kernel/drivers/gpu/drm/nouveau/nvkm/core/option.c

   1 /*
   2  * Copyright 2012 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Ben Skeggs
  23  */
  24 #include <core/option.h>
  25 #include <core/debug.h>
  26
  27 const char *
  28 nvkm_stropt(const char *optstr, const char *opt, int *arglen)
  29 {
  30         while (optstr && *optstr != '\0') {
  31                 int len = strcspn(optstr, ",=");
  32                 switch (optstr[len]) {
  33                 case '=':
  34                         if (!strncasecmpz(optstr, opt, len)) {
  35                                 optstr += len + 1;
  36                                 *arglen = strcspn(optstr, ",=");
  37                                 return *arglen ? optstr : NULL;
  38                         }
  39                         optstr++;
  40                         break;
  41                 case ',':
  42                         optstr++;
  43                         break;
  44                 default:
  45                         break;
  46                 }
  47                 optstr += len;
  48         }
  49
  50         return NULL;
  51 }
  52
  53 bool
  54 nvkm_boolopt(const char *optstr, const char *opt, bool value)
  55 {
  56         int arglen;
  57
  58         optstr = nvkm_stropt(optstr, opt, &arglen);
  59         if (optstr) {
  60                 if (!strncasecmpz(optstr, "0", arglen) ||
  61                     !strncasecmpz(optstr, "no", arglen) ||
  62                     !strncasecmpz(optstr, "off", arglen) ||
  63                     !strncasecmpz(optstr, "false", arglen))
  64                         value = false;
  65                 else
  66                 if (!strncasecmpz(optstr, "1", arglen) ||
  67                     !strncasecmpz(optstr, "yes", arglen) ||
  68                     !strncasecmpz(optstr, "on", arglen) ||
  69                     !strncasecmpz(optstr, "true", arglen))
  70                         value = true;
  71         }
  72
  73         return value;
  74 }
  75
  76 long
  77 nvkm_longopt(const char *optstr, const char *opt, long value)
  78 {
  79         long result = value;
  80         int arglen;
  81         char *s;
  82
  83         optstr = nvkm_stropt(optstr, opt, &arglen);
  84         if (optstr && (s = kstrndup(optstr, arglen, GFP_KERNEL))) {
  85                 int ret = kstrtol(s, 0, &value);
  86                 if (ret == 0)
  87                         result = value;
  88                 kfree(s);
  89         }
  90
  91         return result;
  92 }
  93
  94 int
  95 nvkm_dbgopt(const char *optstr, const char *sub)
  96 {
  97         int mode = 1, level = CONFIG_NOUVEAU_DEBUG_DEFAULT;
  98
  99         while (optstr) {
 100                 int len = strcspn(optstr, ",=");
 101                 switch (optstr[len]) {
 102                 case '=':
 103                         if (strncasecmpz(optstr, sub, len))
 104                                 mode = 0;
 105                         optstr++;
 106                         break;
 107                 default:
 108                         if (mode) {
 109                                 if (!strncasecmpz(optstr, "fatal", len))
 110                                         level = NV_DBG_FATAL;
 111                                 else if (!strncasecmpz(optstr, "error", len))
 112                                         level = NV_DBG_ERROR;
 113                                 else if (!strncasecmpz(optstr, "warn", len))
 114                                         level = NV_DBG_WARN;
 115                                 else if (!strncasecmpz(optstr, "info", len))
 116                                         level = NV_DBG_INFO;
 117                                 else if (!strncasecmpz(optstr, "debug", len))
 118                                         level = NV_DBG_DEBUG;
 119                                 else if (!strncasecmpz(optstr, "trace", len))
 120                                         level = NV_DBG_TRACE;
 121                                 else if (!strncasecmpz(optstr, "paranoia", len))
 122                                         level = NV_DBG_PARANOIA;
 123                                 else if (!strncasecmpz(optstr, "spam", len))
 124                                         level = NV_DBG_SPAM;
 125                         }
 126
 127                         if (optstr[len] != '\0') {
 128                                 optstr++;
 129                                 mode = 1;
 130                                 break;
 131                         }
 132
 133                         return level;
 134                 }
 135                 optstr += len;
 136         }
 137
 138         return level;
 139 }