From patchwork Tue Apr 3 13:57:23 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramalingam C X-Patchwork-Id: 10321169 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 2819160318 for ; Tue, 3 Apr 2018 14:09:39 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 188C128865 for ; Tue, 3 Apr 2018 14:09:39 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0A0BD28A31; Tue, 3 Apr 2018 14:09:39 +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=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 B157728865 for ; Tue, 3 Apr 2018 14:09:38 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7133D6E50B; Tue, 3 Apr 2018 14:08:52 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7D17D6E509; Tue, 3 Apr 2018 14:08:50 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 03 Apr 2018 07:04:22 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.48,401,1517904000"; d="scan'208";a="30680750" Received: from mint-dev.iind.intel.com ([10.223.25.164]) by orsmga008.jf.intel.com with ESMTP; 03 Apr 2018 07:04:19 -0700 From: Ramalingam C To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, seanpaul@chromium.org, daniel@ffwll.ch, chris@chris-wilson.co.uk, jani.nikula@linux.intel.com, tomas.winkler@intel.com, alexander.usyskin@intel.com Subject: [PATCH v3 10/40] misc/mei/hdcp: Verify H_prime Date: Tue, 3 Apr 2018 19:27:23 +0530 Message-Id: <1522763873-23041-11-git-send-email-ramalingam.c@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1522763873-23041-1-git-send-email-ramalingam.c@intel.com> References: <1522763873-23041-1-git-send-email-ramalingam.c@intel.com> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: rodrigo.vivi@intel.com MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Requests for the verifcation of AKE_Send_H_prime. ME will calculation the H and comparing it with received H_Prime. Here AKE_Send_H_prime is a HDCP2.2 Authentication msg. v2: Rebased. v3: cldev is passed as first parameter [Tomas] Redundant comments and cast are removed [Tomas] Signed-off-by: Ramalingam C --- drivers/misc/mei/hdcp/mei_hdcp.c | 58 ++++++++++++++++++++++++++++++++++++++++ include/linux/mei_hdcp.h | 8 ++++++ 2 files changed, 66 insertions(+) diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index 181994529058..fa548310de7a 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -186,6 +186,64 @@ mei_verify_receiver_cert_prepare_km(struct mei_cl_device *cldev, } EXPORT_SYMBOL(mei_verify_receiver_cert_prepare_km); +/** + * mei_verify_hprime: + * Function to verify AKE_Send_H_prime received + * + * @cldev : Pointer for mei client device + * @data : Intel HW specific Data + * @rx_hprime : Pointer for AKE_Send_H_prime + * @hprime_sz : Input buffer size + * + * Returns 0 on Success, <0 on Failure + */ +int mei_verify_hprime(struct mei_cl_device *cldev, struct mei_hdcp_data *data, + struct hdcp2_ake_send_hprime *rx_hprime) +{ + struct wired_cmd_ake_send_hprime_in send_hprime_in = { { 0 } }; + struct wired_cmd_ake_send_hprime_out send_hprime_out = { { 0 } }; + struct device *dev; + ssize_t byte; + + if (!data || !rx_hprime) + return -EINVAL; + + dev = &cldev->dev; + + send_hprime_in.header.api_version = HDCP_API_VERSION; + send_hprime_in.header.command_id = WIRED_AKE_SEND_HPRIME; + send_hprime_in.header.status = ME_HDCP_STATUS_SUCCESS; + send_hprime_in.header.buffer_len = WIRED_CMD_BUF_LEN_AKE_SEND_HPRIME_IN; + + send_hprime_in.port.integrated_port_type = data->port_type; + send_hprime_in.port.physical_port = data->port; + + memcpy(send_hprime_in.h_prime, rx_hprime->h_prime, + sizeof(rx_hprime->h_prime)); + + byte = mei_cldev_send(cldev, (u8 *)&send_hprime_in, + sizeof(send_hprime_in)); + if (byte < 0) { + dev_dbg(dev, "mei_cldev_send failed. %d\n", (int)byte); + return byte; + } + + byte = mei_cldev_recv(cldev, (u8 *)&send_hprime_out, + sizeof(send_hprime_out)); + if (byte < 0) { + dev_dbg(dev, "mei_cldev_recv failed. %d\n", (int)byte); + return byte; + } + + if (send_hprime_out.header.status != ME_HDCP_STATUS_SUCCESS) { + dev_dbg(dev, "ME cmd 0x%08X Failed. Status: 0x%X\n", + WIRED_AKE_SEND_HPRIME, send_hprime_out.header.status); + return -1; + } + return 0; +} +EXPORT_SYMBOL(mei_verify_hprime); + void mei_cldev_state_notify_clients(struct mei_cl_device *cldev, bool enabled) { if (enabled) diff --git a/include/linux/mei_hdcp.h b/include/linux/mei_hdcp.h index 314b15f6afc0..00bfde251ba4 100644 --- a/include/linux/mei_hdcp.h +++ b/include/linux/mei_hdcp.h @@ -116,6 +116,8 @@ mei_verify_receiver_cert_prepare_km(struct mei_cl_device *cldev, bool *km_stored, struct hdcp2_ake_no_stored_km *ek_pub_km, 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); #else static int mei_cldev_register_notify(struct notifier_block *nb) { @@ -142,5 +144,11 @@ mei_verify_receiver_cert_prepare_km(struct mei_cl_device *cldev, { return -ENODEV; } +static inline +int mei_verify_hprime(struct mei_cl_device *cldev, struct mei_hdcp_data *data, + struct hdcp2_ake_send_hprime *rx_hprime) +{ + return -ENODEV; +} #endif /* defined (CONFIG_INTEL_MEI_HDCP) */ #endif /* defined (_LINUX_MEI_HDCP_H) */