From patchwork Tue Oct 19 23:15:44 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Russ Weight X-Patchwork-Id: 12571325 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 22A37C433F5 for ; Tue, 19 Oct 2021 23:16:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 09F2161156 for ; Tue, 19 Oct 2021 23:16:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229915AbhJSXSp (ORCPT ); Tue, 19 Oct 2021 19:18:45 -0400 Received: from mga17.intel.com ([192.55.52.151]:7453 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229888AbhJSXSo (ORCPT ); Tue, 19 Oct 2021 19:18:44 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10142"; a="209445777" X-IronPort-AV: E=Sophos;i="5.87,164,1631602800"; d="scan'208";a="209445777" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Oct 2021 16:15:52 -0700 X-IronPort-AV: E=Sophos;i="5.87,164,1631602800"; d="scan'208";a="567152177" Received: from rhweight-mobl.amr.corp.intel.com (HELO rhweight-mobl.ra.intel.com) ([10.212.183.7]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Oct 2021 16:15:50 -0700 From: Russ Weight To: mdf@kernel.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 v1 1/2] fpga: dfl: afu: Clear port errors in afu init Date: Tue, 19 Oct 2021 16:15:44 -0700 Message-Id: <20211019231545.47118-2-russell.h.weight@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211019231545.47118-1-russell.h.weight@intel.com> References: <20211019231545.47118-1-russell.h.weight@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fpga@vger.kernel.org When the AFU driver initializes, log any pre-existing errors and clear them. Signed-off-by: Russ Weight --- drivers/fpga/dfl-afu-error.c | 26 ++++++++++++++++---------- 1 file changed, 16 insertions(+), 10 deletions(-) diff --git a/drivers/fpga/dfl-afu-error.c b/drivers/fpga/dfl-afu-error.c index ab7be6217368..0dc60bf49902 100644 --- a/drivers/fpga/dfl-afu-error.c +++ b/drivers/fpga/dfl-afu-error.c @@ -47,13 +47,13 @@ static void afu_port_err_mask(struct device *dev, bool mask) } /* clear port errors. */ -static int afu_port_err_clear(struct device *dev, u64 err) +static int afu_port_err_clear(struct device *dev, u64 err, bool clear_all) { struct dfl_feature_platform_data *pdata = dev_get_platdata(dev); struct platform_device *pdev = to_platform_device(dev); + u64 v, port_error, port_first_error; void __iomem *base_err, *base_hdr; int enable_ret = 0, ret = -EBUSY; - u64 v; base_err = dfl_get_feature_ioaddr_by_id(dev, PORT_FEATURE_ID_ERROR); base_hdr = dfl_get_feature_ioaddr_by_id(dev, PORT_FEATURE_ID_HEADER); @@ -88,16 +88,21 @@ static int afu_port_err_clear(struct device *dev, u64 err) __afu_port_err_mask(dev, true); /* Clear errors if err input matches with current port errors.*/ - v = readq(base_err + PORT_ERROR); + port_error = readq(base_err + PORT_ERROR); - if (v == err) { - writeq(v, base_err + PORT_ERROR); + if (clear_all || port_error == err) { + port_first_error = readq(base_err + PORT_FIRST_ERROR); - v = readq(base_err + PORT_FIRST_ERROR); - writeq(v, base_err + PORT_FIRST_ERROR); + if (clear_all && (port_error || port_first_error)) + dev_warn(dev, + "Port Error: 0x%llx, First Error 0x%llx\n", + port_error, port_first_error); + + writeq(port_error, base_err + PORT_ERROR); + writeq(port_first_error, base_err + PORT_FIRST_ERROR); } else { dev_warn(dev, "%s: received 0x%llx, expected 0x%llx\n", - __func__, v, err); + __func__, port_error, err); ret = -EINVAL; } @@ -137,7 +142,7 @@ static ssize_t errors_store(struct device *dev, struct device_attribute *attr, if (kstrtou64(buff, 0, &value)) return -EINVAL; - ret = afu_port_err_clear(dev, value); + ret = afu_port_err_clear(dev, value, false); return ret ? ret : count; } @@ -211,7 +216,8 @@ const struct attribute_group port_err_group = { static int port_err_init(struct platform_device *pdev, struct dfl_feature *feature) { - afu_port_err_mask(&pdev->dev, false); + if (afu_port_err_clear(&pdev->dev, 0, true)) + afu_port_err_mask(&pdev->dev, false); return 0; }