From: Sasha Neftin <sasha.neftin@intel.com>
To: Andrew Lunn <andrew@lunn.ch>
Cc: "Ruinskiy, Dima" <dima.ruinskiy@intel.com>,
Ricky Wu <en-wei.wu@canonical.com>, <netdev@vger.kernel.org>,
<rickywu0421@gmail.com>, <linux-kernel@vger.kernel.org>,
<edumazet@google.com>, <intel-wired-lan@lists.osuosl.org>,
<kuba@kernel.org>, <anthony.l.nguyen@intel.com>,
<pabeni@redhat.com>, <davem@davemloft.net>,
"Lifshits, Vitaly" <vitaly.lifshits@intel.com>,
naamax.meir <naamax.meir@linux.intel.com>,
"Avivi, Amir" <amir.avivi@intel.com>,
"Keller, Jacob E" <jacob.e.keller@intel.com>,
"Lifshits, Vitaly" <vitaly.lifshits@intel.com>
Subject: Re: [Intel-wired-lan] [PATCH v2 2/2] e1000e: fix link fluctuations problem
Date: Mon, 13 May 2024 09:04:57 +0300 [thread overview]
Message-ID: <d2f49dc7-7218-448c-aea3-d695445c80c7@intel.com> (raw)
In-Reply-To: <5669c185-db96-4ac2-81d5-2198060ae77d@lunn.ch>
On 10/05/2024 15:32, Andrew Lunn wrote:
>>> It would be interesting to see what the link partner sees. What does
>>> it think the I219-LM is advertising? Is it advertising 1000BaseT_Half?
>>
>> i219 parts come with LSI PHY. 1000BASE-T half-duplex is not supported.
>> 1000BASET half-duplex not advertised in IEEE 1000BASE-T Control Register 9.
>
> That is the theory. But in practice? What does the link partner really
> see? I've come across systems which get advertisement wrong. However,
> in that case, i suspect it is the software above the PHY, not the PHY
> itself which was wrong.
>
> Andrew
Not only in the theory. On the link partner IEEE 1000BASE-T Status
Register - Address 10, Link Partner 1000BASE-T Half-Duplex Capability is
0. (1000BAS-T HD not advertised). I believe here is some false positive
indication during the auto-negotiation process.(this is not related to
the link fluctuation)
Sasha
prev parent reply other threads:[~2024-05-13 6:05 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-03 10:18 [PATCH v2 2/2] e1000e: fix link fluctuations problem Ricky Wu
2024-05-07 12:31 ` Andrew Lunn
2024-05-08 5:05 ` [Intel-wired-lan] " Sasha Neftin
2024-05-09 9:13 ` Ruinskiy, Dima
2024-05-09 13:46 ` Andrew Lunn
2024-05-09 17:40 ` En-Wei WU
2024-05-10 9:55 ` Sasha Neftin
2024-05-10 12:32 ` Andrew Lunn
2024-05-13 6:04 ` Sasha Neftin [this message]
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