130 lines
3.9 KiB
Python
130 lines
3.9 KiB
Python
from liteeth.common import *
|
|
from liteeth.generic import *
|
|
from liteeth.generic.depacketizer import LiteEthDepacketizer
|
|
from liteeth.generic.packetizer import LiteEthPacketizer
|
|
|
|
class LiteEthEtherbonePacketPacketizer(LiteEthPacketizer):
|
|
def __init__(self):
|
|
LiteEthPacketizer.__init__(self,
|
|
eth_etherbone_packet_description(32),
|
|
eth_udp_user_description(32),
|
|
etherbone_packet_header,
|
|
etherbone_packet_header_len)
|
|
|
|
class LiteEthEtherbonePacketTX(Module):
|
|
def __init__(self, udp_port):
|
|
self.sink = sink = Sink(eth_etherbone_packet_user_description(32))
|
|
self.source = source = Source(eth_udp_user_description(32))
|
|
###
|
|
self.submodules.packetizer = packetizer = LiteEthEtherbonePacketPacketizer()
|
|
self.comb += [
|
|
packetizer.sink.stb.eq(sink.stb),
|
|
packetizer.sink.sop.eq(sink.sop),
|
|
packetizer.sink.eop.eq(sink.eop),
|
|
sink.ack.eq(packetizer.sink.ack),
|
|
|
|
packetizer.sink.magic.eq(etherbone_magic),
|
|
packetizer.sink.port_size.eq(32//8),
|
|
packetizer.sink.addr_size.eq(32//8),
|
|
packetizer.sink.pf.eq(sink.pf),
|
|
packetizer.sink.pr.eq(sink.pr),
|
|
packetizer.sink.nr.eq(sink.nr),
|
|
packetizer.sink.version.eq(etherbone_version),
|
|
|
|
packetizer.sink.data.eq(sink.data)
|
|
]
|
|
self.submodules.fsm = fsm = FSM(reset_state="IDLE")
|
|
fsm.act("IDLE",
|
|
packetizer.source.ack.eq(1),
|
|
If(packetizer.source.stb & packetizer.source.sop,
|
|
packetizer.source.ack.eq(0),
|
|
NextState("SEND")
|
|
)
|
|
)
|
|
fsm.act("SEND",
|
|
Record.connect(packetizer.source, source),
|
|
source.src_port.eq(udp_port),
|
|
source.dst_port.eq(udp_port),
|
|
source.ip_address.eq(sink.ip_address),
|
|
source.length.eq(sink.length + etherbone_packet_header_len),
|
|
If(source.stb & source.eop & source.ack,
|
|
NextState("IDLE")
|
|
)
|
|
)
|
|
|
|
class LiteEthEtherbonePacketDepacketizer(LiteEthDepacketizer):
|
|
def __init__(self):
|
|
LiteEthDepacketizer.__init__(self,
|
|
eth_udp_user_description(32),
|
|
eth_etherbone_packet_description(32),
|
|
etherbone_packet_header,
|
|
etherbone_packet_header_len)
|
|
|
|
class LiteEthEtherbonePacketRX(Module):
|
|
def __init__(self):
|
|
self.sink = sink = Sink(eth_udp_user_description(32))
|
|
self.source = source = Source(eth_etherbone_packet_user_description(32))
|
|
###
|
|
self.submodules.depacketizer = depacketizer = LiteEthEtherbonePacketDepacketizer()
|
|
self.comb += Record.connect(sink, depacketizer.sink)
|
|
|
|
self.submodules.fsm = fsm = FSM(reset_state="IDLE")
|
|
fsm.act("IDLE",
|
|
depacketizer.source.ack.eq(1),
|
|
If(depacketizer.source.stb & depacketizer.source.sop,
|
|
depacketizer.source.ack.eq(0),
|
|
NextState("CHECK")
|
|
)
|
|
)
|
|
valid = Signal()
|
|
self.sync += valid.eq(
|
|
depacketizer.source.stb &
|
|
(depacketizer.source.magic == etherbone_magic)
|
|
)
|
|
fsm.act("CHECK",
|
|
If(valid,
|
|
NextState("PRESENT")
|
|
).Else(
|
|
NextState("DROP")
|
|
)
|
|
)
|
|
self.comb += [
|
|
source.sop.eq(depacketizer.source.sop),
|
|
source.eop.eq(depacketizer.source.eop),
|
|
|
|
source.pf.eq(depacketizer.source.pf),
|
|
source.pr.eq(depacketizer.source.pr),
|
|
source.nr.eq(depacketizer.source.nr),
|
|
|
|
source.data.eq(depacketizer.source.data),
|
|
|
|
source.src_port.eq(sink.src_port),
|
|
source.dst_port.eq(sink.dst_port),
|
|
source.ip_address.eq(sink.ip_address),
|
|
source.length.eq(sink.length - etherbone_packet_header_len)
|
|
]
|
|
fsm.act("PRESENT",
|
|
source.stb.eq(depacketizer.source.stb),
|
|
depacketizer.source.ack.eq(source.ack),
|
|
If(source.stb & source.eop & source.ack,
|
|
NextState("IDLE")
|
|
)
|
|
)
|
|
fsm.act("DROP",
|
|
depacketizer.source.ack.eq(1),
|
|
If(depacketizer.source.stb & depacketizer.source.eop & depacketizer.source.ack,
|
|
NextState("IDLE")
|
|
)
|
|
)
|
|
|
|
class LiteEthEtherbonePacket(Module):
|
|
def __init__(self, udp, udp_port):
|
|
self.submodules.tx = tx = LiteEthEtherbonePacketTX(udp_port)
|
|
self.submodules.rx = rx = LiteEthEtherbonePacketRX()
|
|
udp_port = udp.crossbar.get_port(udp_port, dw=32)
|
|
self.comb += [
|
|
Record.connect(tx.source, udp_port.sink),
|
|
Record.connect(udp_port.source, rx.sink)
|
|
]
|
|
self.sink, self.source = self.tx.sink, self.rx.source
|