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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>
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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@@ -95,6 +95,7 @@ extern int amdgpu_vm_size;
extern int amdgpu_vm_block_size;
extern int amdgpu_vm_fault_stop;
extern int amdgpu_vm_debug;
extern int amdgpu_vm_update_mode;
extern int amdgpu_sched_jobs;
extern int amdgpu_sched_hw_submission;
extern int amdgpu_no_evict;