From patchwork Wed Feb 14 14:13:30 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramalingam C X-Patchwork-Id: 10219077 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 6FDCD60467 for ; Wed, 14 Feb 2018 14:20:29 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 62044288FC for ; Wed, 14 Feb 2018 14:20:29 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 56E5328FE9; Wed, 14 Feb 2018 14:20:29 +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 5F6DB288FC for ; Wed, 14 Feb 2018 14:20:28 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A27A26E40D; Wed, 14 Feb 2018 14:20:23 +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 00DE46E409 for ; Wed, 14 Feb 2018 14:20:21 +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 06:20:21 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.46,512,1511856000"; d="scan'208";a="204076825" Received: from mint-dev.iind.intel.com ([10.223.25.164]) by fmsmga005.fm.intel.com with ESMTP; 14 Feb 2018 06:20:19 -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 19:43:30 +0530 Message-Id: <1518617638-21684-16-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> Subject: [Intel-gfx] [PATCH 15/43] 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: , Cc: 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 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. Signed-off-by: Ramalingam C --- drivers/misc/mei/mei_hdcp.c | 64 +++++++++++++++++++++++++++++++++++++++++++++ include/linux/mei_hdcp.h | 8 ++++++ 2 files changed, 72 insertions(+) diff --git a/drivers/misc/mei/mei_hdcp.c b/drivers/misc/mei/mei_hdcp.c index d243db70a7de..5f0c56a1e51b 100644 --- a/drivers/misc/mei/mei_hdcp.c +++ b/drivers/misc/mei/mei_hdcp.c @@ -339,6 +339,70 @@ int mei_store_pairing_info(struct mei_hdcp_data *data, } EXPORT_SYMBOL(mei_store_pairing_info); +/** + * mei_initiate_locality_check: + * Function to prepare LC_Init. + * + * @data : Intel HW specific Data + * @hdcp2_lc_init : Pointer for storing LC_Init + * + * Returns 0 on Success, <0 on Failure + */ +int mei_initiate_locality_check(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 } }; + enum me_status status; + struct device *dev; + ssize_t byte; + + if (!data || !lc_init_data) + return -EINVAL; + + /* check for the mei_device enabled or not */ + if (!mei_cldev_active_and_enabled(data->cldev)) + return -ENODEV; + + dev = &data->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; + + /* Request to ME */ + byte = mei_cldev_send(data->cldev, (u8 *)&lc_init_in, + sizeof(lc_init_in)); + if (byte < 0) { + dev_err(dev, "mei_cldev_send failed. %d\n", (int)byte); + return byte; + } + + /* Response from ME */ + byte = mei_cldev_recv(data->cldev, (u8 *)&lc_init_out, + sizeof(lc_init_out)); + if (byte < 0) { + dev_err(dev, "mei_cldev_recv failed. %d\n", (int)byte); + return byte; + } + + status = (enum me_status)lc_init_out.header.status; + if (status != ME_HDCP_STATUS_SUCCESS) { + dev_err(dev, "ME cmd 0x%08X Failed. status: 0x%X\n", + WIRED_INIT_LOCALITY_CHECK, status); + return -1; + } + + lc_init_data->msg_id = LC_INIT; + memcpy(lc_init_data->r_n, lc_init_out.r_n, HDCP_RN_LEN); + return 0; +} +EXPORT_SYMBOL(mei_initiate_locality_check); + static int mei_hdcp_probe(struct mei_cl_device *cldev, const struct mei_cl_device_id *id) { diff --git a/include/linux/mei_hdcp.h b/include/linux/mei_hdcp.h index 449ac3af4d53..fd8a26dddacb 100644 --- a/include/linux/mei_hdcp.h +++ b/include/linux/mei_hdcp.h @@ -115,6 +115,8 @@ int mei_verify_hprime(struct mei_hdcp_data *data, struct hdcp2_ake_send_hprime *rx_hprime); int mei_store_pairing_info(struct mei_hdcp_data *data, struct hdcp2_ake_send_pairing_info *pairing_info); +int mei_initiate_locality_check(struct mei_hdcp_data *data, + struct hdcp2_lc_init *lc_init_data); #else static inline int mei_hdcp_cldev_get_reference(void *client_data, @@ -156,5 +158,11 @@ int mei_store_pairing_info(struct mei_hdcp_data *data, { return -ENODEV; } +static inline +int mei_initiate_locality_check(struct mei_hdcp_data *data, + struct hdcp2_lc_init *lc_init_data) +{ + return -ENODEV; +} #endif /* defined (CONFIG_INTEL_MEI_HDCP) */ #endif /* defined (_LINUX_MEI_HDCP_H) */