1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _NET_PAGE_POOL_MEMORY_PROVIDER_H 3 #define _NET_PAGE_POOL_MEMORY_PROVIDER_H 4 5 #include <net/netmem.h> 6 #include <net/page_pool/types.h> 7 8 struct netdev_rx_queue; 9 struct sk_buff; 10 11 struct memory_provider_ops { 12 netmem_ref (*alloc_netmems)(struct page_pool *pool, gfp_t gfp); 13 bool (*release_netmem)(struct page_pool *pool, netmem_ref netmem); 14 int (*init)(struct page_pool *pool); 15 void (*destroy)(struct page_pool *pool); 16 int (*nl_fill)(void *mp_priv, struct sk_buff *rsp, 17 struct netdev_rx_queue *rxq); 18 void (*uninstall)(void *mp_priv, struct netdev_rx_queue *rxq); 19 }; 20 21 bool net_mp_niov_set_dma_addr(struct net_iov *niov, dma_addr_t addr); 22 void net_mp_niov_set_page_pool(struct page_pool *pool, struct net_iov *niov); 23 void net_mp_niov_clear_page_pool(struct net_iov *niov); 24 25 int net_mp_open_rxq(struct net_device *dev, unsigned ifq_idx, 26 struct pp_memory_provider_params *p); 27 void net_mp_close_rxq(struct net_device *dev, unsigned ifq_idx, 28 struct pp_memory_provider_params *old_p); 29 30 /** 31 * net_mp_netmem_place_in_cache() - give a netmem to a page pool 32 * @pool: the page pool to place the netmem into 33 * @netmem: netmem to give 34 * 35 * Push an accounted netmem into the page pool's allocation cache. The caller 36 * must ensure that there is space in the cache. It should only be called off 37 * the mp_ops->alloc_netmems() path. 38 */ 39 static inline void net_mp_netmem_place_in_cache(struct page_pool *pool, 40 netmem_ref netmem) 41 { 42 pool->alloc.cache[pool->alloc.count++] = netmem; 43 } 44 45 #endif 46