From patchwork Wed Feb 14 14:13:20 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Ramalingam C X-Patchwork-Id: 10219055 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E8177602CB for ; Wed, 14 Feb 2018 14:20:02 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D6E2C288FC for ; Wed, 14 Feb 2018 14:20:02 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C8EA428FEE; Wed, 14 Feb 2018 14:20:02 +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=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 40F4D288FC for ; Wed, 14 Feb 2018 14:20:02 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7B6926E403; Wed, 14 Feb 2018 14:20:01 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id 763E36E402 for ; Wed, 14 Feb 2018 14:19:58 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 14 Feb 2018 06:19:58 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.46,512,1511856000"; d="scan'208";a="204076697" Received: from mint-dev.iind.intel.com ([10.223.25.164]) by fmsmga005.fm.intel.com with ESMTP; 14 Feb 2018 06:19:55 -0800 From: Ramalingam C To: seanpaul@chromium.org, intel-gfx@lists.freedesktop.org, rodrigo.vivi@intel.com, daniel.vetter@ffwll.ch Date: Wed, 14 Feb 2018 19:43:20 +0530 Message-Id: <1518617638-21684-6-git-send-email-ramalingam.c@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1518617638-21684-1-git-send-email-ramalingam.c@intel.com> References: <1518617638-21684-1-git-send-email-ramalingam.c@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 05/43] misc/mei/hdcp: Client driver for HDCP application X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: tomas.winkler@intel.com Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP ME FW is contributes a vital role in HDCP2.2 authentication. HDCP2.2 driver needs to communicate to ME FW for each step of the HDCP2.2 authentication. ME FW prepare and HDCP2.2 authentication parameters and encrypt them as per spec. With such parameter Driver prepares HDCP2.2 auth messages and communicate with HDCP2.2 sink. Similarly HDCP2. sink's response is shared with ME FW for decrypt and verification. Once All the steps of HDCP2.2 authentications are complete on driver's request ME FW will configure the port as authenticated and supply the HDCP keys to the Gen HW for encryption. Only after this stage HDCP2.2 driver can start the HDCP2.2 encryption for a port. ME FW is interfaced to kernel through MEI Bus Driver. To obtain the HDCP2.2 services from the ME FW through MEI Bus driver MEI Client Driver is developed. Signed-off-by: Ramalingam C Signed-off-by: Tomas Winkler --- drivers/misc/mei/mei_hdcp.c | 80 +++++++++++++++++++++++++++++++++++++++++++++ drivers/misc/mei/mei_hdcp.h | 32 ++++++++++++++++++ 2 files changed, 112 insertions(+) create mode 100644 drivers/misc/mei/mei_hdcp.c create mode 100644 drivers/misc/mei/mei_hdcp.h diff --git a/drivers/misc/mei/mei_hdcp.c b/drivers/misc/mei/mei_hdcp.c new file mode 100644 index 000000000000..aa211763e520 --- /dev/null +++ b/drivers/misc/mei/mei_hdcp.c @@ -0,0 +1,80 @@ +/* + * Copyright © 2017 Intel Corporation + * + * Mei_hdcp.c: client driver for mei bus driver + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Authors: + * Ramalingam C + */ + +#include +#include +#include + +#include "mei_hdcp.h" + +struct mei_hdcp mei_hdcp; + +static int mei_hdcp_probe(struct mei_cl_device *cldev, + const struct mei_cl_device_id *id) +{ + int ret; + + mei_hdcp.cldev = cldev; + mei_cldev_set_drvdata(cldev, &mei_hdcp); + + ret = mei_cldev_enable(cldev); + if (ret < 0) + dev_err(&cldev->dev, "mei_cldev_enable Failed. %d\n", ret); + + return ret; +} + +static int mei_hdcp_remove(struct mei_cl_device *cldev) +{ + mei_cldev_disable(cldev); + return 0; +} + +#define WIDI_HECI_CLIENT_GUID UUID_LE(0xB638AB7E, 0x94E2, 0x4EA2, 0xA5, \ + 0x52, 0xD1, 0xC5, 0x4B, \ + 0x62, 0x7F, 0x04) +#define MEI_HDCP2_2_UUID WIDI_HECI_CLIENT_GUID + +static struct mei_cl_device_id mei_hdcp_tbl[] = { + { .uuid = MEI_HDCP2_2_UUID, .version = MEI_CL_VERSION_ANY }, + { } +}; +MODULE_DEVICE_TABLE(mei, mei_hdcp_tbl); + +static struct mei_cl_driver mei_hdcp_driver = { + .id_table = mei_hdcp_tbl, + .name = KBUILD_MODNAME, + .probe = mei_hdcp_probe, + .remove = mei_hdcp_remove, +}; + +module_mei_cl_driver(mei_hdcp_driver); + +MODULE_AUTHOR("Intel Corporation"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("HDCP"); diff --git a/drivers/misc/mei/mei_hdcp.h b/drivers/misc/mei/mei_hdcp.h new file mode 100644 index 000000000000..c06c0d767c4f --- /dev/null +++ b/drivers/misc/mei/mei_hdcp.h @@ -0,0 +1,32 @@ +/* + * Copyright (c) 2017 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ +#ifndef __MEI_HDCP_H__ +#define __MEI_HDCP_H__ + +#include + +struct mei_hdcp { + struct mei_cl_device *cldev; +}; + +#endif /* __MEI_HDCP_H__ */