This is an initial patch series to move discrete memory management over to TTM. It will be followed up shortly with adding more functionality.
The buddy allocator is temporarily removed along with its selftests and It is replaced with the TTM range manager and some selftests are adjusted to account for introduced fragmentation. Work is ongoing to reintroduce the buddy allocator as a TTM resource manager.
A new memcpy ttm move is introduced that uses kmap_local() functionality rather than vmap(). Among other things stated in the patch commit message it helps us deal with page-pased LMEM memory. It is generic enough to replace the ttm memcpy move with some additional work if so desired. On x86 it also enables prefetching reads from write-combined memory.
Finally the old i915 gem object LMEM backend is replaced with a i915 gem object TTM backend and some additional i915 gem object ops are introduced to support the added functionality. Currently it is used only to support management and eviction of the LMEM region, but work is underway to extend the support to system memory. In this way we use TTM the way it was originally intended, having the GPU binding taken care of by driver code.
Intention is to follow up with - System memory support - Pipelined accelerated moves / migration - Re-added buddy allocator in the TTM framework
v2: - Add patches to move pagefaulting over to TTM - Break out TTM changes to separate patches - Address various review comments as detailed in the affected patches
v3: - Drop TTM pagefaulting patches for now due changing approach due to a NAK. - Address feedback on TTM patches - Move the new TTM memcpy functionality into TTM. - Move fast WC memcpy to drm - Various fixes all over the place as shown in patch commit messages.
Cc: Christian König christian.koenig@amd.com
Thomas Hellström (12): drm/i915: Untangle the vma pages_mutex drm/i915: Don't free shared locks while shared drm/i915: Fix i915_sg_page_sizes to record dma segments rather than physical pages drm/i915/ttm Initialize the ttm device and memory managers drm/i915/ttm: Embed a ttm buffer object in the i915 gem object drm/ttm: Add a generic TTM memcpy move for page-based iomem drm, drm/i915: Move the memcpy_from_wc functionality to core drm drm/ttm: Use drm_memcpy_from_wc_dbm for TTM bo moves drm/ttm: Document and optimize ttm_bo_pipeline_gutting() drm/ttm, drm/amdgpu: Allow the driver some control over swapping drm/i915/ttm: Introduce a TTM i915 gem object backend drm/i915/lmem: Verify checks for lmem residency
drivers/gpu/drm/Makefile | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 4 + drivers/gpu/drm/drm_drv.c | 2 + .../drm/{i915/i915_memcpy.c => drm_memcpy.c} | 63 +- drivers/gpu/drm/i915/Kconfig | 1 + drivers/gpu/drm/i915/Makefile | 4 +- drivers/gpu/drm/i915/display/intel_display.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_create.c | 9 +- drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c | 2 +- .../gpu/drm/i915/gem/i915_gem_execbuffer.c | 4 +- drivers/gpu/drm/i915/gem/i915_gem_lmem.c | 71 +- drivers/gpu/drm/i915/gem/i915_gem_lmem.h | 5 - drivers/gpu/drm/i915/gem/i915_gem_object.c | 154 +++- drivers/gpu/drm/i915/gem/i915_gem_object.h | 13 + .../gpu/drm/i915/gem/i915_gem_object_types.h | 49 +- drivers/gpu/drm/i915/gem/i915_gem_pages.c | 3 +- drivers/gpu/drm/i915/gem/i915_gem_phys.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_region.c | 126 +-- drivers/gpu/drm/i915/gem/i915_gem_region.h | 4 - drivers/gpu/drm/i915/gem/i915_gem_shmem.c | 4 +- drivers/gpu/drm/i915/gem/i915_gem_stolen.c | 10 +- drivers/gpu/drm/i915/gem/i915_gem_stolen.h | 9 +- drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 531 ++++++++++++ drivers/gpu/drm/i915/gem/i915_gem_ttm.h | 50 ++ drivers/gpu/drm/i915/gem/i915_gem_userptr.c | 2 +- drivers/gpu/drm/i915/gt/intel_ggtt.c | 19 +- drivers/gpu/drm/i915/gt/intel_gt.c | 2 - drivers/gpu/drm/i915/gt/intel_gtt.c | 45 +- drivers/gpu/drm/i915/gt/intel_gtt.h | 28 +- drivers/gpu/drm/i915/gt/intel_ppgtt.c | 2 +- drivers/gpu/drm/i915/gt/intel_region_lmem.c | 30 +- drivers/gpu/drm/i915/gt/selftest_reset.c | 7 +- drivers/gpu/drm/i915/gt/uc/intel_guc_log.c | 11 +- drivers/gpu/drm/i915/i915_buddy.c | 435 ---------- drivers/gpu/drm/i915/i915_buddy.h | 131 --- drivers/gpu/drm/i915/i915_cmd_parser.c | 4 +- drivers/gpu/drm/i915/i915_drv.c | 15 +- drivers/gpu/drm/i915/i915_drv.h | 7 +- drivers/gpu/drm/i915/i915_gem.c | 6 +- drivers/gpu/drm/i915/i915_globals.c | 1 - drivers/gpu/drm/i915/i915_globals.h | 1 - drivers/gpu/drm/i915/i915_gpu_error.c | 8 +- drivers/gpu/drm/i915/i915_memcpy.h | 34 - drivers/gpu/drm/i915/i915_scatterlist.c | 70 ++ drivers/gpu/drm/i915/i915_scatterlist.h | 20 +- drivers/gpu/drm/i915/i915_vma.c | 29 +- drivers/gpu/drm/i915/intel_memory_region.c | 181 ++-- drivers/gpu/drm/i915/intel_memory_region.h | 45 +- drivers/gpu/drm/i915/intel_region_ttm.c | 332 ++++++++ drivers/gpu/drm/i915/intel_region_ttm.h | 38 + drivers/gpu/drm/i915/selftests/i915_buddy.c | 789 ------------------ .../drm/i915/selftests/i915_mock_selftests.h | 1 - .../drm/i915/selftests/intel_memory_region.c | 140 +--- drivers/gpu/drm/i915/selftests/mock_region.c | 52 +- drivers/gpu/drm/ttm/ttm_bo.c | 63 +- drivers/gpu/drm/ttm/ttm_bo_util.c | 337 ++++---- drivers/gpu/drm/ttm/ttm_module.c | 35 + drivers/gpu/drm/ttm/ttm_resource.c | 166 ++++ drivers/gpu/drm/ttm/ttm_tt.c | 50 ++ include/drm/drm_memcpy.h | 47 ++ include/drm/ttm/ttm_bo_driver.h | 28 + include/drm/ttm/ttm_caching.h | 2 + include/drm/ttm/ttm_kmap_iter.h | 61 ++ include/drm/ttm/ttm_resource.h | 61 ++ include/drm/ttm/ttm_tt.h | 26 + 65 files changed, 2322 insertions(+), 2163 deletions(-) rename drivers/gpu/drm/{i915/i915_memcpy.c => drm_memcpy.c} (70%) create mode 100644 drivers/gpu/drm/i915/gem/i915_gem_ttm.c create mode 100644 drivers/gpu/drm/i915/gem/i915_gem_ttm.h delete mode 100644 drivers/gpu/drm/i915/i915_buddy.c delete mode 100644 drivers/gpu/drm/i915/i915_buddy.h delete mode 100644 drivers/gpu/drm/i915/i915_memcpy.h create mode 100644 drivers/gpu/drm/i915/intel_region_ttm.c create mode 100644 drivers/gpu/drm/i915/intel_region_ttm.h delete mode 100644 drivers/gpu/drm/i915/selftests/i915_buddy.c create mode 100644 include/drm/drm_memcpy.h create mode 100644 include/drm/ttm/ttm_kmap_iter.h