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regmap: Provide basic KUnit coverage for the raw register I/O
Simple tests that cover basic raw I/O, plus basic coverage of cache sync since the caches generate bulk I/O with raw register maps. This could be more comprehensive but it is good for testing generic code. Signed-off-by: Mark Brown <broonie@kernel.org> Link: https://lore.kernel.org/r/20230610-regcache-raw-kunit-v1-2-583112cd28ac@kernel.org Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Mark Brown
parent
65dd2f6718
commit
155a6bd637
@ -712,6 +712,327 @@ static void cache_drop(struct kunit *test)
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regmap_exit(map);
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}
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struct raw_test_types {
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const char *name;
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enum regcache_type cache_type;
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enum regmap_endian val_endian;
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};
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static void raw_to_desc(const struct raw_test_types *t, char *desc)
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{
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strcpy(desc, t->name);
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}
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static const struct raw_test_types raw_types_list[] = {
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{ "none-little", REGCACHE_NONE, REGMAP_ENDIAN_LITTLE },
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{ "none-big", REGCACHE_NONE, REGMAP_ENDIAN_BIG },
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{ "flat-little", REGCACHE_FLAT, REGMAP_ENDIAN_LITTLE },
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{ "flat-big", REGCACHE_FLAT, REGMAP_ENDIAN_BIG },
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{ "rbtree-little", REGCACHE_RBTREE, REGMAP_ENDIAN_LITTLE },
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{ "rbtree-big", REGCACHE_RBTREE, REGMAP_ENDIAN_BIG },
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{ "maple-little", REGCACHE_MAPLE, REGMAP_ENDIAN_LITTLE },
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{ "maple-big", REGCACHE_MAPLE, REGMAP_ENDIAN_BIG },
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};
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KUNIT_ARRAY_PARAM(raw_test_types, raw_types_list, raw_to_desc);
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static const struct raw_test_types raw_cache_types_list[] = {
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{ "flat-little", REGCACHE_FLAT, REGMAP_ENDIAN_LITTLE },
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{ "flat-big", REGCACHE_FLAT, REGMAP_ENDIAN_BIG },
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{ "rbtree-little", REGCACHE_RBTREE, REGMAP_ENDIAN_LITTLE },
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{ "rbtree-big", REGCACHE_RBTREE, REGMAP_ENDIAN_BIG },
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{ "maple-little", REGCACHE_MAPLE, REGMAP_ENDIAN_LITTLE },
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{ "maple-big", REGCACHE_MAPLE, REGMAP_ENDIAN_BIG },
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};
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KUNIT_ARRAY_PARAM(raw_test_cache_types, raw_cache_types_list, raw_to_desc);
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static const struct regmap_config raw_regmap_config = {
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.max_register = BLOCK_TEST_SIZE,
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.reg_format_endian = REGMAP_ENDIAN_LITTLE,
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.reg_bits = 16,
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.val_bits = 16,
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};
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static struct regmap *gen_raw_regmap(struct regmap_config *config,
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struct raw_test_types *test_type,
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struct regmap_ram_data **data)
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{
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u16 *buf;
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struct regmap *ret;
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size_t size = (config->max_register + 1) * config->reg_bits / 8;
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int i;
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struct reg_default *defaults;
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config->cache_type = test_type->cache_type;
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config->val_format_endian = test_type->val_endian;
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buf = kmalloc(size, GFP_KERNEL);
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if (!buf)
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return ERR_PTR(-ENOMEM);
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get_random_bytes(buf, size);
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*data = kzalloc(sizeof(**data), GFP_KERNEL);
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if (!(*data))
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return ERR_PTR(-ENOMEM);
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(*data)->vals = (void *)buf;
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config->num_reg_defaults = config->max_register + 1;
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defaults = kcalloc(config->num_reg_defaults,
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sizeof(struct reg_default),
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GFP_KERNEL);
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if (!defaults)
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return ERR_PTR(-ENOMEM);
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config->reg_defaults = defaults;
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for (i = 0; i < config->num_reg_defaults; i++) {
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defaults[i].reg = i;
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switch (test_type->val_endian) {
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case REGMAP_ENDIAN_LITTLE:
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defaults[i].def = le16_to_cpu(buf[i]);
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break;
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case REGMAP_ENDIAN_BIG:
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defaults[i].def = be16_to_cpu(buf[i]);
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break;
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default:
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return ERR_PTR(-EINVAL);
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}
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}
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/*
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* We use the defaults in the tests but they don't make sense
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* to the core if there's no cache.
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*/
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if (config->cache_type == REGCACHE_NONE)
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config->num_reg_defaults = 0;
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ret = regmap_init_raw_ram(config, *data);
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if (IS_ERR(ret)) {
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kfree(buf);
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kfree(*data);
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}
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return ret;
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}
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static void raw_read_defaults_single(struct kunit *test)
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{
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struct raw_test_types *t = (struct raw_test_types *)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 rval;
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int i;
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config = raw_regmap_config;
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map = gen_raw_regmap(&config, t, &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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/* Check that we can read the defaults via the API */
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for (i = 0; i < config.max_register + 1; i++) {
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KUNIT_EXPECT_EQ(test, 0, regmap_read(map, i, &rval));
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KUNIT_EXPECT_EQ(test, config.reg_defaults[i].def, rval);
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}
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regmap_exit(map);
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}
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static void raw_read_defaults(struct kunit *test)
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{
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struct raw_test_types *t = (struct raw_test_types *)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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u16 *rval;
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u16 def;
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size_t val_len;
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int i;
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config = raw_regmap_config;
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map = gen_raw_regmap(&config, t, &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_len = sizeof(*rval) * (config.max_register + 1);
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rval = kmalloc(val_len, GFP_KERNEL);
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KUNIT_ASSERT_TRUE(test, rval != NULL);
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if (!rval)
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return;
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/* Check that we can read the defaults via the API */
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KUNIT_EXPECT_EQ(test, 0, regmap_raw_read(map, 0, rval, val_len));
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for (i = 0; i < config.max_register + 1; i++) {
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def = config.reg_defaults[i].def;
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if (config.val_format_endian == REGMAP_ENDIAN_BIG) {
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KUNIT_EXPECT_EQ(test, def, be16_to_cpu(rval[i]));
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} else {
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KUNIT_EXPECT_EQ(test, def, le16_to_cpu(rval[i]));
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}
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}
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kfree(rval);
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regmap_exit(map);
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}
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static void raw_write_read_single(struct kunit *test)
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{
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struct raw_test_types *t = (struct raw_test_types *)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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u16 val;
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unsigned int rval;
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config = raw_regmap_config;
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map = gen_raw_regmap(&config, t, &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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get_random_bytes(&val, sizeof(val));
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/* If we write a value to a register we can read it back */
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KUNIT_EXPECT_EQ(test, 0, regmap_write(map, 0, val));
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KUNIT_EXPECT_EQ(test, 0, regmap_read(map, 0, &rval));
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KUNIT_EXPECT_EQ(test, val, rval);
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regmap_exit(map);
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}
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static void raw_write(struct kunit *test)
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{
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struct raw_test_types *t = (struct raw_test_types *)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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u16 *hw_buf;
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u16 val[2];
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unsigned int rval;
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int i;
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config = raw_regmap_config;
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map = gen_raw_regmap(&config, t, &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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hw_buf = (u16 *)data->vals;
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get_random_bytes(&val, sizeof(val));
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/* Do a raw write */
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KUNIT_EXPECT_EQ(test, 0, regmap_raw_write(map, 2, val, sizeof(val)));
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/* We should read back the new values, and defaults for the rest */
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for (i = 0; i < config.max_register + 1; i++) {
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KUNIT_EXPECT_EQ(test, 0, regmap_read(map, i, &rval));
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switch (i) {
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case 2:
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case 3:
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if (config.val_format_endian == REGMAP_ENDIAN_BIG) {
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KUNIT_EXPECT_EQ(test, rval,
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be16_to_cpu(val[i % 2]));
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} else {
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KUNIT_EXPECT_EQ(test, rval,
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le16_to_cpu(val[i % 2]));
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}
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break;
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default:
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KUNIT_EXPECT_EQ(test, config.reg_defaults[i].def, rval);
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break;
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}
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}
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/* The values should appear in the "hardware" */
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KUNIT_EXPECT_MEMEQ(test, &hw_buf[2], val, sizeof(val));
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regmap_exit(map);
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}
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static void raw_sync(struct kunit *test)
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{
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struct raw_test_types *t = (struct raw_test_types *)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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u16 val[2];
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u16 *hw_buf;
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unsigned int rval;
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int i;
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config = raw_regmap_config;
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map = gen_raw_regmap(&config, t, &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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hw_buf = (u16 *)data->vals;
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get_random_bytes(&val, sizeof(val));
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/* Do a regular write and a raw write in cache only mode */
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regcache_cache_only(map, true);
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KUNIT_EXPECT_EQ(test, 0, regmap_raw_write(map, 2, val, sizeof(val)));
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if (config.val_format_endian == REGMAP_ENDIAN_BIG)
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KUNIT_EXPECT_EQ(test, 0, regmap_write(map, 6,
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be16_to_cpu(val[0])));
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else
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KUNIT_EXPECT_EQ(test, 0, regmap_write(map, 6,
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le16_to_cpu(val[0])));
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/* We should read back the new values, and defaults for the rest */
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for (i = 0; i < config.max_register + 1; i++) {
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KUNIT_EXPECT_EQ(test, 0, regmap_read(map, i, &rval));
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switch (i) {
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case 2:
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case 3:
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case 6:
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if (config.val_format_endian == REGMAP_ENDIAN_BIG) {
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KUNIT_EXPECT_EQ(test, rval,
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be16_to_cpu(val[i % 2]));
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} else {
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KUNIT_EXPECT_EQ(test, rval,
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le16_to_cpu(val[i % 2]));
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}
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break;
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default:
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KUNIT_EXPECT_EQ(test, config.reg_defaults[i].def, rval);
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break;
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}
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}
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/* The values should not appear in the "hardware" */
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KUNIT_EXPECT_MEMNEQ(test, &hw_buf[2], val, sizeof(val));
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KUNIT_EXPECT_MEMNEQ(test, &hw_buf[6], val, sizeof(u16));
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for (i = 0; i < config.max_register + 1; i++)
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data->written[i] = false;
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/* Do the sync */
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regcache_cache_only(map, 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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/* The values should now appear in the "hardware" */
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KUNIT_EXPECT_MEMEQ(test, &hw_buf[2], val, sizeof(val));
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KUNIT_EXPECT_MEMEQ(test, &hw_buf[6], val, sizeof(u16));
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regmap_exit(map);
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}
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static struct kunit_case regmap_test_cases[] = {
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KUNIT_CASE_PARAM(basic_read_write, regcache_types_gen_params),
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KUNIT_CASE_PARAM(bulk_write, regcache_types_gen_params),
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@ -727,6 +1048,12 @@ static struct kunit_case regmap_test_cases[] = {
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KUNIT_CASE_PARAM(cache_sync_defaults, 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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KUNIT_CASE_PARAM(raw_read_defaults_single, raw_test_types_gen_params),
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KUNIT_CASE_PARAM(raw_read_defaults, raw_test_types_gen_params),
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KUNIT_CASE_PARAM(raw_write_read_single, raw_test_types_gen_params),
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KUNIT_CASE_PARAM(raw_write, raw_test_types_gen_params),
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KUNIT_CASE_PARAM(raw_sync, raw_test_cache_types_gen_params),
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{}
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};
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