tegrakernel/kernel/nvidia/include/linux/platform/tegra/dvfs.h

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2022-02-16 09:13:02 -06:00
/*
*
* Copyright (C) 2010 Google, Inc.
*
* Author:
* Colin Cross <ccross@google.com>
*
* Copyright (c) 2010-2016 NVIDIA CORPORATION. All rights reserved.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that 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.
*
*/
#ifndef _TEGRA_DVFS_H_
#define _TEGRA_DVFS_H_
#include <linux/of.h>
#include <linux/tegra_throttle.h>
#define MAX_DVFS_FREQS 40
#define MAX_DVFS_TABLES 80
#define DVFS_RAIL_STATS_TOP_BIN 100
#define MAX_THERMAL_LIMITS 8
#define MAX_THERMAL_RANGES (MAX_THERMAL_LIMITS + 1)
struct clk;
struct dvfs_rail;
/*
* dvfs_relationship between to rails, "from" and "to"
* when the rail changes, it will call dvfs_rail_update on the rails
* in the relationship_to list.
* when determining the voltage to set a rail to, it will consider each
* rail in the relationship_from list.
*/
struct dvfs_relationship {
struct dvfs_rail *to;
struct dvfs_rail *from;
int (*solve)(struct dvfs_rail *, struct dvfs_rail *);
struct list_head to_node; /* node in relationship_to list */
struct list_head from_node; /* node in relationship_from list */
bool solved_at_nominal;
bool solved_at_suspend;
};
struct rail_stats {
ktime_t time_at_mv[DVFS_RAIL_STATS_TOP_BIN + 1];
ktime_t last_update;
int last_index;
bool off;
int bin_uV;
};
struct rail_alignment {
int offset_uv;
int step_uv; /* Step voltage */
};
struct dvfs_rail {
const char *reg_id;
int min_millivolts;
int max_millivolts;
int reg_max_millivolts;
int nominal_millivolts; /* Max DVFS voltage */
int fixed_millivolts;
int override_millivolts;
int min_override_millivolts;
int override_unresolved;
int (*resolve_override)(int mv);
const int *therm_mv_floors;
const int *therm_mv_dfll_floors;
int therm_mv_floors_num;
const int *therm_mv_caps;
int therm_mv_caps_num;
const int *simon_vmin_offsets;
int simon_vmin_offs_num;
int simon_domain;
int step;
int step_up;
bool jmp_to_zero;
bool in_band_pm;
bool disabled;
bool updating;
bool resolving_to;
bool rate_set;
bool dt_reg_fixed;
bool dt_reg_pwm;
struct device_node *dt_node; /* device tree rail node */
struct list_head node; /* node in dvfs_rail_list */
struct list_head dvfs; /* list head of attached dvfs clocks */
struct list_head relationships_to;
struct list_head relationships_from;
struct regulator *reg;
int millivolts;
int new_millivolts;
int dbg_mv_offs;
int boot_millivolts;
int disable_millivolts;
int suspend_millivolts; /* voltage setting set during suspend */
bool suspended;
bool dfll_mode; /* DFLL mode ON/OFF */
bool dfll_mode_updating;
int therm_floor_idx; /* index of vmin thermal range */
int therm_cap_idx; /* index of vmax thermal range */
int therm_scale_idx; /* index of thermal DVFS or clk source range */
/* Trips for vmin cooling device */
struct tegra_cooling_device *vmin_cdev;
/* Trips for vmax cooling device */
struct tegra_cooling_device *vmax_cdev;
/* Trips for thermal DVFS cooling device */
struct tegra_cooling_device *vts_cdev;
/* Trips for clock source switch cooling device */
struct tegra_cooling_device *clk_switch_cdev;
/* Vmax capping method */
int (*apply_vmax_cap)(int *cap_idx, int new_idx, int cap_mv);
struct rail_alignment alignment;
struct rail_stats stats;
const char *version;
};
/*
* dfll_range -
* DFLL_RANGE_NONE : DFLL is not used
* DFLL_RANGE_ALL_RATES : DFLL is is used for all CPU rates
* DFLL_RANGE_HIGH_RATES : DFLL is used only for high rates
* above crossover with PLL dvfs curve
*/
enum dfll_range {
DFLL_RANGE_NONE = 0,
DFLL_RANGE_ALL_RATES,
DFLL_RANGE_HIGH_RATES,
};
/* DFLL usage is under thermal cooling device control */
#define TEGRA_USE_DFLL_CDEV_CNTRL 3
extern int tegra_override_dfll_range;
/* DVFS settings specific for DFLL clock source */
struct dvfs_dfll_data {
u32 tune0;
u32 tune0_high_mv;
u32 tune0_simon_mask;
u32 tune1;
bool tune0_low_at_cold;
unsigned long droop_rate_min;
unsigned long use_dfll_rate_min;
unsigned long out_rate_min;
unsigned long max_rate_boost;
/* Boot frequency if DFLL is enabled by boot-loader; zero otherwise */
unsigned long dfll_boot_khz;
int tune_high_min_millivolts;
int tune_high_margin_mv;
int min_millivolts;
enum dfll_range range;
void (*tune_trimmers)(bool trim_high);
unsigned int (*is_bypass_down)(void);
};
/* DVFS settings specific for PLL clock source */
struct dvfs_pll_data {
int min_millivolts;
};
struct dvfs {
const char *clk_name;
struct clk *clk;
int speedo_id;
int process_id;
/* Must be initialized before tegra_dvfs_init */
int freqs_mult;
unsigned long freqs[MAX_DVFS_FREQS];
const int *millivolts;
const int *peak_millivolts;
/* voltage settings as per DFLL clock source */
const int *dfll_millivolts;
struct dvfs_rail *dvfs_rail;
bool auto_dvfs;
bool can_override;
bool defer_override;
bool boost_table;
/* Filled in by tegra_dvfs_init */
int max_millivolts;
int num_freqs;
struct dvfs_dfll_data dfll_data;
/* Set if clock rate is adapted by h/w to voltage noise (noise-aware) */
bool na_dvfs;
/* Indicates thermal DVFS on/off */
bool therm_dvfs;
/* Maximum rate safe at minimum voltage across all thermal ranges */
unsigned long fmax_at_vmin_safe_t;
/*
* Current dvfs point = { index into V/F arrays, voltage, rate request }
* cur_index is invalid - set to MAX_DVFS_FREQS - if cur_rate and
* cur_millivolts are set to zero (may happen when dvfs rate is not set
* initially, or clock is disabled).
*/
int cur_index;
int cur_millivolts;
unsigned long cur_rate;
unsigned long *alt_freqs;
bool use_alt_freqs;
long dbg_hz_offs;
struct list_head node;
struct list_head debug_node;
struct list_head reg_node;
struct mutex *lock;
};
/* CVB coefficients */
struct cvb_dvfs_parameters {
int c0;
int c1;
int c2;
int c3;
int c4;
int c5;
};
struct cvb_dvfs_table {
unsigned long freq;
/* Coeffs for voltage calculation, when dfll clock source is selected */
struct cvb_dvfs_parameters cvb_dfll_param;
/* Coeffs for voltage calculation, when pll clock source is selected */
struct cvb_dvfs_parameters cvb_pll_param;
};
struct cvb_dvfs {
int speedo_id;
int process_id;
/* Tuning parameters for dfll */
struct dvfs_dfll_data dfll_tune_data;
/* tuning parameters for pll clock */
struct dvfs_pll_data pll_tune_data;
/* dvfs Max voltage */
int max_mv;
/* dvfs Max frequency */
unsigned long max_freq;
int freqs_mult;
/* scaling values for voltage calculation */
int speedo_scale;
int voltage_scale;
int thermal_scale;
struct cvb_dvfs_table cvb_vmin;
/* CVB table for various frequencies */
struct cvb_dvfs_table cvb_table[MAX_DVFS_FREQS];
/* Trips for minimal voltage settings per thermal ranges */
int vmin_trips_table[MAX_THERMAL_LIMITS];
int therm_floors_table[MAX_THERMAL_LIMITS];
/* Trips for thermal DVFS per thermal ranges */
int vts_trips_table[MAX_THERMAL_LIMITS];
/* Trips for clock source change per thermal ranges */
int clk_switch_trips[MAX_THERMAL_LIMITS];
};
#define cpu_cvb_dvfs cvb_dvfs
#define gpu_cvb_dvfs cvb_dvfs
#define core_cvb_dvfs cvb_dvfs
extern struct dvfs_rail *tegra_cpu_rail;
extern struct dvfs_rail *tegra_gpu_rail;
extern struct dvfs_rail *tegra_core_rail;
struct dvfs_data {
struct dvfs_rail *rail;
struct dvfs *tables;
int *millivolts;
unsigned int num_tables;
unsigned int num_voltages;
};
#ifdef CONFIG_OF
typedef int (*of_tegra_dvfs_init_cb_t)(struct device_node *);
int of_tegra_dvfs_init(const struct of_device_id *matches);
int of_tegra_dvfs_rail_node_parse(struct device_node *rail_dn,
struct dvfs_rail *rail);
int of_tegra_dvfs_rail_get_cdev_trips(
struct tegra_cooling_device *tegra_cdev, int *therm_trips_table,
int *therm_limits_table, struct rail_alignment *align, bool up);
#else
static inline int of_tegra_dvfs_init(const struct of_device_id *matches)
{ return -ENODATA; }
static inline int of_tegra_dvfs_rail_node_parse(struct device_node *rail_dn,
struct dvfs_rail *rail)
{ return -ENODEV; }
static inline int of_tegra_dvfs_rail_get_cdev_trips(
struct tegra_cooling_device *tegra_cdev, int *therm_trips_table,
int *therm_limits_table, struct rail_alignment *align, bool up)
{ return -ENODEV; }
#endif
void tegra21x_init_dvfs(void);
int dvfs_debugfs_init(struct dentry *clk_debugfs_root);
int tegra_dvfs_rail_connect_regulators(void);
int tegra_dvfs_rail_register_notifiers(void);
int tegra_dvfs_init_rails(struct dvfs_rail *dvfs_rails[], int n);
void tegra_dvfs_add_relationships(struct dvfs_relationship *rels, int n);
void tegra_dvfs_rail_enable(struct dvfs_rail *rail);
void tegra_dvfs_rail_disable(struct dvfs_rail *rail);
int tegra_dvfs_rail_power_up(struct dvfs_rail *rail);
int tegra_dvfs_rail_power_down(struct dvfs_rail *rail);
bool tegra_dvfs_is_rail_up(struct dvfs_rail *rail);
bool tegra_dvfs_rail_updating(struct clk *clk);
void tegra_dvfs_rail_off(struct dvfs_rail *rail, ktime_t now);
void tegra_dvfs_rail_on(struct dvfs_rail *rail, ktime_t now);
void tegra_dvfs_rail_pause(struct dvfs_rail *rail, ktime_t delta, bool on);
int tegra_dvfs_rail_set_mode(struct dvfs_rail *rail, unsigned int mode);
int tegra_dvfs_rail_register_notifier(struct dvfs_rail *rail,
struct notifier_block *nb);
int tegra_dvfs_rail_unregister_notifier(struct dvfs_rail *rail,
struct notifier_block *nb);
struct dvfs_rail *tegra_dvfs_get_rail_by_name(const char *reg_id);
int tegra_dvfs_rail_get_current_millivolts(struct dvfs_rail *rail);
int tegra_dvfs_override_core_cap_apply(int level);
int tegra_dvfs_therm_vmax_core_cap_apply(int *cap_idx, int new_idx, int level);
int tegra_dvfs_alt_freqs_install(struct dvfs *d, unsigned long *alt_freqs);
void tegra_dvfs_alt_freqs_install_always(
struct dvfs *d, unsigned long *alt_freqs);
int tegra_dvfs_replace_voltage_table(struct dvfs *d, const int *new_millivolts);
int tegra_dvfs_butterfly_throttle(struct clk *c1, unsigned long *rate1,
struct clk *c2, unsigned long *rate2);
int tegra_dvfs_dfll_mode_set(struct dvfs *d, unsigned long rate);
int tegra_dvfs_dfll_mode_clear(struct dvfs *d, unsigned long rate);
int tegra_clk_dfll_range_control(enum dfll_range use_dfll);
bool tegra_dvfs_is_dfll_scale(struct dvfs *d, unsigned long rate);
bool tegra_dvfs_is_dfll_range(struct dvfs *d, unsigned long rate);
int tegra_dvfs_swap_dfll_range(struct dvfs *d, int range, int *old_range);
int tegra_dvfs_set_dfll_range(struct dvfs *d, int range);
int tegra_dvfs_rail_set_reg_volatile(struct dvfs_rail *rail, bool set);
void tegra_clip_freqs(u32 *freqs, int *num_freqs, int freqs_mult,
const unsigned long *rates_ladder, int num_rates, bool up);
struct tegra_cooling_device *tegra_dvfs_get_cpu_vmax_cdev(void);
struct tegra_cooling_device *tegra_dvfs_get_cpu_vmin_cdev(void);
struct tegra_cooling_device *tegra_dvfs_get_core_vmax_cdev(void);
struct tegra_cooling_device *tegra_dvfs_get_core_vmin_cdev(void);
struct tegra_cooling_device *tegra_dvfs_get_gpu_vmin_cdev(void);
struct tegra_cooling_device *tegra_dvfs_get_gpu_vts_cdev(void);
struct tegra_cooling_device *tegra_dvfs_get_cpu_clk_switch_cdev(void);
void tegra_dvfs_rail_init_vmin_thermal_profile(
int *therm_trips_table, int *therm_floors_table,
struct dvfs_rail *rail, struct dvfs_dfll_data *d);
void tegra_dvfs_rail_init_vmax_thermal_profile(
int *therm_trips_table, int *therm_caps_table,
struct dvfs_rail *rail, struct dvfs_dfll_data *d);
int tegra_dvfs_rail_of_init_vmin_thermal_profile(
int *therm_trips_table, int *therm_floors_table,
struct dvfs_rail *rail, struct dvfs_dfll_data *d);
int tegra_dvfs_rail_of_init_vmax_thermal_profile(
int *therm_trips_table, int *therm_caps_table,
struct dvfs_rail *rail, struct dvfs_dfll_data *d);
int tegra_dvfs_rail_init_clk_switch_thermal_profile(
int *clk_switch_trips, struct dvfs_rail *rail);
int tegra_dvfs_rail_init_thermal_dvfs_trips(
int *therm_trips_table, struct dvfs_rail *rail);
int tegra_dvfs_init_thermal_dvfs_voltages(int *millivolts,
int *peak_millivolts, int freqs_num, int ranges_num, struct dvfs *d);
int tegra_dvfs_rail_dfll_mode_set_cold(struct dvfs_rail *rail,
struct clk *dfll_clk);
int tegra_dvfs_rail_get_thermal_floor(struct dvfs_rail *rail);
void tegra_dvfs_rail_register_vmax_cdev(struct dvfs_rail *rail);
#ifdef CONFIG_TEGRA_VDD_CORE_OVERRIDE
int tegra_dvfs_resolve_override(struct clk *c, unsigned long max_rate);
int tegra_dvfs_rail_get_override_floor(struct dvfs_rail *rail);
#else
static inline int tegra_dvfs_resolve_override(struct clk *c, unsigned long rate)
{ return 0; }
static inline int tegra_dvfs_rail_get_override_floor(struct dvfs_rail *rail)
{ return 0; }
#endif
static inline int tegra_dvfs_rail_disable_prepare(struct dvfs_rail *rail)
{ return 0; }
static inline int tegra_dvfs_rail_post_enable(struct dvfs_rail *rail)
{ return 0; }
bool tegra_dvfs_is_dfll_bypass(void);
static inline bool tegra_dvfs_rail_is_dfll_mode(struct dvfs_rail *rail)
{
return rail ? rail->dfll_mode : false;
}
static inline void tegra_dvfs_rail_mode_updating(struct dvfs_rail *rail,
bool updating)
{
if (rail)
rail->dfll_mode_updating = updating;
}
static inline void tegra_dvfs_set_dfll_tune_trimmers(
struct dvfs *d, void (*tune_trimmers)(bool trim_high))
{
if (d->dfll_data.tune_high_min_millivolts)
d->dfll_data.tune_trimmers = tune_trimmers;
}
#endif