Baremetal XXV Ethernet driver
- Confluence Wiki Admin (Unlicensed)
- Gupta, Suraj
- harinik (Unlicensed)
Table of Contents
Introduction
The AXI 10G/25G High Speed Ethernet Subsystem and USXGMII core are soft Xilinx IP core for use with the Xilinx Vivado® Design Suite. XXV Ethernet subsystem consists of a 10G/25G MAC including a 10BaseR PHY.
USXGMII Ethernet subsystem consists of a MAC similar to XXV For more information, please refer to the 10G/25G High Speed Ethernet Subsystem and UXSGMII product page which includes links to the official documentation and resource utilization.
Driver Sources
The source code for the driver is included with the Vitis Unified Software Platform installation, as well as being available in the Xilinx Github repository.
| Driver Name | Path in Vitis | Path in Github |
|---|---|---|
| xxvethernet | <Vitis Install Directory>/data/embedded/XilinxProcessorIPLib/drivers/xxvethernet_<version> | https://github.com/Xilinx/embeddedsw/tree/master/XilinxProcessorIPLib/drivers/xxvethernet |
Note: To view the sources for a particular release, use the rel-version tag in github. For example, for the 2020.1 release, the proper version of the code is: https://github.com/Xilinx/embeddedsw/tree/xilinx-v2020.1/XilinxProcessorIPLib/drivers/xxvethernet
The driver source code is organized into different folders. The table below shows the xxvethernet driver source organization.
| Directory | Description |
|---|---|
| doc | Provides the API and data structure details |
| data | Driver .tcl, .mdd file and yaml files |
| examples | Example applications that show how to use the driver features |
| src | Driver source files, make and cmake files |
Note: AMD Xilinx embeddedsw build flow is changed from 2023.2 release to adapt to the new system device tree based flow. For further information, refer to the wiki page Porting embeddedsw components to system device tree (SDT) based flow - Xilinx Wiki - Confluence (atlassian.net).
The .yaml(in data folder) and CMakeLists.txt(in src folder) files are needed for the System Device Tree based flow. The Driver .tcl and .mdd files are for the older build flow which will be deprecated in the future.
Driver Implementation
For a full list of features supported by these IP, please refer to the 10G/25G High Speed Ethernet Subsystem and UXSGMII product pages.
Features
The XXV Ethernet Standalone driver supports the following features: - 10G speed on xxvethernet MAC
- 1G/2.5G/5G/10G speeds on USXGMII MAC
- PHY management and GT management.
- Support for DMA interface
- Statistics gathering
- Optional support for jumbo frames up to 16 KB
Known Issues and Limitations
The following is a list of known limitations of the driver and features of the IP that are not currently implemented:
- Full checksum offload, VLAN, flow control and 1588 are not supported
- The offset of user configuration registers in the IP was updated (and removed in case of USER_REG_1) which breaks backward compatibility of any custom user config application code with newer versions of the IP. Please make sure to use the correct offset as per the IP version as specific below and ignore "XXE_USR0_OFFSET". Please note that this has NO impact on the example as this definition is not used.
- Upto IP Version 2.2 https://docs.xilinx.com/v/u/2.2-English/pg210-25g-ethernet, USER_REG_0 is at offset 0x184 and USER_REG_1 is at offset 0x188
- IP Version 2.3 and above https://docs.xilinx.com/v/u/2.3-English/pg210-25g-ethernet, USER_REG_0 is at offset 0x134 and USER_REG_1 is removed
Example Design Architecture
The examples that 10G/25G High Speed Ethernet Subsystem/USXGMII AXI4-Stream bus is connected to MCMDA DMA IP.
Example Applications
Refer to the driver examples directory for various example applications that exercise the different features of the driver. Each application is linked in the table below. The following sections describe the usage and expected output of the various applications. These example applications can be imported into the Vitis IDE from the Board Support Package settings tab.
Links to Examples
Examples Path: https://github.com/Xilinx/embeddedsw/tree/master/XilinxProcessorIPLib/drivers/xxvethernet/examples
| Test Name | Example Source | Description |
|---|---|---|
| XXVEthernet mcdma example | xxxvethernet_example_intr_mcdma.c | This is an interrupt driven loopback example demonstrating a simple send-receive test case using XXVEthernet and MCDMA. This test loops through all 16 channels of the MCDMA connected to XXVEthernet MAC; an internal HW logic was used to direct RX packets to one of the 16 MCDMA channels using MAC address as the filter. User applications and design need to use their own logic if they intend to direct traffic to different RX channels deterministically. |
| USXGMII mcdma example | xxxvethernet_usxgmii_example_intr_mcdma.c | This is an interrupt driven loopback example demonstrating a simple send-receive test case using USXGMII and MCDMA. Since USXGMII has no internal loopback, this test needs to be done with and external loopback on the HW. The internal USXGMII phy is setup to enable auto-negotiation at 1G speed by default. This test loops through all 16 channels of the MCDMA connected to USXGMII MAC; an internal HW logic was used to direct RX packets to one of the 16 MCDMA channels using MAC address as the filter. User applications and design need to use their own logic if they intend to direct traffic to different RX channels deterministic-ally. |
Example Application Usage
XXVEthernet mcdma example
This is an interrupt driven loopback example demonstrating a simple send-receive test case using XXVEthernet and MCDMA.
Expected Output
--- Enter main() --- This test may take several minutes to finish ChanId 1, MacAddr: 0x0 0x0 0x53 0xE 0x9F 0xB0 ChanId 1 Single frame interrupt example passed ChanId 2, MacAddr: 0x0 0xF 0x53 0xE 0x9F 0xB0 ChanId 2 Single frame interrupt example passed ChanId 3, MacAddr: 0x0 0x10 0x53 0xE 0x9F 0xB0 ChanId 3 Single frame interrupt example passed ChanId 4, MacAddr: 0x0 0x18 0x53 0xE 0x9F 0xB0 ChanId 4 Single frame interrupt example passed ChanId 5, MacAddr: 0x0 0x20 0x53 0xE 0x9F 0xB0 ChanId 5 Single frame interrupt example passed ChanId 6, MacAddr: 0x0 0x28 0x53 0xE 0x9F 0xB0 ChanId 6 Single frame interrupt example passed ChanId 7, MacAddr: 0x0 0x30 0x53 0xE 0x9F 0xB0 ChanId 7 Single frame interrupt example passed ChanId 8, MacAddr: 0x0 0x38 0x53 0xE 0x9F 0xB0 ChanId 8 Single frame interrupt example passed ChanId 9, MacAddr: 0x0 0x40 0x53 0xE 0x9F 0xB0 ChanId 9 Single frame interrupt example passed ChanId 10, MacAddr: 0x0 0x48 0x53 0xE 0x9F 0xB0 ChanId 10 Single frame interrupt example passed ChanId 11, MacAddr: 0x0 0x50 0x53 0xE 0x9F 0xB0 ChanId 11 Single frame interrupt example passed ChanId 12, MacAddr: 0x0 0x58 0x53 0xE 0x9F 0xB0 ChanId 12 Single frame interrupt example passed ChanId 13, MacAddr: 0x0 0x60 0x53 0xE 0x9F 0xB0 ChanId 13 Single frame interrupt example passed ChanId 14, MacAddr: 0x0 0x68 0x53 0xE 0x9F 0xB0 ChanId 14 Single frame interrupt example passed ChanId 15, MacAddr: 0x0 0x70 0x53 0xE 0x9F 0xB0 ChanId 15 Single frame interrupt example passed ChanId 16, MacAddr: 0x0 0x78 0x53 0xE 0x9F 0xB0 ChanId 16 Single frame interrupt example passed Test passed --- Exiting main() ---
USXGMII mcdma example
This is an interrupt driven loopback example demonstrating a simple send-receive test case using USXGMII and MCDMA.
Expected Output
--- Enter main() --- This test may take several minutes to finish USXGMII setup at 1000Mbps ChanId 1, Dest MacAddr: 0x0 0x0 0x53 0xE 0x9F 0x0 ChanId 1 Single frame interrupt example passed ChanId 2, Dest MacAddr: 0x0 0x0 0x53 0xE 0x9F 0x10 ChanId 2 Single frame interrupt example passed ChanId 3, Dest MacAddr: 0x0 0x0 0x53 0xE 0x9F 0x20 ChanId 3 Single frame interrupt example passed ChanId 4, Dest MacAddr: 0x0 0x0 0x53 0xE 0x9F 0x30 ChanId 4 Single frame interrupt example passed ChanId 5, Dest MacAddr: 0x0 0x0 0x53 0xE 0x9F 0x40 ChanId 5 Single frame interrupt example passed ChanId 6, Dest MacAddr: 0x0 0x0 0x53 0xE 0x9F 0x50 ChanId 6 Single frame interrupt example passed ChanId 7, Dest MacAddr: 0x0 0x0 0x53 0xE 0x9F 0x60 ChanId 7 Single frame interrupt example passed ChanId 8, Dest MacAddr: 0x0 0x0 0x53 0xE 0x9F 0x70 ChanId 8 Single frame interrupt example passed ChanId 9, Dest MacAddr: 0x0 0x0 0x53 0xE 0x9F 0x80 ChanId 9 Single frame interrupt example passed ChanId 10, Dest MacAddr: 0x0 0x0 0x53 0xE 0x9F 0x90 ChanId 10 Single frame interrupt example passed ChanId 11, Dest MacAddr: 0x0 0x0 0x53 0xE 0x9F 0xA0 ChanId 11 Single frame interrupt example passed ChanId 12, Dest MacAddr: 0x0 0x0 0x53 0xE 0x9F 0xB0 ChanId 12 Single frame interrupt example passed ChanId 13, Dest MacAddr: 0x0 0x0 0x53 0xE 0x9F 0xC0 ChanId 13 Single frame interrupt example passed ChanId 14, Dest MacAddr: 0x0 0x0 0x53 0xE 0x9F 0xD0 ChanId 14 Single frame interrupt example passed ChanId 15, Dest MacAddr: 0x0 0x0 0x53 0xE 0x9F 0xE0 ChanId 15 Single frame interrupt example passed ChanId 16, Dest MacAddr: 0x0 0x0 0x53 0xE 0x9F 0xF0 ChanId 16 Single frame interrupt example passed Test passed --- Exiting main() ---
Change Log
2024.2
https://github.com/Xilinx/embeddedsw/blob/xilinx_v2024.2/doc/ChangeLog#L274
2024.1
https://github.com/Xilinx/embeddedsw/blob/xilinx_v2024.1/doc/ChangeLog#L389
2023.2
https://github.com/Xilinx/embeddedsw/blob/xilinx_v2023.2/doc/ChangeLog#L564
2023.1
None
2022.2
None
2022.1
None
2021.2
https://github.com/Xilinx/embeddedsw/blob/xlnx_rel_v2021.2/doc/ChangeLog#L66
2021.1
https://github.com/Xilinx/embeddedsw/blob/xlnx_rel_v2021.1/doc/ChangeLog#L323
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