144 lines
3.5 KiB
C
144 lines
3.5 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2012 Cavium, Inc.
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*
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* Copyright (C) 2009 Wind River Systems,
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* written by Ralf Baechle <ralf@linux-mips.org>
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/edac.h>
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#include "edac_core.h"
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#include "edac_module.h"
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#include <asm/octeon/cvmx.h>
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#include <asm/mipsregs.h>
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extern int register_co_cache_error_notifier(struct notifier_block *nb);
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extern int unregister_co_cache_error_notifier(struct notifier_block *nb);
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extern unsigned long long cache_err_dcache[NR_CPUS];
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struct co_cache_error {
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struct notifier_block notifier;
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struct edac_device_ctl_info *ed;
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};
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/**
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* EDAC CPU cache error callback
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*
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* @event: non-zero if unrecoverable.
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*/
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static int co_cache_error_event(struct notifier_block *this,
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unsigned long event, void *ptr)
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{
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struct co_cache_error *p = container_of(this, struct co_cache_error,
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notifier);
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unsigned int core = cvmx_get_core_num();
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unsigned int cpu = smp_processor_id();
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u64 icache_err = read_octeon_c0_icacheerr();
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u64 dcache_err;
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if (event) {
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dcache_err = cache_err_dcache[core];
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cache_err_dcache[core] = 0;
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} else {
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dcache_err = read_octeon_c0_dcacheerr();
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}
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if (icache_err & 1) {
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edac_device_printk(p->ed, KERN_ERR,
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"CacheErr (Icache):%llx, core %d/cpu %d, cp0_errorepc == %lx\n",
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(unsigned long long)icache_err, core, cpu,
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read_c0_errorepc());
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write_octeon_c0_icacheerr(0);
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edac_device_handle_ce(p->ed, cpu, 1, "icache");
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}
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if (dcache_err & 1) {
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edac_device_printk(p->ed, KERN_ERR,
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"CacheErr (Dcache):%llx, core %d/cpu %d, cp0_errorepc == %lx\n",
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(unsigned long long)dcache_err, core, cpu,
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read_c0_errorepc());
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if (event)
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edac_device_handle_ue(p->ed, cpu, 0, "dcache");
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else
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edac_device_handle_ce(p->ed, cpu, 0, "dcache");
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/* Clear the error indication */
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if (OCTEON_IS_MODEL(OCTEON_FAM_2))
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write_octeon_c0_dcacheerr(1);
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else
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write_octeon_c0_dcacheerr(0);
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}
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return NOTIFY_STOP;
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}
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static int co_cache_error_probe(struct platform_device *pdev)
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{
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struct co_cache_error *p = devm_kzalloc(&pdev->dev, sizeof(*p),
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GFP_KERNEL);
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if (!p)
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return -ENOMEM;
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p->notifier.notifier_call = co_cache_error_event;
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platform_set_drvdata(pdev, p);
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p->ed = edac_device_alloc_ctl_info(0, "cpu", num_possible_cpus(),
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"cache", 2, 0, NULL, 0,
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edac_device_alloc_index());
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if (!p->ed)
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goto err;
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p->ed->dev = &pdev->dev;
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p->ed->dev_name = dev_name(&pdev->dev);
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p->ed->mod_name = "octeon-cpu";
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p->ed->ctl_name = "cache";
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if (edac_device_add_device(p->ed)) {
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pr_err("%s: edac_device_add_device() failed\n", __func__);
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goto err1;
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}
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register_co_cache_error_notifier(&p->notifier);
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return 0;
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err1:
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edac_device_free_ctl_info(p->ed);
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err:
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return -ENXIO;
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}
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static int co_cache_error_remove(struct platform_device *pdev)
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{
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struct co_cache_error *p = platform_get_drvdata(pdev);
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unregister_co_cache_error_notifier(&p->notifier);
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edac_device_del_device(&pdev->dev);
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edac_device_free_ctl_info(p->ed);
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return 0;
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}
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static struct platform_driver co_cache_error_driver = {
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.probe = co_cache_error_probe,
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.remove = co_cache_error_remove,
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.driver = {
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.name = "octeon_pc_edac",
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}
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};
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module_platform_driver(co_cache_error_driver);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
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