smartpqi - Microchip Smart Storage SCSI driver

smartpqi is a SCSI driver for Microchip Smart Storage controllers.

   Supportedioctl()operations
       For  compatibility  with  applications written for the cciss(4) and hpsa(4) drivers, many, but not all of
       the ioctl(2) operations supported by the hpsa driver are also supported by the smartpqi driver.  The data
       structures   used   by   these   operations   are   described   in   the   Linux   kernel   source   file
       include/linux/cciss_ioctl.h.

       CCISS_DEREGDISKCCISS_REGNEWDISKCCISS_REGNEWD
              These  operations  all  do exactly the same thing, which is to cause the driver to re-scan for new
              devices.  This does exactly the same  thing  as  writing  to  the  smartpqi-specific  host  rescan
              attribute.

       CCISS_GETPCIINFO
              This  operation  returns  the  PCI domain, bus, device, and function and "board ID" (PCI subsystem
              ID).

       CCISS_GETDRIVVER
              This operation returns the driver version in four bytes, encoded as:

                  (major_version << 28) | (minor_version << 24) |
                          (release << 16) | revision

       CCISS_PASSTHRU
              Allows BMIC and CISS commands to be passed through to the controller.

   Bootoptionsdisable_device_id_wildcards={0|1}
              Disables support for device ID wildcards.  The default value is 0 (wildcards are enabled).

       disable_heartbeat={0|1}
              Disables support for the controller's heartbeat check.   This  parameter  is  used  for  debugging
              purposes.  The default value is 0 (the controller's heartbeat check is enabled).

       disable_ctrl_shutdown={0|1}
              Disables  support  for  shutting  down  the  controller  in the event of a controller lockup.  The
              default value is 0 (controller will be shut down).

       lockup_action={none|reboot|panic}
              Specifies the action the driver takes when a controller lockup is detected.  The default action is
              none.
              parameter   action
              ─────────────────────────────────────────────
              none        take controller offline only
              reboot      reboot the system
              panic       panic the system

       expose_ld_first={0|1}
              This option exposes logical devices to the OS before physical devices.  The  default  value  is  0
              (physical devices exposed first).

       hide_vsep={0|1}
              This  option  disables exposure of the virtual SEP to the OS.  The default value is 0 (virtual SEP
              is exposed).

       disable_managed_interrupts={0|1}
              Disables driver utilization of Linux kernel  managed  interrupts  for  controllers.   The  managed
              interrupts  feature  automatically  distributes  interrupts  to all available CPUs and assigns SMP
              affinity.  The default value is 0 (managed interrupts enabled).

       ctrl_ready_timeout={0|[30,1800]}
              This option specifies the timeout in seconds for the driver to  wait  for  the  controller  to  be
              ready.   The  valid  range is 0 or [30, 1800].  The default value is 0, which causes the driver to
              use a timeout of 180 seconds.

Devicenodes
       Disk drives are accessed via the SCSI disk driver (sd), tape drives via the SCSI tape  driver  (st),  and
       the  RAID  controller  via  the SCSI generic driver (sg), with device nodes named /dev/sd*, /dev/st*, and
       /dev/sg*, respectively.

   SmartPQI-specifichostattributefilesin/sys/sys/class/scsi_host/host*/rescan
              The host rescan attribute is a write-only attribute.  Writing to this  attribute  will  cause  the
              driver  to  scan  for  new,  changed,  or removed devices (e.g., hot-plugged tape drives, or newly
              configured or deleted logical volumes) and notify the SCSI  mid-layer  of  any  changes  detected.
              Usually  this  action  is triggered automatically by configuration changes, so the user should not
              normally have to write to this file.  Doing so may be useful when  hot-plugging  devices  such  as
              tape drives or entire storage boxes containing pre-configured logical volumes.

       /sys/class/scsi_host/host*/lockup_action
              The  host lockup_action attribute is a read/write attribute.  This attribute will cause the driver
              to perform a specific action in the unlikely event that a controller  lockup  has  been  detected.
              See OPTIONS above for an explanation of the lockup_action values.

       /sys/class/scsi_host/host*/driver_version
              The driver_version attribute is read-only.  This attribute contains the smartpqi driver version.

              For example:

                  $ cat/sys/class/scsi_host/host1/driver_version
                  1.1.2-126

       /sys/class/scsi_host/host*/firmware_version
              The  firmware_version  attribute  is  read-only.   This attribute contains the controller firmware
              version.

              For example:

                  $ cat/sys/class/scsi_host/host1/firmware_version
                  1.29-112

       /sys/class/scsi_host/host*/model
              The model attribute is read-only.  This attribute contains the product  identification  string  of
              the controller.

              For example:

                  $ cat/sys/class/scsi_host/host1/model
                  1100-16i

       /sys/class/scsi_host/host*/serial_number
              The  serial_number  attribute  is  read-only.   This  attribute contains the unique identification
              number of the controller.

              For example:

                  $ cat/sys/class/scsi_host/host1/serial_number
                  6A316373777

       /sys/class/scsi_host/host*/vendor
              The vendor attribute is read-only.  This attribute contains the vendor  identification  string  of
              the controller.

              For example:

                  $ cat/sys/class/scsi_host/host1/vendor
                  Adaptec

       /sys/class/scsi_host/host*/enable_stream_detection
              The  enable_stream_detection  attribute  is  read-write.   This  attribute enables/disables stream
              detection in the driver.  Enabling stream detection can improve sequential write  performance  for
              ioaccel-enabled  volumes.   See  the  ssd_smart_path_enabled disk attribute section for details on
              ioaccel-enabled volumes.  The default value is 1 (stream detection enabled).

              Enable example:

                  $ echo1>/sys/class/scsi_host/host1/enable_stream_detection/sys/class/scsi_host/host*/enable_r5_writes
              The enable_r5_writes attribute is  read-write.   This  attribute  enables/disables  RAID  5  write
              operations  for  ioaccel-enabled volumes.  Enabling can improve sequential write performance.  See
              the ssd_smart_path_enabled disk attribute section for details  on  ioaccel-enabled  volumes.   The
              default value is 1 (RAID 5 writes enabled).

              Enable example:

                  $ echo1>/sys/class/scsi_host/host1/enable_r5_writes/sys/class/scsi_host/host*/enable_r6_writes
              The  enable_r6_writes  attribute  is  read-write.   This  attribute  enables/disables RAID 6 write
              operations for ioaccel-enabled volumes.  Enabling can improve sequential write  performance.   See
              the  ssd_smart_path_enabled  disk  attribute  section for details on ioaccel-enabled volumes.  The
              default value is 1 (RAID 6 writes enabled).

              Enable example:

                  $ echo1>/sys/class/scsi_host/host1/enable_r6_writesSmartPQI-specificdiskattributefilesin/sys
       In the file specifications below, c stands for the number of the appropriate SCSI controller,  b  is  the
       bus number, t the target number, and l is the logical unit number (LUN).

       /sys/class/scsi_disk/c:b:t:l/device/raid_level
              The  raid_level  attribute  is  read-only.   This attribute contains the RAID level of the logical
              volume.

              For example:

                  $ cat/sys/class/scsi_disk/4:0:0:0/device/raid_level
                  RAID 0

       /sys/class/scsi_disk/c:b:t:l/device/sas_address
              The sas_address attribute is read-only.  This attribute contains the SAS address of the device.

              For example:

                  $ cat/sys/class/scsi_disk/1:0:3:0/device/sas_address
                  0x5001173d028543a2

       /sys/class/scsi_disk/c:b:t:l/device/ssd_smart_path_enabled
              The ssd_smart_path_enabled attribute is read-only.  This attribute is for ioaccel-enabled volumes.
              (Ioaccel is an alternative driver submission path that allows the  driver  to  send  I/O  requests
              directly  to backend SCSI devices, bypassing the controller firmware.  This results in an increase
              in performance.  This method is used for HBA disks and for logical  volumes  comprised  of  SSDs.)
              Contains 1 if ioaccel is enabled for the volume and 0 otherwise.

              For example:

                  $ cat/sys/class/scsi_disk/1:0:3:0/device/ssd_smart_path_enabled
                  0

       /sys/class/scsi_disk/c:b:t:l/device/lunid
              The lunid attribute is read-only.  This attribute contains the SCSI LUN ID for the device.

              For example:

                  $ cat/sys/class/scsi_disk/13:1:0:3/device/lunid
                  0x0300004000000000

       /sys/class/scsi_disk/c:b:t:l/device/unique_id
              The  unique_id  attribute  is  read-only.   This  attribute  contains  a  16-byte ID that uniquely
              identifies the device within the controller.

              For example:

                  $ cat/sys/class/scsi_disk/13:1:0:3/device/unique_id
                  600508B1001C6D4723A8E98D704FDB94

       /sys/class/scsi_disk/c:b:t:l/device/path_info
              The path_info attribute is read-only.  This attribute contains the c:b:t:l  of  the  device  along
              with  the  device  type  and  whether  the  device is Active or Inactive.  If the device is an HBA
              device, path_info will also display the PORT, BOX, and BAY the device is plugged into.

              For example:

                  $ cat/sys/class/scsi_disk/13:1:0:3/device/path_info
                  [13:1:0:3]    Direct-Access     Active

                  $ cat/sys/class/scsi_disk/12:0:9:0/device/path_info
                  [12:0:9:0]  Direct-Access   PORT: C1 BOX: 1 BAY: 14 Inactive
                  [12:0:9:0]  Direct-Access   PORT: C0 BOX: 1 BAY: 14 Active

       /sys/class/scsi_disk/c:b:t:l/device/raid_bypass_cnt
              The raid_bypass_cnt attribute is read-only.  This attribute contains the number  of  I/O  requests
              that   have   gone   through   the   ioaccel   path   for   ioaccel-enabled   volumes.    See  the
              ssd_smart_path_enabled disk attribute section for details on ioaccel-enabled volumes.

              For example:

                  $ cat/sys/class/scsi_disk/13:1:0:3/device/raid_bypass_cnt
                  0x300

       /sys/class/scsi_disk/c:b:t:l/device/sas_ncq_prio_enable
              The sas_ncq_prio_enable attribute  is  read/write.   This  attribute  enables  SATA  NCQ  priority
              support.  This attribute works only when device has NCQ support and controller firmware can handle
              IO with NCQ priority attribute.

              For example:

                  $ echo1>/sys/class/scsi_disk/13:1:0:3/device/sas_ncq_prio_enable

/sys/class/scsi_host/host*/version was replaced by two sysfs entries:

              /sys/class/scsi_host/host*/driver_version/sys/class/scsi_host/host*/firmware_version

       smartpqi - Microchip Smart Storage SCSI driver

Configuration
       To  configure a Microchip Smart Storage controller, refer to the User Guide for the controller, which can
       be found by searching for the specific controller at https://www.microchip.com/design-centers/storage.

cciss(4), hpsa(4), sd(4), st(4), sg(4)

       Documentation/ABI/testing/sysfs-bus-pci-devices-cciss in the Linux kernel source tree.

Linux man-pages 6.9.1                              2024-05-02                                        smartpqi(4)

modprobesmartpqi [disable_device_id_wildcards={0|1}] [disable_heartbeat={0|1}]
                         [disable_ctrl_shutdown={0|1}] [lockup_action={none|reboot|panic}]
                         [expose_ld_first={0|1}] [hide_vsep={0|1}] [disable_managed_interrupts={0|1}]
                         [ctrl_ready_timeout={0|[30,1800]}]

       The smartpqi driver was added in Linux 4.9.