drivers/gpu/drm/nouveau/nouveau_ramht.h

   1 /*
   2  * Copyright 2010 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
  25 #ifndef __NOUVEAU_RAMHT_H__
  26 #define __NOUVEAU_RAMHT_H__
  27
  28 struct nouveau_ramht_entry {
  29         struct list_head head;
  30         struct nouveau_channel *channel;
  31         struct nouveau_gpuobj *gpuobj;
  32         u32 handle;
  33 };
  34
  35 struct nouveau_ramht {
  36         struct drm_device *dev;
  37         struct kref refcount;
  38         spinlock_t lock;
  39         struct nouveau_gpuobj *gpuobj;
  40         struct list_head entries;
  41         int bits;
  42 };
  43
  44 extern int  nouveau_ramht_new(struct drm_device *, struct nouveau_gpuobj *,
  45                               struct nouveau_ramht **);
  46 extern void nouveau_ramht_ref(struct nouveau_ramht *, struct nouveau_ramht **,
  47                               struct nouveau_channel *unref_channel);
  48
  49 extern int  nouveau_ramht_insert(struct nouveau_channel *, u32 handle,
  50                                  struct nouveau_gpuobj *);
  51 extern int  nouveau_ramht_remove(struct nouveau_channel *, u32 handle);
  52 extern struct nouveau_gpuobj *
  53 nouveau_ramht_find(struct nouveau_channel *chan, u32 handle);
  54
  55 #endif