From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Return-Path: From: richard.gong@linux.intel.com Subject: [PATCHv11 7/8] Documentation: driver-api: add stratix10 service layer Date: Tue, 13 Nov 2018 12:14:05 -0600 Message-Id: <1542132846-24168-8-git-send-email-richard.gong@linux.intel.com> In-Reply-To: <1542132846-24168-1-git-send-email-richard.gong@linux.intel.com> References: <1542132846-24168-1-git-send-email-richard.gong@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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@linux.intel.com, richard.gong@intel.com List-ID: From: Richard Gong Add Intel Stratix10 service layer driver document Signed-off-by: Richard Gong Signed-off-by: Alan Tull --- v5: this patch is added in patch set version 5, add new file stratix10-svc.rst add stratix10-svc.rst to driver-api/index.rst 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 v11: no change --- .../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: -- 2.7.4