1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_FIRMWARE_H
3 #define _LINUX_FIRMWARE_H
5 #include <linux/types.h>
6 #include <linux/compiler.h>
7 #include <linux/cleanup.h>
10 #define FW_ACTION_NOUEVENT 0
11 #define FW_ACTION_UEVENT 1
17 /* firmware loader private fields */
22 * enum fw_upload_err - firmware upload error codes
23 * @FW_UPLOAD_ERR_NONE: returned to indicate success
24 * @FW_UPLOAD_ERR_HW_ERROR: error signalled by hardware, see kernel log
25 * @FW_UPLOAD_ERR_TIMEOUT: SW timed out on handshake with HW/firmware
26 * @FW_UPLOAD_ERR_CANCELED: upload was cancelled by the user
27 * @FW_UPLOAD_ERR_BUSY: there is an upload operation already in progress
28 * @FW_UPLOAD_ERR_INVALID_SIZE: invalid firmware image size
29 * @FW_UPLOAD_ERR_RW_ERROR: read or write to HW failed, see kernel log
30 * @FW_UPLOAD_ERR_WEAROUT: FLASH device is approaching wear-out, wait & retry
31 * @FW_UPLOAD_ERR_FW_INVALID: invalid firmware file
32 * @FW_UPLOAD_ERR_MAX: Maximum error code marker
36 FW_UPLOAD_ERR_HW_ERROR,
37 FW_UPLOAD_ERR_TIMEOUT,
38 FW_UPLOAD_ERR_CANCELED,
40 FW_UPLOAD_ERR_INVALID_SIZE,
41 FW_UPLOAD_ERR_RW_ERROR,
42 FW_UPLOAD_ERR_WEAROUT,
43 FW_UPLOAD_ERR_FW_INVALID,
48 void *dd_handle; /* reference to parent driver */
49 void *priv; /* firmware loader private fields */
53 * struct fw_upload_ops - device specific operations to support firmware upload
54 * @prepare: Required: Prepare secure update
55 * @write: Required: The write() op receives the remaining
56 * size to be written and must return the actual
57 * size written or a negative error code. The write()
58 * op will be called repeatedly until all data is
60 * @poll_complete: Required: Check for the completion of the
61 * HW authentication/programming process.
62 * @cancel: Required: Request cancellation of update. This op
63 * is called from the context of a different kernel
64 * thread, so race conditions need to be considered.
65 * @cleanup: Optional: Complements the prepare()
66 * function and is called at the completion
67 * of the update, on success or failure, if the
68 * prepare function succeeded.
70 struct fw_upload_ops {
71 enum fw_upload_err (*prepare)(struct fw_upload *fw_upload,
72 const u8 *data, u32 size);
73 enum fw_upload_err (*write)(struct fw_upload *fw_upload,
74 const u8 *data, u32 offset,
75 u32 size, u32 *written);
76 enum fw_upload_err (*poll_complete)(struct fw_upload *fw_upload);
77 void (*cancel)(struct fw_upload *fw_upload);
78 void (*cleanup)(struct fw_upload *fw_upload);
85 * Built-in firmware functionality is only available if FW_LOADER=y, but not
88 #ifdef CONFIG_FW_LOADER
89 bool firmware_request_builtin(struct firmware *fw, const char *name);
91 static inline bool firmware_request_builtin(struct firmware *fw,
98 #if IS_REACHABLE(CONFIG_FW_LOADER)
99 int request_firmware(const struct firmware **fw, const char *name,
100 struct device *device);
101 int firmware_request_nowait_nowarn(
102 struct module *module, const char *name,
103 struct device *device, gfp_t gfp, void *context,
104 void (*cont)(const struct firmware *fw, void *context));
105 int firmware_request_nowarn(const struct firmware **fw, const char *name,
106 struct device *device);
107 int firmware_request_platform(const struct firmware **fw, const char *name,
108 struct device *device);
109 int request_firmware_nowait(
110 struct module *module, bool uevent,
111 const char *name, struct device *device, gfp_t gfp, void *context,
112 void (*cont)(const struct firmware *fw, void *context));
113 int request_firmware_direct(const struct firmware **fw, const char *name,
114 struct device *device);
115 int request_firmware_into_buf(const struct firmware **firmware_p,
116 const char *name, struct device *device, void *buf, size_t size);
117 int request_partial_firmware_into_buf(const struct firmware **firmware_p,
118 const char *name, struct device *device,
119 void *buf, size_t size, size_t offset);
121 void release_firmware(const struct firmware *fw);
123 static inline int request_firmware(const struct firmware **fw,
125 struct device *device)
130 static inline int firmware_request_nowait_nowarn(
131 struct module *module, const char *name,
132 struct device *device, gfp_t gfp, void *context,
133 void (*cont)(const struct firmware *fw, void *context))
138 static inline int firmware_request_nowarn(const struct firmware **fw,
140 struct device *device)
145 static inline int firmware_request_platform(const struct firmware **fw,
147 struct device *device)
152 static inline int request_firmware_nowait(
153 struct module *module, bool uevent,
154 const char *name, struct device *device, gfp_t gfp, void *context,
155 void (*cont)(const struct firmware *fw, void *context))
160 static inline void release_firmware(const struct firmware *fw)
164 static inline int request_firmware_direct(const struct firmware **fw,
166 struct device *device)
171 static inline int request_firmware_into_buf(const struct firmware **firmware_p,
172 const char *name, struct device *device, void *buf, size_t size)
177 static inline int request_partial_firmware_into_buf
178 (const struct firmware **firmware_p,
180 struct device *device,
181 void *buf, size_t size, size_t offset)
188 #ifdef CONFIG_FW_UPLOAD
191 firmware_upload_register(struct module *module, struct device *parent,
192 const char *name, const struct fw_upload_ops *ops,
194 void firmware_upload_unregister(struct fw_upload *fw_upload);
198 static inline struct fw_upload *
199 firmware_upload_register(struct module *module, struct device *parent,
200 const char *name, const struct fw_upload_ops *ops,
203 return ERR_PTR(-EINVAL);
206 static inline void firmware_upload_unregister(struct fw_upload *fw_upload)
212 int firmware_request_cache(struct device *device, const char *name);
214 DEFINE_FREE(firmware, struct firmware *, release_firmware(_T))