From patchwork Tue Aug 25 16:49:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnaud POULIQUEN X-Patchwork-Id: 11735975 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 16B0B138A for ; Tue, 25 Aug 2020 16:52:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EE29B2075F for ; Tue, 25 Aug 2020 16:52:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=st.com header.i=@st.com header.b="YGKA1kki" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726633AbgHYQwh (ORCPT ); Tue, 25 Aug 2020 12:52:37 -0400 Received: from mx07-00178001.pphosted.com ([185.132.182.106]:58091 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726090AbgHYQwX (ORCPT ); Tue, 25 Aug 2020 12:52:23 -0400 Received: from pps.filterd (m0046668.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 07PGlScq007570; Tue, 25 Aug 2020 18:52:20 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=STMicroelectronics; bh=bFaFCJlPre9ESUbxiA1qF6tDhs9qqazLruK9j4B6DF4=; b=YGKA1kkid+xyPaVr3qgFlp4iD6MSSLQKG2gSaJPdN7RD53lB1s16HBE+Id+6oG2S3eVM KhodJoAs6GrdtDZrviKi9aMuRWQN9tf1i8KybjB1hrqdjWg6IImUqs8KYvjyRniIIfL4 bI5VpKBRXQUFyBrhvU7sICqHLVl5/CvMuyLtInH5sU3fJFfK2pIwzsVt25si0FADedce dsz60Gn01ZacMp/ukIidF5EOjNCOZPiLQ37Y5GrmWab4tWJMUsEp1Hs16Cl9T9MkEkFi fjYuUNPmvzAnQg75GF5Lk7LPAZonQKo2dtyg9hAqLgtjtSnUCe76z+i2/7kapQBXNEYA yg== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 333b2mm0jx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 25 Aug 2020 18:52:20 +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 B875F10002A; Tue, 25 Aug 2020 18:52:19 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag3node1.st.com [10.75.127.7]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id AD6FA2AE6AA; Tue, 25 Aug 2020 18:52:19 +0200 (CEST) Received: from localhost (10.75.127.44) by SFHDAG3NODE1.st.com (10.75.127.7) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Tue, 25 Aug 2020 18:52:19 +0200 From: Arnaud Pouliquen To: Bjorn Andersson , Ohad Ben-Cohen , Mathieu Poirier CC: , , , Subject: [PATCH v2 6/8] rpmsg: virtio: use rpmsg ns device for the ns announcement Date: Tue, 25 Aug 2020 18:49:05 +0200 Message-ID: <20200825164907.3642-7-arnaud.pouliquen@st.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200825164907.3642-1-arnaud.pouliquen@st.com> References: <20200825164907.3642-1-arnaud.pouliquen@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.44] X-ClientProxiedBy: SFHDAG8NODE2.st.com (10.75.127.23) To SFHDAG3NODE1.st.com (10.75.127.7) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235,18.0.687 definitions=2020-08-25_06:2020-08-25,2020-08-25 signatures=0 Sender: linux-remoteproc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org As generic NS driver is available, rely on it for NS management instead of managing it in RPMsg virtio bus. Signed-off-by: Arnaud Pouliquen --- drivers/rpmsg/Kconfig | 1 + drivers/rpmsg/virtio_rpmsg_bus.c | 86 ++++++++------------------------ 2 files changed, 21 insertions(+), 66 deletions(-) diff --git a/drivers/rpmsg/Kconfig b/drivers/rpmsg/Kconfig index c3fc75e6514b..1394114782d2 100644 --- a/drivers/rpmsg/Kconfig +++ b/drivers/rpmsg/Kconfig @@ -71,5 +71,6 @@ config RPMSG_VIRTIO depends on HAS_DMA select RPMSG select VIRTIO + select RPMSG_NS endmenu diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c index b2927661868c..f771fdae150e 100644 --- a/drivers/rpmsg/virtio_rpmsg_bus.c +++ b/drivers/rpmsg/virtio_rpmsg_bus.c @@ -48,7 +48,6 @@ * @endpoints_lock: lock of the endpoints set * @sendq: wait queue of sending contexts waiting for a tx buffers * @sleepers: number of senders that are waiting for a tx buffer - * @ns_ept: the bus's name service endpoint * * This structure stores the rpmsg state of a given virtio remote processor * device (there might be several virtio proc devices for each physical @@ -67,7 +66,6 @@ struct virtproc_info { struct mutex endpoints_lock; wait_queue_head_t sendq; atomic_t sleepers; - struct rpmsg_endpoint *ns_ept; }; /* The feature bitmap for virtio rpmsg */ @@ -841,68 +839,14 @@ static void rpmsg_xmit_done(struct virtqueue *svq) wake_up_interruptible(&vrp->sendq); } -/* invoked when a name service announcement arrives */ -static int rpmsg_ns_cb(struct rpmsg_device *rpdev, void *data, int len, - void *priv, u32 src) -{ - struct rpmsg_ns_msg *msg = data; - struct rpmsg_device *newch; - struct rpmsg_channel_info chinfo; - struct virtproc_info *vrp = priv; - struct device *dev = &vrp->vdev->dev; - int ret; - -#if defined(CONFIG_DYNAMIC_DEBUG) - dynamic_hex_dump("NS announcement: ", DUMP_PREFIX_NONE, 16, 1, - data, len, true); -#endif - - if (len != sizeof(*msg)) { - dev_err(dev, "malformed ns msg (%d)\n", len); - return -EINVAL; - } - - /* - * the name service ept does _not_ belong to a real rpmsg channel, - * and is handled by the rpmsg bus itself. - * for sanity reasons, make sure a valid rpdev has _not_ sneaked - * in somehow. - */ - if (rpdev) { - dev_err(dev, "anomaly: ns ept has an rpdev handle\n"); - return -EINVAL; - } - - /* don't trust the remote processor for null terminating the name */ - msg->name[RPMSG_NAME_SIZE - 1] = '\0'; - - strncpy(chinfo.name, msg->name, sizeof(chinfo.name)); - chinfo.src = RPMSG_ADDR_ANY; - chinfo.dst = virtio32_to_cpu(vrp->vdev, msg->addr); - - dev_info(dev, "%sing channel %s addr 0x%x\n", - virtio32_to_cpu(vrp->vdev, msg->flags) & RPMSG_NS_DESTROY ? - "destroy" : "creat", msg->name, chinfo.dst); - - if (virtio32_to_cpu(vrp->vdev, msg->flags) & RPMSG_NS_DESTROY) { - ret = rpmsg_unregister_device(&vrp->vdev->dev, &chinfo); - if (ret) - dev_err(dev, "rpmsg_destroy_channel failed: %d\n", ret); - } else { - newch = __rpmsg_create_channel(vrp, &chinfo); - if (!newch) - dev_err(dev, "rpmsg_create_channel failed\n"); - } - - return 0; -} - static int rpmsg_probe(struct virtio_device *vdev) { vq_callback_t *vq_cbs[] = { rpmsg_recv_done, rpmsg_xmit_done }; static const char * const names[] = { "input", "output" }; struct virtqueue *vqs[2]; struct virtproc_info *vrp; + struct virtio_rpmsg_channel *vch; + struct rpmsg_device *rpdev_ns; void *bufs_va; int err = 0, i; size_t total_buf_space; @@ -978,14 +922,27 @@ static int rpmsg_probe(struct virtio_device *vdev) /* if supported by the remote processor, enable the name service */ if (virtio_has_feature(vdev, VIRTIO_RPMSG_F_NS)) { - /* a dedicated endpoint handles the name service msgs */ - vrp->ns_ept = __rpmsg_create_ept(vrp, NULL, rpmsg_ns_cb, - vrp, RPMSG_NS_ADDR); - if (!vrp->ns_ept) { - dev_err(&vdev->dev, "failed to create the ns ept\n"); + vch = kzalloc(sizeof(*vch), GFP_KERNEL); + if (!vch) { err = -ENOMEM; goto free_coherent; } + + /* Link the channel to our vrp */ + vch->vrp = vrp; + + /* Assign public information to the rpmsg_device */ + rpdev_ns = &vch->rpdev; + rpdev_ns->ops = &virtio_rpmsg_ops; + + rpdev_ns->dev.parent = &vrp->vdev->dev; + rpdev_ns->dev.release = virtio_rpmsg_release_device; + + err = rpmsg_ns_register_device(rpdev_ns); + if (err) { + kfree(vch); + goto free_coherent; + } } /* @@ -1038,9 +995,6 @@ static void rpmsg_remove(struct virtio_device *vdev) if (ret) dev_warn(&vdev->dev, "can't remove rpmsg device: %d\n", ret); - if (vrp->ns_ept) - __rpmsg_destroy_ept(vrp, vrp->ns_ept); - idr_destroy(&vrp->endpoints); vdev->config->del_vqs(vrp->vdev);