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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __FIRMWARE_SYSFS_H
3#define __FIRMWARE_SYSFS_H
4
5#include <linux/device.h>
6
7#include "firmware.h"
8
9MODULE_IMPORT_NS("FIRMWARE_LOADER_PRIVATE");
10
11extern struct firmware_fallback_config fw_fallback_config;
12extern struct device_attribute dev_attr_loading;
13
14#ifdef CONFIG_FW_LOADER_USER_HELPER
15/**
16 * struct firmware_fallback_config - firmware fallback configuration settings
17 *
18 * Helps describe and fine tune the fallback mechanism.
19 *
20 * @force_sysfs_fallback: force the sysfs fallback mechanism to be used
21 * as if one had enabled CONFIG_FW_LOADER_USER_HELPER_FALLBACK=y.
22 * Useful to help debug a CONFIG_FW_LOADER_USER_HELPER_FALLBACK=y
23 * functionality on a kernel where that config entry has been disabled.
24 * @ignore_sysfs_fallback: force to disable the sysfs fallback mechanism.
25 * This emulates the behaviour as if we had set the kernel
26 * config CONFIG_FW_LOADER_USER_HELPER=n.
27 * @old_timeout: for internal use
28 * @loading_timeout: the timeout to wait for the fallback mechanism before
29 * giving up, in seconds.
30 */
31struct firmware_fallback_config {
32 unsigned int force_sysfs_fallback;
33 unsigned int ignore_sysfs_fallback;
34 int old_timeout;
35 int loading_timeout;
36};
37
38/* These getters are vetted to use int properly */
39static inline int __firmware_loading_timeout(void)
40{
41 return fw_fallback_config.loading_timeout;
42}
43
44/* These setters are vetted to use int properly */
45static inline void __fw_fallback_set_timeout(int timeout)
46{
47 fw_fallback_config.loading_timeout = timeout;
48}
49#endif
50
51#ifdef CONFIG_FW_LOADER_SYSFS
52int register_sysfs_loader(void);
53void unregister_sysfs_loader(void);
54#if defined(CONFIG_FW_LOADER_USER_HELPER) && defined(CONFIG_SYSCTL)
55int register_firmware_config_sysctl(void);
56void unregister_firmware_config_sysctl(void);
57#else
58static inline int register_firmware_config_sysctl(void)
59{
60 return 0;
61}
62
63static inline void unregister_firmware_config_sysctl(void) { }
64#endif /* CONFIG_FW_LOADER_USER_HELPER && CONFIG_SYSCTL */
65#else /* CONFIG_FW_LOADER_SYSFS */
66static inline int register_sysfs_loader(void)
67{
68 return 0;
69}
70
71static inline void unregister_sysfs_loader(void)
72{
73}
74#endif /* CONFIG_FW_LOADER_SYSFS */
75
76struct fw_sysfs {
77 bool nowait;
78 struct device dev;
79 struct fw_priv *fw_priv;
80 struct firmware *fw;
81 void *fw_upload_priv;
82};
83#define to_fw_sysfs(__dev) container_of_const(__dev, struct fw_sysfs, dev)
84
85void __fw_load_abort(struct fw_priv *fw_priv);
86
87static inline void fw_load_abort(struct fw_sysfs *fw_sysfs)
88{
89 struct fw_priv *fw_priv = fw_sysfs->fw_priv;
90
91 __fw_load_abort(fw_priv);
92}
93
94struct fw_sysfs *
95fw_create_instance(struct firmware *firmware, const char *fw_name,
96 struct device *device, u32 opt_flags);
97
98#ifdef CONFIG_FW_UPLOAD
99extern struct device_attribute dev_attr_status;
100extern struct device_attribute dev_attr_error;
101extern struct device_attribute dev_attr_cancel;
102extern struct device_attribute dev_attr_remaining_size;
103
104int fw_upload_start(struct fw_sysfs *fw_sysfs);
105void fw_upload_free(struct fw_sysfs *fw_sysfs);
106umode_t fw_upload_is_visible(struct kobject *kobj, struct attribute *attr, int n);
107#else
108static inline int fw_upload_start(struct fw_sysfs *fw_sysfs)
109{
110 return 0;
111}
112
113static inline void fw_upload_free(struct fw_sysfs *fw_sysfs)
114{
115}
116#endif
117
118#endif /* __FIRMWARE_SYSFS_H */