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; 52249d6048SJerome Glisse unsigned long start; 53249d6048SJerome Glisse unsigned long size; 54249d6048SJerome Glisse struct drm_mm *mm; 55249d6048SJerome Glisse }; 56249d6048SJerome Glisse 57249d6048SJerome Glisse struct drm_mm { 58ea7b1dd4SDaniel Vetter /* List of all memory nodes that immediatly preceed a free hole. */ 59ea7b1dd4SDaniel Vetter struct list_head hole_stack; 60ea7b1dd4SDaniel Vetter /* head_node.node_list is the list of all memory nodes, ordered 61ea7b1dd4SDaniel Vetter * according to the (increasing) start address of the memory node. */ 62ea7b1dd4SDaniel Vetter struct drm_mm_node head_node; 63249d6048SJerome Glisse struct list_head unused_nodes; 64249d6048SJerome Glisse int num_unused; 65249d6048SJerome Glisse spinlock_t unused_lock; 66d935cc61SDaniel Vetter unsigned int scan_check_range : 1; 67709ea971SDaniel Vetter unsigned scan_alignment; 68709ea971SDaniel Vetter unsigned long scan_size; 69709ea971SDaniel Vetter unsigned long scan_hit_start; 70709ea971SDaniel Vetter unsigned scan_hit_size; 71709ea971SDaniel Vetter unsigned scanned_blocks; 72d935cc61SDaniel Vetter unsigned long scan_start; 73d935cc61SDaniel Vetter unsigned long scan_end; 74249d6048SJerome Glisse }; 75249d6048SJerome Glisse 7631a5b8ceSDaniel Vetter static inline bool drm_mm_initialized(struct drm_mm *mm) 7731a5b8ceSDaniel Vetter { 78ea7b1dd4SDaniel Vetter return mm->hole_stack.next; 7931a5b8ceSDaniel Vetter } 80ea7b1dd4SDaniel Vetter #define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \ 81ea7b1dd4SDaniel Vetter &(mm)->head_node.node_list, \ 82ea7b1dd4SDaniel Vetter node_list); 83249d6048SJerome Glisse /* 84249d6048SJerome Glisse * Basic range manager support (drm_mm.c) 85249d6048SJerome Glisse */ 8689579f77SThomas Hellstrom extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node, 87249d6048SJerome Glisse unsigned long size, 8889579f77SThomas Hellstrom unsigned alignment, 8989579f77SThomas Hellstrom int atomic); 90a2e68e92SJerome Glisse extern struct drm_mm_node *drm_mm_get_block_range_generic( 91a2e68e92SJerome Glisse struct drm_mm_node *node, 92a2e68e92SJerome Glisse unsigned long size, 93a2e68e92SJerome Glisse unsigned alignment, 94a2e68e92SJerome Glisse unsigned long start, 95a2e68e92SJerome Glisse unsigned long end, 96a2e68e92SJerome Glisse int atomic); 9789579f77SThomas Hellstrom static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent, 98249d6048SJerome Glisse unsigned long size, 9989579f77SThomas Hellstrom unsigned alignment) 10089579f77SThomas Hellstrom { 10189579f77SThomas Hellstrom return drm_mm_get_block_generic(parent, size, alignment, 0); 10289579f77SThomas Hellstrom } 10389579f77SThomas Hellstrom static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent, 10489579f77SThomas Hellstrom unsigned long size, 10589579f77SThomas Hellstrom unsigned alignment) 10689579f77SThomas Hellstrom { 10789579f77SThomas Hellstrom return drm_mm_get_block_generic(parent, size, alignment, 1); 10889579f77SThomas Hellstrom } 109a2e68e92SJerome Glisse static inline struct drm_mm_node *drm_mm_get_block_range( 110a2e68e92SJerome Glisse struct drm_mm_node *parent, 111a2e68e92SJerome Glisse unsigned long size, 112a2e68e92SJerome Glisse unsigned alignment, 113a2e68e92SJerome Glisse unsigned long start, 114a2e68e92SJerome Glisse unsigned long end) 115a2e68e92SJerome Glisse { 116a2e68e92SJerome Glisse return drm_mm_get_block_range_generic(parent, size, alignment, 117a2e68e92SJerome Glisse start, end, 0); 118a2e68e92SJerome Glisse } 119a2e68e92SJerome Glisse static inline struct drm_mm_node *drm_mm_get_block_atomic_range( 120a2e68e92SJerome Glisse struct drm_mm_node *parent, 121a2e68e92SJerome Glisse unsigned long size, 122a2e68e92SJerome Glisse unsigned alignment, 123a2e68e92SJerome Glisse unsigned long start, 124a2e68e92SJerome Glisse unsigned long end) 125a2e68e92SJerome Glisse { 126a2e68e92SJerome Glisse return drm_mm_get_block_range_generic(parent, size, alignment, 127a2e68e92SJerome Glisse start, end, 1); 128a2e68e92SJerome Glisse } 129249d6048SJerome Glisse extern void drm_mm_put_block(struct drm_mm_node *cur); 130249d6048SJerome Glisse extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm, 131249d6048SJerome Glisse unsigned long size, 132249d6048SJerome Glisse unsigned alignment, 133249d6048SJerome Glisse int best_match); 134a2e68e92SJerome Glisse extern struct drm_mm_node *drm_mm_search_free_in_range( 135a2e68e92SJerome Glisse const struct drm_mm *mm, 136a2e68e92SJerome Glisse unsigned long size, 137a2e68e92SJerome Glisse unsigned alignment, 138a2e68e92SJerome Glisse unsigned long start, 139a2e68e92SJerome Glisse unsigned long end, 140a2e68e92SJerome Glisse int best_match); 141249d6048SJerome Glisse extern int drm_mm_init(struct drm_mm *mm, unsigned long start, 142249d6048SJerome Glisse unsigned long size); 143249d6048SJerome Glisse extern void drm_mm_takedown(struct drm_mm *mm); 144249d6048SJerome Glisse extern int drm_mm_clean(struct drm_mm *mm); 145249d6048SJerome Glisse extern unsigned long drm_mm_tail_space(struct drm_mm *mm); 146249d6048SJerome Glisse extern int drm_mm_remove_space_from_tail(struct drm_mm *mm, 147249d6048SJerome Glisse unsigned long size); 148249d6048SJerome Glisse extern int drm_mm_add_space_to_tail(struct drm_mm *mm, 149249d6048SJerome Glisse unsigned long size, int atomic); 150249d6048SJerome Glisse extern int drm_mm_pre_get(struct drm_mm *mm); 151249d6048SJerome Glisse 152249d6048SJerome Glisse static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block) 153249d6048SJerome Glisse { 154249d6048SJerome Glisse return block->mm; 155249d6048SJerome Glisse } 156249d6048SJerome Glisse 157709ea971SDaniel Vetter void drm_mm_init_scan(struct drm_mm *mm, unsigned long size, 158709ea971SDaniel Vetter unsigned alignment); 159d935cc61SDaniel Vetter void drm_mm_init_scan_with_range(struct drm_mm *mm, unsigned long size, 160d935cc61SDaniel Vetter unsigned alignment, 161d935cc61SDaniel Vetter unsigned long start, 162d935cc61SDaniel Vetter unsigned long end); 163709ea971SDaniel Vetter int drm_mm_scan_add_block(struct drm_mm_node *node); 164709ea971SDaniel Vetter int drm_mm_scan_remove_block(struct drm_mm_node *node); 165709ea971SDaniel Vetter 16699d7e48eSJerome Glisse extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix); 167fa8a1238SDave Airlie #ifdef CONFIG_DEBUG_FS 168fa8a1238SDave Airlie int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm); 169fa8a1238SDave Airlie #endif 170fa8a1238SDave Airlie 171249d6048SJerome Glisse #endif 172