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DmitryKo's avatar
DmitryKo
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2 years ago

1G/10Gb Ethernet FPGA IP uses XGMII instead of GMII in 1Gb mode

Hello, all. I attempt to launch the Ethernet 1Gb link through the 1G/10Gbe and 10GBASE-KR PHY Intel Arria 10 FPGA IP. 1Gb patch-cord connects SFP+ port from board with Arria10 with SFP+ port on ...
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ZiYing_Intel's avatar
ZiYing_Intel
Icon for Frequent Contributor rankFrequent Contributor
2 years ago

Hi Dmitry,

Q1. Can you check back whether you got connect to the correct port?

Q2. In the documentation, it only shows about the xgmii_rx_data[63:0]/[31:0].

The width is:

• 64 bits for 1G/2.5G/10G configurations.

• 32 bits for 10M/100M/1G/2.5G/5G/10G (USXGMII) configurations.

For further information, you may refer to link below https://www.intel.com/content/www/us/en/docs/programmable/683617/21-1/1g-2-5g-5g-10g-multi-rate-ethernet-phy.html

Best regards,

zying


DmitryKo's avatar
DmitryKo
Icon for New Contributor rankNew Contributor
2 years ago

Hi, zying.

Q1. I checked. I connected to correct port.

Q2. I use 1G/10Gbe and 10GBASE-KR PHY Intel Arria 10 FPGA IP, not 1G/2.5G/5G/10G Multi-rate Ethernet PHY.

In https://www.intel.com/content/www/us/en/docs/programmable/683426/18-1-18-1/ll-ethernet-10g-mac-operating-modes.html
in chapter 1.3 I read:
Speed Mode: 1G/10G
MAC Interface:

  • 8-bit GMII
  • 32-bit XGMII
  • 64-bit XGMII (Use legacy Ethernet 10G MAC XGMII interface enabled

Intel® PHY Compliance: 1G/10GbE Ethernet PHY IP

How I can manage which interface will be used? I think the interface is selected by CORE automatically. But I didn't find this information (which interface used on which speed) in documentation. It was my question 1.

Best regards,

Dmitry