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drm/amdgpu/gfx11: update gpu_clock_counter logic

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commit d5aa417808 upstream.

This code was written prior to previous updates to this
logic for other chips.  The RSC registers are part of
SMUIO which is an always on block so there is no need
to disable gfxoff.  Additionally add the carryover and
preemption checks.

v2: rebase

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 6.1.y: 5591a051b8: drm/amdgpu: refine get gpu clock counter method
Cc: stable@vger.kernel.org # 6.2.y: 5591a051b8: drm/amdgpu: refine get gpu clock counter method
Cc: stable@vger.kernel.org # 6.3.y: 5591a051b8: drm/amdgpu: refine get gpu clock counter method
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alex Deucher
2023-04-10 12:02:29 -04:00
committed by Greg Kroah-Hartman
parent 055852074c
commit 76313a63f7
1 changed files with 7 additions and 4 deletions
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11
drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
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@@ -4643,24 +4643,27 @@ static uint64_t gfx_v11_0_get_gpu_clock_counter(struct amdgpu_device *adev)
uint64_t clock;
uint64_t clock_counter_lo, clock_counter_hi_pre, clock_counter_hi_after;
amdgpu_gfx_off_ctrl(adev, false);
mutex_lock(&adev->gfx.gpu_clock_mutex);
if (amdgpu_sriov_vf(adev)) {
amdgpu_gfx_off_ctrl(adev, false);
mutex_lock(&adev->gfx.gpu_clock_mutex);
clock_counter_hi_pre = (uint64_t)RREG32_SOC15(GC, 0, regCP_MES_MTIME_HI);
clock_counter_lo = (uint64_t)RREG32_SOC15(GC, 0, regCP_MES_MTIME_LO);
clock_counter_hi_after = (uint64_t)RREG32_SOC15(GC, 0, regCP_MES_MTIME_HI);
if (clock_counter_hi_pre != clock_counter_hi_after)
clock_counter_lo = (uint64_t)RREG32_SOC15(GC, 0, regCP_MES_MTIME_LO);
mutex_unlock(&adev->gfx.gpu_clock_mutex);
amdgpu_gfx_off_ctrl(adev, true);
} else {
preempt_disable();
clock_counter_hi_pre = (uint64_t)RREG32_SOC15(SMUIO, 0, regGOLDEN_TSC_COUNT_UPPER);
clock_counter_lo = (uint64_t)RREG32_SOC15(SMUIO, 0, regGOLDEN_TSC_COUNT_LOWER);
clock_counter_hi_after = (uint64_t)RREG32_SOC15(SMUIO, 0, regGOLDEN_TSC_COUNT_UPPER);
if (clock_counter_hi_pre != clock_counter_hi_after)
clock_counter_lo = (uint64_t)RREG32_SOC15(SMUIO, 0, regGOLDEN_TSC_COUNT_LOWER);
preempt_enable();
}
clock = clock_counter_lo | (clock_counter_hi_after << 32ULL);
mutex_unlock(&adev->gfx.gpu_clock_mutex);
amdgpu_gfx_off_ctrl(adev, true);
return clock;
}