From patchwork Wed Jul 2 23:52:11 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Wood X-Patchwork-Id: 366508 X-Patchwork-Delegate: scottwood@freescale.com Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [103.22.144.68]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id DB5121400DD for ; Thu, 3 Jul 2014 09:53:07 +1000 (EST) Received: from ozlabs.org (ozlabs.org [103.22.144.67]) by lists.ozlabs.org (Postfix) with ESMTP id B4C531A023F for ; Thu, 3 Jul 2014 09:53:07 +1000 (EST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Received: from na01-by2-obe.outbound.protection.outlook.com (mail-by2lp0238.outbound.protection.outlook.com [207.46.163.238]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id DEF1E1A0005 for ; Thu, 3 Jul 2014 09:52:24 +1000 (EST) Received: from home.buserror.net (2601:2:5800:3f7:39f9:17:4960:c198) by BLUPR03MB390.namprd03.prod.outlook.com (10.141.78.19) with Microsoft SMTP Server (TLS) id 15.0.980.8; Wed, 2 Jul 2014 23:52:17 +0000 Date: Wed, 2 Jul 2014 18:52:11 -0500 From: Scott Wood To: Subject: [PATCH v2] memory: Freescale CoreNet Coherency Fabric error reporting driver Message-ID: <20140702235211.GA3898@home.buserror.net> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) X-Originating-IP: [2601:2:5800:3f7:39f9:17:4960:c198] X-ClientProxiedBy: BN1PR08CA0025.namprd08.prod.outlook.com (10.242.217.153) To BLUPR03MB390.namprd03.prod.outlook.com (10.141.78.19) X-Microsoft-Antispam: BCL:0;PCL:0;RULEID: X-Forefront-PRVS: 0260457E99 X-Forefront-Antispam-Report: SFV:NSPM; SFS:(6009001)(189002)(199002)(92566001)(92726001)(53416004)(95666004)(69596002)(77982001)(81342001)(47776003)(20776003)(19580395003)(85306003)(42186005)(80022001)(77096002)(64706001)(83322001)(74662001)(81542001)(46102001)(31966008)(101416001)(575784001)(102836001)(86362001)(83506001)(19580405001)(23726002)(21056001)(50466002)(97756001)(74502001)(99396002)(87976001)(106356001)(83072002)(85852003)(50986999)(33656002)(105586002)(229853001)(76482001)(79102001)(46406003)(54356999)(107046002)(81156004)(2351001)(2004002)(3826002); DIR:OUT; SFP:; SCL:1; SRVR:BLUPR03MB390; H:home.buserror.net; FPR:; MLV:sfv; PTR:InfoNoRecords; MX:1; LANG:en; X-OriginatorOrg: freescale.com Cc: Bharat Bhushan , linux-kernel@vger.kernel.org X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.16 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" The CoreNet Coherency Fabric is part of the memory subsystem on some Freescale QorIQ chips. It can report coherency violations (e.g. due to misusing memory that is mapped noncoherent) as well as transactions that do not hit any local access window, or which hit a local access window with an invalid target ID. Signed-off-by: Scott Wood Reviewed-by: Bharat Bhushan --- v2: - s/cecadr/cecaddr/ to consistently use ccf2 names - fix ERRDET_CTYPE_MASK value - use the ccf2 value for CECADDRH_ADDRH (harmless on ccf1) - add comment explaining why we disable detection on remove for ccf1 but not ccf2 --- arch/powerpc/configs/corenet32_smp_defconfig | 1 + arch/powerpc/configs/corenet64_smp_defconfig | 1 + drivers/memory/Kconfig | 10 ++ drivers/memory/Makefile | 1 + drivers/memory/fsl-corenet-cf.c | 251 +++++++++++++++++++++++++++ 5 files changed, 264 insertions(+) create mode 100644 drivers/memory/fsl-corenet-cf.c diff --git a/arch/powerpc/configs/corenet32_smp_defconfig b/arch/powerpc/configs/corenet32_smp_defconfig index 7d0c837..6a3c58a 100644 --- a/arch/powerpc/configs/corenet32_smp_defconfig +++ b/arch/powerpc/configs/corenet32_smp_defconfig @@ -180,3 +180,4 @@ CONFIG_CRYPTO_SHA512=y CONFIG_CRYPTO_AES=y # CONFIG_CRYPTO_ANSI_CPRNG is not set CONFIG_CRYPTO_DEV_FSL_CAAM=y +CONFIG_FSL_CORENET_CF=y diff --git a/arch/powerpc/configs/corenet64_smp_defconfig b/arch/powerpc/configs/corenet64_smp_defconfig index 6ae07e1..4b07bad 100644 --- a/arch/powerpc/configs/corenet64_smp_defconfig +++ b/arch/powerpc/configs/corenet64_smp_defconfig @@ -179,3 +179,4 @@ CONFIG_CRYPTO_SHA256=y CONFIG_CRYPTO_SHA512=y # CONFIG_CRYPTO_ANSI_CPRNG is not set CONFIG_CRYPTO_DEV_FSL_CAAM=y +CONFIG_FSL_CORENET_CF=y diff --git a/drivers/memory/Kconfig b/drivers/memory/Kconfig index c59e9c9..fab81a1 100644 --- a/drivers/memory/Kconfig +++ b/drivers/memory/Kconfig @@ -61,6 +61,16 @@ config TEGRA30_MC analysis, especially for IOMMU/SMMU(System Memory Management Unit) module. +config FSL_CORENET_CF + tristate "Freescale CoreNet Error Reporting" + depends on FSL_SOC_BOOKE + help + Say Y for reporting of errors from the Freescale CoreNet + Coherency Fabric. Errors reported include accesses to + physical addresses that mapped by no local access window + (LAW) or an invalid LAW, as well as bad cache state that + represents a coherency violation. + config FSL_IFC bool depends on FSL_SOC diff --git a/drivers/memory/Makefile b/drivers/memory/Makefile index 71160a2..4055c47 100644 --- a/drivers/memory/Makefile +++ b/drivers/memory/Makefile @@ -7,6 +7,7 @@ obj-$(CONFIG_OF) += of_memory.o endif obj-$(CONFIG_TI_AEMIF) += ti-aemif.o obj-$(CONFIG_TI_EMIF) += emif.o +obj-$(CONFIG_FSL_CORENET_CF) += fsl-corenet-cf.o obj-$(CONFIG_FSL_IFC) += fsl_ifc.o obj-$(CONFIG_MVEBU_DEVBUS) += mvebu-devbus.o obj-$(CONFIG_TEGRA20_MC) += tegra20-mc.o diff --git a/drivers/memory/fsl-corenet-cf.c b/drivers/memory/fsl-corenet-cf.c new file mode 100644 index 0000000..c9443fc --- /dev/null +++ b/drivers/memory/fsl-corenet-cf.c @@ -0,0 +1,251 @@ +/* + * CoreNet Coherency Fabric error reporting + * + * Copyright 2014 Freescale Semiconductor Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +enum ccf_version { + CCF1, + CCF2, +}; + +struct ccf_info { + enum ccf_version version; + int err_reg_offs; +}; + +static const struct ccf_info ccf1_info = { + .version = CCF1, + .err_reg_offs = 0xa00, +}; + +static const struct ccf_info ccf2_info = { + .version = CCF2, + .err_reg_offs = 0xe40, +}; + +static const struct of_device_id ccf_matches[] = { + { + .compatible = "fsl,corenet1-cf", + .data = &ccf1_info, + }, + { + .compatible = "fsl,corenet2-cf", + .data = &ccf2_info, + }, + {} +}; + +struct ccf_err_regs { + u32 errdet; /* 0x00 Error Detect Register */ + /* 0x04 Error Enable (ccf1)/Disable (ccf2) Register */ + u32 errdis; + /* 0x08 Error Interrupt Enable Register (ccf2 only) */ + u32 errinten; + u32 cecar; /* 0x0c Error Capture Attribute Register */ + u32 cecaddrh; /* 0x10 Error Capture Address High */ + u32 cecaddrl; /* 0x14 Error Capture Address Low */ + u32 cecar2; /* 0x18 Error Capture Attribute Register 2 */ +}; + +/* LAE/CV also valid for errdis and errinten */ +#define ERRDET_LAE (1 << 0) /* Local Access Error */ +#define ERRDET_CV (1 << 1) /* Coherency Violation */ +#define ERRDET_CTYPE_SHIFT 26 /* Capture Type (ccf2 only) */ +#define ERRDET_CTYPE_MASK (0x1f << ERRDET_CTYPE_SHIFT) +#define ERRDET_CAP (1 << 31) /* Capture Valid (ccf2 only) */ + +#define CECAR_VAL (1 << 0) /* Valid (ccf1 only) */ +#define CECAR_UVT (1 << 15) /* Unavailable target ID (ccf1) */ +#define CECAR_SRCID_SHIFT_CCF1 24 +#define CECAR_SRCID_MASK_CCF1 (0xff << CECAR_SRCID_SHIFT_CCF1) +#define CECAR_SRCID_SHIFT_CCF2 18 +#define CECAR_SRCID_MASK_CCF2 (0xff << CECAR_SRCID_SHIFT_CCF2) + +#define CECADDRH_ADDRH 0xff + +struct ccf_private { + const struct ccf_info *info; + struct device *dev; + void __iomem *regs; + struct ccf_err_regs __iomem *err_regs; +}; + +static irqreturn_t ccf_irq(int irq, void *dev_id) +{ + struct ccf_private *ccf = dev_id; + static DEFINE_RATELIMIT_STATE(ratelimit, DEFAULT_RATELIMIT_INTERVAL, + DEFAULT_RATELIMIT_BURST); + u32 errdet, cecar, cecar2; + u64 addr; + u32 src_id; + bool uvt = false; + bool cap_valid = false; + + errdet = ioread32be(&ccf->err_regs->errdet); + cecar = ioread32be(&ccf->err_regs->cecar); + cecar2 = ioread32be(&ccf->err_regs->cecar2); + addr = ioread32be(&ccf->err_regs->cecaddrl); + addr |= ((u64)(ioread32be(&ccf->err_regs->cecaddrh) & + CECADDRH_ADDRH)) << 32; + + if (!__ratelimit(&ratelimit)) + goto out; + + switch (ccf->info->version) { + case CCF1: + if (cecar & CECAR_VAL) { + if (cecar & CECAR_UVT) + uvt = true; + + src_id = (cecar & CECAR_SRCID_MASK_CCF1) >> + CECAR_SRCID_SHIFT_CCF1; + cap_valid = true; + } + + break; + case CCF2: + if (errdet & ERRDET_CAP) { + src_id = (cecar & CECAR_SRCID_MASK_CCF2) >> + CECAR_SRCID_SHIFT_CCF2; + cap_valid = true; + } + + break; + } + + dev_crit(ccf->dev, "errdet 0x%08x cecar 0x%08x cecar2 0x%08x\n", + errdet, cecar, cecar2); + + if (errdet & ERRDET_LAE) { + if (uvt) + dev_crit(ccf->dev, "LAW Unavailable Target ID\n"); + else + dev_crit(ccf->dev, "Local Access Window Error\n"); + } + + if (errdet & ERRDET_CV) + dev_crit(ccf->dev, "Coherency Violation\n"); + + if (cap_valid) { + dev_crit(ccf->dev, "address 0x%09llx, src id 0x%x\n", + addr, src_id); + } + +out: + iowrite32be(errdet, &ccf->err_regs->errdet); + return errdet ? IRQ_HANDLED : IRQ_NONE; +} + +static int ccf_probe(struct platform_device *pdev) +{ + struct ccf_private *ccf; + struct resource *r; + const struct of_device_id *match; + int ret, irq; + + match = of_match_device(ccf_matches, &pdev->dev); + if (WARN_ON(!match)) + return -ENODEV; + + ccf = devm_kzalloc(&pdev->dev, sizeof(*ccf), GFP_KERNEL); + if (!ccf) + return -ENOMEM; + + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!r) { + dev_err(&pdev->dev, "%s: no mem resource\n", __func__); + return -ENXIO; + } + + ccf->regs = devm_ioremap_resource(&pdev->dev, r); + if (IS_ERR(ccf->regs)) { + dev_err(&pdev->dev, "%s: can't map mem resource\n", __func__); + return PTR_ERR(ccf->regs); + } + + ccf->dev = &pdev->dev; + ccf->info = match->data; + ccf->err_regs = ccf->regs + ccf->info->err_reg_offs; + + dev_set_drvdata(&pdev->dev, ccf); + + irq = platform_get_irq(pdev, 0); + if (!irq) { + dev_err(&pdev->dev, "%s: no irq\n", __func__); + return -ENXIO; + } + + ret = devm_request_irq(&pdev->dev, irq, ccf_irq, 0, pdev->name, ccf); + if (ret) { + dev_err(&pdev->dev, "%s: can't request irq\n", __func__); + return ret; + } + + switch (ccf->info->version) { + case CCF1: + /* On CCF1 this register enables rather than disables. */ + iowrite32be(ERRDET_LAE | ERRDET_CV, &ccf->err_regs->errdis); + break; + + case CCF2: + iowrite32be(0, &ccf->err_regs->errdis); + iowrite32be(ERRDET_LAE | ERRDET_CV, &ccf->err_regs->errinten); + break; + } + + return 0; +} + +static int ccf_remove(struct platform_device *pdev) +{ + struct ccf_private *ccf = dev_get_drvdata(&pdev->dev); + + switch (ccf->info->version) { + case CCF1: + iowrite32be(0, &ccf->err_regs->errdis); + break; + + case CCF2: + /* + * We clear errdis on ccf1 because that's the only way to + * disable interrupts, but on ccf2 there's no need to disable + * detection. + */ + iowrite32be(0, &ccf->err_regs->errinten); + break; + } + + return 0; +} + +static struct platform_driver ccf_driver = { + .driver = { + .name = KBUILD_MODNAME, + .owner = THIS_MODULE, + .of_match_table = ccf_matches, + }, + .probe = ccf_probe, + .remove = ccf_remove, +}; + +module_platform_driver(ccf_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Freescale Semiconductor"); +MODULE_DESCRIPTION("Freescale CoreNet Coherency Fabric error reporting");