[PATCH 02/11] platform/chrome: cros_ec_proto: add Kunit tests for cros_ec_cmd_xfer()

Tzung-Bi Shih
2022-06-15T05:13:37Z

cros_ec_cmd_xfer() transfers the given command and data if any. It
performs some sanity checks and calls cros_ec_send_command().

Add Kunit tests for cros_ec_cmd_xfer().

Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
---
drivers/platform/chrome/cros_ec_proto_test.c | 149 +++++++++++++++++++
1 file changed, 149 insertions(+)

diff --git a/drivers/platform/chrome/cros_ec_proto_test.c b/drivers/platform/chrome/cros_ec_proto_test.c
index 1e2a1522c288..33721607a5b9 100644
--- a/drivers/platform/chrome/cros_ec_proto_test.c
+++ b/drivers/platform/chrome/cros_ec_proto_test.c
@@ -1535,6 +1535,151 @@ static void cros_ec_proto_test_query_all_default_wake_mask_return0(struct kunit
}
}

+static void cros_ec_proto_test_cmd_xfer_normal(struct kunit *test)
+{
+ struct cros_ec_proto_test_priv *priv = test->priv;
+ struct cros_ec_device *ec_dev = &priv->ec_dev;
+ struct ec_xfer_mock *mock;
+ int ret;
+ struct {
+ struct cros_ec_command msg;
+ u8 data[0x100];
+ } __packed buf;
+
+ ec_dev->max_request = 0xff;
+ ec_dev->max_response = 0xee;
+ ec_dev->max_passthru = 0xdd;
+
+ buf.msg.version = 0;
+ buf.msg.command = EC_CMD_HELLO;
+ buf.msg.insize = 4;
+ buf.msg.outsize = 2;
+ buf.data[0] = 0x55;
+ buf.data[1] = 0xaa;
+
+ {
+ u8 *data;
+
+ mock = cros_kunit_ec_xfer_mock_add(test, 4);
+ KUNIT_ASSERT_PTR_NE(test, mock, NULL);
+
+ data = (u8 *)mock->o_data;
+ data[0] = 0xaa;
+ data[1] = 0x55;
+ data[2] = 0xcc;
+ data[3] = 0x33;
+ }
+
+ ret = cros_ec_cmd_xfer(ec_dev, &buf.msg);
+ KUNIT_EXPECT_EQ(test, ret, 4);
+
+ {
+ u8 *data;
+
+ mock = cros_kunit_ec_xfer_mock_next();
+ KUNIT_EXPECT_PTR_NE(test, mock, NULL);
+
+ KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
+ KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_HELLO);
+ KUNIT_EXPECT_EQ(test, mock->msg.insize, 4);
+ KUNIT_EXPECT_EQ(test, mock->msg.outsize, 2);
+
+ data = (u8 *)mock->i_data;
+ KUNIT_EXPECT_EQ(test, data[0], 0x55);
+ KUNIT_EXPECT_EQ(test, data[1], 0xaa);
+
+ KUNIT_EXPECT_EQ(test, buf.data[0], 0xaa);
+ KUNIT_EXPECT_EQ(test, buf.data[1], 0x55);
+ KUNIT_EXPECT_EQ(test, buf.data[2], 0xcc);
+ KUNIT_EXPECT_EQ(test, buf.data[3], 0x33);
+ }
+}
+
+static void cros_ec_proto_test_cmd_xfer_excess_msg_insize(struct kunit *test)
+{
+ struct cros_ec_proto_test_priv *priv = test->priv;
+ struct cros_ec_device *ec_dev = &priv->ec_dev;
+ struct ec_xfer_mock *mock;
+ int ret;
+ struct {
+ struct cros_ec_command msg;
+ u8 data[0x100];
+ } __packed buf;
+
+ ec_dev->max_request = 0xff;
+ ec_dev->max_response = 0xee;
+ ec_dev->max_passthru = 0xdd;
+
+ buf.msg.version = 0;
+ buf.msg.command = EC_CMD_HELLO;
+ buf.msg.insize = 0xee + 1;
+ buf.msg.outsize = 2;
+
+ {
+ mock = cros_kunit_ec_xfer_mock_add(test, 0xcc);
+ KUNIT_ASSERT_PTR_NE(test, mock, NULL);
+ }
+
+ ret = cros_ec_cmd_xfer(ec_dev, &buf.msg);
+ KUNIT_EXPECT_EQ(test, ret, 0xcc);
+
+ {
+ mock = cros_kunit_ec_xfer_mock_next();
+ KUNIT_EXPECT_PTR_NE(test, mock, NULL);
+
+ KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
+ KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_HELLO);
+ KUNIT_EXPECT_EQ(test, mock->msg.insize, 0xee);
+ KUNIT_EXPECT_EQ(test, mock->msg.outsize, 2);
+ }
+}
+
+static void cros_ec_proto_test_cmd_xfer_excess_msg_outsize_without_passthru(struct kunit *test)
+{
+ struct cros_ec_proto_test_priv *priv = test->priv;
+ struct cros_ec_device *ec_dev = &priv->ec_dev;
+ int ret;
+ struct {
+ struct cros_ec_command msg;
+ u8 data[0x100];
+ } __packed buf;
+
+ ec_dev->max_request = 0xff;
+ ec_dev->max_response = 0xee;
+ ec_dev->max_passthru = 0xdd;
+
+ buf.msg.version = 0;
+ buf.msg.command = EC_CMD_HELLO;
+ buf.msg.insize = 4;
+ buf.msg.outsize = 0xff + 1;
+
+ ret = cros_ec_cmd_xfer(ec_dev, &buf.msg);
+ KUNIT_EXPECT_EQ(test, ret, -EMSGSIZE);
+}
+
+static void cros_ec_proto_test_cmd_xfer_excess_msg_outsize_with_passthru(struct kunit *test)
+{
+ struct cros_ec_proto_test_priv *priv = test->priv;
+ struct cros_ec_device *ec_dev = &priv->ec_dev;
+ int ret;
+ struct {
+ struct cros_ec_command msg;
+ u8 data[0x100];
+ } __packed buf;
+
+ ec_dev->max_request = 0xff;
+ ec_dev->max_response = 0xee;
+ ec_dev->max_passthru = 0xdd;
+
+ buf.msg.version = 0;
+ buf.msg.command = EC_CMD_PASSTHRU_OFFSET(CROS_EC_DEV_PD_INDEX) + EC_CMD_HELLO;
+ buf.msg.insize = 4;
+ buf.msg.outsize = 0xdd + 1;
+
+ ret = cros_ec_cmd_xfer(ec_dev, &buf.msg);
+ KUNIT_EXPECT_EQ(test, ret, -EMSGSIZE);
+}
+
static void cros_ec_proto_test_release(struct device *dev)
{
}
@@ -1601,6 +1746,10 @@ static struct kunit_case cros_ec_proto_test_cases[] = {
KUNIT_CASE(cros_ec_proto_test_query_all_no_host_sleep_return0),
KUNIT_CASE(cros_ec_proto_test_query_all_default_wake_mask_return_error),
KUNIT_CASE(cros_ec_proto_test_query_all_default_wake_mask_return0),
+ KUNIT_CASE(cros_ec_proto_test_cmd_xfer_normal),
+ KUNIT_CASE(cros_ec_proto_test_cmd_xfer_excess_msg_insize),
+ KUNIT_CASE(cros_ec_proto_test_cmd_xfer_excess_msg_outsize_without_passthru),
+ KUNIT_CASE(cros_ec_proto_test_cmd_xfer_excess_msg_outsize_with_passthru),
{}
};

--
2.36.1.476.g0c4daa206d-goog