236 lines
6.6 KiB
C
236 lines
6.6 KiB
C
/* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __ARCH_ARM_MACH_MSM_LPM_RESOURCES_H
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#define __ARCH_ARM_MACH_MSM_LPM_RESOURCES_H
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#include "pm.h"
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#include "test-lpm.h"
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enum {
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MSM_LPM_PXO_OFF,
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MSM_LPM_PXO_ON
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};
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enum {
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MSM_LPM_L2_CACHE_HSFS_OPEN,
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MSM_LPM_L2_CACHE_GDHS,
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MSM_LPM_L2_CACHE_RETENTION,
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MSM_LPM_L2_CACHE_ACTIVE,
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};
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struct msm_rpmrs_limits {
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uint32_t pxo;
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uint32_t l2_cache;
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uint32_t vdd_mem_upper_bound;
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uint32_t vdd_mem_lower_bound;
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uint32_t vdd_dig_upper_bound;
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uint32_t vdd_dig_lower_bound;
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bool irqs_detectable;
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bool gpio_detectable;
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uint32_t latency_us[NR_CPUS];
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uint32_t power[NR_CPUS];
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};
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struct msm_rpmrs_level {
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enum msm_pm_sleep_mode sleep_mode;
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struct msm_rpmrs_limits rs_limits;
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bool available;
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uint32_t latency_us;
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uint32_t steady_state_power;
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uint32_t energy_overhead;
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uint32_t time_overhead_us;
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};
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enum {
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MSM_LPM_STATE_ENTER = 0,
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MSM_LPM_STATE_EXIT = 1,
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};
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#define MSM_PM(field) MSM_LPM_##field
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/**
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* msm_pm_get_pxo() - get the limits for pxo
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* @limits: pointer to the msm_rpmrs_limits structure
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*
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* This function gets the limits to the resource pxo on
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* 8974
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*/
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uint32_t msm_pm_get_pxo(struct msm_rpmrs_limits *limits);
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/**
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* msm_pm_get_l2_cache() - get the limits for l2 cache
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* @limits: pointer to the msm_rpmrs_limits structure
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*
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* This function gets the limits to the resource l2 cache
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* on 8974
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*/
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uint32_t msm_pm_get_l2_cache(struct msm_rpmrs_limits *limits);
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/**
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* msm_pm_get_vdd_mem() - get the limits for pxo
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* @limits: pointer to the msm_rpmrs_limits structure
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*
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* This function gets the limits to the resource vdd mem
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* on 8974
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*/
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uint32_t msm_pm_get_vdd_mem(struct msm_rpmrs_limits *limits);
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/**
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* msm_pm_get_vdd_dig() - get the limits for vdd dig
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* @limits: pointer to the msm_rpmrs_limits structure
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*
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* This function gets the limits to the resource on 8974
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*/
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uint32_t msm_pm_get_vdd_dig(struct msm_rpmrs_limits *limits);
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/**
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* msm_lpm_get_xo_value() - get the enum value for xo
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* @node pointer to the device node
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* @key pxo property key
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* @xo_val xo enum value
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*/
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int msm_lpm_get_xo_value(struct device_node *node,
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char *key, uint32_t *xo_val);
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/**
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* msm_lpm_get_l2_cache_value() - get the enum value for l2 cache
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* @node pointer to the device node
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* @key l2 cache property key
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* @l2_val l2 mode enum value
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*/
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int msm_lpm_get_l2_cache_value(struct device_node *node,
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char *key, uint32_t *l2_val);
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/**
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* struct msm_lpm_sleep_data - abstraction to get sleep data
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* @limits: pointer to the msm_rpmrs_limits structure
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* @kernel_sleep: kernel sleep time as decided by the power calculation
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* algorithm
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*
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* This structure is an abstraction to get the limits and kernel sleep time
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* during enter sleep.
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*/
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struct msm_lpm_sleep_data {
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struct msm_rpmrs_limits *limits;
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uint32_t kernel_sleep;
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};
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/**
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* msm_lpm_register_notifier() - register for notifications
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* @cpu: cpu to debug
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* @level_iter: low power level index to debug
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* @nb: notifier block to callback on notifications
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* @is_latency_measure: is it latency measure
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*
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* This function sets the permitted level to the index of the
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* level under test and registers notifier for callback.
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*/
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int msm_lpm_register_notifier(int cpu, int level_iter,
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struct notifier_block *nb, bool is_latency_measure);
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/**
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* msm_lpm_unregister_notifier() - unregister from notifications
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* @cpu: cpu to debug
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* @nb: notifier block to callback on notifications
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*
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* This function sets the permitted level to a value one more than
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* available levels count which indicates that all levels are
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* permitted and it also unregisters notifier for callback.
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*/
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int msm_lpm_unregister_notifier(int cpu, struct notifier_block *nb);
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#ifdef CONFIG_MSM_RPM_SMD
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/**
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* msm_lpm_level_beyond_limit() - Check if the resources in a low power level
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* is beyond the limits of the driver votes received for those resources.This
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* function is used by lpm_levels to eliminate any low power level that cannot
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* be entered.
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*
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* @limits: pointer to the resource limits of a low power level.
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*
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* returns true if the resource limits are beyond driver resource votes.
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* false otherwise.
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*/
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bool msm_lpm_level_beyond_limit(struct msm_rpmrs_limits *limits);
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/**
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* msm_lpmrs_enter_sleep() - Enter sleep flushes the sleep votes of low power
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* resources to the RPM driver, also configure the MPM if needed depending
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* on the low power mode being entered. L2 low power mode is also set in
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* this function.
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* @sclk_count: wakeup counter for RPM.
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* @limits: pointer to the resource limits of the low power mode being entered.
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* @from_idle: bool to determine if this call being made as a part of
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* idle power collapse.
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* @notify_rpm: bool that informs if this is an RPM notified power collapse.
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*
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* returns 0 on success.
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*/
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int msm_lpmrs_enter_sleep(uint32_t sclk_count, struct msm_rpmrs_limits *limits,
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bool from_idle, bool notify_rpm);
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/**
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* msm_lpmrs_exit_sleep() - Exit sleep, reset the MPM and L2 mode.
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* @ limits: pointer to resource limits of the most recent low power mode.
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* @from_idle: bool to determine if this call being made as a part of
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* idle power collapse.
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* @notify_rpm: bool that informs if this is an RPM notified power collapse.
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* @collapsed: bool that informs if the Krait was power collapsed.
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*/
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void msm_lpmrs_exit_sleep(struct msm_rpmrs_limits *limits,
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bool from_idle, bool notify_rpm, bool collapsed);
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/**
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* msm_lpmrs_module_init() - Init function that parses the device tree to
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* get the low power resource attributes and registers with RPM driver for
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* callback notification.
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*
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* returns 0 on success.
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*/
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int __init msm_lpmrs_module_init(void);
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#else
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static inline bool msm_lpm_level_beyond_limit(struct msm_rpmrs_limits *limits)
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{
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return true;
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}
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static inline int msm_lpmrs_enter_sleep(uint32_t sclk_count,
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struct msm_rpmrs_limits *limits, bool from_idle, bool notify_rpm)
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{
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return 0;
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}
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static inline void msm_lpmrs_exit_sleep(struct msm_rpmrs_limits *limits,
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bool from_idle, bool notify_rpm, bool collapsed)
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{
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return;
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}
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static inline int __init msm_lpmrs_module_init(void)
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{
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return 0;
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}
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#endif /* CONFIG_MSM_RPM_SMD */
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#endif
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