From 0de9136dbbc9f6882bb375270eaddf1b999081bf Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 14 Nov 2016 20:41:01 +0000 Subject: drm/i915/scheduler: Signal the arrival of a new request The start of the scheduler, add a hook into request submission for the scheduler to see the arrival of new requests and prepare its runqueues. Signed-off-by: Chris Wilson Reviewed-by: Tvrtko Ursulin Link: http://patchwork.freedesktop.org/patch/msgid/20161114204105.29171-6-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_gem_request.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'drivers/gpu/drm/i915/i915_gem_request.c') diff --git a/drivers/gpu/drm/i915/i915_gem_request.c b/drivers/gpu/drm/i915/i915_gem_request.c index 952d2aec5244..1118cf48d6f0 100644 --- a/drivers/gpu/drm/i915/i915_gem_request.c +++ b/drivers/gpu/drm/i915/i915_gem_request.c @@ -762,6 +762,19 @@ void __i915_add_request(struct drm_i915_gem_request *request, bool flush_caches) i915_gem_mark_busy(engine); + /* Let the backend know a new request has arrived that may need + * to adjust the existing execution schedule due to a high priority + * request - i.e. we may want to preempt the current request in order + * to run a high priority dependency chain *before* we can execute this + * request. + * + * This is called before the request is ready to run so that we can + * decide whether to preempt the entire chain so that it is ready to + * run at the earliest possible convenience. + */ + if (engine->schedule) + engine->schedule(request, 0); + local_bh_disable(); i915_sw_fence_commit(&request->submit); local_bh_enable(); /* Kick the execlists tasklet if just scheduled */ -- cgit v1.2.3-55-g7522