[net-next,v2,0/2] net: mhi: move MBIM to WWAN

Message

Loic Poulain Aug. 3, 2021, 1:36 p.m. UTC

Implement a proper WWAN driver for MBIM network protocol, with multi link
management supported through the WWAN framework (wwan rtnetlink).

Until now, MBIM over MHI was supported directly in the mhi_net driver, via
some protocol rx/tx fixup callbacks, but with only one session supported
(no multilink muxing). We can then remove that part from mhi_net and restore
the driver to a simpler version for 'raw' ip transfer (or QMAP via rmnet link).

Note that a wwan0 link is created by default for session-id 0. Additional links
can be managed via ip tool:

    $ ip link add dev wwan0mms parentdev wwan0 type wwan linkid 1

Changes in v2:
- Fix warnings reported with `make W=1 C=1`
- Add missing rcu_read lock/unlock for mbim links access

Loic Poulain (2):
  net: wwan: Add MHI MBIM network driver
  net: mhi: Remove MBIM protocol

 drivers/net/Kconfig              |   4 +-
 drivers/net/Makefile             |   2 +-
 drivers/net/mhi/Makefile         |   3 -
 drivers/net/mhi/mhi.h            |  41 ---
 drivers/net/mhi/net.c            | 487 -----------------------------
 drivers/net/mhi/proto_mbim.c     | 310 -------------------
 drivers/net/mhi_net.c            | 418 +++++++++++++++++++++++++
 drivers/net/wwan/Kconfig         |  12 +
 drivers/net/wwan/Makefile        |   1 +
 drivers/net/wwan/mhi_wwan_mbim.c | 648 +++++++++++++++++++++++++++++++++++++++
 10 files changed, 1082 insertions(+), 844 deletions(-)
 delete mode 100644 drivers/net/mhi/Makefile
 delete mode 100644 drivers/net/mhi/mhi.h
 delete mode 100644 drivers/net/mhi/net.c
 delete mode 100644 drivers/net/mhi/proto_mbim.c
 create mode 100644 drivers/net/mhi_net.c
 create mode 100644 drivers/net/wwan/mhi_wwan_mbim.c