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_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 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 ata_host_put(ap->host); 321 return error; 322 } 323 324 /** 325 * ata_port_classify - determine device type based on ATA-spec signature 326 * @ap: ATA port device on which the classification should be run 327 * @tf: ATA taskfile register set for device to be identified 328 * 329 * A wrapper around ata_dev_classify() to provide additional logging 330 * 331 * RETURNS: 332 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP, 333 * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure. 334 */ 335 unsigned int ata_port_classify(struct ata_port *ap, 336 const struct ata_taskfile *tf) 337 { 338 int i; 339 unsigned int class = ata_dev_classify(tf); 340 341 /* Start with index '1' to skip the 'unknown' entry */ 342 for (i = 1; i < ARRAY_SIZE(ata_class_names); i++) { 343 if (ata_class_names[i].value == class) { 344 ata_port_dbg(ap, "found %s device by sig\n", 345 ata_class_names[i].name); 346 return class; 347 } 348 } 349 350 ata_port_info(ap, "found unknown device (class %u)\n", class); 351 return class; 352 } 353 EXPORT_SYMBOL_GPL(ata_port_classify); 354 355 /* 356 * ATA link attributes 357 */ 358 static int noop(int x) { return x; } 359 360 #define ata_link_show_linkspeed(field, format) \ 361 static ssize_t \ 362 show_ata_link_##field(struct device *dev, \ 363 struct device_attribute *attr, char *buf) \ 364 { \ 365 struct ata_link *link = transport_class_to_link(dev); \ 366 \ 367 return sprintf(buf, "%s\n", sata_spd_string(format(link->field))); \ 368 } 369 370 #define ata_link_linkspeed_attr(field, format) \ 371 ata_link_show_linkspeed(field, format) \ 372 static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL) 373 374 ata_link_linkspeed_attr(hw_sata_spd_limit, fls); 375 ata_link_linkspeed_attr(sata_spd_limit, fls); 376 ata_link_linkspeed_attr(sata_spd, noop); 377 378 379 static DECLARE_TRANSPORT_CLASS(ata_link_class, 380 "ata_link", NULL, NULL, NULL); 381 382 static void ata_tlink_release(struct device *dev) 383 { 384 } 385 386 /** 387 * ata_is_link -- check if a struct device represents a ATA link 388 * @dev: device to check 389 * 390 * Returns: 391 * %1 if the device represents a ATA link, %0 else 392 */ 393 static int ata_is_link(const struct device *dev) 394 { 395 return dev->release == ata_tlink_release; 396 } 397 398 static int ata_tlink_match(struct attribute_container *cont, 399 struct device *dev) 400 { 401 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); 402 if (!ata_is_link(dev)) 403 return 0; 404 return &i->link_attr_cont.ac == cont; 405 } 406 407 /** 408 * ata_tlink_delete -- remove ATA LINK 409 * @link: ATA LINK to remove 410 * 411 * Removes the specified ATA LINK. remove associated ATA device(s) as well. 412 */ 413 void ata_tlink_delete(struct ata_link *link) 414 { 415 struct device *dev = &link->tdev; 416 struct ata_device *ata_dev; 417 418 ata_for_each_dev(ata_dev, link, ALL) { 419 ata_tdev_delete(ata_dev); 420 } 421 422 transport_remove_device(dev); 423 device_del(dev); 424 transport_destroy_device(dev); 425 put_device(dev); 426 } 427 428 /** 429 * ata_tlink_add -- initialize a transport ATA link structure 430 * @link: allocated ata_link structure. 431 * 432 * Initialize an ATA LINK structure for sysfs. It will be added in the 433 * device tree below the ATA PORT it belongs to. 434 * 435 * Returns %0 on success 436 */ 437 int ata_tlink_add(struct ata_link *link) 438 { 439 struct device *dev = &link->tdev; 440 struct ata_port *ap = link->ap; 441 struct ata_device *ata_dev; 442 int error; 443 444 device_initialize(dev); 445 dev->parent = &ap->tdev; 446 dev->release = ata_tlink_release; 447 if (ata_is_host_link(link)) 448 dev_set_name(dev, "link%d", ap->print_id); 449 else 450 dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp); 451 452 transport_setup_device(dev); 453 454 error = device_add(dev); 455 if (error) { 456 goto tlink_err; 457 } 458 459 transport_add_device(dev); 460 transport_configure_device(dev); 461 462 ata_for_each_dev(ata_dev, link, ALL) { 463 error = ata_tdev_add(ata_dev); 464 if (error) { 465 goto tlink_dev_err; 466 } 467 } 468 return 0; 469 tlink_dev_err: 470 while (--ata_dev >= link->device) { 471 ata_tdev_delete(ata_dev); 472 } 473 transport_remove_device(dev); 474 device_del(dev); 475 tlink_err: 476 transport_destroy_device(dev); 477 put_device(dev); 478 return error; 479 } 480 481 /* 482 * ATA device attributes 483 */ 484 485 #define ata_dev_show_class(title, field) \ 486 static ssize_t \ 487 show_ata_dev_##field(struct device *dev, \ 488 struct device_attribute *attr, char *buf) \ 489 { \ 490 struct ata_device *ata_dev = transport_class_to_dev(dev); \ 491 \ 492 return get_ata_##title##_names(ata_dev->field, buf); \ 493 } 494 495 #define ata_dev_attr(title, field) \ 496 ata_dev_show_class(title, field) \ 497 static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL) 498 499 ata_dev_attr(class, class); 500 ata_dev_attr(xfer, pio_mode); 501 ata_dev_attr(xfer, dma_mode); 502 ata_dev_attr(xfer, xfer_mode); 503 504 505 #define ata_dev_show_simple(field, format_string, cast) \ 506 static ssize_t \ 507 show_ata_dev_##field(struct device *dev, \ 508 struct device_attribute *attr, char *buf) \ 509 { \ 510 struct ata_device *ata_dev = transport_class_to_dev(dev); \ 511 \ 512 return scnprintf(buf, 20, format_string, cast ata_dev->field); \ 513 } 514 515 #define ata_dev_simple_attr(field, format_string, type) \ 516 ata_dev_show_simple(field, format_string, (type)) \ 517 static DEVICE_ATTR(field, S_IRUGO, \ 518 show_ata_dev_##field, NULL) 519 520 ata_dev_simple_attr(spdn_cnt, "%d\n", int); 521 522 struct ata_show_ering_arg { 523 char* buf; 524 int written; 525 }; 526 527 static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg) 528 { 529 struct ata_show_ering_arg* arg = void_arg; 530 u64 seconds; 531 u32 rem; 532 533 seconds = div_u64_rem(ent->timestamp, HZ, &rem); 534 arg->written += sprintf(arg->buf + arg->written, 535 "[%5llu.%09lu]", seconds, 536 rem * NSEC_PER_SEC / HZ); 537 arg->written += get_ata_err_names(ent->err_mask, 538 arg->buf + arg->written); 539 return 0; 540 } 541 542 static ssize_t 543 show_ata_dev_ering(struct device *dev, 544 struct device_attribute *attr, char *buf) 545 { 546 struct ata_device *ata_dev = transport_class_to_dev(dev); 547 struct ata_show_ering_arg arg = { buf, 0 }; 548 549 ata_ering_map(&ata_dev->ering, ata_show_ering, &arg); 550 return arg.written; 551 } 552 553 554 static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL); 555 556 static ssize_t 557 show_ata_dev_id(struct device *dev, 558 struct device_attribute *attr, char *buf) 559 { 560 struct ata_device *ata_dev = transport_class_to_dev(dev); 561 int written = 0, i = 0; 562 563 if (ata_dev->class == ATA_DEV_PMP) 564 return 0; 565 for(i=0;i<ATA_ID_WORDS;i++) { 566 written += scnprintf(buf+written, 20, "%04x%c", 567 ata_dev->id[i], 568 ((i+1) & 7) ? ' ' : '\n'); 569 } 570 return written; 571 } 572 573 static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL); 574 575 static ssize_t 576 show_ata_dev_gscr(struct device *dev, 577 struct device_attribute *attr, char *buf) 578 { 579 struct ata_device *ata_dev = transport_class_to_dev(dev); 580 int written = 0, i = 0; 581 582 if (ata_dev->class != ATA_DEV_PMP) 583 return 0; 584 for(i=0;i<SATA_PMP_GSCR_DWORDS;i++) { 585 written += scnprintf(buf+written, 20, "%08x%c", 586 ata_dev->gscr[i], 587 ((i+1) & 3) ? ' ' : '\n'); 588 } 589 if (SATA_PMP_GSCR_DWORDS & 3) 590 buf[written-1] = '\n'; 591 return written; 592 } 593 594 static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL); 595 596 static ssize_t 597 show_ata_dev_trim(struct device *dev, 598 struct device_attribute *attr, char *buf) 599 { 600 struct ata_device *ata_dev = transport_class_to_dev(dev); 601 unsigned char *mode; 602 603 if (!ata_id_has_trim(ata_dev->id)) 604 mode = "unsupported"; 605 else if (ata_dev->horkage & ATA_HORKAGE_NOTRIM) 606 mode = "forced_unsupported"; 607 else if (ata_dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) 608 mode = "forced_unqueued"; 609 else if (ata_fpdma_dsm_supported(ata_dev)) 610 mode = "queued"; 611 else 612 mode = "unqueued"; 613 614 return scnprintf(buf, 20, "%s\n", mode); 615 } 616 617 static DEVICE_ATTR(trim, S_IRUGO, show_ata_dev_trim, NULL); 618 619 static DECLARE_TRANSPORT_CLASS(ata_dev_class, 620 "ata_device", NULL, NULL, NULL); 621 622 static void ata_tdev_release(struct device *dev) 623 { 624 } 625 626 /** 627 * ata_is_ata_dev -- check if a struct device represents a ATA device 628 * @dev: device to check 629 * 630 * Returns: 631 * %1 if the device represents a ATA device, %0 else 632 */ 633 static int ata_is_ata_dev(const struct device *dev) 634 { 635 return dev->release == ata_tdev_release; 636 } 637 638 static int ata_tdev_match(struct attribute_container *cont, 639 struct device *dev) 640 { 641 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); 642 if (!ata_is_ata_dev(dev)) 643 return 0; 644 return &i->dev_attr_cont.ac == cont; 645 } 646 647 /** 648 * ata_tdev_free -- free a ATA LINK 649 * @dev: ATA PHY to free 650 * 651 * Frees the specified ATA PHY. 652 * 653 * Note: 654 * This function must only be called on a PHY that has not 655 * successfully been added using ata_tdev_add(). 656 */ 657 static void ata_tdev_free(struct ata_device *dev) 658 { 659 transport_destroy_device(&dev->tdev); 660 put_device(&dev->tdev); 661 } 662 663 /** 664 * ata_tdev_delete -- remove ATA device 665 * @ata_dev: ATA device to remove 666 * 667 * Removes the specified ATA device. 668 */ 669 static void ata_tdev_delete(struct ata_device *ata_dev) 670 { 671 struct device *dev = &ata_dev->tdev; 672 673 transport_remove_device(dev); 674 device_del(dev); 675 ata_tdev_free(ata_dev); 676 } 677 678 679 /** 680 * ata_tdev_add -- initialize a transport ATA device structure. 681 * @ata_dev: ata_dev structure. 682 * 683 * Initialize an ATA device structure for sysfs. It will be added in the 684 * device tree below the ATA LINK device it belongs to. 685 * 686 * Returns %0 on success 687 */ 688 static int ata_tdev_add(struct ata_device *ata_dev) 689 { 690 struct device *dev = &ata_dev->tdev; 691 struct ata_link *link = ata_dev->link; 692 struct ata_port *ap = link->ap; 693 int error; 694 695 device_initialize(dev); 696 dev->parent = &link->tdev; 697 dev->release = ata_tdev_release; 698 if (ata_is_host_link(link)) 699 dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno); 700 else 701 dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp); 702 703 transport_setup_device(dev); 704 ata_acpi_bind_dev(ata_dev); 705 error = device_add(dev); 706 if (error) { 707 ata_tdev_free(ata_dev); 708 return error; 709 } 710 711 transport_add_device(dev); 712 transport_configure_device(dev); 713 return 0; 714 } 715 716 717 /* 718 * Setup / Teardown code 719 */ 720 721 #define SETUP_TEMPLATE(attrb, field, perm, test) \ 722 i->private_##attrb[count] = dev_attr_##field; \ 723 i->private_##attrb[count].attr.mode = perm; \ 724 i->attrb[count] = &i->private_##attrb[count]; \ 725 if (test) \ 726 count++ 727 728 #define SETUP_LINK_ATTRIBUTE(field) \ 729 SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1) 730 731 #define SETUP_PORT_ATTRIBUTE(field) \ 732 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1) 733 734 #define SETUP_DEV_ATTRIBUTE(field) \ 735 SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1) 736 737 /** 738 * ata_attach_transport -- instantiate ATA transport template 739 */ 740 struct scsi_transport_template *ata_attach_transport(void) 741 { 742 struct ata_internal *i; 743 int count; 744 745 i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL); 746 if (!i) 747 return NULL; 748 749 i->t.eh_strategy_handler = ata_scsi_error; 750 i->t.user_scan = ata_scsi_user_scan; 751 752 i->t.host_attrs.ac.attrs = &i->port_attrs[0]; 753 i->t.host_attrs.ac.class = &ata_port_class.class; 754 i->t.host_attrs.ac.match = ata_tport_match; 755 transport_container_register(&i->t.host_attrs); 756 757 i->link_attr_cont.ac.class = &ata_link_class.class; 758 i->link_attr_cont.ac.attrs = &i->link_attrs[0]; 759 i->link_attr_cont.ac.match = ata_tlink_match; 760 transport_container_register(&i->link_attr_cont); 761 762 i->dev_attr_cont.ac.class = &ata_dev_class.class; 763 i->dev_attr_cont.ac.attrs = &i->dev_attrs[0]; 764 i->dev_attr_cont.ac.match = ata_tdev_match; 765 transport_container_register(&i->dev_attr_cont); 766 767 count = 0; 768 SETUP_PORT_ATTRIBUTE(nr_pmp_links); 769 SETUP_PORT_ATTRIBUTE(idle_irq); 770 SETUP_PORT_ATTRIBUTE(port_no); 771 BUG_ON(count > ATA_PORT_ATTRS); 772 i->port_attrs[count] = NULL; 773 774 count = 0; 775 SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit); 776 SETUP_LINK_ATTRIBUTE(sata_spd_limit); 777 SETUP_LINK_ATTRIBUTE(sata_spd); 778 BUG_ON(count > ATA_LINK_ATTRS); 779 i->link_attrs[count] = NULL; 780 781 count = 0; 782 SETUP_DEV_ATTRIBUTE(class); 783 SETUP_DEV_ATTRIBUTE(pio_mode); 784 SETUP_DEV_ATTRIBUTE(dma_mode); 785 SETUP_DEV_ATTRIBUTE(xfer_mode); 786 SETUP_DEV_ATTRIBUTE(spdn_cnt); 787 SETUP_DEV_ATTRIBUTE(ering); 788 SETUP_DEV_ATTRIBUTE(id); 789 SETUP_DEV_ATTRIBUTE(gscr); 790 SETUP_DEV_ATTRIBUTE(trim); 791 BUG_ON(count > ATA_DEV_ATTRS); 792 i->dev_attrs[count] = NULL; 793 794 return &i->t; 795 } 796 797 /** 798 * ata_release_transport -- release ATA transport template instance 799 * @t: transport template instance 800 */ 801 void ata_release_transport(struct scsi_transport_template *t) 802 { 803 struct ata_internal *i = to_ata_internal(t); 804 805 transport_container_unregister(&i->t.host_attrs); 806 transport_container_unregister(&i->link_attr_cont); 807 transport_container_unregister(&i->dev_attr_cont); 808 809 kfree(i); 810 } 811 812 __init int libata_transport_init(void) 813 { 814 int error; 815 816 error = transport_class_register(&ata_link_class); 817 if (error) 818 goto out_unregister_transport; 819 error = transport_class_register(&ata_port_class); 820 if (error) 821 goto out_unregister_link; 822 error = transport_class_register(&ata_dev_class); 823 if (error) 824 goto out_unregister_port; 825 return 0; 826 827 out_unregister_port: 828 transport_class_unregister(&ata_port_class); 829 out_unregister_link: 830 transport_class_unregister(&ata_link_class); 831 out_unregister_transport: 832 return error; 833 834 } 835 836 void __exit libata_transport_exit(void) 837 { 838 transport_class_unregister(&ata_link_class); 839 transport_class_unregister(&ata_port_class); 840 transport_class_unregister(&ata_dev_class); 841 } 842