Re: SRIOV memory allocation

[Peter Teoh <htmldeveloper@xxxxxxxxx>]

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@xxxxxxxxx> 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@xxxxxxxxx> 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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