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 netlink_ext_ack; 10 struct sk_buff; 11 12 struct memory_provider_ops { 13 netmem_ref (*alloc_netmems)(struct page_pool *pool, gfp_t gfp); 14 bool (*release_netmem)(struct page_pool *pool, netmem_ref netmem); 15 int (*init)(struct page_pool *pool); 16 void (*destroy)(struct page_pool *pool); 17 int (*nl_fill)(void *mp_priv, struct sk_buff *rsp, 18 struct netdev_rx_queue *rxq); 19 void (*uninstall)(void *mp_priv, struct netdev_rx_queue *rxq); 20 }; 21 22 bool net_mp_niov_set_dma_addr(struct net_iov *niov, dma_addr_t addr); 23 void net_mp_niov_set_page_pool(struct page_pool *pool, struct net_iov *niov); 24 void net_mp_niov_clear_page_pool(struct net_iov *niov); 25 26 int netif_mp_open_rxq(struct net_device *dev, unsigned int rxq_idx, 27 const struct pp_memory_provider_params *p, 28 struct netlink_ext_ack *extack); 29 void netif_mp_close_rxq(struct net_device *dev, unsigned int rxq_idx, 30 const struct pp_memory_provider_params *old_p); 31 32 /** 33 * net_mp_netmem_place_in_cache() - give a netmem to a page pool 34 * @pool: the page pool to place the netmem into 35 * @netmem: netmem to give 36 * 37 * Push an accounted netmem into the page pool's allocation cache. The caller 38 * must ensure that there is space in the cache. It should only be called off 39 * the mp_ops->alloc_netmems() path. 40 */ 41 static inline void net_mp_netmem_place_in_cache(struct page_pool *pool, 42 netmem_ref netmem) 43 { 44 pool->alloc.cache[pool->alloc.count++] = netmem; 45 } 46 47 #endif 48