL(ide_port_unregister_devices); 1618 1619/** 1620 * ide_unregister - free an IDE interface 1621 * @hwif: IDE interface 1622 * 1623 * Perform the final unregister of an IDE interface. 1624 * 1625 * Locking: 1626 * The caller must not hold the IDE locks. 1627 * 1628 * It is up to the caller to be sure there is no pending I/O here, 1629 * and that the interface will not be reopened (present/vanishing 1630 * locking isn't yet done BTW). 1631 */ 1632 1633static void ide_unregister(ide_hwif_t *hwif) 1634{ 1635 BUG_ON(in_interrupt()); 1636 BUG_ON(irqs_disabled()); 1637 1638 mutex_lock(&ide_cfg_mtx); 1639 1640 if (hwif->present) { 1641 __ide_port_unregister_devices(hwif); 1642 hwif->present = 0; 1643 } 1644 1645 ide_proc_unregister_port(hwif); 1646 1647 free_irq(hwif->irq, hwif); 1648 1649 device_unregister(hwif->portdev); 1650 device_unregister(&hwif->gendev); 1651 wait_for_completion(&hwif->gendev_rel_comp); 1652 1653 /* 1654 * Remove us from the kernel's knowledge 1655 */ 1656 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); 1657 kfree(hwif->sg_table); 1658 unregister_blkdev(hwif->major, hwif->name); 1659 1660 ide_release_dma_engine(hwif); 1661 1662 mutex_unlock(&ide_cfg_mtx); 1663} 1664 1665void ide_host_free(struct ide_host *host) 1666{ 1667 ide_hwif_t *hwif; 1668 int i; 1669 1670 ide_host_for_each_port(i, hwif, host) { 1671 if (hwif) 1672 ide_port_free(hwif); 1673 } 1674 1675 kfree(host); 1676} 1677EXPORT_SYMBOL_GPL(ide_host_free); 1678 1679void ide_host_remove(struct ide_host *host) 1680{ 1681 ide_hwif_t *hwif; 1682 int i; 1683 1684 ide_host_for_each_port(i, hwif, host) { 1685 if (hwif) 1686 ide_unregister(hwif); 1687 } 1688 1689 ide_host_free(host); 1690} 1691EXPORT_SYMBOL_GPL(ide_host_remove); 1692 1693void ide_port_scan(ide_hwif_t *hwif) 1694{ 1695 ide_port_apply_params(hwif); 1696 ide_port_cable_detect(hwif); 1697 ide_port_init_devices(hwif); 1698 1699 if (ide_probe_port(hwif) < 0) 1700 return; 1701 1702 hwif->present = 1; 1703 1704 ide_port_tune_devices(hwif); 1705 ide_port_setup_devices(hwif); 1706 ide_acpi_port_init_devices(hwif); 1707 hwif_register_devices(hwif); 1708 ide_proc_port_register_devices(hwif); 1709} 1710EXPORT_SYMBOL_GPL(ide_port_scan); 1711