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