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 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 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 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 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 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 } 115 116 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 125 126 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