// SPDX-License-Identifier: GPL-2.0 /* * SiFive Platform EDAC Driver * * Copyright (C) 2018-2019 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_l2_cache.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_L2_ERR_TYPE_UE) edac_device_handle_ue(p->dci, 0, 0, msg); else if (event == SIFIVE_L2_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_l2_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_l2_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");