From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marek Vasut Date: Sun, 27 Apr 2014 20:08:50 +0200 Subject: [U-Boot] [PATCH v3 9/9] net/designware: Reduce DMA burst length In-Reply-To: References: <1397844323.19277.26.camel@hastur.hellion.org.uk> <1398612332.19277.116.camel@hastur.hellion.org.uk> Message-ID: <201404272008.50958.marex@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On Sunday, April 27, 2014 at 05:29:29 PM, Chen-Yu Tsai wrote: > On Sun, Apr 27, 2014 at 11:25 PM, Ian Campbell wrote: > > On Sat, 2014-04-26 at 20:28 +0200, Marek Vasut wrote: > >> On Friday, April 18, 2014 at 08:05:50 PM, Ian Campbell wrote: > >> > From: Jens Kuske > >> > > >> > The GMAC module in Allwinner sunxi SoCs seems to have problems with > >> > burst lengths > 8. > >> > >> Is there any explanation for the problems please ? > > > > Jens or Wens, can you answer this? > > IIRC, with burst lengths > 8, GMAC doesn't work, no ping, no DHCP. > I don't remember if it was TX or RX that suffered, or even both. > > Hope this clarifies things a bit. No, it does not at all, sorry. What you describe are symptoms, but what I want to know is what is the root cause of those symptoms. You did not explain that. Best regards, Marek Vasut