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 unsigned int ata_dev_quirks(const struct ata_device *dev); 80 81 static DEFINE_IDA(ata_ida); 82 83 #ifdef CONFIG_ATA_FORCE 84 struct ata_force_param { 85 const char *name; 86 u8 cbl; 87 u8 spd_limit; 88 unsigned int xfer_mask; 89 unsigned int quirk_on; 90 unsigned int quirk_off; 91 unsigned int pflags_on; 92 u16 lflags_on; 93 u16 lflags_off; 94 }; 95 96 struct ata_force_ent { 97 int port; 98 int device; 99 struct ata_force_param param; 100 }; 101 102 static struct ata_force_ent *ata_force_tbl; 103 static int ata_force_tbl_size; 104 105 static char ata_force_param_buf[COMMAND_LINE_SIZE] __initdata; 106 /* param_buf is thrown away after initialization, disallow read */ 107 module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0); 108 MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/admin-guide/kernel-parameters.rst for details)"); 109 #endif 110 111 static int atapi_enabled = 1; 112 module_param(atapi_enabled, int, 0444); 113 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])"); 114 115 static int atapi_dmadir = 0; 116 module_param(atapi_dmadir, int, 0444); 117 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)"); 118 119 int atapi_passthru16 = 1; 120 module_param(atapi_passthru16, int, 0444); 121 MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])"); 122 123 int libata_fua = 0; 124 module_param_named(fua, libata_fua, int, 0444); 125 MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)"); 126 127 static int ata_ignore_hpa; 128 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); 129 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); 130 131 static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; 132 module_param_named(dma, libata_dma_mask, int, 0444); 133 MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); 134 135 static int ata_probe_timeout; 136 module_param(ata_probe_timeout, int, 0444); 137 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); 138 139 int libata_noacpi = 0; 140 module_param_named(noacpi, libata_noacpi, int, 0444); 141 MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)"); 142 143 int libata_allow_tpm = 0; 144 module_param_named(allow_tpm, libata_allow_tpm, int, 0444); 145 MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)"); 146 147 static int atapi_an; 148 module_param(atapi_an, int, 0444); 149 MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)"); 150 151 MODULE_AUTHOR("Jeff Garzik"); 152 MODULE_DESCRIPTION("Library module for ATA devices"); 153 MODULE_LICENSE("GPL"); 154 MODULE_VERSION(DRV_VERSION); 155 156 static inline bool ata_dev_print_info(const struct ata_device *dev) 157 { 158 struct ata_eh_context *ehc = &dev->link->eh_context; 159 160 return ehc->i.flags & ATA_EHI_PRINTINFO; 161 } 162 163 /** 164 * ata_link_next - link iteration helper 165 * @link: the previous link, NULL to start 166 * @ap: ATA port containing links to iterate 167 * @mode: iteration mode, one of ATA_LITER_* 168 * 169 * LOCKING: 170 * Host lock or EH context. 171 * 172 * RETURNS: 173 * Pointer to the next link. 174 */ 175 struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap, 176 enum ata_link_iter_mode mode) 177 { 178 BUG_ON(mode != ATA_LITER_EDGE && 179 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST); 180 181 /* NULL link indicates start of iteration */ 182 if (!link) 183 switch (mode) { 184 case ATA_LITER_EDGE: 185 case ATA_LITER_PMP_FIRST: 186 if (sata_pmp_attached(ap)) 187 return ap->pmp_link; 188 fallthrough; 189 case ATA_LITER_HOST_FIRST: 190 return &ap->link; 191 } 192 193 /* we just iterated over the host link, what's next? */ 194 if (link == &ap->link) 195 switch (mode) { 196 case ATA_LITER_HOST_FIRST: 197 if (sata_pmp_attached(ap)) 198 return ap->pmp_link; 199 fallthrough; 200 case ATA_LITER_PMP_FIRST: 201 if (unlikely(ap->slave_link)) 202 return ap->slave_link; 203 fallthrough; 204 case ATA_LITER_EDGE: 205 return NULL; 206 } 207 208 /* slave_link excludes PMP */ 209 if (unlikely(link == ap->slave_link)) 210 return NULL; 211 212 /* we were over a PMP link */ 213 if (++link < ap->pmp_link + ap->nr_pmp_links) 214 return link; 215 216 if (mode == ATA_LITER_PMP_FIRST) 217 return &ap->link; 218 219 return NULL; 220 } 221 EXPORT_SYMBOL_GPL(ata_link_next); 222 223 /** 224 * ata_dev_next - device iteration helper 225 * @dev: the previous device, NULL to start 226 * @link: ATA link containing devices to iterate 227 * @mode: iteration mode, one of ATA_DITER_* 228 * 229 * LOCKING: 230 * Host lock or EH context. 231 * 232 * RETURNS: 233 * Pointer to the next device. 234 */ 235 struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link, 236 enum ata_dev_iter_mode mode) 237 { 238 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE && 239 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE); 240 241 /* NULL dev indicates start of iteration */ 242 if (!dev) 243 switch (mode) { 244 case ATA_DITER_ENABLED: 245 case ATA_DITER_ALL: 246 dev = link->device; 247 goto check; 248 case ATA_DITER_ENABLED_REVERSE: 249 case ATA_DITER_ALL_REVERSE: 250 dev = link->device + ata_link_max_devices(link) - 1; 251 goto check; 252 } 253 254 next: 255 /* move to the next one */ 256 switch (mode) { 257 case ATA_DITER_ENABLED: 258 case ATA_DITER_ALL: 259 if (++dev < link->device + ata_link_max_devices(link)) 260 goto check; 261 return NULL; 262 case ATA_DITER_ENABLED_REVERSE: 263 case ATA_DITER_ALL_REVERSE: 264 if (--dev >= link->device) 265 goto check; 266 return NULL; 267 } 268 269 check: 270 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) && 271 !ata_dev_enabled(dev)) 272 goto next; 273 return dev; 274 } 275 EXPORT_SYMBOL_GPL(ata_dev_next); 276 277 /** 278 * ata_dev_phys_link - find physical link for a device 279 * @dev: ATA device to look up physical link for 280 * 281 * Look up physical link which @dev is attached to. Note that 282 * this is different from @dev->link only when @dev is on slave 283 * link. For all other cases, it's the same as @dev->link. 284 * 285 * LOCKING: 286 * Don't care. 287 * 288 * RETURNS: 289 * Pointer to the found physical link. 290 */ 291 struct ata_link *ata_dev_phys_link(struct ata_device *dev) 292 { 293 struct ata_port *ap = dev->link->ap; 294 295 if (!ap->slave_link) 296 return dev->link; 297 if (!dev->devno) 298 return &ap->link; 299 return ap->slave_link; 300 } 301 302 #ifdef CONFIG_ATA_FORCE 303 /** 304 * ata_force_cbl - force cable type according to libata.force 305 * @ap: ATA port of interest 306 * 307 * Force cable type according to libata.force and whine about it. 308 * The last entry which has matching port number is used, so it 309 * can be specified as part of device force parameters. For 310 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the 311 * same effect. 312 * 313 * LOCKING: 314 * EH context. 315 */ 316 void ata_force_cbl(struct ata_port *ap) 317 { 318 int i; 319 320 for (i = ata_force_tbl_size - 1; i >= 0; i--) { 321 const struct ata_force_ent *fe = &ata_force_tbl[i]; 322 323 if (fe->port != -1 && fe->port != ap->print_id) 324 continue; 325 326 if (fe->param.cbl == ATA_CBL_NONE) 327 continue; 328 329 ap->cbl = fe->param.cbl; 330 ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name); 331 return; 332 } 333 } 334 335 /** 336 * ata_force_pflags - force port flags according to libata.force 337 * @ap: ATA port of interest 338 * 339 * Force port flags according to libata.force and whine about it. 340 * 341 * LOCKING: 342 * EH context. 343 */ 344 static void ata_force_pflags(struct ata_port *ap) 345 { 346 int i; 347 348 for (i = ata_force_tbl_size - 1; i >= 0; i--) { 349 const struct ata_force_ent *fe = &ata_force_tbl[i]; 350 351 if (fe->port != -1 && fe->port != ap->print_id) 352 continue; 353 354 /* let pflags stack */ 355 if (fe->param.pflags_on) { 356 ap->pflags |= fe->param.pflags_on; 357 ata_port_notice(ap, 358 "FORCE: port flag 0x%x forced -> 0x%x\n", 359 fe->param.pflags_on, ap->pflags); 360 } 361 } 362 } 363 364 /** 365 * ata_force_link_limits - force link limits according to libata.force 366 * @link: ATA link of interest 367 * 368 * Force link flags and SATA spd limit according to libata.force 369 * and whine about it. When only the port part is specified 370 * (e.g. 1:), the limit applies to all links connected to both 371 * the host link and all fan-out ports connected via PMP. If the 372 * device part is specified as 0 (e.g. 1.00:), it specifies the 373 * first fan-out link not the host link. Device number 15 always 374 * points to the host link whether PMP is attached or not. If the 375 * controller has slave link, device number 16 points to it. 376 * 377 * LOCKING: 378 * EH context. 379 */ 380 static void ata_force_link_limits(struct ata_link *link) 381 { 382 bool did_spd = false; 383 int linkno = link->pmp; 384 int i; 385 386 if (ata_is_host_link(link)) 387 linkno += 15; 388 389 for (i = ata_force_tbl_size - 1; i >= 0; i--) { 390 const struct ata_force_ent *fe = &ata_force_tbl[i]; 391 392 if (fe->port != -1 && fe->port != link->ap->print_id) 393 continue; 394 395 if (fe->device != -1 && fe->device != linkno) 396 continue; 397 398 /* only honor the first spd limit */ 399 if (!did_spd && fe->param.spd_limit) { 400 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1; 401 ata_link_notice(link, "FORCE: PHY spd limit set to %s\n", 402 fe->param.name); 403 did_spd = true; 404 } 405 406 /* let lflags stack */ 407 if (fe->param.lflags_on) { 408 link->flags |= fe->param.lflags_on; 409 ata_link_notice(link, 410 "FORCE: link flag 0x%x forced -> 0x%x\n", 411 fe->param.lflags_on, link->flags); 412 } 413 if (fe->param.lflags_off) { 414 link->flags &= ~fe->param.lflags_off; 415 ata_link_notice(link, 416 "FORCE: link flag 0x%x cleared -> 0x%x\n", 417 fe->param.lflags_off, link->flags); 418 } 419 } 420 } 421 422 /** 423 * ata_force_xfermask - force xfermask according to libata.force 424 * @dev: ATA device of interest 425 * 426 * Force xfer_mask according to libata.force and whine about it. 427 * For consistency with link selection, device number 15 selects 428 * the first device connected to the host link. 429 * 430 * LOCKING: 431 * EH context. 432 */ 433 static void ata_force_xfermask(struct ata_device *dev) 434 { 435 int devno = dev->link->pmp + dev->devno; 436 int alt_devno = devno; 437 int i; 438 439 /* allow n.15/16 for devices attached to host port */ 440 if (ata_is_host_link(dev->link)) 441 alt_devno += 15; 442 443 for (i = ata_force_tbl_size - 1; i >= 0; i--) { 444 const struct ata_force_ent *fe = &ata_force_tbl[i]; 445 unsigned int pio_mask, mwdma_mask, udma_mask; 446 447 if (fe->port != -1 && fe->port != dev->link->ap->print_id) 448 continue; 449 450 if (fe->device != -1 && fe->device != devno && 451 fe->device != alt_devno) 452 continue; 453 454 if (!fe->param.xfer_mask) 455 continue; 456 457 ata_unpack_xfermask(fe->param.xfer_mask, 458 &pio_mask, &mwdma_mask, &udma_mask); 459 if (udma_mask) 460 dev->udma_mask = udma_mask; 461 else if (mwdma_mask) { 462 dev->udma_mask = 0; 463 dev->mwdma_mask = mwdma_mask; 464 } else { 465 dev->udma_mask = 0; 466 dev->mwdma_mask = 0; 467 dev->pio_mask = pio_mask; 468 } 469 470 ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n", 471 fe->param.name); 472 return; 473 } 474 } 475 476 /** 477 * ata_force_quirks - force quirks according to libata.force 478 * @dev: ATA device of interest 479 * 480 * Force quirks according to libata.force and whine about it. 481 * For consistency with link selection, device number 15 selects 482 * the first device connected to the host link. 483 * 484 * LOCKING: 485 * EH context. 486 */ 487 static void ata_force_quirks(struct ata_device *dev) 488 { 489 int devno = dev->link->pmp + dev->devno; 490 int alt_devno = devno; 491 int i; 492 493 /* allow n.15/16 for devices attached to host port */ 494 if (ata_is_host_link(dev->link)) 495 alt_devno += 15; 496 497 for (i = 0; i < ata_force_tbl_size; i++) { 498 const struct ata_force_ent *fe = &ata_force_tbl[i]; 499 500 if (fe->port != -1 && fe->port != dev->link->ap->print_id) 501 continue; 502 503 if (fe->device != -1 && fe->device != devno && 504 fe->device != alt_devno) 505 continue; 506 507 if (!(~dev->quirks & fe->param.quirk_on) && 508 !(dev->quirks & fe->param.quirk_off)) 509 continue; 510 511 dev->quirks |= fe->param.quirk_on; 512 dev->quirks &= ~fe->param.quirk_off; 513 514 ata_dev_notice(dev, "FORCE: modified (%s)\n", 515 fe->param.name); 516 } 517 } 518 #else 519 static inline void ata_force_pflags(struct ata_port *ap) { } 520 static inline void ata_force_link_limits(struct ata_link *link) { } 521 static inline void ata_force_xfermask(struct ata_device *dev) { } 522 static inline void ata_force_quirks(struct ata_device *dev) { } 523 #endif 524 525 /** 526 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode 527 * @opcode: SCSI opcode 528 * 529 * Determine ATAPI command type from @opcode. 530 * 531 * LOCKING: 532 * None. 533 * 534 * RETURNS: 535 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC} 536 */ 537 int atapi_cmd_type(u8 opcode) 538 { 539 switch (opcode) { 540 case GPCMD_READ_10: 541 case GPCMD_READ_12: 542 return ATAPI_READ; 543 544 case GPCMD_WRITE_10: 545 case GPCMD_WRITE_12: 546 case GPCMD_WRITE_AND_VERIFY_10: 547 return ATAPI_WRITE; 548 549 case GPCMD_READ_CD: 550 case GPCMD_READ_CD_MSF: 551 return ATAPI_READ_CD; 552 553 case ATA_16: 554 case ATA_12: 555 if (atapi_passthru16) 556 return ATAPI_PASS_THRU; 557 fallthrough; 558 default: 559 return ATAPI_MISC; 560 } 561 } 562 EXPORT_SYMBOL_GPL(atapi_cmd_type); 563 564 static const u8 ata_rw_cmds[] = { 565 /* pio multi */ 566 ATA_CMD_READ_MULTI, 567 ATA_CMD_WRITE_MULTI, 568 ATA_CMD_READ_MULTI_EXT, 569 ATA_CMD_WRITE_MULTI_EXT, 570 0, 571 0, 572 0, 573 0, 574 /* pio */ 575 ATA_CMD_PIO_READ, 576 ATA_CMD_PIO_WRITE, 577 ATA_CMD_PIO_READ_EXT, 578 ATA_CMD_PIO_WRITE_EXT, 579 0, 580 0, 581 0, 582 0, 583 /* dma */ 584 ATA_CMD_READ, 585 ATA_CMD_WRITE, 586 ATA_CMD_READ_EXT, 587 ATA_CMD_WRITE_EXT, 588 0, 589 0, 590 0, 591 ATA_CMD_WRITE_FUA_EXT 592 }; 593 594 /** 595 * ata_set_rwcmd_protocol - set taskfile r/w command and protocol 596 * @dev: target device for the taskfile 597 * @tf: taskfile to examine and configure 598 * 599 * Examine the device configuration and tf->flags to determine 600 * the proper read/write command and protocol to use for @tf. 601 * 602 * LOCKING: 603 * caller. 604 */ 605 static bool ata_set_rwcmd_protocol(struct ata_device *dev, 606 struct ata_taskfile *tf) 607 { 608 u8 cmd; 609 610 int index, fua, lba48, write; 611 612 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; 613 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; 614 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; 615 616 if (dev->flags & ATA_DFLAG_PIO) { 617 tf->protocol = ATA_PROT_PIO; 618 index = dev->multi_count ? 0 : 8; 619 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { 620 /* Unable to use DMA due to host limitation */ 621 tf->protocol = ATA_PROT_PIO; 622 index = dev->multi_count ? 0 : 8; 623 } else { 624 tf->protocol = ATA_PROT_DMA; 625 index = 16; 626 } 627 628 cmd = ata_rw_cmds[index + fua + lba48 + write]; 629 if (!cmd) 630 return false; 631 632 tf->command = cmd; 633 634 return true; 635 } 636 637 /** 638 * ata_tf_read_block - Read block address from ATA taskfile 639 * @tf: ATA taskfile of interest 640 * @dev: ATA device @tf belongs to 641 * 642 * LOCKING: 643 * None. 644 * 645 * Read block address from @tf. This function can handle all 646 * three address formats - LBA, LBA48 and CHS. tf->protocol and 647 * flags select the address format to use. 648 * 649 * RETURNS: 650 * Block address read from @tf. 651 */ 652 u64 ata_tf_read_block(const struct ata_taskfile *tf, struct ata_device *dev) 653 { 654 u64 block = 0; 655 656 if (tf->flags & ATA_TFLAG_LBA) { 657 if (tf->flags & ATA_TFLAG_LBA48) { 658 block |= (u64)tf->hob_lbah << 40; 659 block |= (u64)tf->hob_lbam << 32; 660 block |= (u64)tf->hob_lbal << 24; 661 } else 662 block |= (tf->device & 0xf) << 24; 663 664 block |= tf->lbah << 16; 665 block |= tf->lbam << 8; 666 block |= tf->lbal; 667 } else { 668 u32 cyl, head, sect; 669 670 cyl = tf->lbam | (tf->lbah << 8); 671 head = tf->device & 0xf; 672 sect = tf->lbal; 673 674 if (!sect) { 675 ata_dev_warn(dev, 676 "device reported invalid CHS sector 0\n"); 677 return U64_MAX; 678 } 679 680 block = (cyl * dev->heads + head) * dev->sectors + sect - 1; 681 } 682 683 return block; 684 } 685 686 /* 687 * Set a taskfile command duration limit index. 688 */ 689 static inline void ata_set_tf_cdl(struct ata_queued_cmd *qc, int cdl) 690 { 691 struct ata_taskfile *tf = &qc->tf; 692 693 if (tf->protocol == ATA_PROT_NCQ) 694 tf->auxiliary |= cdl; 695 else 696 tf->feature |= cdl; 697 698 /* 699 * Mark this command as having a CDL and request the result 700 * task file so that we can inspect the sense data available 701 * bit on completion. 702 */ 703 qc->flags |= ATA_QCFLAG_HAS_CDL | ATA_QCFLAG_RESULT_TF; 704 } 705 706 /** 707 * ata_build_rw_tf - Build ATA taskfile for given read/write request 708 * @qc: Metadata associated with the taskfile to build 709 * @block: Block address 710 * @n_block: Number of blocks 711 * @tf_flags: RW/FUA etc... 712 * @cdl: Command duration limit index 713 * @class: IO priority class 714 * 715 * LOCKING: 716 * None. 717 * 718 * Build ATA taskfile for the command @qc for read/write request described 719 * by @block, @n_block, @tf_flags and @class. 720 * 721 * RETURNS: 722 * 723 * 0 on success, -ERANGE if the request is too large for @dev, 724 * -EINVAL if the request is invalid. 725 */ 726 int ata_build_rw_tf(struct ata_queued_cmd *qc, u64 block, u32 n_block, 727 unsigned int tf_flags, int cdl, int class) 728 { 729 struct ata_taskfile *tf = &qc->tf; 730 struct ata_device *dev = qc->dev; 731 732 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 733 tf->flags |= tf_flags; 734 735 if (ata_ncq_enabled(dev)) { 736 /* yay, NCQ */ 737 if (!lba_48_ok(block, n_block)) 738 return -ERANGE; 739 740 tf->protocol = ATA_PROT_NCQ; 741 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; 742 743 if (tf->flags & ATA_TFLAG_WRITE) 744 tf->command = ATA_CMD_FPDMA_WRITE; 745 else 746 tf->command = ATA_CMD_FPDMA_READ; 747 748 tf->nsect = qc->hw_tag << 3; 749 tf->hob_feature = (n_block >> 8) & 0xff; 750 tf->feature = n_block & 0xff; 751 752 tf->hob_lbah = (block >> 40) & 0xff; 753 tf->hob_lbam = (block >> 32) & 0xff; 754 tf->hob_lbal = (block >> 24) & 0xff; 755 tf->lbah = (block >> 16) & 0xff; 756 tf->lbam = (block >> 8) & 0xff; 757 tf->lbal = block & 0xff; 758 759 tf->device = ATA_LBA; 760 if (tf->flags & ATA_TFLAG_FUA) 761 tf->device |= 1 << 7; 762 763 if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED && 764 class == IOPRIO_CLASS_RT) 765 tf->hob_nsect |= ATA_PRIO_HIGH << ATA_SHIFT_PRIO; 766 767 if ((dev->flags & ATA_DFLAG_CDL_ENABLED) && cdl) 768 ata_set_tf_cdl(qc, cdl); 769 770 } else if (dev->flags & ATA_DFLAG_LBA) { 771 tf->flags |= ATA_TFLAG_LBA; 772 773 if ((dev->flags & ATA_DFLAG_CDL_ENABLED) && cdl) 774 ata_set_tf_cdl(qc, cdl); 775 776 /* Both FUA writes and a CDL index require 48-bit commands */ 777 if (!(tf->flags & ATA_TFLAG_FUA) && 778 !(qc->flags & ATA_QCFLAG_HAS_CDL) && 779 lba_28_ok(block, n_block)) { 780 /* use LBA28 */ 781 tf->device |= (block >> 24) & 0xf; 782 } else if (lba_48_ok(block, n_block)) { 783 if (!(dev->flags & ATA_DFLAG_LBA48)) 784 return -ERANGE; 785 786 /* use LBA48 */ 787 tf->flags |= ATA_TFLAG_LBA48; 788 789 tf->hob_nsect = (n_block >> 8) & 0xff; 790 791 tf->hob_lbah = (block >> 40) & 0xff; 792 tf->hob_lbam = (block >> 32) & 0xff; 793 tf->hob_lbal = (block >> 24) & 0xff; 794 } else { 795 /* request too large even for LBA48 */ 796 return -ERANGE; 797 } 798 799 if (unlikely(!ata_set_rwcmd_protocol(dev, tf))) 800 return -EINVAL; 801 802 tf->nsect = n_block & 0xff; 803 804 tf->lbah = (block >> 16) & 0xff; 805 tf->lbam = (block >> 8) & 0xff; 806 tf->lbal = block & 0xff; 807 808 tf->device |= ATA_LBA; 809 } else { 810 /* CHS */ 811 u32 sect, head, cyl, track; 812 813 /* The request -may- be too large for CHS addressing. */ 814 if (!lba_28_ok(block, n_block)) 815 return -ERANGE; 816 817 if (unlikely(!ata_set_rwcmd_protocol(dev, tf))) 818 return -EINVAL; 819 820 /* Convert LBA to CHS */ 821 track = (u32)block / dev->sectors; 822 cyl = track / dev->heads; 823 head = track % dev->heads; 824 sect = (u32)block % dev->sectors + 1; 825 826 /* Check whether the converted CHS can fit. 827 Cylinder: 0-65535 828 Head: 0-15 829 Sector: 1-255*/ 830 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 831 return -ERANGE; 832 833 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 834 tf->lbal = sect; 835 tf->lbam = cyl; 836 tf->lbah = cyl >> 8; 837 tf->device |= head; 838 } 839 840 return 0; 841 } 842 843 /** 844 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask 845 * @pio_mask: pio_mask 846 * @mwdma_mask: mwdma_mask 847 * @udma_mask: udma_mask 848 * 849 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single 850 * unsigned int xfer_mask. 851 * 852 * LOCKING: 853 * None. 854 * 855 * RETURNS: 856 * Packed xfer_mask. 857 */ 858 unsigned int ata_pack_xfermask(unsigned int pio_mask, 859 unsigned int mwdma_mask, 860 unsigned int udma_mask) 861 { 862 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | 863 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | 864 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); 865 } 866 EXPORT_SYMBOL_GPL(ata_pack_xfermask); 867 868 /** 869 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks 870 * @xfer_mask: xfer_mask to unpack 871 * @pio_mask: resulting pio_mask 872 * @mwdma_mask: resulting mwdma_mask 873 * @udma_mask: resulting udma_mask 874 * 875 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. 876 * Any NULL destination masks will be ignored. 877 */ 878 void ata_unpack_xfermask(unsigned int xfer_mask, unsigned int *pio_mask, 879 unsigned int *mwdma_mask, unsigned int *udma_mask) 880 { 881 if (pio_mask) 882 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; 883 if (mwdma_mask) 884 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; 885 if (udma_mask) 886 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; 887 } 888 889 static const struct ata_xfer_ent { 890 int shift, bits; 891 u8 base; 892 } ata_xfer_tbl[] = { 893 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 }, 894 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 }, 895 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 }, 896 { -1, }, 897 }; 898 899 /** 900 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask 901 * @xfer_mask: xfer_mask of interest 902 * 903 * Return matching XFER_* value for @xfer_mask. Only the highest 904 * bit of @xfer_mask is considered. 905 * 906 * LOCKING: 907 * None. 908 * 909 * RETURNS: 910 * Matching XFER_* value, 0xff if no match found. 911 */ 912 u8 ata_xfer_mask2mode(unsigned int xfer_mask) 913 { 914 int highbit = fls(xfer_mask) - 1; 915 const struct ata_xfer_ent *ent; 916 917 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 918 if (highbit >= ent->shift && highbit < ent->shift + ent->bits) 919 return ent->base + highbit - ent->shift; 920 return 0xff; 921 } 922 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode); 923 924 /** 925 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* 926 * @xfer_mode: XFER_* of interest 927 * 928 * Return matching xfer_mask for @xfer_mode. 929 * 930 * LOCKING: 931 * None. 932 * 933 * RETURNS: 934 * Matching xfer_mask, 0 if no match found. 935 */ 936 unsigned int ata_xfer_mode2mask(u8 xfer_mode) 937 { 938 const struct ata_xfer_ent *ent; 939 940 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 941 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 942 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1) 943 & ~((1 << ent->shift) - 1); 944 return 0; 945 } 946 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask); 947 948 /** 949 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* 950 * @xfer_mode: XFER_* of interest 951 * 952 * Return matching xfer_shift for @xfer_mode. 953 * 954 * LOCKING: 955 * None. 956 * 957 * RETURNS: 958 * Matching xfer_shift, -1 if no match found. 959 */ 960 int ata_xfer_mode2shift(u8 xfer_mode) 961 { 962 const struct ata_xfer_ent *ent; 963 964 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 965 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 966 return ent->shift; 967 return -1; 968 } 969 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift); 970 971 /** 972 * ata_mode_string - convert xfer_mask to string 973 * @xfer_mask: mask of bits supported; only highest bit counts. 974 * 975 * Determine string which represents the highest speed 976 * (highest bit in @modemask). 977 * 978 * LOCKING: 979 * None. 980 * 981 * RETURNS: 982 * Constant C string representing highest speed listed in 983 * @mode_mask, or the constant C string "<n/a>". 984 */ 985 const char *ata_mode_string(unsigned int xfer_mask) 986 { 987 static const char * const xfer_mode_str[] = { 988 "PIO0", 989 "PIO1", 990 "PIO2", 991 "PIO3", 992 "PIO4", 993 "PIO5", 994 "PIO6", 995 "MWDMA0", 996 "MWDMA1", 997 "MWDMA2", 998 "MWDMA3", 999 "MWDMA4", 1000 "UDMA/16", 1001 "UDMA/25", 1002 "UDMA/33", 1003 "UDMA/44", 1004 "UDMA/66", 1005 "UDMA/100", 1006 "UDMA/133", 1007 "UDMA7", 1008 }; 1009 int highbit; 1010 1011 highbit = fls(xfer_mask) - 1; 1012 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) 1013 return xfer_mode_str[highbit]; 1014 return "<n/a>"; 1015 } 1016 EXPORT_SYMBOL_GPL(ata_mode_string); 1017 1018 const char *sata_spd_string(unsigned int spd) 1019 { 1020 static const char * const spd_str[] = { 1021 "1.5 Gbps", 1022 "3.0 Gbps", 1023 "6.0 Gbps", 1024 }; 1025 1026 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) 1027 return "<unknown>"; 1028 return spd_str[spd - 1]; 1029 } 1030 1031 /** 1032 * ata_dev_classify - determine device type based on ATA-spec signature 1033 * @tf: ATA taskfile register set for device to be identified 1034 * 1035 * Determine from taskfile register contents whether a device is 1036 * ATA or ATAPI, as per "Signature and persistence" section 1037 * of ATA/PI spec (volume 1, sect 5.14). 1038 * 1039 * LOCKING: 1040 * None. 1041 * 1042 * RETURNS: 1043 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP, 1044 * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure. 1045 */ 1046 unsigned int ata_dev_classify(const struct ata_taskfile *tf) 1047 { 1048 /* Apple's open source Darwin code hints that some devices only 1049 * put a proper signature into the LBA mid/high registers, 1050 * So, we only check those. It's sufficient for uniqueness. 1051 * 1052 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate 1053 * signatures for ATA and ATAPI devices attached on SerialATA, 1054 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA 1055 * spec has never mentioned about using different signatures 1056 * for ATA/ATAPI devices. Then, Serial ATA II: Port 1057 * Multiplier specification began to use 0x69/0x96 to identify 1058 * port multpliers and 0x3c/0xc3 to identify SEMB device. 1059 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and 1060 * 0x69/0x96 shortly and described them as reserved for 1061 * SerialATA. 1062 * 1063 * We follow the current spec and consider that 0x69/0x96 1064 * identifies a port multiplier and 0x3c/0xc3 a SEMB device. 1065 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports 1066 * SEMB signature. This is worked around in 1067 * ata_dev_read_id(). 1068 */ 1069 if (tf->lbam == 0 && tf->lbah == 0) 1070 return ATA_DEV_ATA; 1071 1072 if (tf->lbam == 0x14 && tf->lbah == 0xeb) 1073 return ATA_DEV_ATAPI; 1074 1075 if (tf->lbam == 0x69 && tf->lbah == 0x96) 1076 return ATA_DEV_PMP; 1077 1078 if (tf->lbam == 0x3c && tf->lbah == 0xc3) 1079 return ATA_DEV_SEMB; 1080 1081 if (tf->lbam == 0xcd && tf->lbah == 0xab) 1082 return ATA_DEV_ZAC; 1083 1084 return ATA_DEV_UNKNOWN; 1085 } 1086 EXPORT_SYMBOL_GPL(ata_dev_classify); 1087 1088 /** 1089 * ata_id_string - Convert IDENTIFY DEVICE page into string 1090 * @id: IDENTIFY DEVICE results we will examine 1091 * @s: string into which data is output 1092 * @ofs: offset into identify device page 1093 * @len: length of string to return. must be an even number. 1094 * 1095 * The strings in the IDENTIFY DEVICE page are broken up into 1096 * 16-bit chunks. Run through the string, and output each 1097 * 8-bit chunk linearly, regardless of platform. 1098 * 1099 * LOCKING: 1100 * caller. 1101 */ 1102 1103 void ata_id_string(const u16 *id, unsigned char *s, 1104 unsigned int ofs, unsigned int len) 1105 { 1106 unsigned int c; 1107 1108 BUG_ON(len & 1); 1109 1110 while (len > 0) { 1111 c = id[ofs] >> 8; 1112 *s = c; 1113 s++; 1114 1115 c = id[ofs] & 0xff; 1116 *s = c; 1117 s++; 1118 1119 ofs++; 1120 len -= 2; 1121 } 1122 } 1123 EXPORT_SYMBOL_GPL(ata_id_string); 1124 1125 /** 1126 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string 1127 * @id: IDENTIFY DEVICE results we will examine 1128 * @s: string into which data is output 1129 * @ofs: offset into identify device page 1130 * @len: length of string to return. must be an odd number. 1131 * 1132 * This function is identical to ata_id_string except that it 1133 * trims trailing spaces and terminates the resulting string with 1134 * null. @len must be actual maximum length (even number) + 1. 1135 * 1136 * LOCKING: 1137 * caller. 1138 */ 1139 void ata_id_c_string(const u16 *id, unsigned char *s, 1140 unsigned int ofs, unsigned int len) 1141 { 1142 unsigned char *p; 1143 1144 ata_id_string(id, s, ofs, len - 1); 1145 1146 p = s + strnlen(s, len - 1); 1147 while (p > s && p[-1] == ' ') 1148 p--; 1149 *p = '\0'; 1150 } 1151 EXPORT_SYMBOL_GPL(ata_id_c_string); 1152 1153 static u64 ata_id_n_sectors(const u16 *id) 1154 { 1155 if (ata_id_has_lba(id)) { 1156 if (ata_id_has_lba48(id)) 1157 return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2); 1158 1159 return ata_id_u32(id, ATA_ID_LBA_CAPACITY); 1160 } 1161 1162 if (ata_id_current_chs_valid(id)) 1163 return (u32)id[ATA_ID_CUR_CYLS] * (u32)id[ATA_ID_CUR_HEADS] * 1164 (u32)id[ATA_ID_CUR_SECTORS]; 1165 1166 return (u32)id[ATA_ID_CYLS] * (u32)id[ATA_ID_HEADS] * 1167 (u32)id[ATA_ID_SECTORS]; 1168 } 1169 1170 u64 ata_tf_to_lba48(const struct ata_taskfile *tf) 1171 { 1172 u64 sectors = 0; 1173 1174 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; 1175 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; 1176 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24; 1177 sectors |= (tf->lbah & 0xff) << 16; 1178 sectors |= (tf->lbam & 0xff) << 8; 1179 sectors |= (tf->lbal & 0xff); 1180 1181 return sectors; 1182 } 1183 1184 u64 ata_tf_to_lba(const struct ata_taskfile *tf) 1185 { 1186 u64 sectors = 0; 1187 1188 sectors |= (tf->device & 0x0f) << 24; 1189 sectors |= (tf->lbah & 0xff) << 16; 1190 sectors |= (tf->lbam & 0xff) << 8; 1191 sectors |= (tf->lbal & 0xff); 1192 1193 return sectors; 1194 } 1195 1196 /** 1197 * ata_read_native_max_address - Read native max address 1198 * @dev: target device 1199 * @max_sectors: out parameter for the result native max address 1200 * 1201 * Perform an LBA48 or LBA28 native size query upon the device in 1202 * question. 1203 * 1204 * RETURNS: 1205 * 0 on success, -EACCES if command is aborted by the drive. 1206 * -EIO on other errors. 1207 */ 1208 static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors) 1209 { 1210 unsigned int err_mask; 1211 struct ata_taskfile tf; 1212 int lba48 = ata_id_has_lba48(dev->id); 1213 1214 ata_tf_init(dev, &tf); 1215 1216 /* always clear all address registers */ 1217 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1218 1219 if (lba48) { 1220 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; 1221 tf.flags |= ATA_TFLAG_LBA48; 1222 } else 1223 tf.command = ATA_CMD_READ_NATIVE_MAX; 1224 1225 tf.protocol = ATA_PROT_NODATA; 1226 tf.device |= ATA_LBA; 1227 1228 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 1229 if (err_mask) { 1230 ata_dev_warn(dev, 1231 "failed to read native max address (err_mask=0x%x)\n", 1232 err_mask); 1233 if (err_mask == AC_ERR_DEV && (tf.error & ATA_ABORTED)) 1234 return -EACCES; 1235 return -EIO; 1236 } 1237 1238 if (lba48) 1239 *max_sectors = ata_tf_to_lba48(&tf) + 1; 1240 else 1241 *max_sectors = ata_tf_to_lba(&tf) + 1; 1242 if (dev->quirks & ATA_QUIRK_HPA_SIZE) 1243 (*max_sectors)--; 1244 return 0; 1245 } 1246 1247 /** 1248 * ata_set_max_sectors - Set max sectors 1249 * @dev: target device 1250 * @new_sectors: new max sectors value to set for the device 1251 * 1252 * Set max sectors of @dev to @new_sectors. 1253 * 1254 * RETURNS: 1255 * 0 on success, -EACCES if command is aborted or denied (due to 1256 * previous non-volatile SET_MAX) by the drive. -EIO on other 1257 * errors. 1258 */ 1259 static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors) 1260 { 1261 unsigned int err_mask; 1262 struct ata_taskfile tf; 1263 int lba48 = ata_id_has_lba48(dev->id); 1264 1265 new_sectors--; 1266 1267 ata_tf_init(dev, &tf); 1268 1269 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1270 1271 if (lba48) { 1272 tf.command = ATA_CMD_SET_MAX_EXT; 1273 tf.flags |= ATA_TFLAG_LBA48; 1274 1275 tf.hob_lbal = (new_sectors >> 24) & 0xff; 1276 tf.hob_lbam = (new_sectors >> 32) & 0xff; 1277 tf.hob_lbah = (new_sectors >> 40) & 0xff; 1278 } else { 1279 tf.command = ATA_CMD_SET_MAX; 1280 1281 tf.device |= (new_sectors >> 24) & 0xf; 1282 } 1283 1284 tf.protocol = ATA_PROT_NODATA; 1285 tf.device |= ATA_LBA; 1286 1287 tf.lbal = (new_sectors >> 0) & 0xff; 1288 tf.lbam = (new_sectors >> 8) & 0xff; 1289 tf.lbah = (new_sectors >> 16) & 0xff; 1290 1291 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 1292 if (err_mask) { 1293 ata_dev_warn(dev, 1294 "failed to set max address (err_mask=0x%x)\n", 1295 err_mask); 1296 if (err_mask == AC_ERR_DEV && 1297 (tf.error & (ATA_ABORTED | ATA_IDNF))) 1298 return -EACCES; 1299 return -EIO; 1300 } 1301 1302 return 0; 1303 } 1304 1305 /** 1306 * ata_hpa_resize - Resize a device with an HPA set 1307 * @dev: Device to resize 1308 * 1309 * Read the size of an LBA28 or LBA48 disk with HPA features and resize 1310 * it if required to the full size of the media. The caller must check 1311 * the drive has the HPA feature set enabled. 1312 * 1313 * RETURNS: 1314 * 0 on success, -errno on failure. 1315 */ 1316 static int ata_hpa_resize(struct ata_device *dev) 1317 { 1318 bool print_info = ata_dev_print_info(dev); 1319 bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA; 1320 u64 sectors = ata_id_n_sectors(dev->id); 1321 u64 native_sectors; 1322 int rc; 1323 1324 /* do we need to do it? */ 1325 if ((dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) || 1326 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || 1327 (dev->quirks & ATA_QUIRK_BROKEN_HPA)) 1328 return 0; 1329 1330 /* read native max address */ 1331 rc = ata_read_native_max_address(dev, &native_sectors); 1332 if (rc) { 1333 /* If device aborted the command or HPA isn't going to 1334 * be unlocked, skip HPA resizing. 1335 */ 1336 if (rc == -EACCES || !unlock_hpa) { 1337 ata_dev_warn(dev, 1338 "HPA support seems broken, skipping HPA handling\n"); 1339 dev->quirks |= ATA_QUIRK_BROKEN_HPA; 1340 1341 /* we can continue if device aborted the command */ 1342 if (rc == -EACCES) 1343 rc = 0; 1344 } 1345 1346 return rc; 1347 } 1348 dev->n_native_sectors = native_sectors; 1349 1350 /* nothing to do? */ 1351 if (native_sectors <= sectors || !unlock_hpa) { 1352 if (!print_info || native_sectors == sectors) 1353 return 0; 1354 1355 if (native_sectors > sectors) 1356 ata_dev_info(dev, 1357 "HPA detected: current %llu, native %llu\n", 1358 (unsigned long long)sectors, 1359 (unsigned long long)native_sectors); 1360 else if (native_sectors < sectors) 1361 ata_dev_warn(dev, 1362 "native sectors (%llu) is smaller than sectors (%llu)\n", 1363 (unsigned long long)native_sectors, 1364 (unsigned long long)sectors); 1365 return 0; 1366 } 1367 1368 /* let's unlock HPA */ 1369 rc = ata_set_max_sectors(dev, native_sectors); 1370 if (rc == -EACCES) { 1371 /* if device aborted the command, skip HPA resizing */ 1372 ata_dev_warn(dev, 1373 "device aborted resize (%llu -> %llu), skipping HPA handling\n", 1374 (unsigned long long)sectors, 1375 (unsigned long long)native_sectors); 1376 dev->quirks |= ATA_QUIRK_BROKEN_HPA; 1377 return 0; 1378 } else if (rc) 1379 return rc; 1380 1381 /* re-read IDENTIFY data */ 1382 rc = ata_dev_reread_id(dev, 0); 1383 if (rc) { 1384 ata_dev_err(dev, 1385 "failed to re-read IDENTIFY data after HPA resizing\n"); 1386 return rc; 1387 } 1388 1389 if (print_info) { 1390 u64 new_sectors = ata_id_n_sectors(dev->id); 1391 ata_dev_info(dev, 1392 "HPA unlocked: %llu -> %llu, native %llu\n", 1393 (unsigned long long)sectors, 1394 (unsigned long long)new_sectors, 1395 (unsigned long long)native_sectors); 1396 } 1397 1398 return 0; 1399 } 1400 1401 /** 1402 * ata_dump_id - IDENTIFY DEVICE info debugging output 1403 * @dev: device from which the information is fetched 1404 * @id: IDENTIFY DEVICE page to dump 1405 * 1406 * Dump selected 16-bit words from the given IDENTIFY DEVICE 1407 * page. 1408 * 1409 * LOCKING: 1410 * caller. 1411 */ 1412 1413 static inline void ata_dump_id(struct ata_device *dev, const u16 *id) 1414 { 1415 ata_dev_dbg(dev, 1416 "49==0x%04x 53==0x%04x 63==0x%04x 64==0x%04x 75==0x%04x\n" 1417 "80==0x%04x 81==0x%04x 82==0x%04x 83==0x%04x 84==0x%04x\n" 1418 "88==0x%04x 93==0x%04x\n", 1419 id[49], id[53], id[63], id[64], id[75], id[80], 1420 id[81], id[82], id[83], id[84], id[88], id[93]); 1421 } 1422 1423 /** 1424 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data 1425 * @id: IDENTIFY data to compute xfer mask from 1426 * 1427 * Compute the xfermask for this device. This is not as trivial 1428 * as it seems if we must consider early devices correctly. 1429 * 1430 * FIXME: pre IDE drive timing (do we care ?). 1431 * 1432 * LOCKING: 1433 * None. 1434 * 1435 * RETURNS: 1436 * Computed xfermask 1437 */ 1438 unsigned int ata_id_xfermask(const u16 *id) 1439 { 1440 unsigned int pio_mask, mwdma_mask, udma_mask; 1441 1442 /* Usual case. Word 53 indicates word 64 is valid */ 1443 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { 1444 pio_mask = id[ATA_ID_PIO_MODES] & 0x03; 1445 pio_mask <<= 3; 1446 pio_mask |= 0x7; 1447 } else { 1448 /* If word 64 isn't valid then Word 51 high byte holds 1449 * the PIO timing number for the maximum. Turn it into 1450 * a mask. 1451 */ 1452 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; 1453 if (mode < 5) /* Valid PIO range */ 1454 pio_mask = (2 << mode) - 1; 1455 else 1456 pio_mask = 1; 1457 1458 /* But wait.. there's more. Design your standards by 1459 * committee and you too can get a free iordy field to 1460 * process. However it is the speeds not the modes that 1461 * are supported... Note drivers using the timing API 1462 * will get this right anyway 1463 */ 1464 } 1465 1466 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; 1467 1468 if (ata_id_is_cfa(id)) { 1469 /* 1470 * Process compact flash extended modes 1471 */ 1472 int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7; 1473 int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7; 1474 1475 if (pio) 1476 pio_mask |= (1 << 5); 1477 if (pio > 1) 1478 pio_mask |= (1 << 6); 1479 if (dma) 1480 mwdma_mask |= (1 << 3); 1481 if (dma > 1) 1482 mwdma_mask |= (1 << 4); 1483 } 1484 1485 udma_mask = 0; 1486 if (id[ATA_ID_FIELD_VALID] & (1 << 2)) 1487 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; 1488 1489 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 1490 } 1491 EXPORT_SYMBOL_GPL(ata_id_xfermask); 1492 1493 static void ata_qc_complete_internal(struct ata_queued_cmd *qc) 1494 { 1495 struct completion *waiting = qc->private_data; 1496 1497 complete(waiting); 1498 } 1499 1500 /** 1501 * ata_exec_internal - execute libata internal command 1502 * @dev: Device to which the command is sent 1503 * @tf: Taskfile registers for the command and the result 1504 * @cdb: CDB for packet command 1505 * @dma_dir: Data transfer direction of the command 1506 * @buf: Data buffer of the command 1507 * @buflen: Length of data buffer 1508 * @timeout: Timeout in msecs (0 for default) 1509 * 1510 * Executes libata internal command with timeout. @tf contains 1511 * the command on entry and the result on return. Timeout and error 1512 * conditions are reported via the return value. No recovery action 1513 * is taken after a command times out. It is the caller's duty to 1514 * clean up after timeout. 1515 * 1516 * LOCKING: 1517 * None. Should be called with kernel context, might sleep. 1518 * 1519 * RETURNS: 1520 * Zero on success, AC_ERR_* mask on failure 1521 */ 1522 unsigned int ata_exec_internal(struct ata_device *dev, struct ata_taskfile *tf, 1523 const u8 *cdb, enum dma_data_direction dma_dir, 1524 void *buf, unsigned int buflen, 1525 unsigned int timeout) 1526 { 1527 struct ata_link *link = dev->link; 1528 struct ata_port *ap = link->ap; 1529 u8 command = tf->command; 1530 struct ata_queued_cmd *qc; 1531 struct scatterlist sgl; 1532 unsigned int preempted_tag; 1533 u32 preempted_sactive; 1534 u64 preempted_qc_active; 1535 int preempted_nr_active_links; 1536 bool auto_timeout = false; 1537 DECLARE_COMPLETION_ONSTACK(wait); 1538 unsigned long flags; 1539 unsigned int err_mask; 1540 int rc; 1541 1542 if (WARN_ON(dma_dir != DMA_NONE && !buf)) 1543 return AC_ERR_INVALID; 1544 1545 spin_lock_irqsave(ap->lock, flags); 1546 1547 /* No internal command while frozen */ 1548 if (ata_port_is_frozen(ap)) { 1549 spin_unlock_irqrestore(ap->lock, flags); 1550 return AC_ERR_SYSTEM; 1551 } 1552 1553 /* Initialize internal qc */ 1554 qc = __ata_qc_from_tag(ap, ATA_TAG_INTERNAL); 1555 1556 qc->tag = ATA_TAG_INTERNAL; 1557 qc->hw_tag = 0; 1558 qc->scsicmd = NULL; 1559 qc->ap = ap; 1560 qc->dev = dev; 1561 ata_qc_reinit(qc); 1562 1563 preempted_tag = link->active_tag; 1564 preempted_sactive = link->sactive; 1565 preempted_qc_active = ap->qc_active; 1566 preempted_nr_active_links = ap->nr_active_links; 1567 link->active_tag = ATA_TAG_POISON; 1568 link->sactive = 0; 1569 ap->qc_active = 0; 1570 ap->nr_active_links = 0; 1571 1572 /* Prepare and issue qc */ 1573 qc->tf = *tf; 1574 if (cdb) 1575 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); 1576 1577 /* Some SATA bridges need us to indicate data xfer direction */ 1578 if (tf->protocol == ATAPI_PROT_DMA && (dev->flags & ATA_DFLAG_DMADIR) && 1579 dma_dir == DMA_FROM_DEVICE) 1580 qc->tf.feature |= ATAPI_DMADIR; 1581 1582 qc->flags |= ATA_QCFLAG_RESULT_TF; 1583 qc->dma_dir = dma_dir; 1584 if (dma_dir != DMA_NONE) { 1585 sg_init_one(&sgl, buf, buflen); 1586 ata_sg_init(qc, &sgl, 1); 1587 qc->nbytes = buflen; 1588 } 1589 1590 qc->private_data = &wait; 1591 qc->complete_fn = ata_qc_complete_internal; 1592 1593 ata_qc_issue(qc); 1594 1595 spin_unlock_irqrestore(ap->lock, flags); 1596 1597 if (!timeout) { 1598 if (ata_probe_timeout) { 1599 timeout = ata_probe_timeout * 1000; 1600 } else { 1601 timeout = ata_internal_cmd_timeout(dev, command); 1602 auto_timeout = true; 1603 } 1604 } 1605 1606 ata_eh_release(ap); 1607 1608 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout)); 1609 1610 ata_eh_acquire(ap); 1611 1612 ata_sff_flush_pio_task(ap); 1613 1614 if (!rc) { 1615 /* 1616 * We are racing with irq here. If we lose, the following test 1617 * prevents us from completing the qc twice. If we win, the port 1618 * is frozen and will be cleaned up by ->post_internal_cmd(). 1619 */ 1620 spin_lock_irqsave(ap->lock, flags); 1621 if (qc->flags & ATA_QCFLAG_ACTIVE) { 1622 qc->err_mask |= AC_ERR_TIMEOUT; 1623 ata_port_freeze(ap); 1624 ata_dev_warn(dev, "qc timeout after %u msecs (cmd 0x%x)\n", 1625 timeout, command); 1626 } 1627 spin_unlock_irqrestore(ap->lock, flags); 1628 } 1629 1630 if (ap->ops->post_internal_cmd) 1631 ap->ops->post_internal_cmd(qc); 1632 1633 /* Perform minimal error analysis */ 1634 if (qc->flags & ATA_QCFLAG_EH) { 1635 if (qc->result_tf.status & (ATA_ERR | ATA_DF)) 1636 qc->err_mask |= AC_ERR_DEV; 1637 1638 if (!qc->err_mask) 1639 qc->err_mask |= AC_ERR_OTHER; 1640 1641 if (qc->err_mask & ~AC_ERR_OTHER) 1642 qc->err_mask &= ~AC_ERR_OTHER; 1643 } else if (qc->tf.command == ATA_CMD_REQ_SENSE_DATA) { 1644 qc->result_tf.status |= ATA_SENSE; 1645 } 1646 1647 /* Finish up */ 1648 spin_lock_irqsave(ap->lock, flags); 1649 1650 *tf = qc->result_tf; 1651 err_mask = qc->err_mask; 1652 1653 ata_qc_free(qc); 1654 link->active_tag = preempted_tag; 1655 link->sactive = preempted_sactive; 1656 ap->qc_active = preempted_qc_active; 1657 ap->nr_active_links = preempted_nr_active_links; 1658 1659 spin_unlock_irqrestore(ap->lock, flags); 1660 1661 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout) 1662 ata_internal_cmd_timed_out(dev, command); 1663 1664 return err_mask; 1665 } 1666 1667 /** 1668 * ata_pio_need_iordy - check if iordy needed 1669 * @adev: ATA device 1670 * 1671 * Check if the current speed of the device requires IORDY. Used 1672 * by various controllers for chip configuration. 1673 */ 1674 unsigned int ata_pio_need_iordy(const struct ata_device *adev) 1675 { 1676 /* Don't set IORDY if we're preparing for reset. IORDY may 1677 * lead to controller lock up on certain controllers if the 1678 * port is not occupied. See bko#11703 for details. 1679 */ 1680 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING) 1681 return 0; 1682 /* Controller doesn't support IORDY. Probably a pointless 1683 * check as the caller should know this. 1684 */ 1685 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) 1686 return 0; 1687 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */ 1688 if (ata_id_is_cfa(adev->id) 1689 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6)) 1690 return 0; 1691 /* PIO3 and higher it is mandatory */ 1692 if (adev->pio_mode > XFER_PIO_2) 1693 return 1; 1694 /* We turn it on when possible */ 1695 if (ata_id_has_iordy(adev->id)) 1696 return 1; 1697 return 0; 1698 } 1699 EXPORT_SYMBOL_GPL(ata_pio_need_iordy); 1700 1701 /** 1702 * ata_pio_mask_no_iordy - Return the non IORDY mask 1703 * @adev: ATA device 1704 * 1705 * Compute the highest mode possible if we are not using iordy. Return 1706 * -1 if no iordy mode is available. 1707 */ 1708 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) 1709 { 1710 /* If we have no drive specific rule, then PIO 2 is non IORDY */ 1711 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ 1712 u16 pio = adev->id[ATA_ID_EIDE_PIO]; 1713 /* Is the speed faster than the drive allows non IORDY ? */ 1714 if (pio) { 1715 /* This is cycle times not frequency - watch the logic! */ 1716 if (pio > 240) /* PIO2 is 240nS per cycle */ 1717 return 3 << ATA_SHIFT_PIO; 1718 return 7 << ATA_SHIFT_PIO; 1719 } 1720 } 1721 return 3 << ATA_SHIFT_PIO; 1722 } 1723 1724 /** 1725 * ata_do_dev_read_id - default ID read method 1726 * @dev: device 1727 * @tf: proposed taskfile 1728 * @id: data buffer 1729 * 1730 * Issue the identify taskfile and hand back the buffer containing 1731 * identify data. For some RAID controllers and for pre ATA devices 1732 * this function is wrapped or replaced by the driver 1733 */ 1734 unsigned int ata_do_dev_read_id(struct ata_device *dev, 1735 struct ata_taskfile *tf, __le16 *id) 1736 { 1737 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE, 1738 id, sizeof(id[0]) * ATA_ID_WORDS, 0); 1739 } 1740 EXPORT_SYMBOL_GPL(ata_do_dev_read_id); 1741 1742 /** 1743 * ata_dev_read_id - Read ID data from the specified device 1744 * @dev: target device 1745 * @p_class: pointer to class of the target device (may be changed) 1746 * @flags: ATA_READID_* flags 1747 * @id: buffer to read IDENTIFY data into 1748 * 1749 * Read ID data from the specified device. ATA_CMD_ID_ATA is 1750 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI 1751 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS 1752 * for pre-ATA4 drives. 1753 * 1754 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right 1755 * now we abort if we hit that case. 1756 * 1757 * LOCKING: 1758 * Kernel thread context (may sleep) 1759 * 1760 * RETURNS: 1761 * 0 on success, -errno otherwise. 1762 */ 1763 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, 1764 unsigned int flags, u16 *id) 1765 { 1766 struct ata_port *ap = dev->link->ap; 1767 unsigned int class = *p_class; 1768 struct ata_taskfile tf; 1769 unsigned int err_mask = 0; 1770 const char *reason; 1771 bool is_semb = class == ATA_DEV_SEMB; 1772 int may_fallback = 1, tried_spinup = 0; 1773 int rc; 1774 1775 retry: 1776 ata_tf_init(dev, &tf); 1777 1778 switch (class) { 1779 case ATA_DEV_SEMB: 1780 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */ 1781 fallthrough; 1782 case ATA_DEV_ATA: 1783 case ATA_DEV_ZAC: 1784 tf.command = ATA_CMD_ID_ATA; 1785 break; 1786 case ATA_DEV_ATAPI: 1787 tf.command = ATA_CMD_ID_ATAPI; 1788 break; 1789 default: 1790 rc = -ENODEV; 1791 reason = "unsupported class"; 1792 goto err_out; 1793 } 1794 1795 tf.protocol = ATA_PROT_PIO; 1796 1797 /* Some devices choke if TF registers contain garbage. Make 1798 * sure those are properly initialized. 1799 */ 1800 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1801 1802 /* Device presence detection is unreliable on some 1803 * controllers. Always poll IDENTIFY if available. 1804 */ 1805 tf.flags |= ATA_TFLAG_POLLING; 1806 1807 if (ap->ops->read_id) 1808 err_mask = ap->ops->read_id(dev, &tf, (__le16 *)id); 1809 else 1810 err_mask = ata_do_dev_read_id(dev, &tf, (__le16 *)id); 1811 1812 if (err_mask) { 1813 if (err_mask & AC_ERR_NODEV_HINT) { 1814 ata_dev_dbg(dev, "NODEV after polling detection\n"); 1815 return -ENOENT; 1816 } 1817 1818 if (is_semb) { 1819 ata_dev_info(dev, 1820 "IDENTIFY failed on device w/ SEMB sig, disabled\n"); 1821 /* SEMB is not supported yet */ 1822 *p_class = ATA_DEV_SEMB_UNSUP; 1823 return 0; 1824 } 1825 1826 if ((err_mask == AC_ERR_DEV) && (tf.error & ATA_ABORTED)) { 1827 /* Device or controller might have reported 1828 * the wrong device class. Give a shot at the 1829 * other IDENTIFY if the current one is 1830 * aborted by the device. 1831 */ 1832 if (may_fallback) { 1833 may_fallback = 0; 1834 1835 if (class == ATA_DEV_ATA) 1836 class = ATA_DEV_ATAPI; 1837 else 1838 class = ATA_DEV_ATA; 1839 goto retry; 1840 } 1841 1842 /* Control reaches here iff the device aborted 1843 * both flavors of IDENTIFYs which happens 1844 * sometimes with phantom devices. 1845 */ 1846 ata_dev_dbg(dev, 1847 "both IDENTIFYs aborted, assuming NODEV\n"); 1848 return -ENOENT; 1849 } 1850 1851 rc = -EIO; 1852 reason = "I/O error"; 1853 goto err_out; 1854 } 1855 1856 if (dev->quirks & ATA_QUIRK_DUMP_ID) { 1857 ata_dev_info(dev, "dumping IDENTIFY data, " 1858 "class=%d may_fallback=%d tried_spinup=%d\n", 1859 class, may_fallback, tried_spinup); 1860 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 1861 16, 2, id, ATA_ID_WORDS * sizeof(*id), true); 1862 } 1863 1864 /* Falling back doesn't make sense if ID data was read 1865 * successfully at least once. 1866 */ 1867 may_fallback = 0; 1868 1869 swap_buf_le16(id, ATA_ID_WORDS); 1870 1871 /* sanity check */ 1872 rc = -EINVAL; 1873 reason = "device reports invalid type"; 1874 1875 if (class == ATA_DEV_ATA || class == ATA_DEV_ZAC) { 1876 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) 1877 goto err_out; 1878 if (ap->host->flags & ATA_HOST_IGNORE_ATA && 1879 ata_id_is_ata(id)) { 1880 ata_dev_dbg(dev, 1881 "host indicates ignore ATA devices, ignored\n"); 1882 return -ENOENT; 1883 } 1884 } else { 1885 if (ata_id_is_ata(id)) 1886 goto err_out; 1887 } 1888 1889 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { 1890 tried_spinup = 1; 1891 /* 1892 * Drive powered-up in standby mode, and requires a specific 1893 * SET_FEATURES spin-up subcommand before it will accept 1894 * anything other than the original IDENTIFY command. 1895 */ 1896 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0); 1897 if (err_mask && id[2] != 0x738c) { 1898 rc = -EIO; 1899 reason = "SPINUP failed"; 1900 goto err_out; 1901 } 1902 /* 1903 * If the drive initially returned incomplete IDENTIFY info, 1904 * we now must reissue the IDENTIFY command. 1905 */ 1906 if (id[2] == 0x37c8) 1907 goto retry; 1908 } 1909 1910 if ((flags & ATA_READID_POSTRESET) && 1911 (class == ATA_DEV_ATA || class == ATA_DEV_ZAC)) { 1912 /* 1913 * The exact sequence expected by certain pre-ATA4 drives is: 1914 * SRST RESET 1915 * IDENTIFY (optional in early ATA) 1916 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA) 1917 * anything else.. 1918 * Some drives were very specific about that exact sequence. 1919 * 1920 * Note that ATA4 says lba is mandatory so the second check 1921 * should never trigger. 1922 */ 1923 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { 1924 err_mask = ata_dev_init_params(dev, id[3], id[6]); 1925 if (err_mask) { 1926 rc = -EIO; 1927 reason = "INIT_DEV_PARAMS failed"; 1928 goto err_out; 1929 } 1930 1931 /* current CHS translation info (id[53-58]) might be 1932 * changed. reread the identify device info. 1933 */ 1934 flags &= ~ATA_READID_POSTRESET; 1935 goto retry; 1936 } 1937 } 1938 1939 *p_class = class; 1940 1941 return 0; 1942 1943 err_out: 1944 ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n", 1945 reason, err_mask); 1946 return rc; 1947 } 1948 1949 bool ata_dev_power_init_tf(struct ata_device *dev, struct ata_taskfile *tf, 1950 bool set_active) 1951 { 1952 /* Only applies to ATA and ZAC devices */ 1953 if (dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) 1954 return false; 1955 1956 ata_tf_init(dev, tf); 1957 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1958 tf->protocol = ATA_PROT_NODATA; 1959 1960 if (set_active) { 1961 /* VERIFY for 1 sector at lba=0 */ 1962 tf->command = ATA_CMD_VERIFY; 1963 tf->nsect = 1; 1964 if (dev->flags & ATA_DFLAG_LBA) { 1965 tf->flags |= ATA_TFLAG_LBA; 1966 tf->device |= ATA_LBA; 1967 } else { 1968 /* CHS */ 1969 tf->lbal = 0x1; /* sect */ 1970 } 1971 } else { 1972 tf->command = ATA_CMD_STANDBYNOW1; 1973 } 1974 1975 return true; 1976 } 1977 1978 static bool ata_dev_power_is_active(struct ata_device *dev) 1979 { 1980 struct ata_taskfile tf; 1981 unsigned int err_mask; 1982 1983 ata_tf_init(dev, &tf); 1984 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1985 tf.protocol = ATA_PROT_NODATA; 1986 tf.command = ATA_CMD_CHK_POWER; 1987 1988 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 1989 if (err_mask) { 1990 ata_dev_err(dev, "Check power mode failed (err_mask=0x%x)\n", 1991 err_mask); 1992 /* 1993 * Assume we are in standby mode so that we always force a 1994 * spinup in ata_dev_power_set_active(). 1995 */ 1996 return false; 1997 } 1998 1999 ata_dev_dbg(dev, "Power mode: 0x%02x\n", tf.nsect); 2000 2001 /* Active or idle */ 2002 return tf.nsect == 0xff; 2003 } 2004 2005 /** 2006 * ata_dev_power_set_standby - Set a device power mode to standby 2007 * @dev: target device 2008 * 2009 * Issue a STANDBY IMMEDIATE command to set a device power mode to standby. 2010 * For an HDD device, this spins down the disks. 2011 * 2012 * LOCKING: 2013 * Kernel thread context (may sleep). 2014 */ 2015 void ata_dev_power_set_standby(struct ata_device *dev) 2016 { 2017 unsigned long ap_flags = dev->link->ap->flags; 2018 struct ata_taskfile tf; 2019 unsigned int err_mask; 2020 2021 /* If the device is already sleeping or in standby, do nothing. */ 2022 if ((dev->flags & ATA_DFLAG_SLEEPING) || 2023 !ata_dev_power_is_active(dev)) 2024 return; 2025 2026 /* 2027 * Some odd clown BIOSes issue spindown on power off (ACPI S4 or S5) 2028 * causing some drives to spin up and down again. For these, do nothing 2029 * if we are being called on shutdown. 2030 */ 2031 if ((ap_flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 2032 system_state == SYSTEM_POWER_OFF) 2033 return; 2034 2035 if ((ap_flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 2036 system_entering_hibernation()) 2037 return; 2038 2039 /* Issue STANDBY IMMEDIATE command only if supported by the device */ 2040 if (!ata_dev_power_init_tf(dev, &tf, false)) 2041 return; 2042 2043 ata_dev_notice(dev, "Entering standby power mode\n"); 2044 2045 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 2046 if (err_mask) 2047 ata_dev_err(dev, "STANDBY IMMEDIATE failed (err_mask=0x%x)\n", 2048 err_mask); 2049 } 2050 2051 /** 2052 * ata_dev_power_set_active - Set a device power mode to active 2053 * @dev: target device 2054 * 2055 * Issue a VERIFY command to enter to ensure that the device is in the 2056 * active power mode. For a spun-down HDD (standby or idle power mode), 2057 * the VERIFY command will complete after the disk spins up. 2058 * 2059 * LOCKING: 2060 * Kernel thread context (may sleep). 2061 */ 2062 void ata_dev_power_set_active(struct ata_device *dev) 2063 { 2064 struct ata_taskfile tf; 2065 unsigned int err_mask; 2066 2067 /* 2068 * Issue READ VERIFY SECTORS command for 1 sector at lba=0 only 2069 * if supported by the device. 2070 */ 2071 if (!ata_dev_power_init_tf(dev, &tf, true)) 2072 return; 2073 2074 /* 2075 * Check the device power state & condition and force a spinup with 2076 * VERIFY command only if the drive is not already ACTIVE or IDLE. 2077 */ 2078 if (ata_dev_power_is_active(dev)) 2079 return; 2080 2081 ata_dev_notice(dev, "Entering active power mode\n"); 2082 2083 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 2084 if (err_mask) 2085 ata_dev_err(dev, "VERIFY failed (err_mask=0x%x)\n", 2086 err_mask); 2087 } 2088 2089 /** 2090 * ata_read_log_page - read a specific log page 2091 * @dev: target device 2092 * @log: log to read 2093 * @page: page to read 2094 * @buf: buffer to store read page 2095 * @sectors: number of sectors to read 2096 * 2097 * Read log page using READ_LOG_EXT command. 2098 * 2099 * LOCKING: 2100 * Kernel thread context (may sleep). 2101 * 2102 * RETURNS: 2103 * 0 on success, AC_ERR_* mask otherwise. 2104 */ 2105 unsigned int ata_read_log_page(struct ata_device *dev, u8 log, 2106 u8 page, void *buf, unsigned int sectors) 2107 { 2108 unsigned long ap_flags = dev->link->ap->flags; 2109 struct ata_taskfile tf; 2110 unsigned int err_mask; 2111 bool dma = false; 2112 2113 ata_dev_dbg(dev, "read log page - log 0x%x, page 0x%x\n", log, page); 2114 2115 /* 2116 * Return error without actually issuing the command on controllers 2117 * which e.g. lockup on a read log page. 2118 */ 2119 if (ap_flags & ATA_FLAG_NO_LOG_PAGE) 2120 return AC_ERR_DEV; 2121 2122 retry: 2123 ata_tf_init(dev, &tf); 2124 if (ata_dma_enabled(dev) && ata_id_has_read_log_dma_ext(dev->id) && 2125 !(dev->quirks & ATA_QUIRK_NO_DMA_LOG)) { 2126 tf.command = ATA_CMD_READ_LOG_DMA_EXT; 2127 tf.protocol = ATA_PROT_DMA; 2128 dma = true; 2129 } else { 2130 tf.command = ATA_CMD_READ_LOG_EXT; 2131 tf.protocol = ATA_PROT_PIO; 2132 dma = false; 2133 } 2134 tf.lbal = log; 2135 tf.lbam = page; 2136 tf.nsect = sectors; 2137 tf.hob_nsect = sectors >> 8; 2138 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE; 2139 2140 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, 2141 buf, sectors * ATA_SECT_SIZE, 0); 2142 2143 if (err_mask) { 2144 if (dma) { 2145 dev->quirks |= ATA_QUIRK_NO_DMA_LOG; 2146 if (!ata_port_is_frozen(dev->link->ap)) 2147 goto retry; 2148 } 2149 ata_dev_err(dev, 2150 "Read log 0x%02x page 0x%02x failed, Emask 0x%x\n", 2151 (unsigned int)log, (unsigned int)page, err_mask); 2152 } 2153 2154 return err_mask; 2155 } 2156 2157 static inline void ata_clear_log_directory(struct ata_device *dev) 2158 { 2159 memset(dev->gp_log_dir, 0, ATA_SECT_SIZE); 2160 } 2161 2162 static int ata_read_log_directory(struct ata_device *dev) 2163 { 2164 u16 version; 2165 2166 /* If the log page is already cached, do nothing. */ 2167 version = get_unaligned_le16(&dev->gp_log_dir[0]); 2168 if (version == 0x0001) 2169 return 0; 2170 2171 if (ata_read_log_page(dev, ATA_LOG_DIRECTORY, 0, dev->gp_log_dir, 1)) { 2172 ata_clear_log_directory(dev); 2173 return -EIO; 2174 } 2175 2176 version = get_unaligned_le16(&dev->gp_log_dir[0]); 2177 if (version != 0x0001) 2178 ata_dev_warn_once(dev, 2179 "Invalid log directory version 0x%04x\n", 2180 version); 2181 2182 return 0; 2183 } 2184 2185 static int ata_log_supported(struct ata_device *dev, u8 log) 2186 { 2187 if (dev->quirks & ATA_QUIRK_NO_LOG_DIR) 2188 return 0; 2189 2190 if (ata_read_log_directory(dev)) 2191 return 0; 2192 2193 return get_unaligned_le16(&dev->gp_log_dir[log * 2]); 2194 } 2195 2196 static bool ata_identify_page_supported(struct ata_device *dev, u8 page) 2197 { 2198 unsigned int err, i; 2199 2200 if (dev->quirks & ATA_QUIRK_NO_ID_DEV_LOG) 2201 return false; 2202 2203 if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE)) { 2204 /* 2205 * IDENTIFY DEVICE data log is defined as mandatory starting 2206 * with ACS-3 (ATA version 10). Warn about the missing log 2207 * for drives which implement this ATA level or above. 2208 */ 2209 if (ata_id_major_version(dev->id) >= 10) 2210 ata_dev_warn(dev, 2211 "ATA Identify Device Log not supported\n"); 2212 dev->quirks |= ATA_QUIRK_NO_ID_DEV_LOG; 2213 return false; 2214 } 2215 2216 /* 2217 * Read IDENTIFY DEVICE data log, page 0, to figure out if the page is 2218 * supported. 2219 */ 2220 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 0, 2221 dev->sector_buf, 1); 2222 if (err) 2223 return false; 2224 2225 for (i = 0; i < dev->sector_buf[8]; i++) { 2226 if (dev->sector_buf[9 + i] == page) 2227 return true; 2228 } 2229 2230 return false; 2231 } 2232 2233 static int ata_do_link_spd_quirk(struct ata_device *dev) 2234 { 2235 struct ata_link *plink = ata_dev_phys_link(dev); 2236 u32 target, target_limit; 2237 2238 if (!sata_scr_valid(plink)) 2239 return 0; 2240 2241 if (dev->quirks & ATA_QUIRK_1_5_GBPS) 2242 target = 1; 2243 else 2244 return 0; 2245 2246 target_limit = (1 << target) - 1; 2247 2248 /* if already on stricter limit, no need to push further */ 2249 if (plink->sata_spd_limit <= target_limit) 2250 return 0; 2251 2252 plink->sata_spd_limit = target_limit; 2253 2254 /* Request another EH round by returning -EAGAIN if link is 2255 * going faster than the target speed. Forward progress is 2256 * guaranteed by setting sata_spd_limit to target_limit above. 2257 */ 2258 if (plink->sata_spd > target) { 2259 ata_dev_info(dev, "applying link speed limit quirk to %s\n", 2260 sata_spd_string(target)); 2261 return -EAGAIN; 2262 } 2263 return 0; 2264 } 2265 2266 static inline bool ata_dev_knobble(struct ata_device *dev) 2267 { 2268 struct ata_port *ap = dev->link->ap; 2269 2270 if (ata_dev_quirks(dev) & ATA_QUIRK_BRIDGE_OK) 2271 return false; 2272 2273 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); 2274 } 2275 2276 static void ata_dev_config_ncq_send_recv(struct ata_device *dev) 2277 { 2278 unsigned int err_mask; 2279 2280 if (!ata_log_supported(dev, ATA_LOG_NCQ_SEND_RECV)) { 2281 ata_dev_warn(dev, "NCQ Send/Recv Log not supported\n"); 2282 return; 2283 } 2284 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_SEND_RECV, 2285 0, dev->sector_buf, 1); 2286 if (!err_mask) { 2287 u8 *cmds = dev->ncq_send_recv_cmds; 2288 2289 dev->flags |= ATA_DFLAG_NCQ_SEND_RECV; 2290 memcpy(cmds, dev->sector_buf, ATA_LOG_NCQ_SEND_RECV_SIZE); 2291 2292 if (dev->quirks & ATA_QUIRK_NO_NCQ_TRIM) { 2293 ata_dev_dbg(dev, "disabling queued TRIM support\n"); 2294 cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &= 2295 ~ATA_LOG_NCQ_SEND_RECV_DSM_TRIM; 2296 } 2297 } 2298 } 2299 2300 static void ata_dev_config_ncq_non_data(struct ata_device *dev) 2301 { 2302 unsigned int err_mask; 2303 2304 if (!ata_log_supported(dev, ATA_LOG_NCQ_NON_DATA)) { 2305 ata_dev_warn(dev, 2306 "NCQ Non-Data Log not supported\n"); 2307 return; 2308 } 2309 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_NON_DATA, 2310 0, dev->sector_buf, 1); 2311 if (!err_mask) 2312 memcpy(dev->ncq_non_data_cmds, dev->sector_buf, 2313 ATA_LOG_NCQ_NON_DATA_SIZE); 2314 } 2315 2316 static void ata_dev_config_ncq_prio(struct ata_device *dev) 2317 { 2318 unsigned int err_mask; 2319 2320 if (!ata_identify_page_supported(dev, ATA_LOG_SATA_SETTINGS)) 2321 return; 2322 2323 err_mask = ata_read_log_page(dev, 2324 ATA_LOG_IDENTIFY_DEVICE, 2325 ATA_LOG_SATA_SETTINGS, 2326 dev->sector_buf, 1); 2327 if (err_mask) 2328 goto not_supported; 2329 2330 if (!(dev->sector_buf[ATA_LOG_NCQ_PRIO_OFFSET] & BIT(3))) 2331 goto not_supported; 2332 2333 dev->flags |= ATA_DFLAG_NCQ_PRIO; 2334 2335 return; 2336 2337 not_supported: 2338 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLED; 2339 dev->flags &= ~ATA_DFLAG_NCQ_PRIO; 2340 } 2341 2342 static bool ata_dev_check_adapter(struct ata_device *dev, 2343 unsigned short vendor_id) 2344 { 2345 struct pci_dev *pcidev = NULL; 2346 struct device *parent_dev = NULL; 2347 2348 for (parent_dev = dev->tdev.parent; parent_dev != NULL; 2349 parent_dev = parent_dev->parent) { 2350 if (dev_is_pci(parent_dev)) { 2351 pcidev = to_pci_dev(parent_dev); 2352 if (pcidev->vendor == vendor_id) 2353 return true; 2354 break; 2355 } 2356 } 2357 2358 return false; 2359 } 2360 2361 static int ata_dev_config_ncq(struct ata_device *dev, 2362 char *desc, size_t desc_sz) 2363 { 2364 struct ata_port *ap = dev->link->ap; 2365 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); 2366 unsigned int err_mask; 2367 char *aa_desc = ""; 2368 2369 if (!ata_id_has_ncq(dev->id)) { 2370 desc[0] = '\0'; 2371 return 0; 2372 } 2373 if (!IS_ENABLED(CONFIG_SATA_HOST)) 2374 return 0; 2375 if (dev->quirks & ATA_QUIRK_NONCQ) { 2376 snprintf(desc, desc_sz, "NCQ (not used)"); 2377 return 0; 2378 } 2379 2380 if (dev->quirks & ATA_QUIRK_NO_NCQ_ON_ATI && 2381 ata_dev_check_adapter(dev, PCI_VENDOR_ID_ATI)) { 2382 snprintf(desc, desc_sz, "NCQ (not used)"); 2383 return 0; 2384 } 2385 2386 if (ap->flags & ATA_FLAG_NCQ) { 2387 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE); 2388 dev->flags |= ATA_DFLAG_NCQ; 2389 } 2390 2391 if (!(dev->quirks & ATA_QUIRK_BROKEN_FPDMA_AA) && 2392 (ap->flags & ATA_FLAG_FPDMA_AA) && 2393 ata_id_has_fpdma_aa(dev->id)) { 2394 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE, 2395 SATA_FPDMA_AA); 2396 if (err_mask) { 2397 ata_dev_err(dev, 2398 "failed to enable AA (error_mask=0x%x)\n", 2399 err_mask); 2400 if (err_mask != AC_ERR_DEV) { 2401 dev->quirks |= ATA_QUIRK_BROKEN_FPDMA_AA; 2402 return -EIO; 2403 } 2404 } else 2405 aa_desc = ", AA"; 2406 } 2407 2408 if (hdepth >= ddepth) 2409 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc); 2410 else 2411 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth, 2412 ddepth, aa_desc); 2413 2414 if ((ap->flags & ATA_FLAG_FPDMA_AUX)) { 2415 if (ata_id_has_ncq_send_and_recv(dev->id)) 2416 ata_dev_config_ncq_send_recv(dev); 2417 if (ata_id_has_ncq_non_data(dev->id)) 2418 ata_dev_config_ncq_non_data(dev); 2419 if (ata_id_has_ncq_prio(dev->id)) 2420 ata_dev_config_ncq_prio(dev); 2421 } 2422 2423 return 0; 2424 } 2425 2426 static void ata_dev_config_sense_reporting(struct ata_device *dev) 2427 { 2428 unsigned int err_mask; 2429 2430 if (!ata_id_has_sense_reporting(dev->id)) 2431 return; 2432 2433 if (ata_id_sense_reporting_enabled(dev->id)) 2434 return; 2435 2436 err_mask = ata_dev_set_feature(dev, SETFEATURE_SENSE_DATA, 0x1); 2437 if (err_mask) { 2438 ata_dev_dbg(dev, 2439 "failed to enable Sense Data Reporting, Emask 0x%x\n", 2440 err_mask); 2441 } 2442 } 2443 2444 static void ata_dev_config_zac(struct ata_device *dev) 2445 { 2446 unsigned int err_mask; 2447 u8 *identify_buf = dev->sector_buf; 2448 2449 dev->zac_zones_optimal_open = U32_MAX; 2450 dev->zac_zones_optimal_nonseq = U32_MAX; 2451 dev->zac_zones_max_open = U32_MAX; 2452 2453 if (!ata_dev_is_zac(dev)) 2454 return; 2455 2456 if (!ata_identify_page_supported(dev, ATA_LOG_ZONED_INFORMATION)) { 2457 ata_dev_warn(dev, 2458 "ATA Zoned Information Log not supported\n"); 2459 return; 2460 } 2461 2462 /* 2463 * Read IDENTIFY DEVICE data log, page 9 (Zoned-device information) 2464 */ 2465 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 2466 ATA_LOG_ZONED_INFORMATION, 2467 identify_buf, 1); 2468 if (!err_mask) { 2469 u64 zoned_cap, opt_open, opt_nonseq, max_open; 2470 2471 zoned_cap = get_unaligned_le64(&identify_buf[8]); 2472 if ((zoned_cap >> 63)) 2473 dev->zac_zoned_cap = (zoned_cap & 1); 2474 opt_open = get_unaligned_le64(&identify_buf[24]); 2475 if ((opt_open >> 63)) 2476 dev->zac_zones_optimal_open = (u32)opt_open; 2477 opt_nonseq = get_unaligned_le64(&identify_buf[32]); 2478 if ((opt_nonseq >> 63)) 2479 dev->zac_zones_optimal_nonseq = (u32)opt_nonseq; 2480 max_open = get_unaligned_le64(&identify_buf[40]); 2481 if ((max_open >> 63)) 2482 dev->zac_zones_max_open = (u32)max_open; 2483 } 2484 } 2485 2486 static void ata_dev_config_trusted(struct ata_device *dev) 2487 { 2488 u64 trusted_cap; 2489 unsigned int err; 2490 2491 if (!ata_id_has_trusted(dev->id)) 2492 return; 2493 2494 if (!ata_identify_page_supported(dev, ATA_LOG_SECURITY)) { 2495 ata_dev_warn(dev, 2496 "Security Log not supported\n"); 2497 return; 2498 } 2499 2500 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, ATA_LOG_SECURITY, 2501 dev->sector_buf, 1); 2502 if (err) 2503 return; 2504 2505 trusted_cap = get_unaligned_le64(&dev->sector_buf[40]); 2506 if (!(trusted_cap & (1ULL << 63))) { 2507 ata_dev_dbg(dev, 2508 "Trusted Computing capability qword not valid!\n"); 2509 return; 2510 } 2511 2512 if (trusted_cap & (1 << 0)) 2513 dev->flags |= ATA_DFLAG_TRUSTED; 2514 } 2515 2516 static void ata_dev_cleanup_cdl_resources(struct ata_device *dev) 2517 { 2518 kfree(dev->cdl); 2519 dev->cdl = NULL; 2520 } 2521 2522 static int ata_dev_init_cdl_resources(struct ata_device *dev) 2523 { 2524 struct ata_cdl *cdl = dev->cdl; 2525 unsigned int err_mask; 2526 2527 if (!cdl) { 2528 cdl = kzalloc(sizeof(*cdl), GFP_KERNEL); 2529 if (!cdl) 2530 return -ENOMEM; 2531 dev->cdl = cdl; 2532 } 2533 2534 err_mask = ata_read_log_page(dev, ATA_LOG_CDL, 0, cdl->desc_log_buf, 2535 ATA_LOG_CDL_SIZE / ATA_SECT_SIZE); 2536 if (err_mask) { 2537 ata_dev_warn(dev, "Read Command Duration Limits log failed\n"); 2538 ata_dev_cleanup_cdl_resources(dev); 2539 return -EIO; 2540 } 2541 2542 return 0; 2543 } 2544 2545 static void ata_dev_config_cdl(struct ata_device *dev) 2546 { 2547 unsigned int err_mask; 2548 bool cdl_enabled; 2549 u64 val; 2550 int ret; 2551 2552 if (ata_id_major_version(dev->id) < 11) 2553 goto not_supported; 2554 2555 if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE) || 2556 !ata_identify_page_supported(dev, ATA_LOG_SUPPORTED_CAPABILITIES) || 2557 !ata_identify_page_supported(dev, ATA_LOG_CURRENT_SETTINGS)) 2558 goto not_supported; 2559 2560 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 2561 ATA_LOG_SUPPORTED_CAPABILITIES, 2562 dev->sector_buf, 1); 2563 if (err_mask) 2564 goto not_supported; 2565 2566 /* Check Command Duration Limit Supported bits */ 2567 val = get_unaligned_le64(&dev->sector_buf[168]); 2568 if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(0))) 2569 goto not_supported; 2570 2571 /* Warn the user if command duration guideline is not supported */ 2572 if (!(val & BIT_ULL(1))) 2573 ata_dev_warn(dev, 2574 "Command duration guideline is not supported\n"); 2575 2576 /* 2577 * We must have support for the sense data for successful NCQ commands 2578 * log indicated by the successful NCQ command sense data supported bit. 2579 */ 2580 val = get_unaligned_le64(&dev->sector_buf[8]); 2581 if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(47))) { 2582 ata_dev_warn(dev, 2583 "CDL supported but Successful NCQ Command Sense Data is not supported\n"); 2584 goto not_supported; 2585 } 2586 2587 /* Without NCQ autosense, the successful NCQ commands log is useless. */ 2588 if (!ata_id_has_ncq_autosense(dev->id)) { 2589 ata_dev_warn(dev, 2590 "CDL supported but NCQ autosense is not supported\n"); 2591 goto not_supported; 2592 } 2593 2594 /* 2595 * If CDL is marked as enabled, make sure the feature is enabled too. 2596 * Conversely, if CDL is disabled, make sure the feature is turned off. 2597 */ 2598 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 2599 ATA_LOG_CURRENT_SETTINGS, 2600 dev->sector_buf, 1); 2601 if (err_mask) 2602 goto not_supported; 2603 2604 val = get_unaligned_le64(&dev->sector_buf[8]); 2605 cdl_enabled = val & BIT_ULL(63) && val & BIT_ULL(21); 2606 if (dev->flags & ATA_DFLAG_CDL_ENABLED) { 2607 if (!cdl_enabled) { 2608 /* Enable CDL on the device */ 2609 err_mask = ata_dev_set_feature(dev, SETFEATURES_CDL, 1); 2610 if (err_mask) { 2611 ata_dev_err(dev, 2612 "Enable CDL feature failed\n"); 2613 goto not_supported; 2614 } 2615 } 2616 } else { 2617 if (cdl_enabled) { 2618 /* Disable CDL on the device */ 2619 err_mask = ata_dev_set_feature(dev, SETFEATURES_CDL, 0); 2620 if (err_mask) { 2621 ata_dev_err(dev, 2622 "Disable CDL feature failed\n"); 2623 goto not_supported; 2624 } 2625 } 2626 } 2627 2628 /* 2629 * While CDL itself has to be enabled using sysfs, CDL requires that 2630 * sense data for successful NCQ commands is enabled to work properly. 2631 * Just like ata_dev_config_sense_reporting(), enable it unconditionally 2632 * if supported. 2633 */ 2634 if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(18))) { 2635 err_mask = ata_dev_set_feature(dev, 2636 SETFEATURE_SENSE_DATA_SUCC_NCQ, 0x1); 2637 if (err_mask) { 2638 ata_dev_warn(dev, 2639 "failed to enable Sense Data for successful NCQ commands, Emask 0x%x\n", 2640 err_mask); 2641 goto not_supported; 2642 } 2643 } 2644 2645 /* CDL is supported: allocate and initialize needed resources. */ 2646 ret = ata_dev_init_cdl_resources(dev); 2647 if (ret) { 2648 ata_dev_warn(dev, "Initialize CDL resources failed\n"); 2649 goto not_supported; 2650 } 2651 2652 dev->flags |= ATA_DFLAG_CDL; 2653 2654 return; 2655 2656 not_supported: 2657 dev->flags &= ~(ATA_DFLAG_CDL | ATA_DFLAG_CDL_ENABLED); 2658 ata_dev_cleanup_cdl_resources(dev); 2659 } 2660 2661 static int ata_dev_config_lba(struct ata_device *dev) 2662 { 2663 const u16 *id = dev->id; 2664 const char *lba_desc; 2665 char ncq_desc[32]; 2666 int ret; 2667 2668 dev->flags |= ATA_DFLAG_LBA; 2669 2670 if (ata_id_has_lba48(id)) { 2671 lba_desc = "LBA48"; 2672 dev->flags |= ATA_DFLAG_LBA48; 2673 if (dev->n_sectors >= (1UL << 28) && 2674 ata_id_has_flush_ext(id)) 2675 dev->flags |= ATA_DFLAG_FLUSH_EXT; 2676 } else { 2677 lba_desc = "LBA"; 2678 } 2679 2680 /* config NCQ */ 2681 ret = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); 2682 2683 /* print device info to dmesg */ 2684 if (ata_dev_print_info(dev)) 2685 ata_dev_info(dev, 2686 "%llu sectors, multi %u: %s %s\n", 2687 (unsigned long long)dev->n_sectors, 2688 dev->multi_count, lba_desc, ncq_desc); 2689 2690 return ret; 2691 } 2692 2693 static void ata_dev_config_chs(struct ata_device *dev) 2694 { 2695 const u16 *id = dev->id; 2696 2697 if (ata_id_current_chs_valid(id)) { 2698 /* Current CHS translation is valid. */ 2699 dev->cylinders = id[54]; 2700 dev->heads = id[55]; 2701 dev->sectors = id[56]; 2702 } else { 2703 /* Default translation */ 2704 dev->cylinders = id[1]; 2705 dev->heads = id[3]; 2706 dev->sectors = id[6]; 2707 } 2708 2709 /* print device info to dmesg */ 2710 if (ata_dev_print_info(dev)) 2711 ata_dev_info(dev, 2712 "%llu sectors, multi %u, CHS %u/%u/%u\n", 2713 (unsigned long long)dev->n_sectors, 2714 dev->multi_count, dev->cylinders, 2715 dev->heads, dev->sectors); 2716 } 2717 2718 static void ata_dev_config_fua(struct ata_device *dev) 2719 { 2720 /* Ignore FUA support if its use is disabled globally */ 2721 if (!libata_fua) 2722 goto nofua; 2723 2724 /* Ignore devices without support for WRITE DMA FUA EXT */ 2725 if (!(dev->flags & ATA_DFLAG_LBA48) || !ata_id_has_fua(dev->id)) 2726 goto nofua; 2727 2728 /* Ignore known bad devices and devices that lack NCQ support */ 2729 if (!ata_ncq_supported(dev) || (dev->quirks & ATA_QUIRK_NO_FUA)) 2730 goto nofua; 2731 2732 dev->flags |= ATA_DFLAG_FUA; 2733 2734 return; 2735 2736 nofua: 2737 dev->flags &= ~ATA_DFLAG_FUA; 2738 } 2739 2740 static void ata_dev_config_devslp(struct ata_device *dev) 2741 { 2742 u8 *sata_setting = dev->sector_buf; 2743 unsigned int err_mask; 2744 int i, j; 2745 2746 /* 2747 * Check device sleep capability. Get DevSlp timing variables 2748 * from SATA Settings page of Identify Device Data Log. 2749 */ 2750 if (!ata_id_has_devslp(dev->id) || 2751 !ata_identify_page_supported(dev, ATA_LOG_SATA_SETTINGS)) 2752 return; 2753 2754 err_mask = ata_read_log_page(dev, 2755 ATA_LOG_IDENTIFY_DEVICE, 2756 ATA_LOG_SATA_SETTINGS, 2757 sata_setting, 1); 2758 if (err_mask) 2759 return; 2760 2761 dev->flags |= ATA_DFLAG_DEVSLP; 2762 for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) { 2763 j = ATA_LOG_DEVSLP_OFFSET + i; 2764 dev->devslp_timing[i] = sata_setting[j]; 2765 } 2766 } 2767 2768 static void ata_dev_config_cpr(struct ata_device *dev) 2769 { 2770 unsigned int err_mask; 2771 size_t buf_len; 2772 int i, nr_cpr = 0; 2773 struct ata_cpr_log *cpr_log = NULL; 2774 u8 *desc, *buf = NULL; 2775 2776 if (ata_id_major_version(dev->id) < 11) 2777 goto out; 2778 2779 buf_len = ata_log_supported(dev, ATA_LOG_CONCURRENT_POSITIONING_RANGES); 2780 if (buf_len == 0) 2781 goto out; 2782 2783 /* 2784 * Read the concurrent positioning ranges log (0x47). We can have at 2785 * most 255 32B range descriptors plus a 64B header. This log varies in 2786 * size, so use the size reported in the GPL directory. Reading beyond 2787 * the supported length will result in an error. 2788 */ 2789 buf_len <<= 9; 2790 buf = kzalloc(buf_len, GFP_KERNEL); 2791 if (!buf) 2792 goto out; 2793 2794 err_mask = ata_read_log_page(dev, ATA_LOG_CONCURRENT_POSITIONING_RANGES, 2795 0, buf, buf_len >> 9); 2796 if (err_mask) 2797 goto out; 2798 2799 nr_cpr = buf[0]; 2800 if (!nr_cpr) 2801 goto out; 2802 2803 cpr_log = kzalloc(struct_size(cpr_log, cpr, nr_cpr), GFP_KERNEL); 2804 if (!cpr_log) 2805 goto out; 2806 2807 cpr_log->nr_cpr = nr_cpr; 2808 desc = &buf[64]; 2809 for (i = 0; i < nr_cpr; i++, desc += 32) { 2810 cpr_log->cpr[i].num = desc[0]; 2811 cpr_log->cpr[i].num_storage_elements = desc[1]; 2812 cpr_log->cpr[i].start_lba = get_unaligned_le64(&desc[8]); 2813 cpr_log->cpr[i].num_lbas = get_unaligned_le64(&desc[16]); 2814 } 2815 2816 out: 2817 swap(dev->cpr_log, cpr_log); 2818 kfree(cpr_log); 2819 kfree(buf); 2820 } 2821 2822 /* 2823 * Configure features related to link power management. 2824 */ 2825 static void ata_dev_config_lpm(struct ata_device *dev) 2826 { 2827 struct ata_port *ap = dev->link->ap; 2828 unsigned int err_mask; 2829 2830 if (ap->flags & ATA_FLAG_NO_LPM) { 2831 /* 2832 * When the port does not support LPM, we cannot support it on 2833 * the device either. 2834 */ 2835 dev->quirks |= ATA_QUIRK_NOLPM; 2836 } else { 2837 /* 2838 * Some WD SATA-1 drives have issues with LPM, turn on NOLPM for 2839 * them. 2840 */ 2841 if ((dev->quirks & ATA_QUIRK_WD_BROKEN_LPM) && 2842 (dev->id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2) 2843 dev->quirks |= ATA_QUIRK_NOLPM; 2844 2845 /* ATI specific quirk */ 2846 if ((dev->quirks & ATA_QUIRK_NO_LPM_ON_ATI) && 2847 ata_dev_check_adapter(dev, PCI_VENDOR_ID_ATI)) 2848 dev->quirks |= ATA_QUIRK_NOLPM; 2849 } 2850 2851 if (dev->quirks & ATA_QUIRK_NOLPM && 2852 ap->target_lpm_policy != ATA_LPM_MAX_POWER) { 2853 ata_dev_warn(dev, "LPM support broken, forcing max_power\n"); 2854 ap->target_lpm_policy = ATA_LPM_MAX_POWER; 2855 } 2856 2857 /* 2858 * Device Initiated Power Management (DIPM) is normally disabled by 2859 * default on a device. However, DIPM may have been enabled and that 2860 * setting kept even after COMRESET because of the Software Settings 2861 * Preservation feature. So if the port does not support DIPM and the 2862 * device does, disable DIPM on the device. 2863 */ 2864 if (ap->flags & ATA_FLAG_NO_DIPM && ata_id_has_dipm(dev->id)) { 2865 err_mask = ata_dev_set_feature(dev, 2866 SETFEATURES_SATA_DISABLE, SATA_DIPM); 2867 if (err_mask && err_mask != AC_ERR_DEV) 2868 ata_dev_err(dev, "Disable DIPM failed, Emask 0x%x\n", 2869 err_mask); 2870 } 2871 } 2872 2873 static void ata_dev_print_features(struct ata_device *dev) 2874 { 2875 if (!(dev->flags & ATA_DFLAG_FEATURES_MASK)) 2876 return; 2877 2878 ata_dev_info(dev, 2879 "Features:%s%s%s%s%s%s%s%s%s%s\n", 2880 dev->flags & ATA_DFLAG_FUA ? " FUA" : "", 2881 dev->flags & ATA_DFLAG_TRUSTED ? " Trust" : "", 2882 dev->flags & ATA_DFLAG_DA ? " Dev-Attention" : "", 2883 dev->flags & ATA_DFLAG_DEVSLP ? " Dev-Sleep" : "", 2884 ata_id_has_hipm(dev->id) ? " HIPM" : "", 2885 ata_id_has_dipm(dev->id) ? " DIPM" : "", 2886 dev->flags & ATA_DFLAG_NCQ_SEND_RECV ? " NCQ-sndrcv" : "", 2887 dev->flags & ATA_DFLAG_NCQ_PRIO ? " NCQ-prio" : "", 2888 dev->flags & ATA_DFLAG_CDL ? " CDL" : "", 2889 dev->cpr_log ? " CPR" : ""); 2890 } 2891 2892 /** 2893 * ata_dev_configure - Configure the specified ATA/ATAPI device 2894 * @dev: Target device to configure 2895 * 2896 * Configure @dev according to @dev->id. Generic and low-level 2897 * driver specific fixups are also applied. 2898 * 2899 * LOCKING: 2900 * Kernel thread context (may sleep) 2901 * 2902 * RETURNS: 2903 * 0 on success, -errno otherwise 2904 */ 2905 int ata_dev_configure(struct ata_device *dev) 2906 { 2907 struct ata_port *ap = dev->link->ap; 2908 bool print_info = ata_dev_print_info(dev); 2909 const u16 *id = dev->id; 2910 unsigned int xfer_mask; 2911 unsigned int err_mask; 2912 char revbuf[7]; /* XYZ-99\0 */ 2913 char fwrevbuf[ATA_ID_FW_REV_LEN+1]; 2914 char modelbuf[ATA_ID_PROD_LEN+1]; 2915 int rc; 2916 2917 if (!ata_dev_enabled(dev)) { 2918 ata_dev_dbg(dev, "no device\n"); 2919 return 0; 2920 } 2921 2922 /* Clear the general purpose log directory cache. */ 2923 ata_clear_log_directory(dev); 2924 2925 /* Set quirks */ 2926 dev->quirks |= ata_dev_quirks(dev); 2927 ata_force_quirks(dev); 2928 2929 if (dev->quirks & ATA_QUIRK_DISABLE) { 2930 ata_dev_info(dev, "unsupported device, disabling\n"); 2931 ata_dev_disable(dev); 2932 return 0; 2933 } 2934 2935 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) && 2936 dev->class == ATA_DEV_ATAPI) { 2937 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n", 2938 atapi_enabled ? "not supported with this driver" 2939 : "disabled"); 2940 ata_dev_disable(dev); 2941 return 0; 2942 } 2943 2944 rc = ata_do_link_spd_quirk(dev); 2945 if (rc) 2946 return rc; 2947 2948 /* let ACPI work its magic */ 2949 rc = ata_acpi_on_devcfg(dev); 2950 if (rc) 2951 return rc; 2952 2953 /* massage HPA, do it early as it might change IDENTIFY data */ 2954 rc = ata_hpa_resize(dev); 2955 if (rc) 2956 return rc; 2957 2958 /* print device capabilities */ 2959 ata_dev_dbg(dev, 2960 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " 2961 "85:%04x 86:%04x 87:%04x 88:%04x\n", 2962 __func__, 2963 id[49], id[82], id[83], id[84], 2964 id[85], id[86], id[87], id[88]); 2965 2966 /* initialize to-be-configured parameters */ 2967 dev->flags &= ~ATA_DFLAG_CFG_MASK; 2968 dev->max_sectors = 0; 2969 dev->cdb_len = 0; 2970 dev->n_sectors = 0; 2971 dev->cylinders = 0; 2972 dev->heads = 0; 2973 dev->sectors = 0; 2974 dev->multi_count = 0; 2975 2976 /* 2977 * common ATA, ATAPI feature tests 2978 */ 2979 2980 /* find max transfer mode; for printk only */ 2981 xfer_mask = ata_id_xfermask(id); 2982 2983 ata_dump_id(dev, id); 2984 2985 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ 2986 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, 2987 sizeof(fwrevbuf)); 2988 2989 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, 2990 sizeof(modelbuf)); 2991 2992 /* ATA-specific feature tests */ 2993 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 2994 if (ata_id_is_cfa(id)) { 2995 /* CPRM may make this media unusable */ 2996 if (id[ATA_ID_CFA_KEY_MGMT] & 1) 2997 ata_dev_warn(dev, 2998 "supports DRM functions and may not be fully accessible\n"); 2999 snprintf(revbuf, 7, "CFA"); 3000 } else { 3001 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); 3002 /* Warn the user if the device has TPM extensions */ 3003 if (ata_id_has_tpm(id)) 3004 ata_dev_warn(dev, 3005 "supports DRM functions and may not be fully accessible\n"); 3006 } 3007 3008 dev->n_sectors = ata_id_n_sectors(id); 3009 if (ata_id_is_locked(id)) { 3010 /* 3011 * If Security locked, set capacity to zero to prevent 3012 * any I/O, e.g. partition scanning, as any I/O to a 3013 * locked drive will result in user visible errors. 3014 */ 3015 ata_dev_info(dev, 3016 "Security locked, setting capacity to zero\n"); 3017 dev->n_sectors = 0; 3018 } 3019 3020 /* get current R/W Multiple count setting */ 3021 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) { 3022 unsigned int max = dev->id[47] & 0xff; 3023 unsigned int cnt = dev->id[59] & 0xff; 3024 /* only recognize/allow powers of two here */ 3025 if (is_power_of_2(max) && is_power_of_2(cnt)) 3026 if (cnt <= max) 3027 dev->multi_count = cnt; 3028 } 3029 3030 /* print device info to dmesg */ 3031 if (print_info) 3032 ata_dev_info(dev, "%s: %s, %s, max %s\n", 3033 revbuf, modelbuf, fwrevbuf, 3034 ata_mode_string(xfer_mask)); 3035 3036 if (ata_id_has_lba(id)) { 3037 rc = ata_dev_config_lba(dev); 3038 if (rc) 3039 return rc; 3040 } else { 3041 ata_dev_config_chs(dev); 3042 } 3043 3044 ata_dev_config_lpm(dev); 3045 ata_dev_config_fua(dev); 3046 ata_dev_config_devslp(dev); 3047 ata_dev_config_sense_reporting(dev); 3048 ata_dev_config_zac(dev); 3049 ata_dev_config_trusted(dev); 3050 ata_dev_config_cpr(dev); 3051 ata_dev_config_cdl(dev); 3052 dev->cdb_len = 32; 3053 3054 if (print_info) 3055 ata_dev_print_features(dev); 3056 } 3057 3058 /* ATAPI-specific feature tests */ 3059 else if (dev->class == ATA_DEV_ATAPI) { 3060 const char *cdb_intr_string = ""; 3061 const char *atapi_an_string = ""; 3062 const char *dma_dir_string = ""; 3063 u32 sntf; 3064 3065 rc = atapi_cdb_len(id); 3066 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { 3067 ata_dev_warn(dev, "unsupported CDB len %d\n", rc); 3068 rc = -EINVAL; 3069 goto err_out_nosup; 3070 } 3071 dev->cdb_len = (unsigned int) rc; 3072 3073 /* Enable ATAPI AN if both the host and device have 3074 * the support. If PMP is attached, SNTF is required 3075 * to enable ATAPI AN to discern between PHY status 3076 * changed notifications and ATAPI ANs. 3077 */ 3078 if (atapi_an && 3079 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && 3080 (!sata_pmp_attached(ap) || 3081 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { 3082 /* issue SET feature command to turn this on */ 3083 err_mask = ata_dev_set_feature(dev, 3084 SETFEATURES_SATA_ENABLE, SATA_AN); 3085 if (err_mask) 3086 ata_dev_err(dev, 3087 "failed to enable ATAPI AN (err_mask=0x%x)\n", 3088 err_mask); 3089 else { 3090 dev->flags |= ATA_DFLAG_AN; 3091 atapi_an_string = ", ATAPI AN"; 3092 } 3093 } 3094 3095 if (ata_id_cdb_intr(dev->id)) { 3096 dev->flags |= ATA_DFLAG_CDB_INTR; 3097 cdb_intr_string = ", CDB intr"; 3098 } 3099 3100 if (atapi_dmadir || (dev->quirks & ATA_QUIRK_ATAPI_DMADIR) || 3101 atapi_id_dmadir(dev->id)) { 3102 dev->flags |= ATA_DFLAG_DMADIR; 3103 dma_dir_string = ", DMADIR"; 3104 } 3105 3106 if (ata_id_has_da(dev->id)) { 3107 dev->flags |= ATA_DFLAG_DA; 3108 zpodd_init(dev); 3109 } 3110 3111 /* print device info to dmesg */ 3112 if (print_info) 3113 ata_dev_info(dev, 3114 "ATAPI: %s, %s, max %s%s%s%s\n", 3115 modelbuf, fwrevbuf, 3116 ata_mode_string(xfer_mask), 3117 cdb_intr_string, atapi_an_string, 3118 dma_dir_string); 3119 } 3120 3121 /* determine max_sectors */ 3122 dev->max_sectors = ATA_MAX_SECTORS; 3123 if (dev->flags & ATA_DFLAG_LBA48) 3124 dev->max_sectors = ATA_MAX_SECTORS_LBA48; 3125 3126 /* Limit PATA drive on SATA cable bridge transfers to udma5, 3127 200 sectors */ 3128 if (ata_dev_knobble(dev)) { 3129 if (print_info) 3130 ata_dev_info(dev, "applying bridge limits\n"); 3131 dev->udma_mask &= ATA_UDMA5; 3132 dev->max_sectors = ATA_MAX_SECTORS; 3133 } 3134 3135 if ((dev->class == ATA_DEV_ATAPI) && 3136 (atapi_command_packet_set(id) == TYPE_TAPE)) { 3137 dev->max_sectors = ATA_MAX_SECTORS_TAPE; 3138 dev->quirks |= ATA_QUIRK_STUCK_ERR; 3139 } 3140 3141 if (dev->quirks & ATA_QUIRK_MAX_SEC_128) 3142 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, 3143 dev->max_sectors); 3144 3145 if (dev->quirks & ATA_QUIRK_MAX_SEC_1024) 3146 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_1024, 3147 dev->max_sectors); 3148 3149 if (dev->quirks & ATA_QUIRK_MAX_SEC_8191) 3150 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_8191, 3151 dev->max_sectors); 3152 3153 if (dev->quirks & ATA_QUIRK_MAX_SEC_LBA48) 3154 dev->max_sectors = ATA_MAX_SECTORS_LBA48; 3155 3156 if (ap->ops->dev_config) 3157 ap->ops->dev_config(dev); 3158 3159 if (dev->quirks & ATA_QUIRK_DIAGNOSTIC) { 3160 /* Let the user know. We don't want to disallow opens for 3161 rescue purposes, or in case the vendor is just a blithering 3162 idiot. Do this after the dev_config call as some controllers 3163 with buggy firmware may want to avoid reporting false device 3164 bugs */ 3165 3166 if (print_info) { 3167 ata_dev_warn(dev, 3168 "Drive reports diagnostics failure. This may indicate a drive\n"); 3169 ata_dev_warn(dev, 3170 "fault or invalid emulation. Contact drive vendor for information.\n"); 3171 } 3172 } 3173 3174 if ((dev->quirks & ATA_QUIRK_FIRMWARE_WARN) && print_info) { 3175 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n"); 3176 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n"); 3177 } 3178 3179 return 0; 3180 3181 err_out_nosup: 3182 return rc; 3183 } 3184 3185 /** 3186 * ata_cable_40wire - return 40 wire cable type 3187 * @ap: port 3188 * 3189 * Helper method for drivers which want to hardwire 40 wire cable 3190 * detection. 3191 */ 3192 3193 int ata_cable_40wire(struct ata_port *ap) 3194 { 3195 return ATA_CBL_PATA40; 3196 } 3197 EXPORT_SYMBOL_GPL(ata_cable_40wire); 3198 3199 /** 3200 * ata_cable_80wire - return 80 wire cable type 3201 * @ap: port 3202 * 3203 * Helper method for drivers which want to hardwire 80 wire cable 3204 * detection. 3205 */ 3206 3207 int ata_cable_80wire(struct ata_port *ap) 3208 { 3209 return ATA_CBL_PATA80; 3210 } 3211 EXPORT_SYMBOL_GPL(ata_cable_80wire); 3212 3213 /** 3214 * ata_cable_unknown - return unknown PATA cable. 3215 * @ap: port 3216 * 3217 * Helper method for drivers which have no PATA cable detection. 3218 */ 3219 3220 int ata_cable_unknown(struct ata_port *ap) 3221 { 3222 return ATA_CBL_PATA_UNK; 3223 } 3224 EXPORT_SYMBOL_GPL(ata_cable_unknown); 3225 3226 /** 3227 * ata_cable_ignore - return ignored PATA cable. 3228 * @ap: port 3229 * 3230 * Helper method for drivers which don't use cable type to limit 3231 * transfer mode. 3232 */ 3233 int ata_cable_ignore(struct ata_port *ap) 3234 { 3235 return ATA_CBL_PATA_IGN; 3236 } 3237 EXPORT_SYMBOL_GPL(ata_cable_ignore); 3238 3239 /** 3240 * ata_cable_sata - return SATA cable type 3241 * @ap: port 3242 * 3243 * Helper method for drivers which have SATA cables 3244 */ 3245 3246 int ata_cable_sata(struct ata_port *ap) 3247 { 3248 return ATA_CBL_SATA; 3249 } 3250 EXPORT_SYMBOL_GPL(ata_cable_sata); 3251 3252 /** 3253 * sata_print_link_status - Print SATA link status 3254 * @link: SATA link to printk link status about 3255 * 3256 * This function prints link speed and status of a SATA link. 3257 * 3258 * LOCKING: 3259 * None. 3260 */ 3261 static void sata_print_link_status(struct ata_link *link) 3262 { 3263 u32 sstatus, scontrol, tmp; 3264 3265 if (sata_scr_read(link, SCR_STATUS, &sstatus)) 3266 return; 3267 if (sata_scr_read(link, SCR_CONTROL, &scontrol)) 3268 return; 3269 3270 if (ata_phys_link_online(link)) { 3271 tmp = (sstatus >> 4) & 0xf; 3272 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n", 3273 sata_spd_string(tmp), sstatus, scontrol); 3274 } else { 3275 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n", 3276 sstatus, scontrol); 3277 } 3278 } 3279 3280 /** 3281 * ata_dev_pair - return other device on cable 3282 * @adev: device 3283 * 3284 * Obtain the other device on the same cable, or if none is 3285 * present NULL is returned 3286 */ 3287 3288 struct ata_device *ata_dev_pair(struct ata_device *adev) 3289 { 3290 struct ata_link *link = adev->link; 3291 struct ata_device *pair = &link->device[1 - adev->devno]; 3292 if (!ata_dev_enabled(pair)) 3293 return NULL; 3294 return pair; 3295 } 3296 EXPORT_SYMBOL_GPL(ata_dev_pair); 3297 3298 #ifdef CONFIG_ATA_ACPI 3299 /** 3300 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration 3301 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine. 3302 * @cycle: cycle duration in ns 3303 * 3304 * Return matching xfer mode for @cycle. The returned mode is of 3305 * the transfer type specified by @xfer_shift. If @cycle is too 3306 * slow for @xfer_shift, 0xff is returned. If @cycle is faster 3307 * than the fastest known mode, the fasted mode is returned. 3308 * 3309 * LOCKING: 3310 * None. 3311 * 3312 * RETURNS: 3313 * Matching xfer_mode, 0xff if no match found. 3314 */ 3315 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle) 3316 { 3317 u8 base_mode = 0xff, last_mode = 0xff; 3318 const struct ata_xfer_ent *ent; 3319 const struct ata_timing *t; 3320 3321 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 3322 if (ent->shift == xfer_shift) 3323 base_mode = ent->base; 3324 3325 for (t = ata_timing_find_mode(base_mode); 3326 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) { 3327 unsigned short this_cycle; 3328 3329 switch (xfer_shift) { 3330 case ATA_SHIFT_PIO: 3331 case ATA_SHIFT_MWDMA: 3332 this_cycle = t->cycle; 3333 break; 3334 case ATA_SHIFT_UDMA: 3335 this_cycle = t->udma; 3336 break; 3337 default: 3338 return 0xff; 3339 } 3340 3341 if (cycle > this_cycle) 3342 break; 3343 3344 last_mode = t->mode; 3345 } 3346 3347 return last_mode; 3348 } 3349 #endif 3350 3351 /** 3352 * ata_down_xfermask_limit - adjust dev xfer masks downward 3353 * @dev: Device to adjust xfer masks 3354 * @sel: ATA_DNXFER_* selector 3355 * 3356 * Adjust xfer masks of @dev downward. Note that this function 3357 * does not apply the change. Invoking ata_set_mode() afterwards 3358 * will apply the limit. 3359 * 3360 * LOCKING: 3361 * Inherited from caller. 3362 * 3363 * RETURNS: 3364 * 0 on success, negative errno on failure 3365 */ 3366 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) 3367 { 3368 char buf[32]; 3369 unsigned int orig_mask, xfer_mask; 3370 unsigned int pio_mask, mwdma_mask, udma_mask; 3371 int quiet, highbit; 3372 3373 quiet = !!(sel & ATA_DNXFER_QUIET); 3374 sel &= ~ATA_DNXFER_QUIET; 3375 3376 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, 3377 dev->mwdma_mask, 3378 dev->udma_mask); 3379 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); 3380 3381 switch (sel) { 3382 case ATA_DNXFER_PIO: 3383 highbit = fls(pio_mask) - 1; 3384 pio_mask &= ~(1 << highbit); 3385 break; 3386 3387 case ATA_DNXFER_DMA: 3388 if (udma_mask) { 3389 highbit = fls(udma_mask) - 1; 3390 udma_mask &= ~(1 << highbit); 3391 if (!udma_mask) 3392 return -ENOENT; 3393 } else if (mwdma_mask) { 3394 highbit = fls(mwdma_mask) - 1; 3395 mwdma_mask &= ~(1 << highbit); 3396 if (!mwdma_mask) 3397 return -ENOENT; 3398 } 3399 break; 3400 3401 case ATA_DNXFER_40C: 3402 udma_mask &= ATA_UDMA_MASK_40C; 3403 break; 3404 3405 case ATA_DNXFER_FORCE_PIO0: 3406 pio_mask &= 1; 3407 fallthrough; 3408 case ATA_DNXFER_FORCE_PIO: 3409 mwdma_mask = 0; 3410 udma_mask = 0; 3411 break; 3412 3413 default: 3414 BUG(); 3415 } 3416 3417 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 3418 3419 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) 3420 return -ENOENT; 3421 3422 if (!quiet) { 3423 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) 3424 snprintf(buf, sizeof(buf), "%s:%s", 3425 ata_mode_string(xfer_mask), 3426 ata_mode_string(xfer_mask & ATA_MASK_PIO)); 3427 else 3428 snprintf(buf, sizeof(buf), "%s", 3429 ata_mode_string(xfer_mask)); 3430 3431 ata_dev_warn(dev, "limiting speed to %s\n", buf); 3432 } 3433 3434 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, 3435 &dev->udma_mask); 3436 3437 return 0; 3438 } 3439 3440 static int ata_dev_set_mode(struct ata_device *dev) 3441 { 3442 struct ata_port *ap = dev->link->ap; 3443 struct ata_eh_context *ehc = &dev->link->eh_context; 3444 const bool nosetxfer = dev->quirks & ATA_QUIRK_NOSETXFER; 3445 const char *dev_err_whine = ""; 3446 int ign_dev_err = 0; 3447 unsigned int err_mask = 0; 3448 int rc; 3449 3450 dev->flags &= ~ATA_DFLAG_PIO; 3451 if (dev->xfer_shift == ATA_SHIFT_PIO) 3452 dev->flags |= ATA_DFLAG_PIO; 3453 3454 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id)) 3455 dev_err_whine = " (SET_XFERMODE skipped)"; 3456 else { 3457 if (nosetxfer) 3458 ata_dev_warn(dev, 3459 "NOSETXFER but PATA detected - can't " 3460 "skip SETXFER, might malfunction\n"); 3461 err_mask = ata_dev_set_xfermode(dev); 3462 } 3463 3464 if (err_mask & ~AC_ERR_DEV) 3465 goto fail; 3466 3467 /* revalidate */ 3468 ehc->i.flags |= ATA_EHI_POST_SETMODE; 3469 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); 3470 ehc->i.flags &= ~ATA_EHI_POST_SETMODE; 3471 if (rc) 3472 return rc; 3473 3474 if (dev->xfer_shift == ATA_SHIFT_PIO) { 3475 /* Old CFA may refuse this command, which is just fine */ 3476 if (ata_id_is_cfa(dev->id)) 3477 ign_dev_err = 1; 3478 /* Catch several broken garbage emulations plus some pre 3479 ATA devices */ 3480 if (ata_id_major_version(dev->id) == 0 && 3481 dev->pio_mode <= XFER_PIO_2) 3482 ign_dev_err = 1; 3483 /* Some very old devices and some bad newer ones fail 3484 any kind of SET_XFERMODE request but support PIO0-2 3485 timings and no IORDY */ 3486 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2) 3487 ign_dev_err = 1; 3488 } 3489 /* Early MWDMA devices do DMA but don't allow DMA mode setting. 3490 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */ 3491 if (dev->xfer_shift == ATA_SHIFT_MWDMA && 3492 dev->dma_mode == XFER_MW_DMA_0 && 3493 (dev->id[63] >> 8) & 1) 3494 ign_dev_err = 1; 3495 3496 /* if the device is actually configured correctly, ignore dev err */ 3497 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id))) 3498 ign_dev_err = 1; 3499 3500 if (err_mask & AC_ERR_DEV) { 3501 if (!ign_dev_err) 3502 goto fail; 3503 else 3504 dev_err_whine = " (device error ignored)"; 3505 } 3506 3507 ata_dev_dbg(dev, "xfer_shift=%u, xfer_mode=0x%x\n", 3508 dev->xfer_shift, (int)dev->xfer_mode); 3509 3510 if (!(ehc->i.flags & ATA_EHI_QUIET) || 3511 ehc->i.flags & ATA_EHI_DID_HARDRESET) 3512 ata_dev_info(dev, "configured for %s%s\n", 3513 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)), 3514 dev_err_whine); 3515 3516 return 0; 3517 3518 fail: 3519 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask); 3520 return -EIO; 3521 } 3522 3523 /** 3524 * ata_set_mode - Program timings and issue SET FEATURES - XFER 3525 * @link: link on which timings will be programmed 3526 * @r_failed_dev: out parameter for failed device 3527 * 3528 * Standard implementation of the function used to tune and set 3529 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If 3530 * ata_dev_set_mode() fails, pointer to the failing device is 3531 * returned in @r_failed_dev. 3532 * 3533 * LOCKING: 3534 * PCI/etc. bus probe sem. 3535 * 3536 * RETURNS: 3537 * 0 on success, negative errno otherwise 3538 */ 3539 3540 int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) 3541 { 3542 struct ata_port *ap = link->ap; 3543 struct ata_device *dev; 3544 int rc = 0, used_dma = 0, found = 0; 3545 3546 /* step 1: calculate xfer_mask */ 3547 ata_for_each_dev(dev, link, ENABLED) { 3548 unsigned int pio_mask, dma_mask; 3549 unsigned int mode_mask; 3550 3551 mode_mask = ATA_DMA_MASK_ATA; 3552 if (dev->class == ATA_DEV_ATAPI) 3553 mode_mask = ATA_DMA_MASK_ATAPI; 3554 else if (ata_id_is_cfa(dev->id)) 3555 mode_mask = ATA_DMA_MASK_CFA; 3556 3557 ata_dev_xfermask(dev); 3558 ata_force_xfermask(dev); 3559 3560 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); 3561 3562 if (libata_dma_mask & mode_mask) 3563 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, 3564 dev->udma_mask); 3565 else 3566 dma_mask = 0; 3567 3568 dev->pio_mode = ata_xfer_mask2mode(pio_mask); 3569 dev->dma_mode = ata_xfer_mask2mode(dma_mask); 3570 3571 found = 1; 3572 if (ata_dma_enabled(dev)) 3573 used_dma = 1; 3574 } 3575 if (!found) 3576 goto out; 3577 3578 /* step 2: always set host PIO timings */ 3579 ata_for_each_dev(dev, link, ENABLED) { 3580 if (dev->pio_mode == 0xff) { 3581 ata_dev_warn(dev, "no PIO support\n"); 3582 rc = -EINVAL; 3583 goto out; 3584 } 3585 3586 dev->xfer_mode = dev->pio_mode; 3587 dev->xfer_shift = ATA_SHIFT_PIO; 3588 if (ap->ops->set_piomode) 3589 ap->ops->set_piomode(ap, dev); 3590 } 3591 3592 /* step 3: set host DMA timings */ 3593 ata_for_each_dev(dev, link, ENABLED) { 3594 if (!ata_dma_enabled(dev)) 3595 continue; 3596 3597 dev->xfer_mode = dev->dma_mode; 3598 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); 3599 if (ap->ops->set_dmamode) 3600 ap->ops->set_dmamode(ap, dev); 3601 } 3602 3603 /* step 4: update devices' xfer mode */ 3604 ata_for_each_dev(dev, link, ENABLED) { 3605 rc = ata_dev_set_mode(dev); 3606 if (rc) 3607 goto out; 3608 } 3609 3610 /* Record simplex status. If we selected DMA then the other 3611 * host channels are not permitted to do so. 3612 */ 3613 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) 3614 ap->host->simplex_claimed = ap; 3615 3616 out: 3617 if (rc) 3618 *r_failed_dev = dev; 3619 return rc; 3620 } 3621 EXPORT_SYMBOL_GPL(ata_set_mode); 3622 3623 /** 3624 * ata_wait_ready - wait for link to become ready 3625 * @link: link to be waited on 3626 * @deadline: deadline jiffies for the operation 3627 * @check_ready: callback to check link readiness 3628 * 3629 * Wait for @link to become ready. @check_ready should return 3630 * positive number if @link is ready, 0 if it isn't, -ENODEV if 3631 * link doesn't seem to be occupied, other errno for other error 3632 * conditions. 3633 * 3634 * Transient -ENODEV conditions are allowed for 3635 * ATA_TMOUT_FF_WAIT. 3636 * 3637 * LOCKING: 3638 * EH context. 3639 * 3640 * RETURNS: 3641 * 0 if @link is ready before @deadline; otherwise, -errno. 3642 */ 3643 int ata_wait_ready(struct ata_link *link, unsigned long deadline, 3644 int (*check_ready)(struct ata_link *link)) 3645 { 3646 unsigned long start = jiffies; 3647 unsigned long nodev_deadline; 3648 int warned = 0; 3649 3650 /* choose which 0xff timeout to use, read comment in libata.h */ 3651 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN) 3652 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG); 3653 else 3654 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT); 3655 3656 /* Slave readiness can't be tested separately from master. On 3657 * M/S emulation configuration, this function should be called 3658 * only on the master and it will handle both master and slave. 3659 */ 3660 WARN_ON(link == link->ap->slave_link); 3661 3662 if (time_after(nodev_deadline, deadline)) 3663 nodev_deadline = deadline; 3664 3665 while (1) { 3666 unsigned long now = jiffies; 3667 int ready, tmp; 3668 3669 ready = tmp = check_ready(link); 3670 if (ready > 0) 3671 return 0; 3672 3673 /* 3674 * -ENODEV could be transient. Ignore -ENODEV if link 3675 * is online. Also, some SATA devices take a long 3676 * time to clear 0xff after reset. Wait for 3677 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't 3678 * offline. 3679 * 3680 * Note that some PATA controllers (pata_ali) explode 3681 * if status register is read more than once when 3682 * there's no device attached. 3683 */ 3684 if (ready == -ENODEV) { 3685 if (ata_link_online(link)) 3686 ready = 0; 3687 else if ((link->ap->flags & ATA_FLAG_SATA) && 3688 !ata_link_offline(link) && 3689 time_before(now, nodev_deadline)) 3690 ready = 0; 3691 } 3692 3693 if (ready) 3694 return ready; 3695 if (time_after(now, deadline)) 3696 return -EBUSY; 3697 3698 if (!warned && time_after(now, start + 5 * HZ) && 3699 (deadline - now > 3 * HZ)) { 3700 ata_link_warn(link, 3701 "link is slow to respond, please be patient " 3702 "(ready=%d)\n", tmp); 3703 warned = 1; 3704 } 3705 3706 ata_msleep(link->ap, 50); 3707 } 3708 } 3709 3710 /** 3711 * ata_wait_after_reset - wait for link to become ready after reset 3712 * @link: link to be waited on 3713 * @deadline: deadline jiffies for the operation 3714 * @check_ready: callback to check link readiness 3715 * 3716 * Wait for @link to become ready after reset. 3717 * 3718 * LOCKING: 3719 * EH context. 3720 * 3721 * RETURNS: 3722 * 0 if @link is ready before @deadline; otherwise, -errno. 3723 */ 3724 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 3725 int (*check_ready)(struct ata_link *link)) 3726 { 3727 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET); 3728 3729 return ata_wait_ready(link, deadline, check_ready); 3730 } 3731 EXPORT_SYMBOL_GPL(ata_wait_after_reset); 3732 3733 /** 3734 * ata_std_prereset - prepare for reset 3735 * @link: ATA link to be reset 3736 * @deadline: deadline jiffies for the operation 3737 * 3738 * @link is about to be reset. Initialize it. Failure from 3739 * prereset makes libata abort whole reset sequence and give up 3740 * that port, so prereset should be best-effort. It does its 3741 * best to prepare for reset sequence but if things go wrong, it 3742 * should just whine, not fail. 3743 * 3744 * LOCKING: 3745 * Kernel thread context (may sleep) 3746 * 3747 * RETURNS: 3748 * Always 0. 3749 */ 3750 int ata_std_prereset(struct ata_link *link, unsigned long deadline) 3751 { 3752 struct ata_port *ap = link->ap; 3753 struct ata_eh_context *ehc = &link->eh_context; 3754 const unsigned int *timing = sata_ehc_deb_timing(ehc); 3755 int rc; 3756 3757 /* if we're about to do hardreset, nothing more to do */ 3758 if (ehc->i.action & ATA_EH_HARDRESET) 3759 return 0; 3760 3761 /* if SATA, resume link */ 3762 if (ap->flags & ATA_FLAG_SATA) { 3763 rc = sata_link_resume(link, timing, deadline); 3764 /* whine about phy resume failure but proceed */ 3765 if (rc && rc != -EOPNOTSUPP) 3766 ata_link_warn(link, 3767 "failed to resume link for reset (errno=%d)\n", 3768 rc); 3769 } 3770 3771 /* no point in trying softreset on offline link */ 3772 if (ata_phys_link_offline(link)) 3773 ehc->i.action &= ~ATA_EH_SOFTRESET; 3774 3775 return 0; 3776 } 3777 EXPORT_SYMBOL_GPL(ata_std_prereset); 3778 3779 /** 3780 * ata_std_postreset - standard postreset callback 3781 * @link: the target ata_link 3782 * @classes: classes of attached devices 3783 * 3784 * This function is invoked after a successful reset. Note that 3785 * the device might have been reset more than once using 3786 * different reset methods before postreset is invoked. 3787 * 3788 * LOCKING: 3789 * Kernel thread context (may sleep) 3790 */ 3791 void ata_std_postreset(struct ata_link *link, unsigned int *classes) 3792 { 3793 u32 serror; 3794 3795 /* reset complete, clear SError */ 3796 if (!sata_scr_read(link, SCR_ERROR, &serror)) 3797 sata_scr_write(link, SCR_ERROR, serror); 3798 3799 /* print link status */ 3800 sata_print_link_status(link); 3801 } 3802 EXPORT_SYMBOL_GPL(ata_std_postreset); 3803 3804 /** 3805 * ata_dev_same_device - Determine whether new ID matches configured device 3806 * @dev: device to compare against 3807 * @new_class: class of the new device 3808 * @new_id: IDENTIFY page of the new device 3809 * 3810 * Compare @new_class and @new_id against @dev and determine 3811 * whether @dev is the device indicated by @new_class and 3812 * @new_id. 3813 * 3814 * LOCKING: 3815 * None. 3816 * 3817 * RETURNS: 3818 * 1 if @dev matches @new_class and @new_id, 0 otherwise. 3819 */ 3820 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, 3821 const u16 *new_id) 3822 { 3823 const u16 *old_id = dev->id; 3824 unsigned char model[2][ATA_ID_PROD_LEN + 1]; 3825 unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; 3826 3827 if (dev->class != new_class) { 3828 ata_dev_info(dev, "class mismatch %d != %d\n", 3829 dev->class, new_class); 3830 return 0; 3831 } 3832 3833 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); 3834 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); 3835 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); 3836 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); 3837 3838 if (strcmp(model[0], model[1])) { 3839 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n", 3840 model[0], model[1]); 3841 return 0; 3842 } 3843 3844 if (strcmp(serial[0], serial[1])) { 3845 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n", 3846 serial[0], serial[1]); 3847 return 0; 3848 } 3849 3850 return 1; 3851 } 3852 3853 /** 3854 * ata_dev_reread_id - Re-read IDENTIFY data 3855 * @dev: target ATA device 3856 * @readid_flags: read ID flags 3857 * 3858 * Re-read IDENTIFY page and make sure @dev is still attached to 3859 * the port. 3860 * 3861 * LOCKING: 3862 * Kernel thread context (may sleep) 3863 * 3864 * RETURNS: 3865 * 0 on success, negative errno otherwise 3866 */ 3867 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) 3868 { 3869 unsigned int class = dev->class; 3870 u16 *id = (void *)dev->sector_buf; 3871 int rc; 3872 3873 /* read ID data */ 3874 rc = ata_dev_read_id(dev, &class, readid_flags, id); 3875 if (rc) 3876 return rc; 3877 3878 /* is the device still there? */ 3879 if (!ata_dev_same_device(dev, class, id)) 3880 return -ENODEV; 3881 3882 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); 3883 return 0; 3884 } 3885 3886 /** 3887 * ata_dev_revalidate - Revalidate ATA device 3888 * @dev: device to revalidate 3889 * @new_class: new class code 3890 * @readid_flags: read ID flags 3891 * 3892 * Re-read IDENTIFY page, make sure @dev is still attached to the 3893 * port and reconfigure it according to the new IDENTIFY page. 3894 * 3895 * LOCKING: 3896 * Kernel thread context (may sleep) 3897 * 3898 * RETURNS: 3899 * 0 on success, negative errno otherwise 3900 */ 3901 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, 3902 unsigned int readid_flags) 3903 { 3904 u64 n_sectors = dev->n_sectors; 3905 u64 n_native_sectors = dev->n_native_sectors; 3906 int rc; 3907 3908 if (!ata_dev_enabled(dev)) 3909 return -ENODEV; 3910 3911 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ 3912 if (ata_class_enabled(new_class) && new_class == ATA_DEV_PMP) { 3913 ata_dev_info(dev, "class mismatch %u != %u\n", 3914 dev->class, new_class); 3915 rc = -ENODEV; 3916 goto fail; 3917 } 3918 3919 /* re-read ID */ 3920 rc = ata_dev_reread_id(dev, readid_flags); 3921 if (rc) 3922 goto fail; 3923 3924 /* configure device according to the new ID */ 3925 rc = ata_dev_configure(dev); 3926 if (rc) 3927 goto fail; 3928 3929 /* verify n_sectors hasn't changed */ 3930 if (dev->class != ATA_DEV_ATA || !n_sectors || 3931 dev->n_sectors == n_sectors) 3932 return 0; 3933 3934 /* n_sectors has changed */ 3935 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n", 3936 (unsigned long long)n_sectors, 3937 (unsigned long long)dev->n_sectors); 3938 3939 /* 3940 * Something could have caused HPA to be unlocked 3941 * involuntarily. If n_native_sectors hasn't changed and the 3942 * new size matches it, keep the device. 3943 */ 3944 if (dev->n_native_sectors == n_native_sectors && 3945 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) { 3946 ata_dev_warn(dev, 3947 "new n_sectors matches native, probably " 3948 "late HPA unlock, n_sectors updated\n"); 3949 /* use the larger n_sectors */ 3950 return 0; 3951 } 3952 3953 /* 3954 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try 3955 * unlocking HPA in those cases. 3956 * 3957 * https://bugzilla.kernel.org/show_bug.cgi?id=15396 3958 */ 3959 if (dev->n_native_sectors == n_native_sectors && 3960 dev->n_sectors < n_sectors && n_sectors == n_native_sectors && 3961 !(dev->quirks & ATA_QUIRK_BROKEN_HPA)) { 3962 ata_dev_warn(dev, 3963 "old n_sectors matches native, probably " 3964 "late HPA lock, will try to unlock HPA\n"); 3965 /* try unlocking HPA */ 3966 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 3967 rc = -EIO; 3968 } else 3969 rc = -ENODEV; 3970 3971 /* restore original n_[native_]sectors and fail */ 3972 dev->n_native_sectors = n_native_sectors; 3973 dev->n_sectors = n_sectors; 3974 fail: 3975 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc); 3976 return rc; 3977 } 3978 3979 static const char * const ata_quirk_names[] = { 3980 [__ATA_QUIRK_DIAGNOSTIC] = "diagnostic", 3981 [__ATA_QUIRK_NODMA] = "nodma", 3982 [__ATA_QUIRK_NONCQ] = "noncq", 3983 [__ATA_QUIRK_MAX_SEC_128] = "maxsec128", 3984 [__ATA_QUIRK_BROKEN_HPA] = "brokenhpa", 3985 [__ATA_QUIRK_DISABLE] = "disable", 3986 [__ATA_QUIRK_HPA_SIZE] = "hpasize", 3987 [__ATA_QUIRK_IVB] = "ivb", 3988 [__ATA_QUIRK_STUCK_ERR] = "stuckerr", 3989 [__ATA_QUIRK_BRIDGE_OK] = "bridgeok", 3990 [__ATA_QUIRK_ATAPI_MOD16_DMA] = "atapimod16dma", 3991 [__ATA_QUIRK_FIRMWARE_WARN] = "firmwarewarn", 3992 [__ATA_QUIRK_1_5_GBPS] = "1.5gbps", 3993 [__ATA_QUIRK_NOSETXFER] = "nosetxfer", 3994 [__ATA_QUIRK_BROKEN_FPDMA_AA] = "brokenfpdmaaa", 3995 [__ATA_QUIRK_DUMP_ID] = "dumpid", 3996 [__ATA_QUIRK_MAX_SEC_LBA48] = "maxseclba48", 3997 [__ATA_QUIRK_ATAPI_DMADIR] = "atapidmadir", 3998 [__ATA_QUIRK_NO_NCQ_TRIM] = "noncqtrim", 3999 [__ATA_QUIRK_NOLPM] = "nolpm", 4000 [__ATA_QUIRK_WD_BROKEN_LPM] = "wdbrokenlpm", 4001 [__ATA_QUIRK_ZERO_AFTER_TRIM] = "zeroaftertrim", 4002 [__ATA_QUIRK_NO_DMA_LOG] = "nodmalog", 4003 [__ATA_QUIRK_NOTRIM] = "notrim", 4004 [__ATA_QUIRK_MAX_SEC_1024] = "maxsec1024", 4005 [__ATA_QUIRK_MAX_SEC_8191] = "maxsec8191", 4006 [__ATA_QUIRK_MAX_TRIM_128M] = "maxtrim128m", 4007 [__ATA_QUIRK_NO_NCQ_ON_ATI] = "noncqonati", 4008 [__ATA_QUIRK_NO_LPM_ON_ATI] = "nolpmonati", 4009 [__ATA_QUIRK_NO_ID_DEV_LOG] = "noiddevlog", 4010 [__ATA_QUIRK_NO_LOG_DIR] = "nologdir", 4011 [__ATA_QUIRK_NO_FUA] = "nofua", 4012 }; 4013 4014 static void ata_dev_print_quirks(const struct ata_device *dev, 4015 const char *model, const char *rev, 4016 unsigned int quirks) 4017 { 4018 struct ata_eh_context *ehc = &dev->link->eh_context; 4019 int n = 0, i; 4020 size_t sz; 4021 char *str; 4022 4023 if (!ata_dev_print_info(dev) || ehc->i.flags & ATA_EHI_DID_PRINT_QUIRKS) 4024 return; 4025 4026 ehc->i.flags |= ATA_EHI_DID_PRINT_QUIRKS; 4027 4028 if (!quirks) 4029 return; 4030 4031 sz = 64 + ARRAY_SIZE(ata_quirk_names) * 16; 4032 str = kmalloc(sz, GFP_KERNEL); 4033 if (!str) 4034 return; 4035 4036 n = snprintf(str, sz, "Model '%s', rev '%s', applying quirks:", 4037 model, rev); 4038 4039 for (i = 0; i < ARRAY_SIZE(ata_quirk_names); i++) { 4040 if (quirks & (1U << i)) 4041 n += snprintf(str + n, sz - n, 4042 " %s", ata_quirk_names[i]); 4043 } 4044 4045 ata_dev_warn(dev, "%s\n", str); 4046 4047 kfree(str); 4048 } 4049 4050 struct ata_dev_quirks_entry { 4051 const char *model_num; 4052 const char *model_rev; 4053 unsigned int quirks; 4054 }; 4055 4056 static const struct ata_dev_quirks_entry __ata_dev_quirks[] = { 4057 /* Devices with DMA related problems under Linux */ 4058 { "WDC AC11000H", NULL, ATA_QUIRK_NODMA }, 4059 { "WDC AC22100H", NULL, ATA_QUIRK_NODMA }, 4060 { "WDC AC32500H", NULL, ATA_QUIRK_NODMA }, 4061 { "WDC AC33100H", NULL, ATA_QUIRK_NODMA }, 4062 { "WDC AC31600H", NULL, ATA_QUIRK_NODMA }, 4063 { "WDC AC32100H", "24.09P07", ATA_QUIRK_NODMA }, 4064 { "WDC AC23200L", "21.10N21", ATA_QUIRK_NODMA }, 4065 { "Compaq CRD-8241B", NULL, ATA_QUIRK_NODMA }, 4066 { "CRD-8400B", NULL, ATA_QUIRK_NODMA }, 4067 { "CRD-848[02]B", NULL, ATA_QUIRK_NODMA }, 4068 { "CRD-84", NULL, ATA_QUIRK_NODMA }, 4069 { "SanDisk SDP3B", NULL, ATA_QUIRK_NODMA }, 4070 { "SanDisk SDP3B-64", NULL, ATA_QUIRK_NODMA }, 4071 { "SANYO CD-ROM CRD", NULL, ATA_QUIRK_NODMA }, 4072 { "HITACHI CDR-8", NULL, ATA_QUIRK_NODMA }, 4073 { "HITACHI CDR-8[34]35", NULL, ATA_QUIRK_NODMA }, 4074 { "Toshiba CD-ROM XM-6202B", NULL, ATA_QUIRK_NODMA }, 4075 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_QUIRK_NODMA }, 4076 { "CD-532E-A", NULL, ATA_QUIRK_NODMA }, 4077 { "E-IDE CD-ROM CR-840", NULL, ATA_QUIRK_NODMA }, 4078 { "CD-ROM Drive/F5A", NULL, ATA_QUIRK_NODMA }, 4079 { "WPI CDD-820", NULL, ATA_QUIRK_NODMA }, 4080 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_QUIRK_NODMA }, 4081 { "SAMSUNG CD-ROM SC", NULL, ATA_QUIRK_NODMA }, 4082 { "ATAPI CD-ROM DRIVE 40X MAXIMUM", NULL, ATA_QUIRK_NODMA }, 4083 { "_NEC DV5800A", NULL, ATA_QUIRK_NODMA }, 4084 { "SAMSUNG CD-ROM SN-124", "N001", ATA_QUIRK_NODMA }, 4085 { "Seagate STT20000A", NULL, ATA_QUIRK_NODMA }, 4086 { " 2GB ATA Flash Disk", "ADMA428M", ATA_QUIRK_NODMA }, 4087 { "VRFDFC22048UCHC-TE*", NULL, ATA_QUIRK_NODMA }, 4088 /* Odd clown on sil3726/4726 PMPs */ 4089 { "Config Disk", NULL, ATA_QUIRK_DISABLE }, 4090 /* Similar story with ASMedia 1092 */ 4091 { "ASMT109x- Config", NULL, ATA_QUIRK_DISABLE }, 4092 4093 /* Weird ATAPI devices */ 4094 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_QUIRK_MAX_SEC_128 }, 4095 { "QUANTUM DAT DAT72-000", NULL, ATA_QUIRK_ATAPI_MOD16_DMA }, 4096 { "Slimtype DVD A DS8A8SH", NULL, ATA_QUIRK_MAX_SEC_LBA48 }, 4097 { "Slimtype DVD A DS8A9SH", NULL, ATA_QUIRK_MAX_SEC_LBA48 }, 4098 4099 /* 4100 * Causes silent data corruption with higher max sects. 4101 * http://lkml.kernel.org/g/x49wpy40ysk.fsf@segfault.boston.devel.redhat.com 4102 */ 4103 { "ST380013AS", "3.20", ATA_QUIRK_MAX_SEC_1024 }, 4104 4105 /* 4106 * These devices time out with higher max sects. 4107 * https://bugzilla.kernel.org/show_bug.cgi?id=121671 4108 */ 4109 { "LITEON CX1-JB*-HP", NULL, ATA_QUIRK_MAX_SEC_1024 }, 4110 { "LITEON EP1-*", NULL, ATA_QUIRK_MAX_SEC_1024 }, 4111 4112 /* 4113 * These devices time out with higher max sects. 4114 * https://bugzilla.kernel.org/show_bug.cgi?id=220693 4115 */ 4116 { "DELLBOSS VD", "MV.R00-0", ATA_QUIRK_MAX_SEC_8191 }, 4117 4118 /* Devices we expect to fail diagnostics */ 4119 4120 /* Devices where NCQ should be avoided */ 4121 /* NCQ is slow */ 4122 { "WDC WD740ADFD-00", NULL, ATA_QUIRK_NONCQ }, 4123 { "WDC WD740ADFD-00NLR1", NULL, ATA_QUIRK_NONCQ }, 4124 /* http://thread.gmane.org/gmane.linux.ide/14907 */ 4125 { "FUJITSU MHT2060BH", NULL, ATA_QUIRK_NONCQ }, 4126 /* NCQ is broken */ 4127 { "Maxtor *", "BANC*", ATA_QUIRK_NONCQ }, 4128 { "Maxtor 7V300F0", "VA111630", ATA_QUIRK_NONCQ }, 4129 { "ST380817AS", "3.42", ATA_QUIRK_NONCQ }, 4130 { "ST3160023AS", "3.42", ATA_QUIRK_NONCQ }, 4131 { "OCZ CORE_SSD", "02.10104", ATA_QUIRK_NONCQ }, 4132 4133 /* Seagate NCQ + FLUSH CACHE firmware bug */ 4134 { "ST31500341AS", "SD1[5-9]", ATA_QUIRK_NONCQ | 4135 ATA_QUIRK_FIRMWARE_WARN }, 4136 4137 { "ST31000333AS", "SD1[5-9]", ATA_QUIRK_NONCQ | 4138 ATA_QUIRK_FIRMWARE_WARN }, 4139 4140 { "ST3640[36]23AS", "SD1[5-9]", ATA_QUIRK_NONCQ | 4141 ATA_QUIRK_FIRMWARE_WARN }, 4142 4143 { "ST3320[68]13AS", "SD1[5-9]", ATA_QUIRK_NONCQ | 4144 ATA_QUIRK_FIRMWARE_WARN }, 4145 4146 /* drives which fail FPDMA_AA activation (some may freeze afterwards) 4147 the ST disks also have LPM issues */ 4148 { "ST1000LM024 HN-M101MBB", NULL, ATA_QUIRK_BROKEN_FPDMA_AA | 4149 ATA_QUIRK_NOLPM }, 4150 { "VB0250EAVER", "HPG7", ATA_QUIRK_BROKEN_FPDMA_AA }, 4151 4152 /* Blacklist entries taken from Silicon Image 3124/3132 4153 Windows driver .inf file - also several Linux problem reports */ 4154 { "HTS541060G9SA00", "MB3OC60D", ATA_QUIRK_NONCQ }, 4155 { "HTS541080G9SA00", "MB4OC60D", ATA_QUIRK_NONCQ }, 4156 { "HTS541010G9SA00", "MBZOC60D", ATA_QUIRK_NONCQ }, 4157 4158 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */ 4159 { "C300-CTFDDAC128MAG", "0001", ATA_QUIRK_NONCQ }, 4160 4161 /* Sandisk SD7/8/9s lock up hard on large trims */ 4162 { "SanDisk SD[789]*", NULL, ATA_QUIRK_MAX_TRIM_128M }, 4163 4164 /* devices which puke on READ_NATIVE_MAX */ 4165 { "HDS724040KLSA80", "KFAOA20N", ATA_QUIRK_BROKEN_HPA }, 4166 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_QUIRK_BROKEN_HPA }, 4167 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_QUIRK_BROKEN_HPA }, 4168 { "MAXTOR 6L080L4", "A93.0500", ATA_QUIRK_BROKEN_HPA }, 4169 4170 /* this one allows HPA unlocking but fails IOs on the area */ 4171 { "OCZ-VERTEX", "1.30", ATA_QUIRK_BROKEN_HPA }, 4172 4173 /* Devices which report 1 sector over size HPA */ 4174 { "ST340823A", NULL, ATA_QUIRK_HPA_SIZE }, 4175 { "ST320413A", NULL, ATA_QUIRK_HPA_SIZE }, 4176 { "ST310211A", NULL, ATA_QUIRK_HPA_SIZE }, 4177 4178 /* Devices which get the IVB wrong */ 4179 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_QUIRK_IVB }, 4180 /* Maybe we should just add all TSSTcorp devices... */ 4181 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_QUIRK_IVB }, 4182 4183 /* Devices that do not need bridging limits applied */ 4184 { "MTRON MSP-SATA*", NULL, ATA_QUIRK_BRIDGE_OK }, 4185 { "BUFFALO HD-QSU2/R5", NULL, ATA_QUIRK_BRIDGE_OK }, 4186 4187 /* Devices which aren't very happy with higher link speeds */ 4188 { "WD My Book", NULL, ATA_QUIRK_1_5_GBPS }, 4189 { "Seagate FreeAgent GoFlex", NULL, ATA_QUIRK_1_5_GBPS }, 4190 4191 /* 4192 * Devices which choke on SETXFER. Applies only if both the 4193 * device and controller are SATA. 4194 */ 4195 { "PIONEER DVD-RW DVRTD08", NULL, ATA_QUIRK_NOSETXFER }, 4196 { "PIONEER DVD-RW DVRTD08A", NULL, ATA_QUIRK_NOSETXFER }, 4197 { "PIONEER DVD-RW DVR-215", NULL, ATA_QUIRK_NOSETXFER }, 4198 { "PIONEER DVD-RW DVR-212D", NULL, ATA_QUIRK_NOSETXFER }, 4199 { "PIONEER DVD-RW DVR-216D", NULL, ATA_QUIRK_NOSETXFER }, 4200 4201 /* These specific Pioneer models have LPM issues */ 4202 { "PIONEER BD-RW BDR-207M", NULL, ATA_QUIRK_NOLPM }, 4203 { "PIONEER BD-RW BDR-205", NULL, ATA_QUIRK_NOLPM }, 4204 4205 /* Crucial devices with broken LPM support */ 4206 { "CT*0BX*00SSD1", NULL, ATA_QUIRK_NOLPM }, 4207 4208 /* 512GB MX100 with MU01 firmware has both queued TRIM and LPM issues */ 4209 { "Crucial_CT512MX100*", "MU01", ATA_QUIRK_NO_NCQ_TRIM | 4210 ATA_QUIRK_ZERO_AFTER_TRIM | 4211 ATA_QUIRK_NOLPM }, 4212 /* 512GB MX100 with newer firmware has only LPM issues */ 4213 { "Crucial_CT512MX100*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM | 4214 ATA_QUIRK_NOLPM }, 4215 4216 /* 480GB+ M500 SSDs have both queued TRIM and LPM issues */ 4217 { "Crucial_CT480M500*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4218 ATA_QUIRK_ZERO_AFTER_TRIM | 4219 ATA_QUIRK_NOLPM }, 4220 { "Crucial_CT960M500*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4221 ATA_QUIRK_ZERO_AFTER_TRIM | 4222 ATA_QUIRK_NOLPM }, 4223 4224 /* AMD Radeon devices with broken LPM support */ 4225 { "R3SL240G", NULL, ATA_QUIRK_NOLPM }, 4226 4227 /* Apacer models with LPM issues */ 4228 { "Apacer AS340*", NULL, ATA_QUIRK_NOLPM }, 4229 4230 /* Silicon Motion models with LPM issues */ 4231 { "MD619HXCLDE3TC", "TCVAID", ATA_QUIRK_NOLPM }, 4232 { "MD619GXCLDE3TC", "TCV35D", ATA_QUIRK_NOLPM }, 4233 4234 /* These specific Samsung models/firmware-revs do not handle LPM well */ 4235 { "SAMSUNG MZMPC128HBFU-000MV", "CXM14M1Q", ATA_QUIRK_NOLPM }, 4236 { "SAMSUNG SSD PM830 mSATA *", "CXM13D1Q", ATA_QUIRK_NOLPM }, 4237 { "SAMSUNG MZ7TD256HAFV-000L9", NULL, ATA_QUIRK_NOLPM }, 4238 { "SAMSUNG MZ7TE512HMHP-000L1", "EXT06L0Q", ATA_QUIRK_NOLPM }, 4239 4240 /* devices that don't properly handle queued TRIM commands */ 4241 { "Micron_M500IT_*", "MU01", ATA_QUIRK_NO_NCQ_TRIM | 4242 ATA_QUIRK_ZERO_AFTER_TRIM }, 4243 { "Micron_M500_*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4244 ATA_QUIRK_ZERO_AFTER_TRIM }, 4245 { "Micron_M5[15]0_*", "MU01", ATA_QUIRK_NO_NCQ_TRIM | 4246 ATA_QUIRK_ZERO_AFTER_TRIM }, 4247 { "Micron_1100_*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4248 ATA_QUIRK_ZERO_AFTER_TRIM, }, 4249 { "Crucial_CT*M500*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4250 ATA_QUIRK_ZERO_AFTER_TRIM }, 4251 { "Crucial_CT*M550*", "MU01", ATA_QUIRK_NO_NCQ_TRIM | 4252 ATA_QUIRK_ZERO_AFTER_TRIM }, 4253 { "Crucial_CT*MX100*", "MU01", ATA_QUIRK_NO_NCQ_TRIM | 4254 ATA_QUIRK_ZERO_AFTER_TRIM }, 4255 { "Samsung SSD 840 EVO*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4256 ATA_QUIRK_NO_DMA_LOG | 4257 ATA_QUIRK_ZERO_AFTER_TRIM }, 4258 { "Samsung SSD 840*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4259 ATA_QUIRK_ZERO_AFTER_TRIM }, 4260 { "Samsung SSD 850*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4261 ATA_QUIRK_ZERO_AFTER_TRIM }, 4262 { "Samsung SSD 860*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4263 ATA_QUIRK_ZERO_AFTER_TRIM | 4264 ATA_QUIRK_NO_NCQ_ON_ATI | 4265 ATA_QUIRK_NO_LPM_ON_ATI }, 4266 { "Samsung SSD 870*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4267 ATA_QUIRK_ZERO_AFTER_TRIM | 4268 ATA_QUIRK_NO_NCQ_ON_ATI | 4269 ATA_QUIRK_NO_LPM_ON_ATI }, 4270 { "SAMSUNG*MZ7LH*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4271 ATA_QUIRK_ZERO_AFTER_TRIM | 4272 ATA_QUIRK_NO_NCQ_ON_ATI | 4273 ATA_QUIRK_NO_LPM_ON_ATI }, 4274 { "FCCT*M500*", NULL, ATA_QUIRK_NO_NCQ_TRIM | 4275 ATA_QUIRK_ZERO_AFTER_TRIM }, 4276 4277 /* devices that don't properly handle TRIM commands */ 4278 { "SuperSSpeed S238*", NULL, ATA_QUIRK_NOTRIM }, 4279 { "M88V29*", NULL, ATA_QUIRK_NOTRIM }, 4280 4281 /* 4282 * As defined, the DRAT (Deterministic Read After Trim) and RZAT 4283 * (Return Zero After Trim) flags in the ATA Command Set are 4284 * unreliable in the sense that they only define what happens if 4285 * the device successfully executed the DSM TRIM command. TRIM 4286 * is only advisory, however, and the device is free to silently 4287 * ignore all or parts of the request. 4288 * 4289 * Whitelist drives that are known to reliably return zeroes 4290 * after TRIM. 4291 */ 4292 4293 /* 4294 * The intel 510 drive has buggy DRAT/RZAT. Explicitly exclude 4295 * that model before whitelisting all other intel SSDs. 4296 */ 4297 { "INTEL*SSDSC2MH*", NULL, 0 }, 4298 4299 { "Micron*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4300 { "Crucial*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4301 { "INTEL*SSD*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4302 { "SSD*INTEL*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4303 { "Samsung*SSD*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4304 { "SAMSUNG*SSD*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4305 { "SAMSUNG*MZ7KM*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4306 { "ST[1248][0248]0[FH]*", NULL, ATA_QUIRK_ZERO_AFTER_TRIM }, 4307 4308 /* 4309 * Some WD SATA-I drives spin up and down erratically when the link 4310 * is put into the slumber mode. We don't have full list of the 4311 * affected devices. Disable LPM if the device matches one of the 4312 * known prefixes and is SATA-1. As a side effect LPM partial is 4313 * lost too. 4314 * 4315 * https://bugzilla.kernel.org/show_bug.cgi?id=57211 4316 */ 4317 { "WDC WD800JD-*", NULL, ATA_QUIRK_WD_BROKEN_LPM }, 4318 { "WDC WD1200JD-*", NULL, ATA_QUIRK_WD_BROKEN_LPM }, 4319 { "WDC WD1600JD-*", NULL, ATA_QUIRK_WD_BROKEN_LPM }, 4320 { "WDC WD2000JD-*", NULL, ATA_QUIRK_WD_BROKEN_LPM }, 4321 { "WDC WD2500JD-*", NULL, ATA_QUIRK_WD_BROKEN_LPM }, 4322 { "WDC WD3000JD-*", NULL, ATA_QUIRK_WD_BROKEN_LPM }, 4323 { "WDC WD3200JD-*", NULL, ATA_QUIRK_WD_BROKEN_LPM }, 4324 4325 /* 4326 * This sata dom device goes on a walkabout when the ATA_LOG_DIRECTORY 4327 * log page is accessed. Ensure we never ask for this log page with 4328 * these devices. 4329 */ 4330 { "SATADOM-ML 3ME", NULL, ATA_QUIRK_NO_LOG_DIR }, 4331 4332 /* Buggy FUA */ 4333 { "Maxtor", "BANC1G10", ATA_QUIRK_NO_FUA }, 4334 { "WDC*WD2500J*", NULL, ATA_QUIRK_NO_FUA }, 4335 { "OCZ-VERTEX*", NULL, ATA_QUIRK_NO_FUA }, 4336 { "INTEL*SSDSC2CT*", NULL, ATA_QUIRK_NO_FUA }, 4337 4338 /* End Marker */ 4339 { } 4340 }; 4341 4342 static unsigned int ata_dev_quirks(const struct ata_device *dev) 4343 { 4344 unsigned char model_num[ATA_ID_PROD_LEN + 1]; 4345 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; 4346 const struct ata_dev_quirks_entry *ad = __ata_dev_quirks; 4347 4348 /* dev->quirks is an unsigned int. */ 4349 BUILD_BUG_ON(__ATA_QUIRK_MAX > 32); 4350 4351 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 4352 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); 4353 4354 while (ad->model_num) { 4355 if (glob_match(ad->model_num, model_num) && 4356 (!ad->model_rev || glob_match(ad->model_rev, model_rev))) { 4357 ata_dev_print_quirks(dev, model_num, model_rev, 4358 ad->quirks); 4359 return ad->quirks; 4360 } 4361 ad++; 4362 } 4363 return 0; 4364 } 4365 4366 static bool ata_dev_nodma(const struct ata_device *dev) 4367 { 4368 /* 4369 * We do not support polling DMA. Deny DMA for those ATAPI devices 4370 * with CDB-intr (and use PIO) if the LLDD handles only interrupts in 4371 * the HSM_ST_LAST state. 4372 */ 4373 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && 4374 (dev->flags & ATA_DFLAG_CDB_INTR)) 4375 return true; 4376 return dev->quirks & ATA_QUIRK_NODMA; 4377 } 4378 4379 /** 4380 * ata_is_40wire - check drive side detection 4381 * @dev: device 4382 * 4383 * Perform drive side detection decoding, allowing for device vendors 4384 * who can't follow the documentation. 4385 */ 4386 4387 static int ata_is_40wire(struct ata_device *dev) 4388 { 4389 if (dev->quirks & ATA_QUIRK_IVB) 4390 return ata_drive_40wire_relaxed(dev->id); 4391 return ata_drive_40wire(dev->id); 4392 } 4393 4394 /** 4395 * cable_is_40wire - 40/80/SATA decider 4396 * @ap: port to consider 4397 * 4398 * This function encapsulates the policy for speed management 4399 * in one place. At the moment we don't cache the result but 4400 * there is a good case for setting ap->cbl to the result when 4401 * we are called with unknown cables (and figuring out if it 4402 * impacts hotplug at all). 4403 * 4404 * Return 1 if the cable appears to be 40 wire. 4405 */ 4406 4407 static int cable_is_40wire(struct ata_port *ap) 4408 { 4409 struct ata_link *link; 4410 struct ata_device *dev; 4411 4412 /* If the controller thinks we are 40 wire, we are. */ 4413 if (ap->cbl == ATA_CBL_PATA40) 4414 return 1; 4415 4416 /* If the controller thinks we are 80 wire, we are. */ 4417 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA) 4418 return 0; 4419 4420 /* If the system is known to be 40 wire short cable (eg 4421 * laptop), then we allow 80 wire modes even if the drive 4422 * isn't sure. 4423 */ 4424 if (ap->cbl == ATA_CBL_PATA40_SHORT) 4425 return 0; 4426 4427 /* If the controller doesn't know, we scan. 4428 * 4429 * Note: We look for all 40 wire detects at this point. Any 4430 * 80 wire detect is taken to be 80 wire cable because 4431 * - in many setups only the one drive (slave if present) will 4432 * give a valid detect 4433 * - if you have a non detect capable drive you don't want it 4434 * to colour the choice 4435 */ 4436 ata_for_each_link(link, ap, EDGE) { 4437 ata_for_each_dev(dev, link, ENABLED) { 4438 if (!ata_is_40wire(dev)) 4439 return 0; 4440 } 4441 } 4442 return 1; 4443 } 4444 4445 /** 4446 * ata_dev_xfermask - Compute supported xfermask of the given device 4447 * @dev: Device to compute xfermask for 4448 * 4449 * Compute supported xfermask of @dev and store it in 4450 * dev->*_mask. This function is responsible for applying all 4451 * known limits including host controller limits, device quirks, etc... 4452 * 4453 * LOCKING: 4454 * None. 4455 */ 4456 static void ata_dev_xfermask(struct ata_device *dev) 4457 { 4458 struct ata_link *link = dev->link; 4459 struct ata_port *ap = link->ap; 4460 struct ata_host *host = ap->host; 4461 unsigned int xfer_mask; 4462 4463 /* controller modes available */ 4464 xfer_mask = ata_pack_xfermask(ap->pio_mask, 4465 ap->mwdma_mask, ap->udma_mask); 4466 4467 /* drive modes available */ 4468 xfer_mask &= ata_pack_xfermask(dev->pio_mask, 4469 dev->mwdma_mask, dev->udma_mask); 4470 xfer_mask &= ata_id_xfermask(dev->id); 4471 4472 /* 4473 * CFA Advanced TrueIDE timings are not allowed on a shared 4474 * cable 4475 */ 4476 if (ata_dev_pair(dev)) { 4477 /* No PIO5 or PIO6 */ 4478 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); 4479 /* No MWDMA3 or MWDMA 4 */ 4480 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); 4481 } 4482 4483 if (ata_dev_nodma(dev)) { 4484 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 4485 ata_dev_warn(dev, 4486 "device does not support DMA, disabling DMA\n"); 4487 } 4488 4489 if ((host->flags & ATA_HOST_SIMPLEX) && 4490 host->simplex_claimed && host->simplex_claimed != ap) { 4491 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 4492 ata_dev_warn(dev, 4493 "simplex DMA is claimed by other device, disabling DMA\n"); 4494 } 4495 4496 if (ap->flags & ATA_FLAG_NO_IORDY) 4497 xfer_mask &= ata_pio_mask_no_iordy(dev); 4498 4499 if (ap->ops->mode_filter) 4500 xfer_mask = ap->ops->mode_filter(dev, xfer_mask); 4501 4502 /* Apply cable rule here. Don't apply it early because when 4503 * we handle hot plug the cable type can itself change. 4504 * Check this last so that we know if the transfer rate was 4505 * solely limited by the cable. 4506 * Unknown or 80 wire cables reported host side are checked 4507 * drive side as well. Cases where we know a 40wire cable 4508 * is used safely for 80 are not checked here. 4509 */ 4510 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) 4511 /* UDMA/44 or higher would be available */ 4512 if (cable_is_40wire(ap)) { 4513 ata_dev_warn(dev, 4514 "limited to UDMA/33 due to 40-wire cable\n"); 4515 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); 4516 } 4517 4518 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, 4519 &dev->mwdma_mask, &dev->udma_mask); 4520 } 4521 4522 /** 4523 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command 4524 * @dev: Device to which command will be sent 4525 * 4526 * Issue SET FEATURES - XFER MODE command to device @dev 4527 * on port @ap. 4528 * 4529 * LOCKING: 4530 * PCI/etc. bus probe sem. 4531 * 4532 * RETURNS: 4533 * 0 on success, AC_ERR_* mask otherwise. 4534 */ 4535 4536 static unsigned int ata_dev_set_xfermode(struct ata_device *dev) 4537 { 4538 struct ata_taskfile tf; 4539 4540 /* set up set-features taskfile */ 4541 ata_dev_dbg(dev, "set features - xfer mode\n"); 4542 4543 /* Some controllers and ATAPI devices show flaky interrupt 4544 * behavior after setting xfer mode. Use polling instead. 4545 */ 4546 ata_tf_init(dev, &tf); 4547 tf.command = ATA_CMD_SET_FEATURES; 4548 tf.feature = SETFEATURES_XFER; 4549 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; 4550 tf.protocol = ATA_PROT_NODATA; 4551 /* If we are using IORDY we must send the mode setting command */ 4552 if (ata_pio_need_iordy(dev)) 4553 tf.nsect = dev->xfer_mode; 4554 /* If the device has IORDY and the controller does not - turn it off */ 4555 else if (ata_id_has_iordy(dev->id)) 4556 tf.nsect = 0x01; 4557 else /* In the ancient relic department - skip all of this */ 4558 return 0; 4559 4560 /* 4561 * On some disks, this command causes spin-up, so we need longer 4562 * timeout. 4563 */ 4564 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 15000); 4565 } 4566 4567 /** 4568 * ata_dev_set_feature - Issue SET FEATURES 4569 * @dev: Device to which command will be sent 4570 * @subcmd: The SET FEATURES subcommand to be sent 4571 * @action: The sector count represents a subcommand specific action 4572 * 4573 * Issue SET FEATURES command to device @dev on port @ap with sector count 4574 * 4575 * LOCKING: 4576 * PCI/etc. bus probe sem. 4577 * 4578 * RETURNS: 4579 * 0 on success, AC_ERR_* mask otherwise. 4580 */ 4581 unsigned int ata_dev_set_feature(struct ata_device *dev, u8 subcmd, u8 action) 4582 { 4583 struct ata_taskfile tf; 4584 unsigned int timeout = 0; 4585 4586 /* set up set-features taskfile */ 4587 ata_dev_dbg(dev, "set features\n"); 4588 4589 ata_tf_init(dev, &tf); 4590 tf.command = ATA_CMD_SET_FEATURES; 4591 tf.feature = subcmd; 4592 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 4593 tf.protocol = ATA_PROT_NODATA; 4594 tf.nsect = action; 4595 4596 if (subcmd == SETFEATURES_SPINUP) 4597 timeout = ata_probe_timeout ? 4598 ata_probe_timeout * 1000 : SETFEATURES_SPINUP_TIMEOUT; 4599 4600 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, timeout); 4601 } 4602 EXPORT_SYMBOL_GPL(ata_dev_set_feature); 4603 4604 /** 4605 * ata_dev_init_params - Issue INIT DEV PARAMS command 4606 * @dev: Device to which command will be sent 4607 * @heads: Number of heads (taskfile parameter) 4608 * @sectors: Number of sectors (taskfile parameter) 4609 * 4610 * LOCKING: 4611 * Kernel thread context (may sleep) 4612 * 4613 * RETURNS: 4614 * 0 on success, AC_ERR_* mask otherwise. 4615 */ 4616 static unsigned int ata_dev_init_params(struct ata_device *dev, 4617 u16 heads, u16 sectors) 4618 { 4619 struct ata_taskfile tf; 4620 unsigned int err_mask; 4621 4622 /* Number of sectors per track 1-255. Number of heads 1-16 */ 4623 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) 4624 return AC_ERR_INVALID; 4625 4626 /* set up init dev params taskfile */ 4627 ata_dev_dbg(dev, "init dev params\n"); 4628 4629 ata_tf_init(dev, &tf); 4630 tf.command = ATA_CMD_INIT_DEV_PARAMS; 4631 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 4632 tf.protocol = ATA_PROT_NODATA; 4633 tf.nsect = sectors; 4634 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ 4635 4636 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 4637 /* A clean abort indicates an original or just out of spec drive 4638 and we should continue as we issue the setup based on the 4639 drive reported working geometry */ 4640 if (err_mask == AC_ERR_DEV && (tf.error & ATA_ABORTED)) 4641 err_mask = 0; 4642 4643 return err_mask; 4644 } 4645 4646 /** 4647 * atapi_check_dma - Check whether ATAPI DMA can be supported 4648 * @qc: Metadata associated with taskfile to check 4649 * 4650 * Allow low-level driver to filter ATA PACKET commands, returning 4651 * a status indicating whether or not it is OK to use DMA for the 4652 * supplied PACKET command. 4653 * 4654 * LOCKING: 4655 * spin_lock_irqsave(host lock) 4656 * 4657 * RETURNS: 0 when ATAPI DMA can be used 4658 * nonzero otherwise 4659 */ 4660 int atapi_check_dma(struct ata_queued_cmd *qc) 4661 { 4662 struct ata_port *ap = qc->ap; 4663 4664 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a 4665 * few ATAPI devices choke on such DMA requests. 4666 */ 4667 if (!(qc->dev->quirks & ATA_QUIRK_ATAPI_MOD16_DMA) && 4668 unlikely(qc->nbytes & 15)) 4669 return -EOPNOTSUPP; 4670 4671 if (ap->ops->check_atapi_dma) 4672 return ap->ops->check_atapi_dma(qc); 4673 4674 return 0; 4675 } 4676 4677 /** 4678 * ata_std_qc_defer - Check whether a qc needs to be deferred 4679 * @qc: ATA command in question 4680 * 4681 * Non-NCQ commands cannot run with any other command, NCQ or 4682 * not. As upper layer only knows the queue depth, we are 4683 * responsible for maintaining exclusion. This function checks 4684 * whether a new command @qc can be issued. 4685 * 4686 * LOCKING: 4687 * spin_lock_irqsave(host lock) 4688 * 4689 * RETURNS: 4690 * ATA_DEFER_* if deferring is needed, 0 otherwise. 4691 */ 4692 int ata_std_qc_defer(struct ata_queued_cmd *qc) 4693 { 4694 struct ata_link *link = qc->dev->link; 4695 4696 if (ata_is_ncq(qc->tf.protocol)) { 4697 if (!ata_tag_valid(link->active_tag)) 4698 return 0; 4699 } else { 4700 if (!ata_tag_valid(link->active_tag) && !link->sactive) 4701 return 0; 4702 } 4703 4704 return ATA_DEFER_LINK; 4705 } 4706 EXPORT_SYMBOL_GPL(ata_std_qc_defer); 4707 4708 /** 4709 * ata_sg_init - Associate command with scatter-gather table. 4710 * @qc: Command to be associated 4711 * @sg: Scatter-gather table. 4712 * @n_elem: Number of elements in s/g table. 4713 * 4714 * Initialize the data-related elements of queued_cmd @qc 4715 * to point to a scatter-gather table @sg, containing @n_elem 4716 * elements. 4717 * 4718 * LOCKING: 4719 * spin_lock_irqsave(host lock) 4720 */ 4721 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 4722 unsigned int n_elem) 4723 { 4724 qc->sg = sg; 4725 qc->n_elem = n_elem; 4726 qc->cursg = qc->sg; 4727 } 4728 4729 #ifdef CONFIG_HAS_DMA 4730 4731 /** 4732 * ata_sg_clean - Unmap DMA memory associated with command 4733 * @qc: Command containing DMA memory to be released 4734 * 4735 * Unmap all mapped DMA memory associated with this command. 4736 * 4737 * LOCKING: 4738 * spin_lock_irqsave(host lock) 4739 */ 4740 static void ata_sg_clean(struct ata_queued_cmd *qc) 4741 { 4742 struct ata_port *ap = qc->ap; 4743 struct scatterlist *sg = qc->sg; 4744 int dir = qc->dma_dir; 4745 4746 WARN_ON_ONCE(sg == NULL); 4747 4748 if (qc->n_elem) 4749 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir); 4750 4751 qc->flags &= ~ATA_QCFLAG_DMAMAP; 4752 qc->sg = NULL; 4753 } 4754 4755 /** 4756 * ata_sg_setup - DMA-map the scatter-gather table associated with a command. 4757 * @qc: Command with scatter-gather table to be mapped. 4758 * 4759 * DMA-map the scatter-gather table associated with queued_cmd @qc. 4760 * 4761 * LOCKING: 4762 * spin_lock_irqsave(host lock) 4763 * 4764 * RETURNS: 4765 * Zero on success, negative on error. 4766 * 4767 */ 4768 static int ata_sg_setup(struct ata_queued_cmd *qc) 4769 { 4770 struct ata_port *ap = qc->ap; 4771 unsigned int n_elem; 4772 4773 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir); 4774 if (n_elem < 1) 4775 return -1; 4776 4777 qc->orig_n_elem = qc->n_elem; 4778 qc->n_elem = n_elem; 4779 qc->flags |= ATA_QCFLAG_DMAMAP; 4780 4781 return 0; 4782 } 4783 4784 #else /* !CONFIG_HAS_DMA */ 4785 4786 static inline void ata_sg_clean(struct ata_queued_cmd *qc) {} 4787 static inline int ata_sg_setup(struct ata_queued_cmd *qc) { return -1; } 4788 4789 #endif /* !CONFIG_HAS_DMA */ 4790 4791 /** 4792 * swap_buf_le16 - swap halves of 16-bit words in place 4793 * @buf: Buffer to swap 4794 * @buf_words: Number of 16-bit words in buffer. 4795 * 4796 * Swap halves of 16-bit words if needed to convert from 4797 * little-endian byte order to native cpu byte order, or 4798 * vice-versa. 4799 * 4800 * LOCKING: 4801 * Inherited from caller. 4802 */ 4803 void swap_buf_le16(u16 *buf, unsigned int buf_words) 4804 { 4805 #ifdef __BIG_ENDIAN 4806 unsigned int i; 4807 4808 for (i = 0; i < buf_words; i++) 4809 buf[i] = le16_to_cpu(buf[i]); 4810 #endif /* __BIG_ENDIAN */ 4811 } 4812 4813 /** 4814 * ata_qc_free - free unused ata_queued_cmd 4815 * @qc: Command to complete 4816 * 4817 * Designed to free unused ata_queued_cmd object 4818 * in case something prevents using it. 4819 * 4820 * LOCKING: 4821 * spin_lock_irqsave(host lock) 4822 */ 4823 void ata_qc_free(struct ata_queued_cmd *qc) 4824 { 4825 qc->flags = 0; 4826 if (ata_tag_valid(qc->tag)) 4827 qc->tag = ATA_TAG_POISON; 4828 } 4829 4830 void __ata_qc_complete(struct ata_queued_cmd *qc) 4831 { 4832 struct ata_port *ap; 4833 struct ata_link *link; 4834 4835 if (WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE))) 4836 return; 4837 4838 ap = qc->ap; 4839 link = qc->dev->link; 4840 4841 if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) 4842 ata_sg_clean(qc); 4843 4844 /* command should be marked inactive atomically with qc completion */ 4845 if (ata_is_ncq(qc->tf.protocol)) { 4846 link->sactive &= ~(1 << qc->hw_tag); 4847 if (!link->sactive) 4848 ap->nr_active_links--; 4849 } else { 4850 link->active_tag = ATA_TAG_POISON; 4851 ap->nr_active_links--; 4852 } 4853 4854 /* clear exclusive status */ 4855 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && 4856 ap->excl_link == link)) 4857 ap->excl_link = NULL; 4858 4859 /* 4860 * Mark qc as inactive to prevent the port interrupt handler from 4861 * completing the command twice later, before the error handler is 4862 * called. 4863 */ 4864 qc->flags &= ~ATA_QCFLAG_ACTIVE; 4865 ap->qc_active &= ~(1ULL << qc->tag); 4866 4867 /* call completion callback */ 4868 qc->complete_fn(qc); 4869 } 4870 4871 static void fill_result_tf(struct ata_queued_cmd *qc) 4872 { 4873 struct ata_port *ap = qc->ap; 4874 4875 /* 4876 * rtf may already be filled (e.g. for successful NCQ commands). 4877 * If that is the case, we have nothing to do. 4878 */ 4879 if (qc->flags & ATA_QCFLAG_RTF_FILLED) 4880 return; 4881 4882 qc->result_tf.flags = qc->tf.flags; 4883 ap->ops->qc_fill_rtf(qc); 4884 qc->flags |= ATA_QCFLAG_RTF_FILLED; 4885 } 4886 4887 static void ata_verify_xfer(struct ata_queued_cmd *qc) 4888 { 4889 struct ata_device *dev = qc->dev; 4890 4891 if (!ata_is_data(qc->tf.protocol)) 4892 return; 4893 4894 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol)) 4895 return; 4896 4897 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER; 4898 } 4899 4900 /** 4901 * ata_qc_complete - Complete an active ATA command 4902 * @qc: Command to complete 4903 * 4904 * Indicate to the mid and upper layers that an ATA command has 4905 * completed, with either an ok or not-ok status. 4906 * 4907 * Refrain from calling this function multiple times when 4908 * successfully completing multiple NCQ commands. 4909 * ata_qc_complete_multiple() should be used instead, which will 4910 * properly update IRQ expect state. 4911 * 4912 * LOCKING: 4913 * spin_lock_irqsave(host lock) 4914 */ 4915 void ata_qc_complete(struct ata_queued_cmd *qc) 4916 { 4917 struct ata_port *ap = qc->ap; 4918 struct ata_device *dev = qc->dev; 4919 struct ata_eh_info *ehi = &dev->link->eh_info; 4920 4921 /* Trigger the LED (if available) */ 4922 ledtrig_disk_activity(!!(qc->tf.flags & ATA_TFLAG_WRITE)); 4923 4924 /* 4925 * In order to synchronize EH with the regular execution path, a qc that 4926 * is owned by EH is marked with ATA_QCFLAG_EH. 4927 * 4928 * The normal execution path is responsible for not accessing a qc owned 4929 * by EH. libata core enforces the rule by returning NULL from 4930 * ata_qc_from_tag() for qcs owned by EH. 4931 */ 4932 if (unlikely(qc->err_mask)) 4933 qc->flags |= ATA_QCFLAG_EH; 4934 4935 /* 4936 * Finish internal commands without any further processing and always 4937 * with the result TF filled. 4938 */ 4939 if (unlikely(ata_tag_internal(qc->tag))) { 4940 fill_result_tf(qc); 4941 trace_ata_qc_complete_internal(qc); 4942 __ata_qc_complete(qc); 4943 return; 4944 } 4945 4946 /* Non-internal qc has failed. Fill the result TF and summon EH. */ 4947 if (unlikely(qc->flags & ATA_QCFLAG_EH)) { 4948 fill_result_tf(qc); 4949 trace_ata_qc_complete_failed(qc); 4950 ata_qc_schedule_eh(qc); 4951 return; 4952 } 4953 4954 WARN_ON_ONCE(ata_port_is_frozen(ap)); 4955 4956 /* read result TF if requested */ 4957 if (qc->flags & ATA_QCFLAG_RESULT_TF) 4958 fill_result_tf(qc); 4959 4960 trace_ata_qc_complete_done(qc); 4961 4962 /* 4963 * For CDL commands that completed without an error, check if we have 4964 * sense data (ATA_SENSE is set). If we do, then the command may have 4965 * been aborted by the device due to a limit timeout using the policy 4966 * 0xD. For these commands, invoke EH to get the command sense data. 4967 */ 4968 if (qc->flags & ATA_QCFLAG_HAS_CDL && 4969 qc->result_tf.status & ATA_SENSE) { 4970 /* 4971 * Tell SCSI EH to not overwrite scmd->result even if this 4972 * command is finished with result SAM_STAT_GOOD. 4973 */ 4974 qc->scsicmd->flags |= SCMD_FORCE_EH_SUCCESS; 4975 qc->flags |= ATA_QCFLAG_EH_SUCCESS_CMD; 4976 ehi->dev_action[dev->devno] |= ATA_EH_GET_SUCCESS_SENSE; 4977 4978 /* 4979 * set pending so that ata_qc_schedule_eh() does not trigger 4980 * fast drain, and freeze the port. 4981 */ 4982 ap->pflags |= ATA_PFLAG_EH_PENDING; 4983 ata_qc_schedule_eh(qc); 4984 return; 4985 } 4986 4987 /* Some commands need post-processing after successful completion. */ 4988 switch (qc->tf.command) { 4989 case ATA_CMD_SET_FEATURES: 4990 if (qc->tf.feature != SETFEATURES_WC_ON && 4991 qc->tf.feature != SETFEATURES_WC_OFF && 4992 qc->tf.feature != SETFEATURES_RA_ON && 4993 qc->tf.feature != SETFEATURES_RA_OFF) 4994 break; 4995 fallthrough; 4996 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */ 4997 case ATA_CMD_SET_MULTI: /* multi_count changed */ 4998 /* revalidate device */ 4999 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE; 5000 ata_port_schedule_eh(ap); 5001 break; 5002 5003 case ATA_CMD_SLEEP: 5004 dev->flags |= ATA_DFLAG_SLEEPING; 5005 break; 5006 } 5007 5008 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) 5009 ata_verify_xfer(qc); 5010 5011 __ata_qc_complete(qc); 5012 } 5013 EXPORT_SYMBOL_GPL(ata_qc_complete); 5014 5015 /** 5016 * ata_qc_get_active - get bitmask of active qcs 5017 * @ap: port in question 5018 * 5019 * LOCKING: 5020 * spin_lock_irqsave(host lock) 5021 * 5022 * RETURNS: 5023 * Bitmask of active qcs 5024 */ 5025 u64 ata_qc_get_active(struct ata_port *ap) 5026 { 5027 u64 qc_active = ap->qc_active; 5028 5029 /* ATA_TAG_INTERNAL is sent to hw as tag 0 */ 5030 if (qc_active & (1ULL << ATA_TAG_INTERNAL)) { 5031 qc_active |= (1 << 0); 5032 qc_active &= ~(1ULL << ATA_TAG_INTERNAL); 5033 } 5034 5035 return qc_active; 5036 } 5037 EXPORT_SYMBOL_GPL(ata_qc_get_active); 5038 5039 /** 5040 * ata_qc_issue - issue taskfile to device 5041 * @qc: command to issue to device 5042 * 5043 * Prepare an ATA command to submission to device. 5044 * This includes mapping the data into a DMA-able 5045 * area, filling in the S/G table, and finally 5046 * writing the taskfile to hardware, starting the command. 5047 * 5048 * LOCKING: 5049 * spin_lock_irqsave(host lock) 5050 */ 5051 void ata_qc_issue(struct ata_queued_cmd *qc) 5052 { 5053 struct ata_port *ap = qc->ap; 5054 struct ata_link *link = qc->dev->link; 5055 u8 prot = qc->tf.protocol; 5056 5057 /* Make sure only one non-NCQ command is outstanding. */ 5058 WARN_ON_ONCE(ata_tag_valid(link->active_tag)); 5059 5060 if (ata_is_ncq(prot)) { 5061 WARN_ON_ONCE(link->sactive & (1 << qc->hw_tag)); 5062 5063 if (!link->sactive) 5064 ap->nr_active_links++; 5065 link->sactive |= 1 << qc->hw_tag; 5066 } else { 5067 WARN_ON_ONCE(link->sactive); 5068 5069 ap->nr_active_links++; 5070 link->active_tag = qc->tag; 5071 } 5072 5073 qc->flags |= ATA_QCFLAG_ACTIVE; 5074 ap->qc_active |= 1ULL << qc->tag; 5075 5076 /* 5077 * We guarantee to LLDs that they will have at least one 5078 * non-zero sg if the command is a data command. 5079 */ 5080 if (ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes)) 5081 goto sys_err; 5082 5083 if (ata_is_dma(prot) || (ata_is_pio(prot) && 5084 (ap->flags & ATA_FLAG_PIO_DMA))) 5085 if (ata_sg_setup(qc)) 5086 goto sys_err; 5087 5088 /* if device is sleeping, schedule reset and abort the link */ 5089 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) { 5090 link->eh_info.action |= ATA_EH_RESET; 5091 ata_ehi_push_desc(&link->eh_info, "waking up from sleep"); 5092 ata_link_abort(link); 5093 return; 5094 } 5095 5096 if (ap->ops->qc_prep) { 5097 trace_ata_qc_prep(qc); 5098 qc->err_mask |= ap->ops->qc_prep(qc); 5099 if (unlikely(qc->err_mask)) 5100 goto err; 5101 } 5102 5103 trace_ata_qc_issue(qc); 5104 qc->err_mask |= ap->ops->qc_issue(qc); 5105 if (unlikely(qc->err_mask)) 5106 goto err; 5107 return; 5108 5109 sys_err: 5110 qc->err_mask |= AC_ERR_SYSTEM; 5111 err: 5112 ata_qc_complete(qc); 5113 } 5114 5115 /** 5116 * ata_phys_link_online - test whether the given link is online 5117 * @link: ATA link to test 5118 * 5119 * Test whether @link is online. Note that this function returns 5120 * 0 if online status of @link cannot be obtained, so 5121 * ata_link_online(link) != !ata_link_offline(link). 5122 * 5123 * LOCKING: 5124 * None. 5125 * 5126 * RETURNS: 5127 * True if the port online status is available and online. 5128 */ 5129 bool ata_phys_link_online(struct ata_link *link) 5130 { 5131 u32 sstatus; 5132 5133 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && 5134 ata_sstatus_online(sstatus)) 5135 return true; 5136 return false; 5137 } 5138 5139 /** 5140 * ata_phys_link_offline - test whether the given link is offline 5141 * @link: ATA link to test 5142 * 5143 * Test whether @link is offline. Note that this function 5144 * returns 0 if offline status of @link cannot be obtained, so 5145 * ata_link_online(link) != !ata_link_offline(link). 5146 * 5147 * LOCKING: 5148 * None. 5149 * 5150 * RETURNS: 5151 * True if the port offline status is available and offline. 5152 */ 5153 bool ata_phys_link_offline(struct ata_link *link) 5154 { 5155 u32 sstatus; 5156 5157 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && 5158 !ata_sstatus_online(sstatus)) 5159 return true; 5160 return false; 5161 } 5162 5163 /** 5164 * ata_link_online - test whether the given link is online 5165 * @link: ATA link to test 5166 * 5167 * Test whether @link is online. This is identical to 5168 * ata_phys_link_online() when there's no slave link. When 5169 * there's a slave link, this function should only be called on 5170 * the master link and will return true if any of M/S links is 5171 * online. 5172 * 5173 * LOCKING: 5174 * None. 5175 * 5176 * RETURNS: 5177 * True if the port online status is available and online. 5178 */ 5179 bool ata_link_online(struct ata_link *link) 5180 { 5181 struct ata_link *slave = link->ap->slave_link; 5182 5183 WARN_ON(link == slave); /* shouldn't be called on slave link */ 5184 5185 return ata_phys_link_online(link) || 5186 (slave && ata_phys_link_online(slave)); 5187 } 5188 EXPORT_SYMBOL_GPL(ata_link_online); 5189 5190 /** 5191 * ata_link_offline - test whether the given link is offline 5192 * @link: ATA link to test 5193 * 5194 * Test whether @link is offline. This is identical to 5195 * ata_phys_link_offline() when there's no slave link. When 5196 * there's a slave link, this function should only be called on 5197 * the master link and will return true if both M/S links are 5198 * offline. 5199 * 5200 * LOCKING: 5201 * None. 5202 * 5203 * RETURNS: 5204 * True if the port offline status is available and offline. 5205 */ 5206 bool ata_link_offline(struct ata_link *link) 5207 { 5208 struct ata_link *slave = link->ap->slave_link; 5209 5210 WARN_ON(link == slave); /* shouldn't be called on slave link */ 5211 5212 return ata_phys_link_offline(link) && 5213 (!slave || ata_phys_link_offline(slave)); 5214 } 5215 EXPORT_SYMBOL_GPL(ata_link_offline); 5216 5217 #ifdef CONFIG_PM 5218 static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg, 5219 unsigned int action, unsigned int ehi_flags, 5220 bool async) 5221 { 5222 struct ata_link *link; 5223 unsigned long flags; 5224 5225 spin_lock_irqsave(ap->lock, flags); 5226 5227 /* 5228 * A previous PM operation might still be in progress. Wait for 5229 * ATA_PFLAG_PM_PENDING to clear. 5230 */ 5231 if (ap->pflags & ATA_PFLAG_PM_PENDING) { 5232 spin_unlock_irqrestore(ap->lock, flags); 5233 ata_port_wait_eh(ap); 5234 spin_lock_irqsave(ap->lock, flags); 5235 } 5236 5237 /* Request PM operation to EH */ 5238 ap->pm_mesg = mesg; 5239 ap->pflags |= ATA_PFLAG_PM_PENDING; 5240 ata_for_each_link(link, ap, HOST_FIRST) { 5241 link->eh_info.action |= action; 5242 link->eh_info.flags |= ehi_flags; 5243 } 5244 5245 ata_port_schedule_eh(ap); 5246 5247 spin_unlock_irqrestore(ap->lock, flags); 5248 5249 if (!async) 5250 ata_port_wait_eh(ap); 5251 } 5252 5253 static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg, 5254 bool async) 5255 { 5256 /* 5257 * We are about to suspend the port, so we do not care about 5258 * scsi_rescan_device() calls scheduled by previous resume operations. 5259 * The next resume will schedule the rescan again. So cancel any rescan 5260 * that is not done yet. 5261 */ 5262 cancel_delayed_work_sync(&ap->scsi_rescan_task); 5263 5264 /* 5265 * On some hardware, device fails to respond after spun down for 5266 * suspend. As the device will not be used until being resumed, we 5267 * do not need to touch the device. Ask EH to skip the usual stuff 5268 * and proceed directly to suspend. 5269 * 5270 * http://thread.gmane.org/gmane.linux.ide/46764 5271 */ 5272 ata_port_request_pm(ap, mesg, 0, 5273 ATA_EHI_QUIET | ATA_EHI_NO_AUTOPSY | 5274 ATA_EHI_NO_RECOVERY, 5275 async); 5276 } 5277 5278 static int ata_port_pm_suspend(struct device *dev) 5279 { 5280 struct ata_port *ap = to_ata_port(dev); 5281 5282 if (pm_runtime_suspended(dev)) 5283 return 0; 5284 5285 ata_port_suspend(ap, PMSG_SUSPEND, false); 5286 return 0; 5287 } 5288 5289 static int ata_port_pm_freeze(struct device *dev) 5290 { 5291 struct ata_port *ap = to_ata_port(dev); 5292 5293 if (pm_runtime_suspended(dev)) 5294 return 0; 5295 5296 ata_port_suspend(ap, PMSG_FREEZE, false); 5297 return 0; 5298 } 5299 5300 static int ata_port_pm_poweroff(struct device *dev) 5301 { 5302 if (!pm_runtime_suspended(dev)) 5303 ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE, false); 5304 return 0; 5305 } 5306 5307 static void ata_port_resume(struct ata_port *ap, pm_message_t mesg, 5308 bool async) 5309 { 5310 ata_port_request_pm(ap, mesg, ATA_EH_RESET, 5311 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 5312 async); 5313 } 5314 5315 static int ata_port_pm_resume(struct device *dev) 5316 { 5317 if (!pm_runtime_suspended(dev)) 5318 ata_port_resume(to_ata_port(dev), PMSG_RESUME, true); 5319 return 0; 5320 } 5321 5322 /* 5323 * For ODDs, the upper layer will poll for media change every few seconds, 5324 * which will make it enter and leave suspend state every few seconds. And 5325 * as each suspend will cause a hard/soft reset, the gain of runtime suspend 5326 * is very little and the ODD may malfunction after constantly being reset. 5327 * So the idle callback here will not proceed to suspend if a non-ZPODD capable 5328 * ODD is attached to the port. 5329 */ 5330 static int ata_port_runtime_idle(struct device *dev) 5331 { 5332 struct ata_port *ap = to_ata_port(dev); 5333 struct ata_link *link; 5334 struct ata_device *adev; 5335 5336 ata_for_each_link(link, ap, HOST_FIRST) { 5337 ata_for_each_dev(adev, link, ENABLED) 5338 if (adev->class == ATA_DEV_ATAPI && 5339 !zpodd_dev_enabled(adev)) 5340 return -EBUSY; 5341 } 5342 5343 return 0; 5344 } 5345 5346 static int ata_port_runtime_suspend(struct device *dev) 5347 { 5348 ata_port_suspend(to_ata_port(dev), PMSG_AUTO_SUSPEND, false); 5349 return 0; 5350 } 5351 5352 static int ata_port_runtime_resume(struct device *dev) 5353 { 5354 ata_port_resume(to_ata_port(dev), PMSG_AUTO_RESUME, false); 5355 return 0; 5356 } 5357 5358 static const struct dev_pm_ops ata_port_pm_ops = { 5359 .suspend = ata_port_pm_suspend, 5360 .resume = ata_port_pm_resume, 5361 .freeze = ata_port_pm_freeze, 5362 .thaw = ata_port_pm_resume, 5363 .poweroff = ata_port_pm_poweroff, 5364 .restore = ata_port_pm_resume, 5365 5366 .runtime_suspend = ata_port_runtime_suspend, 5367 .runtime_resume = ata_port_runtime_resume, 5368 .runtime_idle = ata_port_runtime_idle, 5369 }; 5370 5371 /* sas ports don't participate in pm runtime management of ata_ports, 5372 * and need to resume ata devices at the domain level, not the per-port 5373 * level. sas suspend/resume is async to allow parallel port recovery 5374 * since sas has multiple ata_port instances per Scsi_Host. 5375 */ 5376 void ata_sas_port_suspend(struct ata_port *ap) 5377 { 5378 ata_port_suspend(ap, PMSG_SUSPEND, true); 5379 } 5380 EXPORT_SYMBOL_GPL(ata_sas_port_suspend); 5381 5382 void ata_sas_port_resume(struct ata_port *ap) 5383 { 5384 ata_port_resume(ap, PMSG_RESUME, true); 5385 } 5386 EXPORT_SYMBOL_GPL(ata_sas_port_resume); 5387 5388 /** 5389 * ata_host_suspend - suspend host 5390 * @host: host to suspend 5391 * @mesg: PM message 5392 * 5393 * Suspend @host. Actual operation is performed by port suspend. 5394 */ 5395 void ata_host_suspend(struct ata_host *host, pm_message_t mesg) 5396 { 5397 host->dev->power.power_state = mesg; 5398 } 5399 EXPORT_SYMBOL_GPL(ata_host_suspend); 5400 5401 /** 5402 * ata_host_resume - resume host 5403 * @host: host to resume 5404 * 5405 * Resume @host. Actual operation is performed by port resume. 5406 */ 5407 void ata_host_resume(struct ata_host *host) 5408 { 5409 host->dev->power.power_state = PMSG_ON; 5410 } 5411 EXPORT_SYMBOL_GPL(ata_host_resume); 5412 #endif 5413 5414 const struct device_type ata_port_type = { 5415 .name = ATA_PORT_TYPE_NAME, 5416 #ifdef CONFIG_PM 5417 .pm = &ata_port_pm_ops, 5418 #endif 5419 }; 5420 5421 /** 5422 * ata_dev_init - Initialize an ata_device structure 5423 * @dev: Device structure to initialize 5424 * 5425 * Initialize @dev in preparation for probing. 5426 * 5427 * LOCKING: 5428 * Inherited from caller. 5429 */ 5430 void ata_dev_init(struct ata_device *dev) 5431 { 5432 struct ata_link *link = ata_dev_phys_link(dev); 5433 struct ata_port *ap = link->ap; 5434 unsigned long flags; 5435 5436 /* SATA spd limit is bound to the attached device, reset together */ 5437 link->sata_spd_limit = link->hw_sata_spd_limit; 5438 link->sata_spd = 0; 5439 5440 /* High bits of dev->flags are used to record warm plug 5441 * requests which occur asynchronously. Synchronize using 5442 * host lock. 5443 */ 5444 spin_lock_irqsave(ap->lock, flags); 5445 dev->flags &= ~ATA_DFLAG_INIT_MASK; 5446 dev->quirks = 0; 5447 spin_unlock_irqrestore(ap->lock, flags); 5448 5449 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0, 5450 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN); 5451 dev->pio_mask = UINT_MAX; 5452 dev->mwdma_mask = UINT_MAX; 5453 dev->udma_mask = UINT_MAX; 5454 } 5455 5456 /** 5457 * ata_link_init - Initialize an ata_link structure 5458 * @ap: ATA port link is attached to 5459 * @link: Link structure to initialize 5460 * @pmp: Port multiplier port number 5461 * 5462 * Initialize @link. 5463 * 5464 * LOCKING: 5465 * Kernel thread context (may sleep) 5466 */ 5467 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) 5468 { 5469 int i; 5470 5471 /* clear everything except for devices */ 5472 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0, 5473 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN); 5474 5475 link->ap = ap; 5476 link->pmp = pmp; 5477 link->active_tag = ATA_TAG_POISON; 5478 link->hw_sata_spd_limit = UINT_MAX; 5479 5480 /* can't use iterator, ap isn't initialized yet */ 5481 for (i = 0; i < ATA_MAX_DEVICES; i++) { 5482 struct ata_device *dev = &link->device[i]; 5483 5484 dev->link = link; 5485 dev->devno = dev - link->device; 5486 #ifdef CONFIG_ATA_ACPI 5487 dev->gtf_filter = ata_acpi_gtf_filter; 5488 #endif 5489 ata_dev_init(dev); 5490 } 5491 } 5492 5493 /** 5494 * sata_link_init_spd - Initialize link->sata_spd_limit 5495 * @link: Link to configure sata_spd_limit for 5496 * 5497 * Initialize ``link->[hw_]sata_spd_limit`` to the currently 5498 * configured value. 5499 * 5500 * LOCKING: 5501 * Kernel thread context (may sleep). 5502 * 5503 * RETURNS: 5504 * 0 on success, -errno on failure. 5505 */ 5506 int sata_link_init_spd(struct ata_link *link) 5507 { 5508 u8 spd; 5509 int rc; 5510 5511 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol); 5512 if (rc) 5513 return rc; 5514 5515 spd = (link->saved_scontrol >> 4) & 0xf; 5516 if (spd) 5517 link->hw_sata_spd_limit &= (1 << spd) - 1; 5518 5519 ata_force_link_limits(link); 5520 5521 link->sata_spd_limit = link->hw_sata_spd_limit; 5522 5523 return 0; 5524 } 5525 5526 /** 5527 * ata_port_alloc - allocate and initialize basic ATA port resources 5528 * @host: ATA host this allocated port belongs to 5529 * 5530 * Allocate and initialize basic ATA port resources. 5531 * 5532 * RETURNS: 5533 * Allocate ATA port on success, NULL on failure. 5534 * 5535 * LOCKING: 5536 * Inherited from calling layer (may sleep). 5537 */ 5538 struct ata_port *ata_port_alloc(struct ata_host *host) 5539 { 5540 struct ata_port *ap; 5541 int id; 5542 5543 ap = kzalloc(sizeof(*ap), GFP_KERNEL); 5544 if (!ap) 5545 return NULL; 5546 5547 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN; 5548 ap->lock = &host->lock; 5549 id = ida_alloc_min(&ata_ida, 1, GFP_KERNEL); 5550 if (id < 0) { 5551 kfree(ap); 5552 return NULL; 5553 } 5554 ap->print_id = id; 5555 ap->host = host; 5556 ap->dev = host->dev; 5557 5558 mutex_init(&ap->scsi_scan_mutex); 5559 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); 5560 INIT_DELAYED_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); 5561 INIT_LIST_HEAD(&ap->eh_done_q); 5562 init_waitqueue_head(&ap->eh_wait_q); 5563 init_completion(&ap->park_req_pending); 5564 timer_setup(&ap->fastdrain_timer, ata_eh_fastdrain_timerfn, 5565 TIMER_DEFERRABLE); 5566 5567 ap->cbl = ATA_CBL_NONE; 5568 5569 ata_link_init(ap, &ap->link, 0); 5570 5571 #ifdef ATA_IRQ_TRAP 5572 ap->stats.unhandled_irq = 1; 5573 ap->stats.idle_irq = 1; 5574 #endif 5575 ata_sff_port_init(ap); 5576 5577 ata_force_pflags(ap); 5578 5579 return ap; 5580 } 5581 EXPORT_SYMBOL_GPL(ata_port_alloc); 5582 5583 void ata_port_free(struct ata_port *ap) 5584 { 5585 if (!ap) 5586 return; 5587 5588 kfree(ap->pmp_link); 5589 kfree(ap->slave_link); 5590 ida_free(&ata_ida, ap->print_id); 5591 kfree(ap); 5592 } 5593 EXPORT_SYMBOL_GPL(ata_port_free); 5594 5595 static void ata_devres_release(struct device *gendev, void *res) 5596 { 5597 struct ata_host *host = dev_get_drvdata(gendev); 5598 int i; 5599 5600 for (i = 0; i < host->n_ports; i++) { 5601 struct ata_port *ap = host->ports[i]; 5602 5603 if (!ap) 5604 continue; 5605 5606 if (ap->scsi_host) 5607 scsi_host_put(ap->scsi_host); 5608 5609 } 5610 5611 dev_set_drvdata(gendev, NULL); 5612 ata_host_put(host); 5613 } 5614 5615 static void ata_host_release(struct kref *kref) 5616 { 5617 struct ata_host *host = container_of(kref, struct ata_host, kref); 5618 int i; 5619 5620 for (i = 0; i < host->n_ports; i++) { 5621 ata_port_free(host->ports[i]); 5622 host->ports[i] = NULL; 5623 } 5624 kfree(host); 5625 } 5626 5627 void ata_host_get(struct ata_host *host) 5628 { 5629 kref_get(&host->kref); 5630 } 5631 5632 void ata_host_put(struct ata_host *host) 5633 { 5634 kref_put(&host->kref, ata_host_release); 5635 } 5636 EXPORT_SYMBOL_GPL(ata_host_put); 5637 5638 /** 5639 * ata_host_alloc - allocate and init basic ATA host resources 5640 * @dev: generic device this host is associated with 5641 * @n_ports: the number of ATA ports associated with this host 5642 * 5643 * Allocate and initialize basic ATA host resources. LLD calls 5644 * this function to allocate a host, initializes it fully and 5645 * attaches it using ata_host_register(). 5646 * 5647 * RETURNS: 5648 * Allocate ATA host on success, NULL on failure. 5649 * 5650 * LOCKING: 5651 * Inherited from calling layer (may sleep). 5652 */ 5653 struct ata_host *ata_host_alloc(struct device *dev, int n_ports) 5654 { 5655 struct ata_host *host; 5656 size_t sz; 5657 int i; 5658 void *dr; 5659 5660 /* alloc a container for our list of ATA ports (buses) */ 5661 sz = sizeof(struct ata_host) + n_ports * sizeof(void *); 5662 host = kzalloc(sz, GFP_KERNEL); 5663 if (!host) 5664 return NULL; 5665 5666 if (!devres_open_group(dev, NULL, GFP_KERNEL)) { 5667 kfree(host); 5668 return NULL; 5669 } 5670 5671 dr = devres_alloc(ata_devres_release, 0, GFP_KERNEL); 5672 if (!dr) { 5673 kfree(host); 5674 goto err_out; 5675 } 5676 5677 devres_add(dev, dr); 5678 dev_set_drvdata(dev, host); 5679 5680 spin_lock_init(&host->lock); 5681 mutex_init(&host->eh_mutex); 5682 host->dev = dev; 5683 host->n_ports = n_ports; 5684 kref_init(&host->kref); 5685 5686 /* allocate ports bound to this host */ 5687 for (i = 0; i < n_ports; i++) { 5688 struct ata_port *ap; 5689 5690 ap = ata_port_alloc(host); 5691 if (!ap) 5692 goto err_out; 5693 5694 ap->port_no = i; 5695 host->ports[i] = ap; 5696 } 5697 5698 devres_remove_group(dev, NULL); 5699 return host; 5700 5701 err_out: 5702 devres_release_group(dev, NULL); 5703 return NULL; 5704 } 5705 EXPORT_SYMBOL_GPL(ata_host_alloc); 5706 5707 /** 5708 * ata_host_alloc_pinfo - alloc host and init with port_info array 5709 * @dev: generic device this host is associated with 5710 * @ppi: array of ATA port_info to initialize host with 5711 * @n_ports: number of ATA ports attached to this host 5712 * 5713 * Allocate ATA host and initialize with info from @ppi. If NULL 5714 * terminated, @ppi may contain fewer entries than @n_ports. The 5715 * last entry will be used for the remaining ports. 5716 * 5717 * RETURNS: 5718 * Allocate ATA host on success, NULL on failure. 5719 * 5720 * LOCKING: 5721 * Inherited from calling layer (may sleep). 5722 */ 5723 struct ata_host *ata_host_alloc_pinfo(struct device *dev, 5724 const struct ata_port_info * const * ppi, 5725 int n_ports) 5726 { 5727 const struct ata_port_info *pi = &ata_dummy_port_info; 5728 struct ata_host *host; 5729 int i, j; 5730 5731 host = ata_host_alloc(dev, n_ports); 5732 if (!host) 5733 return NULL; 5734 5735 for (i = 0, j = 0; i < host->n_ports; i++) { 5736 struct ata_port *ap = host->ports[i]; 5737 5738 if (ppi[j]) 5739 pi = ppi[j++]; 5740 5741 ap->pio_mask = pi->pio_mask; 5742 ap->mwdma_mask = pi->mwdma_mask; 5743 ap->udma_mask = pi->udma_mask; 5744 ap->flags |= pi->flags; 5745 ap->link.flags |= pi->link_flags; 5746 ap->ops = pi->port_ops; 5747 5748 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) 5749 host->ops = pi->port_ops; 5750 } 5751 5752 return host; 5753 } 5754 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); 5755 5756 static void ata_host_stop(struct device *gendev, void *res) 5757 { 5758 struct ata_host *host = dev_get_drvdata(gendev); 5759 int i; 5760 5761 WARN_ON(!(host->flags & ATA_HOST_STARTED)); 5762 5763 for (i = 0; i < host->n_ports; i++) { 5764 struct ata_port *ap = host->ports[i]; 5765 5766 if (ap->ops->port_stop) 5767 ap->ops->port_stop(ap); 5768 } 5769 5770 if (host->ops->host_stop) 5771 host->ops->host_stop(host); 5772 } 5773 5774 /** 5775 * ata_finalize_port_ops - finalize ata_port_operations 5776 * @ops: ata_port_operations to finalize 5777 * 5778 * An ata_port_operations can inherit from another ops and that 5779 * ops can again inherit from another. This can go on as many 5780 * times as necessary as long as there is no loop in the 5781 * inheritance chain. 5782 * 5783 * Ops tables are finalized when the host is started. NULL or 5784 * unspecified entries are inherited from the closet ancestor 5785 * which has the method and the entry is populated with it. 5786 * After finalization, the ops table directly points to all the 5787 * methods and ->inherits is no longer necessary and cleared. 5788 * 5789 * Using ATA_OP_NULL, inheriting ops can force a method to NULL. 5790 * 5791 * LOCKING: 5792 * None. 5793 */ 5794 static void ata_finalize_port_ops(struct ata_port_operations *ops) 5795 { 5796 static DEFINE_SPINLOCK(lock); 5797 const struct ata_port_operations *cur; 5798 void **begin = (void **)ops; 5799 void **end = (void **)&ops->inherits; 5800 void **pp; 5801 5802 if (!ops || !ops->inherits) 5803 return; 5804 5805 spin_lock(&lock); 5806 5807 for (cur = ops->inherits; cur; cur = cur->inherits) { 5808 void **inherit = (void **)cur; 5809 5810 for (pp = begin; pp < end; pp++, inherit++) 5811 if (!*pp) 5812 *pp = *inherit; 5813 } 5814 5815 for (pp = begin; pp < end; pp++) 5816 if (IS_ERR(*pp)) 5817 *pp = NULL; 5818 5819 ops->inherits = NULL; 5820 5821 spin_unlock(&lock); 5822 } 5823 5824 /** 5825 * ata_host_start - start and freeze ports of an ATA host 5826 * @host: ATA host to start ports for 5827 * 5828 * Start and then freeze ports of @host. Started status is 5829 * recorded in host->flags, so this function can be called 5830 * multiple times. Ports are guaranteed to get started only 5831 * once. If host->ops is not initialized yet, it is set to the 5832 * first non-dummy port ops. 5833 * 5834 * LOCKING: 5835 * Inherited from calling layer (may sleep). 5836 * 5837 * RETURNS: 5838 * 0 if all ports are started successfully, -errno otherwise. 5839 */ 5840 int ata_host_start(struct ata_host *host) 5841 { 5842 int have_stop = 0; 5843 void *start_dr = NULL; 5844 int i, rc; 5845 5846 if (host->flags & ATA_HOST_STARTED) 5847 return 0; 5848 5849 ata_finalize_port_ops(host->ops); 5850 5851 for (i = 0; i < host->n_ports; i++) { 5852 struct ata_port *ap = host->ports[i]; 5853 5854 ata_finalize_port_ops(ap->ops); 5855 5856 if (!host->ops && !ata_port_is_dummy(ap)) 5857 host->ops = ap->ops; 5858 5859 if (ap->ops->port_stop) 5860 have_stop = 1; 5861 } 5862 5863 if (host->ops && host->ops->host_stop) 5864 have_stop = 1; 5865 5866 if (have_stop) { 5867 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL); 5868 if (!start_dr) 5869 return -ENOMEM; 5870 } 5871 5872 for (i = 0; i < host->n_ports; i++) { 5873 struct ata_port *ap = host->ports[i]; 5874 5875 if (ap->ops->port_start) { 5876 rc = ap->ops->port_start(ap); 5877 if (rc) { 5878 if (rc != -ENODEV) 5879 dev_err(host->dev, 5880 "failed to start port %d (errno=%d)\n", 5881 i, rc); 5882 goto err_out; 5883 } 5884 } 5885 ata_eh_freeze_port(ap); 5886 } 5887 5888 if (start_dr) 5889 devres_add(host->dev, start_dr); 5890 host->flags |= ATA_HOST_STARTED; 5891 return 0; 5892 5893 err_out: 5894 while (--i >= 0) { 5895 struct ata_port *ap = host->ports[i]; 5896 5897 if (ap->ops->port_stop) 5898 ap->ops->port_stop(ap); 5899 } 5900 devres_free(start_dr); 5901 return rc; 5902 } 5903 EXPORT_SYMBOL_GPL(ata_host_start); 5904 5905 /** 5906 * ata_host_init - Initialize a host struct for sas (ipr, libsas) 5907 * @host: host to initialize 5908 * @dev: device host is attached to 5909 * @ops: port_ops 5910 * 5911 */ 5912 void ata_host_init(struct ata_host *host, struct device *dev, 5913 struct ata_port_operations *ops) 5914 { 5915 spin_lock_init(&host->lock); 5916 mutex_init(&host->eh_mutex); 5917 host->n_tags = ATA_MAX_QUEUE; 5918 host->dev = dev; 5919 host->ops = ops; 5920 kref_init(&host->kref); 5921 } 5922 EXPORT_SYMBOL_GPL(ata_host_init); 5923 5924 void ata_port_probe(struct ata_port *ap) 5925 { 5926 struct ata_eh_info *ehi = &ap->link.eh_info; 5927 unsigned long flags; 5928 5929 ata_acpi_port_power_on(ap); 5930 5931 /* kick EH for boot probing */ 5932 spin_lock_irqsave(ap->lock, flags); 5933 5934 ehi->probe_mask |= ATA_ALL_DEVICES; 5935 ehi->action |= ATA_EH_RESET; 5936 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; 5937 5938 ap->pflags &= ~ATA_PFLAG_INITIALIZING; 5939 ap->pflags |= ATA_PFLAG_LOADING; 5940 ata_port_schedule_eh(ap); 5941 5942 spin_unlock_irqrestore(ap->lock, flags); 5943 } 5944 EXPORT_SYMBOL_GPL(ata_port_probe); 5945 5946 static void async_port_probe(void *data, async_cookie_t cookie) 5947 { 5948 struct ata_port *ap = data; 5949 5950 /* 5951 * If we're not allowed to scan this host in parallel, 5952 * we need to wait until all previous scans have completed 5953 * before going further. 5954 * Jeff Garzik says this is only within a controller, so we 5955 * don't need to wait for port 0, only for later ports. 5956 */ 5957 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0) 5958 async_synchronize_cookie(cookie); 5959 5960 ata_port_probe(ap); 5961 ata_port_wait_eh(ap); 5962 5963 /* in order to keep device order, we need to synchronize at this point */ 5964 async_synchronize_cookie(cookie); 5965 5966 ata_scsi_scan_host(ap, 1); 5967 } 5968 5969 /** 5970 * ata_host_register - register initialized ATA host 5971 * @host: ATA host to register 5972 * @sht: template for SCSI host 5973 * 5974 * Register initialized ATA host. @host is allocated using 5975 * ata_host_alloc() and fully initialized by LLD. This function 5976 * starts ports, registers @host with ATA and SCSI layers and 5977 * probe registered devices. 5978 * 5979 * LOCKING: 5980 * Inherited from calling layer (may sleep). 5981 * 5982 * RETURNS: 5983 * 0 on success, -errno otherwise. 5984 */ 5985 int ata_host_register(struct ata_host *host, const struct scsi_host_template *sht) 5986 { 5987 int i, rc; 5988 5989 host->n_tags = clamp(sht->can_queue, 1, ATA_MAX_QUEUE); 5990 5991 /* host must have been started */ 5992 if (!(host->flags & ATA_HOST_STARTED)) { 5993 dev_err(host->dev, "BUG: trying to register unstarted host\n"); 5994 WARN_ON(1); 5995 return -EINVAL; 5996 } 5997 5998 /* Create associated sysfs transport objects */ 5999 for (i = 0; i < host->n_ports; i++) { 6000 rc = ata_tport_add(host->dev,host->ports[i]); 6001 if (rc) { 6002 goto err_tadd; 6003 } 6004 } 6005 6006 rc = ata_scsi_add_hosts(host, sht); 6007 if (rc) 6008 goto err_tadd; 6009 6010 /* set cable, sata_spd_limit and report */ 6011 for (i = 0; i < host->n_ports; i++) { 6012 struct ata_port *ap = host->ports[i]; 6013 unsigned int xfer_mask; 6014 6015 /* set SATA cable type if still unset */ 6016 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) 6017 ap->cbl = ATA_CBL_SATA; 6018 6019 /* init sata_spd_limit to the current value */ 6020 sata_link_init_spd(&ap->link); 6021 if (ap->slave_link) 6022 sata_link_init_spd(ap->slave_link); 6023 6024 /* print per-port info to dmesg */ 6025 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, 6026 ap->udma_mask); 6027 6028 if (!ata_port_is_dummy(ap)) { 6029 ata_port_info(ap, "%cATA max %s %s\n", 6030 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', 6031 ata_mode_string(xfer_mask), 6032 ap->link.eh_info.desc); 6033 ata_ehi_clear_desc(&ap->link.eh_info); 6034 } else 6035 ata_port_info(ap, "DUMMY\n"); 6036 } 6037 6038 /* perform each probe asynchronously */ 6039 for (i = 0; i < host->n_ports; i++) { 6040 struct ata_port *ap = host->ports[i]; 6041 ap->cookie = async_schedule(async_port_probe, ap); 6042 } 6043 6044 return 0; 6045 6046 err_tadd: 6047 while (--i >= 0) { 6048 ata_tport_delete(host->ports[i]); 6049 } 6050 return rc; 6051 6052 } 6053 EXPORT_SYMBOL_GPL(ata_host_register); 6054 6055 /** 6056 * ata_host_activate - start host, request IRQ and register it 6057 * @host: target ATA host 6058 * @irq: IRQ to request 6059 * @irq_handler: irq_handler used when requesting IRQ 6060 * @irq_flags: irq_flags used when requesting IRQ 6061 * @sht: scsi_host_template to use when registering the host 6062 * 6063 * After allocating an ATA host and initializing it, most libata 6064 * LLDs perform three steps to activate the host - start host, 6065 * request IRQ and register it. This helper takes necessary 6066 * arguments and performs the three steps in one go. 6067 * 6068 * An invalid IRQ skips the IRQ registration and expects the host to 6069 * have set polling mode on the port. In this case, @irq_handler 6070 * should be NULL. 6071 * 6072 * LOCKING: 6073 * Inherited from calling layer (may sleep). 6074 * 6075 * RETURNS: 6076 * 0 on success, -errno otherwise. 6077 */ 6078 int ata_host_activate(struct ata_host *host, int irq, 6079 irq_handler_t irq_handler, unsigned long irq_flags, 6080 const struct scsi_host_template *sht) 6081 { 6082 int i, rc; 6083 char *irq_desc; 6084 6085 rc = ata_host_start(host); 6086 if (rc) 6087 return rc; 6088 6089 /* Special case for polling mode */ 6090 if (!irq) { 6091 WARN_ON(irq_handler); 6092 return ata_host_register(host, sht); 6093 } 6094 6095 irq_desc = devm_kasprintf(host->dev, GFP_KERNEL, "%s[%s]", 6096 dev_driver_string(host->dev), 6097 dev_name(host->dev)); 6098 if (!irq_desc) 6099 return -ENOMEM; 6100 6101 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, 6102 irq_desc, host); 6103 if (rc) 6104 return rc; 6105 6106 for (i = 0; i < host->n_ports; i++) 6107 ata_port_desc_misc(host->ports[i], irq); 6108 6109 rc = ata_host_register(host, sht); 6110 /* if failed, just free the IRQ and leave ports alone */ 6111 if (rc) 6112 devm_free_irq(host->dev, irq, host); 6113 6114 return rc; 6115 } 6116 EXPORT_SYMBOL_GPL(ata_host_activate); 6117 6118 /** 6119 * ata_dev_free_resources - Free a device resources 6120 * @dev: Target ATA device 6121 * 6122 * Free resources allocated to support a device features. 6123 * 6124 * LOCKING: 6125 * Kernel thread context (may sleep). 6126 */ 6127 void ata_dev_free_resources(struct ata_device *dev) 6128 { 6129 if (zpodd_dev_enabled(dev)) 6130 zpodd_exit(dev); 6131 6132 ata_dev_cleanup_cdl_resources(dev); 6133 } 6134 6135 /** 6136 * ata_port_detach - Detach ATA port in preparation of device removal 6137 * @ap: ATA port to be detached 6138 * 6139 * Detach all ATA devices and the associated SCSI devices of @ap; 6140 * then, remove the associated SCSI host. @ap is guaranteed to 6141 * be quiescent on return from this function. 6142 * 6143 * LOCKING: 6144 * Kernel thread context (may sleep). 6145 */ 6146 static void ata_port_detach(struct ata_port *ap) 6147 { 6148 unsigned long flags; 6149 struct ata_link *link; 6150 struct ata_device *dev; 6151 6152 /* Ensure ata_port probe has completed */ 6153 async_synchronize_cookie(ap->cookie + 1); 6154 6155 /* Wait for any ongoing EH */ 6156 ata_port_wait_eh(ap); 6157 6158 mutex_lock(&ap->scsi_scan_mutex); 6159 spin_lock_irqsave(ap->lock, flags); 6160 6161 /* Remove scsi devices */ 6162 ata_for_each_link(link, ap, HOST_FIRST) { 6163 ata_for_each_dev(dev, link, ALL) { 6164 if (dev->sdev) { 6165 spin_unlock_irqrestore(ap->lock, flags); 6166 scsi_remove_device(dev->sdev); 6167 spin_lock_irqsave(ap->lock, flags); 6168 dev->sdev = NULL; 6169 } 6170 } 6171 } 6172 6173 /* Tell EH to disable all devices */ 6174 ap->pflags |= ATA_PFLAG_UNLOADING; 6175 ata_port_schedule_eh(ap); 6176 6177 spin_unlock_irqrestore(ap->lock, flags); 6178 mutex_unlock(&ap->scsi_scan_mutex); 6179 6180 /* wait till EH commits suicide */ 6181 ata_port_wait_eh(ap); 6182 6183 /* it better be dead now */ 6184 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED)); 6185 6186 cancel_delayed_work_sync(&ap->hotplug_task); 6187 cancel_delayed_work_sync(&ap->scsi_rescan_task); 6188 6189 /* Delete port multiplier link transport devices */ 6190 if (ap->pmp_link) { 6191 int i; 6192 6193 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 6194 ata_tlink_delete(&ap->pmp_link[i]); 6195 } 6196 6197 /* Remove the associated SCSI host */ 6198 scsi_remove_host(ap->scsi_host); 6199 ata_tport_delete(ap); 6200 } 6201 6202 /** 6203 * ata_host_detach - Detach all ports of an ATA host 6204 * @host: Host to detach 6205 * 6206 * Detach all ports of @host. 6207 * 6208 * LOCKING: 6209 * Kernel thread context (may sleep). 6210 */ 6211 void ata_host_detach(struct ata_host *host) 6212 { 6213 int i; 6214 6215 for (i = 0; i < host->n_ports; i++) 6216 ata_port_detach(host->ports[i]); 6217 6218 /* the host is dead now, dissociate ACPI */ 6219 ata_acpi_dissociate(host); 6220 } 6221 EXPORT_SYMBOL_GPL(ata_host_detach); 6222 6223 #ifdef CONFIG_PCI 6224 6225 /** 6226 * ata_pci_remove_one - PCI layer callback for device removal 6227 * @pdev: PCI device that was removed 6228 * 6229 * PCI layer indicates to libata via this hook that hot-unplug or 6230 * module unload event has occurred. Detach all ports. Resource 6231 * release is handled via devres. 6232 * 6233 * LOCKING: 6234 * Inherited from PCI layer (may sleep). 6235 */ 6236 void ata_pci_remove_one(struct pci_dev *pdev) 6237 { 6238 struct ata_host *host = pci_get_drvdata(pdev); 6239 6240 ata_host_detach(host); 6241 } 6242 EXPORT_SYMBOL_GPL(ata_pci_remove_one); 6243 6244 void ata_pci_shutdown_one(struct pci_dev *pdev) 6245 { 6246 struct ata_host *host = pci_get_drvdata(pdev); 6247 int i; 6248 6249 for (i = 0; i < host->n_ports; i++) { 6250 struct ata_port *ap = host->ports[i]; 6251 6252 ap->pflags |= ATA_PFLAG_FROZEN; 6253 6254 /* Disable port interrupts */ 6255 if (ap->ops->freeze) 6256 ap->ops->freeze(ap); 6257 6258 /* Stop the port DMA engines */ 6259 if (ap->ops->port_stop) 6260 ap->ops->port_stop(ap); 6261 } 6262 } 6263 EXPORT_SYMBOL_GPL(ata_pci_shutdown_one); 6264 6265 /* move to PCI subsystem */ 6266 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) 6267 { 6268 unsigned long tmp = 0; 6269 6270 switch (bits->width) { 6271 case 1: { 6272 u8 tmp8 = 0; 6273 pci_read_config_byte(pdev, bits->reg, &tmp8); 6274 tmp = tmp8; 6275 break; 6276 } 6277 case 2: { 6278 u16 tmp16 = 0; 6279 pci_read_config_word(pdev, bits->reg, &tmp16); 6280 tmp = tmp16; 6281 break; 6282 } 6283 case 4: { 6284 u32 tmp32 = 0; 6285 pci_read_config_dword(pdev, bits->reg, &tmp32); 6286 tmp = tmp32; 6287 break; 6288 } 6289 6290 default: 6291 return -EINVAL; 6292 } 6293 6294 tmp &= bits->mask; 6295 6296 return (tmp == bits->val) ? 1 : 0; 6297 } 6298 EXPORT_SYMBOL_GPL(pci_test_config_bits); 6299 6300 #ifdef CONFIG_PM 6301 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) 6302 { 6303 pci_save_state(pdev); 6304 pci_disable_device(pdev); 6305 6306 if (mesg.event & PM_EVENT_SLEEP) 6307 pci_set_power_state(pdev, PCI_D3hot); 6308 } 6309 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); 6310 6311 int ata_pci_device_do_resume(struct pci_dev *pdev) 6312 { 6313 int rc; 6314 6315 pci_set_power_state(pdev, PCI_D0); 6316 pci_restore_state(pdev); 6317 6318 rc = pcim_enable_device(pdev); 6319 if (rc) { 6320 dev_err(&pdev->dev, 6321 "failed to enable device after resume (%d)\n", rc); 6322 return rc; 6323 } 6324 6325 pci_set_master(pdev); 6326 return 0; 6327 } 6328 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); 6329 6330 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) 6331 { 6332 struct ata_host *host = pci_get_drvdata(pdev); 6333 6334 ata_host_suspend(host, mesg); 6335 6336 ata_pci_device_do_suspend(pdev, mesg); 6337 6338 return 0; 6339 } 6340 EXPORT_SYMBOL_GPL(ata_pci_device_suspend); 6341 6342 int ata_pci_device_resume(struct pci_dev *pdev) 6343 { 6344 struct ata_host *host = pci_get_drvdata(pdev); 6345 int rc; 6346 6347 rc = ata_pci_device_do_resume(pdev); 6348 if (rc == 0) 6349 ata_host_resume(host); 6350 return rc; 6351 } 6352 EXPORT_SYMBOL_GPL(ata_pci_device_resume); 6353 #endif /* CONFIG_PM */ 6354 #endif /* CONFIG_PCI */ 6355 6356 /** 6357 * ata_platform_remove_one - Platform layer callback for device removal 6358 * @pdev: Platform device that was removed 6359 * 6360 * Platform layer indicates to libata via this hook that hot-unplug or 6361 * module unload event has occurred. Detach all ports. Resource 6362 * release is handled via devres. 6363 * 6364 * LOCKING: 6365 * Inherited from platform layer (may sleep). 6366 */ 6367 void ata_platform_remove_one(struct platform_device *pdev) 6368 { 6369 struct ata_host *host = platform_get_drvdata(pdev); 6370 6371 ata_host_detach(host); 6372 } 6373 EXPORT_SYMBOL_GPL(ata_platform_remove_one); 6374 6375 #ifdef CONFIG_ATA_FORCE 6376 6377 #define force_cbl(name, flag) \ 6378 { #name, .cbl = (flag) } 6379 6380 #define force_spd_limit(spd, val) \ 6381 { #spd, .spd_limit = (val) } 6382 6383 #define force_xfer(mode, shift) \ 6384 { #mode, .xfer_mask = (1UL << (shift)) } 6385 6386 #define force_lflag_on(name, flags) \ 6387 { #name, .lflags_on = (flags) } 6388 6389 #define force_lflag_onoff(name, flags) \ 6390 { "no" #name, .lflags_on = (flags) }, \ 6391 { #name, .lflags_off = (flags) } 6392 6393 #define force_pflag_on(name, flags) \ 6394 { #name, .pflags_on = (flags) } 6395 6396 #define force_quirk_on(name, flag) \ 6397 { #name, .quirk_on = (flag) } 6398 6399 #define force_quirk_onoff(name, flag) \ 6400 { "no" #name, .quirk_on = (flag) }, \ 6401 { #name, .quirk_off = (flag) } 6402 6403 static const struct ata_force_param force_tbl[] __initconst = { 6404 force_cbl(40c, ATA_CBL_PATA40), 6405 force_cbl(80c, ATA_CBL_PATA80), 6406 force_cbl(short40c, ATA_CBL_PATA40_SHORT), 6407 force_cbl(unk, ATA_CBL_PATA_UNK), 6408 force_cbl(ign, ATA_CBL_PATA_IGN), 6409 force_cbl(sata, ATA_CBL_SATA), 6410 6411 force_spd_limit(1.5Gbps, 1), 6412 force_spd_limit(3.0Gbps, 2), 6413 6414 force_xfer(pio0, ATA_SHIFT_PIO + 0), 6415 force_xfer(pio1, ATA_SHIFT_PIO + 1), 6416 force_xfer(pio2, ATA_SHIFT_PIO + 2), 6417 force_xfer(pio3, ATA_SHIFT_PIO + 3), 6418 force_xfer(pio4, ATA_SHIFT_PIO + 4), 6419 force_xfer(pio5, ATA_SHIFT_PIO + 5), 6420 force_xfer(pio6, ATA_SHIFT_PIO + 6), 6421 force_xfer(mwdma0, ATA_SHIFT_MWDMA + 0), 6422 force_xfer(mwdma1, ATA_SHIFT_MWDMA + 1), 6423 force_xfer(mwdma2, ATA_SHIFT_MWDMA + 2), 6424 force_xfer(mwdma3, ATA_SHIFT_MWDMA + 3), 6425 force_xfer(mwdma4, ATA_SHIFT_MWDMA + 4), 6426 force_xfer(udma0, ATA_SHIFT_UDMA + 0), 6427 force_xfer(udma16, ATA_SHIFT_UDMA + 0), 6428 force_xfer(udma/16, ATA_SHIFT_UDMA + 0), 6429 force_xfer(udma1, ATA_SHIFT_UDMA + 1), 6430 force_xfer(udma25, ATA_SHIFT_UDMA + 1), 6431 force_xfer(udma/25, ATA_SHIFT_UDMA + 1), 6432 force_xfer(udma2, ATA_SHIFT_UDMA + 2), 6433 force_xfer(udma33, ATA_SHIFT_UDMA + 2), 6434 force_xfer(udma/33, ATA_SHIFT_UDMA + 2), 6435 force_xfer(udma3, ATA_SHIFT_UDMA + 3), 6436 force_xfer(udma44, ATA_SHIFT_UDMA + 3), 6437 force_xfer(udma/44, ATA_SHIFT_UDMA + 3), 6438 force_xfer(udma4, ATA_SHIFT_UDMA + 4), 6439 force_xfer(udma66, ATA_SHIFT_UDMA + 4), 6440 force_xfer(udma/66, ATA_SHIFT_UDMA + 4), 6441 force_xfer(udma5, ATA_SHIFT_UDMA + 5), 6442 force_xfer(udma100, ATA_SHIFT_UDMA + 5), 6443 force_xfer(udma/100, ATA_SHIFT_UDMA + 5), 6444 force_xfer(udma6, ATA_SHIFT_UDMA + 6), 6445 force_xfer(udma133, ATA_SHIFT_UDMA + 6), 6446 force_xfer(udma/133, ATA_SHIFT_UDMA + 6), 6447 force_xfer(udma7, ATA_SHIFT_UDMA + 7), 6448 6449 force_lflag_on(nohrst, ATA_LFLAG_NO_HRST), 6450 force_lflag_on(nosrst, ATA_LFLAG_NO_SRST), 6451 force_lflag_on(norst, ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST), 6452 force_lflag_on(rstonce, ATA_LFLAG_RST_ONCE), 6453 force_lflag_onoff(dbdelay, ATA_LFLAG_NO_DEBOUNCE_DELAY), 6454 6455 force_pflag_on(external, ATA_PFLAG_EXTERNAL), 6456 6457 force_quirk_onoff(ncq, ATA_QUIRK_NONCQ), 6458 force_quirk_onoff(ncqtrim, ATA_QUIRK_NO_NCQ_TRIM), 6459 force_quirk_onoff(ncqati, ATA_QUIRK_NO_NCQ_ON_ATI), 6460 6461 force_quirk_onoff(trim, ATA_QUIRK_NOTRIM), 6462 force_quirk_on(trim_zero, ATA_QUIRK_ZERO_AFTER_TRIM), 6463 force_quirk_on(max_trim_128m, ATA_QUIRK_MAX_TRIM_128M), 6464 6465 force_quirk_onoff(dma, ATA_QUIRK_NODMA), 6466 force_quirk_on(atapi_dmadir, ATA_QUIRK_ATAPI_DMADIR), 6467 force_quirk_on(atapi_mod16_dma, ATA_QUIRK_ATAPI_MOD16_DMA), 6468 6469 force_quirk_onoff(dmalog, ATA_QUIRK_NO_DMA_LOG), 6470 force_quirk_onoff(iddevlog, ATA_QUIRK_NO_ID_DEV_LOG), 6471 force_quirk_onoff(logdir, ATA_QUIRK_NO_LOG_DIR), 6472 6473 force_quirk_on(max_sec_128, ATA_QUIRK_MAX_SEC_128), 6474 force_quirk_on(max_sec_1024, ATA_QUIRK_MAX_SEC_1024), 6475 force_quirk_on(max_sec_lba48, ATA_QUIRK_MAX_SEC_LBA48), 6476 6477 force_quirk_onoff(lpm, ATA_QUIRK_NOLPM), 6478 force_quirk_onoff(setxfer, ATA_QUIRK_NOSETXFER), 6479 force_quirk_on(dump_id, ATA_QUIRK_DUMP_ID), 6480 force_quirk_onoff(fua, ATA_QUIRK_NO_FUA), 6481 6482 force_quirk_on(disable, ATA_QUIRK_DISABLE), 6483 }; 6484 6485 static int __init ata_parse_force_one(char **cur, 6486 struct ata_force_ent *force_ent, 6487 const char **reason) 6488 { 6489 char *start = *cur, *p = *cur; 6490 char *id, *val, *endp; 6491 const struct ata_force_param *match_fp = NULL; 6492 int nr_matches = 0, i; 6493 6494 /* find where this param ends and update *cur */ 6495 while (*p != '\0' && *p != ',') 6496 p++; 6497 6498 if (*p == '\0') 6499 *cur = p; 6500 else 6501 *cur = p + 1; 6502 6503 *p = '\0'; 6504 6505 /* parse */ 6506 p = strchr(start, ':'); 6507 if (!p) { 6508 val = strstrip(start); 6509 goto parse_val; 6510 } 6511 *p = '\0'; 6512 6513 id = strstrip(start); 6514 val = strstrip(p + 1); 6515 6516 /* parse id */ 6517 p = strchr(id, '.'); 6518 if (p) { 6519 *p++ = '\0'; 6520 force_ent->device = simple_strtoul(p, &endp, 10); 6521 if (p == endp || *endp != '\0') { 6522 *reason = "invalid device"; 6523 return -EINVAL; 6524 } 6525 } 6526 6527 force_ent->port = simple_strtoul(id, &endp, 10); 6528 if (id == endp || *endp != '\0') { 6529 *reason = "invalid port/link"; 6530 return -EINVAL; 6531 } 6532 6533 parse_val: 6534 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */ 6535 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) { 6536 const struct ata_force_param *fp = &force_tbl[i]; 6537 6538 if (strncasecmp(val, fp->name, strlen(val))) 6539 continue; 6540 6541 nr_matches++; 6542 match_fp = fp; 6543 6544 if (strcasecmp(val, fp->name) == 0) { 6545 nr_matches = 1; 6546 break; 6547 } 6548 } 6549 6550 if (!nr_matches) { 6551 *reason = "unknown value"; 6552 return -EINVAL; 6553 } 6554 if (nr_matches > 1) { 6555 *reason = "ambiguous value"; 6556 return -EINVAL; 6557 } 6558 6559 force_ent->param = *match_fp; 6560 6561 return 0; 6562 } 6563 6564 static void __init ata_parse_force_param(void) 6565 { 6566 int idx = 0, size = 1; 6567 int last_port = -1, last_device = -1; 6568 char *p, *cur, *next; 6569 6570 /* Calculate maximum number of params and allocate ata_force_tbl */ 6571 for (p = ata_force_param_buf; *p; p++) 6572 if (*p == ',') 6573 size++; 6574 6575 ata_force_tbl = kcalloc(size, sizeof(ata_force_tbl[0]), GFP_KERNEL); 6576 if (!ata_force_tbl) { 6577 printk(KERN_WARNING "ata: failed to extend force table, " 6578 "libata.force ignored\n"); 6579 return; 6580 } 6581 6582 /* parse and populate the table */ 6583 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) { 6584 const char *reason = ""; 6585 struct ata_force_ent te = { .port = -1, .device = -1 }; 6586 6587 next = cur; 6588 if (ata_parse_force_one(&next, &te, &reason)) { 6589 printk(KERN_WARNING "ata: failed to parse force " 6590 "parameter \"%s\" (%s)\n", 6591 cur, reason); 6592 continue; 6593 } 6594 6595 if (te.port == -1) { 6596 te.port = last_port; 6597 te.device = last_device; 6598 } 6599 6600 ata_force_tbl[idx++] = te; 6601 6602 last_port = te.port; 6603 last_device = te.device; 6604 } 6605 6606 ata_force_tbl_size = idx; 6607 } 6608 6609 static void ata_free_force_param(void) 6610 { 6611 kfree(ata_force_tbl); 6612 } 6613 #else 6614 static inline void ata_parse_force_param(void) { } 6615 static inline void ata_free_force_param(void) { } 6616 #endif 6617 6618 static int __init ata_init(void) 6619 { 6620 int rc; 6621 6622 ata_parse_force_param(); 6623 6624 rc = ata_sff_init(); 6625 if (rc) { 6626 ata_free_force_param(); 6627 return rc; 6628 } 6629 6630 libata_transport_init(); 6631 ata_scsi_transport_template = ata_attach_transport(); 6632 if (!ata_scsi_transport_template) { 6633 ata_sff_exit(); 6634 rc = -ENOMEM; 6635 goto err_out; 6636 } 6637 6638 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); 6639 return 0; 6640 6641 err_out: 6642 return rc; 6643 } 6644 6645 static void __exit ata_exit(void) 6646 { 6647 ata_release_transport(ata_scsi_transport_template); 6648 libata_transport_exit(); 6649 ata_sff_exit(); 6650 ata_free_force_param(); 6651 } 6652 6653 subsys_initcall(ata_init); 6654 module_exit(ata_exit); 6655 6656 static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1); 6657 6658 int ata_ratelimit(void) 6659 { 6660 return __ratelimit(&ratelimit); 6661 } 6662 EXPORT_SYMBOL_GPL(ata_ratelimit); 6663 6664 /** 6665 * ata_msleep - ATA EH owner aware msleep 6666 * @ap: ATA port to attribute the sleep to 6667 * @msecs: duration to sleep in milliseconds 6668 * 6669 * Sleeps @msecs. If the current task is owner of @ap's EH, the 6670 * ownership is released before going to sleep and reacquired 6671 * after the sleep is complete. IOW, other ports sharing the 6672 * @ap->host will be allowed to own the EH while this task is 6673 * sleeping. 6674 * 6675 * LOCKING: 6676 * Might sleep. 6677 */ 6678 void ata_msleep(struct ata_port *ap, unsigned int msecs) 6679 { 6680 bool owns_eh = ap && ap->host->eh_owner == current; 6681 6682 if (owns_eh) 6683 ata_eh_release(ap); 6684 6685 if (msecs < 20) { 6686 unsigned long usecs = msecs * USEC_PER_MSEC; 6687 usleep_range(usecs, usecs + 50); 6688 } else { 6689 msleep(msecs); 6690 } 6691 6692 if (owns_eh) 6693 ata_eh_acquire(ap); 6694 } 6695 EXPORT_SYMBOL_GPL(ata_msleep); 6696 6697 /** 6698 * ata_wait_register - wait until register value changes 6699 * @ap: ATA port to wait register for, can be NULL 6700 * @reg: IO-mapped register 6701 * @mask: Mask to apply to read register value 6702 * @val: Wait condition 6703 * @interval: polling interval in milliseconds 6704 * @timeout: timeout in milliseconds 6705 * 6706 * Waiting for some bits of register to change is a common 6707 * operation for ATA controllers. This function reads 32bit LE 6708 * IO-mapped register @reg and tests for the following condition. 6709 * 6710 * (*@reg & mask) != val 6711 * 6712 * If the condition is met, it returns; otherwise, the process is 6713 * repeated after @interval_msec until timeout. 6714 * 6715 * LOCKING: 6716 * Kernel thread context (may sleep) 6717 * 6718 * RETURNS: 6719 * The final register value. 6720 */ 6721 u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val, 6722 unsigned int interval, unsigned int timeout) 6723 { 6724 unsigned long deadline; 6725 u32 tmp; 6726 6727 tmp = ioread32(reg); 6728 6729 /* Calculate timeout _after_ the first read to make sure 6730 * preceding writes reach the controller before starting to 6731 * eat away the timeout. 6732 */ 6733 deadline = ata_deadline(jiffies, timeout); 6734 6735 while ((tmp & mask) == val && time_before(jiffies, deadline)) { 6736 ata_msleep(ap, interval); 6737 tmp = ioread32(reg); 6738 } 6739 6740 return tmp; 6741 } 6742 EXPORT_SYMBOL_GPL(ata_wait_register); 6743 6744 /* 6745 * Dummy port_ops 6746 */ 6747 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) 6748 { 6749 return AC_ERR_SYSTEM; 6750 } 6751 6752 static void ata_dummy_error_handler(struct ata_port *ap) 6753 { 6754 /* truly dummy */ 6755 } 6756 6757 struct ata_port_operations ata_dummy_port_ops = { 6758 .qc_issue = ata_dummy_qc_issue, 6759 .error_handler = ata_dummy_error_handler, 6760 .sched_eh = ata_std_sched_eh, 6761 .end_eh = ata_std_end_eh, 6762 }; 6763 EXPORT_SYMBOL_GPL(ata_dummy_port_ops); 6764 6765 const struct ata_port_info ata_dummy_port_info = { 6766 .port_ops = &ata_dummy_port_ops, 6767 }; 6768 EXPORT_SYMBOL_GPL(ata_dummy_port_info); 6769 6770 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_tf_load); 6771 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_exec_command); 6772 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_setup); 6773 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_start); 6774 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_status); 6775