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 <asm/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 .prereset = ata_std_prereset, 69 .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 const struct ata_port_operations sata_port_ops = { 76 .inherits = &ata_base_port_ops, 77 78 .qc_defer = ata_std_qc_defer, 79 .hardreset = sata_std_hardreset, 80 }; 81 EXPORT_SYMBOL_GPL(sata_port_ops); 82 83 static unsigned int ata_dev_init_params(struct ata_device *dev, 84 u16 heads, u16 sectors); 85 static unsigned int ata_dev_set_xfermode(struct ata_device *dev); 86 static void ata_dev_xfermask(struct ata_device *dev); 87 static unsigned long ata_dev_blacklisted(const struct ata_device *dev); 88 89 atomic_t ata_print_id = ATOMIC_INIT(0); 90 91 #ifdef CONFIG_ATA_FORCE 92 struct ata_force_param { 93 const char *name; 94 u8 cbl; 95 u8 spd_limit; 96 unsigned int xfer_mask; 97 unsigned int horkage_on; 98 unsigned int horkage_off; 99 u16 lflags_on; 100 u16 lflags_off; 101 }; 102 103 struct ata_force_ent { 104 int port; 105 int device; 106 struct ata_force_param param; 107 }; 108 109 static struct ata_force_ent *ata_force_tbl; 110 static int ata_force_tbl_size; 111 112 static char ata_force_param_buf[COMMAND_LINE_SIZE] __initdata; 113 /* param_buf is thrown away after initialization, disallow read */ 114 module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0); 115 MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/admin-guide/kernel-parameters.rst for details)"); 116 #endif 117 118 static int atapi_enabled = 1; 119 module_param(atapi_enabled, int, 0444); 120 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])"); 121 122 static int atapi_dmadir = 0; 123 module_param(atapi_dmadir, int, 0444); 124 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)"); 125 126 int atapi_passthru16 = 1; 127 module_param(atapi_passthru16, int, 0444); 128 MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])"); 129 130 int libata_fua = 0; 131 module_param_named(fua, libata_fua, int, 0444); 132 MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)"); 133 134 static int ata_ignore_hpa; 135 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); 136 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); 137 138 static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; 139 module_param_named(dma, libata_dma_mask, int, 0444); 140 MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); 141 142 static int ata_probe_timeout; 143 module_param(ata_probe_timeout, int, 0444); 144 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); 145 146 int libata_noacpi = 0; 147 module_param_named(noacpi, libata_noacpi, int, 0444); 148 MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)"); 149 150 int libata_allow_tpm = 0; 151 module_param_named(allow_tpm, libata_allow_tpm, int, 0444); 152 MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)"); 153 154 static int atapi_an; 155 module_param(atapi_an, int, 0444); 156 MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)"); 157 158 MODULE_AUTHOR("Jeff Garzik"); 159 MODULE_DESCRIPTION("Library module for ATA devices"); 160 MODULE_LICENSE("GPL"); 161 MODULE_VERSION(DRV_VERSION); 162 163 static inline bool ata_dev_print_info(struct ata_device *dev) 164 { 165 struct ata_eh_context *ehc = &dev->link->eh_context; 166 167 return ehc->i.flags & ATA_EHI_PRINTINFO; 168 } 169 170 static bool ata_sstatus_online(u32 sstatus) 171 { 172 return (sstatus & 0xf) == 0x3; 173 } 174 175 /** 176 * ata_link_next - link iteration helper 177 * @link: the previous link, NULL to start 178 * @ap: ATA port containing links to iterate 179 * @mode: iteration mode, one of ATA_LITER_* 180 * 181 * LOCKING: 182 * Host lock or EH context. 183 * 184 * RETURNS: 185 * Pointer to the next link. 186 */ 187 struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap, 188 enum ata_link_iter_mode mode) 189 { 190 BUG_ON(mode != ATA_LITER_EDGE && 191 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST); 192 193 /* NULL link indicates start of iteration */ 194 if (!link) 195 switch (mode) { 196 case ATA_LITER_EDGE: 197 case ATA_LITER_PMP_FIRST: 198 if (sata_pmp_attached(ap)) 199 return ap->pmp_link; 200 fallthrough; 201 case ATA_LITER_HOST_FIRST: 202 return &ap->link; 203 } 204 205 /* we just iterated over the host link, what's next? */ 206 if (link == &ap->link) 207 switch (mode) { 208 case ATA_LITER_HOST_FIRST: 209 if (sata_pmp_attached(ap)) 210 return ap->pmp_link; 211 fallthrough; 212 case ATA_LITER_PMP_FIRST: 213 if (unlikely(ap->slave_link)) 214 return ap->slave_link; 215 fallthrough; 216 case ATA_LITER_EDGE: 217 return NULL; 218 } 219 220 /* slave_link excludes PMP */ 221 if (unlikely(link == ap->slave_link)) 222 return NULL; 223 224 /* we were over a PMP link */ 225 if (++link < ap->pmp_link + ap->nr_pmp_links) 226 return link; 227 228 if (mode == ATA_LITER_PMP_FIRST) 229 return &ap->link; 230 231 return NULL; 232 } 233 EXPORT_SYMBOL_GPL(ata_link_next); 234 235 /** 236 * ata_dev_next - device iteration helper 237 * @dev: the previous device, NULL to start 238 * @link: ATA link containing devices to iterate 239 * @mode: iteration mode, one of ATA_DITER_* 240 * 241 * LOCKING: 242 * Host lock or EH context. 243 * 244 * RETURNS: 245 * Pointer to the next device. 246 */ 247 struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link, 248 enum ata_dev_iter_mode mode) 249 { 250 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE && 251 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE); 252 253 /* NULL dev indicates start of iteration */ 254 if (!dev) 255 switch (mode) { 256 case ATA_DITER_ENABLED: 257 case ATA_DITER_ALL: 258 dev = link->device; 259 goto check; 260 case ATA_DITER_ENABLED_REVERSE: 261 case ATA_DITER_ALL_REVERSE: 262 dev = link->device + ata_link_max_devices(link) - 1; 263 goto check; 264 } 265 266 next: 267 /* move to the next one */ 268 switch (mode) { 269 case ATA_DITER_ENABLED: 270 case ATA_DITER_ALL: 271 if (++dev < link->device + ata_link_max_devices(link)) 272 goto check; 273 return NULL; 274 case ATA_DITER_ENABLED_REVERSE: 275 case ATA_DITER_ALL_REVERSE: 276 if (--dev >= link->device) 277 goto check; 278 return NULL; 279 } 280 281 check: 282 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) && 283 !ata_dev_enabled(dev)) 284 goto next; 285 return dev; 286 } 287 EXPORT_SYMBOL_GPL(ata_dev_next); 288 289 /** 290 * ata_dev_phys_link - find physical link for a device 291 * @dev: ATA device to look up physical link for 292 * 293 * Look up physical link which @dev is attached to. Note that 294 * this is different from @dev->link only when @dev is on slave 295 * link. For all other cases, it's the same as @dev->link. 296 * 297 * LOCKING: 298 * Don't care. 299 * 300 * RETURNS: 301 * Pointer to the found physical link. 302 */ 303 struct ata_link *ata_dev_phys_link(struct ata_device *dev) 304 { 305 struct ata_port *ap = dev->link->ap; 306 307 if (!ap->slave_link) 308 return dev->link; 309 if (!dev->devno) 310 return &ap->link; 311 return ap->slave_link; 312 } 313 314 #ifdef CONFIG_ATA_FORCE 315 /** 316 * ata_force_cbl - force cable type according to libata.force 317 * @ap: ATA port of interest 318 * 319 * Force cable type according to libata.force and whine about it. 320 * The last entry which has matching port number is used, so it 321 * can be specified as part of device force parameters. For 322 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the 323 * same effect. 324 * 325 * LOCKING: 326 * EH context. 327 */ 328 void ata_force_cbl(struct ata_port *ap) 329 { 330 int i; 331 332 for (i = ata_force_tbl_size - 1; i >= 0; i--) { 333 const struct ata_force_ent *fe = &ata_force_tbl[i]; 334 335 if (fe->port != -1 && fe->port != ap->print_id) 336 continue; 337 338 if (fe->param.cbl == ATA_CBL_NONE) 339 continue; 340 341 ap->cbl = fe->param.cbl; 342 ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name); 343 return; 344 } 345 } 346 347 /** 348 * ata_force_link_limits - force link limits according to libata.force 349 * @link: ATA link of interest 350 * 351 * Force link flags and SATA spd limit according to libata.force 352 * and whine about it. When only the port part is specified 353 * (e.g. 1:), the limit applies to all links connected to both 354 * the host link and all fan-out ports connected via PMP. If the 355 * device part is specified as 0 (e.g. 1.00:), it specifies the 356 * first fan-out link not the host link. Device number 15 always 357 * points to the host link whether PMP is attached or not. If the 358 * controller has slave link, device number 16 points to it. 359 * 360 * LOCKING: 361 * EH context. 362 */ 363 static void ata_force_link_limits(struct ata_link *link) 364 { 365 bool did_spd = false; 366 int linkno = link->pmp; 367 int i; 368 369 if (ata_is_host_link(link)) 370 linkno += 15; 371 372 for (i = ata_force_tbl_size - 1; i >= 0; i--) { 373 const struct ata_force_ent *fe = &ata_force_tbl[i]; 374 375 if (fe->port != -1 && fe->port != link->ap->print_id) 376 continue; 377 378 if (fe->device != -1 && fe->device != linkno) 379 continue; 380 381 /* only honor the first spd limit */ 382 if (!did_spd && fe->param.spd_limit) { 383 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1; 384 ata_link_notice(link, "FORCE: PHY spd limit set to %s\n", 385 fe->param.name); 386 did_spd = true; 387 } 388 389 /* let lflags stack */ 390 if (fe->param.lflags_on) { 391 link->flags |= fe->param.lflags_on; 392 ata_link_notice(link, 393 "FORCE: link flag 0x%x forced -> 0x%x\n", 394 fe->param.lflags_on, link->flags); 395 } 396 if (fe->param.lflags_off) { 397 link->flags &= ~fe->param.lflags_off; 398 ata_link_notice(link, 399 "FORCE: link flag 0x%x cleared -> 0x%x\n", 400 fe->param.lflags_off, link->flags); 401 } 402 } 403 } 404 405 /** 406 * ata_force_xfermask - force xfermask according to libata.force 407 * @dev: ATA device of interest 408 * 409 * Force xfer_mask according to libata.force and whine about it. 410 * For consistency with link selection, device number 15 selects 411 * the first device connected to the host link. 412 * 413 * LOCKING: 414 * EH context. 415 */ 416 static void ata_force_xfermask(struct ata_device *dev) 417 { 418 int devno = dev->link->pmp + dev->devno; 419 int alt_devno = devno; 420 int i; 421 422 /* allow n.15/16 for devices attached to host port */ 423 if (ata_is_host_link(dev->link)) 424 alt_devno += 15; 425 426 for (i = ata_force_tbl_size - 1; i >= 0; i--) { 427 const struct ata_force_ent *fe = &ata_force_tbl[i]; 428 unsigned int pio_mask, mwdma_mask, udma_mask; 429 430 if (fe->port != -1 && fe->port != dev->link->ap->print_id) 431 continue; 432 433 if (fe->device != -1 && fe->device != devno && 434 fe->device != alt_devno) 435 continue; 436 437 if (!fe->param.xfer_mask) 438 continue; 439 440 ata_unpack_xfermask(fe->param.xfer_mask, 441 &pio_mask, &mwdma_mask, &udma_mask); 442 if (udma_mask) 443 dev->udma_mask = udma_mask; 444 else if (mwdma_mask) { 445 dev->udma_mask = 0; 446 dev->mwdma_mask = mwdma_mask; 447 } else { 448 dev->udma_mask = 0; 449 dev->mwdma_mask = 0; 450 dev->pio_mask = pio_mask; 451 } 452 453 ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n", 454 fe->param.name); 455 return; 456 } 457 } 458 459 /** 460 * ata_force_horkage - force horkage according to libata.force 461 * @dev: ATA device of interest 462 * 463 * Force horkage according to libata.force and whine about it. 464 * For consistency with link selection, device number 15 selects 465 * the first device connected to the host link. 466 * 467 * LOCKING: 468 * EH context. 469 */ 470 static void ata_force_horkage(struct ata_device *dev) 471 { 472 int devno = dev->link->pmp + dev->devno; 473 int alt_devno = devno; 474 int i; 475 476 /* allow n.15/16 for devices attached to host port */ 477 if (ata_is_host_link(dev->link)) 478 alt_devno += 15; 479 480 for (i = 0; i < ata_force_tbl_size; i++) { 481 const struct ata_force_ent *fe = &ata_force_tbl[i]; 482 483 if (fe->port != -1 && fe->port != dev->link->ap->print_id) 484 continue; 485 486 if (fe->device != -1 && fe->device != devno && 487 fe->device != alt_devno) 488 continue; 489 490 if (!(~dev->horkage & fe->param.horkage_on) && 491 !(dev->horkage & fe->param.horkage_off)) 492 continue; 493 494 dev->horkage |= fe->param.horkage_on; 495 dev->horkage &= ~fe->param.horkage_off; 496 497 ata_dev_notice(dev, "FORCE: horkage modified (%s)\n", 498 fe->param.name); 499 } 500 } 501 #else 502 static inline void ata_force_link_limits(struct ata_link *link) { } 503 static inline void ata_force_xfermask(struct ata_device *dev) { } 504 static inline void ata_force_horkage(struct ata_device *dev) { } 505 #endif 506 507 /** 508 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode 509 * @opcode: SCSI opcode 510 * 511 * Determine ATAPI command type from @opcode. 512 * 513 * LOCKING: 514 * None. 515 * 516 * RETURNS: 517 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC} 518 */ 519 int atapi_cmd_type(u8 opcode) 520 { 521 switch (opcode) { 522 case GPCMD_READ_10: 523 case GPCMD_READ_12: 524 return ATAPI_READ; 525 526 case GPCMD_WRITE_10: 527 case GPCMD_WRITE_12: 528 case GPCMD_WRITE_AND_VERIFY_10: 529 return ATAPI_WRITE; 530 531 case GPCMD_READ_CD: 532 case GPCMD_READ_CD_MSF: 533 return ATAPI_READ_CD; 534 535 case ATA_16: 536 case ATA_12: 537 if (atapi_passthru16) 538 return ATAPI_PASS_THRU; 539 fallthrough; 540 default: 541 return ATAPI_MISC; 542 } 543 } 544 EXPORT_SYMBOL_GPL(atapi_cmd_type); 545 546 static const u8 ata_rw_cmds[] = { 547 /* pio multi */ 548 ATA_CMD_READ_MULTI, 549 ATA_CMD_WRITE_MULTI, 550 ATA_CMD_READ_MULTI_EXT, 551 ATA_CMD_WRITE_MULTI_EXT, 552 0, 553 0, 554 0, 555 0, 556 /* pio */ 557 ATA_CMD_PIO_READ, 558 ATA_CMD_PIO_WRITE, 559 ATA_CMD_PIO_READ_EXT, 560 ATA_CMD_PIO_WRITE_EXT, 561 0, 562 0, 563 0, 564 0, 565 /* dma */ 566 ATA_CMD_READ, 567 ATA_CMD_WRITE, 568 ATA_CMD_READ_EXT, 569 ATA_CMD_WRITE_EXT, 570 0, 571 0, 572 0, 573 ATA_CMD_WRITE_FUA_EXT 574 }; 575 576 /** 577 * ata_set_rwcmd_protocol - set taskfile r/w command and protocol 578 * @dev: target device for the taskfile 579 * @tf: taskfile to examine and configure 580 * 581 * Examine the device configuration and tf->flags to determine 582 * the proper read/write command and protocol to use for @tf. 583 * 584 * LOCKING: 585 * caller. 586 */ 587 static bool ata_set_rwcmd_protocol(struct ata_device *dev, 588 struct ata_taskfile *tf) 589 { 590 u8 cmd; 591 592 int index, fua, lba48, write; 593 594 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; 595 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; 596 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; 597 598 if (dev->flags & ATA_DFLAG_PIO) { 599 tf->protocol = ATA_PROT_PIO; 600 index = dev->multi_count ? 0 : 8; 601 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { 602 /* Unable to use DMA due to host limitation */ 603 tf->protocol = ATA_PROT_PIO; 604 index = dev->multi_count ? 0 : 8; 605 } else { 606 tf->protocol = ATA_PROT_DMA; 607 index = 16; 608 } 609 610 cmd = ata_rw_cmds[index + fua + lba48 + write]; 611 if (!cmd) 612 return false; 613 614 tf->command = cmd; 615 616 return true; 617 } 618 619 /** 620 * ata_tf_read_block - Read block address from ATA taskfile 621 * @tf: ATA taskfile of interest 622 * @dev: ATA device @tf belongs to 623 * 624 * LOCKING: 625 * None. 626 * 627 * Read block address from @tf. This function can handle all 628 * three address formats - LBA, LBA48 and CHS. tf->protocol and 629 * flags select the address format to use. 630 * 631 * RETURNS: 632 * Block address read from @tf. 633 */ 634 u64 ata_tf_read_block(const struct ata_taskfile *tf, struct ata_device *dev) 635 { 636 u64 block = 0; 637 638 if (tf->flags & ATA_TFLAG_LBA) { 639 if (tf->flags & ATA_TFLAG_LBA48) { 640 block |= (u64)tf->hob_lbah << 40; 641 block |= (u64)tf->hob_lbam << 32; 642 block |= (u64)tf->hob_lbal << 24; 643 } else 644 block |= (tf->device & 0xf) << 24; 645 646 block |= tf->lbah << 16; 647 block |= tf->lbam << 8; 648 block |= tf->lbal; 649 } else { 650 u32 cyl, head, sect; 651 652 cyl = tf->lbam | (tf->lbah << 8); 653 head = tf->device & 0xf; 654 sect = tf->lbal; 655 656 if (!sect) { 657 ata_dev_warn(dev, 658 "device reported invalid CHS sector 0\n"); 659 return U64_MAX; 660 } 661 662 block = (cyl * dev->heads + head) * dev->sectors + sect - 1; 663 } 664 665 return block; 666 } 667 668 /* 669 * Set a taskfile command duration limit index. 670 */ 671 static inline void ata_set_tf_cdl(struct ata_queued_cmd *qc, int cdl) 672 { 673 struct ata_taskfile *tf = &qc->tf; 674 675 if (tf->protocol == ATA_PROT_NCQ) 676 tf->auxiliary |= cdl; 677 else 678 tf->feature |= cdl; 679 680 /* 681 * Mark this command as having a CDL and request the result 682 * task file so that we can inspect the sense data available 683 * bit on completion. 684 */ 685 qc->flags |= ATA_QCFLAG_HAS_CDL | ATA_QCFLAG_RESULT_TF; 686 } 687 688 /** 689 * ata_build_rw_tf - Build ATA taskfile for given read/write request 690 * @qc: Metadata associated with the taskfile to build 691 * @block: Block address 692 * @n_block: Number of blocks 693 * @tf_flags: RW/FUA etc... 694 * @cdl: Command duration limit index 695 * @class: IO priority class 696 * 697 * LOCKING: 698 * None. 699 * 700 * Build ATA taskfile for the command @qc for read/write request described 701 * by @block, @n_block, @tf_flags and @class. 702 * 703 * RETURNS: 704 * 705 * 0 on success, -ERANGE if the request is too large for @dev, 706 * -EINVAL if the request is invalid. 707 */ 708 int ata_build_rw_tf(struct ata_queued_cmd *qc, u64 block, u32 n_block, 709 unsigned int tf_flags, int cdl, int class) 710 { 711 struct ata_taskfile *tf = &qc->tf; 712 struct ata_device *dev = qc->dev; 713 714 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 715 tf->flags |= tf_flags; 716 717 if (ata_ncq_enabled(dev)) { 718 /* yay, NCQ */ 719 if (!lba_48_ok(block, n_block)) 720 return -ERANGE; 721 722 tf->protocol = ATA_PROT_NCQ; 723 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; 724 725 if (tf->flags & ATA_TFLAG_WRITE) 726 tf->command = ATA_CMD_FPDMA_WRITE; 727 else 728 tf->command = ATA_CMD_FPDMA_READ; 729 730 tf->nsect = qc->hw_tag << 3; 731 tf->hob_feature = (n_block >> 8) & 0xff; 732 tf->feature = n_block & 0xff; 733 734 tf->hob_lbah = (block >> 40) & 0xff; 735 tf->hob_lbam = (block >> 32) & 0xff; 736 tf->hob_lbal = (block >> 24) & 0xff; 737 tf->lbah = (block >> 16) & 0xff; 738 tf->lbam = (block >> 8) & 0xff; 739 tf->lbal = block & 0xff; 740 741 tf->device = ATA_LBA; 742 if (tf->flags & ATA_TFLAG_FUA) 743 tf->device |= 1 << 7; 744 745 if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED && 746 class == IOPRIO_CLASS_RT) 747 tf->hob_nsect |= ATA_PRIO_HIGH << ATA_SHIFT_PRIO; 748 749 if ((dev->flags & ATA_DFLAG_CDL_ENABLED) && cdl) 750 ata_set_tf_cdl(qc, cdl); 751 752 } else if (dev->flags & ATA_DFLAG_LBA) { 753 tf->flags |= ATA_TFLAG_LBA; 754 755 if ((dev->flags & ATA_DFLAG_CDL_ENABLED) && cdl) 756 ata_set_tf_cdl(qc, cdl); 757 758 /* Both FUA writes and a CDL index require 48-bit commands */ 759 if (!(tf->flags & ATA_TFLAG_FUA) && 760 !(qc->flags & ATA_QCFLAG_HAS_CDL) && 761 lba_28_ok(block, n_block)) { 762 /* use LBA28 */ 763 tf->device |= (block >> 24) & 0xf; 764 } else if (lba_48_ok(block, n_block)) { 765 if (!(dev->flags & ATA_DFLAG_LBA48)) 766 return -ERANGE; 767 768 /* use LBA48 */ 769 tf->flags |= ATA_TFLAG_LBA48; 770 771 tf->hob_nsect = (n_block >> 8) & 0xff; 772 773 tf->hob_lbah = (block >> 40) & 0xff; 774 tf->hob_lbam = (block >> 32) & 0xff; 775 tf->hob_lbal = (block >> 24) & 0xff; 776 } else { 777 /* request too large even for LBA48 */ 778 return -ERANGE; 779 } 780 781 if (unlikely(!ata_set_rwcmd_protocol(dev, tf))) 782 return -EINVAL; 783 784 tf->nsect = n_block & 0xff; 785 786 tf->lbah = (block >> 16) & 0xff; 787 tf->lbam = (block >> 8) & 0xff; 788 tf->lbal = block & 0xff; 789 790 tf->device |= ATA_LBA; 791 } else { 792 /* CHS */ 793 u32 sect, head, cyl, track; 794 795 /* The request -may- be too large for CHS addressing. */ 796 if (!lba_28_ok(block, n_block)) 797 return -ERANGE; 798 799 if (unlikely(!ata_set_rwcmd_protocol(dev, tf))) 800 return -EINVAL; 801 802 /* Convert LBA to CHS */ 803 track = (u32)block / dev->sectors; 804 cyl = track / dev->heads; 805 head = track % dev->heads; 806 sect = (u32)block % dev->sectors + 1; 807 808 /* Check whether the converted CHS can fit. 809 Cylinder: 0-65535 810 Head: 0-15 811 Sector: 1-255*/ 812 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) 813 return -ERANGE; 814 815 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ 816 tf->lbal = sect; 817 tf->lbam = cyl; 818 tf->lbah = cyl >> 8; 819 tf->device |= head; 820 } 821 822 return 0; 823 } 824 825 /** 826 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask 827 * @pio_mask: pio_mask 828 * @mwdma_mask: mwdma_mask 829 * @udma_mask: udma_mask 830 * 831 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single 832 * unsigned int xfer_mask. 833 * 834 * LOCKING: 835 * None. 836 * 837 * RETURNS: 838 * Packed xfer_mask. 839 */ 840 unsigned int ata_pack_xfermask(unsigned int pio_mask, 841 unsigned int mwdma_mask, 842 unsigned int udma_mask) 843 { 844 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | 845 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | 846 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); 847 } 848 EXPORT_SYMBOL_GPL(ata_pack_xfermask); 849 850 /** 851 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks 852 * @xfer_mask: xfer_mask to unpack 853 * @pio_mask: resulting pio_mask 854 * @mwdma_mask: resulting mwdma_mask 855 * @udma_mask: resulting udma_mask 856 * 857 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. 858 * Any NULL destination masks will be ignored. 859 */ 860 void ata_unpack_xfermask(unsigned int xfer_mask, unsigned int *pio_mask, 861 unsigned int *mwdma_mask, unsigned int *udma_mask) 862 { 863 if (pio_mask) 864 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; 865 if (mwdma_mask) 866 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; 867 if (udma_mask) 868 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; 869 } 870 871 static const struct ata_xfer_ent { 872 int shift, bits; 873 u8 base; 874 } ata_xfer_tbl[] = { 875 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 }, 876 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 }, 877 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 }, 878 { -1, }, 879 }; 880 881 /** 882 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask 883 * @xfer_mask: xfer_mask of interest 884 * 885 * Return matching XFER_* value for @xfer_mask. Only the highest 886 * bit of @xfer_mask is considered. 887 * 888 * LOCKING: 889 * None. 890 * 891 * RETURNS: 892 * Matching XFER_* value, 0xff if no match found. 893 */ 894 u8 ata_xfer_mask2mode(unsigned int xfer_mask) 895 { 896 int highbit = fls(xfer_mask) - 1; 897 const struct ata_xfer_ent *ent; 898 899 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 900 if (highbit >= ent->shift && highbit < ent->shift + ent->bits) 901 return ent->base + highbit - ent->shift; 902 return 0xff; 903 } 904 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode); 905 906 /** 907 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* 908 * @xfer_mode: XFER_* of interest 909 * 910 * Return matching xfer_mask for @xfer_mode. 911 * 912 * LOCKING: 913 * None. 914 * 915 * RETURNS: 916 * Matching xfer_mask, 0 if no match found. 917 */ 918 unsigned int ata_xfer_mode2mask(u8 xfer_mode) 919 { 920 const struct ata_xfer_ent *ent; 921 922 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 923 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 924 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1) 925 & ~((1 << ent->shift) - 1); 926 return 0; 927 } 928 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask); 929 930 /** 931 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* 932 * @xfer_mode: XFER_* of interest 933 * 934 * Return matching xfer_shift for @xfer_mode. 935 * 936 * LOCKING: 937 * None. 938 * 939 * RETURNS: 940 * Matching xfer_shift, -1 if no match found. 941 */ 942 int ata_xfer_mode2shift(u8 xfer_mode) 943 { 944 const struct ata_xfer_ent *ent; 945 946 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 947 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) 948 return ent->shift; 949 return -1; 950 } 951 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift); 952 953 /** 954 * ata_mode_string - convert xfer_mask to string 955 * @xfer_mask: mask of bits supported; only highest bit counts. 956 * 957 * Determine string which represents the highest speed 958 * (highest bit in @modemask). 959 * 960 * LOCKING: 961 * None. 962 * 963 * RETURNS: 964 * Constant C string representing highest speed listed in 965 * @mode_mask, or the constant C string "<n/a>". 966 */ 967 const char *ata_mode_string(unsigned int xfer_mask) 968 { 969 static const char * const xfer_mode_str[] = { 970 "PIO0", 971 "PIO1", 972 "PIO2", 973 "PIO3", 974 "PIO4", 975 "PIO5", 976 "PIO6", 977 "MWDMA0", 978 "MWDMA1", 979 "MWDMA2", 980 "MWDMA3", 981 "MWDMA4", 982 "UDMA/16", 983 "UDMA/25", 984 "UDMA/33", 985 "UDMA/44", 986 "UDMA/66", 987 "UDMA/100", 988 "UDMA/133", 989 "UDMA7", 990 }; 991 int highbit; 992 993 highbit = fls(xfer_mask) - 1; 994 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) 995 return xfer_mode_str[highbit]; 996 return "<n/a>"; 997 } 998 EXPORT_SYMBOL_GPL(ata_mode_string); 999 1000 const char *sata_spd_string(unsigned int spd) 1001 { 1002 static const char * const spd_str[] = { 1003 "1.5 Gbps", 1004 "3.0 Gbps", 1005 "6.0 Gbps", 1006 }; 1007 1008 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) 1009 return "<unknown>"; 1010 return spd_str[spd - 1]; 1011 } 1012 1013 /** 1014 * ata_dev_classify - determine device type based on ATA-spec signature 1015 * @tf: ATA taskfile register set for device to be identified 1016 * 1017 * Determine from taskfile register contents whether a device is 1018 * ATA or ATAPI, as per "Signature and persistence" section 1019 * of ATA/PI spec (volume 1, sect 5.14). 1020 * 1021 * LOCKING: 1022 * None. 1023 * 1024 * RETURNS: 1025 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP, 1026 * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure. 1027 */ 1028 unsigned int ata_dev_classify(const struct ata_taskfile *tf) 1029 { 1030 /* Apple's open source Darwin code hints that some devices only 1031 * put a proper signature into the LBA mid/high registers, 1032 * So, we only check those. It's sufficient for uniqueness. 1033 * 1034 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate 1035 * signatures for ATA and ATAPI devices attached on SerialATA, 1036 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA 1037 * spec has never mentioned about using different signatures 1038 * for ATA/ATAPI devices. Then, Serial ATA II: Port 1039 * Multiplier specification began to use 0x69/0x96 to identify 1040 * port multpliers and 0x3c/0xc3 to identify SEMB device. 1041 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and 1042 * 0x69/0x96 shortly and described them as reserved for 1043 * SerialATA. 1044 * 1045 * We follow the current spec and consider that 0x69/0x96 1046 * identifies a port multiplier and 0x3c/0xc3 a SEMB device. 1047 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports 1048 * SEMB signature. This is worked around in 1049 * ata_dev_read_id(). 1050 */ 1051 if (tf->lbam == 0 && tf->lbah == 0) 1052 return ATA_DEV_ATA; 1053 1054 if (tf->lbam == 0x14 && tf->lbah == 0xeb) 1055 return ATA_DEV_ATAPI; 1056 1057 if (tf->lbam == 0x69 && tf->lbah == 0x96) 1058 return ATA_DEV_PMP; 1059 1060 if (tf->lbam == 0x3c && tf->lbah == 0xc3) 1061 return ATA_DEV_SEMB; 1062 1063 if (tf->lbam == 0xcd && tf->lbah == 0xab) 1064 return ATA_DEV_ZAC; 1065 1066 return ATA_DEV_UNKNOWN; 1067 } 1068 EXPORT_SYMBOL_GPL(ata_dev_classify); 1069 1070 /** 1071 * ata_id_string - Convert IDENTIFY DEVICE page into string 1072 * @id: IDENTIFY DEVICE results we will examine 1073 * @s: string into which data is output 1074 * @ofs: offset into identify device page 1075 * @len: length of string to return. must be an even number. 1076 * 1077 * The strings in the IDENTIFY DEVICE page are broken up into 1078 * 16-bit chunks. Run through the string, and output each 1079 * 8-bit chunk linearly, regardless of platform. 1080 * 1081 * LOCKING: 1082 * caller. 1083 */ 1084 1085 void ata_id_string(const u16 *id, unsigned char *s, 1086 unsigned int ofs, unsigned int len) 1087 { 1088 unsigned int c; 1089 1090 BUG_ON(len & 1); 1091 1092 while (len > 0) { 1093 c = id[ofs] >> 8; 1094 *s = c; 1095 s++; 1096 1097 c = id[ofs] & 0xff; 1098 *s = c; 1099 s++; 1100 1101 ofs++; 1102 len -= 2; 1103 } 1104 } 1105 EXPORT_SYMBOL_GPL(ata_id_string); 1106 1107 /** 1108 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string 1109 * @id: IDENTIFY DEVICE results we will examine 1110 * @s: string into which data is output 1111 * @ofs: offset into identify device page 1112 * @len: length of string to return. must be an odd number. 1113 * 1114 * This function is identical to ata_id_string except that it 1115 * trims trailing spaces and terminates the resulting string with 1116 * null. @len must be actual maximum length (even number) + 1. 1117 * 1118 * LOCKING: 1119 * caller. 1120 */ 1121 void ata_id_c_string(const u16 *id, unsigned char *s, 1122 unsigned int ofs, unsigned int len) 1123 { 1124 unsigned char *p; 1125 1126 ata_id_string(id, s, ofs, len - 1); 1127 1128 p = s + strnlen(s, len - 1); 1129 while (p > s && p[-1] == ' ') 1130 p--; 1131 *p = '\0'; 1132 } 1133 EXPORT_SYMBOL_GPL(ata_id_c_string); 1134 1135 static u64 ata_id_n_sectors(const u16 *id) 1136 { 1137 if (ata_id_has_lba(id)) { 1138 if (ata_id_has_lba48(id)) 1139 return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2); 1140 1141 return ata_id_u32(id, ATA_ID_LBA_CAPACITY); 1142 } 1143 1144 if (ata_id_current_chs_valid(id)) 1145 return (u32)id[ATA_ID_CUR_CYLS] * (u32)id[ATA_ID_CUR_HEADS] * 1146 (u32)id[ATA_ID_CUR_SECTORS]; 1147 1148 return (u32)id[ATA_ID_CYLS] * (u32)id[ATA_ID_HEADS] * 1149 (u32)id[ATA_ID_SECTORS]; 1150 } 1151 1152 u64 ata_tf_to_lba48(const struct ata_taskfile *tf) 1153 { 1154 u64 sectors = 0; 1155 1156 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; 1157 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; 1158 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24; 1159 sectors |= (tf->lbah & 0xff) << 16; 1160 sectors |= (tf->lbam & 0xff) << 8; 1161 sectors |= (tf->lbal & 0xff); 1162 1163 return sectors; 1164 } 1165 1166 u64 ata_tf_to_lba(const struct ata_taskfile *tf) 1167 { 1168 u64 sectors = 0; 1169 1170 sectors |= (tf->device & 0x0f) << 24; 1171 sectors |= (tf->lbah & 0xff) << 16; 1172 sectors |= (tf->lbam & 0xff) << 8; 1173 sectors |= (tf->lbal & 0xff); 1174 1175 return sectors; 1176 } 1177 1178 /** 1179 * ata_read_native_max_address - Read native max address 1180 * @dev: target device 1181 * @max_sectors: out parameter for the result native max address 1182 * 1183 * Perform an LBA48 or LBA28 native size query upon the device in 1184 * question. 1185 * 1186 * RETURNS: 1187 * 0 on success, -EACCES if command is aborted by the drive. 1188 * -EIO on other errors. 1189 */ 1190 static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors) 1191 { 1192 unsigned int err_mask; 1193 struct ata_taskfile tf; 1194 int lba48 = ata_id_has_lba48(dev->id); 1195 1196 ata_tf_init(dev, &tf); 1197 1198 /* always clear all address registers */ 1199 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1200 1201 if (lba48) { 1202 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; 1203 tf.flags |= ATA_TFLAG_LBA48; 1204 } else 1205 tf.command = ATA_CMD_READ_NATIVE_MAX; 1206 1207 tf.protocol = ATA_PROT_NODATA; 1208 tf.device |= ATA_LBA; 1209 1210 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 1211 if (err_mask) { 1212 ata_dev_warn(dev, 1213 "failed to read native max address (err_mask=0x%x)\n", 1214 err_mask); 1215 if (err_mask == AC_ERR_DEV && (tf.error & ATA_ABORTED)) 1216 return -EACCES; 1217 return -EIO; 1218 } 1219 1220 if (lba48) 1221 *max_sectors = ata_tf_to_lba48(&tf) + 1; 1222 else 1223 *max_sectors = ata_tf_to_lba(&tf) + 1; 1224 if (dev->horkage & ATA_HORKAGE_HPA_SIZE) 1225 (*max_sectors)--; 1226 return 0; 1227 } 1228 1229 /** 1230 * ata_set_max_sectors - Set max sectors 1231 * @dev: target device 1232 * @new_sectors: new max sectors value to set for the device 1233 * 1234 * Set max sectors of @dev to @new_sectors. 1235 * 1236 * RETURNS: 1237 * 0 on success, -EACCES if command is aborted or denied (due to 1238 * previous non-volatile SET_MAX) by the drive. -EIO on other 1239 * errors. 1240 */ 1241 static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors) 1242 { 1243 unsigned int err_mask; 1244 struct ata_taskfile tf; 1245 int lba48 = ata_id_has_lba48(dev->id); 1246 1247 new_sectors--; 1248 1249 ata_tf_init(dev, &tf); 1250 1251 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 1252 1253 if (lba48) { 1254 tf.command = ATA_CMD_SET_MAX_EXT; 1255 tf.flags |= ATA_TFLAG_LBA48; 1256 1257 tf.hob_lbal = (new_sectors >> 24) & 0xff; 1258 tf.hob_lbam = (new_sectors >> 32) & 0xff; 1259 tf.hob_lbah = (new_sectors >> 40) & 0xff; 1260 } else { 1261 tf.command = ATA_CMD_SET_MAX; 1262 1263 tf.device |= (new_sectors >> 24) & 0xf; 1264 } 1265 1266 tf.protocol = ATA_PROT_NODATA; 1267 tf.device |= ATA_LBA; 1268 1269 tf.lbal = (new_sectors >> 0) & 0xff; 1270 tf.lbam = (new_sectors >> 8) & 0xff; 1271 tf.lbah = (new_sectors >> 16) & 0xff; 1272 1273 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 1274 if (err_mask) { 1275 ata_dev_warn(dev, 1276 "failed to set max address (err_mask=0x%x)\n", 1277 err_mask); 1278 if (err_mask == AC_ERR_DEV && 1279 (tf.error & (ATA_ABORTED | ATA_IDNF))) 1280 return -EACCES; 1281 return -EIO; 1282 } 1283 1284 return 0; 1285 } 1286 1287 /** 1288 * ata_hpa_resize - Resize a device with an HPA set 1289 * @dev: Device to resize 1290 * 1291 * Read the size of an LBA28 or LBA48 disk with HPA features and resize 1292 * it if required to the full size of the media. The caller must check 1293 * the drive has the HPA feature set enabled. 1294 * 1295 * RETURNS: 1296 * 0 on success, -errno on failure. 1297 */ 1298 static int ata_hpa_resize(struct ata_device *dev) 1299 { 1300 bool print_info = ata_dev_print_info(dev); 1301 bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA; 1302 u64 sectors = ata_id_n_sectors(dev->id); 1303 u64 native_sectors; 1304 int rc; 1305 1306 /* do we need to do it? */ 1307 if ((dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) || 1308 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || 1309 (dev->horkage & ATA_HORKAGE_BROKEN_HPA)) 1310 return 0; 1311 1312 /* read native max address */ 1313 rc = ata_read_native_max_address(dev, &native_sectors); 1314 if (rc) { 1315 /* If device aborted the command or HPA isn't going to 1316 * be unlocked, skip HPA resizing. 1317 */ 1318 if (rc == -EACCES || !unlock_hpa) { 1319 ata_dev_warn(dev, 1320 "HPA support seems broken, skipping HPA handling\n"); 1321 dev->horkage |= ATA_HORKAGE_BROKEN_HPA; 1322 1323 /* we can continue if device aborted the command */ 1324 if (rc == -EACCES) 1325 rc = 0; 1326 } 1327 1328 return rc; 1329 } 1330 dev->n_native_sectors = native_sectors; 1331 1332 /* nothing to do? */ 1333 if (native_sectors <= sectors || !unlock_hpa) { 1334 if (!print_info || native_sectors == sectors) 1335 return 0; 1336 1337 if (native_sectors > sectors) 1338 ata_dev_info(dev, 1339 "HPA detected: current %llu, native %llu\n", 1340 (unsigned long long)sectors, 1341 (unsigned long long)native_sectors); 1342 else if (native_sectors < sectors) 1343 ata_dev_warn(dev, 1344 "native sectors (%llu) is smaller than sectors (%llu)\n", 1345 (unsigned long long)native_sectors, 1346 (unsigned long long)sectors); 1347 return 0; 1348 } 1349 1350 /* let's unlock HPA */ 1351 rc = ata_set_max_sectors(dev, native_sectors); 1352 if (rc == -EACCES) { 1353 /* if device aborted the command, skip HPA resizing */ 1354 ata_dev_warn(dev, 1355 "device aborted resize (%llu -> %llu), skipping HPA handling\n", 1356 (unsigned long long)sectors, 1357 (unsigned long long)native_sectors); 1358 dev->horkage |= ATA_HORKAGE_BROKEN_HPA; 1359 return 0; 1360 } else if (rc) 1361 return rc; 1362 1363 /* re-read IDENTIFY data */ 1364 rc = ata_dev_reread_id(dev, 0); 1365 if (rc) { 1366 ata_dev_err(dev, 1367 "failed to re-read IDENTIFY data after HPA resizing\n"); 1368 return rc; 1369 } 1370 1371 if (print_info) { 1372 u64 new_sectors = ata_id_n_sectors(dev->id); 1373 ata_dev_info(dev, 1374 "HPA unlocked: %llu -> %llu, native %llu\n", 1375 (unsigned long long)sectors, 1376 (unsigned long long)new_sectors, 1377 (unsigned long long)native_sectors); 1378 } 1379 1380 return 0; 1381 } 1382 1383 /** 1384 * ata_dump_id - IDENTIFY DEVICE info debugging output 1385 * @dev: device from which the information is fetched 1386 * @id: IDENTIFY DEVICE page to dump 1387 * 1388 * Dump selected 16-bit words from the given IDENTIFY DEVICE 1389 * page. 1390 * 1391 * LOCKING: 1392 * caller. 1393 */ 1394 1395 static inline void ata_dump_id(struct ata_device *dev, const u16 *id) 1396 { 1397 ata_dev_dbg(dev, 1398 "49==0x%04x 53==0x%04x 63==0x%04x 64==0x%04x 75==0x%04x\n" 1399 "80==0x%04x 81==0x%04x 82==0x%04x 83==0x%04x 84==0x%04x\n" 1400 "88==0x%04x 93==0x%04x\n", 1401 id[49], id[53], id[63], id[64], id[75], id[80], 1402 id[81], id[82], id[83], id[84], id[88], id[93]); 1403 } 1404 1405 /** 1406 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data 1407 * @id: IDENTIFY data to compute xfer mask from 1408 * 1409 * Compute the xfermask for this device. This is not as trivial 1410 * as it seems if we must consider early devices correctly. 1411 * 1412 * FIXME: pre IDE drive timing (do we care ?). 1413 * 1414 * LOCKING: 1415 * None. 1416 * 1417 * RETURNS: 1418 * Computed xfermask 1419 */ 1420 unsigned int ata_id_xfermask(const u16 *id) 1421 { 1422 unsigned int pio_mask, mwdma_mask, udma_mask; 1423 1424 /* Usual case. Word 53 indicates word 64 is valid */ 1425 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { 1426 pio_mask = id[ATA_ID_PIO_MODES] & 0x03; 1427 pio_mask <<= 3; 1428 pio_mask |= 0x7; 1429 } else { 1430 /* If word 64 isn't valid then Word 51 high byte holds 1431 * the PIO timing number for the maximum. Turn it into 1432 * a mask. 1433 */ 1434 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; 1435 if (mode < 5) /* Valid PIO range */ 1436 pio_mask = (2 << mode) - 1; 1437 else 1438 pio_mask = 1; 1439 1440 /* But wait.. there's more. Design your standards by 1441 * committee and you too can get a free iordy field to 1442 * process. However it is the speeds not the modes that 1443 * are supported... Note drivers using the timing API 1444 * will get this right anyway 1445 */ 1446 } 1447 1448 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; 1449 1450 if (ata_id_is_cfa(id)) { 1451 /* 1452 * Process compact flash extended modes 1453 */ 1454 int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7; 1455 int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7; 1456 1457 if (pio) 1458 pio_mask |= (1 << 5); 1459 if (pio > 1) 1460 pio_mask |= (1 << 6); 1461 if (dma) 1462 mwdma_mask |= (1 << 3); 1463 if (dma > 1) 1464 mwdma_mask |= (1 << 4); 1465 } 1466 1467 udma_mask = 0; 1468 if (id[ATA_ID_FIELD_VALID] & (1 << 2)) 1469 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; 1470 1471 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 1472 } 1473 EXPORT_SYMBOL_GPL(ata_id_xfermask); 1474 1475 static void ata_qc_complete_internal(struct ata_queued_cmd *qc) 1476 { 1477 struct completion *waiting = qc->private_data; 1478 1479 complete(waiting); 1480 } 1481 1482 /** 1483 * ata_exec_internal_sg - execute libata internal command 1484 * @dev: Device to which the command is sent 1485 * @tf: Taskfile registers for the command and the result 1486 * @cdb: CDB for packet command 1487 * @dma_dir: Data transfer direction of the command 1488 * @sgl: sg list for the data buffer of the command 1489 * @n_elem: Number of sg entries 1490 * @timeout: Timeout in msecs (0 for default) 1491 * 1492 * Executes libata internal command with timeout. @tf contains 1493 * command on entry and result on return. Timeout and error 1494 * conditions are reported via return value. No recovery action 1495 * is taken after a command times out. It's caller's duty to 1496 * clean up after timeout. 1497 * 1498 * LOCKING: 1499 * None. Should be called with kernel context, might sleep. 1500 * 1501 * RETURNS: 1502 * Zero on success, AC_ERR_* mask on failure 1503 */ 1504 static unsigned ata_exec_internal_sg(struct ata_device *dev, 1505 struct ata_taskfile *tf, const u8 *cdb, 1506 int dma_dir, struct scatterlist *sgl, 1507 unsigned int n_elem, unsigned int timeout) 1508 { 1509 struct ata_link *link = dev->link; 1510 struct ata_port *ap = link->ap; 1511 u8 command = tf->command; 1512 int auto_timeout = 0; 1513 struct ata_queued_cmd *qc; 1514 unsigned int preempted_tag; 1515 u32 preempted_sactive; 1516 u64 preempted_qc_active; 1517 int preempted_nr_active_links; 1518 DECLARE_COMPLETION_ONSTACK(wait); 1519 unsigned long flags; 1520 unsigned int err_mask; 1521 int rc; 1522 1523 spin_lock_irqsave(ap->lock, flags); 1524 1525 /* no internal command while frozen */ 1526 if (ata_port_is_frozen(ap)) { 1527 spin_unlock_irqrestore(ap->lock, flags); 1528 return AC_ERR_SYSTEM; 1529 } 1530 1531 /* initialize internal qc */ 1532 qc = __ata_qc_from_tag(ap, ATA_TAG_INTERNAL); 1533 1534 qc->tag = ATA_TAG_INTERNAL; 1535 qc->hw_tag = 0; 1536 qc->scsicmd = NULL; 1537 qc->ap = ap; 1538 qc->dev = dev; 1539 ata_qc_reinit(qc); 1540 1541 preempted_tag = link->active_tag; 1542 preempted_sactive = link->sactive; 1543 preempted_qc_active = ap->qc_active; 1544 preempted_nr_active_links = ap->nr_active_links; 1545 link->active_tag = ATA_TAG_POISON; 1546 link->sactive = 0; 1547 ap->qc_active = 0; 1548 ap->nr_active_links = 0; 1549 1550 /* prepare & issue qc */ 1551 qc->tf = *tf; 1552 if (cdb) 1553 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); 1554 1555 /* some SATA bridges need us to indicate data xfer direction */ 1556 if (tf->protocol == ATAPI_PROT_DMA && (dev->flags & ATA_DFLAG_DMADIR) && 1557 dma_dir == DMA_FROM_DEVICE) 1558 qc->tf.feature |= ATAPI_DMADIR; 1559 1560 qc->flags |= ATA_QCFLAG_RESULT_TF; 1561 qc->dma_dir = dma_dir; 1562 if (dma_dir != DMA_NONE) { 1563 unsigned int i, buflen = 0; 1564 struct scatterlist *sg; 1565 1566 for_each_sg(sgl, sg, n_elem, i) 1567 buflen += sg->length; 1568 1569 ata_sg_init(qc, sgl, n_elem); 1570 qc->nbytes = buflen; 1571 } 1572 1573 qc->private_data = &wait; 1574 qc->complete_fn = ata_qc_complete_internal; 1575 1576 ata_qc_issue(qc); 1577 1578 spin_unlock_irqrestore(ap->lock, flags); 1579 1580 if (!timeout) { 1581 if (ata_probe_timeout) 1582 timeout = ata_probe_timeout * 1000; 1583 else { 1584 timeout = ata_internal_cmd_timeout(dev, command); 1585 auto_timeout = 1; 1586 } 1587 } 1588 1589 ata_eh_release(ap); 1590 1591 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout)); 1592 1593 ata_eh_acquire(ap); 1594 1595 ata_sff_flush_pio_task(ap); 1596 1597 if (!rc) { 1598 spin_lock_irqsave(ap->lock, flags); 1599 1600 /* We're racing with irq here. If we lose, the 1601 * following test prevents us from completing the qc 1602 * twice. If we win, the port is frozen and will be 1603 * cleaned up by ->post_internal_cmd(). 1604 */ 1605 if (qc->flags & ATA_QCFLAG_ACTIVE) { 1606 qc->err_mask |= AC_ERR_TIMEOUT; 1607 1608 ata_port_freeze(ap); 1609 1610 ata_dev_warn(dev, "qc timeout after %u msecs (cmd 0x%x)\n", 1611 timeout, command); 1612 } 1613 1614 spin_unlock_irqrestore(ap->lock, flags); 1615 } 1616 1617 /* do post_internal_cmd */ 1618 if (ap->ops->post_internal_cmd) 1619 ap->ops->post_internal_cmd(qc); 1620 1621 /* perform minimal error analysis */ 1622 if (qc->flags & ATA_QCFLAG_EH) { 1623 if (qc->result_tf.status & (ATA_ERR | ATA_DF)) 1624 qc->err_mask |= AC_ERR_DEV; 1625 1626 if (!qc->err_mask) 1627 qc->err_mask |= AC_ERR_OTHER; 1628 1629 if (qc->err_mask & ~AC_ERR_OTHER) 1630 qc->err_mask &= ~AC_ERR_OTHER; 1631 } else if (qc->tf.command == ATA_CMD_REQ_SENSE_DATA) { 1632 qc->result_tf.status |= ATA_SENSE; 1633 } 1634 1635 /* finish up */ 1636 spin_lock_irqsave(ap->lock, flags); 1637 1638 *tf = qc->result_tf; 1639 err_mask = qc->err_mask; 1640 1641 ata_qc_free(qc); 1642 link->active_tag = preempted_tag; 1643 link->sactive = preempted_sactive; 1644 ap->qc_active = preempted_qc_active; 1645 ap->nr_active_links = preempted_nr_active_links; 1646 1647 spin_unlock_irqrestore(ap->lock, flags); 1648 1649 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout) 1650 ata_internal_cmd_timed_out(dev, command); 1651 1652 return err_mask; 1653 } 1654 1655 /** 1656 * ata_exec_internal - execute libata internal command 1657 * @dev: Device to which the command is sent 1658 * @tf: Taskfile registers for the command and the result 1659 * @cdb: CDB for packet command 1660 * @dma_dir: Data transfer direction of the command 1661 * @buf: Data buffer of the command 1662 * @buflen: Length of data buffer 1663 * @timeout: Timeout in msecs (0 for default) 1664 * 1665 * Wrapper around ata_exec_internal_sg() which takes simple 1666 * buffer instead of sg list. 1667 * 1668 * LOCKING: 1669 * None. Should be called with kernel context, might sleep. 1670 * 1671 * RETURNS: 1672 * Zero on success, AC_ERR_* mask on failure 1673 */ 1674 unsigned ata_exec_internal(struct ata_device *dev, 1675 struct ata_taskfile *tf, const u8 *cdb, 1676 int dma_dir, void *buf, unsigned int buflen, 1677 unsigned int timeout) 1678 { 1679 struct scatterlist *psg = NULL, sg; 1680 unsigned int n_elem = 0; 1681 1682 if (dma_dir != DMA_NONE) { 1683 WARN_ON(!buf); 1684 sg_init_one(&sg, buf, buflen); 1685 psg = &sg; 1686 n_elem++; 1687 } 1688 1689 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem, 1690 timeout); 1691 } 1692 1693 /** 1694 * ata_pio_need_iordy - check if iordy needed 1695 * @adev: ATA device 1696 * 1697 * Check if the current speed of the device requires IORDY. Used 1698 * by various controllers for chip configuration. 1699 */ 1700 unsigned int ata_pio_need_iordy(const struct ata_device *adev) 1701 { 1702 /* Don't set IORDY if we're preparing for reset. IORDY may 1703 * lead to controller lock up on certain controllers if the 1704 * port is not occupied. See bko#11703 for details. 1705 */ 1706 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING) 1707 return 0; 1708 /* Controller doesn't support IORDY. Probably a pointless 1709 * check as the caller should know this. 1710 */ 1711 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) 1712 return 0; 1713 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */ 1714 if (ata_id_is_cfa(adev->id) 1715 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6)) 1716 return 0; 1717 /* PIO3 and higher it is mandatory */ 1718 if (adev->pio_mode > XFER_PIO_2) 1719 return 1; 1720 /* We turn it on when possible */ 1721 if (ata_id_has_iordy(adev->id)) 1722 return 1; 1723 return 0; 1724 } 1725 EXPORT_SYMBOL_GPL(ata_pio_need_iordy); 1726 1727 /** 1728 * ata_pio_mask_no_iordy - Return the non IORDY mask 1729 * @adev: ATA device 1730 * 1731 * Compute the highest mode possible if we are not using iordy. Return 1732 * -1 if no iordy mode is available. 1733 */ 1734 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) 1735 { 1736 /* If we have no drive specific rule, then PIO 2 is non IORDY */ 1737 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ 1738 u16 pio = adev->id[ATA_ID_EIDE_PIO]; 1739 /* Is the speed faster than the drive allows non IORDY ? */ 1740 if (pio) { 1741 /* This is cycle times not frequency - watch the logic! */ 1742 if (pio > 240) /* PIO2 is 240nS per cycle */ 1743 return 3 << ATA_SHIFT_PIO; 1744 return 7 << ATA_SHIFT_PIO; 1745 } 1746 } 1747 return 3 << ATA_SHIFT_PIO; 1748 } 1749 1750 /** 1751 * ata_do_dev_read_id - default ID read method 1752 * @dev: device 1753 * @tf: proposed taskfile 1754 * @id: data buffer 1755 * 1756 * Issue the identify taskfile and hand back the buffer containing 1757 * identify data. For some RAID controllers and for pre ATA devices 1758 * this function is wrapped or replaced by the driver 1759 */ 1760 unsigned int ata_do_dev_read_id(struct ata_device *dev, 1761 struct ata_taskfile *tf, __le16 *id) 1762 { 1763 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE, 1764 id, sizeof(id[0]) * ATA_ID_WORDS, 0); 1765 } 1766 EXPORT_SYMBOL_GPL(ata_do_dev_read_id); 1767 1768 /** 1769 * ata_dev_read_id - Read ID data from the specified device 1770 * @dev: target device 1771 * @p_class: pointer to class of the target device (may be changed) 1772 * @flags: ATA_READID_* flags 1773 * @id: buffer to read IDENTIFY data into 1774 * 1775 * Read ID data from the specified device. ATA_CMD_ID_ATA is 1776 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI 1777 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS 1778 * for pre-ATA4 drives. 1779 * 1780 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right 1781 * now we abort if we hit that case. 1782 * 1783 * LOCKING: 1784 * Kernel thread context (may sleep) 1785 * 1786 * RETURNS: 1787 * 0 on success, -errno otherwise. 1788 */ 1789 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, 1790 unsigned int flags, u16 *id) 1791 { 1792 struct ata_port *ap = dev->link->ap; 1793 unsigned int class = *p_class; 1794 struct ata_taskfile tf; 1795 unsigned int err_mask = 0; 1796 const char *reason; 1797 bool is_semb = class == ATA_DEV_SEMB; 1798 int may_fallback = 1, tried_spinup = 0; 1799 int rc; 1800 1801 retry: 1802 ata_tf_init(dev, &tf); 1803 1804 switch (class) { 1805 case ATA_DEV_SEMB: 1806 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */ 1807 fallthrough; 1808 case ATA_DEV_ATA: 1809 case ATA_DEV_ZAC: 1810 tf.command = ATA_CMD_ID_ATA; 1811 break; 1812 case ATA_DEV_ATAPI: 1813 tf.command = ATA_CMD_ID_ATAPI; 1814 break; 1815 default: 1816 rc = -ENODEV; 1817 reason = "unsupported class"; 1818 goto err_out; 1819 } 1820 1821 tf.protocol = ATA_PROT_PIO; 1822 1823 /* Some devices choke if TF registers contain garbage. Make 1824 * sure those are properly initialized. 1825 */ 1826 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 1827 1828 /* Device presence detection is unreliable on some 1829 * controllers. Always poll IDENTIFY if available. 1830 */ 1831 tf.flags |= ATA_TFLAG_POLLING; 1832 1833 if (ap->ops->read_id) 1834 err_mask = ap->ops->read_id(dev, &tf, (__le16 *)id); 1835 else 1836 err_mask = ata_do_dev_read_id(dev, &tf, (__le16 *)id); 1837 1838 if (err_mask) { 1839 if (err_mask & AC_ERR_NODEV_HINT) { 1840 ata_dev_dbg(dev, "NODEV after polling detection\n"); 1841 return -ENOENT; 1842 } 1843 1844 if (is_semb) { 1845 ata_dev_info(dev, 1846 "IDENTIFY failed on device w/ SEMB sig, disabled\n"); 1847 /* SEMB is not supported yet */ 1848 *p_class = ATA_DEV_SEMB_UNSUP; 1849 return 0; 1850 } 1851 1852 if ((err_mask == AC_ERR_DEV) && (tf.error & ATA_ABORTED)) { 1853 /* Device or controller might have reported 1854 * the wrong device class. Give a shot at the 1855 * other IDENTIFY if the current one is 1856 * aborted by the device. 1857 */ 1858 if (may_fallback) { 1859 may_fallback = 0; 1860 1861 if (class == ATA_DEV_ATA) 1862 class = ATA_DEV_ATAPI; 1863 else 1864 class = ATA_DEV_ATA; 1865 goto retry; 1866 } 1867 1868 /* Control reaches here iff the device aborted 1869 * both flavors of IDENTIFYs which happens 1870 * sometimes with phantom devices. 1871 */ 1872 ata_dev_dbg(dev, 1873 "both IDENTIFYs aborted, assuming NODEV\n"); 1874 return -ENOENT; 1875 } 1876 1877 rc = -EIO; 1878 reason = "I/O error"; 1879 goto err_out; 1880 } 1881 1882 if (dev->horkage & ATA_HORKAGE_DUMP_ID) { 1883 ata_dev_info(dev, "dumping IDENTIFY data, " 1884 "class=%d may_fallback=%d tried_spinup=%d\n", 1885 class, may_fallback, tried_spinup); 1886 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 1887 16, 2, id, ATA_ID_WORDS * sizeof(*id), true); 1888 } 1889 1890 /* Falling back doesn't make sense if ID data was read 1891 * successfully at least once. 1892 */ 1893 may_fallback = 0; 1894 1895 swap_buf_le16(id, ATA_ID_WORDS); 1896 1897 /* sanity check */ 1898 rc = -EINVAL; 1899 reason = "device reports invalid type"; 1900 1901 if (class == ATA_DEV_ATA || class == ATA_DEV_ZAC) { 1902 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) 1903 goto err_out; 1904 if (ap->host->flags & ATA_HOST_IGNORE_ATA && 1905 ata_id_is_ata(id)) { 1906 ata_dev_dbg(dev, 1907 "host indicates ignore ATA devices, ignored\n"); 1908 return -ENOENT; 1909 } 1910 } else { 1911 if (ata_id_is_ata(id)) 1912 goto err_out; 1913 } 1914 1915 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { 1916 tried_spinup = 1; 1917 /* 1918 * Drive powered-up in standby mode, and requires a specific 1919 * SET_FEATURES spin-up subcommand before it will accept 1920 * anything other than the original IDENTIFY command. 1921 */ 1922 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0); 1923 if (err_mask && id[2] != 0x738c) { 1924 rc = -EIO; 1925 reason = "SPINUP failed"; 1926 goto err_out; 1927 } 1928 /* 1929 * If the drive initially returned incomplete IDENTIFY info, 1930 * we now must reissue the IDENTIFY command. 1931 */ 1932 if (id[2] == 0x37c8) 1933 goto retry; 1934 } 1935 1936 if ((flags & ATA_READID_POSTRESET) && 1937 (class == ATA_DEV_ATA || class == ATA_DEV_ZAC)) { 1938 /* 1939 * The exact sequence expected by certain pre-ATA4 drives is: 1940 * SRST RESET 1941 * IDENTIFY (optional in early ATA) 1942 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA) 1943 * anything else.. 1944 * Some drives were very specific about that exact sequence. 1945 * 1946 * Note that ATA4 says lba is mandatory so the second check 1947 * should never trigger. 1948 */ 1949 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { 1950 err_mask = ata_dev_init_params(dev, id[3], id[6]); 1951 if (err_mask) { 1952 rc = -EIO; 1953 reason = "INIT_DEV_PARAMS failed"; 1954 goto err_out; 1955 } 1956 1957 /* current CHS translation info (id[53-58]) might be 1958 * changed. reread the identify device info. 1959 */ 1960 flags &= ~ATA_READID_POSTRESET; 1961 goto retry; 1962 } 1963 } 1964 1965 *p_class = class; 1966 1967 return 0; 1968 1969 err_out: 1970 ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n", 1971 reason, err_mask); 1972 return rc; 1973 } 1974 1975 /** 1976 * ata_dev_power_set_standby - Set a device power mode to standby 1977 * @dev: target device 1978 * 1979 * Issue a STANDBY IMMEDIATE command to set a device power mode to standby. 1980 * For an HDD device, this spins down the disks. 1981 * 1982 * LOCKING: 1983 * Kernel thread context (may sleep). 1984 */ 1985 void ata_dev_power_set_standby(struct ata_device *dev) 1986 { 1987 unsigned long ap_flags = dev->link->ap->flags; 1988 struct ata_taskfile tf; 1989 unsigned int err_mask; 1990 1991 /* Issue STANDBY IMMEDIATE command only if supported by the device */ 1992 if (dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) 1993 return; 1994 1995 /* 1996 * Some odd clown BIOSes issue spindown on power off (ACPI S4 or S5) 1997 * causing some drives to spin up and down again. For these, do nothing 1998 * if we are being called on shutdown. 1999 */ 2000 if ((ap_flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && 2001 system_state == SYSTEM_POWER_OFF) 2002 return; 2003 2004 if ((ap_flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && 2005 system_entering_hibernation()) 2006 return; 2007 2008 ata_tf_init(dev, &tf); 2009 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 2010 tf.protocol = ATA_PROT_NODATA; 2011 tf.command = ATA_CMD_STANDBYNOW1; 2012 2013 ata_dev_notice(dev, "Entering standby power mode\n"); 2014 2015 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 2016 if (err_mask) 2017 ata_dev_err(dev, "STANDBY IMMEDIATE failed (err_mask=0x%x)\n", 2018 err_mask); 2019 } 2020 2021 /** 2022 * ata_dev_power_set_active - Set a device power mode to active 2023 * @dev: target device 2024 * 2025 * Issue a VERIFY command to enter to ensure that the device is in the 2026 * active power mode. For a spun-down HDD (standby or idle power mode), 2027 * the VERIFY command will complete after the disk spins up. 2028 * 2029 * LOCKING: 2030 * Kernel thread context (may sleep). 2031 */ 2032 void ata_dev_power_set_active(struct ata_device *dev) 2033 { 2034 struct ata_taskfile tf; 2035 unsigned int err_mask; 2036 2037 /* 2038 * Issue READ VERIFY SECTORS command for 1 sector at lba=0 only 2039 * if supported by the device. 2040 */ 2041 if (dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) 2042 return; 2043 2044 ata_tf_init(dev, &tf); 2045 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; 2046 tf.protocol = ATA_PROT_NODATA; 2047 tf.command = ATA_CMD_VERIFY; 2048 tf.nsect = 1; 2049 if (dev->flags & ATA_DFLAG_LBA) { 2050 tf.flags |= ATA_TFLAG_LBA; 2051 tf.device |= ATA_LBA; 2052 } else { 2053 /* CHS */ 2054 tf.lbal = 0x1; /* sect */ 2055 } 2056 2057 ata_dev_notice(dev, "Entering active power mode\n"); 2058 2059 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 2060 if (err_mask) 2061 ata_dev_err(dev, "VERIFY failed (err_mask=0x%x)\n", 2062 err_mask); 2063 } 2064 2065 /** 2066 * ata_read_log_page - read a specific log page 2067 * @dev: target device 2068 * @log: log to read 2069 * @page: page to read 2070 * @buf: buffer to store read page 2071 * @sectors: number of sectors to read 2072 * 2073 * Read log page using READ_LOG_EXT command. 2074 * 2075 * LOCKING: 2076 * Kernel thread context (may sleep). 2077 * 2078 * RETURNS: 2079 * 0 on success, AC_ERR_* mask otherwise. 2080 */ 2081 unsigned int ata_read_log_page(struct ata_device *dev, u8 log, 2082 u8 page, void *buf, unsigned int sectors) 2083 { 2084 unsigned long ap_flags = dev->link->ap->flags; 2085 struct ata_taskfile tf; 2086 unsigned int err_mask; 2087 bool dma = false; 2088 2089 ata_dev_dbg(dev, "read log page - log 0x%x, page 0x%x\n", log, page); 2090 2091 /* 2092 * Return error without actually issuing the command on controllers 2093 * which e.g. lockup on a read log page. 2094 */ 2095 if (ap_flags & ATA_FLAG_NO_LOG_PAGE) 2096 return AC_ERR_DEV; 2097 2098 retry: 2099 ata_tf_init(dev, &tf); 2100 if (ata_dma_enabled(dev) && ata_id_has_read_log_dma_ext(dev->id) && 2101 !(dev->horkage & ATA_HORKAGE_NO_DMA_LOG)) { 2102 tf.command = ATA_CMD_READ_LOG_DMA_EXT; 2103 tf.protocol = ATA_PROT_DMA; 2104 dma = true; 2105 } else { 2106 tf.command = ATA_CMD_READ_LOG_EXT; 2107 tf.protocol = ATA_PROT_PIO; 2108 dma = false; 2109 } 2110 tf.lbal = log; 2111 tf.lbam = page; 2112 tf.nsect = sectors; 2113 tf.hob_nsect = sectors >> 8; 2114 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE; 2115 2116 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, 2117 buf, sectors * ATA_SECT_SIZE, 0); 2118 2119 if (err_mask) { 2120 if (dma) { 2121 dev->horkage |= ATA_HORKAGE_NO_DMA_LOG; 2122 if (!ata_port_is_frozen(dev->link->ap)) 2123 goto retry; 2124 } 2125 ata_dev_err(dev, 2126 "Read log 0x%02x page 0x%02x failed, Emask 0x%x\n", 2127 (unsigned int)log, (unsigned int)page, err_mask); 2128 } 2129 2130 return err_mask; 2131 } 2132 2133 static int ata_log_supported(struct ata_device *dev, u8 log) 2134 { 2135 struct ata_port *ap = dev->link->ap; 2136 2137 if (dev->horkage & ATA_HORKAGE_NO_LOG_DIR) 2138 return 0; 2139 2140 if (ata_read_log_page(dev, ATA_LOG_DIRECTORY, 0, ap->sector_buf, 1)) 2141 return 0; 2142 return get_unaligned_le16(&ap->sector_buf[log * 2]); 2143 } 2144 2145 static bool ata_identify_page_supported(struct ata_device *dev, u8 page) 2146 { 2147 struct ata_port *ap = dev->link->ap; 2148 unsigned int err, i; 2149 2150 if (dev->horkage & ATA_HORKAGE_NO_ID_DEV_LOG) 2151 return false; 2152 2153 if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE)) { 2154 /* 2155 * IDENTIFY DEVICE data log is defined as mandatory starting 2156 * with ACS-3 (ATA version 10). Warn about the missing log 2157 * for drives which implement this ATA level or above. 2158 */ 2159 if (ata_id_major_version(dev->id) >= 10) 2160 ata_dev_warn(dev, 2161 "ATA Identify Device Log not supported\n"); 2162 dev->horkage |= ATA_HORKAGE_NO_ID_DEV_LOG; 2163 return false; 2164 } 2165 2166 /* 2167 * Read IDENTIFY DEVICE data log, page 0, to figure out if the page is 2168 * supported. 2169 */ 2170 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 0, ap->sector_buf, 2171 1); 2172 if (err) 2173 return false; 2174 2175 for (i = 0; i < ap->sector_buf[8]; i++) { 2176 if (ap->sector_buf[9 + i] == page) 2177 return true; 2178 } 2179 2180 return false; 2181 } 2182 2183 static int ata_do_link_spd_horkage(struct ata_device *dev) 2184 { 2185 struct ata_link *plink = ata_dev_phys_link(dev); 2186 u32 target, target_limit; 2187 2188 if (!sata_scr_valid(plink)) 2189 return 0; 2190 2191 if (dev->horkage & ATA_HORKAGE_1_5_GBPS) 2192 target = 1; 2193 else 2194 return 0; 2195 2196 target_limit = (1 << target) - 1; 2197 2198 /* if already on stricter limit, no need to push further */ 2199 if (plink->sata_spd_limit <= target_limit) 2200 return 0; 2201 2202 plink->sata_spd_limit = target_limit; 2203 2204 /* Request another EH round by returning -EAGAIN if link is 2205 * going faster than the target speed. Forward progress is 2206 * guaranteed by setting sata_spd_limit to target_limit above. 2207 */ 2208 if (plink->sata_spd > target) { 2209 ata_dev_info(dev, "applying link speed limit horkage to %s\n", 2210 sata_spd_string(target)); 2211 return -EAGAIN; 2212 } 2213 return 0; 2214 } 2215 2216 static inline u8 ata_dev_knobble(struct ata_device *dev) 2217 { 2218 struct ata_port *ap = dev->link->ap; 2219 2220 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK) 2221 return 0; 2222 2223 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); 2224 } 2225 2226 static void ata_dev_config_ncq_send_recv(struct ata_device *dev) 2227 { 2228 struct ata_port *ap = dev->link->ap; 2229 unsigned int err_mask; 2230 2231 if (!ata_log_supported(dev, ATA_LOG_NCQ_SEND_RECV)) { 2232 ata_dev_warn(dev, "NCQ Send/Recv Log not supported\n"); 2233 return; 2234 } 2235 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_SEND_RECV, 2236 0, ap->sector_buf, 1); 2237 if (!err_mask) { 2238 u8 *cmds = dev->ncq_send_recv_cmds; 2239 2240 dev->flags |= ATA_DFLAG_NCQ_SEND_RECV; 2241 memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_SEND_RECV_SIZE); 2242 2243 if (dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) { 2244 ata_dev_dbg(dev, "disabling queued TRIM support\n"); 2245 cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &= 2246 ~ATA_LOG_NCQ_SEND_RECV_DSM_TRIM; 2247 } 2248 } 2249 } 2250 2251 static void ata_dev_config_ncq_non_data(struct ata_device *dev) 2252 { 2253 struct ata_port *ap = dev->link->ap; 2254 unsigned int err_mask; 2255 2256 if (!ata_log_supported(dev, ATA_LOG_NCQ_NON_DATA)) { 2257 ata_dev_warn(dev, 2258 "NCQ Send/Recv Log not supported\n"); 2259 return; 2260 } 2261 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_NON_DATA, 2262 0, ap->sector_buf, 1); 2263 if (!err_mask) { 2264 u8 *cmds = dev->ncq_non_data_cmds; 2265 2266 memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_NON_DATA_SIZE); 2267 } 2268 } 2269 2270 static void ata_dev_config_ncq_prio(struct ata_device *dev) 2271 { 2272 struct ata_port *ap = dev->link->ap; 2273 unsigned int err_mask; 2274 2275 if (!ata_identify_page_supported(dev, ATA_LOG_SATA_SETTINGS)) 2276 return; 2277 2278 err_mask = ata_read_log_page(dev, 2279 ATA_LOG_IDENTIFY_DEVICE, 2280 ATA_LOG_SATA_SETTINGS, 2281 ap->sector_buf, 2282 1); 2283 if (err_mask) 2284 goto not_supported; 2285 2286 if (!(ap->sector_buf[ATA_LOG_NCQ_PRIO_OFFSET] & BIT(3))) 2287 goto not_supported; 2288 2289 dev->flags |= ATA_DFLAG_NCQ_PRIO; 2290 2291 return; 2292 2293 not_supported: 2294 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLED; 2295 dev->flags &= ~ATA_DFLAG_NCQ_PRIO; 2296 } 2297 2298 static bool ata_dev_check_adapter(struct ata_device *dev, 2299 unsigned short vendor_id) 2300 { 2301 struct pci_dev *pcidev = NULL; 2302 struct device *parent_dev = NULL; 2303 2304 for (parent_dev = dev->tdev.parent; parent_dev != NULL; 2305 parent_dev = parent_dev->parent) { 2306 if (dev_is_pci(parent_dev)) { 2307 pcidev = to_pci_dev(parent_dev); 2308 if (pcidev->vendor == vendor_id) 2309 return true; 2310 break; 2311 } 2312 } 2313 2314 return false; 2315 } 2316 2317 static int ata_dev_config_ncq(struct ata_device *dev, 2318 char *desc, size_t desc_sz) 2319 { 2320 struct ata_port *ap = dev->link->ap; 2321 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); 2322 unsigned int err_mask; 2323 char *aa_desc = ""; 2324 2325 if (!ata_id_has_ncq(dev->id)) { 2326 desc[0] = '\0'; 2327 return 0; 2328 } 2329 if (!IS_ENABLED(CONFIG_SATA_HOST)) 2330 return 0; 2331 if (dev->horkage & ATA_HORKAGE_NONCQ) { 2332 snprintf(desc, desc_sz, "NCQ (not used)"); 2333 return 0; 2334 } 2335 2336 if (dev->horkage & ATA_HORKAGE_NO_NCQ_ON_ATI && 2337 ata_dev_check_adapter(dev, PCI_VENDOR_ID_ATI)) { 2338 snprintf(desc, desc_sz, "NCQ (not used)"); 2339 return 0; 2340 } 2341 2342 if (ap->flags & ATA_FLAG_NCQ) { 2343 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE); 2344 dev->flags |= ATA_DFLAG_NCQ; 2345 } 2346 2347 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) && 2348 (ap->flags & ATA_FLAG_FPDMA_AA) && 2349 ata_id_has_fpdma_aa(dev->id)) { 2350 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE, 2351 SATA_FPDMA_AA); 2352 if (err_mask) { 2353 ata_dev_err(dev, 2354 "failed to enable AA (error_mask=0x%x)\n", 2355 err_mask); 2356 if (err_mask != AC_ERR_DEV) { 2357 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA; 2358 return -EIO; 2359 } 2360 } else 2361 aa_desc = ", AA"; 2362 } 2363 2364 if (hdepth >= ddepth) 2365 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc); 2366 else 2367 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth, 2368 ddepth, aa_desc); 2369 2370 if ((ap->flags & ATA_FLAG_FPDMA_AUX)) { 2371 if (ata_id_has_ncq_send_and_recv(dev->id)) 2372 ata_dev_config_ncq_send_recv(dev); 2373 if (ata_id_has_ncq_non_data(dev->id)) 2374 ata_dev_config_ncq_non_data(dev); 2375 if (ata_id_has_ncq_prio(dev->id)) 2376 ata_dev_config_ncq_prio(dev); 2377 } 2378 2379 return 0; 2380 } 2381 2382 static void ata_dev_config_sense_reporting(struct ata_device *dev) 2383 { 2384 unsigned int err_mask; 2385 2386 if (!ata_id_has_sense_reporting(dev->id)) 2387 return; 2388 2389 if (ata_id_sense_reporting_enabled(dev->id)) 2390 return; 2391 2392 err_mask = ata_dev_set_feature(dev, SETFEATURE_SENSE_DATA, 0x1); 2393 if (err_mask) { 2394 ata_dev_dbg(dev, 2395 "failed to enable Sense Data Reporting, Emask 0x%x\n", 2396 err_mask); 2397 } 2398 } 2399 2400 static void ata_dev_config_zac(struct ata_device *dev) 2401 { 2402 struct ata_port *ap = dev->link->ap; 2403 unsigned int err_mask; 2404 u8 *identify_buf = ap->sector_buf; 2405 2406 dev->zac_zones_optimal_open = U32_MAX; 2407 dev->zac_zones_optimal_nonseq = U32_MAX; 2408 dev->zac_zones_max_open = U32_MAX; 2409 2410 /* 2411 * Always set the 'ZAC' flag for Host-managed devices. 2412 */ 2413 if (dev->class == ATA_DEV_ZAC) 2414 dev->flags |= ATA_DFLAG_ZAC; 2415 else if (ata_id_zoned_cap(dev->id) == 0x01) 2416 /* 2417 * Check for host-aware devices. 2418 */ 2419 dev->flags |= ATA_DFLAG_ZAC; 2420 2421 if (!(dev->flags & ATA_DFLAG_ZAC)) 2422 return; 2423 2424 if (!ata_identify_page_supported(dev, ATA_LOG_ZONED_INFORMATION)) { 2425 ata_dev_warn(dev, 2426 "ATA Zoned Information Log not supported\n"); 2427 return; 2428 } 2429 2430 /* 2431 * Read IDENTIFY DEVICE data log, page 9 (Zoned-device information) 2432 */ 2433 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 2434 ATA_LOG_ZONED_INFORMATION, 2435 identify_buf, 1); 2436 if (!err_mask) { 2437 u64 zoned_cap, opt_open, opt_nonseq, max_open; 2438 2439 zoned_cap = get_unaligned_le64(&identify_buf[8]); 2440 if ((zoned_cap >> 63)) 2441 dev->zac_zoned_cap = (zoned_cap & 1); 2442 opt_open = get_unaligned_le64(&identify_buf[24]); 2443 if ((opt_open >> 63)) 2444 dev->zac_zones_optimal_open = (u32)opt_open; 2445 opt_nonseq = get_unaligned_le64(&identify_buf[32]); 2446 if ((opt_nonseq >> 63)) 2447 dev->zac_zones_optimal_nonseq = (u32)opt_nonseq; 2448 max_open = get_unaligned_le64(&identify_buf[40]); 2449 if ((max_open >> 63)) 2450 dev->zac_zones_max_open = (u32)max_open; 2451 } 2452 } 2453 2454 static void ata_dev_config_trusted(struct ata_device *dev) 2455 { 2456 struct ata_port *ap = dev->link->ap; 2457 u64 trusted_cap; 2458 unsigned int err; 2459 2460 if (!ata_id_has_trusted(dev->id)) 2461 return; 2462 2463 if (!ata_identify_page_supported(dev, ATA_LOG_SECURITY)) { 2464 ata_dev_warn(dev, 2465 "Security Log not supported\n"); 2466 return; 2467 } 2468 2469 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, ATA_LOG_SECURITY, 2470 ap->sector_buf, 1); 2471 if (err) 2472 return; 2473 2474 trusted_cap = get_unaligned_le64(&ap->sector_buf[40]); 2475 if (!(trusted_cap & (1ULL << 63))) { 2476 ata_dev_dbg(dev, 2477 "Trusted Computing capability qword not valid!\n"); 2478 return; 2479 } 2480 2481 if (trusted_cap & (1 << 0)) 2482 dev->flags |= ATA_DFLAG_TRUSTED; 2483 } 2484 2485 static void ata_dev_config_cdl(struct ata_device *dev) 2486 { 2487 struct ata_port *ap = dev->link->ap; 2488 unsigned int err_mask; 2489 bool cdl_enabled; 2490 u64 val; 2491 2492 if (ata_id_major_version(dev->id) < 12) 2493 goto not_supported; 2494 2495 if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE) || 2496 !ata_identify_page_supported(dev, ATA_LOG_SUPPORTED_CAPABILITIES) || 2497 !ata_identify_page_supported(dev, ATA_LOG_CURRENT_SETTINGS)) 2498 goto not_supported; 2499 2500 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 2501 ATA_LOG_SUPPORTED_CAPABILITIES, 2502 ap->sector_buf, 1); 2503 if (err_mask) 2504 goto not_supported; 2505 2506 /* Check Command Duration Limit Supported bits */ 2507 val = get_unaligned_le64(&ap->sector_buf[168]); 2508 if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(0))) 2509 goto not_supported; 2510 2511 /* Warn the user if command duration guideline is not supported */ 2512 if (!(val & BIT_ULL(1))) 2513 ata_dev_warn(dev, 2514 "Command duration guideline is not supported\n"); 2515 2516 /* 2517 * We must have support for the sense data for successful NCQ commands 2518 * log indicated by the successful NCQ command sense data supported bit. 2519 */ 2520 val = get_unaligned_le64(&ap->sector_buf[8]); 2521 if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(47))) { 2522 ata_dev_warn(dev, 2523 "CDL supported but Successful NCQ Command Sense Data is not supported\n"); 2524 goto not_supported; 2525 } 2526 2527 /* Without NCQ autosense, the successful NCQ commands log is useless. */ 2528 if (!ata_id_has_ncq_autosense(dev->id)) { 2529 ata_dev_warn(dev, 2530 "CDL supported but NCQ autosense is not supported\n"); 2531 goto not_supported; 2532 } 2533 2534 /* 2535 * If CDL is marked as enabled, make sure the feature is enabled too. 2536 * Conversely, if CDL is disabled, make sure the feature is turned off. 2537 */ 2538 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 2539 ATA_LOG_CURRENT_SETTINGS, 2540 ap->sector_buf, 1); 2541 if (err_mask) 2542 goto not_supported; 2543 2544 val = get_unaligned_le64(&ap->sector_buf[8]); 2545 cdl_enabled = val & BIT_ULL(63) && val & BIT_ULL(21); 2546 if (dev->flags & ATA_DFLAG_CDL_ENABLED) { 2547 if (!cdl_enabled) { 2548 /* Enable CDL on the device */ 2549 err_mask = ata_dev_set_feature(dev, SETFEATURES_CDL, 1); 2550 if (err_mask) { 2551 ata_dev_err(dev, 2552 "Enable CDL feature failed\n"); 2553 goto not_supported; 2554 } 2555 } 2556 } else { 2557 if (cdl_enabled) { 2558 /* Disable CDL on the device */ 2559 err_mask = ata_dev_set_feature(dev, SETFEATURES_CDL, 0); 2560 if (err_mask) { 2561 ata_dev_err(dev, 2562 "Disable CDL feature failed\n"); 2563 goto not_supported; 2564 } 2565 } 2566 } 2567 2568 /* 2569 * While CDL itself has to be enabled using sysfs, CDL requires that 2570 * sense data for successful NCQ commands is enabled to work properly. 2571 * Just like ata_dev_config_sense_reporting(), enable it unconditionally 2572 * if supported. 2573 */ 2574 if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(18))) { 2575 err_mask = ata_dev_set_feature(dev, 2576 SETFEATURE_SENSE_DATA_SUCC_NCQ, 0x1); 2577 if (err_mask) { 2578 ata_dev_warn(dev, 2579 "failed to enable Sense Data for successful NCQ commands, Emask 0x%x\n", 2580 err_mask); 2581 goto not_supported; 2582 } 2583 } 2584 2585 /* 2586 * Allocate a buffer to handle reading the sense data for successful 2587 * NCQ Commands log page for commands using a CDL with one of the limit 2588 * policy set to 0xD (successful completion with sense data available 2589 * bit set). 2590 */ 2591 if (!ap->ncq_sense_buf) { 2592 ap->ncq_sense_buf = kmalloc(ATA_LOG_SENSE_NCQ_SIZE, GFP_KERNEL); 2593 if (!ap->ncq_sense_buf) 2594 goto not_supported; 2595 } 2596 2597 /* 2598 * Command duration limits is supported: cache the CDL log page 18h 2599 * (command duration descriptors). 2600 */ 2601 err_mask = ata_read_log_page(dev, ATA_LOG_CDL, 0, ap->sector_buf, 1); 2602 if (err_mask) { 2603 ata_dev_warn(dev, "Read Command Duration Limits log failed\n"); 2604 goto not_supported; 2605 } 2606 2607 memcpy(dev->cdl, ap->sector_buf, ATA_LOG_CDL_SIZE); 2608 dev->flags |= ATA_DFLAG_CDL; 2609 2610 return; 2611 2612 not_supported: 2613 dev->flags &= ~(ATA_DFLAG_CDL | ATA_DFLAG_CDL_ENABLED); 2614 kfree(ap->ncq_sense_buf); 2615 ap->ncq_sense_buf = NULL; 2616 } 2617 2618 static int ata_dev_config_lba(struct ata_device *dev) 2619 { 2620 const u16 *id = dev->id; 2621 const char *lba_desc; 2622 char ncq_desc[32]; 2623 int ret; 2624 2625 dev->flags |= ATA_DFLAG_LBA; 2626 2627 if (ata_id_has_lba48(id)) { 2628 lba_desc = "LBA48"; 2629 dev->flags |= ATA_DFLAG_LBA48; 2630 if (dev->n_sectors >= (1UL << 28) && 2631 ata_id_has_flush_ext(id)) 2632 dev->flags |= ATA_DFLAG_FLUSH_EXT; 2633 } else { 2634 lba_desc = "LBA"; 2635 } 2636 2637 /* config NCQ */ 2638 ret = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); 2639 2640 /* print device info to dmesg */ 2641 if (ata_dev_print_info(dev)) 2642 ata_dev_info(dev, 2643 "%llu sectors, multi %u: %s %s\n", 2644 (unsigned long long)dev->n_sectors, 2645 dev->multi_count, lba_desc, ncq_desc); 2646 2647 return ret; 2648 } 2649 2650 static void ata_dev_config_chs(struct ata_device *dev) 2651 { 2652 const u16 *id = dev->id; 2653 2654 if (ata_id_current_chs_valid(id)) { 2655 /* Current CHS translation is valid. */ 2656 dev->cylinders = id[54]; 2657 dev->heads = id[55]; 2658 dev->sectors = id[56]; 2659 } else { 2660 /* Default translation */ 2661 dev->cylinders = id[1]; 2662 dev->heads = id[3]; 2663 dev->sectors = id[6]; 2664 } 2665 2666 /* print device info to dmesg */ 2667 if (ata_dev_print_info(dev)) 2668 ata_dev_info(dev, 2669 "%llu sectors, multi %u, CHS %u/%u/%u\n", 2670 (unsigned long long)dev->n_sectors, 2671 dev->multi_count, dev->cylinders, 2672 dev->heads, dev->sectors); 2673 } 2674 2675 static void ata_dev_config_fua(struct ata_device *dev) 2676 { 2677 /* Ignore FUA support if its use is disabled globally */ 2678 if (!libata_fua) 2679 goto nofua; 2680 2681 /* Ignore devices without support for WRITE DMA FUA EXT */ 2682 if (!(dev->flags & ATA_DFLAG_LBA48) || !ata_id_has_fua(dev->id)) 2683 goto nofua; 2684 2685 /* Ignore known bad devices and devices that lack NCQ support */ 2686 if (!ata_ncq_supported(dev) || (dev->horkage & ATA_HORKAGE_NO_FUA)) 2687 goto nofua; 2688 2689 dev->flags |= ATA_DFLAG_FUA; 2690 2691 return; 2692 2693 nofua: 2694 dev->flags &= ~ATA_DFLAG_FUA; 2695 } 2696 2697 static void ata_dev_config_devslp(struct ata_device *dev) 2698 { 2699 u8 *sata_setting = dev->link->ap->sector_buf; 2700 unsigned int err_mask; 2701 int i, j; 2702 2703 /* 2704 * Check device sleep capability. Get DevSlp timing variables 2705 * from SATA Settings page of Identify Device Data Log. 2706 */ 2707 if (!ata_id_has_devslp(dev->id) || 2708 !ata_identify_page_supported(dev, ATA_LOG_SATA_SETTINGS)) 2709 return; 2710 2711 err_mask = ata_read_log_page(dev, 2712 ATA_LOG_IDENTIFY_DEVICE, 2713 ATA_LOG_SATA_SETTINGS, 2714 sata_setting, 1); 2715 if (err_mask) 2716 return; 2717 2718 dev->flags |= ATA_DFLAG_DEVSLP; 2719 for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) { 2720 j = ATA_LOG_DEVSLP_OFFSET + i; 2721 dev->devslp_timing[i] = sata_setting[j]; 2722 } 2723 } 2724 2725 static void ata_dev_config_cpr(struct ata_device *dev) 2726 { 2727 unsigned int err_mask; 2728 size_t buf_len; 2729 int i, nr_cpr = 0; 2730 struct ata_cpr_log *cpr_log = NULL; 2731 u8 *desc, *buf = NULL; 2732 2733 if (ata_id_major_version(dev->id) < 11) 2734 goto out; 2735 2736 buf_len = ata_log_supported(dev, ATA_LOG_CONCURRENT_POSITIONING_RANGES); 2737 if (buf_len == 0) 2738 goto out; 2739 2740 /* 2741 * Read the concurrent positioning ranges log (0x47). We can have at 2742 * most 255 32B range descriptors plus a 64B header. This log varies in 2743 * size, so use the size reported in the GPL directory. Reading beyond 2744 * the supported length will result in an error. 2745 */ 2746 buf_len <<= 9; 2747 buf = kzalloc(buf_len, GFP_KERNEL); 2748 if (!buf) 2749 goto out; 2750 2751 err_mask = ata_read_log_page(dev, ATA_LOG_CONCURRENT_POSITIONING_RANGES, 2752 0, buf, buf_len >> 9); 2753 if (err_mask) 2754 goto out; 2755 2756 nr_cpr = buf[0]; 2757 if (!nr_cpr) 2758 goto out; 2759 2760 cpr_log = kzalloc(struct_size(cpr_log, cpr, nr_cpr), GFP_KERNEL); 2761 if (!cpr_log) 2762 goto out; 2763 2764 cpr_log->nr_cpr = nr_cpr; 2765 desc = &buf[64]; 2766 for (i = 0; i < nr_cpr; i++, desc += 32) { 2767 cpr_log->cpr[i].num = desc[0]; 2768 cpr_log->cpr[i].num_storage_elements = desc[1]; 2769 cpr_log->cpr[i].start_lba = get_unaligned_le64(&desc[8]); 2770 cpr_log->cpr[i].num_lbas = get_unaligned_le64(&desc[16]); 2771 } 2772 2773 out: 2774 swap(dev->cpr_log, cpr_log); 2775 kfree(cpr_log); 2776 kfree(buf); 2777 } 2778 2779 static void ata_dev_print_features(struct ata_device *dev) 2780 { 2781 if (!(dev->flags & ATA_DFLAG_FEATURES_MASK)) 2782 return; 2783 2784 ata_dev_info(dev, 2785 "Features:%s%s%s%s%s%s%s%s\n", 2786 dev->flags & ATA_DFLAG_FUA ? " FUA" : "", 2787 dev->flags & ATA_DFLAG_TRUSTED ? " Trust" : "", 2788 dev->flags & ATA_DFLAG_DA ? " Dev-Attention" : "", 2789 dev->flags & ATA_DFLAG_DEVSLP ? " Dev-Sleep" : "", 2790 dev->flags & ATA_DFLAG_NCQ_SEND_RECV ? " NCQ-sndrcv" : "", 2791 dev->flags & ATA_DFLAG_NCQ_PRIO ? " NCQ-prio" : "", 2792 dev->flags & ATA_DFLAG_CDL ? " CDL" : "", 2793 dev->cpr_log ? " CPR" : ""); 2794 } 2795 2796 /** 2797 * ata_dev_configure - Configure the specified ATA/ATAPI device 2798 * @dev: Target device to configure 2799 * 2800 * Configure @dev according to @dev->id. Generic and low-level 2801 * driver specific fixups are also applied. 2802 * 2803 * LOCKING: 2804 * Kernel thread context (may sleep) 2805 * 2806 * RETURNS: 2807 * 0 on success, -errno otherwise 2808 */ 2809 int ata_dev_configure(struct ata_device *dev) 2810 { 2811 struct ata_port *ap = dev->link->ap; 2812 bool print_info = ata_dev_print_info(dev); 2813 const u16 *id = dev->id; 2814 unsigned int xfer_mask; 2815 unsigned int err_mask; 2816 char revbuf[7]; /* XYZ-99\0 */ 2817 char fwrevbuf[ATA_ID_FW_REV_LEN+1]; 2818 char modelbuf[ATA_ID_PROD_LEN+1]; 2819 int rc; 2820 2821 if (!ata_dev_enabled(dev)) { 2822 ata_dev_dbg(dev, "no device\n"); 2823 return 0; 2824 } 2825 2826 /* set horkage */ 2827 dev->horkage |= ata_dev_blacklisted(dev); 2828 ata_force_horkage(dev); 2829 2830 if (dev->horkage & ATA_HORKAGE_DISABLE) { 2831 ata_dev_info(dev, "unsupported device, disabling\n"); 2832 ata_dev_disable(dev); 2833 return 0; 2834 } 2835 2836 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) && 2837 dev->class == ATA_DEV_ATAPI) { 2838 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n", 2839 atapi_enabled ? "not supported with this driver" 2840 : "disabled"); 2841 ata_dev_disable(dev); 2842 return 0; 2843 } 2844 2845 rc = ata_do_link_spd_horkage(dev); 2846 if (rc) 2847 return rc; 2848 2849 /* some WD SATA-1 drives have issues with LPM, turn on NOLPM for them */ 2850 if ((dev->horkage & ATA_HORKAGE_WD_BROKEN_LPM) && 2851 (id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2) 2852 dev->horkage |= ATA_HORKAGE_NOLPM; 2853 2854 if (ap->flags & ATA_FLAG_NO_LPM) 2855 dev->horkage |= ATA_HORKAGE_NOLPM; 2856 2857 if (dev->horkage & ATA_HORKAGE_NOLPM) { 2858 ata_dev_warn(dev, "LPM support broken, forcing max_power\n"); 2859 dev->link->ap->target_lpm_policy = ATA_LPM_MAX_POWER; 2860 } 2861 2862 /* let ACPI work its magic */ 2863 rc = ata_acpi_on_devcfg(dev); 2864 if (rc) 2865 return rc; 2866 2867 /* massage HPA, do it early as it might change IDENTIFY data */ 2868 rc = ata_hpa_resize(dev); 2869 if (rc) 2870 return rc; 2871 2872 /* print device capabilities */ 2873 ata_dev_dbg(dev, 2874 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " 2875 "85:%04x 86:%04x 87:%04x 88:%04x\n", 2876 __func__, 2877 id[49], id[82], id[83], id[84], 2878 id[85], id[86], id[87], id[88]); 2879 2880 /* initialize to-be-configured parameters */ 2881 dev->flags &= ~ATA_DFLAG_CFG_MASK; 2882 dev->max_sectors = 0; 2883 dev->cdb_len = 0; 2884 dev->n_sectors = 0; 2885 dev->cylinders = 0; 2886 dev->heads = 0; 2887 dev->sectors = 0; 2888 dev->multi_count = 0; 2889 2890 /* 2891 * common ATA, ATAPI feature tests 2892 */ 2893 2894 /* find max transfer mode; for printk only */ 2895 xfer_mask = ata_id_xfermask(id); 2896 2897 ata_dump_id(dev, id); 2898 2899 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ 2900 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, 2901 sizeof(fwrevbuf)); 2902 2903 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, 2904 sizeof(modelbuf)); 2905 2906 /* ATA-specific feature tests */ 2907 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { 2908 if (ata_id_is_cfa(id)) { 2909 /* CPRM may make this media unusable */ 2910 if (id[ATA_ID_CFA_KEY_MGMT] & 1) 2911 ata_dev_warn(dev, 2912 "supports DRM functions and may not be fully accessible\n"); 2913 snprintf(revbuf, 7, "CFA"); 2914 } else { 2915 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); 2916 /* Warn the user if the device has TPM extensions */ 2917 if (ata_id_has_tpm(id)) 2918 ata_dev_warn(dev, 2919 "supports DRM functions and may not be fully accessible\n"); 2920 } 2921 2922 dev->n_sectors = ata_id_n_sectors(id); 2923 2924 /* get current R/W Multiple count setting */ 2925 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) { 2926 unsigned int max = dev->id[47] & 0xff; 2927 unsigned int cnt = dev->id[59] & 0xff; 2928 /* only recognize/allow powers of two here */ 2929 if (is_power_of_2(max) && is_power_of_2(cnt)) 2930 if (cnt <= max) 2931 dev->multi_count = cnt; 2932 } 2933 2934 /* print device info to dmesg */ 2935 if (print_info) 2936 ata_dev_info(dev, "%s: %s, %s, max %s\n", 2937 revbuf, modelbuf, fwrevbuf, 2938 ata_mode_string(xfer_mask)); 2939 2940 if (ata_id_has_lba(id)) { 2941 rc = ata_dev_config_lba(dev); 2942 if (rc) 2943 return rc; 2944 } else { 2945 ata_dev_config_chs(dev); 2946 } 2947 2948 ata_dev_config_fua(dev); 2949 ata_dev_config_devslp(dev); 2950 ata_dev_config_sense_reporting(dev); 2951 ata_dev_config_zac(dev); 2952 ata_dev_config_trusted(dev); 2953 ata_dev_config_cpr(dev); 2954 ata_dev_config_cdl(dev); 2955 dev->cdb_len = 32; 2956 2957 if (print_info) 2958 ata_dev_print_features(dev); 2959 } 2960 2961 /* ATAPI-specific feature tests */ 2962 else if (dev->class == ATA_DEV_ATAPI) { 2963 const char *cdb_intr_string = ""; 2964 const char *atapi_an_string = ""; 2965 const char *dma_dir_string = ""; 2966 u32 sntf; 2967 2968 rc = atapi_cdb_len(id); 2969 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { 2970 ata_dev_warn(dev, "unsupported CDB len %d\n", rc); 2971 rc = -EINVAL; 2972 goto err_out_nosup; 2973 } 2974 dev->cdb_len = (unsigned int) rc; 2975 2976 /* Enable ATAPI AN if both the host and device have 2977 * the support. If PMP is attached, SNTF is required 2978 * to enable ATAPI AN to discern between PHY status 2979 * changed notifications and ATAPI ANs. 2980 */ 2981 if (atapi_an && 2982 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && 2983 (!sata_pmp_attached(ap) || 2984 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { 2985 /* issue SET feature command to turn this on */ 2986 err_mask = ata_dev_set_feature(dev, 2987 SETFEATURES_SATA_ENABLE, SATA_AN); 2988 if (err_mask) 2989 ata_dev_err(dev, 2990 "failed to enable ATAPI AN (err_mask=0x%x)\n", 2991 err_mask); 2992 else { 2993 dev->flags |= ATA_DFLAG_AN; 2994 atapi_an_string = ", ATAPI AN"; 2995 } 2996 } 2997 2998 if (ata_id_cdb_intr(dev->id)) { 2999 dev->flags |= ATA_DFLAG_CDB_INTR; 3000 cdb_intr_string = ", CDB intr"; 3001 } 3002 3003 if (atapi_dmadir || (dev->horkage & ATA_HORKAGE_ATAPI_DMADIR) || atapi_id_dmadir(dev->id)) { 3004 dev->flags |= ATA_DFLAG_DMADIR; 3005 dma_dir_string = ", DMADIR"; 3006 } 3007 3008 if (ata_id_has_da(dev->id)) { 3009 dev->flags |= ATA_DFLAG_DA; 3010 zpodd_init(dev); 3011 } 3012 3013 /* print device info to dmesg */ 3014 if (print_info) 3015 ata_dev_info(dev, 3016 "ATAPI: %s, %s, max %s%s%s%s\n", 3017 modelbuf, fwrevbuf, 3018 ata_mode_string(xfer_mask), 3019 cdb_intr_string, atapi_an_string, 3020 dma_dir_string); 3021 } 3022 3023 /* determine max_sectors */ 3024 dev->max_sectors = ATA_MAX_SECTORS; 3025 if (dev->flags & ATA_DFLAG_LBA48) 3026 dev->max_sectors = ATA_MAX_SECTORS_LBA48; 3027 3028 /* Limit PATA drive on SATA cable bridge transfers to udma5, 3029 200 sectors */ 3030 if (ata_dev_knobble(dev)) { 3031 if (print_info) 3032 ata_dev_info(dev, "applying bridge limits\n"); 3033 dev->udma_mask &= ATA_UDMA5; 3034 dev->max_sectors = ATA_MAX_SECTORS; 3035 } 3036 3037 if ((dev->class == ATA_DEV_ATAPI) && 3038 (atapi_command_packet_set(id) == TYPE_TAPE)) { 3039 dev->max_sectors = ATA_MAX_SECTORS_TAPE; 3040 dev->horkage |= ATA_HORKAGE_STUCK_ERR; 3041 } 3042 3043 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) 3044 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, 3045 dev->max_sectors); 3046 3047 if (dev->horkage & ATA_HORKAGE_MAX_SEC_1024) 3048 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_1024, 3049 dev->max_sectors); 3050 3051 if (dev->horkage & ATA_HORKAGE_MAX_SEC_LBA48) 3052 dev->max_sectors = ATA_MAX_SECTORS_LBA48; 3053 3054 if (ap->ops->dev_config) 3055 ap->ops->dev_config(dev); 3056 3057 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { 3058 /* Let the user know. We don't want to disallow opens for 3059 rescue purposes, or in case the vendor is just a blithering 3060 idiot. Do this after the dev_config call as some controllers 3061 with buggy firmware may want to avoid reporting false device 3062 bugs */ 3063 3064 if (print_info) { 3065 ata_dev_warn(dev, 3066 "Drive reports diagnostics failure. This may indicate a drive\n"); 3067 ata_dev_warn(dev, 3068 "fault or invalid emulation. Contact drive vendor for information.\n"); 3069 } 3070 } 3071 3072 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) { 3073 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n"); 3074 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n"); 3075 } 3076 3077 return 0; 3078 3079 err_out_nosup: 3080 return rc; 3081 } 3082 3083 /** 3084 * ata_cable_40wire - return 40 wire cable type 3085 * @ap: port 3086 * 3087 * Helper method for drivers which want to hardwire 40 wire cable 3088 * detection. 3089 */ 3090 3091 int ata_cable_40wire(struct ata_port *ap) 3092 { 3093 return ATA_CBL_PATA40; 3094 } 3095 EXPORT_SYMBOL_GPL(ata_cable_40wire); 3096 3097 /** 3098 * ata_cable_80wire - return 80 wire cable type 3099 * @ap: port 3100 * 3101 * Helper method for drivers which want to hardwire 80 wire cable 3102 * detection. 3103 */ 3104 3105 int ata_cable_80wire(struct ata_port *ap) 3106 { 3107 return ATA_CBL_PATA80; 3108 } 3109 EXPORT_SYMBOL_GPL(ata_cable_80wire); 3110 3111 /** 3112 * ata_cable_unknown - return unknown PATA cable. 3113 * @ap: port 3114 * 3115 * Helper method for drivers which have no PATA cable detection. 3116 */ 3117 3118 int ata_cable_unknown(struct ata_port *ap) 3119 { 3120 return ATA_CBL_PATA_UNK; 3121 } 3122 EXPORT_SYMBOL_GPL(ata_cable_unknown); 3123 3124 /** 3125 * ata_cable_ignore - return ignored PATA cable. 3126 * @ap: port 3127 * 3128 * Helper method for drivers which don't use cable type to limit 3129 * transfer mode. 3130 */ 3131 int ata_cable_ignore(struct ata_port *ap) 3132 { 3133 return ATA_CBL_PATA_IGN; 3134 } 3135 EXPORT_SYMBOL_GPL(ata_cable_ignore); 3136 3137 /** 3138 * ata_cable_sata - return SATA cable type 3139 * @ap: port 3140 * 3141 * Helper method for drivers which have SATA cables 3142 */ 3143 3144 int ata_cable_sata(struct ata_port *ap) 3145 { 3146 return ATA_CBL_SATA; 3147 } 3148 EXPORT_SYMBOL_GPL(ata_cable_sata); 3149 3150 /** 3151 * sata_print_link_status - Print SATA link status 3152 * @link: SATA link to printk link status about 3153 * 3154 * This function prints link speed and status of a SATA link. 3155 * 3156 * LOCKING: 3157 * None. 3158 */ 3159 static void sata_print_link_status(struct ata_link *link) 3160 { 3161 u32 sstatus, scontrol, tmp; 3162 3163 if (sata_scr_read(link, SCR_STATUS, &sstatus)) 3164 return; 3165 if (sata_scr_read(link, SCR_CONTROL, &scontrol)) 3166 return; 3167 3168 if (ata_phys_link_online(link)) { 3169 tmp = (sstatus >> 4) & 0xf; 3170 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n", 3171 sata_spd_string(tmp), sstatus, scontrol); 3172 } else { 3173 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n", 3174 sstatus, scontrol); 3175 } 3176 } 3177 3178 /** 3179 * ata_dev_pair - return other device on cable 3180 * @adev: device 3181 * 3182 * Obtain the other device on the same cable, or if none is 3183 * present NULL is returned 3184 */ 3185 3186 struct ata_device *ata_dev_pair(struct ata_device *adev) 3187 { 3188 struct ata_link *link = adev->link; 3189 struct ata_device *pair = &link->device[1 - adev->devno]; 3190 if (!ata_dev_enabled(pair)) 3191 return NULL; 3192 return pair; 3193 } 3194 EXPORT_SYMBOL_GPL(ata_dev_pair); 3195 3196 /** 3197 * sata_down_spd_limit - adjust SATA spd limit downward 3198 * @link: Link to adjust SATA spd limit for 3199 * @spd_limit: Additional limit 3200 * 3201 * Adjust SATA spd limit of @link downward. Note that this 3202 * function only adjusts the limit. The change must be applied 3203 * using sata_set_spd(). 3204 * 3205 * If @spd_limit is non-zero, the speed is limited to equal to or 3206 * lower than @spd_limit if such speed is supported. If 3207 * @spd_limit is slower than any supported speed, only the lowest 3208 * supported speed is allowed. 3209 * 3210 * LOCKING: 3211 * Inherited from caller. 3212 * 3213 * RETURNS: 3214 * 0 on success, negative errno on failure 3215 */ 3216 int sata_down_spd_limit(struct ata_link *link, u32 spd_limit) 3217 { 3218 u32 sstatus, spd, mask; 3219 int rc, bit; 3220 3221 if (!sata_scr_valid(link)) 3222 return -EOPNOTSUPP; 3223 3224 /* If SCR can be read, use it to determine the current SPD. 3225 * If not, use cached value in link->sata_spd. 3226 */ 3227 rc = sata_scr_read(link, SCR_STATUS, &sstatus); 3228 if (rc == 0 && ata_sstatus_online(sstatus)) 3229 spd = (sstatus >> 4) & 0xf; 3230 else 3231 spd = link->sata_spd; 3232 3233 mask = link->sata_spd_limit; 3234 if (mask <= 1) 3235 return -EINVAL; 3236 3237 /* unconditionally mask off the highest bit */ 3238 bit = fls(mask) - 1; 3239 mask &= ~(1 << bit); 3240 3241 /* 3242 * Mask off all speeds higher than or equal to the current one. At 3243 * this point, if current SPD is not available and we previously 3244 * recorded the link speed from SStatus, the driver has already 3245 * masked off the highest bit so mask should already be 1 or 0. 3246 * Otherwise, we should not force 1.5Gbps on a link where we have 3247 * not previously recorded speed from SStatus. Just return in this 3248 * case. 3249 */ 3250 if (spd > 1) 3251 mask &= (1 << (spd - 1)) - 1; 3252 else if (link->sata_spd) 3253 return -EINVAL; 3254 3255 /* were we already at the bottom? */ 3256 if (!mask) 3257 return -EINVAL; 3258 3259 if (spd_limit) { 3260 if (mask & ((1 << spd_limit) - 1)) 3261 mask &= (1 << spd_limit) - 1; 3262 else { 3263 bit = ffs(mask) - 1; 3264 mask = 1 << bit; 3265 } 3266 } 3267 3268 link->sata_spd_limit = mask; 3269 3270 ata_link_warn(link, "limiting SATA link speed to %s\n", 3271 sata_spd_string(fls(mask))); 3272 3273 return 0; 3274 } 3275 3276 #ifdef CONFIG_ATA_ACPI 3277 /** 3278 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration 3279 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine. 3280 * @cycle: cycle duration in ns 3281 * 3282 * Return matching xfer mode for @cycle. The returned mode is of 3283 * the transfer type specified by @xfer_shift. If @cycle is too 3284 * slow for @xfer_shift, 0xff is returned. If @cycle is faster 3285 * than the fastest known mode, the fasted mode is returned. 3286 * 3287 * LOCKING: 3288 * None. 3289 * 3290 * RETURNS: 3291 * Matching xfer_mode, 0xff if no match found. 3292 */ 3293 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle) 3294 { 3295 u8 base_mode = 0xff, last_mode = 0xff; 3296 const struct ata_xfer_ent *ent; 3297 const struct ata_timing *t; 3298 3299 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) 3300 if (ent->shift == xfer_shift) 3301 base_mode = ent->base; 3302 3303 for (t = ata_timing_find_mode(base_mode); 3304 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) { 3305 unsigned short this_cycle; 3306 3307 switch (xfer_shift) { 3308 case ATA_SHIFT_PIO: 3309 case ATA_SHIFT_MWDMA: 3310 this_cycle = t->cycle; 3311 break; 3312 case ATA_SHIFT_UDMA: 3313 this_cycle = t->udma; 3314 break; 3315 default: 3316 return 0xff; 3317 } 3318 3319 if (cycle > this_cycle) 3320 break; 3321 3322 last_mode = t->mode; 3323 } 3324 3325 return last_mode; 3326 } 3327 #endif 3328 3329 /** 3330 * ata_down_xfermask_limit - adjust dev xfer masks downward 3331 * @dev: Device to adjust xfer masks 3332 * @sel: ATA_DNXFER_* selector 3333 * 3334 * Adjust xfer masks of @dev downward. Note that this function 3335 * does not apply the change. Invoking ata_set_mode() afterwards 3336 * will apply the limit. 3337 * 3338 * LOCKING: 3339 * Inherited from caller. 3340 * 3341 * RETURNS: 3342 * 0 on success, negative errno on failure 3343 */ 3344 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) 3345 { 3346 char buf[32]; 3347 unsigned int orig_mask, xfer_mask; 3348 unsigned int pio_mask, mwdma_mask, udma_mask; 3349 int quiet, highbit; 3350 3351 quiet = !!(sel & ATA_DNXFER_QUIET); 3352 sel &= ~ATA_DNXFER_QUIET; 3353 3354 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, 3355 dev->mwdma_mask, 3356 dev->udma_mask); 3357 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); 3358 3359 switch (sel) { 3360 case ATA_DNXFER_PIO: 3361 highbit = fls(pio_mask) - 1; 3362 pio_mask &= ~(1 << highbit); 3363 break; 3364 3365 case ATA_DNXFER_DMA: 3366 if (udma_mask) { 3367 highbit = fls(udma_mask) - 1; 3368 udma_mask &= ~(1 << highbit); 3369 if (!udma_mask) 3370 return -ENOENT; 3371 } else if (mwdma_mask) { 3372 highbit = fls(mwdma_mask) - 1; 3373 mwdma_mask &= ~(1 << highbit); 3374 if (!mwdma_mask) 3375 return -ENOENT; 3376 } 3377 break; 3378 3379 case ATA_DNXFER_40C: 3380 udma_mask &= ATA_UDMA_MASK_40C; 3381 break; 3382 3383 case ATA_DNXFER_FORCE_PIO0: 3384 pio_mask &= 1; 3385 fallthrough; 3386 case ATA_DNXFER_FORCE_PIO: 3387 mwdma_mask = 0; 3388 udma_mask = 0; 3389 break; 3390 3391 default: 3392 BUG(); 3393 } 3394 3395 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); 3396 3397 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) 3398 return -ENOENT; 3399 3400 if (!quiet) { 3401 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) 3402 snprintf(buf, sizeof(buf), "%s:%s", 3403 ata_mode_string(xfer_mask), 3404 ata_mode_string(xfer_mask & ATA_MASK_PIO)); 3405 else 3406 snprintf(buf, sizeof(buf), "%s", 3407 ata_mode_string(xfer_mask)); 3408 3409 ata_dev_warn(dev, "limiting speed to %s\n", buf); 3410 } 3411 3412 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, 3413 &dev->udma_mask); 3414 3415 return 0; 3416 } 3417 3418 static int ata_dev_set_mode(struct ata_device *dev) 3419 { 3420 struct ata_port *ap = dev->link->ap; 3421 struct ata_eh_context *ehc = &dev->link->eh_context; 3422 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER; 3423 const char *dev_err_whine = ""; 3424 int ign_dev_err = 0; 3425 unsigned int err_mask = 0; 3426 int rc; 3427 3428 dev->flags &= ~ATA_DFLAG_PIO; 3429 if (dev->xfer_shift == ATA_SHIFT_PIO) 3430 dev->flags |= ATA_DFLAG_PIO; 3431 3432 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id)) 3433 dev_err_whine = " (SET_XFERMODE skipped)"; 3434 else { 3435 if (nosetxfer) 3436 ata_dev_warn(dev, 3437 "NOSETXFER but PATA detected - can't " 3438 "skip SETXFER, might malfunction\n"); 3439 err_mask = ata_dev_set_xfermode(dev); 3440 } 3441 3442 if (err_mask & ~AC_ERR_DEV) 3443 goto fail; 3444 3445 /* revalidate */ 3446 ehc->i.flags |= ATA_EHI_POST_SETMODE; 3447 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); 3448 ehc->i.flags &= ~ATA_EHI_POST_SETMODE; 3449 if (rc) 3450 return rc; 3451 3452 if (dev->xfer_shift == ATA_SHIFT_PIO) { 3453 /* Old CFA may refuse this command, which is just fine */ 3454 if (ata_id_is_cfa(dev->id)) 3455 ign_dev_err = 1; 3456 /* Catch several broken garbage emulations plus some pre 3457 ATA devices */ 3458 if (ata_id_major_version(dev->id) == 0 && 3459 dev->pio_mode <= XFER_PIO_2) 3460 ign_dev_err = 1; 3461 /* Some very old devices and some bad newer ones fail 3462 any kind of SET_XFERMODE request but support PIO0-2 3463 timings and no IORDY */ 3464 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2) 3465 ign_dev_err = 1; 3466 } 3467 /* Early MWDMA devices do DMA but don't allow DMA mode setting. 3468 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */ 3469 if (dev->xfer_shift == ATA_SHIFT_MWDMA && 3470 dev->dma_mode == XFER_MW_DMA_0 && 3471 (dev->id[63] >> 8) & 1) 3472 ign_dev_err = 1; 3473 3474 /* if the device is actually configured correctly, ignore dev err */ 3475 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id))) 3476 ign_dev_err = 1; 3477 3478 if (err_mask & AC_ERR_DEV) { 3479 if (!ign_dev_err) 3480 goto fail; 3481 else 3482 dev_err_whine = " (device error ignored)"; 3483 } 3484 3485 ata_dev_dbg(dev, "xfer_shift=%u, xfer_mode=0x%x\n", 3486 dev->xfer_shift, (int)dev->xfer_mode); 3487 3488 if (!(ehc->i.flags & ATA_EHI_QUIET) || 3489 ehc->i.flags & ATA_EHI_DID_HARDRESET) 3490 ata_dev_info(dev, "configured for %s%s\n", 3491 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)), 3492 dev_err_whine); 3493 3494 return 0; 3495 3496 fail: 3497 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask); 3498 return -EIO; 3499 } 3500 3501 /** 3502 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER 3503 * @link: link on which timings will be programmed 3504 * @r_failed_dev: out parameter for failed device 3505 * 3506 * Standard implementation of the function used to tune and set 3507 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If 3508 * ata_dev_set_mode() fails, pointer to the failing device is 3509 * returned in @r_failed_dev. 3510 * 3511 * LOCKING: 3512 * PCI/etc. bus probe sem. 3513 * 3514 * RETURNS: 3515 * 0 on success, negative errno otherwise 3516 */ 3517 3518 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) 3519 { 3520 struct ata_port *ap = link->ap; 3521 struct ata_device *dev; 3522 int rc = 0, used_dma = 0, found = 0; 3523 3524 /* step 1: calculate xfer_mask */ 3525 ata_for_each_dev(dev, link, ENABLED) { 3526 unsigned int pio_mask, dma_mask; 3527 unsigned int mode_mask; 3528 3529 mode_mask = ATA_DMA_MASK_ATA; 3530 if (dev->class == ATA_DEV_ATAPI) 3531 mode_mask = ATA_DMA_MASK_ATAPI; 3532 else if (ata_id_is_cfa(dev->id)) 3533 mode_mask = ATA_DMA_MASK_CFA; 3534 3535 ata_dev_xfermask(dev); 3536 ata_force_xfermask(dev); 3537 3538 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); 3539 3540 if (libata_dma_mask & mode_mask) 3541 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, 3542 dev->udma_mask); 3543 else 3544 dma_mask = 0; 3545 3546 dev->pio_mode = ata_xfer_mask2mode(pio_mask); 3547 dev->dma_mode = ata_xfer_mask2mode(dma_mask); 3548 3549 found = 1; 3550 if (ata_dma_enabled(dev)) 3551 used_dma = 1; 3552 } 3553 if (!found) 3554 goto out; 3555 3556 /* step 2: always set host PIO timings */ 3557 ata_for_each_dev(dev, link, ENABLED) { 3558 if (dev->pio_mode == 0xff) { 3559 ata_dev_warn(dev, "no PIO support\n"); 3560 rc = -EINVAL; 3561 goto out; 3562 } 3563 3564 dev->xfer_mode = dev->pio_mode; 3565 dev->xfer_shift = ATA_SHIFT_PIO; 3566 if (ap->ops->set_piomode) 3567 ap->ops->set_piomode(ap, dev); 3568 } 3569 3570 /* step 3: set host DMA timings */ 3571 ata_for_each_dev(dev, link, ENABLED) { 3572 if (!ata_dma_enabled(dev)) 3573 continue; 3574 3575 dev->xfer_mode = dev->dma_mode; 3576 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); 3577 if (ap->ops->set_dmamode) 3578 ap->ops->set_dmamode(ap, dev); 3579 } 3580 3581 /* step 4: update devices' xfer mode */ 3582 ata_for_each_dev(dev, link, ENABLED) { 3583 rc = ata_dev_set_mode(dev); 3584 if (rc) 3585 goto out; 3586 } 3587 3588 /* Record simplex status. If we selected DMA then the other 3589 * host channels are not permitted to do so. 3590 */ 3591 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) 3592 ap->host->simplex_claimed = ap; 3593 3594 out: 3595 if (rc) 3596 *r_failed_dev = dev; 3597 return rc; 3598 } 3599 EXPORT_SYMBOL_GPL(ata_do_set_mode); 3600 3601 /** 3602 * ata_wait_ready - wait for link to become ready 3603 * @link: link to be waited on 3604 * @deadline: deadline jiffies for the operation 3605 * @check_ready: callback to check link readiness 3606 * 3607 * Wait for @link to become ready. @check_ready should return 3608 * positive number if @link is ready, 0 if it isn't, -ENODEV if 3609 * link doesn't seem to be occupied, other errno for other error 3610 * conditions. 3611 * 3612 * Transient -ENODEV conditions are allowed for 3613 * ATA_TMOUT_FF_WAIT. 3614 * 3615 * LOCKING: 3616 * EH context. 3617 * 3618 * RETURNS: 3619 * 0 if @link is ready before @deadline; otherwise, -errno. 3620 */ 3621 int ata_wait_ready(struct ata_link *link, unsigned long deadline, 3622 int (*check_ready)(struct ata_link *link)) 3623 { 3624 unsigned long start = jiffies; 3625 unsigned long nodev_deadline; 3626 int warned = 0; 3627 3628 /* choose which 0xff timeout to use, read comment in libata.h */ 3629 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN) 3630 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG); 3631 else 3632 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT); 3633 3634 /* Slave readiness can't be tested separately from master. On 3635 * M/S emulation configuration, this function should be called 3636 * only on the master and it will handle both master and slave. 3637 */ 3638 WARN_ON(link == link->ap->slave_link); 3639 3640 if (time_after(nodev_deadline, deadline)) 3641 nodev_deadline = deadline; 3642 3643 while (1) { 3644 unsigned long now = jiffies; 3645 int ready, tmp; 3646 3647 ready = tmp = check_ready(link); 3648 if (ready > 0) 3649 return 0; 3650 3651 /* 3652 * -ENODEV could be transient. Ignore -ENODEV if link 3653 * is online. Also, some SATA devices take a long 3654 * time to clear 0xff after reset. Wait for 3655 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't 3656 * offline. 3657 * 3658 * Note that some PATA controllers (pata_ali) explode 3659 * if status register is read more than once when 3660 * there's no device attached. 3661 */ 3662 if (ready == -ENODEV) { 3663 if (ata_link_online(link)) 3664 ready = 0; 3665 else if ((link->ap->flags & ATA_FLAG_SATA) && 3666 !ata_link_offline(link) && 3667 time_before(now, nodev_deadline)) 3668 ready = 0; 3669 } 3670 3671 if (ready) 3672 return ready; 3673 if (time_after(now, deadline)) 3674 return -EBUSY; 3675 3676 if (!warned && time_after(now, start + 5 * HZ) && 3677 (deadline - now > 3 * HZ)) { 3678 ata_link_warn(link, 3679 "link is slow to respond, please be patient " 3680 "(ready=%d)\n", tmp); 3681 warned = 1; 3682 } 3683 3684 ata_msleep(link->ap, 50); 3685 } 3686 } 3687 3688 /** 3689 * ata_wait_after_reset - wait for link to become ready after reset 3690 * @link: link to be waited on 3691 * @deadline: deadline jiffies for the operation 3692 * @check_ready: callback to check link readiness 3693 * 3694 * Wait for @link to become ready after reset. 3695 * 3696 * LOCKING: 3697 * EH context. 3698 * 3699 * RETURNS: 3700 * 0 if @link is ready before @deadline; otherwise, -errno. 3701 */ 3702 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, 3703 int (*check_ready)(struct ata_link *link)) 3704 { 3705 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET); 3706 3707 return ata_wait_ready(link, deadline, check_ready); 3708 } 3709 EXPORT_SYMBOL_GPL(ata_wait_after_reset); 3710 3711 /** 3712 * ata_std_prereset - prepare for reset 3713 * @link: ATA link to be reset 3714 * @deadline: deadline jiffies for the operation 3715 * 3716 * @link is about to be reset. Initialize it. Failure from 3717 * prereset makes libata abort whole reset sequence and give up 3718 * that port, so prereset should be best-effort. It does its 3719 * best to prepare for reset sequence but if things go wrong, it 3720 * should just whine, not fail. 3721 * 3722 * LOCKING: 3723 * Kernel thread context (may sleep) 3724 * 3725 * RETURNS: 3726 * Always 0. 3727 */ 3728 int ata_std_prereset(struct ata_link *link, unsigned long deadline) 3729 { 3730 struct ata_port *ap = link->ap; 3731 struct ata_eh_context *ehc = &link->eh_context; 3732 const unsigned int *timing = sata_ehc_deb_timing(ehc); 3733 int rc; 3734 3735 /* if we're about to do hardreset, nothing more to do */ 3736 if (ehc->i.action & ATA_EH_HARDRESET) 3737 return 0; 3738 3739 /* if SATA, resume link */ 3740 if (ap->flags & ATA_FLAG_SATA) { 3741 rc = sata_link_resume(link, timing, deadline); 3742 /* whine about phy resume failure but proceed */ 3743 if (rc && rc != -EOPNOTSUPP) 3744 ata_link_warn(link, 3745 "failed to resume link for reset (errno=%d)\n", 3746 rc); 3747 } 3748 3749 /* no point in trying softreset on offline link */ 3750 if (ata_phys_link_offline(link)) 3751 ehc->i.action &= ~ATA_EH_SOFTRESET; 3752 3753 return 0; 3754 } 3755 EXPORT_SYMBOL_GPL(ata_std_prereset); 3756 3757 /** 3758 * sata_std_hardreset - COMRESET w/o waiting or classification 3759 * @link: link to reset 3760 * @class: resulting class of attached device 3761 * @deadline: deadline jiffies for the operation 3762 * 3763 * Standard SATA COMRESET w/o waiting or classification. 3764 * 3765 * LOCKING: 3766 * Kernel thread context (may sleep) 3767 * 3768 * RETURNS: 3769 * 0 if link offline, -EAGAIN if link online, -errno on errors. 3770 */ 3771 int sata_std_hardreset(struct ata_link *link, unsigned int *class, 3772 unsigned long deadline) 3773 { 3774 const unsigned int *timing = sata_ehc_deb_timing(&link->eh_context); 3775 bool online; 3776 int rc; 3777 3778 /* do hardreset */ 3779 rc = sata_link_hardreset(link, timing, deadline, &online, NULL); 3780 return online ? -EAGAIN : rc; 3781 } 3782 EXPORT_SYMBOL_GPL(sata_std_hardreset); 3783 3784 /** 3785 * ata_std_postreset - standard postreset callback 3786 * @link: the target ata_link 3787 * @classes: classes of attached devices 3788 * 3789 * This function is invoked after a successful reset. Note that 3790 * the device might have been reset more than once using 3791 * different reset methods before postreset is invoked. 3792 * 3793 * LOCKING: 3794 * Kernel thread context (may sleep) 3795 */ 3796 void ata_std_postreset(struct ata_link *link, unsigned int *classes) 3797 { 3798 u32 serror; 3799 3800 /* reset complete, clear SError */ 3801 if (!sata_scr_read(link, SCR_ERROR, &serror)) 3802 sata_scr_write(link, SCR_ERROR, serror); 3803 3804 /* print link status */ 3805 sata_print_link_status(link); 3806 } 3807 EXPORT_SYMBOL_GPL(ata_std_postreset); 3808 3809 /** 3810 * ata_dev_same_device - Determine whether new ID matches configured device 3811 * @dev: device to compare against 3812 * @new_class: class of the new device 3813 * @new_id: IDENTIFY page of the new device 3814 * 3815 * Compare @new_class and @new_id against @dev and determine 3816 * whether @dev is the device indicated by @new_class and 3817 * @new_id. 3818 * 3819 * LOCKING: 3820 * None. 3821 * 3822 * RETURNS: 3823 * 1 if @dev matches @new_class and @new_id, 0 otherwise. 3824 */ 3825 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, 3826 const u16 *new_id) 3827 { 3828 const u16 *old_id = dev->id; 3829 unsigned char model[2][ATA_ID_PROD_LEN + 1]; 3830 unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; 3831 3832 if (dev->class != new_class) { 3833 ata_dev_info(dev, "class mismatch %d != %d\n", 3834 dev->class, new_class); 3835 return 0; 3836 } 3837 3838 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); 3839 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); 3840 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); 3841 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); 3842 3843 if (strcmp(model[0], model[1])) { 3844 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n", 3845 model[0], model[1]); 3846 return 0; 3847 } 3848 3849 if (strcmp(serial[0], serial[1])) { 3850 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n", 3851 serial[0], serial[1]); 3852 return 0; 3853 } 3854 3855 return 1; 3856 } 3857 3858 /** 3859 * ata_dev_reread_id - Re-read IDENTIFY data 3860 * @dev: target ATA device 3861 * @readid_flags: read ID flags 3862 * 3863 * Re-read IDENTIFY page and make sure @dev is still attached to 3864 * the port. 3865 * 3866 * LOCKING: 3867 * Kernel thread context (may sleep) 3868 * 3869 * RETURNS: 3870 * 0 on success, negative errno otherwise 3871 */ 3872 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) 3873 { 3874 unsigned int class = dev->class; 3875 u16 *id = (void *)dev->link->ap->sector_buf; 3876 int rc; 3877 3878 /* read ID data */ 3879 rc = ata_dev_read_id(dev, &class, readid_flags, id); 3880 if (rc) 3881 return rc; 3882 3883 /* is the device still there? */ 3884 if (!ata_dev_same_device(dev, class, id)) 3885 return -ENODEV; 3886 3887 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); 3888 return 0; 3889 } 3890 3891 /** 3892 * ata_dev_revalidate - Revalidate ATA device 3893 * @dev: device to revalidate 3894 * @new_class: new class code 3895 * @readid_flags: read ID flags 3896 * 3897 * Re-read IDENTIFY page, make sure @dev is still attached to the 3898 * port and reconfigure it according to the new IDENTIFY page. 3899 * 3900 * LOCKING: 3901 * Kernel thread context (may sleep) 3902 * 3903 * RETURNS: 3904 * 0 on success, negative errno otherwise 3905 */ 3906 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, 3907 unsigned int readid_flags) 3908 { 3909 u64 n_sectors = dev->n_sectors; 3910 u64 n_native_sectors = dev->n_native_sectors; 3911 int rc; 3912 3913 if (!ata_dev_enabled(dev)) 3914 return -ENODEV; 3915 3916 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ 3917 if (ata_class_enabled(new_class) && new_class == ATA_DEV_PMP) { 3918 ata_dev_info(dev, "class mismatch %u != %u\n", 3919 dev->class, new_class); 3920 rc = -ENODEV; 3921 goto fail; 3922 } 3923 3924 /* re-read ID */ 3925 rc = ata_dev_reread_id(dev, readid_flags); 3926 if (rc) 3927 goto fail; 3928 3929 /* configure device according to the new ID */ 3930 rc = ata_dev_configure(dev); 3931 if (rc) 3932 goto fail; 3933 3934 /* verify n_sectors hasn't changed */ 3935 if (dev->class != ATA_DEV_ATA || !n_sectors || 3936 dev->n_sectors == n_sectors) 3937 return 0; 3938 3939 /* n_sectors has changed */ 3940 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n", 3941 (unsigned long long)n_sectors, 3942 (unsigned long long)dev->n_sectors); 3943 3944 /* 3945 * Something could have caused HPA to be unlocked 3946 * involuntarily. If n_native_sectors hasn't changed and the 3947 * new size matches it, keep the device. 3948 */ 3949 if (dev->n_native_sectors == n_native_sectors && 3950 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) { 3951 ata_dev_warn(dev, 3952 "new n_sectors matches native, probably " 3953 "late HPA unlock, n_sectors updated\n"); 3954 /* use the larger n_sectors */ 3955 return 0; 3956 } 3957 3958 /* 3959 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try 3960 * unlocking HPA in those cases. 3961 * 3962 * https://bugzilla.kernel.org/show_bug.cgi?id=15396 3963 */ 3964 if (dev->n_native_sectors == n_native_sectors && 3965 dev->n_sectors < n_sectors && n_sectors == n_native_sectors && 3966 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) { 3967 ata_dev_warn(dev, 3968 "old n_sectors matches native, probably " 3969 "late HPA lock, will try to unlock HPA\n"); 3970 /* try unlocking HPA */ 3971 dev->flags |= ATA_DFLAG_UNLOCK_HPA; 3972 rc = -EIO; 3973 } else 3974 rc = -ENODEV; 3975 3976 /* restore original n_[native_]sectors and fail */ 3977 dev->n_native_sectors = n_native_sectors; 3978 dev->n_sectors = n_sectors; 3979 fail: 3980 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc); 3981 return rc; 3982 } 3983 3984 struct ata_blacklist_entry { 3985 const char *model_num; 3986 const char *model_rev; 3987 unsigned long horkage; 3988 }; 3989 3990 static const struct ata_blacklist_entry ata_device_blacklist [] = { 3991 /* Devices with DMA related problems under Linux */ 3992 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, 3993 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, 3994 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, 3995 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, 3996 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, 3997 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, 3998 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, 3999 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, 4000 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, 4001 { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA }, 4002 { "CRD-84", NULL, ATA_HORKAGE_NODMA }, 4003 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, 4004 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, 4005 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, 4006 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, 4007 { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA }, 4008 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, 4009 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, 4010 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, 4011 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, 4012 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, 4013 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, 4014 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, 4015 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, 4016 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, 4017 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, 4018 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA }, 4019 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, 4020 { " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA }, 4021 { "VRFDFC22048UCHC-TE*", NULL, ATA_HORKAGE_NODMA }, 4022 /* Odd clown on sil3726/4726 PMPs */ 4023 { "Config Disk", NULL, ATA_HORKAGE_DISABLE }, 4024 /* Similar story with ASMedia 1092 */ 4025 { "ASMT109x- Config", NULL, ATA_HORKAGE_DISABLE }, 4026 4027 /* Weird ATAPI devices */ 4028 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, 4029 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA }, 4030 { "Slimtype DVD A DS8A8SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 }, 4031 { "Slimtype DVD A DS8A9SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 }, 4032 4033 /* 4034 * Causes silent data corruption with higher max sects. 4035 * http://lkml.kernel.org/g/x49wpy40ysk.fsf@segfault.boston.devel.redhat.com 4036 */ 4037 { "ST380013AS", "3.20", ATA_HORKAGE_MAX_SEC_1024 }, 4038 4039 /* 4040 * These devices time out with higher max sects. 4041 * https://bugzilla.kernel.org/show_bug.cgi?id=121671 4042 */ 4043 { "LITEON CX1-JB*-HP", NULL, ATA_HORKAGE_MAX_SEC_1024 }, 4044 { "LITEON EP1-*", NULL, ATA_HORKAGE_MAX_SEC_1024 }, 4045 4046 /* Devices we expect to fail diagnostics */ 4047 4048 /* Devices where NCQ should be avoided */ 4049 /* NCQ is slow */ 4050 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, 4051 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ }, 4052 /* http://thread.gmane.org/gmane.linux.ide/14907 */ 4053 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, 4054 /* NCQ is broken */ 4055 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ }, 4056 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ }, 4057 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ }, 4058 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ }, 4059 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ }, 4060 4061 /* Seagate NCQ + FLUSH CACHE firmware bug */ 4062 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | 4063 ATA_HORKAGE_FIRMWARE_WARN }, 4064 4065 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | 4066 ATA_HORKAGE_FIRMWARE_WARN }, 4067 4068 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | 4069 ATA_HORKAGE_FIRMWARE_WARN }, 4070 4071 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | 4072 ATA_HORKAGE_FIRMWARE_WARN }, 4073 4074 /* drives which fail FPDMA_AA activation (some may freeze afterwards) 4075 the ST disks also have LPM issues */ 4076 { "ST1000LM024 HN-M101MBB", NULL, ATA_HORKAGE_BROKEN_FPDMA_AA | 4077 ATA_HORKAGE_NOLPM }, 4078 { "VB0250EAVER", "HPG7", ATA_HORKAGE_BROKEN_FPDMA_AA }, 4079 4080 /* Blacklist entries taken from Silicon Image 3124/3132 4081 Windows driver .inf file - also several Linux problem reports */ 4082 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ }, 4083 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ }, 4084 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ }, 4085 4086 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */ 4087 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ }, 4088 4089 /* Sandisk SD7/8/9s lock up hard on large trims */ 4090 { "SanDisk SD[789]*", NULL, ATA_HORKAGE_MAX_TRIM_128M }, 4091 4092 /* devices which puke on READ_NATIVE_MAX */ 4093 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA }, 4094 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA }, 4095 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA }, 4096 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA }, 4097 4098 /* this one allows HPA unlocking but fails IOs on the area */ 4099 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA }, 4100 4101 /* Devices which report 1 sector over size HPA */ 4102 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE }, 4103 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE }, 4104 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE }, 4105 4106 /* Devices which get the IVB wrong */ 4107 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB }, 4108 /* Maybe we should just blacklist TSSTcorp... */ 4109 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB }, 4110 4111 /* Devices that do not need bridging limits applied */ 4112 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK }, 4113 { "BUFFALO HD-QSU2/R5", NULL, ATA_HORKAGE_BRIDGE_OK }, 4114 4115 /* Devices which aren't very happy with higher link speeds */ 4116 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS }, 4117 { "Seagate FreeAgent GoFlex", NULL, ATA_HORKAGE_1_5_GBPS }, 4118 4119 /* 4120 * Devices which choke on SETXFER. Applies only if both the 4121 * device and controller are SATA. 4122 */ 4123 { "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER }, 4124 { "PIONEER DVD-RW DVRTD08A", NULL, ATA_HORKAGE_NOSETXFER }, 4125 { "PIONEER DVD-RW DVR-215", NULL, ATA_HORKAGE_NOSETXFER }, 4126 { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER }, 4127 { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER }, 4128 4129 /* These specific Pioneer models have LPM issues */ 4130 { "PIONEER BD-RW BDR-207M", NULL, ATA_HORKAGE_NOLPM }, 4131 { "PIONEER BD-RW BDR-205", NULL, ATA_HORKAGE_NOLPM }, 4132 4133 /* Crucial BX100 SSD 500GB has broken LPM support */ 4134 { "CT500BX100SSD1", NULL, ATA_HORKAGE_NOLPM }, 4135 4136 /* 512GB MX100 with MU01 firmware has both queued TRIM and LPM issues */ 4137 { "Crucial_CT512MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM | 4138 ATA_HORKAGE_ZERO_AFTER_TRIM | 4139 ATA_HORKAGE_NOLPM }, 4140 /* 512GB MX100 with newer firmware has only LPM issues */ 4141 { "Crucial_CT512MX100*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM | 4142 ATA_HORKAGE_NOLPM }, 4143 4144 /* 480GB+ M500 SSDs have both queued TRIM and LPM issues */ 4145 { "Crucial_CT480M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | 4146 ATA_HORKAGE_ZERO_AFTER_TRIM | 4147 ATA_HORKAGE_NOLPM }, 4148 { "Crucial_CT960M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | 4149 ATA_HORKAGE_ZERO_AFTER_TRIM | 4150 ATA_HORKAGE_NOLPM }, 4151 4152 /* These specific Samsung models/firmware-revs do not handle LPM well */ 4153 { "SAMSUNG MZMPC128HBFU-000MV", "CXM14M1Q", ATA_HORKAGE_NOLPM }, 4154 { "SAMSUNG SSD PM830 mSATA *", "CXM13D1Q", ATA_HORKAGE_NOLPM }, 4155 { "SAMSUNG MZ7TD256HAFV-000L9", NULL, ATA_HORKAGE_NOLPM }, 4156 { "SAMSUNG MZ7TE512HMHP-000L1", "EXT06L0Q", ATA_HORKAGE_NOLPM }, 4157 4158 /* devices that don't properly handle queued TRIM commands */ 4159 { "Micron_M500IT_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM | 4160 ATA_HORKAGE_ZERO_AFTER_TRIM }, 4161 { "Micron_M500_*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | 4162 ATA_HORKAGE_ZERO_AFTER_TRIM }, 4163 { "Micron_M5[15]0_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM | 4164 ATA_HORKAGE_ZERO_AFTER_TRIM }, 4165 { "Micron_1100_*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | 4166 ATA_HORKAGE_ZERO_AFTER_TRIM, }, 4167 { "Crucial_CT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | 4168 ATA_HORKAGE_ZERO_AFTER_TRIM }, 4169 { "Crucial_CT*M550*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM | 4170 ATA_HORKAGE_ZERO_AFTER_TRIM }, 4171 { "Crucial_CT*MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM | 4172 ATA_HORKAGE_ZERO_AFTER_TRIM }, 4173 { "Samsung SSD 840 EVO*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | 4174 ATA_HORKAGE_NO_DMA_LOG | 4175 ATA_HORKAGE_ZERO_AFTER_TRIM }, 4176 { "Samsung SSD 840*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | 4177 ATA_HORKAGE_ZERO_AFTER_TRIM }, 4178 { "Samsung SSD 850*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | 4179 ATA_HORKAGE_ZERO_AFTER_TRIM }, 4180 { "Samsung SSD 860*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | 4181 ATA_HORKAGE_ZERO_AFTER_TRIM | 4182 ATA_HORKAGE_NO_NCQ_ON_ATI }, 4183 { "Samsung SSD 870*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | 4184 ATA_HORKAGE_ZERO_AFTER_TRIM | 4185 ATA_HORKAGE_NO_NCQ_ON_ATI }, 4186 { "SAMSUNG*MZ7LH*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | 4187 ATA_HORKAGE_ZERO_AFTER_TRIM | 4188 ATA_HORKAGE_NO_NCQ_ON_ATI, }, 4189 { "FCCT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | 4190 ATA_HORKAGE_ZERO_AFTER_TRIM }, 4191 4192 /* devices that don't properly handle TRIM commands */ 4193 { "SuperSSpeed S238*", NULL, ATA_HORKAGE_NOTRIM }, 4194 { "M88V29*", NULL, ATA_HORKAGE_NOTRIM }, 4195 4196 /* 4197 * As defined, the DRAT (Deterministic Read After Trim) and RZAT 4198 * (Return Zero After Trim) flags in the ATA Command Set are 4199 * unreliable in the sense that they only define what happens if 4200 * the device successfully executed the DSM TRIM command. TRIM 4201 * is only advisory, however, and the device is free to silently 4202 * ignore all or parts of the request. 4203 * 4204 * Whitelist drives that are known to reliably return zeroes 4205 * after TRIM. 4206 */ 4207 4208 /* 4209 * The intel 510 drive has buggy DRAT/RZAT. Explicitly exclude 4210 * that model before whitelisting all other intel SSDs. 4211 */ 4212 { "INTEL*SSDSC2MH*", NULL, 0 }, 4213 4214 { "Micron*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM }, 4215 { "Crucial*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM }, 4216 { "INTEL*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM }, 4217 { "SSD*INTEL*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM }, 4218 { "Samsung*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM }, 4219 { "SAMSUNG*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM }, 4220 { "SAMSUNG*MZ7KM*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM }, 4221 { "ST[1248][0248]0[FH]*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM }, 4222 4223 /* 4224 * Some WD SATA-I drives spin up and down erratically when the link 4225 * is put into the slumber mode. We don't have full list of the 4226 * affected devices. Disable LPM if the device matches one of the 4227 * known prefixes and is SATA-1. As a side effect LPM partial is 4228 * lost too. 4229 * 4230 * https://bugzilla.kernel.org/show_bug.cgi?id=57211 4231 */ 4232 { "WDC WD800JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, 4233 { "WDC WD1200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, 4234 { "WDC WD1600JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, 4235 { "WDC WD2000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, 4236 { "WDC WD2500JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, 4237 { "WDC WD3000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, 4238 { "WDC WD3200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, 4239 4240 /* 4241 * This sata dom device goes on a walkabout when the ATA_LOG_DIRECTORY 4242 * log page is accessed. Ensure we never ask for this log page with 4243 * these devices. 4244 */ 4245 { "SATADOM-ML 3ME", NULL, ATA_HORKAGE_NO_LOG_DIR }, 4246 4247 /* Buggy FUA */ 4248 { "Maxtor", "BANC1G10", ATA_HORKAGE_NO_FUA }, 4249 { "WDC*WD2500J*", NULL, ATA_HORKAGE_NO_FUA }, 4250 { "OCZ-VERTEX*", NULL, ATA_HORKAGE_NO_FUA }, 4251 { "INTEL*SSDSC2CT*", NULL, ATA_HORKAGE_NO_FUA }, 4252 4253 /* End Marker */ 4254 { } 4255 }; 4256 4257 static unsigned long ata_dev_blacklisted(const struct ata_device *dev) 4258 { 4259 unsigned char model_num[ATA_ID_PROD_LEN + 1]; 4260 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; 4261 const struct ata_blacklist_entry *ad = ata_device_blacklist; 4262 4263 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 4264 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); 4265 4266 while (ad->model_num) { 4267 if (glob_match(ad->model_num, model_num)) { 4268 if (ad->model_rev == NULL) 4269 return ad->horkage; 4270 if (glob_match(ad->model_rev, model_rev)) 4271 return ad->horkage; 4272 } 4273 ad++; 4274 } 4275 return 0; 4276 } 4277 4278 static int ata_dma_blacklisted(const struct ata_device *dev) 4279 { 4280 /* We don't support polling DMA. 4281 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) 4282 * if the LLDD handles only interrupts in the HSM_ST_LAST state. 4283 */ 4284 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && 4285 (dev->flags & ATA_DFLAG_CDB_INTR)) 4286 return 1; 4287 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; 4288 } 4289 4290 /** 4291 * ata_is_40wire - check drive side detection 4292 * @dev: device 4293 * 4294 * Perform drive side detection decoding, allowing for device vendors 4295 * who can't follow the documentation. 4296 */ 4297 4298 static int ata_is_40wire(struct ata_device *dev) 4299 { 4300 if (dev->horkage & ATA_HORKAGE_IVB) 4301 return ata_drive_40wire_relaxed(dev->id); 4302 return ata_drive_40wire(dev->id); 4303 } 4304 4305 /** 4306 * cable_is_40wire - 40/80/SATA decider 4307 * @ap: port to consider 4308 * 4309 * This function encapsulates the policy for speed management 4310 * in one place. At the moment we don't cache the result but 4311 * there is a good case for setting ap->cbl to the result when 4312 * we are called with unknown cables (and figuring out if it 4313 * impacts hotplug at all). 4314 * 4315 * Return 1 if the cable appears to be 40 wire. 4316 */ 4317 4318 static int cable_is_40wire(struct ata_port *ap) 4319 { 4320 struct ata_link *link; 4321 struct ata_device *dev; 4322 4323 /* If the controller thinks we are 40 wire, we are. */ 4324 if (ap->cbl == ATA_CBL_PATA40) 4325 return 1; 4326 4327 /* If the controller thinks we are 80 wire, we are. */ 4328 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA) 4329 return 0; 4330 4331 /* If the system is known to be 40 wire short cable (eg 4332 * laptop), then we allow 80 wire modes even if the drive 4333 * isn't sure. 4334 */ 4335 if (ap->cbl == ATA_CBL_PATA40_SHORT) 4336 return 0; 4337 4338 /* If the controller doesn't know, we scan. 4339 * 4340 * Note: We look for all 40 wire detects at this point. Any 4341 * 80 wire detect is taken to be 80 wire cable because 4342 * - in many setups only the one drive (slave if present) will 4343 * give a valid detect 4344 * - if you have a non detect capable drive you don't want it 4345 * to colour the choice 4346 */ 4347 ata_for_each_link(link, ap, EDGE) { 4348 ata_for_each_dev(dev, link, ENABLED) { 4349 if (!ata_is_40wire(dev)) 4350 return 0; 4351 } 4352 } 4353 return 1; 4354 } 4355 4356 /** 4357 * ata_dev_xfermask - Compute supported xfermask of the given device 4358 * @dev: Device to compute xfermask for 4359 * 4360 * Compute supported xfermask of @dev and store it in 4361 * dev->*_mask. This function is responsible for applying all 4362 * known limits including host controller limits, device 4363 * blacklist, etc... 4364 * 4365 * LOCKING: 4366 * None. 4367 */ 4368 static void ata_dev_xfermask(struct ata_device *dev) 4369 { 4370 struct ata_link *link = dev->link; 4371 struct ata_port *ap = link->ap; 4372 struct ata_host *host = ap->host; 4373 unsigned int xfer_mask; 4374 4375 /* controller modes available */ 4376 xfer_mask = ata_pack_xfermask(ap->pio_mask, 4377 ap->mwdma_mask, ap->udma_mask); 4378 4379 /* drive modes available */ 4380 xfer_mask &= ata_pack_xfermask(dev->pio_mask, 4381 dev->mwdma_mask, dev->udma_mask); 4382 xfer_mask &= ata_id_xfermask(dev->id); 4383 4384 /* 4385 * CFA Advanced TrueIDE timings are not allowed on a shared 4386 * cable 4387 */ 4388 if (ata_dev_pair(dev)) { 4389 /* No PIO5 or PIO6 */ 4390 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); 4391 /* No MWDMA3 or MWDMA 4 */ 4392 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); 4393 } 4394 4395 if (ata_dma_blacklisted(dev)) { 4396 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 4397 ata_dev_warn(dev, 4398 "device is on DMA blacklist, disabling DMA\n"); 4399 } 4400 4401 if ((host->flags & ATA_HOST_SIMPLEX) && 4402 host->simplex_claimed && host->simplex_claimed != ap) { 4403 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); 4404 ata_dev_warn(dev, 4405 "simplex DMA is claimed by other device, disabling DMA\n"); 4406 } 4407 4408 if (ap->flags & ATA_FLAG_NO_IORDY) 4409 xfer_mask &= ata_pio_mask_no_iordy(dev); 4410 4411 if (ap->ops->mode_filter) 4412 xfer_mask = ap->ops->mode_filter(dev, xfer_mask); 4413 4414 /* Apply cable rule here. Don't apply it early because when 4415 * we handle hot plug the cable type can itself change. 4416 * Check this last so that we know if the transfer rate was 4417 * solely limited by the cable. 4418 * Unknown or 80 wire cables reported host side are checked 4419 * drive side as well. Cases where we know a 40wire cable 4420 * is used safely for 80 are not checked here. 4421 */ 4422 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) 4423 /* UDMA/44 or higher would be available */ 4424 if (cable_is_40wire(ap)) { 4425 ata_dev_warn(dev, 4426 "limited to UDMA/33 due to 40-wire cable\n"); 4427 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); 4428 } 4429 4430 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, 4431 &dev->mwdma_mask, &dev->udma_mask); 4432 } 4433 4434 /** 4435 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command 4436 * @dev: Device to which command will be sent 4437 * 4438 * Issue SET FEATURES - XFER MODE command to device @dev 4439 * on port @ap. 4440 * 4441 * LOCKING: 4442 * PCI/etc. bus probe sem. 4443 * 4444 * RETURNS: 4445 * 0 on success, AC_ERR_* mask otherwise. 4446 */ 4447 4448 static unsigned int ata_dev_set_xfermode(struct ata_device *dev) 4449 { 4450 struct ata_taskfile tf; 4451 4452 /* set up set-features taskfile */ 4453 ata_dev_dbg(dev, "set features - xfer mode\n"); 4454 4455 /* Some controllers and ATAPI devices show flaky interrupt 4456 * behavior after setting xfer mode. Use polling instead. 4457 */ 4458 ata_tf_init(dev, &tf); 4459 tf.command = ATA_CMD_SET_FEATURES; 4460 tf.feature = SETFEATURES_XFER; 4461 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; 4462 tf.protocol = ATA_PROT_NODATA; 4463 /* If we are using IORDY we must send the mode setting command */ 4464 if (ata_pio_need_iordy(dev)) 4465 tf.nsect = dev->xfer_mode; 4466 /* If the device has IORDY and the controller does not - turn it off */ 4467 else if (ata_id_has_iordy(dev->id)) 4468 tf.nsect = 0x01; 4469 else /* In the ancient relic department - skip all of this */ 4470 return 0; 4471 4472 /* 4473 * On some disks, this command causes spin-up, so we need longer 4474 * timeout. 4475 */ 4476 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 15000); 4477 } 4478 4479 /** 4480 * ata_dev_set_feature - Issue SET FEATURES 4481 * @dev: Device to which command will be sent 4482 * @subcmd: The SET FEATURES subcommand to be sent 4483 * @action: The sector count represents a subcommand specific action 4484 * 4485 * Issue SET FEATURES command to device @dev on port @ap with sector count 4486 * 4487 * LOCKING: 4488 * PCI/etc. bus probe sem. 4489 * 4490 * RETURNS: 4491 * 0 on success, AC_ERR_* mask otherwise. 4492 */ 4493 unsigned int ata_dev_set_feature(struct ata_device *dev, u8 subcmd, u8 action) 4494 { 4495 struct ata_taskfile tf; 4496 unsigned int timeout = 0; 4497 4498 /* set up set-features taskfile */ 4499 ata_dev_dbg(dev, "set features\n"); 4500 4501 ata_tf_init(dev, &tf); 4502 tf.command = ATA_CMD_SET_FEATURES; 4503 tf.feature = subcmd; 4504 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 4505 tf.protocol = ATA_PROT_NODATA; 4506 tf.nsect = action; 4507 4508 if (subcmd == SETFEATURES_SPINUP) 4509 timeout = ata_probe_timeout ? 4510 ata_probe_timeout * 1000 : SETFEATURES_SPINUP_TIMEOUT; 4511 4512 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, timeout); 4513 } 4514 EXPORT_SYMBOL_GPL(ata_dev_set_feature); 4515 4516 /** 4517 * ata_dev_init_params - Issue INIT DEV PARAMS command 4518 * @dev: Device to which command will be sent 4519 * @heads: Number of heads (taskfile parameter) 4520 * @sectors: Number of sectors (taskfile parameter) 4521 * 4522 * LOCKING: 4523 * Kernel thread context (may sleep) 4524 * 4525 * RETURNS: 4526 * 0 on success, AC_ERR_* mask otherwise. 4527 */ 4528 static unsigned int ata_dev_init_params(struct ata_device *dev, 4529 u16 heads, u16 sectors) 4530 { 4531 struct ata_taskfile tf; 4532 unsigned int err_mask; 4533 4534 /* Number of sectors per track 1-255. Number of heads 1-16 */ 4535 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) 4536 return AC_ERR_INVALID; 4537 4538 /* set up init dev params taskfile */ 4539 ata_dev_dbg(dev, "init dev params \n"); 4540 4541 ata_tf_init(dev, &tf); 4542 tf.command = ATA_CMD_INIT_DEV_PARAMS; 4543 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; 4544 tf.protocol = ATA_PROT_NODATA; 4545 tf.nsect = sectors; 4546 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ 4547 4548 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); 4549 /* A clean abort indicates an original or just out of spec drive 4550 and we should continue as we issue the setup based on the 4551 drive reported working geometry */ 4552 if (err_mask == AC_ERR_DEV && (tf.error & ATA_ABORTED)) 4553 err_mask = 0; 4554 4555 return err_mask; 4556 } 4557 4558 /** 4559 * atapi_check_dma - Check whether ATAPI DMA can be supported 4560 * @qc: Metadata associated with taskfile to check 4561 * 4562 * Allow low-level driver to filter ATA PACKET commands, returning 4563 * a status indicating whether or not it is OK to use DMA for the 4564 * supplied PACKET command. 4565 * 4566 * LOCKING: 4567 * spin_lock_irqsave(host lock) 4568 * 4569 * RETURNS: 0 when ATAPI DMA can be used 4570 * nonzero otherwise 4571 */ 4572 int atapi_check_dma(struct ata_queued_cmd *qc) 4573 { 4574 struct ata_port *ap = qc->ap; 4575 4576 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a 4577 * few ATAPI devices choke on such DMA requests. 4578 */ 4579 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) && 4580 unlikely(qc->nbytes & 15)) 4581 return 1; 4582 4583 if (ap->ops->check_atapi_dma) 4584 return ap->ops->check_atapi_dma(qc); 4585 4586 return 0; 4587 } 4588 4589 /** 4590 * ata_std_qc_defer - Check whether a qc needs to be deferred 4591 * @qc: ATA command in question 4592 * 4593 * Non-NCQ commands cannot run with any other command, NCQ or 4594 * not. As upper layer only knows the queue depth, we are 4595 * responsible for maintaining exclusion. This function checks 4596 * whether a new command @qc can be issued. 4597 * 4598 * LOCKING: 4599 * spin_lock_irqsave(host lock) 4600 * 4601 * RETURNS: 4602 * ATA_DEFER_* if deferring is needed, 0 otherwise. 4603 */ 4604 int ata_std_qc_defer(struct ata_queued_cmd *qc) 4605 { 4606 struct ata_link *link = qc->dev->link; 4607 4608 if (ata_is_ncq(qc->tf.protocol)) { 4609 if (!ata_tag_valid(link->active_tag)) 4610 return 0; 4611 } else { 4612 if (!ata_tag_valid(link->active_tag) && !link->sactive) 4613 return 0; 4614 } 4615 4616 return ATA_DEFER_LINK; 4617 } 4618 EXPORT_SYMBOL_GPL(ata_std_qc_defer); 4619 4620 enum ata_completion_errors ata_noop_qc_prep(struct ata_queued_cmd *qc) 4621 { 4622 return AC_ERR_OK; 4623 } 4624 EXPORT_SYMBOL_GPL(ata_noop_qc_prep); 4625 4626 /** 4627 * ata_sg_init - Associate command with scatter-gather table. 4628 * @qc: Command to be associated 4629 * @sg: Scatter-gather table. 4630 * @n_elem: Number of elements in s/g table. 4631 * 4632 * Initialize the data-related elements of queued_cmd @qc 4633 * to point to a scatter-gather table @sg, containing @n_elem 4634 * elements. 4635 * 4636 * LOCKING: 4637 * spin_lock_irqsave(host lock) 4638 */ 4639 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, 4640 unsigned int n_elem) 4641 { 4642 qc->sg = sg; 4643 qc->n_elem = n_elem; 4644 qc->cursg = qc->sg; 4645 } 4646 4647 #ifdef CONFIG_HAS_DMA 4648 4649 /** 4650 * ata_sg_clean - Unmap DMA memory associated with command 4651 * @qc: Command containing DMA memory to be released 4652 * 4653 * Unmap all mapped DMA memory associated with this command. 4654 * 4655 * LOCKING: 4656 * spin_lock_irqsave(host lock) 4657 */ 4658 static void ata_sg_clean(struct ata_queued_cmd *qc) 4659 { 4660 struct ata_port *ap = qc->ap; 4661 struct scatterlist *sg = qc->sg; 4662 int dir = qc->dma_dir; 4663 4664 WARN_ON_ONCE(sg == NULL); 4665 4666 if (qc->n_elem) 4667 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir); 4668 4669 qc->flags &= ~ATA_QCFLAG_DMAMAP; 4670 qc->sg = NULL; 4671 } 4672 4673 /** 4674 * ata_sg_setup - DMA-map the scatter-gather table associated with a command. 4675 * @qc: Command with scatter-gather table to be mapped. 4676 * 4677 * DMA-map the scatter-gather table associated with queued_cmd @qc. 4678 * 4679 * LOCKING: 4680 * spin_lock_irqsave(host lock) 4681 * 4682 * RETURNS: 4683 * Zero on success, negative on error. 4684 * 4685 */ 4686 static int ata_sg_setup(struct ata_queued_cmd *qc) 4687 { 4688 struct ata_port *ap = qc->ap; 4689 unsigned int n_elem; 4690 4691 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir); 4692 if (n_elem < 1) 4693 return -1; 4694 4695 qc->orig_n_elem = qc->n_elem; 4696 qc->n_elem = n_elem; 4697 qc->flags |= ATA_QCFLAG_DMAMAP; 4698 4699 return 0; 4700 } 4701 4702 #else /* !CONFIG_HAS_DMA */ 4703 4704 static inline void ata_sg_clean(struct ata_queued_cmd *qc) {} 4705 static inline int ata_sg_setup(struct ata_queued_cmd *qc) { return -1; } 4706 4707 #endif /* !CONFIG_HAS_DMA */ 4708 4709 /** 4710 * swap_buf_le16 - swap halves of 16-bit words in place 4711 * @buf: Buffer to swap 4712 * @buf_words: Number of 16-bit words in buffer. 4713 * 4714 * Swap halves of 16-bit words if needed to convert from 4715 * little-endian byte order to native cpu byte order, or 4716 * vice-versa. 4717 * 4718 * LOCKING: 4719 * Inherited from caller. 4720 */ 4721 void swap_buf_le16(u16 *buf, unsigned int buf_words) 4722 { 4723 #ifdef __BIG_ENDIAN 4724 unsigned int i; 4725 4726 for (i = 0; i < buf_words; i++) 4727 buf[i] = le16_to_cpu(buf[i]); 4728 #endif /* __BIG_ENDIAN */ 4729 } 4730 4731 /** 4732 * ata_qc_free - free unused ata_queued_cmd 4733 * @qc: Command to complete 4734 * 4735 * Designed to free unused ata_queued_cmd object 4736 * in case something prevents using it. 4737 * 4738 * LOCKING: 4739 * spin_lock_irqsave(host lock) 4740 */ 4741 void ata_qc_free(struct ata_queued_cmd *qc) 4742 { 4743 qc->flags = 0; 4744 if (ata_tag_valid(qc->tag)) 4745 qc->tag = ATA_TAG_POISON; 4746 } 4747 4748 void __ata_qc_complete(struct ata_queued_cmd *qc) 4749 { 4750 struct ata_port *ap; 4751 struct ata_link *link; 4752 4753 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ 4754 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE)); 4755 ap = qc->ap; 4756 link = qc->dev->link; 4757 4758 if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) 4759 ata_sg_clean(qc); 4760 4761 /* command should be marked inactive atomically with qc completion */ 4762 if (ata_is_ncq(qc->tf.protocol)) { 4763 link->sactive &= ~(1 << qc->hw_tag); 4764 if (!link->sactive) 4765 ap->nr_active_links--; 4766 } else { 4767 link->active_tag = ATA_TAG_POISON; 4768 ap->nr_active_links--; 4769 } 4770 4771 /* clear exclusive status */ 4772 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && 4773 ap->excl_link == link)) 4774 ap->excl_link = NULL; 4775 4776 /* atapi: mark qc as inactive to prevent the interrupt handler 4777 * from completing the command twice later, before the error handler 4778 * is called. (when rc != 0 and atapi request sense is needed) 4779 */ 4780 qc->flags &= ~ATA_QCFLAG_ACTIVE; 4781 ap->qc_active &= ~(1ULL << qc->tag); 4782 4783 /* call completion callback */ 4784 qc->complete_fn(qc); 4785 } 4786 4787 static void fill_result_tf(struct ata_queued_cmd *qc) 4788 { 4789 struct ata_port *ap = qc->ap; 4790 4791 qc->result_tf.flags = qc->tf.flags; 4792 ap->ops->qc_fill_rtf(qc); 4793 } 4794 4795 static void ata_verify_xfer(struct ata_queued_cmd *qc) 4796 { 4797 struct ata_device *dev = qc->dev; 4798 4799 if (!ata_is_data(qc->tf.protocol)) 4800 return; 4801 4802 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol)) 4803 return; 4804 4805 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER; 4806 } 4807 4808 /** 4809 * ata_qc_complete - Complete an active ATA command 4810 * @qc: Command to complete 4811 * 4812 * Indicate to the mid and upper layers that an ATA command has 4813 * completed, with either an ok or not-ok status. 4814 * 4815 * Refrain from calling this function multiple times when 4816 * successfully completing multiple NCQ commands. 4817 * ata_qc_complete_multiple() should be used instead, which will 4818 * properly update IRQ expect state. 4819 * 4820 * LOCKING: 4821 * spin_lock_irqsave(host lock) 4822 */ 4823 void ata_qc_complete(struct ata_queued_cmd *qc) 4824 { 4825 struct ata_port *ap = qc->ap; 4826 struct ata_device *dev = qc->dev; 4827 struct ata_eh_info *ehi = &dev->link->eh_info; 4828 4829 /* Trigger the LED (if available) */ 4830 ledtrig_disk_activity(!!(qc->tf.flags & ATA_TFLAG_WRITE)); 4831 4832 /* 4833 * In order to synchronize EH with the regular execution path, a qc that 4834 * is owned by EH is marked with ATA_QCFLAG_EH. 4835 * 4836 * The normal execution path is responsible for not accessing a qc owned 4837 * by EH. libata core enforces the rule by returning NULL from 4838 * ata_qc_from_tag() for qcs owned by EH. 4839 */ 4840 if (unlikely(qc->err_mask)) 4841 qc->flags |= ATA_QCFLAG_EH; 4842 4843 /* 4844 * Finish internal commands without any further processing and always 4845 * with the result TF filled. 4846 */ 4847 if (unlikely(ata_tag_internal(qc->tag))) { 4848 fill_result_tf(qc); 4849 trace_ata_qc_complete_internal(qc); 4850 __ata_qc_complete(qc); 4851 return; 4852 } 4853 4854 /* Non-internal qc has failed. Fill the result TF and summon EH. */ 4855 if (unlikely(qc->flags & ATA_QCFLAG_EH)) { 4856 fill_result_tf(qc); 4857 trace_ata_qc_complete_failed(qc); 4858 ata_qc_schedule_eh(qc); 4859 return; 4860 } 4861 4862 WARN_ON_ONCE(ata_port_is_frozen(ap)); 4863 4864 /* read result TF if requested */ 4865 if (qc->flags & ATA_QCFLAG_RESULT_TF) 4866 fill_result_tf(qc); 4867 4868 trace_ata_qc_complete_done(qc); 4869 4870 /* 4871 * For CDL commands that completed without an error, check if we have 4872 * sense data (ATA_SENSE is set). If we do, then the command may have 4873 * been aborted by the device due to a limit timeout using the policy 4874 * 0xD. For these commands, invoke EH to get the command sense data. 4875 */ 4876 if (qc->flags & ATA_QCFLAG_HAS_CDL && 4877 qc->result_tf.status & ATA_SENSE) { 4878 /* 4879 * Tell SCSI EH to not overwrite scmd->result even if this 4880 * command is finished with result SAM_STAT_GOOD. 4881 */ 4882 qc->scsicmd->flags |= SCMD_FORCE_EH_SUCCESS; 4883 qc->flags |= ATA_QCFLAG_EH_SUCCESS_CMD; 4884 ehi->dev_action[dev->devno] |= ATA_EH_GET_SUCCESS_SENSE; 4885 4886 /* 4887 * set pending so that ata_qc_schedule_eh() does not trigger 4888 * fast drain, and freeze the port. 4889 */ 4890 ap->pflags |= ATA_PFLAG_EH_PENDING; 4891 ata_qc_schedule_eh(qc); 4892 return; 4893 } 4894 4895 /* Some commands need post-processing after successful completion. */ 4896 switch (qc->tf.command) { 4897 case ATA_CMD_SET_FEATURES: 4898 if (qc->tf.feature != SETFEATURES_WC_ON && 4899 qc->tf.feature != SETFEATURES_WC_OFF && 4900 qc->tf.feature != SETFEATURES_RA_ON && 4901 qc->tf.feature != SETFEATURES_RA_OFF) 4902 break; 4903 fallthrough; 4904 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */ 4905 case ATA_CMD_SET_MULTI: /* multi_count changed */ 4906 /* revalidate device */ 4907 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE; 4908 ata_port_schedule_eh(ap); 4909 break; 4910 4911 case ATA_CMD_SLEEP: 4912 dev->flags |= ATA_DFLAG_SLEEPING; 4913 break; 4914 } 4915 4916 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) 4917 ata_verify_xfer(qc); 4918 4919 __ata_qc_complete(qc); 4920 } 4921 EXPORT_SYMBOL_GPL(ata_qc_complete); 4922 4923 /** 4924 * ata_qc_get_active - get bitmask of active qcs 4925 * @ap: port in question 4926 * 4927 * LOCKING: 4928 * spin_lock_irqsave(host lock) 4929 * 4930 * RETURNS: 4931 * Bitmask of active qcs 4932 */ 4933 u64 ata_qc_get_active(struct ata_port *ap) 4934 { 4935 u64 qc_active = ap->qc_active; 4936 4937 /* ATA_TAG_INTERNAL is sent to hw as tag 0 */ 4938 if (qc_active & (1ULL << ATA_TAG_INTERNAL)) { 4939 qc_active |= (1 << 0); 4940 qc_active &= ~(1ULL << ATA_TAG_INTERNAL); 4941 } 4942 4943 return qc_active; 4944 } 4945 EXPORT_SYMBOL_GPL(ata_qc_get_active); 4946 4947 /** 4948 * ata_qc_issue - issue taskfile to device 4949 * @qc: command to issue to device 4950 * 4951 * Prepare an ATA command to submission to device. 4952 * This includes mapping the data into a DMA-able 4953 * area, filling in the S/G table, and finally 4954 * writing the taskfile to hardware, starting the command. 4955 * 4956 * LOCKING: 4957 * spin_lock_irqsave(host lock) 4958 */ 4959 void ata_qc_issue(struct ata_queued_cmd *qc) 4960 { 4961 struct ata_port *ap = qc->ap; 4962 struct ata_link *link = qc->dev->link; 4963 u8 prot = qc->tf.protocol; 4964 4965 /* Make sure only one non-NCQ command is outstanding. */ 4966 WARN_ON_ONCE(ata_tag_valid(link->active_tag)); 4967 4968 if (ata_is_ncq(prot)) { 4969 WARN_ON_ONCE(link->sactive & (1 << qc->hw_tag)); 4970 4971 if (!link->sactive) 4972 ap->nr_active_links++; 4973 link->sactive |= 1 << qc->hw_tag; 4974 } else { 4975 WARN_ON_ONCE(link->sactive); 4976 4977 ap->nr_active_links++; 4978 link->active_tag = qc->tag; 4979 } 4980 4981 qc->flags |= ATA_QCFLAG_ACTIVE; 4982 ap->qc_active |= 1ULL << qc->tag; 4983 4984 /* 4985 * We guarantee to LLDs that they will have at least one 4986 * non-zero sg if the command is a data command. 4987 */ 4988 if (ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes)) 4989 goto sys_err; 4990 4991 if (ata_is_dma(prot) || (ata_is_pio(prot) && 4992 (ap->flags & ATA_FLAG_PIO_DMA))) 4993 if (ata_sg_setup(qc)) 4994 goto sys_err; 4995 4996 /* if device is sleeping, schedule reset and abort the link */ 4997 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) { 4998 link->eh_info.action |= ATA_EH_RESET; 4999 ata_ehi_push_desc(&link->eh_info, "waking up from sleep"); 5000 ata_link_abort(link); 5001 return; 5002 } 5003 5004 trace_ata_qc_prep(qc); 5005 qc->err_mask |= ap->ops->qc_prep(qc); 5006 if (unlikely(qc->err_mask)) 5007 goto err; 5008 trace_ata_qc_issue(qc); 5009 qc->err_mask |= ap->ops->qc_issue(qc); 5010 if (unlikely(qc->err_mask)) 5011 goto err; 5012 return; 5013 5014 sys_err: 5015 qc->err_mask |= AC_ERR_SYSTEM; 5016 err: 5017 ata_qc_complete(qc); 5018 } 5019 5020 /** 5021 * ata_phys_link_online - test whether the given link is online 5022 * @link: ATA link to test 5023 * 5024 * Test whether @link is online. Note that this function returns 5025 * 0 if online status of @link cannot be obtained, so 5026 * ata_link_online(link) != !ata_link_offline(link). 5027 * 5028 * LOCKING: 5029 * None. 5030 * 5031 * RETURNS: 5032 * True if the port online status is available and online. 5033 */ 5034 bool ata_phys_link_online(struct ata_link *link) 5035 { 5036 u32 sstatus; 5037 5038 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && 5039 ata_sstatus_online(sstatus)) 5040 return true; 5041 return false; 5042 } 5043 5044 /** 5045 * ata_phys_link_offline - test whether the given link is offline 5046 * @link: ATA link to test 5047 * 5048 * Test whether @link is offline. Note that this function 5049 * returns 0 if offline status of @link cannot be obtained, so 5050 * ata_link_online(link) != !ata_link_offline(link). 5051 * 5052 * LOCKING: 5053 * None. 5054 * 5055 * RETURNS: 5056 * True if the port offline status is available and offline. 5057 */ 5058 bool ata_phys_link_offline(struct ata_link *link) 5059 { 5060 u32 sstatus; 5061 5062 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && 5063 !ata_sstatus_online(sstatus)) 5064 return true; 5065 return false; 5066 } 5067 5068 /** 5069 * ata_link_online - test whether the given link is online 5070 * @link: ATA link to test 5071 * 5072 * Test whether @link is online. This is identical to 5073 * ata_phys_link_online() when there's no slave link. When 5074 * there's a slave link, this function should only be called on 5075 * the master link and will return true if any of M/S links is 5076 * online. 5077 * 5078 * LOCKING: 5079 * None. 5080 * 5081 * RETURNS: 5082 * True if the port online status is available and online. 5083 */ 5084 bool ata_link_online(struct ata_link *link) 5085 { 5086 struct ata_link *slave = link->ap->slave_link; 5087 5088 WARN_ON(link == slave); /* shouldn't be called on slave link */ 5089 5090 return ata_phys_link_online(link) || 5091 (slave && ata_phys_link_online(slave)); 5092 } 5093 EXPORT_SYMBOL_GPL(ata_link_online); 5094 5095 /** 5096 * ata_link_offline - test whether the given link is offline 5097 * @link: ATA link to test 5098 * 5099 * Test whether @link is offline. This is identical to 5100 * ata_phys_link_offline() when there's no slave link. When 5101 * there's a slave link, this function should only be called on 5102 * the master link and will return true if both M/S links are 5103 * offline. 5104 * 5105 * LOCKING: 5106 * None. 5107 * 5108 * RETURNS: 5109 * True if the port offline status is available and offline. 5110 */ 5111 bool ata_link_offline(struct ata_link *link) 5112 { 5113 struct ata_link *slave = link->ap->slave_link; 5114 5115 WARN_ON(link == slave); /* shouldn't be called on slave link */ 5116 5117 return ata_phys_link_offline(link) && 5118 (!slave || ata_phys_link_offline(slave)); 5119 } 5120 EXPORT_SYMBOL_GPL(ata_link_offline); 5121 5122 #ifdef CONFIG_PM 5123 static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg, 5124 unsigned int action, unsigned int ehi_flags, 5125 bool async) 5126 { 5127 struct ata_link *link; 5128 unsigned long flags; 5129 5130 spin_lock_irqsave(ap->lock, flags); 5131 5132 /* 5133 * A previous PM operation might still be in progress. Wait for 5134 * ATA_PFLAG_PM_PENDING to clear. 5135 */ 5136 if (ap->pflags & ATA_PFLAG_PM_PENDING) { 5137 spin_unlock_irqrestore(ap->lock, flags); 5138 ata_port_wait_eh(ap); 5139 spin_lock_irqsave(ap->lock, flags); 5140 } 5141 5142 /* Request PM operation to EH */ 5143 ap->pm_mesg = mesg; 5144 ap->pflags |= ATA_PFLAG_PM_PENDING; 5145 ata_for_each_link(link, ap, HOST_FIRST) { 5146 link->eh_info.action |= action; 5147 link->eh_info.flags |= ehi_flags; 5148 } 5149 5150 ata_port_schedule_eh(ap); 5151 5152 spin_unlock_irqrestore(ap->lock, flags); 5153 5154 if (!async) 5155 ata_port_wait_eh(ap); 5156 } 5157 5158 /* 5159 * On some hardware, device fails to respond after spun down for suspend. As 5160 * the device won't be used before being resumed, we don't need to touch the 5161 * device. Ask EH to skip the usual stuff and proceed directly to suspend. 5162 * 5163 * http://thread.gmane.org/gmane.linux.ide/46764 5164 */ 5165 static const unsigned int ata_port_suspend_ehi = ATA_EHI_QUIET 5166 | ATA_EHI_NO_AUTOPSY 5167 | ATA_EHI_NO_RECOVERY; 5168 5169 static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg) 5170 { 5171 /* 5172 * We are about to suspend the port, so we do not care about 5173 * scsi_rescan_device() calls scheduled by previous resume operations. 5174 * The next resume will schedule the rescan again. So cancel any rescan 5175 * that is not done yet. 5176 */ 5177 cancel_delayed_work_sync(&ap->scsi_rescan_task); 5178 5179 ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, false); 5180 } 5181 5182 static void ata_port_suspend_async(struct ata_port *ap, pm_message_t mesg) 5183 { 5184 /* 5185 * We are about to suspend the port, so we do not care about 5186 * scsi_rescan_device() calls scheduled by previous resume operations. 5187 * The next resume will schedule the rescan again. So cancel any rescan 5188 * that is not done yet. 5189 */ 5190 cancel_delayed_work_sync(&ap->scsi_rescan_task); 5191 5192 ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, true); 5193 } 5194 5195 static int ata_port_pm_suspend(struct device *dev) 5196 { 5197 struct ata_port *ap = to_ata_port(dev); 5198 5199 if (pm_runtime_suspended(dev)) 5200 return 0; 5201 5202 ata_port_suspend(ap, PMSG_SUSPEND); 5203 return 0; 5204 } 5205 5206 static int ata_port_pm_freeze(struct device *dev) 5207 { 5208 struct ata_port *ap = to_ata_port(dev); 5209 5210 if (pm_runtime_suspended(dev)) 5211 return 0; 5212 5213 ata_port_suspend(ap, PMSG_FREEZE); 5214 return 0; 5215 } 5216 5217 static int ata_port_pm_poweroff(struct device *dev) 5218 { 5219 ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE); 5220 return 0; 5221 } 5222 5223 static const unsigned int ata_port_resume_ehi = ATA_EHI_NO_AUTOPSY 5224 | ATA_EHI_QUIET; 5225 5226 static void ata_port_resume(struct ata_port *ap, pm_message_t mesg) 5227 { 5228 ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, false); 5229 } 5230 5231 static void ata_port_resume_async(struct ata_port *ap, pm_message_t mesg) 5232 { 5233 ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, true); 5234 } 5235 5236 static int ata_port_pm_resume(struct device *dev) 5237 { 5238 ata_port_resume_async(to_ata_port(dev), PMSG_RESUME); 5239 pm_runtime_disable(dev); 5240 pm_runtime_set_active(dev); 5241 pm_runtime_enable(dev); 5242 return 0; 5243 } 5244 5245 /* 5246 * For ODDs, the upper layer will poll for media change every few seconds, 5247 * which will make it enter and leave suspend state every few seconds. And 5248 * as each suspend will cause a hard/soft reset, the gain of runtime suspend 5249 * is very little and the ODD may malfunction after constantly being reset. 5250 * So the idle callback here will not proceed to suspend if a non-ZPODD capable 5251 * ODD is attached to the port. 5252 */ 5253 static int ata_port_runtime_idle(struct device *dev) 5254 { 5255 struct ata_port *ap = to_ata_port(dev); 5256 struct ata_link *link; 5257 struct ata_device *adev; 5258 5259 ata_for_each_link(link, ap, HOST_FIRST) { 5260 ata_for_each_dev(adev, link, ENABLED) 5261 if (adev->class == ATA_DEV_ATAPI && 5262 !zpodd_dev_enabled(adev)) 5263 return -EBUSY; 5264 } 5265 5266 return 0; 5267 } 5268 5269 static int ata_port_runtime_suspend(struct device *dev) 5270 { 5271 ata_port_suspend(to_ata_port(dev), PMSG_AUTO_SUSPEND); 5272 return 0; 5273 } 5274 5275 static int ata_port_runtime_resume(struct device *dev) 5276 { 5277 ata_port_resume(to_ata_port(dev), PMSG_AUTO_RESUME); 5278 return 0; 5279 } 5280 5281 static const struct dev_pm_ops ata_port_pm_ops = { 5282 .suspend = ata_port_pm_suspend, 5283 .resume = ata_port_pm_resume, 5284 .freeze = ata_port_pm_freeze, 5285 .thaw = ata_port_pm_resume, 5286 .poweroff = ata_port_pm_poweroff, 5287 .restore = ata_port_pm_resume, 5288 5289 .runtime_suspend = ata_port_runtime_suspend, 5290 .runtime_resume = ata_port_runtime_resume, 5291 .runtime_idle = ata_port_runtime_idle, 5292 }; 5293 5294 /* sas ports don't participate in pm runtime management of ata_ports, 5295 * and need to resume ata devices at the domain level, not the per-port 5296 * level. sas suspend/resume is async to allow parallel port recovery 5297 * since sas has multiple ata_port instances per Scsi_Host. 5298 */ 5299 void ata_sas_port_suspend(struct ata_port *ap) 5300 { 5301 ata_port_suspend_async(ap, PMSG_SUSPEND); 5302 } 5303 EXPORT_SYMBOL_GPL(ata_sas_port_suspend); 5304 5305 void ata_sas_port_resume(struct ata_port *ap) 5306 { 5307 ata_port_resume_async(ap, PMSG_RESUME); 5308 } 5309 EXPORT_SYMBOL_GPL(ata_sas_port_resume); 5310 5311 /** 5312 * ata_host_suspend - suspend host 5313 * @host: host to suspend 5314 * @mesg: PM message 5315 * 5316 * Suspend @host. Actual operation is performed by port suspend. 5317 */ 5318 void ata_host_suspend(struct ata_host *host, pm_message_t mesg) 5319 { 5320 host->dev->power.power_state = mesg; 5321 } 5322 EXPORT_SYMBOL_GPL(ata_host_suspend); 5323 5324 /** 5325 * ata_host_resume - resume host 5326 * @host: host to resume 5327 * 5328 * Resume @host. Actual operation is performed by port resume. 5329 */ 5330 void ata_host_resume(struct ata_host *host) 5331 { 5332 host->dev->power.power_state = PMSG_ON; 5333 } 5334 EXPORT_SYMBOL_GPL(ata_host_resume); 5335 #endif 5336 5337 const struct device_type ata_port_type = { 5338 .name = ATA_PORT_TYPE_NAME, 5339 #ifdef CONFIG_PM 5340 .pm = &ata_port_pm_ops, 5341 #endif 5342 }; 5343 5344 /** 5345 * ata_dev_init - Initialize an ata_device structure 5346 * @dev: Device structure to initialize 5347 * 5348 * Initialize @dev in preparation for probing. 5349 * 5350 * LOCKING: 5351 * Inherited from caller. 5352 */ 5353 void ata_dev_init(struct ata_device *dev) 5354 { 5355 struct ata_link *link = ata_dev_phys_link(dev); 5356 struct ata_port *ap = link->ap; 5357 unsigned long flags; 5358 5359 /* SATA spd limit is bound to the attached device, reset together */ 5360 link->sata_spd_limit = link->hw_sata_spd_limit; 5361 link->sata_spd = 0; 5362 5363 /* High bits of dev->flags are used to record warm plug 5364 * requests which occur asynchronously. Synchronize using 5365 * host lock. 5366 */ 5367 spin_lock_irqsave(ap->lock, flags); 5368 dev->flags &= ~ATA_DFLAG_INIT_MASK; 5369 dev->horkage = 0; 5370 spin_unlock_irqrestore(ap->lock, flags); 5371 5372 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0, 5373 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN); 5374 dev->pio_mask = UINT_MAX; 5375 dev->mwdma_mask = UINT_MAX; 5376 dev->udma_mask = UINT_MAX; 5377 } 5378 5379 /** 5380 * ata_link_init - Initialize an ata_link structure 5381 * @ap: ATA port link is attached to 5382 * @link: Link structure to initialize 5383 * @pmp: Port multiplier port number 5384 * 5385 * Initialize @link. 5386 * 5387 * LOCKING: 5388 * Kernel thread context (may sleep) 5389 */ 5390 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) 5391 { 5392 int i; 5393 5394 /* clear everything except for devices */ 5395 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0, 5396 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN); 5397 5398 link->ap = ap; 5399 link->pmp = pmp; 5400 link->active_tag = ATA_TAG_POISON; 5401 link->hw_sata_spd_limit = UINT_MAX; 5402 5403 /* can't use iterator, ap isn't initialized yet */ 5404 for (i = 0; i < ATA_MAX_DEVICES; i++) { 5405 struct ata_device *dev = &link->device[i]; 5406 5407 dev->link = link; 5408 dev->devno = dev - link->device; 5409 #ifdef CONFIG_ATA_ACPI 5410 dev->gtf_filter = ata_acpi_gtf_filter; 5411 #endif 5412 ata_dev_init(dev); 5413 } 5414 } 5415 5416 /** 5417 * sata_link_init_spd - Initialize link->sata_spd_limit 5418 * @link: Link to configure sata_spd_limit for 5419 * 5420 * Initialize ``link->[hw_]sata_spd_limit`` to the currently 5421 * configured value. 5422 * 5423 * LOCKING: 5424 * Kernel thread context (may sleep). 5425 * 5426 * RETURNS: 5427 * 0 on success, -errno on failure. 5428 */ 5429 int sata_link_init_spd(struct ata_link *link) 5430 { 5431 u8 spd; 5432 int rc; 5433 5434 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol); 5435 if (rc) 5436 return rc; 5437 5438 spd = (link->saved_scontrol >> 4) & 0xf; 5439 if (spd) 5440 link->hw_sata_spd_limit &= (1 << spd) - 1; 5441 5442 ata_force_link_limits(link); 5443 5444 link->sata_spd_limit = link->hw_sata_spd_limit; 5445 5446 return 0; 5447 } 5448 5449 /** 5450 * ata_port_alloc - allocate and initialize basic ATA port resources 5451 * @host: ATA host this allocated port belongs to 5452 * 5453 * Allocate and initialize basic ATA port resources. 5454 * 5455 * RETURNS: 5456 * Allocate ATA port on success, NULL on failure. 5457 * 5458 * LOCKING: 5459 * Inherited from calling layer (may sleep). 5460 */ 5461 struct ata_port *ata_port_alloc(struct ata_host *host) 5462 { 5463 struct ata_port *ap; 5464 5465 ap = kzalloc(sizeof(*ap), GFP_KERNEL); 5466 if (!ap) 5467 return NULL; 5468 5469 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN; 5470 ap->lock = &host->lock; 5471 ap->print_id = -1; 5472 ap->local_port_no = -1; 5473 ap->host = host; 5474 ap->dev = host->dev; 5475 5476 mutex_init(&ap->scsi_scan_mutex); 5477 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); 5478 INIT_DELAYED_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); 5479 INIT_LIST_HEAD(&ap->eh_done_q); 5480 init_waitqueue_head(&ap->eh_wait_q); 5481 init_completion(&ap->park_req_pending); 5482 timer_setup(&ap->fastdrain_timer, ata_eh_fastdrain_timerfn, 5483 TIMER_DEFERRABLE); 5484 5485 ap->cbl = ATA_CBL_NONE; 5486 5487 ata_link_init(ap, &ap->link, 0); 5488 5489 #ifdef ATA_IRQ_TRAP 5490 ap->stats.unhandled_irq = 1; 5491 ap->stats.idle_irq = 1; 5492 #endif 5493 ata_sff_port_init(ap); 5494 5495 return ap; 5496 } 5497 5498 static void ata_devres_release(struct device *gendev, void *res) 5499 { 5500 struct ata_host *host = dev_get_drvdata(gendev); 5501 int i; 5502 5503 for (i = 0; i < host->n_ports; i++) { 5504 struct ata_port *ap = host->ports[i]; 5505 5506 if (!ap) 5507 continue; 5508 5509 if (ap->scsi_host) 5510 scsi_host_put(ap->scsi_host); 5511 5512 } 5513 5514 dev_set_drvdata(gendev, NULL); 5515 ata_host_put(host); 5516 } 5517 5518 static void ata_host_release(struct kref *kref) 5519 { 5520 struct ata_host *host = container_of(kref, struct ata_host, kref); 5521 int i; 5522 5523 for (i = 0; i < host->n_ports; i++) { 5524 struct ata_port *ap = host->ports[i]; 5525 5526 kfree(ap->pmp_link); 5527 kfree(ap->slave_link); 5528 kfree(ap->ncq_sense_buf); 5529 kfree(ap); 5530 host->ports[i] = NULL; 5531 } 5532 kfree(host); 5533 } 5534 5535 void ata_host_get(struct ata_host *host) 5536 { 5537 kref_get(&host->kref); 5538 } 5539 5540 void ata_host_put(struct ata_host *host) 5541 { 5542 kref_put(&host->kref, ata_host_release); 5543 } 5544 EXPORT_SYMBOL_GPL(ata_host_put); 5545 5546 /** 5547 * ata_host_alloc - allocate and init basic ATA host resources 5548 * @dev: generic device this host is associated with 5549 * @max_ports: maximum number of ATA ports associated with this host 5550 * 5551 * Allocate and initialize basic ATA host resources. LLD calls 5552 * this function to allocate a host, initializes it fully and 5553 * attaches it using ata_host_register(). 5554 * 5555 * @max_ports ports are allocated and host->n_ports is 5556 * initialized to @max_ports. The caller is allowed to decrease 5557 * host->n_ports before calling ata_host_register(). The unused 5558 * ports will be automatically freed on registration. 5559 * 5560 * RETURNS: 5561 * Allocate ATA host on success, NULL on failure. 5562 * 5563 * LOCKING: 5564 * Inherited from calling layer (may sleep). 5565 */ 5566 struct ata_host *ata_host_alloc(struct device *dev, int max_ports) 5567 { 5568 struct ata_host *host; 5569 size_t sz; 5570 int i; 5571 void *dr; 5572 5573 /* alloc a container for our list of ATA ports (buses) */ 5574 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); 5575 host = kzalloc(sz, GFP_KERNEL); 5576 if (!host) 5577 return NULL; 5578 5579 if (!devres_open_group(dev, NULL, GFP_KERNEL)) 5580 goto err_free; 5581 5582 dr = devres_alloc(ata_devres_release, 0, GFP_KERNEL); 5583 if (!dr) 5584 goto err_out; 5585 5586 devres_add(dev, dr); 5587 dev_set_drvdata(dev, host); 5588 5589 spin_lock_init(&host->lock); 5590 mutex_init(&host->eh_mutex); 5591 host->dev = dev; 5592 host->n_ports = max_ports; 5593 kref_init(&host->kref); 5594 5595 /* allocate ports bound to this host */ 5596 for (i = 0; i < max_ports; i++) { 5597 struct ata_port *ap; 5598 5599 ap = ata_port_alloc(host); 5600 if (!ap) 5601 goto err_out; 5602 5603 ap->port_no = i; 5604 host->ports[i] = ap; 5605 } 5606 5607 devres_remove_group(dev, NULL); 5608 return host; 5609 5610 err_out: 5611 devres_release_group(dev, NULL); 5612 err_free: 5613 kfree(host); 5614 return NULL; 5615 } 5616 EXPORT_SYMBOL_GPL(ata_host_alloc); 5617 5618 /** 5619 * ata_host_alloc_pinfo - alloc host and init with port_info array 5620 * @dev: generic device this host is associated with 5621 * @ppi: array of ATA port_info to initialize host with 5622 * @n_ports: number of ATA ports attached to this host 5623 * 5624 * Allocate ATA host and initialize with info from @ppi. If NULL 5625 * terminated, @ppi may contain fewer entries than @n_ports. The 5626 * last entry will be used for the remaining ports. 5627 * 5628 * RETURNS: 5629 * Allocate ATA host on success, NULL on failure. 5630 * 5631 * LOCKING: 5632 * Inherited from calling layer (may sleep). 5633 */ 5634 struct ata_host *ata_host_alloc_pinfo(struct device *dev, 5635 const struct ata_port_info * const * ppi, 5636 int n_ports) 5637 { 5638 const struct ata_port_info *pi = &ata_dummy_port_info; 5639 struct ata_host *host; 5640 int i, j; 5641 5642 host = ata_host_alloc(dev, n_ports); 5643 if (!host) 5644 return NULL; 5645 5646 for (i = 0, j = 0; i < host->n_ports; i++) { 5647 struct ata_port *ap = host->ports[i]; 5648 5649 if (ppi[j]) 5650 pi = ppi[j++]; 5651 5652 ap->pio_mask = pi->pio_mask; 5653 ap->mwdma_mask = pi->mwdma_mask; 5654 ap->udma_mask = pi->udma_mask; 5655 ap->flags |= pi->flags; 5656 ap->link.flags |= pi->link_flags; 5657 ap->ops = pi->port_ops; 5658 5659 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) 5660 host->ops = pi->port_ops; 5661 } 5662 5663 return host; 5664 } 5665 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); 5666 5667 static void ata_host_stop(struct device *gendev, void *res) 5668 { 5669 struct ata_host *host = dev_get_drvdata(gendev); 5670 int i; 5671 5672 WARN_ON(!(host->flags & ATA_HOST_STARTED)); 5673 5674 for (i = 0; i < host->n_ports; i++) { 5675 struct ata_port *ap = host->ports[i]; 5676 5677 if (ap->ops->port_stop) 5678 ap->ops->port_stop(ap); 5679 } 5680 5681 if (host->ops->host_stop) 5682 host->ops->host_stop(host); 5683 } 5684 5685 /** 5686 * ata_finalize_port_ops - finalize ata_port_operations 5687 * @ops: ata_port_operations to finalize 5688 * 5689 * An ata_port_operations can inherit from another ops and that 5690 * ops can again inherit from another. This can go on as many 5691 * times as necessary as long as there is no loop in the 5692 * inheritance chain. 5693 * 5694 * Ops tables are finalized when the host is started. NULL or 5695 * unspecified entries are inherited from the closet ancestor 5696 * which has the method and the entry is populated with it. 5697 * After finalization, the ops table directly points to all the 5698 * methods and ->inherits is no longer necessary and cleared. 5699 * 5700 * Using ATA_OP_NULL, inheriting ops can force a method to NULL. 5701 * 5702 * LOCKING: 5703 * None. 5704 */ 5705 static void ata_finalize_port_ops(struct ata_port_operations *ops) 5706 { 5707 static DEFINE_SPINLOCK(lock); 5708 const struct ata_port_operations *cur; 5709 void **begin = (void **)ops; 5710 void **end = (void **)&ops->inherits; 5711 void **pp; 5712 5713 if (!ops || !ops->inherits) 5714 return; 5715 5716 spin_lock(&lock); 5717 5718 for (cur = ops->inherits; cur; cur = cur->inherits) { 5719 void **inherit = (void **)cur; 5720 5721 for (pp = begin; pp < end; pp++, inherit++) 5722 if (!*pp) 5723 *pp = *inherit; 5724 } 5725 5726 for (pp = begin; pp < end; pp++) 5727 if (IS_ERR(*pp)) 5728 *pp = NULL; 5729 5730 ops->inherits = NULL; 5731 5732 spin_unlock(&lock); 5733 } 5734 5735 /** 5736 * ata_host_start - start and freeze ports of an ATA host 5737 * @host: ATA host to start ports for 5738 * 5739 * Start and then freeze ports of @host. Started status is 5740 * recorded in host->flags, so this function can be called 5741 * multiple times. Ports are guaranteed to get started only 5742 * once. If host->ops is not initialized yet, it is set to the 5743 * first non-dummy port ops. 5744 * 5745 * LOCKING: 5746 * Inherited from calling layer (may sleep). 5747 * 5748 * RETURNS: 5749 * 0 if all ports are started successfully, -errno otherwise. 5750 */ 5751 int ata_host_start(struct ata_host *host) 5752 { 5753 int have_stop = 0; 5754 void *start_dr = NULL; 5755 int i, rc; 5756 5757 if (host->flags & ATA_HOST_STARTED) 5758 return 0; 5759 5760 ata_finalize_port_ops(host->ops); 5761 5762 for (i = 0; i < host->n_ports; i++) { 5763 struct ata_port *ap = host->ports[i]; 5764 5765 ata_finalize_port_ops(ap->ops); 5766 5767 if (!host->ops && !ata_port_is_dummy(ap)) 5768 host->ops = ap->ops; 5769 5770 if (ap->ops->port_stop) 5771 have_stop = 1; 5772 } 5773 5774 if (host->ops && host->ops->host_stop) 5775 have_stop = 1; 5776 5777 if (have_stop) { 5778 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL); 5779 if (!start_dr) 5780 return -ENOMEM; 5781 } 5782 5783 for (i = 0; i < host->n_ports; i++) { 5784 struct ata_port *ap = host->ports[i]; 5785 5786 if (ap->ops->port_start) { 5787 rc = ap->ops->port_start(ap); 5788 if (rc) { 5789 if (rc != -ENODEV) 5790 dev_err(host->dev, 5791 "failed to start port %d (errno=%d)\n", 5792 i, rc); 5793 goto err_out; 5794 } 5795 } 5796 ata_eh_freeze_port(ap); 5797 } 5798 5799 if (start_dr) 5800 devres_add(host->dev, start_dr); 5801 host->flags |= ATA_HOST_STARTED; 5802 return 0; 5803 5804 err_out: 5805 while (--i >= 0) { 5806 struct ata_port *ap = host->ports[i]; 5807 5808 if (ap->ops->port_stop) 5809 ap->ops->port_stop(ap); 5810 } 5811 devres_free(start_dr); 5812 return rc; 5813 } 5814 EXPORT_SYMBOL_GPL(ata_host_start); 5815 5816 /** 5817 * ata_host_init - Initialize a host struct for sas (ipr, libsas) 5818 * @host: host to initialize 5819 * @dev: device host is attached to 5820 * @ops: port_ops 5821 * 5822 */ 5823 void ata_host_init(struct ata_host *host, struct device *dev, 5824 struct ata_port_operations *ops) 5825 { 5826 spin_lock_init(&host->lock); 5827 mutex_init(&host->eh_mutex); 5828 host->n_tags = ATA_MAX_QUEUE; 5829 host->dev = dev; 5830 host->ops = ops; 5831 kref_init(&host->kref); 5832 } 5833 EXPORT_SYMBOL_GPL(ata_host_init); 5834 5835 void ata_port_probe(struct ata_port *ap) 5836 { 5837 struct ata_eh_info *ehi = &ap->link.eh_info; 5838 unsigned long flags; 5839 5840 /* kick EH for boot probing */ 5841 spin_lock_irqsave(ap->lock, flags); 5842 5843 ehi->probe_mask |= ATA_ALL_DEVICES; 5844 ehi->action |= ATA_EH_RESET; 5845 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; 5846 5847 ap->pflags &= ~ATA_PFLAG_INITIALIZING; 5848 ap->pflags |= ATA_PFLAG_LOADING; 5849 ata_port_schedule_eh(ap); 5850 5851 spin_unlock_irqrestore(ap->lock, flags); 5852 } 5853 EXPORT_SYMBOL_GPL(ata_port_probe); 5854 5855 static void async_port_probe(void *data, async_cookie_t cookie) 5856 { 5857 struct ata_port *ap = data; 5858 5859 /* 5860 * If we're not allowed to scan this host in parallel, 5861 * we need to wait until all previous scans have completed 5862 * before going further. 5863 * Jeff Garzik says this is only within a controller, so we 5864 * don't need to wait for port 0, only for later ports. 5865 */ 5866 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0) 5867 async_synchronize_cookie(cookie); 5868 5869 ata_port_probe(ap); 5870 ata_port_wait_eh(ap); 5871 5872 /* in order to keep device order, we need to synchronize at this point */ 5873 async_synchronize_cookie(cookie); 5874 5875 ata_scsi_scan_host(ap, 1); 5876 } 5877 5878 /** 5879 * ata_host_register - register initialized ATA host 5880 * @host: ATA host to register 5881 * @sht: template for SCSI host 5882 * 5883 * Register initialized ATA host. @host is allocated using 5884 * ata_host_alloc() and fully initialized by LLD. This function 5885 * starts ports, registers @host with ATA and SCSI layers and 5886 * probe registered devices. 5887 * 5888 * LOCKING: 5889 * Inherited from calling layer (may sleep). 5890 * 5891 * RETURNS: 5892 * 0 on success, -errno otherwise. 5893 */ 5894 int ata_host_register(struct ata_host *host, const struct scsi_host_template *sht) 5895 { 5896 int i, rc; 5897 5898 host->n_tags = clamp(sht->can_queue, 1, ATA_MAX_QUEUE); 5899 5900 /* host must have been started */ 5901 if (!(host->flags & ATA_HOST_STARTED)) { 5902 dev_err(host->dev, "BUG: trying to register unstarted host\n"); 5903 WARN_ON(1); 5904 return -EINVAL; 5905 } 5906 5907 /* Blow away unused ports. This happens when LLD can't 5908 * determine the exact number of ports to allocate at 5909 * allocation time. 5910 */ 5911 for (i = host->n_ports; host->ports[i]; i++) 5912 kfree(host->ports[i]); 5913 5914 /* give ports names and add SCSI hosts */ 5915 for (i = 0; i < host->n_ports; i++) { 5916 host->ports[i]->print_id = atomic_inc_return(&ata_print_id); 5917 host->ports[i]->local_port_no = i + 1; 5918 } 5919 5920 /* Create associated sysfs transport objects */ 5921 for (i = 0; i < host->n_ports; i++) { 5922 rc = ata_tport_add(host->dev,host->ports[i]); 5923 if (rc) { 5924 goto err_tadd; 5925 } 5926 } 5927 5928 rc = ata_scsi_add_hosts(host, sht); 5929 if (rc) 5930 goto err_tadd; 5931 5932 /* set cable, sata_spd_limit and report */ 5933 for (i = 0; i < host->n_ports; i++) { 5934 struct ata_port *ap = host->ports[i]; 5935 unsigned int xfer_mask; 5936 5937 /* set SATA cable type if still unset */ 5938 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) 5939 ap->cbl = ATA_CBL_SATA; 5940 5941 /* init sata_spd_limit to the current value */ 5942 sata_link_init_spd(&ap->link); 5943 if (ap->slave_link) 5944 sata_link_init_spd(ap->slave_link); 5945 5946 /* print per-port info to dmesg */ 5947 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, 5948 ap->udma_mask); 5949 5950 if (!ata_port_is_dummy(ap)) { 5951 ata_port_info(ap, "%cATA max %s %s\n", 5952 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', 5953 ata_mode_string(xfer_mask), 5954 ap->link.eh_info.desc); 5955 ata_ehi_clear_desc(&ap->link.eh_info); 5956 } else 5957 ata_port_info(ap, "DUMMY\n"); 5958 } 5959 5960 /* perform each probe asynchronously */ 5961 for (i = 0; i < host->n_ports; i++) { 5962 struct ata_port *ap = host->ports[i]; 5963 ap->cookie = async_schedule(async_port_probe, ap); 5964 } 5965 5966 return 0; 5967 5968 err_tadd: 5969 while (--i >= 0) { 5970 ata_tport_delete(host->ports[i]); 5971 } 5972 return rc; 5973 5974 } 5975 EXPORT_SYMBOL_GPL(ata_host_register); 5976 5977 /** 5978 * ata_host_activate - start host, request IRQ and register it 5979 * @host: target ATA host 5980 * @irq: IRQ to request 5981 * @irq_handler: irq_handler used when requesting IRQ 5982 * @irq_flags: irq_flags used when requesting IRQ 5983 * @sht: scsi_host_template to use when registering the host 5984 * 5985 * After allocating an ATA host and initializing it, most libata 5986 * LLDs perform three steps to activate the host - start host, 5987 * request IRQ and register it. This helper takes necessary 5988 * arguments and performs the three steps in one go. 5989 * 5990 * An invalid IRQ skips the IRQ registration and expects the host to 5991 * have set polling mode on the port. In this case, @irq_handler 5992 * should be NULL. 5993 * 5994 * LOCKING: 5995 * Inherited from calling layer (may sleep). 5996 * 5997 * RETURNS: 5998 * 0 on success, -errno otherwise. 5999 */ 6000 int ata_host_activate(struct ata_host *host, int irq, 6001 irq_handler_t irq_handler, unsigned long irq_flags, 6002 const struct scsi_host_template *sht) 6003 { 6004 int i, rc; 6005 char *irq_desc; 6006 6007 rc = ata_host_start(host); 6008 if (rc) 6009 return rc; 6010 6011 /* Special case for polling mode */ 6012 if (!irq) { 6013 WARN_ON(irq_handler); 6014 return ata_host_register(host, sht); 6015 } 6016 6017 irq_desc = devm_kasprintf(host->dev, GFP_KERNEL, "%s[%s]", 6018 dev_driver_string(host->dev), 6019 dev_name(host->dev)); 6020 if (!irq_desc) 6021 return -ENOMEM; 6022 6023 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, 6024 irq_desc, host); 6025 if (rc) 6026 return rc; 6027 6028 for (i = 0; i < host->n_ports; i++) 6029 ata_port_desc(host->ports[i], "irq %d", irq); 6030 6031 rc = ata_host_register(host, sht); 6032 /* if failed, just free the IRQ and leave ports alone */ 6033 if (rc) 6034 devm_free_irq(host->dev, irq, host); 6035 6036 return rc; 6037 } 6038 EXPORT_SYMBOL_GPL(ata_host_activate); 6039 6040 /** 6041 * ata_port_detach - Detach ATA port in preparation of device removal 6042 * @ap: ATA port to be detached 6043 * 6044 * Detach all ATA devices and the associated SCSI devices of @ap; 6045 * then, remove the associated SCSI host. @ap is guaranteed to 6046 * be quiescent on return from this function. 6047 * 6048 * LOCKING: 6049 * Kernel thread context (may sleep). 6050 */ 6051 static void ata_port_detach(struct ata_port *ap) 6052 { 6053 unsigned long flags; 6054 struct ata_link *link; 6055 struct ata_device *dev; 6056 6057 /* Wait for any ongoing EH */ 6058 ata_port_wait_eh(ap); 6059 6060 mutex_lock(&ap->scsi_scan_mutex); 6061 spin_lock_irqsave(ap->lock, flags); 6062 6063 /* Remove scsi devices */ 6064 ata_for_each_link(link, ap, HOST_FIRST) { 6065 ata_for_each_dev(dev, link, ALL) { 6066 if (dev->sdev) { 6067 spin_unlock_irqrestore(ap->lock, flags); 6068 scsi_remove_device(dev->sdev); 6069 spin_lock_irqsave(ap->lock, flags); 6070 dev->sdev = NULL; 6071 } 6072 } 6073 } 6074 6075 /* Tell EH to disable all devices */ 6076 ap->pflags |= ATA_PFLAG_UNLOADING; 6077 ata_port_schedule_eh(ap); 6078 6079 spin_unlock_irqrestore(ap->lock, flags); 6080 mutex_unlock(&ap->scsi_scan_mutex); 6081 6082 /* wait till EH commits suicide */ 6083 ata_port_wait_eh(ap); 6084 6085 /* it better be dead now */ 6086 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED)); 6087 6088 cancel_delayed_work_sync(&ap->hotplug_task); 6089 cancel_delayed_work_sync(&ap->scsi_rescan_task); 6090 6091 /* clean up zpodd on port removal */ 6092 ata_for_each_link(link, ap, HOST_FIRST) { 6093 ata_for_each_dev(dev, link, ALL) { 6094 if (zpodd_dev_enabled(dev)) 6095 zpodd_exit(dev); 6096 } 6097 } 6098 if (ap->pmp_link) { 6099 int i; 6100 for (i = 0; i < SATA_PMP_MAX_PORTS; i++) 6101 ata_tlink_delete(&ap->pmp_link[i]); 6102 } 6103 /* remove the associated SCSI host */ 6104 scsi_remove_host(ap->scsi_host); 6105 ata_tport_delete(ap); 6106 } 6107 6108 /** 6109 * ata_host_detach - Detach all ports of an ATA host 6110 * @host: Host to detach 6111 * 6112 * Detach all ports of @host. 6113 * 6114 * LOCKING: 6115 * Kernel thread context (may sleep). 6116 */ 6117 void ata_host_detach(struct ata_host *host) 6118 { 6119 int i; 6120 6121 for (i = 0; i < host->n_ports; i++) { 6122 /* Ensure ata_port probe has completed */ 6123 async_synchronize_cookie(host->ports[i]->cookie + 1); 6124 ata_port_detach(host->ports[i]); 6125 } 6126 6127 /* the host is dead now, dissociate ACPI */ 6128 ata_acpi_dissociate(host); 6129 } 6130 EXPORT_SYMBOL_GPL(ata_host_detach); 6131 6132 #ifdef CONFIG_PCI 6133 6134 /** 6135 * ata_pci_remove_one - PCI layer callback for device removal 6136 * @pdev: PCI device that was removed 6137 * 6138 * PCI layer indicates to libata via this hook that hot-unplug or 6139 * module unload event has occurred. Detach all ports. Resource 6140 * release is handled via devres. 6141 * 6142 * LOCKING: 6143 * Inherited from PCI layer (may sleep). 6144 */ 6145 void ata_pci_remove_one(struct pci_dev *pdev) 6146 { 6147 struct ata_host *host = pci_get_drvdata(pdev); 6148 6149 ata_host_detach(host); 6150 } 6151 EXPORT_SYMBOL_GPL(ata_pci_remove_one); 6152 6153 void ata_pci_shutdown_one(struct pci_dev *pdev) 6154 { 6155 struct ata_host *host = pci_get_drvdata(pdev); 6156 int i; 6157 6158 for (i = 0; i < host->n_ports; i++) { 6159 struct ata_port *ap = host->ports[i]; 6160 6161 ap->pflags |= ATA_PFLAG_FROZEN; 6162 6163 /* Disable port interrupts */ 6164 if (ap->ops->freeze) 6165 ap->ops->freeze(ap); 6166 6167 /* Stop the port DMA engines */ 6168 if (ap->ops->port_stop) 6169 ap->ops->port_stop(ap); 6170 } 6171 } 6172 EXPORT_SYMBOL_GPL(ata_pci_shutdown_one); 6173 6174 /* move to PCI subsystem */ 6175 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) 6176 { 6177 unsigned long tmp = 0; 6178 6179 switch (bits->width) { 6180 case 1: { 6181 u8 tmp8 = 0; 6182 pci_read_config_byte(pdev, bits->reg, &tmp8); 6183 tmp = tmp8; 6184 break; 6185 } 6186 case 2: { 6187 u16 tmp16 = 0; 6188 pci_read_config_word(pdev, bits->reg, &tmp16); 6189 tmp = tmp16; 6190 break; 6191 } 6192 case 4: { 6193 u32 tmp32 = 0; 6194 pci_read_config_dword(pdev, bits->reg, &tmp32); 6195 tmp = tmp32; 6196 break; 6197 } 6198 6199 default: 6200 return -EINVAL; 6201 } 6202 6203 tmp &= bits->mask; 6204 6205 return (tmp == bits->val) ? 1 : 0; 6206 } 6207 EXPORT_SYMBOL_GPL(pci_test_config_bits); 6208 6209 #ifdef CONFIG_PM 6210 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) 6211 { 6212 pci_save_state(pdev); 6213 pci_disable_device(pdev); 6214 6215 if (mesg.event & PM_EVENT_SLEEP) 6216 pci_set_power_state(pdev, PCI_D3hot); 6217 } 6218 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); 6219 6220 int ata_pci_device_do_resume(struct pci_dev *pdev) 6221 { 6222 int rc; 6223 6224 pci_set_power_state(pdev, PCI_D0); 6225 pci_restore_state(pdev); 6226 6227 rc = pcim_enable_device(pdev); 6228 if (rc) { 6229 dev_err(&pdev->dev, 6230 "failed to enable device after resume (%d)\n", rc); 6231 return rc; 6232 } 6233 6234 pci_set_master(pdev); 6235 return 0; 6236 } 6237 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); 6238 6239 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) 6240 { 6241 struct ata_host *host = pci_get_drvdata(pdev); 6242 6243 ata_host_suspend(host, mesg); 6244 6245 ata_pci_device_do_suspend(pdev, mesg); 6246 6247 return 0; 6248 } 6249 EXPORT_SYMBOL_GPL(ata_pci_device_suspend); 6250 6251 int ata_pci_device_resume(struct pci_dev *pdev) 6252 { 6253 struct ata_host *host = pci_get_drvdata(pdev); 6254 int rc; 6255 6256 rc = ata_pci_device_do_resume(pdev); 6257 if (rc == 0) 6258 ata_host_resume(host); 6259 return rc; 6260 } 6261 EXPORT_SYMBOL_GPL(ata_pci_device_resume); 6262 #endif /* CONFIG_PM */ 6263 #endif /* CONFIG_PCI */ 6264 6265 /** 6266 * ata_platform_remove_one - Platform layer callback for device removal 6267 * @pdev: Platform device that was removed 6268 * 6269 * Platform layer indicates to libata via this hook that hot-unplug or 6270 * module unload event has occurred. Detach all ports. Resource 6271 * release is handled via devres. 6272 * 6273 * LOCKING: 6274 * Inherited from platform layer (may sleep). 6275 */ 6276 void ata_platform_remove_one(struct platform_device *pdev) 6277 { 6278 struct ata_host *host = platform_get_drvdata(pdev); 6279 6280 ata_host_detach(host); 6281 } 6282 EXPORT_SYMBOL_GPL(ata_platform_remove_one); 6283 6284 #ifdef CONFIG_ATA_FORCE 6285 6286 #define force_cbl(name, flag) \ 6287 { #name, .cbl = (flag) } 6288 6289 #define force_spd_limit(spd, val) \ 6290 { #spd, .spd_limit = (val) } 6291 6292 #define force_xfer(mode, shift) \ 6293 { #mode, .xfer_mask = (1UL << (shift)) } 6294 6295 #define force_lflag_on(name, flags) \ 6296 { #name, .lflags_on = (flags) } 6297 6298 #define force_lflag_onoff(name, flags) \ 6299 { "no" #name, .lflags_on = (flags) }, \ 6300 { #name, .lflags_off = (flags) } 6301 6302 #define force_horkage_on(name, flag) \ 6303 { #name, .horkage_on = (flag) } 6304 6305 #define force_horkage_onoff(name, flag) \ 6306 { "no" #name, .horkage_on = (flag) }, \ 6307 { #name, .horkage_off = (flag) } 6308 6309 static const struct ata_force_param force_tbl[] __initconst = { 6310 force_cbl(40c, ATA_CBL_PATA40), 6311 force_cbl(80c, ATA_CBL_PATA80), 6312 force_cbl(short40c, ATA_CBL_PATA40_SHORT), 6313 force_cbl(unk, ATA_CBL_PATA_UNK), 6314 force_cbl(ign, ATA_CBL_PATA_IGN), 6315 force_cbl(sata, ATA_CBL_SATA), 6316 6317 force_spd_limit(1.5Gbps, 1), 6318 force_spd_limit(3.0Gbps, 2), 6319 6320 force_xfer(pio0, ATA_SHIFT_PIO + 0), 6321 force_xfer(pio1, ATA_SHIFT_PIO + 1), 6322 force_xfer(pio2, ATA_SHIFT_PIO + 2), 6323 force_xfer(pio3, ATA_SHIFT_PIO + 3), 6324 force_xfer(pio4, ATA_SHIFT_PIO + 4), 6325 force_xfer(pio5, ATA_SHIFT_PIO + 5), 6326 force_xfer(pio6, ATA_SHIFT_PIO + 6), 6327 force_xfer(mwdma0, ATA_SHIFT_MWDMA + 0), 6328 force_xfer(mwdma1, ATA_SHIFT_MWDMA + 1), 6329 force_xfer(mwdma2, ATA_SHIFT_MWDMA + 2), 6330 force_xfer(mwdma3, ATA_SHIFT_MWDMA + 3), 6331 force_xfer(mwdma4, ATA_SHIFT_MWDMA + 4), 6332 force_xfer(udma0, ATA_SHIFT_UDMA + 0), 6333 force_xfer(udma16, ATA_SHIFT_UDMA + 0), 6334 force_xfer(udma/16, ATA_SHIFT_UDMA + 0), 6335 force_xfer(udma1, ATA_SHIFT_UDMA + 1), 6336 force_xfer(udma25, ATA_SHIFT_UDMA + 1), 6337 force_xfer(udma/25, ATA_SHIFT_UDMA + 1), 6338 force_xfer(udma2, ATA_SHIFT_UDMA + 2), 6339 force_xfer(udma33, ATA_SHIFT_UDMA + 2), 6340 force_xfer(udma/33, ATA_SHIFT_UDMA + 2), 6341 force_xfer(udma3, ATA_SHIFT_UDMA + 3), 6342 force_xfer(udma44, ATA_SHIFT_UDMA + 3), 6343 force_xfer(udma/44, ATA_SHIFT_UDMA + 3), 6344 force_xfer(udma4, ATA_SHIFT_UDMA + 4), 6345 force_xfer(udma66, ATA_SHIFT_UDMA + 4), 6346 force_xfer(udma/66, ATA_SHIFT_UDMA + 4), 6347 force_xfer(udma5, ATA_SHIFT_UDMA + 5), 6348 force_xfer(udma100, ATA_SHIFT_UDMA + 5), 6349 force_xfer(udma/100, ATA_SHIFT_UDMA + 5), 6350 force_xfer(udma6, ATA_SHIFT_UDMA + 6), 6351 force_xfer(udma133, ATA_SHIFT_UDMA + 6), 6352 force_xfer(udma/133, ATA_SHIFT_UDMA + 6), 6353 force_xfer(udma7, ATA_SHIFT_UDMA + 7), 6354 6355 force_lflag_on(nohrst, ATA_LFLAG_NO_HRST), 6356 force_lflag_on(nosrst, ATA_LFLAG_NO_SRST), 6357 force_lflag_on(norst, ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST), 6358 force_lflag_on(rstonce, ATA_LFLAG_RST_ONCE), 6359 force_lflag_onoff(dbdelay, ATA_LFLAG_NO_DEBOUNCE_DELAY), 6360 6361 force_horkage_onoff(ncq, ATA_HORKAGE_NONCQ), 6362 force_horkage_onoff(ncqtrim, ATA_HORKAGE_NO_NCQ_TRIM), 6363 force_horkage_onoff(ncqati, ATA_HORKAGE_NO_NCQ_ON_ATI), 6364 6365 force_horkage_onoff(trim, ATA_HORKAGE_NOTRIM), 6366 force_horkage_on(trim_zero, ATA_HORKAGE_ZERO_AFTER_TRIM), 6367 force_horkage_on(max_trim_128m, ATA_HORKAGE_MAX_TRIM_128M), 6368 6369 force_horkage_onoff(dma, ATA_HORKAGE_NODMA), 6370 force_horkage_on(atapi_dmadir, ATA_HORKAGE_ATAPI_DMADIR), 6371 force_horkage_on(atapi_mod16_dma, ATA_HORKAGE_ATAPI_MOD16_DMA), 6372 6373 force_horkage_onoff(dmalog, ATA_HORKAGE_NO_DMA_LOG), 6374 force_horkage_onoff(iddevlog, ATA_HORKAGE_NO_ID_DEV_LOG), 6375 force_horkage_onoff(logdir, ATA_HORKAGE_NO_LOG_DIR), 6376 6377 force_horkage_on(max_sec_128, ATA_HORKAGE_MAX_SEC_128), 6378 force_horkage_on(max_sec_1024, ATA_HORKAGE_MAX_SEC_1024), 6379 force_horkage_on(max_sec_lba48, ATA_HORKAGE_MAX_SEC_LBA48), 6380 6381 force_horkage_onoff(lpm, ATA_HORKAGE_NOLPM), 6382 force_horkage_onoff(setxfer, ATA_HORKAGE_NOSETXFER), 6383 force_horkage_on(dump_id, ATA_HORKAGE_DUMP_ID), 6384 force_horkage_onoff(fua, ATA_HORKAGE_NO_FUA), 6385 6386 force_horkage_on(disable, ATA_HORKAGE_DISABLE), 6387 }; 6388 6389 static int __init ata_parse_force_one(char **cur, 6390 struct ata_force_ent *force_ent, 6391 const char **reason) 6392 { 6393 char *start = *cur, *p = *cur; 6394 char *id, *val, *endp; 6395 const struct ata_force_param *match_fp = NULL; 6396 int nr_matches = 0, i; 6397 6398 /* find where this param ends and update *cur */ 6399 while (*p != '\0' && *p != ',') 6400 p++; 6401 6402 if (*p == '\0') 6403 *cur = p; 6404 else 6405 *cur = p + 1; 6406 6407 *p = '\0'; 6408 6409 /* parse */ 6410 p = strchr(start, ':'); 6411 if (!p) { 6412 val = strstrip(start); 6413 goto parse_val; 6414 } 6415 *p = '\0'; 6416 6417 id = strstrip(start); 6418 val = strstrip(p + 1); 6419 6420 /* parse id */ 6421 p = strchr(id, '.'); 6422 if (p) { 6423 *p++ = '\0'; 6424 force_ent->device = simple_strtoul(p, &endp, 10); 6425 if (p == endp || *endp != '\0') { 6426 *reason = "invalid device"; 6427 return -EINVAL; 6428 } 6429 } 6430 6431 force_ent->port = simple_strtoul(id, &endp, 10); 6432 if (id == endp || *endp != '\0') { 6433 *reason = "invalid port/link"; 6434 return -EINVAL; 6435 } 6436 6437 parse_val: 6438 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */ 6439 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) { 6440 const struct ata_force_param *fp = &force_tbl[i]; 6441 6442 if (strncasecmp(val, fp->name, strlen(val))) 6443 continue; 6444 6445 nr_matches++; 6446 match_fp = fp; 6447 6448 if (strcasecmp(val, fp->name) == 0) { 6449 nr_matches = 1; 6450 break; 6451 } 6452 } 6453 6454 if (!nr_matches) { 6455 *reason = "unknown value"; 6456 return -EINVAL; 6457 } 6458 if (nr_matches > 1) { 6459 *reason = "ambiguous value"; 6460 return -EINVAL; 6461 } 6462 6463 force_ent->param = *match_fp; 6464 6465 return 0; 6466 } 6467 6468 static void __init ata_parse_force_param(void) 6469 { 6470 int idx = 0, size = 1; 6471 int last_port = -1, last_device = -1; 6472 char *p, *cur, *next; 6473 6474 /* Calculate maximum number of params and allocate ata_force_tbl */ 6475 for (p = ata_force_param_buf; *p; p++) 6476 if (*p == ',') 6477 size++; 6478 6479 ata_force_tbl = kcalloc(size, sizeof(ata_force_tbl[0]), GFP_KERNEL); 6480 if (!ata_force_tbl) { 6481 printk(KERN_WARNING "ata: failed to extend force table, " 6482 "libata.force ignored\n"); 6483 return; 6484 } 6485 6486 /* parse and populate the table */ 6487 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) { 6488 const char *reason = ""; 6489 struct ata_force_ent te = { .port = -1, .device = -1 }; 6490 6491 next = cur; 6492 if (ata_parse_force_one(&next, &te, &reason)) { 6493 printk(KERN_WARNING "ata: failed to parse force " 6494 "parameter \"%s\" (%s)\n", 6495 cur, reason); 6496 continue; 6497 } 6498 6499 if (te.port == -1) { 6500 te.port = last_port; 6501 te.device = last_device; 6502 } 6503 6504 ata_force_tbl[idx++] = te; 6505 6506 last_port = te.port; 6507 last_device = te.device; 6508 } 6509 6510 ata_force_tbl_size = idx; 6511 } 6512 6513 static void ata_free_force_param(void) 6514 { 6515 kfree(ata_force_tbl); 6516 } 6517 #else 6518 static inline void ata_parse_force_param(void) { } 6519 static inline void ata_free_force_param(void) { } 6520 #endif 6521 6522 static int __init ata_init(void) 6523 { 6524 int rc; 6525 6526 ata_parse_force_param(); 6527 6528 rc = ata_sff_init(); 6529 if (rc) { 6530 ata_free_force_param(); 6531 return rc; 6532 } 6533 6534 libata_transport_init(); 6535 ata_scsi_transport_template = ata_attach_transport(); 6536 if (!ata_scsi_transport_template) { 6537 ata_sff_exit(); 6538 rc = -ENOMEM; 6539 goto err_out; 6540 } 6541 6542 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); 6543 return 0; 6544 6545 err_out: 6546 return rc; 6547 } 6548 6549 static void __exit ata_exit(void) 6550 { 6551 ata_release_transport(ata_scsi_transport_template); 6552 libata_transport_exit(); 6553 ata_sff_exit(); 6554 ata_free_force_param(); 6555 } 6556 6557 subsys_initcall(ata_init); 6558 module_exit(ata_exit); 6559 6560 static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1); 6561 6562 int ata_ratelimit(void) 6563 { 6564 return __ratelimit(&ratelimit); 6565 } 6566 EXPORT_SYMBOL_GPL(ata_ratelimit); 6567 6568 /** 6569 * ata_msleep - ATA EH owner aware msleep 6570 * @ap: ATA port to attribute the sleep to 6571 * @msecs: duration to sleep in milliseconds 6572 * 6573 * Sleeps @msecs. If the current task is owner of @ap's EH, the 6574 * ownership is released before going to sleep and reacquired 6575 * after the sleep is complete. IOW, other ports sharing the 6576 * @ap->host will be allowed to own the EH while this task is 6577 * sleeping. 6578 * 6579 * LOCKING: 6580 * Might sleep. 6581 */ 6582 void ata_msleep(struct ata_port *ap, unsigned int msecs) 6583 { 6584 bool owns_eh = ap && ap->host->eh_owner == current; 6585 6586 if (owns_eh) 6587 ata_eh_release(ap); 6588 6589 if (msecs < 20) { 6590 unsigned long usecs = msecs * USEC_PER_MSEC; 6591 usleep_range(usecs, usecs + 50); 6592 } else { 6593 msleep(msecs); 6594 } 6595 6596 if (owns_eh) 6597 ata_eh_acquire(ap); 6598 } 6599 EXPORT_SYMBOL_GPL(ata_msleep); 6600 6601 /** 6602 * ata_wait_register - wait until register value changes 6603 * @ap: ATA port to wait register for, can be NULL 6604 * @reg: IO-mapped register 6605 * @mask: Mask to apply to read register value 6606 * @val: Wait condition 6607 * @interval: polling interval in milliseconds 6608 * @timeout: timeout in milliseconds 6609 * 6610 * Waiting for some bits of register to change is a common 6611 * operation for ATA controllers. This function reads 32bit LE 6612 * IO-mapped register @reg and tests for the following condition. 6613 * 6614 * (*@reg & mask) != val 6615 * 6616 * If the condition is met, it returns; otherwise, the process is 6617 * repeated after @interval_msec until timeout. 6618 * 6619 * LOCKING: 6620 * Kernel thread context (may sleep) 6621 * 6622 * RETURNS: 6623 * The final register value. 6624 */ 6625 u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val, 6626 unsigned int interval, unsigned int timeout) 6627 { 6628 unsigned long deadline; 6629 u32 tmp; 6630 6631 tmp = ioread32(reg); 6632 6633 /* Calculate timeout _after_ the first read to make sure 6634 * preceding writes reach the controller before starting to 6635 * eat away the timeout. 6636 */ 6637 deadline = ata_deadline(jiffies, timeout); 6638 6639 while ((tmp & mask) == val && time_before(jiffies, deadline)) { 6640 ata_msleep(ap, interval); 6641 tmp = ioread32(reg); 6642 } 6643 6644 return tmp; 6645 } 6646 EXPORT_SYMBOL_GPL(ata_wait_register); 6647 6648 /* 6649 * Dummy port_ops 6650 */ 6651 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) 6652 { 6653 return AC_ERR_SYSTEM; 6654 } 6655 6656 static void ata_dummy_error_handler(struct ata_port *ap) 6657 { 6658 /* truly dummy */ 6659 } 6660 6661 struct ata_port_operations ata_dummy_port_ops = { 6662 .qc_prep = ata_noop_qc_prep, 6663 .qc_issue = ata_dummy_qc_issue, 6664 .error_handler = ata_dummy_error_handler, 6665 .sched_eh = ata_std_sched_eh, 6666 .end_eh = ata_std_end_eh, 6667 }; 6668 EXPORT_SYMBOL_GPL(ata_dummy_port_ops); 6669 6670 const struct ata_port_info ata_dummy_port_info = { 6671 .port_ops = &ata_dummy_port_ops, 6672 }; 6673 EXPORT_SYMBOL_GPL(ata_dummy_port_info); 6674 6675 void ata_print_version(const struct device *dev, const char *version) 6676 { 6677 dev_printk(KERN_DEBUG, dev, "version %s\n", version); 6678 } 6679 EXPORT_SYMBOL(ata_print_version); 6680 6681 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_tf_load); 6682 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_exec_command); 6683 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_setup); 6684 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_start); 6685 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_status); 6686