作者：付汉杰，hankf@xilinx.com，文章转载自：博客园
MPSoC的MAC支持1588。在Linux Kernel的配置项中使能CONFIG_MACB_USE_HWSTAMP，并在Linux rootfs添加Linux ptp/ethtool，就可以运行1588的软件命令ptp4l。
PetaLinux下，配置Linux rootfs命令是petalinux-config -c rootfs。1588在Linux用户态的应用程序软件包是Linuxptp，可执行文件是ptp4l。
1. 在zcu106之间运行1588
下面的命令，在zcu106之间运行1588。运行顺序是先在第一块单板（master）启动1588 master；再在第二块单板（slave）上启动1588 slave；接下来在第一块单板（master）终止1588 master，模拟1588 master故障；最后再在第一块单板（master）启动1588 master。
1.1. master
1588 master的命令是ptp4l -i eth0 -m。运行记录如下：
root@zcu106_vcu_trd:~# # master
root@zcu106_vcu_trd:~# uname -a
Linux zcu106_vcu_trd 5.4.0-xilinx-v2020.2 #1 SMP Wed Feb 24 10:06:51 UTC 2021 aarch64 GNU/Linux
root@zcu106_vcu_trd:~# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:0A:35:04:D2:38
inet addr:10.164.16.102 Bcast:10.164.16.255 Mask:255.255.255.0
inet6 addr: fe80::20a:35ff:fe04:d238/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:381 errors:0 dropped:0 overruns:0 frame:0
TX packets:438 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:37123 (36.2 KiB) TX bytes:49863 (48.6 KiB)
Interrupt:31
root@zcu106_vcu_trd:~# ptp4l -i eth0 -m
ptp4l[577.050]: selected /dev/ptp0 as PTP clock
ptp4l[577.051]: port 1: INITIALIZING to LISTENING on INIT_COMPLETE
ptp4l[577.051]: port 0: INITIALIZING to LISTENING on INIT_COMPLETE
ptp4l[583.599]: port 1: LISTENING to MASTER on ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES
ptp4l[583.599]: selected local clock 000a35.fffe.04d238 as best master
ptp4l[583.600]: assuming the grand master role
^C
root@zcu106_vcu_trd:~# ptp4l -i eth0 -m
ptp4l[637.574]: selected /dev/ptp0 as PTP clock
ptp4l[637.575]: port 1: INITIALIZING to LISTENING on INIT_COMPLETE
ptp4l[637.575]: port 0: INITIALIZING to LISTENING on INIT_COMPLETE
ptp4l[644.708]: port 1: LISTENING to MASTER on ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES
ptp4l[644.708]: selected local clock 000a35.fffe.04d238 as best master
ptp4l[644.708]: assuming the grand master role
^Croot@zcu106_vcu_trd:~#上面的1588 master，先启动，再停止，再启动。
1.2. slave
1588 slave的命令是ptp4l -i eth0 -s -m。运行记录如下：
root@zcu106_vcu_trd:~# # slave
root@zcu106_vcu_trd:~# uname -a
Linux zcu106_vcu_trd 5.4.0-xilinx-v2020.2 #1 SMP Wed Feb 24 10:06:51 UTC 2021 aarch64 GNU/Linux
root@zcu106_vcu_trd:~# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 06:51:E5:C2:71:88
inet addr:10.164.16.8 Bcast:10.164.16.255 Mask:255.255.255.0
inet6 addr: fe80::451:e5ff:fec2:7188/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:880 errors:0 dropped:26 overruns:0 frame:0
TX packets:484 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:62884 (61.4 KiB) TX bytes:51650 (50.4 KiB)
Interrupt:31
root@zcu106_vcu_trd:~# ptp4l -i eth0 -s -m
ptp4l[577.398]: selected /dev/ptp0 as PTP clock
ptp4l[577.399]: port 1: INITIALIZING to LISTENING on INIT_COMPLETE
ptp4l[577.399]: port 0: INITIALIZING to LISTENING on INIT_COMPLETE
ptp4l[577.755]: port 1: new foreign master 000a35.fffe.04d238-1
ptp4l[581.755]: selected best master clock 000a35.fffe.04d238
ptp4l[581.755]: port 1: LISTENING to UNCALIBRATED on RS_SLAVE
ptp4l[583.754]: master offset -701 s0 freq +4079 path delay 2992
ptp4l[584.754]: master offset -957 s2 freq +3823 path delay 3037
ptp4l[584.754]: port 1: UNCALIBRATED to SLAVE on MASTER_CLOCK_SELECTED
ptp4l[585.754]: master offset -727 s2 freq +3096 path delay 3037
ptp4l[586.754]: master offset 430 s2 freq +4035 path delay 3035
ptp4l[587.754]: master offset 437 s2 freq +4171 path delay 3034
ptp4l[588.754]: master offset 351 s2 freq +4216 path delay 3035
ptp4l[589.754]: master offset 222 s2 freq +4192 path delay 3035
ptp4l[590.754]: master offset -108 s2 freq +3929 path delay 3047
ptp4l[605.754]: master offset 229 s2 freq +4239 path delay 3019
ptp4l[606.754]: master offset 18 s2 freq +4096 path delay 3035
ptp4l[607.754]: master offset -156 s2 freq +3928 path delay 3035
ptp4l[615.730]: port 1: SLAVE to LISTENING on ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES
ptp4l[615.731]: selected local clock 0651e5.fffe.c27188 as best master
ptp4l[621.758]: selected local clock 0651e5.fffe.c27188 as best master
ptp4l[629.169]: selected local clock 0651e5.fffe.c27188 as best master
ptp4l[635.881]: selected local clock 0651e5.fffe.c27188 as best master
ptp4l[638.863]: selected best master clock 000a35.fffe.04d238
ptp4l[638.863]: port 1: LISTENING to UNCALIBRATED on RS_SLAVE
ptp4l[640.862]: master offset 4627 s2 freq +8664 path delay 2932
ptp4l[640.862]: port 1: UNCALIBRATED to SLAVE on MASTER_CLOCK_SELECTED
ptp4l[641.862]: master offset -22 s2 freq +5403 path delay 2978
ptp4l[642.862]: master offset -2147 s2 freq +3271 path delay 3580
ptp4l[643.862]: master offset -868 s2 freq +3906 path delay 3279
ptp4l[644.862]: master offset -644 s2 freq +3870 path delay 3019
ptp4l[645.862]: master offset -402 s2 freq +3919 path delay 2978
ptp4l[646.863]: master offset -103 s2 freq +4097 path delay 2978
ptp4l[647.863]: master offset -157 s2 freq +4012 path delay 3001
ptp4l[648.863]: master offset -350 s2 freq +3772 path delay 3042
ptp4l[649.863]: master offset 126 s2 freq +4143 path delay 3021
ptp4l[650.863]: master offset 40 s2 freq +4095 path delay 3021
在1588 slave的打印中可以看到，slave先选择外部时钟master 000a35.fffe.04d238。当外部master退出后，再选择了本地时钟，0651e5.fffe.c27188。当外部master正常后，又选择了外部时钟master 000a35.fffe.04d238。
时钟的标识，是网卡的MAC地址。
master offset表示主从端时间差，单位是ns。s0，s1，s2 : 表示1588的不同状态，s0表示未锁定，s1表示正在同步，s2表示锁定。
2. PC机上运行1588
也可以在PC机上运行1588。首先在master和slave的PC机安装1588的Linux用户态应用程序，Linuxptp。
hankf@XSZGS4:~$ sudo apt install linuxptp Reading package lists... Done Building dependency tree Reading state information... Done The following packages were automatically installed and are no longer required: libfwup1 libllvm9 linux-hwe-5.4-headers-5.4.0-51 linux-hwe-5.4-headers-5.4.0-52 linux-hwe-5.4-headers-5.4.0-53 linux-hwe-5.4-headers-5.4.0-56 linux-hwe-5.4-headers-5.4.0-58 linux-hwe-5.4-headers-5.4.0-59 linux-hwe-5.4-headers-5.4.0-60 linux-hwe-5.4-headers-5.4.0-62 linux-hwe-5.4-headers-5.4.0-65 linux-hwe-5.4-headers-5.4.0-66 linux-hwe-5.4-headers-5.4.0-67 Use 'sudo apt autoremove' to remove them. The following NEW packages will be installed: linuxptp 0 upgraded, 1 newly installed, 0 to remove and 18 not upgraded. Need to get 112 kB of archives. After this operation, 418 kB of additional disk space will be used. Get:1 http://hk.archive.ubuntu.com/ubuntu bionic/universe amd64 linuxptp amd64 1.8-1 [112 kB] Fetched 112 kB in 3s (33.0 kB/s) Selecting previously unselected package linuxptp. (Reading database ... 477696 files and directories currently installed.) Preparing to unpack .../linuxptp_1.8-1_amd64.deb ... Unpacking linuxptp (1.8-1) ... Setting up linuxptp (1.8-1) ... Processing triggers for man-db (2.8.3-2ubuntu0.1) ...
2.1. master
然后运行1588 master。
hankf@XSZGS4:~$ sudo ptp4l -i ens12f2 -m [sudo] password for hankf: ptp4l[4247020.499]: selected /dev/ptp4 as PTP clock ptp4l[4247020.500]: driver changed our HWTSTAMP options ptp4l[4247020.500]: tx_type 1 not 1 ptp4l[4247020.500]: rx_filter 1 not 12 ptp4l[4247020.500]: port 1: INITIALIZING to LISTENING on INITIALIZE ptp4l[4247020.500]: port 0: INITIALIZING to LISTENING on INITIALIZE ptp4l[4247020.501]: port 1: link up ptp4l[4247028.079]: port 1: LISTENING to MASTER on ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES ptp4l[4247028.079]: selected best master clock 6c92bf.fffe.ccc500 ptp4l[4247028.079]: assuming the grand master role ^C hankf@XSZGS4:~$
2.2. Slave
运行1588 Slave。
xilinx@xszgs2:~$ ifconfig eno3 eno3: flags=4163mtu 1500 inet 10.164.177.202 netmask 255.255.255.0 broadcast 10.164.177.255 inet6 fe80::f56c:dc30:fa49:b101 prefixlen 64 scopeid 0x20 ether d0:94:66:55:0d:e9 txqueuelen 1000 (Ethernet) RX packets 39897217 bytes 48144750947 (48.1 GB) RX errors 107 dropped 6 overruns 107 frame 0 TX packets 14982002 bytes 4367094180 (4.3 GB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 device interrupt 42 memory 0x9e800000-9effffff xilinx@xszgs2:~$ ptp4l -i eno3 -s -m ptp4l[3650610.080]: selected /dev/ptp2 as PTP clock ptp4l[3650610.081]: Failed to open /dev/ptp2: Permission denied failed to create a clock xilinx@xszgs2:~$ sudo ptp4l -i eno3 -s -m ptp4l[3650613.052]: selected /dev/ptp2 as PTP clock ptp4l[3650613.071]: port 1: INITIALIZING to LISTENING on INITIALIZE ptp4l[3650613.071]: port 0: INITIALIZING to LISTENING on INITIALIZE ptp4l[3650613.072]: port 1: link up ptp4l[3650614.597]: port 1: new foreign master 6c92bf.fffe.ccc500-1 ptp4l[3650618.597]: selected best master clock 6c92bf.fffe.ccc500 ptp4l[3650618.597]: port 1: LISTENING to UNCALIBRATED on RS_SLAVE ptp4l[3650620.597]: master offset -496821638515 s0 freq +0 path delay 25928 ptp4l[3650621.597]: master offset -496821663985 s1 freq -25469 path delay 22934 ptp4l[3650622.597]: master offset -3011 s2 freq -28480 path delay 22934 ptp4l[3650622.599]: port 1: UNCALIBRATED to SLAVE on MASTER_CLOCK_SELECTED ptp4l[3650623.596]: master offset 6729 s2 freq -19643 path delay 13071 ptp4l[3650624.596]: master offset -2000 s2 freq -26353 path delay 13071 ptp4l[3650625.596]: master offset -4376 s2 freq -29329 path delay 13297 ptp4l[3650626.596]: master offset -3468 s2 freq -29734 path delay 13071 ptp4l[3650627.596]: master offset -2191 s2 freq -29498 path delay 13071 ptp4l[3650628.596]: master offset -994 s2 freq -28958 path delay 12936 ptp4l[3650629.596]: master offset -435 s2 freq -28697 path delay 12874 ptp4l[3650630.596]: master offset -380 s2 freq -28773 path delay 12874 ptp4l[3650631.596]: master offset -176 s2 freq -28683 path delay 12874 ptp4l[3650632.596]: master offset 161 s2 freq -28398 path delay 12874
在1588 slave的打印中可以看到，PC机上slave报告的master offset和path delay，都远远大于在zcu106之间运行1588的数据。
3. 参考文档
MPSoC Ethernet Macb Driver
