1d4e3d455SChris Wilson // SPDX-License-Identifier: MIT 2d4e3d455SChris Wilson /* 3d4e3d455SChris Wilson * Copyright © 2020 Intel Corporation 4d4e3d455SChris Wilson */ 5d4e3d455SChris Wilson 6d4e3d455SChris Wilson #include <asm/msr.h> 7d4e3d455SChris Wilson 8*a36a4749SChris Wilson #include "i915_drv.h" 9d4e3d455SChris Wilson #include "librapl.h" 10d4e3d455SChris Wilson librapl_supported(const struct drm_i915_private * i915)11*a36a4749SChris Wilsonbool librapl_supported(const struct drm_i915_private *i915) 12*a36a4749SChris Wilson { 13*a36a4749SChris Wilson /* Discrete cards require hwmon integration */ 14*a36a4749SChris Wilson if (IS_DGFX(i915)) 15*a36a4749SChris Wilson return false; 16*a36a4749SChris Wilson 17*a36a4749SChris Wilson return librapl_energy_uJ(); 18*a36a4749SChris Wilson } 19*a36a4749SChris Wilson librapl_energy_uJ(void)20d4e3d455SChris Wilsonu64 librapl_energy_uJ(void) 21d4e3d455SChris Wilson { 22d4e3d455SChris Wilson unsigned long long power; 23d4e3d455SChris Wilson u32 units; 24d4e3d455SChris Wilson 25d4e3d455SChris Wilson if (rdmsrl_safe(MSR_RAPL_POWER_UNIT, &power)) 26d4e3d455SChris Wilson return 0; 27d4e3d455SChris Wilson 28d4e3d455SChris Wilson units = (power & 0x1f00) >> 8; 29d4e3d455SChris Wilson 30d4e3d455SChris Wilson if (rdmsrl_safe(MSR_PP1_ENERGY_STATUS, &power)) 31d4e3d455SChris Wilson return 0; 32d4e3d455SChris Wilson 33d4e3d455SChris Wilson return (1000000 * power) >> units; /* convert to uJ */ 34d4e3d455SChris Wilson } 35