From patchwork Wed Jun 27 08:40:23 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramalingam C X-Patchwork-Id: 10490981 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 6F31F60230 for ; Wed, 27 Jun 2018 08:54:39 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5CFA31FE8A for ; Wed, 27 Jun 2018 08:54:39 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5108328641; Wed, 27 Jun 2018 08:54:39 +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=-5.2 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=unavailable 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 0AB8F1FE8A for ; Wed, 27 Jun 2018 08:54:39 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id EF5E76E836; Wed, 27 Jun 2018 08:51:50 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id E39396E825; Wed, 27 Jun 2018 08:51:47 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 27 Jun 2018 01:51:47 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,278,1526367600"; d="scan'208";a="211536300" Received: from mint-dev.iind.intel.com ([10.223.25.164]) by orsmga004.jf.intel.com with ESMTP; 27 Jun 2018 01:51:33 -0700 From: Ramalingam C To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, daniel@ffwll.ch, tomas.winkler@intel.com, alexander.usyskin@intel.com, uma.shankar@intel.com Date: Wed, 27 Jun 2018 14:10:23 +0530 Message-Id: <1530088829-11730-35-git-send-email-ramalingam.c@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1530088829-11730-1-git-send-email-ramalingam.c@intel.com> References: <1530088829-11730-1-git-send-email-ramalingam.c@intel.com> Subject: [Intel-gfx] [PATCH v5 34/40] misc/mei/hdcp: Initiate Locality check 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: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP Requests ME to start the second stage of HDCP2.2 authentication, called Locality Check. On Success, ME FW will provide LC_Init message to send to hdcp sink. v2: Rebased. v3: cldev is passed as first parameter [Tomas] Redundant comments and cast are removed [Tomas] v4: %zd used for ssize_t [Alexander] %s/return -1/return -EIO [Alexander] Style fixed [Uma] v5: Rebased. Signed-off-by: Ramalingam C --- drivers/misc/mei/hdcp/mei_hdcp.c | 58 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 57 insertions(+), 1 deletion(-) diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index 7c833378bc60..2a0369f46326 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -307,6 +307,62 @@ mei_store_pairing_info(struct mei_cl_device *cldev, return 0; } +/* + * mei_initiate_locality_check: + * Function to prepare LC_Init. + * + * cldev : Pointer for mei client device + * data : Intel HW specific Data + * hdcp2_lc_init : Pointer for storing LC_Init + * + * Returns 0 on Success, <0 on Failure + */ +static int mei_initiate_locality_check(struct mei_cl_device *cldev, + struct mei_hdcp_data *data, + struct hdcp2_lc_init *lc_init_data) +{ + struct wired_cmd_init_locality_check_in lc_init_in = { { 0 } }; + struct wired_cmd_init_locality_check_out lc_init_out = { { 0 } }; + struct device *dev; + ssize_t byte; + + if (!data || !lc_init_data) + return -EINVAL; + + dev = &cldev->dev; + + lc_init_in.header.api_version = HDCP_API_VERSION; + lc_init_in.header.command_id = WIRED_INIT_LOCALITY_CHECK; + lc_init_in.header.status = ME_HDCP_STATUS_SUCCESS; + lc_init_in.header.buffer_len = WIRED_CMD_BUF_LEN_INIT_LOCALITY_CHECK_IN; + + lc_init_in.port.integrated_port_type = data->port_type; + lc_init_in.port.physical_port = data->port; + + byte = mei_cldev_send(cldev, (u8 *)&lc_init_in, sizeof(lc_init_in)); + if (byte < 0) { + dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte); + return byte; + } + + byte = mei_cldev_recv(cldev, (u8 *)&lc_init_out, sizeof(lc_init_out)); + if (byte < 0) { + dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte); + return byte; + } + + if (lc_init_out.header.status != ME_HDCP_STATUS_SUCCESS) { + dev_dbg(dev, "ME cmd 0x%08X Failed. status: 0x%X\n", + WIRED_INIT_LOCALITY_CHECK, lc_init_out.header.status); + return -EIO; + } + + lc_init_data->msg_id = HDCP_2_2_LC_INIT; + memcpy(lc_init_data->r_n, lc_init_out.r_n, HDCP_2_2_RN_LEN); + + return 0; +} + struct i915_hdcp_component_ops mei_hdcp_component_ops = { .owner = THIS_MODULE, .initiate_hdcp2_session = mei_initiate_hdcp2_session, @@ -314,7 +370,7 @@ struct i915_hdcp_component_ops mei_hdcp_component_ops = { mei_verify_receiver_cert_prepare_km, .verify_hprime = mei_verify_hprime, .store_pairing_info = mei_store_pairing_info, - .initiate_locality_check = NULL, + .initiate_locality_check = mei_initiate_locality_check, .verify_lprime = NULL, .get_session_key = NULL, .repeater_check_flow_prepare_ack = NULL,