1249d6048SJerome Glisse /************************************************************************** 2249d6048SJerome Glisse * 3249d6048SJerome Glisse * Copyright 2006-2008 Tungsten Graphics, Inc., Cedar Park, TX. USA. 4249d6048SJerome Glisse * All Rights Reserved. 5249d6048SJerome Glisse * 6249d6048SJerome Glisse * Permission is hereby granted, free of charge, to any person obtaining a 7249d6048SJerome Glisse * copy of this software and associated documentation files (the 8249d6048SJerome Glisse * "Software"), to deal in the Software without restriction, including 9249d6048SJerome Glisse * without limitation the rights to use, copy, modify, merge, publish, 10249d6048SJerome Glisse * distribute, sub license, and/or sell copies of the Software, and to 11249d6048SJerome Glisse * permit persons to whom the Software is furnished to do so, subject to 12249d6048SJerome Glisse * the following conditions: 13249d6048SJerome Glisse * 14249d6048SJerome Glisse * The above copyright notice and this permission notice (including the 15249d6048SJerome Glisse * next paragraph) shall be included in all copies or substantial portions 16249d6048SJerome Glisse * of the Software. 17249d6048SJerome Glisse * 18249d6048SJerome Glisse * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19249d6048SJerome Glisse * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20249d6048SJerome Glisse * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 21249d6048SJerome Glisse * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 22249d6048SJerome Glisse * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 23249d6048SJerome Glisse * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 24249d6048SJerome Glisse * USE OR OTHER DEALINGS IN THE SOFTWARE. 25249d6048SJerome Glisse * 26249d6048SJerome Glisse * 27249d6048SJerome Glisse **************************************************************************/ 28249d6048SJerome Glisse /* 29249d6048SJerome Glisse * Authors: 30249d6048SJerome Glisse * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com> 31249d6048SJerome Glisse */ 32249d6048SJerome Glisse 33249d6048SJerome Glisse #ifndef _DRM_MM_H_ 34249d6048SJerome Glisse #define _DRM_MM_H_ 35249d6048SJerome Glisse 36249d6048SJerome Glisse /* 37249d6048SJerome Glisse * Generic range manager structs 38249d6048SJerome Glisse */ 39249d6048SJerome Glisse #include <linux/list.h> 40f1938cd6SDave Airlie #ifdef CONFIG_DEBUG_FS 41f1938cd6SDave Airlie #include <linux/seq_file.h> 42f1938cd6SDave Airlie #endif 43249d6048SJerome Glisse 44249d6048SJerome Glisse struct drm_mm_node { 45d1024ce9SDaniel Vetter struct list_head node_list; 46ea7b1dd4SDaniel Vetter struct list_head hole_stack; 47ea7b1dd4SDaniel Vetter unsigned hole_follows : 1; 48709ea971SDaniel Vetter unsigned scanned_block : 1; 49709ea971SDaniel Vetter unsigned scanned_prev_free : 1; 50709ea971SDaniel Vetter unsigned scanned_next_free : 1; 51ea7b1dd4SDaniel Vetter unsigned scanned_preceeds_hole : 1; 52b0b7af18SDaniel Vetter unsigned allocated : 1; 53249d6048SJerome Glisse unsigned long start; 54249d6048SJerome Glisse unsigned long size; 55249d6048SJerome Glisse struct drm_mm *mm; 56249d6048SJerome Glisse }; 57249d6048SJerome Glisse 58249d6048SJerome Glisse struct drm_mm { 59ea7b1dd4SDaniel Vetter /* List of all memory nodes that immediatly preceed a free hole. */ 60ea7b1dd4SDaniel Vetter struct list_head hole_stack; 61ea7b1dd4SDaniel Vetter /* head_node.node_list is the list of all memory nodes, ordered 62ea7b1dd4SDaniel Vetter * according to the (increasing) start address of the memory node. */ 63ea7b1dd4SDaniel Vetter struct drm_mm_node head_node; 64249d6048SJerome Glisse struct list_head unused_nodes; 65249d6048SJerome Glisse int num_unused; 66249d6048SJerome Glisse spinlock_t unused_lock; 67d935cc61SDaniel Vetter unsigned int scan_check_range : 1; 68709ea971SDaniel Vetter unsigned scan_alignment; 69709ea971SDaniel Vetter unsigned long scan_size; 70709ea971SDaniel Vetter unsigned long scan_hit_start; 71709ea971SDaniel Vetter unsigned scan_hit_size; 72709ea971SDaniel Vetter unsigned scanned_blocks; 73d935cc61SDaniel Vetter unsigned long scan_start; 74d935cc61SDaniel Vetter unsigned long scan_end; 75249d6048SJerome Glisse }; 76249d6048SJerome Glisse 77b0b7af18SDaniel Vetter static inline bool drm_mm_node_allocated(struct drm_mm_node *node) 78b0b7af18SDaniel Vetter { 79b0b7af18SDaniel Vetter return node->allocated; 80b0b7af18SDaniel Vetter } 81b0b7af18SDaniel Vetter 8231a5b8ceSDaniel Vetter static inline bool drm_mm_initialized(struct drm_mm *mm) 8331a5b8ceSDaniel Vetter { 84ea7b1dd4SDaniel Vetter return mm->hole_stack.next; 8531a5b8ceSDaniel Vetter } 86ea7b1dd4SDaniel Vetter #define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \ 87ea7b1dd4SDaniel Vetter &(mm)->head_node.node_list, \ 88ea7b1dd4SDaniel Vetter node_list); 89249d6048SJerome Glisse /* 90249d6048SJerome Glisse * Basic range manager support (drm_mm.c) 91249d6048SJerome Glisse */ 9289579f77SThomas Hellstrom extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node, 93249d6048SJerome Glisse unsigned long size, 9489579f77SThomas Hellstrom unsigned alignment, 9589579f77SThomas Hellstrom int atomic); 96a2e68e92SJerome Glisse extern struct drm_mm_node *drm_mm_get_block_range_generic( 97a2e68e92SJerome Glisse struct drm_mm_node *node, 98a2e68e92SJerome Glisse unsigned long size, 99a2e68e92SJerome Glisse unsigned alignment, 100a2e68e92SJerome Glisse unsigned long start, 101a2e68e92SJerome Glisse unsigned long end, 102a2e68e92SJerome Glisse int atomic); 10389579f77SThomas Hellstrom static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent, 104249d6048SJerome Glisse unsigned long size, 10589579f77SThomas Hellstrom unsigned alignment) 10689579f77SThomas Hellstrom { 10789579f77SThomas Hellstrom return drm_mm_get_block_generic(parent, size, alignment, 0); 10889579f77SThomas Hellstrom } 10989579f77SThomas Hellstrom static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent, 11089579f77SThomas Hellstrom unsigned long size, 11189579f77SThomas Hellstrom unsigned alignment) 11289579f77SThomas Hellstrom { 11389579f77SThomas Hellstrom return drm_mm_get_block_generic(parent, size, alignment, 1); 11489579f77SThomas Hellstrom } 115a2e68e92SJerome Glisse static inline struct drm_mm_node *drm_mm_get_block_range( 116a2e68e92SJerome Glisse struct drm_mm_node *parent, 117a2e68e92SJerome Glisse unsigned long size, 118a2e68e92SJerome Glisse unsigned alignment, 119a2e68e92SJerome Glisse unsigned long start, 120a2e68e92SJerome Glisse unsigned long end) 121a2e68e92SJerome Glisse { 122a2e68e92SJerome Glisse return drm_mm_get_block_range_generic(parent, size, alignment, 123a2e68e92SJerome Glisse start, end, 0); 124a2e68e92SJerome Glisse } 125a2e68e92SJerome Glisse static inline struct drm_mm_node *drm_mm_get_block_atomic_range( 126a2e68e92SJerome Glisse struct drm_mm_node *parent, 127a2e68e92SJerome Glisse unsigned long size, 128a2e68e92SJerome Glisse unsigned alignment, 129a2e68e92SJerome Glisse unsigned long start, 130a2e68e92SJerome Glisse unsigned long end) 131a2e68e92SJerome Glisse { 132a2e68e92SJerome Glisse return drm_mm_get_block_range_generic(parent, size, alignment, 133a2e68e92SJerome Glisse start, end, 1); 134a2e68e92SJerome Glisse } 135b0b7af18SDaniel Vetter extern int drm_mm_insert_node(struct drm_mm *mm, struct drm_mm_node *node, 136b0b7af18SDaniel Vetter unsigned long size, unsigned alignment); 137b0b7af18SDaniel Vetter extern int drm_mm_insert_node_in_range(struct drm_mm *mm, 138b0b7af18SDaniel Vetter struct drm_mm_node *node, 139b0b7af18SDaniel Vetter unsigned long size, unsigned alignment, 140b0b7af18SDaniel Vetter unsigned long start, unsigned long end); 141249d6048SJerome Glisse extern void drm_mm_put_block(struct drm_mm_node *cur); 142b0b7af18SDaniel Vetter extern void drm_mm_remove_node(struct drm_mm_node *node); 143b0b7af18SDaniel Vetter extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new); 144249d6048SJerome Glisse extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm, 145249d6048SJerome Glisse unsigned long size, 146249d6048SJerome Glisse unsigned alignment, 147249d6048SJerome Glisse int best_match); 148a2e68e92SJerome Glisse extern struct drm_mm_node *drm_mm_search_free_in_range( 149a2e68e92SJerome Glisse const struct drm_mm *mm, 150a2e68e92SJerome Glisse unsigned long size, 151a2e68e92SJerome Glisse unsigned alignment, 152a2e68e92SJerome Glisse unsigned long start, 153a2e68e92SJerome Glisse unsigned long end, 154a2e68e92SJerome Glisse int best_match); 155249d6048SJerome Glisse extern int drm_mm_init(struct drm_mm *mm, unsigned long start, 156249d6048SJerome Glisse unsigned long size); 157249d6048SJerome Glisse extern void drm_mm_takedown(struct drm_mm *mm); 158249d6048SJerome Glisse extern int drm_mm_clean(struct drm_mm *mm); 159249d6048SJerome Glisse extern int drm_mm_pre_get(struct drm_mm *mm); 160249d6048SJerome Glisse 161249d6048SJerome Glisse static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block) 162249d6048SJerome Glisse { 163249d6048SJerome Glisse return block->mm; 164249d6048SJerome Glisse } 165249d6048SJerome Glisse 166709ea971SDaniel Vetter void drm_mm_init_scan(struct drm_mm *mm, unsigned long size, 167709ea971SDaniel Vetter unsigned alignment); 168d935cc61SDaniel Vetter void drm_mm_init_scan_with_range(struct drm_mm *mm, unsigned long size, 169d935cc61SDaniel Vetter unsigned alignment, 170d935cc61SDaniel Vetter unsigned long start, 171d935cc61SDaniel Vetter unsigned long end); 172709ea971SDaniel Vetter int drm_mm_scan_add_block(struct drm_mm_node *node); 173709ea971SDaniel Vetter int drm_mm_scan_remove_block(struct drm_mm_node *node); 174709ea971SDaniel Vetter 17599d7e48eSJerome Glisse extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix); 176fa8a1238SDave Airlie #ifdef CONFIG_DEBUG_FS 177fa8a1238SDave Airlie int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm); 178fa8a1238SDave Airlie #endif 179fa8a1238SDave Airlie 180249d6048SJerome Glisse #endif 181