1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2008 ioogle, Inc. All rights reserved. 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_search(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 scnprintf(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 struct ata_port *ap = tdev_to_port(dev); 228 ata_host_put(ap->host); 229 } 230 231 /** 232 * ata_is_port -- check if a struct device represents a ATA port 233 * @dev: device to check 234 * 235 * Returns: 236 * %1 if the device represents a ATA Port, %0 else 237 */ 238 static int ata_is_port(const struct device *dev) 239 { 240 return dev->release == ata_tport_release; 241 } 242 243 static int ata_tport_match(struct attribute_container *cont, 244 struct device *dev) 245 { 246 if (!ata_is_port(dev)) 247 return 0; 248 return &ata_scsi_transport_template->host_attrs.ac == cont; 249 } 250 251 /** 252 * ata_tport_delete -- remove ATA PORT 253 * @ap: ATA PORT to remove 254 * 255 * Removes the specified ATA PORT. Remove the associated link as well. 256 */ 257 void ata_tport_delete(struct ata_port *ap) 258 { 259 struct device *dev = &ap->tdev; 260 261 ata_tlink_delete(&ap->link); 262 263 transport_remove_device(dev); 264 device_del(dev); 265 transport_destroy_device(dev); 266 put_device(dev); 267 } 268 269 /** ata_tport_add - initialize a transport ATA port structure 270 * 271 * @parent: parent device 272 * @ap: existing ata_port structure 273 * 274 * Initialize a ATA port structure for sysfs. It will be added to the device 275 * tree below the device specified by @parent which could be a PCI device. 276 * 277 * Returns %0 on success 278 */ 279 int ata_tport_add(struct device *parent, 280 struct ata_port *ap) 281 { 282 int error; 283 struct device *dev = &ap->tdev; 284 285 device_initialize(dev); 286 dev->type = &ata_port_type; 287 288 dev->parent = parent; 289 ata_host_get(ap->host); 290 dev->release = ata_tport_release; 291 dev_set_name(dev, "ata%d", ap->print_id); 292 transport_setup_device(dev); 293 ata_acpi_bind_port(ap); 294 error = device_add(dev); 295 if (error) { 296 goto tport_err; 297 } 298 299 device_enable_async_suspend(dev); 300 pm_runtime_set_active(dev); 301 pm_runtime_enable(dev); 302 pm_runtime_forbid(dev); 303 304 error = transport_add_device(dev); 305 if (error) 306 goto tport_transport_add_err; 307 transport_configure_device(dev); 308 309 error = ata_tlink_add(&ap->link); 310 if (error) { 311 goto tport_link_err; 312 } 313 return 0; 314 315 tport_link_err: 316 transport_remove_device(dev); 317 tport_transport_add_err: 318 device_del(dev); 319 320 tport_err: 321 transport_destroy_device(dev); 322 put_device(dev); 323 return error; 324 } 325 326 327 /* 328 * ATA link attributes 329 */ 330 static int noop(int x) { return x; } 331 332 #define ata_link_show_linkspeed(field, format) \ 333 static ssize_t \ 334 show_ata_link_##field(struct device *dev, \ 335 struct device_attribute *attr, char *buf) \ 336 { \ 337 struct ata_link *link = transport_class_to_link(dev); \ 338 \ 339 return sprintf(buf, "%s\n", sata_spd_string(format(link->field))); \ 340 } 341 342 #define ata_link_linkspeed_attr(field, format) \ 343 ata_link_show_linkspeed(field, format) \ 344 static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL) 345 346 ata_link_linkspeed_attr(hw_sata_spd_limit, fls); 347 ata_link_linkspeed_attr(sata_spd_limit, fls); 348 ata_link_linkspeed_attr(sata_spd, noop); 349 350 351 static DECLARE_TRANSPORT_CLASS(ata_link_class, 352 "ata_link", NULL, NULL, NULL); 353 354 static void ata_tlink_release(struct device *dev) 355 { 356 } 357 358 /** 359 * ata_is_link -- check if a struct device represents a ATA link 360 * @dev: device to check 361 * 362 * Returns: 363 * %1 if the device represents a ATA link, %0 else 364 */ 365 static int ata_is_link(const struct device *dev) 366 { 367 return dev->release == ata_tlink_release; 368 } 369 370 static int ata_tlink_match(struct attribute_container *cont, 371 struct device *dev) 372 { 373 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); 374 if (!ata_is_link(dev)) 375 return 0; 376 return &i->link_attr_cont.ac == cont; 377 } 378 379 /** 380 * ata_tlink_delete -- remove ATA LINK 381 * @link: ATA LINK to remove 382 * 383 * Removes the specified ATA LINK. remove associated ATA device(s) as well. 384 */ 385 void ata_tlink_delete(struct ata_link *link) 386 { 387 struct device *dev = &link->tdev; 388 struct ata_device *ata_dev; 389 390 ata_for_each_dev(ata_dev, link, ALL) { 391 ata_tdev_delete(ata_dev); 392 } 393 394 transport_remove_device(dev); 395 device_del(dev); 396 transport_destroy_device(dev); 397 put_device(dev); 398 } 399 400 /** 401 * ata_tlink_add -- initialize a transport ATA link structure 402 * @link: allocated ata_link structure. 403 * 404 * Initialize an ATA LINK structure for sysfs. It will be added in the 405 * device tree below the ATA PORT it belongs to. 406 * 407 * Returns %0 on success 408 */ 409 int ata_tlink_add(struct ata_link *link) 410 { 411 struct device *dev = &link->tdev; 412 struct ata_port *ap = link->ap; 413 struct ata_device *ata_dev; 414 int error; 415 416 device_initialize(dev); 417 dev->parent = &ap->tdev; 418 dev->release = ata_tlink_release; 419 if (ata_is_host_link(link)) 420 dev_set_name(dev, "link%d", ap->print_id); 421 else 422 dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp); 423 424 transport_setup_device(dev); 425 426 error = device_add(dev); 427 if (error) { 428 goto tlink_err; 429 } 430 431 transport_add_device(dev); 432 transport_configure_device(dev); 433 434 ata_for_each_dev(ata_dev, link, ALL) { 435 error = ata_tdev_add(ata_dev); 436 if (error) { 437 goto tlink_dev_err; 438 } 439 } 440 return 0; 441 tlink_dev_err: 442 while (--ata_dev >= link->device) { 443 ata_tdev_delete(ata_dev); 444 } 445 transport_remove_device(dev); 446 device_del(dev); 447 tlink_err: 448 transport_destroy_device(dev); 449 put_device(dev); 450 return error; 451 } 452 453 /* 454 * ATA device attributes 455 */ 456 457 #define ata_dev_show_class(title, field) \ 458 static ssize_t \ 459 show_ata_dev_##field(struct device *dev, \ 460 struct device_attribute *attr, char *buf) \ 461 { \ 462 struct ata_device *ata_dev = transport_class_to_dev(dev); \ 463 \ 464 return get_ata_##title##_names(ata_dev->field, buf); \ 465 } 466 467 #define ata_dev_attr(title, field) \ 468 ata_dev_show_class(title, field) \ 469 static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL) 470 471 ata_dev_attr(class, class); 472 ata_dev_attr(xfer, pio_mode); 473 ata_dev_attr(xfer, dma_mode); 474 ata_dev_attr(xfer, xfer_mode); 475 476 477 #define ata_dev_show_simple(field, format_string, cast) \ 478 static ssize_t \ 479 show_ata_dev_##field(struct device *dev, \ 480 struct device_attribute *attr, char *buf) \ 481 { \ 482 struct ata_device *ata_dev = transport_class_to_dev(dev); \ 483 \ 484 return scnprintf(buf, 20, format_string, cast ata_dev->field); \ 485 } 486 487 #define ata_dev_simple_attr(field, format_string, type) \ 488 ata_dev_show_simple(field, format_string, (type)) \ 489 static DEVICE_ATTR(field, S_IRUGO, \ 490 show_ata_dev_##field, NULL) 491 492 ata_dev_simple_attr(spdn_cnt, "%d\n", int); 493 494 struct ata_show_ering_arg { 495 char* buf; 496 int written; 497 }; 498 499 static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg) 500 { 501 struct ata_show_ering_arg* arg = void_arg; 502 u64 seconds; 503 u32 rem; 504 505 seconds = div_u64_rem(ent->timestamp, HZ, &rem); 506 arg->written += sprintf(arg->buf + arg->written, 507 "[%5llu.%09lu]", seconds, 508 rem * NSEC_PER_SEC / HZ); 509 arg->written += get_ata_err_names(ent->err_mask, 510 arg->buf + arg->written); 511 return 0; 512 } 513 514 static ssize_t 515 show_ata_dev_ering(struct device *dev, 516 struct device_attribute *attr, char *buf) 517 { 518 struct ata_device *ata_dev = transport_class_to_dev(dev); 519 struct ata_show_ering_arg arg = { buf, 0 }; 520 521 ata_ering_map(&ata_dev->ering, ata_show_ering, &arg); 522 return arg.written; 523 } 524 525 526 static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL); 527 528 static ssize_t 529 show_ata_dev_id(struct device *dev, 530 struct device_attribute *attr, char *buf) 531 { 532 struct ata_device *ata_dev = transport_class_to_dev(dev); 533 int written = 0, i = 0; 534 535 if (ata_dev->class == ATA_DEV_PMP) 536 return 0; 537 for(i=0;i<ATA_ID_WORDS;i++) { 538 written += scnprintf(buf+written, 20, "%04x%c", 539 ata_dev->id[i], 540 ((i+1) & 7) ? ' ' : '\n'); 541 } 542 return written; 543 } 544 545 static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL); 546 547 static ssize_t 548 show_ata_dev_gscr(struct device *dev, 549 struct device_attribute *attr, char *buf) 550 { 551 struct ata_device *ata_dev = transport_class_to_dev(dev); 552 int written = 0, i = 0; 553 554 if (ata_dev->class != ATA_DEV_PMP) 555 return 0; 556 for(i=0;i<SATA_PMP_GSCR_DWORDS;i++) { 557 written += scnprintf(buf+written, 20, "%08x%c", 558 ata_dev->gscr[i], 559 ((i+1) & 3) ? ' ' : '\n'); 560 } 561 if (SATA_PMP_GSCR_DWORDS & 3) 562 buf[written-1] = '\n'; 563 return written; 564 } 565 566 static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL); 567 568 static ssize_t 569 show_ata_dev_trim(struct device *dev, 570 struct device_attribute *attr, char *buf) 571 { 572 struct ata_device *ata_dev = transport_class_to_dev(dev); 573 unsigned char *mode; 574 575 if (!ata_id_has_trim(ata_dev->id)) 576 mode = "unsupported"; 577 else if (ata_dev->horkage & ATA_HORKAGE_NOTRIM) 578 mode = "forced_unsupported"; 579 else if (ata_dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) 580 mode = "forced_unqueued"; 581 else if (ata_fpdma_dsm_supported(ata_dev)) 582 mode = "queued"; 583 else 584 mode = "unqueued"; 585 586 return scnprintf(buf, 20, "%s\n", mode); 587 } 588 589 static DEVICE_ATTR(trim, S_IRUGO, show_ata_dev_trim, NULL); 590 591 static DECLARE_TRANSPORT_CLASS(ata_dev_class, 592 "ata_device", NULL, NULL, NULL); 593 594 static void ata_tdev_release(struct device *dev) 595 { 596 } 597 598 /** 599 * ata_is_ata_dev -- check if a struct device represents a ATA device 600 * @dev: device to check 601 * 602 * Returns: 603 * %1 if the device represents a ATA device, %0 else 604 */ 605 static int ata_is_ata_dev(const struct device *dev) 606 { 607 return dev->release == ata_tdev_release; 608 } 609 610 static int ata_tdev_match(struct attribute_container *cont, 611 struct device *dev) 612 { 613 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); 614 if (!ata_is_ata_dev(dev)) 615 return 0; 616 return &i->dev_attr_cont.ac == cont; 617 } 618 619 /** 620 * ata_tdev_free -- free a ATA LINK 621 * @dev: ATA PHY to free 622 * 623 * Frees the specified ATA PHY. 624 * 625 * Note: 626 * This function must only be called on a PHY that has not 627 * successfully been added using ata_tdev_add(). 628 */ 629 static void ata_tdev_free(struct ata_device *dev) 630 { 631 transport_destroy_device(&dev->tdev); 632 put_device(&dev->tdev); 633 } 634 635 /** 636 * ata_tdev_delete -- remove ATA device 637 * @ata_dev: ATA device to remove 638 * 639 * Removes the specified ATA device. 640 */ 641 static void ata_tdev_delete(struct ata_device *ata_dev) 642 { 643 struct device *dev = &ata_dev->tdev; 644 645 transport_remove_device(dev); 646 device_del(dev); 647 ata_tdev_free(ata_dev); 648 } 649 650 651 /** 652 * ata_tdev_add -- initialize a transport ATA device structure. 653 * @ata_dev: ata_dev structure. 654 * 655 * Initialize an ATA device structure for sysfs. It will be added in the 656 * device tree below the ATA LINK device it belongs to. 657 * 658 * Returns %0 on success 659 */ 660 static int ata_tdev_add(struct ata_device *ata_dev) 661 { 662 struct device *dev = &ata_dev->tdev; 663 struct ata_link *link = ata_dev->link; 664 struct ata_port *ap = link->ap; 665 int error; 666 667 device_initialize(dev); 668 dev->parent = &link->tdev; 669 dev->release = ata_tdev_release; 670 if (ata_is_host_link(link)) 671 dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno); 672 else 673 dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp); 674 675 transport_setup_device(dev); 676 ata_acpi_bind_dev(ata_dev); 677 error = device_add(dev); 678 if (error) { 679 ata_tdev_free(ata_dev); 680 return error; 681 } 682 683 transport_add_device(dev); 684 transport_configure_device(dev); 685 return 0; 686 } 687 688 689 /* 690 * Setup / Teardown code 691 */ 692 693 #define SETUP_TEMPLATE(attrb, field, perm, test) \ 694 i->private_##attrb[count] = dev_attr_##field; \ 695 i->private_##attrb[count].attr.mode = perm; \ 696 i->attrb[count] = &i->private_##attrb[count]; \ 697 if (test) \ 698 count++ 699 700 #define SETUP_LINK_ATTRIBUTE(field) \ 701 SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1) 702 703 #define SETUP_PORT_ATTRIBUTE(field) \ 704 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1) 705 706 #define SETUP_DEV_ATTRIBUTE(field) \ 707 SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1) 708 709 /** 710 * ata_attach_transport -- instantiate ATA transport template 711 */ 712 struct scsi_transport_template *ata_attach_transport(void) 713 { 714 struct ata_internal *i; 715 int count; 716 717 i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL); 718 if (!i) 719 return NULL; 720 721 i->t.eh_strategy_handler = ata_scsi_error; 722 i->t.user_scan = ata_scsi_user_scan; 723 724 i->t.host_attrs.ac.attrs = &i->port_attrs[0]; 725 i->t.host_attrs.ac.class = &ata_port_class.class; 726 i->t.host_attrs.ac.match = ata_tport_match; 727 transport_container_register(&i->t.host_attrs); 728 729 i->link_attr_cont.ac.class = &ata_link_class.class; 730 i->link_attr_cont.ac.attrs = &i->link_attrs[0]; 731 i->link_attr_cont.ac.match = ata_tlink_match; 732 transport_container_register(&i->link_attr_cont); 733 734 i->dev_attr_cont.ac.class = &ata_dev_class.class; 735 i->dev_attr_cont.ac.attrs = &i->dev_attrs[0]; 736 i->dev_attr_cont.ac.match = ata_tdev_match; 737 transport_container_register(&i->dev_attr_cont); 738 739 count = 0; 740 SETUP_PORT_ATTRIBUTE(nr_pmp_links); 741 SETUP_PORT_ATTRIBUTE(idle_irq); 742 SETUP_PORT_ATTRIBUTE(port_no); 743 BUG_ON(count > ATA_PORT_ATTRS); 744 i->port_attrs[count] = NULL; 745 746 count = 0; 747 SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit); 748 SETUP_LINK_ATTRIBUTE(sata_spd_limit); 749 SETUP_LINK_ATTRIBUTE(sata_spd); 750 BUG_ON(count > ATA_LINK_ATTRS); 751 i->link_attrs[count] = NULL; 752 753 count = 0; 754 SETUP_DEV_ATTRIBUTE(class); 755 SETUP_DEV_ATTRIBUTE(pio_mode); 756 SETUP_DEV_ATTRIBUTE(dma_mode); 757 SETUP_DEV_ATTRIBUTE(xfer_mode); 758 SETUP_DEV_ATTRIBUTE(spdn_cnt); 759 SETUP_DEV_ATTRIBUTE(ering); 760 SETUP_DEV_ATTRIBUTE(id); 761 SETUP_DEV_ATTRIBUTE(gscr); 762 SETUP_DEV_ATTRIBUTE(trim); 763 BUG_ON(count > ATA_DEV_ATTRS); 764 i->dev_attrs[count] = NULL; 765 766 return &i->t; 767 } 768 769 /** 770 * ata_release_transport -- release ATA transport template instance 771 * @t: transport template instance 772 */ 773 void ata_release_transport(struct scsi_transport_template *t) 774 { 775 struct ata_internal *i = to_ata_internal(t); 776 777 transport_container_unregister(&i->t.host_attrs); 778 transport_container_unregister(&i->link_attr_cont); 779 transport_container_unregister(&i->dev_attr_cont); 780 781 kfree(i); 782 } 783 784 __init int libata_transport_init(void) 785 { 786 int error; 787 788 error = transport_class_register(&ata_link_class); 789 if (error) 790 goto out_unregister_transport; 791 error = transport_class_register(&ata_port_class); 792 if (error) 793 goto out_unregister_link; 794 error = transport_class_register(&ata_dev_class); 795 if (error) 796 goto out_unregister_port; 797 return 0; 798 799 out_unregister_port: 800 transport_class_unregister(&ata_port_class); 801 out_unregister_link: 802 transport_class_unregister(&ata_link_class); 803 out_unregister_transport: 804 return error; 805 806 } 807 808 void __exit libata_transport_exit(void) 809 { 810 transport_class_unregister(&ata_link_class); 811 transport_class_unregister(&ata_port_class); 812 transport_class_unregister(&ata_dev_class); 813 } 814