[PATCH 08/17] drm/i915: Always prefer CPU relocations with LLC

Rodrigo Vivi
2013-08-26T22:51:36Z

From: Chris Wilson <chris@chris-wilson.co.uk>

A follow-on to the update of the LLC coherency logic is that we can rely
on the LLC being coherent with the CS for rewriting batchbuffers
irrespective of their cache domain. (This should have no effect
currently as all the batch buffers are expected to be I915_CACHE_LLC and
so using the cpu relocation path anyway.)

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/i915_gem_execbuffer.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 792c52a..3b64b9f 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -166,7 +166,8 @@ eb_destroy(struct eb_objects *eb)

static inline int use_cpu_reloc(struct drm_i915_gem_object *obj)
{
- return (obj->base.write_domain == I915_GEM_DOMAIN_CPU ||
+ return (HAS_LLC(obj->base.dev) ||
+ obj->base.write_domain == I915_GEM_DOMAIN_CPU ||
!obj->map_and_fenceable ||
obj->cache_level != I915_CACHE_NONE);
}
@@ -179,7 +180,7 @@ relocate_entry_cpu(struct drm_i915_gem_object *obj,
char *vaddr;
int ret = -EINVAL;

- ret = i915_gem_object_set_to_cpu_domain(obj, 1);
+ ret = i915_gem_object_set_to_cpu_domain(obj, true);
if (ret)
return ret;

--
1.8.1.4