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authorChris Wilson <chris@chris-wilson.co.uk>2010-05-27 14:21:01 +0100
committerEric Anholt <eric@anholt.net>2010-05-28 11:02:00 -0700
commit9b8c4a0b215e603497daebe8ecbc9b1f0f035808 (patch)
tree50aa5824d31631d4b4ec21d5fd23a581d715c092 /drivers/gpu/drm
parent68f95ba9e260516411411524c45263b5d53f393c (diff)
downloadblackbird-op-linux-9b8c4a0b215e603497daebe8ecbc9b1f0f035808.tar.gz
blackbird-op-linux-9b8c4a0b215e603497daebe8ecbc9b1f0f035808.zip
drm/i915: Avoid moving from CPU domain during pwrite
We can avoid an early clflush when pwriting if we use the current CPU write domain rather than moving the object to the GTT domain for the purposes of the pwrite. This has the advantage of not flushing the presumably hot data that we want to upload into the bo, and of ascribing the clflush to the execution when profiling. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Eric Anholt <eric@anholt.net>
Diffstat (limited to 'drivers/gpu/drm')
-rw-r--r--drivers/gpu/drm/i915/i915_gem.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 42866c01540d..4590c78f4283 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -971,7 +971,8 @@ i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
if (obj_priv->phys_obj)
ret = i915_gem_phys_pwrite(dev, obj, args, file_priv);
else if (obj_priv->tiling_mode == I915_TILING_NONE &&
- dev->gtt_total != 0) {
+ dev->gtt_total != 0 &&
+ obj->write_domain != I915_GEM_DOMAIN_CPU) {
ret = i915_gem_gtt_pwrite_fast(dev, obj, args, file_priv);
if (ret == -EFAULT) {
ret = i915_gem_gtt_pwrite_slow(dev, obj, args,
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