203 lines
6.4 KiB
C
203 lines
6.4 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/bug.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/spinlock.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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enum drm_mm_search_flags {
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DRM_MM_SEARCH_DEFAULT = 0,
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DRM_MM_SEARCH_BEST = 1 << 0,
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};
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struct drm_mm_node {
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struct list_head node_list;
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struct list_head hole_stack;
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unsigned hole_follows : 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 scanned_preceeds_hole : 1;
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unsigned allocated : 1;
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unsigned long color;
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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 all memory nodes that immediately precede a free hole. */
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struct list_head hole_stack;
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/* head_node.node_list is the list of all memory nodes, ordered
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* according to the (increasing) start address of the memory node. */
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struct drm_mm_node head_node;
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unsigned int scan_check_range : 1;
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unsigned scan_alignment;
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unsigned long scan_color;
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unsigned long scan_size;
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unsigned long scan_hit_start;
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unsigned long scan_hit_end;
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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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struct drm_mm_node *prev_scanned_node;
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void (*color_adjust)(struct drm_mm_node *node, unsigned long color,
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unsigned long *start, unsigned long *end);
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};
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static inline bool drm_mm_node_allocated(struct drm_mm_node *node)
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{
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return node->allocated;
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}
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static inline bool drm_mm_initialized(struct drm_mm *mm)
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{
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return mm->hole_stack.next;
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}
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static inline unsigned long __drm_mm_hole_node_start(struct drm_mm_node *hole_node)
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{
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return hole_node->start + hole_node->size;
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}
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static inline unsigned long drm_mm_hole_node_start(struct drm_mm_node *hole_node)
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{
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BUG_ON(!hole_node->hole_follows);
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return __drm_mm_hole_node_start(hole_node);
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}
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static inline unsigned long __drm_mm_hole_node_end(struct drm_mm_node *hole_node)
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{
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return list_entry(hole_node->node_list.next,
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struct drm_mm_node, node_list)->start;
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}
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static inline unsigned long drm_mm_hole_node_end(struct drm_mm_node *hole_node)
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{
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return __drm_mm_hole_node_end(hole_node);
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}
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#define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \
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&(mm)->head_node.node_list, \
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node_list)
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/* Note that we need to unroll list_for_each_entry in order to inline
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* setting hole_start and hole_end on each iteration and keep the
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* macro sane.
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*/
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#define drm_mm_for_each_hole(entry, mm, hole_start, hole_end) \
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for (entry = list_entry((mm)->hole_stack.next, struct drm_mm_node, hole_stack); \
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&entry->hole_stack != &(mm)->hole_stack ? \
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hole_start = drm_mm_hole_node_start(entry), \
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hole_end = drm_mm_hole_node_end(entry), \
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1 : 0; \
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entry = list_entry(entry->hole_stack.next, struct drm_mm_node, hole_stack))
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/*
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* Basic range manager support (drm_mm.c)
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*/
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extern int drm_mm_reserve_node(struct drm_mm *mm, struct drm_mm_node *node);
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extern int drm_mm_insert_node_generic(struct drm_mm *mm,
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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 color,
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enum drm_mm_search_flags flags);
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static inline int drm_mm_insert_node(struct drm_mm *mm,
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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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enum drm_mm_search_flags flags)
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{
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return drm_mm_insert_node_generic(mm, node, size, alignment, 0, flags);
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}
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extern int drm_mm_insert_node_in_range_generic(struct drm_mm *mm,
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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 color,
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unsigned long start,
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unsigned long end,
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enum drm_mm_search_flags flags);
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static inline int drm_mm_insert_node_in_range(struct drm_mm *mm,
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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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enum drm_mm_search_flags flags)
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{
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return drm_mm_insert_node_in_range_generic(mm, node, size, alignment,
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0, start, end, flags);
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}
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extern void drm_mm_remove_node(struct drm_mm_node *node);
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extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new);
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extern void drm_mm_init(struct drm_mm *mm,
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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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void drm_mm_init_scan(struct drm_mm *mm,
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unsigned long size,
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unsigned alignment,
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unsigned long color);
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void drm_mm_init_scan_with_range(struct drm_mm *mm,
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unsigned long size,
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unsigned alignment,
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unsigned long color,
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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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