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| author |   Eric Huang <JinhuiEric.Huang@amd.com> | 2019-11-05 16:29:57 -0500 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2019-11-06 16:27:48 -0500 |
| commit | f88e2d1f8ec40854c684d73ecf1cf66d4c6dad35 (patch) | |
| tree | b96cf5554d977ce7eeda73cbe42cc0566dc485af | |
| parent | drm/amdgpu: add warning for GRBM 1-cycle delay issue in gfx9 (diff) | |
| download | linux-dev-f88e2d1f8ec40854c684d73ecf1cf66d4c6dad35.tar.xz linux-dev-f88e2d1f8ec40854c684d73ecf1cf66d4c6dad35.zip | |
drm/amdgpu: change read of GPU clock counter on Vega10 VF
Using unified VBIOS has performance drop in sriov environment.
The fix is switching to another register instead.
Signed-off-by: Eric Huang <JinhuiEric.Huang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c index 6d963f29187c..b1f3334e9c52 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c @@ -3884,9 +3884,22 @@ static uint64_t gfx_v9_0_get_gpu_clock_counter(struct amdgpu_device *adev) uint64_t clock; mutex_lock(&adev->gfx.gpu_clock_mutex); - WREG32_SOC15(GC, 0, mmRLC_CAPTURE_GPU_CLOCK_COUNT, 1); - clock = (uint64_t)RREG32_SOC15(GC, 0, mmRLC_GPU_CLOCK_COUNT_LSB) | - ((uint64_t)RREG32_SOC15(GC, 0, mmRLC_GPU_CLOCK_COUNT_MSB) << 32ULL); + if (adev->asic_type == CHIP_VEGA10 && amdgpu_sriov_runtime(adev)) { + uint32_t tmp, lsb, msb, i = 0; + do { + if (i != 0) + udelay(1); + tmp = RREG32_SOC15(GC, 0, mmRLC_REFCLOCK_TIMESTAMP_MSB); + lsb = RREG32_SOC15(GC, 0, mmRLC_REFCLOCK_TIMESTAMP_LSB); + msb = RREG32_SOC15(GC, 0, mmRLC_REFCLOCK_TIMESTAMP_MSB); + i++; + } while (unlikely(tmp != msb) && (i < adev->usec_timeout)); + clock = (uint64_t)lsb | ((uint64_t)msb << 32ULL); + } else { + WREG32_SOC15(GC, 0, mmRLC_CAPTURE_GPU_CLOCK_COUNT, 1); + clock = (uint64_t)RREG32_SOC15(GC, 0, mmRLC_GPU_CLOCK_COUNT_LSB) | + ((uint64_t)RREG32_SOC15(GC, 0, mmRLC_GPU_CLOCK_COUNT_MSB) << 32ULL); + } mutex_unlock(&adev->gfx.gpu_clock_mutex); return clock; } |