| // 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 */ |
| } |
