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gpu: nvgpu: Rename PLATFORM_ATOMIC to SYSTEM_COHERENT

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To support current and future usecases, it would be
beneficial to select the SYSTEM_COHERENT aperture explicitly.

The benefits are:
- platform atomic code is cleaned-up.
- userspace can select the SYSTEM_COHERENT aperture for any
  specific usecases.

Bug 3959027

Change-Id: I6489ebe87fa75cc760930277bad5e0cacca80eb6
Signed-off-by: Martin Radev <mradev@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2864177
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
Reviewed-by: svc-mobile-misra <svc-mobile-misra@nvidia.com>
Reviewed-by: Seema Khowala <seemaj@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Martin Radev
2023-02-27 15:03:29 +02:00
committed by mobile promotions
parent 0babc089da
commit 81d95456b9
27 changed files with 84 additions and 91 deletions
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7
include/uapi/linux/nvgpu-as.h
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@@ -108,7 +108,7 @@ struct nvgpu_as_bind_channel_args {
#define NVGPU_AS_MAP_BUFFER_FLAGS_UNMAPPED_PTE (1 << 5)
#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_PLATFORM_ATOMIC (1 << 9)
#define NVGPU_AS_MAP_BUFFER_FLAGS_SYSTEM_COHERENT (1 << 9)
#define NVGPU_AS_MAP_BUFFER_FLAGS_TEGRA_RAW (1 << 12)
#define NVGPU_AS_MAP_BUFFER_FLAGS_ACCESS_BITMASK_OFFSET 10U
@@ -160,9 +160,10 @@ struct nvgpu_as_bind_channel_args {
*
* Deprecated.
*
* %NVGPU_AS_MAP_BUFFER_FLAGS_PLATFORM_ATOMIC
* %NVGPU_AS_MAP_BUFFER_FLAGS_SYSTEM_COHERENT
*
* Specify that a mapping should use platform atomics.
* Specify that a mapping should use the system coherent aperture.
* The mapping shall fail if the buffer is allocated from vidmem.
*
* @kind [IN]
*