cc_debugfs.c 2.7 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /* Copyright (C) 2012-2019 ARM Limited or its affiliates. */
  3. #include <linux/kernel.h>
  4. #include <linux/debugfs.h>
  5. #include <linux/stringify.h>
  6. #include "cc_driver.h"
  7. #include "cc_crypto_ctx.h"
  8. #include "cc_debugfs.h"
  9. #define CC_DEBUG_REG(_X) { \
  10. .name = __stringify(_X),\
  11. .offset = CC_REG(_X) \
  12. }
  13. /*
  14. * This is a global var for the dentry of the
  15. * debugfs ccree/ dir. It is not tied down to
  16. * a specific instance of ccree, hence it is
  17. * global.
  18. */
  19. static struct dentry *cc_debugfs_dir;
  20. static struct debugfs_reg32 ver_sig_regs[] = {
  21. { .name = "SIGNATURE" }, /* Must be 0th */
  22. { .name = "VERSION" }, /* Must be 1st */
  23. };
  24. static const struct debugfs_reg32 pid_cid_regs[] = {
  25. CC_DEBUG_REG(PERIPHERAL_ID_0),
  26. CC_DEBUG_REG(PERIPHERAL_ID_1),
  27. CC_DEBUG_REG(PERIPHERAL_ID_2),
  28. CC_DEBUG_REG(PERIPHERAL_ID_3),
  29. CC_DEBUG_REG(PERIPHERAL_ID_4),
  30. CC_DEBUG_REG(COMPONENT_ID_0),
  31. CC_DEBUG_REG(COMPONENT_ID_1),
  32. CC_DEBUG_REG(COMPONENT_ID_2),
  33. CC_DEBUG_REG(COMPONENT_ID_3),
  34. };
  35. static const struct debugfs_reg32 debug_regs[] = {
  36. CC_DEBUG_REG(HOST_IRR),
  37. CC_DEBUG_REG(HOST_POWER_DOWN_EN),
  38. CC_DEBUG_REG(AXIM_MON_ERR),
  39. CC_DEBUG_REG(DSCRPTR_QUEUE_CONTENT),
  40. CC_DEBUG_REG(HOST_IMR),
  41. CC_DEBUG_REG(AXIM_CFG),
  42. CC_DEBUG_REG(AXIM_CACHE_PARAMS),
  43. CC_DEBUG_REG(GPR_HOST),
  44. CC_DEBUG_REG(AXIM_MON_COMP),
  45. };
  46. void __init cc_debugfs_global_init(void)
  47. {
  48. cc_debugfs_dir = debugfs_create_dir("ccree", NULL);
  49. }
  50. void __exit cc_debugfs_global_fini(void)
  51. {
  52. debugfs_remove(cc_debugfs_dir);
  53. }
  54. int cc_debugfs_init(struct cc_drvdata *drvdata)
  55. {
  56. struct device *dev = drvdata_to_dev(drvdata);
  57. struct debugfs_regset32 *regset, *verset;
  58. regset = devm_kzalloc(dev, sizeof(*regset), GFP_KERNEL);
  59. if (!regset)
  60. return -ENOMEM;
  61. regset->regs = debug_regs;
  62. regset->nregs = ARRAY_SIZE(debug_regs);
  63. regset->base = drvdata->cc_base;
  64. regset->dev = dev;
  65. drvdata->dir = debugfs_create_dir(drvdata->plat_dev->name,
  66. cc_debugfs_dir);
  67. debugfs_create_regset32("regs", 0400, drvdata->dir, regset);
  68. debugfs_create_bool("coherent", 0400, drvdata->dir, &drvdata->coherent);
  69. verset = devm_kzalloc(dev, sizeof(*verset), GFP_KERNEL);
  70. /* Failing here is not important enough to fail the module load */
  71. if (!verset)
  72. return 0;
  73. if (drvdata->hw_rev <= CC_HW_REV_712) {
  74. ver_sig_regs[0].offset = drvdata->sig_offset;
  75. ver_sig_regs[1].offset = drvdata->ver_offset;
  76. verset->regs = ver_sig_regs;
  77. verset->nregs = ARRAY_SIZE(ver_sig_regs);
  78. } else {
  79. verset->regs = pid_cid_regs;
  80. verset->nregs = ARRAY_SIZE(pid_cid_regs);
  81. }
  82. verset->base = drvdata->cc_base;
  83. verset->dev = dev;
  84. debugfs_create_regset32("version", 0400, drvdata->dir, verset);
  85. return 0;
  86. }
  87. void cc_debugfs_fini(struct cc_drvdata *drvdata)
  88. {
  89. debugfs_remove_recursive(drvdata->dir);
  90. }