include/net/netdev_queues.h

1 /* SPDX-License-Identifier: GPL-2.0 */
50  * struct netdev_stat_ops - netdev ops for fine grained stats
51  * @get_queue_stats_rx:	get stats for a given Rx queue
56  * on entry (specifically they are *not* zero-initialized). Drivers should
61  * queues are queried by the per-queue callbacks. This means that per-queue
64  * between events for currently live queues and overall device history.
66  * transferred outside of the main set of queues used by the networking stack.
68  * is issued to collect the delta, and then a series of per-queue callbacks.
78  * the @get_base_stats and subsequent per-queue calls are performed
81  * Device drivers are encouraged to reset the per-queue statistics when
82  * number of queues change. This is because the primary use case for
83  * per-queue statistics is currently to detect traffic imbalance.
91 			       struct netdev_queue_stats_rx *rx,
96  * struct netdev_queue_mgmt_ops - netdev ops for queue management
100  * @ndo_queue_mem_alloc: Allocate memory for an RX queue at the specified index.
103  * @ndo_queue_mem_free:	Free memory from an RX queue.
105  * @ndo_queue_start:	Start an RX queue with the specified memory and at the
108  * @ndo_queue_stop:	Stop the RX queue at the specified index. The stopped
131  * and waking netdev queues without full lock protection.
134  * wake attempts. The try-stop should happen from the xmit handler,
138  * The try-stop side is expected to run from the xmit handler and therefore
170 			_res = -1;					\
176  * netif_txq_maybe_stop() - locklessly stop a Tx queue, if needed
181  * @start_thrs:	minimal number of descriptors to re-enable the queue, can be
186  * return up-to-date information when evaluated!
192  *	-1 if the queue was re-enabled (raced with waking)
205  * @bytes != 0, regardless of kernel config.
218  * __netif_txq_completed_wake() - locklessly wake a Tx queue, if needed
223  * @start_thrs:	minimal number of descriptors to re-enable the queue
229  * return up-to-date information when evaluated!
235  *	-1 if the queue was left unchanged (@start_thrs not reached)
249 		_res = -1;						\