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Diffstat (limited to 'drivers/char/drm/drm_hashtab.c')
-rw-r--r--drivers/char/drm/drm_hashtab.c202
1 files changed, 0 insertions, 202 deletions
diff --git a/drivers/char/drm/drm_hashtab.c b/drivers/char/drm/drm_hashtab.c
deleted file mode 100644
index 33160673a7b7..000000000000
--- a/drivers/char/drm/drm_hashtab.c
+++ /dev/null
@@ -1,202 +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.
- *
- *
- **************************************************************************/
-/*
- * Simple open hash tab implementation.
- *
- * Authors:
- * Thomas Hellström <thomas-at-tungstengraphics-dot-com>
- */
-
-#include "drmP.h"
-#include "drm_hashtab.h"
-#include <linux/hash.h>
-
-int drm_ht_create(struct drm_open_hash *ht, unsigned int order)
-{
- unsigned int i;
-
- ht->size = 1 << order;
- ht->order = order;
- ht->fill = 0;
- ht->table = NULL;
- ht->use_vmalloc = ((ht->size * sizeof(*ht->table)) > PAGE_SIZE);
- if (!ht->use_vmalloc) {
- ht->table = drm_calloc(ht->size, sizeof(*ht->table),
- DRM_MEM_HASHTAB);
- }
- if (!ht->table) {
- ht->use_vmalloc = 1;
- ht->table = vmalloc(ht->size*sizeof(*ht->table));
- }
- if (!ht->table) {
- DRM_ERROR("Out of memory for hash table\n");
- return -ENOMEM;
- }
- for (i=0; i< ht->size; ++i) {
- INIT_HLIST_HEAD(&ht->table[i]);
- }
- return 0;
-}
-
-void drm_ht_verbose_list(struct drm_open_hash *ht, unsigned long key)
-{
- struct drm_hash_item *entry;
- struct hlist_head *h_list;
- struct hlist_node *list;
- unsigned int hashed_key;
- int count = 0;
-
- hashed_key = hash_long(key, ht->order);
- DRM_DEBUG("Key is 0x%08lx, Hashed key is 0x%08x\n", key, hashed_key);
- h_list = &ht->table[hashed_key];
- hlist_for_each(list, h_list) {
- entry = hlist_entry(list, struct drm_hash_item, head);
- DRM_DEBUG("count %d, key: 0x%08lx\n", count++, entry->key);
- }
-}
-
-static struct hlist_node *drm_ht_find_key(struct drm_open_hash *ht,
- unsigned long key)
-{
- struct drm_hash_item *entry;
- struct hlist_head *h_list;
- struct hlist_node *list;
- unsigned int hashed_key;
-
- hashed_key = hash_long(key, ht->order);
- h_list = &ht->table[hashed_key];
- hlist_for_each(list, h_list) {
- entry = hlist_entry(list, struct drm_hash_item, head);
- if (entry->key == key)
- return list;
- 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;
- struct hlist_head *h_list;
- struct hlist_node *list, *parent;
- unsigned int hashed_key;
- unsigned long key = item->key;
-
- hashed_key = hash_long(key, ht->order);
- h_list = &ht->table[hashed_key];
- parent = NULL;
- hlist_for_each(list, h_list) {
- entry = hlist_entry(list, struct drm_hash_item, head);
- if (entry->key == key)
- return -EINVAL;
- if (entry->key > key)
- break;
- parent = list;
- }
- if (parent) {
- hlist_add_after(parent, &item->head);
- } else {
- hlist_add_head(&item->head, h_list);
- }
- 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;
-
- unshifted_key = hash_long(seed, bits);
- 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 hlist_node *list;
-
- list = drm_ht_find_key(ht, key);
- if (!list)
- return -EINVAL;
-
- *item = hlist_entry(list, struct drm_hash_item, head);
- return 0;
-}
-
-int drm_ht_remove_key(struct drm_open_hash *ht, unsigned long key)
-{
- struct hlist_node *list;
-
- list = drm_ht_find_key(ht, key);
- if (list) {
- hlist_del_init(list);
- ht->fill--;
- return 0;
- }
- return -EINVAL;
-}
-
-int drm_ht_remove_item(struct drm_open_hash *ht, struct drm_hash_item *item)
-{
- hlist_del_init(&item->head);
- ht->fill--;
- return 0;
-}
-
-void drm_ht_remove(struct drm_open_hash *ht)
-{
- if (ht->table) {
- if (ht->use_vmalloc)
- vfree(ht->table);
- else
- drm_free(ht->table, ht->size * sizeof(*ht->table),
- DRM_MEM_HASHTAB);
- ht->table = NULL;
- }
-}