Hello Ricardo, On Fri, May 6, 2022 at 4:16 AM Ricardo Martinez <ricardo.martinez@xxxxxxxxxxxxxxx> wrote: > t7xx is the PCIe host device driver for Intel 5G 5000 M.2 solution which > is based on MediaTek's T700 modem to provide WWAN connectivity. > The driver uses the WWAN framework infrastructure to create the following > control ports and network interfaces: > * /dev/wwan0mbim0 - Interface conforming to the MBIM protocol. > Applications like libmbim [1] or Modem Manager [2] from v1.16 onwards > with [3][4] can use it to enable data communication towards WWAN. > * /dev/wwan0at0 - Interface that supports AT commands. > * wwan0 - Primary network interface for IP traffic. > > The main blocks in t7xx driver are: > * PCIe layer - Implements probe, removal, and power management callbacks. > * Port-proxy - Provides a common interface to interact with different types > of ports such as WWAN ports. > * Modem control & status monitor - Implements the entry point for modem > initialization, reset and exit, as well as exception handling. > * CLDMA (Control Layer DMA) - Manages the HW used by the port layer to send > control messages to the modem using MediaTek's CCCI (Cross-Core > Communication Interface) protocol. > * DPMAIF (Data Plane Modem AP Interface) - Controls the HW that provides > uplink and downlink queues for the data path. The data exchange takes > place using circular buffers to share data buffer addresses and metadata > to describe the packets. > * MHCCIF (Modem Host Cross-Core Interface) - Provides interrupt channels > for bidirectional event notification such as handshake, exception, PM and > port enumeration. > > The compilation of the t7xx driver is enabled by the CONFIG_MTK_T7XX config > option which depends on CONFIG_WWAN. > This driver was originally developed by MediaTek. Intel adapted t7xx to > the WWAN framework, optimized and refactored the driver source code in close > collaboration with MediaTek. This will enable getting the t7xx driver on the > Approved Vendor List for interested OEM's and ODM's productization plans > with Intel 5G 5000 M.2 solution. > > List of contributors: > Amir Hanania <amir.hanania@xxxxxxxxx> > Andriy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> > Chandrashekar Devegowda <chandrashekar.devegowda@xxxxxxxxx> > Dinesh Sharma <dinesh.sharma@xxxxxxxxx> > Eliot Lee <eliot.lee@xxxxxxxxx> > Haijun Liu <haijun.liu@xxxxxxxxxxxx> > M Chetan Kumar <m.chetan.kumar@xxxxxxxxx> > Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> > Moises Veleta <moises.veleta@xxxxxxxxx> > Pierre-louis Bossart <pierre-louis.bossart@xxxxxxxxx> > Chiranjeevi Rapolu <chiranjeevi.rapolu@xxxxxxxxx> > Ricardo Martinez <ricardo.martinez@xxxxxxxxxxxxxxx> > Madhusmita Sahu <madhusmita.sahu@xxxxxxxxx> > Muralidharan Sethuraman <muralidharan.sethuraman@xxxxxxxxx> > Soumya Prakash Mishra <Soumya.Prakash.Mishra@xxxxxxxxx> > Sreehari Kancharla <sreehari.kancharla@xxxxxxxxx> > Suresh Nagaraj <suresh.nagaraj@xxxxxxxxx> > > [1] https://www.freedesktop.org/software/libmbim/ > [2] https://www.freedesktop.org/software/ModemManager/ > [3] https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/merge_requests/582 > [4] https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/merge_requests/523 Now the driver looks really nice. Good job! -- Sergey
