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[Xen-devel] about sr-iov

To: <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-devel] about sr-iov
From: "Zhuo Song" <alfred.z.song@xxxxxxxxx>
Date: Wed, 24 Nov 2010 21:16:50 +0800
Cc: yu.zhao@xxxxxxxxx
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I got a problem when prepared to pass-thru 82576 ethernet card with SR-IOV support.


The 82576 card is build-in on the board. When loading igb driver for the card, dmesg show some errors like:


pci 0000:05:00.0: BAR 10: can't allocate mem resource [0xfbf00000-0xfbefffff]

igb 0000:05:00.0: not enough MMIO resources for SR-IOV

igb 0000:05:00.0: Failed to initialize SR-IOV virtualization


Some system information from DMI as below:


XEN 4.0.0, DOM0 kernel 2.6.32, igb driver 2.2.9


System Information

        Manufacturer: HP

        Product Name: ProLiant DL160 G6 


BIOS Information

        Vendor: HP

        Version: O33

        Release Date: 06/10/2009

        Address: 0xF0000

        Runtime Size: 64 kB

        ROM Size: 2048 kB

        BIOS Revision: 8.15


LAN option rom, the version is intel agent boot GE 1.3.24, PXE2.1


Processor Information

        Socket Designation: Proc 2

        Type: Central Processor

        Family: Xeon

        Manufacturer: Intel           

        Signature: Type 0, Family 6, Model 26, Stepping 5

Version: Intel(R) Xeon(R) CPU           E5504  @ 2.00GHz


The same igb driver works well on a dell server with 82576 adapter. I thought BIOS got some problem to assign right memory for VFs and I tried to pass *pci=assign-busses* to kernel, but it still failed. Does the 82576 card SR-IOV need a BIOS enable and a *REBOOT* to make the function active?  Can anyone just give me some ideas? Thanks.


Best Regards


Zhuo Song

Gif me a visky, ginger ale on the side.


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