From patchwork Thu Sep 27 06:55:21 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramalingam C X-Patchwork-Id: 10617465 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 45F97112B for ; Thu, 27 Sep 2018 07:02:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 348472B099 for ; Thu, 27 Sep 2018 07:02:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 28CF92B09F; Thu, 27 Sep 2018 07:02:14 +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=-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 CCD1F2B099 for ; Thu, 27 Sep 2018 07:02:13 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6C7DD6E4CB; Thu, 27 Sep 2018 06:59:21 +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 EDEA26E56F; Thu, 27 Sep 2018 06:59:15 +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 23:59:15 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,309,1534834800"; d="scan'208";a="95204909" Received: from mint-dev.iind.intel.com ([10.223.25.164]) by orsmga002.jf.intel.com with ESMTP; 26 Sep 2018 23:59:13 -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 12:25:21 +0530 Message-Id: <1538031330-21040-31-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 30/39] misc/mei/hdcp: Verify L_prime 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 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] 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 | 62 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 61 insertions(+), 1 deletion(-) diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index ab1aed39d5a4..3ae50240c656 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -340,6 +340,66 @@ static int mei_initiate_locality_check(struct mei_cl_device *cldev, return 0; } +/* + * 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 + */ +static 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. %zd\n", 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. %zd\n", 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 -EIO; + } + + return 0; +} + static __attribute__((unused)) struct i915_hdcp_component_ops mei_hdcp_ops = { .owner = THIS_MODULE, @@ -349,7 +409,7 @@ struct i915_hdcp_component_ops mei_hdcp_ops = { .verify_hprime = mei_verify_hprime, .store_pairing_info = mei_store_pairing_info, .initiate_locality_check = mei_initiate_locality_check, - .verify_lprime = NULL, + .verify_lprime = mei_verify_lprime, .get_session_key = NULL, .repeater_check_flow_prepare_ack = NULL, .verify_mprime = NULL,