From patchwork Mon May 21 12:53:34 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramalingam C X-Patchwork-Id: 10415169 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 40D3E6053B for ; Mon, 21 May 2018 13:04:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3132D1FF13 for ; Mon, 21 May 2018 13:04:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 262F42582C; Mon, 21 May 2018 13:04:13 +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 A74291FF13 for ; Mon, 21 May 2018 13:04:12 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 71F4A89307; Mon, 21 May 2018 13:03:18 +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 BB9FD6F0A5; Mon, 21 May 2018 13:03:13 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 21 May 2018 06:03:13 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,426,1520924400"; d="scan'208";a="40968395" Received: from mint-dev.iind.intel.com ([10.223.25.164]) by fmsmga007.fm.intel.com with ESMTP; 21 May 2018 06:03:09 -0700 From: Ramalingam C To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Date: Mon, 21 May 2018 18:23:34 +0530 Message-Id: <1526907240-17639-16-git-send-email-ramalingam.c@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1526907240-17639-1-git-send-email-ramalingam.c@intel.com> References: <1526907240-17639-1-git-send-email-ramalingam.c@intel.com> Subject: [Intel-gfx] [PATCH v4 15/41] misc/mei/hdcp: Repeater topology verification and ack 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: alexander.usyskin@intel.com, tomas.winkler@intel.com MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" 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] Signed-off-by: Ramalingam C --- drivers/misc/mei/hdcp/mei_hdcp.c | 75 ++++++++++++++++++++++++++++++++++++++++ include/linux/mei_hdcp.h | 15 ++++++++ 2 files changed, 90 insertions(+) diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index 36c54c1c69e6..d729348f5ae2 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -484,6 +484,81 @@ int mei_get_session_key(struct mei_cl_device *cldev, struct mei_hdcp_data *data, } EXPORT_SYMBOL(mei_get_session_key); +/* + * mei_repeater_check_flow_prepare_ack: + * Function to validate the Downstream topology and prepare rep_ack. + * + * cldev : Pointer for mei client device + * data : Intel HW specific Data + * rep_topology : Pointer for Receiver Id List to be validated. + * rep_send_ack : Pointer for repeater ack + * + * Returns 0 on Success, <0 on Failure + */ +int +mei_repeater_check_flow_prepare_ack(struct mei_cl_device *cldev, + struct mei_hdcp_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 device *dev; + ssize_t byte; + + if (!rep_topology || !rep_send_ack || !data) + return -EINVAL; + + dev = &cldev->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 = 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_LPRIME_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_LPRIME_HALF_LEN); + rep_send_ack->msg_id = HDCP_2_2_REP_SEND_ACK; + + return 0; +} +EXPORT_SYMBOL(mei_repeater_check_flow_prepare_ack); + static void mei_cldev_state_notify_clients(struct mei_cl_device *cldev, bool enabled) { diff --git a/include/linux/mei_hdcp.h b/include/linux/mei_hdcp.h index d2efa7107339..2713cf321a58 100644 --- a/include/linux/mei_hdcp.h +++ b/include/linux/mei_hdcp.h @@ -129,6 +129,12 @@ int mei_verify_lprime(struct mei_cl_device *cldev, struct mei_hdcp_data *data, struct hdcp2_lc_send_lprime *rx_lprime); int mei_get_session_key(struct mei_cl_device *cldev, struct mei_hdcp_data *data, struct hdcp2_ske_send_eks *ske_data); +int +mei_repeater_check_flow_prepare_ack(struct mei_cl_device *cldev, + struct mei_hdcp_data *data, + struct hdcp2_rep_send_receiverid_list + *rep_topology, + struct hdcp2_rep_send_ack *rep_send_ack); #else static inline int mei_cldev_register_notify(struct notifier_block *nb) { @@ -191,5 +197,14 @@ int mei_get_session_key(struct mei_cl_device *cldev, struct mei_hdcp_data *data, { return -ENODEV; } +static inline int +mei_repeater_check_flow_prepare_ack(struct mei_cl_device *cldev, + struct mei_hdcp_data *data, + struct hdcp2_rep_send_receiverid_list + *rep_topology, + struct hdcp2_rep_send_ack *rep_send_ack) +{ + return -ENODEV; +} #endif /* IS_ENABLED(CONFIG_INTEL_MEI_HDCP) */ #endif /* defined (_LINUX_MEI_HDCP_H) */