From patchwork Tue Nov 6 16:52:51 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Richard Gong X-Patchwork-Id: 10670821 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 CB95E1751 for ; Tue, 6 Nov 2018 16:47:15 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BB0652852E for ; Tue, 6 Nov 2018 16:47:15 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AC7A22A2B8; Tue, 6 Nov 2018 16:47:15 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 520FB2852E for ; Tue, 6 Nov 2018 16:47:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389380AbeKGCNG (ORCPT ); Tue, 6 Nov 2018 21:13:06 -0500 Received: from mga07.intel.com ([134.134.136.100]:48209 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388935AbeKGCNG (ORCPT ); Tue, 6 Nov 2018 21:13:06 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 06 Nov 2018 08:47:02 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,472,1534834800"; d="scan'208";a="83756063" Received: from marshy.an.intel.com ([10.122.105.159]) by fmsmga007.fm.intel.com with ESMTP; 06 Nov 2018 08:47:01 -0800 From: richard.gong@linux.intel.com To: gregkh@linuxfoundation.org, catalin.marinas@arm.com, will.deacon@arm.com, dinguyen@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com, atull@kernel.org, mdf@kernel.org, arnd@arndb.de, corbet@lwn.net Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-fpga@vger.kernel.org, linux-doc@vger.kernel.org, todd.riffel@intel.com, richard.gong@intel.com Subject: [PATCHv10 7/8] Documentation: driver-api: add stratix10 service layer Date: Tue, 6 Nov 2018 10:52:51 -0600 Message-Id: <1541523172-5171-8-git-send-email-richard.gong@linux.intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1541523172-5171-1-git-send-email-richard.gong@linux.intel.com> References: <1541523172-5171-1-git-send-email-richard.gong@linux.intel.com> MIME-Version: 1.0 Sender: linux-fpga-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fpga@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Richard Gong Add new file stratix10-svc.rst Add stratix10-svc.rst to driver-api/index.rst Signed-off-by: Richard Gong Signed-off-by: Alan Tull --- v5: this patch is added in patch set version 5 v6: no change v7: no change v8: no change v9: no change v10: add stratix10 service layer document to other firmware interface, and then remove stratix10-svc.rst file --- .../driver-api/firmware/other_interfaces.rst | 30 ++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/Documentation/driver-api/firmware/other_interfaces.rst b/Documentation/driver-api/firmware/other_interfaces.rst index 36c47b1..a4ac54b 100644 --- a/Documentation/driver-api/firmware/other_interfaces.rst +++ b/Documentation/driver-api/firmware/other_interfaces.rst @@ -13,3 +13,33 @@ EDD Interfaces .. kernel-doc:: drivers/firmware/edd.c :internal: +Intel Stratix10 SoC Service Layer +--------------------------------- +Some features of the Intel Stratix10 SoC require a level of privilege +higher than the kernel is granted. Such secure features include +FPGA programming. In terms of the ARMv8 architecture, the kernel runs +at Exception Level 1 (EL1), access to the features requires +Exception Level 3 (EL3). + +The Intel Stratix10 SoC service layer provides an in kernel API for +drivers to request access to the secure features. The requests are queued +and processed one by one. ARM’s SMCCC is used to pass the execution +of the requests on to a secure monitor (EL3). + +.. kernel-doc:: include/linux/firmware/intel/stratix10-svc-client.h + :functions: stratix10_svc_command_code + +.. kernel-doc:: include/linux/firmware/intel/stratix10-svc-client.h + :functions: stratix10_svc_client_msg + +.. kernel-doc:: include/linux/firmware/intel/stratix10-svc-client.h + :functions: stratix10_svc_command_reconfig_payload + +.. kernel-doc:: include/linux/firmware/intel/stratix10-svc-client.h + :functions: stratix10_svc_cb_data + +.. kernel-doc:: include/linux/firmware/intel/stratix10-svc-client.h + :functions: stratix10_svc_client + +.. kernel-doc:: drivers/firmware/stratix10-svc.c + :export: