Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / edac / octeon_edac-pc.c

diff --git a/kernel/drivers/edac/octeon_edac-pc.c b/kernel/drivers/edac/octeon_edac-pc.c
new file mode 100644 (file)
index 0000000..0f83c33
--- /dev/null
+++ b/kernel/drivers/edac/octeon_edac-pc.c
@@ -0,0 +1,143 @@
+/*
+ * 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_MODEL(OCTEON_FAM_2))
+                       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>");