From patchwork Fri Jul 27 12:17:25 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arun Kumar Neelakantam X-Patchwork-Id: 10547039 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CD4631822 for ; Fri, 27 Jul 2018 12:19:16 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B9DBE2B852 for ; Fri, 27 Jul 2018 12:19:16 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AAC602B858; Fri, 27 Jul 2018 12:19:16 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4CA542B85A for ; Fri, 27 Jul 2018 12:19:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730866AbeG0NkX (ORCPT ); Fri, 27 Jul 2018 09:40:23 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:46266 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730488AbeG0NkW (ORCPT ); Fri, 27 Jul 2018 09:40:22 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 0115D60B11; Fri, 27 Jul 2018 12:18:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1532693922; bh=gciUH9DwatZcOHGV9vSkKlvuQIZMiKJWEmVVfrbJ+xk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZnMh6orsCkJlL1sjTuN3CMlNCNk9pwfz2PM79KUjBApDq4vwxvUH4SoNjzhd90rxt Mih/Tn980IdlazPqhnBOg8PznDf5XcgPxGRWaZrtl5ubkln/pTlo4yCwsO9FYgEyUL vjy31KTOJGyyIIP6/00iPxX4TXRAElBGd4jBJxDg= Received: from aneelaka-linux.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: aneela@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id AED9C60B83; Fri, 27 Jul 2018 12:18:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1532693921; bh=gciUH9DwatZcOHGV9vSkKlvuQIZMiKJWEmVVfrbJ+xk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZbEV8k2xGbo3VbfeWiFQsM+UjHNTpqxC0ZsgBx316SsjeBmWJO5HMnhZH9N8+jxm8 UdCPD1bgNZ6Ya2jHgYb25ZvBCpk7Xq17G7Gs18CDYAODyWidrWofP+VNalWz6omGJd 2Am7QMBAAq1/1D4YJxKIfr5w4DrPHCsXKJSZ1feg= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org AED9C60B83 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=aneela@codeaurora.org From: Arun Kumar Neelakantam To: ohad@wizery.com, bjorn.andersson@linaro.org, clew@codeaurora.org, robh+dt@kernel.org, arnaud.pouliquen@st.com, andy.gross@linaro.org Cc: linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, Arun Kumar Neelakantam Subject: [PATCH V4 5/9] rpmsg: glink: Add support for rpmsg glink chrdev Date: Fri, 27 Jul 2018 17:47:25 +0530 Message-Id: <1532693849-7037-6-git-send-email-aneela@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1532693849-7037-1-git-send-email-aneela@codeaurora.org> References: <1532693849-7037-1-git-send-email-aneela@codeaurora.org> Sender: linux-remoteproc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Chris Lew RPMSG provides a char device interface to userspace. Probe the rpmsg chrdev channel to enable the rpmsg_ctrl device creation on glink transports. Signed-off-by: Chris Lew Signed-off-by: Arun Kumar Neelakantam --- drivers/rpmsg/qcom_glink_native.c | 40 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 39 insertions(+), 1 deletion(-) diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c index f43341d..9f3d026 100644 --- a/drivers/rpmsg/qcom_glink_native.c +++ b/drivers/rpmsg/qcom_glink_native.c @@ -1158,7 +1158,7 @@ static int qcom_glink_announce_create(struct rpmsg_device *rpdev) __be32 *val = defaults; int size; - if (glink->intentless) + if (glink->intentless || !completion_done(&channel->open_ack)) return 0; prop = of_find_property(np, "qcom,intents", NULL); @@ -1544,6 +1544,40 @@ static void qcom_glink_work(struct work_struct *work) } } +static void qcom_glink_device_release(struct device *dev) +{ + struct rpmsg_device *rpdev = to_rpmsg_device(dev); + struct glink_channel *channel = to_glink_channel(rpdev->ept); + + /* Release qcom_glink_alloc_channel() reference */ + kref_put(&channel->refcount, qcom_glink_channel_release); + kfree(rpdev); +} + +static int qcom_glink_create_chrdev(struct qcom_glink *glink) +{ + struct rpmsg_device *rpdev; + struct glink_channel *channel; + + rpdev = kzalloc(sizeof(*rpdev), GFP_KERNEL); + if (!rpdev) + return -ENOMEM; + + channel = qcom_glink_alloc_channel(glink, "rpmsg_chrdev"); + if (IS_ERR(channel)) { + kfree(rpdev); + return PTR_ERR(channel); + } + channel->rpdev = rpdev; + + rpdev->ept = &channel->ept; + rpdev->ops = &glink_device_ops; + rpdev->dev.parent = glink->dev; + rpdev->dev.release = qcom_glink_device_release; + + return rpmsg_chrdev_register_device(rpdev); +} + struct qcom_glink *qcom_glink_native_probe(struct device *dev, unsigned long features, struct qcom_glink_pipe *rx, @@ -1603,6 +1637,10 @@ struct qcom_glink *qcom_glink_native_probe(struct device *dev, if (ret) return ERR_PTR(ret); + ret = qcom_glink_create_chrdev(glink); + if (ret) + dev_err(glink->dev, "failed to register chrdev\n"); + return glink; } EXPORT_SYMBOL_GPL(qcom_glink_native_probe);