forked from mirrors/linux
7c88f86576
Add netdev_rx_queue_restart(), which resets an rx queue using the queue API recently merged[1]. The queue API was merged to enable the core net stack to reset individual rx queues to actuate changes in the rx queue's configuration. In later patches in this series, we will use netdev_rx_queue_restart() to reset rx queues after binding or unbinding dmabuf configuration, which will cause reallocation of the page_pool to repopulate its memory using the new configuration. [1] https://lore.kernel.org/netdev/20240430231420.699177-1-shailend@google.com/T/ Signed-off-by: David Wei <dw@davidwei.uk> Signed-off-by: Mina Almasry <almasrymina@google.com> Reviewed-by: Pavel Begunkov <asml.silence@gmail.com> Reviewed-by: Jakub Kicinski <kuba@kernel.org> Link: https://patch.msgid.link/20240910171458.219195-2-almasrymina@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_NETDEV_RX_QUEUE_H
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#define _LINUX_NETDEV_RX_QUEUE_H
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#include <linux/kobject.h>
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#include <linux/netdevice.h>
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#include <linux/sysfs.h>
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#include <net/xdp.h>
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/* This structure contains an instance of an RX queue. */
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struct netdev_rx_queue {
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struct xdp_rxq_info xdp_rxq;
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#ifdef CONFIG_RPS
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struct rps_map __rcu *rps_map;
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struct rps_dev_flow_table __rcu *rps_flow_table;
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#endif
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struct kobject kobj;
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struct net_device *dev;
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netdevice_tracker dev_tracker;
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#ifdef CONFIG_XDP_SOCKETS
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struct xsk_buff_pool *pool;
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#endif
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/* NAPI instance for the queue
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* Readers and writers must hold RTNL
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*/
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struct napi_struct *napi;
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} ____cacheline_aligned_in_smp;
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/*
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* RX queue sysfs structures and functions.
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*/
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struct rx_queue_attribute {
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struct attribute attr;
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ssize_t (*show)(struct netdev_rx_queue *queue, char *buf);
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ssize_t (*store)(struct netdev_rx_queue *queue,
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const char *buf, size_t len);
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};
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static inline struct netdev_rx_queue *
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__netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
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{
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return dev->_rx + rxq;
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}
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#ifdef CONFIG_SYSFS
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static inline unsigned int
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get_netdev_rx_queue_index(struct netdev_rx_queue *queue)
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{
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struct net_device *dev = queue->dev;
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int index = queue - dev->_rx;
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BUG_ON(index >= dev->num_rx_queues);
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return index;
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}
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#endif
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int netdev_rx_queue_restart(struct net_device *dev, unsigned int rxq);
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#endif
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