]> Git Repo - J-linux.git/blob - drivers/edac/sifive_edac.c
Merge tag 'vfs-6.13-rc7.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
[J-linux.git] / drivers / edac / sifive_edac.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * SiFive Platform EDAC Driver
4  *
5  * Copyright (C) 2018-2022 SiFive, Inc.
6  *
7  * This driver is partially based on octeon_edac-pc.c
8  *
9  */
10 #include <linux/edac.h>
11 #include <linux/platform_device.h>
12 #include "edac_module.h"
13 #include <soc/sifive/sifive_ccache.h>
14
15 #define DRVNAME "sifive_edac"
16
17 struct sifive_edac_priv {
18         struct notifier_block notifier;
19         struct edac_device_ctl_info *dci;
20 };
21
22 /*
23  * EDAC error callback
24  *
25  * @event: non-zero if unrecoverable.
26  */
27 static
28 int ecc_err_event(struct notifier_block *this, unsigned long event, void *ptr)
29 {
30         const char *msg = (char *)ptr;
31         struct sifive_edac_priv *p;
32
33         p = container_of(this, struct sifive_edac_priv, notifier);
34
35         if (event == SIFIVE_CCACHE_ERR_TYPE_UE)
36                 edac_device_handle_ue(p->dci, 0, 0, msg);
37         else if (event == SIFIVE_CCACHE_ERR_TYPE_CE)
38                 edac_device_handle_ce(p->dci, 0, 0, msg);
39
40         return NOTIFY_OK;
41 }
42
43 static int ecc_register(struct platform_device *pdev)
44 {
45         struct sifive_edac_priv *p;
46
47         p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
48         if (!p)
49                 return -ENOMEM;
50
51         p->notifier.notifier_call = ecc_err_event;
52         platform_set_drvdata(pdev, p);
53
54         p->dci = edac_device_alloc_ctl_info(0, "sifive_ecc", 1, "sifive_ecc",
55                                             1, 1, edac_device_alloc_index());
56         if (!p->dci)
57                 return -ENOMEM;
58
59         p->dci->dev = &pdev->dev;
60         p->dci->mod_name = "Sifive ECC Manager";
61         p->dci->ctl_name = dev_name(&pdev->dev);
62         p->dci->dev_name = dev_name(&pdev->dev);
63
64         if (edac_device_add_device(p->dci)) {
65                 dev_err(p->dci->dev, "failed to register with EDAC core\n");
66                 goto err;
67         }
68
69         register_sifive_ccache_error_notifier(&p->notifier);
70
71         return 0;
72
73 err:
74         edac_device_free_ctl_info(p->dci);
75
76         return -ENXIO;
77 }
78
79 static int ecc_unregister(struct platform_device *pdev)
80 {
81         struct sifive_edac_priv *p = platform_get_drvdata(pdev);
82
83         unregister_sifive_ccache_error_notifier(&p->notifier);
84         edac_device_del_device(&pdev->dev);
85         edac_device_free_ctl_info(p->dci);
86
87         return 0;
88 }
89
90 static struct platform_device *sifive_pdev;
91
92 static int __init sifive_edac_init(void)
93 {
94         int ret;
95
96         sifive_pdev = platform_device_register_simple(DRVNAME, 0, NULL, 0);
97         if (IS_ERR(sifive_pdev))
98                 return PTR_ERR(sifive_pdev);
99
100         ret = ecc_register(sifive_pdev);
101         if (ret)
102                 platform_device_unregister(sifive_pdev);
103
104         return ret;
105 }
106
107 static void __exit sifive_edac_exit(void)
108 {
109         ecc_unregister(sifive_pdev);
110         platform_device_unregister(sifive_pdev);
111 }
112
113 module_init(sifive_edac_init);
114 module_exit(sifive_edac_exit);
115
116 MODULE_AUTHOR("SiFive Inc.");
117 MODULE_DESCRIPTION("SiFive platform EDAC driver");
118 MODULE_LICENSE("GPL v2");
This page took 0.035773 seconds and 4 git commands to generate.