1 /*
2  * Copyright © 2016 Intel Corporation
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21  * IN THE SOFTWARE.
22  */
23 
24 #include <linux/random.h>
25 
26 #include "gt/intel_gt_pm.h"
27 #include "i915_drv.h"
28 #include "i915_selftest.h"
29 
30 #include "igt_flush_test.h"
31 
32 struct i915_selftest i915_selftest __read_mostly = {
33 	.timeout_ms = 500,
34 };
35 
36 int i915_mock_sanitycheck(void)
37 {
38 	pr_info(DRIVER_NAME ": %s() - ok!\n", __func__);
39 	return 0;
40 }
41 
42 int i915_live_sanitycheck(struct drm_i915_private *i915)
43 {
44 	pr_info("%s: %s() - ok!\n", i915->drm.driver->name, __func__);
45 	return 0;
46 }
47 
48 enum {
49 #define selftest(name, func) mock_##name,
50 #include "i915_mock_selftests.h"
51 #undef selftest
52 };
53 
54 enum {
55 #define selftest(name, func) live_##name,
56 #include "i915_live_selftests.h"
57 #undef selftest
58 };
59 
60 enum {
61 #define selftest(name, func) perf_##name,
62 #include "i915_perf_selftests.h"
63 #undef selftest
64 };
65 
66 struct selftest {
67 	bool enabled;
68 	const char *name;
69 	union {
70 		int (*mock)(void);
71 		int (*live)(struct drm_i915_private *);
72 	};
73 };
74 
75 #define selftest(n, f) [mock_##n] = { .name = #n, { .mock = f } },
76 static struct selftest mock_selftests[] = {
77 #include "i915_mock_selftests.h"
78 };
79 #undef selftest
80 
81 #define selftest(n, f) [live_##n] = { .name = #n, { .live = f } },
82 static struct selftest live_selftests[] = {
83 #include "i915_live_selftests.h"
84 };
85 #undef selftest
86 
87 #define selftest(n, f) [perf_##n] = { .name = #n, { .live = f } },
88 static struct selftest perf_selftests[] = {
89 #include "i915_perf_selftests.h"
90 };
91 #undef selftest
92 
93 /* Embed the line number into the parameter name so that we can order tests */
94 #define selftest(n, func) selftest_0(n, func, param(n))
95 #define param(n) __PASTE(igt__, __PASTE(__LINE__, __mock_##n))
96 #define selftest_0(n, func, id) \
97 module_param_named(id, mock_selftests[mock_##n].enabled, bool, 0400);
98 #include "i915_mock_selftests.h"
99 #undef selftest_0
100 #undef param
101 
102 #define param(n) __PASTE(igt__, __PASTE(__LINE__, __live_##n))
103 #define selftest_0(n, func, id) \
104 module_param_named(id, live_selftests[live_##n].enabled, bool, 0400);
105 #include "i915_live_selftests.h"
106 #undef selftest_0
107 #undef param
108 
109 #define param(n) __PASTE(igt__, __PASTE(__LINE__, __perf_##n))
110 #define selftest_0(n, func, id) \
111 module_param_named(id, perf_selftests[perf_##n].enabled, bool, 0400);
112 #include "i915_perf_selftests.h"
113 #undef selftest_0
114 #undef param
115 #undef selftest
116 
117 static void set_default_test_all(struct selftest *st, unsigned int count)
118 {
119 	unsigned int i;
120 
121 	for (i = 0; i < count; i++)
122 		if (st[i].enabled)
123 			return;
124 
125 	for (i = 0; i < count; i++)
126 		st[i].enabled = true;
127 }
128 
129 static int __run_selftests(const char *name,
130 			   struct selftest *st,
131 			   unsigned int count,
132 			   void *data)
133 {
134 	int err = 0;
135 
136 	while (!i915_selftest.random_seed)
137 		i915_selftest.random_seed = get_random_int();
138 
139 	i915_selftest.timeout_jiffies =
140 		i915_selftest.timeout_ms ?
141 		msecs_to_jiffies_timeout(i915_selftest.timeout_ms) :
142 		MAX_SCHEDULE_TIMEOUT;
143 
144 	set_default_test_all(st, count);
145 
146 	pr_info(DRIVER_NAME ": Performing %s selftests with st_random_seed=0x%x st_timeout=%u\n",
147 		name, i915_selftest.random_seed, i915_selftest.timeout_ms);
148 
149 	/* Tests are listed in order in i915_*_selftests.h */
150 	for (; count--; st++) {
151 		if (!st->enabled)
152 			continue;
153 
154 		cond_resched();
155 		if (signal_pending(current))
156 			return -EINTR;
157 
158 		pr_info(DRIVER_NAME ": Running %s\n", st->name);
159 		if (data)
160 			err = st->live(data);
161 		else
162 			err = st->mock();
163 		if (err == -EINTR && !signal_pending(current))
164 			err = 0;
165 		if (err)
166 			break;
167 	}
168 
169 	if (WARN(err > 0 || err == -ENOTTY,
170 		 "%s returned %d, conflicting with selftest's magic values!\n",
171 		 st->name, err))
172 		err = -1;
173 
174 	return err;
175 }
176 
177 #define run_selftests(x, data) \
178 	__run_selftests(#x, x##_selftests, ARRAY_SIZE(x##_selftests), data)
179 
180 int i915_mock_selftests(void)
181 {
182 	int err;
183 
184 	if (!i915_selftest.mock)
185 		return 0;
186 
187 	err = run_selftests(mock, NULL);
188 	if (err) {
189 		i915_selftest.mock = err;
190 		return err;
191 	}
192 
193 	if (i915_selftest.mock < 0) {
194 		i915_selftest.mock = -ENOTTY;
195 		return 1;
196 	}
197 
198 	return 0;
199 }
200 
201 int i915_live_selftests(struct pci_dev *pdev)
202 {
203 	int err;
204 
205 	if (!i915_selftest.live)
206 		return 0;
207 
208 	err = run_selftests(live, pdev_to_i915(pdev));
209 	if (err) {
210 		i915_selftest.live = err;
211 		return err;
212 	}
213 
214 	if (i915_selftest.live < 0) {
215 		i915_selftest.live = -ENOTTY;
216 		return 1;
217 	}
218 
219 	return 0;
220 }
221 
222 int i915_perf_selftests(struct pci_dev *pdev)
223 {
224 	int err;
225 
226 	if (!i915_selftest.perf)
227 		return 0;
228 
229 	err = run_selftests(perf, pdev_to_i915(pdev));
230 	if (err) {
231 		i915_selftest.perf = err;
232 		return err;
233 	}
234 
235 	if (i915_selftest.perf < 0) {
236 		i915_selftest.perf = -ENOTTY;
237 		return 1;
238 	}
239 
240 	return 0;
241 }
242 
243 static bool apply_subtest_filter(const char *caller, const char *name)
244 {
245 	char *filter, *sep, *tok;
246 	bool result = true;
247 
248 	filter = kstrdup(i915_selftest.filter, GFP_KERNEL);
249 	for (sep = filter; (tok = strsep(&sep, ","));) {
250 		bool allow = true;
251 		char *sl;
252 
253 		if (*tok == '!') {
254 			allow = false;
255 			tok++;
256 		}
257 
258 		if (*tok == '\0')
259 			continue;
260 
261 		sl = strchr(tok, '/');
262 		if (sl) {
263 			*sl++ = '\0';
264 			if (strcmp(tok, caller)) {
265 				if (allow)
266 					result = false;
267 				continue;
268 			}
269 			tok = sl;
270 		}
271 
272 		if (strcmp(tok, name)) {
273 			if (allow)
274 				result = false;
275 			continue;
276 		}
277 
278 		result = allow;
279 		break;
280 	}
281 	kfree(filter);
282 
283 	return result;
284 }
285 
286 int __i915_nop_setup(void *data)
287 {
288 	return 0;
289 }
290 
291 int __i915_nop_teardown(int err, void *data)
292 {
293 	return err;
294 }
295 
296 int __i915_live_setup(void *data)
297 {
298 	struct drm_i915_private *i915 = data;
299 
300 	/* The selftests expect an idle system */
301 	if (intel_gt_pm_wait_for_idle(&i915->gt))
302 		return -EIO;
303 
304 	return intel_gt_terminally_wedged(&i915->gt);
305 }
306 
307 int __i915_live_teardown(int err, void *data)
308 {
309 	struct drm_i915_private *i915 = data;
310 
311 	if (igt_flush_test(i915))
312 		err = -EIO;
313 
314 	i915_gem_drain_freed_objects(i915);
315 
316 	return err;
317 }
318 
319 int __intel_gt_live_setup(void *data)
320 {
321 	struct intel_gt *gt = data;
322 
323 	/* The selftests expect an idle system */
324 	if (intel_gt_pm_wait_for_idle(gt))
325 		return -EIO;
326 
327 	return intel_gt_terminally_wedged(gt);
328 }
329 
330 int __intel_gt_live_teardown(int err, void *data)
331 {
332 	struct intel_gt *gt = data;
333 
334 	if (igt_flush_test(gt->i915))
335 		err = -EIO;
336 
337 	i915_gem_drain_freed_objects(gt->i915);
338 
339 	return err;
340 }
341 
342 int __i915_subtests(const char *caller,
343 		    int (*setup)(void *data),
344 		    int (*teardown)(int err, void *data),
345 		    const struct i915_subtest *st,
346 		    unsigned int count,
347 		    void *data)
348 {
349 	int err;
350 
351 	for (; count--; st++) {
352 		cond_resched();
353 		if (signal_pending(current))
354 			return -EINTR;
355 
356 		if (!apply_subtest_filter(caller, st->name))
357 			continue;
358 
359 		err = setup(data);
360 		if (err) {
361 			pr_err(DRIVER_NAME "/%s: setup failed for %s\n",
362 			       caller, st->name);
363 			return err;
364 		}
365 
366 		pr_info(DRIVER_NAME ": Running %s/%s\n", caller, st->name);
367 		GEM_TRACE("Running %s/%s\n", caller, st->name);
368 
369 		err = teardown(st->func(data), data);
370 		if (err && err != -EINTR) {
371 			pr_err(DRIVER_NAME "/%s: %s failed with error %d\n",
372 			       caller, st->name, err);
373 			return err;
374 		}
375 	}
376 
377 	return 0;
378 }
379 
380 bool __igt_timeout(unsigned long timeout, const char *fmt, ...)
381 {
382 	va_list va;
383 
384 	if (!signal_pending(current)) {
385 		cond_resched();
386 		if (time_before(jiffies, timeout))
387 			return false;
388 	}
389 
390 	if (fmt) {
391 		va_start(va, fmt);
392 		vprintk(fmt, va);
393 		va_end(va);
394 	}
395 
396 	return true;
397 }
398 
399 void igt_hexdump(const void *buf, size_t len)
400 {
401 	const size_t rowsize = 8 * sizeof(u32);
402 	const void *prev = NULL;
403 	bool skip = false;
404 	size_t pos;
405 
406 	for (pos = 0; pos < len; pos += rowsize) {
407 		char line[128];
408 
409 		if (prev && !memcmp(prev, buf + pos, rowsize)) {
410 			if (!skip) {
411 				pr_info("*\n");
412 				skip = true;
413 			}
414 			continue;
415 		}
416 
417 		WARN_ON_ONCE(hex_dump_to_buffer(buf + pos, len - pos,
418 						rowsize, sizeof(u32),
419 						line, sizeof(line),
420 						false) >= sizeof(line));
421 		pr_info("[%04zx] %s\n", pos, line);
422 
423 		prev = buf + pos;
424 		skip = false;
425 	}
426 }
427 
428 module_param_named(st_random_seed, i915_selftest.random_seed, uint, 0400);
429 module_param_named(st_timeout, i915_selftest.timeout_ms, uint, 0400);
430 module_param_named(st_filter, i915_selftest.filter, charp, 0400);
431 
432 module_param_named_unsafe(mock_selftests, i915_selftest.mock, int, 0400);
433 MODULE_PARM_DESC(mock_selftests, "Run selftests before loading, using mock hardware (0:disabled [default], 1:run tests then load driver, -1:run tests then exit module)");
434 
435 module_param_named_unsafe(live_selftests, i915_selftest.live, int, 0400);
436 MODULE_PARM_DESC(live_selftests, "Run selftests after driver initialisation on the live system (0:disabled [default], 1:run tests then continue, -1:run tests then exit module)");
437 
438 module_param_named_unsafe(perf_selftests, i915_selftest.perf, int, 0400);
439 MODULE_PARM_DESC(perf_selftests, "Run performance orientated selftests after driver initialisation on the live system (0:disabled [default], 1:run tests then continue, -1:run tests then exit module)");
440