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 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 * ata_port_classify - determine device type based on ATA-spec signature 328 * @ap: ATA port device on which the classification should be run 329 * @tf: ATA taskfile register set for device to be identified 330 * 331 * A wrapper around ata_dev_classify() to provide additional logging 332 * 333 * RETURNS: 334 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP, 335 * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure. 336 */ 337 unsigned int ata_port_classify(struct ata_port *ap, 338 const struct ata_taskfile *tf) 339 { 340 int i; 341 unsigned int class = ata_dev_classify(tf); 342 343 /* Start with index '1' to skip the 'unknown' entry */ 344 for (i = 1; i < ARRAY_SIZE(ata_class_names); i++) { 345 if (ata_class_names[i].value == class) { 346 ata_port_dbg(ap, "found %s device by sig\n", 347 ata_class_names[i].name); 348 return class; 349 } 350 } 351 352 ata_port_info(ap, "found unknown device (class %u)\n", class); 353 return class; 354 } 355 EXPORT_SYMBOL_GPL(ata_port_classify); 356 357 /* 358 * ATA link attributes 359 */ 360 static int noop(int x) { return x; } 361 362 #define ata_link_show_linkspeed(field, format) \ 363 static ssize_t \ 364 show_ata_link_##field(struct device *dev, \ 365 struct device_attribute *attr, char *buf) \ 366 { \ 367 struct ata_link *link = transport_class_to_link(dev); \ 368 \ 369 return sprintf(buf, "%s\n", sata_spd_string(format(link->field))); \ 370 } 371 372 #define ata_link_linkspeed_attr(field, format) \ 373 ata_link_show_linkspeed(field, format) \ 374 static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL) 375 376 ata_link_linkspeed_attr(hw_sata_spd_limit, fls); 377 ata_link_linkspeed_attr(sata_spd_limit, fls); 378 ata_link_linkspeed_attr(sata_spd, noop); 379 380 381 static DECLARE_TRANSPORT_CLASS(ata_link_class, 382 "ata_link", NULL, NULL, NULL); 383 384 static void ata_tlink_release(struct device *dev) 385 { 386 } 387 388 /** 389 * ata_is_link -- check if a struct device represents a ATA link 390 * @dev: device to check 391 * 392 * Returns: 393 * %1 if the device represents a ATA link, %0 else 394 */ 395 static int ata_is_link(const struct device *dev) 396 { 397 return dev->release == ata_tlink_release; 398 } 399 400 static int ata_tlink_match(struct attribute_container *cont, 401 struct device *dev) 402 { 403 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); 404 if (!ata_is_link(dev)) 405 return 0; 406 return &i->link_attr_cont.ac == cont; 407 } 408 409 /** 410 * ata_tlink_delete -- remove ATA LINK 411 * @link: ATA LINK to remove 412 * 413 * Removes the specified ATA LINK. remove associated ATA device(s) as well. 414 */ 415 void ata_tlink_delete(struct ata_link *link) 416 { 417 struct device *dev = &link->tdev; 418 struct ata_device *ata_dev; 419 420 ata_for_each_dev(ata_dev, link, ALL) { 421 ata_tdev_delete(ata_dev); 422 } 423 424 transport_remove_device(dev); 425 device_del(dev); 426 transport_destroy_device(dev); 427 put_device(dev); 428 } 429 430 /** 431 * ata_tlink_add -- initialize a transport ATA link structure 432 * @link: allocated ata_link structure. 433 * 434 * Initialize an ATA LINK structure for sysfs. It will be added in the 435 * device tree below the ATA PORT it belongs to. 436 * 437 * Returns %0 on success 438 */ 439 int ata_tlink_add(struct ata_link *link) 440 { 441 struct device *dev = &link->tdev; 442 struct ata_port *ap = link->ap; 443 struct ata_device *ata_dev; 444 int error; 445 446 device_initialize(dev); 447 dev->parent = &ap->tdev; 448 dev->release = ata_tlink_release; 449 if (ata_is_host_link(link)) 450 dev_set_name(dev, "link%d", ap->print_id); 451 else 452 dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp); 453 454 transport_setup_device(dev); 455 456 error = device_add(dev); 457 if (error) { 458 goto tlink_err; 459 } 460 461 error = transport_add_device(dev); 462 if (error) 463 goto tlink_transport_err; 464 transport_configure_device(dev); 465 466 ata_for_each_dev(ata_dev, link, ALL) { 467 error = ata_tdev_add(ata_dev); 468 if (error) { 469 goto tlink_dev_err; 470 } 471 } 472 return 0; 473 tlink_dev_err: 474 while (--ata_dev >= link->device) { 475 ata_tdev_delete(ata_dev); 476 } 477 transport_remove_device(dev); 478 tlink_transport_err: 479 device_del(dev); 480 tlink_err: 481 transport_destroy_device(dev); 482 put_device(dev); 483 return error; 484 } 485 486 /* 487 * ATA device attributes 488 */ 489 490 #define ata_dev_show_class(title, field) \ 491 static ssize_t \ 492 show_ata_dev_##field(struct device *dev, \ 493 struct device_attribute *attr, char *buf) \ 494 { \ 495 struct ata_device *ata_dev = transport_class_to_dev(dev); \ 496 \ 497 return get_ata_##title##_names(ata_dev->field, buf); \ 498 } 499 500 #define ata_dev_attr(title, field) \ 501 ata_dev_show_class(title, field) \ 502 static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL) 503 504 ata_dev_attr(class, class); 505 ata_dev_attr(xfer, pio_mode); 506 ata_dev_attr(xfer, dma_mode); 507 ata_dev_attr(xfer, xfer_mode); 508 509 510 #define ata_dev_show_simple(field, format_string, cast) \ 511 static ssize_t \ 512 show_ata_dev_##field(struct device *dev, \ 513 struct device_attribute *attr, char *buf) \ 514 { \ 515 struct ata_device *ata_dev = transport_class_to_dev(dev); \ 516 \ 517 return scnprintf(buf, 20, format_string, cast ata_dev->field); \ 518 } 519 520 #define ata_dev_simple_attr(field, format_string, type) \ 521 ata_dev_show_simple(field, format_string, (type)) \ 522 static DEVICE_ATTR(field, S_IRUGO, \ 523 show_ata_dev_##field, NULL) 524 525 ata_dev_simple_attr(spdn_cnt, "%d\n", int); 526 527 struct ata_show_ering_arg { 528 char* buf; 529 int written; 530 }; 531 532 static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg) 533 { 534 struct ata_show_ering_arg* arg = void_arg; 535 u64 seconds; 536 u32 rem; 537 538 seconds = div_u64_rem(ent->timestamp, HZ, &rem); 539 arg->written += sprintf(arg->buf + arg->written, 540 "[%5llu.%09lu]", seconds, 541 rem * NSEC_PER_SEC / HZ); 542 arg->written += get_ata_err_names(ent->err_mask, 543 arg->buf + arg->written); 544 return 0; 545 } 546 547 static ssize_t 548 show_ata_dev_ering(struct device *dev, 549 struct device_attribute *attr, char *buf) 550 { 551 struct ata_device *ata_dev = transport_class_to_dev(dev); 552 struct ata_show_ering_arg arg = { buf, 0 }; 553 554 ata_ering_map(&ata_dev->ering, ata_show_ering, &arg); 555 return arg.written; 556 } 557 558 559 static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL); 560 561 static ssize_t 562 show_ata_dev_id(struct device *dev, 563 struct device_attribute *attr, char *buf) 564 { 565 struct ata_device *ata_dev = transport_class_to_dev(dev); 566 int written = 0, i = 0; 567 568 if (ata_dev->class == ATA_DEV_PMP) 569 return 0; 570 for(i=0;i<ATA_ID_WORDS;i++) { 571 written += scnprintf(buf+written, 20, "%04x%c", 572 ata_dev->id[i], 573 ((i+1) & 7) ? ' ' : '\n'); 574 } 575 return written; 576 } 577 578 static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL); 579 580 static ssize_t 581 show_ata_dev_gscr(struct device *dev, 582 struct device_attribute *attr, char *buf) 583 { 584 struct ata_device *ata_dev = transport_class_to_dev(dev); 585 int written = 0, i = 0; 586 587 if (ata_dev->class != ATA_DEV_PMP) 588 return 0; 589 for(i=0;i<SATA_PMP_GSCR_DWORDS;i++) { 590 written += scnprintf(buf+written, 20, "%08x%c", 591 ata_dev->gscr[i], 592 ((i+1) & 3) ? ' ' : '\n'); 593 } 594 if (SATA_PMP_GSCR_DWORDS & 3) 595 buf[written-1] = '\n'; 596 return written; 597 } 598 599 static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL); 600 601 static ssize_t 602 show_ata_dev_trim(struct device *dev, 603 struct device_attribute *attr, char *buf) 604 { 605 struct ata_device *ata_dev = transport_class_to_dev(dev); 606 unsigned char *mode; 607 608 if (!ata_id_has_trim(ata_dev->id)) 609 mode = "unsupported"; 610 else if (ata_dev->horkage & ATA_HORKAGE_NOTRIM) 611 mode = "forced_unsupported"; 612 else if (ata_dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) 613 mode = "forced_unqueued"; 614 else if (ata_fpdma_dsm_supported(ata_dev)) 615 mode = "queued"; 616 else 617 mode = "unqueued"; 618 619 return scnprintf(buf, 20, "%s\n", mode); 620 } 621 622 static DEVICE_ATTR(trim, S_IRUGO, show_ata_dev_trim, NULL); 623 624 static DECLARE_TRANSPORT_CLASS(ata_dev_class, 625 "ata_device", NULL, NULL, NULL); 626 627 static void ata_tdev_release(struct device *dev) 628 { 629 } 630 631 /** 632 * ata_is_ata_dev -- check if a struct device represents a ATA device 633 * @dev: device to check 634 * 635 * Returns: 636 * %1 if the device represents a ATA device, %0 else 637 */ 638 static int ata_is_ata_dev(const struct device *dev) 639 { 640 return dev->release == ata_tdev_release; 641 } 642 643 static int ata_tdev_match(struct attribute_container *cont, 644 struct device *dev) 645 { 646 struct ata_internal* i = to_ata_internal(ata_scsi_transport_template); 647 if (!ata_is_ata_dev(dev)) 648 return 0; 649 return &i->dev_attr_cont.ac == cont; 650 } 651 652 /** 653 * ata_tdev_free -- free a ATA LINK 654 * @dev: ATA PHY to free 655 * 656 * Frees the specified ATA PHY. 657 * 658 * Note: 659 * This function must only be called on a PHY that has not 660 * successfully been added using ata_tdev_add(). 661 */ 662 static void ata_tdev_free(struct ata_device *dev) 663 { 664 transport_destroy_device(&dev->tdev); 665 put_device(&dev->tdev); 666 } 667 668 /** 669 * ata_tdev_delete -- remove ATA device 670 * @ata_dev: ATA device to remove 671 * 672 * Removes the specified ATA device. 673 */ 674 static void ata_tdev_delete(struct ata_device *ata_dev) 675 { 676 struct device *dev = &ata_dev->tdev; 677 678 transport_remove_device(dev); 679 device_del(dev); 680 ata_tdev_free(ata_dev); 681 } 682 683 684 /** 685 * ata_tdev_add -- initialize a transport ATA device structure. 686 * @ata_dev: ata_dev structure. 687 * 688 * Initialize an ATA device structure for sysfs. It will be added in the 689 * device tree below the ATA LINK device it belongs to. 690 * 691 * Returns %0 on success 692 */ 693 static int ata_tdev_add(struct ata_device *ata_dev) 694 { 695 struct device *dev = &ata_dev->tdev; 696 struct ata_link *link = ata_dev->link; 697 struct ata_port *ap = link->ap; 698 int error; 699 700 device_initialize(dev); 701 dev->parent = &link->tdev; 702 dev->release = ata_tdev_release; 703 if (ata_is_host_link(link)) 704 dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno); 705 else 706 dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp); 707 708 transport_setup_device(dev); 709 ata_acpi_bind_dev(ata_dev); 710 error = device_add(dev); 711 if (error) { 712 ata_tdev_free(ata_dev); 713 return error; 714 } 715 716 error = transport_add_device(dev); 717 if (error) { 718 device_del(dev); 719 ata_tdev_free(ata_dev); 720 return error; 721 } 722 723 transport_configure_device(dev); 724 return 0; 725 } 726 727 728 /* 729 * Setup / Teardown code 730 */ 731 732 #define SETUP_TEMPLATE(attrb, field, perm, test) \ 733 i->private_##attrb[count] = dev_attr_##field; \ 734 i->private_##attrb[count].attr.mode = perm; \ 735 i->attrb[count] = &i->private_##attrb[count]; \ 736 if (test) \ 737 count++ 738 739 #define SETUP_LINK_ATTRIBUTE(field) \ 740 SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1) 741 742 #define SETUP_PORT_ATTRIBUTE(field) \ 743 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1) 744 745 #define SETUP_DEV_ATTRIBUTE(field) \ 746 SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1) 747 748 /** 749 * ata_attach_transport -- instantiate ATA transport template 750 */ 751 struct scsi_transport_template *ata_attach_transport(void) 752 { 753 struct ata_internal *i; 754 int count; 755 756 i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL); 757 if (!i) 758 return NULL; 759 760 i->t.eh_strategy_handler = ata_scsi_error; 761 i->t.user_scan = ata_scsi_user_scan; 762 763 i->t.host_attrs.ac.attrs = &i->port_attrs[0]; 764 i->t.host_attrs.ac.class = &ata_port_class.class; 765 i->t.host_attrs.ac.match = ata_tport_match; 766 transport_container_register(&i->t.host_attrs); 767 768 i->link_attr_cont.ac.class = &ata_link_class.class; 769 i->link_attr_cont.ac.attrs = &i->link_attrs[0]; 770 i->link_attr_cont.ac.match = ata_tlink_match; 771 transport_container_register(&i->link_attr_cont); 772 773 i->dev_attr_cont.ac.class = &ata_dev_class.class; 774 i->dev_attr_cont.ac.attrs = &i->dev_attrs[0]; 775 i->dev_attr_cont.ac.match = ata_tdev_match; 776 transport_container_register(&i->dev_attr_cont); 777 778 count = 0; 779 SETUP_PORT_ATTRIBUTE(nr_pmp_links); 780 SETUP_PORT_ATTRIBUTE(idle_irq); 781 SETUP_PORT_ATTRIBUTE(port_no); 782 BUG_ON(count > ATA_PORT_ATTRS); 783 i->port_attrs[count] = NULL; 784 785 count = 0; 786 SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit); 787 SETUP_LINK_ATTRIBUTE(sata_spd_limit); 788 SETUP_LINK_ATTRIBUTE(sata_spd); 789 BUG_ON(count > ATA_LINK_ATTRS); 790 i->link_attrs[count] = NULL; 791 792 count = 0; 793 SETUP_DEV_ATTRIBUTE(class); 794 SETUP_DEV_ATTRIBUTE(pio_mode); 795 SETUP_DEV_ATTRIBUTE(dma_mode); 796 SETUP_DEV_ATTRIBUTE(xfer_mode); 797 SETUP_DEV_ATTRIBUTE(spdn_cnt); 798 SETUP_DEV_ATTRIBUTE(ering); 799 SETUP_DEV_ATTRIBUTE(id); 800 SETUP_DEV_ATTRIBUTE(gscr); 801 SETUP_DEV_ATTRIBUTE(trim); 802 BUG_ON(count > ATA_DEV_ATTRS); 803 i->dev_attrs[count] = NULL; 804 805 return &i->t; 806 } 807 808 /** 809 * ata_release_transport -- release ATA transport template instance 810 * @t: transport template instance 811 */ 812 void ata_release_transport(struct scsi_transport_template *t) 813 { 814 struct ata_internal *i = to_ata_internal(t); 815 816 transport_container_unregister(&i->t.host_attrs); 817 transport_container_unregister(&i->link_attr_cont); 818 transport_container_unregister(&i->dev_attr_cont); 819 820 kfree(i); 821 } 822 823 __init int libata_transport_init(void) 824 { 825 int error; 826 827 error = transport_class_register(&ata_link_class); 828 if (error) 829 goto out_unregister_transport; 830 error = transport_class_register(&ata_port_class); 831 if (error) 832 goto out_unregister_link; 833 error = transport_class_register(&ata_dev_class); 834 if (error) 835 goto out_unregister_port; 836 return 0; 837 838 out_unregister_port: 839 transport_class_unregister(&ata_port_class); 840 out_unregister_link: 841 transport_class_unregister(&ata_link_class); 842 out_unregister_transport: 843 return error; 844 845 } 846 847 void __exit libata_transport_exit(void) 848 { 849 transport_class_unregister(&ata_link_class); 850 transport_class_unregister(&ata_port_class); 851 transport_class_unregister(&ata_dev_class); 852 } 853