Commit | Line | Data |
---|---|---|
91abaeaa YS |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * SiFive Platform EDAC Driver | |
4 | * | |
5 | * Copyright (C) 2018-2019 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" | |
13cf4cf0 | 13 | #include <soc/sifive/sifive_l2_cache.h> |
91abaeaa YS |
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 | ||
ad2c302b | 22 | /* |
91abaeaa YS |
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_L2_ERR_TYPE_UE) | |
36 | edac_device_handle_ue(p->dci, 0, 0, msg); | |
37 | else if (event == SIFIVE_L2_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, NULL, 0, | |
56 | edac_device_alloc_index()); | |
6cd18453 WY |
57 | if (!p->dci) |
58 | return -ENOMEM; | |
91abaeaa YS |
59 | |
60 | p->dci->dev = &pdev->dev; | |
61 | p->dci->mod_name = "Sifive ECC Manager"; | |
62 | p->dci->ctl_name = dev_name(&pdev->dev); | |
63 | p->dci->dev_name = dev_name(&pdev->dev); | |
64 | ||
65 | if (edac_device_add_device(p->dci)) { | |
66 | dev_err(p->dci->dev, "failed to register with EDAC core\n"); | |
67 | goto err; | |
68 | } | |
69 | ||
70 | register_sifive_l2_error_notifier(&p->notifier); | |
71 | ||
72 | return 0; | |
73 | ||
74 | err: | |
75 | edac_device_free_ctl_info(p->dci); | |
76 | ||
77 | return -ENXIO; | |
78 | } | |
79 | ||
80 | static int ecc_unregister(struct platform_device *pdev) | |
81 | { | |
82 | struct sifive_edac_priv *p = platform_get_drvdata(pdev); | |
83 | ||
84 | unregister_sifive_l2_error_notifier(&p->notifier); | |
85 | edac_device_del_device(&pdev->dev); | |
86 | edac_device_free_ctl_info(p->dci); | |
87 | ||
88 | return 0; | |
89 | } | |
90 | ||
91 | static struct platform_device *sifive_pdev; | |
92 | ||
93 | static int __init sifive_edac_init(void) | |
94 | { | |
95 | int ret; | |
96 | ||
97 | sifive_pdev = platform_device_register_simple(DRVNAME, 0, NULL, 0); | |
98 | if (IS_ERR(sifive_pdev)) | |
99 | return PTR_ERR(sifive_pdev); | |
100 | ||
101 | ret = ecc_register(sifive_pdev); | |
102 | if (ret) | |
103 | platform_device_unregister(sifive_pdev); | |
104 | ||
105 | return ret; | |
106 | } | |
107 | ||
108 | static void __exit sifive_edac_exit(void) | |
109 | { | |
110 | ecc_unregister(sifive_pdev); | |
111 | platform_device_unregister(sifive_pdev); | |
112 | } | |
113 | ||
114 | module_init(sifive_edac_init); | |
115 | module_exit(sifive_edac_exit); | |
116 | ||
117 | MODULE_AUTHOR("SiFive Inc."); | |
118 | MODULE_DESCRIPTION("SiFive platform EDAC driver"); | |
119 | MODULE_LICENSE("GPL v2"); |