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 44 struct scsi_transport_template; 45 struct scsi_transport_template *ata_scsi_transport_template; 46 47 struct 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 */ 85 static int ata_tdev_add(struct ata_device *dev); 86 static 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) \ 97 static ssize_t \ 98 get_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) \ 116 static ssize_t \ 117 get_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 } 132 133 static 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 }; 148 ata_bitfield_name_search(class, ata_class_names) 149 150 151 static 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 }; 167 ata_bitfield_name_match(err, ata_err_names) 168 169 static 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 }; 198 ata_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) \ 204 static ssize_t \ 205 show_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)) \ 215 static DEVICE_ATTR(name, S_IRUGO, show_ata_port_##name, NULL) 216 217 ata_port_simple_attr(nr_pmp_links, nr_pmp_links, "%d\n", int); 218 ata_port_simple_attr(stats.idle_irq, idle_irq, "%ld\n", unsigned long); 219 220 static DECLARE_TRANSPORT_CLASS(ata_port_class, 221 "ata_port", NULL, NULL, NULL); 222 223 static 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 */ 235 static int ata_is_port(const struct device *dev) 236 { 237 return dev->release == ata_tport_release; 238 } 239 240 static 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 */ 254 void 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 */ 276 int 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 pm_runtime_forbid(dev); 298 299 transport_add_device(dev); 300 transport_configure_device(dev); 301 302 error = ata_tlink_add(&ap->link); 303 if (error) { 304 goto tport_link_err; 305 } 306 return 0; 307 308 tport_link_err: 309 transport_remove_device(dev); 310 device_del(dev); 311 312 tport_err: 313 transport_destroy_device(dev); 314 put_device(dev); 315 return error; 316 } 317 318 319 /* 320 * ATA link attributes 321 */ 322 323 324 #define ata_link_show_linkspeed(field) \ 325 static ssize_t \ 326 show_ata_link_##field(struct device *dev, \ 327 struct device_attribute *attr, char *buf) \ 328 { \ 329 struct ata_link *link = transport_class_to_link(dev); \ 330 \ 331 return sprintf(buf,"%s\n", sata_spd_string(fls(link->field))); \ 332 } 333 334 #define ata_link_linkspeed_attr(field) \ 335 ata_link_show_linkspeed(field) \ 336 static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL) 337 338 ata_link_linkspeed_attr(hw_sata_spd_limit); 339 ata_link_linkspeed_attr(sata_spd_limit); 340 ata_link_linkspeed_attr(sata_spd); 341 342 343 static DECLARE_TRANSPORT_CLASS(ata_link_class, 344 "ata_link", NULL, NULL, NULL); 345 346 static void ata_tlink_release(struct device *dev) 347 { 348 put_device(dev->parent); 349 } 350 351 /** 352 * ata_is_link -- check if a struct device represents a ATA link 353 * @dev: device to check 354 * 355 * Returns: 356 * %1 if the device represents a ATA link, %0 else 357 */ 358 static int ata_is_link(const struct device *dev) 359 { 360 return dev->release == ata_tlink_release; 361 } 362 363 static int ata_tlink_match(struct attribute_container *cont, 364 struct device *dev) 365 { 366 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); 367 if (!ata_is_link(dev)) 368 return 0; 369 return &i->link_attr_cont.ac == cont; 370 } 371 372 /** 373 * ata_tlink_delete -- remove ATA LINK 374 * @port: ATA LINK to remove 375 * 376 * Removes the specified ATA LINK. remove associated ATA device(s) as well. 377 */ 378 void ata_tlink_delete(struct ata_link *link) 379 { 380 struct device *dev = &link->tdev; 381 struct ata_device *ata_dev; 382 383 ata_for_each_dev(ata_dev, link, ALL) { 384 ata_tdev_delete(ata_dev); 385 } 386 387 transport_remove_device(dev); 388 device_del(dev); 389 transport_destroy_device(dev); 390 put_device(dev); 391 } 392 393 /** 394 * ata_tlink_add -- initialize a transport ATA link structure 395 * @link: allocated ata_link structure. 396 * 397 * Initialize an ATA LINK structure for sysfs. It will be added in the 398 * device tree below the ATA PORT it belongs to. 399 * 400 * Returns %0 on success 401 */ 402 int ata_tlink_add(struct ata_link *link) 403 { 404 struct device *dev = &link->tdev; 405 struct ata_port *ap = link->ap; 406 struct ata_device *ata_dev; 407 int error; 408 409 device_initialize(dev); 410 dev->parent = get_device(&ap->tdev); 411 dev->release = ata_tlink_release; 412 if (ata_is_host_link(link)) 413 dev_set_name(dev, "link%d", ap->print_id); 414 else 415 dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp); 416 417 transport_setup_device(dev); 418 419 error = device_add(dev); 420 if (error) { 421 goto tlink_err; 422 } 423 424 transport_add_device(dev); 425 transport_configure_device(dev); 426 427 ata_for_each_dev(ata_dev, link, ALL) { 428 error = ata_tdev_add(ata_dev); 429 if (error) { 430 goto tlink_dev_err; 431 } 432 } 433 return 0; 434 tlink_dev_err: 435 while (--ata_dev >= link->device) { 436 ata_tdev_delete(ata_dev); 437 } 438 transport_remove_device(dev); 439 device_del(dev); 440 tlink_err: 441 transport_destroy_device(dev); 442 put_device(dev); 443 return error; 444 } 445 446 /* 447 * ATA device attributes 448 */ 449 450 #define ata_dev_show_class(title, field) \ 451 static ssize_t \ 452 show_ata_dev_##field(struct device *dev, \ 453 struct device_attribute *attr, char *buf) \ 454 { \ 455 struct ata_device *ata_dev = transport_class_to_dev(dev); \ 456 \ 457 return get_ata_##title##_names(ata_dev->field, buf); \ 458 } 459 460 #define ata_dev_attr(title, field) \ 461 ata_dev_show_class(title, field) \ 462 static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL) 463 464 ata_dev_attr(class, class); 465 ata_dev_attr(xfer, pio_mode); 466 ata_dev_attr(xfer, dma_mode); 467 ata_dev_attr(xfer, xfer_mode); 468 469 470 #define ata_dev_show_simple(field, format_string, cast) \ 471 static ssize_t \ 472 show_ata_dev_##field(struct device *dev, \ 473 struct device_attribute *attr, char *buf) \ 474 { \ 475 struct ata_device *ata_dev = transport_class_to_dev(dev); \ 476 \ 477 return snprintf(buf, 20, format_string, cast ata_dev->field); \ 478 } 479 480 #define ata_dev_simple_attr(field, format_string, type) \ 481 ata_dev_show_simple(field, format_string, (type)) \ 482 static DEVICE_ATTR(field, S_IRUGO, \ 483 show_ata_dev_##field, NULL) 484 485 ata_dev_simple_attr(spdn_cnt, "%d\n", int); 486 487 struct ata_show_ering_arg { 488 char* buf; 489 int written; 490 }; 491 492 static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg) 493 { 494 struct ata_show_ering_arg* arg = void_arg; 495 struct timespec time; 496 497 jiffies_to_timespec(ent->timestamp,&time); 498 arg->written += sprintf(arg->buf + arg->written, 499 "[%5lu.%06lu]", 500 time.tv_sec, time.tv_nsec); 501 arg->written += get_ata_err_names(ent->err_mask, 502 arg->buf + arg->written); 503 return 0; 504 } 505 506 static ssize_t 507 show_ata_dev_ering(struct device *dev, 508 struct device_attribute *attr, char *buf) 509 { 510 struct ata_device *ata_dev = transport_class_to_dev(dev); 511 struct ata_show_ering_arg arg = { buf, 0 }; 512 513 ata_ering_map(&ata_dev->ering, ata_show_ering, &arg); 514 return arg.written; 515 } 516 517 518 static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL); 519 520 static ssize_t 521 show_ata_dev_id(struct device *dev, 522 struct device_attribute *attr, char *buf) 523 { 524 struct ata_device *ata_dev = transport_class_to_dev(dev); 525 int written = 0, i = 0; 526 527 if (ata_dev->class == ATA_DEV_PMP) 528 return 0; 529 for(i=0;i<ATA_ID_WORDS;i++) { 530 written += snprintf(buf+written, 20, "%04x%c", 531 ata_dev->id[i], 532 ((i+1) & 7) ? ' ' : '\n'); 533 } 534 return written; 535 } 536 537 static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL); 538 539 static ssize_t 540 show_ata_dev_gscr(struct device *dev, 541 struct device_attribute *attr, char *buf) 542 { 543 struct ata_device *ata_dev = transport_class_to_dev(dev); 544 int written = 0, i = 0; 545 546 if (ata_dev->class != ATA_DEV_PMP) 547 return 0; 548 for(i=0;i<SATA_PMP_GSCR_DWORDS;i++) { 549 written += snprintf(buf+written, 20, "%08x%c", 550 ata_dev->gscr[i], 551 ((i+1) & 3) ? ' ' : '\n'); 552 } 553 if (SATA_PMP_GSCR_DWORDS & 3) 554 buf[written-1] = '\n'; 555 return written; 556 } 557 558 static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL); 559 560 static DECLARE_TRANSPORT_CLASS(ata_dev_class, 561 "ata_device", NULL, NULL, NULL); 562 563 static void ata_tdev_release(struct device *dev) 564 { 565 put_device(dev->parent); 566 } 567 568 /** 569 * ata_is_ata_dev -- check if a struct device represents a ATA device 570 * @dev: device to check 571 * 572 * Returns: 573 * %1 if the device represents a ATA device, %0 else 574 */ 575 static int ata_is_ata_dev(const struct device *dev) 576 { 577 return dev->release == ata_tdev_release; 578 } 579 580 static int ata_tdev_match(struct attribute_container *cont, 581 struct device *dev) 582 { 583 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); 584 if (!ata_is_ata_dev(dev)) 585 return 0; 586 return &i->dev_attr_cont.ac == cont; 587 } 588 589 /** 590 * ata_tdev_free -- free a ATA LINK 591 * @dev: ATA PHY to free 592 * 593 * Frees the specified ATA PHY. 594 * 595 * Note: 596 * This function must only be called on a PHY that has not 597 * successfully been added using ata_tdev_add(). 598 */ 599 static void ata_tdev_free(struct ata_device *dev) 600 { 601 transport_destroy_device(&dev->tdev); 602 put_device(&dev->tdev); 603 } 604 605 /** 606 * ata_tdev_delete -- remove ATA device 607 * @port: ATA PORT to remove 608 * 609 * Removes the specified ATA device. 610 */ 611 static void ata_tdev_delete(struct ata_device *ata_dev) 612 { 613 struct device *dev = &ata_dev->tdev; 614 615 transport_remove_device(dev); 616 device_del(dev); 617 ata_tdev_free(ata_dev); 618 } 619 620 621 /** 622 * ata_tdev_add -- initialize a transport ATA device structure. 623 * @ata_dev: ata_dev structure. 624 * 625 * Initialize an ATA device structure for sysfs. It will be added in the 626 * device tree below the ATA LINK device it belongs to. 627 * 628 * Returns %0 on success 629 */ 630 static int ata_tdev_add(struct ata_device *ata_dev) 631 { 632 struct device *dev = &ata_dev->tdev; 633 struct ata_link *link = ata_dev->link; 634 struct ata_port *ap = link->ap; 635 int error; 636 637 device_initialize(dev); 638 dev->parent = get_device(&link->tdev); 639 dev->release = ata_tdev_release; 640 if (ata_is_host_link(link)) 641 dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno); 642 else 643 dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp); 644 645 transport_setup_device(dev); 646 error = device_add(dev); 647 if (error) { 648 ata_tdev_free(ata_dev); 649 return error; 650 } 651 652 transport_add_device(dev); 653 transport_configure_device(dev); 654 return 0; 655 } 656 657 658 /* 659 * Setup / Teardown code 660 */ 661 662 #define SETUP_TEMPLATE(attrb, field, perm, test) \ 663 i->private_##attrb[count] = dev_attr_##field; \ 664 i->private_##attrb[count].attr.mode = perm; \ 665 i->attrb[count] = &i->private_##attrb[count]; \ 666 if (test) \ 667 count++ 668 669 #define SETUP_LINK_ATTRIBUTE(field) \ 670 SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1) 671 672 #define SETUP_PORT_ATTRIBUTE(field) \ 673 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1) 674 675 #define SETUP_DEV_ATTRIBUTE(field) \ 676 SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1) 677 678 /** 679 * ata_attach_transport -- instantiate ATA transport template 680 */ 681 struct scsi_transport_template *ata_attach_transport(void) 682 { 683 struct ata_internal *i; 684 int count; 685 686 i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL); 687 if (!i) 688 return NULL; 689 690 i->t.eh_strategy_handler = ata_scsi_error; 691 i->t.eh_timed_out = ata_scsi_timed_out; 692 i->t.user_scan = ata_scsi_user_scan; 693 694 i->t.host_attrs.ac.attrs = &i->port_attrs[0]; 695 i->t.host_attrs.ac.class = &ata_port_class.class; 696 i->t.host_attrs.ac.match = ata_tport_match; 697 transport_container_register(&i->t.host_attrs); 698 699 i->link_attr_cont.ac.class = &ata_link_class.class; 700 i->link_attr_cont.ac.attrs = &i->link_attrs[0]; 701 i->link_attr_cont.ac.match = ata_tlink_match; 702 transport_container_register(&i->link_attr_cont); 703 704 i->dev_attr_cont.ac.class = &ata_dev_class.class; 705 i->dev_attr_cont.ac.attrs = &i->dev_attrs[0]; 706 i->dev_attr_cont.ac.match = ata_tdev_match; 707 transport_container_register(&i->dev_attr_cont); 708 709 count = 0; 710 SETUP_PORT_ATTRIBUTE(nr_pmp_links); 711 SETUP_PORT_ATTRIBUTE(idle_irq); 712 BUG_ON(count > ATA_PORT_ATTRS); 713 i->port_attrs[count] = NULL; 714 715 count = 0; 716 SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit); 717 SETUP_LINK_ATTRIBUTE(sata_spd_limit); 718 SETUP_LINK_ATTRIBUTE(sata_spd); 719 BUG_ON(count > ATA_LINK_ATTRS); 720 i->link_attrs[count] = NULL; 721 722 count = 0; 723 SETUP_DEV_ATTRIBUTE(class); 724 SETUP_DEV_ATTRIBUTE(pio_mode); 725 SETUP_DEV_ATTRIBUTE(dma_mode); 726 SETUP_DEV_ATTRIBUTE(xfer_mode); 727 SETUP_DEV_ATTRIBUTE(spdn_cnt); 728 SETUP_DEV_ATTRIBUTE(ering); 729 SETUP_DEV_ATTRIBUTE(id); 730 SETUP_DEV_ATTRIBUTE(gscr); 731 BUG_ON(count > ATA_DEV_ATTRS); 732 i->dev_attrs[count] = NULL; 733 734 return &i->t; 735 } 736 737 /** 738 * ata_release_transport -- release ATA transport template instance 739 * @t: transport template instance 740 */ 741 void ata_release_transport(struct scsi_transport_template *t) 742 { 743 struct ata_internal *i = to_ata_internal(t); 744 745 transport_container_unregister(&i->t.host_attrs); 746 transport_container_unregister(&i->link_attr_cont); 747 transport_container_unregister(&i->dev_attr_cont); 748 749 kfree(i); 750 } 751 752 __init int libata_transport_init(void) 753 { 754 int error; 755 756 error = transport_class_register(&ata_link_class); 757 if (error) 758 goto out_unregister_transport; 759 error = transport_class_register(&ata_port_class); 760 if (error) 761 goto out_unregister_link; 762 error = transport_class_register(&ata_dev_class); 763 if (error) 764 goto out_unregister_port; 765 return 0; 766 767 out_unregister_port: 768 transport_class_unregister(&ata_port_class); 769 out_unregister_link: 770 transport_class_unregister(&ata_link_class); 771 out_unregister_transport: 772 return error; 773 774 } 775 776 void __exit libata_transport_exit(void) 777 { 778 transport_class_unregister(&ata_link_class); 779 transport_class_unregister(&ata_port_class); 780 transport_class_unregister(&ata_dev_class); 781 } 782