[PATCH 03/11] platform/chrome: cros_ec_proto: add Kunit tests for cros_ec_send_command()

Tzung-Bi Shih
2022-06-15T05:15:16Z

cros_ec_cmd_xfer() is the only exported function that calls static
function cros_ec_send_command().

Add Kunit tests for cros_ec_send_command() through calling
cros_ec_cmd_xfer().

Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
---
drivers/platform/chrome/cros_ec_proto_test.c | 265 +++++++++++++++++++
drivers/platform/chrome/cros_kunit_util.c | 20 ++
drivers/platform/chrome/cros_kunit_util.h | 4 +
3 files changed, 289 insertions(+)

diff --git a/drivers/platform/chrome/cros_ec_proto_test.c b/drivers/platform/chrome/cros_ec_proto_test.c
index 33721607a5b9..64100fd81c6a 100644
--- a/drivers/platform/chrome/cros_ec_proto_test.c
+++ b/drivers/platform/chrome/cros_ec_proto_test.c
@@ -1680,6 +1680,262 @@ static void cros_ec_proto_test_cmd_xfer_excess_msg_outsize_with_passthru(struct
KUNIT_EXPECT_EQ(test, ret, -EMSGSIZE);
}

+static void cros_ec_proto_test_cmd_xfer_protocol_v3_normal(struct kunit *test)
+{
+ struct cros_ec_proto_test_priv *priv = test->priv;
+ struct cros_ec_device *ec_dev = &priv->ec_dev;
+ int ret;
+ struct cros_ec_command msg;
+
+ memset(&msg, 0, sizeof(msg));
+
+ ec_dev->proto_version = 3;
+ ec_dev->cmd_xfer = cros_kunit_ec_cmd_xfer_mock;
+ ec_dev->pkt_xfer = cros_kunit_ec_pkt_xfer_mock;
+
+ ret = cros_ec_cmd_xfer(ec_dev, &msg);
+ KUNIT_EXPECT_EQ(test, ret, 0);
+
+ KUNIT_EXPECT_EQ(test, cros_kunit_ec_cmd_xfer_mock_called, 0);
+ KUNIT_EXPECT_EQ(test, cros_kunit_ec_pkt_xfer_mock_called, 1);
+}
+
+static void cros_ec_proto_test_cmd_xfer_protocol_v3_no_op(struct kunit *test)
+{
+ struct cros_ec_proto_test_priv *priv = test->priv;
+ struct cros_ec_device *ec_dev = &priv->ec_dev;
+ int ret;
+ struct cros_ec_command msg;
+
+ memset(&msg, 0, sizeof(msg));
+
+ ec_dev->proto_version = 3;
+ ec_dev->cmd_xfer = cros_kunit_ec_cmd_xfer_mock;
+ ec_dev->pkt_xfer = NULL;
+
+ ret = cros_ec_cmd_xfer(ec_dev, &msg);
+ KUNIT_EXPECT_EQ(test, ret, -EIO);
+}
+
+static void cros_ec_proto_test_cmd_xfer_protocol_v2_normal(struct kunit *test)
+{
+ struct cros_ec_proto_test_priv *priv = test->priv;
+ struct cros_ec_device *ec_dev = &priv->ec_dev;
+ int ret;
+ struct cros_ec_command msg;
+
+ memset(&msg, 0, sizeof(msg));
+
+ ec_dev->proto_version = 2;
+ ec_dev->cmd_xfer = cros_kunit_ec_cmd_xfer_mock;
+ ec_dev->pkt_xfer = cros_kunit_ec_pkt_xfer_mock;
+
+ ret = cros_ec_cmd_xfer(ec_dev, &msg);
+ KUNIT_EXPECT_EQ(test, ret, 0);
+
+ KUNIT_EXPECT_EQ(test, cros_kunit_ec_cmd_xfer_mock_called, 1);
+ KUNIT_EXPECT_EQ(test, cros_kunit_ec_pkt_xfer_mock_called, 0);
+}
+
+static void cros_ec_proto_test_cmd_xfer_protocol_v2_no_op(struct kunit *test)
+{
+ struct cros_ec_proto_test_priv *priv = test->priv;
+ struct cros_ec_device *ec_dev = &priv->ec_dev;
+ int ret;
+ struct cros_ec_command msg;
+
+ memset(&msg, 0, sizeof(msg));
+
+ ec_dev->proto_version = 2;
+ ec_dev->cmd_xfer = NULL;
+ ec_dev->pkt_xfer = cros_kunit_ec_pkt_xfer_mock;
+
+ ret = cros_ec_cmd_xfer(ec_dev, &msg);
+ KUNIT_EXPECT_EQ(test, ret, -EIO);
+}
+
+static void cros_ec_proto_test_cmd_xfer_in_progress_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 cros_ec_command msg;
+
+ memset(&msg, 0, sizeof(msg));
+
+ ec_dev->pkt_xfer = cros_kunit_ec_pkt_xfer_mock;
+
+ /* For the first host command to return EC_RES_IN_PROGRESS. */
+ {
+ mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_IN_PROGRESS, 0);
+ KUNIT_ASSERT_PTR_NE(test, mock, NULL);
+ }
+
+ /* For EC_CMD_GET_COMMS_STATUS. */
+ {
+ struct ec_response_get_comms_status *data;
+
+ mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
+ KUNIT_ASSERT_PTR_NE(test, mock, NULL);
+
+ data = (struct ec_response_get_comms_status *)mock->o_data;
+ data->flags = 0;
+ }
+
+ ret = cros_ec_cmd_xfer(ec_dev, &msg);
+ KUNIT_EXPECT_EQ(test, ret, sizeof(struct ec_response_get_comms_status));
+
+ KUNIT_EXPECT_EQ(test, msg.result, EC_RES_SUCCESS);
+
+ /* For the first host command to return EC_RES_IN_PROGRESS. */
+ {
+ mock = cros_kunit_ec_xfer_mock_next();
+ KUNIT_EXPECT_PTR_NE(test, mock, NULL);
+ }
+
+ /* For EC_CMD_GET_COMMS_STATUS. */
+ {
+ 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_GET_COMMS_STATUS);
+ KUNIT_EXPECT_EQ(test, mock->msg.insize,
+ sizeof(struct ec_response_get_comms_status));
+ KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
+ }
+
+ KUNIT_EXPECT_EQ(test, cros_kunit_ec_pkt_xfer_mock_called, 2);
+}
+
+static void cros_ec_proto_test_cmd_xfer_in_progress_retries_eagain(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 cros_ec_command msg;
+
+ memset(&msg, 0, sizeof(msg));
+
+ ec_dev->pkt_xfer = cros_kunit_ec_pkt_xfer_mock;
+
+ /* For the first host command to return EC_RES_IN_PROGRESS. */
+ {
+ mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_IN_PROGRESS, 0);
+ KUNIT_ASSERT_PTR_NE(test, mock, NULL);
+ }
+
+ /* For EC_CMD_GET_COMMS_STATUS EC_COMMAND_RETRIES times. */
+ cros_kunit_ec_xfer_mock_default_ret = -EAGAIN;
+
+ ret = cros_ec_cmd_xfer(ec_dev, &msg);
+ KUNIT_EXPECT_EQ(test, ret, -EAGAIN);
+
+ /* For EC_CMD_GET_COMMS_STATUS EC_COMMAND_RETRIES times. */
+ KUNIT_EXPECT_EQ(test, cros_kunit_ec_pkt_xfer_mock_called, 51);
+}
+
+static void cros_ec_proto_test_cmd_xfer_in_progress_retries_status_processing(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 cros_ec_command msg;
+
+ memset(&msg, 0, sizeof(msg));
+
+ ec_dev->pkt_xfer = cros_kunit_ec_pkt_xfer_mock;
+
+ /* For the first host command to return EC_RES_IN_PROGRESS. */
+ {
+ mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_IN_PROGRESS, 0);
+ KUNIT_ASSERT_PTR_NE(test, mock, NULL);
+ }
+
+ /* For EC_CMD_GET_COMMS_STATUS EC_COMMAND_RETRIES times. */
+ {
+ struct ec_response_get_comms_status *data;
+ int i;
+
+ for (i = 0; i < 50; ++i) {
+ mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
+ KUNIT_ASSERT_PTR_NE(test, mock, NULL);
+
+ data = (struct ec_response_get_comms_status *)mock->o_data;
+ data->flags |= EC_COMMS_STATUS_PROCESSING;
+ }
+ }
+
+ ret = cros_ec_cmd_xfer(ec_dev, &msg);
+ KUNIT_EXPECT_EQ(test, ret, sizeof(struct ec_response_get_comms_status));
+
+ KUNIT_EXPECT_EQ(test, msg.result, EC_RES_SUCCESS);
+
+ /* For EC_CMD_GET_COMMS_STATUS EC_COMMAND_RETRIES times. */
+ KUNIT_EXPECT_EQ(test, cros_kunit_ec_pkt_xfer_mock_called, 51);
+}
+
+static void cros_ec_proto_test_cmd_xfer_in_progress_xfer_error(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 cros_ec_command msg;
+
+ memset(&msg, 0, sizeof(msg));
+
+ /* For the first host command to return EC_RES_IN_PROGRESS. */
+ {
+ mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_IN_PROGRESS, 0);
+ KUNIT_ASSERT_PTR_NE(test, mock, NULL);
+ }
+
+ /* For EC_CMD_GET_COMMS_STATUS. */
+ {
+ mock = cros_kunit_ec_xfer_mock_addx(test, -EIO, EC_RES_SUCCESS, 0);
+ KUNIT_ASSERT_PTR_NE(test, mock, NULL);
+ }
+
+ ret = cros_ec_cmd_xfer(ec_dev, &msg);
+ KUNIT_EXPECT_EQ(test, ret, -EIO);
+}
+
+static void cros_ec_proto_test_cmd_xfer_in_progress_return_error(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 cros_ec_command msg;
+
+ memset(&msg, 0, sizeof(msg));
+
+ ec_dev->pkt_xfer = cros_kunit_ec_pkt_xfer_mock;
+
+ /* For the first host command to return EC_RES_IN_PROGRESS. */
+ {
+ mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_IN_PROGRESS, 0);
+ KUNIT_ASSERT_PTR_NE(test, mock, NULL);
+ }
+
+ /* For EC_CMD_GET_COMMS_STATUS. */
+ {
+ mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
+ KUNIT_ASSERT_PTR_NE(test, mock, NULL);
+ }
+
+ ret = cros_ec_cmd_xfer(ec_dev, &msg);
+ KUNIT_EXPECT_EQ(test, ret, 0);
+
+ KUNIT_EXPECT_EQ(test, msg.result, EC_RES_INVALID_COMMAND);
+
+ KUNIT_EXPECT_EQ(test, cros_kunit_ec_pkt_xfer_mock_called, 2);
+}
+
static void cros_ec_proto_test_release(struct device *dev)
{
}
@@ -1750,6 +2006,15 @@ static struct kunit_case cros_ec_proto_test_cases[] = {
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),
+ KUNIT_CASE(cros_ec_proto_test_cmd_xfer_protocol_v3_normal),
+ KUNIT_CASE(cros_ec_proto_test_cmd_xfer_protocol_v3_no_op),
+ KUNIT_CASE(cros_ec_proto_test_cmd_xfer_protocol_v2_normal),
+ KUNIT_CASE(cros_ec_proto_test_cmd_xfer_protocol_v2_no_op),
+ KUNIT_CASE(cros_ec_proto_test_cmd_xfer_in_progress_normal),
+ KUNIT_CASE(cros_ec_proto_test_cmd_xfer_in_progress_retries_eagain),
+ KUNIT_CASE(cros_ec_proto_test_cmd_xfer_in_progress_retries_status_processing),
+ KUNIT_CASE(cros_ec_proto_test_cmd_xfer_in_progress_xfer_error),
+ KUNIT_CASE(cros_ec_proto_test_cmd_xfer_in_progress_return_error),
{}
};

diff --git a/drivers/platform/chrome/cros_kunit_util.c b/drivers/platform/chrome/cros_kunit_util.c
index e031777dea87..3ede971e82ee 100644
--- a/drivers/platform/chrome/cros_kunit_util.c
+++ b/drivers/platform/chrome/cros_kunit_util.c
@@ -15,6 +15,10 @@

int cros_kunit_ec_xfer_mock_default_ret;
EXPORT_SYMBOL_GPL(cros_kunit_ec_xfer_mock_default_ret);
+int cros_kunit_ec_cmd_xfer_mock_called;
+EXPORT_SYMBOL_GPL(cros_kunit_ec_cmd_xfer_mock_called);
+int cros_kunit_ec_pkt_xfer_mock_called;
+EXPORT_SYMBOL_GPL(cros_kunit_ec_pkt_xfer_mock_called);

static struct list_head cros_kunit_ec_xfer_mock_in;
static struct list_head cros_kunit_ec_xfer_mock_out;
@@ -46,6 +50,20 @@ int cros_kunit_ec_xfer_mock(struct cros_ec_device *ec_dev, struct cros_ec_comman
}
EXPORT_SYMBOL_GPL(cros_kunit_ec_xfer_mock);

+int cros_kunit_ec_cmd_xfer_mock(struct cros_ec_device *ec_dev, struct cros_ec_command *msg)
+{
+ ++cros_kunit_ec_cmd_xfer_mock_called;
+ return cros_kunit_ec_xfer_mock(ec_dev, msg);
+}
+EXPORT_SYMBOL_GPL(cros_kunit_ec_cmd_xfer_mock);
+
+int cros_kunit_ec_pkt_xfer_mock(struct cros_ec_device *ec_dev, struct cros_ec_command *msg)
+{
+ ++cros_kunit_ec_pkt_xfer_mock_called;
+ return cros_kunit_ec_xfer_mock(ec_dev, msg);
+}
+EXPORT_SYMBOL_GPL(cros_kunit_ec_pkt_xfer_mock);
+
struct ec_xfer_mock *cros_kunit_ec_xfer_mock_add(struct kunit *test, size_t size)
{
return cros_kunit_ec_xfer_mock_addx(test, size, EC_RES_SUCCESS, size);
@@ -90,6 +108,8 @@ EXPORT_SYMBOL_GPL(cros_kunit_ec_xfer_mock_next);
void cros_kunit_mock_reset(void)
{
cros_kunit_ec_xfer_mock_default_ret = 0;
+ cros_kunit_ec_cmd_xfer_mock_called = 0;
+ cros_kunit_ec_pkt_xfer_mock_called = 0;
INIT_LIST_HEAD(&cros_kunit_ec_xfer_mock_in);
INIT_LIST_HEAD(&cros_kunit_ec_xfer_mock_out);
}
diff --git a/drivers/platform/chrome/cros_kunit_util.h b/drivers/platform/chrome/cros_kunit_util.h
index 79c4525f873c..ae4080cb13f1 100644
--- a/drivers/platform/chrome/cros_kunit_util.h
+++ b/drivers/platform/chrome/cros_kunit_util.h
@@ -24,8 +24,12 @@ struct ec_xfer_mock {
};

extern int cros_kunit_ec_xfer_mock_default_ret;
+extern int cros_kunit_ec_cmd_xfer_mock_called;
+extern int cros_kunit_ec_pkt_xfer_mock_called;

int cros_kunit_ec_xfer_mock(struct cros_ec_device *ec_dev, struct cros_ec_command *msg);
+int cros_kunit_ec_cmd_xfer_mock(struct cros_ec_device *ec_dev, struct cros_ec_command *msg);
+int cros_kunit_ec_pkt_xfer_mock(struct cros_ec_device *ec_dev, struct cros_ec_command *msg);
struct ec_xfer_mock *cros_kunit_ec_xfer_mock_add(struct kunit *test, size_t size);
struct ec_xfer_mock *cros_kunit_ec_xfer_mock_addx(struct kunit *test,
int ret, int result, size_t size);
--
2.36.1.476.g0c4daa206d-goog