1 /* SPDX-License-Identifier: GPL-2.0-only */
5  * kmalloc/kfree interface.  Uses for this includes on-device special
21  * On architectures that don't have NMI-safe cmpxchg implementation,
42  * @size: The bitmap size in bits
45  * @data: optional additional data used by the callback
49 			unsigned long size,
52 			void *data, struct gen_pool *pool,
64 	void *data;  member
76 	void *owner;			/* private data to retrieve at alloc time */
83  *  gen_pool data descriptor for gen_pool_first_fit_align.
90  *  gen_pool data descriptor for gen_pool_fixed_alloc.
102 		phys_addr_t phys, size_t size, int nid)  in gen_pool_add_virt()  argument
104 	return gen_pool_add_owner(pool, addr, phys, size, nid, NULL);  in gen_pool_add_virt()
108  * gen_pool_add - add a new chunk of special memory to the pool
111  * @size: size in bytes of the memory chunk to add to pool
113  *       allocated on, or -1
117  * Returns 0 on success or a -ve errno on failure.
120 			       size_t size, int nid)  in gen_pool_add()  argument
122 	return gen_pool_add_virt(pool, addr, -1, size, nid);  in gen_pool_add()
125 unsigned long gen_pool_alloc_algo_owner(struct gen_pool *pool, size_t size,
126 		genpool_algo_t algo, void *data, void **owner);
129 		size_t size, void **owner)  in gen_pool_alloc_owner()  argument
131 	return gen_pool_alloc_algo_owner(pool, size, pool->algo, pool->data,  in gen_pool_alloc_owner()
136 		size_t size, genpool_algo_t algo, void *data)  in gen_pool_alloc_algo()  argument
138 	return gen_pool_alloc_algo_owner(pool, size, algo, data, NULL);  in gen_pool_alloc_algo()
142  * gen_pool_alloc - allocate special memory from the pool
144  * @size: number of bytes to allocate from the pool
147  * Uses the pool allocation function (with first-fit algorithm by default).
149  * NMI-safe cmpxchg implementation.
151 static inline unsigned long gen_pool_alloc(struct gen_pool *pool, size_t size)  in gen_pool_alloc()  argument
153 	return gen_pool_alloc_algo(pool, size, pool->algo, pool->data);  in gen_pool_alloc()
156 extern void *gen_pool_dma_alloc(struct gen_pool *pool, size_t size,
158 extern void *gen_pool_dma_alloc_algo(struct gen_pool *pool, size_t size,
159 		dma_addr_t *dma, genpool_algo_t algo, void *data);
160 extern void *gen_pool_dma_alloc_align(struct gen_pool *pool, size_t size,
162 extern void *gen_pool_dma_zalloc(struct gen_pool *pool, size_t size, dma_addr_t *dma);
163 extern void *gen_pool_dma_zalloc_algo(struct gen_pool *pool, size_t size,
164 		dma_addr_t *dma, genpool_algo_t algo, void *data);
165 extern void *gen_pool_dma_zalloc_align(struct gen_pool *pool, size_t size,
168 		size_t size, void **owner);
170                 size_t size)  in gen_pool_free()  argument
172 	gen_pool_free_owner(pool, addr, size, NULL);  in gen_pool_free()
181 		void *data);
183 extern unsigned long gen_pool_first_fit(unsigned long *map, unsigned long size,
184 		unsigned long start, unsigned int nr, void *data,
188 		unsigned long size, unsigned long start, unsigned int nr,
189 		void *data, struct gen_pool *pool, unsigned long start_addr);
192 		unsigned long size, unsigned long start, unsigned int nr,
193 		void *data, struct gen_pool *pool, unsigned long start_addr);
197 		unsigned long size, unsigned long start, unsigned int nr,
198 		void *data, struct gen_pool *pool, unsigned long start_addr);
200 extern unsigned long gen_pool_best_fit(unsigned long *map, unsigned long size,
201 		unsigned long start, unsigned int nr, void *data,
210 			size_t size);