[PATCH 0/8] Retry page fault handling for Vega10

[Felix Kuehling]

Rebased on the public drm-next-4.15-wip. Patch 8 from the WIP patch
series did not apply at all, because upstream KFD doesn't support
GPUVM yet.

The "lib: Closed hash table ..." change is updated and the same as
what I sent to LKML yesterday. Changes are mainly in the way the self
test is hooked up, Kconfig options and some checkpatch fixes. If it
takes too long to get accepted upstream, I could add it under
drivers/gpu/drm/amd/chash in the interim.

This is only compile tested on this branch. I can't do much more
because the upstream KFD doesn't support Vega10 and GPUVM yet. Someone
will have to add PASID support for graphics on top of this.

TODO:
* Finish upstreaming KFD
* Allocate PASIDs for graphics contexts
* Setup VMID-PASID mapping during graphics command submission
* Confirm that graphics page faults have the correct PASID in the IV

Felix Kuehling (8):
  drm/amdgpu: Fix error handling in amdgpu_vm_init
  drm/amdgpu: Add PASID management
  drm/radeon: Add PASID manager for KFD
  drm/amdkfd: Separate doorbell allocation from PASID
  drm/amdkfd: Use PASID manager from KGD
  drm/amdgpu: Add prescreening stage in IH processing
  lib: Closed hash table with low overhead
  drm/amdgpu: Track pending retry faults in IH and VM (v2)

 drivers/gpu/drm/Kconfig                           |   1 +
 drivers/gpu/drm/amd/amdgpu/amdgpu.h               |   2 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v7.c |   2 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c |   2 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c            |  82 +++
 drivers/gpu/drm/amd/amdgpu/amdgpu_ih.h            |  12 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c           |   2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c            |  84 ++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h            |  21 +-
 drivers/gpu/drm/amd/amdgpu/cik_ih.c               |  14 +
 drivers/gpu/drm/amd/amdgpu/cz_ih.c                |  14 +
 drivers/gpu/drm/amd/amdgpu/iceland_ih.c           |  14 +
 drivers/gpu/drm/amd/amdgpu/si_ih.c                |  14 +
 drivers/gpu/drm/amd/amdgpu/tonga_ih.c             |  14 +
 drivers/gpu/drm/amd/amdgpu/vega10_ih.c            |  90 ++++
 drivers/gpu/drm/amd/amdkfd/kfd_device.c           |   7 -
 drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c         |  50 +-
 drivers/gpu/drm/amd/amdkfd/kfd_module.c           |   6 -
 drivers/gpu/drm/amd/amdkfd/kfd_pasid.c            |  90 ++--
 drivers/gpu/drm/amd/amdkfd/kfd_priv.h             |  10 +-
 drivers/gpu/drm/amd/amdkfd/kfd_process.c          |   6 +
 drivers/gpu/drm/amd/include/kgd_kfd_interface.h   |   6 +
 drivers/gpu/drm/radeon/radeon_kfd.c               |  31 ++
 include/linux/chash.h                             | 358 +++++++++++++
 lib/Kconfig                                       |  24 +
 lib/Makefile                                      |   2 +
 lib/chash.c                                       | 622 ++++++++++++++++++++++
 27 files changed, 1489 insertions(+), 91 deletions(-)
 create mode 100644 include/linux/chash.h
 create mode 100644 lib/chash.c

-- 
2.7.4