How do you get PCIe bus/device/function from a \\.\SCSI handle?

Question

I have a \\.\SCSI#: handle created via CreateFile(). I know it points to a specific HBA or (in my case) NVMe Controller. It must have a Bus/Device/Function associated with it's enumeration.

So far I've tried to figure this out via wmi, though I'm more than open to a C solution via WinApi. (actually would prefer a solution in C).

By getting an object using:

gwmi -namespace root\cimv2 -class Win32_SCSIController  | format-list *

It yields my NVMe device like so:

PSComputerName              : DESK
Status                      : OK
Name                        : Standard NVM Express Controller
StatusInfo                  : 3
__GENUS                     : 2
__CLASS                     : Win32_SCSIController
__SUPERCLASS                : CIM_SCSIController
__DYNASTY                   : CIM_ManagedSystemElement
__RELPATH                   : Win32_SCSIController.DeviceID="PCI\\VEN_1987&DEV_5008&SUBSYS_50081987&REV_01\\4&CB74546&0&00E8"
__PROPERTY_COUNT            : 31
__DERIVATION                : {CIM_SCSIController, CIM_Controller, CIM_LogicalDevice, CIM_LogicalElement...}
__SERVER                    : DESK
__NAMESPACE                 : root\cimv2
__PATH                      : \\DESK\root\cimv2:Win32_SCSIController.DeviceID="PCI\\VEN_1987&DEV_5008&SUBSYS_50081987&REV_01\\4&CB74546&0&00E8"
Availability                : 3
Caption                     : Standard NVM Express Controller
ConfigManagerErrorCode      : 0
ConfigManagerUserConfig     : False
ControllerTimeouts          :
CreationClassName           : Win32_SCSIController
Description                 : Standard NVM Express Controller
DeviceID                    : PCI\VEN_1987&DEV_5008&SUBSYS_50081987&REV_01\4&CB74546&0&00E8
DeviceMap                   :
DriverName                  : stornvme
ErrorCleared                :
ErrorDescription            :
HardwareVersion             :
Index                       :
InstallDate                 :
LastErrorCode               :
Manufacturer                : Standard NVM Express Controller
MaxDataWidth                :
MaxNumberControlled         :
MaxTransferRate             :
PNPDeviceID                 : PCI\VEN_1987&DEV_5008&SUBSYS_50081987&REV_01\4&CB74546&0&00E8
PowerManagementCapabilities :
PowerManagementSupported    :
ProtectionManagement        :
ProtocolSupported           : 2
SystemCreationClassName     : Win32_ComputerSystem
SystemName                  : DESK
TimeOfLastReset             :
Scope                       : System.Management.ManagementScope
Path                        : \\DESK\root\cimv2:Win32_SCSIController.DeviceID="PCI\\VEN_1987&DEV_5008&SUBSYS_50081987&REV_01\\4&CB74546&0&00E8"
Options                     : System.Management.ObjectGetOptions
ClassPath                   : \\DESK\root\cimv2:Win32_SCSIController
Properties                  : {Availability, Caption, ConfigManagerErrorCode, ConfigManagerUserConfig...}
SystemProperties            : {__GENUS, __CLASS, __SUPERCLASS, __DYNASTY...}
Qualifiers                  : {dynamic, Locale, provider, UUID}
Site                        :                     :

Notice how the Index is blank... I figured that this would have been the number in \.\SCSI#:

Playing a little more, I can get the Bus/Device/Function from this:

$a = gwmi -namespace root\cimv2 -class Win32_PnPEntity -filter "DeviceId='PCI\\VEN_1987&DEV_5008&SUBSYS_50081987&REV_01\\4&CB74546&0&00E8'"

$a.GetDeviceProperties('DEVPKEY_Device_LocationInfo').deviceProperties.Data
PCI bus 5, device 0, function 0

I also thought about calling IOCTL_SCSI_GET_ADDRESS on the \\.\SCSI#: handle, though that doesn't work (which sort of makes sense since it isn't a lun-handle, but rather a controller one)

How do I associate a PCIe Bus/Device/Function info with the \\.\SCSI#: handle?