diff options
Diffstat (limited to 'drivers/edac/octeon_edac-pc.c')
| -rw-r--r-- | drivers/edac/octeon_edac-pc.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/drivers/edac/octeon_edac-pc.c b/drivers/edac/octeon_edac-pc.c new file mode 100644 index 000000000..754eced59 --- /dev/null +++ b/drivers/edac/octeon_edac-pc.c @@ -0,0 +1,142 @@ +/* + * 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_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>"); |