/* * 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>");