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