On Fri, 2021-01-29 at 18:21 -0800, Jakub Kicinski wrote: > On Wed, 27 Jan 2021 18:01:17 +0100 Loic Poulain wrote: > > MBIM has initially been specified by USB-IF for transporting data > > (IP) > > between a modem and a host over USB. However some modern modems > > also > > support MBIM over PCIe (via MHI). In the same way as QMAP(rmnet), > > it > > allows to aggregate IP packets and to perform context multiplexing. > > > > This change adds minimal MBIM support to MHI, allowing to support > > MBIM > > only modems. MBIM being based on USB NCM, it reuses some helpers > > from > > the USB stack, but the cdc-mbim driver is too USB coupled to be > > reused. > > > > At some point it would be interesting to move on a factorized > > solution, > > having a generic MBIM network lib or dedicated MBIM netlink virtual > > interface support.
What would a kernel-side MBIM netlink interface do? Just data-plane stuff (like channel setup to create new netdevs), or are you thinking about control-plane stuff like APN definition, radio scans, etc? Dan > > This code has been highly inspired from the mhi_mbim downstream > > driver > > (Carl Yin <carl....@quectel.com>). > > > > Signed-off-by: Loic Poulain <loic.poul...@linaro.org> > > Does the existing MBIM over USB NCM also show up as a netdev? > > Let's CC Dan and Bjorn on MBIM-related code, they may have opinions. >
