1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (c) 2016 NextThing Co
4 * Copyright (c) 2016 Free Electrons
5 */
6
7 #include <common.h>
8 #include <command.h>
9 #include <errno.h>
10 #include <malloc.h>
11
12 #include <linux/sizes.h>
13
14 #include <test/ut.h>
15 #include <test/overlay.h>
16 #include <test/suites.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 extern u32 __dtb_test_fdt_overlay_stacked_begin;
24
ut_fdt_getprop_u32_by_index(void * fdt,const char * path,const char * name,int index,u32 * out)25 static int ut_fdt_getprop_u32_by_index(void *fdt, const char *path,
26 const char *name, int index,
27 u32 *out)
28 {
29 const fdt32_t *val;
30 int node_off;
31 int len;
32
33 node_off = fdt_path_offset(fdt, path);
34 if (node_off < 0)
35 return node_off;
36
37 val = fdt_getprop(fdt, node_off, name, &len);
38 if (!val || (len < (sizeof(uint32_t) * (index + 1))))
39 return -FDT_ERR_NOTFOUND;
40
41 *out = fdt32_to_cpu(*(val + index));
42
43 return 0;
44 }
45
ut_fdt_getprop_u32(void * fdt,const char * path,const char * name,u32 * out)46 static int ut_fdt_getprop_u32(void *fdt, const char *path, const char *name,
47 u32 *out)
48 {
49 return ut_fdt_getprop_u32_by_index(fdt, path, name, 0, out);
50 }
51
fdt_getprop_str(void * fdt,const char * path,const char * name,const char ** out)52 static int fdt_getprop_str(void *fdt, const char *path, const char *name,
53 const char **out)
54 {
55 int node_off;
56 int len;
57
58 node_off = fdt_path_offset(fdt, path);
59 if (node_off < 0)
60 return node_off;
61
62 *out = fdt_stringlist_get(fdt, node_off, name, 0, &len);
63
64 return len < 0 ? len : 0;
65 }
66
fdt_overlay_change_int_property(struct unit_test_state * uts)67 static int fdt_overlay_change_int_property(struct unit_test_state *uts)
68 {
69 void *fdt = uts->priv;
70 u32 val = 0;
71
72 ut_assertok(ut_fdt_getprop_u32(fdt, "/test-node", "test-int-property",
73 &val));
74 ut_asserteq(43, val);
75
76 return CMD_RET_SUCCESS;
77 }
78 OVERLAY_TEST(fdt_overlay_change_int_property, 0);
79
fdt_overlay_change_str_property(struct unit_test_state * uts)80 static int fdt_overlay_change_str_property(struct unit_test_state *uts)
81 {
82 void *fdt = uts->priv;
83 const char *val = NULL;
84
85 ut_assertok(fdt_getprop_str(fdt, "/test-node", "test-str-property",
86 &val));
87 ut_asserteq_str("foobar", val);
88
89 return CMD_RET_SUCCESS;
90 }
91 OVERLAY_TEST(fdt_overlay_change_str_property, 0);
92
fdt_overlay_add_str_property(struct unit_test_state * uts)93 static int fdt_overlay_add_str_property(struct unit_test_state *uts)
94 {
95 void *fdt = uts->priv;
96 const char *val = NULL;
97
98 ut_assertok(fdt_getprop_str(fdt, "/test-node", "test-str-property-2",
99 &val));
100 ut_asserteq_str("foobar2", val);
101
102 return CMD_RET_SUCCESS;
103 }
104 OVERLAY_TEST(fdt_overlay_add_str_property, 0);
105
fdt_overlay_add_node_by_phandle(struct unit_test_state * uts)106 static int fdt_overlay_add_node_by_phandle(struct unit_test_state *uts)
107 {
108 void *fdt = uts->priv;
109 int off;
110
111 off = fdt_path_offset(fdt, "/test-node/new-node");
112 ut_assert(off >= 0);
113
114 ut_assertnonnull(fdt_getprop(fdt, off, "new-property", NULL));
115
116 return CMD_RET_SUCCESS;
117 }
118 OVERLAY_TEST(fdt_overlay_add_node_by_phandle, 0);
119
fdt_overlay_add_node_by_path(struct unit_test_state * uts)120 static int fdt_overlay_add_node_by_path(struct unit_test_state *uts)
121 {
122 void *fdt = uts->priv;
123 int off;
124
125 off = fdt_path_offset(fdt, "/new-node");
126 ut_assert(off >= 0);
127
128 ut_assertnonnull(fdt_getprop(fdt, off, "new-property", NULL));
129
130 return CMD_RET_SUCCESS;
131 }
132 OVERLAY_TEST(fdt_overlay_add_node_by_path, 0);
133
fdt_overlay_add_subnode_property(struct unit_test_state * uts)134 static int fdt_overlay_add_subnode_property(struct unit_test_state *uts)
135 {
136 void *fdt = uts->priv;
137 int off;
138
139 off = fdt_path_offset(fdt, "/test-node/sub-test-node");
140 ut_assert(off >= 0);
141
142 ut_assertnonnull(fdt_getprop(fdt, off, "sub-test-property", NULL));
143 ut_assertnonnull(fdt_getprop(fdt, off, "new-sub-test-property", NULL));
144
145 return CMD_RET_SUCCESS;
146 }
147 OVERLAY_TEST(fdt_overlay_add_subnode_property, 0);
148
fdt_overlay_local_phandle(struct unit_test_state * uts)149 static int fdt_overlay_local_phandle(struct unit_test_state *uts)
150 {
151 uint32_t local_phandle;
152 void *fdt = uts->priv;
153 u32 val = 0;
154 int off;
155
156 off = fdt_path_offset(fdt, "/new-local-node");
157 ut_assert(off >= 0);
158
159 local_phandle = fdt_get_phandle(fdt, off);
160 ut_assert(local_phandle);
161
162 ut_assertok(ut_fdt_getprop_u32_by_index(fdt, "/", "test-several-phandle",
163 0, &val));
164 ut_asserteq(local_phandle, val);
165
166 ut_assertok(ut_fdt_getprop_u32_by_index(fdt, "/", "test-several-phandle",
167 1, &val));
168 ut_asserteq(local_phandle, val);
169
170 return CMD_RET_SUCCESS;
171 }
172 OVERLAY_TEST(fdt_overlay_local_phandle, 0);
173
fdt_overlay_local_phandles(struct unit_test_state * uts)174 static int fdt_overlay_local_phandles(struct unit_test_state *uts)
175 {
176 uint32_t local_phandle, test_phandle;
177 void *fdt = uts->priv;
178 u32 val = 0;
179 int off;
180
181 off = fdt_path_offset(fdt, "/new-local-node");
182 ut_assert(off >= 0);
183
184 local_phandle = fdt_get_phandle(fdt, off);
185 ut_assert(local_phandle);
186
187 off = fdt_path_offset(fdt, "/test-node");
188 ut_assert(off >= 0);
189
190 test_phandle = fdt_get_phandle(fdt, off);
191 ut_assert(test_phandle);
192
193 ut_assertok(ut_fdt_getprop_u32_by_index(fdt, "/", "test-phandle", 0,
194 &val));
195 ut_asserteq(test_phandle, val);
196
197 ut_assertok(ut_fdt_getprop_u32_by_index(fdt, "/", "test-phandle", 1,
198 &val));
199 ut_asserteq(local_phandle, val);
200
201 return CMD_RET_SUCCESS;
202 }
203 OVERLAY_TEST(fdt_overlay_local_phandles, 0);
204
fdt_overlay_stacked(struct unit_test_state * uts)205 static int fdt_overlay_stacked(struct unit_test_state *uts)
206 {
207 void *fdt = uts->priv;
208 u32 val = 0;
209
210 ut_assertok(ut_fdt_getprop_u32(fdt, "/new-local-node",
211 "stacked-test-int-property", &val));
212 ut_asserteq(43, val);
213
214 return CMD_RET_SUCCESS;
215 }
216 OVERLAY_TEST(fdt_overlay_stacked, 0);
217
do_ut_overlay(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])218 int do_ut_overlay(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
219 {
220 struct unit_test *tests = ll_entry_start(struct unit_test,
221 overlay_test);
222 const int n_ents = ll_entry_count(struct unit_test, overlay_test);
223 struct unit_test_state *uts;
224 void *fdt_base = &__dtb_test_fdt_base_begin;
225 void *fdt_overlay = &__dtb_test_fdt_overlay_begin;
226 void *fdt_overlay_stacked = &__dtb_test_fdt_overlay_stacked_begin;
227 void *fdt_base_copy, *fdt_overlay_copy, *fdt_overlay_stacked_copy;
228 int ret = -ENOMEM;
229
230 uts = calloc(1, sizeof(*uts));
231 if (!uts)
232 return -ENOMEM;
233
234 ut_assertok(fdt_check_header(fdt_base));
235 ut_assertok(fdt_check_header(fdt_overlay));
236
237 fdt_base_copy = malloc(FDT_COPY_SIZE);
238 if (!fdt_base_copy)
239 goto err1;
240 uts->priv = fdt_base_copy;
241
242 fdt_overlay_copy = malloc(FDT_COPY_SIZE);
243 if (!fdt_overlay_copy)
244 goto err2;
245
246 fdt_overlay_stacked_copy = malloc(FDT_COPY_SIZE);
247 if (!fdt_overlay_stacked_copy)
248 goto err3;
249
250 /*
251 * Resize the FDT to 4k so that we have room to operate on
252 *
253 * (and relocate it since the memory might be mapped
254 * read-only)
255 */
256 ut_assertok(fdt_open_into(fdt_base, fdt_base_copy, FDT_COPY_SIZE));
257
258 /*
259 * Resize the overlay to 4k so that we have room to operate on
260 *
261 * (and relocate it since the memory might be mapped
262 * read-only)
263 */
264 ut_assertok(fdt_open_into(fdt_overlay, fdt_overlay_copy,
265 FDT_COPY_SIZE));
266
267 /*
268 * Resize the stacked overlay to 4k so that we have room to operate on
269 *
270 * (and relocate it since the memory might be mapped
271 * read-only)
272 */
273 ut_assertok(fdt_open_into(fdt_overlay_stacked, fdt_overlay_stacked_copy,
274 FDT_COPY_SIZE));
275
276 /* Apply the overlay */
277 ut_assertok(fdt_overlay_apply(fdt_base_copy, fdt_overlay_copy));
278
279 /* Apply the stacked overlay */
280 ut_assertok(fdt_overlay_apply(fdt_base_copy, fdt_overlay_stacked_copy));
281
282 ret = cmd_ut_category("overlay", tests, n_ents, argc, argv);
283
284 free(fdt_overlay_stacked_copy);
285 err3:
286 free(fdt_overlay_copy);
287 err2:
288 free(fdt_base_copy);
289 err1:
290 free(uts);
291
292 return ret;
293 }
294