rte_eth_rxseg_split Struct Reference

#include <rte_ethdev.h>

Data Fields
struct rte_mempool *	mp
uint16_t	length
uint16_t	offset
uint32_t	reserved

Detailed Description

Warning

EXPERIMENTAL: this structure may change without prior notice.

A structure used to configure an Rx packet segment to split.

If RTE_ETH_RX_OFFLOAD_BUFFER_SPLIT flag is set in offloads field, the PMD will split the received packets into multiple segments according to the specification in the description array:

• The first network buffer will be allocated from the memory pool, specified in the first array element, the second buffer, from the pool in the second element, and so on.
• The offsets from the segment description elements specify the data offset from the buffer beginning except the first mbuf. The first segment offset is added with RTE_PKTMBUF_HEADROOM.
• The lengths in the elements define the maximal data amount being received to each segment. The receiving starts with filling up the first mbuf data buffer up to specified length. If the there are data remaining (packet is longer than buffer in the first mbuf) the following data will be pushed to the next segment up to its own length, and so on.
• If the length in the segment description element is zero the actual buffer size will be deduced from the appropriate memory pool properties.
• If there is not enough elements to describe the buffer for entire packet of maximal length the following parameters will be used for the all remaining segments:
  • pool from the last valid element
  • the buffer size from this pool
  • zero offset

Definition at line 1016 of file rte_ethdev.h.

Field Documentation

struct rte_mempool* mp

Memory pool to allocate segment from.

Definition at line 1017 of file rte_ethdev.h.

uint16_t length

Segment data length, configures split point.

Definition at line 1018 of file rte_ethdev.h.

uint16_t offset

Data offset from beginning of mbuf data buffer.

Definition at line 1019 of file rte_ethdev.h.

uint32_t reserved

Reserved field.

Definition at line 1020 of file rte_ethdev.h.

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The documentation for this struct was generated from the following file:

• lib/librte_ethdev/rte_ethdev.h