1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * Dmabuf device memory provider.
4 *
5 * Authors: Mina Almasry <almasrymina@google.com>
6 *
7 */
8 #ifndef _NET_MP_DMABUF_DEVMEM_H
9 #define _NET_MP_DMABUF_DEVMEM_H
10
11 #include <net/netmem.h>
12
13 #if defined(CONFIG_NET_DEVMEM)
14 int mp_dmabuf_devmem_init(struct page_pool *pool);
15
16 netmem_ref mp_dmabuf_devmem_alloc_netmems(struct page_pool *pool, gfp_t gfp);
17
18 void mp_dmabuf_devmem_destroy(struct page_pool *pool);
19
20 bool mp_dmabuf_devmem_release_page(struct page_pool *pool, netmem_ref netmem);
21 #else
22 static inline int mp_dmabuf_devmem_init(struct page_pool *pool)
23 {
24 return -EOPNOTSUPP;
25 }
26
27 static inline netmem_ref
28 mp_dmabuf_devmem_alloc_netmems(struct page_pool *pool, gfp_t gfp)
29 {
30 return 0;
31 }
32
33 static inline void mp_dmabuf_devmem_destroy(struct page_pool *pool)
34 {
35 }
36
37 static inline bool
38 mp_dmabuf_devmem_release_page(struct page_pool *pool, netmem_ref netmem)
39 {
40 return false;
41 }
42 #endif
43
44 #endif /* _NET_MP_DMABUF_DEVMEM_H */
45
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