作者：盧浩
時間：2017.2.13
轉載請註明出處
嵌入式愛好者開發羣：122879839
打開vivado，基於zynq-zed工程，添加IP->AXI 1G/2.5G ETHERNET SUBSYSTEM。雙擊IP模塊，選擇1000BASE-X。如下圖：
在zynq模塊上把hp0選中，如下圖：
千兆光IP的中斷用zynq的IRQ_F2P的中斷，記得把MM2S S2MM中斷與IRQ_F2P連接，另外MGT_CLK的時鐘由底板外部差分時鐘提供，另外需要添加axi_interconnect IP.然後用自動連接，模塊就生成了。
如下圖：
由於工程太大，沒法截圖完整，我把最重要的部分截出來了。
接下來就是綜合，配置引腳，最後生成bit文件，這些流程和之前擴展GPIO UART是一樣的。
BIT文件生成之後，export hardware，launch sdk，生成FSBL，生成BOOT.bin，生成DTS文件，這些步驟在上篇文章都講過。
這裏需要重點講一下，在內核配置部分，需要添加axi ethernet驅動的支持。
配置如下：
CONFIG_ETHERNET
CONFIG_NET_VENDOR_XILINX
CONFIG_XILINX_AXI_EMAC
CONFIG_XILINX_PHY (For testing SGMII/1000Base-x Configuration with PCS/PMA Core)
生成的網卡dts描述信息：
axi_ethernet_2: ethernet@41080000 {
axistream-connected = <&axi_ethernet_2_dma>;
axistream-control-connected = <&axi_ethernet_2_dma>;
clock-frequency = <100000000>;
clock-names = "ref_clk";
clocks = <&clkc 0>;
compatible = "xlnx,axi-ethernet-1.00.a";
device_type = "network";
interrupt-parent = <&intc>;
interrupts = <0 54 4>;
phy-handle = <&phy1>;
phy-mode = "sgmii";
reg = <0x41080000 0x40000>;
xlnx = <0x0>;
xlnx,axiliteclkrate = <0x0>;
xlnx,axisclkrate = <0x0>;
xlnx,phy-type = <0x5>;
xlnx,phyaddr = <0x1>;
xlnx,rable = <0x0>;
xlnx,rxcsum = <0x0>;
xlnx,rxmem = <0x1000>;
xlnx,txcsum = <0x0>;
axi_ethernet_2_mdio: mdio {
#address-cells = <1>;
#size-cells = <0>;
phy1: phy@1 {
device_type = "ethernet-phy";
reg = <1>;
};
};
};
在linux下啓動，可以看到如下的log：
xilinx_axienet 41080000.ethernet: TX_CSUM 0
xilinx_axienet 41080000.ethernet: RX_CSUM 0
libphy: Xilinx Axi Ethernet MDIO: probed
xilinx_axienet 41080000.ethernet eth3: Link is Down
xilinx_axienet 41080000.ethernet eth3: setting Axi Ethernet mac speed 1000BASEX
xilinx_axienet 41080000.ethernet eth3: Link is Up - 1Gbps/Full - flow control off
xilinx_axienet 41080000.ethernet eth3: setting Axi Ethernet mac speed 1000BASEX
IPv6: ADDRCONF(NETDEV_CHANGE): eth3: link becomes ready
下面我們來測試一下性能，
Client connecting to 172.28.96.61, TCP port 5001
TCP window size: 320 KByte (WARNING: requested 1.00 MByte)
------------------------------------------------------------
[ 3] local 172.28.96.19 port 46392 connected with 172.28.96.61 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0- 1.0 sec 69.9 MBytes 586 Mbits/sec
[ 3] 1.0- 2.0 sec 66.9 MBytes 561 Mbits/sec
[ 3] 2.0- 3.0 sec 66.9 MBytes 561 Mbits/sec
[ 3] 3.0- 4.0 sec 66.8 MBytes 560 Mbits/sec
[ 3] 4.0- 5.0 sec 66.8 MBytes 560 Mbits/sec
[ 3] 5.0- 6.0 sec 66.6 MBytes 559 Mbits/sec
[ 3] 6.0- 7.0 sec 66.9 MBytes 561 Mbits/sec
[ 3] 7.0- 8.0 sec 66.5 MBytes 558 Mbits/sec
[ 3] 8.0- 9.0 sec 66.8 MBytes 560 Mbits/sec
[ 3] 9.0-10.0 sec 66.8 MBytes 560 Mbits/sec
[ 3] 0.0-10.0 sec 671 MBytes 563 Mbits/sec
千兆網卡在TCP下測試的性能是560Mb/s，速度還行，基本上能滿足大部分用戶的需求。
