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35 lines · 997 B

1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _HWBM_H
3#define _HWBM_H
4
5#include <linux/mutex.h>
6
7struct 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
22void hwbm_buf_free(struct hwbm_pool *bm_pool, void *buf);
23int hwbm_pool_refill(struct hwbm_pool *bm_pool, gfp_t gfp);
24int hwbm_pool_add(struct hwbm_pool *bm_pool, unsigned int buf_num);
25#else
26static inline void hwbm_buf_free(struct hwbm_pool *bm_pool, void *buf) {}
27
28static inline int hwbm_pool_refill(struct hwbm_pool *bm_pool, gfp_t gfp)
29{ return 0; }
30
31static 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 */