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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2010-10-28 14:44:08 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2010-10-28 20:55:03 +0100 |
| commit | 4a684a4117abd756291969336af454e8a958802f (patch) | |
| tree | 1058cb8db13c0cad6ba99be37094fe27d0684714 | |
| parent | e5281ccd2e0049e2b9e8ce82449630d25082372d (diff) | |
| download | op-kernel-dev-4a684a4117abd756291969336af454e8a958802f.zip op-kernel-dev-4a684a4117abd756291969336af454e8a958802f.tar.gz | |
drm/i915: Kill GTT mappings when moving from GTT domain
In order to force a page-fault on a GTT mapping after we start using it
from the GPU and so enforce correct CPU/GPU synchronisation, we need to
invalidate the mapping.
Pointed out by Owain G. Ainsworth.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index abe6d90..d4d8f88 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1314,12 +1314,12 @@ int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) ret = i915_gem_object_bind_to_gtt(obj, 0, true); if (ret) goto unlock; - - ret = i915_gem_object_set_to_gtt_domain(obj, write); - if (ret) - goto unlock; } + ret = i915_gem_object_set_to_gtt_domain(obj, write); + if (ret) + goto unlock; + if (!obj_priv->fault_mappable) { obj_priv->fault_mappable = true; i915_gem_info_update_mappable(dev_priv, obj, true); @@ -2859,6 +2859,8 @@ i915_gem_object_flush_gtt_write_domain(struct drm_gem_object *obj) * to it immediately go to main memory as far as we know, so there's * no chipset flush. It also doesn't land in render cache. */ + i915_gem_release_mmap(obj); + old_write_domain = obj->write_domain; obj->write_domain = 0; @@ -3183,6 +3185,10 @@ i915_gem_object_set_to_gpu_domain(struct drm_gem_object *obj, if ((flush_domains | invalidate_domains) & I915_GEM_DOMAIN_CPU) i915_gem_clflush_object(obj); + /* blow away mappings if mapped through GTT */ + if ((flush_domains | invalidate_domains) & I915_GEM_DOMAIN_GTT) + i915_gem_release_mmap(obj); + /* The actual obj->write_domain will be updated with * pending_write_domain after we emit the accumulated flush for all * of our domain changes in execbuffers (which clears objects' |
