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- // SPDX-License-Identifier: GPL-2.0
- /*
- * SiFive Platform EDAC Driver
- *
- * Copyright (C) 2018-2022 SiFive, Inc.
- *
- * This driver is partially based on octeon_edac-pc.c
- *
- */
- #include <linux/edac.h>
- #include <linux/platform_device.h>
- #include "edac_module.h"
- #include <soc/sifive/sifive_ccache.h>
- #define DRVNAME "sifive_edac"
- struct sifive_edac_priv {
- struct notifier_block notifier;
- struct edac_device_ctl_info *dci;
- };
- /*
- * EDAC error callback
- *
- * @event: non-zero if unrecoverable.
- */
- static
- int ecc_err_event(struct notifier_block *this, unsigned long event, void *ptr)
- {
- const char *msg = (char *)ptr;
- struct sifive_edac_priv *p;
- p = container_of(this, struct sifive_edac_priv, notifier);
- if (event == SIFIVE_CCACHE_ERR_TYPE_UE)
- edac_device_handle_ue(p->dci, 0, 0, msg);
- else if (event == SIFIVE_CCACHE_ERR_TYPE_CE)
- edac_device_handle_ce(p->dci, 0, 0, msg);
- return NOTIFY_OK;
- }
- static int ecc_register(struct platform_device *pdev)
- {
- struct sifive_edac_priv *p;
- p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
- if (!p)
- return -ENOMEM;
- p->notifier.notifier_call = ecc_err_event;
- platform_set_drvdata(pdev, p);
- p->dci = edac_device_alloc_ctl_info(0, "sifive_ecc", 1, "sifive_ecc",
- 1, 1, NULL, 0,
- edac_device_alloc_index());
- if (!p->dci)
- return -ENOMEM;
- p->dci->dev = &pdev->dev;
- p->dci->mod_name = "Sifive ECC Manager";
- p->dci->ctl_name = dev_name(&pdev->dev);
- p->dci->dev_name = dev_name(&pdev->dev);
- if (edac_device_add_device(p->dci)) {
- dev_err(p->dci->dev, "failed to register with EDAC core\n");
- goto err;
- }
- register_sifive_ccache_error_notifier(&p->notifier);
- return 0;
- err:
- edac_device_free_ctl_info(p->dci);
- return -ENXIO;
- }
- static int ecc_unregister(struct platform_device *pdev)
- {
- struct sifive_edac_priv *p = platform_get_drvdata(pdev);
- unregister_sifive_ccache_error_notifier(&p->notifier);
- edac_device_del_device(&pdev->dev);
- edac_device_free_ctl_info(p->dci);
- return 0;
- }
- static struct platform_device *sifive_pdev;
- static int __init sifive_edac_init(void)
- {
- int ret;
- sifive_pdev = platform_device_register_simple(DRVNAME, 0, NULL, 0);
- if (IS_ERR(sifive_pdev))
- return PTR_ERR(sifive_pdev);
- ret = ecc_register(sifive_pdev);
- if (ret)
- platform_device_unregister(sifive_pdev);
- return ret;
- }
- static void __exit sifive_edac_exit(void)
- {
- ecc_unregister(sifive_pdev);
- platform_device_unregister(sifive_pdev);
- }
- module_init(sifive_edac_init);
- module_exit(sifive_edac_exit);
- MODULE_AUTHOR("SiFive Inc.");
- MODULE_DESCRIPTION("SiFive platform EDAC driver");
- MODULE_LICENSE("GPL v2");
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