regmap: kunit: Add more cache-drop tests

Extend the testing of cache-drop.

- Added cache_drop_all_and_sync_marked_dirty(). If all registers are
  dropped from the cache a regcache_mark_dirty() followed by
  regcache_sync() should not write anything because the cache is empty.

- Added cache_drop_all_and_sync_no_defaults(). This is similar to
  cache_drop_all_and_sync_marked_dirty() except that regcache_mark_dirty()
  is NOT called. All registers were dropped so regcache_sync() should not
  write anything.

- Added cache_drop_all_and_sync_has_defaults(). This is the same as
  cache_drop_all_and_sync_no_defaults() except that the regmap has a
  table of default values.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://msgid.link/r/20240408144600.230848-7-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/base/regmap/regmap-kunit.c b/drivers/base/regmap/regmap-kunit.c
index 873161b58de9a10746950a08b4cd95b92cff5947..3201f5f6406b890b282c602eb6b11432e89dbe39 100644 (file)
--- a/drivers/base/regmap/regmap-kunit.c
+++ b/drivers/base/regmap/regmap-kunit.c
@@ -920,6 +920,138 @@ static void cache_drop(struct kunit *test)
        regmap_exit(map);
 }
 
+static void cache_drop_all_and_sync_marked_dirty(struct kunit *test)
+{
+       const struct regmap_test_param *param = test->param_value;
+       struct regmap *map;
+       struct regmap_config config;
+       struct regmap_ram_data *data;
+       unsigned int rval[BLOCK_TEST_SIZE];
+       int i;
+
+       config = test_regmap_config;
+       config.num_reg_defaults = BLOCK_TEST_SIZE;
+
+       map = gen_regmap(test, &config, &data);
+       KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+       if (IS_ERR(map))
+               return;
+
+       /* Ensure the data is read from the cache */
+       for (i = 0; i < BLOCK_TEST_SIZE; i++)
+               data->read[param->from_reg + i] = false;
+       KUNIT_EXPECT_EQ(test, 0, regmap_bulk_read(map, param->from_reg, rval,
+                                                 BLOCK_TEST_SIZE));
+       KUNIT_EXPECT_MEMEQ(test, &data->vals[param->from_reg], rval, sizeof(rval));
+
+       /* Change all values in cache from defaults */
+       for (i = 0; i < BLOCK_TEST_SIZE; i++)
+               KUNIT_EXPECT_EQ(test, 0, regmap_write(map, param->from_reg + i, rval[i] + 1));
+
+       /* Drop all registers */
+       KUNIT_EXPECT_EQ(test, 0, regcache_drop_region(map, 0, config.max_register));
+
+       /* Mark dirty and cache sync should not write anything. */
+       regcache_mark_dirty(map);
+       for (i = 0; i < BLOCK_TEST_SIZE; i++)
+               data->written[param->from_reg + i] = false;
+
+       KUNIT_EXPECT_EQ(test, 0, regcache_sync(map));
+       for (i = 0; i <= config.max_register; i++)
+               KUNIT_EXPECT_FALSE(test, data->written[i]);
+
+       regmap_exit(map);
+}
+
+static void cache_drop_all_and_sync_no_defaults(struct kunit *test)
+{
+       const struct regmap_test_param *param = test->param_value;
+       struct regmap *map;
+       struct regmap_config config;
+       struct regmap_ram_data *data;
+       unsigned int rval[BLOCK_TEST_SIZE];
+       int i;
+
+       config = test_regmap_config;
+
+       map = gen_regmap(test, &config, &data);
+       KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+       if (IS_ERR(map))
+               return;
+
+       /* Ensure the data is read from the cache */
+       for (i = 0; i < BLOCK_TEST_SIZE; i++)
+               data->read[param->from_reg + i] = false;
+       KUNIT_EXPECT_EQ(test, 0, regmap_bulk_read(map, param->from_reg, rval,
+                                                 BLOCK_TEST_SIZE));
+       KUNIT_EXPECT_MEMEQ(test, &data->vals[param->from_reg], rval, sizeof(rval));
+
+       /* Change all values in cache */
+       for (i = 0; i < BLOCK_TEST_SIZE; i++)
+               KUNIT_EXPECT_EQ(test, 0, regmap_write(map, param->from_reg + i, rval[i] + 1));
+
+       /* Drop all registers */
+       KUNIT_EXPECT_EQ(test, 0, regcache_drop_region(map, 0, config.max_register));
+
+       /*
+        * Sync cache without marking it dirty. All registers were dropped
+        * so the cache should not have any entries to write out.
+        */
+       for (i = 0; i < BLOCK_TEST_SIZE; i++)
+               data->written[param->from_reg + i] = false;
+
+       KUNIT_EXPECT_EQ(test, 0, regcache_sync(map));
+       for (i = 0; i <= config.max_register; i++)
+               KUNIT_EXPECT_FALSE(test, data->written[i]);
+
+       regmap_exit(map);
+}
+
+static void cache_drop_all_and_sync_has_defaults(struct kunit *test)
+{
+       const struct regmap_test_param *param = test->param_value;
+       struct regmap *map;
+       struct regmap_config config;
+       struct regmap_ram_data *data;
+       unsigned int rval[BLOCK_TEST_SIZE];
+       int i;
+
+       config = test_regmap_config;
+       config.num_reg_defaults = BLOCK_TEST_SIZE;
+
+       map = gen_regmap(test, &config, &data);
+       KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+       if (IS_ERR(map))
+               return;
+
+       /* Ensure the data is read from the cache */
+       for (i = 0; i < BLOCK_TEST_SIZE; i++)
+               data->read[param->from_reg + i] = false;
+       KUNIT_EXPECT_EQ(test, 0, regmap_bulk_read(map, param->from_reg, rval,
+                                                 BLOCK_TEST_SIZE));
+       KUNIT_EXPECT_MEMEQ(test, &data->vals[param->from_reg], rval, sizeof(rval));
+
+       /* Change all values in cache from defaults */
+       for (i = 0; i < BLOCK_TEST_SIZE; i++)
+               KUNIT_EXPECT_EQ(test, 0, regmap_write(map, param->from_reg + i, rval[i] + 1));
+
+       /* Drop all registers */
+       KUNIT_EXPECT_EQ(test, 0, regcache_drop_region(map, 0, config.max_register));
+
+       /*
+        * Sync cache without marking it dirty. All registers were dropped
+        * so the cache should not have any entries to write out.
+        */
+       for (i = 0; i < BLOCK_TEST_SIZE; i++)
+               data->written[param->from_reg + i] = false;
+
+       KUNIT_EXPECT_EQ(test, 0, regcache_sync(map));
+       for (i = 0; i <= config.max_register; i++)
+               KUNIT_EXPECT_FALSE(test, data->written[i]);
+
+       regmap_exit(map);
+}
+
 static void cache_present(struct kunit *test)
 {
        const struct regmap_test_param *param = test->param_value;
@@ -1463,6 +1595,9 @@ static struct kunit_case regmap_test_cases[] = {
        KUNIT_CASE_PARAM(cache_sync_readonly, real_cache_types_gen_params),
        KUNIT_CASE_PARAM(cache_sync_patch, real_cache_types_gen_params),
        KUNIT_CASE_PARAM(cache_drop, sparse_cache_types_gen_params),
+       KUNIT_CASE_PARAM(cache_drop_all_and_sync_marked_dirty, sparse_cache_types_gen_params),
+       KUNIT_CASE_PARAM(cache_drop_all_and_sync_no_defaults, sparse_cache_types_gen_params),
+       KUNIT_CASE_PARAM(cache_drop_all_and_sync_has_defaults, sparse_cache_types_gen_params),
        KUNIT_CASE_PARAM(cache_present, sparse_cache_types_gen_params),
        KUNIT_CASE_PARAM(cache_range_window_reg, real_cache_types_only_gen_params),