[PATCH v3] drm/vc4: Expose performance counters to userspace

[Eric Anholt]

Boris Brezillon <boris.brezillon at free-electrons.com> writes:

> The V3D engine has various hardware counters which might be interesting
> to userspace performance analysis tools.
>
> Expose new ioctls to create/destroy a performance monitor object and
> query the counter values of this perfmance monitor.
>
> Note that a perfomance monitor is given an ID that is only valid on the
> file descriptor it has been allocated from. A performance monitor can be
> attached to a CL submission and the driver will enable HW counters for
> this request and update the performance monitor values at the end of the
> job.
>
> Signed-off-by: Boris Brezillon <boris.brezillon at free-electrons.com>
> Reviewed-by: Eric Anholt <eric at anholt.net>

Pushed.  Thanks!
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