diff options
| author | Philip Yang <Philip.Yang@amd.com> | 2024-04-05 22:46:50 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2024-04-30 16:44:46 +0300 |
| commit | 155ce502e9adf9001d6fa35ca85843b7f0e538c7 (patch) | |
| tree | 6df6d718730cee11eac82044a160c90c8b5d6fa3 | |
| parent | c0d6bd3cd209419cc46ac49562bef1db65d90e70 (diff) | |
| download | linux-155ce502e9adf9001d6fa35ca85843b7f0e538c7.tar.xz | |
drm/amdgpu: Support contiguous VRAM allocation
RDMA device with limited scatter-gather ability requires contiguous VRAM
buffer allocation for RDMA peer direct support.
Add a new KFD alloc memory flag and store as bo alloc flag
AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS. When pin this bo to export for RDMA
peerdirect access, this will set TTM_PL_FLAG_CONTIFUOUS flag, and ask
VRAM buddy allocator to get contiguous VRAM.
Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 4 | ||||
| -rw-r--r-- | include/uapi/linux/kfd_ioctl.h | 1 |
2 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c index e4d4e55c08ad..5c06279c6bef 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c @@ -1712,6 +1712,10 @@ int amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu( alloc_flags = AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE; alloc_flags |= (flags & KFD_IOC_ALLOC_MEM_FLAGS_PUBLIC) ? AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED : 0; + + /* For contiguous VRAM allocation */ + if (flags & KFD_IOC_ALLOC_MEM_FLAGS_CONTIGUOUS) + alloc_flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS; } xcp_id = fpriv->xcp_id == AMDGPU_XCP_NO_PARTITION ? 0 : fpriv->xcp_id; diff --git a/include/uapi/linux/kfd_ioctl.h b/include/uapi/linux/kfd_ioctl.h index 2040a470ddb4..d09c4a18e571 100644 --- a/include/uapi/linux/kfd_ioctl.h +++ b/include/uapi/linux/kfd_ioctl.h @@ -407,6 +407,7 @@ struct kfd_ioctl_acquire_vm_args { #define KFD_IOC_ALLOC_MEM_FLAGS_COHERENT (1 << 26) #define KFD_IOC_ALLOC_MEM_FLAGS_UNCACHED (1 << 25) #define KFD_IOC_ALLOC_MEM_FLAGS_EXT_COHERENT (1 << 24) +#define KFD_IOC_ALLOC_MEM_FLAGS_CONTIGUOUS (1 << 23) /* Allocate memory for later SVM (shared virtual memory) mapping. * |