2012-01-09 22:51:56 +00:00
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/*
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* zsmalloc memory allocator
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*
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* Copyright (C) 2011 Nitin Gupta
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*
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* This code is released using a dual license strategy: BSD/GPL
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* You can choose the license that better fits your requirements.
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*
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* Released under the terms of 3-clause BSD License
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* Released under the terms of GNU General Public License Version 2.0
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*/
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#ifndef _ZS_MALLOC_H_
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#define _ZS_MALLOC_H_
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#include <linux/types.h>
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2012-07-02 21:15:52 +00:00
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/*
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* zsmalloc mapping modes
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*
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2013-12-11 02:04:37 +00:00
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* NOTE: These only make a difference when a mapped object spans pages.
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* They also have no effect when PGTABLE_MAPPING is selected.
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2013-05-20 19:18:14 +00:00
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*/
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2012-07-02 21:15:52 +00:00
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enum zs_mapmode {
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ZS_MM_RW, /* normal read-write mapping */
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ZS_MM_RO, /* read-only (no copy-out at unmap time) */
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ZS_MM_WO /* write-only (no copy-in at map time) */
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2013-12-11 02:04:37 +00:00
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/*
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* NOTE: ZS_MM_WO should only be used for initializing new
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* (uninitialized) allocations. Partial writes to already
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* initialized allocations should use ZS_MM_RW to preserve the
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* existing data.
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*/
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2012-07-02 21:15:52 +00:00
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};
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2012-01-09 22:51:56 +00:00
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struct zs_pool;
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2013-01-30 15:36:52 +00:00
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struct zs_pool *zs_create_pool(gfp_t flags);
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2012-01-09 22:51:56 +00:00
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void zs_destroy_pool(struct zs_pool *pool);
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2012-06-08 06:39:25 +00:00
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unsigned long zs_malloc(struct zs_pool *pool, size_t size);
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void zs_free(struct zs_pool *pool, unsigned long obj);
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2012-01-09 22:51:56 +00:00
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2012-07-02 21:15:52 +00:00
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void *zs_map_object(struct zs_pool *pool, unsigned long handle,
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enum zs_mapmode mm);
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2012-06-08 06:39:25 +00:00
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void zs_unmap_object(struct zs_pool *pool, unsigned long handle);
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2012-01-09 22:51:56 +00:00
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u64 zs_get_total_size_bytes(struct zs_pool *pool);
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#endif
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