aboutsummaryrefslogtreecommitdiffstats
path: root/net/ipv6/ah6.c
diff options
context:
space:
mode:
authorArnaldo Carvalho de Melo <acme@redhat.com>2007-04-11 00:21:55 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-26 01:26:20 -0400
commitb0e380b1d8a8e0aca215df97702f99815f05c094 (patch)
tree95f402ca155f5211150178811669ebf0a88e8e00 /net/ipv6/ah6.c
parentcfe1fc7759fdacb0c650b575daed1692bf3eaece (diff)
[SK_BUFF]: unions of just one member don't get anything done, kill them
Renaming skb->h to skb->transport_header, skb->nh to skb->network_header and skb->mac to skb->mac_header, to match the names of the associated helpers (skb[_[re]set]_{transport,network,mac}_header). Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ah6.c')
-rw-r--r--net/ipv6/ah6.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/net/ipv6/ah6.c b/net/ipv6/ah6.c
index d2af4fe3725b..b696c8401200 100644
--- a/net/ipv6/ah6.c
+++ b/net/ipv6/ah6.c
@@ -316,8 +316,8 @@ static int ah6_input(struct xfrm_state *x, struct sk_buff *skb)
316 * 316 *
317 * To erase AH: 317 * To erase AH:
318 * Keeping copy of cleared headers. After AH processing, 318 * Keeping copy of cleared headers. After AH processing,
319 * Moving the pointer of skb->nh.raw by using skb_pull as long as AH 319 * Moving the pointer of skb->network_header by using skb_pull as long
320 * header length. Then copy back the copy as long as hdr_len 320 * as AH header length. Then copy back the copy as long as hdr_len
321 * If destination header following AH exists, copy it into after [Ext2]. 321 * If destination header following AH exists, copy it into after [Ext2].
322 * 322 *
323 * |<>|[IPv6][Ext1][Ext2][Dest][Payload] 323 * |<>|[IPv6][Ext1][Ext2][Dest][Payload]
@@ -384,9 +384,9 @@ static int ah6_input(struct xfrm_state *x, struct sk_buff *skb)
384 } 384 }
385 } 385 }
386 386
387 skb->nh.raw += ah_hlen; 387 skb->network_header += ah_hlen;
388 memcpy(skb_network_header(skb), tmp_hdr, hdr_len); 388 memcpy(skb_network_header(skb), tmp_hdr, hdr_len);
389 skb->h.raw = skb->nh.raw; 389 skb->transport_header = skb->network_header;
390 __skb_pull(skb, ah_hlen + hdr_len); 390 __skb_pull(skb, ah_hlen + hdr_len);
391 391
392 kfree(tmp_hdr); 392 kfree(tmp_hdr);
ide-disk: use do_rw_taskfile() (take 2)' href='/cgit/cgit.cgi/litmus-rt.git/commit/drivers/ide/ide-disk.c?h=gpusync-rtss12&id=f6e29e35cc0f9facf2eb0b0454f9b09021b5aa6f'>f6e29e35cc0f
1da177e4c3f4
238e4f142c33
1da177e4c3f4










9e42237f26cf

657cc1a8f6cd
2bd06b23e2a0
1da177e4c3f4

c2f8311d3168

1da177e4c3f4
790d1239898d
2bd06b23e2a0



1da177e4c3f4
2bd06b23e2a0
790d1239898d
2bd06b23e2a0


6dd9b8376adb
657cc1a8f6cd
1da177e4c3f4
790d1239898d
2bd06b23e2a0



1da177e4c3f4




1da177e4c3f4




790d1239898d
2bd06b23e2a0



1da177e4c3f4

ba76ae3883ad



f6e29e35cc0f


ba76ae3883ad
f6e29e35cc0f
2bd06b23e2a0
f6e29e35cc0f
1da177e4c3f4
f6e29e35cc0f
ba76ae3883ad
f6e29e35cc0f
1da177e4c3f4
f6e29e35cc0f
1da177e4c3f4

f6e29e35cc0f
1da177e4c3f4



















2bfb646cdf34

1da177e4c3f4

c2f8311d3168

1da177e4c3f4










7a3b7512d0d7
1da177e4c3f4

650d841d9e05
7a3b7512d0d7
1da177e4c3f4


7a3b7512d0d7



650d841d9e05
657cc1a8f6cd
a3bbb9d882dc
657cc1a8f6cd
1da177e4c3f4
9a3c49be5c5f
1da177e4c3f4

a501633c7d44

650d841d9e05
1da177e4c3f4






7a3b7512d0d7
1da177e4c3f4

650d841d9e05
7a3b7512d0d7
1da177e4c3f4



650d841d9e05


7a3b7512d0d7









657cc1a8f6cd
a3bbb9d882dc
657cc1a8f6cd
1da177e4c3f4
9a3c49be5c5f
1da177e4c3f4
a501633c7d44

650d841d9e05
1da177e4c3f4




























b0244a00451c





7062cdc5edb3
b152fcd34108
b0244a00451c


858119e15938
1da177e4c3f4




7a3b7512d0d7

1da177e4c3f4
b0244a00451c








1da177e4c3f4









7a3b7512d0d7

1da177e4c3f4




















































ecfd80e4a514
1da177e4c3f4


650d841d9e05
1da177e4c3f4

650d841d9e05



657cc1a8f6cd
9a3c49be5c5f
1da177e4c3f4

43e7c0c4bfdf
1da177e4c3f4

650d841d9e05
1da177e4c3f4

650d841d9e05




657cc1a8f6cd
ac026ff254b3
1da177e4c3f4
ac026ff254b3
1da177e4c3f4































43e7c0c4bfdf
1da177e4c3f4

















43e7c0c4bfdf
1da177e4c3f4



















ecfd80e4a514
1da177e4c3f4
165125e1e480
1da177e4c3f4

395d8ef5bebe
1da177e4c3f4
395d8ef5bebe



1da177e4c3f4

395d8ef5bebe
1da177e4c3f4
395d8ef5bebe



1da177e4c3f4
813a0eb233ee
4aff5e2333c9
395d8ef5bebe
1da177e4c3f4

1da177e4c3f4







1497943ee692


1da177e4c3f4

852738f39258
1da177e4c3f4
852738f39258

1da177e4c3f4







1497943ee692


1da177e4c3f4







3e087b575496




3e087b575496












361934849e9c
3e087b575496



f7ad836c4442
3e087b575496



3e087b575496




3e087b575496

1da177e4c3f4


3e087b575496
1da177e4c3f4
1497943ee692


3e087b575496

650d841d9e05
1da177e4c3f4
650d841d9e05
657cc1a8f6cd
9a3c49be5c5f
3e087b575496


1da177e4c3f4
3e087b575496
1da177e4c3f4
3e087b575496
1da177e4c3f4







650d841d9e05
1da177e4c3f4
650d841d9e05
657cc1a8f6cd
9a3c49be5c5f
1da177e4c3f4





1497943ee692


1da177e4c3f4
650d841d9e05


657cc1a8f6cd
9a3c49be5c5f
1da177e4c3f4











1497943ee692


1da177e4c3f4

238e4f142c33
1da177e4c3f4







7662d046df09
1da177e4c3f4



1497943ee692



1497943ee692






1da177e4c3f4
7662d046df09


1da177e4c3f4


238e4f142c33
1da177e4c3f4

1da177e4c3f4





9810933701a0
1da177e4c3f4










1da177e4c3f4





















238e4f142c33
1da177e4c3f4









































d12faa2736eb
1da177e4c3f4
3ab7efe8e2cb

1da177e4c3f4
1da177e4c3f4




1da177e4c3f4










4031bbe4bbec
1da177e4c3f4



7662d046df09
8604affde9d4
1da177e4c3f4

d36fef6f5aa4

1da177e4c3f4
1da177e4c3f4








1da177e4c3f4




4031bbe4bbec
1da177e4c3f4
0d2157f78d17










4031bbe4bbec
1da177e4c3f4
1da177e4c3f4



















d12faa2736eb

4031bbe4bbec
1da177e4c3f4

1da177e4c3f4
1da177e4c3f4
4ef3b8f4a5c0
8604affde9d4

1da177e4c3f4
4031bbe4bbec

0d2157f78d17
4031bbe4bbec
1da177e4c3f4

1da177e4c3f4
1da177e4c3f4



7662d046df09
1da177e4c3f4
7662d046df09
1da177e4c3f4

29ec683f0196





657cc1a8f6cd
29ec683f0196



1da177e4c3f4










c94964a4555e


1da177e4c3f4





29ec683f0196
1da177e4c3f4










c94964a4555e
1da177e4c3f4
c94964a4555e

29ec683f0196
1da177e4c3f4

c94964a4555e

1da177e4c3f4





a885c8c4316e










1da177e4c3f4


1497943ee692
1da177e4c3f4

1497943ee692



















f9383c4269d2
1497943ee692


f9383c4269d2
1497943ee692








f9383c4269d2
1497943ee692
f9383c4269d2
1497943ee692


1da177e4c3f4



























a885c8c4316e
1da177e4c3f4





4031bbe4bbec
1da177e4c3f4











f5e3c2faa206
1da177e4c3f4


1946089a1092
86b3786078d6
1da177e4c3f4




7662d046df09
1da177e4c3f4
1da177e4c3f4









1da177e4c3f4






8604affde9d4
1da177e4c3f4
1da177e4c3f4






1da177e4c3f4


8604affde9d4
1da177e4c3f4



8604affde9d4
1da177e4c3f4

17514e8a6f18
1da177e4c3f4
8604affde9d4
1da177e4c3f4

263756ec228f
1da177e4c3f4


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
  



                                                                         






                                                                   


                              
               










                            
                        
                       














                                
                                                                      
  
                                       








                                                                       
                                       

                                      
                                         





                                                   
                                       
                                                
                                         













                                                                             


                                          






























                                                                          










































                                                                        






                                                                                               
                                                      
                                                                   
                                               
                                   
 
                                                                          









                                                        
                                                               
                                                           
 
                                  
                                                                    
 
                                                               


                                                                      
                         
 
                                                     

                                                       
 
                                                                           
                        
                                                     


                                                        



                                                     



                                                                             
                                             


                                      
         


                                                 

                                                   
 
                                          
 
                                       
                                     
                                                            
                                                
                                                   
                                           
                                                  
         
                  


















                                                                                              
                               
                                                                        
                                                           









                                                               
                                                                         
                        
                                           
                     

                                                      


                                                      
                              
                                                        
                  
                                                                   
                                    
                                           
                                                  
                                                       
 





                                                                 
                                                                               
                        
                                           
                         


                                                      

                                               








                                                       
                                                        
                  
                                                                   
                                    
                                           
                                                  
                                                           
 



























                                                                           




                                                       
                               
                               

                              
                                                 



                                                      
                                                                
 







                                                                           








                                                                          
                                                                 



















































                                                                             
                         

                                           
                                           
                                             


                                      
                                                        
                                                  
 
                                                                  
                        
                                           
                                             



                                      
                                                          
                                      
                                   
                                                      






























                                                                              
                                                                      
















                                                                                                 
                                                                  


















                                                                                                       
                                
 
                                                                              
                                          
                                                              
 


                                                         
                                                    
                                                       
            


                                                                    
 
                                             
                                         
                           
 






                                                                    

                                                     
                                          
 
                                 
                                            






                                                       

                               






                                                         



                                              











                                                                      
                                                                          


                                                                              
                                                           


                                                            



                                                          
 

                                                   
                    
 

                               
                                                     
                                       
                                                                       
                                                  
                                                                
                                                         

                                            
 
                              
 
                   






                                                     
                                                      
            
                                                  
                                                        
                                                  




                                                     

                                 
                                             

                                                                         
                                                        
                                           










                                                          

                               
                               
                                                         






                                               
                         


                                                    


                                                                                                                                                                            





                                                                                                                                                                       
 

                                                                 

                                              
                                       
                                          




                                    
                               









                                                                     




















                                                                                                      
                                                                               








































                                                                                   
                                                                     
 
                                                                              
 



                                                            









                                                                            
                                               


                                                       
                                                        
 
                       
                                
                           







                                                      



                               
                                              
 









                                               
                                                   
 


















                                                                     
                                                        
                                                                 
 
                                      
                       
                                              
                                                
          
                                                  
                                                  
                                                      
                                                  
                                    


                                                  
                         
                                               
      
  




                                                             
                                                        


                                                  









                                                               

                                                     




                                                                 
                                                                         









                                                                  
                               
                                        
                                                     
                                                                         
                                               
                        




                           









                                                                             

                                                                
                            
                                                              


















                                                                              
                                     

                                                 
                                       







                                                                  
                                                     
                                                  
                                                       

                   


























                                                                        
                                         




                                                 
                                             










                                                   
                                                  

                            
                                            
                                                   



                                   
                                                         
 








                                        





                                                                             
 
                                    





                                                             

                    
                       


                                      
                                                      
 
                                    
 
                                                           
 
                             

                          
/*
 *  Copyright (C) 1994-1998	   Linus Torvalds & authors (see below)
 *  Copyright (C) 1998-2002	   Linux ATA Development
 *				      Andre Hedrick <andre@linux-ide.org>
 *  Copyright (C) 2003		   Red Hat <alan@redhat.com>
 *  Copyright (C) 2003-2005, 2007  Bartlomiej Zolnierkiewicz
 */

/*
 *  Mostly written by Mark Lord <mlord@pobox.com>
 *                and Gadi Oxman <gadio@netvision.net.il>
 *                and Andre Hedrick <andre@linux-ide.org>
 *
 * This is the IDE/ATA disk driver, as evolved from hd.c and ide.c.
 */

#define IDEDISK_VERSION	"1.18"

//#define DEBUG

#include <linux/module.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/major.h>
#include <linux/errno.h>
#include <linux/genhd.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/leds.h>

#define _IDE_DISK

#include <linux/ide.h>

#include <asm/byteorder.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/div64.h>

struct ide_disk_obj {
	ide_drive_t	*drive;
	ide_driver_t	*driver;
	struct gendisk	*disk;
	struct kref	kref;
	unsigned int	openers;	/* protected by BKL for now */
};

static DEFINE_MUTEX(idedisk_ref_mutex);

#define to_ide_disk(obj) container_of(obj, struct ide_disk_obj, kref)

#define ide_disk_g(disk) \
	container_of((disk)->private_data, struct ide_disk_obj, driver)

static struct ide_disk_obj *ide_disk_get(struct gendisk *disk)
{
	struct ide_disk_obj *idkp = NULL;

	mutex_lock(&idedisk_ref_mutex);
	idkp = ide_disk_g(disk);
	if (idkp)
		kref_get(&idkp->kref);
	mutex_unlock(&idedisk_ref_mutex);
	return idkp;
}

static void ide_disk_release(struct kref *);

static void ide_disk_put(struct ide_disk_obj *idkp)
{
	mutex_lock(&idedisk_ref_mutex);
	kref_put(&idkp->kref, ide_disk_release);
	mutex_unlock(&idedisk_ref_mutex);
}

/*
 * lba_capacity_is_ok() performs a sanity check on the claimed "lba_capacity"
 * value for this drive (from its reported identification information).
 *
 * Returns:	1 if lba_capacity looks sensible
 *		0 otherwise
 *
 * It is called only once for each drive.
 */
static int lba_capacity_is_ok (struct hd_driveid *id)
{
	unsigned long lba_sects, chs_sects, head, tail;

	/* No non-LBA info .. so valid! */
	if (id->cyls == 0)
		return 1;

	/*
	 * The ATA spec tells large drives to return
	 * C/H/S = 16383/16/63 independent of their size.
	 * Some drives can be jumpered to use 15 heads instead of 16.
	 * Some drives can be jumpered to use 4092 cyls instead of 16383.
	 */
	if ((id->cyls == 16383
	     || (id->cyls == 4092 && id->cur_cyls == 16383)) &&
	    id->sectors == 63 &&
	    (id->heads == 15 || id->heads == 16) &&
	    (id->lba_capacity >= 16383*63*id->heads))
		return 1;

	lba_sects   = id->lba_capacity;
	chs_sects   = id->cyls * id->heads * id->sectors;

	/* perform a rough sanity check on lba_sects:  within 10% is OK */
	if ((lba_sects - chs_sects) < chs_sects/10)
		return 1;

	/* some drives have the word order reversed */
	head = ((lba_sects >> 16) & 0xffff);
	tail = (lba_sects & 0xffff);
	lba_sects = (head | (tail << 16));
	if ((lba_sects - chs_sects) < chs_sects/10) {
		id->lba_capacity = lba_sects;
		return 1;	/* lba_capacity is (now) good */
	}

	return 0;	/* lba_capacity value may be bad */
}

static const u8 ide_rw_cmds[] = {
	WIN_MULTREAD,
	WIN_MULTWRITE,
	WIN_MULTREAD_EXT,
	WIN_MULTWRITE_EXT,
	WIN_READ,
	WIN_WRITE,
	WIN_READ_EXT,
	WIN_WRITE_EXT,
	WIN_READDMA,
	WIN_WRITEDMA,
	WIN_READDMA_EXT,
	WIN_WRITEDMA_EXT,
};

static const u8 ide_data_phases[] = {
	TASKFILE_MULTI_IN,
	TASKFILE_MULTI_OUT,
	TASKFILE_IN,
	TASKFILE_OUT,
	TASKFILE_IN_DMA,
	TASKFILE_OUT_DMA,
};

static void ide_tf_set_cmd(ide_drive_t *drive, ide_task_t *task, u8 dma)
{
	u8 index, lba48, write;

	lba48 = (task->tf_flags & IDE_TFLAG_LBA48) ? 2 : 0;
	write = (task->tf_flags & IDE_TFLAG_WRITE) ? 1 : 0;

	if (dma)
		index = drive->vdma ? 4 : 8;
	else
		index = drive->mult_count ? 0 : 4;

	task->tf.command = ide_rw_cmds[index + lba48 + write];

	if (dma)
		index = 8; /* fixup index */

	task->data_phase = ide_data_phases[index / 2 + write];
}

/*
 * __ide_do_rw_disk() issues READ and WRITE commands to a disk,
 * using LBA if supported, or CHS otherwise, to address sectors.
 */
static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq, sector_t block)
{
	ide_hwif_t *hwif	= HWIF(drive);
	unsigned int dma	= drive->using_dma;
	u16 nsectors		= (u16)rq->nr_sectors;
	u8 lba48		= (drive->addressing == 1) ? 1 : 0;
	ide_task_t		task;
	struct ide_taskfile	*tf = &task.tf;
	ide_startstop_t		rc;

	if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) {
		if (block + rq->nr_sectors > 1ULL << 28)
			dma = 0;
		else
			lba48 = 0;
	}

	if (!dma) {
		ide_init_sg_cmd(drive, rq);
		ide_map_sg(drive, rq);
	}

	memset(&task, 0, sizeof(task));
	task.tf_flags = IDE_TFLAG_NO_SELECT_MASK;  /* FIXME? */
	task.tf_flags |= (IDE_TFLAG_TF | IDE_TFLAG_DEVICE);

	if (drive->select.b.lba) {
		if (lba48) {
			pr_debug("%s: LBA=0x%012llx\n", drive->name,
					(unsigned long long)block);

			tf->hob_nsect = (nsectors >> 8) & 0xff;
			tf->hob_lbal  = (u8)(block >> 24);
			if (sizeof(block) != 4) {
				tf->hob_lbam = (u8)((u64)block >> 32);
				tf->hob_lbah = (u8)((u64)block >> 40);
			}

			tf->nsect  = nsectors & 0xff;
			tf->lbal   = (u8) block;
			tf->lbam   = (u8)(block >>  8);
			tf->lbah   = (u8)(block >> 16);

			task.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB);
		} else {
			tf->nsect  = nsectors & 0xff;
			tf->lbal   = block;
			tf->lbam   = block >>= 8;
			tf->lbah   = block >>= 8;
			tf->device = (block >> 8) & 0xf;
		}
	} else {
		unsigned int sect,head,cyl,track;
		track = (int)block / drive->sect;
		sect  = (int)block % drive->sect + 1;
		head  = track % drive->head;
		cyl   = track / drive->head;

		pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect);

		tf->nsect  = nsectors & 0xff;
		tf->lbal   = sect;
		tf->lbam   = cyl;
		tf->lbah   = cyl >> 8;
		tf->device = head;
	}

	if (rq_data_dir(rq))
		task.tf_flags |= IDE_TFLAG_WRITE;

	ide_tf_set_cmd(drive, &task, dma);
	if (!dma)
		hwif->data_phase = task.data_phase;
	task.rq = rq;

	rc = do_rw_taskfile(drive, &task);

	if (rc == ide_stopped && dma) {
		/* fallback to PIO */
		task.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK;
		ide_tf_set_cmd(drive, &task, 0);
		hwif->data_phase = task.data_phase;
		ide_init_sg_cmd(drive, rq);
		rc = do_rw_taskfile(drive, &task);
	}

	return rc;
}

/*
 * 268435455  == 137439 MB or 28bit limit
 * 320173056  == 163929 MB or 48bit addressing
 * 1073741822 == 549756 MB or 48bit addressing fake drive
 */

static ide_startstop_t ide_do_rw_disk (ide_drive_t *drive, struct request *rq, sector_t block)
{
	ide_hwif_t *hwif = HWIF(drive);

	BUG_ON(drive->blocked);

	if (!blk_fs_request(rq)) {
		blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command");
		ide_end_request(drive, 0, 0);
		return ide_stopped;
	}

	ledtrig_ide_activity();

	pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n",
		 drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
		 (unsigned long long)block, rq->nr_sectors,
		 (unsigned long)rq->buffer);

	if (hwif->rw_disk)
		hwif->rw_disk(drive, rq);

	return __ide_do_rw_disk(drive, rq, block);
}

/*
 * Queries for true maximum capacity of the drive.
 * Returns maximum LBA address (> 0) of the drive, 0 if failed.
 */
static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48)
{
	ide_task_t args;
	struct ide_taskfile *tf = &args.tf;
	u64 addr = 0;

	/* Create IDE/ATA command request structure */
	memset(&args, 0, sizeof(ide_task_t));
	if (lba48)
		tf->command = WIN_READ_NATIVE_MAX_EXT;
	else
		tf->command = WIN_READ_NATIVE_MAX;
	tf->device  = ATA_LBA;
	args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
	if (lba48)
		args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB);
	/* submit command request */
	ide_no_data_taskfile(drive, &args);

	/* if OK, compute maximum address value */
	if ((tf->status & 0x01) == 0)
		addr = ide_get_lba_addr(tf, lba48) + 1;

	return addr;
}

/*
 * Sets maximum virtual LBA address of the drive.
 * Returns new maximum virtual LBA address (> 0) or 0 on failure.
 */
static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48)
{
	ide_task_t args;
	struct ide_taskfile *tf = &args.tf;
	u64 addr_set = 0;

	addr_req--;
	/* Create IDE/ATA command request structure */
	memset(&args, 0, sizeof(ide_task_t));
	tf->lbal     = (addr_req >>  0) & 0xff;
	tf->lbam     = (addr_req >>= 8) & 0xff;
	tf->lbah     = (addr_req >>= 8) & 0xff;
	if (lba48) {
		tf->hob_lbal = (addr_req >>= 8) & 0xff;
		tf->hob_lbam = (addr_req >>= 8) & 0xff;
		tf->hob_lbah = (addr_req >>= 8) & 0xff;
		tf->command  = WIN_SET_MAX_EXT;
	} else {
		tf->device   = (addr_req >>= 8) & 0x0f;
		tf->command  = WIN_SET_MAX;
	}
	tf->device |= ATA_LBA;
	args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
	if (lba48)
		args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB);
	/* submit command request */
	ide_no_data_taskfile(drive, &args);
	/* if OK, compute maximum address value */
	if ((tf->status & 0x01) == 0)
		addr_set = ide_get_lba_addr(tf, lba48) + 1;

	return addr_set;
}

static unsigned long long sectors_to_MB(unsigned long long n)
{
	n <<= 9;		/* make it bytes */
	do_div(n, 1000000);	/* make it MB */
	return n;
}

/*
 * Bits 10 of command_set_1 and cfs_enable_1 must be equal,
 * so on non-buggy drives we need test only one.
 * However, we should also check whether these fields are valid.
 */
static inline int idedisk_supports_hpa(const struct hd_driveid *id)
{
	return (id->command_set_1 & 0x0400) && (id->cfs_enable_1 & 0x0400);
}

/*
 * The same here.
 */
static inline int idedisk_supports_lba48(const struct hd_driveid *id)
{
	return (id->command_set_2 & 0x0400) && (id->cfs_enable_2 & 0x0400)
	       && id->lba_capacity_2;
}

/*
 * Some disks report total number of sectors instead of
 * maximum sector address.  We list them here.
 */
static const struct drive_list_entry hpa_list[] = {
	{ "ST340823A",	NULL },
	{ "ST320413A",	NULL },
	{ "ST310211A",	NULL },
	{ NULL,		NULL }
};

static void idedisk_check_hpa(ide_drive_t *drive)
{
	unsigned long long capacity, set_max;
	int lba48 = idedisk_supports_lba48(drive->id);

	capacity = drive->capacity64;

	set_max = idedisk_read_native_max_address(drive, lba48);

	if (ide_in_drive_list(drive->id, hpa_list)) {
		/*
		 * Since we are inclusive wrt to firmware revisions do this
		 * extra check and apply the workaround only when needed.
		 */
		if (set_max == capacity + 1)
			set_max--;
	}

	if (set_max <= capacity)
		return;

	printk(KERN_INFO "%s: Host Protected Area detected.\n"
			 "\tcurrent capacity is %llu sectors (%llu MB)\n"
			 "\tnative  capacity is %llu sectors (%llu MB)\n",
			 drive->name,
			 capacity, sectors_to_MB(capacity),
			 set_max, sectors_to_MB(set_max));

	set_max = idedisk_set_max_address(drive, set_max, lba48);

	if (set_max) {
		drive->capacity64 = set_max;
		printk(KERN_INFO "%s: Host Protected Area disabled.\n",
				 drive->name);
	}
}

/*
 * Compute drive->capacity, the full capacity of the drive
 * Called with drive->id != NULL.
 *
 * To compute capacity, this uses either of
 *
 *    1. CHS value set by user       (whatever user sets will be trusted)
 *    2. LBA value from target drive (require new ATA feature)
 *    3. LBA value from system BIOS  (new one is OK, old one may break)
 *    4. CHS value from system BIOS  (traditional style)
 *
 * in above order (i.e., if value of higher priority is available,
 * reset will be ignored).
 */
static void init_idedisk_capacity (ide_drive_t  *drive)
{
	struct hd_driveid *id = drive->id;
	/*
	 * If this drive supports the Host Protected Area feature set,
	 * then we may need to change our opinion about the drive's capacity.
	 */
	int hpa = idedisk_supports_hpa(id);

	if (idedisk_supports_lba48(id)) {
		/* drive speaks 48-bit LBA */
		drive->select.b.lba = 1;
		drive->capacity64 = id->lba_capacity_2;
		if (hpa)
			idedisk_check_hpa(drive);
	} else if ((id->capability & 2) && lba_capacity_is_ok(id)) {
		/* drive speaks 28-bit LBA */
		drive->select.b.lba = 1;
		drive->capacity64 = id->lba_capacity;
		if (hpa)
			idedisk_check_hpa(drive);
	} else {
		/* drive speaks boring old 28-bit CHS */
		drive->capacity64 = drive->cyl * drive->head * drive->sect;
	}
}

static sector_t idedisk_capacity (ide_drive_t *drive)
{
	return drive->capacity64 - drive->sect0;
}

#ifdef CONFIG_IDE_PROC_FS
static int smart_enable(ide_drive_t *drive)
{
	ide_task_t args;
	struct ide_taskfile *tf = &args.tf;

	memset(&args, 0, sizeof(ide_task_t));
	tf->feature = SMART_ENABLE;
	tf->lbam    = SMART_LCYL_PASS;
	tf->lbah    = SMART_HCYL_PASS;
	tf->command = WIN_SMART;
	args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
	return ide_no_data_taskfile(drive, &args);
}

static int get_smart_data(ide_drive_t *drive, u8 *buf, u8 sub_cmd)
{
	ide_task_t args;
	struct ide_taskfile *tf = &args.tf;