This patchset adds a udev event for DRM device's resets. Userspace apps can trigger GPU resets by misuse of graphical APIs or driver bugs. Either way, the GPU reset might lead the system to a broken state[1], that might be recovered if user has access to a tty or a remote shell. Arguably, this recovery could happen automatically by the system itself, thus this is the goal of this patchset. For debugging and report purposes, device coredump support was already added for amdgpu[2], but it's not suitable for programmatic usage like this one given the uAPI not being stable and the need for parsing. GL/VK is out of scope for this use, giving that we are dealing with device resets regardless of API. A basic userspace daemon is provided at [3] showing how the interface is used to recovery from resets. [1] A search for "reset" in DRM/AMD issue tracker shows reports of resets making the system unusable: https://gitlab.freedesktop.org/drm/amd/-/issues/?search=reset [2] https://lore.kernel.org/amd-gfx/20220602081538.1652842-2-Amaranath.Somalapuram@xxxxxxx/ [3] https://gitlab.freedesktop.org/andrealmeid/gpu-resetd v2: https://lore.kernel.org/dri-devel/20220308180403.75566-1-contactshashanksharma@xxxxxxxxx/ André Almeida (1): drm/amdgpu: Add work function for GPU reset event Shashank Sharma (1): drm: Add GPU reset sysfs event drivers/gpu/drm/amd/amdgpu/amdgpu.h | 4 +++ drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 30 ++++++++++++++++++++++ drivers/gpu/drm/drm_sysfs.c | 26 +++++++++++++++++++ include/drm/drm_sysfs.h | 13 ++++++++++ 4 files changed, 73 insertions(+) -- 2.38.1
