164 lines
5.2 KiB
C
164 lines
5.2 KiB
C
/**************************************************************************
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*
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* Copyright 2006-2008 Tungsten Graphics, Inc., Cedar Park, TX. 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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* Authors:
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* Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
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*/
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#ifndef _DRM_MM_H_
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#define _DRM_MM_H_
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/*
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* Generic range manager structs
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*/
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#include <linux/list.h>
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#ifdef CONFIG_DEBUG_FS
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#include <linux/seq_file.h>
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#endif
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struct drm_mm_node {
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struct list_head free_stack;
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struct list_head node_list;
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unsigned free : 1;
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unsigned scanned_block : 1;
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unsigned scanned_prev_free : 1;
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unsigned scanned_next_free : 1;
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unsigned long start;
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unsigned long size;
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struct drm_mm *mm;
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};
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struct drm_mm {
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/* List of free memory blocks, most recently freed ordered. */
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struct list_head free_stack;
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/* List of all memory nodes, ordered according to the (increasing) start
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* address of the memory node. */
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struct list_head node_list;
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struct list_head unused_nodes;
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int num_unused;
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spinlock_t unused_lock;
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unsigned int scan_check_range : 1;
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unsigned scan_alignment;
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unsigned long scan_size;
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unsigned long scan_hit_start;
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unsigned scan_hit_size;
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unsigned scanned_blocks;
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unsigned long scan_start;
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unsigned long scan_end;
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};
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/*
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* Basic range manager support (drm_mm.c)
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*/
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extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node,
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unsigned long size,
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unsigned alignment,
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int atomic);
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extern struct drm_mm_node *drm_mm_get_block_range_generic(
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struct drm_mm_node *node,
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unsigned long size,
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unsigned alignment,
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unsigned long start,
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unsigned long end,
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int atomic);
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static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent,
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unsigned long size,
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unsigned alignment)
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{
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return drm_mm_get_block_generic(parent, size, alignment, 0);
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}
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static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent,
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unsigned long size,
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unsigned alignment)
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{
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return drm_mm_get_block_generic(parent, size, alignment, 1);
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}
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static inline struct drm_mm_node *drm_mm_get_block_range(
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struct drm_mm_node *parent,
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unsigned long size,
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unsigned alignment,
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unsigned long start,
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unsigned long end)
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{
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return drm_mm_get_block_range_generic(parent, size, alignment,
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start, end, 0);
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}
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static inline struct drm_mm_node *drm_mm_get_block_atomic_range(
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struct drm_mm_node *parent,
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unsigned long size,
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unsigned alignment,
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unsigned long start,
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unsigned long end)
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{
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return drm_mm_get_block_range_generic(parent, size, alignment,
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start, end, 1);
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}
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extern void drm_mm_put_block(struct drm_mm_node *cur);
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extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
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unsigned long size,
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unsigned alignment,
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int best_match);
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extern struct drm_mm_node *drm_mm_search_free_in_range(
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const struct drm_mm *mm,
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unsigned long size,
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unsigned alignment,
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unsigned long start,
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unsigned long end,
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int best_match);
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extern int drm_mm_init(struct drm_mm *mm, unsigned long start,
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unsigned long size);
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extern void drm_mm_takedown(struct drm_mm *mm);
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extern int drm_mm_clean(struct drm_mm *mm);
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extern unsigned long drm_mm_tail_space(struct drm_mm *mm);
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extern int drm_mm_remove_space_from_tail(struct drm_mm *mm,
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unsigned long size);
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extern int drm_mm_add_space_to_tail(struct drm_mm *mm,
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unsigned long size, int atomic);
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extern int drm_mm_pre_get(struct drm_mm *mm);
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static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block)
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{
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return block->mm;
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}
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void drm_mm_init_scan(struct drm_mm *mm, unsigned long size,
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unsigned alignment);
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void drm_mm_init_scan_with_range(struct drm_mm *mm, unsigned long size,
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unsigned alignment,
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unsigned long start,
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unsigned long end);
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int drm_mm_scan_add_block(struct drm_mm_node *node);
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int drm_mm_scan_remove_block(struct drm_mm_node *node);
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extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix);
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#ifdef CONFIG_DEBUG_FS
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int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm);
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#endif
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#endif
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