drm/amdgpu: Add vm context module param

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Add VM update mode module param (amdgpu.vm_update_mode) that can used to
control how VM pde/pte are updated for Graphics and Compute.

BIT0 controls Graphics and BIT1 Compute.
 BIT0 [= 0] Graphics updated by SDMA [= 1] by CPU
 BIT1 [= 0] Compute updated by SDMA [= 1] by CPU

By default, only for large BAR system vm_update_mode = 2, indicating
that Graphics VMs will be updated via SDMA and Compute VMs will be
updated via CPU. And for all all other systems (by default)
vm_update_mode = 0

Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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This commit is contained in:

Harish Kasiviswanathan 2017-06-09 11:26:57 -04:00 • committed by Alex Deucher

parent b58c11314a

commit 9a4b7d4c76

5 changed files with 61 additions and 3 deletions

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1

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

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4

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

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3

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

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36

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

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20

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

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