On Wed, Nov 12, 2014 at 10:53:26AM +0000, Nick Hoath wrote:
seq_putc(m, '\n');
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index afa9c35..0fe238c 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -2027,6 +2027,28 @@ struct drm_i915_gem_request {
> struct list_head free_list;
>
> uint32_t uniq;
> +
> + /**
> + * The ELSP only accepts two elements at a time, so we queue
> context/tail
> + * pairs on a given queue (ring->execlist_queue) until the hardware is
> + * available. The queue serves a double purpose: we also use it to keep
> track
> + * of the up to 2 contexts currently in the hardware (usually one in
> execution
> + * and the other queued up by the GPU): We only remove elements from
> the head
> + * of the queue when the hardware informs us that an element has been
> + * completed.
> + *
> + * All accesses to the queue are mediated by a spinlock
> (ring->execlist_lock).
> + */
> +
> + /** Execlist link in the submission queue.*/
> + struct list_head execlist_link;
This is redundant. The request should only be one of the pending or active
lists at any time.
> + /** Execlists workqueue for processing this request in a bottom half */
> + struct work_struct work;
For what purpose? This is not needed.
> + /** Execlists no. of times this request has been sent to the ELSP */
> + int elsp_submitted;
A request can only be submitted exactly once at any time. This
bookkeeping is not part of the request.
Still not detangled I am afraid.
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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