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// SPDX-License-Identifier: MIT
/*
* Copyright © 2020 Intel Corporation
*/
#include <asm/msr.h>
#include "i915_drv.h"
#include "librapl.h"
bool librapl_supported(const struct drm_i915_private *i915)
{
/* Discrete cards require hwmon integration */
if (IS_DGFX(i915))
return false;
return librapl_energy_uJ();
}
u64 librapl_energy_uJ(void)
{
unsigned long long power;
u32 units;
if (rdmsrl_safe(MSR_RAPL_POWER_UNIT, &power))
return 0;
units = (power & 0x1f00) >> 8;
if (rdmsrl_safe(MSR_PP1_ENERGY_STATUS, &power))
return 0;
return (1000000 * power) >> units; /* convert to uJ */
}
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