1 /*
2 * Copyright (c) 2018-2019, 2021 The Linux Foundation. All rights reserved.
3 * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
4 *
5 * Permission to use, copy, modify, and/or distribute this software for
6 * any purpose with or without fee is hereby granted, provided that the
7 * above copyright notice and this permission notice appear in all
8 * copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
11 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
12 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
13 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
14 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
15 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
16 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
17 * PERFORMANCE OF THIS SOFTWARE.
18 */
19
20 #include <linux/firmware.h>
21 #include "qdf_file.h"
22 #include "qdf_mem.h"
23 #include "qdf_module.h"
24 #include "qdf_status.h"
25 #include "qdf_trace.h"
26 #include "qdf_types.h"
27
28 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 18, 0))
29 static inline
qdf_firmware_request_nowarn(const struct firmware ** fw,const char * name,struct device * device)30 int qdf_firmware_request_nowarn(const struct firmware **fw,
31 const char *name,
32 struct device *device)
33 {
34 return firmware_request_nowarn(fw, name, device);
35 }
36 #else
37 static inline
qdf_firmware_request_nowarn(const struct firmware ** fw,const char * name,struct device * device)38 int qdf_firmware_request_nowarn(const struct firmware **fw,
39 const char *name,
40 struct device *device)
41 {
42 return request_firmware(fw, name, device);
43 }
44 #endif
45
46
qdf_file_read(const char * path,char ** out_buf)47 QDF_STATUS qdf_file_read(const char *path, char **out_buf)
48 {
49 int errno;
50 const struct firmware *fw;
51 char *buf;
52
53 *out_buf = NULL;
54
55 errno = qdf_firmware_request_nowarn(&fw, path, NULL);
56 if (errno) {
57 qdf_err("Failed to read file %s", path);
58 return QDF_STATUS_E_FAILURE;
59 }
60
61 /* qdf_mem_malloc zeros new memory; +1 size ensures null-termination */
62 buf = qdf_mem_malloc(fw->size + 1);
63 if (!buf) {
64 release_firmware(fw);
65 return QDF_STATUS_E_NOMEM;
66 }
67
68 qdf_mem_copy(buf, fw->data, fw->size);
69 release_firmware(fw);
70 *out_buf = buf;
71
72 return QDF_STATUS_SUCCESS;
73 }
74 qdf_export_symbol(qdf_file_read);
75
qdf_file_buf_free(char * file_buf)76 void qdf_file_buf_free(char *file_buf)
77 {
78 QDF_BUG(file_buf);
79 if (!file_buf)
80 return;
81
82 qdf_mem_free(file_buf);
83 }
84 qdf_export_symbol(qdf_file_buf_free);
85
86 #ifdef QCA_WIFI_MODULE_PARAMS_FROM_INI
qdf_module_param_file_read(const char * path,char ** out_buf)87 QDF_STATUS qdf_module_param_file_read(const char *path, char **out_buf)
88 {
89 int errno;
90 const struct firmware *fw;
91 char *buf;
92
93 *out_buf = NULL;
94 errno = qdf_firmware_request_nowarn(&fw, path, NULL);
95 if (errno) {
96 qdf_err("Failed to read file %s", path);
97 return QDF_STATUS_E_FAILURE;
98 }
99
100 /* qdf_untracked_mem_malloc zeros new memory; +1 size
101 * ensures null-termination
102 */
103 buf = qdf_untracked_mem_malloc(fw->size + 1);
104 if (!buf) {
105 release_firmware(fw);
106 return QDF_STATUS_E_NOMEM;
107 }
108
109 qdf_mem_copy(buf, fw->data, fw->size);
110 release_firmware(fw);
111 *out_buf = buf;
112
113 return QDF_STATUS_SUCCESS;
114 }
115
qdf_module_param_file_free(char * file_buf)116 void qdf_module_param_file_free(char *file_buf)
117 {
118 QDF_BUG(file_buf);
119 if (!file_buf)
120 return;
121
122 qdf_untracked_mem_free(file_buf);
123 }
124 #endif
125
qdf_file_read_bytes(const char * path,char ** out_buf,unsigned int * out_buff_size)126 QDF_STATUS qdf_file_read_bytes(const char *path, char **out_buf,
127 unsigned int *out_buff_size)
128 {
129 int errno;
130 const struct firmware *fw;
131 char *buf;
132
133 *out_buf = NULL;
134
135 errno = qdf_firmware_request_nowarn(&fw, path, NULL);
136 if (errno) {
137 qdf_err("Failed to read file %s", path);
138 return QDF_STATUS_E_FAILURE;
139 }
140
141 buf = qdf_mem_malloc(fw->size);
142 if (!buf) {
143 release_firmware(fw);
144 return QDF_STATUS_E_NOMEM;
145 }
146
147 qdf_mem_copy(buf, fw->data, fw->size);
148 *out_buff_size = fw->size;
149 *out_buf = buf;
150 release_firmware(fw);
151
152 return QDF_STATUS_SUCCESS;
153 }
154
155 qdf_export_symbol(qdf_file_read_bytes);
156