diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c index c87515210c4f..ed58fa5af056 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c @@ -82,6 +82,25 @@ static bool kfd_mem_is_attached(struct amdgpu_vm *avm, return false; } +/** + * reuse_dmamap() - Check whether adev can share the original + * userptr BO + * + * If both adev and bo_adev are in direct mapping or + * in the same iommu group, they can share the original BO. + * + * @adev: Device to which can or cannot share the original BO + * @bo_adev: Device to which allocated BO belongs to + * + * Return: returns true if adev can share original userptr BO, + * false otherwise. + */ +static bool reuse_dmamap(struct amdgpu_device *adev, struct amdgpu_device *bo_adev) +{ + return (adev->ram_is_direct_mapped && bo_adev->ram_is_direct_mapped) || + (adev->dev->iommu_group == bo_adev->dev->iommu_group); +} + /* Set memory usage limits. Current, limits are * System (TTM + userptr) memory - 15/16th System RAM * TTM memory - 3/8th System RAM @@ -805,11 +824,11 @@ static int kfd_mem_attach(struct amdgpu_device *adev, struct kgd_mem *mem, va + bo_size, vm); if ((adev == bo_adev && !(mem->alloc_flags & KFD_IOC_ALLOC_MEM_FLAGS_MMIO_REMAP)) || - (amdgpu_ttm_tt_get_usermm(mem->bo->tbo.ttm) && adev->ram_is_direct_mapped) || - same_hive) { + (amdgpu_ttm_tt_get_usermm(mem->bo->tbo.ttm) && reuse_dmamap(adev, bo_adev)) || + same_hive) { /* Mappings on the local GPU, or VRAM mappings in the - * local hive, or userptr mapping IOMMU direct map mode - * share the original BO + * local hive, or userptr mapping can reuse dma map + * address space share the original BO */ attachment[i]->type = KFD_MEM_ATT_SHARED; bo[i] = mem->bo; |