From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AFE22C77B7A for ; Wed, 7 Jun 2023 17:44:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231979AbjFGRoL (ORCPT ); Wed, 7 Jun 2023 13:44:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43622 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232130AbjFGRoK (ORCPT ); Wed, 7 Jun 2023 13:44:10 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 80B6C1FCF; Wed, 7 Jun 2023 10:43:53 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 2D836616A8; Wed, 7 Jun 2023 17:43:52 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2FBDCC433D2; Wed, 7 Jun 2023 17:43:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1686159831; bh=pZcTVLLiIRL735nUNe2nRR+4NmAQlsIK40zLI6qlujk=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=si6CZLulOOFQBwBLvCrGPujNsZgJJv/o7yK0rUP061dgsOcNkqrtpIFMXnEBrHssV vksE/O1f8ba1i6P8FaMH41D2MBI2e1xzfrsocFKuRcY+AMFSq9ZOFyl+/+MohsfCjG LqWncXg5pnJSlsfUnC2ECdCdDpRGn+RHw85Zv/C2FgSaKdbOieW5yf5iGQzeeqNG0+ EgudZmd16HbPkMVmNTjYX+F5Kft7RBWe7QP3bFHSY8yP/6vR8ayv/66yOEfriHqMYY zZEZnav0PSAgb7IB+pG0bw7n8/vL/Rv1toWKRgHUfxqL7xOphTlctNJ0gQIuxMbdjy gJD5Pw6uPfJUw== Date: Wed, 7 Jun 2023 10:43:50 -0700 From: Jakub Kicinski To: Manivannan Sadhasivam Cc: davem@davemloft.net, edumazet@google.com, pabeni@redhat.com, mhi@lists.linux.dev, linux-arm-msm@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, loic.poulain@linaro.org Subject: Re: [PATCH v2 0/2] Add MHI Endpoint network driver Message-ID: <20230607104350.03a51711@kernel.org> In-Reply-To: <20230607171153.GA109456@thinkpad> References: <20230607152427.108607-1-manivannan.sadhasivam@linaro.org> <20230607094922.43106896@kernel.org> <20230607171153.GA109456@thinkpad> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org On Wed, 7 Jun 2023 22:41:53 +0530 Manivannan Sadhasivam wrote: > > 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 > > > > if there are future submissions. > > Why shouldn't it be? With this kind of setup one could share the data connectivity > available in the device with the host over IP tunneling. If the IP source in the > device (like modem DSP) has no way to be shared with the host, then those IP > packets could be tunneled through this interface for providing connectivity to > the host. > > I believe this is a common usecase among the PCIe based wireless endpoint > devices. We can handwave our way into many scenarios and terrible architectures. I don't see any compelling reason to merge this.