5f59128c83
Change Microsemi references to Microchip. Link: https://lore.kernel.org/r/159864895592.13630.18113151805817361168.stgit@brunhilda Reviewed-by: Scott Teel <scott.teel@microsemi.com> Reviewed-by: Scott Benesh <scott.benesh@microsemi.com> Signed-off-by: Don Brace <don.brace@microsemi.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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2.8 KiB
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79 lines
2.8 KiB
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.. SPDX-License-Identifier: GPL-2.0
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==============================================
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SMARTPQI - Microchip Smart Storage SCSI driver
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==============================================
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This file describes the smartpqi SCSI driver for Microchip
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(http://www.microchip.com) PQI controllers. The smartpqi driver
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is the next generation SCSI driver for Microchip Corp. The smartpqi
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driver is the first SCSI driver to implement the PQI queuing model.
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The smartpqi driver will replace the aacraid driver for Adaptec Series 9
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controllers. Customers running an older kernel (Pre-4.9) using an Adaptec
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Series 9 controller will have to configure the smartpqi driver or their
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volumes will not be added to the OS.
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For Microchip smartpqi controller support, enable the smartpqi driver
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when configuring the kernel.
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For more information on the PQI Queuing Interface, please see:
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- http://www.t10.org/drafts.htm
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- http://www.t10.org/members/w_pqi2.htm
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Supported devices
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=================
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<Controller names to be added as they become publicly available.>
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smartpqi specific entries in /sys
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=================================
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smartpqi host attributes
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------------------------
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- /sys/class/scsi_host/host*/rescan
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- /sys/class/scsi_host/host*/driver_version
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The host rescan attribute is a write only attribute. Writing to this
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attribute will trigger the driver to scan for new, changed, or removed
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devices and notify the SCSI mid-layer of any changes detected.
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The version attribute is read-only and will return the driver version
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and the controller firmware version.
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For example::
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driver: 0.9.13-370
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firmware: 0.01-522
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smartpqi sas device attributes
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------------------------------
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HBA devices are added to the SAS transport layer. These attributes are
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automatically added by the SAS transport layer.
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/sys/class/sas_device/end_device-X:X/sas_address
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/sys/class/sas_device/end_device-X:X/enclosure_identifier
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/sys/class/sas_device/end_device-X:X/scsi_target_id
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smartpqi specific ioctls
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========================
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For compatibility with applications written for the cciss protocol.
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CCISS_DEREGDISK, CCISS_REGNEWDISK, CCISS_REGNEWD
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The above three ioctls all do exactly the same thing, which is to cause the driver
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to rescan for new devices. This does exactly the same thing as writing to the
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smartpqi specific host "rescan" attribute.
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CCISS_GETPCIINFO
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Returns PCI domain, bus, device and function and "board ID" (PCI subsystem ID).
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CCISS_GETDRIVVER
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Returns driver version in three bytes encoded as::
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(DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) | (DRIVER_RELEASE << 16) | DRIVER_REVISION;
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CCISS_PASSTHRU
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Allows "BMIC" and "CISS" commands to be passed through to the Smart Storage Array.
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These are used extensively by the SSA Array Configuration Utility, SNMP storage
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agents, etc.
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