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 struct mutex buf_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);
23 #else
hwbm_buf_free(struct hwbm_pool * bm_pool,void * buf)24 static inline void hwbm_buf_free(struct hwbm_pool *bm_pool, void *buf) {}
25
hwbm_pool_refill(struct hwbm_pool * bm_pool,gfp_t gfp)26 static inline int hwbm_pool_refill(struct hwbm_pool *bm_pool, gfp_t gfp)
27 { return 0; }
28
hwbm_pool_add(struct hwbm_pool * bm_pool,unsigned int buf_num)29 static inline int hwbm_pool_add(struct hwbm_pool *bm_pool,
30 unsigned int buf_num)
31 { return 0; }
32 #endif /* CONFIG_HWBM */
33 #endif /* _HWBM_H */
34