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 { 5925985edcSLucas De Marchi /* List of all memory nodes that immediately precede 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; 75ae0cec28SDaniel Vetter struct drm_mm_node *prev_scanned_node; 76249d6048SJerome Glisse }; 77249d6048SJerome Glisse 78b0b7af18SDaniel Vetter static inline bool drm_mm_node_allocated(struct drm_mm_node *node) 79b0b7af18SDaniel Vetter { 80b0b7af18SDaniel Vetter return node->allocated; 81b0b7af18SDaniel Vetter } 82b0b7af18SDaniel Vetter 8331a5b8ceSDaniel Vetter static inline bool drm_mm_initialized(struct drm_mm *mm) 8431a5b8ceSDaniel Vetter { 85ea7b1dd4SDaniel Vetter return mm->hole_stack.next; 8631a5b8ceSDaniel Vetter } 87ea7b1dd4SDaniel Vetter #define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \ 88ea7b1dd4SDaniel Vetter &(mm)->head_node.node_list, \ 89ea7b1dd4SDaniel Vetter node_list); 90ae0cec28SDaniel Vetter #define drm_mm_for_each_scanned_node_reverse(entry, n, mm) \ 91ae0cec28SDaniel Vetter for (entry = (mm)->prev_scanned_node, \ 92ae0cec28SDaniel Vetter next = entry ? list_entry(entry->node_list.next, \ 93ae0cec28SDaniel Vetter struct drm_mm_node, node_list) : NULL; \ 94ae0cec28SDaniel Vetter entry != NULL; entry = next, \ 95ae0cec28SDaniel Vetter next = entry ? list_entry(entry->node_list.next, \ 96ae0cec28SDaniel Vetter struct drm_mm_node, node_list) : NULL) \ 97249d6048SJerome Glisse /* 98249d6048SJerome Glisse * Basic range manager support (drm_mm.c) 99249d6048SJerome Glisse */ 10089579f77SThomas Hellstrom extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node, 101249d6048SJerome Glisse unsigned long size, 10289579f77SThomas Hellstrom unsigned alignment, 10389579f77SThomas Hellstrom int atomic); 104a2e68e92SJerome Glisse extern struct drm_mm_node *drm_mm_get_block_range_generic( 105a2e68e92SJerome Glisse struct drm_mm_node *node, 106a2e68e92SJerome Glisse unsigned long size, 107a2e68e92SJerome Glisse unsigned alignment, 108a2e68e92SJerome Glisse unsigned long start, 109a2e68e92SJerome Glisse unsigned long end, 110a2e68e92SJerome Glisse int atomic); 11189579f77SThomas Hellstrom static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent, 112249d6048SJerome Glisse unsigned long size, 11389579f77SThomas Hellstrom unsigned alignment) 11489579f77SThomas Hellstrom { 11589579f77SThomas Hellstrom return drm_mm_get_block_generic(parent, size, alignment, 0); 11689579f77SThomas Hellstrom } 11789579f77SThomas Hellstrom static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent, 11889579f77SThomas Hellstrom unsigned long size, 11989579f77SThomas Hellstrom unsigned alignment) 12089579f77SThomas Hellstrom { 12189579f77SThomas Hellstrom return drm_mm_get_block_generic(parent, size, alignment, 1); 12289579f77SThomas Hellstrom } 123a2e68e92SJerome Glisse static inline struct drm_mm_node *drm_mm_get_block_range( 124a2e68e92SJerome Glisse struct drm_mm_node *parent, 125a2e68e92SJerome Glisse unsigned long size, 126a2e68e92SJerome Glisse unsigned alignment, 127a2e68e92SJerome Glisse unsigned long start, 128a2e68e92SJerome Glisse unsigned long end) 129a2e68e92SJerome Glisse { 130a2e68e92SJerome Glisse return drm_mm_get_block_range_generic(parent, size, alignment, 131a2e68e92SJerome Glisse start, end, 0); 132a2e68e92SJerome Glisse } 133a2e68e92SJerome Glisse static inline struct drm_mm_node *drm_mm_get_block_atomic_range( 134a2e68e92SJerome Glisse struct drm_mm_node *parent, 135a2e68e92SJerome Glisse unsigned long size, 136a2e68e92SJerome Glisse unsigned alignment, 137a2e68e92SJerome Glisse unsigned long start, 138a2e68e92SJerome Glisse unsigned long end) 139a2e68e92SJerome Glisse { 140a2e68e92SJerome Glisse return drm_mm_get_block_range_generic(parent, size, alignment, 141a2e68e92SJerome Glisse start, end, 1); 142a2e68e92SJerome Glisse } 143b0b7af18SDaniel Vetter extern int drm_mm_insert_node(struct drm_mm *mm, struct drm_mm_node *node, 144b0b7af18SDaniel Vetter unsigned long size, unsigned alignment); 145b0b7af18SDaniel Vetter extern int drm_mm_insert_node_in_range(struct drm_mm *mm, 146b0b7af18SDaniel Vetter struct drm_mm_node *node, 147b0b7af18SDaniel Vetter unsigned long size, unsigned alignment, 148b0b7af18SDaniel Vetter unsigned long start, unsigned long end); 149249d6048SJerome Glisse extern void drm_mm_put_block(struct drm_mm_node *cur); 150b0b7af18SDaniel Vetter extern void drm_mm_remove_node(struct drm_mm_node *node); 151b0b7af18SDaniel Vetter extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new); 152249d6048SJerome Glisse extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm, 153249d6048SJerome Glisse unsigned long size, 154249d6048SJerome Glisse unsigned alignment, 155249d6048SJerome Glisse int best_match); 156a2e68e92SJerome Glisse extern struct drm_mm_node *drm_mm_search_free_in_range( 157a2e68e92SJerome Glisse const struct drm_mm *mm, 158a2e68e92SJerome Glisse unsigned long size, 159a2e68e92SJerome Glisse unsigned alignment, 160a2e68e92SJerome Glisse unsigned long start, 161a2e68e92SJerome Glisse unsigned long end, 162a2e68e92SJerome Glisse int best_match); 163249d6048SJerome Glisse extern int drm_mm_init(struct drm_mm *mm, unsigned long start, 164249d6048SJerome Glisse unsigned long size); 165249d6048SJerome Glisse extern void drm_mm_takedown(struct drm_mm *mm); 166249d6048SJerome Glisse extern int drm_mm_clean(struct drm_mm *mm); 167249d6048SJerome Glisse extern int drm_mm_pre_get(struct drm_mm *mm); 168249d6048SJerome Glisse 169249d6048SJerome Glisse static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block) 170249d6048SJerome Glisse { 171249d6048SJerome Glisse return block->mm; 172249d6048SJerome Glisse } 173249d6048SJerome Glisse 174709ea971SDaniel Vetter void drm_mm_init_scan(struct drm_mm *mm, unsigned long size, 175709ea971SDaniel Vetter unsigned alignment); 176d935cc61SDaniel Vetter void drm_mm_init_scan_with_range(struct drm_mm *mm, unsigned long size, 177d935cc61SDaniel Vetter unsigned alignment, 178d935cc61SDaniel Vetter unsigned long start, 179d935cc61SDaniel Vetter unsigned long end); 180709ea971SDaniel Vetter int drm_mm_scan_add_block(struct drm_mm_node *node); 181709ea971SDaniel Vetter int drm_mm_scan_remove_block(struct drm_mm_node *node); 182709ea971SDaniel Vetter 18399d7e48eSJerome Glisse extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix); 184fa8a1238SDave Airlie #ifdef CONFIG_DEBUG_FS 185fa8a1238SDave Airlie int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm); 186fa8a1238SDave Airlie #endif 187fa8a1238SDave Airlie 188249d6048SJerome Glisse #endif 189