summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/imagination/pvr_drv.c
blob: fb17196e05f498d81e85506c216461a8c1302ff1 (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
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
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
// SPDX-License-Identifier: GPL-2.0-only OR MIT
/* Copyright (c) 2023 Imagination Technologies Ltd. */

#include "pvr_context.h"
#include "pvr_debugfs.h"
#include "pvr_device.h"
#include "pvr_drv.h"
#include "pvr_free_list.h"
#include "pvr_gem.h"
#include "pvr_hwrt.h"
#include "pvr_job.h"
#include "pvr_mmu.h"
#include "pvr_power.h"
#include "pvr_rogue_defs.h"
#include "pvr_rogue_fwif_client.h"
#include "pvr_rogue_fwif_shared.h"
#include "pvr_vm.h"

#include <uapi/drm/pvr_drm.h>

#include <drm/drm_device.h>
#include <drm/drm_drv.h>
#include <drm/drm_file.h>
#include <drm/drm_gem.h>
#include <drm/drm_ioctl.h>

#include <linux/err.h>
#include <linux/export.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/xarray.h>

/**
 * DOC: PowerVR (Series 6 and later) and IMG Graphics Driver
 *
 * This driver supports the following PowerVR/IMG graphics cores from Imagination Technologies:
 *
 * * AXE-1-16M (found in Texas Instruments AM62)
 */

/**
 * pvr_ioctl_create_bo() - IOCTL to create a GEM buffer object.
 * @drm_dev: [IN] Target DRM device.
 * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
 * &struct drm_pvr_ioctl_create_bo_args.
 * @file: [IN] DRM file-private data.
 *
 * Called from userspace with %DRM_IOCTL_PVR_CREATE_BO.
 *
 * Return:
 *  * 0 on success,
 *  * -%EINVAL if the value of &drm_pvr_ioctl_create_bo_args.size is zero
 *    or wider than &typedef size_t,
 *  * -%EINVAL if any bits in &drm_pvr_ioctl_create_bo_args.flags that are
 *    reserved or undefined are set,
 *  * -%EINVAL if any padding fields in &drm_pvr_ioctl_create_bo_args are not
 *    zero,
 *  * Any error encountered while creating the object (see
 *    pvr_gem_object_create()), or
 *  * Any error encountered while transferring ownership of the object into a
 *    userspace-accessible handle (see pvr_gem_object_into_handle()).
 */
static int
pvr_ioctl_create_bo(struct drm_device *drm_dev, void *raw_args,
		    struct drm_file *file)
{
	struct drm_pvr_ioctl_create_bo_args *args = raw_args;
	struct pvr_device *pvr_dev = to_pvr_device(drm_dev);
	struct pvr_file *pvr_file = to_pvr_file(file);

	struct pvr_gem_object *pvr_obj;
	size_t sanitized_size;

	int idx;
	int err;

	if (!drm_dev_enter(drm_dev, &idx))
		return -EIO;

	/* All padding fields must be zeroed. */
	if (args->_padding_c != 0) {
		err = -EINVAL;
		goto err_drm_dev_exit;
	}

	/*
	 * On 64-bit platforms (our primary target), size_t is a u64. However,
	 * on other architectures we have to check for overflow when casting
	 * down to size_t from u64.
	 *
	 * We also disallow zero-sized allocations, and reserved (kernel-only)
	 * flags.
	 */
	if (args->size > SIZE_MAX || args->size == 0 || args->flags &
	    ~DRM_PVR_BO_FLAGS_MASK || args->size & (PVR_DEVICE_PAGE_SIZE - 1)) {
		err = -EINVAL;
		goto err_drm_dev_exit;
	}

	sanitized_size = (size_t)args->size;

	/*
	 * Create a buffer object and transfer ownership to a userspace-
	 * accessible handle.
	 */
	pvr_obj = pvr_gem_object_create(pvr_dev, sanitized_size, args->flags);
	if (IS_ERR(pvr_obj)) {
		err = PTR_ERR(pvr_obj);
		goto err_drm_dev_exit;
	}

	/* This function will not modify &args->handle unless it succeeds. */
	err = pvr_gem_object_into_handle(pvr_obj, pvr_file, &args->handle);
	if (err)
		goto err_destroy_obj;

	drm_dev_exit(idx);

	return 0;

err_destroy_obj:
	/*
	 * GEM objects are refcounted, so there is no explicit destructor
	 * function. Instead, we release the singular reference we currently
	 * hold on the object and let GEM take care of the rest.
	 */
	pvr_gem_object_put(pvr_obj);

err_drm_dev_exit:
	drm_dev_exit(idx);

	return err;
}

/**
 * pvr_ioctl_get_bo_mmap_offset() - IOCTL to generate a "fake" offset to be
 * used when calling mmap() from userspace to map the given GEM buffer object
 * @drm_dev: [IN] DRM device (unused).
 * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
 *                     &struct drm_pvr_ioctl_get_bo_mmap_offset_args.
 * @file: [IN] DRM file private data.
 *
 * Called from userspace with %DRM_IOCTL_PVR_GET_BO_MMAP_OFFSET.
 *
 * This IOCTL does *not* perform an mmap. See the docs on
 * &struct drm_pvr_ioctl_get_bo_mmap_offset_args for details.
 *
 * Return:
 *  * 0 on success,
 *  * -%ENOENT if the handle does not reference a valid GEM buffer object,
 *  * -%EINVAL if any padding fields in &struct
 *    drm_pvr_ioctl_get_bo_mmap_offset_args are not zero, or
 *  * Any error returned by drm_gem_create_mmap_offset().
 */
static int
pvr_ioctl_get_bo_mmap_offset(struct drm_device *drm_dev, void *raw_args,
			     struct drm_file *file)
{
	struct drm_pvr_ioctl_get_bo_mmap_offset_args *args = raw_args;
	struct pvr_file *pvr_file = to_pvr_file(file);
	struct pvr_gem_object *pvr_obj;
	struct drm_gem_object *gem_obj;
	int idx;
	int ret;

	if (!drm_dev_enter(drm_dev, &idx))
		return -EIO;

	/* All padding fields must be zeroed. */
	if (args->_padding_4 != 0) {
		ret = -EINVAL;
		goto err_drm_dev_exit;
	}

	/*
	 * Obtain a kernel reference to the buffer object. This reference is
	 * counted and must be manually dropped before returning. If a buffer
	 * object cannot be found for the specified handle, return -%ENOENT (No
	 * such file or directory).
	 */
	pvr_obj = pvr_gem_object_from_handle(pvr_file, args->handle);
	if (!pvr_obj) {
		ret = -ENOENT;
		goto err_drm_dev_exit;
	}

	gem_obj = gem_from_pvr_gem(pvr_obj);

	/*
	 * Allocate a fake offset which can be used in userspace calls to mmap
	 * on the DRM device file. If this fails, return the error code. This
	 * operation is idempotent.
	 */
	ret = drm_gem_create_mmap_offset(gem_obj);
	if (ret != 0) {
		/* Drop our reference to the buffer object. */
		drm_gem_object_put(gem_obj);
		goto err_drm_dev_exit;
	}

	/*
	 * Read out the fake offset allocated by the earlier call to
	 * drm_gem_create_mmap_offset.
	 */
	args->offset = drm_vma_node_offset_addr(&gem_obj->vma_node);

	/* Drop our reference to the buffer object. */
	pvr_gem_object_put(pvr_obj);

err_drm_dev_exit:
	drm_dev_exit(idx);

	return ret;
}

static __always_inline u64
pvr_fw_version_packed(u32 major, u32 minor)
{
	return ((u64)major << 32) | minor;
}

static u32
rogue_get_common_store_partition_space_size(struct pvr_device *pvr_dev)
{
	u32 max_partitions = 0;
	u32 tile_size_x = 0;
	u32 tile_size_y = 0;

	PVR_FEATURE_VALUE(pvr_dev, tile_size_x, &tile_size_x);
	PVR_FEATURE_VALUE(pvr_dev, tile_size_y, &tile_size_y);
	PVR_FEATURE_VALUE(pvr_dev, max_partitions, &max_partitions);

	if (tile_size_x == 16 && tile_size_y == 16) {
		u32 usc_min_output_registers_per_pix = 0;

		PVR_FEATURE_VALUE(pvr_dev, usc_min_output_registers_per_pix,
				  &usc_min_output_registers_per_pix);

		return tile_size_x * tile_size_y * max_partitions *
		       usc_min_output_registers_per_pix;
	}

	return max_partitions * 1024;
}

static u32
rogue_get_common_store_alloc_region_size(struct pvr_device *pvr_dev)
{
	u32 common_store_size_in_dwords = 512 * 4 * 4;
	u32 alloc_region_size;

	PVR_FEATURE_VALUE(pvr_dev, common_store_size_in_dwords, &common_store_size_in_dwords);

	alloc_region_size = common_store_size_in_dwords - (256U * 4U) -
			    rogue_get_common_store_partition_space_size(pvr_dev);

	if (PVR_HAS_QUIRK(pvr_dev, 44079)) {
		u32 common_store_split_point = (768U * 4U * 4U);

		return min(common_store_split_point - (256U * 4U), alloc_region_size);
	}

	return alloc_region_size;
}

static inline u32
rogue_get_num_phantoms(struct pvr_device *pvr_dev)
{
	u32 num_clusters = 1;

	PVR_FEATURE_VALUE(pvr_dev, num_clusters, &num_clusters);

	return ROGUE_REQ_NUM_PHANTOMS(num_clusters);
}

static inline u32
rogue_get_max_coeffs(struct pvr_device *pvr_dev)
{
	u32 max_coeff_additional_portion = ROGUE_MAX_VERTEX_SHARED_REGISTERS;
	u32 pending_allocation_shared_regs = 2U * 1024U;
	u32 pending_allocation_coeff_regs = 0U;
	u32 num_phantoms = rogue_get_num_phantoms(pvr_dev);
	u32 tiles_in_flight = 0;
	u32 max_coeff_pixel_portion;

	PVR_FEATURE_VALUE(pvr_dev, isp_max_tiles_in_flight, &tiles_in_flight);
	max_coeff_pixel_portion = DIV_ROUND_UP(tiles_in_flight, num_phantoms);
	max_coeff_pixel_portion *= ROGUE_MAX_PIXEL_SHARED_REGISTERS;

	/*
	 * Compute tasks on cores with BRN48492 and without compute overlap may lock
	 * up without two additional lines of coeffs.
	 */
	if (PVR_HAS_QUIRK(pvr_dev, 48492) && !PVR_HAS_FEATURE(pvr_dev, compute_overlap))
		pending_allocation_coeff_regs = 2U * 1024U;

	if (PVR_HAS_ENHANCEMENT(pvr_dev, 38748))
		pending_allocation_shared_regs = 0;

	if (PVR_HAS_ENHANCEMENT(pvr_dev, 38020))
		max_coeff_additional_portion += ROGUE_MAX_COMPUTE_SHARED_REGISTERS;

	return rogue_get_common_store_alloc_region_size(pvr_dev) + pending_allocation_coeff_regs -
		(max_coeff_pixel_portion + max_coeff_additional_portion +
		 pending_allocation_shared_regs);
}

static inline u32
rogue_get_cdm_max_local_mem_size_regs(struct pvr_device *pvr_dev)
{
	u32 available_coeffs_in_dwords = rogue_get_max_coeffs(pvr_dev);

	if (PVR_HAS_QUIRK(pvr_dev, 48492) && PVR_HAS_FEATURE(pvr_dev, roguexe) &&
	    !PVR_HAS_FEATURE(pvr_dev, compute_overlap)) {
		/* Driver must not use the 2 reserved lines. */
		available_coeffs_in_dwords -= ROGUE_CSRM_LINE_SIZE_IN_DWORDS * 2;
	}

	/*
	 * The maximum amount of local memory available to a kernel is the minimum
	 * of the total number of coefficient registers available and the max common
	 * store allocation size which can be made by the CDM.
	 *
	 * If any coeff lines are reserved for tessellation or pixel then we need to
	 * subtract those too.
	 */
	return min(available_coeffs_in_dwords, (u32)ROGUE_MAX_PER_KERNEL_LOCAL_MEM_SIZE_REGS);
}

/**
 * pvr_dev_query_gpu_info_get()
 * @pvr_dev: Device pointer.
 * @args: [IN] Device query arguments containing a pointer to a userspace
 *        struct drm_pvr_dev_query_gpu_info.
 *
 * If the query object pointer is NULL, the size field is updated with the
 * expected size of the query object.
 *
 * Returns:
 *  * 0 on success, or if size is requested using a NULL pointer, or
 *  * -%E2BIG if the indicated length of the allocation is less than is
 *    required to contain the copied data, or
 *  * -%EFAULT if local memory could not be copied to userspace.
 */
static int
pvr_dev_query_gpu_info_get(struct pvr_device *pvr_dev,
			   struct drm_pvr_ioctl_dev_query_args *args)
{
	struct drm_pvr_dev_query_gpu_info gpu_info = {0};
	int err;

	if (!args->pointer) {
		args->size = sizeof(struct drm_pvr_dev_query_gpu_info);
		return 0;
	}

	gpu_info.gpu_id =
		pvr_gpu_id_to_packed_bvnc(&pvr_dev->gpu_id);
	gpu_info.num_phantoms = rogue_get_num_phantoms(pvr_dev);

	err = PVR_UOBJ_SET(args->pointer, args->size, gpu_info);
	if (err < 0)
		return err;

	if (args->size > sizeof(gpu_info))
		args->size = sizeof(gpu_info);
	return 0;
}

/**
 * pvr_dev_query_runtime_info_get()
 * @pvr_dev: Device pointer.
 * @args: [IN] Device query arguments containing a pointer to a userspace
 *        struct drm_pvr_dev_query_runtime_info.
 *
 * If the query object pointer is NULL, the size field is updated with the
 * expected size of the query object.
 *
 * Returns:
 *  * 0 on success, or if size is requested using a NULL pointer, or
 *  * -%E2BIG if the indicated length of the allocation is less than is
 *    required to contain the copied data, or
 *  * -%EFAULT if local memory could not be copied to userspace.
 */
static int
pvr_dev_query_runtime_info_get(struct pvr_device *pvr_dev,
			       struct drm_pvr_ioctl_dev_query_args *args)
{
	struct drm_pvr_dev_query_runtime_info runtime_info = {0};
	int err;

	if (!args->pointer) {
		args->size = sizeof(struct drm_pvr_dev_query_runtime_info);
		return 0;
	}

	runtime_info.free_list_min_pages =
		pvr_get_free_list_min_pages(pvr_dev);
	runtime_info.free_list_max_pages =
		ROGUE_PM_MAX_FREELIST_SIZE / ROGUE_PM_PAGE_SIZE;
	runtime_info.common_store_alloc_region_size =
		rogue_get_common_store_alloc_region_size(pvr_dev);
	runtime_info.common_store_partition_space_size =
		rogue_get_common_store_partition_space_size(pvr_dev);
	runtime_info.max_coeffs = rogue_get_max_coeffs(pvr_dev);
	runtime_info.cdm_max_local_mem_size_regs =
		rogue_get_cdm_max_local_mem_size_regs(pvr_dev);

	err = PVR_UOBJ_SET(args->pointer, args->size, runtime_info);
	if (err < 0)
		return err;

	if (args->size > sizeof(runtime_info))
		args->size = sizeof(runtime_info);
	return 0;
}

/**
 * pvr_dev_query_quirks_get() - Unpack array of quirks at the address given
 * in a struct drm_pvr_dev_query_quirks, or gets the amount of space required
 * for it.
 * @pvr_dev: Device pointer.
 * @args: [IN] Device query arguments containing a pointer to a userspace
 *        struct drm_pvr_dev_query_query_quirks.
 *
 * If the query object pointer is NULL, the size field is updated with the
 * expected size of the query object.
 * If the userspace pointer in the query object is NULL, or the count is
 * short, no data is copied.
 * The count field will be updated to that copied, or if either pointer is
 * NULL, that which would have been copied.
 * The size field in the query object will be updated to the size copied.
 *
 * Returns:
 *  * 0 on success, or if size/count is requested using a NULL pointer, or
 *  * -%EINVAL if args contained non-zero reserved fields, or
 *  * -%E2BIG if the indicated length of the allocation is less than is
 *    required to contain the copied data, or
 *  * -%EFAULT if local memory could not be copied to userspace.
 */
static int
pvr_dev_query_quirks_get(struct pvr_device *pvr_dev,
			 struct drm_pvr_ioctl_dev_query_args *args)
{
	/*
	 * @FIXME - hardcoding of numbers here is intended as an
	 * intermediate step so the UAPI can be fixed, but requires a
	 * a refactor in the future to store them in a more appropriate
	 * location
	 */
	static const u32 umd_quirks_musthave[] = {
		47217,
		49927,
		62269,
	};
	static const u32 umd_quirks[] = {
		48545,
		51764,
	};
	struct drm_pvr_dev_query_quirks query;
	u32 out[ARRAY_SIZE(umd_quirks_musthave) + ARRAY_SIZE(umd_quirks)];
	size_t out_musthave_count = 0;
	size_t out_count = 0;
	int err;

	if (!args->pointer) {
		args->size = sizeof(struct drm_pvr_dev_query_quirks);
		return 0;
	}

	err = PVR_UOBJ_GET(query, args->size, args->pointer);

	if (err < 0)
		return err;
	if (query._padding_c)
		return -EINVAL;

	for (int i = 0; i < ARRAY_SIZE(umd_quirks_musthave); i++) {
		if (pvr_device_has_uapi_quirk(pvr_dev, umd_quirks_musthave[i])) {
			out[out_count++] = umd_quirks_musthave[i];
			out_musthave_count++;
		}
	}

	for (int i = 0; i < ARRAY_SIZE(umd_quirks); i++) {
		if (pvr_device_has_uapi_quirk(pvr_dev, umd_quirks[i]))
			out[out_count++] = umd_quirks[i];
	}

	if (!query.quirks)
		goto copy_out;
	if (query.count < out_count)
		return -E2BIG;

	if (copy_to_user(u64_to_user_ptr(query.quirks), out,
			 out_count * sizeof(u32))) {
		return -EFAULT;
	}

	query.musthave_count = out_musthave_count;

copy_out:
	query.count = out_count;
	err = PVR_UOBJ_SET(args->pointer, args->size, query);
	if (err < 0)
		return err;

	args->size = sizeof(query);
	return 0;
}

/**
 * pvr_dev_query_enhancements_get() - Unpack array of enhancements at the
 * address given in a struct drm_pvr_dev_query_enhancements, or gets the amount
 * of space required for it.
 * @pvr_dev: Device pointer.
 * @args: [IN] Device query arguments containing a pointer to a userspace
 *        struct drm_pvr_dev_query_enhancements.
 *
 * If the query object pointer is NULL, the size field is updated with the
 * expected size of the query object.
 * If the userspace pointer in the query object is NULL, or the count is
 * short, no data is copied.
 * The count field will be updated to that copied, or if either pointer is
 * NULL, that which would have been copied.
 * The size field in the query object will be updated to the size copied.
 *
 * Returns:
 *  * 0 on success, or if size/count is requested using a NULL pointer, or
 *  * -%EINVAL if args contained non-zero reserved fields, or
 *  * -%E2BIG if the indicated length of the allocation is less than is
 *    required to contain the copied data, or
 *  * -%EFAULT if local memory could not be copied to userspace.
 */
static int
pvr_dev_query_enhancements_get(struct pvr_device *pvr_dev,
			       struct drm_pvr_ioctl_dev_query_args *args)
{
	/*
	 * @FIXME - hardcoding of numbers here is intended as an
	 * intermediate step so the UAPI can be fixed, but requires a
	 * a refactor in the future to store them in a more appropriate
	 * location
	 */
	const u32 umd_enhancements[] = {
		35421,
		42064,
	};
	struct drm_pvr_dev_query_enhancements query;
	u32 out[ARRAY_SIZE(umd_enhancements)];
	size_t out_idx = 0;
	int err;

	if (!args->pointer) {
		args->size = sizeof(struct drm_pvr_dev_query_enhancements);
		return 0;
	}

	err = PVR_UOBJ_GET(query, args->size, args->pointer);

	if (err < 0)
		return err;
	if (query._padding_a)
		return -EINVAL;
	if (query._padding_c)
		return -EINVAL;

	for (int i = 0; i < ARRAY_SIZE(umd_enhancements); i++) {
		if (pvr_device_has_uapi_enhancement(pvr_dev, umd_enhancements[i]))
			out[out_idx++] = umd_enhancements[i];
	}

	if (!query.enhancements)
		goto copy_out;
	if (query.count < out_idx)
		return -E2BIG;

	if (copy_to_user(u64_to_user_ptr(query.enhancements), out,
			 out_idx * sizeof(u32))) {
		return -EFAULT;
	}

copy_out:
	query.count = out_idx;
	err = PVR_UOBJ_SET(args->pointer, args->size, query);
	if (err < 0)
		return err;

	args->size = sizeof(query);
	return 0;
}

/**
 * pvr_ioctl_dev_query() - IOCTL to copy information about a device
 * @drm_dev: [IN] DRM device.
 * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
 *                     &struct drm_pvr_ioctl_dev_query_args.
 * @file: [IN] DRM file private data.
 *
 * Called from userspace with %DRM_IOCTL_PVR_DEV_QUERY.
 * If the given receiving struct pointer is NULL, or the indicated size is too
 * small, the expected size of the struct type will be returned in the size
 * argument field.
 *
 * Return:
 *  * 0 on success or when fetching the size with args->pointer == NULL, or
 *  * -%E2BIG if the indicated size of the receiving struct is less than is
 *    required to contain the copied data, or
 *  * -%EINVAL if the indicated struct type is unknown, or
 *  * -%ENOMEM if local memory could not be allocated, or
 *  * -%EFAULT if local memory could not be copied to userspace.
 */
static int
pvr_ioctl_dev_query(struct drm_device *drm_dev, void *raw_args,
		    struct drm_file *file)
{
	struct pvr_device *pvr_dev = to_pvr_device(drm_dev);
	struct drm_pvr_ioctl_dev_query_args *args = raw_args;
	int idx;
	int ret = -EINVAL;

	if (!drm_dev_enter(drm_dev, &idx))
		return -EIO;

	switch ((enum drm_pvr_dev_query)args->type) {
	case DRM_PVR_DEV_QUERY_GPU_INFO_GET:
		ret = pvr_dev_query_gpu_info_get(pvr_dev, args);
		break;

	case DRM_PVR_DEV_QUERY_RUNTIME_INFO_GET:
		ret = pvr_dev_query_runtime_info_get(pvr_dev, args);
		break;

	case DRM_PVR_DEV_QUERY_QUIRKS_GET:
		ret = pvr_dev_query_quirks_get(pvr_dev, args);
		break;

	case DRM_PVR_DEV_QUERY_ENHANCEMENTS_GET:
		ret = pvr_dev_query_enhancements_get(pvr_dev, args);
		break;

	case DRM_PVR_DEV_QUERY_HEAP_INFO_GET:
		ret = pvr_heap_info_get(pvr_dev, args);
		break;

	case DRM_PVR_DEV_QUERY_STATIC_DATA_AREAS_GET:
		ret = pvr_static_data_areas_get(pvr_dev, args);
		break;
	}

	drm_dev_exit(idx);

	return ret;
}

/**
 * pvr_ioctl_create_context() - IOCTL to create a context
 * @drm_dev: [IN] DRM device.
 * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
 *                     &struct drm_pvr_ioctl_create_context_args.
 * @file: [IN] DRM file private data.
 *
 * Called from userspace with %DRM_IOCTL_PVR_CREATE_CONTEXT.
 *
 * Return:
 *  * 0 on success, or
 *  * -%EINVAL if provided arguments are invalid, or
 *  * -%EFAULT if arguments can't be copied from userspace, or
 *  * Any error returned by pvr_create_render_context().
 */
static int
pvr_ioctl_create_context(struct drm_device *drm_dev, void *raw_args,
			 struct drm_file *file)
{
	struct drm_pvr_ioctl_create_context_args *args = raw_args;
	struct pvr_file *pvr_file = file->driver_priv;
	int idx;
	int ret;

	if (!drm_dev_enter(drm_dev, &idx))
		return -EIO;

	ret = pvr_context_create(pvr_file, args);

	drm_dev_exit(idx);

	return ret;
}

/**
 * pvr_ioctl_destroy_context() - IOCTL to destroy a context
 * @drm_dev: [IN] DRM device.
 * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
 *                     &struct drm_pvr_ioctl_destroy_context_args.
 * @file: [IN] DRM file private data.
 *
 * Called from userspace with %DRM_IOCTL_PVR_DESTROY_CONTEXT.
 *
 * Return:
 *  * 0 on success, or
 *  * -%EINVAL if context not in context list.
 */
static int
pvr_ioctl_destroy_context(struct drm_device *drm_dev, void *raw_args,
			  struct drm_file *file)
{
	struct drm_pvr_ioctl_destroy_context_args *args = raw_args;
	struct pvr_file *pvr_file = file->driver_priv;

	if (args->_padding_4)
		return -EINVAL;

	return pvr_context_destroy(pvr_file, args->handle);
}

/**
 * pvr_ioctl_create_free_list() - IOCTL to create a free list
 * @drm_dev: [IN] DRM device.
 * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
 *                     &struct drm_pvr_ioctl_create_free_list_args.
 * @file: [IN] DRM file private data.
 *
 * Called from userspace with %DRM_IOCTL_PVR_CREATE_FREE_LIST.
 *
 * Return:
 *  * 0 on success, or
 *  * Any error returned by pvr_free_list_create().
 */
static int
pvr_ioctl_create_free_list(struct drm_device *drm_dev, void *raw_args,
			   struct drm_file *file)
{
	struct drm_pvr_ioctl_create_free_list_args *args = raw_args;
	struct pvr_file *pvr_file = to_pvr_file(file);
	struct pvr_free_list *free_list;
	int idx;
	int err;

	if (!drm_dev_enter(drm_dev, &idx))
		return -EIO;

	free_list = pvr_free_list_create(pvr_file, args);
	if (IS_ERR(free_list)) {
		err = PTR_ERR(free_list);
		goto err_drm_dev_exit;
	}

	/* Allocate object handle for userspace. */
	err = xa_alloc(&pvr_file->free_list_handles,
		       &args->handle,
		       free_list,
		       xa_limit_32b,
		       GFP_KERNEL);
	if (err < 0)
		goto err_cleanup;

	drm_dev_exit(idx);

	return 0;

err_cleanup:
	pvr_free_list_put(free_list);

err_drm_dev_exit:
	drm_dev_exit(idx);

	return err;
}

/**
 * pvr_ioctl_destroy_free_list() - IOCTL to destroy a free list
 * @drm_dev: [IN] DRM device.
 * @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
 *                 &struct drm_pvr_ioctl_destroy_free_list_args.
 * @file: [IN] DRM file private data.
 *
 * Called from userspace with %DRM_IOCTL_PVR_DESTROY_FREE_LIST.
 *
 * Return:
 *  * 0 on success, or
 *  * -%EINVAL if free list not in object list.
 */
static int
pvr_ioctl_destroy_free_list(struct drm_device *drm_dev, void *raw_args,
			    struct drm_file *file)
{
	struct drm_pvr_ioctl_destroy_free_list_args *args = raw_args;
	struct pvr_file *pvr_file = to_pvr_file(file);
	struct pvr_free_list *free_list;

	if (args->_padding_4)
		return -EINVAL;

	free_list = xa_erase(&pvr_file->free_list_handles, args->handle);
	if (!free_list)
		return -EINVAL;

	pvr_free_list_put(free_list);
	return 0;
}

/**
 * pvr_ioctl_create_hwrt_dataset() - IOCTL to create a HWRT dataset
 * @drm_dev: [IN] DRM device.
 * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
 *                     &struct drm_pvr_ioctl_create_hwrt_dataset_args.
 * @file: [IN] DRM file private data.
 *
 * Called from userspace with %DRM_IOCTL_PVR_CREATE_HWRT_DATASET.
 *
 * Return:
 *  * 0 on success, or
 *  * Any error returned by pvr_hwrt_dataset_create().
 */
static int
pvr_ioctl_create_hwrt_dataset(struct drm_device *drm_dev, void *raw_args,
			      struct drm_file *file)
{
	struct drm_pvr_ioctl_create_hwrt_dataset_args *args = raw_args;
	struct pvr_file *pvr_file = to_pvr_file(file);
	struct pvr_hwrt_dataset *hwrt;
	int idx;
	int err;

	if (!drm_dev_enter(drm_dev, &idx))
		return -EIO;

	hwrt = pvr_hwrt_dataset_create(pvr_file, args);
	if (IS_ERR(hwrt)) {
		err = PTR_ERR(hwrt);
		goto err_drm_dev_exit;
	}

	/* Allocate object handle for userspace. */
	err = xa_alloc(&pvr_file->hwrt_handles,
		       &args->handle,
		       hwrt,
		       xa_limit_32b,
		       GFP_KERNEL);
	if (err < 0)
		goto err_cleanup;

	drm_dev_exit(idx);

	return 0;

err_cleanup:
	pvr_hwrt_dataset_put(hwrt);

err_drm_dev_exit:
	drm_dev_exit(idx);

	return err;
}

/**
 * pvr_ioctl_destroy_hwrt_dataset() - IOCTL to destroy a HWRT dataset
 * @drm_dev: [IN] DRM device.
 * @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
 *                 &struct drm_pvr_ioctl_destroy_hwrt_dataset_args.
 * @file: [IN] DRM file private data.
 *
 * Called from userspace with %DRM_IOCTL_PVR_DESTROY_HWRT_DATASET.
 *
 * Return:
 *  * 0 on success, or
 *  * -%EINVAL if HWRT dataset not in object list.
 */
static int
pvr_ioctl_destroy_hwrt_dataset(struct drm_device *drm_dev, void *raw_args,
			       struct drm_file *file)
{
	struct drm_pvr_ioctl_destroy_hwrt_dataset_args *args = raw_args;
	struct pvr_file *pvr_file = to_pvr_file(file);
	struct pvr_hwrt_dataset *hwrt;

	if (args->_padding_4)
		return -EINVAL;

	hwrt = xa_erase(&pvr_file->hwrt_handles, args->handle);
	if (!hwrt)
		return -EINVAL;

	pvr_hwrt_dataset_put(hwrt);
	return 0;
}

/**
 * pvr_ioctl_create_vm_context() - IOCTL to create a VM context
 * @drm_dev: [IN] DRM device.
 * @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
 *                     &struct drm_pvr_ioctl_create_vm_context_args.
 * @file: [IN] DRM file private data.
 *
 * Called from userspace with %DRM_IOCTL_PVR_CREATE_VM_CONTEXT.
 *
 * Return:
 *  * 0 on success, or
 *  * Any error returned by pvr_vm_create_context().
 */
static int
pvr_ioctl_create_vm_context(struct drm_device *drm_dev, void *raw_args,
			    struct drm_file *file)
{
	struct drm_pvr_ioctl_create_vm_context_args *args = raw_args;
	struct pvr_file *pvr_file = to_pvr_file(file);
	struct pvr_vm_context *vm_ctx;
	int idx;
	int err;

	if (!drm_dev_enter(drm_dev, &idx))
		return -EIO;

	if (args->_padding_4) {
		err = -EINVAL;
		goto err_drm_dev_exit;
	}

	vm_ctx = pvr_vm_create_context(pvr_file->pvr_dev, true);
	if (IS_ERR(vm_ctx)) {
		err = PTR_ERR(vm_ctx);
		goto err_drm_dev_exit;
	}

	/* Allocate object handle for userspace. */
	err = xa_alloc(&pvr_file->vm_ctx_handles,
		       &args->handle,
		       vm_ctx,
		       xa_limit_32b,
		       GFP_KERNEL);
	if (err < 0)
		goto err_cleanup;

	drm_dev_exit(idx);

	return 0;

err_cleanup:
	pvr_vm_context_put(vm_ctx);

err_drm_dev_exit:
	drm_dev_exit(idx);

	return err;
}

/**
 * pvr_ioctl_destroy_vm_context() - IOCTL to destroy a VM context
* @drm_dev: [IN] DRM device.
* @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
*                 &struct drm_pvr_ioctl_destroy_vm_context_args.
* @file: [IN] DRM file private data.
*
* Called from userspace with %DRM_IOCTL_PVR_DESTROY_VM_CONTEXT.
*
* Return:
*  * 0 on success, or
*  * -%EINVAL if object not in object list.
 */
static int
pvr_ioctl_destroy_vm_context(struct drm_device *drm_dev, void *raw_args,
			     struct drm_file *file)
{
	struct drm_pvr_ioctl_destroy_vm_context_args *args = raw_args;
	struct pvr_file *pvr_file = to_pvr_file(file);
	struct pvr_vm_context *vm_ctx;

	if (args->_padding_4)
		return -EINVAL;

	vm_ctx = xa_erase(&pvr_file->vm_ctx_handles, args->handle);
	if (!vm_ctx)
		return -EINVAL;

	pvr_vm_context_put(vm_ctx);
	return 0;
}

/**
 * pvr_ioctl_vm_map() - IOCTL to map buffer to GPU address space.
 * @drm_dev: [IN] DRM device.
 * @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
 *                 &struct drm_pvr_ioctl_vm_map_args.
 * @file: [IN] DRM file private data.
 *
 * Called from userspace with %DRM_IOCTL_PVR_VM_MAP.
 *
 * Return:
 *  * 0 on success,
 *  * -%EINVAL if &drm_pvr_ioctl_vm_op_map_args.flags is not zero,
 *  * -%EINVAL if the bounds specified by &drm_pvr_ioctl_vm_op_map_args.offset
 *    and &drm_pvr_ioctl_vm_op_map_args.size are not valid or do not fall
 *    within the buffer object specified by
 *    &drm_pvr_ioctl_vm_op_map_args.handle,
 *  * -%EINVAL if the bounds specified by
 *    &drm_pvr_ioctl_vm_op_map_args.device_addr and
 *    &drm_pvr_ioctl_vm_op_map_args.size do not form a valid device-virtual
 *    address range which falls entirely within a single heap, or
 *  * -%ENOENT if &drm_pvr_ioctl_vm_op_map_args.handle does not refer to a
 *    valid PowerVR buffer object.
 */
static int
pvr_ioctl_vm_map(struct drm_device *drm_dev, void *raw_args,
		 struct drm_file *file)
{
	struct pvr_device *pvr_dev = to_pvr_device(drm_dev);
	struct drm_pvr_ioctl_vm_map_args *args = raw_args;
	struct pvr_file *pvr_file = to_pvr_file(file);
	struct pvr_vm_context *vm_ctx;

	struct pvr_gem_object *pvr_obj;
	size_t pvr_obj_size;

	u64 offset_plus_size;
	int idx;
	int err;

	if (!drm_dev_enter(drm_dev, &idx))
		return -EIO;

	/* Initial validation of args. */
	if (args->_padding_14) {
		err = -EINVAL;
		goto err_drm_dev_exit;
	}

	if (args->flags != 0 ||
	    check_add_overflow(args->offset, args->size, &offset_plus_size) ||
	    !pvr_find_heap_containing(pvr_dev, args->device_addr, args->size)) {
		err = -EINVAL;
		goto err_drm_dev_exit;
	}

	vm_ctx = pvr_vm_context_lookup(pvr_file, args->vm_context_handle);
	if (!vm_ctx) {
		err = -EINVAL;
		goto err_drm_dev_exit;
	}

	pvr_obj = pvr_gem_object_from_handle(pvr_file, args->handle);
	if (!pvr_obj) {
		err = -ENOENT;
		goto err_put_vm_context;
	}

	pvr_obj_size = pvr_gem_object_size(pvr_obj);

	/*
	 * Validate offset and size args. The alignment of these will be
	 * checked when mapping; for now just check that they're within valid
	 * bounds
	 */
	if (args->offset >= pvr_obj_size || offset_plus_size > pvr_obj_size) {
		err = -EINVAL;
		goto err_put_pvr_object;
	}

	err = pvr_vm_map(vm_ctx, pvr_obj, args->offset,
			 args->device_addr, args->size);
	if (err)
		goto err_put_pvr_object;

	/*
	 * In order to set up the mapping, we needed a reference to &pvr_obj.
	 * However, pvr_vm_map() obtains and stores its own reference, so we
	 * must release ours before returning.
	 */

err_put_pvr_object:
	pvr_gem_object_put(pvr_obj);

err_put_vm_context:
	pvr_vm_context_put(vm_ctx);

err_drm_dev_exit:
	drm_dev_exit(idx);

	return err;
}

/**
 * pvr_ioctl_vm_unmap() - IOCTL to unmap buffer from GPU address space.
 * @drm_dev: [IN] DRM device.
 * @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
 *                 &struct drm_pvr_ioctl_vm_unmap_args.
 * @file: [IN] DRM file private data.
 *
 * Called from userspace with %DRM_IOCTL_PVR_VM_UNMAP.
 *
 * Return:
 *  * 0 on success,
 *  * -%EINVAL if &drm_pvr_ioctl_vm_op_unmap_args.device_addr is not a valid
 *    device page-aligned device-virtual address, or
 *  * -%ENOENT if there is currently no PowerVR buffer object mapped at
 *    &drm_pvr_ioctl_vm_op_unmap_args.device_addr.
 */
static int
pvr_ioctl_vm_unmap(struct drm_device *drm_dev, void *raw_args,
		   struct drm_file *file)
{
	struct drm_pvr_ioctl_vm_unmap_args *args = raw_args;
	struct pvr_file *pvr_file = to_pvr_file(file);
	struct pvr_vm_context *vm_ctx;
	int err;

	/* Initial validation of args. */
	if (args->_padding_4)
		return -EINVAL;

	vm_ctx = pvr_vm_context_lookup(pvr_file, args->vm_context_handle);
	if (!vm_ctx)
		return -EINVAL;

	err = pvr_vm_unmap(vm_ctx, args->device_addr, args->size);

	pvr_vm_context_put(vm_ctx);

	return err;
}

/*
 * pvr_ioctl_submit_job() - IOCTL to submit a job to the GPU
 * @drm_dev: [IN] DRM device.
 * @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
 *                 &struct drm_pvr_ioctl_submit_job_args.
 * @file: [IN] DRM file private data.
 *
 * Called from userspace with %DRM_IOCTL_PVR_SUBMIT_JOB.
 *
 * Return:
 *  * 0 on success, or
 *  * -%EINVAL if arguments are invalid.
 */
static int
pvr_ioctl_submit_jobs(struct drm_device *drm_dev, void *raw_args,
		      struct drm_file *file)
{
	struct drm_pvr_ioctl_submit_jobs_args *args = raw_args;
	struct pvr_device *pvr_dev = to_pvr_device(drm_dev);
	struct pvr_file *pvr_file = to_pvr_file(file);
	int idx;
	int err;

	if (!drm_dev_enter(drm_dev, &idx))
		return -EIO;

	err = pvr_submit_jobs(pvr_dev, pvr_file, args);

	drm_dev_exit(idx);

	return err;
}

int
pvr_get_uobj(u64 usr_ptr, u32 usr_stride, u32 min_stride, u32 obj_size, void *out)
{
	if (usr_stride < min_stride)
		return -EINVAL;

	return copy_struct_from_user(out, obj_size, u64_to_user_ptr(usr_ptr), usr_stride);
}

int
pvr_set_uobj(u64 usr_ptr, u32 usr_stride, u32 min_stride, u32 obj_size, const void *in)
{
	if (usr_stride < min_stride)
		return -EINVAL;

	if (copy_to_user(u64_to_user_ptr(usr_ptr), in, min_t(u32, usr_stride, obj_size)))
		return -EFAULT;

	if (usr_stride > obj_size &&
	    clear_user(u64_to_user_ptr(usr_ptr + obj_size), usr_stride - obj_size)) {
		return -EFAULT;
	}

	return 0;
}

int
pvr_get_uobj_array(const struct drm_pvr_obj_array *in, u32 min_stride, u32 obj_size, void **out)
{
	int ret = 0;
	void *out_alloc;

	if (in->stride < min_stride)
		return -EINVAL;

	if (!in->count)
		return 0;

	out_alloc = kvmalloc_array(in->count, obj_size, GFP_KERNEL);
	if (!out_alloc)
		return -ENOMEM;

	if (obj_size == in->stride) {
		if (copy_from_user(out_alloc, u64_to_user_ptr(in->array),
				   (unsigned long)obj_size * in->count))
			ret = -EFAULT;
	} else {
		void __user *in_ptr = u64_to_user_ptr(in->array);
		void *out_ptr = out_alloc;

		for (u32 i = 0; i < in->count; i++) {
			ret = copy_struct_from_user(out_ptr, obj_size, in_ptr, in->stride);
			if (ret)
				break;

			out_ptr += obj_size;
			in_ptr += in->stride;
		}
	}

	if (ret) {
		kvfree(out_alloc);
		return ret;
	}

	*out = out_alloc;
	return 0;
}

int
pvr_set_uobj_array(const struct drm_pvr_obj_array *out, u32 min_stride, u32 obj_size,
		   const void *in)
{
	if (out->stride < min_stride)
		return -EINVAL;

	if (!out->count)
		return 0;

	if (obj_size == out->stride) {
		if (copy_to_user(u64_to_user_ptr(out->array), in,
				 (unsigned long)obj_size * out->count))
			return -EFAULT;
	} else {
		u32 cpy_elem_size = min_t(u32, out->stride, obj_size);
		void __user *out_ptr = u64_to_user_ptr(out->array);
		const void *in_ptr = in;

		for (u32 i = 0; i < out->count; i++) {
			if (copy_to_user(out_ptr, in_ptr, cpy_elem_size))
				return -EFAULT;

			out_ptr += obj_size;
			in_ptr += out->stride;
		}

		if (out->stride > obj_size &&
		    clear_user(u64_to_user_ptr(out->array + obj_size),
			       out->stride - obj_size)) {
			return -EFAULT;
		}
	}

	return 0;
}

#define DRM_PVR_IOCTL(_name, _func, _flags) \
	DRM_IOCTL_DEF_DRV(PVR_##_name, pvr_ioctl_##_func, _flags)

/* clang-format off */

static const struct drm_ioctl_desc pvr_drm_driver_ioctls[] = {
	DRM_PVR_IOCTL(DEV_QUERY, dev_query, DRM_RENDER_ALLOW),
	DRM_PVR_IOCTL(CREATE_BO, create_bo, DRM_RENDER_ALLOW),
	DRM_PVR_IOCTL(GET_BO_MMAP_OFFSET, get_bo_mmap_offset, DRM_RENDER_ALLOW),
	DRM_PVR_IOCTL(CREATE_VM_CONTEXT, create_vm_context, DRM_RENDER_ALLOW),
	DRM_PVR_IOCTL(DESTROY_VM_CONTEXT, destroy_vm_context, DRM_RENDER_ALLOW),
	DRM_PVR_IOCTL(VM_MAP, vm_map, DRM_RENDER_ALLOW),
	DRM_PVR_IOCTL(VM_UNMAP, vm_unmap, DRM_RENDER_ALLOW),
	DRM_PVR_IOCTL(CREATE_CONTEXT, create_context, DRM_RENDER_ALLOW),
	DRM_PVR_IOCTL(DESTROY_CONTEXT, destroy_context, DRM_RENDER_ALLOW),
	DRM_PVR_IOCTL(CREATE_FREE_LIST, create_free_list, DRM_RENDER_ALLOW),
	DRM_PVR_IOCTL(DESTROY_FREE_LIST, destroy_free_list, DRM_RENDER_ALLOW),
	DRM_PVR_IOCTL(CREATE_HWRT_DATASET, create_hwrt_dataset, DRM_RENDER_ALLOW),
	DRM_PVR_IOCTL(DESTROY_HWRT_DATASET, destroy_hwrt_dataset, DRM_RENDER_ALLOW),
	DRM_PVR_IOCTL(SUBMIT_JOBS, submit_jobs, DRM_RENDER_ALLOW),
};

/* clang-format on */

#undef DRM_PVR_IOCTL

/**
 * pvr_drm_driver_open() - Driver callback when a new &struct drm_file is opened
 * @drm_dev: [IN] DRM device.
 * @file: [IN] DRM file private data.
 *
 * Allocates powervr-specific file private data (&struct pvr_file).
 *
 * Registered in &pvr_drm_driver.
 *
 * Return:
 *  * 0 on success,
 *  * -%ENOMEM if the allocation of a &struct ipvr_file fails, or
 *  * Any error returned by pvr_memory_context_init().
 */
static int
pvr_drm_driver_open(struct drm_device *drm_dev, struct drm_file *file)
{
	struct pvr_device *pvr_dev = to_pvr_device(drm_dev);
	struct pvr_file *pvr_file;

	pvr_file = kzalloc(sizeof(*pvr_file), GFP_KERNEL);
	if (!pvr_file)
		return -ENOMEM;

	/*
	 * Store reference to base DRM file private data for use by
	 * from_pvr_file.
	 */
	pvr_file->file = file;

	/*
	 * Store reference to powervr-specific outer device struct in file
	 * private data for convenient access.
	 */
	pvr_file->pvr_dev = pvr_dev;

	INIT_LIST_HEAD(&pvr_file->contexts);

	xa_init_flags(&pvr_file->ctx_handles, XA_FLAGS_ALLOC1);
	xa_init_flags(&pvr_file->free_list_handles, XA_FLAGS_ALLOC1);
	xa_init_flags(&pvr_file->hwrt_handles, XA_FLAGS_ALLOC1);
	xa_init_flags(&pvr_file->vm_ctx_handles, XA_FLAGS_ALLOC1);

	/*
	 * Store reference to powervr-specific file private data in DRM file
	 * private data.
	 */
	file->driver_priv = pvr_file;

	return 0;
}

/**
 * pvr_drm_driver_postclose() - One of the driver callbacks when a &struct
 * drm_file is closed.
 * @drm_dev: [IN] DRM device (unused).
 * @file: [IN] DRM file private data.
 *
 * Frees powervr-specific file private data (&struct pvr_file).
 *
 * Registered in &pvr_drm_driver.
 */
static void
pvr_drm_driver_postclose(__always_unused struct drm_device *drm_dev,
			 struct drm_file *file)
{
	struct pvr_file *pvr_file = to_pvr_file(file);

	/* Kill remaining contexts. */
	pvr_destroy_contexts_for_file(pvr_file);

	/* Drop references on any remaining objects. */
	pvr_destroy_free_lists_for_file(pvr_file);
	pvr_destroy_hwrt_datasets_for_file(pvr_file);
	pvr_destroy_vm_contexts_for_file(pvr_file);

	kfree(pvr_file);
	file->driver_priv = NULL;
}

DEFINE_DRM_GEM_FOPS(pvr_drm_driver_fops);

static struct drm_driver pvr_drm_driver = {
	.driver_features = DRIVER_GEM | DRIVER_GEM_GPUVA | DRIVER_RENDER |
			   DRIVER_SYNCOBJ | DRIVER_SYNCOBJ_TIMELINE,
	.open = pvr_drm_driver_open,
	.postclose = pvr_drm_driver_postclose,
	.ioctls = pvr_drm_driver_ioctls,
	.num_ioctls = ARRAY_SIZE(pvr_drm_driver_ioctls),
	.fops = &pvr_drm_driver_fops,
#if defined(CONFIG_DEBUG_FS)
	.debugfs_init = pvr_debugfs_init,
#endif

	.name = PVR_DRIVER_NAME,
	.desc = PVR_DRIVER_DESC,
	.date = PVR_DRIVER_DATE,
	.major = PVR_DRIVER_MAJOR,
	.minor = PVR_DRIVER_MINOR,
	.patchlevel = PVR_DRIVER_PATCHLEVEL,

	.gem_prime_import_sg_table = drm_gem_shmem_prime_import_sg_table,
	.gem_create_object = pvr_gem_create_object,
};

static int
pvr_probe(struct platform_device *plat_dev)
{
	struct pvr_device *pvr_dev;
	struct drm_device *drm_dev;
	int err;

	pvr_dev = devm_drm_dev_alloc(&plat_dev->dev, &pvr_drm_driver,
				     struct pvr_device, base);
	if (IS_ERR(pvr_dev))
		return PTR_ERR(pvr_dev);

	drm_dev = &pvr_dev->base;

	platform_set_drvdata(plat_dev, drm_dev);

	init_rwsem(&pvr_dev->reset_sem);

	pvr_context_device_init(pvr_dev);

	err = pvr_queue_device_init(pvr_dev);
	if (err)
		goto err_context_fini;

	devm_pm_runtime_enable(&plat_dev->dev);
	pm_runtime_mark_last_busy(&plat_dev->dev);

	pm_runtime_set_autosuspend_delay(&plat_dev->dev, 50);
	pm_runtime_use_autosuspend(&plat_dev->dev);
	pvr_watchdog_init(pvr_dev);

	err = pvr_device_init(pvr_dev);
	if (err)
		goto err_watchdog_fini;

	err = drm_dev_register(drm_dev, 0);
	if (err)
		goto err_device_fini;

	xa_init_flags(&pvr_dev->free_list_ids, XA_FLAGS_ALLOC1);
	xa_init_flags(&pvr_dev->job_ids, XA_FLAGS_ALLOC1);

	return 0;

err_device_fini:
	pvr_device_fini(pvr_dev);

err_watchdog_fini:
	pvr_watchdog_fini(pvr_dev);

	pvr_queue_device_fini(pvr_dev);

err_context_fini:
	pvr_context_device_fini(pvr_dev);

	return err;
}

static void pvr_remove(struct platform_device *plat_dev)
{
	struct drm_device *drm_dev = platform_get_drvdata(plat_dev);
	struct pvr_device *pvr_dev = to_pvr_device(drm_dev);

	WARN_ON(!xa_empty(&pvr_dev->job_ids));
	WARN_ON(!xa_empty(&pvr_dev->free_list_ids));

	xa_destroy(&pvr_dev->job_ids);
	xa_destroy(&pvr_dev->free_list_ids);

	pm_runtime_suspend(drm_dev->dev);
	pvr_device_fini(pvr_dev);
	drm_dev_unplug(drm_dev);
	pvr_watchdog_fini(pvr_dev);
	pvr_queue_device_fini(pvr_dev);
	pvr_context_device_fini(pvr_dev);
}

static const struct of_device_id dt_match[] = {
	{ .compatible = "img,img-axe", .data = NULL },
	{}
};
MODULE_DEVICE_TABLE(of, dt_match);

static const struct dev_pm_ops pvr_pm_ops = {
	RUNTIME_PM_OPS(pvr_power_device_suspend, pvr_power_device_resume, pvr_power_device_idle)
};

static struct platform_driver pvr_driver = {
	.probe = pvr_probe,
	.remove_new = pvr_remove,
	.driver = {
		.name = PVR_DRIVER_NAME,
		.pm = &pvr_pm_ops,
		.of_match_table = dt_match,
	},
};
module_platform_driver(pvr_driver);

MODULE_AUTHOR("Imagination Technologies Ltd.");
MODULE_DESCRIPTION(PVR_DRIVER_DESC);
MODULE_LICENSE("Dual MIT/GPL");
MODULE_IMPORT_NS(DMA_BUF);
MODULE_FIRMWARE("powervr/rogue_33.15.11.3_v1.fw");