drivers/isdn/hisax/hisax_debug.h

   1 /*
   2  * Common debugging macros for use with the hisax driver
   3  *
   4  * Author       Frode Isaksen
   5  * Copyright    2001 by Frode Isaksen      <fisaksen@bewan.com>
   6  *              2001 by Kai Germaschewski  <kai.germaschewski@gmx.de>
   7  *
   8  * This software may be used and distributed according to the terms
   9  * of the GNU General Public License, incorporated herein by reference.
  10  *
  11  * How to use:
  12  *
  13  * Before including this file, you need to
  14  *   #define __debug_variable my_debug
  15  * where my_debug is a variable in your code which
  16  * determines the debug bitmask.
  17  *
  18  * If CONFIG_HISAX_DEBUG is not set, all macros evaluate to nothing
  19  *
  20  */
  21
  22 #ifndef __HISAX_DEBUG_H__
  23 #define __HISAX_DEBUG_H__
  24
  25 #include <linux/config.h>
  26
  27 #ifdef CONFIG_HISAX_DEBUG
  28
  29 #define DBG(level, format, arg...) do { \
  30 if (level & __debug_variable) \
  31 printk(KERN_DEBUG "%s: " format "\n" , __FUNCTION__ , ## arg); \
  32 } while (0)
  33
  34 #define DBG_PACKET(level,data,count) \
  35   if (level & __debug_variable) dump_packet(__FUNCTION__,data,count)
  36
  37 #define DBG_SKB(level,skb) \
  38   if ((level & __debug_variable) && skb) dump_packet(__FUNCTION__,skb->data,skb->len)
  39
  40
  41 static void __attribute__((unused))
  42 dump_packet(const char *name,const u_char *data,int pkt_len)
  43 {
  44 #define DUMP_HDR_SIZE 20
  45 #define DUMP_TLR_SIZE 8
  46         if (pkt_len) {
  47                 int i,len1,len2;
  48
  49                 printk(KERN_DEBUG "%s: length=%d,data=",name,pkt_len);
  50
  51                 if (pkt_len >  DUMP_HDR_SIZE+ DUMP_TLR_SIZE) {
  52                         len1 = DUMP_HDR_SIZE;
  53                         len2 = DUMP_TLR_SIZE;
  54                 } else {
  55                         len1 = pkt_len > DUMP_HDR_SIZE ? DUMP_HDR_SIZE : pkt_len;
  56                         len2 = 0;
  57                 }
  58                 for (i = 0; i < len1; ++i) {
  59                         printk ("%.2x", data[i]);
  60                 }
  61                 if (len2) {
  62                         printk ("..");
  63                         for (i = pkt_len-DUMP_TLR_SIZE; i < pkt_len; ++i) {
  64                                 printk ("%.2x", data[i]);
  65                         }
  66                 }
  67                 printk ("\n");
  68         }
  69 #undef DUMP_HDR_SIZE
  70 #undef DUMP_TLR_SIZE
  71 }
  72
  73 #else
  74
  75 #define DBG(level, format, arg...) do {} while (0)
  76 #define DBG_PACKET(level,data,count) do {} while (0)
  77 #define DBG_SKB(level,skb) do {} while (0)
  78
  79 #endif
  80
  81 #endif