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-rw-r--r--drivers/base/regmap/regmap-kunit.c1235
1 files changed, 1235 insertions, 0 deletions
diff --git a/drivers/base/regmap/regmap-kunit.c b/drivers/base/regmap/regmap-kunit.c
new file mode 100644
index 0000000000..264d29b3fc
--- /dev/null
+++ b/drivers/base/regmap/regmap-kunit.c
@@ -0,0 +1,1235 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// regmap KUnit tests
+//
+// Copyright 2023 Arm Ltd
+
+#include <kunit/test.h>
+#include "internal.h"
+
+#define BLOCK_TEST_SIZE 12
+
+static const struct regmap_config test_regmap_config = {
+ .max_register = BLOCK_TEST_SIZE,
+ .reg_stride = 1,
+ .val_bits = sizeof(unsigned int) * 8,
+};
+
+struct regcache_types {
+ enum regcache_type type;
+ const char *name;
+};
+
+static void case_to_desc(const struct regcache_types *t, char *desc)
+{
+ strcpy(desc, t->name);
+}
+
+static const struct regcache_types regcache_types_list[] = {
+ { REGCACHE_NONE, "none" },
+ { REGCACHE_FLAT, "flat" },
+ { REGCACHE_RBTREE, "rbtree" },
+ { REGCACHE_MAPLE, "maple" },
+};
+
+KUNIT_ARRAY_PARAM(regcache_types, regcache_types_list, case_to_desc);
+
+static const struct regcache_types real_cache_types_list[] = {
+ { REGCACHE_FLAT, "flat" },
+ { REGCACHE_RBTREE, "rbtree" },
+ { REGCACHE_MAPLE, "maple" },
+};
+
+KUNIT_ARRAY_PARAM(real_cache_types, real_cache_types_list, case_to_desc);
+
+static const struct regcache_types sparse_cache_types_list[] = {
+ { REGCACHE_RBTREE, "rbtree" },
+ { REGCACHE_MAPLE, "maple" },
+};
+
+KUNIT_ARRAY_PARAM(sparse_cache_types, sparse_cache_types_list, case_to_desc);
+
+static struct regmap *gen_regmap(struct regmap_config *config,
+ struct regmap_ram_data **data)
+{
+ unsigned int *buf;
+ struct regmap *ret;
+ size_t size = (config->max_register + 1) * sizeof(unsigned int);
+ int i;
+ struct reg_default *defaults;
+
+ config->disable_locking = config->cache_type == REGCACHE_RBTREE ||
+ config->cache_type == REGCACHE_MAPLE;
+
+ buf = kmalloc(size, GFP_KERNEL);
+ if (!buf)
+ return ERR_PTR(-ENOMEM);
+
+ get_random_bytes(buf, size);
+
+ *data = kzalloc(sizeof(**data), GFP_KERNEL);
+ if (!(*data))
+ return ERR_PTR(-ENOMEM);
+ (*data)->vals = buf;
+
+ if (config->num_reg_defaults) {
+ defaults = kcalloc(config->num_reg_defaults,
+ sizeof(struct reg_default),
+ GFP_KERNEL);
+ if (!defaults)
+ return ERR_PTR(-ENOMEM);
+ config->reg_defaults = defaults;
+
+ for (i = 0; i < config->num_reg_defaults; i++) {
+ defaults[i].reg = i * config->reg_stride;
+ defaults[i].def = buf[i * config->reg_stride];
+ }
+ }
+
+ ret = regmap_init_ram(config, *data);
+ if (IS_ERR(ret)) {
+ kfree(buf);
+ kfree(*data);
+ }
+
+ return ret;
+}
+
+static bool reg_5_false(struct device *context, unsigned int reg)
+{
+ return reg != 5;
+}
+
+static void basic_read_write(struct kunit *test)
+{
+ struct regcache_types *t = (struct regcache_types *)test->param_value;
+ struct regmap *map;
+ struct regmap_config config;
+ struct regmap_ram_data *data;
+ unsigned int val, rval;
+
+ config = test_regmap_config;
+ config.cache_type = t->type;
+
+ map = gen_regmap(&config, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ get_random_bytes(&val, sizeof(val));
+
+ /* If we write a value to a register we can read it back */
+ KUNIT_EXPECT_EQ(test, 0, regmap_write(map, 0, val));
+ KUNIT_EXPECT_EQ(test, 0, regmap_read(map, 0, &rval));
+ KUNIT_EXPECT_EQ(test, val, rval);
+
+ /* If using a cache the cache satisfied the read */
+ KUNIT_EXPECT_EQ(test, t->type == REGCACHE_NONE, data->read[0]);
+
+ regmap_exit(map);
+}
+
+static void bulk_write(struct kunit *test)
+{
+ struct regcache_types *t = (struct regcache_types *)test->param_value;
+ struct regmap *map;
+ struct regmap_config config;
+ struct regmap_ram_data *data;
+ unsigned int val[BLOCK_TEST_SIZE], rval[BLOCK_TEST_SIZE];
+ int i;
+
+ config = test_regmap_config;
+ config.cache_type = t->type;
+
+ map = gen_regmap(&config, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ get_random_bytes(&val, sizeof(val));
+
+ /*
+ * Data written via the bulk API can be read back with single
+ * reads.
+ */
+ KUNIT_EXPECT_EQ(test, 0, regmap_bulk_write(map, 0, val,
+ BLOCK_TEST_SIZE));
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ KUNIT_EXPECT_EQ(test, 0, regmap_read(map, i, &rval[i]));
+
+ KUNIT_EXPECT_MEMEQ(test, val, rval, sizeof(val));
+
+ /* If using a cache the cache satisfied the read */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ KUNIT_EXPECT_EQ(test, t->type == REGCACHE_NONE, data->read[i]);
+
+ regmap_exit(map);
+}
+
+static void bulk_read(struct kunit *test)
+{
+ struct regcache_types *t = (struct regcache_types *)test->param_value;
+ struct regmap *map;
+ struct regmap_config config;
+ struct regmap_ram_data *data;
+ unsigned int val[BLOCK_TEST_SIZE], rval[BLOCK_TEST_SIZE];
+ int i;
+
+ config = test_regmap_config;
+ config.cache_type = t->type;
+
+ map = gen_regmap(&config, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ get_random_bytes(&val, sizeof(val));
+
+ /* Data written as single writes can be read via the bulk API */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ KUNIT_EXPECT_EQ(test, 0, regmap_write(map, i, val[i]));
+ KUNIT_EXPECT_EQ(test, 0, regmap_bulk_read(map, 0, rval,
+ BLOCK_TEST_SIZE));
+ KUNIT_EXPECT_MEMEQ(test, val, rval, sizeof(val));
+
+ /* If using a cache the cache satisfied the read */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ KUNIT_EXPECT_EQ(test, t->type == REGCACHE_NONE, data->read[i]);
+
+ regmap_exit(map);
+}
+
+static void write_readonly(struct kunit *test)
+{
+ struct regcache_types *t = (struct regcache_types *)test->param_value;
+ struct regmap *map;
+ struct regmap_config config;
+ struct regmap_ram_data *data;
+ unsigned int val;
+ int i;
+
+ config = test_regmap_config;
+ config.cache_type = t->type;
+ config.num_reg_defaults = BLOCK_TEST_SIZE;
+ config.writeable_reg = reg_5_false;
+
+ map = gen_regmap(&config, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ get_random_bytes(&val, sizeof(val));
+
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ data->written[i] = false;
+
+ /* Change the value of all registers, readonly should fail */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ KUNIT_EXPECT_EQ(test, i != 5, regmap_write(map, i, val) == 0);
+
+ /* Did that match what we see on the device? */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ KUNIT_EXPECT_EQ(test, i != 5, data->written[i]);
+
+ regmap_exit(map);
+}
+
+static void read_writeonly(struct kunit *test)
+{
+ struct regcache_types *t = (struct regcache_types *)test->param_value;
+ struct regmap *map;
+ struct regmap_config config;
+ struct regmap_ram_data *data;
+ unsigned int val;
+ int i;
+
+ config = test_regmap_config;
+ config.cache_type = t->type;
+ config.readable_reg = reg_5_false;
+
+ map = gen_regmap(&config, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ data->read[i] = false;
+
+ /*
+ * Try to read all the registers, the writeonly one should
+ * fail if we aren't using the flat cache.
+ */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++) {
+ if (t->type != REGCACHE_FLAT) {
+ KUNIT_EXPECT_EQ(test, i != 5,
+ regmap_read(map, i, &val) == 0);
+ } else {
+ KUNIT_EXPECT_EQ(test, 0, regmap_read(map, i, &val));
+ }
+ }
+
+ /* Did we trigger a hardware access? */
+ KUNIT_EXPECT_FALSE(test, data->read[5]);
+
+ regmap_exit(map);
+}
+
+static void reg_defaults(struct kunit *test)
+{
+ struct regcache_types *t = (struct regcache_types *)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.cache_type = t->type;
+ config.num_reg_defaults = BLOCK_TEST_SIZE;
+
+ map = gen_regmap(&config, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ /* Read back the expected default data */
+ KUNIT_EXPECT_EQ(test, 0, regmap_bulk_read(map, 0, rval,
+ BLOCK_TEST_SIZE));
+ KUNIT_EXPECT_MEMEQ(test, data->vals, rval, sizeof(rval));
+
+ /* The data should have been read from cache if there was one */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ KUNIT_EXPECT_EQ(test, t->type == REGCACHE_NONE, data->read[i]);
+}
+
+static void reg_defaults_read_dev(struct kunit *test)
+{
+ struct regcache_types *t = (struct regcache_types *)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.cache_type = t->type;
+ config.num_reg_defaults_raw = BLOCK_TEST_SIZE;
+
+ map = gen_regmap(&config, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ /* We should have read the cache defaults back from the map */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++) {
+ KUNIT_EXPECT_EQ(test, t->type != REGCACHE_NONE, data->read[i]);
+ data->read[i] = false;
+ }
+
+ /* Read back the expected default data */
+ KUNIT_EXPECT_EQ(test, 0, regmap_bulk_read(map, 0, rval,
+ BLOCK_TEST_SIZE));
+ KUNIT_EXPECT_MEMEQ(test, data->vals, rval, sizeof(rval));
+
+ /* The data should have been read from cache if there was one */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ KUNIT_EXPECT_EQ(test, t->type == REGCACHE_NONE, data->read[i]);
+}
+
+static void register_patch(struct kunit *test)
+{
+ struct regcache_types *t = (struct regcache_types *)test->param_value;
+ struct regmap *map;
+ struct regmap_config config;
+ struct regmap_ram_data *data;
+ struct reg_sequence patch[2];
+ unsigned int rval[BLOCK_TEST_SIZE];
+ int i;
+
+ /* We need defaults so readback works */
+ config = test_regmap_config;
+ config.cache_type = t->type;
+ config.num_reg_defaults = BLOCK_TEST_SIZE;
+
+ map = gen_regmap(&config, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ /* Stash the original values */
+ KUNIT_EXPECT_EQ(test, 0, regmap_bulk_read(map, 0, rval,
+ BLOCK_TEST_SIZE));
+
+ /* Patch a couple of values */
+ patch[0].reg = 2;
+ patch[0].def = rval[2] + 1;
+ patch[0].delay_us = 0;
+ patch[1].reg = 5;
+ patch[1].def = rval[5] + 1;
+ patch[1].delay_us = 0;
+ KUNIT_EXPECT_EQ(test, 0, regmap_register_patch(map, patch,
+ ARRAY_SIZE(patch)));
+
+ /* Only the patched registers are written */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++) {
+ switch (i) {
+ case 2:
+ case 5:
+ KUNIT_EXPECT_TRUE(test, data->written[i]);
+ KUNIT_EXPECT_EQ(test, data->vals[i], rval[i] + 1);
+ break;
+ default:
+ KUNIT_EXPECT_FALSE(test, data->written[i]);
+ KUNIT_EXPECT_EQ(test, data->vals[i], rval[i]);
+ break;
+ }
+ }
+
+ regmap_exit(map);
+}
+
+static void stride(struct kunit *test)
+{
+ struct regcache_types *t = (struct regcache_types *)test->param_value;
+ struct regmap *map;
+ struct regmap_config config;
+ struct regmap_ram_data *data;
+ unsigned int rval;
+ int i;
+
+ config = test_regmap_config;
+ config.cache_type = t->type;
+ config.reg_stride = 2;
+ config.num_reg_defaults = BLOCK_TEST_SIZE / 2;
+
+ map = gen_regmap(&config, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ /* Only even registers can be accessed, try both read and write */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++) {
+ data->read[i] = false;
+ data->written[i] = false;
+
+ if (i % 2) {
+ KUNIT_EXPECT_NE(test, 0, regmap_read(map, i, &rval));
+ KUNIT_EXPECT_NE(test, 0, regmap_write(map, i, rval));
+ KUNIT_EXPECT_FALSE(test, data->read[i]);
+ KUNIT_EXPECT_FALSE(test, data->written[i]);
+ } else {
+ KUNIT_EXPECT_EQ(test, 0, regmap_read(map, i, &rval));
+ KUNIT_EXPECT_EQ(test, data->vals[i], rval);
+ KUNIT_EXPECT_EQ(test, t->type == REGCACHE_NONE,
+ data->read[i]);
+
+ KUNIT_EXPECT_EQ(test, 0, regmap_write(map, i, rval));
+ KUNIT_EXPECT_TRUE(test, data->written[i]);
+ }
+ }
+
+ regmap_exit(map);
+}
+
+static struct regmap_range_cfg test_range = {
+ .selector_reg = 1,
+ .selector_mask = 0xff,
+
+ .window_start = 4,
+ .window_len = 10,
+
+ .range_min = 20,
+ .range_max = 40,
+};
+
+static bool test_range_volatile(struct device *dev, unsigned int reg)
+{
+ if (reg >= test_range.window_start &&
+ reg <= test_range.selector_reg + test_range.window_len)
+ return true;
+
+ if (reg >= test_range.range_min && reg <= test_range.range_max)
+ return true;
+
+ return false;
+}
+
+static void basic_ranges(struct kunit *test)
+{
+ struct regcache_types *t = (struct regcache_types *)test->param_value;
+ struct regmap *map;
+ struct regmap_config config;
+ struct regmap_ram_data *data;
+ unsigned int val;
+ int i;
+
+ config = test_regmap_config;
+ config.cache_type = t->type;
+ config.volatile_reg = test_range_volatile;
+ config.ranges = &test_range;
+ config.num_ranges = 1;
+ config.max_register = test_range.range_max;
+
+ map = gen_regmap(&config, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ for (i = test_range.range_min; i < test_range.range_max; i++) {
+ data->read[i] = false;
+ data->written[i] = false;
+ }
+
+ /* Reset the page to a non-zero value to trigger a change */
+ KUNIT_EXPECT_EQ(test, 0, regmap_write(map, test_range.selector_reg,
+ test_range.range_max));
+
+ /* Check we set the page and use the window for writes */
+ data->written[test_range.selector_reg] = false;
+ data->written[test_range.window_start] = false;
+ KUNIT_EXPECT_EQ(test, 0, regmap_write(map, test_range.range_min, 0));
+ KUNIT_EXPECT_TRUE(test, data->written[test_range.selector_reg]);
+ KUNIT_EXPECT_TRUE(test, data->written[test_range.window_start]);
+
+ data->written[test_range.selector_reg] = false;
+ data->written[test_range.window_start] = false;
+ KUNIT_EXPECT_EQ(test, 0, regmap_write(map,
+ test_range.range_min +
+ test_range.window_len,
+ 0));
+ KUNIT_EXPECT_TRUE(test, data->written[test_range.selector_reg]);
+ KUNIT_EXPECT_TRUE(test, data->written[test_range.window_start]);
+
+ /* Same for reads */
+ data->written[test_range.selector_reg] = false;
+ data->read[test_range.window_start] = false;
+ KUNIT_EXPECT_EQ(test, 0, regmap_read(map, test_range.range_min, &val));
+ KUNIT_EXPECT_TRUE(test, data->written[test_range.selector_reg]);
+ KUNIT_EXPECT_TRUE(test, data->read[test_range.window_start]);
+
+ data->written[test_range.selector_reg] = false;
+ data->read[test_range.window_start] = false;
+ KUNIT_EXPECT_EQ(test, 0, regmap_read(map,
+ test_range.range_min +
+ test_range.window_len,
+ &val));
+ KUNIT_EXPECT_TRUE(test, data->written[test_range.selector_reg]);
+ KUNIT_EXPECT_TRUE(test, data->read[test_range.window_start]);
+
+ /* No physical access triggered in the virtual range */
+ for (i = test_range.range_min; i < test_range.range_max; i++) {
+ KUNIT_EXPECT_FALSE(test, data->read[i]);
+ KUNIT_EXPECT_FALSE(test, data->written[i]);
+ }
+
+ regmap_exit(map);
+}
+
+/* Try to stress dynamic creation of cache data structures */
+static void stress_insert(struct kunit *test)
+{
+ struct regcache_types *t = (struct regcache_types *)test->param_value;
+ struct regmap *map;
+ struct regmap_config config;
+ struct regmap_ram_data *data;
+ unsigned int rval, *vals;
+ size_t buf_sz;
+ int i;
+
+ config = test_regmap_config;
+ config.cache_type = t->type;
+ config.max_register = 300;
+
+ map = gen_regmap(&config, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ vals = kunit_kcalloc(test, sizeof(unsigned long), config.max_register,
+ GFP_KERNEL);
+ KUNIT_ASSERT_FALSE(test, vals == NULL);
+ buf_sz = sizeof(unsigned long) * config.max_register;
+
+ get_random_bytes(vals, buf_sz);
+
+ /* Write data into the map/cache in ever decreasing strides */
+ for (i = 0; i < config.max_register; i += 100)
+ KUNIT_EXPECT_EQ(test, 0, regmap_write(map, i, vals[i]));
+ for (i = 0; i < config.max_register; i += 50)
+ KUNIT_EXPECT_EQ(test, 0, regmap_write(map, i, vals[i]));
+ for (i = 0; i < config.max_register; i += 25)
+ KUNIT_EXPECT_EQ(test, 0, regmap_write(map, i, vals[i]));
+ for (i = 0; i < config.max_register; i += 10)
+ KUNIT_EXPECT_EQ(test, 0, regmap_write(map, i, vals[i]));
+ for (i = 0; i < config.max_register; i += 5)
+ KUNIT_EXPECT_EQ(test, 0, regmap_write(map, i, vals[i]));
+ for (i = 0; i < config.max_register; i += 3)
+ KUNIT_EXPECT_EQ(test, 0, regmap_write(map, i, vals[i]));
+ for (i = 0; i < config.max_register; i += 2)
+ KUNIT_EXPECT_EQ(test, 0, regmap_write(map, i, vals[i]));
+ for (i = 0; i < config.max_register; i++)
+ KUNIT_EXPECT_EQ(test, 0, regmap_write(map, i, vals[i]));
+
+ /* Do reads from the cache (if there is one) match? */
+ for (i = 0; i < config.max_register; i ++) {
+ KUNIT_EXPECT_EQ(test, 0, regmap_read(map, i, &rval));
+ KUNIT_EXPECT_EQ(test, rval, vals[i]);
+ KUNIT_EXPECT_EQ(test, t->type == REGCACHE_NONE, data->read[i]);
+ }
+
+ regmap_exit(map);
+}
+
+static void cache_bypass(struct kunit *test)
+{
+ struct regcache_types *t = (struct regcache_types *)test->param_value;
+ struct regmap *map;
+ struct regmap_config config;
+ struct regmap_ram_data *data;
+ unsigned int val, rval;
+
+ config = test_regmap_config;
+ config.cache_type = t->type;
+
+ map = gen_regmap(&config, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ get_random_bytes(&val, sizeof(val));
+
+ /* Ensure the cache has a value in it */
+ KUNIT_EXPECT_EQ(test, 0, regmap_write(map, 0, val));
+
+ /* Bypass then write a different value */
+ regcache_cache_bypass(map, true);
+ KUNIT_EXPECT_EQ(test, 0, regmap_write(map, 0, val + 1));
+
+ /* Read the bypassed value */
+ KUNIT_EXPECT_EQ(test, 0, regmap_read(map, 0, &rval));
+ KUNIT_EXPECT_EQ(test, val + 1, rval);
+ KUNIT_EXPECT_EQ(test, data->vals[0], rval);
+
+ /* Disable bypass, the cache should still return the original value */
+ regcache_cache_bypass(map, false);
+ KUNIT_EXPECT_EQ(test, 0, regmap_read(map, 0, &rval));
+ KUNIT_EXPECT_EQ(test, val, rval);
+
+ regmap_exit(map);
+}
+
+static void cache_sync(struct kunit *test)
+{
+ struct regcache_types *t = (struct regcache_types *)test->param_value;
+ struct regmap *map;
+ struct regmap_config config;
+ struct regmap_ram_data *data;
+ unsigned int val[BLOCK_TEST_SIZE];
+ int i;
+
+ config = test_regmap_config;
+ config.cache_type = t->type;
+
+ map = gen_regmap(&config, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ get_random_bytes(&val, sizeof(val));
+
+ /* Put some data into the cache */
+ KUNIT_EXPECT_EQ(test, 0, regmap_bulk_write(map, 0, val,
+ BLOCK_TEST_SIZE));
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ data->written[i] = false;
+
+ /* Trash the data on the device itself then resync */
+ regcache_mark_dirty(map);
+ memset(data->vals, 0, sizeof(val));
+ KUNIT_EXPECT_EQ(test, 0, regcache_sync(map));
+
+ /* Did we just write the correct data out? */
+ KUNIT_EXPECT_MEMEQ(test, data->vals, val, sizeof(val));
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ KUNIT_EXPECT_EQ(test, true, data->written[i]);
+
+ regmap_exit(map);
+}
+
+static void cache_sync_defaults(struct kunit *test)
+{
+ struct regcache_types *t = (struct regcache_types *)test->param_value;
+ struct regmap *map;
+ struct regmap_config config;
+ struct regmap_ram_data *data;
+ unsigned int val;
+ int i;
+
+ config = test_regmap_config;
+ config.cache_type = t->type;
+ config.num_reg_defaults = BLOCK_TEST_SIZE;
+
+ map = gen_regmap(&config, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ get_random_bytes(&val, sizeof(val));
+
+ /* Change the value of one register */
+ KUNIT_EXPECT_EQ(test, 0, regmap_write(map, 2, val));
+
+ /* Resync */
+ regcache_mark_dirty(map);
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ data->written[i] = false;
+ KUNIT_EXPECT_EQ(test, 0, regcache_sync(map));
+
+ /* Did we just sync the one register we touched? */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ KUNIT_EXPECT_EQ(test, i == 2, data->written[i]);
+
+ regmap_exit(map);
+}
+
+static void cache_sync_readonly(struct kunit *test)
+{
+ struct regcache_types *t = (struct regcache_types *)test->param_value;
+ struct regmap *map;
+ struct regmap_config config;
+ struct regmap_ram_data *data;
+ unsigned int val;
+ int i;
+
+ config = test_regmap_config;
+ config.cache_type = t->type;
+ config.writeable_reg = reg_5_false;
+
+ map = gen_regmap(&config, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ /* Read all registers to fill the cache */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ KUNIT_EXPECT_EQ(test, 0, regmap_read(map, i, &val));
+
+ /* Change the value of all registers, readonly should fail */
+ get_random_bytes(&val, sizeof(val));
+ regcache_cache_only(map, true);
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ KUNIT_EXPECT_EQ(test, i != 5, regmap_write(map, i, val) == 0);
+ regcache_cache_only(map, false);
+
+ /* Resync */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ data->written[i] = false;
+ KUNIT_EXPECT_EQ(test, 0, regcache_sync(map));
+
+ /* Did that match what we see on the device? */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ KUNIT_EXPECT_EQ(test, i != 5, data->written[i]);
+
+ regmap_exit(map);
+}
+
+static void cache_sync_patch(struct kunit *test)
+{
+ struct regcache_types *t = (struct regcache_types *)test->param_value;
+ struct regmap *map;
+ struct regmap_config config;
+ struct regmap_ram_data *data;
+ struct reg_sequence patch[2];
+ unsigned int rval[BLOCK_TEST_SIZE], val;
+ int i;
+
+ /* We need defaults so readback works */
+ config = test_regmap_config;
+ config.cache_type = t->type;
+ config.num_reg_defaults = BLOCK_TEST_SIZE;
+
+ map = gen_regmap(&config, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ /* Stash the original values */
+ KUNIT_EXPECT_EQ(test, 0, regmap_bulk_read(map, 0, rval,
+ BLOCK_TEST_SIZE));
+
+ /* Patch a couple of values */
+ patch[0].reg = 2;
+ patch[0].def = rval[2] + 1;
+ patch[0].delay_us = 0;
+ patch[1].reg = 5;
+ patch[1].def = rval[5] + 1;
+ patch[1].delay_us = 0;
+ KUNIT_EXPECT_EQ(test, 0, regmap_register_patch(map, patch,
+ ARRAY_SIZE(patch)));
+
+ /* Sync the cache */
+ regcache_mark_dirty(map);
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ data->written[i] = false;
+ KUNIT_EXPECT_EQ(test, 0, regcache_sync(map));
+
+ /* The patch should be on the device but not in the cache */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++) {
+ KUNIT_EXPECT_EQ(test, 0, regmap_read(map, i, &val));
+ KUNIT_EXPECT_EQ(test, val, rval[i]);
+
+ switch (i) {
+ case 2:
+ case 5:
+ KUNIT_EXPECT_EQ(test, true, data->written[i]);
+ KUNIT_EXPECT_EQ(test, data->vals[i], rval[i] + 1);
+ break;
+ default:
+ KUNIT_EXPECT_EQ(test, false, data->written[i]);
+ KUNIT_EXPECT_EQ(test, data->vals[i], rval[i]);
+ break;
+ }
+ }
+
+ regmap_exit(map);
+}
+
+static void cache_drop(struct kunit *test)
+{
+ struct regcache_types *t = (struct regcache_types *)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.cache_type = t->type;
+ config.num_reg_defaults = BLOCK_TEST_SIZE;
+
+ map = gen_regmap(&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[i] = false;
+ KUNIT_EXPECT_EQ(test, 0, regmap_bulk_read(map, 0, rval,
+ BLOCK_TEST_SIZE));
+ for (i = 0; i < BLOCK_TEST_SIZE; i++) {
+ KUNIT_EXPECT_FALSE(test, data->read[i]);
+ data->read[i] = false;
+ }
+ KUNIT_EXPECT_MEMEQ(test, data->vals, rval, sizeof(rval));
+
+ /* Drop some registers */
+ KUNIT_EXPECT_EQ(test, 0, regcache_drop_region(map, 3, 5));
+
+ /* Reread and check only the dropped registers hit the device. */
+ KUNIT_EXPECT_EQ(test, 0, regmap_bulk_read(map, 0, rval,
+ BLOCK_TEST_SIZE));
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ KUNIT_EXPECT_EQ(test, data->read[i], i >= 3 && i <= 5);
+ KUNIT_EXPECT_MEMEQ(test, data->vals, rval, sizeof(rval));
+
+ regmap_exit(map);
+}
+
+static void cache_present(struct kunit *test)
+{
+ struct regcache_types *t = (struct regcache_types *)test->param_value;
+ struct regmap *map;
+ struct regmap_config config;
+ struct regmap_ram_data *data;
+ unsigned int val;
+ int i;
+
+ config = test_regmap_config;
+ config.cache_type = t->type;
+
+ map = gen_regmap(&config, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ data->read[i] = false;
+
+ /* No defaults so no registers cached. */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ KUNIT_ASSERT_FALSE(test, regcache_reg_cached(map, i));
+
+ /* We didn't trigger any reads */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ KUNIT_ASSERT_FALSE(test, data->read[i]);
+
+ /* Fill the cache */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ KUNIT_EXPECT_EQ(test, 0, regmap_read(map, i, &val));
+
+ /* Now everything should be cached */
+ for (i = 0; i < BLOCK_TEST_SIZE; i++)
+ KUNIT_ASSERT_TRUE(test, regcache_reg_cached(map, i));
+
+ regmap_exit(map);
+}
+
+struct raw_test_types {
+ const char *name;
+
+ enum regcache_type cache_type;
+ enum regmap_endian val_endian;
+};
+
+static void raw_to_desc(const struct raw_test_types *t, char *desc)
+{
+ strcpy(desc, t->name);
+}
+
+static const struct raw_test_types raw_types_list[] = {
+ { "none-little", REGCACHE_NONE, REGMAP_ENDIAN_LITTLE },
+ { "none-big", REGCACHE_NONE, REGMAP_ENDIAN_BIG },
+ { "flat-little", REGCACHE_FLAT, REGMAP_ENDIAN_LITTLE },
+ { "flat-big", REGCACHE_FLAT, REGMAP_ENDIAN_BIG },
+ { "rbtree-little", REGCACHE_RBTREE, REGMAP_ENDIAN_LITTLE },
+ { "rbtree-big", REGCACHE_RBTREE, REGMAP_ENDIAN_BIG },
+ { "maple-little", REGCACHE_MAPLE, REGMAP_ENDIAN_LITTLE },
+ { "maple-big", REGCACHE_MAPLE, REGMAP_ENDIAN_BIG },
+};
+
+KUNIT_ARRAY_PARAM(raw_test_types, raw_types_list, raw_to_desc);
+
+static const struct raw_test_types raw_cache_types_list[] = {
+ { "flat-little", REGCACHE_FLAT, REGMAP_ENDIAN_LITTLE },
+ { "flat-big", REGCACHE_FLAT, REGMAP_ENDIAN_BIG },
+ { "rbtree-little", REGCACHE_RBTREE, REGMAP_ENDIAN_LITTLE },
+ { "rbtree-big", REGCACHE_RBTREE, REGMAP_ENDIAN_BIG },
+ { "maple-little", REGCACHE_MAPLE, REGMAP_ENDIAN_LITTLE },
+ { "maple-big", REGCACHE_MAPLE, REGMAP_ENDIAN_BIG },
+};
+
+KUNIT_ARRAY_PARAM(raw_test_cache_types, raw_cache_types_list, raw_to_desc);
+
+static const struct regmap_config raw_regmap_config = {
+ .max_register = BLOCK_TEST_SIZE,
+
+ .reg_format_endian = REGMAP_ENDIAN_LITTLE,
+ .reg_bits = 16,
+ .val_bits = 16,
+};
+
+static struct regmap *gen_raw_regmap(struct regmap_config *config,
+ struct raw_test_types *test_type,
+ struct regmap_ram_data **data)
+{
+ u16 *buf;
+ struct regmap *ret;
+ size_t size = (config->max_register + 1) * config->reg_bits / 8;
+ int i;
+ struct reg_default *defaults;
+
+ config->cache_type = test_type->cache_type;
+ config->val_format_endian = test_type->val_endian;
+ config->disable_locking = config->cache_type == REGCACHE_RBTREE ||
+ config->cache_type == REGCACHE_MAPLE;
+
+ buf = kmalloc(size, GFP_KERNEL);
+ if (!buf)
+ return ERR_PTR(-ENOMEM);
+
+ get_random_bytes(buf, size);
+
+ *data = kzalloc(sizeof(**data), GFP_KERNEL);
+ if (!(*data))
+ return ERR_PTR(-ENOMEM);
+ (*data)->vals = (void *)buf;
+
+ config->num_reg_defaults = config->max_register + 1;
+ defaults = kcalloc(config->num_reg_defaults,
+ sizeof(struct reg_default),
+ GFP_KERNEL);
+ if (!defaults)
+ return ERR_PTR(-ENOMEM);
+ config->reg_defaults = defaults;
+
+ for (i = 0; i < config->num_reg_defaults; i++) {
+ defaults[i].reg = i;
+ switch (test_type->val_endian) {
+ case REGMAP_ENDIAN_LITTLE:
+ defaults[i].def = le16_to_cpu(buf[i]);
+ break;
+ case REGMAP_ENDIAN_BIG:
+ defaults[i].def = be16_to_cpu(buf[i]);
+ break;
+ default:
+ return ERR_PTR(-EINVAL);
+ }
+ }
+
+ /*
+ * We use the defaults in the tests but they don't make sense
+ * to the core if there's no cache.
+ */
+ if (config->cache_type == REGCACHE_NONE)
+ config->num_reg_defaults = 0;
+
+ ret = regmap_init_raw_ram(config, *data);
+ if (IS_ERR(ret)) {
+ kfree(buf);
+ kfree(*data);
+ }
+
+ return ret;
+}
+
+static void raw_read_defaults_single(struct kunit *test)
+{
+ struct raw_test_types *t = (struct raw_test_types *)test->param_value;
+ struct regmap *map;
+ struct regmap_config config;
+ struct regmap_ram_data *data;
+ unsigned int rval;
+ int i;
+
+ config = raw_regmap_config;
+
+ map = gen_raw_regmap(&config, t, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ /* Check that we can read the defaults via the API */
+ for (i = 0; i < config.max_register + 1; i++) {
+ KUNIT_EXPECT_EQ(test, 0, regmap_read(map, i, &rval));
+ KUNIT_EXPECT_EQ(test, config.reg_defaults[i].def, rval);
+ }
+
+ regmap_exit(map);
+}
+
+static void raw_read_defaults(struct kunit *test)
+{
+ struct raw_test_types *t = (struct raw_test_types *)test->param_value;
+ struct regmap *map;
+ struct regmap_config config;
+ struct regmap_ram_data *data;
+ u16 *rval;
+ u16 def;
+ size_t val_len;
+ int i;
+
+ config = raw_regmap_config;
+
+ map = gen_raw_regmap(&config, t, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ val_len = sizeof(*rval) * (config.max_register + 1);
+ rval = kmalloc(val_len, GFP_KERNEL);
+ KUNIT_ASSERT_TRUE(test, rval != NULL);
+ if (!rval)
+ return;
+
+ /* Check that we can read the defaults via the API */
+ KUNIT_EXPECT_EQ(test, 0, regmap_raw_read(map, 0, rval, val_len));
+ for (i = 0; i < config.max_register + 1; i++) {
+ def = config.reg_defaults[i].def;
+ if (config.val_format_endian == REGMAP_ENDIAN_BIG) {
+ KUNIT_EXPECT_EQ(test, def, be16_to_cpu(rval[i]));
+ } else {
+ KUNIT_EXPECT_EQ(test, def, le16_to_cpu(rval[i]));
+ }
+ }
+
+ kfree(rval);
+ regmap_exit(map);
+}
+
+static void raw_write_read_single(struct kunit *test)
+{
+ struct raw_test_types *t = (struct raw_test_types *)test->param_value;
+ struct regmap *map;
+ struct regmap_config config;
+ struct regmap_ram_data *data;
+ u16 val;
+ unsigned int rval;
+
+ config = raw_regmap_config;
+
+ map = gen_raw_regmap(&config, t, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ get_random_bytes(&val, sizeof(val));
+
+ /* If we write a value to a register we can read it back */
+ KUNIT_EXPECT_EQ(test, 0, regmap_write(map, 0, val));
+ KUNIT_EXPECT_EQ(test, 0, regmap_read(map, 0, &rval));
+ KUNIT_EXPECT_EQ(test, val, rval);
+
+ regmap_exit(map);
+}
+
+static void raw_write(struct kunit *test)
+{
+ struct raw_test_types *t = (struct raw_test_types *)test->param_value;
+ struct regmap *map;
+ struct regmap_config config;
+ struct regmap_ram_data *data;
+ u16 *hw_buf;
+ u16 val[2];
+ unsigned int rval;
+ int i;
+
+ config = raw_regmap_config;
+
+ map = gen_raw_regmap(&config, t, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ hw_buf = (u16 *)data->vals;
+
+ get_random_bytes(&val, sizeof(val));
+
+ /* Do a raw write */
+ KUNIT_EXPECT_EQ(test, 0, regmap_raw_write(map, 2, val, sizeof(val)));
+
+ /* We should read back the new values, and defaults for the rest */
+ for (i = 0; i < config.max_register + 1; i++) {
+ KUNIT_EXPECT_EQ(test, 0, regmap_read(map, i, &rval));
+
+ switch (i) {
+ case 2:
+ case 3:
+ if (config.val_format_endian == REGMAP_ENDIAN_BIG) {
+ KUNIT_EXPECT_EQ(test, rval,
+ be16_to_cpu(val[i % 2]));
+ } else {
+ KUNIT_EXPECT_EQ(test, rval,
+ le16_to_cpu(val[i % 2]));
+ }
+ break;
+ default:
+ KUNIT_EXPECT_EQ(test, config.reg_defaults[i].def, rval);
+ break;
+ }
+ }
+
+ /* The values should appear in the "hardware" */
+ KUNIT_EXPECT_MEMEQ(test, &hw_buf[2], val, sizeof(val));
+
+ regmap_exit(map);
+}
+
+static void raw_sync(struct kunit *test)
+{
+ struct raw_test_types *t = (struct raw_test_types *)test->param_value;
+ struct regmap *map;
+ struct regmap_config config;
+ struct regmap_ram_data *data;
+ u16 val[2];
+ u16 *hw_buf;
+ unsigned int rval;
+ int i;
+
+ config = raw_regmap_config;
+
+ map = gen_raw_regmap(&config, t, &data);
+ KUNIT_ASSERT_FALSE(test, IS_ERR(map));
+ if (IS_ERR(map))
+ return;
+
+ hw_buf = (u16 *)data->vals;
+
+ get_random_bytes(&val, sizeof(val));
+
+ /* Do a regular write and a raw write in cache only mode */
+ regcache_cache_only(map, true);
+ KUNIT_EXPECT_EQ(test, 0, regmap_raw_write(map, 2, val, sizeof(val)));
+ if (config.val_format_endian == REGMAP_ENDIAN_BIG)
+ KUNIT_EXPECT_EQ(test, 0, regmap_write(map, 6,
+ be16_to_cpu(val[0])));
+ else
+ KUNIT_EXPECT_EQ(test, 0, regmap_write(map, 6,
+ le16_to_cpu(val[0])));
+
+ /* We should read back the new values, and defaults for the rest */
+ for (i = 0; i < config.max_register + 1; i++) {
+ KUNIT_EXPECT_EQ(test, 0, regmap_read(map, i, &rval));
+
+ switch (i) {
+ case 2:
+ case 3:
+ case 6:
+ if (config.val_format_endian == REGMAP_ENDIAN_BIG) {
+ KUNIT_EXPECT_EQ(test, rval,
+ be16_to_cpu(val[i % 2]));
+ } else {
+ KUNIT_EXPECT_EQ(test, rval,
+ le16_to_cpu(val[i % 2]));
+ }
+ break;
+ default:
+ KUNIT_EXPECT_EQ(test, config.reg_defaults[i].def, rval);
+ break;
+ }
+ }
+
+ /* The values should not appear in the "hardware" */
+ KUNIT_EXPECT_MEMNEQ(test, &hw_buf[2], val, sizeof(val));
+ KUNIT_EXPECT_MEMNEQ(test, &hw_buf[6], val, sizeof(u16));
+
+ for (i = 0; i < config.max_register + 1; i++)
+ data->written[i] = false;
+
+ /* Do the sync */
+ regcache_cache_only(map, false);
+ regcache_mark_dirty(map);
+ KUNIT_EXPECT_EQ(test, 0, regcache_sync(map));
+
+ /* The values should now appear in the "hardware" */
+ KUNIT_EXPECT_MEMEQ(test, &hw_buf[2], val, sizeof(val));
+ KUNIT_EXPECT_MEMEQ(test, &hw_buf[6], val, sizeof(u16));
+
+ regmap_exit(map);
+}
+
+static struct kunit_case regmap_test_cases[] = {
+ KUNIT_CASE_PARAM(basic_read_write, regcache_types_gen_params),
+ KUNIT_CASE_PARAM(bulk_write, regcache_types_gen_params),
+ KUNIT_CASE_PARAM(bulk_read, regcache_types_gen_params),
+ KUNIT_CASE_PARAM(write_readonly, regcache_types_gen_params),
+ KUNIT_CASE_PARAM(read_writeonly, regcache_types_gen_params),
+ KUNIT_CASE_PARAM(reg_defaults, regcache_types_gen_params),
+ KUNIT_CASE_PARAM(reg_defaults_read_dev, regcache_types_gen_params),
+ KUNIT_CASE_PARAM(register_patch, regcache_types_gen_params),
+ KUNIT_CASE_PARAM(stride, regcache_types_gen_params),
+ KUNIT_CASE_PARAM(basic_ranges, regcache_types_gen_params),
+ KUNIT_CASE_PARAM(stress_insert, regcache_types_gen_params),
+ KUNIT_CASE_PARAM(cache_bypass, real_cache_types_gen_params),
+ KUNIT_CASE_PARAM(cache_sync, real_cache_types_gen_params),
+ KUNIT_CASE_PARAM(cache_sync_defaults, real_cache_types_gen_params),
+ 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_present, sparse_cache_types_gen_params),
+
+ KUNIT_CASE_PARAM(raw_read_defaults_single, raw_test_types_gen_params),
+ KUNIT_CASE_PARAM(raw_read_defaults, raw_test_types_gen_params),
+ KUNIT_CASE_PARAM(raw_write_read_single, raw_test_types_gen_params),
+ KUNIT_CASE_PARAM(raw_write, raw_test_types_gen_params),
+ KUNIT_CASE_PARAM(raw_sync, raw_test_cache_types_gen_params),
+ {}
+};
+
+static struct kunit_suite regmap_test_suite = {
+ .name = "regmap",
+ .test_cases = regmap_test_cases,
+};
+kunit_test_suite(regmap_test_suite);
+
+MODULE_LICENSE("GPL v2");