drivers/platform/chrome/cros_ec_proto_test_util.c

   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
  16 int cros_kunit_ec_xfer_mock_default_result;
  17 int cros_kunit_ec_xfer_mock_default_ret;
  18 int cros_kunit_ec_cmd_xfer_mock_called;
  19 int cros_kunit_ec_pkt_xfer_mock_called;
  20
  21 static struct list_head cros_kunit_ec_xfer_mock_in;
  22 static struct list_head cros_kunit_ec_xfer_mock_out;
  23
  24 int 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
  52 int 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
  58 int 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
  64 struct 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
  69 struct 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
  91 struct 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
 102 int cros_kunit_readmem_mock_offset;
 103 u8 *cros_kunit_readmem_mock_data;
 104 int cros_kunit_readmem_mock_ret;
 105
 106 int 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
 116 void 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 }