[PATCH v4 00/12] drm/amdgpu: use all SDMA instances for TTM clears and moves

[Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>]

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/ddf055b80a544d6f36f77be5f0c6d3c80177d57c
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(-)

-- 
2.43.0