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| author | Pixel Ding <[email protected]> | 2017-12-11 08:48:33 +0000 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2017-12-12 19:45:47 +0000 |
| commit | 2ffe31deb27579e2f2c9444e01f4d8abf385d145 (patch) | |
| tree | 30b712dbe3053fd00219ad99a36eceb2d2b5d5da /drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | |
| parent | drm/amdgpu: update one PDE at a time v2 (diff) | |
| download | kernel-2ffe31deb27579e2f2c9444e01f4d8abf385d145.tar.gz kernel-2ffe31deb27579e2f2c9444e01f4d8abf385d145.zip | |
drm/amdgpu: use polling mem to set SDMA3 wptr for VF
On Tonga VF, there're 2 sources updating wptr registers for
sdma3: 1) polling mem and 2) doorbell. When doorbell and polling
mem are both enabled on sdma3, there will be collision hit in
occasion between those two sources when ucode and h/w are doing
the updating on wptr register in parallel. Issue doesn't happen
on CP GFX/Compute since CP drops all doorbell writes when VF is
inactive. So enable polling mem and don't use doorbell for SDMA3.
Signed-off-by: Pixel Ding <[email protected]>
Reviewed-by: Monk Liu <[email protected]>
Reviewed-by: Christian König <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h')
0 files changed, 0 insertions, 0 deletions