1 /* 2 * include/asm-s390/debug.h 3 * S/390 debug facility 4 * 5 * Copyright (C) 1999, 2000 IBM Deutschland Entwicklung GmbH, 6 * IBM Corporation 7 */ 8 9 #ifndef DEBUG_H 10 #define DEBUG_H 11 12 #include <linux/fs.h> 13 14 /* Note: 15 * struct __debug_entry must be defined outside of #ifdef __KERNEL__ 16 * in order to allow a user program to analyze the 'raw'-view. 17 */ 18 19 struct __debug_entry{ 20 union { 21 struct { 22 unsigned long long clock:52; 23 unsigned long long exception:1; 24 unsigned long long level:3; 25 unsigned long long cpuid:8; 26 } fields; 27 28 unsigned long long stck; 29 } id; 30 void* caller; 31 } __attribute__((packed)); 32 33 34 #define __DEBUG_FEATURE_VERSION 2 /* version of debug feature */ 35 36 #ifdef __KERNEL__ 37 #include <linux/string.h> 38 #include <linux/spinlock.h> 39 #include <linux/kernel.h> 40 #include <linux/time.h> 41 42 #define DEBUG_MAX_LEVEL 6 /* debug levels range from 0 to 6 */ 43 #define DEBUG_OFF_LEVEL -1 /* level where debug is switched off */ 44 #define DEBUG_FLUSH_ALL -1 /* parameter to flush all areas */ 45 #define DEBUG_MAX_VIEWS 10 /* max number of views in proc fs */ 46 #define DEBUG_MAX_NAME_LEN 64 /* max length for a debugfs file name */ 47 #define DEBUG_DEFAULT_LEVEL 3 /* initial debug level */ 48 49 #define DEBUG_DIR_ROOT "s390dbf" /* name of debug root directory in proc fs */ 50 51 #define DEBUG_DATA(entry) (char*)(entry + 1) /* data is stored behind */ 52 /* the entry information */ 53 54 typedef struct __debug_entry debug_entry_t; 55 56 struct debug_view; 57 58 typedef struct debug_info { 59 struct debug_info* next; 60 struct debug_info* prev; 61 atomic_t ref_count; 62 spinlock_t lock; 63 int level; 64 int nr_areas; 65 int pages_per_area; 66 int buf_size; 67 int entry_size; 68 debug_entry_t*** areas; 69 int active_area; 70 int *active_pages; 71 int *active_entries; 72 struct dentry* debugfs_root_entry; 73 struct dentry* debugfs_entries[DEBUG_MAX_VIEWS]; 74 struct debug_view* views[DEBUG_MAX_VIEWS]; 75 char name[DEBUG_MAX_NAME_LEN]; 76 umode_t mode; 77 } debug_info_t; 78 79 typedef int (debug_header_proc_t) (debug_info_t* id, 80 struct debug_view* view, 81 int area, 82 debug_entry_t* entry, 83 char* out_buf); 84 85 typedef int (debug_format_proc_t) (debug_info_t* id, 86 struct debug_view* view, char* out_buf, 87 const char* in_buf); 88 typedef int (debug_prolog_proc_t) (debug_info_t* id, 89 struct debug_view* view, 90 char* out_buf); 91 typedef int (debug_input_proc_t) (debug_info_t* id, 92 struct debug_view* view, 93 struct file* file, 94 const char __user *user_buf, 95 size_t in_buf_size, loff_t* offset); 96 97 int debug_dflt_header_fn(debug_info_t* id, struct debug_view* view, 98 int area, debug_entry_t* entry, char* out_buf); 99 100 struct debug_view { 101 char name[DEBUG_MAX_NAME_LEN]; 102 debug_prolog_proc_t* prolog_proc; 103 debug_header_proc_t* header_proc; 104 debug_format_proc_t* format_proc; 105 debug_input_proc_t* input_proc; 106 void* private_data; 107 }; 108 109 extern struct debug_view debug_hex_ascii_view; 110 extern struct debug_view debug_raw_view; 111 extern struct debug_view debug_sprintf_view; 112 113 /* do NOT use the _common functions */ 114 115 debug_entry_t* debug_event_common(debug_info_t* id, int level, 116 const void* data, int length); 117 118 debug_entry_t* debug_exception_common(debug_info_t* id, int level, 119 const void* data, int length); 120 121 /* Debug Feature API: */ 122 123 debug_info_t *debug_register(const char *name, int pages, int nr_areas, 124 int buf_size); 125 126 debug_info_t *debug_register_mode(const char *name, int pages, int nr_areas, 127 int buf_size, umode_t mode, uid_t uid, 128 gid_t gid); 129 130 void debug_unregister(debug_info_t* id); 131 132 void debug_set_level(debug_info_t* id, int new_level); 133 134 void debug_stop_all(void); 135 136 static inline debug_entry_t* 137 debug_event(debug_info_t* id, int level, void* data, int length) 138 { 139 if ((!id) || (level > id->level) || (id->pages_per_area == 0)) 140 return NULL; 141 return debug_event_common(id,level,data,length); 142 } 143 144 static inline debug_entry_t* 145 debug_int_event(debug_info_t* id, int level, unsigned int tag) 146 { 147 unsigned int t=tag; 148 if ((!id) || (level > id->level) || (id->pages_per_area == 0)) 149 return NULL; 150 return debug_event_common(id,level,&t,sizeof(unsigned int)); 151 } 152 153 static inline debug_entry_t * 154 debug_long_event (debug_info_t* id, int level, unsigned long tag) 155 { 156 unsigned long t=tag; 157 if ((!id) || (level > id->level) || (id->pages_per_area == 0)) 158 return NULL; 159 return debug_event_common(id,level,&t,sizeof(unsigned long)); 160 } 161 162 static inline debug_entry_t* 163 debug_text_event(debug_info_t* id, int level, const char* txt) 164 { 165 if ((!id) || (level > id->level) || (id->pages_per_area == 0)) 166 return NULL; 167 return debug_event_common(id,level,txt,strlen(txt)); 168 } 169 170 /* 171 * IMPORTANT: Use "%s" in sprintf format strings with care! Only pointers are 172 * stored in the s390dbf. See Documentation/s390/s390dbf.txt for more details! 173 */ 174 extern debug_entry_t * 175 debug_sprintf_event(debug_info_t* id,int level,char *string,...) 176 __attribute__ ((format(printf, 3, 4))); 177 178 179 static inline debug_entry_t* 180 debug_exception(debug_info_t* id, int level, void* data, int length) 181 { 182 if ((!id) || (level > id->level) || (id->pages_per_area == 0)) 183 return NULL; 184 return debug_exception_common(id,level,data,length); 185 } 186 187 static inline debug_entry_t* 188 debug_int_exception(debug_info_t* id, int level, unsigned int tag) 189 { 190 unsigned int t=tag; 191 if ((!id) || (level > id->level) || (id->pages_per_area == 0)) 192 return NULL; 193 return debug_exception_common(id,level,&t,sizeof(unsigned int)); 194 } 195 196 static inline debug_entry_t * 197 debug_long_exception (debug_info_t* id, int level, unsigned long tag) 198 { 199 unsigned long t=tag; 200 if ((!id) || (level > id->level) || (id->pages_per_area == 0)) 201 return NULL; 202 return debug_exception_common(id,level,&t,sizeof(unsigned long)); 203 } 204 205 static inline debug_entry_t* 206 debug_text_exception(debug_info_t* id, int level, const char* txt) 207 { 208 if ((!id) || (level > id->level) || (id->pages_per_area == 0)) 209 return NULL; 210 return debug_exception_common(id,level,txt,strlen(txt)); 211 } 212 213 /* 214 * IMPORTANT: Use "%s" in sprintf format strings with care! Only pointers are 215 * stored in the s390dbf. See Documentation/s390/s390dbf.txt for more details! 216 */ 217 extern debug_entry_t * 218 debug_sprintf_exception(debug_info_t* id,int level,char *string,...) 219 __attribute__ ((format(printf, 3, 4))); 220 221 int debug_register_view(debug_info_t* id, struct debug_view* view); 222 int debug_unregister_view(debug_info_t* id, struct debug_view* view); 223 224 /* 225 define the debug levels: 226 - 0 No debugging output to console or syslog 227 - 1 Log internal errors to syslog, ignore check conditions 228 - 2 Log internal errors and check conditions to syslog 229 - 3 Log internal errors to console, log check conditions to syslog 230 - 4 Log internal errors and check conditions to console 231 - 5 panic on internal errors, log check conditions to console 232 - 6 panic on both, internal errors and check conditions 233 */ 234 235 #ifndef DEBUG_LEVEL 236 #define DEBUG_LEVEL 4 237 #endif 238 239 #define INTERNAL_ERRMSG(x,y...) "E" __FILE__ "%d: " x, __LINE__, y 240 #define INTERNAL_WRNMSG(x,y...) "W" __FILE__ "%d: " x, __LINE__, y 241 #define INTERNAL_INFMSG(x,y...) "I" __FILE__ "%d: " x, __LINE__, y 242 #define INTERNAL_DEBMSG(x,y...) "D" __FILE__ "%d: " x, __LINE__, y 243 244 #if DEBUG_LEVEL > 0 245 #define PRINT_DEBUG(x...) printk ( KERN_DEBUG PRINTK_HEADER x ) 246 #define PRINT_INFO(x...) printk ( KERN_INFO PRINTK_HEADER x ) 247 #define PRINT_WARN(x...) printk ( KERN_WARNING PRINTK_HEADER x ) 248 #define PRINT_ERR(x...) printk ( KERN_ERR PRINTK_HEADER x ) 249 #define PRINT_FATAL(x...) panic ( PRINTK_HEADER x ) 250 #else 251 #define PRINT_DEBUG(x...) printk ( KERN_DEBUG PRINTK_HEADER x ) 252 #define PRINT_INFO(x...) printk ( KERN_DEBUG PRINTK_HEADER x ) 253 #define PRINT_WARN(x...) printk ( KERN_DEBUG PRINTK_HEADER x ) 254 #define PRINT_ERR(x...) printk ( KERN_DEBUG PRINTK_HEADER x ) 255 #define PRINT_FATAL(x...) printk ( KERN_DEBUG PRINTK_HEADER x ) 256 #endif /* DASD_DEBUG */ 257 258 #endif /* __KERNEL__ */ 259 #endif /* DEBUG_H */ 260