The device needs to set the Bus Master Enable bit so that it can initiate DMA transactions. Without it set, it isn't really functional.
If leaving that bit cleared lets you function, I would think it's more of an issue with the root complex or associated bridges than the device itself. It's possible it's an issue with the I210 you have, so another option could be to try another I210. In either case, you really should be contacting your hardware suppliers for support. Cheers, Matthew From: shiv prakash Agarwal <chhotu.s...@gmail.com<mailto:chhotu.s...@gmail.com>> Date: Thursday, April 24, 2014 at 10:38 PM To: Matthew Vick <matthew.v...@intel.com<mailto:matthew.v...@intel.com>> Cc: Carolyn Wyborny <carolyn.wybo...@intel.com<mailto:carolyn.wybo...@intel.com>>, "Rose, Gregory V" <gregory.v.r...@intel.com<mailto:gregory.v.r...@intel.com>>, "Kirsher, Jeffrey T" <jeffrey.t.kirs...@intel.com<mailto:jeffrey.t.kirs...@intel.com>>, "e1000-devel@lists.sourceforge.net<mailto:e1000-devel@lists.sourceforge.net>" <e1000-devel@lists.sourceforge.net<mailto:e1000-devel@lists.sourceforge.net>> Subject: Re: ARM support for igb driver Thanks Matthew, On furthur debug, I found that this hang happening on enabling Bus Master Enable bit(bit 2) of command register (offset 0x4) in config space. On disabling this bit, no hang occurs. Any idea on this behaviour? On Thu, Apr 24, 2014 at 11:51 PM, Vick, Matthew <matthew.v...@intel.com<mailto:matthew.v...@intel.com>> wrote: (Top-posting, I know, sorry! I'm adding e1000-devel, our support list for these kinds of inquiries.) It looks like you have a problem at the platform level with a PCI bridge, rather than a problem with our NIC. I think the right next step would be to contact your hardware vendor for your system. Cheers, Matthew From: shiv prakash Agarwal <chhotu.s...@gmail.com<mailto:chhotu.s...@gmail.com>> Date: Thursday, April 24, 2014 at 6:38 AM To: Matthew Vick <matthew.v...@intel.com<mailto:matthew.v...@intel.com>>, Carolyn Wyborny <carolyn.wybo...@intel.com<mailto:carolyn.wybo...@intel.com>>, "Rose, Gregory V" <gregory.v.r...@intel.com<mailto:gregory.v.r...@intel.com>>, "Kirsher, Jeffrey T" <jeffrey.t.kirs...@intel.com<mailto:jeffrey.t.kirs...@intel.com>> Subject: ARM support for igb driver Hi All, I am using below Intel I210 NIC card using igb driver on ARM http://www.intel.com/content/www/us/en/ethernet-controllers/ethernet-controller-i210-i211-family.html But during configuration stage, it hangs as soon as we do write access to device configuration space. Has anybody tested Intel I210 NIC card using igb driver on ARM? Any idea on above behaviour, log is below: PCI host bridge to bus 0000:00 pci_bus 0000:00: root bus resource [mem 0x32100000-0x3fffffff] pci_bus 0000:00: root bus resource [mem 0x12100000-0x320fffff pref] pci_bus 0000:00: root bus resource [io 0x1000-0xffff] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff] pci 0000:00:00.0: [10de:0e12] type 01 class 0x060400 pci 0000:00:00.0: PME# supported from D0 D1 D2 D3hot D3cold PCI: bus0: Fast back to back transfers disabled pci 0000:00:00.0: bridge configuration invalid ([bus 00-00]), reconfiguring pci 0000:01:00.0: [8086:1533] type 00 class 0x020000 pci 0000:01:00.0: reg 10: [mem 0x00000000-0x000fffff] Unhandled fault: imprecise external abort (0x1406) at 0x00000000 Internal error: : 1406 [#1] PREEMPT SMP ARM Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.10.24 #2 task: ef06fa40 ti: ef0b2000 task.ti: ef0b2000 ------------------------------------------------------------------------------ Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
