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nvmdev: Add GetPhysicalFunction() for both Device and ParentDevice

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Signed-off-by: Christopher Desiniotis <cdesiniotis@nvidia.com>
This commit is contained in:
Christopher Desiniotis 2022-08-23 16:03:28 -07:00
parent 6ff7845b92
commit bccac280ca
2 changed files with 34 additions and 3 deletions
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19
pkg/nvmdev/nvmdev.go
View File

@ -319,6 +319,25 @@ func (m *Device) Delete() error {
return nil return nil
} }
// GetPhysicalFunction gets the physical PCI device backing a 'parent' device
func (p *ParentDevice) GetPhysicalFunction() (*nvpci.NvidiaPCIDevice, error) {
if !p.IsVF {
return p.NvidiaPCIDevice, nil
}
physfnPath, err := filepath.EvalSymlinks(path.Join(p.Path, "physfn"))
if err != nil {
return nil, fmt.Errorf("unable to resolve %s: %v", path.Join(p.Path, "physfn"), err)
}
return nvpci.NewDevice(physfnPath)
}
// GetPhysicalFunction gets the physical PCI device that a vGPU is created on
func (m *Device) GetPhysicalFunction() (*nvpci.NvidiaPCIDevice, error) {
return m.Parent.GetPhysicalFunction()
}
// IsMDEVTypeSupported checks if the mdevType is supported by the GPU // IsMDEVTypeSupported checks if the mdevType is supported by the GPU
func (p *ParentDevice) IsMDEVTypeSupported(mdevType string) bool { func (p *ParentDevice) IsMDEVTypeSupported(mdevType string) bool {
_, found := p.mdevPaths[mdevType] _, found := p.mdevPaths[mdevType]

18
pkg/nvmdev/nvmdev_test.go
View File

@ -33,6 +33,11 @@ func TestNvmdev(t *testing.T) {
require.Equal(t, 1, len(parentDevs), "Wrong number of parent GPU devices") require.Equal(t, 1, len(parentDevs), "Wrong number of parent GPU devices")
parentA100 := parentDevs[0] parentA100 := parentDevs[0]
pf, err := parentA100.GetPhysicalFunction()
require.Nil(t, err, "Error getting physical function backing the Mock A100 parent device")
require.Equal(t, "0000:3b:04.1", pf.Address, "Wrong address for Mock A100 physical function")
supported := parentA100.IsMDEVTypeSupported("A100-4C") supported := parentA100.IsMDEVTypeSupported("A100-4C")
require.True(t, supported, "A100-4C should be a supported vGPU type") require.True(t, supported, "A100-4C should be a supported vGPU type")
@ -46,7 +51,14 @@ func TestNvmdev(t *testing.T) {
mdevs, err := nvmdev.GetAllDevices() mdevs, err := nvmdev.GetAllDevices()
require.Nil(t, err, "Error getting NVIDIA MDEV (vGPU) devices") require.Nil(t, err, "Error getting NVIDIA MDEV (vGPU) devices")
require.Equal(t, 1, len(mdevs), "Wrong number of NVIDIA MDEV (vGPU) devices") require.Equal(t, 1, len(mdevs), "Wrong number of NVIDIA MDEV (vGPU) devices")
require.Equal(t, "A100-4C", mdevs[0].MDEVType, "Wrong value for mdev_type")
require.Equal(t, "vfio_mdev", mdevs[0].Driver, "Wrong driver detected for mdev device") mdevA100 := mdevs[0]
require.Equal(t, 200, mdevs[0].IommuGroup, "Wrong value for iommu_group")
require.Equal(t, "A100-4C", mdevA100.MDEVType, "Wrong value for mdev_type")
require.Equal(t, "vfio_mdev", mdevA100.Driver, "Wrong driver detected for mdev device")
require.Equal(t, 200, mdevA100.IommuGroup, "Wrong value for iommu_group")
pf, err = mdevA100.GetPhysicalFunction()
require.Nil(t, err, "Error getting the physical function for Mock A100 mediated device")
require.Equal(t, "0000:3b:04.1", pf.Address, "Wrong address for Mock A100 physical function")
} }