summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/brcm80211/brcmfmac/dhd_linux.c
blob: c06cea88df0dbcaf55b7b9078810c71e0c5f8851 (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
/*
 * 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.
 */

#include <linux/kernel.h>
#include <linux/etherdevice.h>
#include <linux/module.h>
#include <net/cfg80211.h>
#include <net/rtnetlink.h>
#include <brcmu_utils.h>
#include <brcmu_wifi.h>

#include "dhd.h"
#include "dhd_bus.h"
#include "dhd_proto.h"
#include "dhd_dbg.h"
#include "fwil_types.h"
#include "p2p.h"
#include "wl_cfg80211.h"
#include "fwil.h"

MODULE_AUTHOR("Broadcom Corporation");
MODULE_DESCRIPTION("Broadcom 802.11 wireless LAN fullmac driver.");
MODULE_SUPPORTED_DEVICE("Broadcom 802.11 WLAN fullmac cards");
MODULE_LICENSE("Dual BSD/GPL");

#define MAX_WAIT_FOR_8021X_TX		50	/* msecs */

/* Error bits */
int brcmf_msg_level;
module_param(brcmf_msg_level, int, 0);

/* P2P0 enable */
static int brcmf_p2p_enable;
#ifdef CONFIG_BRCMDBG
module_param_named(p2pon, brcmf_p2p_enable, int, 0);
MODULE_PARM_DESC(p2pon, "enable p2p management functionality");
#endif

char *brcmf_ifname(struct brcmf_pub *drvr, int ifidx)
{
	if (ifidx < 0 || ifidx >= BRCMF_MAX_IFS) {
		brcmf_err("ifidx %d out of range\n", ifidx);
		return "<if_bad>";
	}

	if (drvr->iflist[ifidx] == NULL) {
		brcmf_err("null i/f %d\n", ifidx);
		return "<if_null>";
	}

	if (drvr->iflist[ifidx]->ndev)
		return drvr->iflist[ifidx]->ndev->name;

	return "<if_none>";
}

static void _brcmf_set_multicast_list(struct work_struct *work)
{
	struct brcmf_if *ifp;
	struct net_device *ndev;
	struct netdev_hw_addr *ha;
	u32 cmd_value, cnt;
	__le32 cnt_le;
	char *buf, *bufp;
	u32 buflen;
	s32 err;

	ifp = container_of(work, struct brcmf_if, multicast_work);

	brcmf_dbg(TRACE, "Enter, idx=%d\n", ifp->bssidx);

	ndev = ifp->ndev;

	/* Determine initial value of allmulti flag */
	cmd_value = (ndev->flags & IFF_ALLMULTI) ? true : false;

	/* Send down the multicast list first. */
	cnt = netdev_mc_count(ndev);
	buflen = sizeof(cnt) + (cnt * ETH_ALEN);
	buf = kmalloc(buflen, GFP_ATOMIC);
	if (!buf)
		return;
	bufp = buf;

	cnt_le = cpu_to_le32(cnt);
	memcpy(bufp, &cnt_le, sizeof(cnt_le));
	bufp += sizeof(cnt_le);

	netdev_for_each_mc_addr(ha, ndev) {
		if (!cnt)
			break;
		memcpy(bufp, ha->addr, ETH_ALEN);
		bufp += ETH_ALEN;
		cnt--;
	}

	err = brcmf_fil_iovar_data_set(ifp, "mcast_list", buf, buflen);
	if (err < 0) {
		brcmf_err("Setting mcast_list failed, %d\n", err);
		cmd_value = cnt ? true : cmd_value;
	}

	kfree(buf);

	/*
	 * Now send the allmulti setting.  This is based on the setting in the
	 * net_device flags, but might be modified above to be turned on if we
	 * were trying to set some addresses and dongle rejected it...
	 */
	err = brcmf_fil_iovar_int_set(ifp, "allmulti", cmd_value);
	if (err < 0)
		brcmf_err("Setting allmulti failed, %d\n", err);

	/*Finally, pick up the PROMISC flag */
	cmd_value = (ndev->flags & IFF_PROMISC) ? true : false;
	err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_PROMISC, cmd_value);
	if (err < 0)
		brcmf_err("Setting BRCMF_C_SET_PROMISC failed, %d\n",
			  err);
}

static void
_brcmf_set_mac_address(struct work_struct *work)
{
	struct brcmf_if *ifp;
	s32 err;

	ifp = container_of(work, struct brcmf_if, setmacaddr_work);

	brcmf_dbg(TRACE, "Enter, idx=%d\n", ifp->bssidx);

	err = brcmf_fil_iovar_data_set(ifp, "cur_etheraddr", ifp->mac_addr,
				       ETH_ALEN);
	if (err < 0) {
		brcmf_err("Setting cur_etheraddr failed, %d\n", err);
	} else {
		brcmf_dbg(TRACE, "MAC address updated to %pM\n",
			  ifp->mac_addr);
		memcpy(ifp->ndev->dev_addr, ifp->mac_addr, ETH_ALEN);
	}
}

static int brcmf_netdev_set_mac_address(struct net_device *ndev, void *addr)
{
	struct brcmf_if *ifp = netdev_priv(ndev);
	struct sockaddr *sa = (struct sockaddr *)addr;

	memcpy(&ifp->mac_addr, sa->sa_data, ETH_ALEN);
	schedule_work(&ifp->setmacaddr_work);
	return 0;
}

static void brcmf_netdev_set_multicast_list(struct net_device *ndev)
{
	struct brcmf_if *ifp = netdev_priv(ndev);

	schedule_work(&ifp->multicast_work);
}

static netdev_tx_t brcmf_netdev_start_xmit(struct sk_buff *skb,
					   struct net_device *ndev)
{
	int ret;
	struct brcmf_if *ifp = netdev_priv(ndev);
	struct brcmf_pub *drvr = ifp->drvr;
	struct ethhdr *eh;

	brcmf_dbg(TRACE, "Enter, idx=%d\n", ifp->bssidx);

	/* Can the device send data? */
	if (drvr->bus_if->state != BRCMF_BUS_DATA) {
		brcmf_err("xmit rejected state=%d\n", drvr->bus_if->state);
		netif_stop_queue(ndev);
		dev_kfree_skb(skb);
		ret = -ENODEV;
		goto done;
	}

	if (!drvr->iflist[ifp->bssidx]) {
		brcmf_err("bad ifidx %d\n", ifp->bssidx);
		netif_stop_queue(ndev);
		dev_kfree_skb(skb);
		ret = -ENODEV;
		goto done;
	}

	/* Make sure there's enough room for any header */
	if (skb_headroom(skb) < drvr->hdrlen) {
		struct sk_buff *skb2;

		brcmf_dbg(INFO, "%s: insufficient headroom\n",
			  brcmf_ifname(drvr, ifp->bssidx));
		drvr->bus_if->tx_realloc++;
		skb2 = skb_realloc_headroom(skb, drvr->hdrlen);
		dev_kfree_skb(skb);
		skb = skb2;
		if (skb == NULL) {
			brcmf_err("%s: skb_realloc_headroom failed\n",
				  brcmf_ifname(drvr, ifp->bssidx));
			ret = -ENOMEM;
			goto done;
		}
	}

	/* validate length for ether packet */
	if (skb->len < sizeof(*eh)) {
		ret = -EINVAL;
		dev_kfree_skb(skb);
		goto done;
	}

	/* handle ethernet header */
	eh = (struct ethhdr *)(skb->data);
	if (is_multicast_ether_addr(eh->h_dest))
		drvr->tx_multicast++;
	if (ntohs(eh->h_proto) == ETH_P_PAE)
		atomic_inc(&ifp->pend_8021x_cnt);

	/* If the protocol uses a data header, apply it */
	brcmf_proto_hdrpush(drvr, ifp->ifidx, skb);

	/* Use bus module to send data frame */
	ret =  brcmf_bus_txdata(drvr->bus_if, skb);

done:
	if (ret) {
		ifp->stats.tx_dropped++;
	} else {
		ifp->stats.tx_packets++;
		ifp->stats.tx_bytes += skb->len;
	}

	/* Return ok: we always eat the packet */
	return NETDEV_TX_OK;
}

void brcmf_txflowblock(struct device *dev, bool state)
{
	struct net_device *ndev;
	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
	struct brcmf_pub *drvr = bus_if->drvr;
	int i;

	brcmf_dbg(TRACE, "Enter\n");

	for (i = 0; i < BRCMF_MAX_IFS; i++)
		if (drvr->iflist[i]) {
			ndev = drvr->iflist[i]->ndev;
			if (state)
				netif_stop_queue(ndev);
			else
				netif_wake_queue(ndev);
		}
}

void brcmf_rx_frames(struct device *dev, struct sk_buff_head *skb_list)
{
	unsigned char *eth;
	uint len;
	struct sk_buff *skb, *pnext;
	struct brcmf_if *ifp;
	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
	struct brcmf_pub *drvr = bus_if->drvr;
	u8 ifidx;
	int ret;

	brcmf_dbg(TRACE, "Enter\n");

	skb_queue_walk_safe(skb_list, skb, pnext) {
		skb_unlink(skb, skb_list);

		/* process and remove protocol-specific header */
		ret = brcmf_proto_hdrpull(drvr, &ifidx, skb);
		ifp = drvr->iflist[ifidx];

		if (ret || !ifp || !ifp->ndev) {
			if ((ret != -ENODATA) && ifp)
				ifp->stats.rx_errors++;
			brcmu_pkt_buf_free_skb(skb);
			continue;
		}

		/* Get the protocol, maintain skb around eth_type_trans()
		 * The main reason for this hack is for the limitation of
		 * Linux 2.4 where 'eth_type_trans' uses the
		 * 'net->hard_header_len'
		 * to perform skb_pull inside vs ETH_HLEN. Since to avoid
		 * coping of the packet coming from the network stack to add
		 * BDC, Hardware header etc, during network interface
		 * registration
		 * we set the 'net->hard_header_len' to ETH_HLEN + extra space
		 * required
		 * for BDC, Hardware header etc. and not just the ETH_HLEN
		 */
		eth = skb->data;
		len = skb->len;

		skb->dev = ifp->ndev;
		skb->protocol = eth_type_trans(skb, skb->dev);

		if (skb->pkt_type == PACKET_MULTICAST)
			ifp->stats.multicast++;

		skb->data = eth;
		skb->len = len;

		/* Strip header, count, deliver upward */
		skb_pull(skb, ETH_HLEN);

		/* Process special event packets and then discard them */
		brcmf_fweh_process_skb(drvr, skb, &ifidx);

		if (drvr->iflist[ifidx]) {
			ifp = drvr->iflist[ifidx];
			ifp->ndev->last_rx = jiffies;
		}

		if (!(ifp->ndev->flags & IFF_UP)) {
			brcmu_pkt_buf_free_skb(skb);
			continue;
		}

		ifp->stats.rx_bytes += skb->len;
		ifp->stats.rx_packets++;

		if (in_interrupt())
			netif_rx(skb);
		else
			/* If the receive is not processed inside an ISR,
			 * the softirqd must be woken explicitly to service
			 * the NET_RX_SOFTIRQ.  In 2.6 kernels, this is handled
			 * by netif_rx_ni(), but in earlier kernels, we need
			 * to do it manually.
			 */
			netif_rx_ni(skb);
	}
}

void brcmf_txcomplete(struct device *dev, struct sk_buff *txp, bool success)
{
	u8 ifidx;
	struct ethhdr *eh;
	u16 type;
	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
	struct brcmf_pub *drvr = bus_if->drvr;
	struct brcmf_if *ifp;

	brcmf_proto_hdrpull(drvr, &ifidx, txp);

	ifp = drvr->iflist[ifidx];
	if (!ifp)
		return;

	eh = (struct ethhdr *)(txp->data);
	type = ntohs(eh->h_proto);

	if (type == ETH_P_PAE) {
		atomic_dec(&ifp->pend_8021x_cnt);
		if (waitqueue_active(&ifp->pend_8021x_wait))
			wake_up(&ifp->pend_8021x_wait);
	}
	if (!success)
		ifp->stats.tx_errors++;
}

static struct net_device_stats *brcmf_netdev_get_stats(struct net_device *ndev)
{
	struct brcmf_if *ifp = netdev_priv(ndev);

	brcmf_dbg(TRACE, "Enter, idx=%d\n", ifp->bssidx);

	return &ifp->stats;
}

/*
 * Set current toe component enables in toe_ol iovar,
 * and set toe global enable iovar
 */
static int brcmf_toe_set(struct brcmf_if *ifp, u32 toe_ol)
{
	s32 err;

	err = brcmf_fil_iovar_int_set(ifp, "toe_ol", toe_ol);
	if (err < 0) {
		brcmf_err("Setting toe_ol failed, %d\n", err);
		return err;
	}

	err = brcmf_fil_iovar_int_set(ifp, "toe", (toe_ol != 0));
	if (err < 0)
		brcmf_err("Setting toe failed, %d\n", err);

	return err;

}

static void brcmf_ethtool_get_drvinfo(struct net_device *ndev,
				    struct ethtool_drvinfo *info)
{
	struct brcmf_if *ifp = netdev_priv(ndev);
	struct brcmf_pub *drvr = ifp->drvr;

	strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
	snprintf(info->version, sizeof(info->version), "%lu",
		 drvr->drv_version);
	strlcpy(info->bus_info, dev_name(drvr->bus_if->dev),
		sizeof(info->bus_info));
}

static const struct ethtool_ops brcmf_ethtool_ops = {
	.get_drvinfo = brcmf_ethtool_get_drvinfo,
};

static int brcmf_ethtool(struct brcmf_if *ifp, void __user *uaddr)
{
	struct brcmf_pub *drvr = ifp->drvr;
	struct ethtool_drvinfo info;
	char drvname[sizeof(info.driver)];
	u32 cmd;
	struct ethtool_value edata;
	u32 toe_cmpnt, csum_dir;
	int ret;

	brcmf_dbg(TRACE, "Enter, idx=%d\n", ifp->bssidx);

	/* all ethtool calls start with a cmd word */
	if (copy_from_user(&cmd, uaddr, sizeof(u32)))
		return -EFAULT;

	switch (cmd) {
	case ETHTOOL_GDRVINFO:
		/* Copy out any request driver name */
		if (copy_from_user(&info, uaddr, sizeof(info)))
			return -EFAULT;
		strncpy(drvname, info.driver, sizeof(info.driver));
		drvname[sizeof(info.driver) - 1] = '\0';

		/* clear struct for return */
		memset(&info, 0, sizeof(info));
		info.cmd = cmd;

		/* if requested, identify ourselves */
		if (strcmp(drvname, "?dhd") == 0) {
			sprintf(info.driver, "dhd");
			strcpy(info.version, BRCMF_VERSION_STR);
		}
		/* report dongle driver type */
		else
			sprintf(info.driver, "wl");

		sprintf(info.version, "%lu", drvr->drv_version);
		if (copy_to_user(uaddr, &info, sizeof(info)))
			return -EFAULT;
		brcmf_dbg(TRACE, "given %*s, returning %s\n",
			  (int)sizeof(drvname), drvname, info.driver);
		break;

		/* Get toe offload components from dongle */
	case ETHTOOL_GRXCSUM:
	case ETHTOOL_GTXCSUM:
		ret = brcmf_fil_iovar_int_get(ifp, "toe_ol", &toe_cmpnt);
		if (ret < 0)
			return ret;

		csum_dir =
		    (cmd == ETHTOOL_GTXCSUM) ? TOE_TX_CSUM_OL : TOE_RX_CSUM_OL;

		edata.cmd = cmd;
		edata.data = (toe_cmpnt & csum_dir) ? 1 : 0;

		if (copy_to_user(uaddr, &edata, sizeof(edata)))
			return -EFAULT;
		break;

		/* Set toe offload components in dongle */
	case ETHTOOL_SRXCSUM:
	case ETHTOOL_STXCSUM:
		if (copy_from_user(&edata, uaddr, sizeof(edata)))
			return -EFAULT;

		/* Read the current settings, update and write back */
		ret = brcmf_fil_iovar_int_get(ifp, "toe_ol", &toe_cmpnt);
		if (ret < 0)
			return ret;

		csum_dir =
		    (cmd == ETHTOOL_STXCSUM) ? TOE_TX_CSUM_OL : TOE_RX_CSUM_OL;

		if (edata.data != 0)
			toe_cmpnt |= csum_dir;
		else
			toe_cmpnt &= ~csum_dir;

		ret = brcmf_toe_set(ifp, toe_cmpnt);
		if (ret < 0)
			return ret;

		/* If setting TX checksum mode, tell Linux the new mode */
		if (cmd == ETHTOOL_STXCSUM) {
			if (edata.data)
				ifp->ndev->features |= NETIF_F_IP_CSUM;
			else
				ifp->ndev->features &= ~NETIF_F_IP_CSUM;
		}

		break;

	default:
		return -EOPNOTSUPP;
	}

	return 0;
}

static int brcmf_netdev_ioctl_entry(struct net_device *ndev, struct ifreq *ifr,
				    int cmd)
{
	struct brcmf_if *ifp = netdev_priv(ndev);
	struct brcmf_pub *drvr = ifp->drvr;

	brcmf_dbg(TRACE, "Enter, idx=%d, cmd=0x%04x\n", ifp->bssidx, cmd);

	if (!drvr->iflist[ifp->bssidx])
		return -1;

	if (cmd == SIOCETHTOOL)
		return brcmf_ethtool(ifp, ifr->ifr_data);

	return -EOPNOTSUPP;
}

static int brcmf_netdev_stop(struct net_device *ndev)
{
	struct brcmf_if *ifp = netdev_priv(ndev);

	brcmf_dbg(TRACE, "Enter, idx=%d\n", ifp->bssidx);

	brcmf_cfg80211_down(ndev);

	/* Set state and stop OS transmissions */
	netif_stop_queue(ndev);

	return 0;
}

static int brcmf_netdev_open(struct net_device *ndev)
{
	struct brcmf_if *ifp = netdev_priv(ndev);
	struct brcmf_pub *drvr = ifp->drvr;
	struct brcmf_bus *bus_if = drvr->bus_if;
	u32 toe_ol;
	s32 ret = 0;

	brcmf_dbg(TRACE, "Enter, idx=%d\n", ifp->bssidx);

	/* If bus is not ready, can't continue */
	if (bus_if->state != BRCMF_BUS_DATA) {
		brcmf_err("failed bus is not ready\n");
		return -EAGAIN;
	}

	atomic_set(&ifp->pend_8021x_cnt, 0);

	/* Get current TOE mode from dongle */
	if (brcmf_fil_iovar_int_get(ifp, "toe_ol", &toe_ol) >= 0
	    && (toe_ol & TOE_TX_CSUM_OL) != 0)
		ndev->features |= NETIF_F_IP_CSUM;
	else
		ndev->features &= ~NETIF_F_IP_CSUM;

	/* Allow transmit calls */
	netif_start_queue(ndev);
	if (brcmf_cfg80211_up(ndev)) {
		brcmf_err("failed to bring up cfg80211\n");
		return -1;
	}

	return ret;
}

static const struct net_device_ops brcmf_netdev_ops_pri = {
	.ndo_open = brcmf_netdev_open,
	.ndo_stop = brcmf_netdev_stop,
	.ndo_get_stats = brcmf_netdev_get_stats,
	.ndo_do_ioctl = brcmf_netdev_ioctl_entry,
	.ndo_start_xmit = brcmf_netdev_start_xmit,
	.ndo_set_mac_address = brcmf_netdev_set_mac_address,
	.ndo_set_rx_mode = brcmf_netdev_set_multicast_list
};

int brcmf_net_attach(struct brcmf_if *ifp, bool rtnl_locked)
{
	struct brcmf_pub *drvr = ifp->drvr;
	struct net_device *ndev;
	s32 err;

	brcmf_dbg(TRACE, "Enter, idx=%d mac=%pM\n", ifp->bssidx,
		  ifp->mac_addr);
	ndev = ifp->ndev;

	/* set appropriate operations */
	ndev->netdev_ops = &brcmf_netdev_ops_pri;

	ndev->hard_header_len = ETH_HLEN + drvr->hdrlen;
	ndev->ethtool_ops = &brcmf_ethtool_ops;

	drvr->rxsz = ndev->mtu + ndev->hard_header_len +
			      drvr->hdrlen;

	/* set the mac address */
	memcpy(ndev->dev_addr, ifp->mac_addr, ETH_ALEN);

	INIT_WORK(&ifp->setmacaddr_work, _brcmf_set_mac_address);
	INIT_WORK(&ifp->multicast_work, _brcmf_set_multicast_list);

	if (rtnl_locked)
		err = register_netdevice(ndev);
	else
		err = register_netdev(ndev);
	if (err != 0) {
		brcmf_err("couldn't register the net device\n");
		goto fail;
	}

	brcmf_dbg(INFO, "%s: Broadcom Dongle Host Driver\n", ndev->name);

	return 0;

fail:
	ndev->netdev_ops = NULL;
	return -EBADE;
}

static int brcmf_net_p2p_open(struct net_device *ndev)
{
	brcmf_dbg(TRACE, "Enter\n");

	return brcmf_cfg80211_up(ndev);
}

static int brcmf_net_p2p_stop(struct net_device *ndev)
{
	brcmf_dbg(TRACE, "Enter\n");

	return brcmf_cfg80211_down(ndev);
}

static int brcmf_net_p2p_do_ioctl(struct net_device *ndev,
				  struct ifreq *ifr, int cmd)
{
	brcmf_dbg(TRACE, "Enter\n");
	return 0;
}

static netdev_tx_t brcmf_net_p2p_start_xmit(struct sk_buff *skb,
					    struct net_device *ndev)
{
	if (skb)
		dev_kfree_skb_any(skb);

	return NETDEV_TX_OK;
}

static const struct net_device_ops brcmf_netdev_ops_p2p = {
	.ndo_open = brcmf_net_p2p_open,
	.ndo_stop = brcmf_net_p2p_stop,
	.ndo_do_ioctl = brcmf_net_p2p_do_ioctl,
	.ndo_start_xmit = brcmf_net_p2p_start_xmit
};

static int brcmf_net_p2p_attach(struct brcmf_if *ifp)
{
	struct net_device *ndev;

	brcmf_dbg(TRACE, "Enter, idx=%d mac=%pM\n", ifp->bssidx,
		  ifp->mac_addr);
	ndev = ifp->ndev;

	ndev->netdev_ops = &brcmf_netdev_ops_p2p;

	/* set the mac address */
	memcpy(ndev->dev_addr, ifp->mac_addr, ETH_ALEN);

	if (register_netdev(ndev) != 0) {
		brcmf_err("couldn't register the p2p net device\n");
		goto fail;
	}

	brcmf_dbg(INFO, "%s: Broadcom Dongle Host Driver\n", ndev->name);

	return 0;

fail:
	return -EBADE;
}

struct brcmf_if *brcmf_add_if(struct brcmf_pub *drvr, s32 bssidx, s32 ifidx,
			      char *name, u8 *mac_addr)
{
	struct brcmf_if *ifp;
	struct net_device *ndev;

	brcmf_dbg(TRACE, "Enter, idx=%d, ifidx=%d\n", bssidx, ifidx);

	ifp = drvr->iflist[bssidx];
	/*
	 * Delete the existing interface before overwriting it
	 * in case we missed the BRCMF_E_IF_DEL event.
	 */
	if (ifp) {
		brcmf_err("ERROR: netdev:%s already exists\n",
			  ifp->ndev->name);
		if (ifidx) {
			netif_stop_queue(ifp->ndev);
			unregister_netdev(ifp->ndev);
			free_netdev(ifp->ndev);
			drvr->iflist[bssidx] = NULL;
		} else {
			brcmf_err("ignore IF event\n");
			return ERR_PTR(-EINVAL);
		}
	}

	/* Allocate netdev, including space for private structure */
	ndev = alloc_netdev(sizeof(struct brcmf_if), name, ether_setup);
	if (!ndev) {
		brcmf_err("OOM - alloc_netdev\n");
		return ERR_PTR(-ENOMEM);
	}

	ifp = netdev_priv(ndev);
	ifp->ndev = ndev;
	ifp->drvr = drvr;
	drvr->iflist[bssidx] = ifp;
	ifp->ifidx = ifidx;
	ifp->bssidx = bssidx;


	init_waitqueue_head(&ifp->pend_8021x_wait);

	if (mac_addr != NULL)
		memcpy(ifp->mac_addr, mac_addr, ETH_ALEN);

	brcmf_dbg(TRACE, " ==== pid:%x, if:%s (%pM) created ===\n",
		  current->pid, ifp->ndev->name, ifp->mac_addr);

	return ifp;
}

void brcmf_del_if(struct brcmf_pub *drvr, s32 bssidx)
{
	struct brcmf_if *ifp;

	ifp = drvr->iflist[bssidx];
	if (!ifp) {
		brcmf_err("Null interface, idx=%d\n", bssidx);
		return;
	}
	brcmf_dbg(TRACE, "Enter, idx=%d, ifidx=%d\n", bssidx, ifp->ifidx);
	if (ifp->ndev) {
		if (bssidx == 0) {
			if (ifp->ndev->netdev_ops == &brcmf_netdev_ops_pri) {
				rtnl_lock();
				brcmf_netdev_stop(ifp->ndev);
				rtnl_unlock();
			}
		} else {
			netif_stop_queue(ifp->ndev);
		}

		if (ifp->ndev->netdev_ops == &brcmf_netdev_ops_pri) {
			cancel_work_sync(&ifp->setmacaddr_work);
			cancel_work_sync(&ifp->multicast_work);
		}

		unregister_netdev(ifp->ndev);
		drvr->iflist[bssidx] = NULL;
		if (bssidx == 0)
			brcmf_cfg80211_detach(drvr->config);
		free_netdev(ifp->ndev);
	}
}

int brcmf_attach(uint bus_hdrlen, struct device *dev)
{
	struct brcmf_pub *drvr = NULL;
	int ret = 0;

	brcmf_dbg(TRACE, "Enter\n");

	/* Allocate primary brcmf_info */
	drvr = kzalloc(sizeof(struct brcmf_pub), GFP_ATOMIC);
	if (!drvr)
		return -ENOMEM;

	mutex_init(&drvr->proto_block);

	/* Link to bus module */
	drvr->hdrlen = bus_hdrlen;
	drvr->bus_if = dev_get_drvdata(dev);
	drvr->bus_if->drvr = drvr;

	/* create device debugfs folder */
	brcmf_debugfs_attach(drvr);

	/* Attach and link in the protocol */
	ret = brcmf_proto_attach(drvr);
	if (ret != 0) {
		brcmf_err("brcmf_prot_attach failed\n");
		goto fail;
	}

	/* attach firmware event handler */
	brcmf_fweh_attach(drvr);

	INIT_LIST_HEAD(&drvr->bus_if->dcmd_list);

	return ret;

fail:
	brcmf_detach(dev);

	return ret;
}

int brcmf_bus_start(struct device *dev)
{
	int ret = -1;
	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
	struct brcmf_pub *drvr = bus_if->drvr;
	struct brcmf_if *ifp;
	struct brcmf_if *p2p_ifp;

	brcmf_dbg(TRACE, "\n");

	/* Bring up the bus */
	ret = brcmf_bus_init(bus_if);
	if (ret != 0) {
		brcmf_err("brcmf_sdbrcm_bus_init failed %d\n", ret);
		return ret;
	}

	/* add primary networking interface */
	ifp = brcmf_add_if(drvr, 0, 0, "wlan%d", NULL);
	if (IS_ERR(ifp))
		return PTR_ERR(ifp);

	if (brcmf_p2p_enable)
		p2p_ifp = brcmf_add_if(drvr, 1, 0, "p2p%d", NULL);
	else
		p2p_ifp = NULL;
	if (IS_ERR(p2p_ifp))
		p2p_ifp = NULL;

	/* signal bus ready */
	bus_if->state = BRCMF_BUS_DATA;

	/* Bus is ready, do any initialization */
	ret = brcmf_c_preinit_dcmds(ifp);
	if (ret < 0)
		goto fail;

	drvr->config = brcmf_cfg80211_attach(drvr, bus_if->dev);
	if (drvr->config == NULL) {
		ret = -ENOMEM;
		goto fail;
	}

	ret = brcmf_fweh_activate_events(ifp);
	if (ret < 0)
		goto fail;

	ret = brcmf_net_attach(ifp, false);
fail:
	if (ret < 0) {
		brcmf_err("failed: %d\n", ret);
		if (drvr->config)
			brcmf_cfg80211_detach(drvr->config);
		free_netdev(ifp->ndev);
		drvr->iflist[0] = NULL;
		if (p2p_ifp) {
			free_netdev(p2p_ifp->ndev);
			drvr->iflist[1] = NULL;
		}
		return ret;
	}
	if ((brcmf_p2p_enable) && (p2p_ifp))
		brcmf_net_p2p_attach(p2p_ifp);

	return 0;
}

static void brcmf_bus_detach(struct brcmf_pub *drvr)
{
	brcmf_dbg(TRACE, "Enter\n");

	if (drvr) {
		/* Stop the protocol module */
		brcmf_proto_stop(drvr);

		/* Stop the bus module */
		brcmf_bus_stop(drvr->bus_if);
	}
}

void brcmf_dev_reset(struct device *dev)
{
	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
	struct brcmf_pub *drvr = bus_if->drvr;

	if (drvr == NULL)
		return;

	if (drvr->iflist[0])
		brcmf_fil_cmd_int_set(drvr->iflist[0], BRCMF_C_TERMINATED, 1);
}

void brcmf_detach(struct device *dev)
{
	s32 i;
	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
	struct brcmf_pub *drvr = bus_if->drvr;

	brcmf_dbg(TRACE, "Enter\n");

	if (drvr == NULL)
		return;

	/* stop firmware event handling */
	brcmf_fweh_detach(drvr);

	/* make sure primary interface removed last */
	for (i = BRCMF_MAX_IFS-1; i > -1; i--)
		if (drvr->iflist[i])
			brcmf_del_if(drvr, i);

	brcmf_bus_detach(drvr);

	if (drvr->prot)
		brcmf_proto_detach(drvr);

	brcmf_debugfs_detach(drvr);
	bus_if->drvr = NULL;
	kfree(drvr);
}

static int brcmf_get_pend_8021x_cnt(struct brcmf_if *ifp)
{
	return atomic_read(&ifp->pend_8021x_cnt);
}

int brcmf_netdev_wait_pend8021x(struct net_device *ndev)
{
	struct brcmf_if *ifp = netdev_priv(ndev);
	int err;

	err = wait_event_timeout(ifp->pend_8021x_wait,
				 !brcmf_get_pend_8021x_cnt(ifp),
				 msecs_to_jiffies(MAX_WAIT_FOR_8021X_TX));

	WARN_ON(!err);

	return !err;
}

/*
 * return chip id and rev of the device encoded in u32.
 */
u32 brcmf_get_chip_info(struct brcmf_if *ifp)
{
	struct brcmf_bus *bus = ifp->drvr->bus_if;

	return bus->chip << 4 | bus->chiprev;
}

static void brcmf_driver_init(struct work_struct *work)
{
	brcmf_debugfs_init();

#ifdef CONFIG_BRCMFMAC_SDIO
	brcmf_sdio_init();
#endif
#ifdef CONFIG_BRCMFMAC_USB
	brcmf_usb_init();
#endif
}
static DECLARE_WORK(brcmf_driver_work, brcmf_driver_init);

static int __init brcmfmac_module_init(void)
{
	if (!schedule_work(&brcmf_driver_work))
		return -EBUSY;

	return 0;
}

static void __exit brcmfmac_module_exit(void)
{
	cancel_work_sync(&brcmf_driver_work);

#ifdef CONFIG_BRCMFMAC_SDIO
	brcmf_sdio_exit();
#endif
#ifdef CONFIG_BRCMFMAC_USB
	brcmf_usb_exit();
#endif
	brcmf_debugfs_exit();
}

module_init(brcmfmac_module_init);
module_exit(brcmfmac_module_exit);