From patchwork Thu Feb 21 18:12:05 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramalingam C X-Patchwork-Id: 10824509 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 6CA53922 for ; Thu, 21 Feb 2019 18:18:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5E7B231CEE for ; Thu, 21 Feb 2019 18:18:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5308431CFF; Thu, 21 Feb 2019 18:18:41 +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=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 E720531CEE for ; Thu, 21 Feb 2019 18:18:40 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2060789467; Thu, 21 Feb 2019 18:18:31 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9D3B88944A; Thu, 21 Feb 2019 18:18:27 +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 fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 21 Feb 2019 10:18:27 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.58,396,1544515200"; d="scan'208";a="322320976" Received: from mint-dev.iind.intel.com ([10.223.25.164]) by fmsmga005.fm.intel.com with ESMTP; 21 Feb 2019 10:18:25 -0800 From: Ramalingam C To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, daniel.vetter@ffwll.ch, tomas.winkler@intel.com, uma.shankar@intel.com Subject: [PATCH v15 11/16] misc/mei/hdcp: Repeater topology verification and ack Date: Thu, 21 Feb 2019 23:42:05 +0530 Message-Id: <1550772730-23280-12-git-send-email-ramalingam.c@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1550772730-23280-1-git-send-email-ramalingam.c@intel.com> References: <1550772730-23280-1-git-send-email-ramalingam.c@intel.com> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Request ME to verify the downstream topology information received. ME FW will validate the Repeaters receiver id list and downstream topology. On Success ME FW will provide the Least Significant 128bits of VPrime, which forms the repeater ack. v2: Rebased. v3: cldev is passed as first parameter [Tomas] Redundant comments and cast are removed [Tomas] v4: %zd for ssize_t [Alexander] %s/return -1/return -EIO [Alexander] Style and typos fixed [Uma] v5: Rebased. v6: Rebasing. v7: Adjust to the new mei interface. Fix for Kdoc. v8: K-Doc addition. [Tomas] v9: renamed func as mei_hdcp_* [Tomas] Inline function is defined for DDI index [Tomas] v10: K-Doc fix. [Tomas] v11: Rebased. Signed-off-by: Ramalingam C Reviewed-by: Uma Shankar Acked-by: Tomas Winkler --- drivers/misc/mei/hdcp/mei_hdcp.c | 77 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 76 insertions(+), 1 deletion(-) diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index 9dc17654ffbc..e541d0d290e3 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -466,6 +466,80 @@ static int mei_hdcp_get_session_key(struct device *dev, return 0; } +/** + * mei_hdcp_repeater_check_flow_prepare_ack() - Validate the Downstream topology + * and prepare rep_ack. + * @dev: device corresponding to the mei_cl_device + * @data: Intel HW specific hdcp data + * @rep_topology: Receiver ID List to be validated + * @rep_send_ack : repeater ack from ME FW. + * + * Return: 0 on Success, <0 on Failure + */ +static int +mei_hdcp_repeater_check_flow_prepare_ack(struct device *dev, + struct hdcp_port_data *data, + struct hdcp2_rep_send_receiverid_list + *rep_topology, + struct hdcp2_rep_send_ack + *rep_send_ack) +{ + struct wired_cmd_verify_repeater_in verify_repeater_in = { { 0 } }; + struct wired_cmd_verify_repeater_out verify_repeater_out = { { 0 } }; + struct mei_cl_device *cldev; + ssize_t byte; + + if (!dev || !rep_topology || !rep_send_ack || !data) + return -EINVAL; + + cldev = to_mei_cl_device(dev); + + verify_repeater_in.header.api_version = HDCP_API_VERSION; + verify_repeater_in.header.command_id = WIRED_VERIFY_REPEATER; + verify_repeater_in.header.status = ME_HDCP_STATUS_SUCCESS; + verify_repeater_in.header.buffer_len = + WIRED_CMD_BUF_LEN_VERIFY_REPEATER_IN; + + verify_repeater_in.port.integrated_port_type = data->port_type; + verify_repeater_in.port.physical_port = mei_get_ddi_index(data->port); + + memcpy(verify_repeater_in.rx_info, rep_topology->rx_info, + HDCP_2_2_RXINFO_LEN); + memcpy(verify_repeater_in.seq_num_v, rep_topology->seq_num_v, + HDCP_2_2_SEQ_NUM_LEN); + memcpy(verify_repeater_in.v_prime, rep_topology->v_prime, + HDCP_2_2_V_PRIME_HALF_LEN); + memcpy(verify_repeater_in.receiver_ids, rep_topology->receiver_ids, + HDCP_2_2_RECEIVER_IDS_MAX_LEN); + + byte = mei_cldev_send(cldev, (u8 *)&verify_repeater_in, + sizeof(verify_repeater_in)); + if (byte < 0) { + dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte); + return byte; + } + + byte = mei_cldev_recv(cldev, (u8 *)&verify_repeater_out, + sizeof(verify_repeater_out)); + if (byte < 0) { + dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte); + return byte; + } + + if (verify_repeater_out.header.status != ME_HDCP_STATUS_SUCCESS) { + dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n", + WIRED_VERIFY_REPEATER, + verify_repeater_out.header.status); + return -EIO; + } + + memcpy(rep_send_ack->v, verify_repeater_out.v, + HDCP_2_2_V_PRIME_HALF_LEN); + rep_send_ack->msg_id = HDCP_2_2_REP_SEND_ACK; + + return 0; +} + static const __attribute__((unused)) struct i915_hdcp_component_ops mei_hdcp_ops = { .owner = THIS_MODULE, @@ -477,7 +551,8 @@ struct i915_hdcp_component_ops mei_hdcp_ops = { .initiate_locality_check = mei_hdcp_initiate_locality_check, .verify_lprime = mei_hdcp_verify_lprime, .get_session_key = mei_hdcp_get_session_key, - .repeater_check_flow_prepare_ack = NULL, + .repeater_check_flow_prepare_ack = + mei_hdcp_repeater_check_flow_prepare_ack, .verify_mprime = NULL, .enable_hdcp_authentication = NULL, .close_hdcp_session = NULL,