linux-kernel - Re: [PATCH v2 0/2] Add MHI Endpoint network driver

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Message-ID: <eb4b45ab-1f51-47e9-a286-a9e26461ebed@lunn.ch>
Date:   Wed, 7 Jun 2023 20:13:32 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        davem@...emloft.net, edumazet@...gle.com, pabeni@...hat.com,
        mhi@...ts.linux.dev, linux-arm-msm@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        loic.poulain@...aro.org
Subject: Re: [PATCH v2 0/2] Add MHI Endpoint network driver

On Wed, Jun 07, 2023 at 09:49:22AM -0700, Jakub Kicinski wrote:
> On Wed,  7 Jun 2023 20:54:25 +0530 Manivannan Sadhasivam wrote:
> > This series adds a network driver for the Modem Host Interface (MHI) endpoint
> > devices that provides network interfaces to the PCIe based Qualcomm endpoint
> > devices supporting MHI bus (like Modems). This driver allows the MHI endpoint
> > devices to establish IP communication with the host machines (x86, ARM64) over
> > MHI bus.
> > 
> > On the host side, the existing mhi_net driver provides the network connectivity
> > to the host.
> 
> Why are you posting the next version before the discussion on the
> previous one concluded? :|
> 
> In any case, I'm opposed to reuse of the networking stack to talk
> to firmware. It's a local device. The networking subsystem doesn't
> have to cater to fake networks. Please carry:
> 
> Nacked-by: Jakub Kicinski <kuba@...nel.org>

Remote Processor Messaging (rpmsg) Framework does seem to be what is
supposed to be used for these sorts of situations. Not that i know
much about it.

     Andrew