1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_FIRMWARE_H
#define _LINUX_FIRMWARE_H
#include <linux/types.h>
#include <linux/compiler.h>
#include <linux/cleanup.h>
#include <linux/gfp.h>
#define FW_ACTION_NOUEVENT 0
#define FW_ACTION_UEVENT 1
struct firmware {
size_t size;
const u8 *data;
/* firmware loader private fields */
void *priv;
};
/**
* enum fw_upload_err - firmware upload error codes
* @FW_UPLOAD_ERR_NONE: returned to indicate success
* @FW_UPLOAD_ERR_HW_ERROR: error signalled by hardware, see kernel log
* @FW_UPLOAD_ERR_TIMEOUT: SW timed out on handshake with HW/firmware
* @FW_UPLOAD_ERR_CANCELED: upload was cancelled by the user
* @FW_UPLOAD_ERR_BUSY: there is an upload operation already in progress
* @FW_UPLOAD_ERR_INVALID_SIZE: invalid firmware image size
* @FW_UPLOAD_ERR_RW_ERROR: read or write to HW failed, see kernel log
* @FW_UPLOAD_ERR_WEAROUT: FLASH device is approaching wear-out, wait & retry
* @FW_UPLOAD_ERR_FW_INVALID: invalid firmware file
* @FW_UPLOAD_ERR_MAX: Maximum error code marker
*/
enum fw_upload_err {
FW_UPLOAD_ERR_NONE,
FW_UPLOAD_ERR_HW_ERROR,
FW_UPLOAD_ERR_TIMEOUT,
FW_UPLOAD_ERR_CANCELED,
FW_UPLOAD_ERR_BUSY,
FW_UPLOAD_ERR_INVALID_SIZE,
FW_UPLOAD_ERR_RW_ERROR,
FW_UPLOAD_ERR_WEAROUT,
FW_UPLOAD_ERR_FW_INVALID,
FW_UPLOAD_ERR_MAX
};
struct fw_upload {
void *dd_handle; /* reference to parent driver */
void *priv; /* firmware loader private fields */
};
/**
* struct fw_upload_ops - device specific operations to support firmware upload
* @prepare: Required: Prepare secure update
* @write: Required: The write() op receives the remaining
* size to be written and must return the actual
* size written or a negative error code. The write()
* op will be called repeatedly until all data is
* written.
* @poll_complete: Required: Check for the completion of the
* HW authentication/programming process.
* @cancel: Required: Request cancellation of update. This op
* is called from the context of a different kernel
* thread, so race conditions need to be considered.
* @cleanup: Optional: Complements the prepare()
* function and is called at the completion
* of the update, on success or failure, if the
* prepare function succeeded.
*/
struct fw_upload_ops {
enum fw_upload_err (*prepare)(struct fw_upload *fw_upload,
const u8 *data, u32 size);
enum fw_upload_err (*write)(struct fw_upload *fw_upload,
const u8 *data, u32 offset,
u32 size, u32 *written);
enum fw_upload_err (*poll_complete)(struct fw_upload *fw_upload);
void (*cancel)(struct fw_upload *fw_upload);
void (*cleanup)(struct fw_upload *fw_upload);
};
struct module;
struct device;
/*
* Built-in firmware functionality is only available if FW_LOADER=y, but not
* FW_LOADER=m
*/
#ifdef CONFIG_FW_LOADER
bool firmware_request_builtin(struct firmware *fw, const char *name);
#else
static inline bool firmware_request_builtin(struct firmware *fw,
const char *name)
{
return false;
}
#endif
#if IS_REACHABLE(CONFIG_FW_LOADER)
int request_firmware(const struct firmware **fw, const char *name,
struct device *device);
int firmware_request_nowarn(const struct firmware **fw, const char *name,
struct device *device);
int firmware_request_platform(const struct firmware **fw, const char *name,
struct device *device);
int request_firmware_nowait(
struct module *module, bool uevent,
const char *name, struct device *device, gfp_t gfp, void *context,
void (*cont)(const struct firmware *fw, void *context));
int request_firmware_direct(const struct firmware **fw, const char *name,
struct device *device);
int request_firmware_into_buf(const struct firmware **firmware_p,
const char *name, struct device *device, void *buf, size_t size);
int request_partial_firmware_into_buf(const struct firmware **firmware_p,
const char *name, struct device *device,
void *buf, size_t size, size_t offset);
void release_firmware(const struct firmware *fw);
#else
static inline int request_firmware(const struct firmware **fw,
const char *name,
struct device *device)
{
return -EINVAL;
}
static inline int firmware_request_nowarn(const struct firmware **fw,
const char *name,
struct device *device)
{
return -EINVAL;
}
static inline int firmware_request_platform(const struct firmware **fw,
const char *name,
struct device *device)
{
return -EINVAL;
}
static inline int request_firmware_nowait(
struct module *module, bool uevent,
const char *name, struct device *device, gfp_t gfp, void *context,
void (*cont)(const struct firmware *fw, void *context))
{
return -EINVAL;
}
static inline void release_firmware(const struct firmware *fw)
{
}
static inline int request_firmware_direct(const struct firmware **fw,
const char *name,
struct device *device)
{
return -EINVAL;
}
static inline int request_firmware_into_buf(const struct firmware **firmware_p,
const char *name, struct device *device, void *buf, size_t size)
{
return -EINVAL;
}
static inline int request_partial_firmware_into_buf
(const struct firmware **firmware_p,
const char *name,
struct device *device,
void *buf, size_t size, size_t offset)
{
return -EINVAL;
}
#endif
#ifdef CONFIG_FW_UPLOAD
struct fw_upload *
firmware_upload_register(struct module *module, struct device *parent,
const char *name, const struct fw_upload_ops *ops,
void *dd_handle);
void firmware_upload_unregister(struct fw_upload *fw_upload);
#else
static inline struct fw_upload *
firmware_upload_register(struct module *module, struct device *parent,
const char *name, const struct fw_upload_ops *ops,
void *dd_handle)
{
return ERR_PTR(-EINVAL);
}
static inline void firmware_upload_unregister(struct fw_upload *fw_upload)
{
}
#endif
int firmware_request_cache(struct device *device, const char *name);
DEFINE_FREE(firmware, struct firmware *, release_firmware(_T))
#endif
|
