From: Alexander Duyck <alexander.h.du...@intel.com>
Hardware-realized virtio_pci devices can implement SR-IOV, so this
patch enables its use. The device in question is an upcoming Intel
NIC that implements both a virtio_net PF and virtio_net VFs. These
are hardware realizations of what has been up to now been a software
interface.
The device in question has the following 4-part PCI IDs:
PF: vendor: 1af4 device: 1041 subvendor: 8086 subdevice: 15fe
VF: vendor: 1af4 device: 1041 subvendor: 8086 subdevice: 05fe
The patch currently needs no check for device ID, because the callback
will never be made for devices that do not assert the capability or
when run on a platform incapable of SR-IOV.
One reason for this patch is because the hardware requires the
vendor ID of a VF to be the same as the vendor ID of the PF that
created it. So it seemed logical to simply have a fully-functioning
virtio_net PF create the VFs. This patch makes that possible.
Signed-off-by: Mark Rustad <mark.d.rus...@intel.com>
Signed-off-by: Alexander Duyck <alexander.h.du...@intel.com>
---
v4: Dropped call to pci_disable_sriov in virtio_pci_remove function
v5: Replaced call to pci_sriov_configure_unmanaged with
pci_sriov_configure_simple
drivers/virtio/virtio_pci_common.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/virtio/virtio_pci_common.c
b/drivers/virtio/virtio_pci_common.c
index 48d4d1cf1cb6..41938d36b0cb 100644
--- a/drivers/virtio/virtio_pci_common.c
+++ b/drivers/virtio/virtio_pci_common.c
@@ -596,6 +596,9 @@ static void virtio_pci_remove(struct pci_dev *pci_dev)
#ifdef CONFIG_PM_SLEEP
.driver.pm = &virtio_pci_pm_ops,
#endif
+#ifdef CONFIG_PCI_IOV
+ .sriov_configure = pci_sriov_configure_simple,
+#endif
};
module_pci_driver(virtio_pci_driver);
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