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Message-ID: <20240408144600.230848-11-rf@opensource.cirrus.com>
Date: Mon, 8 Apr 2024 15:45:59 +0100
From: Richard Fitzgerald <rf@...nsource.cirrus.com>
To: <broonie@...nel.org>
CC: <linux-kernel@...r.kernel.org>, <patches@...nsource.cirrus.com>,
"Richard
Fitzgerald" <rf@...nsource.cirrus.com>
Subject: [PATCH 10/11] regmap: kunit: Add cache-drop test with multiple cache blocks
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@...nsource.cirrus.com>
---
drivers/base/regmap/regmap-kunit.c | 103 +++++++++++++++++++++++++++++
1 file changed, 103 insertions(+)
diff --git a/drivers/base/regmap/regmap-kunit.c b/drivers/base/regmap/regmap-kunit.c
index 4c29d2db4d20..6e469609c82c 100644
--- a/drivers/base/regmap/regmap-kunit.c
+++ b/drivers/base/regmap/regmap-kunit.c
@@ -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),
--
2.39.2
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