From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from goldrake.enneenne.com (unknown [78.110.190.154]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 50D00B7020 for ; Wed, 30 May 2012 23:12:02 +1000 (EST) Received: from localhost ([127.0.0.1] helo=enneenne.com) by goldrake.enneenne.com with esmtpsa (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.72) (envelope-from ) id 1SZee0-0002gX-DF for linuxppc-dev@lists.ozlabs.org; Wed, 30 May 2012 10:53:11 +0200 Resent-Message-ID: <20120530131123.GF3127@enneenne.com> Date: Wed, 30 May 2012 14:02:57 +0200 From: Rodolfo Giometti Sender: giometti@enneenne.com To: linuxppc-dev@lists.ozlabs.org Message-ID: <20120530120257.GC3127@enneenne.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Subject: Gianfar TX problems List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hello, I'm working on a P1021MDS based board and I have a strange behaviour regarding the TX packets from the gianfar driver (linux 3.0.4-rc5). Rx is working correctly but Tx is not... in particular I noticed that the buffer descriptors are correctly filled but the packets simply do NOT exit form the TSEC (I looked at TSEC's tx counters)! What is puzzling me is that sometimes both TX and RX work correctly but most of the time only Rx is working! Again, testing the same uImage on a Freescale P1021MDS devboard everything works well! Maybe something related to DMA/RAM coherence? Thanks in advance, Rodolfo -- GNU/Linux Solutions e-mail: giometti@enneenne.com Linux Device Driver giometti@linux.it Embedded Systems phone: +39 349 2432127 UNIX programming skype: rodolfo.giometti Freelance ICT Italia - Consulente ICT Italia - www.consulenti-ict.it