Merge tag 'mac80211-for-davem-2018-09-27' of git://git.kernel.org/pub/scm/linux/kerne...
[linux-2.6-microblaze.git] / lib / test_bitmap.c
1 /*
2  * Test cases for printf facility.
3  */
4
5 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
6
7 #include <linux/bitmap.h>
8 #include <linux/init.h>
9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #include <linux/printk.h>
12 #include <linux/slab.h>
13 #include <linux/string.h>
14
15 static unsigned total_tests __initdata;
16 static unsigned failed_tests __initdata;
17
18 static char pbl_buffer[PAGE_SIZE] __initdata;
19
20
21 static bool __init
22 __check_eq_uint(const char *srcfile, unsigned int line,
23                 const unsigned int exp_uint, unsigned int x)
24 {
25         if (exp_uint != x) {
26                 pr_err("[%s:%u] expected %u, got %u\n",
27                         srcfile, line, exp_uint, x);
28                 return false;
29         }
30         return true;
31 }
32
33
34 static bool __init
35 __check_eq_bitmap(const char *srcfile, unsigned int line,
36                   const unsigned long *exp_bmap, const unsigned long *bmap,
37                   unsigned int nbits)
38 {
39         if (!bitmap_equal(exp_bmap, bmap, nbits)) {
40                 pr_warn("[%s:%u] bitmaps contents differ: expected \"%*pbl\", got \"%*pbl\"\n",
41                         srcfile, line,
42                         nbits, exp_bmap, nbits, bmap);
43                 return false;
44         }
45         return true;
46 }
47
48 static bool __init
49 __check_eq_pbl(const char *srcfile, unsigned int line,
50                const char *expected_pbl,
51                const unsigned long *bitmap, unsigned int nbits)
52 {
53         snprintf(pbl_buffer, sizeof(pbl_buffer), "%*pbl", nbits, bitmap);
54         if (strcmp(expected_pbl, pbl_buffer)) {
55                 pr_warn("[%s:%u] expected \"%s\", got \"%s\"\n",
56                         srcfile, line,
57                         expected_pbl, pbl_buffer);
58                 return false;
59         }
60         return true;
61 }
62
63 static bool __init
64 __check_eq_u32_array(const char *srcfile, unsigned int line,
65                      const u32 *exp_arr, unsigned int exp_len,
66                      const u32 *arr, unsigned int len) __used;
67 static bool __init
68 __check_eq_u32_array(const char *srcfile, unsigned int line,
69                      const u32 *exp_arr, unsigned int exp_len,
70                      const u32 *arr, unsigned int len)
71 {
72         if (exp_len != len) {
73                 pr_warn("[%s:%u] array length differ: expected %u, got %u\n",
74                         srcfile, line,
75                         exp_len, len);
76                 return false;
77         }
78
79         if (memcmp(exp_arr, arr, len*sizeof(*arr))) {
80                 pr_warn("[%s:%u] array contents differ\n", srcfile, line);
81                 print_hex_dump(KERN_WARNING, "  exp:  ", DUMP_PREFIX_OFFSET,
82                                32, 4, exp_arr, exp_len*sizeof(*exp_arr), false);
83                 print_hex_dump(KERN_WARNING, "  got:  ", DUMP_PREFIX_OFFSET,
84                                32, 4, arr, len*sizeof(*arr), false);
85                 return false;
86         }
87
88         return true;
89 }
90
91 #define __expect_eq(suffix, ...)                                        \
92         ({                                                              \
93                 int result = 0;                                         \
94                 total_tests++;                                          \
95                 if (!__check_eq_ ## suffix(__FILE__, __LINE__,          \
96                                            ##__VA_ARGS__)) {            \
97                         failed_tests++;                                 \
98                         result = 1;                                     \
99                 }                                                       \
100                 result;                                                 \
101         })
102
103 #define expect_eq_uint(...)             __expect_eq(uint, ##__VA_ARGS__)
104 #define expect_eq_bitmap(...)           __expect_eq(bitmap, ##__VA_ARGS__)
105 #define expect_eq_pbl(...)              __expect_eq(pbl, ##__VA_ARGS__)
106 #define expect_eq_u32_array(...)        __expect_eq(u32_array, ##__VA_ARGS__)
107
108 static void __init test_zero_clear(void)
109 {
110         DECLARE_BITMAP(bmap, 1024);
111
112         /* Known way to set all bits */
113         memset(bmap, 0xff, 128);
114
115         expect_eq_pbl("0-22", bmap, 23);
116         expect_eq_pbl("0-1023", bmap, 1024);
117
118         /* single-word bitmaps */
119         bitmap_clear(bmap, 0, 9);
120         expect_eq_pbl("9-1023", bmap, 1024);
121
122         bitmap_zero(bmap, 35);
123         expect_eq_pbl("64-1023", bmap, 1024);
124
125         /* cross boundaries operations */
126         bitmap_clear(bmap, 79, 19);
127         expect_eq_pbl("64-78,98-1023", bmap, 1024);
128
129         bitmap_zero(bmap, 115);
130         expect_eq_pbl("128-1023", bmap, 1024);
131
132         /* Zeroing entire area */
133         bitmap_zero(bmap, 1024);
134         expect_eq_pbl("", bmap, 1024);
135 }
136
137 static void __init test_fill_set(void)
138 {
139         DECLARE_BITMAP(bmap, 1024);
140
141         /* Known way to clear all bits */
142         memset(bmap, 0x00, 128);
143
144         expect_eq_pbl("", bmap, 23);
145         expect_eq_pbl("", bmap, 1024);
146
147         /* single-word bitmaps */
148         bitmap_set(bmap, 0, 9);
149         expect_eq_pbl("0-8", bmap, 1024);
150
151         bitmap_fill(bmap, 35);
152         expect_eq_pbl("0-63", bmap, 1024);
153
154         /* cross boundaries operations */
155         bitmap_set(bmap, 79, 19);
156         expect_eq_pbl("0-63,79-97", bmap, 1024);
157
158         bitmap_fill(bmap, 115);
159         expect_eq_pbl("0-127", bmap, 1024);
160
161         /* Zeroing entire area */
162         bitmap_fill(bmap, 1024);
163         expect_eq_pbl("0-1023", bmap, 1024);
164 }
165
166 static void __init test_copy(void)
167 {
168         DECLARE_BITMAP(bmap1, 1024);
169         DECLARE_BITMAP(bmap2, 1024);
170
171         bitmap_zero(bmap1, 1024);
172         bitmap_zero(bmap2, 1024);
173
174         /* single-word bitmaps */
175         bitmap_set(bmap1, 0, 19);
176         bitmap_copy(bmap2, bmap1, 23);
177         expect_eq_pbl("0-18", bmap2, 1024);
178
179         bitmap_set(bmap2, 0, 23);
180         bitmap_copy(bmap2, bmap1, 23);
181         expect_eq_pbl("0-18", bmap2, 1024);
182
183         /* multi-word bitmaps */
184         bitmap_set(bmap1, 0, 109);
185         bitmap_copy(bmap2, bmap1, 1024);
186         expect_eq_pbl("0-108", bmap2, 1024);
187
188         bitmap_fill(bmap2, 1024);
189         bitmap_copy(bmap2, bmap1, 1024);
190         expect_eq_pbl("0-108", bmap2, 1024);
191
192         /* the following tests assume a 32- or 64-bit arch (even 128b
193          * if we care)
194          */
195
196         bitmap_fill(bmap2, 1024);
197         bitmap_copy(bmap2, bmap1, 109);  /* ... but 0-padded til word length */
198         expect_eq_pbl("0-108,128-1023", bmap2, 1024);
199
200         bitmap_fill(bmap2, 1024);
201         bitmap_copy(bmap2, bmap1, 97);  /* ... but aligned on word length */
202         expect_eq_pbl("0-108,128-1023", bmap2, 1024);
203 }
204
205 #define PARSE_TIME 0x1
206
207 struct test_bitmap_parselist{
208         const int errno;
209         const char *in;
210         const unsigned long *expected;
211         const int nbits;
212         const int flags;
213 };
214
215 static const unsigned long exp[] __initconst = {
216         BITMAP_FROM_U64(1),
217         BITMAP_FROM_U64(2),
218         BITMAP_FROM_U64(0x0000ffff),
219         BITMAP_FROM_U64(0xffff0000),
220         BITMAP_FROM_U64(0x55555555),
221         BITMAP_FROM_U64(0xaaaaaaaa),
222         BITMAP_FROM_U64(0x11111111),
223         BITMAP_FROM_U64(0x22222222),
224         BITMAP_FROM_U64(0xffffffff),
225         BITMAP_FROM_U64(0xfffffffe),
226         BITMAP_FROM_U64(0x3333333311111111ULL),
227         BITMAP_FROM_U64(0xffffffff77777777ULL)
228 };
229
230 static const unsigned long exp2[] __initconst = {
231         BITMAP_FROM_U64(0x3333333311111111ULL),
232         BITMAP_FROM_U64(0xffffffff77777777ULL)
233 };
234
235 static const struct test_bitmap_parselist parselist_tests[] __initconst = {
236 #define step (sizeof(u64) / sizeof(unsigned long))
237
238         {0, "0",                        &exp[0], 8, 0},
239         {0, "1",                        &exp[1 * step], 8, 0},
240         {0, "0-15",                     &exp[2 * step], 32, 0},
241         {0, "16-31",                    &exp[3 * step], 32, 0},
242         {0, "0-31:1/2",                 &exp[4 * step], 32, 0},
243         {0, "1-31:1/2",                 &exp[5 * step], 32, 0},
244         {0, "0-31:1/4",                 &exp[6 * step], 32, 0},
245         {0, "1-31:1/4",                 &exp[7 * step], 32, 0},
246         {0, "0-31:4/4",                 &exp[8 * step], 32, 0},
247         {0, "1-31:4/4",                 &exp[9 * step], 32, 0},
248         {0, "0-31:1/4,32-63:2/4",       &exp[10 * step], 64, 0},
249         {0, "0-31:3/4,32-63:4/4",       &exp[11 * step], 64, 0},
250
251         {0, "0-31:1/4,32-63:2/4,64-95:3/4,96-127:4/4",  exp2, 128, 0},
252
253         {0, "0-2047:128/256", NULL, 2048, PARSE_TIME},
254
255         {-EINVAL, "-1", NULL, 8, 0},
256         {-EINVAL, "-0", NULL, 8, 0},
257         {-EINVAL, "10-1", NULL, 8, 0},
258         {-EINVAL, "0-31:", NULL, 8, 0},
259         {-EINVAL, "0-31:0", NULL, 8, 0},
260         {-EINVAL, "0-31:0/0", NULL, 8, 0},
261         {-EINVAL, "0-31:1/0", NULL, 8, 0},
262         {-EINVAL, "0-31:10/1", NULL, 8, 0},
263 };
264
265 static void __init test_bitmap_parselist(void)
266 {
267         int i;
268         int err;
269         cycles_t cycles;
270         DECLARE_BITMAP(bmap, 2048);
271
272         for (i = 0; i < ARRAY_SIZE(parselist_tests); i++) {
273 #define ptest parselist_tests[i]
274
275                 cycles = get_cycles();
276                 err = bitmap_parselist(ptest.in, bmap, ptest.nbits);
277                 cycles = get_cycles() - cycles;
278
279                 if (err != ptest.errno) {
280                         pr_err("test %d: input is %s, errno is %d, expected %d\n",
281                                         i, ptest.in, err, ptest.errno);
282                         continue;
283                 }
284
285                 if (!err && ptest.expected
286                          && !__bitmap_equal(bmap, ptest.expected, ptest.nbits)) {
287                         pr_err("test %d: input is %s, result is 0x%lx, expected 0x%lx\n",
288                                         i, ptest.in, bmap[0], *ptest.expected);
289                         continue;
290                 }
291
292                 if (ptest.flags & PARSE_TIME)
293                         pr_err("test %d: input is '%s' OK, Time: %llu\n",
294                                         i, ptest.in,
295                                         (unsigned long long)cycles);
296         }
297 }
298
299 #define EXP_BYTES       (sizeof(exp) * 8)
300
301 static void __init test_bitmap_arr32(void)
302 {
303         unsigned int nbits, next_bit;
304         u32 arr[sizeof(exp) / 4];
305         DECLARE_BITMAP(bmap2, EXP_BYTES);
306
307         memset(arr, 0xa5, sizeof(arr));
308
309         for (nbits = 0; nbits < EXP_BYTES; ++nbits) {
310                 bitmap_to_arr32(arr, exp, nbits);
311                 bitmap_from_arr32(bmap2, arr, nbits);
312                 expect_eq_bitmap(bmap2, exp, nbits);
313
314                 next_bit = find_next_bit(bmap2,
315                                 round_up(nbits, BITS_PER_LONG), nbits);
316                 if (next_bit < round_up(nbits, BITS_PER_LONG))
317                         pr_err("bitmap_copy_arr32(nbits == %d:"
318                                 " tail is not safely cleared: %d\n",
319                                 nbits, next_bit);
320
321                 if (nbits < EXP_BYTES - 32)
322                         expect_eq_uint(arr[DIV_ROUND_UP(nbits, 32)],
323                                                                 0xa5a5a5a5);
324         }
325 }
326
327 static void noinline __init test_mem_optimisations(void)
328 {
329         DECLARE_BITMAP(bmap1, 1024);
330         DECLARE_BITMAP(bmap2, 1024);
331         unsigned int start, nbits;
332
333         for (start = 0; start < 1024; start += 8) {
334                 for (nbits = 0; nbits < 1024 - start; nbits += 8) {
335                         memset(bmap1, 0x5a, sizeof(bmap1));
336                         memset(bmap2, 0x5a, sizeof(bmap2));
337
338                         bitmap_set(bmap1, start, nbits);
339                         __bitmap_set(bmap2, start, nbits);
340                         if (!bitmap_equal(bmap1, bmap2, 1024)) {
341                                 printk("set not equal %d %d\n", start, nbits);
342                                 failed_tests++;
343                         }
344                         if (!__bitmap_equal(bmap1, bmap2, 1024)) {
345                                 printk("set not __equal %d %d\n", start, nbits);
346                                 failed_tests++;
347                         }
348
349                         bitmap_clear(bmap1, start, nbits);
350                         __bitmap_clear(bmap2, start, nbits);
351                         if (!bitmap_equal(bmap1, bmap2, 1024)) {
352                                 printk("clear not equal %d %d\n", start, nbits);
353                                 failed_tests++;
354                         }
355                         if (!__bitmap_equal(bmap1, bmap2, 1024)) {
356                                 printk("clear not __equal %d %d\n", start,
357                                                                         nbits);
358                                 failed_tests++;
359                         }
360                 }
361         }
362 }
363
364 static int __init test_bitmap_init(void)
365 {
366         test_zero_clear();
367         test_fill_set();
368         test_copy();
369         test_bitmap_arr32();
370         test_bitmap_parselist();
371         test_mem_optimisations();
372
373         if (failed_tests == 0)
374                 pr_info("all %u tests passed\n", total_tests);
375         else
376                 pr_warn("failed %u out of %u tests\n",
377                         failed_tests, total_tests);
378
379         return failed_tests ? -EINVAL : 0;
380 }
381
382 static void __exit test_bitmap_cleanup(void)
383 {
384 }
385
386 module_init(test_bitmap_init);
387 module_exit(test_bitmap_cleanup);
388
389 MODULE_AUTHOR("david decotigny <david.decotigny@googlers.com>");
390 MODULE_LICENSE("GPL");