1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * libata-core.c - helper library for ATA 4 * 5 * Copyright 2003-2004 Red Hat, Inc. All rights reserved. 6 * Copyright 2003-2004 Jeff Garzik 7 * 8 * libata documentation is available via 'make {ps|pdf}docs', 9 * as Documentation/driver-api/libata.rst 10 * 11 * Hardware documentation available from http://www.t13.org/ and 12 * http://www.sata-io.org/ 13 * 14 * Standards documents from: 15 * http://www.t13.org (ATA standards, PCI DMA IDE spec) 16 * http://www.t10.org (SCSI MMC - for ATAPI MMC) 17 * http://www.sata-io.org (SATA) 18 * http://www.compactflash.org (CF) 19 * http://www.qic.org (QIC157 - Tape and DSC) 20 * http://www.ce-ata.org (CE-ATA: not supported) 21 * 22 * libata is essentially a library of internal helper functions for 23 * low-level ATA host controller drivers. As such, the API/ABI is 24 * likely to change as new drivers are added and updated. 25 * Do not depend on ABI/API stability. 26 */ 27 28 #include <linux/kernel.h> 29 #include <linux/module.h> 30 #include <linux/pci.h> 31 #include <linux/init.h> 32 #include <linux/list.h> 33 #include <linux/mm.h> 34 #include <linux/spinlock.h> 35 #include <linux/blkdev.h> 36 #include <linux/delay.h> 37 #include <linux/timer.h> 38 #include <linux/time.h> 39 #include <linux/interrupt.h> 40 #include <linux/completion.h> 41 #include <linux/suspend.h> 42 #include <linux/workqueue.h> 43 #include <linux/scatterlist.h> 44 #include <linux/io.h> 45 #include <linux/log2.h> 46 #include <linux/slab.h> 47 #include <linux/glob.h> 48 #include <scsi/scsi.h> 49 #include <scsi/scsi_cmnd.h> 50 #include <scsi/scsi_host.h> 51 #include <linux/libata.h> 52 #include <asm/byteorder.h> 53 #include <linux/unaligned.h> 54 #include <linux/cdrom.h> 55 #include <linux/ratelimit.h> 56 #include <linux/leds.h> 57 #include <linux/pm_runtime.h> 58 #include <linux/platform_device.h> 59 #include <asm/setup.h> 60 61 #define CREATE_TRACE_POINTS 62 #include <trace/events/libata.h> 63 64 #include "libata.h" 65 #include "libata-transport.h" 66 67 const struct ata_port_operations ata_base_port_ops = { 68 .reset.prereset = ata_std_prereset, 69 .reset.postreset = ata_std_postreset, 70 .error_handler = ata_std_error_handler, 71 .sched_eh = ata_std_sched_eh, 72 .end_eh = ata_std_end_eh, 73 }; 74 75 static unsigned int ata_dev_init_params(struct ata_device *dev, 76 u16 heads, u16 sectors); 77 static unsigned int ata_dev_set_xfermode(struct ata_device *dev); 78 static void ata_dev_xfermask(struct ata_device *dev); 79 static u64 ata_dev_quirks(const struct ata_device *dev); 80 static u64 ata_dev_get_quirk_value(struct ata_device *dev, u64 quirk); 81 82 static DEFINE_IDA(ata_ida); 83 84 #ifdef CONFIG_ATA_FORCE 85 struct ata_force_param { 86 const char *name; 87 u64 value; 88 u8 cbl; 89 u8 spd_limit; 90 unsigned int xfer_mask; 91 u64 quirk_on; 92 u64 quirk_off; 93 unsigned int pflags_on; 94 u16 lflags_on; 95 u16 lflags_off; 96 }; 97 98 struct ata_force_ent { 99 int port; 100 int device; 101 struct ata_force_param param; 102 }; 103 104 static struct ata_force_ent *ata_force_tbl; 105 static int ata_force_tbl_size; 106 107 static char ata_force_param_buf[COMMAND_LINE_SIZE] __initdata; 108 /* param_buf is thrown away after initialization, disallow read */ 109 module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0); 110 MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/admin-guide/kernel-parameters.rst for details)"); 111 #endif 112 113 static int atapi_enabled = 1; 114 module_param(atapi_enabled, int, 0444); 115 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])"); 116 117 static int atapi_dmadir = 0; 118 module_param(atapi_dmadir, int, 0444); 119 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)"); 120 121 int atapi_passthru16 = 1; 122 module_param(atapi_passthru16, int, 0444); 123 MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])"); 124 125 int libata_fua = 0; 126 module_param_named(fua, libata_fua, int, 0444); 127 MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)"); 128 129 static int ata_ignore_hpa; 130 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); 131 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); 132 133 static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; 134 module_param_named(dma, libata_dma_mask, int, 0444); 135 MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); 136 137 static int ata_probe_timeout; 138 module_param(ata_probe_timeout, int, 0444); 139 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); 140 141 int libata_noacpi = 0; 142 module_param_named(noacpi, libata_noacpi, int, 0444); 143 MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)"); 144 145 int libata_allow_tpm = 0; 146 module_param_named(allow_tpm, libata_allow_tpm, int, 0444); 147 MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)"); 148 149 static int atapi_an; 150 module_param(atapi_an, int, 0444); 151 MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)"); 152 153 MODULE_AUTHOR("Jeff Garzik"); 154 MODULE_DESCRIPTION("Library module for ATA devices"); 155 MODULE_LICENSE("GPL"); 156 MODULE_VERSION(DRV_VERSION); 157 158 static inline bool ata_dev_print_info(const struct ata_device *dev) 159 { 160 struct ata_eh_context *ehc = &dev->link->eh_context; 161 162 return ehc->i.flags & ATA_EHI_PRINTINFO; 163 } 164 165 /** 166 * ata_link_next - link iteration helper 167 * @link: the previous link, NULL to start 168 * @ap: ATA port containing links to iterate 169 * @mode: iteration mode, one of ATA_LITER_* 170 * 171 * LOCKING: 172 * Host lock or EH context. 173 * 174 * RETURNS: 175 * Pointer to the next link. 176 */ 177 struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap, 178 enum ata_link_iter_mode mode) 179 { 180 BUG_ON(mode != ATA_LITER_EDGE && 181 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST); 182 183 /* NULL link indicates start of iteration */ 184 if (!link) 185 switch (mode) { 186 case ATA_LITER_EDGE: 187 case ATA_LITER_PMP_FIRST: 188 if (sata_pmp_attached(ap)) 189 return ap->pmp_link; 190 fallthrough; 191 case ATA_LITER_HOST_FIRST: 192 return &ap->link; 193 } 194 195 /* we just iterated over the host link, what's next? */ 196 if (link == &ap->link) 197 switch (mode) { 198 case ATA_LITER_HOST_FIRST: 199 if (sata_pmp_attached(ap)) 200 return ap->pmp_link; 201 fallthrough; 202 case ATA_LITER_PMP_FIRST: 203 if (unlikely(ap->slave_link)) 204 return ap->slave_link; 205 fallthrough; 206 case ATA_LITER_EDGE: 207 return NULL; 208 } 209 210 /* slave_link excludes PMP */ 211 if (unlikely(link == ap->slave_link)) 212 return NULL; 213 214 /* we were over a PMP link */ 215 if (++link < ap->pmp_link + ap->nr_pmp_links) 216 return link; 217 218 if (mode == ATA_LITER_PMP_FIRST) 219 return &ap->link; 220 221 return NULL; 222 } 223 EXPORT_SYMBOL_GPL(ata_link_next); 224 225 /** 226 * ata_dev_next - device iteration helper 227 * @dev: the previous device, NULL to start 228 * @link: ATA link containing devices to iterate 229 * @mode: iteration mode, one of ATA_DITER_* 230 * 231 * LOCKING: 232 * Host lock or EH context. 233 * 234 * RETURNS: 235 * Pointer to the next device. 236 */ 237 struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link, 238 enum ata_dev_iter_mode mode) 239 { 240 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE && 241 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE); 242 243 /* NULL dev indicates start of iteration */ 244 if (!dev) 245 switch (mode) { 246 case ATA_DITER_ENABLED: 247 case ATA_DITER_ALL: 248 dev = link->device; 249 goto check; 250 case ATA_DITER_ENABLED_REVERSE: 251 case ATA_DITER_ALL_REVERSE: 252 dev = link->device + ata_link_max_devices(link) - 1; 253 goto check; 254 } 255 256 next: 257 /* move to the next one */ 258 switch (mode) { 259 case ATA_DITER_ENABLED: 260 case ATA_DITER_ALL: 261 if (++dev < link->device + ata_link_max_devices(link)) 262 goto check; 263 return NULL; 264 case ATA_DITER_ENABLED_REVERSE: 265 case ATA_DITER_ALL_REVERSE: 266 if (--dev >= link->device) 267 goto check; 268 return NULL; 269 } 270 271 check: 272 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) && 273 !ata_dev_enabled(dev)) 274 goto next; 275 return dev; 276 } 277 EXPORT_SYMBOL_GPL(ata_dev_next); 278 279 /** 280 * ata_dev_phys_link - find physical link for a device 281 * @dev: ATA device to look up physical link for 282 * 283 * Look up physical link which @dev is attached to. Note that 284 * this is different from @dev->link only when @dev is on slave 285 * link. For all other cases, it's the same as @dev->link. 286 * 287 * LOCKING: 288 * Don't care. 289 * 290 * RETURNS: 291 * Pointer to the found physical link. 292 */ 293 struct ata_link *ata_dev_phys_link(struct ata_device *dev) 294 { 295 struct ata_port *ap = dev->link->ap; 296 297 if (!ap->slave_link) 298 return dev->link; 299 if (!dev->devno) 300 return &ap->link; 301 return ap->slave_link; 302 } 303 304 #ifdef CONFIG_ATA_FORCE 305 /** 306 * ata_force_cbl - force cable type according to libata.force 307 * @ap: ATA port of interest 308 * 309 * Force cable type according to libata.force and whine about it. 310 * The last entry which has matching port number is used, so it 311 * can be specified as part of device force parameters. For 312 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the 313 * same effect. 314 * 315 * LOCKING: 316 * EH context. 317 */ 318 void ata_force_cbl(struct ata_port *ap) 319 { 320 int i; 321 322 for (i = ata_force_tbl_size - 1; i >= 0; i--) { 323 const struct ata_force_ent *fe = &ata_force_tbl[i]; 324 325 if (fe->port != -1 && fe->port != ap->print_id) 326 continue; 327 328 if (fe->param.cbl == ATA_CBL_NONE) 329 continue; 330 331 ap->cbl = fe->param.cbl; 332 ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name); 333 return; 334 } 335 } 336 337 /** 338 * ata_force_pflags - force port flags according to libata.force 339 * @ap: ATA port of interest 340 * 341 * Force port flags according to libata.force and whine about it. 342 * 343 * LOCKING: 344 * EH context. 345 */ 346 static void ata_force_pflags(struct ata_port *ap) 347 { 348 int i; 349 350 for (i = ata_force_tbl_size - 1; i >= 0; i--) { 351 const struct ata_force_ent *fe = &ata_force_tbl[i]; 352 353 if (fe->port != -1 && fe->port != ap->print_id) 354 continue; 355 356 /* let pflags stack */ 357 if (fe->param.pflags_on) { 358 ap->pflags |= fe->param.pflags_on; 359 ata_port_notice(ap, 360 "FORCE: port flag 0x%x forced -> 0x%x\n", 361 fe->param.pflags_on, ap->pflags); 362 } 363 } 364 } 365 366 /** 367 * ata_force_link_limits - force link limits according to libata.force 368 * @link: ATA link of interest 369 * 370 * Force link flags and SATA spd limit according to libata.force 371 * and whine about it. When only the port part is specified 372 * (e.g. 1:), the limit applies to all links connected to both 373 * the host link and all fan-out ports connected via PMP. If the 374 * device part is specified as 0 (e.g. 1.00:), it specifies the 375 * first fan-out link not the host link. Device number 15 always 376 * points to the host link whether PMP is attached or not. If the 377 * controller has slave link, device number 16 points to it. 378 * 379 * LOCKING: 380 * EH context. 381 */ 382 static void ata_force_link_limits(struct ata_link *link) 383 { 384 bool did_spd = false; 385 int linkno = link->pmp; 386 int i; 387 388 if (ata_is_host_link(link)) 389 linkno += 15; 390 391 for (i = ata_force_tbl_size - 1; i >= 0; i--) { 392 const struct ata_force_ent *fe = &ata_force_tbl[i]; 393 394 if (fe->port != -1 && fe->port != link->ap->print_id) 395 continue; 396 397 if (fe->device != -1 && fe->device != linkno) 398 continue; 399 400 /* only honor the first spd limit */ 401 if (!did_spd && fe->param.spd_limit) { 402 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1; 403 ata_link_notice(link, "FORCE: PHY spd limit set to %s\n", 404 fe->param.name); 405 did_spd = true; 406 } 407 408 /* let lflags stack */ 409 if (fe->param.lflags_on) { 410 link->flags |= fe->param.lflags_on; 411 ata_link_notice(link, 412 "FORCE: link flag 0x%x forced -> 0x%x\n", 413 fe->param.lflags_on, link->flags); 414 } 415 if (fe->param.lflags_off) { 416 link->flags &= ~fe->param.lflags_off; 417 ata_link_notice(link, 418 "FORCE: link flag 0x%x cleared -> 0x%x\n", 419 fe->param.lflags_off, link->flags); 420 } 421 } 422 } 423 424 /** 425 * ata_force_xfermask - force xfermask according to libata.force 426 * @dev: ATA device of interest 427 * 428 * Force xfer_mask according to libata.force and whine about it. 429 * For consistency with link selection, device number 15 selects 430 * the first device connected to the host link. 431 * 432 * LOCKING: 433 * EH context. 434 */ 435 static void ata_force_xfermask(struct ata_device *dev) 436 { 437 int devno = dev->link->pmp + dev->devno; 438 int alt_devno = devno; 439 int i; 440 441 /* allow n.15/16 for devices attached to host port */ 442 if (ata_is_host_link(dev->link)) 443 alt_devno += 15; 444 445 for (i = ata_force_tbl_size - 1; i >= 0; i--) { 446 const struct ata_force_ent *fe = &ata_force_tbl[i]; 447 unsigned int pio_mask, mwdma_mask, udma_mask; 448 449 if (fe->port != -1 && fe->port != dev->link->ap->print_id) 450 continue; 451 452 if (fe->device != -1 && fe->device != devno && 453 fe->device != alt_devno) 454 continue; 455 456 if (!fe->param.xfer_mask) 457 continue; 458 459 ata_unpack_xfermask(fe->param.xfer_mask, 460 &pio_mask, &mwdma_mask, &udma_mask); 461 if (udma_mask) 462 dev->udma_mask = udma_mask; 463 else if (mwdma_mask) { 464 dev->udma_mask = 0; 465 dev->mwdma_mask = mwdma_mask; 466 } else { 467 dev->udma_mask = 0; 468 dev->mwdma_mask = 0; 469 dev->pio_mask = pio_mask; 470 } 471 472 ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n", 473 fe->param.name); 474 return; 475 } 476 } 477 478 static const struct ata_force_ent * 479 ata_force_get_fe_for_dev(struct ata_device *dev) 480 { 481 const struct ata_force_ent *fe; 482 int devno = dev->link->pmp + dev->devno; 483 int alt_devno = devno; 484 int i; 485 486 /* allow n.15/16 for devices attached to host port */ 487 if (ata_is_host_link(dev->link)) 488 alt_devno += 15; 489 490 for (i = 0; i < ata_force_tbl_size; i++) { 491 fe = &ata_force_tbl[i]; 492 if (fe->port != -1 && fe->port != dev->link->ap->print_id) 493 continue; 494 495 if (fe->device != -1 && fe->device != devno && 496 fe->device != alt_devno) 497 continue; 498 499 return fe; 500 } 501 502 return NULL; 503 } 504 505 /** 506 * ata_force_quirks - force quirks according to libata.force 507 * @dev: ATA device of interest 508 * 509 * Force quirks according to libata.force and whine about it. 510 * For consistency with link selection, device number 15 selects 511 * the first device connected to the host link. 512 * 513 * LOCKING: 514 * EH context. 515 */ 516 static void ata_force_quirks(struct ata_device *dev) 517 { 518 const struct ata_force_ent *fe = ata_force_get_fe_for_dev(dev); 519 520 if (!fe) 521 return; 522 523 if (!(~dev->quirks & fe->param.quirk_on) && 524 !(dev->quirks & fe->param.quirk_off)) 525 return; 526 527 dev->quirks |= fe->param.quirk_on; 528 dev->quirks &= ~fe->param.quirk_off; 529 530 ata_dev_notice(dev, "FORCE: modified (%s)\n", fe->param.name); 531 } 532 #else 533 static inline void ata_force_pflags(struct ata_port *ap) { } 534 static inline void ata_force_link_limits(struct ata_link *link) { } 535 static inline void ata_force_xfermask(struct ata_device *dev) { } 536 static inline void ata_force_quirks(struct ata_device *dev) { } 537 #endif 538 539 /** 540 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode 541 * @opcode: SCSI opcode 542 * 543 * Determine ATAPI command type from @opcode. 544 * 545 * LOCKING: 546 * None. 547 * 548 * RETURNS: 549 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC} 550 */ 551 int atapi_cmd_type(u8 opcode) 552 { 553 switch (opcode) { 554 case GPCMD_READ_10: 555 case GPCMD_READ_12: 556 return ATAPI_READ; 557 558 case GPCMD_WRITE_10: 559 case GPCMD_WRITE_12: 560 case GPCMD_WRITE_AND_VERIFY_10: 561 return ATAPI_WRITE; 562 563 case GPCMD_READ_CD: 564 case GPCMD_READ_CD_MSF: 565 return ATAPI_READ_CD; 566 567 case ATA_16: 568 case ATA_12: 569 if (atapi_passthru16) 570 return ATAPI_PASS_THRU; 571 fallthrough; 572 default: 573 return ATAPI_MISC; 574 } 575 } 576 EXPORT_SYMBOL_GPL(atapi_cmd_type); 577 578 static const u8 ata_rw_cmds[] = { 579 /* pio multi */ 580 ATA_CMD_READ_MULTI, 581 ATA_CMD_WRITE_MULTI, 582 ATA_CMD_READ_MULTI_EXT, 583 ATA_CMD_WRITE_MULTI_EXT, 584 0, 585 0, 586 0, 587 0, 588 /* pio */ 589 ATA_CMD_PIO_READ, 590 ATA_CMD_PIO_WRITE, 591 ATA_CMD_PIO_READ_EXT, 592 ATA_CMD_PIO_WRITE_EXT, 593 0, 594 0, 595 0, 596 0, 597 /* dma */ 598 ATA_CMD_READ, 599 ATA_CMD_WRITE, 600 ATA_CMD_READ_EXT, 601 ATA_CMD_WRITE_EXT, 602 0, 603 0, 604 0, 605 ATA_CMD_WRITE_FUA_EXT 606 }; 607 608 /** 609 * ata_set_rwcmd_protocol - set taskfile r/w command and protocol 610 * @dev: target device for the taskfile 611 * @tf: taskfile to examine and configure 612 * 613 * Examine the device configuration and tf->flags to determine 614 * the proper read/write command and protocol to use for @tf. 615 * 616 * LOCKING: 617 * caller. 618 */ 619 static bool ata_set_rwcmd_protocol(struct ata_device *dev, 620 struct ata_taskfile *tf) 621 { 622 u8 cmd; 623 624 int index, fua, lba48, write; 625 626 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; 627 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; 628 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; 629 630 if (dev->flags & ATA_DFLAG_PIO) { 631 tf->protocol = ATA_PROT_PIO; 632 index = dev->multi_count ? 0 : 8; 633 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { 634 /* Unable to use DMA due to host limitation */ 635 tf->protocol = ATA_PROT_PIO; 636 index = dev->multi_count ? 0 : 8; 637 } else { 638 tf->protocol = ATA_PROT_DMA; 639 index = 16; 640 } 641 642 cmd = ata_rw_cmds[index + fua + lba48 + write]; 643 if (!cmd) 644 return false; 645 646 tf->command = cmd; 647 648 return true; 649 } 650 651 /** 652 * ata_tf_read_block - Read block address from ATA taskfile 653 * @tf: ATA taskfile of interest 654 * @dev: ATA device @tf belongs to 655 * 656 * LOCKING: 657 * None. 658 * 659 * Read block address from @tf. This function can handle all 660 * three address formats - LBA, LBA48 and CHS. tf->protocol and 661 * flags select the address format to use. 662 * 663 * RETURNS: 664 * Block address read from @tf. 665 */ 666 u64 ata_tf_read_block(const struct ata_taskfile *tf, struct ata_device *dev) 667 { 668 u64 block = 0; 669 670 if (tf->flags & ATA_TFLAG_LBA) { 671 if (tf->flags & ATA_TFLAG_LBA48) { 672 block |= (u64)tf->hob_lbah << 40; 673 block |= (u64)tf->hob_lbam << 32; 674 block |= (u64)tf->hob_lbal << 24; 675 } else 676 block |= (tf->device & 0xf) << 24; 677 678 block |= tf->lbah << 16; 679 block |= tf->lbam << 8; 680 block |= tf->lbal; 681 } else { 682 u32 cyl, head, sect; 683 684 cyl = tf->lbam | (tf->lbah << 8); 685 head = tf->device & 0xf; 686 sect = tf->lbal; 687 688 if (!sect) { 689 ata_dev_warn(dev, 690 "device reported invalid CHS sector 0\n"); 691 return U64_MAX; 692 } 693 694 block = (cyl * dev->heads + head) * dev->sectors + sect - 1; 695 } 696 697 return block; 698 } 699 700 /* 701 * Set a taskfile command duration limit index. 702 */ 703 static inline void ata_set_tf_cdl(struct ata_queued_cmd *qc, int cdl) 704 { 705 struct ata_taskfile *tf = &qc->tf; 706 707 if (tf->protocol == ATA_PROT_NCQ) 708 tf->auxiliary |= cdl; 709 else 710 tf->feature |= cdl; 711 712 /* 713 * Mark this command as having a CDL and request the result 714 * task file so that we can inspect the sense data available 715 * bit on completion. 716 */ 717 qc->flags |= ATA_QCFLAG_HAS_CDL | ATA_QCFLAG_RESULT_TF; 718 } 719 720 /** 721 * ata_build_rw_tf - Build ATA taskfile for given read/write request 722 * @qc: Metadata associated with the taskfile to build 723 * @block: Block address 724 * @n_block: Number of blocks 725 * @tf_flags: RW/FUA etc... 726 * @cdl: Command duration limit index 727 * @class: IO priority class 728 * 729 * LOCKING: 730 * None. 731 * 732 * Build ATA taskfile for the command @qc for read/write request described 733 * by @block, @n_block, @tf_flags and @class. 734 * 735 * RETURNS: 736 * 737 * 0 on success, -ERANGE if the request is too large for @dev, 738 * -EINVAL if the request is invalid. 739 */ 740 int ata_build_rw_tf(struct ata_queued_cmd *qc, u64 block, u32 n_block, 741 unsigned int tf_flags, int cdl, int class) 742 { 743 struct ata_taskfile *tf = &qc->tf; 744 struct ata_device *dev = qc->dev; 745 746 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 747 tf->flags |= tf_flags; 748 749 if (ata_ncq_enabled(dev)) { 750 /* yay, NCQ */ 751 if (!lba_48_ok(block, n_block)) 752 return -ERANGE; 753 754 tf->protocol = ATA_PROT_NCQ; 755 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; 756 757 if (tf->flags & ATA_TFLAG_WRITE) 758 tf->command = ATA_CMD_FPDMA_WRITE; 759 else 760 tf->command = ATA_CMD_FPDMA_READ; 761 762 tf->nsect = qc->hw_tag << 3; 763 tf->hob_feature = (n_block >> 8) & 0xff; 764 tf->feature = n_block & 0xff; 765 766 tf->hob_lbah = (block >> 40) & 0xff; 767 tf->hob_lbam = (block >> 32) & 0xff; 768 tf->hob_lbal = (block >> 24) & 0xff; 769 tf->lbah = (block >> 16) & 0xff; 770 tf->lbam = (block >> 8) & 0xff; 771 tf->lbal = block & 0xff; 772 773 tf->device = ATA_LBA; 774 if (tf->flags & ATA_TFLAG_FUA) 775 tf->device |= 1 << 7; 776 777 if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED && 778 class == IOPRIO_CLASS_RT) 779 tf->hob_nsect |= ATA_PRIO_HIGH << ATA_SHIFT_PRIO; 780 781 if ((dev->flags & ATA_DFLAG_CDL_ENABLED) && cdl) 782 ata_set_tf_cdl(qc, cdl); 783 784 } else if (dev->flags & ATA_DFLAG_LBA) { 785 tf->flags |= ATA_TFLAG_LBA; 786 787 if ((dev->flags & ATA_DFLAG_CDL_ENABLED) && cdl) 788 ata_set_tf_cdl(qc, cdl); 789 790 /* Both FUA writes and a CDL index require 48-bit commands */ 791 if (!(tf->flags & ATA_TFLAG_FUA) && 792 !(qc->flags & ATA_QCFLAG_HAS_CDL) && 793 lba_28_ok(block, n_block)) { 794 /* use LBA28 */ 795 tf->device |= (block >> 24) & 0xf; 796 } else if (lba_48_ok(block, n_block)) { 797 if (!(dev->flags & ATA_DFLAG_LBA48)) 798 return -ERANGE; 799 800 /* use LBA48 */ 801 tf->flags |= ATA_TFLAG_LBA48; 802 803 tf->hob_nsect = (n_block >> 8) & 0xff; 804 805 tf->hob_lbah = (block >> 40) & 0xff; 806 tf->hob_lbam = (block >> 32) & 0xff; 807 tf->hob_lbal = (block >> 24) & 0xff; 808 } else { 809 /* request too large even for LBA48 */ 810 return -ERANGE; 811 } 812 813 if (unlikely(!ata_set_rwcmd_protocol(dev, tf))) 814 return -EINVAL; 815 816 tf->nsect = n_block & 0xff; 817 818 tf->lbah = (block >> 16) & 0xff; 819 tf->lbam = (block >> 8) & 0xff; 820 tf->lbal = block & 0xff; 821 822 tf->device |= ATA_LBA; 823 } else { 824 /* CHS */ 825 u32 sect, head, cyl, track; 826 827 /* The request -may- be too large for CHS addressing. */ 828 if (!lba_28_ok(block, n_block)) 829 return -ERANGE; 830 831 if (unlikely(!ata_set_rwcmd_protocol(dev, tf))) 832 return -EINVAL; 833 834 /* Convert LBA to CHS */ 835 track = (u32)block / dev->sectors; 836 cyl = track / dev->heads; 837 head = track % dev->heads; 838 sect = (u32)block % dev->sectors + 1; 839 840 /* Check whether the converted CHS can fit. 841 Cylinder: 0-65535 842 Head: 0-15 843 Sector: 1-255*/ 844 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 845 return -ERANGE; 846 847 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 848 tf->lbal = sect; 849 tf->lbam = cyl; 850 tf->lbah = cyl >> 8; 851 tf->device |= head; 852 } 853 854 return 0; 855 } 856 857 /** 858 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask 859 * @pio_mask: pio_mask 860 * @mwdma_mask: mwdma_mask 861 * @udma_mask: udma_mask 862 * 863 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single 864 * unsigned int xfer_mask. 865 * 866 * LOCKING: 867 * None. 868 * 869 * RETURNS: 870 * Packed xfer_mask. 871 */ 872 unsigned int ata_pack_xfermask(unsigned int pio_mask, 873 unsigned int mwdma_mask, 874 unsigned int udma_mask) 875 { 876 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | 877 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | 878 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); 879 } 880 EXPORT_SYMBOL_GPL(ata_pack_xfermask); 881 882 /** 883 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks 884 * @xfer_mask: xfer_mask to unpack 885 * @pio_mask: resulting pio_mask 886 * @mwdma_mask: resulting mwdma_mask 887 * @udma_mask: resulting udma_mask 888 * 889 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. 890 * Any NULL destination masks will be ignored. 891 */ 892 void ata_unpack_xfermask(unsigned int xfer_mask, unsigned int *pio_mask, 893 unsigned int *mwdma_mask, unsigned int *udma_mask) 894 { 895 if (pio_mask) 896 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; 897 if (mwdma_mask) 898 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; 899 if (udma_mask) 900 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; 901 } 902 903 static const struct ata_xfer_ent { 904 int shift, bits; 905 u8 base; 906 } ata_xfer_tbl[] = { 907 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 }, 908 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 }, 909 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 }, 910 { -1, }, 911 }; 912 913 /** 914 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask 915 * @xfer_mask: xfer_mask of interest 916 * 917 * Return matching XFER_* value for @xfer_mask. Only the highest 918 * bit of @xfer_mask is considered. 919 * 920 * LOCKING: 921 * None. 922 * 923 * RETURNS: 924 * Matching XFER_* value, 0xff if no match found. 925 */ 926 u8 ata_xfer_mask2mode(unsigned int xfer_mask) 927 { 928 int highbit = fls(xfer_mask) - 1; 929 const struct ata_xfer_ent *ent; 930 931 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 932 if (highbit >= ent->shift && highbit < ent->shift + ent->bits) 933 return ent->base + highbit - ent->shift; 934 return 0xff; 935 } 936 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode); 937 938 /** 939 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* 940 * @xfer_mode: XFER_* of interest 941 * 942 * Return matching xfer_mask for @xfer_mode. 943 * 944 * LOCKING: 945 * None. 946 * 947 * RETURNS: 948 * Matching xfer_mask, 0 if no match found. 949 */ 950 unsigned int ata_xfer_mode2mask(u8 xfer_mode) 951 { 952 const struct ata_xfer_ent *ent; 953 954 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 955 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 956 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1) 957 & ~((1 << ent->shift) - 1); 958 return 0; 959 } 960 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask); 961 962 /** 963 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* 964 * @xfer_mode: XFER_* of interest 965 * 966 * Return matching xfer_shift for @xfer_mode. 967 * 968 * LOCKING: 969 * None. 970 * 971 * RETURNS: 972 * Matching xfer_shift, -1 if no match found. 973 */ 974 int ata_xfer_mode2shift(u8 xfer_mode) 975 { 976 const struct ata_xfer_ent *ent; 977 978 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 979 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 980 return ent->shift; 981 return -1; 982 } 983 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift); 984 985 /** 986 * ata_mode_string - convert xfer_mask to string 987 * @xfer_mask: mask of bits supported; only highest bit counts. 988 * 989 * Determine string which represents the highest speed 990 * (highest bit in @modemask). 991 * 992 * LOCKING: 993 * None. 994 * 995 * RETURNS: 996 * Constant C string representing highest speed listed in 997 * @mode_mask, or the constant C string "<n/a>". 998 */ 999 const char *ata_mode_string(unsigned int xfer_mask) 1000 { 1001 static const char * const xfer_mode_str[] = { 1002 "PIO0", 1003 "PIO1", 1004 "PIO2", 1005 "PIO3", 1006 "PIO4", 1007 "PIO5", 1008 "PIO6", 1009 "MWDMA0", 1010 "MWDMA1", 1011 "MWDMA2", 1012 "MWDMA3", 1013 "MWDMA4", 1014 "UDMA/16", 1015 "UDMA/25", 1016 "UDMA/33", 1017 "UDMA/44", 1018 "UDMA/66", 1019 "UDMA/100", 1020 "UDMA/133", 1021 "UDMA7", 1022 }; 1023 int highbit; 1024 1025 highbit = fls(xfer_mask) - 1; 1026 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) 1027 return xfer_mode_str[highbit]; 1028 return "<n/a>"; 1029 } 1030 EXPORT_SYMBOL_GPL(ata_mode_string); 1031 1032 const char *sata_spd_string(unsigned int spd) 1033 { 1034 static const char * const spd_str[] = { 1035 "1.5 Gbps", 1036 "3.0 Gbps", 1037 "6.0 Gbps", 1038 }; 1039 1040 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) 1041 return "<unknown>"; 1042 return spd_str[spd - 1]; 1043 } 1044 1045 /** 1046 * ata_dev_classify - determine device type based on ATA-spec signature 1047 * @tf: ATA taskfile register set for device to be identified 1048 * 1049 * Determine from taskfile register contents whether a device is 1050 * ATA or ATAPI, as per "Signature and persistence" section 1051 * of ATA/PI spec (volume 1, sect 5.14). 1052 * 1053 * LOCKING: 1054 * None. 1055 * 1056 * RETURNS: 1057 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP, 1058 * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure. 1059 */ 1060 unsigned int ata_dev_classify(const struct ata_taskfile *tf) 1061 { 1062 /* Apple's open source Darwin code hints that some devices only 1063 * put a proper signature into the LBA mid/high registers, 1064 * So, we only check those. It's sufficient for uniqueness. 1065 * 1066 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate 1067 * signatures for ATA and ATAPI devices attached on SerialATA, 1068 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA 1069 * spec has never mentioned about using different signatures 1070 * for ATA/ATAPI devices. Then, Serial ATA II: Port 1071 * Multiplier specification began to use 0x69/0x96 to identify 1072 * port multpliers and 0x3c/0xc3 to identify SEMB device. 1073 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and 1074 * 0x69/0x96 shortly and described them as reserved for 1075 * SerialATA. 1076 * 1077 * We follow the current spec and consider that 0x69/0x96 1078 * identifies a port multiplier and 0x3c/0xc3 a SEMB device. 1079 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports 1080 * SEMB signature. This is worked around in 1081 * ata_dev_read_id(). 1082 */ 1083 if (tf->lbam == 0 && tf->lbah == 0) 1084 return ATA_DEV_ATA; 1085 1086 if (tf->lbam == 0x14 && tf->lbah == 0xeb) 1087 return ATA_DEV_ATAPI; 1088 1089 if (tf->lbam == 0x69 && tf->lbah == 0x96) 1090 return ATA_DEV_PMP; 1091 1092 if (tf->lbam == 0x3c && tf->lbah == 0xc3) 1093 return ATA_DEV_SEMB; 1094 1095 if (tf->lbam == 0xcd && tf->lbah == 0xab) 1096 return ATA_DEV_ZAC; 1097 1098 return ATA_DEV_UNKNOWN; 1099 } 1100 EXPORT_SYMBOL_GPL(ata_dev_classify); 1101 1102 /** 1103 * ata_id_string - Convert IDENTIFY DEVICE page into string 1104 * @id: IDENTIFY DEVICE results we will examine 1105 * @s: string into which data is output 1106 * @ofs: offset into identify device page 1107 * @len: length of string to return. must be an even number. 1108 * 1109 * The strings in the IDENTIFY DEVICE page are broken up into 1110 * 16-bit chunks. Run through the string, and output each 1111 * 8-bit chunk linearly, regardless of platform. 1112 * 1113 * LOCKING: 1114 * caller. 1115 */ 1116 1117 void ata_id_string(const u16 *id, unsigned char *s, 1118 unsigned int ofs, unsigned int len) 1119 { 1120 unsigned int c; 1121 1122 BUG_ON(len & 1); 1123 1124 while (len > 0) { 1125 c = id[ofs] >> 8; 1126 *s = c; 1127 s++; 1128 1129 c = id[ofs] & 0xff; 1130 *s = c; 1131 s++; 1132 1133 ofs++; 1134 len -= 2; 1135 } 1136 } 1137 EXPORT_SYMBOL_GPL(ata_id_string); 1138 1139 /** 1140 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string 1141 * @id: IDENTIFY DEVICE results we will examine 1142 * @s: string into which data is output 1143 * @ofs: offset into identify device page 1144 * @len: length of string to return. must be an odd number. 1145 * 1146 * This function is identical to ata_id_string except that it 1147 * trims trailing spaces and terminates the resulting string with 1148 * null. @len must be actual maximum length (even number) + 1. 1149 * 1150 * LOCKING: 1151 * caller. 1152 */ 1153 void ata_id_c_string(const u16 *id, unsigned char *s, 1154 unsigned int ofs, unsigned int len) 1155 { 1156 unsigned char *p; 1157 1158 ata_id_string(id, s, ofs, len - 1); 1159 1160 p = s + strnlen(s, len - 1); 1161 while (p > s && p[-1] == ' ') 1162 p--; 1163 *p = '\0'; 1164 } 1165 EXPORT_SYMBOL_GPL(ata_id_c_string); 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 1173 return ata_id_u32(id, ATA_ID_LBA_CAPACITY); 1174 } 1175 1176 if (ata_id_current_chs_valid(id)) 1177 return (u32)id[ATA_ID_CUR_CYLS] * (u32)id[ATA_ID_CUR_HEADS] * 1178 (u32)id[ATA_ID_CUR_SECTORS]; 1179 1180 return (u32)id[ATA_ID_CYLS] * (u32)id[ATA_ID_HEADS] * 1181 (u32)id[ATA_ID_SECTORS]; 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.error & 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->quirks & ATA_QUIRK_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.error & (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 bool print_info = ata_dev_print_info(dev); 1333 bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA; 1334 u64 sectors = ata_id_n_sectors(dev->id); 1335 u64 native_sectors; 1336 int rc; 1337 1338 /* do we need to do it? */ 1339 if ((dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) || 1340 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || 1341 (dev->quirks & ATA_QUIRK_BROKEN_HPA)) 1342 return 0; 1343 1344 /* read native max address */ 1345 rc = ata_read_native_max_address(dev, &native_sectors); 1346 if (rc) { 1347 /* If device aborted the command or HPA isn't going to 1348 * be unlocked, skip HPA resizing. 1349 */ 1350 if (rc == -EACCES || !unlock_hpa) { 1351 ata_dev_warn(dev, 1352 "HPA support seems broken, skipping HPA handling\n"); 1353 dev->quirks |= ATA_QUIRK_BROKEN_HPA; 1354 1355 /* we can continue if device aborted the command */ 1356 if (rc == -EACCES) 1357 rc = 0; 1358 } 1359 1360 return rc; 1361 } 1362 dev->n_native_sectors = native_sectors; 1363 1364 /* nothing to do? */ 1365 if (native_sectors <= sectors || !unlock_hpa) { 1366 if (!print_info || native_sectors == sectors) 1367 return 0; 1368 1369 if (native_sectors > sectors) 1370 ata_dev_info(dev, 1371 "HPA detected: current %llu, native %llu\n", 1372 (unsigned long long)sectors, 1373 (unsigned long long)native_sectors); 1374 else if (native_sectors < sectors) 1375 ata_dev_warn(dev, 1376 "native sectors (%llu) is smaller than sectors (%llu)\n", 1377 (unsigned long long)native_sectors, 1378 (unsigned long long)sectors); 1379 return 0; 1380 } 1381 1382 /* let's unlock HPA */ 1383 rc = ata_set_max_sectors(dev, native_sectors); 1384 if (rc == -EACCES) { 1385 /* if device aborted the command, skip HPA resizing */ 1386 ata_dev_warn(dev, 1387 "device aborted resize (%llu -> %llu), skipping HPA handling\n", 1388 (unsigned long long)sectors, 1389 (unsigned long long)native_sectors); 1390 dev->quirks |= ATA_QUIRK_BROKEN_HPA; 1391 return 0; 1392 } else if (rc) 1393 return rc; 1394 1395 /* re-read IDENTIFY data */ 1396 rc = ata_dev_reread_id(dev, 0); 1397 if (rc) { 1398 ata_dev_err(dev, 1399 "failed to re-read IDENTIFY data after HPA resizing\n"); 1400 return rc; 1401 } 1402 1403 if (print_info) { 1404 u64 new_sectors = ata_id_n_sectors(dev->id); 1405 ata_dev_info(dev, 1406 "HPA unlocked: %llu -> %llu, native %llu\n", 1407 (unsigned long long)sectors, 1408 (unsigned long long)new_sectors, 1409 (unsigned long long)native_sectors); 1410 } 1411 1412 return 0; 1413 } 1414 1415 /** 1416 * ata_dump_id - IDENTIFY DEVICE info debugging output 1417 * @dev: device from which the information is fetched 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(struct ata_device *dev, const u16 *id) 1428 { 1429 ata_dev_dbg(dev, 1430 "49==0x%04x 53==0x%04x 63==0x%04x 64==0x%04x 75==0x%04x\n" 1431 "80==0x%04x 81==0x%04x 82==0x%04x 83==0x%04x 84==0x%04x\n" 1432 "88==0x%04x 93==0x%04x\n", 1433 id[49], id[53], id[63], id[64], id[75], id[80], 1434 id[81], id[82], id[83], id[84], id[88], id[93]); 1435 } 1436 1437 /** 1438 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data 1439 * @id: IDENTIFY data to compute xfer mask from 1440 * 1441 * Compute the xfermask for this device. This is not as trivial 1442 * as it seems if we must consider early devices correctly. 1443 * 1444 * FIXME: pre IDE drive timing (do we care ?). 1445 * 1446 * LOCKING: 1447 * None. 1448 * 1449 * RETURNS: 1450 * Computed xfermask 1451 */ 1452 unsigned int ata_id_xfermask(const u16 *id) 1453 { 1454 unsigned int pio_mask, mwdma_mask, udma_mask; 1455 1456 /* Usual case. Word 53 indicates word 64 is valid */ 1457 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { 1458 pio_mask = id[ATA_ID_PIO_MODES] & 0x03; 1459 pio_mask <<= 3; 1460 pio_mask |= 0x7; 1461 } else { 1462 /* If word 64 isn't valid then Word 51 high byte holds 1463 * the PIO timing number for the maximum. Turn it into 1464 * a mask. 1465 */ 1466 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; 1467 if (mode < 5) /* Valid PIO range */ 1468 pio_mask = (2 << mode) - 1; 1469 else 1470 pio_mask = 1; 1471 1472 /* But wait.. there's more. Design your standards by 1473 * committee and you too can get a free iordy field to 1474 * process. However it is the speeds not the modes that 1475 * are supported... Note drivers using the timing API 1476 * will get this right anyway 1477 */ 1478 } 1479 1480 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; 1481 1482 if (ata_id_is_cfa(id)) { 1483 /* 1484 * Process compact flash extended modes 1485 */ 1486 int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7; 1487 int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7; 1488 1489 if (pio) 1490 pio_mask |= (1 << 5); 1491 if (pio > 1) 1492 pio_mask |= (1 << 6); 1493 if (dma) 1494 mwdma_mask |= (1 << 3); 1495 if (dma > 1) 1496 mwdma_mask |= (1 << 4); 1497 } 1498 1499 udma_mask = 0; 1500 if (id[ATA_ID_FIELD_VALID] & (1 << 2)) 1501 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; 1502 1503 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 1504 } 1505 EXPORT_SYMBOL_GPL(ata_id_xfermask); 1506 1507 static void ata_qc_complete_internal(struct ata_queued_cmd *qc) 1508 { 1509 struct completion *waiting = qc->private_data; 1510 1511 complete(waiting); 1512 } 1513 1514 /** 1515 * ata_exec_internal - execute libata internal command 1516 * @dev: Device to which the command is sent 1517 * @tf: Taskfile registers for the command and the result 1518 * @cdb: CDB for packet command 1519 * @dma_dir: Data transfer direction of the command 1520 * @buf: Data buffer of the command 1521 * @buflen: Length of data buffer 1522 * @timeout: Timeout in msecs (0 for default) 1523 * 1524 * Executes libata internal command with timeout. @tf contains 1525 * the command on entry and the result on return. Timeout and error 1526 * conditions are reported via the return value. No recovery action 1527 * is taken after a command times out. It is the caller's duty to 1528 * clean up after timeout. 1529 * 1530 * LOCKING: 1531 * None. Should be called with kernel context, might sleep. 1532 * 1533 * RETURNS: 1534 * Zero on success, AC_ERR_* mask on failure 1535 */ 1536 unsigned int ata_exec_internal(struct ata_device *dev, struct ata_taskfile *tf, 1537 const u8 *cdb, enum dma_data_direction dma_dir, 1538 void *buf, unsigned int buflen, 1539 unsigned int timeout) 1540 { 1541 struct ata_link *link = dev->link; 1542 struct ata_port *ap = link->ap; 1543 const bool owns_eh_mutex = ap->host->eh_owner == current; 1544 u8 command = tf->command; 1545 struct ata_queued_cmd *qc; 1546 struct scatterlist sgl; 1547 unsigned int preempted_tag; 1548 u32 preempted_sactive; 1549 u64 preempted_qc_active; 1550 int preempted_nr_active_links; 1551 bool auto_timeout = false; 1552 DECLARE_COMPLETION_ONSTACK(wait); 1553 unsigned long flags; 1554 unsigned int err_mask; 1555 int rc; 1556 1557 if (WARN_ON(dma_dir != DMA_NONE && !buf)) 1558 return AC_ERR_INVALID; 1559 1560 spin_lock_irqsave(ap->lock, flags); 1561 1562 /* No internal command while frozen */ 1563 if (ata_port_is_frozen(ap)) { 1564 spin_unlock_irqrestore(ap->lock, flags); 1565 return AC_ERR_SYSTEM; 1566 } 1567 1568 /* Initialize internal qc */ 1569 qc = __ata_qc_from_tag(ap, ATA_TAG_INTERNAL); 1570 1571 qc->tag = ATA_TAG_INTERNAL; 1572 qc->hw_tag = 0; 1573 qc->scsicmd = NULL; 1574 qc->ap = ap; 1575 qc->dev = dev; 1576 ata_qc_reinit(qc); 1577 1578 preempted_tag = link->active_tag; 1579 preempted_sactive = link->sactive; 1580 preempted_qc_active = ap->qc_active; 1581 preempted_nr_active_links = ap->nr_active_links; 1582 link->active_tag = ATA_TAG_POISON; 1583 link->sactive = 0; 1584 ap->qc_active = 0; 1585 ap->nr_active_links = 0; 1586 1587 /* Prepare and issue qc */ 1588 qc->tf = *tf; 1589 if (cdb) 1590 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); 1591 1592 /* Some SATA bridges need us to indicate data xfer direction */ 1593 if (tf->protocol == ATAPI_PROT_DMA && (dev->flags & ATA_DFLAG_DMADIR) && 1594 dma_dir == DMA_FROM_DEVICE) 1595 qc->tf.feature |= ATAPI_DMADIR; 1596 1597 qc->flags |= ATA_QCFLAG_RESULT_TF; 1598 qc->dma_dir = dma_dir; 1599 if (dma_dir != DMA_NONE) { 1600 sg_init_one(&sgl, buf, buflen); 1601 ata_sg_init(qc, &sgl, 1); 1602 qc->nbytes = buflen; 1603 } 1604 1605 qc->private_data = &wait; 1606 qc->complete_fn = ata_qc_complete_internal; 1607 1608 ata_qc_issue(ap, qc); 1609 1610 spin_unlock_irqrestore(ap->lock, flags); 1611 1612 if (!timeout) { 1613 if (ata_probe_timeout) { 1614 timeout = ata_probe_timeout * 1000; 1615 } else { 1616 timeout = ata_internal_cmd_timeout(dev, command); 1617 auto_timeout = true; 1618 } 1619 } 1620 1621 if (owns_eh_mutex) { 1622 /* 1623 * To prevent that the compiler complains about the 1624 * ata_eh_release() call below. 1625 */ 1626 __acquire(&ap->host->eh_mutex); 1627 ata_eh_release(ap); 1628 } 1629 1630 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout)); 1631 1632 if (owns_eh_mutex) { 1633 ata_eh_acquire(ap); 1634 /* 1635 * To prevent that the compiler complains about the above 1636 * ata_eh_acquire() call. 1637 */ 1638 __release(&ap->host->eh_mutex); 1639 } 1640 1641 ata_sff_flush_pio_task(ap); 1642 1643 if (!rc) { 1644 /* 1645 * We are racing with irq here. If we lose, the following test 1646 * prevents us from completing the qc twice. If we win, the port 1647 * is frozen and will be cleaned up by ->post_internal_cmd(). 1648 */ 1649 spin_lock_irqsave(ap->lock, flags); 1650 if (qc->flags & ATA_QCFLAG_ACTIVE) { 1651 qc->err_mask |= AC_ERR_TIMEOUT; 1652 ata_port_freeze(ap); 1653 ata_dev_warn(dev, "qc timeout after %u msecs (cmd 0x%x)\n", 1654 timeout, command); 1655 } 1656 spin_unlock_irqrestore(ap->lock, flags); 1657 } 1658 1659 if (ap->ops->post_internal_cmd) 1660 ap->ops->post_internal_cmd(qc); 1661 1662 /* Perform minimal error analysis */ 1663 if (qc->flags & ATA_QCFLAG_EH) { 1664 if (qc->result_tf.status & (ATA_ERR | ATA_DF)) 1665 qc->err_mask |= AC_ERR_DEV; 1666 1667 if (!qc->err_mask) 1668 qc->err_mask |= AC_ERR_OTHER; 1669 1670 if (qc->err_mask & ~AC_ERR_OTHER) 1671 qc->err_mask &= ~AC_ERR_OTHER; 1672 } else if (qc->tf.command == ATA_CMD_REQ_SENSE_DATA) { 1673 qc->result_tf.status |= ATA_SENSE; 1674 } 1675 1676 /* Finish up */ 1677 spin_lock_irqsave(ap->lock, flags); 1678 1679 *tf = qc->result_tf; 1680 err_mask = qc->err_mask; 1681 1682 ata_qc_free(qc); 1683 link->active_tag = preempted_tag; 1684 link->sactive = preempted_sactive; 1685 ap->qc_active = preempted_qc_active; 1686 ap->nr_active_links = preempted_nr_active_links; 1687 1688 spin_unlock_irqrestore(ap->lock, flags); 1689 1690 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout) 1691 ata_internal_cmd_timed_out(dev, command); 1692 1693 return err_mask; 1694 } 1695 1696 /** 1697 * ata_pio_need_iordy - check if iordy needed 1698 * @adev: ATA device 1699 * 1700 * Check if the current speed of the device requires IORDY. Used 1701 * by various controllers for chip configuration. 1702 */ 1703 unsigned int ata_pio_need_iordy(const struct ata_device *adev) 1704 { 1705 /* Don't set IORDY if we're preparing for reset. IORDY may 1706 * lead to controller lock up on certain controllers if the 1707 * port is not occupied. See bko#11703 for details. 1708 */ 1709 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING) 1710 return 0; 1711 /* Controller doesn't support IORDY. Probably a pointless 1712 * check as the caller should know this. 1713 */ 1714 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) 1715 return 0; 1716 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */ 1717 if (ata_id_is_cfa(adev->id) 1718 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6)) 1719 return 0; 1720 /* PIO3 and higher it is mandatory */ 1721 if (adev->pio_mode > XFER_PIO_2) 1722 return 1; 1723 /* We turn it on when possible */ 1724 if (ata_id_has_iordy(adev->id)) 1725 return 1; 1726 return 0; 1727 } 1728 EXPORT_SYMBOL_GPL(ata_pio_need_iordy); 1729 1730 /** 1731 * ata_pio_mask_no_iordy - Return the non IORDY mask 1732 * @adev: ATA device 1733 * 1734 * Compute the highest mode possible if we are not using iordy. Return 1735 * -1 if no iordy mode is available. 1736 */ 1737 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) 1738 { 1739 /* If we have no drive specific rule, then PIO 2 is non IORDY */ 1740 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ 1741 u16 pio = adev->id[ATA_ID_EIDE_PIO]; 1742 /* Is the speed faster than the drive allows non IORDY ? */ 1743 if (pio) { 1744 /* This is cycle times not frequency - watch the logic! */ 1745 if (pio > 240) /* PIO2 is 240nS per cycle */ 1746 return 3 << ATA_SHIFT_PIO; 1747 return 7 << ATA_SHIFT_PIO; 1748 } 1749 } 1750 return 3 << ATA_SHIFT_PIO; 1751 } 1752 1753 /** 1754 * ata_do_dev_read_id - default ID read method 1755 * @dev: device 1756 * @tf: proposed taskfile 1757 * @id: data buffer 1758 * 1759 * Issue the identify taskfile and hand back the buffer containing 1760 * identify data. For some RAID controllers and for pre ATA devices 1761 * this function is wrapped or replaced by the driver 1762 */ 1763 unsigned int ata_do_dev_read_id(struct ata_device *dev, 1764 struct ata_taskfile *tf, __le16 *id) 1765 { 1766 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE, 1767 id, sizeof(id[0]) * ATA_ID_WORDS, 0); 1768 } 1769 EXPORT_SYMBOL_GPL(ata_do_dev_read_id); 1770 1771 /** 1772 * ata_dev_read_id - Read ID data from the specified device 1773 * @dev: target device 1774 * @p_class: pointer to class of the target device (may be changed) 1775 * @flags: ATA_READID_* flags 1776 * @id: buffer to read IDENTIFY data into 1777 * 1778 * Read ID data from the specified device. ATA_CMD_ID_ATA is 1779 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI 1780 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS 1781 * for pre-ATA4 drives. 1782 * 1783 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right 1784 * now we abort if we hit that case. 1785 * 1786 * LOCKING: 1787 * Kernel thread context (may sleep) 1788 * 1789 * RETURNS: 1790 * 0 on success, -errno otherwise. 1791 */ 1792 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, 1793 unsigned int flags, u16 *id) 1794 { 1795 struct ata_port *ap = dev->link->ap; 1796 unsigned int class = *p_class; 1797 struct ata_taskfile tf; 1798 unsigned int err_mask = 0; 1799 const char *reason; 1800 bool is_semb = class == ATA_DEV_SEMB; 1801 int may_fallback = 1, tried_spinup = 0; 1802 int rc; 1803 1804 retry: 1805 ata_tf_init(dev, &tf); 1806 1807 switch (class) { 1808 case ATA_DEV_SEMB: 1809 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */ 1810 fallthrough; 1811 case ATA_DEV_ATA: 1812 case ATA_DEV_ZAC: 1813 tf.command = ATA_CMD_ID_ATA; 1814 break; 1815 case ATA_DEV_ATAPI: 1816 tf.command = ATA_CMD_ID_ATAPI; 1817 break; 1818 default: 1819 rc = -ENODEV; 1820 reason = "unsupported class"; 1821 goto err_out; 1822 } 1823 1824 tf.protocol = ATA_PROT_PIO; 1825 1826 /* Some devices choke if TF registers contain garbage. Make 1827 * sure those are properly initialized. 1828 */ 1829 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1830 1831 /* Device presence detection is unreliable on some 1832 * controllers. Always poll IDENTIFY if available. 1833 */ 1834 tf.flags |= ATA_TFLAG_POLLING; 1835 1836 if (ap->ops->read_id) 1837 err_mask = ap->ops->read_id(dev, &tf, (__le16 *)id); 1838 else 1839 err_mask = ata_do_dev_read_id(dev, &tf, (__le16 *)id); 1840 1841 if (err_mask) { 1842 if (err_mask & AC_ERR_NODEV_HINT) { 1843 ata_dev_dbg(dev, "NODEV after polling detection\n"); 1844 return -ENOENT; 1845 } 1846 1847 if (is_semb) { 1848 ata_dev_info(dev, 1849 "IDENTIFY failed on device w/ SEMB sig, disabled\n"); 1850 /* SEMB is not supported yet */ 1851 *p_class = ATA_DEV_SEMB_UNSUP; 1852 return 0; 1853 } 1854 1855 if ((err_mask == AC_ERR_DEV) && (tf.error & ATA_ABORTED)) { 1856 /* Device or controller might have reported 1857 * the wrong device class. Give a shot at the 1858 * other IDENTIFY if the current one is 1859 * aborted by the device. 1860 */ 1861 if (may_fallback) { 1862 may_fallback = 0; 1863 1864 if (class == ATA_DEV_ATA) 1865 class = ATA_DEV_ATAPI; 1866 else 1867 class = ATA_DEV_ATA; 1868 goto retry; 1869 } 1870 1871 /* Control reaches here iff the device aborted 1872 * both flavors of IDENTIFYs which happens 1873 * sometimes with phantom devices. 1874 */ 1875 ata_dev_dbg(dev, 1876 "both IDENTIFYs aborted, assuming NODEV\n"); 1877 return -ENOENT; 1878 } 1879 1880 rc = -EIO; 1881 reason = "I/O error"; 1882 goto err_out; 1883 } 1884 1885 if (dev->quirks & ATA_QUIRK_DUMP_ID) { 1886 ata_dev_info(dev, "dumping IDENTIFY data, " 1887 "class=%d may_fallback=%d tried_spinup=%d\n", 1888 class, may_fallback, tried_spinup); 1889 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 1890 16, 2, id, ATA_ID_WORDS * sizeof(*id), true); 1891 } 1892 1893 /* Falling back doesn't make sense if ID data was read 1894 * successfully at least once. 1895 */ 1896 may_fallback = 0; 1897 1898 swap_buf_le16(id, ATA_ID_WORDS); 1899 1900 /* sanity check */ 1901 rc = -EINVAL; 1902 reason = "device reports invalid type"; 1903 1904 if (class == ATA_DEV_ATA || class == ATA_DEV_ZAC) { 1905 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) 1906 goto err_out; 1907 if (ap->host->flags & ATA_HOST_IGNORE_ATA && 1908 ata_id_is_ata(id)) { 1909 ata_dev_dbg(dev, 1910 "host indicates ignore ATA devices, ignored\n"); 1911 return -ENOENT; 1912 } 1913 } else { 1914 if (ata_id_is_ata(id)) 1915 goto err_out; 1916 } 1917 1918 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { 1919 tried_spinup = 1; 1920 /* 1921 * Drive powered-up in standby mode, and requires a specific 1922 * SET_FEATURES spin-up subcommand before it will accept 1923 * anything other than the original IDENTIFY command. 1924 */ 1925 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0); 1926 if (err_mask && id[2] != 0x738c) { 1927 rc = -EIO; 1928 reason = "SPINUP failed"; 1929 goto err_out; 1930 } 1931 /* 1932 * If the drive initially returned incomplete IDENTIFY info, 1933 * we now must reissue the IDENTIFY command. 1934 */ 1935 if (id[2] == 0x37c8) 1936 goto retry; 1937 } 1938 1939 if ((flags & ATA_READID_POSTRESET) && 1940 (class == ATA_DEV_ATA || class == ATA_DEV_ZAC)) { 1941 /* 1942 * The exact sequence expected by certain pre-ATA4 drives is: 1943 * SRST RESET 1944 * IDENTIFY (optional in early ATA) 1945 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA) 1946 * anything else.. 1947 * Some drives were very specific about that exact sequence. 1948 * 1949 * Note that ATA4 says lba is mandatory so the second check 1950 * should never trigger. 1951 */ 1952 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { 1953 err_mask = ata_dev_init_params(dev, id[3], id[6]); 1954 if (err_mask) { 1955 rc = -EIO; 1956 reason = "INIT_DEV_PARAMS failed"; 1957 goto err_out; 1958 } 1959 1960 /* current CHS translation info (id[53-58]) might be 1961 * changed. reread the identify device info. 1962 */ 1963 flags &= ~ATA_READID_POSTRESET; 1964 goto retry; 1965 } 1966 } 1967 1968 *p_class = class; 1969 1970 return 0; 1971 1972 err_out: 1973 ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n", 1974 reason, err_mask); 1975 return rc; 1976 } 1977 1978 bool ata_dev_power_init_tf(struct ata_device *dev, struct ata_taskfile *tf, 1979 bool set_active) 1980 { 1981 /* Only applies to ATA and ZAC devices */ 1982 if (dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) 1983 return false; 1984 1985 ata_tf_init(dev, tf); 1986 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1987 tf->protocol = ATA_PROT_NODATA; 1988 1989 if (set_active) { 1990 /* VERIFY for 1 sector at lba=0 */ 1991 tf->command = ATA_CMD_VERIFY; 1992 tf->nsect = 1; 1993 if (dev->flags & ATA_DFLAG_LBA) { 1994 tf->flags |= ATA_TFLAG_LBA; 1995 tf->device |= ATA_LBA; 1996 } else { 1997 /* CHS */ 1998 tf->lbal = 0x1; /* sect */ 1999 } 2000 } else { 2001 tf->command = ATA_CMD_STANDBYNOW1; 2002 } 2003 2004 return true; 2005 } 2006 2007 static bool ata_dev_power_is_active(struct ata_device *dev) 2008 { 2009 struct ata_taskfile tf; 2010 unsigned int err_mask; 2011 2012 ata_tf_init(dev, &tf); 2013 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 2014 tf.protocol = ATA_PROT_NODATA; 2015 tf.command = ATA_CMD_CHK_POWER; 2016 2017 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 2018 if (err_mask) { 2019 ata_dev_err(dev, "Check power mode failed (err_mask=0x%x)\n", 2020 err_mask); 2021 /* 2022 * Assume we are in standby mode so that we always force a 2023 * spinup in ata_dev_power_set_active(). 2024 */ 2025 return false; 2026 } 2027 2028 ata_dev_dbg(dev, "Power mode: 0x%02x\n", tf.nsect); 2029 2030 /* Active or idle */ 2031 return tf.nsect == 0xff; 2032 } 2033 2034 /** 2035 * ata_dev_power_set_standby - Set a device power mode to standby 2036 * @dev: target device 2037 * 2038 * Issue a STANDBY IMMEDIATE command to set a device power mode to standby. 2039 * For an HDD device, this spins down the disks. 2040 * 2041 * LOCKING: 2042 * Kernel thread context (may sleep). 2043 */ 2044 void ata_dev_power_set_standby(struct ata_device *dev) 2045 { 2046 unsigned long ap_flags = dev->link->ap->flags; 2047 struct ata_taskfile tf; 2048 unsigned int err_mask; 2049 2050 /* If the device is already sleeping or in standby, do nothing. */ 2051 if ((dev->flags & ATA_DFLAG_SLEEPING) || 2052 !ata_dev_power_is_active(dev)) 2053 return; 2054 2055 /* 2056 * Some odd clown BIOSes issue spindown on power off (ACPI S4 or S5) 2057 * causing some drives to spin up and down again. For these, do nothing 2058 * if we are being called on shutdown. 2059 */ 2060 if ((ap_flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 2061 system_state == SYSTEM_POWER_OFF) 2062 return; 2063 2064 if ((ap_flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 2065 system_entering_hibernation()) 2066 return; 2067 2068 /* Issue STANDBY IMMEDIATE command only if supported by the device */ 2069 if (!ata_dev_power_init_tf(dev, &tf, false)) 2070 return; 2071 2072 ata_dev_notice(dev, "Entering standby power mode\n"); 2073 2074 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 2075 if (err_mask) 2076 ata_dev_err(dev, "STANDBY IMMEDIATE failed (err_mask=0x%x)\n", 2077 err_mask); 2078 } 2079 2080 /** 2081 * ata_dev_power_set_active - Set a device power mode to active 2082 * @dev: target device 2083 * 2084 * Issue a VERIFY command to enter to ensure that the device is in the 2085 * active power mode. For a spun-down HDD (standby or idle power mode), 2086 * the VERIFY command will complete after the disk spins up. 2087 * 2088 * LOCKING: 2089 * Kernel thread context (may sleep). 2090 */ 2091 void ata_dev_power_set_active(struct ata_device *dev) 2092 { 2093 struct ata_taskfile tf; 2094 unsigned int err_mask; 2095 2096 /* 2097 * Issue READ VERIFY SECTORS command for 1 sector at lba=0 only 2098 * if supported by the device. 2099 */ 2100 if (!ata_dev_power_init_tf(dev, &tf, true)) 2101 return; 2102 2103 /* 2104 * Check the device power state & condition and force a spinup with 2105 * VERIFY command only if the drive is not already ACTIVE or IDLE. 2106 */ 2107 if (ata_dev_power_is_active(dev)) 2108 return; 2109 2110 ata_dev_notice(dev, "Entering active power mode\n"); 2111 2112 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 2113 if (err_mask) 2114 ata_dev_err(dev, "VERIFY failed (err_mask=0x%x)\n", 2115 err_mask); 2116 } 2117 2118 /** 2119 * ata_read_log_page - read a specific log page 2120 * @dev: target device 2121 * @log: log to read 2122 * @page: page to read 2123 * @buf: buffer to store read page 2124 * @sectors: number of sectors to read 2125 * 2126 * Read log page using READ_LOG_EXT command. 2127 * 2128 * LOCKING: 2129 * Kernel thread context (may sleep). 2130 * 2131 * RETURNS: 2132 * 0 on success, AC_ERR_* mask otherwise. 2133 */ 2134 unsigned int ata_read_log_page(struct ata_device *dev, u8 log, 2135 u8 page, void *buf, unsigned int sectors) 2136 { 2137 unsigned long ap_flags = dev->link->ap->flags; 2138 struct ata_taskfile tf; 2139 unsigned int err_mask; 2140 bool dma = false; 2141 2142 ata_dev_dbg(dev, "read log page - log 0x%x, page 0x%x\n", log, page); 2143 2144 /* 2145 * Return error without actually issuing the command on controllers 2146 * which e.g. lockup on a read log page. 2147 */ 2148 if (ap_flags & ATA_FLAG_NO_LOG_PAGE) 2149 return AC_ERR_DEV; 2150 2151 retry: 2152 ata_tf_init(dev, &tf); 2153 if (ata_dma_enabled(dev) && ata_id_has_read_log_dma_ext(dev->id) && 2154 !(dev->quirks & ATA_QUIRK_NO_DMA_LOG)) { 2155 tf.command = ATA_CMD_READ_LOG_DMA_EXT; 2156 tf.protocol = ATA_PROT_DMA; 2157 dma = true; 2158 } else { 2159 tf.command = ATA_CMD_READ_LOG_EXT; 2160 tf.protocol = ATA_PROT_PIO; 2161 dma = false; 2162 } 2163 tf.lbal = log; 2164 tf.lbam = page; 2165 tf.nsect = sectors; 2166 tf.hob_nsect = sectors >> 8; 2167 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE; 2168 2169 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, 2170 buf, sectors * ATA_SECT_SIZE, 0); 2171 2172 if (err_mask) { 2173 if (dma) { 2174 dev->quirks |= ATA_QUIRK_NO_DMA_LOG; 2175 if (!ata_port_is_frozen(dev->link->ap)) 2176 goto retry; 2177 } 2178 ata_dev_err(dev, 2179 "Read log 0x%02x page 0x%02x failed, Emask 0x%x\n", 2180 (unsigned int)log, (unsigned int)page, err_mask); 2181 } 2182 2183 return err_mask; 2184 } 2185 2186 static inline void ata_clear_log_directory(struct ata_device *dev) 2187 { 2188 memset(dev->gp_log_dir, 0, ATA_SECT_SIZE); 2189 } 2190 2191 static int ata_read_log_directory(struct ata_device *dev) 2192 { 2193 u16 version; 2194 2195 /* If the log page is already cached, do nothing. */ 2196 version = get_unaligned_le16(&dev->gp_log_dir[0]); 2197 if (version == 0x0001) 2198 return 0; 2199 2200 if (ata_read_log_page(dev, ATA_LOG_DIRECTORY, 0, dev->gp_log_dir, 1)) { 2201 ata_clear_log_directory(dev); 2202 return -EIO; 2203 } 2204 2205 version = get_unaligned_le16(&dev->gp_log_dir[0]); 2206 if (version != 0x0001) 2207 ata_dev_warn_once(dev, 2208 "Invalid log directory version 0x%04x\n", 2209 version); 2210 2211 return 0; 2212 } 2213 2214 static int ata_log_supported(struct ata_device *dev, u8 log) 2215 { 2216 if (dev->quirks & ATA_QUIRK_NO_LOG_DIR) 2217 return 0; 2218 2219 if (ata_read_log_directory(dev)) 2220 return 0; 2221 2222 return get_unaligned_le16(&dev->gp_log_dir[log * 2]); 2223 } 2224 2225 static bool ata_identify_page_supported(struct ata_device *dev, u8 page) 2226 { 2227 unsigned int err, i; 2228 2229 if (dev->quirks & ATA_QUIRK_NO_ID_DEV_LOG) 2230 return false; 2231 2232 if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE)) { 2233 /* 2234 * IDENTIFY DEVICE data log is defined as mandatory starting 2235 * with ACS-3 (ATA version 10). Warn about the missing log 2236 * for drives which implement this ATA level or above. 2237 */ 2238 if (ata_id_major_version(dev->id) >= 10) 2239 ata_dev_warn(dev, 2240 "ATA Identify Device Log not supported\n"); 2241 dev->quirks |= ATA_QUIRK_NO_ID_DEV_LOG; 2242 return false; 2243 } 2244 2245 /* 2246 * Read IDENTIFY DEVICE data log, page 0, to figure out if the page is 2247 * supported. 2248 */ 2249 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 0, 2250 dev->sector_buf, 1); 2251 if (err) 2252 return false; 2253 2254 for (i = 0; i < dev->sector_buf[8]; i++) { 2255 if (dev->sector_buf[9 + i] == page) 2256 return true; 2257 } 2258 2259 return false; 2260 } 2261 2262 static int ata_do_link_spd_quirk(struct ata_device *dev) 2263 { 2264 struct ata_link *plink = ata_dev_phys_link(dev); 2265 u32 target, target_limit; 2266 2267 if (!sata_scr_valid(plink)) 2268 return 0; 2269 2270 if (dev->quirks & ATA_QUIRK_1_5_GBPS) 2271 target = 1; 2272 else 2273 return 0; 2274 2275 target_limit = (1 << target) - 1; 2276 2277 /* if already on stricter limit, no need to push further */ 2278 if (plink->sata_spd_limit <= target_limit) 2279 return 0; 2280 2281 plink->sata_spd_limit = target_limit; 2282 2283 /* Request another EH round by returning -EAGAIN if link is 2284 * going faster than the target speed. Forward progress is 2285 * guaranteed by setting sata_spd_limit to target_limit above. 2286 */ 2287 if (plink->sata_spd > target) { 2288 ata_dev_info(dev, "applying link speed limit quirk to %s\n", 2289 sata_spd_string(target)); 2290 return -EAGAIN; 2291 } 2292 return 0; 2293 } 2294 2295 static inline bool ata_dev_knobble(struct ata_device *dev) 2296 { 2297 struct ata_port *ap = dev->link->ap; 2298 2299 if (ata_dev_quirks(dev) & ATA_QUIRK_BRIDGE_OK) 2300 return false; 2301 2302 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); 2303 } 2304 2305 static void ata_dev_config_ncq_send_recv(struct ata_device *dev) 2306 { 2307 unsigned int err_mask; 2308 2309 if (!ata_log_supported(dev, ATA_LOG_NCQ_SEND_RECV)) { 2310 ata_dev_warn(dev, "NCQ Send/Recv Log not supported\n"); 2311 return; 2312 } 2313 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_SEND_RECV, 2314 0, dev->sector_buf, 1); 2315 if (!err_mask) { 2316 u8 *cmds = dev->ncq_send_recv_cmds; 2317 2318 dev->flags |= ATA_DFLAG_NCQ_SEND_RECV; 2319 memcpy(cmds, dev->sector_buf, ATA_LOG_NCQ_SEND_RECV_SIZE); 2320 2321 if (dev->quirks & ATA_QUIRK_NO_NCQ_TRIM) { 2322 ata_dev_dbg(dev, "disabling queued TRIM support\n"); 2323 cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &= 2324 ~ATA_LOG_NCQ_SEND_RECV_DSM_TRIM; 2325 } 2326 } 2327 } 2328 2329 static void ata_dev_config_ncq_non_data(struct ata_device *dev) 2330 { 2331 unsigned int err_mask; 2332 2333 if (!ata_log_supported(dev, ATA_LOG_NCQ_NON_DATA)) { 2334 ata_dev_warn(dev, 2335 "NCQ Non-Data Log not supported\n"); 2336 return; 2337 } 2338 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_NON_DATA, 2339 0, dev->sector_buf, 1); 2340 if (!err_mask) 2341 memcpy(dev->ncq_non_data_cmds, dev->sector_buf, 2342 ATA_LOG_NCQ_NON_DATA_SIZE); 2343 } 2344 2345 static void ata_dev_config_ncq_prio(struct ata_device *dev) 2346 { 2347 unsigned int err_mask; 2348 2349 if (!ata_identify_page_supported(dev, ATA_LOG_SATA_SETTINGS)) 2350 return; 2351 2352 err_mask = ata_read_log_page(dev, 2353 ATA_LOG_IDENTIFY_DEVICE, 2354 ATA_LOG_SATA_SETTINGS, 2355 dev->sector_buf, 1); 2356 if (err_mask) 2357 goto not_supported; 2358 2359 if (!(dev->sector_buf[ATA_LOG_NCQ_PRIO_OFFSET] & BIT(3))) 2360 goto not_supported; 2361 2362 dev->flags |= ATA_DFLAG_NCQ_PRIO; 2363 2364 return; 2365 2366 not_supported: 2367 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLED; 2368 dev->flags &= ~ATA_DFLAG_NCQ_PRIO; 2369 } 2370 2371 static bool ata_dev_check_adapter(struct ata_device *dev, 2372 unsigned short vendor_id) 2373 { 2374 struct pci_dev *pcidev = NULL; 2375 struct device *parent_dev = NULL; 2376 2377 for (parent_dev = dev->tdev.parent; parent_dev != NULL; 2378 parent_dev = parent_dev->parent) { 2379 if (dev_is_pci(parent_dev)) { 2380 pcidev = to_pci_dev(parent_dev); 2381 if (pcidev->vendor == vendor_id) 2382 return true; 2383 break; 2384 } 2385 } 2386 2387 return false; 2388 } 2389 2390 bool ata_adapter_is_online(struct ata_port *ap) 2391 { 2392 struct device *dev; 2393 2394 if (!ap || !ap->host) 2395 return false; 2396 2397 dev = ap->host->dev; 2398 if (!dev) 2399 return false; 2400 2401 if (dev_is_pci(dev) && 2402 pci_channel_offline(to_pci_dev(dev))) 2403 return false; 2404 2405 return true; 2406 } 2407 2408 static int ata_dev_config_ncq(struct ata_device *dev, 2409 char *desc, size_t desc_sz) 2410 { 2411 struct ata_port *ap = dev->link->ap; 2412 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); 2413 unsigned int err_mask; 2414 char *aa_desc = ""; 2415 2416 if (!ata_id_has_ncq(dev->id)) { 2417 desc[0] = '\0'; 2418 return 0; 2419 } 2420 if (!IS_ENABLED(CONFIG_SATA_HOST)) 2421 return 0; 2422 if (dev->quirks & ATA_QUIRK_NONCQ) { 2423 snprintf(desc, desc_sz, "NCQ (not used)"); 2424 return 0; 2425 } 2426 2427 if (dev->quirks & ATA_QUIRK_NO_NCQ_ON_ATI && 2428 ata_dev_check_adapter(dev, PCI_VENDOR_ID_ATI)) { 2429 snprintf(desc, desc_sz, "NCQ (not used)"); 2430 return 0; 2431 } 2432 2433 if (ap->flags & ATA_FLAG_NCQ) { 2434 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE); 2435 dev->flags |= ATA_DFLAG_NCQ; 2436 } 2437 2438 if (!(dev->quirks & ATA_QUIRK_BROKEN_FPDMA_AA) && 2439 (ap->flags & ATA_FLAG_FPDMA_AA) && 2440 ata_id_has_fpdma_aa(dev->id)) { 2441 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE, 2442 SATA_FPDMA_AA); 2443 if (err_mask) { 2444 ata_dev_err(dev, 2445 "failed to enable AA (error_mask=0x%x)\n", 2446 err_mask); 2447 if (err_mask != AC_ERR_DEV) { 2448 dev->quirks |= ATA_QUIRK_BROKEN_FPDMA_AA; 2449 return -EIO; 2450 } 2451 } else 2452 aa_desc = ", AA"; 2453 } 2454 2455 if (hdepth >= ddepth) 2456 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc); 2457 else 2458 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth, 2459 ddepth, aa_desc); 2460 2461 if ((ap->flags & ATA_FLAG_FPDMA_AUX)) { 2462 if (ata_id_has_ncq_send_and_recv(dev->id)) 2463 ata_dev_config_ncq_send_recv(dev); 2464 if (ata_id_has_ncq_non_data(dev->id)) 2465 ata_dev_config_ncq_non_data(dev); 2466 if (ata_id_has_ncq_prio(dev->id)) 2467 ata_dev_config_ncq_prio(dev); 2468 } 2469 2470 return 0; 2471 } 2472 2473 static void ata_dev_config_sense_reporting(struct ata_device *dev) 2474 { 2475 unsigned int err_mask; 2476 2477 if (!ata_id_has_sense_reporting(dev->id)) 2478 return; 2479 2480 if (ata_id_sense_reporting_enabled(dev->id)) 2481 return; 2482 2483 err_mask = ata_dev_set_feature(dev, SETFEATURE_SENSE_DATA, 0x1); 2484 if (err_mask) { 2485 ata_dev_dbg(dev, 2486 "failed to enable Sense Data Reporting, Emask 0x%x\n", 2487 err_mask); 2488 } 2489 } 2490 2491 static void ata_dev_config_zac(struct ata_device *dev) 2492 { 2493 unsigned int err_mask; 2494 u8 *identify_buf = dev->sector_buf; 2495 2496 dev->zac_zones_optimal_open = U32_MAX; 2497 dev->zac_zones_optimal_nonseq = U32_MAX; 2498 dev->zac_zones_max_open = U32_MAX; 2499 2500 if (!ata_dev_is_zac(dev)) 2501 return; 2502 2503 if (!ata_identify_page_supported(dev, ATA_LOG_ZONED_INFORMATION)) { 2504 ata_dev_warn(dev, 2505 "ATA Zoned Information Log not supported\n"); 2506 return; 2507 } 2508 2509 /* 2510 * Read IDENTIFY DEVICE data log, page 9 (Zoned-device information) 2511 */ 2512 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 2513 ATA_LOG_ZONED_INFORMATION, 2514 identify_buf, 1); 2515 if (!err_mask) { 2516 u64 zoned_cap, opt_open, opt_nonseq, max_open; 2517 2518 zoned_cap = get_unaligned_le64(&identify_buf[8]); 2519 if ((zoned_cap >> 63)) 2520 dev->zac_zoned_cap = (zoned_cap & 1); 2521 opt_open = get_unaligned_le64(&identify_buf[24]); 2522 if ((opt_open >> 63)) 2523 dev->zac_zones_optimal_open = (u32)opt_open; 2524 opt_nonseq = get_unaligned_le64(&identify_buf[32]); 2525 if ((opt_nonseq >> 63)) 2526 dev->zac_zones_optimal_nonseq = (u32)opt_nonseq; 2527 max_open = get_unaligned_le64(&identify_buf[40]); 2528 if ((max_open >> 63)) 2529 dev->zac_zones_max_open = (u32)max_open; 2530 } 2531 } 2532 2533 static void ata_dev_config_trusted(struct ata_device *dev) 2534 { 2535 u64 trusted_cap; 2536 unsigned int err; 2537 2538 if (!ata_id_has_trusted(dev->id)) 2539 return; 2540 2541 if (!ata_identify_page_supported(dev, ATA_LOG_SECURITY)) { 2542 ata_dev_warn(dev, 2543 "Security Log not supported\n"); 2544 return; 2545 } 2546 2547 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, ATA_LOG_SECURITY, 2548 dev->sector_buf, 1); 2549 if (err) 2550 return; 2551 2552 trusted_cap = get_unaligned_le64(&dev->sector_buf[40]); 2553 if (!(trusted_cap & (1ULL << 63))) { 2554 ata_dev_dbg(dev, 2555 "Trusted Computing capability qword not valid!\n"); 2556 return; 2557 } 2558 2559 if (trusted_cap & (1 << 0)) 2560 dev->flags |= ATA_DFLAG_TRUSTED; 2561 } 2562 2563 static void ata_dev_cleanup_cdl_resources(struct ata_device *dev) 2564 { 2565 kfree(dev->cdl); 2566 dev->cdl = NULL; 2567 } 2568 2569 static int ata_dev_init_cdl_resources(struct ata_device *dev) 2570 { 2571 struct ata_cdl *cdl = dev->cdl; 2572 unsigned int err_mask; 2573 2574 if (!cdl) { 2575 cdl = kzalloc_obj(*cdl); 2576 if (!cdl) 2577 return -ENOMEM; 2578 dev->cdl = cdl; 2579 } 2580 2581 err_mask = ata_read_log_page(dev, ATA_LOG_CDL, 0, cdl->desc_log_buf, 2582 ATA_LOG_CDL_SIZE / ATA_SECT_SIZE); 2583 if (err_mask) { 2584 ata_dev_warn(dev, "Read Command Duration Limits log failed\n"); 2585 ata_dev_cleanup_cdl_resources(dev); 2586 return -EIO; 2587 } 2588 2589 return 0; 2590 } 2591 2592 static void ata_dev_config_cdl(struct ata_device *dev) 2593 { 2594 unsigned int err_mask; 2595 bool cdl_enabled; 2596 u64 val; 2597 int ret; 2598 2599 if (ata_id_major_version(dev->id) < 11) 2600 goto not_supported; 2601 2602 if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE) || 2603 !ata_identify_page_supported(dev, ATA_LOG_SUPPORTED_CAPABILITIES) || 2604 !ata_identify_page_supported(dev, ATA_LOG_CURRENT_SETTINGS)) 2605 goto not_supported; 2606 2607 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 2608 ATA_LOG_SUPPORTED_CAPABILITIES, 2609 dev->sector_buf, 1); 2610 if (err_mask) 2611 goto not_supported; 2612 2613 /* Check Command Duration Limit Supported bits */ 2614 val = get_unaligned_le64(&dev->sector_buf[168]); 2615 if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(0))) 2616 goto not_supported; 2617 2618 /* Warn the user if command duration guideline is not supported */ 2619 if (!(val & BIT_ULL(1))) 2620 ata_dev_warn(dev, 2621 "Command duration guideline is not supported\n"); 2622 2623 /* 2624 * We must have support for the sense data for successful NCQ commands 2625 * log indicated by the successful NCQ command sense data supported bit. 2626 */ 2627 val = get_unaligned_le64(&dev->sector_buf[8]); 2628 if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(47))) { 2629 ata_dev_warn(dev, 2630 "CDL supported but Successful NCQ Command Sense Data is not supported\n"); 2631 goto not_supported; 2632 } 2633 2634 /* Without NCQ autosense, the successful NCQ commands log is useless. */ 2635 if (!ata_id_has_ncq_autosense(dev->id)) { 2636 ata_dev_warn(dev, 2637 "CDL supported but NCQ autosense is not supported\n"); 2638 goto not_supported; 2639 } 2640 2641 /* 2642 * If CDL is marked as enabled, make sure the feature is enabled too. 2643 * Conversely, if CDL is disabled, make sure the feature is turned off. 2644 */ 2645 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 2646 ATA_LOG_CURRENT_SETTINGS, 2647 dev->sector_buf, 1); 2648 if (err_mask) 2649 goto not_supported; 2650 2651 val = get_unaligned_le64(&dev->sector_buf[8]); 2652 cdl_enabled = val & BIT_ULL(63) && val & BIT_ULL(21); 2653 if (dev->flags & ATA_DFLAG_CDL_ENABLED) { 2654 if (!cdl_enabled) { 2655 /* Enable CDL on the device */ 2656 err_mask = ata_dev_set_feature(dev, SETFEATURES_CDL, 1); 2657 if (err_mask) { 2658 ata_dev_err(dev, 2659 "Enable CDL feature failed\n"); 2660 goto not_supported; 2661 } 2662 } 2663 } else { 2664 if (cdl_enabled) { 2665 /* Disable CDL on the device */ 2666 err_mask = ata_dev_set_feature(dev, SETFEATURES_CDL, 0); 2667 if (err_mask) { 2668 ata_dev_err(dev, 2669 "Disable CDL feature failed\n"); 2670 goto not_supported; 2671 } 2672 } 2673 } 2674 2675 /* 2676 * While CDL itself has to be enabled using sysfs, CDL requires that 2677 * sense data for successful NCQ commands is enabled to work properly. 2678 * Just like ata_dev_config_sense_reporting(), enable it unconditionally 2679 * if supported. 2680 */ 2681 if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(18))) { 2682 err_mask = ata_dev_set_feature(dev, 2683 SETFEATURE_SENSE_DATA_SUCC_NCQ, 0x1); 2684 if (err_mask) { 2685 ata_dev_warn(dev, 2686 "failed to enable Sense Data for successful NCQ commands, Emask 0x%x\n", 2687 err_mask); 2688 goto not_supported; 2689 } 2690 } 2691 2692 /* CDL is supported: allocate and initialize needed resources. */ 2693 ret = ata_dev_init_cdl_resources(dev); 2694 if (ret) { 2695 ata_dev_warn(dev, "Initialize CDL resources failed\n"); 2696 goto not_supported; 2697 } 2698 2699 dev->flags |= ATA_DFLAG_CDL; 2700 2701 return; 2702 2703 not_supported: 2704 dev->flags &= ~(ATA_DFLAG_CDL | ATA_DFLAG_CDL_ENABLED); 2705 ata_dev_cleanup_cdl_resources(dev); 2706 } 2707 2708 static int ata_dev_config_lba(struct ata_device *dev) 2709 { 2710 const u16 *id = dev->id; 2711 const char *lba_desc; 2712 char ncq_desc[32]; 2713 int ret; 2714 2715 dev->flags |= ATA_DFLAG_LBA; 2716 2717 if (ata_id_has_lba48(id)) { 2718 lba_desc = "LBA48"; 2719 dev->flags |= ATA_DFLAG_LBA48; 2720 if (dev->n_sectors >= (1UL << 28) && 2721 ata_id_has_flush_ext(id)) 2722 dev->flags |= ATA_DFLAG_FLUSH_EXT; 2723 } else { 2724 lba_desc = "LBA"; 2725 } 2726 2727 /* config NCQ */ 2728 ret = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); 2729 2730 /* print device info to dmesg */ 2731 if (ata_dev_print_info(dev)) 2732 ata_dev_info(dev, 2733 "%llu sectors, multi %u: %s %s\n", 2734 (unsigned long long)dev->n_sectors, 2735 dev->multi_count, lba_desc, ncq_desc); 2736 2737 return ret; 2738 } 2739 2740 static void ata_dev_config_chs(struct ata_device *dev) 2741 { 2742 const u16 *id = dev->id; 2743 2744 if (ata_id_current_chs_valid(id)) { 2745 /* Current CHS translation is valid. */ 2746 dev->cylinders = id[54]; 2747 dev->heads = id[55]; 2748 dev->sectors = id[56]; 2749 } else { 2750 /* Default translation */ 2751 dev->cylinders = id[1]; 2752 dev->heads = id[3]; 2753 dev->sectors = id[6]; 2754 } 2755 2756 /* print device info to dmesg */ 2757 if (ata_dev_print_info(dev)) 2758 ata_dev_info(dev, 2759 "%llu sectors, multi %u, CHS %u/%u/%u\n", 2760 (unsigned long long)dev->n_sectors, 2761 dev->multi_count, dev->cylinders, 2762 dev->heads, dev->sectors); 2763 } 2764 2765 static void ata_dev_config_fua(struct ata_device *dev) 2766 { 2767 /* Ignore FUA support if its use is disabled globally */ 2768 if (!libata_fua) 2769 goto nofua; 2770 2771 /* Ignore devices without support for WRITE DMA FUA EXT */ 2772 if (!(dev->flags & ATA_DFLAG_LBA48) || !ata_id_has_fua(dev->id)) 2773 goto nofua; 2774 2775 /* Ignore known bad devices and devices that lack NCQ support */ 2776 if (!ata_ncq_supported(dev) || (dev->quirks & ATA_QUIRK_NO_FUA)) 2777 goto nofua; 2778 2779 dev->flags |= ATA_DFLAG_FUA; 2780 2781 return; 2782 2783 nofua: 2784 dev->flags &= ~ATA_DFLAG_FUA; 2785 } 2786 2787 static void ata_dev_config_devslp(struct ata_device *dev) 2788 { 2789 u8 *sata_setting = dev->sector_buf; 2790 unsigned int err_mask; 2791 int i, j; 2792 2793 /* 2794 * Check device sleep capability. Get DevSlp timing variables 2795 * from SATA Settings page of Identify Device Data Log. 2796 */ 2797 if (!ata_id_has_devslp(dev->id) || 2798 !ata_identify_page_supported(dev, ATA_LOG_SATA_SETTINGS)) 2799 return; 2800 2801 err_mask = ata_read_log_page(dev, 2802 ATA_LOG_IDENTIFY_DEVICE, 2803 ATA_LOG_SATA_SETTINGS, 2804 sata_setting, 1); 2805 if (err_mask) 2806 return; 2807 2808 dev->flags |= ATA_DFLAG_DEVSLP; 2809 for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) { 2810 j = ATA_LOG_DEVSLP_OFFSET + i; 2811 dev->devslp_timing[i] = sata_setting[j]; 2812 } 2813 } 2814 2815 static void ata_dev_config_cpr(struct ata_device *dev) 2816 { 2817 unsigned int err_mask; 2818 size_t buf_len; 2819 int i, nr_cpr = 0; 2820 struct ata_cpr_log *cpr_log = NULL; 2821 u8 *desc, *buf = NULL; 2822 2823 if (ata_id_major_version(dev->id) < 11) 2824 goto out; 2825 2826 buf_len = ata_log_supported(dev, ATA_LOG_CONCURRENT_POSITIONING_RANGES); 2827 if (buf_len == 0) 2828 goto out; 2829 2830 /* 2831 * Read the concurrent positioning ranges log (0x47). We can have at 2832 * most 255 32B range descriptors plus a 64B header. This log varies in 2833 * size, so use the size reported in the GPL directory. Reading beyond 2834 * the supported length will result in an error. 2835 */ 2836 buf_len <<= 9; 2837 buf = kzalloc(buf_len, GFP_KERNEL); 2838 if (!buf) 2839 goto out; 2840 2841 err_mask = ata_read_log_page(dev, ATA_LOG_CONCURRENT_POSITIONING_RANGES, 2842 0, buf, buf_len >> 9); 2843 if (err_mask) 2844 goto out; 2845 2846 nr_cpr = buf[0]; 2847 if (!nr_cpr) 2848 goto out; 2849 2850 /* 2851 * The device reports the number of CPR descriptors independently of the 2852 * log size, and that count is also used to emit VPD page B9h into the 2853 * fixed-size rbuf. Reject a count larger than what that buffer can hold 2854 * (ATA_DEV_MAX_CPR) or larger than the log the device actually returned. 2855 */ 2856 if (nr_cpr > ATA_DEV_MAX_CPR) { 2857 ata_dev_warn(dev, 2858 "Too many concurrent positioning ranges\n"); 2859 goto out; 2860 } 2861 2862 if (buf_len < 64 + (size_t)nr_cpr * 32) { 2863 ata_dev_warn(dev, 2864 "Invalid number of concurrent positioning ranges\n"); 2865 goto out; 2866 } 2867 2868 cpr_log = kzalloc_flex(*cpr_log, cpr, nr_cpr); 2869 if (!cpr_log) 2870 goto out; 2871 2872 cpr_log->nr_cpr = nr_cpr; 2873 desc = &buf[64]; 2874 for (i = 0; i < nr_cpr; i++, desc += 32) { 2875 cpr_log->cpr[i].num = desc[0]; 2876 cpr_log->cpr[i].num_storage_elements = desc[1]; 2877 cpr_log->cpr[i].start_lba = get_unaligned_le64(&desc[8]); 2878 cpr_log->cpr[i].num_lbas = get_unaligned_le64(&desc[16]); 2879 } 2880 2881 out: 2882 swap(dev->cpr_log, cpr_log); 2883 kfree(cpr_log); 2884 kfree(buf); 2885 } 2886 2887 /* 2888 * Configure features related to link power management. 2889 */ 2890 static void ata_dev_config_lpm(struct ata_device *dev) 2891 { 2892 struct ata_port *ap = dev->link->ap; 2893 unsigned int err_mask; 2894 2895 if (ap->flags & ATA_FLAG_NO_LPM) { 2896 /* 2897 * When the port does not support LPM, we cannot support it on 2898 * the device either. 2899 */ 2900 dev->quirks |= ATA_QUIRK_NOLPM; 2901 } else { 2902 /* 2903 * Some WD SATA-1 drives have issues with LPM, turn on NOLPM for 2904 * them. 2905 */ 2906 if ((dev->quirks & ATA_QUIRK_WD_BROKEN_LPM) && 2907 (dev->id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2) 2908 dev->quirks |= ATA_QUIRK_NOLPM; 2909 2910 /* ATI specific quirk */ 2911 if ((dev->quirks & ATA_QUIRK_NO_LPM_ON_ATI) && 2912 ata_dev_check_adapter(dev, PCI_VENDOR_ID_ATI)) 2913 dev->quirks |= ATA_QUIRK_NOLPM; 2914 } 2915 2916 if (dev->quirks & ATA_QUIRK_NOLPM && 2917 ap->target_lpm_policy != ATA_LPM_MAX_POWER) { 2918 ata_dev_warn(dev, "LPM support broken, forcing max_power\n"); 2919 ap->target_lpm_policy = ATA_LPM_MAX_POWER; 2920 } 2921 2922 /* 2923 * Device Initiated Power Management (DIPM) is normally disabled by 2924 * default on a device. However, DIPM may have been enabled and that 2925 * setting kept even after COMRESET because of the Software Settings 2926 * Preservation feature. So if the port does not support DIPM and the 2927 * device does, disable DIPM on the device. 2928 */ 2929 if (ap->flags & ATA_FLAG_NO_DIPM && ata_id_has_dipm(dev->id)) { 2930 err_mask = ata_dev_set_feature(dev, 2931 SETFEATURES_SATA_DISABLE, SATA_DIPM); 2932 if (err_mask && err_mask != AC_ERR_DEV) 2933 ata_dev_err(dev, "Disable DIPM failed, Emask 0x%x\n", 2934 err_mask); 2935 } 2936 } 2937 2938 static void ata_dev_print_features(struct ata_device *dev) 2939 { 2940 if (!(dev->flags & ATA_DFLAG_FEATURES_MASK) && !dev->cpr_log && 2941 !ata_id_has_hipm(dev->id) && !ata_id_has_dipm(dev->id)) 2942 return; 2943 2944 ata_dev_info(dev, 2945 "Features:%s%s%s%s%s%s%s%s%s%s\n", 2946 dev->flags & ATA_DFLAG_FUA ? " FUA" : "", 2947 dev->flags & ATA_DFLAG_TRUSTED ? " Trust" : "", 2948 dev->flags & ATA_DFLAG_DA ? " Dev-Attention" : "", 2949 dev->flags & ATA_DFLAG_DEVSLP ? " Dev-Sleep" : "", 2950 ata_id_has_hipm(dev->id) ? " HIPM" : "", 2951 ata_id_has_dipm(dev->id) ? " DIPM" : "", 2952 dev->flags & ATA_DFLAG_NCQ_SEND_RECV ? " NCQ-sndrcv" : "", 2953 dev->flags & ATA_DFLAG_NCQ_PRIO ? " NCQ-prio" : "", 2954 dev->flags & ATA_DFLAG_CDL ? " CDL" : "", 2955 dev->cpr_log ? " CPR" : ""); 2956 } 2957 2958 /** 2959 * ata_dev_configure - Configure the specified ATA/ATAPI device 2960 * @dev: Target device to configure 2961 * 2962 * Configure @dev according to @dev->id. Generic and low-level 2963 * driver specific fixups are also applied. 2964 * 2965 * LOCKING: 2966 * Kernel thread context (may sleep) 2967 * 2968 * RETURNS: 2969 * 0 on success, -errno otherwise 2970 */ 2971 int ata_dev_configure(struct ata_device *dev) 2972 { 2973 struct ata_port *ap = dev->link->ap; 2974 bool print_info = ata_dev_print_info(dev); 2975 const u16 *id = dev->id; 2976 unsigned int xfer_mask; 2977 unsigned int err_mask; 2978 char revbuf[7]; /* XYZ-99\0 */ 2979 char fwrevbuf[ATA_ID_FW_REV_LEN+1]; 2980 char modelbuf[ATA_ID_PROD_LEN+1]; 2981 int rc; 2982 2983 if (!ata_dev_enabled(dev)) { 2984 ata_dev_dbg(dev, "no device\n"); 2985 return 0; 2986 } 2987 2988 /* Clear the general purpose log directory cache. */ 2989 ata_clear_log_directory(dev); 2990 2991 /* Set quirks */ 2992 dev->quirks |= ata_dev_quirks(dev); 2993 ata_force_quirks(dev); 2994 2995 if (dev->quirks & ATA_QUIRK_DISABLE) { 2996 ata_dev_info(dev, "unsupported device, disabling\n"); 2997 ata_dev_disable(dev); 2998 return 0; 2999 } 3000 3001 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) && 3002 dev->class == ATA_DEV_ATAPI) { 3003 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n", 3004 atapi_enabled ? "not supported with this driver" 3005 : "disabled"); 3006 ata_dev_disable(dev); 3007 return 0; 3008 } 3009 3010 rc = ata_do_link_spd_quirk(dev); 3011 if (rc) 3012 return rc; 3013 3014 /* let ACPI work its magic */ 3015 rc = ata_acpi_on_devcfg(dev); 3016 if (rc) 3017 return rc; 3018 3019 /* massage HPA, do it early as it might change IDENTIFY data */ 3020 rc = ata_hpa_resize(dev); 3021 if (rc) 3022 return rc; 3023 3024 /* print device capabilities */ 3025 ata_dev_dbg(dev, 3026 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " 3027 "85:%04x 86:%04x 87:%04x 88:%04x\n", 3028 __func__, 3029 id[49], id[82], id[83], id[84], 3030 id[85], id[86], id[87], id[88]); 3031 3032 /* initialize to-be-configured parameters */ 3033 dev->flags &= ~ATA_DFLAG_CFG_MASK; 3034 dev->max_sectors = 0; 3035 dev->cdb_len = 0; 3036 dev->n_sectors = 0; 3037 dev->cylinders = 0; 3038 dev->heads = 0; 3039 dev->sectors = 0; 3040 dev->multi_count = 0; 3041 3042 /* 3043 * common ATA, ATAPI feature tests 3044 */ 3045 3046 /* find max transfer mode; for printk only */ 3047 xfer_mask = ata_id_xfermask(id); 3048 3049 ata_dump_id(dev, id); 3050 3051 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ 3052 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, 3053 sizeof(fwrevbuf)); 3054 3055 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, 3056 sizeof(modelbuf)); 3057 3058 /* ATA-specific feature tests */ 3059 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 3060 if (ata_id_is_cfa(id)) { 3061 /* CPRM may make this media unusable */ 3062 if (id[ATA_ID_CFA_KEY_MGMT] & 1) 3063 ata_dev_warn(dev, 3064 "supports DRM functions and may not be fully accessible\n"); 3065 snprintf(revbuf, 7, "CFA"); 3066 } else { 3067 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); 3068 /* Warn the user if the device has TPM extensions */ 3069 if (ata_id_has_tpm(id)) 3070 ata_dev_warn(dev, 3071 "supports DRM functions and may not be fully accessible\n"); 3072 } 3073 3074 dev->n_sectors = ata_id_n_sectors(id); 3075 if (ata_id_is_locked(id)) { 3076 /* 3077 * If Security locked, set capacity to zero to prevent 3078 * any I/O, e.g. partition scanning, as any I/O to a 3079 * locked drive will result in user visible errors. 3080 */ 3081 ata_dev_info(dev, 3082 "Security locked, setting capacity to zero\n"); 3083 dev->n_sectors = 0; 3084 } 3085 3086 /* get current R/W Multiple count setting */ 3087 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) { 3088 unsigned int max = dev->id[47] & 0xff; 3089 unsigned int cnt = dev->id[59] & 0xff; 3090 /* only recognize/allow powers of two here */ 3091 if (is_power_of_2(max) && is_power_of_2(cnt)) 3092 if (cnt <= max) 3093 dev->multi_count = cnt; 3094 } 3095 3096 /* print device info to dmesg */ 3097 if (print_info) 3098 ata_dev_info(dev, "%s: %s, %s, max %s\n", 3099 revbuf, modelbuf, fwrevbuf, 3100 ata_mode_string(xfer_mask)); 3101 3102 if (ata_id_has_lba(id)) { 3103 rc = ata_dev_config_lba(dev); 3104 if (rc) 3105 return rc; 3106 } else { 3107 ata_dev_config_chs(dev); 3108 } 3109 3110 ata_dev_config_lpm(dev); 3111 ata_dev_config_fua(dev); 3112 ata_dev_config_devslp(dev); 3113 ata_dev_config_sense_reporting(dev); 3114 ata_dev_config_zac(dev); 3115 ata_dev_config_trusted(dev); 3116 ata_dev_config_cpr(dev); 3117 ata_dev_config_cdl(dev); 3118 dev->cdb_len = 32; 3119 3120 if (print_info) 3121 ata_dev_print_features(dev); 3122 } 3123 3124 /* ATAPI-specific feature tests */ 3125 else if (dev->class == ATA_DEV_ATAPI) { 3126 const char *cdb_intr_string = ""; 3127 const char *atapi_an_string = ""; 3128 const char *dma_dir_string = ""; 3129 u32 sntf; 3130 3131 rc = atapi_cdb_len(id); 3132 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { 3133 ata_dev_warn(dev, "unsupported CDB len %d\n", rc); 3134 rc = -EINVAL; 3135 goto err_out_nosup; 3136 } 3137 dev->cdb_len = (unsigned int) rc; 3138 3139 /* Enable ATAPI AN if both the host and device have 3140 * the support. If PMP is attached, SNTF is required 3141 * to enable ATAPI AN to discern between PHY status 3142 * changed notifications and ATAPI ANs. 3143 */ 3144 if (atapi_an && 3145 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && 3146 (!sata_pmp_attached(ap) || 3147 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { 3148 /* issue SET feature command to turn this on */ 3149 err_mask = ata_dev_set_feature(dev, 3150 SETFEATURES_SATA_ENABLE, SATA_AN); 3151 if (err_mask) 3152 ata_dev_err(dev, 3153 "failed to enable ATAPI AN (err_mask=0x%x)\n", 3154 err_mask); 3155 else { 3156 dev->flags |= ATA_DFLAG_AN; 3157 atapi_an_string = ", ATAPI AN"; 3158 } 3159 } 3160 3161 if (ata_id_cdb_intr(dev->id)) { 3162 dev->flags |= ATA_DFLAG_CDB_INTR; 3163 cdb_intr_string = ", CDB intr"; 3164 } 3165 3166 if (atapi_dmadir || (dev->quirks & ATA_QUIRK_ATAPI_DMADIR) || 3167 atapi_id_dmadir(dev->id)) { 3168 dev->flags |= ATA_DFLAG_DMADIR; 3169 dma_dir_string = ", DMADIR"; 3170 } 3171 3172 if (ata_id_has_da(dev->id)) { 3173 dev->flags |= ATA_DFLAG_DA; 3174 zpodd_init(dev); 3175 } 3176 3177 /* print device info to dmesg */ 3178 if (print_info) 3179 ata_dev_info(dev, 3180 "ATAPI: %s, %s, max %s%s%s%s\n", 3181 modelbuf, fwrevbuf, 3182 ata_mode_string(xfer_mask), 3183 cdb_intr_string, atapi_an_string, 3184 dma_dir_string); 3185 3186 ata_dev_config_lpm(dev); 3187 3188 if (print_info) 3189 ata_dev_print_features(dev); 3190 } 3191 3192 /* determine max_sectors */ 3193 dev->max_sectors = ATA_MAX_SECTORS; 3194 if (dev->flags & ATA_DFLAG_LBA48) 3195 dev->max_sectors = ATA_MAX_SECTORS_LBA48; 3196 3197 /* Limit PATA drive on SATA cable bridge transfers to udma5, 3198 200 sectors */ 3199 if (ata_dev_knobble(dev)) { 3200 if (print_info) 3201 ata_dev_info(dev, "applying bridge limits\n"); 3202 dev->udma_mask &= ATA_UDMA5; 3203 dev->max_sectors = ATA_MAX_SECTORS; 3204 } 3205 3206 if ((dev->class == ATA_DEV_ATAPI) && 3207 (atapi_command_packet_set(id) == TYPE_TAPE)) { 3208 dev->max_sectors = ATA_MAX_SECTORS_TAPE; 3209 dev->quirks |= ATA_QUIRK_STUCK_ERR; 3210 } 3211 3212 if (dev->quirks & ATA_QUIRK_MAX_SEC) 3213 dev->max_sectors = min_t(unsigned int, dev->max_sectors, 3214 ata_dev_get_quirk_value(dev, 3215 ATA_QUIRK_MAX_SEC)); 3216 3217 if (dev->quirks & ATA_QUIRK_MAX_SEC_LBA48) 3218 dev->max_sectors = ATA_MAX_SECTORS_LBA48; 3219 3220 if (ap->ops->dev_config) 3221 ap->ops->dev_config(dev); 3222 3223 if (dev->quirks & ATA_QUIRK_DIAGNOSTIC) { 3224 /* Let the user know. We don't want to disallow opens for 3225 rescue purposes, or in case the vendor is just a blithering 3226 idiot. Do this after the dev_config call as some controllers 3227 with buggy firmware may want to avoid reporting false device 3228 bugs */ 3229 3230 if (print_info) { 3231 ata_dev_warn(dev, 3232 "Drive reports diagnostics failure. This may indicate a drive\n"); 3233 ata_dev_warn(dev, 3234 "fault or invalid emulation. Contact drive vendor for information.\n"); 3235 } 3236 } 3237 3238 if ((dev->quirks & ATA_QUIRK_FIRMWARE_WARN) && print_info) { 3239 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n"); 3240 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n"); 3241 } 3242 3243 return 0; 3244 3245 err_out_nosup: 3246 return rc; 3247 } 3248 3249 /** 3250 * ata_cable_40wire - return 40 wire cable type 3251 * @ap: port 3252 * 3253 * Helper method for drivers which want to hardwire 40 wire cable 3254 * detection. 3255 */ 3256 3257 int ata_cable_40wire(struct ata_port *ap) 3258 { 3259 return ATA_CBL_PATA40; 3260 } 3261 EXPORT_SYMBOL_GPL(ata_cable_40wire); 3262 3263 /** 3264 * ata_cable_80wire - return 80 wire cable type 3265 * @ap: port 3266 * 3267 * Helper method for drivers which want to hardwire 80 wire cable 3268 * detection. 3269 */ 3270 3271 int ata_cable_80wire(struct ata_port *ap) 3272 { 3273 return ATA_CBL_PATA80; 3274 } 3275 EXPORT_SYMBOL_GPL(ata_cable_80wire); 3276 3277 /** 3278 * ata_cable_unknown - return unknown PATA cable. 3279 * @ap: port 3280 * 3281 * Helper method for drivers which have no PATA cable detection. 3282 */ 3283 3284 int ata_cable_unknown(struct ata_port *ap) 3285 { 3286 return ATA_CBL_PATA_UNK; 3287 } 3288 EXPORT_SYMBOL_GPL(ata_cable_unknown); 3289 3290 /** 3291 * ata_cable_ignore - return ignored PATA cable. 3292 * @ap: port 3293 * 3294 * Helper method for drivers which don't use cable type to limit 3295 * transfer mode. 3296 */ 3297 int ata_cable_ignore(struct ata_port *ap) 3298 { 3299 return ATA_CBL_PATA_IGN; 3300 } 3301 EXPORT_SYMBOL_GPL(ata_cable_ignore); 3302 3303 /** 3304 * ata_cable_sata - return SATA cable type 3305 * @ap: port 3306 * 3307 * Helper method for drivers which have SATA cables 3308 */ 3309 3310 int ata_cable_sata(struct ata_port *ap) 3311 { 3312 return ATA_CBL_SATA; 3313 } 3314 EXPORT_SYMBOL_GPL(ata_cable_sata); 3315 3316 /** 3317 * sata_print_link_status - Print SATA link status 3318 * @link: SATA link to printk link status about 3319 * 3320 * This function prints link speed and status of a SATA link. 3321 * 3322 * LOCKING: 3323 * None. 3324 */ 3325 static void sata_print_link_status(struct ata_link *link) 3326 { 3327 u32 sstatus, scontrol, tmp; 3328 3329 if (sata_scr_read(link, SCR_STATUS, &sstatus)) 3330 return; 3331 if (sata_scr_read(link, SCR_CONTROL, &scontrol)) 3332 return; 3333 3334 if (ata_phys_link_online(link)) { 3335 tmp = (sstatus >> 4) & 0xf; 3336 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n", 3337 sata_spd_string(tmp), sstatus, scontrol); 3338 } else { 3339 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n", 3340 sstatus, scontrol); 3341 } 3342 } 3343 3344 /** 3345 * ata_dev_pair - return other device on cable 3346 * @adev: device 3347 * 3348 * Obtain the other device on the same cable, or if none is 3349 * present NULL is returned 3350 */ 3351 3352 struct ata_device *ata_dev_pair(struct ata_device *adev) 3353 { 3354 struct ata_link *link = adev->link; 3355 struct ata_device *pair = &link->device[1 - adev->devno]; 3356 if (!ata_dev_enabled(pair)) 3357 return NULL; 3358 return pair; 3359 } 3360 EXPORT_SYMBOL_GPL(ata_dev_pair); 3361 3362 #ifdef CONFIG_ATA_ACPI 3363 /** 3364 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration 3365 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine. 3366 * @cycle: cycle duration in ns 3367 * 3368 * Return matching xfer mode for @cycle. The returned mode is of 3369 * the transfer type specified by @xfer_shift. If @cycle is too 3370 * slow for @xfer_shift, 0xff is returned. If @cycle is faster 3371 * than the fastest known mode, the fasted mode is returned. 3372 * 3373 * LOCKING: 3374 * None. 3375 * 3376 * RETURNS: 3377 * Matching xfer_mode, 0xff if no match found. 3378 */ 3379 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle) 3380 { 3381 u8 base_mode = 0xff, last_mode = 0xff; 3382 const struct ata_xfer_ent *ent; 3383 const struct ata_timing *t; 3384 3385 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 3386 if (ent->shift == xfer_shift) 3387 base_mode = ent->base; 3388 3389 for (t = ata_timing_find_mode(base_mode); 3390 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) { 3391 unsigned short this_cycle; 3392 3393 switch (xfer_shift) { 3394 case ATA_SHIFT_PIO: 3395 case ATA_SHIFT_MWDMA: 3396 this_cycle = t->cycle; 3397 break; 3398 case ATA_SHIFT_UDMA: 3399 this_cycle = t->udma; 3400 break; 3401 default: 3402 return 0xff; 3403 } 3404 3405 if (cycle > this_cycle) 3406 break; 3407 3408 last_mode = t->mode; 3409 } 3410 3411 return last_mode; 3412 } 3413 #endif 3414 3415 /** 3416 * ata_down_xfermask_limit - adjust dev xfer masks downward 3417 * @dev: Device to adjust xfer masks 3418 * @sel: ATA_DNXFER_* selector 3419 * 3420 * Adjust xfer masks of @dev downward. Note that this function 3421 * does not apply the change. Invoking ata_set_mode() afterwards 3422 * will apply the limit. 3423 * 3424 * LOCKING: 3425 * Inherited from caller. 3426 * 3427 * RETURNS: 3428 * 0 on success, negative errno on failure 3429 */ 3430 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) 3431 { 3432 char buf[32]; 3433 unsigned int orig_mask, xfer_mask; 3434 unsigned int pio_mask, mwdma_mask, udma_mask; 3435 int quiet, highbit; 3436 3437 quiet = !!(sel & ATA_DNXFER_QUIET); 3438 sel &= ~ATA_DNXFER_QUIET; 3439 3440 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, 3441 dev->mwdma_mask, 3442 dev->udma_mask); 3443 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); 3444 3445 switch (sel) { 3446 case ATA_DNXFER_PIO: 3447 highbit = fls(pio_mask) - 1; 3448 pio_mask &= ~(1 << highbit); 3449 break; 3450 3451 case ATA_DNXFER_DMA: 3452 if (udma_mask) { 3453 highbit = fls(udma_mask) - 1; 3454 udma_mask &= ~(1 << highbit); 3455 if (!udma_mask) 3456 return -ENOENT; 3457 } else if (mwdma_mask) { 3458 highbit = fls(mwdma_mask) - 1; 3459 mwdma_mask &= ~(1 << highbit); 3460 if (!mwdma_mask) 3461 return -ENOENT; 3462 } 3463 break; 3464 3465 case ATA_DNXFER_40C: 3466 udma_mask &= ATA_UDMA_MASK_40C; 3467 break; 3468 3469 case ATA_DNXFER_FORCE_PIO0: 3470 pio_mask &= 1; 3471 fallthrough; 3472 case ATA_DNXFER_FORCE_PIO: 3473 mwdma_mask = 0; 3474 udma_mask = 0; 3475 break; 3476 3477 default: 3478 BUG(); 3479 } 3480 3481 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 3482 3483 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) 3484 return -ENOENT; 3485 3486 if (!quiet) { 3487 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) 3488 snprintf(buf, sizeof(buf), "%s:%s", 3489 ata_mode_string(xfer_mask), 3490 ata_mode_string(xfer_mask & ATA_MASK_PIO)); 3491 else 3492 snprintf(buf, sizeof(buf), "%s", 3493 ata_mode_string(xfer_mask)); 3494 3495 ata_dev_warn(dev, "limiting speed to %s\n", buf); 3496 } 3497 3498 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, 3499 &dev->udma_mask); 3500 3501 return 0; 3502 } 3503 3504 static int ata_dev_set_mode(struct ata_device *dev) 3505 { 3506 struct ata_port *ap = dev->link->ap; 3507 struct ata_eh_context *ehc = &dev->link->eh_context; 3508 const bool nosetxfer = dev->quirks & ATA_QUIRK_NOSETXFER; 3509 const char *dev_err_whine = ""; 3510 int ign_dev_err = 0; 3511 unsigned int err_mask = 0; 3512 int rc; 3513 3514 dev->flags &= ~ATA_DFLAG_PIO; 3515 if (dev->xfer_shift == ATA_SHIFT_PIO) 3516 dev->flags |= ATA_DFLAG_PIO; 3517 3518 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id)) 3519 dev_err_whine = " (SET_XFERMODE skipped)"; 3520 else { 3521 if (nosetxfer) 3522 ata_dev_warn(dev, 3523 "NOSETXFER but PATA detected - can't " 3524 "skip SETXFER, might malfunction\n"); 3525 err_mask = ata_dev_set_xfermode(dev); 3526 } 3527 3528 if (err_mask & ~AC_ERR_DEV) 3529 goto fail; 3530 3531 /* revalidate */ 3532 ehc->i.flags |= ATA_EHI_POST_SETMODE; 3533 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); 3534 ehc->i.flags &= ~ATA_EHI_POST_SETMODE; 3535 if (rc) 3536 return rc; 3537 3538 if (dev->xfer_shift == ATA_SHIFT_PIO) { 3539 /* Old CFA may refuse this command, which is just fine */ 3540 if (ata_id_is_cfa(dev->id)) 3541 ign_dev_err = 1; 3542 /* Catch several broken garbage emulations plus some pre 3543 ATA devices */ 3544 if (ata_id_major_version(dev->id) == 0 && 3545 dev->pio_mode <= XFER_PIO_2) 3546 ign_dev_err = 1; 3547 /* Some very old devices and some bad newer ones fail 3548 any kind of SET_XFERMODE request but support PIO0-2 3549 timings and no IORDY */ 3550 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2) 3551 ign_dev_err = 1; 3552 } 3553 /* Early MWDMA devices do DMA but don't allow DMA mode setting. 3554 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */ 3555 if (dev->xfer_shift == ATA_SHIFT_MWDMA && 3556 dev->dma_mode == XFER_MW_DMA_0 && 3557 (dev->id[63] >> 8) & 1) 3558 ign_dev_err = 1; 3559 3560 /* if the device is actually configured correctly, ignore dev err */ 3561 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id))) 3562 ign_dev_err = 1; 3563 3564 if (err_mask & AC_ERR_DEV) { 3565 if (!ign_dev_err) 3566 goto fail; 3567 else 3568 dev_err_whine = " (device error ignored)"; 3569 } 3570 3571 ata_dev_dbg(dev, "xfer_shift=%u, xfer_mode=0x%x\n", 3572 dev->xfer_shift, (int)dev->xfer_mode); 3573 3574 if (!(ehc->i.flags & ATA_EHI_QUIET) || 3575 ehc->i.flags & ATA_EHI_DID_HARDRESET) 3576 ata_dev_info(dev, "configured for %s%s\n", 3577 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)), 3578 dev_err_whine); 3579 3580 return 0; 3581 3582 fail: 3583 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask); 3584 return -EIO; 3585 } 3586 3587 /** 3588 * ata_set_mode - Program timings and issue SET FEATURES - XFER 3589 * @link: link on which timings will be programmed 3590 * @r_failed_dev: out parameter for failed device 3591 * 3592 * Standard implementation of the function used to tune and set 3593 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If 3594 * ata_dev_set_mode() fails, pointer to the failing device is 3595 * returned in @r_failed_dev. 3596 * 3597 * LOCKING: 3598 * PCI/etc. bus probe sem. 3599 * 3600 * RETURNS: 3601 * 0 on success, negative errno otherwise 3602 */ 3603 3604 int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) 3605 { 3606 struct ata_port *ap = link->ap; 3607 struct ata_device *dev; 3608 int rc = 0, used_dma = 0, found = 0; 3609 3610 /* step 1: calculate xfer_mask */ 3611 ata_for_each_dev(dev, link, ENABLED) { 3612 unsigned int pio_mask, dma_mask; 3613 unsigned int mode_mask; 3614 3615 mode_mask = ATA_DMA_MASK_ATA; 3616 if (dev->class == ATA_DEV_ATAPI) 3617 mode_mask = ATA_DMA_MASK_ATAPI; 3618 else if (ata_id_is_cfa(dev->id)) 3619 mode_mask = ATA_DMA_MASK_CFA; 3620 3621 ata_dev_xfermask(dev); 3622 ata_force_xfermask(dev); 3623 3624 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); 3625 3626 if (libata_dma_mask & mode_mask) 3627 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, 3628 dev->udma_mask); 3629 else 3630 dma_mask = 0; 3631 3632 dev->pio_mode = ata_xfer_mask2mode(pio_mask); 3633 dev->dma_mode = ata_xfer_mask2mode(dma_mask); 3634 3635 found = 1; 3636 if (ata_dma_enabled(dev)) 3637 used_dma = 1; 3638 } 3639 if (!found) 3640 goto out; 3641 3642 /* step 2: always set host PIO timings */ 3643 ata_for_each_dev(dev, link, ENABLED) { 3644 if (dev->pio_mode == 0xff) { 3645 ata_dev_warn(dev, "no PIO support\n"); 3646 rc = -EINVAL; 3647 goto out; 3648 } 3649 3650 dev->xfer_mode = dev->pio_mode; 3651 dev->xfer_shift = ATA_SHIFT_PIO; 3652 if (ap->ops->set_piomode) 3653 ap->ops->set_piomode(ap, dev); 3654 } 3655 3656 /* step 3: set host DMA timings */ 3657 ata_for_each_dev(dev, link, ENABLED) { 3658 if (!ata_dma_enabled(dev)) 3659 continue; 3660 3661 dev->xfer_mode = dev->dma_mode; 3662 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); 3663 if (ap->ops->set_dmamode) 3664 ap->ops->set_dmamode(ap, dev); 3665 } 3666 3667 /* step 4: update devices' xfer mode */ 3668 ata_for_each_dev(dev, link, ENABLED) { 3669 rc = ata_dev_set_mode(dev); 3670 if (rc) 3671 goto out; 3672 } 3673 3674 /* Record simplex status. If we selected DMA then the other 3675 * host channels are not permitted to do so. 3676 */ 3677 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) 3678 ap->host->simplex_claimed = ap; 3679 3680 out: 3681 if (rc) 3682 *r_failed_dev = dev; 3683 return rc; 3684 } 3685 EXPORT_SYMBOL_GPL(ata_set_mode); 3686 3687 /** 3688 * ata_wait_ready - wait for link to become ready 3689 * @link: link to be waited on 3690 * @deadline: deadline jiffies for the operation 3691 * @check_ready: callback to check link readiness 3692 * 3693 * Wait for @link to become ready. @check_ready should return 3694 * positive number if @link is ready, 0 if it isn't, -ENODEV if 3695 * link doesn't seem to be occupied, other errno for other error 3696 * conditions. 3697 * 3698 * Transient -ENODEV conditions are allowed for 3699 * ATA_TMOUT_FF_WAIT. 3700 * 3701 * LOCKING: 3702 * EH context. 3703 * 3704 * RETURNS: 3705 * 0 if @link is ready before @deadline; otherwise, -errno. 3706 */ 3707 int ata_wait_ready(struct ata_link *link, unsigned long deadline, 3708 int (*check_ready)(struct ata_link *link)) 3709 { 3710 unsigned long start = jiffies; 3711 unsigned long nodev_deadline; 3712 int warned = 0; 3713 3714 /* choose which 0xff timeout to use, read comment in libata.h */ 3715 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN) 3716 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG); 3717 else 3718 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT); 3719 3720 /* Slave readiness can't be tested separately from master. On 3721 * M/S emulation configuration, this function should be called 3722 * only on the master and it will handle both master and slave. 3723 */ 3724 WARN_ON(link == link->ap->slave_link); 3725 3726 if (time_after(nodev_deadline, deadline)) 3727 nodev_deadline = deadline; 3728 3729 while (1) { 3730 unsigned long now = jiffies; 3731 int ready, tmp; 3732 3733 ready = tmp = check_ready(link); 3734 if (ready > 0) 3735 return 0; 3736 3737 /* 3738 * -ENODEV could be transient. Ignore -ENODEV if link 3739 * is online. Also, some SATA devices take a long 3740 * time to clear 0xff after reset. Wait for 3741 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't 3742 * offline. 3743 * 3744 * Note that some PATA controllers (pata_ali) explode 3745 * if status register is read more than once when 3746 * there's no device attached. 3747 */ 3748 if (ready == -ENODEV) { 3749 if (ata_link_online(link)) 3750 ready = 0; 3751 else if ((link->ap->flags & ATA_FLAG_SATA) && 3752 !ata_link_offline(link) && 3753 time_before(now, nodev_deadline)) 3754 ready = 0; 3755 } 3756 3757 if (ready) 3758 return ready; 3759 if (time_after(now, deadline)) 3760 return -EBUSY; 3761 3762 if (!warned && time_after(now, start + 5 * HZ) && 3763 (deadline - now > 3 * HZ)) { 3764 ata_link_warn(link, 3765 "link is slow to respond, please be patient " 3766 "(ready=%d)\n", tmp); 3767 warned = 1; 3768 } 3769 3770 ata_msleep(link->ap, 50); 3771 } 3772 } 3773 3774 /** 3775 * ata_wait_after_reset - wait for link to become ready after reset 3776 * @link: link to be waited on 3777 * @deadline: deadline jiffies for the operation 3778 * @check_ready: callback to check link readiness 3779 * 3780 * Wait for @link to become ready after reset. 3781 * 3782 * LOCKING: 3783 * EH context. 3784 * 3785 * RETURNS: 3786 * 0 if @link is ready before @deadline; otherwise, -errno. 3787 */ 3788 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 3789 int (*check_ready)(struct ata_link *link)) 3790 { 3791 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET); 3792 3793 return ata_wait_ready(link, deadline, check_ready); 3794 } 3795 EXPORT_SYMBOL_GPL(ata_wait_after_reset); 3796 3797 /** 3798 * ata_std_prereset - prepare for reset 3799 * @link: ATA link to be reset 3800 * @deadline: deadline jiffies for the operation 3801 * 3802 * @link is about to be reset. Initialize it. Failure from 3803 * prereset makes libata abort whole reset sequence and give up 3804 * that port, so prereset should be best-effort. It does its 3805 * best to prepare for reset sequence but if things go wrong, it 3806 * should just whine, not fail. 3807 * 3808 * LOCKING: 3809 * Kernel thread context (may sleep) 3810 * 3811 * RETURNS: 3812 * Always 0. 3813 */ 3814 int ata_std_prereset(struct ata_link *link, unsigned long deadline) 3815 { 3816 struct ata_port *ap = link->ap; 3817 struct ata_eh_context *ehc = &link->eh_context; 3818 const unsigned int *timing = sata_ehc_deb_timing(ehc); 3819 int rc; 3820 3821 /* if we're about to do hardreset, nothing more to do */ 3822 if (ehc->i.action & ATA_EH_HARDRESET) 3823 return 0; 3824 3825 /* if SATA, resume link */ 3826 if (ap->flags & ATA_FLAG_SATA) { 3827 rc = sata_link_resume(link, timing, deadline); 3828 /* whine about phy resume failure but proceed */ 3829 if (rc && rc != -EOPNOTSUPP) 3830 ata_link_warn(link, 3831 "failed to resume link for reset (errno=%d)\n", 3832 rc); 3833 } 3834 3835 /* no point in trying softreset on offline link */ 3836 if (ata_phys_link_offline(link)) 3837 ehc->i.action &= ~ATA_EH_SOFTRESET; 3838 3839 return 0; 3840 } 3841 EXPORT_SYMBOL_GPL(ata_std_prereset); 3842 3843 /** 3844 * ata_std_postreset - standard postreset callback 3845 * @link: the target ata_link 3846 * @classes: classes of attached devices 3847 * 3848 * This function is invoked after a successful reset. Note that 3849 * the device might have been reset more than once using 3850 * different reset methods before postreset is invoked. 3851 * 3852 * LOCKING: 3853 * Kernel thread context (may sleep) 3854 */ 3855 void ata_std_postreset(struct ata_link *link, unsigned int *classes) 3856 { 3857 u32 serror; 3858 3859 /* reset complete, clear SError */ 3860 if (!sata_scr_read(link, SCR_ERROR, &serror)) 3861 sata_scr_write(link, SCR_ERROR, serror); 3862 3863 /* print link status */ 3864 sata_print_link_status(link); 3865 } 3866 EXPORT_SYMBOL_GPL(ata_std_postreset); 3867 3868 /** 3869 * ata_dev_same_device - Determine whether new ID matches configured device 3870 * @dev: device to compare against 3871 * @new_class: class of the new device 3872 * @new_id: IDENTIFY page of the new device 3873 * 3874 * Compare @new_class and @new_id against @dev and determine 3875 * whether @dev is the device indicated by @new_class and 3876 * @new_id. 3877 * 3878 * LOCKING: 3879 * None. 3880 * 3881 * RETURNS: 3882 * 1 if @dev matches @new_class and @new_id, 0 otherwise. 3883 */ 3884 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, 3885 const u16 *new_id) 3886 { 3887 const u16 *old_id = dev->id; 3888 unsigned char model[2][ATA_ID_PROD_LEN + 1]; 3889 unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; 3890 3891 if (dev->class != new_class) { 3892 ata_dev_info(dev, "class mismatch %d != %d\n", 3893 dev->class, new_class); 3894 return 0; 3895 } 3896 3897 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); 3898 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); 3899 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); 3900 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); 3901 3902 if (strcmp(model[0], model[1])) { 3903 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n", 3904 model[0], model[1]); 3905 return 0; 3906 } 3907 3908 if (strcmp(serial[0], serial[1])) { 3909 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n", 3910 serial[0], serial[1]); 3911 return 0; 3912 } 3913 3914 return 1; 3915 } 3916 3917 /** 3918 * ata_dev_reread_id - Re-read IDENTIFY data 3919 * @dev: target ATA device 3920 * @readid_flags: read ID flags 3921 * 3922 * Re-read IDENTIFY page and make sure @dev is still attached to 3923 * the port. 3924 * 3925 * LOCKING: 3926 * Kernel thread context (may sleep) 3927 * 3928 * RETURNS: 3929 * 0 on success, negative errno otherwise 3930 */ 3931 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) 3932 { 3933 unsigned int class = dev->class; 3934 u16 *id = (void *)dev->sector_buf; 3935 int rc; 3936 3937 /* read ID data */ 3938 rc = ata_dev_read_id(dev, &class, readid_flags, id); 3939 if (rc) 3940 return rc; 3941 3942 /* is the device still there? */ 3943 if (!ata_dev_same_device(dev, class, id)) 3944 return -ENODEV; 3945 3946 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); 3947 return 0; 3948 } 3949 3950 /** 3951 * ata_dev_revalidate - Revalidate ATA device 3952 * @dev: device to revalidate 3953 * @new_class: new class code 3954 * @readid_flags: read ID flags 3955 * 3956 * Re-read IDENTIFY page, make sure @dev is still attached to the 3957 * port and reconfigure it according to the new IDENTIFY page. 3958 * 3959 * LOCKING: 3960 * Kernel thread context (may sleep) 3961 * 3962 * RETURNS: 3963 * 0 on success, negative errno otherwise 3964 */ 3965 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, 3966 unsigned int readid_flags) 3967 { 3968 u64 n_sectors = dev->n_sectors; 3969 u64 n_native_sectors = dev->n_native_sectors; 3970 int rc; 3971 3972 if (!ata_dev_enabled(dev)) 3973 return -ENODEV; 3974 3975 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ 3976 if (ata_class_enabled(new_class) && new_class == ATA_DEV_PMP) { 3977 ata_dev_info(dev, "class mismatch %u != %u\n", 3978 dev->class, new_class); 3979 rc = -ENODEV; 3980 goto fail; 3981 } 3982 3983 /* re-read ID */ 3984 rc = ata_dev_reread_id(dev, readid_flags); 3985 if (rc) 3986 goto fail; 3987 3988 /* configure device according to the new ID */ 3989 rc = ata_dev_configure(dev); 3990 if (rc) 3991 goto fail; 3992 3993 /* verify n_sectors hasn't changed */ 3994 if (dev->class != ATA_DEV_ATA || !n_sectors || 3995 dev->n_sectors == n_sectors) 3996 return 0; 3997 3998 /* n_sectors has changed */ 3999 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n", 4000 (unsigned long long)n_sectors, 4001 (unsigned long long)dev->n_sectors); 4002 4003 /* 4004 * Something could have caused HPA to be unlocked 4005 * involuntarily. If n_native_sectors hasn't changed and the 4006 * new size matches it, keep the device. 4007 */ 4008 if (dev->n_native_sectors == n_native_sectors && 4009 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) { 4010 ata_dev_warn(dev, 4011 "new n_sectors matches native, probably " 4012 "late HPA unlock, n_sectors updated\n"); 4013 /* use the larger n_sectors */ 4014 return 0; 4015 } 4016 4017 /* 4018 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try 4019 * unlocking HPA in those cases. 4020 * 4021 * https://bugzilla.kernel.org/show_bug.cgi?id=15396 4022 */ 4023 if (dev->n_native_sectors == n_native_sectors && 4024 dev->n_sectors < n_sectors && n_sectors == n_native_sectors && 4025 !(dev->quirks & ATA_QUIRK_BROKEN_HPA)) { 4026 ata_dev_warn(dev, 4027 "old n_sectors matches native, probably " 4028 "late HPA lock, will try to unlock HPA\n"); 4029 /* try unlocking HPA */ 4030 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 4031 rc = -EIO; 4032 } else 4033 rc = -ENODEV; 4034 4035 /* restore original n_[native_]sectors and fail */ 4036 dev->n_native_sectors = n_native_sectors; 4037 dev->n_sectors = n_sectors; 4038 fail: 4039 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc); 4040 return rc; 4041 } 4042 4043 static const char * const ata_quirk_names[] = { 4044 [__ATA_QUIRK_DIAGNOSTIC] = "diagnostic", 4045 [__ATA_QUIRK_NODMA] = "nodma", 4046 [__ATA_QUIRK_NONCQ] = "noncq", 4047 [__ATA_QUIRK_BROKEN_HPA] = "brokenhpa", 4048 [__ATA_QUIRK_DISABLE] = "disable", 4049 [__ATA_QUIRK_HPA_SIZE] = "hpasize", 4050 [__ATA_QUIRK_IVB] = "ivb", 4051 [__ATA_QUIRK_STUCK_ERR] = "stuckerr", 4052 [__ATA_QUIRK_BRIDGE_OK] = "bridgeok", 4053 [__ATA_QUIRK_ATAPI_MOD16_DMA] = "atapimod16dma", 4054 [__ATA_QUIRK_FIRMWARE_WARN] = "firmwarewarn", 4055 [__ATA_QUIRK_1_5_GBPS] = "1.5gbps", 4056 [__ATA_QUIRK_NOSETXFER] = "nosetxfer", 4057 [__ATA_QUIRK_BROKEN_FPDMA_AA] = "brokenfpdmaaa", 4058 [__ATA_QUIRK_DUMP_ID] = "dumpid", 4059 [__ATA_QUIRK_MAX_SEC_LBA48] = "maxseclba48", 4060 [__ATA_QUIRK_ATAPI_DMADIR] = "atapidmadir", 4061 [__ATA_QUIRK_NO_NCQ_TRIM] = "noncqtrim", 4062 [__ATA_QUIRK_NOLPM] = "nolpm", 4063 [__ATA_QUIRK_WD_BROKEN_LPM] = "wdbrokenlpm", 4064 [__ATA_QUIRK_ZERO_AFTER_TRIM] = "zeroaftertrim", 4065 [__ATA_QUIRK_NO_DMA_LOG] = "nodmalog", 4066 [__ATA_QUIRK_NOTRIM] = "notrim", 4067 [__ATA_QUIRK_MAX_SEC] = "maxsec", 4068 [__ATA_QUIRK_MAX_TRIM_128M] = "maxtrim128m", 4069 [__ATA_QUIRK_NO_NCQ_ON_ATI] = "noncqonati", 4070 [__ATA_QUIRK_NO_LPM_ON_ATI] = "nolpmonati", 4071 [__ATA_QUIRK_NO_ID_DEV_LOG] = "noiddevlog", 4072 [__ATA_QUIRK_NO_LOG_DIR] = "nologdir", 4073 [__ATA_QUIRK_NO_FUA] = "nofua", 4074 }; 4075 4076 static void ata_dev_print_quirks(const struct ata_device *dev, 4077 const char *model, const char *rev, 4078 unsigned int quirks) 4079 { 4080 struct ata_eh_context *ehc = &dev->link->eh_context; 4081 int n = 0, i; 4082 size_t sz; 4083 char *str; 4084 4085 if (!ata_dev_print_info(dev) || ehc->i.flags & ATA_EHI_DID_PRINT_QUIRKS) 4086 return; 4087 4088 ehc->i.flags |= ATA_EHI_DID_PRINT_QUIRKS; 4089 4090 if (!quirks) 4091 return; 4092 4093 sz = 64 + ARRAY_SIZE(ata_quirk_names) * 16; 4094 str = kmalloc(sz, GFP_KERNEL); 4095 if (!str) 4096 return; 4097 4098 n = snprintf(str, sz, "Model '%s', rev '%s', applying quirks:", 4099 model, rev); 4100 4101 for (i = 0; i < ARRAY_SIZE(ata_quirk_names); i++) { 4102 if (quirks & (1U << i)) 4103 n += snprintf(str + n, sz - n, 4104 " %s", ata_quirk_names[i]); 4105 } 4106 4107 ata_dev_warn(dev, "%s\n", str); 4108 4109 kfree(str); 4110 } 4111 4112 struct ata_dev_quirk_value { 4113 const char *model_num; 4114 const char *model_rev; 4115 u64 val; 4116 }; 4117 4118 static const struct ata_dev_quirk_value __ata_dev_max_sec_quirks[] = { 4119 { "TORiSAN DVD-ROM DRD-N216", NULL, 128 }, 4120 { "ST380013AS", "3.20", 1024 }, 4121 { "LITEON CX1-JB*-HP", NULL, 1024 }, 4122 { "LITEON EP1-*", NULL, 1024 }, 4123 { "DELLBOSS VD", "MV.R00-0", 8191 }, 4124 { "INTEL SSDSC2KG480G8", "XCV10120", 8191 }, 4125 { }, 4126 }; 4127 4128 struct ata_dev_quirks_entry { 4129 const char *model_num; 4130 const char *model_rev; 4131 u64 quirks; 4132 }; 4133 4134 static const struct ata_dev_quirks_entry __ata_dev_quirks[] = { 4135 /* Devices with DMA related problems under Linux */ 4136 { "WDC AC11000H", NULL, ATA_QUIRK_NODMA }, 4137 { "WDC AC22100H", NULL, ATA_QUIRK_NODMA }, 4138 { "WDC AC32500H", NULL, ATA_QUIRK_NODMA }, 4139 { "WDC AC33100H", NULL, ATA_QUIRK_NODMA }, 4140 { "WDC AC31600H", NULL, ATA_QUIRK_NODMA }, 4141 { "WDC AC32100H", "24.09P07", ATA_QUIRK_NODMA }, 4142 { "WDC AC23200L", "21.10N21", ATA_QUIRK_NODMA }, 4143 { "Compaq CRD-8241B", NULL, ATA_QUIRK_NODMA }, 4144 { "CRD-8400B", NULL, ATA_QUIRK_NODMA }, 4145 { "CRD-848[02]B", NULL, ATA_QUIRK_NODMA }, 4146 { "CRD-84", NULL, ATA_QUIRK_NODMA }, 4147 { "SanDisk SDP3B", NULL, ATA_QUIRK_NODMA }, 4148 { "SanDisk SDP3B-64", NULL, ATA_QUIRK_NODMA }, 4149 { "SANYO CD-ROM CRD", NULL, ATA_QUIRK_NODMA }, 4150 { "HITACHI CDR-8", NULL, ATA_QUIRK_NODMA }, 4151 { "HITACHI CDR-8[34]35", NULL, ATA_QUIRK_NODMA }, 4152 { "Toshiba CD-ROM XM-6202B", NULL, ATA_QUIRK_NODMA }, 4153 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_QUIRK_NODMA }, 4154 { "CD-532E-A", NULL, ATA_QUIRK_NODMA }, 4155 { "E-IDE CD-ROM CR-840", NULL, ATA_QUIRK_NODMA }, 4156 { "CD-ROM Drive/F5A", NULL, ATA_QUIRK_NODMA }, 4157 { "WPI CDD-820", NULL, ATA_QUIRK_NODMA }, 4158 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_QUIRK_NODMA }, 4159 { "SAMSUNG CD-ROM SC", NULL, ATA_QUIRK_NODMA }, 4160 { "ATAPI CD-ROM DRIVE 40X MAXIMUM", NULL, ATA_QUIRK_NODMA }, 4161 { "_NEC DV5800A", NULL, ATA_QUIRK_NODMA }, 4162 { "SAMSUNG CD-ROM SN-124", "N001", ATA_QUIRK_NODMA }, 4163 { "Seagate STT20000A", NULL, ATA_QUIRK_NODMA }, 4164 { " 2GB ATA Flash Disk", "ADMA428M", ATA_QUIRK_NODMA }, 4165 { "VRFDFC22048UCHC-TE*", NULL, ATA_QUIRK_NODMA }, 4166 /* Odd clown on sil3726/4726 PMPs */ 4167 { "Config Disk", NULL, ATA_QUIRK_DISABLE }, 4168 /* Similar story with ASMedia 1092 */ 4169 { "ASMT109x- Config", NULL, ATA_QUIRK_DISABLE }, 4170 4171 /* Weird ATAPI devices */ 4172 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_QUIRK_MAX_SEC }, 4173 { "QUANTUM DAT DAT72-000", NULL, ATA_QUIRK_ATAPI_MOD16_DMA }, 4174 { "Slimtype DVD A DS8A8SH", NULL, ATA_QUIRK_MAX_SEC_LBA48 }, 4175 { "Slimtype DVD A DS8A9SH", NULL, ATA_QUIRK_MAX_SEC_LBA48 }, 4176 4177 /* 4178 * Causes silent data corruption with higher max sects. 4179 * http://lkml.kernel.org/g/x49wpy40ysk.fsf@segfault.boston.devel.redhat.com 4180 */ 4181 { "ST380013AS", "3.20", ATA_QUIRK_MAX_SEC }, 4182 4183 /* 4184 * These devices time out with higher max sects. 4185 * https://bugzilla.kernel.org/show_bug.cgi?id=121671 4186 */ 4187 { "LITEON CX1-JB*-HP", NULL, ATA_QUIRK_MAX_SEC }, 4188 { "LITEON EP1-*", NULL, ATA_QUIRK_MAX_SEC }, 4189 4190 /* 4191 * These devices time out with higher max sects. 4192 * https://bugzilla.kernel.org/show_bug.cgi?id=220693 4193 */ 4194 { "DELLBOSS VD", "MV.R00-0", ATA_QUIRK_MAX_SEC }, 4195 4196 /* Devices we expect to fail diagnostics */ 4197 4198 /* Devices where NCQ should be avoided */ 4199 /* NCQ is slow */ 4200 { "WDC WD740ADFD-00", NULL, ATA_QUIRK_NONCQ }, 4201 { "WDC WD740ADFD-00NLR1", NULL, ATA_QUIRK_NONCQ }, 4202 /* http://thread.gmane.org/gmane.linux.ide/14907 */ 4203 { "FUJITSU MHT2060BH", NULL, ATA_QUIRK_NONCQ }, 4204 /* NCQ is broken */ 4205 { "Maxtor *", "BANC*", ATA_QUIRK_NONCQ }, 4206 { "Maxtor 7V300F0", "VA111630", ATA_QUIRK_NONCQ }, 4207 { "ST380817AS", "3.42", ATA_QUIRK_NONCQ }, 4208 { "ST3160023AS", "3.42", ATA_QUIRK_NONCQ }, 4209 { "OCZ CORE_SSD", "02.10104", ATA_QUIRK_NONCQ }, 4210 4211 /* Seagate NCQ + FLUSH CACHE firmware bug */ 4212 { "ST31500341AS", "SD1[5-9]", ATA_QUIRK_NONCQ | 4213 ATA_QUIRK_FIRMWARE_WARN }, 4214 4215 { "ST31000333AS", "SD1[5-9]", ATA_QUIRK_NONCQ | 4216 ATA_QUIRK_FIRMWARE_WARN }, 4217 4218 { "ST3640[36]23AS", "SD1[5-9]", ATA_QUIRK_NONCQ | 4219 ATA_QUIRK_FIRMWARE_WARN }, 4220 4221 { "ST3320[68]13AS", "SD1[5-9]", ATA_QUIRK_NONCQ | 4222 ATA_QUIRK_FIRMWARE_WARN }, 4223 4224 /* ADATA devices with LPM issues. */ 4225 { "ADATA SU680", NULL, ATA_QUIRK_NOLPM }, 4226 4227 /* Seagate disks with LPM issues */ 4228 { "ST1000DM010-2EP102", NULL, ATA_QUIRK_NOLPM }, 4229 { "ST2000DM008-2FR102", NULL, ATA_QUIRK_NOLPM }, 4230 4231 /* drives which fail FPDMA_AA activation (some may freeze afterwards) 4232 the ST disks also have LPM issues */ 4233 { "ST1000LM024 HN-M101MBB", NULL, ATA_QUIRK_BROKEN_FPDMA_AA | 4234 ATA_QUIRK_NOLPM }, 4235 { "VB0250EAVER", "HPG7", ATA_QUIRK_BROKEN_FPDMA_AA }, 4236 4237 /* Blacklist entries taken from Silicon Image 3124/3132 4238 Windows driver .inf file - also several Linux problem reports */ 4239 { "HTS541060G9SA00", "MB3OC60D", ATA_QUIRK_NONCQ }, 4240 { "HTS541080G9SA00", "MB4OC60D", ATA_QUIRK_NONCQ }, 4241 { "HTS541010G9SA00", "MBZOC60D", ATA_QUIRK_NONCQ }, 4242 4243 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */ 4244 { "C300-CTFDDAC128MAG", "0001", ATA_QUIRK_NONCQ }, 4245 4246 /* Sandisk SD7/8/9s lock up hard on large trims */ 4247 { "SanDisk SD[789]*", NULL, ATA_QUIRK_MAX_TRIM_128M }, 4248 4249 /* devices which puke on READ_NATIVE_MAX */ 4250 { "HDS724040KLSA80", "KFAOA20N", ATA_QUIRK_BROKEN_HPA }, 4251 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_QUIRK_BROKEN_HPA }, 4252 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_QUIRK_BROKEN_HPA }, 4253 { "MAXTOR 6L080L4", "A93.0500", ATA_QUIRK_BROKEN_HPA }, 4254 4255 /* this one allows HPA unlocking but fails IOs on the area */ 4256 { "OCZ-VERTEX", "1.30", ATA_QUIRK_BROKEN_HPA }, 4257 4258 /* Devices which report 1 sector over size HPA */ 4259 { "ST340823A", NULL, ATA_QUIRK_HPA_SIZE }, 4260 { "ST320413A", NULL, ATA_QUIRK_HPA_SIZE }, 4261 { "ST310211A", NULL, ATA_QUIRK_HPA_SIZE }, 4262 4263 /* Devices which get the IVB wrong */ 4264 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_QUIRK_IVB }, 4265 /* Maybe we should just add all TSSTcorp devices... */ 4266 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_QUIRK_IVB }, 4267 4268 /* Devices that do not need bridging limits applied */ 4269 { "MTRON MSP-SATA*", NULL, ATA_QUIRK_BRIDGE_OK }, 4270 { "BUFFALO HD-QSU2/R5", NULL, ATA_QUIRK_BRIDGE_OK }, 4271 { "QEMU HARDDISK", "2.5+", ATA_QUIRK_BRIDGE_OK }, 4272 4273 /* Devices which aren't very happy with higher link speeds */ 4274 { "WD My Book", NULL, ATA_QUIRK_1_5_GBPS }, 4275 { "Seagate FreeAgent GoFlex", NULL, ATA_QUIRK_1_5_GBPS }, 4276 4277 /* 4278 * Devices which choke on SETXFER. Applies only if both the 4279 * device and controller are SATA. 4280 */ 4281 { "PIONEER DVD-RW DVRTD08", NULL, ATA_QUIRK_NOSETXFER }, 4282 { "PIONEER DVD-RW DVRTD08A", NULL, ATA_QUIRK_NOSETXFER }, 4283 { "PIONEER DVD-RW DVR-215", NULL, ATA_QUIRK_NOSETXFER }, 4284 { "PIONEER DVD-RW DVR-212D", NULL, ATA_QUIRK_NOSETXFER }, 4285 { "PIONEER DVD-RW DVR-216D", NULL, ATA_QUIRK_NOSETXFER }, 4286 4287 /* These specific Pioneer models have LPM issues */ 4288 { "PIONEER BD-RW BDR-207M", NULL, ATA_QUIRK_NOLPM }, 4289 { "PIONEER BD-RW BDR-205", NULL, ATA_QUIRK_NOLPM }, 4290 4291 /* Crucial devices with broken LPM support */ 4292 { "CT*0BX*00SSD1", NULL, ATA_QUIRK_NOLPM }, 4293 4294 /* 512GB MX100 with MU01 firmware has both queued TRIM and LPM issues */ 4295 { "Crucial_CT512MX100*", "MU01", ATA_QUIRK_NO_NCQ_TRIM | 4296 ATA_QUIRK_ZERO_AFTER_TRIM | 4297 ATA_QUIRK_NOLPM }, 4298 /* 512GB MX100 with newer firmware has only LPM issues */ 4299 { "Crucial_CT512MX100*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM | 4300 ATA_QUIRK_NOLPM }, 4301 4302 /* 480GB+ M500 SSDs have both queued TRIM and LPM issues */ 4303 { "Crucial_CT480M500*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4304 ATA_QUIRK_ZERO_AFTER_TRIM | 4305 ATA_QUIRK_NOLPM }, 4306 { "Crucial_CT960M500*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4307 ATA_QUIRK_ZERO_AFTER_TRIM | 4308 ATA_QUIRK_NOLPM }, 4309 4310 /* AMD Radeon devices with broken LPM support */ 4311 { "R3SL240G", NULL, ATA_QUIRK_NOLPM }, 4312 4313 /* Apacer models with LPM issues */ 4314 { "Apacer AS340*", NULL, ATA_QUIRK_NOLPM }, 4315 4316 /* PNY CS900 (Phison PS3111-S11, DRAM-less) drops the link on DIPM */ 4317 { "PNY CS900 1TB SSD", NULL, ATA_QUIRK_NOLPM }, 4318 4319 /* Silicon Motion models with LPM issues */ 4320 { "MD619HXCLDE3TC", "TCVAID", ATA_QUIRK_NOLPM }, 4321 { "MD619GXCLDE3TC", "TCV35D", ATA_QUIRK_NOLPM }, 4322 4323 /* These specific Samsung models/firmware-revs do not handle LPM well */ 4324 { "SAMSUNG MZMPC128HBFU-000MV", "CXM14M1Q", ATA_QUIRK_NOLPM }, 4325 { "SAMSUNG SSD PM830 mSATA *", "CXM13D1Q", ATA_QUIRK_NOLPM }, 4326 { "SAMSUNG MZ7TD256HAFV-000L9", NULL, ATA_QUIRK_NOLPM }, 4327 { "SAMSUNG MZ7TE512HMHP-000L1", "EXT06L0Q", ATA_QUIRK_NOLPM }, 4328 4329 /* devices that don't properly handle queued TRIM commands */ 4330 { "Micron_M500IT_*", "MU01", ATA_QUIRK_NO_NCQ_TRIM | 4331 ATA_QUIRK_ZERO_AFTER_TRIM }, 4332 { "Micron_M500_*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4333 ATA_QUIRK_ZERO_AFTER_TRIM }, 4334 { "Micron_M5[15]0_*", "MU01", ATA_QUIRK_NO_NCQ_TRIM | 4335 ATA_QUIRK_ZERO_AFTER_TRIM }, 4336 { "Micron_1100_*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4337 ATA_QUIRK_ZERO_AFTER_TRIM, }, 4338 { "Crucial_CT*M500*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4339 ATA_QUIRK_ZERO_AFTER_TRIM }, 4340 { "Crucial_CT*M550*", "MU01", ATA_QUIRK_NO_NCQ_TRIM | 4341 ATA_QUIRK_ZERO_AFTER_TRIM }, 4342 { "Crucial_CT*MX100*", "MU01", ATA_QUIRK_NO_NCQ_TRIM | 4343 ATA_QUIRK_ZERO_AFTER_TRIM }, 4344 { "Samsung SSD 840 EVO*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4345 ATA_QUIRK_NO_DMA_LOG | 4346 ATA_QUIRK_ZERO_AFTER_TRIM }, 4347 { "Samsung SSD 840*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4348 ATA_QUIRK_ZERO_AFTER_TRIM }, 4349 { "Samsung SSD 850*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4350 ATA_QUIRK_ZERO_AFTER_TRIM }, 4351 { "Samsung SSD 860*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4352 ATA_QUIRK_ZERO_AFTER_TRIM | 4353 ATA_QUIRK_NO_NCQ_ON_ATI | 4354 ATA_QUIRK_NO_LPM_ON_ATI }, 4355 { "Samsung SSD 870*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4356 ATA_QUIRK_ZERO_AFTER_TRIM | 4357 ATA_QUIRK_NO_NCQ_ON_ATI | 4358 ATA_QUIRK_NO_LPM_ON_ATI }, 4359 { "SAMSUNG*MZ7LH*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4360 ATA_QUIRK_ZERO_AFTER_TRIM | 4361 ATA_QUIRK_NO_NCQ_ON_ATI | 4362 ATA_QUIRK_NO_LPM_ON_ATI }, 4363 { "FCCT*M500*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4364 ATA_QUIRK_ZERO_AFTER_TRIM }, 4365 4366 /* devices that don't properly handle TRIM commands */ 4367 { "SuperSSpeed S238*", NULL, ATA_QUIRK_NOTRIM }, 4368 { "M88V29*", NULL, ATA_QUIRK_NOTRIM }, 4369 4370 /* 4371 * As defined, the DRAT (Deterministic Read After Trim) and RZAT 4372 * (Return Zero After Trim) flags in the ATA Command Set are 4373 * unreliable in the sense that they only define what happens if 4374 * the device successfully executed the DSM TRIM command. TRIM 4375 * is only advisory, however, and the device is free to silently 4376 * ignore all or parts of the request. 4377 * 4378 * Whitelist drives that are known to reliably return zeroes 4379 * after TRIM. 4380 */ 4381 4382 /* 4383 * The intel 510 drive has buggy DRAT/RZAT. Explicitly exclude 4384 * that model before whitelisting all other intel SSDs. 4385 */ 4386 { "INTEL*SSDSC2MH*", NULL, 0 }, 4387 4388 { "Micron*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4389 { "Crucial*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4390 { "INTEL SSDSC2KG480G8", "XCV10120", ATA_QUIRK_ZERO_AFTER_TRIM | 4391 ATA_QUIRK_MAX_SEC }, 4392 { "INTEL*SSD*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4393 { "SSD*INTEL*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4394 { "Samsung*SSD*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4395 { "SAMSUNG*SSD*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4396 { "SAMSUNG*MZ7KM*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4397 { "ST[1248][0248]0[FH]*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4398 4399 /* 4400 * Some WD SATA-I drives spin up and down erratically when the link 4401 * is put into the slumber mode. We don't have full list of the 4402 * affected devices. Disable LPM if the device matches one of the 4403 * known prefixes and is SATA-1. As a side effect LPM partial is 4404 * lost too. 4405 * 4406 * https://bugzilla.kernel.org/show_bug.cgi?id=57211 4407 */ 4408 { "WDC WD800JD-*", NULL, ATA_QUIRK_WD_BROKEN_LPM }, 4409 { "WDC WD1200JD-*", NULL, ATA_QUIRK_WD_BROKEN_LPM }, 4410 { "WDC WD1600JD-*", NULL, ATA_QUIRK_WD_BROKEN_LPM }, 4411 { "WDC WD2000JD-*", NULL, ATA_QUIRK_WD_BROKEN_LPM }, 4412 { "WDC WD2500JD-*", NULL, ATA_QUIRK_WD_BROKEN_LPM }, 4413 { "WDC WD3000JD-*", NULL, ATA_QUIRK_WD_BROKEN_LPM }, 4414 { "WDC WD3200JD-*", NULL, ATA_QUIRK_WD_BROKEN_LPM }, 4415 4416 /* 4417 * This sata dom device goes on a walkabout when the ATA_LOG_DIRECTORY 4418 * log page is accessed. Ensure we never ask for this log page with 4419 * these devices. 4420 */ 4421 { "SATADOM-ML 3ME", NULL, ATA_QUIRK_NO_LOG_DIR }, 4422 4423 /* Buggy FUA */ 4424 { "Maxtor", "BANC1G10", ATA_QUIRK_NO_FUA }, 4425 { "WDC*WD2500J*", NULL, ATA_QUIRK_NO_FUA }, 4426 { "OCZ-VERTEX*", NULL, ATA_QUIRK_NO_FUA }, 4427 { "INTEL*SSDSC2CT*", NULL, ATA_QUIRK_NO_FUA }, 4428 4429 /* End Marker */ 4430 { } 4431 }; 4432 4433 static u64 ata_dev_quirks(const struct ata_device *dev) 4434 { 4435 unsigned char model_num[ATA_ID_PROD_LEN + 1]; 4436 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; 4437 const struct ata_dev_quirks_entry *ad = __ata_dev_quirks; 4438 4439 /* dev->quirks is an u64. */ 4440 BUILD_BUG_ON(__ATA_QUIRK_MAX > 64); 4441 4442 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 4443 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); 4444 4445 while (ad->model_num) { 4446 if (glob_match(ad->model_num, model_num) && 4447 (!ad->model_rev || glob_match(ad->model_rev, model_rev))) { 4448 ata_dev_print_quirks(dev, model_num, model_rev, 4449 ad->quirks); 4450 return ad->quirks; 4451 } 4452 ad++; 4453 } 4454 return 0; 4455 } 4456 4457 static u64 ata_dev_get_max_sec_quirk_value(struct ata_device *dev) 4458 { 4459 unsigned char model_num[ATA_ID_PROD_LEN + 1]; 4460 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; 4461 const struct ata_dev_quirk_value *ad = __ata_dev_max_sec_quirks; 4462 u64 val = 0; 4463 4464 #ifdef CONFIG_ATA_FORCE 4465 const struct ata_force_ent *fe = ata_force_get_fe_for_dev(dev); 4466 if (fe && (fe->param.quirk_on & ATA_QUIRK_MAX_SEC) && fe->param.value) 4467 val = fe->param.value; 4468 #endif 4469 if (val) 4470 goto out; 4471 4472 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 4473 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); 4474 4475 while (ad->model_num) { 4476 if (glob_match(ad->model_num, model_num) && 4477 (!ad->model_rev || glob_match(ad->model_rev, model_rev))) { 4478 val = ad->val; 4479 break; 4480 } 4481 ad++; 4482 } 4483 4484 out: 4485 ata_dev_warn(dev, "%s quirk is using value: %llu\n", 4486 ata_quirk_names[__ATA_QUIRK_MAX_SEC], val); 4487 4488 return val; 4489 } 4490 4491 static u64 ata_dev_get_quirk_value(struct ata_device *dev, u64 quirk) 4492 { 4493 if (quirk == ATA_QUIRK_MAX_SEC) 4494 return ata_dev_get_max_sec_quirk_value(dev); 4495 4496 return 0; 4497 } 4498 4499 static bool ata_dev_nodma(const struct ata_device *dev) 4500 { 4501 /* 4502 * We do not support polling DMA. Deny DMA for those ATAPI devices 4503 * with CDB-intr (and use PIO) if the LLDD handles only interrupts in 4504 * the HSM_ST_LAST state. 4505 */ 4506 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && 4507 (dev->flags & ATA_DFLAG_CDB_INTR)) 4508 return true; 4509 return dev->quirks & ATA_QUIRK_NODMA; 4510 } 4511 4512 /** 4513 * ata_is_40wire - check drive side detection 4514 * @dev: device 4515 * 4516 * Perform drive side detection decoding, allowing for device vendors 4517 * who can't follow the documentation. 4518 */ 4519 4520 static int ata_is_40wire(struct ata_device *dev) 4521 { 4522 if (dev->quirks & ATA_QUIRK_IVB) 4523 return ata_drive_40wire_relaxed(dev->id); 4524 return ata_drive_40wire(dev->id); 4525 } 4526 4527 /** 4528 * cable_is_40wire - 40/80/SATA decider 4529 * @ap: port to consider 4530 * 4531 * This function encapsulates the policy for speed management 4532 * in one place. At the moment we don't cache the result but 4533 * there is a good case for setting ap->cbl to the result when 4534 * we are called with unknown cables (and figuring out if it 4535 * impacts hotplug at all). 4536 * 4537 * Return 1 if the cable appears to be 40 wire. 4538 */ 4539 4540 static int cable_is_40wire(struct ata_port *ap) 4541 { 4542 struct ata_link *link; 4543 struct ata_device *dev; 4544 4545 /* If the controller thinks we are 40 wire, we are. */ 4546 if (ap->cbl == ATA_CBL_PATA40) 4547 return 1; 4548 4549 /* If the controller thinks we are 80 wire, we are. */ 4550 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA) 4551 return 0; 4552 4553 /* If the system is known to be 40 wire short cable (eg 4554 * laptop), then we allow 80 wire modes even if the drive 4555 * isn't sure. 4556 */ 4557 if (ap->cbl == ATA_CBL_PATA40_SHORT) 4558 return 0; 4559 4560 /* If the controller doesn't know, we scan. 4561 * 4562 * Note: We look for all 40 wire detects at this point. Any 4563 * 80 wire detect is taken to be 80 wire cable because 4564 * - in many setups only the one drive (slave if present) will 4565 * give a valid detect 4566 * - if you have a non detect capable drive you don't want it 4567 * to colour the choice 4568 */ 4569 ata_for_each_link(link, ap, EDGE) { 4570 ata_for_each_dev(dev, link, ENABLED) { 4571 if (!ata_is_40wire(dev)) 4572 return 0; 4573 } 4574 } 4575 return 1; 4576 } 4577 4578 /** 4579 * ata_dev_xfermask - Compute supported xfermask of the given device 4580 * @dev: Device to compute xfermask for 4581 * 4582 * Compute supported xfermask of @dev and store it in 4583 * dev->*_mask. This function is responsible for applying all 4584 * known limits including host controller limits, device quirks, etc... 4585 * 4586 * LOCKING: 4587 * None. 4588 */ 4589 static void ata_dev_xfermask(struct ata_device *dev) 4590 { 4591 struct ata_link *link = dev->link; 4592 struct ata_port *ap = link->ap; 4593 struct ata_host *host = ap->host; 4594 unsigned int xfer_mask; 4595 4596 /* controller modes available */ 4597 xfer_mask = ata_pack_xfermask(ap->pio_mask, 4598 ap->mwdma_mask, ap->udma_mask); 4599 4600 /* drive modes available */ 4601 xfer_mask &= ata_pack_xfermask(dev->pio_mask, 4602 dev->mwdma_mask, dev->udma_mask); 4603 xfer_mask &= ata_id_xfermask(dev->id); 4604 4605 /* 4606 * CFA Advanced TrueIDE timings are not allowed on a shared 4607 * cable 4608 */ 4609 if (ata_dev_pair(dev)) { 4610 /* No PIO5 or PIO6 */ 4611 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); 4612 /* No MWDMA3 or MWDMA 4 */ 4613 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); 4614 } 4615 4616 if (ata_dev_nodma(dev)) { 4617 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 4618 ata_dev_warn(dev, 4619 "device does not support DMA, disabling DMA\n"); 4620 } 4621 4622 if ((host->flags & ATA_HOST_SIMPLEX) && 4623 host->simplex_claimed && host->simplex_claimed != ap) { 4624 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 4625 ata_dev_warn(dev, 4626 "simplex DMA is claimed by other device, disabling DMA\n"); 4627 } 4628 4629 if (ap->flags & ATA_FLAG_NO_IORDY) 4630 xfer_mask &= ata_pio_mask_no_iordy(dev); 4631 4632 if (ap->ops->mode_filter) 4633 xfer_mask = ap->ops->mode_filter(dev, xfer_mask); 4634 4635 /* Apply cable rule here. Don't apply it early because when 4636 * we handle hot plug the cable type can itself change. 4637 * Check this last so that we know if the transfer rate was 4638 * solely limited by the cable. 4639 * Unknown or 80 wire cables reported host side are checked 4640 * drive side as well. Cases where we know a 40wire cable 4641 * is used safely for 80 are not checked here. 4642 */ 4643 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) 4644 /* UDMA/44 or higher would be available */ 4645 if (cable_is_40wire(ap)) { 4646 ata_dev_warn(dev, 4647 "limited to UDMA/33 due to 40-wire cable\n"); 4648 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); 4649 } 4650 4651 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, 4652 &dev->mwdma_mask, &dev->udma_mask); 4653 } 4654 4655 /** 4656 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command 4657 * @dev: Device to which command will be sent 4658 * 4659 * Issue SET FEATURES - XFER MODE command to device @dev 4660 * on port @ap. 4661 * 4662 * LOCKING: 4663 * PCI/etc. bus probe sem. 4664 * 4665 * RETURNS: 4666 * 0 on success, AC_ERR_* mask otherwise. 4667 */ 4668 4669 static unsigned int ata_dev_set_xfermode(struct ata_device *dev) 4670 { 4671 struct ata_taskfile tf; 4672 4673 /* set up set-features taskfile */ 4674 ata_dev_dbg(dev, "set features - xfer mode\n"); 4675 4676 /* Some controllers and ATAPI devices show flaky interrupt 4677 * behavior after setting xfer mode. Use polling instead. 4678 */ 4679 ata_tf_init(dev, &tf); 4680 tf.command = ATA_CMD_SET_FEATURES; 4681 tf.feature = SETFEATURES_XFER; 4682 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; 4683 tf.protocol = ATA_PROT_NODATA; 4684 /* If we are using IORDY we must send the mode setting command */ 4685 if (ata_pio_need_iordy(dev)) 4686 tf.nsect = dev->xfer_mode; 4687 /* If the device has IORDY and the controller does not - turn it off */ 4688 else if (ata_id_has_iordy(dev->id)) 4689 tf.nsect = 0x01; 4690 else /* In the ancient relic department - skip all of this */ 4691 return 0; 4692 4693 /* 4694 * On some disks, this command causes spin-up, so we need longer 4695 * timeout. 4696 */ 4697 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 15000); 4698 } 4699 4700 /** 4701 * ata_dev_set_feature - Issue SET FEATURES 4702 * @dev: Device to which command will be sent 4703 * @subcmd: The SET FEATURES subcommand to be sent 4704 * @action: The sector count represents a subcommand specific action 4705 * 4706 * Issue SET FEATURES command to device @dev on port @ap with sector count 4707 * 4708 * LOCKING: 4709 * PCI/etc. bus probe sem. 4710 * 4711 * RETURNS: 4712 * 0 on success, AC_ERR_* mask otherwise. 4713 */ 4714 unsigned int ata_dev_set_feature(struct ata_device *dev, u8 subcmd, u8 action) 4715 { 4716 struct ata_taskfile tf; 4717 unsigned int timeout = 0; 4718 4719 /* set up set-features taskfile */ 4720 ata_dev_dbg(dev, "set features\n"); 4721 4722 ata_tf_init(dev, &tf); 4723 tf.command = ATA_CMD_SET_FEATURES; 4724 tf.feature = subcmd; 4725 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 4726 tf.protocol = ATA_PROT_NODATA; 4727 tf.nsect = action; 4728 4729 if (subcmd == SETFEATURES_SPINUP) 4730 timeout = ata_probe_timeout ? 4731 ata_probe_timeout * 1000 : SETFEATURES_SPINUP_TIMEOUT; 4732 4733 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, timeout); 4734 } 4735 EXPORT_SYMBOL_GPL(ata_dev_set_feature); 4736 4737 /** 4738 * ata_dev_init_params - Issue INIT DEV PARAMS command 4739 * @dev: Device to which command will be sent 4740 * @heads: Number of heads (taskfile parameter) 4741 * @sectors: Number of sectors (taskfile parameter) 4742 * 4743 * LOCKING: 4744 * Kernel thread context (may sleep) 4745 * 4746 * RETURNS: 4747 * 0 on success, AC_ERR_* mask otherwise. 4748 */ 4749 static unsigned int ata_dev_init_params(struct ata_device *dev, 4750 u16 heads, u16 sectors) 4751 { 4752 struct ata_taskfile tf; 4753 unsigned int err_mask; 4754 4755 /* Number of sectors per track 1-255. Number of heads 1-16 */ 4756 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) 4757 return AC_ERR_INVALID; 4758 4759 /* set up init dev params taskfile */ 4760 ata_dev_dbg(dev, "init dev params\n"); 4761 4762 ata_tf_init(dev, &tf); 4763 tf.command = ATA_CMD_INIT_DEV_PARAMS; 4764 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 4765 tf.protocol = ATA_PROT_NODATA; 4766 tf.nsect = sectors; 4767 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ 4768 4769 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 4770 /* A clean abort indicates an original or just out of spec drive 4771 and we should continue as we issue the setup based on the 4772 drive reported working geometry */ 4773 if (err_mask == AC_ERR_DEV && (tf.error & ATA_ABORTED)) 4774 err_mask = 0; 4775 4776 return err_mask; 4777 } 4778 4779 /** 4780 * atapi_check_dma - Check whether ATAPI DMA can be supported 4781 * @qc: Metadata associated with taskfile to check 4782 * 4783 * Allow low-level driver to filter ATA PACKET commands, returning 4784 * a status indicating whether or not it is OK to use DMA for the 4785 * supplied PACKET command. 4786 * 4787 * LOCKING: 4788 * spin_lock_irqsave(host lock) 4789 * 4790 * RETURNS: 0 when ATAPI DMA can be used 4791 * nonzero otherwise 4792 */ 4793 int atapi_check_dma(struct ata_queued_cmd *qc) 4794 { 4795 struct ata_port *ap = qc->ap; 4796 4797 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a 4798 * few ATAPI devices choke on such DMA requests. 4799 */ 4800 if (!(qc->dev->quirks & ATA_QUIRK_ATAPI_MOD16_DMA) && 4801 unlikely(qc->nbytes & 15)) 4802 return -EOPNOTSUPP; 4803 4804 if (ap->ops->check_atapi_dma) 4805 return ap->ops->check_atapi_dma(qc); 4806 4807 return 0; 4808 } 4809 4810 /** 4811 * ata_std_qc_defer - Check whether a qc needs to be deferred 4812 * @qc: ATA command in question 4813 * 4814 * Non-NCQ commands cannot run with any other command, NCQ or 4815 * not. As upper layer only knows the queue depth, we are 4816 * responsible for maintaining exclusion. This function checks 4817 * whether a new command @qc can be issued. 4818 * 4819 * LOCKING: 4820 * spin_lock_irqsave(host lock) 4821 * 4822 * RETURNS: 4823 * ATA_DEFER_* if deferring is needed, 0 otherwise. 4824 */ 4825 int ata_std_qc_defer(struct ata_queued_cmd *qc) 4826 { 4827 struct ata_link *link = qc->dev->link; 4828 4829 if (ata_is_ncq(qc->tf.protocol)) { 4830 if (!ata_tag_valid(link->active_tag)) 4831 return 0; 4832 } else { 4833 if (!ata_tag_valid(link->active_tag) && !link->sactive) 4834 return 0; 4835 } 4836 4837 return ATA_DEFER_LINK; 4838 } 4839 EXPORT_SYMBOL_GPL(ata_std_qc_defer); 4840 4841 /** 4842 * ata_sg_init - Associate command with scatter-gather table. 4843 * @qc: Command to be associated 4844 * @sg: Scatter-gather table. 4845 * @n_elem: Number of elements in s/g table. 4846 * 4847 * Initialize the data-related elements of queued_cmd @qc 4848 * to point to a scatter-gather table @sg, containing @n_elem 4849 * elements. 4850 * 4851 * LOCKING: 4852 * spin_lock_irqsave(host lock) 4853 */ 4854 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 4855 unsigned int n_elem) 4856 { 4857 qc->sg = sg; 4858 qc->n_elem = n_elem; 4859 qc->cursg = qc->sg; 4860 } 4861 4862 #ifdef CONFIG_HAS_DMA 4863 4864 /** 4865 * ata_sg_clean - Unmap DMA memory associated with command 4866 * @qc: Command containing DMA memory to be released 4867 * 4868 * Unmap all mapped DMA memory associated with this command. 4869 * 4870 * LOCKING: 4871 * spin_lock_irqsave(host lock) 4872 */ 4873 static void ata_sg_clean(struct ata_queued_cmd *qc) 4874 { 4875 struct ata_port *ap = qc->ap; 4876 struct scatterlist *sg = qc->sg; 4877 int dir = qc->dma_dir; 4878 4879 WARN_ON_ONCE(sg == NULL); 4880 4881 if (qc->n_elem) 4882 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir); 4883 4884 qc->flags &= ~ATA_QCFLAG_DMAMAP; 4885 qc->sg = NULL; 4886 } 4887 4888 /** 4889 * ata_sg_setup - DMA-map the scatter-gather table associated with a command. 4890 * @qc: Command with scatter-gather table to be mapped. 4891 * 4892 * DMA-map the scatter-gather table associated with queued_cmd @qc. 4893 * 4894 * LOCKING: 4895 * spin_lock_irqsave(host lock) 4896 * 4897 * RETURNS: 4898 * Zero on success, negative on error. 4899 * 4900 */ 4901 static int ata_sg_setup(struct ata_queued_cmd *qc) 4902 { 4903 struct ata_port *ap = qc->ap; 4904 unsigned int n_elem; 4905 4906 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir); 4907 if (n_elem < 1) 4908 return -1; 4909 4910 qc->orig_n_elem = qc->n_elem; 4911 qc->n_elem = n_elem; 4912 qc->flags |= ATA_QCFLAG_DMAMAP; 4913 4914 return 0; 4915 } 4916 4917 #else /* !CONFIG_HAS_DMA */ 4918 4919 static inline void ata_sg_clean(struct ata_queued_cmd *qc) {} 4920 static inline int ata_sg_setup(struct ata_queued_cmd *qc) { return -1; } 4921 4922 #endif /* !CONFIG_HAS_DMA */ 4923 4924 /** 4925 * swap_buf_le16 - swap halves of 16-bit words in place 4926 * @buf: Buffer to swap 4927 * @buf_words: Number of 16-bit words in buffer. 4928 * 4929 * Swap halves of 16-bit words if needed to convert from 4930 * little-endian byte order to native cpu byte order, or 4931 * vice-versa. 4932 * 4933 * LOCKING: 4934 * Inherited from caller. 4935 */ 4936 void swap_buf_le16(u16 *buf, unsigned int buf_words) 4937 { 4938 #ifdef __BIG_ENDIAN 4939 unsigned int i; 4940 4941 for (i = 0; i < buf_words; i++) 4942 buf[i] = le16_to_cpu(buf[i]); 4943 #endif /* __BIG_ENDIAN */ 4944 } 4945 4946 /** 4947 * ata_qc_free - free unused ata_queued_cmd 4948 * @qc: Command to complete 4949 * 4950 * Designed to free unused ata_queued_cmd object 4951 * in case something prevents using it. 4952 * 4953 * LOCKING: 4954 * spin_lock_irqsave(host lock) 4955 */ 4956 void ata_qc_free(struct ata_queued_cmd *qc) 4957 { 4958 qc->flags = 0; 4959 if (ata_tag_valid(qc->tag)) 4960 qc->tag = ATA_TAG_POISON; 4961 } 4962 4963 void __ata_qc_complete(struct ata_queued_cmd *qc) 4964 { 4965 struct ata_port *ap; 4966 struct ata_link *link; 4967 4968 if (WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE))) 4969 return; 4970 4971 ap = qc->ap; 4972 link = qc->dev->link; 4973 4974 if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) 4975 ata_sg_clean(qc); 4976 4977 /* command should be marked inactive atomically with qc completion */ 4978 if (ata_is_ncq(qc->tf.protocol)) { 4979 link->sactive &= ~(1 << qc->hw_tag); 4980 if (!link->sactive) 4981 ap->nr_active_links--; 4982 } else { 4983 link->active_tag = ATA_TAG_POISON; 4984 ap->nr_active_links--; 4985 } 4986 4987 /* clear exclusive status */ 4988 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && 4989 ap->excl_link == link)) 4990 ap->excl_link = NULL; 4991 4992 /* 4993 * Mark qc as inactive to prevent the port interrupt handler from 4994 * completing the command twice later, before the error handler is 4995 * called. 4996 */ 4997 qc->flags &= ~ATA_QCFLAG_ACTIVE; 4998 ap->qc_active &= ~(1ULL << qc->tag); 4999 5000 /* call completion callback */ 5001 qc->complete_fn(qc); 5002 } 5003 5004 static void fill_result_tf(struct ata_queued_cmd *qc) 5005 { 5006 struct ata_port *ap = qc->ap; 5007 5008 /* 5009 * rtf may already be filled (e.g. for successful NCQ commands). 5010 * If that is the case, we have nothing to do. 5011 */ 5012 if (qc->flags & ATA_QCFLAG_RTF_FILLED) 5013 return; 5014 5015 qc->result_tf.flags = qc->tf.flags; 5016 ap->ops->qc_fill_rtf(qc); 5017 qc->flags |= ATA_QCFLAG_RTF_FILLED; 5018 } 5019 5020 static void ata_verify_xfer(struct ata_queued_cmd *qc) 5021 { 5022 struct ata_device *dev = qc->dev; 5023 5024 if (!ata_is_data(qc->tf.protocol)) 5025 return; 5026 5027 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol)) 5028 return; 5029 5030 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER; 5031 } 5032 5033 /** 5034 * ata_qc_complete - Complete an active ATA command 5035 * @qc: Command to complete 5036 * 5037 * Indicate to the mid and upper layers that an ATA command has 5038 * completed, with either an ok or not-ok status. 5039 * 5040 * Refrain from calling this function multiple times when 5041 * successfully completing multiple NCQ commands. 5042 * ata_qc_complete_multiple() should be used instead, which will 5043 * properly update IRQ expect state. 5044 * 5045 * LOCKING: 5046 * spin_lock_irqsave(host lock) 5047 */ 5048 void ata_qc_complete(struct ata_queued_cmd *qc) 5049 { 5050 struct ata_port *ap = qc->ap; 5051 struct ata_device *dev = qc->dev; 5052 struct ata_eh_info *ehi = &dev->link->eh_info; 5053 5054 /* Trigger the LED (if available) */ 5055 ledtrig_disk_activity(!!(qc->tf.flags & ATA_TFLAG_WRITE)); 5056 5057 /* 5058 * In order to synchronize EH with the regular execution path, a qc that 5059 * is owned by EH is marked with ATA_QCFLAG_EH. 5060 * 5061 * The normal execution path is responsible for not accessing a qc owned 5062 * by EH. libata core enforces the rule by returning NULL from 5063 * ata_qc_from_tag() for qcs owned by EH. 5064 */ 5065 if (unlikely(qc->err_mask)) 5066 qc->flags |= ATA_QCFLAG_EH; 5067 5068 /* 5069 * Finish internal commands without any further processing and always 5070 * with the result TF filled. 5071 */ 5072 if (unlikely(ata_tag_internal(qc->tag))) { 5073 fill_result_tf(qc); 5074 trace_ata_qc_complete_internal(qc); 5075 __ata_qc_complete(qc); 5076 return; 5077 } 5078 5079 /* Non-internal qc has failed. Fill the result TF and summon EH. */ 5080 if (unlikely(qc->flags & ATA_QCFLAG_EH)) { 5081 fill_result_tf(qc); 5082 trace_ata_qc_complete_failed(qc); 5083 ata_qc_schedule_eh(qc); 5084 return; 5085 } 5086 5087 WARN_ON_ONCE(ata_port_is_frozen(ap)); 5088 5089 /* read result TF if requested */ 5090 if (qc->flags & ATA_QCFLAG_RESULT_TF) 5091 fill_result_tf(qc); 5092 5093 trace_ata_qc_complete_done(qc); 5094 5095 /* 5096 * For CDL commands that completed without an error, check if we have 5097 * sense data (ATA_SENSE is set). If we do, then the command may have 5098 * been aborted by the device due to a limit timeout using the policy 5099 * 0xD. For these commands, invoke EH to get the command sense data. 5100 */ 5101 if (qc->flags & ATA_QCFLAG_HAS_CDL && 5102 qc->result_tf.status & ATA_SENSE) { 5103 /* 5104 * Tell SCSI EH to not overwrite scmd->result even if this 5105 * command is finished with result SAM_STAT_GOOD. 5106 */ 5107 qc->scsicmd->flags |= SCMD_FORCE_EH_SUCCESS; 5108 qc->flags |= ATA_QCFLAG_EH_SUCCESS_CMD; 5109 ehi->dev_action[dev->devno] |= ATA_EH_GET_SUCCESS_SENSE; 5110 5111 /* 5112 * set pending so that ata_qc_schedule_eh() does not trigger 5113 * fast drain, and freeze the port. 5114 */ 5115 ap->pflags |= ATA_PFLAG_EH_PENDING; 5116 ata_qc_schedule_eh(qc); 5117 return; 5118 } 5119 5120 /* Some commands need post-processing after successful completion. */ 5121 switch (qc->tf.command) { 5122 case ATA_CMD_SET_FEATURES: 5123 if (qc->tf.feature != SETFEATURES_WC_ON && 5124 qc->tf.feature != SETFEATURES_WC_OFF && 5125 qc->tf.feature != SETFEATURES_RA_ON && 5126 qc->tf.feature != SETFEATURES_RA_OFF) 5127 break; 5128 fallthrough; 5129 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */ 5130 case ATA_CMD_SET_MULTI: /* multi_count changed */ 5131 /* revalidate device */ 5132 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE; 5133 ata_port_schedule_eh(ap); 5134 break; 5135 5136 case ATA_CMD_SLEEP: 5137 dev->flags |= ATA_DFLAG_SLEEPING; 5138 break; 5139 } 5140 5141 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) 5142 ata_verify_xfer(qc); 5143 5144 __ata_qc_complete(qc); 5145 } 5146 EXPORT_SYMBOL_GPL(ata_qc_complete); 5147 5148 /** 5149 * ata_qc_get_active - get bitmask of active qcs 5150 * @ap: port in question 5151 * 5152 * LOCKING: 5153 * spin_lock_irqsave(host lock) 5154 * 5155 * RETURNS: 5156 * Bitmask of active qcs 5157 */ 5158 u64 ata_qc_get_active(struct ata_port *ap) 5159 { 5160 u64 qc_active = ap->qc_active; 5161 5162 /* ATA_TAG_INTERNAL is sent to hw as tag 0 */ 5163 if (qc_active & (1ULL << ATA_TAG_INTERNAL)) { 5164 qc_active |= (1 << 0); 5165 qc_active &= ~(1ULL << ATA_TAG_INTERNAL); 5166 } 5167 5168 return qc_active; 5169 } 5170 EXPORT_SYMBOL_GPL(ata_qc_get_active); 5171 5172 /** 5173 * ata_qc_issue - issue taskfile to device 5174 * @ap: ATA port of interest 5175 * @qc: command to issue to device 5176 * 5177 * Prepare an ATA command to submission to device. 5178 * This includes mapping the data into a DMA-able 5179 * area, filling in the S/G table, and finally 5180 * writing the taskfile to hardware, starting the command. 5181 * 5182 * LOCKING: 5183 * spin_lock_irqsave(host lock) 5184 */ 5185 void ata_qc_issue(struct ata_port *ap, struct ata_queued_cmd *qc) 5186 __must_hold(ap->lock) 5187 { 5188 struct ata_link *link = qc->dev->link; 5189 u8 prot = qc->tf.protocol; 5190 5191 /* 5192 * Make sure we have a valid tag and that only one non-NCQ command is 5193 * outstanding. 5194 */ 5195 if (WARN_ON_ONCE(!ata_tag_valid(qc->tag)) || 5196 WARN_ON_ONCE(ata_tag_valid(link->active_tag))) 5197 goto sys_err; 5198 5199 if (ata_is_ncq(prot)) { 5200 WARN_ON_ONCE(link->sactive & (1 << qc->hw_tag)); 5201 5202 if (!link->sactive) 5203 ap->nr_active_links++; 5204 link->sactive |= 1 << qc->hw_tag; 5205 } else { 5206 WARN_ON_ONCE(link->sactive); 5207 5208 ap->nr_active_links++; 5209 link->active_tag = qc->tag; 5210 } 5211 5212 qc->flags |= ATA_QCFLAG_ACTIVE; 5213 ap->qc_active |= 1ULL << qc->tag; 5214 5215 /* Make sure the device is still accessible. */ 5216 if (!ata_adapter_is_online(ap)) { 5217 qc->err_mask |= AC_ERR_HOST_BUS; 5218 goto sys_err; 5219 } 5220 5221 /* 5222 * We guarantee to LLDs that they will have at least one 5223 * non-zero sg if the command is a data command. 5224 */ 5225 if (ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes)) 5226 goto sys_err; 5227 5228 if (ata_is_dma(prot) || (ata_is_pio(prot) && 5229 (ap->flags & ATA_FLAG_PIO_DMA))) 5230 if (ata_sg_setup(qc)) 5231 goto sys_err; 5232 5233 /* if device is sleeping, schedule reset and abort the link */ 5234 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) { 5235 link->eh_info.action |= ATA_EH_RESET; 5236 ata_ehi_push_desc(&link->eh_info, "waking up from sleep"); 5237 ata_link_abort(link); 5238 return; 5239 } 5240 5241 if (ap->ops->qc_prep) { 5242 trace_ata_qc_prep(qc); 5243 qc->err_mask |= ap->ops->qc_prep(qc); 5244 if (unlikely(qc->err_mask)) 5245 goto err; 5246 } 5247 5248 trace_ata_qc_issue(qc); 5249 qc->err_mask |= ap->ops->qc_issue(qc); 5250 if (unlikely(qc->err_mask)) 5251 goto err; 5252 return; 5253 5254 sys_err: 5255 qc->err_mask |= AC_ERR_SYSTEM; 5256 err: 5257 ata_qc_complete(qc); 5258 } 5259 5260 /** 5261 * ata_phys_link_online - test whether the given link is online 5262 * @link: ATA link to test 5263 * 5264 * Test whether @link is online. Note that this function returns 5265 * 0 if online status of @link cannot be obtained, so 5266 * ata_link_online(link) != !ata_link_offline(link). 5267 * 5268 * LOCKING: 5269 * None. 5270 * 5271 * RETURNS: 5272 * True if the port online status is available and online. 5273 */ 5274 bool ata_phys_link_online(struct ata_link *link) 5275 { 5276 u32 sstatus; 5277 5278 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && 5279 ata_sstatus_online(sstatus)) 5280 return true; 5281 return false; 5282 } 5283 5284 /** 5285 * ata_phys_link_offline - test whether the given link is offline 5286 * @link: ATA link to test 5287 * 5288 * Test whether @link is offline. Note that this function 5289 * returns 0 if offline status of @link cannot be obtained, so 5290 * ata_link_online(link) != !ata_link_offline(link). 5291 * 5292 * LOCKING: 5293 * None. 5294 * 5295 * RETURNS: 5296 * True if the port offline status is available and offline. 5297 */ 5298 bool ata_phys_link_offline(struct ata_link *link) 5299 { 5300 u32 sstatus; 5301 5302 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && 5303 !ata_sstatus_online(sstatus)) 5304 return true; 5305 return false; 5306 } 5307 5308 /** 5309 * ata_link_online - test whether the given link is online 5310 * @link: ATA link to test 5311 * 5312 * Test whether @link is online. This is identical to 5313 * ata_phys_link_online() when there's no slave link. When 5314 * there's a slave link, this function should only be called on 5315 * the master link and will return true if any of M/S links is 5316 * online. 5317 * 5318 * LOCKING: 5319 * None. 5320 * 5321 * RETURNS: 5322 * True if the port online status is available and online. 5323 */ 5324 bool ata_link_online(struct ata_link *link) 5325 { 5326 struct ata_link *slave = link->ap->slave_link; 5327 5328 WARN_ON(link == slave); /* shouldn't be called on slave link */ 5329 5330 return ata_phys_link_online(link) || 5331 (slave && ata_phys_link_online(slave)); 5332 } 5333 EXPORT_SYMBOL_GPL(ata_link_online); 5334 5335 /** 5336 * ata_link_offline - test whether the given link is offline 5337 * @link: ATA link to test 5338 * 5339 * Test whether @link is offline. This is identical to 5340 * ata_phys_link_offline() when there's no slave link. When 5341 * there's a slave link, this function should only be called on 5342 * the master link and will return true if both M/S links are 5343 * offline. 5344 * 5345 * LOCKING: 5346 * None. 5347 * 5348 * RETURNS: 5349 * True if the port offline status is available and offline. 5350 */ 5351 bool ata_link_offline(struct ata_link *link) 5352 { 5353 struct ata_link *slave = link->ap->slave_link; 5354 5355 WARN_ON(link == slave); /* shouldn't be called on slave link */ 5356 5357 return ata_phys_link_offline(link) && 5358 (!slave || ata_phys_link_offline(slave)); 5359 } 5360 EXPORT_SYMBOL_GPL(ata_link_offline); 5361 5362 #ifdef CONFIG_PM 5363 static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg, 5364 unsigned int action, unsigned int ehi_flags, 5365 bool async) 5366 { 5367 struct ata_link *link; 5368 unsigned long flags; 5369 5370 spin_lock_irqsave(ap->lock, flags); 5371 5372 /* 5373 * A previous PM operation might still be in progress. Wait for 5374 * ATA_PFLAG_PM_PENDING to clear. 5375 */ 5376 if (ap->pflags & ATA_PFLAG_PM_PENDING) { 5377 spin_unlock_irqrestore(ap->lock, flags); 5378 ata_port_wait_eh(ap); 5379 spin_lock_irqsave(ap->lock, flags); 5380 } 5381 5382 /* Request PM operation to EH */ 5383 ap->pm_mesg = mesg; 5384 ap->pflags |= ATA_PFLAG_PM_PENDING; 5385 ata_for_each_link(link, ap, HOST_FIRST) { 5386 link->eh_info.action |= action; 5387 link->eh_info.flags |= ehi_flags; 5388 } 5389 5390 ata_port_schedule_eh(ap); 5391 5392 spin_unlock_irqrestore(ap->lock, flags); 5393 5394 if (!async) 5395 ata_port_wait_eh(ap); 5396 } 5397 5398 static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg, 5399 bool async) 5400 { 5401 /* 5402 * We are about to suspend the port, so we do not care about 5403 * scsi_rescan_device() calls scheduled by previous resume operations. 5404 * The next resume will schedule the rescan again. So cancel any rescan 5405 * that is not done yet. 5406 */ 5407 cancel_delayed_work_sync(&ap->scsi_rescan_task); 5408 5409 /* 5410 * On some hardware, device fails to respond after spun down for 5411 * suspend. As the device will not be used until being resumed, we 5412 * do not need to touch the device. Ask EH to skip the usual stuff 5413 * and proceed directly to suspend. 5414 * 5415 * http://thread.gmane.org/gmane.linux.ide/46764 5416 */ 5417 ata_port_request_pm(ap, mesg, 0, 5418 ATA_EHI_QUIET | ATA_EHI_NO_AUTOPSY | 5419 ATA_EHI_NO_RECOVERY, 5420 async); 5421 } 5422 5423 static int ata_port_pm_suspend(struct device *dev) 5424 { 5425 struct ata_port *ap = to_ata_port(dev); 5426 5427 if (pm_runtime_suspended(dev)) 5428 return 0; 5429 5430 ata_port_suspend(ap, PMSG_SUSPEND, false); 5431 return 0; 5432 } 5433 5434 static int ata_port_pm_freeze(struct device *dev) 5435 { 5436 struct ata_port *ap = to_ata_port(dev); 5437 5438 if (pm_runtime_suspended(dev)) 5439 return 0; 5440 5441 ata_port_suspend(ap, PMSG_FREEZE, false); 5442 return 0; 5443 } 5444 5445 static int ata_port_pm_poweroff(struct device *dev) 5446 { 5447 if (!pm_runtime_suspended(dev)) 5448 ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE, false); 5449 return 0; 5450 } 5451 5452 static void ata_port_resume(struct ata_port *ap, pm_message_t mesg, 5453 bool async) 5454 { 5455 ata_port_request_pm(ap, mesg, ATA_EH_RESET, 5456 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 5457 async); 5458 } 5459 5460 static int ata_port_pm_resume(struct device *dev) 5461 { 5462 if (!pm_runtime_suspended(dev)) 5463 ata_port_resume(to_ata_port(dev), PMSG_RESUME, true); 5464 return 0; 5465 } 5466 5467 /* 5468 * For ODDs, the upper layer will poll for media change every few seconds, 5469 * which will make it enter and leave suspend state every few seconds. And 5470 * as each suspend will cause a hard/soft reset, the gain of runtime suspend 5471 * is very little and the ODD may malfunction after constantly being reset. 5472 * So the idle callback here will not proceed to suspend if a non-ZPODD capable 5473 * ODD is attached to the port. 5474 */ 5475 static int ata_port_runtime_idle(struct device *dev) 5476 { 5477 struct ata_port *ap = to_ata_port(dev); 5478 struct ata_link *link; 5479 struct ata_device *adev; 5480 5481 ata_for_each_link(link, ap, HOST_FIRST) { 5482 ata_for_each_dev(adev, link, ENABLED) 5483 if (adev->class == ATA_DEV_ATAPI && 5484 !zpodd_dev_enabled(adev)) 5485 return -EBUSY; 5486 } 5487 5488 return 0; 5489 } 5490 5491 static int ata_port_runtime_suspend(struct device *dev) 5492 { 5493 ata_port_suspend(to_ata_port(dev), PMSG_AUTO_SUSPEND, false); 5494 return 0; 5495 } 5496 5497 static int ata_port_runtime_resume(struct device *dev) 5498 { 5499 ata_port_resume(to_ata_port(dev), PMSG_AUTO_RESUME, false); 5500 return 0; 5501 } 5502 5503 static const struct dev_pm_ops ata_port_pm_ops = { 5504 .suspend = ata_port_pm_suspend, 5505 .resume = ata_port_pm_resume, 5506 .freeze = ata_port_pm_freeze, 5507 .thaw = ata_port_pm_resume, 5508 .poweroff = ata_port_pm_poweroff, 5509 .restore = ata_port_pm_resume, 5510 5511 .runtime_suspend = ata_port_runtime_suspend, 5512 .runtime_resume = ata_port_runtime_resume, 5513 .runtime_idle = ata_port_runtime_idle, 5514 }; 5515 5516 /* sas ports don't participate in pm runtime management of ata_ports, 5517 * and need to resume ata devices at the domain level, not the per-port 5518 * level. sas suspend/resume is async to allow parallel port recovery 5519 * since sas has multiple ata_port instances per Scsi_Host. 5520 */ 5521 void ata_sas_port_suspend(struct ata_port *ap) 5522 { 5523 ata_port_suspend(ap, PMSG_SUSPEND, true); 5524 } 5525 EXPORT_SYMBOL_GPL(ata_sas_port_suspend); 5526 5527 void ata_sas_port_resume(struct ata_port *ap) 5528 { 5529 ata_port_resume(ap, PMSG_RESUME, true); 5530 } 5531 EXPORT_SYMBOL_GPL(ata_sas_port_resume); 5532 5533 /** 5534 * ata_host_suspend - suspend host 5535 * @host: host to suspend 5536 * @mesg: PM message 5537 * 5538 * Suspend @host. Actual operation is performed by port suspend. 5539 */ 5540 void ata_host_suspend(struct ata_host *host, pm_message_t mesg) 5541 { 5542 host->dev->power.power_state = mesg; 5543 } 5544 EXPORT_SYMBOL_GPL(ata_host_suspend); 5545 5546 /** 5547 * ata_host_resume - resume host 5548 * @host: host to resume 5549 * 5550 * Resume @host. Actual operation is performed by port resume. 5551 */ 5552 void ata_host_resume(struct ata_host *host) 5553 { 5554 host->dev->power.power_state = PMSG_ON; 5555 } 5556 EXPORT_SYMBOL_GPL(ata_host_resume); 5557 #endif 5558 5559 const struct device_type ata_port_type = { 5560 .name = ATA_PORT_TYPE_NAME, 5561 #ifdef CONFIG_PM 5562 .pm = &ata_port_pm_ops, 5563 #endif 5564 }; 5565 5566 /** 5567 * ata_dev_init - Initialize an ata_device structure 5568 * @dev: Device structure to initialize 5569 * 5570 * Initialize @dev in preparation for probing. 5571 * 5572 * LOCKING: 5573 * Inherited from caller. 5574 */ 5575 void ata_dev_init(struct ata_device *dev) 5576 { 5577 struct ata_link *link = ata_dev_phys_link(dev); 5578 struct ata_port *ap = link->ap; 5579 unsigned long flags; 5580 5581 /* SATA spd limit is bound to the attached device, reset together */ 5582 link->sata_spd_limit = link->hw_sata_spd_limit; 5583 link->sata_spd = 0; 5584 5585 /* High bits of dev->flags are used to record warm plug 5586 * requests which occur asynchronously. Synchronize using 5587 * host lock. 5588 */ 5589 spin_lock_irqsave(ap->lock, flags); 5590 dev->flags &= ~ATA_DFLAG_INIT_MASK; 5591 dev->quirks = 0; 5592 spin_unlock_irqrestore(ap->lock, flags); 5593 5594 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0, 5595 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN); 5596 dev->pio_mask = UINT_MAX; 5597 dev->mwdma_mask = UINT_MAX; 5598 dev->udma_mask = UINT_MAX; 5599 } 5600 5601 /** 5602 * ata_link_init - Initialize an ata_link structure 5603 * @ap: ATA port link is attached to 5604 * @link: Link structure to initialize 5605 * @pmp: Port multiplier port number 5606 * 5607 * Initialize @link. 5608 * 5609 * LOCKING: 5610 * Kernel thread context (may sleep) 5611 */ 5612 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) 5613 { 5614 int i; 5615 5616 /* clear everything except for devices */ 5617 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0, 5618 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN); 5619 5620 link->ap = ap; 5621 link->pmp = pmp; 5622 link->active_tag = ATA_TAG_POISON; 5623 link->hw_sata_spd_limit = UINT_MAX; 5624 INIT_WORK(&link->deferred_qc_work, ata_scsi_deferred_qc_work); 5625 5626 /* can't use iterator, ap isn't initialized yet */ 5627 for (i = 0; i < ATA_MAX_DEVICES; i++) { 5628 struct ata_device *dev = &link->device[i]; 5629 5630 dev->link = link; 5631 dev->devno = dev - link->device; 5632 #ifdef CONFIG_ATA_ACPI 5633 dev->gtf_filter = ata_acpi_gtf_filter; 5634 #endif 5635 ata_dev_init(dev); 5636 } 5637 } 5638 5639 /** 5640 * sata_link_init_spd - Initialize link->sata_spd_limit 5641 * @link: Link to configure sata_spd_limit for 5642 * 5643 * Initialize ``link->[hw_]sata_spd_limit`` to the currently 5644 * configured value. 5645 * 5646 * LOCKING: 5647 * Kernel thread context (may sleep). 5648 * 5649 * RETURNS: 5650 * 0 on success, -errno on failure. 5651 */ 5652 int sata_link_init_spd(struct ata_link *link) 5653 { 5654 u8 spd; 5655 int rc; 5656 5657 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol); 5658 if (rc) 5659 return rc; 5660 5661 spd = (link->saved_scontrol >> 4) & 0xf; 5662 if (spd) 5663 link->hw_sata_spd_limit &= (1 << spd) - 1; 5664 5665 ata_force_link_limits(link); 5666 5667 link->sata_spd_limit = link->hw_sata_spd_limit; 5668 5669 return 0; 5670 } 5671 5672 /** 5673 * ata_port_alloc - allocate and initialize basic ATA port resources 5674 * @host: ATA host this allocated port belongs to 5675 * 5676 * Allocate and initialize basic ATA port resources. 5677 * 5678 * RETURNS: 5679 * Allocate ATA port on success, NULL on failure. 5680 * 5681 * LOCKING: 5682 * Inherited from calling layer (may sleep). 5683 */ 5684 struct ata_port *ata_port_alloc(struct ata_host *host) 5685 { 5686 struct ata_port *ap; 5687 int id; 5688 5689 ap = kzalloc_obj(*ap); 5690 if (!ap) 5691 return NULL; 5692 5693 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN; 5694 ap->lock = &host->lock; 5695 id = ida_alloc_min(&ata_ida, 1, GFP_KERNEL); 5696 if (id < 0) { 5697 kfree(ap); 5698 return NULL; 5699 } 5700 ap->print_id = id; 5701 ap->host = host; 5702 ap->dev = host->dev; 5703 5704 mutex_init(&ap->scsi_scan_mutex); 5705 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); 5706 INIT_DELAYED_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); 5707 INIT_LIST_HEAD(&ap->eh_done_q); 5708 init_waitqueue_head(&ap->eh_wait_q); 5709 init_completion(&ap->park_req_pending); 5710 timer_setup(&ap->fastdrain_timer, ata_eh_fastdrain_timerfn, 5711 TIMER_DEFERRABLE); 5712 5713 ap->cbl = ATA_CBL_NONE; 5714 5715 ata_link_init(ap, &ap->link, 0); 5716 5717 #ifdef ATA_IRQ_TRAP 5718 ap->stats.unhandled_irq = 1; 5719 ap->stats.idle_irq = 1; 5720 #endif 5721 ata_sff_port_init(ap); 5722 5723 ata_force_pflags(ap); 5724 5725 return ap; 5726 } 5727 EXPORT_SYMBOL_GPL(ata_port_alloc); 5728 5729 void ata_port_free(struct ata_port *ap) 5730 { 5731 if (!ap) 5732 return; 5733 5734 kfree(ap->pmp_link); 5735 kfree(ap->slave_link); 5736 ida_free(&ata_ida, ap->print_id); 5737 kfree(ap); 5738 } 5739 EXPORT_SYMBOL_GPL(ata_port_free); 5740 5741 static void ata_devres_release(struct device *gendev, void *res) 5742 { 5743 struct ata_host *host = dev_get_drvdata(gendev); 5744 int i; 5745 5746 for (i = 0; i < host->n_ports; i++) { 5747 struct ata_port *ap = host->ports[i]; 5748 5749 if (!ap) 5750 continue; 5751 5752 if (ap->scsi_host) 5753 scsi_host_put(ap->scsi_host); 5754 5755 } 5756 5757 dev_set_drvdata(gendev, NULL); 5758 ata_host_put(host); 5759 } 5760 5761 static void ata_host_release(struct kref *kref) 5762 { 5763 struct ata_host *host = container_of(kref, struct ata_host, kref); 5764 int i; 5765 5766 for (i = 0; i < host->n_ports; i++) { 5767 ata_port_free(host->ports[i]); 5768 host->ports[i] = NULL; 5769 } 5770 kfree(host); 5771 } 5772 5773 void ata_host_get(struct ata_host *host) 5774 { 5775 kref_get(&host->kref); 5776 } 5777 5778 void ata_host_put(struct ata_host *host) 5779 { 5780 kref_put(&host->kref, ata_host_release); 5781 } 5782 EXPORT_SYMBOL_GPL(ata_host_put); 5783 5784 /** 5785 * ata_host_alloc - allocate and init basic ATA host resources 5786 * @dev: generic device this host is associated with 5787 * @n_ports: the number of ATA ports associated with this host 5788 * 5789 * Allocate and initialize basic ATA host resources. LLD calls 5790 * this function to allocate a host, initializes it fully and 5791 * attaches it using ata_host_register(). 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(struct device *dev, int n_ports) 5800 { 5801 struct ata_host *host; 5802 size_t sz; 5803 int i; 5804 void *dr; 5805 5806 /* alloc a container for our list of ATA ports (buses) */ 5807 sz = sizeof(struct ata_host) + n_ports * sizeof(void *); 5808 host = kzalloc(sz, GFP_KERNEL); 5809 if (!host) 5810 return NULL; 5811 5812 if (!devres_open_group(dev, NULL, GFP_KERNEL)) { 5813 kfree(host); 5814 return NULL; 5815 } 5816 5817 dr = devres_alloc(ata_devres_release, 0, GFP_KERNEL); 5818 if (!dr) { 5819 kfree(host); 5820 goto err_out; 5821 } 5822 5823 devres_add(dev, dr); 5824 dev_set_drvdata(dev, host); 5825 5826 spin_lock_init(&host->lock); 5827 mutex_init(&host->eh_mutex); 5828 host->dev = dev; 5829 host->n_ports = n_ports; 5830 kref_init(&host->kref); 5831 5832 /* allocate ports bound to this host */ 5833 for (i = 0; i < n_ports; i++) { 5834 struct ata_port *ap; 5835 5836 ap = ata_port_alloc(host); 5837 if (!ap) 5838 goto err_out; 5839 5840 ap->port_no = i; 5841 host->ports[i] = ap; 5842 } 5843 5844 devres_remove_group(dev, NULL); 5845 return host; 5846 5847 err_out: 5848 devres_release_group(dev, NULL); 5849 return NULL; 5850 } 5851 EXPORT_SYMBOL_GPL(ata_host_alloc); 5852 5853 /** 5854 * ata_host_alloc_pinfo - alloc host and init with port_info array 5855 * @dev: generic device this host is associated with 5856 * @ppi: array of ATA port_info to initialize host with 5857 * @n_ports: number of ATA ports attached to this host 5858 * 5859 * Allocate ATA host and initialize with info from @ppi. If NULL 5860 * terminated, @ppi may contain fewer entries than @n_ports. The 5861 * last entry will be used for the remaining ports. 5862 * 5863 * RETURNS: 5864 * Allocate ATA host on success, NULL on failure. 5865 * 5866 * LOCKING: 5867 * Inherited from calling layer (may sleep). 5868 */ 5869 struct ata_host *ata_host_alloc_pinfo(struct device *dev, 5870 const struct ata_port_info * const * ppi, 5871 int n_ports) 5872 { 5873 const struct ata_port_info *pi = &ata_dummy_port_info; 5874 struct ata_host *host; 5875 int i, j; 5876 5877 host = ata_host_alloc(dev, n_ports); 5878 if (!host) 5879 return NULL; 5880 5881 for (i = 0, j = 0; i < host->n_ports; i++) { 5882 struct ata_port *ap = host->ports[i]; 5883 5884 if (ppi[j]) 5885 pi = ppi[j++]; 5886 5887 ap->pio_mask = pi->pio_mask; 5888 ap->mwdma_mask = pi->mwdma_mask; 5889 ap->udma_mask = pi->udma_mask; 5890 ap->flags |= pi->flags; 5891 ap->link.flags |= pi->link_flags; 5892 ap->ops = pi->port_ops; 5893 5894 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) 5895 host->ops = pi->port_ops; 5896 } 5897 5898 return host; 5899 } 5900 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); 5901 5902 static void ata_host_stop(struct device *gendev, void *res) 5903 { 5904 struct ata_host *host = dev_get_drvdata(gendev); 5905 int i; 5906 5907 WARN_ON(!(host->flags & ATA_HOST_STARTED)); 5908 5909 for (i = 0; i < host->n_ports; i++) { 5910 struct ata_port *ap = host->ports[i]; 5911 5912 if (ap->ops->port_stop) 5913 ap->ops->port_stop(ap); 5914 } 5915 5916 if (host->ops->host_stop) 5917 host->ops->host_stop(host); 5918 } 5919 5920 /** 5921 * ata_finalize_port_ops - finalize ata_port_operations 5922 * @ops: ata_port_operations to finalize 5923 * 5924 * An ata_port_operations can inherit from another ops and that 5925 * ops can again inherit from another. This can go on as many 5926 * times as necessary as long as there is no loop in the 5927 * inheritance chain. 5928 * 5929 * Ops tables are finalized when the host is started. NULL or 5930 * unspecified entries are inherited from the closet ancestor 5931 * which has the method and the entry is populated with it. 5932 * After finalization, the ops table directly points to all the 5933 * methods and ->inherits is no longer necessary and cleared. 5934 * 5935 * Using ATA_OP_NULL, inheriting ops can force a method to NULL. 5936 * 5937 * LOCKING: 5938 * None. 5939 */ 5940 static void ata_finalize_port_ops(struct ata_port_operations *ops) 5941 { 5942 static DEFINE_SPINLOCK(lock); 5943 const struct ata_port_operations *cur; 5944 void **begin = (void **)ops; 5945 void **end = (void **)&ops->inherits; 5946 void **pp; 5947 5948 if (!ops || !ops->inherits) 5949 return; 5950 5951 spin_lock(&lock); 5952 5953 for (cur = ops->inherits; cur; cur = cur->inherits) { 5954 void **inherit = (void **)cur; 5955 5956 for (pp = begin; pp < end; pp++, inherit++) 5957 if (!*pp) 5958 *pp = *inherit; 5959 } 5960 5961 for (pp = begin; pp < end; pp++) 5962 if (IS_ERR(*pp)) 5963 *pp = NULL; 5964 5965 ops->inherits = NULL; 5966 5967 spin_unlock(&lock); 5968 } 5969 5970 /** 5971 * ata_host_start - start and freeze ports of an ATA host 5972 * @host: ATA host to start ports for 5973 * 5974 * Start and then freeze ports of @host. Started status is 5975 * recorded in host->flags, so this function can be called 5976 * multiple times. Ports are guaranteed to get started only 5977 * once. If host->ops is not initialized yet, it is set to the 5978 * first non-dummy port ops. 5979 * 5980 * LOCKING: 5981 * Inherited from calling layer (may sleep). 5982 * 5983 * RETURNS: 5984 * 0 if all ports are started successfully, -errno otherwise. 5985 */ 5986 int ata_host_start(struct ata_host *host) 5987 { 5988 int have_stop = 0; 5989 void *start_dr = NULL; 5990 int i, rc; 5991 5992 if (host->flags & ATA_HOST_STARTED) 5993 return 0; 5994 5995 ata_finalize_port_ops(host->ops); 5996 5997 for (i = 0; i < host->n_ports; i++) { 5998 struct ata_port *ap = host->ports[i]; 5999 6000 ata_finalize_port_ops(ap->ops); 6001 6002 if (!host->ops && !ata_port_is_dummy(ap)) 6003 host->ops = ap->ops; 6004 6005 if (ap->ops->port_stop) 6006 have_stop = 1; 6007 } 6008 6009 if (host->ops && host->ops->host_stop) 6010 have_stop = 1; 6011 6012 if (have_stop) { 6013 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL); 6014 if (!start_dr) 6015 return -ENOMEM; 6016 } 6017 6018 for (i = 0; i < host->n_ports; i++) { 6019 struct ata_port *ap = host->ports[i]; 6020 6021 if (ap->ops->port_start) { 6022 rc = ap->ops->port_start(ap); 6023 if (rc) { 6024 if (rc != -ENODEV) 6025 dev_err(host->dev, 6026 "failed to start port %d (errno=%d)\n", 6027 i, rc); 6028 goto err_out; 6029 } 6030 } 6031 ata_eh_freeze_port(ap); 6032 } 6033 6034 if (start_dr) 6035 devres_add(host->dev, start_dr); 6036 host->flags |= ATA_HOST_STARTED; 6037 return 0; 6038 6039 err_out: 6040 while (--i >= 0) { 6041 struct ata_port *ap = host->ports[i]; 6042 6043 if (ap->ops->port_stop) 6044 ap->ops->port_stop(ap); 6045 } 6046 devres_free(start_dr); 6047 return rc; 6048 } 6049 EXPORT_SYMBOL_GPL(ata_host_start); 6050 6051 /** 6052 * ata_host_init - Initialize a host struct for sas (ipr, libsas) 6053 * @host: host to initialize 6054 * @dev: device host is attached to 6055 * @ops: port_ops 6056 * 6057 */ 6058 void ata_host_init(struct ata_host *host, struct device *dev, 6059 struct ata_port_operations *ops) 6060 { 6061 spin_lock_init(&host->lock); 6062 mutex_init(&host->eh_mutex); 6063 host->n_tags = ATA_MAX_QUEUE; 6064 host->dev = dev; 6065 host->ops = ops; 6066 kref_init(&host->kref); 6067 } 6068 EXPORT_SYMBOL_GPL(ata_host_init); 6069 6070 void ata_port_probe(struct ata_port *ap) 6071 { 6072 struct ata_eh_info *ehi = &ap->link.eh_info; 6073 unsigned long flags; 6074 6075 ata_acpi_port_power_on(ap); 6076 6077 /* kick EH for boot probing */ 6078 spin_lock_irqsave(ap->lock, flags); 6079 6080 ehi->probe_mask |= ATA_ALL_DEVICES; 6081 ehi->action |= ATA_EH_RESET; 6082 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; 6083 6084 ap->pflags &= ~ATA_PFLAG_INITIALIZING; 6085 ap->pflags |= ATA_PFLAG_LOADING; 6086 ata_port_schedule_eh(ap); 6087 6088 spin_unlock_irqrestore(ap->lock, flags); 6089 } 6090 EXPORT_SYMBOL_GPL(ata_port_probe); 6091 6092 static void async_port_probe(void *data, async_cookie_t cookie) 6093 { 6094 struct ata_port *ap = data; 6095 6096 /* 6097 * If we're not allowed to scan this host in parallel, 6098 * we need to wait until all previous scans have completed 6099 * before going further. 6100 * Jeff Garzik says this is only within a controller, so we 6101 * don't need to wait for port 0, only for later ports. 6102 */ 6103 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0) 6104 async_synchronize_cookie(cookie); 6105 6106 ata_port_probe(ap); 6107 ata_port_wait_eh(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, const struct scsi_host_template *sht) 6132 { 6133 int i, rc; 6134 6135 host->n_tags = clamp(sht->can_queue, 1, ATA_MAX_QUEUE); 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 /* Create associated sysfs transport objects */ 6145 for (i = 0; i < host->n_ports; i++) { 6146 rc = ata_tport_add(host->dev,host->ports[i]); 6147 if (rc) { 6148 goto err_tadd; 6149 } 6150 } 6151 6152 rc = ata_scsi_add_hosts(host, sht); 6153 if (rc) 6154 goto err_tadd; 6155 6156 /* set cable, sata_spd_limit and report */ 6157 for (i = 0; i < host->n_ports; i++) { 6158 struct ata_port *ap = host->ports[i]; 6159 unsigned int xfer_mask; 6160 6161 /* set SATA cable type if still unset */ 6162 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) 6163 ap->cbl = ATA_CBL_SATA; 6164 6165 /* init sata_spd_limit to the current value */ 6166 sata_link_init_spd(&ap->link); 6167 if (ap->slave_link) 6168 sata_link_init_spd(ap->slave_link); 6169 6170 /* print per-port info to dmesg */ 6171 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, 6172 ap->udma_mask); 6173 6174 if (!ata_port_is_dummy(ap)) { 6175 ata_port_info(ap, "%cATA max %s %s\n", 6176 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', 6177 ata_mode_string(xfer_mask), 6178 ap->link.eh_info.desc); 6179 ata_ehi_clear_desc(&ap->link.eh_info); 6180 } else 6181 ata_port_info(ap, "DUMMY\n"); 6182 } 6183 6184 /* perform each probe asynchronously */ 6185 for (i = 0; i < host->n_ports; i++) { 6186 struct ata_port *ap = host->ports[i]; 6187 ap->cookie = async_schedule(async_port_probe, ap); 6188 } 6189 6190 return 0; 6191 6192 err_tadd: 6193 while (--i >= 0) { 6194 ata_tport_delete(host->ports[i]); 6195 } 6196 return rc; 6197 6198 } 6199 EXPORT_SYMBOL_GPL(ata_host_register); 6200 6201 /** 6202 * ata_host_activate - start host, request IRQ and register it 6203 * @host: target ATA host 6204 * @irq: IRQ to request 6205 * @irq_handler: irq_handler used when requesting IRQ 6206 * @irq_flags: irq_flags used when requesting IRQ 6207 * @sht: scsi_host_template to use when registering the host 6208 * 6209 * After allocating an ATA host and initializing it, most libata 6210 * LLDs perform three steps to activate the host - start host, 6211 * request IRQ and register it. This helper takes necessary 6212 * arguments and performs the three steps in one go. 6213 * 6214 * An invalid IRQ skips the IRQ registration and expects the host to 6215 * have set polling mode on the port. In this case, @irq_handler 6216 * should be NULL. 6217 * 6218 * LOCKING: 6219 * Inherited from calling layer (may sleep). 6220 * 6221 * RETURNS: 6222 * 0 on success, -errno otherwise. 6223 */ 6224 int ata_host_activate(struct ata_host *host, int irq, 6225 irq_handler_t irq_handler, unsigned long irq_flags, 6226 const struct scsi_host_template *sht) 6227 { 6228 int i, rc; 6229 char *irq_desc; 6230 6231 rc = ata_host_start(host); 6232 if (rc) 6233 return rc; 6234 6235 /* Special case for polling mode */ 6236 if (!irq) { 6237 WARN_ON(irq_handler); 6238 return ata_host_register(host, sht); 6239 } 6240 6241 irq_desc = devm_kasprintf(host->dev, GFP_KERNEL, "%s[%s]", 6242 dev_driver_string(host->dev), 6243 dev_name(host->dev)); 6244 if (!irq_desc) 6245 return -ENOMEM; 6246 6247 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, 6248 irq_desc, host); 6249 if (rc) 6250 return rc; 6251 6252 for (i = 0; i < host->n_ports; i++) 6253 ata_port_desc_misc(host->ports[i], irq); 6254 6255 rc = ata_host_register(host, sht); 6256 /* if failed, just free the IRQ and leave ports alone */ 6257 if (rc) 6258 devm_free_irq(host->dev, irq, host); 6259 6260 return rc; 6261 } 6262 EXPORT_SYMBOL_GPL(ata_host_activate); 6263 6264 /** 6265 * ata_dev_free_resources - Free a device resources 6266 * @dev: Target ATA device 6267 * 6268 * Free resources allocated to support a device features. 6269 * 6270 * LOCKING: 6271 * Kernel thread context (may sleep). 6272 */ 6273 void ata_dev_free_resources(struct ata_device *dev) 6274 { 6275 if (zpodd_dev_enabled(dev)) 6276 zpodd_exit(dev); 6277 6278 ata_dev_cleanup_cdl_resources(dev); 6279 } 6280 6281 /** 6282 * ata_port_detach - Detach ATA port in preparation of device removal 6283 * @ap: ATA port to be detached 6284 * 6285 * Detach all ATA devices and the associated SCSI devices of @ap; 6286 * then, remove the associated SCSI host. @ap is guaranteed to 6287 * be quiescent on return from this function. 6288 * 6289 * LOCKING: 6290 * Kernel thread context (may sleep). 6291 */ 6292 static void ata_port_detach(struct ata_port *ap) 6293 { 6294 unsigned long flags; 6295 struct ata_link *link; 6296 struct ata_device *dev; 6297 6298 /* Ensure ata_port probe has completed */ 6299 async_synchronize_cookie(ap->cookie + 1); 6300 6301 /* Wait for any ongoing EH */ 6302 ata_port_wait_eh(ap); 6303 6304 mutex_lock(&ap->scsi_scan_mutex); 6305 spin_lock_irqsave(ap->lock, flags); 6306 6307 /* Remove scsi devices */ 6308 ata_for_each_link(link, ap, HOST_FIRST) { 6309 ata_for_each_dev(dev, link, ALL) { 6310 if (dev->sdev) { 6311 spin_unlock_irqrestore(ap->lock, flags); 6312 scsi_remove_device(dev->sdev); 6313 spin_lock_irqsave(ap->lock, flags); 6314 dev->sdev = NULL; 6315 } 6316 } 6317 } 6318 6319 /* Tell EH to disable all devices */ 6320 ap->pflags |= ATA_PFLAG_UNLOADING; 6321 ata_port_schedule_eh(ap); 6322 6323 spin_unlock_irqrestore(ap->lock, flags); 6324 mutex_unlock(&ap->scsi_scan_mutex); 6325 6326 /* wait till EH commits suicide */ 6327 ata_port_wait_eh(ap); 6328 6329 /* It better be dead now and not have any remaining deferred qc. */ 6330 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED)); 6331 6332 cancel_delayed_work_sync(&ap->hotplug_task); 6333 cancel_delayed_work_sync(&ap->scsi_rescan_task); 6334 6335 ata_for_each_link(link, ap, PMP_FIRST) { 6336 WARN_ON(link->deferred_qc); 6337 cancel_work_sync(&link->deferred_qc_work); 6338 } 6339 6340 /* Delete port multiplier link transport devices */ 6341 if (ap->pmp_link) { 6342 int i; 6343 6344 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 6345 ata_tlink_delete(&ap->pmp_link[i]); 6346 } 6347 6348 /* Remove the associated SCSI host */ 6349 scsi_remove_host(ap->scsi_host); 6350 ata_tport_delete(ap); 6351 } 6352 6353 /** 6354 * ata_host_detach - Detach all ports of an ATA host 6355 * @host: Host to detach 6356 * 6357 * Detach all ports of @host. 6358 * 6359 * LOCKING: 6360 * Kernel thread context (may sleep). 6361 */ 6362 void ata_host_detach(struct ata_host *host) 6363 { 6364 int i; 6365 6366 for (i = 0; i < host->n_ports; i++) 6367 ata_port_detach(host->ports[i]); 6368 6369 /* the host is dead now, dissociate ACPI */ 6370 ata_acpi_dissociate(host); 6371 } 6372 EXPORT_SYMBOL_GPL(ata_host_detach); 6373 6374 #ifdef CONFIG_PCI 6375 6376 /** 6377 * ata_pci_remove_one - PCI layer callback for device removal 6378 * @pdev: PCI device that was removed 6379 * 6380 * PCI layer indicates to libata via this hook that hot-unplug or 6381 * module unload event has occurred. Detach all ports. Resource 6382 * release is handled via devres. 6383 * 6384 * LOCKING: 6385 * Inherited from PCI layer (may sleep). 6386 */ 6387 void ata_pci_remove_one(struct pci_dev *pdev) 6388 { 6389 struct ata_host *host = pci_get_drvdata(pdev); 6390 6391 ata_host_detach(host); 6392 } 6393 EXPORT_SYMBOL_GPL(ata_pci_remove_one); 6394 6395 void ata_pci_shutdown_one(struct pci_dev *pdev) 6396 { 6397 struct ata_host *host = pci_get_drvdata(pdev); 6398 int i; 6399 6400 for (i = 0; i < host->n_ports; i++) { 6401 struct ata_port *ap = host->ports[i]; 6402 6403 ap->pflags |= ATA_PFLAG_FROZEN; 6404 6405 /* Disable port interrupts */ 6406 if (ap->ops->freeze) 6407 ap->ops->freeze(ap); 6408 6409 /* Stop the port DMA engines */ 6410 if (ap->ops->port_stop) 6411 ap->ops->port_stop(ap); 6412 } 6413 } 6414 EXPORT_SYMBOL_GPL(ata_pci_shutdown_one); 6415 6416 /* move to PCI subsystem */ 6417 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) 6418 { 6419 unsigned long tmp = 0; 6420 6421 switch (bits->width) { 6422 case 1: { 6423 u8 tmp8 = 0; 6424 pci_read_config_byte(pdev, bits->reg, &tmp8); 6425 tmp = tmp8; 6426 break; 6427 } 6428 case 2: { 6429 u16 tmp16 = 0; 6430 pci_read_config_word(pdev, bits->reg, &tmp16); 6431 tmp = tmp16; 6432 break; 6433 } 6434 case 4: { 6435 u32 tmp32 = 0; 6436 pci_read_config_dword(pdev, bits->reg, &tmp32); 6437 tmp = tmp32; 6438 break; 6439 } 6440 6441 default: 6442 return -EINVAL; 6443 } 6444 6445 tmp &= bits->mask; 6446 6447 return (tmp == bits->val) ? 1 : 0; 6448 } 6449 EXPORT_SYMBOL_GPL(pci_test_config_bits); 6450 6451 #ifdef CONFIG_PM 6452 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) 6453 { 6454 pci_save_state(pdev); 6455 pci_disable_device(pdev); 6456 6457 if (mesg.event & PM_EVENT_SLEEP) 6458 pci_set_power_state(pdev, PCI_D3hot); 6459 } 6460 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); 6461 6462 int ata_pci_device_do_resume(struct pci_dev *pdev) 6463 { 6464 int rc; 6465 6466 pci_set_power_state(pdev, PCI_D0); 6467 pci_restore_state(pdev); 6468 6469 rc = pcim_enable_device(pdev); 6470 if (rc) { 6471 dev_err(&pdev->dev, 6472 "failed to enable device after resume (%d)\n", rc); 6473 return rc; 6474 } 6475 6476 pci_set_master(pdev); 6477 return 0; 6478 } 6479 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); 6480 6481 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) 6482 { 6483 struct ata_host *host = pci_get_drvdata(pdev); 6484 6485 ata_host_suspend(host, mesg); 6486 6487 ata_pci_device_do_suspend(pdev, mesg); 6488 6489 return 0; 6490 } 6491 EXPORT_SYMBOL_GPL(ata_pci_device_suspend); 6492 6493 int ata_pci_device_resume(struct pci_dev *pdev) 6494 { 6495 struct ata_host *host = pci_get_drvdata(pdev); 6496 int rc; 6497 6498 rc = ata_pci_device_do_resume(pdev); 6499 if (rc == 0) 6500 ata_host_resume(host); 6501 return rc; 6502 } 6503 EXPORT_SYMBOL_GPL(ata_pci_device_resume); 6504 #endif /* CONFIG_PM */ 6505 #endif /* CONFIG_PCI */ 6506 6507 /** 6508 * ata_platform_remove_one - Platform layer callback for device removal 6509 * @pdev: Platform device that was removed 6510 * 6511 * Platform layer indicates to libata via this hook that hot-unplug or 6512 * module unload event has occurred. Detach all ports. Resource 6513 * release is handled via devres. 6514 * 6515 * LOCKING: 6516 * Inherited from platform layer (may sleep). 6517 */ 6518 void ata_platform_remove_one(struct platform_device *pdev) 6519 { 6520 struct ata_host *host = platform_get_drvdata(pdev); 6521 6522 ata_host_detach(host); 6523 } 6524 EXPORT_SYMBOL_GPL(ata_platform_remove_one); 6525 6526 #ifdef CONFIG_ATA_FORCE 6527 6528 #define force_cbl(name, flag) \ 6529 { #name, .cbl = (flag) } 6530 6531 #define force_spd_limit(spd, val) \ 6532 { #spd, .spd_limit = (val) } 6533 6534 #define force_xfer(mode, shift) \ 6535 { #mode, .xfer_mask = (1UL << (shift)) } 6536 6537 #define force_lflag_on(name, flags) \ 6538 { #name, .lflags_on = (flags) } 6539 6540 #define force_lflag_onoff(name, flags) \ 6541 { "no" #name, .lflags_on = (flags) }, \ 6542 { #name, .lflags_off = (flags) } 6543 6544 #define force_pflag_on(name, flags) \ 6545 { #name, .pflags_on = (flags) } 6546 6547 #define force_quirk_on(name, flag) \ 6548 { #name, .quirk_on = (flag) } 6549 6550 #define force_quirk_val(name, flag, val) \ 6551 { #name, .quirk_on = (flag), \ 6552 .value = (val) } 6553 6554 #define force_quirk_onoff(name, flag) \ 6555 { "no" #name, .quirk_on = (flag) }, \ 6556 { #name, .quirk_off = (flag) } 6557 6558 /* 6559 * If the ata_force_param struct member 'name' ends with '=', then the value 6560 * after the equal sign will be parsed as an u64, and will be saved in the 6561 * ata_force_param struct member 'value'. This works because each libata.force 6562 * entry (struct ata_force_ent) is separated by commas, so each entry represents 6563 * a single quirk, and can thus only have a single value. 6564 */ 6565 static const struct ata_force_param force_tbl[] __initconst = { 6566 force_cbl(40c, ATA_CBL_PATA40), 6567 force_cbl(80c, ATA_CBL_PATA80), 6568 force_cbl(short40c, ATA_CBL_PATA40_SHORT), 6569 force_cbl(unk, ATA_CBL_PATA_UNK), 6570 force_cbl(ign, ATA_CBL_PATA_IGN), 6571 force_cbl(sata, ATA_CBL_SATA), 6572 6573 force_spd_limit(1.5Gbps, 1), 6574 force_spd_limit(3.0Gbps, 2), 6575 6576 force_xfer(pio0, ATA_SHIFT_PIO + 0), 6577 force_xfer(pio1, ATA_SHIFT_PIO + 1), 6578 force_xfer(pio2, ATA_SHIFT_PIO + 2), 6579 force_xfer(pio3, ATA_SHIFT_PIO + 3), 6580 force_xfer(pio4, ATA_SHIFT_PIO + 4), 6581 force_xfer(pio5, ATA_SHIFT_PIO + 5), 6582 force_xfer(pio6, ATA_SHIFT_PIO + 6), 6583 force_xfer(mwdma0, ATA_SHIFT_MWDMA + 0), 6584 force_xfer(mwdma1, ATA_SHIFT_MWDMA + 1), 6585 force_xfer(mwdma2, ATA_SHIFT_MWDMA + 2), 6586 force_xfer(mwdma3, ATA_SHIFT_MWDMA + 3), 6587 force_xfer(mwdma4, ATA_SHIFT_MWDMA + 4), 6588 force_xfer(udma0, ATA_SHIFT_UDMA + 0), 6589 force_xfer(udma16, ATA_SHIFT_UDMA + 0), 6590 force_xfer(udma/16, ATA_SHIFT_UDMA + 0), 6591 force_xfer(udma1, ATA_SHIFT_UDMA + 1), 6592 force_xfer(udma25, ATA_SHIFT_UDMA + 1), 6593 force_xfer(udma/25, ATA_SHIFT_UDMA + 1), 6594 force_xfer(udma2, ATA_SHIFT_UDMA + 2), 6595 force_xfer(udma33, ATA_SHIFT_UDMA + 2), 6596 force_xfer(udma/33, ATA_SHIFT_UDMA + 2), 6597 force_xfer(udma3, ATA_SHIFT_UDMA + 3), 6598 force_xfer(udma44, ATA_SHIFT_UDMA + 3), 6599 force_xfer(udma/44, ATA_SHIFT_UDMA + 3), 6600 force_xfer(udma4, ATA_SHIFT_UDMA + 4), 6601 force_xfer(udma66, ATA_SHIFT_UDMA + 4), 6602 force_xfer(udma/66, ATA_SHIFT_UDMA + 4), 6603 force_xfer(udma5, ATA_SHIFT_UDMA + 5), 6604 force_xfer(udma100, ATA_SHIFT_UDMA + 5), 6605 force_xfer(udma/100, ATA_SHIFT_UDMA + 5), 6606 force_xfer(udma6, ATA_SHIFT_UDMA + 6), 6607 force_xfer(udma133, ATA_SHIFT_UDMA + 6), 6608 force_xfer(udma/133, ATA_SHIFT_UDMA + 6), 6609 force_xfer(udma7, ATA_SHIFT_UDMA + 7), 6610 6611 force_lflag_on(nohrst, ATA_LFLAG_NO_HRST), 6612 force_lflag_on(nosrst, ATA_LFLAG_NO_SRST), 6613 force_lflag_on(norst, ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST), 6614 force_lflag_on(rstonce, ATA_LFLAG_RST_ONCE), 6615 force_lflag_onoff(dbdelay, ATA_LFLAG_NO_DEBOUNCE_DELAY), 6616 6617 force_pflag_on(external, ATA_PFLAG_EXTERNAL), 6618 6619 force_quirk_onoff(ncq, ATA_QUIRK_NONCQ), 6620 force_quirk_onoff(ncqtrim, ATA_QUIRK_NO_NCQ_TRIM), 6621 force_quirk_onoff(ncqati, ATA_QUIRK_NO_NCQ_ON_ATI), 6622 6623 force_quirk_onoff(trim, ATA_QUIRK_NOTRIM), 6624 force_quirk_on(trim_zero, ATA_QUIRK_ZERO_AFTER_TRIM), 6625 force_quirk_on(max_trim_128m, ATA_QUIRK_MAX_TRIM_128M), 6626 6627 force_quirk_onoff(dma, ATA_QUIRK_NODMA), 6628 force_quirk_on(atapi_dmadir, ATA_QUIRK_ATAPI_DMADIR), 6629 force_quirk_on(atapi_mod16_dma, ATA_QUIRK_ATAPI_MOD16_DMA), 6630 6631 force_quirk_onoff(dmalog, ATA_QUIRK_NO_DMA_LOG), 6632 force_quirk_onoff(iddevlog, ATA_QUIRK_NO_ID_DEV_LOG), 6633 force_quirk_onoff(logdir, ATA_QUIRK_NO_LOG_DIR), 6634 6635 force_quirk_val(max_sec_128, ATA_QUIRK_MAX_SEC, 128), 6636 force_quirk_val(max_sec_1024, ATA_QUIRK_MAX_SEC, 1024), 6637 force_quirk_on(max_sec=, ATA_QUIRK_MAX_SEC), 6638 force_quirk_on(max_sec_lba48, ATA_QUIRK_MAX_SEC_LBA48), 6639 6640 force_quirk_onoff(lpm, ATA_QUIRK_NOLPM), 6641 force_quirk_onoff(setxfer, ATA_QUIRK_NOSETXFER), 6642 force_quirk_on(dump_id, ATA_QUIRK_DUMP_ID), 6643 force_quirk_onoff(fua, ATA_QUIRK_NO_FUA), 6644 6645 force_quirk_on(disable, ATA_QUIRK_DISABLE), 6646 }; 6647 6648 static int __init ata_parse_force_one(char **cur, 6649 struct ata_force_ent *force_ent, 6650 const char **reason) 6651 { 6652 char *start = *cur, *p = *cur; 6653 char *id, *val, *endp, *equalsign, *char_after_equalsign; 6654 const struct ata_force_param *match_fp = NULL; 6655 u64 val_after_equalsign; 6656 int nr_matches = 0, i; 6657 6658 /* find where this param ends and update *cur */ 6659 while (*p != '\0' && *p != ',') 6660 p++; 6661 6662 if (*p == '\0') 6663 *cur = p; 6664 else 6665 *cur = p + 1; 6666 6667 *p = '\0'; 6668 6669 /* parse */ 6670 p = strchr(start, ':'); 6671 if (!p) { 6672 val = strstrip(start); 6673 goto parse_val; 6674 } 6675 *p = '\0'; 6676 6677 id = strstrip(start); 6678 val = strstrip(p + 1); 6679 6680 /* parse id */ 6681 p = strchr(id, '.'); 6682 if (p) { 6683 *p++ = '\0'; 6684 force_ent->device = simple_strtoul(p, &endp, 10); 6685 if (p == endp || *endp != '\0') { 6686 *reason = "invalid device"; 6687 return -EINVAL; 6688 } 6689 } 6690 6691 force_ent->port = simple_strtoul(id, &endp, 10); 6692 if (id == endp || *endp != '\0') { 6693 *reason = "invalid port/link"; 6694 return -EINVAL; 6695 } 6696 6697 parse_val: 6698 equalsign = strchr(val, '='); 6699 if (equalsign) { 6700 char_after_equalsign = equalsign + 1; 6701 if (!strlen(char_after_equalsign) || 6702 kstrtoull(char_after_equalsign, 10, &val_after_equalsign)) { 6703 *reason = "invalid value after equal sign"; 6704 return -EINVAL; 6705 } 6706 } 6707 6708 /* Parse the parameter value. */ 6709 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) { 6710 const struct ata_force_param *fp = &force_tbl[i]; 6711 6712 /* 6713 * If val contains equal sign, match has to be exact, i.e. 6714 * shortcuts are not supported. 6715 */ 6716 if (equalsign && 6717 (strncasecmp(val, fp->name, 6718 char_after_equalsign - val) == 0)) { 6719 force_ent->param = *fp; 6720 force_ent->param.value = val_after_equalsign; 6721 return 0; 6722 } 6723 6724 /* 6725 * If val does not contain equal sign, allow shortcuts so that 6726 * both 1.5 and 1.5Gbps work. 6727 */ 6728 if (strncasecmp(val, fp->name, strlen(val))) 6729 continue; 6730 6731 nr_matches++; 6732 match_fp = fp; 6733 6734 if (strcasecmp(val, fp->name) == 0) { 6735 nr_matches = 1; 6736 break; 6737 } 6738 } 6739 6740 if (!nr_matches) { 6741 *reason = "unknown value"; 6742 return -EINVAL; 6743 } 6744 if (nr_matches > 1) { 6745 *reason = "ambiguous value"; 6746 return -EINVAL; 6747 } 6748 6749 force_ent->param = *match_fp; 6750 6751 return 0; 6752 } 6753 6754 static void __init ata_parse_force_param(void) 6755 { 6756 int idx = 0, size = 1; 6757 int last_port = -1, last_device = -1; 6758 char *p, *cur, *next; 6759 6760 /* Calculate maximum number of params and allocate ata_force_tbl */ 6761 for (p = ata_force_param_buf; *p; p++) 6762 if (*p == ',') 6763 size++; 6764 6765 ata_force_tbl = kzalloc_objs(ata_force_tbl[0], size); 6766 if (!ata_force_tbl) { 6767 printk(KERN_WARNING "ata: failed to extend force table, " 6768 "libata.force ignored\n"); 6769 return; 6770 } 6771 6772 /* parse and populate the table */ 6773 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) { 6774 const char *reason = ""; 6775 struct ata_force_ent te = { .port = -1, .device = -1 }; 6776 6777 next = cur; 6778 if (ata_parse_force_one(&next, &te, &reason)) { 6779 printk(KERN_WARNING "ata: failed to parse force " 6780 "parameter \"%s\" (%s)\n", 6781 cur, reason); 6782 continue; 6783 } 6784 6785 if (te.port == -1) { 6786 te.port = last_port; 6787 te.device = last_device; 6788 } 6789 6790 ata_force_tbl[idx++] = te; 6791 6792 last_port = te.port; 6793 last_device = te.device; 6794 } 6795 6796 ata_force_tbl_size = idx; 6797 } 6798 6799 static void ata_free_force_param(void) 6800 { 6801 kfree(ata_force_tbl); 6802 } 6803 #else 6804 static inline void ata_parse_force_param(void) { } 6805 static inline void ata_free_force_param(void) { } 6806 #endif 6807 6808 static int __init ata_init(void) 6809 { 6810 int rc; 6811 6812 ata_parse_force_param(); 6813 6814 rc = ata_sff_init(); 6815 if (rc) { 6816 ata_free_force_param(); 6817 return rc; 6818 } 6819 6820 libata_transport_init(); 6821 6822 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); 6823 6824 return 0; 6825 } 6826 6827 static void __exit ata_exit(void) 6828 { 6829 libata_transport_exit(); 6830 ata_sff_exit(); 6831 ata_free_force_param(); 6832 } 6833 6834 subsys_initcall(ata_init); 6835 module_exit(ata_exit); 6836 6837 static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1); 6838 6839 int ata_ratelimit(void) 6840 { 6841 return __ratelimit(&ratelimit); 6842 } 6843 EXPORT_SYMBOL_GPL(ata_ratelimit); 6844 6845 /** 6846 * ata_msleep - ATA EH owner aware msleep 6847 * @ap: ATA port to attribute the sleep to 6848 * @msecs: duration to sleep in milliseconds 6849 * 6850 * Sleeps @msecs. If the current task is owner of @ap's EH, the 6851 * ownership is released before going to sleep and reacquired 6852 * after the sleep is complete. IOW, other ports sharing the 6853 * @ap->host will be allowed to own the EH while this task is 6854 * sleeping. 6855 * 6856 * LOCKING: 6857 * Might sleep. 6858 */ 6859 void ata_msleep(struct ata_port *ap, unsigned int msecs) 6860 __context_unsafe(conditional locking) 6861 { 6862 bool owns_eh = ap && ap->host->eh_owner == current; 6863 6864 if (owns_eh) 6865 ata_eh_release(ap); 6866 6867 if (msecs < 20) { 6868 unsigned long usecs = msecs * USEC_PER_MSEC; 6869 usleep_range(usecs, usecs + 50); 6870 } else { 6871 msleep(msecs); 6872 } 6873 6874 if (owns_eh) 6875 ata_eh_acquire(ap); 6876 } 6877 EXPORT_SYMBOL_GPL(ata_msleep); 6878 6879 /** 6880 * ata_wait_register - wait until register value changes 6881 * @ap: ATA port to wait register for, can be NULL 6882 * @reg: IO-mapped register 6883 * @mask: Mask to apply to read register value 6884 * @val: Wait condition 6885 * @interval: polling interval in milliseconds 6886 * @timeout: timeout in milliseconds 6887 * 6888 * Waiting for some bits of register to change is a common 6889 * operation for ATA controllers. This function reads 32bit LE 6890 * IO-mapped register @reg and tests for the following condition. 6891 * 6892 * (*@reg & mask) != val 6893 * 6894 * If the condition is met, it returns; otherwise, the process is 6895 * repeated after @interval_msec until timeout. 6896 * 6897 * LOCKING: 6898 * Kernel thread context (may sleep) 6899 * 6900 * RETURNS: 6901 * The final register value. 6902 */ 6903 u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val, 6904 unsigned int interval, unsigned int timeout) 6905 { 6906 unsigned long deadline; 6907 u32 tmp; 6908 6909 tmp = ioread32(reg); 6910 6911 /* Calculate timeout _after_ the first read to make sure 6912 * preceding writes reach the controller before starting to 6913 * eat away the timeout. 6914 */ 6915 deadline = ata_deadline(jiffies, timeout); 6916 6917 while ((tmp & mask) == val && time_before(jiffies, deadline)) { 6918 ata_msleep(ap, interval); 6919 tmp = ioread32(reg); 6920 } 6921 6922 return tmp; 6923 } 6924 EXPORT_SYMBOL_GPL(ata_wait_register); 6925 6926 /* 6927 * Dummy port_ops 6928 */ 6929 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) 6930 { 6931 return AC_ERR_SYSTEM; 6932 } 6933 6934 static void ata_dummy_error_handler(struct ata_port *ap) 6935 __must_hold(&ap->host->eh_mutex) 6936 { 6937 /* truly dummy */ 6938 } 6939 6940 struct ata_port_operations ata_dummy_port_ops = { 6941 .qc_issue = ata_dummy_qc_issue, 6942 .error_handler = ata_dummy_error_handler, 6943 .sched_eh = ata_std_sched_eh, 6944 .end_eh = ata_std_end_eh, 6945 }; 6946 EXPORT_SYMBOL_GPL(ata_dummy_port_ops); 6947 6948 const struct ata_port_info ata_dummy_port_info = { 6949 .port_ops = &ata_dummy_port_ops, 6950 }; 6951 EXPORT_SYMBOL_GPL(ata_dummy_port_info); 6952 6953 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_tf_load); 6954 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_exec_command); 6955 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_setup); 6956 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_start); 6957 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_status); 6958