| // 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 */ | |
| } |