summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/brcm80211/brcmfmac/dhd_common.c
blob: 4187435220f34fbbb5b33fb9d266ffaff121c713 (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
/*
 * Copyright (c) 2010 Broadcom Corporation
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/sched.h>
#include <linux/netdevice.h>
#include <asm/unaligned.h>
#include <defs.h>
#include <brcmu_wifi.h>
#include <brcmu_utils.h>
#include "dhd.h"
#include "dhd_bus.h"
#include "dhd_proto.h"
#include "dhd_dbg.h"

#define BRCM_OUI			"\x00\x10\x18"
#define DOT11_OUI_LEN			3
#define BCMILCP_BCM_SUBTYPE_EVENT	1
#define PKTFILTER_BUF_SIZE		2048
#define BRCMF_ARPOL_MODE		0xb	/* agent|snoop|peer_autoreply */

#define MSGTRACE_VERSION	1

#define BRCMF_PKT_FILTER_FIXED_LEN	offsetof(struct brcmf_pkt_filter_le, u)
#define BRCMF_PKT_FILTER_PATTERN_FIXED_LEN	\
	offsetof(struct brcmf_pkt_filter_pattern_le, mask_and_pattern)

#ifdef DEBUG
static const char brcmf_version[] =
	"Dongle Host Driver, version " BRCMF_VERSION_STR "\nCompiled on "
	__DATE__ " at " __TIME__;
#else
static const char brcmf_version[] =
	"Dongle Host Driver, version " BRCMF_VERSION_STR;
#endif

/* Message trace header */
struct msgtrace_hdr {
	u8 version;
	u8 spare;
	__be16 len;		/* Len of the trace */
	__be32 seqnum;		/* Sequence number of message. Useful
				 * if the messsage has been lost
				 * because of DMA error or a bus reset
				 * (ex: SDIO Func2)
				 */
	__be32 discarded_bytes;	/* Number of discarded bytes because of
				 trace overflow  */
	__be32 discarded_printf;	/* Number of discarded printf
				 because of trace overflow */
} __packed;


uint
brcmf_c_mkiovar(char *name, char *data, uint datalen, char *buf, uint buflen)
{
	uint len;

	len = strlen(name) + 1;

	if ((len + datalen) > buflen)
		return 0;

	strncpy(buf, name, buflen);

	/* append data onto the end of the name string */
	memcpy(&buf[len], data, datalen);
	len += datalen;

	return len;
}

bool brcmf_c_prec_enq(struct device *dev, struct pktq *q,
		      struct sk_buff *pkt, int prec)
{
	struct sk_buff *p;
	int eprec = -1;		/* precedence to evict from */
	bool discard_oldest;
	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
	struct brcmf_pub *drvr = bus_if->drvr;

	/* Fast case, precedence queue is not full and we are also not
	 * exceeding total queue length
	 */
	if (!pktq_pfull(q, prec) && !pktq_full(q)) {
		brcmu_pktq_penq(q, prec, pkt);
		return true;
	}

	/* Determine precedence from which to evict packet, if any */
	if (pktq_pfull(q, prec))
		eprec = prec;
	else if (pktq_full(q)) {
		p = brcmu_pktq_peek_tail(q, &eprec);
		if (eprec > prec)
			return false;
	}

	/* Evict if needed */
	if (eprec >= 0) {
		/* Detect queueing to unconfigured precedence */
		discard_oldest = ac_bitmap_tst(drvr->wme_dp, eprec);
		if (eprec == prec && !discard_oldest)
			return false;	/* refuse newer (incoming) packet */
		/* Evict packet according to discard policy */
		p = discard_oldest ? brcmu_pktq_pdeq(q, eprec) :
			brcmu_pktq_pdeq_tail(q, eprec);
		if (p == NULL)
			brcmf_dbg(ERROR, "brcmu_pktq_penq() failed, oldest %d\n",
				  discard_oldest);

		brcmu_pkt_buf_free_skb(p);
	}

	/* Enqueue */
	p = brcmu_pktq_penq(q, prec, pkt);
	if (p == NULL)
		brcmf_dbg(ERROR, "brcmu_pktq_penq() failed\n");

	return p != NULL;
}

#ifdef DEBUG
static void
brcmf_c_show_host_event(struct brcmf_event_msg *event, void *event_data)
{
	uint i, status, reason;
	bool group = false, flush_txq = false, link = false;
	char *auth_str, *event_name;
	unsigned char *buf;
	char err_msg[256], eabuf[ETHER_ADDR_STR_LEN];
	static struct {
		uint event;
		char *event_name;
	} event_names[] = {
		{
		BRCMF_E_SET_SSID, "SET_SSID"}, {
		BRCMF_E_JOIN, "JOIN"}, {
		BRCMF_E_START, "START"}, {
		BRCMF_E_AUTH, "AUTH"}, {
		BRCMF_E_AUTH_IND, "AUTH_IND"}, {
		BRCMF_E_DEAUTH, "DEAUTH"}, {
		BRCMF_E_DEAUTH_IND, "DEAUTH_IND"}, {
		BRCMF_E_ASSOC, "ASSOC"}, {
		BRCMF_E_ASSOC_IND, "ASSOC_IND"}, {
		BRCMF_E_REASSOC, "REASSOC"}, {
		BRCMF_E_REASSOC_IND, "REASSOC_IND"}, {
		BRCMF_E_DISASSOC, "DISASSOC"}, {
		BRCMF_E_DISASSOC_IND, "DISASSOC_IND"}, {
		BRCMF_E_QUIET_START, "START_QUIET"}, {
		BRCMF_E_QUIET_END, "END_QUIET"}, {
		BRCMF_E_BEACON_RX, "BEACON_RX"}, {
		BRCMF_E_LINK, "LINK"}, {
		BRCMF_E_MIC_ERROR, "MIC_ERROR"}, {
		BRCMF_E_NDIS_LINK, "NDIS_LINK"}, {
		BRCMF_E_ROAM, "ROAM"}, {
		BRCMF_E_TXFAIL, "TXFAIL"}, {
		BRCMF_E_PMKID_CACHE, "PMKID_CACHE"}, {
		BRCMF_E_RETROGRADE_TSF, "RETROGRADE_TSF"}, {
		BRCMF_E_PRUNE, "PRUNE"}, {
		BRCMF_E_AUTOAUTH, "AUTOAUTH"}, {
		BRCMF_E_EAPOL_MSG, "EAPOL_MSG"}, {
		BRCMF_E_SCAN_COMPLETE, "SCAN_COMPLETE"}, {
		BRCMF_E_ADDTS_IND, "ADDTS_IND"}, {
		BRCMF_E_DELTS_IND, "DELTS_IND"}, {
		BRCMF_E_BCNSENT_IND, "BCNSENT_IND"}, {
		BRCMF_E_BCNRX_MSG, "BCNRX_MSG"}, {
		BRCMF_E_BCNLOST_MSG, "BCNLOST_MSG"}, {
		BRCMF_E_ROAM_PREP, "ROAM_PREP"}, {
		BRCMF_E_PFN_NET_FOUND, "PNO_NET_FOUND"}, {
		BRCMF_E_PFN_NET_LOST, "PNO_NET_LOST"}, {
		BRCMF_E_RESET_COMPLETE, "RESET_COMPLETE"}, {
		BRCMF_E_JOIN_START, "JOIN_START"}, {
		BRCMF_E_ROAM_START, "ROAM_START"}, {
		BRCMF_E_ASSOC_START, "ASSOC_START"}, {
		BRCMF_E_IBSS_ASSOC, "IBSS_ASSOC"}, {
		BRCMF_E_RADIO, "RADIO"}, {
		BRCMF_E_PSM_WATCHDOG, "PSM_WATCHDOG"}, {
		BRCMF_E_PROBREQ_MSG, "PROBREQ_MSG"}, {
		BRCMF_E_SCAN_CONFIRM_IND, "SCAN_CONFIRM_IND"}, {
		BRCMF_E_PSK_SUP, "PSK_SUP"}, {
		BRCMF_E_COUNTRY_CODE_CHANGED, "COUNTRY_CODE_CHANGED"}, {
		BRCMF_E_EXCEEDED_MEDIUM_TIME, "EXCEEDED_MEDIUM_TIME"}, {
		BRCMF_E_ICV_ERROR, "ICV_ERROR"}, {
		BRCMF_E_UNICAST_DECODE_ERROR, "UNICAST_DECODE_ERROR"}, {
		BRCMF_E_MULTICAST_DECODE_ERROR, "MULTICAST_DECODE_ERROR"}, {
		BRCMF_E_TRACE, "TRACE"}, {
		BRCMF_E_ACTION_FRAME, "ACTION FRAME"}, {
		BRCMF_E_ACTION_FRAME_COMPLETE, "ACTION FRAME TX COMPLETE"}, {
		BRCMF_E_IF, "IF"}, {
		BRCMF_E_RSSI, "RSSI"}, {
		BRCMF_E_PFN_SCAN_COMPLETE, "SCAN_COMPLETE"}
	};
	uint event_type, flags, auth_type, datalen;
	static u32 seqnum_prev;
	struct msgtrace_hdr hdr;
	u32 nblost;
	char *s, *p;

	event_type = be32_to_cpu(event->event_type);
	flags = be16_to_cpu(event->flags);
	status = be32_to_cpu(event->status);
	reason = be32_to_cpu(event->reason);
	auth_type = be32_to_cpu(event->auth_type);
	datalen = be32_to_cpu(event->datalen);
	/* debug dump of event messages */
	sprintf(eabuf, "%pM", event->addr);

	event_name = "UNKNOWN";
	for (i = 0; i < ARRAY_SIZE(event_names); i++) {
		if (event_names[i].event == event_type)
			event_name = event_names[i].event_name;
	}

	brcmf_dbg(EVENT, "EVENT: %s, event ID = %d\n", event_name, event_type);
	brcmf_dbg(EVENT, "flags 0x%04x, status %d, reason %d, auth_type %d MAC %s\n",
		  flags, status, reason, auth_type, eabuf);

	if (flags & BRCMF_EVENT_MSG_LINK)
		link = true;
	if (flags & BRCMF_EVENT_MSG_GROUP)
		group = true;
	if (flags & BRCMF_EVENT_MSG_FLUSHTXQ)
		flush_txq = true;

	switch (event_type) {
	case BRCMF_E_START:
	case BRCMF_E_DEAUTH:
	case BRCMF_E_DISASSOC:
		brcmf_dbg(EVENT, "MACEVENT: %s, MAC %s\n", event_name, eabuf);
		break;

	case BRCMF_E_ASSOC_IND:
	case BRCMF_E_REASSOC_IND:
		brcmf_dbg(EVENT, "MACEVENT: %s, MAC %s\n", event_name, eabuf);
		break;

	case BRCMF_E_ASSOC:
	case BRCMF_E_REASSOC:
		if (status == BRCMF_E_STATUS_SUCCESS)
			brcmf_dbg(EVENT, "MACEVENT: %s, MAC %s, SUCCESS\n",
				  event_name, eabuf);
		else if (status == BRCMF_E_STATUS_TIMEOUT)
			brcmf_dbg(EVENT, "MACEVENT: %s, MAC %s, TIMEOUT\n",
				  event_name, eabuf);
		else if (status == BRCMF_E_STATUS_FAIL)
			brcmf_dbg(EVENT, "MACEVENT: %s, MAC %s, FAILURE, reason %d\n",
				  event_name, eabuf, (int)reason);
		else
			brcmf_dbg(EVENT, "MACEVENT: %s, MAC %s, unexpected status %d\n",
				  event_name, eabuf, (int)status);
		break;

	case BRCMF_E_DEAUTH_IND:
	case BRCMF_E_DISASSOC_IND:
		brcmf_dbg(EVENT, "MACEVENT: %s, MAC %s, reason %d\n",
			  event_name, eabuf, (int)reason);
		break;

	case BRCMF_E_AUTH:
	case BRCMF_E_AUTH_IND:
		if (auth_type == WLAN_AUTH_OPEN)
			auth_str = "Open System";
		else if (auth_type == WLAN_AUTH_SHARED_KEY)
			auth_str = "Shared Key";
		else {
			sprintf(err_msg, "AUTH unknown: %d", (int)auth_type);
			auth_str = err_msg;
		}
		if (event_type == BRCMF_E_AUTH_IND)
			brcmf_dbg(EVENT, "MACEVENT: %s, MAC %s, %s\n",
				  event_name, eabuf, auth_str);
		else if (status == BRCMF_E_STATUS_SUCCESS)
			brcmf_dbg(EVENT, "MACEVENT: %s, MAC %s, %s, SUCCESS\n",
				  event_name, eabuf, auth_str);
		else if (status == BRCMF_E_STATUS_TIMEOUT)
			brcmf_dbg(EVENT, "MACEVENT: %s, MAC %s, %s, TIMEOUT\n",
				  event_name, eabuf, auth_str);
		else if (status == BRCMF_E_STATUS_FAIL) {
			brcmf_dbg(EVENT, "MACEVENT: %s, MAC %s, %s, FAILURE, reason %d\n",
				  event_name, eabuf, auth_str, (int)reason);
		}

		break;

	case BRCMF_E_JOIN:
	case BRCMF_E_ROAM:
	case BRCMF_E_SET_SSID:
		if (status == BRCMF_E_STATUS_SUCCESS)
			brcmf_dbg(EVENT, "MACEVENT: %s, MAC %s\n",
				  event_name, eabuf);
		else if (status == BRCMF_E_STATUS_FAIL)
			brcmf_dbg(EVENT, "MACEVENT: %s, failed\n", event_name);
		else if (status == BRCMF_E_STATUS_NO_NETWORKS)
			brcmf_dbg(EVENT, "MACEVENT: %s, no networks found\n",
				  event_name);
		else
			brcmf_dbg(EVENT, "MACEVENT: %s, unexpected status %d\n",
				  event_name, (int)status);
		break;

	case BRCMF_E_BEACON_RX:
		if (status == BRCMF_E_STATUS_SUCCESS)
			brcmf_dbg(EVENT, "MACEVENT: %s, SUCCESS\n", event_name);
		else if (status == BRCMF_E_STATUS_FAIL)
			brcmf_dbg(EVENT, "MACEVENT: %s, FAIL\n", event_name);
		else
			brcmf_dbg(EVENT, "MACEVENT: %s, status %d\n",
				  event_name, status);
		break;

	case BRCMF_E_LINK:
		brcmf_dbg(EVENT, "MACEVENT: %s %s\n",
			  event_name, link ? "UP" : "DOWN");
		break;

	case BRCMF_E_MIC_ERROR:
		brcmf_dbg(EVENT, "MACEVENT: %s, MAC %s, Group %d, Flush %d\n",
			  event_name, eabuf, group, flush_txq);
		break;

	case BRCMF_E_ICV_ERROR:
	case BRCMF_E_UNICAST_DECODE_ERROR:
	case BRCMF_E_MULTICAST_DECODE_ERROR:
		brcmf_dbg(EVENT, "MACEVENT: %s, MAC %s\n", event_name, eabuf);
		break;

	case BRCMF_E_TXFAIL:
		brcmf_dbg(EVENT, "MACEVENT: %s, RA %s\n", event_name, eabuf);
		break;

	case BRCMF_E_SCAN_COMPLETE:
	case BRCMF_E_PMKID_CACHE:
		brcmf_dbg(EVENT, "MACEVENT: %s\n", event_name);
		break;

	case BRCMF_E_PFN_NET_FOUND:
	case BRCMF_E_PFN_NET_LOST:
	case BRCMF_E_PFN_SCAN_COMPLETE:
		brcmf_dbg(EVENT, "PNOEVENT: %s\n", event_name);
		break;

	case BRCMF_E_PSK_SUP:
	case BRCMF_E_PRUNE:
		brcmf_dbg(EVENT, "MACEVENT: %s, status %d, reason %d\n",
			  event_name, (int)status, (int)reason);
		break;

	case BRCMF_E_TRACE:
		buf = (unsigned char *) event_data;
		memcpy(&hdr, buf, sizeof(struct msgtrace_hdr));

		if (hdr.version != MSGTRACE_VERSION) {
			brcmf_dbg(ERROR,
				  "MACEVENT: %s [unsupported version --> brcmf"
				  " version:%d dongle version:%d]\n",
				  event_name, MSGTRACE_VERSION, hdr.version);
			/* Reset datalen to avoid display below */
			datalen = 0;
			break;
		}

		/* There are 2 bytes available at the end of data */
		*(buf + sizeof(struct msgtrace_hdr)
			 + be16_to_cpu(hdr.len)) = '\0';

		if (be32_to_cpu(hdr.discarded_bytes)
		    || be32_to_cpu(hdr.discarded_printf))
			brcmf_dbg(ERROR,
				  "WLC_E_TRACE: [Discarded traces in dongle -->"
				  " discarded_bytes %d discarded_printf %d]\n",
				  be32_to_cpu(hdr.discarded_bytes),
				  be32_to_cpu(hdr.discarded_printf));

		nblost = be32_to_cpu(hdr.seqnum) - seqnum_prev - 1;
		if (nblost > 0)
			brcmf_dbg(ERROR, "WLC_E_TRACE: [Event lost --> seqnum "
				  " %d nblost %d\n", be32_to_cpu(hdr.seqnum),
				  nblost);
		seqnum_prev = be32_to_cpu(hdr.seqnum);

		/* Display the trace buffer. Advance from \n to \n to
		 * avoid display big
		 * printf (issue with Linux printk )
		 */
		p = (char *)&buf[sizeof(struct msgtrace_hdr)];
		while ((s = strstr(p, "\n")) != NULL) {
			*s = '\0';
			pr_debug("%s\n", p);
			p = s + 1;
		}
		pr_debug("%s\n", p);

		/* Reset datalen to avoid display below */
		datalen = 0;
		break;

	case BRCMF_E_RSSI:
		brcmf_dbg(EVENT, "MACEVENT: %s %d\n",
			  event_name, be32_to_cpu(*((__be32 *)event_data)));
		break;

	default:
		brcmf_dbg(EVENT,
			  "MACEVENT: %s %d, MAC %s, status %d, reason %d, "
			  "auth %d\n", event_name, event_type, eabuf,
			  (int)status, (int)reason, (int)auth_type);
		break;
	}

	/* show any appended data */
	if (datalen) {
		buf = (unsigned char *) event_data;
		brcmf_dbg(EVENT, " data (%d) : ", datalen);
		for (i = 0; i < datalen; i++)
			brcmf_dbg(EVENT, " 0x%02x ", *buf++);
		brcmf_dbg(EVENT, "\n");
	}
}
#endif				/* DEBUG */

int
brcmf_c_host_event(struct brcmf_pub *drvr, int *ifidx, void *pktdata,
		   struct brcmf_event_msg *event, void **data_ptr)
{
	/* check whether packet is a BRCM event pkt */
	struct brcmf_event *pvt_data = (struct brcmf_event *) pktdata;
	struct brcmf_if_event *ifevent;
	char *event_data;
	u32 type, status;
	u16 flags;
	int evlen;

	if (memcmp(BRCM_OUI, &pvt_data->hdr.oui[0], DOT11_OUI_LEN)) {
		brcmf_dbg(ERROR, "mismatched OUI, bailing\n");
		return -EBADE;
	}

	/* BRCM event pkt may be unaligned - use xxx_ua to load user_subtype. */
	if (get_unaligned_be16(&pvt_data->hdr.usr_subtype) !=
	    BCMILCP_BCM_SUBTYPE_EVENT) {
		brcmf_dbg(ERROR, "mismatched subtype, bailing\n");
		return -EBADE;
	}

	*data_ptr = &pvt_data[1];
	event_data = *data_ptr;

	/* memcpy since BRCM event pkt may be unaligned. */
	memcpy(event, &pvt_data->msg, sizeof(struct brcmf_event_msg));

	type = get_unaligned_be32(&event->event_type);
	flags = get_unaligned_be16(&event->flags);
	status = get_unaligned_be32(&event->status);
	evlen = get_unaligned_be32(&event->datalen) +
		sizeof(struct brcmf_event);

	switch (type) {
	case BRCMF_E_IF:
		ifevent = (struct brcmf_if_event *) event_data;
		brcmf_dbg(TRACE, "if event\n");

		if (ifevent->ifidx > 0 && ifevent->ifidx < BRCMF_MAX_IFS) {
			if (ifevent->action == BRCMF_E_IF_ADD)
				brcmf_add_if(drvr->dev, ifevent->ifidx,
					     event->ifname,
					     pvt_data->eth.h_dest);
			else
				brcmf_del_if(drvr, ifevent->ifidx);
		} else {
			brcmf_dbg(ERROR, "Invalid ifidx %d for %s\n",
				  ifevent->ifidx, event->ifname);
		}

		/* send up the if event: btamp user needs it */
		*ifidx = brcmf_ifname2idx(drvr, event->ifname);
		break;

		/* These are what external supplicant/authenticator wants */
	case BRCMF_E_LINK:
	case BRCMF_E_ASSOC_IND:
	case BRCMF_E_REASSOC_IND:
	case BRCMF_E_DISASSOC_IND:
	case BRCMF_E_MIC_ERROR:
	default:
		/* Fall through: this should get _everything_  */

		*ifidx = brcmf_ifname2idx(drvr, event->ifname);
		brcmf_dbg(TRACE, "MAC event %d, flags %x, status %x\n",
			  type, flags, status);

		/* put it back to BRCMF_E_NDIS_LINK */
		if (type == BRCMF_E_NDIS_LINK) {
			u32 temp1;
			__be32 temp2;

			temp1 = get_unaligned_be32(&event->event_type);
			brcmf_dbg(TRACE, "Converted to WLC_E_LINK type %d\n",
				  temp1);

			temp2 = cpu_to_be32(BRCMF_E_NDIS_LINK);
			memcpy((void *)(&pvt_data->msg.event_type), &temp2,
			       sizeof(pvt_data->msg.event_type));
		}
		break;
	}

#ifdef DEBUG
	brcmf_c_show_host_event(event, event_data);
#endif				/* DEBUG */

	return 0;
}

/* Convert user's input in hex pattern to byte-size mask */
static int brcmf_c_pattern_atoh(char *src, char *dst)
{
	int i;
	if (strncmp(src, "0x", 2) != 0 && strncmp(src, "0X", 2) != 0) {
		brcmf_dbg(ERROR, "Mask invalid format. Needs to start with 0x\n");
		return -EINVAL;
	}
	src = src + 2;		/* Skip past 0x */
	if (strlen(src) % 2 != 0) {
		brcmf_dbg(ERROR, "Mask invalid format. Length must be even.\n");
		return -EINVAL;
	}
	for (i = 0; *src != '\0'; i++) {
		unsigned long res;
		char num[3];
		strncpy(num, src, 2);
		num[2] = '\0';
		if (kstrtoul(num, 16, &res))
			return -EINVAL;
		dst[i] = (u8)res;
		src += 2;
	}
	return i;
}

void
brcmf_c_pktfilter_offload_enable(struct brcmf_pub *drvr, char *arg, int enable,
			     int master_mode)
{
	unsigned long res;
	char *argv[8];
	int i = 0;
	const char *str;
	int buf_len;
	int str_len;
	char *arg_save = NULL, *arg_org = NULL;
	int rc;
	char buf[128];
	struct brcmf_pkt_filter_enable_le enable_parm;
	struct brcmf_pkt_filter_enable_le *pkt_filterp;
	__le32 mmode_le;

	arg_save = kmalloc(strlen(arg) + 1, GFP_ATOMIC);
	if (!arg_save)
		goto fail;

	arg_org = arg_save;
	memcpy(arg_save, arg, strlen(arg) + 1);

	argv[i] = strsep(&arg_save, " ");

	i = 0;
	if (NULL == argv[i]) {
		brcmf_dbg(ERROR, "No args provided\n");
		goto fail;
	}

	str = "pkt_filter_enable";
	str_len = strlen(str);
	strncpy(buf, str, str_len);
	buf[str_len] = '\0';
	buf_len = str_len + 1;

	pkt_filterp = (struct brcmf_pkt_filter_enable_le *) (buf + str_len + 1);

	/* Parse packet filter id. */
	enable_parm.id = 0;
	if (!kstrtoul(argv[i], 0, &res))
		enable_parm.id = cpu_to_le32((u32)res);

	/* Parse enable/disable value. */
	enable_parm.enable = cpu_to_le32(enable);

	buf_len += sizeof(enable_parm);
	memcpy((char *)pkt_filterp, &enable_parm, sizeof(enable_parm));

	/* Enable/disable the specified filter. */
	rc = brcmf_proto_cdc_set_dcmd(drvr, 0, BRCMF_C_SET_VAR, buf, buf_len);
	rc = rc >= 0 ? 0 : rc;
	if (rc)
		brcmf_dbg(TRACE, "failed to add pktfilter %s, retcode = %d\n",
			  arg, rc);
	else
		brcmf_dbg(TRACE, "successfully added pktfilter %s\n", arg);

	/* Contorl the master mode */
	mmode_le = cpu_to_le32(master_mode);
	brcmf_c_mkiovar("pkt_filter_mode", (char *)&mmode_le, 4, buf,
		    sizeof(buf));
	rc = brcmf_proto_cdc_set_dcmd(drvr, 0, BRCMF_C_SET_VAR, buf,
				       sizeof(buf));
	rc = rc >= 0 ? 0 : rc;
	if (rc)
		brcmf_dbg(TRACE, "failed to add pktfilter %s, retcode = %d\n",
			  arg, rc);

fail:
	kfree(arg_org);
}

void brcmf_c_pktfilter_offload_set(struct brcmf_pub *drvr, char *arg)
{
	const char *str;
	struct brcmf_pkt_filter_le pkt_filter;
	struct brcmf_pkt_filter_le *pkt_filterp;
	unsigned long res;
	int buf_len;
	int str_len;
	int rc;
	u32 mask_size;
	u32 pattern_size;
	char *argv[8], *buf = NULL;
	int i = 0;
	char *arg_save = NULL, *arg_org = NULL;

	arg_save = kstrdup(arg, GFP_ATOMIC);
	if (!arg_save)
		goto fail;

	arg_org = arg_save;

	buf = kmalloc(PKTFILTER_BUF_SIZE, GFP_ATOMIC);
	if (!buf)
		goto fail;

	argv[i] = strsep(&arg_save, " ");
	while (argv[i++])
		argv[i] = strsep(&arg_save, " ");

	i = 0;
	if (NULL == argv[i]) {
		brcmf_dbg(ERROR, "No args provided\n");
		goto fail;
	}

	str = "pkt_filter_add";
	strcpy(buf, str);
	str_len = strlen(str);
	buf_len = str_len + 1;

	pkt_filterp = (struct brcmf_pkt_filter_le *) (buf + str_len + 1);

	/* Parse packet filter id. */
	pkt_filter.id = 0;
	if (!kstrtoul(argv[i], 0, &res))
		pkt_filter.id = cpu_to_le32((u32)res);

	if (NULL == argv[++i]) {
		brcmf_dbg(ERROR, "Polarity not provided\n");
		goto fail;
	}

	/* Parse filter polarity. */
	pkt_filter.negate_match = 0;
	if (!kstrtoul(argv[i], 0, &res))
		pkt_filter.negate_match = cpu_to_le32((u32)res);

	if (NULL == argv[++i]) {
		brcmf_dbg(ERROR, "Filter type not provided\n");
		goto fail;
	}

	/* Parse filter type. */
	pkt_filter.type = 0;
	if (!kstrtoul(argv[i], 0, &res))
		pkt_filter.type = cpu_to_le32((u32)res);

	if (NULL == argv[++i]) {
		brcmf_dbg(ERROR, "Offset not provided\n");
		goto fail;
	}

	/* Parse pattern filter offset. */
	pkt_filter.u.pattern.offset = 0;
	if (!kstrtoul(argv[i], 0, &res))
		pkt_filter.u.pattern.offset = cpu_to_le32((u32)res);

	if (NULL == argv[++i]) {
		brcmf_dbg(ERROR, "Bitmask not provided\n");
		goto fail;
	}

	/* Parse pattern filter mask. */
	mask_size =
	    brcmf_c_pattern_atoh
		   (argv[i], (char *)pkt_filterp->u.pattern.mask_and_pattern);

	if (NULL == argv[++i]) {
		brcmf_dbg(ERROR, "Pattern not provided\n");
		goto fail;
	}

	/* Parse pattern filter pattern. */
	pattern_size =
	    brcmf_c_pattern_atoh(argv[i],
				   (char *)&pkt_filterp->u.pattern.
				   mask_and_pattern[mask_size]);

	if (mask_size != pattern_size) {
		brcmf_dbg(ERROR, "Mask and pattern not the same size\n");
		goto fail;
	}

	pkt_filter.u.pattern.size_bytes = cpu_to_le32(mask_size);
	buf_len += BRCMF_PKT_FILTER_FIXED_LEN;
	buf_len += (BRCMF_PKT_FILTER_PATTERN_FIXED_LEN + 2 * mask_size);

	/* Keep-alive attributes are set in local
	 * variable (keep_alive_pkt), and
	 ** then memcpy'ed into buffer (keep_alive_pktp) since there is no
	 ** guarantee that the buffer is properly aligned.
	 */
	memcpy((char *)pkt_filterp,
	       &pkt_filter,
	       BRCMF_PKT_FILTER_FIXED_LEN + BRCMF_PKT_FILTER_PATTERN_FIXED_LEN);

	rc = brcmf_proto_cdc_set_dcmd(drvr, 0, BRCMF_C_SET_VAR, buf, buf_len);
	rc = rc >= 0 ? 0 : rc;

	if (rc)
		brcmf_dbg(TRACE, "failed to add pktfilter %s, retcode = %d\n",
			  arg, rc);
	else
		brcmf_dbg(TRACE, "successfully added pktfilter %s\n", arg);

fail:
	kfree(arg_org);

	kfree(buf);
}

static void brcmf_c_arp_offload_set(struct brcmf_pub *drvr, int arp_mode)
{
	char iovbuf[32];
	int retcode;

	brcmf_c_mkiovar("arp_ol", (char *)&arp_mode, 4, iovbuf, sizeof(iovbuf));
	retcode = brcmf_proto_cdc_set_dcmd(drvr, 0, BRCMF_C_SET_VAR,
				   iovbuf, sizeof(iovbuf));
	retcode = retcode >= 0 ? 0 : retcode;
	if (retcode)
		brcmf_dbg(TRACE, "failed to set ARP offload mode to 0x%x, retcode = %d\n",
			  arp_mode, retcode);
	else
		brcmf_dbg(TRACE, "successfully set ARP offload mode to 0x%x\n",
			  arp_mode);
}

static void brcmf_c_arp_offload_enable(struct brcmf_pub *drvr, int arp_enable)
{
	char iovbuf[32];
	int retcode;

	brcmf_c_mkiovar("arpoe", (char *)&arp_enable, 4,
			iovbuf, sizeof(iovbuf));
	retcode = brcmf_proto_cdc_set_dcmd(drvr, 0, BRCMF_C_SET_VAR,
				   iovbuf, sizeof(iovbuf));
	retcode = retcode >= 0 ? 0 : retcode;
	if (retcode)
		brcmf_dbg(TRACE, "failed to enable ARP offload to %d, retcode = %d\n",
			  arp_enable, retcode);
	else
		brcmf_dbg(TRACE, "successfully enabled ARP offload to %d\n",
			  arp_enable);
}

int brcmf_c_preinit_dcmds(struct brcmf_pub *drvr)
{
	char iovbuf[BRCMF_EVENTING_MASK_LEN + 12];	/*  Room for
				 "event_msgs" + '\0' + bitvec  */
	uint up = 0;
	char buf[128], *ptr;
	u32 dongle_align = drvr->bus_if->align;
	u32 glom = 0;
	u32 roaming = 1;
	uint bcn_timeout = 3;
	int scan_assoc_time = 40;
	int scan_unassoc_time = 40;
	int i;

	mutex_lock(&drvr->proto_block);

	/* Set Country code */
	if (drvr->country_code[0] != 0) {
		if (brcmf_proto_cdc_set_dcmd(drvr, 0, BRCMF_C_SET_COUNTRY,
					      drvr->country_code,
					      sizeof(drvr->country_code)) < 0)
			brcmf_dbg(ERROR, "country code setting failed\n");
	}

	/* query for 'ver' to get version info from firmware */
	memset(buf, 0, sizeof(buf));
	ptr = buf;
	brcmf_c_mkiovar("ver", NULL, 0, buf, sizeof(buf));
	brcmf_proto_cdc_query_dcmd(drvr, 0, BRCMF_C_GET_VAR, buf, sizeof(buf));
	strsep(&ptr, "\n");
	/* Print fw version info */
	brcmf_dbg(ERROR, "Firmware version = %s\n", buf);

	/* Match Host and Dongle rx alignment */
	brcmf_c_mkiovar("bus:txglomalign", (char *)&dongle_align, 4, iovbuf,
		    sizeof(iovbuf));
	brcmf_proto_cdc_set_dcmd(drvr, 0, BRCMF_C_SET_VAR, iovbuf,
				  sizeof(iovbuf));

	/* disable glom option per default */
	brcmf_c_mkiovar("bus:txglom", (char *)&glom, 4, iovbuf, sizeof(iovbuf));
	brcmf_proto_cdc_set_dcmd(drvr, 0, BRCMF_C_SET_VAR, iovbuf,
				  sizeof(iovbuf));

	/* Setup timeout if Beacons are lost and roam is off to report
		 link down */
	brcmf_c_mkiovar("bcn_timeout", (char *)&bcn_timeout, 4, iovbuf,
		    sizeof(iovbuf));
	brcmf_proto_cdc_set_dcmd(drvr, 0, BRCMF_C_SET_VAR, iovbuf,
				  sizeof(iovbuf));

	/* Enable/Disable build-in roaming to allowed ext supplicant to take
		 of romaing */
	brcmf_c_mkiovar("roam_off", (char *)&roaming, 4,
		      iovbuf, sizeof(iovbuf));
	brcmf_proto_cdc_set_dcmd(drvr, 0, BRCMF_C_SET_VAR, iovbuf,
				  sizeof(iovbuf));

	/* Force STA UP */
	brcmf_proto_cdc_set_dcmd(drvr, 0, BRCMF_C_UP, (char *)&up, sizeof(up));

	/* Setup event_msgs */
	brcmf_c_mkiovar("event_msgs", drvr->eventmask, BRCMF_EVENTING_MASK_LEN,
		      iovbuf, sizeof(iovbuf));
	brcmf_proto_cdc_set_dcmd(drvr, 0, BRCMF_C_SET_VAR, iovbuf,
				  sizeof(iovbuf));

	brcmf_proto_cdc_set_dcmd(drvr, 0, BRCMF_C_SET_SCAN_CHANNEL_TIME,
			 (char *)&scan_assoc_time, sizeof(scan_assoc_time));
	brcmf_proto_cdc_set_dcmd(drvr, 0, BRCMF_C_SET_SCAN_UNASSOC_TIME,
			 (char *)&scan_unassoc_time, sizeof(scan_unassoc_time));

	/* Set and enable ARP offload feature */
	brcmf_c_arp_offload_set(drvr, BRCMF_ARPOL_MODE);
	brcmf_c_arp_offload_enable(drvr, true);

	/* Set up pkt filter */
	for (i = 0; i < drvr->pktfilter_count; i++) {
		brcmf_c_pktfilter_offload_set(drvr, drvr->pktfilter[i]);
		brcmf_c_pktfilter_offload_enable(drvr, drvr->pktfilter[i],
						 0, true);
	}

	mutex_unlock(&drvr->proto_block);

	return 0;
}