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