1/* 2 * Copyright 2008 ioogle, Inc. All rights reserved. 3 * Released under GPL v2. 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_match(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 snprintf(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 put_device(dev->parent); 228} 229 230/** 231 * ata_is_port -- check if a struct device represents a ATA port 232 * @dev: device to check 233 * 234 * Returns: 235 * %1 if the device represents a ATA Port, %0 else 236 */ 237static int ata_is_port(const struct device *dev) 238{ 239 return dev->release == ata_tport_release; 240} 241 242static int ata_tport_match(struct attribute_container *cont, 243 struct device *dev) 244{ 245 if (!ata_is_port(dev)) 246 return 0; 247 return &ata_scsi_transport_template->host_attrs.ac == cont; 248} 249 250/** 251 * ata_tport_delete -- remove ATA PORT 252 * @port: ATA PORT to remove 253 * 254 * Removes the specified ATA PORT. Remove the associated link as well. 255 */ 256void ata_tport_delete(struct ata_port *ap) 257{ 258 struct device *dev = &ap->tdev; 259 260 ata_tlink_delete(&ap->link); 261 262 transport_remove_device(dev); 263 device_del(dev); 264 transport_destroy_device(dev); 265 put_device(dev); 266} 267 268/** ata_tport_add - initialize a transport ATA port structure 269 * 270 * @parent: parent device 271 * @ap: existing ata_port structure 272 * 273 * Initialize a ATA port structure for sysfs. It will be added to the device 274 * tree below the device specified by @parent which could be a PCI device. 275 * 276 * Returns %0 on success 277 */ 278int ata_tport_add(struct device *parent, 279 struct ata_port *ap) 280{ 281 int error; 282 struct device *dev = &ap->tdev; 283 284 device_initialize(dev); 285 dev->type = &ata_port_type; 286 287 dev->parent = get_device(parent); 288 dev->release = ata_tport_release; 289 dev_set_name(dev, "ata%d", ap->print_id); 290 transport_setup_device(dev); 291 ata_acpi_bind_port(ap); 292 error = device_add(dev); 293 if (error) { 294 goto tport_err; 295 } 296 297 device_enable_async_suspend(dev); 298 pm_runtime_set_active(dev); 299 pm_runtime_enable(dev); 300 pm_runtime_forbid(dev); 301 302 transport_add_device(dev); 303 transport_configure_device(dev); 304 305 error = ata_tlink_add(&ap->link); 306 if (error) { 307 goto tport_link_err; 308 } 309 return 0; 310 311 tport_link_err: 312 transport_remove_device(dev); 313 device_del(dev); 314 315 tport_err: 316 transport_destroy_device(dev); 317 put_device(dev); 318 return error; 319} 320 321 322/* 323 * ATA link attributes 324 */ 325static int noop(int x) { return x; } 326 327#define ata_link_show_linkspeed(field, format) \ 328static ssize_t \ 329show_ata_link_##field(struct device *dev, \ 330 struct device_attribute *attr, char *buf) \ 331{ \ 332 struct ata_link *link = transport_class_to_link(dev); \ 333 \ 334 return sprintf(buf, "%s\n", sata_spd_string(format(link->field))); \ 335} 336 337#define ata_link_linkspeed_attr(field, format) \ 338 ata_link_show_linkspeed(field, format) \ 339static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL) 340 341ata_link_linkspeed_attr(hw_sata_spd_limit, fls); 342ata_link_linkspeed_attr(sata_spd_limit, fls); 343ata_link_linkspeed_attr(sata_spd, noop); 344 345 346static DECLARE_TRANSPORT_CLASS(ata_link_class, 347 "ata_link", NULL, NULL, NULL); 348 349static void ata_tlink_release(struct device *dev) 350{ 351 put_device(dev->parent); 352} 353 354/** 355 * ata_is_link -- check if a struct device represents a ATA link 356 * @dev: device to check 357 * 358 * Returns: 359 * %1 if the device represents a ATA link, %0 else 360 */ 361static int ata_is_link(const struct device *dev) 362{ 363 return dev->release == ata_tlink_release; 364} 365 366static int ata_tlink_match(struct attribute_container *cont, 367 struct device *dev) 368{ 369 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); 370 if (!ata_is_link(dev)) 371 return 0; 372 return &i->link_attr_cont.ac == cont; 373} 374 375/** 376 * ata_tlink_delete -- remove ATA LINK 377 * @port: ATA LINK to remove 378 * 379 * Removes the specified ATA LINK. remove associated ATA device(s) as well. 380 */ 381void ata_tlink_delete(struct ata_link *link) 382{ 383 struct device *dev = &link->tdev; 384 struct ata_device *ata_dev; 385 386 ata_for_each_dev(ata_dev, link, ALL) { 387 ata_tdev_delete(ata_dev); 388 } 389 390 transport_remove_device(dev); 391 device_del(dev); 392 transport_destroy_device(dev); 393 put_device(dev); 394} 395 396/** 397 * ata_tlink_add -- initialize a transport ATA link structure 398 * @link: allocated ata_link structure. 399 * 400 * Initialize an ATA LINK structure for sysfs. It will be added in the 401 * device tree below the ATA PORT it belongs to. 402 * 403 * Returns %0 on success 404 */ 405int ata_tlink_add(struct ata_link *link) 406{ 407 struct device *dev = &link->tdev; 408 struct ata_port *ap = link->ap; 409 struct ata_device *ata_dev; 410 int error; 411 412 device_initialize(dev); 413 dev->parent = get_device(&ap->tdev); 414 dev->release = ata_tlink_release; 415 if (ata_is_host_link(link)) 416 dev_set_name(dev, "link%d", ap->print_id); 417 else 418 dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp); 419 420 transport_setup_device(dev); 421 422 error = device_add(dev); 423 if (error) { 424 goto tlink_err; 425 } 426 427 transport_add_device(dev); 428 transport_configure_device(dev); 429 430 ata_for_each_dev(ata_dev, link, ALL) { 431 error = ata_tdev_add(ata_dev); 432 if (error) { 433 goto tlink_dev_err; 434 } 435 } 436 return 0; 437 tlink_dev_err: 438 while (--ata_dev >= link->device) { 439 ata_tdev_delete(ata_dev); 440 } 441 transport_remove_device(dev); 442 device_del(dev); 443 tlink_err: 444 transport_destroy_device(dev); 445 put_device(dev); 446 return error; 447} 448 449/* 450 * ATA device attributes 451 */ 452 453#define ata_dev_show_class(title, field) \ 454static ssize_t \ 455show_ata_dev_##field(struct device *dev, \ 456 struct device_attribute *attr, char *buf) \ 457{ \ 458 struct ata_device *ata_dev = transport_class_to_dev(dev); \ 459 \ 460 return get_ata_##title##_names(ata_dev->field, buf); \ 461} 462 463#define ata_dev_attr(title, field) \ 464 ata_dev_show_class(title, field) \ 465static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL) 466 467ata_dev_attr(class, class); 468ata_dev_attr(xfer, pio_mode); 469ata_dev_attr(xfer, dma_mode); 470ata_dev_attr(xfer, xfer_mode); 471 472 473#define ata_dev_show_simple(field, format_string, cast) \ 474static ssize_t \ 475show_ata_dev_##field(struct device *dev, \ 476 struct device_attribute *attr, char *buf) \ 477{ \ 478 struct ata_device *ata_dev = transport_class_to_dev(dev); \ 479 \ 480 return snprintf(buf, 20, format_string, cast ata_dev->field); \ 481} 482 483#define ata_dev_simple_attr(field, format_string, type) \ 484 ata_dev_show_simple(field, format_string, (type)) \ 485static DEVICE_ATTR(field, S_IRUGO, \ 486 show_ata_dev_##field, NULL) 487 488ata_dev_simple_attr(spdn_cnt, "%d\n", int); 489 490struct ata_show_ering_arg { 491 char* buf; 492 int written; 493}; 494 495static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg) 496{ 497 struct ata_show_ering_arg* arg = void_arg; 498 struct timespec time; 499 500 jiffies_to_timespec(ent->timestamp,&time); 501 arg->written += sprintf(arg->buf + arg->written, 502 "[%5lu.%06lu]", 503 time.tv_sec, time.tv_nsec); 504 arg->written += get_ata_err_names(ent->err_mask, 505 arg->buf + arg->written); 506 return 0; 507} 508 509static ssize_t 510show_ata_dev_ering(struct device *dev, 511 struct device_attribute *attr, char *buf) 512{ 513 struct ata_device *ata_dev = transport_class_to_dev(dev); 514 struct ata_show_ering_arg arg = { buf, 0 }; 515 516 ata_ering_map(&ata_dev->ering, ata_show_ering, &arg); 517 return arg.written; 518} 519 520 521static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL); 522 523static ssize_t 524show_ata_dev_id(struct device *dev, 525 struct device_attribute *attr, char *buf) 526{ 527 struct ata_device *ata_dev = transport_class_to_dev(dev); 528 int written = 0, i = 0; 529 530 if (ata_dev->class == ATA_DEV_PMP) 531 return 0; 532 for(i=0;i<ATA_ID_WORDS;i++) { 533 written += snprintf(buf+written, 20, "%04x%c", 534 ata_dev->id[i], 535 ((i+1) & 7) ? ' ' : '\n'); 536 } 537 return written; 538} 539 540static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL); 541 542static ssize_t 543show_ata_dev_gscr(struct device *dev, 544 struct device_attribute *attr, char *buf) 545{ 546 struct ata_device *ata_dev = transport_class_to_dev(dev); 547 int written = 0, i = 0; 548 549 if (ata_dev->class != ATA_DEV_PMP) 550 return 0; 551 for(i=0;i<SATA_PMP_GSCR_DWORDS;i++) { 552 written += snprintf(buf+written, 20, "%08x%c", 553 ata_dev->gscr[i], 554 ((i+1) & 3) ? ' ' : '\n'); 555 } 556 if (SATA_PMP_GSCR_DWORDS & 3) 557 buf[written-1] = '\n'; 558 return written; 559} 560 561static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL); 562 563static ssize_t 564show_ata_dev_trim(struct device *dev, 565 struct device_attribute *attr, char *buf) 566{ 567 struct ata_device *ata_dev = transport_class_to_dev(dev); 568 unsigned char *mode; 569 570 if (!ata_id_has_trim(ata_dev->id)) 571 mode = "unsupported"; 572 else if (ata_dev->horkage & ATA_HORKAGE_NOTRIM) 573 mode = "forced_unsupported"; 574 else if (ata_dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) 575 mode = "forced_unqueued"; 576 else if (ata_fpdma_dsm_supported(ata_dev)) 577 mode = "queued"; 578 else 579 mode = "unqueued"; 580 581 return snprintf(buf, 20, "%s\n", mode); 582} 583 584static DEVICE_ATTR(trim, S_IRUGO, show_ata_dev_trim, NULL); 585 586static DECLARE_TRANSPORT_CLASS(ata_dev_class, 587 "ata_device", NULL, NULL, NULL); 588 589static void ata_tdev_release(struct device *dev) 590{ 591 put_device(dev->parent); 592} 593 594/** 595 * ata_is_ata_dev -- check if a struct device represents a ATA device 596 * @dev: device to check 597 * 598 * Returns: 599 * %1 if the device represents a ATA device, %0 else 600 */ 601static int ata_is_ata_dev(const struct device *dev) 602{ 603 return dev->release == ata_tdev_release; 604} 605 606static int ata_tdev_match(struct attribute_container *cont, 607 struct device *dev) 608{ 609 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); 610 if (!ata_is_ata_dev(dev)) 611 return 0; 612 return &i->dev_attr_cont.ac == cont; 613} 614 615/** 616 * ata_tdev_free -- free a ATA LINK 617 * @dev: ATA PHY to free 618 * 619 * Frees the specified ATA PHY. 620 * 621 * Note: 622 * This function must only be called on a PHY that has not 623 * successfully been added using ata_tdev_add(). 624 */ 625static void ata_tdev_free(struct ata_device *dev) 626{ 627 transport_destroy_device(&dev->tdev); 628 put_device(&dev->tdev); 629} 630 631/** 632 * ata_tdev_delete -- remove ATA device 633 * @port: ATA PORT to remove 634 * 635 * Removes the specified ATA device. 636 */ 637static void ata_tdev_delete(struct ata_device *ata_dev) 638{ 639 struct device *dev = &ata_dev->tdev; 640 641 transport_remove_device(dev); 642 device_del(dev); 643 ata_tdev_free(ata_dev); 644} 645 646 647/** 648 * ata_tdev_add -- initialize a transport ATA device structure. 649 * @ata_dev: ata_dev structure. 650 * 651 * Initialize an ATA device structure for sysfs. It will be added in the 652 * device tree below the ATA LINK device it belongs to. 653 * 654 * Returns %0 on success 655 */ 656static int ata_tdev_add(struct ata_device *ata_dev) 657{ 658 struct device *dev = &ata_dev->tdev; 659 struct ata_link *link = ata_dev->link; 660 struct ata_port *ap = link->ap; 661 int error; 662 663 device_initialize(dev); 664 dev->parent = get_device(&link->tdev); 665 dev->release = ata_tdev_release; 666 if (ata_is_host_link(link)) 667 dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno); 668 else 669 dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp); 670 671 transport_setup_device(dev); 672 ata_acpi_bind_dev(ata_dev); 673 error = device_add(dev); 674 if (error) { 675 ata_tdev_free(ata_dev); 676 return error; 677 } 678 679 transport_add_device(dev); 680 transport_configure_device(dev); 681 return 0; 682} 683 684 685/* 686 * Setup / Teardown code 687 */ 688 689#define SETUP_TEMPLATE(attrb, field, perm, test) \ 690 i->private_##attrb[count] = dev_attr_##field; \ 691 i->private_##attrb[count].attr.mode = perm; \ 692 i->attrb[count] = &i->private_##attrb[count]; \ 693 if (test) \ 694 count++ 695 696#define SETUP_LINK_ATTRIBUTE(field) \ 697 SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1) 698 699#define SETUP_PORT_ATTRIBUTE(field) \ 700 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1) 701 702#define SETUP_DEV_ATTRIBUTE(field) \ 703 SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1) 704 705/** 706 * ata_attach_transport -- instantiate ATA transport template 707 */ 708struct scsi_transport_template *ata_attach_transport(void) 709{ 710 struct ata_internal *i; 711 int count; 712 713 i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL); 714 if (!i) 715 return NULL; 716 717 i->t.eh_strategy_handler = ata_scsi_error; 718 i->t.eh_timed_out = ata_scsi_timed_out; 719 i->t.user_scan = ata_scsi_user_scan; 720 721 i->t.host_attrs.ac.attrs = &i->port_attrs[0]; 722 i->t.host_attrs.ac.class = &ata_port_class.class; 723 i->t.host_attrs.ac.match = ata_tport_match; 724 transport_container_register(&i->t.host_attrs); 725 726 i->link_attr_cont.ac.class = &ata_link_class.class; 727 i->link_attr_cont.ac.attrs = &i->link_attrs[0]; 728 i->link_attr_cont.ac.match = ata_tlink_match; 729 transport_container_register(&i->link_attr_cont); 730 731 i->dev_attr_cont.ac.class = &ata_dev_class.class; 732 i->dev_attr_cont.ac.attrs = &i->dev_attrs[0]; 733 i->dev_attr_cont.ac.match = ata_tdev_match; 734 transport_container_register(&i->dev_attr_cont); 735 736 count = 0; 737 SETUP_PORT_ATTRIBUTE(nr_pmp_links); 738 SETUP_PORT_ATTRIBUTE(idle_irq); 739 SETUP_PORT_ATTRIBUTE(port_no); 740 BUG_ON(count > ATA_PORT_ATTRS); 741 i->port_attrs[count] = NULL; 742 743 count = 0; 744 SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit); 745 SETUP_LINK_ATTRIBUTE(sata_spd_limit); 746 SETUP_LINK_ATTRIBUTE(sata_spd); 747 BUG_ON(count > ATA_LINK_ATTRS); 748 i->link_attrs[count] = NULL; 749 750 count = 0; 751 SETUP_DEV_ATTRIBUTE(class); 752 SETUP_DEV_ATTRIBUTE(pio_mode); 753 SETUP_DEV_ATTRIBUTE(dma_mode); 754 SETUP_DEV_ATTRIBUTE(xfer_mode); 755 SETUP_DEV_ATTRIBUTE(spdn_cnt); 756 SETUP_DEV_ATTRIBUTE(ering); 757 SETUP_DEV_ATTRIBUTE(id); 758 SETUP_DEV_ATTRIBUTE(gscr); 759 SETUP_DEV_ATTRIBUTE(trim); 760 BUG_ON(count > ATA_DEV_ATTRS); 761 i->dev_attrs[count] = NULL; 762 763 return &i->t; 764} 765 766/** 767 * ata_release_transport -- release ATA transport template instance 768 * @t: transport template instance 769 */ 770void ata_release_transport(struct scsi_transport_template *t) 771{ 772 struct ata_internal *i = to_ata_internal(t); 773 774 transport_container_unregister(&i->t.host_attrs); 775 transport_container_unregister(&i->link_attr_cont); 776 transport_container_unregister(&i->dev_attr_cont); 777 778 kfree(i); 779} 780 781__init int libata_transport_init(void) 782{ 783 int error; 784 785 error = transport_class_register(&ata_link_class); 786 if (error) 787 goto out_unregister_transport; 788 error = transport_class_register(&ata_port_class); 789 if (error) 790 goto out_unregister_link; 791 error = transport_class_register(&ata_dev_class); 792 if (error) 793 goto out_unregister_port; 794 return 0; 795 796 out_unregister_port: 797 transport_class_unregister(&ata_port_class); 798 out_unregister_link: 799 transport_class_unregister(&ata_link_class); 800 out_unregister_transport: 801 return error; 802 803} 804 805void __exit libata_transport_exit(void) 806{ 807 transport_class_unregister(&ata_link_class); 808 transport_class_unregister(&ata_port_class); 809 transport_class_unregister(&ata_dev_class); 810} 811