From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hector Palacios Date: Wed, 13 Mar 2013 18:14:52 +0100 Subject: [U-Boot] TFTP pause and timeout on MX28 platforms In-Reply-To: <201303131752.20230.marex@denx.de> References: <51404AFE.6000502@digi.com> <201303131719.32450.marex@denx.de> <5140A9ED.7060901@digi.com> <201303131752.20230.marex@denx.de> Message-ID: <5140B40C.7090006@digi.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Dear Marek Vasut, On 03/13/2013 05:52 PM, Marek Vasut wrote: > Dear Hector Palacios, > >> Dear Marek Vasut, >> >> On 03/13/2013 05:19 PM, Marek Vasut wrote: >>> Dear Hector Palacios, >>> >>>> Dear Marek Vasut, >>>> >>>> On 03/13/2013 11:58 AM, Marek Vasut wrote: >>>>> Dear Hector Palacios, >>>>> >>>>>> Hello, >>>>>> >>>>>> When doing large TFTP downloads (files bigger than 10MiB) on my MX28 >>>>>> platform I'm sometimes experiencing pauses and timeouts. U-Boot will >>>>>> eventually restart the transmission and sometimes may successfully >>>>>> complete the download, but other times it won't. >>>>>> On my platform it was somewhat mitigated (but not resolved) by >>>>>> reverting this patch from Marek: >>>>>> >>>>>> commit 67449098a86be18cbdb27345bebe8da57e5d8899 >>>>>> Author: Marek Vasut >>>>>> Date: Wed Aug 29 03:49:50 2012 +0000 >>>>>> >>>>>> FEC: Rework the TX wait mechanism >>>>>> >>>>>> The problem is reproducible in Freescale's MX28EVK. >>>>>> The larger the file, the more chances to see the problem. Please try >>>>>> with 50MiB files or larger. Has anybody else seen it? >>>>>> >>>>>> On an old U-Boot v2009 TFTP transmission was twice slower than with >>>>>> v2013, but didn't suffer from this. >>>>> >>>>> What version of u-boot do you use ? It was resolved in recent versions. >>>> >>>> I'm using v2013.01. >>>> Could you please point me to the commit(s) that solve it? >>>> The commits I see on drivers/net/fec_mxc.c after v2013.01 are from Troy >>>> Kisky and don't seem to address this. >>> >>> commit c0b5a3bbb0cd40a6b23b7b07e2182a5bcdc8c31c >>> Author: Marek Vasut >>> Date: Wed Aug 29 03:49:51 2012 +0000 >>> >>> FEC: Replace magic contants >>> >>> and the three before this one. Is your PHY operating correctly? This >>> fixed the hangs on multiple MX28 platforms for me. >> >> v2013.01 contains all these patches but I was able to reproduce this both >> on my platform and on the mx28evk. >> My problem is not a hang, but TFTP pauses (1 to 3 seconds) and timeouts: >> ################################################################# >> #####################################################T T T T T T >> >> At first I thought it was my platform's PHY (Micrel KSZ8031) but I also see >> it on mx28evk. > > Do you use PHYLIB (see configs/sc_sps_1.h for example)? Also check if your > transceiver mode is not misconfigured. Moreover, see > board/denx/m28evk/spl_boot.c fecmxc_mii_postcall(), maybe you also need to > program some registers of the PHY (V11 and V10 prototypes used KSZ8051)? No I don't use PHYLIB. My platform is based on Freescale's mx28evk (not DENX's m28evk). I saw fecmxc_mii_postcall() and I do a similar thing because of my phy model KSZ8031, but as I said the pauses and timeouts occur in both platforms (mx28evk uses a different PHY: SMSC LAN8720a). Are you able to download a 50MiB file via TFTP several times without any problem on m28evk? Best regards, -- H?ctor Palacios