1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * SCMI Message Protocol driver header
5 * Copyright (C) 2018-2021 ARM Ltd.
8 #ifndef _LINUX_SCMI_PROTOCOL_H
9 #define _LINUX_SCMI_PROTOCOL_H
11 #include <linux/bitfield.h>
12 #include <linux/device.h>
13 #include <linux/notifier.h>
14 #include <linux/types.h>
16 #define SCMI_MAX_STR_SIZE 16
17 #define SCMI_MAX_NUM_RATES 16
20 * struct scmi_revision_info - version information structure
22 * @major_ver: Major ABI version. Change here implies risk of backward
23 * compatibility break.
24 * @minor_ver: Minor ABI version. Change here implies new feature addition,
25 * or compatible change in ABI.
26 * @num_protocols: Number of protocols that are implemented, excluding the
28 * @num_agents: Number of agents in the system.
29 * @impl_ver: A vendor-specific implementation version.
30 * @vendor_id: A vendor identifier(Null terminated ASCII string)
31 * @sub_vendor_id: A sub-vendor identifier(Null terminated ASCII string)
33 struct scmi_revision_info {
39 char vendor_id[SCMI_MAX_STR_SIZE];
40 char sub_vendor_id[SCMI_MAX_STR_SIZE];
43 struct scmi_clock_info {
44 char name[SCMI_MAX_STR_SIZE];
45 unsigned int enable_latency;
50 u64 rates[SCMI_MAX_NUM_RATES];
62 struct scmi_protocol_handle;
65 * struct scmi_clk_proto_ops - represents the various operations provided
66 * by SCMI Clock Protocol
68 * @count_get: get the count of clocks provided by SCMI
69 * @info_get: get the information of the specified clock
70 * @rate_get: request the current clock rate of a clock
71 * @rate_set: set the clock rate of a clock
72 * @enable: enables the specified clock
73 * @disable: disables the specified clock
75 struct scmi_clk_proto_ops {
76 int (*count_get)(const struct scmi_protocol_handle *ph);
78 const struct scmi_clock_info *(*info_get)
79 (const struct scmi_protocol_handle *ph, u32 clk_id);
80 int (*rate_get)(const struct scmi_protocol_handle *ph, u32 clk_id,
82 int (*rate_set)(const struct scmi_protocol_handle *ph, u32 clk_id,
84 int (*enable)(const struct scmi_protocol_handle *ph, u32 clk_id);
85 int (*disable)(const struct scmi_protocol_handle *ph, u32 clk_id);
86 int (*enable_atomic)(const struct scmi_protocol_handle *ph, u32 clk_id);
87 int (*disable_atomic)(const struct scmi_protocol_handle *ph,
92 * struct scmi_perf_proto_ops - represents the various operations provided
93 * by SCMI Performance Protocol
95 * @limits_set: sets limits on the performance level of a domain
96 * @limits_get: gets limits on the performance level of a domain
97 * @level_set: sets the performance level of a domain
98 * @level_get: gets the performance level of a domain
99 * @device_domain_id: gets the scmi domain id for a given device
100 * @transition_latency_get: gets the DVFS transition latency for a given device
101 * @device_opps_add: adds all the OPPs for a given device
102 * @freq_set: sets the frequency for a given device using sustained frequency
103 * to sustained performance level mapping
104 * @freq_get: gets the frequency for a given device using sustained frequency
105 * to sustained performance level mapping
106 * @est_power_get: gets the estimated power cost for a given performance domain
107 * at a given frequency
108 * @fast_switch_possible: indicates if fast DVFS switching is possible or not
110 * @power_scale_mw_get: indicates if the power values provided are in milliWatts
111 * or in some other (abstract) scale
113 struct scmi_perf_proto_ops {
114 int (*limits_set)(const struct scmi_protocol_handle *ph, u32 domain,
115 u32 max_perf, u32 min_perf);
116 int (*limits_get)(const struct scmi_protocol_handle *ph, u32 domain,
117 u32 *max_perf, u32 *min_perf);
118 int (*level_set)(const struct scmi_protocol_handle *ph, u32 domain,
119 u32 level, bool poll);
120 int (*level_get)(const struct scmi_protocol_handle *ph, u32 domain,
121 u32 *level, bool poll);
122 int (*device_domain_id)(struct device *dev);
123 int (*transition_latency_get)(const struct scmi_protocol_handle *ph,
125 int (*device_opps_add)(const struct scmi_protocol_handle *ph,
127 int (*freq_set)(const struct scmi_protocol_handle *ph, u32 domain,
128 unsigned long rate, bool poll);
129 int (*freq_get)(const struct scmi_protocol_handle *ph, u32 domain,
130 unsigned long *rate, bool poll);
131 int (*est_power_get)(const struct scmi_protocol_handle *ph, u32 domain,
132 unsigned long *rate, unsigned long *power);
133 bool (*fast_switch_possible)(const struct scmi_protocol_handle *ph,
135 bool (*power_scale_mw_get)(const struct scmi_protocol_handle *ph);
139 * struct scmi_power_proto_ops - represents the various operations provided
140 * by SCMI Power Protocol
142 * @num_domains_get: get the count of power domains provided by SCMI
143 * @name_get: gets the name of a power domain
144 * @state_set: sets the power state of a power domain
145 * @state_get: gets the power state of a power domain
147 struct scmi_power_proto_ops {
148 int (*num_domains_get)(const struct scmi_protocol_handle *ph);
149 char *(*name_get)(const struct scmi_protocol_handle *ph, u32 domain);
150 #define SCMI_POWER_STATE_TYPE_SHIFT 30
151 #define SCMI_POWER_STATE_ID_MASK (BIT(28) - 1)
152 #define SCMI_POWER_STATE_PARAM(type, id) \
153 ((((type) & BIT(0)) << SCMI_POWER_STATE_TYPE_SHIFT) | \
154 ((id) & SCMI_POWER_STATE_ID_MASK))
155 #define SCMI_POWER_STATE_GENERIC_ON SCMI_POWER_STATE_PARAM(0, 0)
156 #define SCMI_POWER_STATE_GENERIC_OFF SCMI_POWER_STATE_PARAM(1, 0)
157 int (*state_set)(const struct scmi_protocol_handle *ph, u32 domain,
159 int (*state_get)(const struct scmi_protocol_handle *ph, u32 domain,
164 * struct scmi_sensor_reading - represent a timestamped read
166 * Used by @reading_get_timestamped method.
168 * @value: The signed value sensor read.
169 * @timestamp: An unsigned timestamp for the sensor read, as provided by
170 * SCMI platform. Set to zero when not available.
172 struct scmi_sensor_reading {
174 unsigned long long timestamp;
178 * struct scmi_range_attrs - specifies a sensor or axis values' range
179 * @min_range: The minimum value which can be represented by the sensor/axis.
180 * @max_range: The maximum value which can be represented by the sensor/axis.
182 struct scmi_range_attrs {
188 * struct scmi_sensor_axis_info - describes one sensor axes
190 * @type: Axes type. Chosen amongst one of @enum scmi_sensor_class.
191 * @scale: Power-of-10 multiplier applied to the axis unit.
192 * @name: NULL-terminated string representing axes name as advertised by
194 * @extended_attrs: Flag to indicate the presence of additional extended
195 * attributes for this axes.
196 * @resolution: Extended attribute representing the resolution of the axes.
197 * Set to 0 if not reported by this axes.
198 * @exponent: Extended attribute representing the power-of-10 multiplier that
199 * is applied to the resolution field. Set to 0 if not reported by
201 * @attrs: Extended attributes representing minimum and maximum values
202 * measurable by this axes. Set to 0 if not reported by this sensor.
204 struct scmi_sensor_axis_info {
208 char name[SCMI_MAX_STR_SIZE];
210 unsigned int resolution;
212 struct scmi_range_attrs attrs;
216 * struct scmi_sensor_intervals_info - describes number and type of available
218 * @segmented: Flag for segmented intervals' representation. When True there
219 * will be exactly 3 intervals in @desc, with each entry
220 * representing a member of a segment in this order:
221 * {lowest update interval, highest update interval, step size}
222 * @count: Number of intervals described in @desc.
223 * @desc: Array of @count interval descriptor bitmask represented as detailed in
224 * the SCMI specification: it can be accessed using the accompanying
226 * @prealloc_pool: A minimal preallocated pool of desc entries used to avoid
227 * lesser-than-64-bytes dynamic allocation for small @count
230 struct scmi_sensor_intervals_info {
233 #define SCMI_SENS_INTVL_SEGMENT_LOW 0
234 #define SCMI_SENS_INTVL_SEGMENT_HIGH 1
235 #define SCMI_SENS_INTVL_SEGMENT_STEP 2
237 #define SCMI_SENS_INTVL_GET_SECS(x) FIELD_GET(GENMASK(20, 5), (x))
238 #define SCMI_SENS_INTVL_GET_EXP(x) \
240 int __signed_exp = FIELD_GET(GENMASK(4, 0), (x)); \
242 if (__signed_exp & BIT(4)) \
243 __signed_exp |= GENMASK(31, 5); \
246 #define SCMI_MAX_PREALLOC_POOL 16
247 unsigned int prealloc_pool[SCMI_MAX_PREALLOC_POOL];
251 * struct scmi_sensor_info - represents information related to one of the
254 * @type: Sensor type. Chosen amongst one of @enum scmi_sensor_class.
255 * @scale: Power-of-10 multiplier applied to the sensor unit.
256 * @num_trip_points: Number of maximum configurable trip points.
257 * @async: Flag for asynchronous read support.
258 * @update: Flag for continuouos update notification support.
259 * @timestamped: Flag for timestamped read support.
260 * @tstamp_scale: Power-of-10 multiplier applied to the sensor timestamps to
261 * represent it in seconds.
262 * @num_axis: Number of supported axis if any. Reported as 0 for scalar sensors.
263 * @axis: Pointer to an array of @num_axis descriptors.
264 * @intervals: Descriptor of available update intervals.
265 * @sensor_config: A bitmask reporting the current sensor configuration as
266 * detailed in the SCMI specification: it can accessed and
267 * modified through the accompanying macros.
268 * @name: NULL-terminated string representing sensor name as advertised by
270 * @extended_scalar_attrs: Flag to indicate the presence of additional extended
271 * attributes for this sensor.
272 * @sensor_power: Extended attribute representing the average power
273 * consumed by the sensor in microwatts (uW) when it is active.
274 * Reported here only for scalar sensors.
275 * Set to 0 if not reported by this sensor.
276 * @resolution: Extended attribute representing the resolution of the sensor.
277 * Reported here only for scalar sensors.
278 * Set to 0 if not reported by this sensor.
279 * @exponent: Extended attribute representing the power-of-10 multiplier that is
280 * applied to the resolution field.
281 * Reported here only for scalar sensors.
282 * Set to 0 if not reported by this sensor.
283 * @scalar_attrs: Extended attributes representing minimum and maximum
284 * measurable values by this sensor.
285 * Reported here only for scalar sensors.
286 * Set to 0 if not reported by this sensor.
288 struct scmi_sensor_info {
292 unsigned int num_trip_points;
297 unsigned int num_axis;
298 struct scmi_sensor_axis_info *axis;
299 struct scmi_sensor_intervals_info intervals;
300 unsigned int sensor_config;
301 #define SCMI_SENS_CFG_UPDATE_SECS_MASK GENMASK(31, 16)
302 #define SCMI_SENS_CFG_GET_UPDATE_SECS(x) \
303 FIELD_GET(SCMI_SENS_CFG_UPDATE_SECS_MASK, (x))
305 #define SCMI_SENS_CFG_UPDATE_EXP_MASK GENMASK(15, 11)
306 #define SCMI_SENS_CFG_GET_UPDATE_EXP(x) \
309 FIELD_GET(SCMI_SENS_CFG_UPDATE_EXP_MASK, (x)); \
311 if (__signed_exp & BIT(4)) \
312 __signed_exp |= GENMASK(31, 5); \
316 #define SCMI_SENS_CFG_ROUND_MASK GENMASK(10, 9)
317 #define SCMI_SENS_CFG_ROUND_AUTO 2
318 #define SCMI_SENS_CFG_ROUND_UP 1
319 #define SCMI_SENS_CFG_ROUND_DOWN 0
321 #define SCMI_SENS_CFG_TSTAMP_ENABLED_MASK BIT(1)
322 #define SCMI_SENS_CFG_TSTAMP_ENABLE 1
323 #define SCMI_SENS_CFG_TSTAMP_DISABLE 0
324 #define SCMI_SENS_CFG_IS_TSTAMP_ENABLED(x) \
325 FIELD_GET(SCMI_SENS_CFG_TSTAMP_ENABLED_MASK, (x))
327 #define SCMI_SENS_CFG_SENSOR_ENABLED_MASK BIT(0)
328 #define SCMI_SENS_CFG_SENSOR_ENABLE 1
329 #define SCMI_SENS_CFG_SENSOR_DISABLE 0
330 char name[SCMI_MAX_STR_SIZE];
331 #define SCMI_SENS_CFG_IS_ENABLED(x) FIELD_GET(BIT(0), (x))
332 bool extended_scalar_attrs;
333 unsigned int sensor_power;
334 unsigned int resolution;
336 struct scmi_range_attrs scalar_attrs;
340 * Partial list from Distributed Management Task Force (DMTF) specification:
341 * DSP0249 (Platform Level Data Model specification)
343 enum scmi_sensor_class {
413 NEWTON_METERS = 0x45,
424 CORRECTED_ERRS = 0x50,
425 UNCORRECTABLE_ERRS = 0x51,
433 METERS_SEC_SQUARED = 0x59,
435 CUBIC_METERS_SEC = 0x5B,
437 RADIANS_SEC_SQUARED = 0x5D,
442 * struct scmi_sensor_proto_ops - represents the various operations provided
443 * by SCMI Sensor Protocol
445 * @count_get: get the count of sensors provided by SCMI
446 * @info_get: get the information of the specified sensor
447 * @trip_point_config: selects and configures a trip-point of interest
448 * @reading_get: gets the current value of the sensor
449 * @reading_get_timestamped: gets the current value and timestamp, when
450 * available, of the sensor. (as of v3.0 spec)
451 * Supports multi-axis sensors for sensors which
452 * supports it and if the @reading array size of
453 * @count entry equals the sensor num_axis
454 * @config_get: Get sensor current configuration
455 * @config_set: Set sensor current configuration
457 struct scmi_sensor_proto_ops {
458 int (*count_get)(const struct scmi_protocol_handle *ph);
459 const struct scmi_sensor_info *(*info_get)
460 (const struct scmi_protocol_handle *ph, u32 sensor_id);
461 int (*trip_point_config)(const struct scmi_protocol_handle *ph,
462 u32 sensor_id, u8 trip_id, u64 trip_value);
463 int (*reading_get)(const struct scmi_protocol_handle *ph, u32 sensor_id,
465 int (*reading_get_timestamped)(const struct scmi_protocol_handle *ph,
466 u32 sensor_id, u8 count,
467 struct scmi_sensor_reading *readings);
468 int (*config_get)(const struct scmi_protocol_handle *ph,
469 u32 sensor_id, u32 *sensor_config);
470 int (*config_set)(const struct scmi_protocol_handle *ph,
471 u32 sensor_id, u32 sensor_config);
475 * struct scmi_reset_proto_ops - represents the various operations provided
476 * by SCMI Reset Protocol
478 * @num_domains_get: get the count of reset domains provided by SCMI
479 * @name_get: gets the name of a reset domain
480 * @latency_get: gets the reset latency for the specified reset domain
481 * @reset: resets the specified reset domain
482 * @assert: explicitly assert reset signal of the specified reset domain
483 * @deassert: explicitly deassert reset signal of the specified reset domain
485 struct scmi_reset_proto_ops {
486 int (*num_domains_get)(const struct scmi_protocol_handle *ph);
487 char *(*name_get)(const struct scmi_protocol_handle *ph, u32 domain);
488 int (*latency_get)(const struct scmi_protocol_handle *ph, u32 domain);
489 int (*reset)(const struct scmi_protocol_handle *ph, u32 domain);
490 int (*assert)(const struct scmi_protocol_handle *ph, u32 domain);
491 int (*deassert)(const struct scmi_protocol_handle *ph, u32 domain);
495 * struct scmi_voltage_info - describe one available SCMI Voltage Domain
497 * @id: the domain ID as advertised by the platform
498 * @segmented: defines the layout of the entries of array @levels_uv.
499 * - when True the entries are to be interpreted as triplets,
500 * each defining a segment representing a range of equally
501 * space voltages: <lowest_volts>, <highest_volt>, <step_uV>
502 * - when False the entries simply represent a single discrete
503 * supported voltage level
504 * @negative_volts_allowed: True if any of the entries of @levels_uv represent
505 * a negative voltage.
506 * @attributes: represents Voltage Domain advertised attributes
507 * @name: name assigned to the Voltage Domain by platform
508 * @num_levels: number of total entries in @levels_uv.
509 * @levels_uv: array of entries describing the available voltage levels for
512 struct scmi_voltage_info {
515 bool negative_volts_allowed;
516 unsigned int attributes;
517 char name[SCMI_MAX_STR_SIZE];
518 unsigned int num_levels;
519 #define SCMI_VOLTAGE_SEGMENT_LOW 0
520 #define SCMI_VOLTAGE_SEGMENT_HIGH 1
521 #define SCMI_VOLTAGE_SEGMENT_STEP 2
526 * struct scmi_voltage_proto_ops - represents the various operations provided
527 * by SCMI Voltage Protocol
529 * @num_domains_get: get the count of voltage domains provided by SCMI
530 * @info_get: get the information of the specified domain
531 * @config_set: set the config for the specified domain
532 * @config_get: get the config of the specified domain
533 * @level_set: set the voltage level for the specified domain
534 * @level_get: get the voltage level of the specified domain
536 struct scmi_voltage_proto_ops {
537 int (*num_domains_get)(const struct scmi_protocol_handle *ph);
538 const struct scmi_voltage_info __must_check *(*info_get)
539 (const struct scmi_protocol_handle *ph, u32 domain_id);
540 int (*config_set)(const struct scmi_protocol_handle *ph, u32 domain_id,
542 #define SCMI_VOLTAGE_ARCH_STATE_OFF 0x0
543 #define SCMI_VOLTAGE_ARCH_STATE_ON 0x7
544 int (*config_get)(const struct scmi_protocol_handle *ph, u32 domain_id,
546 int (*level_set)(const struct scmi_protocol_handle *ph, u32 domain_id,
547 u32 flags, s32 volt_uV);
548 int (*level_get)(const struct scmi_protocol_handle *ph, u32 domain_id,
553 * struct scmi_notify_ops - represents notifications' operations provided by
555 * @devm_event_notifier_register: Managed registration of a notifier_block for
556 * the requested event
557 * @devm_event_notifier_unregister: Managed unregistration of a notifier_block
558 * for the requested event
559 * @event_notifier_register: Register a notifier_block for the requested event
560 * @event_notifier_unregister: Unregister a notifier_block for the requested
563 * A user can register/unregister its own notifier_block against the wanted
564 * platform instance regarding the desired event identified by the
565 * tuple: (proto_id, evt_id, src_id) using the provided register/unregister
568 * @sdev: The scmi_device to use when calling the devres managed ops devm_
569 * @handle: The handle identifying the platform instance to use, when not
570 * calling the managed ops devm_
571 * @proto_id: The protocol ID as in SCMI Specification
572 * @evt_id: The message ID of the desired event as in SCMI Specification
573 * @src_id: A pointer to the desired source ID if different sources are
574 * possible for the protocol (like domain_id, sensor_id...etc)
576 * @src_id can be provided as NULL if it simply does NOT make sense for
577 * the protocol at hand, OR if the user is explicitly interested in
578 * receiving notifications from ANY existent source associated to the
579 * specified proto_id / evt_id.
581 * Received notifications are finally delivered to the registered users,
582 * invoking the callback provided with the notifier_block *nb as follows:
584 * int user_cb(nb, evt_id, report)
588 * @nb: The notifier block provided by the user
589 * @evt_id: The message ID of the delivered event
590 * @report: A custom struct describing the specific event delivered
592 struct scmi_notify_ops {
593 int (*devm_event_notifier_register)(struct scmi_device *sdev,
594 u8 proto_id, u8 evt_id,
596 struct notifier_block *nb);
597 int (*devm_event_notifier_unregister)(struct scmi_device *sdev,
598 u8 proto_id, u8 evt_id,
600 struct notifier_block *nb);
601 int (*event_notifier_register)(const struct scmi_handle *handle,
602 u8 proto_id, u8 evt_id,
604 struct notifier_block *nb);
605 int (*event_notifier_unregister)(const struct scmi_handle *handle,
606 u8 proto_id, u8 evt_id,
608 struct notifier_block *nb);
612 * struct scmi_handle - Handle returned to ARM SCMI clients for usage.
614 * @dev: pointer to the SCMI device
615 * @version: pointer to the structure containing SCMI version information
616 * @devm_protocol_get: devres managed method to acquire a protocol and get specific
617 * operations and a dedicated protocol handler
618 * @devm_protocol_put: devres managed method to release a protocol
619 * @is_transport_atomic: method to check if the underlying transport for this
620 * instance handle is configured to support atomic
621 * transactions for commands.
622 * Some users of the SCMI stack in the upper layers could
623 * be interested to know if they can assume SCMI
624 * command transactions associated to this handle will
625 * never sleep and act accordingly.
626 * An optional atomic threshold value could be returned
628 * @notify_ops: pointer to set of notifications related operations
632 struct scmi_revision_info *version;
634 const void __must_check *
635 (*devm_protocol_get)(struct scmi_device *sdev, u8 proto,
636 struct scmi_protocol_handle **ph);
637 void (*devm_protocol_put)(struct scmi_device *sdev, u8 proto);
638 bool (*is_transport_atomic)(const struct scmi_handle *handle,
639 unsigned int *atomic_threshold);
641 const struct scmi_notify_ops *notify_ops;
644 enum scmi_std_protocol {
645 SCMI_PROTOCOL_BASE = 0x10,
646 SCMI_PROTOCOL_POWER = 0x11,
647 SCMI_PROTOCOL_SYSTEM = 0x12,
648 SCMI_PROTOCOL_PERF = 0x13,
649 SCMI_PROTOCOL_CLOCK = 0x14,
650 SCMI_PROTOCOL_SENSOR = 0x15,
651 SCMI_PROTOCOL_RESET = 0x16,
652 SCMI_PROTOCOL_VOLTAGE = 0x17,
655 enum scmi_system_events {
656 SCMI_SYSTEM_SHUTDOWN,
657 SCMI_SYSTEM_COLDRESET,
658 SCMI_SYSTEM_WARMRESET,
669 struct scmi_handle *handle;
672 #define to_scmi_dev(d) container_of(d, struct scmi_device, dev)
675 scmi_device_create(struct device_node *np, struct device *parent, int protocol,
677 void scmi_device_destroy(struct scmi_device *scmi_dev);
679 struct scmi_device_id {
686 int (*probe)(struct scmi_device *sdev);
687 void (*remove)(struct scmi_device *sdev);
688 const struct scmi_device_id *id_table;
690 struct device_driver driver;
693 #define to_scmi_driver(d) container_of(d, struct scmi_driver, driver)
695 #if IS_REACHABLE(CONFIG_ARM_SCMI_PROTOCOL)
696 int scmi_driver_register(struct scmi_driver *driver,
697 struct module *owner, const char *mod_name);
698 void scmi_driver_unregister(struct scmi_driver *driver);
701 scmi_driver_register(struct scmi_driver *driver, struct module *owner,
702 const char *mod_name)
707 static inline void scmi_driver_unregister(struct scmi_driver *driver) {}
708 #endif /* CONFIG_ARM_SCMI_PROTOCOL */
710 #define scmi_register(driver) \
711 scmi_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
712 #define scmi_unregister(driver) \
713 scmi_driver_unregister(driver)
716 * module_scmi_driver() - Helper macro for registering a scmi driver
717 * @__scmi_driver: scmi_driver structure
719 * Helper macro for scmi drivers to set up proper module init / exit
720 * functions. Replaces module_init() and module_exit() and keeps people from
721 * printing pointless things to the kernel log when their driver is loaded.
723 #define module_scmi_driver(__scmi_driver) \
724 module_driver(__scmi_driver, scmi_register, scmi_unregister)
727 * module_scmi_protocol() - Helper macro for registering a scmi protocol
728 * @__scmi_protocol: scmi_protocol structure
730 * Helper macro for scmi drivers to set up proper module init / exit
731 * functions. Replaces module_init() and module_exit() and keeps people from
732 * printing pointless things to the kernel log when their driver is loaded.
734 #define module_scmi_protocol(__scmi_protocol) \
735 module_driver(__scmi_protocol, \
736 scmi_protocol_register, scmi_protocol_unregister)
738 struct scmi_protocol;
739 int scmi_protocol_register(const struct scmi_protocol *proto);
740 void scmi_protocol_unregister(const struct scmi_protocol *proto);
742 /* SCMI Notification API - Custom Event Reports */
743 enum scmi_notification_events {
744 SCMI_EVENT_POWER_STATE_CHANGED = 0x0,
745 SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED = 0x0,
746 SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED = 0x1,
747 SCMI_EVENT_SENSOR_TRIP_POINT_EVENT = 0x0,
748 SCMI_EVENT_SENSOR_UPDATE = 0x1,
749 SCMI_EVENT_RESET_ISSUED = 0x0,
750 SCMI_EVENT_BASE_ERROR_EVENT = 0x0,
751 SCMI_EVENT_SYSTEM_POWER_STATE_NOTIFIER = 0x0,
754 struct scmi_power_state_changed_report {
756 unsigned int agent_id;
757 unsigned int domain_id;
758 unsigned int power_state;
761 struct scmi_system_power_state_notifier_report {
763 unsigned int agent_id;
765 unsigned int system_state;
768 struct scmi_perf_limits_report {
770 unsigned int agent_id;
771 unsigned int domain_id;
772 unsigned int range_max;
773 unsigned int range_min;
776 struct scmi_perf_level_report {
778 unsigned int agent_id;
779 unsigned int domain_id;
780 unsigned int performance_level;
783 struct scmi_sensor_trip_point_report {
785 unsigned int agent_id;
786 unsigned int sensor_id;
787 unsigned int trip_point_desc;
790 struct scmi_sensor_update_report {
792 unsigned int agent_id;
793 unsigned int sensor_id;
794 unsigned int readings_count;
795 struct scmi_sensor_reading readings[];
798 struct scmi_reset_issued_report {
800 unsigned int agent_id;
801 unsigned int domain_id;
802 unsigned int reset_state;
805 struct scmi_base_error_report {
807 unsigned int agent_id;
809 unsigned int cmd_count;
810 unsigned long long reports[];
813 #endif /* _LINUX_SCMI_PROTOCOL_H */