Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 10557 insertions, 0 deletions

diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c
new file mode 100644
index 000000000..47d487729
--- /dev/null
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -0,0 +1,10557 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *    driver for Microchip PQI-based storage controllers
+ *    Copyright (c) 2019-2022 Microchip Technology Inc. and its subsidiaries
+ *    Copyright (c) 2016-2018 Microsemi Corporation
+ *    Copyright (c) 2016 PMC-Sierra, Inc.
+ *
+ *    Questions/Comments/Bugfixes to storagedev@microchip.com
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <linux/rtc.h>
+#include <linux/bcd.h>
+#include <linux/reboot.h>
+#include <linux/cciss_ioctl.h>
+#include <linux/blk-mq-pci.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_eh.h>
+#include <scsi/scsi_transport_sas.h>
+#include <asm/unaligned.h>
+#include "smartpqi.h"
+#include "smartpqi_sis.h"
+
+#if !defined(BUILD_TIMESTAMP)
+#define BUILD_TIMESTAMP
+#endif
+
+#define DRIVER_VERSION		"2.1.18-045"
+#define DRIVER_MAJOR		2
+#define DRIVER_MINOR		1
+#define DRIVER_RELEASE		18
+#define DRIVER_REVISION		45
+
+#define DRIVER_NAME		"Microchip SmartPQI Driver (v" \
+				DRIVER_VERSION BUILD_TIMESTAMP ")"
+#define DRIVER_NAME_SHORT	"smartpqi"
+
+#define PQI_EXTRA_SGL_MEMORY	(12 * sizeof(struct pqi_sg_descriptor))
+
+#define PQI_POST_RESET_DELAY_SECS			5
+#define PQI_POST_OFA_RESET_DELAY_UPON_TIMEOUT_SECS	10
+
+MODULE_AUTHOR("Microchip");
+MODULE_DESCRIPTION("Driver for Microchip Smart Family Controller version "
+	DRIVER_VERSION);
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL");
+
+struct pqi_cmd_priv {
+	int this_residual;
+};
+
+static struct pqi_cmd_priv *pqi_cmd_priv(struct scsi_cmnd *cmd)
+{
+	return scsi_cmd_priv(cmd);
+}
+
+static void pqi_verify_structures(void);
+static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info,
+	enum pqi_ctrl_shutdown_reason ctrl_shutdown_reason);
+static void pqi_ctrl_offline_worker(struct work_struct *work);
+static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info);
+static void pqi_scan_start(struct Scsi_Host *shost);
+static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_queue_group *queue_group, enum pqi_io_path path,
+	struct pqi_io_request *io_request);
+static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_iu_header *request, unsigned int flags,
+	struct pqi_raid_error_info *error_info);
+static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
+	struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
+	unsigned int cdb_length, struct pqi_queue_group *queue_group,
+	struct pqi_encryption_info *encryption_info, bool raid_bypass, bool io_high_prio);
+static  int pqi_aio_submit_r1_write_io(struct pqi_ctrl_info *ctrl_info,
+	struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
+	struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
+	struct pqi_scsi_dev_raid_map_data *rmd);
+static int pqi_aio_submit_r56_write_io(struct pqi_ctrl_info *ctrl_info,
+	struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
+	struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
+	struct pqi_scsi_dev_raid_map_data *rmd);
+static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info);
+static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info);
+static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info, unsigned int delay_secs);
+static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info);
+static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info);
+static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info);
+static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device, u8 lun, unsigned long timeout_msecs);
+static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info);
+
+/* for flags argument to pqi_submit_raid_request_synchronous() */
+#define PQI_SYNC_FLAGS_INTERRUPTABLE	0x1
+
+static struct scsi_transport_template *pqi_sas_transport_template;
+
+static atomic_t pqi_controller_count = ATOMIC_INIT(0);
+
+enum pqi_lockup_action {
+	NONE,
+	REBOOT,
+	PANIC
+};
+
+static enum pqi_lockup_action pqi_lockup_action = NONE;
+
+static struct {
+	enum pqi_lockup_action	action;
+	char			*name;
+} pqi_lockup_actions[] = {
+	{
+		.action = NONE,
+		.name = "none",
+	},
+	{
+		.action = REBOOT,
+		.name = "reboot",
+	},
+	{
+		.action = PANIC,
+		.name = "panic",
+	},
+};
+
+static unsigned int pqi_supported_event_types[] = {
+	PQI_EVENT_TYPE_HOTPLUG,
+	PQI_EVENT_TYPE_HARDWARE,
+	PQI_EVENT_TYPE_PHYSICAL_DEVICE,
+	PQI_EVENT_TYPE_LOGICAL_DEVICE,
+	PQI_EVENT_TYPE_OFA,
+	PQI_EVENT_TYPE_AIO_STATE_CHANGE,
+	PQI_EVENT_TYPE_AIO_CONFIG_CHANGE,
+};
+
+static int pqi_disable_device_id_wildcards;
+module_param_named(disable_device_id_wildcards,
+	pqi_disable_device_id_wildcards, int, 0644);
+MODULE_PARM_DESC(disable_device_id_wildcards,
+	"Disable device ID wildcards.");
+
+static int pqi_disable_heartbeat;
+module_param_named(disable_heartbeat,
+	pqi_disable_heartbeat, int, 0644);
+MODULE_PARM_DESC(disable_heartbeat,
+	"Disable heartbeat.");
+
+static int pqi_disable_ctrl_shutdown;
+module_param_named(disable_ctrl_shutdown,
+	pqi_disable_ctrl_shutdown, int, 0644);
+MODULE_PARM_DESC(disable_ctrl_shutdown,
+	"Disable controller shutdown when controller locked up.");
+
+static char *pqi_lockup_action_param;
+module_param_named(lockup_action,
+	pqi_lockup_action_param, charp, 0644);
+MODULE_PARM_DESC(lockup_action, "Action to take when controller locked up.\n"
+	"\t\tSupported: none, reboot, panic\n"
+	"\t\tDefault: none");
+
+static int pqi_expose_ld_first;
+module_param_named(expose_ld_first,
+	pqi_expose_ld_first, int, 0644);
+MODULE_PARM_DESC(expose_ld_first, "Expose logical drives before physical drives.");
+
+static int pqi_hide_vsep;
+module_param_named(hide_vsep,
+	pqi_hide_vsep, int, 0644);
+MODULE_PARM_DESC(hide_vsep, "Hide the virtual SEP for direct attached drives.");
+
+static int pqi_disable_managed_interrupts;
+module_param_named(disable_managed_interrupts,
+	pqi_disable_managed_interrupts, int, 0644);
+MODULE_PARM_DESC(disable_managed_interrupts,
+	"Disable the kernel automatically assigning SMP affinity to IRQs.");
+
+static unsigned int pqi_ctrl_ready_timeout_secs;
+module_param_named(ctrl_ready_timeout,
+	pqi_ctrl_ready_timeout_secs, uint, 0644);
+MODULE_PARM_DESC(ctrl_ready_timeout,
+	"Timeout in seconds for driver to wait for controller ready.");
+
+static char *raid_levels[] = {
+	"RAID-0",
+	"RAID-4",
+	"RAID-1(1+0)",
+	"RAID-5",
+	"RAID-5+1",
+	"RAID-6",
+	"RAID-1(Triple)",
+};
+
+static char *pqi_raid_level_to_string(u8 raid_level)
+{
+	if (raid_level < ARRAY_SIZE(raid_levels))
+		return raid_levels[raid_level];
+
+	return "RAID UNKNOWN";
+}
+
+#define SA_RAID_0		0
+#define SA_RAID_4		1
+#define SA_RAID_1		2	/* also used for RAID 10 */
+#define SA_RAID_5		3	/* also used for RAID 50 */
+#define SA_RAID_51		4
+#define SA_RAID_6		5	/* also used for RAID 60 */
+#define SA_RAID_TRIPLE		6	/* also used for RAID 1+0 Triple */
+#define SA_RAID_MAX		SA_RAID_TRIPLE
+#define SA_RAID_UNKNOWN		0xff
+
+static inline void pqi_scsi_done(struct scsi_cmnd *scmd)
+{
+	pqi_prep_for_scsi_done(scmd);
+	scsi_done(scmd);
+}
+
+static inline void pqi_disable_write_same(struct scsi_device *sdev)
+{
+	sdev->no_write_same = 1;
+}
+
+static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2)
+{
+	return memcmp(scsi3addr1, scsi3addr2, 8) == 0;
+}
+
+static inline bool pqi_is_logical_device(struct pqi_scsi_dev *device)
+{
+	return !device->is_physical_device;
+}
+
+static inline bool pqi_is_external_raid_addr(u8 *scsi3addr)
+{
+	return scsi3addr[2] != 0;
+}
+
+static inline bool pqi_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
+{
+	return !ctrl_info->controller_online;
+}
+
+static inline void pqi_check_ctrl_health(struct pqi_ctrl_info *ctrl_info)
+{
+	if (ctrl_info->controller_online)
+		if (!sis_is_firmware_running(ctrl_info))
+			pqi_take_ctrl_offline(ctrl_info, PQI_FIRMWARE_KERNEL_NOT_UP);
+}
+
+static inline bool pqi_is_hba_lunid(u8 *scsi3addr)
+{
+	return pqi_scsi3addr_equal(scsi3addr, RAID_CTLR_LUNID);
+}
+
+#define PQI_DRIVER_SCRATCH_PQI_MODE			0x1
+#define PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED		0x2
+
+static inline enum pqi_ctrl_mode pqi_get_ctrl_mode(struct pqi_ctrl_info *ctrl_info)
+{
+	return sis_read_driver_scratch(ctrl_info) & PQI_DRIVER_SCRATCH_PQI_MODE ? PQI_MODE : SIS_MODE;
+}
+
+static inline void pqi_save_ctrl_mode(struct pqi_ctrl_info *ctrl_info,
+	enum pqi_ctrl_mode mode)
+{
+	u32 driver_scratch;
+
+	driver_scratch = sis_read_driver_scratch(ctrl_info);
+
+	if (mode == PQI_MODE)
+		driver_scratch |= PQI_DRIVER_SCRATCH_PQI_MODE;
+	else
+		driver_scratch &= ~PQI_DRIVER_SCRATCH_PQI_MODE;
+
+	sis_write_driver_scratch(ctrl_info, driver_scratch);
+}
+
+static inline bool pqi_is_fw_triage_supported(struct pqi_ctrl_info *ctrl_info)
+{
+	return (sis_read_driver_scratch(ctrl_info) & PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED) != 0;
+}
+
+static inline void pqi_save_fw_triage_setting(struct pqi_ctrl_info *ctrl_info, bool is_supported)
+{
+	u32 driver_scratch;
+
+	driver_scratch = sis_read_driver_scratch(ctrl_info);
+
+	if (is_supported)
+		driver_scratch |= PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED;
+	else
+		driver_scratch &= ~PQI_DRIVER_SCRATCH_FW_TRIAGE_SUPPORTED;
+
+	sis_write_driver_scratch(ctrl_info, driver_scratch);
+}
+
+static inline void pqi_ctrl_block_scan(struct pqi_ctrl_info *ctrl_info)
+{
+	ctrl_info->scan_blocked = true;
+	mutex_lock(&ctrl_info->scan_mutex);
+}
+
+static inline void pqi_ctrl_unblock_scan(struct pqi_ctrl_info *ctrl_info)
+{
+	ctrl_info->scan_blocked = false;
+	mutex_unlock(&ctrl_info->scan_mutex);
+}
+
+static inline bool pqi_ctrl_scan_blocked(struct pqi_ctrl_info *ctrl_info)
+{
+	return ctrl_info->scan_blocked;
+}
+
+static inline void pqi_ctrl_block_device_reset(struct pqi_ctrl_info *ctrl_info)
+{
+	mutex_lock(&ctrl_info->lun_reset_mutex);
+}
+
+static inline void pqi_ctrl_unblock_device_reset(struct pqi_ctrl_info *ctrl_info)
+{
+	mutex_unlock(&ctrl_info->lun_reset_mutex);
+}
+
+static inline void pqi_scsi_block_requests(struct pqi_ctrl_info *ctrl_info)
+{
+	struct Scsi_Host *shost;
+	unsigned int num_loops;
+	int msecs_sleep;
+
+	shost = ctrl_info->scsi_host;
+
+	scsi_block_requests(shost);
+
+	num_loops = 0;
+	msecs_sleep = 20;
+	while (scsi_host_busy(shost)) {
+		num_loops++;
+		if (num_loops == 10)
+			msecs_sleep = 500;
+		msleep(msecs_sleep);
+	}
+}
+
+static inline void pqi_scsi_unblock_requests(struct pqi_ctrl_info *ctrl_info)
+{
+	scsi_unblock_requests(ctrl_info->scsi_host);
+}
+
+static inline void pqi_ctrl_busy(struct pqi_ctrl_info *ctrl_info)
+{
+	atomic_inc(&ctrl_info->num_busy_threads);
+}
+
+static inline void pqi_ctrl_unbusy(struct pqi_ctrl_info *ctrl_info)
+{
+	atomic_dec(&ctrl_info->num_busy_threads);
+}
+
+static inline bool pqi_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
+{
+	return ctrl_info->block_requests;
+}
+
+static inline void pqi_ctrl_block_requests(struct pqi_ctrl_info *ctrl_info)
+{
+	ctrl_info->block_requests = true;
+}
+
+static inline void pqi_ctrl_unblock_requests(struct pqi_ctrl_info *ctrl_info)
+{
+	ctrl_info->block_requests = false;
+	wake_up_all(&ctrl_info->block_requests_wait);
+}
+
+static void pqi_wait_if_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
+{
+	if (!pqi_ctrl_blocked(ctrl_info))
+		return;
+
+	atomic_inc(&ctrl_info->num_blocked_threads);
+	wait_event(ctrl_info->block_requests_wait,
+		!pqi_ctrl_blocked(ctrl_info));
+	atomic_dec(&ctrl_info->num_blocked_threads);
+}
+
+#define PQI_QUIESCE_WARNING_TIMEOUT_SECS		10
+
+static inline void pqi_ctrl_wait_until_quiesced(struct pqi_ctrl_info *ctrl_info)
+{
+	unsigned long start_jiffies;
+	unsigned long warning_timeout;
+	bool displayed_warning;
+
+	displayed_warning = false;
+	start_jiffies = jiffies;
+	warning_timeout = (PQI_QUIESCE_WARNING_TIMEOUT_SECS * HZ) + start_jiffies;
+
+	while (atomic_read(&ctrl_info->num_busy_threads) >
+		atomic_read(&ctrl_info->num_blocked_threads)) {
+		if (time_after(jiffies, warning_timeout)) {
+			dev_warn(&ctrl_info->pci_dev->dev,
+				"waiting %u seconds for driver activity to quiesce\n",
+				jiffies_to_msecs(jiffies - start_jiffies) / 1000);
+			displayed_warning = true;
+			warning_timeout = (PQI_QUIESCE_WARNING_TIMEOUT_SECS * HZ) + jiffies;
+		}
+		usleep_range(1000, 2000);
+	}
+
+	if (displayed_warning)
+		dev_warn(&ctrl_info->pci_dev->dev,
+			"driver activity quiesced after waiting for %u seconds\n",
+			jiffies_to_msecs(jiffies - start_jiffies) / 1000);
+}
+
+static inline bool pqi_device_offline(struct pqi_scsi_dev *device)
+{
+	return device->device_offline;
+}
+
+static inline void pqi_ctrl_ofa_start(struct pqi_ctrl_info *ctrl_info)
+{
+	mutex_lock(&ctrl_info->ofa_mutex);
+}
+
+static inline void pqi_ctrl_ofa_done(struct pqi_ctrl_info *ctrl_info)
+{
+	mutex_unlock(&ctrl_info->ofa_mutex);
+}
+
+static inline void pqi_wait_until_ofa_finished(struct pqi_ctrl_info *ctrl_info)
+{
+	mutex_lock(&ctrl_info->ofa_mutex);
+	mutex_unlock(&ctrl_info->ofa_mutex);
+}
+
+static inline bool pqi_ofa_in_progress(struct pqi_ctrl_info *ctrl_info)
+{
+	return mutex_is_locked(&ctrl_info->ofa_mutex);
+}
+
+static inline void pqi_device_remove_start(struct pqi_scsi_dev *device)
+{
+	device->in_remove = true;
+}
+
+static inline bool pqi_device_in_remove(struct pqi_scsi_dev *device)
+{
+	return device->in_remove;
+}
+
+static inline int pqi_event_type_to_event_index(unsigned int event_type)
+{
+	int index;
+
+	for (index = 0; index < ARRAY_SIZE(pqi_supported_event_types); index++)
+		if (event_type == pqi_supported_event_types[index])
+			return index;
+
+	return -1;
+}
+
+static inline bool pqi_is_supported_event(unsigned int event_type)
+{
+	return pqi_event_type_to_event_index(event_type) != -1;
+}
+
+static inline void pqi_schedule_rescan_worker_with_delay(struct pqi_ctrl_info *ctrl_info,
+	unsigned long delay)
+{
+	if (pqi_ctrl_offline(ctrl_info))
+		return;
+
+	schedule_delayed_work(&ctrl_info->rescan_work, delay);
+}
+
+static inline void pqi_schedule_rescan_worker(struct pqi_ctrl_info *ctrl_info)
+{
+	pqi_schedule_rescan_worker_with_delay(ctrl_info, 0);
+}
+
+#define PQI_RESCAN_WORK_DELAY	(10 * HZ)
+
+static inline void pqi_schedule_rescan_worker_delayed(struct pqi_ctrl_info *ctrl_info)
+{
+	pqi_schedule_rescan_worker_with_delay(ctrl_info, PQI_RESCAN_WORK_DELAY);
+}
+
+static inline void pqi_cancel_rescan_worker(struct pqi_ctrl_info *ctrl_info)
+{
+	cancel_delayed_work_sync(&ctrl_info->rescan_work);
+}
+
+static inline u32 pqi_read_heartbeat_counter(struct pqi_ctrl_info *ctrl_info)
+{
+	if (!ctrl_info->heartbeat_counter)
+		return 0;
+
+	return readl(ctrl_info->heartbeat_counter);
+}
+
+static inline u8 pqi_read_soft_reset_status(struct pqi_ctrl_info *ctrl_info)
+{
+	return readb(ctrl_info->soft_reset_status);
+}
+
+static inline void pqi_clear_soft_reset_status(struct pqi_ctrl_info *ctrl_info)
+{
+	u8 status;
+
+	status = pqi_read_soft_reset_status(ctrl_info);
+	status &= ~PQI_SOFT_RESET_ABORT;
+	writeb(status, ctrl_info->soft_reset_status);
+}
+
+static int pqi_map_single(struct pci_dev *pci_dev,
+	struct pqi_sg_descriptor *sg_descriptor, void *buffer,
+	size_t buffer_length, enum dma_data_direction data_direction)
+{
+	dma_addr_t bus_address;
+
+	if (!buffer || buffer_length == 0 || data_direction == DMA_NONE)
+		return 0;
+
+	bus_address = dma_map_single(&pci_dev->dev, buffer, buffer_length,
+		data_direction);
+	if (dma_mapping_error(&pci_dev->dev, bus_address))
+		return -ENOMEM;
+
+	put_unaligned_le64((u64)bus_address, &sg_descriptor->address);
+	put_unaligned_le32(buffer_length, &sg_descriptor->length);
+	put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
+
+	return 0;
+}
+
+static void pqi_pci_unmap(struct pci_dev *pci_dev,
+	struct pqi_sg_descriptor *descriptors, int num_descriptors,
+	enum dma_data_direction data_direction)
+{
+	int i;
+
+	if (data_direction == DMA_NONE)
+		return;
+
+	for (i = 0; i < num_descriptors; i++)
+		dma_unmap_single(&pci_dev->dev,
+			(dma_addr_t)get_unaligned_le64(&descriptors[i].address),
+			get_unaligned_le32(&descriptors[i].length),
+			data_direction);
+}
+
+static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_raid_path_request *request, u8 cmd,
+	u8 *scsi3addr, void *buffer, size_t buffer_length,
+	u16 vpd_page, enum dma_data_direction *dir)
+{
+	u8 *cdb;
+	size_t cdb_length = buffer_length;
+
+	memset(request, 0, sizeof(*request));
+
+	request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
+	put_unaligned_le16(offsetof(struct pqi_raid_path_request,
+		sg_descriptors[1]) - PQI_REQUEST_HEADER_LENGTH,
+		&request->header.iu_length);
+	put_unaligned_le32(buffer_length, &request->buffer_length);
+	memcpy(request->lun_number, scsi3addr, sizeof(request->lun_number));
+	request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
+	request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
+
+	cdb = request->cdb;
+
+	switch (cmd) {
+	case TEST_UNIT_READY:
+		request->data_direction = SOP_READ_FLAG;
+		cdb[0] = TEST_UNIT_READY;
+		break;
+	case INQUIRY:
+		request->data_direction = SOP_READ_FLAG;
+		cdb[0] = INQUIRY;
+		if (vpd_page & VPD_PAGE) {
+			cdb[1] = 0x1;
+			cdb[2] = (u8)vpd_page;
+		}
+		cdb[4] = (u8)cdb_length;
+		break;
+	case CISS_REPORT_LOG:
+	case CISS_REPORT_PHYS:
+		request->data_direction = SOP_READ_FLAG;
+		cdb[0] = cmd;
+		if (cmd == CISS_REPORT_PHYS) {
+			if (ctrl_info->rpl_extended_format_4_5_supported)
+				cdb[1] = CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_4;
+			else
+				cdb[1] = CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_2;
+		} else {
+			cdb[1] = ctrl_info->ciss_report_log_flags;
+		}
+		put_unaligned_be32(cdb_length, &cdb[6]);
+		break;
+	case CISS_GET_RAID_MAP:
+		request->data_direction = SOP_READ_FLAG;
+		cdb[0] = CISS_READ;
+		cdb[1] = CISS_GET_RAID_MAP;
+		put_unaligned_be32(cdb_length, &cdb[6]);
+		break;
+	case SA_FLUSH_CACHE:
+		request->header.driver_flags = PQI_DRIVER_NONBLOCKABLE_REQUEST;
+		request->data_direction = SOP_WRITE_FLAG;
+		cdb[0] = BMIC_WRITE;
+		cdb[6] = BMIC_FLUSH_CACHE;
+		put_unaligned_be16(cdb_length, &cdb[7]);
+		break;
+	case BMIC_SENSE_DIAG_OPTIONS:
+		cdb_length = 0;
+		fallthrough;
+	case BMIC_IDENTIFY_CONTROLLER:
+	case BMIC_IDENTIFY_PHYSICAL_DEVICE:
+	case BMIC_SENSE_SUBSYSTEM_INFORMATION:
+	case BMIC_SENSE_FEATURE:
+		request->data_direction = SOP_READ_FLAG;
+		cdb[0] = BMIC_READ;
+		cdb[6] = cmd;
+		put_unaligned_be16(cdb_length, &cdb[7]);
+		break;
+	case BMIC_SET_DIAG_OPTIONS:
+		cdb_length = 0;
+		fallthrough;
+	case BMIC_WRITE_HOST_WELLNESS:
+		request->data_direction = SOP_WRITE_FLAG;
+		cdb[0] = BMIC_WRITE;
+		cdb[6] = cmd;
+		put_unaligned_be16(cdb_length, &cdb[7]);
+		break;
+	case BMIC_CSMI_PASSTHRU:
+		request->data_direction = SOP_BIDIRECTIONAL;
+		cdb[0] = BMIC_WRITE;
+		cdb[5] = CSMI_CC_SAS_SMP_PASSTHRU;
+		cdb[6] = cmd;
+		put_unaligned_be16(cdb_length, &cdb[7]);
+		break;
+	default:
+		dev_err(&ctrl_info->pci_dev->dev, "unknown command 0x%c\n", cmd);
+		break;
+	}
+
+	switch (request->data_direction) {
+	case SOP_READ_FLAG:
+		*dir = DMA_FROM_DEVICE;
+		break;
+	case SOP_WRITE_FLAG:
+		*dir = DMA_TO_DEVICE;
+		break;
+	case SOP_NO_DIRECTION_FLAG:
+		*dir = DMA_NONE;
+		break;
+	default:
+		*dir = DMA_BIDIRECTIONAL;
+		break;
+	}
+
+	return pqi_map_single(ctrl_info->pci_dev, &request->sg_descriptors[0],
+		buffer, buffer_length, *dir);
+}
+
+static inline void pqi_reinit_io_request(struct pqi_io_request *io_request)
+{
+	io_request->scmd = NULL;
+	io_request->status = 0;
+	io_request->error_info = NULL;
+	io_request->raid_bypass = false;
+}
+
+static struct pqi_io_request *pqi_alloc_io_request(
+	struct pqi_ctrl_info *ctrl_info)
+{
+	struct pqi_io_request *io_request;
+	u16 i = ctrl_info->next_io_request_slot;	/* benignly racy */
+
+	while (1) {
+		io_request = &ctrl_info->io_request_pool[i];
+		if (atomic_inc_return(&io_request->refcount) == 1)
+			break;
+		atomic_dec(&io_request->refcount);
+		i = (i + 1) % ctrl_info->max_io_slots;
+	}
+
+	/* benignly racy */
+	ctrl_info->next_io_request_slot = (i + 1) % ctrl_info->max_io_slots;
+
+	pqi_reinit_io_request(io_request);
+
+	return io_request;
+}
+
+static void pqi_free_io_request(struct pqi_io_request *io_request)
+{
+	atomic_dec(&io_request->refcount);
+}
+
+static int pqi_send_scsi_raid_request(struct pqi_ctrl_info *ctrl_info, u8 cmd,
+	u8 *scsi3addr, void *buffer, size_t buffer_length, u16 vpd_page,
+	struct pqi_raid_error_info *error_info)
+{
+	int rc;
+	struct pqi_raid_path_request request;
+	enum dma_data_direction dir;
+
+	rc = pqi_build_raid_path_request(ctrl_info, &request, cmd, scsi3addr,
+		buffer, buffer_length, vpd_page, &dir);
+	if (rc)
+		return rc;
+
+	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, error_info);
+
+	pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
+
+	return rc;
+}
+
+/* helper functions for pqi_send_scsi_raid_request */
+
+static inline int pqi_send_ctrl_raid_request(struct pqi_ctrl_info *ctrl_info,
+	u8 cmd, void *buffer, size_t buffer_length)
+{
+	return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
+		buffer, buffer_length, 0, NULL);
+}
+
+static inline int pqi_send_ctrl_raid_with_error(struct pqi_ctrl_info *ctrl_info,
+	u8 cmd, void *buffer, size_t buffer_length,
+	struct pqi_raid_error_info *error_info)
+{
+	return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
+		buffer, buffer_length, 0, error_info);
+}
+
+static inline int pqi_identify_controller(struct pqi_ctrl_info *ctrl_info,
+	struct bmic_identify_controller *buffer)
+{
+	return pqi_send_ctrl_raid_request(ctrl_info, BMIC_IDENTIFY_CONTROLLER,
+		buffer, sizeof(*buffer));
+}
+
+static inline int pqi_sense_subsystem_info(struct  pqi_ctrl_info *ctrl_info,
+	struct bmic_sense_subsystem_info *sense_info)
+{
+	return pqi_send_ctrl_raid_request(ctrl_info,
+		BMIC_SENSE_SUBSYSTEM_INFORMATION, sense_info,
+		sizeof(*sense_info));
+}
+
+static inline int pqi_scsi_inquiry(struct pqi_ctrl_info *ctrl_info,
+	u8 *scsi3addr, u16 vpd_page, void *buffer, size_t buffer_length)
+{
+	return pqi_send_scsi_raid_request(ctrl_info, INQUIRY, scsi3addr,
+		buffer, buffer_length, vpd_page, NULL);
+}
+
+static int pqi_identify_physical_device(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device,
+	struct bmic_identify_physical_device *buffer, size_t buffer_length)
+{
+	int rc;
+	enum dma_data_direction dir;
+	u16 bmic_device_index;
+	struct pqi_raid_path_request request;
+
+	rc = pqi_build_raid_path_request(ctrl_info, &request,
+		BMIC_IDENTIFY_PHYSICAL_DEVICE, RAID_CTLR_LUNID, buffer,
+		buffer_length, 0, &dir);
+	if (rc)
+		return rc;
+
+	bmic_device_index = CISS_GET_DRIVE_NUMBER(device->scsi3addr);
+	request.cdb[2] = (u8)bmic_device_index;
+	request.cdb[9] = (u8)(bmic_device_index >> 8);
+
+	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
+
+	pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
+
+	return rc;
+}
+
+static inline u32 pqi_aio_limit_to_bytes(__le16 *limit)
+{
+	u32 bytes;
+
+	bytes = get_unaligned_le16(limit);
+	if (bytes == 0)
+		bytes = ~0;
+	else
+		bytes *= 1024;
+
+	return bytes;
+}
+
+#pragma pack(1)
+
+struct bmic_sense_feature_buffer {
+	struct bmic_sense_feature_buffer_header header;
+	struct bmic_sense_feature_io_page_aio_subpage aio_subpage;
+};
+
+#pragma pack()
+
+#define MINIMUM_AIO_SUBPAGE_BUFFER_LENGTH	\
+	offsetofend(struct bmic_sense_feature_buffer, \
+		aio_subpage.max_write_raid_1_10_3drive)
+
+#define MINIMUM_AIO_SUBPAGE_LENGTH	\
+	(offsetofend(struct bmic_sense_feature_io_page_aio_subpage, \
+		max_write_raid_1_10_3drive) - \
+		sizeof_field(struct bmic_sense_feature_io_page_aio_subpage, header))
+
+static int pqi_get_advanced_raid_bypass_config(struct pqi_ctrl_info *ctrl_info)
+{
+	int rc;
+	enum dma_data_direction dir;
+	struct pqi_raid_path_request request;
+	struct bmic_sense_feature_buffer *buffer;
+
+	buffer = kmalloc(sizeof(*buffer), GFP_KERNEL);
+	if (!buffer)
+		return -ENOMEM;
+
+	rc = pqi_build_raid_path_request(ctrl_info, &request, BMIC_SENSE_FEATURE, RAID_CTLR_LUNID,
+		buffer, sizeof(*buffer), 0, &dir);
+	if (rc)
+		goto error;
+
+	request.cdb[2] = BMIC_SENSE_FEATURE_IO_PAGE;
+	request.cdb[3] = BMIC_SENSE_FEATURE_IO_PAGE_AIO_SUBPAGE;
+
+	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
+
+	pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
+
+	if (rc)
+		goto error;
+
+	if (buffer->header.page_code != BMIC_SENSE_FEATURE_IO_PAGE ||
+		buffer->header.subpage_code !=
+			BMIC_SENSE_FEATURE_IO_PAGE_AIO_SUBPAGE ||
+		get_unaligned_le16(&buffer->header.buffer_length) <
+			MINIMUM_AIO_SUBPAGE_BUFFER_LENGTH ||
+		buffer->aio_subpage.header.page_code !=
+			BMIC_SENSE_FEATURE_IO_PAGE ||
+		buffer->aio_subpage.header.subpage_code !=
+			BMIC_SENSE_FEATURE_IO_PAGE_AIO_SUBPAGE ||
+		get_unaligned_le16(&buffer->aio_subpage.header.page_length) <
+			MINIMUM_AIO_SUBPAGE_LENGTH) {
+		goto error;
+	}
+
+	ctrl_info->max_transfer_encrypted_sas_sata =
+		pqi_aio_limit_to_bytes(
+			&buffer->aio_subpage.max_transfer_encrypted_sas_sata);
+
+	ctrl_info->max_transfer_encrypted_nvme =
+		pqi_aio_limit_to_bytes(
+			&buffer->aio_subpage.max_transfer_encrypted_nvme);
+
+	ctrl_info->max_write_raid_5_6 =
+		pqi_aio_limit_to_bytes(
+			&buffer->aio_subpage.max_write_raid_5_6);
+
+	ctrl_info->max_write_raid_1_10_2drive =
+		pqi_aio_limit_to_bytes(
+			&buffer->aio_subpage.max_write_raid_1_10_2drive);
+
+	ctrl_info->max_write_raid_1_10_3drive =
+		pqi_aio_limit_to_bytes(
+			&buffer->aio_subpage.max_write_raid_1_10_3drive);
+
+error:
+	kfree(buffer);
+
+	return rc;
+}
+
+static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info,
+	enum bmic_flush_cache_shutdown_event shutdown_event)
+{
+	int rc;
+	struct bmic_flush_cache *flush_cache;
+
+	flush_cache = kzalloc(sizeof(*flush_cache), GFP_KERNEL);
+	if (!flush_cache)
+		return -ENOMEM;
+
+	flush_cache->shutdown_event = shutdown_event;
+
+	rc = pqi_send_ctrl_raid_request(ctrl_info, SA_FLUSH_CACHE, flush_cache,
+		sizeof(*flush_cache));
+
+	kfree(flush_cache);
+
+	return rc;
+}
+
+int pqi_csmi_smp_passthru(struct pqi_ctrl_info *ctrl_info,
+	struct bmic_csmi_smp_passthru_buffer *buffer, size_t buffer_length,
+	struct pqi_raid_error_info *error_info)
+{
+	return pqi_send_ctrl_raid_with_error(ctrl_info, BMIC_CSMI_PASSTHRU,
+		buffer, buffer_length, error_info);
+}
+
+#define PQI_FETCH_PTRAID_DATA		(1 << 31)
+
+static int pqi_set_diag_rescan(struct pqi_ctrl_info *ctrl_info)
+{
+	int rc;
+	struct bmic_diag_options *diag;
+
+	diag = kzalloc(sizeof(*diag), GFP_KERNEL);
+	if (!diag)
+		return -ENOMEM;
+
+	rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SENSE_DIAG_OPTIONS,
+		diag, sizeof(*diag));
+	if (rc)
+		goto out;
+
+	diag->options |= cpu_to_le32(PQI_FETCH_PTRAID_DATA);
+
+	rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SET_DIAG_OPTIONS, diag,
+		sizeof(*diag));
+
+out:
+	kfree(diag);
+
+	return rc;
+}
+
+static inline int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info,
+	void *buffer, size_t buffer_length)
+{
+	return pqi_send_ctrl_raid_request(ctrl_info, BMIC_WRITE_HOST_WELLNESS,
+		buffer, buffer_length);
+}
+
+#pragma pack(1)
+
+struct bmic_host_wellness_driver_version {
+	u8	start_tag[4];
+	u8	driver_version_tag[2];
+	__le16	driver_version_length;
+	char	driver_version[32];
+	u8	dont_write_tag[2];
+	u8	end_tag[2];
+};
+
+#pragma pack()
+
+static int pqi_write_driver_version_to_host_wellness(
+	struct pqi_ctrl_info *ctrl_info)
+{
+	int rc;
+	struct bmic_host_wellness_driver_version *buffer;
+	size_t buffer_length;
+
+	buffer_length = sizeof(*buffer);
+
+	buffer = kmalloc(buffer_length, GFP_KERNEL);
+	if (!buffer)
+		return -ENOMEM;
+
+	buffer->start_tag[0] = '<';
+	buffer->start_tag[1] = 'H';
+	buffer->start_tag[2] = 'W';
+	buffer->start_tag[3] = '>';
+	buffer->driver_version_tag[0] = 'D';
+	buffer->driver_version_tag[1] = 'V';
+	put_unaligned_le16(sizeof(buffer->driver_version),
+		&buffer->driver_version_length);
+	strncpy(buffer->driver_version, "Linux " DRIVER_VERSION,
+		sizeof(buffer->driver_version) - 1);
+	buffer->driver_version[sizeof(buffer->driver_version) - 1] = '\0';
+	buffer->dont_write_tag[0] = 'D';
+	buffer->dont_write_tag[1] = 'W';
+	buffer->end_tag[0] = 'Z';
+	buffer->end_tag[1] = 'Z';
+
+	rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
+
+	kfree(buffer);
+
+	return rc;
+}
+
+#pragma pack(1)
+
+struct bmic_host_wellness_time {
+	u8	start_tag[4];
+	u8	time_tag[2];
+	__le16	time_length;
+	u8	time[8];
+	u8	dont_write_tag[2];
+	u8	end_tag[2];
+};
+
+#pragma pack()
+
+static int pqi_write_current_time_to_host_wellness(
+	struct pqi_ctrl_info *ctrl_info)
+{
+	int rc;
+	struct bmic_host_wellness_time *buffer;
+	size_t buffer_length;
+	time64_t local_time;
+	unsigned int year;
+	struct tm tm;
+
+	buffer_length = sizeof(*buffer);
+
+	buffer = kmalloc(buffer_length, GFP_KERNEL);
+	if (!buffer)
+		return -ENOMEM;
+
+	buffer->start_tag[0] = '<';
+	buffer->start_tag[1] = 'H';
+	buffer->start_tag[2] = 'W';
+	buffer->start_tag[3] = '>';
+	buffer->time_tag[0] = 'T';
+	buffer->time_tag[1] = 'D';
+	put_unaligned_le16(sizeof(buffer->time),
+		&buffer->time_length);
+
+	local_time = ktime_get_real_seconds();
+	time64_to_tm(local_time, -sys_tz.tz_minuteswest * 60, &tm);
+	year = tm.tm_year + 1900;
+
+	buffer->time[0] = bin2bcd(tm.tm_hour);
+	buffer->time[1] = bin2bcd(tm.tm_min);
+	buffer->time[2] = bin2bcd(tm.tm_sec);
+	buffer->time[3] = 0;
+	buffer->time[4] = bin2bcd(tm.tm_mon + 1);
+	buffer->time[5] = bin2bcd(tm.tm_mday);
+	buffer->time[6] = bin2bcd(year / 100);
+	buffer->time[7] = bin2bcd(year % 100);
+
+	buffer->dont_write_tag[0] = 'D';
+	buffer->dont_write_tag[1] = 'W';
+	buffer->end_tag[0] = 'Z';
+	buffer->end_tag[1] = 'Z';
+
+	rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
+
+	kfree(buffer);
+
+	return rc;
+}
+
+#define PQI_UPDATE_TIME_WORK_INTERVAL	(24UL * 60 * 60 * HZ)
+
+static void pqi_update_time_worker(struct work_struct *work)
+{
+	int rc;
+	struct pqi_ctrl_info *ctrl_info;
+
+	ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
+		update_time_work);
+
+	rc = pqi_write_current_time_to_host_wellness(ctrl_info);
+	if (rc)
+		dev_warn(&ctrl_info->pci_dev->dev,
+			"error updating time on controller\n");
+
+	schedule_delayed_work(&ctrl_info->update_time_work,
+		PQI_UPDATE_TIME_WORK_INTERVAL);
+}
+
+static inline void pqi_schedule_update_time_worker(struct pqi_ctrl_info *ctrl_info)
+{
+	schedule_delayed_work(&ctrl_info->update_time_work, 0);
+}
+
+static inline void pqi_cancel_update_time_worker(struct pqi_ctrl_info *ctrl_info)
+{
+	cancel_delayed_work_sync(&ctrl_info->update_time_work);
+}
+
+static inline int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd, void *buffer,
+	size_t buffer_length)
+{
+	return pqi_send_ctrl_raid_request(ctrl_info, cmd, buffer, buffer_length);
+}
+
+static int pqi_report_phys_logical_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd, void **buffer)
+{
+	int rc;
+	size_t lun_list_length;
+	size_t lun_data_length;
+	size_t new_lun_list_length;
+	void *lun_data = NULL;
+	struct report_lun_header *report_lun_header;
+
+	report_lun_header = kmalloc(sizeof(*report_lun_header), GFP_KERNEL);
+	if (!report_lun_header) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	rc = pqi_report_luns(ctrl_info, cmd, report_lun_header, sizeof(*report_lun_header));
+	if (rc)
+		goto out;
+
+	lun_list_length = get_unaligned_be32(&report_lun_header->list_length);
+
+again:
+	lun_data_length = sizeof(struct report_lun_header) + lun_list_length;
+
+	lun_data = kmalloc(lun_data_length, GFP_KERNEL);
+	if (!lun_data) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	if (lun_list_length == 0) {
+		memcpy(lun_data, report_lun_header, sizeof(*report_lun_header));
+		goto out;
+	}
+
+	rc = pqi_report_luns(ctrl_info, cmd, lun_data, lun_data_length);
+	if (rc)
+		goto out;
+
+	new_lun_list_length =
+		get_unaligned_be32(&((struct report_lun_header *)lun_data)->list_length);
+
+	if (new_lun_list_length > lun_list_length) {
+		lun_list_length = new_lun_list_length;
+		kfree(lun_data);
+		goto again;
+	}
+
+out:
+	kfree(report_lun_header);
+
+	if (rc) {
+		kfree(lun_data);
+		lun_data = NULL;
+	}
+
+	*buffer = lun_data;
+
+	return rc;
+}
+
+static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info, void **buffer)
+{
+	int rc;
+	unsigned int i;
+	u8 rpl_response_format;
+	u32 num_physicals;
+	size_t rpl_16byte_wwid_list_length;
+	void *rpl_list;
+	struct report_lun_header *rpl_header;
+	struct report_phys_lun_8byte_wwid_list *rpl_8byte_wwid_list;
+	struct report_phys_lun_16byte_wwid_list *rpl_16byte_wwid_list;
+
+	rc = pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS, &rpl_list);
+	if (rc)
+		return rc;
+
+	if (ctrl_info->rpl_extended_format_4_5_supported) {
+		rpl_header = rpl_list;
+		rpl_response_format = rpl_header->flags & CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_MASK;
+		if (rpl_response_format == CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_4) {
+			*buffer = rpl_list;
+			return 0;
+		} else if (rpl_response_format != CISS_REPORT_PHYS_FLAG_EXTENDED_FORMAT_2) {
+			dev_err(&ctrl_info->pci_dev->dev,
+				"RPL returned unsupported data format %u\n",
+				rpl_response_format);
+			return -EINVAL;
+		} else {
+			dev_warn(&ctrl_info->pci_dev->dev,
+				"RPL returned extended format 2 instead of 4\n");
+		}
+	}
+
+	rpl_8byte_wwid_list = rpl_list;
+	num_physicals = get_unaligned_be32(&rpl_8byte_wwid_list->header.list_length) / sizeof(rpl_8byte_wwid_list->lun_entries[0]);
+	rpl_16byte_wwid_list_length = sizeof(struct report_lun_header) + (num_physicals * sizeof(struct report_phys_lun_16byte_wwid));
+
+	rpl_16byte_wwid_list = kmalloc(rpl_16byte_wwid_list_length, GFP_KERNEL);
+	if (!rpl_16byte_wwid_list)
+		return -ENOMEM;
+
+	put_unaligned_be32(num_physicals * sizeof(struct report_phys_lun_16byte_wwid),
+		&rpl_16byte_wwid_list->header.list_length);
+	rpl_16byte_wwid_list->header.flags = rpl_8byte_wwid_list->header.flags;
+
+	for (i = 0; i < num_physicals; i++) {
+		memcpy(&rpl_16byte_wwid_list->lun_entries[i].lunid, &rpl_8byte_wwid_list->lun_entries[i].lunid, sizeof(rpl_8byte_wwid_list->lun_entries[i].lunid));
+		memcpy(&rpl_16byte_wwid_list->lun_entries[i].wwid[0], &rpl_8byte_wwid_list->lun_entries[i].wwid, sizeof(rpl_8byte_wwid_list->lun_entries[i].wwid));
+		memset(&rpl_16byte_wwid_list->lun_entries[i].wwid[8], 0, 8);
+		rpl_16byte_wwid_list->lun_entries[i].device_type = rpl_8byte_wwid_list->lun_entries[i].device_type;
+		rpl_16byte_wwid_list->lun_entries[i].device_flags = rpl_8byte_wwid_list->lun_entries[i].device_flags;
+		rpl_16byte_wwid_list->lun_entries[i].lun_count = rpl_8byte_wwid_list->lun_entries[i].lun_count;
+		rpl_16byte_wwid_list->lun_entries[i].redundant_paths = rpl_8byte_wwid_list->lun_entries[i].redundant_paths;
+		rpl_16byte_wwid_list->lun_entries[i].aio_handle = rpl_8byte_wwid_list->lun_entries[i].aio_handle;
+	}
+
+	kfree(rpl_8byte_wwid_list);
+	*buffer = rpl_16byte_wwid_list;
+
+	return 0;
+}
+
+static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info, void **buffer)
+{
+	return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_LOG, buffer);
+}
+
+static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
+	struct report_phys_lun_16byte_wwid_list **physdev_list,
+	struct report_log_lun_list **logdev_list)
+{
+	int rc;
+	size_t logdev_list_length;
+	size_t logdev_data_length;
+	struct report_log_lun_list *internal_logdev_list;
+	struct report_log_lun_list *logdev_data;
+	struct report_lun_header report_lun_header;
+
+	rc = pqi_report_phys_luns(ctrl_info, (void **)physdev_list);
+	if (rc)
+		dev_err(&ctrl_info->pci_dev->dev,
+			"report physical LUNs failed\n");
+
+	rc = pqi_report_logical_luns(ctrl_info, (void **)logdev_list);
+	if (rc)
+		dev_err(&ctrl_info->pci_dev->dev,
+			"report logical LUNs failed\n");
+
+	/*
+	 * Tack the controller itself onto the end of the logical device list.
+	 */
+
+	logdev_data = *logdev_list;
+
+	if (logdev_data) {
+		logdev_list_length =
+			get_unaligned_be32(&logdev_data->header.list_length);
+	} else {
+		memset(&report_lun_header, 0, sizeof(report_lun_header));
+		logdev_data =
+			(struct report_log_lun_list *)&report_lun_header;
+		logdev_list_length = 0;
+	}
+
+	logdev_data_length = sizeof(struct report_lun_header) +
+		logdev_list_length;
+
+	internal_logdev_list = kmalloc(logdev_data_length +
+		sizeof(struct report_log_lun), GFP_KERNEL);
+	if (!internal_logdev_list) {
+		kfree(*logdev_list);
+		*logdev_list = NULL;
+		return -ENOMEM;
+	}
+
+	memcpy(internal_logdev_list, logdev_data, logdev_data_length);
+	memset((u8 *)internal_logdev_list + logdev_data_length, 0,
+		sizeof(struct report_log_lun));
+	put_unaligned_be32(logdev_list_length +
+		sizeof(struct report_log_lun),
+		&internal_logdev_list->header.list_length);
+
+	kfree(*logdev_list);
+	*logdev_list = internal_logdev_list;
+
+	return 0;
+}
+
+static inline void pqi_set_bus_target_lun(struct pqi_scsi_dev *device,
+	int bus, int target, int lun)
+{
+	device->bus = bus;
+	device->target = target;
+	device->lun = lun;
+}
+
+static void pqi_assign_bus_target_lun(struct pqi_scsi_dev *device)
+{
+	u8 *scsi3addr;
+	u32 lunid;
+	int bus;
+	int target;
+	int lun;
+
+	scsi3addr = device->scsi3addr;
+	lunid = get_unaligned_le32(scsi3addr);
+
+	if (pqi_is_hba_lunid(scsi3addr)) {
+		/* The specified device is the controller. */
+		pqi_set_bus_target_lun(device, PQI_HBA_BUS, 0, lunid & 0x3fff);
+		device->target_lun_valid = true;
+		return;
+	}
+
+	if (pqi_is_logical_device(device)) {
+		if (device->is_external_raid_device) {
+			bus = PQI_EXTERNAL_RAID_VOLUME_BUS;
+			target = (lunid >> 16) & 0x3fff;
+			lun = lunid & 0xff;
+		} else {
+			bus = PQI_RAID_VOLUME_BUS;
+			target = 0;
+			lun = lunid & 0x3fff;
+		}
+		pqi_set_bus_target_lun(device, bus, target, lun);
+		device->target_lun_valid = true;
+		return;
+	}
+
+	/*
+	 * Defer target and LUN assignment for non-controller physical devices
+	 * because the SAS transport layer will make these assignments later.
+	 */
+	pqi_set_bus_target_lun(device, PQI_PHYSICAL_DEVICE_BUS, 0, 0);
+}
+
+static void pqi_get_raid_level(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device)
+{
+	int rc;
+	u8 raid_level;
+	u8 *buffer;
+
+	raid_level = SA_RAID_UNKNOWN;
+
+	buffer = kmalloc(64, GFP_KERNEL);
+	if (buffer) {
+		rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
+			VPD_PAGE | CISS_VPD_LV_DEVICE_GEOMETRY, buffer, 64);
+		if (rc == 0) {
+			raid_level = buffer[8];
+			if (raid_level > SA_RAID_MAX)
+				raid_level = SA_RAID_UNKNOWN;
+		}
+		kfree(buffer);
+	}
+
+	device->raid_level = raid_level;
+}
+
+static int pqi_validate_raid_map(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device, struct raid_map *raid_map)
+{
+	char *err_msg;
+	u32 raid_map_size;
+	u32 r5or6_blocks_per_row;
+
+	raid_map_size = get_unaligned_le32(&raid_map->structure_size);
+
+	if (raid_map_size < offsetof(struct raid_map, disk_data)) {
+		err_msg = "RAID map too small";
+		goto bad_raid_map;
+	}
+
+	if (device->raid_level == SA_RAID_1) {
+		if (get_unaligned_le16(&raid_map->layout_map_count) != 2) {
+			err_msg = "invalid RAID-1 map";
+			goto bad_raid_map;
+		}
+	} else if (device->raid_level == SA_RAID_TRIPLE) {
+		if (get_unaligned_le16(&raid_map->layout_map_count) != 3) {
+			err_msg = "invalid RAID-1(Triple) map";
+			goto bad_raid_map;
+		}
+	} else if ((device->raid_level == SA_RAID_5 ||
+		device->raid_level == SA_RAID_6) &&
+		get_unaligned_le16(&raid_map->layout_map_count) > 1) {
+		/* RAID 50/60 */
+		r5or6_blocks_per_row =
+			get_unaligned_le16(&raid_map->strip_size) *
+			get_unaligned_le16(&raid_map->data_disks_per_row);
+		if (r5or6_blocks_per_row == 0) {
+			err_msg = "invalid RAID-5 or RAID-6 map";
+			goto bad_raid_map;
+		}
+	}
+
+	return 0;
+
+bad_raid_map:
+	dev_warn(&ctrl_info->pci_dev->dev,
+		"logical device %08x%08x %s\n",
+		*((u32 *)&device->scsi3addr),
+		*((u32 *)&device->scsi3addr[4]), err_msg);
+
+	return -EINVAL;
+}
+
+static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device)
+{
+	int rc;
+	u32 raid_map_size;
+	struct raid_map *raid_map;
+
+	raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL);
+	if (!raid_map)
+		return -ENOMEM;
+
+	rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
+		device->scsi3addr, raid_map, sizeof(*raid_map), 0, NULL);
+	if (rc)
+		goto error;
+
+	raid_map_size = get_unaligned_le32(&raid_map->structure_size);
+
+	if (raid_map_size > sizeof(*raid_map)) {
+
+		kfree(raid_map);
+
+		raid_map = kmalloc(raid_map_size, GFP_KERNEL);
+		if (!raid_map)
+			return -ENOMEM;
+
+		rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
+			device->scsi3addr, raid_map, raid_map_size, 0, NULL);
+		if (rc)
+			goto error;
+
+		if (get_unaligned_le32(&raid_map->structure_size)
+			!= raid_map_size) {
+			dev_warn(&ctrl_info->pci_dev->dev,
+				"requested %u bytes, received %u bytes\n",
+				raid_map_size,
+				get_unaligned_le32(&raid_map->structure_size));
+			rc = -EINVAL;
+			goto error;
+		}
+	}
+
+	rc = pqi_validate_raid_map(ctrl_info, device, raid_map);
+	if (rc)
+		goto error;
+
+	device->raid_map = raid_map;
+
+	return 0;
+
+error:
+	kfree(raid_map);
+
+	return rc;
+}
+
+static void pqi_set_max_transfer_encrypted(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device)
+{
+	if (!ctrl_info->lv_drive_type_mix_valid) {
+		device->max_transfer_encrypted = ~0;
+		return;
+	}
+
+	switch (LV_GET_DRIVE_TYPE_MIX(device->scsi3addr)) {
+	case LV_DRIVE_TYPE_MIX_SAS_HDD_ONLY:
+	case LV_DRIVE_TYPE_MIX_SATA_HDD_ONLY:
+	case LV_DRIVE_TYPE_MIX_SAS_OR_SATA_SSD_ONLY:
+	case LV_DRIVE_TYPE_MIX_SAS_SSD_ONLY:
+	case LV_DRIVE_TYPE_MIX_SATA_SSD_ONLY:
+	case LV_DRIVE_TYPE_MIX_SAS_ONLY:
+	case LV_DRIVE_TYPE_MIX_SATA_ONLY:
+		device->max_transfer_encrypted =
+			ctrl_info->max_transfer_encrypted_sas_sata;
+		break;
+	case LV_DRIVE_TYPE_MIX_NVME_ONLY:
+		device->max_transfer_encrypted =
+			ctrl_info->max_transfer_encrypted_nvme;
+		break;
+	case LV_DRIVE_TYPE_MIX_UNKNOWN:
+	case LV_DRIVE_TYPE_MIX_NO_RESTRICTION:
+	default:
+		device->max_transfer_encrypted =
+			min(ctrl_info->max_transfer_encrypted_sas_sata,
+				ctrl_info->max_transfer_encrypted_nvme);
+		break;
+	}
+}
+
+static void pqi_get_raid_bypass_status(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device)
+{
+	int rc;
+	u8 *buffer;
+	u8 bypass_status;
+
+	buffer = kmalloc(64, GFP_KERNEL);
+	if (!buffer)
+		return;
+
+	rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
+		VPD_PAGE | CISS_VPD_LV_BYPASS_STATUS, buffer, 64);
+	if (rc)
+		goto out;
+
+#define RAID_BYPASS_STATUS		4
+#define RAID_BYPASS_CONFIGURED		0x1
+#define RAID_BYPASS_ENABLED		0x2
+
+	bypass_status = buffer[RAID_BYPASS_STATUS];
+	device->raid_bypass_configured =
+		(bypass_status & RAID_BYPASS_CONFIGURED) != 0;
+	if (device->raid_bypass_configured &&
+		(bypass_status & RAID_BYPASS_ENABLED) &&
+		pqi_get_raid_map(ctrl_info, device) == 0) {
+		device->raid_bypass_enabled = true;
+		if (get_unaligned_le16(&device->raid_map->flags) &
+			RAID_MAP_ENCRYPTION_ENABLED)
+			pqi_set_max_transfer_encrypted(ctrl_info, device);
+	}
+
+out:
+	kfree(buffer);
+}
+
+/*
+ * Use vendor-specific VPD to determine online/offline status of a volume.
+ */
+
+static void pqi_get_volume_status(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device)
+{
+	int rc;
+	size_t page_length;
+	u8 volume_status = CISS_LV_STATUS_UNAVAILABLE;
+	bool volume_offline = true;
+	u32 volume_flags;
+	struct ciss_vpd_logical_volume_status *vpd;
+
+	vpd = kmalloc(sizeof(*vpd), GFP_KERNEL);
+	if (!vpd)
+		goto no_buffer;
+
+	rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
+		VPD_PAGE | CISS_VPD_LV_STATUS, vpd, sizeof(*vpd));
+	if (rc)
+		goto out;
+
+	if (vpd->page_code != CISS_VPD_LV_STATUS)
+		goto out;
+
+	page_length = offsetof(struct ciss_vpd_logical_volume_status,
+		volume_status) + vpd->page_length;
+	if (page_length < sizeof(*vpd))
+		goto out;
+
+	volume_status = vpd->volume_status;
+	volume_flags = get_unaligned_be32(&vpd->flags);
+	volume_offline = (volume_flags & CISS_LV_FLAGS_NO_HOST_IO) != 0;
+
+out:
+	kfree(vpd);
+no_buffer:
+	device->volume_status = volume_status;
+	device->volume_offline = volume_offline;
+}
+
+#define PQI_DEVICE_NCQ_PRIO_SUPPORTED	0x01
+#define PQI_DEVICE_PHY_MAP_SUPPORTED	0x10
+
+static int pqi_get_physical_device_info(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device,
+	struct bmic_identify_physical_device *id_phys)
+{
+	int rc;
+
+	memset(id_phys, 0, sizeof(*id_phys));
+
+	rc = pqi_identify_physical_device(ctrl_info, device,
+		id_phys, sizeof(*id_phys));
+	if (rc) {
+		device->queue_depth = PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH;
+		return rc;
+	}
+
+	scsi_sanitize_inquiry_string(&id_phys->model[0], 8);
+	scsi_sanitize_inquiry_string(&id_phys->model[8], 16);
+
+	memcpy(device->vendor, &id_phys->model[0], sizeof(device->vendor));
+	memcpy(device->model, &id_phys->model[8], sizeof(device->model));
+
+	device->box_index = id_phys->box_index;
+	device->phys_box_on_bus = id_phys->phys_box_on_bus;
+	device->phy_connected_dev_type = id_phys->phy_connected_dev_type[0];
+	device->queue_depth =
+		get_unaligned_le16(&id_phys->current_queue_depth_limit);
+	device->active_path_index = id_phys->active_path_number;
+	device->path_map = id_phys->redundant_path_present_map;
+	memcpy(&device->box,
+		&id_phys->alternate_paths_phys_box_on_port,
+		sizeof(device->box));
+	memcpy(&device->phys_connector,
+		&id_phys->alternate_paths_phys_connector,
+		sizeof(device->phys_connector));
+	device->bay = id_phys->phys_bay_in_box;
+	device->lun_count = id_phys->multi_lun_device_lun_count;
+	if ((id_phys->even_more_flags & PQI_DEVICE_PHY_MAP_SUPPORTED) &&
+		id_phys->phy_count)
+		device->phy_id =
+			id_phys->phy_to_phy_map[device->active_path_index];
+	else
+		device->phy_id = 0xFF;
+
+	device->ncq_prio_support =
+		((get_unaligned_le32(&id_phys->misc_drive_flags) >> 16) &
+		PQI_DEVICE_NCQ_PRIO_SUPPORTED);
+
+	return 0;
+}
+
+static int pqi_get_logical_device_info(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device)
+{
+	int rc;
+	u8 *buffer;
+
+	buffer = kmalloc(64, GFP_KERNEL);
+	if (!buffer)
+		return -ENOMEM;
+
+	/* Send an inquiry to the device to see what it is. */
+	rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, 0, buffer, 64);
+	if (rc)
+		goto out;
+
+	scsi_sanitize_inquiry_string(&buffer[8], 8);
+	scsi_sanitize_inquiry_string(&buffer[16], 16);
+
+	device->devtype = buffer[0] & 0x1f;
+	memcpy(device->vendor, &buffer[8], sizeof(device->vendor));
+	memcpy(device->model, &buffer[16], sizeof(device->model));
+
+	if (device->devtype == TYPE_DISK) {
+		if (device->is_external_raid_device) {
+			device->raid_level = SA_RAID_UNKNOWN;
+			device->volume_status = CISS_LV_OK;
+			device->volume_offline = false;
+		} else {
+			pqi_get_raid_level(ctrl_info, device);
+			pqi_get_raid_bypass_status(ctrl_info, device);
+			pqi_get_volume_status(ctrl_info, device);
+		}
+	}
+
+out:
+	kfree(buffer);
+
+	return rc;
+}
+
+/*
+ * Prevent adding drive to OS for some corner cases such as a drive
+ * undergoing a sanitize operation. Some OSes will continue to poll
+ * the drive until the sanitize completes, which can take hours,
+ * resulting in long bootup delays. Commands such as TUR, READ_CAP
+ * are allowed, but READ/WRITE cause check condition. So the OS
+ * cannot check/read the partition table.
+ * Note: devices that have completed sanitize must be re-enabled
+ *       using the management utility.
+ */
+static bool pqi_keep_device_offline(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device)
+{
+	u8 scsi_status;
+	int rc;
+	enum dma_data_direction dir;
+	char *buffer;
+	int buffer_length = 64;
+	size_t sense_data_length;
+	struct scsi_sense_hdr sshdr;
+	struct pqi_raid_path_request request;
+	struct pqi_raid_error_info error_info;
+	bool offline = false; /* Assume keep online */
+
+	/* Do not check controllers. */
+	if (pqi_is_hba_lunid(device->scsi3addr))
+		return false;
+
+	/* Do not check LVs. */
+	if (pqi_is_logical_device(device))
+		return false;
+
+	buffer = kmalloc(buffer_length, GFP_KERNEL);
+	if (!buffer)
+		return false; /* Assume not offline */
+
+	/* Check for SANITIZE in progress using TUR */
+	rc = pqi_build_raid_path_request(ctrl_info, &request,
+		TEST_UNIT_READY, RAID_CTLR_LUNID, buffer,
+		buffer_length, 0, &dir);
+	if (rc)
+		goto out; /* Assume not offline */
+
+	memcpy(request.lun_number, device->scsi3addr, sizeof(request.lun_number));
+
+	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, &error_info);
+
+	if (rc)
+		goto out; /* Assume not offline */
+
+	scsi_status = error_info.status;
+	sense_data_length = get_unaligned_le16(&error_info.sense_data_length);
+	if (sense_data_length == 0)
+		sense_data_length =
+			get_unaligned_le16(&error_info.response_data_length);
+	if (sense_data_length) {
+		if (sense_data_length > sizeof(error_info.data))
+			sense_data_length = sizeof(error_info.data);
+
+		/*
+		 * Check for sanitize in progress: asc:0x04, ascq: 0x1b
+		 */
+		if (scsi_status == SAM_STAT_CHECK_CONDITION &&
+			scsi_normalize_sense(error_info.data,
+				sense_data_length, &sshdr) &&
+				sshdr.sense_key == NOT_READY &&
+				sshdr.asc == 0x04 &&
+				sshdr.ascq == 0x1b) {
+			device->device_offline = true;
+			offline = true;
+			goto out; /* Keep device offline */
+		}
+	}
+
+out:
+	kfree(buffer);
+	return offline;
+}
+
+static int pqi_get_device_info_phys_logical(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device,
+	struct bmic_identify_physical_device *id_phys)
+{
+	int rc;
+
+	if (device->is_expander_smp_device)
+		return 0;
+
+	if (pqi_is_logical_device(device))
+		rc = pqi_get_logical_device_info(ctrl_info, device);
+	else
+		rc = pqi_get_physical_device_info(ctrl_info, device, id_phys);
+
+	return rc;
+}
+
+static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device,
+	struct bmic_identify_physical_device *id_phys)
+{
+	int rc;
+
+	rc = pqi_get_device_info_phys_logical(ctrl_info, device, id_phys);
+
+	if (rc == 0 && device->lun_count == 0)
+		device->lun_count = 1;
+
+	return rc;
+}
+
+static void pqi_show_volume_status(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device)
+{
+	char *status;
+	static const char unknown_state_str[] =
+		"Volume is in an unknown state (%u)";
+	char unknown_state_buffer[sizeof(unknown_state_str) + 10];
+
+	switch (device->volume_status) {
+	case CISS_LV_OK:
+		status = "Volume online";
+		break;
+	case CISS_LV_FAILED:
+		status = "Volume failed";
+		break;
+	case CISS_LV_NOT_CONFIGURED:
+		status = "Volume not configured";
+		break;
+	case CISS_LV_DEGRADED:
+		status = "Volume degraded";
+		break;
+	case CISS_LV_READY_FOR_RECOVERY:
+		status = "Volume ready for recovery operation";
+		break;
+	case CISS_LV_UNDERGOING_RECOVERY:
+		status = "Volume undergoing recovery";
+		break;
+	case CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED:
+		status = "Wrong physical drive was replaced";
+		break;
+	case CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM:
+		status = "A physical drive not properly connected";
+		break;
+	case CISS_LV_HARDWARE_OVERHEATING:
+		status = "Hardware is overheating";
+		break;
+	case CISS_LV_HARDWARE_HAS_OVERHEATED:
+		status = "Hardware has overheated";
+		break;
+	case CISS_LV_UNDERGOING_EXPANSION:
+		status = "Volume undergoing expansion";
+		break;
+	case CISS_LV_NOT_AVAILABLE:
+		status = "Volume waiting for transforming volume";
+		break;
+	case CISS_LV_QUEUED_FOR_EXPANSION:
+		status = "Volume queued for expansion";
+		break;
+	case CISS_LV_DISABLED_SCSI_ID_CONFLICT:
+		status = "Volume disabled due to SCSI ID conflict";
+		break;
+	case CISS_LV_EJECTED:
+		status = "Volume has been ejected";
+		break;
+	case CISS_LV_UNDERGOING_ERASE:
+		status = "Volume undergoing background erase";
+		break;
+	case CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD:
+		status = "Volume ready for predictive spare rebuild";
+		break;
+	case CISS_LV_UNDERGOING_RPI:
+		status = "Volume undergoing rapid parity initialization";
+		break;
+	case CISS_LV_PENDING_RPI:
+		status = "Volume queued for rapid parity initialization";
+		break;
+	case CISS_LV_ENCRYPTED_NO_KEY:
+		status = "Encrypted volume inaccessible - key not present";
+		break;
+	case CISS_LV_UNDERGOING_ENCRYPTION:
+		status = "Volume undergoing encryption process";
+		break;
+	case CISS_LV_UNDERGOING_ENCRYPTION_REKEYING:
+		status = "Volume undergoing encryption re-keying process";
+		break;
+	case CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
+		status = "Volume encrypted but encryption is disabled";
+		break;
+	case CISS_LV_PENDING_ENCRYPTION:
+		status = "Volume pending migration to encrypted state";
+		break;
+	case CISS_LV_PENDING_ENCRYPTION_REKEYING:
+		status = "Volume pending encryption rekeying";
+		break;
+	case CISS_LV_NOT_SUPPORTED:
+		status = "Volume not supported on this controller";
+		break;
+	case CISS_LV_STATUS_UNAVAILABLE:
+		status = "Volume status not available";
+		break;
+	default:
+		snprintf(unknown_state_buffer, sizeof(unknown_state_buffer),
+			unknown_state_str, device->volume_status);
+		status = unknown_state_buffer;
+		break;
+	}
+
+	dev_info(&ctrl_info->pci_dev->dev,
+		"scsi %d:%d:%d:%d %s\n",
+		ctrl_info->scsi_host->host_no,
+		device->bus, device->target, device->lun, status);
+}
+
+static void pqi_rescan_worker(struct work_struct *work)
+{
+	struct pqi_ctrl_info *ctrl_info;
+
+	ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
+		rescan_work);
+
+	pqi_scan_scsi_devices(ctrl_info);
+}
+
+static int pqi_add_device(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device)
+{
+	int rc;
+
+	if (pqi_is_logical_device(device))
+		rc = scsi_add_device(ctrl_info->scsi_host, device->bus,
+			device->target, device->lun);
+	else
+		rc = pqi_add_sas_device(ctrl_info->sas_host, device);
+
+	return rc;
+}
+
+#define PQI_REMOVE_DEVICE_PENDING_IO_TIMEOUT_MSECS	(20 * 1000)
+
+static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *device)
+{
+	int rc;
+	int lun;
+
+	for (lun = 0; lun < device->lun_count; lun++) {
+		rc = pqi_device_wait_for_pending_io(ctrl_info, device, lun,
+			PQI_REMOVE_DEVICE_PENDING_IO_TIMEOUT_MSECS);
+		if (rc)
+			dev_err(&ctrl_info->pci_dev->dev,
+				"scsi %d:%d:%d:%d removing device with %d outstanding command(s)\n",
+				ctrl_info->scsi_host->host_no, device->bus,
+				device->target, lun,
+				atomic_read(&device->scsi_cmds_outstanding[lun]));
+	}
+
+	if (pqi_is_logical_device(device))
+		scsi_remove_device(device->sdev);
+	else
+		pqi_remove_sas_device(device);
+
+	pqi_device_remove_start(device);
+}
+
+/* Assumes the SCSI device list lock is held. */
+
+static struct pqi_scsi_dev *pqi_find_scsi_dev(struct pqi_ctrl_info *ctrl_info,
+	int bus, int target, int lun)
+{
+	struct pqi_scsi_dev *device;
+
+	list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry)
+		if (device->bus == bus && device->target == target && device->lun == lun)
+			return device;
+
+	return NULL;
+}
+
+static inline bool pqi_device_equal(struct pqi_scsi_dev *dev1, struct pqi_scsi_dev *dev2)
+{
+	if (dev1->is_physical_device != dev2->is_physical_device)
+		return false;
+
+	if (dev1->is_physical_device)
+		return memcmp(dev1->wwid, dev2->wwid, sizeof(dev1->wwid)) == 0;
+
+	return memcmp(dev1->volume_id, dev2->volume_id, sizeof(dev1->volume_id)) == 0;
+}
+
+enum pqi_find_result {
+	DEVICE_NOT_FOUND,
+	DEVICE_CHANGED,
+	DEVICE_SAME,
+};
+
+static enum pqi_find_result pqi_scsi_find_entry(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device_to_find, struct pqi_scsi_dev **matching_device)
+{
+	struct pqi_scsi_dev *device;
+
+	list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry) {
+		if (pqi_scsi3addr_equal(device_to_find->scsi3addr, device->scsi3addr)) {
+			*matching_device = device;
+			if (pqi_device_equal(device_to_find, device)) {
+				if (device_to_find->volume_offline)
+					return DEVICE_CHANGED;
+				return DEVICE_SAME;
+			}
+			return DEVICE_CHANGED;
+		}
+	}
+
+	return DEVICE_NOT_FOUND;
+}
+
+static inline const char *pqi_device_type(struct pqi_scsi_dev *device)
+{
+	if (device->is_expander_smp_device)
+		return "Enclosure SMP    ";
+
+	return scsi_device_type(device->devtype);
+}
+
+#define PQI_DEV_INFO_BUFFER_LENGTH	128
+
+static void pqi_dev_info(struct pqi_ctrl_info *ctrl_info,
+	char *action, struct pqi_scsi_dev *device)
+{
+	ssize_t count;
+	char buffer[PQI_DEV_INFO_BUFFER_LENGTH];
+
+	count = scnprintf(buffer, PQI_DEV_INFO_BUFFER_LENGTH,
+		"%d:%d:", ctrl_info->scsi_host->host_no, device->bus);
+
+	if (device->target_lun_valid)
+		count += scnprintf(buffer + count,
+			PQI_DEV_INFO_BUFFER_LENGTH - count,
+			"%d:%d",
+			device->target,
+			device->lun);
+	else
+		count += scnprintf(buffer + count,
+			PQI_DEV_INFO_BUFFER_LENGTH - count,
+			"-:-");
+
+	if (pqi_is_logical_device(device))
+		count += scnprintf(buffer + count,
+			PQI_DEV_INFO_BUFFER_LENGTH - count,
+			" %08x%08x",
+			*((u32 *)&device->scsi3addr),
+			*((u32 *)&device->scsi3addr[4]));
+	else
+		count += scnprintf(buffer + count,
+			PQI_DEV_INFO_BUFFER_LENGTH - count,
+			" %016llx%016llx",
+			get_unaligned_be64(&device->wwid[0]),
+			get_unaligned_be64(&device->wwid[8]));
+
+	count += scnprintf(buffer + count, PQI_DEV_INFO_BUFFER_LENGTH - count,
+		" %s %.8s %.16s ",
+		pqi_device_type(device),
+		device->vendor,
+		device->model);
+
+	if (pqi_is_logical_device(device)) {
+		if (device->devtype == TYPE_DISK)
+			count += scnprintf(buffer + count,
+				PQI_DEV_INFO_BUFFER_LENGTH - count,
+				"SSDSmartPathCap%c En%c %-12s",
+				device->raid_bypass_configured ? '+' : '-',
+				device->raid_bypass_enabled ? '+' : '-',
+				pqi_raid_level_to_string(device->raid_level));
+	} else {
+		count += scnprintf(buffer + count,
+			PQI_DEV_INFO_BUFFER_LENGTH - count,
+			"AIO%c", device->aio_enabled ? '+' : '-');
+		if (device->devtype == TYPE_DISK ||
+			device->devtype == TYPE_ZBC)
+			count += scnprintf(buffer + count,
+				PQI_DEV_INFO_BUFFER_LENGTH - count,
+				" qd=%-6d", device->queue_depth);
+	}
+
+	dev_info(&ctrl_info->pci_dev->dev, "%s %s\n", action, buffer);
+}
+
+static bool pqi_raid_maps_equal(struct raid_map *raid_map1, struct raid_map *raid_map2)
+{
+	u32 raid_map1_size;
+	u32 raid_map2_size;
+
+	if (raid_map1 == NULL || raid_map2 == NULL)
+		return raid_map1 == raid_map2;
+
+	raid_map1_size = get_unaligned_le32(&raid_map1->structure_size);
+	raid_map2_size = get_unaligned_le32(&raid_map2->structure_size);
+
+	if (raid_map1_size != raid_map2_size)
+		return false;
+
+	return memcmp(raid_map1, raid_map2, raid_map1_size) == 0;
+}
+
+/* Assumes the SCSI device list lock is held. */
+
+static void pqi_scsi_update_device(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *existing_device, struct pqi_scsi_dev *new_device)
+{
+	existing_device->device_type = new_device->device_type;
+	existing_device->bus = new_device->bus;
+	if (new_device->target_lun_valid) {
+		existing_device->target = new_device->target;
+		existing_device->lun = new_device->lun;
+		existing_device->target_lun_valid = true;
+	}
+
+	/* By definition, the scsi3addr and wwid fields are already the same. */
+
+	existing_device->is_physical_device = new_device->is_physical_device;
+	memcpy(existing_device->vendor, new_device->vendor, sizeof(existing_device->vendor));
+	memcpy(existing_device->model, new_device->model, sizeof(existing_device->model));
+	existing_device->sas_address = new_device->sas_address;
+	existing_device->queue_depth = new_device->queue_depth;
+	existing_device->device_offline = false;
+	existing_device->lun_count = new_device->lun_count;
+
+	if (pqi_is_logical_device(existing_device)) {
+		existing_device->is_external_raid_device = new_device->is_external_raid_device;
+
+		if (existing_device->devtype == TYPE_DISK) {
+			existing_device->raid_level = new_device->raid_level;
+			existing_device->volume_status = new_device->volume_status;
+			if (ctrl_info->logical_volume_rescan_needed)
+				existing_device->rescan = true;
+			memset(existing_device->next_bypass_group, 0, sizeof(existing_device->next_bypass_group));
+			if (!pqi_raid_maps_equal(existing_device->raid_map, new_device->raid_map)) {
+				kfree(existing_device->raid_map);
+				existing_device->raid_map = new_device->raid_map;
+				/* To prevent this from being freed later. */
+				new_device->raid_map = NULL;
+			}
+			existing_device->raid_bypass_configured = new_device->raid_bypass_configured;
+			existing_device->raid_bypass_enabled = new_device->raid_bypass_enabled;
+		}
+	} else {
+		existing_device->aio_enabled = new_device->aio_enabled;
+		existing_device->aio_handle = new_device->aio_handle;
+		existing_device->is_expander_smp_device = new_device->is_expander_smp_device;
+		existing_device->active_path_index = new_device->active_path_index;
+		existing_device->phy_id = new_device->phy_id;
+		existing_device->path_map = new_device->path_map;
+		existing_device->bay = new_device->bay;
+		existing_device->box_index = new_device->box_index;
+		existing_device->phys_box_on_bus = new_device->phys_box_on_bus;
+		existing_device->phy_connected_dev_type = new_device->phy_connected_dev_type;
+		memcpy(existing_device->box, new_device->box, sizeof(existing_device->box));
+		memcpy(existing_device->phys_connector, new_device->phys_connector, sizeof(existing_device->phys_connector));
+	}
+}
+
+static inline void pqi_free_device(struct pqi_scsi_dev *device)
+{
+	if (device) {
+		kfree(device->raid_map);
+		kfree(device);
+	}
+}
+
+/*
+ * Called when exposing a new device to the OS fails in order to re-adjust
+ * our internal SCSI device list to match the SCSI ML's view.
+ */
+
+static inline void pqi_fixup_botched_add(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+	list_del(&device->scsi_device_list_entry);
+	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+	/* Allow the device structure to be freed later. */
+	device->keep_device = false;
+}
+
+static inline bool pqi_is_device_added(struct pqi_scsi_dev *device)
+{
+	if (device->is_expander_smp_device)
+		return device->sas_port != NULL;
+
+	return device->sdev != NULL;
+}
+
+static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *new_device_list[], unsigned int num_new_devices)
+{
+	int rc;
+	unsigned int i;
+	unsigned long flags;
+	enum pqi_find_result find_result;
+	struct pqi_scsi_dev *device;
+	struct pqi_scsi_dev *next;
+	struct pqi_scsi_dev *matching_device;
+	LIST_HEAD(add_list);
+	LIST_HEAD(delete_list);
+
+	/*
+	 * The idea here is to do as little work as possible while holding the
+	 * spinlock.  That's why we go to great pains to defer anything other
+	 * than updating the internal device list until after we release the
+	 * spinlock.
+	 */
+
+	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+
+	/* Assume that all devices in the existing list have gone away. */
+	list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry)
+		device->device_gone = true;
+
+	for (i = 0; i < num_new_devices; i++) {
+		device = new_device_list[i];
+
+		find_result = pqi_scsi_find_entry(ctrl_info, device,
+			&matching_device);
+
+		switch (find_result) {
+		case DEVICE_SAME:
+			/*
+			 * The newly found device is already in the existing
+			 * device list.
+			 */
+			device->new_device = false;
+			matching_device->device_gone = false;
+			pqi_scsi_update_device(ctrl_info, matching_device, device);
+			break;
+		case DEVICE_NOT_FOUND:
+			/*
+			 * The newly found device is NOT in the existing device
+			 * list.
+			 */
+			device->new_device = true;
+			break;
+		case DEVICE_CHANGED:
+			/*
+			 * The original device has gone away and we need to add
+			 * the new device.
+			 */
+			device->new_device = true;
+			break;
+		}
+	}
+
+	/* Process all devices that have gone away. */
+	list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
+		scsi_device_list_entry) {
+		if (device->device_gone) {
+			list_del(&device->scsi_device_list_entry);
+			list_add_tail(&device->delete_list_entry, &delete_list);
+		}
+	}
+
+	/* Process all new devices. */
+	for (i = 0; i < num_new_devices; i++) {
+		device = new_device_list[i];
+		if (!device->new_device)
+			continue;
+		if (device->volume_offline)
+			continue;
+		list_add_tail(&device->scsi_device_list_entry,
+			&ctrl_info->scsi_device_list);
+		list_add_tail(&device->add_list_entry, &add_list);
+		/* To prevent this device structure from being freed later. */
+		device->keep_device = true;
+	}
+
+	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+	/*
+	 * If OFA is in progress and there are devices that need to be deleted,
+	 * allow any pending reset operations to continue and unblock any SCSI
+	 * requests before removal.
+	 */
+	if (pqi_ofa_in_progress(ctrl_info)) {
+		list_for_each_entry_safe(device, next, &delete_list, delete_list_entry)
+			if (pqi_is_device_added(device))
+				pqi_device_remove_start(device);
+		pqi_ctrl_unblock_device_reset(ctrl_info);
+		pqi_scsi_unblock_requests(ctrl_info);
+	}
+
+	/* Remove all devices that have gone away. */
+	list_for_each_entry_safe(device, next, &delete_list, delete_list_entry) {
+		if (device->volume_offline) {
+			pqi_dev_info(ctrl_info, "offline", device);
+			pqi_show_volume_status(ctrl_info, device);
+		} else {
+			pqi_dev_info(ctrl_info, "removed", device);
+		}
+		if (pqi_is_device_added(device))
+			pqi_remove_device(ctrl_info, device);
+		list_del(&device->delete_list_entry);
+		pqi_free_device(device);
+	}
+
+	/*
+	 * Notify the SML of any existing device changes such as;
+	 * queue depth, device size.
+	 */
+	list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry) {
+		if (device->sdev && device->queue_depth != device->advertised_queue_depth) {
+			device->advertised_queue_depth = device->queue_depth;
+			scsi_change_queue_depth(device->sdev, device->advertised_queue_depth);
+			if (device->rescan) {
+				scsi_rescan_device(device->sdev);
+				device->rescan = false;
+			}
+		}
+	}
+
+	/* Expose any new devices. */
+	list_for_each_entry_safe(device, next, &add_list, add_list_entry) {
+		if (!pqi_is_device_added(device)) {
+			rc = pqi_add_device(ctrl_info, device);
+			if (rc == 0) {
+				pqi_dev_info(ctrl_info, "added", device);
+			} else {
+				dev_warn(&ctrl_info->pci_dev->dev,
+					"scsi %d:%d:%d:%d addition failed, device not added\n",
+					ctrl_info->scsi_host->host_no,
+					device->bus, device->target,
+					device->lun);
+				pqi_fixup_botched_add(ctrl_info, device);
+			}
+		}
+	}
+
+	ctrl_info->logical_volume_rescan_needed = false;
+
+}
+
+static inline bool pqi_is_supported_device(struct pqi_scsi_dev *device)
+{
+	/*
+	 * Only support the HBA controller itself as a RAID
+	 * controller.  If it's a RAID controller other than
+	 * the HBA itself (an external RAID controller, for
+	 * example), we don't support it.
+	 */
+	if (device->device_type == SA_DEVICE_TYPE_CONTROLLER &&
+		!pqi_is_hba_lunid(device->scsi3addr))
+			return false;
+
+	return true;
+}
+
+static inline bool pqi_skip_device(u8 *scsi3addr)
+{
+	/* Ignore all masked devices. */
+	if (MASKED_DEVICE(scsi3addr))
+		return true;
+
+	return false;
+}
+
+static inline void pqi_mask_device(u8 *scsi3addr)
+{
+	scsi3addr[3] |= 0xc0;
+}
+
+static inline bool pqi_is_multipath_device(struct pqi_scsi_dev *device)
+{
+	if (pqi_is_logical_device(device))
+		return false;
+
+	return (device->path_map & (device->path_map - 1)) != 0;
+}
+
+static inline bool pqi_expose_device(struct pqi_scsi_dev *device)
+{
+	return !device->is_physical_device || !pqi_skip_device(device->scsi3addr);
+}
+
+static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
+{
+	int i;
+	int rc;
+	LIST_HEAD(new_device_list_head);
+	struct report_phys_lun_16byte_wwid_list *physdev_list = NULL;
+	struct report_log_lun_list *logdev_list = NULL;
+	struct report_phys_lun_16byte_wwid *phys_lun;
+	struct report_log_lun *log_lun;
+	struct bmic_identify_physical_device *id_phys = NULL;
+	u32 num_physicals;
+	u32 num_logicals;
+	struct pqi_scsi_dev **new_device_list = NULL;
+	struct pqi_scsi_dev *device;
+	struct pqi_scsi_dev *next;
+	unsigned int num_new_devices;
+	unsigned int num_valid_devices;
+	bool is_physical_device;
+	u8 *scsi3addr;
+	unsigned int physical_index;
+	unsigned int logical_index;
+	static char *out_of_memory_msg =
+		"failed to allocate memory, device discovery stopped";
+
+	rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list);
+	if (rc)
+		goto out;
+
+	if (physdev_list)
+		num_physicals =
+			get_unaligned_be32(&physdev_list->header.list_length)
+				/ sizeof(physdev_list->lun_entries[0]);
+	else
+		num_physicals = 0;
+
+	if (logdev_list)
+		num_logicals =
+			get_unaligned_be32(&logdev_list->header.list_length)
+				/ sizeof(logdev_list->lun_entries[0]);
+	else
+		num_logicals = 0;
+
+	if (num_physicals) {
+		/*
+		 * We need this buffer for calls to pqi_get_physical_disk_info()
+		 * below.  We allocate it here instead of inside
+		 * pqi_get_physical_disk_info() because it's a fairly large
+		 * buffer.
+		 */
+		id_phys = kmalloc(sizeof(*id_phys), GFP_KERNEL);
+		if (!id_phys) {
+			dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
+				out_of_memory_msg);
+			rc = -ENOMEM;
+			goto out;
+		}
+
+		if (pqi_hide_vsep) {
+			for (i = num_physicals - 1; i >= 0; i--) {
+				phys_lun = &physdev_list->lun_entries[i];
+				if (CISS_GET_DRIVE_NUMBER(phys_lun->lunid) == PQI_VSEP_CISS_BTL) {
+					pqi_mask_device(phys_lun->lunid);
+					break;
+				}
+			}
+		}
+	}
+
+	if (num_logicals &&
+		(logdev_list->header.flags & CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX))
+		ctrl_info->lv_drive_type_mix_valid = true;
+
+	num_new_devices = num_physicals + num_logicals;
+
+	new_device_list = kmalloc_array(num_new_devices,
+					sizeof(*new_device_list),
+					GFP_KERNEL);
+	if (!new_device_list) {
+		dev_warn(&ctrl_info->pci_dev->dev, "%s\n", out_of_memory_msg);
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	for (i = 0; i < num_new_devices; i++) {
+		device = kzalloc(sizeof(*device), GFP_KERNEL);
+		if (!device) {
+			dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
+				out_of_memory_msg);
+			rc = -ENOMEM;
+			goto out;
+		}
+		list_add_tail(&device->new_device_list_entry,
+			&new_device_list_head);
+	}
+
+	device = NULL;
+	num_valid_devices = 0;
+	physical_index = 0;
+	logical_index = 0;
+
+	for (i = 0; i < num_new_devices; i++) {
+
+		if ((!pqi_expose_ld_first && i < num_physicals) ||
+			(pqi_expose_ld_first && i >= num_logicals)) {
+			is_physical_device = true;
+			phys_lun = &physdev_list->lun_entries[physical_index++];
+			log_lun = NULL;
+			scsi3addr = phys_lun->lunid;
+		} else {
+			is_physical_device = false;
+			phys_lun = NULL;
+			log_lun = &logdev_list->lun_entries[logical_index++];
+			scsi3addr = log_lun->lunid;
+		}
+
+		if (is_physical_device && pqi_skip_device(scsi3addr))
+			continue;
+
+		if (device)
+			device = list_next_entry(device, new_device_list_entry);
+		else
+			device = list_first_entry(&new_device_list_head,
+				struct pqi_scsi_dev, new_device_list_entry);
+
+		memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
+		device->is_physical_device = is_physical_device;
+		if (is_physical_device) {
+			device->device_type = phys_lun->device_type;
+			if (device->device_type == SA_DEVICE_TYPE_EXPANDER_SMP)
+				device->is_expander_smp_device = true;
+		} else {
+			device->is_external_raid_device =
+				pqi_is_external_raid_addr(scsi3addr);
+		}
+
+		if (!pqi_is_supported_device(device))
+			continue;
+
+		/* Do not present disks that the OS cannot fully probe */
+		if (pqi_keep_device_offline(ctrl_info, device))
+			continue;
+
+		/* Gather information about the device. */
+		rc = pqi_get_device_info(ctrl_info, device, id_phys);
+		if (rc == -ENOMEM) {
+			dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
+				out_of_memory_msg);
+			goto out;
+		}
+		if (rc) {
+			if (device->is_physical_device)
+				dev_warn(&ctrl_info->pci_dev->dev,
+					"obtaining device info failed, skipping physical device %016llx%016llx\n",
+					get_unaligned_be64(&phys_lun->wwid[0]),
+					get_unaligned_be64(&phys_lun->wwid[8]));
+			else
+				dev_warn(&ctrl_info->pci_dev->dev,
+					"obtaining device info failed, skipping logical device %08x%08x\n",
+					*((u32 *)&device->scsi3addr),
+					*((u32 *)&device->scsi3addr[4]));
+			rc = 0;
+			continue;
+		}
+
+		pqi_assign_bus_target_lun(device);
+
+		if (device->is_physical_device) {
+			memcpy(device->wwid, phys_lun->wwid, sizeof(device->wwid));
+			if ((phys_lun->device_flags &
+				CISS_REPORT_PHYS_DEV_FLAG_AIO_ENABLED) &&
+				phys_lun->aio_handle) {
+					device->aio_enabled = true;
+					device->aio_handle =
+						phys_lun->aio_handle;
+			}
+		} else {
+			memcpy(device->volume_id, log_lun->volume_id,
+				sizeof(device->volume_id));
+		}
+
+		device->sas_address = get_unaligned_be64(&device->wwid[0]);
+
+		new_device_list[num_valid_devices++] = device;
+	}
+
+	pqi_update_device_list(ctrl_info, new_device_list, num_valid_devices);
+
+out:
+	list_for_each_entry_safe(device, next, &new_device_list_head,
+		new_device_list_entry) {
+		if (device->keep_device)
+			continue;
+		list_del(&device->new_device_list_entry);
+		pqi_free_device(device);
+	}
+
+	kfree(new_device_list);
+	kfree(physdev_list);
+	kfree(logdev_list);
+	kfree(id_phys);
+
+	return rc;
+}
+
+static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
+{
+	int rc;
+	int mutex_acquired;
+
+	if (pqi_ctrl_offline(ctrl_info))
+		return -ENXIO;
+
+	mutex_acquired = mutex_trylock(&ctrl_info->scan_mutex);
+
+	if (!mutex_acquired) {
+		if (pqi_ctrl_scan_blocked(ctrl_info))
+			return -EBUSY;
+		pqi_schedule_rescan_worker_delayed(ctrl_info);
+		return -EINPROGRESS;
+	}
+
+	rc = pqi_update_scsi_devices(ctrl_info);
+	if (rc && !pqi_ctrl_scan_blocked(ctrl_info))
+		pqi_schedule_rescan_worker_delayed(ctrl_info);
+
+	mutex_unlock(&ctrl_info->scan_mutex);
+
+	return rc;
+}
+
+static void pqi_scan_start(struct Scsi_Host *shost)
+{
+	struct pqi_ctrl_info *ctrl_info;
+
+	ctrl_info = shost_to_hba(shost);
+
+	pqi_scan_scsi_devices(ctrl_info);
+}
+
+/* Returns TRUE if scan is finished. */
+
+static int pqi_scan_finished(struct Scsi_Host *shost,
+	unsigned long elapsed_time)
+{
+	struct pqi_ctrl_info *ctrl_info;
+
+	ctrl_info = shost_priv(shost);
+
+	return !mutex_is_locked(&ctrl_info->scan_mutex);
+}
+
+static inline void pqi_set_encryption_info(struct pqi_encryption_info *encryption_info,
+	struct raid_map *raid_map, u64 first_block)
+{
+	u32 volume_blk_size;
+
+	/*
+	 * Set the encryption tweak values based on logical block address.
+	 * If the block size is 512, the tweak value is equal to the LBA.
+	 * For other block sizes, tweak value is (LBA * block size) / 512.
+	 */
+	volume_blk_size = get_unaligned_le32(&raid_map->volume_blk_size);
+	if (volume_blk_size != 512)
+		first_block = (first_block * volume_blk_size) / 512;
+
+	encryption_info->data_encryption_key_index =
+		get_unaligned_le16(&raid_map->data_encryption_key_index);
+	encryption_info->encrypt_tweak_lower = lower_32_bits(first_block);
+	encryption_info->encrypt_tweak_upper = upper_32_bits(first_block);
+}
+
+/*
+ * Attempt to perform RAID bypass mapping for a logical volume I/O.
+ */
+
+static bool pqi_aio_raid_level_supported(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev_raid_map_data *rmd)
+{
+	bool is_supported = true;
+
+	switch (rmd->raid_level) {
+	case SA_RAID_0:
+		break;
+	case SA_RAID_1:
+		if (rmd->is_write && (!ctrl_info->enable_r1_writes ||
+			rmd->data_length > ctrl_info->max_write_raid_1_10_2drive))
+			is_supported = false;
+		break;
+	case SA_RAID_TRIPLE:
+		if (rmd->is_write && (!ctrl_info->enable_r1_writes ||
+			rmd->data_length > ctrl_info->max_write_raid_1_10_3drive))
+			is_supported = false;
+		break;
+	case SA_RAID_5:
+		if (rmd->is_write && (!ctrl_info->enable_r5_writes ||
+			rmd->data_length > ctrl_info->max_write_raid_5_6))
+			is_supported = false;
+		break;
+	case SA_RAID_6:
+		if (rmd->is_write && (!ctrl_info->enable_r6_writes ||
+			rmd->data_length > ctrl_info->max_write_raid_5_6))
+			is_supported = false;
+		break;
+	default:
+		is_supported = false;
+		break;
+	}
+
+	return is_supported;
+}
+
+#define PQI_RAID_BYPASS_INELIGIBLE	1
+
+static int pqi_get_aio_lba_and_block_count(struct scsi_cmnd *scmd,
+	struct pqi_scsi_dev_raid_map_data *rmd)
+{
+	/* Check for valid opcode, get LBA and block count. */
+	switch (scmd->cmnd[0]) {
+	case WRITE_6:
+		rmd->is_write = true;
+		fallthrough;
+	case READ_6:
+		rmd->first_block = (u64)(((scmd->cmnd[1] & 0x1f) << 16) |
+			(scmd->cmnd[2] << 8) | scmd->cmnd[3]);
+		rmd->block_cnt = (u32)scmd->cmnd[4];
+		if (rmd->block_cnt == 0)
+			rmd->block_cnt = 256;
+		break;
+	case WRITE_10:
+		rmd->is_write = true;
+		fallthrough;
+	case READ_10:
+		rmd->first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
+		rmd->block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]);
+		break;
+	case WRITE_12:
+		rmd->is_write = true;
+		fallthrough;
+	case READ_12:
+		rmd->first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
+		rmd->block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
+		break;
+	case WRITE_16:
+		rmd->is_write = true;
+		fallthrough;
+	case READ_16:
+		rmd->first_block = get_unaligned_be64(&scmd->cmnd[2]);
+		rmd->block_cnt = get_unaligned_be32(&scmd->cmnd[10]);
+		break;
+	default:
+		/* Process via normal I/O path. */
+		return PQI_RAID_BYPASS_INELIGIBLE;
+	}
+
+	put_unaligned_le32(scsi_bufflen(scmd), &rmd->data_length);
+
+	return 0;
+}
+
+static int pci_get_aio_common_raid_map_values(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev_raid_map_data *rmd, struct raid_map *raid_map)
+{
+#if BITS_PER_LONG == 32
+	u64 tmpdiv;
+#endif
+
+	rmd->last_block = rmd->first_block + rmd->block_cnt - 1;
+
+	/* Check for invalid block or wraparound. */
+	if (rmd->last_block >=
+		get_unaligned_le64(&raid_map->volume_blk_cnt) ||
+		rmd->last_block < rmd->first_block)
+		return PQI_RAID_BYPASS_INELIGIBLE;
+
+	rmd->data_disks_per_row =
+		get_unaligned_le16(&raid_map->data_disks_per_row);
+	rmd->strip_size = get_unaligned_le16(&raid_map->strip_size);
+	rmd->layout_map_count = get_unaligned_le16(&raid_map->layout_map_count);
+
+	/* Calculate stripe information for the request. */
+	rmd->blocks_per_row = rmd->data_disks_per_row * rmd->strip_size;
+	if (rmd->blocks_per_row == 0) /* Used as a divisor in many calculations */
+		return PQI_RAID_BYPASS_INELIGIBLE;
+#if BITS_PER_LONG == 32
+	tmpdiv = rmd->first_block;
+	do_div(tmpdiv, rmd->blocks_per_row);
+	rmd->first_row = tmpdiv;
+	tmpdiv = rmd->last_block;
+	do_div(tmpdiv, rmd->blocks_per_row);
+	rmd->last_row = tmpdiv;
+	rmd->first_row_offset = (u32)(rmd->first_block - (rmd->first_row * rmd->blocks_per_row));
+	rmd->last_row_offset = (u32)(rmd->last_block - (rmd->last_row * rmd->blocks_per_row));
+	tmpdiv = rmd->first_row_offset;
+	do_div(tmpdiv, rmd->strip_size);
+	rmd->first_column = tmpdiv;
+	tmpdiv = rmd->last_row_offset;
+	do_div(tmpdiv, rmd->strip_size);
+	rmd->last_column = tmpdiv;
+#else
+	rmd->first_row = rmd->first_block / rmd->blocks_per_row;
+	rmd->last_row = rmd->last_block / rmd->blocks_per_row;
+	rmd->first_row_offset = (u32)(rmd->first_block -
+		(rmd->first_row * rmd->blocks_per_row));
+	rmd->last_row_offset = (u32)(rmd->last_block - (rmd->last_row *
+		rmd->blocks_per_row));
+	rmd->first_column = rmd->first_row_offset / rmd->strip_size;
+	rmd->last_column = rmd->last_row_offset / rmd->strip_size;
+#endif
+
+	/* If this isn't a single row/column then give to the controller. */
+	if (rmd->first_row != rmd->last_row ||
+		rmd->first_column != rmd->last_column)
+		return PQI_RAID_BYPASS_INELIGIBLE;
+
+	/* Proceeding with driver mapping. */
+	rmd->total_disks_per_row = rmd->data_disks_per_row +
+		get_unaligned_le16(&raid_map->metadata_disks_per_row);
+	rmd->map_row = ((u32)(rmd->first_row >>
+		raid_map->parity_rotation_shift)) %
+		get_unaligned_le16(&raid_map->row_cnt);
+	rmd->map_index = (rmd->map_row * rmd->total_disks_per_row) +
+		rmd->first_column;
+
+	return 0;
+}
+
+static int pqi_calc_aio_r5_or_r6(struct pqi_scsi_dev_raid_map_data *rmd,
+	struct raid_map *raid_map)
+{
+#if BITS_PER_LONG == 32
+	u64 tmpdiv;
+#endif
+
+	if (rmd->blocks_per_row == 0) /* Used as a divisor in many calculations */
+		return PQI_RAID_BYPASS_INELIGIBLE;
+
+	/* RAID 50/60 */
+	/* Verify first and last block are in same RAID group. */
+	rmd->stripesize = rmd->blocks_per_row * rmd->layout_map_count;
+#if BITS_PER_LONG == 32
+	tmpdiv = rmd->first_block;
+	rmd->first_group = do_div(tmpdiv, rmd->stripesize);
+	tmpdiv = rmd->first_group;
+	do_div(tmpdiv, rmd->blocks_per_row);
+	rmd->first_group = tmpdiv;
+	tmpdiv = rmd->last_block;
+	rmd->last_group = do_div(tmpdiv, rmd->stripesize);
+	tmpdiv = rmd->last_group;
+	do_div(tmpdiv, rmd->blocks_per_row);
+	rmd->last_group = tmpdiv;
+#else
+	rmd->first_group = (rmd->first_block % rmd->stripesize) / rmd->blocks_per_row;
+	rmd->last_group = (rmd->last_block % rmd->stripesize) / rmd->blocks_per_row;
+#endif
+	if (rmd->first_group != rmd->last_group)
+		return PQI_RAID_BYPASS_INELIGIBLE;
+
+	/* Verify request is in a single row of RAID 5/6. */
+#if BITS_PER_LONG == 32
+	tmpdiv = rmd->first_block;
+	do_div(tmpdiv, rmd->stripesize);
+	rmd->first_row = tmpdiv;
+	rmd->r5or6_first_row = tmpdiv;
+	tmpdiv = rmd->last_block;
+	do_div(tmpdiv, rmd->stripesize);
+	rmd->r5or6_last_row = tmpdiv;
+#else
+	rmd->first_row = rmd->r5or6_first_row =
+		rmd->first_block / rmd->stripesize;
+	rmd->r5or6_last_row = rmd->last_block / rmd->stripesize;
+#endif
+	if (rmd->r5or6_first_row != rmd->r5or6_last_row)
+		return PQI_RAID_BYPASS_INELIGIBLE;
+
+	/* Verify request is in a single column. */
+#if BITS_PER_LONG == 32
+	tmpdiv = rmd->first_block;
+	rmd->first_row_offset = do_div(tmpdiv, rmd->stripesize);
+	tmpdiv = rmd->first_row_offset;
+	rmd->first_row_offset = (u32)do_div(tmpdiv, rmd->blocks_per_row);
+	rmd->r5or6_first_row_offset = rmd->first_row_offset;
+	tmpdiv = rmd->last_block;
+	rmd->r5or6_last_row_offset = do_div(tmpdiv, rmd->stripesize);
+	tmpdiv = rmd->r5or6_last_row_offset;
+	rmd->r5or6_last_row_offset = do_div(tmpdiv, rmd->blocks_per_row);
+	tmpdiv = rmd->r5or6_first_row_offset;
+	do_div(tmpdiv, rmd->strip_size);
+	rmd->first_column = rmd->r5or6_first_column = tmpdiv;
+	tmpdiv = rmd->r5or6_last_row_offset;
+	do_div(tmpdiv, rmd->strip_size);
+	rmd->r5or6_last_column = tmpdiv;
+#else
+	rmd->first_row_offset = rmd->r5or6_first_row_offset =
+		(u32)((rmd->first_block % rmd->stripesize) %
+		rmd->blocks_per_row);
+
+	rmd->r5or6_last_row_offset =
+		(u32)((rmd->last_block % rmd->stripesize) %
+		rmd->blocks_per_row);
+
+	rmd->first_column =
+		rmd->r5or6_first_row_offset / rmd->strip_size;
+	rmd->r5or6_first_column = rmd->first_column;
+	rmd->r5or6_last_column = rmd->r5or6_last_row_offset / rmd->strip_size;
+#endif
+	if (rmd->r5or6_first_column != rmd->r5or6_last_column)
+		return PQI_RAID_BYPASS_INELIGIBLE;
+
+	/* Request is eligible. */
+	rmd->map_row =
+		((u32)(rmd->first_row >> raid_map->parity_rotation_shift)) %
+		get_unaligned_le16(&raid_map->row_cnt);
+
+	rmd->map_index = (rmd->first_group *
+		(get_unaligned_le16(&raid_map->row_cnt) *
+		rmd->total_disks_per_row)) +
+		(rmd->map_row * rmd->total_disks_per_row) + rmd->first_column;
+
+	if (rmd->is_write) {
+		u32 index;
+
+		/*
+		 * p_parity_it_nexus and q_parity_it_nexus are pointers to the
+		 * parity entries inside the device's raid_map.
+		 *
+		 * A device's RAID map is bounded by: number of RAID disks squared.
+		 *
+		 * The devices RAID map size is checked during device
+		 * initialization.
+		 */
+		index = DIV_ROUND_UP(rmd->map_index + 1, rmd->total_disks_per_row);
+		index *= rmd->total_disks_per_row;
+		index -= get_unaligned_le16(&raid_map->metadata_disks_per_row);
+
+		rmd->p_parity_it_nexus = raid_map->disk_data[index].aio_handle;
+		if (rmd->raid_level == SA_RAID_6) {
+			rmd->q_parity_it_nexus = raid_map->disk_data[index + 1].aio_handle;
+			rmd->xor_mult = raid_map->disk_data[rmd->map_index].xor_mult[1];
+		}
+#if BITS_PER_LONG == 32
+		tmpdiv = rmd->first_block;
+		do_div(tmpdiv, rmd->blocks_per_row);
+		rmd->row = tmpdiv;
+#else
+		rmd->row = rmd->first_block / rmd->blocks_per_row;
+#endif
+	}
+
+	return 0;
+}
+
+static void pqi_set_aio_cdb(struct pqi_scsi_dev_raid_map_data *rmd)
+{
+	/* Build the new CDB for the physical disk I/O. */
+	if (rmd->disk_block > 0xffffffff) {
+		rmd->cdb[0] = rmd->is_write ? WRITE_16 : READ_16;
+		rmd->cdb[1] = 0;
+		put_unaligned_be64(rmd->disk_block, &rmd->cdb[2]);
+		put_unaligned_be32(rmd->disk_block_cnt, &rmd->cdb[10]);
+		rmd->cdb[14] = 0;
+		rmd->cdb[15] = 0;
+		rmd->cdb_length = 16;
+	} else {
+		rmd->cdb[0] = rmd->is_write ? WRITE_10 : READ_10;
+		rmd->cdb[1] = 0;
+		put_unaligned_be32((u32)rmd->disk_block, &rmd->cdb[2]);
+		rmd->cdb[6] = 0;
+		put_unaligned_be16((u16)rmd->disk_block_cnt, &rmd->cdb[7]);
+		rmd->cdb[9] = 0;
+		rmd->cdb_length = 10;
+	}
+}
+
+static void pqi_calc_aio_r1_nexus(struct raid_map *raid_map,
+	struct pqi_scsi_dev_raid_map_data *rmd)
+{
+	u32 index;
+	u32 group;
+
+	group = rmd->map_index / rmd->data_disks_per_row;
+
+	index = rmd->map_index - (group * rmd->data_disks_per_row);
+	rmd->it_nexus[0] = raid_map->disk_data[index].aio_handle;
+	index += rmd->data_disks_per_row;
+	rmd->it_nexus[1] = raid_map->disk_data[index].aio_handle;
+	if (rmd->layout_map_count > 2) {
+		index += rmd->data_disks_per_row;
+		rmd->it_nexus[2] = raid_map->disk_data[index].aio_handle;
+	}
+
+	rmd->num_it_nexus_entries = rmd->layout_map_count;
+}
+
+static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
+	struct pqi_queue_group *queue_group)
+{
+	int rc;
+	struct raid_map *raid_map;
+	u32 group;
+	u32 next_bypass_group;
+	struct pqi_encryption_info *encryption_info_ptr;
+	struct pqi_encryption_info encryption_info;
+	struct pqi_scsi_dev_raid_map_data rmd = { 0 };
+
+	rc = pqi_get_aio_lba_and_block_count(scmd, &rmd);
+	if (rc)
+		return PQI_RAID_BYPASS_INELIGIBLE;
+
+	rmd.raid_level = device->raid_level;
+
+	if (!pqi_aio_raid_level_supported(ctrl_info, &rmd))
+		return PQI_RAID_BYPASS_INELIGIBLE;
+
+	if (unlikely(rmd.block_cnt == 0))
+		return PQI_RAID_BYPASS_INELIGIBLE;
+
+	raid_map = device->raid_map;
+
+	rc = pci_get_aio_common_raid_map_values(ctrl_info, &rmd, raid_map);
+	if (rc)
+		return PQI_RAID_BYPASS_INELIGIBLE;
+
+	if (device->raid_level == SA_RAID_1 ||
+		device->raid_level == SA_RAID_TRIPLE) {
+		if (rmd.is_write) {
+			pqi_calc_aio_r1_nexus(raid_map, &rmd);
+		} else {
+			group = device->next_bypass_group[rmd.map_index];
+			next_bypass_group = group + 1;
+			if (next_bypass_group >= rmd.layout_map_count)
+				next_bypass_group = 0;
+			device->next_bypass_group[rmd.map_index] = next_bypass_group;
+			rmd.map_index += group * rmd.data_disks_per_row;
+		}
+	} else if ((device->raid_level == SA_RAID_5 ||
+		device->raid_level == SA_RAID_6) &&
+		(rmd.layout_map_count > 1 || rmd.is_write)) {
+		rc = pqi_calc_aio_r5_or_r6(&rmd, raid_map);
+		if (rc)
+			return PQI_RAID_BYPASS_INELIGIBLE;
+	}
+
+	if (unlikely(rmd.map_index >= RAID_MAP_MAX_ENTRIES))
+		return PQI_RAID_BYPASS_INELIGIBLE;
+
+	rmd.aio_handle = raid_map->disk_data[rmd.map_index].aio_handle;
+	rmd.disk_block = get_unaligned_le64(&raid_map->disk_starting_blk) +
+		rmd.first_row * rmd.strip_size +
+		(rmd.first_row_offset - rmd.first_column * rmd.strip_size);
+	rmd.disk_block_cnt = rmd.block_cnt;
+
+	/* Handle differing logical/physical block sizes. */
+	if (raid_map->phys_blk_shift) {
+		rmd.disk_block <<= raid_map->phys_blk_shift;
+		rmd.disk_block_cnt <<= raid_map->phys_blk_shift;
+	}
+
+	if (unlikely(rmd.disk_block_cnt > 0xffff))
+		return PQI_RAID_BYPASS_INELIGIBLE;
+
+	pqi_set_aio_cdb(&rmd);
+
+	if (get_unaligned_le16(&raid_map->flags) & RAID_MAP_ENCRYPTION_ENABLED) {
+		if (rmd.data_length > device->max_transfer_encrypted)
+			return PQI_RAID_BYPASS_INELIGIBLE;
+		pqi_set_encryption_info(&encryption_info, raid_map, rmd.first_block);
+		encryption_info_ptr = &encryption_info;
+	} else {
+		encryption_info_ptr = NULL;
+	}
+
+	if (rmd.is_write) {
+		switch (device->raid_level) {
+		case SA_RAID_1:
+		case SA_RAID_TRIPLE:
+			return pqi_aio_submit_r1_write_io(ctrl_info, scmd, queue_group,
+				encryption_info_ptr, device, &rmd);
+		case SA_RAID_5:
+		case SA_RAID_6:
+			return pqi_aio_submit_r56_write_io(ctrl_info, scmd, queue_group,
+				encryption_info_ptr, device, &rmd);
+		}
+	}
+
+	return pqi_aio_submit_io(ctrl_info, scmd, rmd.aio_handle,
+		rmd.cdb, rmd.cdb_length, queue_group,
+		encryption_info_ptr, true, false);
+}
+
+#define PQI_STATUS_IDLE		0x0
+
+#define PQI_CREATE_ADMIN_QUEUE_PAIR	1
+#define PQI_DELETE_ADMIN_QUEUE_PAIR	2
+
+#define PQI_DEVICE_STATE_POWER_ON_AND_RESET		0x0
+#define PQI_DEVICE_STATE_STATUS_AVAILABLE		0x1
+#define PQI_DEVICE_STATE_ALL_REGISTERS_READY		0x2
+#define PQI_DEVICE_STATE_ADMIN_QUEUE_PAIR_READY		0x3
+#define PQI_DEVICE_STATE_ERROR				0x4
+
+#define PQI_MODE_READY_TIMEOUT_SECS		30
+#define PQI_MODE_READY_POLL_INTERVAL_MSECS	1
+
+static int pqi_wait_for_pqi_mode_ready(struct pqi_ctrl_info *ctrl_info)
+{
+	struct pqi_device_registers __iomem *pqi_registers;
+	unsigned long timeout;
+	u64 signature;
+	u8 status;
+
+	pqi_registers = ctrl_info->pqi_registers;
+	timeout = (PQI_MODE_READY_TIMEOUT_SECS * HZ) + jiffies;
+
+	while (1) {
+		signature = readq(&pqi_registers->signature);
+		if (memcmp(&signature, PQI_DEVICE_SIGNATURE,
+			sizeof(signature)) == 0)
+			break;
+		if (time_after(jiffies, timeout)) {
+			dev_err(&ctrl_info->pci_dev->dev,
+				"timed out waiting for PQI signature\n");
+			return -ETIMEDOUT;
+		}
+		msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
+	}
+
+	while (1) {
+		status = readb(&pqi_registers->function_and_status_code);
+		if (status == PQI_STATUS_IDLE)
+			break;
+		if (time_after(jiffies, timeout)) {
+			dev_err(&ctrl_info->pci_dev->dev,
+				"timed out waiting for PQI IDLE\n");
+			return -ETIMEDOUT;
+		}
+		msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
+	}
+
+	while (1) {
+		if (readl(&pqi_registers->device_status) ==
+			PQI_DEVICE_STATE_ALL_REGISTERS_READY)
+			break;
+		if (time_after(jiffies, timeout)) {
+			dev_err(&ctrl_info->pci_dev->dev,
+				"timed out waiting for PQI all registers ready\n");
+			return -ETIMEDOUT;
+		}
+		msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
+	}
+
+	return 0;
+}
+
+static inline void pqi_aio_path_disabled(struct pqi_io_request *io_request)
+{
+	struct pqi_scsi_dev *device;
+
+	device = io_request->scmd->device->hostdata;
+	device->raid_bypass_enabled = false;
+	device->aio_enabled = false;
+}
+
+static inline void pqi_take_device_offline(struct scsi_device *sdev, char *path)
+{
+	struct pqi_ctrl_info *ctrl_info;
+	struct pqi_scsi_dev *device;
+
+	device = sdev->hostdata;
+	if (device->device_offline)
+		return;
+
+	device->device_offline = true;
+	ctrl_info = shost_to_hba(sdev->host);
+	pqi_schedule_rescan_worker(ctrl_info);
+	dev_err(&ctrl_info->pci_dev->dev, "re-scanning %s scsi %d:%d:%d:%d\n",
+		path, ctrl_info->scsi_host->host_no, device->bus,
+		device->target, device->lun);
+}
+
+static void pqi_process_raid_io_error(struct pqi_io_request *io_request)
+{
+	u8 scsi_status;
+	u8 host_byte;
+	struct scsi_cmnd *scmd;
+	struct pqi_raid_error_info *error_info;
+	size_t sense_data_length;
+	int residual_count;
+	int xfer_count;
+	struct scsi_sense_hdr sshdr;
+
+	scmd = io_request->scmd;
+	if (!scmd)
+		return;
+
+	error_info = io_request->error_info;
+	scsi_status = error_info->status;
+	host_byte = DID_OK;
+
+	switch (error_info->data_out_result) {
+	case PQI_DATA_IN_OUT_GOOD:
+		break;
+	case PQI_DATA_IN_OUT_UNDERFLOW:
+		xfer_count =
+			get_unaligned_le32(&error_info->data_out_transferred);
+		residual_count = scsi_bufflen(scmd) - xfer_count;
+		scsi_set_resid(scmd, residual_count);
+		if (xfer_count < scmd->underflow)
+			host_byte = DID_SOFT_ERROR;
+		break;
+	case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
+	case PQI_DATA_IN_OUT_ABORTED:
+		host_byte = DID_ABORT;
+		break;
+	case PQI_DATA_IN_OUT_TIMEOUT:
+		host_byte = DID_TIME_OUT;
+		break;
+	case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
+	case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
+	case PQI_DATA_IN_OUT_BUFFER_ERROR:
+	case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
+	case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
+	case PQI_DATA_IN_OUT_ERROR:
+	case PQI_DATA_IN_OUT_HARDWARE_ERROR:
+	case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
+	case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
+	case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
+	case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
+	case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
+	case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
+	case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
+	case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
+	case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
+	default:
+		host_byte = DID_ERROR;
+		break;
+	}
+
+	sense_data_length = get_unaligned_le16(&error_info->sense_data_length);
+	if (sense_data_length == 0)
+		sense_data_length =
+			get_unaligned_le16(&error_info->response_data_length);
+	if (sense_data_length) {
+		if (sense_data_length > sizeof(error_info->data))
+			sense_data_length = sizeof(error_info->data);
+
+		if (scsi_status == SAM_STAT_CHECK_CONDITION &&
+			scsi_normalize_sense(error_info->data,
+				sense_data_length, &sshdr) &&
+				sshdr.sense_key == HARDWARE_ERROR &&
+				sshdr.asc == 0x3e) {
+			struct pqi_ctrl_info *ctrl_info = shost_to_hba(scmd->device->host);
+			struct pqi_scsi_dev *device = scmd->device->hostdata;
+
+			switch (sshdr.ascq) {
+			case 0x1: /* LOGICAL UNIT FAILURE */
+				if (printk_ratelimit())
+					scmd_printk(KERN_ERR, scmd, "received 'logical unit failure' from controller for scsi %d:%d:%d:%d\n",
+						ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
+				pqi_take_device_offline(scmd->device, "RAID");
+				host_byte = DID_NO_CONNECT;
+				break;
+
+			default: /* See http://www.t10.org/lists/asc-num.htm#ASC_3E */
+				if (printk_ratelimit())
+					scmd_printk(KERN_ERR, scmd, "received unhandled error %d from controller for scsi %d:%d:%d:%d\n",
+						sshdr.ascq, ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
+				break;
+			}
+		}
+
+		if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
+			sense_data_length = SCSI_SENSE_BUFFERSIZE;
+		memcpy(scmd->sense_buffer, error_info->data,
+			sense_data_length);
+	}
+
+	scmd->result = scsi_status;
+	set_host_byte(scmd, host_byte);
+}
+
+static void pqi_process_aio_io_error(struct pqi_io_request *io_request)
+{
+	u8 scsi_status;
+	u8 host_byte;
+	struct scsi_cmnd *scmd;
+	struct pqi_aio_error_info *error_info;
+	size_t sense_data_length;
+	int residual_count;
+	int xfer_count;
+	bool device_offline;
+	struct pqi_scsi_dev *device;
+
+	scmd = io_request->scmd;
+	error_info = io_request->error_info;
+	host_byte = DID_OK;
+	sense_data_length = 0;
+	device_offline = false;
+	device = scmd->device->hostdata;
+
+	switch (error_info->service_response) {
+	case PQI_AIO_SERV_RESPONSE_COMPLETE:
+		scsi_status = error_info->status;
+		break;
+	case PQI_AIO_SERV_RESPONSE_FAILURE:
+		switch (error_info->status) {
+		case PQI_AIO_STATUS_IO_ABORTED:
+			scsi_status = SAM_STAT_TASK_ABORTED;
+			break;
+		case PQI_AIO_STATUS_UNDERRUN:
+			scsi_status = SAM_STAT_GOOD;
+			residual_count = get_unaligned_le32(
+						&error_info->residual_count);
+			scsi_set_resid(scmd, residual_count);
+			xfer_count = scsi_bufflen(scmd) - residual_count;
+			if (xfer_count < scmd->underflow)
+				host_byte = DID_SOFT_ERROR;
+			break;
+		case PQI_AIO_STATUS_OVERRUN:
+			scsi_status = SAM_STAT_GOOD;
+			break;
+		case PQI_AIO_STATUS_AIO_PATH_DISABLED:
+			pqi_aio_path_disabled(io_request);
+			if (pqi_is_multipath_device(device)) {
+				pqi_device_remove_start(device);
+				host_byte = DID_NO_CONNECT;
+				scsi_status = SAM_STAT_CHECK_CONDITION;
+			} else {
+				scsi_status = SAM_STAT_GOOD;
+				io_request->status = -EAGAIN;
+			}
+			break;
+		case PQI_AIO_STATUS_NO_PATH_TO_DEVICE:
+		case PQI_AIO_STATUS_INVALID_DEVICE:
+			if (!io_request->raid_bypass) {
+				device_offline = true;
+				pqi_take_device_offline(scmd->device, "AIO");
+				host_byte = DID_NO_CONNECT;
+			}
+			scsi_status = SAM_STAT_CHECK_CONDITION;
+			break;
+		case PQI_AIO_STATUS_IO_ERROR:
+		default:
+			scsi_status = SAM_STAT_CHECK_CONDITION;
+			break;
+		}
+		break;
+	case PQI_AIO_SERV_RESPONSE_TMF_COMPLETE:
+	case PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED:
+		scsi_status = SAM_STAT_GOOD;
+		break;
+	case PQI_AIO_SERV_RESPONSE_TMF_REJECTED:
+	case PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN:
+	default:
+		scsi_status = SAM_STAT_CHECK_CONDITION;
+		break;
+	}
+
+	if (error_info->data_present) {
+		sense_data_length =
+			get_unaligned_le16(&error_info->data_length);
+		if (sense_data_length) {
+			if (sense_data_length > sizeof(error_info->data))
+				sense_data_length = sizeof(error_info->data);
+			if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
+				sense_data_length = SCSI_SENSE_BUFFERSIZE;
+			memcpy(scmd->sense_buffer, error_info->data,
+				sense_data_length);
+		}
+	}
+
+	if (device_offline && sense_data_length == 0)
+		scsi_build_sense(scmd, 0, HARDWARE_ERROR, 0x3e, 0x1);
+
+	scmd->result = scsi_status;
+	set_host_byte(scmd, host_byte);
+}
+
+static void pqi_process_io_error(unsigned int iu_type,
+	struct pqi_io_request *io_request)
+{
+	switch (iu_type) {
+	case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
+		pqi_process_raid_io_error(io_request);
+		break;
+	case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
+		pqi_process_aio_io_error(io_request);
+		break;
+	}
+}
+
+static int pqi_interpret_task_management_response(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_task_management_response *response)
+{
+	int rc;
+
+	switch (response->response_code) {
+	case SOP_TMF_COMPLETE:
+	case SOP_TMF_FUNCTION_SUCCEEDED:
+		rc = 0;
+		break;
+	case SOP_TMF_REJECTED:
+		rc = -EAGAIN;
+		break;
+	case SOP_RC_INCORRECT_LOGICAL_UNIT:
+		rc = -ENODEV;
+		break;
+	default:
+		rc = -EIO;
+		break;
+	}
+
+	if (rc)
+		dev_err(&ctrl_info->pci_dev->dev,
+			"Task Management Function error: %d (response code: %u)\n", rc, response->response_code);
+
+	return rc;
+}
+
+static inline void pqi_invalid_response(struct pqi_ctrl_info *ctrl_info,
+	enum pqi_ctrl_shutdown_reason ctrl_shutdown_reason)
+{
+	pqi_take_ctrl_offline(ctrl_info, ctrl_shutdown_reason);
+}
+
+static int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info, struct pqi_queue_group *queue_group)
+{
+	int num_responses;
+	pqi_index_t oq_pi;
+	pqi_index_t oq_ci;
+	struct pqi_io_request *io_request;
+	struct pqi_io_response *response;
+	u16 request_id;
+
+	num_responses = 0;
+	oq_ci = queue_group->oq_ci_copy;
+
+	while (1) {
+		oq_pi = readl(queue_group->oq_pi);
+		if (oq_pi >= ctrl_info->num_elements_per_oq) {
+			pqi_invalid_response(ctrl_info, PQI_IO_PI_OUT_OF_RANGE);
+			dev_err(&ctrl_info->pci_dev->dev,
+				"I/O interrupt: producer index (%u) out of range (0-%u): consumer index: %u\n",
+				oq_pi, ctrl_info->num_elements_per_oq - 1, oq_ci);
+			return -1;
+		}
+		if (oq_pi == oq_ci)
+			break;
+
+		num_responses++;
+		response = queue_group->oq_element_array +
+			(oq_ci * PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
+
+		request_id = get_unaligned_le16(&response->request_id);
+		if (request_id >= ctrl_info->max_io_slots) {
+			pqi_invalid_response(ctrl_info, PQI_INVALID_REQ_ID);
+			dev_err(&ctrl_info->pci_dev->dev,
+				"request ID in response (%u) out of range (0-%u): producer index: %u  consumer index: %u\n",
+				request_id, ctrl_info->max_io_slots - 1, oq_pi, oq_ci);
+			return -1;
+		}
+
+		io_request = &ctrl_info->io_request_pool[request_id];
+		if (atomic_read(&io_request->refcount) == 0) {
+			pqi_invalid_response(ctrl_info, PQI_UNMATCHED_REQ_ID);
+			dev_err(&ctrl_info->pci_dev->dev,
+				"request ID in response (%u) does not match an outstanding I/O request: producer index: %u  consumer index: %u\n",
+				request_id, oq_pi, oq_ci);
+			return -1;
+		}
+
+		switch (response->header.iu_type) {
+		case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
+		case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
+			if (io_request->scmd)
+				io_request->scmd->result = 0;
+			fallthrough;
+		case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
+			break;
+		case PQI_RESPONSE_IU_VENDOR_GENERAL:
+			io_request->status =
+				get_unaligned_le16(
+				&((struct pqi_vendor_general_response *)response)->status);
+			break;
+		case PQI_RESPONSE_IU_TASK_MANAGEMENT:
+			io_request->status = pqi_interpret_task_management_response(ctrl_info,
+				(void *)response);
+			break;
+		case PQI_RESPONSE_IU_AIO_PATH_DISABLED:
+			pqi_aio_path_disabled(io_request);
+			io_request->status = -EAGAIN;
+			break;
+		case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
+		case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
+			io_request->error_info = ctrl_info->error_buffer +
+				(get_unaligned_le16(&response->error_index) *
+				PQI_ERROR_BUFFER_ELEMENT_LENGTH);
+			pqi_process_io_error(response->header.iu_type, io_request);
+			break;
+		default:
+			pqi_invalid_response(ctrl_info, PQI_UNEXPECTED_IU_TYPE);
+			dev_err(&ctrl_info->pci_dev->dev,
+				"unexpected IU type: 0x%x: producer index: %u  consumer index: %u\n",
+				response->header.iu_type, oq_pi, oq_ci);
+			return -1;
+		}
+
+		io_request->io_complete_callback(io_request, io_request->context);
+
+		/*
+		 * Note that the I/O request structure CANNOT BE TOUCHED after
+		 * returning from the I/O completion callback!
+		 */
+		oq_ci = (oq_ci + 1) % ctrl_info->num_elements_per_oq;
+	}
+
+	if (num_responses) {
+		queue_group->oq_ci_copy = oq_ci;
+		writel(oq_ci, queue_group->oq_ci);
+	}
+
+	return num_responses;
+}
+
+static inline unsigned int pqi_num_elements_free(unsigned int pi,
+	unsigned int ci, unsigned int elements_in_queue)
+{
+	unsigned int num_elements_used;
+
+	if (pi >= ci)
+		num_elements_used = pi - ci;
+	else
+		num_elements_used = elements_in_queue - ci + pi;
+
+	return elements_in_queue - num_elements_used - 1;
+}
+
+static void pqi_send_event_ack(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_event_acknowledge_request *iu, size_t iu_length)
+{
+	pqi_index_t iq_pi;
+	pqi_index_t iq_ci;
+	unsigned long flags;
+	void *next_element;
+	struct pqi_queue_group *queue_group;
+
+	queue_group = &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP];
+	put_unaligned_le16(queue_group->oq_id, &iu->header.response_queue_id);
+
+	while (1) {
+		spin_lock_irqsave(&queue_group->submit_lock[RAID_PATH], flags);
+
+		iq_pi = queue_group->iq_pi_copy[RAID_PATH];
+		iq_ci = readl(queue_group->iq_ci[RAID_PATH]);
+
+		if (pqi_num_elements_free(iq_pi, iq_ci,
+			ctrl_info->num_elements_per_iq))
+			break;
+
+		spin_unlock_irqrestore(
+			&queue_group->submit_lock[RAID_PATH], flags);
+
+		if (pqi_ctrl_offline(ctrl_info))
+			return;
+	}
+
+	next_element = queue_group->iq_element_array[RAID_PATH] +
+		(iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
+
+	memcpy(next_element, iu, iu_length);
+
+	iq_pi = (iq_pi + 1) % ctrl_info->num_elements_per_iq;
+	queue_group->iq_pi_copy[RAID_PATH] = iq_pi;
+
+	/*
+	 * This write notifies the controller that an IU is available to be
+	 * processed.
+	 */
+	writel(iq_pi, queue_group->iq_pi[RAID_PATH]);
+
+	spin_unlock_irqrestore(&queue_group->submit_lock[RAID_PATH], flags);
+}
+
+static void pqi_acknowledge_event(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_event *event)
+{
+	struct pqi_event_acknowledge_request request;
+
+	memset(&request, 0, sizeof(request));
+
+	request.header.iu_type = PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT;
+	put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
+		&request.header.iu_length);
+	request.event_type = event->event_type;
+	put_unaligned_le16(event->event_id, &request.event_id);
+	put_unaligned_le32(event->additional_event_id, &request.additional_event_id);
+
+	pqi_send_event_ack(ctrl_info, &request, sizeof(request));
+}
+
+#define PQI_SOFT_RESET_STATUS_TIMEOUT_SECS		30
+#define PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS	1
+
+static enum pqi_soft_reset_status pqi_poll_for_soft_reset_status(
+	struct pqi_ctrl_info *ctrl_info)
+{
+	u8 status;
+	unsigned long timeout;
+
+	timeout = (PQI_SOFT_RESET_STATUS_TIMEOUT_SECS * HZ) + jiffies;
+
+	while (1) {
+		status = pqi_read_soft_reset_status(ctrl_info);
+		if (status & PQI_SOFT_RESET_INITIATE)
+			return RESET_INITIATE_DRIVER;
+
+		if (status & PQI_SOFT_RESET_ABORT)
+			return RESET_ABORT;
+
+		if (!sis_is_firmware_running(ctrl_info))
+			return RESET_NORESPONSE;
+
+		if (time_after(jiffies, timeout)) {
+			dev_warn(&ctrl_info->pci_dev->dev,
+				"timed out waiting for soft reset status\n");
+			return RESET_TIMEDOUT;
+		}
+
+		ssleep(PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS);
+	}
+}
+
+static void pqi_process_soft_reset(struct pqi_ctrl_info *ctrl_info)
+{
+	int rc;
+	unsigned int delay_secs;
+	enum pqi_soft_reset_status reset_status;
+
+	if (ctrl_info->soft_reset_handshake_supported)
+		reset_status = pqi_poll_for_soft_reset_status(ctrl_info);
+	else
+		reset_status = RESET_INITIATE_FIRMWARE;
+
+	delay_secs = PQI_POST_RESET_DELAY_SECS;
+
+	switch (reset_status) {
+	case RESET_TIMEDOUT:
+		delay_secs = PQI_POST_OFA_RESET_DELAY_UPON_TIMEOUT_SECS;
+		fallthrough;
+	case RESET_INITIATE_DRIVER:
+		dev_info(&ctrl_info->pci_dev->dev,
+				"Online Firmware Activation: resetting controller\n");
+		sis_soft_reset(ctrl_info);
+		fallthrough;
+	case RESET_INITIATE_FIRMWARE:
+		ctrl_info->pqi_mode_enabled = false;
+		pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
+		rc = pqi_ofa_ctrl_restart(ctrl_info, delay_secs);
+		pqi_ofa_free_host_buffer(ctrl_info);
+		pqi_ctrl_ofa_done(ctrl_info);
+		dev_info(&ctrl_info->pci_dev->dev,
+				"Online Firmware Activation: %s\n",
+				rc == 0 ? "SUCCESS" : "FAILED");
+		break;
+	case RESET_ABORT:
+		dev_info(&ctrl_info->pci_dev->dev,
+				"Online Firmware Activation ABORTED\n");
+		if (ctrl_info->soft_reset_handshake_supported)
+			pqi_clear_soft_reset_status(ctrl_info);
+		pqi_ofa_free_host_buffer(ctrl_info);
+		pqi_ctrl_ofa_done(ctrl_info);
+		pqi_ofa_ctrl_unquiesce(ctrl_info);
+		break;
+	case RESET_NORESPONSE:
+		fallthrough;
+	default:
+		dev_err(&ctrl_info->pci_dev->dev,
+			"unexpected Online Firmware Activation reset status: 0x%x\n",
+			reset_status);
+		pqi_ofa_free_host_buffer(ctrl_info);
+		pqi_ctrl_ofa_done(ctrl_info);
+		pqi_ofa_ctrl_unquiesce(ctrl_info);
+		pqi_take_ctrl_offline(ctrl_info, PQI_OFA_RESPONSE_TIMEOUT);
+		break;
+	}
+}
+
+static void pqi_ofa_memory_alloc_worker(struct work_struct *work)
+{
+	struct pqi_ctrl_info *ctrl_info;
+
+	ctrl_info = container_of(work, struct pqi_ctrl_info, ofa_memory_alloc_work);
+
+	pqi_ctrl_ofa_start(ctrl_info);
+	pqi_ofa_setup_host_buffer(ctrl_info);
+	pqi_ofa_host_memory_update(ctrl_info);
+}
+
+static void pqi_ofa_quiesce_worker(struct work_struct *work)
+{
+	struct pqi_ctrl_info *ctrl_info;
+	struct pqi_event *event;
+
+	ctrl_info = container_of(work, struct pqi_ctrl_info, ofa_quiesce_work);
+
+	event = &ctrl_info->events[pqi_event_type_to_event_index(PQI_EVENT_TYPE_OFA)];
+
+	pqi_ofa_ctrl_quiesce(ctrl_info);
+	pqi_acknowledge_event(ctrl_info, event);
+	pqi_process_soft_reset(ctrl_info);
+}
+
+static bool pqi_ofa_process_event(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_event *event)
+{
+	bool ack_event;
+
+	ack_event = true;
+
+	switch (event->event_id) {
+	case PQI_EVENT_OFA_MEMORY_ALLOCATION:
+		dev_info(&ctrl_info->pci_dev->dev,
+			"received Online Firmware Activation memory allocation request\n");
+		schedule_work(&ctrl_info->ofa_memory_alloc_work);
+		break;
+	case PQI_EVENT_OFA_QUIESCE:
+		dev_info(&ctrl_info->pci_dev->dev,
+			"received Online Firmware Activation quiesce request\n");
+		schedule_work(&ctrl_info->ofa_quiesce_work);
+		ack_event = false;
+		break;
+	case PQI_EVENT_OFA_CANCELED:
+		dev_info(&ctrl_info->pci_dev->dev,
+			"received Online Firmware Activation cancel request: reason: %u\n",
+			ctrl_info->ofa_cancel_reason);
+		pqi_ofa_free_host_buffer(ctrl_info);
+		pqi_ctrl_ofa_done(ctrl_info);
+		break;
+	default:
+		dev_err(&ctrl_info->pci_dev->dev,
+			"received unknown Online Firmware Activation request: event ID: %u\n",
+			event->event_id);
+		break;
+	}
+
+	return ack_event;
+}
+
+static void pqi_disable_raid_bypass(struct pqi_ctrl_info *ctrl_info)
+{
+	unsigned long flags;
+	struct pqi_scsi_dev *device;
+
+	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+
+	list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry)
+		if (device->raid_bypass_enabled)
+			device->raid_bypass_enabled = false;
+
+	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+}
+
+static void pqi_event_worker(struct work_struct *work)
+{
+	unsigned int i;
+	bool rescan_needed;
+	struct pqi_ctrl_info *ctrl_info;
+	struct pqi_event *event;
+	bool ack_event;
+
+	ctrl_info = container_of(work, struct pqi_ctrl_info, event_work);
+
+	pqi_ctrl_busy(ctrl_info);
+	pqi_wait_if_ctrl_blocked(ctrl_info);
+	if (pqi_ctrl_offline(ctrl_info))
+		goto out;
+
+	rescan_needed = false;
+	event = ctrl_info->events;
+	for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
+		if (event->pending) {
+			event->pending = false;
+			if (event->event_type == PQI_EVENT_TYPE_OFA) {
+				ack_event = pqi_ofa_process_event(ctrl_info, event);
+			} else {
+				ack_event = true;
+				rescan_needed = true;
+				if (event->event_type == PQI_EVENT_TYPE_LOGICAL_DEVICE)
+					ctrl_info->logical_volume_rescan_needed = true;
+				else if (event->event_type == PQI_EVENT_TYPE_AIO_STATE_CHANGE)
+					pqi_disable_raid_bypass(ctrl_info);
+			}
+			if (ack_event)
+				pqi_acknowledge_event(ctrl_info, event);
+		}
+		event++;
+	}
+
+#define PQI_RESCAN_WORK_FOR_EVENT_DELAY		(5 * HZ)
+
+	if (rescan_needed)
+		pqi_schedule_rescan_worker_with_delay(ctrl_info,
+			PQI_RESCAN_WORK_FOR_EVENT_DELAY);
+
+out:
+	pqi_ctrl_unbusy(ctrl_info);
+}
+
+#define PQI_HEARTBEAT_TIMER_INTERVAL	(10 * HZ)
+
+static void pqi_heartbeat_timer_handler(struct timer_list *t)
+{
+	int num_interrupts;
+	u32 heartbeat_count;
+	struct pqi_ctrl_info *ctrl_info = from_timer(ctrl_info, t, heartbeat_timer);
+
+	pqi_check_ctrl_health(ctrl_info);
+	if (pqi_ctrl_offline(ctrl_info))
+		return;
+
+	num_interrupts = atomic_read(&ctrl_info->num_interrupts);
+	heartbeat_count = pqi_read_heartbeat_counter(ctrl_info);
+
+	if (num_interrupts == ctrl_info->previous_num_interrupts) {
+		if (heartbeat_count == ctrl_info->previous_heartbeat_count) {
+			dev_err(&ctrl_info->pci_dev->dev,
+				"no heartbeat detected - last heartbeat count: %u\n",
+				heartbeat_count);
+			pqi_take_ctrl_offline(ctrl_info, PQI_NO_HEARTBEAT);
+			return;
+		}
+	} else {
+		ctrl_info->previous_num_interrupts = num_interrupts;
+	}
+
+	ctrl_info->previous_heartbeat_count = heartbeat_count;
+	mod_timer(&ctrl_info->heartbeat_timer,
+		jiffies + PQI_HEARTBEAT_TIMER_INTERVAL);
+}
+
+static void pqi_start_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
+{
+	if (!ctrl_info->heartbeat_counter)
+		return;
+
+	ctrl_info->previous_num_interrupts =
+		atomic_read(&ctrl_info->num_interrupts);
+	ctrl_info->previous_heartbeat_count =
+		pqi_read_heartbeat_counter(ctrl_info);
+
+	ctrl_info->heartbeat_timer.expires =
+		jiffies + PQI_HEARTBEAT_TIMER_INTERVAL;
+	add_timer(&ctrl_info->heartbeat_timer);
+}
+
+static inline void pqi_stop_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
+{
+	del_timer_sync(&ctrl_info->heartbeat_timer);
+}
+
+static void pqi_ofa_capture_event_payload(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_event *event, struct pqi_event_response *response)
+{
+	switch (event->event_id) {
+	case PQI_EVENT_OFA_MEMORY_ALLOCATION:
+		ctrl_info->ofa_bytes_requested =
+			get_unaligned_le32(&response->data.ofa_memory_allocation.bytes_requested);
+		break;
+	case PQI_EVENT_OFA_CANCELED:
+		ctrl_info->ofa_cancel_reason =
+			get_unaligned_le16(&response->data.ofa_cancelled.reason);
+		break;
+	}
+}
+
+static int pqi_process_event_intr(struct pqi_ctrl_info *ctrl_info)
+{
+	int num_events;
+	pqi_index_t oq_pi;
+	pqi_index_t oq_ci;
+	struct pqi_event_queue *event_queue;
+	struct pqi_event_response *response;
+	struct pqi_event *event;
+	int event_index;
+
+	event_queue = &ctrl_info->event_queue;
+	num_events = 0;
+	oq_ci = event_queue->oq_ci_copy;
+
+	while (1) {
+		oq_pi = readl(event_queue->oq_pi);
+		if (oq_pi >= PQI_NUM_EVENT_QUEUE_ELEMENTS) {
+			pqi_invalid_response(ctrl_info, PQI_EVENT_PI_OUT_OF_RANGE);
+			dev_err(&ctrl_info->pci_dev->dev,
+				"event interrupt: producer index (%u) out of range (0-%u): consumer index: %u\n",
+				oq_pi, PQI_NUM_EVENT_QUEUE_ELEMENTS - 1, oq_ci);
+			return -1;
+		}
+
+		if (oq_pi == oq_ci)
+			break;
+
+		num_events++;
+		response = event_queue->oq_element_array + (oq_ci * PQI_EVENT_OQ_ELEMENT_LENGTH);
+
+		event_index = pqi_event_type_to_event_index(response->event_type);
+
+		if (event_index >= 0 && response->request_acknowledge) {
+			event = &ctrl_info->events[event_index];
+			event->pending = true;
+			event->event_type = response->event_type;
+			event->event_id = get_unaligned_le16(&response->event_id);
+			event->additional_event_id =
+				get_unaligned_le32(&response->additional_event_id);
+			if (event->event_type == PQI_EVENT_TYPE_OFA)
+				pqi_ofa_capture_event_payload(ctrl_info, event, response);
+		}
+
+		oq_ci = (oq_ci + 1) % PQI_NUM_EVENT_QUEUE_ELEMENTS;
+	}
+
+	if (num_events) {
+		event_queue->oq_ci_copy = oq_ci;
+		writel(oq_ci, event_queue->oq_ci);
+		schedule_work(&ctrl_info->event_work);
+	}
+
+	return num_events;
+}
+
+#define PQI_LEGACY_INTX_MASK	0x1
+
+static inline void pqi_configure_legacy_intx(struct pqi_ctrl_info *ctrl_info, bool enable_intx)
+{
+	u32 intx_mask;
+	struct pqi_device_registers __iomem *pqi_registers;
+	volatile void __iomem *register_addr;
+
+	pqi_registers = ctrl_info->pqi_registers;
+
+	if (enable_intx)
+		register_addr = &pqi_registers->legacy_intx_mask_clear;
+	else
+		register_addr = &pqi_registers->legacy_intx_mask_set;
+
+	intx_mask = readl(register_addr);
+	intx_mask |= PQI_LEGACY_INTX_MASK;
+	writel(intx_mask, register_addr);
+}
+
+static void pqi_change_irq_mode(struct pqi_ctrl_info *ctrl_info,
+	enum pqi_irq_mode new_mode)
+{
+	switch (ctrl_info->irq_mode) {
+	case IRQ_MODE_MSIX:
+		switch (new_mode) {
+		case IRQ_MODE_MSIX:
+			break;
+		case IRQ_MODE_INTX:
+			pqi_configure_legacy_intx(ctrl_info, true);
+			sis_enable_intx(ctrl_info);
+			break;
+		case IRQ_MODE_NONE:
+			break;
+		}
+		break;
+	case IRQ_MODE_INTX:
+		switch (new_mode) {
+		case IRQ_MODE_MSIX:
+			pqi_configure_legacy_intx(ctrl_info, false);
+			sis_enable_msix(ctrl_info);
+			break;
+		case IRQ_MODE_INTX:
+			break;
+		case IRQ_MODE_NONE:
+			pqi_configure_legacy_intx(ctrl_info, false);
+			break;
+		}
+		break;
+	case IRQ_MODE_NONE:
+		switch (new_mode) {
+		case IRQ_MODE_MSIX:
+			sis_enable_msix(ctrl_info);
+			break;
+		case IRQ_MODE_INTX:
+			pqi_configure_legacy_intx(ctrl_info, true);
+			sis_enable_intx(ctrl_info);
+			break;
+		case IRQ_MODE_NONE:
+			break;
+		}
+		break;
+	}
+
+	ctrl_info->irq_mode = new_mode;
+}
+
+#define PQI_LEGACY_INTX_PENDING		0x1
+
+static inline bool pqi_is_valid_irq(struct pqi_ctrl_info *ctrl_info)
+{
+	bool valid_irq;
+	u32 intx_status;
+
+	switch (ctrl_info->irq_mode) {
+	case IRQ_MODE_MSIX:
+		valid_irq = true;
+		break;
+	case IRQ_MODE_INTX:
+		intx_status = readl(&ctrl_info->pqi_registers->legacy_intx_status);
+		if (intx_status & PQI_LEGACY_INTX_PENDING)
+			valid_irq = true;
+		else
+			valid_irq = false;
+		break;
+	case IRQ_MODE_NONE:
+	default:
+		valid_irq = false;
+		break;
+	}
+
+	return valid_irq;
+}
+
+static irqreturn_t pqi_irq_handler(int irq, void *data)
+{
+	struct pqi_ctrl_info *ctrl_info;
+	struct pqi_queue_group *queue_group;
+	int num_io_responses_handled;
+	int num_events_handled;
+
+	queue_group = data;
+	ctrl_info = queue_group->ctrl_info;
+
+	if (!pqi_is_valid_irq(ctrl_info))
+		return IRQ_NONE;
+
+	num_io_responses_handled = pqi_process_io_intr(ctrl_info, queue_group);
+	if (num_io_responses_handled < 0)
+		goto out;
+
+	if (irq == ctrl_info->event_irq) {
+		num_events_handled = pqi_process_event_intr(ctrl_info);
+		if (num_events_handled < 0)
+			goto out;
+	} else {
+		num_events_handled = 0;
+	}
+
+	if (num_io_responses_handled + num_events_handled > 0)
+		atomic_inc(&ctrl_info->num_interrupts);
+
+	pqi_start_io(ctrl_info, queue_group, RAID_PATH, NULL);
+	pqi_start_io(ctrl_info, queue_group, AIO_PATH, NULL);
+
+out:
+	return IRQ_HANDLED;
+}
+
+static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
+{
+	struct pci_dev *pci_dev = ctrl_info->pci_dev;
+	int i;
+	int rc;
+
+	ctrl_info->event_irq = pci_irq_vector(pci_dev, 0);
+
+	for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) {
+		rc = request_irq(pci_irq_vector(pci_dev, i), pqi_irq_handler, 0,
+			DRIVER_NAME_SHORT, &ctrl_info->queue_groups[i]);
+		if (rc) {
+			dev_err(&pci_dev->dev,
+				"irq %u init failed with error %d\n",
+				pci_irq_vector(pci_dev, i), rc);
+			return rc;
+		}
+		ctrl_info->num_msix_vectors_initialized++;
+	}
+
+	return 0;
+}
+
+static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info)
+{
+	int i;
+
+	for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
+		free_irq(pci_irq_vector(ctrl_info->pci_dev, i),
+			&ctrl_info->queue_groups[i]);
+
+	ctrl_info->num_msix_vectors_initialized = 0;
+}
+
+static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
+{
+	int num_vectors_enabled;
+	unsigned int flags = PCI_IRQ_MSIX;
+
+	if (!pqi_disable_managed_interrupts)
+		flags |= PCI_IRQ_AFFINITY;
+
+	num_vectors_enabled = pci_alloc_irq_vectors(ctrl_info->pci_dev,
+			PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups,
+			flags);
+	if (num_vectors_enabled < 0) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"MSI-X init failed with error %d\n",
+			num_vectors_enabled);
+		return num_vectors_enabled;
+	}
+
+	ctrl_info->num_msix_vectors_enabled = num_vectors_enabled;
+	ctrl_info->irq_mode = IRQ_MODE_MSIX;
+	return 0;
+}
+
+static void pqi_disable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
+{
+	if (ctrl_info->num_msix_vectors_enabled) {
+		pci_free_irq_vectors(ctrl_info->pci_dev);
+		ctrl_info->num_msix_vectors_enabled = 0;
+	}
+}
+
+static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info)
+{
+	unsigned int i;
+	size_t alloc_length;
+	size_t element_array_length_per_iq;
+	size_t element_array_length_per_oq;
+	void *element_array;
+	void __iomem *next_queue_index;
+	void *aligned_pointer;
+	unsigned int num_inbound_queues;
+	unsigned int num_outbound_queues;
+	unsigned int num_queue_indexes;
+	struct pqi_queue_group *queue_group;
+
+	element_array_length_per_iq =
+		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH *
+		ctrl_info->num_elements_per_iq;
+	element_array_length_per_oq =
+		PQI_OPERATIONAL_OQ_ELEMENT_LENGTH *
+		ctrl_info->num_elements_per_oq;
+	num_inbound_queues = ctrl_info->num_queue_groups * 2;
+	num_outbound_queues = ctrl_info->num_queue_groups;
+	num_queue_indexes = (ctrl_info->num_queue_groups * 3) + 1;
+
+	aligned_pointer = NULL;
+
+	for (i = 0; i < num_inbound_queues; i++) {
+		aligned_pointer = PTR_ALIGN(aligned_pointer,
+			PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
+		aligned_pointer += element_array_length_per_iq;
+	}
+
+	for (i = 0; i < num_outbound_queues; i++) {
+		aligned_pointer = PTR_ALIGN(aligned_pointer,
+			PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
+		aligned_pointer += element_array_length_per_oq;
+	}
+
+	aligned_pointer = PTR_ALIGN(aligned_pointer,
+		PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
+	aligned_pointer += PQI_NUM_EVENT_QUEUE_ELEMENTS *
+		PQI_EVENT_OQ_ELEMENT_LENGTH;
+
+	for (i = 0; i < num_queue_indexes; i++) {
+		aligned_pointer = PTR_ALIGN(aligned_pointer,
+			PQI_OPERATIONAL_INDEX_ALIGNMENT);
+		aligned_pointer += sizeof(pqi_index_t);
+	}
+
+	alloc_length = (size_t)aligned_pointer +
+		PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
+
+	alloc_length += PQI_EXTRA_SGL_MEMORY;
+
+	ctrl_info->queue_memory_base =
+		dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
+				   &ctrl_info->queue_memory_base_dma_handle,
+				   GFP_KERNEL);
+
+	if (!ctrl_info->queue_memory_base)
+		return -ENOMEM;
+
+	ctrl_info->queue_memory_length = alloc_length;
+
+	element_array = PTR_ALIGN(ctrl_info->queue_memory_base,
+		PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
+
+	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
+		queue_group = &ctrl_info->queue_groups[i];
+		queue_group->iq_element_array[RAID_PATH] = element_array;
+		queue_group->iq_element_array_bus_addr[RAID_PATH] =
+			ctrl_info->queue_memory_base_dma_handle +
+				(element_array - ctrl_info->queue_memory_base);
+		element_array += element_array_length_per_iq;
+		element_array = PTR_ALIGN(element_array,
+			PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
+		queue_group->iq_element_array[AIO_PATH] = element_array;
+		queue_group->iq_element_array_bus_addr[AIO_PATH] =
+			ctrl_info->queue_memory_base_dma_handle +
+			(element_array - ctrl_info->queue_memory_base);
+		element_array += element_array_length_per_iq;
+		element_array = PTR_ALIGN(element_array,
+			PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
+	}
+
+	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
+		queue_group = &ctrl_info->queue_groups[i];
+		queue_group->oq_element_array = element_array;
+		queue_group->oq_element_array_bus_addr =
+			ctrl_info->queue_memory_base_dma_handle +
+			(element_array - ctrl_info->queue_memory_base);
+		element_array += element_array_length_per_oq;
+		element_array = PTR_ALIGN(element_array,
+			PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
+	}
+
+	ctrl_info->event_queue.oq_element_array = element_array;
+	ctrl_info->event_queue.oq_element_array_bus_addr =
+		ctrl_info->queue_memory_base_dma_handle +
+		(element_array - ctrl_info->queue_memory_base);
+	element_array += PQI_NUM_EVENT_QUEUE_ELEMENTS *
+		PQI_EVENT_OQ_ELEMENT_LENGTH;
+
+	next_queue_index = (void __iomem *)PTR_ALIGN(element_array,
+		PQI_OPERATIONAL_INDEX_ALIGNMENT);
+
+	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
+		queue_group = &ctrl_info->queue_groups[i];
+		queue_group->iq_ci[RAID_PATH] = next_queue_index;
+		queue_group->iq_ci_bus_addr[RAID_PATH] =
+			ctrl_info->queue_memory_base_dma_handle +
+			(next_queue_index -
+			(void __iomem *)ctrl_info->queue_memory_base);
+		next_queue_index += sizeof(pqi_index_t);
+		next_queue_index = PTR_ALIGN(next_queue_index,
+			PQI_OPERATIONAL_INDEX_ALIGNMENT);
+		queue_group->iq_ci[AIO_PATH] = next_queue_index;
+		queue_group->iq_ci_bus_addr[AIO_PATH] =
+			ctrl_info->queue_memory_base_dma_handle +
+			(next_queue_index -
+			(void __iomem *)ctrl_info->queue_memory_base);
+		next_queue_index += sizeof(pqi_index_t);
+		next_queue_index = PTR_ALIGN(next_queue_index,
+			PQI_OPERATIONAL_INDEX_ALIGNMENT);
+		queue_group->oq_pi = next_queue_index;
+		queue_group->oq_pi_bus_addr =
+			ctrl_info->queue_memory_base_dma_handle +
+			(next_queue_index -
+			(void __iomem *)ctrl_info->queue_memory_base);
+		next_queue_index += sizeof(pqi_index_t);
+		next_queue_index = PTR_ALIGN(next_queue_index,
+			PQI_OPERATIONAL_INDEX_ALIGNMENT);
+	}
+
+	ctrl_info->event_queue.oq_pi = next_queue_index;
+	ctrl_info->event_queue.oq_pi_bus_addr =
+		ctrl_info->queue_memory_base_dma_handle +
+		(next_queue_index -
+		(void __iomem *)ctrl_info->queue_memory_base);
+
+	return 0;
+}
+
+static void pqi_init_operational_queues(struct pqi_ctrl_info *ctrl_info)
+{
+	unsigned int i;
+	u16 next_iq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
+	u16 next_oq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
+
+	/*
+	 * Initialize the backpointers to the controller structure in
+	 * each operational queue group structure.
+	 */
+	for (i = 0; i < ctrl_info->num_queue_groups; i++)
+		ctrl_info->queue_groups[i].ctrl_info = ctrl_info;
+
+	/*
+	 * Assign IDs to all operational queues.  Note that the IDs
+	 * assigned to operational IQs are independent of the IDs
+	 * assigned to operational OQs.
+	 */
+	ctrl_info->event_queue.oq_id = next_oq_id++;
+	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
+		ctrl_info->queue_groups[i].iq_id[RAID_PATH] = next_iq_id++;
+		ctrl_info->queue_groups[i].iq_id[AIO_PATH] = next_iq_id++;
+		ctrl_info->queue_groups[i].oq_id = next_oq_id++;
+	}
+
+	/*
+	 * Assign MSI-X table entry indexes to all queues.  Note that the
+	 * interrupt for the event queue is shared with the first queue group.
+	 */
+	ctrl_info->event_queue.int_msg_num = 0;
+	for (i = 0; i < ctrl_info->num_queue_groups; i++)
+		ctrl_info->queue_groups[i].int_msg_num = i;
+
+	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
+		spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[0]);
+		spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[1]);
+		INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[0]);
+		INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[1]);
+	}
+}
+
+static int pqi_alloc_admin_queues(struct pqi_ctrl_info *ctrl_info)
+{
+	size_t alloc_length;
+	struct pqi_admin_queues_aligned *admin_queues_aligned;
+	struct pqi_admin_queues *admin_queues;
+
+	alloc_length = sizeof(struct pqi_admin_queues_aligned) +
+		PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
+
+	ctrl_info->admin_queue_memory_base =
+		dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
+				   &ctrl_info->admin_queue_memory_base_dma_handle,
+				   GFP_KERNEL);
+
+	if (!ctrl_info->admin_queue_memory_base)
+		return -ENOMEM;
+
+	ctrl_info->admin_queue_memory_length = alloc_length;
+
+	admin_queues = &ctrl_info->admin_queues;
+	admin_queues_aligned = PTR_ALIGN(ctrl_info->admin_queue_memory_base,
+		PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
+	admin_queues->iq_element_array =
+		&admin_queues_aligned->iq_element_array;
+	admin_queues->oq_element_array =
+		&admin_queues_aligned->oq_element_array;
+	admin_queues->iq_ci =
+		(pqi_index_t __iomem *)&admin_queues_aligned->iq_ci;
+	admin_queues->oq_pi =
+		(pqi_index_t __iomem *)&admin_queues_aligned->oq_pi;
+
+	admin_queues->iq_element_array_bus_addr =
+		ctrl_info->admin_queue_memory_base_dma_handle +
+		(admin_queues->iq_element_array -
+		ctrl_info->admin_queue_memory_base);
+	admin_queues->oq_element_array_bus_addr =
+		ctrl_info->admin_queue_memory_base_dma_handle +
+		(admin_queues->oq_element_array -
+		ctrl_info->admin_queue_memory_base);
+	admin_queues->iq_ci_bus_addr =
+		ctrl_info->admin_queue_memory_base_dma_handle +
+		((void __iomem *)admin_queues->iq_ci -
+		(void __iomem *)ctrl_info->admin_queue_memory_base);
+	admin_queues->oq_pi_bus_addr =
+		ctrl_info->admin_queue_memory_base_dma_handle +
+		((void __iomem *)admin_queues->oq_pi -
+		(void __iomem *)ctrl_info->admin_queue_memory_base);
+
+	return 0;
+}
+
+#define PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES		HZ
+#define PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS	1
+
+static int pqi_create_admin_queues(struct pqi_ctrl_info *ctrl_info)
+{
+	struct pqi_device_registers __iomem *pqi_registers;
+	struct pqi_admin_queues *admin_queues;
+	unsigned long timeout;
+	u8 status;
+	u32 reg;
+
+	pqi_registers = ctrl_info->pqi_registers;
+	admin_queues = &ctrl_info->admin_queues;
+
+	writeq((u64)admin_queues->iq_element_array_bus_addr,
+		&pqi_registers->admin_iq_element_array_addr);
+	writeq((u64)admin_queues->oq_element_array_bus_addr,
+		&pqi_registers->admin_oq_element_array_addr);
+	writeq((u64)admin_queues->iq_ci_bus_addr,
+		&pqi_registers->admin_iq_ci_addr);
+	writeq((u64)admin_queues->oq_pi_bus_addr,
+		&pqi_registers->admin_oq_pi_addr);
+
+	reg = PQI_ADMIN_IQ_NUM_ELEMENTS |
+		(PQI_ADMIN_OQ_NUM_ELEMENTS << 8) |
+		(admin_queues->int_msg_num << 16);
+	writel(reg, &pqi_registers->admin_iq_num_elements);
+
+	writel(PQI_CREATE_ADMIN_QUEUE_PAIR,
+		&pqi_registers->function_and_status_code);
+
+	timeout = PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES + jiffies;
+	while (1) {
+		msleep(PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS);
+		status = readb(&pqi_registers->function_and_status_code);
+		if (status == PQI_STATUS_IDLE)
+			break;
+		if (time_after(jiffies, timeout))
+			return -ETIMEDOUT;
+	}
+
+	/*
+	 * The offset registers are not initialized to the correct
+	 * offsets until *after* the create admin queue pair command
+	 * completes successfully.
+	 */
+	admin_queues->iq_pi = ctrl_info->iomem_base +
+		PQI_DEVICE_REGISTERS_OFFSET +
+		readq(&pqi_registers->admin_iq_pi_offset);
+	admin_queues->oq_ci = ctrl_info->iomem_base +
+		PQI_DEVICE_REGISTERS_OFFSET +
+		readq(&pqi_registers->admin_oq_ci_offset);
+
+	return 0;
+}
+
+static void pqi_submit_admin_request(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_general_admin_request *request)
+{
+	struct pqi_admin_queues *admin_queues;
+	void *next_element;
+	pqi_index_t iq_pi;
+
+	admin_queues = &ctrl_info->admin_queues;
+	iq_pi = admin_queues->iq_pi_copy;
+
+	next_element = admin_queues->iq_element_array +
+		(iq_pi * PQI_ADMIN_IQ_ELEMENT_LENGTH);
+
+	memcpy(next_element, request, sizeof(*request));
+
+	iq_pi = (iq_pi + 1) % PQI_ADMIN_IQ_NUM_ELEMENTS;
+	admin_queues->iq_pi_copy = iq_pi;
+
+	/*
+	 * This write notifies the controller that an IU is available to be
+	 * processed.
+	 */
+	writel(iq_pi, admin_queues->iq_pi);
+}
+
+#define PQI_ADMIN_REQUEST_TIMEOUT_SECS	60
+
+static int pqi_poll_for_admin_response(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_general_admin_response *response)
+{
+	struct pqi_admin_queues *admin_queues;
+	pqi_index_t oq_pi;
+	pqi_index_t oq_ci;
+	unsigned long timeout;
+
+	admin_queues = &ctrl_info->admin_queues;
+	oq_ci = admin_queues->oq_ci_copy;
+
+	timeout = (PQI_ADMIN_REQUEST_TIMEOUT_SECS * HZ) + jiffies;
+
+	while (1) {
+		oq_pi = readl(admin_queues->oq_pi);
+		if (oq_pi != oq_ci)
+			break;
+		if (time_after(jiffies, timeout)) {
+			dev_err(&ctrl_info->pci_dev->dev,
+				"timed out waiting for admin response\n");
+			return -ETIMEDOUT;
+		}
+		if (!sis_is_firmware_running(ctrl_info))
+			return -ENXIO;
+		usleep_range(1000, 2000);
+	}
+
+	memcpy(response, admin_queues->oq_element_array +
+		(oq_ci * PQI_ADMIN_OQ_ELEMENT_LENGTH), sizeof(*response));
+
+	oq_ci = (oq_ci + 1) % PQI_ADMIN_OQ_NUM_ELEMENTS;
+	admin_queues->oq_ci_copy = oq_ci;
+	writel(oq_ci, admin_queues->oq_ci);
+
+	return 0;
+}
+
+static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_queue_group *queue_group, enum pqi_io_path path,
+	struct pqi_io_request *io_request)
+{
+	struct pqi_io_request *next;
+	void *next_element;
+	pqi_index_t iq_pi;
+	pqi_index_t iq_ci;
+	size_t iu_length;
+	unsigned long flags;
+	unsigned int num_elements_needed;
+	unsigned int num_elements_to_end_of_queue;
+	size_t copy_count;
+	struct pqi_iu_header *request;
+
+	spin_lock_irqsave(&queue_group->submit_lock[path], flags);
+
+	if (io_request) {
+		io_request->queue_group = queue_group;
+		list_add_tail(&io_request->request_list_entry,
+			&queue_group->request_list[path]);
+	}
+
+	iq_pi = queue_group->iq_pi_copy[path];
+
+	list_for_each_entry_safe(io_request, next,
+		&queue_group->request_list[path], request_list_entry) {
+
+		request = io_request->iu;
+
+		iu_length = get_unaligned_le16(&request->iu_length) +
+			PQI_REQUEST_HEADER_LENGTH;
+		num_elements_needed =
+			DIV_ROUND_UP(iu_length,
+				PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
+
+		iq_ci = readl(queue_group->iq_ci[path]);
+
+		if (num_elements_needed > pqi_num_elements_free(iq_pi, iq_ci,
+			ctrl_info->num_elements_per_iq))
+			break;
+
+		put_unaligned_le16(queue_group->oq_id,
+			&request->response_queue_id);
+
+		next_element = queue_group->iq_element_array[path] +
+			(iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
+
+		num_elements_to_end_of_queue =
+			ctrl_info->num_elements_per_iq - iq_pi;
+
+		if (num_elements_needed <= num_elements_to_end_of_queue) {
+			memcpy(next_element, request, iu_length);
+		} else {
+			copy_count = num_elements_to_end_of_queue *
+				PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
+			memcpy(next_element, request, copy_count);
+			memcpy(queue_group->iq_element_array[path],
+				(u8 *)request + copy_count,
+				iu_length - copy_count);
+		}
+
+		iq_pi = (iq_pi + num_elements_needed) %
+			ctrl_info->num_elements_per_iq;
+
+		list_del(&io_request->request_list_entry);
+	}
+
+	if (iq_pi != queue_group->iq_pi_copy[path]) {
+		queue_group->iq_pi_copy[path] = iq_pi;
+		/*
+		 * This write notifies the controller that one or more IUs are
+		 * available to be processed.
+		 */
+		writel(iq_pi, queue_group->iq_pi[path]);
+	}
+
+	spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
+}
+
+#define PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS		10
+
+static int pqi_wait_for_completion_io(struct pqi_ctrl_info *ctrl_info,
+	struct completion *wait)
+{
+	int rc;
+
+	while (1) {
+		if (wait_for_completion_io_timeout(wait,
+			PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS * HZ)) {
+			rc = 0;
+			break;
+		}
+
+		pqi_check_ctrl_health(ctrl_info);
+		if (pqi_ctrl_offline(ctrl_info)) {
+			rc = -ENXIO;
+			break;
+		}
+	}
+
+	return rc;
+}
+
+static void pqi_raid_synchronous_complete(struct pqi_io_request *io_request,
+	void *context)
+{
+	struct completion *waiting = context;
+
+	complete(waiting);
+}
+
+static int pqi_process_raid_io_error_synchronous(
+	struct pqi_raid_error_info *error_info)
+{
+	int rc = -EIO;
+
+	switch (error_info->data_out_result) {
+	case PQI_DATA_IN_OUT_GOOD:
+		if (error_info->status == SAM_STAT_GOOD)
+			rc = 0;
+		break;
+	case PQI_DATA_IN_OUT_UNDERFLOW:
+		if (error_info->status == SAM_STAT_GOOD ||
+			error_info->status == SAM_STAT_CHECK_CONDITION)
+			rc = 0;
+		break;
+	case PQI_DATA_IN_OUT_ABORTED:
+		rc = PQI_CMD_STATUS_ABORTED;
+		break;
+	}
+
+	return rc;
+}
+
+static inline bool pqi_is_blockable_request(struct pqi_iu_header *request)
+{
+	return (request->driver_flags & PQI_DRIVER_NONBLOCKABLE_REQUEST) == 0;
+}
+
+static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_iu_header *request, unsigned int flags,
+	struct pqi_raid_error_info *error_info)
+{
+	int rc = 0;
+	struct pqi_io_request *io_request;
+	size_t iu_length;
+	DECLARE_COMPLETION_ONSTACK(wait);
+
+	if (flags & PQI_SYNC_FLAGS_INTERRUPTABLE) {
+		if (down_interruptible(&ctrl_info->sync_request_sem))
+			return -ERESTARTSYS;
+	} else {
+		down(&ctrl_info->sync_request_sem);
+	}
+
+	pqi_ctrl_busy(ctrl_info);
+	/*
+	 * Wait for other admin queue updates such as;
+	 * config table changes, OFA memory updates, ...
+	 */
+	if (pqi_is_blockable_request(request))
+		pqi_wait_if_ctrl_blocked(ctrl_info);
+
+	if (pqi_ctrl_offline(ctrl_info)) {
+		rc = -ENXIO;
+		goto out;
+	}
+
+	io_request = pqi_alloc_io_request(ctrl_info);
+
+	put_unaligned_le16(io_request->index,
+		&(((struct pqi_raid_path_request *)request)->request_id));
+
+	if (request->iu_type == PQI_REQUEST_IU_RAID_PATH_IO)
+		((struct pqi_raid_path_request *)request)->error_index =
+			((struct pqi_raid_path_request *)request)->request_id;
+
+	iu_length = get_unaligned_le16(&request->iu_length) +
+		PQI_REQUEST_HEADER_LENGTH;
+	memcpy(io_request->iu, request, iu_length);
+
+	io_request->io_complete_callback = pqi_raid_synchronous_complete;
+	io_request->context = &wait;
+
+	pqi_start_io(ctrl_info, &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
+		io_request);
+
+	pqi_wait_for_completion_io(ctrl_info, &wait);
+
+	if (error_info) {
+		if (io_request->error_info)
+			memcpy(error_info, io_request->error_info, sizeof(*error_info));
+		else
+			memset(error_info, 0, sizeof(*error_info));
+	} else if (rc == 0 && io_request->error_info) {
+		rc = pqi_process_raid_io_error_synchronous(io_request->error_info);
+	}
+
+	pqi_free_io_request(io_request);
+
+out:
+	pqi_ctrl_unbusy(ctrl_info);
+	up(&ctrl_info->sync_request_sem);
+
+	return rc;
+}
+
+static int pqi_validate_admin_response(
+	struct pqi_general_admin_response *response, u8 expected_function_code)
+{
+	if (response->header.iu_type != PQI_RESPONSE_IU_GENERAL_ADMIN)
+		return -EINVAL;
+
+	if (get_unaligned_le16(&response->header.iu_length) !=
+		PQI_GENERAL_ADMIN_IU_LENGTH)
+		return -EINVAL;
+
+	if (response->function_code != expected_function_code)
+		return -EINVAL;
+
+	if (response->status != PQI_GENERAL_ADMIN_STATUS_SUCCESS)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int pqi_submit_admin_request_synchronous(
+	struct pqi_ctrl_info *ctrl_info,
+	struct pqi_general_admin_request *request,
+	struct pqi_general_admin_response *response)
+{
+	int rc;
+
+	pqi_submit_admin_request(ctrl_info, request);
+
+	rc = pqi_poll_for_admin_response(ctrl_info, response);
+
+	if (rc == 0)
+		rc = pqi_validate_admin_response(response, request->function_code);
+
+	return rc;
+}
+
+static int pqi_report_device_capability(struct pqi_ctrl_info *ctrl_info)
+{
+	int rc;
+	struct pqi_general_admin_request request;
+	struct pqi_general_admin_response response;
+	struct pqi_device_capability *capability;
+	struct pqi_iu_layer_descriptor *sop_iu_layer_descriptor;
+
+	capability = kmalloc(sizeof(*capability), GFP_KERNEL);
+	if (!capability)
+		return -ENOMEM;
+
+	memset(&request, 0, sizeof(request));
+
+	request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
+	put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
+		&request.header.iu_length);
+	request.function_code =
+		PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY;
+	put_unaligned_le32(sizeof(*capability),
+		&request.data.report_device_capability.buffer_length);
+
+	rc = pqi_map_single(ctrl_info->pci_dev,
+		&request.data.report_device_capability.sg_descriptor,
+		capability, sizeof(*capability),
+		DMA_FROM_DEVICE);
+	if (rc)
+		goto out;
+
+	rc = pqi_submit_admin_request_synchronous(ctrl_info, &request, &response);
+
+	pqi_pci_unmap(ctrl_info->pci_dev,
+		&request.data.report_device_capability.sg_descriptor, 1,
+		DMA_FROM_DEVICE);
+
+	if (rc)
+		goto out;
+
+	if (response.status != PQI_GENERAL_ADMIN_STATUS_SUCCESS) {
+		rc = -EIO;
+		goto out;
+	}
+
+	ctrl_info->max_inbound_queues =
+		get_unaligned_le16(&capability->max_inbound_queues);
+	ctrl_info->max_elements_per_iq =
+		get_unaligned_le16(&capability->max_elements_per_iq);
+	ctrl_info->max_iq_element_length =
+		get_unaligned_le16(&capability->max_iq_element_length)
+		* 16;
+	ctrl_info->max_outbound_queues =
+		get_unaligned_le16(&capability->max_outbound_queues);
+	ctrl_info->max_elements_per_oq =
+		get_unaligned_le16(&capability->max_elements_per_oq);
+	ctrl_info->max_oq_element_length =
+		get_unaligned_le16(&capability->max_oq_element_length)
+		* 16;
+
+	sop_iu_layer_descriptor =
+		&capability->iu_layer_descriptors[PQI_PROTOCOL_SOP];
+
+	ctrl_info->max_inbound_iu_length_per_firmware =
+		get_unaligned_le16(
+			&sop_iu_layer_descriptor->max_inbound_iu_length);
+	ctrl_info->inbound_spanning_supported =
+		sop_iu_layer_descriptor->inbound_spanning_supported;
+	ctrl_info->outbound_spanning_supported =
+		sop_iu_layer_descriptor->outbound_spanning_supported;
+
+out:
+	kfree(capability);
+
+	return rc;
+}
+
+static int pqi_validate_device_capability(struct pqi_ctrl_info *ctrl_info)
+{
+	if (ctrl_info->max_iq_element_length <
+		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"max. inbound queue element length of %d is less than the required length of %d\n",
+			ctrl_info->max_iq_element_length,
+			PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
+		return -EINVAL;
+	}
+
+	if (ctrl_info->max_oq_element_length <
+		PQI_OPERATIONAL_OQ_ELEMENT_LENGTH) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"max. outbound queue element length of %d is less than the required length of %d\n",
+			ctrl_info->max_oq_element_length,
+			PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
+		return -EINVAL;
+	}
+
+	if (ctrl_info->max_inbound_iu_length_per_firmware <
+		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"max. inbound IU length of %u is less than the min. required length of %d\n",
+			ctrl_info->max_inbound_iu_length_per_firmware,
+			PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
+		return -EINVAL;
+	}
+
+	if (!ctrl_info->inbound_spanning_supported) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"the controller does not support inbound spanning\n");
+		return -EINVAL;
+	}
+
+	if (ctrl_info->outbound_spanning_supported) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"the controller supports outbound spanning but this driver does not\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int pqi_create_event_queue(struct pqi_ctrl_info *ctrl_info)
+{
+	int rc;
+	struct pqi_event_queue *event_queue;
+	struct pqi_general_admin_request request;
+	struct pqi_general_admin_response response;
+
+	event_queue = &ctrl_info->event_queue;
+
+	/*
+	 * Create OQ (Outbound Queue - device to host queue) to dedicate
+	 * to events.
+	 */
+	memset(&request, 0, sizeof(request));
+	request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
+	put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
+		&request.header.iu_length);
+	request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
+	put_unaligned_le16(event_queue->oq_id,
+		&request.data.create_operational_oq.queue_id);
+	put_unaligned_le64((u64)event_queue->oq_element_array_bus_addr,
+		&request.data.create_operational_oq.element_array_addr);
+	put_unaligned_le64((u64)event_queue->oq_pi_bus_addr,
+		&request.data.create_operational_oq.pi_addr);
+	put_unaligned_le16(PQI_NUM_EVENT_QUEUE_ELEMENTS,
+		&request.data.create_operational_oq.num_elements);
+	put_unaligned_le16(PQI_EVENT_OQ_ELEMENT_LENGTH / 16,
+		&request.data.create_operational_oq.element_length);
+	request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
+	put_unaligned_le16(event_queue->int_msg_num,
+		&request.data.create_operational_oq.int_msg_num);
+
+	rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
+		&response);
+	if (rc)
+		return rc;
+
+	event_queue->oq_ci = ctrl_info->iomem_base +
+		PQI_DEVICE_REGISTERS_OFFSET +
+		get_unaligned_le64(
+			&response.data.create_operational_oq.oq_ci_offset);
+
+	return 0;
+}
+
+static int pqi_create_queue_group(struct pqi_ctrl_info *ctrl_info,
+	unsigned int group_number)
+{
+	int rc;
+	struct pqi_queue_group *queue_group;
+	struct pqi_general_admin_request request;
+	struct pqi_general_admin_response response;
+
+	queue_group = &ctrl_info->queue_groups[group_number];
+
+	/*
+	 * Create IQ (Inbound Queue - host to device queue) for
+	 * RAID path.
+	 */
+	memset(&request, 0, sizeof(request));
+	request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
+	put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
+		&request.header.iu_length);
+	request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
+	put_unaligned_le16(queue_group->iq_id[RAID_PATH],
+		&request.data.create_operational_iq.queue_id);
+	put_unaligned_le64(
+		(u64)queue_group->iq_element_array_bus_addr[RAID_PATH],
+		&request.data.create_operational_iq.element_array_addr);
+	put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[RAID_PATH],
+		&request.data.create_operational_iq.ci_addr);
+	put_unaligned_le16(ctrl_info->num_elements_per_iq,
+		&request.data.create_operational_iq.num_elements);
+	put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
+		&request.data.create_operational_iq.element_length);
+	request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
+
+	rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
+		&response);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error creating inbound RAID queue\n");
+		return rc;
+	}
+
+	queue_group->iq_pi[RAID_PATH] = ctrl_info->iomem_base +
+		PQI_DEVICE_REGISTERS_OFFSET +
+		get_unaligned_le64(
+			&response.data.create_operational_iq.iq_pi_offset);
+
+	/*
+	 * Create IQ (Inbound Queue - host to device queue) for
+	 * Advanced I/O (AIO) path.
+	 */
+	memset(&request, 0, sizeof(request));
+	request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
+	put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
+		&request.header.iu_length);
+	request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
+	put_unaligned_le16(queue_group->iq_id[AIO_PATH],
+		&request.data.create_operational_iq.queue_id);
+	put_unaligned_le64((u64)queue_group->
+		iq_element_array_bus_addr[AIO_PATH],
+		&request.data.create_operational_iq.element_array_addr);
+	put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[AIO_PATH],
+		&request.data.create_operational_iq.ci_addr);
+	put_unaligned_le16(ctrl_info->num_elements_per_iq,
+		&request.data.create_operational_iq.num_elements);
+	put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
+		&request.data.create_operational_iq.element_length);
+	request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
+
+	rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
+		&response);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error creating inbound AIO queue\n");
+		return rc;
+	}
+
+	queue_group->iq_pi[AIO_PATH] = ctrl_info->iomem_base +
+		PQI_DEVICE_REGISTERS_OFFSET +
+		get_unaligned_le64(
+			&response.data.create_operational_iq.iq_pi_offset);
+
+	/*
+	 * Designate the 2nd IQ as the AIO path.  By default, all IQs are
+	 * assumed to be for RAID path I/O unless we change the queue's
+	 * property.
+	 */
+	memset(&request, 0, sizeof(request));
+	request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
+	put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
+		&request.header.iu_length);
+	request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY;
+	put_unaligned_le16(queue_group->iq_id[AIO_PATH],
+		&request.data.change_operational_iq_properties.queue_id);
+	put_unaligned_le32(PQI_IQ_PROPERTY_IS_AIO_QUEUE,
+		&request.data.change_operational_iq_properties.vendor_specific);
+
+	rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
+		&response);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error changing queue property\n");
+		return rc;
+	}
+
+	/*
+	 * Create OQ (Outbound Queue - device to host queue).
+	 */
+	memset(&request, 0, sizeof(request));
+	request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
+	put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
+		&request.header.iu_length);
+	request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
+	put_unaligned_le16(queue_group->oq_id,
+		&request.data.create_operational_oq.queue_id);
+	put_unaligned_le64((u64)queue_group->oq_element_array_bus_addr,
+		&request.data.create_operational_oq.element_array_addr);
+	put_unaligned_le64((u64)queue_group->oq_pi_bus_addr,
+		&request.data.create_operational_oq.pi_addr);
+	put_unaligned_le16(ctrl_info->num_elements_per_oq,
+		&request.data.create_operational_oq.num_elements);
+	put_unaligned_le16(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH / 16,
+		&request.data.create_operational_oq.element_length);
+	request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
+	put_unaligned_le16(queue_group->int_msg_num,
+		&request.data.create_operational_oq.int_msg_num);
+
+	rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
+		&response);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error creating outbound queue\n");
+		return rc;
+	}
+
+	queue_group->oq_ci = ctrl_info->iomem_base +
+		PQI_DEVICE_REGISTERS_OFFSET +
+		get_unaligned_le64(
+			&response.data.create_operational_oq.oq_ci_offset);
+
+	return 0;
+}
+
+static int pqi_create_queues(struct pqi_ctrl_info *ctrl_info)
+{
+	int rc;
+	unsigned int i;
+
+	rc = pqi_create_event_queue(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error creating event queue\n");
+		return rc;
+	}
+
+	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
+		rc = pqi_create_queue_group(ctrl_info, i);
+		if (rc) {
+			dev_err(&ctrl_info->pci_dev->dev,
+				"error creating queue group number %u/%u\n",
+				i, ctrl_info->num_queue_groups);
+			return rc;
+		}
+	}
+
+	return 0;
+}
+
+#define PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH	\
+	struct_size((struct pqi_event_config *)0, descriptors, PQI_MAX_EVENT_DESCRIPTORS)
+
+static int pqi_configure_events(struct pqi_ctrl_info *ctrl_info,
+	bool enable_events)
+{
+	int rc;
+	unsigned int i;
+	struct pqi_event_config *event_config;
+	struct pqi_event_descriptor *event_descriptor;
+	struct pqi_general_management_request request;
+
+	event_config = kmalloc(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
+		GFP_KERNEL);
+	if (!event_config)
+		return -ENOMEM;
+
+	memset(&request, 0, sizeof(request));
+
+	request.header.iu_type = PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG;
+	put_unaligned_le16(offsetof(struct pqi_general_management_request,
+		data.report_event_configuration.sg_descriptors[1]) -
+		PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
+	put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
+		&request.data.report_event_configuration.buffer_length);
+
+	rc = pqi_map_single(ctrl_info->pci_dev,
+		request.data.report_event_configuration.sg_descriptors,
+		event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
+		DMA_FROM_DEVICE);
+	if (rc)
+		goto out;
+
+	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
+
+	pqi_pci_unmap(ctrl_info->pci_dev,
+		request.data.report_event_configuration.sg_descriptors, 1,
+		DMA_FROM_DEVICE);
+
+	if (rc)
+		goto out;
+
+	for (i = 0; i < event_config->num_event_descriptors; i++) {
+		event_descriptor = &event_config->descriptors[i];
+		if (enable_events &&
+			pqi_is_supported_event(event_descriptor->event_type))
+				put_unaligned_le16(ctrl_info->event_queue.oq_id,
+					&event_descriptor->oq_id);
+		else
+			put_unaligned_le16(0, &event_descriptor->oq_id);
+	}
+
+	memset(&request, 0, sizeof(request));
+
+	request.header.iu_type = PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG;
+	put_unaligned_le16(offsetof(struct pqi_general_management_request,
+		data.report_event_configuration.sg_descriptors[1]) -
+		PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
+	put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
+		&request.data.report_event_configuration.buffer_length);
+
+	rc = pqi_map_single(ctrl_info->pci_dev,
+		request.data.report_event_configuration.sg_descriptors,
+		event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
+		DMA_TO_DEVICE);
+	if (rc)
+		goto out;
+
+	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
+
+	pqi_pci_unmap(ctrl_info->pci_dev,
+		request.data.report_event_configuration.sg_descriptors, 1,
+		DMA_TO_DEVICE);
+
+out:
+	kfree(event_config);
+
+	return rc;
+}
+
+static inline int pqi_enable_events(struct pqi_ctrl_info *ctrl_info)
+{
+	return pqi_configure_events(ctrl_info, true);
+}
+
+static void pqi_free_all_io_requests(struct pqi_ctrl_info *ctrl_info)
+{
+	unsigned int i;
+	struct device *dev;
+	size_t sg_chain_buffer_length;
+	struct pqi_io_request *io_request;
+
+	if (!ctrl_info->io_request_pool)
+		return;
+
+	dev = &ctrl_info->pci_dev->dev;
+	sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
+	io_request = ctrl_info->io_request_pool;
+
+	for (i = 0; i < ctrl_info->max_io_slots; i++) {
+		kfree(io_request->iu);
+		if (!io_request->sg_chain_buffer)
+			break;
+		dma_free_coherent(dev, sg_chain_buffer_length,
+			io_request->sg_chain_buffer,
+			io_request->sg_chain_buffer_dma_handle);
+		io_request++;
+	}
+
+	kfree(ctrl_info->io_request_pool);
+	ctrl_info->io_request_pool = NULL;
+}
+
+static inline int pqi_alloc_error_buffer(struct pqi_ctrl_info *ctrl_info)
+{
+	ctrl_info->error_buffer = dma_alloc_coherent(&ctrl_info->pci_dev->dev,
+				     ctrl_info->error_buffer_length,
+				     &ctrl_info->error_buffer_dma_handle,
+				     GFP_KERNEL);
+	if (!ctrl_info->error_buffer)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static int pqi_alloc_io_resources(struct pqi_ctrl_info *ctrl_info)
+{
+	unsigned int i;
+	void *sg_chain_buffer;
+	size_t sg_chain_buffer_length;
+	dma_addr_t sg_chain_buffer_dma_handle;
+	struct device *dev;
+	struct pqi_io_request *io_request;
+
+	ctrl_info->io_request_pool = kcalloc(ctrl_info->max_io_slots,
+		sizeof(ctrl_info->io_request_pool[0]), GFP_KERNEL);
+
+	if (!ctrl_info->io_request_pool) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"failed to allocate I/O request pool\n");
+		goto error;
+	}
+
+	dev = &ctrl_info->pci_dev->dev;
+	sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
+	io_request = ctrl_info->io_request_pool;
+
+	for (i = 0; i < ctrl_info->max_io_slots; i++) {
+		io_request->iu = kmalloc(ctrl_info->max_inbound_iu_length, GFP_KERNEL);
+
+		if (!io_request->iu) {
+			dev_err(&ctrl_info->pci_dev->dev,
+				"failed to allocate IU buffers\n");
+			goto error;
+		}
+
+		sg_chain_buffer = dma_alloc_coherent(dev,
+			sg_chain_buffer_length, &sg_chain_buffer_dma_handle,
+			GFP_KERNEL);
+
+		if (!sg_chain_buffer) {
+			dev_err(&ctrl_info->pci_dev->dev,
+				"failed to allocate PQI scatter-gather chain buffers\n");
+			goto error;
+		}
+
+		io_request->index = i;
+		io_request->sg_chain_buffer = sg_chain_buffer;
+		io_request->sg_chain_buffer_dma_handle = sg_chain_buffer_dma_handle;
+		io_request++;
+	}
+
+	return 0;
+
+error:
+	pqi_free_all_io_requests(ctrl_info);
+
+	return -ENOMEM;
+}
+
+/*
+ * Calculate required resources that are sized based on max. outstanding
+ * requests and max. transfer size.
+ */
+
+static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
+{
+	u32 max_transfer_size;
+	u32 max_sg_entries;
+
+	ctrl_info->scsi_ml_can_queue =
+		ctrl_info->max_outstanding_requests - PQI_RESERVED_IO_SLOTS;
+	ctrl_info->max_io_slots = ctrl_info->max_outstanding_requests;
+
+	ctrl_info->error_buffer_length =
+		ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH;
+
+	if (reset_devices)
+		max_transfer_size = min(ctrl_info->max_transfer_size,
+			PQI_MAX_TRANSFER_SIZE_KDUMP);
+	else
+		max_transfer_size = min(ctrl_info->max_transfer_size,
+			PQI_MAX_TRANSFER_SIZE);
+
+	max_sg_entries = max_transfer_size / PAGE_SIZE;
+
+	/* +1 to cover when the buffer is not page-aligned. */
+	max_sg_entries++;
+
+	max_sg_entries = min(ctrl_info->max_sg_entries, max_sg_entries);
+
+	max_transfer_size = (max_sg_entries - 1) * PAGE_SIZE;
+
+	ctrl_info->sg_chain_buffer_length =
+		(max_sg_entries * sizeof(struct pqi_sg_descriptor)) +
+		PQI_EXTRA_SGL_MEMORY;
+	ctrl_info->sg_tablesize = max_sg_entries;
+	ctrl_info->max_sectors = max_transfer_size / 512;
+}
+
+static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info)
+{
+	int num_queue_groups;
+	u16 num_elements_per_iq;
+	u16 num_elements_per_oq;
+
+	if (reset_devices) {
+		num_queue_groups = 1;
+	} else {
+		int num_cpus;
+		int max_queue_groups;
+
+		max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
+			ctrl_info->max_outbound_queues - 1);
+		max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
+
+		num_cpus = num_online_cpus();
+		num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
+		num_queue_groups = min(num_queue_groups, max_queue_groups);
+	}
+
+	ctrl_info->num_queue_groups = num_queue_groups;
+	ctrl_info->max_hw_queue_index = num_queue_groups - 1;
+
+	/*
+	 * Make sure that the max. inbound IU length is an even multiple
+	 * of our inbound element length.
+	 */
+	ctrl_info->max_inbound_iu_length =
+		(ctrl_info->max_inbound_iu_length_per_firmware /
+		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) *
+		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
+
+	num_elements_per_iq =
+		(ctrl_info->max_inbound_iu_length /
+		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
+
+	/* Add one because one element in each queue is unusable. */
+	num_elements_per_iq++;
+
+	num_elements_per_iq = min(num_elements_per_iq,
+		ctrl_info->max_elements_per_iq);
+
+	num_elements_per_oq = ((num_elements_per_iq - 1) * 2) + 1;
+	num_elements_per_oq = min(num_elements_per_oq,
+		ctrl_info->max_elements_per_oq);
+
+	ctrl_info->num_elements_per_iq = num_elements_per_iq;
+	ctrl_info->num_elements_per_oq = num_elements_per_oq;
+
+	ctrl_info->max_sg_per_iu =
+		((ctrl_info->max_inbound_iu_length -
+		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
+		sizeof(struct pqi_sg_descriptor)) +
+		PQI_MAX_EMBEDDED_SG_DESCRIPTORS;
+
+	ctrl_info->max_sg_per_r56_iu =
+		((ctrl_info->max_inbound_iu_length -
+		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
+		sizeof(struct pqi_sg_descriptor)) +
+		PQI_MAX_EMBEDDED_R56_SG_DESCRIPTORS;
+}
+
+static inline void pqi_set_sg_descriptor(struct pqi_sg_descriptor *sg_descriptor,
+	struct scatterlist *sg)
+{
+	u64 address = (u64)sg_dma_address(sg);
+	unsigned int length = sg_dma_len(sg);
+
+	put_unaligned_le64(address, &sg_descriptor->address);
+	put_unaligned_le32(length, &sg_descriptor->length);
+	put_unaligned_le32(0, &sg_descriptor->flags);
+}
+
+static unsigned int pqi_build_sg_list(struct pqi_sg_descriptor *sg_descriptor,
+	struct scatterlist *sg, int sg_count, struct pqi_io_request *io_request,
+	int max_sg_per_iu, bool *chained)
+{
+	int i;
+	unsigned int num_sg_in_iu;
+
+	*chained = false;
+	i = 0;
+	num_sg_in_iu = 0;
+	max_sg_per_iu--;	/* Subtract 1 to leave room for chain marker. */
+
+	while (1) {
+		pqi_set_sg_descriptor(sg_descriptor, sg);
+		if (!*chained)
+			num_sg_in_iu++;
+		i++;
+		if (i == sg_count)
+			break;
+		sg_descriptor++;
+		if (i == max_sg_per_iu) {
+			put_unaligned_le64((u64)io_request->sg_chain_buffer_dma_handle,
+				&sg_descriptor->address);
+			put_unaligned_le32((sg_count - num_sg_in_iu) * sizeof(*sg_descriptor),
+				&sg_descriptor->length);
+			put_unaligned_le32(CISS_SG_CHAIN, &sg_descriptor->flags);
+			*chained = true;
+			num_sg_in_iu++;
+			sg_descriptor = io_request->sg_chain_buffer;
+		}
+		sg = sg_next(sg);
+	}
+
+	put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
+
+	return num_sg_in_iu;
+}
+
+static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_raid_path_request *request, struct scsi_cmnd *scmd,
+	struct pqi_io_request *io_request)
+{
+	u16 iu_length;
+	int sg_count;
+	bool chained;
+	unsigned int num_sg_in_iu;
+	struct scatterlist *sg;
+	struct pqi_sg_descriptor *sg_descriptor;
+
+	sg_count = scsi_dma_map(scmd);
+	if (sg_count < 0)
+		return sg_count;
+
+	iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
+		PQI_REQUEST_HEADER_LENGTH;
+
+	if (sg_count == 0)
+		goto out;
+
+	sg = scsi_sglist(scmd);
+	sg_descriptor = request->sg_descriptors;
+
+	num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
+		ctrl_info->max_sg_per_iu, &chained);
+
+	request->partial = chained;
+	iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
+
+out:
+	put_unaligned_le16(iu_length, &request->header.iu_length);
+
+	return 0;
+}
+
+static int pqi_build_aio_r1_sg_list(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_aio_r1_path_request *request, struct scsi_cmnd *scmd,
+	struct pqi_io_request *io_request)
+{
+	u16 iu_length;
+	int sg_count;
+	bool chained;
+	unsigned int num_sg_in_iu;
+	struct scatterlist *sg;
+	struct pqi_sg_descriptor *sg_descriptor;
+
+	sg_count = scsi_dma_map(scmd);
+	if (sg_count < 0)
+		return sg_count;
+
+	iu_length = offsetof(struct pqi_aio_r1_path_request, sg_descriptors) -
+		PQI_REQUEST_HEADER_LENGTH;
+	num_sg_in_iu = 0;
+
+	if (sg_count == 0)
+		goto out;
+
+	sg = scsi_sglist(scmd);
+	sg_descriptor = request->sg_descriptors;
+
+	num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
+		ctrl_info->max_sg_per_iu, &chained);
+
+	request->partial = chained;
+	iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
+
+out:
+	put_unaligned_le16(iu_length, &request->header.iu_length);
+	request->num_sg_descriptors = num_sg_in_iu;
+
+	return 0;
+}
+
+static int pqi_build_aio_r56_sg_list(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_aio_r56_path_request *request, struct scsi_cmnd *scmd,
+	struct pqi_io_request *io_request)
+{
+	u16 iu_length;
+	int sg_count;
+	bool chained;
+	unsigned int num_sg_in_iu;
+	struct scatterlist *sg;
+	struct pqi_sg_descriptor *sg_descriptor;
+
+	sg_count = scsi_dma_map(scmd);
+	if (sg_count < 0)
+		return sg_count;
+
+	iu_length = offsetof(struct pqi_aio_r56_path_request, sg_descriptors) -
+		PQI_REQUEST_HEADER_LENGTH;
+	num_sg_in_iu = 0;
+
+	if (sg_count != 0) {
+		sg = scsi_sglist(scmd);
+		sg_descriptor = request->sg_descriptors;
+
+		num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
+			ctrl_info->max_sg_per_r56_iu, &chained);
+
+		request->partial = chained;
+		iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
+	}
+
+	put_unaligned_le16(iu_length, &request->header.iu_length);
+	request->num_sg_descriptors = num_sg_in_iu;
+
+	return 0;
+}
+
+static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_aio_path_request *request, struct scsi_cmnd *scmd,
+	struct pqi_io_request *io_request)
+{
+	u16 iu_length;
+	int sg_count;
+	bool chained;
+	unsigned int num_sg_in_iu;
+	struct scatterlist *sg;
+	struct pqi_sg_descriptor *sg_descriptor;
+
+	sg_count = scsi_dma_map(scmd);
+	if (sg_count < 0)
+		return sg_count;
+
+	iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) -
+		PQI_REQUEST_HEADER_LENGTH;
+	num_sg_in_iu = 0;
+
+	if (sg_count == 0)
+		goto out;
+
+	sg = scsi_sglist(scmd);
+	sg_descriptor = request->sg_descriptors;
+
+	num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
+		ctrl_info->max_sg_per_iu, &chained);
+
+	request->partial = chained;
+	iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
+
+out:
+	put_unaligned_le16(iu_length, &request->header.iu_length);
+	request->num_sg_descriptors = num_sg_in_iu;
+
+	return 0;
+}
+
+static void pqi_raid_io_complete(struct pqi_io_request *io_request,
+	void *context)
+{
+	struct scsi_cmnd *scmd;
+
+	scmd = io_request->scmd;
+	pqi_free_io_request(io_request);
+	scsi_dma_unmap(scmd);
+	pqi_scsi_done(scmd);
+}
+
+static int pqi_raid_submit_scsi_cmd_with_io_request(
+	struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
+	struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
+	struct pqi_queue_group *queue_group)
+{
+	int rc;
+	size_t cdb_length;
+	struct pqi_raid_path_request *request;
+
+	io_request->io_complete_callback = pqi_raid_io_complete;
+	io_request->scmd = scmd;
+
+	request = io_request->iu;
+	memset(request, 0, offsetof(struct pqi_raid_path_request, sg_descriptors));
+
+	request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
+	put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
+	request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
+	put_unaligned_le16(io_request->index, &request->request_id);
+	request->error_index = request->request_id;
+	memcpy(request->lun_number, device->scsi3addr, sizeof(request->lun_number));
+	request->ml_device_lun_number = (u8)scmd->device->lun;
+
+	cdb_length = min_t(size_t, scmd->cmd_len, sizeof(request->cdb));
+	memcpy(request->cdb, scmd->cmnd, cdb_length);
+
+	switch (cdb_length) {
+	case 6:
+	case 10:
+	case 12:
+	case 16:
+		request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
+		break;
+	case 20:
+		request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_4;
+		break;
+	case 24:
+		request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_8;
+		break;
+	case 28:
+		request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_12;
+		break;
+	case 32:
+	default:
+		request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_16;
+		break;
+	}
+
+	switch (scmd->sc_data_direction) {
+	case DMA_FROM_DEVICE:
+		request->data_direction = SOP_READ_FLAG;
+		break;
+	case DMA_TO_DEVICE:
+		request->data_direction = SOP_WRITE_FLAG;
+		break;
+	case DMA_NONE:
+		request->data_direction = SOP_NO_DIRECTION_FLAG;
+		break;
+	case DMA_BIDIRECTIONAL:
+		request->data_direction = SOP_BIDIRECTIONAL;
+		break;
+	default:
+		dev_err(&ctrl_info->pci_dev->dev,
+			"unknown data direction: %d\n",
+			scmd->sc_data_direction);
+		break;
+	}
+
+	rc = pqi_build_raid_sg_list(ctrl_info, request, scmd, io_request);
+	if (rc) {
+		pqi_free_io_request(io_request);
+		return SCSI_MLQUEUE_HOST_BUSY;
+	}
+
+	pqi_start_io(ctrl_info, queue_group, RAID_PATH, io_request);
+
+	return 0;
+}
+
+static inline int pqi_raid_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
+	struct pqi_queue_group *queue_group)
+{
+	struct pqi_io_request *io_request;
+
+	io_request = pqi_alloc_io_request(ctrl_info);
+
+	return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
+		device, scmd, queue_group);
+}
+
+static bool pqi_raid_bypass_retry_needed(struct pqi_io_request *io_request)
+{
+	struct scsi_cmnd *scmd;
+	struct pqi_scsi_dev *device;
+	struct pqi_ctrl_info *ctrl_info;
+
+	if (!io_request->raid_bypass)
+		return false;
+
+	scmd = io_request->scmd;
+	if ((scmd->result & 0xff) == SAM_STAT_GOOD)
+		return false;
+	if (host_byte(scmd->result) == DID_NO_CONNECT)
+		return false;
+
+	device = scmd->device->hostdata;
+	if (pqi_device_offline(device) || pqi_device_in_remove(device))
+		return false;
+
+	ctrl_info = shost_to_hba(scmd->device->host);
+	if (pqi_ctrl_offline(ctrl_info))
+		return false;
+
+	return true;
+}
+
+static void pqi_aio_io_complete(struct pqi_io_request *io_request,
+	void *context)
+{
+	struct scsi_cmnd *scmd;
+
+	scmd = io_request->scmd;
+	scsi_dma_unmap(scmd);
+	if (io_request->status == -EAGAIN || pqi_raid_bypass_retry_needed(io_request)) {
+		set_host_byte(scmd, DID_IMM_RETRY);
+		pqi_cmd_priv(scmd)->this_residual++;
+	}
+
+	pqi_free_io_request(io_request);
+	pqi_scsi_done(scmd);
+}
+
+static inline bool pqi_is_io_high_priority(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device, struct scsi_cmnd *scmd)
+{
+	bool io_high_prio;
+	int priority_class;
+
+	io_high_prio = false;
+
+	if (device->ncq_prio_enable) {
+		priority_class =
+			IOPRIO_PRIO_CLASS(req_get_ioprio(scsi_cmd_to_rq(scmd)));
+		if (priority_class == IOPRIO_CLASS_RT) {
+			/* Set NCQ priority for read/write commands. */
+			switch (scmd->cmnd[0]) {
+			case WRITE_16:
+			case READ_16:
+			case WRITE_12:
+			case READ_12:
+			case WRITE_10:
+			case READ_10:
+			case WRITE_6:
+			case READ_6:
+				io_high_prio = true;
+				break;
+			}
+		}
+	}
+
+	return io_high_prio;
+}
+
+static inline int pqi_aio_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
+	struct pqi_queue_group *queue_group)
+{
+	bool io_high_prio;
+
+	io_high_prio = pqi_is_io_high_priority(ctrl_info, device, scmd);
+
+	return pqi_aio_submit_io(ctrl_info, scmd, device->aio_handle,
+		scmd->cmnd, scmd->cmd_len, queue_group, NULL,
+		false, io_high_prio);
+}
+
+static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
+	struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
+	unsigned int cdb_length, struct pqi_queue_group *queue_group,
+	struct pqi_encryption_info *encryption_info, bool raid_bypass,
+	bool io_high_prio)
+{
+	int rc;
+	struct pqi_io_request *io_request;
+	struct pqi_aio_path_request *request;
+	struct pqi_scsi_dev *device;
+
+	device = scmd->device->hostdata;
+	io_request = pqi_alloc_io_request(ctrl_info);
+	io_request->io_complete_callback = pqi_aio_io_complete;
+	io_request->scmd = scmd;
+	io_request->raid_bypass = raid_bypass;
+
+	request = io_request->iu;
+	memset(request, 0, offsetof(struct pqi_aio_path_request, sg_descriptors));
+
+	request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_IO;
+	put_unaligned_le32(aio_handle, &request->nexus_id);
+	put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
+	request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
+	request->command_priority = io_high_prio;
+	put_unaligned_le16(io_request->index, &request->request_id);
+	request->error_index = request->request_id;
+	if (!pqi_is_logical_device(device) && ctrl_info->multi_lun_device_supported)
+		put_unaligned_le64(((scmd->device->lun) << 8), &request->lun_number);
+	if (cdb_length > sizeof(request->cdb))
+		cdb_length = sizeof(request->cdb);
+	request->cdb_length = cdb_length;
+	memcpy(request->cdb, cdb, cdb_length);
+
+	switch (scmd->sc_data_direction) {
+	case DMA_TO_DEVICE:
+		request->data_direction = SOP_READ_FLAG;
+		break;
+	case DMA_FROM_DEVICE:
+		request->data_direction = SOP_WRITE_FLAG;
+		break;
+	case DMA_NONE:
+		request->data_direction = SOP_NO_DIRECTION_FLAG;
+		break;
+	case DMA_BIDIRECTIONAL:
+		request->data_direction = SOP_BIDIRECTIONAL;
+		break;
+	default:
+		dev_err(&ctrl_info->pci_dev->dev,
+			"unknown data direction: %d\n",
+			scmd->sc_data_direction);
+		break;
+	}
+
+	if (encryption_info) {
+		request->encryption_enable = true;
+		put_unaligned_le16(encryption_info->data_encryption_key_index,
+			&request->data_encryption_key_index);
+		put_unaligned_le32(encryption_info->encrypt_tweak_lower,
+			&request->encrypt_tweak_lower);
+		put_unaligned_le32(encryption_info->encrypt_tweak_upper,
+			&request->encrypt_tweak_upper);
+	}
+
+	rc = pqi_build_aio_sg_list(ctrl_info, request, scmd, io_request);
+	if (rc) {
+		pqi_free_io_request(io_request);
+		return SCSI_MLQUEUE_HOST_BUSY;
+	}
+
+	pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
+
+	return 0;
+}
+
+static  int pqi_aio_submit_r1_write_io(struct pqi_ctrl_info *ctrl_info,
+	struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
+	struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
+	struct pqi_scsi_dev_raid_map_data *rmd)
+{
+	int rc;
+	struct pqi_io_request *io_request;
+	struct pqi_aio_r1_path_request *r1_request;
+
+	io_request = pqi_alloc_io_request(ctrl_info);
+	io_request->io_complete_callback = pqi_aio_io_complete;
+	io_request->scmd = scmd;
+	io_request->raid_bypass = true;
+
+	r1_request = io_request->iu;
+	memset(r1_request, 0, offsetof(struct pqi_aio_r1_path_request, sg_descriptors));
+
+	r1_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID1_IO;
+	put_unaligned_le16(*(u16 *)device->scsi3addr & 0x3fff, &r1_request->volume_id);
+	r1_request->num_drives = rmd->num_it_nexus_entries;
+	put_unaligned_le32(rmd->it_nexus[0], &r1_request->it_nexus_1);
+	put_unaligned_le32(rmd->it_nexus[1], &r1_request->it_nexus_2);
+	if (rmd->num_it_nexus_entries == 3)
+		put_unaligned_le32(rmd->it_nexus[2], &r1_request->it_nexus_3);
+
+	put_unaligned_le32(scsi_bufflen(scmd), &r1_request->data_length);
+	r1_request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
+	put_unaligned_le16(io_request->index, &r1_request->request_id);
+	r1_request->error_index = r1_request->request_id;
+	if (rmd->cdb_length > sizeof(r1_request->cdb))
+		rmd->cdb_length = sizeof(r1_request->cdb);
+	r1_request->cdb_length = rmd->cdb_length;
+	memcpy(r1_request->cdb, rmd->cdb, rmd->cdb_length);
+
+	/* The direction is always write. */
+	r1_request->data_direction = SOP_READ_FLAG;
+
+	if (encryption_info) {
+		r1_request->encryption_enable = true;
+		put_unaligned_le16(encryption_info->data_encryption_key_index,
+				&r1_request->data_encryption_key_index);
+		put_unaligned_le32(encryption_info->encrypt_tweak_lower,
+				&r1_request->encrypt_tweak_lower);
+		put_unaligned_le32(encryption_info->encrypt_tweak_upper,
+				&r1_request->encrypt_tweak_upper);
+	}
+
+	rc = pqi_build_aio_r1_sg_list(ctrl_info, r1_request, scmd, io_request);
+	if (rc) {
+		pqi_free_io_request(io_request);
+		return SCSI_MLQUEUE_HOST_BUSY;
+	}
+
+	pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
+
+	return 0;
+}
+
+static int pqi_aio_submit_r56_write_io(struct pqi_ctrl_info *ctrl_info,
+	struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
+	struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
+	struct pqi_scsi_dev_raid_map_data *rmd)
+{
+	int rc;
+	struct pqi_io_request *io_request;
+	struct pqi_aio_r56_path_request *r56_request;
+
+	io_request = pqi_alloc_io_request(ctrl_info);
+	io_request->io_complete_callback = pqi_aio_io_complete;
+	io_request->scmd = scmd;
+	io_request->raid_bypass = true;
+
+	r56_request = io_request->iu;
+	memset(r56_request, 0, offsetof(struct pqi_aio_r56_path_request, sg_descriptors));
+
+	if (device->raid_level == SA_RAID_5 || device->raid_level == SA_RAID_51)
+		r56_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID5_IO;
+	else
+		r56_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID6_IO;
+
+	put_unaligned_le16(*(u16 *)device->scsi3addr & 0x3fff, &r56_request->volume_id);
+	put_unaligned_le32(rmd->aio_handle, &r56_request->data_it_nexus);
+	put_unaligned_le32(rmd->p_parity_it_nexus, &r56_request->p_parity_it_nexus);
+	if (rmd->raid_level == SA_RAID_6) {
+		put_unaligned_le32(rmd->q_parity_it_nexus, &r56_request->q_parity_it_nexus);
+		r56_request->xor_multiplier = rmd->xor_mult;
+	}
+	put_unaligned_le32(scsi_bufflen(scmd), &r56_request->data_length);
+	r56_request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
+	put_unaligned_le64(rmd->row, &r56_request->row);
+
+	put_unaligned_le16(io_request->index, &r56_request->request_id);
+	r56_request->error_index = r56_request->request_id;
+
+	if (rmd->cdb_length > sizeof(r56_request->cdb))
+		rmd->cdb_length = sizeof(r56_request->cdb);
+	r56_request->cdb_length = rmd->cdb_length;
+	memcpy(r56_request->cdb, rmd->cdb, rmd->cdb_length);
+
+	/* The direction is always write. */
+	r56_request->data_direction = SOP_READ_FLAG;
+
+	if (encryption_info) {
+		r56_request->encryption_enable = true;
+		put_unaligned_le16(encryption_info->data_encryption_key_index,
+				&r56_request->data_encryption_key_index);
+		put_unaligned_le32(encryption_info->encrypt_tweak_lower,
+				&r56_request->encrypt_tweak_lower);
+		put_unaligned_le32(encryption_info->encrypt_tweak_upper,
+				&r56_request->encrypt_tweak_upper);
+	}
+
+	rc = pqi_build_aio_r56_sg_list(ctrl_info, r56_request, scmd, io_request);
+	if (rc) {
+		pqi_free_io_request(io_request);
+		return SCSI_MLQUEUE_HOST_BUSY;
+	}
+
+	pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
+
+	return 0;
+}
+
+static inline u16 pqi_get_hw_queue(struct pqi_ctrl_info *ctrl_info,
+	struct scsi_cmnd *scmd)
+{
+	u16 hw_queue;
+
+	hw_queue = blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scsi_cmd_to_rq(scmd)));
+	if (hw_queue > ctrl_info->max_hw_queue_index)
+		hw_queue = 0;
+
+	return hw_queue;
+}
+
+static inline bool pqi_is_bypass_eligible_request(struct scsi_cmnd *scmd)
+{
+	if (blk_rq_is_passthrough(scsi_cmd_to_rq(scmd)))
+		return false;
+
+	return pqi_cmd_priv(scmd)->this_residual == 0;
+}
+
+/*
+ * This function gets called just before we hand the completed SCSI request
+ * back to the SML.
+ */
+
+void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd)
+{
+	struct pqi_scsi_dev *device;
+
+	if (!scmd->device) {
+		set_host_byte(scmd, DID_NO_CONNECT);
+		return;
+	}
+
+	device = scmd->device->hostdata;
+	if (!device) {
+		set_host_byte(scmd, DID_NO_CONNECT);
+		return;
+	}
+
+	atomic_dec(&device->scsi_cmds_outstanding[scmd->device->lun]);
+}
+
+static bool pqi_is_parity_write_stream(struct pqi_ctrl_info *ctrl_info,
+	struct scsi_cmnd *scmd)
+{
+	u32 oldest_jiffies;
+	u8 lru_index;
+	int i;
+	int rc;
+	struct pqi_scsi_dev *device;
+	struct pqi_stream_data *pqi_stream_data;
+	struct pqi_scsi_dev_raid_map_data rmd;
+
+	if (!ctrl_info->enable_stream_detection)
+		return false;
+
+	rc = pqi_get_aio_lba_and_block_count(scmd, &rmd);
+	if (rc)
+		return false;
+
+	/* Check writes only. */
+	if (!rmd.is_write)
+		return false;
+
+	device = scmd->device->hostdata;
+
+	/* Check for RAID 5/6 streams. */
+	if (device->raid_level != SA_RAID_5 && device->raid_level != SA_RAID_6)
+		return false;
+
+	/*
+	 * If controller does not support AIO RAID{5,6} writes, need to send
+	 * requests down non-AIO path.
+	 */
+	if ((device->raid_level == SA_RAID_5 && !ctrl_info->enable_r5_writes) ||
+		(device->raid_level == SA_RAID_6 && !ctrl_info->enable_r6_writes))
+		return true;
+
+	lru_index = 0;
+	oldest_jiffies = INT_MAX;
+	for (i = 0; i < NUM_STREAMS_PER_LUN; i++) {
+		pqi_stream_data = &device->stream_data[i];
+		/*
+		 * Check for adjacent request or request is within
+		 * the previous request.
+		 */
+		if ((pqi_stream_data->next_lba &&
+			rmd.first_block >= pqi_stream_data->next_lba) &&
+			rmd.first_block <= pqi_stream_data->next_lba +
+				rmd.block_cnt) {
+			pqi_stream_data->next_lba = rmd.first_block +
+				rmd.block_cnt;
+			pqi_stream_data->last_accessed = jiffies;
+			return true;
+		}
+
+		/* unused entry */
+		if (pqi_stream_data->last_accessed == 0) {
+			lru_index = i;
+			break;
+		}
+
+		/* Find entry with oldest last accessed time. */
+		if (pqi_stream_data->last_accessed <= oldest_jiffies) {
+			oldest_jiffies = pqi_stream_data->last_accessed;
+			lru_index = i;
+		}
+	}
+
+	/* Set LRU entry. */
+	pqi_stream_data = &device->stream_data[lru_index];
+	pqi_stream_data->last_accessed = jiffies;
+	pqi_stream_data->next_lba = rmd.first_block + rmd.block_cnt;
+
+	return false;
+}
+
+static int pqi_scsi_queue_command(struct Scsi_Host *shost, struct scsi_cmnd *scmd)
+{
+	int rc;
+	struct pqi_ctrl_info *ctrl_info;
+	struct pqi_scsi_dev *device;
+	u16 hw_queue;
+	struct pqi_queue_group *queue_group;
+	bool raid_bypassed;
+
+	device = scmd->device->hostdata;
+
+	if (!device) {
+		set_host_byte(scmd, DID_NO_CONNECT);
+		pqi_scsi_done(scmd);
+		return 0;
+	}
+
+	atomic_inc(&device->scsi_cmds_outstanding[scmd->device->lun]);
+
+	ctrl_info = shost_to_hba(shost);
+
+	if (pqi_ctrl_offline(ctrl_info) || pqi_device_in_remove(device)) {
+		set_host_byte(scmd, DID_NO_CONNECT);
+		pqi_scsi_done(scmd);
+		return 0;
+	}
+
+	if (pqi_ctrl_blocked(ctrl_info)) {
+		rc = SCSI_MLQUEUE_HOST_BUSY;
+		goto out;
+	}
+
+	/*
+	 * This is necessary because the SML doesn't zero out this field during
+	 * error recovery.
+	 */
+	scmd->result = 0;
+
+	hw_queue = pqi_get_hw_queue(ctrl_info, scmd);
+	queue_group = &ctrl_info->queue_groups[hw_queue];
+
+	if (pqi_is_logical_device(device)) {
+		raid_bypassed = false;
+		if (device->raid_bypass_enabled &&
+			pqi_is_bypass_eligible_request(scmd) &&
+			!pqi_is_parity_write_stream(ctrl_info, scmd)) {
+			rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
+			if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY) {
+				raid_bypassed = true;
+				atomic_inc(&device->raid_bypass_cnt);
+			}
+		}
+		if (!raid_bypassed)
+			rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
+	} else {
+		if (device->aio_enabled)
+			rc = pqi_aio_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
+		else
+			rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd, queue_group);
+	}
+
+out:
+	if (rc)
+		atomic_dec(&device->scsi_cmds_outstanding[scmd->device->lun]);
+
+	return rc;
+}
+
+static unsigned int pqi_queued_io_count(struct pqi_ctrl_info *ctrl_info)
+{
+	unsigned int i;
+	unsigned int path;
+	unsigned long flags;
+	unsigned int queued_io_count;
+	struct pqi_queue_group *queue_group;
+	struct pqi_io_request *io_request;
+
+	queued_io_count = 0;
+
+	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
+		queue_group = &ctrl_info->queue_groups[i];
+		for (path = 0; path < 2; path++) {
+			spin_lock_irqsave(&queue_group->submit_lock[path], flags);
+			list_for_each_entry(io_request, &queue_group->request_list[path], request_list_entry)
+				queued_io_count++;
+			spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
+		}
+	}
+
+	return queued_io_count;
+}
+
+static unsigned int pqi_nonempty_inbound_queue_count(struct pqi_ctrl_info *ctrl_info)
+{
+	unsigned int i;
+	unsigned int path;
+	unsigned int nonempty_inbound_queue_count;
+	struct pqi_queue_group *queue_group;
+	pqi_index_t iq_pi;
+	pqi_index_t iq_ci;
+
+	nonempty_inbound_queue_count = 0;
+
+	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
+		queue_group = &ctrl_info->queue_groups[i];
+		for (path = 0; path < 2; path++) {
+			iq_pi = queue_group->iq_pi_copy[path];
+			iq_ci = readl(queue_group->iq_ci[path]);
+			if (iq_ci != iq_pi)
+				nonempty_inbound_queue_count++;
+		}
+	}
+
+	return nonempty_inbound_queue_count;
+}
+
+#define PQI_INBOUND_QUEUES_NONEMPTY_WARNING_TIMEOUT_SECS	10
+
+static int pqi_wait_until_inbound_queues_empty(struct pqi_ctrl_info *ctrl_info)
+{
+	unsigned long start_jiffies;
+	unsigned long warning_timeout;
+	unsigned int queued_io_count;
+	unsigned int nonempty_inbound_queue_count;
+	bool displayed_warning;
+
+	displayed_warning = false;
+	start_jiffies = jiffies;
+	warning_timeout = (PQI_INBOUND_QUEUES_NONEMPTY_WARNING_TIMEOUT_SECS * HZ) + start_jiffies;
+
+	while (1) {
+		queued_io_count = pqi_queued_io_count(ctrl_info);
+		nonempty_inbound_queue_count = pqi_nonempty_inbound_queue_count(ctrl_info);
+		if (queued_io_count == 0 && nonempty_inbound_queue_count == 0)
+			break;
+		pqi_check_ctrl_health(ctrl_info);
+		if (pqi_ctrl_offline(ctrl_info))
+			return -ENXIO;
+		if (time_after(jiffies, warning_timeout)) {
+			dev_warn(&ctrl_info->pci_dev->dev,
+				"waiting %u seconds for queued I/O to drain (queued I/O count: %u; non-empty inbound queue count: %u)\n",
+				jiffies_to_msecs(jiffies - start_jiffies) / 1000, queued_io_count, nonempty_inbound_queue_count);
+			displayed_warning = true;
+			warning_timeout = (PQI_INBOUND_QUEUES_NONEMPTY_WARNING_TIMEOUT_SECS * HZ) + jiffies;
+		}
+		usleep_range(1000, 2000);
+	}
+
+	if (displayed_warning)
+		dev_warn(&ctrl_info->pci_dev->dev,
+			"queued I/O drained after waiting for %u seconds\n",
+			jiffies_to_msecs(jiffies - start_jiffies) / 1000);
+
+	return 0;
+}
+
+static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device)
+{
+	unsigned int i;
+	unsigned int path;
+	struct pqi_queue_group *queue_group;
+	unsigned long flags;
+	struct pqi_io_request *io_request;
+	struct pqi_io_request *next;
+	struct scsi_cmnd *scmd;
+	struct pqi_scsi_dev *scsi_device;
+
+	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
+		queue_group = &ctrl_info->queue_groups[i];
+
+		for (path = 0; path < 2; path++) {
+			spin_lock_irqsave(
+				&queue_group->submit_lock[path], flags);
+
+			list_for_each_entry_safe(io_request, next,
+				&queue_group->request_list[path],
+				request_list_entry) {
+
+				scmd = io_request->scmd;
+				if (!scmd)
+					continue;
+
+				scsi_device = scmd->device->hostdata;
+				if (scsi_device != device)
+					continue;
+
+				list_del(&io_request->request_list_entry);
+				set_host_byte(scmd, DID_RESET);
+				pqi_free_io_request(io_request);
+				scsi_dma_unmap(scmd);
+				pqi_scsi_done(scmd);
+			}
+
+			spin_unlock_irqrestore(
+				&queue_group->submit_lock[path], flags);
+		}
+	}
+}
+
+#define PQI_PENDING_IO_WARNING_TIMEOUT_SECS	10
+
+static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device, u8 lun, unsigned long timeout_msecs)
+{
+	int cmds_outstanding;
+	unsigned long start_jiffies;
+	unsigned long warning_timeout;
+	unsigned long msecs_waiting;
+
+	start_jiffies = jiffies;
+	warning_timeout = (PQI_PENDING_IO_WARNING_TIMEOUT_SECS * HZ) + start_jiffies;
+
+	while ((cmds_outstanding = atomic_read(&device->scsi_cmds_outstanding[lun])) > 0) {
+		if (ctrl_info->ctrl_removal_state != PQI_CTRL_GRACEFUL_REMOVAL) {
+			pqi_check_ctrl_health(ctrl_info);
+			if (pqi_ctrl_offline(ctrl_info))
+				return -ENXIO;
+		}
+		msecs_waiting = jiffies_to_msecs(jiffies - start_jiffies);
+		if (msecs_waiting >= timeout_msecs) {
+			dev_err(&ctrl_info->pci_dev->dev,
+				"scsi %d:%d:%d:%d: timed out after %lu seconds waiting for %d outstanding command(s)\n",
+				ctrl_info->scsi_host->host_no, device->bus, device->target,
+				lun, msecs_waiting / 1000, cmds_outstanding);
+			return -ETIMEDOUT;
+		}
+		if (time_after(jiffies, warning_timeout)) {
+			dev_warn(&ctrl_info->pci_dev->dev,
+				"scsi %d:%d:%d:%d: waiting %lu seconds for %d outstanding command(s)\n",
+				ctrl_info->scsi_host->host_no, device->bus, device->target,
+				lun, msecs_waiting / 1000, cmds_outstanding);
+			warning_timeout = (PQI_PENDING_IO_WARNING_TIMEOUT_SECS * HZ) + jiffies;
+		}
+		usleep_range(1000, 2000);
+	}
+
+	return 0;
+}
+
+static void pqi_lun_reset_complete(struct pqi_io_request *io_request,
+	void *context)
+{
+	struct completion *waiting = context;
+
+	complete(waiting);
+}
+
+#define PQI_LUN_RESET_POLL_COMPLETION_SECS	10
+
+static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_scsi_dev *device, u8 lun, struct completion *wait)
+{
+	int rc;
+	unsigned int wait_secs;
+	int cmds_outstanding;
+
+	wait_secs = 0;
+
+	while (1) {
+		if (wait_for_completion_io_timeout(wait,
+			PQI_LUN_RESET_POLL_COMPLETION_SECS * HZ)) {
+			rc = 0;
+			break;
+		}
+
+		pqi_check_ctrl_health(ctrl_info);
+		if (pqi_ctrl_offline(ctrl_info)) {
+			rc = -ENXIO;
+			break;
+		}
+
+		wait_secs += PQI_LUN_RESET_POLL_COMPLETION_SECS;
+		cmds_outstanding = atomic_read(&device->scsi_cmds_outstanding[lun]);
+		dev_warn(&ctrl_info->pci_dev->dev,
+			"scsi %d:%d:%d:%d: waiting %u seconds for LUN reset to complete (%d command(s) outstanding)\n",
+			ctrl_info->scsi_host->host_no, device->bus, device->target, lun, wait_secs, cmds_outstanding);
+	}
+
+	return rc;
+}
+
+#define PQI_LUN_RESET_FIRMWARE_TIMEOUT_SECS	30
+
+static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info, struct scsi_cmnd *scmd)
+{
+	int rc;
+	struct pqi_io_request *io_request;
+	DECLARE_COMPLETION_ONSTACK(wait);
+	struct pqi_task_management_request *request;
+	struct pqi_scsi_dev *device;
+
+	device = scmd->device->hostdata;
+	io_request = pqi_alloc_io_request(ctrl_info);
+	io_request->io_complete_callback = pqi_lun_reset_complete;
+	io_request->context = &wait;
+
+	request = io_request->iu;
+	memset(request, 0, sizeof(*request));
+
+	request->header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT;
+	put_unaligned_le16(sizeof(*request) - PQI_REQUEST_HEADER_LENGTH,
+		&request->header.iu_length);
+	put_unaligned_le16(io_request->index, &request->request_id);
+	memcpy(request->lun_number, device->scsi3addr,
+		sizeof(request->lun_number));
+	if (!pqi_is_logical_device(device) && ctrl_info->multi_lun_device_supported)
+		request->ml_device_lun_number = (u8)scmd->device->lun;
+	request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET;
+	if (ctrl_info->tmf_iu_timeout_supported)
+		put_unaligned_le16(PQI_LUN_RESET_FIRMWARE_TIMEOUT_SECS, &request->timeout);
+
+	pqi_start_io(ctrl_info, &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
+		io_request);
+
+	rc = pqi_wait_for_lun_reset_completion(ctrl_info, device, (u8)scmd->device->lun, &wait);
+	if (rc == 0)
+		rc = io_request->status;
+
+	pqi_free_io_request(io_request);
+
+	return rc;
+}
+
+#define PQI_LUN_RESET_RETRIES				3
+#define PQI_LUN_RESET_RETRY_INTERVAL_MSECS		(10 * 1000)
+#define PQI_LUN_RESET_PENDING_IO_TIMEOUT_MSECS		(10 * 60 * 1000)
+#define PQI_LUN_RESET_FAILED_PENDING_IO_TIMEOUT_MSECS	(2 * 60 * 1000)
+
+static int pqi_lun_reset_with_retries(struct pqi_ctrl_info *ctrl_info, struct scsi_cmnd *scmd)
+{
+	int reset_rc;
+	int wait_rc;
+	unsigned int retries;
+	unsigned long timeout_msecs;
+	struct pqi_scsi_dev *device;
+
+	device = scmd->device->hostdata;
+	for (retries = 0;;) {
+		reset_rc = pqi_lun_reset(ctrl_info, scmd);
+		if (reset_rc == 0 || reset_rc == -ENODEV || ++retries > PQI_LUN_RESET_RETRIES)
+			break;
+		msleep(PQI_LUN_RESET_RETRY_INTERVAL_MSECS);
+	}
+
+	timeout_msecs = reset_rc ? PQI_LUN_RESET_FAILED_PENDING_IO_TIMEOUT_MSECS :
+		PQI_LUN_RESET_PENDING_IO_TIMEOUT_MSECS;
+
+	wait_rc = pqi_device_wait_for_pending_io(ctrl_info, device, scmd->device->lun, timeout_msecs);
+	if (wait_rc && reset_rc == 0)
+		reset_rc = wait_rc;
+
+	return reset_rc == 0 ? SUCCESS : FAILED;
+}
+
+static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info, struct scsi_cmnd *scmd)
+{
+	int rc;
+	struct pqi_scsi_dev *device;
+
+	device = scmd->device->hostdata;
+	pqi_ctrl_block_requests(ctrl_info);
+	pqi_ctrl_wait_until_quiesced(ctrl_info);
+	pqi_fail_io_queued_for_device(ctrl_info, device);
+	rc = pqi_wait_until_inbound_queues_empty(ctrl_info);
+	if (rc)
+		rc = FAILED;
+	else
+		rc = pqi_lun_reset_with_retries(ctrl_info, scmd);
+	pqi_ctrl_unblock_requests(ctrl_info);
+
+	return rc;
+}
+
+static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd)
+{
+	int rc;
+	struct Scsi_Host *shost;
+	struct pqi_ctrl_info *ctrl_info;
+	struct pqi_scsi_dev *device;
+
+	shost = scmd->device->host;
+	ctrl_info = shost_to_hba(shost);
+	device = scmd->device->hostdata;
+
+	mutex_lock(&ctrl_info->lun_reset_mutex);
+
+	dev_err(&ctrl_info->pci_dev->dev,
+		"resetting scsi %d:%d:%d:%d due to cmd 0x%02x\n",
+		shost->host_no,
+		device->bus, device->target, (u32)scmd->device->lun,
+		scmd->cmd_len > 0 ? scmd->cmnd[0] : 0xff);
+
+	pqi_check_ctrl_health(ctrl_info);
+	if (pqi_ctrl_offline(ctrl_info))
+		rc = FAILED;
+	else
+		rc = pqi_device_reset(ctrl_info, scmd);
+
+	dev_err(&ctrl_info->pci_dev->dev,
+		"reset of scsi %d:%d:%d:%d: %s\n",
+		shost->host_no, device->bus, device->target, (u32)scmd->device->lun,
+		rc == SUCCESS ? "SUCCESS" : "FAILED");
+
+	mutex_unlock(&ctrl_info->lun_reset_mutex);
+
+	return rc;
+}
+
+static int pqi_slave_alloc(struct scsi_device *sdev)
+{
+	struct pqi_scsi_dev *device;
+	unsigned long flags;
+	struct pqi_ctrl_info *ctrl_info;
+	struct scsi_target *starget;
+	struct sas_rphy *rphy;
+
+	ctrl_info = shost_to_hba(sdev->host);
+
+	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+
+	if (sdev_channel(sdev) == PQI_PHYSICAL_DEVICE_BUS) {
+		starget = scsi_target(sdev);
+		rphy = target_to_rphy(starget);
+		device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
+		if (device) {
+			if (device->target_lun_valid) {
+				device->ignore_device = true;
+			} else {
+				device->target = sdev_id(sdev);
+				device->lun = sdev->lun;
+				device->target_lun_valid = true;
+			}
+		}
+	} else {
+		device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev),
+			sdev_id(sdev), sdev->lun);
+	}
+
+	if (device) {
+		sdev->hostdata = device;
+		device->sdev = sdev;
+		if (device->queue_depth) {
+			device->advertised_queue_depth = device->queue_depth;
+			scsi_change_queue_depth(sdev,
+				device->advertised_queue_depth);
+		}
+		if (pqi_is_logical_device(device)) {
+			pqi_disable_write_same(sdev);
+		} else {
+			sdev->allow_restart = 1;
+			if (device->device_type == SA_DEVICE_TYPE_NVME)
+				pqi_disable_write_same(sdev);
+		}
+	}
+
+	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+	return 0;
+}
+
+static void pqi_map_queues(struct Scsi_Host *shost)
+{
+	struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
+
+	blk_mq_pci_map_queues(&shost->tag_set.map[HCTX_TYPE_DEFAULT],
+			      ctrl_info->pci_dev, 0);
+}
+
+static inline bool pqi_is_tape_changer_device(struct pqi_scsi_dev *device)
+{
+	return device->devtype == TYPE_TAPE || device->devtype == TYPE_MEDIUM_CHANGER;
+}
+
+static int pqi_slave_configure(struct scsi_device *sdev)
+{
+	int rc = 0;
+	struct pqi_scsi_dev *device;
+
+	device = sdev->hostdata;
+	device->devtype = sdev->type;
+
+	if (pqi_is_tape_changer_device(device) && device->ignore_device) {
+		rc = -ENXIO;
+		device->ignore_device = false;
+	}
+
+	return rc;
+}
+
+static void pqi_slave_destroy(struct scsi_device *sdev)
+{
+	struct pqi_ctrl_info *ctrl_info;
+	struct pqi_scsi_dev *device;
+	int mutex_acquired;
+	unsigned long flags;
+
+	ctrl_info = shost_to_hba(sdev->host);
+
+	mutex_acquired = mutex_trylock(&ctrl_info->scan_mutex);
+	if (!mutex_acquired)
+		return;
+
+	device = sdev->hostdata;
+	if (!device) {
+		mutex_unlock(&ctrl_info->scan_mutex);
+		return;
+	}
+
+	device->lun_count--;
+	if (device->lun_count > 0) {
+		mutex_unlock(&ctrl_info->scan_mutex);
+		return;
+	}
+
+	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+	list_del(&device->scsi_device_list_entry);
+	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+	mutex_unlock(&ctrl_info->scan_mutex);
+
+	pqi_dev_info(ctrl_info, "removed", device);
+	pqi_free_device(device);
+}
+
+static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
+{
+	struct pci_dev *pci_dev;
+	u32 subsystem_vendor;
+	u32 subsystem_device;
+	cciss_pci_info_struct pciinfo;
+
+	if (!arg)
+		return -EINVAL;
+
+	pci_dev = ctrl_info->pci_dev;
+
+	pciinfo.domain = pci_domain_nr(pci_dev->bus);
+	pciinfo.bus = pci_dev->bus->number;
+	pciinfo.dev_fn = pci_dev->devfn;
+	subsystem_vendor = pci_dev->subsystem_vendor;
+	subsystem_device = pci_dev->subsystem_device;
+	pciinfo.board_id = ((subsystem_device << 16) & 0xffff0000) | subsystem_vendor;
+
+	if (copy_to_user(arg, &pciinfo, sizeof(pciinfo)))
+		return -EFAULT;
+
+	return 0;
+}
+
+static int pqi_getdrivver_ioctl(void __user *arg)
+{
+	u32 version;
+
+	if (!arg)
+		return -EINVAL;
+
+	version = (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) |
+		(DRIVER_RELEASE << 16) | DRIVER_REVISION;
+
+	if (copy_to_user(arg, &version, sizeof(version)))
+		return -EFAULT;
+
+	return 0;
+}
+
+struct ciss_error_info {
+	u8	scsi_status;
+	int	command_status;
+	size_t	sense_data_length;
+};
+
+static void pqi_error_info_to_ciss(struct pqi_raid_error_info *pqi_error_info,
+	struct ciss_error_info *ciss_error_info)
+{
+	int ciss_cmd_status;
+	size_t sense_data_length;
+
+	switch (pqi_error_info->data_out_result) {
+	case PQI_DATA_IN_OUT_GOOD:
+		ciss_cmd_status = CISS_CMD_STATUS_SUCCESS;
+		break;
+	case PQI_DATA_IN_OUT_UNDERFLOW:
+		ciss_cmd_status = CISS_CMD_STATUS_DATA_UNDERRUN;
+		break;
+	case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
+		ciss_cmd_status = CISS_CMD_STATUS_DATA_OVERRUN;
+		break;
+	case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
+	case PQI_DATA_IN_OUT_BUFFER_ERROR:
+	case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
+	case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
+	case PQI_DATA_IN_OUT_ERROR:
+		ciss_cmd_status = CISS_CMD_STATUS_PROTOCOL_ERROR;
+		break;
+	case PQI_DATA_IN_OUT_HARDWARE_ERROR:
+	case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
+	case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
+	case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
+	case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
+	case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
+	case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
+	case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
+	case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
+	case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
+		ciss_cmd_status = CISS_CMD_STATUS_HARDWARE_ERROR;
+		break;
+	case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
+		ciss_cmd_status = CISS_CMD_STATUS_UNSOLICITED_ABORT;
+		break;
+	case PQI_DATA_IN_OUT_ABORTED:
+		ciss_cmd_status = CISS_CMD_STATUS_ABORTED;
+		break;
+	case PQI_DATA_IN_OUT_TIMEOUT:
+		ciss_cmd_status = CISS_CMD_STATUS_TIMEOUT;
+		break;
+	default:
+		ciss_cmd_status = CISS_CMD_STATUS_TARGET_STATUS;
+		break;
+	}
+
+	sense_data_length =
+		get_unaligned_le16(&pqi_error_info->sense_data_length);
+	if (sense_data_length == 0)
+		sense_data_length =
+		get_unaligned_le16(&pqi_error_info->response_data_length);
+	if (sense_data_length)
+		if (sense_data_length > sizeof(pqi_error_info->data))
+			sense_data_length = sizeof(pqi_error_info->data);
+
+	ciss_error_info->scsi_status = pqi_error_info->status;
+	ciss_error_info->command_status = ciss_cmd_status;
+	ciss_error_info->sense_data_length = sense_data_length;
+}
+
+static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
+{
+	int rc;
+	char *kernel_buffer = NULL;
+	u16 iu_length;
+	size_t sense_data_length;
+	IOCTL_Command_struct iocommand;
+	struct pqi_raid_path_request request;
+	struct pqi_raid_error_info pqi_error_info;
+	struct ciss_error_info ciss_error_info;
+
+	if (pqi_ctrl_offline(ctrl_info))
+		return -ENXIO;
+	if (pqi_ofa_in_progress(ctrl_info) && pqi_ctrl_blocked(ctrl_info))
+		return -EBUSY;
+	if (!arg)
+		return -EINVAL;
+	if (!capable(CAP_SYS_RAWIO))
+		return -EPERM;
+	if (copy_from_user(&iocommand, arg, sizeof(iocommand)))
+		return -EFAULT;
+	if (iocommand.buf_size < 1 &&
+		iocommand.Request.Type.Direction != XFER_NONE)
+		return -EINVAL;
+	if (iocommand.Request.CDBLen > sizeof(request.cdb))
+		return -EINVAL;
+	if (iocommand.Request.Type.Type != TYPE_CMD)
+		return -EINVAL;
+
+	switch (iocommand.Request.Type.Direction) {
+	case XFER_NONE:
+	case XFER_WRITE:
+	case XFER_READ:
+	case XFER_READ | XFER_WRITE:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (iocommand.buf_size > 0) {
+		kernel_buffer = kmalloc(iocommand.buf_size, GFP_KERNEL);
+		if (!kernel_buffer)
+			return -ENOMEM;
+		if (iocommand.Request.Type.Direction & XFER_WRITE) {
+			if (copy_from_user(kernel_buffer, iocommand.buf,
+				iocommand.buf_size)) {
+				rc = -EFAULT;
+				goto out;
+			}
+		} else {
+			memset(kernel_buffer, 0, iocommand.buf_size);
+		}
+	}
+
+	memset(&request, 0, sizeof(request));
+
+	request.header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
+	iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
+		PQI_REQUEST_HEADER_LENGTH;
+	memcpy(request.lun_number, iocommand.LUN_info.LunAddrBytes,
+		sizeof(request.lun_number));
+	memcpy(request.cdb, iocommand.Request.CDB, iocommand.Request.CDBLen);
+	request.additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
+
+	switch (iocommand.Request.Type.Direction) {
+	case XFER_NONE:
+		request.data_direction = SOP_NO_DIRECTION_FLAG;
+		break;
+	case XFER_WRITE:
+		request.data_direction = SOP_WRITE_FLAG;
+		break;
+	case XFER_READ:
+		request.data_direction = SOP_READ_FLAG;
+		break;
+	case XFER_READ | XFER_WRITE:
+		request.data_direction = SOP_BIDIRECTIONAL;
+		break;
+	}
+
+	request.task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
+
+	if (iocommand.buf_size > 0) {
+		put_unaligned_le32(iocommand.buf_size, &request.buffer_length);
+
+		rc = pqi_map_single(ctrl_info->pci_dev,
+			&request.sg_descriptors[0], kernel_buffer,
+			iocommand.buf_size, DMA_BIDIRECTIONAL);
+		if (rc)
+			goto out;
+
+		iu_length += sizeof(request.sg_descriptors[0]);
+	}
+
+	put_unaligned_le16(iu_length, &request.header.iu_length);
+
+	if (ctrl_info->raid_iu_timeout_supported)
+		put_unaligned_le32(iocommand.Request.Timeout, &request.timeout);
+
+	rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
+		PQI_SYNC_FLAGS_INTERRUPTABLE, &pqi_error_info);
+
+	if (iocommand.buf_size > 0)
+		pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
+			DMA_BIDIRECTIONAL);
+
+	memset(&iocommand.error_info, 0, sizeof(iocommand.error_info));
+
+	if (rc == 0) {
+		pqi_error_info_to_ciss(&pqi_error_info, &ciss_error_info);
+		iocommand.error_info.ScsiStatus = ciss_error_info.scsi_status;
+		iocommand.error_info.CommandStatus =
+			ciss_error_info.command_status;
+		sense_data_length = ciss_error_info.sense_data_length;
+		if (sense_data_length) {
+			if (sense_data_length >
+				sizeof(iocommand.error_info.SenseInfo))
+				sense_data_length =
+					sizeof(iocommand.error_info.SenseInfo);
+			memcpy(iocommand.error_info.SenseInfo,
+				pqi_error_info.data, sense_data_length);
+			iocommand.error_info.SenseLen = sense_data_length;
+		}
+	}
+
+	if (copy_to_user(arg, &iocommand, sizeof(iocommand))) {
+		rc = -EFAULT;
+		goto out;
+	}
+
+	if (rc == 0 && iocommand.buf_size > 0 &&
+		(iocommand.Request.Type.Direction & XFER_READ)) {
+		if (copy_to_user(iocommand.buf, kernel_buffer,
+			iocommand.buf_size)) {
+			rc = -EFAULT;
+		}
+	}
+
+out:
+	kfree(kernel_buffer);
+
+	return rc;
+}
+
+static int pqi_ioctl(struct scsi_device *sdev, unsigned int cmd,
+		     void __user *arg)
+{
+	int rc;
+	struct pqi_ctrl_info *ctrl_info;
+
+	ctrl_info = shost_to_hba(sdev->host);
+
+	switch (cmd) {
+	case CCISS_DEREGDISK:
+	case CCISS_REGNEWDISK:
+	case CCISS_REGNEWD:
+		rc = pqi_scan_scsi_devices(ctrl_info);
+		break;
+	case CCISS_GETPCIINFO:
+		rc = pqi_getpciinfo_ioctl(ctrl_info, arg);
+		break;
+	case CCISS_GETDRIVVER:
+		rc = pqi_getdrivver_ioctl(arg);
+		break;
+	case CCISS_PASSTHRU:
+		rc = pqi_passthru_ioctl(ctrl_info, arg);
+		break;
+	default:
+		rc = -EINVAL;
+		break;
+	}
+
+	return rc;
+}
+
+static ssize_t pqi_firmware_version_show(struct device *dev,
+	struct device_attribute *attr, char *buffer)
+{
+	struct Scsi_Host *shost;
+	struct pqi_ctrl_info *ctrl_info;
+
+	shost = class_to_shost(dev);
+	ctrl_info = shost_to_hba(shost);
+
+	return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->firmware_version);
+}
+
+static ssize_t pqi_driver_version_show(struct device *dev,
+	struct device_attribute *attr, char *buffer)
+{
+	return scnprintf(buffer, PAGE_SIZE, "%s\n", DRIVER_VERSION BUILD_TIMESTAMP);
+}
+
+static ssize_t pqi_serial_number_show(struct device *dev,
+	struct device_attribute *attr, char *buffer)
+{
+	struct Scsi_Host *shost;
+	struct pqi_ctrl_info *ctrl_info;
+
+	shost = class_to_shost(dev);
+	ctrl_info = shost_to_hba(shost);
+
+	return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->serial_number);
+}
+
+static ssize_t pqi_model_show(struct device *dev,
+	struct device_attribute *attr, char *buffer)
+{
+	struct Scsi_Host *shost;
+	struct pqi_ctrl_info *ctrl_info;
+
+	shost = class_to_shost(dev);
+	ctrl_info = shost_to_hba(shost);
+
+	return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->model);
+}
+
+static ssize_t pqi_vendor_show(struct device *dev,
+	struct device_attribute *attr, char *buffer)
+{
+	struct Scsi_Host *shost;
+	struct pqi_ctrl_info *ctrl_info;
+
+	shost = class_to_shost(dev);
+	ctrl_info = shost_to_hba(shost);
+
+	return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->vendor);
+}
+
+static ssize_t pqi_host_rescan_store(struct device *dev,
+	struct device_attribute *attr, const char *buffer, size_t count)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+
+	pqi_scan_start(shost);
+
+	return count;
+}
+
+static ssize_t pqi_lockup_action_show(struct device *dev,
+	struct device_attribute *attr, char *buffer)
+{
+	int count = 0;
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
+		if (pqi_lockup_actions[i].action == pqi_lockup_action)
+			count += scnprintf(buffer + count, PAGE_SIZE - count,
+				"[%s] ", pqi_lockup_actions[i].name);
+		else
+			count += scnprintf(buffer + count, PAGE_SIZE - count,
+				"%s ", pqi_lockup_actions[i].name);
+	}
+
+	count += scnprintf(buffer + count, PAGE_SIZE - count, "\n");
+
+	return count;
+}
+
+static ssize_t pqi_lockup_action_store(struct device *dev,
+	struct device_attribute *attr, const char *buffer, size_t count)
+{
+	unsigned int i;
+	char *action_name;
+	char action_name_buffer[32];
+
+	strlcpy(action_name_buffer, buffer, sizeof(action_name_buffer));
+	action_name = strstrip(action_name_buffer);
+
+	for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
+		if (strcmp(action_name, pqi_lockup_actions[i].name) == 0) {
+			pqi_lockup_action = pqi_lockup_actions[i].action;
+			return count;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static ssize_t pqi_host_enable_stream_detection_show(struct device *dev,
+	struct device_attribute *attr, char *buffer)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
+
+	return scnprintf(buffer, 10, "%x\n",
+			ctrl_info->enable_stream_detection);
+}
+
+static ssize_t pqi_host_enable_stream_detection_store(struct device *dev,
+	struct device_attribute *attr, const char *buffer, size_t count)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
+	u8 set_stream_detection = 0;
+
+	if (kstrtou8(buffer, 0, &set_stream_detection))
+		return -EINVAL;
+
+	if (set_stream_detection > 0)
+		set_stream_detection = 1;
+
+	ctrl_info->enable_stream_detection = set_stream_detection;
+
+	return count;
+}
+
+static ssize_t pqi_host_enable_r5_writes_show(struct device *dev,
+	struct device_attribute *attr, char *buffer)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
+
+	return scnprintf(buffer, 10, "%x\n", ctrl_info->enable_r5_writes);
+}
+
+static ssize_t pqi_host_enable_r5_writes_store(struct device *dev,
+	struct device_attribute *attr, const char *buffer, size_t count)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
+	u8 set_r5_writes = 0;
+
+	if (kstrtou8(buffer, 0, &set_r5_writes))
+		return -EINVAL;
+
+	if (set_r5_writes > 0)
+		set_r5_writes = 1;
+
+	ctrl_info->enable_r5_writes = set_r5_writes;
+
+	return count;
+}
+
+static ssize_t pqi_host_enable_r6_writes_show(struct device *dev,
+	struct device_attribute *attr, char *buffer)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
+
+	return scnprintf(buffer, 10, "%x\n", ctrl_info->enable_r6_writes);
+}
+
+static ssize_t pqi_host_enable_r6_writes_store(struct device *dev,
+	struct device_attribute *attr, const char *buffer, size_t count)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+	struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
+	u8 set_r6_writes = 0;
+
+	if (kstrtou8(buffer, 0, &set_r6_writes))
+		return -EINVAL;
+
+	if (set_r6_writes > 0)
+		set_r6_writes = 1;
+
+	ctrl_info->enable_r6_writes = set_r6_writes;
+
+	return count;
+}
+
+static DEVICE_ATTR(driver_version, 0444, pqi_driver_version_show, NULL);
+static DEVICE_ATTR(firmware_version, 0444, pqi_firmware_version_show, NULL);
+static DEVICE_ATTR(model, 0444, pqi_model_show, NULL);
+static DEVICE_ATTR(serial_number, 0444, pqi_serial_number_show, NULL);
+static DEVICE_ATTR(vendor, 0444, pqi_vendor_show, NULL);
+static DEVICE_ATTR(rescan, 0200, NULL, pqi_host_rescan_store);
+static DEVICE_ATTR(lockup_action, 0644, pqi_lockup_action_show,
+	pqi_lockup_action_store);
+static DEVICE_ATTR(enable_stream_detection, 0644,
+	pqi_host_enable_stream_detection_show,
+	pqi_host_enable_stream_detection_store);
+static DEVICE_ATTR(enable_r5_writes, 0644,
+	pqi_host_enable_r5_writes_show, pqi_host_enable_r5_writes_store);
+static DEVICE_ATTR(enable_r6_writes, 0644,
+	pqi_host_enable_r6_writes_show, pqi_host_enable_r6_writes_store);
+
+static struct attribute *pqi_shost_attrs[] = {
+	&dev_attr_driver_version.attr,
+	&dev_attr_firmware_version.attr,
+	&dev_attr_model.attr,
+	&dev_attr_serial_number.attr,
+	&dev_attr_vendor.attr,
+	&dev_attr_rescan.attr,
+	&dev_attr_lockup_action.attr,
+	&dev_attr_enable_stream_detection.attr,
+	&dev_attr_enable_r5_writes.attr,
+	&dev_attr_enable_r6_writes.attr,
+	NULL
+};
+
+ATTRIBUTE_GROUPS(pqi_shost);
+
+static ssize_t pqi_unique_id_show(struct device *dev,
+	struct device_attribute *attr, char *buffer)
+{
+	struct pqi_ctrl_info *ctrl_info;
+	struct scsi_device *sdev;
+	struct pqi_scsi_dev *device;
+	unsigned long flags;
+	u8 unique_id[16];
+
+	sdev = to_scsi_device(dev);
+	ctrl_info = shost_to_hba(sdev->host);
+
+	if (pqi_ctrl_offline(ctrl_info))
+		return -ENODEV;
+
+	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+
+	device = sdev->hostdata;
+	if (!device) {
+		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+		return -ENODEV;
+	}
+
+	if (device->is_physical_device)
+		memcpy(unique_id, device->wwid, sizeof(device->wwid));
+	else
+		memcpy(unique_id, device->volume_id, sizeof(device->volume_id));
+
+	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+	return scnprintf(buffer, PAGE_SIZE,
+		"%02X%02X%02X%02X%02X%02X%02X%02X"
+		"%02X%02X%02X%02X%02X%02X%02X%02X\n",
+		unique_id[0], unique_id[1], unique_id[2], unique_id[3],
+		unique_id[4], unique_id[5], unique_id[6], unique_id[7],
+		unique_id[8], unique_id[9], unique_id[10], unique_id[11],
+		unique_id[12], unique_id[13], unique_id[14], unique_id[15]);
+}
+
+static ssize_t pqi_lunid_show(struct device *dev,
+	struct device_attribute *attr, char *buffer)
+{
+	struct pqi_ctrl_info *ctrl_info;
+	struct scsi_device *sdev;
+	struct pqi_scsi_dev *device;
+	unsigned long flags;
+	u8 lunid[8];
+
+	sdev = to_scsi_device(dev);
+	ctrl_info = shost_to_hba(sdev->host);
+
+	if (pqi_ctrl_offline(ctrl_info))
+		return -ENODEV;
+
+	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+
+	device = sdev->hostdata;
+	if (!device) {
+		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+		return -ENODEV;
+	}
+
+	memcpy(lunid, device->scsi3addr, sizeof(lunid));
+
+	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+	return scnprintf(buffer, PAGE_SIZE, "0x%8phN\n", lunid);
+}
+
+#define MAX_PATHS	8
+
+static ssize_t pqi_path_info_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct pqi_ctrl_info *ctrl_info;
+	struct scsi_device *sdev;
+	struct pqi_scsi_dev *device;
+	unsigned long flags;
+	int i;
+	int output_len = 0;
+	u8 box;
+	u8 bay;
+	u8 path_map_index;
+	char *active;
+	u8 phys_connector[2];
+
+	sdev = to_scsi_device(dev);
+	ctrl_info = shost_to_hba(sdev->host);
+
+	if (pqi_ctrl_offline(ctrl_info))
+		return -ENODEV;
+
+	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+
+	device = sdev->hostdata;
+	if (!device) {
+		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+		return -ENODEV;
+	}
+
+	bay = device->bay;
+	for (i = 0; i < MAX_PATHS; i++) {
+		path_map_index = 1 << i;
+		if (i == device->active_path_index)
+			active = "Active";
+		else if (device->path_map & path_map_index)
+			active = "Inactive";
+		else
+			continue;
+
+		output_len += scnprintf(buf + output_len,
+					PAGE_SIZE - output_len,
+					"[%d:%d:%d:%d] %20.20s ",
+					ctrl_info->scsi_host->host_no,
+					device->bus, device->target,
+					device->lun,
+					scsi_device_type(device->devtype));
+
+		if (device->devtype == TYPE_RAID ||
+			pqi_is_logical_device(device))
+			goto end_buffer;
+
+		memcpy(&phys_connector, &device->phys_connector[i],
+			sizeof(phys_connector));
+		if (phys_connector[0] < '0')
+			phys_connector[0] = '0';
+		if (phys_connector[1] < '0')
+			phys_connector[1] = '0';
+
+		output_len += scnprintf(buf + output_len,
+					PAGE_SIZE - output_len,
+					"PORT: %.2s ", phys_connector);
+
+		box = device->box[i];
+		if (box != 0 && box != 0xFF)
+			output_len += scnprintf(buf + output_len,
+						PAGE_SIZE - output_len,
+						"BOX: %hhu ", box);
+
+		if ((device->devtype == TYPE_DISK ||
+			device->devtype == TYPE_ZBC) &&
+			pqi_expose_device(device))
+			output_len += scnprintf(buf + output_len,
+						PAGE_SIZE - output_len,
+						"BAY: %hhu ", bay);
+
+end_buffer:
+		output_len += scnprintf(buf + output_len,
+					PAGE_SIZE - output_len,
+					"%s\n", active);
+	}
+
+	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+	return output_len;
+}
+
+static ssize_t pqi_sas_address_show(struct device *dev,
+	struct device_attribute *attr, char *buffer)
+{
+	struct pqi_ctrl_info *ctrl_info;
+	struct scsi_device *sdev;
+	struct pqi_scsi_dev *device;
+	unsigned long flags;
+	u64 sas_address;
+
+	sdev = to_scsi_device(dev);
+	ctrl_info = shost_to_hba(sdev->host);
+
+	if (pqi_ctrl_offline(ctrl_info))
+		return -ENODEV;
+
+	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+
+	device = sdev->hostdata;
+	if (!device) {
+		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+		return -ENODEV;
+	}
+
+	sas_address = device->sas_address;
+
+	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+	return scnprintf(buffer, PAGE_SIZE, "0x%016llx\n", sas_address);
+}
+
+static ssize_t pqi_ssd_smart_path_enabled_show(struct device *dev,
+	struct device_attribute *attr, char *buffer)
+{
+	struct pqi_ctrl_info *ctrl_info;
+	struct scsi_device *sdev;
+	struct pqi_scsi_dev *device;
+	unsigned long flags;
+
+	sdev = to_scsi_device(dev);
+	ctrl_info = shost_to_hba(sdev->host);
+
+	if (pqi_ctrl_offline(ctrl_info))
+		return -ENODEV;
+
+	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+
+	device = sdev->hostdata;
+	if (!device) {
+		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+		return -ENODEV;
+	}
+
+	buffer[0] = device->raid_bypass_enabled ? '1' : '0';
+	buffer[1] = '\n';
+	buffer[2] = '\0';
+
+	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+	return 2;
+}
+
+static ssize_t pqi_raid_level_show(struct device *dev,
+	struct device_attribute *attr, char *buffer)
+{
+	struct pqi_ctrl_info *ctrl_info;
+	struct scsi_device *sdev;
+	struct pqi_scsi_dev *device;
+	unsigned long flags;
+	char *raid_level;
+
+	sdev = to_scsi_device(dev);
+	ctrl_info = shost_to_hba(sdev->host);
+
+	if (pqi_ctrl_offline(ctrl_info))
+		return -ENODEV;
+
+	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+
+	device = sdev->hostdata;
+	if (!device) {
+		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+		return -ENODEV;
+	}
+
+	if (pqi_is_logical_device(device))
+		raid_level = pqi_raid_level_to_string(device->raid_level);
+	else
+		raid_level = "N/A";
+
+	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+	return scnprintf(buffer, PAGE_SIZE, "%s\n", raid_level);
+}
+
+static ssize_t pqi_raid_bypass_cnt_show(struct device *dev,
+	struct device_attribute *attr, char *buffer)
+{
+	struct pqi_ctrl_info *ctrl_info;
+	struct scsi_device *sdev;
+	struct pqi_scsi_dev *device;
+	unsigned long flags;
+	int raid_bypass_cnt;
+
+	sdev = to_scsi_device(dev);
+	ctrl_info = shost_to_hba(sdev->host);
+
+	if (pqi_ctrl_offline(ctrl_info))
+		return -ENODEV;
+
+	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+
+	device = sdev->hostdata;
+	if (!device) {
+		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+		return -ENODEV;
+	}
+
+	raid_bypass_cnt = atomic_read(&device->raid_bypass_cnt);
+
+	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+	return scnprintf(buffer, PAGE_SIZE, "0x%x\n", raid_bypass_cnt);
+}
+
+static ssize_t pqi_sas_ncq_prio_enable_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct pqi_ctrl_info *ctrl_info;
+	struct scsi_device *sdev;
+	struct pqi_scsi_dev *device;
+	unsigned long flags;
+	int output_len = 0;
+
+	sdev = to_scsi_device(dev);
+	ctrl_info = shost_to_hba(sdev->host);
+
+	if (pqi_ctrl_offline(ctrl_info))
+		return -ENODEV;
+
+	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+
+	device = sdev->hostdata;
+	if (!device) {
+		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+		return -ENODEV;
+	}
+
+	output_len = snprintf(buf, PAGE_SIZE, "%d\n",
+				device->ncq_prio_enable);
+	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+	return output_len;
+}
+
+static ssize_t pqi_sas_ncq_prio_enable_store(struct device *dev,
+			struct device_attribute *attr,
+			const char *buf, size_t count)
+{
+	struct pqi_ctrl_info *ctrl_info;
+	struct scsi_device *sdev;
+	struct pqi_scsi_dev *device;
+	unsigned long flags;
+	u8 ncq_prio_enable = 0;
+
+	if (kstrtou8(buf, 0, &ncq_prio_enable))
+		return -EINVAL;
+
+	sdev = to_scsi_device(dev);
+	ctrl_info = shost_to_hba(sdev->host);
+
+	spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+
+	device = sdev->hostdata;
+
+	if (!device) {
+		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+		return -ENODEV;
+	}
+
+	if (!device->ncq_prio_support ||
+		!device->is_physical_device) {
+		spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+		return -EINVAL;
+	}
+
+	device->ncq_prio_enable = ncq_prio_enable;
+
+	spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+	return  strlen(buf);
+}
+
+static DEVICE_ATTR(lunid, 0444, pqi_lunid_show, NULL);
+static DEVICE_ATTR(unique_id, 0444, pqi_unique_id_show, NULL);
+static DEVICE_ATTR(path_info, 0444, pqi_path_info_show, NULL);
+static DEVICE_ATTR(sas_address, 0444, pqi_sas_address_show, NULL);
+static DEVICE_ATTR(ssd_smart_path_enabled, 0444, pqi_ssd_smart_path_enabled_show, NULL);
+static DEVICE_ATTR(raid_level, 0444, pqi_raid_level_show, NULL);
+static DEVICE_ATTR(raid_bypass_cnt, 0444, pqi_raid_bypass_cnt_show, NULL);
+static DEVICE_ATTR(sas_ncq_prio_enable, 0644,
+		pqi_sas_ncq_prio_enable_show, pqi_sas_ncq_prio_enable_store);
+
+static struct attribute *pqi_sdev_attrs[] = {
+	&dev_attr_lunid.attr,
+	&dev_attr_unique_id.attr,
+	&dev_attr_path_info.attr,
+	&dev_attr_sas_address.attr,
+	&dev_attr_ssd_smart_path_enabled.attr,
+	&dev_attr_raid_level.attr,
+	&dev_attr_raid_bypass_cnt.attr,
+	&dev_attr_sas_ncq_prio_enable.attr,
+	NULL
+};
+
+ATTRIBUTE_GROUPS(pqi_sdev);
+
+static struct scsi_host_template pqi_driver_template = {
+	.module = THIS_MODULE,
+	.name = DRIVER_NAME_SHORT,
+	.proc_name = DRIVER_NAME_SHORT,
+	.queuecommand = pqi_scsi_queue_command,
+	.scan_start = pqi_scan_start,
+	.scan_finished = pqi_scan_finished,
+	.this_id = -1,
+	.eh_device_reset_handler = pqi_eh_device_reset_handler,
+	.ioctl = pqi_ioctl,
+	.slave_alloc = pqi_slave_alloc,
+	.slave_configure = pqi_slave_configure,
+	.slave_destroy = pqi_slave_destroy,
+	.map_queues = pqi_map_queues,
+	.sdev_groups = pqi_sdev_groups,
+	.shost_groups = pqi_shost_groups,
+	.cmd_size = sizeof(struct pqi_cmd_priv),
+};
+
+static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info)
+{
+	int rc;
+	struct Scsi_Host *shost;
+
+	shost = scsi_host_alloc(&pqi_driver_template, sizeof(ctrl_info));
+	if (!shost) {
+		dev_err(&ctrl_info->pci_dev->dev, "scsi_host_alloc failed\n");
+		return -ENOMEM;
+	}
+
+	shost->io_port = 0;
+	shost->n_io_port = 0;
+	shost->this_id = -1;
+	shost->max_channel = PQI_MAX_BUS;
+	shost->max_cmd_len = MAX_COMMAND_SIZE;
+	shost->max_lun = PQI_MAX_LUNS_PER_DEVICE;
+	shost->max_lun = ~0;
+	shost->max_id = ~0;
+	shost->max_sectors = ctrl_info->max_sectors;
+	shost->can_queue = ctrl_info->scsi_ml_can_queue;
+	shost->cmd_per_lun = shost->can_queue;
+	shost->sg_tablesize = ctrl_info->sg_tablesize;
+	shost->transportt = pqi_sas_transport_template;
+	shost->irq = pci_irq_vector(ctrl_info->pci_dev, 0);
+	shost->unique_id = shost->irq;
+	shost->nr_hw_queues = ctrl_info->num_queue_groups;
+	shost->host_tagset = 1;
+	shost->hostdata[0] = (unsigned long)ctrl_info;
+
+	rc = scsi_add_host(shost, &ctrl_info->pci_dev->dev);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev, "scsi_add_host failed\n");
+		goto free_host;
+	}
+
+	rc = pqi_add_sas_host(shost, ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev, "add SAS host failed\n");
+		goto remove_host;
+	}
+
+	ctrl_info->scsi_host = shost;
+
+	return 0;
+
+remove_host:
+	scsi_remove_host(shost);
+free_host:
+	scsi_host_put(shost);
+
+	return rc;
+}
+
+static void pqi_unregister_scsi(struct pqi_ctrl_info *ctrl_info)
+{
+	struct Scsi_Host *shost;
+
+	pqi_delete_sas_host(ctrl_info);
+
+	shost = ctrl_info->scsi_host;
+	if (!shost)
+		return;
+
+	scsi_remove_host(shost);
+	scsi_host_put(shost);
+}
+
+static int pqi_wait_for_pqi_reset_completion(struct pqi_ctrl_info *ctrl_info)
+{
+	int rc = 0;
+	struct pqi_device_registers __iomem *pqi_registers;
+	unsigned long timeout;
+	unsigned int timeout_msecs;
+	union pqi_reset_register reset_reg;
+
+	pqi_registers = ctrl_info->pqi_registers;
+	timeout_msecs = readw(&pqi_registers->max_reset_timeout) * 100;
+	timeout = msecs_to_jiffies(timeout_msecs) + jiffies;
+
+	while (1) {
+		msleep(PQI_RESET_POLL_INTERVAL_MSECS);
+		reset_reg.all_bits = readl(&pqi_registers->device_reset);
+		if (reset_reg.bits.reset_action == PQI_RESET_ACTION_COMPLETED)
+			break;
+		if (!sis_is_firmware_running(ctrl_info)) {
+			rc = -ENXIO;
+			break;
+		}
+		if (time_after(jiffies, timeout)) {
+			rc = -ETIMEDOUT;
+			break;
+		}
+	}
+
+	return rc;
+}
+
+static int pqi_reset(struct pqi_ctrl_info *ctrl_info)
+{
+	int rc;
+	union pqi_reset_register reset_reg;
+
+	if (ctrl_info->pqi_reset_quiesce_supported) {
+		rc = sis_pqi_reset_quiesce(ctrl_info);
+		if (rc) {
+			dev_err(&ctrl_info->pci_dev->dev,
+				"PQI reset failed during quiesce with error %d\n", rc);
+			return rc;
+		}
+	}
+
+	reset_reg.all_bits = 0;
+	reset_reg.bits.reset_type = PQI_RESET_TYPE_HARD_RESET;
+	reset_reg.bits.reset_action = PQI_RESET_ACTION_RESET;
+
+	writel(reset_reg.all_bits, &ctrl_info->pqi_registers->device_reset);
+
+	rc = pqi_wait_for_pqi_reset_completion(ctrl_info);
+	if (rc)
+		dev_err(&ctrl_info->pci_dev->dev,
+			"PQI reset failed with error %d\n", rc);
+
+	return rc;
+}
+
+static int pqi_get_ctrl_serial_number(struct pqi_ctrl_info *ctrl_info)
+{
+	int rc;
+	struct bmic_sense_subsystem_info *sense_info;
+
+	sense_info = kzalloc(sizeof(*sense_info), GFP_KERNEL);
+	if (!sense_info)
+		return -ENOMEM;
+
+	rc = pqi_sense_subsystem_info(ctrl_info, sense_info);
+	if (rc)
+		goto out;
+
+	memcpy(ctrl_info->serial_number, sense_info->ctrl_serial_number,
+		sizeof(sense_info->ctrl_serial_number));
+	ctrl_info->serial_number[sizeof(sense_info->ctrl_serial_number)] = '\0';
+
+out:
+	kfree(sense_info);
+
+	return rc;
+}
+
+static int pqi_get_ctrl_product_details(struct pqi_ctrl_info *ctrl_info)
+{
+	int rc;
+	struct bmic_identify_controller *identify;
+
+	identify = kmalloc(sizeof(*identify), GFP_KERNEL);
+	if (!identify)
+		return -ENOMEM;
+
+	rc = pqi_identify_controller(ctrl_info, identify);
+	if (rc)
+		goto out;
+
+	if (get_unaligned_le32(&identify->extra_controller_flags) &
+		BMIC_IDENTIFY_EXTRA_FLAGS_LONG_FW_VERSION_SUPPORTED) {
+		memcpy(ctrl_info->firmware_version,
+			identify->firmware_version_long,
+			sizeof(identify->firmware_version_long));
+	} else {
+		memcpy(ctrl_info->firmware_version,
+			identify->firmware_version_short,
+			sizeof(identify->firmware_version_short));
+		ctrl_info->firmware_version
+			[sizeof(identify->firmware_version_short)] = '\0';
+		snprintf(ctrl_info->firmware_version +
+			strlen(ctrl_info->firmware_version),
+			sizeof(ctrl_info->firmware_version) -
+			sizeof(identify->firmware_version_short),
+			"-%u",
+			get_unaligned_le16(&identify->firmware_build_number));
+	}
+
+	memcpy(ctrl_info->model, identify->product_id,
+		sizeof(identify->product_id));
+	ctrl_info->model[sizeof(identify->product_id)] = '\0';
+
+	memcpy(ctrl_info->vendor, identify->vendor_id,
+		sizeof(identify->vendor_id));
+	ctrl_info->vendor[sizeof(identify->vendor_id)] = '\0';
+
+	dev_info(&ctrl_info->pci_dev->dev,
+		"Firmware version: %s\n", ctrl_info->firmware_version);
+
+out:
+	kfree(identify);
+
+	return rc;
+}
+
+struct pqi_config_table_section_info {
+	struct pqi_ctrl_info *ctrl_info;
+	void		*section;
+	u32		section_offset;
+	void __iomem	*section_iomem_addr;
+};
+
+static inline bool pqi_is_firmware_feature_supported(
+	struct pqi_config_table_firmware_features *firmware_features,
+	unsigned int bit_position)
+{
+	unsigned int byte_index;
+
+	byte_index = bit_position / BITS_PER_BYTE;
+
+	if (byte_index >= le16_to_cpu(firmware_features->num_elements))
+		return false;
+
+	return firmware_features->features_supported[byte_index] &
+		(1 << (bit_position % BITS_PER_BYTE)) ? true : false;
+}
+
+static inline bool pqi_is_firmware_feature_enabled(
+	struct pqi_config_table_firmware_features *firmware_features,
+	void __iomem *firmware_features_iomem_addr,
+	unsigned int bit_position)
+{
+	unsigned int byte_index;
+	u8 __iomem *features_enabled_iomem_addr;
+
+	byte_index = (bit_position / BITS_PER_BYTE) +
+		(le16_to_cpu(firmware_features->num_elements) * 2);
+
+	features_enabled_iomem_addr = firmware_features_iomem_addr +
+		offsetof(struct pqi_config_table_firmware_features,
+			features_supported) + byte_index;
+
+	return *((__force u8 *)features_enabled_iomem_addr) &
+		(1 << (bit_position % BITS_PER_BYTE)) ? true : false;
+}
+
+static inline void pqi_request_firmware_feature(
+	struct pqi_config_table_firmware_features *firmware_features,
+	unsigned int bit_position)
+{
+	unsigned int byte_index;
+
+	byte_index = (bit_position / BITS_PER_BYTE) +
+		le16_to_cpu(firmware_features->num_elements);
+
+	firmware_features->features_supported[byte_index] |=
+		(1 << (bit_position % BITS_PER_BYTE));
+}
+
+static int pqi_config_table_update(struct pqi_ctrl_info *ctrl_info,
+	u16 first_section, u16 last_section)
+{
+	struct pqi_vendor_general_request request;
+
+	memset(&request, 0, sizeof(request));
+
+	request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
+	put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
+		&request.header.iu_length);
+	put_unaligned_le16(PQI_VENDOR_GENERAL_CONFIG_TABLE_UPDATE,
+		&request.function_code);
+	put_unaligned_le16(first_section,
+		&request.data.config_table_update.first_section);
+	put_unaligned_le16(last_section,
+		&request.data.config_table_update.last_section);
+
+	return pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
+}
+
+static int pqi_enable_firmware_features(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_config_table_firmware_features *firmware_features,
+	void __iomem *firmware_features_iomem_addr)
+{
+	void *features_requested;
+	void __iomem *features_requested_iomem_addr;
+	void __iomem *host_max_known_feature_iomem_addr;
+
+	features_requested = firmware_features->features_supported +
+		le16_to_cpu(firmware_features->num_elements);
+
+	features_requested_iomem_addr = firmware_features_iomem_addr +
+		(features_requested - (void *)firmware_features);
+
+	memcpy_toio(features_requested_iomem_addr, features_requested,
+		le16_to_cpu(firmware_features->num_elements));
+
+	if (pqi_is_firmware_feature_supported(firmware_features,
+		PQI_FIRMWARE_FEATURE_MAX_KNOWN_FEATURE)) {
+		host_max_known_feature_iomem_addr =
+			features_requested_iomem_addr +
+			(le16_to_cpu(firmware_features->num_elements) * 2) +
+			sizeof(__le16);
+		writew(PQI_FIRMWARE_FEATURE_MAXIMUM,
+			host_max_known_feature_iomem_addr);
+	}
+
+	return pqi_config_table_update(ctrl_info,
+		PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES,
+		PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES);
+}
+
+struct pqi_firmware_feature {
+	char		*feature_name;
+	unsigned int	feature_bit;
+	bool		supported;
+	bool		enabled;
+	void (*feature_status)(struct pqi_ctrl_info *ctrl_info,
+		struct pqi_firmware_feature *firmware_feature);
+};
+
+static void pqi_firmware_feature_status(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_firmware_feature *firmware_feature)
+{
+	if (!firmware_feature->supported) {
+		dev_info(&ctrl_info->pci_dev->dev, "%s not supported by controller\n",
+			firmware_feature->feature_name);
+		return;
+	}
+
+	if (firmware_feature->enabled) {
+		dev_info(&ctrl_info->pci_dev->dev,
+			"%s enabled\n", firmware_feature->feature_name);
+		return;
+	}
+
+	dev_err(&ctrl_info->pci_dev->dev, "failed to enable %s\n",
+		firmware_feature->feature_name);
+}
+
+static void pqi_ctrl_update_feature_flags(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_firmware_feature *firmware_feature)
+{
+	switch (firmware_feature->feature_bit) {
+	case PQI_FIRMWARE_FEATURE_RAID_1_WRITE_BYPASS:
+		ctrl_info->enable_r1_writes = firmware_feature->enabled;
+		break;
+	case PQI_FIRMWARE_FEATURE_RAID_5_WRITE_BYPASS:
+		ctrl_info->enable_r5_writes = firmware_feature->enabled;
+		break;
+	case PQI_FIRMWARE_FEATURE_RAID_6_WRITE_BYPASS:
+		ctrl_info->enable_r6_writes = firmware_feature->enabled;
+		break;
+	case PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE:
+		ctrl_info->soft_reset_handshake_supported =
+			firmware_feature->enabled &&
+			pqi_read_soft_reset_status(ctrl_info);
+		break;
+	case PQI_FIRMWARE_FEATURE_RAID_IU_TIMEOUT:
+		ctrl_info->raid_iu_timeout_supported = firmware_feature->enabled;
+		break;
+	case PQI_FIRMWARE_FEATURE_TMF_IU_TIMEOUT:
+		ctrl_info->tmf_iu_timeout_supported = firmware_feature->enabled;
+		break;
+	case PQI_FIRMWARE_FEATURE_FW_TRIAGE:
+		ctrl_info->firmware_triage_supported = firmware_feature->enabled;
+		pqi_save_fw_triage_setting(ctrl_info, firmware_feature->enabled);
+		break;
+	case PQI_FIRMWARE_FEATURE_RPL_EXTENDED_FORMAT_4_5:
+		ctrl_info->rpl_extended_format_4_5_supported = firmware_feature->enabled;
+		break;
+	case PQI_FIRMWARE_FEATURE_MULTI_LUN_DEVICE_SUPPORT:
+		ctrl_info->multi_lun_device_supported = firmware_feature->enabled;
+		break;
+	}
+
+	pqi_firmware_feature_status(ctrl_info, firmware_feature);
+}
+
+static inline void pqi_firmware_feature_update(struct pqi_ctrl_info *ctrl_info,
+	struct pqi_firmware_feature *firmware_feature)
+{
+	if (firmware_feature->feature_status)
+		firmware_feature->feature_status(ctrl_info, firmware_feature);
+}
+
+static DEFINE_MUTEX(pqi_firmware_features_mutex);
+
+static struct pqi_firmware_feature pqi_firmware_features[] = {
+	{
+		.feature_name = "Online Firmware Activation",
+		.feature_bit = PQI_FIRMWARE_FEATURE_OFA,
+		.feature_status = pqi_firmware_feature_status,
+	},
+	{
+		.feature_name = "Serial Management Protocol",
+		.feature_bit = PQI_FIRMWARE_FEATURE_SMP,
+		.feature_status = pqi_firmware_feature_status,
+	},
+	{
+		.feature_name = "Maximum Known Feature",
+		.feature_bit = PQI_FIRMWARE_FEATURE_MAX_KNOWN_FEATURE,
+		.feature_status = pqi_firmware_feature_status,
+	},
+	{
+		.feature_name = "RAID 0 Read Bypass",
+		.feature_bit = PQI_FIRMWARE_FEATURE_RAID_0_READ_BYPASS,
+		.feature_status = pqi_firmware_feature_status,
+	},
+	{
+		.feature_name = "RAID 1 Read Bypass",
+		.feature_bit = PQI_FIRMWARE_FEATURE_RAID_1_READ_BYPASS,
+		.feature_status = pqi_firmware_feature_status,
+	},
+	{
+		.feature_name = "RAID 5 Read Bypass",
+		.feature_bit = PQI_FIRMWARE_FEATURE_RAID_5_READ_BYPASS,
+		.feature_status = pqi_firmware_feature_status,
+	},
+	{
+		.feature_name = "RAID 6 Read Bypass",
+		.feature_bit = PQI_FIRMWARE_FEATURE_RAID_6_READ_BYPASS,
+		.feature_status = pqi_firmware_feature_status,
+	},
+	{
+		.feature_name = "RAID 0 Write Bypass",
+		.feature_bit = PQI_FIRMWARE_FEATURE_RAID_0_WRITE_BYPASS,
+		.feature_status = pqi_firmware_feature_status,
+	},
+	{
+		.feature_name = "RAID 1 Write Bypass",
+		.feature_bit = PQI_FIRMWARE_FEATURE_RAID_1_WRITE_BYPASS,
+		.feature_status = pqi_ctrl_update_feature_flags,
+	},
+	{
+		.feature_name = "RAID 5 Write Bypass",
+		.feature_bit = PQI_FIRMWARE_FEATURE_RAID_5_WRITE_BYPASS,
+		.feature_status = pqi_ctrl_update_feature_flags,
+	},
+	{
+		.feature_name = "RAID 6 Write Bypass",
+		.feature_bit = PQI_FIRMWARE_FEATURE_RAID_6_WRITE_BYPASS,
+		.feature_status = pqi_ctrl_update_feature_flags,
+	},
+	{
+		.feature_name = "New Soft Reset Handshake",
+		.feature_bit = PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE,
+		.feature_status = pqi_ctrl_update_feature_flags,
+	},
+	{
+		.feature_name = "RAID IU Timeout",
+		.feature_bit = PQI_FIRMWARE_FEATURE_RAID_IU_TIMEOUT,
+		.feature_status = pqi_ctrl_update_feature_flags,
+	},
+	{
+		.feature_name = "TMF IU Timeout",
+		.feature_bit = PQI_FIRMWARE_FEATURE_TMF_IU_TIMEOUT,
+		.feature_status = pqi_ctrl_update_feature_flags,
+	},
+	{
+		.feature_name = "RAID Bypass on encrypted logical volumes on NVMe",
+		.feature_bit = PQI_FIRMWARE_FEATURE_RAID_BYPASS_ON_ENCRYPTED_NVME,
+		.feature_status = pqi_firmware_feature_status,
+	},
+	{
+		.feature_name = "Firmware Triage",
+		.feature_bit = PQI_FIRMWARE_FEATURE_FW_TRIAGE,
+		.feature_status = pqi_ctrl_update_feature_flags,
+	},
+	{
+		.feature_name = "RPL Extended Formats 4 and 5",
+		.feature_bit = PQI_FIRMWARE_FEATURE_RPL_EXTENDED_FORMAT_4_5,
+		.feature_status = pqi_ctrl_update_feature_flags,
+	},
+	{
+		.feature_name = "Multi-LUN Target",
+		.feature_bit = PQI_FIRMWARE_FEATURE_MULTI_LUN_DEVICE_SUPPORT,
+		.feature_status = pqi_ctrl_update_feature_flags,
+	},
+};
+
+static void pqi_process_firmware_features(
+	struct pqi_config_table_section_info *section_info)
+{
+	int rc;
+	struct pqi_ctrl_info *ctrl_info;
+	struct pqi_config_table_firmware_features *firmware_features;
+	void __iomem *firmware_features_iomem_addr;
+	unsigned int i;
+	unsigned int num_features_supported;
+
+	ctrl_info = section_info->ctrl_info;
+	firmware_features = section_info->section;
+	firmware_features_iomem_addr = section_info->section_iomem_addr;
+
+	for (i = 0, num_features_supported = 0;
+		i < ARRAY_SIZE(pqi_firmware_features); i++) {
+		if (pqi_is_firmware_feature_supported(firmware_features,
+			pqi_firmware_features[i].feature_bit)) {
+			pqi_firmware_features[i].supported = true;
+			num_features_supported++;
+		} else {
+			pqi_firmware_feature_update(ctrl_info,
+				&pqi_firmware_features[i]);
+		}
+	}
+
+	if (num_features_supported == 0)
+		return;
+
+	for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
+		if (!pqi_firmware_features[i].supported)
+			continue;
+		pqi_request_firmware_feature(firmware_features,
+			pqi_firmware_features[i].feature_bit);
+	}
+
+	rc = pqi_enable_firmware_features(ctrl_info, firmware_features,
+		firmware_features_iomem_addr);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"failed to enable firmware features in PQI configuration table\n");
+		for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
+			if (!pqi_firmware_features[i].supported)
+				continue;
+			pqi_firmware_feature_update(ctrl_info,
+				&pqi_firmware_features[i]);
+		}
+		return;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
+		if (!pqi_firmware_features[i].supported)
+			continue;
+		if (pqi_is_firmware_feature_enabled(firmware_features,
+			firmware_features_iomem_addr,
+			pqi_firmware_features[i].feature_bit)) {
+				pqi_firmware_features[i].enabled = true;
+		}
+		pqi_firmware_feature_update(ctrl_info,
+			&pqi_firmware_features[i]);
+	}
+}
+
+static void pqi_init_firmware_features(void)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
+		pqi_firmware_features[i].supported = false;
+		pqi_firmware_features[i].enabled = false;
+	}
+}
+
+static void pqi_process_firmware_features_section(
+	struct pqi_config_table_section_info *section_info)
+{
+	mutex_lock(&pqi_firmware_features_mutex);
+	pqi_init_firmware_features();
+	pqi_process_firmware_features(section_info);
+	mutex_unlock(&pqi_firmware_features_mutex);
+}
+
+/*
+ * Reset all controller settings that can be initialized during the processing
+ * of the PQI Configuration Table.
+ */
+
+static void pqi_ctrl_reset_config(struct pqi_ctrl_info *ctrl_info)
+{
+	ctrl_info->heartbeat_counter = NULL;
+	ctrl_info->soft_reset_status = NULL;
+	ctrl_info->soft_reset_handshake_supported = false;
+	ctrl_info->enable_r1_writes = false;
+	ctrl_info->enable_r5_writes = false;
+	ctrl_info->enable_r6_writes = false;
+	ctrl_info->raid_iu_timeout_supported = false;
+	ctrl_info->tmf_iu_timeout_supported = false;
+	ctrl_info->firmware_triage_supported = false;
+	ctrl_info->rpl_extended_format_4_5_supported = false;
+	ctrl_info->multi_lun_device_supported = false;
+}
+
+static int pqi_process_config_table(struct pqi_ctrl_info *ctrl_info)
+{
+	u32 table_length;
+	u32 section_offset;
+	bool firmware_feature_section_present;
+	void __iomem *table_iomem_addr;
+	struct pqi_config_table *config_table;
+	struct pqi_config_table_section_header *section;
+	struct pqi_config_table_section_info section_info;
+	struct pqi_config_table_section_info feature_section_info;
+
+	table_length = ctrl_info->config_table_length;
+	if (table_length == 0)
+		return 0;
+
+	config_table = kmalloc(table_length, GFP_KERNEL);
+	if (!config_table) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"failed to allocate memory for PQI configuration table\n");
+		return -ENOMEM;
+	}
+
+	/*
+	 * Copy the config table contents from I/O memory space into the
+	 * temporary buffer.
+	 */
+	table_iomem_addr = ctrl_info->iomem_base + ctrl_info->config_table_offset;
+	memcpy_fromio(config_table, table_iomem_addr, table_length);
+
+	firmware_feature_section_present = false;
+	section_info.ctrl_info = ctrl_info;
+	section_offset = get_unaligned_le32(&config_table->first_section_offset);
+
+	while (section_offset) {
+		section = (void *)config_table + section_offset;
+
+		section_info.section = section;
+		section_info.section_offset = section_offset;
+		section_info.section_iomem_addr = table_iomem_addr + section_offset;
+
+		switch (get_unaligned_le16(&section->section_id)) {
+		case PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES:
+			firmware_feature_section_present = true;
+			feature_section_info = section_info;
+			break;
+		case PQI_CONFIG_TABLE_SECTION_HEARTBEAT:
+			if (pqi_disable_heartbeat)
+				dev_warn(&ctrl_info->pci_dev->dev,
+				"heartbeat disabled by module parameter\n");
+			else
+				ctrl_info->heartbeat_counter =
+					table_iomem_addr +
+					section_offset +
+					offsetof(struct pqi_config_table_heartbeat,
+						heartbeat_counter);
+			break;
+		case PQI_CONFIG_TABLE_SECTION_SOFT_RESET:
+			ctrl_info->soft_reset_status =
+				table_iomem_addr +
+				section_offset +
+				offsetof(struct pqi_config_table_soft_reset,
+					soft_reset_status);
+			break;
+		}
+
+		section_offset = get_unaligned_le16(&section->next_section_offset);
+	}
+
+	/*
+	 * We process the firmware feature section after all other sections
+	 * have been processed so that the feature bit callbacks can take
+	 * into account the settings configured by other sections.
+	 */
+	if (firmware_feature_section_present)
+		pqi_process_firmware_features_section(&feature_section_info);
+
+	kfree(config_table);
+
+	return 0;
+}
+
+/* Switches the controller from PQI mode back into SIS mode. */
+
+static int pqi_revert_to_sis_mode(struct pqi_ctrl_info *ctrl_info)
+{
+	int rc;
+
+	pqi_change_irq_mode(ctrl_info, IRQ_MODE_NONE);
+	rc = pqi_reset(ctrl_info);
+	if (rc)
+		return rc;
+	rc = sis_reenable_sis_mode(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"re-enabling SIS mode failed with error %d\n", rc);
+		return rc;
+	}
+	pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
+
+	return 0;
+}
+
+/*
+ * If the controller isn't already in SIS mode, this function forces it into
+ * SIS mode.
+ */
+
+static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info)
+{
+	if (!sis_is_firmware_running(ctrl_info))
+		return -ENXIO;
+
+	if (pqi_get_ctrl_mode(ctrl_info) == SIS_MODE)
+		return 0;
+
+	if (sis_is_kernel_up(ctrl_info)) {
+		pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
+		return 0;
+	}
+
+	return pqi_revert_to_sis_mode(ctrl_info);
+}
+
+static void pqi_perform_lockup_action(void)
+{
+	switch (pqi_lockup_action) {
+	case PANIC:
+		panic("FATAL: Smart Family Controller lockup detected");
+		break;
+	case REBOOT:
+		emergency_restart();
+		break;
+	case NONE:
+	default:
+		break;
+	}
+}
+
+static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
+{
+	int rc;
+	u32 product_id;
+
+	if (reset_devices) {
+		if (pqi_is_fw_triage_supported(ctrl_info)) {
+			rc = sis_wait_for_fw_triage_completion(ctrl_info);
+			if (rc)
+				return rc;
+		}
+		sis_soft_reset(ctrl_info);
+		ssleep(PQI_POST_RESET_DELAY_SECS);
+	} else {
+		rc = pqi_force_sis_mode(ctrl_info);
+		if (rc)
+			return rc;
+	}
+
+	/*
+	 * Wait until the controller is ready to start accepting SIS
+	 * commands.
+	 */
+	rc = sis_wait_for_ctrl_ready(ctrl_info);
+	if (rc) {
+		if (reset_devices) {
+			dev_err(&ctrl_info->pci_dev->dev,
+				"kdump init failed with error %d\n", rc);
+			pqi_lockup_action = REBOOT;
+			pqi_perform_lockup_action();
+		}
+		return rc;
+	}
+
+	/*
+	 * Get the controller properties.  This allows us to determine
+	 * whether or not it supports PQI mode.
+	 */
+	rc = sis_get_ctrl_properties(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error obtaining controller properties\n");
+		return rc;
+	}
+
+	rc = sis_get_pqi_capabilities(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error obtaining controller capabilities\n");
+		return rc;
+	}
+
+	product_id = sis_get_product_id(ctrl_info);
+	ctrl_info->product_id = (u8)product_id;
+	ctrl_info->product_revision = (u8)(product_id >> 8);
+
+	if (reset_devices) {
+		if (ctrl_info->max_outstanding_requests >
+			PQI_MAX_OUTSTANDING_REQUESTS_KDUMP)
+				ctrl_info->max_outstanding_requests =
+					PQI_MAX_OUTSTANDING_REQUESTS_KDUMP;
+	} else {
+		if (ctrl_info->max_outstanding_requests >
+			PQI_MAX_OUTSTANDING_REQUESTS)
+				ctrl_info->max_outstanding_requests =
+					PQI_MAX_OUTSTANDING_REQUESTS;
+	}
+
+	pqi_calculate_io_resources(ctrl_info);
+
+	rc = pqi_alloc_error_buffer(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"failed to allocate PQI error buffer\n");
+		return rc;
+	}
+
+	/*
+	 * If the function we are about to call succeeds, the
+	 * controller will transition from legacy SIS mode
+	 * into PQI mode.
+	 */
+	rc = sis_init_base_struct_addr(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error initializing PQI mode\n");
+		return rc;
+	}
+
+	/* Wait for the controller to complete the SIS -> PQI transition. */
+	rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"transition to PQI mode failed\n");
+		return rc;
+	}
+
+	/* From here on, we are running in PQI mode. */
+	ctrl_info->pqi_mode_enabled = true;
+	pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
+
+	rc = pqi_alloc_admin_queues(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"failed to allocate admin queues\n");
+		return rc;
+	}
+
+	rc = pqi_create_admin_queues(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error creating admin queues\n");
+		return rc;
+	}
+
+	rc = pqi_report_device_capability(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"obtaining device capability failed\n");
+		return rc;
+	}
+
+	rc = pqi_validate_device_capability(ctrl_info);
+	if (rc)
+		return rc;
+
+	pqi_calculate_queue_resources(ctrl_info);
+
+	rc = pqi_enable_msix_interrupts(ctrl_info);
+	if (rc)
+		return rc;
+
+	if (ctrl_info->num_msix_vectors_enabled < ctrl_info->num_queue_groups) {
+		ctrl_info->max_msix_vectors =
+			ctrl_info->num_msix_vectors_enabled;
+		pqi_calculate_queue_resources(ctrl_info);
+	}
+
+	rc = pqi_alloc_io_resources(ctrl_info);
+	if (rc)
+		return rc;
+
+	rc = pqi_alloc_operational_queues(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"failed to allocate operational queues\n");
+		return rc;
+	}
+
+	pqi_init_operational_queues(ctrl_info);
+
+	rc = pqi_create_queues(ctrl_info);
+	if (rc)
+		return rc;
+
+	rc = pqi_request_irqs(ctrl_info);
+	if (rc)
+		return rc;
+
+	pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
+
+	ctrl_info->controller_online = true;
+
+	rc = pqi_process_config_table(ctrl_info);
+	if (rc)
+		return rc;
+
+	pqi_start_heartbeat_timer(ctrl_info);
+
+	if (ctrl_info->enable_r5_writes || ctrl_info->enable_r6_writes) {
+		rc = pqi_get_advanced_raid_bypass_config(ctrl_info);
+		if (rc) { /* Supported features not returned correctly. */
+			dev_err(&ctrl_info->pci_dev->dev,
+				"error obtaining advanced RAID bypass configuration\n");
+			return rc;
+		}
+		ctrl_info->ciss_report_log_flags |=
+			CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX;
+	}
+
+	rc = pqi_enable_events(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error enabling events\n");
+		return rc;
+	}
+
+	/* Register with the SCSI subsystem. */
+	rc = pqi_register_scsi(ctrl_info);
+	if (rc)
+		return rc;
+
+	rc = pqi_get_ctrl_product_details(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error obtaining product details\n");
+		return rc;
+	}
+
+	rc = pqi_get_ctrl_serial_number(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error obtaining ctrl serial number\n");
+		return rc;
+	}
+
+	rc = pqi_set_diag_rescan(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error enabling multi-lun rescan\n");
+		return rc;
+	}
+
+	rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error updating host wellness\n");
+		return rc;
+	}
+
+	pqi_schedule_update_time_worker(ctrl_info);
+
+	pqi_scan_scsi_devices(ctrl_info);
+
+	return 0;
+}
+
+static void pqi_reinit_queues(struct pqi_ctrl_info *ctrl_info)
+{
+	unsigned int i;
+	struct pqi_admin_queues *admin_queues;
+	struct pqi_event_queue *event_queue;
+
+	admin_queues = &ctrl_info->admin_queues;
+	admin_queues->iq_pi_copy = 0;
+	admin_queues->oq_ci_copy = 0;
+	writel(0, admin_queues->oq_pi);
+
+	for (i = 0; i < ctrl_info->num_queue_groups; i++) {
+		ctrl_info->queue_groups[i].iq_pi_copy[RAID_PATH] = 0;
+		ctrl_info->queue_groups[i].iq_pi_copy[AIO_PATH] = 0;
+		ctrl_info->queue_groups[i].oq_ci_copy = 0;
+
+		writel(0, ctrl_info->queue_groups[i].iq_ci[RAID_PATH]);
+		writel(0, ctrl_info->queue_groups[i].iq_ci[AIO_PATH]);
+		writel(0, ctrl_info->queue_groups[i].oq_pi);
+	}
+
+	event_queue = &ctrl_info->event_queue;
+	writel(0, event_queue->oq_pi);
+	event_queue->oq_ci_copy = 0;
+}
+
+static int pqi_ctrl_init_resume(struct pqi_ctrl_info *ctrl_info)
+{
+	int rc;
+
+	rc = pqi_force_sis_mode(ctrl_info);
+	if (rc)
+		return rc;
+
+	/*
+	 * Wait until the controller is ready to start accepting SIS
+	 * commands.
+	 */
+	rc = sis_wait_for_ctrl_ready_resume(ctrl_info);
+	if (rc)
+		return rc;
+
+	/*
+	 * Get the controller properties.  This allows us to determine
+	 * whether or not it supports PQI mode.
+	 */
+	rc = sis_get_ctrl_properties(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error obtaining controller properties\n");
+		return rc;
+	}
+
+	rc = sis_get_pqi_capabilities(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error obtaining controller capabilities\n");
+		return rc;
+	}
+
+	/*
+	 * If the function we are about to call succeeds, the
+	 * controller will transition from legacy SIS mode
+	 * into PQI mode.
+	 */
+	rc = sis_init_base_struct_addr(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error initializing PQI mode\n");
+		return rc;
+	}
+
+	/* Wait for the controller to complete the SIS -> PQI transition. */
+	rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"transition to PQI mode failed\n");
+		return rc;
+	}
+
+	/* From here on, we are running in PQI mode. */
+	ctrl_info->pqi_mode_enabled = true;
+	pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
+
+	pqi_reinit_queues(ctrl_info);
+
+	rc = pqi_create_admin_queues(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error creating admin queues\n");
+		return rc;
+	}
+
+	rc = pqi_create_queues(ctrl_info);
+	if (rc)
+		return rc;
+
+	pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
+
+	ctrl_info->controller_online = true;
+	pqi_ctrl_unblock_requests(ctrl_info);
+
+	pqi_ctrl_reset_config(ctrl_info);
+
+	rc = pqi_process_config_table(ctrl_info);
+	if (rc)
+		return rc;
+
+	pqi_start_heartbeat_timer(ctrl_info);
+
+	if (ctrl_info->enable_r5_writes || ctrl_info->enable_r6_writes) {
+		rc = pqi_get_advanced_raid_bypass_config(ctrl_info);
+		if (rc) {
+			dev_err(&ctrl_info->pci_dev->dev,
+				"error obtaining advanced RAID bypass configuration\n");
+			return rc;
+		}
+		ctrl_info->ciss_report_log_flags |=
+			CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX;
+	}
+
+	rc = pqi_enable_events(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error enabling events\n");
+		return rc;
+	}
+
+	rc = pqi_get_ctrl_product_details(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error obtaining product details\n");
+		return rc;
+	}
+
+	rc = pqi_set_diag_rescan(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error enabling multi-lun rescan\n");
+		return rc;
+	}
+
+	rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"error updating host wellness\n");
+		return rc;
+	}
+
+	if (pqi_ofa_in_progress(ctrl_info))
+		pqi_ctrl_unblock_scan(ctrl_info);
+
+	pqi_scan_scsi_devices(ctrl_info);
+
+	return 0;
+}
+
+static inline int pqi_set_pcie_completion_timeout(struct pci_dev *pci_dev, u16 timeout)
+{
+	int rc;
+
+	rc = pcie_capability_clear_and_set_word(pci_dev, PCI_EXP_DEVCTL2,
+		PCI_EXP_DEVCTL2_COMP_TIMEOUT, timeout);
+
+	return pcibios_err_to_errno(rc);
+}
+
+static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info)
+{
+	int rc;
+	u64 mask;
+
+	rc = pci_enable_device(ctrl_info->pci_dev);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"failed to enable PCI device\n");
+		return rc;
+	}
+
+	if (sizeof(dma_addr_t) > 4)
+		mask = DMA_BIT_MASK(64);
+	else
+		mask = DMA_BIT_MASK(32);
+
+	rc = dma_set_mask_and_coherent(&ctrl_info->pci_dev->dev, mask);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n");
+		goto disable_device;
+	}
+
+	rc = pci_request_regions(ctrl_info->pci_dev, DRIVER_NAME_SHORT);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"failed to obtain PCI resources\n");
+		goto disable_device;
+	}
+
+	ctrl_info->iomem_base = ioremap(pci_resource_start(
+		ctrl_info->pci_dev, 0),
+		sizeof(struct pqi_ctrl_registers));
+	if (!ctrl_info->iomem_base) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"failed to map memory for controller registers\n");
+		rc = -ENOMEM;
+		goto release_regions;
+	}
+
+#define PCI_EXP_COMP_TIMEOUT_65_TO_210_MS		0x6
+
+	/* Increase the PCIe completion timeout. */
+	rc = pqi_set_pcie_completion_timeout(ctrl_info->pci_dev,
+		PCI_EXP_COMP_TIMEOUT_65_TO_210_MS);
+	if (rc) {
+		dev_err(&ctrl_info->pci_dev->dev,
+			"failed to set PCIe completion timeout\n");
+		goto release_regions;
+	}
+
+	/* Enable bus mastering. */
+	pci_set_master(ctrl_info->pci_dev);
+
+	ctrl_info->registers = ctrl_info->iomem_base;
+	ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers;
+
+	pci_set_drvdata(ctrl_info->pci_dev, ctrl_info);
+
+	return 0;
+
+release_regions:
+	pci_release_regions(ctrl_info->pci_dev);
+disable_device:
+	pci_disable_device(ctrl_info->pci_dev);
+
+	return rc;
+}
+
+static void pqi_cleanup_pci_init(struct pqi_ctrl_info *ctrl_info)
+{
+	iounmap(ctrl_info->iomem_base);
+	pci_release_regions(ctrl_info->pci_dev);
+	if (pci_is_enabled(ctrl_info->pci_dev))
+		pci_disable_device(ctrl_info->pci_dev);
+	pci_set_drvdata(ctrl_info->pci_dev, NULL);
+}
+
+static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node)
+{
+	struct pqi_ctrl_info *ctrl_info;
+
+	ctrl_info = kzalloc_node(sizeof(struct pqi_ctrl_info),
+			GFP_KERNEL, numa_node);
+	if (!ctrl_info)
+		return NULL;
+
+	mutex_init(&ctrl_info->scan_mutex);
+	mutex_init(&ctrl_info->lun_reset_mutex);
+	mutex_init(&ctrl_info->ofa_mutex);
+
+	INIT_LIST_HEAD(&ctrl_info->scsi_device_list);
+	spin_lock_init(&ctrl_info->scsi_device_list_lock);
+
+	INIT_WORK(&ctrl_info->event_work, pqi_event_worker);
+	atomic_set(&ctrl_info->num_interrupts, 0);
+
+	INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
+	INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
+
+	timer_setup(&ctrl_info->heartbeat_timer, pqi_heartbeat_timer_handler, 0);
+	INIT_WORK(&ctrl_info->ctrl_offline_work, pqi_ctrl_offline_worker);
+
+	INIT_WORK(&ctrl_info->ofa_memory_alloc_work, pqi_ofa_memory_alloc_worker);
+	INIT_WORK(&ctrl_info->ofa_quiesce_work, pqi_ofa_quiesce_worker);
+
+	sema_init(&ctrl_info->sync_request_sem,
+		PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
+	init_waitqueue_head(&ctrl_info->block_requests_wait);
+
+	ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1;
+	ctrl_info->irq_mode = IRQ_MODE_NONE;
+	ctrl_info->max_msix_vectors = PQI_MAX_MSIX_VECTORS;
+
+	ctrl_info->ciss_report_log_flags = CISS_REPORT_LOG_FLAG_UNIQUE_LUN_ID;
+	ctrl_info->max_transfer_encrypted_sas_sata =
+		PQI_DEFAULT_MAX_TRANSFER_ENCRYPTED_SAS_SATA;
+	ctrl_info->max_transfer_encrypted_nvme =
+		PQI_DEFAULT_MAX_TRANSFER_ENCRYPTED_NVME;
+	ctrl_info->max_write_raid_5_6 = PQI_DEFAULT_MAX_WRITE_RAID_5_6;
+	ctrl_info->max_write_raid_1_10_2drive = ~0;
+	ctrl_info->max_write_raid_1_10_3drive = ~0;
+	ctrl_info->disable_managed_interrupts = pqi_disable_managed_interrupts;
+
+	return ctrl_info;
+}
+
+static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info)
+{
+	kfree(ctrl_info);
+}
+
+static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
+{
+	pqi_free_irqs(ctrl_info);
+	pqi_disable_msix_interrupts(ctrl_info);
+}
+
+static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)
+{
+	pqi_free_interrupts(ctrl_info);
+	if (ctrl_info->queue_memory_base)
+		dma_free_coherent(&ctrl_info->pci_dev->dev,
+			ctrl_info->queue_memory_length,
+			ctrl_info->queue_memory_base,
+			ctrl_info->queue_memory_base_dma_handle);
+	if (ctrl_info->admin_queue_memory_base)
+		dma_free_coherent(&ctrl_info->pci_dev->dev,
+			ctrl_info->admin_queue_memory_length,
+			ctrl_info->admin_queue_memory_base,
+			ctrl_info->admin_queue_memory_base_dma_handle);
+	pqi_free_all_io_requests(ctrl_info);
+	if (ctrl_info->error_buffer)
+		dma_free_coherent(&ctrl_info->pci_dev->dev,
+			ctrl_info->error_buffer_length,
+			ctrl_info->error_buffer,
+			ctrl_info->error_buffer_dma_handle);
+	if (ctrl_info->iomem_base)
+		pqi_cleanup_pci_init(ctrl_info);
+	pqi_free_ctrl_info(ctrl_info);
+}
+
+static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info)
+{
+	ctrl_info->controller_online = false;
+	pqi_stop_heartbeat_timer(ctrl_info);
+	pqi_ctrl_block_requests(ctrl_info);
+	pqi_cancel_rescan_worker(ctrl_info);
+	pqi_cancel_update_time_worker(ctrl_info);
+	if (ctrl_info->ctrl_removal_state == PQI_CTRL_SURPRISE_REMOVAL) {
+		pqi_fail_all_outstanding_requests(ctrl_info);
+		ctrl_info->pqi_mode_enabled = false;
+	}
+	pqi_unregister_scsi(ctrl_info);
+	if (ctrl_info->pqi_mode_enabled)
+		pqi_revert_to_sis_mode(ctrl_info);
+	pqi_free_ctrl_resources(ctrl_info);
+}
+
+static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info)
+{
+	pqi_ctrl_block_scan(ctrl_info);
+	pqi_scsi_block_requests(ctrl_info);
+	pqi_ctrl_block_device_reset(ctrl_info);
+	pqi_ctrl_block_requests(ctrl_info);
+	pqi_ctrl_wait_until_quiesced(ctrl_info);
+	pqi_stop_heartbeat_timer(ctrl_info);
+}
+
+static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info)
+{
+	pqi_start_heartbeat_timer(ctrl_info);
+	pqi_ctrl_unblock_requests(ctrl_info);
+	pqi_ctrl_unblock_device_reset(ctrl_info);
+	pqi_scsi_unblock_requests(ctrl_info);
+	pqi_ctrl_unblock_scan(ctrl_info);
+}
+
+static int pqi_ofa_alloc_mem(struct pqi_ctrl_info *ctrl_info, u32 total_size, u32 chunk_size)
+{
+	int i;
+	u32 sg_count;
+	struct device *dev;
+	struct pqi_ofa_memory *ofap;
+	struct pqi_sg_descriptor *mem_descriptor;
+	dma_addr_t dma_handle;
+
+	ofap = ctrl_info->pqi_ofa_mem_virt_addr;
+
+	sg_count = DIV_ROUND_UP(total_size, chunk_size);
+	if (sg_count == 0 || sg_count > PQI_OFA_MAX_SG_DESCRIPTORS)
+		goto out;
+
+	ctrl_info->pqi_ofa_chunk_virt_addr = kmalloc_array(sg_count, sizeof(void *), GFP_KERNEL);
+	if (!ctrl_info->pqi_ofa_chunk_virt_addr)
+		goto out;
+
+	dev = &ctrl_info->pci_dev->dev;
+
+	for (i = 0; i < sg_count; i++) {
+		ctrl_info->pqi_ofa_chunk_virt_addr[i] =
+			dma_alloc_coherent(dev, chunk_size, &dma_handle, GFP_KERNEL);
+		if (!ctrl_info->pqi_ofa_chunk_virt_addr[i])
+			goto out_free_chunks;
+		mem_descriptor = &ofap->sg_descriptor[i];
+		put_unaligned_le64((u64)dma_handle, &mem_descriptor->address);
+		put_unaligned_le32(chunk_size, &mem_descriptor->length);
+	}
+
+	put_unaligned_le32(CISS_SG_LAST, &mem_descriptor->flags);
+	put_unaligned_le16(sg_count, &ofap->num_memory_descriptors);
+	put_unaligned_le32(sg_count * chunk_size, &ofap->bytes_allocated);
+
+	return 0;
+
+out_free_chunks:
+	while (--i >= 0) {
+		mem_descriptor = &ofap->sg_descriptor[i];
+		dma_free_coherent(dev, chunk_size,
+			ctrl_info->pqi_ofa_chunk_virt_addr[i],
+			get_unaligned_le64(&mem_descriptor->address));
+	}
+	kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
+
+out:
+	return -ENOMEM;
+}
+
+static int pqi_ofa_alloc_host_buffer(struct pqi_ctrl_info *ctrl_info)
+{
+	u32 total_size;
+	u32 chunk_size;
+	u32 min_chunk_size;
+
+	if (ctrl_info->ofa_bytes_requested == 0)
+		return 0;
+
+	total_size = PAGE_ALIGN(ctrl_info->ofa_bytes_requested);
+	min_chunk_size = DIV_ROUND_UP(total_size, PQI_OFA_MAX_SG_DESCRIPTORS);
+	min_chunk_size = PAGE_ALIGN(min_chunk_size);
+
+	for (chunk_size = total_size; chunk_size >= min_chunk_size;) {
+		if (pqi_ofa_alloc_mem(ctrl_info, total_size, chunk_size) == 0)
+			return 0;
+		chunk_size /= 2;
+		chunk_size = PAGE_ALIGN(chunk_size);
+	}
+
+	return -ENOMEM;
+}
+
+static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info)
+{
+	struct device *dev;
+	struct pqi_ofa_memory *ofap;
+
+	dev = &ctrl_info->pci_dev->dev;
+
+	ofap = dma_alloc_coherent(dev, sizeof(*ofap),
+		&ctrl_info->pqi_ofa_mem_dma_handle, GFP_KERNEL);
+	if (!ofap)
+		return;
+
+	ctrl_info->pqi_ofa_mem_virt_addr = ofap;
+
+	if (pqi_ofa_alloc_host_buffer(ctrl_info) < 0) {
+		dev_err(dev,
+			"failed to allocate host buffer for Online Firmware Activation\n");
+		dma_free_coherent(dev, sizeof(*ofap), ofap, ctrl_info->pqi_ofa_mem_dma_handle);
+		ctrl_info->pqi_ofa_mem_virt_addr = NULL;
+		return;
+	}
+
+	put_unaligned_le16(PQI_OFA_VERSION, &ofap->version);
+	memcpy(&ofap->signature, PQI_OFA_SIGNATURE, sizeof(ofap->signature));
+}
+
+static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info)
+{
+	unsigned int i;
+	struct device *dev;
+	struct pqi_ofa_memory *ofap;
+	struct pqi_sg_descriptor *mem_descriptor;
+	unsigned int num_memory_descriptors;
+
+	ofap = ctrl_info->pqi_ofa_mem_virt_addr;
+	if (!ofap)
+		return;
+
+	dev = &ctrl_info->pci_dev->dev;
+
+	if (get_unaligned_le32(&ofap->bytes_allocated) == 0)
+		goto out;
+
+	mem_descriptor = ofap->sg_descriptor;
+	num_memory_descriptors =
+		get_unaligned_le16(&ofap->num_memory_descriptors);
+
+	for (i = 0; i < num_memory_descriptors; i++) {
+		dma_free_coherent(dev,
+			get_unaligned_le32(&mem_descriptor[i].length),
+			ctrl_info->pqi_ofa_chunk_virt_addr[i],
+			get_unaligned_le64(&mem_descriptor[i].address));
+	}
+	kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
+
+out:
+	dma_free_coherent(dev, sizeof(*ofap), ofap,
+		ctrl_info->pqi_ofa_mem_dma_handle);
+	ctrl_info->pqi_ofa_mem_virt_addr = NULL;
+}
+
+static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info)
+{
+	u32 buffer_length;
+	struct pqi_vendor_general_request request;
+	struct pqi_ofa_memory *ofap;
+
+	memset(&request, 0, sizeof(request));
+
+	request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
+	put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
+		&request.header.iu_length);
+	put_unaligned_le16(PQI_VENDOR_GENERAL_HOST_MEMORY_UPDATE,
+		&request.function_code);
+
+	ofap = ctrl_info->pqi_ofa_mem_virt_addr;
+
+	if (ofap) {
+		buffer_length = offsetof(struct pqi_ofa_memory, sg_descriptor) +
+			get_unaligned_le16(&ofap->num_memory_descriptors) *
+			sizeof(struct pqi_sg_descriptor);
+
+		put_unaligned_le64((u64)ctrl_info->pqi_ofa_mem_dma_handle,
+			&request.data.ofa_memory_allocation.buffer_address);
+		put_unaligned_le32(buffer_length,
+			&request.data.ofa_memory_allocation.buffer_length);
+	}
+
+	return pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, NULL);
+}
+
+static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info, unsigned int delay_secs)
+{
+	ssleep(delay_secs);
+
+	return pqi_ctrl_init_resume(ctrl_info);
+}
+
+static struct pqi_raid_error_info pqi_ctrl_offline_raid_error_info = {
+	.data_out_result = PQI_DATA_IN_OUT_HARDWARE_ERROR,
+	.status = SAM_STAT_CHECK_CONDITION,
+};
+
+static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info)
+{
+	unsigned int i;
+	struct pqi_io_request *io_request;
+	struct scsi_cmnd *scmd;
+	struct scsi_device *sdev;
+
+	for (i = 0; i < ctrl_info->max_io_slots; i++) {
+		io_request = &ctrl_info->io_request_pool[i];
+		if (atomic_read(&io_request->refcount) == 0)
+			continue;
+
+		scmd = io_request->scmd;
+		if (scmd) {
+			sdev = scmd->device;
+			if (!sdev || !scsi_device_online(sdev)) {
+				pqi_free_io_request(io_request);
+				continue;
+			} else {
+				set_host_byte(scmd, DID_NO_CONNECT);
+			}
+		} else {
+			io_request->status = -ENXIO;
+			io_request->error_info =
+				&pqi_ctrl_offline_raid_error_info;
+		}
+
+		io_request->io_complete_callback(io_request,
+			io_request->context);
+	}
+}
+
+static void pqi_take_ctrl_offline_deferred(struct pqi_ctrl_info *ctrl_info)
+{
+	pqi_perform_lockup_action();
+	pqi_stop_heartbeat_timer(ctrl_info);
+	pqi_free_interrupts(ctrl_info);
+	pqi_cancel_rescan_worker(ctrl_info);
+	pqi_cancel_update_time_worker(ctrl_info);
+	pqi_ctrl_wait_until_quiesced(ctrl_info);
+	pqi_fail_all_outstanding_requests(ctrl_info);
+	pqi_ctrl_unblock_requests(ctrl_info);
+}
+
+static void pqi_ctrl_offline_worker(struct work_struct *work)
+{
+	struct pqi_ctrl_info *ctrl_info;
+
+	ctrl_info = container_of(work, struct pqi_ctrl_info, ctrl_offline_work);
+	pqi_take_ctrl_offline_deferred(ctrl_info);
+}
+
+static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info,
+	enum pqi_ctrl_shutdown_reason ctrl_shutdown_reason)
+{
+	if (!ctrl_info->controller_online)
+		return;
+
+	ctrl_info->controller_online = false;
+	ctrl_info->pqi_mode_enabled = false;
+	pqi_ctrl_block_requests(ctrl_info);
+	if (!pqi_disable_ctrl_shutdown)
+		sis_shutdown_ctrl(ctrl_info, ctrl_shutdown_reason);
+	pci_disable_device(ctrl_info->pci_dev);
+	dev_err(&ctrl_info->pci_dev->dev, "controller offline\n");
+	schedule_work(&ctrl_info->ctrl_offline_work);
+}
+
+static void pqi_print_ctrl_info(struct pci_dev *pci_dev,
+	const struct pci_device_id *id)
+{
+	char *ctrl_description;
+
+	if (id->driver_data)
+		ctrl_description = (char *)id->driver_data;
+	else
+		ctrl_description = "Microchip Smart Family Controller";
+
+	dev_info(&pci_dev->dev, "%s found\n", ctrl_description);
+}
+
+static int pqi_pci_probe(struct pci_dev *pci_dev,
+	const struct pci_device_id *id)
+{
+	int rc;
+	int node;
+	struct pqi_ctrl_info *ctrl_info;
+
+	pqi_print_ctrl_info(pci_dev, id);
+
+	if (pqi_disable_device_id_wildcards &&
+		id->subvendor == PCI_ANY_ID &&
+		id->subdevice == PCI_ANY_ID) {
+		dev_warn(&pci_dev->dev,
+			"controller not probed because device ID wildcards are disabled\n");
+		return -ENODEV;
+	}
+
+	if (id->subvendor == PCI_ANY_ID || id->subdevice == PCI_ANY_ID)
+		dev_warn(&pci_dev->dev,
+			"controller device ID matched using wildcards\n");
+
+	node = dev_to_node(&pci_dev->dev);
+	if (node == NUMA_NO_NODE) {
+		node = cpu_to_node(0);
+		if (node == NUMA_NO_NODE)
+			node = 0;
+		set_dev_node(&pci_dev->dev, node);
+	}
+
+	ctrl_info = pqi_alloc_ctrl_info(node);
+	if (!ctrl_info) {
+		dev_err(&pci_dev->dev,
+			"failed to allocate controller info block\n");
+		return -ENOMEM;
+	}
+
+	ctrl_info->pci_dev = pci_dev;
+
+	rc = pqi_pci_init(ctrl_info);
+	if (rc)
+		goto error;
+
+	rc = pqi_ctrl_init(ctrl_info);
+	if (rc)
+		goto error;
+
+	return 0;
+
+error:
+	pqi_remove_ctrl(ctrl_info);
+
+	return rc;
+}
+
+static void pqi_pci_remove(struct pci_dev *pci_dev)
+{
+	struct pqi_ctrl_info *ctrl_info;
+	u16 vendor_id;
+
+	ctrl_info = pci_get_drvdata(pci_dev);
+	if (!ctrl_info)
+		return;
+
+	pci_read_config_word(ctrl_info->pci_dev, PCI_SUBSYSTEM_VENDOR_ID, &vendor_id);
+	if (vendor_id == 0xffff)
+		ctrl_info->ctrl_removal_state = PQI_CTRL_SURPRISE_REMOVAL;
+	else
+		ctrl_info->ctrl_removal_state = PQI_CTRL_GRACEFUL_REMOVAL;
+
+	pqi_remove_ctrl(ctrl_info);
+}
+
+static void pqi_crash_if_pending_command(struct pqi_ctrl_info *ctrl_info)
+{
+	unsigned int i;
+	struct pqi_io_request *io_request;
+	struct scsi_cmnd *scmd;
+
+	for (i = 0; i < ctrl_info->max_io_slots; i++) {
+		io_request = &ctrl_info->io_request_pool[i];
+		if (atomic_read(&io_request->refcount) == 0)
+			continue;
+		scmd = io_request->scmd;
+		WARN_ON(scmd != NULL); /* IO command from SML */
+		WARN_ON(scmd == NULL); /* Non-IO cmd or driver initiated*/
+	}
+}
+
+static void pqi_shutdown(struct pci_dev *pci_dev)
+{
+	int rc;
+	struct pqi_ctrl_info *ctrl_info;
+	enum bmic_flush_cache_shutdown_event shutdown_event;
+
+	ctrl_info = pci_get_drvdata(pci_dev);
+	if (!ctrl_info) {
+		dev_err(&pci_dev->dev,
+			"cache could not be flushed\n");
+		return;
+	}
+
+	pqi_wait_until_ofa_finished(ctrl_info);
+
+	pqi_scsi_block_requests(ctrl_info);
+	pqi_ctrl_block_device_reset(ctrl_info);
+	pqi_ctrl_block_requests(ctrl_info);
+	pqi_ctrl_wait_until_quiesced(ctrl_info);
+
+	if (system_state == SYSTEM_RESTART)
+		shutdown_event = RESTART;
+	else
+		shutdown_event = SHUTDOWN;
+
+	/*
+	 * Write all data in the controller's battery-backed cache to
+	 * storage.
+	 */
+	rc = pqi_flush_cache(ctrl_info, shutdown_event);
+	if (rc)
+		dev_err(&pci_dev->dev,
+			"unable to flush controller cache\n");
+
+	pqi_crash_if_pending_command(ctrl_info);
+	pqi_reset(ctrl_info);
+}
+
+static void pqi_process_lockup_action_param(void)
+{
+	unsigned int i;
+
+	if (!pqi_lockup_action_param)
+		return;
+
+	for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
+		if (strcmp(pqi_lockup_action_param,
+			pqi_lockup_actions[i].name) == 0) {
+			pqi_lockup_action = pqi_lockup_actions[i].action;
+			return;
+		}
+	}
+
+	pr_warn("%s: invalid lockup action setting \"%s\" - supported settings: none, reboot, panic\n",
+		DRIVER_NAME_SHORT, pqi_lockup_action_param);
+}
+
+#define PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS		30
+#define PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS		(30 * 60)
+
+static void pqi_process_ctrl_ready_timeout_param(void)
+{
+	if (pqi_ctrl_ready_timeout_secs == 0)
+		return;
+
+	if (pqi_ctrl_ready_timeout_secs < PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS) {
+		pr_warn("%s: ctrl_ready_timeout parm of %u second(s) is less than minimum timeout of %d seconds - setting timeout to %d seconds\n",
+			DRIVER_NAME_SHORT, pqi_ctrl_ready_timeout_secs, PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS, PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS);
+		pqi_ctrl_ready_timeout_secs = PQI_CTRL_READY_TIMEOUT_PARAM_MIN_SECS;
+	} else if (pqi_ctrl_ready_timeout_secs > PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS) {
+		pr_warn("%s: ctrl_ready_timeout parm of %u seconds is greater than maximum timeout of %d seconds - setting timeout to %d seconds\n",
+			DRIVER_NAME_SHORT, pqi_ctrl_ready_timeout_secs, PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS, PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS);
+		pqi_ctrl_ready_timeout_secs = PQI_CTRL_READY_TIMEOUT_PARAM_MAX_SECS;
+	}
+
+	sis_ctrl_ready_timeout_secs = pqi_ctrl_ready_timeout_secs;
+}
+
+static void pqi_process_module_params(void)
+{
+	pqi_process_lockup_action_param();
+	pqi_process_ctrl_ready_timeout_param();
+}
+
+#if defined(CONFIG_PM)
+
+static inline enum bmic_flush_cache_shutdown_event pqi_get_flush_cache_shutdown_event(struct pci_dev *pci_dev)
+{
+	if (pci_dev->subsystem_vendor == PCI_VENDOR_ID_ADAPTEC2 && pci_dev->subsystem_device == 0x1304)
+		return RESTART;
+
+	return SUSPEND;
+}
+
+static int pqi_suspend_or_freeze(struct device *dev, bool suspend)
+{
+	struct pci_dev *pci_dev;
+	struct pqi_ctrl_info *ctrl_info;
+
+	pci_dev = to_pci_dev(dev);
+	ctrl_info = pci_get_drvdata(pci_dev);
+
+	pqi_wait_until_ofa_finished(ctrl_info);
+
+	pqi_ctrl_block_scan(ctrl_info);
+	pqi_scsi_block_requests(ctrl_info);
+	pqi_ctrl_block_device_reset(ctrl_info);
+	pqi_ctrl_block_requests(ctrl_info);
+	pqi_ctrl_wait_until_quiesced(ctrl_info);
+
+	if (suspend) {
+		enum bmic_flush_cache_shutdown_event shutdown_event;
+
+		shutdown_event = pqi_get_flush_cache_shutdown_event(pci_dev);
+		pqi_flush_cache(ctrl_info, shutdown_event);
+	}
+
+	pqi_stop_heartbeat_timer(ctrl_info);
+	pqi_crash_if_pending_command(ctrl_info);
+	pqi_free_irqs(ctrl_info);
+
+	ctrl_info->controller_online = false;
+	ctrl_info->pqi_mode_enabled = false;
+
+	return 0;
+}
+
+static __maybe_unused int pqi_suspend(struct device *dev)
+{
+	return pqi_suspend_or_freeze(dev, true);
+}
+
+static int pqi_resume_or_restore(struct device *dev)
+{
+	int rc;
+	struct pci_dev *pci_dev;
+	struct pqi_ctrl_info *ctrl_info;
+
+	pci_dev = to_pci_dev(dev);
+	ctrl_info = pci_get_drvdata(pci_dev);
+
+	rc = pqi_request_irqs(ctrl_info);
+	if (rc)
+		return rc;
+
+	pqi_ctrl_unblock_device_reset(ctrl_info);
+	pqi_ctrl_unblock_requests(ctrl_info);
+	pqi_scsi_unblock_requests(ctrl_info);
+	pqi_ctrl_unblock_scan(ctrl_info);
+
+	ssleep(PQI_POST_RESET_DELAY_SECS);
+
+	return pqi_ctrl_init_resume(ctrl_info);
+}
+
+static int pqi_freeze(struct device *dev)
+{
+	return pqi_suspend_or_freeze(dev, false);
+}
+
+static int pqi_thaw(struct device *dev)
+{
+	int rc;
+	struct pci_dev *pci_dev;
+	struct pqi_ctrl_info *ctrl_info;
+
+	pci_dev = to_pci_dev(dev);
+	ctrl_info = pci_get_drvdata(pci_dev);
+
+	rc = pqi_request_irqs(ctrl_info);
+	if (rc)
+		return rc;
+
+	ctrl_info->controller_online = true;
+	ctrl_info->pqi_mode_enabled = true;
+
+	pqi_ctrl_unblock_device_reset(ctrl_info);
+	pqi_ctrl_unblock_requests(ctrl_info);
+	pqi_scsi_unblock_requests(ctrl_info);
+	pqi_ctrl_unblock_scan(ctrl_info);
+
+	return 0;
+}
+
+static int pqi_poweroff(struct device *dev)
+{
+	struct pci_dev *pci_dev;
+	struct pqi_ctrl_info *ctrl_info;
+	enum bmic_flush_cache_shutdown_event shutdown_event;
+
+	pci_dev = to_pci_dev(dev);
+	ctrl_info = pci_get_drvdata(pci_dev);
+
+	shutdown_event = pqi_get_flush_cache_shutdown_event(pci_dev);
+	pqi_flush_cache(ctrl_info, shutdown_event);
+
+	return 0;
+}
+
+static const struct dev_pm_ops pqi_pm_ops = {
+	.suspend = pqi_suspend,
+	.resume = pqi_resume_or_restore,
+	.freeze = pqi_freeze,
+	.thaw = pqi_thaw,
+	.poweroff = pqi_poweroff,
+	.restore = pqi_resume_or_restore,
+};
+
+#endif /* CONFIG_PM */
+
+/* Define the PCI IDs for the controllers that we support. */
+static const struct pci_device_id pqi_pci_id_table[] = {
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x105b, 0x1211)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x105b, 0x1321)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x152d, 0x8a22)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x152d, 0x8a23)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x152d, 0x8a24)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x152d, 0x8a36)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x152d, 0x8a37)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x193d, 0x1104)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x193d, 0x1105)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x193d, 0x1106)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x193d, 0x1107)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x193d, 0x1108)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x193d, 0x1109)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x193d, 0x110b)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x193d, 0x8460)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x193d, 0x8461)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x193d, 0xc460)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x193d, 0xc461)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x193d, 0xf460)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x193d, 0xf461)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x0045)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x0046)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x0047)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x0048)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x004a)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x004b)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x004c)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x004f)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x0051)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x0052)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x0053)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x0054)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x006b)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x006c)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x006d)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x006f)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x0070)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x0071)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x0072)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x0086)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x0087)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x0088)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1bd4, 0x0089)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x19e5, 0xd227)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x19e5, 0xd228)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x19e5, 0xd229)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x19e5, 0xd22a)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x19e5, 0xd22b)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x19e5, 0xd22c)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0110)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0608)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0659)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0800)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0801)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0802)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0803)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0804)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0805)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0806)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0807)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0808)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0809)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x080a)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0900)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0901)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0902)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0903)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0904)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0905)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0906)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0907)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x0908)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x090a)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1200)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1201)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1202)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1280)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1281)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1282)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1300)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1301)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1302)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1303)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1304)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1380)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1400)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1402)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1410)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1411)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1412)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1420)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1430)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1440)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1441)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1450)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1452)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1460)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1461)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1462)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1463)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1470)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1471)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1472)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1473)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1474)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1475)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1480)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1490)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x1491)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x14a0)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x14a1)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x14a2)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x14a4)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x14a5)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x14a6)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x14b0)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x14b1)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x14c0)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x14c1)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x14c2)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x14c3)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x14c4)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x14d0)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x14e0)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADAPTEC2, 0x14f0)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_ADVANTECH, 0x8312)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_DELL, 0x1fe0)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_HP, 0x0600)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_HP, 0x0601)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_HP, 0x0602)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_HP, 0x0603)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_HP, 0x0609)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_HP, 0x0650)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_HP, 0x0651)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_HP, 0x0652)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_HP, 0x0653)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_HP, 0x0654)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_HP, 0x0655)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_HP, 0x0700)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_HP, 0x0701)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_HP, 0x1001)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_HP, 0x1002)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_HP, 0x1100)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_HP, 0x1101)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1590, 0x0294)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1590, 0x02db)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1590, 0x02dc)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1590, 0x032e)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1590, 0x036f)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1590, 0x0381)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1590, 0x0382)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1590, 0x0383)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1d8d, 0x0800)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1d8d, 0x0908)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1d8d, 0x0806)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1d8d, 0x0916)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_GIGABYTE, 0x1000)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1dfc, 0x3161)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1f0c, 0x3161)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1cf2, 0x5445)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1cf2, 0x5446)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1cf2, 0x5447)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1cf2, 0x5449)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1cf2, 0x544a)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1cf2, 0x544b)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1cf2, 0x544d)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1cf2, 0x544e)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1cf2, 0x544f)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1cf2, 0x0b27)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1cf2, 0x0b29)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1cf2, 0x0b45)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1cc4, 0x0101)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       0x1cc4, 0x0201)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_LENOVO, 0x0220)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_LENOVO, 0x0221)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_LENOVO, 0x0520)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_LENOVO, 0x0522)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_LENOVO, 0x0620)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_LENOVO, 0x0621)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_LENOVO, 0x0622)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_VENDOR_ID_LENOVO, 0x0623)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+				0x1e93, 0x1000)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+				0x1e93, 0x1001)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+				0x1e93, 0x1002)
+	},
+	{
+		PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+			       PCI_ANY_ID, PCI_ANY_ID)
+	},
+	{ 0 }
+};
+
+MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
+
+static struct pci_driver pqi_pci_driver = {
+	.name = DRIVER_NAME_SHORT,
+	.id_table = pqi_pci_id_table,
+	.probe = pqi_pci_probe,
+	.remove = pqi_pci_remove,
+	.shutdown = pqi_shutdown,
+#if defined(CONFIG_PM)
+	.driver = {
+		.pm = &pqi_pm_ops
+	},
+#endif
+};
+
+static int __init pqi_init(void)
+{
+	int rc;
+
+	pr_info(DRIVER_NAME "\n");
+	pqi_verify_structures();
+	sis_verify_structures();
+
+	pqi_sas_transport_template = sas_attach_transport(&pqi_sas_transport_functions);
+	if (!pqi_sas_transport_template)
+		return -ENODEV;
+
+	pqi_process_module_params();
+
+	rc = pci_register_driver(&pqi_pci_driver);
+	if (rc)
+		sas_release_transport(pqi_sas_transport_template);
+
+	return rc;
+}
+
+static void __exit pqi_cleanup(void)
+{
+	pci_unregister_driver(&pqi_pci_driver);
+	sas_release_transport(pqi_sas_transport_template);
+}
+
+module_init(pqi_init);
+module_exit(pqi_cleanup);
+
+static void pqi_verify_structures(void)
+{
+	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
+		sis_host_to_ctrl_doorbell) != 0x20);
+	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
+		sis_interrupt_mask) != 0x34);
+	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
+		sis_ctrl_to_host_doorbell) != 0x9c);
+	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
+		sis_ctrl_to_host_doorbell_clear) != 0xa0);
+	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
+		sis_driver_scratch) != 0xb0);
+	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
+		sis_product_identifier) != 0xb4);
+	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
+		sis_firmware_status) != 0xbc);
+	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
+		sis_ctrl_shutdown_reason_code) != 0xcc);
+	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
+		sis_mailbox) != 0x1000);
+	BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
+		pqi_registers) != 0x4000);
+
+	BUILD_BUG_ON(offsetof(struct pqi_iu_header,
+		iu_type) != 0x0);
+	BUILD_BUG_ON(offsetof(struct pqi_iu_header,
+		iu_length) != 0x2);
+	BUILD_BUG_ON(offsetof(struct pqi_iu_header,
+		response_queue_id) != 0x4);
+	BUILD_BUG_ON(offsetof(struct pqi_iu_header,
+		driver_flags) != 0x6);
+	BUILD_BUG_ON(sizeof(struct pqi_iu_header) != 0x8);
+
+	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
+		status) != 0x0);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
+		service_response) != 0x1);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
+		data_present) != 0x2);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
+		reserved) != 0x3);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
+		residual_count) != 0x4);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
+		data_length) != 0x8);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
+		reserved1) != 0xa);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
+		data) != 0xc);
+	BUILD_BUG_ON(sizeof(struct pqi_aio_error_info) != 0x10c);
+
+	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
+		data_in_result) != 0x0);
+	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
+		data_out_result) != 0x1);
+	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
+		reserved) != 0x2);
+	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
+		status) != 0x5);
+	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
+		status_qualifier) != 0x6);
+	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
+		sense_data_length) != 0x8);
+	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
+		response_data_length) != 0xa);
+	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
+		data_in_transferred) != 0xc);
+	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
+		data_out_transferred) != 0x10);
+	BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
+		data) != 0x14);
+	BUILD_BUG_ON(sizeof(struct pqi_raid_error_info) != 0x114);
+
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		signature) != 0x0);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		function_and_status_code) != 0x8);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		max_admin_iq_elements) != 0x10);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		max_admin_oq_elements) != 0x11);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		admin_iq_element_length) != 0x12);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		admin_oq_element_length) != 0x13);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		max_reset_timeout) != 0x14);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		legacy_intx_status) != 0x18);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		legacy_intx_mask_set) != 0x1c);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		legacy_intx_mask_clear) != 0x20);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		device_status) != 0x40);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		admin_iq_pi_offset) != 0x48);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		admin_oq_ci_offset) != 0x50);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		admin_iq_element_array_addr) != 0x58);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		admin_oq_element_array_addr) != 0x60);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		admin_iq_ci_addr) != 0x68);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		admin_oq_pi_addr) != 0x70);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		admin_iq_num_elements) != 0x78);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		admin_oq_num_elements) != 0x79);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		admin_queue_int_msg_num) != 0x7a);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		device_error) != 0x80);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		error_details) != 0x88);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		device_reset) != 0x90);
+	BUILD_BUG_ON(offsetof(struct pqi_device_registers,
+		power_action) != 0x94);
+	BUILD_BUG_ON(sizeof(struct pqi_device_registers) != 0x100);
+
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		header.iu_type) != 0);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		header.iu_length) != 2);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		header.driver_flags) != 6);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		request_id) != 8);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		function_code) != 10);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		data.report_device_capability.buffer_length) != 44);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		data.report_device_capability.sg_descriptor) != 48);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		data.create_operational_iq.queue_id) != 12);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		data.create_operational_iq.element_array_addr) != 16);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		data.create_operational_iq.ci_addr) != 24);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		data.create_operational_iq.num_elements) != 32);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		data.create_operational_iq.element_length) != 34);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		data.create_operational_iq.queue_protocol) != 36);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		data.create_operational_oq.queue_id) != 12);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		data.create_operational_oq.element_array_addr) != 16);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		data.create_operational_oq.pi_addr) != 24);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		data.create_operational_oq.num_elements) != 32);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		data.create_operational_oq.element_length) != 34);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		data.create_operational_oq.queue_protocol) != 36);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		data.create_operational_oq.int_msg_num) != 40);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		data.create_operational_oq.coalescing_count) != 42);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		data.create_operational_oq.min_coalescing_time) != 44);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		data.create_operational_oq.max_coalescing_time) != 48);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
+		data.delete_operational_queue.queue_id) != 12);
+	BUILD_BUG_ON(sizeof(struct pqi_general_admin_request) != 64);
+	BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
+		data.create_operational_iq) != 64 - 11);
+	BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
+		data.create_operational_oq) != 64 - 11);
+	BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request,
+		data.delete_operational_queue) != 64 - 11);
+
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
+		header.iu_type) != 0);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
+		header.iu_length) != 2);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
+		header.driver_flags) != 6);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
+		request_id) != 8);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
+		function_code) != 10);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
+		status) != 11);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
+		data.create_operational_iq.status_descriptor) != 12);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
+		data.create_operational_iq.iq_pi_offset) != 16);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
+		data.create_operational_oq.status_descriptor) != 12);
+	BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
+		data.create_operational_oq.oq_ci_offset) != 16);
+	BUILD_BUG_ON(sizeof(struct pqi_general_admin_response) != 64);
+
+	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+		header.iu_type) != 0);
+	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+		header.iu_length) != 2);
+	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+		header.response_queue_id) != 4);
+	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+		header.driver_flags) != 6);
+	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+		request_id) != 8);
+	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+		nexus_id) != 10);
+	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+		buffer_length) != 12);
+	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+		lun_number) != 16);
+	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+		protocol_specific) != 24);
+	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+		error_index) != 27);
+	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+		cdb) != 32);
+	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+		timeout) != 60);
+	BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
+		sg_descriptors) != 64);
+	BUILD_BUG_ON(sizeof(struct pqi_raid_path_request) !=
+		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
+
+	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+		header.iu_type) != 0);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+		header.iu_length) != 2);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+		header.response_queue_id) != 4);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+		header.driver_flags) != 6);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+		request_id) != 8);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+		nexus_id) != 12);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+		buffer_length) != 16);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+		data_encryption_key_index) != 22);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+		encrypt_tweak_lower) != 24);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+		encrypt_tweak_upper) != 28);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+		cdb) != 32);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+		error_index) != 48);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+		num_sg_descriptors) != 50);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+		cdb_length) != 51);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+		lun_number) != 52);
+	BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
+		sg_descriptors) != 64);
+	BUILD_BUG_ON(sizeof(struct pqi_aio_path_request) !=
+		PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
+
+	BUILD_BUG_ON(offsetof(struct pqi_io_response,
+		header.iu_type) != 0);
+	BUILD_BUG_ON(offsetof(struct pqi_io_response,
+		header.iu_length) != 2);
+	BUILD_BUG_ON(offsetof(struct pqi_io_response,
+		request_id) != 8);
+	BUILD_BUG_ON(offsetof(struct pqi_io_response,
+		error_index) != 10);
+
+	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
+		header.iu_type) != 0);
+	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
+		header.iu_length) != 2);
+	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
+		header.response_queue_id) != 4);
+	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
+		request_id) != 8);
+	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
+		data.report_event_configuration.buffer_length) != 12);
+	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
+		data.report_event_configuration.sg_descriptors) != 16);
+	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
+		data.set_event_configuration.global_event_oq_id) != 10);
+	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
+		data.set_event_configuration.buffer_length) != 12);
+	BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
+		data.set_event_configuration.sg_descriptors) != 16);
+
+	BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
+		max_inbound_iu_length) != 6);
+	BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
+		max_outbound_iu_length) != 14);
+	BUILD_BUG_ON(sizeof(struct pqi_iu_layer_descriptor) != 16);
+
+	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+		data_length) != 0);
+	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+		iq_arbitration_priority_support_bitmask) != 8);
+	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+		maximum_aw_a) != 9);
+	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+		maximum_aw_b) != 10);
+	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+		maximum_aw_c) != 11);
+	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+		max_inbound_queues) != 16);
+	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+		max_elements_per_iq) != 18);
+	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+		max_iq_element_length) != 24);
+	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+		min_iq_element_length) != 26);
+	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+		max_outbound_queues) != 30);
+	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+		max_elements_per_oq) != 32);
+	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+		intr_coalescing_time_granularity) != 34);
+	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+		max_oq_element_length) != 36);
+	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+		min_oq_element_length) != 38);
+	BUILD_BUG_ON(offsetof(struct pqi_device_capability,
+		iu_layer_descriptors) != 64);
+	BUILD_BUG_ON(sizeof(struct pqi_device_capability) != 576);
+
+	BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
+		event_type) != 0);
+	BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
+		oq_id) != 2);
+	BUILD_BUG_ON(sizeof(struct pqi_event_descriptor) != 4);
+
+	BUILD_BUG_ON(offsetof(struct pqi_event_config,
+		num_event_descriptors) != 2);
+	BUILD_BUG_ON(offsetof(struct pqi_event_config,
+		descriptors) != 4);
+
+	BUILD_BUG_ON(PQI_NUM_SUPPORTED_EVENTS !=
+		ARRAY_SIZE(pqi_supported_event_types));
+
+	BUILD_BUG_ON(offsetof(struct pqi_event_response,
+		header.iu_type) != 0);
+	BUILD_BUG_ON(offsetof(struct pqi_event_response,
+		header.iu_length) != 2);
+	BUILD_BUG_ON(offsetof(struct pqi_event_response,
+		event_type) != 8);
+	BUILD_BUG_ON(offsetof(struct pqi_event_response,
+		event_id) != 10);
+	BUILD_BUG_ON(offsetof(struct pqi_event_response,
+		additional_event_id) != 12);
+	BUILD_BUG_ON(offsetof(struct pqi_event_response,
+		data) != 16);
+	BUILD_BUG_ON(sizeof(struct pqi_event_response) != 32);
+
+	BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
+		header.iu_type) != 0);
+	BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
+		header.iu_length) != 2);
+	BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
+		event_type) != 8);
+	BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
+		event_id) != 10);
+	BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
+		additional_event_id) != 12);
+	BUILD_BUG_ON(sizeof(struct pqi_event_acknowledge_request) != 16);
+
+	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
+		header.iu_type) != 0);
+	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
+		header.iu_length) != 2);
+	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
+		request_id) != 8);
+	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
+		nexus_id) != 10);
+	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
+		timeout) != 14);
+	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
+		lun_number) != 16);
+	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
+		protocol_specific) != 24);
+	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
+		outbound_queue_id_to_manage) != 26);
+	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
+		request_id_to_manage) != 28);
+	BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
+		task_management_function) != 30);
+	BUILD_BUG_ON(sizeof(struct pqi_task_management_request) != 32);
+
+	BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
+		header.iu_type) != 0);
+	BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
+		header.iu_length) != 2);
+	BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
+		request_id) != 8);
+	BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
+		nexus_id) != 10);
+	BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
+		additional_response_info) != 12);
+	BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
+		response_code) != 15);
+	BUILD_BUG_ON(sizeof(struct pqi_task_management_response) != 16);
+
+	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
+		configured_logical_drive_count) != 0);
+	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
+		configuration_signature) != 1);
+	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
+		firmware_version_short) != 5);
+	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
+		extended_logical_unit_count) != 154);
+	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
+		firmware_build_number) != 190);
+	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
+		vendor_id) != 200);
+	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
+		product_id) != 208);
+	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
+		extra_controller_flags) != 286);
+	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
+		controller_mode) != 292);
+	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
+		spare_part_number) != 293);
+	BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
+		firmware_version_long) != 325);
+
+	BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
+		phys_bay_in_box) != 115);
+	BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
+		device_type) != 120);
+	BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
+		redundant_path_present_map) != 1736);
+	BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
+		active_path_number) != 1738);
+	BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
+		alternate_paths_phys_connector) != 1739);
+	BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
+		alternate_paths_phys_box_on_port) != 1755);
+	BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
+		current_queue_depth_limit) != 1796);
+	BUILD_BUG_ON(sizeof(struct bmic_identify_physical_device) != 2560);
+
+	BUILD_BUG_ON(sizeof(struct bmic_sense_feature_buffer_header) != 4);
+	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_buffer_header,
+		page_code) != 0);
+	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_buffer_header,
+		subpage_code) != 1);
+	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_buffer_header,
+		buffer_length) != 2);
+
+	BUILD_BUG_ON(sizeof(struct bmic_sense_feature_page_header) != 4);
+	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_page_header,
+		page_code) != 0);
+	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_page_header,
+		subpage_code) != 1);
+	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_page_header,
+		page_length) != 2);
+
+	BUILD_BUG_ON(sizeof(struct bmic_sense_feature_io_page_aio_subpage)
+		!= 18);
+	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
+		header) != 0);
+	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
+		firmware_read_support) != 4);
+	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
+		driver_read_support) != 5);
+	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
+		firmware_write_support) != 6);
+	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
+		driver_write_support) != 7);
+	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
+		max_transfer_encrypted_sas_sata) != 8);
+	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
+		max_transfer_encrypted_nvme) != 10);
+	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
+		max_write_raid_5_6) != 12);
+	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
+		max_write_raid_1_10_2drive) != 14);
+	BUILD_BUG_ON(offsetof(struct bmic_sense_feature_io_page_aio_subpage,
+		max_write_raid_1_10_3drive) != 16);
+
+	BUILD_BUG_ON(PQI_ADMIN_IQ_NUM_ELEMENTS > 255);
+	BUILD_BUG_ON(PQI_ADMIN_OQ_NUM_ELEMENTS > 255);
+	BUILD_BUG_ON(PQI_ADMIN_IQ_ELEMENT_LENGTH %
+		PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
+	BUILD_BUG_ON(PQI_ADMIN_OQ_ELEMENT_LENGTH %
+		PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
+	BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH > 1048560);
+	BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH %
+		PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
+	BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH > 1048560);
+	BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH %
+		PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
+
+	BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= PQI_MAX_OUTSTANDING_REQUESTS);
+	BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >=
+		PQI_MAX_OUTSTANDING_REQUESTS_KDUMP);
+}