| Borislav Petkov | 7ac8bf9 | 2015-09-22 11:56:04 +0200 | [diff] [blame^] | 1 | #include "edac_module.h" |
| 2 | |
| 3 | static struct dentry *edac_debugfs; |
| 4 | |
| 5 | static ssize_t edac_fake_inject_write(struct file *file, |
| 6 | const char __user *data, |
| 7 | size_t count, loff_t *ppos) |
| 8 | { |
| 9 | struct device *dev = file->private_data; |
| 10 | struct mem_ctl_info *mci = to_mci(dev); |
| 11 | static enum hw_event_mc_err_type type; |
| 12 | u16 errcount = mci->fake_inject_count; |
| 13 | |
| 14 | if (!errcount) |
| 15 | errcount = 1; |
| 16 | |
| 17 | type = mci->fake_inject_ue ? HW_EVENT_ERR_UNCORRECTED |
| 18 | : HW_EVENT_ERR_CORRECTED; |
| 19 | |
| 20 | printk(KERN_DEBUG |
| 21 | "Generating %d %s fake error%s to %d.%d.%d to test core handling. NOTE: this won't test the driver-specific decoding logic.\n", |
| 22 | errcount, |
| 23 | (type == HW_EVENT_ERR_UNCORRECTED) ? "UE" : "CE", |
| 24 | errcount > 1 ? "s" : "", |
| 25 | mci->fake_inject_layer[0], |
| 26 | mci->fake_inject_layer[1], |
| 27 | mci->fake_inject_layer[2] |
| 28 | ); |
| 29 | edac_mc_handle_error(type, mci, errcount, 0, 0, 0, |
| 30 | mci->fake_inject_layer[0], |
| 31 | mci->fake_inject_layer[1], |
| 32 | mci->fake_inject_layer[2], |
| 33 | "FAKE ERROR", "for EDAC testing only"); |
| 34 | |
| 35 | return count; |
| 36 | } |
| 37 | |
| 38 | static const struct file_operations debug_fake_inject_fops = { |
| 39 | .open = simple_open, |
| 40 | .write = edac_fake_inject_write, |
| 41 | .llseek = generic_file_llseek, |
| 42 | }; |
| 43 | |
| 44 | int __init edac_debugfs_init(void) |
| 45 | { |
| 46 | edac_debugfs = debugfs_create_dir("edac", NULL); |
| 47 | if (IS_ERR(edac_debugfs)) { |
| 48 | edac_debugfs = NULL; |
| 49 | return -ENOMEM; |
| 50 | } |
| 51 | return 0; |
| 52 | } |
| 53 | |
| 54 | void edac_debugfs_exit(void) |
| 55 | { |
| 56 | debugfs_remove(edac_debugfs); |
| 57 | } |
| 58 | |
| 59 | int edac_create_debugfs_nodes(struct mem_ctl_info *mci) |
| 60 | { |
| 61 | struct dentry *d, *parent; |
| 62 | char name[80]; |
| 63 | int i; |
| 64 | |
| 65 | if (!edac_debugfs) |
| 66 | return -ENODEV; |
| 67 | |
| 68 | d = debugfs_create_dir(mci->dev.kobj.name, edac_debugfs); |
| 69 | if (!d) |
| 70 | return -ENOMEM; |
| 71 | parent = d; |
| 72 | |
| 73 | for (i = 0; i < mci->n_layers; i++) { |
| 74 | sprintf(name, "fake_inject_%s", |
| 75 | edac_layer_name[mci->layers[i].type]); |
| 76 | d = debugfs_create_u8(name, S_IRUGO | S_IWUSR, parent, |
| 77 | &mci->fake_inject_layer[i]); |
| 78 | if (!d) |
| 79 | goto nomem; |
| 80 | } |
| 81 | |
| 82 | d = debugfs_create_bool("fake_inject_ue", S_IRUGO | S_IWUSR, parent, |
| 83 | &mci->fake_inject_ue); |
| 84 | if (!d) |
| 85 | goto nomem; |
| 86 | |
| 87 | d = debugfs_create_u16("fake_inject_count", S_IRUGO | S_IWUSR, parent, |
| 88 | &mci->fake_inject_count); |
| 89 | if (!d) |
| 90 | goto nomem; |
| 91 | |
| 92 | d = debugfs_create_file("fake_inject", S_IWUSR, parent, |
| 93 | &mci->dev, |
| 94 | &debug_fake_inject_fops); |
| 95 | if (!d) |
| 96 | goto nomem; |
| 97 | |
| 98 | mci->debugfs = parent; |
| 99 | return 0; |
| 100 | nomem: |
| 101 | debugfs_remove(mci->debugfs); |
| 102 | return -ENOMEM; |
| 103 | } |