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gpu: nvgpu: select map access type from dmabuf permission and user request

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Add api to translate dmabuf's fmode_t to gk20a_mem_rw_flag
for read only/read write mapping selection.

By default dmabuf fd mapping permission should be a maximum
access permission associated to a particual dmabuf fd.

Remove bit flag MAP_ACCESS_NO_WRITE and add 2 bit values for
user access requests NVGPU_VM_MAP_ACCESS_DEFAULT|READ_ONLY|
READ_WRITE.

To unify map access type handling in Linux and QNX move the
parameter NVGPU_VM_MAP_ACCESS_* check to common function
nvgpu_vm_map.

Set MAP_ACCESS_TYPE enabled flag in common characteristics
init function as it is supported for Linux and QNX.

Bug 200717195
Bug 3250920

Change-Id: I1a249f7c52bda099390dd4f371b005e1a7cef62f
Signed-off-by: Lakshmanan M <lm@nvidia.com>
Signed-off-by: Sagar Kamble <skamble@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2507150
Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-misra <svc-mobile-misra@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Lakshmanan M
2021-03-29 15:02:08 +05:30
committed by mobile promotions
parent 261bdb9cc2
commit 19186c8a02
9 changed files with 105 additions and 17 deletions
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8
include/uapi/linux/nvgpu-as.h
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@@ -110,7 +110,13 @@ struct nvgpu_as_bind_channel_args {
#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)
#define NVGPU_AS_MAP_BUFFER_FLAGS_ACCESS_NO_WRITE (1 << 10)
#define NVGPU_AS_MAP_BUFFER_FLAGS_ACCESS_BITMASK_OFFSET 10U
#define NVGPU_AS_MAP_BUFFER_FLAGS_ACCESS_BITMASK_SIZE 2U
#define NVGPU_AS_MAP_BUFFER_ACCESS_DEFAULT 0U
#define NVGPU_AS_MAP_BUFFER_ACCESS_READ_ONLY 1U
#define NVGPU_AS_MAP_BUFFER_ACCESS_READ_WRITE 2U
/*
* VM map buffer IOCTL