From 9f792ebafe0079e6cedde726ea943bc0f412ff6b Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 14 Nov 2016 20:41:04 +0000 Subject: [PATCH] drm/i915: Store the execution priority on the context In order to support userspace defining different levels of importance to different contexts, and in particular the preferred order of execution, store a priority value on each context. By default, the kernel's context, which is used for idling and other background tasks, is given minimum priority (i.e. all user contexts will execute before the kernel). Signed-off-by: Chris Wilson Reviewed-by: Tvrtko Ursulin Link: http://patchwork.freedesktop.org/patch/msgid/20161114204105.29171-9-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/i915_gem_context.c | 1 + drivers/gpu/drm/i915/i915_gem_request.c | 2 +- 3 files changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 00a0c6c2515a..0e7e33b73d09 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -936,6 +936,7 @@ struct i915_gem_context { /* Unique identifier for this context, used by the hw for tracking */ unsigned int hw_id; u32 user_handle; + int priority; /* greater priorities are serviced first */ u32 ggtt_alignment; diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c index 6dd475735f0a..1f94b8d6d83d 100644 --- a/drivers/gpu/drm/i915/i915_gem_context.c +++ b/drivers/gpu/drm/i915/i915_gem_context.c @@ -476,6 +476,7 @@ int i915_gem_context_init(struct drm_device *dev) return PTR_ERR(ctx); } + ctx->priority = I915_PRIORITY_MIN; /* lowest priority; idle task */ dev_priv->kernel_context = ctx; DRM_DEBUG_DRIVER("%s context support initialized\n", diff --git a/drivers/gpu/drm/i915/i915_gem_request.c b/drivers/gpu/drm/i915/i915_gem_request.c index 13574a1e29b1..b9b5253cf3cd 100644 --- a/drivers/gpu/drm/i915/i915_gem_request.c +++ b/drivers/gpu/drm/i915/i915_gem_request.c @@ -867,7 +867,7 @@ void __i915_add_request(struct drm_i915_gem_request *request, bool flush_caches) * run at the earliest possible convenience. */ if (engine->schedule) - engine->schedule(request, 0); + engine->schedule(request, request->ctx->priority); local_bh_disable(); i915_sw_fence_commit(&request->submit); -- 2.20.1