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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