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| author | Felix Kuehling <Felix.Kuehling@amd.com> | 2016-06-15 22:33:15 +0200 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-07-14 17:06:35 +0200 |
| commit | 763dbbfa5f678ceec59b81bc13bc9dc445920e9b (patch) | |
| tree | 0a8ce013a9ed839b0b9b5d381d9b673a01130577 | |
| parent | drm/amdgpu: Enable SDMA_CNTL.ATC_L1_ENABLE for SDMA on CZ (diff) | |
| download | linux-763dbbfa5f678ceec59b81bc13bc9dc445920e9b.tar.xz linux-763dbbfa5f678ceec59b81bc13bc9dc445920e9b.zip | |
drm/amdgpu: Enable SDMA context switching for CIK
Enable SDMA context switching on CIK (copied from sdma_v3_0.c).
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/cik_sdma.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/cik_sdma.c b/drivers/gpu/drm/amd/amdgpu/cik_sdma.c index c216e16826c9..4a9cea03f54f 100644 --- a/drivers/gpu/drm/amd/amdgpu/cik_sdma.c +++ b/drivers/gpu/drm/amd/amdgpu/cik_sdma.c @@ -342,6 +342,33 @@ static void cik_sdma_rlc_stop(struct amdgpu_device *adev) } /** + * cik_ctx_switch_enable - stop the async dma engines context switch + * + * @adev: amdgpu_device pointer + * @enable: enable/disable the DMA MEs context switch. + * + * Halt or unhalt the async dma engines context switch (VI). + */ +static void cik_ctx_switch_enable(struct amdgpu_device *adev, bool enable) +{ + u32 f32_cntl; + int i; + + for (i = 0; i < adev->sdma.num_instances; i++) { + f32_cntl = RREG32(mmSDMA0_CNTL + sdma_offsets[i]); + if (enable) { + f32_cntl = REG_SET_FIELD(f32_cntl, SDMA0_CNTL, + AUTO_CTXSW_ENABLE, 1); + } else { + f32_cntl = REG_SET_FIELD(f32_cntl, SDMA0_CNTL, + AUTO_CTXSW_ENABLE, 0); + } + + WREG32(mmSDMA0_CNTL + sdma_offsets[i], f32_cntl); + } +} + +/** * cik_sdma_enable - stop the async dma engines * * @adev: amdgpu_device pointer @@ -537,6 +564,8 @@ static int cik_sdma_start(struct amdgpu_device *adev) /* halt the engine before programing */ cik_sdma_enable(adev, false); + /* enable sdma ring preemption */ + cik_ctx_switch_enable(adev, true); /* start the gfx rings and rlc compute queues */ r = cik_sdma_gfx_resume(adev); @@ -984,6 +1013,7 @@ static int cik_sdma_hw_fini(void *handle) { struct amdgpu_device *adev = (struct amdgpu_device *)handle; + cik_ctx_switch_enable(adev, false); cik_sdma_enable(adev, false); return 0; |