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drm/i915: Inline check required for object syncing prior to execbuf 

This trims a little overhead from the common case of not needing to
synchronize between rings.

v2: execlists is special and likes to duplicate code.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2015-04-27 13:41:18 +01:00 committed by Daniel Vetter
parent b47161858b
commit 03ade51185
2 changed files with 13 additions and 6 deletions
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10
drivers/gpu/drm/i915/i915_gem_execbuffer.c
View File

@ -889,6 +889,7 @@ static int
i915_gem_execbuffer_move_to_gpu(struct intel_engine_cs *ring,
struct list_head *vmas)
{
const unsigned other_rings = ~intel_ring_flag(ring);
struct i915_vma *vma;
uint32_t flush_domains = 0;
bool flush_chipset = false;
@ -896,9 +897,12 @@ i915_gem_execbuffer_move_to_gpu(struct intel_engine_cs *ring,
list_for_each_entry(vma, vmas, exec_list) {
struct drm_i915_gem_object *obj = vma->obj;
ret = i915_gem_object_sync(obj, ring);
if (ret)
return ret;
if (obj->active & other_rings) {
ret = i915_gem_object_sync(obj, ring);
if (ret)
return ret;
}
if (obj->base.write_domain & I915_GEM_DOMAIN_CPU)
flush_chipset |= i915_gem_clflush_object(obj, false);

9
drivers/gpu/drm/i915/intel_lrc.c
View File

@ -628,6 +628,7 @@ static int execlists_move_to_gpu(struct intel_ringbuffer *ringbuf,
struct list_head *vmas)
{
struct intel_engine_cs *ring = ringbuf->ring;
const unsigned other_rings = ~intel_ring_flag(ring);
struct i915_vma *vma;
uint32_t flush_domains = 0;
bool flush_chipset = false;
@ -636,9 +637,11 @@ static int execlists_move_to_gpu(struct intel_ringbuffer *ringbuf,
list_for_each_entry(vma, vmas, exec_list) {
struct drm_i915_gem_object *obj = vma->obj;
ret = i915_gem_object_sync(obj, ring);
if (ret)
return ret;
if (obj->active & other_rings) {
ret = i915_gem_object_sync(obj, ring);
if (ret)
return ret;
}
if (obj->base.write_domain & I915_GEM_DOMAIN_CPU)
flush_chipset |= i915_gem_clflush_object(obj, false);