1// SPDX-License-Identifier: GPL-2.0 AND MIT
2/*
3 * Copyright © 2022 Intel Corporation
4 */
5
6#include <kunit/test.h>
7#include <kunit/visibility.h>
8
9#include "tests/xe_kunit_helpers.h"
10#include "tests/xe_pci_test.h"
11#include "tests/xe_test.h"
12
13#include "xe_device.h"
14#include "xe_gt.h"
15#include "xe_mocs.h"
16#include "xe_pci.h"
17#include "xe_pm.h"
18
19struct live_mocs {
20 struct xe_mocs_info table;
21};
22
23static int live_mocs_init(struct live_mocs *arg, struct xe_gt *gt)
24{
25 unsigned int flags;
26 struct kunit *test = kunit_get_current_test();
27
28 memset(arg, 0, sizeof(*arg));
29
30 flags = get_mocs_settings(gt_to_xe(gt), &arg->table);
31
32 kunit_info(test, "gt %d", gt->info.id);
33 kunit_info(test, "gt type %d", gt->info.type);
34 kunit_info(test, "table size %d", arg->table.table_size);
35 kunit_info(test, "table uc_index %d", arg->table.uc_index);
36 kunit_info(test, "table num_mocs_regs %d", arg->table.num_mocs_regs);
37
38 return flags;
39}
40
41static void read_l3cc_table(struct xe_gt *gt,
42 const struct xe_mocs_info *info)
43{
44 struct kunit *test = kunit_get_current_test();
45 u32 l3cc, l3cc_expected;
46 unsigned int fw_ref, i;
47 u32 reg_val;
48
49 fw_ref = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
50 if (!xe_force_wake_ref_has_domain(fw_ref, XE_FORCEWAKE_ALL)) {
51 xe_force_wake_put(gt_to_fw(gt), fw_ref);
52 KUNIT_FAIL_AND_ABORT(test, "Forcewake Failed.\n");
53 }
54
55 for (i = 0; i < info->num_mocs_regs; i++) {
56 if (!(i & 1)) {
57 if (regs_are_mcr(gt))
58 reg_val = xe_gt_mcr_unicast_read_any(gt, XEHP_LNCFCMOCS(i >> 1));
59 else
60 reg_val = xe_mmio_read32(&gt->mmio, XELP_LNCFCMOCS(i >> 1));
61
62 mocs_dbg(gt, "reg_val=0x%x\n", reg_val);
63 } else {
64 /* Just reuse value read on previous iteration */
65 reg_val >>= 16;
66 }
67
68 l3cc_expected = get_entry_l3cc(info, i);
69 l3cc = reg_val & 0xffff;
70
71 mocs_dbg(gt, "[%u] expected=0x%x actual=0x%x\n",
72 i, l3cc_expected, l3cc);
73
74 KUNIT_EXPECT_EQ_MSG(test, l3cc_expected, l3cc,
75 "l3cc idx=%u has incorrect val.\n", i);
76 }
77 xe_force_wake_put(gt_to_fw(gt), fw_ref);
78}
79
80static void read_mocs_table(struct xe_gt *gt,
81 const struct xe_mocs_info *info)
82{
83 struct kunit *test = kunit_get_current_test();
84 u32 mocs, mocs_expected;
85 unsigned int fw_ref, i;
86 u32 reg_val;
87
88 KUNIT_EXPECT_TRUE_MSG(test, info->unused_entries_index,
89 "Unused entries index should have been defined\n");
90
91 fw_ref = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
92 KUNIT_ASSERT_NE_MSG(test, fw_ref, 0, "Forcewake Failed.\n");
93
94 for (i = 0; i < info->num_mocs_regs; i++) {
95 if (regs_are_mcr(gt))
96 reg_val = xe_gt_mcr_unicast_read_any(gt, XEHP_GLOBAL_MOCS(i));
97 else
98 reg_val = xe_mmio_read32(&gt->mmio, XELP_GLOBAL_MOCS(i));
99
100 mocs_expected = get_entry_control(info, i);
101 mocs = reg_val;
102
103 mocs_dbg(gt, "[%u] expected=0x%x actual=0x%x\n",
104 i, mocs_expected, mocs);
105
106 KUNIT_EXPECT_EQ_MSG(test, mocs_expected, mocs,
107 "mocs reg 0x%x has incorrect val.\n", i);
108 }
109
110 xe_force_wake_put(gt_to_fw(gt), fw_ref);
111}
112
113static int mocs_kernel_test_run_device(struct xe_device *xe)
114{
115 /* Basic check the system is configured with the expected mocs table */
116
117 struct live_mocs mocs;
118 struct xe_gt *gt;
119
120 unsigned int flags;
121 int id;
122
123 xe_pm_runtime_get(xe);
124
125 for_each_gt(gt, xe, id) {
126 flags = live_mocs_init(arg: &mocs, gt);
127 if (flags & HAS_GLOBAL_MOCS)
128 read_mocs_table(gt, info: &mocs.table);
129 if (flags & HAS_LNCF_MOCS)
130 read_l3cc_table(gt, info: &mocs.table);
131 }
132
133 xe_pm_runtime_put(xe);
134
135 return 0;
136}
137
138static void xe_live_mocs_kernel_kunit(struct kunit *test)
139{
140 struct xe_device *xe = test->priv;
141
142 if (IS_SRIOV_VF(xe))
143 kunit_skip(test, "this test is N/A for VF");
144
145 mocs_kernel_test_run_device(xe);
146}
147
148static int mocs_reset_test_run_device(struct xe_device *xe)
149{
150 /* Check the mocs setup is retained over GT reset */
151
152 struct live_mocs mocs;
153 struct xe_gt *gt;
154 unsigned int flags;
155 int id;
156 struct kunit *test = kunit_get_current_test();
157
158 xe_pm_runtime_get(xe);
159
160 for_each_gt(gt, xe, id) {
161 flags = live_mocs_init(arg: &mocs, gt);
162 kunit_info(test, "mocs_reset_test before reset\n");
163 if (flags & HAS_GLOBAL_MOCS)
164 read_mocs_table(gt, info: &mocs.table);
165 if (flags & HAS_LNCF_MOCS)
166 read_l3cc_table(gt, info: &mocs.table);
167
168 xe_gt_reset(gt);
169
170 kunit_info(test, "mocs_reset_test after reset\n");
171 if (flags & HAS_GLOBAL_MOCS)
172 read_mocs_table(gt, info: &mocs.table);
173 if (flags & HAS_LNCF_MOCS)
174 read_l3cc_table(gt, info: &mocs.table);
175 }
176
177 xe_pm_runtime_put(xe);
178
179 return 0;
180}
181
182static void xe_live_mocs_reset_kunit(struct kunit *test)
183{
184 struct xe_device *xe = test->priv;
185
186 if (IS_SRIOV_VF(xe))
187 kunit_skip(test, "this test is N/A for VF");
188
189 mocs_reset_test_run_device(xe);
190}
191
192static struct kunit_case xe_mocs_tests[] = {
193 KUNIT_CASE_PARAM(xe_live_mocs_kernel_kunit, xe_pci_live_device_gen_param),
194 KUNIT_CASE_PARAM(xe_live_mocs_reset_kunit, xe_pci_live_device_gen_param),
195 {}
196};
197
198VISIBLE_IF_KUNIT
199struct kunit_suite xe_mocs_test_suite = {
200 .name = "xe_mocs",
201 .test_cases = xe_mocs_tests,
202 .init = xe_kunit_helper_xe_device_live_test_init,
203};
204EXPORT_SYMBOL_IF_KUNIT(xe_mocs_test_suite);
205

source code of linux/drivers/gpu/drm/xe/tests/xe_mocs.c