1.. SPDX-License-Identifier: GPL-2.0 2 3============================================== 4SMARTPQI - Microchip Smart Storage SCSI driver 5============================================== 6 7This file describes the smartpqi SCSI driver for Microchip 8(http://www.microchip.com) PQI controllers. The smartpqi driver 9is the next generation SCSI driver for Microchip Corp. The smartpqi 10driver is the first SCSI driver to implement the PQI queuing model. 11 12The smartpqi driver will replace the aacraid driver for Adaptec Series 9 13controllers. Customers running an older kernel (Pre-4.9) using an Adaptec 14Series 9 controller will have to configure the smartpqi driver or their 15volumes will not be added to the OS. 16 17For Microchip smartpqi controller support, enable the smartpqi driver 18when configuring the kernel. 19 20For more information on the PQI Queuing Interface, please see: 21 22- http://www.t10.org/drafts.htm 23- http://www.t10.org/members/w_pqi2.htm 24 25Supported devices 26================= 27<Controller names to be added as they become publicly available.> 28 29smartpqi specific entries in /sys 30================================= 31 32smartpqi host attributes 33------------------------ 34 - /sys/class/scsi_host/host*/rescan 35 - /sys/class/scsi_host/host*/driver_version 36 37 The host rescan attribute is a write only attribute. Writing to this 38 attribute will trigger the driver to scan for new, changed, or removed 39 devices and notify the SCSI mid-layer of any changes detected. 40 41 The version attribute is read-only and will return the driver version 42 and the controller firmware version. 43 For example:: 44 45 driver: 0.9.13-370 46 firmware: 0.01-522 47 48smartpqi sas device attributes 49------------------------------ 50 HBA devices are added to the SAS transport layer. These attributes are 51 automatically added by the SAS transport layer. 52 53 /sys/class/sas_device/end_device-X:X/sas_address 54 /sys/class/sas_device/end_device-X:X/enclosure_identifier 55 /sys/class/sas_device/end_device-X:X/scsi_target_id 56 57smartpqi specific ioctls 58======================== 59 60 For compatibility with applications written for the cciss protocol. 61 62 CCISS_DEREGDISK, CCISS_REGNEWDISK, CCISS_REGNEWD 63 The above three ioctls all do exactly the same thing, which is to cause the driver 64 to rescan for new devices. This does exactly the same thing as writing to the 65 smartpqi specific host "rescan" attribute. 66 67 CCISS_GETPCIINFO 68 Returns PCI domain, bus, device and function and "board ID" (PCI subsystem ID). 69 70 CCISS_GETDRIVVER 71 Returns driver version in three bytes encoded as:: 72 73 (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) | (DRIVER_RELEASE << 16) | DRIVER_REVISION; 74 75 CCISS_PASSTHRU 76 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 storage 78 agents, etc. 79