hsmp.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * AMD HSMP Platform Driver
 4 * Copyright (c) 2024, AMD.
 5 * All Rights Reserved.
 6 *
 7 * Header file for HSMP driver
 8 */
 9
10#ifndef HSMP_H
11#define HSMP_H
12
13#include <linux/compiler_types.h>
14#include <linux/device.h>
15#include <linux/hwmon.h>
16#include <linux/kconfig.h>
17#include <linux/miscdevice.h>
18#include <linux/pci.h>
19#include <linux/semaphore.h>
20#include <linux/sysfs.h>
21
22#define HSMP_METRICS_TABLE_NAME	"metrics_bin"
23
24#define HSMP_ATTR_GRP_NAME_SIZE	10
25
26#define HSMP_CDEV_NAME		"hsmp_cdev"
27#define HSMP_DEVNODE_NAME	"hsmp"
28#define ACPI_HSMP_DEVICE_HID    "AMDI0097"
29
30#define DRIVER_VERSION		"2.5"
31
32struct hsmp_mbaddr_info {
33	u32 base_addr;
34	u32 msg_id_off;
35	u32 msg_resp_off;
36	u32 msg_arg_off;
37	u32 size;
38};
39
40struct hsmp_socket {
41	struct bin_attribute hsmp_attr;
42	struct hsmp_mbaddr_info mbinfo;
43	void __iomem *metric_tbl_addr;
44	void __iomem *virt_base_addr;
45	struct semaphore hsmp_sem;
46	char name[HSMP_ATTR_GRP_NAME_SIZE];
47	struct device *dev;
48	u16 sock_ind;
49	int (*amd_hsmp_rdwr)(struct hsmp_socket *sock, u32 off, u32 *val, bool rw);
50};
51
52struct hsmp_plat_device {
53	struct miscdevice mdev;
54	struct hsmp_socket *sock;
55	u32 proto_ver;
56	u16 num_sockets;
57	bool is_probed;
58};
59
60int hsmp_cache_proto_ver(u16 sock_ind);
61int hsmp_test(u16 sock_ind, u32 value);
62long hsmp_ioctl(struct file *fp, unsigned int cmd, unsigned long arg);
63void hsmp_misc_deregister(void);
64int hsmp_misc_register(struct device *dev);
65int hsmp_get_tbl_dram_base(u16 sock_ind);
66ssize_t hsmp_metric_tbl_read(struct hsmp_socket *sock, char *buf, size_t size);
67struct hsmp_plat_device *get_hsmp_pdev(void);
68#if IS_ENABLED(CONFIG_HWMON)
69int hsmp_create_sensor(struct device *dev, u16 sock_ind);
70#else
71static inline int hsmp_create_sensor(struct device *dev, u16 sock_ind) { return 0; }
72#endif
73int hsmp_msg_get_nargs(u16 sock_ind, u32 msg_id, u32 *data, u8 num_args);
74#endif /* HSMP_H */