From patchwork Sat Feb 9 07:13:02 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramalingam C X-Patchwork-Id: 10804377 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 3A26A746 for ; Sat, 9 Feb 2019 07:20:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 232CB2C16D for ; Sat, 9 Feb 2019 07:20:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 179322C9B8; Sat, 9 Feb 2019 07:20:48 +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 C0A012C16D for ; Sat, 9 Feb 2019 07:20:47 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1DB1A6EF38; Sat, 9 Feb 2019 07:20:31 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8B1AE6EF25; Sat, 9 Feb 2019 07:20:26 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 08 Feb 2019 23:20:26 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.58,350,1544515200"; d="scan'208";a="137120108" Received: from mint-dev.iind.intel.com ([10.223.25.164]) by orsmga001.jf.intel.com with ESMTP; 08 Feb 2019 23:20:24 -0800 From: Ramalingam C To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, daniel.vetter@ffwll.ch, tomas.winkler@intel.com, uma.shankar@intel.com Subject: [PATCH v12 33/38] misc/mei/hdcp: Enabling the HDCP authentication Date: Sat, 9 Feb 2019 12:43:02 +0530 Message-Id: <1549696387-28268-34-git-send-email-ramalingam.c@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1549696387-28268-1-git-send-email-ramalingam.c@intel.com> References: <1549696387-28268-1-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: , 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 configure a port as authenticated. On Success, ME FW will mark the port as authenticated and provides HDCP cipher with the encryption keys. Enabling the Authentication can be requested once all stages of HDCP2.2 authentication is completed by interacting with ME FW. Only after this stage, driver can enable the HDCP encryption for the port, through HW registers. 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 and typos fixed [Uma] v5: Rebased. v6: Collected the Rb-ed by. Rebased. v7: Adjust to the new mei interface. Fix for Kdoc. v8: K-Doc addition. [Tomas] v9: renamed func as mei_hdcp_* [Tomas] Inline function is defined for DDI index [Tomas] Signed-off-by: Ramalingam C Reviewed-by: Uma Shankar Acked-by: Tomas Winkler --- drivers/misc/mei/hdcp/mei_hdcp.c | 55 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 54 insertions(+), 1 deletion(-) diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index 7d0562c2a773..8ecb3d4cf802 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -600,6 +600,59 @@ static int mei_hdcp_verify_mprime(struct device *dev, return 0; } +/** + * mei_hdcp_enable_authentication() - Mark a port as authenticated + * through ME FW + * @dev: device corresponding to the mei_cl_device + * @hdcp_data: Intel HW specific hdcp data + * + * Return: 0 on Success, <0 on Failure + */ +static int mei_hdcp_enable_authentication(struct device *dev, + struct hdcp_port_data *data) +{ + struct wired_cmd_enable_auth_in enable_auth_in = { { 0 } }; + struct wired_cmd_enable_auth_out enable_auth_out = { { 0 } }; + struct mei_cl_device *cldev; + ssize_t byte; + + if (!dev || !data) + return -EINVAL; + + cldev = to_mei_cl_device(dev); + + enable_auth_in.header.api_version = HDCP_API_VERSION; + enable_auth_in.header.command_id = WIRED_ENABLE_AUTH; + enable_auth_in.header.status = ME_HDCP_STATUS_SUCCESS; + enable_auth_in.header.buffer_len = WIRED_CMD_BUF_LEN_ENABLE_AUTH_IN; + + enable_auth_in.port.integrated_port_type = data->port_type; + enable_auth_in.port.physical_port = mei_get_ddi_index(data->port); + enable_auth_in.stream_type = data->streams[0].stream_type; + + byte = mei_cldev_send(cldev, (u8 *)&enable_auth_in, + sizeof(enable_auth_in)); + if (byte < 0) { + dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte); + return byte; + } + + byte = mei_cldev_recv(cldev, (u8 *)&enable_auth_out, + sizeof(enable_auth_out)); + if (byte < 0) { + dev_dbg(dev, "mei_cldev_recv failed. %zd\n", byte); + return byte; + } + + if (enable_auth_out.header.status != ME_HDCP_STATUS_SUCCESS) { + dev_dbg(dev, "ME cmd 0x%08X failed. status: 0x%X\n", + WIRED_ENABLE_AUTH, enable_auth_out.header.status); + return -EIO; + } + + return 0; +} + static __attribute__((unused)) struct i915_hdcp_component_ops mei_hdcp_ops = { .owner = THIS_MODULE, @@ -614,7 +667,7 @@ struct i915_hdcp_component_ops mei_hdcp_ops = { .repeater_check_flow_prepare_ack = mei_hdcp_repeater_check_flow_prepare_ack, .verify_mprime = mei_hdcp_verify_mprime, - .enable_hdcp_authentication = NULL, + .enable_hdcp_authentication = mei_hdcp_enable_authentication, .close_hdcp_session = NULL, };