// 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 (rdmsrq_safe(MSR_RAPL_POWER_UNIT, &power)) return 0; units = (power & 0x1f00) >> 8; if (rdmsrq_safe(MSR_PP1_ENERGY_STATUS, &power)) return 0; return (1000000 * power) >> units; /* convert to uJ */ }