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 5F5D7C54EE9 for ; Tue, 20 Sep 2022 13:45:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230352AbiITNpN (ORCPT ); Tue, 20 Sep 2022 09:45:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32936 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231372AbiITNo7 (ORCPT ); Tue, 20 Sep 2022 09:44:59 -0400 Received: from mx07-00178001.pphosted.com (mx08-00178001.pphosted.com [91.207.212.93]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9BC8F616E; Tue, 20 Sep 2022 06:44:47 -0700 (PDT) Received: from pps.filterd (m0046660.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 28KBbDPJ032460; Tue, 20 Sep 2022 15:44:33 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h=message-id : date : mime-version : from : subject : to : cc : references : in-reply-to : content-type : content-transfer-encoding; s=selector1; bh=tKe93jKTJuGPYc8RLIZ+qGFMxQwQpY6C7yIqnX+fRxc=; b=3Z8juWDfqMB6uBZiRAmuQEJVJVqtZQwkwDpAKixcN9ZBy3PaiYllzdotzthgYeSuiaIf jwJ6Z+5tWS4ksM+tmbRXKhglAuW5oJ4qMhenR/t5/EArZAUV3xchypYt9OuxPvceAu3I Py+oO79NY5xeFwjbxXHPLm3BBXt30h0HXr3QZvmYQ7eDQ9Bj055HoJFPh92zVPl1I1rT uTyslkzuIPalm8HM9KujmDhqCflYHaUQmboZOh7AoO1WEGGPnDV6VIJ29kaNul25CaR4 rwUk1xLW0eUmUd5fl46SrmPji53X/OmXPZiM/6K6pTDfg+H07oWShx47fCzPlokkHSXT 3w== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 3jn6a0u8mp-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 20 Sep 2022 15:44:33 +0200 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id D605210002A; Tue, 20 Sep 2022 15:44:31 +0200 (CEST) Received: from Webmail-eu.st.com (shfdag1node2.st.com [10.75.129.70]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 54D5123300B; Tue, 20 Sep 2022 15:44:31 +0200 (CEST) Received: from [10.201.22.245] (10.75.127.44) by SHFDAG1NODE2.st.com (10.75.129.70) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2375.31; Tue, 20 Sep 2022 15:44:30 +0200 Message-ID: <66e27df5-7697-446d-df7c-eb50e6d06f46@foss.st.com> Date: Tue, 20 Sep 2022 15:44:18 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 From: Arnaud POULIQUEN Subject: Re: [PATCH v8 0/4] remoteproc: restructure the remoteproc VirtIO device To: Mathieu Poirier CC: Bjorn Andersson , , , , Rob Herring , Christoph Hellwig , Stefano Stabellini , Bruce Ashfield References: <20220826115232.2163130-1-arnaud.pouliquen@foss.st.com> <20220919223027.GG759648@p14s> Content-Language: en-US In-Reply-To: <20220919223027.GG759648@p14s> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.75.127.44] X-ClientProxiedBy: SFHDAG2NODE3.st.com (10.75.127.6) To SHFDAG1NODE2.st.com (10.75.129.70) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.528,FMLib:17.11.122.1 definitions=2022-09-20_05,2022-09-20_02,2022-06-22_01 Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org Hi Mathieu, On 9/20/22 00:30, Mathieu Poirier wrote: > Hi, > > On Fri, Aug 26, 2022 at 01:52:28PM +0200, Arnaud Pouliquen wrote: >> 1) Update from V7 [1]: >> >> - rebase on rproc-next branch [2], commit 729c16326b7f ("remoteproc: imx_dsp_rproc: fix argument 2 of rproc_mem_entry_init") >> The updates take into account the integration of the >> commit 1404acbb7f68 ("remoteproc: Fix dma_mem leak after rproc_shutdown") >> - add Reviewed-by: Mathieu Poirier according to reviews on V7 >> >> >> [1] https://lkml.org/lkml/2022/7/13/663 >> [2] https://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux.git/log/?h=for-next >> >> 2) Patchset description: >> >> This series is a part of the work initiated a long time ago in >> the series "remoteproc: Decorelate virtio from core"[3] >> >> Objective of the work: >> - Update the remoteproc VirtIO device creation (use platform device) >> - Allow to declare remoteproc VirtIO device in DT >> - declare resources associated to a remote proc VirtIO >> - declare a list of VirtIO supported by the platform. >> - Prepare the enhancement to more VirtIO devices (e.g I2C, audio, video, ...). >> For instance be able to declare a I2C device in a virtio-i2C node. >> - Keep the legacy working! >> - Try to improve the picture about concerns reported by Christoph Hellwing [4][5] >> >> [3] https://lkml.org/lkml/2020/4/16/1817 >> [4] https://lkml.org/lkml/2021/6/23/607 >> [5] https://patchwork.kernel.org/project/linux-remoteproc/patch/AOKowLclCbOCKxyiJ71WeNyuAAj2q8EUtxrXbyky5E@cp7-web-042.plabs.ch/ >> >> In term of device tree this would result in such hierarchy (stm32mp1 example with 2 virtio RPMSG): >> >> m4_rproc: m4@10000000 { >> compatible = "st,stm32mp1-m4"; >> reg = <0x10000000 0x40000>, >> <0x30000000 0x40000>, >> <0x38000000 0x10000>; >> memory-region = <&retram>, <&mcuram>,<&mcuram2>; >> mboxes = <&ipcc 2>, <&ipcc 3>; >> mbox-names = "shutdown", "detach"; >> status = "okay"; >> >> #address-cells = <1>; >> #size-cells = <0>; >> >> vdev@0 { >> compatible = "rproc-virtio"; >> reg = <0>; >> virtio,id = <7>; /* RPMSG */ >> memory-region = <&vdev0vring0>, <&vdev0vring1>, <&vdev0buffer>; >> mboxes = <&ipcc 0>, <&ipcc 1>; >> mbox-names = "vq0", "vq1"; >> status = "okay"; >> }; >> >> vdev@1 { >> compatible = "rproc-virtio"; >> reg = <1>; >> virtio,id = <7>; /*RPMSG */ >> memory-region = <&vdev1vring0>, <&vdev1vring1>, <&vdev1buffer>; >> mboxes = <&ipcc 4>, <&ipcc 5>; >> mbox-names = "vq0", "vq1"; >> status = "okay"; >> }; >> }; > > I was in the process of applying this set when the last patch gave me a > checkpatch warning about "virtio,rproc" not being documented. > > I suggest to introduce a new "virtio-rproc.yaml" based on this work[1], with the > above in the example sections. Yes I saw the warning, but for this first series it is not possible to declare the associated "rproc-virtio" device in device tree. So at this step it seems not make senses to create the devicetree bindings file. More than that I don't know how I could justify the properties in bindings if there is not driver code associated. So i would be in favor of not adding the bindings in this series but to define bindings in the first patch of my "step 2" series; as done on my github: https://github.com/arnopo/linux/commit/9616d89a4f478cf78865a244efcde108d900f69f Please let me know your preference. Regards, Arnaud > > Thanks, > Mathieu > > [1]. https://elixir.bootlin.com/linux/v6.0-rc6/source/Documentation/devicetree/bindings/virtio/virtio-device.yaml > > >> >> I have divided the work in 4 steps to simplify the review, This series implements only >> the step 1: >> step 1: Redefine the remoteproc VirtIO device as a platform device >> - migrate rvdev management in remoteproc virtio.c, >> - create a remotproc virtio config ( can be disabled for platform that not use VirtIO IPC. >> step 2: Add possibility to declare and probe a VirtIO sub node >> - VirtIO bindings declaration, >> - multi DT VirtIO devices support, >> - introduction of a remote proc virtio bind device mechanism , >> => https://github.com/arnopo/linux/commits/step2-virtio-in-DT >> step 3: Add memory declaration in VirtIO subnode >> => https://github.com/arnopo/linux/commits/step3-virtio-memories >> step 4: Add mailbox declaration in VirtIO subnode >> => https://github.com/arnopo/linux/commits/step4-virtio-mailboxes >> >> Arnaud Pouliquen (4): >> remoteproc: core: Introduce rproc_rvdev_add_device function >> remoteproc: core: Introduce rproc_add_rvdev function >> remoteproc: Move rproc_vdev management to remoteproc_virtio.c >> remoteproc: virtio: Create platform device for the remoteproc_virtio >> >> drivers/remoteproc/remoteproc_core.c | 154 +++--------------- >> drivers/remoteproc/remoteproc_internal.h | 23 ++- >> drivers/remoteproc/remoteproc_virtio.c | 189 ++++++++++++++++++++--- >> include/linux/remoteproc.h | 6 +- >> 4 files changed, 210 insertions(+), 162 deletions(-) >> >> -- >> 2.24.3 >>