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Add an EDAC driver for SiFive SoCs. The initial version supports ECC event monitoring and reporting through the EDAC framework for the SiFive L2 cache controller. It registers for notifier events from the L2 cache controller driver (arch/riscv/mm/sifive_l2_cache.c) for L2 ECC events. [ bp: Massage commit message. ] Signed-off-by: Yash Shah <yash.shah@sifive.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: James Morse <james.morse@arm.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: linux-edac <linux-edac@vger.kernel.org> Cc: linux-riscv@lists.infradead.org Cc: Mauro Carvalho Chehab <mchehab@kernel.org> Cc: Nicolas Ferre <nicolas.ferre@microchip.com> Cc: Palmer Dabbelt <palmer@sifive.com> Cc: "Paul E. McKenney" <paulmck@linux.ibm.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: sachin.ghadi@sifive.com Link: https://lkml.kernel.org/r/1557142026-15949-2-git-send-email-yash.shah@sifive.com
120 lines
2.5 KiB
C
120 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* SiFive Platform EDAC Driver
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*
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* Copyright (C) 2018-2019 SiFive, Inc.
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*
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* This driver is partially based on octeon_edac-pc.c
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*
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*/
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#include <linux/edac.h>
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#include <linux/platform_device.h>
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#include "edac_module.h"
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#include <asm/sifive_l2_cache.h>
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#define DRVNAME "sifive_edac"
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struct sifive_edac_priv {
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struct notifier_block notifier;
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struct edac_device_ctl_info *dci;
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};
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/**
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* EDAC error callback
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*
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* @event: non-zero if unrecoverable.
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*/
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static
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int ecc_err_event(struct notifier_block *this, unsigned long event, void *ptr)
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{
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const char *msg = (char *)ptr;
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struct sifive_edac_priv *p;
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p = container_of(this, struct sifive_edac_priv, notifier);
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if (event == SIFIVE_L2_ERR_TYPE_UE)
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edac_device_handle_ue(p->dci, 0, 0, msg);
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else if (event == SIFIVE_L2_ERR_TYPE_CE)
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edac_device_handle_ce(p->dci, 0, 0, msg);
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return NOTIFY_OK;
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}
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static int ecc_register(struct platform_device *pdev)
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{
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struct sifive_edac_priv *p;
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p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
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if (!p)
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return -ENOMEM;
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p->notifier.notifier_call = ecc_err_event;
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platform_set_drvdata(pdev, p);
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p->dci = edac_device_alloc_ctl_info(0, "sifive_ecc", 1, "sifive_ecc",
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1, 1, NULL, 0,
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edac_device_alloc_index());
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if (IS_ERR(p->dci))
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return PTR_ERR(p->dci);
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p->dci->dev = &pdev->dev;
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p->dci->mod_name = "Sifive ECC Manager";
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p->dci->ctl_name = dev_name(&pdev->dev);
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p->dci->dev_name = dev_name(&pdev->dev);
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if (edac_device_add_device(p->dci)) {
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dev_err(p->dci->dev, "failed to register with EDAC core\n");
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goto err;
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}
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register_sifive_l2_error_notifier(&p->notifier);
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return 0;
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err:
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edac_device_free_ctl_info(p->dci);
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return -ENXIO;
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}
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static int ecc_unregister(struct platform_device *pdev)
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{
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struct sifive_edac_priv *p = platform_get_drvdata(pdev);
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unregister_sifive_l2_error_notifier(&p->notifier);
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edac_device_del_device(&pdev->dev);
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edac_device_free_ctl_info(p->dci);
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return 0;
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}
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static struct platform_device *sifive_pdev;
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static int __init sifive_edac_init(void)
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{
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int ret;
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sifive_pdev = platform_device_register_simple(DRVNAME, 0, NULL, 0);
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if (IS_ERR(sifive_pdev))
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return PTR_ERR(sifive_pdev);
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ret = ecc_register(sifive_pdev);
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if (ret)
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platform_device_unregister(sifive_pdev);
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return ret;
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}
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static void __exit sifive_edac_exit(void)
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{
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ecc_unregister(sifive_pdev);
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platform_device_unregister(sifive_pdev);
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}
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module_init(sifive_edac_init);
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module_exit(sifive_edac_exit);
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MODULE_AUTHOR("SiFive Inc.");
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MODULE_DESCRIPTION("SiFive platform EDAC driver");
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MODULE_LICENSE("GPL v2");
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