1 /* 2 * libata-core.c - helper library for ATA 3 * 4 * Maintained by: Tejun Heo <tj@kernel.org> 5 * Please ALWAYS copy linux-ide@vger.kernel.org 6 * on emails. 7 * 8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved. 9 * Copyright 2003-2004 Jeff Garzik 10 * 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2, or (at your option) 15 * any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; see the file COPYING. If not, write to 24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 25 * 26 * 27 * libata documentation is available via 'make {ps|pdf}docs', 28 * as Documentation/DocBook/libata.* 29 * 30 * Hardware documentation available from http://www.t13.org/ and 31 * http://www.sata-io.org/ 32 * 33 * Standards documents from: 34 * http://www.t13.org (ATA standards, PCI DMA IDE spec) 35 * http://www.t10.org (SCSI MMC - for ATAPI MMC) 36 * http://www.sata-io.org (SATA) 37 * http://www.compactflash.org (CF) 38 * http://www.qic.org (QIC157 - Tape and DSC) 39 * http://www.ce-ata.org (CE-ATA: not supported) 40 * 41 */ 42 43 #include <linux/kernel.h> 44 #include <linux/module.h> 45 #include <linux/pci.h> 46 #include <linux/init.h> 47 #include <linux/list.h> 48 #include <linux/mm.h> 49 #include <linux/spinlock.h> 50 #include <linux/blkdev.h> 51 #include <linux/delay.h> 52 #include <linux/timer.h> 53 #include <linux/interrupt.h> 54 #include <linux/completion.h> 55 #include <linux/suspend.h> 56 #include <linux/workqueue.h> 57 #include <linux/scatterlist.h> 58 #include <linux/io.h> 59 #include <linux/async.h> 60 #include <linux/log2.h> 61 #include <linux/slab.h> 62 #include <linux/glob.h> 63 #include <scsi/scsi.h> 64 #include <scsi/scsi_cmnd.h> 65 #include <scsi/scsi_host.h> 66 #include <linux/libata.h> 67 #include <asm/byteorder.h> 68 #include <linux/cdrom.h> 69 #include <linux/ratelimit.h> 70 #include <linux/pm_runtime.h> 71 #include <linux/platform_device.h> 72 73 #define CREATE_TRACE_POINTS 74 #include <trace/events/libata.h> 75 76 #include "libata.h" 77 #include "libata-transport.h" 78 79 /* debounce timing parameters in msecs { interval, duration, timeout } */ 80 const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; 81 const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; 82 const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; 83 84 const struct ata_port_operations ata_base_port_ops = { 85 .prereset = ata_std_prereset, 86 .postreset = ata_std_postreset, 87 .error_handler = ata_std_error_handler, 88 .sched_eh = ata_std_sched_eh, 89 .end_eh = ata_std_end_eh, 90 }; 91 92 const struct ata_port_operations sata_port_ops = { 93 .inherits = &ata_base_port_ops, 94 95 .qc_defer = ata_std_qc_defer, 96 .hardreset = sata_std_hardreset, 97 }; 98 99 static unsigned int ata_dev_init_params(struct ata_device *dev, 100 u16 heads, u16 sectors); 101 static unsigned int ata_dev_set_xfermode(struct ata_device *dev); 102 static void ata_dev_xfermask(struct ata_device *dev); 103 static unsigned long ata_dev_blacklisted(const struct ata_device *dev); 104 105 atomic_t ata_print_id = ATOMIC_INIT(0); 106 107 struct ata_force_param { 108 const char *name; 109 unsigned int cbl; 110 int spd_limit; 111 unsigned long xfer_mask; 112 unsigned int horkage_on; 113 unsigned int horkage_off; 114 unsigned int lflags; 115 }; 116 117 struct ata_force_ent { 118 int port; 119 int device; 120 struct ata_force_param param; 121 }; 122 123 static struct ata_force_ent *ata_force_tbl; 124 static int ata_force_tbl_size; 125 126 static char ata_force_param_buf[PAGE_SIZE] __initdata; 127 /* param_buf is thrown away after initialization, disallow read */ 128 module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0); 129 MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)"); 130 131 static int atapi_enabled = 1; 132 module_param(atapi_enabled, int, 0444); 133 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])"); 134 135 static int atapi_dmadir = 0; 136 module_param(atapi_dmadir, int, 0444); 137 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)"); 138 139 int atapi_passthru16 = 1; 140 module_param(atapi_passthru16, int, 0444); 141 MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])"); 142 143 int libata_fua = 0; 144 module_param_named(fua, libata_fua, int, 0444); 145 MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)"); 146 147 static int ata_ignore_hpa; 148 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); 149 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); 150 151 static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; 152 module_param_named(dma, libata_dma_mask, int, 0444); 153 MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); 154 155 static int ata_probe_timeout; 156 module_param(ata_probe_timeout, int, 0444); 157 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); 158 159 int libata_noacpi = 0; 160 module_param_named(noacpi, libata_noacpi, int, 0444); 161 MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)"); 162 163 int libata_allow_tpm = 0; 164 module_param_named(allow_tpm, libata_allow_tpm, int, 0444); 165 MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)"); 166 167 static int atapi_an; 168 module_param(atapi_an, int, 0444); 169 MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)"); 170 171 MODULE_AUTHOR("Jeff Garzik"); 172 MODULE_DESCRIPTION("Library module for ATA devices"); 173 MODULE_LICENSE("GPL"); 174 MODULE_VERSION(DRV_VERSION); 175 176 177 static bool ata_sstatus_online(u32 sstatus) 178 { 179 return (sstatus & 0xf) == 0x3; 180 } 181 182 /** 183 * ata_link_next - link iteration helper 184 * @link: the previous link, NULL to start 185 * @ap: ATA port containing links to iterate 186 * @mode: iteration mode, one of ATA_LITER_* 187 * 188 * LOCKING: 189 * Host lock or EH context. 190 * 191 * RETURNS: 192 * Pointer to the next link. 193 */ 194 struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap, 195 enum ata_link_iter_mode mode) 196 { 197 BUG_ON(mode != ATA_LITER_EDGE && 198 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST); 199 200 /* NULL link indicates start of iteration */ 201 if (!link) 202 switch (mode) { 203 case ATA_LITER_EDGE: 204 case ATA_LITER_PMP_FIRST: 205 if (sata_pmp_attached(ap)) 206 return ap->pmp_link; 207 /* fall through */ 208 case ATA_LITER_HOST_FIRST: 209 return &ap->link; 210 } 211 212 /* we just iterated over the host link, what's next? */ 213 if (link == &ap->link) 214 switch (mode) { 215 case ATA_LITER_HOST_FIRST: 216 if (sata_pmp_attached(ap)) 217 return ap->pmp_link; 218 /* fall through */ 219 case ATA_LITER_PMP_FIRST: 220 if (unlikely(ap->slave_link)) 221 return ap->slave_link; 222 /* fall through */ 223 case ATA_LITER_EDGE: 224 return NULL; 225 } 226 227 /* slave_link excludes PMP */ 228 if (unlikely(link == ap->slave_link)) 229 return NULL; 230 231 /* we were over a PMP link */ 232 if (++link < ap->pmp_link + ap->nr_pmp_links) 233 return link; 234 235 if (mode == ATA_LITER_PMP_FIRST) 236 return &ap->link; 237 238 return NULL; 239 } 240 241 /** 242 * ata_dev_next - device iteration helper 243 * @dev: the previous device, NULL to start 244 * @link: ATA link containing devices to iterate 245 * @mode: iteration mode, one of ATA_DITER_* 246 * 247 * LOCKING: 248 * Host lock or EH context. 249 * 250 * RETURNS: 251 * Pointer to the next device. 252 */ 253 struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link, 254 enum ata_dev_iter_mode mode) 255 { 256 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE && 257 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE); 258 259 /* NULL dev indicates start of iteration */ 260 if (!dev) 261 switch (mode) { 262 case ATA_DITER_ENABLED: 263 case ATA_DITER_ALL: 264 dev = link->device; 265 goto check; 266 case ATA_DITER_ENABLED_REVERSE: 267 case ATA_DITER_ALL_REVERSE: 268 dev = link->device + ata_link_max_devices(link) - 1; 269 goto check; 270 } 271 272 next: 273 /* move to the next one */ 274 switch (mode) { 275 case ATA_DITER_ENABLED: 276 case ATA_DITER_ALL: 277 if (++dev < link->device + ata_link_max_devices(link)) 278 goto check; 279 return NULL; 280 case ATA_DITER_ENABLED_REVERSE: 281 case ATA_DITER_ALL_REVERSE: 282 if (--dev >= link->device) 283 goto check; 284 return NULL; 285 } 286 287 check: 288 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) && 289 !ata_dev_enabled(dev)) 290 goto next; 291 return dev; 292 } 293 294 /** 295 * ata_dev_phys_link - find physical link for a device 296 * @dev: ATA device to look up physical link for 297 * 298 * Look up physical link which @dev is attached to. Note that 299 * this is different from @dev->link only when @dev is on slave 300 * link. For all other cases, it's the same as @dev->link. 301 * 302 * LOCKING: 303 * Don't care. 304 * 305 * RETURNS: 306 * Pointer to the found physical link. 307 */ 308 struct ata_link *ata_dev_phys_link(struct ata_device *dev) 309 { 310 struct ata_port *ap = dev->link->ap; 311 312 if (!ap->slave_link) 313 return dev->link; 314 if (!dev->devno) 315 return &ap->link; 316 return ap->slave_link; 317 } 318 319 /** 320 * ata_force_cbl - force cable type according to libata.force 321 * @ap: ATA port of interest 322 * 323 * Force cable type according to libata.force and whine about it. 324 * The last entry which has matching port number is used, so it 325 * can be specified as part of device force parameters. For 326 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the 327 * same effect. 328 * 329 * LOCKING: 330 * EH context. 331 */ 332 void ata_force_cbl(struct ata_port *ap) 333 { 334 int i; 335 336 for (i = ata_force_tbl_size - 1; i >= 0; i--) { 337 const struct ata_force_ent *fe = &ata_force_tbl[i]; 338 339 if (fe->port != -1 && fe->port != ap->print_id) 340 continue; 341 342 if (fe->param.cbl == ATA_CBL_NONE) 343 continue; 344 345 ap->cbl = fe->param.cbl; 346 ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name); 347 return; 348 } 349 } 350 351 /** 352 * ata_force_link_limits - force link limits according to libata.force 353 * @link: ATA link of interest 354 * 355 * Force link flags and SATA spd limit according to libata.force 356 * and whine about it. When only the port part is specified 357 * (e.g. 1:), the limit applies to all links connected to both 358 * the host link and all fan-out ports connected via PMP. If the 359 * device part is specified as 0 (e.g. 1.00:), it specifies the 360 * first fan-out link not the host link. Device number 15 always 361 * points to the host link whether PMP is attached or not. If the 362 * controller has slave link, device number 16 points to it. 363 * 364 * LOCKING: 365 * EH context. 366 */ 367 static void ata_force_link_limits(struct ata_link *link) 368 { 369 bool did_spd = false; 370 int linkno = link->pmp; 371 int i; 372 373 if (ata_is_host_link(link)) 374 linkno += 15; 375 376 for (i = ata_force_tbl_size - 1; i >= 0; i--) { 377 const struct ata_force_ent *fe = &ata_force_tbl[i]; 378 379 if (fe->port != -1 && fe->port != link->ap->print_id) 380 continue; 381 382 if (fe->device != -1 && fe->device != linkno) 383 continue; 384 385 /* only honor the first spd limit */ 386 if (!did_spd && fe->param.spd_limit) { 387 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1; 388 ata_link_notice(link, "FORCE: PHY spd limit set to %s\n", 389 fe->param.name); 390 did_spd = true; 391 } 392 393 /* let lflags stack */ 394 if (fe->param.lflags) { 395 link->flags |= fe->param.lflags; 396 ata_link_notice(link, 397 "FORCE: link flag 0x%x forced -> 0x%x\n", 398 fe->param.lflags, link->flags); 399 } 400 } 401 } 402 403 /** 404 * ata_force_xfermask - force xfermask according to libata.force 405 * @dev: ATA device of interest 406 * 407 * Force xfer_mask according to libata.force and whine about it. 408 * For consistency with link selection, device number 15 selects 409 * the first device connected to the host link. 410 * 411 * LOCKING: 412 * EH context. 413 */ 414 static void ata_force_xfermask(struct ata_device *dev) 415 { 416 int devno = dev->link->pmp + dev->devno; 417 int alt_devno = devno; 418 int i; 419 420 /* allow n.15/16 for devices attached to host port */ 421 if (ata_is_host_link(dev->link)) 422 alt_devno += 15; 423 424 for (i = ata_force_tbl_size - 1; i >= 0; i--) { 425 const struct ata_force_ent *fe = &ata_force_tbl[i]; 426 unsigned long pio_mask, mwdma_mask, udma_mask; 427 428 if (fe->port != -1 && fe->port != dev->link->ap->print_id) 429 continue; 430 431 if (fe->device != -1 && fe->device != devno && 432 fe->device != alt_devno) 433 continue; 434 435 if (!fe->param.xfer_mask) 436 continue; 437 438 ata_unpack_xfermask(fe->param.xfer_mask, 439 &pio_mask, &mwdma_mask, &udma_mask); 440 if (udma_mask) 441 dev->udma_mask = udma_mask; 442 else if (mwdma_mask) { 443 dev->udma_mask = 0; 444 dev->mwdma_mask = mwdma_mask; 445 } else { 446 dev->udma_mask = 0; 447 dev->mwdma_mask = 0; 448 dev->pio_mask = pio_mask; 449 } 450 451 ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n", 452 fe->param.name); 453 return; 454 } 455 } 456 457 /** 458 * ata_force_horkage - force horkage according to libata.force 459 * @dev: ATA device of interest 460 * 461 * Force horkage according to libata.force and whine about it. 462 * For consistency with link selection, device number 15 selects 463 * the first device connected to the host link. 464 * 465 * LOCKING: 466 * EH context. 467 */ 468 static void ata_force_horkage(struct ata_device *dev) 469 { 470 int devno = dev->link->pmp + dev->devno; 471 int alt_devno = devno; 472 int i; 473 474 /* allow n.15/16 for devices attached to host port */ 475 if (ata_is_host_link(dev->link)) 476 alt_devno += 15; 477 478 for (i = 0; i < ata_force_tbl_size; i++) { 479 const struct ata_force_ent *fe = &ata_force_tbl[i]; 480 481 if (fe->port != -1 && fe->port != dev->link->ap->print_id) 482 continue; 483 484 if (fe->device != -1 && fe->device != devno && 485 fe->device != alt_devno) 486 continue; 487 488 if (!(~dev->horkage & fe->param.horkage_on) && 489 !(dev->horkage & fe->param.horkage_off)) 490 continue; 491 492 dev->horkage |= fe->param.horkage_on; 493 dev->horkage &= ~fe->param.horkage_off; 494 495 ata_dev_notice(dev, "FORCE: horkage modified (%s)\n", 496 fe->param.name); 497 } 498 } 499 500 /** 501 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode 502 * @opcode: SCSI opcode 503 * 504 * Determine ATAPI command type from @opcode. 505 * 506 * LOCKING: 507 * None. 508 * 509 * RETURNS: 510 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC} 511 */ 512 int atapi_cmd_type(u8 opcode) 513 { 514 switch (opcode) { 515 case GPCMD_READ_10: 516 case GPCMD_READ_12: 517 return ATAPI_READ; 518 519 case GPCMD_WRITE_10: 520 case GPCMD_WRITE_12: 521 case GPCMD_WRITE_AND_VERIFY_10: 522 return ATAPI_WRITE; 523 524 case GPCMD_READ_CD: 525 case GPCMD_READ_CD_MSF: 526 return ATAPI_READ_CD; 527 528 case ATA_16: 529 case ATA_12: 530 if (atapi_passthru16) 531 return ATAPI_PASS_THRU; 532 /* fall thru */ 533 default: 534 return ATAPI_MISC; 535 } 536 } 537 538 /** 539 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure 540 * @tf: Taskfile to convert 541 * @pmp: Port multiplier port 542 * @is_cmd: This FIS is for command 543 * @fis: Buffer into which data will output 544 * 545 * Converts a standard ATA taskfile to a Serial ATA 546 * FIS structure (Register - Host to Device). 547 * 548 * LOCKING: 549 * Inherited from caller. 550 */ 551 void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis) 552 { 553 fis[0] = 0x27; /* Register - Host to Device FIS */ 554 fis[1] = pmp & 0xf; /* Port multiplier number*/ 555 if (is_cmd) 556 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */ 557 558 fis[2] = tf->command; 559 fis[3] = tf->feature; 560 561 fis[4] = tf->lbal; 562 fis[5] = tf->lbam; 563 fis[6] = tf->lbah; 564 fis[7] = tf->device; 565 566 fis[8] = tf->hob_lbal; 567 fis[9] = tf->hob_lbam; 568 fis[10] = tf->hob_lbah; 569 fis[11] = tf->hob_feature; 570 571 fis[12] = tf->nsect; 572 fis[13] = tf->hob_nsect; 573 fis[14] = 0; 574 fis[15] = tf->ctl; 575 576 fis[16] = tf->auxiliary & 0xff; 577 fis[17] = (tf->auxiliary >> 8) & 0xff; 578 fis[18] = (tf->auxiliary >> 16) & 0xff; 579 fis[19] = (tf->auxiliary >> 24) & 0xff; 580 } 581 582 /** 583 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile 584 * @fis: Buffer from which data will be input 585 * @tf: Taskfile to output 586 * 587 * Converts a serial ATA FIS structure to a standard ATA taskfile. 588 * 589 * LOCKING: 590 * Inherited from caller. 591 */ 592 593 void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) 594 { 595 tf->command = fis[2]; /* status */ 596 tf->feature = fis[3]; /* error */ 597 598 tf->lbal = fis[4]; 599 tf->lbam = fis[5]; 600 tf->lbah = fis[6]; 601 tf->device = fis[7]; 602 603 tf->hob_lbal = fis[8]; 604 tf->hob_lbam = fis[9]; 605 tf->hob_lbah = fis[10]; 606 607 tf->nsect = fis[12]; 608 tf->hob_nsect = fis[13]; 609 } 610 611 static const u8 ata_rw_cmds[] = { 612 /* pio multi */ 613 ATA_CMD_READ_MULTI, 614 ATA_CMD_WRITE_MULTI, 615 ATA_CMD_READ_MULTI_EXT, 616 ATA_CMD_WRITE_MULTI_EXT, 617 0, 618 0, 619 0, 620 ATA_CMD_WRITE_MULTI_FUA_EXT, 621 /* pio */ 622 ATA_CMD_PIO_READ, 623 ATA_CMD_PIO_WRITE, 624 ATA_CMD_PIO_READ_EXT, 625 ATA_CMD_PIO_WRITE_EXT, 626 0, 627 0, 628 0, 629 0, 630 /* dma */ 631 ATA_CMD_READ, 632 ATA_CMD_WRITE, 633 ATA_CMD_READ_EXT, 634 ATA_CMD_WRITE_EXT, 635 0, 636 0, 637 0, 638 ATA_CMD_WRITE_FUA_EXT 639 }; 640 641 /** 642 * ata_rwcmd_protocol - set taskfile r/w commands and protocol 643 * @tf: command to examine and configure 644 * @dev: device tf belongs to 645 * 646 * Examine the device configuration and tf->flags to calculate 647 * the proper read/write commands and protocol to use. 648 * 649 * LOCKING: 650 * caller. 651 */ 652 static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) 653 { 654 u8 cmd; 655 656 int index, fua, lba48, write; 657 658 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; 659 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; 660 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; 661 662 if (dev->flags & ATA_DFLAG_PIO) { 663 tf->protocol = ATA_PROT_PIO; 664 index = dev->multi_count ? 0 : 8; 665 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { 666 /* Unable to use DMA due to host limitation */ 667 tf->protocol = ATA_PROT_PIO; 668 index = dev->multi_count ? 0 : 8; 669 } else { 670 tf->protocol = ATA_PROT_DMA; 671 index = 16; 672 } 673 674 cmd = ata_rw_cmds[index + fua + lba48 + write]; 675 if (cmd) { 676 tf->command = cmd; 677 return 0; 678 } 679 return -1; 680 } 681 682 /** 683 * ata_tf_read_block - Read block address from ATA taskfile 684 * @tf: ATA taskfile of interest 685 * @dev: ATA device @tf belongs to 686 * 687 * LOCKING: 688 * None. 689 * 690 * Read block address from @tf. This function can handle all 691 * three address formats - LBA, LBA48 and CHS. tf->protocol and 692 * flags select the address format to use. 693 * 694 * RETURNS: 695 * Block address read from @tf. 696 */ 697 u64 ata_tf_read_block(const struct ata_taskfile *tf, struct ata_device *dev) 698 { 699 u64 block = 0; 700 701 if (!dev || tf->flags & ATA_TFLAG_LBA) { 702 if (tf->flags & ATA_TFLAG_LBA48) { 703 block |= (u64)tf->hob_lbah << 40; 704 block |= (u64)tf->hob_lbam << 32; 705 block |= (u64)tf->hob_lbal << 24; 706 } else 707 block |= (tf->device & 0xf) << 24; 708 709 block |= tf->lbah << 16; 710 block |= tf->lbam << 8; 711 block |= tf->lbal; 712 } else { 713 u32 cyl, head, sect; 714 715 cyl = tf->lbam | (tf->lbah << 8); 716 head = tf->device & 0xf; 717 sect = tf->lbal; 718 719 if (!sect) { 720 ata_dev_warn(dev, 721 "device reported invalid CHS sector 0\n"); 722 sect = 1; /* oh well */ 723 } 724 725 block = (cyl * dev->heads + head) * dev->sectors + sect - 1; 726 } 727 728 return block; 729 } 730 731 /** 732 * ata_build_rw_tf - Build ATA taskfile for given read/write request 733 * @tf: Target ATA taskfile 734 * @dev: ATA device @tf belongs to 735 * @block: Block address 736 * @n_block: Number of blocks 737 * @tf_flags: RW/FUA etc... 738 * @tag: tag 739 * 740 * LOCKING: 741 * None. 742 * 743 * Build ATA taskfile @tf for read/write request described by 744 * @block, @n_block, @tf_flags and @tag on @dev. 745 * 746 * RETURNS: 747 * 748 * 0 on success, -ERANGE if the request is too large for @dev, 749 * -EINVAL if the request is invalid. 750 */ 751 int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, 752 u64 block, u32 n_block, unsigned int tf_flags, 753 unsigned int tag) 754 { 755 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 756 tf->flags |= tf_flags; 757 758 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { 759 /* yay, NCQ */ 760 if (!lba_48_ok(block, n_block)) 761 return -ERANGE; 762 763 tf->protocol = ATA_PROT_NCQ; 764 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; 765 766 if (tf->flags & ATA_TFLAG_WRITE) 767 tf->command = ATA_CMD_FPDMA_WRITE; 768 else 769 tf->command = ATA_CMD_FPDMA_READ; 770 771 tf->nsect = tag << 3; 772 tf->hob_feature = (n_block >> 8) & 0xff; 773 tf->feature = n_block & 0xff; 774 775 tf->hob_lbah = (block >> 40) & 0xff; 776 tf->hob_lbam = (block >> 32) & 0xff; 777 tf->hob_lbal = (block >> 24) & 0xff; 778 tf->lbah = (block >> 16) & 0xff; 779 tf->lbam = (block >> 8) & 0xff; 780 tf->lbal = block & 0xff; 781 782 tf->device = ATA_LBA; 783 if (tf->flags & ATA_TFLAG_FUA) 784 tf->device |= 1 << 7; 785 } else if (dev->flags & ATA_DFLAG_LBA) { 786 tf->flags |= ATA_TFLAG_LBA; 787 788 if (lba_28_ok(block, n_block)) { 789 /* use LBA28 */ 790 tf->device |= (block >> 24) & 0xf; 791 } else if (lba_48_ok(block, n_block)) { 792 if (!(dev->flags & ATA_DFLAG_LBA48)) 793 return -ERANGE; 794 795 /* use LBA48 */ 796 tf->flags |= ATA_TFLAG_LBA48; 797 798 tf->hob_nsect = (n_block >> 8) & 0xff; 799 800 tf->hob_lbah = (block >> 40) & 0xff; 801 tf->hob_lbam = (block >> 32) & 0xff; 802 tf->hob_lbal = (block >> 24) & 0xff; 803 } else 804 /* request too large even for LBA48 */ 805 return -ERANGE; 806 807 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 808 return -EINVAL; 809 810 tf->nsect = n_block & 0xff; 811 812 tf->lbah = (block >> 16) & 0xff; 813 tf->lbam = (block >> 8) & 0xff; 814 tf->lbal = block & 0xff; 815 816 tf->device |= ATA_LBA; 817 } else { 818 /* CHS */ 819 u32 sect, head, cyl, track; 820 821 /* The request -may- be too large for CHS addressing. */ 822 if (!lba_28_ok(block, n_block)) 823 return -ERANGE; 824 825 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) 826 return -EINVAL; 827 828 /* Convert LBA to CHS */ 829 track = (u32)block / dev->sectors; 830 cyl = track / dev->heads; 831 head = track % dev->heads; 832 sect = (u32)block % dev->sectors + 1; 833 834 DPRINTK("block %u track %u cyl %u head %u sect %u\n", 835 (u32)block, track, cyl, head, sect); 836 837 /* Check whether the converted CHS can fit. 838 Cylinder: 0-65535 839 Head: 0-15 840 Sector: 1-255*/ 841 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 842 return -ERANGE; 843 844 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 845 tf->lbal = sect; 846 tf->lbam = cyl; 847 tf->lbah = cyl >> 8; 848 tf->device |= head; 849 } 850 851 return 0; 852 } 853 854 /** 855 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask 856 * @pio_mask: pio_mask 857 * @mwdma_mask: mwdma_mask 858 * @udma_mask: udma_mask 859 * 860 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single 861 * unsigned int xfer_mask. 862 * 863 * LOCKING: 864 * None. 865 * 866 * RETURNS: 867 * Packed xfer_mask. 868 */ 869 unsigned long ata_pack_xfermask(unsigned long pio_mask, 870 unsigned long mwdma_mask, 871 unsigned long udma_mask) 872 { 873 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | 874 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | 875 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); 876 } 877 878 /** 879 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks 880 * @xfer_mask: xfer_mask to unpack 881 * @pio_mask: resulting pio_mask 882 * @mwdma_mask: resulting mwdma_mask 883 * @udma_mask: resulting udma_mask 884 * 885 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. 886 * Any NULL distination masks will be ignored. 887 */ 888 void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask, 889 unsigned long *mwdma_mask, unsigned long *udma_mask) 890 { 891 if (pio_mask) 892 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; 893 if (mwdma_mask) 894 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; 895 if (udma_mask) 896 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; 897 } 898 899 static const struct ata_xfer_ent { 900 int shift, bits; 901 u8 base; 902 } ata_xfer_tbl[] = { 903 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 }, 904 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 }, 905 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 }, 906 { -1, }, 907 }; 908 909 /** 910 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask 911 * @xfer_mask: xfer_mask of interest 912 * 913 * Return matching XFER_* value for @xfer_mask. Only the highest 914 * bit of @xfer_mask is considered. 915 * 916 * LOCKING: 917 * None. 918 * 919 * RETURNS: 920 * Matching XFER_* value, 0xff if no match found. 921 */ 922 u8 ata_xfer_mask2mode(unsigned long xfer_mask) 923 { 924 int highbit = fls(xfer_mask) - 1; 925 const struct ata_xfer_ent *ent; 926 927 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 928 if (highbit >= ent->shift && highbit < ent->shift + ent->bits) 929 return ent->base + highbit - ent->shift; 930 return 0xff; 931 } 932 933 /** 934 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* 935 * @xfer_mode: XFER_* of interest 936 * 937 * Return matching xfer_mask for @xfer_mode. 938 * 939 * LOCKING: 940 * None. 941 * 942 * RETURNS: 943 * Matching xfer_mask, 0 if no match found. 944 */ 945 unsigned long ata_xfer_mode2mask(u8 xfer_mode) 946 { 947 const struct ata_xfer_ent *ent; 948 949 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 950 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 951 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1) 952 & ~((1 << ent->shift) - 1); 953 return 0; 954 } 955 956 /** 957 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* 958 * @xfer_mode: XFER_* of interest 959 * 960 * Return matching xfer_shift for @xfer_mode. 961 * 962 * LOCKING: 963 * None. 964 * 965 * RETURNS: 966 * Matching xfer_shift, -1 if no match found. 967 */ 968 int ata_xfer_mode2shift(unsigned long xfer_mode) 969 { 970 const struct ata_xfer_ent *ent; 971 972 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 973 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 974 return ent->shift; 975 return -1; 976 } 977 978 /** 979 * ata_mode_string - convert xfer_mask to string 980 * @xfer_mask: mask of bits supported; only highest bit counts. 981 * 982 * Determine string which represents the highest speed 983 * (highest bit in @modemask). 984 * 985 * LOCKING: 986 * None. 987 * 988 * RETURNS: 989 * Constant C string representing highest speed listed in 990 * @mode_mask, or the constant C string "<n/a>". 991 */ 992 const char *ata_mode_string(unsigned long xfer_mask) 993 { 994 static const char * const xfer_mode_str[] = { 995 "PIO0", 996 "PIO1", 997 "PIO2", 998 "PIO3", 999 "PIO4", 1000 "PIO5", 1001 "PIO6", 1002 "MWDMA0", 1003 "MWDMA1", 1004 "MWDMA2", 1005 "MWDMA3", 1006 "MWDMA4", 1007 "UDMA/16", 1008 "UDMA/25", 1009 "UDMA/33", 1010 "UDMA/44", 1011 "UDMA/66", 1012 "UDMA/100", 1013 "UDMA/133", 1014 "UDMA7", 1015 }; 1016 int highbit; 1017 1018 highbit = fls(xfer_mask) - 1; 1019 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) 1020 return xfer_mode_str[highbit]; 1021 return "<n/a>"; 1022 } 1023 1024 const char *sata_spd_string(unsigned int spd) 1025 { 1026 static const char * const spd_str[] = { 1027 "1.5 Gbps", 1028 "3.0 Gbps", 1029 "6.0 Gbps", 1030 }; 1031 1032 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) 1033 return "<unknown>"; 1034 return spd_str[spd - 1]; 1035 } 1036 1037 /** 1038 * ata_dev_classify - determine device type based on ATA-spec signature 1039 * @tf: ATA taskfile register set for device to be identified 1040 * 1041 * Determine from taskfile register contents whether a device is 1042 * ATA or ATAPI, as per "Signature and persistence" section 1043 * of ATA/PI spec (volume 1, sect 5.14). 1044 * 1045 * LOCKING: 1046 * None. 1047 * 1048 * RETURNS: 1049 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP, 1050 * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure. 1051 */ 1052 unsigned int ata_dev_classify(const struct ata_taskfile *tf) 1053 { 1054 /* Apple's open source Darwin code hints that some devices only 1055 * put a proper signature into the LBA mid/high registers, 1056 * So, we only check those. It's sufficient for uniqueness. 1057 * 1058 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate 1059 * signatures for ATA and ATAPI devices attached on SerialATA, 1060 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA 1061 * spec has never mentioned about using different signatures 1062 * for ATA/ATAPI devices. Then, Serial ATA II: Port 1063 * Multiplier specification began to use 0x69/0x96 to identify 1064 * port multpliers and 0x3c/0xc3 to identify SEMB device. 1065 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and 1066 * 0x69/0x96 shortly and described them as reserved for 1067 * SerialATA. 1068 * 1069 * We follow the current spec and consider that 0x69/0x96 1070 * identifies a port multiplier and 0x3c/0xc3 a SEMB device. 1071 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports 1072 * SEMB signature. This is worked around in 1073 * ata_dev_read_id(). 1074 */ 1075 if ((tf->lbam == 0) && (tf->lbah == 0)) { 1076 DPRINTK("found ATA device by sig\n"); 1077 return ATA_DEV_ATA; 1078 } 1079 1080 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) { 1081 DPRINTK("found ATAPI device by sig\n"); 1082 return ATA_DEV_ATAPI; 1083 } 1084 1085 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) { 1086 DPRINTK("found PMP device by sig\n"); 1087 return ATA_DEV_PMP; 1088 } 1089 1090 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) { 1091 DPRINTK("found SEMB device by sig (could be ATA device)\n"); 1092 return ATA_DEV_SEMB; 1093 } 1094 1095 if ((tf->lbam == 0xcd) && (tf->lbah == 0xab)) { 1096 DPRINTK("found ZAC device by sig\n"); 1097 return ATA_DEV_ZAC; 1098 } 1099 1100 DPRINTK("unknown device\n"); 1101 return ATA_DEV_UNKNOWN; 1102 } 1103 1104 /** 1105 * ata_id_string - Convert IDENTIFY DEVICE page into string 1106 * @id: IDENTIFY DEVICE results we will examine 1107 * @s: string into which data is output 1108 * @ofs: offset into identify device page 1109 * @len: length of string to return. must be an even number. 1110 * 1111 * The strings in the IDENTIFY DEVICE page are broken up into 1112 * 16-bit chunks. Run through the string, and output each 1113 * 8-bit chunk linearly, regardless of platform. 1114 * 1115 * LOCKING: 1116 * caller. 1117 */ 1118 1119 void ata_id_string(const u16 *id, unsigned char *s, 1120 unsigned int ofs, unsigned int len) 1121 { 1122 unsigned int c; 1123 1124 BUG_ON(len & 1); 1125 1126 while (len > 0) { 1127 c = id[ofs] >> 8; 1128 *s = c; 1129 s++; 1130 1131 c = id[ofs] & 0xff; 1132 *s = c; 1133 s++; 1134 1135 ofs++; 1136 len -= 2; 1137 } 1138 } 1139 1140 /** 1141 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string 1142 * @id: IDENTIFY DEVICE results we will examine 1143 * @s: string into which data is output 1144 * @ofs: offset into identify device page 1145 * @len: length of string to return. must be an odd number. 1146 * 1147 * This function is identical to ata_id_string except that it 1148 * trims trailing spaces and terminates the resulting string with 1149 * null. @len must be actual maximum length (even number) + 1. 1150 * 1151 * LOCKING: 1152 * caller. 1153 */ 1154 void ata_id_c_string(const u16 *id, unsigned char *s, 1155 unsigned int ofs, unsigned int len) 1156 { 1157 unsigned char *p; 1158 1159 ata_id_string(id, s, ofs, len - 1); 1160 1161 p = s + strnlen(s, len - 1); 1162 while (p > s && p[-1] == ' ') 1163 p--; 1164 *p = '\0'; 1165 } 1166 1167 static u64 ata_id_n_sectors(const u16 *id) 1168 { 1169 if (ata_id_has_lba(id)) { 1170 if (ata_id_has_lba48(id)) 1171 return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2); 1172 else 1173 return ata_id_u32(id, ATA_ID_LBA_CAPACITY); 1174 } else { 1175 if (ata_id_current_chs_valid(id)) 1176 return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] * 1177 id[ATA_ID_CUR_SECTORS]; 1178 else 1179 return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] * 1180 id[ATA_ID_SECTORS]; 1181 } 1182 } 1183 1184 u64 ata_tf_to_lba48(const struct ata_taskfile *tf) 1185 { 1186 u64 sectors = 0; 1187 1188 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; 1189 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; 1190 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24; 1191 sectors |= (tf->lbah & 0xff) << 16; 1192 sectors |= (tf->lbam & 0xff) << 8; 1193 sectors |= (tf->lbal & 0xff); 1194 1195 return sectors; 1196 } 1197 1198 u64 ata_tf_to_lba(const struct ata_taskfile *tf) 1199 { 1200 u64 sectors = 0; 1201 1202 sectors |= (tf->device & 0x0f) << 24; 1203 sectors |= (tf->lbah & 0xff) << 16; 1204 sectors |= (tf->lbam & 0xff) << 8; 1205 sectors |= (tf->lbal & 0xff); 1206 1207 return sectors; 1208 } 1209 1210 /** 1211 * ata_read_native_max_address - Read native max address 1212 * @dev: target device 1213 * @max_sectors: out parameter for the result native max address 1214 * 1215 * Perform an LBA48 or LBA28 native size query upon the device in 1216 * question. 1217 * 1218 * RETURNS: 1219 * 0 on success, -EACCES if command is aborted by the drive. 1220 * -EIO on other errors. 1221 */ 1222 static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors) 1223 { 1224 unsigned int err_mask; 1225 struct ata_taskfile tf; 1226 int lba48 = ata_id_has_lba48(dev->id); 1227 1228 ata_tf_init(dev, &tf); 1229 1230 /* always clear all address registers */ 1231 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1232 1233 if (lba48) { 1234 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; 1235 tf.flags |= ATA_TFLAG_LBA48; 1236 } else 1237 tf.command = ATA_CMD_READ_NATIVE_MAX; 1238 1239 tf.protocol |= ATA_PROT_NODATA; 1240 tf.device |= ATA_LBA; 1241 1242 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 1243 if (err_mask) { 1244 ata_dev_warn(dev, 1245 "failed to read native max address (err_mask=0x%x)\n", 1246 err_mask); 1247 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) 1248 return -EACCES; 1249 return -EIO; 1250 } 1251 1252 if (lba48) 1253 *max_sectors = ata_tf_to_lba48(&tf) + 1; 1254 else 1255 *max_sectors = ata_tf_to_lba(&tf) + 1; 1256 if (dev->horkage & ATA_HORKAGE_HPA_SIZE) 1257 (*max_sectors)--; 1258 return 0; 1259 } 1260 1261 /** 1262 * ata_set_max_sectors - Set max sectors 1263 * @dev: target device 1264 * @new_sectors: new max sectors value to set for the device 1265 * 1266 * Set max sectors of @dev to @new_sectors. 1267 * 1268 * RETURNS: 1269 * 0 on success, -EACCES if command is aborted or denied (due to 1270 * previous non-volatile SET_MAX) by the drive. -EIO on other 1271 * errors. 1272 */ 1273 static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors) 1274 { 1275 unsigned int err_mask; 1276 struct ata_taskfile tf; 1277 int lba48 = ata_id_has_lba48(dev->id); 1278 1279 new_sectors--; 1280 1281 ata_tf_init(dev, &tf); 1282 1283 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1284 1285 if (lba48) { 1286 tf.command = ATA_CMD_SET_MAX_EXT; 1287 tf.flags |= ATA_TFLAG_LBA48; 1288 1289 tf.hob_lbal = (new_sectors >> 24) & 0xff; 1290 tf.hob_lbam = (new_sectors >> 32) & 0xff; 1291 tf.hob_lbah = (new_sectors >> 40) & 0xff; 1292 } else { 1293 tf.command = ATA_CMD_SET_MAX; 1294 1295 tf.device |= (new_sectors >> 24) & 0xf; 1296 } 1297 1298 tf.protocol |= ATA_PROT_NODATA; 1299 tf.device |= ATA_LBA; 1300 1301 tf.lbal = (new_sectors >> 0) & 0xff; 1302 tf.lbam = (new_sectors >> 8) & 0xff; 1303 tf.lbah = (new_sectors >> 16) & 0xff; 1304 1305 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 1306 if (err_mask) { 1307 ata_dev_warn(dev, 1308 "failed to set max address (err_mask=0x%x)\n", 1309 err_mask); 1310 if (err_mask == AC_ERR_DEV && 1311 (tf.feature & (ATA_ABORTED | ATA_IDNF))) 1312 return -EACCES; 1313 return -EIO; 1314 } 1315 1316 return 0; 1317 } 1318 1319 /** 1320 * ata_hpa_resize - Resize a device with an HPA set 1321 * @dev: Device to resize 1322 * 1323 * Read the size of an LBA28 or LBA48 disk with HPA features and resize 1324 * it if required to the full size of the media. The caller must check 1325 * the drive has the HPA feature set enabled. 1326 * 1327 * RETURNS: 1328 * 0 on success, -errno on failure. 1329 */ 1330 static int ata_hpa_resize(struct ata_device *dev) 1331 { 1332 struct ata_eh_context *ehc = &dev->link->eh_context; 1333 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; 1334 bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA; 1335 u64 sectors = ata_id_n_sectors(dev->id); 1336 u64 native_sectors; 1337 int rc; 1338 1339 /* do we need to do it? */ 1340 if ((dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) || 1341 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || 1342 (dev->horkage & ATA_HORKAGE_BROKEN_HPA)) 1343 return 0; 1344 1345 /* read native max address */ 1346 rc = ata_read_native_max_address(dev, &native_sectors); 1347 if (rc) { 1348 /* If device aborted the command or HPA isn't going to 1349 * be unlocked, skip HPA resizing. 1350 */ 1351 if (rc == -EACCES || !unlock_hpa) { 1352 ata_dev_warn(dev, 1353 "HPA support seems broken, skipping HPA handling\n"); 1354 dev->horkage |= ATA_HORKAGE_BROKEN_HPA; 1355 1356 /* we can continue if device aborted the command */ 1357 if (rc == -EACCES) 1358 rc = 0; 1359 } 1360 1361 return rc; 1362 } 1363 dev->n_native_sectors = native_sectors; 1364 1365 /* nothing to do? */ 1366 if (native_sectors <= sectors || !unlock_hpa) { 1367 if (!print_info || native_sectors == sectors) 1368 return 0; 1369 1370 if (native_sectors > sectors) 1371 ata_dev_info(dev, 1372 "HPA detected: current %llu, native %llu\n", 1373 (unsigned long long)sectors, 1374 (unsigned long long)native_sectors); 1375 else if (native_sectors < sectors) 1376 ata_dev_warn(dev, 1377 "native sectors (%llu) is smaller than sectors (%llu)\n", 1378 (unsigned long long)native_sectors, 1379 (unsigned long long)sectors); 1380 return 0; 1381 } 1382 1383 /* let's unlock HPA */ 1384 rc = ata_set_max_sectors(dev, native_sectors); 1385 if (rc == -EACCES) { 1386 /* if device aborted the command, skip HPA resizing */ 1387 ata_dev_warn(dev, 1388 "device aborted resize (%llu -> %llu), skipping HPA handling\n", 1389 (unsigned long long)sectors, 1390 (unsigned long long)native_sectors); 1391 dev->horkage |= ATA_HORKAGE_BROKEN_HPA; 1392 return 0; 1393 } else if (rc) 1394 return rc; 1395 1396 /* re-read IDENTIFY data */ 1397 rc = ata_dev_reread_id(dev, 0); 1398 if (rc) { 1399 ata_dev_err(dev, 1400 "failed to re-read IDENTIFY data after HPA resizing\n"); 1401 return rc; 1402 } 1403 1404 if (print_info) { 1405 u64 new_sectors = ata_id_n_sectors(dev->id); 1406 ata_dev_info(dev, 1407 "HPA unlocked: %llu -> %llu, native %llu\n", 1408 (unsigned long long)sectors, 1409 (unsigned long long)new_sectors, 1410 (unsigned long long)native_sectors); 1411 } 1412 1413 return 0; 1414 } 1415 1416 /** 1417 * ata_dump_id - IDENTIFY DEVICE info debugging output 1418 * @id: IDENTIFY DEVICE page to dump 1419 * 1420 * Dump selected 16-bit words from the given IDENTIFY DEVICE 1421 * page. 1422 * 1423 * LOCKING: 1424 * caller. 1425 */ 1426 1427 static inline void ata_dump_id(const u16 *id) 1428 { 1429 DPRINTK("49==0x%04x " 1430 "53==0x%04x " 1431 "63==0x%04x " 1432 "64==0x%04x " 1433 "75==0x%04x \n", 1434 id[49], 1435 id[53], 1436 id[63], 1437 id[64], 1438 id[75]); 1439 DPRINTK("80==0x%04x " 1440 "81==0x%04x " 1441 "82==0x%04x " 1442 "83==0x%04x " 1443 "84==0x%04x \n", 1444 id[80], 1445 id[81], 1446 id[82], 1447 id[83], 1448 id[84]); 1449 DPRINTK("88==0x%04x " 1450 "93==0x%04x\n", 1451 id[88], 1452 id[93]); 1453 } 1454 1455 /** 1456 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data 1457 * @id: IDENTIFY data to compute xfer mask from 1458 * 1459 * Compute the xfermask for this device. This is not as trivial 1460 * as it seems if we must consider early devices correctly. 1461 * 1462 * FIXME: pre IDE drive timing (do we care ?). 1463 * 1464 * LOCKING: 1465 * None. 1466 * 1467 * RETURNS: 1468 * Computed xfermask 1469 */ 1470 unsigned long ata_id_xfermask(const u16 *id) 1471 { 1472 unsigned long pio_mask, mwdma_mask, udma_mask; 1473 1474 /* Usual case. Word 53 indicates word 64 is valid */ 1475 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { 1476 pio_mask = id[ATA_ID_PIO_MODES] & 0x03; 1477 pio_mask <<= 3; 1478 pio_mask |= 0x7; 1479 } else { 1480 /* If word 64 isn't valid then Word 51 high byte holds 1481 * the PIO timing number for the maximum. Turn it into 1482 * a mask. 1483 */ 1484 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; 1485 if (mode < 5) /* Valid PIO range */ 1486 pio_mask = (2 << mode) - 1; 1487 else 1488 pio_mask = 1; 1489 1490 /* But wait.. there's more. Design your standards by 1491 * committee and you too can get a free iordy field to 1492 * process. However its the speeds not the modes that 1493 * are supported... Note drivers using the timing API 1494 * will get this right anyway 1495 */ 1496 } 1497 1498 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; 1499 1500 if (ata_id_is_cfa(id)) { 1501 /* 1502 * Process compact flash extended modes 1503 */ 1504 int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7; 1505 int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7; 1506 1507 if (pio) 1508 pio_mask |= (1 << 5); 1509 if (pio > 1) 1510 pio_mask |= (1 << 6); 1511 if (dma) 1512 mwdma_mask |= (1 << 3); 1513 if (dma > 1) 1514 mwdma_mask |= (1 << 4); 1515 } 1516 1517 udma_mask = 0; 1518 if (id[ATA_ID_FIELD_VALID] & (1 << 2)) 1519 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; 1520 1521 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 1522 } 1523 1524 static void ata_qc_complete_internal(struct ata_queued_cmd *qc) 1525 { 1526 struct completion *waiting = qc->private_data; 1527 1528 complete(waiting); 1529 } 1530 1531 /** 1532 * ata_exec_internal_sg - execute libata internal command 1533 * @dev: Device to which the command is sent 1534 * @tf: Taskfile registers for the command and the result 1535 * @cdb: CDB for packet command 1536 * @dma_dir: Data transfer direction of the command 1537 * @sgl: sg list for the data buffer of the command 1538 * @n_elem: Number of sg entries 1539 * @timeout: Timeout in msecs (0 for default) 1540 * 1541 * Executes libata internal command with timeout. @tf contains 1542 * command on entry and result on return. Timeout and error 1543 * conditions are reported via return value. No recovery action 1544 * is taken after a command times out. It's caller's duty to 1545 * clean up after timeout. 1546 * 1547 * LOCKING: 1548 * None. Should be called with kernel context, might sleep. 1549 * 1550 * RETURNS: 1551 * Zero on success, AC_ERR_* mask on failure 1552 */ 1553 unsigned ata_exec_internal_sg(struct ata_device *dev, 1554 struct ata_taskfile *tf, const u8 *cdb, 1555 int dma_dir, struct scatterlist *sgl, 1556 unsigned int n_elem, unsigned long timeout) 1557 { 1558 struct ata_link *link = dev->link; 1559 struct ata_port *ap = link->ap; 1560 u8 command = tf->command; 1561 int auto_timeout = 0; 1562 struct ata_queued_cmd *qc; 1563 unsigned int tag, preempted_tag; 1564 u32 preempted_sactive, preempted_qc_active; 1565 int preempted_nr_active_links; 1566 DECLARE_COMPLETION_ONSTACK(wait); 1567 unsigned long flags; 1568 unsigned int err_mask; 1569 int rc; 1570 1571 spin_lock_irqsave(ap->lock, flags); 1572 1573 /* no internal command while frozen */ 1574 if (ap->pflags & ATA_PFLAG_FROZEN) { 1575 spin_unlock_irqrestore(ap->lock, flags); 1576 return AC_ERR_SYSTEM; 1577 } 1578 1579 /* initialize internal qc */ 1580 1581 /* XXX: Tag 0 is used for drivers with legacy EH as some 1582 * drivers choke if any other tag is given. This breaks 1583 * ata_tag_internal() test for those drivers. Don't use new 1584 * EH stuff without converting to it. 1585 */ 1586 if (ap->ops->error_handler) 1587 tag = ATA_TAG_INTERNAL; 1588 else 1589 tag = 0; 1590 1591 qc = __ata_qc_from_tag(ap, tag); 1592 1593 qc->tag = tag; 1594 qc->scsicmd = NULL; 1595 qc->ap = ap; 1596 qc->dev = dev; 1597 ata_qc_reinit(qc); 1598 1599 preempted_tag = link->active_tag; 1600 preempted_sactive = link->sactive; 1601 preempted_qc_active = ap->qc_active; 1602 preempted_nr_active_links = ap->nr_active_links; 1603 link->active_tag = ATA_TAG_POISON; 1604 link->sactive = 0; 1605 ap->qc_active = 0; 1606 ap->nr_active_links = 0; 1607 1608 /* prepare & issue qc */ 1609 qc->tf = *tf; 1610 if (cdb) 1611 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); 1612 1613 /* some SATA bridges need us to indicate data xfer direction */ 1614 if (tf->protocol == ATAPI_PROT_DMA && (dev->flags & ATA_DFLAG_DMADIR) && 1615 dma_dir == DMA_FROM_DEVICE) 1616 qc->tf.feature |= ATAPI_DMADIR; 1617 1618 qc->flags |= ATA_QCFLAG_RESULT_TF; 1619 qc->dma_dir = dma_dir; 1620 if (dma_dir != DMA_NONE) { 1621 unsigned int i, buflen = 0; 1622 struct scatterlist *sg; 1623 1624 for_each_sg(sgl, sg, n_elem, i) 1625 buflen += sg->length; 1626 1627 ata_sg_init(qc, sgl, n_elem); 1628 qc->nbytes = buflen; 1629 } 1630 1631 qc->private_data = &wait; 1632 qc->complete_fn = ata_qc_complete_internal; 1633 1634 ata_qc_issue(qc); 1635 1636 spin_unlock_irqrestore(ap->lock, flags); 1637 1638 if (!timeout) { 1639 if (ata_probe_timeout) 1640 timeout = ata_probe_timeout * 1000; 1641 else { 1642 timeout = ata_internal_cmd_timeout(dev, command); 1643 auto_timeout = 1; 1644 } 1645 } 1646 1647 if (ap->ops->error_handler) 1648 ata_eh_release(ap); 1649 1650 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout)); 1651 1652 if (ap->ops->error_handler) 1653 ata_eh_acquire(ap); 1654 1655 ata_sff_flush_pio_task(ap); 1656 1657 if (!rc) { 1658 spin_lock_irqsave(ap->lock, flags); 1659 1660 /* We're racing with irq here. If we lose, the 1661 * following test prevents us from completing the qc 1662 * twice. If we win, the port is frozen and will be 1663 * cleaned up by ->post_internal_cmd(). 1664 */ 1665 if (qc->flags & ATA_QCFLAG_ACTIVE) { 1666 qc->err_mask |= AC_ERR_TIMEOUT; 1667 1668 if (ap->ops->error_handler) 1669 ata_port_freeze(ap); 1670 else 1671 ata_qc_complete(qc); 1672 1673 if (ata_msg_warn(ap)) 1674 ata_dev_warn(dev, "qc timeout (cmd 0x%x)\n", 1675 command); 1676 } 1677 1678 spin_unlock_irqrestore(ap->lock, flags); 1679 } 1680 1681 /* do post_internal_cmd */ 1682 if (ap->ops->post_internal_cmd) 1683 ap->ops->post_internal_cmd(qc); 1684 1685 /* perform minimal error analysis */ 1686 if (qc->flags & ATA_QCFLAG_FAILED) { 1687 if (qc->result_tf.command & (ATA_ERR | ATA_DF)) 1688 qc->err_mask |= AC_ERR_DEV; 1689 1690 if (!qc->err_mask) 1691 qc->err_mask |= AC_ERR_OTHER; 1692 1693 if (qc->err_mask & ~AC_ERR_OTHER) 1694 qc->err_mask &= ~AC_ERR_OTHER; 1695 } 1696 1697 /* finish up */ 1698 spin_lock_irqsave(ap->lock, flags); 1699 1700 *tf = qc->result_tf; 1701 err_mask = qc->err_mask; 1702 1703 ata_qc_free(qc); 1704 link->active_tag = preempted_tag; 1705 link->sactive = preempted_sactive; 1706 ap->qc_active = preempted_qc_active; 1707 ap->nr_active_links = preempted_nr_active_links; 1708 1709 spin_unlock_irqrestore(ap->lock, flags); 1710 1711 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout) 1712 ata_internal_cmd_timed_out(dev, command); 1713 1714 return err_mask; 1715 } 1716 1717 /** 1718 * ata_exec_internal - execute libata internal command 1719 * @dev: Device to which the command is sent 1720 * @tf: Taskfile registers for the command and the result 1721 * @cdb: CDB for packet command 1722 * @dma_dir: Data transfer direction of the command 1723 * @buf: Data buffer of the command 1724 * @buflen: Length of data buffer 1725 * @timeout: Timeout in msecs (0 for default) 1726 * 1727 * Wrapper around ata_exec_internal_sg() which takes simple 1728 * buffer instead of sg list. 1729 * 1730 * LOCKING: 1731 * None. Should be called with kernel context, might sleep. 1732 * 1733 * RETURNS: 1734 * Zero on success, AC_ERR_* mask on failure 1735 */ 1736 unsigned ata_exec_internal(struct ata_device *dev, 1737 struct ata_taskfile *tf, const u8 *cdb, 1738 int dma_dir, void *buf, unsigned int buflen, 1739 unsigned long timeout) 1740 { 1741 struct scatterlist *psg = NULL, sg; 1742 unsigned int n_elem = 0; 1743 1744 if (dma_dir != DMA_NONE) { 1745 WARN_ON(!buf); 1746 sg_init_one(&sg, buf, buflen); 1747 psg = &sg; 1748 n_elem++; 1749 } 1750 1751 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem, 1752 timeout); 1753 } 1754 1755 /** 1756 * ata_pio_need_iordy - check if iordy needed 1757 * @adev: ATA device 1758 * 1759 * Check if the current speed of the device requires IORDY. Used 1760 * by various controllers for chip configuration. 1761 */ 1762 unsigned int ata_pio_need_iordy(const struct ata_device *adev) 1763 { 1764 /* Don't set IORDY if we're preparing for reset. IORDY may 1765 * lead to controller lock up on certain controllers if the 1766 * port is not occupied. See bko#11703 for details. 1767 */ 1768 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING) 1769 return 0; 1770 /* Controller doesn't support IORDY. Probably a pointless 1771 * check as the caller should know this. 1772 */ 1773 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) 1774 return 0; 1775 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */ 1776 if (ata_id_is_cfa(adev->id) 1777 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6)) 1778 return 0; 1779 /* PIO3 and higher it is mandatory */ 1780 if (adev->pio_mode > XFER_PIO_2) 1781 return 1; 1782 /* We turn it on when possible */ 1783 if (ata_id_has_iordy(adev->id)) 1784 return 1; 1785 return 0; 1786 } 1787 1788 /** 1789 * ata_pio_mask_no_iordy - Return the non IORDY mask 1790 * @adev: ATA device 1791 * 1792 * Compute the highest mode possible if we are not using iordy. Return 1793 * -1 if no iordy mode is available. 1794 */ 1795 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) 1796 { 1797 /* If we have no drive specific rule, then PIO 2 is non IORDY */ 1798 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ 1799 u16 pio = adev->id[ATA_ID_EIDE_PIO]; 1800 /* Is the speed faster than the drive allows non IORDY ? */ 1801 if (pio) { 1802 /* This is cycle times not frequency - watch the logic! */ 1803 if (pio > 240) /* PIO2 is 240nS per cycle */ 1804 return 3 << ATA_SHIFT_PIO; 1805 return 7 << ATA_SHIFT_PIO; 1806 } 1807 } 1808 return 3 << ATA_SHIFT_PIO; 1809 } 1810 1811 /** 1812 * ata_do_dev_read_id - default ID read method 1813 * @dev: device 1814 * @tf: proposed taskfile 1815 * @id: data buffer 1816 * 1817 * Issue the identify taskfile and hand back the buffer containing 1818 * identify data. For some RAID controllers and for pre ATA devices 1819 * this function is wrapped or replaced by the driver 1820 */ 1821 unsigned int ata_do_dev_read_id(struct ata_device *dev, 1822 struct ata_taskfile *tf, u16 *id) 1823 { 1824 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE, 1825 id, sizeof(id[0]) * ATA_ID_WORDS, 0); 1826 } 1827 1828 /** 1829 * ata_dev_read_id - Read ID data from the specified device 1830 * @dev: target device 1831 * @p_class: pointer to class of the target device (may be changed) 1832 * @flags: ATA_READID_* flags 1833 * @id: buffer to read IDENTIFY data into 1834 * 1835 * Read ID data from the specified device. ATA_CMD_ID_ATA is 1836 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI 1837 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS 1838 * for pre-ATA4 drives. 1839 * 1840 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right 1841 * now we abort if we hit that case. 1842 * 1843 * LOCKING: 1844 * Kernel thread context (may sleep) 1845 * 1846 * RETURNS: 1847 * 0 on success, -errno otherwise. 1848 */ 1849 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, 1850 unsigned int flags, u16 *id) 1851 { 1852 struct ata_port *ap = dev->link->ap; 1853 unsigned int class = *p_class; 1854 struct ata_taskfile tf; 1855 unsigned int err_mask = 0; 1856 const char *reason; 1857 bool is_semb = class == ATA_DEV_SEMB; 1858 int may_fallback = 1, tried_spinup = 0; 1859 int rc; 1860 1861 if (ata_msg_ctl(ap)) 1862 ata_dev_dbg(dev, "%s: ENTER\n", __func__); 1863 1864 retry: 1865 ata_tf_init(dev, &tf); 1866 1867 switch (class) { 1868 case ATA_DEV_SEMB: 1869 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */ 1870 case ATA_DEV_ATA: 1871 case ATA_DEV_ZAC: 1872 tf.command = ATA_CMD_ID_ATA; 1873 break; 1874 case ATA_DEV_ATAPI: 1875 tf.command = ATA_CMD_ID_ATAPI; 1876 break; 1877 default: 1878 rc = -ENODEV; 1879 reason = "unsupported class"; 1880 goto err_out; 1881 } 1882 1883 tf.protocol = ATA_PROT_PIO; 1884 1885 /* Some devices choke if TF registers contain garbage. Make 1886 * sure those are properly initialized. 1887 */ 1888 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1889 1890 /* Device presence detection is unreliable on some 1891 * controllers. Always poll IDENTIFY if available. 1892 */ 1893 tf.flags |= ATA_TFLAG_POLLING; 1894 1895 if (ap->ops->read_id) 1896 err_mask = ap->ops->read_id(dev, &tf, id); 1897 else 1898 err_mask = ata_do_dev_read_id(dev, &tf, id); 1899 1900 if (err_mask) { 1901 if (err_mask & AC_ERR_NODEV_HINT) { 1902 ata_dev_dbg(dev, "NODEV after polling detection\n"); 1903 return -ENOENT; 1904 } 1905 1906 if (is_semb) { 1907 ata_dev_info(dev, 1908 "IDENTIFY failed on device w/ SEMB sig, disabled\n"); 1909 /* SEMB is not supported yet */ 1910 *p_class = ATA_DEV_SEMB_UNSUP; 1911 return 0; 1912 } 1913 1914 if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { 1915 /* Device or controller might have reported 1916 * the wrong device class. Give a shot at the 1917 * other IDENTIFY if the current one is 1918 * aborted by the device. 1919 */ 1920 if (may_fallback) { 1921 may_fallback = 0; 1922 1923 if (class == ATA_DEV_ATA) 1924 class = ATA_DEV_ATAPI; 1925 else 1926 class = ATA_DEV_ATA; 1927 goto retry; 1928 } 1929 1930 /* Control reaches here iff the device aborted 1931 * both flavors of IDENTIFYs which happens 1932 * sometimes with phantom devices. 1933 */ 1934 ata_dev_dbg(dev, 1935 "both IDENTIFYs aborted, assuming NODEV\n"); 1936 return -ENOENT; 1937 } 1938 1939 rc = -EIO; 1940 reason = "I/O error"; 1941 goto err_out; 1942 } 1943 1944 if (dev->horkage & ATA_HORKAGE_DUMP_ID) { 1945 ata_dev_dbg(dev, "dumping IDENTIFY data, " 1946 "class=%d may_fallback=%d tried_spinup=%d\n", 1947 class, may_fallback, tried_spinup); 1948 print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 1949 16, 2, id, ATA_ID_WORDS * sizeof(*id), true); 1950 } 1951 1952 /* Falling back doesn't make sense if ID data was read 1953 * successfully at least once. 1954 */ 1955 may_fallback = 0; 1956 1957 swap_buf_le16(id, ATA_ID_WORDS); 1958 1959 /* sanity check */ 1960 rc = -EINVAL; 1961 reason = "device reports invalid type"; 1962 1963 if (class == ATA_DEV_ATA || class == ATA_DEV_ZAC) { 1964 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) 1965 goto err_out; 1966 if (ap->host->flags & ATA_HOST_IGNORE_ATA && 1967 ata_id_is_ata(id)) { 1968 ata_dev_dbg(dev, 1969 "host indicates ignore ATA devices, ignored\n"); 1970 return -ENOENT; 1971 } 1972 } else { 1973 if (ata_id_is_ata(id)) 1974 goto err_out; 1975 } 1976 1977 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { 1978 tried_spinup = 1; 1979 /* 1980 * Drive powered-up in standby mode, and requires a specific 1981 * SET_FEATURES spin-up subcommand before it will accept 1982 * anything other than the original IDENTIFY command. 1983 */ 1984 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0); 1985 if (err_mask && id[2] != 0x738c) { 1986 rc = -EIO; 1987 reason = "SPINUP failed"; 1988 goto err_out; 1989 } 1990 /* 1991 * If the drive initially returned incomplete IDENTIFY info, 1992 * we now must reissue the IDENTIFY command. 1993 */ 1994 if (id[2] == 0x37c8) 1995 goto retry; 1996 } 1997 1998 if ((flags & ATA_READID_POSTRESET) && 1999 (class == ATA_DEV_ATA || class == ATA_DEV_ZAC)) { 2000 /* 2001 * The exact sequence expected by certain pre-ATA4 drives is: 2002 * SRST RESET 2003 * IDENTIFY (optional in early ATA) 2004 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA) 2005 * anything else.. 2006 * Some drives were very specific about that exact sequence. 2007 * 2008 * Note that ATA4 says lba is mandatory so the second check 2009 * should never trigger. 2010 */ 2011 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { 2012 err_mask = ata_dev_init_params(dev, id[3], id[6]); 2013 if (err_mask) { 2014 rc = -EIO; 2015 reason = "INIT_DEV_PARAMS failed"; 2016 goto err_out; 2017 } 2018 2019 /* current CHS translation info (id[53-58]) might be 2020 * changed. reread the identify device info. 2021 */ 2022 flags &= ~ATA_READID_POSTRESET; 2023 goto retry; 2024 } 2025 } 2026 2027 *p_class = class; 2028 2029 return 0; 2030 2031 err_out: 2032 if (ata_msg_warn(ap)) 2033 ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n", 2034 reason, err_mask); 2035 return rc; 2036 } 2037 2038 static int ata_do_link_spd_horkage(struct ata_device *dev) 2039 { 2040 struct ata_link *plink = ata_dev_phys_link(dev); 2041 u32 target, target_limit; 2042 2043 if (!sata_scr_valid(plink)) 2044 return 0; 2045 2046 if (dev->horkage & ATA_HORKAGE_1_5_GBPS) 2047 target = 1; 2048 else 2049 return 0; 2050 2051 target_limit = (1 << target) - 1; 2052 2053 /* if already on stricter limit, no need to push further */ 2054 if (plink->sata_spd_limit <= target_limit) 2055 return 0; 2056 2057 plink->sata_spd_limit = target_limit; 2058 2059 /* Request another EH round by returning -EAGAIN if link is 2060 * going faster than the target speed. Forward progress is 2061 * guaranteed by setting sata_spd_limit to target_limit above. 2062 */ 2063 if (plink->sata_spd > target) { 2064 ata_dev_info(dev, "applying link speed limit horkage to %s\n", 2065 sata_spd_string(target)); 2066 return -EAGAIN; 2067 } 2068 return 0; 2069 } 2070 2071 static inline u8 ata_dev_knobble(struct ata_device *dev) 2072 { 2073 struct ata_port *ap = dev->link->ap; 2074 2075 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK) 2076 return 0; 2077 2078 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); 2079 } 2080 2081 static int ata_dev_config_ncq(struct ata_device *dev, 2082 char *desc, size_t desc_sz) 2083 { 2084 struct ata_port *ap = dev->link->ap; 2085 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); 2086 unsigned int err_mask; 2087 char *aa_desc = ""; 2088 2089 if (!ata_id_has_ncq(dev->id)) { 2090 desc[0] = '\0'; 2091 return 0; 2092 } 2093 if (dev->horkage & ATA_HORKAGE_NONCQ) { 2094 snprintf(desc, desc_sz, "NCQ (not used)"); 2095 return 0; 2096 } 2097 if (ap->flags & ATA_FLAG_NCQ) { 2098 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); 2099 dev->flags |= ATA_DFLAG_NCQ; 2100 } 2101 2102 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) && 2103 (ap->flags & ATA_FLAG_FPDMA_AA) && 2104 ata_id_has_fpdma_aa(dev->id)) { 2105 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE, 2106 SATA_FPDMA_AA); 2107 if (err_mask) { 2108 ata_dev_err(dev, 2109 "failed to enable AA (error_mask=0x%x)\n", 2110 err_mask); 2111 if (err_mask != AC_ERR_DEV) { 2112 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA; 2113 return -EIO; 2114 } 2115 } else 2116 aa_desc = ", AA"; 2117 } 2118 2119 if (hdepth >= ddepth) 2120 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc); 2121 else 2122 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth, 2123 ddepth, aa_desc); 2124 2125 if ((ap->flags & ATA_FLAG_FPDMA_AUX) && 2126 ata_id_has_ncq_send_and_recv(dev->id)) { 2127 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_SEND_RECV, 2128 0, ap->sector_buf, 1); 2129 if (err_mask) { 2130 ata_dev_dbg(dev, 2131 "failed to get NCQ Send/Recv Log Emask 0x%x\n", 2132 err_mask); 2133 } else { 2134 u8 *cmds = dev->ncq_send_recv_cmds; 2135 2136 dev->flags |= ATA_DFLAG_NCQ_SEND_RECV; 2137 memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_SEND_RECV_SIZE); 2138 2139 if (dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) { 2140 ata_dev_dbg(dev, "disabling queued TRIM support\n"); 2141 cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &= 2142 ~ATA_LOG_NCQ_SEND_RECV_DSM_TRIM; 2143 } 2144 } 2145 } 2146 2147 return 0; 2148 } 2149 2150 static void ata_dev_config_sense_reporting(struct ata_device *dev) 2151 { 2152 unsigned int err_mask; 2153 2154 if (!ata_id_has_sense_reporting(dev->id)) 2155 return; 2156 2157 if (ata_id_sense_reporting_enabled(dev->id)) 2158 return; 2159 2160 err_mask = ata_dev_set_feature(dev, SETFEATURE_SENSE_DATA, 0x1); 2161 if (err_mask) { 2162 ata_dev_dbg(dev, 2163 "failed to enable Sense Data Reporting, Emask 0x%x\n", 2164 err_mask); 2165 } 2166 } 2167 2168 /** 2169 * ata_dev_configure - Configure the specified ATA/ATAPI device 2170 * @dev: Target device to configure 2171 * 2172 * Configure @dev according to @dev->id. Generic and low-level 2173 * driver specific fixups are also applied. 2174 * 2175 * LOCKING: 2176 * Kernel thread context (may sleep) 2177 * 2178 * RETURNS: 2179 * 0 on success, -errno otherwise 2180 */ 2181 int ata_dev_configure(struct ata_device *dev) 2182 { 2183 struct ata_port *ap = dev->link->ap; 2184 struct ata_eh_context *ehc = &dev->link->eh_context; 2185 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; 2186 const u16 *id = dev->id; 2187 unsigned long xfer_mask; 2188 unsigned int err_mask; 2189 char revbuf[7]; /* XYZ-99\0 */ 2190 char fwrevbuf[ATA_ID_FW_REV_LEN+1]; 2191 char modelbuf[ATA_ID_PROD_LEN+1]; 2192 int rc; 2193 2194 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { 2195 ata_dev_info(dev, "%s: ENTER/EXIT -- nodev\n", __func__); 2196 return 0; 2197 } 2198 2199 if (ata_msg_probe(ap)) 2200 ata_dev_dbg(dev, "%s: ENTER\n", __func__); 2201 2202 /* set horkage */ 2203 dev->horkage |= ata_dev_blacklisted(dev); 2204 ata_force_horkage(dev); 2205 2206 if (dev->horkage & ATA_HORKAGE_DISABLE) { 2207 ata_dev_info(dev, "unsupported device, disabling\n"); 2208 ata_dev_disable(dev); 2209 return 0; 2210 } 2211 2212 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) && 2213 dev->class == ATA_DEV_ATAPI) { 2214 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n", 2215 atapi_enabled ? "not supported with this driver" 2216 : "disabled"); 2217 ata_dev_disable(dev); 2218 return 0; 2219 } 2220 2221 rc = ata_do_link_spd_horkage(dev); 2222 if (rc) 2223 return rc; 2224 2225 /* some WD SATA-1 drives have issues with LPM, turn on NOLPM for them */ 2226 if ((dev->horkage & ATA_HORKAGE_WD_BROKEN_LPM) && 2227 (id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2) 2228 dev->horkage |= ATA_HORKAGE_NOLPM; 2229 2230 if (dev->horkage & ATA_HORKAGE_NOLPM) { 2231 ata_dev_warn(dev, "LPM support broken, forcing max_power\n"); 2232 dev->link->ap->target_lpm_policy = ATA_LPM_MAX_POWER; 2233 } 2234 2235 /* let ACPI work its magic */ 2236 rc = ata_acpi_on_devcfg(dev); 2237 if (rc) 2238 return rc; 2239 2240 /* massage HPA, do it early as it might change IDENTIFY data */ 2241 rc = ata_hpa_resize(dev); 2242 if (rc) 2243 return rc; 2244 2245 /* print device capabilities */ 2246 if (ata_msg_probe(ap)) 2247 ata_dev_dbg(dev, 2248 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " 2249 "85:%04x 86:%04x 87:%04x 88:%04x\n", 2250 __func__, 2251 id[49], id[82], id[83], id[84], 2252 id[85], id[86], id[87], id[88]); 2253 2254 /* initialize to-be-configured parameters */ 2255 dev->flags &= ~ATA_DFLAG_CFG_MASK; 2256 dev->max_sectors = 0; 2257 dev->cdb_len = 0; 2258 dev->n_sectors = 0; 2259 dev->cylinders = 0; 2260 dev->heads = 0; 2261 dev->sectors = 0; 2262 dev->multi_count = 0; 2263 2264 /* 2265 * common ATA, ATAPI feature tests 2266 */ 2267 2268 /* find max transfer mode; for printk only */ 2269 xfer_mask = ata_id_xfermask(id); 2270 2271 if (ata_msg_probe(ap)) 2272 ata_dump_id(id); 2273 2274 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ 2275 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, 2276 sizeof(fwrevbuf)); 2277 2278 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, 2279 sizeof(modelbuf)); 2280 2281 /* ATA-specific feature tests */ 2282 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 2283 if (ata_id_is_cfa(id)) { 2284 /* CPRM may make this media unusable */ 2285 if (id[ATA_ID_CFA_KEY_MGMT] & 1) 2286 ata_dev_warn(dev, 2287 "supports DRM functions and may not be fully accessible\n"); 2288 snprintf(revbuf, 7, "CFA"); 2289 } else { 2290 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); 2291 /* Warn the user if the device has TPM extensions */ 2292 if (ata_id_has_tpm(id)) 2293 ata_dev_warn(dev, 2294 "supports DRM functions and may not be fully accessible\n"); 2295 } 2296 2297 dev->n_sectors = ata_id_n_sectors(id); 2298 2299 /* get current R/W Multiple count setting */ 2300 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) { 2301 unsigned int max = dev->id[47] & 0xff; 2302 unsigned int cnt = dev->id[59] & 0xff; 2303 /* only recognize/allow powers of two here */ 2304 if (is_power_of_2(max) && is_power_of_2(cnt)) 2305 if (cnt <= max) 2306 dev->multi_count = cnt; 2307 } 2308 2309 if (ata_id_has_lba(id)) { 2310 const char *lba_desc; 2311 char ncq_desc[24]; 2312 2313 lba_desc = "LBA"; 2314 dev->flags |= ATA_DFLAG_LBA; 2315 if (ata_id_has_lba48(id)) { 2316 dev->flags |= ATA_DFLAG_LBA48; 2317 lba_desc = "LBA48"; 2318 2319 if (dev->n_sectors >= (1UL << 28) && 2320 ata_id_has_flush_ext(id)) 2321 dev->flags |= ATA_DFLAG_FLUSH_EXT; 2322 } 2323 2324 /* config NCQ */ 2325 rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); 2326 if (rc) 2327 return rc; 2328 2329 /* print device info to dmesg */ 2330 if (ata_msg_drv(ap) && print_info) { 2331 ata_dev_info(dev, "%s: %s, %s, max %s\n", 2332 revbuf, modelbuf, fwrevbuf, 2333 ata_mode_string(xfer_mask)); 2334 ata_dev_info(dev, 2335 "%llu sectors, multi %u: %s %s\n", 2336 (unsigned long long)dev->n_sectors, 2337 dev->multi_count, lba_desc, ncq_desc); 2338 } 2339 } else { 2340 /* CHS */ 2341 2342 /* Default translation */ 2343 dev->cylinders = id[1]; 2344 dev->heads = id[3]; 2345 dev->sectors = id[6]; 2346 2347 if (ata_id_current_chs_valid(id)) { 2348 /* Current CHS translation is valid. */ 2349 dev->cylinders = id[54]; 2350 dev->heads = id[55]; 2351 dev->sectors = id[56]; 2352 } 2353 2354 /* print device info to dmesg */ 2355 if (ata_msg_drv(ap) && print_info) { 2356 ata_dev_info(dev, "%s: %s, %s, max %s\n", 2357 revbuf, modelbuf, fwrevbuf, 2358 ata_mode_string(xfer_mask)); 2359 ata_dev_info(dev, 2360 "%llu sectors, multi %u, CHS %u/%u/%u\n", 2361 (unsigned long long)dev->n_sectors, 2362 dev->multi_count, dev->cylinders, 2363 dev->heads, dev->sectors); 2364 } 2365 } 2366 2367 /* Check and mark DevSlp capability. Get DevSlp timing variables 2368 * from SATA Settings page of Identify Device Data Log. 2369 */ 2370 if (ata_id_has_devslp(dev->id)) { 2371 u8 *sata_setting = ap->sector_buf; 2372 int i, j; 2373 2374 dev->flags |= ATA_DFLAG_DEVSLP; 2375 err_mask = ata_read_log_page(dev, 2376 ATA_LOG_SATA_ID_DEV_DATA, 2377 ATA_LOG_SATA_SETTINGS, 2378 sata_setting, 2379 1); 2380 if (err_mask) 2381 ata_dev_dbg(dev, 2382 "failed to get Identify Device Data, Emask 0x%x\n", 2383 err_mask); 2384 else 2385 for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) { 2386 j = ATA_LOG_DEVSLP_OFFSET + i; 2387 dev->devslp_timing[i] = sata_setting[j]; 2388 } 2389 } 2390 ata_dev_config_sense_reporting(dev); 2391 dev->cdb_len = 16; 2392 } 2393 2394 /* ATAPI-specific feature tests */ 2395 else if (dev->class == ATA_DEV_ATAPI) { 2396 const char *cdb_intr_string = ""; 2397 const char *atapi_an_string = ""; 2398 const char *dma_dir_string = ""; 2399 u32 sntf; 2400 2401 rc = atapi_cdb_len(id); 2402 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { 2403 if (ata_msg_warn(ap)) 2404 ata_dev_warn(dev, "unsupported CDB len\n"); 2405 rc = -EINVAL; 2406 goto err_out_nosup; 2407 } 2408 dev->cdb_len = (unsigned int) rc; 2409 2410 /* Enable ATAPI AN if both the host and device have 2411 * the support. If PMP is attached, SNTF is required 2412 * to enable ATAPI AN to discern between PHY status 2413 * changed notifications and ATAPI ANs. 2414 */ 2415 if (atapi_an && 2416 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && 2417 (!sata_pmp_attached(ap) || 2418 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { 2419 /* issue SET feature command to turn this on */ 2420 err_mask = ata_dev_set_feature(dev, 2421 SETFEATURES_SATA_ENABLE, SATA_AN); 2422 if (err_mask) 2423 ata_dev_err(dev, 2424 "failed to enable ATAPI AN (err_mask=0x%x)\n", 2425 err_mask); 2426 else { 2427 dev->flags |= ATA_DFLAG_AN; 2428 atapi_an_string = ", ATAPI AN"; 2429 } 2430 } 2431 2432 if (ata_id_cdb_intr(dev->id)) { 2433 dev->flags |= ATA_DFLAG_CDB_INTR; 2434 cdb_intr_string = ", CDB intr"; 2435 } 2436 2437 if (atapi_dmadir || (dev->horkage & ATA_HORKAGE_ATAPI_DMADIR) || atapi_id_dmadir(dev->id)) { 2438 dev->flags |= ATA_DFLAG_DMADIR; 2439 dma_dir_string = ", DMADIR"; 2440 } 2441 2442 if (ata_id_has_da(dev->id)) { 2443 dev->flags |= ATA_DFLAG_DA; 2444 zpodd_init(dev); 2445 } 2446 2447 /* print device info to dmesg */ 2448 if (ata_msg_drv(ap) && print_info) 2449 ata_dev_info(dev, 2450 "ATAPI: %s, %s, max %s%s%s%s\n", 2451 modelbuf, fwrevbuf, 2452 ata_mode_string(xfer_mask), 2453 cdb_intr_string, atapi_an_string, 2454 dma_dir_string); 2455 } 2456 2457 /* determine max_sectors */ 2458 dev->max_sectors = ATA_MAX_SECTORS; 2459 if (dev->flags & ATA_DFLAG_LBA48) 2460 dev->max_sectors = ATA_MAX_SECTORS_LBA48; 2461 2462 /* Limit PATA drive on SATA cable bridge transfers to udma5, 2463 200 sectors */ 2464 if (ata_dev_knobble(dev)) { 2465 if (ata_msg_drv(ap) && print_info) 2466 ata_dev_info(dev, "applying bridge limits\n"); 2467 dev->udma_mask &= ATA_UDMA5; 2468 dev->max_sectors = ATA_MAX_SECTORS; 2469 } 2470 2471 if ((dev->class == ATA_DEV_ATAPI) && 2472 (atapi_command_packet_set(id) == TYPE_TAPE)) { 2473 dev->max_sectors = ATA_MAX_SECTORS_TAPE; 2474 dev->horkage |= ATA_HORKAGE_STUCK_ERR; 2475 } 2476 2477 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) 2478 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, 2479 dev->max_sectors); 2480 2481 if (dev->horkage & ATA_HORKAGE_MAX_SEC_1024) 2482 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_1024, 2483 dev->max_sectors); 2484 2485 if (dev->horkage & ATA_HORKAGE_MAX_SEC_LBA48) 2486 dev->max_sectors = ATA_MAX_SECTORS_LBA48; 2487 2488 if (ap->ops->dev_config) 2489 ap->ops->dev_config(dev); 2490 2491 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { 2492 /* Let the user know. We don't want to disallow opens for 2493 rescue purposes, or in case the vendor is just a blithering 2494 idiot. Do this after the dev_config call as some controllers 2495 with buggy firmware may want to avoid reporting false device 2496 bugs */ 2497 2498 if (print_info) { 2499 ata_dev_warn(dev, 2500 "Drive reports diagnostics failure. This may indicate a drive\n"); 2501 ata_dev_warn(dev, 2502 "fault or invalid emulation. Contact drive vendor for information.\n"); 2503 } 2504 } 2505 2506 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) { 2507 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n"); 2508 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n"); 2509 } 2510 2511 return 0; 2512 2513 err_out_nosup: 2514 if (ata_msg_probe(ap)) 2515 ata_dev_dbg(dev, "%s: EXIT, err\n", __func__); 2516 return rc; 2517 } 2518 2519 /** 2520 * ata_cable_40wire - return 40 wire cable type 2521 * @ap: port 2522 * 2523 * Helper method for drivers which want to hardwire 40 wire cable 2524 * detection. 2525 */ 2526 2527 int ata_cable_40wire(struct ata_port *ap) 2528 { 2529 return ATA_CBL_PATA40; 2530 } 2531 2532 /** 2533 * ata_cable_80wire - return 80 wire cable type 2534 * @ap: port 2535 * 2536 * Helper method for drivers which want to hardwire 80 wire cable 2537 * detection. 2538 */ 2539 2540 int ata_cable_80wire(struct ata_port *ap) 2541 { 2542 return ATA_CBL_PATA80; 2543 } 2544 2545 /** 2546 * ata_cable_unknown - return unknown PATA cable. 2547 * @ap: port 2548 * 2549 * Helper method for drivers which have no PATA cable detection. 2550 */ 2551 2552 int ata_cable_unknown(struct ata_port *ap) 2553 { 2554 return ATA_CBL_PATA_UNK; 2555 } 2556 2557 /** 2558 * ata_cable_ignore - return ignored PATA cable. 2559 * @ap: port 2560 * 2561 * Helper method for drivers which don't use cable type to limit 2562 * transfer mode. 2563 */ 2564 int ata_cable_ignore(struct ata_port *ap) 2565 { 2566 return ATA_CBL_PATA_IGN; 2567 } 2568 2569 /** 2570 * ata_cable_sata - return SATA cable type 2571 * @ap: port 2572 * 2573 * Helper method for drivers which have SATA cables 2574 */ 2575 2576 int ata_cable_sata(struct ata_port *ap) 2577 { 2578 return ATA_CBL_SATA; 2579 } 2580 2581 /** 2582 * ata_bus_probe - Reset and probe ATA bus 2583 * @ap: Bus to probe 2584 * 2585 * Master ATA bus probing function. Initiates a hardware-dependent 2586 * bus reset, then attempts to identify any devices found on 2587 * the bus. 2588 * 2589 * LOCKING: 2590 * PCI/etc. bus probe sem. 2591 * 2592 * RETURNS: 2593 * Zero on success, negative errno otherwise. 2594 */ 2595 2596 int ata_bus_probe(struct ata_port *ap) 2597 { 2598 unsigned int classes[ATA_MAX_DEVICES]; 2599 int tries[ATA_MAX_DEVICES]; 2600 int rc; 2601 struct ata_device *dev; 2602 2603 ata_for_each_dev(dev, &ap->link, ALL) 2604 tries[dev->devno] = ATA_PROBE_MAX_TRIES; 2605 2606 retry: 2607 ata_for_each_dev(dev, &ap->link, ALL) { 2608 /* If we issue an SRST then an ATA drive (not ATAPI) 2609 * may change configuration and be in PIO0 timing. If 2610 * we do a hard reset (or are coming from power on) 2611 * this is true for ATA or ATAPI. Until we've set a 2612 * suitable controller mode we should not touch the 2613 * bus as we may be talking too fast. 2614 */ 2615 dev->pio_mode = XFER_PIO_0; 2616 dev->dma_mode = 0xff; 2617 2618 /* If the controller has a pio mode setup function 2619 * then use it to set the chipset to rights. Don't 2620 * touch the DMA setup as that will be dealt with when 2621 * configuring devices. 2622 */ 2623 if (ap->ops->set_piomode) 2624 ap->ops->set_piomode(ap, dev); 2625 } 2626 2627 /* reset and determine device classes */ 2628 ap->ops->phy_reset(ap); 2629 2630 ata_for_each_dev(dev, &ap->link, ALL) { 2631 if (dev->class != ATA_DEV_UNKNOWN) 2632 classes[dev->devno] = dev->class; 2633 else 2634 classes[dev->devno] = ATA_DEV_NONE; 2635 2636 dev->class = ATA_DEV_UNKNOWN; 2637 } 2638 2639 /* read IDENTIFY page and configure devices. We have to do the identify 2640 specific sequence bass-ackwards so that PDIAG- is released by 2641 the slave device */ 2642 2643 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) { 2644 if (tries[dev->devno]) 2645 dev->class = classes[dev->devno]; 2646 2647 if (!ata_dev_enabled(dev)) 2648 continue; 2649 2650 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, 2651 dev->id); 2652 if (rc) 2653 goto fail; 2654 } 2655 2656 /* Now ask for the cable type as PDIAG- should have been released */ 2657 if (ap->ops->cable_detect) 2658 ap->cbl = ap->ops->cable_detect(ap); 2659 2660 /* We may have SATA bridge glue hiding here irrespective of 2661 * the reported cable types and sensed types. When SATA 2662 * drives indicate we have a bridge, we don't know which end 2663 * of the link the bridge is which is a problem. 2664 */ 2665 ata_for_each_dev(dev, &ap->link, ENABLED) 2666 if (ata_id_is_sata(dev->id)) 2667 ap->cbl = ATA_CBL_SATA; 2668 2669 /* After the identify sequence we can now set up the devices. We do 2670 this in the normal order so that the user doesn't get confused */ 2671 2672 ata_for_each_dev(dev, &ap->link, ENABLED) { 2673 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO; 2674 rc = ata_dev_configure(dev); 2675 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO; 2676 if (rc) 2677 goto fail; 2678 } 2679 2680 /* configure transfer mode */ 2681 rc = ata_set_mode(&ap->link, &dev); 2682 if (rc) 2683 goto fail; 2684 2685 ata_for_each_dev(dev, &ap->link, ENABLED) 2686 return 0; 2687 2688 return -ENODEV; 2689 2690 fail: 2691 tries[dev->devno]--; 2692 2693 switch (rc) { 2694 case -EINVAL: 2695 /* eeek, something went very wrong, give up */ 2696 tries[dev->devno] = 0; 2697 break; 2698 2699 case -ENODEV: 2700 /* give it just one more chance */ 2701 tries[dev->devno] = min(tries[dev->devno], 1); 2702 case -EIO: 2703 if (tries[dev->devno] == 1) { 2704 /* This is the last chance, better to slow 2705 * down than lose it. 2706 */ 2707 sata_down_spd_limit(&ap->link, 0); 2708 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); 2709 } 2710 } 2711 2712 if (!tries[dev->devno]) 2713 ata_dev_disable(dev); 2714 2715 goto retry; 2716 } 2717 2718 /** 2719 * sata_print_link_status - Print SATA link status 2720 * @link: SATA link to printk link status about 2721 * 2722 * This function prints link speed and status of a SATA link. 2723 * 2724 * LOCKING: 2725 * None. 2726 */ 2727 static void sata_print_link_status(struct ata_link *link) 2728 { 2729 u32 sstatus, scontrol, tmp; 2730 2731 if (sata_scr_read(link, SCR_STATUS, &sstatus)) 2732 return; 2733 sata_scr_read(link, SCR_CONTROL, &scontrol); 2734 2735 if (ata_phys_link_online(link)) { 2736 tmp = (sstatus >> 4) & 0xf; 2737 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n", 2738 sata_spd_string(tmp), sstatus, scontrol); 2739 } else { 2740 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n", 2741 sstatus, scontrol); 2742 } 2743 } 2744 2745 /** 2746 * ata_dev_pair - return other device on cable 2747 * @adev: device 2748 * 2749 * Obtain the other device on the same cable, or if none is 2750 * present NULL is returned 2751 */ 2752 2753 struct ata_device *ata_dev_pair(struct ata_device *adev) 2754 { 2755 struct ata_link *link = adev->link; 2756 struct ata_device *pair = &link->device[1 - adev->devno]; 2757 if (!ata_dev_enabled(pair)) 2758 return NULL; 2759 return pair; 2760 } 2761 2762 /** 2763 * sata_down_spd_limit - adjust SATA spd limit downward 2764 * @link: Link to adjust SATA spd limit for 2765 * @spd_limit: Additional limit 2766 * 2767 * Adjust SATA spd limit of @link downward. Note that this 2768 * function only adjusts the limit. The change must be applied 2769 * using sata_set_spd(). 2770 * 2771 * If @spd_limit is non-zero, the speed is limited to equal to or 2772 * lower than @spd_limit if such speed is supported. If 2773 * @spd_limit is slower than any supported speed, only the lowest 2774 * supported speed is allowed. 2775 * 2776 * LOCKING: 2777 * Inherited from caller. 2778 * 2779 * RETURNS: 2780 * 0 on success, negative errno on failure 2781 */ 2782 int sata_down_spd_limit(struct ata_link *link, u32 spd_limit) 2783 { 2784 u32 sstatus, spd, mask; 2785 int rc, bit; 2786 2787 if (!sata_scr_valid(link)) 2788 return -EOPNOTSUPP; 2789 2790 /* If SCR can be read, use it to determine the current SPD. 2791 * If not, use cached value in link->sata_spd. 2792 */ 2793 rc = sata_scr_read(link, SCR_STATUS, &sstatus); 2794 if (rc == 0 && ata_sstatus_online(sstatus)) 2795 spd = (sstatus >> 4) & 0xf; 2796 else 2797 spd = link->sata_spd; 2798 2799 mask = link->sata_spd_limit; 2800 if (mask <= 1) 2801 return -EINVAL; 2802 2803 /* unconditionally mask off the highest bit */ 2804 bit = fls(mask) - 1; 2805 mask &= ~(1 << bit); 2806 2807 /* Mask off all speeds higher than or equal to the current 2808 * one. Force 1.5Gbps if current SPD is not available. 2809 */ 2810 if (spd > 1) 2811 mask &= (1 << (spd - 1)) - 1; 2812 else 2813 mask &= 1; 2814 2815 /* were we already at the bottom? */ 2816 if (!mask) 2817 return -EINVAL; 2818 2819 if (spd_limit) { 2820 if (mask & ((1 << spd_limit) - 1)) 2821 mask &= (1 << spd_limit) - 1; 2822 else { 2823 bit = ffs(mask) - 1; 2824 mask = 1 << bit; 2825 } 2826 } 2827 2828 link->sata_spd_limit = mask; 2829 2830 ata_link_warn(link, "limiting SATA link speed to %s\n", 2831 sata_spd_string(fls(mask))); 2832 2833 return 0; 2834 } 2835 2836 static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol) 2837 { 2838 struct ata_link *host_link = &link->ap->link; 2839 u32 limit, target, spd; 2840 2841 limit = link->sata_spd_limit; 2842 2843 /* Don't configure downstream link faster than upstream link. 2844 * It doesn't speed up anything and some PMPs choke on such 2845 * configuration. 2846 */ 2847 if (!ata_is_host_link(link) && host_link->sata_spd) 2848 limit &= (1 << host_link->sata_spd) - 1; 2849 2850 if (limit == UINT_MAX) 2851 target = 0; 2852 else 2853 target = fls(limit); 2854 2855 spd = (*scontrol >> 4) & 0xf; 2856 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4); 2857 2858 return spd != target; 2859 } 2860 2861 /** 2862 * sata_set_spd_needed - is SATA spd configuration needed 2863 * @link: Link in question 2864 * 2865 * Test whether the spd limit in SControl matches 2866 * @link->sata_spd_limit. This function is used to determine 2867 * whether hardreset is necessary to apply SATA spd 2868 * configuration. 2869 * 2870 * LOCKING: 2871 * Inherited from caller. 2872 * 2873 * RETURNS: 2874 * 1 if SATA spd configuration is needed, 0 otherwise. 2875 */ 2876 static int sata_set_spd_needed(struct ata_link *link) 2877 { 2878 u32 scontrol; 2879 2880 if (sata_scr_read(link, SCR_CONTROL, &scontrol)) 2881 return 1; 2882 2883 return __sata_set_spd_needed(link, &scontrol); 2884 } 2885 2886 /** 2887 * sata_set_spd - set SATA spd according to spd limit 2888 * @link: Link to set SATA spd for 2889 * 2890 * Set SATA spd of @link according to sata_spd_limit. 2891 * 2892 * LOCKING: 2893 * Inherited from caller. 2894 * 2895 * RETURNS: 2896 * 0 if spd doesn't need to be changed, 1 if spd has been 2897 * changed. Negative errno if SCR registers are inaccessible. 2898 */ 2899 int sata_set_spd(struct ata_link *link) 2900 { 2901 u32 scontrol; 2902 int rc; 2903 2904 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 2905 return rc; 2906 2907 if (!__sata_set_spd_needed(link, &scontrol)) 2908 return 0; 2909 2910 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) 2911 return rc; 2912 2913 return 1; 2914 } 2915 2916 /* 2917 * This mode timing computation functionality is ported over from 2918 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik 2919 */ 2920 /* 2921 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). 2922 * These were taken from ATA/ATAPI-6 standard, rev 0a, except 2923 * for UDMA6, which is currently supported only by Maxtor drives. 2924 * 2925 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. 2926 */ 2927 2928 static const struct ata_timing ata_timing[] = { 2929 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */ 2930 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 }, 2931 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 }, 2932 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 }, 2933 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 }, 2934 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 }, 2935 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 }, 2936 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 }, 2937 2938 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 }, 2939 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 }, 2940 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 }, 2941 2942 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 }, 2943 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 }, 2944 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 }, 2945 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 }, 2946 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 }, 2947 2948 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */ 2949 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 }, 2950 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 }, 2951 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 }, 2952 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 }, 2953 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 }, 2954 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 }, 2955 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 }, 2956 2957 { 0xFF } 2958 }; 2959 2960 #define ENOUGH(v, unit) (((v)-1)/(unit)+1) 2961 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0) 2962 2963 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) 2964 { 2965 q->setup = EZ(t->setup * 1000, T); 2966 q->act8b = EZ(t->act8b * 1000, T); 2967 q->rec8b = EZ(t->rec8b * 1000, T); 2968 q->cyc8b = EZ(t->cyc8b * 1000, T); 2969 q->active = EZ(t->active * 1000, T); 2970 q->recover = EZ(t->recover * 1000, T); 2971 q->dmack_hold = EZ(t->dmack_hold * 1000, T); 2972 q->cycle = EZ(t->cycle * 1000, T); 2973 q->udma = EZ(t->udma * 1000, UT); 2974 } 2975 2976 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, 2977 struct ata_timing *m, unsigned int what) 2978 { 2979 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); 2980 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); 2981 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); 2982 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); 2983 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); 2984 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); 2985 if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold); 2986 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); 2987 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); 2988 } 2989 2990 const struct ata_timing *ata_timing_find_mode(u8 xfer_mode) 2991 { 2992 const struct ata_timing *t = ata_timing; 2993 2994 while (xfer_mode > t->mode) 2995 t++; 2996 2997 if (xfer_mode == t->mode) 2998 return t; 2999 3000 WARN_ONCE(true, "%s: unable to find timing for xfer_mode 0x%x\n", 3001 __func__, xfer_mode); 3002 3003 return NULL; 3004 } 3005 3006 int ata_timing_compute(struct ata_device *adev, unsigned short speed, 3007 struct ata_timing *t, int T, int UT) 3008 { 3009 const u16 *id = adev->id; 3010 const struct ata_timing *s; 3011 struct ata_timing p; 3012 3013 /* 3014 * Find the mode. 3015 */ 3016 3017 if (!(s = ata_timing_find_mode(speed))) 3018 return -EINVAL; 3019 3020 memcpy(t, s, sizeof(*s)); 3021 3022 /* 3023 * If the drive is an EIDE drive, it can tell us it needs extended 3024 * PIO/MW_DMA cycle timing. 3025 */ 3026 3027 if (id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ 3028 memset(&p, 0, sizeof(p)); 3029 3030 if (speed >= XFER_PIO_0 && speed < XFER_SW_DMA_0) { 3031 if (speed <= XFER_PIO_2) 3032 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO]; 3033 else if ((speed <= XFER_PIO_4) || 3034 (speed == XFER_PIO_5 && !ata_id_is_cfa(id))) 3035 p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO_IORDY]; 3036 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) 3037 p.cycle = id[ATA_ID_EIDE_DMA_MIN]; 3038 3039 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); 3040 } 3041 3042 /* 3043 * Convert the timing to bus clock counts. 3044 */ 3045 3046 ata_timing_quantize(t, t, T, UT); 3047 3048 /* 3049 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, 3050 * S.M.A.R.T * and some other commands. We have to ensure that the 3051 * DMA cycle timing is slower/equal than the fastest PIO timing. 3052 */ 3053 3054 if (speed > XFER_PIO_6) { 3055 ata_timing_compute(adev, adev->pio_mode, &p, T, UT); 3056 ata_timing_merge(&p, t, t, ATA_TIMING_ALL); 3057 } 3058 3059 /* 3060 * Lengthen active & recovery time so that cycle time is correct. 3061 */ 3062 3063 if (t->act8b + t->rec8b < t->cyc8b) { 3064 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; 3065 t->rec8b = t->cyc8b - t->act8b; 3066 } 3067 3068 if (t->active + t->recover < t->cycle) { 3069 t->active += (t->cycle - (t->active + t->recover)) / 2; 3070 t->recover = t->cycle - t->active; 3071 } 3072 3073 /* In a few cases quantisation may produce enough errors to 3074 leave t->cycle too low for the sum of active and recovery 3075 if so we must correct this */ 3076 if (t->active + t->recover > t->cycle) 3077 t->cycle = t->active + t->recover; 3078 3079 return 0; 3080 } 3081 3082 /** 3083 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration 3084 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine. 3085 * @cycle: cycle duration in ns 3086 * 3087 * Return matching xfer mode for @cycle. The returned mode is of 3088 * the transfer type specified by @xfer_shift. If @cycle is too 3089 * slow for @xfer_shift, 0xff is returned. If @cycle is faster 3090 * than the fastest known mode, the fasted mode is returned. 3091 * 3092 * LOCKING: 3093 * None. 3094 * 3095 * RETURNS: 3096 * Matching xfer_mode, 0xff if no match found. 3097 */ 3098 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle) 3099 { 3100 u8 base_mode = 0xff, last_mode = 0xff; 3101 const struct ata_xfer_ent *ent; 3102 const struct ata_timing *t; 3103 3104 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 3105 if (ent->shift == xfer_shift) 3106 base_mode = ent->base; 3107 3108 for (t = ata_timing_find_mode(base_mode); 3109 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) { 3110 unsigned short this_cycle; 3111 3112 switch (xfer_shift) { 3113 case ATA_SHIFT_PIO: 3114 case ATA_SHIFT_MWDMA: 3115 this_cycle = t->cycle; 3116 break; 3117 case ATA_SHIFT_UDMA: 3118 this_cycle = t->udma; 3119 break; 3120 default: 3121 return 0xff; 3122 } 3123 3124 if (cycle > this_cycle) 3125 break; 3126 3127 last_mode = t->mode; 3128 } 3129 3130 return last_mode; 3131 } 3132 3133 /** 3134 * ata_down_xfermask_limit - adjust dev xfer masks downward 3135 * @dev: Device to adjust xfer masks 3136 * @sel: ATA_DNXFER_* selector 3137 * 3138 * Adjust xfer masks of @dev downward. Note that this function 3139 * does not apply the change. Invoking ata_set_mode() afterwards 3140 * will apply the limit. 3141 * 3142 * LOCKING: 3143 * Inherited from caller. 3144 * 3145 * RETURNS: 3146 * 0 on success, negative errno on failure 3147 */ 3148 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) 3149 { 3150 char buf[32]; 3151 unsigned long orig_mask, xfer_mask; 3152 unsigned long pio_mask, mwdma_mask, udma_mask; 3153 int quiet, highbit; 3154 3155 quiet = !!(sel & ATA_DNXFER_QUIET); 3156 sel &= ~ATA_DNXFER_QUIET; 3157 3158 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, 3159 dev->mwdma_mask, 3160 dev->udma_mask); 3161 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); 3162 3163 switch (sel) { 3164 case ATA_DNXFER_PIO: 3165 highbit = fls(pio_mask) - 1; 3166 pio_mask &= ~(1 << highbit); 3167 break; 3168 3169 case ATA_DNXFER_DMA: 3170 if (udma_mask) { 3171 highbit = fls(udma_mask) - 1; 3172 udma_mask &= ~(1 << highbit); 3173 if (!udma_mask) 3174 return -ENOENT; 3175 } else if (mwdma_mask) { 3176 highbit = fls(mwdma_mask) - 1; 3177 mwdma_mask &= ~(1 << highbit); 3178 if (!mwdma_mask) 3179 return -ENOENT; 3180 } 3181 break; 3182 3183 case ATA_DNXFER_40C: 3184 udma_mask &= ATA_UDMA_MASK_40C; 3185 break; 3186 3187 case ATA_DNXFER_FORCE_PIO0: 3188 pio_mask &= 1; 3189 case ATA_DNXFER_FORCE_PIO: 3190 mwdma_mask = 0; 3191 udma_mask = 0; 3192 break; 3193 3194 default: 3195 BUG(); 3196 } 3197 3198 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 3199 3200 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) 3201 return -ENOENT; 3202 3203 if (!quiet) { 3204 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) 3205 snprintf(buf, sizeof(buf), "%s:%s", 3206 ata_mode_string(xfer_mask), 3207 ata_mode_string(xfer_mask & ATA_MASK_PIO)); 3208 else 3209 snprintf(buf, sizeof(buf), "%s", 3210 ata_mode_string(xfer_mask)); 3211 3212 ata_dev_warn(dev, "limiting speed to %s\n", buf); 3213 } 3214 3215 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, 3216 &dev->udma_mask); 3217 3218 return 0; 3219 } 3220 3221 static int ata_dev_set_mode(struct ata_device *dev) 3222 { 3223 struct ata_port *ap = dev->link->ap; 3224 struct ata_eh_context *ehc = &dev->link->eh_context; 3225 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER; 3226 const char *dev_err_whine = ""; 3227 int ign_dev_err = 0; 3228 unsigned int err_mask = 0; 3229 int rc; 3230 3231 dev->flags &= ~ATA_DFLAG_PIO; 3232 if (dev->xfer_shift == ATA_SHIFT_PIO) 3233 dev->flags |= ATA_DFLAG_PIO; 3234 3235 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id)) 3236 dev_err_whine = " (SET_XFERMODE skipped)"; 3237 else { 3238 if (nosetxfer) 3239 ata_dev_warn(dev, 3240 "NOSETXFER but PATA detected - can't " 3241 "skip SETXFER, might malfunction\n"); 3242 err_mask = ata_dev_set_xfermode(dev); 3243 } 3244 3245 if (err_mask & ~AC_ERR_DEV) 3246 goto fail; 3247 3248 /* revalidate */ 3249 ehc->i.flags |= ATA_EHI_POST_SETMODE; 3250 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); 3251 ehc->i.flags &= ~ATA_EHI_POST_SETMODE; 3252 if (rc) 3253 return rc; 3254 3255 if (dev->xfer_shift == ATA_SHIFT_PIO) { 3256 /* Old CFA may refuse this command, which is just fine */ 3257 if (ata_id_is_cfa(dev->id)) 3258 ign_dev_err = 1; 3259 /* Catch several broken garbage emulations plus some pre 3260 ATA devices */ 3261 if (ata_id_major_version(dev->id) == 0 && 3262 dev->pio_mode <= XFER_PIO_2) 3263 ign_dev_err = 1; 3264 /* Some very old devices and some bad newer ones fail 3265 any kind of SET_XFERMODE request but support PIO0-2 3266 timings and no IORDY */ 3267 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2) 3268 ign_dev_err = 1; 3269 } 3270 /* Early MWDMA devices do DMA but don't allow DMA mode setting. 3271 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */ 3272 if (dev->xfer_shift == ATA_SHIFT_MWDMA && 3273 dev->dma_mode == XFER_MW_DMA_0 && 3274 (dev->id[63] >> 8) & 1) 3275 ign_dev_err = 1; 3276 3277 /* if the device is actually configured correctly, ignore dev err */ 3278 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id))) 3279 ign_dev_err = 1; 3280 3281 if (err_mask & AC_ERR_DEV) { 3282 if (!ign_dev_err) 3283 goto fail; 3284 else 3285 dev_err_whine = " (device error ignored)"; 3286 } 3287 3288 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", 3289 dev->xfer_shift, (int)dev->xfer_mode); 3290 3291 ata_dev_info(dev, "configured for %s%s\n", 3292 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)), 3293 dev_err_whine); 3294 3295 return 0; 3296 3297 fail: 3298 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask); 3299 return -EIO; 3300 } 3301 3302 /** 3303 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER 3304 * @link: link on which timings will be programmed 3305 * @r_failed_dev: out parameter for failed device 3306 * 3307 * Standard implementation of the function used to tune and set 3308 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If 3309 * ata_dev_set_mode() fails, pointer to the failing device is 3310 * returned in @r_failed_dev. 3311 * 3312 * LOCKING: 3313 * PCI/etc. bus probe sem. 3314 * 3315 * RETURNS: 3316 * 0 on success, negative errno otherwise 3317 */ 3318 3319 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) 3320 { 3321 struct ata_port *ap = link->ap; 3322 struct ata_device *dev; 3323 int rc = 0, used_dma = 0, found = 0; 3324 3325 /* step 1: calculate xfer_mask */ 3326 ata_for_each_dev(dev, link, ENABLED) { 3327 unsigned long pio_mask, dma_mask; 3328 unsigned int mode_mask; 3329 3330 mode_mask = ATA_DMA_MASK_ATA; 3331 if (dev->class == ATA_DEV_ATAPI) 3332 mode_mask = ATA_DMA_MASK_ATAPI; 3333 else if (ata_id_is_cfa(dev->id)) 3334 mode_mask = ATA_DMA_MASK_CFA; 3335 3336 ata_dev_xfermask(dev); 3337 ata_force_xfermask(dev); 3338 3339 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); 3340 3341 if (libata_dma_mask & mode_mask) 3342 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, 3343 dev->udma_mask); 3344 else 3345 dma_mask = 0; 3346 3347 dev->pio_mode = ata_xfer_mask2mode(pio_mask); 3348 dev->dma_mode = ata_xfer_mask2mode(dma_mask); 3349 3350 found = 1; 3351 if (ata_dma_enabled(dev)) 3352 used_dma = 1; 3353 } 3354 if (!found) 3355 goto out; 3356 3357 /* step 2: always set host PIO timings */ 3358 ata_for_each_dev(dev, link, ENABLED) { 3359 if (dev->pio_mode == 0xff) { 3360 ata_dev_warn(dev, "no PIO support\n"); 3361 rc = -EINVAL; 3362 goto out; 3363 } 3364 3365 dev->xfer_mode = dev->pio_mode; 3366 dev->xfer_shift = ATA_SHIFT_PIO; 3367 if (ap->ops->set_piomode) 3368 ap->ops->set_piomode(ap, dev); 3369 } 3370 3371 /* step 3: set host DMA timings */ 3372 ata_for_each_dev(dev, link, ENABLED) { 3373 if (!ata_dma_enabled(dev)) 3374 continue; 3375 3376 dev->xfer_mode = dev->dma_mode; 3377 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); 3378 if (ap->ops->set_dmamode) 3379 ap->ops->set_dmamode(ap, dev); 3380 } 3381 3382 /* step 4: update devices' xfer mode */ 3383 ata_for_each_dev(dev, link, ENABLED) { 3384 rc = ata_dev_set_mode(dev); 3385 if (rc) 3386 goto out; 3387 } 3388 3389 /* Record simplex status. If we selected DMA then the other 3390 * host channels are not permitted to do so. 3391 */ 3392 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) 3393 ap->host->simplex_claimed = ap; 3394 3395 out: 3396 if (rc) 3397 *r_failed_dev = dev; 3398 return rc; 3399 } 3400 3401 /** 3402 * ata_wait_ready - wait for link to become ready 3403 * @link: link to be waited on 3404 * @deadline: deadline jiffies for the operation 3405 * @check_ready: callback to check link readiness 3406 * 3407 * Wait for @link to become ready. @check_ready should return 3408 * positive number if @link is ready, 0 if it isn't, -ENODEV if 3409 * link doesn't seem to be occupied, other errno for other error 3410 * conditions. 3411 * 3412 * Transient -ENODEV conditions are allowed for 3413 * ATA_TMOUT_FF_WAIT. 3414 * 3415 * LOCKING: 3416 * EH context. 3417 * 3418 * RETURNS: 3419 * 0 if @linke is ready before @deadline; otherwise, -errno. 3420 */ 3421 int ata_wait_ready(struct ata_link *link, unsigned long deadline, 3422 int (*check_ready)(struct ata_link *link)) 3423 { 3424 unsigned long start = jiffies; 3425 unsigned long nodev_deadline; 3426 int warned = 0; 3427 3428 /* choose which 0xff timeout to use, read comment in libata.h */ 3429 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN) 3430 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG); 3431 else 3432 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT); 3433 3434 /* Slave readiness can't be tested separately from master. On 3435 * M/S emulation configuration, this function should be called 3436 * only on the master and it will handle both master and slave. 3437 */ 3438 WARN_ON(link == link->ap->slave_link); 3439 3440 if (time_after(nodev_deadline, deadline)) 3441 nodev_deadline = deadline; 3442 3443 while (1) { 3444 unsigned long now = jiffies; 3445 int ready, tmp; 3446 3447 ready = tmp = check_ready(link); 3448 if (ready > 0) 3449 return 0; 3450 3451 /* 3452 * -ENODEV could be transient. Ignore -ENODEV if link 3453 * is online. Also, some SATA devices take a long 3454 * time to clear 0xff after reset. Wait for 3455 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't 3456 * offline. 3457 * 3458 * Note that some PATA controllers (pata_ali) explode 3459 * if status register is read more than once when 3460 * there's no device attached. 3461 */ 3462 if (ready == -ENODEV) { 3463 if (ata_link_online(link)) 3464 ready = 0; 3465 else if ((link->ap->flags & ATA_FLAG_SATA) && 3466 !ata_link_offline(link) && 3467 time_before(now, nodev_deadline)) 3468 ready = 0; 3469 } 3470 3471 if (ready) 3472 return ready; 3473 if (time_after(now, deadline)) 3474 return -EBUSY; 3475 3476 if (!warned && time_after(now, start + 5 * HZ) && 3477 (deadline - now > 3 * HZ)) { 3478 ata_link_warn(link, 3479 "link is slow to respond, please be patient " 3480 "(ready=%d)\n", tmp); 3481 warned = 1; 3482 } 3483 3484 ata_msleep(link->ap, 50); 3485 } 3486 } 3487 3488 /** 3489 * ata_wait_after_reset - wait for link to become ready after reset 3490 * @link: link to be waited on 3491 * @deadline: deadline jiffies for the operation 3492 * @check_ready: callback to check link readiness 3493 * 3494 * Wait for @link to become ready after reset. 3495 * 3496 * LOCKING: 3497 * EH context. 3498 * 3499 * RETURNS: 3500 * 0 if @linke is ready before @deadline; otherwise, -errno. 3501 */ 3502 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 3503 int (*check_ready)(struct ata_link *link)) 3504 { 3505 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET); 3506 3507 return ata_wait_ready(link, deadline, check_ready); 3508 } 3509 3510 /** 3511 * sata_link_debounce - debounce SATA phy status 3512 * @link: ATA link to debounce SATA phy status for 3513 * @params: timing parameters { interval, duratinon, timeout } in msec 3514 * @deadline: deadline jiffies for the operation 3515 * 3516 * Make sure SStatus of @link reaches stable state, determined by 3517 * holding the same value where DET is not 1 for @duration polled 3518 * every @interval, before @timeout. Timeout constraints the 3519 * beginning of the stable state. Because DET gets stuck at 1 on 3520 * some controllers after hot unplugging, this functions waits 3521 * until timeout then returns 0 if DET is stable at 1. 3522 * 3523 * @timeout is further limited by @deadline. The sooner of the 3524 * two is used. 3525 * 3526 * LOCKING: 3527 * Kernel thread context (may sleep) 3528 * 3529 * RETURNS: 3530 * 0 on success, -errno on failure. 3531 */ 3532 int sata_link_debounce(struct ata_link *link, const unsigned long *params, 3533 unsigned long deadline) 3534 { 3535 unsigned long interval = params[0]; 3536 unsigned long duration = params[1]; 3537 unsigned long last_jiffies, t; 3538 u32 last, cur; 3539 int rc; 3540 3541 t = ata_deadline(jiffies, params[2]); 3542 if (time_before(t, deadline)) 3543 deadline = t; 3544 3545 if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) 3546 return rc; 3547 cur &= 0xf; 3548 3549 last = cur; 3550 last_jiffies = jiffies; 3551 3552 while (1) { 3553 ata_msleep(link->ap, interval); 3554 if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) 3555 return rc; 3556 cur &= 0xf; 3557 3558 /* DET stable? */ 3559 if (cur == last) { 3560 if (cur == 1 && time_before(jiffies, deadline)) 3561 continue; 3562 if (time_after(jiffies, 3563 ata_deadline(last_jiffies, duration))) 3564 return 0; 3565 continue; 3566 } 3567 3568 /* unstable, start over */ 3569 last = cur; 3570 last_jiffies = jiffies; 3571 3572 /* Check deadline. If debouncing failed, return 3573 * -EPIPE to tell upper layer to lower link speed. 3574 */ 3575 if (time_after(jiffies, deadline)) 3576 return -EPIPE; 3577 } 3578 } 3579 3580 /** 3581 * sata_link_resume - resume SATA link 3582 * @link: ATA link to resume SATA 3583 * @params: timing parameters { interval, duratinon, timeout } in msec 3584 * @deadline: deadline jiffies for the operation 3585 * 3586 * Resume SATA phy @link and debounce it. 3587 * 3588 * LOCKING: 3589 * Kernel thread context (may sleep) 3590 * 3591 * RETURNS: 3592 * 0 on success, -errno on failure. 3593 */ 3594 int sata_link_resume(struct ata_link *link, const unsigned long *params, 3595 unsigned long deadline) 3596 { 3597 int tries = ATA_LINK_RESUME_TRIES; 3598 u32 scontrol, serror; 3599 int rc; 3600 3601 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 3602 return rc; 3603 3604 /* 3605 * Writes to SControl sometimes get ignored under certain 3606 * controllers (ata_piix SIDPR). Make sure DET actually is 3607 * cleared. 3608 */ 3609 do { 3610 scontrol = (scontrol & 0x0f0) | 0x300; 3611 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) 3612 return rc; 3613 /* 3614 * Some PHYs react badly if SStatus is pounded 3615 * immediately after resuming. Delay 200ms before 3616 * debouncing. 3617 */ 3618 ata_msleep(link->ap, 200); 3619 3620 /* is SControl restored correctly? */ 3621 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 3622 return rc; 3623 } while ((scontrol & 0xf0f) != 0x300 && --tries); 3624 3625 if ((scontrol & 0xf0f) != 0x300) { 3626 ata_link_warn(link, "failed to resume link (SControl %X)\n", 3627 scontrol); 3628 return 0; 3629 } 3630 3631 if (tries < ATA_LINK_RESUME_TRIES) 3632 ata_link_warn(link, "link resume succeeded after %d retries\n", 3633 ATA_LINK_RESUME_TRIES - tries); 3634 3635 if ((rc = sata_link_debounce(link, params, deadline))) 3636 return rc; 3637 3638 /* clear SError, some PHYs require this even for SRST to work */ 3639 if (!(rc = sata_scr_read(link, SCR_ERROR, &serror))) 3640 rc = sata_scr_write(link, SCR_ERROR, serror); 3641 3642 return rc != -EINVAL ? rc : 0; 3643 } 3644 3645 /** 3646 * sata_link_scr_lpm - manipulate SControl IPM and SPM fields 3647 * @link: ATA link to manipulate SControl for 3648 * @policy: LPM policy to configure 3649 * @spm_wakeup: initiate LPM transition to active state 3650 * 3651 * Manipulate the IPM field of the SControl register of @link 3652 * according to @policy. If @policy is ATA_LPM_MAX_POWER and 3653 * @spm_wakeup is %true, the SPM field is manipulated to wake up 3654 * the link. This function also clears PHYRDY_CHG before 3655 * returning. 3656 * 3657 * LOCKING: 3658 * EH context. 3659 * 3660 * RETURNS: 3661 * 0 on success, -errno otherwise. 3662 */ 3663 int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy, 3664 bool spm_wakeup) 3665 { 3666 struct ata_eh_context *ehc = &link->eh_context; 3667 bool woken_up = false; 3668 u32 scontrol; 3669 int rc; 3670 3671 rc = sata_scr_read(link, SCR_CONTROL, &scontrol); 3672 if (rc) 3673 return rc; 3674 3675 switch (policy) { 3676 case ATA_LPM_MAX_POWER: 3677 /* disable all LPM transitions */ 3678 scontrol |= (0x7 << 8); 3679 /* initiate transition to active state */ 3680 if (spm_wakeup) { 3681 scontrol |= (0x4 << 12); 3682 woken_up = true; 3683 } 3684 break; 3685 case ATA_LPM_MED_POWER: 3686 /* allow LPM to PARTIAL */ 3687 scontrol &= ~(0x1 << 8); 3688 scontrol |= (0x6 << 8); 3689 break; 3690 case ATA_LPM_MIN_POWER: 3691 if (ata_link_nr_enabled(link) > 0) 3692 /* no restrictions on LPM transitions */ 3693 scontrol &= ~(0x7 << 8); 3694 else { 3695 /* empty port, power off */ 3696 scontrol &= ~0xf; 3697 scontrol |= (0x1 << 2); 3698 } 3699 break; 3700 default: 3701 WARN_ON(1); 3702 } 3703 3704 rc = sata_scr_write(link, SCR_CONTROL, scontrol); 3705 if (rc) 3706 return rc; 3707 3708 /* give the link time to transit out of LPM state */ 3709 if (woken_up) 3710 msleep(10); 3711 3712 /* clear PHYRDY_CHG from SError */ 3713 ehc->i.serror &= ~SERR_PHYRDY_CHG; 3714 return sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG); 3715 } 3716 3717 /** 3718 * ata_std_prereset - prepare for reset 3719 * @link: ATA link to be reset 3720 * @deadline: deadline jiffies for the operation 3721 * 3722 * @link is about to be reset. Initialize it. Failure from 3723 * prereset makes libata abort whole reset sequence and give up 3724 * that port, so prereset should be best-effort. It does its 3725 * best to prepare for reset sequence but if things go wrong, it 3726 * should just whine, not fail. 3727 * 3728 * LOCKING: 3729 * Kernel thread context (may sleep) 3730 * 3731 * RETURNS: 3732 * 0 on success, -errno otherwise. 3733 */ 3734 int ata_std_prereset(struct ata_link *link, unsigned long deadline) 3735 { 3736 struct ata_port *ap = link->ap; 3737 struct ata_eh_context *ehc = &link->eh_context; 3738 const unsigned long *timing = sata_ehc_deb_timing(ehc); 3739 int rc; 3740 3741 /* if we're about to do hardreset, nothing more to do */ 3742 if (ehc->i.action & ATA_EH_HARDRESET) 3743 return 0; 3744 3745 /* if SATA, resume link */ 3746 if (ap->flags & ATA_FLAG_SATA) { 3747 rc = sata_link_resume(link, timing, deadline); 3748 /* whine about phy resume failure but proceed */ 3749 if (rc && rc != -EOPNOTSUPP) 3750 ata_link_warn(link, 3751 "failed to resume link for reset (errno=%d)\n", 3752 rc); 3753 } 3754 3755 /* no point in trying softreset on offline link */ 3756 if (ata_phys_link_offline(link)) 3757 ehc->i.action &= ~ATA_EH_SOFTRESET; 3758 3759 return 0; 3760 } 3761 3762 /** 3763 * sata_link_hardreset - reset link via SATA phy reset 3764 * @link: link to reset 3765 * @timing: timing parameters { interval, duratinon, timeout } in msec 3766 * @deadline: deadline jiffies for the operation 3767 * @online: optional out parameter indicating link onlineness 3768 * @check_ready: optional callback to check link readiness 3769 * 3770 * SATA phy-reset @link using DET bits of SControl register. 3771 * After hardreset, link readiness is waited upon using 3772 * ata_wait_ready() if @check_ready is specified. LLDs are 3773 * allowed to not specify @check_ready and wait itself after this 3774 * function returns. Device classification is LLD's 3775 * responsibility. 3776 * 3777 * *@online is set to one iff reset succeeded and @link is online 3778 * after reset. 3779 * 3780 * LOCKING: 3781 * Kernel thread context (may sleep) 3782 * 3783 * RETURNS: 3784 * 0 on success, -errno otherwise. 3785 */ 3786 int sata_link_hardreset(struct ata_link *link, const unsigned long *timing, 3787 unsigned long deadline, 3788 bool *online, int (*check_ready)(struct ata_link *)) 3789 { 3790 u32 scontrol; 3791 int rc; 3792 3793 DPRINTK("ENTER\n"); 3794 3795 if (online) 3796 *online = false; 3797 3798 if (sata_set_spd_needed(link)) { 3799 /* SATA spec says nothing about how to reconfigure 3800 * spd. To be on the safe side, turn off phy during 3801 * reconfiguration. This works for at least ICH7 AHCI 3802 * and Sil3124. 3803 */ 3804 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 3805 goto out; 3806 3807 scontrol = (scontrol & 0x0f0) | 0x304; 3808 3809 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) 3810 goto out; 3811 3812 sata_set_spd(link); 3813 } 3814 3815 /* issue phy wake/reset */ 3816 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) 3817 goto out; 3818 3819 scontrol = (scontrol & 0x0f0) | 0x301; 3820 3821 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol))) 3822 goto out; 3823 3824 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 3825 * 10.4.2 says at least 1 ms. 3826 */ 3827 ata_msleep(link->ap, 1); 3828 3829 /* bring link back */ 3830 rc = sata_link_resume(link, timing, deadline); 3831 if (rc) 3832 goto out; 3833 /* if link is offline nothing more to do */ 3834 if (ata_phys_link_offline(link)) 3835 goto out; 3836 3837 /* Link is online. From this point, -ENODEV too is an error. */ 3838 if (online) 3839 *online = true; 3840 3841 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) { 3842 /* If PMP is supported, we have to do follow-up SRST. 3843 * Some PMPs don't send D2H Reg FIS after hardreset if 3844 * the first port is empty. Wait only for 3845 * ATA_TMOUT_PMP_SRST_WAIT. 3846 */ 3847 if (check_ready) { 3848 unsigned long pmp_deadline; 3849 3850 pmp_deadline = ata_deadline(jiffies, 3851 ATA_TMOUT_PMP_SRST_WAIT); 3852 if (time_after(pmp_deadline, deadline)) 3853 pmp_deadline = deadline; 3854 ata_wait_ready(link, pmp_deadline, check_ready); 3855 } 3856 rc = -EAGAIN; 3857 goto out; 3858 } 3859 3860 rc = 0; 3861 if (check_ready) 3862 rc = ata_wait_ready(link, deadline, check_ready); 3863 out: 3864 if (rc && rc != -EAGAIN) { 3865 /* online is set iff link is online && reset succeeded */ 3866 if (online) 3867 *online = false; 3868 ata_link_err(link, "COMRESET failed (errno=%d)\n", rc); 3869 } 3870 DPRINTK("EXIT, rc=%d\n", rc); 3871 return rc; 3872 } 3873 3874 /** 3875 * sata_std_hardreset - COMRESET w/o waiting or classification 3876 * @link: link to reset 3877 * @class: resulting class of attached device 3878 * @deadline: deadline jiffies for the operation 3879 * 3880 * Standard SATA COMRESET w/o waiting or classification. 3881 * 3882 * LOCKING: 3883 * Kernel thread context (may sleep) 3884 * 3885 * RETURNS: 3886 * 0 if link offline, -EAGAIN if link online, -errno on errors. 3887 */ 3888 int sata_std_hardreset(struct ata_link *link, unsigned int *class, 3889 unsigned long deadline) 3890 { 3891 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); 3892 bool online; 3893 int rc; 3894 3895 /* do hardreset */ 3896 rc = sata_link_hardreset(link, timing, deadline, &online, NULL); 3897 return online ? -EAGAIN : rc; 3898 } 3899 3900 /** 3901 * ata_std_postreset - standard postreset callback 3902 * @link: the target ata_link 3903 * @classes: classes of attached devices 3904 * 3905 * This function is invoked after a successful reset. Note that 3906 * the device might have been reset more than once using 3907 * different reset methods before postreset is invoked. 3908 * 3909 * LOCKING: 3910 * Kernel thread context (may sleep) 3911 */ 3912 void ata_std_postreset(struct ata_link *link, unsigned int *classes) 3913 { 3914 u32 serror; 3915 3916 DPRINTK("ENTER\n"); 3917 3918 /* reset complete, clear SError */ 3919 if (!sata_scr_read(link, SCR_ERROR, &serror)) 3920 sata_scr_write(link, SCR_ERROR, serror); 3921 3922 /* print link status */ 3923 sata_print_link_status(link); 3924 3925 DPRINTK("EXIT\n"); 3926 } 3927 3928 /** 3929 * ata_dev_same_device - Determine whether new ID matches configured device 3930 * @dev: device to compare against 3931 * @new_class: class of the new device 3932 * @new_id: IDENTIFY page of the new device 3933 * 3934 * Compare @new_class and @new_id against @dev and determine 3935 * whether @dev is the device indicated by @new_class and 3936 * @new_id. 3937 * 3938 * LOCKING: 3939 * None. 3940 * 3941 * RETURNS: 3942 * 1 if @dev matches @new_class and @new_id, 0 otherwise. 3943 */ 3944 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, 3945 const u16 *new_id) 3946 { 3947 const u16 *old_id = dev->id; 3948 unsigned char model[2][ATA_ID_PROD_LEN + 1]; 3949 unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; 3950 3951 if (dev->class != new_class) { 3952 ata_dev_info(dev, "class mismatch %d != %d\n", 3953 dev->class, new_class); 3954 return 0; 3955 } 3956 3957 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); 3958 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); 3959 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); 3960 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); 3961 3962 if (strcmp(model[0], model[1])) { 3963 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n", 3964 model[0], model[1]); 3965 return 0; 3966 } 3967 3968 if (strcmp(serial[0], serial[1])) { 3969 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n", 3970 serial[0], serial[1]); 3971 return 0; 3972 } 3973 3974 return 1; 3975 } 3976 3977 /** 3978 * ata_dev_reread_id - Re-read IDENTIFY data 3979 * @dev: target ATA device 3980 * @readid_flags: read ID flags 3981 * 3982 * Re-read IDENTIFY page and make sure @dev is still attached to 3983 * the port. 3984 * 3985 * LOCKING: 3986 * Kernel thread context (may sleep) 3987 * 3988 * RETURNS: 3989 * 0 on success, negative errno otherwise 3990 */ 3991 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) 3992 { 3993 unsigned int class = dev->class; 3994 u16 *id = (void *)dev->link->ap->sector_buf; 3995 int rc; 3996 3997 /* read ID data */ 3998 rc = ata_dev_read_id(dev, &class, readid_flags, id); 3999 if (rc) 4000 return rc; 4001 4002 /* is the device still there? */ 4003 if (!ata_dev_same_device(dev, class, id)) 4004 return -ENODEV; 4005 4006 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); 4007 return 0; 4008 } 4009 4010 /** 4011 * ata_dev_revalidate - Revalidate ATA device 4012 * @dev: device to revalidate 4013 * @new_class: new class code 4014 * @readid_flags: read ID flags 4015 * 4016 * Re-read IDENTIFY page, make sure @dev is still attached to the 4017 * port and reconfigure it according to the new IDENTIFY page. 4018 * 4019 * LOCKING: 4020 * Kernel thread context (may sleep) 4021 * 4022 * RETURNS: 4023 * 0 on success, negative errno otherwise 4024 */ 4025 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, 4026 unsigned int readid_flags) 4027 { 4028 u64 n_sectors = dev->n_sectors; 4029 u64 n_native_sectors = dev->n_native_sectors; 4030 int rc; 4031 4032 if (!ata_dev_enabled(dev)) 4033 return -ENODEV; 4034 4035 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ 4036 if (ata_class_enabled(new_class) && 4037 new_class != ATA_DEV_ATA && 4038 new_class != ATA_DEV_ATAPI && 4039 new_class != ATA_DEV_ZAC && 4040 new_class != ATA_DEV_SEMB) { 4041 ata_dev_info(dev, "class mismatch %u != %u\n", 4042 dev->class, new_class); 4043 rc = -ENODEV; 4044 goto fail; 4045 } 4046 4047 /* re-read ID */ 4048 rc = ata_dev_reread_id(dev, readid_flags); 4049 if (rc) 4050 goto fail; 4051 4052 /* configure device according to the new ID */ 4053 rc = ata_dev_configure(dev); 4054 if (rc) 4055 goto fail; 4056 4057 /* verify n_sectors hasn't changed */ 4058 if (dev->class != ATA_DEV_ATA || !n_sectors || 4059 dev->n_sectors == n_sectors) 4060 return 0; 4061 4062 /* n_sectors has changed */ 4063 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n", 4064 (unsigned long long)n_sectors, 4065 (unsigned long long)dev->n_sectors); 4066 4067 /* 4068 * Something could have caused HPA to be unlocked 4069 * involuntarily. If n_native_sectors hasn't changed and the 4070 * new size matches it, keep the device. 4071 */ 4072 if (dev->n_native_sectors == n_native_sectors && 4073 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) { 4074 ata_dev_warn(dev, 4075 "new n_sectors matches native, probably " 4076 "late HPA unlock, n_sectors updated\n"); 4077 /* use the larger n_sectors */ 4078 return 0; 4079 } 4080 4081 /* 4082 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try 4083 * unlocking HPA in those cases. 4084 * 4085 * https://bugzilla.kernel.org/show_bug.cgi?id=15396 4086 */ 4087 if (dev->n_native_sectors == n_native_sectors && 4088 dev->n_sectors < n_sectors && n_sectors == n_native_sectors && 4089 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) { 4090 ata_dev_warn(dev, 4091 "old n_sectors matches native, probably " 4092 "late HPA lock, will try to unlock HPA\n"); 4093 /* try unlocking HPA */ 4094 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 4095 rc = -EIO; 4096 } else 4097 rc = -ENODEV; 4098 4099 /* restore original n_[native_]sectors and fail */ 4100 dev->n_native_sectors = n_native_sectors; 4101 dev->n_sectors = n_sectors; 4102 fail: 4103 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc); 4104 return rc; 4105 } 4106 4107 struct ata_blacklist_entry { 4108 const char *model_num; 4109 const char *model_rev; 4110 unsigned long horkage; 4111 }; 4112 4113 static const struct ata_blacklist_entry ata_device_blacklist [] = { 4114 /* Devices with DMA related problems under Linux */ 4115 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, 4116 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, 4117 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, 4118 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, 4119 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, 4120 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, 4121 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, 4122 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, 4123 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, 4124 { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA }, 4125 { "CRD-84", NULL, ATA_HORKAGE_NODMA }, 4126 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, 4127 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, 4128 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, 4129 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, 4130 { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA }, 4131 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, 4132 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, 4133 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, 4134 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, 4135 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, 4136 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, 4137 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, 4138 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, 4139 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, 4140 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, 4141 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA }, 4142 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, 4143 { " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA }, 4144 /* Odd clown on sil3726/4726 PMPs */ 4145 { "Config Disk", NULL, ATA_HORKAGE_DISABLE }, 4146 4147 /* Weird ATAPI devices */ 4148 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, 4149 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA }, 4150 { "Slimtype DVD A DS8A8SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 }, 4151 { "Slimtype DVD A DS8A9SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 }, 4152 4153 /* 4154 * Causes silent data corruption with higher max sects. 4155 * http://lkml.kernel.org/g/x49wpy40ysk.fsf@segfault.boston.devel.redhat.com 4156 */ 4157 { "ST380013AS", "3.20", ATA_HORKAGE_MAX_SEC_1024 }, 4158 4159 /* Devices we expect to fail diagnostics */ 4160 4161 /* Devices where NCQ should be avoided */ 4162 /* NCQ is slow */ 4163 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, 4164 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, 4165 /* http://thread.gmane.org/gmane.linux.ide/14907 */ 4166 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, 4167 /* NCQ is broken */ 4168 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ }, 4169 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ }, 4170 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ }, 4171 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ }, 4172 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ }, 4173 4174 /* Seagate NCQ + FLUSH CACHE firmware bug */ 4175 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | 4176 ATA_HORKAGE_FIRMWARE_WARN }, 4177 4178 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | 4179 ATA_HORKAGE_FIRMWARE_WARN }, 4180 4181 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | 4182 ATA_HORKAGE_FIRMWARE_WARN }, 4183 4184 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | 4185 ATA_HORKAGE_FIRMWARE_WARN }, 4186 4187 /* drives which fail FPDMA_AA activation (some may freeze afterwards) */ 4188 { "ST1000LM024 HN-M101MBB", "2AR10001", ATA_HORKAGE_BROKEN_FPDMA_AA }, 4189 { "ST1000LM024 HN-M101MBB", "2BA30001", ATA_HORKAGE_BROKEN_FPDMA_AA }, 4190 { "VB0250EAVER", "HPG7", ATA_HORKAGE_BROKEN_FPDMA_AA }, 4191 4192 /* Blacklist entries taken from Silicon Image 3124/3132 4193 Windows driver .inf file - also several Linux problem reports */ 4194 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, 4195 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, 4196 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, 4197 4198 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */ 4199 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, }, 4200 4201 /* devices which puke on READ_NATIVE_MAX */ 4202 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, }, 4203 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA }, 4204 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA }, 4205 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA }, 4206 4207 /* this one allows HPA unlocking but fails IOs on the area */ 4208 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA }, 4209 4210 /* Devices which report 1 sector over size HPA */ 4211 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, }, 4212 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, }, 4213 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, }, 4214 4215 /* Devices which get the IVB wrong */ 4216 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, }, 4217 /* Maybe we should just blacklist TSSTcorp... */ 4218 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, }, 4219 4220 /* Devices that do not need bridging limits applied */ 4221 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, }, 4222 { "BUFFALO HD-QSU2/R5", NULL, ATA_HORKAGE_BRIDGE_OK, }, 4223 4224 /* Devices which aren't very happy with higher link speeds */ 4225 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, }, 4226 { "Seagate FreeAgent GoFlex", NULL, ATA_HORKAGE_1_5_GBPS, }, 4227 4228 /* 4229 * Devices which choke on SETXFER. Applies only if both the 4230 * device and controller are SATA. 4231 */ 4232 { "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER }, 4233 { "PIONEER DVD-RW DVRTD08A", NULL, ATA_HORKAGE_NOSETXFER }, 4234 { "PIONEER DVD-RW DVR-215", NULL, ATA_HORKAGE_NOSETXFER }, 4235 { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER }, 4236 { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER }, 4237 4238 /* devices that don't properly handle queued TRIM commands */ 4239 { "Micron_M500_*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | 4240 ATA_HORKAGE_ZERO_AFTER_TRIM, }, 4241 { "Crucial_CT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | 4242 ATA_HORKAGE_ZERO_AFTER_TRIM, }, 4243 { "Micron_M5[15]0_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM | 4244 ATA_HORKAGE_ZERO_AFTER_TRIM, }, 4245 { "Crucial_CT*M550*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM | 4246 ATA_HORKAGE_ZERO_AFTER_TRIM, }, 4247 { "Crucial_CT*MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM | 4248 ATA_HORKAGE_ZERO_AFTER_TRIM, }, 4249 { "Samsung SSD 8*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | 4250 ATA_HORKAGE_ZERO_AFTER_TRIM, }, 4251 4252 /* devices that don't properly handle TRIM commands */ 4253 { "SuperSSpeed S238*", NULL, ATA_HORKAGE_NOTRIM, }, 4254 4255 /* 4256 * As defined, the DRAT (Deterministic Read After Trim) and RZAT 4257 * (Return Zero After Trim) flags in the ATA Command Set are 4258 * unreliable in the sense that they only define what happens if 4259 * the device successfully executed the DSM TRIM command. TRIM 4260 * is only advisory, however, and the device is free to silently 4261 * ignore all or parts of the request. 4262 * 4263 * Whitelist drives that are known to reliably return zeroes 4264 * after TRIM. 4265 */ 4266 4267 /* 4268 * The intel 510 drive has buggy DRAT/RZAT. Explicitly exclude 4269 * that model before whitelisting all other intel SSDs. 4270 */ 4271 { "INTEL*SSDSC2MH*", NULL, 0, }, 4272 4273 { "Micron*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, }, 4274 { "Crucial*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, }, 4275 { "INTEL*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, }, 4276 { "SSD*INTEL*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, }, 4277 { "Samsung*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, }, 4278 { "SAMSUNG*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, }, 4279 { "ST[1248][0248]0[FH]*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, }, 4280 4281 /* 4282 * Some WD SATA-I drives spin up and down erratically when the link 4283 * is put into the slumber mode. We don't have full list of the 4284 * affected devices. Disable LPM if the device matches one of the 4285 * known prefixes and is SATA-1. As a side effect LPM partial is 4286 * lost too. 4287 * 4288 * https://bugzilla.kernel.org/show_bug.cgi?id=57211 4289 */ 4290 { "WDC WD800JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, 4291 { "WDC WD1200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, 4292 { "WDC WD1600JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, 4293 { "WDC WD2000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, 4294 { "WDC WD2500JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, 4295 { "WDC WD3000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, 4296 { "WDC WD3200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, 4297 4298 /* End Marker */ 4299 { } 4300 }; 4301 4302 static unsigned long ata_dev_blacklisted(const struct ata_device *dev) 4303 { 4304 unsigned char model_num[ATA_ID_PROD_LEN + 1]; 4305 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; 4306 const struct ata_blacklist_entry *ad = ata_device_blacklist; 4307 4308 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 4309 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); 4310 4311 while (ad->model_num) { 4312 if (glob_match(ad->model_num, model_num)) { 4313 if (ad->model_rev == NULL) 4314 return ad->horkage; 4315 if (glob_match(ad->model_rev, model_rev)) 4316 return ad->horkage; 4317 } 4318 ad++; 4319 } 4320 return 0; 4321 } 4322 4323 static int ata_dma_blacklisted(const struct ata_device *dev) 4324 { 4325 /* We don't support polling DMA. 4326 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) 4327 * if the LLDD handles only interrupts in the HSM_ST_LAST state. 4328 */ 4329 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && 4330 (dev->flags & ATA_DFLAG_CDB_INTR)) 4331 return 1; 4332 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; 4333 } 4334 4335 /** 4336 * ata_is_40wire - check drive side detection 4337 * @dev: device 4338 * 4339 * Perform drive side detection decoding, allowing for device vendors 4340 * who can't follow the documentation. 4341 */ 4342 4343 static int ata_is_40wire(struct ata_device *dev) 4344 { 4345 if (dev->horkage & ATA_HORKAGE_IVB) 4346 return ata_drive_40wire_relaxed(dev->id); 4347 return ata_drive_40wire(dev->id); 4348 } 4349 4350 /** 4351 * cable_is_40wire - 40/80/SATA decider 4352 * @ap: port to consider 4353 * 4354 * This function encapsulates the policy for speed management 4355 * in one place. At the moment we don't cache the result but 4356 * there is a good case for setting ap->cbl to the result when 4357 * we are called with unknown cables (and figuring out if it 4358 * impacts hotplug at all). 4359 * 4360 * Return 1 if the cable appears to be 40 wire. 4361 */ 4362 4363 static int cable_is_40wire(struct ata_port *ap) 4364 { 4365 struct ata_link *link; 4366 struct ata_device *dev; 4367 4368 /* If the controller thinks we are 40 wire, we are. */ 4369 if (ap->cbl == ATA_CBL_PATA40) 4370 return 1; 4371 4372 /* If the controller thinks we are 80 wire, we are. */ 4373 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA) 4374 return 0; 4375 4376 /* If the system is known to be 40 wire short cable (eg 4377 * laptop), then we allow 80 wire modes even if the drive 4378 * isn't sure. 4379 */ 4380 if (ap->cbl == ATA_CBL_PATA40_SHORT) 4381 return 0; 4382 4383 /* If the controller doesn't know, we scan. 4384 * 4385 * Note: We look for all 40 wire detects at this point. Any 4386 * 80 wire detect is taken to be 80 wire cable because 4387 * - in many setups only the one drive (slave if present) will 4388 * give a valid detect 4389 * - if you have a non detect capable drive you don't want it 4390 * to colour the choice 4391 */ 4392 ata_for_each_link(link, ap, EDGE) { 4393 ata_for_each_dev(dev, link, ENABLED) { 4394 if (!ata_is_40wire(dev)) 4395 return 0; 4396 } 4397 } 4398 return 1; 4399 } 4400 4401 /** 4402 * ata_dev_xfermask - Compute supported xfermask of the given device 4403 * @dev: Device to compute xfermask for 4404 * 4405 * Compute supported xfermask of @dev and store it in 4406 * dev->*_mask. This function is responsible for applying all 4407 * known limits including host controller limits, device 4408 * blacklist, etc... 4409 * 4410 * LOCKING: 4411 * None. 4412 */ 4413 static void ata_dev_xfermask(struct ata_device *dev) 4414 { 4415 struct ata_link *link = dev->link; 4416 struct ata_port *ap = link->ap; 4417 struct ata_host *host = ap->host; 4418 unsigned long xfer_mask; 4419 4420 /* controller modes available */ 4421 xfer_mask = ata_pack_xfermask(ap->pio_mask, 4422 ap->mwdma_mask, ap->udma_mask); 4423 4424 /* drive modes available */ 4425 xfer_mask &= ata_pack_xfermask(dev->pio_mask, 4426 dev->mwdma_mask, dev->udma_mask); 4427 xfer_mask &= ata_id_xfermask(dev->id); 4428 4429 /* 4430 * CFA Advanced TrueIDE timings are not allowed on a shared 4431 * cable 4432 */ 4433 if (ata_dev_pair(dev)) { 4434 /* No PIO5 or PIO6 */ 4435 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); 4436 /* No MWDMA3 or MWDMA 4 */ 4437 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); 4438 } 4439 4440 if (ata_dma_blacklisted(dev)) { 4441 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 4442 ata_dev_warn(dev, 4443 "device is on DMA blacklist, disabling DMA\n"); 4444 } 4445 4446 if ((host->flags & ATA_HOST_SIMPLEX) && 4447 host->simplex_claimed && host->simplex_claimed != ap) { 4448 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 4449 ata_dev_warn(dev, 4450 "simplex DMA is claimed by other device, disabling DMA\n"); 4451 } 4452 4453 if (ap->flags & ATA_FLAG_NO_IORDY) 4454 xfer_mask &= ata_pio_mask_no_iordy(dev); 4455 4456 if (ap->ops->mode_filter) 4457 xfer_mask = ap->ops->mode_filter(dev, xfer_mask); 4458 4459 /* Apply cable rule here. Don't apply it early because when 4460 * we handle hot plug the cable type can itself change. 4461 * Check this last so that we know if the transfer rate was 4462 * solely limited by the cable. 4463 * Unknown or 80 wire cables reported host side are checked 4464 * drive side as well. Cases where we know a 40wire cable 4465 * is used safely for 80 are not checked here. 4466 */ 4467 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) 4468 /* UDMA/44 or higher would be available */ 4469 if (cable_is_40wire(ap)) { 4470 ata_dev_warn(dev, 4471 "limited to UDMA/33 due to 40-wire cable\n"); 4472 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); 4473 } 4474 4475 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, 4476 &dev->mwdma_mask, &dev->udma_mask); 4477 } 4478 4479 /** 4480 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command 4481 * @dev: Device to which command will be sent 4482 * 4483 * Issue SET FEATURES - XFER MODE command to device @dev 4484 * on port @ap. 4485 * 4486 * LOCKING: 4487 * PCI/etc. bus probe sem. 4488 * 4489 * RETURNS: 4490 * 0 on success, AC_ERR_* mask otherwise. 4491 */ 4492 4493 static unsigned int ata_dev_set_xfermode(struct ata_device *dev) 4494 { 4495 struct ata_taskfile tf; 4496 unsigned int err_mask; 4497 4498 /* set up set-features taskfile */ 4499 DPRINTK("set features - xfer mode\n"); 4500 4501 /* Some controllers and ATAPI devices show flaky interrupt 4502 * behavior after setting xfer mode. Use polling instead. 4503 */ 4504 ata_tf_init(dev, &tf); 4505 tf.command = ATA_CMD_SET_FEATURES; 4506 tf.feature = SETFEATURES_XFER; 4507 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; 4508 tf.protocol = ATA_PROT_NODATA; 4509 /* If we are using IORDY we must send the mode setting command */ 4510 if (ata_pio_need_iordy(dev)) 4511 tf.nsect = dev->xfer_mode; 4512 /* If the device has IORDY and the controller does not - turn it off */ 4513 else if (ata_id_has_iordy(dev->id)) 4514 tf.nsect = 0x01; 4515 else /* In the ancient relic department - skip all of this */ 4516 return 0; 4517 4518 /* On some disks, this command causes spin-up, so we need longer timeout */ 4519 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 15000); 4520 4521 DPRINTK("EXIT, err_mask=%x\n", err_mask); 4522 return err_mask; 4523 } 4524 4525 /** 4526 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES 4527 * @dev: Device to which command will be sent 4528 * @enable: Whether to enable or disable the feature 4529 * @feature: The sector count represents the feature to set 4530 * 4531 * Issue SET FEATURES - SATA FEATURES command to device @dev 4532 * on port @ap with sector count 4533 * 4534 * LOCKING: 4535 * PCI/etc. bus probe sem. 4536 * 4537 * RETURNS: 4538 * 0 on success, AC_ERR_* mask otherwise. 4539 */ 4540 unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, u8 feature) 4541 { 4542 struct ata_taskfile tf; 4543 unsigned int err_mask; 4544 4545 /* set up set-features taskfile */ 4546 DPRINTK("set features - SATA features\n"); 4547 4548 ata_tf_init(dev, &tf); 4549 tf.command = ATA_CMD_SET_FEATURES; 4550 tf.feature = enable; 4551 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 4552 tf.protocol = ATA_PROT_NODATA; 4553 tf.nsect = feature; 4554 4555 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 4556 4557 DPRINTK("EXIT, err_mask=%x\n", err_mask); 4558 return err_mask; 4559 } 4560 EXPORT_SYMBOL_GPL(ata_dev_set_feature); 4561 4562 /** 4563 * ata_dev_init_params - Issue INIT DEV PARAMS command 4564 * @dev: Device to which command will be sent 4565 * @heads: Number of heads (taskfile parameter) 4566 * @sectors: Number of sectors (taskfile parameter) 4567 * 4568 * LOCKING: 4569 * Kernel thread context (may sleep) 4570 * 4571 * RETURNS: 4572 * 0 on success, AC_ERR_* mask otherwise. 4573 */ 4574 static unsigned int ata_dev_init_params(struct ata_device *dev, 4575 u16 heads, u16 sectors) 4576 { 4577 struct ata_taskfile tf; 4578 unsigned int err_mask; 4579 4580 /* Number of sectors per track 1-255. Number of heads 1-16 */ 4581 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) 4582 return AC_ERR_INVALID; 4583 4584 /* set up init dev params taskfile */ 4585 DPRINTK("init dev params \n"); 4586 4587 ata_tf_init(dev, &tf); 4588 tf.command = ATA_CMD_INIT_DEV_PARAMS; 4589 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 4590 tf.protocol = ATA_PROT_NODATA; 4591 tf.nsect = sectors; 4592 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ 4593 4594 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 4595 /* A clean abort indicates an original or just out of spec drive 4596 and we should continue as we issue the setup based on the 4597 drive reported working geometry */ 4598 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) 4599 err_mask = 0; 4600 4601 DPRINTK("EXIT, err_mask=%x\n", err_mask); 4602 return err_mask; 4603 } 4604 4605 /** 4606 * ata_sg_clean - Unmap DMA memory associated with command 4607 * @qc: Command containing DMA memory to be released 4608 * 4609 * Unmap all mapped DMA memory associated with this command. 4610 * 4611 * LOCKING: 4612 * spin_lock_irqsave(host lock) 4613 */ 4614 void ata_sg_clean(struct ata_queued_cmd *qc) 4615 { 4616 struct ata_port *ap = qc->ap; 4617 struct scatterlist *sg = qc->sg; 4618 int dir = qc->dma_dir; 4619 4620 WARN_ON_ONCE(sg == NULL); 4621 4622 VPRINTK("unmapping %u sg elements\n", qc->n_elem); 4623 4624 if (qc->n_elem) 4625 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir); 4626 4627 qc->flags &= ~ATA_QCFLAG_DMAMAP; 4628 qc->sg = NULL; 4629 } 4630 4631 /** 4632 * atapi_check_dma - Check whether ATAPI DMA can be supported 4633 * @qc: Metadata associated with taskfile to check 4634 * 4635 * Allow low-level driver to filter ATA PACKET commands, returning 4636 * a status indicating whether or not it is OK to use DMA for the 4637 * supplied PACKET command. 4638 * 4639 * LOCKING: 4640 * spin_lock_irqsave(host lock) 4641 * 4642 * RETURNS: 0 when ATAPI DMA can be used 4643 * nonzero otherwise 4644 */ 4645 int atapi_check_dma(struct ata_queued_cmd *qc) 4646 { 4647 struct ata_port *ap = qc->ap; 4648 4649 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a 4650 * few ATAPI devices choke on such DMA requests. 4651 */ 4652 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) && 4653 unlikely(qc->nbytes & 15)) 4654 return 1; 4655 4656 if (ap->ops->check_atapi_dma) 4657 return ap->ops->check_atapi_dma(qc); 4658 4659 return 0; 4660 } 4661 4662 /** 4663 * ata_std_qc_defer - Check whether a qc needs to be deferred 4664 * @qc: ATA command in question 4665 * 4666 * Non-NCQ commands cannot run with any other command, NCQ or 4667 * not. As upper layer only knows the queue depth, we are 4668 * responsible for maintaining exclusion. This function checks 4669 * whether a new command @qc can be issued. 4670 * 4671 * LOCKING: 4672 * spin_lock_irqsave(host lock) 4673 * 4674 * RETURNS: 4675 * ATA_DEFER_* if deferring is needed, 0 otherwise. 4676 */ 4677 int ata_std_qc_defer(struct ata_queued_cmd *qc) 4678 { 4679 struct ata_link *link = qc->dev->link; 4680 4681 if (qc->tf.protocol == ATA_PROT_NCQ) { 4682 if (!ata_tag_valid(link->active_tag)) 4683 return 0; 4684 } else { 4685 if (!ata_tag_valid(link->active_tag) && !link->sactive) 4686 return 0; 4687 } 4688 4689 return ATA_DEFER_LINK; 4690 } 4691 4692 void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } 4693 4694 /** 4695 * ata_sg_init - Associate command with scatter-gather table. 4696 * @qc: Command to be associated 4697 * @sg: Scatter-gather table. 4698 * @n_elem: Number of elements in s/g table. 4699 * 4700 * Initialize the data-related elements of queued_cmd @qc 4701 * to point to a scatter-gather table @sg, containing @n_elem 4702 * elements. 4703 * 4704 * LOCKING: 4705 * spin_lock_irqsave(host lock) 4706 */ 4707 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 4708 unsigned int n_elem) 4709 { 4710 qc->sg = sg; 4711 qc->n_elem = n_elem; 4712 qc->cursg = qc->sg; 4713 } 4714 4715 /** 4716 * ata_sg_setup - DMA-map the scatter-gather table associated with a command. 4717 * @qc: Command with scatter-gather table to be mapped. 4718 * 4719 * DMA-map the scatter-gather table associated with queued_cmd @qc. 4720 * 4721 * LOCKING: 4722 * spin_lock_irqsave(host lock) 4723 * 4724 * RETURNS: 4725 * Zero on success, negative on error. 4726 * 4727 */ 4728 static int ata_sg_setup(struct ata_queued_cmd *qc) 4729 { 4730 struct ata_port *ap = qc->ap; 4731 unsigned int n_elem; 4732 4733 VPRINTK("ENTER, ata%u\n", ap->print_id); 4734 4735 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir); 4736 if (n_elem < 1) 4737 return -1; 4738 4739 DPRINTK("%d sg elements mapped\n", n_elem); 4740 qc->orig_n_elem = qc->n_elem; 4741 qc->n_elem = n_elem; 4742 qc->flags |= ATA_QCFLAG_DMAMAP; 4743 4744 return 0; 4745 } 4746 4747 /** 4748 * swap_buf_le16 - swap halves of 16-bit words in place 4749 * @buf: Buffer to swap 4750 * @buf_words: Number of 16-bit words in buffer. 4751 * 4752 * Swap halves of 16-bit words if needed to convert from 4753 * little-endian byte order to native cpu byte order, or 4754 * vice-versa. 4755 * 4756 * LOCKING: 4757 * Inherited from caller. 4758 */ 4759 void swap_buf_le16(u16 *buf, unsigned int buf_words) 4760 { 4761 #ifdef __BIG_ENDIAN 4762 unsigned int i; 4763 4764 for (i = 0; i < buf_words; i++) 4765 buf[i] = le16_to_cpu(buf[i]); 4766 #endif /* __BIG_ENDIAN */ 4767 } 4768 4769 /** 4770 * ata_qc_new_init - Request an available ATA command, and initialize it 4771 * @dev: Device from whom we request an available command structure 4772 * 4773 * LOCKING: 4774 * None. 4775 */ 4776 4777 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev, int tag) 4778 { 4779 struct ata_port *ap = dev->link->ap; 4780 struct ata_queued_cmd *qc; 4781 4782 /* no command while frozen */ 4783 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) 4784 return NULL; 4785 4786 /* libsas case */ 4787 if (ap->flags & ATA_FLAG_SAS_HOST) { 4788 tag = ata_sas_allocate_tag(ap); 4789 if (tag < 0) 4790 return NULL; 4791 } 4792 4793 qc = __ata_qc_from_tag(ap, tag); 4794 qc->tag = tag; 4795 qc->scsicmd = NULL; 4796 qc->ap = ap; 4797 qc->dev = dev; 4798 4799 ata_qc_reinit(qc); 4800 4801 return qc; 4802 } 4803 4804 /** 4805 * ata_qc_free - free unused ata_queued_cmd 4806 * @qc: Command to complete 4807 * 4808 * Designed to free unused ata_queued_cmd object 4809 * in case something prevents using it. 4810 * 4811 * LOCKING: 4812 * spin_lock_irqsave(host lock) 4813 */ 4814 void ata_qc_free(struct ata_queued_cmd *qc) 4815 { 4816 struct ata_port *ap; 4817 unsigned int tag; 4818 4819 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 4820 ap = qc->ap; 4821 4822 qc->flags = 0; 4823 tag = qc->tag; 4824 if (likely(ata_tag_valid(tag))) { 4825 qc->tag = ATA_TAG_POISON; 4826 if (ap->flags & ATA_FLAG_SAS_HOST) 4827 ata_sas_free_tag(tag, ap); 4828 } 4829 } 4830 4831 void __ata_qc_complete(struct ata_queued_cmd *qc) 4832 { 4833 struct ata_port *ap; 4834 struct ata_link *link; 4835 4836 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 4837 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE)); 4838 ap = qc->ap; 4839 link = qc->dev->link; 4840 4841 if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) 4842 ata_sg_clean(qc); 4843 4844 /* command should be marked inactive atomically with qc completion */ 4845 if (qc->tf.protocol == ATA_PROT_NCQ) { 4846 link->sactive &= ~(1 << qc->tag); 4847 if (!link->sactive) 4848 ap->nr_active_links--; 4849 } else { 4850 link->active_tag = ATA_TAG_POISON; 4851 ap->nr_active_links--; 4852 } 4853 4854 /* clear exclusive status */ 4855 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && 4856 ap->excl_link == link)) 4857 ap->excl_link = NULL; 4858 4859 /* atapi: mark qc as inactive to prevent the interrupt handler 4860 * from completing the command twice later, before the error handler 4861 * is called. (when rc != 0 and atapi request sense is needed) 4862 */ 4863 qc->flags &= ~ATA_QCFLAG_ACTIVE; 4864 ap->qc_active &= ~(1 << qc->tag); 4865 4866 /* call completion callback */ 4867 qc->complete_fn(qc); 4868 } 4869 4870 static void fill_result_tf(struct ata_queued_cmd *qc) 4871 { 4872 struct ata_port *ap = qc->ap; 4873 4874 qc->result_tf.flags = qc->tf.flags; 4875 ap->ops->qc_fill_rtf(qc); 4876 } 4877 4878 static void ata_verify_xfer(struct ata_queued_cmd *qc) 4879 { 4880 struct ata_device *dev = qc->dev; 4881 4882 if (ata_is_nodata(qc->tf.protocol)) 4883 return; 4884 4885 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol)) 4886 return; 4887 4888 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER; 4889 } 4890 4891 /** 4892 * ata_qc_complete - Complete an active ATA command 4893 * @qc: Command to complete 4894 * 4895 * Indicate to the mid and upper layers that an ATA command has 4896 * completed, with either an ok or not-ok status. 4897 * 4898 * Refrain from calling this function multiple times when 4899 * successfully completing multiple NCQ commands. 4900 * ata_qc_complete_multiple() should be used instead, which will 4901 * properly update IRQ expect state. 4902 * 4903 * LOCKING: 4904 * spin_lock_irqsave(host lock) 4905 */ 4906 void ata_qc_complete(struct ata_queued_cmd *qc) 4907 { 4908 struct ata_port *ap = qc->ap; 4909 4910 /* XXX: New EH and old EH use different mechanisms to 4911 * synchronize EH with regular execution path. 4912 * 4913 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. 4914 * Normal execution path is responsible for not accessing a 4915 * failed qc. libata core enforces the rule by returning NULL 4916 * from ata_qc_from_tag() for failed qcs. 4917 * 4918 * Old EH depends on ata_qc_complete() nullifying completion 4919 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does 4920 * not synchronize with interrupt handler. Only PIO task is 4921 * taken care of. 4922 */ 4923 if (ap->ops->error_handler) { 4924 struct ata_device *dev = qc->dev; 4925 struct ata_eh_info *ehi = &dev->link->eh_info; 4926 4927 if (unlikely(qc->err_mask)) 4928 qc->flags |= ATA_QCFLAG_FAILED; 4929 4930 /* 4931 * Finish internal commands without any further processing 4932 * and always with the result TF filled. 4933 */ 4934 if (unlikely(ata_tag_internal(qc->tag))) { 4935 fill_result_tf(qc); 4936 trace_ata_qc_complete_internal(qc); 4937 __ata_qc_complete(qc); 4938 return; 4939 } 4940 4941 /* 4942 * Non-internal qc has failed. Fill the result TF and 4943 * summon EH. 4944 */ 4945 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { 4946 fill_result_tf(qc); 4947 trace_ata_qc_complete_failed(qc); 4948 ata_qc_schedule_eh(qc); 4949 return; 4950 } 4951 4952 WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN); 4953 4954 /* read result TF if requested */ 4955 if (qc->flags & ATA_QCFLAG_RESULT_TF) 4956 fill_result_tf(qc); 4957 4958 trace_ata_qc_complete_done(qc); 4959 /* Some commands need post-processing after successful 4960 * completion. 4961 */ 4962 switch (qc->tf.command) { 4963 case ATA_CMD_SET_FEATURES: 4964 if (qc->tf.feature != SETFEATURES_WC_ON && 4965 qc->tf.feature != SETFEATURES_WC_OFF) 4966 break; 4967 /* fall through */ 4968 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */ 4969 case ATA_CMD_SET_MULTI: /* multi_count changed */ 4970 /* revalidate device */ 4971 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE; 4972 ata_port_schedule_eh(ap); 4973 break; 4974 4975 case ATA_CMD_SLEEP: 4976 dev->flags |= ATA_DFLAG_SLEEPING; 4977 break; 4978 } 4979 4980 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) 4981 ata_verify_xfer(qc); 4982 4983 __ata_qc_complete(qc); 4984 } else { 4985 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) 4986 return; 4987 4988 /* read result TF if failed or requested */ 4989 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) 4990 fill_result_tf(qc); 4991 4992 __ata_qc_complete(qc); 4993 } 4994 } 4995 4996 /** 4997 * ata_qc_complete_multiple - Complete multiple qcs successfully 4998 * @ap: port in question 4999 * @qc_active: new qc_active mask 5000 * 5001 * Complete in-flight commands. This functions is meant to be 5002 * called from low-level driver's interrupt routine to complete 5003 * requests normally. ap->qc_active and @qc_active is compared 5004 * and commands are completed accordingly. 5005 * 5006 * Always use this function when completing multiple NCQ commands 5007 * from IRQ handlers instead of calling ata_qc_complete() 5008 * multiple times to keep IRQ expect status properly in sync. 5009 * 5010 * LOCKING: 5011 * spin_lock_irqsave(host lock) 5012 * 5013 * RETURNS: 5014 * Number of completed commands on success, -errno otherwise. 5015 */ 5016 int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active) 5017 { 5018 int nr_done = 0; 5019 u32 done_mask; 5020 5021 done_mask = ap->qc_active ^ qc_active; 5022 5023 if (unlikely(done_mask & qc_active)) { 5024 ata_port_err(ap, "illegal qc_active transition (%08x->%08x)\n", 5025 ap->qc_active, qc_active); 5026 return -EINVAL; 5027 } 5028 5029 while (done_mask) { 5030 struct ata_queued_cmd *qc; 5031 unsigned int tag = __ffs(done_mask); 5032 5033 qc = ata_qc_from_tag(ap, tag); 5034 if (qc) { 5035 ata_qc_complete(qc); 5036 nr_done++; 5037 } 5038 done_mask &= ~(1 << tag); 5039 } 5040 5041 return nr_done; 5042 } 5043 5044 /** 5045 * ata_qc_issue - issue taskfile to device 5046 * @qc: command to issue to device 5047 * 5048 * Prepare an ATA command to submission to device. 5049 * This includes mapping the data into a DMA-able 5050 * area, filling in the S/G table, and finally 5051 * writing the taskfile to hardware, starting the command. 5052 * 5053 * LOCKING: 5054 * spin_lock_irqsave(host lock) 5055 */ 5056 void ata_qc_issue(struct ata_queued_cmd *qc) 5057 { 5058 struct ata_port *ap = qc->ap; 5059 struct ata_link *link = qc->dev->link; 5060 u8 prot = qc->tf.protocol; 5061 5062 /* Make sure only one non-NCQ command is outstanding. The 5063 * check is skipped for old EH because it reuses active qc to 5064 * request ATAPI sense. 5065 */ 5066 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag)); 5067 5068 if (ata_is_ncq(prot)) { 5069 WARN_ON_ONCE(link->sactive & (1 << qc->tag)); 5070 5071 if (!link->sactive) 5072 ap->nr_active_links++; 5073 link->sactive |= 1 << qc->tag; 5074 } else { 5075 WARN_ON_ONCE(link->sactive); 5076 5077 ap->nr_active_links++; 5078 link->active_tag = qc->tag; 5079 } 5080 5081 qc->flags |= ATA_QCFLAG_ACTIVE; 5082 ap->qc_active |= 1 << qc->tag; 5083 5084 /* 5085 * We guarantee to LLDs that they will have at least one 5086 * non-zero sg if the command is a data command. 5087 */ 5088 if (WARN_ON_ONCE(ata_is_data(prot) && 5089 (!qc->sg || !qc->n_elem || !qc->nbytes))) 5090 goto sys_err; 5091 5092 if (ata_is_dma(prot) || (ata_is_pio(prot) && 5093 (ap->flags & ATA_FLAG_PIO_DMA))) 5094 if (ata_sg_setup(qc)) 5095 goto sys_err; 5096 5097 /* if device is sleeping, schedule reset and abort the link */ 5098 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) { 5099 link->eh_info.action |= ATA_EH_RESET; 5100 ata_ehi_push_desc(&link->eh_info, "waking up from sleep"); 5101 ata_link_abort(link); 5102 return; 5103 } 5104 5105 ap->ops->qc_prep(qc); 5106 trace_ata_qc_issue(qc); 5107 qc->err_mask |= ap->ops->qc_issue(qc); 5108 if (unlikely(qc->err_mask)) 5109 goto err; 5110 return; 5111 5112 sys_err: 5113 qc->err_mask |= AC_ERR_SYSTEM; 5114 err: 5115 ata_qc_complete(qc); 5116 } 5117 5118 /** 5119 * sata_scr_valid - test whether SCRs are accessible 5120 * @link: ATA link to test SCR accessibility for 5121 * 5122 * Test whether SCRs are accessible for @link. 5123 * 5124 * LOCKING: 5125 * None. 5126 * 5127 * RETURNS: 5128 * 1 if SCRs are accessible, 0 otherwise. 5129 */ 5130 int sata_scr_valid(struct ata_link *link) 5131 { 5132 struct ata_port *ap = link->ap; 5133 5134 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; 5135 } 5136 5137 /** 5138 * sata_scr_read - read SCR register of the specified port 5139 * @link: ATA link to read SCR for 5140 * @reg: SCR to read 5141 * @val: Place to store read value 5142 * 5143 * Read SCR register @reg of @link into *@val. This function is 5144 * guaranteed to succeed if @link is ap->link, the cable type of 5145 * the port is SATA and the port implements ->scr_read. 5146 * 5147 * LOCKING: 5148 * None if @link is ap->link. Kernel thread context otherwise. 5149 * 5150 * RETURNS: 5151 * 0 on success, negative errno on failure. 5152 */ 5153 int sata_scr_read(struct ata_link *link, int reg, u32 *val) 5154 { 5155 if (ata_is_host_link(link)) { 5156 if (sata_scr_valid(link)) 5157 return link->ap->ops->scr_read(link, reg, val); 5158 return -EOPNOTSUPP; 5159 } 5160 5161 return sata_pmp_scr_read(link, reg, val); 5162 } 5163 5164 /** 5165 * sata_scr_write - write SCR register of the specified port 5166 * @link: ATA link to write SCR for 5167 * @reg: SCR to write 5168 * @val: value to write 5169 * 5170 * Write @val to SCR register @reg of @link. This function is 5171 * guaranteed to succeed if @link is ap->link, the cable type of 5172 * the port is SATA and the port implements ->scr_read. 5173 * 5174 * LOCKING: 5175 * None if @link is ap->link. Kernel thread context otherwise. 5176 * 5177 * RETURNS: 5178 * 0 on success, negative errno on failure. 5179 */ 5180 int sata_scr_write(struct ata_link *link, int reg, u32 val) 5181 { 5182 if (ata_is_host_link(link)) { 5183 if (sata_scr_valid(link)) 5184 return link->ap->ops->scr_write(link, reg, val); 5185 return -EOPNOTSUPP; 5186 } 5187 5188 return sata_pmp_scr_write(link, reg, val); 5189 } 5190 5191 /** 5192 * sata_scr_write_flush - write SCR register of the specified port and flush 5193 * @link: ATA link to write SCR for 5194 * @reg: SCR to write 5195 * @val: value to write 5196 * 5197 * This function is identical to sata_scr_write() except that this 5198 * function performs flush after writing to the register. 5199 * 5200 * LOCKING: 5201 * None if @link is ap->link. Kernel thread context otherwise. 5202 * 5203 * RETURNS: 5204 * 0 on success, negative errno on failure. 5205 */ 5206 int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) 5207 { 5208 if (ata_is_host_link(link)) { 5209 int rc; 5210 5211 if (sata_scr_valid(link)) { 5212 rc = link->ap->ops->scr_write(link, reg, val); 5213 if (rc == 0) 5214 rc = link->ap->ops->scr_read(link, reg, &val); 5215 return rc; 5216 } 5217 return -EOPNOTSUPP; 5218 } 5219 5220 return sata_pmp_scr_write(link, reg, val); 5221 } 5222 5223 /** 5224 * ata_phys_link_online - test whether the given link is online 5225 * @link: ATA link to test 5226 * 5227 * Test whether @link is online. Note that this function returns 5228 * 0 if online status of @link cannot be obtained, so 5229 * ata_link_online(link) != !ata_link_offline(link). 5230 * 5231 * LOCKING: 5232 * None. 5233 * 5234 * RETURNS: 5235 * True if the port online status is available and online. 5236 */ 5237 bool ata_phys_link_online(struct ata_link *link) 5238 { 5239 u32 sstatus; 5240 5241 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && 5242 ata_sstatus_online(sstatus)) 5243 return true; 5244 return false; 5245 } 5246 5247 /** 5248 * ata_phys_link_offline - test whether the given link is offline 5249 * @link: ATA link to test 5250 * 5251 * Test whether @link is offline. Note that this function 5252 * returns 0 if offline status of @link cannot be obtained, so 5253 * ata_link_online(link) != !ata_link_offline(link). 5254 * 5255 * LOCKING: 5256 * None. 5257 * 5258 * RETURNS: 5259 * True if the port offline status is available and offline. 5260 */ 5261 bool ata_phys_link_offline(struct ata_link *link) 5262 { 5263 u32 sstatus; 5264 5265 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && 5266 !ata_sstatus_online(sstatus)) 5267 return true; 5268 return false; 5269 } 5270 5271 /** 5272 * ata_link_online - test whether the given link is online 5273 * @link: ATA link to test 5274 * 5275 * Test whether @link is online. This is identical to 5276 * ata_phys_link_online() when there's no slave link. When 5277 * there's a slave link, this function should only be called on 5278 * the master link and will return true if any of M/S links is 5279 * online. 5280 * 5281 * LOCKING: 5282 * None. 5283 * 5284 * RETURNS: 5285 * True if the port online status is available and online. 5286 */ 5287 bool ata_link_online(struct ata_link *link) 5288 { 5289 struct ata_link *slave = link->ap->slave_link; 5290 5291 WARN_ON(link == slave); /* shouldn't be called on slave link */ 5292 5293 return ata_phys_link_online(link) || 5294 (slave && ata_phys_link_online(slave)); 5295 } 5296 5297 /** 5298 * ata_link_offline - test whether the given link is offline 5299 * @link: ATA link to test 5300 * 5301 * Test whether @link is offline. This is identical to 5302 * ata_phys_link_offline() when there's no slave link. When 5303 * there's a slave link, this function should only be called on 5304 * the master link and will return true if both M/S links are 5305 * offline. 5306 * 5307 * LOCKING: 5308 * None. 5309 * 5310 * RETURNS: 5311 * True if the port offline status is available and offline. 5312 */ 5313 bool ata_link_offline(struct ata_link *link) 5314 { 5315 struct ata_link *slave = link->ap->slave_link; 5316 5317 WARN_ON(link == slave); /* shouldn't be called on slave link */ 5318 5319 return ata_phys_link_offline(link) && 5320 (!slave || ata_phys_link_offline(slave)); 5321 } 5322 5323 #ifdef CONFIG_PM 5324 static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg, 5325 unsigned int action, unsigned int ehi_flags, 5326 bool async) 5327 { 5328 struct ata_link *link; 5329 unsigned long flags; 5330 5331 /* Previous resume operation might still be in 5332 * progress. Wait for PM_PENDING to clear. 5333 */ 5334 if (ap->pflags & ATA_PFLAG_PM_PENDING) { 5335 ata_port_wait_eh(ap); 5336 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 5337 } 5338 5339 /* request PM ops to EH */ 5340 spin_lock_irqsave(ap->lock, flags); 5341 5342 ap->pm_mesg = mesg; 5343 ap->pflags |= ATA_PFLAG_PM_PENDING; 5344 ata_for_each_link(link, ap, HOST_FIRST) { 5345 link->eh_info.action |= action; 5346 link->eh_info.flags |= ehi_flags; 5347 } 5348 5349 ata_port_schedule_eh(ap); 5350 5351 spin_unlock_irqrestore(ap->lock, flags); 5352 5353 if (!async) { 5354 ata_port_wait_eh(ap); 5355 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); 5356 } 5357 } 5358 5359 /* 5360 * On some hardware, device fails to respond after spun down for suspend. As 5361 * the device won't be used before being resumed, we don't need to touch the 5362 * device. Ask EH to skip the usual stuff and proceed directly to suspend. 5363 * 5364 * http://thread.gmane.org/gmane.linux.ide/46764 5365 */ 5366 static const unsigned int ata_port_suspend_ehi = ATA_EHI_QUIET 5367 | ATA_EHI_NO_AUTOPSY 5368 | ATA_EHI_NO_RECOVERY; 5369 5370 static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg) 5371 { 5372 ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, false); 5373 } 5374 5375 static void ata_port_suspend_async(struct ata_port *ap, pm_message_t mesg) 5376 { 5377 ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, true); 5378 } 5379 5380 static int ata_port_pm_suspend(struct device *dev) 5381 { 5382 struct ata_port *ap = to_ata_port(dev); 5383 5384 if (pm_runtime_suspended(dev)) 5385 return 0; 5386 5387 ata_port_suspend(ap, PMSG_SUSPEND); 5388 return 0; 5389 } 5390 5391 static int ata_port_pm_freeze(struct device *dev) 5392 { 5393 struct ata_port *ap = to_ata_port(dev); 5394 5395 if (pm_runtime_suspended(dev)) 5396 return 0; 5397 5398 ata_port_suspend(ap, PMSG_FREEZE); 5399 return 0; 5400 } 5401 5402 static int ata_port_pm_poweroff(struct device *dev) 5403 { 5404 ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE); 5405 return 0; 5406 } 5407 5408 static const unsigned int ata_port_resume_ehi = ATA_EHI_NO_AUTOPSY 5409 | ATA_EHI_QUIET; 5410 5411 static void ata_port_resume(struct ata_port *ap, pm_message_t mesg) 5412 { 5413 ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, false); 5414 } 5415 5416 static void ata_port_resume_async(struct ata_port *ap, pm_message_t mesg) 5417 { 5418 ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, true); 5419 } 5420 5421 static int ata_port_pm_resume(struct device *dev) 5422 { 5423 ata_port_resume_async(to_ata_port(dev), PMSG_RESUME); 5424 pm_runtime_disable(dev); 5425 pm_runtime_set_active(dev); 5426 pm_runtime_enable(dev); 5427 return 0; 5428 } 5429 5430 /* 5431 * For ODDs, the upper layer will poll for media change every few seconds, 5432 * which will make it enter and leave suspend state every few seconds. And 5433 * as each suspend will cause a hard/soft reset, the gain of runtime suspend 5434 * is very little and the ODD may malfunction after constantly being reset. 5435 * So the idle callback here will not proceed to suspend if a non-ZPODD capable 5436 * ODD is attached to the port. 5437 */ 5438 static int ata_port_runtime_idle(struct device *dev) 5439 { 5440 struct ata_port *ap = to_ata_port(dev); 5441 struct ata_link *link; 5442 struct ata_device *adev; 5443 5444 ata_for_each_link(link, ap, HOST_FIRST) { 5445 ata_for_each_dev(adev, link, ENABLED) 5446 if (adev->class == ATA_DEV_ATAPI && 5447 !zpodd_dev_enabled(adev)) 5448 return -EBUSY; 5449 } 5450 5451 return 0; 5452 } 5453 5454 static int ata_port_runtime_suspend(struct device *dev) 5455 { 5456 ata_port_suspend(to_ata_port(dev), PMSG_AUTO_SUSPEND); 5457 return 0; 5458 } 5459 5460 static int ata_port_runtime_resume(struct device *dev) 5461 { 5462 ata_port_resume(to_ata_port(dev), PMSG_AUTO_RESUME); 5463 return 0; 5464 } 5465 5466 static const struct dev_pm_ops ata_port_pm_ops = { 5467 .suspend = ata_port_pm_suspend, 5468 .resume = ata_port_pm_resume, 5469 .freeze = ata_port_pm_freeze, 5470 .thaw = ata_port_pm_resume, 5471 .poweroff = ata_port_pm_poweroff, 5472 .restore = ata_port_pm_resume, 5473 5474 .runtime_suspend = ata_port_runtime_suspend, 5475 .runtime_resume = ata_port_runtime_resume, 5476 .runtime_idle = ata_port_runtime_idle, 5477 }; 5478 5479 /* sas ports don't participate in pm runtime management of ata_ports, 5480 * and need to resume ata devices at the domain level, not the per-port 5481 * level. sas suspend/resume is async to allow parallel port recovery 5482 * since sas has multiple ata_port instances per Scsi_Host. 5483 */ 5484 void ata_sas_port_suspend(struct ata_port *ap) 5485 { 5486 ata_port_suspend_async(ap, PMSG_SUSPEND); 5487 } 5488 EXPORT_SYMBOL_GPL(ata_sas_port_suspend); 5489 5490 void ata_sas_port_resume(struct ata_port *ap) 5491 { 5492 ata_port_resume_async(ap, PMSG_RESUME); 5493 } 5494 EXPORT_SYMBOL_GPL(ata_sas_port_resume); 5495 5496 /** 5497 * ata_host_suspend - suspend host 5498 * @host: host to suspend 5499 * @mesg: PM message 5500 * 5501 * Suspend @host. Actual operation is performed by port suspend. 5502 */ 5503 int ata_host_suspend(struct ata_host *host, pm_message_t mesg) 5504 { 5505 host->dev->power.power_state = mesg; 5506 return 0; 5507 } 5508 5509 /** 5510 * ata_host_resume - resume host 5511 * @host: host to resume 5512 * 5513 * Resume @host. Actual operation is performed by port resume. 5514 */ 5515 void ata_host_resume(struct ata_host *host) 5516 { 5517 host->dev->power.power_state = PMSG_ON; 5518 } 5519 #endif 5520 5521 struct device_type ata_port_type = { 5522 .name = "ata_port", 5523 #ifdef CONFIG_PM 5524 .pm = &ata_port_pm_ops, 5525 #endif 5526 }; 5527 5528 /** 5529 * ata_dev_init - Initialize an ata_device structure 5530 * @dev: Device structure to initialize 5531 * 5532 * Initialize @dev in preparation for probing. 5533 * 5534 * LOCKING: 5535 * Inherited from caller. 5536 */ 5537 void ata_dev_init(struct ata_device *dev) 5538 { 5539 struct ata_link *link = ata_dev_phys_link(dev); 5540 struct ata_port *ap = link->ap; 5541 unsigned long flags; 5542 5543 /* SATA spd limit is bound to the attached device, reset together */ 5544 link->sata_spd_limit = link->hw_sata_spd_limit; 5545 link->sata_spd = 0; 5546 5547 /* High bits of dev->flags are used to record warm plug 5548 * requests which occur asynchronously. Synchronize using 5549 * host lock. 5550 */ 5551 spin_lock_irqsave(ap->lock, flags); 5552 dev->flags &= ~ATA_DFLAG_INIT_MASK; 5553 dev->horkage = 0; 5554 spin_unlock_irqrestore(ap->lock, flags); 5555 5556 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0, 5557 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN); 5558 dev->pio_mask = UINT_MAX; 5559 dev->mwdma_mask = UINT_MAX; 5560 dev->udma_mask = UINT_MAX; 5561 } 5562 5563 /** 5564 * ata_link_init - Initialize an ata_link structure 5565 * @ap: ATA port link is attached to 5566 * @link: Link structure to initialize 5567 * @pmp: Port multiplier port number 5568 * 5569 * Initialize @link. 5570 * 5571 * LOCKING: 5572 * Kernel thread context (may sleep) 5573 */ 5574 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) 5575 { 5576 int i; 5577 5578 /* clear everything except for devices */ 5579 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0, 5580 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN); 5581 5582 link->ap = ap; 5583 link->pmp = pmp; 5584 link->active_tag = ATA_TAG_POISON; 5585 link->hw_sata_spd_limit = UINT_MAX; 5586 5587 /* can't use iterator, ap isn't initialized yet */ 5588 for (i = 0; i < ATA_MAX_DEVICES; i++) { 5589 struct ata_device *dev = &link->device[i]; 5590 5591 dev->link = link; 5592 dev->devno = dev - link->device; 5593 #ifdef CONFIG_ATA_ACPI 5594 dev->gtf_filter = ata_acpi_gtf_filter; 5595 #endif 5596 ata_dev_init(dev); 5597 } 5598 } 5599 5600 /** 5601 * sata_link_init_spd - Initialize link->sata_spd_limit 5602 * @link: Link to configure sata_spd_limit for 5603 * 5604 * Initialize @link->[hw_]sata_spd_limit to the currently 5605 * configured value. 5606 * 5607 * LOCKING: 5608 * Kernel thread context (may sleep). 5609 * 5610 * RETURNS: 5611 * 0 on success, -errno on failure. 5612 */ 5613 int sata_link_init_spd(struct ata_link *link) 5614 { 5615 u8 spd; 5616 int rc; 5617 5618 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol); 5619 if (rc) 5620 return rc; 5621 5622 spd = (link->saved_scontrol >> 4) & 0xf; 5623 if (spd) 5624 link->hw_sata_spd_limit &= (1 << spd) - 1; 5625 5626 ata_force_link_limits(link); 5627 5628 link->sata_spd_limit = link->hw_sata_spd_limit; 5629 5630 return 0; 5631 } 5632 5633 /** 5634 * ata_port_alloc - allocate and initialize basic ATA port resources 5635 * @host: ATA host this allocated port belongs to 5636 * 5637 * Allocate and initialize basic ATA port resources. 5638 * 5639 * RETURNS: 5640 * Allocate ATA port on success, NULL on failure. 5641 * 5642 * LOCKING: 5643 * Inherited from calling layer (may sleep). 5644 */ 5645 struct ata_port *ata_port_alloc(struct ata_host *host) 5646 { 5647 struct ata_port *ap; 5648 5649 DPRINTK("ENTER\n"); 5650 5651 ap = kzalloc(sizeof(*ap), GFP_KERNEL); 5652 if (!ap) 5653 return NULL; 5654 5655 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN; 5656 ap->lock = &host->lock; 5657 ap->print_id = -1; 5658 ap->local_port_no = -1; 5659 ap->host = host; 5660 ap->dev = host->dev; 5661 5662 #if defined(ATA_VERBOSE_DEBUG) 5663 /* turn on all debugging levels */ 5664 ap->msg_enable = 0x00FF; 5665 #elif defined(ATA_DEBUG) 5666 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; 5667 #else 5668 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; 5669 #endif 5670 5671 mutex_init(&ap->scsi_scan_mutex); 5672 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); 5673 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); 5674 INIT_LIST_HEAD(&ap->eh_done_q); 5675 init_waitqueue_head(&ap->eh_wait_q); 5676 init_completion(&ap->park_req_pending); 5677 init_timer_deferrable(&ap->fastdrain_timer); 5678 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; 5679 ap->fastdrain_timer.data = (unsigned long)ap; 5680 5681 ap->cbl = ATA_CBL_NONE; 5682 5683 ata_link_init(ap, &ap->link, 0); 5684 5685 #ifdef ATA_IRQ_TRAP 5686 ap->stats.unhandled_irq = 1; 5687 ap->stats.idle_irq = 1; 5688 #endif 5689 ata_sff_port_init(ap); 5690 5691 return ap; 5692 } 5693 5694 static void ata_host_release(struct device *gendev, void *res) 5695 { 5696 struct ata_host *host = dev_get_drvdata(gendev); 5697 int i; 5698 5699 for (i = 0; i < host->n_ports; i++) { 5700 struct ata_port *ap = host->ports[i]; 5701 5702 if (!ap) 5703 continue; 5704 5705 if (ap->scsi_host) 5706 scsi_host_put(ap->scsi_host); 5707 5708 kfree(ap->pmp_link); 5709 kfree(ap->slave_link); 5710 kfree(ap); 5711 host->ports[i] = NULL; 5712 } 5713 5714 dev_set_drvdata(gendev, NULL); 5715 } 5716 5717 /** 5718 * ata_host_alloc - allocate and init basic ATA host resources 5719 * @dev: generic device this host is associated with 5720 * @max_ports: maximum number of ATA ports associated with this host 5721 * 5722 * Allocate and initialize basic ATA host resources. LLD calls 5723 * this function to allocate a host, initializes it fully and 5724 * attaches it using ata_host_register(). 5725 * 5726 * @max_ports ports are allocated and host->n_ports is 5727 * initialized to @max_ports. The caller is allowed to decrease 5728 * host->n_ports before calling ata_host_register(). The unused 5729 * ports will be automatically freed on registration. 5730 * 5731 * RETURNS: 5732 * Allocate ATA host on success, NULL on failure. 5733 * 5734 * LOCKING: 5735 * Inherited from calling layer (may sleep). 5736 */ 5737 struct ata_host *ata_host_alloc(struct device *dev, int max_ports) 5738 { 5739 struct ata_host *host; 5740 size_t sz; 5741 int i; 5742 5743 DPRINTK("ENTER\n"); 5744 5745 if (!devres_open_group(dev, NULL, GFP_KERNEL)) 5746 return NULL; 5747 5748 /* alloc a container for our list of ATA ports (buses) */ 5749 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); 5750 /* alloc a container for our list of ATA ports (buses) */ 5751 host = devres_alloc(ata_host_release, sz, GFP_KERNEL); 5752 if (!host) 5753 goto err_out; 5754 5755 devres_add(dev, host); 5756 dev_set_drvdata(dev, host); 5757 5758 spin_lock_init(&host->lock); 5759 mutex_init(&host->eh_mutex); 5760 host->dev = dev; 5761 host->n_ports = max_ports; 5762 5763 /* allocate ports bound to this host */ 5764 for (i = 0; i < max_ports; i++) { 5765 struct ata_port *ap; 5766 5767 ap = ata_port_alloc(host); 5768 if (!ap) 5769 goto err_out; 5770 5771 ap->port_no = i; 5772 host->ports[i] = ap; 5773 } 5774 5775 devres_remove_group(dev, NULL); 5776 return host; 5777 5778 err_out: 5779 devres_release_group(dev, NULL); 5780 return NULL; 5781 } 5782 5783 /** 5784 * ata_host_alloc_pinfo - alloc host and init with port_info array 5785 * @dev: generic device this host is associated with 5786 * @ppi: array of ATA port_info to initialize host with 5787 * @n_ports: number of ATA ports attached to this host 5788 * 5789 * Allocate ATA host and initialize with info from @ppi. If NULL 5790 * terminated, @ppi may contain fewer entries than @n_ports. The 5791 * last entry will be used for the remaining ports. 5792 * 5793 * RETURNS: 5794 * Allocate ATA host on success, NULL on failure. 5795 * 5796 * LOCKING: 5797 * Inherited from calling layer (may sleep). 5798 */ 5799 struct ata_host *ata_host_alloc_pinfo(struct device *dev, 5800 const struct ata_port_info * const * ppi, 5801 int n_ports) 5802 { 5803 const struct ata_port_info *pi; 5804 struct ata_host *host; 5805 int i, j; 5806 5807 host = ata_host_alloc(dev, n_ports); 5808 if (!host) 5809 return NULL; 5810 5811 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { 5812 struct ata_port *ap = host->ports[i]; 5813 5814 if (ppi[j]) 5815 pi = ppi[j++]; 5816 5817 ap->pio_mask = pi->pio_mask; 5818 ap->mwdma_mask = pi->mwdma_mask; 5819 ap->udma_mask = pi->udma_mask; 5820 ap->flags |= pi->flags; 5821 ap->link.flags |= pi->link_flags; 5822 ap->ops = pi->port_ops; 5823 5824 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) 5825 host->ops = pi->port_ops; 5826 } 5827 5828 return host; 5829 } 5830 5831 /** 5832 * ata_slave_link_init - initialize slave link 5833 * @ap: port to initialize slave link for 5834 * 5835 * Create and initialize slave link for @ap. This enables slave 5836 * link handling on the port. 5837 * 5838 * In libata, a port contains links and a link contains devices. 5839 * There is single host link but if a PMP is attached to it, 5840 * there can be multiple fan-out links. On SATA, there's usually 5841 * a single device connected to a link but PATA and SATA 5842 * controllers emulating TF based interface can have two - master 5843 * and slave. 5844 * 5845 * However, there are a few controllers which don't fit into this 5846 * abstraction too well - SATA controllers which emulate TF 5847 * interface with both master and slave devices but also have 5848 * separate SCR register sets for each device. These controllers 5849 * need separate links for physical link handling 5850 * (e.g. onlineness, link speed) but should be treated like a 5851 * traditional M/S controller for everything else (e.g. command 5852 * issue, softreset). 5853 * 5854 * slave_link is libata's way of handling this class of 5855 * controllers without impacting core layer too much. For 5856 * anything other than physical link handling, the default host 5857 * link is used for both master and slave. For physical link 5858 * handling, separate @ap->slave_link is used. All dirty details 5859 * are implemented inside libata core layer. From LLD's POV, the 5860 * only difference is that prereset, hardreset and postreset are 5861 * called once more for the slave link, so the reset sequence 5862 * looks like the following. 5863 * 5864 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) -> 5865 * softreset(M) -> postreset(M) -> postreset(S) 5866 * 5867 * Note that softreset is called only for the master. Softreset 5868 * resets both M/S by definition, so SRST on master should handle 5869 * both (the standard method will work just fine). 5870 * 5871 * LOCKING: 5872 * Should be called before host is registered. 5873 * 5874 * RETURNS: 5875 * 0 on success, -errno on failure. 5876 */ 5877 int ata_slave_link_init(struct ata_port *ap) 5878 { 5879 struct ata_link *link; 5880 5881 WARN_ON(ap->slave_link); 5882 WARN_ON(ap->flags & ATA_FLAG_PMP); 5883 5884 link = kzalloc(sizeof(*link), GFP_KERNEL); 5885 if (!link) 5886 return -ENOMEM; 5887 5888 ata_link_init(ap, link, 1); 5889 ap->slave_link = link; 5890 return 0; 5891 } 5892 5893 static void ata_host_stop(struct device *gendev, void *res) 5894 { 5895 struct ata_host *host = dev_get_drvdata(gendev); 5896 int i; 5897 5898 WARN_ON(!(host->flags & ATA_HOST_STARTED)); 5899 5900 for (i = 0; i < host->n_ports; i++) { 5901 struct ata_port *ap = host->ports[i]; 5902 5903 if (ap->ops->port_stop) 5904 ap->ops->port_stop(ap); 5905 } 5906 5907 if (host->ops->host_stop) 5908 host->ops->host_stop(host); 5909 } 5910 5911 /** 5912 * ata_finalize_port_ops - finalize ata_port_operations 5913 * @ops: ata_port_operations to finalize 5914 * 5915 * An ata_port_operations can inherit from another ops and that 5916 * ops can again inherit from another. This can go on as many 5917 * times as necessary as long as there is no loop in the 5918 * inheritance chain. 5919 * 5920 * Ops tables are finalized when the host is started. NULL or 5921 * unspecified entries are inherited from the closet ancestor 5922 * which has the method and the entry is populated with it. 5923 * After finalization, the ops table directly points to all the 5924 * methods and ->inherits is no longer necessary and cleared. 5925 * 5926 * Using ATA_OP_NULL, inheriting ops can force a method to NULL. 5927 * 5928 * LOCKING: 5929 * None. 5930 */ 5931 static void ata_finalize_port_ops(struct ata_port_operations *ops) 5932 { 5933 static DEFINE_SPINLOCK(lock); 5934 const struct ata_port_operations *cur; 5935 void **begin = (void **)ops; 5936 void **end = (void **)&ops->inherits; 5937 void **pp; 5938 5939 if (!ops || !ops->inherits) 5940 return; 5941 5942 spin_lock(&lock); 5943 5944 for (cur = ops->inherits; cur; cur = cur->inherits) { 5945 void **inherit = (void **)cur; 5946 5947 for (pp = begin; pp < end; pp++, inherit++) 5948 if (!*pp) 5949 *pp = *inherit; 5950 } 5951 5952 for (pp = begin; pp < end; pp++) 5953 if (IS_ERR(*pp)) 5954 *pp = NULL; 5955 5956 ops->inherits = NULL; 5957 5958 spin_unlock(&lock); 5959 } 5960 5961 /** 5962 * ata_host_start - start and freeze ports of an ATA host 5963 * @host: ATA host to start ports for 5964 * 5965 * Start and then freeze ports of @host. Started status is 5966 * recorded in host->flags, so this function can be called 5967 * multiple times. Ports are guaranteed to get started only 5968 * once. If host->ops isn't initialized yet, its set to the 5969 * first non-dummy port ops. 5970 * 5971 * LOCKING: 5972 * Inherited from calling layer (may sleep). 5973 * 5974 * RETURNS: 5975 * 0 if all ports are started successfully, -errno otherwise. 5976 */ 5977 int ata_host_start(struct ata_host *host) 5978 { 5979 int have_stop = 0; 5980 void *start_dr = NULL; 5981 int i, rc; 5982 5983 if (host->flags & ATA_HOST_STARTED) 5984 return 0; 5985 5986 ata_finalize_port_ops(host->ops); 5987 5988 for (i = 0; i < host->n_ports; i++) { 5989 struct ata_port *ap = host->ports[i]; 5990 5991 ata_finalize_port_ops(ap->ops); 5992 5993 if (!host->ops && !ata_port_is_dummy(ap)) 5994 host->ops = ap->ops; 5995 5996 if (ap->ops->port_stop) 5997 have_stop = 1; 5998 } 5999 6000 if (host->ops->host_stop) 6001 have_stop = 1; 6002 6003 if (have_stop) { 6004 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL); 6005 if (!start_dr) 6006 return -ENOMEM; 6007 } 6008 6009 for (i = 0; i < host->n_ports; i++) { 6010 struct ata_port *ap = host->ports[i]; 6011 6012 if (ap->ops->port_start) { 6013 rc = ap->ops->port_start(ap); 6014 if (rc) { 6015 if (rc != -ENODEV) 6016 dev_err(host->dev, 6017 "failed to start port %d (errno=%d)\n", 6018 i, rc); 6019 goto err_out; 6020 } 6021 } 6022 ata_eh_freeze_port(ap); 6023 } 6024 6025 if (start_dr) 6026 devres_add(host->dev, start_dr); 6027 host->flags |= ATA_HOST_STARTED; 6028 return 0; 6029 6030 err_out: 6031 while (--i >= 0) { 6032 struct ata_port *ap = host->ports[i]; 6033 6034 if (ap->ops->port_stop) 6035 ap->ops->port_stop(ap); 6036 } 6037 devres_free(start_dr); 6038 return rc; 6039 } 6040 6041 /** 6042 * ata_sas_host_init - Initialize a host struct for sas (ipr, libsas) 6043 * @host: host to initialize 6044 * @dev: device host is attached to 6045 * @ops: port_ops 6046 * 6047 */ 6048 void ata_host_init(struct ata_host *host, struct device *dev, 6049 struct ata_port_operations *ops) 6050 { 6051 spin_lock_init(&host->lock); 6052 mutex_init(&host->eh_mutex); 6053 host->n_tags = ATA_MAX_QUEUE - 1; 6054 host->dev = dev; 6055 host->ops = ops; 6056 } 6057 6058 void __ata_port_probe(struct ata_port *ap) 6059 { 6060 struct ata_eh_info *ehi = &ap->link.eh_info; 6061 unsigned long flags; 6062 6063 /* kick EH for boot probing */ 6064 spin_lock_irqsave(ap->lock, flags); 6065 6066 ehi->probe_mask |= ATA_ALL_DEVICES; 6067 ehi->action |= ATA_EH_RESET; 6068 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; 6069 6070 ap->pflags &= ~ATA_PFLAG_INITIALIZING; 6071 ap->pflags |= ATA_PFLAG_LOADING; 6072 ata_port_schedule_eh(ap); 6073 6074 spin_unlock_irqrestore(ap->lock, flags); 6075 } 6076 6077 int ata_port_probe(struct ata_port *ap) 6078 { 6079 int rc = 0; 6080 6081 if (ap->ops->error_handler) { 6082 __ata_port_probe(ap); 6083 ata_port_wait_eh(ap); 6084 } else { 6085 DPRINTK("ata%u: bus probe begin\n", ap->print_id); 6086 rc = ata_bus_probe(ap); 6087 DPRINTK("ata%u: bus probe end\n", ap->print_id); 6088 } 6089 return rc; 6090 } 6091 6092 6093 static void async_port_probe(void *data, async_cookie_t cookie) 6094 { 6095 struct ata_port *ap = data; 6096 6097 /* 6098 * If we're not allowed to scan this host in parallel, 6099 * we need to wait until all previous scans have completed 6100 * before going further. 6101 * Jeff Garzik says this is only within a controller, so we 6102 * don't need to wait for port 0, only for later ports. 6103 */ 6104 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0) 6105 async_synchronize_cookie(cookie); 6106 6107 (void)ata_port_probe(ap); 6108 6109 /* in order to keep device order, we need to synchronize at this point */ 6110 async_synchronize_cookie(cookie); 6111 6112 ata_scsi_scan_host(ap, 1); 6113 } 6114 6115 /** 6116 * ata_host_register - register initialized ATA host 6117 * @host: ATA host to register 6118 * @sht: template for SCSI host 6119 * 6120 * Register initialized ATA host. @host is allocated using 6121 * ata_host_alloc() and fully initialized by LLD. This function 6122 * starts ports, registers @host with ATA and SCSI layers and 6123 * probe registered devices. 6124 * 6125 * LOCKING: 6126 * Inherited from calling layer (may sleep). 6127 * 6128 * RETURNS: 6129 * 0 on success, -errno otherwise. 6130 */ 6131 int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) 6132 { 6133 int i, rc; 6134 6135 host->n_tags = clamp(sht->can_queue, 1, ATA_MAX_QUEUE - 1); 6136 6137 /* host must have been started */ 6138 if (!(host->flags & ATA_HOST_STARTED)) { 6139 dev_err(host->dev, "BUG: trying to register unstarted host\n"); 6140 WARN_ON(1); 6141 return -EINVAL; 6142 } 6143 6144 /* Blow away unused ports. This happens when LLD can't 6145 * determine the exact number of ports to allocate at 6146 * allocation time. 6147 */ 6148 for (i = host->n_ports; host->ports[i]; i++) 6149 kfree(host->ports[i]); 6150 6151 /* give ports names and add SCSI hosts */ 6152 for (i = 0; i < host->n_ports; i++) { 6153 host->ports[i]->print_id = atomic_inc_return(&ata_print_id); 6154 host->ports[i]->local_port_no = i + 1; 6155 } 6156 6157 /* Create associated sysfs transport objects */ 6158 for (i = 0; i < host->n_ports; i++) { 6159 rc = ata_tport_add(host->dev,host->ports[i]); 6160 if (rc) { 6161 goto err_tadd; 6162 } 6163 } 6164 6165 rc = ata_scsi_add_hosts(host, sht); 6166 if (rc) 6167 goto err_tadd; 6168 6169 /* set cable, sata_spd_limit and report */ 6170 for (i = 0; i < host->n_ports; i++) { 6171 struct ata_port *ap = host->ports[i]; 6172 unsigned long xfer_mask; 6173 6174 /* set SATA cable type if still unset */ 6175 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) 6176 ap->cbl = ATA_CBL_SATA; 6177 6178 /* init sata_spd_limit to the current value */ 6179 sata_link_init_spd(&ap->link); 6180 if (ap->slave_link) 6181 sata_link_init_spd(ap->slave_link); 6182 6183 /* print per-port info to dmesg */ 6184 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, 6185 ap->udma_mask); 6186 6187 if (!ata_port_is_dummy(ap)) { 6188 ata_port_info(ap, "%cATA max %s %s\n", 6189 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', 6190 ata_mode_string(xfer_mask), 6191 ap->link.eh_info.desc); 6192 ata_ehi_clear_desc(&ap->link.eh_info); 6193 } else 6194 ata_port_info(ap, "DUMMY\n"); 6195 } 6196 6197 /* perform each probe asynchronously */ 6198 for (i = 0; i < host->n_ports; i++) { 6199 struct ata_port *ap = host->ports[i]; 6200 async_schedule(async_port_probe, ap); 6201 } 6202 6203 return 0; 6204 6205 err_tadd: 6206 while (--i >= 0) { 6207 ata_tport_delete(host->ports[i]); 6208 } 6209 return rc; 6210 6211 } 6212 6213 /** 6214 * ata_host_activate - start host, request IRQ and register it 6215 * @host: target ATA host 6216 * @irq: IRQ to request 6217 * @irq_handler: irq_handler used when requesting IRQ 6218 * @irq_flags: irq_flags used when requesting IRQ 6219 * @sht: scsi_host_template to use when registering the host 6220 * 6221 * After allocating an ATA host and initializing it, most libata 6222 * LLDs perform three steps to activate the host - start host, 6223 * request IRQ and register it. This helper takes necessasry 6224 * arguments and performs the three steps in one go. 6225 * 6226 * An invalid IRQ skips the IRQ registration and expects the host to 6227 * have set polling mode on the port. In this case, @irq_handler 6228 * should be NULL. 6229 * 6230 * LOCKING: 6231 * Inherited from calling layer (may sleep). 6232 * 6233 * RETURNS: 6234 * 0 on success, -errno otherwise. 6235 */ 6236 int ata_host_activate(struct ata_host *host, int irq, 6237 irq_handler_t irq_handler, unsigned long irq_flags, 6238 struct scsi_host_template *sht) 6239 { 6240 int i, rc; 6241 6242 rc = ata_host_start(host); 6243 if (rc) 6244 return rc; 6245 6246 /* Special case for polling mode */ 6247 if (!irq) { 6248 WARN_ON(irq_handler); 6249 return ata_host_register(host, sht); 6250 } 6251 6252 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, 6253 dev_name(host->dev), host); 6254 if (rc) 6255 return rc; 6256 6257 for (i = 0; i < host->n_ports; i++) 6258 ata_port_desc(host->ports[i], "irq %d", irq); 6259 6260 rc = ata_host_register(host, sht); 6261 /* if failed, just free the IRQ and leave ports alone */ 6262 if (rc) 6263 devm_free_irq(host->dev, irq, host); 6264 6265 return rc; 6266 } 6267 6268 /** 6269 * ata_port_detach - Detach ATA port in prepration of device removal 6270 * @ap: ATA port to be detached 6271 * 6272 * Detach all ATA devices and the associated SCSI devices of @ap; 6273 * then, remove the associated SCSI host. @ap is guaranteed to 6274 * be quiescent on return from this function. 6275 * 6276 * LOCKING: 6277 * Kernel thread context (may sleep). 6278 */ 6279 static void ata_port_detach(struct ata_port *ap) 6280 { 6281 unsigned long flags; 6282 struct ata_link *link; 6283 struct ata_device *dev; 6284 6285 if (!ap->ops->error_handler) 6286 goto skip_eh; 6287 6288 /* tell EH we're leaving & flush EH */ 6289 spin_lock_irqsave(ap->lock, flags); 6290 ap->pflags |= ATA_PFLAG_UNLOADING; 6291 ata_port_schedule_eh(ap); 6292 spin_unlock_irqrestore(ap->lock, flags); 6293 6294 /* wait till EH commits suicide */ 6295 ata_port_wait_eh(ap); 6296 6297 /* it better be dead now */ 6298 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED)); 6299 6300 cancel_delayed_work_sync(&ap->hotplug_task); 6301 6302 skip_eh: 6303 /* clean up zpodd on port removal */ 6304 ata_for_each_link(link, ap, HOST_FIRST) { 6305 ata_for_each_dev(dev, link, ALL) { 6306 if (zpodd_dev_enabled(dev)) 6307 zpodd_exit(dev); 6308 } 6309 } 6310 if (ap->pmp_link) { 6311 int i; 6312 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 6313 ata_tlink_delete(&ap->pmp_link[i]); 6314 } 6315 /* remove the associated SCSI host */ 6316 scsi_remove_host(ap->scsi_host); 6317 ata_tport_delete(ap); 6318 } 6319 6320 /** 6321 * ata_host_detach - Detach all ports of an ATA host 6322 * @host: Host to detach 6323 * 6324 * Detach all ports of @host. 6325 * 6326 * LOCKING: 6327 * Kernel thread context (may sleep). 6328 */ 6329 void ata_host_detach(struct ata_host *host) 6330 { 6331 int i; 6332 6333 for (i = 0; i < host->n_ports; i++) 6334 ata_port_detach(host->ports[i]); 6335 6336 /* the host is dead now, dissociate ACPI */ 6337 ata_acpi_dissociate(host); 6338 } 6339 6340 #ifdef CONFIG_PCI 6341 6342 /** 6343 * ata_pci_remove_one - PCI layer callback for device removal 6344 * @pdev: PCI device that was removed 6345 * 6346 * PCI layer indicates to libata via this hook that hot-unplug or 6347 * module unload event has occurred. Detach all ports. Resource 6348 * release is handled via devres. 6349 * 6350 * LOCKING: 6351 * Inherited from PCI layer (may sleep). 6352 */ 6353 void ata_pci_remove_one(struct pci_dev *pdev) 6354 { 6355 struct ata_host *host = pci_get_drvdata(pdev); 6356 6357 ata_host_detach(host); 6358 } 6359 6360 /* move to PCI subsystem */ 6361 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) 6362 { 6363 unsigned long tmp = 0; 6364 6365 switch (bits->width) { 6366 case 1: { 6367 u8 tmp8 = 0; 6368 pci_read_config_byte(pdev, bits->reg, &tmp8); 6369 tmp = tmp8; 6370 break; 6371 } 6372 case 2: { 6373 u16 tmp16 = 0; 6374 pci_read_config_word(pdev, bits->reg, &tmp16); 6375 tmp = tmp16; 6376 break; 6377 } 6378 case 4: { 6379 u32 tmp32 = 0; 6380 pci_read_config_dword(pdev, bits->reg, &tmp32); 6381 tmp = tmp32; 6382 break; 6383 } 6384 6385 default: 6386 return -EINVAL; 6387 } 6388 6389 tmp &= bits->mask; 6390 6391 return (tmp == bits->val) ? 1 : 0; 6392 } 6393 6394 #ifdef CONFIG_PM 6395 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) 6396 { 6397 pci_save_state(pdev); 6398 pci_disable_device(pdev); 6399 6400 if (mesg.event & PM_EVENT_SLEEP) 6401 pci_set_power_state(pdev, PCI_D3hot); 6402 } 6403 6404 int ata_pci_device_do_resume(struct pci_dev *pdev) 6405 { 6406 int rc; 6407 6408 pci_set_power_state(pdev, PCI_D0); 6409 pci_restore_state(pdev); 6410 6411 rc = pcim_enable_device(pdev); 6412 if (rc) { 6413 dev_err(&pdev->dev, 6414 "failed to enable device after resume (%d)\n", rc); 6415 return rc; 6416 } 6417 6418 pci_set_master(pdev); 6419 return 0; 6420 } 6421 6422 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) 6423 { 6424 struct ata_host *host = pci_get_drvdata(pdev); 6425 int rc = 0; 6426 6427 rc = ata_host_suspend(host, mesg); 6428 if (rc) 6429 return rc; 6430 6431 ata_pci_device_do_suspend(pdev, mesg); 6432 6433 return 0; 6434 } 6435 6436 int ata_pci_device_resume(struct pci_dev *pdev) 6437 { 6438 struct ata_host *host = pci_get_drvdata(pdev); 6439 int rc; 6440 6441 rc = ata_pci_device_do_resume(pdev); 6442 if (rc == 0) 6443 ata_host_resume(host); 6444 return rc; 6445 } 6446 #endif /* CONFIG_PM */ 6447 6448 #endif /* CONFIG_PCI */ 6449 6450 /** 6451 * ata_platform_remove_one - Platform layer callback for device removal 6452 * @pdev: Platform device that was removed 6453 * 6454 * Platform layer indicates to libata via this hook that hot-unplug or 6455 * module unload event has occurred. Detach all ports. Resource 6456 * release is handled via devres. 6457 * 6458 * LOCKING: 6459 * Inherited from platform layer (may sleep). 6460 */ 6461 int ata_platform_remove_one(struct platform_device *pdev) 6462 { 6463 struct ata_host *host = platform_get_drvdata(pdev); 6464 6465 ata_host_detach(host); 6466 6467 return 0; 6468 } 6469 6470 static int __init ata_parse_force_one(char **cur, 6471 struct ata_force_ent *force_ent, 6472 const char **reason) 6473 { 6474 static const struct ata_force_param force_tbl[] __initconst = { 6475 { "40c", .cbl = ATA_CBL_PATA40 }, 6476 { "80c", .cbl = ATA_CBL_PATA80 }, 6477 { "short40c", .cbl = ATA_CBL_PATA40_SHORT }, 6478 { "unk", .cbl = ATA_CBL_PATA_UNK }, 6479 { "ign", .cbl = ATA_CBL_PATA_IGN }, 6480 { "sata", .cbl = ATA_CBL_SATA }, 6481 { "1.5Gbps", .spd_limit = 1 }, 6482 { "3.0Gbps", .spd_limit = 2 }, 6483 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ }, 6484 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ }, 6485 { "noncqtrim", .horkage_on = ATA_HORKAGE_NO_NCQ_TRIM }, 6486 { "ncqtrim", .horkage_off = ATA_HORKAGE_NO_NCQ_TRIM }, 6487 { "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID }, 6488 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) }, 6489 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) }, 6490 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) }, 6491 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) }, 6492 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) }, 6493 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) }, 6494 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) }, 6495 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) }, 6496 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) }, 6497 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) }, 6498 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) }, 6499 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) }, 6500 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, 6501 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, 6502 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, 6503 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, 6504 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, 6505 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, 6506 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, 6507 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, 6508 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, 6509 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, 6510 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, 6511 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, 6512 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, 6513 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, 6514 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, 6515 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, 6516 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, 6517 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, 6518 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, 6519 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, 6520 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, 6521 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) }, 6522 { "nohrst", .lflags = ATA_LFLAG_NO_HRST }, 6523 { "nosrst", .lflags = ATA_LFLAG_NO_SRST }, 6524 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST }, 6525 { "rstonce", .lflags = ATA_LFLAG_RST_ONCE }, 6526 { "atapi_dmadir", .horkage_on = ATA_HORKAGE_ATAPI_DMADIR }, 6527 { "disable", .horkage_on = ATA_HORKAGE_DISABLE }, 6528 }; 6529 char *start = *cur, *p = *cur; 6530 char *id, *val, *endp; 6531 const struct ata_force_param *match_fp = NULL; 6532 int nr_matches = 0, i; 6533 6534 /* find where this param ends and update *cur */ 6535 while (*p != '\0' && *p != ',') 6536 p++; 6537 6538 if (*p == '\0') 6539 *cur = p; 6540 else 6541 *cur = p + 1; 6542 6543 *p = '\0'; 6544 6545 /* parse */ 6546 p = strchr(start, ':'); 6547 if (!p) { 6548 val = strstrip(start); 6549 goto parse_val; 6550 } 6551 *p = '\0'; 6552 6553 id = strstrip(start); 6554 val = strstrip(p + 1); 6555 6556 /* parse id */ 6557 p = strchr(id, '.'); 6558 if (p) { 6559 *p++ = '\0'; 6560 force_ent->device = simple_strtoul(p, &endp, 10); 6561 if (p == endp || *endp != '\0') { 6562 *reason = "invalid device"; 6563 return -EINVAL; 6564 } 6565 } 6566 6567 force_ent->port = simple_strtoul(id, &endp, 10); 6568 if (p == endp || *endp != '\0') { 6569 *reason = "invalid port/link"; 6570 return -EINVAL; 6571 } 6572 6573 parse_val: 6574 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */ 6575 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) { 6576 const struct ata_force_param *fp = &force_tbl[i]; 6577 6578 if (strncasecmp(val, fp->name, strlen(val))) 6579 continue; 6580 6581 nr_matches++; 6582 match_fp = fp; 6583 6584 if (strcasecmp(val, fp->name) == 0) { 6585 nr_matches = 1; 6586 break; 6587 } 6588 } 6589 6590 if (!nr_matches) { 6591 *reason = "unknown value"; 6592 return -EINVAL; 6593 } 6594 if (nr_matches > 1) { 6595 *reason = "ambigious value"; 6596 return -EINVAL; 6597 } 6598 6599 force_ent->param = *match_fp; 6600 6601 return 0; 6602 } 6603 6604 static void __init ata_parse_force_param(void) 6605 { 6606 int idx = 0, size = 1; 6607 int last_port = -1, last_device = -1; 6608 char *p, *cur, *next; 6609 6610 /* calculate maximum number of params and allocate force_tbl */ 6611 for (p = ata_force_param_buf; *p; p++) 6612 if (*p == ',') 6613 size++; 6614 6615 ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL); 6616 if (!ata_force_tbl) { 6617 printk(KERN_WARNING "ata: failed to extend force table, " 6618 "libata.force ignored\n"); 6619 return; 6620 } 6621 6622 /* parse and populate the table */ 6623 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) { 6624 const char *reason = ""; 6625 struct ata_force_ent te = { .port = -1, .device = -1 }; 6626 6627 next = cur; 6628 if (ata_parse_force_one(&next, &te, &reason)) { 6629 printk(KERN_WARNING "ata: failed to parse force " 6630 "parameter \"%s\" (%s)\n", 6631 cur, reason); 6632 continue; 6633 } 6634 6635 if (te.port == -1) { 6636 te.port = last_port; 6637 te.device = last_device; 6638 } 6639 6640 ata_force_tbl[idx++] = te; 6641 6642 last_port = te.port; 6643 last_device = te.device; 6644 } 6645 6646 ata_force_tbl_size = idx; 6647 } 6648 6649 static int __init ata_init(void) 6650 { 6651 int rc; 6652 6653 ata_parse_force_param(); 6654 6655 rc = ata_sff_init(); 6656 if (rc) { 6657 kfree(ata_force_tbl); 6658 return rc; 6659 } 6660 6661 libata_transport_init(); 6662 ata_scsi_transport_template = ata_attach_transport(); 6663 if (!ata_scsi_transport_template) { 6664 ata_sff_exit(); 6665 rc = -ENOMEM; 6666 goto err_out; 6667 } 6668 6669 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); 6670 return 0; 6671 6672 err_out: 6673 return rc; 6674 } 6675 6676 static void __exit ata_exit(void) 6677 { 6678 ata_release_transport(ata_scsi_transport_template); 6679 libata_transport_exit(); 6680 ata_sff_exit(); 6681 kfree(ata_force_tbl); 6682 } 6683 6684 subsys_initcall(ata_init); 6685 module_exit(ata_exit); 6686 6687 static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1); 6688 6689 int ata_ratelimit(void) 6690 { 6691 return __ratelimit(&ratelimit); 6692 } 6693 6694 /** 6695 * ata_msleep - ATA EH owner aware msleep 6696 * @ap: ATA port to attribute the sleep to 6697 * @msecs: duration to sleep in milliseconds 6698 * 6699 * Sleeps @msecs. If the current task is owner of @ap's EH, the 6700 * ownership is released before going to sleep and reacquired 6701 * after the sleep is complete. IOW, other ports sharing the 6702 * @ap->host will be allowed to own the EH while this task is 6703 * sleeping. 6704 * 6705 * LOCKING: 6706 * Might sleep. 6707 */ 6708 void ata_msleep(struct ata_port *ap, unsigned int msecs) 6709 { 6710 bool owns_eh = ap && ap->host->eh_owner == current; 6711 6712 if (owns_eh) 6713 ata_eh_release(ap); 6714 6715 msleep(msecs); 6716 6717 if (owns_eh) 6718 ata_eh_acquire(ap); 6719 } 6720 6721 /** 6722 * ata_wait_register - wait until register value changes 6723 * @ap: ATA port to wait register for, can be NULL 6724 * @reg: IO-mapped register 6725 * @mask: Mask to apply to read register value 6726 * @val: Wait condition 6727 * @interval: polling interval in milliseconds 6728 * @timeout: timeout in milliseconds 6729 * 6730 * Waiting for some bits of register to change is a common 6731 * operation for ATA controllers. This function reads 32bit LE 6732 * IO-mapped register @reg and tests for the following condition. 6733 * 6734 * (*@reg & mask) != val 6735 * 6736 * If the condition is met, it returns; otherwise, the process is 6737 * repeated after @interval_msec until timeout. 6738 * 6739 * LOCKING: 6740 * Kernel thread context (may sleep) 6741 * 6742 * RETURNS: 6743 * The final register value. 6744 */ 6745 u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val, 6746 unsigned long interval, unsigned long timeout) 6747 { 6748 unsigned long deadline; 6749 u32 tmp; 6750 6751 tmp = ioread32(reg); 6752 6753 /* Calculate timeout _after_ the first read to make sure 6754 * preceding writes reach the controller before starting to 6755 * eat away the timeout. 6756 */ 6757 deadline = ata_deadline(jiffies, timeout); 6758 6759 while ((tmp & mask) == val && time_before(jiffies, deadline)) { 6760 ata_msleep(ap, interval); 6761 tmp = ioread32(reg); 6762 } 6763 6764 return tmp; 6765 } 6766 6767 /** 6768 * sata_lpm_ignore_phy_events - test if PHY event should be ignored 6769 * @link: Link receiving the event 6770 * 6771 * Test whether the received PHY event has to be ignored or not. 6772 * 6773 * LOCKING: 6774 * None: 6775 * 6776 * RETURNS: 6777 * True if the event has to be ignored. 6778 */ 6779 bool sata_lpm_ignore_phy_events(struct ata_link *link) 6780 { 6781 unsigned long lpm_timeout = link->last_lpm_change + 6782 msecs_to_jiffies(ATA_TMOUT_SPURIOUS_PHY); 6783 6784 /* if LPM is enabled, PHYRDY doesn't mean anything */ 6785 if (link->lpm_policy > ATA_LPM_MAX_POWER) 6786 return true; 6787 6788 /* ignore the first PHY event after the LPM policy changed 6789 * as it is might be spurious 6790 */ 6791 if ((link->flags & ATA_LFLAG_CHANGED) && 6792 time_before(jiffies, lpm_timeout)) 6793 return true; 6794 6795 return false; 6796 } 6797 EXPORT_SYMBOL_GPL(sata_lpm_ignore_phy_events); 6798 6799 /* 6800 * Dummy port_ops 6801 */ 6802 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) 6803 { 6804 return AC_ERR_SYSTEM; 6805 } 6806 6807 static void ata_dummy_error_handler(struct ata_port *ap) 6808 { 6809 /* truly dummy */ 6810 } 6811 6812 struct ata_port_operations ata_dummy_port_ops = { 6813 .qc_prep = ata_noop_qc_prep, 6814 .qc_issue = ata_dummy_qc_issue, 6815 .error_handler = ata_dummy_error_handler, 6816 .sched_eh = ata_std_sched_eh, 6817 .end_eh = ata_std_end_eh, 6818 }; 6819 6820 const struct ata_port_info ata_dummy_port_info = { 6821 .port_ops = &ata_dummy_port_ops, 6822 }; 6823 6824 /* 6825 * Utility print functions 6826 */ 6827 void ata_port_printk(const struct ata_port *ap, const char *level, 6828 const char *fmt, ...) 6829 { 6830 struct va_format vaf; 6831 va_list args; 6832 6833 va_start(args, fmt); 6834 6835 vaf.fmt = fmt; 6836 vaf.va = &args; 6837 6838 printk("%sata%u: %pV", level, ap->print_id, &vaf); 6839 6840 va_end(args); 6841 } 6842 EXPORT_SYMBOL(ata_port_printk); 6843 6844 void ata_link_printk(const struct ata_link *link, const char *level, 6845 const char *fmt, ...) 6846 { 6847 struct va_format vaf; 6848 va_list args; 6849 6850 va_start(args, fmt); 6851 6852 vaf.fmt = fmt; 6853 vaf.va = &args; 6854 6855 if (sata_pmp_attached(link->ap) || link->ap->slave_link) 6856 printk("%sata%u.%02u: %pV", 6857 level, link->ap->print_id, link->pmp, &vaf); 6858 else 6859 printk("%sata%u: %pV", 6860 level, link->ap->print_id, &vaf); 6861 6862 va_end(args); 6863 } 6864 EXPORT_SYMBOL(ata_link_printk); 6865 6866 void ata_dev_printk(const struct ata_device *dev, const char *level, 6867 const char *fmt, ...) 6868 { 6869 struct va_format vaf; 6870 va_list args; 6871 6872 va_start(args, fmt); 6873 6874 vaf.fmt = fmt; 6875 vaf.va = &args; 6876 6877 printk("%sata%u.%02u: %pV", 6878 level, dev->link->ap->print_id, dev->link->pmp + dev->devno, 6879 &vaf); 6880 6881 va_end(args); 6882 } 6883 EXPORT_SYMBOL(ata_dev_printk); 6884 6885 void ata_print_version(const struct device *dev, const char *version) 6886 { 6887 dev_printk(KERN_DEBUG, dev, "version %s\n", version); 6888 } 6889 EXPORT_SYMBOL(ata_print_version); 6890 6891 /* 6892 * libata is essentially a library of internal helper functions for 6893 * low-level ATA host controller drivers. As such, the API/ABI is 6894 * likely to change as new drivers are added and updated. 6895 * Do not depend on ABI/API stability. 6896 */ 6897 EXPORT_SYMBOL_GPL(sata_deb_timing_normal); 6898 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); 6899 EXPORT_SYMBOL_GPL(sata_deb_timing_long); 6900 EXPORT_SYMBOL_GPL(ata_base_port_ops); 6901 EXPORT_SYMBOL_GPL(sata_port_ops); 6902 EXPORT_SYMBOL_GPL(ata_dummy_port_ops); 6903 EXPORT_SYMBOL_GPL(ata_dummy_port_info); 6904 EXPORT_SYMBOL_GPL(ata_link_next); 6905 EXPORT_SYMBOL_GPL(ata_dev_next); 6906 EXPORT_SYMBOL_GPL(ata_std_bios_param); 6907 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity); 6908 EXPORT_SYMBOL_GPL(ata_host_init); 6909 EXPORT_SYMBOL_GPL(ata_host_alloc); 6910 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); 6911 EXPORT_SYMBOL_GPL(ata_slave_link_init); 6912 EXPORT_SYMBOL_GPL(ata_host_start); 6913 EXPORT_SYMBOL_GPL(ata_host_register); 6914 EXPORT_SYMBOL_GPL(ata_host_activate); 6915 EXPORT_SYMBOL_GPL(ata_host_detach); 6916 EXPORT_SYMBOL_GPL(ata_sg_init); 6917 EXPORT_SYMBOL_GPL(ata_qc_complete); 6918 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); 6919 EXPORT_SYMBOL_GPL(atapi_cmd_type); 6920 EXPORT_SYMBOL_GPL(ata_tf_to_fis); 6921 EXPORT_SYMBOL_GPL(ata_tf_from_fis); 6922 EXPORT_SYMBOL_GPL(ata_pack_xfermask); 6923 EXPORT_SYMBOL_GPL(ata_unpack_xfermask); 6924 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode); 6925 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask); 6926 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift); 6927 EXPORT_SYMBOL_GPL(ata_mode_string); 6928 EXPORT_SYMBOL_GPL(ata_id_xfermask); 6929 EXPORT_SYMBOL_GPL(ata_do_set_mode); 6930 EXPORT_SYMBOL_GPL(ata_std_qc_defer); 6931 EXPORT_SYMBOL_GPL(ata_noop_qc_prep); 6932 EXPORT_SYMBOL_GPL(ata_dev_disable); 6933 EXPORT_SYMBOL_GPL(sata_set_spd); 6934 EXPORT_SYMBOL_GPL(ata_wait_after_reset); 6935 EXPORT_SYMBOL_GPL(sata_link_debounce); 6936 EXPORT_SYMBOL_GPL(sata_link_resume); 6937 EXPORT_SYMBOL_GPL(sata_link_scr_lpm); 6938 EXPORT_SYMBOL_GPL(ata_std_prereset); 6939 EXPORT_SYMBOL_GPL(sata_link_hardreset); 6940 EXPORT_SYMBOL_GPL(sata_std_hardreset); 6941 EXPORT_SYMBOL_GPL(ata_std_postreset); 6942 EXPORT_SYMBOL_GPL(ata_dev_classify); 6943 EXPORT_SYMBOL_GPL(ata_dev_pair); 6944 EXPORT_SYMBOL_GPL(ata_ratelimit); 6945 EXPORT_SYMBOL_GPL(ata_msleep); 6946 EXPORT_SYMBOL_GPL(ata_wait_register); 6947 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); 6948 EXPORT_SYMBOL_GPL(ata_scsi_slave_config); 6949 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); 6950 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); 6951 EXPORT_SYMBOL_GPL(__ata_change_queue_depth); 6952 EXPORT_SYMBOL_GPL(sata_scr_valid); 6953 EXPORT_SYMBOL_GPL(sata_scr_read); 6954 EXPORT_SYMBOL_GPL(sata_scr_write); 6955 EXPORT_SYMBOL_GPL(sata_scr_write_flush); 6956 EXPORT_SYMBOL_GPL(ata_link_online); 6957 EXPORT_SYMBOL_GPL(ata_link_offline); 6958 #ifdef CONFIG_PM 6959 EXPORT_SYMBOL_GPL(ata_host_suspend); 6960 EXPORT_SYMBOL_GPL(ata_host_resume); 6961 #endif /* CONFIG_PM */ 6962 EXPORT_SYMBOL_GPL(ata_id_string); 6963 EXPORT_SYMBOL_GPL(ata_id_c_string); 6964 EXPORT_SYMBOL_GPL(ata_do_dev_read_id); 6965 EXPORT_SYMBOL_GPL(ata_scsi_simulate); 6966 6967 EXPORT_SYMBOL_GPL(ata_pio_need_iordy); 6968 EXPORT_SYMBOL_GPL(ata_timing_find_mode); 6969 EXPORT_SYMBOL_GPL(ata_timing_compute); 6970 EXPORT_SYMBOL_GPL(ata_timing_merge); 6971 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode); 6972 6973 #ifdef CONFIG_PCI 6974 EXPORT_SYMBOL_GPL(pci_test_config_bits); 6975 EXPORT_SYMBOL_GPL(ata_pci_remove_one); 6976 #ifdef CONFIG_PM 6977 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); 6978 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); 6979 EXPORT_SYMBOL_GPL(ata_pci_device_suspend); 6980 EXPORT_SYMBOL_GPL(ata_pci_device_resume); 6981 #endif /* CONFIG_PM */ 6982 #endif /* CONFIG_PCI */ 6983 6984 EXPORT_SYMBOL_GPL(ata_platform_remove_one); 6985 6986 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); 6987 EXPORT_SYMBOL_GPL(ata_ehi_push_desc); 6988 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); 6989 EXPORT_SYMBOL_GPL(ata_port_desc); 6990 #ifdef CONFIG_PCI 6991 EXPORT_SYMBOL_GPL(ata_port_pbar_desc); 6992 #endif /* CONFIG_PCI */ 6993 EXPORT_SYMBOL_GPL(ata_port_schedule_eh); 6994 EXPORT_SYMBOL_GPL(ata_link_abort); 6995 EXPORT_SYMBOL_GPL(ata_port_abort); 6996 EXPORT_SYMBOL_GPL(ata_port_freeze); 6997 EXPORT_SYMBOL_GPL(sata_async_notification); 6998 EXPORT_SYMBOL_GPL(ata_eh_freeze_port); 6999 EXPORT_SYMBOL_GPL(ata_eh_thaw_port); 7000 EXPORT_SYMBOL_GPL(ata_eh_qc_complete); 7001 EXPORT_SYMBOL_GPL(ata_eh_qc_retry); 7002 EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error); 7003 EXPORT_SYMBOL_GPL(ata_do_eh); 7004 EXPORT_SYMBOL_GPL(ata_std_error_handler); 7005 7006 EXPORT_SYMBOL_GPL(ata_cable_40wire); 7007 EXPORT_SYMBOL_GPL(ata_cable_80wire); 7008 EXPORT_SYMBOL_GPL(ata_cable_unknown); 7009 EXPORT_SYMBOL_GPL(ata_cable_ignore); 7010 EXPORT_SYMBOL_GPL(ata_cable_sata); 7011