Yinghai,
Could you help to take a look, we need it in our downstream kernel.
Thanks,
Ethan
On Wed, Nov 6, 2013 at 10:49 PM, ethan.zhao <ethan.ker...@gmail.com> wrote:
> Though no specification about NumVFs register initial value after POST, to
> void the confusion
> lspci output as following before VF was enabled, we should clear the NumVFs
> value left by BIOS
> to zero:
>
> $lspci -vvv -s 03:00.0
> Ethernet controller: Intel Corporation 82599EB 10-Gigabit SFI/SFP+ Network
> Connection (rev 01)
> ~
> Capabilities: [160 v1] Single Root I/O Virtualization (SR-IOV)
> IOVCap: Migration-, Interrupt Message Number: 000
> IOVCtl: Enable+ Migration- Interrupt- MSE+ ARIHierarchy+
> IOVSta: Migration-
> Initial VFs: 64, Total VFs: 64, Number of VFs: 64, Function
> Dependency Link: 00
> ^dazed !
> ~
> Signed-off-by: ethan.zhao <ethan.ker...@gmail.com>
> ---
> drivers/pci/iov.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
> index de8ffac..a4941ad 100644
> --- a/drivers/pci/iov.c
> +++ b/drivers/pci/iov.c
> @@ -439,6 +439,8 @@ static int sriov_init(struct pci_dev *dev, int pos)
>
> found:
> pci_write_config_word(dev, pos + PCI_SRIOV_CTRL, ctrl);
> + /* VF Enable is cleared, so we could init the NumVFs register to 0 */
> + pci_write_config_word(dev, pos + PCI_SRIOV_NUM_VF, 0);
> pci_read_config_word(dev, pos + PCI_SRIOV_VF_OFFSET, &offset);
> pci_read_config_word(dev, pos + PCI_SRIOV_VF_STRIDE, &stride);
> if (!offset || (total > 1 && !stride))
> --
> 1.8.3.4 (Apple Git-47)
>
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