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 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_ZAC, "zac" }, 147 { ATA_DEV_NONE, "none" } 148 }; 149 ata_bitfield_name_search(class, ata_class_names) 150 151 152 static 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 }; 168 ata_bitfield_name_match(err, ata_err_names) 169 170 static 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 }; 199 ata_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) \ 205 static ssize_t \ 206 show_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)) \ 216 static DEVICE_ATTR(name, S_IRUGO, show_ata_port_##name, NULL) 217 218 ata_port_simple_attr(nr_pmp_links, nr_pmp_links, "%d\n", int); 219 ata_port_simple_attr(stats.idle_irq, idle_irq, "%ld\n", unsigned long); 220 ata_port_simple_attr(local_port_no, port_no, "%u\n", unsigned int); 221 222 static DECLARE_TRANSPORT_CLASS(ata_port_class, 223 "ata_port", NULL, NULL, NULL); 224 225 static 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 */ 237 static int ata_is_port(const struct device *dev) 238 { 239 return dev->release == ata_tport_release; 240 } 241 242 static 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 */ 256 void 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 */ 278 int 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 */ 325 static int noop(int x) { return x; } 326 327 #define ata_link_show_linkspeed(field, format) \ 328 static ssize_t \ 329 show_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) \ 339 static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL) 340 341 ata_link_linkspeed_attr(hw_sata_spd_limit, fls); 342 ata_link_linkspeed_attr(sata_spd_limit, fls); 343 ata_link_linkspeed_attr(sata_spd, noop); 344 345 346 static DECLARE_TRANSPORT_CLASS(ata_link_class, 347 "ata_link", NULL, NULL, NULL); 348 349 static 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 */ 361 static int ata_is_link(const struct device *dev) 362 { 363 return dev->release == ata_tlink_release; 364 } 365 366 static 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 */ 381 void 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 */ 405 int 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) \ 454 static ssize_t \ 455 show_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) \ 465 static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL) 466 467 ata_dev_attr(class, class); 468 ata_dev_attr(xfer, pio_mode); 469 ata_dev_attr(xfer, dma_mode); 470 ata_dev_attr(xfer, xfer_mode); 471 472 473 #define ata_dev_show_simple(field, format_string, cast) \ 474 static ssize_t \ 475 show_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)) \ 485 static DEVICE_ATTR(field, S_IRUGO, \ 486 show_ata_dev_##field, NULL) 487 488 ata_dev_simple_attr(spdn_cnt, "%d\n", int); 489 490 struct ata_show_ering_arg { 491 char* buf; 492 int written; 493 }; 494 495 static 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 } 508 509 static ssize_t 510 show_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 } 519 520 521 static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL); 522 523 static ssize_t 524 show_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 } 539 540 static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL); 541 542 static ssize_t 543 show_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 } 560 561 static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL); 562 563 static DECLARE_TRANSPORT_CLASS(ata_dev_class, 564 "ata_device", NULL, NULL, NULL); 565 566 static void ata_tdev_release(struct device *dev) 567 { 568 put_device(dev->parent); 569 } 570 571 /** 572 * ata_is_ata_dev -- check if a struct device represents a ATA device 573 * @dev: device to check 574 * 575 * Returns: 576 * %1 if the device represents a ATA device, %0 else 577 */ 578 static int ata_is_ata_dev(const struct device *dev) 579 { 580 return dev->release == ata_tdev_release; 581 } 582 583 static int ata_tdev_match(struct attribute_container *cont, 584 struct device *dev) 585 { 586 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); 587 if (!ata_is_ata_dev(dev)) 588 return 0; 589 return &i->dev_attr_cont.ac == cont; 590 } 591 592 /** 593 * ata_tdev_free -- free a ATA LINK 594 * @dev: ATA PHY to free 595 * 596 * Frees the specified ATA PHY. 597 * 598 * Note: 599 * This function must only be called on a PHY that has not 600 * successfully been added using ata_tdev_add(). 601 */ 602 static void ata_tdev_free(struct ata_device *dev) 603 { 604 transport_destroy_device(&dev->tdev); 605 put_device(&dev->tdev); 606 } 607 608 /** 609 * ata_tdev_delete -- remove ATA device 610 * @port: ATA PORT to remove 611 * 612 * Removes the specified ATA device. 613 */ 614 static void ata_tdev_delete(struct ata_device *ata_dev) 615 { 616 struct device *dev = &ata_dev->tdev; 617 618 transport_remove_device(dev); 619 device_del(dev); 620 ata_tdev_free(ata_dev); 621 } 622 623 624 /** 625 * ata_tdev_add -- initialize a transport ATA device structure. 626 * @ata_dev: ata_dev structure. 627 * 628 * Initialize an ATA device structure for sysfs. It will be added in the 629 * device tree below the ATA LINK device it belongs to. 630 * 631 * Returns %0 on success 632 */ 633 static int ata_tdev_add(struct ata_device *ata_dev) 634 { 635 struct device *dev = &ata_dev->tdev; 636 struct ata_link *link = ata_dev->link; 637 struct ata_port *ap = link->ap; 638 int error; 639 640 device_initialize(dev); 641 dev->parent = get_device(&link->tdev); 642 dev->release = ata_tdev_release; 643 if (ata_is_host_link(link)) 644 dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno); 645 else 646 dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp); 647 648 transport_setup_device(dev); 649 ata_acpi_bind_dev(ata_dev); 650 error = device_add(dev); 651 if (error) { 652 ata_tdev_free(ata_dev); 653 return error; 654 } 655 656 transport_add_device(dev); 657 transport_configure_device(dev); 658 return 0; 659 } 660 661 662 /* 663 * Setup / Teardown code 664 */ 665 666 #define SETUP_TEMPLATE(attrb, field, perm, test) \ 667 i->private_##attrb[count] = dev_attr_##field; \ 668 i->private_##attrb[count].attr.mode = perm; \ 669 i->attrb[count] = &i->private_##attrb[count]; \ 670 if (test) \ 671 count++ 672 673 #define SETUP_LINK_ATTRIBUTE(field) \ 674 SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1) 675 676 #define SETUP_PORT_ATTRIBUTE(field) \ 677 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1) 678 679 #define SETUP_DEV_ATTRIBUTE(field) \ 680 SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1) 681 682 /** 683 * ata_attach_transport -- instantiate ATA transport template 684 */ 685 struct scsi_transport_template *ata_attach_transport(void) 686 { 687 struct ata_internal *i; 688 int count; 689 690 i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL); 691 if (!i) 692 return NULL; 693 694 i->t.eh_strategy_handler = ata_scsi_error; 695 i->t.eh_timed_out = ata_scsi_timed_out; 696 i->t.user_scan = ata_scsi_user_scan; 697 698 i->t.host_attrs.ac.attrs = &i->port_attrs[0]; 699 i->t.host_attrs.ac.class = &ata_port_class.class; 700 i->t.host_attrs.ac.match = ata_tport_match; 701 transport_container_register(&i->t.host_attrs); 702 703 i->link_attr_cont.ac.class = &ata_link_class.class; 704 i->link_attr_cont.ac.attrs = &i->link_attrs[0]; 705 i->link_attr_cont.ac.match = ata_tlink_match; 706 transport_container_register(&i->link_attr_cont); 707 708 i->dev_attr_cont.ac.class = &ata_dev_class.class; 709 i->dev_attr_cont.ac.attrs = &i->dev_attrs[0]; 710 i->dev_attr_cont.ac.match = ata_tdev_match; 711 transport_container_register(&i->dev_attr_cont); 712 713 count = 0; 714 SETUP_PORT_ATTRIBUTE(nr_pmp_links); 715 SETUP_PORT_ATTRIBUTE(idle_irq); 716 SETUP_PORT_ATTRIBUTE(port_no); 717 BUG_ON(count > ATA_PORT_ATTRS); 718 i->port_attrs[count] = NULL; 719 720 count = 0; 721 SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit); 722 SETUP_LINK_ATTRIBUTE(sata_spd_limit); 723 SETUP_LINK_ATTRIBUTE(sata_spd); 724 BUG_ON(count > ATA_LINK_ATTRS); 725 i->link_attrs[count] = NULL; 726 727 count = 0; 728 SETUP_DEV_ATTRIBUTE(class); 729 SETUP_DEV_ATTRIBUTE(pio_mode); 730 SETUP_DEV_ATTRIBUTE(dma_mode); 731 SETUP_DEV_ATTRIBUTE(xfer_mode); 732 SETUP_DEV_ATTRIBUTE(spdn_cnt); 733 SETUP_DEV_ATTRIBUTE(ering); 734 SETUP_DEV_ATTRIBUTE(id); 735 SETUP_DEV_ATTRIBUTE(gscr); 736 BUG_ON(count > ATA_DEV_ATTRS); 737 i->dev_attrs[count] = NULL; 738 739 return &i->t; 740 } 741 742 /** 743 * ata_release_transport -- release ATA transport template instance 744 * @t: transport template instance 745 */ 746 void ata_release_transport(struct scsi_transport_template *t) 747 { 748 struct ata_internal *i = to_ata_internal(t); 749 750 transport_container_unregister(&i->t.host_attrs); 751 transport_container_unregister(&i->link_attr_cont); 752 transport_container_unregister(&i->dev_attr_cont); 753 754 kfree(i); 755 } 756 757 __init int libata_transport_init(void) 758 { 759 int error; 760 761 error = transport_class_register(&ata_link_class); 762 if (error) 763 goto out_unregister_transport; 764 error = transport_class_register(&ata_port_class); 765 if (error) 766 goto out_unregister_link; 767 error = transport_class_register(&ata_dev_class); 768 if (error) 769 goto out_unregister_port; 770 return 0; 771 772 out_unregister_port: 773 transport_class_unregister(&ata_port_class); 774 out_unregister_link: 775 transport_class_unregister(&ata_link_class); 776 out_unregister_transport: 777 return error; 778 779 } 780 781 void __exit libata_transport_exit(void) 782 { 783 transport_class_unregister(&ata_link_class); 784 transport_class_unregister(&ata_port_class); 785 transport_class_unregister(&ata_dev_class); 786 } 787