1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_NETDEV_RX_QUEUE_H 3 #define _LINUX_NETDEV_RX_QUEUE_H 4 5 #include <linux/kobject.h> 6 #include <linux/netdevice.h> 7 #include <linux/sysfs.h> 8 #include <net/xdp.h> 9 #include <net/page_pool/types.h> 10 11 /* This structure contains an instance of an RX queue. */ 12 struct netdev_rx_queue { 13 struct xdp_rxq_info xdp_rxq; 14 #ifdef CONFIG_RPS 15 struct rps_map __rcu *rps_map; 16 struct rps_dev_flow_table __rcu *rps_flow_table; 17 #endif 18 struct kobject kobj; 19 const struct attribute_group **groups; 20 struct net_device *dev; 21 netdevice_tracker dev_tracker; 22 23 /* All fields below are "ops protected", 24 * see comment about net_device::lock 25 */ 26 #ifdef CONFIG_XDP_SOCKETS 27 struct xsk_buff_pool *pool; 28 #endif 29 struct napi_struct *napi; 30 struct pp_memory_provider_params mp_params; 31 struct netdev_rx_queue *lease; 32 netdevice_tracker lease_tracker; 33 } ____cacheline_aligned_in_smp; 34 35 /* 36 * RX queue sysfs structures and functions. 37 */ 38 struct rx_queue_attribute { 39 struct attribute attr; 40 ssize_t (*show)(struct netdev_rx_queue *queue, char *buf); 41 ssize_t (*store)(struct netdev_rx_queue *queue, 42 const char *buf, size_t len); 43 }; 44 45 static inline struct netdev_rx_queue * 46 __netif_get_rx_queue(struct net_device *dev, unsigned int rxq) 47 { 48 return dev->_rx + rxq; 49 } 50 51 static inline unsigned int 52 get_netdev_rx_queue_index(struct netdev_rx_queue *queue) 53 { 54 struct net_device *dev = queue->dev; 55 int index = queue - dev->_rx; 56 57 BUG_ON(index >= dev->num_rx_queues); 58 return index; 59 } 60 61 int netdev_rx_queue_restart(struct net_device *dev, unsigned int rxq); 62 void netdev_rx_queue_lease(struct netdev_rx_queue *rxq_dst, 63 struct netdev_rx_queue *rxq_src); 64 void netdev_rx_queue_unlease(struct netdev_rx_queue *rxq_dst, 65 struct netdev_rx_queue *rxq_src); 66 bool netif_rx_queue_lease_get_owner(struct net_device **dev, unsigned int *rxq); 67 68 enum netif_lease_dir { 69 NETIF_VIRT_TO_PHYS, 70 NETIF_PHYS_TO_VIRT, 71 }; 72 73 struct netdev_rx_queue * 74 __netif_get_rx_queue_lease(struct net_device **dev, unsigned int *rxq, 75 enum netif_lease_dir dir); 76 struct netdev_rx_queue * 77 netif_get_rx_queue_lease_locked(struct net_device **dev, unsigned int *rxq); 78 void netif_put_rx_queue_lease_locked(struct net_device *orig_dev, 79 struct net_device *dev); 80 #endif /* _LINUX_NETDEV_RX_QUEUE_H */ 81