8d153f7107
Keep hashed user tokens, with the following changes:
32-bit physical device addresses are mapped directly to user-tokens. No
duplicate maps are allowed, and the addresses are assumed to be outside
of the range 0x10000000 through 0x30000000. The user-token is identical
to the 32-bit physical start-address of the map.
64-bit physical device addressed are mapped to user-tokens in the range
0x10000000 to 0x30000000 with page-size increments. The user_token should
not be interpreted as an address.
Other map types, like upcoming TTM maps are mapped to user-tokens in the
range
0x10000000 to 0x30000000 with page-size increments. The user_token should
not be interpreted as an address.
Implement hashed map lookups.
Signed-off-by: Dave Airlie <airlied@linux.ie>
67 lines
2.5 KiB
C
67 lines
2.5 KiB
C
/**************************************************************************
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*
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* Copyright 2006 Tungsten Graphics, Inc., Bismack, ND. USA.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*
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**************************************************************************/
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/*
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* Simple open hash tab implementation.
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*
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* Authors:
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* Thomas Hellström <thomas-at-tungstengraphics-dot-com>
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*/
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#ifndef DRM_HASHTAB_H
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#define DRM_HASHTAB_H
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#define drm_hash_entry(_ptr, _type, _member) container_of(_ptr, _type, _member)
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typedef struct drm_hash_item{
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struct hlist_node head;
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unsigned long key;
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} drm_hash_item_t;
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typedef struct drm_open_hash{
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unsigned int size;
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unsigned int order;
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unsigned int fill;
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struct hlist_head *table;
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} drm_open_hash_t;
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extern int drm_ht_create(drm_open_hash_t *ht, unsigned int order);
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extern int drm_ht_insert_item(drm_open_hash_t *ht, drm_hash_item_t *item);
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extern int drm_ht_just_insert_please(drm_open_hash_t *ht, drm_hash_item_t *item,
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unsigned long seed, int bits, int shift,
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unsigned long add);
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extern int drm_ht_find_item(drm_open_hash_t *ht, unsigned long key, drm_hash_item_t **item);
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extern void drm_ht_verbose_list(drm_open_hash_t *ht, unsigned long key);
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extern int drm_ht_remove_key(drm_open_hash_t *ht, unsigned long key);
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extern int drm_ht_remove_item(drm_open_hash_t *ht, drm_hash_item_t *item);
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extern void drm_ht_remove(drm_open_hash_t *ht);
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#endif
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