gpu: nvgpu: add platform atomic support

Add new variable in nvgpu_as_map_buffer_ex_args for app
to specify the platform atomic support for the page.
When platform atomic attribute flag is set, pte memory
aperture is set to be coherent type.

renamed nvgpu_aperture_mask_coh -> nvgpu_aperture_mask_raw
function.

bug 200580236

Change-Id: I18266724dafdc8dfd96a0711f23cf08e23682afc
Signed-off-by: Vinod G <vinodg@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2012679
(cherry picked from commit 9e0a9004b71f92b7713fd3b30141b0d9d4cfa2c6)
Signed-off-by: Lakshmanan M <lm@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2274914
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
GVS: Gerrit_Virtual_Submit
Tested-by: Sreeniketh H <sh@nvidia.com>
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/include/uapi/linux/nvgpu.h b/include/uapi/linux/nvgpu.h
index 0488e563..9197011b 100644
--- a/include/uapi/linux/nvgpu.h
+++ b/include/uapi/linux/nvgpu.h
@@ -1,7 +1,7 @@
 /*
  * NVGPU Public Interface Header
  *
- * Copyright (c) 2011-2018, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2011-2020, NVIDIA CORPORATION.  All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -1894,6 +1894,7 @@ struct nvgpu_as_bind_channel_args {
 #define NVGPU_AS_MAP_BUFFER_FLAGS_MAPPABLE_COMPBITS (1 << 6)
 #define NVGPU_AS_MAP_BUFFER_FLAGS_L3_ALLOC          (1 << 7)
 #define NVGPU_AS_MAP_BUFFER_FLAGS_DIRECT_KIND_CTRL  (1 << 8)
+#define NVGPU_AS_MAP_BUFFER_FLAGS_PLATFORM_ATOMIC   (1 << 9)
 
 /*
  * VM map buffer IOCTL
@@ -1940,6 +1941,10 @@ struct nvgpu_as_bind_channel_args {
  *     Set when userspace plans to pass in @compr_kind and @incompr_kind
  *     instead of letting the kernel work out kind fields.
  *
+ *   %NVGPU_AS_MAP_BUFFER_FLAGS_PLATFORM_ATOMIC
+ *
+ *     Specify that a mapping should use platform atomics.
+ *
  * @kind  [IN]
  *
  *   Specify the kind to use for the mapping.