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The switch receives management traffic such as STP and LLDP. However, PTP messages are not received, only transmitted. Ideally, the switch would trap all PTP messages to the management CPU. This particular switch has a PTP block which identifies PTP messages and traps them to a dedicated port. There is a register to program this destination. This is not used at the moment. Therefore, program it to the same port as the MGMT traffic is trapped to. This allows to receive PTP messages as soon as timestamping is enabled. In addition, the datasheet mentions that this register is not valid e.g., for 6190 variants. So, add a new PTP operation which is added for the 6390 and 6290 devices. Tested simply like this on Marvell 88E6390, revision 1: |/ # ptp4l -2 -i lan4 --tx_timestamp_timeout=40 -m |[...] |ptp4l[147.450]: master offset 56 s2 freq +1262 path delay 413 |ptp4l[148.450]: master offset 22 s2 freq +1244 path delay 434 |ptp4l[149.450]: master offset 5 s2 freq +1234 path delay 446 |ptp4l[150.451]: master offset 3 s2 freq +1233 path delay 451 |ptp4l[151.451]: master offset 1 s2 freq +1232 path delay 451 |ptp4l[152.451]: master offset -3 s2 freq +1229 path delay 451 |ptp4l[153.451]: master offset 9 s2 freq +1240 path delay 451 Link: https://lore.kernel.org/r/CAFSKS=PJBpvtRJxrR4sG1hyxpnUnQpiHg4SrUNzAhkWnyt9ivg@mail.gmail.com Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Tested-by: Vladimir Oltean <olteanv@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| .. | ||
| chip.c | ||
| chip.h | ||
| devlink.c | ||
| devlink.h | ||
| global1.c | ||
| global1.h | ||
| global1_atu.c | ||
| global1_vtu.c | ||
| global2.c | ||
| global2.h | ||
| global2_avb.c | ||
| global2_scratch.c | ||
| hwtstamp.c | ||
| hwtstamp.h | ||
| Kconfig | ||
| Makefile | ||
| phy.c | ||
| phy.h | ||
| port.c | ||
| port.h | ||
| port_hidden.c | ||
| ptp.c | ||
| ptp.h | ||
| serdes.c | ||
| serdes.h | ||
| smi.c | ||
| smi.h | ||
| switchdev.c | ||
| switchdev.h | ||
| trace.c | ||
| trace.h | ||