This patch series enables KFD to interoperate more closely with DRM render nodes. ROCm user mode already uses DRM render nodes to create its GPU VM contexts and to CPU-map its GEM buffer objects. This patch series adds an API to let KFD export its BOs as DMABufs, so they can be imported into the DRM render nodes. This enables more flexible virtual memory mappings using DRM_IOCTL_AMDGPU_GEM_VA. Patches 1 and 2 deal with the exporting and importing of DMABufs. The remaining patches let KFD validate and update GPUVM mappings managed through render nodes. The user mode side of this patch series can be seen in libhsakmt and KFDTest where we improve integration with libdrm (initializing amdgpu_device instances) to enable DMABuf imports into the render nodes representing KFD GPU VM contexts. KFDTest is modified to test evictions and validations of BOs mapped through amdgpu_bo_va_op: https://github.com/fxkamd/ROCT-Thunk-Interface/commits/fxkamd/dmabuf As a consequence, applications using Mesa and ROCm in the same process on the same GPU will now share a single render node FD and GPUVM address space. The DMABuf export API will also be used later for upstream IPC and RDMA implementation. Felix Kuehling (6): drm/amdgpu: Generalize KFD dmabuf import drm/amdkfd: Implement DMA buf fd export from KFD drm/amdkfd: Improve amdgpu_vm_handle_moved drm/amdgpu: Attach eviction fence on alloc drm/amdgpu: update mappings not managed by KFD drm/amdgpu: Do bo_va ref counting for KFD BOs drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h | 2 + .../gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 196 ++++++++++++------ drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 6 +- drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 18 +- drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 3 +- drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 55 +++++ include/uapi/linux/kfd_ioctl.h | 14 +- 8 files changed, 219 insertions(+), 77 deletions(-) -- 2.32.0
