summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/intel/ixgbevf/vf.c
blob: 38d3a327c1bc9cdc641015b5c71dfe003d9284a0 (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
/*******************************************************************************

  Intel 82599 Virtual Function driver
  Copyright(c) 1999 - 2015 Intel Corporation.

  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.

  This program is distributed in the hope it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  more details.

  You should have received a copy of the GNU General Public License along with
  this program; if not, see <http://www.gnu.org/licenses/>.

  The full GNU General Public License is included in this distribution in
  the file called "COPYING".

  Contact Information:
  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

*******************************************************************************/

#include "vf.h"
#include "ixgbevf.h"

/* On Hyper-V, to reset, we need to read from this offset
 * from the PCI config space. This is the mechanism used on
 * Hyper-V to support PF/VF communication.
 */
#define IXGBE_HV_RESET_OFFSET           0x201

static inline s32 ixgbevf_write_msg_read_ack(struct ixgbe_hw *hw, u32 *msg,
					     u32 *retmsg, u16 size)
{
	struct ixgbe_mbx_info *mbx = &hw->mbx;
	s32 retval = mbx->ops.write_posted(hw, msg, size);

	if (retval)
		return retval;

	return mbx->ops.read_posted(hw, retmsg, size);
}

/**
 *  ixgbevf_start_hw_vf - Prepare hardware for Tx/Rx
 *  @hw: pointer to hardware structure
 *
 *  Starts the hardware by filling the bus info structure and media type, clears
 *  all on chip counters, initializes receive address registers, multicast
 *  table, VLAN filter table, calls routine to set up link and flow control
 *  settings, and leaves transmit and receive units disabled and uninitialized
 **/
static s32 ixgbevf_start_hw_vf(struct ixgbe_hw *hw)
{
	/* Clear adapter stopped flag */
	hw->adapter_stopped = false;

	return 0;
}

/**
 *  ixgbevf_init_hw_vf - virtual function hardware initialization
 *  @hw: pointer to hardware structure
 *
 *  Initialize the hardware by resetting the hardware and then starting
 *  the hardware
 **/
static s32 ixgbevf_init_hw_vf(struct ixgbe_hw *hw)
{
	s32 status = hw->mac.ops.start_hw(hw);

	hw->mac.ops.get_mac_addr(hw, hw->mac.addr);

	return status;
}

/**
 *  ixgbevf_reset_hw_vf - Performs hardware reset
 *  @hw: pointer to hardware structure
 *
 *  Resets the hardware by resetting the transmit and receive units, masks and
 *  clears all interrupts.
 **/
static s32 ixgbevf_reset_hw_vf(struct ixgbe_hw *hw)
{
	struct ixgbe_mbx_info *mbx = &hw->mbx;
	u32 timeout = IXGBE_VF_INIT_TIMEOUT;
	s32 ret_val = IXGBE_ERR_INVALID_MAC_ADDR;
	u32 msgbuf[IXGBE_VF_PERMADDR_MSG_LEN];
	u8 *addr = (u8 *)(&msgbuf[1]);

	/* Call adapter stop to disable tx/rx and clear interrupts */
	hw->mac.ops.stop_adapter(hw);

	/* reset the api version */
	hw->api_version = ixgbe_mbox_api_10;

	IXGBE_WRITE_REG(hw, IXGBE_VFCTRL, IXGBE_CTRL_RST);
	IXGBE_WRITE_FLUSH(hw);

	/* we cannot reset while the RSTI / RSTD bits are asserted */
	while (!mbx->ops.check_for_rst(hw) && timeout) {
		timeout--;
		udelay(5);
	}

	if (!timeout)
		return IXGBE_ERR_RESET_FAILED;

	/* mailbox timeout can now become active */
	mbx->timeout = IXGBE_VF_MBX_INIT_TIMEOUT;

	msgbuf[0] = IXGBE_VF_RESET;
	mbx->ops.write_posted(hw, msgbuf, 1);

	mdelay(10);

	/* set our "perm_addr" based on info provided by PF
	 * also set up the mc_filter_type which is piggy backed
	 * on the mac address in word 3
	 */
	ret_val = mbx->ops.read_posted(hw, msgbuf, IXGBE_VF_PERMADDR_MSG_LEN);
	if (ret_val)
		return ret_val;

	/* New versions of the PF may NACK the reset return message
	 * to indicate that no MAC address has yet been assigned for
	 * the VF.
	 */
	if (msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK) &&
	    msgbuf[0] != (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_NACK))
		return IXGBE_ERR_INVALID_MAC_ADDR;

	if (msgbuf[0] == (IXGBE_VF_RESET | IXGBE_VT_MSGTYPE_ACK))
		ether_addr_copy(hw->mac.perm_addr, addr);

	hw->mac.mc_filter_type = msgbuf[IXGBE_VF_MC_TYPE_WORD];

	return 0;
}

/**
 * Hyper-V variant; the VF/PF communication is through the PCI
 * config space.
 * @hw: pointer to private hardware struct
 */
static s32 ixgbevf_hv_reset_hw_vf(struct ixgbe_hw *hw)
{
#if IS_ENABLED(CONFIG_PCI_MMCONFIG)
	struct ixgbevf_adapter *adapter = hw->back;
	int i;

	for (i = 0; i < 6; i++)
		pci_read_config_byte(adapter->pdev,
				     (i + IXGBE_HV_RESET_OFFSET),
				     &hw->mac.perm_addr[i]);
	return 0;
#else
	pr_err("PCI_MMCONFIG needs to be enabled for Hyper-V\n");
	return -EOPNOTSUPP;
#endif
}

/**
 *  ixgbevf_stop_hw_vf - Generic stop Tx/Rx units
 *  @hw: pointer to hardware structure
 *
 *  Sets the adapter_stopped flag within ixgbe_hw struct. Clears interrupts,
 *  disables transmit and receive units. The adapter_stopped flag is used by
 *  the shared code and drivers to determine if the adapter is in a stopped
 *  state and should not touch the hardware.
 **/
static s32 ixgbevf_stop_hw_vf(struct ixgbe_hw *hw)
{
	u32 number_of_queues;
	u32 reg_val;
	u16 i;

	/* Set the adapter_stopped flag so other driver functions stop touching
	 * the hardware
	 */
	hw->adapter_stopped = true;

	/* Disable the receive unit by stopped each queue */
	number_of_queues = hw->mac.max_rx_queues;
	for (i = 0; i < number_of_queues; i++) {
		reg_val = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(i));
		if (reg_val & IXGBE_RXDCTL_ENABLE) {
			reg_val &= ~IXGBE_RXDCTL_ENABLE;
			IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(i), reg_val);
		}
	}

	IXGBE_WRITE_FLUSH(hw);

	/* Clear interrupt mask to stop from interrupts being generated */
	IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, IXGBE_VF_IRQ_CLEAR_MASK);

	/* Clear any pending interrupts */
	IXGBE_READ_REG(hw, IXGBE_VTEICR);

	/* Disable the transmit unit.  Each queue must be disabled. */
	number_of_queues = hw->mac.max_tx_queues;
	for (i = 0; i < number_of_queues; i++) {
		reg_val = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(i));
		if (reg_val & IXGBE_TXDCTL_ENABLE) {
			reg_val &= ~IXGBE_TXDCTL_ENABLE;
			IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(i), reg_val);
		}
	}

	return 0;
}

/**
 *  ixgbevf_mta_vector - Determines bit-vector in multicast table to set
 *  @hw: pointer to hardware structure
 *  @mc_addr: the multicast address
 *
 *  Extracts the 12 bits, from a multicast address, to determine which
 *  bit-vector to set in the multicast table. The hardware uses 12 bits, from
 *  incoming Rx multicast addresses, to determine the bit-vector to check in
 *  the MTA. Which of the 4 combination, of 12-bits, the hardware uses is set
 *  by the MO field of the MCSTCTRL. The MO field is set during initialization
 *  to mc_filter_type.
 **/
static s32 ixgbevf_mta_vector(struct ixgbe_hw *hw, u8 *mc_addr)
{
	u32 vector = 0;

	switch (hw->mac.mc_filter_type) {
	case 0:   /* use bits [47:36] of the address */
		vector = ((mc_addr[4] >> 4) | (((u16)mc_addr[5]) << 4));
		break;
	case 1:   /* use bits [46:35] of the address */
		vector = ((mc_addr[4] >> 3) | (((u16)mc_addr[5]) << 5));
		break;
	case 2:   /* use bits [45:34] of the address */
		vector = ((mc_addr[4] >> 2) | (((u16)mc_addr[5]) << 6));
		break;
	case 3:   /* use bits [43:32] of the address */
		vector = ((mc_addr[4]) | (((u16)mc_addr[5]) << 8));
		break;
	default:  /* Invalid mc_filter_type */
		break;
	}

	/* vector can only be 12-bits or boundary will be exceeded */
	vector &= 0xFFF;
	return vector;
}

/**
 *  ixgbevf_get_mac_addr_vf - Read device MAC address
 *  @hw: pointer to the HW structure
 *  @mac_addr: pointer to storage for retrieved MAC address
 **/
static s32 ixgbevf_get_mac_addr_vf(struct ixgbe_hw *hw, u8 *mac_addr)
{
	ether_addr_copy(mac_addr, hw->mac.perm_addr);

	return 0;
}

static s32 ixgbevf_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr)
{
	u32 msgbuf[3], msgbuf_chk;
	u8 *msg_addr = (u8 *)(&msgbuf[1]);
	s32 ret_val;

	memset(msgbuf, 0, sizeof(msgbuf));
	/* If index is one then this is the start of a new list and needs
	 * indication to the PF so it can do it's own list management.
	 * If it is zero then that tells the PF to just clear all of
	 * this VF's macvlans and there is no new list.
	 */
	msgbuf[0] |= index << IXGBE_VT_MSGINFO_SHIFT;
	msgbuf[0] |= IXGBE_VF_SET_MACVLAN;
	msgbuf_chk = msgbuf[0];

	if (addr)
		ether_addr_copy(msg_addr, addr);

	ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
					     ARRAY_SIZE(msgbuf));
	if (!ret_val) {
		msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;

		if (msgbuf[0] == (msgbuf_chk | IXGBE_VT_MSGTYPE_NACK))
			return -ENOMEM;
	}

	return ret_val;
}

static s32 ixgbevf_hv_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr)
{
	return -EOPNOTSUPP;
}

/**
 * ixgbevf_get_reta_locked - get the RSS redirection table (RETA) contents.
 * @hw: pointer to hardware structure
 * @reta: buffer to fill with RETA contents.
 * @num_rx_queues: Number of Rx queues configured for this port
 *
 * The "reta" buffer should be big enough to contain 32 registers.
 *
 * Returns: 0 on success.
 *          if API doesn't support this operation - (-EOPNOTSUPP).
 */
int ixgbevf_get_reta_locked(struct ixgbe_hw *hw, u32 *reta, int num_rx_queues)
{
	int err, i, j;
	u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
	u32 *hw_reta = &msgbuf[1];
	u32 mask = 0;

	/* We have to use a mailbox for 82599 and x540 devices only.
	 * For these devices RETA has 128 entries.
	 * Also these VFs support up to 4 RSS queues. Therefore PF will compress
	 * 16 RETA entries in each DWORD giving 2 bits to each entry.
	 */
	int dwords = IXGBEVF_82599_RETA_SIZE / 16;

	/* We support the RSS querying for 82599 and x540 devices only.
	 * Thus return an error if API doesn't support RETA querying or querying
	 * is not supported for this device type.
	 */
	switch (hw->api_version) {
	case ixgbe_mbox_api_13:
	case ixgbe_mbox_api_12:
		if (hw->mac.type < ixgbe_mac_X550_vf)
			break;
		/* fall through */
	default:
		return -EOPNOTSUPP;
	}

	msgbuf[0] = IXGBE_VF_GET_RETA;

	err = hw->mbx.ops.write_posted(hw, msgbuf, 1);

	if (err)
		return err;

	err = hw->mbx.ops.read_posted(hw, msgbuf, dwords + 1);

	if (err)
		return err;

	msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;

	/* If the operation has been refused by a PF return -EPERM */
	if (msgbuf[0] == (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_NACK))
		return -EPERM;

	/* If we didn't get an ACK there must have been
	 * some sort of mailbox error so we should treat it
	 * as such.
	 */
	if (msgbuf[0] != (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_ACK))
		return IXGBE_ERR_MBX;

	/* ixgbevf doesn't support more than 2 queues at the moment */
	if (num_rx_queues > 1)
		mask = 0x1;

	for (i = 0; i < dwords; i++)
		for (j = 0; j < 16; j++)
			reta[i * 16 + j] = (hw_reta[i] >> (2 * j)) & mask;

	return 0;
}

/**
 * ixgbevf_get_rss_key_locked - get the RSS Random Key
 * @hw: pointer to the HW structure
 * @rss_key: buffer to fill with RSS Hash Key contents.
 *
 * The "rss_key" buffer should be big enough to contain 10 registers.
 *
 * Returns: 0 on success.
 *          if API doesn't support this operation - (-EOPNOTSUPP).
 */
int ixgbevf_get_rss_key_locked(struct ixgbe_hw *hw, u8 *rss_key)
{
	int err;
	u32 msgbuf[IXGBE_VFMAILBOX_SIZE];

	/* We currently support the RSS Random Key retrieval for 82599 and x540
	 * devices only.
	 *
	 * Thus return an error if API doesn't support RSS Random Key retrieval
	 * or if the operation is not supported for this device type.
	 */
	switch (hw->api_version) {
	case ixgbe_mbox_api_13:
	case ixgbe_mbox_api_12:
		if (hw->mac.type < ixgbe_mac_X550_vf)
			break;
		/* fall through */
	default:
		return -EOPNOTSUPP;
	}

	msgbuf[0] = IXGBE_VF_GET_RSS_KEY;
	err = hw->mbx.ops.write_posted(hw, msgbuf, 1);

	if (err)
		return err;

	err = hw->mbx.ops.read_posted(hw, msgbuf, 11);

	if (err)
		return err;

	msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;

	/* If the operation has been refused by a PF return -EPERM */
	if (msgbuf[0] == (IXGBE_VF_GET_RSS_KEY | IXGBE_VT_MSGTYPE_NACK))
		return -EPERM;

	/* If we didn't get an ACK there must have been
	 * some sort of mailbox error so we should treat it
	 * as such.
	 */
	if (msgbuf[0] != (IXGBE_VF_GET_RSS_KEY | IXGBE_VT_MSGTYPE_ACK))
		return IXGBE_ERR_MBX;

	memcpy(rss_key, msgbuf + 1, IXGBEVF_RSS_HASH_KEY_SIZE);

	return 0;
}

/**
 *  ixgbevf_set_rar_vf - set device MAC address
 *  @hw: pointer to hardware structure
 *  @index: Receive address register to write
 *  @addr: Address to put into receive address register
 *  @vmdq: Unused in this implementation
 **/
static s32 ixgbevf_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr,
			      u32 vmdq)
{
	u32 msgbuf[3];
	u8 *msg_addr = (u8 *)(&msgbuf[1]);
	s32 ret_val;

	memset(msgbuf, 0, sizeof(msgbuf));
	msgbuf[0] = IXGBE_VF_SET_MAC_ADDR;
	ether_addr_copy(msg_addr, addr);

	ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
					     ARRAY_SIZE(msgbuf));
	msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;

	/* if nacked the address was rejected, use "perm_addr" */
	if (!ret_val &&
	    (msgbuf[0] == (IXGBE_VF_SET_MAC_ADDR | IXGBE_VT_MSGTYPE_NACK))) {
		ixgbevf_get_mac_addr_vf(hw, hw->mac.addr);
		return IXGBE_ERR_MBX;
	}

	return ret_val;
}

/**
 *  ixgbevf_hv_set_rar_vf - set device MAC address Hyper-V variant
 *  @hw: pointer to hardware structure
 *  @index: Receive address register to write
 *  @addr: Address to put into receive address register
 *  @vmdq: Unused in this implementation
 *
 * We don't really allow setting the device MAC address. However,
 * if the address being set is the permanent MAC address we will
 * permit that.
 **/
static s32 ixgbevf_hv_set_rar_vf(struct ixgbe_hw *hw, u32 index, u8 *addr,
				 u32 vmdq)
{
	if (ether_addr_equal(addr, hw->mac.perm_addr))
		return 0;

	return -EOPNOTSUPP;
}

/**
 *  ixgbevf_update_mc_addr_list_vf - Update Multicast addresses
 *  @hw: pointer to the HW structure
 *  @netdev: pointer to net device structure
 *
 *  Updates the Multicast Table Array.
 **/
static s32 ixgbevf_update_mc_addr_list_vf(struct ixgbe_hw *hw,
					  struct net_device *netdev)
{
	struct netdev_hw_addr *ha;
	u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
	u16 *vector_list = (u16 *)&msgbuf[1];
	u32 cnt, i;

	/* Each entry in the list uses 1 16 bit word.  We have 30
	 * 16 bit words available in our HW msg buffer (minus 1 for the
	 * msg type).  That's 30 hash values if we pack 'em right.  If
	 * there are more than 30 MC addresses to add then punt the
	 * extras for now and then add code to handle more than 30 later.
	 * It would be unusual for a server to request that many multi-cast
	 * addresses except for in large enterprise network environments.
	 */

	cnt = netdev_mc_count(netdev);
	if (cnt > 30)
		cnt = 30;
	msgbuf[0] = IXGBE_VF_SET_MULTICAST;
	msgbuf[0] |= cnt << IXGBE_VT_MSGINFO_SHIFT;

	i = 0;
	netdev_for_each_mc_addr(ha, netdev) {
		if (i == cnt)
			break;
		if (is_link_local_ether_addr(ha->addr))
			continue;

		vector_list[i++] = ixgbevf_mta_vector(hw, ha->addr);
	}

	ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf, IXGBE_VFMAILBOX_SIZE);

	return 0;
}

/**
 * Hyper-V variant - just a stub.
 * @hw: unused
 * @netdev: unused
 */
static s32 ixgbevf_hv_update_mc_addr_list_vf(struct ixgbe_hw *hw,
					     struct net_device *netdev)
{
	return -EOPNOTSUPP;
}

/**
 *  ixgbevf_update_xcast_mode - Update Multicast mode
 *  @hw: pointer to the HW structure
 *  @xcast_mode: new multicast mode
 *
 *  Updates the Multicast Mode of VF.
 **/
static s32 ixgbevf_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode)
{
	u32 msgbuf[2];
	s32 err;

	switch (hw->api_version) {
	case ixgbe_mbox_api_12:
		/* promisc introduced in 1.3 version */
		if (xcast_mode == IXGBEVF_XCAST_MODE_PROMISC)
			return -EOPNOTSUPP;
		/* Fall threw */
	case ixgbe_mbox_api_13:
		break;
	default:
		return -EOPNOTSUPP;
	}

	msgbuf[0] = IXGBE_VF_UPDATE_XCAST_MODE;
	msgbuf[1] = xcast_mode;

	err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
					 ARRAY_SIZE(msgbuf));
	if (err)
		return err;

	msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
	if (msgbuf[0] == (IXGBE_VF_UPDATE_XCAST_MODE | IXGBE_VT_MSGTYPE_NACK))
		return -EPERM;

	return 0;
}

/**
 * Hyper-V variant - just a stub.
 * @hw: unused
 * @xcast_mode: unused
 */
static s32 ixgbevf_hv_update_xcast_mode(struct ixgbe_hw *hw, int xcast_mode)
{
	return -EOPNOTSUPP;
}

/**
 *  ixgbevf_set_vfta_vf - Set/Unset VLAN filter table address
 *  @hw: pointer to the HW structure
 *  @vlan: 12 bit VLAN ID
 *  @vind: unused by VF drivers
 *  @vlan_on: if true then set bit, else clear bit
 **/
static s32 ixgbevf_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind,
			       bool vlan_on)
{
	u32 msgbuf[2];
	s32 err;

	msgbuf[0] = IXGBE_VF_SET_VLAN;
	msgbuf[1] = vlan;
	/* Setting the 8 bit field MSG INFO to TRUE indicates "add" */
	msgbuf[0] |= vlan_on << IXGBE_VT_MSGINFO_SHIFT;

	err = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
					 ARRAY_SIZE(msgbuf));
	if (err)
		goto mbx_err;

	/* remove extra bits from the message */
	msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
	msgbuf[0] &= ~(0xFF << IXGBE_VT_MSGINFO_SHIFT);

	if (msgbuf[0] != (IXGBE_VF_SET_VLAN | IXGBE_VT_MSGTYPE_ACK))
		err = IXGBE_ERR_INVALID_ARGUMENT;

mbx_err:
	return err;
}

/**
 * Hyper-V variant - just a stub.
 * @hw: unused
 * @vlan: unused
 * @vind: unused
 * @vlan_on: unused
 */
static s32 ixgbevf_hv_set_vfta_vf(struct ixgbe_hw *hw, u32 vlan, u32 vind,
				  bool vlan_on)
{
	return -EOPNOTSUPP;
}

/**
 *  ixgbevf_setup_mac_link_vf - Setup MAC link settings
 *  @hw: pointer to hardware structure
 *  @speed: Unused in this implementation
 *  @autoneg: Unused in this implementation
 *  @autoneg_wait_to_complete: Unused in this implementation
 *
 *  Do nothing and return success.  VF drivers are not allowed to change
 *  global settings.  Maintained for driver compatibility.
 **/
static s32 ixgbevf_setup_mac_link_vf(struct ixgbe_hw *hw,
				     ixgbe_link_speed speed, bool autoneg,
				     bool autoneg_wait_to_complete)
{
	return 0;
}

/**
 *  ixgbevf_check_mac_link_vf - Get link/speed status
 *  @hw: pointer to hardware structure
 *  @speed: pointer to link speed
 *  @link_up: true is link is up, false otherwise
 *  @autoneg_wait_to_complete: unused
 *
 *  Reads the links register to determine if link is up and the current speed
 **/
static s32 ixgbevf_check_mac_link_vf(struct ixgbe_hw *hw,
				     ixgbe_link_speed *speed,
				     bool *link_up,
				     bool autoneg_wait_to_complete)
{
	struct ixgbe_mbx_info *mbx = &hw->mbx;
	struct ixgbe_mac_info *mac = &hw->mac;
	s32 ret_val = 0;
	u32 links_reg;
	u32 in_msg = 0;

	/* If we were hit with a reset drop the link */
	if (!mbx->ops.check_for_rst(hw) || !mbx->timeout)
		mac->get_link_status = true;

	if (!mac->get_link_status)
		goto out;

	/* if link status is down no point in checking to see if pf is up */
	links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
	if (!(links_reg & IXGBE_LINKS_UP))
		goto out;

	/* for SFP+ modules and DA cables on 82599 it can take up to 500usecs
	 * before the link status is correct
	 */
	if (mac->type == ixgbe_mac_82599_vf) {
		int i;

		for (i = 0; i < 5; i++) {
			udelay(100);
			links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);

			if (!(links_reg & IXGBE_LINKS_UP))
				goto out;
		}
	}

	switch (links_reg & IXGBE_LINKS_SPEED_82599) {
	case IXGBE_LINKS_SPEED_10G_82599:
		*speed = IXGBE_LINK_SPEED_10GB_FULL;
		break;
	case IXGBE_LINKS_SPEED_1G_82599:
		*speed = IXGBE_LINK_SPEED_1GB_FULL;
		break;
	case IXGBE_LINKS_SPEED_100_82599:
		*speed = IXGBE_LINK_SPEED_100_FULL;
		break;
	}

	/* if the read failed it could just be a mailbox collision, best wait
	 * until we are called again and don't report an error
	 */
	if (mbx->ops.read(hw, &in_msg, 1))
		goto out;

	if (!(in_msg & IXGBE_VT_MSGTYPE_CTS)) {
		/* msg is not CTS and is NACK we must have lost CTS status */
		if (in_msg & IXGBE_VT_MSGTYPE_NACK)
			ret_val = -1;
		goto out;
	}

	/* the pf is talking, if we timed out in the past we reinit */
	if (!mbx->timeout) {
		ret_val = -1;
		goto out;
	}

	/* if we passed all the tests above then the link is up and we no
	 * longer need to check for link
	 */
	mac->get_link_status = false;

out:
	*link_up = !mac->get_link_status;
	return ret_val;
}

/**
 * Hyper-V variant; there is no mailbox communication.
 * @hw: pointer to private hardware struct
 * @speed: pointer to link speed
 * @link_up: true is link is up, false otherwise
 * @autoneg_wait_to_complete: unused
 */
static s32 ixgbevf_hv_check_mac_link_vf(struct ixgbe_hw *hw,
					ixgbe_link_speed *speed,
					bool *link_up,
					bool autoneg_wait_to_complete)
{
	struct ixgbe_mbx_info *mbx = &hw->mbx;
	struct ixgbe_mac_info *mac = &hw->mac;
	u32 links_reg;

	/* If we were hit with a reset drop the link */
	if (!mbx->ops.check_for_rst(hw) || !mbx->timeout)
		mac->get_link_status = true;

	if (!mac->get_link_status)
		goto out;

	/* if link status is down no point in checking to see if pf is up */
	links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);
	if (!(links_reg & IXGBE_LINKS_UP))
		goto out;

	/* for SFP+ modules and DA cables on 82599 it can take up to 500usecs
	 * before the link status is correct
	 */
	if (mac->type == ixgbe_mac_82599_vf) {
		int i;

		for (i = 0; i < 5; i++) {
			udelay(100);
			links_reg = IXGBE_READ_REG(hw, IXGBE_VFLINKS);

			if (!(links_reg & IXGBE_LINKS_UP))
				goto out;
		}
	}

	switch (links_reg & IXGBE_LINKS_SPEED_82599) {
	case IXGBE_LINKS_SPEED_10G_82599:
		*speed = IXGBE_LINK_SPEED_10GB_FULL;
		break;
	case IXGBE_LINKS_SPEED_1G_82599:
		*speed = IXGBE_LINK_SPEED_1GB_FULL;
		break;
	case IXGBE_LINKS_SPEED_100_82599:
		*speed = IXGBE_LINK_SPEED_100_FULL;
		break;
	}

	/* if we passed all the tests above then the link is up and we no
	 * longer need to check for link
	 */
	mac->get_link_status = false;

out:
	*link_up = !mac->get_link_status;
	return 0;
}

/**
 *  ixgbevf_set_rlpml_vf - Set the maximum receive packet length
 *  @hw: pointer to the HW structure
 *  @max_size: value to assign to max frame size
 **/
static s32 ixgbevf_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size)
{
	u32 msgbuf[2];
	s32 ret_val;

	msgbuf[0] = IXGBE_VF_SET_LPE;
	msgbuf[1] = max_size;

	ret_val = ixgbevf_write_msg_read_ack(hw, msgbuf, msgbuf,
					     ARRAY_SIZE(msgbuf));
	if (ret_val)
		return ret_val;
	if ((msgbuf[0] & IXGBE_VF_SET_LPE) &&
	    (msgbuf[0] & IXGBE_VT_MSGTYPE_NACK))
		return IXGBE_ERR_MBX;

	return 0;
}

/**
 * ixgbevf_hv_set_rlpml_vf - Set the maximum receive packet length
 * @hw: pointer to the HW structure
 * @max_size: value to assign to max frame size
 * Hyper-V variant.
 **/
static s32 ixgbevf_hv_set_rlpml_vf(struct ixgbe_hw *hw, u16 max_size)
{
	u32 reg;

	/* If we are on Hyper-V, we implement this functionality
	 * differently.
	 */
	reg =  IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(0));
	/* CRC == 4 */
	reg |= ((max_size + 4) | IXGBE_RXDCTL_RLPML_EN);
	IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(0), reg);

	return 0;
}

/**
 *  ixgbevf_negotiate_api_version_vf - Negotiate supported API version
 *  @hw: pointer to the HW structure
 *  @api: integer containing requested API version
 **/
static int ixgbevf_negotiate_api_version_vf(struct ixgbe_hw *hw, int api)
{
	int err;
	u32 msg[3];

	/* Negotiate the mailbox API version */
	msg[0] = IXGBE_VF_API_NEGOTIATE;
	msg[1] = api;
	msg[2] = 0;

	err = ixgbevf_write_msg_read_ack(hw, msg, msg, ARRAY_SIZE(msg));
	if (!err) {
		msg[0] &= ~IXGBE_VT_MSGTYPE_CTS;

		/* Store value and return 0 on success */
		if (msg[0] == (IXGBE_VF_API_NEGOTIATE | IXGBE_VT_MSGTYPE_ACK)) {
			hw->api_version = api;
			return 0;
		}

		err = IXGBE_ERR_INVALID_ARGUMENT;
	}

	return err;
}

/**
 *  ixgbevf_hv_negotiate_api_version_vf - Negotiate supported API version
 *  @hw: pointer to the HW structure
 *  @api: integer containing requested API version
 *  Hyper-V version - only ixgbe_mbox_api_10 supported.
 **/
static int ixgbevf_hv_negotiate_api_version_vf(struct ixgbe_hw *hw, int api)
{
	/* Hyper-V only supports api version ixgbe_mbox_api_10 */
	if (api != ixgbe_mbox_api_10)
		return IXGBE_ERR_INVALID_ARGUMENT;

	return 0;
}

int ixgbevf_get_queues(struct ixgbe_hw *hw, unsigned int *num_tcs,
		       unsigned int *default_tc)
{
	int err;
	u32 msg[5];

	/* do nothing if API doesn't support ixgbevf_get_queues */
	switch (hw->api_version) {
	case ixgbe_mbox_api_11:
	case ixgbe_mbox_api_12:
	case ixgbe_mbox_api_13:
		break;
	default:
		return 0;
	}

	/* Fetch queue configuration from the PF */
	msg[0] = IXGBE_VF_GET_QUEUE;
	msg[1] = msg[2] = msg[3] = msg[4] = 0;

	err = ixgbevf_write_msg_read_ack(hw, msg, msg, ARRAY_SIZE(msg));
	if (!err) {
		msg[0] &= ~IXGBE_VT_MSGTYPE_CTS;

		/* if we we didn't get an ACK there must have been
		 * some sort of mailbox error so we should treat it
		 * as such
		 */
		if (msg[0] != (IXGBE_VF_GET_QUEUE | IXGBE_VT_MSGTYPE_ACK))
			return IXGBE_ERR_MBX;

		/* record and validate values from message */
		hw->mac.max_tx_queues = msg[IXGBE_VF_TX_QUEUES];
		if (hw->mac.max_tx_queues == 0 ||
		    hw->mac.max_tx_queues > IXGBE_VF_MAX_TX_QUEUES)
			hw->mac.max_tx_queues = IXGBE_VF_MAX_TX_QUEUES;

		hw->mac.max_rx_queues = msg[IXGBE_VF_RX_QUEUES];
		if (hw->mac.max_rx_queues == 0 ||
		    hw->mac.max_rx_queues > IXGBE_VF_MAX_RX_QUEUES)
			hw->mac.max_rx_queues = IXGBE_VF_MAX_RX_QUEUES;

		*num_tcs = msg[IXGBE_VF_TRANS_VLAN];
		/* in case of unknown state assume we cannot tag frames */
		if (*num_tcs > hw->mac.max_rx_queues)
			*num_tcs = 1;

		*default_tc = msg[IXGBE_VF_DEF_QUEUE];
		/* default to queue 0 on out-of-bounds queue number */
		if (*default_tc >= hw->mac.max_tx_queues)
			*default_tc = 0;
	}

	return err;
}

static const struct ixgbe_mac_operations ixgbevf_mac_ops = {
	.init_hw		= ixgbevf_init_hw_vf,
	.reset_hw		= ixgbevf_reset_hw_vf,
	.start_hw		= ixgbevf_start_hw_vf,
	.get_mac_addr		= ixgbevf_get_mac_addr_vf,
	.stop_adapter		= ixgbevf_stop_hw_vf,
	.setup_link		= ixgbevf_setup_mac_link_vf,
	.check_link		= ixgbevf_check_mac_link_vf,
	.negotiate_api_version	= ixgbevf_negotiate_api_version_vf,
	.set_rar		= ixgbevf_set_rar_vf,
	.update_mc_addr_list	= ixgbevf_update_mc_addr_list_vf,
	.update_xcast_mode	= ixgbevf_update_xcast_mode,
	.set_uc_addr		= ixgbevf_set_uc_addr_vf,
	.set_vfta		= ixgbevf_set_vfta_vf,
	.set_rlpml		= ixgbevf_set_rlpml_vf,
};

static const struct ixgbe_mac_operations ixgbevf_hv_mac_ops = {
	.init_hw		= ixgbevf_init_hw_vf,
	.reset_hw		= ixgbevf_hv_reset_hw_vf,
	.start_hw		= ixgbevf_start_hw_vf,
	.get_mac_addr		= ixgbevf_get_mac_addr_vf,
	.stop_adapter		= ixgbevf_stop_hw_vf,
	.setup_link		= ixgbevf_setup_mac_link_vf,
	.check_link		= ixgbevf_hv_check_mac_link_vf,
	.negotiate_api_version	= ixgbevf_hv_negotiate_api_version_vf,
	.set_rar		= ixgbevf_hv_set_rar_vf,
	.update_mc_addr_list	= ixgbevf_hv_update_mc_addr_list_vf,
	.update_xcast_mode	= ixgbevf_hv_update_xcast_mode,
	.set_uc_addr		= ixgbevf_hv_set_uc_addr_vf,
	.set_vfta		= ixgbevf_hv_set_vfta_vf,
	.set_rlpml		= ixgbevf_hv_set_rlpml_vf,
};

const struct ixgbevf_info ixgbevf_82599_vf_info = {
	.mac = ixgbe_mac_82599_vf,
	.mac_ops = &ixgbevf_mac_ops,
};

const struct ixgbevf_info ixgbevf_82599_vf_hv_info = {
	.mac = ixgbe_mac_82599_vf,
	.mac_ops = &ixgbevf_hv_mac_ops,
};

const struct ixgbevf_info ixgbevf_X540_vf_info = {
	.mac = ixgbe_mac_X540_vf,
	.mac_ops = &ixgbevf_mac_ops,
};

const struct ixgbevf_info ixgbevf_X540_vf_hv_info = {
	.mac = ixgbe_mac_X540_vf,
	.mac_ops = &ixgbevf_hv_mac_ops,
};

const struct ixgbevf_info ixgbevf_X550_vf_info = {
	.mac = ixgbe_mac_X550_vf,
	.mac_ops = &ixgbevf_mac_ops,
};

const struct ixgbevf_info ixgbevf_X550_vf_hv_info = {
	.mac = ixgbe_mac_X550_vf,
	.mac_ops = &ixgbevf_hv_mac_ops,
};

const struct ixgbevf_info ixgbevf_X550EM_x_vf_info = {
	.mac = ixgbe_mac_X550EM_x_vf,
	.mac_ops = &ixgbevf_mac_ops,
};

const struct ixgbevf_info ixgbevf_X550EM_x_vf_hv_info = {
	.mac = ixgbe_mac_X550EM_x_vf,
	.mac_ops = &ixgbevf_hv_mac_ops,
};

const struct ixgbevf_info ixgbevf_x550em_a_vf_info = {
	.mac = ixgbe_mac_x550em_a_vf,
	.mac_ops = &ixgbevf_mac_ops,
};