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SubjectRe: [PATCH v3 02/23] platform/chrome: cros_ec_proto: add Kunit tests for cros_ec_query_all()
On Wed, Jun 8, 2022 at 4:07 AM Tzung-Bi Shih <tzungbi@kernel.org> wrote:
>
> cros_ec_query_all() sends multiple host commands to EC for querying
> supported protocols and settings.
>
> Add required mock for interacting with cros_ec_query_all() and Kunit
> tests.
>
> Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>

Reviewed-by: Guenter Roeck <groeck@chromium.org>

> ---
> No change from v2.
>
> Changes from v1:
> - Initialize the mock ec_dev->dev more to get rid of kernel WARN().
> - Elaborate more on the test case names.
>
> drivers/platform/chrome/Kconfig | 6 +
> drivers/platform/chrome/Makefile | 1 +
> drivers/platform/chrome/cros_ec_proto_test.c | 802 +++++++++++++++++++
> drivers/platform/chrome/cros_kunit_util.c | 98 +++
> drivers/platform/chrome/cros_kunit_util.h | 36 +
> 5 files changed, 943 insertions(+)
> create mode 100644 drivers/platform/chrome/cros_kunit_util.c
> create mode 100644 drivers/platform/chrome/cros_kunit_util.h
>
> diff --git a/drivers/platform/chrome/Kconfig b/drivers/platform/chrome/Kconfig
> index 4b3d2427e8dd..0b069d874845 100644
> --- a/drivers/platform/chrome/Kconfig
> +++ b/drivers/platform/chrome/Kconfig
> @@ -268,11 +268,17 @@ config CHROMEOS_PRIVACY_SCREEN
> source "drivers/platform/chrome/wilco_ec/Kconfig"
>
> # Kunit test cases
> +config CROS_KUNIT
> + tristate
> + help
> + ChromeOS Kunit.
> +
> config CROS_EC_PROTO_KUNIT_TEST
> tristate "Kunit tests for ChromeOS EC protocol" if !KUNIT_ALL_TESTS
> depends on KUNIT && CROS_EC
> default KUNIT_ALL_TESTS
> select CROS_EC_PROTO
> + select CROS_KUNIT
> help
> Kunit tests for the ChromeOS Embedded Controller protocol.
>
> diff --git a/drivers/platform/chrome/Makefile b/drivers/platform/chrome/Makefile
> index 3c380066c6b6..a06bc56d12a8 100644
> --- a/drivers/platform/chrome/Makefile
> +++ b/drivers/platform/chrome/Makefile
> @@ -32,4 +32,5 @@ obj-$(CONFIG_CROS_USBPD_NOTIFY) += cros_usbpd_notify.o
> obj-$(CONFIG_WILCO_EC) += wilco_ec/
>
> # Kunit test cases
> +obj-$(CONFIG_CROS_KUNIT) += cros_kunit_util.o
> obj-$(CONFIG_CROS_EC_PROTO_KUNIT_TEST) += cros_ec_proto_test.o
> diff --git a/drivers/platform/chrome/cros_ec_proto_test.c b/drivers/platform/chrome/cros_ec_proto_test.c
> index 25c4fca5c165..675306c16d47 100644
> --- a/drivers/platform/chrome/cros_ec_proto_test.c
> +++ b/drivers/platform/chrome/cros_ec_proto_test.c
> @@ -9,6 +9,7 @@
> #include <linux/platform_data/cros_ec_proto.h>
>
> #include "cros_ec.h"
> +#include "cros_kunit_util.h"
>
> #define BUFSIZE 512
>
> @@ -172,6 +173,779 @@ static void cros_ec_proto_test_check_result(struct kunit *test)
> KUNIT_EXPECT_EQ(test, ret, -EAGAIN);
> }
>
> +static void cros_ec_proto_test_query_all_pretest(struct kunit *test)
> +{
> + struct cros_ec_proto_test_priv *priv = test->priv;
> + struct cros_ec_device *ec_dev = &priv->ec_dev;
> +
> + /*
> + * cros_ec_query_all() will free din and dout and allocate them again to fit the usage by
> + * calling devm_kfree() and devm_kzalloc(). Set them to NULL as they aren't managed by
> + * ec_dev->dev but allocated statically in struct cros_ec_proto_test_priv
> + * (see cros_ec_proto_test_init()).
> + */
> + ec_dev->din = NULL;
> + ec_dev->dout = NULL;
> +}
> +
> +static void cros_ec_proto_test_query_all_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;
> +
> + /* For cros_ec_host_command_proto_query() without passthru. */
> + {
> + struct ec_response_get_protocol_info *data;
> +
> + mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> +
> + data = (struct ec_response_get_protocol_info *)mock->o_data;
> + data->protocol_versions = BIT(3) | BIT(2);
> + data->max_request_packet_size = 0xbe;
> + data->max_response_packet_size = 0xef;
> + }
> +
> + /* For cros_ec_host_command_proto_query() with passthru. */
> + {
> + struct ec_response_get_protocol_info *data;
> +
> + mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> +
> + data = (struct ec_response_get_protocol_info *)mock->o_data;
> + data->max_request_packet_size = 0xbf;
> + }
> +
> + /* For cros_ec_get_host_command_version_mask() for MKBP. */
> + {
> + struct ec_response_get_cmd_versions *data;
> +
> + mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> +
> + data = (struct ec_response_get_cmd_versions *)mock->o_data;
> + data->version_mask = BIT(6) | BIT(5);
> + }
> +
> + /* For cros_ec_get_host_command_version_mask() for host sleep v1. */
> + {
> + struct ec_response_get_cmd_versions *data;
> +
> + mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> +
> + data = (struct ec_response_get_cmd_versions *)mock->o_data;
> + data->version_mask = BIT(1);
> + }
> +
> + /* For cros_ec_get_host_event_wake_mask(). */
> + {
> + struct ec_response_host_event_mask *data;
> +
> + mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> +
> + data = (struct ec_response_host_event_mask *)mock->o_data;
> + data->mask = 0xbeef;
> + }
> +
> + cros_ec_proto_test_query_all_pretest(test);
> + ret = cros_ec_query_all(ec_dev);
> + KUNIT_EXPECT_EQ(test, ret, 0);
> +
> + /* For cros_ec_host_command_proto_query() without passthru. */
> + {
> + 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_PROTOCOL_INFO);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize,
> + sizeof(struct ec_response_get_protocol_info));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
> +
> + KUNIT_EXPECT_EQ(test, ec_dev->max_request, 0xbe - sizeof(struct ec_host_request));
> + KUNIT_EXPECT_EQ(test, ec_dev->max_response, 0xef - sizeof(struct ec_host_response));
> + KUNIT_EXPECT_EQ(test, ec_dev->proto_version, 3);
> + KUNIT_EXPECT_EQ(test, ec_dev->din_size, 0xef + EC_MAX_RESPONSE_OVERHEAD);
> + KUNIT_EXPECT_EQ(test, ec_dev->dout_size, 0xbe + EC_MAX_REQUEST_OVERHEAD);
> + }
> +
> + /* For cros_ec_host_command_proto_query() with passthru. */
> + {
> + 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_PASSTHRU_OFFSET(1) | EC_CMD_GET_PROTOCOL_INFO);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize,
> + sizeof(struct ec_response_get_protocol_info));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
> +
> + KUNIT_EXPECT_EQ(test, ec_dev->max_passthru, 0xbf - sizeof(struct ec_host_request));
> + }
> +
> + /* For cros_ec_get_host_command_version_mask() for MKBP. */
> + {
> + struct ec_params_get_cmd_versions *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_GET_CMD_VERSIONS);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize,
> + sizeof(struct ec_response_get_cmd_versions));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(*data));
> +
> + data = (struct ec_params_get_cmd_versions *)mock->i_data;
> + KUNIT_EXPECT_EQ(test, data->cmd, EC_CMD_GET_NEXT_EVENT);
> +
> + KUNIT_EXPECT_EQ(test, ec_dev->mkbp_event_supported, 7);
> + }
> +
> + /* For cros_ec_get_host_command_version_mask() for host sleep v1. */
> + {
> + struct ec_params_get_cmd_versions *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_GET_CMD_VERSIONS);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize,
> + sizeof(struct ec_response_get_cmd_versions));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(*data));
> +
> + data = (struct ec_params_get_cmd_versions *)mock->i_data;
> + KUNIT_EXPECT_EQ(test, data->cmd, EC_CMD_HOST_SLEEP_EVENT);
> +
> + KUNIT_EXPECT_TRUE(test, ec_dev->host_sleep_v1);
> + }
> +
> + /* For cros_ec_get_host_event_wake_mask(). */
> + {
> + 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_HOST_EVENT_GET_WAKE_MASK);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize, sizeof(struct ec_response_host_event_mask));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
> +
> + KUNIT_EXPECT_EQ(test, ec_dev->host_event_wake_mask, 0xbeef);
> + }
> +}
> +
> +static void cros_ec_proto_test_query_all_no_pd_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;
> +
> + /* Set some garbage bytes. */
> + ec_dev->max_passthru = 0xbf;
> +
> + /* For cros_ec_host_command_proto_query() without passthru. */
> + {
> + struct ec_response_get_protocol_info *data;
> +
> + mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> +
> + /*
> + * Although it doesn't check the value, provides valid sizes so that
> + * cros_ec_query_all() allocates din and dout correctly.
> + */
> + data = (struct ec_response_get_protocol_info *)mock->o_data;
> + data->max_request_packet_size = 0xbe;
> + data->max_response_packet_size = 0xef;
> + }
> +
> + /* For cros_ec_host_command_proto_query() with passthru. */
> + {
> + mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> + }
> +
> + cros_ec_proto_test_query_all_pretest(test);
> + ret = cros_ec_query_all(ec_dev);
> + KUNIT_EXPECT_EQ(test, ret, 0);
> +
> + /* For cros_ec_host_command_proto_query() without passthru. */
> + {
> + 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_PROTOCOL_INFO);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize,
> + sizeof(struct ec_response_get_protocol_info));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
> + }
> +
> + /* For cros_ec_host_command_proto_query() with passthru. */
> + {
> + 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_PASSTHRU_OFFSET(1) | EC_CMD_GET_PROTOCOL_INFO);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize,
> + sizeof(struct ec_response_get_protocol_info));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
> +
> + KUNIT_EXPECT_EQ(test, ec_dev->max_passthru, 0);
> + }
> +}
> +
> +static void cros_ec_proto_test_query_all_legacy_normal_v3_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;
> +
> + /* For cros_ec_host_command_proto_query() without passthru. */
> + {
> + mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> + }
> +
> + /* For cros_ec_host_command_proto_query_v2(). */
> + {
> + struct ec_response_hello *data;
> +
> + mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> +
> + data = (struct ec_response_hello *)mock->o_data;
> + data->out_data = 0xa1b2c3d4;
> + }
> +
> + cros_ec_proto_test_query_all_pretest(test);
> + ret = cros_ec_query_all(ec_dev);
> + KUNIT_EXPECT_EQ(test, ret, 0);
> +
> + /* For cros_ec_host_command_proto_query() without passthru. */
> + {
> + 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_PROTOCOL_INFO);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize,
> + sizeof(struct ec_response_get_protocol_info));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
> + }
> +
> + /* For cros_ec_host_command_proto_query_v2(). */
> + {
> + struct ec_params_hello *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, sizeof(struct ec_response_hello));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(*data));
> +
> + data = (struct ec_params_hello *)mock->i_data;
> + KUNIT_EXPECT_EQ(test, data->in_data, 0xa0b0c0d0);
> +
> + KUNIT_EXPECT_EQ(test, ec_dev->proto_version, 2);
> + KUNIT_EXPECT_EQ(test, ec_dev->max_request, EC_PROTO2_MAX_PARAM_SIZE);
> + KUNIT_EXPECT_EQ(test, ec_dev->max_response, EC_PROTO2_MAX_PARAM_SIZE);
> + KUNIT_EXPECT_EQ(test, ec_dev->max_passthru, 0);
> + KUNIT_EXPECT_PTR_EQ(test, ec_dev->pkt_xfer, NULL);
> + KUNIT_EXPECT_EQ(test, ec_dev->din_size, EC_PROTO2_MSG_BYTES);
> + KUNIT_EXPECT_EQ(test, ec_dev->dout_size, EC_PROTO2_MSG_BYTES);
> + }
> +}
> +
> +static void cros_ec_proto_test_query_all_legacy_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;
> +
> + /* For cros_ec_host_command_proto_query() without passthru. */
> + {
> + mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> + }
> +
> + /* For cros_ec_host_command_proto_query_v2(). */
> + {
> + mock = cros_kunit_ec_xfer_mock_addx(test, -EIO, EC_RES_SUCCESS, 0);
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> + }
> +
> + cros_ec_proto_test_query_all_pretest(test);
> + ret = cros_ec_query_all(ec_dev);
> + KUNIT_EXPECT_EQ(test, ret, -EIO);
> + KUNIT_EXPECT_EQ(test, ec_dev->proto_version, EC_PROTO_VERSION_UNKNOWN);
> +
> + /* For cros_ec_host_command_proto_query() without passthru. */
> + {
> + 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_PROTOCOL_INFO);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize,
> + sizeof(struct ec_response_get_protocol_info));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
> + }
> +
> + /* For cros_ec_host_command_proto_query_v2(). */
> + {
> + 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, sizeof(struct ec_response_hello));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(struct ec_params_hello));
> + }
> +}
> +
> +static void cros_ec_proto_test_query_all_legacy_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;
> +
> + /* For cros_ec_host_command_proto_query() without passthru. */
> + {
> + mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> + }
> +
> + /* For cros_ec_host_command_proto_query_v2(). */
> + {
> + mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> + }
> +
> + cros_ec_proto_test_query_all_pretest(test);
> + ret = cros_ec_query_all(ec_dev);
> + KUNIT_EXPECT_EQ(test, ret, EC_RES_INVALID_COMMAND);
> + KUNIT_EXPECT_EQ(test, ec_dev->proto_version, EC_PROTO_VERSION_UNKNOWN);
> +
> + /* For cros_ec_host_command_proto_query() without passthru. */
> + {
> + 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_PROTOCOL_INFO);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize,
> + sizeof(struct ec_response_get_protocol_info));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
> + }
> +
> + /* For cros_ec_host_command_proto_query_v2(). */
> + {
> + 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, sizeof(struct ec_response_hello));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(struct ec_params_hello));
> + }
> +}
> +
> +static void cros_ec_proto_test_query_all_legacy_data_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;
> +
> + /* For cros_ec_host_command_proto_query() without passthru. */
> + {
> + mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> + }
> +
> + /* For cros_ec_host_command_proto_query_v2(). */
> + {
> + struct ec_response_hello *data;
> +
> + mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> +
> + data = (struct ec_response_hello *)mock->o_data;
> + data->out_data = 0xbeefbfbf;
> + }
> +
> + cros_ec_proto_test_query_all_pretest(test);
> + ret = cros_ec_query_all(ec_dev);
> + KUNIT_EXPECT_EQ(test, ret, -EBADMSG);
> + KUNIT_EXPECT_EQ(test, ec_dev->proto_version, EC_PROTO_VERSION_UNKNOWN);
> +
> + /* For cros_ec_host_command_proto_query() without passthru. */
> + {
> + 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_PROTOCOL_INFO);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize,
> + sizeof(struct ec_response_get_protocol_info));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
> + }
> +
> + /* For cros_ec_host_command_proto_query_v2(). */
> + {
> + 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, sizeof(struct ec_response_hello));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(struct ec_params_hello));
> + }
> +}
> +
> +static void cros_ec_proto_test_query_all_no_mkbp(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;
> +
> + /* Set some garbage bytes. */
> + ec_dev->mkbp_event_supported = 0xbf;
> +
> + /* For cros_ec_host_command_proto_query() without passthru. */
> + {
> + struct ec_response_get_protocol_info *data;
> +
> + mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> +
> + /*
> + * Although it doesn't check the value, provides valid sizes so that
> + * cros_ec_query_all() allocates din and dout correctly.
> + */
> + data = (struct ec_response_get_protocol_info *)mock->o_data;
> + data->max_request_packet_size = 0xbe;
> + data->max_response_packet_size = 0xef;
> + }
> +
> + /* For cros_ec_host_command_proto_query() with passthru. */
> + {
> + mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> + }
> +
> + /* For cros_ec_get_host_command_version_mask() for MKBP. */
> + {
> + struct ec_response_get_cmd_versions *data;
> +
> + mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> +
> + data = (struct ec_response_get_cmd_versions *)mock->o_data;
> + data->version_mask = 0;
> + }
> +
> + cros_ec_proto_test_query_all_pretest(test);
> + ret = cros_ec_query_all(ec_dev);
> + KUNIT_EXPECT_EQ(test, ret, 0);
> +
> + /* For cros_ec_host_command_proto_query() without passthru. */
> + {
> + 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_PROTOCOL_INFO);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize,
> + sizeof(struct ec_response_get_protocol_info));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
> + }
> +
> + /* For cros_ec_host_command_proto_query() with passthru. */
> + {
> + 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_PASSTHRU_OFFSET(1) | EC_CMD_GET_PROTOCOL_INFO);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize,
> + sizeof(struct ec_response_get_protocol_info));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
> + }
> +
> + /* For cros_ec_get_host_command_version_mask() for MKBP. */
> + {
> + struct ec_params_get_cmd_versions *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_GET_CMD_VERSIONS);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize,
> + sizeof(struct ec_response_get_cmd_versions));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(*data));
> +
> + data = (struct ec_params_get_cmd_versions *)mock->i_data;
> + KUNIT_EXPECT_EQ(test, data->cmd, EC_CMD_GET_NEXT_EVENT);
> +
> + KUNIT_EXPECT_EQ(test, ec_dev->mkbp_event_supported, 0);
> + }
> +}
> +
> +static void cros_ec_proto_test_query_all_no_host_sleep(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;
> +
> + /* Set some garbage bytes. */
> + ec_dev->host_sleep_v1 = true;
> +
> + /* For cros_ec_host_command_proto_query() without passthru. */
> + {
> + struct ec_response_get_protocol_info *data;
> +
> + mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> +
> + /*
> + * Although it doesn't check the value, provides valid sizes so that
> + * cros_ec_query_all() allocates din and dout correctly.
> + */
> + data = (struct ec_response_get_protocol_info *)mock->o_data;
> + data->max_request_packet_size = 0xbe;
> + data->max_response_packet_size = 0xef;
> + }
> +
> + /* For cros_ec_host_command_proto_query() with passthru. */
> + {
> + mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> + }
> +
> + /* For cros_ec_get_host_command_version_mask() for MKBP. */
> + {
> + mock = cros_kunit_ec_xfer_mock_add(test, 0);
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> + }
> +
> + /* For cros_ec_get_host_command_version_mask() for host sleep v1. */
> + {
> + struct ec_response_get_cmd_versions *data;
> +
> + mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> +
> + data = (struct ec_response_get_cmd_versions *)mock->o_data;
> + data->version_mask = 0;
> + }
> +
> + cros_ec_proto_test_query_all_pretest(test);
> + ret = cros_ec_query_all(ec_dev);
> + KUNIT_EXPECT_EQ(test, ret, 0);
> +
> + /* For cros_ec_host_command_proto_query() without passthru. */
> + {
> + 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_PROTOCOL_INFO);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize,
> + sizeof(struct ec_response_get_protocol_info));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
> + }
> +
> + /* For cros_ec_host_command_proto_query() with passthru. */
> + {
> + 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_PASSTHRU_OFFSET(1) | EC_CMD_GET_PROTOCOL_INFO);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize,
> + sizeof(struct ec_response_get_protocol_info));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
> + }
> +
> + /* For cros_ec_get_host_command_version_mask() for MKBP. */
> + {
> + 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_CMD_VERSIONS);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize,
> + sizeof(struct ec_response_get_cmd_versions));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(struct ec_params_get_cmd_versions));
> + }
> +
> + /* For cros_ec_get_host_command_version_mask() for host sleep v1. */
> + {
> + 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_CMD_VERSIONS);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize,
> + sizeof(struct ec_response_get_cmd_versions));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(struct ec_params_get_cmd_versions));
> +
> + KUNIT_EXPECT_FALSE(test, ec_dev->host_sleep_v1);
> + }
> +}
> +
> +static void cros_ec_proto_test_query_all_default_wake_mask_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;
> +
> + /* Set some garbage bytes. */
> + ec_dev->host_event_wake_mask = U32_MAX;
> +
> + /* For cros_ec_host_command_proto_query() without passthru. */
> + {
> + struct ec_response_get_protocol_info *data;
> +
> + mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> +
> + /*
> + * Although it doesn't check the value, provides valid sizes so that
> + * cros_ec_query_all() allocates din and dout correctly.
> + */
> + data = (struct ec_response_get_protocol_info *)mock->o_data;
> + data->max_request_packet_size = 0xbe;
> + data->max_response_packet_size = 0xef;
> + }
> +
> + /* For cros_ec_host_command_proto_query() with passthru. */
> + {
> + mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> + }
> +
> + /* For cros_ec_get_host_command_version_mask() for MKBP. */
> + {
> + mock = cros_kunit_ec_xfer_mock_add(test, 0);
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> + }
> +
> + /* For cros_ec_get_host_command_version_mask() for host sleep v1. */
> + {
> + mock = cros_kunit_ec_xfer_mock_add(test, 0);
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> + }
> +
> + /* For cros_ec_get_host_event_wake_mask(). */
> + {
> + mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
> + KUNIT_ASSERT_PTR_NE(test, mock, NULL);
> + }
> +
> + cros_ec_proto_test_query_all_pretest(test);
> + ret = cros_ec_query_all(ec_dev);
> + KUNIT_EXPECT_EQ(test, ret, 0);
> +
> + /* For cros_ec_host_command_proto_query() without passthru. */
> + {
> + 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_PROTOCOL_INFO);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize,
> + sizeof(struct ec_response_get_protocol_info));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
> + }
> +
> + /* For cros_ec_host_command_proto_query() with passthru. */
> + {
> + 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_PASSTHRU_OFFSET(1) | EC_CMD_GET_PROTOCOL_INFO);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize,
> + sizeof(struct ec_response_get_protocol_info));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
> + }
> +
> + /* For cros_ec_get_host_command_version_mask() for MKBP. */
> + {
> + 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_CMD_VERSIONS);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize,
> + sizeof(struct ec_response_get_cmd_versions));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(struct ec_params_get_cmd_versions));
> + }
> +
> + /* For cros_ec_get_host_command_version_mask() for host sleep v1. */
> + {
> + 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_CMD_VERSIONS);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize,
> + sizeof(struct ec_response_get_cmd_versions));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(struct ec_params_get_cmd_versions));
> + }
> +
> + /* For cros_ec_get_host_event_wake_mask(). */
> + {
> + u32 mask;
> +
> + 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_HOST_EVENT_GET_WAKE_MASK);
> + KUNIT_EXPECT_EQ(test, mock->msg.insize, sizeof(struct ec_response_host_event_mask));
> + KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
> +
> + mask = ec_dev->host_event_wake_mask;
> + KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_CLOSED), 0);
> + KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_AC_DISCONNECTED), 0);
> + KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_LOW), 0);
> + KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_CRITICAL), 0);
> + KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY), 0);
> + KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_PD_MCU), 0);
> + KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_STATUS), 0);
> + }
> +}
> +
> +static void cros_ec_proto_test_release(struct device *dev)
> +{
> +}
> +
> static int cros_ec_proto_test_init(struct kunit *test)
> {
> struct cros_ec_proto_test_priv *priv;
> @@ -188,24 +962,52 @@ static int cros_ec_proto_test_init(struct kunit *test)
> ec_dev->din = (u8 *)priv->din;
> ec_dev->din_size = ARRAY_SIZE(priv->din);
> ec_dev->proto_version = EC_HOST_REQUEST_VERSION;
> + ec_dev->dev = kunit_kzalloc(test, sizeof(*ec_dev->dev), GFP_KERNEL);
> + if (!ec_dev->dev)
> + return -ENOMEM;
> + device_initialize(ec_dev->dev);
> + dev_set_name(ec_dev->dev, "cros_ec_proto_test");
> + ec_dev->dev->release = cros_ec_proto_test_release;
> + ec_dev->cmd_xfer = cros_kunit_ec_xfer_mock;
> + ec_dev->pkt_xfer = cros_kunit_ec_xfer_mock;
>
> priv->msg = (struct cros_ec_command *)priv->_msg;
>
> + cros_kunit_mock_reset();
> +
> return 0;
> }
>
> +static void cros_ec_proto_test_exit(struct kunit *test)
> +{
> + struct cros_ec_proto_test_priv *priv = test->priv;
> + struct cros_ec_device *ec_dev = &priv->ec_dev;
> +
> + put_device(ec_dev->dev);
> +}
> +
> static struct kunit_case cros_ec_proto_test_cases[] = {
> KUNIT_CASE(cros_ec_proto_test_prepare_tx_legacy_normal),
> KUNIT_CASE(cros_ec_proto_test_prepare_tx_legacy_bad_msg_outsize),
> KUNIT_CASE(cros_ec_proto_test_prepare_tx_normal),
> KUNIT_CASE(cros_ec_proto_test_prepare_tx_bad_msg_outsize),
> KUNIT_CASE(cros_ec_proto_test_check_result),
> + KUNIT_CASE(cros_ec_proto_test_query_all_normal),
> + KUNIT_CASE(cros_ec_proto_test_query_all_no_pd_return_error),
> + KUNIT_CASE(cros_ec_proto_test_query_all_legacy_normal_v3_return_error),
> + KUNIT_CASE(cros_ec_proto_test_query_all_legacy_xfer_error),
> + KUNIT_CASE(cros_ec_proto_test_query_all_legacy_return_error),
> + KUNIT_CASE(cros_ec_proto_test_query_all_legacy_data_error),
> + KUNIT_CASE(cros_ec_proto_test_query_all_no_mkbp),
> + KUNIT_CASE(cros_ec_proto_test_query_all_no_host_sleep),
> + KUNIT_CASE(cros_ec_proto_test_query_all_default_wake_mask_return_error),
> {}
> };
>
> static struct kunit_suite cros_ec_proto_test_suite = {
> .name = "cros_ec_proto_test",
> .init = cros_ec_proto_test_init,
> + .exit = cros_ec_proto_test_exit,
> .test_cases = cros_ec_proto_test_cases,
> };
>
> diff --git a/drivers/platform/chrome/cros_kunit_util.c b/drivers/platform/chrome/cros_kunit_util.c
> new file mode 100644
> index 000000000000..e031777dea87
> --- /dev/null
> +++ b/drivers/platform/chrome/cros_kunit_util.c
> @@ -0,0 +1,98 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * CrOS Kunit tests utilities.
> + */
> +
> +#include <kunit/test.h>
> +
> +#include <linux/list.h>
> +#include <linux/minmax.h>
> +#include <linux/platform_data/cros_ec_commands.h>
> +#include <linux/platform_data/cros_ec_proto.h>
> +
> +#include "cros_ec.h"
> +#include "cros_kunit_util.h"
> +
> +int cros_kunit_ec_xfer_mock_default_ret;
> +EXPORT_SYMBOL_GPL(cros_kunit_ec_xfer_mock_default_ret);
> +
> +static struct list_head cros_kunit_ec_xfer_mock_in;
> +static struct list_head cros_kunit_ec_xfer_mock_out;
> +
> +int cros_kunit_ec_xfer_mock(struct cros_ec_device *ec_dev, struct cros_ec_command *msg)
> +{
> + struct ec_xfer_mock *mock;
> +
> + mock = list_first_entry_or_null(&cros_kunit_ec_xfer_mock_in, struct ec_xfer_mock, list);
> + if (!mock)
> + return cros_kunit_ec_xfer_mock_default_ret;
> +
> + list_del(&mock->list);
> +
> + memcpy(&mock->msg, msg, sizeof(*msg));
> + if (msg->outsize) {
> + mock->i_data = kunit_kzalloc(mock->test, msg->outsize, GFP_KERNEL);
> + if (mock->i_data)
> + memcpy(mock->i_data, msg->data, msg->outsize);
> + }
> +
> + msg->result = mock->result;
> + if (msg->insize)
> + memcpy(msg->data, mock->o_data, min(msg->insize, mock->o_data_len));
> +
> + list_add_tail(&mock->list, &cros_kunit_ec_xfer_mock_out);
> +
> + return mock->ret;
> +}
> +EXPORT_SYMBOL_GPL(cros_kunit_ec_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);
> +}
> +EXPORT_SYMBOL_GPL(cros_kunit_ec_xfer_mock_add);
> +
> +struct ec_xfer_mock *cros_kunit_ec_xfer_mock_addx(struct kunit *test,
> + int ret, int result, size_t size)
> +{
> + struct ec_xfer_mock *mock;
> +
> + mock = kunit_kzalloc(test, sizeof(*mock), GFP_KERNEL);
> + if (!mock)
> + return NULL;
> +
> + list_add_tail(&mock->list, &cros_kunit_ec_xfer_mock_in);
> + mock->test = test;
> +
> + mock->ret = ret;
> + mock->result = result;
> + mock->o_data = kunit_kzalloc(test, size, GFP_KERNEL);
> + if (!mock->o_data)
> + return NULL;
> + mock->o_data_len = size;
> +
> + return mock;
> +}
> +EXPORT_SYMBOL_GPL(cros_kunit_ec_xfer_mock_addx);
> +
> +struct ec_xfer_mock *cros_kunit_ec_xfer_mock_next(void)
> +{
> + struct ec_xfer_mock *mock;
> +
> + mock = list_first_entry_or_null(&cros_kunit_ec_xfer_mock_out, struct ec_xfer_mock, list);
> + if (mock)
> + list_del(&mock->list);
> +
> + return mock;
> +}
> +EXPORT_SYMBOL_GPL(cros_kunit_ec_xfer_mock_next);
> +
> +void cros_kunit_mock_reset(void)
> +{
> + cros_kunit_ec_xfer_mock_default_ret = 0;
> + INIT_LIST_HEAD(&cros_kunit_ec_xfer_mock_in);
> + INIT_LIST_HEAD(&cros_kunit_ec_xfer_mock_out);
> +}
> +EXPORT_SYMBOL_GPL(cros_kunit_mock_reset);
> +
> +MODULE_LICENSE("GPL");
> diff --git a/drivers/platform/chrome/cros_kunit_util.h b/drivers/platform/chrome/cros_kunit_util.h
> new file mode 100644
> index 000000000000..79c4525f873c
> --- /dev/null
> +++ b/drivers/platform/chrome/cros_kunit_util.h
> @@ -0,0 +1,36 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * CrOS Kunit tests utilities.
> + */
> +
> +#ifndef _CROS_KUNIT_UTIL_H_
> +#define _CROS_KUNIT_UTIL_H_
> +
> +#include <linux/platform_data/cros_ec_proto.h>
> +
> +struct ec_xfer_mock {
> + struct list_head list;
> + struct kunit *test;
> +
> + /* input */
> + struct cros_ec_command msg;
> + void *i_data;
> +
> + /* output */
> + int ret;
> + int result;
> + void *o_data;
> + u32 o_data_len;
> +};
> +
> +extern int cros_kunit_ec_xfer_mock_default_ret;
> +
> +int cros_kunit_ec_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);
> +struct ec_xfer_mock *cros_kunit_ec_xfer_mock_next(void);
> +
> +void cros_kunit_mock_reset(void);
> +
> +#endif
> --
> 2.36.1.255.ge46751e96f-goog
>

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