From patchwork Mon May 21 12:53:30 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramalingam C X-Patchwork-Id: 10415153 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 670256053B for ; Mon, 21 May 2018 13:03:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 579701FE82 for ; Mon, 21 May 2018 13:03:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4C6212889B; Mon, 21 May 2018 13:03:36 +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 C63061FE82 for ; Mon, 21 May 2018 13:03:35 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A72A16F0B5; Mon, 21 May 2018 13:03:00 +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 56ABB6F0B5; Mon, 21 May 2018 13:02:58 +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 06:02:57 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,426,1520924400"; d="scan'208";a="40968329" Received: from mint-dev.iind.intel.com ([10.223.25.164]) by fmsmga007.fm.intel.com with ESMTP; 21 May 2018 06:02:54 -0700 From: Ramalingam C To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Date: Mon, 21 May 2018 18:23:30 +0530 Message-Id: <1526907240-17639-12-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 11/41] misc/mei/hdcp: Store the HDCP Pairing info 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 Provides Pairing info to ME to store. Pairing is a process to fast track the subsequent authentication with the same HDCP sink. On Success, received HDCP pairing info is stored in non-volatile memory of ME. 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 fixed [Uma] Signed-off-by: Ramalingam C --- drivers/misc/mei/hdcp/mei_hdcp.c | 61 ++++++++++++++++++++++++++++++++++++++++ include/linux/mei_hdcp.h | 10 +++++++ 2 files changed, 71 insertions(+) diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index a521d111751a..878485e53d5a 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -247,6 +247,67 @@ int mei_verify_hprime(struct mei_cl_device *cldev, struct mei_hdcp_data *data, } EXPORT_SYMBOL(mei_verify_hprime); +/* + * mei_store_pairing_info: + * Function to store pairing info received from panel + * + * cldev : Pointer for mei client device + * data : Intel HW specific Data + * pairing_info : Pointer for AKE_Send_Pairing_Info + * + * Returns 0 on Success, <0 on Failure + */ +int mei_store_pairing_info(struct mei_cl_device *cldev, + struct mei_hdcp_data *data, + struct hdcp2_ake_send_pairing_info *pairing_info) +{ + struct wired_cmd_ake_send_pairing_info_in pairing_info_in = { { 0 } }; + struct wired_cmd_ake_send_pairing_info_out pairing_info_out = { { 0 } }; + struct device *dev; + ssize_t byte; + + if (!data || !pairing_info) + return -EINVAL; + + dev = &cldev->dev; + + pairing_info_in.header.api_version = HDCP_API_VERSION; + pairing_info_in.header.command_id = WIRED_AKE_SEND_PAIRING_INFO; + pairing_info_in.header.status = ME_HDCP_STATUS_SUCCESS; + pairing_info_in.header.buffer_len = + WIRED_CMD_BUF_LEN_SEND_PAIRING_INFO_IN; + + pairing_info_in.port.integrated_port_type = data->port_type; + pairing_info_in.port.physical_port = data->port; + + memcpy(pairing_info_in.e_kh_km, pairing_info->e_kh_km, + sizeof(pairing_info_in.e_kh_km)); + + byte = mei_cldev_send(cldev, (u8 *)&pairing_info_in, + sizeof(pairing_info_in)); + if (byte < 0) { + dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte); + return byte; + } + + byte = mei_cldev_recv(cldev, (u8 *)&pairing_info_out, + sizeof(pairing_info_out)); + if (byte < 0) { + dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte); + return byte; + } + + if (pairing_info_out.header.status != ME_HDCP_STATUS_SUCCESS) { + dev_dbg(dev, "ME cmd 0x%08X failed. Status: 0x%X\n", + WIRED_AKE_SEND_PAIRING_INFO, + pairing_info_out.header.status); + return -EIO; + } + + return 0; +} +EXPORT_SYMBOL(mei_store_pairing_info); + 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 b97eb4d15393..23291d073d4b 100644 --- a/include/linux/mei_hdcp.h +++ b/include/linux/mei_hdcp.h @@ -119,6 +119,9 @@ mei_verify_receiver_cert_prepare_km(struct mei_cl_device *cldev, size_t *msg_sz); int mei_verify_hprime(struct mei_cl_device *cldev, struct mei_hdcp_data *data, struct hdcp2_ake_send_hprime *rx_hprime); +int mei_store_pairing_info(struct mei_cl_device *cldev, + struct mei_hdcp_data *data, + struct hdcp2_ake_send_pairing_info *pairing_info); #else static inline int mei_cldev_register_notify(struct notifier_block *nb) { @@ -155,5 +158,12 @@ int mei_verify_hprime(struct mei_cl_device *cldev, struct mei_hdcp_data *data, { return -ENODEV; } +static inline +int mei_store_pairing_info(struct mei_cl_device *cldev, + struct mei_hdcp_data *data, + struct hdcp2_ake_send_pairing_info *pairing_info) +{ + return -ENODEV; +} #endif /* IS_ENABLED(CONFIG_INTEL_MEI_HDCP) */ #endif /* defined (_LINUX_MEI_HDCP_H) */