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