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NAME

       smartpqi - Microsemi Smart Family SCSI driver

SYNOPSIS

       modprobe smartpqi [disable_device_id_wildcards={0|1}] [disable_heartbeat={0|1}]
                         [disable_ctrl_shutdown={0|1}] [lockup_action={none|reboot|panic}]

DESCRIPTION

       smartpqi is a SCSI driver for Microsemi Smart Family controllers.

   Supported ioctl() 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_DEREGDISK, CCISS_REGNEWDISK, CCISS_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.

   Boot options
       disable_device_id_wildcards={0|1}
              Disables support for device ID wildcards.  The default value is 0.

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

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

       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

FILES

   Device nodes
       Logical 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-specific host attribute files in /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 drives) 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 drives.

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

              For example:

                  $ cat /sys/class/scsi_host/host1/version
                  driver: 1.1.2-126
                  firmware: 1.29-112

       /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.

   SmartPQI-specific disk attribute files in /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
              each logical drive.

              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 unique
              identifier of the disk.

              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

VERSIONS

       The smarpqi driver was added in Linux 4.9.

NOTES

   Configuration
       To  configure  a  Microsemi  Smart  Family  controller,  refer  to  the User Guide for the
       controller,  which  can  be  found  by  searching   for   the   specific   controller   at
       ⟨https://storage.microsemi.com/⟩.

SEE ALSO

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

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

COLOPHON

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