Module wire 

The words on rhdl_ubft’s streams, bit for bit as ubft_new has them.

Stream	Width	Content (LSB first)
input (from kvstore)	64	value 32, syncronizationGroup 32 (ProposedValue)
output, remoteUpdate (to kvstore)	256	bits 0..32 m, 32..64 k, rest 0
m_axis_tx_meta (to RoCE)	256 + keep/last	op 3, qpn 24, laddr 48, raddr 48, len 32
m_axis_tx_data (to RoCE)	512 + keep/last	the bytes to write, from byte 0
s_axis_tx_status (from RoCE)	512	completion status (drained)

op is 1 for an RDMA write, 0 for a read. A write whose laddr is 0 takes its bytes from m_axis_tx_data.

Structs

RdmaMeta

The RoCE stack’s request word (m_axis_tx_meta, ubft_rdma.cpp).

Constants

RDMA_READ

RDMA read.

RDMA_WRITE

RDMA write.

Functions

decision

A decision word (output, remoteUpdate): m in bits 0..32, k in 32..64.