LXR linux/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
  27const char *
  28nvkm_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
  53bool
  54nvkm_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
  76long
  77nvkm_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
  94int
  95nvkm_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}
 140