[dpdk-dev] [PATCH v5] bus/pci: netuio interface for windows

[Tal Shnaiderman]

> Subject: Re: [PATCH v5] bus/pci: netuio interface for windows
> 
> Hi Tal,
> 
> The issue I raised is slightly different: How do we distinguish between
> different GUID_DEVCLASS_NET class devices - those that can support DPDK
> and those that can't?
> 
> For instance, say we have 3 NICs in the system - MLX5 NIC, Intel i40e NIC and
> Intel ice NIC - all loaded with standard ethernet (NDIS) drivers.
> 
> Now if I load and bind the netuio driver to the Intel ice NIC, I have one
> GUID_DEVCLASS_NETUIO class device and two GUID_DEVCLASS_NET class
> devices.
> 
> If I run the pci scan now, it will detect all 3 devices and add them to the list.
> However, the Intel i40e NIC which is correctly detected as a
> GUID_DEVCLASS_NET class and is bound to the standard NDIS driver cannot
> support DPDK and should be excluded from the list.
> 
> I think the suggestion at the community meeting was to define a DEV
> interface which can be queried for confirming DPDK support. In such a case,
> the MLX5 driver should support this interface, where as our standard i40e
> (NDIS) driver will not. This check can be used to exclude this device from the
> list.
> 
> ranjit m.

Thanks for the explanation Ranjit,

BTW, what will happen if a user does tries to use a NETUIO NIC recognized as NET?
It will have nulls for the needed mem_resource fields so will it fails or crash?