blob: 83bdbd84eb01f427e9d74d56526b2e1f1ceb9e33 [file] [log] [blame]
/*
* driver for Microsemi PQI-based storage controllers
* Copyright (c) 2016-2017 Microsemi Corporation
* Copyright (c) 2016 PMC-Sierra, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for more details.
*
* Questions/Comments/Bugfixes to esc.storagedev@microsemi.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 "1.1.2-125"
#define DRIVER_MAJOR 1
#define DRIVER_MINOR 1
#define DRIVER_RELEASE 2
#define DRIVER_REVISION 125
#define DRIVER_NAME "Microsemi PQI Driver (v" \
DRIVER_VERSION BUILD_TIMESTAMP ")"
#define DRIVER_NAME_SHORT "smartpqi"
#define PQI_EXTRA_SGL_MEMORY (12 * sizeof(struct pqi_sg_descriptor))
MODULE_AUTHOR("Microsemi");
MODULE_DESCRIPTION("Driver for Microsemi Smart Family Controller version "
DRIVER_VERSION);
MODULE_SUPPORTED_DEVICE("Microsemi Smart Family Controllers");
MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL");
static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info);
static void pqi_ctrl_offline_worker(struct work_struct *work);
static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info);
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, unsigned long timeout_msecs);
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);
/* 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_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 char *raid_levels[] = {
"RAID-0",
"RAID-4",
"RAID-1(1+0)",
"RAID-5",
"RAID-5+1",
"RAID-ADG",
"RAID-1(ADM)",
};
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_ADM 6 /* also used for RAID 1+0 ADM */
#define SA_RAID_MAX SA_RAID_ADM
#define SA_RAID_UNKNOWN 0xff
static inline void pqi_scsi_done(struct scsi_cmnd *scmd)
{
pqi_prep_for_scsi_done(scmd);
scmd->scsi_done(scmd);
}
static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2)
{
return memcmp(scsi3addr1, scsi3addr2, 8) == 0;
}
static inline struct pqi_ctrl_info *shost_to_hba(struct Scsi_Host *shost)
{
void *hostdata = shost_priv(shost);
return *((struct pqi_ctrl_info **)hostdata);
}
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);
}
static inline bool pqi_is_hba_lunid(u8 *scsi3addr)
{
return pqi_scsi3addr_equal(scsi3addr, RAID_CTLR_LUNID);
}
static inline enum pqi_ctrl_mode pqi_get_ctrl_mode(
struct pqi_ctrl_info *ctrl_info)
{
return sis_read_driver_scratch(ctrl_info);
}
static inline void pqi_save_ctrl_mode(struct pqi_ctrl_info *ctrl_info,
enum pqi_ctrl_mode mode)
{
sis_write_driver_scratch(ctrl_info, mode);
}
static inline void pqi_ctrl_block_requests(struct pqi_ctrl_info *ctrl_info)
{
ctrl_info->block_requests = true;
scsi_block_requests(ctrl_info->scsi_host);
}
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);
pqi_retry_raid_bypass_requests(ctrl_info);
scsi_unblock_requests(ctrl_info->scsi_host);
}
static inline bool pqi_ctrl_blocked(struct pqi_ctrl_info *ctrl_info)
{
return ctrl_info->block_requests;
}
static unsigned long pqi_wait_if_ctrl_blocked(struct pqi_ctrl_info *ctrl_info,
unsigned long timeout_msecs)
{
unsigned long remaining_msecs;
if (!pqi_ctrl_blocked(ctrl_info))
return timeout_msecs;
atomic_inc(&ctrl_info->num_blocked_threads);
if (timeout_msecs == NO_TIMEOUT) {
wait_event(ctrl_info->block_requests_wait,
!pqi_ctrl_blocked(ctrl_info));
remaining_msecs = timeout_msecs;
} else {
unsigned long remaining_jiffies;
remaining_jiffies =
wait_event_timeout(ctrl_info->block_requests_wait,
!pqi_ctrl_blocked(ctrl_info),
msecs_to_jiffies(timeout_msecs));
remaining_msecs = jiffies_to_msecs(remaining_jiffies);
}
atomic_dec(&ctrl_info->num_blocked_threads);
return remaining_msecs;
}
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 void pqi_ctrl_wait_until_quiesced(struct pqi_ctrl_info *ctrl_info)
{
while (atomic_read(&ctrl_info->num_busy_threads) >
atomic_read(&ctrl_info->num_blocked_threads))
usleep_range(1000, 2000);
}
static inline bool pqi_device_offline(struct pqi_scsi_dev *device)
{
return device->device_offline;
}
static inline void pqi_device_reset_start(struct pqi_scsi_dev *device)
{
device->in_reset = true;
}
static inline void pqi_device_reset_done(struct pqi_scsi_dev *device)
{
device->in_reset = false;
}
static inline bool pqi_device_in_reset(struct pqi_scsi_dev *device)
{
return device->in_reset;
}
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 int pqi_map_single(struct pci_dev *pci_dev,
struct pqi_sg_descriptor *sg_descriptor, void *buffer,
size_t buffer_length, int data_direction)
{
dma_addr_t bus_address;
if (!buffer || buffer_length == 0 || data_direction == PCI_DMA_NONE)
return 0;
bus_address = pci_map_single(pci_dev, buffer, buffer_length,
data_direction);
if (pci_dma_mapping_error(pci_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,
int data_direction)
{
int i;
if (data_direction == PCI_DMA_NONE)
return;
for (i = 0; i < num_descriptors; i++)
pci_unmap_single(pci_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, int *pci_direction)
{
u8 *cdb;
int pci_dir;
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 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)buffer_length;
break;
case CISS_REPORT_LOG:
case CISS_REPORT_PHYS:
request->data_direction = SOP_READ_FLAG;
cdb[0] = cmd;
if (cmd == CISS_REPORT_PHYS)
cdb[1] = CISS_REPORT_PHYS_EXTENDED;
else
cdb[1] = CISS_REPORT_LOG_EXTENDED;
put_unaligned_be32(buffer_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(buffer_length, &cdb[6]);
break;
case SA_FLUSH_CACHE:
request->data_direction = SOP_WRITE_FLAG;
cdb[0] = BMIC_WRITE;
cdb[6] = BMIC_FLUSH_CACHE;
put_unaligned_be16(buffer_length, &cdb[7]);
break;
case BMIC_IDENTIFY_CONTROLLER:
case BMIC_IDENTIFY_PHYSICAL_DEVICE:
request->data_direction = SOP_READ_FLAG;
cdb[0] = BMIC_READ;
cdb[6] = cmd;
put_unaligned_be16(buffer_length, &cdb[7]);
break;
case BMIC_WRITE_HOST_WELLNESS:
request->data_direction = SOP_WRITE_FLAG;
cdb[0] = BMIC_WRITE;
cdb[6] = cmd;
put_unaligned_be16(buffer_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:
pci_dir = PCI_DMA_FROMDEVICE;
break;
case SOP_WRITE_FLAG:
pci_dir = PCI_DMA_TODEVICE;
break;
case SOP_NO_DIRECTION_FLAG:
pci_dir = PCI_DMA_NONE;
break;
default:
pci_dir = PCI_DMA_BIDIRECTIONAL;
break;
}
*pci_direction = pci_dir;
return pqi_map_single(ctrl_info->pci_dev, &request->sg_descriptors[0],
buffer, buffer_length, pci_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_identify_controller(struct pqi_ctrl_info *ctrl_info,
struct bmic_identify_controller *buffer)
{
int rc;
int pci_direction;
struct pqi_raid_path_request request;
rc = pqi_build_raid_path_request(ctrl_info, &request,
BMIC_IDENTIFY_CONTROLLER, RAID_CTLR_LUNID, buffer,
sizeof(*buffer), 0, &pci_direction);
if (rc)
return rc;
rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
NULL, NO_TIMEOUT);
pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
pci_direction);
return rc;
}
static int pqi_scsi_inquiry(struct pqi_ctrl_info *ctrl_info,
u8 *scsi3addr, u16 vpd_page, void *buffer, size_t buffer_length)
{
int rc;
int pci_direction;
struct pqi_raid_path_request request;
rc = pqi_build_raid_path_request(ctrl_info, &request,
INQUIRY, scsi3addr, buffer, buffer_length, vpd_page,
&pci_direction);
if (rc)
return rc;
rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
NULL, NO_TIMEOUT);
pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
pci_direction);
return rc;
}
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;
int pci_direction;
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, &pci_direction);
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, NO_TIMEOUT);
pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
pci_direction);
return rc;
}
static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info,
enum bmic_flush_cache_shutdown_event shutdown_event)
{
int rc;
struct pqi_raid_path_request request;
int pci_direction;
struct bmic_flush_cache *flush_cache;
/*
* Don't bother trying to flush the cache if the controller is
* locked up.
*/
if (pqi_ctrl_offline(ctrl_info))
return -ENXIO;
flush_cache = kzalloc(sizeof(*flush_cache), GFP_KERNEL);
if (!flush_cache)
return -ENOMEM;
flush_cache->shutdown_event = shutdown_event;
rc = pqi_build_raid_path_request(ctrl_info, &request,
SA_FLUSH_CACHE, RAID_CTLR_LUNID, flush_cache,
sizeof(*flush_cache), 0, &pci_direction);
if (rc)
goto out;
rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
0, NULL, NO_TIMEOUT);
pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
pci_direction);
out:
kfree(flush_cache);
return rc;
}
static int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info,
void *buffer, size_t buffer_length)
{
int rc;
struct pqi_raid_path_request request;
int pci_direction;
rc = pqi_build_raid_path_request(ctrl_info, &request,
BMIC_WRITE_HOST_WELLNESS, RAID_CTLR_LUNID, buffer,
buffer_length, 0, &pci_direction);
if (rc)
return rc;
rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
0, NULL, NO_TIMEOUT);
pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
pci_direction);
return rc;
}
#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 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->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);
if (pqi_ctrl_offline(ctrl_info))
return;
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 int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
void *buffer, size_t buffer_length)
{
int rc;
int pci_direction;
struct pqi_raid_path_request request;
rc = pqi_build_raid_path_request(ctrl_info, &request,
cmd, RAID_CTLR_LUNID, buffer, buffer_length, 0, &pci_direction);
if (rc)
return rc;
rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
NULL, NO_TIMEOUT);
pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
pci_direction);
return rc;
}
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)
{
return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS,
buffer);
}
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_extended **physdev_list,
struct report_log_lun_extended **logdev_list)
{
int rc;
size_t logdev_list_length;
size_t logdev_data_length;
struct report_log_lun_extended *internal_logdev_list;
struct report_log_lun_extended *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_extended *)&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_extended), 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_extended_entry));
put_unaligned_be32(logdev_list_length +
sizeof(struct report_log_lun_extended_entry),
&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;
unsigned int num_phys_disks;
unsigned int num_raid_map_entries;
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 (raid_map_size > sizeof(*raid_map)) {
err_msg = "RAID map too large";
goto bad_raid_map;
}
num_phys_disks = get_unaligned_le16(&raid_map->layout_map_count) *
(get_unaligned_le16(&raid_map->data_disks_per_row) +
get_unaligned_le16(&raid_map->metadata_disks_per_row));
num_raid_map_entries = num_phys_disks *
get_unaligned_le16(&raid_map->row_cnt);
if (num_raid_map_entries > RAID_MAP_MAX_ENTRIES) {
err_msg = "invalid number of map entries in RAID map";
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_ADM) {
if (get_unaligned_le16(&raid_map->layout_map_count) != 3) {
err_msg = "invalid RAID-1(ADM) 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,
"scsi %d:%d:%d:%d %s\n",
ctrl_info->scsi_host->host_no,
device->bus, device->target, device->lun, err_msg);
return -EINVAL;
}
static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info,
struct pqi_scsi_dev *device)
{
int rc;
int pci_direction;
struct pqi_raid_path_request request;
struct raid_map *raid_map;
raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL);
if (!raid_map)
return -ENOMEM;
rc = pqi_build_raid_path_request(ctrl_info, &request,
CISS_GET_RAID_MAP, device->scsi3addr, raid_map,
sizeof(*raid_map), 0, &pci_direction);
if (rc)
goto error;
rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
NULL, NO_TIMEOUT);
pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
pci_direction);
if (rc)
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_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;
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;
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;
}
static int pqi_get_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 (pqi_is_logical_device(device) && 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;
}
static void pqi_get_physical_disk_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;
}
device->queue_depth =
get_unaligned_le16(&id_phys->current_queue_depth_limit);
device->device_type = id_phys->device_type;
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;
}
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;
}
static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info,
struct pqi_scsi_dev *device)
{
if (pqi_is_logical_device(device))
scsi_remove_device(device->sdev);
else
pqi_remove_sas_device(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 dev1->wwid == dev2->wwid;
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;
}
#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 = snprintf(buffer, PQI_DEV_INFO_BUFFER_LENGTH,
"%d:%d:", ctrl_info->scsi_host->host_no, device->bus);
if (device->target_lun_valid)
count += snprintf(buffer + count,
PQI_DEV_INFO_BUFFER_LENGTH - count,
"%d:%d",
device->target,
device->lun);
else
count += snprintf(buffer + count,
PQI_DEV_INFO_BUFFER_LENGTH - count,
"-:-");
if (pqi_is_logical_device(device))
count += snprintf(buffer + count,
PQI_DEV_INFO_BUFFER_LENGTH - count,
" %08x%08x",
*((u32 *)&device->scsi3addr),
*((u32 *)&device->scsi3addr[4]));
else
count += snprintf(buffer + count,
PQI_DEV_INFO_BUFFER_LENGTH - count,
" %016llx", device->sas_address);
count += snprintf(buffer + count, PQI_DEV_INFO_BUFFER_LENGTH - count,
" %s %.8s %.16s ",
scsi_device_type(device->devtype),
device->vendor,
device->model);
if (pqi_is_logical_device(device)) {
if (device->devtype == TYPE_DISK)
count += snprintf(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 += snprintf(buffer + count,
PQI_DEV_INFO_BUFFER_LENGTH - count,
"AIO%c", device->aio_enabled ? '+' : '-');
if (device->devtype == TYPE_DISK ||
device->devtype == TYPE_ZBC)
count += snprintf(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);
}
/* Assumes the SCSI device list lock is held. */
static void pqi_scsi_update_device(struct pqi_scsi_dev *existing_device,
struct pqi_scsi_dev *new_device)
{
existing_device->devtype = new_device->devtype;
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;
existing_device->is_external_raid_device =
new_device->is_external_raid_device;
existing_device->aio_enabled = new_device->aio_enabled;
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->raid_level = new_device->raid_level;
existing_device->queue_depth = new_device->queue_depth;
existing_device->aio_handle = new_device->aio_handle;
existing_device->volume_status = new_device->volume_status;
existing_device->active_path_index = new_device->active_path_index;
existing_device->path_map = new_device->path_map;
existing_device->bay = new_device->bay;
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));
existing_device->offload_to_mirror = 0;
kfree(existing_device->raid_map);
existing_device->raid_map = new_device->raid_map;
existing_device->raid_bypass_configured =
new_device->raid_bypass_configured;
existing_device->raid_bypass_enabled =
new_device->raid_bypass_enabled;
/* To prevent this from being freed later. */
new_device->raid_map = NULL;
}
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 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(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);
/* 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 (device->sdev)
pqi_remove_device(ctrl_info, device);
list_del(&device->delete_list_entry);
pqi_free_device(device);
}
/*
* Notify the SCSI ML if the queue depth of any existing device has
* changed.
*/
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);
}
}
/* Expose any new devices. */
list_for_each_entry_safe(device, next, &add_list, add_list_entry) {
if (!device->sdev) {
pqi_dev_info(ctrl_info, "added", device);
rc = pqi_add_device(ctrl_info, device);
if (rc) {
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);
}
}
}
}
static bool pqi_is_supported_device(struct pqi_scsi_dev *device)
{
bool is_supported = false;
switch (device->devtype) {
case TYPE_DISK:
case TYPE_ZBC:
case TYPE_TAPE:
case TYPE_MEDIUM_CHANGER:
case TYPE_ENCLOSURE:
is_supported = true;
break;
case TYPE_RAID:
/*
* 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 (pqi_is_hba_lunid(device->scsi3addr))
is_supported = true;
break;
}
return is_supported;
}
static inline bool pqi_skip_device(u8 *scsi3addr)
{
/* Ignore all masked devices. */
if (MASKED_DEVICE(scsi3addr))
return true;
return false;
}
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_extended *physdev_list = NULL;
struct report_log_lun_extended *logdev_list = NULL;
struct report_phys_lun_extended_entry *phys_lun_ext_entry;
struct report_log_lun_extended_entry *log_lun_ext_entry;
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;
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;
}
}
num_new_devices = num_physicals + num_logicals;
new_device_list = kmalloc(sizeof(*new_device_list) *
num_new_devices, 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;
for (i = 0; i < num_new_devices; i++) {
if (i < num_physicals) {
is_physical_device = true;
phys_lun_ext_entry = &physdev_list->lun_entries[i];
log_lun_ext_entry = NULL;
scsi3addr = phys_lun_ext_entry->lunid;
} else {
is_physical_device = false;
phys_lun_ext_entry = NULL;
log_lun_ext_entry =
&logdev_list->lun_entries[i - num_physicals];
scsi3addr = log_lun_ext_entry->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->is_external_raid_device =
pqi_is_external_raid_addr(scsi3addr);
/* Gather information about the device. */
rc = pqi_get_device_info(ctrl_info, device);
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\n",
get_unaligned_be64(
&phys_lun_ext_entry->wwid));
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;
}
if (!pqi_is_supported_device(device))
continue;
pqi_assign_bus_target_lun(device);
if (device->is_physical_device) {
device->wwid = phys_lun_ext_entry->wwid;
if ((phys_lun_ext_entry->device_flags &
REPORT_PHYS_LUN_DEV_FLAG_AIO_ENABLED) &&
phys_lun_ext_entry->aio_handle)
device->aio_enabled = true;
} else {
memcpy(device->volume_id, log_lun_ext_entry->volume_id,
sizeof(device->volume_id));
}
switch (device->devtype) {
case TYPE_DISK:
case TYPE_ZBC:
case TYPE_ENCLOSURE:
if (device->is_physical_device) {
device->sas_address =
get_unaligned_be64(&device->wwid);
if (device->devtype == TYPE_DISK ||
device->devtype == TYPE_ZBC) {
device->aio_handle =
phys_lun_ext_entry->aio_handle;
pqi_get_physical_disk_info(ctrl_info,
device, id_phys);
}
}
break;
}
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 void pqi_remove_all_scsi_devices(struct pqi_ctrl_info *ctrl_info)
{
unsigned long flags;
struct pqi_scsi_dev *device;
while (1) {
spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
device = list_first_entry_or_null(&ctrl_info->scsi_device_list,
struct pqi_scsi_dev, scsi_device_list_entry);
if (device)
list_del(&device->scsi_device_list_entry);
spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
flags);
if (!device)
break;
if (device->sdev)
pqi_remove_device(ctrl_info, device);
pqi_free_device(device);
}
}
static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
{
int rc;
if (pqi_ctrl_offline(ctrl_info))
return -ENXIO;
mutex_lock(&ctrl_info->scan_mutex);
rc = pqi_update_scsi_devices(ctrl_info);
if (rc)
pqi_schedule_rescan_worker_delayed(ctrl_info);
mutex_unlock(&ctrl_info->scan_mutex);
return rc;
}
static void pqi_scan_start(struct Scsi_Host *shost)
{
pqi_scan_scsi_devices(shost_to_hba(shost));
}
/* 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 void pqi_wait_until_scan_finished(struct pqi_ctrl_info *ctrl_info)
{
mutex_lock(&ctrl_info->scan_mutex);
mutex_unlock(&ctrl_info->scan_mutex);
}
static void pqi_wait_until_lun_reset_finished(struct pqi_ctrl_info *ctrl_info)
{
mutex_lock(&ctrl_info->lun_reset_mutex);
mutex_unlock(&ctrl_info->lun_reset_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.
*/
#define PQI_RAID_BYPASS_INELIGIBLE 1
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)
{
struct raid_map *raid_map;
bool is_write = false;
u32 map_index;
u64 first_block;
u64 last_block;
u32 block_cnt;
u32 blocks_per_row;
u64 first_row;
u64 last_row;
u32 first_row_offset;
u32 last_row_offset;
u32 first_column;
u32 last_column;
u64 r0_first_row;
u64 r0_last_row;
u32 r5or6_blocks_per_row;
u64 r5or6_first_row;
u64 r5or6_last_row;
u32 r5or6_first_row_offset;
u32 r5or6_last_row_offset;
u32 r5or6_first_column;
u32 r5or6_last_column;
u16 data_disks_per_row;
u32 total_disks_per_row;
u16 layout_map_count;
u32 stripesize;
u16 strip_size;
u32 first_group;
u32 last_group;
u32 current_group;
u32 map_row;
u32 aio_handle;
u64 disk_block;
u32 disk_block_cnt;
u8 cdb[16];
u8 cdb_length;
int offload_to_mirror;
struct pqi_encryption_info *encryption_info_ptr;
struct pqi_encryption_info encryption_info;
#if BITS_PER_LONG == 32
u64 tmpdiv;
#endif
/* Check for valid opcode, get LBA and block count. */
switch (scmd->cmnd[0]) {
case WRITE_6:
is_write = true;
/* fall through */
case READ_6:
first_block = (u64)(((scmd->cmnd[1] & 0x1f) << 16) |
(scmd->cmnd[2] << 8) | scmd->cmnd[3]);
block_cnt = (u32)scmd->cmnd[4];
if (block_cnt == 0)
block_cnt = 256;
break;
case WRITE_10:
is_write = true;
/* fall through */
case READ_10:
first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]);
break;
case WRITE_12:
is_write = true;
/* fall through */
case READ_12:
first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
break;
case WRITE_16:
is_write = true;
/* fall through */
case READ_16:
first_block = get_unaligned_be64(&scmd->cmnd[2]);
block_cnt = get_unaligned_be32(&scmd->cmnd[10]);
break;
default:
/* Process via normal I/O path. */
return PQI_RAID_BYPASS_INELIGIBLE;
}
/* Check for write to non-RAID-0. */
if (is_write && device->raid_level != SA_RAID_0)
return PQI_RAID_BYPASS_INELIGIBLE;
if (unlikely(block_cnt == 0))
return PQI_RAID_BYPASS_INELIGIBLE;
last_block = first_block + block_cnt - 1;
raid_map = device->raid_map;
/* Check for invalid block or wraparound. */
if (last_block >= get_unaligned_le64(&raid_map->volume_blk_cnt) ||
last_block < first_block)
return PQI_RAID_BYPASS_INELIGIBLE;
data_disks_per_row = get_unaligned_le16(&raid_map->data_disks_per_row);
strip_size = get_unaligned_le16(&raid_map->strip_size);
layout_map_count = get_unaligned_le16(&raid_map->layout_map_count);
/* Calculate stripe information for the request. */
blocks_per_row = data_disks_per_row * strip_size;
#if BITS_PER_LONG == 32
tmpdiv = first_block;
do_div(tmpdiv, blocks_per_row);
first_row = tmpdiv;
tmpdiv = last_block;
do_div(tmpdiv, blocks_per_row);
last_row = tmpdiv;
first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
tmpdiv = first_row_offset;
do_div(tmpdiv, strip_size);
first_column = tmpdiv;
tmpdiv = last_row_offset;
do_div(tmpdiv, strip_size);
last_column = tmpdiv;
#else
first_row = first_block / blocks_per_row;
last_row = last_block / blocks_per_row;
first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
first_column = first_row_offset / strip_size;
last_column = last_row_offset / strip_size;
#endif
/* If this isn't a single row/column then give to the controller. */
if (first_row != last_row || first_column != last_column)
return PQI_RAID_BYPASS_INELIGIBLE;
/* Proceeding with driver mapping. */
total_disks_per_row = data_disks_per_row +
get_unaligned_le16(&raid_map->metadata_disks_per_row);
map_row = ((u32)(first_row >> raid_map->parity_rotation_shift)) %
get_unaligned_le16(&raid_map->row_cnt);
map_index = (map_row * total_disks_per_row) + first_column;
/* RAID 1 */
if (device->raid_level == SA_RAID_1) {
if (device->offload_to_mirror)
map_index += data_disks_per_row;
device->offload_to_mirror = !device->offload_to_mirror;
} else if (device->raid_level == SA_RAID_ADM) {
/* RAID ADM */
/*
* Handles N-way mirrors (R1-ADM) and R10 with # of drives
* divisible by 3.
*/
offload_to_mirror = device->offload_to_mirror;
if (offload_to_mirror == 0) {
/* use physical disk in the first mirrored group. */
map_index %= data_disks_per_row;
} else {
do {
/*
* Determine mirror group that map_index
* indicates.
*/
current_group = map_index / data_disks_per_row;
if (offload_to_mirror != current_group) {
if (current_group <
layout_map_count - 1) {
/*
* Select raid index from
* next group.
*/
map_index += data_disks_per_row;
current_group++;
} else {
/*
* Select raid index from first
* group.
*/
map_index %= data_disks_per_row;
current_group = 0;
}
}
} while (offload_to_mirror != current_group);
}
/* Set mirror group to use next time. */
offload_to_mirror =
(offload_to_mirror >= layout_map_count - 1) ?
0 : offload_to_mirror + 1;
WARN_ON(offload_to_mirror >= layout_map_count);
device->offload_to_mirror = offload_to_mirror;
/*
* Avoid direct use of device->offload_to_mirror within this
* function since multiple threads might simultaneously
* increment it beyond the range of device->layout_map_count -1.
*/
} else if ((device->raid_level == SA_RAID_5 ||
device->raid_level == SA_RAID_6) && layout_map_count > 1) {
/* RAID 50/60 */
/* Verify first and last block are in same RAID group */
r5or6_blocks_per_row = strip_size * data_disks_per_row;
stripesize = r5or6_blocks_per_row * layout_map_count;
#if BITS_PER_LONG == 32
tmpdiv = first_block;
first_group = do_div(tmpdiv, stripesize);
tmpdiv = first_group;
do_div(tmpdiv, r5or6_blocks_per_row);
first_group = tmpdiv;
tmpdiv = last_block;
last_group = do_div(tmpdiv, stripesize);
tmpdiv = last_group;
do_div(tmpdiv, r5or6_blocks_per_row);
last_group = tmpdiv;
#else
first_group = (first_block % stripesize) / r5or6_blocks_per_row;
last_group = (last_block % stripesize) / r5or6_blocks_per_row;
#endif
if (first_group != last_group)
return PQI_RAID_BYPASS_INELIGIBLE;
/* Verify request is in a single row of RAID 5/6 */
#if BITS_PER_LONG == 32
tmpdiv = first_block;
do_div(tmpdiv, stripesize);
first_row = r5or6_first_row = r0_first_row = tmpdiv;
tmpdiv = last_block;
do_div(tmpdiv, stripesize);
r5or6_last_row = r0_last_row = tmpdiv;
#else
first_row = r5or6_first_row = r0_first_row =
first_block / stripesize;
r5or6_last_row = r0_last_row = last_block / stripesize;
#endif
if (r5or6_first_row != r5or6_last_row)
return PQI_RAID_BYPASS_INELIGIBLE;
/* Verify request is in a single column */
#if BITS_PER_LONG == 32
tmpdiv = first_block;
first_row_offset = do_div(tmpdiv, stripesize);
tmpdiv = first_row_offset;
first_row_offset = (u32)do_div(tmpdiv, r5or6_blocks_per_row);
r5or6_first_row_offset = first_row_offset;
tmpdiv = last_block;
r5or6_last_row_offset = do_div(tmpdiv, stripesize);
tmpdiv = r5or6_last_row_offset;
r5or6_last_row_offset = do_div(tmpdiv, r5or6_blocks_per_row);
tmpdiv = r5or6_first_row_offset;
do_div(tmpdiv, strip_size);
first_column = r5or6_first_column = tmpdiv;
tmpdiv = r5or6_last_row_offset;
do_div(tmpdiv, strip_size);
r5or6_last_column = tmpdiv;
#else
first_row_offset = r5or6_first_row_offset =
(u32)((first_block % stripesize) %
r5or6_blocks_per_row);
r5or6_last_row_offset =
(u32)((last_block % stripesize) %
r5or6_blocks_per_row);
first_column = r5or6_first_row_offset / strip_size;
r5or6_first_column = first_column;
r5or6_last_column = r5or6_last_row_offset / strip_size;
#endif
if (r5or6_first_column != r5or6_last_column)
return PQI_RAID_BYPASS_INELIGIBLE;
/* Request is eligible */
map_row =
((u32)(first_row >> raid_map->parity_rotation_shift)) %
get_unaligned_le16(&raid_map->row_cnt);
map_index = (first_group *
(get_unaligned_le16(&raid_map->row_cnt) *
total_disks_per_row)) +
(map_row * total_disks_per_row) + first_column;
}
if (unlikely(map_index >= RAID_MAP_MAX_ENTRIES))
return PQI_RAID_BYPASS_INELIGIBLE;
aio_handle = raid_map->disk_data[map_index].aio_handle;
disk_block = get_unaligned_le64(&raid_map->disk_starting_blk) +
first_row * strip_size +
(first_row_offset - first_column * strip_size);
disk_block_cnt = block_cnt;
/* Handle differing logical/physical block sizes. */
if (raid_map->phys_blk_shift) {
disk_block <<= raid_map->phys_blk_shift;
disk_block_cnt <<= raid_map->phys_blk_shift;
}
if (unlikely(disk_block_cnt > 0xffff))
return PQI_RAID_BYPASS_INELIGIBLE;
/* Build the new CDB for the physical disk I/O. */
if (disk_block > 0xffffffff) {
cdb[0] = is_write ? WRITE_16 : READ_16;
cdb[1] = 0;
put_unaligned_be64(disk_block, &cdb[2]);
put_unaligned_be32(disk_block_cnt, &cdb[10]);
cdb[14] = 0;
cdb[15] = 0;
cdb_length = 16;
} else {
cdb[0] = is_write ? WRITE_10 : READ_10;
cdb[1] = 0;
put_unaligned_be32((u32)disk_block, &cdb[2]);
cdb[6] = 0;
put_unaligned_be16((u16)disk_block_cnt, &cdb[7]);
cdb[9] = 0;
cdb_length = 10;
}
if (get_unaligned_le16(&raid_map->flags) &
RAID_MAP_ENCRYPTION_ENABLED) {
pqi_set_encryption_info(&encryption_info, raid_map,
first_block);
encryption_info_ptr = &encryption_info;
} else {
encryption_info_ptr = NULL;
}
return pqi_aio_submit_io(ctrl_info, scmd, aio_handle,
cdb, cdb_length, queue_group, encryption_info_ptr, true);
}
#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;
scsi_device_set_state(sdev, SDEV_OFFLINE);
ctrl_info = shost_to_hba(sdev->host);
pqi_schedule_rescan_worker(ctrl_info);
dev_err(&ctrl_info->pci_dev->dev, "offlined %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 &&
sshdr.ascq == 0x1) {
pqi_take_device_offline(scmd->device, "RAID");
host_byte = DID_NO_CONNECT;
}
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;
scmd = io_request->scmd;
error_info = io_request->error_info;
host_byte = DID_OK;
sense_data_length = 0;
device_offline = false;
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);
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_buffer(0, scmd->sense_buffer, 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_task_management_response *response)
{
int rc;
switch (response->response_code) {
case SOP_TMF_COMPLETE:
case SOP_TMF_FUNCTION_SUCCEEDED:
rc = 0;
break;
default:
rc = -EIO;
break;
}
return rc;
}
static unsigned int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info,
struct pqi_queue_group *queue_group)
{
unsigned 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 = *queue_group->oq_pi;
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);
WARN_ON(request_id >= ctrl_info->max_io_slots);
io_request = &ctrl_info->io_request_pool[request_id];
WARN_ON(atomic_read(&io_request->refcount) == 0);
switch (response->header.iu_type) {
case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
break;
case PQI_RESPONSE_IU_TASK_MANAGEMENT:
io_request->status =
pqi_interpret_task_management_response(
(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:
dev_err(&ctrl_info->pci_dev->dev,
"unexpected IU type: 0x%x\n",
response->header.iu_type);
break;
}
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 = *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;
request.event_id = event->event_id;
request.additional_event_id = event->additional_event_id;
pqi_send_event_ack(ctrl_info, &request, sizeof(request));
}
static void pqi_event_worker(struct work_struct *work)
{
unsigned int i;
struct pqi_ctrl_info *ctrl_info;
struct pqi_event *event;
ctrl_info = container_of(work, struct pqi_ctrl_info, event_work);
pqi_ctrl_busy(ctrl_info);
pqi_wait_if_ctrl_blocked(ctrl_info, NO_TIMEOUT);
if (pqi_ctrl_offline(ctrl_info))
goto out;
pqi_schedule_rescan_worker_delayed(ctrl_info);
event = ctrl_info->events;
for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
if (event->pending) {
event->pending = false;
pqi_acknowledge_event(ctrl_info, event);
}
event++;
}
out:
pqi_ctrl_unbusy(ctrl_info);
}
#define PQI_HEARTBEAT_TIMER_INTERVAL (10 * HZ)
static void pqi_heartbeat_timer_handler(unsigned long data)
{
int num_interrupts;
u32 heartbeat_count;
struct pqi_ctrl_info *ctrl_info = (struct pqi_ctrl_info *)data;
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);
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;
ctrl_info->heartbeat_timer.data = (unsigned long)ctrl_info;
ctrl_info->heartbeat_timer.function = pqi_heartbeat_timer_handler;
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 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 unsigned int pqi_process_event_intr(struct pqi_ctrl_info *ctrl_info)
{
unsigned 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 = *event_queue->oq_pi;
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) {
if (response->request_acknowlege) {
event = &ctrl_info->events[event_index];
event->pending = true;
event->event_type = response->event_type;
event->event_id = response->event_id;
event->additional_event_id =
response->additional_event_id;
}
}
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;
unsigned int num_responses_handled;
queue_group = data;
ctrl_info = queue_group->ctrl_info;
if (!pqi_is_valid_irq(ctrl_info))
return IRQ_NONE;
num_responses_handled = pqi_process_io_intr(ctrl_info, queue_group);
if (irq == ctrl_info->event_irq)
num_responses_handled += pqi_process_event_intr(ctrl_info);
if (num_responses_handled)
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);
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;
num_vectors_enabled = pci_alloc_irq_vectors(ctrl_info->pci_dev,
PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups,
PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
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;