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 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 transport_add_device(dev); 305 transport_configure_device(dev); 306 307 error = ata_tlink_add(&ap->link); 308 if (error) { 309 goto tport_link_err; 310 } 311 return 0; 312 313 tport_link_err: 314 transport_remove_device(dev); 315 device_del(dev); 316 317 tport_err: 318 transport_destroy_device(dev); 319 put_device(dev); 320 return error; 321 } 322 323 /** 324 * ata_port_classify - determine device type based on ATA-spec signature 325 * @ap: ATA port device on which the classification should be run 326 * @tf: ATA taskfile register set for device to be identified 327 * 328 * A wrapper around ata_dev_classify() to provide additional logging 329 * 330 * RETURNS: 331 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP, 332 * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure. 333 */ 334 unsigned int ata_port_classify(struct ata_port *ap, 335 const struct ata_taskfile *tf) 336 { 337 int i; 338 unsigned int class = ata_dev_classify(tf); 339 340 /* Start with index '1' to skip the 'unknown' entry */ 341 for (i = 1; i < ARRAY_SIZE(ata_class_names); i++) { 342 if (ata_class_names[i].value == class) { 343 ata_port_dbg(ap, "found %s device by sig\n", 344 ata_class_names[i].name); 345 return class; 346 } 347 } 348 349 ata_port_info(ap, "found unknown device (class %u)\n", class); 350 return class; 351 } 352 EXPORT_SYMBOL_GPL(ata_port_classify); 353 354 /* 355 * ATA link attributes 356 */ 357 static int noop(int x) { return x; } 358 359 #define ata_link_show_linkspeed(field, format) \ 360 static ssize_t \ 361 show_ata_link_##field(struct device *dev, \ 362 struct device_attribute *attr, char *buf) \ 363 { \ 364 struct ata_link *link = transport_class_to_link(dev); \ 365 \ 366 return sprintf(buf, "%s\n", sata_spd_string(format(link->field))); \ 367 } 368 369 #define ata_link_linkspeed_attr(field, format) \ 370 ata_link_show_linkspeed(field, format) \ 371 static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL) 372 373 ata_link_linkspeed_attr(hw_sata_spd_limit, fls); 374 ata_link_linkspeed_attr(sata_spd_limit, fls); 375 ata_link_linkspeed_attr(sata_spd, noop); 376 377 378 static DECLARE_TRANSPORT_CLASS(ata_link_class, 379 "ata_link", NULL, NULL, NULL); 380 381 static void ata_tlink_release(struct device *dev) 382 { 383 } 384 385 /** 386 * ata_is_link -- check if a struct device represents a ATA link 387 * @dev: device to check 388 * 389 * Returns: 390 * %1 if the device represents a ATA link, %0 else 391 */ 392 static int ata_is_link(const struct device *dev) 393 { 394 return dev->release == ata_tlink_release; 395 } 396 397 static int ata_tlink_match(struct attribute_container *cont, 398 struct device *dev) 399 { 400 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); 401 if (!ata_is_link(dev)) 402 return 0; 403 return &i->link_attr_cont.ac == cont; 404 } 405 406 /** 407 * ata_tlink_delete -- remove ATA LINK 408 * @link: ATA LINK to remove 409 * 410 * Removes the specified ATA LINK. remove associated ATA device(s) as well. 411 */ 412 void ata_tlink_delete(struct ata_link *link) 413 { 414 struct device *dev = &link->tdev; 415 struct ata_device *ata_dev; 416 417 ata_for_each_dev(ata_dev, link, ALL) { 418 ata_tdev_delete(ata_dev); 419 } 420 421 transport_remove_device(dev); 422 device_del(dev); 423 transport_destroy_device(dev); 424 put_device(dev); 425 } 426 427 /** 428 * ata_tlink_add -- initialize a transport ATA link structure 429 * @link: allocated ata_link structure. 430 * 431 * Initialize an ATA LINK structure for sysfs. It will be added in the 432 * device tree below the ATA PORT it belongs to. 433 * 434 * Returns %0 on success 435 */ 436 int ata_tlink_add(struct ata_link *link) 437 { 438 struct device *dev = &link->tdev; 439 struct ata_port *ap = link->ap; 440 struct ata_device *ata_dev; 441 int error; 442 443 device_initialize(dev); 444 dev->parent = &ap->tdev; 445 dev->release = ata_tlink_release; 446 if (ata_is_host_link(link)) 447 dev_set_name(dev, "link%d", ap->print_id); 448 else 449 dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp); 450 451 transport_setup_device(dev); 452 453 error = device_add(dev); 454 if (error) { 455 goto tlink_err; 456 } 457 458 transport_add_device(dev); 459 transport_configure_device(dev); 460 461 ata_for_each_dev(ata_dev, link, ALL) { 462 error = ata_tdev_add(ata_dev); 463 if (error) { 464 goto tlink_dev_err; 465 } 466 } 467 return 0; 468 tlink_dev_err: 469 while (--ata_dev >= link->device) { 470 ata_tdev_delete(ata_dev); 471 } 472 transport_remove_device(dev); 473 device_del(dev); 474 tlink_err: 475 transport_destroy_device(dev); 476 put_device(dev); 477 return error; 478 } 479 480 /* 481 * ATA device attributes 482 */ 483 484 #define ata_dev_show_class(title, field) \ 485 static ssize_t \ 486 show_ata_dev_##field(struct device *dev, \ 487 struct device_attribute *attr, char *buf) \ 488 { \ 489 struct ata_device *ata_dev = transport_class_to_dev(dev); \ 490 \ 491 return get_ata_##title##_names(ata_dev->field, buf); \ 492 } 493 494 #define ata_dev_attr(title, field) \ 495 ata_dev_show_class(title, field) \ 496 static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL) 497 498 ata_dev_attr(class, class); 499 ata_dev_attr(xfer, pio_mode); 500 ata_dev_attr(xfer, dma_mode); 501 ata_dev_attr(xfer, xfer_mode); 502 503 504 #define ata_dev_show_simple(field, format_string, cast) \ 505 static ssize_t \ 506 show_ata_dev_##field(struct device *dev, \ 507 struct device_attribute *attr, char *buf) \ 508 { \ 509 struct ata_device *ata_dev = transport_class_to_dev(dev); \ 510 \ 511 return scnprintf(buf, 20, format_string, cast ata_dev->field); \ 512 } 513 514 #define ata_dev_simple_attr(field, format_string, type) \ 515 ata_dev_show_simple(field, format_string, (type)) \ 516 static DEVICE_ATTR(field, S_IRUGO, \ 517 show_ata_dev_##field, NULL) 518 519 ata_dev_simple_attr(spdn_cnt, "%d\n", int); 520 521 struct ata_show_ering_arg { 522 char* buf; 523 int written; 524 }; 525 526 static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg) 527 { 528 struct ata_show_ering_arg* arg = void_arg; 529 u64 seconds; 530 u32 rem; 531 532 seconds = div_u64_rem(ent->timestamp, HZ, &rem); 533 arg->written += sprintf(arg->buf + arg->written, 534 "[%5llu.%09lu]", seconds, 535 rem * NSEC_PER_SEC / HZ); 536 arg->written += get_ata_err_names(ent->err_mask, 537 arg->buf + arg->written); 538 return 0; 539 } 540 541 static ssize_t 542 show_ata_dev_ering(struct device *dev, 543 struct device_attribute *attr, char *buf) 544 { 545 struct ata_device *ata_dev = transport_class_to_dev(dev); 546 struct ata_show_ering_arg arg = { buf, 0 }; 547 548 ata_ering_map(&ata_dev->ering, ata_show_ering, &arg); 549 return arg.written; 550 } 551 552 553 static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL); 554 555 static ssize_t 556 show_ata_dev_id(struct device *dev, 557 struct device_attribute *attr, char *buf) 558 { 559 struct ata_device *ata_dev = transport_class_to_dev(dev); 560 int written = 0, i = 0; 561 562 if (ata_dev->class == ATA_DEV_PMP) 563 return 0; 564 for(i=0;i<ATA_ID_WORDS;i++) { 565 written += scnprintf(buf+written, 20, "%04x%c", 566 ata_dev->id[i], 567 ((i+1) & 7) ? ' ' : '\n'); 568 } 569 return written; 570 } 571 572 static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL); 573 574 static ssize_t 575 show_ata_dev_gscr(struct device *dev, 576 struct device_attribute *attr, char *buf) 577 { 578 struct ata_device *ata_dev = transport_class_to_dev(dev); 579 int written = 0, i = 0; 580 581 if (ata_dev->class != ATA_DEV_PMP) 582 return 0; 583 for(i=0;i<SATA_PMP_GSCR_DWORDS;i++) { 584 written += scnprintf(buf+written, 20, "%08x%c", 585 ata_dev->gscr[i], 586 ((i+1) & 3) ? ' ' : '\n'); 587 } 588 if (SATA_PMP_GSCR_DWORDS & 3) 589 buf[written-1] = '\n'; 590 return written; 591 } 592 593 static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL); 594 595 static ssize_t 596 show_ata_dev_trim(struct device *dev, 597 struct device_attribute *attr, char *buf) 598 { 599 struct ata_device *ata_dev = transport_class_to_dev(dev); 600 unsigned char *mode; 601 602 if (!ata_id_has_trim(ata_dev->id)) 603 mode = "unsupported"; 604 else if (ata_dev->horkage & ATA_HORKAGE_NOTRIM) 605 mode = "forced_unsupported"; 606 else if (ata_dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) 607 mode = "forced_unqueued"; 608 else if (ata_fpdma_dsm_supported(ata_dev)) 609 mode = "queued"; 610 else 611 mode = "unqueued"; 612 613 return scnprintf(buf, 20, "%s\n", mode); 614 } 615 616 static DEVICE_ATTR(trim, S_IRUGO, show_ata_dev_trim, NULL); 617 618 static DECLARE_TRANSPORT_CLASS(ata_dev_class, 619 "ata_device", NULL, NULL, NULL); 620 621 static void ata_tdev_release(struct device *dev) 622 { 623 } 624 625 /** 626 * ata_is_ata_dev -- check if a struct device represents a ATA device 627 * @dev: device to check 628 * 629 * Returns: 630 * %1 if the device represents a ATA device, %0 else 631 */ 632 static int ata_is_ata_dev(const struct device *dev) 633 { 634 return dev->release == ata_tdev_release; 635 } 636 637 static int ata_tdev_match(struct attribute_container *cont, 638 struct device *dev) 639 { 640 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); 641 if (!ata_is_ata_dev(dev)) 642 return 0; 643 return &i->dev_attr_cont.ac == cont; 644 } 645 646 /** 647 * ata_tdev_free -- free a ATA LINK 648 * @dev: ATA PHY to free 649 * 650 * Frees the specified ATA PHY. 651 * 652 * Note: 653 * This function must only be called on a PHY that has not 654 * successfully been added using ata_tdev_add(). 655 */ 656 static void ata_tdev_free(struct ata_device *dev) 657 { 658 transport_destroy_device(&dev->tdev); 659 put_device(&dev->tdev); 660 } 661 662 /** 663 * ata_tdev_delete -- remove ATA device 664 * @ata_dev: ATA device to remove 665 * 666 * Removes the specified ATA device. 667 */ 668 static void ata_tdev_delete(struct ata_device *ata_dev) 669 { 670 struct device *dev = &ata_dev->tdev; 671 672 transport_remove_device(dev); 673 device_del(dev); 674 ata_tdev_free(ata_dev); 675 } 676 677 678 /** 679 * ata_tdev_add -- initialize a transport ATA device structure. 680 * @ata_dev: ata_dev structure. 681 * 682 * Initialize an ATA device structure for sysfs. It will be added in the 683 * device tree below the ATA LINK device it belongs to. 684 * 685 * Returns %0 on success 686 */ 687 static int ata_tdev_add(struct ata_device *ata_dev) 688 { 689 struct device *dev = &ata_dev->tdev; 690 struct ata_link *link = ata_dev->link; 691 struct ata_port *ap = link->ap; 692 int error; 693 694 device_initialize(dev); 695 dev->parent = &link->tdev; 696 dev->release = ata_tdev_release; 697 if (ata_is_host_link(link)) 698 dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno); 699 else 700 dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp); 701 702 transport_setup_device(dev); 703 ata_acpi_bind_dev(ata_dev); 704 error = device_add(dev); 705 if (error) { 706 ata_tdev_free(ata_dev); 707 return error; 708 } 709 710 transport_add_device(dev); 711 transport_configure_device(dev); 712 return 0; 713 } 714 715 716 /* 717 * Setup / Teardown code 718 */ 719 720 #define SETUP_TEMPLATE(attrb, field, perm, test) \ 721 i->private_##attrb[count] = dev_attr_##field; \ 722 i->private_##attrb[count].attr.mode = perm; \ 723 i->attrb[count] = &i->private_##attrb[count]; \ 724 if (test) \ 725 count++ 726 727 #define SETUP_LINK_ATTRIBUTE(field) \ 728 SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1) 729 730 #define SETUP_PORT_ATTRIBUTE(field) \ 731 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1) 732 733 #define SETUP_DEV_ATTRIBUTE(field) \ 734 SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1) 735 736 /** 737 * ata_attach_transport -- instantiate ATA transport template 738 */ 739 struct scsi_transport_template *ata_attach_transport(void) 740 { 741 struct ata_internal *i; 742 int count; 743 744 i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL); 745 if (!i) 746 return NULL; 747 748 i->t.eh_strategy_handler = ata_scsi_error; 749 i->t.user_scan = ata_scsi_user_scan; 750 751 i->t.host_attrs.ac.attrs = &i->port_attrs[0]; 752 i->t.host_attrs.ac.class = &ata_port_class.class; 753 i->t.host_attrs.ac.match = ata_tport_match; 754 transport_container_register(&i->t.host_attrs); 755 756 i->link_attr_cont.ac.class = &ata_link_class.class; 757 i->link_attr_cont.ac.attrs = &i->link_attrs[0]; 758 i->link_attr_cont.ac.match = ata_tlink_match; 759 transport_container_register(&i->link_attr_cont); 760 761 i->dev_attr_cont.ac.class = &ata_dev_class.class; 762 i->dev_attr_cont.ac.attrs = &i->dev_attrs[0]; 763 i->dev_attr_cont.ac.match = ata_tdev_match; 764 transport_container_register(&i->dev_attr_cont); 765 766 count = 0; 767 SETUP_PORT_ATTRIBUTE(nr_pmp_links); 768 SETUP_PORT_ATTRIBUTE(idle_irq); 769 SETUP_PORT_ATTRIBUTE(port_no); 770 BUG_ON(count > ATA_PORT_ATTRS); 771 i->port_attrs[count] = NULL; 772 773 count = 0; 774 SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit); 775 SETUP_LINK_ATTRIBUTE(sata_spd_limit); 776 SETUP_LINK_ATTRIBUTE(sata_spd); 777 BUG_ON(count > ATA_LINK_ATTRS); 778 i->link_attrs[count] = NULL; 779 780 count = 0; 781 SETUP_DEV_ATTRIBUTE(class); 782 SETUP_DEV_ATTRIBUTE(pio_mode); 783 SETUP_DEV_ATTRIBUTE(dma_mode); 784 SETUP_DEV_ATTRIBUTE(xfer_mode); 785 SETUP_DEV_ATTRIBUTE(spdn_cnt); 786 SETUP_DEV_ATTRIBUTE(ering); 787 SETUP_DEV_ATTRIBUTE(id); 788 SETUP_DEV_ATTRIBUTE(gscr); 789 SETUP_DEV_ATTRIBUTE(trim); 790 BUG_ON(count > ATA_DEV_ATTRS); 791 i->dev_attrs[count] = NULL; 792 793 return &i->t; 794 } 795 796 /** 797 * ata_release_transport -- release ATA transport template instance 798 * @t: transport template instance 799 */ 800 void ata_release_transport(struct scsi_transport_template *t) 801 { 802 struct ata_internal *i = to_ata_internal(t); 803 804 transport_container_unregister(&i->t.host_attrs); 805 transport_container_unregister(&i->link_attr_cont); 806 transport_container_unregister(&i->dev_attr_cont); 807 808 kfree(i); 809 } 810 811 __init int libata_transport_init(void) 812 { 813 int error; 814 815 error = transport_class_register(&ata_link_class); 816 if (error) 817 goto out_unregister_transport; 818 error = transport_class_register(&ata_port_class); 819 if (error) 820 goto out_unregister_link; 821 error = transport_class_register(&ata_dev_class); 822 if (error) 823 goto out_unregister_port; 824 return 0; 825 826 out_unregister_port: 827 transport_class_unregister(&ata_port_class); 828 out_unregister_link: 829 transport_class_unregister(&ata_link_class); 830 out_unregister_transport: 831 return error; 832 833 } 834 835 void __exit libata_transport_exit(void) 836 { 837 transport_class_unregister(&ata_link_class); 838 transport_class_unregister(&ata_port_class); 839 transport_class_unregister(&ata_dev_class); 840 } 841