summaryrefslogtreecommitdiff
path: root/drivers/s390/net/qeth_core.h
blob: 04e294d1d16d7ea68f8c9aea0d2f56bc5cb6ec11 (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
/* SPDX-License-Identifier: GPL-2.0 */
/*
 *    Copyright IBM Corp. 2007
 *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
 *		 Frank Pavlic <fpavlic@de.ibm.com>,
 *		 Thomas Spatzier <tspat@de.ibm.com>,
 *		 Frank Blaschka <frank.blaschka@de.ibm.com>
 */

#ifndef __QETH_CORE_H__
#define __QETH_CORE_H__

#include <linux/if.h>
#include <linux/if_arp.h>
#include <linux/etherdevice.h>
#include <linux/if_vlan.h>
#include <linux/ctype.h>
#include <linux/in6.h>
#include <linux/bitops.h>
#include <linux/seq_file.h>
#include <linux/ethtool.h>
#include <linux/hashtable.h>
#include <linux/ip.h>
#include <linux/refcount.h>

#include <net/ipv6.h>
#include <net/if_inet6.h>
#include <net/addrconf.h>
#include <net/tcp.h>

#include <asm/debug.h>
#include <asm/qdio.h>
#include <asm/ccwdev.h>
#include <asm/ccwgroup.h>
#include <asm/sysinfo.h>

#include "qeth_core_mpc.h"

/**
 * Debug Facility stuff
 */
enum qeth_dbf_names {
	QETH_DBF_SETUP,
	QETH_DBF_MSG,
	QETH_DBF_CTRL,
	QETH_DBF_INFOS	/* must be last element */
};

struct qeth_dbf_info {
	char name[DEBUG_MAX_NAME_LEN];
	int pages;
	int areas;
	int len;
	int level;
	struct debug_view *view;
	debug_info_t *id;
};

#define QETH_DBF_CTRL_LEN 256

#define QETH_DBF_TEXT(name, level, text) \
	debug_text_event(qeth_dbf[QETH_DBF_##name].id, level, text)

#define QETH_DBF_HEX(name, level, addr, len) \
	debug_event(qeth_dbf[QETH_DBF_##name].id, level, (void *)(addr), len)

#define QETH_DBF_MESSAGE(level, text...) \
	debug_sprintf_event(qeth_dbf[QETH_DBF_MSG].id, level, text)

#define QETH_DBF_TEXT_(name, level, text...) \
	qeth_dbf_longtext(qeth_dbf[QETH_DBF_##name].id, level, text)

#define QETH_CARD_TEXT(card, level, text) \
	debug_text_event(card->debug, level, text)

#define QETH_CARD_HEX(card, level, addr, len) \
	debug_event(card->debug, level, (void *)(addr), len)

#define QETH_CARD_MESSAGE(card, text...) \
	debug_sprintf_event(card->debug, level, text)

#define QETH_CARD_TEXT_(card, level, text...) \
	qeth_dbf_longtext(card->debug, level, text)

#define SENSE_COMMAND_REJECT_BYTE 0
#define SENSE_COMMAND_REJECT_FLAG 0x80
#define SENSE_RESETTING_EVENT_BYTE 1
#define SENSE_RESETTING_EVENT_FLAG 0x80

static inline u32 qeth_get_device_id(struct ccw_device *cdev)
{
	struct ccw_dev_id dev_id;
	u32 id;

	ccw_device_get_id(cdev, &dev_id);
	id = dev_id.devno;
	id |= (u32) (dev_id.ssid << 16);

	return id;
}

/*
 * Common IO related definitions
 */
#define CARD_RDEV(card) card->read.ccwdev
#define CARD_WDEV(card) card->write.ccwdev
#define CARD_DDEV(card) card->data.ccwdev
#define CARD_BUS_ID(card) dev_name(&card->gdev->dev)
#define CARD_RDEV_ID(card) dev_name(&card->read.ccwdev->dev)
#define CARD_WDEV_ID(card) dev_name(&card->write.ccwdev->dev)
#define CARD_DDEV_ID(card) dev_name(&card->data.ccwdev->dev)
#define CCW_DEVID(cdev)		(qeth_get_device_id(cdev))
#define CARD_DEVID(card)	(CCW_DEVID(CARD_RDEV(card)))

/**
 * card stuff
 */
struct qeth_perf_stats {
	unsigned int bufs_rec;
	unsigned int bufs_sent;
	unsigned int buf_elements_sent;

	unsigned int skbs_sent_pack;
	unsigned int bufs_sent_pack;

	unsigned int sc_dp_p;
	unsigned int sc_p_dp;
	/* qdio_cq_handler: number of times called, time spent in */
	__u64 cq_start_time;
	unsigned int cq_cnt;
	unsigned int cq_time;
	/* qdio_input_handler: number of times called, time spent in */
	__u64 inbound_start_time;
	unsigned int inbound_cnt;
	unsigned int inbound_time;
	/* qeth_send_packet: number of times called, time spent in */
	__u64 outbound_start_time;
	unsigned int outbound_cnt;
	unsigned int outbound_time;
	/* qdio_output_handler: number of times called, time spent in */
	__u64 outbound_handler_start_time;
	unsigned int outbound_handler_cnt;
	unsigned int outbound_handler_time;
	/* number of calls to and time spent in do_QDIO for inbound queue */
	__u64 inbound_do_qdio_start_time;
	unsigned int inbound_do_qdio_cnt;
	unsigned int inbound_do_qdio_time;
	/* number of calls to and time spent in do_QDIO for outbound queues */
	__u64 outbound_do_qdio_start_time;
	unsigned int outbound_do_qdio_cnt;
	unsigned int outbound_do_qdio_time;
	unsigned int large_send_bytes;
	unsigned int large_send_cnt;
	unsigned int sg_skbs_sent;
	/* initial values when measuring starts */
	unsigned long initial_rx_packets;
	unsigned long initial_tx_packets;
	/* inbound scatter gather data */
	unsigned int sg_skbs_rx;
	unsigned int sg_frags_rx;
	unsigned int sg_alloc_page_rx;
	unsigned int tx_csum;
	unsigned int tx_lin;
	unsigned int tx_linfail;
	unsigned int rx_csum;
};

/* Routing stuff */
struct qeth_routing_info {
	enum qeth_routing_types type;
};

/* IPA stuff */
struct qeth_ipa_info {
	__u32 supported_funcs;
	__u32 enabled_funcs;
};

/* SETBRIDGEPORT stuff */
enum qeth_sbp_roles {
	QETH_SBP_ROLE_NONE	= 0,
	QETH_SBP_ROLE_PRIMARY	= 1,
	QETH_SBP_ROLE_SECONDARY	= 2,
};

enum qeth_sbp_states {
	QETH_SBP_STATE_INACTIVE	= 0,
	QETH_SBP_STATE_STANDBY	= 1,
	QETH_SBP_STATE_ACTIVE	= 2,
};

#define QETH_SBP_HOST_NOTIFICATION 1

struct qeth_sbp_info {
	__u32 supported_funcs;
	enum qeth_sbp_roles role;
	__u32 hostnotification:1;
	__u32 reflect_promisc:1;
	__u32 reflect_promisc_primary:1;
};

struct qeth_vnicc_info {
	/* supported/currently configured VNICCs; updated in IPA exchanges */
	u32 sup_chars;
	u32 cur_chars;
	/* supported commands: bitmasks which VNICCs support respective cmd */
	u32 set_char_sup;
	u32 getset_timeout_sup;
	/* timeout value for the learning characteristic */
	u32 learning_timeout;
	/* characteristics wanted/configured by user */
	u32 wanted_chars;
	/* has user explicitly enabled rx_bcast while online? */
	bool rx_bcast_enabled;
};

static inline int qeth_is_ipa_supported(struct qeth_ipa_info *ipa,
		enum qeth_ipa_funcs func)
{
	return (ipa->supported_funcs & func);
}

static inline int qeth_is_ipa_enabled(struct qeth_ipa_info *ipa,
		enum qeth_ipa_funcs func)
{
	return (ipa->supported_funcs & ipa->enabled_funcs & func);
}

#define qeth_adp_supported(c, f) \
	qeth_is_ipa_supported(&c->options.adp, f)
#define qeth_adp_enabled(c, f) \
	qeth_is_ipa_enabled(&c->options.adp, f)
#define qeth_is_supported(c, f) \
	qeth_is_ipa_supported(&c->options.ipa4, f)
#define qeth_is_enabled(c, f) \
	qeth_is_ipa_enabled(&c->options.ipa4, f)
#define qeth_is_supported6(c, f) \
	qeth_is_ipa_supported(&c->options.ipa6, f)
#define qeth_is_enabled6(c, f) \
	qeth_is_ipa_enabled(&c->options.ipa6, f)
#define qeth_is_ipafunc_supported(c, prot, f) \
	 ((prot == QETH_PROT_IPV6) ? \
		qeth_is_supported6(c, f) : qeth_is_supported(c, f))
#define qeth_is_ipafunc_enabled(c, prot, f) \
	 ((prot == QETH_PROT_IPV6) ? \
		qeth_is_enabled6(c, f) : qeth_is_enabled(c, f))

#define QETH_IDX_FUNC_LEVEL_OSD		 0x0101
#define QETH_IDX_FUNC_LEVEL_IQD		 0x4108

#define QETH_BUFSIZE		4096
#define CCW_CMD_WRITE		0x01
#define CCW_CMD_READ		0x02

/**
 * some more defs
 */
#define QETH_TX_TIMEOUT		100 * HZ
#define QETH_RCD_TIMEOUT	60 * HZ
#define QETH_RECLAIM_WORK_TIME	HZ
#define QETH_MAX_PORTNO		15

/*IPv6 address autoconfiguration stuff*/
#define UNIQUE_ID_IF_CREATE_ADDR_FAILED 0xfffe
#define UNIQUE_ID_NOT_BY_CARD		0x10000

/*****************************************************************************/
/* QDIO queue and buffer handling                                            */
/*****************************************************************************/
#define QETH_MAX_QUEUES 4
#define QETH_IN_BUF_SIZE_DEFAULT 65536
#define QETH_IN_BUF_COUNT_DEFAULT 64
#define QETH_IN_BUF_COUNT_HSDEFAULT 128
#define QETH_IN_BUF_COUNT_MIN 8
#define QETH_IN_BUF_COUNT_MAX 128
#define QETH_MAX_BUFFER_ELEMENTS(card) ((card)->qdio.in_buf_size >> 12)
#define QETH_IN_BUF_REQUEUE_THRESHOLD(card) \
		 ((card)->qdio.in_buf_pool.buf_count / 2)

/* buffers we have to be behind before we get a PCI */
#define QETH_PCI_THRESHOLD_A(card) ((card)->qdio.in_buf_pool.buf_count+1)
/*enqueued free buffers left before we get a PCI*/
#define QETH_PCI_THRESHOLD_B(card) 0
/*not used unless the microcode gets patched*/
#define QETH_PCI_TIMER_VALUE(card) 3

/* priority queing */
#define QETH_PRIOQ_DEFAULT QETH_NO_PRIO_QUEUEING
#define QETH_DEFAULT_QUEUE    2
#define QETH_NO_PRIO_QUEUEING 0
#define QETH_PRIO_Q_ING_PREC  1
#define QETH_PRIO_Q_ING_TOS   2
#define QETH_PRIO_Q_ING_SKB   3
#define QETH_PRIO_Q_ING_VLAN  4

/* Packing */
#define QETH_LOW_WATERMARK_PACK  2
#define QETH_HIGH_WATERMARK_PACK 5
#define QETH_WATERMARK_PACK_FUZZ 1

/* large receive scatter gather copy break */
#define QETH_RX_SG_CB (PAGE_SIZE >> 1)
#define QETH_RX_PULL_LEN 256

struct qeth_hdr_layer3 {
	__u8  id;
	__u8  flags;
	__u16 inbound_checksum; /*TSO:__u16 seqno */
	__u32 token;		/*TSO: __u32 reserved */
	__u16 length;
	__u8  vlan_prio;
	__u8  ext_flags;
	__u16 vlan_id;
	__u16 frame_offset;
	union {
		/* TX: */
		u8 ipv6_addr[16];
		struct ipv4 {
			u8 res[12];
			u32 addr;
		} ipv4;
		/* RX: */
		struct rx {
			u8 res1[2];
			u8 src_mac[6];
			u8 res2[4];
			u16 vlan_id;
			u8 res3[2];
		} rx;
	} next_hop;
};

struct qeth_hdr_layer2 {
	__u8 id;
	__u8 flags[3];
	__u8 port_no;
	__u8 hdr_length;
	__u16 pkt_length;
	__u16 seq_no;
	__u16 vlan_id;
	__u32 reserved;
	__u8 reserved2[16];
} __attribute__ ((packed));

struct qeth_hdr_osn {
	__u8 id;
	__u8 reserved;
	__u16 seq_no;
	__u16 reserved2;
	__u16 control_flags;
	__u16 pdu_length;
	__u8 reserved3[18];
	__u32 ccid;
} __attribute__ ((packed));

struct qeth_hdr {
	union {
		struct qeth_hdr_layer2 l2;
		struct qeth_hdr_layer3 l3;
		struct qeth_hdr_osn    osn;
	} hdr;
} __attribute__ ((packed));

/*TCP Segmentation Offload header*/
struct qeth_hdr_ext_tso {
	__u16 hdr_tot_len;
	__u8  imb_hdr_no;
	__u8  reserved;
	__u8  hdr_type;
	__u8  hdr_version;
	__u16 hdr_len;
	__u32 payload_len;
	__u16 mss;
	__u16 dg_hdr_len;
	__u8  padding[16];
} __attribute__ ((packed));

struct qeth_hdr_tso {
	struct qeth_hdr hdr;	/*hdr->hdr.l3.xxx*/
	struct qeth_hdr_ext_tso ext;
} __attribute__ ((packed));


/* flags for qeth_hdr.flags */
#define QETH_HDR_PASSTHRU 0x10
#define QETH_HDR_IPV6     0x80
#define QETH_HDR_CAST_MASK 0x07
enum qeth_cast_flags {
	QETH_CAST_UNICAST   = 0x06,
	QETH_CAST_MULTICAST = 0x04,
	QETH_CAST_BROADCAST = 0x05,
	QETH_CAST_ANYCAST   = 0x07,
	QETH_CAST_NOCAST    = 0x00,
};

enum qeth_layer2_frame_flags {
	QETH_LAYER2_FLAG_MULTICAST = 0x01,
	QETH_LAYER2_FLAG_BROADCAST = 0x02,
	QETH_LAYER2_FLAG_UNICAST   = 0x04,
	QETH_LAYER2_FLAG_VLAN      = 0x10,
};

enum qeth_header_ids {
	QETH_HEADER_TYPE_LAYER3 = 0x01,
	QETH_HEADER_TYPE_LAYER2 = 0x02,
	QETH_HEADER_TYPE_L3_TSO	= 0x03,
	QETH_HEADER_TYPE_OSN    = 0x04,
	QETH_HEADER_TYPE_L2_TSO	= 0x06,
};
/* flags for qeth_hdr.ext_flags */
#define QETH_HDR_EXT_VLAN_FRAME       0x01
#define QETH_HDR_EXT_TOKEN_ID         0x02
#define QETH_HDR_EXT_INCLUDE_VLAN_TAG 0x04
#define QETH_HDR_EXT_SRC_MAC_ADDR     0x08
#define QETH_HDR_EXT_CSUM_HDR_REQ     0x10
#define QETH_HDR_EXT_CSUM_TRANSP_REQ  0x20
#define QETH_HDR_EXT_UDP	      0x40 /*bit off for TCP*/

enum qeth_qdio_buffer_states {
	/*
	 * inbound: read out by driver; owned by hardware in order to be filled
	 * outbound: owned by driver in order to be filled
	 */
	QETH_QDIO_BUF_EMPTY,
	/*
	 * inbound: filled by hardware; owned by driver in order to be read out
	 * outbound: filled by driver; owned by hardware in order to be sent
	 */
	QETH_QDIO_BUF_PRIMED,
	/*
	 * inbound: not applicable
	 * outbound: identified to be pending in TPQ
	 */
	QETH_QDIO_BUF_PENDING,
	/*
	 * inbound: not applicable
	 * outbound: found in completion queue
	 */
	QETH_QDIO_BUF_IN_CQ,
	/*
	 * inbound: not applicable
	 * outbound: handled via transfer pending / completion queue
	 */
	QETH_QDIO_BUF_HANDLED_DELAYED,
};

enum qeth_qdio_info_states {
	QETH_QDIO_UNINITIALIZED,
	QETH_QDIO_ALLOCATED,
	QETH_QDIO_ESTABLISHED,
	QETH_QDIO_CLEANING
};

struct qeth_buffer_pool_entry {
	struct list_head list;
	struct list_head init_list;
	void *elements[QDIO_MAX_ELEMENTS_PER_BUFFER];
};

struct qeth_qdio_buffer_pool {
	struct list_head entry_list;
	int buf_count;
};

struct qeth_qdio_buffer {
	struct qdio_buffer *buffer;
	/* the buffer pool entry currently associated to this buffer */
	struct qeth_buffer_pool_entry *pool_entry;
	struct sk_buff *rx_skb;
};

struct qeth_qdio_q {
	struct qdio_buffer *qdio_bufs[QDIO_MAX_BUFFERS_PER_Q];
	struct qeth_qdio_buffer bufs[QDIO_MAX_BUFFERS_PER_Q];
	int next_buf_to_init;
};

struct qeth_qdio_out_buffer {
	struct qdio_buffer *buffer;
	atomic_t state;
	int next_element_to_fill;
	struct sk_buff_head skb_list;
	int is_header[QDIO_MAX_ELEMENTS_PER_BUFFER];

	struct qeth_qdio_out_q *q;
	struct qeth_qdio_out_buffer *next_pending;
};

struct qeth_card;

enum qeth_out_q_states {
       QETH_OUT_Q_UNLOCKED,
       QETH_OUT_Q_LOCKED,
       QETH_OUT_Q_LOCKED_FLUSH,
};

struct qeth_qdio_out_q {
	struct qdio_buffer *qdio_bufs[QDIO_MAX_BUFFERS_PER_Q];
	struct qeth_qdio_out_buffer *bufs[QDIO_MAX_BUFFERS_PER_Q];
	struct qdio_outbuf_state *bufstates; /* convenience pointer */
	int queue_no;
	struct qeth_card *card;
	atomic_t state;
	int do_pack;
	/*
	 * index of buffer to be filled by driver; state EMPTY or PACKING
	 */
	int next_buf_to_fill;
	/*
	 * number of buffers that are currently filled (PRIMED)
	 * -> these buffers are hardware-owned
	 */
	atomic_t used_buffers;
	/* indicates whether PCI flag must be set (or if one is outstanding) */
	atomic_t set_pci_flags_count;
};

struct qeth_qdio_info {
	atomic_t state;
	/* input */
	int no_in_queues;
	struct qeth_qdio_q *in_q;
	struct qeth_qdio_q *c_q;
	struct qeth_qdio_buffer_pool in_buf_pool;
	struct qeth_qdio_buffer_pool init_pool;
	int in_buf_size;

	/* output */
	int no_out_queues;
	struct qeth_qdio_out_q **out_qs;
	struct qdio_outbuf_state *out_bufstates;

	/* priority queueing */
	int do_prio_queueing;
	int default_out_queue;
};

/**
 * buffer stuff for read channel
 */
#define QETH_CMD_BUFFER_NO	8

/**
 *  channel state machine
 */
enum qeth_channel_states {
	CH_STATE_UP,
	CH_STATE_DOWN,
	CH_STATE_ACTIVATING,
	CH_STATE_HALTED,
	CH_STATE_STOPPED,
	CH_STATE_RCD,
	CH_STATE_RCD_DONE,
};
/**
 * card state machine
 */
enum qeth_card_states {
	CARD_STATE_DOWN,
	CARD_STATE_HARDSETUP,
	CARD_STATE_SOFTSETUP,
	CARD_STATE_UP,
	CARD_STATE_RECOVER,
};

/**
 * Protocol versions
 */
enum qeth_prot_versions {
	QETH_PROT_IPV4 = 0x0004,
	QETH_PROT_IPV6 = 0x0006,
};

enum qeth_cmd_buffer_state {
	BUF_STATE_FREE,
	BUF_STATE_LOCKED,
};

enum qeth_cq {
	QETH_CQ_DISABLED = 0,
	QETH_CQ_ENABLED = 1,
	QETH_CQ_NOTAVAILABLE = 2,
};

struct qeth_ipato {
	bool enabled;
	bool invert4;
	bool invert6;
	struct list_head entries;
};

struct qeth_channel;

struct qeth_cmd_buffer {
	enum qeth_cmd_buffer_state state;
	struct qeth_channel *channel;
	unsigned char *data;
	int rc;
	void (*callback)(struct qeth_card *card, struct qeth_channel *channel,
			 struct qeth_cmd_buffer *iob);
};

static inline struct qeth_ipa_cmd *__ipa_cmd(struct qeth_cmd_buffer *iob)
{
	return (struct qeth_ipa_cmd *)(iob->data + IPA_PDU_HEADER_SIZE);
}

/**
 * definition of a qeth channel, used for read and write
 */
struct qeth_channel {
	enum qeth_channel_states state;
	struct ccw1 *ccw;
	spinlock_t iob_lock;
	wait_queue_head_t wait_q;
	struct ccw_device *ccwdev;
/*command buffer for control data*/
	struct qeth_cmd_buffer iob[QETH_CMD_BUFFER_NO];
	atomic_t irq_pending;
	int io_buf_no;
};

/**
 *  OSA card related definitions
 */
struct qeth_token {
	__u32 issuer_rm_w;
	__u32 issuer_rm_r;
	__u32 cm_filter_w;
	__u32 cm_filter_r;
	__u32 cm_connection_w;
	__u32 cm_connection_r;
	__u32 ulp_filter_w;
	__u32 ulp_filter_r;
	__u32 ulp_connection_w;
	__u32 ulp_connection_r;
};

struct qeth_seqno {
	__u32 trans_hdr;
	__u32 pdu_hdr;
	__u32 pdu_hdr_ack;
	__u16 ipa;
	__u32 pkt_seqno;
};

struct qeth_reply {
	struct list_head list;
	wait_queue_head_t wait_q;
	int (*callback)(struct qeth_card *, struct qeth_reply *,
		unsigned long);
	u32 seqno;
	unsigned long offset;
	atomic_t received;
	int rc;
	void *param;
	refcount_t refcnt;
};

struct qeth_card_blkt {
	int time_total;
	int inter_packet;
	int inter_packet_jumbo;
};

#define QETH_BROADCAST_WITH_ECHO    0x01
#define QETH_BROADCAST_WITHOUT_ECHO 0x02
#define QETH_LAYER2_MAC_READ	    0x01
#define QETH_LAYER2_MAC_REGISTERED  0x02
struct qeth_card_info {
	unsigned short unit_addr2;
	unsigned short cula;
	unsigned short chpid;
	__u16 func_level;
	char mcl_level[QETH_MCL_LENGTH + 1];
	int guestlan;
	int mac_bits;
	enum qeth_card_types type;
	enum qeth_link_types link_type;
	int broadcast_capable;
	int unique_id;
	bool layer_enforced;
	struct qeth_card_blkt blkt;
	enum qeth_ipa_promisc_modes promisc_mode;
	__u32 diagass_support;
	__u32 hwtrap;
};

enum qeth_discipline_id {
	QETH_DISCIPLINE_UNDETERMINED = -1,
	QETH_DISCIPLINE_LAYER3 = 0,
	QETH_DISCIPLINE_LAYER2 = 1,
};

struct qeth_card_options {
	struct qeth_routing_info route4;
	struct qeth_ipa_info ipa4;
	struct qeth_ipa_info adp; /*Adapter parameters*/
	struct qeth_routing_info route6;
	struct qeth_ipa_info ipa6;
	struct qeth_sbp_info sbp; /* SETBRIDGEPORT options */
	struct qeth_vnicc_info vnicc; /* VNICC options */
	int fake_broadcast;
	enum qeth_discipline_id layer;
	int performance_stats;
	int rx_sg_cb;
	enum qeth_ipa_isolation_modes isolation;
	enum qeth_ipa_isolation_modes prev_isolation;
	int sniffer;
	enum qeth_cq cq;
	char hsuid[9];
};

#define	IS_LAYER2(card)	((card)->options.layer == QETH_DISCIPLINE_LAYER2)
#define	IS_LAYER3(card)	((card)->options.layer == QETH_DISCIPLINE_LAYER3)

/*
 * thread bits for qeth_card thread masks
 */
enum qeth_threads {
	QETH_RECOVER_THREAD = 1,
};

struct qeth_osn_info {
	int (*assist_cb)(struct net_device *dev, void *data);
	int (*data_cb)(struct sk_buff *skb);
};

struct qeth_discipline {
	const struct device_type *devtype;
	int (*process_rx_buffer)(struct qeth_card *card, int budget, int *done);
	int (*recover)(void *ptr);
	int (*setup) (struct ccwgroup_device *);
	void (*remove) (struct ccwgroup_device *);
	int (*set_online) (struct ccwgroup_device *);
	int (*set_offline) (struct ccwgroup_device *);
	int (*freeze)(struct ccwgroup_device *);
	int (*thaw) (struct ccwgroup_device *);
	int (*restore)(struct ccwgroup_device *);
	int (*do_ioctl)(struct net_device *dev, struct ifreq *rq, int cmd);
	int (*control_event_handler)(struct qeth_card *card,
					struct qeth_ipa_cmd *cmd);
};

struct qeth_vlan_vid {
	struct list_head list;
	unsigned short vid;
};

enum qeth_addr_disposition {
	QETH_DISP_ADDR_DELETE = 0,
	QETH_DISP_ADDR_DO_NOTHING = 1,
	QETH_DISP_ADDR_ADD = 2,
};

struct qeth_rx {
	int b_count;
	int b_index;
	struct qdio_buffer_element *b_element;
	int e_offset;
	int qdio_err;
};

struct carrier_info {
	__u8  card_type;
	__u16 port_mode;
	__u32 port_speed;
};

struct qeth_switch_info {
	__u32 capabilities;
	__u32 settings;
};

#define QETH_NAPI_WEIGHT NAPI_POLL_WEIGHT

struct qeth_card {
	struct list_head list;
	enum qeth_card_states state;
	spinlock_t lock;
	struct ccwgroup_device *gdev;
	struct qeth_channel read;
	struct qeth_channel write;
	struct qeth_channel data;

	struct net_device *dev;
	struct net_device_stats stats;

	struct qeth_card_info info;
	struct qeth_token token;
	struct qeth_seqno seqno;
	struct qeth_card_options options;

	wait_queue_head_t wait_q;
	spinlock_t mclock;
	unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
	struct mutex vid_list_mutex;		/* vid_list */
	struct list_head vid_list;
	DECLARE_HASHTABLE(mac_htable, 4);
	DECLARE_HASHTABLE(ip_htable, 4);
	DECLARE_HASHTABLE(ip_mc_htable, 4);
	struct work_struct kernel_thread_starter;
	spinlock_t thread_mask_lock;
	unsigned long thread_start_mask;
	unsigned long thread_allowed_mask;
	unsigned long thread_running_mask;
	struct task_struct *recovery_task;
	spinlock_t ip_lock;
	struct qeth_ipato ipato;
	struct list_head cmd_waiter_list;
	/* QDIO buffer handling */
	struct qeth_qdio_info qdio;
	struct qeth_perf_stats perf_stats;
	int read_or_write_problem;
	struct qeth_osn_info osn_info;
	struct qeth_discipline *discipline;
	atomic_t force_alloc_skb;
	struct service_level qeth_service_level;
	struct qdio_ssqd_desc ssqd;
	debug_info_t *debug;
	struct mutex conf_mutex;
	struct mutex discipline_mutex;
	struct napi_struct napi;
	struct qeth_rx rx;
	struct delayed_work buffer_reclaim_work;
	int reclaim_index;
	struct work_struct close_dev_work;
};

struct qeth_card_list_struct {
	struct list_head list;
	rwlock_t rwlock;
};

struct qeth_trap_id {
	__u16 lparnr;
	char vmname[8];
	__u8 chpid;
	__u8 ssid;
	__u16 devno;
} __packed;

/*some helper functions*/
#define QETH_CARD_IFNAME(card) (((card)->dev)? (card)->dev->name : "")

static inline bool qeth_netdev_is_registered(struct net_device *dev)
{
	return dev->netdev_ops != NULL;
}

static inline void qeth_scrub_qdio_buffer(struct qdio_buffer *buf,
					  unsigned int elements)
{
	unsigned int i;

	for (i = 0; i < elements; i++)
		memset(&buf->element[i], 0, sizeof(struct qdio_buffer_element));
	buf->element[14].sflags = 0;
	buf->element[15].sflags = 0;
}

/**
 * qeth_get_elements_for_range() -	find number of SBALEs to cover range.
 * @start:				Start of the address range.
 * @end:				Address after the end of the range.
 *
 * Returns the number of pages, and thus QDIO buffer elements, needed to cover
 * the specified address range.
 */
static inline int qeth_get_elements_for_range(addr_t start, addr_t end)
{
	return PFN_UP(end) - PFN_DOWN(start);
}

static inline int qeth_get_micros(void)
{
	return (int) (get_tod_clock() >> 12);
}

static inline int qeth_get_ip_version(struct sk_buff *skb)
{
	struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
	__be16 prot = veth->h_vlan_proto;

	if (prot == htons(ETH_P_8021Q))
		prot = veth->h_vlan_encapsulated_proto;

	switch (prot) {
	case htons(ETH_P_IPV6):
		return 6;
	case htons(ETH_P_IP):
		return 4;
	default:
		return 0;
	}
}

static inline void qeth_rx_csum(struct qeth_card *card, struct sk_buff *skb,
				u8 flags)
{
	if ((card->dev->features & NETIF_F_RXCSUM) &&
	    (flags & QETH_HDR_EXT_CSUM_TRANSP_REQ)) {
		skb->ip_summed = CHECKSUM_UNNECESSARY;
		if (card->options.performance_stats)
			card->perf_stats.rx_csum++;
	} else {
		skb->ip_summed = CHECKSUM_NONE;
	}
}

static inline void qeth_tx_csum(struct sk_buff *skb, u8 *flags, int ipv)
{
	*flags |= QETH_HDR_EXT_CSUM_TRANSP_REQ;
	if ((ipv == 4 && ip_hdr(skb)->protocol == IPPROTO_UDP) ||
	    (ipv == 6 && ipv6_hdr(skb)->nexthdr == IPPROTO_UDP))
		*flags |= QETH_HDR_EXT_UDP;
}

static inline void qeth_put_buffer_pool_entry(struct qeth_card *card,
		struct qeth_buffer_pool_entry *entry)
{
	list_add_tail(&entry->list, &card->qdio.in_buf_pool.entry_list);
}

static inline int qeth_is_diagass_supported(struct qeth_card *card,
		enum qeth_diags_cmds cmd)
{
	return card->info.diagass_support & (__u32)cmd;
}

int qeth_send_simple_setassparms_prot(struct qeth_card *card,
				      enum qeth_ipa_funcs ipa_func,
				      u16 cmd_code, long data,
				      enum qeth_prot_versions prot);
/* IPv4 variant */
static inline int qeth_send_simple_setassparms(struct qeth_card *card,
					       enum qeth_ipa_funcs ipa_func,
					       u16 cmd_code, long data)
{
	return qeth_send_simple_setassparms_prot(card, ipa_func, cmd_code,
						 data, QETH_PROT_IPV4);
}

static inline int qeth_send_simple_setassparms_v6(struct qeth_card *card,
						  enum qeth_ipa_funcs ipa_func,
						  u16 cmd_code, long data)
{
	return qeth_send_simple_setassparms_prot(card, ipa_func, cmd_code,
						 data, QETH_PROT_IPV6);
}

int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb,
			    int ipv);
static inline struct qeth_qdio_out_q *qeth_get_tx_queue(struct qeth_card *card,
							struct sk_buff *skb,
							int ipv, int cast_type)
{
	if (IS_IQD(card) && cast_type != RTN_UNICAST)
		return card->qdio.out_qs[card->qdio.no_out_queues - 1];
	if (!card->qdio.do_prio_queueing)
		return card->qdio.out_qs[card->qdio.default_out_queue];
	return card->qdio.out_qs[qeth_get_priority_queue(card, skb, ipv)];
}

extern struct qeth_discipline qeth_l2_discipline;
extern struct qeth_discipline qeth_l3_discipline;
extern const struct attribute_group *qeth_generic_attr_groups[];
extern const struct attribute_group *qeth_osn_attr_groups[];
extern const struct attribute_group qeth_device_attr_group;
extern const struct attribute_group qeth_device_blkt_group;
extern const struct device_type qeth_generic_devtype;
extern struct workqueue_struct *qeth_wq;

int qeth_card_hw_is_reachable(struct qeth_card *);
const char *qeth_get_cardname_short(struct qeth_card *);
int qeth_realloc_buffer_pool(struct qeth_card *, int);
int qeth_core_load_discipline(struct qeth_card *, enum qeth_discipline_id);
void qeth_core_free_discipline(struct qeth_card *);

/* exports for qeth discipline device drivers */
extern struct qeth_card_list_struct qeth_core_card_list;
extern struct kmem_cache *qeth_core_header_cache;
extern struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS];

struct net_device *qeth_clone_netdev(struct net_device *orig);
void qeth_set_recovery_task(struct qeth_card *);
void qeth_clear_recovery_task(struct qeth_card *);
void qeth_set_allowed_threads(struct qeth_card *, unsigned long , int);
int qeth_threads_running(struct qeth_card *, unsigned long);
int qeth_wait_for_threads(struct qeth_card *, unsigned long);
int qeth_do_run_thread(struct qeth_card *, unsigned long);
void qeth_clear_thread_start_bit(struct qeth_card *, unsigned long);
void qeth_clear_thread_running_bit(struct qeth_card *, unsigned long);
int qeth_core_hardsetup_card(struct qeth_card *card, bool *carrier_ok);
void qeth_print_status_message(struct qeth_card *);
int qeth_init_qdio_queues(struct qeth_card *);
int qeth_send_ipa_cmd(struct qeth_card *, struct qeth_cmd_buffer *,
		  int (*reply_cb)
		  (struct qeth_card *, struct qeth_reply *, unsigned long),
		  void *);
struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *,
			enum qeth_ipa_cmds, enum qeth_prot_versions);
struct sk_buff *qeth_core_get_next_skb(struct qeth_card *,
		struct qeth_qdio_buffer *, struct qdio_buffer_element **, int *,
		struct qeth_hdr **);
void qeth_schedule_recovery(struct qeth_card *);
int qeth_poll(struct napi_struct *napi, int budget);
void qeth_clear_ipacmd_list(struct qeth_card *);
int qeth_qdio_clear_card(struct qeth_card *, int);
void qeth_clear_working_pool_list(struct qeth_card *);
void qeth_clear_cmd_buffers(struct qeth_channel *);
void qeth_clear_qdio_buffers(struct qeth_card *);
void qeth_setadp_promisc_mode(struct qeth_card *);
struct net_device_stats *qeth_get_stats(struct net_device *);
int qeth_setadpparms_change_macaddr(struct qeth_card *);
void qeth_tx_timeout(struct net_device *);
void qeth_prepare_control_data(struct qeth_card *, int,
				struct qeth_cmd_buffer *);
void qeth_release_buffer(struct qeth_channel *, struct qeth_cmd_buffer *);
void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob);
struct qeth_cmd_buffer *qeth_wait_for_buffer(struct qeth_channel *);
int qeth_query_switch_attributes(struct qeth_card *card,
				  struct qeth_switch_info *sw_info);
int qeth_send_control_data(struct qeth_card *, int, struct qeth_cmd_buffer *,
	int (*reply_cb)(struct qeth_card *, struct qeth_reply*, unsigned long),
	void *reply_param);
unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset);
int qeth_do_send_packet_fast(struct qeth_qdio_out_q *queue, struct sk_buff *skb,
			     struct qeth_hdr *hdr, unsigned int offset,
			     unsigned int hd_len);
int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
			struct sk_buff *skb, struct qeth_hdr *hdr,
			unsigned int offset, unsigned int hd_len,
			int elements_needed);
int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
int qeth_core_get_sset_count(struct net_device *, int);
void qeth_core_get_ethtool_stats(struct net_device *,
				struct ethtool_stats *, u64 *);
void qeth_core_get_strings(struct net_device *, u32, u8 *);
void qeth_core_get_drvinfo(struct net_device *, struct ethtool_drvinfo *);
void qeth_dbf_longtext(debug_info_t *id, int level, char *text, ...);
int qeth_core_ethtool_get_link_ksettings(struct net_device *netdev,
					 struct ethtool_link_ksettings *cmd);
int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback);
int qeth_configure_cq(struct qeth_card *, enum qeth_cq);
int qeth_hw_trap(struct qeth_card *, enum qeth_diags_trap_action);
void qeth_trace_features(struct qeth_card *);
void qeth_close_dev(struct qeth_card *);
int qeth_setassparms_cb(struct qeth_card *, struct qeth_reply *, unsigned long);
struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *,
						 enum qeth_ipa_funcs,
						 __u16, __u16,
						 enum qeth_prot_versions);
int qeth_set_features(struct net_device *, netdev_features_t);
void qeth_enable_hw_features(struct net_device *dev);
netdev_features_t qeth_fix_features(struct net_device *, netdev_features_t);
netdev_features_t qeth_features_check(struct sk_buff *skb,
				      struct net_device *dev,
				      netdev_features_t features);
int qeth_vm_request_mac(struct qeth_card *card);
int qeth_add_hw_header(struct qeth_card *card, struct sk_buff *skb,
		       struct qeth_hdr **hdr, unsigned int hdr_len,
		       unsigned int proto_len, unsigned int *elements);
void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr, unsigned int payload_len,
		       struct sk_buff *skb, unsigned int proto_len);
int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
	      struct qeth_qdio_out_q *queue, int ipv, int cast_type,
	      void (*fill_header)(struct qeth_card *card, struct qeth_hdr *hdr,
				  struct sk_buff *skb, int ipv, int cast_type,
				  unsigned int data_len));

/* exports for OSN */
int qeth_osn_assist(struct net_device *, void *, int);
int qeth_osn_register(unsigned char *read_dev_no, struct net_device **,
		int (*assist_cb)(struct net_device *, void *),
		int (*data_cb)(struct sk_buff *));
void qeth_osn_deregister(struct net_device *);

#endif /* __QETH_CORE_H__ */