gpu: nvgpu: use coherent aperture for coherent buffers

Use sysmem_coherent aperture if the buffer mappings are requested
to be IO coherent. Use sysmem_noncoherent aperture otherwise. This
is implemented by adding a new coherent field to the GMMU attrs
struct.

Jira GPUT19X-17
Bug 1651331
Bug 200283998

Change-Id: I5cfb71b5913d4db50ebf10331b19f5a4216456bf
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master/r/1514438
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>

1 files changed, 0 insertions, 6 deletions

diff --git a/include/uapi/linux/nvgpu-t18x.h b/include/uapi/linux/nvgpu-t18x.h
index 16cbd81e..59db77c7 100644
--- a/include/uapi/linux/nvgpu-t18x.h
+++ b/include/uapi/linux/nvgpu-t18x.h
@@ -25,12 +25,6 @@
 #define _UAPI__LINUX_NVGPU_T18X_IOCTL_H_
 
 /*
- * this flag is used in struct nvgpu_as_map_buffer_ex_args
- * to specify IO coherence
- */
-#define NVGPU_AS_MAP_BUFFER_FLAGS_IO_COHERENT       (1 << 4)
-
-/*
  * this flag is used in struct nvgpu_alloc_gpfifo_args
  * to enable re-playable faults for that channel
  */