EnetCpdma_SGList Struct Reference

Detailed Description

Transmit packet scatter list info.

This structure contains info on the scatter list used for transmitting packets that are split into list of fragments. Using a scatter list allows application to transmit packet that are not a single continuous buffer but a list of scatter fragments chained together. Support for scatter list is needed for supporting zero copy in network stacks protocols like UDP

Data Fields
uint32_t	numScatterSegments
EnetCpdma_SGListEntry	list [ENET_CPDMA_CPSW_MAX_SG_LIST]

Field Documentation

numScatterSegments

uint32_t EnetCpdma_SGList::numScatterSegments

Number of valid scatter segments in the packet to be transmitted If packet is made of a single continuous buffer (no scatter list case) then numScatterSegments == 1

list

EnetCpdma_SGListEntry EnetCpdma_SGList::list[ENET_CPDMA_CPSW_MAX_SG_LIST]

Array of scatterList having info on each individual scatter segement