diff options
Diffstat (limited to 'drivers/edac/edac_mc_sysfs.c')
| -rw-r--r-- | drivers/edac/edac_mc_sysfs.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c index 87fb396bc550..daa418b61525 100644 --- a/drivers/edac/edac_mc_sysfs.c +++ b/drivers/edac/edac_mc_sysfs.c @@ -17,6 +17,7 @@ #include <linux/edac.h> #include <linux/bug.h> #include <linux/pm_runtime.h> +#include <linux/uaccess.h> #include "edac_core.h" #include "edac_module.h" @@ -783,6 +784,47 @@ static ssize_t mci_max_location_show(struct device *dev, return p - data; } +#ifdef CONFIG_EDAC_DEBUG +static ssize_t edac_fake_inject_write(struct file *file, + const char __user *data, + size_t count, loff_t *ppos) +{ + struct device *dev = file->private_data; + struct mem_ctl_info *mci = to_mci(dev); + static enum hw_event_mc_err_type type; + + type = mci->fake_inject_ue ? HW_EVENT_ERR_UNCORRECTED + : HW_EVENT_ERR_CORRECTED; + + printk(KERN_DEBUG + "Generating a %s fake error to %d.%d.%d to test core handling. NOTE: this won't test the driver-specific decoding logic.\n", + (type == HW_EVENT_ERR_UNCORRECTED) ? "UE" : "CE", + mci->fake_inject_layer[0], + mci->fake_inject_layer[1], + mci->fake_inject_layer[2] + ); + edac_mc_handle_error(type, mci, 0, 0, 0, + mci->fake_inject_layer[0], + mci->fake_inject_layer[1], + mci->fake_inject_layer[2], + "FAKE ERROR", "for EDAC testing only", NULL); + + return count; +} + +static int debugfs_open(struct inode *inode, struct file *file) +{ + file->private_data = inode->i_private; + return 0; +} + +static const struct file_operations debug_fake_inject_fops = { + .open = debugfs_open, + .write = edac_fake_inject_write, + .llseek = generic_file_llseek, +}; +#endif + /* default Control file */ DEVICE_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store); @@ -833,6 +875,45 @@ static struct device_type mci_attr_type = { .release = mci_attr_release, }; +#ifdef CONFIG_EDAC_DEBUG +int edac_create_debug_nodes(struct mem_ctl_info *mci) +{ + struct dentry *d, *parent; + char name[80]; + int i; + + d = debugfs_create_dir(mci->dev.kobj.name, mci->debugfs); + if (!d) + return -ENOMEM; + parent = d; + + for (i = 0; i < mci->n_layers; i++) { + sprintf(name, "fake_inject_%s", + edac_layer_name[mci->layers[i].type]); + d = debugfs_create_u8(name, S_IRUGO | S_IWUSR, parent, + &mci->fake_inject_layer[i]); + if (!d) + goto nomem; + } + + d = debugfs_create_bool("fake_inject_ue", S_IRUGO | S_IWUSR, parent, + &mci->fake_inject_ue); + if (!d) + goto nomem; + + d = debugfs_create_file("fake_inject", S_IWUSR, parent, + &mci->dev, + &debug_fake_inject_fops); + if (!d) + goto nomem; + + return 0; +nomem: + debugfs_remove(mci->debugfs); + return -ENOMEM; +} +#endif + /* * Create a new Memory Controller kobject instance, * mc<id> under the 'mc' directory @@ -911,6 +992,9 @@ int edac_create_sysfs_mci_device(struct mem_ctl_info *mci) goto fail; #endif +#ifdef CONFIG_EDAC_DEBUG + edac_create_debug_nodes(mci); +#endif return 0; fail: @@ -937,6 +1021,9 @@ void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci) debugf0("%s()\n", __func__); +#ifdef CONFIG_EDAC_DEBUG + debugfs_remove(mci->debugfs); +#endif #ifdef CONFIG_EDAC_LEGACY_SYSFS edac_delete_csrow_objects(mci); #endif |