cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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scpi_protocol.h (2729B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * SCPI Message Protocol driver header
      4 *
      5 * Copyright (C) 2014 ARM Ltd.
      6 */
      7
      8#ifndef _LINUX_SCPI_PROTOCOL_H
      9#define _LINUX_SCPI_PROTOCOL_H
     10
     11#include <linux/types.h>
     12
     13struct scpi_opp {
     14	u32 freq;
     15	u32 m_volt;
     16} __packed;
     17
     18struct scpi_dvfs_info {
     19	unsigned int count;
     20	unsigned int latency; /* in nanoseconds */
     21	struct scpi_opp *opps;
     22};
     23
     24enum scpi_sensor_class {
     25	TEMPERATURE,
     26	VOLTAGE,
     27	CURRENT,
     28	POWER,
     29	ENERGY,
     30};
     31
     32struct scpi_sensor_info {
     33	u16 sensor_id;
     34	u8 class;
     35	u8 trigger_type;
     36	char name[20];
     37} __packed;
     38
     39/**
     40 * struct scpi_ops - represents the various operations provided
     41 *	by SCP through SCPI message protocol
     42 * @get_version: returns the major and minor revision on the SCPI
     43 *	message protocol
     44 * @clk_get_range: gets clock range limit(min - max in Hz)
     45 * @clk_get_val: gets clock value(in Hz)
     46 * @clk_set_val: sets the clock value, setting to 0 will disable the
     47 *	clock (if supported)
     48 * @dvfs_get_idx: gets the Operating Point of the given power domain.
     49 *	OPP is an index to the list return by @dvfs_get_info
     50 * @dvfs_set_idx: sets the Operating Point of the given power domain.
     51 *	OPP is an index to the list return by @dvfs_get_info
     52 * @dvfs_get_info: returns the DVFS capabilities of the given power
     53 *	domain. It includes the OPP list and the latency information
     54 * @device_domain_id: gets the scpi domain id for a given device
     55 * @get_transition_latency: gets the DVFS transition latency for a given device
     56 * @add_opps_to_device: adds all the OPPs for a given device
     57 * @sensor_get_capability: get the list of capabilities for the sensors
     58 * @sensor_get_info: get the information of the specified sensor
     59 * @sensor_get_value: gets the current value of the sensor
     60 * @device_get_power_state: gets the power state of a power domain
     61 * @device_set_power_state: sets the power state of a power domain
     62 */
     63struct scpi_ops {
     64	u32 (*get_version)(void);
     65	int (*clk_get_range)(u16, unsigned long *, unsigned long *);
     66	unsigned long (*clk_get_val)(u16);
     67	int (*clk_set_val)(u16, unsigned long);
     68	int (*dvfs_get_idx)(u8);
     69	int (*dvfs_set_idx)(u8, u8);
     70	struct scpi_dvfs_info *(*dvfs_get_info)(u8);
     71	int (*device_domain_id)(struct device *);
     72	int (*get_transition_latency)(struct device *);
     73	int (*add_opps_to_device)(struct device *);
     74	int (*sensor_get_capability)(u16 *sensors);
     75	int (*sensor_get_info)(u16 sensor_id, struct scpi_sensor_info *);
     76	int (*sensor_get_value)(u16, u64 *);
     77	int (*device_get_power_state)(u16);
     78	int (*device_set_power_state)(u16, u8);
     79};
     80
     81#if IS_REACHABLE(CONFIG_ARM_SCPI_PROTOCOL)
     82struct scpi_ops *get_scpi_ops(void);
     83#else
     84static inline struct scpi_ops *get_scpi_ops(void) { return NULL; }
     85#endif
     86
     87#endif /* _LINUX_SCPI_PROTOCOL_H */