blob: 0f83c33a7d1fcbb08180d60609aafc92e76a6425 [file] [log] [blame]
Ralf Baechlef65aad42012-10-17 00:39:09 +02001/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
David Daneye1ced092012-11-15 13:58:59 -08006 * Copyright (C) 2012 Cavium, Inc.
7 *
Ralf Baechlef65aad42012-10-17 00:39:09 +02008 * Copyright (C) 2009 Wind River Systems,
9 * written by Ralf Baechle <ralf@linux-mips.org>
10 */
11#include <linux/module.h>
12#include <linux/init.h>
13#include <linux/slab.h>
14#include <linux/interrupt.h>
15#include <linux/io.h>
16#include <linux/edac.h>
17
18#include "edac_core.h"
19#include "edac_module.h"
20
21#include <asm/octeon/cvmx.h>
22#include <asm/mipsregs.h>
23
Ralf Baechlef65aad42012-10-17 00:39:09 +020024extern int register_co_cache_error_notifier(struct notifier_block *nb);
25extern int unregister_co_cache_error_notifier(struct notifier_block *nb);
26
27extern unsigned long long cache_err_dcache[NR_CPUS];
28
David Daneye1ced092012-11-15 13:58:59 -080029struct co_cache_error {
30 struct notifier_block notifier;
31 struct edac_device_ctl_info *ed;
32};
Ralf Baechlef65aad42012-10-17 00:39:09 +020033
David Daneye1ced092012-11-15 13:58:59 -080034/**
Ralf Baechlef65aad42012-10-17 00:39:09 +020035 * EDAC CPU cache error callback
36 *
David Daneye1ced092012-11-15 13:58:59 -080037 * @event: non-zero if unrecoverable.
Ralf Baechlef65aad42012-10-17 00:39:09 +020038 */
Ralf Baechlef65aad42012-10-17 00:39:09 +020039static int co_cache_error_event(struct notifier_block *this,
40 unsigned long event, void *ptr)
41{
David Daneye1ced092012-11-15 13:58:59 -080042 struct co_cache_error *p = container_of(this, struct co_cache_error,
43 notifier);
44
Ralf Baechlef65aad42012-10-17 00:39:09 +020045 unsigned int core = cvmx_get_core_num();
46 unsigned int cpu = smp_processor_id();
David Daneye1ced092012-11-15 13:58:59 -080047 u64 icache_err = read_octeon_c0_icacheerr();
48 u64 dcache_err;
Ralf Baechlef65aad42012-10-17 00:39:09 +020049
David Daneye1ced092012-11-15 13:58:59 -080050 if (event) {
51 dcache_err = cache_err_dcache[core];
Ralf Baechlef65aad42012-10-17 00:39:09 +020052 cache_err_dcache[core] = 0;
David Daneye1ced092012-11-15 13:58:59 -080053 } else {
54 dcache_err = read_octeon_c0_dcacheerr();
Ralf Baechlef65aad42012-10-17 00:39:09 +020055 }
56
David Daneye1ced092012-11-15 13:58:59 -080057 if (icache_err & 1) {
58 edac_device_printk(p->ed, KERN_ERR,
59 "CacheErr (Icache):%llx, core %d/cpu %d, cp0_errorepc == %lx\n",
60 (unsigned long long)icache_err, core, cpu,
61 read_c0_errorepc());
62 write_octeon_c0_icacheerr(0);
63 edac_device_handle_ce(p->ed, cpu, 1, "icache");
64 }
65 if (dcache_err & 1) {
66 edac_device_printk(p->ed, KERN_ERR,
67 "CacheErr (Dcache):%llx, core %d/cpu %d, cp0_errorepc == %lx\n",
68 (unsigned long long)dcache_err, core, cpu,
69 read_c0_errorepc());
70 if (event)
71 edac_device_handle_ue(p->ed, cpu, 0, "dcache");
72 else
73 edac_device_handle_ce(p->ed, cpu, 0, "dcache");
Ralf Baechlef65aad42012-10-17 00:39:09 +020074
David Daneye1ced092012-11-15 13:58:59 -080075 /* Clear the error indication */
76 if (OCTEON_IS_MODEL(OCTEON_FAM_2))
77 write_octeon_c0_dcacheerr(1);
78 else
79 write_octeon_c0_dcacheerr(0);
80 }
81
82 return NOTIFY_STOP;
83}
Ralf Baechlef65aad42012-10-17 00:39:09 +020084
Greg Kroah-Hartman9b3c6e82012-12-21 13:23:51 -080085static int co_cache_error_probe(struct platform_device *pdev)
Ralf Baechlef65aad42012-10-17 00:39:09 +020086{
David Daneye1ced092012-11-15 13:58:59 -080087 struct co_cache_error *p = devm_kzalloc(&pdev->dev, sizeof(*p),
88 GFP_KERNEL);
89 if (!p)
90 return -ENOMEM;
Ralf Baechlef65aad42012-10-17 00:39:09 +020091
David Daneye1ced092012-11-15 13:58:59 -080092 p->notifier.notifier_call = co_cache_error_event;
93 platform_set_drvdata(pdev, p);
Ralf Baechlef65aad42012-10-17 00:39:09 +020094
David Daneye1ced092012-11-15 13:58:59 -080095 p->ed = edac_device_alloc_ctl_info(0, "cpu", num_possible_cpus(),
96 "cache", 2, 0, NULL, 0,
97 edac_device_alloc_index());
98 if (!p->ed)
Ralf Baechlef65aad42012-10-17 00:39:09 +020099 goto err;
David Daneye1ced092012-11-15 13:58:59 -0800100
101 p->ed->dev = &pdev->dev;
102
103 p->ed->dev_name = dev_name(&pdev->dev);
104
105 p->ed->mod_name = "octeon-cpu";
106 p->ed->ctl_name = "cache";
107
108 if (edac_device_add_device(p->ed)) {
109 pr_err("%s: edac_device_add_device() failed\n", __func__);
110 goto err1;
Ralf Baechlef65aad42012-10-17 00:39:09 +0200111 }
112
David Daneye1ced092012-11-15 13:58:59 -0800113 register_co_cache_error_notifier(&p->notifier);
Ralf Baechlef65aad42012-10-17 00:39:09 +0200114
115 return 0;
116
David Daneye1ced092012-11-15 13:58:59 -0800117err1:
118 edac_device_free_ctl_info(p->ed);
Ralf Baechlef65aad42012-10-17 00:39:09 +0200119err:
David Daneye1ced092012-11-15 13:58:59 -0800120 return -ENXIO;
Ralf Baechlef65aad42012-10-17 00:39:09 +0200121}
122
123static int co_cache_error_remove(struct platform_device *pdev)
124{
David Daneye1ced092012-11-15 13:58:59 -0800125 struct co_cache_error *p = platform_get_drvdata(pdev);
Ralf Baechlef65aad42012-10-17 00:39:09 +0200126
David Daneye1ced092012-11-15 13:58:59 -0800127 unregister_co_cache_error_notifier(&p->notifier);
Ralf Baechlef65aad42012-10-17 00:39:09 +0200128 edac_device_del_device(&pdev->dev);
David Daneye1ced092012-11-15 13:58:59 -0800129 edac_device_free_ctl_info(p->ed);
Ralf Baechlef65aad42012-10-17 00:39:09 +0200130 return 0;
131}
132
133static struct platform_driver co_cache_error_driver = {
134 .probe = co_cache_error_probe,
135 .remove = co_cache_error_remove,
136 .driver = {
David Daneye1ced092012-11-15 13:58:59 -0800137 .name = "octeon_pc_edac",
Ralf Baechlef65aad42012-10-17 00:39:09 +0200138 }
139};
David Daneye1ced092012-11-15 13:58:59 -0800140module_platform_driver(co_cache_error_driver);
Ralf Baechlef65aad42012-10-17 00:39:09 +0200141
142MODULE_LICENSE("GPL");
143MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");