aboutsummaryrefslogtreecommitdiff
path: root/sys/dev/drm/drm_hashtab.c
diff options
context:
space:
mode:
Diffstat (limited to 'sys/dev/drm/drm_hashtab.c')
-rw-r--r--sys/dev/drm/drm_hashtab.c181
1 files changed, 0 insertions, 181 deletions
diff --git a/sys/dev/drm/drm_hashtab.c b/sys/dev/drm/drm_hashtab.c
deleted file mode 100644
index 360c02bfada5..000000000000
--- a/sys/dev/drm/drm_hashtab.c
+++ /dev/null
@@ -1,181 +0,0 @@
-/**************************************************************************
- *
- * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND. USA.
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sub license, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice (including the
- * next paragraph) shall be included in all copies or substantial portions
- * of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
- * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
- * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
- * USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- *
- **************************************************************************/
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-/*
- * Simple open hash tab implementation.
- *
- * Authors:
- * Thomas Hellström <thomas-at-tungstengraphics-dot-com>
- */
-
-#include "dev/drm/drmP.h"
-#include "dev/drm/drm_hashtab.h"
-
-#include <sys/hash.h>
-
-int drm_ht_create(struct drm_open_hash *ht, unsigned int order)
-{
- ht->size = 1 << order;
- ht->order = order;
- ht->table = NULL;
- ht->table = hashinit_flags(ht->size, DRM_MEM_HASHTAB, &ht->mask,
- HASH_NOWAIT);
- if (!ht->table) {
- DRM_ERROR("Out of memory for hash table\n");
- return -ENOMEM;
- }
- return 0;
-}
-
-void drm_ht_verbose_list(struct drm_open_hash *ht, unsigned long key)
-{
- struct drm_hash_item *entry;
- struct drm_hash_item_list *h_list;
- unsigned int hashed_key;
- int count = 0;
-
- hashed_key = hash32_buf(&key, sizeof(key), ht->order);
- DRM_DEBUG("Key is 0x%08lx, Hashed key is 0x%08x\n", key, hashed_key);
- h_list = &ht->table[hashed_key & ht->mask];
- LIST_FOREACH(entry, h_list, head)
- DRM_DEBUG("count %d, key: 0x%08lx\n", count++, entry->key);
-}
-
-static struct drm_hash_item *
-drm_ht_find_key(struct drm_open_hash *ht, unsigned long key)
-{
- struct drm_hash_item *entry;
- struct drm_hash_item_list *h_list;
- unsigned int hashed_key;
-
- hashed_key = hash32_buf(&key, sizeof(key), ht->order);
- h_list = &ht->table[hashed_key & ht->mask];
- LIST_FOREACH(entry, h_list, head) {
- if (entry->key == key)
- return entry;
- if (entry->key > key)
- break;
- }
- return NULL;
-}
-
-
-int drm_ht_insert_item(struct drm_open_hash *ht, struct drm_hash_item *item)
-{
- struct drm_hash_item *entry, *parent;
- struct drm_hash_item_list *h_list;
- unsigned int hashed_key;
- unsigned long key = item->key;
-
- hashed_key = hash32_buf(&key, sizeof(key), ht->order);
- h_list = &ht->table[hashed_key & ht->mask];
- parent = NULL;
- LIST_FOREACH(entry, h_list, head) {
- if (entry->key == key)
- return -EINVAL;
- if (entry->key > key)
- break;
- parent = entry;
- }
- if (parent) {
- LIST_INSERT_AFTER(parent, item, head);
- } else {
- LIST_INSERT_HEAD(h_list, item, head);
- }
- return 0;
-}
-
-/*
- * Just insert an item and return any "bits" bit key that hasn't been
- * used before.
- */
-int drm_ht_just_insert_please(struct drm_open_hash *ht, struct drm_hash_item *item,
- unsigned long seed, int bits, int shift,
- unsigned long add)
-{
- int ret;
- unsigned long mask = (1 << bits) - 1;
- unsigned long first, unshifted_key = 0;
-
- unshifted_key = hash32_buf(&seed, sizeof(seed), unshifted_key);
- first = unshifted_key;
- do {
- item->key = (unshifted_key << shift) + add;
- ret = drm_ht_insert_item(ht, item);
- if (ret)
- unshifted_key = (unshifted_key + 1) & mask;
- } while(ret && (unshifted_key != first));
-
- if (ret) {
- DRM_ERROR("Available key bit space exhausted\n");
- return -EINVAL;
- }
- return 0;
-}
-
-int drm_ht_find_item(struct drm_open_hash *ht, unsigned long key,
- struct drm_hash_item **item)
-{
- struct drm_hash_item *entry;
-
- entry = drm_ht_find_key(ht, key);
- if (!entry)
- return -EINVAL;
-
- *item = entry;
- return 0;
-}
-
-int drm_ht_remove_key(struct drm_open_hash *ht, unsigned long key)
-{
- struct drm_hash_item *entry;
-
- entry = drm_ht_find_key(ht, key);
- if (entry) {
- LIST_REMOVE(entry, head);
- return 0;
- }
- return -EINVAL;
-}
-
-int drm_ht_remove_item(struct drm_open_hash *ht, struct drm_hash_item *item)
-{
- LIST_REMOVE(item, head);
- return 0;
-}
-
-void drm_ht_remove(struct drm_open_hash *ht)
-{
- if (ht->table) {
- hashdestroy(ht->table, DRM_MEM_HASHTAB, ht->mask);
- ht->table = NULL;
- }
-}