From patchwork Thu Feb 4 08:45:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnaud Pouliquen X-Patchwork-Id: 12066589 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8ECBFC433E9 for ; Thu, 4 Feb 2021 08:50:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5129664F6D for ; Thu, 4 Feb 2021 08:50:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235126AbhBDIrI (ORCPT ); Thu, 4 Feb 2021 03:47:08 -0500 Received: from mx07-00178001.pphosted.com ([185.132.182.106]:2728 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235096AbhBDIrG (ORCPT ); Thu, 4 Feb 2021 03:47:06 -0500 Received: from pps.filterd (m0046668.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 1148ftTc005300; Thu, 4 Feb 2021 09:46:19 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=selector1; bh=hs5ntI48NvW7gaVrpRXbUA/P/bQnTWX7GlNcZaiJfvw=; b=ElXJ7OnzSNT0VEt17IApfGb/8FZbgZIu/ZfTV9xGkcRRIEx1YWZqewXaVqzD3Twl6112 lEbfqkDxNbFLvvx026ZN1GOsZ5LBE1giBEg1CTUHyIFtSPRpiFN/rX5RRmDm6BRQKFFc yvPEkQDUQr9fnW+b4WWufB8sbTDHcwu4fcPxPhxFOAsOJNRsXePq5nWqKza4omgvTOCi dLOduMwofemcFMIOtIPQ0CIXXmde7yiz79Ary8vucj/rUaeeKaCCHkJn9Ag7SB/7xhEe wiUzg8uccT9AKB5DIXPvWtvUuz49jhR/TzSbWHh7C7uoSLUQBqKqYJRmsT19T/b5Qg8M aQ== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 36d0fs5xst-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 04 Feb 2021 09:46:19 +0100 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 57EF510002A; Thu, 4 Feb 2021 09:46:19 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag2node3.st.com [10.75.127.6]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 4905722AE4D; Thu, 4 Feb 2021 09:46:19 +0100 (CET) Received: from localhost (10.75.127.50) by SFHDAG2NODE3.st.com (10.75.127.6) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Thu, 4 Feb 2021 09:46:18 +0100 From: Arnaud Pouliquen To: Bjorn Andersson , Ohad Ben-Cohen , Mathieu Poirier , Andy Gross CC: , , , , Subject: [PATCH v3 07/15] rpmsg: virtio: probe the rpmsg_ctrl device Date: Thu, 4 Feb 2021 09:45:26 +0100 Message-ID: <20210204084534.10516-8-arnaud.pouliquen@foss.st.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210204084534.10516-1-arnaud.pouliquen@foss.st.com> References: <20210204084534.10516-1-arnaud.pouliquen@foss.st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.50] X-ClientProxiedBy: SFHDAG1NODE2.st.com (10.75.127.2) To SFHDAG2NODE3.st.com (10.75.127.6) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369,18.0.737 definitions=2021-02-04_03:2021-02-04,2021-02-04 signatures=0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Instantiate the rpmsg_ioctl device on virtio RPMsg bus creation. This provides the possibility to expose the RPMSG_CREATE_EPT_IOCTL to create RPMsg chdev endpoint. Signed-off-by: Arnaud Pouliquen Reported-by: kernel test robot --- V3: Fix compilation issue Reported-by: kernel test robot Reported-by: Dan Carpenter warnings: drivers/rpmsg/virtio_rpmsg_bus.c:978 rpmsg_probe() error: uninitialized symbol 'vch'. drivers/rpmsg/virtio_rpmsg_bus.c:979 rpmsg_probe() error: uninitialized symbol 'rpdev_ctrl'. --- drivers/rpmsg/virtio_rpmsg_bus.c | 37 +++++++++++++++++++++++++++++++- 1 file changed, 36 insertions(+), 1 deletion(-) diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c index e87d4cf926eb..5143fdeca306 100644 --- a/drivers/rpmsg/virtio_rpmsg_bus.c +++ b/drivers/rpmsg/virtio_rpmsg_bus.c @@ -813,6 +813,35 @@ static void rpmsg_xmit_done(struct virtqueue *svq) wake_up_interruptible(&vrp->sendq); } +static struct rpmsg_device *rpmsg_virtio_add_char_dev(struct virtio_device *vdev) +{ + struct virtproc_info *vrp = vdev->priv; + struct virtio_rpmsg_channel *vch; + struct rpmsg_device *rpdev_ctrl; + int err = 0; + + vch = kzalloc(sizeof(*vch), GFP_KERNEL); + if (!vch) + return ERR_PTR(-ENOMEM); + + /* Link the channel to the vrp */ + vch->vrp = vrp; + + /* Assign public information to the rpmsg_device */ + rpdev_ctrl = &vch->rpdev; + rpdev_ctrl->ops = &virtio_rpmsg_ops; + + rpdev_ctrl->dev.parent = &vrp->vdev->dev; + rpdev_ctrl->dev.release = virtio_rpmsg_release_device; + rpdev_ctrl->little_endian = virtio_is_little_endian(vrp->vdev); + + err = rpmsg_ctrl_register_device(rpdev_ctrl); + if (err) + return ERR_PTR(err); + + return rpdev_ctrl; +} + static int rpmsg_probe(struct virtio_device *vdev) { vq_callback_t *vq_cbs[] = { rpmsg_recv_done, rpmsg_xmit_done }; @@ -820,7 +849,7 @@ static int rpmsg_probe(struct virtio_device *vdev) struct virtqueue *vqs[2]; struct virtproc_info *vrp; struct virtio_rpmsg_channel *vch; - struct rpmsg_device *rpdev_ns; + struct rpmsg_device *rpdev_ns = NULL, *rpdev_ctrl = NULL; void *bufs_va; int err = 0, i; size_t total_buf_space; @@ -918,6 +947,11 @@ static int rpmsg_probe(struct virtio_device *vdev) goto free_coherent; } + rpdev_ctrl = rpmsg_virtio_add_char_dev(vdev); + if (IS_ERR(rpdev_ctrl)) { + err = PTR_ERR(rpdev_ctrl); + goto free_coherent; + } /* * Prepare to kick but don't notify yet - we can't do this before * device is ready. @@ -941,6 +975,7 @@ static int rpmsg_probe(struct virtio_device *vdev) free_coherent: kfree(vch); + kfree(to_virtio_rpmsg_channel(rpdev_ctrl)); dma_free_coherent(vdev->dev.parent, total_buf_space, bufs_va, vrp->bufs_dma); vqs_del: