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 2 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_NONE, "none" } 147}; 148ata_bitfield_name_search(class, ata_class_names) 149 150 151static struct { 152 u32 value; 153 char *name; 154} ata_err_names[] = { 155 { AC_ERR_DEV, "DeviceError" }, 156 { AC_ERR_HSM, "HostStateMachineError" }, 157 { AC_ERR_TIMEOUT, "Timeout" }, 158 { AC_ERR_MEDIA, "MediaError" }, 159 { AC_ERR_ATA_BUS, "BusError" }, 160 { AC_ERR_HOST_BUS, "HostBusError" }, 161 { AC_ERR_SYSTEM, "SystemError" }, 162 { AC_ERR_INVALID, "InvalidArg" }, 163 { AC_ERR_OTHER, "Unknown" }, 164 { AC_ERR_NODEV_HINT, "NoDeviceHint" }, 165 { AC_ERR_NCQ, "NCQError" } 166}; 167ata_bitfield_name_match(err, ata_err_names) 168 169static struct { 170 u32 value; 171 char *name; 172} ata_xfer_names[] = { 173 { XFER_UDMA_7, "XFER_UDMA_7" }, 174 { XFER_UDMA_6, "XFER_UDMA_6" }, 175 { XFER_UDMA_5, "XFER_UDMA_5" }, 176 { XFER_UDMA_4, "XFER_UDMA_4" }, 177 { XFER_UDMA_3, "XFER_UDMA_3" }, 178 { XFER_UDMA_2, "XFER_UDMA_2" }, 179 { XFER_UDMA_1, "XFER_UDMA_1" }, 180 { XFER_UDMA_0, "XFER_UDMA_0" }, 181 { XFER_MW_DMA_4, "XFER_MW_DMA_4" }, 182 { XFER_MW_DMA_3, "XFER_MW_DMA_3" }, 183 { XFER_MW_DMA_2, "XFER_MW_DMA_2" }, 184 { XFER_MW_DMA_1, "XFER_MW_DMA_1" }, 185 { XFER_MW_DMA_0, "XFER_MW_DMA_0" }, 186 { XFER_SW_DMA_2, "XFER_SW_DMA_2" }, 187 { XFER_SW_DMA_1, "XFER_SW_DMA_1" }, 188 { XFER_SW_DMA_0, "XFER_SW_DMA_0" }, 189 { XFER_PIO_6, "XFER_PIO_6" }, 190 { XFER_PIO_5, "XFER_PIO_5" }, 191 { XFER_PIO_4, "XFER_PIO_4" }, 192 { XFER_PIO_3, "XFER_PIO_3" }, 193 { XFER_PIO_2, "XFER_PIO_2" }, 194 { XFER_PIO_1, "XFER_PIO_1" }, 195 { XFER_PIO_0, "XFER_PIO_0" }, 196 { XFER_PIO_SLOW, "XFER_PIO_SLOW" } 197}; 198ata_bitfield_name_match(xfer,ata_xfer_names) 199 200/* 201 * ATA Port attributes 202 */ 203#define ata_port_show_simple(field, name, format_string, cast) \ 204static ssize_t \ 205show_ata_port_##name(struct device *dev, \ 206 struct device_attribute *attr, char *buf) \ 207{ \ 208 struct ata_port *ap = transport_class_to_port(dev); \ 209 \ 210 return snprintf(buf, 20, format_string, cast ap->field); \ 211} 212 213#define ata_port_simple_attr(field, name, format_string, type) \ 214 ata_port_show_simple(field, name, format_string, (type)) \ 215static DEVICE_ATTR(name, S_IRUGO, show_ata_port_##name, NULL) 216 217ata_port_simple_attr(nr_pmp_links, nr_pmp_links, "%d\n", int); 218ata_port_simple_attr(stats.idle_irq, idle_irq, "%ld\n", unsigned long); 219 220static DECLARE_TRANSPORT_CLASS(ata_port_class, 221 "ata_port", NULL, NULL, NULL); 222 223static void ata_tport_release(struct device *dev) 224{ 225 put_device(dev->parent); 226} 227 228/** 229 * ata_is_port -- check if a struct device represents a ATA port 230 * @dev: device to check 231 * 232 * Returns: 233 * %1 if the device represents a ATA Port, %0 else 234 */ 235int ata_is_port(const struct device *dev) 236{ 237 return dev->release == ata_tport_release; 238} 239 240static int ata_tport_match(struct attribute_container *cont, 241 struct device *dev) 242{ 243 if (!ata_is_port(dev)) 244 return 0; 245 return &ata_scsi_transport_template->host_attrs.ac == cont; 246} 247 248/** 249 * ata_tport_delete -- remove ATA PORT 250 * @port: ATA PORT to remove 251 * 252 * Removes the specified ATA PORT. Remove the associated link as well. 253 */ 254void ata_tport_delete(struct ata_port *ap) 255{ 256 struct device *dev = &ap->tdev; 257 258 ata_tlink_delete(&ap->link); 259 260 transport_remove_device(dev); 261 device_del(dev); 262 transport_destroy_device(dev); 263 put_device(dev); 264} 265 266/** ata_tport_add - initialize a transport ATA port structure 267 * 268 * @parent: parent device 269 * @ap: existing ata_port structure 270 * 271 * Initialize a ATA port structure for sysfs. It will be added to the device 272 * tree below the device specified by @parent which could be a PCI device. 273 * 274 * Returns %0 on success 275 */ 276int ata_tport_add(struct device *parent, 277 struct ata_port *ap) 278{ 279 int error; 280 struct device *dev = &ap->tdev; 281 282 device_initialize(dev); 283 dev->type = &ata_port_type; 284 285 dev->parent = get_device(parent); 286 dev->release = ata_tport_release; 287 dev_set_name(dev, "ata%d", ap->print_id); 288 transport_setup_device(dev); 289 error = device_add(dev); 290 if (error) { 291 goto tport_err; 292 } 293 294 device_enable_async_suspend(dev); 295 pm_runtime_set_active(dev); 296 pm_runtime_enable(dev); 297 298 transport_add_device(dev); 299 transport_configure_device(dev); 300 301 error = ata_tlink_add(&ap->link); 302 if (error) { 303 goto tport_link_err; 304 } 305 return 0; 306 307 tport_link_err: 308 transport_remove_device(dev); 309 device_del(dev); 310 311 tport_err: 312 transport_destroy_device(dev); 313 put_device(dev); 314 return error; 315} 316 317 318/* 319 * ATA link attributes 320 */ 321 322 323#define ata_link_show_linkspeed(field) \ 324static ssize_t \ 325show_ata_link_##field(struct device *dev, \ 326 struct device_attribute *attr, char *buf) \ 327{ \ 328 struct ata_link *link = transport_class_to_link(dev); \ 329 \ 330 return sprintf(buf,"%s\n", sata_spd_string(fls(link->field))); \ 331} 332 333#define ata_link_linkspeed_attr(field) \ 334 ata_link_show_linkspeed(field) \ 335static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL) 336 337ata_link_linkspeed_attr(hw_sata_spd_limit); 338ata_link_linkspeed_attr(sata_spd_limit); 339ata_link_linkspeed_attr(sata_spd); 340 341 342static DECLARE_TRANSPORT_CLASS(ata_link_class, 343 "ata_link", NULL, NULL, NULL); 344 345static void ata_tlink_release(struct device *dev) 346{ 347 put_device(dev->parent); 348} 349 350/** 351 * ata_is_link -- check if a struct device represents a ATA link 352 * @dev: device to check 353 * 354 * Returns: 355 * %1 if the device represents a ATA link, %0 else 356 */ 357int ata_is_link(const struct device *dev) 358{ 359 return dev->release == ata_tlink_release; 360} 361 362static int ata_tlink_match(struct attribute_container *cont, 363 struct device *dev) 364{ 365 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); 366 if (!ata_is_link(dev)) 367 return 0; 368 return &i->link_attr_cont.ac == cont; 369} 370 371/** 372 * ata_tlink_delete -- remove ATA LINK 373 * @port: ATA LINK to remove 374 * 375 * Removes the specified ATA LINK. remove associated ATA device(s) as well. 376 */ 377void ata_tlink_delete(struct ata_link *link) 378{ 379 struct device *dev = &link->tdev; 380 struct ata_device *ata_dev; 381 382 ata_for_each_dev(ata_dev, link, ALL) { 383 ata_tdev_delete(ata_dev); 384 } 385 386 transport_remove_device(dev); 387 device_del(dev); 388 transport_destroy_device(dev); 389 put_device(dev); 390} 391 392/** 393 * ata_tlink_add -- initialize a transport ATA link structure 394 * @link: allocated ata_link structure. 395 * 396 * Initialize an ATA LINK structure for sysfs. It will be added in the 397 * device tree below the ATA PORT it belongs to. 398 * 399 * Returns %0 on success 400 */ 401int ata_tlink_add(struct ata_link *link) 402{ 403 struct device *dev = &link->tdev; 404 struct ata_port *ap = link->ap; 405 struct ata_device *ata_dev; 406 int error; 407 408 device_initialize(dev); 409 dev->parent = get_device(&ap->tdev); 410 dev->release = ata_tlink_release; 411 if (ata_is_host_link(link)) 412 dev_set_name(dev, "link%d", ap->print_id); 413 else 414 dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp); 415 416 transport_setup_device(dev); 417 418 error = device_add(dev); 419 if (error) { 420 goto tlink_err; 421 } 422 423 transport_add_device(dev); 424 transport_configure_device(dev); 425 426 ata_for_each_dev(ata_dev, link, ALL) { 427 error = ata_tdev_add(ata_dev); 428 if (error) { 429 goto tlink_dev_err; 430 } 431 } 432 return 0; 433 tlink_dev_err: 434 while (--ata_dev >= link->device) { 435 ata_tdev_delete(ata_dev); 436 } 437 transport_remove_device(dev); 438 device_del(dev); 439 tlink_err: 440 transport_destroy_device(dev); 441 put_device(dev); 442 return error; 443} 444 445/* 446 * ATA device attributes 447 */ 448 449#define ata_dev_show_class(title, field) \ 450static ssize_t \ 451show_ata_dev_##field(struct device *dev, \ 452 struct device_attribute *attr, char *buf) \ 453{ \ 454 struct ata_device *ata_dev = transport_class_to_dev(dev); \ 455 \ 456 return get_ata_##title##_names(ata_dev->field, buf); \ 457} 458 459#define ata_dev_attr(title, field) \ 460 ata_dev_show_class(title, field) \ 461static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL) 462 463ata_dev_attr(class, class); 464ata_dev_attr(xfer, pio_mode); 465ata_dev_attr(xfer, dma_mode); 466ata_dev_attr(xfer, xfer_mode); 467 468 469#define ata_dev_show_simple(field, format_string, cast) \ 470static ssize_t \ 471show_ata_dev_##field(struct device *dev, \ 472 struct device_attribute *attr, char *buf) \ 473{ \ 474 struct ata_device *ata_dev = transport_class_to_dev(dev); \ 475 \ 476 return snprintf(buf, 20, format_string, cast ata_dev->field); \ 477} 478 479#define ata_dev_simple_attr(field, format_string, type) \ 480 ata_dev_show_simple(field, format_string, (type)) \ 481static DEVICE_ATTR(field, S_IRUGO, \ 482 show_ata_dev_##field, NULL) 483 484ata_dev_simple_attr(spdn_cnt, "%d\n", int); 485 486struct ata_show_ering_arg { 487 char* buf; 488 int written; 489}; 490 491static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg) 492{ 493 struct ata_show_ering_arg* arg = void_arg; 494 struct timespec time; 495 496 jiffies_to_timespec(ent->timestamp,&time); 497 arg->written += sprintf(arg->buf + arg->written, 498 "[%5lu.%06lu]", 499 time.tv_sec, time.tv_nsec); 500 arg->written += get_ata_err_names(ent->err_mask, 501 arg->buf + arg->written); 502 return 0; 503} 504 505static ssize_t 506show_ata_dev_ering(struct device *dev, 507 struct device_attribute *attr, char *buf) 508{ 509 struct ata_device *ata_dev = transport_class_to_dev(dev); 510 struct ata_show_ering_arg arg = { buf, 0 }; 511 512 ata_ering_map(&ata_dev->ering, ata_show_ering, &arg); 513 return arg.written; 514} 515 516 517static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL); 518 519static ssize_t 520show_ata_dev_id(struct device *dev, 521 struct device_attribute *attr, char *buf) 522{ 523 struct ata_device *ata_dev = transport_class_to_dev(dev); 524 int written = 0, i = 0; 525 526 if (ata_dev->class == ATA_DEV_PMP) 527 return 0; 528 for(i=0;i<ATA_ID_WORDS;i++) { 529 written += snprintf(buf+written, 20, "%04x%c", 530 ata_dev->id[i], 531 ((i+1) & 7) ? ' ' : '\n'); 532 } 533 return written; 534} 535 536static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL); 537 538static ssize_t 539show_ata_dev_gscr(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<SATA_PMP_GSCR_DWORDS;i++) { 548 written += snprintf(buf+written, 20, "%08x%c", 549 ata_dev->gscr[i], 550 ((i+1) & 3) ? ' ' : '\n'); 551 } 552 if (SATA_PMP_GSCR_DWORDS & 3) 553 buf[written-1] = '\n'; 554 return written; 555} 556 557static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL); 558 559static DECLARE_TRANSPORT_CLASS(ata_dev_class, 560 "ata_device", NULL, NULL, NULL); 561 562static void ata_tdev_release(struct device *dev) 563{ 564 put_device(dev->parent); 565} 566 567/** 568 * ata_is_ata_dev -- check if a struct device represents a ATA device 569 * @dev: device to check 570 * 571 * Returns: 572 * %1 if the device represents a ATA device, %0 else 573 */ 574int ata_is_ata_dev(const struct device *dev) 575{ 576 return dev->release == ata_tdev_release; 577} 578 579static int ata_tdev_match(struct attribute_container *cont, 580 struct device *dev) 581{ 582 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); 583 if (!ata_is_ata_dev(dev)) 584 return 0; 585 return &i->dev_attr_cont.ac == cont; 586} 587 588/** 589 * ata_tdev_free -- free a ATA LINK 590 * @dev: ATA PHY to free 591 * 592 * Frees the specified ATA PHY. 593 * 594 * Note: 595 * This function must only be called on a PHY that has not 596 * successfully been added using ata_tdev_add(). 597 */ 598static void ata_tdev_free(struct ata_device *dev) 599{ 600 transport_destroy_device(&dev->tdev); 601 put_device(&dev->tdev); 602} 603 604/** 605 * ata_tdev_delete -- remove ATA device 606 * @port: ATA PORT to remove 607 * 608 * Removes the specified ATA device. 609 */ 610static void ata_tdev_delete(struct ata_device *ata_dev) 611{ 612 struct device *dev = &ata_dev->tdev; 613 614 transport_remove_device(dev); 615 device_del(dev); 616 ata_tdev_free(ata_dev); 617} 618 619 620/** 621 * ata_tdev_add -- initialize a transport ATA device structure. 622 * @ata_dev: ata_dev structure. 623 * 624 * Initialize an ATA device structure for sysfs. It will be added in the 625 * device tree below the ATA LINK device it belongs to. 626 * 627 * Returns %0 on success 628 */ 629static int ata_tdev_add(struct ata_device *ata_dev) 630{ 631 struct device *dev = &ata_dev->tdev; 632 struct ata_link *link = ata_dev->link; 633 struct ata_port *ap = link->ap; 634 int error; 635 636 device_initialize(dev); 637 dev->parent = get_device(&link->tdev); 638 dev->release = ata_tdev_release; 639 if (ata_is_host_link(link)) 640 dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno); 641 else 642 dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp); 643 644 transport_setup_device(dev); 645 error = device_add(dev); 646 if (error) { 647 ata_tdev_free(ata_dev); 648 return error; 649 } 650 651 transport_add_device(dev); 652 transport_configure_device(dev); 653 return 0; 654} 655 656 657/* 658 * Setup / Teardown code 659 */ 660 661#define SETUP_TEMPLATE(attrb, field, perm, test) \ 662 i->private_##attrb[count] = dev_attr_##field; \ 663 i->private_##attrb[count].attr.mode = perm; \ 664 i->attrb[count] = &i->private_##attrb[count]; \ 665 if (test) \ 666 count++ 667 668#define SETUP_LINK_ATTRIBUTE(field) \ 669 SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1) 670 671#define SETUP_PORT_ATTRIBUTE(field) \ 672 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1) 673 674#define SETUP_DEV_ATTRIBUTE(field) \ 675 SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1) 676 677/** 678 * ata_attach_transport -- instantiate ATA transport template 679 */ 680struct scsi_transport_template *ata_attach_transport(void) 681{ 682 struct ata_internal *i; 683 int count; 684 685 i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL); 686 if (!i) 687 return NULL; 688 689 i->t.eh_strategy_handler = ata_scsi_error; 690 i->t.eh_timed_out = ata_scsi_timed_out; 691 i->t.user_scan = ata_scsi_user_scan; 692 693 i->t.host_attrs.ac.attrs = &i->port_attrs[0]; 694 i->t.host_attrs.ac.class = &ata_port_class.class; 695 i->t.host_attrs.ac.match = ata_tport_match; 696 transport_container_register(&i->t.host_attrs); 697 698 i->link_attr_cont.ac.class = &ata_link_class.class; 699 i->link_attr_cont.ac.attrs = &i->link_attrs[0]; 700 i->link_attr_cont.ac.match = ata_tlink_match; 701 transport_container_register(&i->link_attr_cont); 702 703 i->dev_attr_cont.ac.class = &ata_dev_class.class; 704 i->dev_attr_cont.ac.attrs = &i->dev_attrs[0]; 705 i->dev_attr_cont.ac.match = ata_tdev_match; 706 transport_container_register(&i->dev_attr_cont); 707 708 count = 0; 709 SETUP_PORT_ATTRIBUTE(nr_pmp_links); 710 SETUP_PORT_ATTRIBUTE(idle_irq); 711 BUG_ON(count > ATA_PORT_ATTRS); 712 i->port_attrs[count] = NULL; 713 714 count = 0; 715 SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit); 716 SETUP_LINK_ATTRIBUTE(sata_spd_limit); 717 SETUP_LINK_ATTRIBUTE(sata_spd); 718 BUG_ON(count > ATA_LINK_ATTRS); 719 i->link_attrs[count] = NULL; 720 721 count = 0; 722 SETUP_DEV_ATTRIBUTE(class); 723 SETUP_DEV_ATTRIBUTE(pio_mode); 724 SETUP_DEV_ATTRIBUTE(dma_mode); 725 SETUP_DEV_ATTRIBUTE(xfer_mode); 726 SETUP_DEV_ATTRIBUTE(spdn_cnt); 727 SETUP_DEV_ATTRIBUTE(ering); 728 SETUP_DEV_ATTRIBUTE(id); 729 SETUP_DEV_ATTRIBUTE(gscr); 730 BUG_ON(count > ATA_DEV_ATTRS); 731 i->dev_attrs[count] = NULL; 732 733 return &i->t; 734} 735 736/** 737 * ata_release_transport -- release ATA transport template instance 738 * @t: transport template instance 739 */ 740void ata_release_transport(struct scsi_transport_template *t) 741{ 742 struct ata_internal *i = to_ata_internal(t); 743 744 transport_container_unregister(&i->t.host_attrs); 745 transport_container_unregister(&i->link_attr_cont); 746 transport_container_unregister(&i->dev_attr_cont); 747 748 kfree(i); 749} 750 751__init int libata_transport_init(void) 752{ 753 int error; 754 755 error = transport_class_register(&ata_link_class); 756 if (error) 757 goto out_unregister_transport; 758 error = transport_class_register(&ata_port_class); 759 if (error) 760 goto out_unregister_link; 761 error = transport_class_register(&ata_dev_class); 762 if (error) 763 goto out_unregister_port; 764 return 0; 765 766 out_unregister_port: 767 transport_class_unregister(&ata_port_class); 768 out_unregister_link: 769 transport_class_unregister(&ata_link_class); 770 out_unregister_transport: 771 return error; 772 773} 774 775void __exit libata_transport_exit(void) 776{ 777 transport_class_unregister(&ata_link_class); 778 transport_class_unregister(&ata_port_class); 779 transport_class_unregister(&ata_dev_class); 780} 781