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      1 /*	$NetBSD: nouveau_nvkm_core_option.c,v 1.5 2021/12/18 23:45:34 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2012 Red Hat Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  *
     24  * Authors: Ben Skeggs
     25  */
     26 #include <sys/cdefs.h>
     27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_core_option.c,v 1.5 2021/12/18 23:45:34 riastradh Exp $");
     28 
     29 #include <core/option.h>
     30 #include <core/debug.h>
     31 
     32 const char *
     33 nvkm_stropt(const char *optstr, const char *opt, int *arglen)
     34 {
     35 	while (optstr && *optstr != '\0') {
     36 		int len = strcspn(optstr, ",=");
     37 		switch (optstr[len]) {
     38 		case '=':
     39 			if (!strncasecmpz(optstr, opt, len)) {
     40 				optstr += len + 1;
     41 				*arglen = strcspn(optstr, ",=");
     42 				return *arglen ? optstr : NULL;
     43 			}
     44 			optstr++;
     45 			break;
     46 		case ',':
     47 			optstr++;
     48 			break;
     49 		default:
     50 			break;
     51 		}
     52 		optstr += len;
     53 	}
     54 
     55 	return NULL;
     56 }
     57 
     58 bool
     59 nvkm_boolopt(const char *optstr, const char *opt, bool value)
     60 {
     61 	int arglen;
     62 
     63 	optstr = nvkm_stropt(optstr, opt, &arglen);
     64 	if (optstr) {
     65 		if (!strncasecmpz(optstr, "0", arglen) ||
     66 		    !strncasecmpz(optstr, "no", arglen) ||
     67 		    !strncasecmpz(optstr, "off", arglen) ||
     68 		    !strncasecmpz(optstr, "false", arglen))
     69 			value = false;
     70 		else
     71 		if (!strncasecmpz(optstr, "1", arglen) ||
     72 		    !strncasecmpz(optstr, "yes", arglen) ||
     73 		    !strncasecmpz(optstr, "on", arglen) ||
     74 		    !strncasecmpz(optstr, "true", arglen))
     75 			value = true;
     76 	}
     77 
     78 	return value;
     79 }
     80 
     81 long
     82 nvkm_longopt(const char *optstr, const char *opt, long value)
     83 {
     84 	long result = value;
     85 	int arglen;
     86 	char *s;
     87 
     88 	optstr = nvkm_stropt(optstr, opt, &arglen);
     89 	if (optstr && (s = kstrndup(optstr, arglen, GFP_KERNEL))) {
     90 		int ret = kstrtol(s, 0, &value);
     91 		if (ret == 0)
     92 			result = value;
     93 		kfree(s);
     94 	}
     95 
     96 	return result;
     97 }
     98 
     99 int
    100 nvkm_dbgopt(const char *optstr, const char *sub)
    101 {
    102 	int mode = 1, level = CONFIG_NOUVEAU_DEBUG_DEFAULT;
    103 
    104 	while (optstr) {
    105 		int len = strcspn(optstr, ",=");
    106 		switch (optstr[len]) {
    107 		case '=':
    108 			if (strncasecmpz(optstr, sub, len))
    109 				mode = 0;
    110 			optstr++;
    111 			break;
    112 		default:
    113 			if (mode) {
    114 				if (!strncasecmpz(optstr, "fatal", len))
    115 					level = NV_DBG_FATAL;
    116 				else if (!strncasecmpz(optstr, "error", len))
    117 					level = NV_DBG_ERROR;
    118 				else if (!strncasecmpz(optstr, "warn", len))
    119 					level = NV_DBG_WARN;
    120 				else if (!strncasecmpz(optstr, "info", len))
    121 					level = NV_DBG_INFO;
    122 				else if (!strncasecmpz(optstr, "debug", len))
    123 					level = NV_DBG_DEBUG;
    124 				else if (!strncasecmpz(optstr, "trace", len))
    125 					level = NV_DBG_TRACE;
    126 				else if (!strncasecmpz(optstr, "paranoia", len))
    127 					level = NV_DBG_PARANOIA;
    128 				else if (!strncasecmpz(optstr, "spam", len))
    129 					level = NV_DBG_SPAM;
    130 			}
    131 
    132 			if (optstr[len] != '\0') {
    133 				optstr++;
    134 				mode = 1;
    135 				break;
    136 			}
    137 
    138 			return level;
    139 		}
    140 		optstr += len;
    141 	}
    142 
    143 	return level;
    144 }
    145