308 lines
7.7 KiB
Python
308 lines
7.7 KiB
Python
import math
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from collections import OrderedDict
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from migen.fhdl.std import *
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from migen.genlib.resetsync import AsyncResetSynchronizer
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from migen.genlib.record import *
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from migen.genlib.fsm import FSM, NextState
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from migen.genlib.misc import chooser, FlipFlop, Counter, Timeout
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from migen.flow.actor import *
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from migen.flow.plumbing import Buffer
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from migen.actorlib.structuring import Converter, Pipeline
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from migen.actorlib.fifo import SyncFIFO, AsyncFIFO
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from migen.bank.description import *
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eth_mtu = 1532
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eth_min_len = 46
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eth_interpacket_gap = 12
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eth_preamble = 0xD555555555555555
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buffer_depth = 2**log2_int(eth_mtu, need_pow2=False)
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class HField():
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def __init__(self, byte, offset, width):
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self.byte = byte
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self.offset = offset
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self.width = width
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ethernet_type_ip = 0x800
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ethernet_type_arp = 0x806
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mac_header_len = 14
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mac_header = {
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"target_mac": HField(0, 0, 48),
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"sender_mac": HField(6, 0, 48),
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"ethernet_type": HField(12, 0, 16)
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}
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arp_hwtype_ethernet = 0x0001
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arp_proto_ip = 0x0800
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arp_opcode_request = 0x0001
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arp_opcode_reply = 0x0002
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arp_header_len = 28
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arp_header = {
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"hwtype": HField(0, 0, 16),
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"proto": HField(2, 0, 16),
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"hwsize": HField(4, 0, 8),
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"protosize": HField(5, 0, 8),
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"opcode": HField(6, 0, 16),
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"sender_mac": HField(8, 0, 48),
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"sender_ip": HField(14, 0, 32),
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"target_mac": HField(18, 0, 48),
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"target_ip": HField(24, 0, 32)
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}
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ipv4_header_len = 20
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ipv4_header = {
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"ihl": HField(0, 0, 4),
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"version": HField(0, 4, 4),
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"total_length": HField(2, 0, 16),
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"identification": HField(4, 0, 16),
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"ttl": HField(8, 0, 8),
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"protocol": HField(9, 0, 8),
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"checksum": HField(10, 0, 16),
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"sender_ip": HField(12, 0, 32),
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"target_ip": HField(16, 0, 32)
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}
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icmp_header_len = 8
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icmp_header = {
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"msgtype": HField(0, 0, 8),
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"code": HField(1, 0, 8),
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"checksum": HField(2, 0, 16),
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"quench": HField(4, 0, 32)
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}
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icmp_protocol = 0x01
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udp_header_len = 8
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udp_header = {
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"src_port": HField(0, 0, 16),
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"dst_port": HField(2, 0, 16),
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"length": HField(4, 0, 16),
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"checksum": HField(6, 0, 16)
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}
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udp_protocol = 0x11
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etherbone_magic = 0x4e6f
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etherbone_version = 1
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etherbone_packet_header_len = 8
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etherbone_packet_header = {
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"magic": HField(0, 0, 16),
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"version": HField(2, 4, 4),
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"nr": HField(2, 2, 1),
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"pr": HField(2, 1, 1),
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"pf": HField(2, 0, 1),
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"addr_size": HField(3, 4, 4),
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"port_size": HField(3, 0, 4)
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}
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etherbone_record_header_len = 4
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etherbone_record_header = {
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"bca": HField(0, 0, 1),
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"rca": HField(0, 1, 1),
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"rff": HField(0, 2, 1),
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"cyc": HField(0, 4, 1),
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"wca": HField(0, 5, 1),
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"wff": HField(0, 6, 1),
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"byte_enable": HField(1, 0, 8),
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"wcount": HField(2, 0, 8),
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"rcount": HField(3, 0, 8)
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}
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def reverse_bytes(v):
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n = math.ceil(flen(v)/8)
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r = []
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for i in reversed(range(n)):
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r.append(v[i*8:min((i+1)*8, flen(v))])
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return Cat(iter(r))
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# layouts
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def _layout_from_header(header):
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_layout = []
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for k, v in sorted(header.items()):
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_layout.append((k, v.width))
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return _layout
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def _remove_from_layout(layout, *args):
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r = []
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for f in layout:
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remove = False
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for arg in args:
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if f[0] == arg:
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remove = True
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if not remove:
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r.append(f)
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return r
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def eth_phy_description(dw):
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payload_layout = [
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("data", dw),
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("last_be", dw//8),
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("error", dw//8)
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]
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return EndpointDescription(payload_layout, packetized=True)
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def eth_mac_description(dw):
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payload_layout = _layout_from_header(mac_header) + [
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("data", dw),
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("last_be", dw//8),
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("error", dw//8)
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]
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return EndpointDescription(payload_layout, packetized=True)
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def eth_arp_description(dw):
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param_layout = _layout_from_header(arp_header)
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payload_layout = [
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("data", dw),
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("error", dw//8)
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]
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return EndpointDescription(payload_layout, param_layout, packetized=True)
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arp_table_request_layout = [
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("ip_address", 32)
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]
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arp_table_response_layout = [
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("failed", 1),
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("mac_address", 48)
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]
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def eth_ipv4_description(dw):
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param_layout = _layout_from_header(ipv4_header)
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payload_layout = [
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("data", dw),
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("error", dw//8)
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]
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return EndpointDescription(payload_layout, param_layout, packetized=True)
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def eth_ipv4_user_description(dw):
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param_layout = [
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("length", 16),
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("protocol", 8),
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("ip_address", 32)
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]
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payload_layout = [
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("data", dw),
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("error", dw//8)
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]
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return EndpointDescription(payload_layout, param_layout, packetized=True)
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def convert_ip(s):
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ip = 0
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for e in s.split("."):
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ip = ip << 8
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ip += int(e)
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return ip
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def eth_icmp_description(dw):
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param_layout = _layout_from_header(icmp_header)
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payload_layout = [
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("data", dw),
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("error", dw//8)
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]
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return EndpointDescription(payload_layout, param_layout, packetized=True)
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def eth_icmp_user_description(dw):
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param_layout = _layout_from_header(icmp_header) + [
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("ip_address", 32),
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("length", 16)
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]
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payload_layout = [
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("data", dw),
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("error", dw//8)
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]
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return EndpointDescription(payload_layout, param_layout, packetized=True)
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def eth_udp_description(dw):
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param_layout = _layout_from_header(udp_header)
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payload_layout = [
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("data", dw),
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("error", dw//8)
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]
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return EndpointDescription(payload_layout, param_layout, packetized=True)
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def eth_udp_user_description(dw):
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param_layout = [
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("src_port", 16),
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("dst_port", 16),
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("ip_address", 32),
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("length", 16)
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]
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payload_layout = [
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("data", dw),
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("error", dw//8)
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]
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return EndpointDescription(payload_layout, param_layout, packetized=True)
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def eth_etherbone_packet_description(dw):
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param_layout = _layout_from_header(etherbone_packet_header)
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payload_layout = [
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("data", dw),
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("error", dw//8)
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]
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return EndpointDescription(payload_layout, param_layout, packetized=True)
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def eth_etherbone_packet_user_description(dw):
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param_layout = _layout_from_header(etherbone_packet_header)
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param_layout = _remove_from_layout(param_layout,
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"magic",
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"portsize",
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"addrsize",
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"version")
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param_layout += eth_udp_user_description(dw).param_layout
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payload_layout = [
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("data", dw),
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("error", dw//8)
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]
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return EndpointDescription(payload_layout, param_layout, packetized=True)
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def eth_etherbone_record_description(dw):
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param_layout = _layout_from_header(etherbone_record_header)
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payload_layout = [
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("data", dw),
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("error", dw//8)
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]
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return EndpointDescription(payload_layout, param_layout, packetized=True)
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def eth_etherbone_mmap_description(dw):
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param_layout = [
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("we", 1),
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("count", 8),
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("base_addr", 32),
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("be", dw//8)
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]
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payload_layout = [
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("addr", 32),
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("data", dw)
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]
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return EndpointDescription(payload_layout, param_layout, packetized=True)
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def eth_tty_description(dw):
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payload_layout = [("data", dw)]
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return EndpointDescription(payload_layout, packetized=False)
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