1 /* 2 * zsmalloc memory allocator 3 * 4 * Copyright (C) 2011 Nitin Gupta 5 * Copyright (C) 2012, 2013 Minchan Kim 6 * 7 * This code is released using a dual license strategy: BSD/GPL 8 * You can choose the license that better fits your requirements. 9 * 10 * Released under the terms of 3-clause BSD License 11 * Released under the terms of GNU General Public License Version 2.0 12 */ 13 14 #ifndef _ZS_MALLOC_H_ 15 #define _ZS_MALLOC_H_ 16 17 #include <linux/types.h> 18 19 struct zs_pool_stats { 20 /* How many pages were migrated (freed) */ 21 atomic_long_t pages_compacted; 22 }; 23 24 struct zs_pool; 25 struct scatterlist; 26 27 struct zs_pool *zs_create_pool(const char *name); 28 void zs_destroy_pool(struct zs_pool *pool); 29 30 unsigned long zs_malloc(struct zs_pool *pool, size_t size, gfp_t flags, 31 const int nid); 32 void zs_free(struct zs_pool *pool, unsigned long obj); 33 34 size_t zs_huge_class_size(struct zs_pool *pool); 35 36 unsigned long zs_get_total_pages(struct zs_pool *pool); 37 unsigned long zs_compact(struct zs_pool *pool); 38 39 unsigned int zs_lookup_class_index(struct zs_pool *pool, unsigned int size); 40 41 void zs_pool_stats(struct zs_pool *pool, struct zs_pool_stats *stats); 42 43 void *zs_obj_read_begin(struct zs_pool *pool, unsigned long handle, 44 size_t mem_len, void *local_copy); 45 void zs_obj_read_end(struct zs_pool *pool, unsigned long handle, 46 size_t mem_len, void *handle_mem); 47 void zs_obj_read_sg_begin(struct zs_pool *pool, unsigned long handle, 48 struct scatterlist *sg, size_t mem_len); 49 void zs_obj_read_sg_end(struct zs_pool *pool, unsigned long handle); 50 void zs_obj_write(struct zs_pool *pool, unsigned long handle, 51 void *handle_mem, size_t mem_len); 52 53 extern const struct movable_operations zsmalloc_mops; 54 55 #endif 56