include/asm-s390/debug.h

   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/config.h>
  13 #include <linux/fs.h>
  14 #include <linux/string.h>
  15
  16 /* Note:
  17  * struct __debug_entry must be defined outside of #ifdef __KERNEL__
  18  * in order to allow a user program to analyze the 'raw'-view.
  19  */
  20
  21 struct __debug_entry{
  22         union {
  23                 struct {
  24                         unsigned long long clock:52;
  25                         unsigned long long exception:1;
  26                         unsigned long long level:3;
  27                         unsigned long long cpuid:8;
  28                 } fields;
  29
  30                 unsigned long long stck;
  31         } id;
  32         void* caller;
  33 } __attribute__((packed));
  34
  35
  36 #define __DEBUG_FEATURE_VERSION      2  /* version of debug feature */
  37
  38 #ifdef __KERNEL__
  39 #include <linux/spinlock.h>
  40 #include <linux/kernel.h>
  41 #include <linux/time.h>
  42
  43 #define DEBUG_MAX_LEVEL            6  /* debug levels range from 0 to 6 */
  44 #define DEBUG_OFF_LEVEL            -1 /* level where debug is switched off */
  45 #define DEBUG_FLUSH_ALL            -1 /* parameter to flush all areas */
  46 #define DEBUG_MAX_VIEWS            10 /* max number of views in proc fs */
  47 #define DEBUG_MAX_NAME_LEN         64 /* max length for a debugfs file name */
  48 #define DEBUG_DEFAULT_LEVEL        3  /* initial debug level */
  49
  50 #define DEBUG_DIR_ROOT "s390dbf" /* name of debug root directory in proc fs */
  51
  52 #define DEBUG_DATA(entry) (char*)(entry + 1) /* data is stored behind */
  53                                              /* the entry information */
  54
  55 typedef struct __debug_entry debug_entry_t;
  56
  57 struct debug_view;
  58
  59 typedef struct debug_info {
  60         struct debug_info* next;
  61         struct debug_info* prev;
  62         atomic_t ref_count;
  63         spinlock_t lock;
  64         int level;
  65         int nr_areas;
  66         int pages_per_area;
  67         int buf_size;
  68         int entry_size;
  69         debug_entry_t*** areas;
  70         int active_area;
  71         int *active_pages;
  72         int *active_entries;
  73         struct dentry* debugfs_root_entry;
  74         struct dentry* debugfs_entries[DEBUG_MAX_VIEWS];
  75         struct debug_view* views[DEBUG_MAX_VIEWS];
  76         char name[DEBUG_MAX_NAME_LEN];
  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(char* name, int pages, int nr_areas,
 124                              int buf_size);
 125
 126 void debug_unregister(debug_info_t* id);
 127
 128 void debug_set_level(debug_info_t* id, int new_level);
 129
 130 void debug_stop_all(void);
 131
 132 static inline debug_entry_t*
 133 debug_event(debug_info_t* id, int level, void* data, int length)
 134 {
 135         if ((!id) || (level > id->level) || (id->pages_per_area == 0))
 136                 return NULL;
 137         return debug_event_common(id,level,data,length);
 138 }
 139
 140 static inline debug_entry_t*
 141 debug_int_event(debug_info_t* id, int level, unsigned int tag)
 142 {
 143         unsigned int t=tag;
 144         if ((!id) || (level > id->level) || (id->pages_per_area == 0))
 145                 return NULL;
 146         return debug_event_common(id,level,&t,sizeof(unsigned int));
 147 }
 148
 149 static inline debug_entry_t *
 150 debug_long_event (debug_info_t* id, int level, unsigned long tag)
 151 {
 152         unsigned long t=tag;
 153         if ((!id) || (level > id->level) || (id->pages_per_area == 0))
 154                 return NULL;
 155         return debug_event_common(id,level,&t,sizeof(unsigned long));
 156 }
 157
 158 static inline debug_entry_t*
 159 debug_text_event(debug_info_t* id, int level, const char* txt)
 160 {
 161         if ((!id) || (level > id->level) || (id->pages_per_area == 0))
 162                 return NULL;
 163         return debug_event_common(id,level,txt,strlen(txt));
 164 }
 165
 166 extern debug_entry_t *
 167 debug_sprintf_event(debug_info_t* id,int level,char *string,...)
 168         __attribute__ ((format(printf, 3, 4)));
 169
 170
 171 static inline debug_entry_t*
 172 debug_exception(debug_info_t* id, int level, void* data, int length)
 173 {
 174         if ((!id) || (level > id->level) || (id->pages_per_area == 0))
 175                 return NULL;
 176         return debug_exception_common(id,level,data,length);
 177 }
 178
 179 static inline debug_entry_t*
 180 debug_int_exception(debug_info_t* id, int level, unsigned int tag)
 181 {
 182         unsigned int t=tag;
 183         if ((!id) || (level > id->level) || (id->pages_per_area == 0))
 184                 return NULL;
 185         return debug_exception_common(id,level,&t,sizeof(unsigned int));
 186 }
 187
 188 static inline debug_entry_t *
 189 debug_long_exception (debug_info_t* id, int level, unsigned long tag)
 190 {
 191         unsigned long t=tag;
 192         if ((!id) || (level > id->level) || (id->pages_per_area == 0))
 193                 return NULL;
 194         return debug_exception_common(id,level,&t,sizeof(unsigned long));
 195 }
 196
 197 static inline debug_entry_t*
 198 debug_text_exception(debug_info_t* id, int level, const char* txt)
 199 {
 200         if ((!id) || (level > id->level) || (id->pages_per_area == 0))
 201                 return NULL;
 202         return debug_exception_common(id,level,txt,strlen(txt));
 203 }
 204
 205
 206 extern debug_entry_t *
 207 debug_sprintf_exception(debug_info_t* id,int level,char *string,...)
 208         __attribute__ ((format(printf, 3, 4)));
 209
 210 int debug_register_view(debug_info_t* id, struct debug_view* view);
 211 int debug_unregister_view(debug_info_t* id, struct debug_view* view);
 212
 213 /*
 214    define the debug levels:
 215    - 0 No debugging output to console or syslog
 216    - 1 Log internal errors to syslog, ignore check conditions
 217    - 2 Log internal errors and check conditions to syslog
 218    - 3 Log internal errors to console, log check conditions to syslog
 219    - 4 Log internal errors and check conditions to console
 220    - 5 panic on internal errors, log check conditions to console
 221    - 6 panic on both, internal errors and check conditions
 222  */
 223
 224 #ifndef DEBUG_LEVEL
 225 #define DEBUG_LEVEL 4
 226 #endif
 227
 228 #define INTERNAL_ERRMSG(x,y...) "E" __FILE__ "%d: " x, __LINE__, y
 229 #define INTERNAL_WRNMSG(x,y...) "W" __FILE__ "%d: " x, __LINE__, y
 230 #define INTERNAL_INFMSG(x,y...) "I" __FILE__ "%d: " x, __LINE__, y
 231 #define INTERNAL_DEBMSG(x,y...) "D" __FILE__ "%d: " x, __LINE__, y
 232
 233 #if DEBUG_LEVEL > 0
 234 #define PRINT_DEBUG(x...) printk ( KERN_DEBUG PRINTK_HEADER x )
 235 #define PRINT_INFO(x...) printk ( KERN_INFO PRINTK_HEADER x )
 236 #define PRINT_WARN(x...) printk ( KERN_WARNING PRINTK_HEADER x )
 237 #define PRINT_ERR(x...) printk ( KERN_ERR PRINTK_HEADER x )
 238 #define PRINT_FATAL(x...) panic ( PRINTK_HEADER x )
 239 #else
 240 #define PRINT_DEBUG(x...) printk ( KERN_DEBUG PRINTK_HEADER x )
 241 #define PRINT_INFO(x...) printk ( KERN_DEBUG PRINTK_HEADER x )
 242 #define PRINT_WARN(x...) printk ( KERN_DEBUG PRINTK_HEADER x )
 243 #define PRINT_ERR(x...) printk ( KERN_DEBUG PRINTK_HEADER x )
 244 #define PRINT_FATAL(x...) printk ( KERN_DEBUG PRINTK_HEADER x )
 245 #endif                          /* DASD_DEBUG */
 246
 247 #undef DEBUG_MALLOC
 248 #ifdef DEBUG_MALLOC
 249 void *b;
 250 #define kmalloc(x...) (PRINT_INFO(" kmalloc %p\n",b=kmalloc(x)),b)
 251 #define kfree(x) PRINT_INFO(" kfree %p\n",x);kfree(x)
 252 #define get_zeroed_page(x...) (PRINT_INFO(" gfp %p\n",b=get_zeroed_page(x)),b)
 253 #define __get_free_pages(x...) (PRINT_INFO(" gfps %p\n",b=__get_free_pages(x)),b)
 254 #endif                          /* DEBUG_MALLOC */
 255
 256 #endif                          /* __KERNEL__ */
 257 #endif                          /* DEBUG_H */