linux-kernel - RE: [E1000-devel] 82571EB: Detected Hardware Unit Hang

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Date:	Mon, 26 Nov 2012 18:06:45 -0800 (PST)
From:	Mary Mcgrath <mary.mcgrath@...cle.com>
To:	Joe Jin <joe.jin@...cle.com>
Cc:	"Dave, Tushar N" <tushar.n.dave@...el.com>, netdev@...r.kernel.org,
	e1000-devel@...ts.sf.net, linux-kernel@...r.kernel.org
Subject: RE: [E1000-devel] 82571EB: Detected Hardware Unit Hang

Joe
Thank you for working this.
I would love to find out how they expect a customer to make the modification
To  "word  0x1A, and see if the 8th bit is 0 or 1, and to change to 0."

I have in turn asked the ct for the lspci command on eth3, maybe the incorrect setting is upstream.

Again,  thank you.
Regards
Mary

-----Original Message-----
From: Joe Jin 
Sent: Monday, November 26, 2012 8:00 PM
To: Fujinaka, Todd
Cc: Dave, Tushar N; netdev@...r.kernel.org; e1000-devel@...ts.sf.net; linux-kernel@...r.kernel.org; Mary Mcgrath
Subject: Re: [E1000-devel] 82571EB: Detected Hardware Unit Hang

On 11/27/12 00:23, Fujinaka, Todd wrote:
> If you look at the previous section, DevCap, you'll see that it's 
> correctly advertising 256 bytes but the system is negotiating 128 for 
> the link to the Ethernet controller. Things on the "other" side of the 
> link are controlled outside of the e1000 driver.
> 
> Tushar's first suggestion was to check the PCIe payload settings in 
> the entire chain. Have you done that? Mismatches will cause hangs.

Hi Todd,

So far I had to know how to modify the maxpayload size, since BIOS have not entry to change this, so I had to use ethtool, now I need to get the offset of MaxPayload size in eeprom, I ever tried to find from Intel online document but failed, any idea?

Thanks in advance,
Joe
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