1/*
   2 *    driver for Microsemi PQI-based storage controllers
   3 *    Copyright (c) 2016-2017 Microsemi Corporation
   4 *    Copyright (c) 2016 PMC-Sierra, Inc.
   5 *
   6 *    This program is free software; you can redistribute it and/or modify
   7 *    it under the terms of the GNU General Public License as published by
   8 *    the Free Software Foundation; version 2 of the License.
   9 *
  10 *    This program is distributed in the hope that it will be useful,
  11 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  13 *    NON INFRINGEMENT.  See the GNU General Public License for more details.
  14 *
  15 *    Questions/Comments/Bugfixes to esc.storagedev@microsemi.com
  16 *
  17 */
  18
  19#include <linux/module.h>
  20#include <linux/kernel.h>
  21#include <linux/pci.h>
  22#include <linux/delay.h>
  23#include <linux/interrupt.h>
  24#include <linux/sched.h>
  25#include <linux/rtc.h>
  26#include <linux/bcd.h>
  27#include <linux/reboot.h>
  28#include <linux/cciss_ioctl.h>
  29#include <linux/blk-mq-pci.h>
  30#include <scsi/scsi_host.h>
  31#include <scsi/scsi_cmnd.h>
  32#include <scsi/scsi_device.h>
  33#include <scsi/scsi_eh.h>
  34#include <scsi/scsi_transport_sas.h>
  35#include <asm/unaligned.h>
  36#include "smartpqi.h"
  37#include "smartpqi_sis.h"
  38
  39#if !defined(BUILD_TIMESTAMP)
  40#define BUILD_TIMESTAMP
  41#endif
  42
  43#define DRIVER_VERSION		"1.1.4-115"
  44#define DRIVER_MAJOR		1
  45#define DRIVER_MINOR		1
  46#define DRIVER_RELEASE		4
  47#define DRIVER_REVISION		115
  48
  49#define DRIVER_NAME		"Microsemi PQI Driver (v" \
  50				DRIVER_VERSION BUILD_TIMESTAMP ")"
  51#define DRIVER_NAME_SHORT	"smartpqi"
  52
  53#define PQI_EXTRA_SGL_MEMORY	(12 * sizeof(struct pqi_sg_descriptor))
  54
  55MODULE_AUTHOR("Microsemi");
  56MODULE_DESCRIPTION("Driver for Microsemi Smart Family Controller version "
  57	DRIVER_VERSION);
  58MODULE_SUPPORTED_DEVICE("Microsemi Smart Family Controllers");
  59MODULE_VERSION(DRIVER_VERSION);
  60MODULE_LICENSE("GPL");
  61
  62static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info);
  63static void pqi_ctrl_offline_worker(struct work_struct *work);
  64static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info);
  65static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info);
  66static void pqi_scan_start(struct Scsi_Host *shost);
  67static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
  68	struct pqi_queue_group *queue_group, enum pqi_io_path path,
  69	struct pqi_io_request *io_request);
  70static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
  71	struct pqi_iu_header *request, unsigned int flags,
  72	struct pqi_raid_error_info *error_info, unsigned long timeout_msecs);
  73static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
  74	struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
  75	unsigned int cdb_length, struct pqi_queue_group *queue_group,
  76	struct pqi_encryption_info *encryption_info, bool raid_bypass);
  77
  78/* for flags argument to pqi_submit_raid_request_synchronous() */
  79#define PQI_SYNC_FLAGS_INTERRUPTABLE	0x1
  80
  81static struct scsi_transport_template *pqi_sas_transport_template;
  82
  83static atomic_t pqi_controller_count = ATOMIC_INIT(0);
  84
  85enum pqi_lockup_action {
  86	NONE,
  87	REBOOT,
  88	PANIC
  89};
  90
  91static enum pqi_lockup_action pqi_lockup_action = NONE;
  92
  93static struct {
  94	enum pqi_lockup_action	action;
  95	char			*name;
  96} pqi_lockup_actions[] = {
  97	{
  98		.action = NONE,
  99		.name = "none",
 100	},
 101	{
 102		.action = REBOOT,
 103		.name = "reboot",
 104	},
 105	{
 106		.action = PANIC,
 107		.name = "panic",
 108	},
 109};
 110
 111static unsigned int pqi_supported_event_types[] = {
 112	PQI_EVENT_TYPE_HOTPLUG,
 113	PQI_EVENT_TYPE_HARDWARE,
 114	PQI_EVENT_TYPE_PHYSICAL_DEVICE,
 115	PQI_EVENT_TYPE_LOGICAL_DEVICE,
 116	PQI_EVENT_TYPE_AIO_STATE_CHANGE,
 117	PQI_EVENT_TYPE_AIO_CONFIG_CHANGE,
 118};
 119
 120static int pqi_disable_device_id_wildcards;
 121module_param_named(disable_device_id_wildcards,
 122	pqi_disable_device_id_wildcards, int, 0644);
 123MODULE_PARM_DESC(disable_device_id_wildcards,
 124	"Disable device ID wildcards.");
 125
 126static int pqi_disable_heartbeat;
 127module_param_named(disable_heartbeat,
 128	pqi_disable_heartbeat, int, 0644);
 129MODULE_PARM_DESC(disable_heartbeat,
 130	"Disable heartbeat.");
 131
 132static int pqi_disable_ctrl_shutdown;
 133module_param_named(disable_ctrl_shutdown,
 134	pqi_disable_ctrl_shutdown, int, 0644);
 135MODULE_PARM_DESC(disable_ctrl_shutdown,
 136	"Disable controller shutdown when controller locked up.");
 137
 138static char *pqi_lockup_action_param;
 139module_param_named(lockup_action,
 140	pqi_lockup_action_param, charp, 0644);
 141MODULE_PARM_DESC(lockup_action, "Action to take when controller locked up.\n"
 142	"\t\tSupported: none, reboot, panic\n"
 143	"\t\tDefault: none");
 144
 145static char *raid_levels[] = {
 146	"RAID-0",
 147	"RAID-4",
 148	"RAID-1(1+0)",
 149	"RAID-5",
 150	"RAID-5+1",
 151	"RAID-ADG",
 152	"RAID-1(ADM)",
 153};
 154
 155static char *pqi_raid_level_to_string(u8 raid_level)
 156{
 157	if (raid_level < ARRAY_SIZE(raid_levels))
 158		return raid_levels[raid_level];
 159
 160	return "RAID UNKNOWN";
 161}
 162
 163#define SA_RAID_0		0
 164#define SA_RAID_4		1
 165#define SA_RAID_1		2	/* also used for RAID 10 */
 166#define SA_RAID_5		3	/* also used for RAID 50 */
 167#define SA_RAID_51		4
 168#define SA_RAID_6		5	/* also used for RAID 60 */
 169#define SA_RAID_ADM		6	/* also used for RAID 1+0 ADM */
 170#define SA_RAID_MAX		SA_RAID_ADM
 171#define SA_RAID_UNKNOWN		0xff
 172
 173static inline void pqi_scsi_done(struct scsi_cmnd *scmd)
 174{
 175	pqi_prep_for_scsi_done(scmd);
 176	scmd->scsi_done(scmd);
 177}
 178
 179static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2)
 180{
 181	return memcmp(scsi3addr1, scsi3addr2, 8) == 0;
 182}
 183
 184static inline struct pqi_ctrl_info *shost_to_hba(struct Scsi_Host *shost)
 185{
 186	void *hostdata = shost_priv(shost);
 187
 188	return *((struct pqi_ctrl_info **)hostdata);
 189}
 190
 191static inline bool pqi_is_logical_device(struct pqi_scsi_dev *device)
 192{
 193	return !device->is_physical_device;
 194}
 195
 196static inline bool pqi_is_external_raid_addr(u8 *scsi3addr)
 197{
 198	return scsi3addr[2] != 0;
 199}
 200
 201static inline bool pqi_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
 202{
 203	return !ctrl_info->controller_online;
 204}
 205
 206static inline void pqi_check_ctrl_health(struct pqi_ctrl_info *ctrl_info)
 207{
 208	if (ctrl_info->controller_online)
 209		if (!sis_is_firmware_running(ctrl_info))
 210			pqi_take_ctrl_offline(ctrl_info);
 211}
 212
 213static inline bool pqi_is_hba_lunid(u8 *scsi3addr)
 214{
 215	return pqi_scsi3addr_equal(scsi3addr, RAID_CTLR_LUNID);
 216}
 217
 218static inline enum pqi_ctrl_mode pqi_get_ctrl_mode(
 219	struct pqi_ctrl_info *ctrl_info)
 220{
 221	return sis_read_driver_scratch(ctrl_info);
 222}
 223
 224static inline void pqi_save_ctrl_mode(struct pqi_ctrl_info *ctrl_info,
 225	enum pqi_ctrl_mode mode)
 226{
 227	sis_write_driver_scratch(ctrl_info, mode);
 228}
 229
 230static inline void pqi_ctrl_block_requests(struct pqi_ctrl_info *ctrl_info)
 231{
 232	ctrl_info->block_requests = true;
 233	scsi_block_requests(ctrl_info->scsi_host);
 234}
 235
 236static inline void pqi_ctrl_unblock_requests(struct pqi_ctrl_info *ctrl_info)
 237{
 238	ctrl_info->block_requests = false;
 239	wake_up_all(&ctrl_info->block_requests_wait);
 240	pqi_retry_raid_bypass_requests(ctrl_info);
 241	scsi_unblock_requests(ctrl_info->scsi_host);
 242}
 243
 244static inline bool pqi_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
 245{
 246	return ctrl_info->block_requests;
 247}
 248
 249static unsigned long pqi_wait_if_ctrl_blocked(struct pqi_ctrl_info *ctrl_info,
 250	unsigned long timeout_msecs)
 251{
 252	unsigned long remaining_msecs;
 253
 254	if (!pqi_ctrl_blocked(ctrl_info))
 255		return timeout_msecs;
 256
 257	atomic_inc(&ctrl_info->num_blocked_threads);
 258
 259	if (timeout_msecs == NO_TIMEOUT) {
 260		wait_event(ctrl_info->block_requests_wait,
 261			!pqi_ctrl_blocked(ctrl_info));
 262		remaining_msecs = timeout_msecs;
 263	} else {
 264		unsigned long remaining_jiffies;
 265
 266		remaining_jiffies =
 267			wait_event_timeout(ctrl_info->block_requests_wait,
 268				!pqi_ctrl_blocked(ctrl_info),
 269				msecs_to_jiffies(timeout_msecs));
 270		remaining_msecs = jiffies_to_msecs(remaining_jiffies);
 271	}
 272
 273	atomic_dec(&ctrl_info->num_blocked_threads);
 274
 275	return remaining_msecs;
 276}
 277
 278static inline void pqi_ctrl_busy(struct pqi_ctrl_info *ctrl_info)
 279{
 280	atomic_inc(&ctrl_info->num_busy_threads);
 281}
 282
 283static inline void pqi_ctrl_unbusy(struct pqi_ctrl_info *ctrl_info)
 284{
 285	atomic_dec(&ctrl_info->num_busy_threads);
 286}
 287
 288static inline void pqi_ctrl_wait_until_quiesced(struct pqi_ctrl_info *ctrl_info)
 289{
 290	while (atomic_read(&ctrl_info->num_busy_threads) >
 291		atomic_read(&ctrl_info->num_blocked_threads))
 292		usleep_range(1000, 2000);
 293}
 294
 295static inline bool pqi_device_offline(struct pqi_scsi_dev *device)
 296{
 297	return device->device_offline;
 298}
 299
 300static inline void pqi_device_reset_start(struct pqi_scsi_dev *device)
 301{
 302	device->in_reset = true;
 303}
 304
 305static inline void pqi_device_reset_done(struct pqi_scsi_dev *device)
 306{
 307	device->in_reset = false;
 308}
 309
 310static inline bool pqi_device_in_reset(struct pqi_scsi_dev *device)
 311{
 312	return device->in_reset;
 313}
 314
 315static inline void pqi_schedule_rescan_worker_with_delay(
 316	struct pqi_ctrl_info *ctrl_info, unsigned long delay)
 317{
 318	if (pqi_ctrl_offline(ctrl_info))
 319		return;
 320
 321	schedule_delayed_work(&ctrl_info->rescan_work, delay);
 322}
 323
 324static inline void pqi_schedule_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 325{
 326	pqi_schedule_rescan_worker_with_delay(ctrl_info, 0);
 327}
 328
 329#define PQI_RESCAN_WORK_DELAY  (10 * HZ)
 330
 331static inline void pqi_schedule_rescan_worker_delayed(
 332	struct pqi_ctrl_info *ctrl_info)
 333{
 334	pqi_schedule_rescan_worker_with_delay(ctrl_info, PQI_RESCAN_WORK_DELAY);
 335}
 336
 337static inline void pqi_cancel_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 338{
 339	cancel_delayed_work_sync(&ctrl_info->rescan_work);
 340}
 341
 342static inline u32 pqi_read_heartbeat_counter(struct pqi_ctrl_info *ctrl_info)
 343{
 344	if (!ctrl_info->heartbeat_counter)
 345		return 0;
 346
 347	return readl(ctrl_info->heartbeat_counter);
 348}
 349
 350static int pqi_map_single(struct pci_dev *pci_dev,
 351	struct pqi_sg_descriptor *sg_descriptor, void *buffer,
 352	size_t buffer_length, int data_direction)
 353{
 354	dma_addr_t bus_address;
 355
 356	if (!buffer || buffer_length == 0 || data_direction == PCI_DMA_NONE)
 357		return 0;
 358
 359	bus_address = pci_map_single(pci_dev, buffer, buffer_length,
 360		data_direction);
 361	if (pci_dma_mapping_error(pci_dev, bus_address))
 362		return -ENOMEM;
 363
 364	put_unaligned_le64((u64)bus_address, &sg_descriptor->address);
 365	put_unaligned_le32(buffer_length, &sg_descriptor->length);
 366	put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
 367
 368	return 0;
 369}
 370
 371static void pqi_pci_unmap(struct pci_dev *pci_dev,
 372	struct pqi_sg_descriptor *descriptors, int num_descriptors,
 373	int data_direction)
 374{
 375	int i;
 376
 377	if (data_direction == PCI_DMA_NONE)
 378		return;
 379
 380	for (i = 0; i < num_descriptors; i++)
 381		pci_unmap_single(pci_dev,
 382			(dma_addr_t)get_unaligned_le64(&descriptors[i].address),
 383			get_unaligned_le32(&descriptors[i].length),
 384			data_direction);
 385}
 386
 387static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
 388	struct pqi_raid_path_request *request, u8 cmd,
 389	u8 *scsi3addr, void *buffer, size_t buffer_length,
 390	u16 vpd_page, int *pci_direction)
 391{
 392	u8 *cdb;
 393	int pci_dir;
 394
 395	memset(request, 0, sizeof(*request));
 396
 397	request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
 398	put_unaligned_le16(offsetof(struct pqi_raid_path_request,
 399		sg_descriptors[1]) - PQI_REQUEST_HEADER_LENGTH,
 400		&request->header.iu_length);
 401	put_unaligned_le32(buffer_length, &request->buffer_length);
 402	memcpy(request->lun_number, scsi3addr, sizeof(request->lun_number));
 403	request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
 404	request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
 405
 406	cdb = request->cdb;
 407
 408	switch (cmd) {
 409	case INQUIRY:
 410		request->data_direction = SOP_READ_FLAG;
 411		cdb[0] = INQUIRY;
 412		if (vpd_page & VPD_PAGE) {
 413			cdb[1] = 0x1;
 414			cdb[2] = (u8)vpd_page;
 415		}
 416		cdb[4] = (u8)buffer_length;
 417		break;
 418	case CISS_REPORT_LOG:
 419	case CISS_REPORT_PHYS:
 420		request->data_direction = SOP_READ_FLAG;
 421		cdb[0] = cmd;
 422		if (cmd == CISS_REPORT_PHYS)
 423			cdb[1] = CISS_REPORT_PHYS_EXTENDED;
 424		else
 425			cdb[1] = CISS_REPORT_LOG_EXTENDED;
 426		put_unaligned_be32(buffer_length, &cdb[6]);
 427		break;
 428	case CISS_GET_RAID_MAP:
 429		request->data_direction = SOP_READ_FLAG;
 430		cdb[0] = CISS_READ;
 431		cdb[1] = CISS_GET_RAID_MAP;
 432		put_unaligned_be32(buffer_length, &cdb[6]);
 433		break;
 434	case SA_FLUSH_CACHE:
 435		request->data_direction = SOP_WRITE_FLAG;
 436		cdb[0] = BMIC_WRITE;
 437		cdb[6] = BMIC_FLUSH_CACHE;
 438		put_unaligned_be16(buffer_length, &cdb[7]);
 439		break;
 440	case BMIC_IDENTIFY_CONTROLLER:
 441	case BMIC_IDENTIFY_PHYSICAL_DEVICE:
 442		request->data_direction = SOP_READ_FLAG;
 443		cdb[0] = BMIC_READ;
 444		cdb[6] = cmd;
 445		put_unaligned_be16(buffer_length, &cdb[7]);
 446		break;
 447	case BMIC_WRITE_HOST_WELLNESS:
 448		request->data_direction = SOP_WRITE_FLAG;
 449		cdb[0] = BMIC_WRITE;
 450		cdb[6] = cmd;
 451		put_unaligned_be16(buffer_length, &cdb[7]);
 452		break;
 453	default:
 454		dev_err(&ctrl_info->pci_dev->dev, "unknown command 0x%c\n",
 455			cmd);
 456		break;
 457	}
 458
 459	switch (request->data_direction) {
 460	case SOP_READ_FLAG:
 461		pci_dir = PCI_DMA_FROMDEVICE;
 462		break;
 463	case SOP_WRITE_FLAG:
 464		pci_dir = PCI_DMA_TODEVICE;
 465		break;
 466	case SOP_NO_DIRECTION_FLAG:
 467		pci_dir = PCI_DMA_NONE;
 468		break;
 469	default:
 470		pci_dir = PCI_DMA_BIDIRECTIONAL;
 471		break;
 472	}
 473
 474	*pci_direction = pci_dir;
 475
 476	return pqi_map_single(ctrl_info->pci_dev, &request->sg_descriptors[0],
 477		buffer, buffer_length, pci_dir);
 478}
 479
 480static inline void pqi_reinit_io_request(struct pqi_io_request *io_request)
 481{
 482	io_request->scmd = NULL;
 483	io_request->status = 0;
 484	io_request->error_info = NULL;
 485	io_request->raid_bypass = false;
 486}
 487
 488static struct pqi_io_request *pqi_alloc_io_request(
 489	struct pqi_ctrl_info *ctrl_info)
 490{
 491	struct pqi_io_request *io_request;
 492	u16 i = ctrl_info->next_io_request_slot;	/* benignly racy */
 493
 494	while (1) {
 495		io_request = &ctrl_info->io_request_pool[i];
 496		if (atomic_inc_return(&io_request->refcount) == 1)
 497			break;
 498		atomic_dec(&io_request->refcount);
 499		i = (i + 1) % ctrl_info->max_io_slots;
 500	}
 501
 502	/* benignly racy */
 503	ctrl_info->next_io_request_slot = (i + 1) % ctrl_info->max_io_slots;
 504
 505	pqi_reinit_io_request(io_request);
 506
 507	return io_request;
 508}
 509
 510static void pqi_free_io_request(struct pqi_io_request *io_request)
 511{
 512	atomic_dec(&io_request->refcount);
 513}
 514
 515static int pqi_identify_controller(struct pqi_ctrl_info *ctrl_info,
 516	struct bmic_identify_controller *buffer)
 517{
 518	int rc;
 519	int pci_direction;
 520	struct pqi_raid_path_request request;
 521
 522	rc = pqi_build_raid_path_request(ctrl_info, &request,
 523		BMIC_IDENTIFY_CONTROLLER, RAID_CTLR_LUNID, buffer,
 524		sizeof(*buffer), 0, &pci_direction);
 525	if (rc)
 526		return rc;
 527
 528	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
 529		NULL, NO_TIMEOUT);
 530
 531	pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 532		pci_direction);
 533
 534	return rc;
 535}
 536
 537static int pqi_scsi_inquiry(struct pqi_ctrl_info *ctrl_info,
 538	u8 *scsi3addr, u16 vpd_page, void *buffer, size_t buffer_length)
 539{
 540	int rc;
 541	int pci_direction;
 542	struct pqi_raid_path_request request;
 543
 544	rc = pqi_build_raid_path_request(ctrl_info, &request,
 545		INQUIRY, scsi3addr, buffer, buffer_length, vpd_page,
 546		&pci_direction);
 547	if (rc)
 548		return rc;
 549
 550	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
 551		NULL, NO_TIMEOUT);
 552
 553	pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 554		pci_direction);
 555
 556	return rc;
 557}
 558
 559static int pqi_identify_physical_device(struct pqi_ctrl_info *ctrl_info,
 560	struct pqi_scsi_dev *device,
 561	struct bmic_identify_physical_device *buffer,
 562	size_t buffer_length)
 563{
 564	int rc;
 565	int pci_direction;
 566	u16 bmic_device_index;
 567	struct pqi_raid_path_request request;
 568
 569	rc = pqi_build_raid_path_request(ctrl_info, &request,
 570		BMIC_IDENTIFY_PHYSICAL_DEVICE, RAID_CTLR_LUNID, buffer,
 571		buffer_length, 0, &pci_direction);
 572	if (rc)
 573		return rc;
 574
 575	bmic_device_index = CISS_GET_DRIVE_NUMBER(device->scsi3addr);
 576	request.cdb[2] = (u8)bmic_device_index;
 577	request.cdb[9] = (u8)(bmic_device_index >> 8);
 578
 579	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 580		0, NULL, NO_TIMEOUT);
 581
 582	pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 583		pci_direction);
 584
 585	return rc;
 586}
 587
 588static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info,
 589	enum bmic_flush_cache_shutdown_event shutdown_event)
 590{
 591	int rc;
 592	struct pqi_raid_path_request request;
 593	int pci_direction;
 594	struct bmic_flush_cache *flush_cache;
 595
 596	/*
 597	 * Don't bother trying to flush the cache if the controller is
 598	 * locked up.
 599	 */
 600	if (pqi_ctrl_offline(ctrl_info))
 601		return -ENXIO;
 602
 603	flush_cache = kzalloc(sizeof(*flush_cache), GFP_KERNEL);
 604	if (!flush_cache)
 605		return -ENOMEM;
 606
 607	flush_cache->shutdown_event = shutdown_event;
 608
 609	rc = pqi_build_raid_path_request(ctrl_info, &request,
 610		SA_FLUSH_CACHE, RAID_CTLR_LUNID, flush_cache,
 611		sizeof(*flush_cache), 0, &pci_direction);
 612	if (rc)
 613		goto out;
 614
 615	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 616		0, NULL, NO_TIMEOUT);
 617
 618	pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 619		pci_direction);
 620
 621out:
 622	kfree(flush_cache);
 623
 624	return rc;
 625}
 626
 627static int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info,
 628	void *buffer, size_t buffer_length)
 629{
 630	int rc;
 631	struct pqi_raid_path_request request;
 632	int pci_direction;
 633
 634	rc = pqi_build_raid_path_request(ctrl_info, &request,
 635		BMIC_WRITE_HOST_WELLNESS, RAID_CTLR_LUNID, buffer,
 636		buffer_length, 0, &pci_direction);
 637	if (rc)
 638		return rc;
 639
 640	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 641		0, NULL, NO_TIMEOUT);
 642
 643	pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 644		pci_direction);
 645
 646	return rc;
 647}
 648
 649#pragma pack(1)
 650
 651struct bmic_host_wellness_driver_version {
 652	u8	start_tag[4];
 653	u8	driver_version_tag[2];
 654	__le16	driver_version_length;
 655	char	driver_version[32];
 656	u8	end_tag[2];
 657};
 658
 659#pragma pack()
 660
 661static int pqi_write_driver_version_to_host_wellness(
 662	struct pqi_ctrl_info *ctrl_info)
 663{
 664	int rc;
 665	struct bmic_host_wellness_driver_version *buffer;
 666	size_t buffer_length;
 667
 668	buffer_length = sizeof(*buffer);
 669
 670	buffer = kmalloc(buffer_length, GFP_KERNEL);
 671	if (!buffer)
 672		return -ENOMEM;
 673
 674	buffer->start_tag[0] = '<';
 675	buffer->start_tag[1] = 'H';
 676	buffer->start_tag[2] = 'W';
 677	buffer->start_tag[3] = '>';
 678	buffer->driver_version_tag[0] = 'D';
 679	buffer->driver_version_tag[1] = 'V';
 680	put_unaligned_le16(sizeof(buffer->driver_version),
 681		&buffer->driver_version_length);
 682	strncpy(buffer->driver_version, "Linux " DRIVER_VERSION,
 683		sizeof(buffer->driver_version) - 1);
 684	buffer->driver_version[sizeof(buffer->driver_version) - 1] = '\0';
 685	buffer->end_tag[0] = 'Z';
 686	buffer->end_tag[1] = 'Z';
 687
 688	rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 689
 690	kfree(buffer);
 691
 692	return rc;
 693}
 694
 695#pragma pack(1)
 696
 697struct bmic_host_wellness_time {
 698	u8	start_tag[4];
 699	u8	time_tag[2];
 700	__le16	time_length;
 701	u8	time[8];
 702	u8	dont_write_tag[2];
 703	u8	end_tag[2];
 704};
 705
 706#pragma pack()
 707
 708static int pqi_write_current_time_to_host_wellness(
 709	struct pqi_ctrl_info *ctrl_info)
 710{
 711	int rc;
 712	struct bmic_host_wellness_time *buffer;
 713	size_t buffer_length;
 714	time64_t local_time;
 715	unsigned int year;
 716	struct tm tm;
 717
 718	buffer_length = sizeof(*buffer);
 719
 720	buffer = kmalloc(buffer_length, GFP_KERNEL);
 721	if (!buffer)
 722		return -ENOMEM;
 723
 724	buffer->start_tag[0] = '<';
 725	buffer->start_tag[1] = 'H';
 726	buffer->start_tag[2] = 'W';
 727	buffer->start_tag[3] = '>';
 728	buffer->time_tag[0] = 'T';
 729	buffer->time_tag[1] = 'D';
 730	put_unaligned_le16(sizeof(buffer->time),
 731		&buffer->time_length);
 732
 733	local_time = ktime_get_real_seconds();
 734	time64_to_tm(local_time, -sys_tz.tz_minuteswest * 60, &tm);
 735	year = tm.tm_year + 1900;
 736
 737	buffer->time[0] = bin2bcd(tm.tm_hour);
 738	buffer->time[1] = bin2bcd(tm.tm_min);
 739	buffer->time[2] = bin2bcd(tm.tm_sec);
 740	buffer->time[3] = 0;
 741	buffer->time[4] = bin2bcd(tm.tm_mon + 1);
 742	buffer->time[5] = bin2bcd(tm.tm_mday);
 743	buffer->time[6] = bin2bcd(year / 100);
 744	buffer->time[7] = bin2bcd(year % 100);
 745
 746	buffer->dont_write_tag[0] = 'D';
 747	buffer->dont_write_tag[1] = 'W';
 748	buffer->end_tag[0] = 'Z';
 749	buffer->end_tag[1] = 'Z';
 750
 751	rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 752
 753	kfree(buffer);
 754
 755	return rc;
 756}
 757
 758#define PQI_UPDATE_TIME_WORK_INTERVAL	(24UL * 60 * 60 * HZ)
 759
 760static void pqi_update_time_worker(struct work_struct *work)
 761{
 762	int rc;
 763	struct pqi_ctrl_info *ctrl_info;
 764
 765	ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
 766		update_time_work);
 767
 768	if (pqi_ctrl_offline(ctrl_info))
 769		return;
 770
 771	rc = pqi_write_current_time_to_host_wellness(ctrl_info);
 772	if (rc)
 773		dev_warn(&ctrl_info->pci_dev->dev,
 774			"error updating time on controller\n");
 775
 776	schedule_delayed_work(&ctrl_info->update_time_work,
 777		PQI_UPDATE_TIME_WORK_INTERVAL);
 778}
 779
 780static inline void pqi_schedule_update_time_worker(
 781	struct pqi_ctrl_info *ctrl_info)
 782{
 783	schedule_delayed_work(&ctrl_info->update_time_work, 0);
 784}
 785
 786static inline void pqi_cancel_update_time_worker(
 787	struct pqi_ctrl_info *ctrl_info)
 788{
 789	cancel_delayed_work_sync(&ctrl_info->update_time_work);
 790}
 791
 792static int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 793	void *buffer, size_t buffer_length)
 794{
 795	int rc;
 796	int pci_direction;
 797	struct pqi_raid_path_request request;
 798
 799	rc = pqi_build_raid_path_request(ctrl_info, &request,
 800		cmd, RAID_CTLR_LUNID, buffer, buffer_length, 0, &pci_direction);
 801	if (rc)
 802		return rc;
 803
 804	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
 805		NULL, NO_TIMEOUT);
 806
 807	pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
 808		pci_direction);
 809
 810	return rc;
 811}
 812
 813static int pqi_report_phys_logical_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 814	void **buffer)
 815{
 816	int rc;
 817	size_t lun_list_length;
 818	size_t lun_data_length;
 819	size_t new_lun_list_length;
 820	void *lun_data = NULL;
 821	struct report_lun_header *report_lun_header;
 822
 823	report_lun_header = kmalloc(sizeof(*report_lun_header), GFP_KERNEL);
 824	if (!report_lun_header) {
 825		rc = -ENOMEM;
 826		goto out;
 827	}
 828
 829	rc = pqi_report_luns(ctrl_info, cmd, report_lun_header,
 830		sizeof(*report_lun_header));
 831	if (rc)
 832		goto out;
 833
 834	lun_list_length = get_unaligned_be32(&report_lun_header->list_length);
 835
 836again:
 837	lun_data_length = sizeof(struct report_lun_header) + lun_list_length;
 838
 839	lun_data = kmalloc(lun_data_length, GFP_KERNEL);
 840	if (!lun_data) {
 841		rc = -ENOMEM;
 842		goto out;
 843	}
 844
 845	if (lun_list_length == 0) {
 846		memcpy(lun_data, report_lun_header, sizeof(*report_lun_header));
 847		goto out;
 848	}
 849
 850	rc = pqi_report_luns(ctrl_info, cmd, lun_data, lun_data_length);
 851	if (rc)
 852		goto out;
 853
 854	new_lun_list_length = get_unaligned_be32(
 855		&((struct report_lun_header *)lun_data)->list_length);
 856
 857	if (new_lun_list_length > lun_list_length) {
 858		lun_list_length = new_lun_list_length;
 859		kfree(lun_data);
 860		goto again;
 861	}
 862
 863out:
 864	kfree(report_lun_header);
 865
 866	if (rc) {
 867		kfree(lun_data);
 868		lun_data = NULL;
 869	}
 870
 871	*buffer = lun_data;
 872
 873	return rc;
 874}
 875
 876static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info,
 877	void **buffer)
 878{
 879	return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS,
 880		buffer);
 881}
 882
 883static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info,
 884	void **buffer)
 885{
 886	return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_LOG, buffer);
 887}
 888
 889static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
 890	struct report_phys_lun_extended **physdev_list,
 891	struct report_log_lun_extended **logdev_list)
 892{
 893	int rc;
 894	size_t logdev_list_length;
 895	size_t logdev_data_length;
 896	struct report_log_lun_extended *internal_logdev_list;
 897	struct report_log_lun_extended *logdev_data;
 898	struct report_lun_header report_lun_header;
 899
 900	rc = pqi_report_phys_luns(ctrl_info, (void **)physdev_list);
 901	if (rc)
 902		dev_err(&ctrl_info->pci_dev->dev,
 903			"report physical LUNs failed\n");
 904
 905	rc = pqi_report_logical_luns(ctrl_info, (void **)logdev_list);
 906	if (rc)
 907		dev_err(&ctrl_info->pci_dev->dev,
 908			"report logical LUNs failed\n");
 909
 910	/*
 911	 * Tack the controller itself onto the end of the logical device list.
 912	 */
 913
 914	logdev_data = *logdev_list;
 915
 916	if (logdev_data) {
 917		logdev_list_length =
 918			get_unaligned_be32(&logdev_data->header.list_length);
 919	} else {
 920		memset(&report_lun_header, 0, sizeof(report_lun_header));
 921		logdev_data =
 922			(struct report_log_lun_extended *)&report_lun_header;
 923		logdev_list_length = 0;
 924	}
 925
 926	logdev_data_length = sizeof(struct report_lun_header) +
 927		logdev_list_length;
 928
 929	internal_logdev_list = kmalloc(logdev_data_length +
 930		sizeof(struct report_log_lun_extended), GFP_KERNEL);
 931	if (!internal_logdev_list) {
 932		kfree(*logdev_list);
 933		*logdev_list = NULL;
 934		return -ENOMEM;
 935	}
 936
 937	memcpy(internal_logdev_list, logdev_data, logdev_data_length);
 938	memset((u8 *)internal_logdev_list + logdev_data_length, 0,
 939		sizeof(struct report_log_lun_extended_entry));
 940	put_unaligned_be32(logdev_list_length +
 941		sizeof(struct report_log_lun_extended_entry),
 942		&internal_logdev_list->header.list_length);
 943
 944	kfree(*logdev_list);
 945	*logdev_list = internal_logdev_list;
 946
 947	return 0;
 948}
 949
 950static inline void pqi_set_bus_target_lun(struct pqi_scsi_dev *device,
 951	int bus, int target, int lun)
 952{
 953	device->bus = bus;
 954	device->target = target;
 955	device->lun = lun;
 956}
 957
 958static void pqi_assign_bus_target_lun(struct pqi_scsi_dev *device)
 959{
 960	u8 *scsi3addr;
 961	u32 lunid;
 962	int bus;
 963	int target;
 964	int lun;
 965
 966	scsi3addr = device->scsi3addr;
 967	lunid = get_unaligned_le32(scsi3addr);
 968
 969	if (pqi_is_hba_lunid(scsi3addr)) {
 970		/* The specified device is the controller. */
 971		pqi_set_bus_target_lun(device, PQI_HBA_BUS, 0, lunid & 0x3fff);
 972		device->target_lun_valid = true;
 973		return;
 974	}
 975
 976	if (pqi_is_logical_device(device)) {
 977		if (device->is_external_raid_device) {
 978			bus = PQI_EXTERNAL_RAID_VOLUME_BUS;
 979			target = (lunid >> 16) & 0x3fff;
 980			lun = lunid & 0xff;
 981		} else {
 982			bus = PQI_RAID_VOLUME_BUS;
 983			target = 0;
 984			lun = lunid & 0x3fff;
 985		}
 986		pqi_set_bus_target_lun(device, bus, target, lun);
 987		device->target_lun_valid = true;
 988		return;
 989	}
 990
 991	/*
 992	 * Defer target and LUN assignment for non-controller physical devices
 993	 * because the SAS transport layer will make these assignments later.
 994	 */
 995	pqi_set_bus_target_lun(device, PQI_PHYSICAL_DEVICE_BUS, 0, 0);
 996}
 997
 998static void pqi_get_raid_level(struct pqi_ctrl_info *ctrl_info,
 999	struct pqi_scsi_dev *device)
1000{
1001	int rc;
1002	u8 raid_level;
1003	u8 *buffer;
1004
1005	raid_level = SA_RAID_UNKNOWN;
1006
1007	buffer = kmalloc(64, GFP_KERNEL);
1008	if (buffer) {
1009		rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1010			VPD_PAGE | CISS_VPD_LV_DEVICE_GEOMETRY, buffer, 64);
1011		if (rc == 0) {
1012			raid_level = buffer[8];
1013			if (raid_level > SA_RAID_MAX)
1014				raid_level = SA_RAID_UNKNOWN;
1015		}
1016		kfree(buffer);
1017	}
1018
1019	device->raid_level = raid_level;
1020}
1021
1022static int pqi_validate_raid_map(struct pqi_ctrl_info *ctrl_info,
1023	struct pqi_scsi_dev *device, struct raid_map *raid_map)
1024{
1025	char *err_msg;
1026	u32 raid_map_size;
1027	u32 r5or6_blocks_per_row;
1028	unsigned int num_phys_disks;
1029	unsigned int num_raid_map_entries;
1030
1031	raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1032
1033	if (raid_map_size < offsetof(struct raid_map, disk_data)) {
1034		err_msg = "RAID map too small";
1035		goto bad_raid_map;
1036	}
1037
1038	if (raid_map_size > sizeof(*raid_map)) {
1039		err_msg = "RAID map too large";
1040		goto bad_raid_map;
1041	}
1042
1043	num_phys_disks = get_unaligned_le16(&raid_map->layout_map_count) *
1044		(get_unaligned_le16(&raid_map->data_disks_per_row) +
1045		get_unaligned_le16(&raid_map->metadata_disks_per_row));
1046	num_raid_map_entries = num_phys_disks *
1047		get_unaligned_le16(&raid_map->row_cnt);
1048
1049	if (num_raid_map_entries > RAID_MAP_MAX_ENTRIES) {
1050		err_msg = "invalid number of map entries in RAID map";
1051		goto bad_raid_map;
1052	}
1053
1054	if (device->raid_level == SA_RAID_1) {
1055		if (get_unaligned_le16(&raid_map->layout_map_count) != 2) {
1056			err_msg = "invalid RAID-1 map";
1057			goto bad_raid_map;
1058		}
1059	} else if (device->raid_level == SA_RAID_ADM) {
1060		if (get_unaligned_le16(&raid_map->layout_map_count) != 3) {
1061			err_msg = "invalid RAID-1(ADM) map";
1062			goto bad_raid_map;
1063		}
1064	} else if ((device->raid_level == SA_RAID_5 ||
1065		device->raid_level == SA_RAID_6) &&
1066		get_unaligned_le16(&raid_map->layout_map_count) > 1) {
1067		/* RAID 50/60 */
1068		r5or6_blocks_per_row =
1069			get_unaligned_le16(&raid_map->strip_size) *
1070			get_unaligned_le16(&raid_map->data_disks_per_row);
1071		if (r5or6_blocks_per_row == 0) {
1072			err_msg = "invalid RAID-5 or RAID-6 map";
1073			goto bad_raid_map;
1074		}
1075	}
1076
1077	return 0;
1078
1079bad_raid_map:
1080	dev_warn(&ctrl_info->pci_dev->dev,
1081		"logical device %08x%08x %s\n",
1082		*((u32 *)&device->scsi3addr),
1083		*((u32 *)&device->scsi3addr[4]), err_msg);
1084
1085	return -EINVAL;
1086}
1087
1088static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info,
1089	struct pqi_scsi_dev *device)
1090{
1091	int rc;
1092	int pci_direction;
1093	struct pqi_raid_path_request request;
1094	struct raid_map *raid_map;
1095
1096	raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL);
1097	if (!raid_map)
1098		return -ENOMEM;
1099
1100	rc = pqi_build_raid_path_request(ctrl_info, &request,
1101		CISS_GET_RAID_MAP, device->scsi3addr, raid_map,
1102		sizeof(*raid_map), 0, &pci_direction);
1103	if (rc)
1104		goto error;
1105
1106	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
1107		NULL, NO_TIMEOUT);
1108
1109	pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
1110		pci_direction);
1111
1112	if (rc)
1113		goto error;
1114
1115	rc = pqi_validate_raid_map(ctrl_info, device, raid_map);
1116	if (rc)
1117		goto error;
1118
1119	device->raid_map = raid_map;
1120
1121	return 0;
1122
1123error:
1124	kfree(raid_map);
1125
1126	return rc;
1127}
1128
1129static void pqi_get_raid_bypass_status(struct pqi_ctrl_info *ctrl_info,
1130	struct pqi_scsi_dev *device)
1131{
1132	int rc;
1133	u8 *buffer;
1134	u8 bypass_status;
1135
1136	buffer = kmalloc(64, GFP_KERNEL);
1137	if (!buffer)
1138		return;
1139
1140	rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1141		VPD_PAGE | CISS_VPD_LV_BYPASS_STATUS, buffer, 64);
1142	if (rc)
1143		goto out;
1144
1145#define RAID_BYPASS_STATUS	4
1146#define RAID_BYPASS_CONFIGURED	0x1
1147#define RAID_BYPASS_ENABLED	0x2
1148
1149	bypass_status = buffer[RAID_BYPASS_STATUS];
1150	device->raid_bypass_configured =
1151		(bypass_status & RAID_BYPASS_CONFIGURED) != 0;
1152	if (device->raid_bypass_configured &&
1153		(bypass_status & RAID_BYPASS_ENABLED) &&
1154		pqi_get_raid_map(ctrl_info, device) == 0)
1155		device->raid_bypass_enabled = true;
1156
1157out:
1158	kfree(buffer);
1159}
1160
1161/*
1162 * Use vendor-specific VPD to determine online/offline status of a volume.
1163 */
1164
1165static void pqi_get_volume_status(struct pqi_ctrl_info *ctrl_info,
1166	struct pqi_scsi_dev *device)
1167{
1168	int rc;
1169	size_t page_length;
1170	u8 volume_status = CISS_LV_STATUS_UNAVAILABLE;
1171	bool volume_offline = true;
1172	u32 volume_flags;
1173	struct ciss_vpd_logical_volume_status *vpd;
1174
1175	vpd = kmalloc(sizeof(*vpd), GFP_KERNEL);
1176	if (!vpd)
1177		goto no_buffer;
1178
1179	rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1180		VPD_PAGE | CISS_VPD_LV_STATUS, vpd, sizeof(*vpd));
1181	if (rc)
1182		goto out;
1183
1184	page_length = offsetof(struct ciss_vpd_logical_volume_status,
1185		volume_status) + vpd->page_length;
1186	if (page_length < sizeof(*vpd))
1187		goto out;
1188
1189	volume_status = vpd->volume_status;
1190	volume_flags = get_unaligned_be32(&vpd->flags);
1191	volume_offline = (volume_flags & CISS_LV_FLAGS_NO_HOST_IO) != 0;
1192
1193out:
1194	kfree(vpd);
1195no_buffer:
1196	device->volume_status = volume_status;
1197	device->volume_offline = volume_offline;
1198}
1199
1200static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info,
1201	struct pqi_scsi_dev *device)
1202{
1203	int rc;
1204	u8 *buffer;
1205
1206	buffer = kmalloc(64, GFP_KERNEL);
1207	if (!buffer)
1208		return -ENOMEM;
1209
1210	/* Send an inquiry to the device to see what it is. */
1211	rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, 0, buffer, 64);
1212	if (rc)
1213		goto out;
1214
1215	scsi_sanitize_inquiry_string(&buffer[8], 8);
1216	scsi_sanitize_inquiry_string(&buffer[16], 16);
1217
1218	device->devtype = buffer[0] & 0x1f;
1219	memcpy(device->vendor, &buffer[8], sizeof(device->vendor));
1220	memcpy(device->model, &buffer[16], sizeof(device->model));
1221
1222	if (pqi_is_logical_device(device) && device->devtype == TYPE_DISK) {
1223		if (device->is_external_raid_device) {
1224			device->raid_level = SA_RAID_UNKNOWN;
1225			device->volume_status = CISS_LV_OK;
1226			device->volume_offline = false;
1227		} else {
1228			pqi_get_raid_level(ctrl_info, device);
1229			pqi_get_raid_bypass_status(ctrl_info, device);
1230			pqi_get_volume_status(ctrl_info, device);
1231		}
1232	}
1233
1234out:
1235	kfree(buffer);
1236
1237	return rc;
1238}
1239
1240static void pqi_get_physical_disk_info(struct pqi_ctrl_info *ctrl_info,
1241	struct pqi_scsi_dev *device,
1242	struct bmic_identify_physical_device *id_phys)
1243{
1244	int rc;
1245
1246	memset(id_phys, 0, sizeof(*id_phys));
1247
1248	rc = pqi_identify_physical_device(ctrl_info, device,
1249		id_phys, sizeof(*id_phys));
1250	if (rc) {
1251		device->queue_depth = PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH;
1252		return;
1253	}
1254
1255	device->queue_depth =
1256		get_unaligned_le16(&id_phys->current_queue_depth_limit);
1257	device->device_type = id_phys->device_type;
1258	device->active_path_index = id_phys->active_path_number;
1259	device->path_map = id_phys->redundant_path_present_map;
1260	memcpy(&device->box,
1261		&id_phys->alternate_paths_phys_box_on_port,
1262		sizeof(device->box));
1263	memcpy(&device->phys_connector,
1264		&id_phys->alternate_paths_phys_connector,
1265		sizeof(device->phys_connector));
1266	device->bay = id_phys->phys_bay_in_box;
1267}
1268
1269static void pqi_show_volume_status(struct pqi_ctrl_info *ctrl_info,
1270	struct pqi_scsi_dev *device)
1271{
1272	char *status;
1273	static const char unknown_state_str[] =
1274		"Volume is in an unknown state (%u)";
1275	char unknown_state_buffer[sizeof(unknown_state_str) + 10];
1276
1277	switch (device->volume_status) {
1278	case CISS_LV_OK:
1279		status = "Volume online";
1280		break;
1281	case CISS_LV_FAILED:
1282		status = "Volume failed";
1283		break;
1284	case CISS_LV_NOT_CONFIGURED:
1285		status = "Volume not configured";
1286		break;
1287	case CISS_LV_DEGRADED:
1288		status = "Volume degraded";
1289		break;
1290	case CISS_LV_READY_FOR_RECOVERY:
1291		status = "Volume ready for recovery operation";
1292		break;
1293	case CISS_LV_UNDERGOING_RECOVERY:
1294		status = "Volume undergoing recovery";
1295		break;
1296	case CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED:
1297		status = "Wrong physical drive was replaced";
1298		break;
1299	case CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM:
1300		status = "A physical drive not properly connected";
1301		break;
1302	case CISS_LV_HARDWARE_OVERHEATING:
1303		status = "Hardware is overheating";
1304		break;
1305	case CISS_LV_HARDWARE_HAS_OVERHEATED:
1306		status = "Hardware has overheated";
1307		break;
1308	case CISS_LV_UNDERGOING_EXPANSION:
1309		status = "Volume undergoing expansion";
1310		break;
1311	case CISS_LV_NOT_AVAILABLE:
1312		status = "Volume waiting for transforming volume";
1313		break;
1314	case CISS_LV_QUEUED_FOR_EXPANSION:
1315		status = "Volume queued for expansion";
1316		break;
1317	case CISS_LV_DISABLED_SCSI_ID_CONFLICT:
1318		status = "Volume disabled due to SCSI ID conflict";
1319		break;
1320	case CISS_LV_EJECTED:
1321		status = "Volume has been ejected";
1322		break;
1323	case CISS_LV_UNDERGOING_ERASE:
1324		status = "Volume undergoing background erase";
1325		break;
1326	case CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD:
1327		status = "Volume ready for predictive spare rebuild";
1328		break;
1329	case CISS_LV_UNDERGOING_RPI:
1330		status = "Volume undergoing rapid parity initialization";
1331		break;
1332	case CISS_LV_PENDING_RPI:
1333		status = "Volume queued for rapid parity initialization";
1334		break;
1335	case CISS_LV_ENCRYPTED_NO_KEY:
1336		status = "Encrypted volume inaccessible - key not present";
1337		break;
1338	case CISS_LV_UNDERGOING_ENCRYPTION:
1339		status = "Volume undergoing encryption process";
1340		break;
1341	case CISS_LV_UNDERGOING_ENCRYPTION_REKEYING:
1342		status = "Volume undergoing encryption re-keying process";
1343		break;
1344	case CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
1345		status = "Volume encrypted but encryption is disabled";
1346		break;
1347	case CISS_LV_PENDING_ENCRYPTION:
1348		status = "Volume pending migration to encrypted state";
1349		break;
1350	case CISS_LV_PENDING_ENCRYPTION_REKEYING:
1351		status = "Volume pending encryption rekeying";
1352		break;
1353	case CISS_LV_NOT_SUPPORTED:
1354		status = "Volume not supported on this controller";
1355		break;
1356	case CISS_LV_STATUS_UNAVAILABLE:
1357		status = "Volume status not available";
1358		break;
1359	default:
1360		snprintf(unknown_state_buffer, sizeof(unknown_state_buffer),
1361			unknown_state_str, device->volume_status);
1362		status = unknown_state_buffer;
1363		break;
1364	}
1365
1366	dev_info(&ctrl_info->pci_dev->dev,
1367		"scsi %d:%d:%d:%d %s\n",
1368		ctrl_info->scsi_host->host_no,
1369		device->bus, device->target, device->lun, status);
1370}
1371
1372static void pqi_rescan_worker(struct work_struct *work)
1373{
1374	struct pqi_ctrl_info *ctrl_info;
1375
1376	ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1377		rescan_work);
1378
1379	pqi_scan_scsi_devices(ctrl_info);
1380}
1381
1382static int pqi_add_device(struct pqi_ctrl_info *ctrl_info,
1383	struct pqi_scsi_dev *device)
1384{
1385	int rc;
1386
1387	if (pqi_is_logical_device(device))
1388		rc = scsi_add_device(ctrl_info->scsi_host, device->bus,
1389			device->target, device->lun);
1390	else
1391		rc = pqi_add_sas_device(ctrl_info->sas_host, device);
1392
1393	return rc;
1394}
1395
1396static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info,
1397	struct pqi_scsi_dev *device)
1398{
1399	if (pqi_is_logical_device(device))
1400		scsi_remove_device(device->sdev);
1401	else
1402		pqi_remove_sas_device(device);
1403}
1404
1405/* Assumes the SCSI device list lock is held. */
1406
1407static struct pqi_scsi_dev *pqi_find_scsi_dev(struct pqi_ctrl_info *ctrl_info,
1408	int bus, int target, int lun)
1409{
1410	struct pqi_scsi_dev *device;
1411
1412	list_for_each_entry(device, &ctrl_info->scsi_device_list,
1413		scsi_device_list_entry)
1414		if (device->bus == bus && device->target == target &&
1415			device->lun == lun)
1416			return device;
1417
1418	return NULL;
1419}
1420
1421static inline bool pqi_device_equal(struct pqi_scsi_dev *dev1,
1422	struct pqi_scsi_dev *dev2)
1423{
1424	if (dev1->is_physical_device != dev2->is_physical_device)
1425		return false;
1426
1427	if (dev1->is_physical_device)
1428		return dev1->wwid == dev2->wwid;
1429
1430	return memcmp(dev1->volume_id, dev2->volume_id,
1431		sizeof(dev1->volume_id)) == 0;
1432}
1433
1434enum pqi_find_result {
1435	DEVICE_NOT_FOUND,
1436	DEVICE_CHANGED,
1437	DEVICE_SAME,
1438};
1439
1440static enum pqi_find_result pqi_scsi_find_entry(struct pqi_ctrl_info *ctrl_info,
1441	struct pqi_scsi_dev *device_to_find,
1442	struct pqi_scsi_dev **matching_device)
1443{
1444	struct pqi_scsi_dev *device;
1445
1446	list_for_each_entry(device, &ctrl_info->scsi_device_list,
1447		scsi_device_list_entry) {
1448		if (pqi_scsi3addr_equal(device_to_find->scsi3addr,
1449			device->scsi3addr)) {
1450			*matching_device = device;
1451			if (pqi_device_equal(device_to_find, device)) {
1452				if (device_to_find->volume_offline)
1453					return DEVICE_CHANGED;
1454				return DEVICE_SAME;
1455			}
1456			return DEVICE_CHANGED;
1457		}
1458	}
1459
1460	return DEVICE_NOT_FOUND;
1461}
1462
1463#define PQI_DEV_INFO_BUFFER_LENGTH	128
1464
1465static void pqi_dev_info(struct pqi_ctrl_info *ctrl_info,
1466	char *action, struct pqi_scsi_dev *device)
1467{
1468	ssize_t count;
1469	char buffer[PQI_DEV_INFO_BUFFER_LENGTH];
1470
1471	count = snprintf(buffer, PQI_DEV_INFO_BUFFER_LENGTH,
1472		"%d:%d:", ctrl_info->scsi_host->host_no, device->bus);
1473
1474	if (device->target_lun_valid)
1475		count += snprintf(buffer + count,
1476			PQI_DEV_INFO_BUFFER_LENGTH - count,
1477			"%d:%d",
1478			device->target,
1479			device->lun);
1480	else
1481		count += snprintf(buffer + count,
1482			PQI_DEV_INFO_BUFFER_LENGTH - count,
1483			"-:-");
1484
1485	if (pqi_is_logical_device(device))
1486		count += snprintf(buffer + count,
1487			PQI_DEV_INFO_BUFFER_LENGTH - count,
1488			" %08x%08x",
1489			*((u32 *)&device->scsi3addr),
1490			*((u32 *)&device->scsi3addr[4]));
1491	else
1492		count += snprintf(buffer + count,
1493			PQI_DEV_INFO_BUFFER_LENGTH - count,
1494			" %016llx", device->sas_address);
1495
1496	count += snprintf(buffer + count, PQI_DEV_INFO_BUFFER_LENGTH - count,
1497		" %s %.8s %.16s ",
1498		scsi_device_type(device->devtype),
1499		device->vendor,
1500		device->model);
1501
1502	if (pqi_is_logical_device(device)) {
1503		if (device->devtype == TYPE_DISK)
1504			count += snprintf(buffer + count,
1505				PQI_DEV_INFO_BUFFER_LENGTH - count,
1506				"SSDSmartPathCap%c En%c %-12s",
1507				device->raid_bypass_configured ? '+' : '-',
1508				device->raid_bypass_enabled ? '+' : '-',
1509				pqi_raid_level_to_string(device->raid_level));
1510	} else {
1511		count += snprintf(buffer + count,
1512			PQI_DEV_INFO_BUFFER_LENGTH - count,
1513			"AIO%c", device->aio_enabled ? '+' : '-');
1514		if (device->devtype == TYPE_DISK ||
1515			device->devtype == TYPE_ZBC)
1516			count += snprintf(buffer + count,
1517				PQI_DEV_INFO_BUFFER_LENGTH - count,
1518				" qd=%-6d", device->queue_depth);
1519	}
1520
1521	dev_info(&ctrl_info->pci_dev->dev, "%s %s\n", action, buffer);
1522}
1523
1524/* Assumes the SCSI device list lock is held. */
1525
1526static void pqi_scsi_update_device(struct pqi_scsi_dev *existing_device,
1527	struct pqi_scsi_dev *new_device)
1528{
1529	existing_device->devtype = new_device->devtype;
1530	existing_device->device_type = new_device->device_type;
1531	existing_device->bus = new_device->bus;
1532	if (new_device->target_lun_valid) {
1533		existing_device->target = new_device->target;
1534		existing_device->lun = new_device->lun;
1535		existing_device->target_lun_valid = true;
1536	}
1537
1538	/* By definition, the scsi3addr and wwid fields are already the same. */
1539
1540	existing_device->is_physical_device = new_device->is_physical_device;
1541	existing_device->is_external_raid_device =
1542		new_device->is_external_raid_device;
1543	existing_device->aio_enabled = new_device->aio_enabled;
1544	memcpy(existing_device->vendor, new_device->vendor,
1545		sizeof(existing_device->vendor));
1546	memcpy(existing_device->model, new_device->model,
1547		sizeof(existing_device->model));
1548	existing_device->sas_address = new_device->sas_address;
1549	existing_device->raid_level = new_device->raid_level;
1550	existing_device->queue_depth = new_device->queue_depth;
1551	existing_device->aio_handle = new_device->aio_handle;
1552	existing_device->volume_status = new_device->volume_status;
1553	existing_device->active_path_index = new_device->active_path_index;
1554	existing_device->path_map = new_device->path_map;
1555	existing_device->bay = new_device->bay;
1556	memcpy(existing_device->box, new_device->box,
1557		sizeof(existing_device->box));
1558	memcpy(existing_device->phys_connector, new_device->phys_connector,
1559		sizeof(existing_device->phys_connector));
1560	existing_device->offload_to_mirror = 0;
1561	kfree(existing_device->raid_map);
1562	existing_device->raid_map = new_device->raid_map;
1563	existing_device->raid_bypass_configured =
1564		new_device->raid_bypass_configured;
1565	existing_device->raid_bypass_enabled =
1566		new_device->raid_bypass_enabled;
1567
1568	/* To prevent this from being freed later. */
1569	new_device->raid_map = NULL;
1570}
1571
1572static inline void pqi_free_device(struct pqi_scsi_dev *device)
1573{
1574	if (device) {
1575		kfree(device->raid_map);
1576		kfree(device);
1577	}
1578}
1579
1580/*
1581 * Called when exposing a new device to the OS fails in order to re-adjust
1582 * our internal SCSI device list to match the SCSI ML's view.
1583 */
1584
1585static inline void pqi_fixup_botched_add(struct pqi_ctrl_info *ctrl_info,
1586	struct pqi_scsi_dev *device)
1587{
1588	unsigned long flags;
1589
1590	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1591	list_del(&device->scsi_device_list_entry);
1592	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1593
1594	/* Allow the device structure to be freed later. */
1595	device->keep_device = false;
1596}
1597
1598static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info,
1599	struct pqi_scsi_dev *new_device_list[], unsigned int num_new_devices)
1600{
1601	int rc;
1602	unsigned int i;
1603	unsigned long flags;
1604	enum pqi_find_result find_result;
1605	struct pqi_scsi_dev *device;
1606	struct pqi_scsi_dev *next;
1607	struct pqi_scsi_dev *matching_device;
1608	LIST_HEAD(add_list);
1609	LIST_HEAD(delete_list);
1610
1611	/*
1612	 * The idea here is to do as little work as possible while holding the
1613	 * spinlock.  That's why we go to great pains to defer anything other
1614	 * than updating the internal device list until after we release the
1615	 * spinlock.
1616	 */
1617
1618	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1619
1620	/* Assume that all devices in the existing list have gone away. */
1621	list_for_each_entry(device, &ctrl_info->scsi_device_list,
1622		scsi_device_list_entry)
1623		device->device_gone = true;
1624
1625	for (i = 0; i < num_new_devices; i++) {
1626		device = new_device_list[i];
1627
1628		find_result = pqi_scsi_find_entry(ctrl_info, device,
1629						&matching_device);
1630
1631		switch (find_result) {
1632		case DEVICE_SAME:
1633			/*
1634			 * The newly found device is already in the existing
1635			 * device list.
1636			 */
1637			device->new_device = false;
1638			matching_device->device_gone = false;
1639			pqi_scsi_update_device(matching_device, device);
1640			break;
1641		case DEVICE_NOT_FOUND:
1642			/*
1643			 * The newly found device is NOT in the existing device
1644			 * list.
1645			 */
1646			device->new_device = true;
1647			break;
1648		case DEVICE_CHANGED:
1649			/*
1650			 * The original device has gone away and we need to add
1651			 * the new device.
1652			 */
1653			device->new_device = true;
1654			break;
1655		}
1656	}
1657
1658	/* Process all devices that have gone away. */
1659	list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
1660		scsi_device_list_entry) {
1661		if (device->device_gone) {
1662			list_del(&device->scsi_device_list_entry);
1663			list_add_tail(&device->delete_list_entry, &delete_list);
1664		}
1665	}
1666
1667	/* Process all new devices. */
1668	for (i = 0; i < num_new_devices; i++) {
1669		device = new_device_list[i];
1670		if (!device->new_device)
1671			continue;
1672		if (device->volume_offline)
1673			continue;
1674		list_add_tail(&device->scsi_device_list_entry,
1675			&ctrl_info->scsi_device_list);
1676		list_add_tail(&device->add_list_entry, &add_list);
1677		/* To prevent this device structure from being freed later. */
1678		device->keep_device = true;
1679	}
1680
1681	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1682
1683	/* Remove all devices that have gone away. */
1684	list_for_each_entry_safe(device, next, &delete_list,
1685		delete_list_entry) {
1686		if (device->volume_offline) {
1687			pqi_dev_info(ctrl_info, "offline", device);
1688			pqi_show_volume_status(ctrl_info, device);
1689		} else {
1690			pqi_dev_info(ctrl_info, "removed", device);
1691		}
1692		if (device->sdev)
1693			pqi_remove_device(ctrl_info, device);
1694		list_del(&device->delete_list_entry);
1695		pqi_free_device(device);
1696	}
1697
1698	/*
1699	 * Notify the SCSI ML if the queue depth of any existing device has
1700	 * changed.
1701	 */
1702	list_for_each_entry(device, &ctrl_info->scsi_device_list,
1703		scsi_device_list_entry) {
1704		if (device->sdev && device->queue_depth !=
1705			device->advertised_queue_depth) {
1706			device->advertised_queue_depth = device->queue_depth;
1707			scsi_change_queue_depth(device->sdev,
1708				device->advertised_queue_depth);
1709		}
1710	}
1711
1712	/* Expose any new devices. */
1713	list_for_each_entry_safe(device, next, &add_list, add_list_entry) {
1714		if (!device->sdev) {
1715			pqi_dev_info(ctrl_info, "added", device);
1716			rc = pqi_add_device(ctrl_info, device);
1717			if (rc) {
1718				dev_warn(&ctrl_info->pci_dev->dev,
1719					"scsi %d:%d:%d:%d addition failed, device not added\n",
1720					ctrl_info->scsi_host->host_no,
1721					device->bus, device->target,
1722					device->lun);
1723				pqi_fixup_botched_add(ctrl_info, device);
1724			}
1725		}
1726	}
1727}
1728
1729static bool pqi_is_supported_device(struct pqi_scsi_dev *device)
1730{
1731	bool is_supported = false;
1732
1733	switch (device->devtype) {
1734	case TYPE_DISK:
1735	case TYPE_ZBC:
1736	case TYPE_TAPE:
1737	case TYPE_MEDIUM_CHANGER:
1738	case TYPE_ENCLOSURE:
1739		is_supported = true;
1740		break;
1741	case TYPE_RAID:
1742		/*
1743		 * Only support the HBA controller itself as a RAID
1744		 * controller.  If it's a RAID controller other than
1745		 * the HBA itself (an external RAID controller, for
1746		 * example), we don't support it.
1747		 */
1748		if (pqi_is_hba_lunid(device->scsi3addr))
1749			is_supported = true;
1750		break;
1751	}
1752
1753	return is_supported;
1754}
1755
1756static inline bool pqi_skip_device(u8 *scsi3addr)
1757{
1758	/* Ignore all masked devices. */
1759	if (MASKED_DEVICE(scsi3addr))
1760		return true;
1761
1762	return false;
1763}
1764
1765static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1766{
1767	int i;
1768	int rc;
1769	LIST_HEAD(new_device_list_head);
1770	struct report_phys_lun_extended *physdev_list = NULL;
1771	struct report_log_lun_extended *logdev_list = NULL;
1772	struct report_phys_lun_extended_entry *phys_lun_ext_entry;
1773	struct report_log_lun_extended_entry *log_lun_ext_entry;
1774	struct bmic_identify_physical_device *id_phys = NULL;
1775	u32 num_physicals;
1776	u32 num_logicals;
1777	struct pqi_scsi_dev **new_device_list = NULL;
1778	struct pqi_scsi_dev *device;
1779	struct pqi_scsi_dev *next;
1780	unsigned int num_new_devices;
1781	unsigned int num_valid_devices;
1782	bool is_physical_device;
1783	u8 *scsi3addr;
1784	static char *out_of_memory_msg =
1785		"failed to allocate memory, device discovery stopped";
1786
1787	rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list);
1788	if (rc)
1789		goto out;
1790
1791	if (physdev_list)
1792		num_physicals =
1793			get_unaligned_be32(&physdev_list->header.list_length)
1794				/ sizeof(physdev_list->lun_entries[0]);
1795	else
1796		num_physicals = 0;
1797
1798	if (logdev_list)
1799		num_logicals =
1800			get_unaligned_be32(&logdev_list->header.list_length)
1801				/ sizeof(logdev_list->lun_entries[0]);
1802	else
1803		num_logicals = 0;
1804
1805	if (num_physicals) {
1806		/*
1807		 * We need this buffer for calls to pqi_get_physical_disk_info()
1808		 * below.  We allocate it here instead of inside
1809		 * pqi_get_physical_disk_info() because it's a fairly large
1810		 * buffer.
1811		 */
1812		id_phys = kmalloc(sizeof(*id_phys), GFP_KERNEL);
1813		if (!id_phys) {
1814			dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1815				out_of_memory_msg);
1816			rc = -ENOMEM;
1817			goto out;
1818		}
1819	}
1820
1821	num_new_devices = num_physicals + num_logicals;
1822
1823	new_device_list = kmalloc(sizeof(*new_device_list) *
1824		num_new_devices, GFP_KERNEL);
1825	if (!new_device_list) {
1826		dev_warn(&ctrl_info->pci_dev->dev, "%s\n", out_of_memory_msg);
1827		rc = -ENOMEM;
1828		goto out;
1829	}
1830
1831	for (i = 0; i < num_new_devices; i++) {
1832		device = kzalloc(sizeof(*device), GFP_KERNEL);
1833		if (!device) {
1834			dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1835				out_of_memory_msg);
1836			rc = -ENOMEM;
1837			goto out;
1838		}
1839		list_add_tail(&device->new_device_list_entry,
1840			&new_device_list_head);
1841	}
1842
1843	device = NULL;
1844	num_valid_devices = 0;
1845
1846	for (i = 0; i < num_new_devices; i++) {
1847
1848		if (i < num_physicals) {
1849			is_physical_device = true;
1850			phys_lun_ext_entry = &physdev_list->lun_entries[i];
1851			log_lun_ext_entry = NULL;
1852			scsi3addr = phys_lun_ext_entry->lunid;
1853		} else {
1854			is_physical_device = false;
1855			phys_lun_ext_entry = NULL;
1856			log_lun_ext_entry =
1857				&logdev_list->lun_entries[i - num_physicals];
1858			scsi3addr = log_lun_ext_entry->lunid;
1859		}
1860
1861		if (is_physical_device && pqi_skip_device(scsi3addr))
1862			continue;
1863
1864		if (device)
1865			device = list_next_entry(device, new_device_list_entry);
1866		else
1867			device = list_first_entry(&new_device_list_head,
1868				struct pqi_scsi_dev, new_device_list_entry);
1869
1870		memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
1871		device->is_physical_device = is_physical_device;
1872		if (!is_physical_device)
1873			device->is_external_raid_device =
1874				pqi_is_external_raid_addr(scsi3addr);
1875
1876		/* Gather information about the device. */
1877		rc = pqi_get_device_info(ctrl_info, device);
1878		if (rc == -ENOMEM) {
1879			dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1880				out_of_memory_msg);
1881			goto out;
1882		}
1883		if (rc) {
1884			if (device->is_physical_device)
1885				dev_warn(&ctrl_info->pci_dev->dev,
1886					"obtaining device info failed, skipping physical device %016llx\n",
1887					get_unaligned_be64(
1888						&phys_lun_ext_entry->wwid));
1889			else
1890				dev_warn(&ctrl_info->pci_dev->dev,
1891					"obtaining device info failed, skipping logical device %08x%08x\n",
1892					*((u32 *)&device->scsi3addr),
1893					*((u32 *)&device->scsi3addr[4]));
1894			rc = 0;
1895			continue;
1896		}
1897
1898		if (!pqi_is_supported_device(device))
1899			continue;
1900
1901		pqi_assign_bus_target_lun(device);
1902
1903		if (device->is_physical_device) {
1904			device->wwid = phys_lun_ext_entry->wwid;
1905			if ((phys_lun_ext_entry->device_flags &
1906				REPORT_PHYS_LUN_DEV_FLAG_AIO_ENABLED) &&
1907				phys_lun_ext_entry->aio_handle)
1908				device->aio_enabled = true;
1909		} else {
1910			memcpy(device->volume_id, log_lun_ext_entry->volume_id,
1911				sizeof(device->volume_id));
1912		}
1913
1914		switch (device->devtype) {
1915		case TYPE_DISK:
1916		case TYPE_ZBC:
1917		case TYPE_ENCLOSURE:
1918			if (device->is_physical_device) {
1919				device->sas_address =
1920					get_unaligned_be64(&device->wwid);
1921				if (device->devtype == TYPE_DISK ||
1922					device->devtype == TYPE_ZBC) {
1923					device->aio_handle =
1924						phys_lun_ext_entry->aio_handle;
1925					pqi_get_physical_disk_info(ctrl_info,
1926						device, id_phys);
1927				}
1928			}
1929			break;
1930		}
1931
1932		new_device_list[num_valid_devices++] = device;
1933	}
1934
1935	pqi_update_device_list(ctrl_info, new_device_list, num_valid_devices);
1936
1937out:
1938	list_for_each_entry_safe(device, next, &new_device_list_head,
1939		new_device_list_entry) {
1940		if (device->keep_device)
1941			continue;
1942		list_del(&device->new_device_list_entry);
1943		pqi_free_device(device);
1944	}
1945
1946	kfree(new_device_list);
1947	kfree(physdev_list);
1948	kfree(logdev_list);
1949	kfree(id_phys);
1950
1951	return rc;
1952}
1953
1954static void pqi_remove_all_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1955{
1956	unsigned long flags;
1957	struct pqi_scsi_dev *device;
1958
1959	while (1) {
1960		spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1961
1962		device = list_first_entry_or_null(&ctrl_info->scsi_device_list,
1963			struct pqi_scsi_dev, scsi_device_list_entry);
1964		if (device)
1965			list_del(&device->scsi_device_list_entry);
1966
1967		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
1968			flags);
1969
1970		if (!device)
1971			break;
1972
1973		if (device->sdev)
1974			pqi_remove_device(ctrl_info, device);
1975		pqi_free_device(device);
1976	}
1977}
1978
1979static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1980{
1981	int rc;
1982
1983	if (pqi_ctrl_offline(ctrl_info))
1984		return -ENXIO;
1985
1986	mutex_lock(&ctrl_info->scan_mutex);
1987
1988	rc = pqi_update_scsi_devices(ctrl_info);
1989	if (rc)
1990		pqi_schedule_rescan_worker_delayed(ctrl_info);
1991
1992	mutex_unlock(&ctrl_info->scan_mutex);
1993
1994	return rc;
1995}
1996
1997static void pqi_scan_start(struct Scsi_Host *shost)
1998{
1999	pqi_scan_scsi_devices(shost_to_hba(shost));
2000}
2001
2002/* Returns TRUE if scan is finished. */
2003
2004static int pqi_scan_finished(struct Scsi_Host *shost,
2005	unsigned long elapsed_time)
2006{
2007	struct pqi_ctrl_info *ctrl_info;
2008
2009	ctrl_info = shost_priv(shost);
2010
2011	return !mutex_is_locked(&ctrl_info->scan_mutex);
2012}
2013
2014static void pqi_wait_until_scan_finished(struct pqi_ctrl_info *ctrl_info)
2015{
2016	mutex_lock(&ctrl_info->scan_mutex);
2017	mutex_unlock(&ctrl_info->scan_mutex);
2018}
2019
2020static void pqi_wait_until_lun_reset_finished(struct pqi_ctrl_info *ctrl_info)
2021{
2022	mutex_lock(&ctrl_info->lun_reset_mutex);
2023	mutex_unlock(&ctrl_info->lun_reset_mutex);
2024}
2025
2026static inline void pqi_set_encryption_info(
2027	struct pqi_encryption_info *encryption_info, struct raid_map *raid_map,
2028	u64 first_block)
2029{
2030	u32 volume_blk_size;
2031
2032	/*
2033	 * Set the encryption tweak values based on logical block address.
2034	 * If the block size is 512, the tweak value is equal to the LBA.
2035	 * For other block sizes, tweak value is (LBA * block size) / 512.
2036	 */
2037	volume_blk_size = get_unaligned_le32(&raid_map->volume_blk_size);
2038	if (volume_blk_size != 512)
2039		first_block = (first_block * volume_blk_size) / 512;
2040
2041	encryption_info->data_encryption_key_index =
2042		get_unaligned_le16(&raid_map->data_encryption_key_index);
2043	encryption_info->encrypt_tweak_lower = lower_32_bits(first_block);
2044	encryption_info->encrypt_tweak_upper = upper_32_bits(first_block);
2045}
2046
2047/*
2048 * Attempt to perform RAID bypass mapping for a logical volume I/O.
2049 */
2050
2051#define PQI_RAID_BYPASS_INELIGIBLE	1
2052
2053static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
2054	struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
2055	struct pqi_queue_group *queue_group)
2056{
2057	struct raid_map *raid_map;
2058	bool is_write = false;
2059	u32 map_index;
2060	u64 first_block;
2061	u64 last_block;
2062	u32 block_cnt;
2063	u32 blocks_per_row;
2064	u64 first_row;
2065	u64 last_row;
2066	u32 first_row_offset;
2067	u32 last_row_offset;
2068	u32 first_column;
2069	u32 last_column;
2070	u64 r0_first_row;
2071	u64 r0_last_row;
2072	u32 r5or6_blocks_per_row;
2073	u64 r5or6_first_row;
2074	u64 r5or6_last_row;
2075	u32 r5or6_first_row_offset;
2076	u32 r5or6_last_row_offset;
2077	u32 r5or6_first_column;
2078	u32 r5or6_last_column;
2079	u16 data_disks_per_row;
2080	u32 total_disks_per_row;
2081	u16 layout_map_count;
2082	u32 stripesize;
2083	u16 strip_size;
2084	u32 first_group;
2085	u32 last_group;
2086	u32 current_group;
2087	u32 map_row;
2088	u32 aio_handle;
2089	u64 disk_block;
2090	u32 disk_block_cnt;
2091	u8 cdb[16];
2092	u8 cdb_length;
2093	int offload_to_mirror;
2094	struct pqi_encryption_info *encryption_info_ptr;
2095	struct pqi_encryption_info encryption_info;
2096#if BITS_PER_LONG == 32
2097	u64 tmpdiv;
2098#endif
2099
2100	/* Check for valid opcode, get LBA and block count. */
2101	switch (scmd->cmnd[0]) {
2102	case WRITE_6:
2103		is_write = true;
2104		/* fall through */
2105	case READ_6:
2106		first_block = (u64)(((scmd->cmnd[1] & 0x1f) << 16) |
2107			(scmd->cmnd[2] << 8) | scmd->cmnd[3]);
2108		block_cnt = (u32)scmd->cmnd[4];
2109		if (block_cnt == 0)
2110			block_cnt = 256;
2111		break;
2112	case WRITE_10:
2113		is_write = true;
2114		/* fall through */
2115	case READ_10:
2116		first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2117		block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]);
2118		break;
2119	case WRITE_12:
2120		is_write = true;
2121		/* fall through */
2122	case READ_12:
2123		first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2124		block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
2125		break;
2126	case WRITE_16:
2127		is_write = true;
2128		/* fall through */
2129	case READ_16:
2130		first_block = get_unaligned_be64(&scmd->cmnd[2]);
2131		block_cnt = get_unaligned_be32(&scmd->cmnd[10]);
2132		break;
2133	default:
2134		/* Process via normal I/O path. */
2135		return PQI_RAID_BYPASS_INELIGIBLE;
2136	}
2137
2138	/* Check for write to non-RAID-0. */
2139	if (is_write && device->raid_level != SA_RAID_0)
2140		return PQI_RAID_BYPASS_INELIGIBLE;
2141
2142	if (unlikely(block_cnt == 0))
2143		return PQI_RAID_BYPASS_INELIGIBLE;
2144
2145	last_block = first_block + block_cnt - 1;
2146	raid_map = device->raid_map;
2147
2148	/* Check for invalid block or wraparound. */
2149	if (last_block >= get_unaligned_le64(&raid_map->volume_blk_cnt) ||
2150		last_block < first_block)
2151		return PQI_RAID_BYPASS_INELIGIBLE;
2152
2153	data_disks_per_row = get_unaligned_le16(&raid_map->data_disks_per_row);
2154	strip_size = get_unaligned_le16(&raid_map->strip_size);
2155	layout_map_count = get_unaligned_le16(&raid_map->layout_map_count);
2156
2157	/* Calculate stripe information for the request. */
2158	blocks_per_row = data_disks_per_row * strip_size;
2159#if BITS_PER_LONG == 32
2160	tmpdiv = first_block;
2161	do_div(tmpdiv, blocks_per_row);
2162	first_row = tmpdiv;
2163	tmpdiv = last_block;
2164	do_div(tmpdiv, blocks_per_row);
2165	last_row = tmpdiv;
2166	first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2167	last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2168	tmpdiv = first_row_offset;
2169	do_div(tmpdiv, strip_size);
2170	first_column = tmpdiv;
2171	tmpdiv = last_row_offset;
2172	do_div(tmpdiv, strip_size);
2173	last_column = tmpdiv;
2174#else
2175	first_row = first_block / blocks_per_row;
2176	last_row = last_block / blocks_per_row;
2177	first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2178	last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2179	first_column = first_row_offset / strip_size;
2180	last_column = last_row_offset / strip_size;
2181#endif
2182
2183	/* If this isn't a single row/column then give to the controller. */
2184	if (first_row != last_row || first_column != last_column)
2185		return PQI_RAID_BYPASS_INELIGIBLE;
2186
2187	/* Proceeding with driver mapping. */
2188	total_disks_per_row = data_disks_per_row +
2189		get_unaligned_le16(&raid_map->metadata_disks_per_row);
2190	map_row = ((u32)(first_row >> raid_map->parity_rotation_shift)) %
2191		get_unaligned_le16(&raid_map->row_cnt);
2192	map_index = (map_row * total_disks_per_row) + first_column;
2193
2194	/* RAID 1 */
2195	if (device->raid_level == SA_RAID_1) {
2196		if (device->offload_to_mirror)
2197			map_index += data_disks_per_row;
2198		device->offload_to_mirror = !device->offload_to_mirror;
2199	} else if (device->raid_level == SA_RAID_ADM) {
2200		/* RAID ADM */
2201		/*
2202		 * Handles N-way mirrors  (R1-ADM) and R10 with # of drives
2203		 * divisible by 3.
2204		 */
2205		offload_to_mirror = device->offload_to_mirror;
2206		if (offload_to_mirror == 0)  {
2207			/* use physical disk in the first mirrored group. */
2208			map_index %= data_disks_per_row;
2209		} else {
2210			do {
2211				/*
2212				 * Determine mirror group that map_index
2213				 * indicates.
2214				 */
2215				current_group = map_index / data_disks_per_row;
2216
2217				if (offload_to_mirror != current_group) {
2218					if (current_group <
2219						layout_map_count - 1) {
2220						/*
2221						 * Select raid index from
2222						 * next group.
2223						 */
2224						map_index += data_disks_per_row;
2225						current_group++;
2226					} else {
2227						/*
2228						 * Select raid index from first
2229						 * group.
2230						 */
2231						map_index %= data_disks_per_row;
2232						current_group = 0;
2233					}
2234				}
2235			} while (offload_to_mirror != current_group);
2236		}
2237
2238		/* Set mirror group to use next time. */
2239		offload_to_mirror =
2240			(offload_to_mirror >= layout_map_count - 1) ?
2241				0 : offload_to_mirror + 1;
2242		WARN_ON(offload_to_mirror >= layout_map_count);
2243		device->offload_to_mirror = offload_to_mirror;
2244		/*
2245		 * Avoid direct use of device->offload_to_mirror within this
2246		 * function since multiple threads might simultaneously
2247		 * increment it beyond the range of device->layout_map_count -1.
2248		 */
2249	} else if ((device->raid_level == SA_RAID_5 ||
2250		device->raid_level == SA_RAID_6) && layout_map_count > 1) {
2251		/* RAID 50/60 */
2252		/* Verify first and last block are in same RAID group */
2253		r5or6_blocks_per_row = strip_size * data_disks_per_row;
2254		stripesize = r5or6_blocks_per_row * layout_map_count;
2255#if BITS_PER_LONG == 32
2256		tmpdiv = first_block;
2257		first_group = do_div(tmpdiv, stripesize);
2258		tmpdiv = first_group;
2259		do_div(tmpdiv, r5or6_blocks_per_row);
2260		first_group = tmpdiv;
2261		tmpdiv = last_block;
2262		last_group = do_div(tmpdiv, stripesize);
2263		tmpdiv = last_group;
2264		do_div(tmpdiv, r5or6_blocks_per_row);
2265		last_group = tmpdiv;
2266#else
2267		first_group = (first_block % stripesize) / r5or6_blocks_per_row;
2268		last_group = (last_block % stripesize) / r5or6_blocks_per_row;
2269#endif
2270		if (first_group != last_group)
2271			return PQI_RAID_BYPASS_INELIGIBLE;
2272
2273		/* Verify request is in a single row of RAID 5/6 */
2274#if BITS_PER_LONG == 32
2275		tmpdiv = first_block;
2276		do_div(tmpdiv, stripesize);
2277		first_row = r5or6_first_row = r0_first_row = tmpdiv;
2278		tmpdiv = last_block;
2279		do_div(tmpdiv, stripesize);
2280		r5or6_last_row = r0_last_row = tmpdiv;
2281#else
2282		first_row = r5or6_first_row = r0_first_row =
2283			first_block / stripesize;
2284		r5or6_last_row = r0_last_row = last_block / stripesize;
2285#endif
2286		if (r5or6_first_row != r5or6_last_row)
2287			return PQI_RAID_BYPASS_INELIGIBLE;
2288
2289		/* Verify request is in a single column */
2290#if BITS_PER_LONG == 32
2291		tmpdiv = first_block;
2292		first_row_offset = do_div(tmpdiv, stripesize);
2293		tmpdiv = first_row_offset;
2294		first_row_offset = (u32)do_div(tmpdiv, r5or6_blocks_per_row);
2295		r5or6_first_row_offset = first_row_offset;
2296		tmpdiv = last_block;
2297		r5or6_last_row_offset = do_div(tmpdiv, stripesize);
2298		tmpdiv = r5or6_last_row_offset;
2299		r5or6_last_row_offset = do_div(tmpdiv, r5or6_blocks_per_row);
2300		tmpdiv = r5or6_first_row_offset;
2301		do_div(tmpdiv, strip_size);
2302		first_column = r5or6_first_column = tmpdiv;
2303		tmpdiv = r5or6_last_row_offset;
2304		do_div(tmpdiv, strip_size);
2305		r5or6_last_column = tmpdiv;
2306#else
2307		first_row_offset = r5or6_first_row_offset =
2308			(u32)((first_block % stripesize) %
2309			r5or6_blocks_per_row);
2310
2311		r5or6_last_row_offset =
2312			(u32)((last_block % stripesize) %
2313			r5or6_blocks_per_row);
2314
2315		first_column = r5or6_first_row_offset / strip_size;
2316		r5or6_first_column = first_column;
2317		r5or6_last_column = r5or6_last_row_offset / strip_size;
2318#endif
2319		if (r5or6_first_column != r5or6_last_column)
2320			return PQI_RAID_BYPASS_INELIGIBLE;
2321
2322		/* Request is eligible */
2323		map_row =
2324			((u32)(first_row >> raid_map->parity_rotation_shift)) %
2325			get_unaligned_le16(&raid_map->row_cnt);
2326
2327		map_index = (first_group *
2328			(get_unaligned_le16(&raid_map->row_cnt) *
2329			total_disks_per_row)) +
2330			(map_row * total_disks_per_row) + first_column;
2331	}
2332
2333	if (unlikely(map_index >= RAID_MAP_MAX_ENTRIES))
2334		return PQI_RAID_BYPASS_INELIGIBLE;
2335
2336	aio_handle = raid_map->disk_data[map_index].aio_handle;
2337	disk_block = get_unaligned_le64(&raid_map->disk_starting_blk) +
2338		first_row * strip_size +
2339		(first_row_offset - first_column * strip_size);
2340	disk_block_cnt = block_cnt;
2341
2342	/* Handle differing logical/physical block sizes. */
2343	if (raid_map->phys_blk_shift) {
2344		disk_block <<= raid_map->phys_blk_shift;
2345		disk_block_cnt <<= raid_map->phys_blk_shift;
2346	}
2347
2348	if (unlikely(disk_block_cnt > 0xffff))
2349		return PQI_RAID_BYPASS_INELIGIBLE;
2350
2351	/* Build the new CDB for the physical disk I/O. */
2352	if (disk_block > 0xffffffff) {
2353		cdb[0] = is_write ? WRITE_16 : READ_16;
2354		cdb[1] = 0;
2355		put_unaligned_be64(disk_block, &cdb[2]);
2356		put_unaligned_be32(disk_block_cnt, &cdb[10]);
2357		cdb[14] = 0;
2358		cdb[15] = 0;
2359		cdb_length = 16;
2360	} else {
2361		cdb[0] = is_write ? WRITE_10 : READ_10;
2362		cdb[1] = 0;
2363		put_unaligned_be32((u32)disk_block, &cdb[2]);
2364		cdb[6] = 0;
2365		put_unaligned_be16((u16)disk_block_cnt, &cdb[7]);
2366		cdb[9] = 0;
2367		cdb_length = 10;
2368	}
2369
2370	if (get_unaligned_le16(&raid_map->flags) &
2371		RAID_MAP_ENCRYPTION_ENABLED) {
2372		pqi_set_encryption_info(&encryption_info, raid_map,
2373			first_block);
2374		encryption_info_ptr = &encryption_info;
2375	} else {
2376		encryption_info_ptr = NULL;
2377	}
2378
2379	return pqi_aio_submit_io(ctrl_info, scmd, aio_handle,
2380		cdb, cdb_length, queue_group, encryption_info_ptr, true);
2381}
2382
2383#define PQI_STATUS_IDLE		0x0
2384
2385#define PQI_CREATE_ADMIN_QUEUE_PAIR	1
2386#define PQI_DELETE_ADMIN_QUEUE_PAIR	2
2387
2388#define PQI_DEVICE_STATE_POWER_ON_AND_RESET		0x0
2389#define PQI_DEVICE_STATE_STATUS_AVAILABLE		0x1
2390#define PQI_DEVICE_STATE_ALL_REGISTERS_READY		0x2
2391#define PQI_DEVICE_STATE_ADMIN_QUEUE_PAIR_READY		0x3
2392#define PQI_DEVICE_STATE_ERROR				0x4
2393
2394#define PQI_MODE_READY_TIMEOUT_SECS		30
2395#define PQI_MODE_READY_POLL_INTERVAL_MSECS	1
2396
2397static int pqi_wait_for_pqi_mode_ready(struct pqi_ctrl_info *ctrl_info)
2398{
2399	struct pqi_device_registers __iomem *pqi_registers;
2400	unsigned long timeout;
2401	u64 signature;
2402	u8 status;
2403
2404	pqi_registers = ctrl_info->pqi_registers;
2405	timeout = (PQI_MODE_READY_TIMEOUT_SECS * HZ) + jiffies;
2406
2407	while (1) {
2408		signature = readq(&pqi_registers->signature);
2409		if (memcmp(&signature, PQI_DEVICE_SIGNATURE,
2410			sizeof(signature)) == 0)
2411			break;
2412		if (time_after(jiffies, timeout)) {
2413			dev_err(&ctrl_info->pci_dev->dev,
2414				"timed out waiting for PQI signature\n");
2415			return -ETIMEDOUT;
2416		}
2417		msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2418	}
2419
2420	while (1) {
2421		status = readb(&pqi_registers->function_and_status_code);
2422		if (status == PQI_STATUS_IDLE)
2423			break;
2424		if (time_after(jiffies, timeout)) {
2425			dev_err(&ctrl_info->pci_dev->dev,
2426				"timed out waiting for PQI IDLE\n");
2427			return -ETIMEDOUT;
2428		}
2429		msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2430	}
2431
2432	while (1) {
2433		if (readl(&pqi_registers->device_status) ==
2434			PQI_DEVICE_STATE_ALL_REGISTERS_READY)
2435			break;
2436		if (time_after(jiffies, timeout)) {
2437			dev_err(&ctrl_info->pci_dev->dev,
2438				"timed out waiting for PQI all registers ready\n");
2439			return -ETIMEDOUT;
2440		}
2441		msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2442	}
2443
2444	return 0;
2445}
2446
2447static inline void pqi_aio_path_disabled(struct pqi_io_request *io_request)
2448{
2449	struct pqi_scsi_dev *device;
2450
2451	device = io_request->scmd->device->hostdata;
2452	device->raid_bypass_enabled = false;
2453	device->aio_enabled = false;
2454}
2455
2456static inline void pqi_take_device_offline(struct scsi_device *sdev, char *path)
2457{
2458	struct pqi_ctrl_info *ctrl_info;
2459	struct pqi_scsi_dev *device;
2460
2461	device = sdev->hostdata;
2462	if (device->device_offline)
2463		return;
2464
2465	device->device_offline = true;
2466	scsi_device_set_state(sdev, SDEV_OFFLINE);
2467	ctrl_info = shost_to_hba(sdev->host);
2468	pqi_schedule_rescan_worker(ctrl_info);
2469	dev_err(&ctrl_info->pci_dev->dev, "offlined %s scsi %d:%d:%d:%d\n",
2470		path, ctrl_info->scsi_host->host_no, device->bus,
2471		device->target, device->lun);
2472}
2473
2474static void pqi_process_raid_io_error(struct pqi_io_request *io_request)
2475{
2476	u8 scsi_status;
2477	u8 host_byte;
2478	struct scsi_cmnd *scmd;
2479	struct pqi_raid_error_info *error_info;
2480	size_t sense_data_length;
2481	int residual_count;
2482	int xfer_count;
2483	struct scsi_sense_hdr sshdr;
2484
2485	scmd = io_request->scmd;
2486	if (!scmd)
2487		return;
2488
2489	error_info = io_request->error_info;
2490	scsi_status = error_info->status;
2491	host_byte = DID_OK;
2492
2493	switch (error_info->data_out_result) {
2494	case PQI_DATA_IN_OUT_GOOD:
2495		break;
2496	case PQI_DATA_IN_OUT_UNDERFLOW:
2497		xfer_count =
2498			get_unaligned_le32(&error_info->data_out_transferred);
2499		residual_count = scsi_bufflen(scmd) - xfer_count;
2500		scsi_set_resid(scmd, residual_count);
2501		if (xfer_count < scmd->underflow)
2502			host_byte = DID_SOFT_ERROR;
2503		break;
2504	case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
2505	case PQI_DATA_IN_OUT_ABORTED:
2506		host_byte = DID_ABORT;
2507		break;
2508	case PQI_DATA_IN_OUT_TIMEOUT:
2509		host_byte = DID_TIME_OUT;
2510		break;
2511	case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
2512	case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
2513	case PQI_DATA_IN_OUT_BUFFER_ERROR:
2514	case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
2515	case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
2516	case PQI_DATA_IN_OUT_ERROR:
2517	case PQI_DATA_IN_OUT_HARDWARE_ERROR:
2518	case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
2519	case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
2520	case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
2521	case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
2522	case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
2523	case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
2524	case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
2525	case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
2526	case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
2527	default:
2528		host_byte = DID_ERROR;
2529		break;
2530	}
2531
2532	sense_data_length = get_unaligned_le16(&error_info->sense_data_length);
2533	if (sense_data_length == 0)
2534		sense_data_length =
2535			get_unaligned_le16(&error_info->response_data_length);
2536	if (sense_data_length) {
2537		if (sense_data_length > sizeof(error_info->data))
2538			sense_data_length = sizeof(error_info->data);
2539
2540		if (scsi_status == SAM_STAT_CHECK_CONDITION &&
2541			scsi_normalize_sense(error_info->data,
2542				sense_data_length, &sshdr) &&
2543				sshdr.sense_key == HARDWARE_ERROR &&
2544				sshdr.asc == 0x3e &&
2545				sshdr.ascq == 0x1) {
2546			pqi_take_device_offline(scmd->device, "RAID");
2547			host_byte = DID_NO_CONNECT;
2548		}
2549
2550		if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2551			sense_data_length = SCSI_SENSE_BUFFERSIZE;
2552		memcpy(scmd->sense_buffer, error_info->data,
2553			sense_data_length);
2554	}
2555
2556	scmd->result = scsi_status;
2557	set_host_byte(scmd, host_byte);
2558}
2559
2560static void pqi_process_aio_io_error(struct pqi_io_request *io_request)
2561{
2562	u8 scsi_status;
2563	u8 host_byte;
2564	struct scsi_cmnd *scmd;
2565	struct pqi_aio_error_info *error_info;
2566	size_t sense_data_length;
2567	int residual_count;
2568	int xfer_count;
2569	bool device_offline;
2570
2571	scmd = io_request->scmd;
2572	error_info = io_request->error_info;
2573	host_byte = DID_OK;
2574	sense_data_length = 0;
2575	device_offline = false;
2576
2577	switch (error_info->service_response) {
2578	case PQI_AIO_SERV_RESPONSE_COMPLETE:
2579		scsi_status = error_info->status;
2580		break;
2581	case PQI_AIO_SERV_RESPONSE_FAILURE:
2582		switch (error_info->status) {
2583		case PQI_AIO_STATUS_IO_ABORTED:
2584			scsi_status = SAM_STAT_TASK_ABORTED;
2585			break;
2586		case PQI_AIO_STATUS_UNDERRUN:
2587			scsi_status = SAM_STAT_GOOD;
2588			residual_count = get_unaligned_le32(
2589						&error_info->residual_count);
2590			scsi_set_resid(scmd, residual_count);
2591			xfer_count = scsi_bufflen(scmd) - residual_count;
2592			if (xfer_count < scmd->underflow)
2593				host_byte = DID_SOFT_ERROR;
2594			break;
2595		case PQI_AIO_STATUS_OVERRUN:
2596			scsi_status = SAM_STAT_GOOD;
2597			break;
2598		case PQI_AIO_STATUS_AIO_PATH_DISABLED:
2599			pqi_aio_path_disabled(io_request);
2600			scsi_status = SAM_STAT_GOOD;
2601			io_request->status = -EAGAIN;
2602			break;
2603		case PQI_AIO_STATUS_NO_PATH_TO_DEVICE:
2604		case PQI_AIO_STATUS_INVALID_DEVICE:
2605			if (!io_request->raid_bypass) {
2606				device_offline = true;
2607				pqi_take_device_offline(scmd->device, "AIO");
2608				host_byte = DID_NO_CONNECT;
2609			}
2610			scsi_status = SAM_STAT_CHECK_CONDITION;
2611			break;
2612		case PQI_AIO_STATUS_IO_ERROR:
2613		default:
2614			scsi_status = SAM_STAT_CHECK_CONDITION;
2615			break;
2616		}
2617		break;
2618	case PQI_AIO_SERV_RESPONSE_TMF_COMPLETE:
2619	case PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED:
2620		scsi_status = SAM_STAT_GOOD;
2621		break;
2622	case PQI_AIO_SERV_RESPONSE_TMF_REJECTED:
2623	case PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN:
2624	default:
2625		scsi_status = SAM_STAT_CHECK_CONDITION;
2626		break;
2627	}
2628
2629	if (error_info->data_present) {
2630		sense_data_length =
2631			get_unaligned_le16(&error_info->data_length);
2632		if (sense_data_length) {
2633			if (sense_data_length > sizeof(error_info->data))
2634				sense_data_length = sizeof(error_info->data);
2635			if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2636				sense_data_length = SCSI_SENSE_BUFFERSIZE;
2637			memcpy(scmd->sense_buffer, error_info->data,
2638				sense_data_length);
2639		}
2640	}
2641
2642	if (device_offline && sense_data_length == 0)
2643		scsi_build_sense_buffer(0, scmd->sense_buffer, HARDWARE_ERROR,
2644			0x3e, 0x1);
2645
2646	scmd->result = scsi_status;
2647	set_host_byte(scmd, host_byte);
2648}
2649
2650static void pqi_process_io_error(unsigned int iu_type,
2651	struct pqi_io_request *io_request)
2652{
2653	switch (iu_type) {
2654	case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2655		pqi_process_raid_io_error(io_request);
2656		break;
2657	case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2658		pqi_process_aio_io_error(io_request);
2659		break;
2660	}
2661}
2662
2663static int pqi_interpret_task_management_response(
2664	struct pqi_task_management_response *response)
2665{
2666	int rc;
2667
2668	switch (response->response_code) {
2669	case SOP_TMF_COMPLETE:
2670	case SOP_TMF_FUNCTION_SUCCEEDED:
2671		rc = 0;
2672		break;
2673	default:
2674		rc = -EIO;
2675		break;
2676	}
2677
2678	return rc;
2679}
2680
2681static unsigned int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info,
2682	struct pqi_queue_group *queue_group)
2683{
2684	unsigned int num_responses;
2685	pqi_index_t oq_pi;
2686	pqi_index_t oq_ci;
2687	struct pqi_io_request *io_request;
2688	struct pqi_io_response *response;
2689	u16 request_id;
2690
2691	num_responses = 0;
2692	oq_ci = queue_group->oq_ci_copy;
2693
2694	while (1) {
2695		oq_pi = *queue_group->oq_pi;
2696		if (oq_pi == oq_ci)
2697			break;
2698
2699		num_responses++;
2700		response = queue_group->oq_element_array +
2701			(oq_ci * PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
2702
2703		request_id = get_unaligned_le16(&response->request_id);
2704		WARN_ON(request_id >= ctrl_info->max_io_slots);
2705
2706		io_request = &ctrl_info->io_request_pool[request_id];
2707		WARN_ON(atomic_read(&io_request->refcount) == 0);
2708
2709		switch (response->header.iu_type) {
2710		case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
2711		case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
2712		case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
2713			break;
2714		case PQI_RESPONSE_IU_TASK_MANAGEMENT:
2715			io_request->status =
2716				pqi_interpret_task_management_response(
2717					(void *)response);
2718			break;
2719		case PQI_RESPONSE_IU_AIO_PATH_DISABLED:
2720			pqi_aio_path_disabled(io_request);
2721			io_request->status = -EAGAIN;
2722			break;
2723		case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2724		case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2725			io_request->error_info = ctrl_info->error_buffer +
2726				(get_unaligned_le16(&response->error_index) *
2727				PQI_ERROR_BUFFER_ELEMENT_LENGTH);
2728			pqi_process_io_error(response->header.iu_type,
2729				io_request);
2730			break;
2731		default:
2732			dev_err(&ctrl_info->pci_dev->dev,
2733				"unexpected IU type: 0x%x\n",
2734				response->header.iu_type);
2735			break;
2736		}
2737
2738		io_request->io_complete_callback(io_request,
2739			io_request->context);
2740
2741		/*
2742		 * Note that the I/O request structure CANNOT BE TOUCHED after
2743		 * returning from the I/O completion callback!
2744		 */
2745
2746		oq_ci = (oq_ci + 1) % ctrl_info->num_elements_per_oq;
2747	}
2748
2749	if (num_responses) {
2750		queue_group->oq_ci_copy = oq_ci;
2751		writel(oq_ci, queue_group->oq_ci);
2752	}
2753
2754	return num_responses;
2755}
2756
2757static inline unsigned int pqi_num_elements_free(unsigned int pi,
2758	unsigned int ci, unsigned int elements_in_queue)
2759{
2760	unsigned int num_elements_used;
2761
2762	if (pi >= ci)
2763		num_elements_used = pi - ci;
2764	else
2765		num_elements_used = elements_in_queue - ci + pi;
2766
2767	return elements_in_queue - num_elements_used - 1;
2768}
2769
2770static void pqi_send_event_ack(struct pqi_ctrl_info *ctrl_info,
2771	struct pqi_event_acknowledge_request *iu, size_t iu_length)
2772{
2773	pqi_index_t iq_pi;
2774	pqi_index_t iq_ci;
2775	unsigned long flags;
2776	void *next_element;
2777	struct pqi_queue_group *queue_group;
2778
2779	queue_group = &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP];
2780	put_unaligned_le16(queue_group->oq_id, &iu->header.response_queue_id);
2781
2782	while (1) {
2783		spin_lock_irqsave(&queue_group->submit_lock[RAID_PATH], flags);
2784
2785		iq_pi = queue_group->iq_pi_copy[RAID_PATH];
2786		iq_ci = *queue_group->iq_ci[RAID_PATH];
2787
2788		if (pqi_num_elements_free(iq_pi, iq_ci,
2789			ctrl_info->num_elements_per_iq))
2790			break;
2791
2792		spin_unlock_irqrestore(
2793			&queue_group->submit_lock[RAID_PATH], flags);
2794
2795		if (pqi_ctrl_offline(ctrl_info))
2796			return;
2797	}
2798
2799	next_element = queue_group->iq_element_array[RAID_PATH] +
2800		(iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
2801
2802	memcpy(next_element, iu, iu_length);
2803
2804	iq_pi = (iq_pi + 1) % ctrl_info->num_elements_per_iq;
2805	queue_group->iq_pi_copy[RAID_PATH] = iq_pi;
2806
2807	/*
2808	 * This write notifies the controller that an IU is available to be
2809	 * processed.
2810	 */
2811	writel(iq_pi, queue_group->iq_pi[RAID_PATH]);
2812
2813	spin_unlock_irqrestore(&queue_group->submit_lock[RAID_PATH], flags);
2814}
2815
2816static void pqi_acknowledge_event(struct pqi_ctrl_info *ctrl_info,
2817	struct pqi_event *event)
2818{
2819	struct pqi_event_acknowledge_request request;
2820
2821	memset(&request, 0, sizeof(request));
2822
2823	request.header.iu_type = PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT;
2824	put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
2825		&request.header.iu_length);
2826	request.event_type = event->event_type;
2827	request.event_id = event->event_id;
2828	request.additional_event_id = event->additional_event_id;
2829
2830	pqi_send_event_ack(ctrl_info, &request, sizeof(request));
2831}
2832
2833static void pqi_event_worker(struct work_struct *work)
2834{
2835	unsigned int i;
2836	struct pqi_ctrl_info *ctrl_info;
2837	struct pqi_event *event;
2838
2839	ctrl_info = container_of(work, struct pqi_ctrl_info, event_work);
2840
2841	pqi_ctrl_busy(ctrl_info);
2842	pqi_wait_if_ctrl_blocked(ctrl_info, NO_TIMEOUT);
2843	if (pqi_ctrl_offline(ctrl_info))
2844		goto out;
2845
2846	pqi_schedule_rescan_worker_delayed(ctrl_info);
2847
2848	event = ctrl_info->events;
2849	for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
2850		if (event->pending) {
2851			event->pending = false;
2852			pqi_acknowledge_event(ctrl_info, event);
2853		}
2854		event++;
2855	}
2856
2857out:
2858	pqi_ctrl_unbusy(ctrl_info);
2859}
2860
2861#define PQI_HEARTBEAT_TIMER_INTERVAL	(10 * HZ)
2862
2863static void pqi_heartbeat_timer_handler(struct timer_list *t)
2864{
2865	int num_interrupts;
2866	u32 heartbeat_count;
2867	struct pqi_ctrl_info *ctrl_info = from_timer(ctrl_info, t,
2868						     heartbeat_timer);
2869
2870	pqi_check_ctrl_health(ctrl_info);
2871	if (pqi_ctrl_offline(ctrl_info))
2872		return;
2873
2874	num_interrupts = atomic_read(&ctrl_info->num_interrupts);
2875	heartbeat_count = pqi_read_heartbeat_counter(ctrl_info);
2876
2877	if (num_interrupts == ctrl_info->previous_num_interrupts) {
2878		if (heartbeat_count == ctrl_info->previous_heartbeat_count) {
2879			dev_err(&ctrl_info->pci_dev->dev,
2880				"no heartbeat detected - last heartbeat count: %u\n",
2881				heartbeat_count);
2882			pqi_take_ctrl_offline(ctrl_info);
2883			return;
2884		}
2885	} else {
2886		ctrl_info->previous_num_interrupts = num_interrupts;
2887	}
2888
2889	ctrl_info->previous_heartbeat_count = heartbeat_count;
2890	mod_timer(&ctrl_info->heartbeat_timer,
2891		jiffies + PQI_HEARTBEAT_TIMER_INTERVAL);
2892}
2893
2894static void pqi_start_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
2895{
2896	if (!ctrl_info->heartbeat_counter)
2897		return;
2898
2899	ctrl_info->previous_num_interrupts =
2900		atomic_read(&ctrl_info->num_interrupts);
2901	ctrl_info->previous_heartbeat_count =
2902		pqi_read_heartbeat_counter(ctrl_info);
2903
2904	ctrl_info->heartbeat_timer.expires =
2905		jiffies + PQI_HEARTBEAT_TIMER_INTERVAL;
2906	add_timer(&ctrl_info->heartbeat_timer);
2907}
2908
2909static inline void pqi_stop_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
2910{
2911	del_timer_sync(&ctrl_info->heartbeat_timer);
2912}
2913
2914static inline int pqi_event_type_to_event_index(unsigned int event_type)
2915{
2916	int index;
2917
2918	for (index = 0; index < ARRAY_SIZE(pqi_supported_event_types); index++)
2919		if (event_type == pqi_supported_event_types[index])
2920			return index;
2921
2922	return -1;
2923}
2924
2925static inline bool pqi_is_supported_event(unsigned int event_type)
2926{
2927	return pqi_event_type_to_event_index(event_type) != -1;
2928}
2929
2930static unsigned int pqi_process_event_intr(struct pqi_ctrl_info *ctrl_info)
2931{
2932	unsigned int num_events;
2933	pqi_index_t oq_pi;
2934	pqi_index_t oq_ci;
2935	struct pqi_event_queue *event_queue;
2936	struct pqi_event_response *response;
2937	struct pqi_event *event;
2938	int event_index;
2939
2940	event_queue = &ctrl_info->event_queue;
2941	num_events = 0;
2942	oq_ci = event_queue->oq_ci_copy;
2943
2944	while (1) {
2945		oq_pi = *event_queue->oq_pi;
2946		if (oq_pi == oq_ci)
2947			break;
2948
2949		num_events++;
2950		response = event_queue->oq_element_array +
2951			(oq_ci * PQI_EVENT_OQ_ELEMENT_LENGTH);
2952
2953		event_index =
2954			pqi_event_type_to_event_index(response->event_type);
2955
2956		if (event_index >= 0) {
2957			if (response->request_acknowlege) {
2958				event = &ctrl_info->events[event_index];
2959				event->pending = true;
2960				event->event_type = response->event_type;
2961				event->event_id = response->event_id;
2962				event->additional_event_id =
2963					response->additional_event_id;
2964			}
2965		}
2966
2967		oq_ci = (oq_ci + 1) % PQI_NUM_EVENT_QUEUE_ELEMENTS;
2968	}
2969
2970	if (num_events) {
2971		event_queue->oq_ci_copy = oq_ci;
2972		writel(oq_ci, event_queue->oq_ci);
2973		schedule_work(&ctrl_info->event_work);
2974	}
2975
2976	return num_events;
2977}
2978
2979#define PQI_LEGACY_INTX_MASK	0x1
2980
2981static inline void pqi_configure_legacy_intx(struct pqi_ctrl_info *ctrl_info,
2982						bool enable_intx)
2983{
2984	u32 intx_mask;
2985	struct pqi_device_registers __iomem *pqi_registers;
2986	volatile void __iomem *register_addr;
2987
2988	pqi_registers = ctrl_info->pqi_registers;
2989
2990	if (enable_intx)
2991		register_addr = &pqi_registers->legacy_intx_mask_clear;
2992	else
2993		register_addr = &pqi_registers->legacy_intx_mask_set;
2994
2995	intx_mask = readl(register_addr);
2996	intx_mask |= PQI_LEGACY_INTX_MASK;
2997	writel(intx_mask, register_addr);
2998}
2999
3000static void pqi_change_irq_mode(struct pqi_ctrl_info *ctrl_info,
3001	enum pqi_irq_mode new_mode)
3002{
3003	switch (ctrl_info->irq_mode) {
3004	case IRQ_MODE_MSIX:
3005		switch (new_mode) {
3006		case IRQ_MODE_MSIX:
3007			break;
3008		case IRQ_MODE_INTX:
3009			pqi_configure_legacy_intx(ctrl_info, true);
3010			sis_enable_intx(ctrl_info);
3011			break;
3012		case IRQ_MODE_NONE:
3013			break;
3014		}
3015		break;
3016	case IRQ_MODE_INTX:
3017		switch (new_mode) {
3018		case IRQ_MODE_MSIX:
3019			pqi_configure_legacy_intx(ctrl_info, false);
3020			sis_enable_msix(ctrl_info);
3021			break;
3022		case IRQ_MODE_INTX:
3023			break;
3024		case IRQ_MODE_NONE:
3025			pqi_configure_legacy_intx(ctrl_info, false);
3026			break;
3027		}
3028		break;
3029	case IRQ_MODE_NONE:
3030		switch (new_mode) {
3031		case IRQ_MODE_MSIX:
3032			sis_enable_msix(ctrl_info);
3033			break;
3034		case IRQ_MODE_INTX:
3035			pqi_configure_legacy_intx(ctrl_info, true);
3036			sis_enable_intx(ctrl_info);
3037			break;
3038		case IRQ_MODE_NONE:
3039			break;
3040		}
3041		break;
3042	}
3043
3044	ctrl_info->irq_mode = new_mode;
3045}
3046
3047#define PQI_LEGACY_INTX_PENDING		0x1
3048
3049static inline bool pqi_is_valid_irq(struct pqi_ctrl_info *ctrl_info)
3050{
3051	bool valid_irq;
3052	u32 intx_status;
3053
3054	switch (ctrl_info->irq_mode) {
3055	case IRQ_MODE_MSIX:
3056		valid_irq = true;
3057		break;
3058	case IRQ_MODE_INTX:
3059		intx_status =
3060			readl(&ctrl_info->pqi_registers->legacy_intx_status);
3061		if (intx_status & PQI_LEGACY_INTX_PENDING)
3062			valid_irq = true;
3063		else
3064			valid_irq = false;
3065		break;
3066	case IRQ_MODE_NONE:
3067	default:
3068		valid_irq = false;
3069		break;
3070	}
3071
3072	return valid_irq;
3073}
3074
3075static irqreturn_t pqi_irq_handler(int irq, void *data)
3076{
3077	struct pqi_ctrl_info *ctrl_info;
3078	struct pqi_queue_group *queue_group;
3079	unsigned int num_responses_handled;
3080
3081	queue_group = data;
3082	ctrl_info = queue_group->ctrl_info;
3083
3084	if (!pqi_is_valid_irq(ctrl_info))
3085		return IRQ_NONE;
3086
3087	num_responses_handled = pqi_process_io_intr(ctrl_info, queue_group);
3088
3089	if (irq == ctrl_info->event_irq)
3090		num_responses_handled += pqi_process_event_intr(ctrl_info);
3091
3092	if (num_responses_handled)
3093		atomic_inc(&ctrl_info->num_interrupts);
3094
3095	pqi_start_io(ctrl_info, queue_group, RAID_PATH, NULL);
3096	pqi_start_io(ctrl_info, queue_group, AIO_PATH, NULL);
3097
3098	return IRQ_HANDLED;
3099}
3100
3101static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
3102{
3103	struct pci_dev *pci_dev = ctrl_info->pci_dev;
3104	int i;
3105	int rc;
3106
3107	ctrl_info->event_irq = pci_irq_vector(pci_dev, 0);
3108
3109	for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) {
3110		rc = request_irq(pci_irq_vector(pci_dev, i), pqi_irq_handler, 0,
3111			DRIVER_NAME_SHORT, &ctrl_info->queue_groups[i]);
3112		if (rc) {
3113			dev_err(&pci_dev->dev,
3114				"irq %u init failed with error %d\n",
3115				pci_irq_vector(pci_dev, i), rc);
3116			return rc;
3117		}
3118		ctrl_info->num_msix_vectors_initialized++;
3119	}
3120
3121	return 0;
3122}
3123
3124static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info)
3125{
3126	int i;
3127
3128	for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
3129		free_irq(pci_irq_vector(ctrl_info->pci_dev, i),
3130			&ctrl_info->queue_groups[i]);
3131
3132	ctrl_info->num_msix_vectors_initialized = 0;
3133}
3134
3135static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3136{
3137	int num_vectors_enabled;
3138
3139	num_vectors_enabled = pci_alloc_irq_vectors(ctrl_info->pci_dev,
3140			PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups,
3141			PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
3142	if (num_vectors_enabled < 0) {
3143		dev_err(&ctrl_info->pci_dev->dev,
3144			"MSI-X init failed with error %d\n",
3145			num_vectors_enabled);
3146		return num_vectors_enabled;
3147	}
3148
3149	ctrl_info->num_msix_vectors_enabled = num_vectors_enabled;
3150	ctrl_info->irq_mode = IRQ_MODE_MSIX;
3151	return 0;
3152}
3153
3154static void pqi_disable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3155{
3156	if (ctrl_info->num_msix_vectors_enabled) {
3157		pci_free_irq_vectors(ctrl_info->pci_dev);
3158		ctrl_info->num_msix_vectors_enabled = 0;
3159	}
3160}
3161
3162static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info)
3163{
3164	unsigned int i;
3165	size_t alloc_length;
3166	size_t element_array_length_per_iq;
3167	size_t element_array_length_per_oq;
3168	void *element_array;
3169	void *next_queue_index;
3170	void *aligned_pointer;
3171	unsigned int num_inbound_queues;
3172	unsigned int num_outbound_queues;
3173	unsigned int num_queue_indexes;
3174	struct pqi_queue_group *queue_group;
3175
3176	element_array_length_per_iq =
3177		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH *
3178		ctrl_info->num_elements_per_iq;
3179	element_array_length_per_oq =
3180		PQI_OPERATIONAL_OQ_ELEMENT_LENGTH *
3181		ctrl_info->num_elements_per_oq;
3182	num_inbound_queues = ctrl_info->num_queue_groups * 2;
3183	num_outbound_queues = ctrl_info->num_queue_groups;
3184	num_queue_indexes = (ctrl_info->num_queue_groups * 3) + 1;
3185
3186	aligned_pointer = NULL;
3187
3188	for (i = 0; i < num_inbound_queues; i++) {
3189		aligned_pointer = PTR_ALIGN(aligned_pointer,
3190			PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3191		aligned_pointer += element_array_length_per_iq;
3192	}
3193
3194	for (i = 0; i < num_outbound_queues; i++) {
3195		aligned_pointer = PTR_ALIGN(aligned_pointer,
3196			PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3197		aligned_pointer += element_array_length_per_oq;
3198	}
3199
3200	aligned_pointer = PTR_ALIGN(aligned_pointer,
3201		PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3202	aligned_pointer += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3203		PQI_EVENT_OQ_ELEMENT_LENGTH;
3204
3205	for (i = 0; i < num_queue_indexes; i++) {
3206		aligned_pointer = PTR_ALIGN(aligned_pointer,
3207			PQI_OPERATIONAL_INDEX_ALIGNMENT);
3208		aligned_pointer += sizeof(pqi_index_t);
3209	}
3210
3211	alloc_length = (size_t)aligned_pointer +
3212		PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3213
3214	alloc_length += PQI_EXTRA_SGL_MEMORY;
3215
3216	ctrl_info->queue_memory_base =
3217		dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
3218			alloc_length,
3219			&ctrl_info->queue_memory_base_dma_handle, GFP_KERNEL);
3220
3221	if (!ctrl_info->queue_memory_base)
3222		return -ENOMEM;
3223
3224	ctrl_info->queue_memory_length = alloc_length;
3225
3226	element_array = PTR_ALIGN(ctrl_info->queue_memory_base,
3227		PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3228
3229	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3230		queue_group = &ctrl_info->queue_groups[i];
3231		queue_group->iq_element_array[RAID_PATH] = element_array;
3232		queue_group->iq_element_array_bus_addr[RAID_PATH] =
3233			ctrl_info->queue_memory_base_dma_handle +
3234				(element_array - ctrl_info->queue_memory_base);
3235		element_array += element_array_length_per_iq;
3236		element_array = PTR_ALIGN(element_array,
3237			PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3238		queue_group->iq_element_array[AIO_PATH] = element_array;
3239		queue_group->iq_element_array_bus_addr[AIO_PATH] =
3240			ctrl_info->queue_memory_base_dma_handle +
3241			(element_array - ctrl_info->queue_memory_base);
3242		element_array += element_array_length_per_iq;
3243		element_array = PTR_ALIGN(element_array,
3244			PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3245	}
3246
3247	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3248		queue_group = &ctrl_info->queue_groups[i];
3249		queue_group->oq_element_array = element_array;
3250		queue_group->oq_element_array_bus_addr =
3251			ctrl_info->queue_memory_base_dma_handle +
3252			(element_array - ctrl_info->queue_memory_base);
3253		element_array += element_array_length_per_oq;
3254		element_array = PTR_ALIGN(element_array,
3255			PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3256	}
3257
3258	ctrl_info->event_queue.oq_element_array = element_array;
3259	ctrl_info->event_queue.oq_element_array_bus_addr =
3260		ctrl_info->queue_memory_base_dma_handle +
3261		(element_array - ctrl_info->queue_memory_base);
3262	element_array += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3263		PQI_EVENT_OQ_ELEMENT_LENGTH;
3264
3265	next_queue_index = PTR_ALIGN(element_array,
3266		PQI_OPERATIONAL_INDEX_ALIGNMENT);
3267
3268	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3269		queue_group = &ctrl_info->queue_groups[i];
3270		queue_group->iq_ci[RAID_PATH] = next_queue_index;
3271		queue_group->iq_ci_bus_addr[RAID_PATH] =
3272			ctrl_info->queue_memory_base_dma_handle +
3273			(next_queue_index - ctrl_info->queue_memory_base);
3274		next_queue_index += sizeof(pqi_index_t);
3275		next_queue_index = PTR_ALIGN(next_queue_index,
3276			PQI_OPERATIONAL_INDEX_ALIGNMENT);
3277		queue_group->iq_ci[AIO_PATH] = next_queue_index;
3278		queue_group->iq_ci_bus_addr[AIO_PATH] =
3279			ctrl_info->queue_memory_base_dma_handle +
3280			(next_queue_index - ctrl_info->queue_memory_base);
3281		next_queue_index += sizeof(pqi_index_t);
3282		next_queue_index = PTR_ALIGN(next_queue_index,
3283			PQI_OPERATIONAL_INDEX_ALIGNMENT);
3284		queue_group->oq_pi = next_queue_index;
3285		queue_group->oq_pi_bus_addr =
3286			ctrl_info->queue_memory_base_dma_handle +
3287			(next_queue_index - ctrl_info->queue_memory_base);
3288		next_queue_index += sizeof(pqi_index_t);
3289		next_queue_index = PTR_ALIGN(next_queue_index,
3290			PQI_OPERATIONAL_INDEX_ALIGNMENT);
3291	}
3292
3293	ctrl_info->event_queue.oq_pi = next_queue_index;
3294	ctrl_info->event_queue.oq_pi_bus_addr =
3295		ctrl_info->queue_memory_base_dma_handle +
3296		(next_queue_index - ctrl_info->queue_memory_base);
3297
3298	return 0;
3299}
3300
3301static void pqi_init_operational_queues(struct pqi_ctrl_info *ctrl_info)
3302{
3303	unsigned int i;
3304	u16 next_iq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3305	u16 next_oq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3306
3307	/*
3308	 * Initialize the backpointers to the controller structure in
3309	 * each operational queue group structure.
3310	 */
3311	for (i = 0; i < ctrl_info->num_queue_groups; i++)
3312		ctrl_info->queue_groups[i].ctrl_info = ctrl_info;
3313
3314	/*
3315	 * Assign IDs to all operational queues.  Note that the IDs
3316	 * assigned to operational IQs are independent of the IDs
3317	 * assigned to operational OQs.
3318	 */
3319	ctrl_info->event_queue.oq_id = next_oq_id++;
3320	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3321		ctrl_info->queue_groups[i].iq_id[RAID_PATH] = next_iq_id++;
3322		ctrl_info->queue_groups[i].iq_id[AIO_PATH] = next_iq_id++;
3323		ctrl_info->queue_groups[i].oq_id = next_oq_id++;
3324	}
3325
3326	/*
3327	 * Assign MSI-X table entry indexes to all queues.  Note that the
3328	 * interrupt for the event queue is shared with the first queue group.
3329	 */
3330	ctrl_info->event_queue.int_msg_num = 0;
3331	for (i = 0; i < ctrl_info->num_queue_groups; i++)
3332		ctrl_info->queue_groups[i].int_msg_num = i;
3333
3334	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3335		spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[0]);
3336		spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[1]);
3337		INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[0]);
3338		INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[1]);
3339	}
3340}
3341
3342static int pqi_alloc_admin_queues(struct pqi_ctrl_info *ctrl_info)
3343{
3344	size_t alloc_length;
3345	struct pqi_admin_queues_aligned *admin_queues_aligned;
3346	struct pqi_admin_queues *admin_queues;
3347
3348	alloc_length = sizeof(struct pqi_admin_queues_aligned) +
3349		PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3350
3351	ctrl_info->admin_queue_memory_base =
3352		dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
3353			alloc_length,
3354			&ctrl_info->admin_queue_memory_base_dma_handle,
3355			GFP_KERNEL);
3356
3357	if (!ctrl_info->admin_queue_memory_base)
3358		return -ENOMEM;
3359
3360	ctrl_info->admin_queue_memory_length = alloc_length;
3361
3362	admin_queues = &ctrl_info->admin_queues;
3363	admin_queues_aligned = PTR_ALIGN(ctrl_info->admin_queue_memory_base,
3364		PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3365	admin_queues->iq_element_array =
3366		&admin_queues_aligned->iq_element_array;
3367	admin_queues->oq_element_array =
3368		&admin_queues_aligned->oq_element_array;
3369	admin_queues->iq_ci = &admin_queues_aligned->iq_ci;
3370	admin_queues->oq_pi = &admin_queues_aligned->oq_pi;
3371
3372	admin_queues->iq_element_array_bus_addr =
3373		ctrl_info->admin_queue_memory_base_dma_handle +
3374		(admin_queues->iq_element_array -
3375		ctrl_info->admin_queue_memory_base);
3376	admin_queues->oq_element_array_bus_addr =
3377		ctrl_info->admin_queue_memory_base_dma_handle +
3378		(admin_queues->oq_element_array -
3379		ctrl_info->admin_queue_memory_base);
3380	admin_queues->iq_ci_bus_addr =
3381		ctrl_info->admin_queue_memory_base_dma_handle +
3382		((void *)admin_queues->iq_ci -
3383		ctrl_info->admin_queue_memory_base);
3384	admin_queues->oq_pi_bus_addr =
3385		ctrl_info->admin_queue_memory_base_dma_handle +
3386		((void *)admin_queues->oq_pi -
3387		ctrl_info->admin_queue_memory_base);
3388
3389	return 0;
3390}
3391
3392#define PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES		HZ
3393#define PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS	1
3394
3395static int pqi_create_admin_queues(struct pqi_ctrl_info *ctrl_info)
3396{
3397	struct pqi_device_registers __iomem *pqi_registers;
3398	struct pqi_admin_queues *admin_queues;
3399	unsigned long timeout;
3400	u8 status;
3401	u32 reg;
3402
3403	pqi_registers = ctrl_info->pqi_registers;
3404	admin_queues = &ctrl_info->admin_queues;
3405
3406	writeq((u64)admin_queues->iq_element_array_bus_addr,
3407		&pqi_registers->admin_iq_element_array_addr);
3408	writeq((u64)admin_queues->oq_element_array_bus_addr,
3409		&pqi_registers->admin_oq_element_array_addr);
3410	writeq((u64)admin_queues->iq_ci_bus_addr,
3411		&pqi_registers->admin_iq_ci_addr);
3412	writeq((u64)admin_queues->oq_pi_bus_addr,
3413		&pqi_registers->admin_oq_pi_addr);
3414
3415	reg = PQI_ADMIN_IQ_NUM_ELEMENTS |
3416		(PQI_ADMIN_OQ_NUM_ELEMENTS) << 8 |
3417		(admin_queues->int_msg_num << 16);
3418	writel(reg, &pqi_registers->admin_iq_num_elements);
3419	writel(PQI_CREATE_ADMIN_QUEUE_PAIR,
3420		&pqi_registers->function_and_status_code);
3421
3422	timeout = PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES + jiffies;
3423	while (1) {
3424		status = readb(&pqi_registers->function_and_status_code);
3425		if (status == PQI_STATUS_IDLE)
3426			break;
3427		if (time_after(jiffies, timeout))
3428			return -ETIMEDOUT;
3429		msleep(PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS);
3430	}
3431
3432	/*
3433	 * The offset registers are not initialized to the correct
3434	 * offsets until *after* the create admin queue pair command
3435	 * completes successfully.
3436	 */
3437	admin_queues->iq_pi = ctrl_info->iomem_base +
3438		PQI_DEVICE_REGISTERS_OFFSET +
3439		readq(&pqi_registers->admin_iq_pi_offset);
3440	admin_queues->oq_ci = ctrl_info->iomem_base +
3441		PQI_DEVICE_REGISTERS_OFFSET +
3442		readq(&pqi_registers->admin_oq_ci_offset);
3443
3444	return 0;
3445}
3446
3447static void pqi_submit_admin_request(struct pqi_ctrl_info *ctrl_info,
3448	struct pqi_general_admin_request *request)
3449{
3450	struct pqi_admin_queues *admin_queues;
3451	void *next_element;
3452	pqi_index_t iq_pi;
3453
3454	admin_queues = &ctrl_info->admin_queues;
3455	iq_pi = admin_queues->iq_pi_copy;
3456
3457	next_element = admin_queues->iq_element_array +
3458		(iq_pi * PQI_ADMIN_IQ_ELEMENT_LENGTH);
3459
3460	memcpy(next_element, request, sizeof(*request));
3461
3462	iq_pi = (iq_pi + 1) % PQI_ADMIN_IQ_NUM_ELEMENTS;
3463	admin_queues->iq_pi_copy = iq_pi;
3464
3465	/*
3466	 * This write notifies the controller that an IU is available to be
3467	 * processed.
3468	 */
3469	writel(iq_pi, admin_queues->iq_pi);
3470}
3471
3472#define PQI_ADMIN_REQUEST_TIMEOUT_SECS	60
3473
3474static int pqi_poll_for_admin_response(struct pqi_ctrl_info *ctrl_info,
3475	struct pqi_general_admin_response *response)
3476{
3477	struct pqi_admin_queues *admin_queues;
3478	pqi_index_t oq_pi;
3479	pqi_index_t oq_ci;
3480	unsigned long timeout;
3481
3482	admin_queues = &ctrl_info->admin_queues;
3483	oq_ci = admin_queues->oq_ci_copy;
3484
3485	timeout = (PQI_ADMIN_REQUEST_TIMEOUT_SECS * HZ) + jiffies;
3486
3487	while (1) {
3488		oq_pi = *admin_queues->oq_pi;
3489		if (oq_pi != oq_ci)
3490			break;
3491		if (time_after(jiffies, timeout)) {
3492			dev_err(&ctrl_info->pci_dev->dev,
3493				"timed out waiting for admin response\n");
3494			return -ETIMEDOUT;
3495		}
3496		if (!sis_is_firmware_running(ctrl_info))
3497			return -ENXIO;
3498		usleep_range(1000, 2000);
3499	}
3500
3501	memcpy(response, admin_queues->oq_element_array +
3502		(oq_ci * PQI_ADMIN_OQ_ELEMENT_LENGTH), sizeof(*response));
3503
3504	oq_ci = (oq_ci + 1) % PQI_ADMIN_OQ_NUM_ELEMENTS;
3505	admin_queues->oq_ci_copy = oq_ci;
3506	writel(oq_ci, admin_queues->oq_ci);
3507
3508	return 0;
3509}
3510
3511static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
3512	struct pqi_queue_group *queue_group, enum pqi_io_path path,
3513	struct pqi_io_request *io_request)
3514{
3515	struct pqi_io_request *next;
3516	void *next_element;
3517	pqi_index_t iq_pi;
3518	pqi_index_t iq_ci;
3519	size_t iu_length;
3520	unsigned long flags;
3521	unsigned int num_elements_needed;
3522	unsigned int num_elements_to_end_of_queue;
3523	size_t copy_count;
3524	struct pqi_iu_header *request;
3525
3526	spin_lock_irqsave(&queue_group->submit_lock[path], flags);
3527
3528	if (io_request) {
3529		io_request->queue_group = queue_group;
3530		list_add_tail(&io_request->request_list_entry,
3531			&queue_group->request_list[path]);
3532	}
3533
3534	iq_pi = queue_group->iq_pi_copy[path];
3535
3536	list_for_each_entry_safe(io_request, next,
3537		&queue_group->request_list[path], request_list_entry) {
3538
3539		request = io_request->iu;
3540
3541		iu_length = get_unaligned_le16(&request->iu_length) +
3542			PQI_REQUEST_HEADER_LENGTH;
3543		num_elements_needed =
3544			DIV_ROUND_UP(iu_length,
3545				PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3546
3547		iq_ci = *queue_group->iq_ci[path];
3548
3549		if (num_elements_needed > pqi_num_elements_free(iq_pi, iq_ci,
3550			ctrl_info->num_elements_per_iq))
3551			break;
3552
3553		put_unaligned_le16(queue_group->oq_id,
3554			&request->response_queue_id);
3555
3556		next_element = queue_group->iq_element_array[path] +
3557			(iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3558
3559		num_elements_to_end_of_queue =
3560			ctrl_info->num_elements_per_iq - iq_pi;
3561
3562		if (num_elements_needed <= num_elements_to_end_of_queue) {
3563			memcpy(next_element, request, iu_length);
3564		} else {
3565			copy_count = num_elements_to_end_of_queue *
3566				PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
3567			memcpy(next_element, request, copy_count);
3568			memcpy(queue_group->iq_element_array[path],
3569				(u8 *)request + copy_count,
3570				iu_length - copy_count);
3571		}
3572
3573		iq_pi = (iq_pi + num_elements_needed) %
3574			ctrl_info->num_elements_per_iq;
3575
3576		list_del(&io_request->request_list_entry);
3577	}
3578
3579	if (iq_pi != queue_group->iq_pi_copy[path]) {
3580		queue_group->iq_pi_copy[path] = iq_pi;
3581		/*
3582		 * This write notifies the controller that one or more IUs are
3583		 * available to be processed.
3584		 */
3585		writel(iq_pi, queue_group->iq_pi[path]);
3586	}
3587
3588	spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
3589}
3590
3591#define PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS		10
3592
3593static int pqi_wait_for_completion_io(struct pqi_ctrl_info *ctrl_info,
3594	struct completion *wait)
3595{
3596	int rc;
3597
3598	while (1) {
3599		if (wait_for_completion_io_timeout(wait,
3600			PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS * HZ)) {
3601			rc = 0;
3602			break;
3603		}
3604
3605		pqi_check_ctrl_health(ctrl_info);
3606		if (pqi_ctrl_offline(ctrl_info)) {
3607			rc = -ENXIO;
3608			break;
3609		}
3610	}
3611
3612	return rc;
3613}
3614
3615static void pqi_raid_synchronous_complete(struct pqi_io_request *io_request,
3616	void *context)
3617{
3618	struct completion *waiting = context;
3619
3620	complete(waiting);
3621}
3622
3623static int pqi_submit_raid_request_synchronous_with_io_request(
3624	struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
3625	unsigned long timeout_msecs)
3626{
3627	int rc = 0;
3628	DECLARE_COMPLETION_ONSTACK(wait);
3629
3630	io_request->io_complete_callback = pqi_raid_synchronous_complete;
3631	io_request->context = &wait;
3632
3633	pqi_start_io(ctrl_info,
3634		&ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
3635		io_request);
3636
3637	if (timeout_msecs == NO_TIMEOUT) {
3638		pqi_wait_for_completion_io(ctrl_info, &wait);
3639	} else {
3640		if (!wait_for_completion_io_timeout(&wait,
3641			msecs_to_jiffies(timeout_msecs))) {
3642			dev_warn(&ctrl_info->pci_dev->dev,
3643				"command timed out\n");
3644			rc = -ETIMEDOUT;
3645		}
3646	}
3647
3648	return rc;
3649}
3650
3651static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
3652	struct pqi_iu_header *request, unsigned int flags,
3653	struct pqi_raid_error_info *error_info, unsigned long timeout_msecs)
3654{
3655	int rc;
3656	struct pqi_io_request *io_request;
3657	unsigned long start_jiffies;
3658	unsigned long msecs_blocked;
3659	size_t iu_length;
3660
3661	/*
3662	 * Note that specifying PQI_SYNC_FLAGS_INTERRUPTABLE and a timeout value
3663	 * are mutually exclusive.
3664	 */
3665
3666	if (flags & PQI_SYNC_FLAGS_INTERRUPTABLE) {
3667		if (down_interruptible(&ctrl_info->sync_request_sem))
3668			return -ERESTARTSYS;
3669	} else {
3670		if (timeout_msecs == NO_TIMEOUT) {
3671			down(&ctrl_info->sync_request_sem);
3672		} else {
3673			start_jiffies = jiffies;
3674			if (down_timeout(&ctrl_info->sync_request_sem,
3675				msecs_to_jiffies(timeout_msecs)))
3676				return -ETIMEDOUT;
3677			msecs_blocked =
3678				jiffies_to_msecs(jiffies - start_jiffies);
3679			if (msecs_blocked >= timeout_msecs)
3680				return -ETIMEDOUT;
3681			timeout_msecs -= msecs_blocked;
3682		}
3683	}
3684
3685	pqi_ctrl_busy(ctrl_info);
3686	timeout_msecs = pqi_wait_if_ctrl_blocked(ctrl_info, timeout_msecs);
3687	if (timeout_msecs == 0) {
3688		rc = -ETIMEDOUT;
3689		goto out;
3690	}
3691
3692	if (pqi_ctrl_offline(ctrl_info)) {
3693		rc = -ENXIO;
3694		goto out;
3695	}
3696
3697	io_request = pqi_alloc_io_request(ctrl_info);
3698
3699	put_unaligned_le16(io_request->index,
3700		&(((struct pqi_raid_path_request *)request)->request_id));
3701
3702	if (request->iu_type == PQI_REQUEST_IU_RAID_PATH_IO)
3703		((struct pqi_raid_path_request *)request)->error_index =
3704			((struct pqi_raid_path_request *)request)->request_id;
3705
3706	iu_length = get_unaligned_le16(&request->iu_length) +
3707		PQI_REQUEST_HEADER_LENGTH;
3708	memcpy(io_request->iu, request, iu_length);
3709
3710	rc = pqi_submit_raid_request_synchronous_with_io_request(ctrl_info,
3711		io_request, timeout_msecs);
3712
3713	if (error_info) {
3714		if (io_request->error_info)
3715			memcpy(error_info, io_request->error_info,
3716				sizeof(*error_info));
3717		else
3718			memset(error_info, 0, sizeof(*error_info));
3719	} else if (rc == 0 && io_request->error_info) {
3720		u8 scsi_status;
3721		struct pqi_raid_error_info *raid_error_info;
3722
3723		raid_error_info = io_request->error_info;
3724		scsi_status = raid_error_info->status;
3725
3726		if (scsi_status == SAM_STAT_CHECK_CONDITION &&
3727			raid_error_info->data_out_result ==
3728			PQI_DATA_IN_OUT_UNDERFLOW)
3729			scsi_status = SAM_STAT_GOOD;
3730
3731		if (scsi_status != SAM_STAT_GOOD)
3732			rc = -EIO;
3733	}
3734
3735	pqi_free_io_request(io_request);
3736
3737out:
3738	pqi_ctrl_unbusy(ctrl_info);
3739	up(&ctrl_info->sync_request_sem);
3740
3741	return rc;
3742}
3743
3744static int pqi_validate_admin_response(
3745	struct pqi_general_admin_response *response, u8 expected_function_code)
3746{
3747	if (response->header.iu_type != PQI_RESPONSE_IU_GENERAL_ADMIN)
3748		return -EINVAL;
3749
3750	if (get_unaligned_le16(&response->header.iu_length) !=
3751		PQI_GENERAL_ADMIN_IU_LENGTH)
3752		return -EINVAL;
3753
3754	if (response->function_code != expected_function_code)
3755		return -EINVAL;
3756
3757	if (response->status != PQI_GENERAL_ADMIN_STATUS_SUCCESS)
3758		return -EINVAL;
3759
3760	return 0;
3761}
3762
3763static int pqi_submit_admin_request_synchronous(
3764	struct pqi_ctrl_info *ctrl_info,
3765	struct pqi_general_admin_request *request,
3766	struct pqi_general_admin_response *response)
3767{
3768	int rc;
3769
3770	pqi_submit_admin_request(ctrl_info, request);
3771
3772	rc = pqi_poll_for_admin_response(ctrl_info, response);
3773
3774	if (rc == 0)
3775		rc = pqi_validate_admin_response(response,
3776			request->function_code);
3777
3778	return rc;
3779}
3780
3781static int pqi_report_device_capability(struct pqi_ctrl_info *ctrl_info)
3782{
3783	int rc;
3784	struct pqi_general_admin_request request;
3785	struct pqi_general_admin_response response;
3786	struct pqi_device_capability *capability;
3787	struct pqi_iu_layer_descriptor *sop_iu_layer_descriptor;
3788
3789	capability = kmalloc(sizeof(*capability), GFP_KERNEL);
3790	if (!capability)
3791		return -ENOMEM;
3792
3793	memset(&request, 0, sizeof(request));
3794
3795	request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3796	put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3797		&request.header.iu_length);
3798	request.function_code =
3799		PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY;
3800	put_unaligned_le32(sizeof(*capability),
3801		&request.data.report_device_capability.buffer_length);
3802
3803	rc = pqi_map_single(ctrl_info->pci_dev,
3804		&request.data.report_device_capability.sg_descriptor,
3805		capability, sizeof(*capability),
3806		PCI_DMA_FROMDEVICE);
3807	if (rc)
3808		goto out;
3809
3810	rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
3811		&response);
3812
3813	pqi_pci_unmap(ctrl_info->pci_dev,
3814		&request.data.report_device_capability.sg_descriptor, 1,
3815		PCI_DMA_FROMDEVICE);
3816
3817	if (rc)
3818		goto out;
3819
3820	if (response.status != PQI_GENERAL_ADMIN_STATUS_SUCCESS) {
3821		rc = -EIO;
3822		goto out;
3823	}
3824
3825	ctrl_info->max_inbound_queues =
3826		get_unaligned_le16(&capability->max_inbound_queues);
3827	ctrl_info->max_elements_per_iq =
3828		get_unaligned_le16(&capability->max_elements_per_iq);
3829	ctrl_info->max_iq_element_length =
3830		get_unaligned_le16(&capability->max_iq_element_length)
3831		* 16;
3832	ctrl_info->max_outbound_queues =
3833		get_unaligned_le16(&capability->max_outbound_queues);
3834	ctrl_info->max_elements_per_oq =
3835		get_unaligned_le16(&capability->max_elements_per_oq);
3836	ctrl_info->max_oq_element_length =
3837		get_unaligned_le16(&capability->max_oq_element_length)
3838		* 16;
3839
3840	sop_iu_layer_descriptor =
3841		&capability->iu_layer_descriptors[PQI_PROTOCOL_SOP];
3842
3843	ctrl_info->max_inbound_iu_length_per_firmware =
3844		get_unaligned_le16(
3845			&sop_iu_layer_descriptor->max_inbound_iu_length);
3846	ctrl_info->inbound_spanning_supported =
3847		sop_iu_layer_descriptor->inbound_spanning_supported;
3848	ctrl_info->outbound_spanning_supported =
3849		sop_iu_layer_descriptor->outbound_spanning_supported;
3850
3851out:
3852	kfree(capability);
3853
3854	return rc;
3855}
3856
3857static int pqi_validate_device_capability(struct pqi_ctrl_info *ctrl_info)
3858{
3859	if (ctrl_info->max_iq_element_length <
3860		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
3861		dev_err(&ctrl_info->pci_dev->dev,
3862			"max. inbound queue element length of %d is less than the required length of %d\n",
3863			ctrl_info->max_iq_element_length,
3864			PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3865		return -EINVAL;
3866	}
3867
3868	if (ctrl_info->max_oq_element_length <
3869		PQI_OPERATIONAL_OQ_ELEMENT_LENGTH) {
3870		dev_err(&ctrl_info->pci_dev->dev,
3871			"max. outbound queue element length of %d is less than the required length of %d\n",
3872			ctrl_info->max_oq_element_length,
3873			PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
3874		return -EINVAL;
3875	}
3876
3877	if (ctrl_info->max_inbound_iu_length_per_firmware <
3878		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
3879		dev_err(&ctrl_info->pci_dev->dev,
3880			"max. inbound IU length of %u is less than the min. required length of %d\n",
3881			ctrl_info->max_inbound_iu_length_per_firmware,
3882			PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3883		return -EINVAL;
3884	}
3885
3886	if (!ctrl_info->inbound_spanning_supported) {
3887		dev_err(&ctrl_info->pci_dev->dev,
3888			"the controller does not support inbound spanning\n");
3889		return -EINVAL;
3890	}
3891
3892	if (ctrl_info->outbound_spanning_supported) {
3893		dev_err(&ctrl_info->pci_dev->dev,
3894			"the controller supports outbound spanning but this driver does not\n");
3895		return -EINVAL;
3896	}
3897
3898	return 0;
3899}
3900
3901static int pqi_create_event_queue(struct pqi_ctrl_info *ctrl_info)
3902{
3903	int rc;
3904	struct pqi_event_queue *event_queue;
3905	struct pqi_general_admin_request request;
3906	struct pqi_general_admin_response response;
3907
3908	event_queue = &ctrl_info->event_queue;
3909
3910	/*
3911	 * Create OQ (Outbound Queue - device to host queue) to dedicate
3912	 * to events.
3913	 */
3914	memset(&request, 0, sizeof(request));
3915	request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3916	put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3917		&request.header.iu_length);
3918	request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
3919	put_unaligned_le16(event_queue->oq_id,
3920		&request.data.create_operational_oq.queue_id);
3921	put_unaligned_le64((u64)event_queue->oq_element_array_bus_addr,
3922		&request.data.create_operational_oq.element_array_addr);
3923	put_unaligned_le64((u64)event_queue->oq_pi_bus_addr,
3924		&request.data.create_operational_oq.pi_addr);
3925	put_unaligned_le16(PQI_NUM_EVENT_QUEUE_ELEMENTS,
3926		&request.data.create_operational_oq.num_elements);
3927	put_unaligned_le16(PQI_EVENT_OQ_ELEMENT_LENGTH / 16,
3928		&request.data.create_operational_oq.element_length);
3929	request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
3930	put_unaligned_le16(event_queue->int_msg_num,
3931		&request.data.create_operational_oq.int_msg_num);
3932
3933	rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
3934		&response);
3935	if (rc)
3936		return rc;
3937
3938	event_queue->oq_ci = ctrl_info->iomem_base +
3939		PQI_DEVICE_REGISTERS_OFFSET +
3940		get_unaligned_le64(
3941			&response.data.create_operational_oq.oq_ci_offset);
3942
3943	return 0;
3944}
3945
3946static int pqi_create_queue_group(struct pqi_ctrl_info *ctrl_info,
3947	unsigned int group_number)
3948{
3949	int rc;
3950	struct pqi_queue_group *queue_group;
3951	struct pqi_general_admin_request request;
3952	struct pqi_general_admin_response response;
3953
3954	queue_group = &ctrl_info->queue_groups[group_number];
3955
3956	/*
3957	 * Create IQ (Inbound Queue - host to device queue) for
3958	 * RAID path.
3959	 */
3960	memset(&request, 0, sizeof(request));
3961	request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3962	put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3963		&request.header.iu_length);
3964	request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
3965	put_unaligned_le16(queue_group->iq_id[RAID_PATH],
3966		&request.data.create_operational_iq.queue_id);
3967	put_unaligned_le64(
3968		(u64)queue_group->iq_element_array_bus_addr[RAID_PATH],
3969		&request.data.create_operational_iq.element_array_addr);
3970	put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[RAID_PATH],
3971		&request.data.create_operational_iq.ci_addr);
3972	put_unaligned_le16(ctrl_info->num_elements_per_iq,
3973		&request.data.create_operational_iq.num_elements);
3974	put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
3975		&request.data.create_operational_iq.element_length);
3976	request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
3977
3978	rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
3979		&response);
3980	if (rc) {
3981		dev_err(&ctrl_info->pci_dev->dev,
3982			"error creating inbound RAID queue\n");
3983		return rc;
3984	}
3985
3986	queue_group->iq_pi[RAID_PATH] = ctrl_info->iomem_base +
3987		PQI_DEVICE_REGISTERS_OFFSET +
3988		get_unaligned_le64(
3989			&response.data.create_operational_iq.iq_pi_offset);
3990
3991	/*
3992	 * Create IQ (Inbound Queue - host to device queue) for
3993	 * Advanced I/O (AIO) path.
3994	 */
3995	memset(&request, 0, sizeof(request));
3996	request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
3997	put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
3998		&request.header.iu_length);
3999	request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4000	put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4001		&request.data.create_operational_iq.queue_id);
4002	put_unaligned_le64((u64)queue_group->
4003		iq_element_array_bus_addr[AIO_PATH],
4004		&request.data.create_operational_iq.element_array_addr);
4005	put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[AIO_PATH],
4006		&request.data.create_operational_iq.ci_addr);
4007	put_unaligned_le16(ctrl_info->num_elements_per_iq,
4008		&request.data.create_operational_iq.num_elements);
4009	put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4010		&request.data.create_operational_iq.element_length);
4011	request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4012
4013	rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4014		&response);
4015	if (rc) {
4016		dev_err(&ctrl_info->pci_dev->dev,
4017			"error creating inbound AIO queue\n");
4018		return rc;
4019	}
4020
4021	queue_group->iq_pi[AIO_PATH] = ctrl_info->iomem_base +
4022		PQI_DEVICE_REGISTERS_OFFSET +
4023		get_unaligned_le64(
4024			&response.data.create_operational_iq.iq_pi_offset);
4025
4026	/*
4027	 * Designate the 2nd IQ as the AIO path.  By default, all IQs are
4028	 * assumed to be for RAID path I/O unless we change the queue's
4029	 * property.
4030	 */
4031	memset(&request, 0, sizeof(request));
4032	request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4033	put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4034		&request.header.iu_length);
4035	request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY;
4036	put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4037		&request.data.change_operational_iq_properties.queue_id);
4038	put_unaligned_le32(PQI_IQ_PROPERTY_IS_AIO_QUEUE,
4039		&request.data.change_operational_iq_properties.vendor_specific);
4040
4041	rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4042		&response);
4043	if (rc) {
4044		dev_err(&ctrl_info->pci_dev->dev,
4045			"error changing queue property\n");
4046		return rc;
4047	}
4048
4049	/*
4050	 * Create OQ (Outbound Queue - device to host queue).
4051	 */
4052	memset(&request, 0, sizeof(request));
4053	request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4054	put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4055		&request.header.iu_length);
4056	request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4057	put_unaligned_le16(queue_group->oq_id,
4058		&request.data.create_operational_oq.queue_id);
4059	put_unaligned_le64((u64)queue_group->oq_element_array_bus_addr,
4060		&request.data.create_operational_oq.element_array_addr);
4061	put_unaligned_le64((u64)queue_group->oq_pi_bus_addr,
4062		&request.data.create_operational_oq.pi_addr);
4063	put_unaligned_le16(ctrl_info->num_elements_per_oq,
4064		&request.data.create_operational_oq.num_elements);
4065	put_unaligned_le16(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH / 16,
4066		&request.data.create_operational_oq.element_length);
4067	request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4068	put_unaligned_le16(queue_group->int_msg_num,
4069		&request.data.create_operational_oq.int_msg_num);
4070
4071	rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4072		&response);
4073	if (rc) {
4074		dev_err(&ctrl_info->pci_dev->dev,
4075			"error creating outbound queue\n");
4076		return rc;
4077	}
4078
4079	queue_group->oq_ci = ctrl_info->iomem_base +
4080		PQI_DEVICE_REGISTERS_OFFSET +
4081		get_unaligned_le64(
4082			&response.data.create_operational_oq.oq_ci_offset);
4083
4084	return 0;
4085}
4086
4087static int pqi_create_queues(struct pqi_ctrl_info *ctrl_info)
4088{
4089	int rc;
4090	unsigned int i;
4091
4092	rc = pqi_create_event_queue(ctrl_info);
4093	if (rc) {
4094		dev_err(&ctrl_info->pci_dev->dev,
4095			"error creating event queue\n");
4096		return rc;
4097	}
4098
4099	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4100		rc = pqi_create_queue_group(ctrl_info, i);
4101		if (rc) {
4102			dev_err(&ctrl_info->pci_dev->dev,
4103				"error creating queue group number %u/%u\n",
4104				i, ctrl_info->num_queue_groups);
4105			return rc;
4106		}
4107	}
4108
4109	return 0;
4110}
4111
4112#define PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH	\
4113	(offsetof(struct pqi_event_config, descriptors) + \
4114	(PQI_MAX_EVENT_DESCRIPTORS * sizeof(struct pqi_event_descriptor)))
4115
4116static int pqi_configure_events(struct pqi_ctrl_info *ctrl_info,
4117	bool enable_events)
4118{
4119	int rc;
4120	unsigned int i;
4121	struct pqi_event_config *event_config;
4122	struct pqi_event_descriptor *event_descriptor;
4123	struct pqi_general_management_request request;
4124
4125	event_config = kmalloc(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4126		GFP_KERNEL);
4127	if (!event_config)
4128		return -ENOMEM;
4129
4130	memset(&request, 0, sizeof(request));
4131
4132	request.header.iu_type = PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG;
4133	put_unaligned_le16(offsetof(struct pqi_general_management_request,
4134		data.report_event_configuration.sg_descriptors[1]) -
4135		PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4136	put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4137		&request.data.report_event_configuration.buffer_length);
4138
4139	rc = pqi_map_single(ctrl_info->pci_dev,
4140		request.data.report_event_configuration.sg_descriptors,
4141		event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4142		PCI_DMA_FROMDEVICE);
4143	if (rc)
4144		goto out;
4145
4146	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
4147		0, NULL, NO_TIMEOUT);
4148
4149	pqi_pci_unmap(ctrl_info->pci_dev,
4150		request.data.report_event_configuration.sg_descriptors, 1,
4151		PCI_DMA_FROMDEVICE);
4152
4153	if (rc)
4154		goto out;
4155
4156	for (i = 0; i < event_config->num_event_descriptors; i++) {
4157		event_descriptor = &event_config->descriptors[i];
4158		if (enable_events &&
4159			pqi_is_supported_event(event_descriptor->event_type))
4160			put_unaligned_le16(ctrl_info->event_queue.oq_id,
4161					&event_descriptor->oq_id);
4162		else
4163			put_unaligned_le16(0, &event_descriptor->oq_id);
4164	}
4165
4166	memset(&request, 0, sizeof(request));
4167
4168	request.header.iu_type = PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG;
4169	put_unaligned_le16(offsetof(struct pqi_general_management_request,
4170		data.report_event_configuration.sg_descriptors[1]) -
4171		PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4172	put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4173		&request.data.report_event_configuration.buffer_length);
4174
4175	rc = pqi_map_single(ctrl_info->pci_dev,
4176		request.data.report_event_configuration.sg_descriptors,
4177		event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4178		PCI_DMA_TODEVICE);
4179	if (rc)
4180		goto out;
4181
4182	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
4183		NULL, NO_TIMEOUT);
4184
4185	pqi_pci_unmap(ctrl_info->pci_dev,
4186		request.data.report_event_configuration.sg_descriptors, 1,
4187		PCI_DMA_TODEVICE);
4188
4189out:
4190	kfree(event_config);
4191
4192	return rc;
4193}
4194
4195static inline int pqi_enable_events(struct pqi_ctrl_info *ctrl_info)
4196{
4197	return pqi_configure_events(ctrl_info, true);
4198}
4199
4200static inline int pqi_disable_events(struct pqi_ctrl_info *ctrl_info)
4201{
4202	return pqi_configure_events(ctrl_info, false);
4203}
4204
4205static void pqi_free_all_io_requests(struct pqi_ctrl_info *ctrl_info)
4206{
4207	unsigned int i;
4208	struct device *dev;
4209	size_t sg_chain_buffer_length;
4210	struct pqi_io_request *io_request;
4211
4212	if (!ctrl_info->io_request_pool)
4213		return;
4214
4215	dev = &ctrl_info->pci_dev->dev;
4216	sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4217	io_request = ctrl_info->io_request_pool;
4218
4219	for (i = 0; i < ctrl_info->max_io_slots; i++) {
4220		kfree(io_request->iu);
4221		if (!io_request->sg_chain_buffer)
4222			break;
4223		dma_free_coherent(dev, sg_chain_buffer_length,
4224			io_request->sg_chain_buffer,
4225			io_request->sg_chain_buffer_dma_handle);
4226		io_request++;
4227	}
4228
4229	kfree(ctrl_info->io_request_pool);
4230	ctrl_info->io_request_pool = NULL;
4231}
4232
4233static inline int pqi_alloc_error_buffer(struct pqi_ctrl_info *ctrl_info)
4234{
4235	ctrl_info->error_buffer = dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
4236		ctrl_info->error_buffer_length,
4237		&ctrl_info->error_buffer_dma_handle, GFP_KERNEL);
4238
4239	if (!ctrl_info->error_buffer)
4240		return -ENOMEM;
4241
4242	return 0;
4243}
4244
4245static int pqi_alloc_io_resources(struct pqi_ctrl_info *ctrl_info)
4246{
4247	unsigned int i;
4248	void *sg_chain_buffer;
4249	size_t sg_chain_buffer_length;
4250	dma_addr_t sg_chain_buffer_dma_handle;
4251	struct device *dev;
4252	struct pqi_io_request *io_request;
4253
4254	ctrl_info->io_request_pool = kzalloc(ctrl_info->max_io_slots *
4255		sizeof(ctrl_info->io_request_pool[0]), GFP_KERNEL);
4256
4257	if (!ctrl_info->io_request_pool) {
4258		dev_err(&ctrl_info->pci_dev->dev,
4259			"failed to allocate I/O request pool\n");
4260		goto error;
4261	}
4262
4263	dev = &ctrl_info->pci_dev->dev;
4264	sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4265	io_request = ctrl_info->io_request_pool;
4266
4267	for (i = 0; i < ctrl_info->max_io_slots; i++) {
4268		io_request->iu =
4269			kmalloc(ctrl_info->max_inbound_iu_length, GFP_KERNEL);
4270
4271		if (!io_request->iu) {
4272			dev_err(&ctrl_info->pci_dev->dev,
4273				"failed to allocate IU buffers\n");
4274			goto error;
4275		}
4276
4277		sg_chain_buffer = dma_alloc_coherent(dev,
4278			sg_chain_buffer_length, &sg_chain_buffer_dma_handle,
4279			GFP_KERNEL);
4280
4281		if (!sg_chain_buffer) {
4282			dev_err(&ctrl_info->pci_dev->dev,
4283				"failed to allocate PQI scatter-gather chain buffers\n");
4284			goto error;
4285		}
4286
4287		io_request->index = i;
4288		io_request->sg_chain_buffer = sg_chain_buffer;
4289		io_request->sg_chain_buffer_dma_handle =
4290			sg_chain_buffer_dma_handle;
4291		io_request++;
4292	}
4293
4294	return 0;
4295
4296error:
4297	pqi_free_all_io_requests(ctrl_info);
4298
4299	return -ENOMEM;
4300}
4301
4302/*
4303 * Calculate required resources that are sized based on max. outstanding
4304 * requests and max. transfer size.
4305 */
4306
4307static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
4308{
4309	u32 max_transfer_size;
4310	u32 max_sg_entries;
4311
4312	ctrl_info->scsi_ml_can_queue =
4313		ctrl_info->max_outstanding_requests - PQI_RESERVED_IO_SLOTS;
4314	ctrl_info->max_io_slots = ctrl_info->max_outstanding_requests;
4315
4316	ctrl_info->error_buffer_length =
4317		ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH;
4318
4319	if (reset_devices)
4320		max_transfer_size = min(ctrl_info->max_transfer_size,
4321			PQI_MAX_TRANSFER_SIZE_KDUMP);
4322	else
4323		max_transfer_size = min(ctrl_info->max_transfer_size,
4324			PQI_MAX_TRANSFER_SIZE);
4325
4326	max_sg_entries = max_transfer_size / PAGE_SIZE;
4327
4328	/* +1 to cover when the buffer is not page-aligned. */
4329	max_sg_entries++;
4330
4331	max_sg_entries = min(ctrl_info->max_sg_entries, max_sg_entries);
4332
4333	max_transfer_size = (max_sg_entries - 1) * PAGE_SIZE;
4334
4335	ctrl_info->sg_chain_buffer_length =
4336		(max_sg_entries * sizeof(struct pqi_sg_descriptor)) +
4337		PQI_EXTRA_SGL_MEMORY;
4338	ctrl_info->sg_tablesize = max_sg_entries;
4339	ctrl_info->max_sectors = max_transfer_size / 512;
4340}
4341
4342static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info)
4343{
4344	int num_queue_groups;
4345	u16 num_elements_per_iq;
4346	u16 num_elements_per_oq;
4347
4348	if (reset_devices) {
4349		num_queue_groups = 1;
4350	} else {
4351		int num_cpus;
4352		int max_queue_groups;
4353
4354		max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
4355			ctrl_info->max_outbound_queues - 1);
4356		max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
4357
4358		num_cpus = num_online_cpus();
4359		num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
4360		num_queue_groups = min(num_queue_groups, max_queue_groups);
4361	}
4362
4363	ctrl_info->num_queue_groups = num_queue_groups;
4364	ctrl_info->max_hw_queue_index = num_queue_groups - 1;
4365
4366	/*
4367	 * Make sure that the max. inbound IU length is an even multiple
4368	 * of our inbound element length.
4369	 */
4370	ctrl_info->max_inbound_iu_length =
4371		(ctrl_info->max_inbound_iu_length_per_firmware /
4372		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) *
4373		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
4374
4375	num_elements_per_iq =
4376		(ctrl_info->max_inbound_iu_length /
4377		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4378
4379	/* Add one because one element in each queue is unusable. */
4380	num_elements_per_iq++;
4381
4382	num_elements_per_iq = min(num_elements_per_iq,
4383		ctrl_info->max_elements_per_iq);
4384
4385	num_elements_per_oq = ((num_elements_per_iq - 1) * 2) + 1;
4386	num_elements_per_oq = min(num_elements_per_oq,
4387		ctrl_info->max_elements_per_oq);
4388
4389	ctrl_info->num_elements_per_iq = num_elements_per_iq;
4390	ctrl_info->num_elements_per_oq = num_elements_per_oq;
4391
4392	ctrl_info->max_sg_per_iu =
4393		((ctrl_info->max_inbound_iu_length -
4394		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
4395		sizeof(struct pqi_sg_descriptor)) +
4396		PQI_MAX_EMBEDDED_SG_DESCRIPTORS;
4397}
4398
4399static inline void pqi_set_sg_descriptor(
4400	struct pqi_sg_descriptor *sg_descriptor, struct scatterlist *sg)
4401{
4402	u64 address = (u64)sg_dma_address(sg);
4403	unsigned int length = sg_dma_len(sg);
4404
4405	put_unaligned_le64(address, &sg_descriptor->address);
4406	put_unaligned_le32(length, &sg_descriptor->length);
4407	put_unaligned_le32(0, &sg_descriptor->flags);
4408}
4409
4410static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
4411	struct pqi_raid_path_request *request, struct scsi_cmnd *scmd,
4412	struct pqi_io_request *io_request)
4413{
4414	int i;
4415	u16 iu_length;
4416	int sg_count;
4417	bool chained;
4418	unsigned int num_sg_in_iu;
4419	unsigned int max_sg_per_iu;
4420	struct scatterlist *sg;
4421	struct pqi_sg_descriptor *sg_descriptor;
4422
4423	sg_count = scsi_dma_map(scmd);
4424	if (sg_count < 0)
4425		return sg_count;
4426
4427	iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
4428		PQI_REQUEST_HEADER_LENGTH;
4429
4430	if (sg_count == 0)
4431		goto out;
4432
4433	sg = scsi_sglist(scmd);
4434	sg_descriptor = request->sg_descriptors;
4435	max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4436	chained = false;
4437	num_sg_in_iu = 0;
4438	i = 0;
4439
4440	while (1) {
4441		pqi_set_sg_descriptor(sg_descriptor, sg);
4442		if (!chained)
4443			num_sg_in_iu++;
4444		i++;
4445		if (i == sg_count)
4446			break;
4447		sg_descriptor++;
4448		if (i == max_sg_per_iu) {
4449			put_unaligned_le64(
4450				(u64)io_request->sg_chain_buffer_dma_handle,
4451				&sg_descriptor->address);
4452			put_unaligned_le32((sg_count - num_sg_in_iu)
4453				* sizeof(*sg_descriptor),
4454				&sg_descriptor->length);
4455			put_unaligned_le32(CISS_SG_CHAIN,
4456				&sg_descriptor->flags);
4457			chained = true;
4458			num_sg_in_iu++;
4459			sg_descriptor = io_request->sg_chain_buffer;
4460		}
4461		sg = sg_next(sg);
4462	}
4463
4464	put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4465	request->partial = chained;
4466	iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4467
4468out:
4469	put_unaligned_le16(iu_length, &request->header.iu_length);
4470
4471	return 0;
4472}
4473
4474static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
4475	struct pqi_aio_path_request *request, struct scsi_cmnd *scmd,
4476	struct pqi_io_request *io_request)
4477{
4478	int i;
4479	u16 iu_length;
4480	int sg_count;
4481	bool chained;
4482	unsigned int num_sg_in_iu;
4483	unsigned int max_sg_per_iu;
4484	struct scatterlist *sg;
4485	struct pqi_sg_descriptor *sg_descriptor;
4486
4487	sg_count = scsi_dma_map(scmd);
4488	if (sg_count < 0)
4489		return sg_count;
4490
4491	iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) -
4492		PQI_REQUEST_HEADER_LENGTH;
4493	num_sg_in_iu = 0;
4494
4495	if (sg_count == 0)
4496		goto out;
4497
4498	sg = scsi_sglist(scmd);
4499	sg_descriptor = request->sg_descriptors;
4500	max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4501	chained = false;
4502	i = 0;
4503
4504	while (1) {
4505		pqi_set_sg_descriptor(sg_descriptor, sg);
4506		if (!chained)
4507			num_sg_in_iu++;
4508		i++;
4509		if (i == sg_count)
4510			break;
4511		sg_descriptor++;
4512		if (i == max_sg_per_iu) {
4513			put_unaligned_le64(
4514				(u64)io_request->sg_chain_buffer_dma_handle,
4515				&sg_descriptor->address);
4516			put_unaligned_le32((sg_count - num_sg_in_iu)
4517				* sizeof(*sg_descriptor),
4518				&sg_descriptor->length);
4519			put_unaligned_le32(CISS_SG_CHAIN,
4520				&sg_descriptor->flags);
4521			chained = true;
4522			num_sg_in_iu++;
4523			sg_descriptor = io_request->sg_chain_buffer;
4524		}
4525		sg = sg_next(sg);
4526	}
4527
4528	put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4529	request->partial = chained;
4530	iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4531
4532out:
4533	put_unaligned_le16(iu_length, &request->header.iu_length);
4534	request->num_sg_descriptors = num_sg_in_iu;
4535
4536	return 0;
4537}
4538
4539static void pqi_raid_io_complete(struct pqi_io_request *io_request,
4540	void *context)
4541{
4542	struct scsi_cmnd *scmd;
4543
4544	scmd = io_request->scmd;
4545	pqi_free_io_request(io_request);
4546	scsi_dma_unmap(scmd);
4547	pqi_scsi_done(scmd);
4548}
4549
4550static int pqi_raid_submit_scsi_cmd_with_io_request(
4551	struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
4552	struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4553	struct pqi_queue_group *queue_group)
4554{
4555	int rc;
4556	size_t cdb_length;
4557	struct pqi_raid_path_request *request;
4558
4559	io_request->io_complete_callback = pqi_raid_io_complete;
4560	io_request->scmd = scmd;
4561
4562	request = io_request->iu;
4563	memset(request, 0,
4564		offsetof(struct pqi_raid_path_request, sg_descriptors));
4565
4566	request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
4567	put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
4568	request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
4569	put_unaligned_le16(io_request->index, &request->request_id);
4570	request->error_index = request->request_id;
4571	memcpy(request->lun_number, device->scsi3addr,
4572		sizeof(request->lun_number));
4573
4574	cdb_length = min_t(size_t, scmd->cmd_len, sizeof(request->cdb));
4575	memcpy(request->cdb, scmd->cmnd, cdb_length);
4576
4577	switch (cdb_length) {
4578	case 6:
4579	case 10:
4580	case 12:
4581	case 16:
4582		/* No bytes in the Additional CDB bytes field */
4583		request->additional_cdb_bytes_usage =
4584			SOP_ADDITIONAL_CDB_BYTES_0;
4585		break;
4586	case 20:
4587		/* 4 bytes in the Additional cdb field */
4588		request->additional_cdb_bytes_usage =
4589			SOP_ADDITIONAL_CDB_BYTES_4;
4590		break;
4591	case 24:
4592		/* 8 bytes in the Additional cdb field */
4593		request->additional_cdb_bytes_usage =
4594			SOP_ADDITIONAL_CDB_BYTES_8;
4595		break;
4596	case 28:
4597		/* 12 bytes in the Additional cdb field */
4598		request->additional_cdb_bytes_usage =
4599			SOP_ADDITIONAL_CDB_BYTES_12;
4600		break;
4601	case 32:
4602	default:
4603		/* 16 bytes in the Additional cdb field */
4604		request->additional_cdb_bytes_usage =
4605			SOP_ADDITIONAL_CDB_BYTES_16;
4606		break;
4607	}
4608
4609	switch (scmd->sc_data_direction) {
4610	case DMA_TO_DEVICE:
4611		request->data_direction = SOP_READ_FLAG;
4612		break;
4613	case DMA_FROM_DEVICE:
4614		request->data_direction = SOP_WRITE_FLAG;
4615		break;
4616	case DMA_NONE:
4617		request->data_direction = SOP_NO_DIRECTION_FLAG;
4618		break;
4619	case DMA_BIDIRECTIONAL:
4620		request->data_direction = SOP_BIDIRECTIONAL;
4621		break;
4622	default:
4623		dev_err(&ctrl_info->pci_dev->dev,
4624			"unknown data direction: %d\n",
4625			scmd->sc_data_direction);
4626		break;
4627	}
4628
4629	rc = pqi_build_raid_sg_list(ctrl_info, request, scmd, io_request);
4630	if (rc) {
4631		pqi_free_io_request(io_request);
4632		return SCSI_MLQUEUE_HOST_BUSY;
4633	}
4634
4635	pqi_start_io(ctrl_info, queue_group, RAID_PATH, io_request);
4636
4637	return 0;
4638}
4639
4640static inline int pqi_raid_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
4641	struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4642	struct pqi_queue_group *queue_group)
4643{
4644	struct pqi_io_request *io_request;
4645
4646	io_request = pqi_alloc_io_request(ctrl_info);
4647
4648	return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
4649		device, scmd, queue_group);
4650}
4651
4652static inline void pqi_schedule_bypass_retry(struct pqi_ctrl_info *ctrl_info)
4653{
4654	if (!pqi_ctrl_blocked(ctrl_info))
4655		schedule_work(&ctrl_info->raid_bypass_retry_work);
4656}
4657
4658static bool pqi_raid_bypass_retry_needed(struct pqi_io_request *io_request)
4659{
4660	struct scsi_cmnd *scmd;
4661	struct pqi_scsi_dev *device;
4662	struct pqi_ctrl_info *ctrl_info;
4663
4664	if (!io_request->raid_bypass)
4665		return false;
4666
4667	scmd = io_request->scmd;
4668	if ((scmd->result & 0xff) == SAM_STAT_GOOD)
4669		return false;
4670	if (host_byte(scmd->result) == DID_NO_CONNECT)
4671		return false;
4672
4673	device = scmd->device->hostdata;
4674	if (pqi_device_offline(device))
4675		return false;
4676
4677	ctrl_info = shost_to_hba(scmd->device->host);
4678	if (pqi_ctrl_offline(ctrl_info))
4679		return false;
4680
4681	return true;
4682}
4683
4684static inline void pqi_add_to_raid_bypass_retry_list(
4685	struct pqi_ctrl_info *ctrl_info,
4686	struct pqi_io_request *io_request, bool at_head)
4687{
4688	unsigned long flags;
4689
4690	spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
4691	if (at_head)
4692		list_add(&io_request->request_list_entry,
4693			&ctrl_info->raid_bypass_retry_list);
4694	else
4695		list_add_tail(&io_request->request_list_entry,
4696			&ctrl_info->raid_bypass_retry_list);
4697	spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
4698}
4699
4700static void pqi_queued_raid_bypass_complete(struct pqi_io_request *io_request,
4701	void *context)
4702{
4703	struct scsi_cmnd *scmd;
4704
4705	scmd = io_request->scmd;
4706	pqi_free_io_request(io_request);
4707	pqi_scsi_done(scmd);
4708}
4709
4710static void pqi_queue_raid_bypass_retry(struct pqi_io_request *io_request)
4711{
4712	struct scsi_cmnd *scmd;
4713	struct pqi_ctrl_info *ctrl_info;
4714
4715	io_request->io_complete_callback = pqi_queued_raid_bypass_complete;
4716	scmd = io_request->scmd;
4717	scmd->result = 0;
4718	ctrl_info = shost_to_hba(scmd->device->host);
4719
4720	pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request, false);
4721	pqi_schedule_bypass_retry(ctrl_info);
4722}
4723
4724static int pqi_retry_raid_bypass(struct pqi_io_request *io_request)
4725{
4726	struct scsi_cmnd *scmd;
4727	struct pqi_scsi_dev *device;
4728	struct pqi_ctrl_info *ctrl_info;
4729	struct pqi_queue_group *queue_group;
4730
4731	scmd = io_request->scmd;
4732	device = scmd->device->hostdata;
4733	if (pqi_device_in_reset(device)) {
4734		pqi_free_io_request(io_request);
4735		set_host_byte(scmd, DID_RESET);
4736		pqi_scsi_done(scmd);
4737		return 0;
4738	}
4739
4740	ctrl_info = shost_to_hba(scmd->device->host);
4741	queue_group = io_request->queue_group;
4742
4743	pqi_reinit_io_request(io_request);
4744
4745	return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
4746		device, scmd, queue_group);
4747}
4748
4749static inline struct pqi_io_request *pqi_next_queued_raid_bypass_request(
4750	struct pqi_ctrl_info *ctrl_info)
4751{
4752	unsigned long flags;
4753	struct pqi_io_request *io_request;
4754
4755	spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
4756	io_request = list_first_entry_or_null(
4757		&ctrl_info->raid_bypass_retry_list,
4758		struct pqi_io_request, request_list_entry);
4759	if (io_request)
4760		list_del(&io_request->request_list_entry);
4761	spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
4762
4763	return io_request;
4764}
4765
4766static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info)
4767{
4768	int rc;
4769	struct pqi_io_request *io_request;
4770
4771	pqi_ctrl_busy(ctrl_info);
4772
4773	while (1) {
4774		if (pqi_ctrl_blocked(ctrl_info))
4775			break;
4776		io_request = pqi_next_queued_raid_bypass_request(ctrl_info);
4777		if (!io_request)
4778			break;
4779		rc = pqi_retry_raid_bypass(io_request);
4780		if (rc) {
4781			pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request,
4782				true);
4783			pqi_schedule_bypass_retry(ctrl_info);
4784			break;
4785		}
4786	}
4787
4788	pqi_ctrl_unbusy(ctrl_info);
4789}
4790
4791static void pqi_raid_bypass_retry_worker(struct work_struct *work)
4792{
4793	struct pqi_ctrl_info *ctrl_info;
4794
4795	ctrl_info = container_of(work, struct pqi_ctrl_info,
4796		raid_bypass_retry_work);
4797	pqi_retry_raid_bypass_requests(ctrl_info);
4798}
4799
4800static void pqi_clear_all_queued_raid_bypass_retries(
4801	struct pqi_ctrl_info *ctrl_info)
4802{
4803	unsigned long flags;
4804
4805	spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
4806	INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
4807	spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
4808}
4809
4810static void pqi_aio_io_complete(struct pqi_io_request *io_request,
4811	void *context)
4812{
4813	struct scsi_cmnd *scmd;
4814
4815	scmd = io_request->scmd;
4816	scsi_dma_unmap(scmd);
4817	if (io_request->status == -EAGAIN)
4818		set_host_byte(scmd, DID_IMM_RETRY);
4819	else if (pqi_raid_bypass_retry_needed(io_request)) {
4820		pqi_queue_raid_bypass_retry(io_request);
4821		return;
4822	}
4823	pqi_free_io_request(io_request);
4824	pqi_scsi_done(scmd);
4825}
4826
4827static inline int pqi_aio_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
4828	struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4829	struct pqi_queue_group *queue_group)
4830{
4831	return pqi_aio_submit_io(ctrl_info, scmd, device->aio_handle,
4832		scmd->cmnd, scmd->cmd_len, queue_group, NULL, false);
4833}
4834
4835static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
4836	struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
4837	unsigned int cdb_length, struct pqi_queue_group *queue_group,
4838	struct pqi_encryption_info *encryption_info, bool raid_bypass)
4839{
4840	int rc;
4841	struct pqi_io_request *io_request;
4842	struct pqi_aio_path_request *request;
4843
4844	io_request = pqi_alloc_io_request(ctrl_info);
4845	io_request->io_complete_callback = pqi_aio_io_complete;
4846	io_request->scmd = scmd;
4847	io_request->raid_bypass = raid_bypass;
4848
4849	request = io_request->iu;
4850	memset(request, 0,
4851		offsetof(struct pqi_raid_path_request, sg_descriptors));
4852
4853	request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_IO;
4854	put_unaligned_le32(aio_handle, &request->nexus_id);
4855	put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
4856	request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
4857	put_unaligned_le16(io_request->index, &request->request_id);
4858	request->error_index = request->request_id;
4859	if (cdb_length > sizeof(request->cdb))
4860		cdb_length = sizeof(request->cdb);
4861	request->cdb_length = cdb_length;
4862	memcpy(request->cdb, cdb, cdb_length);
4863
4864	switch (scmd->sc_data_direction) {
4865	case DMA_TO_DEVICE:
4866		request->data_direction = SOP_READ_FLAG;
4867		break;
4868	case DMA_FROM_DEVICE:
4869		request->data_direction = SOP_WRITE_FLAG;
4870		break;
4871	case DMA_NONE:
4872		request->data_direction = SOP_NO_DIRECTION_FLAG;
4873		break;
4874	case DMA_BIDIRECTIONAL:
4875		request->data_direction = SOP_BIDIRECTIONAL;
4876		break;
4877	default:
4878		dev_err(&ctrl_info->pci_dev->dev,
4879			"unknown data direction: %d\n",
4880			scmd->sc_data_direction);
4881		break;
4882	}
4883
4884	if (encryption_info) {
4885		request->encryption_enable = true;
4886		put_unaligned_le16(encryption_info->data_encryption_key_index,
4887			&request->data_encryption_key_index);
4888		put_unaligned_le32(encryption_info->encrypt_tweak_lower,
4889			&request->encrypt_tweak_lower);
4890		put_unaligned_le32(encryption_info->encrypt_tweak_upper,
4891			&request->encrypt_tweak_upper);
4892	}
4893
4894	rc = pqi_build_aio_sg_list(ctrl_info, request, scmd, io_request);
4895	if (rc) {
4896		pqi_free_io_request(io_request);
4897		return SCSI_MLQUEUE_HOST_BUSY;
4898	}
4899
4900	pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
4901
4902	return 0;
4903}
4904
4905static inline u16 pqi_get_hw_queue(struct pqi_ctrl_info *ctrl_info,
4906	struct scsi_cmnd *scmd)
4907{
4908	u16 hw_queue;
4909
4910	hw_queue = blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scmd->request));
4911	if (hw_queue > ctrl_info->max_hw_queue_index)
4912		hw_queue = 0;
4913
4914	return hw_queue;
4915}
4916
4917/*
4918 * This function gets called just before we hand the completed SCSI request
4919 * back to the SML.
4920 */
4921
4922void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd)
4923{
4924	struct pqi_scsi_dev *device;
4925
4926	device = scmd->device->hostdata;
4927	atomic_dec(&device->scsi_cmds_outstanding);
4928}
4929
4930static int pqi_scsi_queue_command(struct Scsi_Host *shost,
4931	struct scsi_cmnd *scmd)
4932{
4933	int rc;
4934	struct pqi_ctrl_info *ctrl_info;
4935	struct pqi_scsi_dev *device;
4936	u16 hw_queue;
4937	struct pqi_queue_group *queue_group;
4938	bool raid_bypassed;
4939
4940	device = scmd->device->hostdata;
4941	ctrl_info = shost_to_hba(shost);
4942
4943	atomic_inc(&device->scsi_cmds_outstanding);
4944
4945	if (pqi_ctrl_offline(ctrl_info)) {
4946		set_host_byte(scmd, DID_NO_CONNECT);
4947		pqi_scsi_done(scmd);
4948		return 0;
4949	}
4950
4951	pqi_ctrl_busy(ctrl_info);
4952	if (pqi_ctrl_blocked(ctrl_info) || pqi_device_in_reset(device)) {
4953		rc = SCSI_MLQUEUE_HOST_BUSY;
4954		goto out;
4955	}
4956
4957	/*
4958	 * This is necessary because the SML doesn't zero out this field during
4959	 * error recovery.
4960	 */
4961	scmd->result = 0;
4962
4963	hw_queue = pqi_get_hw_queue(ctrl_info, scmd);
4964	queue_group = &ctrl_info->queue_groups[hw_queue];
4965
4966	if (pqi_is_logical_device(device)) {
4967		raid_bypassed = false;
4968		if (device->raid_bypass_enabled &&
4969				!blk_rq_is_passthrough(scmd->request)) {
4970			rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device,
4971				scmd, queue_group);
4972			if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY)
4973				raid_bypassed = true;
4974		}
4975		if (!raid_bypassed)
4976			rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
4977				queue_group);
4978	} else {
4979		if (device->aio_enabled)
4980			rc = pqi_aio_submit_scsi_cmd(ctrl_info, device, scmd,
4981				queue_group);
4982		else
4983			rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
4984				queue_group);
4985	}
4986
4987out:
4988	pqi_ctrl_unbusy(ctrl_info);
4989	if (rc)
4990		atomic_dec(&device->scsi_cmds_outstanding);
4991
4992	return rc;
4993}
4994
4995static int pqi_wait_until_queued_io_drained(struct pqi_ctrl_info *ctrl_info,
4996	struct pqi_queue_group *queue_group)
4997{
4998	unsigned int path;
4999	unsigned long flags;
5000	bool list_is_empty;
5001
5002	for (path = 0; path < 2; path++) {
5003		while (1) {
5004			spin_lock_irqsave(
5005				&queue_group->submit_lock[path], flags);
5006			list_is_empty =
5007				list_empty(&queue_group->request_list[path]);
5008			spin_unlock_irqrestore(
5009				&queue_group->submit_lock[path], flags);
5010			if (list_is_empty)
5011				break;
5012			pqi_check_ctrl_health(ctrl_info);
5013			if (pqi_ctrl_offline(ctrl_info))
5014				return -ENXIO;
5015			usleep_range(1000, 2000);
5016		}
5017	}
5018
5019	return 0;
5020}
5021
5022static int pqi_wait_until_inbound_queues_empty(struct pqi_ctrl_info *ctrl_info)
5023{
5024	int rc;
5025	unsigned int i;
5026	unsigned int path;
5027	struct pqi_queue_group *queue_group;
5028	pqi_index_t iq_pi;
5029	pqi_index_t iq_ci;
5030
5031	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5032		queue_group = &ctrl_info->queue_groups[i];
5033
5034		rc = pqi_wait_until_queued_io_drained(ctrl_info, queue_group);
5035		if (rc)
5036			return rc;
5037
5038		for (path = 0; path < 2; path++) {
5039			iq_pi = queue_group->iq_pi_copy[path];
5040
5041			while (1) {
5042				iq_ci = *queue_group->iq_ci[path];
5043				if (iq_ci == iq_pi)
5044					break;
5045				pqi_check_ctrl_health(ctrl_info);
5046				if (pqi_ctrl_offline(ctrl_info))
5047					return -ENXIO;
5048				usleep_range(1000, 2000);
5049			}
5050		}
5051	}
5052
5053	return 0;
5054}
5055
5056static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info,
5057	struct pqi_scsi_dev *device)
5058{
5059	unsigned int i;
5060	unsigned int path;
5061	struct pqi_queue_group *queue_group;
5062	unsigned long flags;
5063	struct pqi_io_request *io_request;
5064	struct pqi_io_request *next;
5065	struct scsi_cmnd *scmd;
5066	struct pqi_scsi_dev *scsi_device;
5067
5068	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5069		queue_group = &ctrl_info->queue_groups[i];
5070
5071		for (path = 0; path < 2; path++) {
5072			spin_lock_irqsave(
5073				&queue_group->submit_lock[path], flags);
5074
5075			list_for_each_entry_safe(io_request, next,
5076				&queue_group->request_list[path],
5077				request_list_entry) {
5078				scmd = io_request->scmd;
5079				if (!scmd)
5080					continue;
5081
5082				scsi_device = scmd->device->hostdata;
5083				if (scsi_device != device)
5084					continue;
5085
5086				list_del(&io_request->request_list_entry);
5087				set_host_byte(scmd, DID_RESET);
5088				pqi_scsi_done(scmd);
5089			}
5090
5091			spin_unlock_irqrestore(
5092				&queue_group->submit_lock[path], flags);
5093		}
5094	}
5095}
5096
5097static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
5098	struct pqi_scsi_dev *device)
5099{
5100	while (atomic_read(&device->scsi_cmds_outstanding)) {
5101		pqi_check_ctrl_health(ctrl_info);
5102		if (pqi_ctrl_offline(ctrl_info))
5103			return -ENXIO;
5104		usleep_range(1000, 2000);
5105	}
5106
5107	return 0;
5108}
5109
5110static int pqi_ctrl_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info)
5111{
5112	bool io_pending;
5113	unsigned long flags;
5114	struct pqi_scsi_dev *device;
5115
5116	while (1) {
5117		io_pending = false;
5118
5119		spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5120		list_for_each_entry(device, &ctrl_info->scsi_device_list,
5121			scsi_device_list_entry) {
5122			if (atomic_read(&device->scsi_cmds_outstanding)) {
5123				io_pending = true;
5124				break;
5125			}
5126		}
5127		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
5128					flags);
5129
5130		if (!io_pending)
5131			break;
5132
5133		pqi_check_ctrl_health(ctrl_info);
5134		if (pqi_ctrl_offline(ctrl_info))
5135			return -ENXIO;
5136
5137		usleep_range(1000, 2000);
5138	}
5139
5140	return 0;
5141}
5142
5143static void pqi_lun_reset_complete(struct pqi_io_request *io_request,
5144	void *context)
5145{
5146	struct completion *waiting = context;
5147
5148	complete(waiting);
5149}
5150
5151#define PQI_LUN_RESET_TIMEOUT_SECS	10
5152
5153static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info,
5154	struct pqi_scsi_dev *device, struct completion *wait)
5155{
5156	int rc;
5157
5158	while (1) {
5159		if (wait_for_completion_io_timeout(wait,
5160			PQI_LUN_RESET_TIMEOUT_SECS * HZ)) {
5161			rc = 0;
5162			break;
5163		}
5164
5165		pqi_check_ctrl_health(ctrl_info);
5166		if (pqi_ctrl_offline(ctrl_info)) {
5167			rc = -ENXIO;
5168			break;
5169		}
5170	}
5171
5172	return rc;
5173}
5174
5175static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info,
5176	struct pqi_scsi_dev *device)
5177{
5178	int rc;
5179	struct pqi_io_request *io_request;
5180	DECLARE_COMPLETION_ONSTACK(wait);
5181	struct pqi_task_management_request *request;
5182
5183	io_request = pqi_alloc_io_request(ctrl_info);
5184	io_request->io_complete_callback = pqi_lun_reset_complete;
5185	io_request->context = &wait;
5186
5187	request = io_request->iu;
5188	memset(request, 0, sizeof(*request));
5189
5190	request->header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT;
5191	put_unaligned_le16(sizeof(*request) - PQI_REQUEST_HEADER_LENGTH,
5192		&request->header.iu_length);
5193	put_unaligned_le16(io_request->index, &request->request_id);
5194	memcpy(request->lun_number, device->scsi3addr,
5195		sizeof(request->lun_number));
5196	request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET;
5197
5198	pqi_start_io(ctrl_info,
5199		&ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
5200		io_request);
5201
5202	rc = pqi_wait_for_lun_reset_completion(ctrl_info, device, &wait);
5203	if (rc == 0)
5204		rc = io_request->status;
5205
5206	pqi_free_io_request(io_request);
5207
5208	return rc;
5209}
5210
5211/* Performs a reset at the LUN level. */
5212
5213static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info,
5214	struct pqi_scsi_dev *device)
5215{
5216	int rc;
5217
5218	rc = pqi_lun_reset(ctrl_info, device);
5219	if (rc == 0)
5220		rc = pqi_device_wait_for_pending_io(ctrl_info, device);
5221
5222	return rc == 0 ? SUCCESS : FAILED;
5223}
5224
5225static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd)
5226{
5227	int rc;
5228	struct Scsi_Host *shost;
5229	struct pqi_ctrl_info *ctrl_info;
5230	struct pqi_scsi_dev *device;
5231
5232	shost = scmd->device->host;
5233	ctrl_info = shost_to_hba(shost);
5234	device = scmd->device->hostdata;
5235
5236	dev_err(&ctrl_info->pci_dev->dev,
5237		"resetting scsi %d:%d:%d:%d\n",
5238		shost->host_no, device->bus, device->target, device->lun);
5239
5240	pqi_check_ctrl_health(ctrl_info);
5241	if (pqi_ctrl_offline(ctrl_info)) {
5242		rc = FAILED;
5243		goto out;
5244	}
5245
5246	mutex_lock(&ctrl_info->lun_reset_mutex);
5247
5248	pqi_ctrl_block_requests(ctrl_info);
5249	pqi_ctrl_wait_until_quiesced(ctrl_info);
5250	pqi_fail_io_queued_for_device(ctrl_info, device);
5251	rc = pqi_wait_until_inbound_queues_empty(ctrl_info);
5252	pqi_device_reset_start(device);
5253	pqi_ctrl_unblock_requests(ctrl_info);
5254
5255	if (rc)
5256		rc = FAILED;
5257	else
5258		rc = pqi_device_reset(ctrl_info, device);
5259
5260	pqi_device_reset_done(device);
5261
5262	mutex_unlock(&ctrl_info->lun_reset_mutex);
5263
5264out:
5265	dev_err(&ctrl_info->pci_dev->dev,
5266		"reset of scsi %d:%d:%d:%d: %s\n",
5267		shost->host_no, device->bus, device->target, device->lun,
5268		rc == SUCCESS ? "SUCCESS" : "FAILED");
5269
5270	return rc;
5271}
5272
5273static int pqi_slave_alloc(struct scsi_device *sdev)
5274{
5275	struct pqi_scsi_dev *device;
5276	unsigned long flags;
5277	struct pqi_ctrl_info *ctrl_info;
5278	struct scsi_target *starget;
5279	struct sas_rphy *rphy;
5280
5281	ctrl_info = shost_to_hba(sdev->host);
5282
5283	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5284
5285	if (sdev_channel(sdev) == PQI_PHYSICAL_DEVICE_BUS) {
5286		starget = scsi_target(sdev);
5287		rphy = target_to_rphy(starget);
5288		device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
5289		if (device) {
5290			device->target = sdev_id(sdev);
5291			device->lun = sdev->lun;
5292			device->target_lun_valid = true;
5293		}
5294	} else {
5295		device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev),
5296			sdev_id(sdev), sdev->lun);
5297	}
5298
5299	if (device) {
5300		sdev->hostdata = device;
5301		device->sdev = sdev;
5302		if (device->queue_depth) {
5303			device->advertised_queue_depth = device->queue_depth;
5304			scsi_change_queue_depth(sdev,
5305				device->advertised_queue_depth);
5306		}
5307	}
5308
5309	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5310
5311	return 0;
5312}
5313
5314static int pqi_map_queues(struct Scsi_Host *shost)
5315{
5316	struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
5317
5318	return blk_mq_pci_map_queues(&shost->tag_set, ctrl_info->pci_dev, 0);
5319}
5320
5321static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info,
5322	void __user *arg)
5323{
5324	struct pci_dev *pci_dev;
5325	u32 subsystem_vendor;
5326	u32 subsystem_device;
5327	cciss_pci_info_struct pciinfo;
5328
5329	if (!arg)
5330		return -EINVAL;
5331
5332	pci_dev = ctrl_info->pci_dev;
5333
5334	pciinfo.domain = pci_domain_nr(pci_dev->bus);
5335	pciinfo.bus = pci_dev->bus->number;
5336	pciinfo.dev_fn = pci_dev->devfn;
5337	subsystem_vendor = pci_dev->subsystem_vendor;
5338	subsystem_device = pci_dev->subsystem_device;
5339	pciinfo.board_id = ((subsystem_device << 16) & 0xffff0000) |
5340		subsystem_vendor;
5341
5342	if (copy_to_user(arg, &pciinfo, sizeof(pciinfo)))
5343		return -EFAULT;
5344
5345	return 0;
5346}
5347
5348static int pqi_getdrivver_ioctl(void __user *arg)
5349{
5350	u32 version;
5351
5352	if (!arg)
5353		return -EINVAL;
5354
5355	version = (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) |
5356		(DRIVER_RELEASE << 16) | DRIVER_REVISION;
5357
5358	if (copy_to_user(arg, &version, sizeof(version)))
5359		return -EFAULT;
5360
5361	return 0;
5362}
5363
5364struct ciss_error_info {
5365	u8	scsi_status;
5366	int	command_status;
5367	size_t	sense_data_length;
5368};
5369
5370static void pqi_error_info_to_ciss(struct pqi_raid_error_info *pqi_error_info,
5371	struct ciss_error_info *ciss_error_info)
5372{
5373	int ciss_cmd_status;
5374	size_t sense_data_length;
5375
5376	switch (pqi_error_info->data_out_result) {
5377	case PQI_DATA_IN_OUT_GOOD:
5378		ciss_cmd_status = CISS_CMD_STATUS_SUCCESS;
5379		break;
5380	case PQI_DATA_IN_OUT_UNDERFLOW:
5381		ciss_cmd_status = CISS_CMD_STATUS_DATA_UNDERRUN;
5382		break;
5383	case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
5384		ciss_cmd_status = CISS_CMD_STATUS_DATA_OVERRUN;
5385		break;
5386	case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
5387	case PQI_DATA_IN_OUT_BUFFER_ERROR:
5388	case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
5389	case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
5390	case PQI_DATA_IN_OUT_ERROR:
5391		ciss_cmd_status = CISS_CMD_STATUS_PROTOCOL_ERROR;
5392		break;
5393	case PQI_DATA_IN_OUT_HARDWARE_ERROR:
5394	case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
5395	case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
5396	case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
5397	case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
5398	case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
5399	case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
5400	case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
5401	case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
5402	case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
5403		ciss_cmd_status = CISS_CMD_STATUS_HARDWARE_ERROR;
5404		break;
5405	case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
5406		ciss_cmd_status = CISS_CMD_STATUS_UNSOLICITED_ABORT;
5407		break;
5408	case PQI_DATA_IN_OUT_ABORTED:
5409		ciss_cmd_status = CISS_CMD_STATUS_ABORTED;
5410		break;
5411	case PQI_DATA_IN_OUT_TIMEOUT:
5412		ciss_cmd_status = CISS_CMD_STATUS_TIMEOUT;
5413		break;
5414	default:
5415		ciss_cmd_status = CISS_CMD_STATUS_TARGET_STATUS;
5416		break;
5417	}
5418
5419	sense_data_length =
5420		get_unaligned_le16(&pqi_error_info->sense_data_length);
5421	if (sense_data_length == 0)
5422		sense_data_length =
5423		get_unaligned_le16(&pqi_error_info->response_data_length);
5424	if (sense_data_length)
5425		if (sense_data_length > sizeof(pqi_error_info->data))
5426			sense_data_length = sizeof(pqi_error_info->data);
5427
5428	ciss_error_info->scsi_status = pqi_error_info->status;
5429	ciss_error_info->command_status = ciss_cmd_status;
5430	ciss_error_info->sense_data_length = sense_data_length;
5431}
5432
5433static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
5434{
5435	int rc;
5436	char *kernel_buffer = NULL;
5437	u16 iu_length;
5438	size_t sense_data_length;
5439	IOCTL_Command_struct iocommand;
5440	struct pqi_raid_path_request request;
5441	struct pqi_raid_error_info pqi_error_info;
5442	struct ciss_error_info ciss_error_info;
5443
5444	if (pqi_ctrl_offline(ctrl_info))
5445		return -ENXIO;
5446	if (!arg)
5447		return -EINVAL;
5448	if (!capable(CAP_SYS_RAWIO))
5449		return -EPERM;
5450	if (copy_from_user(&iocommand, arg, sizeof(iocommand)))
5451		return -EFAULT;
5452	if (iocommand.buf_size < 1 &&
5453		iocommand.Request.Type.Direction != XFER_NONE)
5454		return -EINVAL;
5455	if (iocommand.Request.CDBLen > sizeof(request.cdb))
5456		return -EINVAL;
5457	if (iocommand.Request.Type.Type != TYPE_CMD)
5458		return -EINVAL;
5459
5460	switch (iocommand.Request.Type.Direction) {
5461	case XFER_NONE:
5462	case XFER_WRITE:
5463	case XFER_READ:
5464	case XFER_READ | XFER_WRITE:
5465		break;
5466	default:
5467		return -EINVAL;
5468	}
5469
5470	if (iocommand.buf_size > 0) {
5471		kernel_buffer = kmalloc(iocommand.buf_size, GFP_KERNEL);
5472		if (!kernel_buffer)
5473			return -ENOMEM;
5474		if (iocommand.Request.Type.Direction & XFER_WRITE) {
5475			if (copy_from_user(kernel_buffer, iocommand.buf,
5476				iocommand.buf_size)) {
5477				rc = -EFAULT;
5478				goto out;
5479			}
5480		} else {
5481			memset(kernel_buffer, 0, iocommand.buf_size);
5482		}
5483	}
5484
5485	memset(&request, 0, sizeof(request));
5486
5487	request.header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
5488	iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
5489		PQI_REQUEST_HEADER_LENGTH;
5490	memcpy(request.lun_number, iocommand.LUN_info.LunAddrBytes,
5491		sizeof(request.lun_number));
5492	memcpy(request.cdb, iocommand.Request.CDB, iocommand.Request.CDBLen);
5493	request.additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
5494
5495	switch (iocommand.Request.Type.Direction) {
5496	case XFER_NONE:
5497		request.data_direction = SOP_NO_DIRECTION_FLAG;
5498		break;
5499	case XFER_WRITE:
5500		request.data_direction = SOP_WRITE_FLAG;
5501		break;
5502	case XFER_READ:
5503		request.data_direction = SOP_READ_FLAG;
5504		break;
5505	case XFER_READ | XFER_WRITE:
5506		request.data_direction = SOP_BIDIRECTIONAL;
5507		break;
5508	}
5509
5510	request.task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5511
5512	if (iocommand.buf_size > 0) {
5513		put_unaligned_le32(iocommand.buf_size, &request.buffer_length);
5514
5515		rc = pqi_map_single(ctrl_info->pci_dev,
5516			&request.sg_descriptors[0], kernel_buffer,
5517			iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
5518		if (rc)
5519			goto out;
5520
5521		iu_length += sizeof(request.sg_descriptors[0]);
5522	}
5523
5524	put_unaligned_le16(iu_length, &request.header.iu_length);
5525
5526	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
5527		PQI_SYNC_FLAGS_INTERRUPTABLE, &pqi_error_info, NO_TIMEOUT);
5528
5529	if (iocommand.buf_size > 0)
5530		pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
5531			PCI_DMA_BIDIRECTIONAL);
5532
5533	memset(&iocommand.error_info, 0, sizeof(iocommand.error_info));
5534
5535	if (rc == 0) {
5536		pqi_error_info_to_ciss(&pqi_error_info, &ciss_error_info);
5537		iocommand.error_info.ScsiStatus = ciss_error_info.scsi_status;
5538		iocommand.error_info.CommandStatus =
5539			ciss_error_info.command_status;
5540		sense_data_length = ciss_error_info.sense_data_length;
5541		if (sense_data_length) {
5542			if (sense_data_length >
5543				sizeof(iocommand.error_info.SenseInfo))
5544				sense_data_length =
5545					sizeof(iocommand.error_info.SenseInfo);
5546			memcpy(iocommand.error_info.SenseInfo,
5547				pqi_error_info.data, sense_data_length);
5548			iocommand.error_info.SenseLen = sense_data_length;
5549		}
5550	}
5551
5552	if (copy_to_user(arg, &iocommand, sizeof(iocommand))) {
5553		rc = -EFAULT;
5554		goto out;
5555	}
5556
5557	if (rc == 0 && iocommand.buf_size > 0 &&
5558		(iocommand.Request.Type.Direction & XFER_READ)) {
5559		if (copy_to_user(iocommand.buf, kernel_buffer,
5560			iocommand.buf_size)) {
5561			rc = -EFAULT;
5562		}
5563	}
5564
5565out:
5566	kfree(kernel_buffer);
5567
5568	return rc;
5569}
5570
5571static int pqi_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
5572{
5573	int rc;
5574	struct pqi_ctrl_info *ctrl_info;
5575
5576	ctrl_info = shost_to_hba(sdev->host);
5577
5578	switch (cmd) {
5579	case CCISS_DEREGDISK:
5580	case CCISS_REGNEWDISK:
5581	case CCISS_REGNEWD:
5582		rc = pqi_scan_scsi_devices(ctrl_info);
5583		break;
5584	case CCISS_GETPCIINFO:
5585		rc = pqi_getpciinfo_ioctl(ctrl_info, arg);
5586		break;
5587	case CCISS_GETDRIVVER:
5588		rc = pqi_getdrivver_ioctl(arg);
5589		break;
5590	case CCISS_PASSTHRU:
5591		rc = pqi_passthru_ioctl(ctrl_info, arg);
5592		break;
5593	default:
5594		rc = -EINVAL;
5595		break;
5596	}
5597
5598	return rc;
5599}
5600
5601static ssize_t pqi_version_show(struct device *dev,
5602	struct device_attribute *attr, char *buffer)
5603{
5604	ssize_t count = 0;
5605	struct Scsi_Host *shost;
5606	struct pqi_ctrl_info *ctrl_info;
5607
5608	shost = class_to_shost(dev);
5609	ctrl_info = shost_to_hba(shost);
5610
5611	count += snprintf(buffer + count, PAGE_SIZE - count,
5612		"  driver: %s\n", DRIVER_VERSION BUILD_TIMESTAMP);
5613
5614	count += snprintf(buffer + count, PAGE_SIZE - count,
5615		"firmware: %s\n", ctrl_info->firmware_version);
5616
5617	return count;
5618}
5619
5620static ssize_t pqi_host_rescan_store(struct device *dev,
5621	struct device_attribute *attr, const char *buffer, size_t count)
5622{
5623	struct Scsi_Host *shost = class_to_shost(dev);
5624
5625	pqi_scan_start(shost);
5626
5627	return count;
5628}
5629
5630static ssize_t pqi_lockup_action_show(struct device *dev,
5631	struct device_attribute *attr, char *buffer)
5632{
5633	int count = 0;
5634	unsigned int i;
5635
5636	for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
5637		if (pqi_lockup_actions[i].action == pqi_lockup_action)
5638			count += snprintf(buffer + count, PAGE_SIZE - count,
5639				"[%s] ", pqi_lockup_actions[i].name);
5640		else
5641			count += snprintf(buffer + count, PAGE_SIZE - count,
5642				"%s ", pqi_lockup_actions[i].name);
5643	}
5644
5645	count += snprintf(buffer + count, PAGE_SIZE - count, "\n");
5646
5647	return count;
5648}
5649
5650static ssize_t pqi_lockup_action_store(struct device *dev,
5651	struct device_attribute *attr, const char *buffer, size_t count)
5652{
5653	unsigned int i;
5654	char *action_name;
5655	char action_name_buffer[32];
5656
5657	strlcpy(action_name_buffer, buffer, sizeof(action_name_buffer));
5658	action_name = strstrip(action_name_buffer);
5659
5660	for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
5661		if (strcmp(action_name, pqi_lockup_actions[i].name) == 0) {
5662			pqi_lockup_action = pqi_lockup_actions[i].action;
5663			return count;
5664		}
5665	}
5666
5667	return -EINVAL;
5668}
5669
5670static DEVICE_ATTR(version, 0444, pqi_version_show, NULL);
5671static DEVICE_ATTR(rescan, 0200, NULL, pqi_host_rescan_store);
5672static DEVICE_ATTR(lockup_action, 0644,
5673	pqi_lockup_action_show, pqi_lockup_action_store);
5674
5675static struct device_attribute *pqi_shost_attrs[] = {
5676	&dev_attr_version,
5677	&dev_attr_rescan,
5678	&dev_attr_lockup_action,
5679	NULL
5680};
5681
5682static ssize_t pqi_sas_address_show(struct device *dev,
5683	struct device_attribute *attr, char *buffer)
5684{
5685	struct pqi_ctrl_info *ctrl_info;
5686	struct scsi_device *sdev;
5687	struct pqi_scsi_dev *device;
5688	unsigned long flags;
5689	u64 sas_address;
5690
5691	sdev = to_scsi_device(dev);
5692	ctrl_info = shost_to_hba(sdev->host);
5693
5694	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5695
5696	device = sdev->hostdata;
5697	if (pqi_is_logical_device(device)) {
5698		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
5699			flags);
5700		return -ENODEV;
5701	}
5702	sas_address = device->sas_address;
5703
5704	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5705
5706	return snprintf(buffer, PAGE_SIZE, "0x%016llx\n", sas_address);
5707}
5708
5709static ssize_t pqi_ssd_smart_path_enabled_show(struct device *dev,
5710	struct device_attribute *attr, char *buffer)
5711{
5712	struct pqi_ctrl_info *ctrl_info;
5713	struct scsi_device *sdev;
5714	struct pqi_scsi_dev *device;
5715	unsigned long flags;
5716
5717	sdev = to_scsi_device(dev);
5718	ctrl_info = shost_to_hba(sdev->host);
5719
5720	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5721
5722	device = sdev->hostdata;
5723	buffer[0] = device->raid_bypass_enabled ? '1' : '0';
5724	buffer[1] = '\n';
5725	buffer[2] = '\0';
5726
5727	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5728
5729	return 2;
5730}
5731
5732static ssize_t pqi_raid_level_show(struct device *dev,
5733	struct device_attribute *attr, char *buffer)
5734{
5735	struct pqi_ctrl_info *ctrl_info;
5736	struct scsi_device *sdev;
5737	struct pqi_scsi_dev *device;
5738	unsigned long flags;
5739	char *raid_level;
5740
5741	sdev = to_scsi_device(dev);
5742	ctrl_info = shost_to_hba(sdev->host);
5743
5744	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5745
5746	device = sdev->hostdata;
5747
5748	if (pqi_is_logical_device(device))
5749		raid_level = pqi_raid_level_to_string(device->raid_level);
5750	else
5751		raid_level = "N/A";
5752
5753	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5754
5755	return snprintf(buffer, PAGE_SIZE, "%s\n", raid_level);
5756}
5757
5758static DEVICE_ATTR(sas_address, 0444, pqi_sas_address_show, NULL);
5759static DEVICE_ATTR(ssd_smart_path_enabled, 0444,
5760	pqi_ssd_smart_path_enabled_show, NULL);
5761static DEVICE_ATTR(raid_level, 0444, pqi_raid_level_show, NULL);
5762
5763static struct device_attribute *pqi_sdev_attrs[] = {
5764	&dev_attr_sas_address,
5765	&dev_attr_ssd_smart_path_enabled,
5766	&dev_attr_raid_level,
5767	NULL
5768};
5769
5770static struct scsi_host_template pqi_driver_template = {
5771	.module = THIS_MODULE,
5772	.name = DRIVER_NAME_SHORT,
5773	.proc_name = DRIVER_NAME_SHORT,
5774	.queuecommand = pqi_scsi_queue_command,
5775	.scan_start = pqi_scan_start,
5776	.scan_finished = pqi_scan_finished,
5777	.this_id = -1,
5778	.use_clustering = ENABLE_CLUSTERING,
5779	.eh_device_reset_handler = pqi_eh_device_reset_handler,
5780	.ioctl = pqi_ioctl,
5781	.slave_alloc = pqi_slave_alloc,
5782	.map_queues = pqi_map_queues,
5783	.sdev_attrs = pqi_sdev_attrs,
5784	.shost_attrs = pqi_shost_attrs,
5785};
5786
5787static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info)
5788{
5789	int rc;
5790	struct Scsi_Host *shost;
5791
5792	shost = scsi_host_alloc(&pqi_driver_template, sizeof(ctrl_info));
5793	if (!shost) {
5794		dev_err(&ctrl_info->pci_dev->dev,
5795			"scsi_host_alloc failed for controller %u\n",
5796			ctrl_info->ctrl_id);
5797		return -ENOMEM;
5798	}
5799
5800	shost->io_port = 0;
5801	shost->n_io_port = 0;
5802	shost->this_id = -1;
5803	shost->max_channel = PQI_MAX_BUS;
5804	shost->max_cmd_len = MAX_COMMAND_SIZE;
5805	shost->max_lun = ~0;
5806	shost->max_id = ~0;
5807	shost->max_sectors = ctrl_info->max_sectors;
5808	shost->can_queue = ctrl_info->scsi_ml_can_queue;
5809	shost->cmd_per_lun = shost->can_queue;
5810	shost->sg_tablesize = ctrl_info->sg_tablesize;
5811	shost->transportt = pqi_sas_transport_template;
5812	shost->irq = pci_irq_vector(ctrl_info->pci_dev, 0);
5813	shost->unique_id = shost->irq;
5814	shost->nr_hw_queues = ctrl_info->num_queue_groups;
5815	shost->hostdata[0] = (unsigned long)ctrl_info;
5816
5817	rc = scsi_add_host(shost, &ctrl_info->pci_dev->dev);
5818	if (rc) {
5819		dev_err(&ctrl_info->pci_dev->dev,
5820			"scsi_add_host failed for controller %u\n",
5821			ctrl_info->ctrl_id);
5822		goto free_host;
5823	}
5824
5825	rc = pqi_add_sas_host(shost, ctrl_info);
5826	if (rc) {
5827		dev_err(&ctrl_info->pci_dev->dev,
5828			"add SAS host failed for controller %u\n",
5829			ctrl_info->ctrl_id);
5830		goto remove_host;
5831	}
5832
5833	ctrl_info->scsi_host = shost;
5834
5835	return 0;
5836
5837remove_host:
5838	scsi_remove_host(shost);
5839free_host:
5840	scsi_host_put(shost);
5841
5842	return rc;
5843}
5844
5845static void pqi_unregister_scsi(struct pqi_ctrl_info *ctrl_info)
5846{
5847	struct Scsi_Host *shost;
5848
5849	pqi_delete_sas_host(ctrl_info);
5850
5851	shost = ctrl_info->scsi_host;
5852	if (!shost)
5853		return;
5854
5855	scsi_remove_host(shost);
5856	scsi_host_put(shost);
5857}
5858
5859static int pqi_wait_for_pqi_reset_completion(struct pqi_ctrl_info *ctrl_info)
5860{
5861	int rc = 0;
5862	struct pqi_device_registers __iomem *pqi_registers;
5863	unsigned long timeout;
5864	unsigned int timeout_msecs;
5865	union pqi_reset_register reset_reg;
5866
5867	pqi_registers = ctrl_info->pqi_registers;
5868	timeout_msecs = readw(&pqi_registers->max_reset_timeout) * 100;
5869	timeout = msecs_to_jiffies(timeout_msecs) + jiffies;
5870
5871	while (1) {
5872		msleep(PQI_RESET_POLL_INTERVAL_MSECS);
5873		reset_reg.all_bits = readl(&pqi_registers->device_reset);
5874		if (reset_reg.bits.reset_action == PQI_RESET_ACTION_COMPLETED)
5875			break;
5876		pqi_check_ctrl_health(ctrl_info);
5877		if (pqi_ctrl_offline(ctrl_info)) {
5878			rc = -ENXIO;
5879			break;
5880		}
5881		if (time_after(jiffies, timeout)) {
5882			rc = -ETIMEDOUT;
5883			break;
5884		}
5885	}
5886
5887	return rc;
5888}
5889
5890static int pqi_reset(struct pqi_ctrl_info *ctrl_info)
5891{
5892	int rc;
5893	union pqi_reset_register reset_reg;
5894
5895	if (ctrl_info->pqi_reset_quiesce_supported) {
5896		rc = sis_pqi_reset_quiesce(ctrl_info);
5897		if (rc) {
5898			dev_err(&ctrl_info->pci_dev->dev,
5899				"PQI reset failed during quiesce with error %d\n",
5900				rc);
5901			return rc;
5902		}
5903	}
5904
5905	reset_reg.all_bits = 0;
5906	reset_reg.bits.reset_type = PQI_RESET_TYPE_HARD_RESET;
5907	reset_reg.bits.reset_action = PQI_RESET_ACTION_RESET;
5908
5909	writel(reset_reg.all_bits, &ctrl_info->pqi_registers->device_reset);
5910
5911	rc = pqi_wait_for_pqi_reset_completion(ctrl_info);
5912	if (rc)
5913		dev_err(&ctrl_info->pci_dev->dev,
5914			"PQI reset failed with error %d\n", rc);
5915
5916	return rc;
5917}
5918
5919static int pqi_get_ctrl_firmware_version(struct pqi_ctrl_info *ctrl_info)
5920{
5921	int rc;
5922	struct bmic_identify_controller *identify;
5923
5924	identify = kmalloc(sizeof(*identify), GFP_KERNEL);
5925	if (!identify)
5926		return -ENOMEM;
5927
5928	rc = pqi_identify_controller(ctrl_info, identify);
5929	if (rc)
5930		goto out;
5931
5932	memcpy(ctrl_info->firmware_version, identify->firmware_version,
5933		sizeof(identify->firmware_version));
5934	ctrl_info->firmware_version[sizeof(identify->firmware_version)] = '\0';
5935	snprintf(ctrl_info->firmware_version +
5936		strlen(ctrl_info->firmware_version),
5937		sizeof(ctrl_info->firmware_version),
5938		"-%u", get_unaligned_le16(&identify->firmware_build_number));
5939
5940out:
5941	kfree(identify);
5942
5943	return rc;
5944}
5945
5946static int pqi_process_config_table(struct pqi_ctrl_info *ctrl_info)
5947{
5948	u32 table_length;
5949	u32 section_offset;
5950	void __iomem *table_iomem_addr;
5951	struct pqi_config_table *config_table;
5952	struct pqi_config_table_section_header *section;
5953
5954	table_length = ctrl_info->config_table_length;
5955
5956	config_table = kmalloc(table_length, GFP_KERNEL);
5957	if (!config_table) {
5958		dev_err(&ctrl_info->pci_dev->dev,
5959			"failed to allocate memory for PQI configuration table\n");
5960		return -ENOMEM;
5961	}
5962
5963	/*
5964	 * Copy the config table contents from I/O memory space into the
5965	 * temporary buffer.
5966	 */
5967	table_iomem_addr = ctrl_info->iomem_base +
5968		ctrl_info->config_table_offset;
5969	memcpy_fromio(config_table, table_iomem_addr, table_length);
5970
5971	section_offset =
5972		get_unaligned_le32(&config_table->first_section_offset);
5973
5974	while (section_offset) {
5975		section = (void *)config_table + section_offset;
5976
5977		switch (get_unaligned_le16(&section->section_id)) {
5978		case PQI_CONFIG_TABLE_SECTION_HEARTBEAT:
5979			if (pqi_disable_heartbeat)
5980				dev_warn(&ctrl_info->pci_dev->dev,
5981				"heartbeat disabled by module parameter\n");
5982			else
5983				ctrl_info->heartbeat_counter =
5984					table_iomem_addr +
5985					section_offset +
5986					offsetof(
5987					struct pqi_config_table_heartbeat,
5988						heartbeat_counter);
5989			break;
5990		}
5991
5992		section_offset =
5993			get_unaligned_le16(&section->next_section_offset);
5994	}
5995
5996	kfree(config_table);
5997
5998	return 0;
5999}
6000
6001/* Switches the controller from PQI mode back into SIS mode. */
6002
6003static int pqi_revert_to_sis_mode(struct pqi_ctrl_info *ctrl_info)
6004{
6005	int rc;
6006
6007	pqi_change_irq_mode(ctrl_info, IRQ_MODE_NONE);
6008	rc = pqi_reset(ctrl_info);
6009	if (rc)
6010		return rc;
6011	rc = sis_reenable_sis_mode(ctrl_info);
6012	if (rc) {
6013		dev_err(&ctrl_info->pci_dev->dev,
6014			"re-enabling SIS mode failed with error %d\n", rc);
6015		return rc;
6016	}
6017	pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
6018
6019	return 0;
6020}
6021
6022/*
6023 * If the controller isn't already in SIS mode, this function forces it into
6024 * SIS mode.
6025 */
6026
6027static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info)
6028{
6029	if (!sis_is_firmware_running(ctrl_info))
6030		return -ENXIO;
6031
6032	if (pqi_get_ctrl_mode(ctrl_info) == SIS_MODE)
6033		return 0;
6034
6035	if (sis_is_kernel_up(ctrl_info)) {
6036		pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
6037		return 0;
6038	}
6039
6040	return pqi_revert_to_sis_mode(ctrl_info);
6041}
6042
6043static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
6044{
6045	int rc;
6046
6047	rc = pqi_force_sis_mode(ctrl_info);
6048	if (rc)
6049		return rc;
6050
6051	/*
6052	 * Wait until the controller is ready to start accepting SIS
6053	 * commands.
6054	 */
6055	rc = sis_wait_for_ctrl_ready(ctrl_info);
6056	if (rc)
6057		return rc;
6058
6059	/*
6060	 * Get the controller properties.  This allows us to determine
6061	 * whether or not it supports PQI mode.
6062	 */
6063	rc = sis_get_ctrl_properties(ctrl_info);
6064	if (rc) {
6065		dev_err(&ctrl_info->pci_dev->dev,
6066			"error obtaining controller properties\n");
6067		return rc;
6068	}
6069
6070	rc = sis_get_pqi_capabilities(ctrl_info);
6071	if (rc) {
6072		dev_err(&ctrl_info->pci_dev->dev,
6073			"error obtaining controller capabilities\n");
6074		return rc;
6075	}
6076
6077	if (reset_devices) {
6078		if (ctrl_info->max_outstanding_requests >
6079			PQI_MAX_OUTSTANDING_REQUESTS_KDUMP)
6080			ctrl_info->max_outstanding_requests =
6081					PQI_MAX_OUTSTANDING_REQUESTS_KDUMP;
6082	} else {
6083		if (ctrl_info->max_outstanding_requests >
6084			PQI_MAX_OUTSTANDING_REQUESTS)
6085			ctrl_info->max_outstanding_requests =
6086					PQI_MAX_OUTSTANDING_REQUESTS;
6087	}
6088
6089	pqi_calculate_io_resources(ctrl_info);
6090
6091	rc = pqi_alloc_error_buffer(ctrl_info);
6092	if (rc) {
6093		dev_err(&ctrl_info->pci_dev->dev,
6094			"failed to allocate PQI error buffer\n");
6095		return rc;
6096	}
6097
6098	/*
6099	 * If the function we are about to call succeeds, the
6100	 * controller will transition from legacy SIS mode
6101	 * into PQI mode.
6102	 */
6103	rc = sis_init_base_struct_addr(ctrl_info);
6104	if (rc) {
6105		dev_err(&ctrl_info->pci_dev->dev,
6106			"error initializing PQI mode\n");
6107		return rc;
6108	}
6109
6110	/* Wait for the controller to complete the SIS -> PQI transition. */
6111	rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
6112	if (rc) {
6113		dev_err(&ctrl_info->pci_dev->dev,
6114			"transition to PQI mode failed\n");
6115		return rc;
6116	}
6117
6118	/* From here on, we are running in PQI mode. */
6119	ctrl_info->pqi_mode_enabled = true;
6120	pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
6121
6122	rc = pqi_process_config_table(ctrl_info);
6123	if (rc)
6124		return rc;
6125
6126	rc = pqi_alloc_admin_queues(ctrl_info);
6127	if (rc) {
6128		dev_err(&ctrl_info->pci_dev->dev,
6129			"failed to allocate admin queues\n");
6130		return rc;
6131	}
6132
6133	rc = pqi_create_admin_queues(ctrl_info);
6134	if (rc) {
6135		dev_err(&ctrl_info->pci_dev->dev,
6136			"error creating admin queues\n");
6137		return rc;
6138	}
6139
6140	rc = pqi_report_device_capability(ctrl_info);
6141	if (rc) {
6142		dev_err(&ctrl_info->pci_dev->dev,
6143			"obtaining device capability failed\n");
6144		return rc;
6145	}
6146
6147	rc = pqi_validate_device_capability(ctrl_info);
6148	if (rc)
6149		return rc;
6150
6151	pqi_calculate_queue_resources(ctrl_info);
6152
6153	rc = pqi_enable_msix_interrupts(ctrl_info);
6154	if (rc)
6155		return rc;
6156
6157	if (ctrl_info->num_msix_vectors_enabled < ctrl_info->num_queue_groups) {
6158		ctrl_info->max_msix_vectors =
6159			ctrl_info->num_msix_vectors_enabled;
6160		pqi_calculate_queue_resources(ctrl_info);
6161	}
6162
6163	rc = pqi_alloc_io_resources(ctrl_info);
6164	if (rc)
6165		return rc;
6166
6167	rc = pqi_alloc_operational_queues(ctrl_info);
6168	if (rc) {
6169		dev_err(&ctrl_info->pci_dev->dev,
6170			"failed to allocate operational queues\n");
6171		return rc;
6172	}
6173
6174	pqi_init_operational_queues(ctrl_info);
6175
6176	rc = pqi_request_irqs(ctrl_info);
6177	if (rc)
6178		return rc;
6179
6180	rc = pqi_create_queues(ctrl_info);
6181	if (rc)
6182		return rc;
6183
6184	pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
6185
6186	ctrl_info->controller_online = true;
6187	pqi_start_heartbeat_timer(ctrl_info);
6188
6189	rc = pqi_enable_events(ctrl_info);
6190	if (rc) {
6191		dev_err(&ctrl_info->pci_dev->dev,
6192			"error enabling events\n");
6193		return rc;
6194	}
6195
6196	/* Register with the SCSI subsystem. */
6197	rc = pqi_register_scsi(ctrl_info);
6198	if (rc)
6199		return rc;
6200
6201	rc = pqi_get_ctrl_firmware_version(ctrl_info);
6202	if (rc) {
6203		dev_err(&ctrl_info->pci_dev->dev,
6204			"error obtaining firmware version\n");
6205		return rc;
6206	}
6207
6208	rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
6209	if (rc) {
6210		dev_err(&ctrl_info->pci_dev->dev,
6211			"error updating host wellness\n");
6212		return rc;
6213	}
6214
6215	pqi_schedule_update_time_worker(ctrl_info);
6216
6217	pqi_scan_scsi_devices(ctrl_info);
6218
6219	return 0;
6220}
6221
6222static void pqi_reinit_queues(struct pqi_ctrl_info *ctrl_info)
6223{
6224	unsigned int i;
6225	struct pqi_admin_queues *admin_queues;
6226	struct pqi_event_queue *event_queue;
6227
6228	admin_queues = &ctrl_info->admin_queues;
6229	admin_queues->iq_pi_copy = 0;
6230	admin_queues->oq_ci_copy = 0;
6231	*admin_queues->oq_pi = 0;
6232
6233	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
6234		ctrl_info->queue_groups[i].iq_pi_copy[RAID_PATH] = 0;
6235		ctrl_info->queue_groups[i].iq_pi_copy[AIO_PATH] = 0;
6236		ctrl_info->queue_groups[i].oq_ci_copy = 0;
6237
6238		*ctrl_info->queue_groups[i].iq_ci[RAID_PATH] = 0;
6239		*ctrl_info->queue_groups[i].iq_ci[AIO_PATH] = 0;
6240		*ctrl_info->queue_groups[i].oq_pi = 0;
6241	}
6242
6243	event_queue = &ctrl_info->event_queue;
6244	*event_queue->oq_pi = 0;
6245	event_queue->oq_ci_copy = 0;
6246}
6247
6248static int pqi_ctrl_init_resume(struct pqi_ctrl_info *ctrl_info)
6249{
6250	int rc;
6251
6252	rc = pqi_force_sis_mode(ctrl_info);
6253	if (rc)
6254		return rc;
6255
6256	/*
6257	 * Wait until the controller is ready to start accepting SIS
6258	 * commands.
6259	 */
6260	rc = sis_wait_for_ctrl_ready_resume(ctrl_info);
6261	if (rc)
6262		return rc;
6263
6264	/*
6265	 * If the function we are about to call succeeds, the
6266	 * controller will transition from legacy SIS mode
6267	 * into PQI mode.
6268	 */
6269	rc = sis_init_base_struct_addr(ctrl_info);
6270	if (rc) {
6271		dev_err(&ctrl_info->pci_dev->dev,
6272			"error initializing PQI mode\n");
6273		return rc;
6274	}
6275
6276	/* Wait for the controller to complete the SIS -> PQI transition. */
6277	rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
6278	if (rc) {
6279		dev_err(&ctrl_info->pci_dev->dev,
6280			"transition to PQI mode failed\n");
6281		return rc;
6282	}
6283
6284	/* From here on, we are running in PQI mode. */
6285	ctrl_info->pqi_mode_enabled = true;
6286	pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
6287
6288	pqi_reinit_queues(ctrl_info);
6289
6290	rc = pqi_create_admin_queues(ctrl_info);
6291	if (rc) {
6292		dev_err(&ctrl_info->pci_dev->dev,
6293			"error creating admin queues\n");
6294		return rc;
6295	}
6296
6297	rc = pqi_create_queues(ctrl_info);
6298	if (rc)
6299		return rc;
6300
6301	pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
6302
6303	ctrl_info->controller_online = true;
6304	pqi_start_heartbeat_timer(ctrl_info);
6305	pqi_ctrl_unblock_requests(ctrl_info);
6306
6307	rc = pqi_enable_events(ctrl_info);
6308	if (rc) {
6309		dev_err(&ctrl_info->pci_dev->dev,
6310			"error enabling events\n");
6311		return rc;
6312	}
6313
6314	rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
6315	if (rc) {
6316		dev_err(&ctrl_info->pci_dev->dev,
6317			"error updating host wellness\n");
6318		return rc;
6319	}
6320
6321	pqi_schedule_update_time_worker(ctrl_info);
6322
6323	pqi_scan_scsi_devices(ctrl_info);
6324
6325	return 0;
6326}
6327
6328static inline int pqi_set_pcie_completion_timeout(struct pci_dev *pci_dev,
6329	u16 timeout)
6330{
6331	return pcie_capability_clear_and_set_word(pci_dev, PCI_EXP_DEVCTL2,
6332		PCI_EXP_DEVCTL2_COMP_TIMEOUT, timeout);
6333}
6334
6335static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info)
6336{
6337	int rc;
6338	u64 mask;
6339
6340	rc = pci_enable_device(ctrl_info->pci_dev);
6341	if (rc) {
6342		dev_err(&ctrl_info->pci_dev->dev,
6343			"failed to enable PCI device\n");
6344		return rc;
6345	}
6346
6347	if (sizeof(dma_addr_t) > 4)
6348		mask = DMA_BIT_MASK(64);
6349	else
6350		mask = DMA_BIT_MASK(32);
6351
6352	rc = dma_set_mask(&ctrl_info->pci_dev->dev, mask);
6353	if (rc) {
6354		dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n");
6355		goto disable_device;
6356	}
6357
6358	rc = pci_request_regions(ctrl_info->pci_dev, DRIVER_NAME_SHORT);
6359	if (rc) {
6360		dev_err(&ctrl_info->pci_dev->dev,
6361			"failed to obtain PCI resources\n");
6362		goto disable_device;
6363	}
6364
6365	ctrl_info->iomem_base = ioremap_nocache(pci_resource_start(
6366		ctrl_info->pci_dev, 0),
6367		sizeof(struct pqi_ctrl_registers));
6368	if (!ctrl_info->iomem_base) {
6369		dev_err(&ctrl_info->pci_dev->dev,
6370			"failed to map memory for controller registers\n");
6371		rc = -ENOMEM;
6372		goto release_regions;
6373	}
6374
6375#define PCI_EXP_COMP_TIMEOUT_65_TO_210_MS		0x6
6376
6377	/* Increase the PCIe completion timeout. */
6378	rc = pqi_set_pcie_completion_timeout(ctrl_info->pci_dev,
6379		PCI_EXP_COMP_TIMEOUT_65_TO_210_MS);
6380	if (rc) {
6381		dev_err(&ctrl_info->pci_dev->dev,
6382			"failed to set PCIe completion timeout\n");
6383		goto release_regions;
6384	}
6385
6386	/* Enable bus mastering. */
6387	pci_set_master(ctrl_info->pci_dev);
6388
6389	ctrl_info->registers = ctrl_info->iomem_base;
6390	ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers;
6391
6392	pci_set_drvdata(ctrl_info->pci_dev, ctrl_info);
6393
6394	return 0;
6395
6396release_regions:
6397	pci_release_regions(ctrl_info->pci_dev);
6398disable_device:
6399	pci_disable_device(ctrl_info->pci_dev);
6400
6401	return rc;
6402}
6403
6404static void pqi_cleanup_pci_init(struct pqi_ctrl_info *ctrl_info)
6405{
6406	iounmap(ctrl_info->iomem_base);
6407	pci_release_regions(ctrl_info->pci_dev);
6408	if (pci_is_enabled(ctrl_info->pci_dev))
6409		pci_disable_device(ctrl_info->pci_dev);
6410	pci_set_drvdata(ctrl_info->pci_dev, NULL);
6411}
6412
6413static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node)
6414{
6415	struct pqi_ctrl_info *ctrl_info;
6416
6417	ctrl_info = kzalloc_node(sizeof(struct pqi_ctrl_info),
6418			GFP_KERNEL, numa_node);
6419	if (!ctrl_info)
6420		return NULL;
6421
6422	mutex_init(&ctrl_info->scan_mutex);
6423	mutex_init(&ctrl_info->lun_reset_mutex);
6424
6425	INIT_LIST_HEAD(&ctrl_info->scsi_device_list);
6426	spin_lock_init(&ctrl_info->scsi_device_list_lock);
6427
6428	INIT_WORK(&ctrl_info->event_work, pqi_event_worker);
6429	atomic_set(&ctrl_info->num_interrupts, 0);
6430
6431	INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
6432	INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
6433
6434	timer_setup(&ctrl_info->heartbeat_timer, pqi_heartbeat_timer_handler, 0);
6435	INIT_WORK(&ctrl_info->ctrl_offline_work, pqi_ctrl_offline_worker);
6436
6437	sema_init(&ctrl_info->sync_request_sem,
6438		PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
6439	init_waitqueue_head(&ctrl_info->block_requests_wait);
6440
6441	INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
6442	spin_lock_init(&ctrl_info->raid_bypass_retry_list_lock);
6443	INIT_WORK(&ctrl_info->raid_bypass_retry_work,
6444		pqi_raid_bypass_retry_worker);
6445
6446	ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1;
6447	ctrl_info->irq_mode = IRQ_MODE_NONE;
6448	ctrl_info->max_msix_vectors = PQI_MAX_MSIX_VECTORS;
6449
6450	return ctrl_info;
6451}
6452
6453static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info)
6454{
6455	kfree(ctrl_info);
6456}
6457
6458static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
6459{
6460	pqi_free_irqs(ctrl_info);
6461	pqi_disable_msix_interrupts(ctrl_info);
6462}
6463
6464static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)
6465{
6466	pqi_stop_heartbeat_timer(ctrl_info);
6467	pqi_free_interrupts(ctrl_info);
6468	if (ctrl_info->queue_memory_base)
6469		dma_free_coherent(&ctrl_info->pci_dev->dev,
6470			ctrl_info->queue_memory_length,
6471			ctrl_info->queue_memory_base,
6472			ctrl_info->queue_memory_base_dma_handle);
6473	if (ctrl_info->admin_queue_memory_base)
6474		dma_free_coherent(&ctrl_info->pci_dev->dev,
6475			ctrl_info->admin_queue_memory_length,
6476			ctrl_info->admin_queue_memory_base,
6477			ctrl_info->admin_queue_memory_base_dma_handle);
6478	pqi_free_all_io_requests(ctrl_info);
6479	if (ctrl_info->error_buffer)
6480		dma_free_coherent(&ctrl_info->pci_dev->dev,
6481			ctrl_info->error_buffer_length,
6482			ctrl_info->error_buffer,
6483			ctrl_info->error_buffer_dma_handle);
6484	if (ctrl_info->iomem_base)
6485		pqi_cleanup_pci_init(ctrl_info);
6486	pqi_free_ctrl_info(ctrl_info);
6487}
6488
6489static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info)
6490{
6491	pqi_cancel_rescan_worker(ctrl_info);
6492	pqi_cancel_update_time_worker(ctrl_info);
6493	pqi_remove_all_scsi_devices(ctrl_info);
6494	pqi_unregister_scsi(ctrl_info);
6495	if (ctrl_info->pqi_mode_enabled)
6496		pqi_revert_to_sis_mode(ctrl_info);
6497	pqi_free_ctrl_resources(ctrl_info);
6498}
6499
6500static void pqi_perform_lockup_action(void)
6501{
6502	switch (pqi_lockup_action) {
6503	case PANIC:
6504		panic("FATAL: Smart Family Controller lockup detected");
6505		break;
6506	case REBOOT:
6507		emergency_restart();
6508		break;
6509	case NONE:
6510	default:
6511		break;
6512	}
6513}
6514
6515static struct pqi_raid_error_info pqi_ctrl_offline_raid_error_info = {
6516	.data_out_result = PQI_DATA_IN_OUT_HARDWARE_ERROR,
6517	.status = SAM_STAT_CHECK_CONDITION,
6518};
6519
6520static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info)
6521{
6522	unsigned int i;
6523	struct pqi_io_request *io_request;
6524	struct scsi_cmnd *scmd;
6525
6526	for (i = 0; i < ctrl_info->max_io_slots; i++) {
6527		io_request = &ctrl_info->io_request_pool[i];
6528		if (atomic_read(&io_request->refcount) == 0)
6529			continue;
6530
6531		scmd = io_request->scmd;
6532		if (scmd) {
6533			set_host_byte(scmd, DID_NO_CONNECT);
6534		} else {
6535			io_request->status = -ENXIO;
6536			io_request->error_info =
6537				&pqi_ctrl_offline_raid_error_info;
6538		}
6539
6540		io_request->io_complete_callback(io_request,
6541			io_request->context);
6542	}
6543}
6544
6545static void pqi_take_ctrl_offline_deferred(struct pqi_ctrl_info *ctrl_info)
6546{
6547	pqi_perform_lockup_action();
6548	pqi_stop_heartbeat_timer(ctrl_info);
6549	pqi_free_interrupts(ctrl_info);
6550	pqi_cancel_rescan_worker(ctrl_info);
6551	pqi_cancel_update_time_worker(ctrl_info);
6552	pqi_ctrl_wait_until_quiesced(ctrl_info);
6553	pqi_fail_all_outstanding_requests(ctrl_info);
6554	pqi_clear_all_queued_raid_bypass_retries(ctrl_info);
6555	pqi_ctrl_unblock_requests(ctrl_info);
6556}
6557
6558static void pqi_ctrl_offline_worker(struct work_struct *work)
6559{
6560	struct pqi_ctrl_info *ctrl_info;
6561
6562	ctrl_info = container_of(work, struct pqi_ctrl_info, ctrl_offline_work);
6563	pqi_take_ctrl_offline_deferred(ctrl_info);
6564}
6565
6566static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
6567{
6568	if (!ctrl_info->controller_online)
6569		return;
6570
6571	ctrl_info->controller_online = false;
6572	ctrl_info->pqi_mode_enabled = false;
6573	pqi_ctrl_block_requests(ctrl_info);
6574	if (!pqi_disable_ctrl_shutdown)
6575		sis_shutdown_ctrl(ctrl_info);
6576	pci_disable_device(ctrl_info->pci_dev);
6577	dev_err(&ctrl_info->pci_dev->dev, "controller offline\n");
6578	schedule_work(&ctrl_info->ctrl_offline_work);
6579}
6580
6581static void pqi_print_ctrl_info(struct pci_dev *pci_dev,
6582	const struct pci_device_id *id)
6583{
6584	char *ctrl_description;
6585
6586	if (id->driver_data)
6587		ctrl_description = (char *)id->driver_data;
6588	else
6589		ctrl_description = "Microsemi Smart Family Controller";
6590
6591	dev_info(&pci_dev->dev, "%s found\n", ctrl_description);
6592}
6593
6594static int pqi_pci_probe(struct pci_dev *pci_dev,
6595	const struct pci_device_id *id)
6596{
6597	int rc;
6598	int node;
6599	struct pqi_ctrl_info *ctrl_info;
6600
6601	pqi_print_ctrl_info(pci_dev, id);
6602
6603	if (pqi_disable_device_id_wildcards &&
6604		id->subvendor == PCI_ANY_ID &&
6605		id->subdevice == PCI_ANY_ID) {
6606		dev_warn(&pci_dev->dev,
6607			"controller not probed because device ID wildcards are disabled\n");
6608		return -ENODEV;
6609	}
6610
6611	if (id->subvendor == PCI_ANY_ID || id->subdevice == PCI_ANY_ID)
6612		dev_warn(&pci_dev->dev,
6613			"controller device ID matched using wildcards\n");
6614
6615	node = dev_to_node(&pci_dev->dev);
6616	if (node == NUMA_NO_NODE)
6617		set_dev_node(&pci_dev->dev, 0);
6618
6619	ctrl_info = pqi_alloc_ctrl_info(node);
6620	if (!ctrl_info) {
6621		dev_err(&pci_dev->dev,
6622			"failed to allocate controller info block\n");
6623		return -ENOMEM;
6624	}
6625
6626	ctrl_info->pci_dev = pci_dev;
6627
6628	rc = pqi_pci_init(ctrl_info);
6629	if (rc)
6630		goto error;
6631
6632	rc = pqi_ctrl_init(ctrl_info);
6633	if (rc)
6634		goto error;
6635
6636	return 0;
6637
6638error:
6639	pqi_remove_ctrl(ctrl_info);
6640
6641	return rc;
6642}
6643
6644static void pqi_pci_remove(struct pci_dev *pci_dev)
6645{
6646	struct pqi_ctrl_info *ctrl_info;
6647
6648	ctrl_info = pci_get_drvdata(pci_dev);
6649	if (!ctrl_info)
6650		return;
6651
6652	pqi_remove_ctrl(ctrl_info);
6653}
6654
6655static void pqi_shutdown(struct pci_dev *pci_dev)
6656{
6657	int rc;
6658	struct pqi_ctrl_info *ctrl_info;
6659
6660	ctrl_info = pci_get_drvdata(pci_dev);
6661	if (!ctrl_info)
6662		goto error;
6663
6664	/*
6665	 * Write all data in the controller's battery-backed cache to
6666	 * storage.
6667	 */
6668	rc = pqi_flush_cache(ctrl_info, SHUTDOWN);
6669	pqi_reset(ctrl_info);
6670	if (rc == 0)
6671		return;
6672
6673error:
6674	dev_warn(&pci_dev->dev,
6675		"unable to flush controller cache\n");
6676}
6677
6678static void pqi_process_lockup_action_param(void)
6679{
6680	unsigned int i;
6681
6682	if (!pqi_lockup_action_param)
6683		return;
6684
6685	for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6686		if (strcmp(pqi_lockup_action_param,
6687			pqi_lockup_actions[i].name) == 0) {
6688			pqi_lockup_action = pqi_lockup_actions[i].action;
6689			return;
6690		}
6691	}
6692
6693	pr_warn("%s: invalid lockup action setting \"%s\" - supported settings: none, reboot, panic\n",
6694		DRIVER_NAME_SHORT, pqi_lockup_action_param);
6695}
6696
6697static void pqi_process_module_params(void)
6698{
6699	pqi_process_lockup_action_param();
6700}
6701
6702static __maybe_unused int pqi_suspend(struct pci_dev *pci_dev, pm_message_t state)
6703{
6704	struct pqi_ctrl_info *ctrl_info;
6705
6706	ctrl_info = pci_get_drvdata(pci_dev);
6707
6708	pqi_disable_events(ctrl_info);
6709	pqi_cancel_update_time_worker(ctrl_info);
6710	pqi_cancel_rescan_worker(ctrl_info);
6711	pqi_wait_until_scan_finished(ctrl_info);
6712	pqi_wait_until_lun_reset_finished(ctrl_info);
6713	pqi_flush_cache(ctrl_info, SUSPEND);
6714	pqi_ctrl_block_requests(ctrl_info);
6715	pqi_ctrl_wait_until_quiesced(ctrl_info);
6716	pqi_wait_until_inbound_queues_empty(ctrl_info);
6717	pqi_ctrl_wait_for_pending_io(ctrl_info);
6718	pqi_stop_heartbeat_timer(ctrl_info);
6719
6720	if (state.event == PM_EVENT_FREEZE)
6721		return 0;
6722
6723	pci_save_state(pci_dev);
6724	pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
6725
6726	ctrl_info->controller_online = false;
6727	ctrl_info->pqi_mode_enabled = false;
6728
6729	return 0;
6730}
6731
6732static __maybe_unused int pqi_resume(struct pci_dev *pci_dev)
6733{
6734	int rc;
6735	struct pqi_ctrl_info *ctrl_info;
6736
6737	ctrl_info = pci_get_drvdata(pci_dev);
6738
6739	if (pci_dev->current_state != PCI_D0) {
6740		ctrl_info->max_hw_queue_index = 0;
6741		pqi_free_interrupts(ctrl_info);
6742		pqi_change_irq_mode(ctrl_info, IRQ_MODE_INTX);
6743		rc = request_irq(pci_irq_vector(pci_dev, 0), pqi_irq_handler,
6744			IRQF_SHARED, DRIVER_NAME_SHORT,
6745			&ctrl_info->queue_groups[0]);
6746		if (rc) {
6747			dev_err(&ctrl_info->pci_dev->dev,
6748				"irq %u init failed with error %d\n",
6749				pci_dev->irq, rc);
6750			return rc;
6751		}
6752		pqi_start_heartbeat_timer(ctrl_info);
6753		pqi_ctrl_unblock_requests(ctrl_info);
6754		return 0;
6755	}
6756
6757	pci_set_power_state(pci_dev, PCI_D0);
6758	pci_restore_state(pci_dev);
6759
6760	return pqi_ctrl_init_resume(ctrl_info);
6761}
6762
6763/* Define the PCI IDs for the controllers that we support. */
6764static const struct pci_device_id pqi_pci_id_table[] = {
6765	{
6766		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6767			       0x105b, 0x1211)
6768	},
6769	{
6770		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6771			       0x105b, 0x1321)
6772	},
6773	{
6774		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6775			       0x152d, 0x8a22)
6776	},
6777	{
6778		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6779			       0x152d, 0x8a23)
6780	},
6781	{
6782		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6783			       0x152d, 0x8a24)
6784	},
6785	{
6786		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6787			       0x152d, 0x8a36)
6788	},
6789	{
6790		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6791			       0x152d, 0x8a37)
6792	},
6793	{
6794		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6795			       0x193d, 0x8460)
6796	},
6797	{
6798		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6799			       0x193d, 0x8461)
6800	},
6801	{
6802		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6803			       0x193d, 0xf460)
6804	},
6805	{
6806		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6807			       0x193d, 0xf461)
6808	},
6809	{
6810		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6811			       0x1bd4, 0x0045)
6812	},
6813	{
6814		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6815			       0x1bd4, 0x0046)
6816	},
6817	{
6818		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6819			       0x1bd4, 0x0047)
6820	},
6821	{
6822		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6823			       0x1bd4, 0x0048)
6824	},
6825	{
6826		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6827			       PCI_VENDOR_ID_ADAPTEC2, 0x0110)
6828	},
6829	{
6830		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6831			       PCI_VENDOR_ID_ADAPTEC2, 0x0608)
6832	},
6833	{
6834		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6835			       PCI_VENDOR_ID_ADAPTEC2, 0x0800)
6836	},
6837	{
6838		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6839			       PCI_VENDOR_ID_ADAPTEC2, 0x0801)
6840	},
6841	{
6842		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6843			       PCI_VENDOR_ID_ADAPTEC2, 0x0802)
6844	},
6845	{
6846		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6847			       PCI_VENDOR_ID_ADAPTEC2, 0x0803)
6848	},
6849	{
6850		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6851			       PCI_VENDOR_ID_ADAPTEC2, 0x0804)
6852	},
6853	{
6854		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6855			       PCI_VENDOR_ID_ADAPTEC2, 0x0805)
6856	},
6857	{
6858		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6859			       PCI_VENDOR_ID_ADAPTEC2, 0x0806)
6860	},
6861	{
6862		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6863			       PCI_VENDOR_ID_ADAPTEC2, 0x0807)
6864	},
6865	{
6866		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6867			       PCI_VENDOR_ID_ADAPTEC2, 0x0900)
6868	},
6869	{
6870		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6871			       PCI_VENDOR_ID_ADAPTEC2, 0x0901)
6872	},
6873	{
6874		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6875			       PCI_VENDOR_ID_ADAPTEC2, 0x0902)
6876	},
6877	{
6878		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6879			       PCI_VENDOR_ID_ADAPTEC2, 0x0903)
6880	},
6881	{
6882		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6883			       PCI_VENDOR_ID_ADAPTEC2, 0x0904)
6884	},
6885	{
6886		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6887			       PCI_VENDOR_ID_ADAPTEC2, 0x0905)
6888	},
6889	{
6890		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6891			       PCI_VENDOR_ID_ADAPTEC2, 0x0906)
6892	},
6893	{
6894		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6895			       PCI_VENDOR_ID_ADAPTEC2, 0x0907)
6896	},
6897	{
6898		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6899			       PCI_VENDOR_ID_ADAPTEC2, 0x0908)
6900	},
6901	{
6902		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6903			       PCI_VENDOR_ID_ADAPTEC2, 0x090a)
6904	},
6905	{
6906		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6907			       PCI_VENDOR_ID_ADAPTEC2, 0x1200)
6908	},
6909	{
6910		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6911			       PCI_VENDOR_ID_ADAPTEC2, 0x1201)
6912	},
6913	{
6914		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6915			       PCI_VENDOR_ID_ADAPTEC2, 0x1202)
6916	},
6917	{
6918		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6919			       PCI_VENDOR_ID_ADAPTEC2, 0x1280)
6920	},
6921	{
6922		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6923			       PCI_VENDOR_ID_ADAPTEC2, 0x1281)
6924	},
6925	{
6926		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6927			       PCI_VENDOR_ID_ADAPTEC2, 0x1282)
6928	},
6929	{
6930		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6931			       PCI_VENDOR_ID_ADAPTEC2, 0x1300)
6932	},
6933	{
6934		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6935			       PCI_VENDOR_ID_ADAPTEC2, 0x1301)
6936	},
6937	{
6938		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6939			       PCI_VENDOR_ID_ADAPTEC2, 0x1302)
6940	},
6941	{
6942		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6943			       PCI_VENDOR_ID_ADAPTEC2, 0x1303)
6944	},
6945	{
6946		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6947			       PCI_VENDOR_ID_ADAPTEC2, 0x1380)
6948	},
6949	{
6950		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6951			       PCI_VENDOR_ID_DELL, 0x1fe0)
6952	},
6953	{
6954		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6955			       PCI_VENDOR_ID_HP, 0x0600)
6956	},
6957	{
6958		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6959			       PCI_VENDOR_ID_HP, 0x0601)
6960	},
6961	{
6962		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6963			       PCI_VENDOR_ID_HP, 0x0602)
6964	},
6965	{
6966		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6967			       PCI_VENDOR_ID_HP, 0x0603)
6968	},
6969	{
6970		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6971			       PCI_VENDOR_ID_HP, 0x0609)
6972	},
6973	{
6974		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6975			       PCI_VENDOR_ID_HP, 0x0650)
6976	},
6977	{
6978		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6979			       PCI_VENDOR_ID_HP, 0x0651)
6980	},
6981	{
6982		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6983			       PCI_VENDOR_ID_HP, 0x0652)
6984	},
6985	{
6986		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6987			       PCI_VENDOR_ID_HP, 0x0653)
6988	},
6989	{
6990		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6991			       PCI_VENDOR_ID_HP, 0x0654)
6992	},
6993	{
6994		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6995			       PCI_VENDOR_ID_HP, 0x0655)
6996	},
6997	{
6998		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
6999			       PCI_VENDOR_ID_HP, 0x0700)
7000	},
7001	{
7002		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7003			       PCI_VENDOR_ID_HP, 0x0701)
7004	},
7005	{
7006		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7007			       PCI_VENDOR_ID_HP, 0x1001)
7008	},
7009	{
7010		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7011			       PCI_VENDOR_ID_HP, 0x1100)
7012	},
7013	{
7014		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7015			       PCI_VENDOR_ID_HP, 0x1101)
7016	},
7017	{
7018		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
7019			       PCI_ANY_ID, PCI_ANY_ID)
7020	},
7021	{ 0 }
7022};
7023
7024MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
7025
7026static struct pci_driver pqi_pci_driver = {
7027	.name = DRIVER_NAME_SHORT,
7028	.id_table = pqi_pci_id_table,
7029	.probe = pqi_pci_probe,
7030	.remove = pqi_pci_remove,
7031	.shutdown = pqi_shutdown,
7032#if defined(CONFIG_PM)
7033	.suspend = pqi_suspend,
7034	.resume = pqi_resume,
7035#endif
7036};
7037
7038static int __init pqi_init(void)
7039{
7040	int rc;
7041
7042	pr_info(DRIVER_NAME "\n");
7043
7044	pqi_sas_transport_template =
7045		sas_attach_transport(&pqi_sas_transport_functions);
7046	if (!pqi_sas_transport_template)
7047		return -ENODEV;
7048
7049	pqi_process_module_params();
7050
7051	rc = pci_register_driver(&pqi_pci_driver);
7052	if (rc)
7053		sas_release_transport(pqi_sas_transport_template);
7054
7055	return rc;
7056}
7057
7058static void __exit pqi_cleanup(void)
7059{
7060	pci_unregister_driver(&pqi_pci_driver);
7061	sas_release_transport(pqi_sas_transport_template);
7062}
7063
7064module_init(pqi_init);
7065module_exit(pqi_cleanup);
7066
7067static void __attribute__((unused)) verify_structures(void)
7068{
7069	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7070		sis_host_to_ctrl_doorbell) != 0x20);
7071	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7072		sis_interrupt_mask) != 0x34);
7073	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7074		sis_ctrl_to_host_doorbell) != 0x9c);
7075	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7076		sis_ctrl_to_host_doorbell_clear) != 0xa0);
7077	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7078		sis_driver_scratch) != 0xb0);
7079	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7080		sis_firmware_status) != 0xbc);
7081	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7082		sis_mailbox) != 0x1000);
7083	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
7084		pqi_registers) != 0x4000);
7085
7086	BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7087		iu_type) != 0x0);
7088	BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7089		iu_length) != 0x2);
7090	BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7091		response_queue_id) != 0x4);
7092	BUILD_BUG_ON(offsetof(struct pqi_iu_header,
7093		work_area) != 0x6);
7094	BUILD_BUG_ON(sizeof(struct pqi_iu_header) != 0x8);
7095
7096	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7097		status) != 0x0);
7098	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7099		service_response) != 0x1);
7100	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7101		data_present) != 0x2);
7102	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7103		reserved) != 0x3);
7104	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7105		residual_count) != 0x4);
7106	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7107		data_length) != 0x8);
7108	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7109		reserved1) != 0xa);
7110	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
7111		data) != 0xc);
7112	BUILD_BUG_ON(sizeof(struct pqi_aio_error_info) != 0x10c);
7113
7114	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7115		data_in_result) != 0x0);
7116	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7117		data_out_result) != 0x1);
7118	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7119		reserved) != 0x2);
7120	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7121		status) != 0x5);
7122	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7123		status_qualifier) != 0x6);
7124	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7125		sense_data_length) != 0x8);
7126	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7127		response_data_length) != 0xa);
7128	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7129		data_in_transferred) != 0xc);
7130	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7131		data_out_transferred) != 0x10);
7132	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
7133		data) != 0x14);
7134	BUILD_BUG_ON(sizeof(struct pqi_raid_error_info) != 0x114);
7135
7136	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7137		signature) != 0x0);
7138	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7139		function_and_status_code) != 0x8);
7140	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7141		max_admin_iq_elements) != 0x10);
7142	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7143		max_admin_oq_elements) != 0x11);
7144	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7145		admin_iq_element_length) != 0x12);
7146	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7147		admin_oq_element_length) != 0x13);
7148	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7149		max_reset_timeout) != 0x14);
7150	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7151		legacy_intx_status) != 0x18);
7152	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7153		legacy_intx_mask_set) != 0x1c);
7154	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7155		legacy_intx_mask_clear) != 0x20);
7156	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7157		device_status) != 0x40);
7158	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7159		admin_iq_pi_offset) != 0x48);
7160	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7161		admin_oq_ci_offset) != 0x50);
7162	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7163		admin_iq_element_array_addr) != 0x58);
7164	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7165		admin_oq_element_array_addr) != 0x60);
7166	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7167		admin_iq_ci_addr) != 0x68);
7168	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7169		admin_oq_pi_addr) != 0x70);
7170	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7171		admin_iq_num_elements) != 0x78);
7172	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7173		admin_oq_num_elements) != 0x79);
7174	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7175		admin_queue_int_msg_num) != 0x7a);
7176	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7177		device_error) != 0x80);
7178	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7179		error_details) != 0x88);
7180	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7181		device_reset) != 0x90);
7182	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
7183		power_action) != 0x94);
7184	BUILD_BUG_ON(sizeof(struct pqi_device_registers) != 0x100);
7185
7186	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7187		header.iu_type) != 0);
7188	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7189		header.iu_length) != 2);
7190	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7191		header.work_area) != 6);
7192	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7193		request_id) != 8);
7194	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7195		function_code) != 10);
7196	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7197		data.report_device_capability.buffer_length) != 44);
7198	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7199		data.report_device_capability.sg_descriptor) != 48);
7200	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7201		data.create_operational_iq.queue_id) != 12);
7202	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7203		data.create_operational_iq.element_array_addr) != 16);
7204	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7205		data.create_operational_iq.ci_addr) != 24);
7206	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7207		data.create_operational_iq.num_elements) != 32);
7208	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7209		data.create_operational_iq.element_length) != 34);
7210	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7211		data.create_operational_iq.queue_protocol) != 36);
7212	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7213		data.create_operational_oq.queue_id) != 12);
7214	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7215		data.create_operational_oq.element_array_addr) != 16);
7216	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7217		data.create_operational_oq.pi_addr) != 24);
7218	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7219		data.create_operational_oq.num_elements) != 32);
7220	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7221		data.create_operational_oq.element_length) != 34);
7222	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7223		data.create_operational_oq.queue_protocol) != 36);
7224	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7225		data.create_operational_oq.int_msg_num) != 40);
7226	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7227		data.create_operational_oq.coalescing_count) != 42);
7228	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7229		data.create_operational_oq.min_coalescing_time) != 44);
7230	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7231		data.create_operational_oq.max_coalescing_time) != 48);
7232	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
7233		data.delete_operational_queue.queue_id) != 12);
7234	BUILD_BUG_ON(sizeof(struct pqi_general_admin_request) != 64);
7235	BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
7236		data.create_operational_iq) != 64 - 11);
7237	BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
7238		data.create_operational_oq) != 64 - 11);
7239	BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
7240		data.delete_operational_queue) != 64 - 11);
7241
7242	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7243		header.iu_type) != 0);
7244	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7245		header.iu_length) != 2);
7246	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7247		header.work_area) != 6);
7248	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7249		request_id) != 8);
7250	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7251		function_code) != 10);
7252	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7253		status) != 11);
7254	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7255		data.create_operational_iq.status_descriptor) != 12);
7256	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7257		data.create_operational_iq.iq_pi_offset) != 16);
7258	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7259		data.create_operational_oq.status_descriptor) != 12);
7260	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
7261		data.create_operational_oq.oq_ci_offset) != 16);
7262	BUILD_BUG_ON(sizeof(struct pqi_general_admin_response) != 64);
7263
7264	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7265		header.iu_type) != 0);
7266	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7267		header.iu_length) != 2);
7268	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7269		header.response_queue_id) != 4);
7270	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7271		header.work_area) != 6);
7272	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7273		request_id) != 8);
7274	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7275		nexus_id) != 10);
7276	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7277		buffer_length) != 12);
7278	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7279		lun_number) != 16);
7280	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7281		protocol_specific) != 24);
7282	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7283		error_index) != 27);
7284	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7285		cdb) != 32);
7286	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
7287		sg_descriptors) != 64);
7288	BUILD_BUG_ON(sizeof(struct pqi_raid_path_request) !=
7289		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
7290
7291	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7292		header.iu_type) != 0);
7293	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7294		header.iu_length) != 2);
7295	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7296		header.response_queue_id) != 4);
7297	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7298		header.work_area) != 6);
7299	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7300		request_id) != 8);
7301	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7302		nexus_id) != 12);
7303	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7304		buffer_length) != 16);
7305	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7306		data_encryption_key_index) != 22);
7307	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7308		encrypt_tweak_lower) != 24);
7309	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7310		encrypt_tweak_upper) != 28);
7311	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7312		cdb) != 32);
7313	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7314		error_index) != 48);
7315	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7316		num_sg_descriptors) != 50);
7317	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7318		cdb_length) != 51);
7319	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7320		lun_number) != 52);
7321	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
7322		sg_descriptors) != 64);
7323	BUILD_BUG_ON(sizeof(struct pqi_aio_path_request) !=
7324		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
7325
7326	BUILD_BUG_ON(offsetof(struct pqi_io_response,
7327		header.iu_type) != 0);
7328	BUILD_BUG_ON(offsetof(struct pqi_io_response,
7329		header.iu_length) != 2);
7330	BUILD_BUG_ON(offsetof(struct pqi_io_response,
7331		request_id) != 8);
7332	BUILD_BUG_ON(offsetof(struct pqi_io_response,
7333		error_index) != 10);
7334
7335	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7336		header.iu_type) != 0);
7337	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7338		header.iu_length) != 2);
7339	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7340		header.response_queue_id) != 4);
7341	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7342		request_id) != 8);
7343	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7344		data.report_event_configuration.buffer_length) != 12);
7345	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7346		data.report_event_configuration.sg_descriptors) != 16);
7347	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7348		data.set_event_configuration.global_event_oq_id) != 10);
7349	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7350		data.set_event_configuration.buffer_length) != 12);
7351	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
7352		data.set_event_configuration.sg_descriptors) != 16);
7353
7354	BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
7355		max_inbound_iu_length) != 6);
7356	BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
7357		max_outbound_iu_length) != 14);
7358	BUILD_BUG_ON(sizeof(struct pqi_iu_layer_descriptor) != 16);
7359
7360	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7361		data_length) != 0);
7362	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7363		iq_arbitration_priority_support_bitmask) != 8);
7364	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7365		maximum_aw_a) != 9);
7366	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7367		maximum_aw_b) != 10);
7368	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7369		maximum_aw_c) != 11);
7370	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7371		max_inbound_queues) != 16);
7372	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7373		max_elements_per_iq) != 18);
7374	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7375		max_iq_element_length) != 24);
7376	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7377		min_iq_element_length) != 26);
7378	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7379		max_outbound_queues) != 30);
7380	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7381		max_elements_per_oq) != 32);
7382	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7383		intr_coalescing_time_granularity) != 34);
7384	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7385		max_oq_element_length) != 36);
7386	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7387		min_oq_element_length) != 38);
7388	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
7389		iu_layer_descriptors) != 64);
7390	BUILD_BUG_ON(sizeof(struct pqi_device_capability) != 576);
7391
7392	BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
7393		event_type) != 0);
7394	BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
7395		oq_id) != 2);
7396	BUILD_BUG_ON(sizeof(struct pqi_event_descriptor) != 4);
7397
7398	BUILD_BUG_ON(offsetof(struct pqi_event_config,
7399		num_event_descriptors) != 2);
7400	BUILD_BUG_ON(offsetof(struct pqi_event_config,
7401		descriptors) != 4);
7402
7403	BUILD_BUG_ON(PQI_NUM_SUPPORTED_EVENTS !=
7404		ARRAY_SIZE(pqi_supported_event_types));
7405
7406	BUILD_BUG_ON(offsetof(struct pqi_event_response,
7407		header.iu_type) != 0);
7408	BUILD_BUG_ON(offsetof(struct pqi_event_response,
7409		header.iu_length) != 2);
7410	BUILD_BUG_ON(offsetof(struct pqi_event_response,
7411		event_type) != 8);
7412	BUILD_BUG_ON(offsetof(struct pqi_event_response,
7413		event_id) != 10);
7414	BUILD_BUG_ON(offsetof(struct pqi_event_response,
7415		additional_event_id) != 12);
7416	BUILD_BUG_ON(offsetof(struct pqi_event_response,
7417		data) != 16);
7418	BUILD_BUG_ON(sizeof(struct pqi_event_response) != 32);
7419
7420	BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7421		header.iu_type) != 0);
7422	BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7423		header.iu_length) != 2);
7424	BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7425		event_type) != 8);
7426	BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7427		event_id) != 10);
7428	BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
7429		additional_event_id) != 12);
7430	BUILD_BUG_ON(sizeof(struct pqi_event_acknowledge_request) != 16);
7431
7432	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7433		header.iu_type) != 0);
7434	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7435		header.iu_length) != 2);
7436	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7437		request_id) != 8);
7438	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7439		nexus_id) != 10);
7440	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7441		lun_number) != 16);
7442	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7443		protocol_specific) != 24);
7444	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7445		outbound_queue_id_to_manage) != 26);
7446	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7447		request_id_to_manage) != 28);
7448	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
7449		task_management_function) != 30);
7450	BUILD_BUG_ON(sizeof(struct pqi_task_management_request) != 32);
7451
7452	BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7453		header.iu_type) != 0);
7454	BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7455		header.iu_length) != 2);
7456	BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7457		request_id) != 8);
7458	BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7459		nexus_id) != 10);
7460	BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7461		additional_response_info) != 12);
7462	BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
7463		response_code) != 15);
7464	BUILD_BUG_ON(sizeof(struct pqi_task_management_response) != 16);
7465
7466	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7467		configured_logical_drive_count) != 0);
7468	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7469		configuration_signature) != 1);
7470	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7471		firmware_version) != 5);
7472	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7473		extended_logical_unit_count) != 154);
7474	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7475		firmware_build_number) != 190);
7476	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
7477		controller_mode) != 292);
7478
7479	BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7480		phys_bay_in_box) != 115);
7481	BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7482		device_type) != 120);
7483	BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7484		redundant_path_present_map) != 1736);
7485	BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7486		active_path_number) != 1738);
7487	BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7488		alternate_paths_phys_connector) != 1739);
7489	BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7490		alternate_paths_phys_box_on_port) != 1755);
7491	BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
7492		current_queue_depth_limit) != 1796);
7493	BUILD_BUG_ON(sizeof(struct bmic_identify_physical_device) != 2560);
7494
7495	BUILD_BUG_ON(PQI_ADMIN_IQ_NUM_ELEMENTS > 255);
7496	BUILD_BUG_ON(PQI_ADMIN_OQ_NUM_ELEMENTS > 255);
7497	BUILD_BUG_ON(PQI_ADMIN_IQ_ELEMENT_LENGTH %
7498		PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7499	BUILD_BUG_ON(PQI_ADMIN_OQ_ELEMENT_LENGTH %
7500		PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7501	BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH > 1048560);
7502	BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH %
7503		PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7504	BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH > 1048560);
7505	BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH %
7506		PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
7507
7508	BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= PQI_MAX_OUTSTANDING_REQUESTS);
7509	BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >=
7510		PQI_MAX_OUTSTANDING_REQUESTS_KDUMP);
7511}