msm: kgsl: Add the flags for IO coherency
Add a flag in the UAPI header to allow userspace to mark a buffer
as IO coherent. If this flag is set, mark the buffer as IO
coherent when mapping it.
Change-Id: I4cd28144cf818fa016e085f6f5ec29b778ccd8ad
Signed-off-by: Shrenuj Bansal <shrenujb@codeaurora.org>
Signed-off-by: Lynus Vaz <lvaz@codeaurora.org>
diff --git a/drivers/gpu/msm/kgsl_iommu.c b/drivers/gpu/msm/kgsl_iommu.c
index dc0e733..476ad98 100644
--- a/drivers/gpu/msm/kgsl_iommu.c
+++ b/drivers/gpu/msm/kgsl_iommu.c
@@ -1840,6 +1840,9 @@
if (memdesc->priv & KGSL_MEMDESC_PRIVILEGED)
flags |= IOMMU_PRIV;
+ if (memdesc->flags & KGSL_MEMFLAGS_IOCOHERENT)
+ flags |= IOMMU_CACHE;
+
return flags;
}