OpenCL: Get PCIe Bus for Intel GPUs

Question

Question: Is there any (Vendor-Specific) way to get the PCIe bus on the Intel graphics card (or get any other unique identifier for the Intel GPU (uniqueness for each vendor)).

I know that I can’t get such information without using Vendor-Specific-Extensions. I know for AMD that with cl_amd_device_topology, I can get this information. And for NVIDIA, I can get it with cl_nv_device_attribute_query and CL_DEVICE_PCI_BUS_ID_NV.

Answer 1

I’m not sure if this is the answer you are looking for, but if you work with Intel GPUs on Linux using the Beigenet platform, then for most (not all, I think Cherryview is an exception), CL_DEVICE_VENDOR_ID returned using clGetDeviceInfo cards for PCIID GPU. See here for implementation and here for comparison.

Using Intel standard drivers on other platforms will require that you match CL_DEVICE_NAME with exiting sysfs or pciutils on Linux, and Win32_DisplayControllerConfiguration.Caption and Win32_Bus.DeviceID on Windows.