144 lines
3.5 KiB
C
144 lines
3.5 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2012 Cavium, Inc.
|
|
*
|
|
* Copyright (C) 2009 Wind River Systems,
|
|
* written by Ralf Baechle <ralf@linux-mips.org>
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/io.h>
|
|
#include <linux/edac.h>
|
|
|
|
#include "edac_core.h"
|
|
#include "edac_module.h"
|
|
|
|
#include <asm/octeon/cvmx.h>
|
|
#include <asm/mipsregs.h>
|
|
|
|
extern int register_co_cache_error_notifier(struct notifier_block *nb);
|
|
extern int unregister_co_cache_error_notifier(struct notifier_block *nb);
|
|
|
|
extern unsigned long long cache_err_dcache[NR_CPUS];
|
|
|
|
struct co_cache_error {
|
|
struct notifier_block notifier;
|
|
struct edac_device_ctl_info *ed;
|
|
};
|
|
|
|
/**
|
|
* EDAC CPU cache error callback
|
|
*
|
|
* @event: non-zero if unrecoverable.
|
|
*/
|
|
static int co_cache_error_event(struct notifier_block *this,
|
|
unsigned long event, void *ptr)
|
|
{
|
|
struct co_cache_error *p = container_of(this, struct co_cache_error,
|
|
notifier);
|
|
|
|
unsigned int core = cvmx_get_core_num();
|
|
unsigned int cpu = smp_processor_id();
|
|
u64 icache_err = read_octeon_c0_icacheerr();
|
|
u64 dcache_err;
|
|
|
|
if (event) {
|
|
dcache_err = cache_err_dcache[core];
|
|
cache_err_dcache[core] = 0;
|
|
} else {
|
|
dcache_err = read_octeon_c0_dcacheerr();
|
|
}
|
|
|
|
if (icache_err & 1) {
|
|
edac_device_printk(p->ed, KERN_ERR,
|
|
"CacheErr (Icache):%llx, core %d/cpu %d, cp0_errorepc == %lx\n",
|
|
(unsigned long long)icache_err, core, cpu,
|
|
read_c0_errorepc());
|
|
write_octeon_c0_icacheerr(0);
|
|
edac_device_handle_ce(p->ed, cpu, 1, "icache");
|
|
}
|
|
if (dcache_err & 1) {
|
|
edac_device_printk(p->ed, KERN_ERR,
|
|
"CacheErr (Dcache):%llx, core %d/cpu %d, cp0_errorepc == %lx\n",
|
|
(unsigned long long)dcache_err, core, cpu,
|
|
read_c0_errorepc());
|
|
if (event)
|
|
edac_device_handle_ue(p->ed, cpu, 0, "dcache");
|
|
else
|
|
edac_device_handle_ce(p->ed, cpu, 0, "dcache");
|
|
|
|
/* Clear the error indication */
|
|
if (OCTEON_IS_OCTEON2())
|
|
write_octeon_c0_dcacheerr(1);
|
|
else
|
|
write_octeon_c0_dcacheerr(0);
|
|
}
|
|
|
|
return NOTIFY_STOP;
|
|
}
|
|
|
|
static int co_cache_error_probe(struct platform_device *pdev)
|
|
{
|
|
struct co_cache_error *p = devm_kzalloc(&pdev->dev, sizeof(*p),
|
|
GFP_KERNEL);
|
|
if (!p)
|
|
return -ENOMEM;
|
|
|
|
p->notifier.notifier_call = co_cache_error_event;
|
|
platform_set_drvdata(pdev, p);
|
|
|
|
p->ed = edac_device_alloc_ctl_info(0, "cpu", num_possible_cpus(),
|
|
"cache", 2, 0, NULL, 0,
|
|
edac_device_alloc_index());
|
|
if (!p->ed)
|
|
goto err;
|
|
|
|
p->ed->dev = &pdev->dev;
|
|
|
|
p->ed->dev_name = dev_name(&pdev->dev);
|
|
|
|
p->ed->mod_name = "octeon-cpu";
|
|
p->ed->ctl_name = "cache";
|
|
|
|
if (edac_device_add_device(p->ed)) {
|
|
pr_err("%s: edac_device_add_device() failed\n", __func__);
|
|
goto err1;
|
|
}
|
|
|
|
register_co_cache_error_notifier(&p->notifier);
|
|
|
|
return 0;
|
|
|
|
err1:
|
|
edac_device_free_ctl_info(p->ed);
|
|
err:
|
|
return -ENXIO;
|
|
}
|
|
|
|
static int co_cache_error_remove(struct platform_device *pdev)
|
|
{
|
|
struct co_cache_error *p = platform_get_drvdata(pdev);
|
|
|
|
unregister_co_cache_error_notifier(&p->notifier);
|
|
edac_device_del_device(&pdev->dev);
|
|
edac_device_free_ctl_info(p->ed);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver co_cache_error_driver = {
|
|
.probe = co_cache_error_probe,
|
|
.remove = co_cache_error_remove,
|
|
.driver = {
|
|
.name = "octeon_pc_edac",
|
|
}
|
|
};
|
|
module_platform_driver(co_cache_error_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
|