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
  26 #ifdef CONFIG_HISAX_DEBUG
  27
  28 #define DBG(level, format, arg...) do {                                 \
  29                 if (level & __debug_variable)                           \
  30                         printk(KERN_DEBUG "%s: " format "\n" , __func__ , ## arg); \
  31         } while (0)
  32
  33 #define DBG_PACKET(level, data, count)                                  \
  34         if (level & __debug_variable) dump_packet(__func__, data, count)
  35
  36 #define DBG_SKB(level, skb)                                             \
  37         if ((level & __debug_variable) && skb) dump_packet(__func__, skb->data, skb->len)
  38
  39
  40 static void __attribute__((unused))
  41 dump_packet(const char *name, const u_char *data, int pkt_len)
  42 {
  43 #define DUMP_HDR_SIZE 20
  44 #define DUMP_TLR_SIZE 8
  45         if (pkt_len) {
  46                 int i, len1, len2;
  47
  48                 printk(KERN_DEBUG "%s: length=%d,data=", name, pkt_len);
  49
  50                 if (pkt_len > DUMP_HDR_SIZE + DUMP_TLR_SIZE) {
  51                         len1 = DUMP_HDR_SIZE;
  52                         len2 = DUMP_TLR_SIZE;
  53                 } else {
  54                         len1 = pkt_len > DUMP_HDR_SIZE ? DUMP_HDR_SIZE : pkt_len;
  55                         len2 = 0;
  56                 }
  57                 for (i = 0; i < len1; ++i) {
  58                         printk("%.2x", data[i]);
  59                 }
  60                 if (len2) {
  61                         printk("..");
  62                         for (i = pkt_len-DUMP_TLR_SIZE; i < pkt_len; ++i) {
  63                                 printk("%.2x", data[i]);
  64                         }
  65                 }
  66                 printk("\n");
  67         }
  68 #undef DUMP_HDR_SIZE
  69 #undef DUMP_TLR_SIZE
  70 }
  71
  72 #else
  73
  74 #define DBG(level, format, arg...) do {} while (0)
  75 #define DBG_PACKET(level, data, count) do {} while (0)
  76 #define DBG_SKB(level, skb) do {} while (0)
  77
  78 #endif
  79
  80 #endif