linux/drivers/platform/x86/amd/pmf/core.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * AMD Platform Management Framework Driver
 *
 * Copyright (c) 2022, Advanced Micro Devices, Inc.
 * All Rights Reserved.
 *
 * Author: Shyam Sundar S K <[email protected]>
 */

#include <asm/amd_nb.h>
#include <linux/debugfs.h>
#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include "pmf.h"

/* PMF-SMU communication registers */
#define AMD_PMF_REGISTER_MESSAGE …
#define AMD_PMF_REGISTER_RESPONSE …
#define AMD_PMF_REGISTER_ARGUMENT …

/* Base address of SMU for mapping physical address to virtual address */
#define AMD_PMF_MAPPING_SIZE …
#define AMD_PMF_BASE_ADDR_OFFSET …
#define AMD_PMF_BASE_ADDR_LO …
#define AMD_PMF_BASE_ADDR_HI …
#define AMD_PMF_BASE_ADDR_LO_MASK …
#define AMD_PMF_BASE_ADDR_HI_MASK …

/* SMU Response Codes */
#define AMD_PMF_RESULT_OK …
#define AMD_PMF_RESULT_CMD_REJECT_BUSY …
#define AMD_PMF_RESULT_CMD_REJECT_PREREQ …
#define AMD_PMF_RESULT_CMD_UNKNOWN …
#define AMD_PMF_RESULT_FAILED …

/* List of supported CPU ids */
#define AMD_CPU_ID_RMB …
#define AMD_CPU_ID_PS …
#define PCI_DEVICE_ID_AMD_1AH_M20H_ROOT …
#define PCI_DEVICE_ID_AMD_1AH_M60H_ROOT …

#define PMF_MSG_DELAY_MIN_US …
#define RESPONSE_REGISTER_LOOP_MAX …

#define DELAY_MIN_US …
#define DELAY_MAX_US …

/* override Metrics Table sample size time (in ms) */
static int metrics_table_loop_ms = …;
module_param(metrics_table_loop_ms, int, 0644);
MODULE_PARM_DESC(…) …;

/* Force load on supported older platforms */
static bool force_load;
module_param(force_load, bool, 0444);
MODULE_PARM_DESC(…) …;

static int amd_pmf_pwr_src_notify_call(struct notifier_block *nb, unsigned long event, void *data)
{ … }

static int current_power_limits_show(struct seq_file *seq, void *unused)
{ … }
DEFINE_SHOW_ATTRIBUTE(…);

static void amd_pmf_dbgfs_unregister(struct amd_pmf_dev *dev)
{ … }

static void amd_pmf_dbgfs_register(struct amd_pmf_dev *dev)
{ … }

int amd_pmf_get_power_source(void)
{ … }

static void amd_pmf_get_metrics(struct work_struct *work)
{ … }

static inline u32 amd_pmf_reg_read(struct amd_pmf_dev *dev, int reg_offset)
{ … }

static inline void amd_pmf_reg_write(struct amd_pmf_dev *dev, int reg_offset, u32 val)
{ … }

static void __maybe_unused amd_pmf_dump_registers(struct amd_pmf_dev *dev)
{ … }

int amd_pmf_send_cmd(struct amd_pmf_dev *dev, u8 message, bool get, u32 arg, u32 *data)
{ … }

static const struct pci_device_id pmf_pci_ids[] = …;

int amd_pmf_set_dram_addr(struct amd_pmf_dev *dev, bool alloc_buffer)
{ … }

int amd_pmf_init_metrics_table(struct amd_pmf_dev *dev)
{ … }

static int amd_pmf_suspend_handler(struct device *dev)
{ … }

static int amd_pmf_resume_handler(struct device *dev)
{ … }

static DEFINE_SIMPLE_DEV_PM_OPS(amd_pmf_pm, amd_pmf_suspend_handler, amd_pmf_resume_handler);

static void amd_pmf_init_features(struct amd_pmf_dev *dev)
{ … }

static void amd_pmf_deinit_features(struct amd_pmf_dev *dev)
{ … }

static const struct acpi_device_id amd_pmf_acpi_ids[] = …;
MODULE_DEVICE_TABLE(acpi, amd_pmf_acpi_ids);

static int amd_pmf_probe(struct platform_device *pdev)
{ … }

static void amd_pmf_remove(struct platform_device *pdev)
{ … }

static const struct attribute_group *amd_pmf_driver_groups[] = …;

static struct platform_driver amd_pmf_driver = …;
module_platform_driver(…) …;

MODULE_LICENSE(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_SOFTDEP(…) …;