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1.. SPDX-License-Identifier: GPL-2.02 3==============================================4SMARTPQI - Microchip Smart Storage SCSI driver5==============================================6 7This file describes the smartpqi SCSI driver for Microchip8(http://www.microchip.com) PQI controllers. The smartpqi driver9is the next generation SCSI driver for Microchip Corp. The smartpqi10driver is the first SCSI driver to implement the PQI queuing model.11 12The smartpqi driver will replace the aacraid driver for Adaptec Series 913controllers. Customers running an older kernel (Pre-4.9) using an Adaptec14Series 9 controller will have to configure the smartpqi driver or their15volumes will not be added to the OS.16 17For Microchip smartpqi controller support, enable the smartpqi driver18when configuring the kernel.19 20For more information on the PQI Queuing Interface, please see:21 22- http://www.t10.org/drafts.htm23- http://www.t10.org/members/w_pqi2.htm24 25Supported devices26=================27<Controller names to be added as they become publicly available.>28 29smartpqi specific entries in /sys30=================================31 32smartpqi host attributes33------------------------34 - /sys/class/scsi_host/host*/rescan35 - /sys/class/scsi_host/host*/driver_version36 37 The host rescan attribute is a write only attribute. Writing to this38 attribute will trigger the driver to scan for new, changed, or removed39 devices and notify the SCSI mid-layer of any changes detected.40 41 The version attribute is read-only and will return the driver version42 and the controller firmware version.43 For example::44 45 driver: 0.9.13-37046 firmware: 0.01-52247 48smartpqi sas device attributes49------------------------------50 HBA devices are added to the SAS transport layer. These attributes are51 automatically added by the SAS transport layer.52 53 /sys/class/sas_device/end_device-X:X/sas_address54 /sys/class/sas_device/end_device-X:X/enclosure_identifier55 /sys/class/sas_device/end_device-X:X/scsi_target_id56 57smartpqi specific ioctls58========================59 60 For compatibility with applications written for the cciss protocol.61 62 CCISS_DEREGDISK, CCISS_REGNEWDISK, CCISS_REGNEWD63 The above three ioctls all do exactly the same thing, which is to cause the driver64 to rescan for new devices. This does exactly the same thing as writing to the65 smartpqi specific host "rescan" attribute.66 67 CCISS_GETPCIINFO68 Returns PCI domain, bus, device and function and "board ID" (PCI subsystem ID).69 70 CCISS_GETDRIVVER71 Returns driver version in three bytes encoded as::72 73 (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) | (DRIVER_RELEASE << 16) | DRIVER_REVISION;74 75 CCISS_PASSTHRU76 Allows "BMIC" and "CISS" commands to be passed through to the Smart Storage Array.77 These are used extensively by the SSA Array Configuration Utility, SNMP storage78 agents, etc.79