Re: [PATCH] net: mctp: Add MCTP PCIe VDM transport driver

[Adam Young]

On 7/17/25 03:17, YH Chung wrote:
>  From my perspective, the other MCTP transport drivers do make use of abstraction layers that already exist in the kernel tree. For example, mctp-i3c uses i3c_device_do_priv_xfers(), which ultimately invokes operations registered by the underlying I3C driver. This is effectively an abstraction layer handling the hardware-specific details of TX packet transmission.
>
> In our case, there is no standard interface—like those for I2C/I3C—that serves PCIe VDM. So, the proposed driver tries to introduce a unified interface, defined in mctp-pcie-vdm.h, to provide a reusable interface that allows developers to focus on hardware-specific implementation without needing to duplicate or rework the transport binding logic each time.
>
> Could you kindly share your thoughts or guidance on how the abstraction model used in our PCIe VDM driver compares to the existing abstractions used in I2C/I3C transport implementations?


Would the mailbox abstraction work for this?  It is what I am using in 
the MCTP over PCC code.  Perhaps a PCIe VDM mailbox implementation will 
have a wider use  than just MCTP.