1/*
   2 * Copyright (C) 2005-2006 Dell Inc.
   3 *	Released under GPL v2.
   4 *
   5 * Serial Attached SCSI (SAS) transport class.
   6 *
   7 * The SAS transport class contains common code to deal with SAS HBAs,
   8 * an aproximated representation of SAS topologies in the driver model,
   9 * and various sysfs attributes to expose these topologies and management
  10 * interfaces to userspace.
  11 *
  12 * In addition to the basic SCSI core objects this transport class
  13 * introduces two additional intermediate objects:  The SAS PHY
  14 * as represented by struct sas_phy defines an "outgoing" PHY on
  15 * a SAS HBA or Expander, and the SAS remote PHY represented by
  16 * struct sas_rphy defines an "incoming" PHY on a SAS Expander or
  17 * end device.  Note that this is purely a software concept, the
  18 * underlying hardware for a PHY and a remote PHY is the exactly
  19 * the same.
  20 *
  21 * There is no concept of a SAS port in this code, users can see
  22 * what PHYs form a wide port based on the port_identifier attribute,
  23 * which is the same for all PHYs in a port.
  24 */
  25
  26#include <linux/init.h>
  27#include <linux/module.h>
  28#include <linux/jiffies.h>
  29#include <linux/err.h>
  30#include <linux/slab.h>
  31#include <linux/string.h>
  32#include <linux/blkdev.h>
  33#include <linux/bsg.h>
  34
  35#include <scsi/scsi.h>
  36#include <scsi/scsi_device.h>
  37#include <scsi/scsi_host.h>
  38#include <scsi/scsi_transport.h>
  39#include <scsi/scsi_transport_sas.h>
  40
  41#include "scsi_sas_internal.h"
  42struct sas_host_attrs {
  43	struct list_head rphy_list;
  44	struct mutex lock;
  45	struct request_queue *q;
  46	u32 next_target_id;
  47	u32 next_expander_id;
  48	int next_port_id;
  49};
  50#define to_sas_host_attrs(host)	((struct sas_host_attrs *)(host)->shost_data)
  51
  52
  53/*
  54 * Hack to allow attributes of the same name in different objects.
  55 */
  56#define SAS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
  57	struct device_attribute dev_attr_##_prefix##_##_name = \
  58	__ATTR(_name,_mode,_show,_store)
  59
  60
  61/*
  62 * Pretty printing helpers
  63 */
  64
  65#define sas_bitfield_name_match(title, table)			\
  66static ssize_t							\
  67get_sas_##title##_names(u32 table_key, char *buf)		\
  68{								\
  69	char *prefix = "";					\
  70	ssize_t len = 0;					\
  71	int i;							\
  72								\
  73	for (i = 0; i < ARRAY_SIZE(table); i++) {		\
  74		if (table[i].value & table_key) {		\
  75			len += sprintf(buf + len, "%s%s",	\
  76				prefix, table[i].name);		\
  77			prefix = ", ";				\
  78		}						\
  79	}							\
  80	len += sprintf(buf + len, "\n");			\
  81	return len;						\
  82}
  83
  84#define sas_bitfield_name_set(title, table)			\
  85static ssize_t							\
  86set_sas_##title##_names(u32 *table_key, const char *buf)	\
  87{								\
  88	ssize_t len = 0;					\
  89	int i;							\
  90								\
  91	for (i = 0; i < ARRAY_SIZE(table); i++) {		\
  92		len = strlen(table[i].name);			\
  93		if (strncmp(buf, table[i].name, len) == 0 &&	\
  94		    (buf[len] == '\n' || buf[len] == '\0')) {	\
  95			*table_key = table[i].value;		\
  96			return 0;				\
  97		}						\
  98	}							\
  99	return -EINVAL;						\
 100}
 101
 102#define sas_bitfield_name_search(title, table)			\
 103static ssize_t							\
 104get_sas_##title##_names(u32 table_key, char *buf)		\
 105{								\
 106	ssize_t len = 0;					\
 107	int i;							\
 108								\
 109	for (i = 0; i < ARRAY_SIZE(table); i++) {		\
 110		if (table[i].value == table_key) {		\
 111			len += sprintf(buf + len, "%s",		\
 112				table[i].name);			\
 113			break;					\
 114		}						\
 115	}							\
 116	len += sprintf(buf + len, "\n");			\
 117	return len;						\
 118}
 119
 120static struct {
 121	u32		value;
 122	char		*name;
 123} sas_device_type_names[] = {
 124	{ SAS_PHY_UNUSED,		"unused" },
 125	{ SAS_END_DEVICE,		"end device" },
 126	{ SAS_EDGE_EXPANDER_DEVICE,	"edge expander" },
 127	{ SAS_FANOUT_EXPANDER_DEVICE,	"fanout expander" },
 128};
 129sas_bitfield_name_search(device_type, sas_device_type_names)
 130
 131
 132static struct {
 133	u32		value;
 134	char		*name;
 135} sas_protocol_names[] = {
 136	{ SAS_PROTOCOL_SATA,		"sata" },
 137	{ SAS_PROTOCOL_SMP,		"smp" },
 138	{ SAS_PROTOCOL_STP,		"stp" },
 139	{ SAS_PROTOCOL_SSP,		"ssp" },
 140};
 141sas_bitfield_name_match(protocol, sas_protocol_names)
 142
 143static struct {
 144	u32		value;
 145	char		*name;
 146} sas_linkspeed_names[] = {
 147	{ SAS_LINK_RATE_UNKNOWN,	"Unknown" },
 148	{ SAS_PHY_DISABLED,		"Phy disabled" },
 149	{ SAS_LINK_RATE_FAILED,		"Link Rate failed" },
 150	{ SAS_SATA_SPINUP_HOLD,		"Spin-up hold" },
 151	{ SAS_LINK_RATE_1_5_GBPS,	"1.5 Gbit" },
 152	{ SAS_LINK_RATE_3_0_GBPS,	"3.0 Gbit" },
 153	{ SAS_LINK_RATE_6_0_GBPS,	"6.0 Gbit" },
 154	{ SAS_LINK_RATE_12_0_GBPS,	"12.0 Gbit" },
 155};
 156sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
 157sas_bitfield_name_set(linkspeed, sas_linkspeed_names)
 158
 159static struct sas_end_device *sas_sdev_to_rdev(struct scsi_device *sdev)
 160{
 161	struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
 162	struct sas_end_device *rdev;
 163
 164	BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
 165
 166	rdev = rphy_to_end_device(rphy);
 167	return rdev;
 168}
 169
 170static void sas_smp_request(struct request_queue *q, struct Scsi_Host *shost,
 171			    struct sas_rphy *rphy)
 172{
 173	struct request *req;
 174	int ret;
 175	int (*handler)(struct Scsi_Host *, struct sas_rphy *, struct request *);
 176
 177	while ((req = blk_fetch_request(q)) != NULL) {
 178		spin_unlock_irq(q->queue_lock);
 179
 180		handler = to_sas_internal(shost->transportt)->f->smp_handler;
 181		ret = handler(shost, rphy, req);
 182		req->errors = ret;
 183
 184		blk_end_request_all(req, ret);
 185
 186		spin_lock_irq(q->queue_lock);
 187	}
 188}
 189
 190static void sas_host_smp_request(struct request_queue *q)
 191{
 192	sas_smp_request(q, (struct Scsi_Host *)q->queuedata, NULL);
 193}
 194
 195static void sas_non_host_smp_request(struct request_queue *q)
 196{
 197	struct sas_rphy *rphy = q->queuedata;
 198	sas_smp_request(q, rphy_to_shost(rphy), rphy);
 199}
 200
 201static void sas_host_release(struct device *dev)
 202{
 203	struct Scsi_Host *shost = dev_to_shost(dev);
 204	struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 205	struct request_queue *q = sas_host->q;
 206
 207	if (q)
 208		blk_cleanup_queue(q);
 209}
 210
 211static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
 212{
 213	struct request_queue *q;
 214	int error;
 215	struct device *dev;
 216	char namebuf[20];
 217	const char *name;
 218	void (*release)(struct device *);
 219
 220	if (!to_sas_internal(shost->transportt)->f->smp_handler) {
 221		printk("%s can't handle SMP requests\n", shost->hostt->name);
 222		return 0;
 223	}
 224
 225	if (rphy) {
 226		q = blk_init_queue(sas_non_host_smp_request, NULL);
 227		dev = &rphy->dev;
 228		name = dev_name(dev);
 229		release = NULL;
 230	} else {
 231		q = blk_init_queue(sas_host_smp_request, NULL);
 232		dev = &shost->shost_gendev;
 233		snprintf(namebuf, sizeof(namebuf),
 234			 "sas_host%d", shost->host_no);
 235		name = namebuf;
 236		release = sas_host_release;
 237	}
 238	if (!q)
 239		return -ENOMEM;
 240
 241	error = bsg_register_queue(q, dev, name, release);
 242	if (error) {
 243		blk_cleanup_queue(q);
 244		return -ENOMEM;
 245	}
 246
 247	if (rphy)
 248		rphy->q = q;
 249	else
 250		to_sas_host_attrs(shost)->q = q;
 251
 252	if (rphy)
 253		q->queuedata = rphy;
 254	else
 255		q->queuedata = shost;
 256
 257	queue_flag_set_unlocked(QUEUE_FLAG_BIDI, q);
 258	return 0;
 259}
 260
 261static void sas_bsg_remove(struct Scsi_Host *shost, struct sas_rphy *rphy)
 262{
 263	struct request_queue *q;
 264
 265	if (rphy)
 266		q = rphy->q;
 267	else
 268		q = to_sas_host_attrs(shost)->q;
 269
 270	if (!q)
 271		return;
 272
 273	bsg_unregister_queue(q);
 274}
 275
 276/*
 277 * SAS host attributes
 278 */
 279
 280static int sas_host_setup(struct transport_container *tc, struct device *dev,
 281			  struct device *cdev)
 282{
 283	struct Scsi_Host *shost = dev_to_shost(dev);
 284	struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 285
 286	INIT_LIST_HEAD(&sas_host->rphy_list);
 287	mutex_init(&sas_host->lock);
 288	sas_host->next_target_id = 0;
 289	sas_host->next_expander_id = 0;
 290	sas_host->next_port_id = 0;
 291
 292	if (sas_bsg_initialize(shost, NULL))
 293		dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n",
 294			   shost->host_no);
 295
 296	return 0;
 297}
 298
 299static int sas_host_remove(struct transport_container *tc, struct device *dev,
 300			   struct device *cdev)
 301{
 302	struct Scsi_Host *shost = dev_to_shost(dev);
 303
 304	sas_bsg_remove(shost, NULL);
 305
 306	return 0;
 307}
 308
 309static DECLARE_TRANSPORT_CLASS(sas_host_class,
 310		"sas_host", sas_host_setup, sas_host_remove, NULL);
 311
 312static int sas_host_match(struct attribute_container *cont,
 313			    struct device *dev)
 314{
 315	struct Scsi_Host *shost;
 316	struct sas_internal *i;
 317
 318	if (!scsi_is_host_device(dev))
 319		return 0;
 320	shost = dev_to_shost(dev);
 321
 322	if (!shost->transportt)
 323		return 0;
 324	if (shost->transportt->host_attrs.ac.class !=
 325			&sas_host_class.class)
 326		return 0;
 327
 328	i = to_sas_internal(shost->transportt);
 329	return &i->t.host_attrs.ac == cont;
 330}
 331
 332static int do_sas_phy_delete(struct device *dev, void *data)
 333{
 334	int pass = (int)(unsigned long)data;
 335
 336	if (pass == 0 && scsi_is_sas_port(dev))
 337		sas_port_delete(dev_to_sas_port(dev));
 338	else if (pass == 1 && scsi_is_sas_phy(dev))
 339		sas_phy_delete(dev_to_phy(dev));
 340	return 0;
 341}
 342
 343/**
 344 * sas_remove_children  -  tear down a devices SAS data structures
 345 * @dev:	device belonging to the sas object
 346 *
 347 * Removes all SAS PHYs and remote PHYs for a given object
 348 */
 349void sas_remove_children(struct device *dev)
 350{
 351	device_for_each_child(dev, (void *)0, do_sas_phy_delete);
 352	device_for_each_child(dev, (void *)1, do_sas_phy_delete);
 353}
 354EXPORT_SYMBOL(sas_remove_children);
 355
 356/**
 357 * sas_remove_host  -  tear down a Scsi_Host's SAS data structures
 358 * @shost:	Scsi Host that is torn down
 359 *
 360 * Removes all SAS PHYs and remote PHYs for a given Scsi_Host.
 361 * Must be called just before scsi_remove_host for SAS HBAs.
 362 */
 363void sas_remove_host(struct Scsi_Host *shost)
 364{
 365	sas_remove_children(&shost->shost_gendev);
 366}
 367EXPORT_SYMBOL(sas_remove_host);
 368
 369/**
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 370 * sas_tlr_supported - checking TLR bit in vpd 0x90
 371 * @sdev: scsi device struct
 372 *
 373 * Check Transport Layer Retries are supported or not.
 374 * If vpd page 0x90 is present, TRL is supported.
 375 *
 376 */
 377unsigned int
 378sas_tlr_supported(struct scsi_device *sdev)
 379{
 380	const int vpd_len = 32;
 381	struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 382	char *buffer = kzalloc(vpd_len, GFP_KERNEL);
 383	int ret = 0;
 384
 385	if (scsi_get_vpd_page(sdev, 0x90, buffer, vpd_len))
 386		goto out;
 387
 388	/*
 389	 * Magic numbers: the VPD Protocol page (0x90)
 390	 * has a 4 byte header and then one entry per device port
 391	 * the TLR bit is at offset 8 on each port entry
 392	 * if we take the first port, that's at total offset 12
 393	 */
 394	ret = buffer[12] & 0x01;
 395
 396 out:
 397	kfree(buffer);
 398	rdev->tlr_supported = ret;
 399	return ret;
 400
 401}
 402EXPORT_SYMBOL_GPL(sas_tlr_supported);
 403
 404/**
 405 * sas_disable_tlr - setting TLR flags
 406 * @sdev: scsi device struct
 407 *
 408 * Seting tlr_enabled flag to 0.
 409 *
 410 */
 411void
 412sas_disable_tlr(struct scsi_device *sdev)
 413{
 414	struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 415
 416	rdev->tlr_enabled = 0;
 417}
 418EXPORT_SYMBOL_GPL(sas_disable_tlr);
 419
 420/**
 421 * sas_enable_tlr - setting TLR flags
 422 * @sdev: scsi device struct
 423 *
 424 * Seting tlr_enabled flag 1.
 425 *
 426 */
 427void sas_enable_tlr(struct scsi_device *sdev)
 428{
 429	unsigned int tlr_supported = 0;
 430	tlr_supported  = sas_tlr_supported(sdev);
 431
 432	if (tlr_supported) {
 433		struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 434
 435		rdev->tlr_enabled = 1;
 436	}
 437
 438	return;
 439}
 440EXPORT_SYMBOL_GPL(sas_enable_tlr);
 441
 442unsigned int sas_is_tlr_enabled(struct scsi_device *sdev)
 443{
 444	struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
 445	return rdev->tlr_enabled;
 446}
 447EXPORT_SYMBOL_GPL(sas_is_tlr_enabled);
 448
 449/*
 450 * SAS Phy attributes
 451 */
 452
 453#define sas_phy_show_simple(field, name, format_string, cast)		\
 454static ssize_t								\
 455show_sas_phy_##name(struct device *dev, 				\
 456		    struct device_attribute *attr, char *buf)		\
 457{									\
 458	struct sas_phy *phy = transport_class_to_phy(dev);		\
 459									\
 460	return snprintf(buf, 20, format_string, cast phy->field);	\
 461}
 462
 463#define sas_phy_simple_attr(field, name, format_string, type)		\
 464	sas_phy_show_simple(field, name, format_string, (type))	\
 465static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 466
 467#define sas_phy_show_protocol(field, name)				\
 468static ssize_t								\
 469show_sas_phy_##name(struct device *dev, 				\
 470		    struct device_attribute *attr, char *buf)		\
 471{									\
 472	struct sas_phy *phy = transport_class_to_phy(dev);		\
 473									\
 474	if (!phy->field)						\
 475		return snprintf(buf, 20, "none\n");			\
 476	return get_sas_protocol_names(phy->field, buf);		\
 477}
 478
 479#define sas_phy_protocol_attr(field, name)				\
 480	sas_phy_show_protocol(field, name)				\
 481static DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
 482
 483#define sas_phy_show_linkspeed(field)					\
 484static ssize_t								\
 485show_sas_phy_##field(struct device *dev, 				\
 486		     struct device_attribute *attr, char *buf)		\
 487{									\
 488	struct sas_phy *phy = transport_class_to_phy(dev);		\
 489									\
 490	return get_sas_linkspeed_names(phy->field, buf);		\
 491}
 492
 493/* Fudge to tell if we're minimum or maximum */
 494#define sas_phy_store_linkspeed(field)					\
 495static ssize_t								\
 496store_sas_phy_##field(struct device *dev, 				\
 497		      struct device_attribute *attr, 			\
 498		      const char *buf,	size_t count)			\
 499{									\
 500	struct sas_phy *phy = transport_class_to_phy(dev);		\
 501	struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);	\
 502	struct sas_internal *i = to_sas_internal(shost->transportt);	\
 503	u32 value;							\
 504	struct sas_phy_linkrates rates = {0};				\
 505	int error;							\
 506									\
 507	error = set_sas_linkspeed_names(&value, buf);			\
 508	if (error)							\
 509		return error;						\
 510	rates.field = value;						\
 511	error = i->f->set_phy_speed(phy, &rates);			\
 512									\
 513	return error ? error : count;					\
 514}
 515
 516#define sas_phy_linkspeed_rw_attr(field)				\
 517	sas_phy_show_linkspeed(field)					\
 518	sas_phy_store_linkspeed(field)					\
 519static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field,		\
 520	store_sas_phy_##field)
 521
 522#define sas_phy_linkspeed_attr(field)					\
 523	sas_phy_show_linkspeed(field)					\
 524static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 525
 526
 527#define sas_phy_show_linkerror(field)					\
 528static ssize_t								\
 529show_sas_phy_##field(struct device *dev, 				\
 530		     struct device_attribute *attr, char *buf)		\
 531{									\
 532	struct sas_phy *phy = transport_class_to_phy(dev);		\
 533	struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);	\
 534	struct sas_internal *i = to_sas_internal(shost->transportt);	\
 535	int error;							\
 536									\
 537	error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0;	\
 538	if (error)							\
 539		return error;						\
 540	return snprintf(buf, 20, "%u\n", phy->field);			\
 541}
 542
 543#define sas_phy_linkerror_attr(field)					\
 544	sas_phy_show_linkerror(field)					\
 545static DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
 546
 547
 548static ssize_t
 549show_sas_device_type(struct device *dev,
 550		     struct device_attribute *attr, char *buf)
 551{
 552	struct sas_phy *phy = transport_class_to_phy(dev);
 553
 554	if (!phy->identify.device_type)
 555		return snprintf(buf, 20, "none\n");
 556	return get_sas_device_type_names(phy->identify.device_type, buf);
 557}
 558static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
 559
 560static ssize_t do_sas_phy_enable(struct device *dev,
 561		size_t count, int enable)
 562{
 563	struct sas_phy *phy = transport_class_to_phy(dev);
 564	struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 565	struct sas_internal *i = to_sas_internal(shost->transportt);
 566	int error;
 567
 568	error = i->f->phy_enable(phy, enable);
 569	if (error)
 570		return error;
 571	phy->enabled = enable;
 572	return count;
 573};
 574
 575static ssize_t
 576store_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 577		     const char *buf, size_t count)
 578{
 579	if (count < 1)
 580		return -EINVAL;
 581
 582	switch (buf[0]) {
 583	case '0':
 584		do_sas_phy_enable(dev, count, 0);
 585		break;
 586	case '1':
 587		do_sas_phy_enable(dev, count, 1);
 588		break;
 589	default:
 590		return -EINVAL;
 591	}
 592
 593	return count;
 594}
 595
 596static ssize_t
 597show_sas_phy_enable(struct device *dev, struct device_attribute *attr,
 598		    char *buf)
 599{
 600	struct sas_phy *phy = transport_class_to_phy(dev);
 601
 602	return snprintf(buf, 20, "%d", phy->enabled);
 603}
 604
 605static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
 606			 store_sas_phy_enable);
 607
 608static ssize_t
 609do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
 610{
 611	struct sas_phy *phy = transport_class_to_phy(dev);
 612	struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 613	struct sas_internal *i = to_sas_internal(shost->transportt);
 614	int error;
 615
 616	error = i->f->phy_reset(phy, hard_reset);
 617	if (error)
 618		return error;
 619	phy->enabled = 1;
 620	return count;
 621};
 622
 623static ssize_t
 624store_sas_link_reset(struct device *dev, struct device_attribute *attr,
 625		     const char *buf, size_t count)
 626{
 627	return do_sas_phy_reset(dev, count, 0);
 628}
 629static DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
 630
 631static ssize_t
 632store_sas_hard_reset(struct device *dev, struct device_attribute *attr,
 633		     const char *buf, size_t count)
 634{
 635	return do_sas_phy_reset(dev, count, 1);
 636}
 637static DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
 638
 639sas_phy_protocol_attr(identify.initiator_port_protocols,
 640		initiator_port_protocols);
 641sas_phy_protocol_attr(identify.target_port_protocols,
 642		target_port_protocols);
 643sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
 644		unsigned long long);
 645sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
 646//sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", int);
 647sas_phy_linkspeed_attr(negotiated_linkrate);
 648sas_phy_linkspeed_attr(minimum_linkrate_hw);
 649sas_phy_linkspeed_rw_attr(minimum_linkrate);
 650sas_phy_linkspeed_attr(maximum_linkrate_hw);
 651sas_phy_linkspeed_rw_attr(maximum_linkrate);
 652sas_phy_linkerror_attr(invalid_dword_count);
 653sas_phy_linkerror_attr(running_disparity_error_count);
 654sas_phy_linkerror_attr(loss_of_dword_sync_count);
 655sas_phy_linkerror_attr(phy_reset_problem_count);
 656
 657static int sas_phy_setup(struct transport_container *tc, struct device *dev,
 658			 struct device *cdev)
 659{
 660	struct sas_phy *phy = dev_to_phy(dev);
 661	struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 662	struct sas_internal *i = to_sas_internal(shost->transportt);
 663
 664	if (i->f->phy_setup)
 665		i->f->phy_setup(phy);
 666
 667	return 0;
 668}
 669
 670static DECLARE_TRANSPORT_CLASS(sas_phy_class,
 671		"sas_phy", sas_phy_setup, NULL, NULL);
 672
 673static int sas_phy_match(struct attribute_container *cont, struct device *dev)
 674{
 675	struct Scsi_Host *shost;
 676	struct sas_internal *i;
 677
 678	if (!scsi_is_sas_phy(dev))
 679		return 0;
 680	shost = dev_to_shost(dev->parent);
 681
 682	if (!shost->transportt)
 683		return 0;
 684	if (shost->transportt->host_attrs.ac.class !=
 685			&sas_host_class.class)
 686		return 0;
 687
 688	i = to_sas_internal(shost->transportt);
 689	return &i->phy_attr_cont.ac == cont;
 690}
 691
 692static void sas_phy_release(struct device *dev)
 693{
 694	struct sas_phy *phy = dev_to_phy(dev);
 695	struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
 696	struct sas_internal *i = to_sas_internal(shost->transportt);
 697
 698	if (i->f->phy_release)
 699		i->f->phy_release(phy);
 700	put_device(dev->parent);
 701	kfree(phy);
 702}
 703
 704/**
 705 * sas_phy_alloc  -  allocates and initialize a SAS PHY structure
 706 * @parent:	Parent device
 707 * @number:	Phy index
 708 *
 709 * Allocates an SAS PHY structure.  It will be added in the device tree
 710 * below the device specified by @parent, which has to be either a Scsi_Host
 711 * or sas_rphy.
 712 *
 713 * Returns:
 714 *	SAS PHY allocated or %NULL if the allocation failed.
 715 */
 716struct sas_phy *sas_phy_alloc(struct device *parent, int number)
 717{
 718	struct Scsi_Host *shost = dev_to_shost(parent);
 719	struct sas_phy *phy;
 720
 721	phy = kzalloc(sizeof(*phy), GFP_KERNEL);
 722	if (!phy)
 723		return NULL;
 724
 725	phy->number = number;
 726	phy->enabled = 1;
 727
 728	device_initialize(&phy->dev);
 729	phy->dev.parent = get_device(parent);
 730	phy->dev.release = sas_phy_release;
 731	INIT_LIST_HEAD(&phy->port_siblings);
 732	if (scsi_is_sas_expander_device(parent)) {
 733		struct sas_rphy *rphy = dev_to_rphy(parent);
 734		dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
 735			rphy->scsi_target_id, number);
 736	} else
 737		dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
 738
 739	transport_setup_device(&phy->dev);
 740
 741	return phy;
 742}
 743EXPORT_SYMBOL(sas_phy_alloc);
 744
 745/**
 746 * sas_phy_add  -  add a SAS PHY to the device hierarchy
 747 * @phy:	The PHY to be added
 748 *
 749 * Publishes a SAS PHY to the rest of the system.
 750 */
 751int sas_phy_add(struct sas_phy *phy)
 752{
 753	int error;
 754
 755	error = device_add(&phy->dev);
 756	if (!error) {
 757		transport_add_device(&phy->dev);
 758		transport_configure_device(&phy->dev);
 759	}
 760
 761	return error;
 762}
 763EXPORT_SYMBOL(sas_phy_add);
 764
 765/**
 766 * sas_phy_free  -  free a SAS PHY
 767 * @phy:	SAS PHY to free
 768 *
 769 * Frees the specified SAS PHY.
 770 *
 771 * Note:
 772 *   This function must only be called on a PHY that has not
 773 *   successfully been added using sas_phy_add().
 774 */
 775void sas_phy_free(struct sas_phy *phy)
 776{
 777	transport_destroy_device(&phy->dev);
 778	put_device(&phy->dev);
 779}
 780EXPORT_SYMBOL(sas_phy_free);
 781
 782/**
 783 * sas_phy_delete  -  remove SAS PHY
 784 * @phy:	SAS PHY to remove
 785 *
 786 * Removes the specified SAS PHY.  If the SAS PHY has an
 787 * associated remote PHY it is removed before.
 788 */
 789void
 790sas_phy_delete(struct sas_phy *phy)
 791{
 792	struct device *dev = &phy->dev;
 793
 794	/* this happens if the phy is still part of a port when deleted */
 795	BUG_ON(!list_empty(&phy->port_siblings));
 796
 797	transport_remove_device(dev);
 798	device_del(dev);
 799	transport_destroy_device(dev);
 800	put_device(dev);
 801}
 802EXPORT_SYMBOL(sas_phy_delete);
 803
 804/**
 805 * scsi_is_sas_phy  -  check if a struct device represents a SAS PHY
 806 * @dev:	device to check
 807 *
 808 * Returns:
 809 *	%1 if the device represents a SAS PHY, %0 else
 810 */
 811int scsi_is_sas_phy(const struct device *dev)
 812{
 813	return dev->release == sas_phy_release;
 814}
 815EXPORT_SYMBOL(scsi_is_sas_phy);
 816
 817/*
 818 * SAS Port attributes
 819 */
 820#define sas_port_show_simple(field, name, format_string, cast)		\
 821static ssize_t								\
 822show_sas_port_##name(struct device *dev, 				\
 823		     struct device_attribute *attr, char *buf)		\
 824{									\
 825	struct sas_port *port = transport_class_to_sas_port(dev);	\
 826									\
 827	return snprintf(buf, 20, format_string, cast port->field);	\
 828}
 829
 830#define sas_port_simple_attr(field, name, format_string, type)		\
 831	sas_port_show_simple(field, name, format_string, (type))	\
 832static DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
 833
 834sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
 835
 836static DECLARE_TRANSPORT_CLASS(sas_port_class,
 837			       "sas_port", NULL, NULL, NULL);
 838
 839static int sas_port_match(struct attribute_container *cont, struct device *dev)
 840{
 841	struct Scsi_Host *shost;
 842	struct sas_internal *i;
 843
 844	if (!scsi_is_sas_port(dev))
 845		return 0;
 846	shost = dev_to_shost(dev->parent);
 847
 848	if (!shost->transportt)
 849		return 0;
 850	if (shost->transportt->host_attrs.ac.class !=
 851			&sas_host_class.class)
 852		return 0;
 853
 854	i = to_sas_internal(shost->transportt);
 855	return &i->port_attr_cont.ac == cont;
 856}
 857
 858
 859static void sas_port_release(struct device *dev)
 860{
 861	struct sas_port *port = dev_to_sas_port(dev);
 862
 863	BUG_ON(!list_empty(&port->phy_list));
 864
 865	put_device(dev->parent);
 866	kfree(port);
 867}
 868
 869static void sas_port_create_link(struct sas_port *port,
 870				 struct sas_phy *phy)
 871{
 872	int res;
 873
 874	res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
 875				dev_name(&phy->dev));
 876	if (res)
 877		goto err;
 878	res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
 879	if (res)
 880		goto err;
 881	return;
 882err:
 883	printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
 884	       __func__, res);
 885}
 886
 887static void sas_port_delete_link(struct sas_port *port,
 888				 struct sas_phy *phy)
 889{
 890	sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
 891	sysfs_remove_link(&phy->dev.kobj, "port");
 892}
 893
 894/** sas_port_alloc - allocate and initialize a SAS port structure
 895 *
 896 * @parent:	parent device
 897 * @port_id:	port number
 898 *
 899 * Allocates a SAS port structure.  It will be added to the device tree
 900 * below the device specified by @parent which must be either a Scsi_Host
 901 * or a sas_expander_device.
 902 *
 903 * Returns %NULL on error
 904 */
 905struct sas_port *sas_port_alloc(struct device *parent, int port_id)
 906{
 907	struct Scsi_Host *shost = dev_to_shost(parent);
 908	struct sas_port *port;
 909
 910	port = kzalloc(sizeof(*port), GFP_KERNEL);
 911	if (!port)
 912		return NULL;
 913
 914	port->port_identifier = port_id;
 915
 916	device_initialize(&port->dev);
 917
 918	port->dev.parent = get_device(parent);
 919	port->dev.release = sas_port_release;
 920
 921	mutex_init(&port->phy_list_mutex);
 922	INIT_LIST_HEAD(&port->phy_list);
 923
 924	if (scsi_is_sas_expander_device(parent)) {
 925		struct sas_rphy *rphy = dev_to_rphy(parent);
 926		dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
 927			     rphy->scsi_target_id, port->port_identifier);
 928	} else
 929		dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
 930			     port->port_identifier);
 931
 932	transport_setup_device(&port->dev);
 933
 934	return port;
 935}
 936EXPORT_SYMBOL(sas_port_alloc);
 937
 938/** sas_port_alloc_num - allocate and initialize a SAS port structure
 939 *
 940 * @parent:	parent device
 941 *
 942 * Allocates a SAS port structure and a number to go with it.  This
 943 * interface is really for adapters where the port number has no
 944 * meansing, so the sas class should manage them.  It will be added to
 945 * the device tree below the device specified by @parent which must be
 946 * either a Scsi_Host or a sas_expander_device.
 947 *
 948 * Returns %NULL on error
 949 */
 950struct sas_port *sas_port_alloc_num(struct device *parent)
 951{
 952	int index;
 953	struct Scsi_Host *shost = dev_to_shost(parent);
 954	struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
 955
 956	/* FIXME: use idr for this eventually */
 957	mutex_lock(&sas_host->lock);
 958	if (scsi_is_sas_expander_device(parent)) {
 959		struct sas_rphy *rphy = dev_to_rphy(parent);
 960		struct sas_expander_device *exp = rphy_to_expander_device(rphy);
 961
 962		index = exp->next_port_id++;
 963	} else
 964		index = sas_host->next_port_id++;
 965	mutex_unlock(&sas_host->lock);
 966	return sas_port_alloc(parent, index);
 967}
 968EXPORT_SYMBOL(sas_port_alloc_num);
 969
 970/**
 971 * sas_port_add - add a SAS port to the device hierarchy
 972 * @port:	port to be added
 973 *
 974 * publishes a port to the rest of the system
 975 */
 976int sas_port_add(struct sas_port *port)
 977{
 978	int error;
 979
 980	/* No phys should be added until this is made visible */
 981	BUG_ON(!list_empty(&port->phy_list));
 982
 983	error = device_add(&port->dev);
 984
 985	if (error)
 986		return error;
 987
 988	transport_add_device(&port->dev);
 989	transport_configure_device(&port->dev);
 990
 991	return 0;
 992}
 993EXPORT_SYMBOL(sas_port_add);
 994
 995/**
 996 * sas_port_free  -  free a SAS PORT
 997 * @port:	SAS PORT to free
 998 *
 999 * Frees the specified SAS PORT.
1000 *
1001 * Note:
1002 *   This function must only be called on a PORT that has not
1003 *   successfully been added using sas_port_add().
1004 */
1005void sas_port_free(struct sas_port *port)
1006{
1007	transport_destroy_device(&port->dev);
1008	put_device(&port->dev);
1009}
1010EXPORT_SYMBOL(sas_port_free);
1011
1012/**
1013 * sas_port_delete  -  remove SAS PORT
1014 * @port:	SAS PORT to remove
1015 *
1016 * Removes the specified SAS PORT.  If the SAS PORT has an
1017 * associated phys, unlink them from the port as well.
1018 */
1019void sas_port_delete(struct sas_port *port)
1020{
1021	struct device *dev = &port->dev;
1022	struct sas_phy *phy, *tmp_phy;
1023
1024	if (port->rphy) {
1025		sas_rphy_delete(port->rphy);
1026		port->rphy = NULL;
1027	}
1028
1029	mutex_lock(&port->phy_list_mutex);
1030	list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
1031				 port_siblings) {
1032		sas_port_delete_link(port, phy);
1033		list_del_init(&phy->port_siblings);
1034	}
1035	mutex_unlock(&port->phy_list_mutex);
1036
1037	if (port->is_backlink) {
1038		struct device *parent = port->dev.parent;
1039
1040		sysfs_remove_link(&port->dev.kobj, dev_name(parent));
1041		port->is_backlink = 0;
1042	}
1043
1044	transport_remove_device(dev);
1045	device_del(dev);
1046	transport_destroy_device(dev);
1047	put_device(dev);
1048}
1049EXPORT_SYMBOL(sas_port_delete);
1050
1051/**
1052 * scsi_is_sas_port -  check if a struct device represents a SAS port
1053 * @dev:	device to check
1054 *
1055 * Returns:
1056 *	%1 if the device represents a SAS Port, %0 else
1057 */
1058int scsi_is_sas_port(const struct device *dev)
1059{
1060	return dev->release == sas_port_release;
1061}
1062EXPORT_SYMBOL(scsi_is_sas_port);
1063
1064/**
1065 * sas_port_get_phy - try to take a reference on a port member
1066 * @port: port to check
1067 */
1068struct sas_phy *sas_port_get_phy(struct sas_port *port)
1069{
1070	struct sas_phy *phy;
1071
1072	mutex_lock(&port->phy_list_mutex);
1073	if (list_empty(&port->phy_list))
1074		phy = NULL;
1075	else {
1076		struct list_head *ent = port->phy_list.next;
1077
1078		phy = list_entry(ent, typeof(*phy), port_siblings);
1079		get_device(&phy->dev);
1080	}
1081	mutex_unlock(&port->phy_list_mutex);
1082
1083	return phy;
1084}
1085EXPORT_SYMBOL(sas_port_get_phy);
1086
1087/**
1088 * sas_port_add_phy - add another phy to a port to form a wide port
1089 * @port:	port to add the phy to
1090 * @phy:	phy to add
1091 *
1092 * When a port is initially created, it is empty (has no phys).  All
1093 * ports must have at least one phy to operated, and all wide ports
1094 * must have at least two.  The current code makes no difference
1095 * between ports and wide ports, but the only object that can be
1096 * connected to a remote device is a port, so ports must be formed on
1097 * all devices with phys if they're connected to anything.
1098 */
1099void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
1100{
1101	mutex_lock(&port->phy_list_mutex);
1102	if (unlikely(!list_empty(&phy->port_siblings))) {
1103		/* make sure we're already on this port */
1104		struct sas_phy *tmp;
1105
1106		list_for_each_entry(tmp, &port->phy_list, port_siblings)
1107			if (tmp == phy)
1108				break;
1109		/* If this trips, you added a phy that was already
1110		 * part of a different port */
1111		if (unlikely(tmp != phy)) {
1112			dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
1113				   dev_name(&phy->dev));
1114			BUG();
1115		}
1116	} else {
1117		sas_port_create_link(port, phy);
1118		list_add_tail(&phy->port_siblings, &port->phy_list);
1119		port->num_phys++;
1120	}
1121	mutex_unlock(&port->phy_list_mutex);
1122}
1123EXPORT_SYMBOL(sas_port_add_phy);
1124
1125/**
1126 * sas_port_delete_phy - remove a phy from a port or wide port
1127 * @port:	port to remove the phy from
1128 * @phy:	phy to remove
1129 *
1130 * This operation is used for tearing down ports again.  It must be
1131 * done to every port or wide port before calling sas_port_delete.
1132 */
1133void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
1134{
1135	mutex_lock(&port->phy_list_mutex);
1136	sas_port_delete_link(port, phy);
1137	list_del_init(&phy->port_siblings);
1138	port->num_phys--;
1139	mutex_unlock(&port->phy_list_mutex);
1140}
1141EXPORT_SYMBOL(sas_port_delete_phy);
1142
1143void sas_port_mark_backlink(struct sas_port *port)
1144{
1145	int res;
1146	struct device *parent = port->dev.parent->parent->parent;
1147
1148	if (port->is_backlink)
1149		return;
1150	port->is_backlink = 1;
1151	res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
1152				dev_name(parent));
1153	if (res)
1154		goto err;
1155	return;
1156err:
1157	printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
1158	       __func__, res);
1159
1160}
1161EXPORT_SYMBOL(sas_port_mark_backlink);
1162
1163/*
1164 * SAS remote PHY attributes.
1165 */
1166
1167#define sas_rphy_show_simple(field, name, format_string, cast)		\
1168static ssize_t								\
1169show_sas_rphy_##name(struct device *dev, 				\
1170		     struct device_attribute *attr, char *buf)		\
1171{									\
1172	struct sas_rphy *rphy = transport_class_to_rphy(dev);		\
1173									\
1174	return snprintf(buf, 20, format_string, cast rphy->field);	\
1175}
1176
1177#define sas_rphy_simple_attr(field, name, format_string, type)		\
1178	sas_rphy_show_simple(field, name, format_string, (type))	\
1179static SAS_DEVICE_ATTR(rphy, name, S_IRUGO, 			\
1180		show_sas_rphy_##name, NULL)
1181
1182#define sas_rphy_show_protocol(field, name)				\
1183static ssize_t								\
1184show_sas_rphy_##name(struct device *dev, 				\
1185		     struct device_attribute *attr, char *buf)		\
1186{									\
1187	struct sas_rphy *rphy = transport_class_to_rphy(dev);		\
1188									\
1189	if (!rphy->field)					\
1190		return snprintf(buf, 20, "none\n");			\
1191	return get_sas_protocol_names(rphy->field, buf);	\
1192}
1193
1194#define sas_rphy_protocol_attr(field, name)				\
1195	sas_rphy_show_protocol(field, name)				\
1196static SAS_DEVICE_ATTR(rphy, name, S_IRUGO,			\
1197		show_sas_rphy_##name, NULL)
1198
1199static ssize_t
1200show_sas_rphy_device_type(struct device *dev,
1201			  struct device_attribute *attr, char *buf)
1202{
1203	struct sas_rphy *rphy = transport_class_to_rphy(dev);
1204
1205	if (!rphy->identify.device_type)
1206		return snprintf(buf, 20, "none\n");
1207	return get_sas_device_type_names(
1208			rphy->identify.device_type, buf);
1209}
1210
1211static SAS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
1212		show_sas_rphy_device_type, NULL);
1213
1214static ssize_t
1215show_sas_rphy_enclosure_identifier(struct device *dev,
1216				   struct device_attribute *attr, char *buf)
1217{
1218	struct sas_rphy *rphy = transport_class_to_rphy(dev);
1219	struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1220	struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1221	struct sas_internal *i = to_sas_internal(shost->transportt);
1222	u64 identifier;
1223	int error;
1224
1225	/*
1226	 * Only devices behind an expander are supported, because the
1227	 * enclosure identifier is a SMP feature.
1228	 */
1229	if (scsi_is_sas_phy_local(phy))
1230		return -EINVAL;
1231
1232	error = i->f->get_enclosure_identifier(rphy, &identifier);
1233	if (error)
1234		return error;
1235	return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
1236}
1237
1238static SAS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
1239		show_sas_rphy_enclosure_identifier, NULL);
1240
1241static ssize_t
1242show_sas_rphy_bay_identifier(struct device *dev,
1243			     struct device_attribute *attr, char *buf)
1244{
1245	struct sas_rphy *rphy = transport_class_to_rphy(dev);
1246	struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
1247	struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
1248	struct sas_internal *i = to_sas_internal(shost->transportt);
1249	int val;
1250
1251	if (scsi_is_sas_phy_local(phy))
1252		return -EINVAL;
1253
1254	val = i->f->get_bay_identifier(rphy);
1255	if (val < 0)
1256		return val;
1257	return sprintf(buf, "%d\n", val);
1258}
1259
1260static SAS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
1261		show_sas_rphy_bay_identifier, NULL);
1262
1263sas_rphy_protocol_attr(identify.initiator_port_protocols,
1264		initiator_port_protocols);
1265sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
1266sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
1267		unsigned long long);
1268sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
 
1269
1270/* only need 8 bytes of data plus header (4 or 8) */
1271#define BUF_SIZE 64
1272
1273int sas_read_port_mode_page(struct scsi_device *sdev)
1274{
1275	char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
1276	struct sas_end_device *rdev = sas_sdev_to_rdev(sdev);
1277	struct scsi_mode_data mode_data;
1278	int res, error;
1279
1280	if (!buffer)
1281		return -ENOMEM;
1282
1283	res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
1284			      &mode_data, NULL);
1285
1286	error = -EINVAL;
1287	if (!scsi_status_is_good(res))
1288		goto out;
1289
1290	msdata = buffer +  mode_data.header_length +
1291		mode_data.block_descriptor_length;
1292
1293	if (msdata - buffer > BUF_SIZE - 8)
1294		goto out;
1295
1296	error = 0;
1297
1298	rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
1299	rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
1300	rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
1301
1302 out:
1303	kfree(buffer);
1304	return error;
1305}
1306EXPORT_SYMBOL(sas_read_port_mode_page);
1307
1308static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
1309			       "sas_end_device", NULL, NULL, NULL);
1310
1311#define sas_end_dev_show_simple(field, name, format_string, cast)	\
1312static ssize_t								\
1313show_sas_end_dev_##name(struct device *dev, 				\
1314			struct device_attribute *attr, char *buf)	\
1315{									\
1316	struct sas_rphy *rphy = transport_class_to_rphy(dev);		\
1317	struct sas_end_device *rdev = rphy_to_end_device(rphy);		\
1318									\
1319	return snprintf(buf, 20, format_string, cast rdev->field);	\
1320}
1321
1322#define sas_end_dev_simple_attr(field, name, format_string, type)	\
1323	sas_end_dev_show_simple(field, name, format_string, (type))	\
1324static SAS_DEVICE_ATTR(end_dev, name, S_IRUGO, 			\
1325		show_sas_end_dev_##name, NULL)
1326
1327sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
1328sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
1329			"%d\n", int);
1330sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
1331			"%d\n", int);
1332sas_end_dev_simple_attr(tlr_supported, tlr_supported,
1333			"%d\n", int);
1334sas_end_dev_simple_attr(tlr_enabled, tlr_enabled,
1335			"%d\n", int);
1336
1337static DECLARE_TRANSPORT_CLASS(sas_expander_class,
1338			       "sas_expander", NULL, NULL, NULL);
1339
1340#define sas_expander_show_simple(field, name, format_string, cast)	\
1341static ssize_t								\
1342show_sas_expander_##name(struct device *dev, 				\
1343			 struct device_attribute *attr, char *buf)	\
1344{									\
1345	struct sas_rphy *rphy = transport_class_to_rphy(dev);		\
1346	struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
1347									\
1348	return snprintf(buf, 20, format_string, cast edev->field);	\
1349}
1350
1351#define sas_expander_simple_attr(field, name, format_string, type)	\
1352	sas_expander_show_simple(field, name, format_string, (type))	\
1353static SAS_DEVICE_ATTR(expander, name, S_IRUGO, 			\
1354		show_sas_expander_##name, NULL)
1355
1356sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
1357sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
1358sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
1359sas_expander_simple_attr(component_vendor_id, component_vendor_id,
1360			 "%s\n", char *);
1361sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
1362sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
1363			 unsigned int);
1364sas_expander_simple_attr(level, level, "%d\n", int);
1365
1366static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
1367		"sas_device", NULL, NULL, NULL);
1368
1369static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
1370{
1371	struct Scsi_Host *shost;
1372	struct sas_internal *i;
1373
1374	if (!scsi_is_sas_rphy(dev))
1375		return 0;
1376	shost = dev_to_shost(dev->parent->parent);
1377
1378	if (!shost->transportt)
1379		return 0;
1380	if (shost->transportt->host_attrs.ac.class !=
1381			&sas_host_class.class)
1382		return 0;
1383
1384	i = to_sas_internal(shost->transportt);
1385	return &i->rphy_attr_cont.ac == cont;
1386}
1387
1388static int sas_end_dev_match(struct attribute_container *cont,
1389			     struct device *dev)
1390{
1391	struct Scsi_Host *shost;
1392	struct sas_internal *i;
1393	struct sas_rphy *rphy;
1394
1395	if (!scsi_is_sas_rphy(dev))
1396		return 0;
1397	shost = dev_to_shost(dev->parent->parent);
1398	rphy = dev_to_rphy(dev);
1399
1400	if (!shost->transportt)
1401		return 0;
1402	if (shost->transportt->host_attrs.ac.class !=
1403			&sas_host_class.class)
1404		return 0;
1405
1406	i = to_sas_internal(shost->transportt);
1407	return &i->end_dev_attr_cont.ac == cont &&
1408		rphy->identify.device_type == SAS_END_DEVICE;
1409}
1410
1411static int sas_expander_match(struct attribute_container *cont,
1412			      struct device *dev)
1413{
1414	struct Scsi_Host *shost;
1415	struct sas_internal *i;
1416	struct sas_rphy *rphy;
1417
1418	if (!scsi_is_sas_rphy(dev))
1419		return 0;
1420	shost = dev_to_shost(dev->parent->parent);
1421	rphy = dev_to_rphy(dev);
1422
1423	if (!shost->transportt)
1424		return 0;
1425	if (shost->transportt->host_attrs.ac.class !=
1426			&sas_host_class.class)
1427		return 0;
1428
1429	i = to_sas_internal(shost->transportt);
1430	return &i->expander_attr_cont.ac == cont &&
1431		(rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
1432		 rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
1433}
1434
1435static void sas_expander_release(struct device *dev)
1436{
1437	struct sas_rphy *rphy = dev_to_rphy(dev);
1438	struct sas_expander_device *edev = rphy_to_expander_device(rphy);
1439
1440	if (rphy->q)
1441		blk_cleanup_queue(rphy->q);
1442
1443	put_device(dev->parent);
1444	kfree(edev);
1445}
1446
1447static void sas_end_device_release(struct device *dev)
1448{
1449	struct sas_rphy *rphy = dev_to_rphy(dev);
1450	struct sas_end_device *edev = rphy_to_end_device(rphy);
1451
1452	if (rphy->q)
1453		blk_cleanup_queue(rphy->q);
1454
1455	put_device(dev->parent);
1456	kfree(edev);
1457}
1458
1459/**
1460 * sas_rphy_initialize - common rphy intialization
1461 * @rphy:	rphy to initialise
1462 *
1463 * Used by both sas_end_device_alloc() and sas_expander_alloc() to
1464 * initialise the common rphy component of each.
1465 */
1466static void sas_rphy_initialize(struct sas_rphy *rphy)
1467{
1468	INIT_LIST_HEAD(&rphy->list);
1469}
1470
1471/**
1472 * sas_end_device_alloc - allocate an rphy for an end device
1473 * @parent: which port
1474 *
1475 * Allocates an SAS remote PHY structure, connected to @parent.
1476 *
1477 * Returns:
1478 *	SAS PHY allocated or %NULL if the allocation failed.
1479 */
1480struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
1481{
1482	struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1483	struct sas_end_device *rdev;
1484
1485	rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1486	if (!rdev) {
1487		return NULL;
1488	}
1489
1490	device_initialize(&rdev->rphy.dev);
1491	rdev->rphy.dev.parent = get_device(&parent->dev);
1492	rdev->rphy.dev.release = sas_end_device_release;
1493	if (scsi_is_sas_expander_device(parent->dev.parent)) {
1494		struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
1495		dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
1496			     shost->host_no, rphy->scsi_target_id,
1497			     parent->port_identifier);
1498	} else
1499		dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
1500			     shost->host_no, parent->port_identifier);
1501	rdev->rphy.identify.device_type = SAS_END_DEVICE;
1502	sas_rphy_initialize(&rdev->rphy);
1503	transport_setup_device(&rdev->rphy.dev);
1504
1505	return &rdev->rphy;
1506}
1507EXPORT_SYMBOL(sas_end_device_alloc);
1508
1509/**
1510 * sas_expander_alloc - allocate an rphy for an end device
1511 * @parent: which port
1512 * @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
1513 *
1514 * Allocates an SAS remote PHY structure, connected to @parent.
1515 *
1516 * Returns:
1517 *	SAS PHY allocated or %NULL if the allocation failed.
1518 */
1519struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
1520				    enum sas_device_type type)
1521{
1522	struct Scsi_Host *shost = dev_to_shost(&parent->dev);
1523	struct sas_expander_device *rdev;
1524	struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1525
1526	BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
1527	       type != SAS_FANOUT_EXPANDER_DEVICE);
1528
1529	rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
1530	if (!rdev) {
1531		return NULL;
1532	}
1533
1534	device_initialize(&rdev->rphy.dev);
1535	rdev->rphy.dev.parent = get_device(&parent->dev);
1536	rdev->rphy.dev.release = sas_expander_release;
1537	mutex_lock(&sas_host->lock);
1538	rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
1539	mutex_unlock(&sas_host->lock);
1540	dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
1541		     shost->host_no, rdev->rphy.scsi_target_id);
1542	rdev->rphy.identify.device_type = type;
1543	sas_rphy_initialize(&rdev->rphy);
1544	transport_setup_device(&rdev->rphy.dev);
1545
1546	return &rdev->rphy;
1547}
1548EXPORT_SYMBOL(sas_expander_alloc);
1549
1550/**
1551 * sas_rphy_add  -  add a SAS remote PHY to the device hierarchy
1552 * @rphy:	The remote PHY to be added
1553 *
1554 * Publishes a SAS remote PHY to the rest of the system.
1555 */
1556int sas_rphy_add(struct sas_rphy *rphy)
1557{
1558	struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1559	struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
1560	struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1561	struct sas_identify *identify = &rphy->identify;
1562	int error;
1563
1564	if (parent->rphy)
1565		return -ENXIO;
1566	parent->rphy = rphy;
1567
1568	error = device_add(&rphy->dev);
1569	if (error)
1570		return error;
1571	transport_add_device(&rphy->dev);
1572	transport_configure_device(&rphy->dev);
1573	if (sas_bsg_initialize(shost, rphy))
1574		printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
1575
1576
1577	mutex_lock(&sas_host->lock);
1578	list_add_tail(&rphy->list, &sas_host->rphy_list);
1579	if (identify->device_type == SAS_END_DEVICE &&
1580	    (identify->target_port_protocols &
1581	     (SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
1582		rphy->scsi_target_id = sas_host->next_target_id++;
1583	else if (identify->device_type == SAS_END_DEVICE)
1584		rphy->scsi_target_id = -1;
1585	mutex_unlock(&sas_host->lock);
1586
1587	if (identify->device_type == SAS_END_DEVICE &&
1588	    rphy->scsi_target_id != -1) {
1589		int lun;
1590
1591		if (identify->target_port_protocols & SAS_PROTOCOL_SSP)
1592			lun = SCAN_WILD_CARD;
1593		else
1594			lun = 0;
1595
1596		scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun, 0);
 
1597	}
1598
1599	return 0;
1600}
1601EXPORT_SYMBOL(sas_rphy_add);
1602
1603/**
1604 * sas_rphy_free  -  free a SAS remote PHY
1605 * @rphy: SAS remote PHY to free
1606 *
1607 * Frees the specified SAS remote PHY.
1608 *
1609 * Note:
1610 *   This function must only be called on a remote
1611 *   PHY that has not successfully been added using
1612 *   sas_rphy_add() (or has been sas_rphy_remove()'d)
1613 */
1614void sas_rphy_free(struct sas_rphy *rphy)
1615{
1616	struct device *dev = &rphy->dev;
1617	struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
1618	struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1619
1620	mutex_lock(&sas_host->lock);
1621	list_del(&rphy->list);
1622	mutex_unlock(&sas_host->lock);
1623
1624	transport_destroy_device(dev);
1625
1626	put_device(dev);
1627}
1628EXPORT_SYMBOL(sas_rphy_free);
1629
1630/**
1631 * sas_rphy_delete  -  remove and free SAS remote PHY
1632 * @rphy:	SAS remote PHY to remove and free
1633 *
1634 * Removes the specified SAS remote PHY and frees it.
1635 */
1636void
1637sas_rphy_delete(struct sas_rphy *rphy)
1638{
1639	sas_rphy_remove(rphy);
1640	sas_rphy_free(rphy);
1641}
1642EXPORT_SYMBOL(sas_rphy_delete);
1643
1644/**
1645 * sas_rphy_unlink  -  unlink SAS remote PHY
1646 * @rphy:	SAS remote phy to unlink from its parent port
1647 *
1648 * Removes port reference to an rphy
1649 */
1650void sas_rphy_unlink(struct sas_rphy *rphy)
1651{
1652	struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
1653
1654	parent->rphy = NULL;
1655}
1656EXPORT_SYMBOL(sas_rphy_unlink);
1657
1658/**
1659 * sas_rphy_remove  -  remove SAS remote PHY
1660 * @rphy:	SAS remote phy to remove
1661 *
1662 * Removes the specified SAS remote PHY.
1663 */
1664void
1665sas_rphy_remove(struct sas_rphy *rphy)
1666{
1667	struct device *dev = &rphy->dev;
1668
1669	switch (rphy->identify.device_type) {
1670	case SAS_END_DEVICE:
1671		scsi_remove_target(dev);
1672		break;
1673	case SAS_EDGE_EXPANDER_DEVICE:
1674	case SAS_FANOUT_EXPANDER_DEVICE:
1675		sas_remove_children(dev);
1676		break;
1677	default:
1678		break;
1679	}
1680
1681	sas_rphy_unlink(rphy);
1682	sas_bsg_remove(NULL, rphy);
1683	transport_remove_device(dev);
1684	device_del(dev);
1685}
1686EXPORT_SYMBOL(sas_rphy_remove);
1687
1688/**
1689 * scsi_is_sas_rphy  -  check if a struct device represents a SAS remote PHY
1690 * @dev:	device to check
1691 *
1692 * Returns:
1693 *	%1 if the device represents a SAS remote PHY, %0 else
1694 */
1695int scsi_is_sas_rphy(const struct device *dev)
1696{
1697	return dev->release == sas_end_device_release ||
1698		dev->release == sas_expander_release;
1699}
1700EXPORT_SYMBOL(scsi_is_sas_rphy);
1701
1702
1703/*
1704 * SCSI scan helper
1705 */
1706
1707static int sas_user_scan(struct Scsi_Host *shost, uint channel,
1708		uint id, uint lun)
1709{
1710	struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
1711	struct sas_rphy *rphy;
1712
1713	mutex_lock(&sas_host->lock);
1714	list_for_each_entry(rphy, &sas_host->rphy_list, list) {
1715		if (rphy->identify.device_type != SAS_END_DEVICE ||
1716		    rphy->scsi_target_id == -1)
1717			continue;
1718
1719		if ((channel == SCAN_WILD_CARD || channel == 0) &&
1720		    (id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
1721			scsi_scan_target(&rphy->dev, 0,
1722					 rphy->scsi_target_id, lun, 1);
1723		}
1724	}
1725	mutex_unlock(&sas_host->lock);
1726
1727	return 0;
1728}
1729
1730
1731/*
1732 * Setup / Teardown code
1733 */
1734
1735#define SETUP_TEMPLATE(attrb, field, perm, test)			\
1736	i->private_##attrb[count] = dev_attr_##field;		\
1737	i->private_##attrb[count].attr.mode = perm;			\
1738	i->attrb[count] = &i->private_##attrb[count];			\
1739	if (test)							\
1740		count++
1741
1742#define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm)	\
1743	i->private_##attrb[count] = dev_attr_##field;		\
1744	i->private_##attrb[count].attr.mode = perm;			\
1745	if (ro_test) {							\
1746		i->private_##attrb[count].attr.mode = ro_perm;		\
1747		i->private_##attrb[count].store = NULL;			\
1748	}								\
1749	i->attrb[count] = &i->private_##attrb[count];			\
1750	if (test)							\
1751		count++
1752
1753#define SETUP_RPORT_ATTRIBUTE(field) 					\
1754	SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
1755
1756#define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func)			\
1757	SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
1758
1759#define SETUP_PHY_ATTRIBUTE(field)					\
1760	SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
1761
1762#define SETUP_PHY_ATTRIBUTE_RW(field)					\
1763	SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,	\
1764			!i->f->set_phy_speed, S_IRUGO)
1765
1766#define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func)			\
1767	SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1,	\
1768			  !i->f->func, S_IRUGO)
1769
1770#define SETUP_PORT_ATTRIBUTE(field)					\
1771	SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
1772
1773#define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func)			\
1774	SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
1775
1776#define SETUP_PHY_ATTRIBUTE_WRONLY(field)				\
1777	SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
1778
1779#define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func)		\
1780	SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
1781
1782#define SETUP_END_DEV_ATTRIBUTE(field)					\
1783	SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
1784
1785#define SETUP_EXPANDER_ATTRIBUTE(field)					\
1786	SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
1787
1788/**
1789 * sas_attach_transport  -  instantiate SAS transport template
1790 * @ft:		SAS transport class function template
1791 */
1792struct scsi_transport_template *
1793sas_attach_transport(struct sas_function_template *ft)
1794{
1795	struct sas_internal *i;
1796	int count;
1797
1798	i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
1799	if (!i)
1800		return NULL;
1801
1802	i->t.user_scan = sas_user_scan;
1803
1804	i->t.host_attrs.ac.attrs = &i->host_attrs[0];
1805	i->t.host_attrs.ac.class = &sas_host_class.class;
1806	i->t.host_attrs.ac.match = sas_host_match;
1807	transport_container_register(&i->t.host_attrs);
1808	i->t.host_size = sizeof(struct sas_host_attrs);
1809
1810	i->phy_attr_cont.ac.class = &sas_phy_class.class;
1811	i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
1812	i->phy_attr_cont.ac.match = sas_phy_match;
1813	transport_container_register(&i->phy_attr_cont);
1814
1815	i->port_attr_cont.ac.class = &sas_port_class.class;
1816	i->port_attr_cont.ac.attrs = &i->port_attrs[0];
1817	i->port_attr_cont.ac.match = sas_port_match;
1818	transport_container_register(&i->port_attr_cont);
1819
1820	i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
1821	i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
1822	i->rphy_attr_cont.ac.match = sas_rphy_match;
1823	transport_container_register(&i->rphy_attr_cont);
1824
1825	i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
1826	i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
1827	i->end_dev_attr_cont.ac.match = sas_end_dev_match;
1828	transport_container_register(&i->end_dev_attr_cont);
1829
1830	i->expander_attr_cont.ac.class = &sas_expander_class.class;
1831	i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
1832	i->expander_attr_cont.ac.match = sas_expander_match;
1833	transport_container_register(&i->expander_attr_cont);
1834
1835	i->f = ft;
1836
1837	count = 0;
1838	SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
1839	SETUP_PHY_ATTRIBUTE(target_port_protocols);
1840	SETUP_PHY_ATTRIBUTE(device_type);
1841	SETUP_PHY_ATTRIBUTE(sas_address);
1842	SETUP_PHY_ATTRIBUTE(phy_identifier);
1843	//SETUP_PHY_ATTRIBUTE(port_identifier);
1844	SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
1845	SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
1846	SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
1847	SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
1848	SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
1849
1850	SETUP_PHY_ATTRIBUTE(invalid_dword_count);
1851	SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
1852	SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
1853	SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
1854	SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
1855	SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
1856	SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
1857	i->phy_attrs[count] = NULL;
1858
1859	count = 0;
1860	SETUP_PORT_ATTRIBUTE(num_phys);
1861	i->port_attrs[count] = NULL;
1862
1863	count = 0;
1864	SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
1865	SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
1866	SETUP_RPORT_ATTRIBUTE(rphy_device_type);
1867	SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
1868	SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
 
1869	SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
1870				       get_enclosure_identifier);
1871	SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
1872				       get_bay_identifier);
1873	i->rphy_attrs[count] = NULL;
1874
1875	count = 0;
1876	SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
1877	SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
1878	SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
1879	SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_supported);
1880	SETUP_END_DEV_ATTRIBUTE(end_dev_tlr_enabled);
1881	i->end_dev_attrs[count] = NULL;
1882
1883	count = 0;
1884	SETUP_EXPANDER_ATTRIBUTE(vendor_id);
1885	SETUP_EXPANDER_ATTRIBUTE(product_id);
1886	SETUP_EXPANDER_ATTRIBUTE(product_rev);
1887	SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
1888	SETUP_EXPANDER_ATTRIBUTE(component_id);
1889	SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
1890	SETUP_EXPANDER_ATTRIBUTE(level);
1891	i->expander_attrs[count] = NULL;
1892
1893	return &i->t;
1894}
1895EXPORT_SYMBOL(sas_attach_transport);
1896
1897/**
1898 * sas_release_transport  -  release SAS transport template instance
1899 * @t:		transport template instance
1900 */
1901void sas_release_transport(struct scsi_transport_template *t)
1902{
1903	struct sas_internal *i = to_sas_internal(t);
1904
1905	transport_container_unregister(&i->t.host_attrs);
1906	transport_container_unregister(&i->phy_attr_cont);
1907	transport_container_unregister(&i->port_attr_cont);
1908	transport_container_unregister(&i->rphy_attr_cont);
1909	transport_container_unregister(&i->end_dev_attr_cont);
1910	transport_container_unregister(&i->expander_attr_cont);
1911
1912	kfree(i);
1913}
1914EXPORT_SYMBOL(sas_release_transport);
1915
1916static __init int sas_transport_init(void)
1917{
1918	int error;
1919
1920	error = transport_class_register(&sas_host_class);
1921	if (error)
1922		goto out;
1923	error = transport_class_register(&sas_phy_class);
1924	if (error)
1925		goto out_unregister_transport;
1926	error = transport_class_register(&sas_port_class);
1927	if (error)
1928		goto out_unregister_phy;
1929	error = transport_class_register(&sas_rphy_class);
1930	if (error)
1931		goto out_unregister_port;
1932	error = transport_class_register(&sas_end_dev_class);
1933	if (error)
1934		goto out_unregister_rphy;
1935	error = transport_class_register(&sas_expander_class);
1936	if (error)
1937		goto out_unregister_end_dev;
1938
1939	return 0;
1940
1941 out_unregister_end_dev:
1942	transport_class_unregister(&sas_end_dev_class);
1943 out_unregister_rphy:
1944	transport_class_unregister(&sas_rphy_class);
1945 out_unregister_port:
1946	transport_class_unregister(&sas_port_class);
1947 out_unregister_phy:
1948	transport_class_unregister(&sas_phy_class);
1949 out_unregister_transport:
1950	transport_class_unregister(&sas_host_class);
1951 out:
1952	return error;
1953
1954}
1955
1956static void __exit sas_transport_exit(void)
1957{
1958	transport_class_unregister(&sas_host_class);
1959	transport_class_unregister(&sas_phy_class);
1960	transport_class_unregister(&sas_port_class);
1961	transport_class_unregister(&sas_rphy_class);
1962	transport_class_unregister(&sas_end_dev_class);
1963	transport_class_unregister(&sas_expander_class);
1964}
1965
1966MODULE_AUTHOR("Christoph Hellwig");
1967MODULE_DESCRIPTION("SAS Transport Attributes");
1968MODULE_LICENSE("GPL");
1969
1970module_init(sas_transport_init);
1971module_exit(sas_transport_exit);