From patchwork Thu Sep 27 06:55:22 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramalingam C X-Patchwork-Id: 10617463 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 B4719112B for ; Thu, 27 Sep 2018 07:02:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A4CAB2B099 for ; Thu, 27 Sep 2018 07:02:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 995272B09F; Thu, 27 Sep 2018 07:02:12 +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 435352B099 for ; Thu, 27 Sep 2018 07:02:12 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BF7666E4C6; Thu, 27 Sep 2018 06:59:20 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by gabe.freedesktop.org (Postfix) with ESMTPS id DE0E36E571; Thu, 27 Sep 2018 06:59:18 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Sep 2018 23:59:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,309,1534834800"; d="scan'208";a="95204918" Received: from mint-dev.iind.intel.com ([10.223.25.164]) by orsmga002.jf.intel.com with ESMTP; 26 Sep 2018 23:59:15 -0700 From: Ramalingam C To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, daniel@ffwll.ch, tomas.winkler@intel.com Date: Thu, 27 Sep 2018 12:25:22 +0530 Message-Id: <1538031330-21040-32-git-send-email-ramalingam.c@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1538031330-21040-1-git-send-email-ramalingam.c@intel.com> References: <1538031330-21040-1-git-send-email-ramalingam.c@intel.com> Subject: [Intel-gfx] [PATCH v7 31/39] 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: , 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] v5: Rebased. v6: No change. v7: Collected the Rb-ed by. Rebasing. Signed-off-by: Ramalingam C Reviewed-by: Uma Shankar --- drivers/misc/mei/hdcp/mei_hdcp.c | 61 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 60 insertions(+), 1 deletion(-) diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index 3ae50240c656..59ef9086cce4 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -400,6 +400,65 @@ static int mei_verify_lprime(struct mei_cl_device *cldev, return 0; } +/* + * 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 + */ +static 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; +} + static __attribute__((unused)) struct i915_hdcp_component_ops mei_hdcp_ops = { .owner = THIS_MODULE, @@ -410,7 +469,7 @@ struct i915_hdcp_component_ops mei_hdcp_ops = { .store_pairing_info = mei_store_pairing_info, .initiate_locality_check = mei_initiate_locality_check, .verify_lprime = mei_verify_lprime, - .get_session_key = NULL, + .get_session_key = mei_get_session_key, .repeater_check_flow_prepare_ack = NULL, .verify_mprime = NULL, .enable_hdcp_authentication = NULL,