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Diffstat (limited to 'drivers/base/firmware_loader/fallback.h')
| -rw-r--r-- | drivers/base/firmware_loader/fallback.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/drivers/base/firmware_loader/fallback.h b/drivers/base/firmware_loader/fallback.h new file mode 100644 index 000000000000..dfebc644ed35 --- /dev/null +++ b/drivers/base/firmware_loader/fallback.h @@ -0,0 +1,67 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __FIRMWARE_FALLBACK_H +#define __FIRMWARE_FALLBACK_H + +#include <linux/firmware.h> +#include <linux/device.h> + +/** + * struct firmware_fallback_config - firmware fallback configuratioon settings + * + * Helps describe and fine tune the fallback mechanism. + * + * @force_sysfs_fallback: force the sysfs fallback mechanism to be used + * as if one had enabled CONFIG_FW_LOADER_USER_HELPER_FALLBACK=y. + * Useful to help debug a CONFIG_FW_LOADER_USER_HELPER_FALLBACK=y + * functionality on a kernel where that config entry has been disabled. + * @ignore_sysfs_fallback: force to disable the sysfs fallback mechanism. + * This emulates the behaviour as if we had set the kernel + * config CONFIG_FW_LOADER_USER_HELPER=n. + * @old_timeout: for internal use + * @loading_timeout: the timeout to wait for the fallback mechanism before + * giving up, in seconds. + */ +struct firmware_fallback_config { + unsigned int force_sysfs_fallback; + unsigned int ignore_sysfs_fallback; + int old_timeout; + int loading_timeout; +}; + +#ifdef CONFIG_FW_LOADER_USER_HELPER +int fw_sysfs_fallback(struct firmware *fw, const char *name, + struct device *device, + unsigned int opt_flags, + int ret); +void kill_pending_fw_fallback_reqs(bool only_kill_custom); + +void fw_fallback_set_cache_timeout(void); +void fw_fallback_set_default_timeout(void); + +int register_sysfs_loader(void); +void unregister_sysfs_loader(void); +#else /* CONFIG_FW_LOADER_USER_HELPER */ +static inline int fw_sysfs_fallback(struct firmware *fw, const char *name, + struct device *device, + unsigned int opt_flags, + int ret) +{ + /* Keep carrying over the same error */ + return ret; +} + +static inline void kill_pending_fw_fallback_reqs(bool only_kill_custom) { } +static inline void fw_fallback_set_cache_timeout(void) { } +static inline void fw_fallback_set_default_timeout(void) { } + +static inline int register_sysfs_loader(void) +{ + return 0; +} + +static inline void unregister_sysfs_loader(void) +{ +} +#endif /* CONFIG_FW_LOADER_USER_HELPER */ + +#endif /* __FIRMWARE_FALLBACK_H */ |