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1// SPDX-License-Identifier: GPL-2.0-only2/*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 management10 * interfaces to user-space.11 *12 * There are 3 objects defined in this class:13 * - ata_port14 * - ata_link15 * - ata_device16 * Each port has a link object. Each link can have up to two devices for PATA17 * and generally one for SATA.18 * If there is SATA port multiplier [PMP], 15 additional ata_link object are19 * created.20 *21 * These objects are created when the ata host is initialized and when a PMP is22 * found. They are removed only when the HBA is removed, cleaned before the23 * 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 341#define ATA_LINK_ATTRS 342#define ATA_DEV_ATTRS 943 44struct scsi_transport_template;45struct scsi_transport_template *ata_scsi_transport_template;46 47struct 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 attributes59 * needed by scsi_sysfs.c60 */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 * Hack to allow attributes of the same name in different objects.85 */86#define ATA_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \87 struct device_attribute device_attr_##_prefix##_##_name = \88 __ATTR(_name,_mode,_show,_store)89 90#define ata_bitfield_name_match(title, table) \91static ssize_t \92get_ata_##title##_names(u32 table_key, char *buf) \93{ \94 char *prefix = ""; \95 ssize_t len = 0; \96 int i; \97 \98 for (i = 0; i < ARRAY_SIZE(table); i++) { \99 if (table[i].value & table_key) { \100 len += sprintf(buf + len, "%s%s", \101 prefix, table[i].name); \102 prefix = ", "; \103 } \104 } \105 len += sprintf(buf + len, "\n"); \106 return len; \107}108 109#define ata_bitfield_name_search(title, table) \110static ssize_t \111get_ata_##title##_names(u32 table_key, char *buf) \112{ \113 ssize_t len = 0; \114 int i; \115 \116 for (i = 0; i < ARRAY_SIZE(table); i++) { \117 if (table[i].value == table_key) { \118 len += sprintf(buf + len, "%s", \119 table[i].name); \120 break; \121 } \122 } \123 len += sprintf(buf + len, "\n"); \124 return len; \125}126 127static struct {128 u32 value;129 char *name;130} ata_class_names[] = {131 { ATA_DEV_UNKNOWN, "unknown" },132 { ATA_DEV_ATA, "ata" },133 { ATA_DEV_ATA_UNSUP, "ata" },134 { ATA_DEV_ATAPI, "atapi" },135 { ATA_DEV_ATAPI_UNSUP, "atapi" },136 { ATA_DEV_PMP, "pmp" },137 { ATA_DEV_PMP_UNSUP, "pmp" },138 { ATA_DEV_SEMB, "semb" },139 { ATA_DEV_SEMB_UNSUP, "semb" },140 { ATA_DEV_ZAC, "zac" },141 { ATA_DEV_NONE, "none" }142};143ata_bitfield_name_search(class, ata_class_names)144 145 146static struct {147 u32 value;148 char *name;149} ata_err_names[] = {150 { AC_ERR_DEV, "DeviceError" },151 { AC_ERR_HSM, "HostStateMachineError" },152 { AC_ERR_TIMEOUT, "Timeout" },153 { AC_ERR_MEDIA, "MediaError" },154 { AC_ERR_ATA_BUS, "BusError" },155 { AC_ERR_HOST_BUS, "HostBusError" },156 { AC_ERR_SYSTEM, "SystemError" },157 { AC_ERR_INVALID, "InvalidArg" },158 { AC_ERR_OTHER, "Unknown" },159 { AC_ERR_NODEV_HINT, "NoDeviceHint" },160 { AC_ERR_NCQ, "NCQError" }161};162ata_bitfield_name_match(err, ata_err_names)163 164static struct {165 u32 value;166 char *name;167} ata_xfer_names[] = {168 { XFER_UDMA_7, "XFER_UDMA_7" },169 { XFER_UDMA_6, "XFER_UDMA_6" },170 { XFER_UDMA_5, "XFER_UDMA_5" },171 { XFER_UDMA_4, "XFER_UDMA_4" },172 { XFER_UDMA_3, "XFER_UDMA_3" },173 { XFER_UDMA_2, "XFER_UDMA_2" },174 { XFER_UDMA_1, "XFER_UDMA_1" },175 { XFER_UDMA_0, "XFER_UDMA_0" },176 { XFER_MW_DMA_4, "XFER_MW_DMA_4" },177 { XFER_MW_DMA_3, "XFER_MW_DMA_3" },178 { XFER_MW_DMA_2, "XFER_MW_DMA_2" },179 { XFER_MW_DMA_1, "XFER_MW_DMA_1" },180 { XFER_MW_DMA_0, "XFER_MW_DMA_0" },181 { XFER_SW_DMA_2, "XFER_SW_DMA_2" },182 { XFER_SW_DMA_1, "XFER_SW_DMA_1" },183 { XFER_SW_DMA_0, "XFER_SW_DMA_0" },184 { XFER_PIO_6, "XFER_PIO_6" },185 { XFER_PIO_5, "XFER_PIO_5" },186 { XFER_PIO_4, "XFER_PIO_4" },187 { XFER_PIO_3, "XFER_PIO_3" },188 { XFER_PIO_2, "XFER_PIO_2" },189 { XFER_PIO_1, "XFER_PIO_1" },190 { XFER_PIO_0, "XFER_PIO_0" },191 { XFER_PIO_SLOW, "XFER_PIO_SLOW" }192};193ata_bitfield_name_search(xfer, ata_xfer_names)194 195/*196 * ATA Port attributes197 */198#define ata_port_show_simple(field, name, format_string, cast) \199static ssize_t \200show_ata_port_##name(struct device *dev, \201 struct device_attribute *attr, char *buf) \202{ \203 struct ata_port *ap = transport_class_to_port(dev); \204 \205 return scnprintf(buf, 20, format_string, cast ap->field); \206}207 208#define ata_port_simple_attr(field, name, format_string, type) \209 ata_port_show_simple(field, name, format_string, (type)) \210static DEVICE_ATTR(name, S_IRUGO, show_ata_port_##name, NULL)211 212ata_port_simple_attr(nr_pmp_links, nr_pmp_links, "%d\n", int);213ata_port_simple_attr(stats.idle_irq, idle_irq, "%ld\n", unsigned long);214/* We want the port_no sysfs attibute to start at 1 (ap->port_no starts at 0) */215ata_port_simple_attr(port_no + 1, port_no, "%u\n", unsigned int);216 217static DECLARE_TRANSPORT_CLASS(ata_port_class,218 "ata_port", NULL, NULL, NULL);219 220static void ata_tport_release(struct device *dev)221{222 struct ata_port *ap = tdev_to_port(dev);223 ata_host_put(ap->host);224}225 226/**227 * ata_is_port -- check if a struct device represents a ATA port228 * @dev: device to check229 *230 * Returns:231 * %1 if the device represents a ATA Port, %0 else232 */233static int ata_is_port(const struct device *dev)234{235 return dev->release == ata_tport_release;236}237 238static int ata_tport_match(struct attribute_container *cont,239 struct device *dev)240{241 if (!ata_is_port(dev))242 return 0;243 return &ata_scsi_transport_template->host_attrs.ac == cont;244}245 246/**247 * ata_tport_delete -- remove ATA PORT248 * @ap: ATA PORT to remove249 *250 * Removes the specified ATA PORT. Remove the associated link as well.251 */252void ata_tport_delete(struct ata_port *ap)253{254 struct device *dev = &ap->tdev;255 256 ata_tlink_delete(&ap->link);257 258 transport_remove_device(dev);259 device_del(dev);260 transport_destroy_device(dev);261 put_device(dev);262}263EXPORT_SYMBOL_GPL(ata_tport_delete);264 265static const struct device_type ata_port_sas_type = {266 .name = ATA_PORT_TYPE_NAME,267};268 269/** ata_tport_add - initialize a transport ATA port structure270 *271 * @parent: parent device272 * @ap: existing ata_port structure273 *274 * Initialize a ATA port structure for sysfs. It will be added to the device275 * tree below the device specified by @parent which could be a PCI device.276 *277 * Returns %0 on success278 */279int 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 if (ap->flags & ATA_FLAG_SAS_HOST)287 dev->type = &ata_port_sas_type;288 else289 dev->type = &ata_port_type;290 291 dev->parent = parent;292 ata_host_get(ap->host);293 dev->release = ata_tport_release;294 dev_set_name(dev, "ata%d", ap->print_id);295 transport_setup_device(dev);296 ata_acpi_bind_port(ap);297 error = device_add(dev);298 if (error) {299 goto tport_err;300 }301 302 device_enable_async_suspend(dev);303 pm_runtime_set_active(dev);304 pm_runtime_enable(dev);305 pm_runtime_forbid(dev);306 307 error = transport_add_device(dev);308 if (error)309 goto tport_transport_add_err;310 transport_configure_device(dev);311 312 error = ata_tlink_add(&ap->link);313 if (error) {314 goto tport_link_err;315 }316 return 0;317 318 tport_link_err:319 transport_remove_device(dev);320 tport_transport_add_err:321 device_del(dev);322 323 tport_err:324 transport_destroy_device(dev);325 put_device(dev);326 return error;327}328EXPORT_SYMBOL_GPL(ata_tport_add);329 330/**331 * ata_port_classify - determine device type based on ATA-spec signature332 * @ap: ATA port device on which the classification should be run333 * @tf: ATA taskfile register set for device to be identified334 *335 * A wrapper around ata_dev_classify() to provide additional logging336 *337 * RETURNS:338 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP,339 * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure.340 */341unsigned int ata_port_classify(struct ata_port *ap,342 const struct ata_taskfile *tf)343{344 int i;345 unsigned int class = ata_dev_classify(tf);346 347 /* Start with index '1' to skip the 'unknown' entry */348 for (i = 1; i < ARRAY_SIZE(ata_class_names); i++) {349 if (ata_class_names[i].value == class) {350 ata_port_dbg(ap, "found %s device by sig\n",351 ata_class_names[i].name);352 return class;353 }354 }355 356 ata_port_info(ap, "found unknown device (class %u)\n", class);357 return class;358}359EXPORT_SYMBOL_GPL(ata_port_classify);360 361/*362 * ATA device attributes363 */364 365#define ata_dev_show_class(title, field) \366static ssize_t \367show_ata_dev_##field(struct device *dev, \368 struct device_attribute *attr, char *buf) \369{ \370 struct ata_device *ata_dev = transport_class_to_dev(dev); \371 \372 return get_ata_##title##_names(ata_dev->field, buf); \373}374 375#define ata_dev_attr(title, field) \376 ata_dev_show_class(title, field) \377static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL)378 379ata_dev_attr(class, class);380ata_dev_attr(xfer, pio_mode);381ata_dev_attr(xfer, dma_mode);382ata_dev_attr(xfer, xfer_mode);383 384 385#define ata_dev_show_simple(field, format_string, cast) \386static ssize_t \387show_ata_dev_##field(struct device *dev, \388 struct device_attribute *attr, char *buf) \389{ \390 struct ata_device *ata_dev = transport_class_to_dev(dev); \391 \392 return scnprintf(buf, 20, format_string, cast ata_dev->field); \393}394 395#define ata_dev_simple_attr(field, format_string, type) \396 ata_dev_show_simple(field, format_string, (type)) \397 static DEVICE_ATTR(field, S_IRUGO, \398 show_ata_dev_##field, NULL)399 400ata_dev_simple_attr(spdn_cnt, "%d\n", int);401 402struct ata_show_ering_arg {403 char* buf;404 int written;405};406 407static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg)408{409 struct ata_show_ering_arg* arg = void_arg;410 u64 seconds;411 u32 rem;412 413 seconds = div_u64_rem(ent->timestamp, HZ, &rem);414 arg->written += sprintf(arg->buf + arg->written,415 "[%5llu.%09lu]", seconds,416 rem * NSEC_PER_SEC / HZ);417 arg->written += get_ata_err_names(ent->err_mask,418 arg->buf + arg->written);419 return 0;420}421 422static ssize_t423show_ata_dev_ering(struct device *dev,424 struct device_attribute *attr, char *buf)425{426 struct ata_device *ata_dev = transport_class_to_dev(dev);427 struct ata_show_ering_arg arg = { buf, 0 };428 429 ata_ering_map(&ata_dev->ering, ata_show_ering, &arg);430 return arg.written;431}432 433 434static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL);435 436static ssize_t437show_ata_dev_id(struct device *dev,438 struct device_attribute *attr, char *buf)439{440 struct ata_device *ata_dev = transport_class_to_dev(dev);441 int written = 0, i = 0;442 443 if (ata_dev->class == ATA_DEV_PMP)444 return 0;445 for(i=0;i<ATA_ID_WORDS;i++) {446 written += scnprintf(buf+written, 20, "%04x%c",447 ata_dev->id[i],448 ((i+1) & 7) ? ' ' : '\n');449 }450 return written;451}452 453static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL);454 455static ssize_t456show_ata_dev_gscr(struct device *dev,457 struct device_attribute *attr, char *buf)458{459 struct ata_device *ata_dev = transport_class_to_dev(dev);460 int written = 0, i = 0;461 462 if (ata_dev->class != ATA_DEV_PMP)463 return 0;464 for(i=0;i<SATA_PMP_GSCR_DWORDS;i++) {465 written += scnprintf(buf+written, 20, "%08x%c",466 ata_dev->gscr[i],467 ((i+1) & 3) ? ' ' : '\n');468 }469 if (SATA_PMP_GSCR_DWORDS & 3)470 buf[written-1] = '\n';471 return written;472}473 474static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL);475 476static ssize_t477show_ata_dev_trim(struct device *dev,478 struct device_attribute *attr, char *buf)479{480 struct ata_device *ata_dev = transport_class_to_dev(dev);481 unsigned char *mode;482 483 if (!ata_id_has_trim(ata_dev->id))484 mode = "unsupported";485 else if (ata_dev->quirks & ATA_QUIRK_NOTRIM)486 mode = "forced_unsupported";487 else if (ata_dev->quirks & ATA_QUIRK_NO_NCQ_TRIM)488 mode = "forced_unqueued";489 else if (ata_fpdma_dsm_supported(ata_dev))490 mode = "queued";491 else492 mode = "unqueued";493 494 return scnprintf(buf, 20, "%s\n", mode);495}496 497static DEVICE_ATTR(trim, S_IRUGO, show_ata_dev_trim, NULL);498 499static DECLARE_TRANSPORT_CLASS(ata_dev_class,500 "ata_device", NULL, NULL, NULL);501 502static void ata_tdev_release(struct device *dev)503{504}505 506/**507 * ata_is_ata_dev -- check if a struct device represents a ATA device508 * @dev: device to check509 *510 * Returns:511 * true if the device represents a ATA device, false otherwise512 */513static bool ata_is_ata_dev(const struct device *dev)514{515 return dev->release == ata_tdev_release;516}517 518static int ata_tdev_match(struct attribute_container *cont,519 struct device *dev)520{521 struct ata_internal *i = to_ata_internal(ata_scsi_transport_template);522 523 if (!ata_is_ata_dev(dev))524 return 0;525 return &i->dev_attr_cont.ac == cont;526}527 528/**529 * ata_tdev_free -- free an ATA transport device530 * @dev: struct ata_device owning the transport device to free531 *532 * Free the ATA transport device for the specified ATA device.533 *534 * Note:535 * This function must only be called for a ATA transport device that has not536 * yet successfully been added using ata_tdev_add().537 */538static void ata_tdev_free(struct ata_device *dev)539{540 transport_destroy_device(&dev->tdev);541 put_device(&dev->tdev);542}543 544/**545 * ata_tdev_delete -- remove an ATA transport device546 * @ata_dev: struct ata_device owning the transport device to delete547 *548 * Removes the ATA transport device for the specified ATA device.549 */550static void ata_tdev_delete(struct ata_device *ata_dev)551{552 struct device *dev = &ata_dev->tdev;553 554 transport_remove_device(dev);555 device_del(dev);556 ata_tdev_free(ata_dev);557}558 559/**560 * ata_tdev_add -- initialize an ATA transport device561 * @ata_dev: struct ata_device owning the transport device to add562 *563 * Initialize an ATA transport device for sysfs. It will be added in the564 * device tree below the ATA link device it belongs to.565 *566 * Returns %0 on success and a negative error code on error.567 */568static int ata_tdev_add(struct ata_device *ata_dev)569{570 struct device *dev = &ata_dev->tdev;571 struct ata_link *link = ata_dev->link;572 struct ata_port *ap = link->ap;573 int error;574 575 device_initialize(dev);576 dev->parent = &link->tdev;577 dev->release = ata_tdev_release;578 if (ata_is_host_link(link))579 dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno);580 else581 dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp);582 583 transport_setup_device(dev);584 ata_acpi_bind_dev(ata_dev);585 error = device_add(dev);586 if (error) {587 ata_tdev_free(ata_dev);588 return error;589 }590 591 error = transport_add_device(dev);592 if (error) {593 device_del(dev);594 ata_tdev_free(ata_dev);595 return error;596 }597 598 transport_configure_device(dev);599 return 0;600}601 602/*603 * ATA link attributes604 */605static int noop(int x)606{607 return x;608}609 610#define ata_link_show_linkspeed(field, format) \611static ssize_t \612show_ata_link_##field(struct device *dev, \613 struct device_attribute *attr, char *buf) \614{ \615 struct ata_link *link = transport_class_to_link(dev); \616 \617 return sprintf(buf, "%s\n", \618 sata_spd_string(format(link->field))); \619}620 621#define ata_link_linkspeed_attr(field, format) \622 ata_link_show_linkspeed(field, format) \623static DEVICE_ATTR(field, 0444, show_ata_link_##field, NULL)624 625ata_link_linkspeed_attr(hw_sata_spd_limit, fls);626ata_link_linkspeed_attr(sata_spd_limit, fls);627ata_link_linkspeed_attr(sata_spd, noop);628 629static DECLARE_TRANSPORT_CLASS(ata_link_class,630 "ata_link", NULL, NULL, NULL);631 632static void ata_tlink_release(struct device *dev)633{634}635 636/**637 * ata_is_link -- check if a struct device represents a ATA link638 * @dev: device to check639 *640 * Returns:641 * true if the device represents a ATA link, false otherwise642 */643static bool ata_is_link(const struct device *dev)644{645 return dev->release == ata_tlink_release;646}647 648static int ata_tlink_match(struct attribute_container *cont,649 struct device *dev)650{651 struct ata_internal *i = to_ata_internal(ata_scsi_transport_template);652 653 if (!ata_is_link(dev))654 return 0;655 return &i->link_attr_cont.ac == cont;656}657 658/**659 * ata_tlink_delete -- remove an ATA link transport device660 * @link: struct ata_link owning the link transport device to remove661 *662 * Removes the link transport device of the specified ATA link. This also663 * removes the ATA device(s) associated with the link as well.664 */665void ata_tlink_delete(struct ata_link *link)666{667 struct device *dev = &link->tdev;668 struct ata_device *ata_dev;669 670 ata_for_each_dev(ata_dev, link, ALL) {671 ata_tdev_delete(ata_dev);672 }673 674 transport_remove_device(dev);675 device_del(dev);676 transport_destroy_device(dev);677 put_device(dev);678}679 680/**681 * ata_tlink_add -- initialize an ATA link transport device682 * @link: struct ata_link owning the link transport device to initialize683 *684 * Initialize an ATA link transport device for sysfs. It will be added in the685 * device tree below the ATA port it belongs to.686 *687 * Returns %0 on success and a negative error code on error.688 */689int ata_tlink_add(struct ata_link *link)690{691 struct device *dev = &link->tdev;692 struct ata_port *ap = link->ap;693 struct ata_device *ata_dev;694 int error;695 696 device_initialize(dev);697 dev->parent = &ap->tdev;698 dev->release = ata_tlink_release;699 if (ata_is_host_link(link))700 dev_set_name(dev, "link%d", ap->print_id);701 else702 dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp);703 704 transport_setup_device(dev);705 706 error = device_add(dev);707 if (error)708 goto tlink_err;709 710 error = transport_add_device(dev);711 if (error)712 goto tlink_transport_err;713 transport_configure_device(dev);714 715 ata_for_each_dev(ata_dev, link, ALL) {716 error = ata_tdev_add(ata_dev);717 if (error)718 goto tlink_dev_err;719 }720 return 0;721 tlink_dev_err:722 while (--ata_dev >= link->device)723 ata_tdev_delete(ata_dev);724 transport_remove_device(dev);725 tlink_transport_err:726 device_del(dev);727 tlink_err:728 transport_destroy_device(dev);729 put_device(dev);730 return error;731}732 733/*734 * Setup / Teardown code735 */736 737#define SETUP_TEMPLATE(attrb, field, perm, test) \738 i->private_##attrb[count] = dev_attr_##field; \739 i->private_##attrb[count].attr.mode = perm; \740 i->attrb[count] = &i->private_##attrb[count]; \741 if (test) \742 count++743 744#define SETUP_LINK_ATTRIBUTE(field) \745 SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1)746 747#define SETUP_PORT_ATTRIBUTE(field) \748 SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)749 750#define SETUP_DEV_ATTRIBUTE(field) \751 SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1)752 753/**754 * ata_attach_transport -- instantiate ATA transport template755 */756struct scsi_transport_template *ata_attach_transport(void)757{758 struct ata_internal *i;759 int count;760 761 i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL);762 if (!i)763 return NULL;764 765 i->t.eh_strategy_handler = ata_scsi_error;766 i->t.user_scan = ata_scsi_user_scan;767 768 i->t.host_attrs.ac.attrs = &i->port_attrs[0];769 i->t.host_attrs.ac.class = &ata_port_class.class;770 i->t.host_attrs.ac.match = ata_tport_match;771 transport_container_register(&i->t.host_attrs);772 773 i->link_attr_cont.ac.class = &ata_link_class.class;774 i->link_attr_cont.ac.attrs = &i->link_attrs[0];775 i->link_attr_cont.ac.match = ata_tlink_match;776 transport_container_register(&i->link_attr_cont);777 778 i->dev_attr_cont.ac.class = &ata_dev_class.class;779 i->dev_attr_cont.ac.attrs = &i->dev_attrs[0];780 i->dev_attr_cont.ac.match = ata_tdev_match;781 transport_container_register(&i->dev_attr_cont);782 783 count = 0;784 SETUP_PORT_ATTRIBUTE(nr_pmp_links);785 SETUP_PORT_ATTRIBUTE(idle_irq);786 SETUP_PORT_ATTRIBUTE(port_no);787 BUG_ON(count > ATA_PORT_ATTRS);788 i->port_attrs[count] = NULL;789 790 count = 0;791 SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit);792 SETUP_LINK_ATTRIBUTE(sata_spd_limit);793 SETUP_LINK_ATTRIBUTE(sata_spd);794 BUG_ON(count > ATA_LINK_ATTRS);795 i->link_attrs[count] = NULL;796 797 count = 0;798 SETUP_DEV_ATTRIBUTE(class);799 SETUP_DEV_ATTRIBUTE(pio_mode);800 SETUP_DEV_ATTRIBUTE(dma_mode);801 SETUP_DEV_ATTRIBUTE(xfer_mode);802 SETUP_DEV_ATTRIBUTE(spdn_cnt);803 SETUP_DEV_ATTRIBUTE(ering);804 SETUP_DEV_ATTRIBUTE(id);805 SETUP_DEV_ATTRIBUTE(gscr);806 SETUP_DEV_ATTRIBUTE(trim);807 BUG_ON(count > ATA_DEV_ATTRS);808 i->dev_attrs[count] = NULL;809 810 return &i->t;811}812 813/**814 * ata_release_transport -- release ATA transport template instance815 * @t: transport template instance816 */817void ata_release_transport(struct scsi_transport_template *t)818{819 struct ata_internal *i = to_ata_internal(t);820 821 transport_container_unregister(&i->t.host_attrs);822 transport_container_unregister(&i->link_attr_cont);823 transport_container_unregister(&i->dev_attr_cont);824 825 kfree(i);826}827 828__init int libata_transport_init(void)829{830 int error;831 832 error = transport_class_register(&ata_link_class);833 if (error)834 goto out_unregister_transport;835 error = transport_class_register(&ata_port_class);836 if (error)837 goto out_unregister_link;838 error = transport_class_register(&ata_dev_class);839 if (error)840 goto out_unregister_port;841 return 0;842 843 out_unregister_port:844 transport_class_unregister(&ata_port_class);845 out_unregister_link:846 transport_class_unregister(&ata_link_class);847 out_unregister_transport:848 return error;849 850}851 852void __exit libata_transport_exit(void)853{854 transport_class_unregister(&ata_link_class);855 transport_class_unregister(&ata_port_class);856 transport_class_unregister(&ata_dev_class);857}858