Aw: Re: Re: [PATCH net-next v4 11/11] net: dsa: realtek: rtl8365mb: multiple cpu ports, non cpu extint

Frank Wunderlich
2022-01-11T18:45:44Z

Hi,

> Gesendet: Dienstag, 11. Januar 2022 um 19:17 Uhr
> Von: "Alvin Šipraga" <ALSI@bang-olufsen.dk>

> Luiz, any comments regarding this? I suppose if the chip ID/revision is
> the same for both 67S and 67RB, they should work pretty much the same,
> right?

my phy driver is same for both devices and afaik only do different RX/TX delays. With the chip-rev-patch 0x0020 i can init the switch, but have no technical documentation except the phy driver code.

> Ping working but TCP not working is a bit strange. You could check the
> output of ethtool -S and see if that meets your expectations. If you
> have a relatively modern ethtool you can also append --all-groups to the
> comment to get a more standard output.

as far as i see in tcpdump (suggested by luiz) on target it is a checksum error where checksum is always 0x8382 (maybe some kind of fixed tag).

16:39:07.994825 IP (tos 0x10, ttl 64, id 54002, offset 0, flags [DF], proto TCP (6), length 60)
192.168.1.2.43284 > 192.168.1.1.22: Flags [S], cksum 0x8382 (incorrect -> 0xa6f6), seq 3231275121, win 64240, options [mss 1460,sackOK,TS val 1615921214 ecr 0,nop,wscale 7], length 0
16:39:12.154790 IP (tos 0x10, ttl 64, id 54003, offset 0, flags [DF], proto TCP (6), length 60)
192.168.1.2.43284 > 192.168.1.1.22: Flags [S], cksum 0x8382 (incorrect -> 0x96b6), seq 3231275121, win 64240, options [mss 1460,sackOK,TS val 1615925374 ecr 0,nop,wscale 7], length 0

> You can also try adjusting the RGMII TX/RX delay and pause settings -
> that might help for the R2 where you aren't getting any packets
> through.

r2pro i got working by setting both delays to 0 as phy-driver does the same (after some calculation).

on r64 this is a bit more tricky, because the phy driver uses tx=1 and rx=3 with this calculation for reg-value

regData = (regData & 0xFFF0) | ((txDelay << 3) & 0x0008) | (rxDelay & 0x0007);

but in dts i need the values in picosends (?) and here i do not know how to calculate them

regards Frank