1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Copyright 2008 ioogle, Inc. All rights reserved. 4 * 5 * Libata transport class. 6 * 7 * The ATA transport class contains common code to deal with ATA HBAs, 8 * an approximated representation of ATA topologies in the driver model, 9 * and various sysfs attributes to expose these topologies and management 10 * interfaces to user-space. 11 * 12 * There are 3 objects defined in this class: 13 * - ata_port 14 * - ata_link 15 * - ata_device 16 * Each port has a link object. Each link can have up to two devices for PATA 17 * and generally one for SATA. 18 * If there is SATA port multiplier [PMP], 15 additional ata_link object are 19 * created. 20 * 21 * These objects are created when the ata host is initialized and when a PMP is 22 * found. They are removed only when the HBA is removed, cleaned before the 23 * error handler runs. 24 */ 25 26 27#include <linux/kernel.h> 28#include <linux/blkdev.h> 29#include <linux/spinlock.h> 30#include <linux/slab.h> 31#include <scsi/scsi_transport.h> 32#include <linux/libata.h> 33#include <linux/hdreg.h> 34#include <linux/uaccess.h> 35#include <linux/pm_runtime.h> 36 37#include "libata.h" 38#include "libata-transport.h" 39 40#define ATA_PORT_ATTRS 3 41#define ATA_LINK_ATTRS 3 42#define ATA_DEV_ATTRS 9 43 44struct scsi_transport_template; 45struct scsi_transport_template *ata_scsi_transport_template; 46 47struct ata_internal { 48 struct scsi_transport_template t; 49 50 struct device_attribute private_port_attrs[ATA_PORT_ATTRS]; 51 struct device_attribute private_link_attrs[ATA_LINK_ATTRS]; 52 struct device_attribute private_dev_attrs[ATA_DEV_ATTRS]; 53 54 struct transport_container link_attr_cont; 55 struct transport_container dev_attr_cont; 56 57 /* 58 * The array of null terminated pointers to attributes 59 * needed by scsi_sysfs.c 60 */ 61 struct device_attribute *link_attrs[ATA_LINK_ATTRS + 1]; 62 struct device_attribute *port_attrs[ATA_PORT_ATTRS + 1]; 63 struct device_attribute *dev_attrs[ATA_DEV_ATTRS + 1]; 64}; 65#define to_ata_internal(tmpl) container_of(tmpl, struct ata_internal, t) 66 67 68#define tdev_to_device(d) \ 69 container_of((d), struct ata_device, tdev) 70#define transport_class_to_dev(dev) \ 71 tdev_to_device((dev)->parent) 72 73#define tdev_to_link(d) \ 74 container_of((d), struct ata_link, tdev) 75#define transport_class_to_link(dev) \ 76 tdev_to_link((dev)->parent) 77 78#define tdev_to_port(d) \ 79 container_of((d), struct ata_port, tdev) 80#define transport_class_to_port(dev) \ 81 tdev_to_port((dev)->parent) 82 83 84/* Device objects are always created whit link objects */ 85static int ata_tdev_add(struct ata_device *dev); 86static void ata_tdev_delete(struct ata_device *dev); 87 88 89/* 90 * Hack to allow attributes of the same name in different objects. 91 */ 92#define ATA_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ 93 struct device_attribute device_attr_##_prefix##_##_name = \ 94 __ATTR(_name,_mode,_show,_store) 95 96#define ata_bitfield_name_match(title, table) \ 97static ssize_t \ 98get_ata_##title##_names(u32 table_key, char *buf) \ 99{ \ 100 char *prefix = ""; \ 101 ssize_t len = 0; \ 102 int i; \ 103 \ 104 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 105 if (table[i].value & table_key) { \ 106 len += sprintf(buf + len, "%s%s", \ 107 prefix, table[i].name); \ 108 prefix = ", "; \ 109 } \ 110 } \ 111 len += sprintf(buf + len, "\n"); \ 112 return len; \ 113} 114 115#define ata_bitfield_name_search(title, table) \ 116static ssize_t \ 117get_ata_##title##_names(u32 table_key, char *buf) \ 118{ \ 119 ssize_t len = 0; \ 120 int i; \ 121 \ 122 for (i = 0; i < ARRAY_SIZE(table); i++) { \ 123 if (table[i].value == table_key) { \ 124 len += sprintf(buf + len, "%s", \ 125 table[i].name); \ 126 break; \ 127 } \ 128 } \ 129 len += sprintf(buf + len, "\n"); \ 130 return len; \ 131} 132 133static struct { 134 u32 value; 135 char *name; 136} ata_class_names[] = { 137 { ATA_DEV_UNKNOWN, "unknown" }, 138 { ATA_DEV_ATA, "ata" }, 139 { ATA_DEV_ATA_UNSUP, "ata" }, 140 { ATA_DEV_ATAPI, "atapi" }, 141 { ATA_DEV_ATAPI_UNSUP, "atapi" }, 142 { ATA_DEV_PMP, "pmp" }, 143 { ATA_DEV_PMP_UNSUP, "pmp" }, 144 { ATA_DEV_SEMB, "semb" }, 145 { ATA_DEV_SEMB_UNSUP, "semb" }, 146 { ATA_DEV_ZAC, "zac" }, 147 { ATA_DEV_NONE, "none" } 148}; 149ata_bitfield_name_search(class, ata_class_names) 150 151 152static struct { 153 u32 value; 154 char *name; 155} ata_err_names[] = { 156 { AC_ERR_DEV, "DeviceError" }, 157 { AC_ERR_HSM, "HostStateMachineError" }, 158 { AC_ERR_TIMEOUT, "Timeout" }, 159 { AC_ERR_MEDIA, "MediaError" }, 160 { AC_ERR_ATA_BUS, "BusError" }, 161 { AC_ERR_HOST_BUS, "HostBusError" }, 162 { AC_ERR_SYSTEM, "SystemError" }, 163 { AC_ERR_INVALID, "InvalidArg" }, 164 { AC_ERR_OTHER, "Unknown" }, 165 { AC_ERR_NODEV_HINT, "NoDeviceHint" }, 166 { AC_ERR_NCQ, "NCQError" } 167}; 168ata_bitfield_name_match(err, ata_err_names) 169 170static struct { 171 u32 value; 172 char *name; 173} ata_xfer_names[] = { 174 { XFER_UDMA_7, "XFER_UDMA_7" }, 175 { XFER_UDMA_6, "XFER_UDMA_6" }, 176 { XFER_UDMA_5, "XFER_UDMA_5" }, 177 { XFER_UDMA_4, "XFER_UDMA_4" }, 178 { XFER_UDMA_3, "XFER_UDMA_3" }, 179 { XFER_UDMA_2, "XFER_UDMA_2" }, 180 { XFER_UDMA_1, "XFER_UDMA_1" }, 181 { XFER_UDMA_0, "XFER_UDMA_0" }, 182 { XFER_MW_DMA_4, "XFER_MW_DMA_4" }, 183 { XFER_MW_DMA_3, "XFER_MW_DMA_3" }, 184 { XFER_MW_DMA_2, "XFER_MW_DMA_2" }, 185 { XFER_MW_DMA_1, "XFER_MW_DMA_1" }, 186 { XFER_MW_DMA_0, "XFER_MW_DMA_0" }, 187 { XFER_SW_DMA_2, "XFER_SW_DMA_2" }, 188 { XFER_SW_DMA_1, "XFER_SW_DMA_1" }, 189 { XFER_SW_DMA_0, "XFER_SW_DMA_0" }, 190 { XFER_PIO_6, "XFER_PIO_6" }, 191 { XFER_PIO_5, "XFER_PIO_5" }, 192 { XFER_PIO_4, "XFER_PIO_4" }, 193 { XFER_PIO_3, "XFER_PIO_3" }, 194 { XFER_PIO_2, "XFER_PIO_2" }, 195 { XFER_PIO_1, "XFER_PIO_1" }, 196 { XFER_PIO_0, "XFER_PIO_0" }, 197 { XFER_PIO_SLOW, "XFER_PIO_SLOW" } 198}; 199ata_bitfield_name_search(xfer, ata_xfer_names) 200 201/* 202 * ATA Port attributes 203 */ 204#define ata_port_show_simple(field, name, format_string, cast) \ 205static ssize_t \ 206show_ata_port_##name(struct device *dev, \ 207 struct device_attribute *attr, char *buf) \ 208{ \ 209 struct ata_port *ap = transport_class_to_port(dev); \ 210 \ 211 return scnprintf(buf, 20, format_string, cast ap->field); \ 212} 213 214#define ata_port_simple_attr(field, name, format_string, type) \ 215 ata_port_show_simple(field, name, format_string, (type)) \ 216static DEVICE_ATTR(name, S_IRUGO, show_ata_port_##name, NULL) 217 218ata_port_simple_attr(nr_pmp_links, nr_pmp_links, "%d\n", int); 219ata_port_simple_attr(stats.idle_irq, idle_irq, "%ld\n", unsigned long); 220ata_port_simple_attr(local_port_no, port_no, "%u\n", unsigned int); 221 222static DECLARE_TRANSPORT_CLASS(ata_port_class, 223 "ata_port", NULL, NULL, NULL); 224 225static void ata_tport_release(struct device *dev) 226{ 227 struct ata_port *ap = tdev_to_port(dev); 228 ata_host_put(ap->host); 229} 230 231/** 232 * ata_is_port -- check if a struct device represents a ATA port 233 * @dev: device to check 234 * 235 * Returns: 236 * %1 if the device represents a ATA Port, %0 else 237 */ 238static int ata_is_port(const struct device *dev) 239{ 240 return dev->release == ata_tport_release; 241} 242 243static int ata_tport_match(struct attribute_container *cont, 244 struct device *dev) 245{ 246 if (!ata_is_port(dev)) 247 return 0; 248 return &ata_scsi_transport_template->host_attrs.ac == cont; 249} 250 251/** 252 * ata_tport_delete -- remove ATA PORT 253 * @ap: ATA PORT to remove 254 * 255 * Removes the specified ATA PORT. Remove the associated link as well. 256 */ 257void ata_tport_delete(struct ata_port *ap) 258{ 259 struct device *dev = &ap->tdev; 260 261 ata_tlink_delete(&ap->link); 262 263 transport_remove_device(dev); 264 device_del(dev); 265 transport_destroy_device(dev); 266 put_device(dev); 267} 268 269static const struct device_type ata_port_sas_type = { 270 .name = ATA_PORT_TYPE_NAME, 271}; 272 273/** ata_tport_add - initialize a transport ATA port structure 274 * 275 * @parent: parent device 276 * @ap: existing ata_port structure 277 * 278 * Initialize a ATA port structure for sysfs. It will be added to the device 279 * tree below the device specified by @parent which could be a PCI device. 280 * 281 * Returns %0 on success 282 */ 283int ata_tport_add(struct device *parent, 284 struct ata_port *ap) 285{ 286 int error; 287 struct device *dev = &ap->tdev; 288 289 device_initialize(dev); 290 if (ap->flags & ATA_FLAG_SAS_HOST) 291 dev->type = &ata_port_sas_type; 292 else 293 dev->type = &ata_port_type; 294 295 dev->parent = parent; 296 ata_host_get(ap->host); 297 dev->release = ata_tport_release; 298 dev_set_name(dev, "ata%d", ap->print_id); 299 transport_setup_device(dev); 300 ata_acpi_bind_port(ap); 301 error = device_add(dev); 302 if (error) { 303 goto tport_err; 304 } 305 306 device_enable_async_suspend(dev); 307 pm_runtime_set_active(dev); 308 pm_runtime_enable(dev); 309 pm_runtime_forbid(dev); 310 311 error = transport_add_device(dev); 312 if (error) 313 goto tport_transport_add_err; 314 transport_configure_device(dev); 315 316 error = ata_tlink_add(&ap->link); 317 if (error) { 318 goto tport_link_err; 319 } 320 return 0; 321 322 tport_link_err: 323 transport_remove_device(dev); 324 tport_transport_add_err: 325 device_del(dev); 326 327 tport_err: 328 transport_destroy_device(dev); 329 put_device(dev); 330 return error; 331} 332 333/** 334 * ata_port_classify - determine device type based on ATA-spec signature 335 * @ap: ATA port device on which the classification should be run 336 * @tf: ATA taskfile register set for device to be identified 337 * 338 * A wrapper around ata_dev_classify() to provide additional logging 339 * 340 * RETURNS: 341 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP, 342 * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure. 343 */ 344unsigned int ata_port_classify(struct ata_port *ap, 345 const struct ata_taskfile *tf) 346{ 347 int i; 348 unsigned int class = ata_dev_classify(tf); 349 350 /* Start with index '1' to skip the 'unknown' entry */ 351 for (i = 1; i < ARRAY_SIZE(ata_class_names); i++) { 352 if (ata_class_names[i].value == class) { 353 ata_port_dbg(ap, "found %s device by sig\n", 354 ata_class_names[i].name); 355 return class; 356 } 357 } 358 359 ata_port_info(ap, "found unknown device (class %u)\n", class); 360 return class; 361} 362EXPORT_SYMBOL_GPL(ata_port_classify); 363 364/* 365 * ATA link attributes 366 */ 367static int noop(int x) { return x; } 368 369#define ata_link_show_linkspeed(field, format) \ 370static ssize_t \ 371show_ata_link_##field(struct device *dev, \ 372 struct device_attribute *attr, char *buf) \ 373{ \ 374 struct ata_link *link = transport_class_to_link(dev); \ 375 \ 376 return sprintf(buf, "%s\n", sata_spd_string(format(link->field))); \ 377} 378 379#define ata_link_linkspeed_attr(field, format) \ 380 ata_link_show_linkspeed(field, format) \ 381static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL) 382 383ata_link_linkspeed_attr(hw_sata_spd_limit, fls); 384ata_link_linkspeed_attr(sata_spd_limit, fls); 385ata_link_linkspeed_attr(sata_spd, noop); 386 387 388static DECLARE_TRANSPORT_CLASS(ata_link_class, 389 "ata_link", NULL, NULL, NULL); 390 391static void ata_tlink_release(struct device *dev) 392{ 393} 394 395/** 396 * ata_is_link -- check if a struct device represents a ATA link 397 * @dev: device to check 398 * 399 * Returns: 400 * %1 if the device represents a ATA link, %0 else 401 */ 402static int ata_is_link(const struct device *dev) 403{ 404 return dev->release == ata_tlink_release; 405} 406 407static int ata_tlink_match(struct attribute_container *cont, 408 struct device *dev) 409{ 410 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); 411 if (!ata_is_link(dev)) 412 return 0; 413 return &i->link_attr_cont.ac == cont; 414} 415 416/** 417 * ata_tlink_delete -- remove ATA LINK 418 * @link: ATA LINK to remove 419 * 420 * Removes the specified ATA LINK. remove associated ATA device(s) as well. 421 */ 422void ata_tlink_delete(struct ata_link *link) 423{ 424 struct device *dev = &link->tdev; 425 struct ata_device *ata_dev; 426 427 ata_for_each_dev(ata_dev, link, ALL) { 428 ata_tdev_delete(ata_dev); 429 } 430 431 transport_remove_device(dev); 432 device_del(dev); 433 transport_destroy_device(dev); 434 put_device(dev); 435} 436 437/** 438 * ata_tlink_add -- initialize a transport ATA link structure 439 * @link: allocated ata_link structure. 440 * 441 * Initialize an ATA LINK structure for sysfs. It will be added in the 442 * device tree below the ATA PORT it belongs to. 443 * 444 * Returns %0 on success 445 */ 446int ata_tlink_add(struct ata_link *link) 447{ 448 struct device *dev = &link->tdev; 449 struct ata_port *ap = link->ap; 450 struct ata_device *ata_dev; 451 int error; 452 453 device_initialize(dev); 454 dev->parent = &ap->tdev; 455 dev->release = ata_tlink_release; 456 if (ata_is_host_link(link)) 457 dev_set_name(dev, "link%d", ap->print_id); 458 else 459 dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp); 460 461 transport_setup_device(dev); 462 463 error = device_add(dev); 464 if (error) { 465 goto tlink_err; 466 } 467 468 error = transport_add_device(dev); 469 if (error) 470 goto tlink_transport_err; 471 transport_configure_device(dev); 472 473 ata_for_each_dev(ata_dev, link, ALL) { 474 error = ata_tdev_add(ata_dev); 475 if (error) { 476 goto tlink_dev_err; 477 } 478 } 479 return 0; 480 tlink_dev_err: 481 while (--ata_dev >= link->device) { 482 ata_tdev_delete(ata_dev); 483 } 484 transport_remove_device(dev); 485 tlink_transport_err: 486 device_del(dev); 487 tlink_err: 488 transport_destroy_device(dev); 489 put_device(dev); 490 return error; 491} 492 493/* 494 * ATA device attributes 495 */ 496 497#define ata_dev_show_class(title, field) \ 498static ssize_t \ 499show_ata_dev_##field(struct device *dev, \ 500 struct device_attribute *attr, char *buf) \ 501{ \ 502 struct ata_device *ata_dev = transport_class_to_dev(dev); \ 503 \ 504 return get_ata_##title##_names(ata_dev->field, buf); \ 505} 506 507#define ata_dev_attr(title, field) \ 508 ata_dev_show_class(title, field) \ 509static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL) 510 511ata_dev_attr(class, class); 512ata_dev_attr(xfer, pio_mode); 513ata_dev_attr(xfer, dma_mode); 514ata_dev_attr(xfer, xfer_mode); 515 516 517#define ata_dev_show_simple(field, format_string, cast) \ 518static ssize_t \ 519show_ata_dev_##field(struct device *dev, \ 520 struct device_attribute *attr, char *buf) \ 521{ \ 522 struct ata_device *ata_dev = transport_class_to_dev(dev); \ 523 \ 524 return scnprintf(buf, 20, format_string, cast ata_dev->field); \ 525} 526 527#define ata_dev_simple_attr(field, format_string, type) \ 528 ata_dev_show_simple(field, format_string, (type)) \ 529 static DEVICE_ATTR(field, S_IRUGO, \ 530 show_ata_dev_##field, NULL) 531 532ata_dev_simple_attr(spdn_cnt, "%d\n", int); 533 534struct ata_show_ering_arg { 535 char* buf; 536 int written; 537}; 538 539static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg) 540{ 541 struct ata_show_ering_arg* arg = void_arg; 542 u64 seconds; 543 u32 rem; 544 545 seconds = div_u64_rem(ent->timestamp, HZ, &rem); 546 arg->written += sprintf(arg->buf + arg->written, 547 "[%5llu.%09lu]", seconds, 548 rem * NSEC_PER_SEC / HZ); 549 arg->written += get_ata_err_names(ent->err_mask, 550 arg->buf + arg->written); 551 return 0; 552} 553 554static ssize_t 555show_ata_dev_ering(struct device *dev, 556 struct device_attribute *attr, char *buf) 557{ 558 struct ata_device *ata_dev = transport_class_to_dev(dev); 559 struct ata_show_ering_arg arg = { buf, 0 }; 560 561 ata_ering_map(&ata_dev->ering, ata_show_ering, &arg); 562 return arg.written; 563} 564 565 566static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL); 567 568static ssize_t 569show_ata_dev_id(struct device *dev, 570 struct device_attribute *attr, char *buf) 571{ 572 struct ata_device *ata_dev = transport_class_to_dev(dev); 573 int written = 0, i = 0; 574 575 if (ata_dev->class == ATA_DEV_PMP) 576 return 0; 577 for(i=0;i<ATA_ID_WORDS;i++) { 578 written += scnprintf(buf+written, 20, "%04x%c", 579 ata_dev->id[i], 580 ((i+1) & 7) ? ' ' : '\n'); 581 } 582 return written; 583} 584 585static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL); 586 587static ssize_t 588show_ata_dev_gscr(struct device *dev, 589 struct device_attribute *attr, char *buf) 590{ 591 struct ata_device *ata_dev = transport_class_to_dev(dev); 592 int written = 0, i = 0; 593 594 if (ata_dev->class != ATA_DEV_PMP) 595 return 0; 596 for(i=0;i<SATA_PMP_GSCR_DWORDS;i++) { 597 written += scnprintf(buf+written, 20, "%08x%c", 598 ata_dev->gscr[i], 599 ((i+1) & 3) ? ' ' : '\n'); 600 } 601 if (SATA_PMP_GSCR_DWORDS & 3) 602 buf[written-1] = '\n'; 603 return written; 604} 605 606static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL); 607 608static ssize_t 609show_ata_dev_trim(struct device *dev, 610 struct device_attribute *attr, char *buf) 611{ 612 struct ata_device *ata_dev = transport_class_to_dev(dev); 613 unsigned char *mode; 614 615 if (!ata_id_has_trim(ata_dev->id)) 616 mode = "unsupported"; 617 else if (ata_dev->horkage & ATA_HORKAGE_NOTRIM) 618 mode = "forced_unsupported"; 619 else if (ata_dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) 620 mode = "forced_unqueued"; 621 else if (ata_fpdma_dsm_supported(ata_dev)) 622 mode = "queued"; 623 else 624 mode = "unqueued"; 625 626 return scnprintf(buf, 20, "%s\n", mode); 627} 628 629static DEVICE_ATTR(trim, S_IRUGO, show_ata_dev_trim, NULL); 630 631static DECLARE_TRANSPORT_CLASS(ata_dev_class, 632 "ata_device", NULL, NULL, NULL); 633 634static void ata_tdev_release(struct device *dev) 635{ 636} 637 638/** 639 * ata_is_ata_dev -- check if a struct device represents a ATA device 640 * @dev: device to check 641 * 642 * Returns: 643 * %1 if the device represents a ATA device, %0 else 644 */ 645static int ata_is_ata_dev(const struct device *dev) 646{ 647 return dev->release == ata_tdev_release; 648} 649 650static int ata_tdev_match(struct attribute_container *cont, 651 struct device *dev) 652{ 653 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); 654 if (!ata_is_ata_dev(dev)) 655 return 0; 656 return &i->dev_attr_cont.ac == cont; 657} 658 659/** 660 * ata_tdev_free -- free a ATA LINK 661 * @dev: ATA PHY to free 662 * 663 * Frees the specified ATA PHY. 664 * 665 * Note: 666 * This function must only be called on a PHY that has not 667 * successfully been added using ata_tdev_add(). 668 */ 669static void ata_tdev_free(struct ata_device *dev) 670{ 671 transport_destroy_device(&dev->tdev); 672 put_device(&dev->tdev); 673} 674 675/** 676 * ata_tdev_delete -- remove ATA device 677 * @ata_dev: ATA device to remove 678 * 679 * Removes the specified ATA device. 680 */ 681static void ata_tdev_delete(struct ata_device *ata_dev) 682{ 683 struct device *dev = &ata_dev->tdev; 684 685 transport_remove_device(dev); 686 device_del(dev); 687 ata_tdev_free(ata_dev); 688} 689 690 691/** 692 * ata_tdev_add -- initialize a transport ATA device structure. 693 * @ata_dev: ata_dev structure. 694 * 695 * Initialize an ATA device structure for sysfs. It will be added in the 696 * device tree below the ATA LINK device it belongs to. 697 * 698 * Returns %0 on success 699 */ 700static int ata_tdev_add(struct ata_device *ata_dev) 701{ 702 struct device *dev = &ata_dev->tdev; 703 struct ata_link *link = ata_dev->link; 704 struct ata_port *ap = link->ap; 705 int error; 706 707 device_initialize(dev); 708 dev->parent = &link->tdev; 709 dev->release = ata_tdev_release; 710 if (ata_is_host_link(link)) 711 dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno); 712 else 713 dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp); 714 715 transport_setup_device(dev); 716 ata_acpi_bind_dev(ata_dev); 717 error = device_add(dev); 718 if (error) { 719 ata_tdev_free(ata_dev); 720 return error; 721 } 722 723 error = transport_add_device(dev); 724 if (error) { 725 device_del(dev); 726 ata_tdev_free(ata_dev); 727 return error; 728 } 729 730 transport_configure_device(dev); 731 return 0; 732} 733 734 735/* 736 * Setup / Teardown code 737 */ 738 739#define SETUP_TEMPLATE(attrb, field, perm, test) \ 740 i->private_##attrb[count] = dev_attr_##field; \ 741 i->private_##attrb[count].attr.mode = perm; \ 742 i->attrb[count] = &i->private_##attrb[count]; \ 743 if (test) \ 744 count++ 745 746#define SETUP_LINK_ATTRIBUTE(field) \ 747 SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1) 748 749#define SETUP_PORT_ATTRIBUTE(field) \ 750 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1) 751 752#define SETUP_DEV_ATTRIBUTE(field) \ 753 SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1) 754 755/** 756 * ata_attach_transport -- instantiate ATA transport template 757 */ 758struct scsi_transport_template *ata_attach_transport(void) 759{ 760 struct ata_internal *i; 761 int count; 762 763 i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL); 764 if (!i) 765 return NULL; 766 767 i->t.eh_strategy_handler = ata_scsi_error; 768 i->t.user_scan = ata_scsi_user_scan; 769 770 i->t.host_attrs.ac.attrs = &i->port_attrs[0]; 771 i->t.host_attrs.ac.class = &ata_port_class.class; 772 i->t.host_attrs.ac.match = ata_tport_match; 773 transport_container_register(&i->t.host_attrs); 774 775 i->link_attr_cont.ac.class = &ata_link_class.class; 776 i->link_attr_cont.ac.attrs = &i->link_attrs[0]; 777 i->link_attr_cont.ac.match = ata_tlink_match; 778 transport_container_register(&i->link_attr_cont); 779 780 i->dev_attr_cont.ac.class = &ata_dev_class.class; 781 i->dev_attr_cont.ac.attrs = &i->dev_attrs[0]; 782 i->dev_attr_cont.ac.match = ata_tdev_match; 783 transport_container_register(&i->dev_attr_cont); 784 785 count = 0; 786 SETUP_PORT_ATTRIBUTE(nr_pmp_links); 787 SETUP_PORT_ATTRIBUTE(idle_irq); 788 SETUP_PORT_ATTRIBUTE(port_no); 789 BUG_ON(count > ATA_PORT_ATTRS); 790 i->port_attrs[count] = NULL; 791 792 count = 0; 793 SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit); 794 SETUP_LINK_ATTRIBUTE(sata_spd_limit); 795 SETUP_LINK_ATTRIBUTE(sata_spd); 796 BUG_ON(count > ATA_LINK_ATTRS); 797 i->link_attrs[count] = NULL; 798 799 count = 0; 800 SETUP_DEV_ATTRIBUTE(class); 801 SETUP_DEV_ATTRIBUTE(pio_mode); 802 SETUP_DEV_ATTRIBUTE(dma_mode); 803 SETUP_DEV_ATTRIBUTE(xfer_mode); 804 SETUP_DEV_ATTRIBUTE(spdn_cnt); 805 SETUP_DEV_ATTRIBUTE(ering); 806 SETUP_DEV_ATTRIBUTE(id); 807 SETUP_DEV_ATTRIBUTE(gscr); 808 SETUP_DEV_ATTRIBUTE(trim); 809 BUG_ON(count > ATA_DEV_ATTRS); 810 i->dev_attrs[count] = NULL; 811 812 return &i->t; 813} 814 815/** 816 * ata_release_transport -- release ATA transport template instance 817 * @t: transport template instance 818 */ 819void ata_release_transport(struct scsi_transport_template *t) 820{ 821 struct ata_internal *i = to_ata_internal(t); 822 823 transport_container_unregister(&i->t.host_attrs); 824 transport_container_unregister(&i->link_attr_cont); 825 transport_container_unregister(&i->dev_attr_cont); 826 827 kfree(i); 828} 829 830__init int libata_transport_init(void) 831{ 832 int error; 833 834 error = transport_class_register(&ata_link_class); 835 if (error) 836 goto out_unregister_transport; 837 error = transport_class_register(&ata_port_class); 838 if (error) 839 goto out_unregister_link; 840 error = transport_class_register(&ata_dev_class); 841 if (error) 842 goto out_unregister_port; 843 return 0; 844 845 out_unregister_port: 846 transport_class_unregister(&ata_port_class); 847 out_unregister_link: 848 transport_class_unregister(&ata_link_class); 849 out_unregister_transport: 850 return error; 851 852} 853 854void __exit libata_transport_exit(void) 855{ 856 transport_class_unregister(&ata_link_class); 857 transport_class_unregister(&ata_port_class); 858 transport_class_unregister(&ata_dev_class); 859} 860