summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/ath/wil6210/main.c
blob: 78ba6e04c9445f35a3700d9bcd4a21ce1b42b557 (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
/*
 * Copyright (c) 2012-2016 Qualcomm Atheros, Inc.
 *
 * 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/moduleparam.h>
#include <linux/if_arp.h>
#include <linux/etherdevice.h>

#include "wil6210.h"
#include "txrx.h"
#include "wmi.h"
#include "boot_loader.h"

bool debug_fw; /* = false; */
module_param(debug_fw, bool, S_IRUGO);
MODULE_PARM_DESC(debug_fw, " do not perform card reset. For FW debug");

bool no_fw_recovery;
module_param(no_fw_recovery, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(no_fw_recovery, " disable automatic FW error recovery");

/* if not set via modparam, will be set to default value of 1/8 of
 * rx ring size during init flow
 */
unsigned short rx_ring_overflow_thrsh = WIL6210_RX_HIGH_TRSH_INIT;
module_param(rx_ring_overflow_thrsh, ushort, S_IRUGO);
MODULE_PARM_DESC(rx_ring_overflow_thrsh,
		 " RX ring overflow threshold in descriptors.");

/* We allow allocation of more than 1 page buffers to support large packets.
 * It is suboptimal behavior performance wise in case MTU above page size.
 */
unsigned int mtu_max = TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD;
static int mtu_max_set(const char *val, const struct kernel_param *kp)
{
	int ret;

	/* sets mtu_max directly. no need to restore it in case of
	 * illegal value since we assume this will fail insmod
	 */
	ret = param_set_uint(val, kp);
	if (ret)
		return ret;

	if (mtu_max < 68 || mtu_max > WIL_MAX_ETH_MTU)
		ret = -EINVAL;

	return ret;
}

static const struct kernel_param_ops mtu_max_ops = {
	.set = mtu_max_set,
	.get = param_get_uint,
};

module_param_cb(mtu_max, &mtu_max_ops, &mtu_max, S_IRUGO);
MODULE_PARM_DESC(mtu_max, " Max MTU value.");

static uint rx_ring_order = WIL_RX_RING_SIZE_ORDER_DEFAULT;
static uint tx_ring_order = WIL_TX_RING_SIZE_ORDER_DEFAULT;
static uint bcast_ring_order = WIL_BCAST_RING_SIZE_ORDER_DEFAULT;

static int ring_order_set(const char *val, const struct kernel_param *kp)
{
	int ret;
	uint x;

	ret = kstrtouint(val, 0, &x);
	if (ret)
		return ret;

	if ((x < WIL_RING_SIZE_ORDER_MIN) || (x > WIL_RING_SIZE_ORDER_MAX))
		return -EINVAL;

	*((uint *)kp->arg) = x;

	return 0;
}

static const struct kernel_param_ops ring_order_ops = {
	.set = ring_order_set,
	.get = param_get_uint,
};

module_param_cb(rx_ring_order, &ring_order_ops, &rx_ring_order, S_IRUGO);
MODULE_PARM_DESC(rx_ring_order, " Rx ring order; size = 1 << order");
module_param_cb(tx_ring_order, &ring_order_ops, &tx_ring_order, S_IRUGO);
MODULE_PARM_DESC(tx_ring_order, " Tx ring order; size = 1 << order");
module_param_cb(bcast_ring_order, &ring_order_ops, &bcast_ring_order, S_IRUGO);
MODULE_PARM_DESC(bcast_ring_order, " Bcast ring order; size = 1 << order");

#define RST_DELAY (20) /* msec, for loop in @wil_target_reset */
#define RST_COUNT (1 + 1000/RST_DELAY) /* round up to be above 1 sec total */

/*
 * Due to a hardware issue,
 * one has to read/write to/from NIC in 32-bit chunks;
 * regular memcpy_fromio and siblings will
 * not work on 64-bit platform - it uses 64-bit transactions
 *
 * Force 32-bit transactions to enable NIC on 64-bit platforms
 *
 * To avoid byte swap on big endian host, __raw_{read|write}l
 * should be used - {read|write}l would swap bytes to provide
 * little endian on PCI value in host endianness.
 */
void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
			  size_t count)
{
	u32 *d = dst;
	const volatile u32 __iomem *s = src;

	/* size_t is unsigned, if (count%4 != 0) it will wrap */
	for (count += 4; count > 4; count -= 4)
		*d++ = __raw_readl(s++);
}

void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
			size_t count)
{
	volatile u32 __iomem *d = dst;
	const u32 *s = src;

	for (count += 4; count > 4; count -= 4)
		__raw_writel(*s++, d++);
}

static void wil_disconnect_cid(struct wil6210_priv *wil, int cid,
			       u16 reason_code, bool from_event)
__acquires(&sta->tid_rx_lock) __releases(&sta->tid_rx_lock)
{
	uint i;
	struct net_device *ndev = wil_to_ndev(wil);
	struct wireless_dev *wdev = wil->wdev;
	struct wil_sta_info *sta = &wil->sta[cid];

	might_sleep();
	wil_dbg_misc(wil, "%s(CID %d, status %d)\n", __func__, cid,
		     sta->status);

	if (sta->status != wil_sta_unused) {
		if (!from_event)
			wmi_disconnect_sta(wil, sta->addr, reason_code, true);

		switch (wdev->iftype) {
		case NL80211_IFTYPE_AP:
		case NL80211_IFTYPE_P2P_GO:
			/* AP-like interface */
			cfg80211_del_sta(ndev, sta->addr, GFP_KERNEL);
			break;
		default:
			break;
		}
		sta->status = wil_sta_unused;
	}

	for (i = 0; i < WIL_STA_TID_NUM; i++) {
		struct wil_tid_ampdu_rx *r;

		spin_lock_bh(&sta->tid_rx_lock);

		r = sta->tid_rx[i];
		sta->tid_rx[i] = NULL;
		wil_tid_ampdu_rx_free(wil, r);

		spin_unlock_bh(&sta->tid_rx_lock);
	}
	for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
		if (wil->vring2cid_tid[i][0] == cid)
			wil_vring_fini_tx(wil, i);
	}
	memset(&sta->stats, 0, sizeof(sta->stats));
}

static void _wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
				u16 reason_code, bool from_event)
{
	int cid = -ENOENT;
	struct net_device *ndev = wil_to_ndev(wil);
	struct wireless_dev *wdev = wil->wdev;

	might_sleep();
	wil_info(wil, "%s(bssid=%pM, reason=%d, ev%s)\n", __func__, bssid,
		 reason_code, from_event ? "+" : "-");

	/* Cases are:
	 * - disconnect single STA, still connected
	 * - disconnect single STA, already disconnected
	 * - disconnect all
	 *
	 * For "disconnect all", there are 3 options:
	 * - bssid == NULL
	 * - bssid is broadcast address (ff:ff:ff:ff:ff:ff)
	 * - bssid is our MAC address
	 */
	if (bssid && !is_broadcast_ether_addr(bssid) &&
	    !ether_addr_equal_unaligned(ndev->dev_addr, bssid)) {
		cid = wil_find_cid(wil, bssid);
		wil_dbg_misc(wil, "Disconnect %pM, CID=%d, reason=%d\n",
			     bssid, cid, reason_code);
		if (cid >= 0) /* disconnect 1 peer */
			wil_disconnect_cid(wil, cid, reason_code, from_event);
	} else { /* all */
		wil_dbg_misc(wil, "Disconnect all\n");
		for (cid = 0; cid < WIL6210_MAX_CID; cid++)
			wil_disconnect_cid(wil, cid, reason_code, from_event);
	}

	/* link state */
	switch (wdev->iftype) {
	case NL80211_IFTYPE_STATION:
	case NL80211_IFTYPE_P2P_CLIENT:
		wil_bcast_fini(wil);
		netif_tx_stop_all_queues(ndev);
		netif_carrier_off(ndev);

		if (test_bit(wil_status_fwconnected, wil->status)) {
			clear_bit(wil_status_fwconnected, wil->status);
			cfg80211_disconnected(ndev, reason_code,
					      NULL, 0, false, GFP_KERNEL);
		} else if (test_bit(wil_status_fwconnecting, wil->status)) {
			cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
						WLAN_STATUS_UNSPECIFIED_FAILURE,
						GFP_KERNEL);
		}
		clear_bit(wil_status_fwconnecting, wil->status);
		break;
	default:
		break;
	}
}

static void wil_disconnect_worker(struct work_struct *work)
{
	struct wil6210_priv *wil = container_of(work,
			struct wil6210_priv, disconnect_worker);

	mutex_lock(&wil->mutex);
	_wil6210_disconnect(wil, NULL, WLAN_REASON_UNSPECIFIED, false);
	mutex_unlock(&wil->mutex);
}

static void wil_connect_timer_fn(ulong x)
{
	struct wil6210_priv *wil = (void *)x;
	bool q;

	wil_err(wil, "Connect timeout detected, disconnect station\n");

	/* reschedule to thread context - disconnect won't
	 * run from atomic context.
	 * queue on wmi_wq to prevent race with connect event.
	 */
	q = queue_work(wil->wmi_wq, &wil->disconnect_worker);
	wil_dbg_wmi(wil, "queue_work of disconnect_worker -> %d\n", q);
}

static void wil_scan_timer_fn(ulong x)
{
	struct wil6210_priv *wil = (void *)x;

	clear_bit(wil_status_fwready, wil->status);
	wil_err(wil, "Scan timeout detected, start fw error recovery\n");
	wil_fw_error_recovery(wil);
}

static int wil_wait_for_recovery(struct wil6210_priv *wil)
{
	if (wait_event_interruptible(wil->wq, wil->recovery_state !=
				     fw_recovery_pending)) {
		wil_err(wil, "Interrupt, canceling recovery\n");
		return -ERESTARTSYS;
	}
	if (wil->recovery_state != fw_recovery_running) {
		wil_info(wil, "Recovery cancelled\n");
		return -EINTR;
	}
	wil_info(wil, "Proceed with recovery\n");
	return 0;
}

void wil_set_recovery_state(struct wil6210_priv *wil, int state)
{
	wil_dbg_misc(wil, "%s(%d -> %d)\n", __func__,
		     wil->recovery_state, state);

	wil->recovery_state = state;
	wake_up_interruptible(&wil->wq);
}

static void wil_fw_error_worker(struct work_struct *work)
{
	struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
						fw_error_worker);
	struct wireless_dev *wdev = wil->wdev;

	wil_dbg_misc(wil, "fw error worker\n");

	if (!netif_running(wil_to_ndev(wil))) {
		wil_info(wil, "No recovery - interface is down\n");
		return;
	}

	/* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
	 * passed since last recovery attempt
	 */
	if (time_is_after_jiffies(wil->last_fw_recovery +
				  WIL6210_FW_RECOVERY_TO))
		wil->recovery_count++;
	else
		wil->recovery_count = 1; /* fw was alive for a long time */

	if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
		wil_err(wil, "too many recovery attempts (%d), giving up\n",
			wil->recovery_count);
		return;
	}

	wil->last_fw_recovery = jiffies;

	mutex_lock(&wil->mutex);
	switch (wdev->iftype) {
	case NL80211_IFTYPE_STATION:
	case NL80211_IFTYPE_P2P_CLIENT:
	case NL80211_IFTYPE_MONITOR:
		wil_info(wil, "fw error recovery requested (try %d)...\n",
			 wil->recovery_count);
		if (!no_fw_recovery)
			wil->recovery_state = fw_recovery_running;
		if (0 != wil_wait_for_recovery(wil))
			break;

		__wil_down(wil);
		__wil_up(wil);
		break;
	case NL80211_IFTYPE_AP:
	case NL80211_IFTYPE_P2P_GO:
		wil_info(wil, "No recovery for AP-like interface\n");
		/* recovery in these modes is done by upper layers */
		break;
	default:
		wil_err(wil, "No recovery - unknown interface type %d\n",
			wdev->iftype);
		break;
	}
	mutex_unlock(&wil->mutex);
}

static int wil_find_free_vring(struct wil6210_priv *wil)
{
	int i;

	for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
		if (!wil->vring_tx[i].va)
			return i;
	}
	return -EINVAL;
}

int wil_tx_init(struct wil6210_priv *wil, int cid)
{
	int rc = -EINVAL, ringid;

	if (cid < 0) {
		wil_err(wil, "No connection pending\n");
		goto out;
	}
	ringid = wil_find_free_vring(wil);
	if (ringid < 0) {
		wil_err(wil, "No free vring found\n");
		goto out;
	}

	wil_dbg_wmi(wil, "Configure for connection CID %d vring %d\n",
		    cid, ringid);

	rc = wil_vring_init_tx(wil, ringid, 1 << tx_ring_order, cid, 0);
	if (rc)
		wil_err(wil, "wil_vring_init_tx for CID %d vring %d failed\n",
			cid, ringid);

out:
	return rc;
}

int wil_bcast_init(struct wil6210_priv *wil)
{
	int ri = wil->bcast_vring, rc;

	if ((ri >= 0) && wil->vring_tx[ri].va)
		return 0;

	ri = wil_find_free_vring(wil);
	if (ri < 0)
		return ri;

	wil->bcast_vring = ri;
	rc = wil_vring_init_bcast(wil, ri, 1 << bcast_ring_order);
	if (rc)
		wil->bcast_vring = -1;

	return rc;
}

void wil_bcast_fini(struct wil6210_priv *wil)
{
	int ri = wil->bcast_vring;

	if (ri < 0)
		return;

	wil->bcast_vring = -1;
	wil_vring_fini_tx(wil, ri);
}

int wil_priv_init(struct wil6210_priv *wil)
{
	uint i;

	wil_dbg_misc(wil, "%s()\n", __func__);

	memset(wil->sta, 0, sizeof(wil->sta));
	for (i = 0; i < WIL6210_MAX_CID; i++)
		spin_lock_init(&wil->sta[i].tid_rx_lock);

	for (i = 0; i < WIL6210_MAX_TX_RINGS; i++)
		spin_lock_init(&wil->vring_tx_data[i].lock);

	mutex_init(&wil->mutex);
	mutex_init(&wil->wmi_mutex);
	mutex_init(&wil->back_rx_mutex);
	mutex_init(&wil->back_tx_mutex);
	mutex_init(&wil->probe_client_mutex);

	init_completion(&wil->wmi_ready);
	init_completion(&wil->wmi_call);

	wil->bcast_vring = -1;
	setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
	setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);

	INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
	INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
	INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
	INIT_WORK(&wil->back_rx_worker, wil_back_rx_worker);
	INIT_WORK(&wil->back_tx_worker, wil_back_tx_worker);
	INIT_WORK(&wil->probe_client_worker, wil_probe_client_worker);

	INIT_LIST_HEAD(&wil->pending_wmi_ev);
	INIT_LIST_HEAD(&wil->back_rx_pending);
	INIT_LIST_HEAD(&wil->back_tx_pending);
	INIT_LIST_HEAD(&wil->probe_client_pending);
	spin_lock_init(&wil->wmi_ev_lock);
	init_waitqueue_head(&wil->wq);

	wil->wmi_wq = create_singlethread_workqueue(WIL_NAME "_wmi");
	if (!wil->wmi_wq)
		return -EAGAIN;

	wil->wq_service = create_singlethread_workqueue(WIL_NAME "_service");
	if (!wil->wq_service)
		goto out_wmi_wq;

	wil->last_fw_recovery = jiffies;
	wil->tx_interframe_timeout = WIL6210_ITR_TX_INTERFRAME_TIMEOUT_DEFAULT;
	wil->rx_interframe_timeout = WIL6210_ITR_RX_INTERFRAME_TIMEOUT_DEFAULT;
	wil->tx_max_burst_duration = WIL6210_ITR_TX_MAX_BURST_DURATION_DEFAULT;
	wil->rx_max_burst_duration = WIL6210_ITR_RX_MAX_BURST_DURATION_DEFAULT;

	if (rx_ring_overflow_thrsh == WIL6210_RX_HIGH_TRSH_INIT)
		rx_ring_overflow_thrsh = WIL6210_RX_HIGH_TRSH_DEFAULT;
	return 0;

out_wmi_wq:
	destroy_workqueue(wil->wmi_wq);

	return -EAGAIN;
}

/**
 * wil6210_disconnect - disconnect one connection
 * @wil: driver context
 * @bssid: peer to disconnect, NULL to disconnect all
 * @reason_code: Reason code for the Disassociation frame
 * @from_event: whether is invoked from FW event handler
 *
 * Disconnect and release associated resources. If invoked not from the
 * FW event handler, issue WMI command(s) to trigger MAC disconnect.
 */
void wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid,
			u16 reason_code, bool from_event)
{
	wil_dbg_misc(wil, "%s()\n", __func__);

	del_timer_sync(&wil->connect_timer);
	_wil6210_disconnect(wil, bssid, reason_code, from_event);
}

void wil_priv_deinit(struct wil6210_priv *wil)
{
	wil_dbg_misc(wil, "%s()\n", __func__);

	wil_set_recovery_state(wil, fw_recovery_idle);
	del_timer_sync(&wil->scan_timer);
	cancel_work_sync(&wil->disconnect_worker);
	cancel_work_sync(&wil->fw_error_worker);
	mutex_lock(&wil->mutex);
	wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
	mutex_unlock(&wil->mutex);
	wmi_event_flush(wil);
	wil_back_rx_flush(wil);
	cancel_work_sync(&wil->back_rx_worker);
	wil_back_tx_flush(wil);
	cancel_work_sync(&wil->back_tx_worker);
	wil_probe_client_flush(wil);
	cancel_work_sync(&wil->probe_client_worker);
	destroy_workqueue(wil->wq_service);
	destroy_workqueue(wil->wmi_wq);
}

static inline void wil_halt_cpu(struct wil6210_priv *wil)
{
	wil_w(wil, RGF_USER_USER_CPU_0, BIT_USER_USER_CPU_MAN_RST);
	wil_w(wil, RGF_USER_MAC_CPU_0,  BIT_USER_MAC_CPU_MAN_RST);
}

static inline void wil_release_cpu(struct wil6210_priv *wil)
{
	/* Start CPU */
	wil_w(wil, RGF_USER_USER_CPU_0, 1);
}

static int wil_target_reset(struct wil6210_priv *wil)
{
	int delay = 0;
	u32 x, x1 = 0;

	wil_dbg_misc(wil, "Resetting \"%s\"...\n", wil->hw_name);

	/* Clear MAC link up */
	wil_s(wil, RGF_HP_CTRL, BIT(15));
	wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_HPAL_PERST_FROM_PAD);
	wil_s(wil, RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT_CAR_PERST_RST);

	wil_halt_cpu(wil);

	/* clear all boot loader "ready" bits */
	wil_w(wil, RGF_USER_BL +
	      offsetof(struct bl_dedicated_registers_v0, boot_loader_ready), 0);
	/* Clear Fw Download notification */
	wil_c(wil, RGF_USER_USAGE_6, BIT(0));

	wil_s(wil, RGF_CAF_OSC_CONTROL, BIT_CAF_OSC_XTAL_EN);
	/* XTAL stabilization should take about 3ms */
	usleep_range(5000, 7000);
	x = wil_r(wil, RGF_CAF_PLL_LOCK_STATUS);
	if (!(x & BIT_CAF_OSC_DIG_XTAL_STABLE)) {
		wil_err(wil, "Xtal stabilization timeout\n"
			"RGF_CAF_PLL_LOCK_STATUS = 0x%08x\n", x);
		return -ETIME;
	}
	/* switch 10k to XTAL*/
	wil_c(wil, RGF_USER_SPARROW_M_4, BIT_SPARROW_M_4_SEL_SLEEP_OR_REF);
	/* 40 MHz */
	wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_CAR_AHB_SW_SEL);

	wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x3ff81f);
	wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0xf);

	wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
	wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
	wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x000000f0);
	wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FE00);

	wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_0, 0x0);
	wil_w(wil, RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1, 0x0);

	wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
	wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
	wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
	wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);

	wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000003);
	/* reset A2 PCIE AHB */
	wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);

	wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);

	/* wait until device ready. typical time is 20..80 msec */
	do {
		msleep(RST_DELAY);
		x = wil_r(wil, RGF_USER_BL +
			  offsetof(struct bl_dedicated_registers_v0,
				   boot_loader_ready));
		if (x1 != x) {
			wil_dbg_misc(wil, "BL.ready 0x%08x => 0x%08x\n", x1, x);
			x1 = x;
		}
		if (delay++ > RST_COUNT) {
			wil_err(wil, "Reset not completed, bl.ready 0x%08x\n",
				x);
			return -ETIME;
		}
	} while (x != BL_READY);

	wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);

	/* enable fix for HW bug related to the SA/DA swap in AP Rx */
	wil_s(wil, RGF_DMA_OFUL_NID_0, BIT_DMA_OFUL_NID_0_RX_EXT_TR_EN |
	      BIT_DMA_OFUL_NID_0_RX_EXT_A3_SRC);

	wil_dbg_misc(wil, "Reset completed in %d ms\n", delay * RST_DELAY);
	return 0;
}

void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
{
	le32_to_cpus(&r->base);
	le16_to_cpus(&r->entry_size);
	le16_to_cpus(&r->size);
	le32_to_cpus(&r->tail);
	le32_to_cpus(&r->head);
}

static int wil_get_bl_info(struct wil6210_priv *wil)
{
	struct net_device *ndev = wil_to_ndev(wil);
	union {
		struct bl_dedicated_registers_v0 bl0;
		struct bl_dedicated_registers_v1 bl1;
	} bl;
	u32 bl_ver;
	u8 *mac;
	u16 rf_status;

	wil_memcpy_fromio_32(&bl, wil->csr + HOSTADDR(RGF_USER_BL),
			     sizeof(bl));
	bl_ver = le32_to_cpu(bl.bl0.boot_loader_struct_version);
	mac = bl.bl0.mac_address;

	if (bl_ver == 0) {
		le32_to_cpus(&bl.bl0.rf_type);
		le32_to_cpus(&bl.bl0.baseband_type);
		rf_status = 0; /* actually, unknown */
		wil_info(wil,
			 "Boot Loader struct v%d: MAC = %pM RF = 0x%08x bband = 0x%08x\n",
			 bl_ver, mac,
			 bl.bl0.rf_type, bl.bl0.baseband_type);
		wil_info(wil, "Boot Loader build unknown for struct v0\n");
	} else {
		le16_to_cpus(&bl.bl1.rf_type);
		rf_status = le16_to_cpu(bl.bl1.rf_status);
		le32_to_cpus(&bl.bl1.baseband_type);
		le16_to_cpus(&bl.bl1.bl_version_subminor);
		le16_to_cpus(&bl.bl1.bl_version_build);
		wil_info(wil,
			 "Boot Loader struct v%d: MAC = %pM RF = 0x%04x (status 0x%04x) bband = 0x%08x\n",
			 bl_ver, mac,
			 bl.bl1.rf_type, rf_status,
			 bl.bl1.baseband_type);
		wil_info(wil, "Boot Loader build %d.%d.%d.%d\n",
			 bl.bl1.bl_version_major, bl.bl1.bl_version_minor,
			 bl.bl1.bl_version_subminor, bl.bl1.bl_version_build);
	}

	if (!is_valid_ether_addr(mac)) {
		wil_err(wil, "BL: Invalid MAC %pM\n", mac);
		return -EINVAL;
	}

	ether_addr_copy(ndev->perm_addr, mac);
	if (!is_valid_ether_addr(ndev->dev_addr))
		ether_addr_copy(ndev->dev_addr, mac);

	if (rf_status) {/* bad RF cable? */
		wil_err(wil, "RF communication error 0x%04x",
			rf_status);
		return -EAGAIN;
	}

	return 0;
}

static void wil_bl_crash_info(struct wil6210_priv *wil, bool is_err)
{
	u32 bl_assert_code, bl_assert_blink, bl_magic_number;
	u32 bl_ver = wil_r(wil, RGF_USER_BL +
			   offsetof(struct bl_dedicated_registers_v0,
				    boot_loader_struct_version));

	if (bl_ver < 2)
		return;

	bl_assert_code = wil_r(wil, RGF_USER_BL +
			       offsetof(struct bl_dedicated_registers_v1,
					bl_assert_code));
	bl_assert_blink = wil_r(wil, RGF_USER_BL +
				offsetof(struct bl_dedicated_registers_v1,
					 bl_assert_blink));
	bl_magic_number = wil_r(wil, RGF_USER_BL +
				offsetof(struct bl_dedicated_registers_v1,
					 bl_magic_number));

	if (is_err) {
		wil_err(wil,
			"BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
			bl_assert_code, bl_assert_blink, bl_magic_number);
	} else {
		wil_dbg_misc(wil,
			     "BL assert code 0x%08x blink 0x%08x magic 0x%08x\n",
			     bl_assert_code, bl_assert_blink, bl_magic_number);
	}
}

static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
{
	ulong to = msecs_to_jiffies(1000);
	ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);

	if (0 == left) {
		wil_err(wil, "Firmware not ready\n");
		return -ETIME;
	} else {
		wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
			 jiffies_to_msecs(to-left), wil->hw_version);
	}
	return 0;
}

/*
 * We reset all the structures, and we reset the UMAC.
 * After calling this routine, you're expected to reload
 * the firmware.
 */
int wil_reset(struct wil6210_priv *wil, bool load_fw)
{
	int rc;

	wil_dbg_misc(wil, "%s()\n", __func__);

	WARN_ON(!mutex_is_locked(&wil->mutex));
	WARN_ON(test_bit(wil_status_napi_en, wil->status));

	if (debug_fw) {
		static const u8 mac[ETH_ALEN] = {
			0x00, 0xde, 0xad, 0x12, 0x34, 0x56,
		};
		struct net_device *ndev = wil_to_ndev(wil);

		ether_addr_copy(ndev->perm_addr, mac);
		ether_addr_copy(ndev->dev_addr, ndev->perm_addr);
		return 0;
	}

	if (wil->hw_version == HW_VER_UNKNOWN)
		return -ENODEV;

	set_bit(wil_status_resetting, wil->status);

	cancel_work_sync(&wil->disconnect_worker);
	wil6210_disconnect(wil, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
	wil_bcast_fini(wil);

	/* prevent NAPI from being scheduled and prevent wmi commands */
	mutex_lock(&wil->wmi_mutex);
	bitmap_zero(wil->status, wil_status_last);
	mutex_unlock(&wil->wmi_mutex);

	if (wil->scan_request) {
		wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
			     wil->scan_request);
		del_timer_sync(&wil->scan_timer);
		cfg80211_scan_done(wil->scan_request, true);
		wil->scan_request = NULL;
	}

	wil_mask_irq(wil);

	wmi_event_flush(wil);

	flush_workqueue(wil->wq_service);
	flush_workqueue(wil->wmi_wq);

	wil_bl_crash_info(wil, false);
	rc = wil_target_reset(wil);
	wil_rx_fini(wil);
	if (rc) {
		wil_bl_crash_info(wil, true);
		return rc;
	}

	rc = wil_get_bl_info(wil);
	if (rc == -EAGAIN && !load_fw) /* ignore RF error if not going up */
		rc = 0;
	if (rc)
		return rc;

	if (load_fw) {
		wil_info(wil, "Use firmware <%s> + board <%s>\n", WIL_FW_NAME,
			 WIL_FW2_NAME);

		wil_halt_cpu(wil);
		/* Loading f/w from the file */
		rc = wil_request_firmware(wil, WIL_FW_NAME);
		if (rc)
			return rc;
		rc = wil_request_firmware(wil, WIL_FW2_NAME);
		if (rc)
			return rc;

		/* Mark FW as loaded from host */
		wil_s(wil, RGF_USER_USAGE_6, 1);

		/* clear any interrupts which on-card-firmware
		 * may have set
		 */
		wil6210_clear_irq(wil);
		/* CAF_ICR - clear and mask */
		/* it is W1C, clear by writing back same value */
		wil_s(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, ICR), 0);
		wil_w(wil, RGF_CAF_ICR + offsetof(struct RGF_ICR, IMV), ~0);

		wil_release_cpu(wil);
	}

	/* init after reset */
	wil->ap_isolate = 0;
	reinit_completion(&wil->wmi_ready);
	reinit_completion(&wil->wmi_call);

	if (load_fw) {
		wil_configure_interrupt_moderation(wil);
		wil_unmask_irq(wil);

		/* we just started MAC, wait for FW ready */
		rc = wil_wait_for_fw_ready(wil);
		if (rc == 0) /* check FW is responsive */
			rc = wmi_echo(wil);
	}

	return rc;
}

void wil_fw_error_recovery(struct wil6210_priv *wil)
{
	wil_dbg_misc(wil, "starting fw error recovery\n");

	if (test_bit(wil_status_resetting, wil->status)) {
		wil_info(wil, "Reset already in progress\n");
		return;
	}

	wil->recovery_state = fw_recovery_pending;
	schedule_work(&wil->fw_error_worker);
}

int __wil_up(struct wil6210_priv *wil)
{
	struct net_device *ndev = wil_to_ndev(wil);
	struct wireless_dev *wdev = wil->wdev;
	int rc;

	WARN_ON(!mutex_is_locked(&wil->mutex));

	rc = wil_reset(wil, true);
	if (rc)
		return rc;

	/* Rx VRING. After MAC and beacon */
	rc = wil_rx_init(wil, 1 << rx_ring_order);
	if (rc)
		return rc;

	switch (wdev->iftype) {
	case NL80211_IFTYPE_STATION:
		wil_dbg_misc(wil, "type: STATION\n");
		ndev->type = ARPHRD_ETHER;
		break;
	case NL80211_IFTYPE_AP:
		wil_dbg_misc(wil, "type: AP\n");
		ndev->type = ARPHRD_ETHER;
		break;
	case NL80211_IFTYPE_P2P_CLIENT:
		wil_dbg_misc(wil, "type: P2P_CLIENT\n");
		ndev->type = ARPHRD_ETHER;
		break;
	case NL80211_IFTYPE_P2P_GO:
		wil_dbg_misc(wil, "type: P2P_GO\n");
		ndev->type = ARPHRD_ETHER;
		break;
	case NL80211_IFTYPE_MONITOR:
		wil_dbg_misc(wil, "type: Monitor\n");
		ndev->type = ARPHRD_IEEE80211_RADIOTAP;
		/* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
		break;
	default:
		return -EOPNOTSUPP;
	}

	/* MAC address - pre-requisite for other commands */
	wmi_set_mac_address(wil, ndev->dev_addr);

	wil_dbg_misc(wil, "NAPI enable\n");
	napi_enable(&wil->napi_rx);
	napi_enable(&wil->napi_tx);
	set_bit(wil_status_napi_en, wil->status);

	if (wil->platform_ops.bus_request)
		wil->platform_ops.bus_request(wil->platform_handle,
					      WIL_MAX_BUS_REQUEST_KBPS);

	return 0;
}

int wil_up(struct wil6210_priv *wil)
{
	int rc;

	wil_dbg_misc(wil, "%s()\n", __func__);

	mutex_lock(&wil->mutex);
	rc = __wil_up(wil);
	mutex_unlock(&wil->mutex);

	return rc;
}

int __wil_down(struct wil6210_priv *wil)
{
	int rc;

	WARN_ON(!mutex_is_locked(&wil->mutex));

	if (wil->platform_ops.bus_request)
		wil->platform_ops.bus_request(wil->platform_handle, 0);

	wil_disable_irq(wil);
	if (test_and_clear_bit(wil_status_napi_en, wil->status)) {
		napi_disable(&wil->napi_rx);
		napi_disable(&wil->napi_tx);
		wil_dbg_misc(wil, "NAPI disable\n");
	}
	wil_enable_irq(wil);

	if (wil->scan_request) {
		wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
			     wil->scan_request);
		del_timer_sync(&wil->scan_timer);
		cfg80211_scan_done(wil->scan_request, true);
		wil->scan_request = NULL;
	}

	if (test_bit(wil_status_fwconnected, wil->status) ||
	    test_bit(wil_status_fwconnecting, wil->status)) {

		mutex_unlock(&wil->mutex);
		rc = wmi_call(wil, WMI_DISCONNECT_CMDID, NULL, 0,
			      WMI_DISCONNECT_EVENTID, NULL, 0,
			      WIL6210_DISCONNECT_TO_MS);
		mutex_lock(&wil->mutex);
		if (rc)
			wil_err(wil, "timeout waiting for disconnect\n");
	}

	wil_reset(wil, false);

	return 0;
}

int wil_down(struct wil6210_priv *wil)
{
	int rc;

	wil_dbg_misc(wil, "%s()\n", __func__);

	wil_set_recovery_state(wil, fw_recovery_idle);
	mutex_lock(&wil->mutex);
	rc = __wil_down(wil);
	mutex_unlock(&wil->mutex);

	return rc;
}

int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
{
	int i;
	int rc = -ENOENT;

	for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
		if ((wil->sta[i].status != wil_sta_unused) &&
		    ether_addr_equal(wil->sta[i].addr, mac)) {
			rc = i;
			break;
		}
	}

	return rc;
}