summaryrefslogtreecommitdiffstats
path: root/drivers/net/s2io.h
blob: df8cfd0475be07fc50f9fe29d3f653f59efa5a43 (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
/************************************************************************
 * s2io.h: A Linux PCI-X Ethernet driver for S2IO 10GbE Server NIC
 * Copyright(c) 2002-2005 Neterion Inc.

 * This software may be used and distributed according to the terms of
 * the GNU General Public License (GPL), incorporated herein by reference.
 * Drivers based on or derived from this code fall under the GPL and must
 * retain the authorship, copyright and license notice.  This file is not
 * a complete program and may only be used when the entire operating
 * system is licensed under the GPL.
 * See the file COPYING in this distribution for more information.
 ************************************************************************/
#ifndef _S2IO_H
#define _S2IO_H

/* Enable 2 buffer mode by default for SGI system */
#ifdef CONFIG_IA64_SGI_SN2
#define CONFIG_2BUFF_MODE
#endif

#define TBD 0
#define BIT(loc)		(0x8000000000000000ULL >> (loc))
#define vBIT(val, loc, sz)	(((u64)val) << (64-loc-sz))
#define INV(d)  ((d&0xff)<<24) | (((d>>8)&0xff)<<16) | (((d>>16)&0xff)<<8)| ((d>>24)&0xff)

#ifndef BOOL
#define BOOL    int
#endif

#ifndef TRUE
#define TRUE    1
#define FALSE   0
#endif

#undef SUCCESS
#define SUCCESS 0
#define FAILURE -1

/* Maximum time to flicker LED when asked to identify NIC using ethtool */
#define MAX_FLICKER_TIME	60000 /* 60 Secs */

/* Maximum outstanding splits to be configured into xena. */
typedef enum xena_max_outstanding_splits {
	XENA_ONE_SPLIT_TRANSACTION = 0,
	XENA_TWO_SPLIT_TRANSACTION = 1,
	XENA_THREE_SPLIT_TRANSACTION = 2,
	XENA_FOUR_SPLIT_TRANSACTION = 3,
	XENA_EIGHT_SPLIT_TRANSACTION = 4,
	XENA_TWELVE_SPLIT_TRANSACTION = 5,
	XENA_SIXTEEN_SPLIT_TRANSACTION = 6,
	XENA_THIRTYTWO_SPLIT_TRANSACTION = 7
} xena_max_outstanding_splits;
#define XENA_MAX_OUTSTANDING_SPLITS(n) (n << 4)

/*  OS concerned variables and constants */
#define WATCH_DOG_TIMEOUT		15*HZ
#define EFILL				0x1234
#define ALIGN_SIZE			127
#define	PCIX_COMMAND_REGISTER		0x62

/*
 * Debug related variables.
 */
/* different debug levels. */
#define	ERR_DBG		0
#define	INIT_DBG	1
#define	INFO_DBG	2
#define	TX_DBG		3
#define	INTR_DBG	4

/* Global variable that defines the present debug level of the driver. */
int debug_level = ERR_DBG;	/* Default level. */

/* DEBUG message print. */
#define DBG_PRINT(dbg_level, args...)  if(!(debug_level<dbg_level)) printk(args)

/* Protocol assist features of the NIC */
#define L3_CKSUM_OK 0xFFFF
#define L4_CKSUM_OK 0xFFFF
#define S2IO_JUMBO_SIZE 9600

/* Driver statistics maintained by driver */
typedef struct {
	unsigned long long single_ecc_errs;
	unsigned long long double_ecc_errs;
} swStat_t;

/* The statistics block of Xena */
typedef struct stat_block {
/* Tx MAC statistics counters. */
	u32 tmac_data_octets;
	u32 tmac_frms;
	u64 tmac_drop_frms;
	u32 tmac_bcst_frms;
	u32 tmac_mcst_frms;
	u64 tmac_pause_ctrl_frms;
	u32 tmac_ucst_frms;
	u32 tmac_ttl_octets;
	u32 tmac_any_err_frms;
	u32 tmac_nucst_frms;
	u64 tmac_ttl_less_fb_octets;
	u64 tmac_vld_ip_octets;
	u32 tmac_drop_ip;
	u32 tmac_vld_ip;
	u32 tmac_rst_tcp;
	u32 tmac_icmp;
	u64 tmac_tcp;
	u32 reserved_0;
	u32 tmac_udp;

/* Rx MAC Statistics counters. */
	u32 rmac_data_octets;
	u32 rmac_vld_frms;
	u64 rmac_fcs_err_frms;
	u64 rmac_drop_frms;
	u32 rmac_vld_bcst_frms;
	u32 rmac_vld_mcst_frms;
	u32 rmac_out_rng_len_err_frms;
	u32 rmac_in_rng_len_err_frms;
	u64 rmac_long_frms;
	u64 rmac_pause_ctrl_frms;
	u64 rmac_unsup_ctrl_frms;
	u32 rmac_accepted_ucst_frms;
	u32 rmac_ttl_octets;
	u32 rmac_discarded_frms;
	u32 rmac_accepted_nucst_frms;
	u32 reserved_1;
	u32 rmac_drop_events;
	u64 rmac_ttl_less_fb_octets;
	u64 rmac_ttl_frms;
	u64 reserved_2;
	u32 rmac_usized_frms;
	u32 reserved_3;
	u32 rmac_frag_frms;
	u32 rmac_osized_frms;
	u32 reserved_4;
	u32 rmac_jabber_frms;
	u64 rmac_ttl_64_frms;
	u64 rmac_ttl_65_127_frms;
	u64 reserved_5;
	u64 rmac_ttl_128_255_frms;
	u64 rmac_ttl_256_511_frms;
	u64 reserved_6;
	u64 rmac_ttl_512_1023_frms;
	u64 rmac_ttl_1024_1518_frms;
	u32 rmac_ip;
	u32 reserved_7;
	u64 rmac_ip_octets;
	u32 rmac_drop_ip;
	u32 rmac_hdr_err_ip;
	u32 reserved_8;
	u32 rmac_icmp;
	u64 rmac_tcp;
	u32 rmac_err_drp_udp;
	u32 rmac_udp;
	u64 rmac_xgmii_err_sym;
	u64 rmac_frms_q0;
	u64 rmac_frms_q1;
	u64 rmac_frms_q2;
	u64 rmac_frms_q3;
	u64 rmac_frms_q4;
	u64 rmac_frms_q5;
	u64 rmac_frms_q6;
	u64 rmac_frms_q7;
	u16 rmac_full_q3;
	u16 rmac_full_q2;
	u16 rmac_full_q1;
	u16 rmac_full_q0;
	u16 rmac_full_q7;
	u16 rmac_full_q6;
	u16 rmac_full_q5;
	u16 rmac_full_q4;
	u32 reserved_9;
	u32 rmac_pause_cnt;
	u64 rmac_xgmii_data_err_cnt;
	u64 rmac_xgmii_ctrl_err_cnt;
	u32 rmac_err_tcp;
	u32 rmac_accepted_ip;

/* PCI/PCI-X Read transaction statistics. */
	u32 new_rd_req_cnt;
	u32 rd_req_cnt;
	u32 rd_rtry_cnt;
	u32 new_rd_req_rtry_cnt;

/* PCI/PCI-X Write/Read transaction statistics. */
	u32 wr_req_cnt;
	u32 wr_rtry_rd_ack_cnt;
	u32 new_wr_req_rtry_cnt;
	u32 new_wr_req_cnt;
	u32 wr_disc_cnt;
	u32 wr_rtry_cnt;

/*	PCI/PCI-X Write / DMA Transaction statistics. */
	u32 txp_wr_cnt;
	u32 rd_rtry_wr_ack_cnt;
	u32 txd_wr_cnt;
	u32 txd_rd_cnt;
	u32 rxd_wr_cnt;
	u32 rxd_rd_cnt;
	u32 rxf_wr_cnt;
	u32 txf_rd_cnt;

/* Tx MAC statistics overflow counters. */
	u32 tmac_data_octets_oflow;
	u32 tmac_frms_oflow;
	u32 tmac_bcst_frms_oflow;
	u32 tmac_mcst_frms_oflow;
	u32 tmac_ucst_frms_oflow;
	u32 tmac_ttl_octets_oflow;
	u32 tmac_any_err_frms_oflow;
	u32 tmac_nucst_frms_oflow;
	u64 tmac_vlan_frms;
	u32 tmac_drop_ip_oflow;
	u32 tmac_vld_ip_oflow;
	u32 tmac_rst_tcp_oflow;
	u32 tmac_icmp_oflow;
	u32 tpa_unknown_protocol;
	u32 tmac_udp_oflow;
	u32 reserved_10;
	u32 tpa_parse_failure;

/* Rx MAC Statistics overflow counters. */
	u32 rmac_data_octets_oflow;
	u32 rmac_vld_frms_oflow;
	u32 rmac_vld_bcst_frms_oflow;
	u32 rmac_vld_mcst_frms_oflow;
	u32 rmac_accepted_ucst_frms_oflow;
	u32 rmac_ttl_octets_oflow;
	u32 rmac_discarded_frms_oflow;
	u32 rmac_accepted_nucst_frms_oflow;
	u32 rmac_usized_frms_oflow;
	u32 rmac_drop_events_oflow;
	u32 rmac_frag_frms_oflow;
	u32 rmac_osized_frms_oflow;
	u32 rmac_ip_oflow;
	u32 rmac_jabber_frms_oflow;
	u32 rmac_icmp_oflow;
	u32 rmac_drop_ip_oflow;
	u32 rmac_err_drp_udp_oflow;
	u32 rmac_udp_oflow;
	u32 reserved_11;
	u32 rmac_pause_cnt_oflow;
	u64 rmac_ttl_1519_4095_frms;
	u64 rmac_ttl_4096_8191_frms;
	u64 rmac_ttl_8192_max_frms;
	u64 rmac_ttl_gt_max_frms;
	u64 rmac_osized_alt_frms;
	u64 rmac_jabber_alt_frms;
	u64 rmac_gt_max_alt_frms;
	u64 rmac_vlan_frms;
	u32 rmac_len_discard;
	u32 rmac_fcs_discard;
	u32 rmac_pf_discard;
	u32 rmac_da_discard;
	u32 rmac_red_discard;
	u32 rmac_rts_discard;
	u32 reserved_12;
	u32 rmac_ingm_full_discard;
	u32 reserved_13;
	u32 rmac_accepted_ip_oflow;
	u32 reserved_14;
	u32 link_fault_cnt;

/* Software statistics maintained by driver */
	swStat_t sw_stat;
} StatInfo_t;

/*
 * Structures representing different init time configuration
 * parameters of the NIC.
 */

#define MAX_TX_FIFOS 8
#define MAX_RX_RINGS 8

/* FIFO mappings for all possible number of fifos configured */
int fifo_map[][MAX_TX_FIFOS] = {
	{0, 0, 0, 0, 0, 0, 0, 0},
	{0, 0, 0, 0, 1, 1, 1, 1},
	{0, 0, 0, 1, 1, 1, 2, 2},
	{0, 0, 1, 1, 2, 2, 3, 3},
	{0, 0, 1, 1, 2, 2, 3, 4},
	{0, 0, 1, 1, 2, 3, 4, 5},
	{0, 0, 1, 2, 3, 4, 5, 6},
	{0, 1, 2, 3, 4, 5, 6, 7},
};

/* Maintains Per FIFO related information. */
typedef struct tx_fifo_config {
#define	MAX_AVAILABLE_TXDS	8192
	u32 fifo_len;		/* specifies len of FIFO upto 8192, ie no of TxDLs */
/* Priority definition */
#define TX_FIFO_PRI_0               0	/*Highest */
#define TX_FIFO_PRI_1               1
#define TX_FIFO_PRI_2               2
#define TX_FIFO_PRI_3               3
#define TX_FIFO_PRI_4               4
#define TX_FIFO_PRI_5               5
#define TX_FIFO_PRI_6               6
#define TX_FIFO_PRI_7               7	/*lowest */
	u8 fifo_priority;	/* specifies pointer level for FIFO */
	/* user should not set twos fifos with same pri */
	u8 f_no_snoop;
#define NO_SNOOP_TXD                0x01
#define NO_SNOOP_TXD_BUFFER          0x02
} tx_fifo_config_t;


/* Maintains per Ring related information */
typedef struct rx_ring_config {
	u32 num_rxd;		/*No of RxDs per Rx Ring */
#define RX_RING_PRI_0               0	/* highest */
#define RX_RING_PRI_1               1
#define RX_RING_PRI_2               2
#define RX_RING_PRI_3               3
#define RX_RING_PRI_4               4
#define RX_RING_PRI_5               5
#define RX_RING_PRI_6               6
#define RX_RING_PRI_7               7	/* lowest */

	u8 ring_priority;	/*Specifies service priority of ring */
	/* OSM should not set any two rings with same priority */
	u8 ring_org;		/*Organization of ring */
#define RING_ORG_BUFF1		0x01
#define RX_RING_ORG_BUFF3	0x03
#define RX_RING_ORG_BUFF5	0x05

	u8 f_no_snoop;
#define NO_SNOOP_RXD                0x01
#define NO_SNOOP_RXD_BUFFER         0x02
} rx_ring_config_t;

/* This structure provides contains values of the tunable parameters
 * of the H/W
 */
struct config_param {
/* Tx Side */
	u32 tx_fifo_num;	/*Number of Tx FIFOs */

	u8 fifo_mapping[MAX_TX_FIFOS];
	tx_fifo_config_t tx_cfg[MAX_TX_FIFOS];	/*Per-Tx FIFO config */
	u32 max_txds;		/*Max no. of Tx buffer descriptor per TxDL */
	u64 tx_intr_type;
	/* Specifies if Tx Intr is UTILZ or PER_LIST type. */

/* Rx Side */
	u32 rx_ring_num;	/*Number of receive rings */
#define MAX_RX_BLOCKS_PER_RING  150

	rx_ring_config_t rx_cfg[MAX_RX_RINGS];	/*Per-Rx Ring config */

#define HEADER_ETHERNET_II_802_3_SIZE 14
#define HEADER_802_2_SIZE              3
#define HEADER_SNAP_SIZE               5
#define HEADER_VLAN_SIZE               4

#define MIN_MTU                       46
#define MAX_PYLD                    1500
#define MAX_MTU                     (MAX_PYLD+18)
#define MAX_MTU_VLAN                (MAX_PYLD+22)
#define MAX_PYLD_JUMBO              9600
#define MAX_MTU_JUMBO               (MAX_PYLD_JUMBO+18)
#define MAX_MTU_JUMBO_VLAN          (MAX_PYLD_JUMBO+22)
	u16 bus_speed;
};

/* Structure representing MAC Addrs */
typedef struct mac_addr {
	u8 mac_addr[ETH_ALEN];
} macaddr_t;

/* Structure that represent every FIFO element in the BAR1
 * Address location.
 */
typedef struct _TxFIFO_element {
	u64 TxDL_Pointer;

	u64 List_Control;
#define TX_FIFO_LAST_TXD_NUM( val)     vBIT(val,0,8)
#define TX_FIFO_FIRST_LIST             BIT(14)
#define TX_FIFO_LAST_LIST              BIT(15)
#define TX_FIFO_FIRSTNLAST_LIST        vBIT(3,14,2)
#define TX_FIFO_SPECIAL_FUNC           BIT(23)
#define TX_FIFO_DS_NO_SNOOP            BIT(31)
#define TX_FIFO_BUFF_NO_SNOOP          BIT(30)
} TxFIFO_element_t;

/* Tx descriptor structure */
typedef struct _TxD {
	u64 Control_1;
/* bit mask */
#define TXD_LIST_OWN_XENA       BIT(7)
#define TXD_T_CODE              (BIT(12)|BIT(13)|BIT(14)|BIT(15))
#define TXD_T_CODE_OK(val)      (|(val & TXD_T_CODE))
#define GET_TXD_T_CODE(val)     ((val & TXD_T_CODE)<<12)
#define TXD_GATHER_CODE         (BIT(22) | BIT(23))
#define TXD_GATHER_CODE_FIRST   BIT(22)
#define TXD_GATHER_CODE_LAST    BIT(23)
#define TXD_TCP_LSO_EN          BIT(30)
#define TXD_UDP_COF_EN          BIT(31)
#define TXD_TCP_LSO_MSS(val)    vBIT(val,34,14)
#define TXD_BUFFER0_SIZE(val)   vBIT(val,48,16)

	u64 Control_2;
#define TXD_TX_CKO_CONTROL      (BIT(5)|BIT(6)|BIT(7))
#define TXD_TX_CKO_IPV4_EN      BIT(5)
#define TXD_TX_CKO_TCP_EN       BIT(6)
#define TXD_TX_CKO_UDP_EN       BIT(7)
#define TXD_VLAN_ENABLE         BIT(15)
#define TXD_VLAN_TAG(val)       vBIT(val,16,16)
#define TXD_INT_NUMBER(val)     vBIT(val,34,6)
#define TXD_INT_TYPE_PER_LIST   BIT(47)
#define TXD_INT_TYPE_UTILZ      BIT(46)
#define TXD_SET_MARKER         vBIT(0x6,0,4)

	u64 Buffer_Pointer;
	u64 Host_Control;	/* reserved for host */
} TxD_t;

/* Structure to hold the phy and virt addr of every TxDL. */
typedef struct list_info_hold {
	dma_addr_t list_phy_addr;
	void *list_virt_addr;
} list_info_hold_t;

/* Rx descriptor structure */
typedef struct _RxD_t {
	u64 Host_Control;	/* reserved for host */
	u64 Control_1;
#define RXD_OWN_XENA            BIT(7)
#define RXD_T_CODE              (BIT(12)|BIT(13)|BIT(14)|BIT(15))
#define RXD_FRAME_PROTO         vBIT(0xFFFF,24,8)
#define RXD_FRAME_PROTO_IPV4    BIT(27)
#define RXD_FRAME_PROTO_IPV6    BIT(28)
#define RXD_FRAME_IP_FRAG	BIT(29)
#define RXD_FRAME_PROTO_TCP     BIT(30)
#define RXD_FRAME_PROTO_UDP     BIT(31)
#define TCP_OR_UDP_FRAME        (RXD_FRAME_PROTO_TCP | RXD_FRAME_PROTO_UDP)
#define RXD_GET_L3_CKSUM(val)   ((u16)(val>> 16) & 0xFFFF)
#define RXD_GET_L4_CKSUM(val)   ((u16)(val) & 0xFFFF)

	u64 Control_2;
#define	THE_RXD_MARK		0x3
#define	SET_RXD_MARKER		vBIT(THE_RXD_MARK, 0, 2)
#define	GET_RXD_MARKER(ctrl)	((ctrl & SET_RXD_MARKER) >> 62)

#ifndef CONFIG_2BUFF_MODE
#define MASK_BUFFER0_SIZE       vBIT(0x3FFF,2,14)
#define SET_BUFFER0_SIZE(val)   vBIT(val,2,14)
#else
#define MASK_BUFFER0_SIZE       vBIT(0xFF,2,14)
#define MASK_BUFFER1_SIZE       vBIT(0xFFFF,16,16)
#define MASK_BUFFER2_SIZE       vBIT(0xFFFF,32,16)
#define SET_BUFFER0_SIZE(val)   vBIT(val,8,8)
#define SET_BUFFER1_SIZE(val)   vBIT(val,16,16)
#define SET_BUFFER2_SIZE(val)   vBIT(val,32,16)
#endif

#define MASK_VLAN_TAG           vBIT(0xFFFF,48,16)
#define SET_VLAN_TAG(val)       vBIT(val,48,16)
#define SET_NUM_TAG(val)       vBIT(val,16,32)

#ifndef CONFIG_2BUFF_MODE
#define RXD_GET_BUFFER0_SIZE(Control_2) (u64)((Control_2 & vBIT(0x3FFF,2,14)))
#else
#define RXD_GET_BUFFER0_SIZE(Control_2) (u8)((Control_2 & MASK_BUFFER0_SIZE) \
							>> 48)
#define RXD_GET_BUFFER1_SIZE(Control_2) (u16)((Control_2 & MASK_BUFFER1_SIZE) \
							>> 32)
#define RXD_GET_BUFFER2_SIZE(Control_2) (u16)((Control_2 & MASK_BUFFER2_SIZE) \
							>> 16)
#define BUF0_LEN	40
#define BUF1_LEN	1
#endif

	u64 Buffer0_ptr;
#ifdef CONFIG_2BUFF_MODE
	u64 Buffer1_ptr;
	u64 Buffer2_ptr;
#endif
} RxD_t;

/* Structure that represents the Rx descriptor block which contains
 * 128 Rx descriptors.
 */
#ifndef CONFIG_2BUFF_MODE
typedef struct _RxD_block {
#define MAX_RXDS_PER_BLOCK             127
	RxD_t rxd[MAX_RXDS_PER_BLOCK];

	u64 reserved_0;
#define END_OF_BLOCK    0xFEFFFFFFFFFFFFFFULL
	u64 reserved_1;		/* 0xFEFFFFFFFFFFFFFF to mark last
				 * Rxd in this blk */
	u64 reserved_2_pNext_RxD_block;	/* Logical ptr to next */
	u64 pNext_RxD_Blk_physical;	/* Buff0_ptr.In a 32 bit arch
					 * the upper 32 bits should
					 * be 0 */
} RxD_block_t;
#else
typedef struct _RxD_block {
#define MAX_RXDS_PER_BLOCK             85
	RxD_t rxd[MAX_RXDS_PER_BLOCK];

#define END_OF_BLOCK    0xFEFFFFFFFFFFFFFFULL
	u64 reserved_1;		/* 0xFEFFFFFFFFFFFFFF to mark last Rxd
				 * in this blk */
	u64 pNext_RxD_Blk_physical;	/* Phy ponter to next blk. */
} RxD_block_t;
#define SIZE_OF_BLOCK	4096

/* Structure to hold virtual addresses of Buf0 and Buf1 in
 * 2buf mode. */
typedef struct bufAdd {
	void *ba_0_org;
	void *ba_1_org;
	void *ba_0;
	void *ba_1;
} buffAdd_t;
#endif

/* Structure which stores all the MAC control parameters */

/* This structure stores the offset of the RxD in the ring
 * from which the Rx Interrupt processor can start picking
 * up the RxDs for processing.
 */
typedef struct _rx_curr_get_info_t {
	u32 block_index;
	u32 offset;
	u32 ring_len;
} rx_curr_get_info_t;

typedef rx_curr_get_info_t rx_curr_put_info_t;

/* This structure stores the offset of the TxDl in the FIFO
 * from which the Tx Interrupt processor can start picking
 * up the TxDLs for send complete interrupt processing.
 */
typedef struct {
	u32 offset;
	u32 fifo_len;
} tx_curr_get_info_t;

typedef tx_curr_get_info_t tx_curr_put_info_t;

/* Structure that holds the Phy and virt addresses of the Blocks */
typedef struct rx_block_info {
	RxD_t *block_virt_addr;
	dma_addr_t block_dma_addr;
} rx_block_info_t;

/* pre declaration of the nic structure */
typedef struct s2io_nic nic_t;

/* Ring specific structure */
typedef struct ring_info {
	/* The ring number */
	int ring_no;

	/*
	 *  Place holders for the virtual and physical addresses of
	 *  all the Rx Blocks
	 */
	rx_block_info_t rx_blocks[MAX_RX_BLOCKS_PER_RING];
	int block_count;
	int pkt_cnt;

	/*
	 * Put pointer info which indictes which RxD has to be replenished
	 * with a new buffer.
	 */
	rx_curr_put_info_t rx_curr_put_info;

	/*
	 * Get pointer info which indictes which is the last RxD that was
	 * processed by the driver.
	 */
	rx_curr_get_info_t rx_curr_get_info;

#ifndef CONFIG_S2IO_NAPI
	/* Index to the absolute position of the put pointer of Rx ring */
	int put_pos;
#endif

#ifdef CONFIG_2BUFF_MODE
	/* Buffer Address store. */
	buffAdd_t **ba;
#endif
	nic_t *nic;
} ring_info_t;

/* Fifo specific structure */
typedef struct fifo_info {
	/* FIFO number */
	int fifo_no;

	/* Maximum TxDs per TxDL */
	int max_txds;

	/* Place holder of all the TX List's Phy and Virt addresses. */
	list_info_hold_t *list_info;

	/*
	 * Current offset within the tx FIFO where driver would write
	 * new Tx frame
	 */
	tx_curr_put_info_t tx_curr_put_info;

	/*
	 * Current offset within tx FIFO from where the driver would start freeing
	 * the buffers
	 */
	tx_curr_get_info_t tx_curr_get_info;

	nic_t *nic;
}fifo_info_t;

/* Infomation related to the Tx and Rx FIFOs and Rings of Xena
 * is maintained in this structure.
 */
typedef struct mac_info {
/* tx side stuff */
	/* logical pointer of start of each Tx FIFO */
	TxFIFO_element_t __iomem *tx_FIFO_start[MAX_TX_FIFOS];

	/* Fifo specific structure */
	fifo_info_t fifos[MAX_TX_FIFOS];

/* rx side stuff */
	/* Ring specific structure */
	ring_info_t rings[MAX_RX_RINGS];

	u16 rmac_pause_time;
	u16 mc_pause_threshold_q0q3;
	u16 mc_pause_threshold_q4q7;

	void *stats_mem;	/* orignal pointer to allocated mem */
	dma_addr_t stats_mem_phy;	/* Physical address of the stat block */
	u32 stats_mem_sz;
	StatInfo_t *stats_info;	/* Logical address of the stat block */
} mac_info_t;

/* structure representing the user defined MAC addresses */
typedef struct {
	char addr[ETH_ALEN];
	int usage_cnt;
} usr_addr_t;

/* Default Tunable parameters of the NIC. */
#define DEFAULT_FIFO_LEN 4096
#define SMALL_RXD_CNT	30 * (MAX_RXDS_PER_BLOCK+1)
#define LARGE_RXD_CNT	100 * (MAX_RXDS_PER_BLOCK+1)
#define SMALL_BLK_CNT	30
#define LARGE_BLK_CNT	100

/* Structure representing one instance of the NIC */
struct s2io_nic {
#ifdef CONFIG_S2IO_NAPI
	/*
	 * Count of packets to be processed in a given iteration, it will be indicated
	 * by the quota field of the device structure when NAPI is enabled.
	 */
	int pkts_to_process;
#endif
	struct net_device *dev;
	mac_info_t mac_control;
	struct config_param config;
	struct pci_dev *pdev;
	void __iomem *bar0;
	void __iomem *bar1;
#define MAX_MAC_SUPPORTED   16
#define MAX_SUPPORTED_MULTICASTS MAX_MAC_SUPPORTED

	macaddr_t def_mac_addr[MAX_MAC_SUPPORTED];
	macaddr_t pre_mac_addr[MAX_MAC_SUPPORTED];

	struct net_device_stats stats;
	int high_dma_flag;
	int device_close_flag;
	int device_enabled_once;

	char name[50];
	struct tasklet_struct task;
	volatile unsigned long tasklet_status;

	/* Timer that handles I/O errors/exceptions */
	struct timer_list alarm_timer;

	/* Space to back up the PCI config space */
	u32 config_space[256 / sizeof(u32)];

	atomic_t rx_bufs_left[MAX_RX_RINGS];

	spinlock_t tx_lock;
#ifndef CONFIG_S2IO_NAPI
	spinlock_t put_lock;
#endif

#define PROMISC     1
#define ALL_MULTI   2

#define MAX_ADDRS_SUPPORTED 64
	u16 usr_addr_count;
	u16 mc_addr_count;
	usr_addr_t usr_addrs[MAX_ADDRS_SUPPORTED];

	u16 m_cast_flg;
	u16 all_multi_pos;
	u16 promisc_flg;

	u16 tx_pkt_count;
	u16 rx_pkt_count;
	u16 tx_err_count;
	u16 rx_err_count;

	/*  Id timer, used to blink NIC to physically identify NIC. */
	struct timer_list id_timer;

	/*  Restart timer, used to restart NIC if the device is stuck and
	 *  a schedule task that will set the correct Link state once the
	 *  NIC's PHY has stabilized after a state change.
	 */
#ifdef INIT_TQUEUE
	struct tq_struct rst_timer_task;
	struct tq_struct set_link_task;
#else
	struct work_struct rst_timer_task;
	struct work_struct set_link_task;
#endif

	/* Flag that can be used to turn on or turn off the Rx checksum
	 * offload feature.
	 */
	int rx_csum;

	/*  after blink, the adapter must be restored with original
	 *  values.
	 */
	u64 adapt_ctrl_org;

	/* Last known link state. */
	u16 last_link_state;
#define	LINK_DOWN	1
#define	LINK_UP		2

	int task_flag;
#define CARD_DOWN 1
#define CARD_UP 2
	atomic_t card_state;
	volatile unsigned long link_state;
	struct vlan_group *vlgrp;
#define XFRAME_I_DEVICE		1
#define XFRAME_II_DEVICE	2
	u8 device_type;

	spinlock_t	rx_lock;
	atomic_t	isr_cnt;
};

#define RESET_ERROR 1;
#define CMD_ERROR   2;

/*  OS related system calls */
#ifndef readq
static inline u64 readq(void __iomem *addr)
{
	u64 ret = 0;
	ret = readl(addr + 4);
	(u64) ret <<= 32;
	(u64) ret |= readl(addr);

	return ret;
}
#endif

#ifndef writeq
static inline void writeq(u64 val, void __iomem *addr)
{
	writel((u32) (val), addr);
	writel((u32) (val >> 32), (addr + 4));
}

/* In 32 bit modes, some registers have to be written in a
 * particular order to expect correct hardware operation. The
 * macro SPECIAL_REG_WRITE is used to perform such ordered
 * writes. Defines UF (Upper First) and LF (Lower First) will
 * be used to specify the required write order.
 */
#define UF	1
#define LF	2
static inline void SPECIAL_REG_WRITE(u64 val, void __iomem *addr, int order)
{
	if (order == LF) {
		writel((u32) (val), addr);
		writel((u32) (val >> 32), (addr + 4));
	} else {
		writel((u32) (val >> 32), (addr + 4));
		writel((u32) (val), addr);
	}
}
#else
#define SPECIAL_REG_WRITE(val, addr, dummy) writeq(val, addr)
#endif

/*  Interrupt related values of Xena */

#define ENABLE_INTRS    1
#define DISABLE_INTRS   2

/*  Highest level interrupt blocks */
#define TX_PIC_INTR     (0x0001<<0)
#define TX_DMA_INTR     (0x0001<<1)
#define TX_MAC_INTR     (0x0001<<2)
#define TX_XGXS_INTR    (0x0001<<3)
#define TX_TRAFFIC_INTR (0x0001<<4)
#define RX_PIC_INTR     (0x0001<<5)
#define RX_DMA_INTR     (0x0001<<6)
#define RX_MAC_INTR     (0x0001<<7)
#define RX_XGXS_INTR    (0x0001<<8)
#define RX_TRAFFIC_INTR (0x0001<<9)
#define MC_INTR         (0x0001<<10)
#define ENA_ALL_INTRS    (   TX_PIC_INTR     | \
                            TX_DMA_INTR     | \
                            TX_MAC_INTR     | \
                            TX_XGXS_INTR    | \
                            TX_TRAFFIC_INTR | \
                            RX_PIC_INTR     | \
                            RX_DMA_INTR     | \
                            RX_MAC_INTR     | \
                            RX_XGXS_INTR    | \
                            RX_TRAFFIC_INTR | \
                            MC_INTR )

/*  Interrupt masks for the general interrupt mask register */
#define DISABLE_ALL_INTRS   0xFFFFFFFFFFFFFFFFULL

#define TXPIC_INT_M         BIT(0)
#define TXDMA_INT_M         BIT(1)
#define TXMAC_INT_M         BIT(2)
#define TXXGXS_INT_M        BIT(3)
#define TXTRAFFIC_INT_M     BIT(8)
#define PIC_RX_INT_M        BIT(32)
#define RXDMA_INT_M         BIT(33)
#define RXMAC_INT_M         BIT(34)
#define MC_INT_M            BIT(35)
#define RXXGXS_INT_M        BIT(36)
#define RXTRAFFIC_INT_M     BIT(40)

/*  PIC level Interrupts TODO*/

/*  DMA level Inressupts */
#define TXDMA_PFC_INT_M     BIT(0)
#define TXDMA_PCC_INT_M     BIT(2)

/*  PFC block interrupts */
#define PFC_MISC_ERR_1      BIT(0)	/* Interrupt to indicate FIFO full */

/* PCC block interrupts. */
#define	PCC_FB_ECC_ERR	   vBIT(0xff, 16, 8)	/* Interrupt to indicate
						   PCC_FB_ECC Error. */

#define RXD_GET_VLAN_TAG(Control_2) (u16)(Control_2 & MASK_VLAN_TAG)
/*
 * Prototype declaration.
 */
static int __devinit s2io_init_nic(struct pci_dev *pdev,
				   const struct pci_device_id *pre);
static void __devexit s2io_rem_nic(struct pci_dev *pdev);
static int init_shared_mem(struct s2io_nic *sp);
static void free_shared_mem(struct s2io_nic *sp);
static int init_nic(struct s2io_nic *nic);
static void rx_intr_handler(ring_info_t *ring_data);
static void tx_intr_handler(fifo_info_t *fifo_data);
static void alarm_intr_handler(struct s2io_nic *sp);

static int s2io_starter(void);
void s2io_closer(void);
static void s2io_tx_watchdog(struct net_device *dev);
static void s2io_tasklet(unsigned long dev_addr);
static void s2io_set_multicast(struct net_device *dev);
static int rx_osm_handler(ring_info_t *ring_data, RxD_t * rxdp);
void s2io_link(nic_t * sp, int link);
void s2io_reset(nic_t * sp);
#if defined(CONFIG_S2IO_NAPI)
static int s2io_poll(struct net_device *dev, int *budget);
#endif
static void s2io_init_pci(nic_t * sp);
int s2io_set_mac_addr(struct net_device *dev, u8 * addr);
static void s2io_alarm_handle(unsigned long data);
static irqreturn_t s2io_isr(int irq, void *dev_id, struct pt_regs *regs);
static int verify_xena_quiescence(nic_t *sp, u64 val64, int flag);
static struct ethtool_ops netdev_ethtool_ops;
static void s2io_set_link(unsigned long data);
int s2io_set_swapper(nic_t * sp);
static void s2io_card_down(nic_t *nic);
static int s2io_card_up(nic_t *nic);
int get_xena_rev_id(struct pci_dev *pdev);
#endif				/* _S2IO_H */