* Hifive-U vs 1000baseT
@ 2018-10-18 9:40 ` Andreas Schwab
0 siblings, 0 replies; 6+ messages in thread
From: Andreas Schwab @ 2018-10-18 9:40 UTC (permalink / raw)
To: linux-riscv
Are there any known issues with ethernet on the Hifive-U connecting to a
1Gb port? I see that the port gets a link, but no traffic at all. When
connecting to a 100Mb port it works fine.
Andreas.
--
Andreas Schwab, SUSE Labs, schwab at suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
^ permalink raw reply [flat|nested] 6+ messages in thread
* Hifive-U vs 1000baseT
@ 2018-10-18 9:40 ` Andreas Schwab
0 siblings, 0 replies; 6+ messages in thread
From: Andreas Schwab @ 2018-10-18 9:40 UTC (permalink / raw)
To: linux-riscv
Are there any known issues with ethernet on the Hifive-U connecting to a
1Gb port? I see that the port gets a link, but no traffic at all. When
connecting to a 100Mb port it works fine.
Andreas.
--
Andreas Schwab, SUSE Labs, schwab@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Hifive-U vs 1000baseT
@ 2018-10-18 10:21 ` Andreas Schwab
0 siblings, 0 replies; 6+ messages in thread
From: Andreas Schwab @ 2018-10-18 10:21 UTC (permalink / raw)
To: linux-riscv
It turned out that the Gb port is broken, it works fine on a different
Gb port.
Andreas.
--
Andreas Schwab, SUSE Labs, schwab at suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
^ permalink raw reply [flat|nested] 6+ messages in thread
* Hifive-U vs 1000baseT
@ 2018-10-18 17:41 ` Palmer Dabbelt
0 siblings, 0 replies; 6+ messages in thread
From: Palmer Dabbelt @ 2018-10-18 17:41 UTC (permalink / raw)
To: linux-riscv
On Thu, 18 Oct 2018 02:40:17 PDT (-0700), schwab at suse.de wrote:
> Are there any known issues with ethernet on the Hifive-U connecting to a
> 1Gb port? I see that the port gets a link, but no traffic at all. When
> connecting to a 100Mb port it works fine.
That's weird. If anything I'd expect it to be the other way around, with 100Mb
ports not working and 1Gb ports working -- it was that way for a while because
the link type detection is a bit flaky so we just defaulted to 1Gb.
I just checked all the boards we have out on the lab bench, and assuming I
managed to follow through the big tangles of wires correctly everything is at
1Gb. Some early revisions of the boards had a screwed up trace on some of the
1Gb lines that mandated a special cable to un-reverse the pairs, but I don't
think any of those made it out of the lab -- if you send me your serial number
then I'll double-check.
Have you tried more than one ethernet cable?
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Hifive-U vs 1000baseT
@ 2018-10-18 17:41 ` Palmer Dabbelt
0 siblings, 0 replies; 6+ messages in thread
From: Palmer Dabbelt @ 2018-10-18 17:41 UTC (permalink / raw)
To: schwab; +Cc: linux-riscv
On Thu, 18 Oct 2018 02:40:17 PDT (-0700), schwab@suse.de wrote:
> Are there any known issues with ethernet on the Hifive-U connecting to a
> 1Gb port? I see that the port gets a link, but no traffic at all. When
> connecting to a 100Mb port it works fine.
That's weird. If anything I'd expect it to be the other way around, with 100Mb
ports not working and 1Gb ports working -- it was that way for a while because
the link type detection is a bit flaky so we just defaulted to 1Gb.
I just checked all the boards we have out on the lab bench, and assuming I
managed to follow through the big tangles of wires correctly everything is at
1Gb. Some early revisions of the boards had a screwed up trace on some of the
1Gb lines that mandated a special cable to un-reverse the pairs, but I don't
think any of those made it out of the lab -- if you send me your serial number
then I'll double-check.
Have you tried more than one ethernet cable?
_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2018-10-18 17:42 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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2018-10-18 9:40 Hifive-U vs 1000baseT Andreas Schwab
2018-10-18 9:40 ` Andreas Schwab
2018-10-18 10:21 ` Andreas Schwab
2018-10-18 10:21 ` Andreas Schwab
2018-10-18 17:41 ` Palmer Dabbelt
2018-10-18 17:41 ` Palmer Dabbelt
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