1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __FIRMWARE_FALLBACK_H 3 #define __FIRMWARE_FALLBACK_H 4 5 #include <linux/firmware.h> 6 #include <linux/device.h> 7 8 #include "firmware.h" 9 10 /** 11 * struct firmware_fallback_config - firmware fallback configuration settings 12 * 13 * Helps describe and fine tune the fallback mechanism. 14 * 15 * @force_sysfs_fallback: force the sysfs fallback mechanism to be used 16 * as if one had enabled CONFIG_FW_LOADER_USER_HELPER_FALLBACK=y. 17 * Useful to help debug a CONFIG_FW_LOADER_USER_HELPER_FALLBACK=y 18 * functionality on a kernel where that config entry has been disabled. 19 * @ignore_sysfs_fallback: force to disable the sysfs fallback mechanism. 20 * This emulates the behaviour as if we had set the kernel 21 * config CONFIG_FW_LOADER_USER_HELPER=n. 22 * @old_timeout: for internal use 23 * @loading_timeout: the timeout to wait for the fallback mechanism before 24 * giving up, in seconds. 25 */ 26 struct firmware_fallback_config { 27 unsigned int force_sysfs_fallback; 28 unsigned int ignore_sysfs_fallback; 29 int old_timeout; 30 int loading_timeout; 31 }; 32 33 #ifdef CONFIG_FW_LOADER_USER_HELPER 34 int fw_sysfs_fallback(struct firmware *fw, const char *name, 35 struct device *device, 36 enum fw_opt opt_flags, 37 int ret); 38 void kill_pending_fw_fallback_reqs(bool only_kill_custom); 39 40 void fw_fallback_set_cache_timeout(void); 41 void fw_fallback_set_default_timeout(void); 42 43 int register_sysfs_loader(void); 44 void unregister_sysfs_loader(void); 45 #else /* CONFIG_FW_LOADER_USER_HELPER */ 46 static inline int fw_sysfs_fallback(struct firmware *fw, const char *name, 47 struct device *device, 48 enum fw_opt opt_flags, 49 int ret) 50 { 51 /* Keep carrying over the same error */ 52 return ret; 53 } 54 55 static inline void kill_pending_fw_fallback_reqs(bool only_kill_custom) { } 56 static inline void fw_fallback_set_cache_timeout(void) { } 57 static inline void fw_fallback_set_default_timeout(void) { } 58 59 static inline int register_sysfs_loader(void) 60 { 61 return 0; 62 } 63 64 static inline void unregister_sysfs_loader(void) 65 { 66 } 67 #endif /* CONFIG_FW_LOADER_USER_HELPER */ 68 69 #endif /* __FIRMWARE_FALLBACK_H */ 70