1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _HWBM_H
3 #define _HWBM_H
4 
5 struct hwbm_pool {
6 	/* Capacity of the pool */
7 	int size;
8 	/* Size of the buffers managed */
9 	int frag_size;
10 	/* Number of buffers currently used by this pool */
11 	int buf_num;
12 	/* constructor called during alocation */
13 	int (*construct)(struct hwbm_pool *bm_pool, void *buf);
14 	/* protect acces to the buffer counter*/
15 	spinlock_t lock;
16 	/* private data */
17 	void *priv;
18 };
19 #ifdef CONFIG_HWBM
20 void hwbm_buf_free(struct hwbm_pool *bm_pool, void *buf);
21 int hwbm_pool_refill(struct hwbm_pool *bm_pool, gfp_t gfp);
22 int hwbm_pool_add(struct hwbm_pool *bm_pool, unsigned int buf_num, gfp_t gfp);
23 #else
hwbm_buf_free(struct hwbm_pool * bm_pool,void * buf)24 void hwbm_buf_free(struct hwbm_pool *bm_pool, void *buf) {}
hwbm_pool_refill(struct hwbm_pool * bm_pool,gfp_t gfp)25 int hwbm_pool_refill(struct hwbm_pool *bm_pool, gfp_t gfp) { return 0; }
hwbm_pool_add(struct hwbm_pool * bm_pool,unsigned int buf_num,gfp_t gfp)26 int hwbm_pool_add(struct hwbm_pool *bm_pool, unsigned int buf_num, gfp_t gfp)
27 { return 0; }
28 #endif /* CONFIG_HWBM */
29 #endif /* _HWBM_H */
30