From 149c86e74fe44dcbac5e9f8d145c5fbc5dc21261 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Tue, 7 Apr 2015 16:21:11 +0100 Subject: [PATCH] drm/i915: Allocate context objects from stolen As we never expose context objects directly to userspace, we can forgo allocating a first-class GEM object for them and prefer to use the limited resource of reserved/stolen memory for them. Note this means that their initial contents are undefined. However, a downside of using stolen objects for execlists is that we cannot access the physical address directly (thanks MCH!) which prevents their use. Signed-off-by: Chris Wilson Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_gem_context.c | 4 +++- drivers/gpu/drm/i915/intel_lrc.c | 2 +- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c index f3e84c44d009..e4c57a3981b3 100644 --- a/drivers/gpu/drm/i915/i915_gem_context.c +++ b/drivers/gpu/drm/i915/i915_gem_context.c @@ -157,7 +157,9 @@ i915_gem_alloc_context_obj(struct drm_device *dev, size_t size) struct drm_i915_gem_object *obj; int ret; - obj = i915_gem_alloc_object(dev, size); + obj = i915_gem_object_create_stolen(dev, size); + if (obj == NULL) + obj = i915_gem_alloc_object(dev, size); if (obj == NULL) return ERR_PTR(-ENOMEM); diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index 88c577cdd038..aa3ea64e4815 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -1845,7 +1845,7 @@ int intel_lr_context_deferred_create(struct intel_context *ctx, context_size = round_up(get_lr_context_size(ring), 4096); - ctx_obj = i915_gem_alloc_context_obj(dev, context_size); + ctx_obj = i915_gem_alloc_object(dev, context_size); if (IS_ERR(ctx_obj)) { ret = PTR_ERR(ctx_obj); DRM_DEBUG_DRIVER("Alloc LRC backing obj failed: %d\n", ret); -- 2.34.1