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regmap: kunit: Add cache-drop test with multiple cache blocks

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Add a test case for dropping only some cache blocks and leaving others
unchanged.

The regmap is divided into 8 register ranges, and only 4 of these are
written with values. This creates 4 non-contiguous ranges of registers
with cached values.

One whole range is then dropped, and part of another range. A cache
sync is then performed to check that the correct registers were written,
and the correct values were written to these registers.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://msgid.link/r/20240408144600.230848-11-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Richard Fitzgerald 2024-04-08 15:45:59 +01:00 committed by Mark Brown
parent d6f2fd7adc
commit 468d277e6f
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1 changed files with 103 additions and 0 deletions
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103
drivers/base/regmap/regmap-kunit.c
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@ -1007,6 +1007,108 @@ static void cache_drop(struct kunit *test)
KUNIT_EXPECT_MEMEQ(test, &data->vals[param->from_reg], rval, sizeof(rval));
}
static void cache_drop_with_non_contiguous_ranges(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 val[4][BLOCK_TEST_SIZE];
unsigned int reg;
const int num_ranges = ARRAY_SIZE(val) * 2;
int rangeidx, i;
static_assert(ARRAY_SIZE(val) == 4);
config = test_regmap_config;
config.max_register = param->from_reg + (num_ranges * BLOCK_TEST_SIZE);
map = gen_regmap(test, &config, &data);
KUNIT_ASSERT_FALSE(test, IS_ERR(map));
if (IS_ERR(map))
return;
for (i = 0; i < config.max_register + 1; i++)
data->written[i] = false;
/* Create non-contiguous cache blocks by writing every other range */
get_random_bytes(&val, sizeof(val));
for (rangeidx = 0; rangeidx < num_ranges; rangeidx += 2) {
reg = param->from_reg + (rangeidx * BLOCK_TEST_SIZE);
KUNIT_EXPECT_EQ(test, 0, regmap_bulk_write(map, reg,
&val[rangeidx / 2],
BLOCK_TEST_SIZE));
KUNIT_EXPECT_MEMEQ(test, &data->vals[reg],
&val[rangeidx / 2], sizeof(val[rangeidx / 2]));
}
/* Check that odd ranges weren't written */
for (rangeidx = 1; rangeidx < num_ranges; rangeidx += 2) {
reg = param->from_reg + (rangeidx * BLOCK_TEST_SIZE);
for (i = 0; i < BLOCK_TEST_SIZE; i++)
KUNIT_EXPECT_FALSE(test, data->written[reg + i]);
}
/* Drop range 2 */
reg = param->from_reg + (2 * BLOCK_TEST_SIZE);
KUNIT_EXPECT_EQ(test, 0, regcache_drop_region(map, reg, reg + BLOCK_TEST_SIZE - 1));
/* Drop part of range 4 */
reg = param->from_reg + (4 * BLOCK_TEST_SIZE);
KUNIT_EXPECT_EQ(test, 0, regcache_drop_region(map, reg + 3, reg + 5));
/* Mark dirty and reset mock registers to 0 */
regcache_mark_dirty(map);
for (i = 0; i < config.max_register + 1; i++) {
data->vals[i] = 0;
data->written[i] = false;
}
/* The registers that were dropped from range 4 should now remain at 0 */
val[4 / 2][3] = 0;
val[4 / 2][4] = 0;
val[4 / 2][5] = 0;
/* Sync and check that the expected register ranges were written */
KUNIT_EXPECT_EQ(test, 0, regcache_sync(map));
/* Check that odd ranges weren't written */
for (rangeidx = 1; rangeidx < num_ranges; rangeidx += 2) {
reg = param->from_reg + (rangeidx * BLOCK_TEST_SIZE);
for (i = 0; i < BLOCK_TEST_SIZE; i++)
KUNIT_EXPECT_FALSE(test, data->written[reg + i]);
}
/* Check that even ranges (except 2 and 4) were written */
for (rangeidx = 0; rangeidx < num_ranges; rangeidx += 2) {
if ((rangeidx == 2) || (rangeidx == 4))
continue;
reg = param->from_reg + (rangeidx * BLOCK_TEST_SIZE);
for (i = 0; i < BLOCK_TEST_SIZE; i++)
KUNIT_EXPECT_TRUE(test, data->written[reg + i]);
KUNIT_EXPECT_MEMEQ(test, &data->vals[reg],
&val[rangeidx / 2], sizeof(val[rangeidx / 2]));
}
/* Check that range 2 wasn't written */
reg = param->from_reg + (2 * BLOCK_TEST_SIZE);
for (i = 0; i < BLOCK_TEST_SIZE; i++)
KUNIT_EXPECT_FALSE(test, data->written[reg + i]);
/* Check that range 4 was partially written */
reg = param->from_reg + (4 * BLOCK_TEST_SIZE);
for (i = 0; i < BLOCK_TEST_SIZE; i++)
KUNIT_EXPECT_EQ(test, data->written[reg + i], i < 3 || i > 5);
KUNIT_EXPECT_MEMEQ(test, &data->vals[reg], &val[4 / 2], sizeof(val[4 / 2]));
/* Nothing before param->from_reg should have been written */
for (i = 0; i < param->from_reg; i++)
KUNIT_EXPECT_FALSE(test, data->written[i]);
}
static void cache_drop_all_and_sync_marked_dirty(struct kunit *test)
{
const struct regmap_test_param *param = test->param_value;
@ -1663,6 +1765,7 @@ 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_with_non_contiguous_ranges, 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),