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TOMOYO Linux Cross Reference
Linux/include/linux/firmware.h

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  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 
 16         /* firmware loader private fields */
 17         void *priv;
 18 };
 19 
 20 struct module;
 21 struct device;
 22 
 23 struct builtin_fw {
 24         char *name;
 25         void *data;
 26         unsigned long size;
 27 };
 28 
 29 /* We have to play tricks here much like stringify() to get the
 30    __COUNTER__ macro to be expanded as we want it */
 31 #define __fw_concat1(x, y) x##y
 32 #define __fw_concat(x, y) __fw_concat1(x, y)
 33 
 34 #define DECLARE_BUILTIN_FIRMWARE(name, blob)                                 \
 35         DECLARE_BUILTIN_FIRMWARE_SIZE(name, &(blob), sizeof(blob))
 36 
 37 #define DECLARE_BUILTIN_FIRMWARE_SIZE(name, blob, size)                      \
 38         static const struct builtin_fw __fw_concat(__builtin_fw,__COUNTER__) \
 39         __used __section(.builtin_fw) = { name, blob, size }
 40 
 41 #if defined(CONFIG_FW_LOADER) || (defined(CONFIG_FW_LOADER_MODULE) && defined(MODULE))
 42 int request_firmware(const struct firmware **fw, const char *name,
 43                      struct device *device);
 44 int firmware_request_nowarn(const struct firmware **fw, const char *name,
 45                             struct device *device);
 46 int firmware_request_platform(const struct firmware **fw, const char *name,
 47                               struct device *device);
 48 int request_firmware_nowait(
 49         struct module *module, bool uevent,
 50         const char *name, struct device *device, gfp_t gfp, void *context,
 51         void (*cont)(const struct firmware *fw, void *context));
 52 int request_firmware_direct(const struct firmware **fw, const char *name,
 53                             struct device *device);
 54 int request_firmware_into_buf(const struct firmware **firmware_p,
 55         const char *name, struct device *device, void *buf, size_t size);
 56 
 57 void release_firmware(const struct firmware *fw);
 58 #else
 59 static inline int request_firmware(const struct firmware **fw,
 60                                    const char *name,
 61                                    struct device *device)
 62 {
 63         return -EINVAL;
 64 }
 65 
 66 static inline int firmware_request_nowarn(const struct firmware **fw,
 67                                           const char *name,
 68                                           struct device *device)
 69 {
 70         return -EINVAL;
 71 }
 72 
 73 static inline int firmware_request_platform(const struct firmware **fw,
 74                                             const char *name,
 75                                             struct device *device)
 76 {
 77         return -EINVAL;
 78 }
 79 
 80 static inline int request_firmware_nowait(
 81         struct module *module, bool uevent,
 82         const char *name, struct device *device, gfp_t gfp, void *context,
 83         void (*cont)(const struct firmware *fw, void *context))
 84 {
 85         return -EINVAL;
 86 }
 87 
 88 static inline void release_firmware(const struct firmware *fw)
 89 {
 90 }
 91 
 92 static inline int request_firmware_direct(const struct firmware **fw,
 93                                           const char *name,
 94                                           struct device *device)
 95 {
 96         return -EINVAL;
 97 }
 98 
 99 static inline int request_firmware_into_buf(const struct firmware **firmware_p,
100         const char *name, struct device *device, void *buf, size_t size)
101 {
102         return -EINVAL;
103 }
104 
105 #endif
106 
107 int firmware_request_cache(struct device *device, const char *name);
108 
109 #endif
110 

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