From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from metis.extern.pengutronix.de (metis.extern.pengutronix.de [83.236.181.26]) by ozlabs.org (Postfix) with ESMTP id AD9EBDE7AC for ; Tue, 26 Aug 2008 16:18:49 +1000 (EST) Date: Tue, 26 Aug 2008 08:18:41 +0200 From: Wolfram Sang To: Gary Thomas Subject: Re: MPC5200 FEC problems Message-ID: <20080826061841.GA4253@pengutronix.de> References: <48B2D167.40008@mlbassoc.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="8t9RHnE3ZwKMSgU+" In-Reply-To: <48B2D167.40008@mlbassoc.com> Cc: linuxppc-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , --8t9RHnE3ZwKMSgU+ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hello Gary, On Mon, Aug 25, 2008 at 09:36:07AM -0600, Gary Thomas wrote: > I'm adding the Analogue & Micro Boa (MPC5200/B) platform to the > public 2.6.26 tree. Under heavy network load (sometimes even > not so heavy!), I get this error: > net eth0: FEC_IEVENT_RFIFO_ERROR Yeah, I know this one :( > My question is - what exactly does this error imply? Looking at > the MPC5200 manual doesn't give much info - just that there was > a Rx FIFO error. In deed, the manual seems not very helpful. The description of the set FIFO status bit did not help me that much. > I'm also perplexed by the fact that I have two slightly different > Boa boards (same CPU rev, speed, etc). About the only thing that's > different is the SDRAM setup. One board is rock solid while the > other gets this error almost immediately. I'm not sure if this is really of importance, but do the boards have different PHYs? > Note that I don't have any trouble with this platform running RedBoot > or eCos, just Linux :-( Try this patch and please report if it worked for you: http://www.nabble.com/-PATCH--MPC52XX:-Don't-touch-pipelining-for-MPC5200B-= td19028341.html All the best, Wolfram --=20 Dipl.-Ing. Wolfram Sang | http://www.pengutronix.de Pengutronix - Linux Solutions for Science and Industry --8t9RHnE3ZwKMSgU+ Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFIs6BBD27XaX1/VRsRAlQBAJ4xKlXy5IMJj4dDob9BcJZFyDyU5ACgvexH UQ7Y3mWFg7AZ/IRU8M0re5g= =LnWY -----END PGP SIGNATURE----- --8t9RHnE3ZwKMSgU+--