This will be used in a later commit to trace the drm client_id in
some of the gpu_scheduler trace events.
This requires changing all the users of drm_sched_job_init to
add an extra parameter.
The newly added drm_client_id field in the drm_sched_fence is a bit
of a duplicate of the owner one. One
This is a pointer in the gpu's virtual address space. It must be
aligned according to ctxsw_align and be at least ctxsw_size bytes
(where those values come from the nouveau_abi16_ioctl_get_zcull_info
structure). I'll change the description to say that much.
Yes, this is GEM-backed. I'm actually no
