1// SPDX-License-Identifier: GPL-2.0
2/*
3 * CrOS Kunit tests utilities.
4 */
5
6#include <kunit/test.h>
7
8#include <linux/list.h>
9#include <linux/minmax.h>
10#include <linux/platform_data/cros_ec_commands.h>
11#include <linux/platform_data/cros_ec_proto.h>
12
13#include "cros_ec.h"
14#include "cros_ec_proto_test_util.h"
15
16int cros_kunit_ec_xfer_mock_default_result;
17int cros_kunit_ec_xfer_mock_default_ret;
18int cros_kunit_ec_cmd_xfer_mock_called;
19int cros_kunit_ec_pkt_xfer_mock_called;
20
21static struct list_head cros_kunit_ec_xfer_mock_in;
22static struct list_head cros_kunit_ec_xfer_mock_out;
23
24int cros_kunit_ec_xfer_mock(struct cros_ec_device *ec_dev, struct cros_ec_command *msg)
25{
26	struct ec_xfer_mock *mock;
27
28	mock = list_first_entry_or_null(&cros_kunit_ec_xfer_mock_in, struct ec_xfer_mock, list);
29	if (!mock) {
30		msg->result = cros_kunit_ec_xfer_mock_default_result;
31		return cros_kunit_ec_xfer_mock_default_ret;
32	}
33
34	list_del(&mock->list);
35
36	memcpy(&mock->msg, msg, sizeof(*msg));
37	if (msg->outsize) {
38		mock->i_data = kunit_kzalloc(mock->test, msg->outsize, GFP_KERNEL);
39		if (mock->i_data)
40			memcpy(mock->i_data, msg->data, msg->outsize);
41	}
42
43	msg->result = mock->result;
44	if (msg->insize)
45		memcpy(msg->data, mock->o_data, min(msg->insize, mock->o_data_len));
46
47	list_add_tail(&mock->list, &cros_kunit_ec_xfer_mock_out);
48
49	return mock->ret;
50}
51
52int cros_kunit_ec_cmd_xfer_mock(struct cros_ec_device *ec_dev, struct cros_ec_command *msg)
53{
54	++cros_kunit_ec_cmd_xfer_mock_called;
55	return cros_kunit_ec_xfer_mock(ec_dev, msg);
56}
57
58int cros_kunit_ec_pkt_xfer_mock(struct cros_ec_device *ec_dev, struct cros_ec_command *msg)
59{
60	++cros_kunit_ec_pkt_xfer_mock_called;
61	return cros_kunit_ec_xfer_mock(ec_dev, msg);
62}
63
64struct ec_xfer_mock *cros_kunit_ec_xfer_mock_add(struct kunit *test, size_t size)
65{
66	return cros_kunit_ec_xfer_mock_addx(test, size, EC_RES_SUCCESS, size);
67}
68
69struct ec_xfer_mock *cros_kunit_ec_xfer_mock_addx(struct kunit *test,
70						  int ret, int result, size_t size)
71{
72	struct ec_xfer_mock *mock;
73
74	mock = kunit_kzalloc(test, sizeof(*mock), GFP_KERNEL);
75	if (!mock)
76		return NULL;
77
78	list_add_tail(&mock->list, &cros_kunit_ec_xfer_mock_in);
79	mock->test = test;
80
81	mock->ret = ret;
82	mock->result = result;
83	mock->o_data = kunit_kzalloc(test, size, GFP_KERNEL);
84	if (!mock->o_data)
85		return NULL;
86	mock->o_data_len = size;
87
88	return mock;
89}
90
91struct ec_xfer_mock *cros_kunit_ec_xfer_mock_next(void)
92{
93	struct ec_xfer_mock *mock;
94
95	mock = list_first_entry_or_null(&cros_kunit_ec_xfer_mock_out, struct ec_xfer_mock, list);
96	if (mock)
97		list_del(&mock->list);
98
99	return mock;
100}
101
102int cros_kunit_readmem_mock_offset;
103u8 *cros_kunit_readmem_mock_data;
104int cros_kunit_readmem_mock_ret;
105
106int cros_kunit_readmem_mock(struct cros_ec_device *ec_dev, unsigned int offset,
107			    unsigned int bytes, void *dest)
108{
109	cros_kunit_readmem_mock_offset = offset;
110
111	memcpy(dest, cros_kunit_readmem_mock_data, bytes);
112
113	return cros_kunit_readmem_mock_ret;
114}
115
116void cros_kunit_mock_reset(void)
117{
118	cros_kunit_ec_xfer_mock_default_result = 0;
119	cros_kunit_ec_xfer_mock_default_ret = 0;
120	cros_kunit_ec_cmd_xfer_mock_called = 0;
121	cros_kunit_ec_pkt_xfer_mock_called = 0;
122	INIT_LIST_HEAD(&cros_kunit_ec_xfer_mock_in);
123	INIT_LIST_HEAD(&cros_kunit_ec_xfer_mock_out);
124
125	cros_kunit_readmem_mock_offset = 0;
126	cros_kunit_readmem_mock_data = NULL;
127	cros_kunit_readmem_mock_ret = 0;
128}
129