include/net/netdev_rx_queue.h

   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         struct net_device               *dev;
  20         netdevice_tracker               dev_tracker;
  21
  22 #ifdef CONFIG_XDP_SOCKETS
  23         struct xsk_buff_pool            *pool;
  24 #endif
  25         /* NAPI instance for the queue
  26          * Readers and writers must hold RTNL
  27          */
  28         struct napi_struct              *napi;
  29         struct pp_memory_provider_params mp_params;
  30 } ____cacheline_aligned_in_smp;
  31
  32 /*
  33  * RX queue sysfs structures and functions.
  34  */
  35 struct rx_queue_attribute {
  36         struct attribute attr;
  37         ssize_t (*show)(struct netdev_rx_queue *queue, char *buf);
  38         ssize_t (*store)(struct netdev_rx_queue *queue,
  39                          const char *buf, size_t len);
  40 };
  41
  42 static inline struct netdev_rx_queue *
  43 __netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
  44 {
  45         return dev->_rx + rxq;
  46 }
  47
  48 static inline unsigned int
  49 get_netdev_rx_queue_index(struct netdev_rx_queue *queue)
  50 {
  51         struct net_device *dev = queue->dev;
  52         int index = queue - dev->_rx;
  53
  54         BUG_ON(index >= dev->num_rx_queues);
  55         return index;
  56 }
  57
  58 int netdev_rx_queue_restart(struct net_device *dev, unsigned int rxq);
  59
  60 #endif