From patchwork Thu Mar 8 11:58:40 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramalingam C X-Patchwork-Id: 10267785 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 99E6C6016D for ; Thu, 8 Mar 2018 12:06:51 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8A15329889 for ; Thu, 8 Mar 2018 12:06:51 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7EA8F298B9; Thu, 8 Mar 2018 12:06:51 +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 0575C29889 for ; Thu, 8 Mar 2018 12:06:51 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E014B6E90E; Thu, 8 Mar 2018 12:05:46 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTPS id B797C6E90B; Thu, 8 Mar 2018 12:05:44 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 08 Mar 2018 04:05:44 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.47,440,1515484800"; d="scan'208";a="32287855" Received: from mint-dev.iind.intel.com ([10.223.25.164]) by FMSMGA003.fm.intel.com with ESMTP; 08 Mar 2018 04:05:41 -0800 From: Ramalingam C To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, seanpaul@chromium.org, chris@chris-wilson.co.uk, tomas.winkler@intel.com, jani.nikula@linux.intel.com Subject: [PATCH v2 13/42] misc/mei/hdcp: Store the HDCP Pairing info Date: Thu, 8 Mar 2018 17:28:40 +0530 Message-Id: <1520510349-8385-14-git-send-email-ramalingam.c@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1520510349-8385-1-git-send-email-ramalingam.c@intel.com> References: <1520510349-8385-1-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: uma.shankar@intel.com, 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 Provides Pairing info to ME to store. Pairing is a process to fast track the subsequent authentication with the same HDCP sink. On Success, received HDCP pairing info is stored in non-volatile memory of ME. v2: Rebased. Signed-off-by: Ramalingam C --- drivers/misc/mei/hdcp/mei_hdcp.c | 66 ++++++++++++++++++++++++++++++++++++++++ include/linux/mei_hdcp.h | 8 +++++ 2 files changed, 74 insertions(+) diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index 37faca9a3cc8..753a6a466611 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -273,6 +273,72 @@ int mei_verify_hprime(struct mei_hdcp_data *data, } EXPORT_SYMBOL(mei_verify_hprime); +/** + * mei_store_pairing_info: + * Function to store pairing info received from panel + * + * @data : Intel HW specific Data + * @pairing_info : Pointer for AKE_Send_Pairing_Info + * + * Returns 0 on Success, <0 on Failure + */ + +int mei_store_pairing_info(struct mei_hdcp_data *data, + struct hdcp2_ake_send_pairing_info *pairing_info) +{ + struct wired_cmd_ake_send_pairing_info_in pairing_info_in = { { 0 } }; + struct wired_cmd_ake_send_pairing_info_out pairing_info_out = { { 0 } }; + enum me_hdcp_status status = ME_HDCP_STATUS_UNKNOWN_ERROR; + struct device *dev; + ssize_t byte; + + if (!data || !pairing_info) + return -EINVAL; + + /* check for the mei_device enabled or not */ + if (!mei_cldev_active_and_enabled(data->cldev)) + return -ENODEV; + + dev = &data->cldev->dev; + + pairing_info_in.header.api_version = HDCP_API_VERSION; + pairing_info_in.header.command_id = WIRED_AKE_SEND_PAIRING_INFO; + pairing_info_in.header.status = ME_HDCP_STATUS_SUCCESS; + pairing_info_in.header.buffer_len = + WIRED_CMD_BUF_LEN_SEND_PAIRING_INFO_IN; + + pairing_info_in.port.integrated_port_type = data->port_type; + pairing_info_in.port.physical_port = data->port; + + memcpy(pairing_info_in.e_kh_km, pairing_info->e_kh_km, + sizeof(pairing_info_in.e_kh_km)); + + /* Request to ME */ + byte = mei_cldev_send(data->cldev, (u8 *)&pairing_info_in, + sizeof(pairing_info_in)); + if (byte < 0) { + dev_err(dev, "mei_cldev_send failed. %d\n", (int)byte); + return byte; + } + + /* Response from ME */ + byte = mei_cldev_recv(data->cldev, (u8 *)&pairing_info_out, + sizeof(pairing_info_out)); + if (byte < 0) { + dev_err(dev, "mei_cldev_recv failed. %d\n", (int)byte); + return byte; + } + + status = (enum me_hdcp_status)pairing_info_out.header.status; + if (status != ME_HDCP_STATUS_SUCCESS) { + dev_err(dev, "ME cmd 0x%08X failed. Status: 0x%X\n", + WIRED_AKE_SEND_PAIRING_INFO, status); + return -1; + } + return 0; +} +EXPORT_SYMBOL(mei_store_pairing_info); + static int mei_hdcp_probe(struct mei_cl_device *cldev, const struct mei_cl_device_id *id) { diff --git a/include/linux/mei_hdcp.h b/include/linux/mei_hdcp.h index 3590e3421134..449ac3af4d53 100644 --- a/include/linux/mei_hdcp.h +++ b/include/linux/mei_hdcp.h @@ -113,6 +113,8 @@ mei_verify_receiver_cert_prepare_km(struct mei_hdcp_data *data, size_t *msg_sz); int mei_verify_hprime(struct mei_hdcp_data *data, struct hdcp2_ake_send_hprime *rx_hprime); +int mei_store_pairing_info(struct mei_hdcp_data *data, + struct hdcp2_ake_send_pairing_info *pairing_info); #else static inline int mei_hdcp_cldev_get_reference(void *client_data, @@ -148,5 +150,11 @@ int mei_verify_hprime(struct mei_hdcp_data *data, { return -ENODEV; } +static inline +int mei_store_pairing_info(struct mei_hdcp_data *data, + struct hdcp2_ake_send_pairing_info *pairing_info) +{ + return -ENODEV; +} #endif /* defined (CONFIG_INTEL_MEI_HDCP) */ #endif /* defined (_LINUX_MEI_HDCP_H) */