[Intel-gfx] [PATCH 1/2] drm/i915/trace: Describe engines as class:instance pairs

[Chris Wilson]

Quoting Tvrtko Ursulin (2018-05-24 16:04:46)
> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> 
> Instead of using the engine->id, use uabi_class:instance pairs in trace-
> points including engine info.

Should we not pack dev,hw_id,class,instance into u16s?

> This will be more readable, more future proof and more stable for
> userspace consumption.
> 
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: svetlana.kukanova at intel.com
> ---
> @@ -616,7 +621,8 @@ TRACE_EVENT(i915_request_queue,
>             TP_STRUCT__entry(
>                              __field(u32, dev)
>                              __field(u32, hw_id)
> -                            __field(u32, ring)
> +                            __field(u32, class)
> +                            __field(u32, instance)
>                              __field(u32, ctx)

ctx needs u64 :(

I've no objection to switching to our hopefully futureproof uabi
nomenclature.

Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris