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vfio: Introduce function to get vfio dev path

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This function will be later used to get the vfio dev path.

Signed-off-by: Archana Shinde <archana.m.shinde@intel.com>
This commit is contained in:
Archana Shinde 2023-12-06 21:29:20 -08:00
parent 1e304e6307
commit c6390f2a2a
1 changed files with 11 additions and 7 deletions
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18
src/runtime/pkg/device/drivers/vfio.go
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@ -268,6 +268,16 @@ func GetBDF(deviceSysStr string) string {
return tokens[1]
}
func GetVFIODevPath(bdf string) (string, error) {
// Determine the iommu group that the device belongs to.
groupPath, err := os.Readlink(fmt.Sprintf(iommuGroupPath, bdf))
if err != nil {
return "", err
}
return fmt.Sprintf(vfioDevPath, filepath.Base(groupPath)), nil
}
// BindDevicetoVFIO binds the device to vfio driver after unbinding from host
// driver if present.
// Will be called by a network interface or a generic pcie device.
@ -306,13 +316,7 @@ func BindDevicetoVFIO(bdf, hostDriver string) (string, error) {
return "", err
}
// Determine the iommu group that the device belongs to.
groupPath, err := os.Readlink(fmt.Sprintf(iommuGroupPath, bdf))
if err != nil {
return "", err
}
return fmt.Sprintf(vfioDevPath, filepath.Base(groupPath)), nil
return GetVFIODevPath(bdf)
}
// BindDevicetoHost unbinds the device from vfio-pci driver and binds it to the