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
10/* This structure contains an instance of an RX queue. */
11struct netdev_rx_queue {
12	struct xdp_rxq_info		xdp_rxq;
13#ifdef CONFIG_RPS
14	struct rps_map __rcu		*rps_map;
15	struct rps_dev_flow_table __rcu	*rps_flow_table;
16#endif
17	struct kobject			kobj;
18	struct net_device		*dev;
19	netdevice_tracker		dev_tracker;
20
21#ifdef CONFIG_XDP_SOCKETS
22	struct xsk_buff_pool            *pool;
23#endif
24	/* NAPI instance for the queue
25	 * Readers and writers must hold RTNL
26	 */
27	struct napi_struct		*napi;
28} ____cacheline_aligned_in_smp;
29
30/*
31 * RX queue sysfs structures and functions.
32 */
33struct rx_queue_attribute {
34	struct attribute attr;
35	ssize_t (*show)(struct netdev_rx_queue *queue, char *buf);
36	ssize_t (*store)(struct netdev_rx_queue *queue,
37			 const char *buf, size_t len);
38};
39
40static inline struct netdev_rx_queue *
41__netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
42{
43	return dev->_rx + rxq;
44}
45
46#ifdef CONFIG_SYSFS
47static inline unsigned int
48get_netdev_rx_queue_index(struct netdev_rx_queue *queue)
49{
50	struct net_device *dev = queue->dev;
51	int index = queue - dev->_rx;
52
53	BUG_ON(index >= dev->num_rx_queues);
54	return index;
55}
56#endif
57#endif
58