On Thu, Jul 24, 2025 at 08:04:35PM +0530, Riana Tauro wrote: > Add documentation for vendor specific device wedged recovery method > and runtime survivability.
... > /** > + * DOC: Xe Device Wedging > + * > + * Xe driver uses drm device wedged uevent as documented in > Documentation/gpu/drm-uapi.rst. > + * > + * When device is in wedged state, every IOCTL will be blocked and GT cannot > be > + * used. Certain critical errors like gt reset failure, firmware failures > can cause > + * the device to be wedged. The default recovery method for a wedged state > + * is rebind/bus-reset. > + * > + * Another recovery method is vendor-specific. Below are the usecases that > trigger > + * vendor-specific drm device wedged uevent and the procedure to be performed > + * to recover the device. > + * > + * Case 1: CSC firmware errors require a firmware flash to restore normal > device > + * operation. Since firmware flash is a vendor-specific action > + * ``WEDGED=vendor-specific`` recovery method along with > + * :ref:`runtime survivability mode <xe-survivability-mode>` is used > to > + * notify userspace. User can then initiate a firmware flash using > userspace tools > + * like fwupd to restore device to normal situation. s/situation/operation Reviewed-by: Raag Jadav <raag.ja...@intel.com>
