| /linux-6.15/Documentation/networking/ |
| D | napi.rst | 6 NAPI title
9 NAPI is the event handling mechanism used by the Linux networking stack.
10 The name NAPI no longer stands for anything in particular [#]_.
14 The host then schedules a NAPI instance to process the events.
15 The device may also be polled for events via NAPI without receiving
18 NAPI processing usually happens in the software interrupt context,
20 for NAPI processing.
22 All in all NAPI abstracts away from the drivers the context and configuration
28 The two most important elements of NAPI are the struct napi_struct
30 of the NAPI instance while the method is the driver-specific event
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| D | multi-pf-netdev.rst | 90 The relation between PF, irq, napi, and queue can be observed via netlink spec::
93 [{'id': 0, 'ifindex': 13, 'napi-id': 539, 'type': 'rx'},
94 {'id': 1, 'ifindex': 13, 'napi-id': 540, 'type': 'rx'},
95 {'id': 2, 'ifindex': 13, 'napi-id': 541, 'type': 'rx'},
96 {'id': 3, 'ifindex': 13, 'napi-id': 542, 'type': 'rx'},
97 {'id': 4, 'ifindex': 13, 'napi-id': 543, 'type': 'rx'},
98 {'id': 0, 'ifindex': 13, 'napi-id': 539, 'type': 'tx'},
99 {'id': 1, 'ifindex': 13, 'napi-id': 540, 'type': 'tx'},
100 {'id': 2, 'ifindex': 13, 'napi-id': 541, 'type': 'tx'},
101 {'id': 3, 'ifindex': 13, 'napi-id': 542, 'type': 'tx'},
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| /linux-6.15/io_uring/ |
| D | napi.c | 4 #include "napi.h"
37 /* napi approximating usecs, reverse busy_loop_current_time */ in net_to_ktime()
46 /* Non-NAPI IDs can be rejected. */ in __io_napi_add_id()
89 /* Non-NAPI IDs can be rejected. */ in __io_napi_del_id()
212 /* Singular lists use a different napi loop end check function and are in io_napi_blocking_busy_loop()
232 * io_napi_init() - Init napi settings
235 * Init napi settings in the io-uring context.
249 * io_napi_free() - Deallocate napi
252 * Free the napi list and the hash table in the io-uring context.
267 struct io_uring_napi *napi) in io_napi_register_napi() argument
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| /linux-6.15/net/core/ |
| D | dev.h | 190 * napi_get_defer_hard_irqs - get the NAPI's defer_hard_irqs
191 * @n: napi struct to get the defer_hard_irqs field from
193 * Return: the per-NAPI value of the defar_hard_irqs field.
201 * napi_set_defer_hard_irqs - set the defer_hard_irqs for a napi
220 struct napi_struct *napi; in netdev_set_defer_hard_irqs() local
224 list_for_each_entry(napi, &netdev->napi_list, dev_list) in netdev_set_defer_hard_irqs()
225 napi_set_defer_hard_irqs(napi, defer); in netdev_set_defer_hard_irqs()
233 * @n: napi struct to get the gro_flush_timeout from
235 * Return: the per-NAPI value of the gro_flush_timeout field.
244 * napi_set_gro_flush_timeout - set the gro_flush_timeout for a napi
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| D | gro_cells.c | 10 struct napi_struct napi; member
40 napi_schedule(&cell->napi); in gro_cells_receive()
51 static int gro_cell_poll(struct napi_struct *napi, int budget) in gro_cell_poll() argument
53 struct gro_cell *cell = container_of(napi, struct gro_cell, napi); in gro_cell_poll()
61 napi_gro_receive(napi, skb); in gro_cell_poll()
66 napi_complete_done(napi, work_done); in gro_cell_poll()
83 set_bit(NAPI_STATE_NO_BUSY_POLL, &cell->napi.state); in gro_cells_init()
85 netif_napi_add(dev, &cell->napi, gro_cell_poll); in gro_cells_init()
86 napi_enable(&cell->napi); in gro_cells_init()
116 napi_disable(&cell->napi); in gro_cells_destroy()
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| D | netdev-genl.c | 164 netdev_nl_napi_fill_one(struct sk_buff *rsp, struct napi_struct *napi, in netdev_nl_napi_fill_one() argument
173 if (!napi->dev->up) in netdev_nl_napi_fill_one()
180 if (nla_put_u32(rsp, NETDEV_A_NAPI_ID, napi->napi_id)) in netdev_nl_napi_fill_one()
183 if (nla_put_u32(rsp, NETDEV_A_NAPI_IFINDEX, napi->dev->ifindex)) in netdev_nl_napi_fill_one()
186 if (napi->irq >= 0 && nla_put_u32(rsp, NETDEV_A_NAPI_IRQ, napi->irq)) in netdev_nl_napi_fill_one()
189 if (napi->thread) { in netdev_nl_napi_fill_one()
190 pid = task_pid_nr(napi->thread); in netdev_nl_napi_fill_one()
195 napi_defer_hard_irqs = napi_get_defer_hard_irqs(napi); in netdev_nl_napi_fill_one()
200 irq_suspend_timeout = napi_get_irq_suspend_timeout(napi); in netdev_nl_napi_fill_one()
205 gro_flush_timeout = napi_get_gro_flush_timeout(napi); in netdev_nl_napi_fill_one()
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| D | dev.c | 136 #include <trace/events/napi.h>
463 * (e.g. NAPI context).
776 struct napi_struct *napi; in napi_by_id() local
778 hlist_for_each_entry_rcu(napi, &napi_hash[hash], napi_hash_node) in napi_by_id()
779 if (napi->napi_id == napi_id) in napi_by_id()
780 return napi; in napi_by_id()
789 struct napi_struct *napi; in netdev_napi_by_id() local
791 napi = napi_by_id(napi_id); in netdev_napi_by_id()
792 if (!napi) in netdev_napi_by_id()
795 if (WARN_ON_ONCE(!napi->dev)) in netdev_napi_by_id()
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| /linux-6.15/include/trace/events/ |
| D | napi.h | 3 #define TRACE_SYSTEM napi
16 TP_PROTO(struct napi_struct *napi, int work, int budget),
18 TP_ARGS(napi, work, budget),
21 __field( struct napi_struct *, napi)
22 __string( dev_name, napi->dev ? napi->dev->name : NO_DEV)
28 __entry->napi = napi;
34 TP_printk("napi poll on napi struct %p for device %s work %d budget %d",
35 __entry->napi, __get_str(dev_name),
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| /linux-6.15/drivers/net/ethernet/intel/igc/ |
| D | igc_xdp.c | 32 napi_disable(&adapter->rx_ring[i]->q_vector->napi); in igc_xdp_set_prog()
47 napi_enable(&adapter->rx_ring[i]->q_vector->napi); in igc_xdp_set_prog()
62 struct napi_struct *napi; in igc_xdp_enable_pool() local
91 /* Rx and Tx rings share the same napi context. */ in igc_xdp_enable_pool()
92 napi = &rx_ring->q_vector->napi; in igc_xdp_enable_pool()
97 napi_disable(napi); in igc_xdp_enable_pool()
104 napi_enable(napi); in igc_xdp_enable_pool()
122 struct napi_struct *napi; in igc_xdp_disable_pool() local
137 /* Rx and Tx rings share the same napi context. */ in igc_xdp_disable_pool()
138 napi = &rx_ring->q_vector->napi; in igc_xdp_disable_pool()
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| /linux-6.15/drivers/infiniband/hw/hfi1/ |
| D | ipoib_rx.c | 22 static struct sk_buff *prepare_frag_skb(struct napi_struct *napi, int size) in prepare_frag_skb() argument
33 return napi_alloc_skb(napi, size); in prepare_frag_skb()
49 struct napi_struct *napi = &rxq->napi; in hfi1_ipoib_prepare_skb() local
55 * napi cache. Otherwise we will try to use napi frag cache. in hfi1_ipoib_prepare_skb()
58 skb = napi_alloc_skb(napi, skb_size); in hfi1_ipoib_prepare_skb()
60 skb = prepare_frag_skb(napi, skb_size); in hfi1_ipoib_prepare_skb()
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| D | netdev_rx.c | 211 rxq->rcd->napi = &rxq->napi; in hfi1_netdev_rxq_init()
212 dd_dev_info(dd, "Setting rcv queue %d napi to context %d\n", in hfi1_netdev_rxq_init()
215 * Disable BUSY_POLL on this NAPI as this is not supported in hfi1_netdev_rxq_init()
218 set_bit(NAPI_STATE_NO_BUSY_POLL, &rxq->napi.state); in hfi1_netdev_rxq_init()
219 netif_napi_add(dev, &rxq->napi, hfi1_netdev_rx_napi); in hfi1_netdev_rxq_init()
252 netif_napi_del(&rxq->napi); in hfi1_netdev_rxq_deinit()
272 napi_enable(&rxq->napi); in enable_queues()
291 /* wait for napi if it was scheduled */ in disable_queues()
295 napi_synchronize(&rxq->napi); in disable_queues()
296 napi_disable(&rxq->napi); in disable_queues()
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| D | netdev.h | 18 * @napi: napi object
23 struct napi_struct napi; member
47 * When 0 NAPI will be disabled.
58 /* count of enabled napi polls */
103 int hfi1_netdev_rx_napi(struct napi_struct *napi, int budget);
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| /linux-6.15/Documentation/netlink/specs/ |
| D | netdev.yaml | 39 support in the driver napi callback.
146 name: napi-id
147 doc: Id of NAPI using this Page Pool instance.
241 name: napi
245 doc: ifindex of the netdevice to which NAPI instance belongs.
251 doc: ID of the NAPI instance.
255 doc: The associated interrupt vector number for the napi
259 doc: PID of the napi thread, if NAPI is configured to operate in
260 threaded mode. If NAPI is not in threaded mode (i.e. uses normal
272 doc: The timeout, in nanoseconds, of when to trigger the NAPI watchdog
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| /linux-6.15/include/linux/ |
| D | netpoll.h | 79 static inline void *netpoll_poll_lock(struct napi_struct *napi) in netpoll_poll_lock() argument
81 struct net_device *dev = napi->dev; in netpoll_poll_lock()
86 while (cmpxchg(&napi->poll_owner, -1, owner) != -1) in netpoll_poll_lock()
89 return napi; in netpoll_poll_lock()
96 struct napi_struct *napi = have; in netpoll_poll_unlock() local
98 if (napi) in netpoll_poll_unlock()
99 smp_store_release(&napi->poll_owner, -1); in netpoll_poll_unlock()
108 static inline void *netpoll_poll_lock(struct napi_struct *napi) in netpoll_poll_lock() argument
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| /linux-6.15/drivers/net/netdevsim/ |
| D | netdev.c | 366 static int nsim_poll(struct napi_struct *napi, int budget) in nsim_poll() argument
368 struct nsim_rq *rq = container_of(napi, struct nsim_rq, napi); in nsim_poll()
372 napi_complete(napi); in nsim_poll()
377 static int nsim_create_page_pool(struct page_pool **p, struct napi_struct *napi) in nsim_create_page_pool() argument
383 .dev = &napi->dev->dev, in nsim_create_page_pool()
384 .napi = napi, in nsim_create_page_pool()
386 .netdev = napi->dev, in nsim_create_page_pool()
407 netif_napi_add_config_locked(dev, &rq->napi, nsim_poll, i); in nsim_init_napi()
413 err = nsim_create_page_pool(&rq->page_pool, &rq->napi); in nsim_init_napi()
427 __netif_napi_del_locked(&ns->rq[i]->napi); in nsim_init_napi()
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| /linux-6.15/drivers/net/wireless/ath/wil6210/ |
| D | netdev.c | 91 static int wil6210_netdev_poll_rx(struct napi_struct *napi, int budget) in wil6210_netdev_poll_rx() argument
93 struct wil6210_priv *wil = container_of(napi, struct wil6210_priv, in wil6210_netdev_poll_rx()
102 napi_complete_done(napi, done); in wil6210_netdev_poll_rx()
104 wil_dbg_txrx(wil, "NAPI RX complete\n"); in wil6210_netdev_poll_rx()
107 wil_dbg_txrx(wil, "NAPI RX poll(%d) done %d\n", budget, done); in wil6210_netdev_poll_rx()
112 static int wil6210_netdev_poll_rx_edma(struct napi_struct *napi, int budget) in wil6210_netdev_poll_rx_edma() argument
114 struct wil6210_priv *wil = container_of(napi, struct wil6210_priv, in wil6210_netdev_poll_rx_edma()
123 napi_complete_done(napi, done); in wil6210_netdev_poll_rx_edma()
125 wil_dbg_txrx(wil, "NAPI RX complete\n"); in wil6210_netdev_poll_rx_edma()
128 wil_dbg_txrx(wil, "NAPI RX poll(%d) done %d\n", budget, done); in wil6210_netdev_poll_rx_edma()
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| /linux-6.15/drivers/net/ethernet/synopsys/ |
| D | dwc-xlgmac-net.c | 283 * enabled before using the private data napi structure. in xlgmac_isr()
290 if (napi_schedule_prep(&pdata->napi)) { in xlgmac_isr()
296 __napi_schedule_irqoff(&pdata->napi); in xlgmac_isr()
348 * channel napi structure and not the private data napi structure in xlgmac_dma_isr()
350 if (napi_schedule_prep(&channel->napi)) { in xlgmac_dma_isr()
355 __napi_schedule_irqoff(&channel->napi); in xlgmac_dma_isr()
365 struct napi_struct *napi; in xlgmac_tx_timer() local
367 napi = (pdata->per_channel_irq) ? &channel->napi : &pdata->napi; in xlgmac_tx_timer()
369 if (napi_schedule_prep(napi)) { in xlgmac_tx_timer()
378 __napi_schedule(napi); in xlgmac_tx_timer()
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| /linux-6.15/drivers/net/ethernet/ |
| D | lantiq_xrx200.c | 64 struct napi_struct napi; member
151 napi_enable(&priv->chan_tx.napi); in xrx200_open()
155 napi_enable(&priv->chan_rx.napi); in xrx200_open()
178 napi_disable(&priv->chan_rx.napi); in xrx200_close()
181 napi_disable(&priv->chan_tx.napi); in xrx200_close()
283 static int xrx200_poll_rx(struct napi_struct *napi, int budget) in xrx200_poll_rx() argument
285 struct xrx200_chan *ch = container_of(napi, in xrx200_poll_rx()
286 struct xrx200_chan, napi); in xrx200_poll_rx()
306 if (napi_complete_done(&ch->napi, rx)) in xrx200_poll_rx()
313 static int xrx200_tx_housekeeping(struct napi_struct *napi, int budget) in xrx200_tx_housekeeping() argument
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| /linux-6.15/drivers/net/ethernet/aquantia/atlantic/ |
| D | aq_vec.c | 21 struct napi_struct napi; member
28 static int aq_vec_poll(struct napi_struct *napi, int budget) in aq_vec_poll() argument
30 struct aq_vec_s *self = container_of(napi, struct aq_vec_s, napi); in aq_vec_poll()
68 napi, in aq_vec_poll()
93 napi_complete_done(napi, work_done); in aq_vec_poll()
122 netif_napi_add(aq_nic_get_ndev(aq_nic), &self->napi, aq_vec_poll); in aq_vec_alloc()
151 self->napi.napi_id) < 0) { in aq_vec_ring_alloc()
245 napi_enable(&self->napi); in aq_vec_start()
265 napi_disable(&self->napi); in aq_vec_stop()
290 netif_napi_del(&self->napi); in aq_vec_free()
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| /linux-6.15/drivers/net/ethernet/mellanox/mlx4/ |
| D | en_cq.c | 152 netif_napi_add_tx(cq->dev, &cq->napi, mlx4_en_poll_tx_cq); in mlx4_en_activate_cq()
153 netif_napi_set_irq(&cq->napi, irq); in mlx4_en_activate_cq()
154 napi_enable(&cq->napi); in mlx4_en_activate_cq()
155 netif_queue_set_napi(cq->dev, cq_idx, NETDEV_QUEUE_TYPE_TX, &cq->napi); in mlx4_en_activate_cq()
159 netif_napi_add_config(cq->dev, &cq->napi, mlx4_en_poll_rx_cq, in mlx4_en_activate_cq()
161 netif_napi_set_irq(&cq->napi, irq); in mlx4_en_activate_cq()
162 napi_enable(&cq->napi); in mlx4_en_activate_cq()
163 netif_queue_set_napi(cq->dev, cq_idx, NETDEV_QUEUE_TYPE_RX, &cq->napi); in mlx4_en_activate_cq()
166 /* nothing regarding napi, it's shared with rx ring */ in mlx4_en_activate_cq()
207 napi_disable(&cq->napi); in mlx4_en_deactivate_cq()
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| /linux-6.15/drivers/net/ethernet/google/gve/ |
| D | gve_utils.c | 67 struct sk_buff *gve_rx_copy_data(struct net_device *dev, struct napi_struct *napi, in gve_rx_copy_data() argument
72 skb = napi_alloc_skb(napi, len); in gve_rx_copy_data()
83 struct sk_buff *gve_rx_copy(struct net_device *dev, struct napi_struct *napi, in gve_rx_copy() argument
89 return gve_rx_copy_data(dev, napi, va, len); in gve_rx_copy()
113 netif_napi_add_locked(priv->dev, &block->napi, gve_poll); in gve_add_napi()
114 netif_napi_set_irq_locked(&block->napi, block->irq); in gve_add_napi()
121 netif_napi_del_locked(&block->napi); in gve_remove_napi()
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| /linux-6.15/drivers/net/ethernet/mellanox/mlx5/core/en/ |
| D | trap.c | 8 static int mlx5e_trap_napi_poll(struct napi_struct *napi, int budget) in mlx5e_trap_napi_poll() argument
10 struct mlx5e_trap *trap_ctx = container_of(napi, struct mlx5e_trap, napi); in mlx5e_trap_napi_poll()
29 if (unlikely(!napi_complete_done(napi, work_done))) in mlx5e_trap_napi_poll()
77 ccp.napi = &t->napi; in mlx5e_open_trap_rq()
152 netif_napi_add(netdev, &t->napi, mlx5e_trap_napi_poll); in mlx5e_open_trap()
167 netif_napi_del(&t->napi); in mlx5e_open_trap()
176 netif_napi_del(&trap->napi); in mlx5e_close_trap()
182 napi_enable(&trap->napi); in mlx5e_activate_trap()
184 mlx5e_trigger_napi_sched(&trap->napi); in mlx5e_activate_trap()
192 napi_disable(&trap->napi); in mlx5e_deactivate_trap()
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| /linux-6.15/drivers/net/caif/ |
| D | caif_virtio.c | 30 /* NAPI schedule quota */
41 /* struct cfv_napi_contxt - NAPI context info
54 * @rx_napi_complete: Number of NAPI completions (RX)
84 * @napi: Napi context used in cfv_rx_poll()
111 struct napi_struct napi; member
250 static int cfv_rx_poll(struct napi_struct *napi, int quota) in cfv_rx_poll() argument
252 struct cfv_info *cfv = container_of(napi, struct cfv_info, napi); in cfv_rx_poll()
319 napi_complete(napi); in cfv_rx_poll()
321 napi_schedule_prep(napi)) { in cfv_rx_poll()
323 __napi_schedule(napi); in cfv_rx_poll()
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| /linux-6.15/drivers/net/ethernet/meta/fbnic/ |
| D | fbnic_txrx.c | 583 txq = txring_txq(nv->napi.dev, ring); in fbnic_clean_twq0()
626 netdev_err(nv->napi.dev, in fbnic_clean_tsq()
638 fbn = netdev_priv(nv->napi.dev); in fbnic_clean_tsq()
993 skb->protocol = eth_type_trans(skb, nv->napi.dev); in fbnic_build_skb()
1018 fbn = netdev_priv(nv->napi.dev); in fbnic_rx_tstamp()
1031 struct net_device *netdev = nv->napi.dev; in fbnic_populate_skb_fields()
1109 napi_gro_receive(&nv->napi, skb); in fbnic_clean_rcq()
1180 static int fbnic_poll(struct napi_struct *napi, int budget) in fbnic_poll() argument
1182 struct fbnic_napi_vector *nv = container_of(napi, in fbnic_poll()
1184 napi); in fbnic_poll()
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| /linux-6.15/drivers/net/ethernet/qlogic/qlcnic/ |
| D | qlcnic_io.c | 959 static int qlcnic_poll(struct napi_struct *napi, int budget) in qlcnic_poll() argument
966 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); in qlcnic_poll()
979 napi_complete_done(&sds_ring->napi, work_done); in qlcnic_poll()
989 static int qlcnic_tx_poll(struct napi_struct *napi, int budget) in qlcnic_tx_poll() argument
995 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi); in qlcnic_tx_poll()
1000 napi_complete(&tx_ring->napi); in qlcnic_tx_poll()
1011 static int qlcnic_rx_poll(struct napi_struct *napi, int budget) in qlcnic_rx_poll() argument
1017 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi); in qlcnic_rx_poll()
1023 napi_complete_done(&sds_ring->napi, work_done); in qlcnic_rx_poll()
1248 napi_gro_receive(&sds_ring->napi, skb); in qlcnic_process_rcv()
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