From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ente.hachti.de (ente.hachti.de [212.227.83.80]) by ozlabs.org (Postfix) with ESMTP id 2E1AFDDDEA for ; Sun, 17 Aug 2008 05:53:21 +1000 (EST) Received: from [192.168.0.19] (pD955BE3F.dip.t-dialin.net [217.85.190.63]) by ente.hachti.de (Postfix) with ESMTPSA id 96F1333687C for ; Sat, 16 Aug 2008 21:54:16 +0200 (CEST) Message-ID: <48A7302F.8030707@hachti.de> Date: Sat, 16 Aug 2008 21:53:19 +0200 From: Philipp Hachtmann MIME-Version: 1.0 To: linuxppc-embedded@ozlabs.org Subject: U-boot and Xilinx emaclite, TX_PING_PONG -> stops working References: <931ae8260808160434g1ff6d856n46e5e420e487db57@mail.gmail.com> In-Reply-To: <931ae8260808160434g1ff6d856n46e5e420e487db57@mail.gmail.com> Content-Type: text/plain; charset=GB2312 List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi all, I use a Xilinx Virtex-4FX (with powerpc) Board (Ml403) with U-boot and Linux. I am currently wondering if someone has experience with the emaclite driver. When I unset the "ping pong" (double buffering) parameters of the core, I can use it unter Linux and U-boot. But the performance is near to non-functional (wget tells me about 10kByte/sec). Then I switched to double buffering. Now it runs very well - but only under Linux. I found a driver (xilinx_emaclite.c) in the U-boot git. That completely refuses to work correctly (of course with parameters corrected). The other driver I once found "somewhere" (in the Petalinux distribution). It at least worked without the double buffering. Both drivers talk about the ping pong options in their source, so I think they *should* know about it. Does anyone know that problem? Is there an improved driver around? Best wishes, Philipp -- http://www.hachti.de