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frontend/stream: Update to LiteXModule and fix UDPTX packet send condition.

This commit is contained in:
Florent Kermarrec 2023-06-14 10:08:04 +02:00
parent 381ed30583
commit 9d22266233
1 changed files with 22 additions and 14 deletions
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34
liteeth/frontend/stream.py
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@ -1,14 +1,16 @@
# #
# This file is part of LiteEth. # This file is part of LiteEth.
# #
# Copyright (c) 2015-2021 Florent Kermarrec <florent@enjoy-digital.fr> # Copyright (c) 2015-2023 Florent Kermarrec <florent@enjoy-digital.fr>
# SPDX-License-Identifier: BSD-2-Clause # SPDX-License-Identifier: BSD-2-Clause
from litex.gen import *
from liteeth.common import * from liteeth.common import *
# Stream to UDP TX ----------------------------------------------------------------------------------- # Stream to UDP TX -----------------------------------------------------------------------------------
class LiteEthStream2UDPTX(Module): class LiteEthStream2UDPTX(LiteXModule):
def __init__(self, ip_address, udp_port, data_width=8, fifo_depth=None): def __init__(self, ip_address, udp_port, data_width=8, fifo_depth=None):
self.sink = sink = stream.Endpoint(eth_tty_tx_description(data_width)) self.sink = sink = stream.Endpoint(eth_tty_tx_description(data_width))
self.source = source = stream.Endpoint(eth_udp_user_description(data_width)) self.source = source = stream.Endpoint(eth_udp_user_description(data_width))
@ -30,17 +32,23 @@ class LiteEthStream2UDPTX(Module):
level = Signal(max=fifo_depth+1) level = Signal(max=fifo_depth+1)
counter = Signal(max=fifo_depth+1) counter = Signal(max=fifo_depth+1)
self.submodules.fifo = fifo = stream.SyncFIFO([("data", data_width)], fifo_depth, buffered=True) self.fifo = fifo = stream.SyncFIFO([("data", data_width)], fifo_depth, buffered=True)
self.comb += sink.connect(fifo.sink) self.comb += sink.connect(fifo.sink)
self.submodules.fsm = fsm = FSM(reset_state="IDLE") self.fsm = fsm = FSM(reset_state="IDLE")
fsm.act("IDLE", fsm.act("IDLE",
# Send FIFO contents when we have a full-packet or when FIFO is full.
If((fifo.source.valid & fifo.source.last) | ~fifo.sink.ready,
NextValue(level, fifo.level),
NextValue(counter, 0), NextValue(counter, 0),
# Send FIFO contenst when:
# - We have a full packet:
If(fifo.sink.valid & fifo.sink.ready & fifo.sink.last,
NextValue(level, fifo.level + 1), # +1 for level latency.
NextState("SEND") NextState("SEND")
) ),
# - Or when FIFO is full.
If(~fifo.sink.ready,
NextValue(level, fifo_depth),
NextState("SEND")
),
) )
fsm.act("SEND", fsm.act("SEND",
source.valid.eq(1), source.valid.eq(1),
@ -62,7 +70,7 @@ class LiteEthStream2UDPTX(Module):
# UDP to Stream RX --------------------------------------------------------------------------------- # UDP to Stream RX ---------------------------------------------------------------------------------
class LiteEthUDP2StreamRX(Module): class LiteEthUDP2StreamRX(LiteXModule):
def __init__(self, ip_address=None, udp_port=None, data_width=8, fifo_depth=None, with_broadcast=True): def __init__(self, ip_address=None, udp_port=None, data_width=8, fifo_depth=None, with_broadcast=True):
self.sink = sink = stream.Endpoint(eth_udp_user_description(data_width)) self.sink = sink = stream.Endpoint(eth_udp_user_description(data_width))
self.source = source = stream.Endpoint(eth_tty_rx_description(data_width)) self.source = source = stream.Endpoint(eth_tty_rx_description(data_width))
@ -88,7 +96,7 @@ class LiteEthUDP2StreamRX(Module):
sink.ready.eq(source.ready | ~valid) sink.ready.eq(source.ready | ~valid)
] ]
else: else:
self.submodules.fifo = fifo = stream.SyncFIFO( self.fifo = fifo = stream.SyncFIFO(
layout = [("data", data_width), ("error", 1)], layout = [("data", data_width), ("error", 1)],
depth = fifo_depth, depth = fifo_depth,
buffered = True, buffered = True,
@ -102,10 +110,10 @@ class LiteEthUDP2StreamRX(Module):
# UDP Streamer ------------------------------------------------------------------------------------- # UDP Streamer -------------------------------------------------------------------------------------
class LiteEthUDPStreamer(Module): class LiteEthUDPStreamer(LiteXModule):
def __init__(self, udp, ip_address, udp_port, data_width=8, rx_fifo_depth=64, tx_fifo_depth=64, with_broadcast=True, cd="sys"): def __init__(self, udp, ip_address, udp_port, data_width=8, rx_fifo_depth=64, tx_fifo_depth=64, with_broadcast=True, cd="sys"):
self.submodules.tx = tx = LiteEthStream2UDPTX(ip_address, udp_port, data_width, tx_fifo_depth) self.tx = tx = LiteEthStream2UDPTX(ip_address, udp_port, data_width, tx_fifo_depth)
self.submodules.rx = rx = LiteEthUDP2StreamRX(ip_address, udp_port, data_width, rx_fifo_depth, with_broadcast) self.rx = rx = LiteEthUDP2StreamRX(ip_address, udp_port, data_width, rx_fifo_depth, with_broadcast)
udp_port = udp.crossbar.get_port(udp_port, dw=data_width, cd=cd) udp_port = udp.crossbar.get_port(udp_port, dw=data_width, cd=cd)
self.comb += [ self.comb += [
tx.source.connect(udp_port.sink), tx.source.connect(udp_port.sink),