| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Header file for CPUFreq ondemand governor and related code. |
| * |
| * Copyright (C) 2016, Intel Corporation |
| * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
| */ |
| |
| #include "cpufreq_governor.h" |
| |
| struct od_policy_dbs_info { |
| struct policy_dbs_info policy_dbs; |
| unsigned int freq_lo; |
| unsigned int freq_lo_delay_us; |
| unsigned int freq_hi_delay_us; |
| unsigned int sample_type:1; |
| }; |
| |
| static inline struct od_policy_dbs_info *to_dbs_info(struct policy_dbs_info *policy_dbs) |
| { |
| return container_of(policy_dbs, struct od_policy_dbs_info, policy_dbs); |
| } |
| |
| struct od_dbs_tuners { |
| unsigned int powersave_bias; |
| }; |
| |
| #ifdef CONFIG_X86 |
| #include <asm/cpu_device_id.h> |
| |
| /* |
| * Not all CPUs want IO time to be accounted as busy; this depends on |
| * how efficient idling at a higher frequency/voltage is. |
| * |
| * Pavel Machek says this is not so for various generations of AMD and |
| * old Intel systems. Mike Chan (android.com) claims this is also not |
| * true for ARM. |
| * |
| * Because of this, select a known series of Intel CPUs (Family 6 and |
| * later) by default, and leave all others up to the user. |
| */ |
| static inline bool od_should_io_be_busy(void) |
| { |
| return (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL && |
| boot_cpu_data.x86_vfm >= INTEL_PENTIUM_PRO); |
| } |
| #else |
| static inline bool od_should_io_be_busy(void) { return false; } |
| #endif |
