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authorDave Airlie <airlied@redhat.com>2012-08-16 10:15:34 +1000
committerDaniel Vetter <daniel.vetter@ffwll.ch>2012-08-17 10:10:06 +0200
commitec6f1bb90c9865d4a5af01b1c643bcf020d88706 (patch)
treeba4ab858b7d96ea08ace354332eb9c79bafb65eb /include/drm
parent0826874a664f9e9479d50fda23923b87a50cda0d (diff)
drm/i915: implement dma buf begin_cpu_access (v2)
In order for udl vmap to work properly, we need to push the object into the CPU domain before we start copying the data to the USB device. This along with the udl change avoids userspace explicit mapping to be used. v2: add a flag for userspace to query to know if Intel kernel driver can deal with the vmap flushing properly. In theory udl would need a flag also, but I intend to push the patches very close to each other and other drivers should do the right thing from the start. I've added a test to my intel-gpu-tools prime branch, however testing this is a bit messy since the only way to get udl to vmap is to rendering something. I've tested this with real code as well to make sure it works. Signed-off-by: Dave Airlie <airlied@redhat.com> [danvet: resolved conflict, which required reallocating the PARAM number to 21.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'include/drm')
-rw-r--r--include/drm/i915_drm.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/drm/i915_drm.h b/include/drm/i915_drm.h
index d8a79bf59ae..05e24d31f32 100644
--- a/include/drm/i915_drm.h
+++ b/include/drm/i915_drm.h
@@ -312,6 +312,7 @@ typedef struct drm_i915_irq_wait {
#define I915_PARAM_HAS_ALIASING_PPGTT 18
#define I915_PARAM_HAS_WAIT_TIMEOUT 19
#define I915_PARAM_HAS_SEMAPHORES 20
+#define I915_PARAM_HAS_PRIME_VMAP_FLUSH 21
typedef struct drm_i915_getparam {
int param;