On 02/05/2018 11:59 AM, S.Y. Park wrote: > Dear Mr. Thompson, > > I'm forwarding to you to the technical discussion mailing list called > "netdev@vger.kernel.org". > > i...@netdevconf.org is for discussions regarding The NetDev Society's > NetDev Conference attendance & participation questions & concerns, > not technical discussion. > > Good luck w/ your 88E6390 driver functionality testing contribution, > and I'm sure someone from the netdev mailing list can address your > question. > > Sincerely, > > Soyoung Park > Executive Director > The NetDev Society > > On Mon, Feb 5, 2018 at 1:09 PM, David Thompson <dthomp...@miovision.com> > wrote: >> Hello, >> >> I am looking for contacts to anyone that is currently working on the Marvell >> 88E6390 port within the Distributed Switch Architecture. I am working >> through a back port to 4.4.38 in a non-trivial integration and have found a >> number of issues I believe are legitimate issues that I would like to >> feedback. I am also seeing a potential issue with outgoing TCP traffic and >> was looking to see if this is a known issue or has been investigated prior. >> I would be very happy to assist in testing the 88E6390 driver functionality. >> >> Details follow: >> >> For my configuration the CPU port is port 6, there is only one 88E6390 and >> finally port 0 and the SERDES are not used. I am also using the GPIO >> bitbang driver for MDIO to the 88E6390 (I've confirmed that it works >> independently). >> >> First, I've noticed a few interesting discrepancies in setup and the >> datasheet for the 88E6390. They are as follows: >> >> CPU Port port control configuration (port 0x6 reg 0x4) is configured 0x3107. >> This indicates >> >> 15:14 SA Filter Disabled >> 9:8 Frame Mode DSA >> 13:12 Egress Mode - is then in an undefined state. According the datasheet >> it must be set to 00. >> >> Global1 Global Control 2 (addr 0x1b reg 0x1c) is configured 0xf000. Bits >> 15:14 only supports 0x0, 0x1, and 0x2 while bits 13:12 are reserved. >> Global1 registers 0x10 -> 0x18 are written 0x0000, 0x0000, 0x5555, 0x5555, >> 0xaaaa, 0xaaaa, 0xffff, and 0xffff. According the 88E6390 datasheet >> 0x10->0x18 are reserved. >> >> >> When I got the back-port compiling and flashed on my target device I was >> able to bring up individual ports (the phy would come up and auto-negotiate >> successfully) but could not send or receive ICMP echo/reply. Making the >> changes associated with 1) above to be in accordance with the Marvell >> datasheet got me to a point where I could send and receive pings. >> >> I now face an interesting problem, I am currently unable to setup or >> maintain a TCP session. Doing a wireshark capture on my host pc to the >> target device (including the 88E6390) with the appropriate port enabled I am >> seeing packet re-transmission issues from the target device. For example, >> if I try to initiate from my host pc I will send a SYN packet and receive >> multiple identical SYN,ACK packets returned or if I initiate from the >> target device I see multiple identical SYN packets sent. I was wondering if >> you had ever seen this anything like this issue and if so had any >> suggestions with regards to what might be the cause? >> >> Much appreciated, >> >> Dave Thompson >> >> David Thompson BSc, MSc >> Chief Systems Architect >> Miovision >> dthomp...@miovision.com >> 519-513-2407 x 225 >> 877-646-8476 (toll-free) >> 519-590-5458 (mobile) >> Web | Blog | LinkedIn | Twitter | Facebook >> >> We’re on to bigger and better things (and spaces)! Please note that >> Miovision’s head office has moved to 137 Glasgow Street, Suite 110, >> Kitchener ON, N2G 4X8. >> >> Miovision | 137 Glasgow Street, Suite 110, Kitchener ON | N2G 4X8 >> >> This e-mail may contain information that is privileged or confidential. If >> you are not the intended recipient, please delete the e-mail and any >> attachments and notify us immediately. Please advise if you require >> reasonable accommodation or assistance. >> >> _______________________________________________ >> info mailing list >> i...@lists.netdevconf.org >> http://lists.netdevconf.org/cgi-bin/mailman/listinfo/info >>
-- Florian
