summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
blob: 0199d7a5a64827c8d37e854c39f00b529bb2f797 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
/*
 * Copyright (C) 2005-2014, 2018-2021 Intel Corporation
 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
 * Copyright (C) 2016-2017 Intel Deutschland GmbH
 */
#ifndef __iwl_trans_h__
#define __iwl_trans_h__

#include <linux/ieee80211.h>
#include <linux/mm.h> /* for page_address */
#include <linux/lockdep.h>
#include <linux/kernel.h>

#include "iwl-debug.h"
#include "iwl-config.h"
#include "fw/img.h"
#include "iwl-op-mode.h"
#include <linux/firmware.h>
#include "fw/api/cmdhdr.h"
#include "fw/api/txq.h"
#include "fw/api/dbg-tlv.h"
#include "iwl-dbg-tlv.h"

/**
 * DOC: Transport layer - what is it ?
 *
 * The transport layer is the layer that deals with the HW directly. It provides
 * an abstraction of the underlying HW to the upper layer. The transport layer
 * doesn't provide any policy, algorithm or anything of this kind, but only
 * mechanisms to make the HW do something. It is not completely stateless but
 * close to it.
 * We will have an implementation for each different supported bus.
 */

/**
 * DOC: Life cycle of the transport layer
 *
 * The transport layer has a very precise life cycle.
 *
 *	1) A helper function is called during the module initialization and
 *	   registers the bus driver's ops with the transport's alloc function.
 *	2) Bus's probe calls to the transport layer's allocation functions.
 *	   Of course this function is bus specific.
 *	3) This allocation functions will spawn the upper layer which will
 *	   register mac80211.
 *
 *	4) At some point (i.e. mac80211's start call), the op_mode will call
 *	   the following sequence:
 *	   start_hw
 *	   start_fw
 *
 *	5) Then when finished (or reset):
 *	   stop_device
 *
 *	6) Eventually, the free function will be called.
 */

#define IWL_TRANS_FW_DBG_DOMAIN(trans)	IWL_FW_INI_DOMAIN_ALWAYS_ON

#define FH_RSCSR_FRAME_SIZE_MSK		0x00003FFF	/* bits 0-13 */
#define FH_RSCSR_FRAME_INVALID		0x55550000
#define FH_RSCSR_FRAME_ALIGN		0x40
#define FH_RSCSR_RPA_EN			BIT(25)
#define FH_RSCSR_RADA_EN		BIT(26)
#define FH_RSCSR_RXQ_POS		16
#define FH_RSCSR_RXQ_MASK		0x3F0000

struct iwl_rx_packet {
	/*
	 * The first 4 bytes of the RX frame header contain both the RX frame
	 * size and some flags.
	 * Bit fields:
	 * 31:    flag flush RB request
	 * 30:    flag ignore TC (terminal counter) request
	 * 29:    flag fast IRQ request
	 * 28-27: Reserved
	 * 26:    RADA enabled
	 * 25:    Offload enabled
	 * 24:    RPF enabled
	 * 23:    RSS enabled
	 * 22:    Checksum enabled
	 * 21-16: RX queue
	 * 15-14: Reserved
	 * 13-00: RX frame size
	 */
	__le32 len_n_flags;
	struct iwl_cmd_header hdr;
	u8 data[];
} __packed;

static inline u32 iwl_rx_packet_len(const struct iwl_rx_packet *pkt)
{
	return le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
}

static inline u32 iwl_rx_packet_payload_len(const struct iwl_rx_packet *pkt)
{
	return iwl_rx_packet_len(pkt) - sizeof(pkt->hdr);
}

/**
 * enum CMD_MODE - how to send the host commands ?
 *
 * @CMD_ASYNC: Return right away and don't wait for the response
 * @CMD_WANT_SKB: Not valid with CMD_ASYNC. The caller needs the buffer of
 *	the response. The caller needs to call iwl_free_resp when done.
 * @CMD_WANT_ASYNC_CALLBACK: the op_mode's async callback function must be
 *	called after this command completes. Valid only with CMD_ASYNC.
 * @CMD_SEND_IN_D3: Allow the command to be sent in D3 mode, relevant to
 *	SUSPEND and RESUME commands. We are in D3 mode when we set
 *	trans->system_pm_mode to IWL_PLAT_PM_MODE_D3.
 */
enum CMD_MODE {
	CMD_ASYNC		= BIT(0),
	CMD_WANT_SKB		= BIT(1),
	CMD_SEND_IN_RFKILL	= BIT(2),
	CMD_WANT_ASYNC_CALLBACK	= BIT(3),
	CMD_SEND_IN_D3          = BIT(4),
};

#define DEF_CMD_PAYLOAD_SIZE 320

/**
 * struct iwl_device_cmd
 *
 * For allocation of the command and tx queues, this establishes the overall
 * size of the largest command we send to uCode, except for commands that
 * aren't fully copied and use other TFD space.
 */
struct iwl_device_cmd {
	union {
		struct {
			struct iwl_cmd_header hdr;	/* uCode API */
			u8 payload[DEF_CMD_PAYLOAD_SIZE];
		};
		struct {
			struct iwl_cmd_header_wide hdr_wide;
			u8 payload_wide[DEF_CMD_PAYLOAD_SIZE -
					sizeof(struct iwl_cmd_header_wide) +
					sizeof(struct iwl_cmd_header)];
		};
	};
} __packed;

/**
 * struct iwl_device_tx_cmd - buffer for TX command
 * @hdr: the header
 * @payload: the payload placeholder
 *
 * The actual structure is sized dynamically according to need.
 */
struct iwl_device_tx_cmd {
	struct iwl_cmd_header hdr;
	u8 payload[];
} __packed;

#define TFD_MAX_PAYLOAD_SIZE (sizeof(struct iwl_device_cmd))

/*
 * number of transfer buffers (fragments) per transmit frame descriptor;
 * this is just the driver's idea, the hardware supports 20
 */
#define IWL_MAX_CMD_TBS_PER_TFD	2

/* We need 2 entries for the TX command and header, and another one might
 * be needed for potential data in the SKB's head. The remaining ones can
 * be used for frags.
 */
#define IWL_TRANS_MAX_FRAGS(trans) ((trans)->txqs.tfd.max_tbs - 3)

/**
 * enum iwl_hcmd_dataflag - flag for each one of the chunks of the command
 *
 * @IWL_HCMD_DFL_NOCOPY: By default, the command is copied to the host command's
 *	ring. The transport layer doesn't map the command's buffer to DMA, but
 *	rather copies it to a previously allocated DMA buffer. This flag tells
 *	the transport layer not to copy the command, but to map the existing
 *	buffer (that is passed in) instead. This saves the memcpy and allows
 *	commands that are bigger than the fixed buffer to be submitted.
 *	Note that a TFD entry after a NOCOPY one cannot be a normal copied one.
 * @IWL_HCMD_DFL_DUP: Only valid without NOCOPY, duplicate the memory for this
 *	chunk internally and free it again after the command completes. This
 *	can (currently) be used only once per command.
 *	Note that a TFD entry after a DUP one cannot be a normal copied one.
 */
enum iwl_hcmd_dataflag {
	IWL_HCMD_DFL_NOCOPY	= BIT(0),
	IWL_HCMD_DFL_DUP	= BIT(1),
};

enum iwl_error_event_table_status {
	IWL_ERROR_EVENT_TABLE_LMAC1 = BIT(0),
	IWL_ERROR_EVENT_TABLE_LMAC2 = BIT(1),
	IWL_ERROR_EVENT_TABLE_UMAC = BIT(2),
	IWL_ERROR_EVENT_TABLE_TCM = BIT(3),
};

/**
 * struct iwl_host_cmd - Host command to the uCode
 *
 * @data: array of chunks that composes the data of the host command
 * @resp_pkt: response packet, if %CMD_WANT_SKB was set
 * @_rx_page_order: (internally used to free response packet)
 * @_rx_page_addr: (internally used to free response packet)
 * @flags: can be CMD_*
 * @len: array of the lengths of the chunks in data
 * @dataflags: IWL_HCMD_DFL_*
 * @id: command id of the host command, for wide commands encoding the
 *	version and group as well
 */
struct iwl_host_cmd {
	const void *data[IWL_MAX_CMD_TBS_PER_TFD];
	struct iwl_rx_packet *resp_pkt;
	unsigned long _rx_page_addr;
	u32 _rx_page_order;

	u32 flags;
	u32 id;
	u16 len[IWL_MAX_CMD_TBS_PER_TFD];
	u8 dataflags[IWL_MAX_CMD_TBS_PER_TFD];
};

static inline void iwl_free_resp(struct iwl_host_cmd *cmd)
{
	free_pages(cmd->_rx_page_addr, cmd->_rx_page_order);
}

struct iwl_rx_cmd_buffer {
	struct page *_page;
	int _offset;
	bool _page_stolen;
	u32 _rx_page_order;
	unsigned int truesize;
};

static inline void *rxb_addr(struct iwl_rx_cmd_buffer *r)
{
	return (void *)((unsigned long)page_address(r->_page) + r->_offset);
}

static inline int rxb_offset(struct iwl_rx_cmd_buffer *r)
{
	return r->_offset;
}

static inline struct page *rxb_steal_page(struct iwl_rx_cmd_buffer *r)
{
	r->_page_stolen = true;
	get_page(r->_page);
	return r->_page;
}

static inline void iwl_free_rxb(struct iwl_rx_cmd_buffer *r)
{
	__free_pages(r->_page, r->_rx_page_order);
}

#define MAX_NO_RECLAIM_CMDS	6

#define IWL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo))))

/*
 * Maximum number of HW queues the transport layer
 * currently supports
 */
#define IWL_MAX_HW_QUEUES		32
#define IWL_MAX_TVQM_QUEUES		512

#define IWL_MAX_TID_COUNT	8
#define IWL_MGMT_TID		15
#define IWL_FRAME_LIMIT	64
#define IWL_MAX_RX_HW_QUEUES	16
#define IWL_9000_MAX_RX_HW_QUEUES	6

/**
 * enum iwl_wowlan_status - WoWLAN image/device status
 * @IWL_D3_STATUS_ALIVE: firmware is still running after resume
 * @IWL_D3_STATUS_RESET: device was reset while suspended
 */
enum iwl_d3_status {
	IWL_D3_STATUS_ALIVE,
	IWL_D3_STATUS_RESET,
};

/**
 * enum iwl_trans_status: transport status flags
 * @STATUS_SYNC_HCMD_ACTIVE: a SYNC command is being processed
 * @STATUS_DEVICE_ENABLED: APM is enabled
 * @STATUS_TPOWER_PMI: the device might be asleep (need to wake it up)
 * @STATUS_INT_ENABLED: interrupts are enabled
 * @STATUS_RFKILL_HW: the actual HW state of the RF-kill switch
 * @STATUS_RFKILL_OPMODE: RF-kill state reported to opmode
 * @STATUS_FW_ERROR: the fw is in error state
 * @STATUS_TRANS_GOING_IDLE: shutting down the trans, only special commands
 *	are sent
 * @STATUS_TRANS_IDLE: the trans is idle - general commands are not to be sent
 * @STATUS_TRANS_DEAD: trans is dead - avoid any read/write operation
 */
enum iwl_trans_status {
	STATUS_SYNC_HCMD_ACTIVE,
	STATUS_DEVICE_ENABLED,
	STATUS_TPOWER_PMI,
	STATUS_INT_ENABLED,
	STATUS_RFKILL_HW,
	STATUS_RFKILL_OPMODE,
	STATUS_FW_ERROR,
	STATUS_TRANS_GOING_IDLE,
	STATUS_TRANS_IDLE,
	STATUS_TRANS_DEAD,
};

static inline int
iwl_trans_get_rb_size_order(enum iwl_amsdu_size rb_size)
{
	switch (rb_size) {
	case IWL_AMSDU_2K:
		return get_order(2 * 1024);
	case IWL_AMSDU_4K:
		return get_order(4 * 1024);
	case IWL_AMSDU_8K:
		return get_order(8 * 1024);
	case IWL_AMSDU_12K:
		return get_order(16 * 1024);
	default:
		WARN_ON(1);
		return -1;
	}
}

static inline int
iwl_trans_get_rb_size(enum iwl_amsdu_size rb_size)
{
	switch (rb_size) {
	case IWL_AMSDU_2K:
		return 2 * 1024;
	case IWL_AMSDU_4K:
		return 4 * 1024;
	case IWL_AMSDU_8K:
		return 8 * 1024;
	case IWL_AMSDU_12K:
		return 16 * 1024;
	default:
		WARN_ON(1);
		return 0;
	}
}

struct iwl_hcmd_names {
	u8 cmd_id;
	const char *const cmd_name;
};

#define HCMD_NAME(x)	\
	{ .cmd_id = x, .cmd_name = #x }

struct iwl_hcmd_arr {
	const struct iwl_hcmd_names *arr;
	int size;
};

#define HCMD_ARR(x)	\
	{ .arr = x, .size = ARRAY_SIZE(x) }

/**
 * struct iwl_trans_config - transport configuration
 *
 * @op_mode: pointer to the upper layer.
 * @cmd_queue: the index of the command queue.
 *	Must be set before start_fw.
 * @cmd_fifo: the fifo for host commands
 * @cmd_q_wdg_timeout: the timeout of the watchdog timer for the command queue.
 * @no_reclaim_cmds: Some devices erroneously don't set the
 *	SEQ_RX_FRAME bit on some notifications, this is the
 *	list of such notifications to filter. Max length is
 *	%MAX_NO_RECLAIM_CMDS.
 * @n_no_reclaim_cmds: # of commands in list
 * @rx_buf_size: RX buffer size needed for A-MSDUs
 *	if unset 4k will be the RX buffer size
 * @bc_table_dword: set to true if the BC table expects the byte count to be
 *	in DWORD (as opposed to bytes)
 * @scd_set_active: should the transport configure the SCD for HCMD queue
 * @command_groups: array of command groups, each member is an array of the
 *	commands in the group; for debugging only
 * @command_groups_size: number of command groups, to avoid illegal access
 * @cb_data_offs: offset inside skb->cb to store transport data at, must have
 *	space for at least two pointers
 * @fw_reset_handshake: firmware supports reset flow handshake
 */
struct iwl_trans_config {
	struct iwl_op_mode *op_mode;

	u8 cmd_queue;
	u8 cmd_fifo;
	unsigned int cmd_q_wdg_timeout;
	const u8 *no_reclaim_cmds;
	unsigned int n_no_reclaim_cmds;

	enum iwl_amsdu_size rx_buf_size;
	bool bc_table_dword;
	bool scd_set_active;
	const struct iwl_hcmd_arr *command_groups;
	int command_groups_size;

	u8 cb_data_offs;
	bool fw_reset_handshake;
};

struct iwl_trans_dump_data {
	u32 len;
	u8 data[];
};

struct iwl_trans;

struct iwl_trans_txq_scd_cfg {
	u8 fifo;
	u8 sta_id;
	u8 tid;
	bool aggregate;
	int frame_limit;
};

/**
 * struct iwl_trans_rxq_dma_data - RX queue DMA data
 * @fr_bd_cb: DMA address of free BD cyclic buffer
 * @fr_bd_wid: Initial write index of the free BD cyclic buffer
 * @urbd_stts_wrptr: DMA address of urbd_stts_wrptr
 * @ur_bd_cb: DMA address of used BD cyclic buffer
 */
struct iwl_trans_rxq_dma_data {
	u64 fr_bd_cb;
	u32 fr_bd_wid;
	u64 urbd_stts_wrptr;
	u64 ur_bd_cb;
};

/**
 * struct iwl_trans_ops - transport specific operations
 *
 * All the handlers MUST be implemented
 *
 * @start_hw: starts the HW. From that point on, the HW can send interrupts.
 *	May sleep.
 * @op_mode_leave: Turn off the HW RF kill indication if on
 *	May sleep
 * @start_fw: allocates and inits all the resources for the transport
 *	layer. Also kick a fw image.
 *	May sleep
 * @fw_alive: called when the fw sends alive notification. If the fw provides
 *	the SCD base address in SRAM, then provide it here, or 0 otherwise.
 *	May sleep
 * @stop_device: stops the whole device (embedded CPU put to reset) and stops
 *	the HW. From that point on, the HW will be stopped but will still issue
 *	an interrupt if the HW RF kill switch is triggered.
 *	This callback must do the right thing and not crash even if %start_hw()
 *	was called but not &start_fw(). May sleep.
 * @d3_suspend: put the device into the correct mode for WoWLAN during
 *	suspend. This is optional, if not implemented WoWLAN will not be
 *	supported. This callback may sleep.
 * @d3_resume: resume the device after WoWLAN, enabling the opmode to
 *	talk to the WoWLAN image to get its status. This is optional, if not
 *	implemented WoWLAN will not be supported. This callback may sleep.
 * @send_cmd:send a host command. Must return -ERFKILL if RFkill is asserted.
 *	If RFkill is asserted in the middle of a SYNC host command, it must
 *	return -ERFKILL straight away.
 *	May sleep only if CMD_ASYNC is not set
 * @tx: send an skb. The transport relies on the op_mode to zero the
 *	the ieee80211_tx_info->driver_data. If the MPDU is an A-MSDU, all
 *	the CSUM will be taken care of (TCP CSUM and IP header in case of
 *	IPv4). If the MPDU is a single MSDU, the op_mode must compute the IP
 *	header if it is IPv4.
 *	Must be atomic
 * @reclaim: free packet until ssn. Returns a list of freed packets.
 *	Must be atomic
 * @txq_enable: setup a queue. To setup an AC queue, use the
 *	iwl_trans_ac_txq_enable wrapper. fw_alive must have been called before
 *	this one. The op_mode must not configure the HCMD queue. The scheduler
 *	configuration may be %NULL, in which case the hardware will not be
 *	configured. If true is returned, the operation mode needs to increment
 *	the sequence number of the packets routed to this queue because of a
 *	hardware scheduler bug. May sleep.
 * @txq_disable: de-configure a Tx queue to send AMPDUs
 *	Must be atomic
 * @txq_set_shared_mode: change Tx queue shared/unshared marking
 * @wait_tx_queues_empty: wait until tx queues are empty. May sleep.
 * @wait_txq_empty: wait until specific tx queue is empty. May sleep.
 * @freeze_txq_timer: prevents the timer of the queue from firing until the
 *	queue is set to awake. Must be atomic.
 * @block_txq_ptrs: stop updating the write pointers of the Tx queues. Note
 *	that the transport needs to refcount the calls since this function
 *	will be called several times with block = true, and then the queues
 *	need to be unblocked only after the same number of calls with
 *	block = false.
 * @write8: write a u8 to a register at offset ofs from the BAR
 * @write32: write a u32 to a register at offset ofs from the BAR
 * @read32: read a u32 register at offset ofs from the BAR
 * @read_prph: read a DWORD from a periphery register
 * @write_prph: write a DWORD to a periphery register
 * @read_mem: read device's SRAM in DWORD
 * @write_mem: write device's SRAM in DWORD. If %buf is %NULL, then the memory
 *	will be zeroed.
 * @read_config32: read a u32 value from the device's config space at
 *	the given offset.
 * @configure: configure parameters required by the transport layer from
 *	the op_mode. May be called several times before start_fw, can't be
 *	called after that.
 * @set_pmi: set the power pmi state
 * @grab_nic_access: wake the NIC to be able to access non-HBUS regs.
 *	Sleeping is not allowed between grab_nic_access and
 *	release_nic_access.
 * @release_nic_access: let the NIC go to sleep. The "flags" parameter
 *	must be the same one that was sent before to the grab_nic_access.
 * @set_bits_mask - set SRAM register according to value and mask.
 * @dump_data: return a vmalloc'ed buffer with debug data, maybe containing last
 *	TX'ed commands and similar. The buffer will be vfree'd by the caller.
 *	Note that the transport must fill in the proper file headers.
 * @debugfs_cleanup: used in the driver unload flow to make a proper cleanup
 *	of the trans debugfs
 * @set_pnvm: set the pnvm data in the prph scratch buffer, inside the
 *	context info.
 * @interrupts: disable/enable interrupts to transport
 */
struct iwl_trans_ops {

	int (*start_hw)(struct iwl_trans *iwl_trans);
	void (*op_mode_leave)(struct iwl_trans *iwl_trans);
	int (*start_fw)(struct iwl_trans *trans, const struct fw_img *fw,
			bool run_in_rfkill);
	void (*fw_alive)(struct iwl_trans *trans, u32 scd_addr);
	void (*stop_device)(struct iwl_trans *trans);

	int (*d3_suspend)(struct iwl_trans *trans, bool test, bool reset);
	int (*d3_resume)(struct iwl_trans *trans, enum iwl_d3_status *status,
			 bool test, bool reset);

	int (*send_cmd)(struct iwl_trans *trans, struct iwl_host_cmd *cmd);

	int (*tx)(struct iwl_trans *trans, struct sk_buff *skb,
		  struct iwl_device_tx_cmd *dev_cmd, int queue);
	void (*reclaim)(struct iwl_trans *trans, int queue, int ssn,
			struct sk_buff_head *skbs);

	void (*set_q_ptrs)(struct iwl_trans *trans, int queue, int ptr);

	bool (*txq_enable)(struct iwl_trans *trans, int queue, u16 ssn,
			   const struct iwl_trans_txq_scd_cfg *cfg,
			   unsigned int queue_wdg_timeout);
	void (*txq_disable)(struct iwl_trans *trans, int queue,
			    bool configure_scd);
	/* 22000 functions */
	int (*txq_alloc)(struct iwl_trans *trans,
			 __le16 flags, u8 sta_id, u8 tid,
			 int cmd_id, int size,
			 unsigned int queue_wdg_timeout);
	void (*txq_free)(struct iwl_trans *trans, int queue);
	int (*rxq_dma_data)(struct iwl_trans *trans, int queue,
			    struct iwl_trans_rxq_dma_data *data);

	void (*txq_set_shared_mode)(struct iwl_trans *trans, u32 txq_id,
				    bool shared);

	int (*wait_tx_queues_empty)(struct iwl_trans *trans, u32 txq_bm);
	int (*wait_txq_empty)(struct iwl_trans *trans, int queue);
	void (*freeze_txq_timer)(struct iwl_trans *trans, unsigned long txqs,
				 bool freeze);
	void (*block_txq_ptrs)(struct iwl_trans *trans, bool block);

	void (*write8)(struct iwl_trans *trans, u32 ofs, u8 val);
	void (*write32)(struct iwl_trans *trans, u32 ofs, u32 val);
	u32 (*read32)(struct iwl_trans *trans, u32 ofs);
	u32 (*read_prph)(struct iwl_trans *trans, u32 ofs);
	void (*write_prph)(struct iwl_trans *trans, u32 ofs, u32 val);
	int (*read_mem)(struct iwl_trans *trans, u32 addr,
			void *buf, int dwords);
	int (*write_mem)(struct iwl_trans *trans, u32 addr,
			 const void *buf, int dwords);
	int (*read_config32)(struct iwl_trans *trans, u32 ofs, u32 *val);
	void (*configure)(struct iwl_trans *trans,
			  const struct iwl_trans_config *trans_cfg);
	void (*set_pmi)(struct iwl_trans *trans, bool state);
	void (*sw_reset)(struct iwl_trans *trans);
	bool (*grab_nic_access)(struct iwl_trans *trans);
	void (*release_nic_access)(struct iwl_trans *trans);
	void (*set_bits_mask)(struct iwl_trans *trans, u32 reg, u32 mask,
			      u32 value);

	struct iwl_trans_dump_data *(*dump_data)(struct iwl_trans *trans,
						 u32 dump_mask);
	void (*debugfs_cleanup)(struct iwl_trans *trans);
	void (*sync_nmi)(struct iwl_trans *trans);
	int (*set_pnvm)(struct iwl_trans *trans, const void *data, u32 len);
	int (*set_reduce_power)(struct iwl_trans *trans,
				const void *data, u32 len);
	void (*interrupts)(struct iwl_trans *trans, bool enable);
};

/**
 * enum iwl_trans_state - state of the transport layer
 *
 * @IWL_TRANS_NO_FW: firmware wasn't started yet, or crashed
 * @IWL_TRANS_FW_STARTED: FW was started, but not alive yet
 * @IWL_TRANS_FW_ALIVE: FW has sent an alive response
 */
enum iwl_trans_state {
	IWL_TRANS_NO_FW,
	IWL_TRANS_FW_STARTED,
	IWL_TRANS_FW_ALIVE,
};

/**
 * DOC: Platform power management
 *
 * In system-wide power management the entire platform goes into a low
 * power state (e.g. idle or suspend to RAM) at the same time and the
 * device is configured as a wakeup source for the entire platform.
 * This is usually triggered by userspace activity (e.g. the user
 * presses the suspend button or a power management daemon decides to
 * put the platform in low power mode).  The device's behavior in this
 * mode is dictated by the wake-on-WLAN configuration.
 *
 * The terms used for the device's behavior are as follows:
 *
 *	- D0: the device is fully powered and the host is awake;
 *	- D3: the device is in low power mode and only reacts to
 *		specific events (e.g. magic-packet received or scan
 *		results found);
 *
 * These terms reflect the power modes in the firmware and are not to
 * be confused with the physical device power state.
 */

/**
 * enum iwl_plat_pm_mode - platform power management mode
 *
 * This enumeration describes the device's platform power management
 * behavior when in system-wide suspend (i.e WoWLAN).
 *
 * @IWL_PLAT_PM_MODE_DISABLED: power management is disabled for this
 *	device.  In system-wide suspend mode, it means that the all
 *	connections will be closed automatically by mac80211 before
 *	the platform is suspended.
 * @IWL_PLAT_PM_MODE_D3: the device goes into D3 mode (i.e. WoWLAN).
 */
enum iwl_plat_pm_mode {
	IWL_PLAT_PM_MODE_DISABLED,
	IWL_PLAT_PM_MODE_D3,
};

/**
 * enum iwl_ini_cfg_state
 * @IWL_INI_CFG_STATE_NOT_LOADED: no debug cfg was given
 * @IWL_INI_CFG_STATE_LOADED: debug cfg was found and loaded
 * @IWL_INI_CFG_STATE_CORRUPTED: debug cfg was found and some of the TLVs
 *	are corrupted. The rest of the debug TLVs will still be used
 */
enum iwl_ini_cfg_state {
	IWL_INI_CFG_STATE_NOT_LOADED,
	IWL_INI_CFG_STATE_LOADED,
	IWL_INI_CFG_STATE_CORRUPTED,
};

/* Max time to wait for nmi interrupt */
#define IWL_TRANS_NMI_TIMEOUT (HZ / 4)

/**
 * struct iwl_dram_data
 * @physical: page phy pointer
 * @block: pointer to the allocated block/page
 * @size: size of the block/page
 */
struct iwl_dram_data {
	dma_addr_t physical;
	void *block;
	int size;
};

/**
 * struct iwl_fw_mon - fw monitor per allocation id
 * @num_frags: number of fragments
 * @frags: an array of DRAM buffer fragments
 */
struct iwl_fw_mon {
	u32 num_frags;
	struct iwl_dram_data *frags;
};

/**
 * struct iwl_self_init_dram - dram data used by self init process
 * @fw: lmac and umac dram data
 * @fw_cnt: total number of items in array
 * @paging: paging dram data
 * @paging_cnt: total number of items in array
 */
struct iwl_self_init_dram {
	struct iwl_dram_data *fw;
	int fw_cnt;
	struct iwl_dram_data *paging;
	int paging_cnt;
};

/**
 * struct iwl_trans_debug - transport debug related data
 *
 * @n_dest_reg: num of reg_ops in %dbg_dest_tlv
 * @rec_on: true iff there is a fw debug recording currently active
 * @dest_tlv: points to the destination TLV for debug
 * @conf_tlv: array of pointers to configuration TLVs for debug
 * @trigger_tlv: array of pointers to triggers TLVs for debug
 * @lmac_error_event_table: addrs of lmacs error tables
 * @umac_error_event_table: addr of umac error table
 * @tcm_error_event_table: address of TCM error table
 * @error_event_table_tlv_status: bitmap that indicates what error table
 *	pointers was recevied via TLV. uses enum &iwl_error_event_table_status
 * @internal_ini_cfg: internal debug cfg state. Uses &enum iwl_ini_cfg_state
 * @external_ini_cfg: external debug cfg state. Uses &enum iwl_ini_cfg_state
 * @fw_mon_cfg: debug buffer allocation configuration
 * @fw_mon_ini: DRAM buffer fragments per allocation id
 * @fw_mon: DRAM buffer for firmware monitor
 * @hw_error: equals true if hw error interrupt was received from the FW
 * @ini_dest: debug monitor destination uses &enum iwl_fw_ini_buffer_location
 * @active_regions: active regions
 * @debug_info_tlv_list: list of debug info TLVs
 * @time_point: array of debug time points
 * @periodic_trig_list: periodic triggers list
 * @domains_bitmap: bitmap of active domains other than
 *	&IWL_FW_INI_DOMAIN_ALWAYS_ON
 */
struct iwl_trans_debug {
	u8 n_dest_reg;
	bool rec_on;

	const struct iwl_fw_dbg_dest_tlv_v1 *dest_tlv;
	const struct iwl_fw_dbg_conf_tlv *conf_tlv[FW_DBG_CONF_MAX];
	struct iwl_fw_dbg_trigger_tlv * const *trigger_tlv;

	u32 lmac_error_event_table[2];
	u32 umac_error_event_table;
	u32 tcm_error_event_table;
	unsigned int error_event_table_tlv_status;

	enum iwl_ini_cfg_state internal_ini_cfg;
	enum iwl_ini_cfg_state external_ini_cfg;

	struct iwl_fw_ini_allocation_tlv fw_mon_cfg[IWL_FW_INI_ALLOCATION_NUM];
	struct iwl_fw_mon fw_mon_ini[IWL_FW_INI_ALLOCATION_NUM];

	struct iwl_dram_data fw_mon;

	bool hw_error;
	enum iwl_fw_ini_buffer_location ini_dest;

	u64 unsupported_region_msk;
	struct iwl_ucode_tlv *active_regions[IWL_FW_INI_MAX_REGION_ID];
	struct list_head debug_info_tlv_list;
	struct iwl_dbg_tlv_time_point_data
		time_point[IWL_FW_INI_TIME_POINT_NUM];
	struct list_head periodic_trig_list;

	u32 domains_bitmap;
};

struct iwl_dma_ptr {
	dma_addr_t dma;
	void *addr;
	size_t size;
};

struct iwl_cmd_meta {
	/* only for SYNC commands, iff the reply skb is wanted */
	struct iwl_host_cmd *source;
	u32 flags;
	u32 tbs;
};

/*
 * The FH will write back to the first TB only, so we need to copy some data
 * into the buffer regardless of whether it should be mapped or not.
 * This indicates how big the first TB must be to include the scratch buffer
 * and the assigned PN.
 * Since PN location is 8 bytes at offset 12, it's 20 now.
 * If we make it bigger then allocations will be bigger and copy slower, so
 * that's probably not useful.
 */
#define IWL_FIRST_TB_SIZE	20
#define IWL_FIRST_TB_SIZE_ALIGN ALIGN(IWL_FIRST_TB_SIZE, 64)

struct iwl_pcie_txq_entry {
	void *cmd;
	struct sk_buff *skb;
	/* buffer to free after command completes */
	const void *free_buf;
	struct iwl_cmd_meta meta;
};

struct iwl_pcie_first_tb_buf {
	u8 buf[IWL_FIRST_TB_SIZE_ALIGN];
};

/**
 * struct iwl_txq - Tx Queue for DMA
 * @q: generic Rx/Tx queue descriptor
 * @tfds: transmit frame descriptors (DMA memory)
 * @first_tb_bufs: start of command headers, including scratch buffers, for
 *	the writeback -- this is DMA memory and an array holding one buffer
 *	for each command on the queue
 * @first_tb_dma: DMA address for the first_tb_bufs start
 * @entries: transmit entries (driver state)
 * @lock: queue lock
 * @stuck_timer: timer that fires if queue gets stuck
 * @trans: pointer back to transport (for timer)
 * @need_update: indicates need to update read/write index
 * @ampdu: true if this queue is an ampdu queue for an specific RA/TID
 * @wd_timeout: queue watchdog timeout (jiffies) - per queue
 * @frozen: tx stuck queue timer is frozen
 * @frozen_expiry_remainder: remember how long until the timer fires
 * @bc_tbl: byte count table of the queue (relevant only for gen2 transport)
 * @write_ptr: 1-st empty entry (index) host_w
 * @read_ptr: last used entry (index) host_r
 * @dma_addr:  physical addr for BD's
 * @n_window: safe queue window
 * @id: queue id
 * @low_mark: low watermark, resume queue if free space more than this
 * @high_mark: high watermark, stop queue if free space less than this
 *
 * A Tx queue consists of circular buffer of BDs (a.k.a. TFDs, transmit frame
 * descriptors) and required locking structures.
 *
 * Note the difference between TFD_QUEUE_SIZE_MAX and n_window: the hardware
 * always assumes 256 descriptors, so TFD_QUEUE_SIZE_MAX is always 256 (unless
 * there might be HW changes in the future). For the normal TX
 * queues, n_window, which is the size of the software queue data
 * is also 256; however, for the command queue, n_window is only
 * 32 since we don't need so many commands pending. Since the HW
 * still uses 256 BDs for DMA though, TFD_QUEUE_SIZE_MAX stays 256.
 * This means that we end up with the following:
 *  HW entries: | 0 | ... | N * 32 | ... | N * 32 + 31 | ... | 255 |
 *  SW entries:           | 0      | ... | 31          |
 * where N is a number between 0 and 7. This means that the SW
 * data is a window overlayed over the HW queue.
 */
struct iwl_txq {
	void *tfds;
	struct iwl_pcie_first_tb_buf *first_tb_bufs;
	dma_addr_t first_tb_dma;
	struct iwl_pcie_txq_entry *entries;
	/* lock for syncing changes on the queue */
	spinlock_t lock;
	unsigned long frozen_expiry_remainder;
	struct timer_list stuck_timer;
	struct iwl_trans *trans;
	bool need_update;
	bool frozen;
	bool ampdu;
	int block;
	unsigned long wd_timeout;
	struct sk_buff_head overflow_q;
	struct iwl_dma_ptr bc_tbl;

	int write_ptr;
	int read_ptr;
	dma_addr_t dma_addr;
	int n_window;
	u32 id;
	int low_mark;
	int high_mark;

	bool overflow_tx;
};

/**
 * struct iwl_trans_txqs - transport tx queues data
 *
 * @bc_table_dword: true if the BC table expects DWORD (as opposed to bytes)
 * @page_offs: offset from skb->cb to mac header page pointer
 * @dev_cmd_offs: offset from skb->cb to iwl_device_tx_cmd pointer
 * @queue_used - bit mask of used queues
 * @queue_stopped - bit mask of stopped queues
 * @scd_bc_tbls: gen1 pointer to the byte count table of the scheduler
 */
struct iwl_trans_txqs {
	unsigned long queue_used[BITS_TO_LONGS(IWL_MAX_TVQM_QUEUES)];
	unsigned long queue_stopped[BITS_TO_LONGS(IWL_MAX_TVQM_QUEUES)];
	struct iwl_txq *txq[IWL_MAX_TVQM_QUEUES];
	struct dma_pool *bc_pool;
	size_t bc_tbl_size;
	bool bc_table_dword;
	u8 page_offs;
	u8 dev_cmd_offs;
	struct __percpu iwl_tso_hdr_page * tso_hdr_page;

	struct {
		u8 fifo;
		u8 q_id;
		unsigned int wdg_timeout;
	} cmd;

	struct {
		u8 max_tbs;
		u16 size;
		u8 addr_size;
	} tfd;

	struct iwl_dma_ptr scd_bc_tbls;
};

/**
 * struct iwl_trans - transport common data
 *
 * @ops - pointer to iwl_trans_ops
 * @op_mode - pointer to the op_mode
 * @trans_cfg: the trans-specific configuration part
 * @cfg - pointer to the configuration
 * @drv - pointer to iwl_drv
 * @status: a bit-mask of transport status flags
 * @dev - pointer to struct device * that represents the device
 * @max_skb_frags: maximum number of fragments an SKB can have when transmitted.
 *	0 indicates that frag SKBs (NETIF_F_SG) aren't supported.
 * @hw_rf_id a u32 with the device RF ID
 * @hw_id: a u32 with the ID of the device / sub-device.
 *	Set during transport allocation.
 * @hw_id_str: a string with info about HW ID. Set during transport allocation.
 * @pm_support: set to true in start_hw if link pm is supported
 * @ltr_enabled: set to true if the LTR is enabled
 * @wide_cmd_header: true when ucode supports wide command header format
 * @wait_command_queue: wait queue for sync commands
 * @num_rx_queues: number of RX queues allocated by the transport;
 *	the transport must set this before calling iwl_drv_start()
 * @iml_len: the length of the image loader
 * @iml: a pointer to the image loader itself
 * @dev_cmd_pool: pool for Tx cmd allocation - for internal use only.
 *	The user should use iwl_trans_{alloc,free}_tx_cmd.
 * @rx_mpdu_cmd: MPDU RX command ID, must be assigned by opmode before
 *	starting the firmware, used for tracing
 * @rx_mpdu_cmd_hdr_size: used for tracing, amount of data before the
 *	start of the 802.11 header in the @rx_mpdu_cmd
 * @dflt_pwr_limit: default power limit fetched from the platform (ACPI)
 * @system_pm_mode: the system-wide power management mode in use.
 *	This mode is set dynamically, depending on the WoWLAN values
 *	configured from the userspace at runtime.
 * @iwl_trans_txqs: transport tx queues data.
 */
struct iwl_trans {
	const struct iwl_trans_ops *ops;
	struct iwl_op_mode *op_mode;
	const struct iwl_cfg_trans_params *trans_cfg;
	const struct iwl_cfg *cfg;
	struct iwl_drv *drv;
	enum iwl_trans_state state;
	unsigned long status;

	struct device *dev;
	u32 max_skb_frags;
	u32 hw_rev;
	u32 hw_rf_id;
	u32 hw_id;
	char hw_id_str[52];
	u32 sku_id[3];

	u8 rx_mpdu_cmd, rx_mpdu_cmd_hdr_size;

	bool pm_support;
	bool ltr_enabled;
	u8 pnvm_loaded:1;
	u8 reduce_power_loaded:1;

	const struct iwl_hcmd_arr *command_groups;
	int command_groups_size;
	bool wide_cmd_header;

	wait_queue_head_t wait_command_queue;
	u8 num_rx_queues;

	size_t iml_len;
	u8 *iml;

	/* The following fields are internal only */
	struct kmem_cache *dev_cmd_pool;
	char dev_cmd_pool_name[50];

	struct dentry *dbgfs_dir;

#ifdef CONFIG_LOCKDEP
	struct lockdep_map sync_cmd_lockdep_map;
#endif

	struct iwl_trans_debug dbg;
	struct iwl_self_init_dram init_dram;

	enum iwl_plat_pm_mode system_pm_mode;

	const char *name;
	struct iwl_trans_txqs txqs;

	/* pointer to trans specific struct */
	/*Ensure that this pointer will always be aligned to sizeof pointer */
	char trans_specific[] __aligned(sizeof(void *));
};

const char *iwl_get_cmd_string(struct iwl_trans *trans, u32 id);
int iwl_cmd_groups_verify_sorted(const struct iwl_trans_config *trans);

static inline void iwl_trans_configure(struct iwl_trans *trans,
				       const struct iwl_trans_config *trans_cfg)
{
	trans->op_mode = trans_cfg->op_mode;

	trans->ops->configure(trans, trans_cfg);
	WARN_ON(iwl_cmd_groups_verify_sorted(trans_cfg));
}

static inline int iwl_trans_start_hw(struct iwl_trans *trans)
{
	might_sleep();

	return trans->ops->start_hw(trans);
}

static inline void iwl_trans_op_mode_leave(struct iwl_trans *trans)
{
	might_sleep();

	if (trans->ops->op_mode_leave)
		trans->ops->op_mode_leave(trans);

	trans->op_mode = NULL;

	trans->state = IWL_TRANS_NO_FW;
}

static inline void iwl_trans_fw_alive(struct iwl_trans *trans, u32 scd_addr)
{
	might_sleep();

	trans->state = IWL_TRANS_FW_ALIVE;

	trans->ops->fw_alive(trans, scd_addr);
}

static inline int iwl_trans_start_fw(struct iwl_trans *trans,
				     const struct fw_img *fw,
				     bool run_in_rfkill)
{
	int ret;

	might_sleep();

	WARN_ON_ONCE(!trans->rx_mpdu_cmd);

	clear_bit(STATUS_FW_ERROR, &trans->status);
	ret = trans->ops->start_fw(trans, fw, run_in_rfkill);
	if (ret == 0)
		trans->state = IWL_TRANS_FW_STARTED;

	return ret;
}

static inline void iwl_trans_stop_device(struct iwl_trans *trans)
{
	might_sleep();

	trans->ops->stop_device(trans);

	trans->state = IWL_TRANS_NO_FW;
}

static inline int iwl_trans_d3_suspend(struct iwl_trans *trans, bool test,
				       bool reset)
{
	might_sleep();
	if (!trans->ops->d3_suspend)
		return 0;

	return trans->ops->d3_suspend(trans, test, reset);
}

static inline int iwl_trans_d3_resume(struct iwl_trans *trans,
				      enum iwl_d3_status *status,
				      bool test, bool reset)
{
	might_sleep();
	if (!trans->ops->d3_resume)
		return 0;

	return trans->ops->d3_resume(trans, status, test, reset);
}

static inline struct iwl_trans_dump_data *
iwl_trans_dump_data(struct iwl_trans *trans, u32 dump_mask)
{
	if (!trans->ops->dump_data)
		return NULL;
	return trans->ops->dump_data(trans, dump_mask);
}

static inline struct iwl_device_tx_cmd *
iwl_trans_alloc_tx_cmd(struct iwl_trans *trans)
{
	return kmem_cache_zalloc(trans->dev_cmd_pool, GFP_ATOMIC);
}

int iwl_trans_send_cmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd);

static inline void iwl_trans_free_tx_cmd(struct iwl_trans *trans,
					 struct iwl_device_tx_cmd *dev_cmd)
{
	kmem_cache_free(trans->dev_cmd_pool, dev_cmd);
}

static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb,
			       struct iwl_device_tx_cmd *dev_cmd, int queue)
{
	if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status)))
		return -EIO;

	if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
		IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
		return -EIO;
	}

	return trans->ops->tx(trans, skb, dev_cmd, queue);
}

static inline void iwl_trans_reclaim(struct iwl_trans *trans, int queue,
				     int ssn, struct sk_buff_head *skbs)
{
	if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
		IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
		return;
	}

	trans->ops->reclaim(trans, queue, ssn, skbs);
}

static inline void iwl_trans_set_q_ptrs(struct iwl_trans *trans, int queue,
					int ptr)
{
	if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
		IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
		return;
	}

	trans->ops->set_q_ptrs(trans, queue, ptr);
}

static inline void iwl_trans_txq_disable(struct iwl_trans *trans, int queue,
					 bool configure_scd)
{
	trans->ops->txq_disable(trans, queue, configure_scd);
}

static inline bool
iwl_trans_txq_enable_cfg(struct iwl_trans *trans, int queue, u16 ssn,
			 const struct iwl_trans_txq_scd_cfg *cfg,
			 unsigned int queue_wdg_timeout)
{
	might_sleep();

	if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
		IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
		return false;
	}

	return trans->ops->txq_enable(trans, queue, ssn,
				      cfg, queue_wdg_timeout);
}

static inline int
iwl_trans_get_rxq_dma_data(struct iwl_trans *trans, int queue,
			   struct iwl_trans_rxq_dma_data *data)
{
	if (WARN_ON_ONCE(!trans->ops->rxq_dma_data))
		return -ENOTSUPP;

	return trans->ops->rxq_dma_data(trans, queue, data);
}

static inline void
iwl_trans_txq_free(struct iwl_trans *trans, int queue)
{
	if (WARN_ON_ONCE(!trans->ops->txq_free))
		return;

	trans->ops->txq_free(trans, queue);
}

static inline int
iwl_trans_txq_alloc(struct iwl_trans *trans,
		    __le16 flags, u8 sta_id, u8 tid,
		    int cmd_id, int size,
		    unsigned int wdg_timeout)
{
	might_sleep();

	if (WARN_ON_ONCE(!trans->ops->txq_alloc))
		return -ENOTSUPP;

	if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
		IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
		return -EIO;
	}

	return trans->ops->txq_alloc(trans, flags, sta_id, tid,
				     cmd_id, size, wdg_timeout);
}

static inline void iwl_trans_txq_set_shared_mode(struct iwl_trans *trans,
						 int queue, bool shared_mode)
{
	if (trans->ops->txq_set_shared_mode)
		trans->ops->txq_set_shared_mode(trans, queue, shared_mode);
}

static inline void iwl_trans_txq_enable(struct iwl_trans *trans, int queue,
					int fifo, int sta_id, int tid,
					int frame_limit, u16 ssn,
					unsigned int queue_wdg_timeout)
{
	struct iwl_trans_txq_scd_cfg cfg = {
		.fifo = fifo,
		.sta_id = sta_id,
		.tid = tid,
		.frame_limit = frame_limit,
		.aggregate = sta_id >= 0,
	};

	iwl_trans_txq_enable_cfg(trans, queue, ssn, &cfg, queue_wdg_timeout);
}

static inline
void iwl_trans_ac_txq_enable(struct iwl_trans *trans, int queue, int fifo,
			     unsigned int queue_wdg_timeout)
{
	struct iwl_trans_txq_scd_cfg cfg = {
		.fifo = fifo,
		.sta_id = -1,
		.tid = IWL_MAX_TID_COUNT,
		.frame_limit = IWL_FRAME_LIMIT,
		.aggregate = false,
	};

	iwl_trans_txq_enable_cfg(trans, queue, 0, &cfg, queue_wdg_timeout);
}

static inline void iwl_trans_freeze_txq_timer(struct iwl_trans *trans,
					      unsigned long txqs,
					      bool freeze)
{
	if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
		IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
		return;
	}

	if (trans->ops->freeze_txq_timer)
		trans->ops->freeze_txq_timer(trans, txqs, freeze);
}

static inline void iwl_trans_block_txq_ptrs(struct iwl_trans *trans,
					    bool block)
{
	if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
		IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
		return;
	}

	if (trans->ops->block_txq_ptrs)
		trans->ops->block_txq_ptrs(trans, block);
}

static inline int iwl_trans_wait_tx_queues_empty(struct iwl_trans *trans,
						 u32 txqs)
{
	if (WARN_ON_ONCE(!trans->ops->wait_tx_queues_empty))
		return -ENOTSUPP;

	/* No need to wait if the firmware is not alive */
	if (trans->state != IWL_TRANS_FW_ALIVE) {
		IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
		return -EIO;
	}

	return trans->ops->wait_tx_queues_empty(trans, txqs);
}

static inline int iwl_trans_wait_txq_empty(struct iwl_trans *trans, int queue)
{
	if (WARN_ON_ONCE(!trans->ops->wait_txq_empty))
		return -ENOTSUPP;

	if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) {
		IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
		return -EIO;
	}

	return trans->ops->wait_txq_empty(trans, queue);
}

static inline void iwl_trans_write8(struct iwl_trans *trans, u32 ofs, u8 val)
{
	trans->ops->write8(trans, ofs, val);
}

static inline void iwl_trans_write32(struct iwl_trans *trans, u32 ofs, u32 val)
{
	trans->ops->write32(trans, ofs, val);
}

static inline u32 iwl_trans_read32(struct iwl_trans *trans, u32 ofs)
{
	return trans->ops->read32(trans, ofs);
}

static inline u32 iwl_trans_read_prph(struct iwl_trans *trans, u32 ofs)
{
	return trans->ops->read_prph(trans, ofs);
}

static inline void iwl_trans_write_prph(struct iwl_trans *trans, u32 ofs,
					u32 val)
{
	return trans->ops->write_prph(trans, ofs, val);
}

static inline int iwl_trans_read_mem(struct iwl_trans *trans, u32 addr,
				     void *buf, int dwords)
{
	return trans->ops->read_mem(trans, addr, buf, dwords);
}

#define iwl_trans_read_mem_bytes(trans, addr, buf, bufsize)		      \
	do {								      \
		if (__builtin_constant_p(bufsize))			      \
			BUILD_BUG_ON((bufsize) % sizeof(u32));		      \
		iwl_trans_read_mem(trans, addr, buf, (bufsize) / sizeof(u32));\
	} while (0)

static inline u32 iwl_trans_read_mem32(struct iwl_trans *trans, u32 addr)
{
	u32 value;

	if (WARN_ON(iwl_trans_read_mem(trans, addr, &value, 1)))
		return 0xa5a5a5a5;

	return value;
}

static inline int iwl_trans_write_mem(struct iwl_trans *trans, u32 addr,
				      const void *buf, int dwords)
{
	return trans->ops->write_mem(trans, addr, buf, dwords);
}

static inline u32 iwl_trans_write_mem32(struct iwl_trans *trans, u32 addr,
					u32 val)
{
	return iwl_trans_write_mem(trans, addr, &val, 1);
}

static inline void iwl_trans_set_pmi(struct iwl_trans *trans, bool state)
{
	if (trans->ops->set_pmi)
		trans->ops->set_pmi(trans, state);
}

static inline void iwl_trans_sw_reset(struct iwl_trans *trans)
{
	if (trans->ops->sw_reset)
		trans->ops->sw_reset(trans);
}

static inline void
iwl_trans_set_bits_mask(struct iwl_trans *trans, u32 reg, u32 mask, u32 value)
{
	trans->ops->set_bits_mask(trans, reg, mask, value);
}

#define iwl_trans_grab_nic_access(trans)		\
	__cond_lock(nic_access,				\
		    likely((trans)->ops->grab_nic_access(trans)))

static inline void __releases(nic_access)
iwl_trans_release_nic_access(struct iwl_trans *trans)
{
	trans->ops->release_nic_access(trans);
	__release(nic_access);
}

static inline void iwl_trans_fw_error(struct iwl_trans *trans)
{
	if (WARN_ON_ONCE(!trans->op_mode))
		return;

	/* prevent double restarts due to the same erroneous FW */
	if (!test_and_set_bit(STATUS_FW_ERROR, &trans->status)) {
		iwl_op_mode_nic_error(trans->op_mode);
		trans->state = IWL_TRANS_NO_FW;
	}
}

static inline bool iwl_trans_fw_running(struct iwl_trans *trans)
{
	return trans->state == IWL_TRANS_FW_ALIVE;
}

static inline void iwl_trans_sync_nmi(struct iwl_trans *trans)
{
	if (trans->ops->sync_nmi)
		trans->ops->sync_nmi(trans);
}

void iwl_trans_sync_nmi_with_addr(struct iwl_trans *trans, u32 inta_addr,
				  u32 sw_err_bit);

static inline int iwl_trans_set_pnvm(struct iwl_trans *trans,
				     const void *data, u32 len)
{
	if (trans->ops->set_pnvm) {
		int ret = trans->ops->set_pnvm(trans, data, len);

		if (ret)
			return ret;
	}

	trans->pnvm_loaded = true;

	return 0;
}

static inline int iwl_trans_set_reduce_power(struct iwl_trans *trans,
					     const void *data, u32 len)
{
	if (trans->ops->set_reduce_power) {
		int ret = trans->ops->set_reduce_power(trans, data, len);

		if (ret)
			return ret;
	}

	trans->reduce_power_loaded = true;
	return 0;
}

static inline bool iwl_trans_dbg_ini_valid(struct iwl_trans *trans)
{
	return trans->dbg.internal_ini_cfg != IWL_INI_CFG_STATE_NOT_LOADED ||
		trans->dbg.external_ini_cfg != IWL_INI_CFG_STATE_NOT_LOADED;
}

static inline void iwl_trans_interrupts(struct iwl_trans *trans, bool enable)
{
	if (trans->ops->interrupts)
		trans->ops->interrupts(trans, enable);
}

/*****************************************************
 * transport helper functions
 *****************************************************/
struct iwl_trans *iwl_trans_alloc(unsigned int priv_size,
			  struct device *dev,
			  const struct iwl_trans_ops *ops,
			  const struct iwl_cfg_trans_params *cfg_trans);
int iwl_trans_init(struct iwl_trans *trans);
void iwl_trans_free(struct iwl_trans *trans);

/*****************************************************
* driver (transport) register/unregister functions
******************************************************/
int __must_check iwl_pci_register_driver(void);
void iwl_pci_unregister_driver(void);

#endif /* __iwl_trans_h__ */