[PATCH v2 00/20] drm/amdgpu: use all SDMA instances for TTM clears and moves

Pierre-Eric Pelloux-Prayer
2025-11-13T16:07:03Z

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.

(The first patch of the series has already been merged through drm-misc but I'm
including it here to reduce conflicts)

v2:
- addressed comments from Christian
- dropped "drm/amdgpu: prepare amdgpu_fill_buffer to use N entities" and
"drm/amdgpu: use multiple entities in amdgpu_fill_buffer"
- added "drm/admgpu: handle resv dependencies in amdgpu_ttm_map_buffer",
"drm/amdgpu: round robin through clear_entities in amdgpu_fill_buffer"
- reworked how sdma rings/scheds are passed to amdgpu_ttm
v1: https://lists.freedesktop.org/archives/dri-devel/2025-November/534517.html

Pierre-Eric Pelloux-Prayer (20):
drm/amdgpu: give each kernel job a unique id
drm/ttm: rework pipelined eviction fence handling
drm/amdgpu: remove direct_submit arg from amdgpu_copy_buffer
drm/amdgpu: introduce amdgpu_ttm_buffer_entity
drm/amdgpu: pass the entity to use to ttm functions
drm/amdgpu: statically assign gart windows to ttm entities
drm/amdgpu: allocate multiple clear entities
drm/amdgpu: allocate multiple move entities
drm/amdgpu: pass optional dependency to amdgpu_fill_buffer
drm/admgpu: handle resv dependencies in amdgpu_ttm_map_buffer
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: introduce amdgpu_sdma_set_vm_pte_scheds
drm/amdgpu: pass all the sdma scheds to amdgpu_mman
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: use larger gart window when possible
drm/amdgpu: double AMDGPU_GTT_MAX_TRANSFER_SIZE

drivers/gpu/drm/amd/amdgpu/amdgpu.h | 4 +
drivers/gpu/drm/amd/amdgpu/amdgpu_benchmark.c | 9 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 5 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 8 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 2 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c | 3 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c | 25 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c | 6 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_job.c | 5 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_job.h | 19 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_jpeg.c | 3 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 14 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 435 +++++++++++-------
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | 50 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c | 3 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c | 5 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c | 8 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c | 6 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 26 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 2 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_vm_cpu.c | 4 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c | 4 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c | 12 +-
drivers/gpu/drm/amd/amdgpu/cik_sdma.c | 12 +-
drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c | 12 +-
drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c | 12 +-
drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c | 19 +-
drivers/gpu/drm/amd/amdgpu/sdma_v4_4_2.c | 19 +-
drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c | 18 +-
drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c | 18 +-
drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c | 12 +-
drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c | 12 +-
drivers/gpu/drm/amd/amdgpu/si_dma.c | 12 +-
drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c | 6 +-
drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c | 6 +-
drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 32 +-
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 +-
.../gpu/drm/ttm/tests/ttm_bo_validate_test.c | 11 +-
drivers/gpu/drm/ttm/tests/ttm_resource_test.c | 5 +-
drivers/gpu/drm/ttm/ttm_bo.c | 47 +-
drivers/gpu/drm/ttm/ttm_bo_util.c | 38 +-
drivers/gpu/drm/ttm/ttm_resource.c | 31 +-
include/drm/ttm/ttm_resource.h | 29 +-
45 files changed, 588 insertions(+), 436 deletions(-)

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2.43.0