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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/edac/sifive_edac.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/edac/sifive_edac.c')
-rw-r--r-- | drivers/edac/sifive_edac.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/drivers/edac/sifive_edac.c b/drivers/edac/sifive_edac.c new file mode 100644 index 000000000..b844e2626 --- /dev/null +++ b/drivers/edac/sifive_edac.c @@ -0,0 +1,119 @@ +// 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"); |