1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _HWBM_H
3 #define _HWBM_H
4
5 #include <linux/mutex.h>
6
7 struct hwbm_pool {
8 /* Capacity of the pool */
9 int size;
10 /* Size of the buffers managed */
11 int frag_size;
12 /* Number of buffers currently used by this pool */
13 int buf_num;
14 /* constructor called during allocation */
15 int (*construct)(struct hwbm_pool *bm_pool, void *buf);
16 /* protect access to the buffer counter*/
17 struct mutex buf_lock;
18 /* private data */
19 void *priv;
20 };
21 #ifdef CONFIG_HWBM
22 void hwbm_buf_free(struct hwbm_pool *bm_pool, void *buf);
23 int hwbm_pool_refill(struct hwbm_pool *bm_pool, gfp_t gfp);
24 int hwbm_pool_add(struct hwbm_pool *bm_pool, unsigned int buf_num);
25 #else
hwbm_buf_free(struct hwbm_pool * bm_pool,void * buf)26 static inline void hwbm_buf_free(struct hwbm_pool *bm_pool, void *buf) {}
27
hwbm_pool_refill(struct hwbm_pool * bm_pool,gfp_t gfp)28 static inline int hwbm_pool_refill(struct hwbm_pool *bm_pool, gfp_t gfp)
29 { return 0; }
30
hwbm_pool_add(struct hwbm_pool * bm_pool,unsigned int buf_num)31 static inline int hwbm_pool_add(struct hwbm_pool *bm_pool,
32 unsigned int buf_num)
33 { return 0; }
34 #endif /* CONFIG_HWBM */
35 #endif /* _HWBM_H */
36