aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/wireless/iwlwifi/iwl-dev.h
blob: c32012e502dc817339c45544ba1abad35951379b (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
/******************************************************************************
 *
 * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 *****************************************************************************/
/*
 * Please use this file (iwl-dev.h) for driver implementation definitions.
 * Please use iwl-commands.h for uCode API definitions.
 * Please use iwl-4965-hw.h for hardware-related definitions.
 */

#ifndef __iwl_dev_h__
#define __iwl_dev_h__

#include <linux/pci.h> /* for struct pci_device_id */
#include <linux/kernel.h>
#include <net/ieee80211_radiotap.h>

#define DRV_NAME        "iwlagn"
#include "iwl-rfkill.h"
#include "iwl-eeprom.h"
#include "iwl-4965-hw.h"
#include "iwl-csr.h"
#include "iwl-prph.h"
#include "iwl-debug.h"
#include "iwl-led.h"
#include "iwl-power.h"
#include "iwl-agn-rs.h"

/* configuration for the iwl4965 */
extern struct iwl_cfg iwl4965_agn_cfg;
extern struct iwl_cfg iwl5300_agn_cfg;
extern struct iwl_cfg iwl5100_agn_cfg;
extern struct iwl_cfg iwl5350_agn_cfg;
extern struct iwl_cfg iwl5100_bg_cfg;
extern struct iwl_cfg iwl5100_abg_cfg;
extern struct iwl_cfg iwl5150_agn_cfg;

/* CT-KILL constants */
#define CT_KILL_THRESHOLD	110 /* in Celsius */

/* Default noise level to report when noise measurement is not available.
 *   This may be because we're:
 *   1)  Not associated (4965, no beacon statistics being sent to driver)
 *   2)  Scanning (noise measurement does not apply to associated channel)
 *   3)  Receiving CCK (3945 delivers noise info only for OFDM frames)
 * Use default noise value of -127 ... this is below the range of measurable
 *   Rx dBm for either 3945 or 4965, so it can indicate "unmeasurable" to user.
 *   Also, -127 works better than 0 when averaging frames with/without
 *   noise info (e.g. averaging might be done in app); measured dBm values are
 *   always negative ... using a negative value as the default keeps all
 *   averages within an s8's (used in some apps) range of negative values. */
#define IWL_NOISE_MEAS_NOT_AVAILABLE (-127)

/*
 * RTS threshold here is total size [2347] minus 4 FCS bytes
 * Per spec:
 *   a value of 0 means RTS on all data/management packets
 *   a value > max MSDU size means no RTS
 * else RTS for data/management frames where MPDU is larger
 *   than RTS value.
 */
#define DEFAULT_RTS_THRESHOLD     2347U
#define MIN_RTS_THRESHOLD         0U
#define MAX_RTS_THRESHOLD         2347U
#define MAX_MSDU_SIZE		  2304U
#define MAX_MPDU_SIZE		  2346U
#define DEFAULT_BEACON_INTERVAL   100U
#define	DEFAULT_SHORT_RETRY_LIMIT 7U
#define	DEFAULT_LONG_RETRY_LIMIT  4U

struct iwl_rx_mem_buffer {
	dma_addr_t real_dma_addr;
	dma_addr_t aligned_dma_addr;
	struct sk_buff *skb;
	struct list_head list;
};

/*
 * Generic queue structure
 *
 * Contains common data for Rx and Tx queues
 */
struct iwl_queue {
	int n_bd;              /* number of BDs in this queue */
	int write_ptr;       /* 1-st empty entry (index) host_w*/
	int read_ptr;         /* last used entry (index) host_r*/
	dma_addr_t dma_addr;   /* physical addr for BD's */
	int n_window;	       /* safe queue window */
	u32 id;
	int low_mark;	       /* low watermark, resume queue if free
				* space more than this */
	int high_mark;         /* high watermark, stop queue if free
				* space less than this */
} __attribute__ ((packed));

/* One for each TFD */
struct iwl_tx_info {
	struct sk_buff *skb[IWL_NUM_OF_TBS - 1];
};

/**
 * struct iwl_tx_queue - Tx Queue for DMA
 * @q: generic Rx/Tx queue descriptor
 * @bd: base of circular buffer of TFDs
 * @cmd: array of command/Tx buffers
 * @dma_addr_cmd: physical address of cmd/tx buffer array
 * @txb: array of per-TFD driver data
 * @need_update: indicates need to update read/write index
 * @sched_retry: indicates queue is high-throughput aggregation (HT AGG) enabled
 *
 * A Tx queue consists of circular buffer of BDs (a.k.a. TFDs, transmit frame
 * descriptors) and required locking structures.
 */
struct iwl_tx_queue {
	struct iwl_queue q;
	struct iwl_tfd *tfds;
	struct iwl_cmd *cmd[TFD_TX_CMD_SLOTS];
	struct iwl_tx_info *txb;
	u8 need_update;
	u8 sched_retry;
	u8 active;
	u8 swq_id;
};

#define IWL_NUM_SCAN_RATES         (2)

struct iwl4965_channel_tgd_info {
	u8 type;
	s8 max_power;
};

struct iwl4965_channel_tgh_info {
	s64 last_radar_time;
};

/*
 * One for each channel, holds all channel setup data
 * Some of the fields (e.g. eeprom and flags/max_power_avg) are redundant
 *     with one another!
 */
struct iwl_channel_info {
	struct iwl4965_channel_tgd_info tgd;
	struct iwl4965_channel_tgh_info tgh;
	struct iwl_eeprom_channel eeprom;	/* EEPROM regulatory limit */
	struct iwl_eeprom_channel fat_eeprom;	/* EEPROM regulatory limit for
						 * FAT channel */

	u8 channel;	  /* channel number */
	u8 flags;	  /* flags copied from EEPROM */
	s8 max_power_avg; /* (dBm) regul. eeprom, normal Tx, any rate */
	s8 curr_txpow;	  /* (dBm) regulatory/spectrum/user (not h/w) limit */
	s8 min_power;	  /* always 0 */
	s8 scan_power;	  /* (dBm) regul. eeprom, direct scans, any rate */

	u8 group_index;	  /* 0-4, maps channel to group1/2/3/4/5 */
	u8 band_index;	  /* 0-4, maps channel to band1/2/3/4/5 */
	enum ieee80211_band band;

	/* FAT channel info */
	s8 fat_max_power_avg;	/* (dBm) regul. eeprom, normal Tx, any rate */
	s8 fat_curr_txpow;	/* (dBm) regulatory/spectrum/user (not h/w) */
	s8 fat_min_power;	/* always 0 */
	s8 fat_scan_power;	/* (dBm) eeprom, direct scans, any rate */
	u8 fat_flags;		/* flags copied from EEPROM */
	u8 fat_extension_channel; /* HT_IE_EXT_CHANNEL_* */
};

struct iwl4965_clip_group {
	/* maximum power level to prevent clipping for each rate, derived by
	 *   us from this band's saturation power in EEPROM */
	const s8 clip_powers[IWL_MAX_RATES];
};


#define IWL_TX_FIFO_AC0	0
#define IWL_TX_FIFO_AC1	1
#define IWL_TX_FIFO_AC2	2
#define IWL_TX_FIFO_AC3	3
#define IWL_TX_FIFO_HCCA_1	5
#define IWL_TX_FIFO_HCCA_2	6
#define IWL_TX_FIFO_NONE	7

/* Minimum number of queues. MAX_NUM is defined in hw specific files */
#define IWL_MIN_NUM_QUEUES	4

/* Power management (not Tx power) structures */

enum iwl_pwr_src {
	IWL_PWR_SRC_VMAIN,
	IWL_PWR_SRC_VAUX,
};

#define IEEE80211_DATA_LEN              2304
#define IEEE80211_4ADDR_LEN             30
#define IEEE80211_HLEN                  (IEEE80211_4ADDR_LEN)
#define IEEE80211_FRAME_LEN             (IEEE80211_DATA_LEN + IEEE80211_HLEN)

struct iwl_frame {
	union {
		struct ieee80211_hdr frame;
		struct iwl_tx_beacon_cmd beacon;
		u8 raw[IEEE80211_FRAME_LEN];
		u8 cmd[360];
	} u;
	struct list_head list;
};

#define SEQ_TO_SN(seq) (((seq) & IEEE80211_SCTL_SEQ) >> 4)
#define SN_TO_SEQ(ssn) (((ssn) << 4) & IEEE80211_SCTL_SEQ)
#define MAX_SN ((IEEE80211_SCTL_SEQ) >> 4)

enum {
	/* CMD_SIZE_NORMAL = 0, */
	CMD_SIZE_HUGE = (1 << 0),
	/* CMD_SYNC = 0, */
	CMD_ASYNC = (1 << 1),
	/* CMD_NO_SKB = 0, */
	CMD_WANT_SKB = (1 << 2),
};

struct iwl_cmd;
struct iwl_priv;

struct iwl_cmd_meta {
	struct iwl_cmd_meta *source;
	union {
		struct sk_buff *skb;
		int (*callback)(struct iwl_priv *priv,
				struct iwl_cmd *cmd, struct sk_buff *skb);
	} __attribute__ ((packed)) u;

	/* The CMD_SIZE_HUGE flag bit indicates that the command
	 * structure is stored at the end of the shared queue memory. */
	u32 flags;
	DECLARE_PCI_UNMAP_ADDR(mapping)
	DECLARE_PCI_UNMAP_LEN(len)
} __attribute__ ((packed));

#define IWL_CMD_MAX_PAYLOAD 320

/**
 * struct iwl_cmd
 *
 * For allocation of the command and tx queues, this establishes the overall
 * size of the largest command we send to uCode, except for a scan command
 * (which is relatively huge; space is allocated separately).
 */
struct iwl_cmd {
	struct iwl_cmd_meta meta;	/* driver data */
	struct iwl_cmd_header hdr;	/* uCode API */
	union {
		u32 flags;
		u8 val8;
		u16 val16;
		u32 val32;
		struct iwl_tx_cmd tx;
		u8 payload[IWL_CMD_MAX_PAYLOAD];
	} __attribute__ ((packed)) cmd;
} __attribute__ ((packed));


struct iwl_host_cmd {
	u8 id;
	u16 len;
	struct iwl_cmd_meta meta;
	const void *data;
};

#define TFD_MAX_PAYLOAD_SIZE (sizeof(struct iwl_cmd) - \
			      sizeof(struct iwl_cmd_meta))

/*
 * RX related structures and functions
 */
#define RX_FREE_BUFFERS 64
#define RX_LOW_WATERMARK 8

#define SUP_RATE_11A_MAX_NUM_CHANNELS  8
#define SUP_RATE_11B_MAX_NUM_CHANNELS  4
#define SUP_RATE_11G_MAX_NUM_CHANNELS  12

/**
 * struct iwl_rx_queue - Rx queue
 * @read: Shared index to newest available Rx buffer
 * @write: Shared index to oldest written Rx packet
 * @free_count: Number of pre-allocated buffers in rx_free
 * @rx_free: list of free SKBs for use
 * @rx_used: List of Rx buffers with no SKB
 * @need_update: flag to indicate we need to update read/write index
 *
 * NOTE:  rx_free and rx_used are used as a FIFO for iwl_rx_mem_buffers
 */
struct iwl_rx_queue {
	__le32 *bd;
	dma_addr_t dma_addr;
	struct iwl_rx_mem_buffer pool[RX_QUEUE_SIZE + RX_FREE_BUFFERS];
	struct iwl_rx_mem_buffer *queue[RX_QUEUE_SIZE];
	u32 read;
	u32 write;
	u32 free_count;
	struct list_head rx_free;
	struct list_head rx_used;
	int need_update;
	struct iwl_rb_status *rb_stts;
	dma_addr_t rb_stts_dma;
	spinlock_t lock;
};

#define IWL_SUPPORTED_RATES_IE_LEN         8

#define SCAN_INTERVAL 100

#define MAX_A_CHANNELS  252
#define MIN_A_CHANNELS  7

#define MAX_B_CHANNELS  14
#define MIN_B_CHANNELS  1

#define MAX_TID_COUNT        9

#define IWL_INVALID_RATE     0xFF
#define IWL_INVALID_VALUE    -1

/**
 * struct iwl_ht_agg -- aggregation status while waiting for block-ack
 * @txq_id: Tx queue used for Tx attempt
 * @frame_count: # frames attempted by Tx command
 * @wait_for_ba: Expect block-ack before next Tx reply
 * @start_idx: Index of 1st Transmit Frame Descriptor (TFD) in Tx window
 * @bitmap0: Low order bitmap, one bit for each frame pending ACK in Tx window
 * @bitmap1: High order, one bit for each frame pending ACK in Tx window
 * @rate_n_flags: Rate at which Tx was attempted
 *
 * If REPLY_TX indicates that aggregation was attempted, driver must wait
 * for block ack (REPLY_COMPRESSED_BA).  This struct stores tx reply info
 * until block ack arrives.
 */
struct iwl_ht_agg {
	u16 txq_id;
	u16 frame_count;
	u16 wait_for_ba;
	u16 start_idx;
	u64 bitmap;
	u32 rate_n_flags;
#define IWL_AGG_OFF 0
#define IWL_AGG_ON 1
#define IWL_EMPTYING_HW_QUEUE_ADDBA 2
#define IWL_EMPTYING_HW_QUEUE_DELBA 3
	u8 state;
};


struct iwl_tid_data {
	u16 seq_number;
	u16 tfds_in_queue;
	struct iwl_ht_agg agg;
};

struct iwl_hw_key {
	enum ieee80211_key_alg alg;
	int keylen;
	u8 keyidx;
	u8 key[32];
};

union iwl4965_ht_rate_supp {
	u16 rates;
	struct {
		u8 siso_rate;
		u8 mimo_rate;
	};
};

#define CFG_HT_RX_AMPDU_FACTOR_DEF  (0x3)
#define CFG_HT_MPDU_DENSITY_2USEC   (0x5)
#define CFG_HT_MPDU_DENSITY_DEF CFG_HT_MPDU_DENSITY_2USEC

struct iwl_ht_info {
	/* self configuration data */
	u8 is_ht;
	u8 supported_chan_width;
	u8 sm_ps;
	u8 is_green_field;
	u8 sgf;			/* HT_SHORT_GI_* short guard interval */
	u8 max_amsdu_size;
	u8 ampdu_factor;
	u8 mpdu_density;
	struct ieee80211_mcs_info mcs;
	/* BSS related data */
	u8 extension_chan_offset;
	u8 tx_chan_width;
	u8 ht_protection;
	u8 non_GF_STA_present;
};

union iwl_qos_capabity {
	struct {
		u8 edca_count:4;	/* bit 0-3 */
		u8 q_ack:1;		/* bit 4 */
		u8 queue_request:1;	/* bit 5 */
		u8 txop_request:1;	/* bit 6 */
		u8 reserved:1;		/* bit 7 */
	} q_AP;
	struct {
		u8 acvo_APSD:1;		/* bit 0 */
		u8 acvi_APSD:1;		/* bit 1 */
		u8 ac_bk_APSD:1;	/* bit 2 */
		u8 ac_be_APSD:1;	/* bit 3 */
		u8 q_ack:1;		/* bit 4 */
		u8 max_len:2;		/* bit 5-6 */
		u8 more_data_ack:1;	/* bit 7 */
	} q_STA;
	u8 val;
};

/* QoS structures */
struct iwl_qos_info {
	int qos_enable;
	int qos_active;
	union iwl_qos_capabity qos_cap;
	struct iwl_qosparam_cmd def_qos_parm;
};

#define STA_PS_STATUS_WAKE             0
#define STA_PS_STATUS_SLEEP            1

struct iwl_station_entry {
	struct iwl_addsta_cmd sta;
	struct iwl_tid_data tid[MAX_TID_COUNT];
	u8 used;
	u8 ps_status;
	struct iwl_hw_key keyinfo;
};

/* one for each uCode image (inst/data, boot/init/runtime) */
struct fw_desc {
	void *v_addr;		/* access by driver */
	dma_addr_t p_addr;	/* access by card's busmaster DMA */
	u32 len;		/* bytes */
};

/* uCode file layout */
struct iwl_ucode {
	__le32 ver;		/* major/minor/API/serial */
	__le32 inst_size;	/* bytes of runtime instructions */
	__le32 data_size;	/* bytes of runtime data */
	__le32 init_size;	/* bytes of initialization instructions */
	__le32 init_data_size;	/* bytes of initialization data */
	__le32 boot_size;	/* bytes of bootstrap instructions */
	u8 data[0];		/* data in same order as "size" elements */
};

struct iwl4965_ibss_seq {
	u8 mac[ETH_ALEN];
	u16 seq_num;
	u16 frag_num;
	unsigned long packet_time;
	struct list_head list;
};

struct iwl_sensitivity_ranges {
	u16 min_nrg_cck;
	u16 max_nrg_cck;

	u16 nrg_th_cck;
	u16 nrg_th_ofdm;

	u16 auto_corr_min_ofdm;
	u16 auto_corr_min_ofdm_mrc;
	u16 auto_corr_min_ofdm_x1;
	u16 auto_corr_min_ofdm_mrc_x1;

	u16 auto_corr_max_ofdm;
	u16 auto_corr_max_ofdm_mrc;
	u16 auto_corr_max_ofdm_x1;
	u16 auto_corr_max_ofdm_mrc_x1;

	u16 auto_corr_max_cck;
	u16 auto_corr_max_cck_mrc;
	u16 auto_corr_min_cck;
	u16 auto_corr_min_cck_mrc;
};


#define IWL_FAT_CHANNEL_52 BIT(IEEE80211_BAND_5GHZ)

/**
 * struct iwl_hw_params
 * @max_txq_num: Max # Tx queues supported
 * @dma_chnl_num: Number of Tx DMA/FIFO channels
 * @scd_bc_tbls_size: size of scheduler byte count tables
 * @tx/rx_chains_num: Number of TX/RX chains
 * @valid_tx/rx_ant: usable antennas
 * @max_rxq_size: Max # Rx frames in Rx queue (must be power-of-2)
 * @max_rxq_log: Log-base-2 of max_rxq_size
 * @rx_buf_size: Rx buffer size
 * @max_stations:
 * @bcast_sta_id:
 * @fat_channel: is 40MHz width possible in band 2.4
 * BIT(IEEE80211_BAND_5GHZ) BIT(IEEE80211_BAND_5GHZ)
 * @sw_crypto: 0 for hw, 1 for sw
 * @max_xxx_size: for ucode uses
 * @ct_kill_threshold: temperature threshold
 * @calib_init_cfg: setup initial calibrations for the hw
 * @struct iwl_sensitivity_ranges: range of sensitivity values
 */
struct iwl_hw_params {
	u8 max_txq_num;
	u8 dma_chnl_num;
	u16 scd_bc_tbls_size;
	u8  tx_chains_num;
	u8  rx_chains_num;
	u8  valid_tx_ant;
	u8  valid_rx_ant;
	u16 max_rxq_size;
	u16 max_rxq_log;
	u32 rx_buf_size;
	u32 max_pkt_size;
	u8  max_stations;
	u8  bcast_sta_id;
	u8 fat_channel;
	u8 sw_crypto;
	u32 max_inst_size;
	u32 max_data_size;
	u32 max_bsm_size;
	u32 ct_kill_threshold; /* value in hw-dependent units */
	u32 calib_init_cfg;
	const struct iwl_sensitivity_ranges *sens;
};

#define HT_SHORT_GI_20MHZ	(1 << 0)
#define HT_SHORT_GI_40MHZ	(1 << 1)


/******************************************************************************
 *
 * Functions implemented in core module which are forward declared here
 * for use by iwl-[4-5].c
 *
 * NOTE:  The implementation of these functions are not hardware specific
 * which is why they are in the core module files.
 *
 * Naming convention --
 * iwl_         <-- Is part of iwlwifi
 * iwlXXXX_     <-- Hardware specific (implemented in iwl-XXXX.c for XXXX)
 * iwl4965_bg_      <-- Called from work queue context
 * iwl4965_mac_     <-- mac80211 callback
 *
 ****************************************************************************/
extern void iwl_update_chain_flags(struct iwl_priv *priv);
extern int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src);
extern const u8 iwl_bcast_addr[ETH_ALEN];
extern int iwl_rxq_stop(struct iwl_priv *priv);
extern void iwl_txq_ctx_stop(struct iwl_priv *priv);
extern int iwl_queue_space(const struct iwl_queue *q);
static inline int iwl_queue_used(const struct iwl_queue *q, int i)
{
	return q->write_ptr > q->read_ptr ?
		(i >= q->read_ptr && i < q->write_ptr) :
		!(i < q->read_ptr && i >= q->write_ptr);
}


static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
{
	/* This is for scan command, the big buffer at end of command array */
	if (is_huge)
		return q->n_window;	/* must be power of 2 */

	/* Otherwise, use normal size buffers */
	return index & (q->n_window - 1);
}


struct iwl_priv;


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

#define IWL_CHANNEL_WIDTH_20MHZ   0
#define IWL_CHANNEL_WIDTH_40MHZ   1

#define IWL_OPERATION_MODE_AUTO     0
#define IWL_OPERATION_MODE_HT_ONLY  1
#define IWL_OPERATION_MODE_MIXED    2
#define IWL_OPERATION_MODE_20MHZ    3

#define IWL_TX_CRC_SIZE 4
#define IWL_TX_DELIMITER_SIZE 4

#define TX_POWER_IWL_ILLEGAL_VOLTAGE -10000

/* Sensitivity and chain noise calibration */
#define INTERFERENCE_DATA_AVAILABLE	__constant_cpu_to_le32(1)
#define INITIALIZATION_VALUE		0xFFFF
#define CAL_NUM_OF_BEACONS		20
#define MAXIMUM_ALLOWED_PATHLOSS	15

#define CHAIN_NOISE_MAX_DELTA_GAIN_CODE 3

#define MAX_FA_OFDM  50
#define MIN_FA_OFDM  5
#define MAX_FA_CCK   50
#define MIN_FA_CCK   5

#define AUTO_CORR_STEP_OFDM       1

#define AUTO_CORR_STEP_CCK     3
#define AUTO_CORR_MAX_TH_CCK   160

#define NRG_DIFF               2
#define NRG_STEP_CCK           2
#define NRG_MARGIN             8
#define MAX_NUMBER_CCK_NO_FA 100

#define AUTO_CORR_CCK_MIN_VAL_DEF    (125)

#define CHAIN_A             0
#define CHAIN_B             1
#define CHAIN_C             2
#define CHAIN_NOISE_DELTA_GAIN_INIT_VAL 4
#define ALL_BAND_FILTER			0xFF00
#define IN_BAND_FILTER			0xFF
#define MIN_AVERAGE_NOISE_MAX_VALUE	0xFFFFFFFF

#define NRG_NUM_PREV_STAT_L     20
#define NUM_RX_CHAINS           3

enum iwl4965_false_alarm_state {
	IWL_FA_TOO_MANY = 0,
	IWL_FA_TOO_FEW = 1,
	IWL_FA_GOOD_RANGE = 2,
};

enum iwl4965_chain_noise_state {
	IWL_CHAIN_NOISE_ALIVE = 0,  /* must be 0 */
	IWL_CHAIN_NOISE_ACCUMULATE,
	IWL_CHAIN_NOISE_CALIBRATED,
	IWL_CHAIN_NOISE_DONE,
};

enum iwl4965_calib_enabled_state {
	IWL_CALIB_DISABLED = 0,  /* must be 0 */
	IWL_CALIB_ENABLED = 1,
};

struct statistics_general_data {
	u32 beacon_silence_rssi_a;
	u32 beacon_silence_rssi_b;
	u32 beacon_silence_rssi_c;
	u32 beacon_energy_a;
	u32 beacon_energy_b;
	u32 beacon_energy_c;
};


/*
 * enum iwl_calib
 * defines the order in which results of initial calibrations
 * should be sent to the runtime uCode
 */
enum iwl_calib {
	IWL_CALIB_XTAL,
	IWL_CALIB_DC,
	IWL_CALIB_LO,
	IWL_CALIB_TX_IQ,
	IWL_CALIB_TX_IQ_PERD,
	IWL_CALIB_BASE_BAND,
	IWL_CALIB_MAX
};

/* Opaque calibration results */
struct iwl_calib_result {
	void *buf;
	size_t buf_len;
};

enum ucode_type {
	UCODE_NONE = 0,
	UCODE_INIT,
	UCODE_RT
};

/* Sensitivity calib data */
struct iwl_sensitivity_data {
	u32 auto_corr_ofdm;
	u32 auto_corr_ofdm_mrc;
	u32 auto_corr_ofdm_x1;
	u32 auto_corr_ofdm_mrc_x1;
	u32 auto_corr_cck;
	u32 auto_corr_cck_mrc;

	u32 last_bad_plcp_cnt_ofdm;
	u32 last_fa_cnt_ofdm;
	u32 last_bad_plcp_cnt_cck;
	u32 last_fa_cnt_cck;

	u32 nrg_curr_state;
	u32 nrg_prev_state;
	u32 nrg_value[10];
	u8  nrg_silence_rssi[NRG_NUM_PREV_STAT_L];
	u32 nrg_silence_ref;
	u32 nrg_energy_idx;
	u32 nrg_silence_idx;
	u32 nrg_th_cck;
	s32 nrg_auto_corr_silence_diff;
	u32 num_in_cck_no_fa;
	u32 nrg_th_ofdm;
};

/* Chain noise (differential Rx gain) calib data */
struct iwl_chain_noise_data {
	u32 active_chains;
	u32 chain_noise_a;
	u32 chain_noise_b;
	u32 chain_noise_c;
	u32 chain_signal_a;
	u32 chain_signal_b;
	u32 chain_signal_c;
	u16 beacon_count;
	u8 disconn_array[NUM_RX_CHAINS];
	u8 delta_gain_code[NUM_RX_CHAINS];
	u8 radio_write;
	u8 state;
};

#define	EEPROM_SEM_TIMEOUT 10		/* milliseconds */
#define EEPROM_SEM_RETRY_LIMIT 1000	/* number of attempts (not time) */


enum {
	MEASUREMENT_READY = (1 << 0),
	MEASUREMENT_ACTIVE = (1 << 1),
};


#define IWL_MAX_NUM_QUEUES	20 /* FIXME: do dynamic allocation */

struct iwl_priv {

	/* ieee device used by generic ieee processing code */
	struct ieee80211_hw *hw;
	struct ieee80211_channel *ieee_channels;
	struct ieee80211_rate *ieee_rates;
	struct iwl_cfg *cfg;

	/* temporary frame storage list */
	struct list_head free_frames;
	int frames_count;

	enum ieee80211_band band;
	int alloc_rxb_skb;

	void (*rx_handlers[REPLY_MAX])(struct iwl_priv *priv,
				       struct iwl_rx_mem_buffer *rxb);

	struct ieee80211_supported_band bands[IEEE80211_NUM_BANDS];

#ifdef CONFIG_IWLAGN_SPECTRUM_MEASUREMENT
	/* spectrum measurement report caching */
	struct iwl4965_spectrum_notification measure_report;
	u8 measurement_status;
#endif
	/* ucode beacon time */
	u32 ucode_beacon_time;

	/* we allocate array of iwl4965_channel_info for NIC's valid channels.
	 *    Access via channel # using indirect index array */
	struct iwl_channel_info *channel_info;	/* channel info array */
	u8 channel_count;	/* # of channels */

	/* each calibration channel group in the EEPROM has a derived
	 * clip setting for each rate. */
	const struct iwl4965_clip_group clip_groups[5];

	/* thermal calibration */
	s32 temperature;	/* degrees Kelvin */
	s32 last_temperature;

	/* init calibration results */
	struct iwl_calib_result calib_results[IWL_CALIB_MAX];

	/* Scan related variables */
	unsigned long last_scan_jiffies;
	unsigned long next_scan_jiffies;
	unsigned long scan_start;
	unsigned long scan_pass_start;
	unsigned long scan_start_tsf;
	struct iwl_scan_cmd *scan;
	int scan_bands;
	int one_direct_scan;
	u8 direct_ssid_len;
	u8 direct_ssid[IW_ESSID_MAX_SIZE];
	u8 scan_tx_ant[IEEE80211_NUM_BANDS];
	u8 mgmt_tx_ant;

	/* spinlock */
	spinlock_t lock;	/* protect general shared data */
	spinlock_t hcmd_lock;	/* protect hcmd */
	struct mutex mutex;

	/* basic pci-network driver stuff */
	struct pci_dev *pci_dev;

	/* pci hardware address support */
	void __iomem *hw_base;
	u32  hw_rev;
	u32  hw_wa_rev;
	u8   rev_id;

	/* uCode images, save to reload in case of failure */
	u32 ucode_ver;			/* version of ucode, copy of
					   iwl_ucode.ver */
	struct fw_desc ucode_code;	/* runtime inst */
	struct fw_desc ucode_data;	/* runtime data original */
	struct fw_desc ucode_data_backup;	/* runtime data save/restore */
	struct fw_desc ucode_init;	/* initialization inst */
	struct fw_desc ucode_init_data;	/* initialization data */
	struct fw_desc ucode_boot;	/* bootstrap inst */
	enum ucode_type ucode_type;
	u8 ucode_write_complete;	/* the image write is complete */


	struct iwl_rxon_time_cmd rxon_timing;

	/* We declare this const so it can only be
	 * changed via explicit cast within the
	 * routines that actually update the physical
	 * hardware */
	const struct iwl_rxon_cmd active_rxon;
	struct iwl_rxon_cmd staging_rxon;

	int error_recovering;
	struct iwl_rxon_cmd recovery_rxon;

	/* 1st responses from initialize and runtime uCode images.
	 * 4965's initialize alive response contains some calibration data. */
	struct iwl_init_alive_resp card_alive_init;
	struct iwl_alive_resp card_alive;
#ifdef CONFIG_IWLWIFI_RFKILL
	struct rfkill *rfkill;
#endif

#ifdef CONFIG_IWLWIFI_LEDS
	struct iwl_led led[IWL_LED_TRG_MAX];
	unsigned long last_blink_time;
	u8 last_blink_rate;
	u8 allow_blinking;
	u64 led_tpt;
#endif

	u16 active_rate;
	u16 active_rate_basic;

	u8 assoc_station_added;
	u8 start_calib;
	struct iwl_sensitivity_data sensitivity_data;
	struct iwl_chain_noise_data chain_noise_data;
	__le16 sensitivity_tbl[HD_TABLE_SIZE];

	struct iwl_ht_info current_ht_config;
	u8 last_phy_res[100];

	/* Rate scaling data */
	s8 data_retry_limit;
	u8 retry_rate;

	wait_queue_head_t wait_command_queue;

	int activity_timer_active;

	/* Rx and Tx DMA processing queues */
	struct iwl_rx_queue rxq;
	struct iwl_tx_queue txq[IWL_MAX_NUM_QUEUES];
	unsigned long txq_ctx_active_msk;
	struct iwl_dma_ptr  kw;	/* keep warm address */
	struct iwl_dma_ptr  scd_bc_tbls;

	u32 scd_base_addr;	/* scheduler sram base address */

	unsigned long status;

	int last_rx_rssi;	/* From Rx packet statistics */
	int last_rx_noise;	/* From beacon statistics */

	/* counts mgmt, ctl, and data packets */
	struct traffic_stats {
		u32 cnt;
		u64 bytes;
	} tx_stats[3], rx_stats[3];

	struct iwl_power_mgr power_data;

	struct iwl_notif_statistics statistics;
	unsigned long last_statistics_time;

	/* context information */
	u16 rates_mask;

	u32 power_mode;
	u32 antenna;
	u8 bssid[ETH_ALEN];
	u16 rts_threshold;
	u8 mac_addr[ETH_ALEN];

	/*station table variables */
	spinlock_t sta_lock;
	int num_stations;
	struct iwl_station_entry stations[IWL_STATION_COUNT];
	struct iwl_wep_key wep_keys[WEP_KEYS_MAX];
	u8 default_wep_key;
	u8 key_mapping_key;
	unsigned long ucode_key_table;

	/* Indication if ieee80211_ops->open has been called */
	u8 is_open;

	u8 mac80211_registered;

	/* Rx'd packet timing information */
	u32 last_beacon_time;
	u64 last_tsf;

	/* eeprom */
	u8 *eeprom;
	struct iwl_eeprom_calib_info *calib_info;

	enum nl80211_iftype iw_mode;

	struct sk_buff *ibss_beacon;

	/* Last Rx'd beacon timestamp */
	u64 timestamp;
	u16 beacon_int;
	struct ieee80211_vif *vif;

	struct iwl_hw_params hw_params;


	/* Current association information needed to configure the
	 * hardware */
	u16 assoc_id;
	u16 assoc_capability;

	struct iwl_qos_info qos_data;

	struct workqueue_struct *workqueue;

	struct work_struct up;
	struct work_struct restart;
	struct work_struct calibrated_work;
	struct work_struct scan_completed;
	struct work_struct rx_replenish;
	struct work_struct rf_kill;
	struct work_struct abort_scan;
	struct work_struct update_link_led;
	struct work_struct auth_work;
	struct work_struct report_work;
	struct work_struct request_scan;
	struct work_struct beacon_update;

	struct tasklet_struct irq_tasklet;

	struct delayed_work set_power_save;
	struct delayed_work init_alive_start;
	struct delayed_work alive_start;
	struct delayed_work scan_check;
	/* TX Power */
	s8 tx_power_user_lmt;
	s8 tx_power_channel_lmt;


#ifdef CONFIG_IWLWIFI_DEBUG
	/* debugging info */
	u32 debug_level;
	u32 framecnt_to_us;
	atomic_t restrict_refcnt;
#ifdef CONFIG_IWLWIFI_DEBUGFS
	/* debugfs */
	struct iwl_debugfs *dbgfs;
#endif /* CONFIG_IWLWIFI_DEBUGFS */
#endif /* CONFIG_IWLWIFI_DEBUG */

	struct work_struct txpower_work;
	u32 disable_sens_cal;
	u32 disable_chain_noise_cal;
	u32 disable_tx_power_cal;
	struct work_struct run_time_calib_work;
	struct timer_list statistics_periodic;
}; /*iwl_priv */

static inline void iwl_txq_ctx_activate(struct iwl_priv *priv, int txq_id)
{
	set_bit(txq_id, &priv->txq_ctx_active_msk);
}

static inline void iwl_txq_ctx_deactivate(struct iwl_priv *priv, int txq_id)
{
	clear_bit(txq_id, &priv->txq_ctx_active_msk);
}

#ifdef CONFIG_IWLWIFI_DEBUG
const char *iwl_get_tx_fail_reason(u32 status);
#else
static inline const char *iwl_get_tx_fail_reason(u32 status) { return ""; }
#endif


static inline struct ieee80211_hdr *iwl_tx_queue_get_hdr(struct iwl_priv *priv,
							 int txq_id, int idx)
{
	if (priv->txq[txq_id].txb[idx].skb[0])
		return (struct ieee80211_hdr *)priv->txq[txq_id].
				txb[idx].skb[0]->data;
	return NULL;
}


static inline int iwl_is_associated(struct iwl_priv *priv)
{
	return (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ? 1 : 0;
}

static inline int is_channel_valid(const struct iwl_channel_info *ch_info)
{
	if (ch_info == NULL)
		return 0;
	return (ch_info->flags & EEPROM_CHANNEL_VALID) ? 1 : 0;
}

static inline int is_channel_radar(const struct iwl_channel_info *ch_info)
{
	return (ch_info->flags & EEPROM_CHANNEL_RADAR) ? 1 : 0;
}

static inline u8 is_channel_a_band(const struct iwl_channel_info *ch_info)
{
	return ch_info->band == IEEE80211_BAND_5GHZ;
}

static inline u8 is_channel_bg_band(const struct iwl_channel_info *ch_info)
{
	return ch_info->band == IEEE80211_BAND_2GHZ;
}

static inline int is_channel_passive(const struct iwl_channel_info *ch)
{
	return (!(ch->flags & EEPROM_CHANNEL_ACTIVE)) ? 1 : 0;
}

static inline int is_channel_ibss(const struct iwl_channel_info *ch)
{
	return ((ch->flags & EEPROM_CHANNEL_IBSS)) ? 1 : 0;
}

#endif				/* __iwl_dev_h__ */