From patchwork Tue Jan 5 23:08:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Russ Weight X-Patchwork-Id: 12000515 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C3CC6C43381 for ; Tue, 5 Jan 2021 23:10:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9FC4E22E00 for ; Tue, 5 Jan 2021 23:10:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727742AbhAEXKN (ORCPT ); Tue, 5 Jan 2021 18:10:13 -0500 Received: from mga04.intel.com ([192.55.52.120]:9395 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728556AbhAEXKJ (ORCPT ); Tue, 5 Jan 2021 18:10:09 -0500 IronPort-SDR: vvZjO5N/U7k7YCUPUJPWofT7cP5WsiSlx6BDhdOkuUbqsroJAUfT2x34NgTRhDS2+qM3GXk3dt mD4edAq/Fhnw== X-IronPort-AV: E=McAfee;i="6000,8403,9855"; a="174618333" X-IronPort-AV: E=Sophos;i="5.78,478,1599548400"; d="scan'208";a="174618333" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Jan 2021 15:09:01 -0800 IronPort-SDR: vg65Dvs9S4ZITCCJ0j7/nveeIBD3T1VFRrzNtcR137UZB0x92PvyIHjEKcg6x8oIbMEvZFLe5q QbMFYGiSItMQ== X-IronPort-AV: E=Sophos;i="5.78,478,1599548400"; d="scan'208";a="350566832" Received: from rhweight-mobl2.amr.corp.intel.com (HELO rhweight-mobl2.ra.intel.com) ([10.209.23.122]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Jan 2021 15:09:01 -0800 From: Russ Weight To: mdf@kernel.org, lee.jones@linaro.org, linux-fpga@vger.kernel.org, linux-kernel@vger.kernel.org Cc: trix@redhat.com, lgoncalv@redhat.com, yilun.xu@intel.com, hao.wu@intel.com, matthew.gerlach@intel.com, Russ Weight Subject: [PATCH v7 6/6] fpga: m10bmc-sec: add max10 get_hw_errinfo callback func Date: Tue, 5 Jan 2021 15:08:55 -0800 Message-Id: <20210105230855.15019-7-russell.h.weight@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210105230855.15019-1-russell.h.weight@intel.com> References: <20210105230855.15019-1-russell.h.weight@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fpga@vger.kernel.org Extend the MAX10 BMC Secure Update driver to include a function that returns 64 bits of additional HW specific data for errors that require additional information. This callback function enables the hw_errinfo sysfs node in the Intel Security Manager class driver. Signed-off-by: Russ Weight --- v7: - No change v6: - Initialized auth_result and doorbell to HW_ERRINFO_POISON in m10bmc_sec_hw_errinfo() and removed unnecessary if statements. v5: - No change v4: - No change v3: - Changed: iops -> sops, imgr -> smgr, IFPGA_ -> FPGA_, ifpga_ to fpga_ - Changed "MAX10 BMC Secure Engine driver" to "MAX10 BMC Secure Update driver" v2: - Implemented HW_ERRINFO_POISON for m10bmc_sec_hw_errinfo() to ensure that corresponding bits are set to 1 if we are unable to read the doorbell or auth_result registers. - Added m10bmc_ prefix to functions in m10bmc_iops structure drivers/fpga/intel-m10-bmc-secure.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/drivers/fpga/intel-m10-bmc-secure.c b/drivers/fpga/intel-m10-bmc-secure.c index a290fcc4df4a..3a049c98cf43 100644 --- a/drivers/fpga/intel-m10-bmc-secure.c +++ b/drivers/fpga/intel-m10-bmc-secure.c @@ -476,11 +476,33 @@ static enum fpga_sec_err m10bmc_sec_cancel(struct fpga_sec_mgr *smgr) return ret ? FPGA_SEC_ERR_RW_ERROR : FPGA_SEC_ERR_NONE; } +#define HW_ERRINFO_POISON GENMASK(31, 0) +static u64 m10bmc_sec_hw_errinfo(struct fpga_sec_mgr *smgr) +{ + struct m10bmc_sec *sec = smgr->priv; + u32 auth_result = HW_ERRINFO_POISON; + u32 doorbell = HW_ERRINFO_POISON; + + switch (smgr->err_code) { + case FPGA_SEC_ERR_HW_ERROR: + case FPGA_SEC_ERR_TIMEOUT: + case FPGA_SEC_ERR_BUSY: + case FPGA_SEC_ERR_WEAROUT: + m10bmc_sys_read(sec->m10bmc, M10BMC_DOORBELL, &doorbell); + m10bmc_sys_read(sec->m10bmc, M10BMC_AUTH_RESULT, &auth_result); + + return (u64)doorbell << 32 | (u64)auth_result; + default: + return 0; + } +} + static const struct fpga_sec_mgr_ops m10bmc_sops = { .prepare = m10bmc_sec_prepare, .write_blk = m10bmc_sec_write_blk, .poll_complete = m10bmc_sec_poll_complete, .cancel = m10bmc_sec_cancel, + .get_hw_errinfo = m10bmc_sec_hw_errinfo, }; static int m10bmc_secure_probe(struct platform_device *pdev)