drm/amdgpu: Add PASID management

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Allows assigning a PASID to a VM for identifying VMs involved in page
faults. The global PASID manager is also exported in the KFD
interface so that AMDGPU and KFD can share the PASID space.

PASIDs of different sizes can be requested. On APUs, the PASID size
is deterined by the capabilities of the IOMMU. So KFD must be able
to allocate PASIDs in a smaller range.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Felix Kuehling 2017-08-25 20:40:26 -04:00 • committed by Alex Deucher

parent ca290da8f6

commit 02208441cc

6 changed files with 97 additions and 4 deletions

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2

drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v7.c

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2

drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c

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2

drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c

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75

drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c

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14

drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h

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6

drivers/gpu/drm/amd/include/kgd_kfd_interface.h

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