SRIOV memory allocation

[Peter Teoh]

More info:

http://communities.intel.com/community/wired/blog/2011/01/19/come-and-get-it-sr-iov-primer-document-updated

as indicated from here:

http://communities.intel.com/message/132184#132184

On Tue, Apr 10, 2012 at 12:15 AM, Peter Teoh <htmldeveloper at gmail.com>wrote:

> Is your system 32bit or 64bit?   Before putting the card, there was no
> memory problem right?
>
> And after putting in the card, memory resources all get used up right (by
> IOV)?   It looked like it is similar to this problem:
>
> http://communities.intel.com/thread/23318
>
> From above and here:
>
> http://www.mjmwired.net/kernel/Documentation/PCI/pci-iov-howto.txt
>
> it seemed that this hardware feature requires BIOS support, and so if ur
> hardware does not have it, SR-IOV is not possible, thus giving rise to
> those errors u have seen.
>
> On Sat, Apr 7, 2012 at 4:11 PM, J.Hwan Kim <frog1120 at gmail.com> wrote:
>
>> Hi, everyone
>>
>> I'd like to know what routine of the PCIe allocates SR-IOV BAR memory.
>>
>> When I put into the network card supporting SR-IOV in my system,
>> it returns error indicating "MMIO resource" is insufficient when sriov
>> is enabled.
>>
>> The routine is in iov.c
>>
>> for (i = 0; i < PCI_SRIOV_NUM_BARS/*6*/; i++) {
>>         res = dev->resource + PCI_IOV_RESOURCES + i;
>>         if (res->parent)
>>             nres++;
>> }
>> if (nres != iov->nres) {
>>       dev_err(&dev->dev, "not enough MMIO resources for SR-IOV\n");
>>       return -ENOMEM;
>> }
>>
>> So, I hope to know where the resources of IOV is assigned the parent
>> pointer.
>>
>> Thanks in advance.
>>
>> Best Regards,
>> J.Hwan Kim
>>
>>
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>>
>
>
>
> --
> Regards,
> Peter Teoh
>



-- 
Regards,
Peter Teoh
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