blob: 0af087a4d3b38e7ecaf8aeb05f3b3e1ee2d224f0 [file] [log] [blame]
Thomas Hellstrom3a1bd922006-08-07 21:30:28 +10001/**************************************************************************
2 *
3 * Copyright 2006 Tungsten Graphics, Inc., Bismack, ND. USA.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * 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, sub license, 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 portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 *
27 **************************************************************************/
28/*
29 * Simple open hash tab implementation.
30 *
31 * Authors:
Jan Engelhardt96de0e22007-10-19 23:21:04 +020032 * Thomas Hellström <thomas-at-tungstengraphics-dot-com>
Thomas Hellstrom3a1bd922006-08-07 21:30:28 +100033 */
34
35#ifndef DRM_HASHTAB_H
36#define DRM_HASHTAB_H
37
Jerome Glisse3c244752009-04-08 18:34:28 +020038#include <linux/list.h>
39
Thomas Hellstrom8d153f72006-08-07 22:36:47 +100040#define drm_hash_entry(_ptr, _type, _member) container_of(_ptr, _type, _member)
Thomas Hellstrom3a1bd922006-08-07 21:30:28 +100041
Dave Airliee0be4282007-07-12 10:26:44 +100042struct drm_hash_item {
Thomas Hellstrom3a1bd922006-08-07 21:30:28 +100043 struct hlist_node head;
44 unsigned long key;
Dave Airliee0be4282007-07-12 10:26:44 +100045};
Thomas Hellstrom3a1bd922006-08-07 21:30:28 +100046
Dave Airliee0be4282007-07-12 10:26:44 +100047struct drm_open_hash {
Thomas Hellstrom3a1bd922006-08-07 21:30:28 +100048 unsigned int size;
49 unsigned int order;
50 unsigned int fill;
51 struct hlist_head *table;
Dave Airliecd839d02007-02-18 17:14:09 +110052 int use_vmalloc;
Dave Airliee0be4282007-07-12 10:26:44 +100053};
Thomas Hellstrom3a1bd922006-08-07 21:30:28 +100054
55
Dave Airliee0be4282007-07-12 10:26:44 +100056extern int drm_ht_create(struct drm_open_hash *ht, unsigned int order);
57extern int drm_ht_insert_item(struct drm_open_hash *ht, struct drm_hash_item *item);
58extern int drm_ht_just_insert_please(struct drm_open_hash *ht, struct drm_hash_item *item,
Thomas Hellstrom3a1bd922006-08-07 21:30:28 +100059 unsigned long seed, int bits, int shift,
60 unsigned long add);
Dave Airliee0be4282007-07-12 10:26:44 +100061extern int drm_ht_find_item(struct drm_open_hash *ht, unsigned long key, struct drm_hash_item **item);
Thomas Hellstrom3a1bd922006-08-07 21:30:28 +100062
Dave Airliee0be4282007-07-12 10:26:44 +100063extern void drm_ht_verbose_list(struct drm_open_hash *ht, unsigned long key);
64extern int drm_ht_remove_key(struct drm_open_hash *ht, unsigned long key);
65extern int drm_ht_remove_item(struct drm_open_hash *ht, struct drm_hash_item *item);
66extern void drm_ht_remove(struct drm_open_hash *ht);
Thomas Hellstrom3a1bd922006-08-07 21:30:28 +100067
68
69#endif