linux/drivers/peci/cpu.c

// SPDX-License-Identifier: GPL-2.0-only
// Copyright (c) 2021 Intel Corporation

#include <linux/auxiliary_bus.h>
#include <linux/module.h>
#include <linux/peci.h>
#include <linux/peci-cpu.h>
#include <linux/slab.h>

#include "internal.h"

/**
 * peci_temp_read() - read the maximum die temperature from PECI target device
 * @device: PECI device to which request is going to be sent
 * @temp_raw: where to store the read temperature
 *
 * It uses GetTemp PECI command.
 *
 * Return: 0 if succeeded, other values in case errors.
 */
int peci_temp_read(struct peci_device *device, s16 *temp_raw)
{ … }
EXPORT_SYMBOL_NS_GPL(…);

/**
 * peci_pcs_read() - read PCS register
 * @device: PECI device to which request is going to be sent
 * @index: PCS index
 * @param: PCS parameter
 * @data: where to store the read data
 *
 * It uses RdPkgConfig PECI command.
 *
 * Return: 0 if succeeded, other values in case errors.
 */
int peci_pcs_read(struct peci_device *device, u8 index, u16 param, u32 *data)
{ … }
EXPORT_SYMBOL_NS_GPL(…);

/**
 * peci_pci_local_read() - read 32-bit memory location using raw address
 * @device: PECI device to which request is going to be sent
 * @bus: bus
 * @dev: device
 * @func: function
 * @reg: register
 * @data: where to store the read data
 *
 * It uses RdPCIConfigLocal PECI command.
 *
 * Return: 0 if succeeded, other values in case errors.
 */
int peci_pci_local_read(struct peci_device *device, u8 bus, u8 dev, u8 func,
			u16 reg, u32 *data)
{ … }
EXPORT_SYMBOL_NS_GPL(…);

/**
 * peci_ep_pci_local_read() - read 32-bit memory location using raw address
 * @device: PECI device to which request is going to be sent
 * @seg: PCI segment
 * @bus: bus
 * @dev: device
 * @func: function
 * @reg: register
 * @data: where to store the read data
 *
 * Like &peci_pci_local_read, but it uses RdEndpointConfig PECI command.
 *
 * Return: 0 if succeeded, other values in case errors.
 */
int peci_ep_pci_local_read(struct peci_device *device, u8 seg,
			   u8 bus, u8 dev, u8 func, u16 reg, u32 *data)
{ … }
EXPORT_SYMBOL_NS_GPL(…);

/**
 * peci_mmio_read() - read 32-bit memory location using 64-bit bar offset address
 * @device: PECI device to which request is going to be sent
 * @bar: PCI bar
 * @seg: PCI segment
 * @bus: bus
 * @dev: device
 * @func: function
 * @address: 64-bit MMIO address
 * @data: where to store the read data
 *
 * It uses RdEndpointConfig PECI command.
 *
 * Return: 0 if succeeded, other values in case errors.
 */
int peci_mmio_read(struct peci_device *device, u8 bar, u8 seg,
		   u8 bus, u8 dev, u8 func, u64 address, u32 *data)
{ … }
EXPORT_SYMBOL_NS_GPL(…);

static const char * const peci_adev_types[] = …;

struct peci_cpu { … };

static void adev_release(struct device *dev)
{ … }

static struct auxiliary_device *adev_alloc(struct peci_cpu *priv, int idx)
{ … }

static void unregister_adev(void *_adev)
{ … }

static int devm_adev_add(struct device *dev, int idx)
{ … }

static void peci_cpu_add_adevices(struct peci_cpu *priv)
{ … }

static int
peci_cpu_probe(struct peci_device *device, const struct peci_device_id *id)
{ … }

static const struct peci_device_id peci_cpu_device_ids[] = …;
MODULE_DEVICE_TABLE(peci, peci_cpu_device_ids);

static struct peci_driver peci_cpu_driver = …;
module_peci_driver(…) …;

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;
MODULE_IMPORT_NS(…);