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 #include <net/netdev_queues.h> 11 #include <net/rps-types.h> 12 13 /* This structure contains an instance of an RX queue. */ 14 struct netdev_rx_queue { 15 struct xdp_rxq_info xdp_rxq; 16 #ifdef CONFIG_RPS 17 struct rps_map __rcu *rps_map; 18 rps_tag_ptr rps_flow_table; 19 #endif 20 struct kobject kobj; 21 const struct attribute_group **groups; 22 struct net_device *dev; 23 netdevice_tracker dev_tracker; 24 25 /* All fields below are "ops protected", 26 * see comment about net_device::lock 27 */ 28 #ifdef CONFIG_XDP_SOCKETS 29 struct xsk_buff_pool *pool; 30 #endif 31 struct napi_struct *napi; 32 struct netdev_queue_config qcfg; 33 struct pp_memory_provider_params mp_params; 34 35 /* If a queue is leased, then the lease pointer is always 36 * valid. From the physical device it points to the virtual 37 * queue, and from the virtual device it points to the 38 * physical queue. 39 */ 40 struct netdev_rx_queue *lease; 41 netdevice_tracker lease_tracker; 42 } ____cacheline_aligned_in_smp; 43 44 /* 45 * RX queue sysfs structures and functions. 46 */ 47 struct rx_queue_attribute { 48 struct attribute attr; 49 ssize_t (*show)(struct netdev_rx_queue *queue, char *buf); 50 ssize_t (*store)(struct netdev_rx_queue *queue, 51 const char *buf, size_t len); 52 }; 53 54 static inline struct netdev_rx_queue * 55 __netif_get_rx_queue(struct net_device *dev, unsigned int rxq) 56 { 57 return dev->_rx + rxq; 58 } 59 60 static inline unsigned int 61 get_netdev_rx_queue_index(struct netdev_rx_queue *queue) 62 { 63 struct net_device *dev = queue->dev; 64 int index = queue - dev->_rx; 65 66 BUG_ON(index >= dev->num_rx_queues); 67 return index; 68 } 69 70 enum netif_lease_dir { 71 NETIF_VIRT_TO_PHYS, 72 NETIF_PHYS_TO_VIRT, 73 }; 74 75 struct netdev_rx_queue * 76 __netif_get_rx_queue_lease(struct net_device **dev, unsigned int *rxq, 77 enum netif_lease_dir dir); 78 79 int netdev_rx_queue_restart(struct net_device *dev, unsigned int rxq); 80 void netdev_rx_queue_lease(struct netdev_rx_queue *rxq_dst, 81 struct netdev_rx_queue *rxq_src); 82 void netdev_rx_queue_unlease(struct netdev_rx_queue *rxq_dst, 83 struct netdev_rx_queue *rxq_src); 84 #endif /* _LINUX_NETDEV_RX_QUEUE_H */ 85