drivers/net/ethernet/netronome/nfp/nfp_net_xsk.h

File Facts

System

Linux kernel

Corpus path

drivers/net/ethernet/netronome/nfp/nfp_net_xsk.h

Extension

.h

Size

1266 bytes

Lines

42

Domain

Driver Families

Bucket

drivers/net

Inferred role

Driver Families: implementation source

Status

source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• net/xdp_sock_drv.h

Detected Declarations

• function nfp_net_has_xsk_pool_slow
• function nfp_net_rx_space
• function nfp_net_tx_space

Annotated Snippet

#ifndef _NFP_XSK_H_
#define _NFP_XSK_H_

#include <net/xdp_sock_drv.h>

#define NFP_NET_XSK_TX_BATCH 16		/* XSK TX transmission batch size. */

static inline bool nfp_net_has_xsk_pool_slow(struct nfp_net_dp *dp,
					     unsigned int qid)
{
	return dp->xdp_prog && dp->xsk_pools[qid];
}

static inline int nfp_net_rx_space(struct nfp_net_rx_ring *rx_ring)
{
	return rx_ring->cnt - rx_ring->wr_p + rx_ring->rd_p - 1;
}

static inline int nfp_net_tx_space(struct nfp_net_tx_ring *tx_ring)
{
	return tx_ring->cnt - tx_ring->wr_p + tx_ring->rd_p - 1;
}

void nfp_net_xsk_rx_unstash(struct nfp_net_xsk_rx_buf *rxbuf);
void nfp_net_xsk_rx_free(struct nfp_net_xsk_rx_buf *rxbuf);
void nfp_net_xsk_rx_drop(struct nfp_net_r_vector *r_vec,
			 struct nfp_net_xsk_rx_buf *xrxbuf);
int nfp_net_xsk_setup_pool(struct net_device *netdev, struct xsk_buff_pool *pool,
			   u16 queue_id);

void nfp_net_xsk_rx_bufs_free(struct nfp_net_rx_ring *rx_ring);

void nfp_net_xsk_rx_ring_fill_freelist(struct nfp_net_rx_ring *rx_ring);

int nfp_net_xsk_wakeup(struct net_device *netdev, u32 queue_id, u32 flags);

#endif /* _NFP_XSK_H_ */

Annotation

• Immediate include surface: `net/xdp_sock_drv.h`.
• Detected declarations: `function nfp_net_has_xsk_pool_slow`, `function nfp_net_rx_space`, `function nfp_net_tx_space`.
• Atlas domain: Driver Families / drivers/net.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.