[Intel-gfx] [PATCH 8/8] drm/i915: Keep track of reserved execlist ports

[Chris Wilson]

Quoting Mika Kuoppala (2017-09-12 09:36:18)
> @@ -1351,12 +1363,16 @@ static void reset_common_ring(struct intel_engine_cs *engine,
>                 return;
>         }
>  
> -       if (request->ctx != port_request(port)->ctx) {
> -               i915_gem_request_put(port_request(port));
> -               execlist_port_complete(el, port);
> -       }
> +       if (execlist_active_ports(el)) {
> +               struct execlist_port *port = execlist_port_head(el);
>  
> -       GEM_BUG_ON(request->ctx != port_request(port)->ctx);

This needs a FIXME at least.
For starters we need to drop requests until the ctx match (i.e. while
(rq->ctx != port_request(port)->ctx)) and then we have the issue that we
may have the same ctx multiple times in an N slot elsp. So
while (rq->ctx != port_rquest(port)->ctx || i915_gem_request_completed(port_request(port)))
?
-Chris