summaryrefslogtreecommitdiff
path: root/kernel/resource_kunit.c
blob: 42d2d8d20f5d54e868d344c1a73835977bc84a39 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
// SPDX-License-Identifier: GPL-2.0+
/*
 * Test cases for API provided by resource.c and ioport.h
 */

#include <kunit/test.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/sizes.h>
#include <linux/mm.h>

#define R0_START	0x0000
#define R0_END		0xffff
#define R1_START	0x1234
#define R1_END		0x2345
#define R2_START	0x4567
#define R2_END		0x5678
#define R3_START	0x6789
#define R3_END		0x789a
#define R4_START	0x2000
#define R4_END		0x7000

static struct resource r0 = { .start = R0_START, .end = R0_END };
static struct resource r1 = { .start = R1_START, .end = R1_END };
static struct resource r2 = { .start = R2_START, .end = R2_END };
static struct resource r3 = { .start = R3_START, .end = R3_END };
static struct resource r4 = { .start = R4_START, .end = R4_END };

struct result {
	struct resource *r1;
	struct resource *r2;
	struct resource r;
	bool ret;
};

static struct result results_for_union[] = {
	{
		.r1 = &r1, .r2 = &r0, .r.start = R0_START, .r.end = R0_END, .ret = true,
	}, {
		.r1 = &r2, .r2 = &r0, .r.start = R0_START, .r.end = R0_END, .ret = true,
	}, {
		.r1 = &r3, .r2 = &r0, .r.start = R0_START, .r.end = R0_END, .ret = true,
	}, {
		.r1 = &r4, .r2 = &r0, .r.start = R0_START, .r.end = R0_END, .ret = true,
	}, {
		.r1 = &r2, .r2 = &r1, .ret = false,
	}, {
		.r1 = &r3, .r2 = &r1, .ret = false,
	}, {
		.r1 = &r4, .r2 = &r1, .r.start = R1_START, .r.end = R4_END, .ret = true,
	}, {
		.r1 = &r2, .r2 = &r3, .ret = false,
	}, {
		.r1 = &r2, .r2 = &r4, .r.start = R4_START, .r.end = R4_END, .ret = true,
	}, {
		.r1 = &r3, .r2 = &r4, .r.start = R4_START, .r.end = R3_END, .ret = true,
	},
};

static struct result results_for_intersection[] = {
	{
		.r1 = &r1, .r2 = &r0, .r.start = R1_START, .r.end = R1_END, .ret = true,
	}, {
		.r1 = &r2, .r2 = &r0, .r.start = R2_START, .r.end = R2_END, .ret = true,
	}, {
		.r1 = &r3, .r2 = &r0, .r.start = R3_START, .r.end = R3_END, .ret = true,
	}, {
		.r1 = &r4, .r2 = &r0, .r.start = R4_START, .r.end = R4_END, .ret = true,
	}, {
		.r1 = &r2, .r2 = &r1, .ret = false,
	}, {
		.r1 = &r3, .r2 = &r1, .ret = false,
	}, {
		.r1 = &r4, .r2 = &r1, .r.start = R4_START, .r.end = R1_END, .ret = true,
	}, {
		.r1 = &r2, .r2 = &r3, .ret = false,
	}, {
		.r1 = &r2, .r2 = &r4, .r.start = R2_START, .r.end = R2_END, .ret = true,
	}, {
		.r1 = &r3, .r2 = &r4, .r.start = R3_START, .r.end = R4_END, .ret = true,
	},
};

static void resource_do_test(struct kunit *test, bool ret, struct resource *r,
			     bool exp_ret, struct resource *exp_r,
			     struct resource *r1, struct resource *r2)
{
	KUNIT_EXPECT_EQ_MSG(test, ret, exp_ret, "Resources %pR %pR", r1, r2);
	KUNIT_EXPECT_EQ_MSG(test, r->start, exp_r->start, "Start elements are not equal");
	KUNIT_EXPECT_EQ_MSG(test, r->end, exp_r->end, "End elements are not equal");
}

static void resource_do_union_test(struct kunit *test, struct result *r)
{
	struct resource result;
	bool ret;

	memset(&result, 0, sizeof(result));
	ret = resource_union(r->r1, r->r2, &result);
	resource_do_test(test, ret, &result, r->ret, &r->r, r->r1, r->r2);

	memset(&result, 0, sizeof(result));
	ret = resource_union(r->r2, r->r1, &result);
	resource_do_test(test, ret, &result, r->ret, &r->r, r->r2, r->r1);
}

static void resource_test_union(struct kunit *test)
{
	struct result *r = results_for_union;
	unsigned int i = 0;

	do {
		resource_do_union_test(test, &r[i]);
	} while (++i < ARRAY_SIZE(results_for_union));
}

static void resource_do_intersection_test(struct kunit *test, struct result *r)
{
	struct resource result;
	bool ret;

	memset(&result, 0, sizeof(result));
	ret = resource_intersection(r->r1, r->r2, &result);
	resource_do_test(test, ret, &result, r->ret, &r->r, r->r1, r->r2);

	memset(&result, 0, sizeof(result));
	ret = resource_intersection(r->r2, r->r1, &result);
	resource_do_test(test, ret, &result, r->ret, &r->r, r->r2, r->r1);
}

static void resource_test_intersection(struct kunit *test)
{
	struct result *r = results_for_intersection;
	unsigned int i = 0;

	do {
		resource_do_intersection_test(test, &r[i]);
	} while (++i < ARRAY_SIZE(results_for_intersection));
}

/*
 * The test resource tree for region_intersects() test:
 *
 * BASE-BASE+1M-1 : Test System RAM 0
 *		  # hole 0 (BASE+1M-BASE+2M)
 * BASE+2M-BASE+3M-1 : Test CXL Window 0
 * BASE+3M-BASE+4M-1 : Test System RAM 1
 * BASE+4M-BASE+7M-1 : Test CXL Window 1
 *   BASE+4M-BASE+5M-1 : Test System RAM 2
 *     BASE+4M+128K-BASE+4M+256K-1: Test Code
 *   BASE+5M-BASE+6M-1 : Test System RAM 3
 */
#define RES_TEST_RAM0_OFFSET	0
#define RES_TEST_RAM0_SIZE	SZ_1M
#define RES_TEST_HOLE0_OFFSET	(RES_TEST_RAM0_OFFSET + RES_TEST_RAM0_SIZE)
#define RES_TEST_HOLE0_SIZE	SZ_1M
#define RES_TEST_WIN0_OFFSET	(RES_TEST_HOLE0_OFFSET + RES_TEST_HOLE0_SIZE)
#define RES_TEST_WIN0_SIZE	SZ_1M
#define RES_TEST_RAM1_OFFSET	(RES_TEST_WIN0_OFFSET + RES_TEST_WIN0_SIZE)
#define RES_TEST_RAM1_SIZE	SZ_1M
#define RES_TEST_WIN1_OFFSET	(RES_TEST_RAM1_OFFSET + RES_TEST_RAM1_SIZE)
#define RES_TEST_WIN1_SIZE	(SZ_1M * 3)
#define RES_TEST_RAM2_OFFSET	RES_TEST_WIN1_OFFSET
#define RES_TEST_RAM2_SIZE	SZ_1M
#define RES_TEST_CODE_OFFSET	(RES_TEST_RAM2_OFFSET + SZ_128K)
#define RES_TEST_CODE_SIZE	SZ_128K
#define RES_TEST_RAM3_OFFSET	(RES_TEST_RAM2_OFFSET + RES_TEST_RAM2_SIZE)
#define RES_TEST_RAM3_SIZE	SZ_1M
#define RES_TEST_TOTAL_SIZE	((RES_TEST_WIN1_OFFSET + RES_TEST_WIN1_SIZE))

static void remove_free_resource(void *ctx)
{
	struct resource *res = (struct resource *)ctx;

	remove_resource(res);
	kfree(res);
}

static void resource_test_request_region(struct kunit *test, struct resource *parent,
					 resource_size_t start, resource_size_t size,
					 const char *name, unsigned long flags)
{
	struct resource *res;

	res = __request_region(parent, start, size, name, flags);
	KUNIT_ASSERT_NOT_NULL(test, res);
	kunit_add_action_or_reset(test, remove_free_resource, res);
}

static void resource_test_insert_resource(struct kunit *test, struct resource *parent,
					  resource_size_t start, resource_size_t size,
					  const char *name, unsigned long flags)
{
	struct resource *res;

	res = kzalloc(sizeof(*res), GFP_KERNEL);
	KUNIT_ASSERT_NOT_NULL(test, res);

	res->name = name;
	res->start = start;
	res->end = start + size - 1;
	res->flags = flags;
	if (insert_resource(parent, res)) {
		kfree(res);
		KUNIT_FAIL_AND_ABORT(test, "Fail to insert resource %pR\n", res);
	}

	kunit_add_action_or_reset(test, remove_free_resource, res);
}

static void resource_test_region_intersects(struct kunit *test)
{
	unsigned long flags =  IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
	struct resource *parent;
	resource_size_t start;

	/* Find an iomem_resource hole to hold test resources */
	parent = alloc_free_mem_region(&iomem_resource, RES_TEST_TOTAL_SIZE, SZ_1M,
				       "test resources");
	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent);
	start = parent->start;
	kunit_add_action_or_reset(test, remove_free_resource, parent);

	resource_test_request_region(test, parent, start + RES_TEST_RAM0_OFFSET,
				     RES_TEST_RAM0_SIZE, "Test System RAM 0", flags);
	resource_test_insert_resource(test, parent, start + RES_TEST_WIN0_OFFSET,
				      RES_TEST_WIN0_SIZE, "Test CXL Window 0",
				      IORESOURCE_MEM);
	resource_test_request_region(test, parent, start + RES_TEST_RAM1_OFFSET,
				     RES_TEST_RAM1_SIZE, "Test System RAM 1", flags);
	resource_test_insert_resource(test, parent, start + RES_TEST_WIN1_OFFSET,
				      RES_TEST_WIN1_SIZE, "Test CXL Window 1",
				      IORESOURCE_MEM);
	resource_test_request_region(test, parent, start + RES_TEST_RAM2_OFFSET,
				     RES_TEST_RAM2_SIZE, "Test System RAM 2", flags);
	resource_test_insert_resource(test, parent, start + RES_TEST_CODE_OFFSET,
				      RES_TEST_CODE_SIZE, "Test Code", flags);
	resource_test_request_region(test, parent, start + RES_TEST_RAM3_OFFSET,
				     RES_TEST_RAM3_SIZE, "Test System RAM 3", flags);
	kunit_release_action(test, remove_free_resource, parent);

	KUNIT_EXPECT_EQ(test, REGION_INTERSECTS,
			region_intersects(start + RES_TEST_RAM0_OFFSET, PAGE_SIZE,
					  IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE));
	KUNIT_EXPECT_EQ(test, REGION_INTERSECTS,
			region_intersects(start + RES_TEST_RAM0_OFFSET +
					  RES_TEST_RAM0_SIZE - PAGE_SIZE, 2 * PAGE_SIZE,
					  IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE));
	KUNIT_EXPECT_EQ(test, REGION_DISJOINT,
			region_intersects(start + RES_TEST_HOLE0_OFFSET, PAGE_SIZE,
					  IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE));
	KUNIT_EXPECT_EQ(test, REGION_DISJOINT,
			region_intersects(start + RES_TEST_HOLE0_OFFSET +
					  RES_TEST_HOLE0_SIZE - PAGE_SIZE, 2 * PAGE_SIZE,
					  IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE));
	KUNIT_EXPECT_EQ(test, REGION_MIXED,
			region_intersects(start + RES_TEST_WIN0_OFFSET +
					  RES_TEST_WIN0_SIZE - PAGE_SIZE, 2 * PAGE_SIZE,
					  IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE));
	KUNIT_EXPECT_EQ(test, REGION_INTERSECTS,
			region_intersects(start + RES_TEST_RAM1_OFFSET +
					  RES_TEST_RAM1_SIZE - PAGE_SIZE, 2 * PAGE_SIZE,
					  IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE));
	KUNIT_EXPECT_EQ(test, REGION_INTERSECTS,
			region_intersects(start + RES_TEST_RAM2_OFFSET +
					  RES_TEST_RAM2_SIZE - PAGE_SIZE, 2 * PAGE_SIZE,
					  IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE));
	KUNIT_EXPECT_EQ(test, REGION_INTERSECTS,
			region_intersects(start + RES_TEST_CODE_OFFSET, PAGE_SIZE,
					  IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE));
	KUNIT_EXPECT_EQ(test, REGION_INTERSECTS,
			region_intersects(start + RES_TEST_RAM2_OFFSET,
					  RES_TEST_RAM2_SIZE + PAGE_SIZE,
					  IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE));
	KUNIT_EXPECT_EQ(test, REGION_MIXED,
			region_intersects(start + RES_TEST_RAM3_OFFSET,
					  RES_TEST_RAM3_SIZE + PAGE_SIZE,
					  IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE));
}

static struct kunit_case resource_test_cases[] = {
	KUNIT_CASE(resource_test_union),
	KUNIT_CASE(resource_test_intersection),
	KUNIT_CASE(resource_test_region_intersects),
	{}
};

static struct kunit_suite resource_test_suite = {
	.name = "resource",
	.test_cases = resource_test_cases,
};
kunit_test_suite(resource_test_suite);

MODULE_DESCRIPTION("I/O Port & Memory Resource manager unit tests");
MODULE_LICENSE("GPL");