From patchwork Mon May 21 12:53:33 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramalingam C X-Patchwork-Id: 10415171 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 7392C600CC for ; Mon, 21 May 2018 13:04:15 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 647771FF13 for ; Mon, 21 May 2018 13:04:15 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5963D2582C; Mon, 21 May 2018 13:04:15 +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 132201FF13 for ; Mon, 21 May 2018 13:04:15 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 051166F0A2; Mon, 21 May 2018 13:03:19 +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 DE3476F078; Mon, 21 May 2018 13:03:09 +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 06:03:09 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,426,1520924400"; d="scan'208";a="40968378" Received: from mint-dev.iind.intel.com ([10.223.25.164]) by fmsmga007.fm.intel.com with ESMTP; 21 May 2018 06:03:05 -0700 From: Ramalingam C To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Date: Mon, 21 May 2018 18:23:33 +0530 Message-Id: <1526907240-17639-15-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 14/41] misc/mei/hdcp: Prepare Session Key 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 to ME to prepare the encrypted session key. On Success, ME provides Encrypted session key. Function populates the HDCP2.2 authentication msg SKE_Send_Eks. 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 | 59 ++++++++++++++++++++++++++++++++++++++++ include/linux/mei_hdcp.h | 8 ++++++ 2 files changed, 67 insertions(+) diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index 9582109923e4..36c54c1c69e6 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -425,6 +425,65 @@ int mei_verify_lprime(struct mei_cl_device *cldev, struct mei_hdcp_data *data, } EXPORT_SYMBOL(mei_verify_lprime); +/* + * mei_get_session_key: + * Function to prepare SKE_Send_Eks. + * + * cldev : Pointer for mei client device + * data : Intel HW specific Data + * ske_data : Pointer for SKE_Send_Eks. + * + * Returns 0 on Success, <0 on Failure + */ +int mei_get_session_key(struct mei_cl_device *cldev, struct mei_hdcp_data *data, + struct hdcp2_ske_send_eks *ske_data) +{ + struct wired_cmd_get_session_key_in get_skey_in = { { 0 } }; + struct wired_cmd_get_session_key_out get_skey_out = { { 0 } }; + struct device *dev; + ssize_t byte; + + if (!data || !ske_data) + return -EINVAL; + + dev = &cldev->dev; + + get_skey_in.header.api_version = HDCP_API_VERSION; + get_skey_in.header.command_id = WIRED_GET_SESSION_KEY; + get_skey_in.header.status = ME_HDCP_STATUS_SUCCESS; + get_skey_in.header.buffer_len = WIRED_CMD_BUF_LEN_GET_SESSION_KEY_IN; + + get_skey_in.port.integrated_port_type = data->port_type; + get_skey_in.port.physical_port = data->port; + + byte = mei_cldev_send(cldev, (u8 *)&get_skey_in, sizeof(get_skey_in)); + if (byte < 0) { + dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte); + return byte; + } + + byte = mei_cldev_recv(cldev, (u8 *)&get_skey_out, sizeof(get_skey_out)); + + if (byte < 0) { + dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte); + return byte; + } + + if (get_skey_out.header.status != ME_HDCP_STATUS_SUCCESS) { + dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n", + WIRED_GET_SESSION_KEY, get_skey_out.header.status); + return -EIO; + } + + ske_data->msg_id = HDCP_2_2_SKE_SEND_EKS; + memcpy(ske_data->e_dkey_ks, get_skey_out.e_dkey_ks, + HDCP_2_2_E_DKEY_KS_LEN); + memcpy(ske_data->riv, get_skey_out.r_iv, HDCP_2_2_RIV_LEN); + + return 0; +} +EXPORT_SYMBOL(mei_get_session_key); + 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 c9a0bb9d10e8..d2efa7107339 100644 --- a/include/linux/mei_hdcp.h +++ b/include/linux/mei_hdcp.h @@ -127,6 +127,8 @@ int mei_initiate_locality_check(struct mei_cl_device *cldev, struct hdcp2_lc_init *lc_init_data); 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); #else static inline int mei_cldev_register_notify(struct notifier_block *nb) { @@ -183,5 +185,11 @@ int mei_verify_lprime(struct mei_cl_device *cldev, struct mei_hdcp_data *data, { return -ENODEV; } +static inline +int mei_get_session_key(struct mei_cl_device *cldev, struct mei_hdcp_data *data, + struct hdcp2_ske_send_eks *ske_data) +{ + return -ENODEV; +} #endif /* IS_ENABLED(CONFIG_INTEL_MEI_HDCP) */ #endif /* defined (_LINUX_MEI_HDCP_H) */