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1/* SPDX-License-Identifier: GPL-2.0
2 *
3 * Header file for MCDI FW interaction for CDX bus.
4 *
5 * Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
6 */
7
8#ifndef CDX_MCDI_FUNCTIONS_H
9#define CDX_MCDI_FUNCTIONS_H
10
11#include "mcdi.h"
12#include "../cdx.h"
13
14/**
15 * cdx_mcdi_get_num_buses - Get the total number of buses on
16 * the controller.
17 * @cdx: pointer to MCDI interface.
18 *
19 * Return: total number of buses available on the controller,
20 * <0 on failure
21 */
22int cdx_mcdi_get_num_buses(struct cdx_mcdi *cdx);
23
24/**
25 * cdx_mcdi_get_num_devs - Get the total number of devices on
26 * a particular bus of the controller.
27 * @cdx: pointer to MCDI interface.
28 * @bus_num: Bus number.
29 *
30 * Return: total number of devices available on the bus, <0 on failure
31 */
32int cdx_mcdi_get_num_devs(struct cdx_mcdi *cdx, int bus_num);
33
34/**
35 * cdx_mcdi_get_dev_config - Get configuration for a particular
36 * bus_num:dev_num
37 * @cdx: pointer to MCDI interface.
38 * @bus_num: Bus number.
39 * @dev_num: Device number.
40 * @dev_params: Pointer to cdx_dev_params, this is populated by this
41 * device with the configuration corresponding to the provided
42 * bus_num:dev_num.
43 *
44 * Return: 0 total number of devices available on the bus, <0 on failure
45 */
46int cdx_mcdi_get_dev_config(struct cdx_mcdi *cdx,
47 u8 bus_num, u8 dev_num,
48 struct cdx_dev_params *dev_params);
49
50/**
51 * cdx_mcdi_bus_enable - Enable CDX bus represented by bus_num
52 * @cdx: pointer to MCDI interface.
53 * @bus_num: Bus number.
54 *
55 * Return: 0 on success, <0 on failure
56 */
57int cdx_mcdi_bus_enable(struct cdx_mcdi *cdx, u8 bus_num);
58
59/**
60 * cdx_mcdi_bus_disable - Disable CDX bus represented by bus_num
61 * @cdx: pointer to MCDI interface.
62 * @bus_num: Bus number.
63 *
64 * Return: 0 on success, <0 on failure
65 */
66int cdx_mcdi_bus_disable(struct cdx_mcdi *cdx, u8 bus_num);
67
68/**
69 * cdx_mcdi_reset_device - Reset cdx device represented by bus_num:dev_num
70 * @cdx: pointer to MCDI interface.
71 * @bus_num: Bus number.
72 * @dev_num: Device number.
73 *
74 * Return: 0 on success, <0 on failure
75 */
76int cdx_mcdi_reset_device(struct cdx_mcdi *cdx,
77 u8 bus_num, u8 dev_num);
78
79/**
80 * cdx_mcdi_bus_master_enable - Set/Reset bus mastering for cdx device
81 * represented by bus_num:dev_num
82 * @cdx: pointer to MCDI interface.
83 * @bus_num: Bus number.
84 * @dev_num: Device number.
85 * @enable: Enable bus mastering if set, disable otherwise.
86 *
87 * Return: 0 on success, <0 on failure
88 */
89int cdx_mcdi_bus_master_enable(struct cdx_mcdi *cdx, u8 bus_num,
90 u8 dev_num, bool enable);
91
92#endif /* CDX_MCDI_FUNCTIONS_H */