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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/scsi/smartpqi.rst | |
parent | Initial commit. (diff) | |
download | linux-upstream/5.10.209.tar.xz linux-upstream/5.10.209.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/scsi/smartpqi.rst')
-rw-r--r-- | Documentation/scsi/smartpqi.rst | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/Documentation/scsi/smartpqi.rst b/Documentation/scsi/smartpqi.rst new file mode 100644 index 000000000..e574a1ccf --- /dev/null +++ b/Documentation/scsi/smartpqi.rst @@ -0,0 +1,78 @@ +.. 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. |