3f2bc4d6eb
msm-2.6.38: tag AU_LINUX_ANDROID_GINGERBREAD.02.03.04.00.142 Signed-off-by: Bryan Huntsman <bryanh@codeaurora.org>
61 lines
1.9 KiB
C
61 lines
1.9 KiB
C
/*
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* Basic general purpose allocator for managing special purpose memory
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* not managed by the regular kmalloc/kfree interface.
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* Uses for this includes on-device special memory, uncached memory
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* etc.
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*
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* This source code is licensed under the GNU General Public License,
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* Version 2. See the file COPYING for more details.
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*/
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#ifndef __GENALLOC_H__
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#define __GENALLOC_H__
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struct gen_pool;
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struct gen_pool *__must_check gen_pool_create(unsigned order, int nid);
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void gen_pool_destroy(struct gen_pool *pool);
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unsigned long __must_check
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gen_pool_alloc_aligned(struct gen_pool *pool, size_t size,
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unsigned alignment_order);
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/**
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* gen_pool_alloc() - allocate special memory from the pool
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* @pool: Pool to allocate from.
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* @size: Number of bytes to allocate from the pool.
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*
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* Allocate the requested number of bytes from the specified pool.
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* Uses a first-fit algorithm.
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*/
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static inline unsigned long __must_check
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gen_pool_alloc(struct gen_pool *pool, size_t size)
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{
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return gen_pool_alloc_aligned(pool, size, 0);
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}
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void gen_pool_free(struct gen_pool *pool, unsigned long addr, size_t size);
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extern phys_addr_t gen_pool_virt_to_phys(struct gen_pool *pool, unsigned long);
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extern int gen_pool_add_virt(struct gen_pool *, unsigned long, phys_addr_t,
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size_t, int);
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/**
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* gen_pool_add - add a new chunk of special memory to the pool
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* @pool: pool to add new memory chunk to
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* @addr: starting address of memory chunk to add to pool
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* @size: size in bytes of the memory chunk to add to pool
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* @nid: node id of the node the chunk structure and bitmap should be
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* allocated on, or -1
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*
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* Add a new chunk of special memory to the specified pool.
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*
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* Returns 0 on success or a -ve errno on failure.
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*/
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static inline int __must_check gen_pool_add(struct gen_pool *pool, unsigned long addr,
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size_t size, int nid)
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{
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return gen_pool_add_virt(pool, addr, -1, size, nid);
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}
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#endif /* __GENALLOC_H__ */
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