| /************************************************************************** |
| * |
| * Copyright 2006-2008 Tungsten Graphics, Inc., Cedar Park, TX. 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. |
| * |
| * |
| **************************************************************************/ |
| /* |
| * Authors: |
| * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com> |
| */ |
| |
| #ifndef _DRM_MM_H_ |
| #define _DRM_MM_H_ |
| |
| /* |
| * Generic range manager structs |
| */ |
| #include <linux/list.h> |
| #ifdef CONFIG_DEBUG_FS |
| #include <linux/seq_file.h> |
| #endif |
| |
| struct drm_mm_node { |
| struct list_head node_list; |
| struct list_head hole_stack; |
| unsigned hole_follows : 1; |
| unsigned scanned_block : 1; |
| unsigned scanned_prev_free : 1; |
| unsigned scanned_next_free : 1; |
| unsigned scanned_preceeds_hole : 1; |
| unsigned allocated : 1; |
| unsigned long start; |
| unsigned long size; |
| struct drm_mm *mm; |
| }; |
| |
| struct drm_mm { |
| /* List of all memory nodes that immediately precede a free hole. */ |
| struct list_head hole_stack; |
| /* head_node.node_list is the list of all memory nodes, ordered |
| * according to the (increasing) start address of the memory node. */ |
| struct drm_mm_node head_node; |
| struct list_head unused_nodes; |
| int num_unused; |
| spinlock_t unused_lock; |
| unsigned int scan_check_range : 1; |
| unsigned scan_alignment; |
| unsigned long scan_size; |
| unsigned long scan_hit_start; |
| unsigned scan_hit_size; |
| unsigned scanned_blocks; |
| unsigned long scan_start; |
| unsigned long scan_end; |
| struct drm_mm_node *prev_scanned_node; |
| }; |
| |
| static inline bool drm_mm_node_allocated(struct drm_mm_node *node) |
| { |
| return node->allocated; |
| } |
| |
| static inline bool drm_mm_initialized(struct drm_mm *mm) |
| { |
| return mm->hole_stack.next; |
| } |
| #define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \ |
| &(mm)->head_node.node_list, \ |
| node_list); |
| #define drm_mm_for_each_scanned_node_reverse(entry, n, mm) \ |
| for (entry = (mm)->prev_scanned_node, \ |
| next = entry ? list_entry(entry->node_list.next, \ |
| struct drm_mm_node, node_list) : NULL; \ |
| entry != NULL; entry = next, \ |
| next = entry ? list_entry(entry->node_list.next, \ |
| struct drm_mm_node, node_list) : NULL) \ |
| /* |
| * Basic range manager support (drm_mm.c) |
| */ |
| extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node, |
| unsigned long size, |
| unsigned alignment, |
| int atomic); |
| extern struct drm_mm_node *drm_mm_get_block_range_generic( |
| struct drm_mm_node *node, |
| unsigned long size, |
| unsigned alignment, |
| unsigned long start, |
| unsigned long end, |
| int atomic); |
| static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent, |
| unsigned long size, |
| unsigned alignment) |
| { |
| return drm_mm_get_block_generic(parent, size, alignment, 0); |
| } |
| static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent, |
| unsigned long size, |
| unsigned alignment) |
| { |
| return drm_mm_get_block_generic(parent, size, alignment, 1); |
| } |
| static inline struct drm_mm_node *drm_mm_get_block_range( |
| struct drm_mm_node *parent, |
| unsigned long size, |
| unsigned alignment, |
| unsigned long start, |
| unsigned long end) |
| { |
| return drm_mm_get_block_range_generic(parent, size, alignment, |
| start, end, 0); |
| } |
| static inline struct drm_mm_node *drm_mm_get_block_atomic_range( |
| struct drm_mm_node *parent, |
| unsigned long size, |
| unsigned alignment, |
| unsigned long start, |
| unsigned long end) |
| { |
| return drm_mm_get_block_range_generic(parent, size, alignment, |
| start, end, 1); |
| } |
| extern int drm_mm_insert_node(struct drm_mm *mm, struct drm_mm_node *node, |
| unsigned long size, unsigned alignment); |
| extern int drm_mm_insert_node_in_range(struct drm_mm *mm, |
| struct drm_mm_node *node, |
| unsigned long size, unsigned alignment, |
| unsigned long start, unsigned long end); |
| extern void drm_mm_put_block(struct drm_mm_node *cur); |
| extern void drm_mm_remove_node(struct drm_mm_node *node); |
| extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new); |
| extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm, |
| unsigned long size, |
| unsigned alignment, |
| int best_match); |
| extern struct drm_mm_node *drm_mm_search_free_in_range( |
| const struct drm_mm *mm, |
| unsigned long size, |
| unsigned alignment, |
| unsigned long start, |
| unsigned long end, |
| int best_match); |
| extern int drm_mm_init(struct drm_mm *mm, unsigned long start, |
| unsigned long size); |
| extern void drm_mm_takedown(struct drm_mm *mm); |
| extern int drm_mm_clean(struct drm_mm *mm); |
| extern int drm_mm_pre_get(struct drm_mm *mm); |
| |
| static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block) |
| { |
| return block->mm; |
| } |
| |
| void drm_mm_init_scan(struct drm_mm *mm, unsigned long size, |
| unsigned alignment); |
| void drm_mm_init_scan_with_range(struct drm_mm *mm, unsigned long size, |
| unsigned alignment, |
| unsigned long start, |
| unsigned long end); |
| int drm_mm_scan_add_block(struct drm_mm_node *node); |
| int drm_mm_scan_remove_block(struct drm_mm_node *node); |
| |
| extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix); |
| #ifdef CONFIG_DEBUG_FS |
| int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm); |
| #endif |
| |
| #endif |