ide-probe.c revision fcb5207723919ad85178420633d55efea80b652d
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_flags |= IDE_SFLAG_SET_MULTMODE; 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 * @id: buffer for IDENTIFY data 185 * 186 * Called when we have issued a drive identify command to 187 * read and parse the results. This function is run with 188 * interrupts disabled. 189 */ 190 191static void do_identify(ide_drive_t *drive, u8 cmd, u16 *id) 192{ 193 ide_hwif_t *hwif = drive->hwif; 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 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 232 else 233 drive->dev_flags |= IDE_DFLAG_PRESENT; 234} 235 236/** 237 * ide_dev_read_id - send ATA/ATAPI IDENTIFY command 238 * @drive: drive to identify 239 * @cmd: command to use 240 * @id: buffer for IDENTIFY data 241 * 242 * Sends an ATA(PI) IDENTIFY request to a drive and waits for a response. 243 * 244 * Returns: 0 device was identified 245 * 1 device timed-out (no response to identify request) 246 * 2 device aborted the command (refused to identify itself) 247 */ 248 249int ide_dev_read_id(ide_drive_t *drive, u8 cmd, u16 *id) 250{ 251 ide_hwif_t *hwif = drive->hwif; 252 struct ide_io_ports *io_ports = &hwif->io_ports; 253 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 254 int use_altstatus = 0, rc; 255 unsigned long timeout; 256 u8 s = 0, a = 0; 257 258 /* 259 * Disable device IRQ. Otherwise we'll get spurious interrupts 260 * during the identify phase that the IRQ handler isn't expecting. 261 */ 262 if (io_ports->ctl_addr) 263 tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS); 264 265 /* take a deep breath */ 266 msleep(50); 267 268 if (io_ports->ctl_addr && 269 (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) { 270 a = tp_ops->read_altstatus(hwif); 271 s = tp_ops->read_status(hwif); 272 if ((a ^ s) & ~ATA_IDX) 273 /* ancient Seagate drives, broken interfaces */ 274 printk(KERN_INFO "%s: probing with STATUS(0x%02x) " 275 "instead of ALTSTATUS(0x%02x)\n", 276 drive->name, s, a); 277 else 278 /* use non-intrusive polling */ 279 use_altstatus = 1; 280 } 281 282 /* set features register for atapi 283 * identify command to be sure of reply 284 */ 285 if (cmd == ATA_CMD_ID_ATAPI) { 286 struct ide_taskfile tf; 287 288 memset(&tf, 0, sizeof(tf)); 289 /* disable DMA & overlap */ 290 tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE); 291 } 292 293 /* ask drive for ID */ 294 tp_ops->exec_command(hwif, cmd); 295 296 timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; 297 298 if (ide_busy_sleep(drive, timeout, use_altstatus)) 299 return 1; 300 301 /* wait for IRQ and ATA_DRQ */ 302 msleep(50); 303 s = tp_ops->read_status(hwif); 304 305 if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) { 306 /* drive returned ID */ 307 do_identify(drive, cmd, id); 308 /* drive responded with ID */ 309 rc = 0; 310 /* clear drive IRQ */ 311 (void)tp_ops->read_status(hwif); 312 } else { 313 /* drive refused ID */ 314 rc = 2; 315 } 316 return rc; 317} 318 319int ide_busy_sleep(ide_drive_t *drive, unsigned long timeout, int altstatus) 320{ 321 ide_hwif_t *hwif = drive->hwif; 322 u8 stat; 323 324 timeout += jiffies; 325 326 do { 327 msleep(50); /* give drive a breather */ 328 stat = altstatus ? hwif->tp_ops->read_altstatus(hwif) 329 : hwif->tp_ops->read_status(hwif); 330 if ((stat & ATA_BUSY) == 0) 331 return 0; 332 } while (time_before(jiffies, timeout)); 333 334 printk(KERN_ERR "%s: timeout in %s\n", drive->name, __func__); 335 336 return 1; /* drive timed-out */ 337} 338 339static u8 ide_read_device(ide_drive_t *drive) 340{ 341 struct ide_taskfile tf; 342 343 drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_DEVICE); 344 345 return tf.device; 346} 347 348/** 349 * do_probe - probe an IDE device 350 * @drive: drive to probe 351 * @cmd: command to use 352 * 353 * do_probe() has the difficult job of finding a drive if it exists, 354 * without getting hung up if it doesn't exist, without trampling on 355 * ethernet cards, and without leaving any IRQs dangling to haunt us later. 356 * 357 * If a drive is "known" to exist (from CMOS or kernel parameters), 358 * but does not respond right away, the probe will "hang in there" 359 * for the maximum wait time (about 30 seconds), otherwise it will 360 * exit much more quickly. 361 * 362 * Returns: 0 device was identified 363 * 1 device timed-out (no response to identify request) 364 * 2 device aborted the command (refused to identify itself) 365 * 3 bad status from device (possible for ATAPI drives) 366 * 4 probe was not attempted because failure was obvious 367 */ 368 369static int do_probe (ide_drive_t *drive, u8 cmd) 370{ 371 ide_hwif_t *hwif = drive->hwif; 372 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 373 u16 *id = drive->id; 374 int rc; 375 u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat; 376 377 /* avoid waiting for inappropriate probes */ 378 if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA) 379 return 4; 380 381#ifdef DEBUG 382 printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", 383 drive->name, present, drive->media, 384 (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI"); 385#endif 386 387 /* needed for some systems 388 * (e.g. crw9624 as drive0 with disk as slave) 389 */ 390 msleep(50); 391 tp_ops->dev_select(drive); 392 msleep(50); 393 394 if (ide_read_device(drive) != drive->select && present == 0) { 395 if (drive->dn & 1) { 396 /* exit with drive0 selected */ 397 tp_ops->dev_select(hwif->devices[0]); 398 /* allow ATA_BUSY to assert & clear */ 399 msleep(50); 400 } 401 /* no i/f present: mmm.. this should be a 4 -ml */ 402 return 3; 403 } 404 405 stat = tp_ops->read_status(hwif); 406 407 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) || 408 present || cmd == ATA_CMD_ID_ATAPI) { 409 rc = ide_dev_read_id(drive, cmd, id); 410 if (rc) 411 /* failed: try again */ 412 rc = ide_dev_read_id(drive, cmd, id); 413 414 stat = tp_ops->read_status(hwif); 415 416 if (stat == (ATA_BUSY | ATA_DRDY)) 417 return 4; 418 419 if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) { 420 printk(KERN_ERR "%s: no response (status = 0x%02x), " 421 "resetting drive\n", drive->name, stat); 422 msleep(50); 423 tp_ops->dev_select(drive); 424 msleep(50); 425 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); 426 (void)ide_busy_sleep(drive, WAIT_WORSTCASE, 0); 427 rc = ide_dev_read_id(drive, cmd, id); 428 } 429 430 /* ensure drive IRQ is clear */ 431 stat = tp_ops->read_status(hwif); 432 433 if (rc == 1) 434 printk(KERN_ERR "%s: no response (status = 0x%02x)\n", 435 drive->name, stat); 436 } else { 437 /* not present or maybe ATAPI */ 438 rc = 3; 439 } 440 if (drive->dn & 1) { 441 /* exit with drive0 selected */ 442 tp_ops->dev_select(hwif->devices[0]); 443 msleep(50); 444 /* ensure drive irq is clear */ 445 (void)tp_ops->read_status(hwif); 446 } 447 return rc; 448} 449 450/** 451 * probe_for_drives - upper level drive probe 452 * @drive: drive to probe for 453 * 454 * probe_for_drive() tests for existence of a given drive using do_probe() 455 * and presents things to the user as needed. 456 * 457 * Returns: 0 no device was found 458 * 1 device was found 459 * (note: IDE_DFLAG_PRESENT might still be not set) 460 */ 461 462static u8 probe_for_drive(ide_drive_t *drive) 463{ 464 char *m; 465 int rc; 466 u8 cmd; 467 468 drive->dev_flags &= ~IDE_DFLAG_ID_READ; 469 470 m = (char *)&drive->id[ATA_ID_PROD]; 471 strcpy(m, "UNKNOWN"); 472 473 /* skip probing? */ 474 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) { 475 /* if !(success||timed-out) */ 476 cmd = ATA_CMD_ID_ATA; 477 rc = do_probe(drive, cmd); 478 if (rc >= 2) { 479 /* look for ATAPI device */ 480 cmd = ATA_CMD_ID_ATAPI; 481 rc = do_probe(drive, cmd); 482 } 483 484 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 485 return 0; 486 487 /* identification failed? */ 488 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { 489 if (drive->media == ide_disk) { 490 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", 491 drive->name, drive->cyl, 492 drive->head, drive->sect); 493 } else if (drive->media == ide_cdrom) { 494 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); 495 } else { 496 /* nuke it */ 497 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); 498 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 499 } 500 } else { 501 if (cmd == ATA_CMD_ID_ATAPI) 502 ide_classify_atapi_dev(drive); 503 else 504 ide_classify_ata_dev(drive); 505 } 506 } 507 508 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 509 return 0; 510 511 /* The drive wasn't being helpful. Add generic info only */ 512 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { 513 generic_id(drive); 514 return 1; 515 } 516 517 if (drive->media == ide_disk) { 518 ide_disk_init_chs(drive); 519 ide_disk_init_mult_count(drive); 520 } 521 522 return 1; 523} 524 525static void hwif_release_dev(struct device *dev) 526{ 527 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); 528 529 complete(&hwif->gendev_rel_comp); 530} 531 532static int ide_register_port(ide_hwif_t *hwif) 533{ 534 int ret; 535 536 /* register with global device tree */ 537 dev_set_name(&hwif->gendev, hwif->name); 538 dev_set_drvdata(&hwif->gendev, hwif); 539 if (hwif->gendev.parent == NULL) 540 hwif->gendev.parent = hwif->dev; 541 hwif->gendev.release = hwif_release_dev; 542 543 ret = device_register(&hwif->gendev); 544 if (ret < 0) { 545 printk(KERN_WARNING "IDE: %s: device_register error: %d\n", 546 __func__, ret); 547 goto out; 548 } 549 550 hwif->portdev = device_create(ide_port_class, &hwif->gendev, 551 MKDEV(0, 0), hwif, hwif->name); 552 if (IS_ERR(hwif->portdev)) { 553 ret = PTR_ERR(hwif->portdev); 554 device_unregister(&hwif->gendev); 555 } 556out: 557 return ret; 558} 559 560/** 561 * ide_port_wait_ready - wait for port to become ready 562 * @hwif: IDE port 563 * 564 * This is needed on some PPCs and a bunch of BIOS-less embedded 565 * platforms. Typical cases are: 566 * 567 * - The firmware hard reset the disk before booting the kernel, 568 * the drive is still doing it's poweron-reset sequence, that 569 * can take up to 30 seconds. 570 * 571 * - The firmware does nothing (or no firmware), the device is 572 * still in POST state (same as above actually). 573 * 574 * - Some CD/DVD/Writer combo drives tend to drive the bus during 575 * their reset sequence even when they are non-selected slave 576 * devices, thus preventing discovery of the main HD. 577 * 578 * Doing this wait-for-non-busy should not harm any existing 579 * configuration and fix some issues like the above. 580 * 581 * BenH. 582 * 583 * Returns 0 on success, error code (< 0) otherwise. 584 */ 585 586static int ide_port_wait_ready(ide_hwif_t *hwif) 587{ 588 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 589 ide_drive_t *drive; 590 int i, rc; 591 592 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); 593 594 /* Let HW settle down a bit from whatever init state we 595 * come from */ 596 mdelay(2); 597 598 /* Wait for BSY bit to go away, spec timeout is 30 seconds, 599 * I know of at least one disk who takes 31 seconds, I use 35 600 * here to be safe 601 */ 602 rc = ide_wait_not_busy(hwif, 35000); 603 if (rc) 604 return rc; 605 606 /* Now make sure both master & slave are ready */ 607 ide_port_for_each_dev(i, drive, hwif) { 608 /* Ignore disks that we will not probe for later. */ 609 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 || 610 (drive->dev_flags & IDE_DFLAG_PRESENT)) { 611 tp_ops->dev_select(drive); 612 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); 613 mdelay(2); 614 rc = ide_wait_not_busy(hwif, 35000); 615 if (rc) 616 goto out; 617 } else 618 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", 619 drive->name); 620 } 621out: 622 /* Exit function with master reselected (let's be sane) */ 623 if (i) 624 tp_ops->dev_select(hwif->devices[0]); 625 626 return rc; 627} 628 629/** 630 * ide_undecoded_slave - look for bad CF adapters 631 * @dev1: slave device 632 * 633 * Analyse the drives on the interface and attempt to decide if we 634 * have the same drive viewed twice. This occurs with crap CF adapters 635 * and PCMCIA sometimes. 636 */ 637 638void ide_undecoded_slave(ide_drive_t *dev1) 639{ 640 ide_drive_t *dev0 = dev1->hwif->devices[0]; 641 642 if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0) 643 return; 644 645 /* If the models don't match they are not the same product */ 646 if (strcmp((char *)&dev0->id[ATA_ID_PROD], 647 (char *)&dev1->id[ATA_ID_PROD])) 648 return; 649 650 /* Serial numbers do not match */ 651 if (strncmp((char *)&dev0->id[ATA_ID_SERNO], 652 (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN)) 653 return; 654 655 /* No serial number, thankfully very rare for CF */ 656 if (*(char *)&dev0->id[ATA_ID_SERNO] == 0) 657 return; 658 659 /* Appears to be an IDE flash adapter with decode bugs */ 660 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); 661 662 dev1->dev_flags &= ~IDE_DFLAG_PRESENT; 663} 664 665EXPORT_SYMBOL_GPL(ide_undecoded_slave); 666 667static int ide_probe_port(ide_hwif_t *hwif) 668{ 669 ide_drive_t *drive; 670 unsigned int irqd; 671 int i, rc = -ENODEV; 672 673 BUG_ON(hwif->present); 674 675 if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) && 676 (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE)) 677 return -EACCES; 678 679 /* 680 * We must always disable IRQ, as probe_for_drive will assert IRQ, but 681 * we'll install our IRQ driver much later... 682 */ 683 irqd = hwif->irq; 684 if (irqd) 685 disable_irq(hwif->irq); 686 687 rc = ide_port_wait_ready(hwif); 688 if (rc == -ENODEV) { 689 printk(KERN_INFO "%s: no devices on the port\n", hwif->name); 690 goto out; 691 } else if (rc == -EBUSY) 692 printk(KERN_ERR "%s: not ready before the probe\n", hwif->name); 693 else 694 rc = -ENODEV; 695 696 /* 697 * Second drive should only exist if first drive was found, 698 * but a lot of cdrom drives are configured as single slaves. 699 */ 700 ide_port_for_each_dev(i, drive, hwif) { 701 (void) probe_for_drive(drive); 702 if (drive->dev_flags & IDE_DFLAG_PRESENT) 703 rc = 0; 704 } 705out: 706 /* 707 * Use cached IRQ number. It might be (and is...) changed by probe 708 * code above 709 */ 710 if (irqd) 711 enable_irq(irqd); 712 713 return rc; 714} 715 716static void ide_port_tune_devices(ide_hwif_t *hwif) 717{ 718 const struct ide_port_ops *port_ops = hwif->port_ops; 719 ide_drive_t *drive; 720 int i; 721 722 ide_port_for_each_present_dev(i, drive, hwif) { 723 ide_check_nien_quirk_list(drive); 724 725 if (port_ops && port_ops->quirkproc) 726 port_ops->quirkproc(drive); 727 } 728 729 ide_port_for_each_present_dev(i, drive, hwif) { 730 ide_set_max_pio(drive); 731 732 drive->dev_flags |= IDE_DFLAG_NICE1; 733 734 if (hwif->dma_ops) 735 ide_set_dma(drive); 736 } 737} 738 739/* 740 * init request queue 741 */ 742static int ide_init_queue(ide_drive_t *drive) 743{ 744 struct request_queue *q; 745 ide_hwif_t *hwif = drive->hwif; 746 int max_sectors = 256; 747 int max_sg_entries = PRD_ENTRIES; 748 749 /* 750 * Our default set up assumes the normal IDE case, 751 * that is 64K segmenting, standard PRD setup 752 * and LBA28. Some drivers then impose their own 753 * limits and LBA48 we could raise it but as yet 754 * do not. 755 */ 756 757 q = blk_init_queue_node(do_ide_request, NULL, hwif_to_node(hwif)); 758 if (!q) 759 return 1; 760 761 q->queuedata = drive; 762 blk_queue_segment_boundary(q, 0xffff); 763 764 if (hwif->rqsize < max_sectors) 765 max_sectors = hwif->rqsize; 766 blk_queue_max_sectors(q, max_sectors); 767 768#ifdef CONFIG_PCI 769 /* When we have an IOMMU, we may have a problem where pci_map_sg() 770 * creates segments that don't completely match our boundary 771 * requirements and thus need to be broken up again. Because it 772 * doesn't align properly either, we may actually have to break up 773 * to more segments than what was we got in the first place, a max 774 * worst case is twice as many. 775 * This will be fixed once we teach pci_map_sg() about our boundary 776 * requirements, hopefully soon. *FIXME* 777 */ 778 if (!PCI_DMA_BUS_IS_PHYS) 779 max_sg_entries >>= 1; 780#endif /* CONFIG_PCI */ 781 782 blk_queue_max_hw_segments(q, max_sg_entries); 783 blk_queue_max_phys_segments(q, max_sg_entries); 784 785 /* assign drive queue */ 786 drive->queue = q; 787 788 /* needs drive->queue to be set */ 789 ide_toggle_bounce(drive, 1); 790 791 return 0; 792} 793 794static DEFINE_MUTEX(ide_cfg_mtx); 795 796/* 797 * For any present drive: 798 * - allocate the block device queue 799 */ 800static int ide_port_setup_devices(ide_hwif_t *hwif) 801{ 802 ide_drive_t *drive; 803 int i, j = 0; 804 805 mutex_lock(&ide_cfg_mtx); 806 ide_port_for_each_present_dev(i, drive, hwif) { 807 if (ide_init_queue(drive)) { 808 printk(KERN_ERR "ide: failed to init %s\n", 809 drive->name); 810 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 811 continue; 812 } 813 814 j++; 815 } 816 mutex_unlock(&ide_cfg_mtx); 817 818 return j; 819} 820 821/* 822 * This routine sets up the IRQ for an IDE interface. 823 */ 824static int init_irq (ide_hwif_t *hwif) 825{ 826 struct ide_io_ports *io_ports = &hwif->io_ports; 827 struct ide_host *host = hwif->host; 828 irq_handler_t irq_handler = host->irq_handler; 829 int sa = host->irq_flags; 830 831 if (irq_handler == NULL) 832 irq_handler = ide_intr; 833 834 if (io_ports->ctl_addr) 835 hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); 836 837 if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif)) 838 goto out_up; 839 840#if !defined(__mc68000__) 841 printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 842 io_ports->data_addr, io_ports->status_addr, 843 io_ports->ctl_addr, hwif->irq); 844#else 845 printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, 846 io_ports->data_addr, hwif->irq); 847#endif /* __mc68000__ */ 848 if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE) 849 printk(KERN_CONT " (serialized)"); 850 printk(KERN_CONT "\n"); 851 852 return 0; 853out_up: 854 return 1; 855} 856 857static int ata_lock(dev_t dev, void *data) 858{ 859 /* FIXME: we want to pin hwif down */ 860 return 0; 861} 862 863static struct kobject *ata_probe(dev_t dev, int *part, void *data) 864{ 865 ide_hwif_t *hwif = data; 866 int unit = *part >> PARTN_BITS; 867 ide_drive_t *drive = hwif->devices[unit]; 868 869 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 870 return NULL; 871 872 if (drive->media == ide_disk) 873 request_module("ide-disk"); 874 if (drive->media == ide_cdrom || drive->media == ide_optical) 875 request_module("ide-cd"); 876 if (drive->media == ide_tape) 877 request_module("ide-tape"); 878 if (drive->media == ide_floppy) 879 request_module("ide-floppy"); 880 881 return NULL; 882} 883 884static struct kobject *exact_match(dev_t dev, int *part, void *data) 885{ 886 struct gendisk *p = data; 887 *part &= (1 << PARTN_BITS) - 1; 888 return &disk_to_dev(p)->kobj; 889} 890 891static int exact_lock(dev_t dev, void *data) 892{ 893 struct gendisk *p = data; 894 895 if (!get_disk(p)) 896 return -1; 897 return 0; 898} 899 900void ide_register_region(struct gendisk *disk) 901{ 902 blk_register_region(MKDEV(disk->major, disk->first_minor), 903 disk->minors, NULL, exact_match, exact_lock, disk); 904} 905 906EXPORT_SYMBOL_GPL(ide_register_region); 907 908void ide_unregister_region(struct gendisk *disk) 909{ 910 blk_unregister_region(MKDEV(disk->major, disk->first_minor), 911 disk->minors); 912} 913 914EXPORT_SYMBOL_GPL(ide_unregister_region); 915 916void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) 917{ 918 ide_hwif_t *hwif = drive->hwif; 919 unsigned int unit = drive->dn & 1; 920 921 disk->major = hwif->major; 922 disk->first_minor = unit << PARTN_BITS; 923 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); 924 disk->queue = drive->queue; 925} 926 927EXPORT_SYMBOL_GPL(ide_init_disk); 928 929static void drive_release_dev (struct device *dev) 930{ 931 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); 932 933 ide_proc_unregister_device(drive); 934 935 blk_cleanup_queue(drive->queue); 936 drive->queue = NULL; 937 938 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 939 940 complete(&drive->gendev_rel_comp); 941} 942 943static int hwif_init(ide_hwif_t *hwif) 944{ 945 if (!hwif->irq) { 946 printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); 947 return 0; 948 } 949 950 if (register_blkdev(hwif->major, hwif->name)) 951 return 0; 952 953 if (!hwif->sg_max_nents) 954 hwif->sg_max_nents = PRD_ENTRIES; 955 956 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 957 GFP_KERNEL); 958 if (!hwif->sg_table) { 959 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 960 goto out; 961 } 962 963 sg_init_table(hwif->sg_table, hwif->sg_max_nents); 964 965 if (init_irq(hwif)) { 966 printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", 967 hwif->name, hwif->irq); 968 goto out; 969 } 970 971 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 972 THIS_MODULE, ata_probe, ata_lock, hwif); 973 return 1; 974 975out: 976 unregister_blkdev(hwif->major, hwif->name); 977 return 0; 978} 979 980static void hwif_register_devices(ide_hwif_t *hwif) 981{ 982 ide_drive_t *drive; 983 unsigned int i; 984 985 ide_port_for_each_present_dev(i, drive, hwif) { 986 struct device *dev = &drive->gendev; 987 int ret; 988 989 dev_set_name(dev, "%u.%u", hwif->index, i); 990 dev_set_drvdata(dev, drive); 991 dev->parent = &hwif->gendev; 992 dev->bus = &ide_bus_type; 993 dev->release = drive_release_dev; 994 995 ret = device_register(dev); 996 if (ret < 0) 997 printk(KERN_WARNING "IDE: %s: device_register error: " 998 "%d\n", __func__, ret); 999 } 1000} 1001 1002static void ide_port_init_devices(ide_hwif_t *hwif) 1003{ 1004 const struct ide_port_ops *port_ops = hwif->port_ops; 1005 ide_drive_t *drive; 1006 int i; 1007 1008 ide_port_for_each_dev(i, drive, hwif) { 1009 drive->dn = i + hwif->channel * 2; 1010 1011 if (hwif->host_flags & IDE_HFLAG_IO_32BIT) 1012 drive->io_32bit = 1; 1013 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) 1014 drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; 1015 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) 1016 drive->dev_flags |= IDE_DFLAG_UNMASK; 1017 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) 1018 drive->dev_flags |= IDE_DFLAG_NO_UNMASK; 1019 1020 if (port_ops && port_ops->init_dev) 1021 port_ops->init_dev(drive); 1022 } 1023 1024 ide_port_for_each_dev(i, drive, hwif) { 1025 /* 1026 * default to PIO Mode 0 before we figure out 1027 * the most suited mode for the attached device 1028 */ 1029 if (port_ops && port_ops->set_pio_mode) 1030 port_ops->set_pio_mode(drive, 0); 1031 } 1032} 1033 1034static void ide_init_port(ide_hwif_t *hwif, unsigned int port, 1035 const struct ide_port_info *d) 1036{ 1037 hwif->channel = port; 1038 1039 hwif->chipset = d->chipset ? d->chipset : ide_pci; 1040 1041 if (d->init_iops) 1042 d->init_iops(hwif); 1043 1044 /* ->host_flags may be set by ->init_iops (or even earlier...) */ 1045 hwif->host_flags |= d->host_flags; 1046 hwif->pio_mask = d->pio_mask; 1047 1048 if (d->tp_ops) 1049 hwif->tp_ops = d->tp_ops; 1050 1051 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ 1052 if ((hwif->host_flags & IDE_HFLAG_DTC2278) == 0 || hwif->channel == 0) 1053 hwif->port_ops = d->port_ops; 1054 1055 hwif->swdma_mask = d->swdma_mask; 1056 hwif->mwdma_mask = d->mwdma_mask; 1057 hwif->ultra_mask = d->udma_mask; 1058 1059 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { 1060 int rc; 1061 1062 hwif->dma_ops = d->dma_ops; 1063 1064 if (d->init_dma) 1065 rc = d->init_dma(hwif, d); 1066 else 1067 rc = ide_hwif_setup_dma(hwif, d); 1068 1069 if (rc < 0) { 1070 printk(KERN_INFO "%s: DMA disabled\n", hwif->name); 1071 1072 hwif->dma_ops = NULL; 1073 hwif->dma_base = 0; 1074 hwif->swdma_mask = 0; 1075 hwif->mwdma_mask = 0; 1076 hwif->ultra_mask = 0; 1077 } 1078 } 1079 1080 if ((d->host_flags & IDE_HFLAG_SERIALIZE) || 1081 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) 1082 hwif->host->host_flags |= IDE_HFLAG_SERIALIZE; 1083 1084 if (d->max_sectors) 1085 hwif->rqsize = d->max_sectors; 1086 else { 1087 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || 1088 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) 1089 hwif->rqsize = 256; 1090 else 1091 hwif->rqsize = 65536; 1092 } 1093 1094 /* call chipset specific routine for each enabled port */ 1095 if (d->init_hwif) 1096 d->init_hwif(hwif); 1097} 1098 1099static void ide_port_cable_detect(ide_hwif_t *hwif) 1100{ 1101 const struct ide_port_ops *port_ops = hwif->port_ops; 1102 1103 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { 1104 if (hwif->cbl != ATA_CBL_PATA40_SHORT) 1105 hwif->cbl = port_ops->cable_detect(hwif); 1106 } 1107} 1108 1109static const u8 ide_hwif_to_major[] = 1110 { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR, 1111 IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR }; 1112 1113static void ide_port_init_devices_data(ide_hwif_t *hwif) 1114{ 1115 ide_drive_t *drive; 1116 int i; 1117 1118 ide_port_for_each_dev(i, drive, hwif) { 1119 u8 j = (hwif->index * MAX_DRIVES) + i; 1120 u16 *saved_id = drive->id; 1121 1122 memset(drive, 0, sizeof(*drive)); 1123 memset(saved_id, 0, SECTOR_SIZE); 1124 drive->id = saved_id; 1125 1126 drive->media = ide_disk; 1127 drive->select = (i << 4) | ATA_DEVICE_OBS; 1128 drive->hwif = hwif; 1129 drive->ready_stat = ATA_DRDY; 1130 drive->bad_wstat = BAD_W_STAT; 1131 drive->special_flags = IDE_SFLAG_RECALIBRATE | 1132 IDE_SFLAG_SET_GEOMETRY; 1133 drive->name[0] = 'h'; 1134 drive->name[1] = 'd'; 1135 drive->name[2] = 'a' + j; 1136 drive->max_failures = IDE_DEFAULT_MAX_FAILURES; 1137 1138 INIT_LIST_HEAD(&drive->list); 1139 init_completion(&drive->gendev_rel_comp); 1140 } 1141} 1142 1143static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) 1144{ 1145 /* fill in any non-zero initial values */ 1146 hwif->index = index; 1147 hwif->major = ide_hwif_to_major[index]; 1148 1149 hwif->name[0] = 'i'; 1150 hwif->name[1] = 'd'; 1151 hwif->name[2] = 'e'; 1152 hwif->name[3] = '0' + index; 1153 1154 spin_lock_init(&hwif->lock); 1155 1156 init_timer(&hwif->timer); 1157 hwif->timer.function = &ide_timer_expiry; 1158 hwif->timer.data = (unsigned long)hwif; 1159 1160 init_completion(&hwif->gendev_rel_comp); 1161 1162 hwif->tp_ops = &default_tp_ops; 1163 1164 ide_port_init_devices_data(hwif); 1165} 1166 1167static void ide_init_port_hw(ide_hwif_t *hwif, struct ide_hw *hw) 1168{ 1169 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); 1170 hwif->irq = hw->irq; 1171 hwif->dev = hw->dev; 1172 hwif->gendev.parent = hw->parent ? hw->parent : hw->dev; 1173 hwif->ack_intr = hw->ack_intr; 1174 hwif->config_data = hw->config; 1175} 1176 1177static unsigned int ide_indexes; 1178 1179/** 1180 * ide_find_port_slot - find free port slot 1181 * @d: IDE port info 1182 * 1183 * Return the new port slot index or -ENOENT if we are out of free slots. 1184 */ 1185 1186static int ide_find_port_slot(const struct ide_port_info *d) 1187{ 1188 int idx = -ENOENT; 1189 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; 1190 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; 1191 1192 /* 1193 * Claim an unassigned slot. 1194 * 1195 * Give preference to claiming other slots before claiming ide0/ide1, 1196 * just in case there's another interface yet-to-be-scanned 1197 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). 1198 * 1199 * Unless there is a bootable card that does not use the standard 1200 * ports 0x1f0/0x170 (the ide0/ide1 defaults). 1201 */ 1202 mutex_lock(&ide_cfg_mtx); 1203 if (bootable) { 1204 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) 1205 idx = ffz(ide_indexes | i); 1206 } else { 1207 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) 1208 idx = ffz(ide_indexes | 3); 1209 else if ((ide_indexes & 3) != 3) 1210 idx = ffz(ide_indexes); 1211 } 1212 if (idx >= 0) 1213 ide_indexes |= (1 << idx); 1214 mutex_unlock(&ide_cfg_mtx); 1215 1216 return idx; 1217} 1218 1219static void ide_free_port_slot(int idx) 1220{ 1221 mutex_lock(&ide_cfg_mtx); 1222 ide_indexes &= ~(1 << idx); 1223 mutex_unlock(&ide_cfg_mtx); 1224} 1225 1226static void ide_port_free_devices(ide_hwif_t *hwif) 1227{ 1228 ide_drive_t *drive; 1229 int i; 1230 1231 ide_port_for_each_dev(i, drive, hwif) { 1232 kfree(drive->id); 1233 kfree(drive); 1234 } 1235} 1236 1237static int ide_port_alloc_devices(ide_hwif_t *hwif, int node) 1238{ 1239 int i; 1240 1241 for (i = 0; i < MAX_DRIVES; i++) { 1242 ide_drive_t *drive; 1243 1244 drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node); 1245 if (drive == NULL) 1246 goto out_nomem; 1247 1248 /* 1249 * In order to keep things simple we have an id 1250 * block for all drives at all times. If the device 1251 * is pre ATA or refuses ATA/ATAPI identify we 1252 * will add faked data to this. 1253 * 1254 * Also note that 0 everywhere means "can't do X" 1255 */ 1256 drive->id = kzalloc_node(SECTOR_SIZE, GFP_KERNEL, node); 1257 if (drive->id == NULL) 1258 goto out_nomem; 1259 1260 hwif->devices[i] = drive; 1261 } 1262 return 0; 1263 1264out_nomem: 1265 ide_port_free_devices(hwif); 1266 return -ENOMEM; 1267} 1268 1269struct ide_host *ide_host_alloc(const struct ide_port_info *d, 1270 struct ide_hw **hws, unsigned int n_ports) 1271{ 1272 struct ide_host *host; 1273 struct device *dev = hws[0] ? hws[0]->dev : NULL; 1274 int node = dev ? dev_to_node(dev) : -1; 1275 int i; 1276 1277 host = kzalloc_node(sizeof(*host), GFP_KERNEL, node); 1278 if (host == NULL) 1279 return NULL; 1280 1281 for (i = 0; i < n_ports; i++) { 1282 ide_hwif_t *hwif; 1283 int idx; 1284 1285 if (hws[i] == NULL) 1286 continue; 1287 1288 hwif = kzalloc_node(sizeof(*hwif), GFP_KERNEL, node); 1289 if (hwif == NULL) 1290 continue; 1291 1292 if (ide_port_alloc_devices(hwif, node) < 0) { 1293 kfree(hwif); 1294 continue; 1295 } 1296 1297 idx = ide_find_port_slot(d); 1298 if (idx < 0) { 1299 printk(KERN_ERR "%s: no free slot for interface\n", 1300 d ? d->name : "ide"); 1301 ide_port_free_devices(hwif); 1302 kfree(hwif); 1303 continue; 1304 } 1305 1306 ide_init_port_data(hwif, idx); 1307 1308 hwif->host = host; 1309 1310 host->ports[i] = hwif; 1311 host->n_ports++; 1312 } 1313 1314 if (host->n_ports == 0) { 1315 kfree(host); 1316 return NULL; 1317 } 1318 1319 host->dev[0] = dev; 1320 1321 if (d) { 1322 host->init_chipset = d->init_chipset; 1323 host->get_lock = d->get_lock; 1324 host->release_lock = d->release_lock; 1325 host->host_flags = d->host_flags; 1326 host->irq_flags = d->irq_flags; 1327 } 1328 1329 return host; 1330} 1331EXPORT_SYMBOL_GPL(ide_host_alloc); 1332 1333static void ide_port_free(ide_hwif_t *hwif) 1334{ 1335 ide_port_free_devices(hwif); 1336 ide_free_port_slot(hwif->index); 1337 kfree(hwif); 1338} 1339 1340static void ide_disable_port(ide_hwif_t *hwif) 1341{ 1342 struct ide_host *host = hwif->host; 1343 int i; 1344 1345 printk(KERN_INFO "%s: disabling port\n", hwif->name); 1346 1347 for (i = 0; i < MAX_HOST_PORTS; i++) { 1348 if (host->ports[i] == hwif) { 1349 host->ports[i] = NULL; 1350 host->n_ports--; 1351 } 1352 } 1353 1354 ide_port_free(hwif); 1355} 1356 1357int ide_host_register(struct ide_host *host, const struct ide_port_info *d, 1358 struct ide_hw **hws) 1359{ 1360 ide_hwif_t *hwif, *mate = NULL; 1361 int i, j = 0; 1362 1363 ide_host_for_each_port(i, hwif, host) { 1364 if (hwif == NULL) { 1365 mate = NULL; 1366 continue; 1367 } 1368 1369 ide_init_port_hw(hwif, hws[i]); 1370 ide_port_apply_params(hwif); 1371 1372 if ((i & 1) && mate) { 1373 hwif->mate = mate; 1374 mate->mate = hwif; 1375 } 1376 1377 mate = (i & 1) ? NULL : hwif; 1378 1379 ide_init_port(hwif, i & 1, d); 1380 ide_port_cable_detect(hwif); 1381 ide_port_init_devices(hwif); 1382 } 1383 1384 ide_host_for_each_port(i, hwif, host) { 1385 if (hwif == NULL) 1386 continue; 1387 1388 if (ide_probe_port(hwif) == 0) 1389 hwif->present = 1; 1390 1391 if ((hwif->host_flags & IDE_HFLAG_4DRIVES) == 0 || 1392 hwif->mate == NULL || hwif->mate->present == 0) { 1393 if (ide_register_port(hwif)) { 1394 ide_disable_port(hwif); 1395 continue; 1396 } 1397 } 1398 1399 if (hwif->present) 1400 ide_port_tune_devices(hwif); 1401 } 1402 1403 ide_host_for_each_port(i, hwif, host) { 1404 if (hwif == NULL) 1405 continue; 1406 1407 if (hwif_init(hwif) == 0) { 1408 printk(KERN_INFO "%s: failed to initialize IDE " 1409 "interface\n", hwif->name); 1410 device_unregister(&hwif->gendev); 1411 ide_disable_port(hwif); 1412 continue; 1413 } 1414 1415 if (hwif->present) 1416 if (ide_port_setup_devices(hwif) == 0) { 1417 hwif->present = 0; 1418 continue; 1419 } 1420 1421 j++; 1422 1423 ide_acpi_init_port(hwif); 1424 1425 if (hwif->present) 1426 ide_acpi_port_init_devices(hwif); 1427 } 1428 1429 ide_host_for_each_port(i, hwif, host) { 1430 if (hwif == NULL) 1431 continue; 1432 1433 if (hwif->present) 1434 hwif_register_devices(hwif); 1435 } 1436 1437 ide_host_for_each_port(i, hwif, host) { 1438 if (hwif == NULL) 1439 continue; 1440 1441 ide_sysfs_register_port(hwif); 1442 ide_proc_register_port(hwif); 1443 1444 if (hwif->present) 1445 ide_proc_port_register_devices(hwif); 1446 } 1447 1448 return j ? 0 : -1; 1449} 1450EXPORT_SYMBOL_GPL(ide_host_register); 1451 1452int ide_host_add(const struct ide_port_info *d, struct ide_hw **hws, 1453 unsigned int n_ports, struct ide_host **hostp) 1454{ 1455 struct ide_host *host; 1456 int rc; 1457 1458 host = ide_host_alloc(d, hws, n_ports); 1459 if (host == NULL) 1460 return -ENOMEM; 1461 1462 rc = ide_host_register(host, d, hws); 1463 if (rc) { 1464 ide_host_free(host); 1465 return rc; 1466 } 1467 1468 if (hostp) 1469 *hostp = host; 1470 1471 return 0; 1472} 1473EXPORT_SYMBOL_GPL(ide_host_add); 1474 1475static void __ide_port_unregister_devices(ide_hwif_t *hwif) 1476{ 1477 ide_drive_t *drive; 1478 int i; 1479 1480 ide_port_for_each_present_dev(i, drive, hwif) { 1481 device_unregister(&drive->gendev); 1482 wait_for_completion(&drive->gendev_rel_comp); 1483 } 1484} 1485 1486void ide_port_unregister_devices(ide_hwif_t *hwif) 1487{ 1488 mutex_lock(&ide_cfg_mtx); 1489 __ide_port_unregister_devices(hwif); 1490 hwif->present = 0; 1491 ide_port_init_devices_data(hwif); 1492 mutex_unlock(&ide_cfg_mtx); 1493} 1494EXPORT_SYMBOL_GPL(ide_port_unregister_devices); 1495 1496/** 1497 * ide_unregister - free an IDE interface 1498 * @hwif: IDE interface 1499 * 1500 * Perform the final unregister of an IDE interface. 1501 * 1502 * Locking: 1503 * The caller must not hold the IDE locks. 1504 * 1505 * It is up to the caller to be sure there is no pending I/O here, 1506 * and that the interface will not be reopened (present/vanishing 1507 * locking isn't yet done BTW). 1508 */ 1509 1510static void ide_unregister(ide_hwif_t *hwif) 1511{ 1512 BUG_ON(in_interrupt()); 1513 BUG_ON(irqs_disabled()); 1514 1515 mutex_lock(&ide_cfg_mtx); 1516 1517 if (hwif->present) { 1518 __ide_port_unregister_devices(hwif); 1519 hwif->present = 0; 1520 } 1521 1522 ide_proc_unregister_port(hwif); 1523 1524 free_irq(hwif->irq, hwif); 1525 1526 device_unregister(hwif->portdev); 1527 device_unregister(&hwif->gendev); 1528 wait_for_completion(&hwif->gendev_rel_comp); 1529 1530 /* 1531 * Remove us from the kernel's knowledge 1532 */ 1533 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); 1534 kfree(hwif->sg_table); 1535 unregister_blkdev(hwif->major, hwif->name); 1536 1537 ide_release_dma_engine(hwif); 1538 1539 mutex_unlock(&ide_cfg_mtx); 1540} 1541 1542void ide_host_free(struct ide_host *host) 1543{ 1544 ide_hwif_t *hwif; 1545 int i; 1546 1547 ide_host_for_each_port(i, hwif, host) { 1548 if (hwif) 1549 ide_port_free(hwif); 1550 } 1551 1552 kfree(host); 1553} 1554EXPORT_SYMBOL_GPL(ide_host_free); 1555 1556void ide_host_remove(struct ide_host *host) 1557{ 1558 ide_hwif_t *hwif; 1559 int i; 1560 1561 ide_host_for_each_port(i, hwif, host) { 1562 if (hwif) 1563 ide_unregister(hwif); 1564 } 1565 1566 ide_host_free(host); 1567} 1568EXPORT_SYMBOL_GPL(ide_host_remove); 1569 1570void ide_port_scan(ide_hwif_t *hwif) 1571{ 1572 ide_port_apply_params(hwif); 1573 ide_port_cable_detect(hwif); 1574 ide_port_init_devices(hwif); 1575 1576 if (ide_probe_port(hwif) < 0) 1577 return; 1578 1579 hwif->present = 1; 1580 1581 ide_port_tune_devices(hwif); 1582 ide_port_setup_devices(hwif); 1583 ide_acpi_port_init_devices(hwif); 1584 hwif_register_devices(hwif); 1585 ide_proc_port_register_devices(hwif); 1586} 1587EXPORT_SYMBOL_GPL(ide_port_scan); 1588