regmap: kunit: Add more cache-sync tests
Extend the testing of cache-sync. - cache_sync() renamed cache_sync_marked_dirty() for clarity of what conditions it is testing. - cache_sync_defaults() renamed cache_sync_defaults_marked_dirty() for clarity. Added code to write the register back to its default value to check that a dirty sync doesn't write out the default value. - Added cache_sync_after_cache_only(). Tests syncing the cache without calling regcache_mark_dirty(). A register written while in cache-only should be written out by regcache_sync(). - Added cache_sync_default_after_cache_only. This is similar to cache_sync_after_cache_only(), but the register is changed to its default value while in cache-only. Because regcache_mark_dirty() was NOT called, regacache_sync() should write out the register. Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com> Link: https://msgid.link/r/20240408144600.230848-8-rf@opensource.cirrus.com Signed-off-by: Mark Brown <broonie@kernel.org>
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@ -706,7 +706,7 @@ static void cache_bypass(struct kunit *test)
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regmap_exit(map);
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}
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static void cache_sync(struct kunit *test)
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static void cache_sync_marked_dirty(struct kunit *test)
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{
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const struct regmap_test_param *param = test->param_value;
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struct regmap *map;
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@ -743,7 +743,58 @@ static void cache_sync(struct kunit *test)
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regmap_exit(map);
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}
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static void cache_sync_defaults(struct kunit *test)
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static void cache_sync_after_cache_only(struct kunit *test)
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{
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const struct regmap_test_param *param = test->param_value;
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struct regmap *map;
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struct regmap_config config;
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struct regmap_ram_data *data;
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unsigned int val[BLOCK_TEST_SIZE];
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unsigned int val_mask;
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int i;
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config = test_regmap_config;
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map = gen_regmap(test, &config, &data);
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KUNIT_ASSERT_FALSE(test, IS_ERR(map));
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if (IS_ERR(map))
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return;
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val_mask = GENMASK(config.val_bits - 1, 0);
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get_random_bytes(&val, sizeof(val));
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/* Put some data into the cache */
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KUNIT_EXPECT_EQ(test, 0, regmap_bulk_write(map, param->from_reg, val,
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BLOCK_TEST_SIZE));
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for (i = 0; i < BLOCK_TEST_SIZE; i++)
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data->written[param->from_reg + i] = false;
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/* Set cache-only and change the values */
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regcache_cache_only(map, true);
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for (i = 0; i < ARRAY_SIZE(val); ++i)
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val[i] = ~val[i] & val_mask;
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KUNIT_EXPECT_EQ(test, 0, regmap_bulk_write(map, param->from_reg, val,
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BLOCK_TEST_SIZE));
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for (i = 0; i < BLOCK_TEST_SIZE; i++)
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KUNIT_EXPECT_FALSE(test, data->written[param->from_reg + i]);
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KUNIT_EXPECT_MEMNEQ(test, &data->vals[param->from_reg], val, sizeof(val));
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/* Exit cache-only and sync the cache without marking hardware registers dirty */
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regcache_cache_only(map, false);
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KUNIT_EXPECT_EQ(test, 0, regcache_sync(map));
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/* Did we just write the correct data out? */
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KUNIT_EXPECT_MEMEQ(test, &data->vals[param->from_reg], val, sizeof(val));
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for (i = 0; i < BLOCK_TEST_SIZE; i++)
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KUNIT_EXPECT_TRUE(test, data->written[param->from_reg + i]);
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regmap_exit(map);
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}
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static void cache_sync_defaults_marked_dirty(struct kunit *test)
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{
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const struct regmap_test_param *param = test->param_value;
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struct regmap *map;
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@ -775,6 +826,71 @@ static void cache_sync_defaults(struct kunit *test)
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for (i = 0; i < BLOCK_TEST_SIZE; i++)
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KUNIT_EXPECT_EQ(test, i == 2, data->written[param->from_reg + i]);
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/* Rewrite registers back to their defaults */
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for (i = 0; i < config.num_reg_defaults; ++i)
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KUNIT_EXPECT_EQ(test, 0, regmap_write(map, config.reg_defaults[i].reg,
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config.reg_defaults[i].def));
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/*
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* Resync after regcache_mark_dirty() should not write out registers
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* that are at default value
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*/
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for (i = 0; i < BLOCK_TEST_SIZE; i++)
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data->written[param->from_reg + i] = false;
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regcache_mark_dirty(map);
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KUNIT_EXPECT_EQ(test, 0, regcache_sync(map));
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for (i = 0; i < BLOCK_TEST_SIZE; i++)
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KUNIT_EXPECT_FALSE(test, data->written[param->from_reg + i]);
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regmap_exit(map);
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}
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static void cache_sync_default_after_cache_only(struct kunit *test)
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{
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const struct regmap_test_param *param = test->param_value;
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struct regmap *map;
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struct regmap_config config;
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struct regmap_ram_data *data;
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unsigned int orig_val;
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int i;
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config = test_regmap_config;
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config.num_reg_defaults = BLOCK_TEST_SIZE;
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map = gen_regmap(test, &config, &data);
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KUNIT_ASSERT_FALSE(test, IS_ERR(map));
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if (IS_ERR(map))
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return;
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KUNIT_EXPECT_EQ(test, 0, regmap_read(map, param->from_reg + 2, &orig_val));
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/* Enter cache-only and change the value of one register */
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regcache_cache_only(map, true);
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KUNIT_EXPECT_EQ(test, 0, regmap_write(map, param->from_reg + 2, orig_val + 1));
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/* Exit cache-only and resync, should write out the changed register */
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regcache_cache_only(map, false);
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for (i = 0; i < BLOCK_TEST_SIZE; i++)
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data->written[param->from_reg + i] = false;
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KUNIT_EXPECT_EQ(test, 0, regcache_sync(map));
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/* Was the register written out? */
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KUNIT_EXPECT_TRUE(test, data->written[param->from_reg + 2]);
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KUNIT_EXPECT_EQ(test, data->vals[param->from_reg + 2], orig_val + 1);
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/* Enter cache-only and write register back to its default value */
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regcache_cache_only(map, true);
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KUNIT_EXPECT_EQ(test, 0, regmap_write(map, param->from_reg + 2, orig_val));
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/* Resync should write out the new value */
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regcache_cache_only(map, false);
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for (i = 0; i < BLOCK_TEST_SIZE; i++)
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data->written[param->from_reg + i] = false;
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KUNIT_EXPECT_EQ(test, 0, regcache_sync(map));
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KUNIT_EXPECT_TRUE(test, data->written[param->from_reg + 2]);
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KUNIT_EXPECT_EQ(test, data->vals[param->from_reg + 2], orig_val);
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regmap_exit(map);
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}
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@ -1590,8 +1706,10 @@ static struct kunit_case regmap_test_cases[] = {
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KUNIT_CASE_PARAM(basic_ranges, regcache_types_gen_params),
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KUNIT_CASE_PARAM(stress_insert, regcache_types_gen_params),
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KUNIT_CASE_PARAM(cache_bypass, real_cache_types_gen_params),
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KUNIT_CASE_PARAM(cache_sync, real_cache_types_gen_params),
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KUNIT_CASE_PARAM(cache_sync_defaults, real_cache_types_gen_params),
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KUNIT_CASE_PARAM(cache_sync_marked_dirty, real_cache_types_gen_params),
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KUNIT_CASE_PARAM(cache_sync_after_cache_only, real_cache_types_gen_params),
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KUNIT_CASE_PARAM(cache_sync_defaults_marked_dirty, real_cache_types_gen_params),
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KUNIT_CASE_PARAM(cache_sync_default_after_cache_only, real_cache_types_gen_params),
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KUNIT_CASE_PARAM(cache_sync_readonly, real_cache_types_gen_params),
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KUNIT_CASE_PARAM(cache_sync_patch, real_cache_types_gen_params),
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KUNIT_CASE_PARAM(cache_drop, sparse_cache_types_gen_params),
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