[PATCH v9 3/4] drm/xe: Use device wedged event

[Raag Jadav]

On Tue, Nov 19, 2024 at 10:25:10AM +0530, Ghimiray, Himal Prasad wrote:
> On 15-11-2024 10:37, Raag Jadav wrote:
> > This was previously attempted as xe specific reset uevent but dropped
> > in commit 77a0d4d1cea2 ("drm/xe/uapi: Remove reset uevent for now")
> > as part of refactoring.
> > 
> > Now that we have device wedged event provided by DRM core, make use
> > of it and support both driver rebind and bus-reset based recovery.
> > With this in place userspace will be notified of wedged device, on
> > the basis of which, userspace may take respective action to recover
> > the device.
> > 
> > $ udevadm monitor --property --kernel
> > monitor will print the received events for:
> > KERNEL - the kernel uevent
> > 
> > KERNEL[265.802982] change   /devices/pci0000:00/0000:00:01.0/0000:01:00.0/0000:02:01.0/0000:03:00.0/drm/card0 (drm)
> > ACTION=change
> > DEVPATH=/devices/pci0000:00/0000:00:01.0/0000:01:00.0/0000:02:01.0/0000:03:00.0/drm/card0
> > SUBSYSTEM=drm
> > WEDGED=rebind,bus-reset
> > DEVNAME=/dev/dri/card0
> > DEVTYPE=drm_minor
> > SEQNUM=5208
> > MAJOR=226
> > MINOR=0
> 
> 
> The patch in itself looks good. Do we have IGT tests in place to validate
> this uevent ?

I unit tested it with documented example which seems to work. We can have an
igt in place once we have acceptance from the community.

Raag