summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/xe/xe_query.c
blob: 28d9bb3b825de9f9b692e29125038874fb20155d (plain) (blame)
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
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
// SPDX-License-Identifier: MIT
/*
 * Copyright © 2022 Intel Corporation
 */

#include "xe_query.h"

#include <linux/nospec.h>
#include <linux/sched/clock.h>

#include <drm/ttm/ttm_placement.h>
#include <uapi/drm/xe_drm.h>

#include "regs/xe_engine_regs.h"
#include "regs/xe_gt_regs.h"
#include "xe_bo.h"
#include "xe_device.h"
#include "xe_exec_queue.h"
#include "xe_force_wake.h"
#include "xe_ggtt.h"
#include "xe_gt.h"
#include "xe_guc_hwconfig.h"
#include "xe_macros.h"
#include "xe_mmio.h"
#include "xe_ttm_vram_mgr.h"

static const u16 xe_to_user_engine_class[] = {
	[XE_ENGINE_CLASS_RENDER] = DRM_XE_ENGINE_CLASS_RENDER,
	[XE_ENGINE_CLASS_COPY] = DRM_XE_ENGINE_CLASS_COPY,
	[XE_ENGINE_CLASS_VIDEO_DECODE] = DRM_XE_ENGINE_CLASS_VIDEO_DECODE,
	[XE_ENGINE_CLASS_VIDEO_ENHANCE] = DRM_XE_ENGINE_CLASS_VIDEO_ENHANCE,
	[XE_ENGINE_CLASS_COMPUTE] = DRM_XE_ENGINE_CLASS_COMPUTE,
};

static const enum xe_engine_class user_to_xe_engine_class[] = {
	[DRM_XE_ENGINE_CLASS_RENDER] = XE_ENGINE_CLASS_RENDER,
	[DRM_XE_ENGINE_CLASS_COPY] = XE_ENGINE_CLASS_COPY,
	[DRM_XE_ENGINE_CLASS_VIDEO_DECODE] = XE_ENGINE_CLASS_VIDEO_DECODE,
	[DRM_XE_ENGINE_CLASS_VIDEO_ENHANCE] = XE_ENGINE_CLASS_VIDEO_ENHANCE,
	[DRM_XE_ENGINE_CLASS_COMPUTE] = XE_ENGINE_CLASS_COMPUTE,
};

static size_t calc_hw_engine_info_size(struct xe_device *xe)
{
	struct xe_hw_engine *hwe;
	enum xe_hw_engine_id id;
	struct xe_gt *gt;
	u8 gt_id;
	int i = 0;

	for_each_gt(gt, xe, gt_id)
		for_each_hw_engine(hwe, gt, id) {
			if (xe_hw_engine_is_reserved(hwe))
				continue;
			i++;
		}

	return sizeof(struct drm_xe_query_engines) +
		i * sizeof(struct drm_xe_engine);
}

typedef u64 (*__ktime_func_t)(void);
static __ktime_func_t __clock_id_to_func(clockid_t clk_id)
{
	/*
	 * Use logic same as the perf subsystem to allow user to select the
	 * reference clock id to be used for timestamps.
	 */
	switch (clk_id) {
	case CLOCK_MONOTONIC:
		return &ktime_get_ns;
	case CLOCK_MONOTONIC_RAW:
		return &ktime_get_raw_ns;
	case CLOCK_REALTIME:
		return &ktime_get_real_ns;
	case CLOCK_BOOTTIME:
		return &ktime_get_boottime_ns;
	case CLOCK_TAI:
		return &ktime_get_clocktai_ns;
	default:
		return NULL;
	}
}

static void
__read_timestamps(struct xe_gt *gt,
		  struct xe_reg lower_reg,
		  struct xe_reg upper_reg,
		  u64 *engine_ts,
		  u64 *cpu_ts,
		  u64 *cpu_delta,
		  __ktime_func_t cpu_clock)
{
	u32 upper, lower, old_upper, loop = 0;

	upper = xe_mmio_read32(gt, upper_reg);
	do {
		*cpu_delta = local_clock();
		*cpu_ts = cpu_clock();
		lower = xe_mmio_read32(gt, lower_reg);
		*cpu_delta = local_clock() - *cpu_delta;
		old_upper = upper;
		upper = xe_mmio_read32(gt, upper_reg);
	} while (upper != old_upper && loop++ < 2);

	*engine_ts = (u64)upper << 32 | lower;
}

static int
query_engine_cycles(struct xe_device *xe,
		    struct drm_xe_device_query *query)
{
	struct drm_xe_query_engine_cycles __user *query_ptr;
	struct drm_xe_engine_class_instance *eci;
	struct drm_xe_query_engine_cycles resp;
	size_t size = sizeof(resp);
	__ktime_func_t cpu_clock;
	struct xe_hw_engine *hwe;
	struct xe_gt *gt;

	if (query->size == 0) {
		query->size = size;
		return 0;
	} else if (XE_IOCTL_DBG(xe, query->size != size)) {
		return -EINVAL;
	}

	query_ptr = u64_to_user_ptr(query->data);
	if (copy_from_user(&resp, query_ptr, size))
		return -EFAULT;

	cpu_clock = __clock_id_to_func(resp.clockid);
	if (!cpu_clock)
		return -EINVAL;

	eci = &resp.eci;
	if (eci->gt_id >= XE_MAX_GT_PER_TILE)
		return -EINVAL;

	gt = xe_device_get_gt(xe, eci->gt_id);
	if (!gt)
		return -EINVAL;

	if (eci->engine_class >= ARRAY_SIZE(user_to_xe_engine_class))
		return -EINVAL;

	hwe = xe_gt_hw_engine(gt, user_to_xe_engine_class[eci->engine_class],
			      eci->engine_instance, true);
	if (!hwe)
		return -EINVAL;

	if (xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL))
		return -EIO;

	__read_timestamps(gt,
			  RING_TIMESTAMP(hwe->mmio_base),
			  RING_TIMESTAMP_UDW(hwe->mmio_base),
			  &resp.engine_cycles,
			  &resp.cpu_timestamp,
			  &resp.cpu_delta,
			  cpu_clock);

	xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL);
	resp.width = 36;

	/* Only write to the output fields of user query */
	if (put_user(resp.cpu_timestamp, &query_ptr->cpu_timestamp))
		return -EFAULT;

	if (put_user(resp.cpu_delta, &query_ptr->cpu_delta))
		return -EFAULT;

	if (put_user(resp.engine_cycles, &query_ptr->engine_cycles))
		return -EFAULT;

	if (put_user(resp.width, &query_ptr->width))
		return -EFAULT;

	return 0;
}

static int query_engines(struct xe_device *xe,
			 struct drm_xe_device_query *query)
{
	size_t size = calc_hw_engine_info_size(xe);
	struct drm_xe_query_engines __user *query_ptr =
		u64_to_user_ptr(query->data);
	struct drm_xe_query_engines *engines;
	struct xe_hw_engine *hwe;
	enum xe_hw_engine_id id;
	struct xe_gt *gt;
	u8 gt_id;
	int i = 0;

	if (query->size == 0) {
		query->size = size;
		return 0;
	} else if (XE_IOCTL_DBG(xe, query->size != size)) {
		return -EINVAL;
	}

	engines = kzalloc(size, GFP_KERNEL);
	if (!engines)
		return -ENOMEM;

	for_each_gt(gt, xe, gt_id)
		for_each_hw_engine(hwe, gt, id) {
			if (xe_hw_engine_is_reserved(hwe))
				continue;

			engines->engines[i].instance.engine_class =
				xe_to_user_engine_class[hwe->class];
			engines->engines[i].instance.engine_instance =
				hwe->logical_instance;
			engines->engines[i].instance.gt_id = gt->info.id;

			i++;
		}

	engines->num_engines = i;

	if (copy_to_user(query_ptr, engines, size)) {
		kfree(engines);
		return -EFAULT;
	}
	kfree(engines);

	return 0;
}

static size_t calc_mem_regions_size(struct xe_device *xe)
{
	u32 num_managers = 1;
	int i;

	for (i = XE_PL_VRAM0; i <= XE_PL_VRAM1; ++i)
		if (ttm_manager_type(&xe->ttm, i))
			num_managers++;

	return offsetof(struct drm_xe_query_mem_regions, mem_regions[num_managers]);
}

static int query_mem_regions(struct xe_device *xe,
			    struct drm_xe_device_query *query)
{
	size_t size = calc_mem_regions_size(xe);
	struct drm_xe_query_mem_regions *mem_regions;
	struct drm_xe_query_mem_regions __user *query_ptr =
		u64_to_user_ptr(query->data);
	struct ttm_resource_manager *man;
	int ret, i;

	if (query->size == 0) {
		query->size = size;
		return 0;
	} else if (XE_IOCTL_DBG(xe, query->size != size)) {
		return -EINVAL;
	}

	mem_regions = kzalloc(size, GFP_KERNEL);
	if (XE_IOCTL_DBG(xe, !mem_regions))
		return -ENOMEM;

	man = ttm_manager_type(&xe->ttm, XE_PL_TT);
	mem_regions->mem_regions[0].mem_class = DRM_XE_MEM_REGION_CLASS_SYSMEM;
	/*
	 * The instance needs to be a unique number that represents the index
	 * in the placement mask used at xe_gem_create_ioctl() for the
	 * xe_bo_create() placement.
	 */
	mem_regions->mem_regions[0].instance = 0;
	mem_regions->mem_regions[0].min_page_size = PAGE_SIZE;
	mem_regions->mem_regions[0].total_size = man->size << PAGE_SHIFT;
	if (perfmon_capable())
		mem_regions->mem_regions[0].used = ttm_resource_manager_usage(man);
	mem_regions->num_mem_regions = 1;

	for (i = XE_PL_VRAM0; i <= XE_PL_VRAM1; ++i) {
		man = ttm_manager_type(&xe->ttm, i);
		if (man) {
			mem_regions->mem_regions[mem_regions->num_mem_regions].mem_class =
				DRM_XE_MEM_REGION_CLASS_VRAM;
			mem_regions->mem_regions[mem_regions->num_mem_regions].instance =
				mem_regions->num_mem_regions;
			mem_regions->mem_regions[mem_regions->num_mem_regions].min_page_size =
				xe->info.vram_flags & XE_VRAM_FLAGS_NEED64K ?
				SZ_64K : PAGE_SIZE;
			mem_regions->mem_regions[mem_regions->num_mem_regions].total_size =
				man->size;

			if (perfmon_capable()) {
				xe_ttm_vram_get_used(man,
					&mem_regions->mem_regions
					[mem_regions->num_mem_regions].used,
					&mem_regions->mem_regions
					[mem_regions->num_mem_regions].cpu_visible_used);
			}

			mem_regions->mem_regions[mem_regions->num_mem_regions].cpu_visible_size =
				xe_ttm_vram_get_cpu_visible_size(man);
			mem_regions->num_mem_regions++;
		}
	}

	if (!copy_to_user(query_ptr, mem_regions, size))
		ret = 0;
	else
		ret = -ENOSPC;

	kfree(mem_regions);
	return ret;
}

static int query_config(struct xe_device *xe, struct drm_xe_device_query *query)
{
	const u32 num_params = DRM_XE_QUERY_CONFIG_MAX_EXEC_QUEUE_PRIORITY + 1;
	size_t size =
		sizeof(struct drm_xe_query_config) + num_params * sizeof(u64);
	struct drm_xe_query_config __user *query_ptr =
		u64_to_user_ptr(query->data);
	struct drm_xe_query_config *config;

	if (query->size == 0) {
		query->size = size;
		return 0;
	} else if (XE_IOCTL_DBG(xe, query->size != size)) {
		return -EINVAL;
	}

	config = kzalloc(size, GFP_KERNEL);
	if (!config)
		return -ENOMEM;

	config->num_params = num_params;
	config->info[DRM_XE_QUERY_CONFIG_REV_AND_DEVICE_ID] =
		xe->info.devid | (xe->info.revid << 16);
	if (xe_device_get_root_tile(xe)->mem.vram.usable_size)
		config->info[DRM_XE_QUERY_CONFIG_FLAGS] =
			DRM_XE_QUERY_CONFIG_FLAG_HAS_VRAM;
	config->info[DRM_XE_QUERY_CONFIG_MIN_ALIGNMENT] =
		xe->info.vram_flags & XE_VRAM_FLAGS_NEED64K ? SZ_64K : SZ_4K;
	config->info[DRM_XE_QUERY_CONFIG_VA_BITS] = xe->info.va_bits;
	config->info[DRM_XE_QUERY_CONFIG_MAX_EXEC_QUEUE_PRIORITY] =
		xe_exec_queue_device_get_max_priority(xe);

	if (copy_to_user(query_ptr, config, size)) {
		kfree(config);
		return -EFAULT;
	}
	kfree(config);

	return 0;
}

static int query_gt_list(struct xe_device *xe, struct drm_xe_device_query *query)
{
	struct xe_gt *gt;
	size_t size = sizeof(struct drm_xe_query_gt_list) +
		xe->info.gt_count * sizeof(struct drm_xe_gt);
	struct drm_xe_query_gt_list __user *query_ptr =
		u64_to_user_ptr(query->data);
	struct drm_xe_query_gt_list *gt_list;
	u8 id;

	if (query->size == 0) {
		query->size = size;
		return 0;
	} else if (XE_IOCTL_DBG(xe, query->size != size)) {
		return -EINVAL;
	}

	gt_list = kzalloc(size, GFP_KERNEL);
	if (!gt_list)
		return -ENOMEM;

	gt_list->num_gt = xe->info.gt_count;

	for_each_gt(gt, xe, id) {
		if (xe_gt_is_media_type(gt))
			gt_list->gt_list[id].type = DRM_XE_QUERY_GT_TYPE_MEDIA;
		else
			gt_list->gt_list[id].type = DRM_XE_QUERY_GT_TYPE_MAIN;
		gt_list->gt_list[id].tile_id = gt_to_tile(gt)->id;
		gt_list->gt_list[id].gt_id = gt->info.id;
		gt_list->gt_list[id].reference_clock = gt->info.reference_clock;
		/*
		 * The mem_regions indexes in the mask below need to
		 * directly identify the struct
		 * drm_xe_query_mem_regions' instance constructed at
		 * query_mem_regions()
		 *
		 * For our current platforms:
		 * Bit 0 -> System Memory
		 * Bit 1 -> VRAM0 on Tile0
		 * Bit 2 -> VRAM1 on Tile1
		 * However the uAPI is generic and it's userspace's
		 * responsibility to check the mem_class, without any
		 * assumption.
		 */
		if (!IS_DGFX(xe))
			gt_list->gt_list[id].near_mem_regions = 0x1;
		else
			gt_list->gt_list[id].near_mem_regions =
				BIT(gt_to_tile(gt)->id) << 1;
		gt_list->gt_list[id].far_mem_regions = xe->info.mem_region_mask ^
			gt_list->gt_list[id].near_mem_regions;

		gt_list->gt_list[id].ip_ver_major =
			REG_FIELD_GET(GMD_ID_ARCH_MASK, gt->info.gmdid);
		gt_list->gt_list[id].ip_ver_minor =
			REG_FIELD_GET(GMD_ID_RELEASE_MASK, gt->info.gmdid);
		gt_list->gt_list[id].ip_ver_rev =
			REG_FIELD_GET(GMD_ID_REVID, gt->info.gmdid);
	}

	if (copy_to_user(query_ptr, gt_list, size)) {
		kfree(gt_list);
		return -EFAULT;
	}
	kfree(gt_list);

	return 0;
}

static int query_hwconfig(struct xe_device *xe,
			  struct drm_xe_device_query *query)
{
	struct xe_gt *gt = xe_root_mmio_gt(xe);
	size_t size = xe_guc_hwconfig_size(&gt->uc.guc);
	void __user *query_ptr = u64_to_user_ptr(query->data);
	void *hwconfig;

	if (query->size == 0) {
		query->size = size;
		return 0;
	} else if (XE_IOCTL_DBG(xe, query->size != size)) {
		return -EINVAL;
	}

	hwconfig = kzalloc(size, GFP_KERNEL);
	if (!hwconfig)
		return -ENOMEM;

	xe_guc_hwconfig_copy(&gt->uc.guc, hwconfig);

	if (copy_to_user(query_ptr, hwconfig, size)) {
		kfree(hwconfig);
		return -EFAULT;
	}
	kfree(hwconfig);

	return 0;
}

static size_t calc_topo_query_size(struct xe_device *xe)
{
	return xe->info.gt_count *
		(4 * sizeof(struct drm_xe_query_topology_mask) +
		 sizeof_field(struct xe_gt, fuse_topo.g_dss_mask) +
		 sizeof_field(struct xe_gt, fuse_topo.c_dss_mask) +
		 sizeof_field(struct xe_gt, fuse_topo.l3_bank_mask) +
		 sizeof_field(struct xe_gt, fuse_topo.eu_mask_per_dss));
}

static int copy_mask(void __user **ptr,
		     struct drm_xe_query_topology_mask *topo,
		     void *mask, size_t mask_size)
{
	topo->num_bytes = mask_size;

	if (copy_to_user(*ptr, topo, sizeof(*topo)))
		return -EFAULT;
	*ptr += sizeof(topo);

	if (copy_to_user(*ptr, mask, mask_size))
		return -EFAULT;
	*ptr += mask_size;

	return 0;
}

static int query_gt_topology(struct xe_device *xe,
			     struct drm_xe_device_query *query)
{
	void __user *query_ptr = u64_to_user_ptr(query->data);
	size_t size = calc_topo_query_size(xe);
	struct drm_xe_query_topology_mask topo;
	struct xe_gt *gt;
	int id;

	if (query->size == 0) {
		query->size = size;
		return 0;
	} else if (XE_IOCTL_DBG(xe, query->size != size)) {
		return -EINVAL;
	}

	for_each_gt(gt, xe, id) {
		int err;

		topo.gt_id = id;

		topo.type = DRM_XE_TOPO_DSS_GEOMETRY;
		err = copy_mask(&query_ptr, &topo, gt->fuse_topo.g_dss_mask,
				sizeof(gt->fuse_topo.g_dss_mask));
		if (err)
			return err;

		topo.type = DRM_XE_TOPO_DSS_COMPUTE;
		err = copy_mask(&query_ptr, &topo, gt->fuse_topo.c_dss_mask,
				sizeof(gt->fuse_topo.c_dss_mask));
		if (err)
			return err;

		topo.type = DRM_XE_TOPO_L3_BANK;
		err = copy_mask(&query_ptr, &topo, gt->fuse_topo.l3_bank_mask,
				sizeof(gt->fuse_topo.l3_bank_mask));
		if (err)
			return err;

		topo.type = gt->fuse_topo.eu_type == XE_GT_EU_TYPE_SIMD16 ?
			DRM_XE_TOPO_SIMD16_EU_PER_DSS :
			DRM_XE_TOPO_EU_PER_DSS;
		err = copy_mask(&query_ptr, &topo,
				gt->fuse_topo.eu_mask_per_dss,
				sizeof(gt->fuse_topo.eu_mask_per_dss));
		if (err)
			return err;
	}

	return 0;
}

static int
query_uc_fw_version(struct xe_device *xe, struct drm_xe_device_query *query)
{
	struct drm_xe_query_uc_fw_version __user *query_ptr = u64_to_user_ptr(query->data);
	size_t size = sizeof(struct drm_xe_query_uc_fw_version);
	struct drm_xe_query_uc_fw_version resp;
	struct xe_uc_fw_version *version = NULL;

	if (query->size == 0) {
		query->size = size;
		return 0;
	} else if (XE_IOCTL_DBG(xe, query->size != size)) {
		return -EINVAL;
	}

	if (copy_from_user(&resp, query_ptr, size))
		return -EFAULT;

	if (XE_IOCTL_DBG(xe, resp.pad || resp.pad2 || resp.reserved))
		return -EINVAL;

	switch (resp.uc_type) {
	case XE_QUERY_UC_TYPE_GUC_SUBMISSION: {
		struct xe_guc *guc = &xe->tiles[0].primary_gt->uc.guc;

		version = &guc->fw.versions.found[XE_UC_FW_VER_COMPATIBILITY];
		break;
	}
	case XE_QUERY_UC_TYPE_HUC: {
		struct xe_gt *media_gt = NULL;
		struct xe_huc *huc;

		if (MEDIA_VER(xe) >= 13) {
			struct xe_tile *tile;
			u8 gt_id;

			for_each_tile(tile, xe, gt_id) {
				if (tile->media_gt) {
					media_gt = tile->media_gt;
					break;
				}
			}
		} else {
			media_gt = xe->tiles[0].primary_gt;
		}

		if (!media_gt)
			break;

		huc = &media_gt->uc.huc;
		if (huc->fw.status == XE_UC_FIRMWARE_RUNNING)
			version = &huc->fw.versions.found[XE_UC_FW_VER_RELEASE];
		break;
	}
	default:
		return -EINVAL;
	}

	if (version) {
		resp.branch_ver = 0;
		resp.major_ver = version->major;
		resp.minor_ver = version->minor;
		resp.patch_ver = version->patch;
	} else {
		return -ENODEV;
	}

	if (copy_to_user(query_ptr, &resp, size))
		return -EFAULT;

	return 0;
}

static size_t calc_oa_unit_query_size(struct xe_device *xe)
{
	size_t size = sizeof(struct drm_xe_query_oa_units);
	struct xe_gt *gt;
	int i, id;

	for_each_gt(gt, xe, id) {
		for (i = 0; i < gt->oa.num_oa_units; i++) {
			size += sizeof(struct drm_xe_oa_unit);
			size += gt->oa.oa_unit[i].num_engines *
				sizeof(struct drm_xe_engine_class_instance);
		}
	}

	return size;
}

static int query_oa_units(struct xe_device *xe,
			  struct drm_xe_device_query *query)
{
	void __user *query_ptr = u64_to_user_ptr(query->data);
	size_t size = calc_oa_unit_query_size(xe);
	struct drm_xe_query_oa_units *qoa;
	enum xe_hw_engine_id hwe_id;
	struct drm_xe_oa_unit *du;
	struct xe_hw_engine *hwe;
	struct xe_oa_unit *u;
	int gt_id, i, j, ret;
	struct xe_gt *gt;
	u8 *pdu;

	if (query->size == 0) {
		query->size = size;
		return 0;
	} else if (XE_IOCTL_DBG(xe, query->size != size)) {
		return -EINVAL;
	}

	qoa = kzalloc(size, GFP_KERNEL);
	if (!qoa)
		return -ENOMEM;

	pdu = (u8 *)&qoa->oa_units[0];
	for_each_gt(gt, xe, gt_id) {
		for (i = 0; i < gt->oa.num_oa_units; i++) {
			u = &gt->oa.oa_unit[i];
			du = (struct drm_xe_oa_unit *)pdu;

			du->oa_unit_id = u->oa_unit_id;
			du->oa_unit_type = u->type;
			du->oa_timestamp_freq = xe_oa_timestamp_frequency(gt);
			du->capabilities = DRM_XE_OA_CAPS_BASE;

			j = 0;
			for_each_hw_engine(hwe, gt, hwe_id) {
				if (!xe_hw_engine_is_reserved(hwe) &&
				    xe_oa_unit_id(hwe) == u->oa_unit_id) {
					du->eci[j].engine_class =
						xe_to_user_engine_class[hwe->class];
					du->eci[j].engine_instance = hwe->logical_instance;
					du->eci[j].gt_id = gt->info.id;
					j++;
				}
			}
			du->num_engines = j;
			pdu += sizeof(*du) + j * sizeof(du->eci[0]);
			qoa->num_oa_units++;
		}
	}

	ret = copy_to_user(query_ptr, qoa, size);
	kfree(qoa);

	return ret ? -EFAULT : 0;
}

static int (* const xe_query_funcs[])(struct xe_device *xe,
				      struct drm_xe_device_query *query) = {
	query_engines,
	query_mem_regions,
	query_config,
	query_gt_list,
	query_hwconfig,
	query_gt_topology,
	query_engine_cycles,
	query_uc_fw_version,
	query_oa_units,
};

int xe_query_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
{
	struct xe_device *xe = to_xe_device(dev);
	struct drm_xe_device_query *query = data;
	u32 idx;

	if (XE_IOCTL_DBG(xe, query->extensions) ||
	    XE_IOCTL_DBG(xe, query->reserved[0] || query->reserved[1]))
		return -EINVAL;

	if (XE_IOCTL_DBG(xe, query->query >= ARRAY_SIZE(xe_query_funcs)))
		return -EINVAL;

	idx = array_index_nospec(query->query, ARRAY_SIZE(xe_query_funcs));
	if (XE_IOCTL_DBG(xe, !xe_query_funcs[idx]))
		return -EINVAL;

	return xe_query_funcs[idx](xe, query);
}