smartpqi(4) Kernel Interfaces Manual smartpqi(4)
NAME
smartpqi - Microchip Smart Storage 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}]
[expose_ld_first={0|1}] [hide_vsep={0|1}]
[disable_managed_interrupts={0|1}]
[ctrl_ready_timeout={0|[30,1800]}]
DESCRIPTION
smartpqi is a SCSI driver for Microchip Smart Storage 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 struc-
tures 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 at-
tribute.
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
(wildcards are enabled).
disable_heartbeat={0|1}
Disables support for the controller's heartbeat check. This pa-
rameter 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 de-
vices. 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.
FILES
Device nodes
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-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 config-
ured or deleted logical volumes) and notify the SCSI mid-layer of
any changes detected. Usually this action is triggered automati-
cally 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 con-
taining 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 con-
tains 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 con-
tains 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 con-
tains 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 at-
tribute enables/disables stream detection in the driver. En-
abling 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:
$ echo 1 > /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 en-
ables/disables RAID 5 write operations for ioaccel-enabled vol-
umes. 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:
$ echo 1 > /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 en-
ables/disables RAID 6 write operations for ioaccel-enabled vol-
umes. 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:
$ echo 1 > /sys/class/scsi_host/host1/enable_r6_writes
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 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 at-
tribute is for ioaccel-enabled volumes. (Ioaccel is an alterna-
tive 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 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 con-
troller.
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 de-
vice, path_info will also display the PORT, BOX, and BAY the de-
vice 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 con-
tains the number of I/O requests that have gone through the ioac-
cel path for ioaccel-enabled volumes. See the ssd_smart_path_en-
abled disk attribute section for details on ioaccel-enabled vol-
umes.
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:
$ echo 1 > /sys/class/scsi_disk/13:1:0:3/device/sas_ncq_prio_enable
VERSIONS
The smartpqi driver was added in Linux 4.9.
NOTES
Configuration
To configure a Microchip Smart Storage controller, refer to the User
Guide for the controller, which can be found by searching for the spe-
cific controller at ]8;;https://www.microchip.com/design-centers/storage\https://www.microchip.com/design-centers/storage]8;;\.
HISTORY
/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
SEE ALSO
cciss(4), hpsa(4), sd(4), st(4), sg(4)
Documentation/ABI/testing/sysfs-bus-pci-devices-cciss in the Linux ker-
nel source tree.
Linux man-pages 6.9.1 2024-05-02 smartpqi(4)
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