SRIOV memory allocation
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
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
Quoted 1 line
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.
Quoted 34 lines · J.Hwan Kim
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.cfor (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_______________________________________________
Kernelnewbies mailing list
Kernelnewbies at kernelnewbies.org
http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Signature · 5 lines
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More info:
as indicated from here:
http://communities.intel.com/message/132184#132184
Quoted 59 lines · Peter Teoh
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.
Quoted 25 lines · J.Hwan Kim
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.cfor (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.
Quoted 9 lines
Best Regards,
J.Hwan Kim_______________________________________________
Kernelnewbies mailing list
Kernelnewbies at kernelnewbies.org
http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies--
Regards,
Peter Teoh
Signature · 5 lines
Regards, Peter Teoh -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20120410/ff6088dd/attachment.html