1 /******************************************************************************* 2 **+--------------------------------------------------------------------------+** 3 **| |** 4 **| Copyright 1998-2008 Texas Instruments, Inc. - http://www.ti.com/ |** 5 **| |** 6 **| Licensed under the Apache License, Version 2.0 (the "License"); |** 7 **| you may not use this file except in compliance with the License. |** 8 **| You may obtain a copy of the License at |** 9 **| |** 10 **| http://www.apache.org/licenses/LICENSE-2.0 |** 11 **| |** 12 **| Unless required by applicable law or agreed to in writing, software |** 13 **| distributed under the License is distributed on an "AS IS" BASIS, |** 14 **| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |** 15 **| See the License for the specific language governing permissions and |** 16 **| limitations under the License. |** 17 **| |** 18 **+--------------------------------------------------------------------------+** 19 *******************************************************************************/ 20 21 22 /****************************************************************************************************/ 23 /* */ 24 /* MODULE: dbg_module.c */ 25 /* PURPOSE: Handle the debug messages */ 26 /* Note: This module is for LINUX compilation only! */ 27 /* */ 28 /****************************************************************************************************/ 29 30 31 #include <stdarg.h> 32 #include <unistd.h> 33 #include <stdlib.h> 34 #include <termios.h> 35 #include <fcntl.h> 36 #include <errno.h> 37 #include <signal.h> 38 #include <fcntl.h> 39 #include <stdarg.h> 40 41 #include <sys/time.h> 42 #include <sys/stat.h> 43 #include <sys/types.h> 44 #include <sys/ioctl.h> 45 #include <sys/socket.h> 46 #include <sys/resource.h> 47 48 #include "ipc.h" 49 #include "ticon.h" 50 #include "console.h" 51 #include "dbg_module.h" 52 #include "eth_utils.h" 53 #include "debug_module_ioctl.h" 54 55 /************/ 56 /* Defines */ 57 /**********/ 58 59 #define DEBUG_MODULE_BUFFER_SIZE (255) 60 61 /*********************/ 62 /* Global variables */ 63 /*******************/ 64 65 int debug_module_dev_file = -1; 66 int debug_module_process_pid = 0; 67 68 /********************************/ 69 /* static functions prototypes */ 70 /******************************/ 71 72 unsigned char file_exists(const char *file_name); 73 74 /**************/ 75 /* Functions */ 76 /************/ 77 78 /************************************************************************ 79 * debug_module_init * 80 ************************************************************************ 81 DESCRIPTION: Initialize the debug module user mode process 82 83 CONTEXT : main process only! 84 ************************************************************************/ 85 void debug_module_init(void) 86 { 87 int return_value; 88 89 /*********************************/ 90 /* Create the debug device file */ 91 /*******************************/ 92 93 if (!file_exists("/dev/debug_msg_dev")) 94 { 95 /* Create the debug device file */ 96 return_value = system("mknod /dev/debug_msg_dev c 254 0"); 97 } 98 99 debug_module_dev_file = open("/dev/debug_msg_dev", O_RDWR); 100 101 if (debug_module_dev_file == -1) 102 { 103 console_printf_terminal("Debug module, error opening \"/dev/debug_msg_dev\"\n"); 104 105 return; 106 } 107 108 /* Create another instance of this process */ 109 debug_module_process_pid = fork(); 110 111 if (debug_module_process_pid == 0) 112 { 113 /******************/ 114 /* Child process */ 115 /****************/ 116 117 unsigned char bytes_read; 118 unsigned char ioctl_return_size; 119 t_ioctol1_format ioctl_data; 120 unsigned char in_debug_buffer[DEBUG_MODULE_BUFFER_SIZE + 1]; 121 122 /* Set the priority of this process to the lowest */ 123 /* setpriority(PRIO_PROCESS, getpid(), -20);*/ 124 125 console_printf_terminal("Debug module, Hello from child process (pid = %d).\n", getpid()); 126 127 /*******************************/ 128 /* Prepare the ioctl's fields */ 129 /*****************************/ 130 131 ioctl_data.return_size = &ioctl_return_size; 132 ioctl_data.buffer = (in_debug_buffer + 1); 133 ioctl_data.buffer_size = DEBUG_MODULE_BUFFER_SIZE; 134 135 while (TRUE) 136 { 137 /*console_printf_terminal("Debug module, before ioctl\n");*/ 138 139 /* Read data from device file - blocking command */ 140 return_value = ioctl(debug_module_dev_file, 10, &ioctl_data); 141 142 /*console_printf_terminal("Debug module, after ioctl (%d)\n", return_value);*/ 143 144 if (return_value != -1) 145 { 146 bytes_read = ioctl_return_size; 147 148 if (bytes_read > 0) 149 { 150 /* Mark that this is log message */ 151 in_debug_buffer[0] = 0; 152 153 /* Put '0' in the end of the string */ 154 in_debug_buffer[bytes_read + 1] = 0; 155 156 console_send_buffer_to_host(ETHERNET_UTILS_LOGGER_MODULE_ID, in_debug_buffer, (bytes_read + 1)); 157 } 158 } 159 else 160 { 161 console_printf_terminal("Debug module, error reading from device file.\n"); 162 } 163 } 164 } 165 } 166 167 /************************************************************************ 168 * debug_module_deinit * 169 ************************************************************************ 170 DESCRIPTION: Deinitialize the debug module user mode process 171 172 CONTEXT : main process only! 173 ************************************************************************/ 174 void debug_module_deinit(void) 175 { 176 if (debug_module_process_pid) 177 { 178 kill(debug_module_process_pid, SIGKILL); 179 } 180 } 181 182 /************************************************************************ 183 * debug_module_get_queue_status * 184 ************************************************************************ 185 DESCRIPTION: Gets the status of the debug module queue 186 187 CONTEXT : main process only! 188 ************************************************************************/ 189 190 struct q_report { 191 unsigned int q_size; 192 unsigned int q_used; 193 unsigned int q_overrun; 194 }; 195 196 #define QUEUE_STATUS_LEN (12) 197 void debug_module_get_queue_status(void) 198 { 199 int return_value; 200 char status_result[QUEUE_STATUS_LEN + 1]; 201 struct q_report report; 202 203 /* Read data from device file - blocking command */ 204 return_value = ioctl(debug_module_dev_file, 11, &report); 205 206 if (return_value != -1) 207 { 208 /* console_printf_terminal("Debug module, debug_module_get_queue_status. (size = %d, used = %d, overrun = %d)\n", report.q_size , report.q_used, report.q_overrun); */ 209 210 memcpy(status_result + 1, &report, sizeof(report)); 211 212 /* Mark that this is report message */ 213 status_result[0] = 1; 214 215 console_send_buffer_to_host(ETHERNET_UTILS_LOGGER_MODULE_ID, (tiUINT8*) status_result, QUEUE_STATUS_LEN + 1); 216 } 217 else 218 { 219 console_printf_terminal("Debug module, error reading from device file.\n"); 220 } 221 } 222 223 /************************************************************************ 224 * file_exists * 225 ************************************************************************ 226 DESCRIPTION: Check if a specific file exists 227 228 CONTEXT : All process. 229 230 Returns: TRUE if the file exists (FALSE otherwise). 231 ************************************************************************/ 232 unsigned char file_exists(const char *file_name) 233 { 234 int test_file; 235 tiBOOL result = FALSE;; 236 237 /* Try to open the file */ 238 test_file = open(file_name, O_RDONLY); 239 240 if (test_file != -1) 241 { 242 /*************************************************/ 243 /* The file was successfullu opened - it exists */ 244 /***********************************************/ 245 246 close(test_file); 247 248 result = TRUE; 249 } 250 251 return result; 252 } 253 254
