Andrew Moch
05eb1bc2f1
The rnfoc/xport section is refactored in System Verilog to allow the
following improvements
(1) CPU_W - Sets the size of the c2e and e2c pipes. This can be run
at a different clock rate than the main ethernet pipe
(2) CHDR_W - Sets the size of the v2e and e2v pipes. This can be run
at a different clock rate than the main ethernet pipe
(3) ENET_W - Sets the size of the eth_tx and eth_rx pipes.
eth_interface_tb runs traffic from e2c,e2v,v2e,c2e simultaneously
against the original xport_sv implementation, and against the new
implementation with widths of 64/128/512. A chdr_management node
info request queries the port info of the node0 in the eth_interface.
eth_ifc_synth_test.sv can be compiled with the make xsim target to test
out the size of various configurations.
Original-commit: eed4988cc266a63370a4332351d02fadedde3a3b
77 lines
2.8 KiB
Systemverilog
77 lines
2.8 KiB
Systemverilog
//
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// Copyright 2020 Ettus Research, a National Instruments Brand
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//
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// SPDX-License-Identifier: LGPL-3.0-or-later
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//
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// Module: eth_constants (Header File)
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//
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// Description:
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// Constants for ethernet
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//---------------------------------------
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// Ethernet constants
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//---------------------------------------
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localparam [47:0] ETH_ADDR_BCAST = {48{1'b1}};
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localparam [15:0] ETH_TYPE_IPV4 = 16'h0800;
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localparam [7:0] IPV4_PROTO_UDP = 8'h11;
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localparam [7:0] IPV4_LEN5 = 8'h45;
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// tUser conventions
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localparam BYTES_MSB = ENET_USER_W-2;
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localparam ERROR_BIT = ENET_USER_W-1;
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localparam SOF_BIT = ENET_USER_W-1;
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//---------------------------------------
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// Ethernet byte positions
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//---------------------------------------
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// Bytes 7-0-------------------------
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// | DstMAC_HI (16) | Preamble (48) |
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// ----------------------------------
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localparam PREAMBLE_BYTE = 0;
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localparam PREAMBLE_END = 5;
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localparam ETH_HDR_BYTE = 0;
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localparam DST_MAC_BYTE = ETH_HDR_BYTE+0;
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// Bytes 15-8-------------------------
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// | SrcMAC_HI (32) | DstMAC_LO (32) |
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// -----------------------------------
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localparam SRC_MAC_BYTE = ETH_HDR_BYTE+6;
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// Bytes 23-16---------------------------------------
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// | IPv4_Line0 (32)| EthType (16) | SrcMAC_LO (16) |
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// --------------------------------------------------
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localparam ETH_TYPE_BYTE = ETH_HDR_BYTE+12;
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localparam ETH_PAYLOAD_BYTE = ETH_HDR_BYTE+14;
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// Bytes 31-24--------------------------
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// | IPv4_Line2 (32) | IPv4_Line1 (32) |
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// -------------------------------------
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localparam IPV4_HDR_BYTE = ETH_PAYLOAD_BYTE;
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localparam IP_VERSION_BYTE = IPV4_HDR_BYTE+0;
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localparam IP_DSCP_BYTE = IPV4_HDR_BYTE+1;
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localparam IP_LENGTH_BYTE = IPV4_HDR_BYTE+2;
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localparam IP_ID_BYTE = IPV4_HDR_BYTE+4;
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localparam IP_FRAG_BYTE = IPV4_HDR_BYTE+6;
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localparam IP_TTL_BYTE = IPV4_HDR_BYTE+8;
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localparam PROTOCOL_BYTE = IPV4_HDR_BYTE+9;
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localparam IP_CHECKSUM_BYTE = IPV4_HDR_BYTE+10;
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// Bytes 39-32------------------------
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// | IPDstAddr (32) | IPSrcAddr (32) |
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// -----------------------------------
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localparam SRC_IP_BYTE = IPV4_HDR_BYTE+12;
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localparam DST_IP_BYTE = IPV4_HDR_BYTE+16;
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localparam IPV4_PAYLOAD_BYTE = IPV4_HDR_BYTE+20;
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// Bytes 48-40------------------------------------------------
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// | Chksum (16) | Length (16) | DstPort (16) | SrcPort (16) |
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// -----------------------------------------------------------
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localparam UDP_HDR_BYTE = IPV4_PAYLOAD_BYTE;
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localparam SRC_PORT_BYTE = UDP_HDR_BYTE+0;
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localparam DST_PORT_BYTE = UDP_HDR_BYTE+2;
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localparam UDP_LENGTH_BYTE = UDP_HDR_BYTE+4;
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localparam UDP_CHECKSUM_BYTE = UDP_HDR_BYTE+6;
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localparam UDP_END = UDP_CHECKSUM_BYTE+1; // last byte in the UDP header
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localparam MIN_PACKET_SIZE_BYTE = 63;
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//---------------------------------------
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// CHDR_BYTE_POSITION
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//---------------------------------------
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localparam CHDR_HDR_BYTE = 0;
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localparam CHDR_LENGTH_BYTE = CHDR_HDR_BYTE+2;
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