The drm/ttm patch modifies TTM to support multiple contexts for the pipelined moves.
Then amdgpu/ttm is updated to express dependencies between jobs explicitely, instead of relying on the ordering of execution guaranteed by the use of a single instance. With all of this in place, we can use multiple entities, with each having access to the available SDMA instances.
This rework also gives the opportunity to merge the clear functions into a single one and to optimize a bit GART usage.
Since v3 some patches have been already reviewed and merged separately: - https://lists.freedesktop.org/archives/amd-gfx/2026-January/137747.html - https://gitlab.freedesktop.org/drm/kernel/-/commit/ddf055b80a544d6f36f77be5f... This version depend on them.
v3: https://lists.freedesktop.org/archives/dri-devel/2025-November/537830.html
Pierre-Eric Pelloux-Prayer (12): drm/amdgpu: allocate clear entities dynamically drm/amdgpu: allocate move entities dynamically drm/amdgpu: round robin through clear_entities in amdgpu_fill_buffer drm/amdgpu: use TTM_NUM_MOVE_FENCES when reserving fences drm/amdgpu: use multiple entities in amdgpu_move_blit drm/amdgpu: pass all the sdma scheds to amdgpu_mman drm/amdgpu: only use working sdma schedulers for ttm drm/amdgpu: create multiple clear/move ttm entities drm/amdgpu: give ttm entities access to all the sdma scheds drm/amdgpu: get rid of amdgpu_ttm_clear_buffer drm/amdgpu: rename amdgpu_fill_buffer as amdgpu_ttm_clear_buffer drm/amdgpu: split amdgpu_ttm_set_buffer_funcs_status in 2 funcs
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 2 + drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 5 +- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 16 +- drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c | 4 +- drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 17 +- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 329 ++++++++++-------- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | 29 +- drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c | 6 +- drivers/gpu/drm/amd/amdgpu/cik_sdma.c | 13 +- drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c | 8 +- drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c | 8 +- drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c | 15 +- drivers/gpu/drm/amd/amdgpu/sdma_v4_4_2.c | 12 +- drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c | 11 +- drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c | 14 +- drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c | 5 +- drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c | 5 +- drivers/gpu/drm/amd/amdgpu/sdma_v7_1.c | 12 +- drivers/gpu/drm/amd/amdgpu/si_dma.c | 12 +- drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 5 +- drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 3 +- .../amd/display/amdgpu_dm/amdgpu_dm_plane.c | 6 +- .../drm/amd/display/amdgpu_dm/amdgpu_dm_wb.c | 6 +- 23 files changed, 300 insertions(+), 243 deletions(-)