# smartpqi - Microchip Smart Storage SCSI driver - man(4) - [phpMan] [_smartpqi_(4)](https://www.chedong.com/phpMan.php/man/smartpqi/4/markdown) Kernel Interfaces Manual [_smartpqi_(4)](https://www.chedong.com/phpMan.php/man/smartpqi/4/markdown) ## 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)](https://www.chedong.com/phpMan.php/man/cciss/4/markdown) and [**hpsa**(4)](https://www.chedong.com/phpMan.php/man/hpsa/4/markdown) drivers, many, but not all of the [**ioctl**(2)](https://www.chedong.com/phpMan.php/man/ioctl/2/markdown) 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 (wildcards are en‐ abled). **disable_heartbeat=**{**0**|**1**} Disables support for the controller's heartbeat check. This parameter is used for de‐ bugging purposes. The default value is 0 (the controller's heartbeat check is en‐ abled). **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 de‐ fault 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. ### 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 volumes) and notify the SCSI mid-layer of any changes detected. Usually this action is triggered automatically by configura‐ tion 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 dri‐ ver 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 identi‐ fication 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: $ **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 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: $ **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 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: $ **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 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-en‐ abled volumes. (Ioaccel is an alternative driver submission path that allows the dri‐ ver 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 de‐ vice. 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 de‐ vice 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 pri‐ ority 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 con‐ troller, which can be found by searching for the specific controller at ‐ crochip.com/design-centers/storage. ## 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)](https://www.chedong.com/phpMan.php/man/cciss/4/markdown), [**hpsa**(4)](https://www.chedong.com/phpMan.php/man/hpsa/4/markdown), [**sd**(4)](https://www.chedong.com/phpMan.php/man/sd/4/markdown), [**st**(4)](https://www.chedong.com/phpMan.php/man/st/4/markdown), [**sg**(4)](https://www.chedong.com/phpMan.php/man/sg/4/markdown) _Documentation/ABI/testing/sysfs-bus-pci-devices-cciss_ in the Linux kernel source tree. Linux man-pages 6.7 2023-10-31 [_smartpqi_(4)](https://www.chedong.com/phpMan.php/man/smartpqi/4/markdown)