drivers/s390/net/ctcm_dbug.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *      Copyright IBM Corp. 2001, 2007
   4  *      Authors:        Peter Tiedemann (ptiedem@de.ibm.com)
   5  *
   6  */
   7
   8 #include <linux/stddef.h>
   9 #include <linux/string.h>
  10 #include <linux/kernel.h>
  11 #include <linux/errno.h>
  12 #include <linux/ctype.h>
  13 #include <linux/sysctl.h>
  14 #include <linux/module.h>
  15 #include <linux/init.h>
  16 #include <linux/fs.h>
  17 #include <linux/debugfs.h>
  18 #include "ctcm_dbug.h"
  19
  20 /*
  21  * Debug Facility Stuff
  22  */
  23
  24 struct ctcm_dbf_info ctcm_dbf[CTCM_DBF_INFOS] = {
  25         [CTCM_DBF_SETUP]     = {"ctc_setup", 8, 1, 64, CTC_DBF_INFO, NULL},
  26         [CTCM_DBF_ERROR]     = {"ctc_error", 8, 1, 64, CTC_DBF_ERROR, NULL},
  27         [CTCM_DBF_TRACE]     = {"ctc_trace", 8, 1, 64, CTC_DBF_ERROR, NULL},
  28         [CTCM_DBF_MPC_SETUP] = {"mpc_setup", 8, 1, 80, CTC_DBF_INFO, NULL},
  29         [CTCM_DBF_MPC_ERROR] = {"mpc_error", 8, 1, 80, CTC_DBF_ERROR, NULL},
  30         [CTCM_DBF_MPC_TRACE] = {"mpc_trace", 8, 1, 80, CTC_DBF_ERROR, NULL},
  31 };
  32
  33 void ctcm_unregister_dbf_views(void)
  34 {
  35         int x;
  36         for (x = 0; x < CTCM_DBF_INFOS; x++) {
  37                 debug_unregister(ctcm_dbf[x].id);
  38                 ctcm_dbf[x].id = NULL;
  39         }
  40 }
  41
  42 int ctcm_register_dbf_views(void)
  43 {
  44         int x;
  45         for (x = 0; x < CTCM_DBF_INFOS; x++) {
  46                 /* register the areas */
  47                 ctcm_dbf[x].id = debug_register(ctcm_dbf[x].name,
  48                                                 ctcm_dbf[x].pages,
  49                                                 ctcm_dbf[x].areas,
  50                                                 ctcm_dbf[x].len);
  51                 if (ctcm_dbf[x].id == NULL) {
  52                         ctcm_unregister_dbf_views();
  53                         return -ENOMEM;
  54                 }
  55
  56                 /* register a view */
  57                 debug_register_view(ctcm_dbf[x].id, &debug_hex_ascii_view);
  58                 /* set a passing level */
  59                 debug_set_level(ctcm_dbf[x].id, ctcm_dbf[x].level);
  60         }
  61
  62         return 0;
  63 }
  64
  65 void ctcm_dbf_longtext(enum ctcm_dbf_names dbf_nix, int level, char *fmt, ...)
  66 {
  67         char dbf_txt_buf[64];
  68         va_list args;
  69
  70         if (!debug_level_enabled(ctcm_dbf[dbf_nix].id, level))
  71                 return;
  72         va_start(args, fmt);
  73         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
  74         va_end(args);
  75
  76         debug_text_event(ctcm_dbf[dbf_nix].id, level, dbf_txt_buf);
  77 }
  78