devres.c 5.1 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Tests for the devres (
  4. *
  5. * Copyright 2019 Google LLC
  6. */
  7. #include <common.h>
  8. #include <errno.h>
  9. #include <dm.h>
  10. #include <log.h>
  11. #include <malloc.h>
  12. #include <dm/device-internal.h>
  13. #include <dm/devres.h>
  14. #include <dm/test.h>
  15. #include <dm/uclass-internal.h>
  16. #include <test/ut.h>
  17. /* Test that devm_kmalloc() allocates memory, free when device is removed */
  18. static int dm_test_devres_alloc(struct unit_test_state *uts)
  19. {
  20. ulong mem_start, mem_dev, mem_kmalloc;
  21. struct udevice *dev;
  22. void *ptr;
  23. mem_start = ut_check_delta(0);
  24. ut_assertok(uclass_first_device_err(UCLASS_TEST, &dev));
  25. mem_dev = ut_check_delta(mem_start);
  26. ut_assert(mem_dev > 0);
  27. /* This should increase allocated memory */
  28. ptr = devm_kmalloc(dev, TEST_DEVRES_SIZE, 0);
  29. ut_assert(ptr != NULL);
  30. mem_kmalloc = ut_check_delta(mem_dev);
  31. ut_assert(mem_kmalloc > 0);
  32. /* Check that ptr is freed */
  33. device_remove(dev, DM_REMOVE_NORMAL);
  34. ut_asserteq(0, ut_check_delta(mem_start));
  35. return 0;
  36. }
  37. DM_TEST(dm_test_devres_alloc, UT_TESTF_SCAN_PDATA);
  38. /* Test devm_kfree() can be used to free memory too */
  39. static int dm_test_devres_free(struct unit_test_state *uts)
  40. {
  41. ulong mem_start, mem_dev, mem_kmalloc;
  42. struct udevice *dev;
  43. void *ptr;
  44. mem_start = ut_check_delta(0);
  45. ut_assertok(uclass_first_device_err(UCLASS_TEST, &dev));
  46. mem_dev = ut_check_delta(mem_start);
  47. ut_assert(mem_dev > 0);
  48. ptr = devm_kmalloc(dev, TEST_DEVRES_SIZE, 0);
  49. ut_assert(ptr != NULL);
  50. mem_kmalloc = ut_check_delta(mem_dev);
  51. ut_assert(mem_kmalloc > 0);
  52. /* Free the ptr and check that memory usage goes down */
  53. devm_kfree(dev, ptr);
  54. ut_assert(ut_check_delta(mem_kmalloc) < 0);
  55. device_remove(dev, DM_REMOVE_NORMAL);
  56. ut_asserteq(0, ut_check_delta(mem_start));
  57. return 0;
  58. }
  59. DM_TEST(dm_test_devres_free, UT_TESTF_SCAN_PDATA);
  60. /* Test that kzalloc() returns memory that is zeroed */
  61. static int dm_test_devres_kzalloc(struct unit_test_state *uts)
  62. {
  63. struct udevice *dev;
  64. u8 *ptr, val;
  65. int i;
  66. ut_assertok(uclass_first_device_err(UCLASS_TEST, &dev));
  67. ptr = devm_kzalloc(dev, TEST_DEVRES_SIZE, 0);
  68. ut_assert(ptr != NULL);
  69. for (val = 0, i = 0; i < TEST_DEVRES_SIZE; i++)
  70. val |= *ptr;
  71. ut_asserteq(0, val);
  72. return 0;
  73. }
  74. DM_TEST(dm_test_devres_kzalloc, UT_TESTF_SCAN_PDATA);
  75. /* Test that devm_kmalloc_array() allocates an array that can be set */
  76. static int dm_test_devres_kmalloc_array(struct unit_test_state *uts)
  77. {
  78. ulong mem_start, mem_dev;
  79. struct udevice *dev;
  80. u8 *ptr;
  81. mem_start = ut_check_delta(0);
  82. ut_assertok(uclass_first_device_err(UCLASS_TEST, &dev));
  83. mem_dev = ut_check_delta(mem_start);
  84. ptr = devm_kmalloc_array(dev, TEST_DEVRES_COUNT, TEST_DEVRES_SIZE, 0);
  85. ut_assert(ptr != NULL);
  86. memset(ptr, '\xff', TEST_DEVRES_TOTAL);
  87. ut_assert(ut_check_delta(mem_dev) > 0);
  88. device_remove(dev, DM_REMOVE_NORMAL);
  89. ut_asserteq(0, ut_check_delta(mem_start));
  90. return 0;
  91. }
  92. DM_TEST(dm_test_devres_kmalloc_array, UT_TESTF_SCAN_PDATA);
  93. /* Test that devm_kcalloc() allocates a zeroed array */
  94. static int dm_test_devres_kcalloc(struct unit_test_state *uts)
  95. {
  96. ulong mem_start, mem_dev;
  97. struct udevice *dev;
  98. u8 *ptr, val;
  99. int i;
  100. mem_start = ut_check_delta(0);
  101. ut_assertok(uclass_first_device_err(UCLASS_TEST, &dev));
  102. mem_dev = ut_check_delta(mem_start);
  103. ut_assert(mem_dev > 0);
  104. /* This should increase allocated memory */
  105. ptr = devm_kcalloc(dev, TEST_DEVRES_SIZE, TEST_DEVRES_COUNT, 0);
  106. ut_assert(ptr != NULL);
  107. ut_assert(ut_check_delta(mem_dev) > 0);
  108. for (val = 0, i = 0; i < TEST_DEVRES_TOTAL; i++)
  109. val |= *ptr;
  110. ut_asserteq(0, val);
  111. /* Check that ptr is freed */
  112. device_remove(dev, DM_REMOVE_NORMAL);
  113. ut_asserteq(0, ut_check_delta(mem_start));
  114. return 0;
  115. }
  116. DM_TEST(dm_test_devres_kcalloc, UT_TESTF_SCAN_PDATA);
  117. /* Test devres releases resources automatically as expected */
  118. static int dm_test_devres_phase(struct unit_test_state *uts)
  119. {
  120. struct devres_stats stats;
  121. struct udevice *dev;
  122. /*
  123. * The device is bound already, so find it and check that it has the
  124. * allocation created in the bind() method.
  125. */
  126. ut_assertok(uclass_find_first_device(UCLASS_TEST_DEVRES, &dev));
  127. ut_assertnonnull(dev);
  128. devres_get_stats(dev, &stats);
  129. ut_asserteq(1, stats.allocs);
  130. ut_asserteq(TEST_DEVRES_SIZE, stats.total_size);
  131. /* Getting platdata should add one allocation */
  132. ut_assertok(device_ofdata_to_platdata(dev));
  133. devres_get_stats(dev, &stats);
  134. ut_asserteq(2, stats.allocs);
  135. ut_asserteq(TEST_DEVRES_SIZE + TEST_DEVRES_SIZE3, stats.total_size);
  136. /* Probing the device should add one allocation */
  137. ut_assertok(uclass_first_device(UCLASS_TEST_DEVRES, &dev));
  138. ut_assert(dev != NULL);
  139. devres_get_stats(dev, &stats);
  140. ut_asserteq(3, stats.allocs);
  141. ut_asserteq(TEST_DEVRES_SIZE + TEST_DEVRES_SIZE2 + TEST_DEVRES_SIZE3,
  142. stats.total_size);
  143. /* Removing the device should drop both those allocations */
  144. device_remove(dev, DM_REMOVE_NORMAL);
  145. devres_get_stats(dev, &stats);
  146. ut_asserteq(1, stats.allocs);
  147. ut_asserteq(TEST_DEVRES_SIZE, stats.total_size);
  148. /* Unbinding removes the other. Note this access a freed pointer */
  149. device_unbind(dev);
  150. devres_get_stats(dev, &stats);
  151. ut_asserteq(0, stats.allocs);
  152. ut_asserteq(0, stats.total_size);
  153. return 0;
  154. }
  155. DM_TEST(dm_test_devres_phase, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);