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_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 ata_port_simple_attr(local_port_no, port_no, "%u\n", unsigned int); 220 221 static DECLARE_TRANSPORT_CLASS(ata_port_class, 222 "ata_port", NULL, NULL, NULL); 223 224 static void ata_tport_release(struct device *dev) 225 { 226 put_device(dev->parent); 227 } 228 229 /** 230 * ata_is_port -- check if a struct device represents a ATA port 231 * @dev: device to check 232 * 233 * Returns: 234 * %1 if the device represents a ATA Port, %0 else 235 */ 236 static int ata_is_port(const struct device *dev) 237 { 238 return dev->release == ata_tport_release; 239 } 240 241 static int ata_tport_match(struct attribute_container *cont, 242 struct device *dev) 243 { 244 if (!ata_is_port(dev)) 245 return 0; 246 return &ata_scsi_transport_template->host_attrs.ac == cont; 247 } 248 249 /** 250 * ata_tport_delete -- remove ATA PORT 251 * @port: ATA PORT to remove 252 * 253 * Removes the specified ATA PORT. Remove the associated link as well. 254 */ 255 void ata_tport_delete(struct ata_port *ap) 256 { 257 struct device *dev = &ap->tdev; 258 259 ata_tlink_delete(&ap->link); 260 261 transport_remove_device(dev); 262 device_del(dev); 263 transport_destroy_device(dev); 264 put_device(dev); 265 } 266 267 /** ata_tport_add - initialize a transport ATA port structure 268 * 269 * @parent: parent device 270 * @ap: existing ata_port structure 271 * 272 * Initialize a ATA port structure for sysfs. It will be added to the device 273 * tree below the device specified by @parent which could be a PCI device. 274 * 275 * Returns %0 on success 276 */ 277 int ata_tport_add(struct device *parent, 278 struct ata_port *ap) 279 { 280 int error; 281 struct device *dev = &ap->tdev; 282 283 device_initialize(dev); 284 dev->type = &ata_port_type; 285 286 dev->parent = get_device(parent); 287 dev->release = ata_tport_release; 288 dev_set_name(dev, "ata%d", ap->print_id); 289 transport_setup_device(dev); 290 ata_acpi_bind_port(ap); 291 error = device_add(dev); 292 if (error) { 293 goto tport_err; 294 } 295 296 device_enable_async_suspend(dev); 297 pm_runtime_set_active(dev); 298 pm_runtime_enable(dev); 299 pm_runtime_forbid(dev); 300 301 transport_add_device(dev); 302 transport_configure_device(dev); 303 304 error = ata_tlink_add(&ap->link); 305 if (error) { 306 goto tport_link_err; 307 } 308 return 0; 309 310 tport_link_err: 311 transport_remove_device(dev); 312 device_del(dev); 313 314 tport_err: 315 transport_destroy_device(dev); 316 put_device(dev); 317 return error; 318 } 319 320 321 /* 322 * ATA link attributes 323 */ 324 static int noop(int x) { return x; } 325 326 #define ata_link_show_linkspeed(field, format) \ 327 static ssize_t \ 328 show_ata_link_##field(struct device *dev, \ 329 struct device_attribute *attr, char *buf) \ 330 { \ 331 struct ata_link *link = transport_class_to_link(dev); \ 332 \ 333 return sprintf(buf, "%s\n", sata_spd_string(format(link->field))); \ 334 } 335 336 #define ata_link_linkspeed_attr(field, format) \ 337 ata_link_show_linkspeed(field, format) \ 338 static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL) 339 340 ata_link_linkspeed_attr(hw_sata_spd_limit, fls); 341 ata_link_linkspeed_attr(sata_spd_limit, fls); 342 ata_link_linkspeed_attr(sata_spd, noop); 343 344 345 static DECLARE_TRANSPORT_CLASS(ata_link_class, 346 "ata_link", NULL, NULL, NULL); 347 348 static void ata_tlink_release(struct device *dev) 349 { 350 put_device(dev->parent); 351 } 352 353 /** 354 * ata_is_link -- check if a struct device represents a ATA link 355 * @dev: device to check 356 * 357 * Returns: 358 * %1 if the device represents a ATA link, %0 else 359 */ 360 static int ata_is_link(const struct device *dev) 361 { 362 return dev->release == ata_tlink_release; 363 } 364 365 static int ata_tlink_match(struct attribute_container *cont, 366 struct device *dev) 367 { 368 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); 369 if (!ata_is_link(dev)) 370 return 0; 371 return &i->link_attr_cont.ac == cont; 372 } 373 374 /** 375 * ata_tlink_delete -- remove ATA LINK 376 * @port: ATA LINK to remove 377 * 378 * Removes the specified ATA LINK. remove associated ATA device(s) as well. 379 */ 380 void ata_tlink_delete(struct ata_link *link) 381 { 382 struct device *dev = &link->tdev; 383 struct ata_device *ata_dev; 384 385 ata_for_each_dev(ata_dev, link, ALL) { 386 ata_tdev_delete(ata_dev); 387 } 388 389 transport_remove_device(dev); 390 device_del(dev); 391 transport_destroy_device(dev); 392 put_device(dev); 393 } 394 395 /** 396 * ata_tlink_add -- initialize a transport ATA link structure 397 * @link: allocated ata_link structure. 398 * 399 * Initialize an ATA LINK structure for sysfs. It will be added in the 400 * device tree below the ATA PORT it belongs to. 401 * 402 * Returns %0 on success 403 */ 404 int ata_tlink_add(struct ata_link *link) 405 { 406 struct device *dev = &link->tdev; 407 struct ata_port *ap = link->ap; 408 struct ata_device *ata_dev; 409 int error; 410 411 device_initialize(dev); 412 dev->parent = get_device(&ap->tdev); 413 dev->release = ata_tlink_release; 414 if (ata_is_host_link(link)) 415 dev_set_name(dev, "link%d", ap->print_id); 416 else 417 dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp); 418 419 transport_setup_device(dev); 420 421 error = device_add(dev); 422 if (error) { 423 goto tlink_err; 424 } 425 426 transport_add_device(dev); 427 transport_configure_device(dev); 428 429 ata_for_each_dev(ata_dev, link, ALL) { 430 error = ata_tdev_add(ata_dev); 431 if (error) { 432 goto tlink_dev_err; 433 } 434 } 435 return 0; 436 tlink_dev_err: 437 while (--ata_dev >= link->device) { 438 ata_tdev_delete(ata_dev); 439 } 440 transport_remove_device(dev); 441 device_del(dev); 442 tlink_err: 443 transport_destroy_device(dev); 444 put_device(dev); 445 return error; 446 } 447 448 /* 449 * ATA device attributes 450 */ 451 452 #define ata_dev_show_class(title, field) \ 453 static ssize_t \ 454 show_ata_dev_##field(struct device *dev, \ 455 struct device_attribute *attr, char *buf) \ 456 { \ 457 struct ata_device *ata_dev = transport_class_to_dev(dev); \ 458 \ 459 return get_ata_##title##_names(ata_dev->field, buf); \ 460 } 461 462 #define ata_dev_attr(title, field) \ 463 ata_dev_show_class(title, field) \ 464 static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL) 465 466 ata_dev_attr(class, class); 467 ata_dev_attr(xfer, pio_mode); 468 ata_dev_attr(xfer, dma_mode); 469 ata_dev_attr(xfer, xfer_mode); 470 471 472 #define ata_dev_show_simple(field, format_string, cast) \ 473 static ssize_t \ 474 show_ata_dev_##field(struct device *dev, \ 475 struct device_attribute *attr, char *buf) \ 476 { \ 477 struct ata_device *ata_dev = transport_class_to_dev(dev); \ 478 \ 479 return snprintf(buf, 20, format_string, cast ata_dev->field); \ 480 } 481 482 #define ata_dev_simple_attr(field, format_string, type) \ 483 ata_dev_show_simple(field, format_string, (type)) \ 484 static DEVICE_ATTR(field, S_IRUGO, \ 485 show_ata_dev_##field, NULL) 486 487 ata_dev_simple_attr(spdn_cnt, "%d\n", int); 488 489 struct ata_show_ering_arg { 490 char* buf; 491 int written; 492 }; 493 494 static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg) 495 { 496 struct ata_show_ering_arg* arg = void_arg; 497 struct timespec time; 498 499 jiffies_to_timespec(ent->timestamp,&time); 500 arg->written += sprintf(arg->buf + arg->written, 501 "[%5lu.%06lu]", 502 time.tv_sec, time.tv_nsec); 503 arg->written += get_ata_err_names(ent->err_mask, 504 arg->buf + arg->written); 505 return 0; 506 } 507 508 static ssize_t 509 show_ata_dev_ering(struct device *dev, 510 struct device_attribute *attr, char *buf) 511 { 512 struct ata_device *ata_dev = transport_class_to_dev(dev); 513 struct ata_show_ering_arg arg = { buf, 0 }; 514 515 ata_ering_map(&ata_dev->ering, ata_show_ering, &arg); 516 return arg.written; 517 } 518 519 520 static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL); 521 522 static ssize_t 523 show_ata_dev_id(struct device *dev, 524 struct device_attribute *attr, char *buf) 525 { 526 struct ata_device *ata_dev = transport_class_to_dev(dev); 527 int written = 0, i = 0; 528 529 if (ata_dev->class == ATA_DEV_PMP) 530 return 0; 531 for(i=0;i<ATA_ID_WORDS;i++) { 532 written += snprintf(buf+written, 20, "%04x%c", 533 ata_dev->id[i], 534 ((i+1) & 7) ? ' ' : '\n'); 535 } 536 return written; 537 } 538 539 static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL); 540 541 static ssize_t 542 show_ata_dev_gscr(struct device *dev, 543 struct device_attribute *attr, char *buf) 544 { 545 struct ata_device *ata_dev = transport_class_to_dev(dev); 546 int written = 0, i = 0; 547 548 if (ata_dev->class != ATA_DEV_PMP) 549 return 0; 550 for(i=0;i<SATA_PMP_GSCR_DWORDS;i++) { 551 written += snprintf(buf+written, 20, "%08x%c", 552 ata_dev->gscr[i], 553 ((i+1) & 3) ? ' ' : '\n'); 554 } 555 if (SATA_PMP_GSCR_DWORDS & 3) 556 buf[written-1] = '\n'; 557 return written; 558 } 559 560 static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL); 561 562 static DECLARE_TRANSPORT_CLASS(ata_dev_class, 563 "ata_device", NULL, NULL, NULL); 564 565 static void ata_tdev_release(struct device *dev) 566 { 567 put_device(dev->parent); 568 } 569 570 /** 571 * ata_is_ata_dev -- check if a struct device represents a ATA device 572 * @dev: device to check 573 * 574 * Returns: 575 * %1 if the device represents a ATA device, %0 else 576 */ 577 static int ata_is_ata_dev(const struct device *dev) 578 { 579 return dev->release == ata_tdev_release; 580 } 581 582 static int ata_tdev_match(struct attribute_container *cont, 583 struct device *dev) 584 { 585 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); 586 if (!ata_is_ata_dev(dev)) 587 return 0; 588 return &i->dev_attr_cont.ac == cont; 589 } 590 591 /** 592 * ata_tdev_free -- free a ATA LINK 593 * @dev: ATA PHY to free 594 * 595 * Frees the specified ATA PHY. 596 * 597 * Note: 598 * This function must only be called on a PHY that has not 599 * successfully been added using ata_tdev_add(). 600 */ 601 static void ata_tdev_free(struct ata_device *dev) 602 { 603 transport_destroy_device(&dev->tdev); 604 put_device(&dev->tdev); 605 } 606 607 /** 608 * ata_tdev_delete -- remove ATA device 609 * @port: ATA PORT to remove 610 * 611 * Removes the specified ATA device. 612 */ 613 static void ata_tdev_delete(struct ata_device *ata_dev) 614 { 615 struct device *dev = &ata_dev->tdev; 616 617 transport_remove_device(dev); 618 device_del(dev); 619 ata_tdev_free(ata_dev); 620 } 621 622 623 /** 624 * ata_tdev_add -- initialize a transport ATA device structure. 625 * @ata_dev: ata_dev structure. 626 * 627 * Initialize an ATA device structure for sysfs. It will be added in the 628 * device tree below the ATA LINK device it belongs to. 629 * 630 * Returns %0 on success 631 */ 632 static int ata_tdev_add(struct ata_device *ata_dev) 633 { 634 struct device *dev = &ata_dev->tdev; 635 struct ata_link *link = ata_dev->link; 636 struct ata_port *ap = link->ap; 637 int error; 638 639 device_initialize(dev); 640 dev->parent = get_device(&link->tdev); 641 dev->release = ata_tdev_release; 642 if (ata_is_host_link(link)) 643 dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno); 644 else 645 dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp); 646 647 transport_setup_device(dev); 648 ata_acpi_bind_dev(ata_dev); 649 error = device_add(dev); 650 if (error) { 651 ata_tdev_free(ata_dev); 652 return error; 653 } 654 655 transport_add_device(dev); 656 transport_configure_device(dev); 657 return 0; 658 } 659 660 661 /* 662 * Setup / Teardown code 663 */ 664 665 #define SETUP_TEMPLATE(attrb, field, perm, test) \ 666 i->private_##attrb[count] = dev_attr_##field; \ 667 i->private_##attrb[count].attr.mode = perm; \ 668 i->attrb[count] = &i->private_##attrb[count]; \ 669 if (test) \ 670 count++ 671 672 #define SETUP_LINK_ATTRIBUTE(field) \ 673 SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1) 674 675 #define SETUP_PORT_ATTRIBUTE(field) \ 676 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1) 677 678 #define SETUP_DEV_ATTRIBUTE(field) \ 679 SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1) 680 681 /** 682 * ata_attach_transport -- instantiate ATA transport template 683 */ 684 struct scsi_transport_template *ata_attach_transport(void) 685 { 686 struct ata_internal *i; 687 int count; 688 689 i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL); 690 if (!i) 691 return NULL; 692 693 i->t.eh_strategy_handler = ata_scsi_error; 694 i->t.eh_timed_out = ata_scsi_timed_out; 695 i->t.user_scan = ata_scsi_user_scan; 696 697 i->t.host_attrs.ac.attrs = &i->port_attrs[0]; 698 i->t.host_attrs.ac.class = &ata_port_class.class; 699 i->t.host_attrs.ac.match = ata_tport_match; 700 transport_container_register(&i->t.host_attrs); 701 702 i->link_attr_cont.ac.class = &ata_link_class.class; 703 i->link_attr_cont.ac.attrs = &i->link_attrs[0]; 704 i->link_attr_cont.ac.match = ata_tlink_match; 705 transport_container_register(&i->link_attr_cont); 706 707 i->dev_attr_cont.ac.class = &ata_dev_class.class; 708 i->dev_attr_cont.ac.attrs = &i->dev_attrs[0]; 709 i->dev_attr_cont.ac.match = ata_tdev_match; 710 transport_container_register(&i->dev_attr_cont); 711 712 count = 0; 713 SETUP_PORT_ATTRIBUTE(nr_pmp_links); 714 SETUP_PORT_ATTRIBUTE(idle_irq); 715 SETUP_PORT_ATTRIBUTE(port_no); 716 BUG_ON(count > ATA_PORT_ATTRS); 717 i->port_attrs[count] = NULL; 718 719 count = 0; 720 SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit); 721 SETUP_LINK_ATTRIBUTE(sata_spd_limit); 722 SETUP_LINK_ATTRIBUTE(sata_spd); 723 BUG_ON(count > ATA_LINK_ATTRS); 724 i->link_attrs[count] = NULL; 725 726 count = 0; 727 SETUP_DEV_ATTRIBUTE(class); 728 SETUP_DEV_ATTRIBUTE(pio_mode); 729 SETUP_DEV_ATTRIBUTE(dma_mode); 730 SETUP_DEV_ATTRIBUTE(xfer_mode); 731 SETUP_DEV_ATTRIBUTE(spdn_cnt); 732 SETUP_DEV_ATTRIBUTE(ering); 733 SETUP_DEV_ATTRIBUTE(id); 734 SETUP_DEV_ATTRIBUTE(gscr); 735 BUG_ON(count > ATA_DEV_ATTRS); 736 i->dev_attrs[count] = NULL; 737 738 return &i->t; 739 } 740 741 /** 742 * ata_release_transport -- release ATA transport template instance 743 * @t: transport template instance 744 */ 745 void ata_release_transport(struct scsi_transport_template *t) 746 { 747 struct ata_internal *i = to_ata_internal(t); 748 749 transport_container_unregister(&i->t.host_attrs); 750 transport_container_unregister(&i->link_attr_cont); 751 transport_container_unregister(&i->dev_attr_cont); 752 753 kfree(i); 754 } 755 756 __init int libata_transport_init(void) 757 { 758 int error; 759 760 error = transport_class_register(&ata_link_class); 761 if (error) 762 goto out_unregister_transport; 763 error = transport_class_register(&ata_port_class); 764 if (error) 765 goto out_unregister_link; 766 error = transport_class_register(&ata_dev_class); 767 if (error) 768 goto out_unregister_port; 769 return 0; 770 771 out_unregister_port: 772 transport_class_unregister(&ata_port_class); 773 out_unregister_link: 774 transport_class_unregister(&ata_link_class); 775 out_unregister_transport: 776 return error; 777 778 } 779 780 void __exit libata_transport_exit(void) 781 { 782 transport_class_unregister(&ata_link_class); 783 transport_class_unregister(&ata_port_class); 784 transport_class_unregister(&ata_dev_class); 785 } 786