From patchwork Tue Apr 3 13:57:26 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramalingam C X-Patchwork-Id: 10321183 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 7682660318 for ; Tue, 3 Apr 2018 14:10:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 69D3328BCD for ; Tue, 3 Apr 2018 14:10:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 688F728BE2; Tue, 3 Apr 2018 14:10:14 +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 2BB6A28BCD for ; Tue, 3 Apr 2018 14:10:08 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6F4CC6E4F5; Tue, 3 Apr 2018 14:08:54 +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 53DCF6E509; Tue, 3 Apr 2018 14:08:51 +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 07:04:33 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.48,401,1517904000"; d="scan'208";a="30680813" Received: from mint-dev.iind.intel.com ([10.223.25.164]) by orsmga008.jf.intel.com with ESMTP; 03 Apr 2018 07:04:30 -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 13/40] misc/mei/hdcp: Verify L_prime Date: Tue, 3 Apr 2018 19:27:26 +0530 Message-Id: <1522763873-23041-14-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 Request to ME to verify the LPrime received from HDCP sink. On Success, ME FW will verify the received Lprime by calculating and comparing with L. This represents the completion of Locality Check. 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 | 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 9bd7e66a91e4..ea84177311b7 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -361,6 +361,65 @@ int mei_initiate_locality_check(struct mei_cl_device *cldev, } EXPORT_SYMBOL(mei_initiate_locality_check); +/** + * mei_verify_lprime: + * Function to verify lprime. + * + * @cldev : Pointer for mei client device + * @data : Intel HW specific Data + * @rx_lprime : Pointer for LC_Send_L_prime + * + * Returns 0 on Success, <0 on Failure + */ +int mei_verify_lprime(struct mei_cl_device *cldev, struct mei_hdcp_data *data, + struct hdcp2_lc_send_lprime *rx_lprime) +{ + struct wired_cmd_validate_locality_in verify_lprime_in = { { 0 } }; + struct wired_cmd_validate_locality_out verify_lprime_out = { { 0 } }; + struct device *dev; + ssize_t byte; + + if (!data || !rx_lprime) + return -EINVAL; + + dev = &cldev->dev; + + verify_lprime_in.header.api_version = HDCP_API_VERSION; + verify_lprime_in.header.command_id = WIRED_VALIDATE_LOCALITY; + verify_lprime_in.header.status = ME_HDCP_STATUS_SUCCESS; + verify_lprime_in.header.buffer_len = + WIRED_CMD_BUF_LEN_VALIDATE_LOCALITY_IN; + + verify_lprime_in.port.integrated_port_type = data->port_type; + verify_lprime_in.port.physical_port = data->port; + + memcpy(verify_lprime_in.l_prime, rx_lprime->l_prime, + sizeof(rx_lprime->l_prime)); + + byte = mei_cldev_send(cldev, (u8 *)&verify_lprime_in, + sizeof(verify_lprime_in)); + if (byte < 0) { + dev_dbg(dev, "mei_cldev_send failed. %d\n", (int)byte); + return byte; + } + + byte = mei_cldev_recv(cldev, (u8 *)&verify_lprime_out, + sizeof(verify_lprime_out)); + if (byte < 0) { + dev_dbg(dev, "mei_cldev_recv failed. %d\n", (int)byte); + return byte; + } + + if (verify_lprime_out.header.status != ME_HDCP_STATUS_SUCCESS) { + dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n", + WIRED_VALIDATE_LOCALITY, + verify_lprime_out.header.status); + return -1; + } + return 0; +} +EXPORT_SYMBOL(mei_verify_lprime); + 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 d9c4cac0b276..792143563c46 100644 --- a/include/linux/mei_hdcp.h +++ b/include/linux/mei_hdcp.h @@ -124,6 +124,8 @@ int mei_store_pairing_info(struct mei_cl_device *cldev, int mei_initiate_locality_check(struct mei_cl_device *cldev, struct mei_hdcp_data *data, 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); #else static int mei_cldev_register_notify(struct notifier_block *nb) { @@ -170,5 +172,11 @@ int mei_initiate_locality_check(struct mei_cl_device *cldev, { return -ENODEV; } +static inline +int mei_verify_lprime(struct mei_cl_device *cldev, struct mei_hdcp_data *data, + struct hdcp2_lc_send_lprime *rx_lprime) +{ + return -ENODEV; +} #endif /* defined (CONFIG_INTEL_MEI_HDCP) */ #endif /* defined (_LINUX_MEI_HDCP_H) */