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