LXR linux/drivers/isdn/hisax/hisax

   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
  40static void __attribute__((unused))
  41dump_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
  81