debugfs.c 3.9 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151
  1. // SPDX-License-Identifier: GPL-2.0-only
  2. #include "edac_module.h"
  3. static struct dentry *edac_debugfs;
  4. static ssize_t edac_fake_inject_write(struct file *file,
  5. const char __user *data,
  6. size_t count, loff_t *ppos)
  7. {
  8. struct device *dev = file->private_data;
  9. struct mem_ctl_info *mci = to_mci(dev);
  10. static enum hw_event_mc_err_type type;
  11. u16 errcount = mci->fake_inject_count;
  12. if (!errcount)
  13. errcount = 1;
  14. type = mci->fake_inject_ue ? HW_EVENT_ERR_UNCORRECTED
  15. : HW_EVENT_ERR_CORRECTED;
  16. printk(KERN_DEBUG
  17. "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",
  18. errcount,
  19. (type == HW_EVENT_ERR_UNCORRECTED) ? "UE" : "CE",
  20. errcount > 1 ? "s" : "",
  21. mci->fake_inject_layer[0],
  22. mci->fake_inject_layer[1],
  23. mci->fake_inject_layer[2]
  24. );
  25. edac_mc_handle_error(type, mci, errcount, 0, 0, 0,
  26. mci->fake_inject_layer[0],
  27. mci->fake_inject_layer[1],
  28. mci->fake_inject_layer[2],
  29. "FAKE ERROR", "for EDAC testing only");
  30. return count;
  31. }
  32. static const struct file_operations debug_fake_inject_fops = {
  33. .open = simple_open,
  34. .write = edac_fake_inject_write,
  35. .llseek = generic_file_llseek,
  36. };
  37. void __init edac_debugfs_init(void)
  38. {
  39. edac_debugfs = debugfs_create_dir("edac", NULL);
  40. }
  41. void edac_debugfs_exit(void)
  42. {
  43. debugfs_remove_recursive(edac_debugfs);
  44. }
  45. void edac_create_debugfs_nodes(struct mem_ctl_info *mci)
  46. {
  47. struct dentry *parent;
  48. char name[80];
  49. int i;
  50. parent = debugfs_create_dir(mci->dev.kobj.name, edac_debugfs);
  51. for (i = 0; i < mci->n_layers; i++) {
  52. sprintf(name, "fake_inject_%s",
  53. edac_layer_name[mci->layers[i].type]);
  54. debugfs_create_u8(name, S_IRUGO | S_IWUSR, parent,
  55. &mci->fake_inject_layer[i]);
  56. }
  57. debugfs_create_bool("fake_inject_ue", S_IRUGO | S_IWUSR, parent,
  58. &mci->fake_inject_ue);
  59. debugfs_create_u16("fake_inject_count", S_IRUGO | S_IWUSR, parent,
  60. &mci->fake_inject_count);
  61. debugfs_create_file("fake_inject", S_IWUSR, parent, &mci->dev,
  62. &debug_fake_inject_fops);
  63. mci->debugfs = parent;
  64. }
  65. /* Create a toplevel dir under EDAC's debugfs hierarchy */
  66. struct dentry *edac_debugfs_create_dir(const char *dirname)
  67. {
  68. if (!edac_debugfs)
  69. return NULL;
  70. return debugfs_create_dir(dirname, edac_debugfs);
  71. }
  72. EXPORT_SYMBOL_GPL(edac_debugfs_create_dir);
  73. /* Create a toplevel dir under EDAC's debugfs hierarchy with parent @parent */
  74. struct dentry *
  75. edac_debugfs_create_dir_at(const char *dirname, struct dentry *parent)
  76. {
  77. return debugfs_create_dir(dirname, parent);
  78. }
  79. EXPORT_SYMBOL_GPL(edac_debugfs_create_dir_at);
  80. /*
  81. * Create a file under EDAC's hierarchy or a sub-hierarchy:
  82. *
  83. * @name: file name
  84. * @mode: file permissions
  85. * @parent: parent dentry. If NULL, it becomes the toplevel EDAC dir
  86. * @data: private data of caller
  87. * @fops: file operations of this file
  88. */
  89. struct dentry *
  90. edac_debugfs_create_file(const char *name, umode_t mode, struct dentry *parent,
  91. void *data, const struct file_operations *fops)
  92. {
  93. if (!parent)
  94. parent = edac_debugfs;
  95. return debugfs_create_file(name, mode, parent, data, fops);
  96. }
  97. EXPORT_SYMBOL_GPL(edac_debugfs_create_file);
  98. /* Wrapper for debugfs_create_x8() */
  99. void edac_debugfs_create_x8(const char *name, umode_t mode,
  100. struct dentry *parent, u8 *value)
  101. {
  102. if (!parent)
  103. parent = edac_debugfs;
  104. debugfs_create_x8(name, mode, parent, value);
  105. }
  106. EXPORT_SYMBOL_GPL(edac_debugfs_create_x8);
  107. /* Wrapper for debugfs_create_x16() */
  108. void edac_debugfs_create_x16(const char *name, umode_t mode,
  109. struct dentry *parent, u16 *value)
  110. {
  111. if (!parent)
  112. parent = edac_debugfs;
  113. debugfs_create_x16(name, mode, parent, value);
  114. }
  115. EXPORT_SYMBOL_GPL(edac_debugfs_create_x16);
  116. /* Wrapper for debugfs_create_x32() */
  117. void edac_debugfs_create_x32(const char *name, umode_t mode,
  118. struct dentry *parent, u32 *value)
  119. {
  120. if (!parent)
  121. parent = edac_debugfs;
  122. debugfs_create_x32(name, mode, parent, value);
  123. }
  124. EXPORT_SYMBOL_GPL(edac_debugfs_create_x32);