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eth: Update Nexus K3P-Q example design to use 32-bit MACs at 10G

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Signed-off-by: Alex Forencich <alex@alexforencich.com>
This commit is contained in:
Alex Forencich
2025-11-05 20:46:30 -08:00
parent 4682591ec3
commit ae05128b44
8 changed files with 97 additions and 16 deletions
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2
src/eth/example/Nexus_K3P_Q/fpga/fpga/Makefile
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@@ -35,7 +35,7 @@ XDC_FILES += $(TAXI_SRC_DIR)/sync/syn/vivado/taxi_sync_signal.tcl
IP_TCL_FILES = $(TAXI_SRC_DIR)/eth/rtl/us/taxi_eth_phy_25g_us_gty_25g_161.tcl
# Configuration
# CONFIG_TCL_FILES = ./config.tcl
CONFIG_TCL_FILES = ./config.tcl
include ../common/vivado.mk

22
src/eth/example/Nexus_K3P_Q/fpga/fpga/config.tcl Normal file
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@@ -0,0 +1,22 @@
# SPDX-License-Identifier: MIT
#
# Copyright (c) 2025 FPGA Ninja, LLC
#
# Authors:
# - Alex Forencich
#
set params [dict create]
# 10G MAC configuration
dict set params CFG_LOW_LATENCY "1"
dict set params COMBINED_MAC_PCS "1"
dict set params MAC_DATA_W "64"
# apply parameters to top-level
set param_list {}
dict for {name value} $params {
lappend param_list $name=$value
}
set_property generic $param_list [get_filesets sources_1]

4
src/eth/example/Nexus_K3P_Q/fpga/fpga_10g/Makefile
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@@ -32,10 +32,10 @@ XDC_FILES += $(TAXI_SRC_DIR)/sync/syn/vivado/taxi_sync_reset.tcl
XDC_FILES += $(TAXI_SRC_DIR)/sync/syn/vivado/taxi_sync_signal.tcl
# IP
IP_TCL_FILES = $(TAXI_SRC_DIR)/eth/rtl/us/taxi_eth_phy_25g_us_gty_10g_161.tcl
IP_TCL_FILES = $(TAXI_SRC_DIR)/eth/rtl/us/taxi_eth_phy_10g_us_gty_161.tcl
# Configuration
# CONFIG_TCL_FILES = ./config.tcl
CONFIG_TCL_FILES = ./config.tcl
include ../common/vivado.mk

22
src/eth/example/Nexus_K3P_Q/fpga/fpga_10g/config.tcl Normal file
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@@ -0,0 +1,22 @@
# SPDX-License-Identifier: MIT
#
# Copyright (c) 2025 FPGA Ninja, LLC
#
# Authors:
# - Alex Forencich
#
set params [dict create]
# 10G MAC configuration
dict set params CFG_LOW_LATENCY "1"
dict set params COMBINED_MAC_PCS "1"
dict set params MAC_DATA_W "32"
# apply parameters to top-level
set param_list {}
dict for {name value} $params {
lappend param_list $name=$value
}
set_property generic $param_list [get_filesets sources_1]

14
src/eth/example/Nexus_K3P_Q/fpga/rtl/fpga.sv
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@@ -17,9 +17,16 @@ Authors:
*/
module fpga #
(
// simulation (set to avoid vendor primitives)
parameter logic SIM = 1'b0,
// vendor ("GENERIC", "XILINX", "ALTERA")
parameter string VENDOR = "XILINX",
parameter string FAMILY = "kintexuplus"
// device family
parameter string FAMILY = "kintexuplus",
// 10G/25G MAC configuration
parameter logic CFG_LOW_LATENCY = 1'b1,
parameter logic COMBINED_MAC_PCS = 1'b1,
parameter MAC_DATA_W = 64
)
(
/*
@@ -165,7 +172,10 @@ sync_reset_125mhz_inst (
fpga_core #(
.SIM(SIM),
.VENDOR(VENDOR),
.FAMILY(FAMILY)
.FAMILY(FAMILY),
.CFG_LOW_LATENCY(CFG_LOW_LATENCY),
.COMBINED_MAC_PCS(COMBINED_MAC_PCS),
.MAC_DATA_W(MAC_DATA_W)
)
core_inst (
/*

19
src/eth/example/Nexus_K3P_Q/fpga/rtl/fpga_core.sv
View File

@@ -17,9 +17,16 @@ Authors:
*/
module fpga_core #
(
// simulation (set to avoid vendor primitives)
parameter logic SIM = 1'b0,
// vendor ("GENERIC", "XILINX", "ALTERA")
parameter string VENDOR = "XILINX",
parameter string FAMILY = "kintexuplus"
// device family
parameter string FAMILY = "kintexuplus",
// 10G/25G MAC configuration
parameter logic CFG_LOW_LATENCY = 1'b1,
parameter logic COMBINED_MAC_PCS = 1'b1,
parameter MAC_DATA_W = 64
)
(
/*
@@ -97,9 +104,9 @@ assign qsfp_mgt_refclk_out = qsfp_mgt_refclk_bufg;
wire qsfp_rst;
taxi_axis_if #(.DATA_W(64), .ID_W(8)) axis_qsfp_tx[8]();
taxi_axis_if #(.DATA_W(MAC_DATA_W), .ID_W(8)) axis_qsfp_tx[8]();
taxi_axis_if #(.DATA_W(96), .KEEP_W(1), .ID_W(8)) axis_qsfp_tx_cpl[8]();
taxi_axis_if #(.DATA_W(64), .ID_W(8)) axis_qsfp_rx[8]();
taxi_axis_if #(.DATA_W(MAC_DATA_W), .ID_W(8)) axis_qsfp_rx[8]();
taxi_axis_if #(.DATA_W(16), .KEEP_W(1), .KEEP_EN(0), .LAST_EN(0), .USER_EN(1), .USER_W(1), .ID_EN(1), .ID_W(8)) axis_qsfp_stat[2]();
if (SIM) begin
@@ -166,7 +173,7 @@ for (genvar n = 0; n < 2; n = n + 1) begin : gty_quad
.CNT(4),
// GT config
.CFG_LOW_LATENCY(1),
.CFG_LOW_LATENCY(CFG_LOW_LATENCY),
// GT type
.GT_TYPE("GTY"),
@@ -175,7 +182,9 @@ for (genvar n = 0; n < 2; n = n + 1) begin : gty_quad
.GT_TX_POLARITY(n == 1 ? 4'b1001 : 4'b0000),
.GT_RX_POLARITY(4'b0000),
// MAC/PHY parameters
// MAC/PHY config
.COMBINED_MAC_PCS(COMBINED_MAC_PCS),
.DATA_W(MAC_DATA_W),
.PADDING_EN(1'b1),
.DIC_EN(1'b1),
.MIN_FRAME_LEN(64),

3
src/eth/example/Nexus_K3P_Q/fpga/tb/fpga_core/Makefile
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@@ -38,6 +38,9 @@ VERILOG_SOURCES := $(call uniq_base,$(call process_f_files,$(VERILOG_SOURCES)))
export PARAM_SIM := "1'b1"
export PARAM_VENDOR := "\"XILINX\""
export PARAM_FAMILY := "\"kintexuplus\""
export PARAM_CFG_LOW_LATENCY := "1'b1"
export PARAM_COMBINED_MAC_PCS := "1'b1"
export PARAM_MAC_DATA_W := "64"
ifeq ($(SIM), icarus)
PLUSARGS += -fst

17
src/eth/example/Nexus_K3P_Q/fpga/tb/fpga_core/test_fpga_core.py
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@@ -13,6 +13,7 @@ import logging
import os
import sys
import pytest
import cocotb_test.simulator
import cocotb
@@ -50,12 +51,20 @@ class TB:
for ch in inst.mac_inst.ch:
gt_inst = ch.ch_inst.gt.gt_inst
if ch.ch_inst.DATA_W.value == 64:
if ch.ch_inst.CFG_LOW_LATENCY.value:
clk = 2.482
gbx_cfg = (66, [64, 65])
else:
clk = 2.56
gbx_cfg = None
else:
if ch.ch_inst.CFG_LOW_LATENCY.value:
clk = 3.102
gbx_cfg = (66, [64, 65])
else:
clk = 3.2
gbx_cfg = None
cocotb.start_soon(Clock(gt_inst.tx_clk, clk, units="ns").start())
cocotb.start_soon(Clock(gt_inst.rx_clk, clk, units="ns").start())
@@ -111,6 +120,8 @@ async def mac_test(tb, source, sink):
for k in range(1200):
await RisingEdge(tb.dut.clk_125mhz)
sink.clear()
tb.log.info("Multiple small packets")
count = 64
@@ -189,7 +200,8 @@ def process_f_files(files):
return list(lst.values())
def test_fpga_core(request):
@pytest.mark.parametrize("mac_data_w", [32, 64])
def test_fpga_core(request, mac_data_w):
dut = "fpga_core"
module = os.path.splitext(os.path.basename(__file__))[0]
toplevel = dut
@@ -209,6 +221,9 @@ def test_fpga_core(request):
parameters['SIM'] = "1'b1"
parameters['VENDOR'] = "\"XILINX\""
parameters['FAMILY'] = "\"kintexuplus\""
parameters['CFG_LOW_LATENCY'] = "1'b1"
parameters['COMBINED_MAC_PCS'] = "1'b1"
parameters['MAC_DATA_W'] = mac_data_w
extra_env = {f'PARAM_{k}': str(v) for k, v in parameters.items()}