Viewing file:  scmi_protocol.h (35 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* SCMI Message Protocol driver header
*
* Copyright (C) 2018-2021 ARM Ltd.
*/
#ifndef _LINUX_SCMI_PROTOCOL_H
#define _LINUX_SCMI_PROTOCOL_H
#include <linux/bitfield.h>
#include <linux/device.h>
#include <linux/notifier.h>
#include <linux/types.h>
#define SCMI_MAX_STR_SIZE 64
#define SCMI_SHORT_NAME_MAX_SIZE 16
#define SCMI_MAX_NUM_RATES 16
/**
* struct scmi_revision_info - version information structure
*
* @major_ver: Major ABI version. Change here implies risk of backward
* compatibility break.
* @minor_ver: Minor ABI version. Change here implies new feature addition,
* or compatible change in ABI.
* @num_protocols: Number of protocols that are implemented, excluding the
* base protocol.
* @num_agents: Number of agents in the system.
* @impl_ver: A vendor-specific implementation version.
* @vendor_id: A vendor identifier(Null terminated ASCII string)
* @sub_vendor_id: A sub-vendor identifier(Null terminated ASCII string)
*/
struct scmi_revision_info {
u16 major_ver;
u16 minor_ver;
u8 num_protocols;
u8 num_agents;
u32 impl_ver;
char vendor_id[SCMI_SHORT_NAME_MAX_SIZE];
char sub_vendor_id[SCMI_SHORT_NAME_MAX_SIZE];
};
struct scmi_clock_info {
char name[SCMI_MAX_STR_SIZE];
unsigned int enable_latency;
bool rate_discrete;
bool rate_changed_notifications;
bool rate_change_requested_notifications;
union {
struct {
int num_rates;
u64 rates[SCMI_MAX_NUM_RATES];
} list;
struct {
u64 min_rate;
u64 max_rate;
u64 step_size;
} range;
};
int num_parents;
u32 *parents;
};
enum scmi_power_scale {
SCMI_POWER_BOGOWATTS,
SCMI_POWER_MILLIWATTS,
SCMI_POWER_MICROWATTS
};
struct scmi_handle;
struct scmi_device;
struct scmi_protocol_handle;
/**
* struct scmi_clk_proto_ops - represents the various operations provided
* by SCMI Clock Protocol
*
* @count_get: get the count of clocks provided by SCMI
* @info_get: get the information of the specified clock
* @rate_get: request the current clock rate of a clock
* @rate_set: set the clock rate of a clock
* @enable: enables the specified clock
* @disable: disables the specified clock
* @state_get: get the status of the specified clock
* @config_oem_get: get the value of an OEM specific clock config
* @config_oem_set: set the value of an OEM specific clock config
* @parent_get: get the parent id of a clk
* @parent_set: set the parent of a clock
*/
struct scmi_clk_proto_ops {
int (*count_get)(const struct scmi_protocol_handle *ph);
const struct scmi_clock_info __must_check *(*info_get)
(const struct scmi_protocol_handle *ph, u32 clk_id);
int (*rate_get)(const struct scmi_protocol_handle *ph, u32 clk_id,
u64 *rate);
int (*rate_set)(const struct scmi_protocol_handle *ph, u32 clk_id,
u64 rate);
int (*enable)(const struct scmi_protocol_handle *ph, u32 clk_id,
bool atomic);
int (*disable)(const struct scmi_protocol_handle *ph, u32 clk_id,
bool atomic);
int (*state_get)(const struct scmi_protocol_handle *ph, u32 clk_id,
bool *enabled, bool atomic);
int (*config_oem_get)(const struct scmi_protocol_handle *ph, u32 clk_id,
u8 oem_type, u32 *oem_val, u32 *attributes,
bool atomic);
int (*config_oem_set)(const struct scmi_protocol_handle *ph, u32 clk_id,
u8 oem_type, u32 oem_val, bool atomic);
int (*parent_get)(const struct scmi_protocol_handle *ph, u32 clk_id, u32 *parent_id);
int (*parent_set)(const struct scmi_protocol_handle *ph, u32 clk_id, u32 parent_id);
};
struct scmi_perf_domain_info {
char name[SCMI_MAX_STR_SIZE];
bool set_perf;
};
/**
* struct scmi_perf_proto_ops - represents the various operations provided
* by SCMI Performance Protocol
*
* @num_domains_get: gets the number of supported performance domains
* @info_get: get the information of a performance domain
* @limits_set: sets limits on the performance level of a domain
* @limits_get: gets limits on the performance level of a domain
* @level_set: sets the performance level of a domain
* @level_get: gets the performance level of a domain
* @transition_latency_get: gets the DVFS transition latency for a given device
* @device_opps_add: adds all the OPPs for a given device
* @freq_set: sets the frequency for a given device using sustained frequency
* to sustained performance level mapping
* @freq_get: gets the frequency for a given device using sustained frequency
* to sustained performance level mapping
* @est_power_get: gets the estimated power cost for a given performance domain
* at a given frequency
* @fast_switch_possible: indicates if fast DVFS switching is possible or not
* for a given device
* @power_scale_mw_get: indicates if the power values provided are in milliWatts
* or in some other (abstract) scale
*/
struct scmi_perf_proto_ops {
int (*num_domains_get)(const struct scmi_protocol_handle *ph);
const struct scmi_perf_domain_info __must_check *(*info_get)
(const struct scmi_protocol_handle *ph, u32 domain);
int (*limits_set)(const struct scmi_protocol_handle *ph, u32 domain,
u32 max_perf, u32 min_perf);
int (*limits_get)(const struct scmi_protocol_handle *ph, u32 domain,
u32 *max_perf, u32 *min_perf);
int (*level_set)(const struct scmi_protocol_handle *ph, u32 domain,
u32 level, bool poll);
int (*level_get)(const struct scmi_protocol_handle *ph, u32 domain,
u32 *level, bool poll);
int (*transition_latency_get)(const struct scmi_protocol_handle *ph,
u32 domain);
int (*device_opps_add)(const struct scmi_protocol_handle *ph,
struct device *dev, u32 domain);
int (*freq_set)(const struct scmi_protocol_handle *ph, u32 domain,
unsigned long rate, bool poll);
int (*freq_get)(const struct scmi_protocol_handle *ph, u32 domain,
unsigned long *rate, bool poll);
int (*est_power_get)(const struct scmi_protocol_handle *ph, u32 domain,
unsigned long *rate, unsigned long *power);
bool (*fast_switch_possible)(const struct scmi_protocol_handle *ph,
u32 domain);
enum scmi_power_scale (*power_scale_get)(const struct scmi_protocol_handle *ph);
};
/**
* struct scmi_power_proto_ops - represents the various operations provided
* by SCMI Power Protocol
*
* @num_domains_get: get the count of power domains provided by SCMI
* @name_get: gets the name of a power domain
* @state_set: sets the power state of a power domain
* @state_get: gets the power state of a power domain
*/
struct scmi_power_proto_ops {
int (*num_domains_get)(const struct scmi_protocol_handle *ph);
const char *(*name_get)(const struct scmi_protocol_handle *ph,
u32 domain);
#define SCMI_POWER_STATE_TYPE_SHIFT 30
#define SCMI_POWER_STATE_ID_MASK (BIT(28) - 1)
#define SCMI_POWER_STATE_PARAM(type, id) \
((((type) & BIT(0)) << SCMI_POWER_STATE_TYPE_SHIFT) | \
((id) & SCMI_POWER_STATE_ID_MASK))
#define SCMI_POWER_STATE_GENERIC_ON SCMI_POWER_STATE_PARAM(0, 0)
#define SCMI_POWER_STATE_GENERIC_OFF SCMI_POWER_STATE_PARAM(1, 0)
int (*state_set)(const struct scmi_protocol_handle *ph, u32 domain,
u32 state);
int (*state_get)(const struct scmi_protocol_handle *ph, u32 domain,
u32 *state);
};
/**
* struct scmi_sensor_reading - represent a timestamped read
*
* Used by @reading_get_timestamped method.
*
* @value: The signed value sensor read.
* @timestamp: An unsigned timestamp for the sensor read, as provided by
* SCMI platform. Set to zero when not available.
*/
struct scmi_sensor_reading {
long long value;
unsigned long long timestamp;
};
/**
* struct scmi_range_attrs - specifies a sensor or axis values' range
* @min_range: The minimum value which can be represented by the sensor/axis.
* @max_range: The maximum value which can be represented by the sensor/axis.
*/
struct scmi_range_attrs {
long long min_range;
long long max_range;
};
/**
* struct scmi_sensor_axis_info - describes one sensor axes
* @id: The axes ID.
* @type: Axes type. Chosen amongst one of @enum scmi_sensor_class.
* @scale: Power-of-10 multiplier applied to the axis unit.
* @name: NULL-terminated string representing axes name as advertised by
* SCMI platform.
* @extended_attrs: Flag to indicate the presence of additional extended
* attributes for this axes.
* @resolution: Extended attribute representing the resolution of the axes.
* Set to 0 if not reported by this axes.
* @exponent: Extended attribute representing the power-of-10 multiplier that
* is applied to the resolution field. Set to 0 if not reported by
* this axes.
* @attrs: Extended attributes representing minimum and maximum values
* measurable by this axes. Set to 0 if not reported by this sensor.
*/
struct scmi_sensor_axis_info {
unsigned int id;
unsigned int type;
int scale;
char name[SCMI_MAX_STR_SIZE];
bool extended_attrs;
unsigned int resolution;
int exponent;
struct scmi_range_attrs attrs;
};
/**
* struct scmi_sensor_intervals_info - describes number and type of available
* update intervals
* @segmented: Flag for segmented intervals' representation. When True there
* will be exactly 3 intervals in @desc, with each entry
* representing a member of a segment in this order:
* {lowest update interval, highest update interval, step size}
* @count: Number of intervals described in @desc.
* @desc: Array of @count interval descriptor bitmask represented as detailed in
* the SCMI specification: it can be accessed using the accompanying
* macros.
* @prealloc_pool: A minimal preallocated pool of desc entries used to avoid
* lesser-than-64-bytes dynamic allocation for small @count
* values.
*/
struct scmi_sensor_intervals_info {
bool segmented;
unsigned int count;
#define SCMI_SENS_INTVL_SEGMENT_LOW 0
#define SCMI_SENS_INTVL_SEGMENT_HIGH 1
#define SCMI_SENS_INTVL_SEGMENT_STEP 2
unsigned int *desc;
#define SCMI_SENS_INTVL_GET_SECS(x) FIELD_GET(GENMASK(20, 5), (x))
#define SCMI_SENS_INTVL_GET_EXP(x) \
({ \
int __signed_exp = FIELD_GET(GENMASK(4, 0), (x)); \
\
if (__signed_exp & BIT(4)) \
__signed_exp |= GENMASK(31, 5); \
__signed_exp; \
})
#define SCMI_MAX_PREALLOC_POOL 16
unsigned int prealloc_pool[SCMI_MAX_PREALLOC_POOL];
};
/**
* struct scmi_sensor_info - represents information related to one of the
* available sensors.
* @id: Sensor ID.
* @type: Sensor type. Chosen amongst one of @enum scmi_sensor_class.
* @scale: Power-of-10 multiplier applied to the sensor unit.
* @num_trip_points: Number of maximum configurable trip points.
* @async: Flag for asynchronous read support.
* @update: Flag for continuouos update notification support.
* @timestamped: Flag for timestamped read support.
* @tstamp_scale: Power-of-10 multiplier applied to the sensor timestamps to
* represent it in seconds.
* @num_axis: Number of supported axis if any. Reported as 0 for scalar sensors.
* @axis: Pointer to an array of @num_axis descriptors.
* @intervals: Descriptor of available update intervals.
* @sensor_config: A bitmask reporting the current sensor configuration as
* detailed in the SCMI specification: it can accessed and
* modified through the accompanying macros.
* @name: NULL-terminated string representing sensor name as advertised by
* SCMI platform.
* @extended_scalar_attrs: Flag to indicate the presence of additional extended
* attributes for this sensor.
* @sensor_power: Extended attribute representing the average power
* consumed by the sensor in microwatts (uW) when it is active.
* Reported here only for scalar sensors.
* Set to 0 if not reported by this sensor.
* @resolution: Extended attribute representing the resolution of the sensor.
* Reported here only for scalar sensors.
* Set to 0 if not reported by this sensor.
* @exponent: Extended attribute representing the power-of-10 multiplier that is
* applied to the resolution field.
* Reported here only for scalar sensors.
* Set to 0 if not reported by this sensor.
* @scalar_attrs: Extended attributes representing minimum and maximum
* measurable values by this sensor.
* Reported here only for scalar sensors.
* Set to 0 if not reported by this sensor.
*/
struct scmi_sensor_info {
unsigned int id;
unsigned int type;
int scale;
unsigned int num_trip_points;
bool async;
bool update;
bool timestamped;
int tstamp_scale;
unsigned int num_axis;
struct scmi_sensor_axis_info *axis;
struct scmi_sensor_intervals_info intervals;
unsigned int sensor_config;
#define SCMI_SENS_CFG_UPDATE_SECS_MASK GENMASK(31, 16)
#define SCMI_SENS_CFG_GET_UPDATE_SECS(x) \
FIELD_GET(SCMI_SENS_CFG_UPDATE_SECS_MASK, (x))
#define SCMI_SENS_CFG_UPDATE_EXP_MASK GENMASK(15, 11)
#define SCMI_SENS_CFG_GET_UPDATE_EXP(x) \
({ \
int __signed_exp = \
FIELD_GET(SCMI_SENS_CFG_UPDATE_EXP_MASK, (x)); \
\
if (__signed_exp & BIT(4)) \
__signed_exp |= GENMASK(31, 5); \
__signed_exp; \
})
#define SCMI_SENS_CFG_ROUND_MASK GENMASK(10, 9)
#define SCMI_SENS_CFG_ROUND_AUTO 2
#define SCMI_SENS_CFG_ROUND_UP 1
#define SCMI_SENS_CFG_ROUND_DOWN 0
#define SCMI_SENS_CFG_TSTAMP_ENABLED_MASK BIT(1)
#define SCMI_SENS_CFG_TSTAMP_ENABLE 1
#define SCMI_SENS_CFG_TSTAMP_DISABLE 0
#define SCMI_SENS_CFG_IS_TSTAMP_ENABLED(x) \
FIELD_GET(SCMI_SENS_CFG_TSTAMP_ENABLED_MASK, (x))
#define SCMI_SENS_CFG_SENSOR_ENABLED_MASK BIT(0)
#define SCMI_SENS_CFG_SENSOR_ENABLE 1
#define SCMI_SENS_CFG_SENSOR_DISABLE 0
char name[SCMI_MAX_STR_SIZE];
#define SCMI_SENS_CFG_IS_ENABLED(x) FIELD_GET(BIT(0), (x))
bool extended_scalar_attrs;
unsigned int sensor_power;
unsigned int resolution;
int exponent;
struct scmi_range_attrs scalar_attrs;
};
/*
* Partial list from Distributed Management Task Force (DMTF) specification:
* DSP0249 (Platform Level Data Model specification)
*/
enum scmi_sensor_class {
NONE = 0x0,
UNSPEC = 0x1,
TEMPERATURE_C = 0x2,
TEMPERATURE_F = 0x3,
TEMPERATURE_K = 0x4,
VOLTAGE = 0x5,
CURRENT = 0x6,
POWER = 0x7,
ENERGY = 0x8,
CHARGE = 0x9,
VOLTAMPERE = 0xA,
NITS = 0xB,
LUMENS = 0xC,
LUX = 0xD,
CANDELAS = 0xE,
KPA = 0xF,
PSI = 0x10,
NEWTON = 0x11,
CFM = 0x12,
RPM = 0x13,
HERTZ = 0x14,
SECS = 0x15,
MINS = 0x16,
HOURS = 0x17,
DAYS = 0x18,
WEEKS = 0x19,
MILS = 0x1A,
INCHES = 0x1B,
FEET = 0x1C,
CUBIC_INCHES = 0x1D,
CUBIC_FEET = 0x1E,
METERS = 0x1F,
CUBIC_CM = 0x20,
CUBIC_METERS = 0x21,
LITERS = 0x22,
FLUID_OUNCES = 0x23,
RADIANS = 0x24,
STERADIANS = 0x25,
REVOLUTIONS = 0x26,
CYCLES = 0x27,
GRAVITIES = 0x28,
OUNCES = 0x29,
POUNDS = 0x2A,
FOOT_POUNDS = 0x2B,
OUNCE_INCHES = 0x2C,
GAUSS = 0x2D,
GILBERTS = 0x2E,
HENRIES = 0x2F,
FARADS = 0x30,
OHMS = 0x31,
SIEMENS = 0x32,
MOLES = 0x33,
BECQUERELS = 0x34,
PPM = 0x35,
DECIBELS = 0x36,
DBA = 0x37,
DBC = 0x38,
GRAYS = 0x39,
SIEVERTS = 0x3A,
COLOR_TEMP_K = 0x3B,
BITS = 0x3C,
BYTES = 0x3D,
WORDS = 0x3E,
DWORDS = 0x3F,
QWORDS = 0x40,
PERCENTAGE = 0x41,
PASCALS = 0x42,
COUNTS = 0x43,
GRAMS = 0x44,
NEWTON_METERS = 0x45,
HITS = 0x46,
MISSES = 0x47,
RETRIES = 0x48,
OVERRUNS = 0x49,
UNDERRUNS = 0x4A,
COLLISIONS = 0x4B,
PACKETS = 0x4C,
MESSAGES = 0x4D,
CHARS = 0x4E,
ERRORS = 0x4F,
CORRECTED_ERRS = 0x50,
UNCORRECTABLE_ERRS = 0x51,
SQ_MILS = 0x52,
SQ_INCHES = 0x53,
SQ_FEET = 0x54,
SQ_CM = 0x55,
SQ_METERS = 0x56,
RADIANS_SEC = 0x57,
BPM = 0x58,
METERS_SEC_SQUARED = 0x59,
METERS_SEC = 0x5A,
CUBIC_METERS_SEC = 0x5B,
MM_MERCURY = 0x5C,
RADIANS_SEC_SQUARED = 0x5D,
OEM_UNIT = 0xFF
};
/**
* struct scmi_sensor_proto_ops - represents the various operations provided
* by SCMI Sensor Protocol
*
* @count_get: get the count of sensors provided by SCMI
* @info_get: get the information of the specified sensor
* @trip_point_config: selects and configures a trip-point of interest
* @reading_get: gets the current value of the sensor
* @reading_get_timestamped: gets the current value and timestamp, when
* available, of the sensor. (as of v3.0 spec)
* Supports multi-axis sensors for sensors which
* supports it and if the @reading array size of
* @count entry equals the sensor num_axis
* @config_get: Get sensor current configuration
* @config_set: Set sensor current configuration
*/
struct scmi_sensor_proto_ops {
int (*count_get)(const struct scmi_protocol_handle *ph);
const struct scmi_sensor_info __must_check *(*info_get)
(const struct scmi_protocol_handle *ph, u32 sensor_id);
int (*trip_point_config)(const struct scmi_protocol_handle *ph,
u32 sensor_id, u8 trip_id, u64 trip_value);
int (*reading_get)(const struct scmi_protocol_handle *ph, u32 sensor_id,
u64 *value);
int (*reading_get_timestamped)(const struct scmi_protocol_handle *ph,
u32 sensor_id, u8 count,
struct scmi_sensor_reading *readings);
int (*config_get)(const struct scmi_protocol_handle *ph,
u32 sensor_id, u32 *sensor_config);
int (*config_set)(const struct scmi_protocol_handle *ph,
u32 sensor_id, u32 sensor_config);
};
/**
* struct scmi_reset_proto_ops - represents the various operations provided
* by SCMI Reset Protocol
*
* @num_domains_get: get the count of reset domains provided by SCMI
* @name_get: gets the name of a reset domain
* @latency_get: gets the reset latency for the specified reset domain
* @reset: resets the specified reset domain
* @assert: explicitly assert reset signal of the specified reset domain
* @deassert: explicitly deassert reset signal of the specified reset domain
*/
struct scmi_reset_proto_ops {
int (*num_domains_get)(const struct scmi_protocol_handle *ph);
const char *(*name_get)(const struct scmi_protocol_handle *ph,
u32 domain);
int (*latency_get)(const struct scmi_protocol_handle *ph, u32 domain);
int (*reset)(const struct scmi_protocol_handle *ph, u32 domain);
int (*assert)(const struct scmi_protocol_handle *ph, u32 domain);
int (*deassert)(const struct scmi_protocol_handle *ph, u32 domain);
};
enum scmi_voltage_level_mode {
SCMI_VOLTAGE_LEVEL_SET_AUTO,
SCMI_VOLTAGE_LEVEL_SET_SYNC,
};
/**
* struct scmi_voltage_info - describe one available SCMI Voltage Domain
*
* @id: the domain ID as advertised by the platform
* @segmented: defines the layout of the entries of array @levels_uv.
* - when True the entries are to be interpreted as triplets,
* each defining a segment representing a range of equally
* space voltages: <lowest_volts>, <highest_volt>, <step_uV>
* - when False the entries simply represent a single discrete
* supported voltage level
* @negative_volts_allowed: True if any of the entries of @levels_uv represent
* a negative voltage.
* @async_level_set: True when the voltage domain supports asynchronous level
* set commands.
* @name: name assigned to the Voltage Domain by platform
* @num_levels: number of total entries in @levels_uv.
* @levels_uv: array of entries describing the available voltage levels for
* this domain.
*/
struct scmi_voltage_info {
unsigned int id;
bool segmented;
bool negative_volts_allowed;
bool async_level_set;
char name[SCMI_MAX_STR_SIZE];
unsigned int num_levels;
#define SCMI_VOLTAGE_SEGMENT_LOW 0
#define SCMI_VOLTAGE_SEGMENT_HIGH 1
#define SCMI_VOLTAGE_SEGMENT_STEP 2
int *levels_uv;
};
/**
* struct scmi_voltage_proto_ops - represents the various operations provided
* by SCMI Voltage Protocol
*
* @num_domains_get: get the count of voltage domains provided by SCMI
* @info_get: get the information of the specified domain
* @config_set: set the config for the specified domain
* @config_get: get the config of the specified domain
* @level_set: set the voltage level for the specified domain
* @level_get: get the voltage level of the specified domain
*/
struct scmi_voltage_proto_ops {
int (*num_domains_get)(const struct scmi_protocol_handle *ph);
const struct scmi_voltage_info __must_check *(*info_get)
(const struct scmi_protocol_handle *ph, u32 domain_id);
int (*config_set)(const struct scmi_protocol_handle *ph, u32 domain_id,
u32 config);
#define SCMI_VOLTAGE_ARCH_STATE_OFF 0x0
#define SCMI_VOLTAGE_ARCH_STATE_ON 0x7
int (*config_get)(const struct scmi_protocol_handle *ph, u32 domain_id,
u32 *config);
int (*level_set)(const struct scmi_protocol_handle *ph, u32 domain_id,
enum scmi_voltage_level_mode mode, s32 volt_uV);
int (*level_get)(const struct scmi_protocol_handle *ph, u32 domain_id,
s32 *volt_uV);
};
/**
* struct scmi_powercap_info - Describe one available Powercap domain
*
* @id: Domain ID as advertised by the platform.
* @notify_powercap_cap_change: CAP change notification support.
* @notify_powercap_measurement_change: MEASUREMENTS change notifications
* support.
* @async_powercap_cap_set: Asynchronous CAP set support.
* @powercap_cap_config: CAP configuration support.
* @powercap_monitoring: Monitoring (measurements) support.
* @powercap_pai_config: PAI configuration support.
* @powercap_scale_mw: Domain reports power data in milliwatt units.
* @powercap_scale_uw: Domain reports power data in microwatt units.
* Note that, when both @powercap_scale_mw and
* @powercap_scale_uw are set to false, the domain
* reports power data on an abstract linear scale.
* @name: name assigned to the Powercap Domain by platform.
* @min_pai: Minimum configurable PAI.
* @max_pai: Maximum configurable PAI.
* @pai_step: Step size between two consecutive PAI values.
* @min_power_cap: Minimum configurable CAP.
* @max_power_cap: Maximum configurable CAP.
* @power_cap_step: Step size between two consecutive CAP values.
* @sustainable_power: Maximum sustainable power consumption for this domain
* under normal conditions.
* @accuracy: The accuracy with which the power is measured and reported in
* integral multiples of 0.001 percent.
* @parent_id: Identifier of the containing parent power capping domain, or the
* value 0xFFFFFFFF if this powercap domain is a root domain not
* contained in any other domain.
*/
struct scmi_powercap_info {
unsigned int id;
bool notify_powercap_cap_change;
bool notify_powercap_measurement_change;
bool async_powercap_cap_set;
bool powercap_cap_config;
bool powercap_monitoring;
bool powercap_pai_config;
bool powercap_scale_mw;
bool powercap_scale_uw;
bool fastchannels;
char name[SCMI_MAX_STR_SIZE];
unsigned int min_pai;
unsigned int max_pai;
unsigned int pai_step;
unsigned int min_power_cap;
unsigned int max_power_cap;
unsigned int power_cap_step;
unsigned int sustainable_power;
unsigned int accuracy;
#define SCMI_POWERCAP_ROOT_ZONE_ID 0xFFFFFFFFUL
unsigned int parent_id;
struct scmi_fc_info *fc_info;
};
/**
* struct scmi_powercap_proto_ops - represents the various operations provided
* by SCMI Powercap Protocol
*
* @num_domains_get: get the count of powercap domains provided by SCMI.
* @info_get: get the information for the specified domain.
* @cap_get: get the current CAP value for the specified domain.
* On SCMI platforms supporting powercap zone disabling, this could
* report a zero value for a zone where powercapping is disabled.
* @cap_set: set the CAP value for the specified domain to the provided value;
* if the domain supports setting the CAP with an asynchronous command
* this request will finally trigger an asynchronous transfer, but, if
* @ignore_dresp here is set to true, this call will anyway return
* immediately without waiting for the related delayed response.
* Note that the powercap requested value must NOT be zero, even if
* the platform supports disabling a powercap by setting its cap to
* zero (since SCMI v3.2): there are dedicated operations that should
* be used for that. (@cap_enable_set/get)
* @cap_enable_set: enable or disable the powercapping on the specified domain,
* if supported by the SCMI platform implementation.
* Note that, by the SCMI specification, the platform can
* silently ignore our disable request and decide to enforce
* anyway some other powercap value requested by another agent
* on the system: for this reason @cap_get and @cap_enable_get
* will always report the final platform view of the powercaps.
* @cap_enable_get: get the current CAP enable status for the specified domain.
* @pai_get: get the current PAI value for the specified domain.
* @pai_set: set the PAI value for the specified domain to the provided value.
* @measurements_get: retrieve the current average power measurements for the
* specified domain and the related PAI upon which is
* calculated.
* @measurements_threshold_set: set the desired low and high power thresholds
* to be used when registering for notification
* of type POWERCAP_MEASUREMENTS_NOTIFY with this
* powercap domain.
* Note that this must be called at least once
* before registering any callback with the usual
* @scmi_notify_ops; moreover, in case this method
* is called with measurement notifications already
* enabled it will also trigger, transparently, a
* proper update of the power thresholds configured
* in the SCMI backend server.
* @measurements_threshold_get: get the currently configured low and high power
* thresholds used when registering callbacks for
* notification POWERCAP_MEASUREMENTS_NOTIFY.
*/
struct scmi_powercap_proto_ops {
int (*num_domains_get)(const struct scmi_protocol_handle *ph);
const struct scmi_powercap_info __must_check *(*info_get)
(const struct scmi_protocol_handle *ph, u32 domain_id);
int (*cap_get)(const struct scmi_protocol_handle *ph, u32 domain_id,
u32 *power_cap);
int (*cap_set)(const struct scmi_protocol_handle *ph, u32 domain_id,
u32 power_cap, bool ignore_dresp);
int (*cap_enable_set)(const struct scmi_protocol_handle *ph,
u32 domain_id, bool enable);
int (*cap_enable_get)(const struct scmi_protocol_handle *ph,
u32 domain_id, bool *enable);
int (*pai_get)(const struct scmi_protocol_handle *ph, u32 domain_id,
u32 *pai);
int (*pai_set)(const struct scmi_protocol_handle *ph, u32 domain_id,
u32 pai);
int (*measurements_get)(const struct scmi_protocol_handle *ph,
u32 domain_id, u32 *average_power, u32 *pai);
int (*measurements_threshold_set)(const struct scmi_protocol_handle *ph,
u32 domain_id, u32 power_thresh_low,
u32 power_thresh_high);
int (*measurements_threshold_get)(const struct scmi_protocol_handle *ph,
u32 domain_id, u32 *power_thresh_low,
u32 *power_thresh_high);
};
/**
* struct scmi_notify_ops - represents notifications' operations provided by
* SCMI core
* @devm_event_notifier_register: Managed registration of a notifier_block for
* the requested event
* @devm_event_notifier_unregister: Managed unregistration of a notifier_block
* for the requested event
* @event_notifier_register: Register a notifier_block for the requested event
* @event_notifier_unregister: Unregister a notifier_block for the requested
* event
*
* A user can register/unregister its own notifier_block against the wanted
* platform instance regarding the desired event identified by the
* tuple: (proto_id, evt_id, src_id) using the provided register/unregister
* interface where:
*
* @sdev: The scmi_device to use when calling the devres managed ops devm_
* @handle: The handle identifying the platform instance to use, when not
* calling the managed ops devm_
* @proto_id: The protocol ID as in SCMI Specification
* @evt_id: The message ID of the desired event as in SCMI Specification
* @src_id: A pointer to the desired source ID if different sources are
* possible for the protocol (like domain_id, sensor_id...etc)
*
* @src_id can be provided as NULL if it simply does NOT make sense for
* the protocol at hand, OR if the user is explicitly interested in
* receiving notifications from ANY existent source associated to the
* specified proto_id / evt_id.
*
* Received notifications are finally delivered to the registered users,
* invoking the callback provided with the notifier_block *nb as follows:
*
* int user_cb(nb, evt_id, report)
*
* with:
*
* @nb: The notifier block provided by the user
* @evt_id: The message ID of the delivered event
* @report: A custom struct describing the specific event delivered
*/
struct scmi_notify_ops {
int (*devm_event_notifier_register)(struct scmi_device *sdev,
u8 proto_id, u8 evt_id,
const u32 *src_id,
struct notifier_block *nb);
int (*devm_event_notifier_unregister)(struct scmi_device *sdev,
u8 proto_id, u8 evt_id,
const u32 *src_id,
struct notifier_block *nb);
int (*event_notifier_register)(const struct scmi_handle *handle,
u8 proto_id, u8 evt_id,
const u32 *src_id,
struct notifier_block *nb);
int (*event_notifier_unregister)(const struct scmi_handle *handle,
u8 proto_id, u8 evt_id,
const u32 *src_id,
struct notifier_block *nb);
};
/**
* struct scmi_handle - Handle returned to ARM SCMI clients for usage.
*
* @dev: pointer to the SCMI device
* @version: pointer to the structure containing SCMI version information
* @devm_protocol_acquire: devres managed method to get hold of a protocol,
* causing its initialization and related resource
* accounting
* @devm_protocol_get: devres managed method to acquire a protocol and get specific
* operations and a dedicated protocol handler
* @devm_protocol_put: devres managed method to release a protocol
* @is_transport_atomic: method to check if the underlying transport for this
* instance handle is configured to support atomic
* transactions for commands.
* Some users of the SCMI stack in the upper layers could
* be interested to know if they can assume SCMI
* command transactions associated to this handle will
* never sleep and act accordingly.
* An optional atomic threshold value could be returned
* where configured.
* @notify_ops: pointer to set of notifications related operations
*/
struct scmi_handle {
struct device *dev;
struct scmi_revision_info *version;
int __must_check (*devm_protocol_acquire)(struct scmi_device *sdev,
u8 proto);
const void __must_check *
(*devm_protocol_get)(struct scmi_device *sdev, u8 proto,
struct scmi_protocol_handle **ph);
void (*devm_protocol_put)(struct scmi_device *sdev, u8 proto);
bool (*is_transport_atomic)(const struct scmi_handle *handle,
unsigned int *atomic_threshold);
const struct scmi_notify_ops *notify_ops;
};
enum scmi_std_protocol {
SCMI_PROTOCOL_BASE = 0x10,
SCMI_PROTOCOL_POWER = 0x11,
SCMI_PROTOCOL_SYSTEM = 0x12,
SCMI_PROTOCOL_PERF = 0x13,
SCMI_PROTOCOL_CLOCK = 0x14,
SCMI_PROTOCOL_SENSOR = 0x15,
SCMI_PROTOCOL_RESET = 0x16,
SCMI_PROTOCOL_VOLTAGE = 0x17,
SCMI_PROTOCOL_POWERCAP = 0x18,
};
enum scmi_system_events {
SCMI_SYSTEM_SHUTDOWN,
SCMI_SYSTEM_COLDRESET,
SCMI_SYSTEM_WARMRESET,
SCMI_SYSTEM_POWERUP,
SCMI_SYSTEM_SUSPEND,
SCMI_SYSTEM_MAX
};
struct scmi_device {
u32 id;
u8 protocol_id;
const char *name;
struct device dev;
struct scmi_handle *handle;
};
#define to_scmi_dev(d) container_of(d, struct scmi_device, dev)
struct scmi_device_id {
u8 protocol_id;
const char *name;
};
struct scmi_driver {
const char *name;
int (*probe)(struct scmi_device *sdev);
void (*remove)(struct scmi_device *sdev);
const struct scmi_device_id *id_table;
struct device_driver driver;
};
#define to_scmi_driver(d) container_of(d, struct scmi_driver, driver)
#if IS_REACHABLE(CONFIG_ARM_SCMI_PROTOCOL)
int scmi_driver_register(struct scmi_driver *driver,
struct module *owner, const char *mod_name);
void scmi_driver_unregister(struct scmi_driver *driver);
#else
static inline int
scmi_driver_register(struct scmi_driver *driver, struct module *owner,
const char *mod_name)
{
return -EINVAL;
}
static inline void scmi_driver_unregister(struct scmi_driver *driver) {}
#endif /* CONFIG_ARM_SCMI_PROTOCOL */
#define scmi_register(driver) \
scmi_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
#define scmi_unregister(driver) \
scmi_driver_unregister(driver)
/**
* module_scmi_driver() - Helper macro for registering a scmi driver
* @__scmi_driver: scmi_driver structure
*
* Helper macro for scmi drivers to set up proper module init / exit
* functions. Replaces module_init() and module_exit() and keeps people from
* printing pointless things to the kernel log when their driver is loaded.
*/
#define module_scmi_driver(__scmi_driver) \
module_driver(__scmi_driver, scmi_register, scmi_unregister)
/**
* module_scmi_protocol() - Helper macro for registering a scmi protocol
* @__scmi_protocol: scmi_protocol structure
*
* Helper macro for scmi drivers to set up proper module init / exit
* functions. Replaces module_init() and module_exit() and keeps people from
* printing pointless things to the kernel log when their driver is loaded.
*/
#define module_scmi_protocol(__scmi_protocol) \
module_driver(__scmi_protocol, \
scmi_protocol_register, scmi_protocol_unregister)
struct scmi_protocol;
int scmi_protocol_register(const struct scmi_protocol *proto);
void scmi_protocol_unregister(const struct scmi_protocol *proto);
/* SCMI Notification API - Custom Event Reports */
enum scmi_notification_events {
SCMI_EVENT_POWER_STATE_CHANGED = 0x0,
SCMI_EVENT_CLOCK_RATE_CHANGED = 0x0,
SCMI_EVENT_CLOCK_RATE_CHANGE_REQUESTED = 0x1,
SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED = 0x0,
SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED = 0x1,
SCMI_EVENT_SENSOR_TRIP_POINT_EVENT = 0x0,
SCMI_EVENT_SENSOR_UPDATE = 0x1,
SCMI_EVENT_RESET_ISSUED = 0x0,
SCMI_EVENT_BASE_ERROR_EVENT = 0x0,
SCMI_EVENT_SYSTEM_POWER_STATE_NOTIFIER = 0x0,
SCMI_EVENT_POWERCAP_CAP_CHANGED = 0x0,
SCMI_EVENT_POWERCAP_MEASUREMENTS_CHANGED = 0x1,
};
struct scmi_power_state_changed_report {
ktime_t timestamp;
unsigned int agent_id;
unsigned int domain_id;
unsigned int power_state;
};
struct scmi_clock_rate_notif_report {
ktime_t timestamp;
unsigned int agent_id;
unsigned int clock_id;
unsigned long long rate;
};
struct scmi_system_power_state_notifier_report {
ktime_t timestamp;
unsigned int agent_id;
#define SCMI_SYSPOWER_IS_REQUEST_GRACEFUL(flags) ((flags) & BIT(0))
unsigned int flags;
unsigned int system_state;
unsigned int timeout;
};
struct scmi_perf_limits_report {
ktime_t timestamp;
unsigned int agent_id;
unsigned int domain_id;
unsigned int range_max;
unsigned int range_min;
};
struct scmi_perf_level_report {
ktime_t timestamp;
unsigned int agent_id;
unsigned int domain_id;
unsigned int performance_level;
};
struct scmi_sensor_trip_point_report {
ktime_t timestamp;
unsigned int agent_id;
unsigned int sensor_id;
unsigned int trip_point_desc;
};
struct scmi_sensor_update_report {
ktime_t timestamp;
unsigned int agent_id;
unsigned int sensor_id;
unsigned int readings_count;
struct scmi_sensor_reading readings[];
};
struct scmi_reset_issued_report {
ktime_t timestamp;
unsigned int agent_id;
unsigned int domain_id;
unsigned int reset_state;
};
struct scmi_base_error_report {
ktime_t timestamp;
unsigned int agent_id;
bool fatal;
unsigned int cmd_count;
unsigned long long reports[];
};
struct scmi_powercap_cap_changed_report {
ktime_t timestamp;
unsigned int agent_id;
unsigned int domain_id;
unsigned int power_cap;
unsigned int pai;
};
struct scmi_powercap_meas_changed_report {
ktime_t timestamp;
unsigned int agent_id;
unsigned int domain_id;
unsigned int power;
};
#endif /* _LINUX_SCMI_PROTOCOL_H */
|