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- AMD provides custom protocol to read Processor feature capabilities and configuration information through side band. The information is accessed by providing CPUID Function, extended function and thread ID to the protocol. Undefined function returns 0. Reviewed-by: Naveen Krishna Chatradhi <naveenkrishna.chatradhi@amd.com> Signed-off-by: Akshay Gupta <akshay.gupta@amd.com> Link: https://lore.kernel.org/r/20250428063034.2145566-8-akshay.gupta@amd.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
74 lines
1.7 KiB
C
74 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2025 Advanced Micro Devices, Inc.
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*/
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#ifndef _SBRMI_CORE_H_
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#define _SBRMI_CORE_H_
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#include <linux/miscdevice.h>
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#include <linux/mutex.h>
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#include <linux/i2c.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <uapi/misc/amd-apml.h>
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/* SB-RMI registers */
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enum sbrmi_reg {
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SBRMI_REV,
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SBRMI_CTRL,
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SBRMI_STATUS,
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SBRMI_OUTBNDMSG0 = 0x30,
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SBRMI_OUTBNDMSG1,
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SBRMI_OUTBNDMSG2,
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SBRMI_OUTBNDMSG3,
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SBRMI_OUTBNDMSG4,
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SBRMI_OUTBNDMSG5,
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SBRMI_OUTBNDMSG6,
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SBRMI_OUTBNDMSG7,
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SBRMI_INBNDMSG0,
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SBRMI_INBNDMSG1,
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SBRMI_INBNDMSG2,
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SBRMI_INBNDMSG3,
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SBRMI_INBNDMSG4,
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SBRMI_INBNDMSG5,
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SBRMI_INBNDMSG6,
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SBRMI_INBNDMSG7,
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SBRMI_SW_INTERRUPT,
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SBRMI_THREAD128CS = 0x4b,
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};
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/*
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* SB-RMI supports soft mailbox service request to MP1 (power management
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* firmware) through SBRMI inbound/outbound message registers.
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* SB-RMI message IDs
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*/
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enum sbrmi_msg_id {
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SBRMI_READ_PKG_PWR_CONSUMPTION = 0x1,
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SBRMI_WRITE_PKG_PWR_LIMIT,
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SBRMI_READ_PKG_PWR_LIMIT,
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SBRMI_READ_PKG_MAX_PWR_LIMIT,
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};
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/* Each client has this additional data */
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struct sbrmi_data {
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struct miscdevice sbrmi_misc_dev;
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struct regmap *regmap;
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/* Mutex locking */
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struct mutex lock;
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u32 pwr_limit_max;
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u8 dev_static_addr;
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u8 rev;
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};
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int rmi_mailbox_xfer(struct sbrmi_data *data, struct apml_mbox_msg *msg);
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#ifdef CONFIG_AMD_SBRMI_HWMON
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int create_hwmon_sensor_device(struct device *dev, struct sbrmi_data *data);
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#else
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static inline int create_hwmon_sensor_device(struct device *dev, struct sbrmi_data *data)
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{
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return 0;
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}
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#endif
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int create_misc_rmi_device(struct sbrmi_data *data, struct device *dev);
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#endif /*_SBRMI_CORE_H_*/
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