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 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 * @port: 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/* 335 * ATA link attributes 336 */ 337static int noop(int x) { return x; } 338 339#define ata_link_show_linkspeed(field, format) \ 340static ssize_t \ 341show_ata_link_##field(struct device *dev, \ 342 struct device_attribute *attr, char *buf) \ 343{ \ 344 struct ata_link *link = transport_class_to_link(dev); \ 345 \ 346 return sprintf(buf, "%s\n", sata_spd_string(format(link->field))); \ 347} 348 349#define ata_link_linkspeed_attr(field, format) \ 350 ata_link_show_linkspeed(field, format) \ 351static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL) 352 353ata_link_linkspeed_attr(hw_sata_spd_limit, fls); 354ata_link_linkspeed_attr(sata_spd_limit, fls); 355ata_link_linkspeed_attr(sata_spd, noop); 356 357 358static DECLARE_TRANSPORT_CLASS(ata_link_class, 359 "ata_link", NULL, NULL, NULL); 360 361static void ata_tlink_release(struct device *dev) 362{ 363} 364 365/** 366 * ata_is_link -- check if a struct device represents a ATA link 367 * @dev: device to check 368 * 369 * Returns: 370 * %1 if the device represents a ATA link, %0 else 371 */ 372static int ata_is_link(const struct device *dev) 373{ 374 return dev->release == ata_tlink_release; 375} 376 377static int ata_tlink_match(struct attribute_container *cont, 378 struct device *dev) 379{ 380 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); 381 if (!ata_is_link(dev)) 382 return 0; 383 return &i->link_attr_cont.ac == cont; 384} 385 386/** 387 * ata_tlink_delete -- remove ATA LINK 388 * @port: ATA LINK to remove 389 * 390 * Removes the specified ATA LINK. remove associated ATA device(s) as well. 391 */ 392void ata_tlink_delete(struct ata_link *link) 393{ 394 struct device *dev = &link->tdev; 395 struct ata_device *ata_dev; 396 397 ata_for_each_dev(ata_dev, link, ALL) { 398 ata_tdev_delete(ata_dev); 399 } 400 401 transport_remove_device(dev); 402 device_del(dev); 403 transport_destroy_device(dev); 404 put_device(dev); 405} 406 407/** 408 * ata_tlink_add -- initialize a transport ATA link structure 409 * @link: allocated ata_link structure. 410 * 411 * Initialize an ATA LINK structure for sysfs. It will be added in the 412 * device tree below the ATA PORT it belongs to. 413 * 414 * Returns %0 on success 415 */ 416int ata_tlink_add(struct ata_link *link) 417{ 418 struct device *dev = &link->tdev; 419 struct ata_port *ap = link->ap; 420 struct ata_device *ata_dev; 421 int error; 422 423 device_initialize(dev); 424 dev->parent = &ap->tdev; 425 dev->release = ata_tlink_release; 426 if (ata_is_host_link(link)) 427 dev_set_name(dev, "link%d", ap->print_id); 428 else 429 dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp); 430 431 transport_setup_device(dev); 432 433 error = device_add(dev); 434 if (error) { 435 goto tlink_err; 436 } 437 438 error = transport_add_device(dev); 439 if (error) 440 goto tlink_transport_err; 441 transport_configure_device(dev); 442 443 ata_for_each_dev(ata_dev, link, ALL) { 444 error = ata_tdev_add(ata_dev); 445 if (error) { 446 goto tlink_dev_err; 447 } 448 } 449 return 0; 450 tlink_dev_err: 451 while (--ata_dev >= link->device) { 452 ata_tdev_delete(ata_dev); 453 } 454 transport_remove_device(dev); 455 tlink_transport_err: 456 device_del(dev); 457 tlink_err: 458 transport_destroy_device(dev); 459 put_device(dev); 460 return error; 461} 462 463/* 464 * ATA device attributes 465 */ 466 467#define ata_dev_show_class(title, field) \ 468static ssize_t \ 469show_ata_dev_##field(struct device *dev, \ 470 struct device_attribute *attr, char *buf) \ 471{ \ 472 struct ata_device *ata_dev = transport_class_to_dev(dev); \ 473 \ 474 return get_ata_##title##_names(ata_dev->field, buf); \ 475} 476 477#define ata_dev_attr(title, field) \ 478 ata_dev_show_class(title, field) \ 479static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL) 480 481ata_dev_attr(class, class); 482ata_dev_attr(xfer, pio_mode); 483ata_dev_attr(xfer, dma_mode); 484ata_dev_attr(xfer, xfer_mode); 485 486 487#define ata_dev_show_simple(field, format_string, cast) \ 488static ssize_t \ 489show_ata_dev_##field(struct device *dev, \ 490 struct device_attribute *attr, char *buf) \ 491{ \ 492 struct ata_device *ata_dev = transport_class_to_dev(dev); \ 493 \ 494 return scnprintf(buf, 20, format_string, cast ata_dev->field); \ 495} 496 497#define ata_dev_simple_attr(field, format_string, type) \ 498 ata_dev_show_simple(field, format_string, (type)) \ 499static DEVICE_ATTR(field, S_IRUGO, \ 500 show_ata_dev_##field, NULL) 501 502ata_dev_simple_attr(spdn_cnt, "%d\n", int); 503 504struct ata_show_ering_arg { 505 char* buf; 506 int written; 507}; 508 509static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg) 510{ 511 struct ata_show_ering_arg* arg = void_arg; 512 u64 seconds; 513 u32 rem; 514 515 seconds = div_u64_rem(ent->timestamp, HZ, &rem); 516 arg->written += sprintf(arg->buf + arg->written, 517 "[%5llu.%09lu]", seconds, 518 rem * NSEC_PER_SEC / HZ); 519 arg->written += get_ata_err_names(ent->err_mask, 520 arg->buf + arg->written); 521 return 0; 522} 523 524static ssize_t 525show_ata_dev_ering(struct device *dev, 526 struct device_attribute *attr, char *buf) 527{ 528 struct ata_device *ata_dev = transport_class_to_dev(dev); 529 struct ata_show_ering_arg arg = { buf, 0 }; 530 531 ata_ering_map(&ata_dev->ering, ata_show_ering, &arg); 532 return arg.written; 533} 534 535 536static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL); 537 538static ssize_t 539show_ata_dev_id(struct device *dev, 540 struct device_attribute *attr, char *buf) 541{ 542 struct ata_device *ata_dev = transport_class_to_dev(dev); 543 int written = 0, i = 0; 544 545 if (ata_dev->class == ATA_DEV_PMP) 546 return 0; 547 for(i=0;i<ATA_ID_WORDS;i++) { 548 written += scnprintf(buf+written, 20, "%04x%c", 549 ata_dev->id[i], 550 ((i+1) & 7) ? ' ' : '\n'); 551 } 552 return written; 553} 554 555static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL); 556 557static ssize_t 558show_ata_dev_gscr(struct device *dev, 559 struct device_attribute *attr, char *buf) 560{ 561 struct ata_device *ata_dev = transport_class_to_dev(dev); 562 int written = 0, i = 0; 563 564 if (ata_dev->class != ATA_DEV_PMP) 565 return 0; 566 for(i=0;i<SATA_PMP_GSCR_DWORDS;i++) { 567 written += scnprintf(buf+written, 20, "%08x%c", 568 ata_dev->gscr[i], 569 ((i+1) & 3) ? ' ' : '\n'); 570 } 571 if (SATA_PMP_GSCR_DWORDS & 3) 572 buf[written-1] = '\n'; 573 return written; 574} 575 576static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL); 577 578static ssize_t 579show_ata_dev_trim(struct device *dev, 580 struct device_attribute *attr, char *buf) 581{ 582 struct ata_device *ata_dev = transport_class_to_dev(dev); 583 unsigned char *mode; 584 585 if (!ata_id_has_trim(ata_dev->id)) 586 mode = "unsupported"; 587 else if (ata_dev->horkage & ATA_HORKAGE_NOTRIM) 588 mode = "forced_unsupported"; 589 else if (ata_dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) 590 mode = "forced_unqueued"; 591 else if (ata_fpdma_dsm_supported(ata_dev)) 592 mode = "queued"; 593 else 594 mode = "unqueued"; 595 596 return scnprintf(buf, 20, "%s\n", mode); 597} 598 599static DEVICE_ATTR(trim, S_IRUGO, show_ata_dev_trim, NULL); 600 601static DECLARE_TRANSPORT_CLASS(ata_dev_class, 602 "ata_device", NULL, NULL, NULL); 603 604static void ata_tdev_release(struct device *dev) 605{ 606} 607 608/** 609 * ata_is_ata_dev -- check if a struct device represents a ATA device 610 * @dev: device to check 611 * 612 * Returns: 613 * %1 if the device represents a ATA device, %0 else 614 */ 615static int ata_is_ata_dev(const struct device *dev) 616{ 617 return dev->release == ata_tdev_release; 618} 619 620static int ata_tdev_match(struct attribute_container *cont, 621 struct device *dev) 622{ 623 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); 624 if (!ata_is_ata_dev(dev)) 625 return 0; 626 return &i->dev_attr_cont.ac == cont; 627} 628 629/** 630 * ata_tdev_free -- free a ATA LINK 631 * @dev: ATA PHY to free 632 * 633 * Frees the specified ATA PHY. 634 * 635 * Note: 636 * This function must only be called on a PHY that has not 637 * successfully been added using ata_tdev_add(). 638 */ 639static void ata_tdev_free(struct ata_device *dev) 640{ 641 transport_destroy_device(&dev->tdev); 642 put_device(&dev->tdev); 643} 644 645/** 646 * ata_tdev_delete -- remove ATA device 647 * @port: ATA PORT to remove 648 * 649 * Removes the specified ATA device. 650 */ 651static void ata_tdev_delete(struct ata_device *ata_dev) 652{ 653 struct device *dev = &ata_dev->tdev; 654 655 transport_remove_device(dev); 656 device_del(dev); 657 ata_tdev_free(ata_dev); 658} 659 660 661/** 662 * ata_tdev_add -- initialize a transport ATA device structure. 663 * @ata_dev: ata_dev structure. 664 * 665 * Initialize an ATA device structure for sysfs. It will be added in the 666 * device tree below the ATA LINK device it belongs to. 667 * 668 * Returns %0 on success 669 */ 670static int ata_tdev_add(struct ata_device *ata_dev) 671{ 672 struct device *dev = &ata_dev->tdev; 673 struct ata_link *link = ata_dev->link; 674 struct ata_port *ap = link->ap; 675 int error; 676 677 device_initialize(dev); 678 dev->parent = &link->tdev; 679 dev->release = ata_tdev_release; 680 if (ata_is_host_link(link)) 681 dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno); 682 else 683 dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp); 684 685 transport_setup_device(dev); 686 ata_acpi_bind_dev(ata_dev); 687 error = device_add(dev); 688 if (error) { 689 ata_tdev_free(ata_dev); 690 return error; 691 } 692 693 error = transport_add_device(dev); 694 if (error) { 695 device_del(dev); 696 ata_tdev_free(ata_dev); 697 return error; 698 } 699 700 transport_configure_device(dev); 701 return 0; 702} 703 704 705/* 706 * Setup / Teardown code 707 */ 708 709#define SETUP_TEMPLATE(attrb, field, perm, test) \ 710 i->private_##attrb[count] = dev_attr_##field; \ 711 i->private_##attrb[count].attr.mode = perm; \ 712 i->attrb[count] = &i->private_##attrb[count]; \ 713 if (test) \ 714 count++ 715 716#define SETUP_LINK_ATTRIBUTE(field) \ 717 SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1) 718 719#define SETUP_PORT_ATTRIBUTE(field) \ 720 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1) 721 722#define SETUP_DEV_ATTRIBUTE(field) \ 723 SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1) 724 725/** 726 * ata_attach_transport -- instantiate ATA transport template 727 */ 728struct scsi_transport_template *ata_attach_transport(void) 729{ 730 struct ata_internal *i; 731 int count; 732 733 i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL); 734 if (!i) 735 return NULL; 736 737 i->t.eh_strategy_handler = ata_scsi_error; 738 i->t.user_scan = ata_scsi_user_scan; 739 740 i->t.host_attrs.ac.attrs = &i->port_attrs[0]; 741 i->t.host_attrs.ac.class = &ata_port_class.class; 742 i->t.host_attrs.ac.match = ata_tport_match; 743 transport_container_register(&i->t.host_attrs); 744 745 i->link_attr_cont.ac.class = &ata_link_class.class; 746 i->link_attr_cont.ac.attrs = &i->link_attrs[0]; 747 i->link_attr_cont.ac.match = ata_tlink_match; 748 transport_container_register(&i->link_attr_cont); 749 750 i->dev_attr_cont.ac.class = &ata_dev_class.class; 751 i->dev_attr_cont.ac.attrs = &i->dev_attrs[0]; 752 i->dev_attr_cont.ac.match = ata_tdev_match; 753 transport_container_register(&i->dev_attr_cont); 754 755 count = 0; 756 SETUP_PORT_ATTRIBUTE(nr_pmp_links); 757 SETUP_PORT_ATTRIBUTE(idle_irq); 758 SETUP_PORT_ATTRIBUTE(port_no); 759 BUG_ON(count > ATA_PORT_ATTRS); 760 i->port_attrs[count] = NULL; 761 762 count = 0; 763 SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit); 764 SETUP_LINK_ATTRIBUTE(sata_spd_limit); 765 SETUP_LINK_ATTRIBUTE(sata_spd); 766 BUG_ON(count > ATA_LINK_ATTRS); 767 i->link_attrs[count] = NULL; 768 769 count = 0; 770 SETUP_DEV_ATTRIBUTE(class); 771 SETUP_DEV_ATTRIBUTE(pio_mode); 772 SETUP_DEV_ATTRIBUTE(dma_mode); 773 SETUP_DEV_ATTRIBUTE(xfer_mode); 774 SETUP_DEV_ATTRIBUTE(spdn_cnt); 775 SETUP_DEV_ATTRIBUTE(ering); 776 SETUP_DEV_ATTRIBUTE(id); 777 SETUP_DEV_ATTRIBUTE(gscr); 778 SETUP_DEV_ATTRIBUTE(trim); 779 BUG_ON(count > ATA_DEV_ATTRS); 780 i->dev_attrs[count] = NULL; 781 782 return &i->t; 783} 784 785/** 786 * ata_release_transport -- release ATA transport template instance 787 * @t: transport template instance 788 */ 789void ata_release_transport(struct scsi_transport_template *t) 790{ 791 struct ata_internal *i = to_ata_internal(t); 792 793 transport_container_unregister(&i->t.host_attrs); 794 transport_container_unregister(&i->link_attr_cont); 795 transport_container_unregister(&i->dev_attr_cont); 796 797 kfree(i); 798} 799 800__init int libata_transport_init(void) 801{ 802 int error; 803 804 error = transport_class_register(&ata_link_class); 805 if (error) 806 goto out_unregister_transport; 807 error = transport_class_register(&ata_port_class); 808 if (error) 809 goto out_unregister_link; 810 error = transport_class_register(&ata_dev_class); 811 if (error) 812 goto out_unregister_port; 813 return 0; 814 815 out_unregister_port: 816 transport_class_unregister(&ata_port_class); 817 out_unregister_link: 818 transport_class_unregister(&ata_link_class); 819 out_unregister_transport: 820 return error; 821 822} 823 824void __exit libata_transport_exit(void) 825{ 826 transport_class_unregister(&ata_link_class); 827 transport_class_unregister(&ata_port_class); 828 transport_class_unregister(&ata_dev_class); 829} 830