a36a47490d
RAPL provides an on-package power measurements which does not encompass discrete graphics, so let's avoid using the igfx masurements when testing dgfx. Later we will abstract the simple librapl interface over hwmon so that we can verify basic power consumption scenarios. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Signed-off-by: Matthew Auld <matthew.auld@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210412090526.30547-3-matthew.auld@intel.com
35 lines
607 B
C
35 lines
607 B
C
// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2020 Intel Corporation
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*/
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#include <asm/msr.h>
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#include "i915_drv.h"
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#include "librapl.h"
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bool librapl_supported(const struct drm_i915_private *i915)
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{
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/* Discrete cards require hwmon integration */
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if (IS_DGFX(i915))
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return false;
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return librapl_energy_uJ();
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}
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u64 librapl_energy_uJ(void)
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{
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unsigned long long power;
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u32 units;
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if (rdmsrl_safe(MSR_RAPL_POWER_UNIT, &power))
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return 0;
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units = (power & 0x1f00) >> 8;
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if (rdmsrl_safe(MSR_PP1_ENERGY_STATUS, &power))
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return 0;
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return (1000000 * power) >> units; /* convert to uJ */
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}
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