SMARTPQI(4) Linux Programmer's Manual SMARTPQI(4)NAMEsmartpqi - 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}]
DESCRIPTIONsmartpqi 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 con‐
troller.
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 con‐
figured or deleted logical drives) and notify the SCSI mid-layer
of any changes detected. Usually this action is triggered auto‐
matically by configuration changes, so the user should not nor‐
mally 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 appro‐
priate 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 alter‐
native driver submission path that allows the driver to send I/O
requests directly to backend SCSI devices, bypassing the con‐
troller firmware. This results in an increase in performance.
This method is used for HBA disks and for logical volumes com‐
prised of SSDs.) Contains 1 if ioaccel is enabled for the vol‐
ume 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 spe‐
cific controller at ⟨https://storage.microsemi.com/⟩.
SEE ALSOcciss(4), hpsa(4), sd(4), st(4)
Documentation/ABI/testing/sysfs-bus-pci-devices-cciss in the Linux ker‐
nel source tree.
COLOPHON
This page is part of release 4.14 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
Linux 2017-10-19 SMARTPQI(4)
