netdev - Re: [PATCH 0/2] Migrate QRTR Nameservice to Kernel

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Message-ID: <20200213153007.GA26254@mani>
Date:   Thu, 13 Feb 2020 21:00:08 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Dan Williams <dcbw@...hat.com>
Cc:     davem@...emloft.net, kuba@...nel.org, bjorn.andersson@...aro.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] Migrate QRTR Nameservice to Kernel

Hi Dan,

On Thu, Feb 13, 2020 at 09:22:39AM -0600, Dan Williams wrote:
> On Thu, 2020-02-13 at 14:44 +0530, Manivannan Sadhasivam wrote:
> > Hello,
> > 
> > This patchset migrates the Qualcomm IPC Router (QRTR) Nameservice
> > from userspace
> > to kernel under net/qrtr.
> > 
> > The userspace implementation of it can be found here:
> > https://github.com/andersson/qrtr/blob/master/src/ns.c
> > 
> > This change is required for enabling the WiFi functionality of some
> > Qualcomm
> > WLAN devices using ATH11K without any dependency on a userspace
> > daemon.
> 
> Just out of curiousity, what's the motivation for not requiring a
> userspace daemon? What are the downsides of the current userspace
> daemon implementation?
>

The primary motivation is to eliminate the need for installing and starting
a userspace tool for the basic WiFi usage. This will be critical for the
Qualcomm WLAN devices deployed in x86 laptops.

Also, there are some plans to implement QRTR link negotiation based on this
in future.

Thanks,
Mani
 
> Dan
> 
> > The original userspace code is published under BSD3 license. For
> > migrating it
> > to Linux kernel, I have adapted Dual BSD/GPL license.
> > 
> > This patchset has been verified on Dragonboard410c and Intel NUC with
> > QCA6390
> > WLAN device.
> > 
> > Thanks,
> > Mani
> > 
> > Manivannan Sadhasivam (2):
> >   net: qrtr: Migrate nameservice to kernel from userspace
> >   net: qrtr: Fix the local node ID as 1
> > 
> >  net/qrtr/Makefile |   2 +-
> >  net/qrtr/ns.c     | 730
> > ++++++++++++++++++++++++++++++++++++++++++++++
> >  net/qrtr/qrtr.c   |  51 +---
> >  net/qrtr/qrtr.h   |   4 +
> >  4 files changed, 746 insertions(+), 41 deletions(-)
> >  create mode 100644 net/qrtr/ns.c
> > 
>