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1 /*
2  * Copyright (c) 2016 NextThing Co
3  * Copyright (c) 2016 Free Electrons
4  *
5  * SPDX-License-Identifier:     GPL-2.0+
6  */
7
8 #include <common.h>
9 #include <command.h>
10 #include <errno.h>
11 #include <malloc.h>
12
13 #include <linux/sizes.h>
14
15 #include <test/ut.h>
16 #include <test/overlay.h>
17
18 /* 4k ought to be enough for anybody */
19 #define FDT_COPY_SIZE   (4 * SZ_1K)
20
21 extern u32 __dtb_test_fdt_base_begin;
22 extern u32 __dtb_test_fdt_overlay_begin;
23
24 static int fdt_getprop_u32_by_index(void *fdt, const char *path,
25                                     const char *name, int index,
26                                     u32 *out)
27 {
28         const fdt32_t *val;
29         int node_off;
30         int len;
31
32         node_off = fdt_path_offset(fdt, path);
33         if (node_off < 0)
34                 return node_off;
35
36         val = fdt_getprop(fdt, node_off, name, &len);
37         if (!val || (len < (sizeof(uint32_t) * (index + 1))))
38                 return -FDT_ERR_NOTFOUND;
39
40         *out = fdt32_to_cpu(*(val + index));
41
42         return 0;
43 }
44
45 static int fdt_getprop_u32(void *fdt, const char *path, const char *name,
46                            u32 *out)
47 {
48         return fdt_getprop_u32_by_index(fdt, path, name, 0, out);
49 }
50
51 static int fdt_getprop_str(void *fdt, const char *path, const char *name,
52                            const char **out)
53 {
54         int node_off;
55         int len;
56
57         node_off = fdt_path_offset(fdt, path);
58         if (node_off < 0)
59                 return node_off;
60
61         *out = fdt_stringlist_get(fdt, node_off, name, 0, &len);
62
63         return len < 0 ? len : 0;
64 }
65
66 static int fdt_overlay_change_int_property(struct unit_test_state *uts)
67 {
68         void *fdt = uts->priv;
69         u32 val = 0;
70
71         ut_assertok(fdt_getprop_u32(fdt, "/test-node", "test-int-property",
72                                     &val));
73         ut_asserteq(43, val);
74
75         return CMD_RET_SUCCESS;
76 }
77 OVERLAY_TEST(fdt_overlay_change_int_property, 0);
78
79 static int fdt_overlay_change_str_property(struct unit_test_state *uts)
80 {
81         void *fdt = uts->priv;
82         const char *val = NULL;
83
84         ut_assertok(fdt_getprop_str(fdt, "/test-node", "test-str-property",
85                                     &val));
86         ut_asserteq_str("foobar", val);
87
88         return CMD_RET_SUCCESS;
89 }
90 OVERLAY_TEST(fdt_overlay_change_str_property, 0);
91
92 static int fdt_overlay_add_str_property(struct unit_test_state *uts)
93 {
94         void *fdt = uts->priv;
95         const char *val = NULL;
96
97         ut_assertok(fdt_getprop_str(fdt, "/test-node", "test-str-property-2",
98                                     &val));
99         ut_asserteq_str("foobar2", val);
100
101         return CMD_RET_SUCCESS;
102 }
103 OVERLAY_TEST(fdt_overlay_add_str_property, 0);
104
105 static int fdt_overlay_add_node_by_phandle(struct unit_test_state *uts)
106 {
107         void *fdt = uts->priv;
108         int off;
109
110         off = fdt_path_offset(fdt, "/test-node/new-node");
111         ut_assert(off >= 0);
112
113         ut_assertnonnull(fdt_getprop(fdt, off, "new-property", NULL));
114
115         return CMD_RET_SUCCESS;
116 }
117 OVERLAY_TEST(fdt_overlay_add_node_by_phandle, 0);
118
119 static int fdt_overlay_add_node_by_path(struct unit_test_state *uts)
120 {
121         void *fdt = uts->priv;
122         int off;
123
124         off = fdt_path_offset(fdt, "/new-node");
125         ut_assert(off >= 0);
126
127         ut_assertnonnull(fdt_getprop(fdt, off, "new-property", NULL));
128
129         return CMD_RET_SUCCESS;
130 }
131 OVERLAY_TEST(fdt_overlay_add_node_by_path, 0);
132
133 static int fdt_overlay_add_subnode_property(struct unit_test_state *uts)
134 {
135         void *fdt = uts->priv;
136         int off;
137
138         off = fdt_path_offset(fdt, "/test-node/sub-test-node");
139         ut_assert(off >= 0);
140
141         ut_assertnonnull(fdt_getprop(fdt, off, "sub-test-property", NULL));
142         ut_assertnonnull(fdt_getprop(fdt, off, "new-sub-test-property", NULL));
143
144         return CMD_RET_SUCCESS;
145 }
146 OVERLAY_TEST(fdt_overlay_add_subnode_property, 0);
147
148 static int fdt_overlay_local_phandle(struct unit_test_state *uts)
149 {
150         uint32_t local_phandle;
151         void *fdt = uts->priv;
152         u32 val = 0;
153         int off;
154
155         off = fdt_path_offset(fdt, "/new-local-node");
156         ut_assert(off >= 0);
157
158         local_phandle = fdt_get_phandle(fdt, off);
159         ut_assert(local_phandle);
160
161         ut_assertok(fdt_getprop_u32_by_index(fdt, "/", "test-several-phandle",
162                                              0, &val));
163         ut_asserteq(local_phandle, val);
164
165         ut_assertok(fdt_getprop_u32_by_index(fdt, "/", "test-several-phandle",
166                                              1, &val));
167         ut_asserteq(local_phandle, val);
168
169         return CMD_RET_SUCCESS;
170 }
171 OVERLAY_TEST(fdt_overlay_local_phandle, 0);
172
173 static int fdt_overlay_local_phandles(struct unit_test_state *uts)
174 {
175         uint32_t local_phandle, test_phandle;
176         void *fdt = uts->priv;
177         u32 val = 0;
178         int off;
179
180         off = fdt_path_offset(fdt, "/new-local-node");
181         ut_assert(off >= 0);
182
183         local_phandle = fdt_get_phandle(fdt, off);
184         ut_assert(local_phandle);
185
186         off = fdt_path_offset(fdt, "/test-node");
187         ut_assert(off >= 0);
188
189         test_phandle = fdt_get_phandle(fdt, off);
190         ut_assert(test_phandle);
191
192         ut_assertok(fdt_getprop_u32_by_index(fdt, "/", "test-phandle", 0,
193                                              &val));
194         ut_asserteq(test_phandle, val);
195
196         ut_assertok(fdt_getprop_u32_by_index(fdt, "/", "test-phandle", 1,
197                                              &val));
198         ut_asserteq(local_phandle, val);
199
200         return CMD_RET_SUCCESS;
201 }
202 OVERLAY_TEST(fdt_overlay_local_phandles, 0);
203
204 int do_ut_overlay(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
205 {
206         struct unit_test *tests = ll_entry_start(struct unit_test,
207                                                  overlay_test);
208         const int n_ents = ll_entry_count(struct unit_test, overlay_test);
209         struct unit_test_state *uts;
210         struct unit_test *test;
211         void *fdt_base = &__dtb_test_fdt_base_begin;
212         void *fdt_overlay = &__dtb_test_fdt_overlay_begin;
213         void *fdt_base_copy, *fdt_overlay_copy;
214
215         uts = calloc(1, sizeof(*uts));
216         if (!uts)
217                 return -ENOMEM;
218
219         ut_assertok(fdt_check_header(fdt_base));
220         ut_assertok(fdt_check_header(fdt_overlay));
221
222         fdt_base_copy = malloc(FDT_COPY_SIZE);
223         if (!fdt_base_copy)
224                 return -ENOMEM;
225         uts->priv = fdt_base_copy;
226
227         fdt_overlay_copy = malloc(FDT_COPY_SIZE);
228         if (!fdt_overlay_copy)
229                 return -ENOMEM;
230
231         /*
232          * Resize the FDT to 4k so that we have room to operate on
233          *
234          * (and relocate it since the memory might be mapped
235          * read-only)
236          */
237         ut_assertok(fdt_open_into(fdt_base, fdt_base_copy, FDT_COPY_SIZE));
238
239         /*
240          * Resize the overlay to 4k so that we have room to operate on
241          *
242          * (and relocate it since the memory might be mapped
243          * read-only)
244          */
245         ut_assertok(fdt_open_into(fdt_overlay, fdt_overlay_copy,
246                                   FDT_COPY_SIZE));
247
248         /* Apply the overlay */
249         ut_assertok(fdt_overlay_apply(fdt_base_copy, fdt_overlay_copy));
250
251         if (argc == 1)
252                 printf("Running %d environment tests\n", n_ents);
253
254         for (test = tests; test < tests + n_ents; test++) {
255                 if (argc > 1 && strcmp(argv[1], test->name))
256                         continue;
257                 printf("Test: %s\n", test->name);
258
259                 uts->start = mallinfo();
260
261                 test->func(uts);
262         }
263
264         printf("Failures: %d\n", uts->fail_count);
265
266         free(fdt_overlay_copy);
267         free(fdt_base_copy);
268         free(uts);
269
270         return uts->fail_count ? CMD_RET_FAILURE : 0;
271 }