aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/enic/base/vnic_dev.c
blob: 9b25d219c8a25923153910a9e227f6b9173b2535 (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
/*
 * Copyright 2008-2014 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 *
 * Copyright (c) 2014, Cisco Systems, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in
 * the documentation and/or other materials provided with the
 * distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 */

#include <rte_memzone.h>
#include <rte_memcpy.h>
#include <rte_string_fns.h>

#include "vnic_dev.h"
#include "vnic_resource.h"
#include "vnic_devcmd.h"
#include "vnic_stats.h"


enum vnic_proxy_type {
	PROXY_NONE,
	PROXY_BY_BDF,
	PROXY_BY_INDEX,
};

struct vnic_res {
	void __iomem *vaddr;
	dma_addr_t bus_addr;
	unsigned int count;
};

struct vnic_intr_coal_timer_info {
	u32 mul;
	u32 div;
	u32 max_usec;
};

struct vnic_dev {
	void *priv;
	struct rte_pci_device *pdev;
	struct vnic_res res[RES_TYPE_MAX];
	enum vnic_dev_intr_mode intr_mode;
	struct vnic_devcmd __iomem *devcmd;
	struct vnic_devcmd_notify *notify;
	struct vnic_devcmd_notify notify_copy;
	dma_addr_t notify_pa;
	u32 notify_sz;
	dma_addr_t linkstatus_pa;
	struct vnic_stats *stats;
	dma_addr_t stats_pa;
	struct vnic_devcmd_fw_info *fw_info;
	dma_addr_t fw_info_pa;
	enum vnic_proxy_type proxy;
	u32 proxy_index;
	u64 args[VNIC_DEVCMD_NARGS];
	u16 split_hdr_size;
	int in_reset;
	struct vnic_intr_coal_timer_info intr_coal_timer_info;
	void *(*alloc_consistent)(void *priv, size_t size,
		dma_addr_t *dma_handle, u8 *name);
	void (*free_consistent)(void *priv,
		size_t size, void *vaddr,
		dma_addr_t dma_handle);
};

#define VNIC_MAX_RES_HDR_SIZE \
	(sizeof(struct vnic_resource_header) + \
	sizeof(struct vnic_resource) * RES_TYPE_MAX)
#define VNIC_RES_STRIDE	128

void *vnic_dev_priv(struct vnic_dev *vdev)
{
	return vdev->priv;
}

void vnic_register_cbacks(struct vnic_dev *vdev,
	void *(*alloc_consistent)(void *priv, size_t size,
	    dma_addr_t *dma_handle, u8 *name),
	void (*free_consistent)(void *priv,
	    size_t size, void *vaddr,
	    dma_addr_t dma_handle))
{
	vdev->alloc_consistent = alloc_consistent;
	vdev->free_consistent = free_consistent;
}

static int vnic_dev_discover_res(struct vnic_dev *vdev,
	struct vnic_dev_bar *bar, unsigned int num_bars)
{
	struct vnic_resource_header __iomem *rh;
	struct mgmt_barmap_hdr __iomem *mrh;
	struct vnic_resource __iomem *r;
	u8 type;

	if (num_bars == 0)
		return -EINVAL;

	if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
		pr_err("vNIC BAR0 res hdr length error\n");
		return -EINVAL;
	}

	rh  = bar->vaddr;
	mrh = bar->vaddr;
	if (!rh) {
		pr_err("vNIC BAR0 res hdr not mem-mapped\n");
		return -EINVAL;
	}

	/* Check for mgmt vnic in addition to normal vnic */
	if ((ioread32(&rh->magic) != VNIC_RES_MAGIC) ||
		(ioread32(&rh->version) != VNIC_RES_VERSION)) {
		if ((ioread32(&mrh->magic) != MGMTVNIC_MAGIC) ||
			(ioread32(&mrh->version) != MGMTVNIC_VERSION)) {
			pr_err("vNIC BAR0 res magic/version error " \
				"exp (%lx/%lx) or (%lx/%lx), curr (%x/%x)\n",
				VNIC_RES_MAGIC, VNIC_RES_VERSION,
				MGMTVNIC_MAGIC, MGMTVNIC_VERSION,
				ioread32(&rh->magic), ioread32(&rh->version));
			return -EINVAL;
		}
	}

	if (ioread32(&mrh->magic) == MGMTVNIC_MAGIC)
		r = (struct vnic_resource __iomem *)(mrh + 1);
	else
		r = (struct vnic_resource __iomem *)(rh + 1);


	while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
		u8 bar_num = ioread8(&r->bar);
		u32 bar_offset = ioread32(&r->bar_offset);
		u32 count = ioread32(&r->count);
		u32 len;

		r++;

		if (bar_num >= num_bars)
			continue;

		if (!bar[bar_num].len || !bar[bar_num].vaddr)
			continue;

		switch (type) {
		case RES_TYPE_WQ:
		case RES_TYPE_RQ:
		case RES_TYPE_CQ:
		case RES_TYPE_INTR_CTRL:
			/* each count is stride bytes long */
			len = count * VNIC_RES_STRIDE;
			if (len + bar_offset > bar[bar_num].len) {
				pr_err("vNIC BAR0 resource %d " \
					"out-of-bounds, offset 0x%x + " \
					"size 0x%x > bar len 0x%lx\n",
					type, bar_offset,
					len,
					bar[bar_num].len);
				return -EINVAL;
			}
			break;
		case RES_TYPE_INTR_PBA_LEGACY:
		case RES_TYPE_DEVCMD:
			len = count;
			break;
		default:
			continue;
		}

		vdev->res[type].count = count;
		vdev->res[type].vaddr = (char __iomem *)bar[bar_num].vaddr +
		    bar_offset;
		vdev->res[type].bus_addr = bar[bar_num].bus_addr + bar_offset;
	}

	return 0;
}

unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
	enum vnic_res_type type)
{
	return vdev->res[type].count;
}

void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
	unsigned int index)
{
	if (!vdev->res[type].vaddr)
		return NULL;

	switch (type) {
	case RES_TYPE_WQ:
	case RES_TYPE_RQ:
	case RES_TYPE_CQ:
	case RES_TYPE_INTR_CTRL:
		return (char __iomem *)vdev->res[type].vaddr +
			index * VNIC_RES_STRIDE;
	default:
		return (char __iomem *)vdev->res[type].vaddr;
	}
}

unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
	unsigned int desc_count, unsigned int desc_size)
{
	/* The base address of the desc rings must be 512 byte aligned.
	 * Descriptor count is aligned to groups of 32 descriptors.  A
	 * count of 0 means the maximum 4096 descriptors.  Descriptor
	 * size is aligned to 16 bytes.
	 */

	unsigned int count_align = 32;
	unsigned int desc_align = 16;

	ring->base_align = 512;

	if (desc_count == 0)
		desc_count = 4096;

	ring->desc_count = VNIC_ALIGN(desc_count, count_align);

	ring->desc_size = VNIC_ALIGN(desc_size, desc_align);

	ring->size = ring->desc_count * ring->desc_size;
	ring->size_unaligned = ring->size + ring->base_align;

	return ring->size_unaligned;
}

void vnic_set_hdr_split_size(struct vnic_dev *vdev, u16 size)
{
	vdev->split_hdr_size = size;
}

u16 vnic_get_hdr_split_size(struct vnic_dev *vdev)
{
	return vdev->split_hdr_size;
}

void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
{
	memset(ring->descs, 0, ring->size);
}

int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev,
	struct vnic_dev_ring *ring,
	unsigned int desc_count, unsigned int desc_size,
	__attribute__((unused)) unsigned int socket_id,
	char *z_name)
{
	void *alloc_addr;
	dma_addr_t alloc_pa = 0;

	vnic_dev_desc_ring_size(ring, desc_count, desc_size);
	alloc_addr = vdev->alloc_consistent(vdev->priv,
					    ring->size_unaligned,
					    &alloc_pa, (u8 *)z_name);
	if (!alloc_addr) {
		pr_err("Failed to allocate ring (size=%d), aborting\n",
			(int)ring->size);
		return -ENOMEM;
	}
	ring->descs_unaligned = alloc_addr;
	if (!alloc_pa) {
		pr_err("Failed to map allocated ring (size=%d), aborting\n",
			(int)ring->size);
		vdev->free_consistent(vdev->priv,
				      ring->size_unaligned,
				      alloc_addr,
				      alloc_pa);
		return -ENOMEM;
	}
	ring->base_addr_unaligned = alloc_pa;

	ring->base_addr = VNIC_ALIGN(ring->base_addr_unaligned,
		ring->base_align);
	ring->descs = (u8 *)ring->descs_unaligned +
	    (ring->base_addr - ring->base_addr_unaligned);

	vnic_dev_clear_desc_ring(ring);

	ring->desc_avail = ring->desc_count - 1;

	return 0;
}

void vnic_dev_free_desc_ring(__attribute__((unused))  struct vnic_dev *vdev,
	struct vnic_dev_ring *ring)
{
	if (ring->descs) {
		vdev->free_consistent(vdev->priv,
				      ring->size_unaligned,
				      ring->descs_unaligned,
				      ring->base_addr_unaligned);
		ring->descs = NULL;
	}
}

static int _vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
	int wait)
{
	struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
	unsigned int i;
	int delay;
	u32 status;
	int err;

	status = ioread32(&devcmd->status);
	if (status == 0xFFFFFFFF) {
		/* PCI-e target device is gone */
		return -ENODEV;
	}
	if (status & STAT_BUSY) {

		pr_err("Busy devcmd %d\n",  _CMD_N(cmd));
		return -EBUSY;
	}

	if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
		for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
			writeq(vdev->args[i], &devcmd->args[i]);
		wmb(); /* complete all writes initiated till now */
	}

	iowrite32(cmd, &devcmd->cmd);

	if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
		return 0;

	for (delay = 0; delay < wait; delay++) {

		udelay(100);

		status = ioread32(&devcmd->status);
		if (status == 0xFFFFFFFF) {
			/* PCI-e target device is gone */
			return -ENODEV;
		}

		if (!(status & STAT_BUSY)) {
			if (status & STAT_ERROR) {
				err = -(int)readq(&devcmd->args[0]);
				if (cmd != CMD_CAPABILITY)
					pr_err("Devcmd %d failed " \
						"with error code %d\n",
						_CMD_N(cmd), err);
				return err;
			}

			if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
				rmb();/* finish all reads initiated till now */
				for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
					vdev->args[i] = readq(&devcmd->args[i]);
			}

			return 0;
		}
	}

	pr_err("Timedout devcmd %d\n", _CMD_N(cmd));
	return -ETIMEDOUT;
}

static int vnic_dev_cmd_proxy(struct vnic_dev *vdev,
	enum vnic_devcmd_cmd proxy_cmd, enum vnic_devcmd_cmd cmd,
	u64 *args, int nargs, int wait)
{
	u32 status;
	int err;

	/*
	 * Proxy command consumes 2 arguments. One for proxy index,
	 * the other is for command to be proxied
	 */
	if (nargs > VNIC_DEVCMD_NARGS - 2) {
		pr_err("number of args %d exceeds the maximum\n", nargs);
		return -EINVAL;
	}
	memset(vdev->args, 0, sizeof(vdev->args));

	vdev->args[0] = vdev->proxy_index;
	vdev->args[1] = cmd;
	memcpy(&vdev->args[2], args, nargs * sizeof(args[0]));

	err = _vnic_dev_cmd(vdev, proxy_cmd, wait);
	if (err)
		return err;

	status = (u32)vdev->args[0];
	if (status & STAT_ERROR) {
		err = (int)vdev->args[1];
		if (err != ERR_ECMDUNKNOWN ||
		    cmd != CMD_CAPABILITY)
			pr_err("Error %d proxy devcmd %d\n", err, _CMD_N(cmd));
		return err;
	}

	memcpy(args, &vdev->args[1], nargs * sizeof(args[0]));

	return 0;
}

static int vnic_dev_cmd_no_proxy(struct vnic_dev *vdev,
	enum vnic_devcmd_cmd cmd, u64 *args, int nargs, int wait)
{
	int err;

	if (nargs > VNIC_DEVCMD_NARGS) {
		pr_err("number of args %d exceeds the maximum\n", nargs);
		return -EINVAL;
	}
	memset(vdev->args, 0, sizeof(vdev->args));
	memcpy(vdev->args, args, nargs * sizeof(args[0]));

	err = _vnic_dev_cmd(vdev, cmd, wait);

	memcpy(args, vdev->args, nargs * sizeof(args[0]));

	return err;
}

int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
	u64 *a0, u64 *a1, int wait)
{
	u64 args[2];
	int err;

	args[0] = *a0;
	args[1] = *a1;
	memset(vdev->args, 0, sizeof(vdev->args));

	switch (vdev->proxy) {
	case PROXY_BY_INDEX:
		err =  vnic_dev_cmd_proxy(vdev, CMD_PROXY_BY_INDEX, cmd,
				args, ARRAY_SIZE(args), wait);
		break;
	case PROXY_BY_BDF:
		err =  vnic_dev_cmd_proxy(vdev, CMD_PROXY_BY_BDF, cmd,
				args, ARRAY_SIZE(args), wait);
		break;
	case PROXY_NONE:
	default:
		err = vnic_dev_cmd_no_proxy(vdev, cmd, args, 2, wait);
		break;
	}

	if (err == 0) {
		*a0 = args[0];
		*a1 = args[1];
	}

	return err;
}

int vnic_dev_cmd_args(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
		      u64 *args, int nargs, int wait)
{
	switch (vdev->proxy) {
	case PROXY_BY_INDEX:
		return vnic_dev_cmd_proxy(vdev, CMD_PROXY_BY_INDEX, cmd,
				args, nargs, wait);
	case PROXY_BY_BDF:
		return vnic_dev_cmd_proxy(vdev, CMD_PROXY_BY_BDF, cmd,
				args, nargs, wait);
	case PROXY_NONE:
	default:
		return vnic_dev_cmd_no_proxy(vdev, cmd, args, nargs, wait);
	}
}

static int vnic_dev_advanced_filters_cap(struct vnic_dev *vdev, u64 *args,
		int nargs)
{
	memset(args, 0, nargs * sizeof(*args));
	args[0] = CMD_ADD_ADV_FILTER;
	args[1] = FILTER_CAP_MODE_V1_FLAG;
	return vnic_dev_cmd_args(vdev, CMD_CAPABILITY, args, nargs, 1000);
}

int vnic_dev_capable_adv_filters(struct vnic_dev *vdev)
{
	u64 a0 = CMD_ADD_ADV_FILTER, a1 = 0;
	int wait = 1000;
	int err;

	err = vnic_dev_cmd(vdev, CMD_CAPABILITY, &a0, &a1, wait);
	if (err)
		return 0;
	return (a1 >= (u32)FILTER_DPDK_1);
}

/*  Determine the "best" filtering mode VIC is capaible of. Returns one of 3
 *  value or 0 on error:
 *	FILTER_DPDK_1- advanced filters availabile
 *	FILTER_USNIC_IP_FLAG - advanced filters but with the restriction that
 *		the IP layer must explicitly specified. I.e. cannot have a UDP
 *		filter that matches both IPv4 and IPv6.
 *	FILTER_IPV4_5TUPLE - fallback if either of the 2 above aren't available.
 *		all other filter types are not available.
 *   Retrun true in filter_tags if supported
 */
int vnic_dev_capable_filter_mode(struct vnic_dev *vdev, u32 *mode,
				 u8 *filter_tags)
{
	u64 args[4];
	int err;
	u32 max_level = 0;

	err = vnic_dev_advanced_filters_cap(vdev, args, 4);

	/* determine if filter tags are available */
	if (err)
		*filter_tags = 0;
	if ((args[2] == FILTER_CAP_MODE_V1) &&
	    (args[3] & FILTER_ACTION_FILTER_ID_FLAG))
		*filter_tags = 1;
	else
		*filter_tags = 0;

	if (err || ((args[0] == 1) && (args[1] == 0))) {
		/* Adv filter Command not supported or adv filters available but
		 * not enabled. Try the normal filter capability command.
		 */
		args[0] = CMD_ADD_FILTER;
		args[1] = 0;
		err = vnic_dev_cmd_args(vdev, CMD_CAPABILITY, args, 2, 1000);
		if (err)
			return err;
		max_level = args[1];
		goto parse_max_level;
	} else if (args[2] == FILTER_CAP_MODE_V1) {
		/* parse filter capability mask in args[1] */
		if (args[1] & FILTER_DPDK_1_FLAG)
			*mode = FILTER_DPDK_1;
		else if (args[1] & FILTER_USNIC_IP_FLAG)
			*mode = FILTER_USNIC_IP;
		else if (args[1] & FILTER_IPV4_5TUPLE_FLAG)
			*mode = FILTER_IPV4_5TUPLE;
		return 0;
	}
	max_level = args[1];
parse_max_level:
	if (max_level >= (u32)FILTER_USNIC_IP)
		*mode = FILTER_USNIC_IP;
	else
		*mode = FILTER_IPV4_5TUPLE;
	return 0;
}

int vnic_dev_capable(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd)
{
	u64 a0 = (u32)cmd, a1 = 0;
	int wait = 1000;
	int err;

	err = vnic_dev_cmd(vdev, CMD_CAPABILITY, &a0, &a1, wait);

	return !(err || a0);
}

int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, size_t size,
	void *value)
{
	u64 a0, a1;
	int wait = 1000;
	int err;

	a0 = offset;
	a1 = size;

	err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);

	switch (size) {
	case 1:
		*(u8 *)value = (u8)a0;
		break;
	case 2:
		*(u16 *)value = (u16)a0;
		break;
	case 4:
		*(u32 *)value = (u32)a0;
		break;
	case 8:
		*(u64 *)value = a0;
		break;
	default:
		BUG();
		break;
	}

	return err;
}

int vnic_dev_stats_clear(struct vnic_dev *vdev)
{
	u64 a0 = 0, a1 = 0;
	int wait = 1000;

	return vnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait);
}

int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
{
	u64 a0, a1;
	int wait = 1000;
	static u32 instance;
	char name[NAME_MAX];

	if (!vdev->stats) {
		snprintf((char *)name, sizeof(name),
			"vnic_stats-%u", instance++);
		vdev->stats = vdev->alloc_consistent(vdev->priv,
			sizeof(struct vnic_stats), &vdev->stats_pa, (u8 *)name);
		if (!vdev->stats)
			return -ENOMEM;
	}

	*stats = vdev->stats;
	a0 = vdev->stats_pa;
	a1 = sizeof(struct vnic_stats);

	return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
}

int vnic_dev_close(struct vnic_dev *vdev)
{
	u64 a0 = 0, a1 = 0;
	int wait = 1000;

	return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
}

int vnic_dev_enable_wait(struct vnic_dev *vdev)
{
	u64 a0 = 0, a1 = 0;
	int wait = 1000;

	if (vnic_dev_capable(vdev, CMD_ENABLE_WAIT))
		return vnic_dev_cmd(vdev, CMD_ENABLE_WAIT, &a0, &a1, wait);
	else
		return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
}

int vnic_dev_disable(struct vnic_dev *vdev)
{
	u64 a0 = 0, a1 = 0;
	int wait = 1000;

	return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
}

int vnic_dev_open(struct vnic_dev *vdev, int arg)
{
	u64 a0 = (u32)arg, a1 = 0;
	int wait = 1000;

	return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
}

int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
{
	u64 a0 = 0, a1 = 0;
	int wait = 1000;
	int err;

	*done = 0;

	err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
	if (err)
		return err;

	*done = (a0 == 0);

	return 0;
}

int vnic_dev_get_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
{
	u64 a0 = 0, a1 = 0;
	int wait = 1000;
	int err, i;

	for (i = 0; i < ETH_ALEN; i++)
		mac_addr[i] = 0;

	err = vnic_dev_cmd(vdev, CMD_GET_MAC_ADDR, &a0, &a1, wait);
	if (err)
		return err;

	for (i = 0; i < ETH_ALEN; i++)
		mac_addr[i] = ((u8 *)&a0)[i];

	return 0;
}

int vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
	int broadcast, int promisc, int allmulti)
{
	u64 a0, a1 = 0;
	int wait = 1000;
	int err;

	a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
	     (multicast ? CMD_PFILTER_MULTICAST : 0) |
	     (broadcast ? CMD_PFILTER_BROADCAST : 0) |
	     (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
	     (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);

	err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
	if (err)
		pr_err("Can't set packet filter\n");

	return err;
}

int vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
{
	u64 a0 = 0, a1 = 0;
	int wait = 1000;
	int err;
	int i;

	for (i = 0; i < ETH_ALEN; i++)
		((u8 *)&a0)[i] = addr[i];

	err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
	if (err)
		pr_err("Can't add addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
			addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
			err);

	return err;
}

int vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
{
	u64 a0 = 0, a1 = 0;
	int wait = 1000;
	int err;
	int i;

	for (i = 0; i < ETH_ALEN; i++)
		((u8 *)&a0)[i] = addr[i];

	err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
	if (err)
		pr_err("Can't del addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
			addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
			err);

	return err;
}

int vnic_dev_set_ig_vlan_rewrite_mode(struct vnic_dev *vdev,
	u8 ig_vlan_rewrite_mode)
{
	u64 a0 = ig_vlan_rewrite_mode, a1 = 0;
	int wait = 1000;

	if (vnic_dev_capable(vdev, CMD_IG_VLAN_REWRITE_MODE))
		return vnic_dev_cmd(vdev, CMD_IG_VLAN_REWRITE_MODE,
				&a0, &a1, wait);
	else
		return 0;
}

void vnic_dev_set_reset_flag(struct vnic_dev *vdev, int state)
{
	vdev->in_reset = state;
}

static inline int vnic_dev_in_reset(struct vnic_dev *vdev)
{
	return vdev->in_reset;
}

int vnic_dev_notify_setcmd(struct vnic_dev *vdev,
	void *notify_addr, dma_addr_t notify_pa, u16 intr)
{
	u64 a0, a1;
	int wait = 1000;
	int r;

	memset(notify_addr, 0, sizeof(struct vnic_devcmd_notify));
	if (!vnic_dev_in_reset(vdev)) {
		vdev->notify = notify_addr;
		vdev->notify_pa = notify_pa;
	}

	a0 = (u64)notify_pa;
	a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
	a1 += sizeof(struct vnic_devcmd_notify);

	r = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
	if (!vnic_dev_in_reset(vdev))
		vdev->notify_sz = (r == 0) ? (u32)a1 : 0;

	return r;
}

int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
{
	void *notify_addr = NULL;
	dma_addr_t notify_pa = 0;
	char name[NAME_MAX];
	static u32 instance;

	if (vdev->notify || vdev->notify_pa) {
		return vnic_dev_notify_setcmd(vdev, vdev->notify,
					      vdev->notify_pa, intr);
	}
	if (!vnic_dev_in_reset(vdev)) {
		snprintf((char *)name, sizeof(name),
			"vnic_notify-%u", instance++);
		notify_addr = vdev->alloc_consistent(vdev->priv,
			sizeof(struct vnic_devcmd_notify),
			&notify_pa, (u8 *)name);
		if (!notify_addr)
			return -ENOMEM;
	}

	return vnic_dev_notify_setcmd(vdev, notify_addr, notify_pa, intr);
}

int vnic_dev_notify_unsetcmd(struct vnic_dev *vdev)
{
	u64 a0, a1;
	int wait = 1000;
	int err;

	a0 = 0;  /* paddr = 0 to unset notify buffer */
	a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
	a1 += sizeof(struct vnic_devcmd_notify);

	err = vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
	if (!vnic_dev_in_reset(vdev)) {
		vdev->notify = NULL;
		vdev->notify_pa = 0;
		vdev->notify_sz = 0;
	}

	return err;
}

int vnic_dev_notify_unset(struct vnic_dev *vdev)
{
	if (vdev->notify && !vnic_dev_in_reset(vdev)) {
		vdev->free_consistent(vdev->priv,
			sizeof(struct vnic_devcmd_notify),
			vdev->notify,
			vdev->notify_pa);
	}

	return vnic_dev_notify_unsetcmd(vdev);
}

static int vnic_dev_notify_ready(struct vnic_dev *vdev)
{
	u32 *words;
	unsigned int nwords = vdev->notify_sz / 4;
	unsigned int i;
	u32 csum;

	if (!vdev->notify || !vdev->notify_sz)
		return 0;

	do {
		csum = 0;
		rte_memcpy(&vdev->notify_copy, vdev->notify, vdev->notify_sz);
		words = (u32 *)&vdev->notify_copy;
		for (i = 1; i < nwords; i++)
			csum += words[i];
	} while (csum != words[0]);

	return 1;
}

int vnic_dev_init(struct vnic_dev *vdev, int arg)
{
	u64 a0 = (u32)arg, a1 = 0;
	int wait = 1000;
	int r = 0;

	if (vnic_dev_capable(vdev, CMD_INIT))
		r = vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
	else {
		vnic_dev_cmd(vdev, CMD_INIT_v1, &a0, &a1, wait);
		if (a0 & CMD_INITF_DEFAULT_MAC) {
			/* Emulate these for old CMD_INIT_v1 which
			 * didn't pass a0 so no CMD_INITF_*.
			 */
			vnic_dev_cmd(vdev, CMD_GET_MAC_ADDR, &a0, &a1, wait);
			vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
		}
	}
	return r;
}

void vnic_dev_intr_coal_timer_info_default(struct vnic_dev *vdev)
{
	/* Default: hardware intr coal timer is in units of 1.5 usecs */
	vdev->intr_coal_timer_info.mul = 2;
	vdev->intr_coal_timer_info.div = 3;
	vdev->intr_coal_timer_info.max_usec =
		vnic_dev_intr_coal_timer_hw_to_usec(vdev, 0xffff);
}

int vnic_dev_link_status(struct vnic_dev *vdev)
{
	if (!vnic_dev_notify_ready(vdev))
		return 0;

	return vdev->notify_copy.link_state;
}

u32 vnic_dev_port_speed(struct vnic_dev *vdev)
{
	if (!vnic_dev_notify_ready(vdev))
		return 0;

	return vdev->notify_copy.port_speed;
}

u32 vnic_dev_intr_coal_timer_usec_to_hw(struct vnic_dev *vdev, u32 usec)
{
	return (usec * vdev->intr_coal_timer_info.mul) /
		vdev->intr_coal_timer_info.div;
}

u32 vnic_dev_intr_coal_timer_hw_to_usec(struct vnic_dev *vdev, u32 hw_cycles)
{
	return (hw_cycles * vdev->intr_coal_timer_info.div) /
		vdev->intr_coal_timer_info.mul;
}

u32 vnic_dev_get_intr_coal_timer_max(struct vnic_dev *vdev)
{
	return vdev->intr_coal_timer_info.max_usec;
}

void vnic_dev_unregister(struct vnic_dev *vdev)
{
	if (vdev) {
		if (vdev->notify)
			vdev->free_consistent(vdev->priv,
				sizeof(struct vnic_devcmd_notify),
				vdev->notify,
				vdev->notify_pa);
		if (vdev->stats)
			vdev->free_consistent(vdev->priv,
				sizeof(struct vnic_stats),
				vdev->stats, vdev->stats_pa);
		if (vdev->fw_info)
			vdev->free_consistent(vdev->priv,
				sizeof(struct vnic_devcmd_fw_info),
				vdev->fw_info, vdev->fw_info_pa);
		rte_free(vdev);
	}
}

struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
	void *priv, struct rte_pci_device *pdev, struct vnic_dev_bar *bar,
	unsigned int num_bars)
{
	if (!vdev) {
		char name[NAME_MAX];
		snprintf((char *)name, sizeof(name), "%s-vnic",
			  pdev->device.name);
		vdev = (struct vnic_dev *)rte_zmalloc_socket(name,
					sizeof(struct vnic_dev),
					RTE_CACHE_LINE_SIZE,
					pdev->device.numa_node);
		if (!vdev)
			return NULL;
	}

	vdev->priv = priv;
	vdev->pdev = pdev;

	if (vnic_dev_discover_res(vdev, bar, num_bars))
		goto err_out;

	vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
	if (!vdev->devcmd)
		goto err_out;

	return vdev;

err_out:
	vnic_dev_unregister(vdev);
	return NULL;
}

/*
 *  vnic_dev_classifier: Add/Delete classifier entries
 *  @vdev: vdev of the device
 *  @cmd: CLSF_ADD for Add filter
 *        CLSF_DEL for Delete filter
 *  @entry: In case of ADD filter, the caller passes the RQ number in this
 *          variable.
 *          This function stores the filter_id returned by the
 *          firmware in the same variable before return;
 *
 *          In case of DEL filter, the caller passes the RQ number. Return
 *          value is irrelevant.
 * @data: filter data
 * @action: action data
 */
int vnic_dev_classifier(struct vnic_dev *vdev, u8 cmd, u16 *entry,
	struct filter_v2 *data, struct filter_action_v2 *action_v2)
{
	u64 a0 = 0, a1 = 0;
	int wait = 1000;
	dma_addr_t tlv_pa;
	int ret = -EINVAL;
	struct filter_tlv *tlv, *tlv_va;
	u64 tlv_size;
	u32 filter_size, action_size;
	static unsigned int unique_id;
	char z_name[RTE_MEMZONE_NAMESIZE];
	enum vnic_devcmd_cmd dev_cmd;

	if (cmd == CLSF_ADD) {
		dev_cmd = (data->type >= FILTER_DPDK_1) ?
			  CMD_ADD_ADV_FILTER : CMD_ADD_FILTER;

		filter_size = vnic_filter_size(data);
		action_size = vnic_action_size(action_v2);

		tlv_size = filter_size + action_size +
		    2*sizeof(struct filter_tlv);
		snprintf((char *)z_name, sizeof(z_name),
			"vnic_clsf_%u", unique_id++);
		tlv_va = vdev->alloc_consistent(vdev->priv,
			tlv_size, &tlv_pa, (u8 *)z_name);
		if (!tlv_va)
			return -ENOMEM;
		tlv = tlv_va;
		a0 = tlv_pa;
		a1 = tlv_size;
		memset(tlv, 0, tlv_size);
		tlv->type = CLSF_TLV_FILTER;
		tlv->length = filter_size;
		memcpy(&tlv->val, (void *)data, filter_size);

		tlv = (struct filter_tlv *)((char *)tlv +
					 sizeof(struct filter_tlv) +
					 filter_size);

		tlv->type = CLSF_TLV_ACTION;
		tlv->length = action_size;
		memcpy(&tlv->val, (void *)action_v2, action_size);
		ret = vnic_dev_cmd(vdev, dev_cmd, &a0, &a1, wait);
		*entry = (u16)a0;
		vdev->free_consistent(vdev->priv, tlv_size, tlv_va, tlv_pa);
	} else if (cmd == CLSF_DEL) {
		a0 = *entry;
		ret = vnic_dev_cmd(vdev, CMD_DEL_FILTER, &a0, &a1, wait);
	}

	return ret;
}