linux-imx

/*

 * Intel Running Average Power Limit (RAPL) Driver

 * Copyright (c) 2013, Intel Corporation.

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 *

 * This program is distributed in the hope it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

 * more details.

 *

 * You should have received a copy of the GNU General Public License along with

 * this program; if not, write to the Free Software Foundation, Inc.

 *

 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/list.h>

#include <linux/types.h>

#include <linux/device.h>

#include <linux/slab.h>

#include <linux/log2.h>

#include <linux/bitmap.h>

#include <linux/delay.h>

#include <linux/sysfs.h>

#include <linux/cpu.h>

#include <linux/powercap.h>

#include <linux/suspend.h>

#include <asm/iosf_mbi.h>

​

#include <asm/processor.h>

#include <asm/cpu_device_id.h>

#include <asm/intel-family.h>

​

/* Local defines */

#define MSR_PLATFORM_POWER_LIMIT    0x0000065C

​

/* bitmasks for RAPL MSRs, used by primitive access functions */

#define ENERGY_STATUS_MASK      0xffffffff

​

#define POWER_LIMIT1_MASK       0x7FFF

#define POWER_LIMIT1_ENABLE     BIT(15)

#define POWER_LIMIT1_CLAMP      BIT(16)

​

#define POWER_LIMIT2_MASK       (0x7FFFULL<<32)

#define POWER_LIMIT2_ENABLE     BIT_ULL(47)

#define POWER_LIMIT2_CLAMP      BIT_ULL(48)

#define POWER_PACKAGE_LOCK      BIT_ULL(63)

#define POWER_PP_LOCK           BIT(31)

​

#define TIME_WINDOW1_MASK       (0x7FULL<<17)

#define TIME_WINDOW2_MASK       (0x7FULL<<49)

​

#define POWER_UNIT_OFFSET   0

#define POWER_UNIT_MASK     0x0F

​

#define ENERGY_UNIT_OFFSET  0x08

#define ENERGY_UNIT_MASK    0x1F00

​

#define TIME_UNIT_OFFSET    0x10

#define TIME_UNIT_MASK      0xF0000

​

#define POWER_INFO_MAX_MASK     (0x7fffULL<<32)

#define POWER_INFO_MIN_MASK     (0x7fffULL<<16)

#define POWER_INFO_MAX_TIME_WIN_MASK     (0x3fULL<<48)

#define POWER_INFO_THERMAL_SPEC_MASK     0x7fff

​

#define PERF_STATUS_THROTTLE_TIME_MASK 0xffffffff

#define PP_POLICY_MASK         0x1F

​

/* Non HW constants */

#define RAPL_PRIMITIVE_DERIVED       BIT(1) /* not from raw data */

#define RAPL_PRIMITIVE_DUMMY         BIT(2)

​

#define TIME_WINDOW_MAX_MSEC 40000

#define TIME_WINDOW_MIN_MSEC 250

#define ENERGY_UNIT_SCALE    1000 /* scale from driver unit to powercap unit */

enum unit_type {

    ARBITRARY_UNIT, /* no translation */

    POWER_UNIT,

    ENERGY_UNIT,

    TIME_UNIT,

};

​

enum rapl_domain_type {

    RAPL_DOMAIN_PACKAGE, /* entire package/socket */

    RAPL_DOMAIN_PP0, /* core power plane */

    RAPL_DOMAIN_PP1, /* graphics uncore */