projects/linux·blob uaccess-cleanups · refs

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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. */
14struct 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 */
47struct 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
54static 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
60static inline unsigned int
61get_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
70enum netif_lease_dir {
71 NETIF_VIRT_TO_PHYS,
72 NETIF_PHYS_TO_VIRT,
73};
74
75struct netdev_rx_queue *
76__netif_get_rx_queue_lease(struct net_device **dev, unsigned int *rxq,
77 enum netif_lease_dir dir);
78
79int netdev_rx_queue_restart(struct net_device *dev, unsigned int rxq);
80void netdev_rx_queue_lease(struct netdev_rx_queue *rxq_dst,
81 struct netdev_rx_queue *rxq_src);
82void netdev_rx_queue_unlease(struct netdev_rx_queue *rxq_dst,
83 struct netdev_rx_queue *rxq_src);
84#endif /* _LINUX_NETDEV_RX_QUEUE_H */