drivers/gpu/drm/nouveau/nouveau_util.c

   1 /*
   2  * Copyright (C) 2010 Nouveau Project
   3  *
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining
   7  * a copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sublicense, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial
  16  * portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  */
  27
  28 #include <linux/ratelimit.h>
  29
  30 #include "nouveau_util.h"
  31
  32 static DEFINE_RATELIMIT_STATE(nouveau_ratelimit_state, 3 * HZ, 20);
  33
  34 void
  35 nouveau_bitfield_print(const struct nouveau_bitfield *bf, u32 value)
  36 {
  37         while (bf->name) {
  38                 if (value & bf->mask) {
  39                         printk(" %s", bf->name);
  40                         value &= ~bf->mask;
  41                 }
  42
  43                 bf++;
  44         }
  45
  46         if (value)
  47                 printk(" (unknown bits 0x%08x)", value);
  48 }
  49
  50 const struct nouveau_enum *
  51 nouveau_enum_find(const struct nouveau_enum *en, u32 value)
  52 {
  53         while (en->name) {
  54                 if (en->value == value)
  55                         return en;
  56                 en++;
  57         }
  58
  59         return NULL;
  60 }
  61
  62 void
  63 nouveau_enum_print(const struct nouveau_enum *en, u32 value)
  64 {
  65         en = nouveau_enum_find(en, value);
  66         if (en) {
  67                 printk("%s", en->name);
  68                 return;
  69         }
  70
  71         printk("(unknown enum 0x%08x)", value);
  72 }
  73
  74 int
  75 nouveau_ratelimit(void)
  76 {
  77         return __ratelimit(&nouveau_ratelimit_state);
  78 }