smartpqi
Section: Devices and Network Interfaces (4)
Updated: 202-0-08
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NAME
smartpqi - Microchip Smart Storage SCSI driver
SYNOPSIS
[
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 BI]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 r-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 (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.
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.
SmartPQ-specific host attribute files in BI]/sys]
- /sys/class/scsi_host/host*/rescan
-
The host
rescan
attribute is a writ-only attribute.
Writing to this attribute will cause the driver to scan for new,
changed, or removed devices (e.g., ho-plugged tape drives, or newly
configured or deleted logical volumes) and notify the SCSI mi-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 ho-plugging devices such as tape drives or
entire storage boxes containing pr-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 rea-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 rea-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 rea-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 rea-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 rea-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 rea-write.
This attribute enables/disables stream detection in the driver.
Enabling stream detection can improve sequential write performance
for ioacce-enabled volumes.
See the
ssd_smart_path_enabled
disk attribute section for details on ioacce-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 rea-write.
This attribute enables/disables RAID 5 write operations
for ioacce-enabled volumes.
Enabling can improve sequential write performance.
See the
ssd_smart_path_enabled
disk attribute section for details on ioacce-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 rea-write.
This attribute enables/disables RAID 6 write operations
for ioacce-enabled volumes.
Enabling can improve sequential write performance.
See the
ssd_smart_path_enabled
disk attribute section for details on ioacce-enabled volumes.
The default value is 1 (RAID 6 writes enabled).
-
Enable example:
-
$ echo 1 > /sys/class/scsi_host/host1/enable_r6_writes
SmartPQ-specific disk attribute files in BI]/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 rea-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 rea-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 rea-only.
This attribute is for ioacce-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 rea-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 rea-only.
This attribute contains a 1-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 rea-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] Direc-Access Active
$ cat /sys/class/scsi_disk/12:0:9:0/device/path_info
[12:0:9:0] Direc-Access PORT: C1 BOX: 1 BAY: 14 Inactive
[12:0:9:0] Direc-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 rea-only.
This attribute contains the number of I/O requests
that have gone through the ioaccel path
for ioacce-enabled volumes.
See the
ssd_smart_path_enabled
disk attribute section for details on ioacce-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:
-
$ 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 specific controller at
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 kernel source tree.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- Supported BI]ioctl]() operations
-
- Boot options
-
- FILES
-
- Device nodes
-
- SmartPQI-specific host attribute files in BI]/sys]
-
- SmartPQI-specific disk attribute files in BI]/sys]
-
- VERSIONS
-
- NOTES
-
- Configuration
-
- HISTORY
-
- SEE ALSO
-
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- Running on 
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