From patchwork Thu Jun 17 12:13:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mikko Perttunen X-Patchwork-Id: 12327657 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=-14.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, UNWANTED_LANGUAGE_BODY,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 B3BB1C2B9F4 for ; Thu, 17 Jun 2021 12:14:50 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 81379610EA for ; Thu, 17 Jun 2021 12:14:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 81379610EA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nvidia.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=tRgGBaZhW3vzVZyoQIGNMqbeuODxD3RIWJyvj3vOSBo=; b=Y5cRLyCtp6KJH/ tmXJtTxCx8PkJnyyyeLwmcKjrP9/r3lPWaR6zIrHSk0uuypRfhvOJ/V32Qbg8lxypjfjToqE9i/Ck QH8rpAjzoeA2uY8V3m7MHd9rhQ0qJuWTKUJBE6RnmZ59ipNEDyfys3PJK8Ny2TFAxR7sqDG9Xpdte VTz4ad0Ig5+V4w3XYhMvRBESKz9qGNGNinw1nhj8Y0CiGzXFkoNBAu+zE1rwaPtQBMIt0VhDO9Tt+ e34ooInM+EN/Yn4q2/TQ65Hzt72d0Cleo2rTwoPX9Rlwcdy9g8O0d3+puBjJus8SQrIOgd+LiUsjF evr0OVrxEKhIGBbW5gQA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ltqtc-00AEbR-Fp; Thu, 17 Jun 2021 12:13:20 +0000 Received: from mail.kapsi.fi ([2001:67c:1be8::25]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1ltqtY-00AEa8-J2 for linux-arm-kernel@lists.infradead.org; Thu, 17 Jun 2021 12:13:18 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=kapsi.fi; s=20161220; h=Content-Transfer-Encoding:MIME-Version:Message-Id:Date:Subject :Cc:To:From:Sender:Reply-To:Content-Type:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=9uJYou9eTY5vQhRoyPu0Gb6W2btlkcgZi93WLQabwSQ=; b=x7H34sss7fIG9j92S4sJR814ZO y7g6fB4JHAsnH3InZg2nNgdd6Q0Ux052rPWrsDIEMKLA8Mnz0mEEqWR2V35FUpx3jFYupeF6fGyjs b2ng0Rw2ASLY9wcKvlmFGALTMVuolVo1/joW4hy0QZq3oUqAO6qyNr3tUFKhQIQXwo6RUDQAyZ1JC bUOfLNtjw40bAGoiBqVN4rZfL2qR2rzh6dGDIzDpF8NKtUROESSyQkaorvEnPzTX9wpNcG6zV9V5y XDP2JJSxwJ+/y8c0es+IHS2P+S9GClTTag9KzHaI89dEjHA8zbkR1zysbVQZ77sa9ve1WZLMILUGb fSJ7fVuQ==; Received: from dsl-hkibng22-54f986-236.dhcp.inet.fi ([84.249.134.236] helo=toshino.localdomain) by mail.kapsi.fi with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.89) (envelope-from ) id 1ltqtV-0007KY-6I; Thu, 17 Jun 2021 15:13:13 +0300 From: Mikko Perttunen To: thierry.reding@gmail.com, jonathanh@nvidia.com Cc: linux-tegra@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Mikko Perttunen Subject: [PATCH v2] soc: tegra: Add Tegra186 ARI driver Date: Thu, 17 Jun 2021 15:13:07 +0300 Message-Id: <20210617121307.792386-1-mperttunen@nvidia.com> X-Mailer: git-send-email 2.30.1 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 84.249.134.236 X-SA-Exim-Mail-From: mperttunen@nvidia.com X-SA-Exim-Scanned: No (on mail.kapsi.fi); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210617_051316_827986_FD8F6B8F X-CRM114-Status: GOOD ( 17.64 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add a driver to hook into panic notifiers and print machine check status for debugging. Status information is retrieved via SMC. This is supported by upstream ARM Trusted Firmware. Signed-off-by: Mikko Perttunen --- v2: * Changed to use panic notifier instead of serror hook --- drivers/soc/tegra/Makefile | 1 + drivers/soc/tegra/ari-tegra186.c | 80 ++++++++++++++++++++++++++++++++ 2 files changed, 81 insertions(+) create mode 100644 drivers/soc/tegra/ari-tegra186.c diff --git a/drivers/soc/tegra/Makefile b/drivers/soc/tegra/Makefile index 9c809c1814bd..054e862b63d8 100644 --- a/drivers/soc/tegra/Makefile +++ b/drivers/soc/tegra/Makefile @@ -7,3 +7,4 @@ obj-$(CONFIG_SOC_TEGRA_PMC) += pmc.o obj-$(CONFIG_SOC_TEGRA_POWERGATE_BPMP) += powergate-bpmp.o obj-$(CONFIG_SOC_TEGRA20_VOLTAGE_COUPLER) += regulators-tegra20.o obj-$(CONFIG_SOC_TEGRA30_VOLTAGE_COUPLER) += regulators-tegra30.o +obj-$(CONFIG_ARCH_TEGRA_186_SOC) += ari-tegra186.o diff --git a/drivers/soc/tegra/ari-tegra186.c b/drivers/soc/tegra/ari-tegra186.c new file mode 100644 index 000000000000..02577853ec49 --- /dev/null +++ b/drivers/soc/tegra/ari-tegra186.c @@ -0,0 +1,80 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved. + */ + +#include +#include +#include +#include + +#define SMC_SIP_INVOKE_MCE 0xc2ffff00 +#define MCE_SMC_READ_MCA 12 + +#define MCA_ARI_CMD_RD_SERR 1 + +#define MCA_ARI_RW_SUBIDX_STAT 1 +#define SERR_STATUS_VAL BIT_ULL(63) + +#define MCA_ARI_RW_SUBIDX_ADDR 2 +#define MCA_ARI_RW_SUBIDX_MSC1 3 +#define MCA_ARI_RW_SUBIDX_MSC2 4 + +static const char * const bank_names[] = { + "SYS:DPMU", "ROC:IOB", "ROC:MCB", "ROC:CCE", "ROC:CQX", "ROC:CTU", +}; + +static void read_uncore_mca(u8 cmd, u8 idx, u8 subidx, u8 inst, u64 *data) +{ + struct arm_smccc_res res; + + arm_smccc_smc(SMC_SIP_INVOKE_MCE | MCE_SMC_READ_MCA, + ((u64)inst << 24) | ((u64)idx << 16) | + ((u64)subidx << 8) | ((u64)cmd << 0), + 0, 0, 0, 0, 0, 0, &res); + + *data = res.a2; +} + +static int tegra186_ari_panic_handler(struct notifier_block *nb, + unsigned long code, void *unused) +{ + u64 status; + int i; + + for (i = 0; i < ARRAY_SIZE(bank_names); i++) { + read_uncore_mca(MCA_ARI_CMD_RD_SERR, i, MCA_ARI_RW_SUBIDX_STAT, + 0, &status); + + if (status & SERR_STATUS_VAL) { + u64 addr, misc1, misc2; + + read_uncore_mca(MCA_ARI_CMD_RD_SERR, i, + MCA_ARI_RW_SUBIDX_ADDR, 0, &addr); + read_uncore_mca(MCA_ARI_CMD_RD_SERR, i, + MCA_ARI_RW_SUBIDX_MSC1, 0, &misc1); + read_uncore_mca(MCA_ARI_CMD_RD_SERR, i, + MCA_ARI_RW_SUBIDX_MSC2, 0, &misc2); + + pr_crit("Machine Check Error in %s\n" + " status=0x%llx addr=0x%llx\n" + " msc1=0x%llx msc2=0x%llx\n", + bank_names[i], status, addr, misc1, misc2); + } + } + + return NOTIFY_DONE; +} + +static struct notifier_block tegra186_ari_panic_nb = { + .notifier_call = tegra186_ari_panic_handler, +}; + +static int __init tegra186_ari_init(void) +{ + if (of_machine_is_compatible("nvidia,tegra186")) + atomic_notifier_chain_register(&panic_notifier_list, &tegra186_ari_panic_nb); + + return 0; +} +early_initcall(tegra186_ari_init);