This is the first version of our HMM based shared virtual memory manager for KFD. There are still a number of known issues that we're working through (see below). This will likely lead to some pretty significant changes in MMU notifier handling and locking on the migration code paths. So don't get hung up on those details yet. But I think this is a good time to start getting feedback. We're pretty confident about the ioctl API, which is both simple and extensible for the future. (see patches 4,16) The user mode side of the API can be found here: https://github.com/RadeonOpenCompute/ROCT-Thunk-Interface/blob/fxkamd/hmm-wip/src/svm.c I'd also like another pair of eyes on how we're interfacing with the GPU VM code in amdgpu_vm.c (see patches 12,13), retry page fault handling (24,25), and some retry IRQ handling changes (32). Known issues: * won't work with IOMMU enabled, we need to dma_map all pages properly * still working on some race conditions and random bugs * performance is not great yet Alex Sierra (12): drm/amdgpu: replace per_device_list by array drm/amdkfd: helper to convert gpu id and idx drm/amdkfd: add xnack enabled flag to kfd_process drm/amdkfd: add ioctl to configure and query xnack retries drm/amdkfd: invalidate tables on page retry fault drm/amdkfd: page table restore through svm API drm/amdkfd: SVM API call to restore page tables drm/amdkfd: add svm_bo reference for eviction fence drm/amdgpu: add param bit flag to create SVM BOs drm/amdkfd: add svm_bo eviction mechanism support drm/amdgpu: svm bo enable_signal call condition drm/amdgpu: add svm_bo eviction to enable_signal cb Philip Yang (23): drm/amdkfd: select kernel DEVICE_PRIVATE option drm/amdkfd: add svm ioctl API drm/amdkfd: Add SVM API support capability bits drm/amdkfd: register svm range drm/amdkfd: add svm ioctl GET_ATTR op drm/amdgpu: add common HMM get pages function drm/amdkfd: validate svm range system memory drm/amdkfd: register overlap system memory range drm/amdkfd: deregister svm range drm/amdgpu: export vm update mapping interface drm/amdkfd: map svm range to GPUs drm/amdkfd: svm range eviction and restore drm/amdkfd: register HMM device private zone drm/amdkfd: validate vram svm range from TTM drm/amdkfd: support xgmi same hive mapping drm/amdkfd: copy memory through gart table drm/amdkfd: HMM migrate ram to vram drm/amdkfd: HMM migrate vram to ram drm/amdgpu: reserve fence slot to update page table drm/amdgpu: enable retry fault wptr overflow drm/amdkfd: refine migration policy with xnack on drm/amdkfd: add svm range validate timestamp drm/amdkfd: multiple gpu migrate vram to vram drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c | 3 + drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h | 4 +- .../gpu/drm/amd/amdgpu/amdgpu_amdkfd_fence.c | 16 +- .../gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 13 +- drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c | 83 + drivers/gpu/drm/amd/amdgpu/amdgpu_mn.h | 7 + drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 5 + drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 90 +- drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 47 +- drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 10 + drivers/gpu/drm/amd/amdgpu/vega10_ih.c | 32 +- drivers/gpu/drm/amd/amdgpu/vega20_ih.c | 32 +- drivers/gpu/drm/amd/amdkfd/Kconfig | 1 + drivers/gpu/drm/amd/amdkfd/Makefile | 4 +- drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 170 +- drivers/gpu/drm/amd/amdkfd/kfd_iommu.c | 8 +- drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 866 ++++++ drivers/gpu/drm/amd/amdkfd/kfd_migrate.h | 59 + drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 52 +- drivers/gpu/drm/amd/amdkfd/kfd_process.c | 200 +- .../amd/amdkfd/kfd_process_queue_manager.c | 6 +- drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 2564 +++++++++++++++++ drivers/gpu/drm/amd/amdkfd/kfd_svm.h | 135 + drivers/gpu/drm/amd/amdkfd/kfd_topology.c | 1 + drivers/gpu/drm/amd/amdkfd/kfd_topology.h | 10 +- include/uapi/linux/kfd_ioctl.h | 169 +- 26 files changed, 4296 insertions(+), 291 deletions(-) create mode 100644 drivers/gpu/drm/amd/amdkfd/kfd_migrate.c create mode 100644 drivers/gpu/drm/amd/amdkfd/kfd_migrate.h create mode 100644 drivers/gpu/drm/amd/amdkfd/kfd_svm.c create mode 100644 drivers/gpu/drm/amd/amdkfd/kfd_svm.h -- 2.29.2 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
