[PATCH v3 0/3] drm/amdgpu: Explicit sync for GEM VA operations

[Friedrich Vock <friedrich.vock@gmx.de>]

In Vulkan, it is the application's responsibility to perform adequate
synchronization before a sparse unmap, replace or BO destroy operation.
This adds an option to AMDGPU_VA_OPs to disable redundant implicit sync
that happens on sparse unmap or replace operations.

This has seen a significant improvement in stutter in Forza Horizon 5
and Forza Horizon 4. (As games that had significant issues in sparse
binding related stutter).

Userspace changes for this new version can be found at [1][2], and a kernel
branch containing these patches can be found at [3].

[1] https://gitlab.freedesktop.org/pixelcluster/drm/-/commits/vm-explicit-sync
[2] https://gitlab.freedesktop.org/pixelcluster/mesa/-/commits/vm-explicit-sync
[3] https://gitlab.freedesktop.org/pixelcluster/linux/-/commits/amdgpu-vm-explicit-sync

v3 changes:
- Rebased onto current amd-staging-drm-next
- Added option to wait for drm_syncobjs instead of executing immediately

Tatsuyuki Ishi (3):
  drm/amdgpu: Don't implicit sync PRT maps.
  drm/amdgpu: Add optional explicit sync fences for GEM operations.
  drm/amdgpu: Bump amdgpu driver version.

 .../gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c  |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c       |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c       |  3 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c       | 76 ++++++++++++++++---
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.h    | 23 +++++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_trace.h     |  6 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_umsch_mm.c  |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c        | 68 +++++++++++------
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h        | 30 ++++----
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm_cpu.c    | 12 ++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm_pt.c     |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c   |  9 +++
 drivers/gpu/drm/amd/amdkfd/kfd_svm.c          | 18 ++---
 include/uapi/drm/amdgpu_drm.h                 |  7 ++
 14 files changed, 194 insertions(+), 66 deletions(-)

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2.46.0