1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_FIRMWARE_H 3 #define _LINUX_FIRMWARE_H 4 5 #include <linux/types.h> 6 #include <linux/compiler.h> 7 #include <linux/gfp.h> 8 9 #define FW_ACTION_NOHOTPLUG 0 10 #define FW_ACTION_HOTPLUG 1 11 12 struct firmware { 13 size_t size; 14 const u8 *data; 15 struct page **pages; 16 17 /* firmware loader private fields */ 18 void *priv; 19 }; 20 21 struct module; 22 struct device; 23 24 struct builtin_fw { 25 char *name; 26 void *data; 27 unsigned long size; 28 }; 29 30 /* We have to play tricks here much like stringify() to get the 31 __COUNTER__ macro to be expanded as we want it */ 32 #define __fw_concat1(x, y) x##y 33 #define __fw_concat(x, y) __fw_concat1(x, y) 34 35 #define DECLARE_BUILTIN_FIRMWARE(name, blob) \ 36 DECLARE_BUILTIN_FIRMWARE_SIZE(name, &(blob), sizeof(blob)) 37 38 #define DECLARE_BUILTIN_FIRMWARE_SIZE(name, blob, size) \ 39 static const struct builtin_fw __fw_concat(__builtin_fw,__COUNTER__) \ 40 __used __section(.builtin_fw) = { name, blob, size } 41 42 #if defined(CONFIG_FW_LOADER) || (defined(CONFIG_FW_LOADER_MODULE) && defined(MODULE)) 43 int request_firmware(const struct firmware **fw, const char *name, 44 struct device *device); 45 int firmware_request_nowarn(const struct firmware **fw, const char *name, 46 struct device *device); 47 int request_firmware_nowait( 48 struct module *module, bool uevent, 49 const char *name, struct device *device, gfp_t gfp, void *context, 50 void (*cont)(const struct firmware *fw, void *context)); 51 int request_firmware_direct(const struct firmware **fw, const char *name, 52 struct device *device); 53 int request_firmware_into_buf(const struct firmware **firmware_p, 54 const char *name, struct device *device, void *buf, size_t size); 55 56 void release_firmware(const struct firmware *fw); 57 #else 58 static inline int request_firmware(const struct firmware **fw, 59 const char *name, 60 struct device *device) 61 { 62 return -EINVAL; 63 } 64 65 static inline int firmware_request_nowarn(const struct firmware **fw, 66 const char *name, 67 struct device *device) 68 { 69 return -EINVAL; 70 } 71 72 static inline int request_firmware_nowait( 73 struct module *module, bool uevent, 74 const char *name, struct device *device, gfp_t gfp, void *context, 75 void (*cont)(const struct firmware *fw, void *context)) 76 { 77 return -EINVAL; 78 } 79 80 static inline void release_firmware(const struct firmware *fw) 81 { 82 } 83 84 static inline int request_firmware_direct(const struct firmware **fw, 85 const char *name, 86 struct device *device) 87 { 88 return -EINVAL; 89 } 90 91 static inline int request_firmware_into_buf(const struct firmware **firmware_p, 92 const char *name, struct device *device, void *buf, size_t size) 93 { 94 return -EINVAL; 95 } 96 97 #endif 98 99 int firmware_request_cache(struct device *device, const char *name); 100 101 #endif 102
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