TI SDK8.4网络专题（待完善）

介绍

TI J721E SOC 千兆以太网交换子系统（SPDW NUSS）有两个端口，提供设备以太网通讯。支持MII接口的简化千兆独立媒体接口the Reduced Gigabit Media Independent Interface(RGMII)，Reduced Media Independent Interface(RMII),和物理层physical layer device(PHY)管理数据输入输出管理。

TI J721E SOC 有集成了两个千兆以太网交换机子系统在MCU域被叫做MCU——CPSW0和一个外部以太网端口（port 1）可选择RGMII和RMII接口和一个内部集成的可编程可通讯接口（CPPI）端口为Host Part 0 。CPPI数据包流接口支持8路TX通道和一路可通过TI J721E NAVSS 统一DMA外设根复合（UDMA-P）控制器操作。

驱动遵循标准linux网络接口体系和支持以下特征：

1. 10/100/1000Mbps操作模式
2. 自协商。
3. linux的NAPI 支持
4. VLAN过滤器
5. 以太工具
6. CPTS/PTP 依照 802.1AS-2011 (TSN)
7. EST/TAS 卸载依据802.1Q-2018 (TSN)
8. IET/优先级 卸载依照802.1Q-2018 (TSN)
9. 运输和存储 提高 时间敏感流（FQTSS）依照802.1Q-2018 参考之前的CBS or 802.1 Qav

驱动配置

SDK默认配置，自定义编译确保下面的配置使能。

CONFIG_TI_DAVINCI_MDIO
CONFIG_TI_CPSW_ALE
CONFIG_TI_AM65_CPSW_NUSS
CONFIG_TI_AM65_CPTS
CONFIG_TI_AM65_CPSW_TAS
CONFIG_PHY_TI_GMII_SEL

设备树绑定

参考下述文章
cpsw绑定
和k3-am654-cpts

MAC模式

启动接口

网络接口能自动配置依赖于root文件系统或者手动配置。配置如下

ip addr add 192.168.1.1/24 dev eth0
ip link set dev eth0 up

< or >

ifconfig eth0 <ip> netmask <mask> up

ethtool -i driver 获取驱动信息

MCU_CPSW0 接口能通过ethtool -i driver命令识别。提供一些支持特征的信息。

root@j7-evm:~# ethtool -i eth0
driver: am65-cpsw-nuss
version: 5.10.120-g95b90aa828
firmware-version: 
expansion-rom-version: 
bus-info: 46000000.ethernet
supports-statistics: yes
supports-test: no
supports-eeprom-access: no
supports-register-dump: yes
supports-priv-flags: yes

ethtool driver 显示关于设备/连接的标准信息

ethtool eth0

Settings for eth0:
	Supported ports: [ TP	 MII ]
	Supported link modes:   10baseT/Half 10baseT/Full
	                        100baseT/Half 100baseT/Full
	                        1000baseT/Full
	Supported pause frame use: Symmetric
	Supports auto-negotiation: Yes
	Supported FEC modes: Not reported
	Advertised link modes:  10baseT/Half 10baseT/Full
	                        100baseT/Half 100baseT/Full
	                        1000baseT/Full
	Advertised pause frame use: Symmetric
	Advertised auto-negotiation: Yes
	Advertised FEC modes: Not reported
	Link partner advertised link modes:  10baseT/Half 10baseT/Full
	                                     100baseT/Half 100baseT/Full
	                                     1000baseT/Full
	Link partner advertised pause frame use: Symmetric Receive-only
	Link partner advertised auto-negotiation: Yes
	Link partner advertised FEC modes: Not reported
	Speed: 1000Mb/s
	Duplex: Full
	Auto-negotiation: on
	master-slave cfg: preferred slave
	master-slave status: slave
	Port: Twisted Pair
	PHYAD: 0
	Transceiver: external
	MDI-X: Unknown
	Supports Wake-on: ubgs
	Wake-on: d
        SecureOn password: 00:00:00:00:00:00
        Current message level: 0x000020f7 (8439)
                               drv probe link ifdown ifup rx_err tx_err hw
	Link detected: yes

ethtool -k eth0 RX校验和取消

驱动默认使能RX的校验和卸载。能够通过ethtool -k 命令取消
ethtool -k eth0

Features for eth0:
rx-checksumming: on
tx-checksumming: on
	tx-checksum-ipv4: off [fixed]
	tx-checksum-ip-generic: on
	tx-checksum-ipv6: off [fixed]
	tx-checksum-fcoe-crc: off [fixed]
	tx-checksum-sctp: off [fixed]
scatter-gather: on
	tx-scatter-gather: on
	tx-scatter-gather-fraglist: off [fixed]
tcp-segmentation-offload: off
	tx-tcp-segmentation: off [fixed]
	tx-tcp-ecn-segmentation: off [fixed]
	tx-tcp-mangleid-segmentation: off [fixed]
	tx-tcp6-segmentation: off [fixed]
generic-segmentation-offload: on
generic-receive-offload: on
large-receive-offload: off [fixed]
rx-vlan-offload: off [fixed]
tx-vlan-offload: off [fixed]
ntuple-filters: off [fixed]
receive-hashing: off [fixed]
highdma: off [fixed]
rx-vlan-filter: on [fixed]
vlan-challenged: off [fixed]
tx-lockless: off [fixed]
netns-local: off [fixed]
tx-gso-robust: off [fixed]
tx-fcoe-segmentation: off [fixed]
tx-gre-segmentation: off [fixed]
tx-gre-csum-segmentation: off [fixed]
tx-ipxip4-segmentation: off [fixed]
tx-ipxip6-segmentation: off [fixed]
tx-udp_tnl-segmentation: off [fixed]
tx-udp_tnl-csum-segmentation: off [fixed]
tx-gso-partial: off [fixed]
tx-tunnel-remcsum-segmentation: off [fixed]
tx-sctp-segmentation: off [fixed]
tx-esp-segmentation: off [fixed]
tx-udp-segmentation: off [fixed]
tx-gso-list: off [fixed]
fcoe-mtu: off [fixed]
tx-nocache-copy: off
loopback: off [fixed]
rx-fcs: off [fixed]
rx-all: off [fixed]
tx-vlan-stag-hw-insert: off [fixed]
rx-vlan-stag-hw-parse: off [fixed]
rx-vlan-stag-filter: off [fixed]
l2-fwd-offload: off [fixed]
hw-tc-offload: on
esp-hw-offload: off [fixed]
esp-tx-csum-hw-offload: off [fixed]
rx-udp_tunnel-port-offload: off [fixed]
tls-hw-tx-offload: off [fixed]
tls-hw-rx-offload: off [fixed]
rx-gro-hw: off [fixed]
tls-hw-record: off [fixed]
rx-gro-list: off
macsec-hw-offload: off [fixed]
hsr-tag-ins-offload: off [fixed]
hsr-tag-rm-offload: off [fixed]
hsr-fwd-offload: off [fixed]
hsr-dup-offload: off [fixed]

通过ethtool -K rx-checksum on|off

VLAN配置

VLAN能增加/删除 通过ip 或者 config 程序。

共同平台时间同步模块（CPTS）

PTP官网参考链接