fwupd/plugins/scsi/README.md
Richard Hughes 7d89e85de5 scsi: Support updating firmware on UFS devices
Change-Id: I5573b1890135d1fd3b2f0cb8f95f74cbb3e21abe
2022-05-10 08:20:06 +01:00

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# SCSI
## Introduction
This plugin adds support for SCSI storage hardware. Most SCSI devices are enumerated and some UFS
devices may also be updatable.
Firmware is sent in 4kB chunks and activated on next reboot only.
## Firmware Format
The daemon will decompress the cabinet archive and extract a firmware blob in
an unspecified binary file format.
This plugin supports the following protocol ID:
* org.jedec.ufs
## GUID Generation
These device use the SCSI DeviceInstanceId values, e.g.
* `SCSI\VEN_HP&DEV_EG0900JETKB&REV_HPD4`
* `SCSI\VEN_HP&DEV_EG0900JETKB`
* `SCSI\VEN_HP`
## Vendor ID Security
The vendor ID is set from the vendor, for example set to `SCSI:HP`
## External Interface Access
This plugin requires only reading from sysfs for enumeration, but requires using a `sg_io ioctl`
for UFS updates.