summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/xe/tests/xe_migrate.c
blob: a6523df0f1d39fbe7f0354d404f95886a3d56424 (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
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
// SPDX-License-Identifier: MIT
/*
 * Copyright © 2020-2022 Intel Corporation
 */

#include <kunit/test.h>
#include <kunit/visibility.h>

#include "tests/xe_migrate_test.h"
#include "tests/xe_pci_test.h"

#include "xe_pci.h"

static bool sanity_fence_failed(struct xe_device *xe, struct dma_fence *fence,
				const char *str, struct kunit *test)
{
	long ret;

	if (IS_ERR(fence)) {
		KUNIT_FAIL(test, "Failed to create fence for %s: %li\n", str,
			   PTR_ERR(fence));
		return true;
	}
	if (!fence)
		return true;

	ret = dma_fence_wait_timeout(fence, false, 5 * HZ);
	if (ret <= 0) {
		KUNIT_FAIL(test, "Fence timed out for %s: %li\n", str, ret);
		return true;
	}

	return false;
}

static int run_sanity_job(struct xe_migrate *m, struct xe_device *xe,
			  struct xe_bb *bb, u32 second_idx, const char *str,
			  struct kunit *test)
{
	u64 batch_base = xe_migrate_batch_base(m, xe->info.has_usm);
	struct xe_sched_job *job = xe_bb_create_migration_job(m->q, bb,
							      batch_base,
							      second_idx);
	struct dma_fence *fence;

	if (IS_ERR(job)) {
		KUNIT_FAIL(test, "Failed to allocate fake pt: %li\n",
			   PTR_ERR(job));
		return PTR_ERR(job);
	}

	xe_sched_job_arm(job);
	fence = dma_fence_get(&job->drm.s_fence->finished);
	xe_sched_job_push(job);

	if (sanity_fence_failed(xe, fence, str, test))
		return -ETIMEDOUT;

	dma_fence_put(fence);
	kunit_info(test, "%s: Job completed\n", str);
	return 0;
}

static void
sanity_populate_cb(struct xe_migrate_pt_update *pt_update,
		   struct xe_tile *tile, struct iosys_map *map, void *dst,
		   u32 qword_ofs, u32 num_qwords,
		   const struct xe_vm_pgtable_update *update)
{
	struct migrate_test_params *p =
		to_migrate_test_params(xe_cur_kunit_priv(XE_TEST_LIVE_MIGRATE));
	int i;
	u64 *ptr = dst;
	u64 value;

	for (i = 0; i < num_qwords; i++) {
		value = (qword_ofs + i - update->ofs) * 0x1111111111111111ULL;
		if (map)
			xe_map_wr(tile_to_xe(tile), map, (qword_ofs + i) *
				  sizeof(u64), u64, value);
		else
			ptr[i] = value;
	}

	kunit_info(xe_cur_kunit(), "Used %s.\n", map ? "CPU" : "GPU");
	if (p->force_gpu && map)
		KUNIT_FAIL(xe_cur_kunit(), "GPU pagetable update used CPU.\n");
}

static const struct xe_migrate_pt_update_ops sanity_ops = {
	.populate = sanity_populate_cb,
};

#define check(_retval, _expected, str, _test)				\
	do { if ((_retval) != (_expected)) {				\
			KUNIT_FAIL(_test, "Sanity check failed: " str	\
				   " expected %llx, got %llx\n",	\
				   (u64)(_expected), (u64)(_retval));	\
		} } while (0)

static void test_copy(struct xe_migrate *m, struct xe_bo *bo,
		      struct kunit *test, u32 region)
{
	struct xe_device *xe = tile_to_xe(m->tile);
	u64 retval, expected = 0;
	bool big = bo->size >= SZ_2M;
	struct dma_fence *fence;
	const char *str = big ? "Copying big bo" : "Copying small bo";
	int err;

	struct xe_bo *remote = xe_bo_create_locked(xe, m->tile, NULL,
						   bo->size,
						   ttm_bo_type_kernel,
						   region |
						   XE_BO_NEEDS_CPU_ACCESS);
	if (IS_ERR(remote)) {
		KUNIT_FAIL(test, "Failed to allocate remote bo for %s: %li\n",
			   str, PTR_ERR(remote));
		return;
	}

	err = xe_bo_validate(remote, NULL, false);
	if (err) {
		KUNIT_FAIL(test, "Failed to validate system bo for %s: %li\n",
			   str, err);
		goto out_unlock;
	}

	err = xe_bo_vmap(remote);
	if (err) {
		KUNIT_FAIL(test, "Failed to vmap system bo for %s: %li\n",
			   str, err);
		goto out_unlock;
	}

	xe_map_memset(xe, &remote->vmap, 0, 0xd0, remote->size);
	fence = xe_migrate_clear(m, remote, remote->ttm.resource);
	if (!sanity_fence_failed(xe, fence, big ? "Clearing remote big bo" :
				 "Clearing remote small bo", test)) {
		retval = xe_map_rd(xe, &remote->vmap, 0, u64);
		check(retval, expected, "remote first offset should be cleared",
		      test);
		retval = xe_map_rd(xe, &remote->vmap, remote->size - 8, u64);
		check(retval, expected, "remote last offset should be cleared",
		      test);
	}
	dma_fence_put(fence);

	/* Try to copy 0xc0 from remote to vram with 2MB or 64KiB/4KiB pages */
	xe_map_memset(xe, &remote->vmap, 0, 0xc0, remote->size);
	xe_map_memset(xe, &bo->vmap, 0, 0xd0, bo->size);

	expected = 0xc0c0c0c0c0c0c0c0;
	fence = xe_migrate_copy(m, remote, bo, remote->ttm.resource,
				bo->ttm.resource, false);
	if (!sanity_fence_failed(xe, fence, big ? "Copying big bo remote -> vram" :
				 "Copying small bo remote -> vram", test)) {
		retval = xe_map_rd(xe, &bo->vmap, 0, u64);
		check(retval, expected,
		      "remote -> vram bo first offset should be copied", test);
		retval = xe_map_rd(xe, &bo->vmap, bo->size - 8, u64);
		check(retval, expected,
		      "remote -> vram bo offset should be copied", test);
	}
	dma_fence_put(fence);

	/* And other way around.. slightly hacky.. */
	xe_map_memset(xe, &remote->vmap, 0, 0xd0, remote->size);
	xe_map_memset(xe, &bo->vmap, 0, 0xc0, bo->size);

	fence = xe_migrate_copy(m, bo, remote, bo->ttm.resource,
				remote->ttm.resource, false);
	if (!sanity_fence_failed(xe, fence, big ? "Copying big bo vram -> remote" :
				 "Copying small bo vram -> remote", test)) {
		retval = xe_map_rd(xe, &remote->vmap, 0, u64);
		check(retval, expected,
		      "vram -> remote bo first offset should be copied", test);
		retval = xe_map_rd(xe, &remote->vmap, bo->size - 8, u64);
		check(retval, expected,
		      "vram -> remote bo last offset should be copied", test);
	}
	dma_fence_put(fence);

	xe_bo_vunmap(remote);
out_unlock:
	xe_bo_unlock(remote);
	xe_bo_put(remote);
}

static void test_copy_sysmem(struct xe_migrate *m, struct xe_bo *bo,
			     struct kunit *test)
{
	test_copy(m, bo, test, XE_BO_CREATE_SYSTEM_BIT);
}

static void test_copy_vram(struct xe_migrate *m, struct xe_bo *bo,
			   struct kunit *test)
{
	u32 region;

	if (bo->ttm.resource->mem_type == XE_PL_SYSTEM)
		return;

	if (bo->ttm.resource->mem_type == XE_PL_VRAM0)
		region = XE_BO_CREATE_VRAM1_BIT;
	else
		region = XE_BO_CREATE_VRAM0_BIT;
	test_copy(m, bo, test, region);
}

static void test_pt_update(struct xe_migrate *m, struct xe_bo *pt,
			   struct kunit *test, bool force_gpu)
{
	struct xe_device *xe = tile_to_xe(m->tile);
	struct dma_fence *fence;
	u64 retval, expected;
	ktime_t then, now;
	int i;

	struct xe_vm_pgtable_update update = {
		.ofs = 1,
		.qwords = 0x10,
		.pt_bo = pt,
	};
	struct xe_migrate_pt_update pt_update = {
		.ops = &sanity_ops,
	};
	struct migrate_test_params p = {
		.base.id = XE_TEST_LIVE_MIGRATE,
		.force_gpu = force_gpu,
	};

	test->priv = &p;
	/* Test xe_migrate_update_pgtables() updates the pagetable as expected */
	expected = 0xf0f0f0f0f0f0f0f0ULL;
	xe_map_memset(xe, &pt->vmap, 0, (u8)expected, pt->size);

	then = ktime_get();
	fence = xe_migrate_update_pgtables(m, m->q->vm, NULL, m->q, &update, 1,
					   NULL, 0, &pt_update);
	now = ktime_get();
	if (sanity_fence_failed(xe, fence, "Migration pagetable update", test))
		return;

	kunit_info(test, "Updating without syncing took %llu us,\n",
		   (unsigned long long)ktime_to_us(ktime_sub(now, then)));

	dma_fence_put(fence);
	retval = xe_map_rd(xe, &pt->vmap, 0, u64);
	check(retval, expected, "PTE[0] must stay untouched", test);

	for (i = 0; i < update.qwords; i++) {
		retval = xe_map_rd(xe, &pt->vmap, (update.ofs + i) * 8, u64);
		check(retval, i * 0x1111111111111111ULL, "PTE update", test);
	}

	retval = xe_map_rd(xe, &pt->vmap, 8 * (update.ofs + update.qwords),
			   u64);
	check(retval, expected, "PTE[0x11] must stay untouched", test);
}

static void xe_migrate_sanity_test(struct xe_migrate *m, struct kunit *test)
{
	struct xe_tile *tile = m->tile;
	struct xe_device *xe = tile_to_xe(tile);
	struct xe_bo *pt, *bo = m->pt_bo, *big, *tiny;
	struct xe_res_cursor src_it;
	struct dma_fence *fence;
	u64 retval, expected;
	struct xe_bb *bb;
	int err;
	u8 id = tile->id;

	err = xe_bo_vmap(bo);
	if (err) {
		KUNIT_FAIL(test, "Failed to vmap our pagetables: %li\n",
			   PTR_ERR(bo));
		return;
	}

	big = xe_bo_create_pin_map(xe, tile, m->q->vm, SZ_4M,
				   ttm_bo_type_kernel,
				   XE_BO_CREATE_VRAM_IF_DGFX(tile) |
				   XE_BO_CREATE_PINNED_BIT);
	if (IS_ERR(big)) {
		KUNIT_FAIL(test, "Failed to allocate bo: %li\n", PTR_ERR(big));
		goto vunmap;
	}

	pt = xe_bo_create_pin_map(xe, tile, m->q->vm, XE_PAGE_SIZE,
				  ttm_bo_type_kernel,
				  XE_BO_CREATE_VRAM_IF_DGFX(tile) |
				  XE_BO_CREATE_PINNED_BIT);
	if (IS_ERR(pt)) {
		KUNIT_FAIL(test, "Failed to allocate fake pt: %li\n",
			   PTR_ERR(pt));
		goto free_big;
	}

	tiny = xe_bo_create_pin_map(xe, tile, m->q->vm,
				    2 * SZ_4K,
				    ttm_bo_type_kernel,
				    XE_BO_CREATE_VRAM_IF_DGFX(tile) |
				    XE_BO_CREATE_PINNED_BIT);
	if (IS_ERR(tiny)) {
		KUNIT_FAIL(test, "Failed to allocate fake pt: %li\n",
			   PTR_ERR(pt));
		goto free_pt;
	}

	bb = xe_bb_new(tile->primary_gt, 32, xe->info.has_usm);
	if (IS_ERR(bb)) {
		KUNIT_FAIL(test, "Failed to create batchbuffer: %li\n",
			   PTR_ERR(bb));
		goto free_tiny;
	}

	kunit_info(test, "Starting tests, top level PT addr: %lx, special pagetable base addr: %lx\n",
		   (unsigned long)xe_bo_main_addr(m->q->vm->pt_root[id]->bo, XE_PAGE_SIZE),
		   (unsigned long)xe_bo_main_addr(m->pt_bo, XE_PAGE_SIZE));

	/* First part of the test, are we updating our pagetable bo with a new entry? */
	xe_map_wr(xe, &bo->vmap, XE_PAGE_SIZE * (NUM_KERNEL_PDE - 1), u64,
		  0xdeaddeadbeefbeef);
	expected = m->q->vm->pt_ops->pte_encode_bo(pt, 0, xe->pat.idx[XE_CACHE_WB], 0);
	if (m->q->vm->flags & XE_VM_FLAG_64K)
		expected |= XE_PTE_PS64;
	if (xe_bo_is_vram(pt))
		xe_res_first(pt->ttm.resource, 0, pt->size, &src_it);
	else
		xe_res_first_sg(xe_bo_sg(pt), 0, pt->size, &src_it);

	emit_pte(m, bb, NUM_KERNEL_PDE - 1, xe_bo_is_vram(pt), false,
		 &src_it, XE_PAGE_SIZE, pt->ttm.resource);

	run_sanity_job(m, xe, bb, bb->len, "Writing PTE for our fake PT", test);

	retval = xe_map_rd(xe, &bo->vmap, XE_PAGE_SIZE * (NUM_KERNEL_PDE - 1),
			   u64);
	check(retval, expected, "PTE entry write", test);

	/* Now try to write data to our newly mapped 'pagetable', see if it succeeds */
	bb->len = 0;
	bb->cs[bb->len++] = MI_BATCH_BUFFER_END;
	xe_map_wr(xe, &pt->vmap, 0, u32, 0xdeaddead);
	expected = 0;

	emit_clear(tile->primary_gt, bb, xe_migrate_vm_addr(NUM_KERNEL_PDE - 1, 0), 4, 4,
		   IS_DGFX(xe));
	run_sanity_job(m, xe, bb, 1, "Writing to our newly mapped pagetable",
		       test);

	retval = xe_map_rd(xe, &pt->vmap, 0, u32);
	check(retval, expected, "Write to PT after adding PTE", test);

	/* Sanity checks passed, try the full ones! */

	/* Clear a small bo */
	kunit_info(test, "Clearing small buffer object\n");
	xe_map_memset(xe, &tiny->vmap, 0, 0x22, tiny->size);
	expected = 0;
	fence = xe_migrate_clear(m, tiny, tiny->ttm.resource);
	if (sanity_fence_failed(xe, fence, "Clearing small bo", test))
		goto out;

	dma_fence_put(fence);
	retval = xe_map_rd(xe, &tiny->vmap, 0, u32);
	check(retval, expected, "Command clear small first value", test);
	retval = xe_map_rd(xe, &tiny->vmap, tiny->size - 4, u32);
	check(retval, expected, "Command clear small last value", test);

	kunit_info(test, "Copying small buffer object to system\n");
	test_copy_sysmem(m, tiny, test);
	if (xe->info.tile_count > 1) {
		kunit_info(test, "Copying small buffer object to other vram\n");
		test_copy_vram(m, tiny, test);
	}

	/* Clear a big bo */
	kunit_info(test, "Clearing big buffer object\n");
	xe_map_memset(xe, &big->vmap, 0, 0x11, big->size);
	expected = 0;
	fence = xe_migrate_clear(m, big, big->ttm.resource);
	if (sanity_fence_failed(xe, fence, "Clearing big bo", test))
		goto out;

	dma_fence_put(fence);
	retval = xe_map_rd(xe, &big->vmap, 0, u32);
	check(retval, expected, "Command clear big first value", test);
	retval = xe_map_rd(xe, &big->vmap, big->size - 4, u32);
	check(retval, expected, "Command clear big last value", test);

	kunit_info(test, "Copying big buffer object to system\n");
	test_copy_sysmem(m, big, test);
	if (xe->info.tile_count > 1) {
		kunit_info(test, "Copying big buffer object to other vram\n");
		test_copy_vram(m, big, test);
	}

	kunit_info(test, "Testing page table update using CPU if GPU idle.\n");
	test_pt_update(m, pt, test, false);
	kunit_info(test, "Testing page table update using GPU\n");
	test_pt_update(m, pt, test, true);

out:
	xe_bb_free(bb, NULL);
free_tiny:
	xe_bo_unpin(tiny);
	xe_bo_put(tiny);
free_pt:
	xe_bo_unpin(pt);
	xe_bo_put(pt);
free_big:
	xe_bo_unpin(big);
	xe_bo_put(big);
vunmap:
	xe_bo_vunmap(m->pt_bo);
}

static int migrate_test_run_device(struct xe_device *xe)
{
	struct kunit *test = xe_cur_kunit();
	struct xe_tile *tile;
	int id;

	for_each_tile(tile, xe, id) {
		struct xe_migrate *m = tile->migrate;

		kunit_info(test, "Testing tile id %d.\n", id);
		xe_vm_lock(m->q->vm, true);
		xe_device_mem_access_get(xe);
		xe_migrate_sanity_test(m, test);
		xe_device_mem_access_put(xe);
		xe_vm_unlock(m->q->vm);
	}

	return 0;
}

void xe_migrate_sanity_kunit(struct kunit *test)
{
	xe_call_for_each_device(migrate_test_run_device);
}
EXPORT_SYMBOL_IF_KUNIT(xe_migrate_sanity_kunit);