netdev - Re: [PATCH 0/2] net: usb: qmi_wwan: add qmap mux protocol support

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Message-ID: <f2c10991c8da27f209132efaebfce871@codeaurora.org>
Date:   Fri, 24 Mar 2017 11:45:11 -0600
From:   Subash Abhinov Kasiviswanathan <subashab@...eaurora.org>
To:     Daniele Palmas <dnlplm@...il.com>
Cc:     Bjørn Mork <bjorn@...k.no>,
        linux-usb@...r.kernel.org, netdev@...r.kernel.org,
        netdev-owner@...r.kernel.org
Subject: Re: [PATCH 0/2] net: usb: qmi_wwan: add qmap mux protocol support

On 2017-03-24 07:22, Daniele Palmas wrote:
> This patch adds support for qmap mux protocol available in recent
> Qualcomm based modems.
> 
> The qmap mux protocol can be used for multiplexing data packets in
> order to have multiple ip streams through the same physical device.
> 
> Two new sysfs files are added for adding/removing the qmap mux based
> interfaces (named qmimux):
> 
> /sys/class/net/<iface>/qmi/add_mux
> /sys/class/net/<iface>/qmi/del_mux
> 
> Main patch author is Bjørn Mork <bjorn@...k.no>
> 
> An userspace implementation of the qmi requests needed to support
> multiple ip streams is already available (namely libqmi since
> version 1.18.0).
> 
> The qmap mux feature has been recently implemented in Codeaurora
> gobinet out-of-kernel driver that was the inspiration for this
> development.
> 
> Tests have been performed with Telit LE922A6 (PID 0x1040)
> 
> Daniele Palmas (2):
>   net: usb: qmi_wwan: add qmap mux protocol support
>   Documentation: ABI: testing: sysfs-class-net-qmi: add new qmap mux
>     files description
> 
>  Documentation/ABI/testing/sysfs-class-net-qmi |  27 +++
>  drivers/net/usb/qmi_wwan.c                    | 317 
> +++++++++++++++++++++++++-
>  2 files changed, 343 insertions(+), 1 deletion(-)

Hi Daniele

We are working on something similar
https://www.mail-archive.com/netdev@vger.kernel.org/msg157677.html

We are planning to upstream this as a platform agnostic driver without
tying it to a particular physical transport here.

We also add support for aggregation and flow control (control packet 
0x80)
apart from the multiplexing.

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