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| author | Andres Rodriguez <andresx7@gmail.com> | 2017-02-24 20:50:20 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-05-31 16:49:00 -0400 |
| commit | ecd910eb1f091dd25f4a737a3bc50c0c8892eac7 (patch) | |
| tree | ddb1e1f3b922391c6a7c572a09fad4cf24dbdfac /drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | |
| parent | 894700f3b7e01e87954a94be6508205c7f024386 (diff) | |
| download | op-kernel-dev-ecd910eb1f091dd25f4a737a3bc50c0c8892eac7.zip op-kernel-dev-ecd910eb1f091dd25f4a737a3bc50c0c8892eac7.tar.gz | |
drm/amdgpu: workaround tonga HW bug in HQD programming sequence
Tonga based asics may experience hangs when an HQD's EOP parameters
are modified.
Workaround this HW issue by avoiding writes to these registers for
tonga asics.
Based on the following ROCm commit:
2a0fb8 - drm/amdgpu: Synchronize KFD HQD load protocol with CP scheduler
From the ROCm git repository:
https://github.com/RadeonOpenCompute/ROCK-Kernel-Driver.git
CC: Jay Cornwall <Jay.Cornwall@amd.com>
Suggested-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Andres Rodriguez <andresx7@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c index 29ec429a..69d9bbd 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c @@ -5070,7 +5070,21 @@ int gfx_v8_0_mqd_commit(struct amdgpu_device *adev, WREG32_FIELD(CP_PQ_WPTR_POLL_CNTL, EN, 0); /* program all HQD registers */ - for (mqd_reg = mmCP_HQD_VMID; mqd_reg <= mmCP_HQD_ERROR; mqd_reg++) + for (mqd_reg = mmCP_HQD_VMID; mqd_reg <= mmCP_HQD_EOP_CONTROL; mqd_reg++) + WREG32(mqd_reg, mqd_data[mqd_reg - mmCP_MQD_BASE_ADDR]); + + /* Tonga errata: EOP RPTR/WPTR should be left unmodified. + * This is safe since EOP RPTR==WPTR for any inactive HQD + * on ASICs that do not support context-save. + * EOP writes/reads can start anywhere in the ring. + */ + if (adev->asic_type != CHIP_TONGA) { + WREG32(mmCP_HQD_EOP_RPTR, mqd->cp_hqd_eop_rptr); + WREG32(mmCP_HQD_EOP_WPTR, mqd->cp_hqd_eop_wptr); + WREG32(mmCP_HQD_EOP_WPTR_MEM, mqd->cp_hqd_eop_wptr_mem); + } + + for (mqd_reg = mmCP_HQD_EOP_EVENTS; mqd_reg <= mmCP_HQD_ERROR; mqd_reg++) WREG32(mqd_reg, mqd_data[mqd_reg - mmCP_MQD_BASE_ADDR]); /* activate the HQD */ |
