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) || ata_id_is_locked(dev->id)) 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_zoned(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_zoned(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 void ata_dev_config_depop(struct ata_device *dev) 2709 { 2710 unsigned int err_mask; 2711 u64 val; 2712 2713 /* Ignore old drives. */ 2714 if (ata_id_major_version(dev->id) < 11) 2715 goto not_supported; 2716 2717 /* NCQ Autosense is required. */ 2718 if (!ata_identify_page_supported(dev, ATA_LOG_SUPPORTED_CAPABILITIES) || 2719 !ata_id_has_ncq_autosense(dev->id)) 2720 goto not_supported; 2721 2722 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 2723 ATA_LOG_SUPPORTED_CAPABILITIES, 2724 dev->sector_buf, 1); 2725 if (err_mask) 2726 goto not_supported; 2727 2728 /* Check depopulation capabilities bits. */ 2729 val = get_unaligned_le64(&dev->sector_buf[152]); 2730 if (!(val & BIT_ULL(63))) 2731 goto not_supported; 2732 2733 /* 2734 * Support for at least the GET PHYSICAL ELEMENT STATUS and 2735 * REMOVE ELEMENT AND TRUNCATE commands is mandated. 2736 */ 2737 if (!(val & BIT_ULL(0)) || !(val & BIT_ULL(1))) 2738 goto not_supported; 2739 2740 dev->flags |= ATA_DFLAG_DEPOP; 2741 2742 /* Check if RESTORE ELEMENTS AND REBUILD is supported. */ 2743 if (val & BIT_ULL(2)) 2744 dev->flags |= ATA_DFLAG_DEPOP_RESTORE; 2745 2746 /* 2747 * For ZAC devices, check if REMOVE ELEMENT AND MODIFY ZONES is 2748 * supported. 2749 */ 2750 if (dev->class != ATA_DEV_ZAC) 2751 return; 2752 2753 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 2754 ATA_LOG_ZONED_INFORMATION, 2755 dev->sector_buf, 1); 2756 if (err_mask) 2757 return; 2758 2759 val = get_unaligned_le64(&dev->sector_buf[8]); 2760 if (!(val & BIT_ULL(63))) 2761 return; 2762 2763 if (val & BIT_ULL(1)) 2764 dev->flags |= ATA_DFLAG_DEPOP_MODIFY; 2765 2766 return; 2767 2768 not_supported: 2769 dev->flags &= ~(ATA_DFLAG_DEPOP | ATA_DFLAG_DEPOP_RESTORE | 2770 ATA_DFLAG_DEPOP_MODIFY); 2771 } 2772 2773 static int ata_dev_config_lba(struct ata_device *dev) 2774 { 2775 const u16 *id = dev->id; 2776 const char *lba_desc; 2777 char ncq_desc[32]; 2778 int ret; 2779 2780 dev->flags |= ATA_DFLAG_LBA; 2781 2782 if (ata_id_has_lba48(id)) { 2783 lba_desc = "LBA48"; 2784 dev->flags |= ATA_DFLAG_LBA48; 2785 if (dev->n_sectors >= (1UL << 28) && 2786 ata_id_has_flush_ext(id)) 2787 dev->flags |= ATA_DFLAG_FLUSH_EXT; 2788 } else { 2789 lba_desc = "LBA"; 2790 } 2791 2792 /* config NCQ */ 2793 ret = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); 2794 2795 /* print device info to dmesg */ 2796 if (ata_dev_print_info(dev)) 2797 ata_dev_info(dev, 2798 "%llu sectors, multi %u: %s %s\n", 2799 (unsigned long long)dev->n_sectors, 2800 dev->multi_count, lba_desc, ncq_desc); 2801 2802 return ret; 2803 } 2804 2805 static void ata_dev_config_chs(struct ata_device *dev) 2806 { 2807 const u16 *id = dev->id; 2808 2809 if (ata_id_current_chs_valid(id)) { 2810 /* Current CHS translation is valid. */ 2811 dev->cylinders = id[54]; 2812 dev->heads = id[55]; 2813 dev->sectors = id[56]; 2814 } else { 2815 /* Default translation */ 2816 dev->cylinders = id[1]; 2817 dev->heads = id[3]; 2818 dev->sectors = id[6]; 2819 } 2820 2821 /* print device info to dmesg */ 2822 if (ata_dev_print_info(dev)) 2823 ata_dev_info(dev, 2824 "%llu sectors, multi %u, CHS %u/%u/%u\n", 2825 (unsigned long long)dev->n_sectors, 2826 dev->multi_count, dev->cylinders, 2827 dev->heads, dev->sectors); 2828 } 2829 2830 static void ata_dev_config_fua(struct ata_device *dev) 2831 { 2832 /* Ignore FUA support if its use is disabled globally */ 2833 if (!libata_fua) 2834 goto nofua; 2835 2836 /* Ignore devices without support for WRITE DMA FUA EXT */ 2837 if (!(dev->flags & ATA_DFLAG_LBA48) || !ata_id_has_fua(dev->id)) 2838 goto nofua; 2839 2840 /* Ignore known bad devices and devices that lack NCQ support */ 2841 if (!ata_ncq_supported(dev) || (dev->quirks & ATA_QUIRK_NO_FUA)) 2842 goto nofua; 2843 2844 dev->flags |= ATA_DFLAG_FUA; 2845 2846 return; 2847 2848 nofua: 2849 dev->flags &= ~ATA_DFLAG_FUA; 2850 } 2851 2852 static void ata_dev_config_devslp(struct ata_device *dev) 2853 { 2854 u8 *sata_setting = dev->sector_buf; 2855 unsigned int err_mask; 2856 int i, j; 2857 2858 /* 2859 * Check device sleep capability. Get DevSlp timing variables 2860 * from SATA Settings page of Identify Device Data Log. 2861 */ 2862 if (!ata_id_has_devslp(dev->id) || 2863 !ata_identify_page_supported(dev, ATA_LOG_SATA_SETTINGS)) 2864 return; 2865 2866 err_mask = ata_read_log_page(dev, 2867 ATA_LOG_IDENTIFY_DEVICE, 2868 ATA_LOG_SATA_SETTINGS, 2869 sata_setting, 1); 2870 if (err_mask) 2871 return; 2872 2873 dev->flags |= ATA_DFLAG_DEVSLP; 2874 for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) { 2875 j = ATA_LOG_DEVSLP_OFFSET + i; 2876 dev->devslp_timing[i] = sata_setting[j]; 2877 } 2878 } 2879 2880 static void ata_dev_config_cpr(struct ata_device *dev) 2881 { 2882 unsigned int err_mask; 2883 size_t buf_len; 2884 int i, nr_cpr = 0; 2885 struct ata_cpr_log *cpr_log = NULL; 2886 u8 *desc, *buf = NULL; 2887 2888 if (ata_id_major_version(dev->id) < 11) 2889 goto out; 2890 2891 buf_len = ata_log_supported(dev, ATA_LOG_CONCURRENT_POSITIONING_RANGES); 2892 if (buf_len == 0) 2893 goto out; 2894 2895 /* 2896 * Read the concurrent positioning ranges log (0x47). We can have at 2897 * most 255 32B range descriptors plus a 64B header. This log varies in 2898 * size, so use the size reported in the GPL directory. Reading beyond 2899 * the supported length will result in an error. 2900 */ 2901 buf_len <<= 9; 2902 buf = kzalloc(buf_len, GFP_KERNEL); 2903 if (!buf) 2904 goto out; 2905 2906 err_mask = ata_read_log_page(dev, ATA_LOG_CONCURRENT_POSITIONING_RANGES, 2907 0, buf, buf_len >> 9); 2908 if (err_mask) 2909 goto out; 2910 2911 nr_cpr = buf[0]; 2912 if (!nr_cpr) 2913 goto out; 2914 2915 /* 2916 * The device reports the number of CPR descriptors independently of the 2917 * log size, and that count is also used to emit VPD page B9h into the 2918 * fixed-size rbuf. Reject a count larger than what that buffer can hold 2919 * (ATA_DEV_MAX_CPR) or larger than the log the device actually returned. 2920 */ 2921 if (nr_cpr > ATA_DEV_MAX_CPR) { 2922 ata_dev_warn(dev, 2923 "Too many concurrent positioning ranges\n"); 2924 goto out; 2925 } 2926 2927 if (buf_len < 64 + (size_t)nr_cpr * 32) { 2928 ata_dev_warn(dev, 2929 "Invalid number of concurrent positioning ranges\n"); 2930 goto out; 2931 } 2932 2933 cpr_log = kzalloc_flex(*cpr_log, cpr, nr_cpr); 2934 if (!cpr_log) 2935 goto out; 2936 2937 cpr_log->nr_cpr = nr_cpr; 2938 desc = &buf[64]; 2939 for (i = 0; i < nr_cpr; i++, desc += 32) { 2940 cpr_log->cpr[i].num = desc[0]; 2941 cpr_log->cpr[i].num_storage_elements = desc[1]; 2942 cpr_log->cpr[i].start_lba = get_unaligned_le64(&desc[8]); 2943 cpr_log->cpr[i].num_lbas = get_unaligned_le64(&desc[16]); 2944 } 2945 2946 out: 2947 swap(dev->cpr_log, cpr_log); 2948 kfree(cpr_log); 2949 kfree(buf); 2950 } 2951 2952 /* 2953 * Configure features related to link power management. 2954 */ 2955 static void ata_dev_config_lpm(struct ata_device *dev) 2956 { 2957 struct ata_port *ap = dev->link->ap; 2958 unsigned int err_mask; 2959 2960 if (ap->flags & ATA_FLAG_NO_LPM) { 2961 /* 2962 * When the port does not support LPM, we cannot support it on 2963 * the device either. 2964 */ 2965 dev->quirks |= ATA_QUIRK_NOLPM; 2966 } else { 2967 /* 2968 * Some WD SATA-1 drives have issues with LPM, turn on NOLPM for 2969 * them. 2970 */ 2971 if ((dev->quirks & ATA_QUIRK_WD_BROKEN_LPM) && 2972 (dev->id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2) 2973 dev->quirks |= ATA_QUIRK_NOLPM; 2974 2975 /* ATI specific quirk */ 2976 if ((dev->quirks & ATA_QUIRK_NO_LPM_ON_ATI) && 2977 ata_dev_check_adapter(dev, PCI_VENDOR_ID_ATI)) 2978 dev->quirks |= ATA_QUIRK_NOLPM; 2979 } 2980 2981 if (dev->quirks & ATA_QUIRK_NOLPM && 2982 ap->target_lpm_policy != ATA_LPM_MAX_POWER) { 2983 ata_dev_warn(dev, "LPM support broken, forcing max_power\n"); 2984 ap->target_lpm_policy = ATA_LPM_MAX_POWER; 2985 } 2986 2987 /* 2988 * Device Initiated Power Management (DIPM) is normally disabled by 2989 * default on a device. However, DIPM may have been enabled and that 2990 * setting kept even after COMRESET because of the Software Settings 2991 * Preservation feature. So if the port does not support DIPM and the 2992 * device does, disable DIPM on the device. 2993 */ 2994 if (ap->flags & ATA_FLAG_NO_DIPM && ata_id_has_dipm(dev->id)) { 2995 err_mask = ata_dev_set_feature(dev, 2996 SETFEATURES_SATA_DISABLE, SATA_DIPM); 2997 if (err_mask && err_mask != AC_ERR_DEV) 2998 ata_dev_err(dev, "Disable DIPM failed, Emask 0x%x\n", 2999 err_mask); 3000 } 3001 } 3002 3003 static void ata_dev_print_features(struct ata_device *dev) 3004 { 3005 if (!(dev->flags & ATA_DFLAG_FEATURES_MASK) && !dev->cpr_log && 3006 !ata_id_has_hipm(dev->id) && !ata_id_has_dipm(dev->id)) 3007 return; 3008 3009 ata_dev_info(dev, 3010 "Features:%s%s%s%s%s%s%s%s%s%s%s%s%s\n", 3011 dev->flags & ATA_DFLAG_FUA ? " FUA" : "", 3012 dev->flags & ATA_DFLAG_TRUSTED ? " Trust" : "", 3013 dev->flags & ATA_DFLAG_DA ? " Dev-Attention" : "", 3014 dev->flags & ATA_DFLAG_DEVSLP ? " Dev-Sleep" : "", 3015 ata_id_has_hipm(dev->id) ? " HIPM" : "", 3016 ata_id_has_dipm(dev->id) ? " DIPM" : "", 3017 dev->flags & ATA_DFLAG_NCQ_SEND_RECV ? " NCQ-sndrcv" : "", 3018 dev->flags & ATA_DFLAG_NCQ_PRIO ? " NCQ-prio" : "", 3019 dev->flags & ATA_DFLAG_CDL ? " CDL" : "", 3020 dev->cpr_log ? " CPR" : "", 3021 dev->flags & ATA_DFLAG_DEPOP ? " Depop" : "", 3022 dev->flags & ATA_DFLAG_DEPOP_RESTORE ? " Depop-Restore" : "", 3023 dev->flags & ATA_DFLAG_DEPOP_MODIFY ? " Depop-Modify" : ""); 3024 } 3025 3026 /** 3027 * ata_dev_configure - Configure the specified ATA/ATAPI device 3028 * @dev: Target device to configure 3029 * 3030 * Configure @dev according to @dev->id. Generic and low-level 3031 * driver specific fixups are also applied. 3032 * 3033 * LOCKING: 3034 * Kernel thread context (may sleep) 3035 * 3036 * RETURNS: 3037 * 0 on success, -errno otherwise 3038 */ 3039 int ata_dev_configure(struct ata_device *dev) 3040 { 3041 struct ata_port *ap = dev->link->ap; 3042 bool print_info = ata_dev_print_info(dev); 3043 const u16 *id = dev->id; 3044 unsigned int xfer_mask; 3045 unsigned int err_mask; 3046 char revbuf[7]; /* XYZ-99\0 */ 3047 char fwrevbuf[ATA_ID_FW_REV_LEN+1]; 3048 char modelbuf[ATA_ID_PROD_LEN+1]; 3049 int rc; 3050 3051 if (!ata_dev_enabled(dev)) { 3052 ata_dev_dbg(dev, "no device\n"); 3053 return 0; 3054 } 3055 3056 /* Clear the general purpose log directory cache. */ 3057 ata_clear_log_directory(dev); 3058 3059 /* Set quirks */ 3060 dev->quirks |= ata_dev_quirks(dev); 3061 ata_force_quirks(dev); 3062 3063 if (dev->quirks & ATA_QUIRK_DISABLE) { 3064 ata_dev_info(dev, "unsupported device, disabling\n"); 3065 ata_dev_disable(dev); 3066 return 0; 3067 } 3068 3069 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) && 3070 dev->class == ATA_DEV_ATAPI) { 3071 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n", 3072 atapi_enabled ? "not supported with this driver" 3073 : "disabled"); 3074 ata_dev_disable(dev); 3075 return 0; 3076 } 3077 3078 rc = ata_do_link_spd_quirk(dev); 3079 if (rc) 3080 return rc; 3081 3082 /* let ACPI work its magic */ 3083 rc = ata_acpi_on_devcfg(dev); 3084 if (rc) 3085 return rc; 3086 3087 /* massage HPA, do it early as it might change IDENTIFY data */ 3088 rc = ata_hpa_resize(dev); 3089 if (rc) 3090 return rc; 3091 3092 /* print device capabilities */ 3093 ata_dev_dbg(dev, 3094 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " 3095 "85:%04x 86:%04x 87:%04x 88:%04x\n", 3096 __func__, 3097 id[49], id[82], id[83], id[84], 3098 id[85], id[86], id[87], id[88]); 3099 3100 /* initialize to-be-configured parameters */ 3101 dev->flags &= ~ATA_DFLAG_CFG_MASK; 3102 dev->max_sectors = 0; 3103 dev->cdb_len = 0; 3104 dev->n_sectors = 0; 3105 dev->cylinders = 0; 3106 dev->heads = 0; 3107 dev->sectors = 0; 3108 dev->multi_count = 0; 3109 3110 /* 3111 * common ATA, ATAPI feature tests 3112 */ 3113 3114 /* find max transfer mode; for printk only */ 3115 xfer_mask = ata_id_xfermask(id); 3116 3117 ata_dump_id(dev, id); 3118 3119 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ 3120 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, 3121 sizeof(fwrevbuf)); 3122 3123 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, 3124 sizeof(modelbuf)); 3125 3126 /* ATA-specific feature tests */ 3127 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 3128 if (ata_id_is_cfa(id)) { 3129 /* CPRM may make this media unusable */ 3130 if (id[ATA_ID_CFA_KEY_MGMT] & 1) 3131 ata_dev_warn(dev, 3132 "supports DRM functions and may not be fully accessible\n"); 3133 snprintf(revbuf, 7, "CFA"); 3134 } else { 3135 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); 3136 /* Warn the user if the device has TPM extensions */ 3137 if (ata_id_has_tpm(id)) 3138 ata_dev_warn(dev, 3139 "supports DRM functions and may not be fully accessible\n"); 3140 } 3141 3142 dev->n_sectors = ata_id_n_sectors(id); 3143 if (ata_id_is_locked(id)) { 3144 /* 3145 * If Security locked, set capacity to zero to prevent 3146 * any I/O, e.g. partition scanning, as any I/O to a 3147 * locked drive will result in user visible errors. 3148 */ 3149 ata_dev_info(dev, 3150 "Security locked, setting capacity to zero\n"); 3151 dev->n_sectors = 0; 3152 } 3153 3154 /* get current R/W Multiple count setting */ 3155 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) { 3156 unsigned int max = dev->id[47] & 0xff; 3157 unsigned int cnt = dev->id[59] & 0xff; 3158 /* only recognize/allow powers of two here */ 3159 if (is_power_of_2(max) && is_power_of_2(cnt)) 3160 if (cnt <= max) 3161 dev->multi_count = cnt; 3162 } 3163 3164 /* print device info to dmesg */ 3165 if (print_info) 3166 ata_dev_info(dev, "%s: %s, %s, max %s\n", 3167 revbuf, modelbuf, fwrevbuf, 3168 ata_mode_string(xfer_mask)); 3169 3170 if (ata_id_has_lba(id)) { 3171 rc = ata_dev_config_lba(dev); 3172 if (rc) 3173 return rc; 3174 } else { 3175 ata_dev_config_chs(dev); 3176 } 3177 3178 ata_dev_config_lpm(dev); 3179 ata_dev_config_fua(dev); 3180 ata_dev_config_devslp(dev); 3181 ata_dev_config_sense_reporting(dev); 3182 ata_dev_config_zoned(dev); 3183 ata_dev_config_trusted(dev); 3184 ata_dev_config_cpr(dev); 3185 ata_dev_config_cdl(dev); 3186 ata_dev_config_depop(dev); 3187 dev->cdb_len = 32; 3188 3189 if (print_info) 3190 ata_dev_print_features(dev); 3191 } 3192 3193 /* ATAPI-specific feature tests */ 3194 else if (dev->class == ATA_DEV_ATAPI) { 3195 const char *cdb_intr_string = ""; 3196 const char *atapi_an_string = ""; 3197 const char *dma_dir_string = ""; 3198 u32 sntf; 3199 3200 rc = atapi_cdb_len(id); 3201 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { 3202 ata_dev_warn(dev, "unsupported CDB len %d\n", rc); 3203 rc = -EINVAL; 3204 goto err_out_nosup; 3205 } 3206 dev->cdb_len = (unsigned int) rc; 3207 3208 /* Enable ATAPI AN if both the host and device have 3209 * the support. If PMP is attached, SNTF is required 3210 * to enable ATAPI AN to discern between PHY status 3211 * changed notifications and ATAPI ANs. 3212 */ 3213 if (atapi_an && 3214 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && 3215 (!sata_pmp_attached(ap) || 3216 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { 3217 /* issue SET feature command to turn this on */ 3218 err_mask = ata_dev_set_feature(dev, 3219 SETFEATURES_SATA_ENABLE, SATA_AN); 3220 if (err_mask) 3221 ata_dev_err(dev, 3222 "failed to enable ATAPI AN (err_mask=0x%x)\n", 3223 err_mask); 3224 else { 3225 dev->flags |= ATA_DFLAG_AN; 3226 atapi_an_string = ", ATAPI AN"; 3227 } 3228 } 3229 3230 if (ata_id_cdb_intr(dev->id)) { 3231 dev->flags |= ATA_DFLAG_CDB_INTR; 3232 cdb_intr_string = ", CDB intr"; 3233 } 3234 3235 if (atapi_dmadir || (dev->quirks & ATA_QUIRK_ATAPI_DMADIR) || 3236 atapi_id_dmadir(dev->id)) { 3237 dev->flags |= ATA_DFLAG_DMADIR; 3238 dma_dir_string = ", DMADIR"; 3239 } 3240 3241 if (ata_id_has_da(dev->id)) { 3242 dev->flags |= ATA_DFLAG_DA; 3243 zpodd_init(dev); 3244 } 3245 3246 /* print device info to dmesg */ 3247 if (print_info) 3248 ata_dev_info(dev, 3249 "ATAPI: %s, %s, max %s%s%s%s\n", 3250 modelbuf, fwrevbuf, 3251 ata_mode_string(xfer_mask), 3252 cdb_intr_string, atapi_an_string, 3253 dma_dir_string); 3254 3255 ata_dev_config_lpm(dev); 3256 3257 if (print_info) 3258 ata_dev_print_features(dev); 3259 } 3260 3261 /* determine max_sectors */ 3262 dev->max_sectors = ATA_MAX_SECTORS; 3263 if (dev->flags & ATA_DFLAG_LBA48) 3264 dev->max_sectors = ATA_MAX_SECTORS_LBA48; 3265 3266 /* Limit PATA drive on SATA cable bridge transfers to udma5, 3267 200 sectors */ 3268 if (ata_dev_knobble(dev)) { 3269 if (print_info) 3270 ata_dev_info(dev, "applying bridge limits\n"); 3271 dev->udma_mask &= ATA_UDMA5; 3272 dev->max_sectors = ATA_MAX_SECTORS; 3273 } 3274 3275 if ((dev->class == ATA_DEV_ATAPI) && 3276 (atapi_command_packet_set(id) == TYPE_TAPE)) { 3277 dev->max_sectors = ATA_MAX_SECTORS_TAPE; 3278 dev->quirks |= ATA_QUIRK_STUCK_ERR; 3279 } 3280 3281 if (dev->quirks & ATA_QUIRK_MAX_SEC) 3282 dev->max_sectors = min_t(unsigned int, dev->max_sectors, 3283 ata_dev_get_quirk_value(dev, 3284 ATA_QUIRK_MAX_SEC)); 3285 3286 if (dev->quirks & ATA_QUIRK_MAX_SEC_LBA48) 3287 dev->max_sectors = ATA_MAX_SECTORS_LBA48; 3288 3289 if (ap->ops->dev_config) 3290 ap->ops->dev_config(dev); 3291 3292 if (dev->quirks & ATA_QUIRK_DIAGNOSTIC) { 3293 /* Let the user know. We don't want to disallow opens for 3294 rescue purposes, or in case the vendor is just a blithering 3295 idiot. Do this after the dev_config call as some controllers 3296 with buggy firmware may want to avoid reporting false device 3297 bugs */ 3298 3299 if (print_info) { 3300 ata_dev_warn(dev, 3301 "Drive reports diagnostics failure. This may indicate a drive\n"); 3302 ata_dev_warn(dev, 3303 "fault or invalid emulation. Contact drive vendor for information.\n"); 3304 } 3305 } 3306 3307 if ((dev->quirks & ATA_QUIRK_FIRMWARE_WARN) && print_info) { 3308 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n"); 3309 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n"); 3310 } 3311 3312 return 0; 3313 3314 err_out_nosup: 3315 return rc; 3316 } 3317 3318 /** 3319 * ata_cable_40wire - return 40 wire cable type 3320 * @ap: port 3321 * 3322 * Helper method for drivers which want to hardwire 40 wire cable 3323 * detection. 3324 */ 3325 3326 int ata_cable_40wire(struct ata_port *ap) 3327 { 3328 return ATA_CBL_PATA40; 3329 } 3330 EXPORT_SYMBOL_GPL(ata_cable_40wire); 3331 3332 /** 3333 * ata_cable_80wire - return 80 wire cable type 3334 * @ap: port 3335 * 3336 * Helper method for drivers which want to hardwire 80 wire cable 3337 * detection. 3338 */ 3339 3340 int ata_cable_80wire(struct ata_port *ap) 3341 { 3342 return ATA_CBL_PATA80; 3343 } 3344 EXPORT_SYMBOL_GPL(ata_cable_80wire); 3345 3346 /** 3347 * ata_cable_unknown - return unknown PATA cable. 3348 * @ap: port 3349 * 3350 * Helper method for drivers which have no PATA cable detection. 3351 */ 3352 3353 int ata_cable_unknown(struct ata_port *ap) 3354 { 3355 return ATA_CBL_PATA_UNK; 3356 } 3357 EXPORT_SYMBOL_GPL(ata_cable_unknown); 3358 3359 /** 3360 * ata_cable_ignore - return ignored PATA cable. 3361 * @ap: port 3362 * 3363 * Helper method for drivers which don't use cable type to limit 3364 * transfer mode. 3365 */ 3366 int ata_cable_ignore(struct ata_port *ap) 3367 { 3368 return ATA_CBL_PATA_IGN; 3369 } 3370 EXPORT_SYMBOL_GPL(ata_cable_ignore); 3371 3372 /** 3373 * ata_cable_sata - return SATA cable type 3374 * @ap: port 3375 * 3376 * Helper method for drivers which have SATA cables 3377 */ 3378 3379 int ata_cable_sata(struct ata_port *ap) 3380 { 3381 return ATA_CBL_SATA; 3382 } 3383 EXPORT_SYMBOL_GPL(ata_cable_sata); 3384 3385 /** 3386 * sata_print_link_status - Print SATA link status 3387 * @link: SATA link to printk link status about 3388 * 3389 * This function prints link speed and status of a SATA link. 3390 * 3391 * LOCKING: 3392 * None. 3393 */ 3394 static void sata_print_link_status(struct ata_link *link) 3395 { 3396 u32 sstatus, scontrol, tmp; 3397 3398 if (sata_scr_read(link, SCR_STATUS, &sstatus)) 3399 return; 3400 if (sata_scr_read(link, SCR_CONTROL, &scontrol)) 3401 return; 3402 3403 if (ata_phys_link_online(link)) { 3404 tmp = (sstatus >> 4) & 0xf; 3405 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n", 3406 sata_spd_string(tmp), sstatus, scontrol); 3407 } else { 3408 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n", 3409 sstatus, scontrol); 3410 } 3411 } 3412 3413 /** 3414 * ata_dev_pair - return other device on cable 3415 * @adev: device 3416 * 3417 * Obtain the other device on the same cable, or if none is 3418 * present NULL is returned 3419 */ 3420 3421 struct ata_device *ata_dev_pair(struct ata_device *adev) 3422 { 3423 struct ata_link *link = adev->link; 3424 struct ata_device *pair = &link->device[1 - adev->devno]; 3425 if (!ata_dev_enabled(pair)) 3426 return NULL; 3427 return pair; 3428 } 3429 EXPORT_SYMBOL_GPL(ata_dev_pair); 3430 3431 #ifdef CONFIG_ATA_ACPI 3432 /** 3433 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration 3434 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine. 3435 * @cycle: cycle duration in ns 3436 * 3437 * Return matching xfer mode for @cycle. The returned mode is of 3438 * the transfer type specified by @xfer_shift. If @cycle is too 3439 * slow for @xfer_shift, 0xff is returned. If @cycle is faster 3440 * than the fastest known mode, the fasted mode is returned. 3441 * 3442 * LOCKING: 3443 * None. 3444 * 3445 * RETURNS: 3446 * Matching xfer_mode, 0xff if no match found. 3447 */ 3448 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle) 3449 { 3450 u8 base_mode = 0xff, last_mode = 0xff; 3451 const struct ata_xfer_ent *ent; 3452 const struct ata_timing *t; 3453 3454 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 3455 if (ent->shift == xfer_shift) 3456 base_mode = ent->base; 3457 3458 for (t = ata_timing_find_mode(base_mode); 3459 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) { 3460 unsigned short this_cycle; 3461 3462 switch (xfer_shift) { 3463 case ATA_SHIFT_PIO: 3464 case ATA_SHIFT_MWDMA: 3465 this_cycle = t->cycle; 3466 break; 3467 case ATA_SHIFT_UDMA: 3468 this_cycle = t->udma; 3469 break; 3470 default: 3471 return 0xff; 3472 } 3473 3474 if (cycle > this_cycle) 3475 break; 3476 3477 last_mode = t->mode; 3478 } 3479 3480 return last_mode; 3481 } 3482 #endif 3483 3484 /** 3485 * ata_down_xfermask_limit - adjust dev xfer masks downward 3486 * @dev: Device to adjust xfer masks 3487 * @sel: ATA_DNXFER_* selector 3488 * 3489 * Adjust xfer masks of @dev downward. Note that this function 3490 * does not apply the change. Invoking ata_set_mode() afterwards 3491 * will apply the limit. 3492 * 3493 * LOCKING: 3494 * Inherited from caller. 3495 * 3496 * RETURNS: 3497 * 0 on success, negative errno on failure 3498 */ 3499 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) 3500 { 3501 char buf[32]; 3502 unsigned int orig_mask, xfer_mask; 3503 unsigned int pio_mask, mwdma_mask, udma_mask; 3504 int quiet, highbit; 3505 3506 quiet = !!(sel & ATA_DNXFER_QUIET); 3507 sel &= ~ATA_DNXFER_QUIET; 3508 3509 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, 3510 dev->mwdma_mask, 3511 dev->udma_mask); 3512 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); 3513 3514 switch (sel) { 3515 case ATA_DNXFER_PIO: 3516 highbit = fls(pio_mask) - 1; 3517 pio_mask &= ~(1 << highbit); 3518 break; 3519 3520 case ATA_DNXFER_DMA: 3521 if (udma_mask) { 3522 highbit = fls(udma_mask) - 1; 3523 udma_mask &= ~(1 << highbit); 3524 if (!udma_mask) 3525 return -ENOENT; 3526 } else if (mwdma_mask) { 3527 highbit = fls(mwdma_mask) - 1; 3528 mwdma_mask &= ~(1 << highbit); 3529 if (!mwdma_mask) 3530 return -ENOENT; 3531 } 3532 break; 3533 3534 case ATA_DNXFER_40C: 3535 udma_mask &= ATA_UDMA_MASK_40C; 3536 break; 3537 3538 case ATA_DNXFER_FORCE_PIO0: 3539 pio_mask &= 1; 3540 fallthrough; 3541 case ATA_DNXFER_FORCE_PIO: 3542 mwdma_mask = 0; 3543 udma_mask = 0; 3544 break; 3545 3546 default: 3547 BUG(); 3548 } 3549 3550 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 3551 3552 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) 3553 return -ENOENT; 3554 3555 if (!quiet) { 3556 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) 3557 snprintf(buf, sizeof(buf), "%s:%s", 3558 ata_mode_string(xfer_mask), 3559 ata_mode_string(xfer_mask & ATA_MASK_PIO)); 3560 else 3561 snprintf(buf, sizeof(buf), "%s", 3562 ata_mode_string(xfer_mask)); 3563 3564 ata_dev_warn(dev, "limiting speed to %s\n", buf); 3565 } 3566 3567 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, 3568 &dev->udma_mask); 3569 3570 return 0; 3571 } 3572 3573 static int ata_dev_set_mode(struct ata_device *dev) 3574 { 3575 struct ata_port *ap = dev->link->ap; 3576 struct ata_eh_context *ehc = &dev->link->eh_context; 3577 const bool nosetxfer = dev->quirks & ATA_QUIRK_NOSETXFER; 3578 const char *dev_err_whine = ""; 3579 int ign_dev_err = 0; 3580 unsigned int err_mask = 0; 3581 int rc; 3582 3583 dev->flags &= ~ATA_DFLAG_PIO; 3584 if (dev->xfer_shift == ATA_SHIFT_PIO) 3585 dev->flags |= ATA_DFLAG_PIO; 3586 3587 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id)) 3588 dev_err_whine = " (SET_XFERMODE skipped)"; 3589 else { 3590 if (nosetxfer) 3591 ata_dev_warn(dev, 3592 "NOSETXFER but PATA detected - can't " 3593 "skip SETXFER, might malfunction\n"); 3594 err_mask = ata_dev_set_xfermode(dev); 3595 } 3596 3597 if (err_mask & ~AC_ERR_DEV) 3598 goto fail; 3599 3600 /* revalidate */ 3601 ehc->i.flags |= ATA_EHI_POST_SETMODE; 3602 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); 3603 ehc->i.flags &= ~ATA_EHI_POST_SETMODE; 3604 if (rc) 3605 return rc; 3606 3607 if (dev->xfer_shift == ATA_SHIFT_PIO) { 3608 /* Old CFA may refuse this command, which is just fine */ 3609 if (ata_id_is_cfa(dev->id)) 3610 ign_dev_err = 1; 3611 /* Catch several broken garbage emulations plus some pre 3612 ATA devices */ 3613 if (ata_id_major_version(dev->id) == 0 && 3614 dev->pio_mode <= XFER_PIO_2) 3615 ign_dev_err = 1; 3616 /* Some very old devices and some bad newer ones fail 3617 any kind of SET_XFERMODE request but support PIO0-2 3618 timings and no IORDY */ 3619 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2) 3620 ign_dev_err = 1; 3621 } 3622 /* Early MWDMA devices do DMA but don't allow DMA mode setting. 3623 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */ 3624 if (dev->xfer_shift == ATA_SHIFT_MWDMA && 3625 dev->dma_mode == XFER_MW_DMA_0 && 3626 (dev->id[63] >> 8) & 1) 3627 ign_dev_err = 1; 3628 3629 /* if the device is actually configured correctly, ignore dev err */ 3630 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id))) 3631 ign_dev_err = 1; 3632 3633 if (err_mask & AC_ERR_DEV) { 3634 if (!ign_dev_err) 3635 goto fail; 3636 else 3637 dev_err_whine = " (device error ignored)"; 3638 } 3639 3640 ata_dev_dbg(dev, "xfer_shift=%u, xfer_mode=0x%x\n", 3641 dev->xfer_shift, (int)dev->xfer_mode); 3642 3643 if (!(ehc->i.flags & ATA_EHI_QUIET) || 3644 ehc->i.flags & ATA_EHI_DID_HARDRESET) 3645 ata_dev_info(dev, "configured for %s%s\n", 3646 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)), 3647 dev_err_whine); 3648 3649 return 0; 3650 3651 fail: 3652 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask); 3653 return -EIO; 3654 } 3655 3656 /** 3657 * ata_set_mode - Program timings and issue SET FEATURES - XFER 3658 * @link: link on which timings will be programmed 3659 * @r_failed_dev: out parameter for failed device 3660 * 3661 * Standard implementation of the function used to tune and set 3662 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If 3663 * ata_dev_set_mode() fails, pointer to the failing device is 3664 * returned in @r_failed_dev. 3665 * 3666 * LOCKING: 3667 * PCI/etc. bus probe sem. 3668 * 3669 * RETURNS: 3670 * 0 on success, negative errno otherwise 3671 */ 3672 3673 int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) 3674 { 3675 struct ata_port *ap = link->ap; 3676 struct ata_device *dev; 3677 int rc = 0, used_dma = 0, found = 0; 3678 3679 /* step 1: calculate xfer_mask */ 3680 ata_for_each_dev(dev, link, ENABLED) { 3681 unsigned int pio_mask, dma_mask; 3682 unsigned int mode_mask; 3683 3684 mode_mask = ATA_DMA_MASK_ATA; 3685 if (dev->class == ATA_DEV_ATAPI) 3686 mode_mask = ATA_DMA_MASK_ATAPI; 3687 else if (ata_id_is_cfa(dev->id)) 3688 mode_mask = ATA_DMA_MASK_CFA; 3689 3690 ata_dev_xfermask(dev); 3691 ata_force_xfermask(dev); 3692 3693 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); 3694 3695 if (libata_dma_mask & mode_mask) 3696 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, 3697 dev->udma_mask); 3698 else 3699 dma_mask = 0; 3700 3701 dev->pio_mode = ata_xfer_mask2mode(pio_mask); 3702 dev->dma_mode = ata_xfer_mask2mode(dma_mask); 3703 3704 found = 1; 3705 if (ata_dma_enabled(dev)) 3706 used_dma = 1; 3707 } 3708 if (!found) 3709 goto out; 3710 3711 /* step 2: always set host PIO timings */ 3712 ata_for_each_dev(dev, link, ENABLED) { 3713 if (dev->pio_mode == 0xff) { 3714 ata_dev_warn(dev, "no PIO support\n"); 3715 rc = -EINVAL; 3716 goto out; 3717 } 3718 3719 dev->xfer_mode = dev->pio_mode; 3720 dev->xfer_shift = ATA_SHIFT_PIO; 3721 if (ap->ops->set_piomode) 3722 ap->ops->set_piomode(ap, dev); 3723 } 3724 3725 /* step 3: set host DMA timings */ 3726 ata_for_each_dev(dev, link, ENABLED) { 3727 if (!ata_dma_enabled(dev)) 3728 continue; 3729 3730 dev->xfer_mode = dev->dma_mode; 3731 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); 3732 if (ap->ops->set_dmamode) 3733 ap->ops->set_dmamode(ap, dev); 3734 } 3735 3736 /* step 4: update devices' xfer mode */ 3737 ata_for_each_dev(dev, link, ENABLED) { 3738 rc = ata_dev_set_mode(dev); 3739 if (rc) 3740 goto out; 3741 } 3742 3743 /* Record simplex status. If we selected DMA then the other 3744 * host channels are not permitted to do so. 3745 */ 3746 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) 3747 ap->host->simplex_claimed = ap; 3748 3749 out: 3750 if (rc) 3751 *r_failed_dev = dev; 3752 return rc; 3753 } 3754 EXPORT_SYMBOL_GPL(ata_set_mode); 3755 3756 /** 3757 * ata_wait_ready - wait for link to become ready 3758 * @link: link to be waited on 3759 * @deadline: deadline jiffies for the operation 3760 * @check_ready: callback to check link readiness 3761 * 3762 * Wait for @link to become ready. @check_ready should return 3763 * positive number if @link is ready, 0 if it isn't, -ENODEV if 3764 * link doesn't seem to be occupied, other errno for other error 3765 * conditions. 3766 * 3767 * Transient -ENODEV conditions are allowed for 3768 * ATA_TMOUT_FF_WAIT. 3769 * 3770 * LOCKING: 3771 * EH context. 3772 * 3773 * RETURNS: 3774 * 0 if @link is ready before @deadline; otherwise, -errno. 3775 */ 3776 int ata_wait_ready(struct ata_link *link, unsigned long deadline, 3777 int (*check_ready)(struct ata_link *link)) 3778 { 3779 unsigned long start = jiffies; 3780 unsigned long nodev_deadline; 3781 int warned = 0; 3782 3783 /* choose which 0xff timeout to use, read comment in libata.h */ 3784 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN) 3785 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG); 3786 else 3787 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT); 3788 3789 /* Slave readiness can't be tested separately from master. On 3790 * M/S emulation configuration, this function should be called 3791 * only on the master and it will handle both master and slave. 3792 */ 3793 WARN_ON(link == link->ap->slave_link); 3794 3795 if (time_after(nodev_deadline, deadline)) 3796 nodev_deadline = deadline; 3797 3798 while (1) { 3799 unsigned long now = jiffies; 3800 int ready, tmp; 3801 3802 ready = tmp = check_ready(link); 3803 if (ready > 0) 3804 return 0; 3805 3806 /* 3807 * -ENODEV could be transient. Ignore -ENODEV if link 3808 * is online. Also, some SATA devices take a long 3809 * time to clear 0xff after reset. Wait for 3810 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't 3811 * offline. 3812 * 3813 * Note that some PATA controllers (pata_ali) explode 3814 * if status register is read more than once when 3815 * there's no device attached. 3816 */ 3817 if (ready == -ENODEV) { 3818 if (ata_link_online(link)) 3819 ready = 0; 3820 else if ((link->ap->flags & ATA_FLAG_SATA) && 3821 !ata_link_offline(link) && 3822 time_before(now, nodev_deadline)) 3823 ready = 0; 3824 } 3825 3826 if (ready) 3827 return ready; 3828 if (time_after(now, deadline)) 3829 return -EBUSY; 3830 3831 if (!warned && time_after(now, start + 5 * HZ) && 3832 (deadline - now > 3 * HZ)) { 3833 ata_link_warn(link, 3834 "link is slow to respond, please be patient " 3835 "(ready=%d)\n", tmp); 3836 warned = 1; 3837 } 3838 3839 ata_msleep(link->ap, 50); 3840 } 3841 } 3842 3843 /** 3844 * ata_wait_after_reset - wait for link to become ready after reset 3845 * @link: link to be waited on 3846 * @deadline: deadline jiffies for the operation 3847 * @check_ready: callback to check link readiness 3848 * 3849 * Wait for @link to become ready after reset. 3850 * 3851 * LOCKING: 3852 * EH context. 3853 * 3854 * RETURNS: 3855 * 0 if @link is ready before @deadline; otherwise, -errno. 3856 */ 3857 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 3858 int (*check_ready)(struct ata_link *link)) 3859 { 3860 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET); 3861 3862 return ata_wait_ready(link, deadline, check_ready); 3863 } 3864 EXPORT_SYMBOL_GPL(ata_wait_after_reset); 3865 3866 /** 3867 * ata_std_prereset - prepare for reset 3868 * @link: ATA link to be reset 3869 * @deadline: deadline jiffies for the operation 3870 * 3871 * @link is about to be reset. Initialize it. Failure from 3872 * prereset makes libata abort whole reset sequence and give up 3873 * that port, so prereset should be best-effort. It does its 3874 * best to prepare for reset sequence but if things go wrong, it 3875 * should just whine, not fail. 3876 * 3877 * LOCKING: 3878 * Kernel thread context (may sleep) 3879 * 3880 * RETURNS: 3881 * Always 0. 3882 */ 3883 int ata_std_prereset(struct ata_link *link, unsigned long deadline) 3884 { 3885 struct ata_port *ap = link->ap; 3886 struct ata_eh_context *ehc = &link->eh_context; 3887 const unsigned int *timing = sata_ehc_deb_timing(ehc); 3888 int rc; 3889 3890 /* if we're about to do hardreset, nothing more to do */ 3891 if (ehc->i.action & ATA_EH_HARDRESET) 3892 return 0; 3893 3894 /* if SATA, resume link */ 3895 if (ap->flags & ATA_FLAG_SATA) { 3896 rc = sata_link_resume(link, timing, deadline); 3897 /* whine about phy resume failure but proceed */ 3898 if (rc && rc != -EOPNOTSUPP) 3899 ata_link_warn(link, 3900 "failed to resume link for reset (errno=%d)\n", 3901 rc); 3902 } 3903 3904 /* no point in trying softreset on offline link */ 3905 if (ata_phys_link_offline(link)) 3906 ehc->i.action &= ~ATA_EH_SOFTRESET; 3907 3908 return 0; 3909 } 3910 EXPORT_SYMBOL_GPL(ata_std_prereset); 3911 3912 /** 3913 * ata_std_postreset - standard postreset callback 3914 * @link: the target ata_link 3915 * @classes: classes of attached devices 3916 * 3917 * This function is invoked after a successful reset. Note that 3918 * the device might have been reset more than once using 3919 * different reset methods before postreset is invoked. 3920 * 3921 * LOCKING: 3922 * Kernel thread context (may sleep) 3923 */ 3924 void ata_std_postreset(struct ata_link *link, unsigned int *classes) 3925 { 3926 u32 serror; 3927 3928 /* reset complete, clear SError */ 3929 if (!sata_scr_read(link, SCR_ERROR, &serror)) 3930 sata_scr_write(link, SCR_ERROR, serror); 3931 3932 /* print link status */ 3933 sata_print_link_status(link); 3934 } 3935 EXPORT_SYMBOL_GPL(ata_std_postreset); 3936 3937 /** 3938 * ata_dev_same_device - Determine whether new ID matches configured device 3939 * @dev: device to compare against 3940 * @new_class: class of the new device 3941 * @new_id: IDENTIFY page of the new device 3942 * 3943 * Compare @new_class and @new_id against @dev and determine 3944 * whether @dev is the device indicated by @new_class and 3945 * @new_id. 3946 * 3947 * LOCKING: 3948 * None. 3949 * 3950 * RETURNS: 3951 * 1 if @dev matches @new_class and @new_id, 0 otherwise. 3952 */ 3953 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, 3954 const u16 *new_id) 3955 { 3956 const u16 *old_id = dev->id; 3957 unsigned char model[2][ATA_ID_PROD_LEN + 1]; 3958 unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; 3959 3960 if (dev->class != new_class) { 3961 ata_dev_info(dev, "class mismatch %d != %d\n", 3962 dev->class, new_class); 3963 return 0; 3964 } 3965 3966 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); 3967 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); 3968 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); 3969 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); 3970 3971 if (strcmp(model[0], model[1])) { 3972 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n", 3973 model[0], model[1]); 3974 return 0; 3975 } 3976 3977 if (strcmp(serial[0], serial[1])) { 3978 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n", 3979 serial[0], serial[1]); 3980 return 0; 3981 } 3982 3983 return 1; 3984 } 3985 3986 /** 3987 * ata_dev_reread_id - Re-read IDENTIFY data 3988 * @dev: target ATA device 3989 * @readid_flags: read ID flags 3990 * 3991 * Re-read IDENTIFY page and make sure @dev is still attached to 3992 * the port. 3993 * 3994 * LOCKING: 3995 * Kernel thread context (may sleep) 3996 * 3997 * RETURNS: 3998 * 0 on success, negative errno otherwise 3999 */ 4000 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) 4001 { 4002 unsigned int class = dev->class; 4003 u16 *id = (void *)dev->sector_buf; 4004 int rc; 4005 4006 /* read ID data */ 4007 rc = ata_dev_read_id(dev, &class, readid_flags, id); 4008 if (rc) 4009 return rc; 4010 4011 /* is the device still there? */ 4012 if (!ata_dev_same_device(dev, class, id)) 4013 return -ENODEV; 4014 4015 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); 4016 return 0; 4017 } 4018 4019 /** 4020 * ata_dev_revalidate - Revalidate ATA device 4021 * @dev: device to revalidate 4022 * @new_class: new class code 4023 * @readid_flags: read ID flags 4024 * 4025 * Re-read IDENTIFY page, make sure @dev is still attached to the 4026 * port and reconfigure it according to the new IDENTIFY page. 4027 * 4028 * LOCKING: 4029 * Kernel thread context (may sleep) 4030 * 4031 * RETURNS: 4032 * 0 on success, negative errno otherwise 4033 */ 4034 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, 4035 unsigned int readid_flags) 4036 { 4037 u64 n_sectors = dev->n_sectors; 4038 u64 n_native_sectors = dev->n_native_sectors; 4039 int rc; 4040 4041 if (!ata_dev_enabled(dev)) 4042 return -ENODEV; 4043 4044 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ 4045 if (ata_class_enabled(new_class) && new_class == ATA_DEV_PMP) { 4046 ata_dev_info(dev, "class mismatch %u != %u\n", 4047 dev->class, new_class); 4048 rc = -ENODEV; 4049 goto fail; 4050 } 4051 4052 /* re-read ID */ 4053 rc = ata_dev_reread_id(dev, readid_flags); 4054 if (rc) 4055 goto fail; 4056 4057 /* configure device according to the new ID */ 4058 rc = ata_dev_configure(dev); 4059 if (rc) 4060 goto fail; 4061 4062 /* verify n_sectors hasn't changed */ 4063 if (dev->class != ATA_DEV_ATA || !n_sectors || 4064 dev->n_sectors == n_sectors || ata_id_is_locked(dev->id)) 4065 return 0; 4066 4067 /* n_sectors has changed */ 4068 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n", 4069 (unsigned long long)n_sectors, 4070 (unsigned long long)dev->n_sectors); 4071 4072 /* 4073 * Something could have caused HPA to be unlocked 4074 * involuntarily. If n_native_sectors hasn't changed and the 4075 * new size matches it, keep the device. 4076 */ 4077 if (dev->n_native_sectors == n_native_sectors && 4078 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) { 4079 ata_dev_warn(dev, 4080 "new n_sectors matches native, probably " 4081 "late HPA unlock, n_sectors updated\n"); 4082 /* use the larger n_sectors */ 4083 return 0; 4084 } 4085 4086 /* 4087 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try 4088 * unlocking HPA in those cases. 4089 * 4090 * https://bugzilla.kernel.org/show_bug.cgi?id=15396 4091 */ 4092 if (dev->n_native_sectors == n_native_sectors && 4093 dev->n_sectors < n_sectors && n_sectors == n_native_sectors && 4094 !(dev->quirks & ATA_QUIRK_BROKEN_HPA)) { 4095 ata_dev_warn(dev, 4096 "old n_sectors matches native, probably " 4097 "late HPA lock, will try to unlock HPA\n"); 4098 /* try unlocking HPA */ 4099 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 4100 rc = -EIO; 4101 } else 4102 rc = -ENODEV; 4103 4104 /* restore original n_[native_]sectors and fail */ 4105 dev->n_native_sectors = n_native_sectors; 4106 dev->n_sectors = n_sectors; 4107 fail: 4108 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc); 4109 return rc; 4110 } 4111 4112 static const char * const ata_quirk_names[] = { 4113 [__ATA_QUIRK_DIAGNOSTIC] = "diagnostic", 4114 [__ATA_QUIRK_NODMA] = "nodma", 4115 [__ATA_QUIRK_NONCQ] = "noncq", 4116 [__ATA_QUIRK_BROKEN_HPA] = "brokenhpa", 4117 [__ATA_QUIRK_DISABLE] = "disable", 4118 [__ATA_QUIRK_HPA_SIZE] = "hpasize", 4119 [__ATA_QUIRK_IVB] = "ivb", 4120 [__ATA_QUIRK_STUCK_ERR] = "stuckerr", 4121 [__ATA_QUIRK_BRIDGE_OK] = "bridgeok", 4122 [__ATA_QUIRK_ATAPI_MOD16_DMA] = "atapimod16dma", 4123 [__ATA_QUIRK_FIRMWARE_WARN] = "firmwarewarn", 4124 [__ATA_QUIRK_1_5_GBPS] = "1.5gbps", 4125 [__ATA_QUIRK_NOSETXFER] = "nosetxfer", 4126 [__ATA_QUIRK_BROKEN_FPDMA_AA] = "brokenfpdmaaa", 4127 [__ATA_QUIRK_DUMP_ID] = "dumpid", 4128 [__ATA_QUIRK_MAX_SEC_LBA48] = "maxseclba48", 4129 [__ATA_QUIRK_ATAPI_DMADIR] = "atapidmadir", 4130 [__ATA_QUIRK_NO_NCQ_TRIM] = "noncqtrim", 4131 [__ATA_QUIRK_NOLPM] = "nolpm", 4132 [__ATA_QUIRK_WD_BROKEN_LPM] = "wdbrokenlpm", 4133 [__ATA_QUIRK_ZERO_AFTER_TRIM] = "zeroaftertrim", 4134 [__ATA_QUIRK_NO_DMA_LOG] = "nodmalog", 4135 [__ATA_QUIRK_NOTRIM] = "notrim", 4136 [__ATA_QUIRK_MAX_SEC] = "maxsec", 4137 [__ATA_QUIRK_MAX_TRIM_128M] = "maxtrim128m", 4138 [__ATA_QUIRK_NO_NCQ_ON_ATI] = "noncqonati", 4139 [__ATA_QUIRK_NO_LPM_ON_ATI] = "nolpmonati", 4140 [__ATA_QUIRK_NO_ID_DEV_LOG] = "noiddevlog", 4141 [__ATA_QUIRK_NO_LOG_DIR] = "nologdir", 4142 [__ATA_QUIRK_NO_FUA] = "nofua", 4143 }; 4144 4145 static void ata_dev_print_quirks(const struct ata_device *dev, 4146 const char *model, const char *rev, 4147 unsigned int quirks) 4148 { 4149 struct ata_eh_context *ehc = &dev->link->eh_context; 4150 int n = 0, i; 4151 size_t sz; 4152 char *str; 4153 4154 if (!ata_dev_print_info(dev) || ehc->i.flags & ATA_EHI_DID_PRINT_QUIRKS) 4155 return; 4156 4157 ehc->i.flags |= ATA_EHI_DID_PRINT_QUIRKS; 4158 4159 if (!quirks) 4160 return; 4161 4162 sz = 64 + ARRAY_SIZE(ata_quirk_names) * 16; 4163 str = kmalloc(sz, GFP_KERNEL); 4164 if (!str) 4165 return; 4166 4167 n = snprintf(str, sz, "Model '%s', rev '%s', applying quirks:", 4168 model, rev); 4169 4170 for (i = 0; i < ARRAY_SIZE(ata_quirk_names); i++) { 4171 if (quirks & (1U << i)) 4172 n += snprintf(str + n, sz - n, 4173 " %s", ata_quirk_names[i]); 4174 } 4175 4176 ata_dev_warn(dev, "%s\n", str); 4177 4178 kfree(str); 4179 } 4180 4181 struct ata_dev_quirk_value { 4182 const char *model_num; 4183 const char *model_rev; 4184 u64 val; 4185 }; 4186 4187 static const struct ata_dev_quirk_value __ata_dev_max_sec_quirks[] = { 4188 { "TORiSAN DVD-ROM DRD-N216", NULL, 128 }, 4189 { "ST380013AS", "3.20", 1024 }, 4190 { "LITEON CX1-JB*-HP", NULL, 1024 }, 4191 { "LITEON EP1-*", NULL, 1024 }, 4192 { "DELLBOSS VD", "MV.R00-0", 8191 }, 4193 { "INTEL SSDSC2KG480G8", "XCV10120", 8191 }, 4194 { }, 4195 }; 4196 4197 struct ata_dev_quirks_entry { 4198 const char *model_num; 4199 const char *model_rev; 4200 u64 quirks; 4201 }; 4202 4203 static const struct ata_dev_quirks_entry __ata_dev_quirks[] = { 4204 /* Devices with DMA related problems under Linux */ 4205 { "WDC AC11000H", NULL, ATA_QUIRK_NODMA }, 4206 { "WDC AC22100H", NULL, ATA_QUIRK_NODMA }, 4207 { "WDC AC32500H", NULL, ATA_QUIRK_NODMA }, 4208 { "WDC AC33100H", NULL, ATA_QUIRK_NODMA }, 4209 { "WDC AC31600H", NULL, ATA_QUIRK_NODMA }, 4210 { "WDC AC32100H", "24.09P07", ATA_QUIRK_NODMA }, 4211 { "WDC AC23200L", "21.10N21", ATA_QUIRK_NODMA }, 4212 { "Compaq CRD-8241B", NULL, ATA_QUIRK_NODMA }, 4213 { "CRD-8400B", NULL, ATA_QUIRK_NODMA }, 4214 { "CRD-848[02]B", NULL, ATA_QUIRK_NODMA }, 4215 { "CRD-84", NULL, ATA_QUIRK_NODMA }, 4216 { "SanDisk SDP3B", NULL, ATA_QUIRK_NODMA }, 4217 { "SanDisk SDP3B-64", NULL, ATA_QUIRK_NODMA }, 4218 { "SANYO CD-ROM CRD", NULL, ATA_QUIRK_NODMA }, 4219 { "HITACHI CDR-8", NULL, ATA_QUIRK_NODMA }, 4220 { "HITACHI CDR-8[34]35", NULL, ATA_QUIRK_NODMA }, 4221 { "Toshiba CD-ROM XM-6202B", NULL, ATA_QUIRK_NODMA }, 4222 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_QUIRK_NODMA }, 4223 { "CD-532E-A", NULL, ATA_QUIRK_NODMA }, 4224 { "E-IDE CD-ROM CR-840", NULL, ATA_QUIRK_NODMA }, 4225 { "CD-ROM Drive/F5A", NULL, ATA_QUIRK_NODMA }, 4226 { "WPI CDD-820", NULL, ATA_QUIRK_NODMA }, 4227 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_QUIRK_NODMA }, 4228 { "SAMSUNG CD-ROM SC", NULL, ATA_QUIRK_NODMA }, 4229 { "ATAPI CD-ROM DRIVE 40X MAXIMUM", NULL, ATA_QUIRK_NODMA }, 4230 { "_NEC DV5800A", NULL, ATA_QUIRK_NODMA }, 4231 { "SAMSUNG CD-ROM SN-124", "N001", ATA_QUIRK_NODMA }, 4232 { "Seagate STT20000A", NULL, ATA_QUIRK_NODMA }, 4233 { " 2GB ATA Flash Disk", "ADMA428M", ATA_QUIRK_NODMA }, 4234 { "VRFDFC22048UCHC-TE*", NULL, ATA_QUIRK_NODMA }, 4235 /* Odd clown on sil3726/4726 PMPs */ 4236 { "Config Disk", NULL, ATA_QUIRK_DISABLE }, 4237 /* Similar story with ASMedia 1092 */ 4238 { "ASMT109x- Config", NULL, ATA_QUIRK_DISABLE }, 4239 4240 /* Weird ATAPI devices */ 4241 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_QUIRK_MAX_SEC }, 4242 { "QUANTUM DAT DAT72-000", NULL, ATA_QUIRK_ATAPI_MOD16_DMA }, 4243 { "Slimtype DVD A DS8A8SH", NULL, ATA_QUIRK_MAX_SEC_LBA48 }, 4244 { "Slimtype DVD A DS8A9SH", NULL, ATA_QUIRK_MAX_SEC_LBA48 }, 4245 4246 /* 4247 * Causes silent data corruption with higher max sects. 4248 * http://lkml.kernel.org/g/x49wpy40ysk.fsf@segfault.boston.devel.redhat.com 4249 */ 4250 { "ST380013AS", "3.20", ATA_QUIRK_MAX_SEC }, 4251 4252 /* 4253 * These devices time out with higher max sects. 4254 * https://bugzilla.kernel.org/show_bug.cgi?id=121671 4255 */ 4256 { "LITEON CX1-JB*-HP", NULL, ATA_QUIRK_MAX_SEC }, 4257 { "LITEON EP1-*", NULL, ATA_QUIRK_MAX_SEC }, 4258 4259 /* 4260 * These devices time out with higher max sects. 4261 * https://bugzilla.kernel.org/show_bug.cgi?id=220693 4262 */ 4263 { "DELLBOSS VD", "MV.R00-0", ATA_QUIRK_MAX_SEC }, 4264 4265 /* Devices we expect to fail diagnostics */ 4266 4267 /* Devices where NCQ should be avoided */ 4268 /* NCQ is slow */ 4269 { "WDC WD740ADFD-00", NULL, ATA_QUIRK_NONCQ }, 4270 { "WDC WD740ADFD-00NLR1", NULL, ATA_QUIRK_NONCQ }, 4271 /* http://thread.gmane.org/gmane.linux.ide/14907 */ 4272 { "FUJITSU MHT2060BH", NULL, ATA_QUIRK_NONCQ }, 4273 /* NCQ is broken */ 4274 { "Maxtor *", "BANC*", ATA_QUIRK_NONCQ }, 4275 { "Maxtor 7V300F0", "VA111630", ATA_QUIRK_NONCQ }, 4276 { "ST380817AS", "3.42", ATA_QUIRK_NONCQ }, 4277 { "ST3160023AS", "3.42", ATA_QUIRK_NONCQ }, 4278 { "OCZ CORE_SSD", "02.10104", ATA_QUIRK_NONCQ }, 4279 4280 /* Seagate NCQ + FLUSH CACHE firmware bug */ 4281 { "ST31500341AS", "SD1[5-9]", ATA_QUIRK_NONCQ | 4282 ATA_QUIRK_FIRMWARE_WARN }, 4283 4284 { "ST31000333AS", "SD1[5-9]", ATA_QUIRK_NONCQ | 4285 ATA_QUIRK_FIRMWARE_WARN }, 4286 4287 { "ST3640[36]23AS", "SD1[5-9]", ATA_QUIRK_NONCQ | 4288 ATA_QUIRK_FIRMWARE_WARN }, 4289 4290 { "ST3320[68]13AS", "SD1[5-9]", ATA_QUIRK_NONCQ | 4291 ATA_QUIRK_FIRMWARE_WARN }, 4292 4293 /* ADATA devices with LPM issues. */ 4294 { "ADATA SU680", NULL, ATA_QUIRK_NOLPM }, 4295 4296 /* Seagate disks with LPM issues */ 4297 { "ST1000DM010-2EP102", NULL, ATA_QUIRK_NOLPM }, 4298 { "ST2000DM008-2FR102", NULL, ATA_QUIRK_NOLPM }, 4299 4300 /* drives which fail FPDMA_AA activation (some may freeze afterwards) 4301 the ST disks also have LPM issues */ 4302 { "ST1000LM024 HN-M101MBB", NULL, ATA_QUIRK_BROKEN_FPDMA_AA | 4303 ATA_QUIRK_NOLPM }, 4304 { "VB0250EAVER", "HPG7", ATA_QUIRK_BROKEN_FPDMA_AA }, 4305 4306 /* Blacklist entries taken from Silicon Image 3124/3132 4307 Windows driver .inf file - also several Linux problem reports */ 4308 { "HTS541060G9SA00", "MB3OC60D", ATA_QUIRK_NONCQ }, 4309 { "HTS541080G9SA00", "MB4OC60D", ATA_QUIRK_NONCQ }, 4310 { "HTS541010G9SA00", "MBZOC60D", ATA_QUIRK_NONCQ }, 4311 4312 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */ 4313 { "C300-CTFDDAC128MAG", "0001", ATA_QUIRK_NONCQ }, 4314 4315 /* Sandisk SD7/8/9s lock up hard on large trims */ 4316 { "SanDisk SD[789]*", NULL, ATA_QUIRK_MAX_TRIM_128M }, 4317 4318 /* devices which puke on READ_NATIVE_MAX */ 4319 { "HDS724040KLSA80", "KFAOA20N", ATA_QUIRK_BROKEN_HPA }, 4320 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_QUIRK_BROKEN_HPA }, 4321 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_QUIRK_BROKEN_HPA }, 4322 { "MAXTOR 6L080L4", "A93.0500", ATA_QUIRK_BROKEN_HPA }, 4323 4324 /* this one allows HPA unlocking but fails IOs on the area */ 4325 { "OCZ-VERTEX", "1.30", ATA_QUIRK_BROKEN_HPA }, 4326 4327 /* Devices which report 1 sector over size HPA */ 4328 { "ST340823A", NULL, ATA_QUIRK_HPA_SIZE }, 4329 { "ST320413A", NULL, ATA_QUIRK_HPA_SIZE }, 4330 { "ST310211A", NULL, ATA_QUIRK_HPA_SIZE }, 4331 4332 /* Devices which get the IVB wrong */ 4333 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_QUIRK_IVB }, 4334 /* Maybe we should just add all TSSTcorp devices... */ 4335 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_QUIRK_IVB }, 4336 4337 /* Devices that do not need bridging limits applied */ 4338 { "MTRON MSP-SATA*", NULL, ATA_QUIRK_BRIDGE_OK }, 4339 { "BUFFALO HD-QSU2/R5", NULL, ATA_QUIRK_BRIDGE_OK }, 4340 { "QEMU HARDDISK", "2.5+", ATA_QUIRK_BRIDGE_OK }, 4341 4342 /* Devices which aren't very happy with higher link speeds */ 4343 { "WD My Book", NULL, ATA_QUIRK_1_5_GBPS }, 4344 { "Seagate FreeAgent GoFlex", NULL, ATA_QUIRK_1_5_GBPS }, 4345 4346 /* 4347 * Devices which choke on SETXFER. Applies only if both the 4348 * device and controller are SATA. 4349 */ 4350 { "PIONEER DVD-RW DVRTD08", NULL, ATA_QUIRK_NOSETXFER }, 4351 { "PIONEER DVD-RW DVRTD08A", NULL, ATA_QUIRK_NOSETXFER }, 4352 { "PIONEER DVD-RW DVR-215", NULL, ATA_QUIRK_NOSETXFER }, 4353 { "PIONEER DVD-RW DVR-212D", NULL, ATA_QUIRK_NOSETXFER }, 4354 { "PIONEER DVD-RW DVR-216D", NULL, ATA_QUIRK_NOSETXFER }, 4355 4356 /* These specific Pioneer models have LPM issues */ 4357 { "PIONEER BD-RW BDR-207M", NULL, ATA_QUIRK_NOLPM }, 4358 { "PIONEER BD-RW BDR-205", NULL, ATA_QUIRK_NOLPM }, 4359 4360 /* Crucial devices with broken LPM support */ 4361 { "CT*0BX*00SSD1", NULL, ATA_QUIRK_NOLPM }, 4362 4363 /* 512GB MX100 with MU01 firmware has both queued TRIM and LPM issues */ 4364 { "Crucial_CT512MX100*", "MU01", ATA_QUIRK_NO_NCQ_TRIM | 4365 ATA_QUIRK_ZERO_AFTER_TRIM | 4366 ATA_QUIRK_NOLPM }, 4367 /* 512GB MX100 with newer firmware has only LPM issues */ 4368 { "Crucial_CT512MX100*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM | 4369 ATA_QUIRK_NOLPM }, 4370 4371 /* 480GB+ M500 SSDs have both queued TRIM and LPM issues */ 4372 { "Crucial_CT480M500*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4373 ATA_QUIRK_ZERO_AFTER_TRIM | 4374 ATA_QUIRK_NOLPM }, 4375 { "Crucial_CT960M500*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4376 ATA_QUIRK_ZERO_AFTER_TRIM | 4377 ATA_QUIRK_NOLPM }, 4378 4379 /* AMD Radeon devices with broken LPM support */ 4380 { "R3SL240G", NULL, ATA_QUIRK_NOLPM }, 4381 4382 /* Apacer models with LPM issues */ 4383 { "Apacer AS340*", NULL, ATA_QUIRK_NOLPM }, 4384 4385 /* PNY CS900 (Phison PS3111-S11, DRAM-less) drops the link on DIPM */ 4386 { "PNY CS900 1TB SSD", NULL, ATA_QUIRK_NOLPM }, 4387 4388 /* Silicon Motion models with LPM issues */ 4389 { "MD619HXCLDE3TC", "TCVAID", ATA_QUIRK_NOLPM }, 4390 { "MD619GXCLDE3TC", "TCV35D", ATA_QUIRK_NOLPM }, 4391 4392 /* These specific Samsung models/firmware-revs do not handle LPM well */ 4393 { "SAMSUNG MZMPC128HBFU-000MV", "CXM14M1Q", ATA_QUIRK_NOLPM }, 4394 { "SAMSUNG SSD PM830 mSATA *", "CXM13D1Q", ATA_QUIRK_NOLPM }, 4395 { "SAMSUNG MZ7TD256HAFV-000L9", NULL, ATA_QUIRK_NOLPM }, 4396 { "SAMSUNG MZ7TE512HMHP-000L1", "EXT06L0Q", ATA_QUIRK_NOLPM }, 4397 4398 /* devices that don't properly handle queued TRIM commands */ 4399 { "Micron_M500IT_*", "MU01", ATA_QUIRK_NO_NCQ_TRIM | 4400 ATA_QUIRK_ZERO_AFTER_TRIM }, 4401 { "Micron_M500_*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4402 ATA_QUIRK_ZERO_AFTER_TRIM }, 4403 { "Micron_M5[15]0_*", "MU01", ATA_QUIRK_NO_NCQ_TRIM | 4404 ATA_QUIRK_ZERO_AFTER_TRIM }, 4405 { "Micron_1100_*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4406 ATA_QUIRK_ZERO_AFTER_TRIM, }, 4407 { "Crucial_CT*M500*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4408 ATA_QUIRK_ZERO_AFTER_TRIM }, 4409 { "Crucial_CT*M550*", "MU01", ATA_QUIRK_NO_NCQ_TRIM | 4410 ATA_QUIRK_ZERO_AFTER_TRIM }, 4411 { "Crucial_CT*MX100*", "MU01", ATA_QUIRK_NO_NCQ_TRIM | 4412 ATA_QUIRK_ZERO_AFTER_TRIM }, 4413 { "Samsung SSD 840 EVO*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4414 ATA_QUIRK_NO_DMA_LOG | 4415 ATA_QUIRK_ZERO_AFTER_TRIM }, 4416 { "Samsung SSD 840*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4417 ATA_QUIRK_ZERO_AFTER_TRIM }, 4418 { "Samsung SSD 850*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4419 ATA_QUIRK_ZERO_AFTER_TRIM }, 4420 { "Samsung SSD 860*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4421 ATA_QUIRK_ZERO_AFTER_TRIM | 4422 ATA_QUIRK_NO_NCQ_ON_ATI | 4423 ATA_QUIRK_NO_LPM_ON_ATI }, 4424 { "Samsung SSD 870*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4425 ATA_QUIRK_ZERO_AFTER_TRIM | 4426 ATA_QUIRK_NO_NCQ_ON_ATI | 4427 ATA_QUIRK_NO_LPM_ON_ATI }, 4428 { "SAMSUNG*MZ7LH*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4429 ATA_QUIRK_ZERO_AFTER_TRIM | 4430 ATA_QUIRK_NO_NCQ_ON_ATI | 4431 ATA_QUIRK_NO_LPM_ON_ATI }, 4432 { "FCCT*M500*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4433 ATA_QUIRK_ZERO_AFTER_TRIM }, 4434 4435 /* devices that don't properly handle TRIM commands */ 4436 { "SuperSSpeed S238*", NULL, ATA_QUIRK_NOTRIM }, 4437 { "M88V29*", NULL, ATA_QUIRK_NOTRIM }, 4438 4439 /* 4440 * As defined, the DRAT (Deterministic Read After Trim) and RZAT 4441 * (Return Zero After Trim) flags in the ATA Command Set are 4442 * unreliable in the sense that they only define what happens if 4443 * the device successfully executed the DSM TRIM command. TRIM 4444 * is only advisory, however, and the device is free to silently 4445 * ignore all or parts of the request. 4446 * 4447 * Whitelist drives that are known to reliably return zeroes 4448 * after TRIM. 4449 */ 4450 4451 /* 4452 * The intel 510 drive has buggy DRAT/RZAT. Explicitly exclude 4453 * that model before whitelisting all other intel SSDs. 4454 */ 4455 { "INTEL*SSDSC2MH*", NULL, 0 }, 4456 4457 { "Micron*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4458 { "Crucial*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4459 { "INTEL SSDSC2KG480G8", "XCV10120", ATA_QUIRK_ZERO_AFTER_TRIM | 4460 ATA_QUIRK_MAX_SEC }, 4461 { "INTEL*SSD*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4462 { "SSD*INTEL*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4463 { "Samsung*SSD*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4464 { "SAMSUNG*SSD*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4465 { "SAMSUNG*MZ7KM*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4466 { "ST[1248][0248]0[FH]*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4467 4468 /* 4469 * Some WD SATA-I drives spin up and down erratically when the link 4470 * is put into the slumber mode. We don't have full list of the 4471 * affected devices. Disable LPM if the device matches one of the 4472 * known prefixes and is SATA-1. As a side effect LPM partial is 4473 * lost too. 4474 * 4475 * https://bugzilla.kernel.org/show_bug.cgi?id=57211 4476 */ 4477 { "WDC WD800JD-*", NULL, ATA_QUIRK_WD_BROKEN_LPM }, 4478 { "WDC WD1200JD-*", NULL, ATA_QUIRK_WD_BROKEN_LPM }, 4479 { "WDC WD1600JD-*", NULL, ATA_QUIRK_WD_BROKEN_LPM }, 4480 { "WDC WD2000JD-*", NULL, ATA_QUIRK_WD_BROKEN_LPM }, 4481 { "WDC WD2500JD-*", NULL, ATA_QUIRK_WD_BROKEN_LPM }, 4482 { "WDC WD3000JD-*", NULL, ATA_QUIRK_WD_BROKEN_LPM }, 4483 { "WDC WD3200JD-*", NULL, ATA_QUIRK_WD_BROKEN_LPM }, 4484 4485 /* 4486 * WD drives with LPM issues (irrespective of supported SATA speeds). 4487 * (Unlike ATA_QUIRK_WD_BROKEN_LPM, which is only applied if the drive 4488 * exposes SATA Gen1 speed support, and SATA Gen1 speed support only.) 4489 */ 4490 { "WDC WD100EFGX-68CPLN0", NULL, ATA_QUIRK_NOLPM }, 4491 { "WDC WD102KFBX-68M95N0", NULL, ATA_QUIRK_NOLPM }, 4492 { "WDC WD141KFGX-68FH9N0", NULL, ATA_QUIRK_NOLPM }, 4493 { "WD Green 2.5 480GB", NULL, ATA_QUIRK_NOLPM }, 4494 4495 /* 4496 * This sata dom device goes on a walkabout when the ATA_LOG_DIRECTORY 4497 * log page is accessed. Ensure we never ask for this log page with 4498 * these devices. 4499 */ 4500 { "SATADOM-ML 3ME", NULL, ATA_QUIRK_NO_LOG_DIR }, 4501 4502 /* Buggy FUA */ 4503 { "Maxtor", "BANC1G10", ATA_QUIRK_NO_FUA }, 4504 { "WDC*WD2500J*", NULL, ATA_QUIRK_NO_FUA }, 4505 { "OCZ-VERTEX*", NULL, ATA_QUIRK_NO_FUA }, 4506 { "INTEL*SSDSC2CT*", NULL, ATA_QUIRK_NO_FUA }, 4507 4508 /* End Marker */ 4509 { } 4510 }; 4511 4512 static u64 ata_dev_quirks(const struct ata_device *dev) 4513 { 4514 unsigned char model_num[ATA_ID_PROD_LEN + 1]; 4515 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; 4516 const struct ata_dev_quirks_entry *ad = __ata_dev_quirks; 4517 4518 /* dev->quirks is an u64. */ 4519 BUILD_BUG_ON(__ATA_QUIRK_MAX > 64); 4520 4521 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 4522 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); 4523 4524 while (ad->model_num) { 4525 if (glob_match(ad->model_num, model_num) && 4526 (!ad->model_rev || glob_match(ad->model_rev, model_rev))) { 4527 ata_dev_print_quirks(dev, model_num, model_rev, 4528 ad->quirks); 4529 return ad->quirks; 4530 } 4531 ad++; 4532 } 4533 return 0; 4534 } 4535 4536 static u64 ata_dev_get_max_sec_quirk_value(struct ata_device *dev) 4537 { 4538 unsigned char model_num[ATA_ID_PROD_LEN + 1]; 4539 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; 4540 const struct ata_dev_quirk_value *ad = __ata_dev_max_sec_quirks; 4541 u64 val = 0; 4542 4543 #ifdef CONFIG_ATA_FORCE 4544 const struct ata_force_ent *fe = ata_force_get_fe_for_dev(dev); 4545 if (fe && (fe->param.quirk_on & ATA_QUIRK_MAX_SEC) && fe->param.value) 4546 val = fe->param.value; 4547 #endif 4548 if (val) 4549 goto out; 4550 4551 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 4552 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); 4553 4554 while (ad->model_num) { 4555 if (glob_match(ad->model_num, model_num) && 4556 (!ad->model_rev || glob_match(ad->model_rev, model_rev))) { 4557 val = ad->val; 4558 break; 4559 } 4560 ad++; 4561 } 4562 4563 out: 4564 ata_dev_warn(dev, "%s quirk is using value: %llu\n", 4565 ata_quirk_names[__ATA_QUIRK_MAX_SEC], val); 4566 4567 return val; 4568 } 4569 4570 static u64 ata_dev_get_quirk_value(struct ata_device *dev, u64 quirk) 4571 { 4572 if (quirk == ATA_QUIRK_MAX_SEC) 4573 return ata_dev_get_max_sec_quirk_value(dev); 4574 4575 return 0; 4576 } 4577 4578 static bool ata_dev_nodma(const struct ata_device *dev) 4579 { 4580 /* 4581 * We do not support polling DMA. Deny DMA for those ATAPI devices 4582 * with CDB-intr (and use PIO) if the LLDD handles only interrupts in 4583 * the HSM_ST_LAST state. 4584 */ 4585 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && 4586 (dev->flags & ATA_DFLAG_CDB_INTR)) 4587 return true; 4588 return dev->quirks & ATA_QUIRK_NODMA; 4589 } 4590 4591 /** 4592 * ata_is_40wire - check drive side detection 4593 * @dev: device 4594 * 4595 * Perform drive side detection decoding, allowing for device vendors 4596 * who can't follow the documentation. 4597 */ 4598 4599 static int ata_is_40wire(struct ata_device *dev) 4600 { 4601 if (dev->quirks & ATA_QUIRK_IVB) 4602 return ata_drive_40wire_relaxed(dev->id); 4603 return ata_drive_40wire(dev->id); 4604 } 4605 4606 /** 4607 * cable_is_40wire - 40/80/SATA decider 4608 * @ap: port to consider 4609 * 4610 * This function encapsulates the policy for speed management 4611 * in one place. At the moment we don't cache the result but 4612 * there is a good case for setting ap->cbl to the result when 4613 * we are called with unknown cables (and figuring out if it 4614 * impacts hotplug at all). 4615 * 4616 * Return 1 if the cable appears to be 40 wire. 4617 */ 4618 4619 static int cable_is_40wire(struct ata_port *ap) 4620 { 4621 struct ata_link *link; 4622 struct ata_device *dev; 4623 4624 /* If the controller thinks we are 40 wire, we are. */ 4625 if (ap->cbl == ATA_CBL_PATA40) 4626 return 1; 4627 4628 /* If the controller thinks we are 80 wire, we are. */ 4629 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA) 4630 return 0; 4631 4632 /* If the system is known to be 40 wire short cable (eg 4633 * laptop), then we allow 80 wire modes even if the drive 4634 * isn't sure. 4635 */ 4636 if (ap->cbl == ATA_CBL_PATA40_SHORT) 4637 return 0; 4638 4639 /* If the controller doesn't know, we scan. 4640 * 4641 * Note: We look for all 40 wire detects at this point. Any 4642 * 80 wire detect is taken to be 80 wire cable because 4643 * - in many setups only the one drive (slave if present) will 4644 * give a valid detect 4645 * - if you have a non detect capable drive you don't want it 4646 * to colour the choice 4647 */ 4648 ata_for_each_link(link, ap, EDGE) { 4649 ata_for_each_dev(dev, link, ENABLED) { 4650 if (!ata_is_40wire(dev)) 4651 return 0; 4652 } 4653 } 4654 return 1; 4655 } 4656 4657 /** 4658 * ata_dev_xfermask - Compute supported xfermask of the given device 4659 * @dev: Device to compute xfermask for 4660 * 4661 * Compute supported xfermask of @dev and store it in 4662 * dev->*_mask. This function is responsible for applying all 4663 * known limits including host controller limits, device quirks, etc... 4664 * 4665 * LOCKING: 4666 * None. 4667 */ 4668 static void ata_dev_xfermask(struct ata_device *dev) 4669 { 4670 struct ata_link *link = dev->link; 4671 struct ata_port *ap = link->ap; 4672 struct ata_host *host = ap->host; 4673 unsigned int xfer_mask; 4674 4675 /* controller modes available */ 4676 xfer_mask = ata_pack_xfermask(ap->pio_mask, 4677 ap->mwdma_mask, ap->udma_mask); 4678 4679 /* drive modes available */ 4680 xfer_mask &= ata_pack_xfermask(dev->pio_mask, 4681 dev->mwdma_mask, dev->udma_mask); 4682 xfer_mask &= ata_id_xfermask(dev->id); 4683 4684 /* 4685 * CFA Advanced TrueIDE timings are not allowed on a shared 4686 * cable 4687 */ 4688 if (ata_dev_pair(dev)) { 4689 /* No PIO5 or PIO6 */ 4690 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); 4691 /* No MWDMA3 or MWDMA 4 */ 4692 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); 4693 } 4694 4695 if (ata_dev_nodma(dev)) { 4696 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 4697 ata_dev_warn(dev, 4698 "device does not support DMA, disabling DMA\n"); 4699 } 4700 4701 if ((host->flags & ATA_HOST_SIMPLEX) && 4702 host->simplex_claimed && host->simplex_claimed != ap) { 4703 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 4704 ata_dev_warn(dev, 4705 "simplex DMA is claimed by other device, disabling DMA\n"); 4706 } 4707 4708 if (ap->flags & ATA_FLAG_NO_IORDY) 4709 xfer_mask &= ata_pio_mask_no_iordy(dev); 4710 4711 if (ap->ops->mode_filter) 4712 xfer_mask = ap->ops->mode_filter(dev, xfer_mask); 4713 4714 /* Apply cable rule here. Don't apply it early because when 4715 * we handle hot plug the cable type can itself change. 4716 * Check this last so that we know if the transfer rate was 4717 * solely limited by the cable. 4718 * Unknown or 80 wire cables reported host side are checked 4719 * drive side as well. Cases where we know a 40wire cable 4720 * is used safely for 80 are not checked here. 4721 */ 4722 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) 4723 /* UDMA/44 or higher would be available */ 4724 if (cable_is_40wire(ap)) { 4725 ata_dev_warn(dev, 4726 "limited to UDMA/33 due to 40-wire cable\n"); 4727 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); 4728 } 4729 4730 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, 4731 &dev->mwdma_mask, &dev->udma_mask); 4732 } 4733 4734 /** 4735 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command 4736 * @dev: Device to which command will be sent 4737 * 4738 * Issue SET FEATURES - XFER MODE command to device @dev 4739 * on port @ap. 4740 * 4741 * LOCKING: 4742 * PCI/etc. bus probe sem. 4743 * 4744 * RETURNS: 4745 * 0 on success, AC_ERR_* mask otherwise. 4746 */ 4747 4748 static unsigned int ata_dev_set_xfermode(struct ata_device *dev) 4749 { 4750 struct ata_taskfile tf; 4751 4752 /* set up set-features taskfile */ 4753 ata_dev_dbg(dev, "set features - xfer mode\n"); 4754 4755 /* Some controllers and ATAPI devices show flaky interrupt 4756 * behavior after setting xfer mode. Use polling instead. 4757 */ 4758 ata_tf_init(dev, &tf); 4759 tf.command = ATA_CMD_SET_FEATURES; 4760 tf.feature = SETFEATURES_XFER; 4761 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; 4762 tf.protocol = ATA_PROT_NODATA; 4763 /* If we are using IORDY we must send the mode setting command */ 4764 if (ata_pio_need_iordy(dev)) 4765 tf.nsect = dev->xfer_mode; 4766 /* If the device has IORDY and the controller does not - turn it off */ 4767 else if (ata_id_has_iordy(dev->id)) 4768 tf.nsect = 0x01; 4769 else /* In the ancient relic department - skip all of this */ 4770 return 0; 4771 4772 /* 4773 * On some disks, this command causes spin-up, so we need longer 4774 * timeout. 4775 */ 4776 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 15000); 4777 } 4778 4779 /** 4780 * ata_dev_set_feature - Issue SET FEATURES 4781 * @dev: Device to which command will be sent 4782 * @subcmd: The SET FEATURES subcommand to be sent 4783 * @action: The sector count represents a subcommand specific action 4784 * 4785 * Issue SET FEATURES command to device @dev on port @ap with sector count 4786 * 4787 * LOCKING: 4788 * PCI/etc. bus probe sem. 4789 * 4790 * RETURNS: 4791 * 0 on success, AC_ERR_* mask otherwise. 4792 */ 4793 unsigned int ata_dev_set_feature(struct ata_device *dev, u8 subcmd, u8 action) 4794 { 4795 struct ata_taskfile tf; 4796 unsigned int timeout = 0; 4797 4798 /* set up set-features taskfile */ 4799 ata_dev_dbg(dev, "set features\n"); 4800 4801 ata_tf_init(dev, &tf); 4802 tf.command = ATA_CMD_SET_FEATURES; 4803 tf.feature = subcmd; 4804 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 4805 tf.protocol = ATA_PROT_NODATA; 4806 tf.nsect = action; 4807 4808 if (subcmd == SETFEATURES_SPINUP) 4809 timeout = ata_probe_timeout ? 4810 ata_probe_timeout * 1000 : SETFEATURES_SPINUP_TIMEOUT; 4811 4812 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, timeout); 4813 } 4814 EXPORT_SYMBOL_GPL(ata_dev_set_feature); 4815 4816 /** 4817 * ata_dev_init_params - Issue INIT DEV PARAMS command 4818 * @dev: Device to which command will be sent 4819 * @heads: Number of heads (taskfile parameter) 4820 * @sectors: Number of sectors (taskfile parameter) 4821 * 4822 * LOCKING: 4823 * Kernel thread context (may sleep) 4824 * 4825 * RETURNS: 4826 * 0 on success, AC_ERR_* mask otherwise. 4827 */ 4828 static unsigned int ata_dev_init_params(struct ata_device *dev, 4829 u16 heads, u16 sectors) 4830 { 4831 struct ata_taskfile tf; 4832 unsigned int err_mask; 4833 4834 /* Number of sectors per track 1-255. Number of heads 1-16 */ 4835 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) 4836 return AC_ERR_INVALID; 4837 4838 /* set up init dev params taskfile */ 4839 ata_dev_dbg(dev, "init dev params\n"); 4840 4841 ata_tf_init(dev, &tf); 4842 tf.command = ATA_CMD_INIT_DEV_PARAMS; 4843 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 4844 tf.protocol = ATA_PROT_NODATA; 4845 tf.nsect = sectors; 4846 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ 4847 4848 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 4849 /* A clean abort indicates an original or just out of spec drive 4850 and we should continue as we issue the setup based on the 4851 drive reported working geometry */ 4852 if (err_mask == AC_ERR_DEV && (tf.error & ATA_ABORTED)) 4853 err_mask = 0; 4854 4855 return err_mask; 4856 } 4857 4858 /** 4859 * atapi_check_dma - Check whether ATAPI DMA can be supported 4860 * @qc: Metadata associated with taskfile to check 4861 * 4862 * Allow low-level driver to filter ATA PACKET commands, returning 4863 * a status indicating whether or not it is OK to use DMA for the 4864 * supplied PACKET command. 4865 * 4866 * LOCKING: 4867 * spin_lock_irqsave(host lock) 4868 * 4869 * RETURNS: 0 when ATAPI DMA can be used 4870 * nonzero otherwise 4871 */ 4872 int atapi_check_dma(struct ata_queued_cmd *qc) 4873 { 4874 struct ata_port *ap = qc->ap; 4875 4876 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a 4877 * few ATAPI devices choke on such DMA requests. 4878 */ 4879 if (!(qc->dev->quirks & ATA_QUIRK_ATAPI_MOD16_DMA) && 4880 unlikely(qc->nbytes & 15)) 4881 return -EOPNOTSUPP; 4882 4883 if (ap->ops->check_atapi_dma) 4884 return ap->ops->check_atapi_dma(qc); 4885 4886 return 0; 4887 } 4888 4889 /** 4890 * ata_std_qc_defer - Check whether a qc needs to be deferred 4891 * @qc: ATA command in question 4892 * 4893 * Non-NCQ commands cannot run with any other command, NCQ or 4894 * not. As upper layer only knows the queue depth, we are 4895 * responsible for maintaining exclusion. This function checks 4896 * whether a new command @qc can be issued. 4897 * 4898 * LOCKING: 4899 * spin_lock_irqsave(host lock) 4900 * 4901 * RETURNS: 4902 * ATA_DEFER_* if deferring is needed, 0 otherwise. 4903 */ 4904 int ata_std_qc_defer(struct ata_queued_cmd *qc) 4905 { 4906 struct ata_link *link = qc->dev->link; 4907 4908 if (ata_is_ncq(qc->tf.protocol)) { 4909 if (!ata_tag_valid(link->active_tag)) 4910 return 0; 4911 } else { 4912 if (!ata_tag_valid(link->active_tag) && !link->sactive) 4913 return 0; 4914 } 4915 4916 return ATA_DEFER_LINK; 4917 } 4918 EXPORT_SYMBOL_GPL(ata_std_qc_defer); 4919 4920 /** 4921 * ata_sg_init - Associate command with scatter-gather table. 4922 * @qc: Command to be associated 4923 * @sg: Scatter-gather table. 4924 * @n_elem: Number of elements in s/g table. 4925 * 4926 * Initialize the data-related elements of queued_cmd @qc 4927 * to point to a scatter-gather table @sg, containing @n_elem 4928 * elements. 4929 * 4930 * LOCKING: 4931 * spin_lock_irqsave(host lock) 4932 */ 4933 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 4934 unsigned int n_elem) 4935 { 4936 qc->sg = sg; 4937 qc->n_elem = n_elem; 4938 qc->cursg = qc->sg; 4939 } 4940 4941 #ifdef CONFIG_HAS_DMA 4942 4943 /** 4944 * ata_sg_clean - Unmap DMA memory associated with command 4945 * @qc: Command containing DMA memory to be released 4946 * 4947 * Unmap all mapped DMA memory associated with this command. 4948 * 4949 * LOCKING: 4950 * spin_lock_irqsave(host lock) 4951 */ 4952 static void ata_sg_clean(struct ata_queued_cmd *qc) 4953 { 4954 struct ata_port *ap = qc->ap; 4955 struct scatterlist *sg = qc->sg; 4956 int dir = qc->dma_dir; 4957 4958 WARN_ON_ONCE(sg == NULL); 4959 4960 if (qc->n_elem) 4961 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir); 4962 4963 qc->flags &= ~ATA_QCFLAG_DMAMAP; 4964 qc->sg = NULL; 4965 } 4966 4967 /** 4968 * ata_sg_setup - DMA-map the scatter-gather table associated with a command. 4969 * @qc: Command with scatter-gather table to be mapped. 4970 * 4971 * DMA-map the scatter-gather table associated with queued_cmd @qc. 4972 * 4973 * LOCKING: 4974 * spin_lock_irqsave(host lock) 4975 * 4976 * RETURNS: 4977 * Zero on success, negative on error. 4978 * 4979 */ 4980 static int ata_sg_setup(struct ata_queued_cmd *qc) 4981 { 4982 struct ata_port *ap = qc->ap; 4983 unsigned int n_elem; 4984 4985 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir); 4986 if (n_elem < 1) 4987 return -1; 4988 4989 qc->orig_n_elem = qc->n_elem; 4990 qc->n_elem = n_elem; 4991 qc->flags |= ATA_QCFLAG_DMAMAP; 4992 4993 return 0; 4994 } 4995 4996 #else /* !CONFIG_HAS_DMA */ 4997 4998 static inline void ata_sg_clean(struct ata_queued_cmd *qc) {} 4999 static inline int ata_sg_setup(struct ata_queued_cmd *qc) { return -1; } 5000 5001 #endif /* !CONFIG_HAS_DMA */ 5002 5003 /** 5004 * swap_buf_le16 - swap halves of 16-bit words in place 5005 * @buf: Buffer to swap 5006 * @buf_words: Number of 16-bit words in buffer. 5007 * 5008 * Swap halves of 16-bit words if needed to convert from 5009 * little-endian byte order to native cpu byte order, or 5010 * vice-versa. 5011 * 5012 * LOCKING: 5013 * Inherited from caller. 5014 */ 5015 void swap_buf_le16(u16 *buf, unsigned int buf_words) 5016 { 5017 #ifdef __BIG_ENDIAN 5018 unsigned int i; 5019 5020 for (i = 0; i < buf_words; i++) 5021 buf[i] = le16_to_cpu(buf[i]); 5022 #endif /* __BIG_ENDIAN */ 5023 } 5024 5025 /** 5026 * ata_qc_free - free unused ata_queued_cmd 5027 * @qc: Command to complete 5028 * 5029 * Designed to free unused ata_queued_cmd object 5030 * in case something prevents using it. 5031 * 5032 * LOCKING: 5033 * spin_lock_irqsave(host lock) 5034 */ 5035 void ata_qc_free(struct ata_queued_cmd *qc) 5036 { 5037 qc->flags = 0; 5038 if (ata_tag_valid(qc->tag)) 5039 qc->tag = ATA_TAG_POISON; 5040 } 5041 5042 void __ata_qc_complete(struct ata_queued_cmd *qc) 5043 { 5044 struct ata_port *ap; 5045 struct ata_link *link; 5046 5047 if (WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE))) 5048 return; 5049 5050 ap = qc->ap; 5051 link = qc->dev->link; 5052 5053 if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) 5054 ata_sg_clean(qc); 5055 5056 /* command should be marked inactive atomically with qc completion */ 5057 if (ata_is_ncq(qc->tf.protocol)) { 5058 link->sactive &= ~(1 << qc->hw_tag); 5059 if (!link->sactive) 5060 ap->nr_active_links--; 5061 } else { 5062 link->active_tag = ATA_TAG_POISON; 5063 ap->nr_active_links--; 5064 } 5065 5066 /* clear exclusive status */ 5067 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && 5068 ap->excl_link == link)) 5069 ap->excl_link = NULL; 5070 5071 /* 5072 * Mark qc as inactive to prevent the port interrupt handler from 5073 * completing the command twice later, before the error handler is 5074 * called. 5075 */ 5076 qc->flags &= ~ATA_QCFLAG_ACTIVE; 5077 ap->qc_active &= ~(1ULL << qc->tag); 5078 5079 /* call completion callback */ 5080 qc->complete_fn(qc); 5081 } 5082 5083 static void fill_result_tf(struct ata_queued_cmd *qc) 5084 { 5085 struct ata_port *ap = qc->ap; 5086 5087 /* 5088 * rtf may already be filled (e.g. for successful NCQ commands). 5089 * If that is the case, we have nothing to do. 5090 */ 5091 if (qc->flags & ATA_QCFLAG_RTF_FILLED) 5092 return; 5093 5094 qc->result_tf.flags = qc->tf.flags; 5095 ap->ops->qc_fill_rtf(qc); 5096 qc->flags |= ATA_QCFLAG_RTF_FILLED; 5097 } 5098 5099 static void ata_verify_xfer(struct ata_queued_cmd *qc) 5100 { 5101 struct ata_device *dev = qc->dev; 5102 5103 if (!ata_is_data(qc->tf.protocol)) 5104 return; 5105 5106 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol)) 5107 return; 5108 5109 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER; 5110 } 5111 5112 /** 5113 * ata_qc_complete - Complete an active ATA command 5114 * @qc: Command to complete 5115 * 5116 * Indicate to the mid and upper layers that an ATA command has 5117 * completed, with either an ok or not-ok status. 5118 * 5119 * Refrain from calling this function multiple times when 5120 * successfully completing multiple NCQ commands. 5121 * ata_qc_complete_multiple() should be used instead, which will 5122 * properly update IRQ expect state. 5123 * 5124 * LOCKING: 5125 * spin_lock_irqsave(host lock) 5126 */ 5127 void ata_qc_complete(struct ata_queued_cmd *qc) 5128 { 5129 struct ata_port *ap = qc->ap; 5130 struct ata_device *dev = qc->dev; 5131 struct ata_eh_info *ehi = &dev->link->eh_info; 5132 5133 /* Trigger the LED (if available) */ 5134 ledtrig_disk_activity(!!(qc->tf.flags & ATA_TFLAG_WRITE)); 5135 5136 /* 5137 * In order to synchronize EH with the regular execution path, a qc that 5138 * is owned by EH is marked with ATA_QCFLAG_EH. 5139 * 5140 * The normal execution path is responsible for not accessing a qc owned 5141 * by EH. libata core enforces the rule by returning NULL from 5142 * ata_qc_from_tag() for qcs owned by EH. 5143 */ 5144 if (unlikely(qc->err_mask)) 5145 qc->flags |= ATA_QCFLAG_EH; 5146 5147 /* 5148 * Finish internal commands without any further processing and always 5149 * with the result TF filled. 5150 */ 5151 if (unlikely(ata_tag_internal(qc->tag))) { 5152 fill_result_tf(qc); 5153 trace_ata_qc_complete_internal(qc); 5154 __ata_qc_complete(qc); 5155 return; 5156 } 5157 5158 /* Non-internal qc has failed. Fill the result TF and summon EH. */ 5159 if (unlikely(qc->flags & ATA_QCFLAG_EH)) { 5160 fill_result_tf(qc); 5161 trace_ata_qc_complete_failed(qc); 5162 ata_qc_schedule_eh(qc); 5163 return; 5164 } 5165 5166 WARN_ON_ONCE(ata_port_is_frozen(ap)); 5167 5168 /* read result TF if requested */ 5169 if (qc->flags & ATA_QCFLAG_RESULT_TF) 5170 fill_result_tf(qc); 5171 5172 trace_ata_qc_complete_done(qc); 5173 5174 /* 5175 * For CDL commands that completed without an error, check if we have 5176 * sense data (ATA_SENSE is set). If we do, then the command may have 5177 * been aborted by the device due to a limit timeout using the policy 5178 * 0xD. For these commands, invoke EH to get the command sense data. 5179 */ 5180 if (qc->flags & ATA_QCFLAG_HAS_CDL && 5181 qc->result_tf.status & ATA_SENSE) { 5182 /* 5183 * Tell SCSI EH to not overwrite scmd->result even if this 5184 * command is finished with result SAM_STAT_GOOD. 5185 */ 5186 qc->scsicmd->flags |= SCMD_FORCE_EH_SUCCESS; 5187 qc->flags |= ATA_QCFLAG_EH_SUCCESS_CMD; 5188 ehi->dev_action[dev->devno] |= ATA_EH_GET_SUCCESS_SENSE; 5189 5190 /* 5191 * set pending so that ata_qc_schedule_eh() does not trigger 5192 * fast drain, and freeze the port. 5193 */ 5194 ap->pflags |= ATA_PFLAG_EH_PENDING; 5195 ata_qc_schedule_eh(qc); 5196 return; 5197 } 5198 5199 /* Some commands need post-processing after successful completion. */ 5200 switch (qc->tf.command) { 5201 case ATA_CMD_SET_FEATURES: 5202 if (qc->tf.feature != SETFEATURES_WC_ON && 5203 qc->tf.feature != SETFEATURES_WC_OFF && 5204 qc->tf.feature != SETFEATURES_RA_ON && 5205 qc->tf.feature != SETFEATURES_RA_OFF) 5206 break; 5207 fallthrough; 5208 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */ 5209 case ATA_CMD_SET_MULTI: /* multi_count changed */ 5210 /* revalidate device */ 5211 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE; 5212 ata_port_schedule_eh(ap); 5213 break; 5214 5215 case ATA_CMD_SLEEP: 5216 dev->flags |= ATA_DFLAG_SLEEPING; 5217 break; 5218 } 5219 5220 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) 5221 ata_verify_xfer(qc); 5222 5223 __ata_qc_complete(qc); 5224 } 5225 EXPORT_SYMBOL_GPL(ata_qc_complete); 5226 5227 /** 5228 * ata_qc_get_active - get bitmask of active qcs 5229 * @ap: port in question 5230 * 5231 * LOCKING: 5232 * spin_lock_irqsave(host lock) 5233 * 5234 * RETURNS: 5235 * Bitmask of active qcs 5236 */ 5237 u64 ata_qc_get_active(struct ata_port *ap) 5238 { 5239 u64 qc_active = ap->qc_active; 5240 5241 /* ATA_TAG_INTERNAL is sent to hw as tag 0 */ 5242 if (qc_active & (1ULL << ATA_TAG_INTERNAL)) { 5243 qc_active |= (1 << 0); 5244 qc_active &= ~(1ULL << ATA_TAG_INTERNAL); 5245 } 5246 5247 return qc_active; 5248 } 5249 EXPORT_SYMBOL_GPL(ata_qc_get_active); 5250 5251 /** 5252 * ata_qc_issue - issue taskfile to device 5253 * @ap: ATA port of interest 5254 * @qc: command to issue to device 5255 * 5256 * Prepare an ATA command to submission to device. 5257 * This includes mapping the data into a DMA-able 5258 * area, filling in the S/G table, and finally 5259 * writing the taskfile to hardware, starting the command. 5260 * 5261 * LOCKING: 5262 * spin_lock_irqsave(host lock) 5263 */ 5264 void ata_qc_issue(struct ata_port *ap, struct ata_queued_cmd *qc) 5265 __must_hold(ap->lock) 5266 { 5267 struct ata_link *link = qc->dev->link; 5268 u8 prot = qc->tf.protocol; 5269 5270 /* 5271 * Make sure we have a valid tag and that only one non-NCQ command is 5272 * outstanding. 5273 */ 5274 if (WARN_ON_ONCE(!ata_tag_valid(qc->tag)) || 5275 WARN_ON_ONCE(ata_tag_valid(link->active_tag))) 5276 goto sys_err; 5277 5278 if (ata_is_ncq(prot)) { 5279 WARN_ON_ONCE(link->sactive & (1 << qc->hw_tag)); 5280 5281 if (!link->sactive) 5282 ap->nr_active_links++; 5283 link->sactive |= 1 << qc->hw_tag; 5284 } else { 5285 WARN_ON_ONCE(link->sactive); 5286 5287 ap->nr_active_links++; 5288 link->active_tag = qc->tag; 5289 } 5290 5291 qc->flags |= ATA_QCFLAG_ACTIVE; 5292 ap->qc_active |= 1ULL << qc->tag; 5293 5294 /* Make sure the device is still accessible. */ 5295 if (!ata_adapter_is_online(ap)) { 5296 qc->err_mask |= AC_ERR_HOST_BUS; 5297 goto sys_err; 5298 } 5299 5300 /* 5301 * We guarantee to LLDs that they will have at least one 5302 * non-zero sg if the command is a data command. 5303 */ 5304 if (ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes)) 5305 goto sys_err; 5306 5307 if (ata_is_dma(prot) || (ata_is_pio(prot) && 5308 (ap->flags & ATA_FLAG_PIO_DMA))) 5309 if (ata_sg_setup(qc)) 5310 goto sys_err; 5311 5312 /* if device is sleeping, schedule reset and abort the link */ 5313 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) { 5314 link->eh_info.action |= ATA_EH_RESET; 5315 ata_ehi_push_desc(&link->eh_info, "waking up from sleep"); 5316 ata_link_abort(link); 5317 return; 5318 } 5319 5320 if (ap->ops->qc_prep) { 5321 trace_ata_qc_prep(qc); 5322 qc->err_mask |= ap->ops->qc_prep(qc); 5323 if (unlikely(qc->err_mask)) 5324 goto err; 5325 } 5326 5327 trace_ata_qc_issue(qc); 5328 qc->err_mask |= ap->ops->qc_issue(qc); 5329 if (unlikely(qc->err_mask)) 5330 goto err; 5331 return; 5332 5333 sys_err: 5334 qc->err_mask |= AC_ERR_SYSTEM; 5335 err: 5336 ata_qc_complete(qc); 5337 } 5338 5339 /** 5340 * ata_phys_link_online - test whether the given link is online 5341 * @link: ATA link to test 5342 * 5343 * Test whether @link is online. Note that this function returns 5344 * 0 if online status of @link cannot be obtained, so 5345 * ata_link_online(link) != !ata_link_offline(link). 5346 * 5347 * LOCKING: 5348 * None. 5349 * 5350 * RETURNS: 5351 * True if the port online status is available and online. 5352 */ 5353 bool ata_phys_link_online(struct ata_link *link) 5354 { 5355 u32 sstatus; 5356 5357 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && 5358 ata_sstatus_online(sstatus)) 5359 return true; 5360 return false; 5361 } 5362 5363 /** 5364 * ata_phys_link_offline - test whether the given link is offline 5365 * @link: ATA link to test 5366 * 5367 * Test whether @link is offline. Note that this function 5368 * returns 0 if offline status of @link cannot be obtained, so 5369 * ata_link_online(link) != !ata_link_offline(link). 5370 * 5371 * LOCKING: 5372 * None. 5373 * 5374 * RETURNS: 5375 * True if the port offline status is available and offline. 5376 */ 5377 bool ata_phys_link_offline(struct ata_link *link) 5378 { 5379 u32 sstatus; 5380 5381 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && 5382 !ata_sstatus_online(sstatus)) 5383 return true; 5384 return false; 5385 } 5386 5387 /** 5388 * ata_link_online - test whether the given link is online 5389 * @link: ATA link to test 5390 * 5391 * Test whether @link is online. This is identical to 5392 * ata_phys_link_online() when there's no slave link. When 5393 * there's a slave link, this function should only be called on 5394 * the master link and will return true if any of M/S links is 5395 * online. 5396 * 5397 * LOCKING: 5398 * None. 5399 * 5400 * RETURNS: 5401 * True if the port online status is available and online. 5402 */ 5403 bool ata_link_online(struct ata_link *link) 5404 { 5405 struct ata_link *slave = link->ap->slave_link; 5406 5407 WARN_ON(link == slave); /* shouldn't be called on slave link */ 5408 5409 return ata_phys_link_online(link) || 5410 (slave && ata_phys_link_online(slave)); 5411 } 5412 EXPORT_SYMBOL_GPL(ata_link_online); 5413 5414 /** 5415 * ata_link_offline - test whether the given link is offline 5416 * @link: ATA link to test 5417 * 5418 * Test whether @link is offline. This is identical to 5419 * ata_phys_link_offline() when there's no slave link. When 5420 * there's a slave link, this function should only be called on 5421 * the master link and will return true if both M/S links are 5422 * offline. 5423 * 5424 * LOCKING: 5425 * None. 5426 * 5427 * RETURNS: 5428 * True if the port offline status is available and offline. 5429 */ 5430 bool ata_link_offline(struct ata_link *link) 5431 { 5432 struct ata_link *slave = link->ap->slave_link; 5433 5434 WARN_ON(link == slave); /* shouldn't be called on slave link */ 5435 5436 return ata_phys_link_offline(link) && 5437 (!slave || ata_phys_link_offline(slave)); 5438 } 5439 EXPORT_SYMBOL_GPL(ata_link_offline); 5440 5441 #ifdef CONFIG_PM 5442 static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg, 5443 unsigned int action, unsigned int ehi_flags, 5444 bool async) 5445 { 5446 struct ata_link *link; 5447 unsigned long flags; 5448 5449 spin_lock_irqsave(ap->lock, flags); 5450 5451 /* 5452 * A previous PM operation might still be in progress. Wait for 5453 * ATA_PFLAG_PM_PENDING to clear. 5454 */ 5455 if (ap->pflags & ATA_PFLAG_PM_PENDING) { 5456 spin_unlock_irqrestore(ap->lock, flags); 5457 ata_port_wait_eh(ap); 5458 spin_lock_irqsave(ap->lock, flags); 5459 } 5460 5461 /* Request PM operation to EH */ 5462 ap->pm_mesg = mesg; 5463 ap->pflags |= ATA_PFLAG_PM_PENDING; 5464 ata_for_each_link(link, ap, HOST_FIRST) { 5465 link->eh_info.action |= action; 5466 link->eh_info.flags |= ehi_flags; 5467 } 5468 5469 ata_port_schedule_eh(ap); 5470 5471 spin_unlock_irqrestore(ap->lock, flags); 5472 5473 if (!async) 5474 ata_port_wait_eh(ap); 5475 } 5476 5477 static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg, 5478 bool async) 5479 { 5480 /* 5481 * We are about to suspend the port, so we do not care about 5482 * scsi_rescan_device() calls scheduled by previous resume operations. 5483 * The next resume will schedule the rescan again. So cancel any rescan 5484 * that is not done yet. 5485 */ 5486 cancel_delayed_work_sync(&ap->scsi_rescan_task); 5487 5488 /* 5489 * On some hardware, device fails to respond after spun down for 5490 * suspend. As the device will not be used until being resumed, we 5491 * do not need to touch the device. Ask EH to skip the usual stuff 5492 * and proceed directly to suspend. 5493 * 5494 * http://thread.gmane.org/gmane.linux.ide/46764 5495 */ 5496 ata_port_request_pm(ap, mesg, 0, 5497 ATA_EHI_QUIET | ATA_EHI_NO_AUTOPSY | 5498 ATA_EHI_NO_RECOVERY, 5499 async); 5500 } 5501 5502 static int ata_port_pm_suspend(struct device *dev) 5503 { 5504 struct ata_port *ap = to_ata_port(dev); 5505 5506 if (pm_runtime_suspended(dev)) 5507 return 0; 5508 5509 ata_port_suspend(ap, PMSG_SUSPEND, false); 5510 return 0; 5511 } 5512 5513 static int ata_port_pm_freeze(struct device *dev) 5514 { 5515 struct ata_port *ap = to_ata_port(dev); 5516 5517 if (pm_runtime_suspended(dev)) 5518 return 0; 5519 5520 ata_port_suspend(ap, PMSG_FREEZE, false); 5521 return 0; 5522 } 5523 5524 static int ata_port_pm_poweroff(struct device *dev) 5525 { 5526 if (!pm_runtime_suspended(dev)) 5527 ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE, false); 5528 return 0; 5529 } 5530 5531 static void ata_port_resume(struct ata_port *ap, pm_message_t mesg, 5532 bool async) 5533 { 5534 ata_port_request_pm(ap, mesg, ATA_EH_RESET, 5535 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 5536 async); 5537 } 5538 5539 static int ata_port_pm_resume(struct device *dev) 5540 { 5541 if (!pm_runtime_suspended(dev)) 5542 ata_port_resume(to_ata_port(dev), PMSG_RESUME, true); 5543 return 0; 5544 } 5545 5546 /* 5547 * For ODDs, the upper layer will poll for media change every few seconds, 5548 * which will make it enter and leave suspend state every few seconds. And 5549 * as each suspend will cause a hard/soft reset, the gain of runtime suspend 5550 * is very little and the ODD may malfunction after constantly being reset. 5551 * So the idle callback here will not proceed to suspend if a non-ZPODD capable 5552 * ODD is attached to the port. 5553 */ 5554 static int ata_port_runtime_idle(struct device *dev) 5555 { 5556 struct ata_port *ap = to_ata_port(dev); 5557 struct ata_link *link; 5558 struct ata_device *adev; 5559 5560 ata_for_each_link(link, ap, HOST_FIRST) { 5561 ata_for_each_dev(adev, link, ENABLED) 5562 if (adev->class == ATA_DEV_ATAPI && 5563 !zpodd_dev_enabled(adev)) 5564 return -EBUSY; 5565 } 5566 5567 return 0; 5568 } 5569 5570 static int ata_port_runtime_suspend(struct device *dev) 5571 { 5572 ata_port_suspend(to_ata_port(dev), PMSG_AUTO_SUSPEND, false); 5573 return 0; 5574 } 5575 5576 static int ata_port_runtime_resume(struct device *dev) 5577 { 5578 ata_port_resume(to_ata_port(dev), PMSG_AUTO_RESUME, false); 5579 return 0; 5580 } 5581 5582 static const struct dev_pm_ops ata_port_pm_ops = { 5583 .suspend = ata_port_pm_suspend, 5584 .resume = ata_port_pm_resume, 5585 .freeze = ata_port_pm_freeze, 5586 .thaw = ata_port_pm_resume, 5587 .poweroff = ata_port_pm_poweroff, 5588 .restore = ata_port_pm_resume, 5589 5590 .runtime_suspend = ata_port_runtime_suspend, 5591 .runtime_resume = ata_port_runtime_resume, 5592 .runtime_idle = ata_port_runtime_idle, 5593 }; 5594 5595 /* sas ports don't participate in pm runtime management of ata_ports, 5596 * and need to resume ata devices at the domain level, not the per-port 5597 * level. sas suspend/resume is async to allow parallel port recovery 5598 * since sas has multiple ata_port instances per Scsi_Host. 5599 */ 5600 void ata_sas_port_suspend(struct ata_port *ap) 5601 { 5602 ata_port_suspend(ap, PMSG_SUSPEND, true); 5603 } 5604 EXPORT_SYMBOL_GPL(ata_sas_port_suspend); 5605 5606 void ata_sas_port_resume(struct ata_port *ap) 5607 { 5608 ata_port_resume(ap, PMSG_RESUME, true); 5609 } 5610 EXPORT_SYMBOL_GPL(ata_sas_port_resume); 5611 5612 /** 5613 * ata_host_suspend - suspend host 5614 * @host: host to suspend 5615 * @mesg: PM message 5616 * 5617 * Suspend @host. Actual operation is performed by port suspend. 5618 */ 5619 void ata_host_suspend(struct ata_host *host, pm_message_t mesg) 5620 { 5621 host->dev->power.power_state = mesg; 5622 } 5623 EXPORT_SYMBOL_GPL(ata_host_suspend); 5624 5625 /** 5626 * ata_host_resume - resume host 5627 * @host: host to resume 5628 * 5629 * Resume @host. Actual operation is performed by port resume. 5630 */ 5631 void ata_host_resume(struct ata_host *host) 5632 { 5633 host->dev->power.power_state = PMSG_ON; 5634 } 5635 EXPORT_SYMBOL_GPL(ata_host_resume); 5636 #endif 5637 5638 const struct device_type ata_port_type = { 5639 .name = ATA_PORT_TYPE_NAME, 5640 #ifdef CONFIG_PM 5641 .pm = &ata_port_pm_ops, 5642 #endif 5643 }; 5644 5645 /** 5646 * ata_dev_init - Initialize an ata_device structure 5647 * @dev: Device structure to initialize 5648 * 5649 * Initialize @dev in preparation for probing. 5650 * 5651 * LOCKING: 5652 * Inherited from caller. 5653 */ 5654 void ata_dev_init(struct ata_device *dev) 5655 { 5656 struct ata_link *link = ata_dev_phys_link(dev); 5657 struct ata_port *ap = link->ap; 5658 unsigned long flags; 5659 5660 /* SATA spd limit is bound to the attached device, reset together */ 5661 link->sata_spd_limit = link->hw_sata_spd_limit; 5662 link->sata_spd = 0; 5663 5664 /* High bits of dev->flags are used to record warm plug 5665 * requests which occur asynchronously. Synchronize using 5666 * host lock. 5667 */ 5668 spin_lock_irqsave(ap->lock, flags); 5669 dev->flags &= ~ATA_DFLAG_INIT_MASK; 5670 dev->quirks = 0; 5671 spin_unlock_irqrestore(ap->lock, flags); 5672 5673 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0, 5674 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN); 5675 dev->pio_mask = UINT_MAX; 5676 dev->mwdma_mask = UINT_MAX; 5677 dev->udma_mask = UINT_MAX; 5678 } 5679 5680 /** 5681 * ata_link_init - Initialize an ata_link structure 5682 * @ap: ATA port link is attached to 5683 * @link: Link structure to initialize 5684 * @pmp: Port multiplier port number 5685 * 5686 * Initialize @link. 5687 * 5688 * LOCKING: 5689 * Kernel thread context (may sleep) 5690 */ 5691 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) 5692 { 5693 int i; 5694 5695 /* clear everything except for devices */ 5696 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0, 5697 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN); 5698 5699 link->ap = ap; 5700 link->pmp = pmp; 5701 link->active_tag = ATA_TAG_POISON; 5702 link->hw_sata_spd_limit = UINT_MAX; 5703 INIT_WORK(&link->deferred_qc_work, ata_scsi_deferred_qc_work); 5704 5705 /* can't use iterator, ap isn't initialized yet */ 5706 for (i = 0; i < ATA_MAX_DEVICES; i++) { 5707 struct ata_device *dev = &link->device[i]; 5708 5709 dev->link = link; 5710 dev->devno = dev - link->device; 5711 #ifdef CONFIG_ATA_ACPI 5712 dev->gtf_filter = ata_acpi_gtf_filter; 5713 #endif 5714 ata_dev_init(dev); 5715 } 5716 } 5717 5718 /** 5719 * sata_link_init_spd - Initialize link->sata_spd_limit 5720 * @link: Link to configure sata_spd_limit for 5721 * 5722 * Initialize ``link->[hw_]sata_spd_limit`` to the currently 5723 * configured value. 5724 * 5725 * LOCKING: 5726 * Kernel thread context (may sleep). 5727 * 5728 * RETURNS: 5729 * 0 on success, -errno on failure. 5730 */ 5731 int sata_link_init_spd(struct ata_link *link) 5732 { 5733 u8 spd; 5734 int rc; 5735 5736 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol); 5737 if (rc) 5738 return rc; 5739 5740 spd = (link->saved_scontrol >> 4) & 0xf; 5741 if (spd) 5742 link->hw_sata_spd_limit &= (1 << spd) - 1; 5743 5744 ata_force_link_limits(link); 5745 5746 link->sata_spd_limit = link->hw_sata_spd_limit; 5747 5748 return 0; 5749 } 5750 5751 /** 5752 * ata_port_alloc - allocate and initialize basic ATA port resources 5753 * @host: ATA host this allocated port belongs to 5754 * 5755 * Allocate and initialize basic ATA port resources. 5756 * 5757 * RETURNS: 5758 * Allocate ATA port on success, NULL on failure. 5759 * 5760 * LOCKING: 5761 * Inherited from calling layer (may sleep). 5762 */ 5763 struct ata_port *ata_port_alloc(struct ata_host *host) 5764 { 5765 struct ata_port *ap; 5766 int id; 5767 5768 ap = kzalloc_obj(*ap); 5769 if (!ap) 5770 return NULL; 5771 5772 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN; 5773 ap->lock = &host->lock; 5774 id = ida_alloc_min(&ata_ida, 1, GFP_KERNEL); 5775 if (id < 0) { 5776 kfree(ap); 5777 return NULL; 5778 } 5779 ap->print_id = id; 5780 ap->host = host; 5781 ap->dev = host->dev; 5782 5783 mutex_init(&ap->scsi_scan_mutex); 5784 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); 5785 INIT_DELAYED_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); 5786 INIT_LIST_HEAD(&ap->eh_done_q); 5787 init_waitqueue_head(&ap->eh_wait_q); 5788 init_completion(&ap->park_req_pending); 5789 timer_setup(&ap->fastdrain_timer, ata_eh_fastdrain_timerfn, 5790 TIMER_DEFERRABLE); 5791 5792 ap->cbl = ATA_CBL_NONE; 5793 5794 ata_link_init(ap, &ap->link, 0); 5795 5796 #ifdef ATA_IRQ_TRAP 5797 ap->stats.unhandled_irq = 1; 5798 ap->stats.idle_irq = 1; 5799 #endif 5800 ata_sff_port_init(ap); 5801 5802 ata_force_pflags(ap); 5803 5804 return ap; 5805 } 5806 EXPORT_SYMBOL_GPL(ata_port_alloc); 5807 5808 void ata_port_free(struct ata_port *ap) 5809 { 5810 if (!ap) 5811 return; 5812 5813 kfree(ap->pmp_link); 5814 kfree(ap->slave_link); 5815 ida_free(&ata_ida, ap->print_id); 5816 kfree(ap); 5817 } 5818 EXPORT_SYMBOL_GPL(ata_port_free); 5819 5820 static void ata_devres_release(struct device *gendev, void *res) 5821 { 5822 struct ata_host *host = dev_get_drvdata(gendev); 5823 int i; 5824 5825 for (i = 0; i < host->n_ports; i++) { 5826 struct ata_port *ap = host->ports[i]; 5827 5828 if (!ap) 5829 continue; 5830 5831 if (ap->scsi_host) 5832 scsi_host_put(ap->scsi_host); 5833 5834 } 5835 5836 dev_set_drvdata(gendev, NULL); 5837 ata_host_put(host); 5838 } 5839 5840 static void ata_host_release(struct kref *kref) 5841 { 5842 struct ata_host *host = container_of(kref, struct ata_host, kref); 5843 int i; 5844 5845 for (i = 0; i < host->n_ports; i++) { 5846 ata_port_free(host->ports[i]); 5847 host->ports[i] = NULL; 5848 } 5849 kfree(host); 5850 } 5851 5852 void ata_host_get(struct ata_host *host) 5853 { 5854 kref_get(&host->kref); 5855 } 5856 5857 void ata_host_put(struct ata_host *host) 5858 { 5859 kref_put(&host->kref, ata_host_release); 5860 } 5861 EXPORT_SYMBOL_GPL(ata_host_put); 5862 5863 /** 5864 * ata_host_alloc - allocate and init basic ATA host resources 5865 * @dev: generic device this host is associated with 5866 * @n_ports: the number of ATA ports associated with this host 5867 * 5868 * Allocate and initialize basic ATA host resources. LLD calls 5869 * this function to allocate a host, initializes it fully and 5870 * attaches it using ata_host_register(). 5871 * 5872 * RETURNS: 5873 * Allocate ATA host on success, NULL on failure. 5874 * 5875 * LOCKING: 5876 * Inherited from calling layer (may sleep). 5877 */ 5878 struct ata_host *ata_host_alloc(struct device *dev, int n_ports) 5879 { 5880 struct ata_host *host; 5881 size_t sz; 5882 int i; 5883 void *dr; 5884 5885 /* alloc a container for our list of ATA ports (buses) */ 5886 sz = sizeof(struct ata_host) + n_ports * sizeof(void *); 5887 host = kzalloc(sz, GFP_KERNEL); 5888 if (!host) 5889 return NULL; 5890 5891 if (!devres_open_group(dev, NULL, GFP_KERNEL)) { 5892 kfree(host); 5893 return NULL; 5894 } 5895 5896 dr = devres_alloc(ata_devres_release, 0, GFP_KERNEL); 5897 if (!dr) { 5898 kfree(host); 5899 goto err_out; 5900 } 5901 5902 devres_add(dev, dr); 5903 dev_set_drvdata(dev, host); 5904 5905 spin_lock_init(&host->lock); 5906 mutex_init(&host->eh_mutex); 5907 host->dev = dev; 5908 host->n_ports = n_ports; 5909 kref_init(&host->kref); 5910 5911 /* allocate ports bound to this host */ 5912 for (i = 0; i < n_ports; i++) { 5913 struct ata_port *ap; 5914 5915 ap = ata_port_alloc(host); 5916 if (!ap) 5917 goto err_out; 5918 5919 ap->port_no = i; 5920 host->ports[i] = ap; 5921 } 5922 5923 devres_remove_group(dev, NULL); 5924 return host; 5925 5926 err_out: 5927 devres_release_group(dev, NULL); 5928 return NULL; 5929 } 5930 EXPORT_SYMBOL_GPL(ata_host_alloc); 5931 5932 /** 5933 * ata_host_alloc_pinfo - alloc host and init with port_info array 5934 * @dev: generic device this host is associated with 5935 * @ppi: array of ATA port_info to initialize host with 5936 * @n_ports: number of ATA ports attached to this host 5937 * 5938 * Allocate ATA host and initialize with info from @ppi. If NULL 5939 * terminated, @ppi may contain fewer entries than @n_ports. The 5940 * last entry will be used for the remaining ports. 5941 * 5942 * RETURNS: 5943 * Allocate ATA host on success, NULL on failure. 5944 * 5945 * LOCKING: 5946 * Inherited from calling layer (may sleep). 5947 */ 5948 struct ata_host *ata_host_alloc_pinfo(struct device *dev, 5949 const struct ata_port_info * const * ppi, 5950 int n_ports) 5951 { 5952 const struct ata_port_info *pi = &ata_dummy_port_info; 5953 struct ata_host *host; 5954 int i, j; 5955 5956 host = ata_host_alloc(dev, n_ports); 5957 if (!host) 5958 return NULL; 5959 5960 for (i = 0, j = 0; i < host->n_ports; i++) { 5961 struct ata_port *ap = host->ports[i]; 5962 5963 if (ppi[j]) 5964 pi = ppi[j++]; 5965 5966 ap->pio_mask = pi->pio_mask; 5967 ap->mwdma_mask = pi->mwdma_mask; 5968 ap->udma_mask = pi->udma_mask; 5969 ap->flags |= pi->flags; 5970 ap->link.flags |= pi->link_flags; 5971 ap->ops = pi->port_ops; 5972 5973 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) 5974 host->ops = pi->port_ops; 5975 } 5976 5977 return host; 5978 } 5979 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); 5980 5981 static void ata_host_stop(struct device *gendev, void *res) 5982 { 5983 struct ata_host *host = dev_get_drvdata(gendev); 5984 int i; 5985 5986 WARN_ON(!(host->flags & ATA_HOST_STARTED)); 5987 5988 for (i = 0; i < host->n_ports; i++) { 5989 struct ata_port *ap = host->ports[i]; 5990 5991 if (ap->ops->port_stop) 5992 ap->ops->port_stop(ap); 5993 } 5994 5995 if (host->ops->host_stop) 5996 host->ops->host_stop(host); 5997 } 5998 5999 /** 6000 * ata_finalize_port_ops - finalize ata_port_operations 6001 * @ops: ata_port_operations to finalize 6002 * 6003 * An ata_port_operations can inherit from another ops and that 6004 * ops can again inherit from another. This can go on as many 6005 * times as necessary as long as there is no loop in the 6006 * inheritance chain. 6007 * 6008 * Ops tables are finalized when the host is started. NULL or 6009 * unspecified entries are inherited from the closet ancestor 6010 * which has the method and the entry is populated with it. 6011 * After finalization, the ops table directly points to all the 6012 * methods and ->inherits is no longer necessary and cleared. 6013 * 6014 * Using ATA_OP_NULL, inheriting ops can force a method to NULL. 6015 * 6016 * LOCKING: 6017 * None. 6018 */ 6019 static void ata_finalize_port_ops(struct ata_port_operations *ops) 6020 { 6021 static DEFINE_SPINLOCK(lock); 6022 const struct ata_port_operations *cur; 6023 void **begin = (void **)ops; 6024 void **end = (void **)&ops->inherits; 6025 void **pp; 6026 6027 if (!ops || !ops->inherits) 6028 return; 6029 6030 spin_lock(&lock); 6031 6032 for (cur = ops->inherits; cur; cur = cur->inherits) { 6033 void **inherit = (void **)cur; 6034 6035 for (pp = begin; pp < end; pp++, inherit++) 6036 if (!*pp) 6037 *pp = *inherit; 6038 } 6039 6040 for (pp = begin; pp < end; pp++) 6041 if (IS_ERR(*pp)) 6042 *pp = NULL; 6043 6044 ops->inherits = NULL; 6045 6046 spin_unlock(&lock); 6047 } 6048 6049 /** 6050 * ata_host_start - start and freeze ports of an ATA host 6051 * @host: ATA host to start ports for 6052 * 6053 * Start and then freeze ports of @host. Started status is 6054 * recorded in host->flags, so this function can be called 6055 * multiple times. Ports are guaranteed to get started only 6056 * once. If host->ops is not initialized yet, it is set to the 6057 * first non-dummy port ops. 6058 * 6059 * LOCKING: 6060 * Inherited from calling layer (may sleep). 6061 * 6062 * RETURNS: 6063 * 0 if all ports are started successfully, -errno otherwise. 6064 */ 6065 int ata_host_start(struct ata_host *host) 6066 { 6067 int have_stop = 0; 6068 void *start_dr = NULL; 6069 int i, rc; 6070 6071 if (host->flags & ATA_HOST_STARTED) 6072 return 0; 6073 6074 ata_finalize_port_ops(host->ops); 6075 6076 for (i = 0; i < host->n_ports; i++) { 6077 struct ata_port *ap = host->ports[i]; 6078 6079 ata_finalize_port_ops(ap->ops); 6080 6081 if (!host->ops && !ata_port_is_dummy(ap)) 6082 host->ops = ap->ops; 6083 6084 if (ap->ops->port_stop) 6085 have_stop = 1; 6086 } 6087 6088 if (host->ops && host->ops->host_stop) 6089 have_stop = 1; 6090 6091 if (have_stop) { 6092 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL); 6093 if (!start_dr) 6094 return -ENOMEM; 6095 } 6096 6097 for (i = 0; i < host->n_ports; i++) { 6098 struct ata_port *ap = host->ports[i]; 6099 6100 if (ap->ops->port_start) { 6101 rc = ap->ops->port_start(ap); 6102 if (rc) { 6103 if (rc != -ENODEV) 6104 dev_err(host->dev, 6105 "failed to start port %d (errno=%d)\n", 6106 i, rc); 6107 goto err_out; 6108 } 6109 } 6110 ata_eh_freeze_port(ap); 6111 } 6112 6113 if (start_dr) 6114 devres_add(host->dev, start_dr); 6115 host->flags |= ATA_HOST_STARTED; 6116 return 0; 6117 6118 err_out: 6119 while (--i >= 0) { 6120 struct ata_port *ap = host->ports[i]; 6121 6122 if (ap->ops->port_stop) 6123 ap->ops->port_stop(ap); 6124 } 6125 devres_free(start_dr); 6126 return rc; 6127 } 6128 EXPORT_SYMBOL_GPL(ata_host_start); 6129 6130 /** 6131 * ata_host_init - Initialize a host struct for sas (ipr, libsas) 6132 * @host: host to initialize 6133 * @dev: device host is attached to 6134 * @ops: port_ops 6135 * 6136 */ 6137 void ata_host_init(struct ata_host *host, struct device *dev, 6138 struct ata_port_operations *ops) 6139 { 6140 spin_lock_init(&host->lock); 6141 mutex_init(&host->eh_mutex); 6142 host->n_tags = ATA_MAX_QUEUE; 6143 host->dev = dev; 6144 host->ops = ops; 6145 kref_init(&host->kref); 6146 } 6147 EXPORT_SYMBOL_GPL(ata_host_init); 6148 6149 void ata_port_probe(struct ata_port *ap) 6150 { 6151 struct ata_eh_info *ehi = &ap->link.eh_info; 6152 unsigned long flags; 6153 6154 ata_acpi_port_power_on(ap); 6155 6156 /* kick EH for boot probing */ 6157 spin_lock_irqsave(ap->lock, flags); 6158 6159 ehi->probe_mask |= ATA_ALL_DEVICES; 6160 ehi->action |= ATA_EH_RESET; 6161 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; 6162 6163 ap->pflags &= ~ATA_PFLAG_INITIALIZING; 6164 ap->pflags |= ATA_PFLAG_LOADING; 6165 ata_port_schedule_eh(ap); 6166 6167 spin_unlock_irqrestore(ap->lock, flags); 6168 } 6169 EXPORT_SYMBOL_GPL(ata_port_probe); 6170 6171 static void async_port_probe(void *data, async_cookie_t cookie) 6172 { 6173 struct ata_port *ap = data; 6174 6175 /* 6176 * If we're not allowed to scan this host in parallel, 6177 * we need to wait until all previous scans have completed 6178 * before going further. 6179 * Jeff Garzik says this is only within a controller, so we 6180 * don't need to wait for port 0, only for later ports. 6181 */ 6182 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0) 6183 async_synchronize_cookie(cookie); 6184 6185 ata_port_probe(ap); 6186 ata_port_wait_eh(ap); 6187 6188 /* in order to keep device order, we need to synchronize at this point */ 6189 async_synchronize_cookie(cookie); 6190 6191 ata_scsi_scan_host(ap, 1); 6192 } 6193 6194 /** 6195 * ata_host_register - register initialized ATA host 6196 * @host: ATA host to register 6197 * @sht: template for SCSI host 6198 * 6199 * Register initialized ATA host. @host is allocated using 6200 * ata_host_alloc() and fully initialized by LLD. This function 6201 * starts ports, registers @host with ATA and SCSI layers and 6202 * probe registered devices. 6203 * 6204 * LOCKING: 6205 * Inherited from calling layer (may sleep). 6206 * 6207 * RETURNS: 6208 * 0 on success, -errno otherwise. 6209 */ 6210 int ata_host_register(struct ata_host *host, const struct scsi_host_template *sht) 6211 { 6212 int i, rc; 6213 6214 host->n_tags = clamp(sht->can_queue, 1, ATA_MAX_QUEUE); 6215 6216 /* host must have been started */ 6217 if (!(host->flags & ATA_HOST_STARTED)) { 6218 dev_err(host->dev, "BUG: trying to register unstarted host\n"); 6219 WARN_ON(1); 6220 return -EINVAL; 6221 } 6222 6223 /* Create associated sysfs transport objects */ 6224 for (i = 0; i < host->n_ports; i++) { 6225 rc = ata_tport_add(host->dev,host->ports[i]); 6226 if (rc) { 6227 goto err_tadd; 6228 } 6229 } 6230 6231 rc = ata_scsi_add_hosts(host, sht); 6232 if (rc) 6233 goto err_tadd; 6234 6235 /* set cable, sata_spd_limit and report */ 6236 for (i = 0; i < host->n_ports; i++) { 6237 struct ata_port *ap = host->ports[i]; 6238 unsigned int xfer_mask; 6239 6240 /* set SATA cable type if still unset */ 6241 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) 6242 ap->cbl = ATA_CBL_SATA; 6243 6244 /* init sata_spd_limit to the current value */ 6245 sata_link_init_spd(&ap->link); 6246 if (ap->slave_link) 6247 sata_link_init_spd(ap->slave_link); 6248 6249 /* print per-port info to dmesg */ 6250 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, 6251 ap->udma_mask); 6252 6253 if (!ata_port_is_dummy(ap)) { 6254 ata_port_info(ap, "%cATA max %s %s\n", 6255 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', 6256 ata_mode_string(xfer_mask), 6257 ap->link.eh_info.desc); 6258 ata_ehi_clear_desc(&ap->link.eh_info); 6259 } else 6260 ata_port_info(ap, "DUMMY\n"); 6261 } 6262 6263 /* perform each probe asynchronously */ 6264 for (i = 0; i < host->n_ports; i++) { 6265 struct ata_port *ap = host->ports[i]; 6266 ap->cookie = async_schedule(async_port_probe, ap); 6267 } 6268 6269 return 0; 6270 6271 err_tadd: 6272 while (--i >= 0) { 6273 ata_tport_delete(host->ports[i]); 6274 } 6275 return rc; 6276 6277 } 6278 EXPORT_SYMBOL_GPL(ata_host_register); 6279 6280 /** 6281 * ata_host_activate - start host, request IRQ and register it 6282 * @host: target ATA host 6283 * @irq: IRQ to request 6284 * @irq_handler: irq_handler used when requesting IRQ 6285 * @irq_flags: irq_flags used when requesting IRQ 6286 * @sht: scsi_host_template to use when registering the host 6287 * 6288 * After allocating an ATA host and initializing it, most libata 6289 * LLDs perform three steps to activate the host - start host, 6290 * request IRQ and register it. This helper takes necessary 6291 * arguments and performs the three steps in one go. 6292 * 6293 * An invalid IRQ skips the IRQ registration and expects the host to 6294 * have set polling mode on the port. In this case, @irq_handler 6295 * should be NULL. 6296 * 6297 * LOCKING: 6298 * Inherited from calling layer (may sleep). 6299 * 6300 * RETURNS: 6301 * 0 on success, -errno otherwise. 6302 */ 6303 int ata_host_activate(struct ata_host *host, int irq, 6304 irq_handler_t irq_handler, unsigned long irq_flags, 6305 const struct scsi_host_template *sht) 6306 { 6307 int i, rc; 6308 char *irq_desc; 6309 6310 rc = ata_host_start(host); 6311 if (rc) 6312 return rc; 6313 6314 /* Special case for polling mode */ 6315 if (!irq) { 6316 WARN_ON(irq_handler); 6317 return ata_host_register(host, sht); 6318 } 6319 6320 irq_desc = devm_kasprintf(host->dev, GFP_KERNEL, "%s[%s]", 6321 dev_driver_string(host->dev), 6322 dev_name(host->dev)); 6323 if (!irq_desc) 6324 return -ENOMEM; 6325 6326 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, 6327 irq_desc, host); 6328 if (rc) 6329 return rc; 6330 6331 for (i = 0; i < host->n_ports; i++) 6332 ata_port_desc_misc(host->ports[i], irq); 6333 6334 rc = ata_host_register(host, sht); 6335 /* if failed, just free the IRQ and leave ports alone */ 6336 if (rc) 6337 devm_free_irq(host->dev, irq, host); 6338 6339 return rc; 6340 } 6341 EXPORT_SYMBOL_GPL(ata_host_activate); 6342 6343 /** 6344 * ata_dev_free_resources - Free a device resources 6345 * @dev: Target ATA device 6346 * 6347 * Free resources allocated to support a device features. 6348 * 6349 * LOCKING: 6350 * Kernel thread context (may sleep). 6351 */ 6352 void ata_dev_free_resources(struct ata_device *dev) 6353 { 6354 if (zpodd_dev_enabled(dev)) 6355 zpodd_exit(dev); 6356 6357 ata_dev_cleanup_cdl_resources(dev); 6358 } 6359 6360 /** 6361 * ata_port_detach - Detach ATA port in preparation of device removal 6362 * @ap: ATA port to be detached 6363 * 6364 * Detach all ATA devices and the associated SCSI devices of @ap; 6365 * then, remove the associated SCSI host. @ap is guaranteed to 6366 * be quiescent on return from this function. 6367 * 6368 * LOCKING: 6369 * Kernel thread context (may sleep). 6370 */ 6371 static void ata_port_detach(struct ata_port *ap) 6372 { 6373 unsigned long flags; 6374 struct ata_link *link; 6375 struct ata_device *dev; 6376 6377 /* Ensure ata_port probe has completed */ 6378 async_synchronize_cookie(ap->cookie + 1); 6379 6380 /* Wait for any ongoing EH */ 6381 ata_port_wait_eh(ap); 6382 6383 mutex_lock(&ap->scsi_scan_mutex); 6384 spin_lock_irqsave(ap->lock, flags); 6385 6386 /* Remove scsi devices */ 6387 ata_for_each_link(link, ap, HOST_FIRST) { 6388 ata_for_each_dev(dev, link, ALL) { 6389 if (dev->sdev) { 6390 spin_unlock_irqrestore(ap->lock, flags); 6391 scsi_remove_device(dev->sdev); 6392 spin_lock_irqsave(ap->lock, flags); 6393 dev->sdev = NULL; 6394 } 6395 } 6396 } 6397 6398 /* Tell EH to disable all devices */ 6399 ap->pflags |= ATA_PFLAG_UNLOADING; 6400 ata_port_schedule_eh(ap); 6401 6402 spin_unlock_irqrestore(ap->lock, flags); 6403 mutex_unlock(&ap->scsi_scan_mutex); 6404 6405 /* wait till EH commits suicide */ 6406 ata_port_wait_eh(ap); 6407 6408 /* It better be dead now and not have any remaining deferred qc. */ 6409 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED)); 6410 6411 cancel_delayed_work_sync(&ap->hotplug_task); 6412 cancel_delayed_work_sync(&ap->scsi_rescan_task); 6413 6414 ata_for_each_link(link, ap, PMP_FIRST) { 6415 WARN_ON(link->deferred_qc); 6416 cancel_work_sync(&link->deferred_qc_work); 6417 } 6418 6419 /* Delete port multiplier link transport devices */ 6420 if (ap->pmp_link) { 6421 int i; 6422 6423 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 6424 ata_tlink_delete(&ap->pmp_link[i]); 6425 } 6426 6427 /* Remove the associated SCSI host */ 6428 scsi_remove_host(ap->scsi_host); 6429 ata_tport_delete(ap); 6430 } 6431 6432 /** 6433 * ata_host_detach - Detach all ports of an ATA host 6434 * @host: Host to detach 6435 * 6436 * Detach all ports of @host. 6437 * 6438 * LOCKING: 6439 * Kernel thread context (may sleep). 6440 */ 6441 void ata_host_detach(struct ata_host *host) 6442 { 6443 int i; 6444 6445 for (i = 0; i < host->n_ports; i++) 6446 ata_port_detach(host->ports[i]); 6447 6448 /* the host is dead now, dissociate ACPI */ 6449 ata_acpi_dissociate(host); 6450 } 6451 EXPORT_SYMBOL_GPL(ata_host_detach); 6452 6453 #ifdef CONFIG_PCI 6454 6455 /** 6456 * ata_pci_remove_one - PCI layer callback for device removal 6457 * @pdev: PCI device that was removed 6458 * 6459 * PCI layer indicates to libata via this hook that hot-unplug or 6460 * module unload event has occurred. Detach all ports. Resource 6461 * release is handled via devres. 6462 * 6463 * LOCKING: 6464 * Inherited from PCI layer (may sleep). 6465 */ 6466 void ata_pci_remove_one(struct pci_dev *pdev) 6467 { 6468 struct ata_host *host = pci_get_drvdata(pdev); 6469 6470 ata_host_detach(host); 6471 } 6472 EXPORT_SYMBOL_GPL(ata_pci_remove_one); 6473 6474 void ata_pci_shutdown_one(struct pci_dev *pdev) 6475 { 6476 struct ata_host *host = pci_get_drvdata(pdev); 6477 int i; 6478 6479 for (i = 0; i < host->n_ports; i++) { 6480 struct ata_port *ap = host->ports[i]; 6481 6482 ap->pflags |= ATA_PFLAG_FROZEN; 6483 6484 /* Disable port interrupts */ 6485 if (ap->ops->freeze) 6486 ap->ops->freeze(ap); 6487 6488 /* Stop the port DMA engines */ 6489 if (ap->ops->port_stop) 6490 ap->ops->port_stop(ap); 6491 } 6492 } 6493 EXPORT_SYMBOL_GPL(ata_pci_shutdown_one); 6494 6495 /* move to PCI subsystem */ 6496 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) 6497 { 6498 unsigned long tmp = 0; 6499 6500 switch (bits->width) { 6501 case 1: { 6502 u8 tmp8 = 0; 6503 pci_read_config_byte(pdev, bits->reg, &tmp8); 6504 tmp = tmp8; 6505 break; 6506 } 6507 case 2: { 6508 u16 tmp16 = 0; 6509 pci_read_config_word(pdev, bits->reg, &tmp16); 6510 tmp = tmp16; 6511 break; 6512 } 6513 case 4: { 6514 u32 tmp32 = 0; 6515 pci_read_config_dword(pdev, bits->reg, &tmp32); 6516 tmp = tmp32; 6517 break; 6518 } 6519 6520 default: 6521 return -EINVAL; 6522 } 6523 6524 tmp &= bits->mask; 6525 6526 return (tmp == bits->val) ? 1 : 0; 6527 } 6528 EXPORT_SYMBOL_GPL(pci_test_config_bits); 6529 6530 #ifdef CONFIG_PM 6531 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) 6532 { 6533 pci_save_state(pdev); 6534 pci_disable_device(pdev); 6535 6536 if (mesg.event & PM_EVENT_SLEEP) 6537 pci_set_power_state(pdev, PCI_D3hot); 6538 } 6539 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); 6540 6541 int ata_pci_device_do_resume(struct pci_dev *pdev) 6542 { 6543 int rc; 6544 6545 pci_set_power_state(pdev, PCI_D0); 6546 pci_restore_state(pdev); 6547 6548 rc = pcim_enable_device(pdev); 6549 if (rc) { 6550 dev_err(&pdev->dev, 6551 "failed to enable device after resume (%d)\n", rc); 6552 return rc; 6553 } 6554 6555 pci_set_master(pdev); 6556 return 0; 6557 } 6558 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); 6559 6560 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) 6561 { 6562 struct ata_host *host = pci_get_drvdata(pdev); 6563 6564 ata_host_suspend(host, mesg); 6565 6566 ata_pci_device_do_suspend(pdev, mesg); 6567 6568 return 0; 6569 } 6570 EXPORT_SYMBOL_GPL(ata_pci_device_suspend); 6571 6572 int ata_pci_device_resume(struct pci_dev *pdev) 6573 { 6574 struct ata_host *host = pci_get_drvdata(pdev); 6575 int rc; 6576 6577 rc = ata_pci_device_do_resume(pdev); 6578 if (rc == 0) 6579 ata_host_resume(host); 6580 return rc; 6581 } 6582 EXPORT_SYMBOL_GPL(ata_pci_device_resume); 6583 #endif /* CONFIG_PM */ 6584 #endif /* CONFIG_PCI */ 6585 6586 /** 6587 * ata_platform_remove_one - Platform layer callback for device removal 6588 * @pdev: Platform device that was removed 6589 * 6590 * Platform layer indicates to libata via this hook that hot-unplug or 6591 * module unload event has occurred. Detach all ports. Resource 6592 * release is handled via devres. 6593 * 6594 * LOCKING: 6595 * Inherited from platform layer (may sleep). 6596 */ 6597 void ata_platform_remove_one(struct platform_device *pdev) 6598 { 6599 struct ata_host *host = platform_get_drvdata(pdev); 6600 6601 ata_host_detach(host); 6602 } 6603 EXPORT_SYMBOL_GPL(ata_platform_remove_one); 6604 6605 #ifdef CONFIG_ATA_FORCE 6606 6607 #define force_cbl(name, flag) \ 6608 { #name, .cbl = (flag) } 6609 6610 #define force_spd_limit(spd, val) \ 6611 { #spd, .spd_limit = (val) } 6612 6613 #define force_xfer(mode, shift) \ 6614 { #mode, .xfer_mask = (1UL << (shift)) } 6615 6616 #define force_lflag_on(name, flags) \ 6617 { #name, .lflags_on = (flags) } 6618 6619 #define force_lflag_onoff(name, flags) \ 6620 { "no" #name, .lflags_on = (flags) }, \ 6621 { #name, .lflags_off = (flags) } 6622 6623 #define force_pflag_on(name, flags) \ 6624 { #name, .pflags_on = (flags) } 6625 6626 #define force_quirk_on(name, flag) \ 6627 { #name, .quirk_on = (flag) } 6628 6629 #define force_quirk_val(name, flag, val) \ 6630 { #name, .quirk_on = (flag), \ 6631 .value = (val) } 6632 6633 #define force_quirk_onoff(name, flag) \ 6634 { "no" #name, .quirk_on = (flag) }, \ 6635 { #name, .quirk_off = (flag) } 6636 6637 /* 6638 * If the ata_force_param struct member 'name' ends with '=', then the value 6639 * after the equal sign will be parsed as an u64, and will be saved in the 6640 * ata_force_param struct member 'value'. This works because each libata.force 6641 * entry (struct ata_force_ent) is separated by commas, so each entry represents 6642 * a single quirk, and can thus only have a single value. 6643 */ 6644 static const struct ata_force_param force_tbl[] __initconst = { 6645 force_cbl(40c, ATA_CBL_PATA40), 6646 force_cbl(80c, ATA_CBL_PATA80), 6647 force_cbl(short40c, ATA_CBL_PATA40_SHORT), 6648 force_cbl(unk, ATA_CBL_PATA_UNK), 6649 force_cbl(ign, ATA_CBL_PATA_IGN), 6650 force_cbl(sata, ATA_CBL_SATA), 6651 6652 force_spd_limit(1.5Gbps, 1), 6653 force_spd_limit(3.0Gbps, 2), 6654 6655 force_xfer(pio0, ATA_SHIFT_PIO + 0), 6656 force_xfer(pio1, ATA_SHIFT_PIO + 1), 6657 force_xfer(pio2, ATA_SHIFT_PIO + 2), 6658 force_xfer(pio3, ATA_SHIFT_PIO + 3), 6659 force_xfer(pio4, ATA_SHIFT_PIO + 4), 6660 force_xfer(pio5, ATA_SHIFT_PIO + 5), 6661 force_xfer(pio6, ATA_SHIFT_PIO + 6), 6662 force_xfer(mwdma0, ATA_SHIFT_MWDMA + 0), 6663 force_xfer(mwdma1, ATA_SHIFT_MWDMA + 1), 6664 force_xfer(mwdma2, ATA_SHIFT_MWDMA + 2), 6665 force_xfer(mwdma3, ATA_SHIFT_MWDMA + 3), 6666 force_xfer(mwdma4, ATA_SHIFT_MWDMA + 4), 6667 force_xfer(udma0, ATA_SHIFT_UDMA + 0), 6668 force_xfer(udma16, ATA_SHIFT_UDMA + 0), 6669 force_xfer(udma/16, ATA_SHIFT_UDMA + 0), 6670 force_xfer(udma1, ATA_SHIFT_UDMA + 1), 6671 force_xfer(udma25, ATA_SHIFT_UDMA + 1), 6672 force_xfer(udma/25, ATA_SHIFT_UDMA + 1), 6673 force_xfer(udma2, ATA_SHIFT_UDMA + 2), 6674 force_xfer(udma33, ATA_SHIFT_UDMA + 2), 6675 force_xfer(udma/33, ATA_SHIFT_UDMA + 2), 6676 force_xfer(udma3, ATA_SHIFT_UDMA + 3), 6677 force_xfer(udma44, ATA_SHIFT_UDMA + 3), 6678 force_xfer(udma/44, ATA_SHIFT_UDMA + 3), 6679 force_xfer(udma4, ATA_SHIFT_UDMA + 4), 6680 force_xfer(udma66, ATA_SHIFT_UDMA + 4), 6681 force_xfer(udma/66, ATA_SHIFT_UDMA + 4), 6682 force_xfer(udma5, ATA_SHIFT_UDMA + 5), 6683 force_xfer(udma100, ATA_SHIFT_UDMA + 5), 6684 force_xfer(udma/100, ATA_SHIFT_UDMA + 5), 6685 force_xfer(udma6, ATA_SHIFT_UDMA + 6), 6686 force_xfer(udma133, ATA_SHIFT_UDMA + 6), 6687 force_xfer(udma/133, ATA_SHIFT_UDMA + 6), 6688 force_xfer(udma7, ATA_SHIFT_UDMA + 7), 6689 6690 force_lflag_on(nohrst, ATA_LFLAG_NO_HRST), 6691 force_lflag_on(nosrst, ATA_LFLAG_NO_SRST), 6692 force_lflag_on(norst, ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST), 6693 force_lflag_on(rstonce, ATA_LFLAG_RST_ONCE), 6694 force_lflag_onoff(dbdelay, ATA_LFLAG_NO_DEBOUNCE_DELAY), 6695 6696 force_pflag_on(external, ATA_PFLAG_EXTERNAL), 6697 6698 force_quirk_onoff(ncq, ATA_QUIRK_NONCQ), 6699 force_quirk_onoff(ncqtrim, ATA_QUIRK_NO_NCQ_TRIM), 6700 force_quirk_onoff(ncqati, ATA_QUIRK_NO_NCQ_ON_ATI), 6701 6702 force_quirk_onoff(trim, ATA_QUIRK_NOTRIM), 6703 force_quirk_on(trim_zero, ATA_QUIRK_ZERO_AFTER_TRIM), 6704 force_quirk_on(max_trim_128m, ATA_QUIRK_MAX_TRIM_128M), 6705 6706 force_quirk_onoff(dma, ATA_QUIRK_NODMA), 6707 force_quirk_on(atapi_dmadir, ATA_QUIRK_ATAPI_DMADIR), 6708 force_quirk_on(atapi_mod16_dma, ATA_QUIRK_ATAPI_MOD16_DMA), 6709 6710 force_quirk_onoff(dmalog, ATA_QUIRK_NO_DMA_LOG), 6711 force_quirk_onoff(iddevlog, ATA_QUIRK_NO_ID_DEV_LOG), 6712 force_quirk_onoff(logdir, ATA_QUIRK_NO_LOG_DIR), 6713 6714 force_quirk_val(max_sec_128, ATA_QUIRK_MAX_SEC, 128), 6715 force_quirk_val(max_sec_1024, ATA_QUIRK_MAX_SEC, 1024), 6716 force_quirk_on(max_sec=, ATA_QUIRK_MAX_SEC), 6717 force_quirk_on(max_sec_lba48, ATA_QUIRK_MAX_SEC_LBA48), 6718 6719 force_quirk_onoff(lpm, ATA_QUIRK_NOLPM), 6720 force_quirk_onoff(setxfer, ATA_QUIRK_NOSETXFER), 6721 force_quirk_on(dump_id, ATA_QUIRK_DUMP_ID), 6722 force_quirk_onoff(fua, ATA_QUIRK_NO_FUA), 6723 6724 force_quirk_on(disable, ATA_QUIRK_DISABLE), 6725 }; 6726 6727 static int __init ata_parse_force_one(char **cur, 6728 struct ata_force_ent *force_ent, 6729 const char **reason) 6730 { 6731 char *start = *cur, *p = *cur; 6732 char *id, *val, *endp, *equalsign, *char_after_equalsign; 6733 const struct ata_force_param *match_fp = NULL; 6734 u64 val_after_equalsign; 6735 int nr_matches = 0, i; 6736 6737 /* find where this param ends and update *cur */ 6738 while (*p != '\0' && *p != ',') 6739 p++; 6740 6741 if (*p == '\0') 6742 *cur = p; 6743 else 6744 *cur = p + 1; 6745 6746 *p = '\0'; 6747 6748 /* parse */ 6749 p = strchr(start, ':'); 6750 if (!p) { 6751 val = strstrip(start); 6752 goto parse_val; 6753 } 6754 *p = '\0'; 6755 6756 id = strstrip(start); 6757 val = strstrip(p + 1); 6758 6759 /* parse id */ 6760 p = strchr(id, '.'); 6761 if (p) { 6762 *p++ = '\0'; 6763 force_ent->device = simple_strtoul(p, &endp, 10); 6764 if (p == endp || *endp != '\0') { 6765 *reason = "invalid device"; 6766 return -EINVAL; 6767 } 6768 } 6769 6770 force_ent->port = simple_strtoul(id, &endp, 10); 6771 if (id == endp || *endp != '\0') { 6772 *reason = "invalid port/link"; 6773 return -EINVAL; 6774 } 6775 6776 parse_val: 6777 equalsign = strchr(val, '='); 6778 if (equalsign) { 6779 char_after_equalsign = equalsign + 1; 6780 if (!strlen(char_after_equalsign) || 6781 kstrtoull(char_after_equalsign, 10, &val_after_equalsign)) { 6782 *reason = "invalid value after equal sign"; 6783 return -EINVAL; 6784 } 6785 } 6786 6787 /* Parse the parameter value. */ 6788 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) { 6789 const struct ata_force_param *fp = &force_tbl[i]; 6790 6791 /* 6792 * If val contains equal sign, match has to be exact, i.e. 6793 * shortcuts are not supported. 6794 */ 6795 if (equalsign && 6796 (strncasecmp(val, fp->name, 6797 char_after_equalsign - val) == 0)) { 6798 force_ent->param = *fp; 6799 force_ent->param.value = val_after_equalsign; 6800 return 0; 6801 } 6802 6803 /* 6804 * If val does not contain equal sign, allow shortcuts so that 6805 * both 1.5 and 1.5Gbps work. 6806 */ 6807 if (strncasecmp(val, fp->name, strlen(val))) 6808 continue; 6809 6810 nr_matches++; 6811 match_fp = fp; 6812 6813 if (strcasecmp(val, fp->name) == 0) { 6814 nr_matches = 1; 6815 break; 6816 } 6817 } 6818 6819 if (!nr_matches) { 6820 *reason = "unknown value"; 6821 return -EINVAL; 6822 } 6823 if (nr_matches > 1) { 6824 *reason = "ambiguous value"; 6825 return -EINVAL; 6826 } 6827 6828 force_ent->param = *match_fp; 6829 6830 return 0; 6831 } 6832 6833 static void __init ata_parse_force_param(void) 6834 { 6835 int idx = 0, size = 1; 6836 int last_port = -1, last_device = -1; 6837 char *p, *cur, *next; 6838 6839 /* Calculate maximum number of params and allocate ata_force_tbl */ 6840 for (p = ata_force_param_buf; *p; p++) 6841 if (*p == ',') 6842 size++; 6843 6844 ata_force_tbl = kzalloc_objs(ata_force_tbl[0], size); 6845 if (!ata_force_tbl) { 6846 printk(KERN_WARNING "ata: failed to extend force table, " 6847 "libata.force ignored\n"); 6848 return; 6849 } 6850 6851 /* parse and populate the table */ 6852 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) { 6853 const char *reason = ""; 6854 struct ata_force_ent te = { .port = -1, .device = -1 }; 6855 6856 next = cur; 6857 if (ata_parse_force_one(&next, &te, &reason)) { 6858 printk(KERN_WARNING "ata: failed to parse force " 6859 "parameter \"%s\" (%s)\n", 6860 cur, reason); 6861 continue; 6862 } 6863 6864 if (te.port == -1) { 6865 te.port = last_port; 6866 te.device = last_device; 6867 } 6868 6869 ata_force_tbl[idx++] = te; 6870 6871 last_port = te.port; 6872 last_device = te.device; 6873 } 6874 6875 ata_force_tbl_size = idx; 6876 } 6877 6878 static void ata_free_force_param(void) 6879 { 6880 kfree(ata_force_tbl); 6881 } 6882 #else 6883 static inline void ata_parse_force_param(void) { } 6884 static inline void ata_free_force_param(void) { } 6885 #endif 6886 6887 static int __init ata_init(void) 6888 { 6889 int rc; 6890 6891 ata_parse_force_param(); 6892 6893 rc = ata_sff_init(); 6894 if (rc) { 6895 ata_free_force_param(); 6896 return rc; 6897 } 6898 6899 libata_transport_init(); 6900 6901 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); 6902 6903 return 0; 6904 } 6905 6906 static void __exit ata_exit(void) 6907 { 6908 libata_transport_exit(); 6909 ata_sff_exit(); 6910 ata_free_force_param(); 6911 } 6912 6913 subsys_initcall(ata_init); 6914 module_exit(ata_exit); 6915 6916 static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1); 6917 6918 int ata_ratelimit(void) 6919 { 6920 return __ratelimit(&ratelimit); 6921 } 6922 EXPORT_SYMBOL_GPL(ata_ratelimit); 6923 6924 /** 6925 * ata_msleep - ATA EH owner aware msleep 6926 * @ap: ATA port to attribute the sleep to 6927 * @msecs: duration to sleep in milliseconds 6928 * 6929 * Sleeps @msecs. If the current task is owner of @ap's EH, the 6930 * ownership is released before going to sleep and reacquired 6931 * after the sleep is complete. IOW, other ports sharing the 6932 * @ap->host will be allowed to own the EH while this task is 6933 * sleeping. 6934 * 6935 * LOCKING: 6936 * Might sleep. 6937 */ 6938 void ata_msleep(struct ata_port *ap, unsigned int msecs) 6939 __context_unsafe(conditional locking) 6940 { 6941 bool owns_eh = ap && ap->host->eh_owner == current; 6942 6943 if (owns_eh) 6944 ata_eh_release(ap); 6945 6946 if (msecs < 20) { 6947 unsigned long usecs = msecs * USEC_PER_MSEC; 6948 usleep_range(usecs, usecs + 50); 6949 } else { 6950 msleep(msecs); 6951 } 6952 6953 if (owns_eh) 6954 ata_eh_acquire(ap); 6955 } 6956 EXPORT_SYMBOL_GPL(ata_msleep); 6957 6958 /** 6959 * ata_wait_register - wait until register value changes 6960 * @ap: ATA port to wait register for, can be NULL 6961 * @reg: IO-mapped register 6962 * @mask: Mask to apply to read register value 6963 * @val: Wait condition 6964 * @interval: polling interval in milliseconds 6965 * @timeout: timeout in milliseconds 6966 * 6967 * Waiting for some bits of register to change is a common 6968 * operation for ATA controllers. This function reads 32bit LE 6969 * IO-mapped register @reg and tests for the following condition. 6970 * 6971 * (*@reg & mask) != val 6972 * 6973 * If the condition is met, it returns; otherwise, the process is 6974 * repeated after @interval_msec until timeout. 6975 * 6976 * LOCKING: 6977 * Kernel thread context (may sleep) 6978 * 6979 * RETURNS: 6980 * The final register value. 6981 */ 6982 u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val, 6983 unsigned int interval, unsigned int timeout) 6984 { 6985 unsigned long deadline; 6986 u32 tmp; 6987 6988 tmp = ioread32(reg); 6989 6990 /* Calculate timeout _after_ the first read to make sure 6991 * preceding writes reach the controller before starting to 6992 * eat away the timeout. 6993 */ 6994 deadline = ata_deadline(jiffies, timeout); 6995 6996 while ((tmp & mask) == val && time_before(jiffies, deadline)) { 6997 ata_msleep(ap, interval); 6998 tmp = ioread32(reg); 6999 } 7000 7001 return tmp; 7002 } 7003 EXPORT_SYMBOL_GPL(ata_wait_register); 7004 7005 /* 7006 * Dummy port_ops 7007 */ 7008 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) 7009 { 7010 return AC_ERR_SYSTEM; 7011 } 7012 7013 static void ata_dummy_error_handler(struct ata_port *ap) 7014 __must_hold(&ap->host->eh_mutex) 7015 { 7016 /* truly dummy */ 7017 } 7018 7019 struct ata_port_operations ata_dummy_port_ops = { 7020 .qc_issue = ata_dummy_qc_issue, 7021 .error_handler = ata_dummy_error_handler, 7022 .sched_eh = ata_std_sched_eh, 7023 .end_eh = ata_std_end_eh, 7024 }; 7025 EXPORT_SYMBOL_GPL(ata_dummy_port_ops); 7026 7027 const struct ata_port_info ata_dummy_port_info = { 7028 .port_ops = &ata_dummy_port_ops, 7029 }; 7030 EXPORT_SYMBOL_GPL(ata_dummy_port_info); 7031 7032 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_tf_load); 7033 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_exec_command); 7034 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_setup); 7035 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_start); 7036 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_status); 7037