From patchwork Wed Mar 31 03:09:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kasireddy, Vivek" X-Patchwork-Id: 12174267 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 5DC21C433DB for ; Wed, 31 Mar 2021 03:23:34 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D5953619A7 for ; Wed, 31 Mar 2021 03:23:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D5953619A7 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:40572 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lRRS8-0004E6-T3 for qemu-devel@archiver.kernel.org; Tue, 30 Mar 2021 23:23:32 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:36466) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lRRQT-0002Yl-8K for qemu-devel@nongnu.org; Tue, 30 Mar 2021 23:21:49 -0400 Received: from mga18.intel.com ([134.134.136.126]:53070) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lRRQL-00057q-Ml for qemu-devel@nongnu.org; Tue, 30 Mar 2021 23:21:48 -0400 IronPort-SDR: /WMHXdbo7ES+ou6oY7cZDiUYJ3Emw88Bwr9DkBgMDTzgoj5T4dCBusAh5MEcIW5FKbKRHYsaF7 OP3QhfEaamvA== X-IronPort-AV: E=McAfee;i="6000,8403,9939"; a="179449760" X-IronPort-AV: E=Sophos;i="5.81,291,1610438400"; d="scan'208";a="179449760" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Mar 2021 20:21:33 -0700 IronPort-SDR: xQznw9dCNKkWdS7I4ZPme1FGyAxWilkVYdcI6qR/dI5U2jTROIawDKn7ydIZPUuCHWUKZJYetl RVz3qKhksjAg== X-IronPort-AV: E=Sophos;i="5.81,291,1610438400"; d="scan'208";a="418454105" Received: from vkasired-desk2.fm.intel.com ([10.105.128.127]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Mar 2021 20:21:33 -0700 From: Vivek Kasireddy To: qemu-devel@nongnu.org Subject: [PATCH 01/11] ui: Get the fd associated with udmabuf driver Date: Tue, 30 Mar 2021 20:09:51 -0700 Message-Id: <20210331031001.1564125-2-vivek.kasireddy@intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210331031001.1564125-1-vivek.kasireddy@intel.com> References: <20210331031001.1564125-1-vivek.kasireddy@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=134.134.136.126; envelope-from=vivek.kasireddy@intel.com; helo=mga18.intel.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Vivek Kasireddy , Gerd Hoffmann Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Try to open the udmabuf dev node for the first time or return the fd if the device was previously opened. Based-on-patch-by: Gerd Hoffmann Signed-off-by: Vivek Kasireddy --- include/ui/console.h | 3 +++ ui/meson.build | 1 + ui/udmabuf.c | 40 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 44 insertions(+) create mode 100644 ui/udmabuf.c diff --git a/include/ui/console.h b/include/ui/console.h index ca3c7af6a6..b30b63976a 100644 --- a/include/ui/console.h +++ b/include/ui/console.h @@ -471,4 +471,7 @@ bool vnc_display_reload_certs(const char *id, Error **errp); /* input.c */ int index_from_key(const char *key, size_t key_length); +/* udmabuf.c */ +int udmabuf_fd(void); + #endif diff --git a/ui/meson.build b/ui/meson.build index e8d3ff41b9..7a709ff548 100644 --- a/ui/meson.build +++ b/ui/meson.build @@ -11,6 +11,7 @@ softmmu_ss.add(files( 'kbd-state.c', 'keymaps.c', 'qemu-pixman.c', + 'udmabuf.c', )) softmmu_ss.add([spice_headers, files('spice-module.c')]) diff --git a/ui/udmabuf.c b/ui/udmabuf.c new file mode 100644 index 0000000000..e6234fd86f --- /dev/null +++ b/ui/udmabuf.c @@ -0,0 +1,40 @@ +/* + * udmabuf helper functions. + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "ui/console.h" + +#ifdef CONFIG_LINUX + +#include +#include + +int udmabuf_fd(void) +{ + static bool first = true; + static int udmabuf; + + if (!first) { + return udmabuf; + } + first = false; + + udmabuf = open("/dev/udmabuf", O_RDWR); + if (udmabuf < 0) { + warn_report("open /dev/udmabuf: %s", strerror(errno)); + } + return udmabuf; +} + +#else + +int udmabuf_fd(void) +{ + return -1; +} + +#endif