From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E9122613E for ; Wed, 7 Jun 2023 07:03:20 +0000 (UTC) Received: from mail-il1-x133.google.com (mail-il1-x133.google.com [IPv6:2607:f8b0:4864:20::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 68DA7124 for ; Wed, 7 Jun 2023 00:03:19 -0700 (PDT) Received: by mail-il1-x133.google.com with SMTP id e9e14a558f8ab-33e53672aa6so440955ab.1 for ; Wed, 07 Jun 2023 00:03:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1686121399; x=1688713399; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date:from:to :cc:subject:date:message-id:reply-to; bh=C0a8avfFzH0/TInQubHB2hVwaExHDjSLG4xvPtND4CU=; b=LHsq68mf95DWCWd++ppuWTiawK11Jry7kEtCzsm76CLPe/e8BlvJvkRpnhDXwE4uVC DQgCPuwAOUeV6NiHCnI8qngt1W25tIhzVTY8WFNsN+QtFnOS83rKn9TS5laMuVP8cviD xQ+hCeVIKtAX3T9aG/Vq89aeihi0jMlY4V3Hsr/N/ZZwq4e8IBdbRKAOUnX3D6W7S70a 1+B3FYjE3b6PPHepe/rE2Tz5PKSEIAa2oI+8/Z1X8Z5qHLIVlPmLK9cKSmTCi2+3FVpK fHs/48u7P1vZJ/prfi2TL3vF9WUgqhKDPQlv1nZ33gZpGIoha5JWobnHrFgNua6daTY/ K7Qg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686121399; x=1688713399; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=C0a8avfFzH0/TInQubHB2hVwaExHDjSLG4xvPtND4CU=; b=ShfYNHvOlt7FCcAdFCdlX98Uhfb2ztg+6tvw8zcm1DvXFDO2jjEnKQKP8G7XIQXMyD WIJj6kjaQOCefe40IcR3jzxAege28OnL2p0vDnFhT7mJkRNgxucMI9bgPoSTlQ4mVNHo fN+eZOLN9cJA8mBVZVHc//G2793eYicraNRzcVLGzl2cbBcyR3ndcljAxod2bes7N5vE kILGLfVDlos3fE4D28nJlM/4OiTmrX31VfZAToWDcxsVnf4Nk068WdjJWFuqHmY2I34a KqaOoGgrzE/9HxssKCgV2EVcpOn8Hhe/RGdkTgX/QGkBewrPUE57dXEYXGLPaoEiNesw +5FQ== X-Gm-Message-State: AC+VfDz/SVs9bi/r/X0ozxoOdBARin+i78j2LThRDXCVgyIr2Dv3ddet nQeb5FcyuaUtny4jq4yinMyd X-Google-Smtp-Source: ACHHUZ5Z9Ml/BXS0Jtc/0C8R9yTDCmZw3x8Y9UsQXo+MWMTYwhb7ZQ2anCJkU2RoEcoOph3aH3fOpA== X-Received: by 2002:a92:dcc8:0:b0:329:bba2:781a with SMTP id b8-20020a92dcc8000000b00329bba2781amr6804865ilr.0.1686121398761; Wed, 07 Jun 2023 00:03:18 -0700 (PDT) Received: from thinkpad ([59.92.97.244]) by smtp.gmail.com with ESMTPSA id f16-20020a63f750000000b00528da88275bsm8423502pgk.47.2023.06.07.00.03.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 07 Jun 2023 00:03:18 -0700 (PDT) Date: Wed, 7 Jun 2023 12:33:13 +0530 From: Manivannan Sadhasivam To: Jakub Kicinski 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 0/3] Add MHI Endpoint network driver Message-ID: <20230607070313.GC5025@thinkpad> References: <20230606123119.57499-1-manivannan.sadhasivam@linaro.org> <20230606142227.4f8fcfee@kernel.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20230606142227.4f8fcfee@kernel.org> X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net On Tue, Jun 06, 2023 at 02:22:27PM -0700, Jakub Kicinski wrote: > On Tue, 6 Jun 2023 18:01:16 +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. > > So the host can talk to the firmware over IP? That's the typical usecase of these PCIe based modems. On the host, mhi_net driver creates the network interface that communicates with the endpoint over MHI host stack. On the endpoint, mhi_ep_net driver creates the network interface that communicates with the host over MHI endpoint stack. These drivers work on top of MHI channels like IP_SW0, IP_HW0 etc... IP_SW0 channel represents the IP communication between host and modem CPUs while IP_HW0 represents IP communication between host and modem DSP. - Mani -- மணிவண்ணன் சதாசிவம்