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