""" Copyright (c) 2014 Alex Forencich Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. """ from myhdl import * import axis_ep from Queue import Queue import struct class EthFrame(object): def __init__(self, payload=b'', eth_dest_mac=0, eth_src_mac=0, eth_type=0): self._payload = axis_ep.AXIStreamFrame() self.eth_dest_mac = eth_dest_mac self.eth_src_mac = eth_src_mac self.eth_type = eth_type if type(payload) is dict: self.payload = axis_ep.AXIStreamFrame(payload['eth_payload']) self.eth_dest_mac = payload['eth_dest_mac'] self.eth_src_mac = payload['eth_src_mac'] self.eth_type = payload['eth_type'] if type(payload) is bytes: payload = bytearray(payload) if type(payload) is bytearray or type(payload) is axis_ep.AXIStreamFrame: self.payload = axis_ep.AXIStreamFrame(payload) if type(payload) is EthFrame: self.payload = axis_ep.AXIStreamFrame(payload.payload) self.eth_dest_mac = payload.eth_dest_mac self.eth_src_mac = payload.eth_src_mac self.eth_type = payload.eth_type @property def payload(self): return self._payload @payload.setter def payload(self, value): self._payload = axis_ep.AXIStreamFrame(value) def build_axis(self): data = b'' data += struct.pack('>Q', self.eth_dest_mac)[2:] data += struct.pack('>Q', self.eth_src_mac)[2:] data += struct.pack('>H', self.eth_type) data += self.payload.data return axis_ep.AXIStreamFrame(data) def parse_axis(self, data): data = axis_ep.AXIStreamFrame(data).data self.eth_dest_mac = struct.unpack('>Q', '\x00\x00'+data[0:6])[0] self.eth_src_mac = struct.unpack('>Q', '\x00\x00'+data[6:12])[0] self.eth_type = struct.unpack('>H', data[12:14])[0] data = data[14:] self.payload = axis_ep.AXIStreamFrame(data) def __eq__(self, other): if type(other) is EthFrame: return (self.eth_src_mac == other.eth_src_mac and self.eth_dest_mac == other.eth_dest_mac and self.eth_type == other.eth_type and self.payload == other.payload) def __repr__(self): return 'EthFrame(payload=%s, eth_dest_mac=0x%012x, eth_src_mac=0x%012x, eth_type=0x%04x)' % (repr(self.payload), self.eth_dest_mac, self.eth_src_mac, self.eth_type) def EthFrameSource(clk, rst, eth_hdr_valid=None, eth_hdr_ready=None, eth_dest_mac=None, eth_src_mac=None, eth_type=None, eth_payload_tdata=None, eth_payload_tkeep=Signal(bool(True)), eth_payload_tvalid=Signal(bool(False)), eth_payload_tready=Signal(bool(True)), eth_payload_tlast=Signal(bool(False)), eth_payload_tuser=Signal(bool(False)), fifo=None, pause=0, name=None): eth_hdr_ready_int = Signal(bool(False)) eth_hdr_valid_int = Signal(bool(False)) eth_payload_pause = Signal(bool(False)) eth_payload_fifo = Queue() eth_payload_source = axis_ep.AXIStreamSource(clk, rst, tdata=eth_payload_tdata, tkeep=eth_payload_tkeep, tvalid=eth_payload_tvalid, tready=eth_payload_tready, tlast=eth_payload_tlast, tuser=eth_payload_tuser, fifo=eth_payload_fifo, pause=eth_payload_pause) @always_comb def pause_logic(): eth_hdr_ready_int.next = eth_hdr_ready and not pause eth_hdr_valid.next = eth_hdr_valid_int and not pause eth_payload_pause.next = pause # or eth_hdr_valid_int @instance def logic(): frame = dict() while True: yield clk.posedge, rst.posedge if rst: eth_hdr_valid_int.next = False else: if eth_hdr_ready_int: eth_hdr_valid_int.next = False if (eth_payload_tlast and eth_hdr_ready_int and eth_hdr_valid) or not eth_hdr_valid_int: if not fifo.empty(): frame = fifo.get() frame = EthFrame(frame) eth_dest_mac.next = frame.eth_dest_mac eth_src_mac.next = frame.eth_src_mac eth_type.next = frame.eth_type eth_payload_fifo.put(frame.payload) if name is not None: print("[%s] Sending frame %s" % (name, repr(frame))) eth_hdr_valid_int.next = True return logic, pause_logic, eth_payload_source def EthFrameSink(clk, rst, eth_hdr_valid=None, eth_hdr_ready=None, eth_dest_mac=None, eth_src_mac=None, eth_type=None, eth_payload_tdata=None, eth_payload_tkeep=Signal(bool(True)), eth_payload_tvalid=Signal(bool(True)), eth_payload_tready=Signal(bool(True)), eth_payload_tlast=Signal(bool(True)), eth_payload_tuser=Signal(bool(False)), fifo=None, pause=0, name=None): eth_hdr_ready_int = Signal(bool(False)) eth_hdr_valid_int = Signal(bool(False)) eth_payload_pause = Signal(bool(False)) eth_payload_fifo = Queue() eth_header_fifo = Queue() eth_payload_sink = axis_ep.AXIStreamSink(clk, rst, tdata=eth_payload_tdata, tkeep=eth_payload_tkeep, tvalid=eth_payload_tvalid, tready=eth_payload_tready, tlast=eth_payload_tlast, tuser=eth_payload_tuser, fifo=eth_payload_fifo, pause=eth_payload_pause) @always_comb def pause_logic(): eth_hdr_ready.next = eth_hdr_ready_int and not pause eth_hdr_valid_int.next = eth_hdr_valid and not pause eth_payload_pause.next = pause # or eth_hdr_valid_int @instance def logic(): frame = EthFrame() while True: yield clk.posedge, rst.posedge if rst: eth_hdr_ready_int.next = False frame = EthFrame() else: eth_hdr_ready_int.next = True if eth_hdr_ready_int and eth_hdr_valid_int: frame = EthFrame() frame.eth_dest_mac = int(eth_dest_mac) frame.eth_src_mac = int(eth_src_mac) frame.eth_type = int(eth_type) eth_header_fifo.put(frame) if not eth_payload_fifo.empty() and not eth_header_fifo.empty(): frame = eth_header_fifo.get() frame.payload = eth_payload_fifo.get() fifo.put(frame) if name is not None: print("[%s] Got frame %s" % (name, repr(frame))) frame = dict() return logic, pause_logic, eth_payload_sink