forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 0
/
eata.c
2578 lines (2213 loc) · 76.1 KB
/
eata.c
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
/*
* eata.c - Low-level driver for EATA/DMA SCSI host adapters.
*
* 03 Jun 2003 Rev. 8.10 for linux-2.5.70
* + Update for new IRQ API.
* + Use "goto" when appropriate.
* + Drop eata.h.
* + Update for new module_param API.
* + Module parameters can now be specified only in the
* same format as the kernel boot options.
*
* boot option old module param
* ----------- ------------------
* addr,... io_port=addr,...
* lc:[y|n] linked_comm=[1|0]
* mq:xx max_queue_depth=xx
* tm:[0|1|2] tag_mode=[0|1|2]
* et:[y|n] ext_tran=[1|0]
* rs:[y|n] rev_scan=[1|0]
* ip:[y|n] isa_probe=[1|0]
* ep:[y|n] eisa_probe=[1|0]
* pp:[y|n] pci_probe=[1|0]
*
* A valid example using the new parameter format is:
* modprobe eata "eata=0x7410,0x230,lc:y,tm:0,mq:4,ep:n"
*
* which is equivalent to the old format:
* modprobe eata io_port=0x7410,0x230 linked_comm=1 tag_mode=0 \
* max_queue_depth=4 eisa_probe=0
*
* 12 Feb 2003 Rev. 8.04 for linux 2.5.60
* + Release irq before calling scsi_register.
*
* 12 Nov 2002 Rev. 8.02 for linux 2.5.47
* + Release driver_lock before calling scsi_register.
*
* 11 Nov 2002 Rev. 8.01 for linux 2.5.47
* + Fixed bios_param and scsicam_bios_param calling parameters.
*
* 28 Oct 2002 Rev. 8.00 for linux 2.5.44-ac4
* + Use new tcq and adjust_queue_depth api.
* + New command line option (tm:[0-2]) to choose the type of tags:
* 0 -> disable tagging ; 1 -> simple tags ; 2 -> ordered tags.
* Default is tm:0 (tagged commands disabled).
* For compatibility the "tc:" option is an alias of the "tm:"
* option; tc:n is equivalent to tm:0 and tc:y is equivalent to
* tm:1.
* + The tagged_comm module parameter has been removed, use tag_mode
* instead, equivalent to the "tm:" boot option.
*
* 10 Oct 2002 Rev. 7.70 for linux 2.5.42
* + Foreport from revision 6.70.
*
* 25 Jun 2002 Rev. 6.70 for linux 2.4.19
* + This release is the first one tested on a Big Endian platform:
* fixed endian-ness problem due to bitfields;
* fixed endian-ness problem in read_pio.
* + Added new options for selectively probing ISA, EISA and PCI bus:
*
* Boot option Parameter name Default according to
*
* ip:[y|n] isa_probe=[1|0] CONFIG_ISA defined
* ep:[y|n] eisa_probe=[1|0] CONFIG_EISA defined
* pp:[y|n] pci_probe=[1|0] CONFIG_PCI defined
*
* The default action is to perform probing if the corresponding
* bus is configured and to skip probing otherwise.
*
* + If pci_probe is in effect and a list of I/O ports is specified
* as parameter or boot option, pci_enable_device() is performed
* on all pci devices matching PCI_CLASS_STORAGE_SCSI.
*
* 21 Feb 2002 Rev. 6.52 for linux 2.4.18
* + Backport from rev. 7.22 (use io_request_lock).
*
* 20 Feb 2002 Rev. 7.22 for linux 2.5.5
* + Remove any reference to virt_to_bus().
* + Fix pio hang while detecting multiple HBAs.
* + Fixed a board detection bug: in a system with
* multiple ISA/EISA boards, all but the first one
* were erroneously detected as PCI.
*
* 01 Jan 2002 Rev. 7.20 for linux 2.5.1
* + Use the dynamic DMA mapping API.
*
* 19 Dec 2001 Rev. 7.02 for linux 2.5.1
* + Use SCpnt->sc_data_direction if set.
* + Use sglist.page instead of sglist.address.
*
* 11 Dec 2001 Rev. 7.00 for linux 2.5.1
* + Use host->host_lock instead of io_request_lock.
*
* 1 May 2001 Rev. 6.05 for linux 2.4.4
* + Clean up all pci related routines.
* + Fix data transfer direction for opcode SEND_CUE_SHEET (0x5d)
*
* 30 Jan 2001 Rev. 6.04 for linux 2.4.1
* + Call pci_resource_start after pci_enable_device.
*
* 25 Jan 2001 Rev. 6.03 for linux 2.4.0
* + "check_region" call replaced by "request_region".
*
* 22 Nov 2000 Rev. 6.02 for linux 2.4.0-test11
* + Return code checked when calling pci_enable_device.
* + Removed old scsi error handling support.
* + The obsolete boot option flag eh:n is silently ignored.
* + Removed error messages while a disk drive is powered up at
* boot time.
* + Improved boot messages: all tagged capable device are
* indicated as "tagged" or "soft-tagged" :
* - "soft-tagged" means that the driver is trying to do its
* own tagging (i.e. the tc:y option is in effect);
* - "tagged" means that the device supports tagged commands,
* but the driver lets the HBA be responsible for tagging
* support.
*
* 16 Sep 1999 Rev. 5.11 for linux 2.2.12 and 2.3.18
* + Updated to the new __setup interface for boot command line options.
* + When loaded as a module, accepts the new parameter boot_options
* which value is a string with the same format of the kernel boot
* command line options. A valid example is:
* modprobe eata 'boot_options="0x7410,0x230,lc:y,tc:n,mq:4"'
*
* 9 Sep 1999 Rev. 5.10 for linux 2.2.12 and 2.3.17
* + 64bit cleanup for Linux/Alpha platform support
* (contribution from H.J. Lu).
*
* 22 Jul 1999 Rev. 5.00 for linux 2.2.10 and 2.3.11
* + Removed pre-2.2 source code compatibility.
* + Added call to pci_set_master.
*
* 26 Jul 1998 Rev. 4.33 for linux 2.0.35 and 2.1.111
* + Added command line option (rs:[y|n]) to reverse the scan order
* of PCI boards. The default is rs:y, which reverses the BIOS order
* while registering PCI boards. The default value rs:y generates
* the same order of all previous revisions of this driver.
* Pls. note that "BIOS order" might have been reversed itself
* after the 2.1.9x PCI modifications in the linux kernel.
* The rs value is ignored when the explicit list of addresses
* is used by the "eata=port0,port1,..." command line option.
* + Added command line option (et:[y|n]) to force use of extended
* translation (255 heads, 63 sectors) as disk geometry.
* The default is et:n, which uses the disk geometry returned
* by scsicam_bios_param. The default value et:n is compatible with
* all previous revisions of this driver.
*
* 28 May 1998 Rev. 4.32 for linux 2.0.33 and 2.1.104
* Increased busy timeout from 10 msec. to 200 msec. while
* processing interrupts.
*
* 16 May 1998 Rev. 4.31 for linux 2.0.33 and 2.1.102
* Improved abort handling during the eh recovery process.
*
* 13 May 1998 Rev. 4.30 for linux 2.0.33 and 2.1.101
* The driver is now fully SMP safe, including the
* abort and reset routines.
* Added command line options (eh:[y|n]) to choose between
* new_eh_code and the old scsi code.
* If linux version >= 2.1.101 the default is eh:y, while the eh
* option is ignored for previous releases and the old scsi code
* is used.
*
* 18 Apr 1998 Rev. 4.20 for linux 2.0.33 and 2.1.97
* Reworked interrupt handler.
*
* 11 Apr 1998 rev. 4.05 for linux 2.0.33 and 2.1.95
* Major reliability improvement: when a batch with overlapping
* requests is detected, requests are queued one at a time
* eliminating any possible board or drive reordering.
*
* 10 Apr 1998 rev. 4.04 for linux 2.0.33 and 2.1.95
* Improved SMP support (if linux version >= 2.1.95).
*
* 9 Apr 1998 rev. 4.03 for linux 2.0.33 and 2.1.94
* Added support for new PCI code and IO-APIC remapping of irqs.
* Performance improvement: when sequential i/o is detected,
* always use direct sort instead of reverse sort.
*
* 4 Apr 1998 rev. 4.02 for linux 2.0.33 and 2.1.92
* io_port is now unsigned long.
*
* 17 Mar 1998 rev. 4.01 for linux 2.0.33 and 2.1.88
* Use new scsi error handling code (if linux version >= 2.1.88).
* Use new interrupt code.
*
* 12 Sep 1997 rev. 3.11 for linux 2.0.30 and 2.1.55
* Use of udelay inside the wait loops to avoid timeout
* problems with fast cpus.
* Removed check about useless calls to the interrupt service
* routine (reported on SMP systems only).
* At initialization time "sorted/unsorted" is displayed instead
* of "linked/unlinked" to reinforce the fact that "linking" is
* nothing but "elevator sorting" in the actual implementation.
*
* 17 May 1997 rev. 3.10 for linux 2.0.30 and 2.1.38
* Use of serial_number_at_timeout in abort and reset processing.
* Use of the __initfunc and __initdata macro in setup code.
* Minor cleanups in the list_statistics code.
* Increased controller busy timeout in order to better support
* slow SCSI devices.
*
* 24 Feb 1997 rev. 3.00 for linux 2.0.29 and 2.1.26
* When loading as a module, parameter passing is now supported
* both in 2.0 and in 2.1 style.
* Fixed data transfer direction for some SCSI opcodes.
* Immediate acknowledge to request sense commands.
* Linked commands to each disk device are now reordered by elevator
* sorting. Rare cases in which reordering of write requests could
* cause wrong results are managed.
* Fixed spurious timeouts caused by long simple queue tag sequences.
* New command line option (tm:[0-3]) to choose the type of tags:
* 0 -> mixed (default); 1 -> simple; 2 -> head; 3 -> ordered.
*
* 18 Jan 1997 rev. 2.60 for linux 2.1.21 and 2.0.28
* Added command line options to enable/disable linked commands
* (lc:[y|n]), tagged commands (tc:[y|n]) and to set the max queue
* depth (mq:xx). Default is "eata=lc:n,tc:n,mq:16".
* Improved command linking.
* Documented how to setup RAID-0 with DPT SmartRAID boards.
*
* 8 Jan 1997 rev. 2.50 for linux 2.1.20 and 2.0.27
* Added linked command support.
* Improved detection of PCI boards using ISA base addresses.
*
* 3 Dec 1996 rev. 2.40 for linux 2.1.14 and 2.0.27
* Added support for tagged commands and queue depth adjustment.
*
* 22 Nov 1996 rev. 2.30 for linux 2.1.12 and 2.0.26
* When CONFIG_PCI is defined, BIOS32 is used to include in the
* list of i/o ports to be probed all the PCI SCSI controllers.
* The list of i/o ports to be probed can be overwritten by the
* "eata=port0,port1,...." boot command line option.
* Scatter/gather lists are now allocated by a number of kmalloc
* calls, in order to avoid the previous size limit of 64Kb.
*
* 16 Nov 1996 rev. 2.20 for linux 2.1.10 and 2.0.25
* Added support for EATA 2.0C, PCI, multichannel and wide SCSI.
*
* 27 Sep 1996 rev. 2.12 for linux 2.1.0
* Portability cleanups (virtual/bus addressing, little/big endian
* support).
*
* 09 Jul 1996 rev. 2.11 for linux 2.0.4
* Number of internal retries is now limited.
*
* 16 Apr 1996 rev. 2.10 for linux 1.3.90
* New argument "reset_flags" to the reset routine.
*
* 6 Jul 1995 rev. 2.01 for linux 1.3.7
* Update required by the new /proc/scsi support.
*
* 11 Mar 1995 rev. 2.00 for linux 1.2.0
* Fixed a bug which prevented media change detection for removable
* disk drives.
*
* 23 Feb 1995 rev. 1.18 for linux 1.1.94
* Added a check for scsi_register returning NULL.
*
* 11 Feb 1995 rev. 1.17 for linux 1.1.91
* Now DEBUG_RESET is disabled by default.
* Register a board even if it does not assert DMA protocol support
* (DPT SK2011B does not report correctly the dmasup bit).
*
* 9 Feb 1995 rev. 1.16 for linux 1.1.90
* Use host->wish_block instead of host->block.
* New list of Data Out SCSI commands.
*
* 8 Feb 1995 rev. 1.15 for linux 1.1.89
* Cleared target_time_out counter while performing a reset.
* All external symbols renamed to avoid possible name conflicts.
*
* 28 Jan 1995 rev. 1.14 for linux 1.1.86
* Added module support.
* Log and do a retry when a disk drive returns a target status
* different from zero on a recovered error.
*
* 24 Jan 1995 rev. 1.13 for linux 1.1.85
* Use optimized board configuration, with a measured performance
* increase in the range 10%-20% on i/o throughput.
*
* 16 Jan 1995 rev. 1.12 for linux 1.1.81
* Fix mscp structure comments (no functional change).
* Display a message if check_region detects a port address
* already in use.
*
* 17 Dec 1994 rev. 1.11 for linux 1.1.74
* Use the scsicam_bios_param routine. This allows an easy
* migration path from disk partition tables created using
* different SCSI drivers and non optimal disk geometry.
*
* 15 Dec 1994 rev. 1.10 for linux 1.1.74
* Added support for ISA EATA boards (DPT PM2011, DPT PM2021).
* The host->block flag is set for all the detected ISA boards.
* The detect routine no longer enforces LEVEL triggering
* for EISA boards, it just prints a warning message.
*
* 30 Nov 1994 rev. 1.09 for linux 1.1.68
* Redo i/o on target status CHECK_CONDITION for TYPE_DISK only.
* Added optional support for using a single board at a time.
*
* 18 Nov 1994 rev. 1.08 for linux 1.1.64
* Forces sg_tablesize = 64 and can_queue = 64 if these
* values are not correctly detected (DPT PM2012).
*
* 14 Nov 1994 rev. 1.07 for linux 1.1.63 Final BETA release.
* 04 Aug 1994 rev. 1.00 for linux 1.1.39 First BETA release.
*
*
* This driver is based on the CAM (Common Access Method Committee)
* EATA (Enhanced AT Bus Attachment) rev. 2.0A, using DMA protocol.
*
* Copyright (C) 1994-2003 Dario Ballabio ([email protected])
*
* Alternate email: [email protected], [email protected]
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that redistributions of source
* code retain the above copyright notice and this comment without
* modification.
*
*/
/*
*
* Here is a brief description of the DPT SCSI host adapters.
* All these boards provide an EATA/DMA compatible programming interface
* and are fully supported by this driver in any configuration, including
* multiple SCSI channels:
*
* PM2011B/9X - Entry Level ISA
* PM2021A/9X - High Performance ISA
* PM2012A Old EISA
* PM2012B Old EISA
* PM2022A/9X - Entry Level EISA
* PM2122A/9X - High Performance EISA
* PM2322A/9X - Extra High Performance EISA
* PM3021 - SmartRAID Adapter for ISA
* PM3222 - SmartRAID Adapter for EISA (PM3222W is 16-bit wide SCSI)
* PM3224 - SmartRAID Adapter for PCI (PM3224W is 16-bit wide SCSI)
* PM33340UW - SmartRAID Adapter for PCI ultra wide multichannel
*
* The above list is just an indication: as a matter of fact all DPT
* boards using the EATA/DMA protocol are supported by this driver,
* since they use exactely the same programming interface.
*
* The DPT PM2001 provides only the EATA/PIO interface and hence is not
* supported by this driver.
*
* This code has been tested with up to 3 Distributed Processing Technology
* PM2122A/9X (DPT SCSI BIOS v002.D1, firmware v05E.0) EISA controllers,
* in any combination of private and shared IRQ.
* PCI support has been tested using up to 2 DPT PM3224W (DPT SCSI BIOS
* v003.D0, firmware v07G.0).
*
* DPT SmartRAID boards support "Hardware Array" - a group of disk drives
* which are all members of the same RAID-0, RAID-1 or RAID-5 array implemented
* in host adapter hardware. Hardware Arrays are fully compatible with this
* driver, since they look to it as a single disk drive.
*
* WARNING: to create a RAID-0 "Hardware Array" you must select "Other Unix"
* as the current OS in the DPTMGR "Initial System Installation" menu.
* Otherwise RAID-0 is generated as an "Array Group" (i.e. software RAID-0),
* which is not supported by the actual SCSI subsystem.
* To get the "Array Group" functionality, the Linux MD driver must be used
* instead of the DPT "Array Group" feature.
*
* Multiple ISA, EISA and PCI boards can be configured in the same system.
* It is suggested to put all the EISA boards on the same IRQ level, all
* the PCI boards on another IRQ level, while ISA boards cannot share
* interrupts.
*
* If you configure multiple boards on the same IRQ, the interrupt must
* be _level_ triggered (not _edge_ triggered).
*
* This driver detects EATA boards by probes at fixed port addresses,
* so no BIOS32 or PCI BIOS support is required.
* The suggested way to detect a generic EATA PCI board is to force on it
* any unused EISA address, even if there are other controllers on the EISA
* bus, or even if you system has no EISA bus at all.
* Do not force any ISA address on EATA PCI boards.
*
* If PCI bios support is configured into the kernel, BIOS32 is used to
* include in the list of i/o ports to be probed all the PCI SCSI controllers.
*
* Due to a DPT BIOS "feature", it might not be possible to force an EISA
* address on more than a single DPT PCI board, so in this case you have to
* let the PCI BIOS assign the addresses.
*
* The sequence of detection probes is:
*
* - ISA 0x1F0;
* - PCI SCSI controllers (only if BIOS32 is available);
* - EISA/PCI 0x1C88 through 0xFC88 (corresponding to EISA slots 1 to 15);
* - ISA 0x170, 0x230, 0x330.
*
* The above list of detection probes can be totally replaced by the
* boot command line option: "eata=port0,port1,port2,...", where the
* port0, port1... arguments are ISA/EISA/PCI addresses to be probed.
* For example using "eata=0x7410,0x7450,0x230", the driver probes
* only the two PCI addresses 0x7410 and 0x7450 and the ISA address 0x230,
* in this order; "eata=0" totally disables this driver.
*
* After the optional list of detection probes, other possible command line
* options are:
*
* et:y force use of extended translation (255 heads, 63 sectors);
* et:n use disk geometry detected by scsicam_bios_param;
* rs:y reverse scan order while detecting PCI boards;
* rs:n use BIOS order while detecting PCI boards;
* lc:y enables linked commands;
* lc:n disables linked commands;
* tm:0 disables tagged commands (same as tc:n);
* tm:1 use simple queue tags (same as tc:y);
* tm:2 use ordered queue tags (same as tc:2);
* mq:xx set the max queue depth to the value xx (2 <= xx <= 32).
*
* The default value is: "eata=lc:n,mq:16,tm:0,et:n,rs:n".
* An example using the list of detection probes could be:
* "eata=0x7410,0x230,lc:y,tm:2,mq:4,et:n".
*
* When loading as a module, parameters can be specified as well.
* The above example would be (use 1 in place of y and 0 in place of n):
*
* modprobe eata io_port=0x7410,0x230 linked_comm=1 \
* max_queue_depth=4 ext_tran=0 tag_mode=2 \
* rev_scan=1
*
* ----------------------------------------------------------------------------
* In this implementation, linked commands are designed to work with any DISK
* or CD-ROM, since this linking has only the intent of clustering (time-wise)
* and reordering by elevator sorting commands directed to each device,
* without any relation with the actual SCSI protocol between the controller
* and the device.
* If Q is the queue depth reported at boot time for each device (also named
* cmds/lun) and Q > 2, whenever there is already an active command to the
* device all other commands to the same device (up to Q-1) are kept waiting
* in the elevator sorting queue. When the active command completes, the
* commands in this queue are sorted by sector address. The sort is chosen
* between increasing or decreasing by minimizing the seek distance between
* the sector of the commands just completed and the sector of the first
* command in the list to be sorted.
* Trivial math assures that the unsorted average seek distance when doing
* random seeks over S sectors is S/3.
* When (Q-1) requests are uniformly distributed over S sectors, the average
* distance between two adjacent requests is S/((Q-1) + 1), so the sorted
* average seek distance for (Q-1) random requests over S sectors is S/Q.
* The elevator sorting hence divides the seek distance by a factor Q/3.
* The above pure geometric remarks are valid in all cases and the
* driver effectively reduces the seek distance by the predicted factor
* when there are Q concurrent read i/o operations on the device, but this
* does not necessarily results in a noticeable performance improvement:
* your mileage may vary....
*
* Note: command reordering inside a batch of queued commands could cause
* wrong results only if there is at least one write request and the
* intersection (sector-wise) of all requests is not empty.
* When the driver detects a batch including overlapping requests
* (a really rare event) strict serial (pid) order is enforced.
* ----------------------------------------------------------------------------
* The extended translation option (et:y) is useful when using large physical
* disks/arrays. It could also be useful when switching between Adaptec boards
* and DPT boards without reformatting the disk.
* When a boot disk is partitioned with extended translation, in order to
* be able to boot it with a DPT board is could be necessary to add to
* lilo.conf additional commands as in the following example:
*
* fix-table
* disk=/dev/sda bios=0x80 sectors=63 heads=128 cylindres=546
*
* where the above geometry should be replaced with the one reported at
* power up by the DPT controller.
* ----------------------------------------------------------------------------
*
* The boards are named EATA0, EATA1,... according to the detection order.
*
* In order to support multiple ISA boards in a reliable way,
* the driver sets host->wish_block = 1 for all ISA boards.
*/
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/proc_fs.h>
#include <linux/blkdev.h>
#include <linux/interrupt.h>
#include <linux/stat.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/ctype.h>
#include <linux/spinlock.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <asm/byteorder.h>
#include <asm/dma.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsicam.h>
static int eata2x_detect(struct scsi_host_template *);
static int eata2x_release(struct Scsi_Host *);
static int eata2x_queuecommand(struct Scsi_Host *, struct scsi_cmnd *);
static int eata2x_eh_abort(struct scsi_cmnd *);
static int eata2x_eh_host_reset(struct scsi_cmnd *);
static int eata2x_bios_param(struct scsi_device *, struct block_device *,
sector_t, int *);
static int eata2x_slave_configure(struct scsi_device *);
static struct scsi_host_template driver_template = {
.name = "EATA/DMA 2.0x rev. 8.10.00 ",
.detect = eata2x_detect,
.release = eata2x_release,
.queuecommand = eata2x_queuecommand,
.eh_abort_handler = eata2x_eh_abort,
.eh_host_reset_handler = eata2x_eh_host_reset,
.bios_param = eata2x_bios_param,
.slave_configure = eata2x_slave_configure,
.this_id = 7,
.unchecked_isa_dma = 1,
.use_clustering = ENABLE_CLUSTERING,
};
#if !defined(__BIG_ENDIAN_BITFIELD) && !defined(__LITTLE_ENDIAN_BITFIELD)
#error "Adjust your <asm/byteorder.h> defines"
#endif
/* Subversion values */
#define ISA 0
#define ESA 1
#undef FORCE_CONFIG
#undef DEBUG_LINKED_COMMANDS
#undef DEBUG_DETECT
#undef DEBUG_PCI_DETECT
#undef DEBUG_INTERRUPT
#undef DEBUG_RESET
#undef DEBUG_GENERATE_ERRORS
#undef DEBUG_GENERATE_ABORTS
#undef DEBUG_GEOMETRY
#define MAX_ISA 4
#define MAX_VESA 0
#define MAX_EISA 15
#define MAX_PCI 16
#define MAX_BOARDS (MAX_ISA + MAX_VESA + MAX_EISA + MAX_PCI)
#define MAX_CHANNEL 4
#define MAX_LUN 32
#define MAX_TARGET 32
#define MAX_MAILBOXES 64
#define MAX_SGLIST 64
#define MAX_LARGE_SGLIST 122
#define MAX_INTERNAL_RETRIES 64
#define MAX_CMD_PER_LUN 2
#define MAX_TAGGED_CMD_PER_LUN (MAX_MAILBOXES - MAX_CMD_PER_LUN)
#define SKIP ULONG_MAX
#define FREE 0
#define IN_USE 1
#define LOCKED 2
#define IN_RESET 3
#define IGNORE 4
#define READY 5
#define ABORTING 6
#define NO_DMA 0xff
#define MAXLOOP 10000
#define TAG_DISABLED 0
#define TAG_SIMPLE 1
#define TAG_ORDERED 2
#define REG_CMD 7
#define REG_STATUS 7
#define REG_AUX_STATUS 8
#define REG_DATA 0
#define REG_DATA2 1
#define REG_SEE 6
#define REG_LOW 2
#define REG_LM 3
#define REG_MID 4
#define REG_MSB 5
#define REGION_SIZE 9UL
#define MAX_ISA_ADDR 0x03ff
#define MIN_EISA_ADDR 0x1c88
#define MAX_EISA_ADDR 0xfc88
#define BSY_ASSERTED 0x80
#define DRQ_ASSERTED 0x08
#define ABSY_ASSERTED 0x01
#define IRQ_ASSERTED 0x02
#define READ_CONFIG_PIO 0xf0
#define SET_CONFIG_PIO 0xf1
#define SEND_CP_PIO 0xf2
#define RECEIVE_SP_PIO 0xf3
#define TRUNCATE_XFR_PIO 0xf4
#define RESET_PIO 0xf9
#define READ_CONFIG_DMA 0xfd
#define SET_CONFIG_DMA 0xfe
#define SEND_CP_DMA 0xff
#define ASOK 0x00
#define ASST 0x01
#define YESNO(a) ((a) ? 'y' : 'n')
#define TLDEV(type) ((type) == TYPE_DISK || (type) == TYPE_ROM)
/* "EATA", in Big Endian format */
#define EATA_SIG_BE 0x45415441
/* Number of valid bytes in the board config structure for EATA 2.0x */
#define EATA_2_0A_SIZE 28
#define EATA_2_0B_SIZE 30
#define EATA_2_0C_SIZE 34
/* Board info structure */
struct eata_info {
u_int32_t data_len; /* Number of valid bytes after this field */
u_int32_t sign; /* ASCII "EATA" signature */
#if defined(__BIG_ENDIAN_BITFIELD)
unchar version : 4,
: 4;
unchar haaval : 1,
ata : 1,
drqvld : 1,
dmasup : 1,
morsup : 1,
trnxfr : 1,
tarsup : 1,
ocsena : 1;
#else
unchar : 4, /* unused low nibble */
version : 4; /* EATA version, should be 0x1 */
unchar ocsena : 1, /* Overlap Command Support Enabled */
tarsup : 1, /* Target Mode Supported */
trnxfr : 1, /* Truncate Transfer Cmd NOT Necessary */
morsup : 1, /* More Supported */
dmasup : 1, /* DMA Supported */
drqvld : 1, /* DRQ Index (DRQX) is valid */
ata : 1, /* This is an ATA device */
haaval : 1; /* Host Adapter Address Valid */
#endif
ushort cp_pad_len; /* Number of pad bytes after cp_len */
unchar host_addr[4]; /* Host Adapter SCSI ID for channels 3, 2, 1, 0 */
u_int32_t cp_len; /* Number of valid bytes in cp */
u_int32_t sp_len; /* Number of valid bytes in sp */
ushort queue_size; /* Max number of cp that can be queued */
ushort unused;
ushort scatt_size; /* Max number of entries in scatter/gather table */
#if defined(__BIG_ENDIAN_BITFIELD)
unchar drqx : 2,
second : 1,
irq_tr : 1,
irq : 4;
unchar sync;
unchar : 4,
res1 : 1,
large_sg : 1,
forcaddr : 1,
isaena : 1;
unchar max_chan : 3,
max_id : 5;
unchar max_lun;
unchar eisa : 1,
pci : 1,
idquest : 1,
m1 : 1,
: 4;
#else
unchar irq : 4, /* Interrupt Request assigned to this controller */
irq_tr : 1, /* 0 for edge triggered, 1 for level triggered */
second : 1, /* 1 if this is a secondary (not primary) controller */
drqx : 2; /* DRQ Index (0=DMA0, 1=DMA7, 2=DMA6, 3=DMA5) */
unchar sync; /* 1 if scsi target id 7...0 is running sync scsi */
/* Structure extension defined in EATA 2.0B */
unchar isaena : 1, /* ISA i/o addressing is disabled/enabled */
forcaddr : 1, /* Port address has been forced */
large_sg : 1, /* 1 if large SG lists are supported */
res1 : 1,
: 4;
unchar max_id : 5, /* Max SCSI target ID number */
max_chan : 3; /* Max SCSI channel number on this board */
/* Structure extension defined in EATA 2.0C */
unchar max_lun; /* Max SCSI LUN number */
unchar
: 4,
m1 : 1, /* This is a PCI with an M1 chip installed */
idquest : 1, /* RAIDNUM returned is questionable */
pci : 1, /* This board is PCI */
eisa : 1; /* This board is EISA */
#endif
unchar raidnum; /* Uniquely identifies this HBA in a system */
unchar notused;
ushort ipad[247];
};
/* Board config structure */
struct eata_config {
ushort len; /* Number of bytes following this field */
#if defined(__BIG_ENDIAN_BITFIELD)
unchar : 4,
tarena : 1,
mdpena : 1,
ocena : 1,
edis : 1;
#else
unchar edis : 1, /* Disable EATA interface after config command */
ocena : 1, /* Overlapped Commands Enabled */
mdpena : 1, /* Transfer all Modified Data Pointer Messages */
tarena : 1, /* Target Mode Enabled for this controller */
: 4;
#endif
unchar cpad[511];
};
/* Returned status packet structure */
struct mssp {
#if defined(__BIG_ENDIAN_BITFIELD)
unchar eoc : 1,
adapter_status : 7;
#else
unchar adapter_status : 7, /* State related to current command */
eoc : 1; /* End Of Command (1 = command completed) */
#endif
unchar target_status; /* SCSI status received after data transfer */
unchar unused[2];
u_int32_t inv_res_len; /* Number of bytes not transferred */
u_int32_t cpp_index; /* Index of address set in cp */
char mess[12];
};
struct sg_list {
unsigned int address; /* Segment Address */
unsigned int num_bytes; /* Segment Length */
};
/* MailBox SCSI Command Packet */
struct mscp {
#if defined(__BIG_ENDIAN_BITFIELD)
unchar din : 1,
dout : 1,
interp : 1,
: 1,
sg : 1,
reqsen :1,
init : 1,
sreset : 1;
unchar sense_len;
unchar unused[3];
unchar : 7,
fwnest : 1;
unchar : 5,
hbaci : 1,
iat : 1,
phsunit : 1;
unchar channel : 3,
target : 5;
unchar one : 1,
dispri : 1,
luntar : 1,
lun : 5;
#else
unchar sreset :1, /* SCSI Bus Reset Signal should be asserted */
init :1, /* Re-initialize controller and self test */
reqsen :1, /* Transfer Request Sense Data to addr using DMA */
sg :1, /* Use Scatter/Gather */
:1,
interp :1, /* The controller interprets cp, not the target */
dout :1, /* Direction of Transfer is Out (Host to Target) */
din :1; /* Direction of Transfer is In (Target to Host) */
unchar sense_len; /* Request Sense Length */
unchar unused[3];
unchar fwnest : 1, /* Send command to a component of an Array Group */
: 7;
unchar phsunit : 1, /* Send to Target Physical Unit (bypass RAID) */
iat : 1, /* Inhibit Address Translation */
hbaci : 1, /* Inhibit HBA Caching for this command */
: 5;
unchar target : 5, /* SCSI target ID */
channel : 3; /* SCSI channel number */
unchar lun : 5, /* SCSI logical unit number */
luntar : 1, /* This cp is for Target (not LUN) */
dispri : 1, /* Disconnect Privilege granted */
one : 1; /* 1 */
#endif
unchar mess[3]; /* Massage to/from Target */
unchar cdb[12]; /* Command Descriptor Block */
u_int32_t data_len; /* If sg=0 Data Length, if sg=1 sglist length */
u_int32_t cpp_index; /* Index of address to be returned in sp */
u_int32_t data_address; /* If sg=0 Data Address, if sg=1 sglist address */
u_int32_t sp_dma_addr; /* Address where sp is DMA'ed when cp completes */
u_int32_t sense_addr; /* Address where Sense Data is DMA'ed on error */
/* Additional fields begin here. */
struct scsi_cmnd *SCpnt;
/* All the cp structure is zero filled by queuecommand except the
following CP_TAIL_SIZE bytes, initialized by detect */
dma_addr_t cp_dma_addr; /* dma handle for this cp structure */
struct sg_list *sglist; /* pointer to the allocated SG list */
};
#define CP_TAIL_SIZE (sizeof(struct sglist *) + sizeof(dma_addr_t))
struct hostdata {
struct mscp cp[MAX_MAILBOXES]; /* Mailboxes for this board */
unsigned int cp_stat[MAX_MAILBOXES]; /* FREE, IN_USE, LOCKED, IN_RESET */
unsigned int last_cp_used; /* Index of last mailbox used */
unsigned int iocount; /* Total i/o done for this board */
int board_number; /* Number of this board */
char board_name[16]; /* Name of this board */
int in_reset; /* True if board is doing a reset */
int target_to[MAX_TARGET][MAX_CHANNEL]; /* N. of timeout errors on target */
int target_redo[MAX_TARGET][MAX_CHANNEL]; /* If 1 redo i/o on target */
unsigned int retries; /* Number of internal retries */
unsigned long last_retried_pid; /* Pid of last retried command */
unsigned char subversion; /* Bus type, either ISA or EISA/PCI */
unsigned char protocol_rev; /* EATA 2.0 rev., 'A' or 'B' or 'C' */
unsigned char is_pci; /* 1 is bus type is PCI */
struct pci_dev *pdev; /* pdev for PCI bus, NULL otherwise */
struct mssp *sp_cpu_addr; /* cpu addr for DMA buffer sp */
dma_addr_t sp_dma_addr; /* dma handle for DMA buffer sp */
struct mssp sp; /* Local copy of sp buffer */
};
static struct Scsi_Host *sh[MAX_BOARDS];
static const char *driver_name = "EATA";
static char sha[MAX_BOARDS];
/* Initialize num_boards so that ihdlr can work while detect is in progress */
static unsigned int num_boards = MAX_BOARDS;
static unsigned long io_port[] = {
/* Space for MAX_INT_PARAM ports usable while loading as a module */
SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP,
SKIP, SKIP,
/* First ISA */
0x1f0,
/* Space for MAX_PCI ports possibly reported by PCI_BIOS */
SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP,
SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP, SKIP,
/* MAX_EISA ports */
0x1c88, 0x2c88, 0x3c88, 0x4c88, 0x5c88, 0x6c88, 0x7c88, 0x8c88,
0x9c88, 0xac88, 0xbc88, 0xcc88, 0xdc88, 0xec88, 0xfc88,
/* Other (MAX_ISA - 1) ports */
0x170, 0x230, 0x330,
/* End of list */
0x0
};
/* Device is Big Endian */
#define H2DEV(x) cpu_to_be32(x)
#define DEV2H(x) be32_to_cpu(x)
#define H2DEV16(x) cpu_to_be16(x)
#define DEV2H16(x) be16_to_cpu(x)
/* But transfer orientation from the 16 bit data register is Little Endian */
#define REG2H(x) le16_to_cpu(x)
static irqreturn_t do_interrupt_handler(int, void *);
static void flush_dev(struct scsi_device *, unsigned long, struct hostdata *,
unsigned int);
static int do_trace = 0;
static int setup_done = 0;
static int link_statistics;
static int ext_tran = 0;
static int rev_scan = 1;
#if defined(CONFIG_SCSI_EATA_TAGGED_QUEUE)
static int tag_mode = TAG_SIMPLE;
#else
static int tag_mode = TAG_DISABLED;
#endif
#if defined(CONFIG_SCSI_EATA_LINKED_COMMANDS)
static int linked_comm = 1;
#else
static int linked_comm = 0;
#endif
#if defined(CONFIG_SCSI_EATA_MAX_TAGS)
static int max_queue_depth = CONFIG_SCSI_EATA_MAX_TAGS;
#else
static int max_queue_depth = MAX_CMD_PER_LUN;
#endif
#if defined(CONFIG_ISA)
static int isa_probe = 1;
#else
static int isa_probe = 0;
#endif
#if defined(CONFIG_EISA)
static int eisa_probe = 1;
#else
static int eisa_probe = 0;
#endif
#if defined(CONFIG_PCI)
static int pci_probe = 1;
#else
static int pci_probe = 0;
#endif
#define MAX_INT_PARAM 10
#define MAX_BOOT_OPTIONS_SIZE 256
static char boot_options[MAX_BOOT_OPTIONS_SIZE];
#if defined(MODULE)
#include <linux/module.h>
#include <linux/moduleparam.h>
module_param_string(eata, boot_options, MAX_BOOT_OPTIONS_SIZE, 0);
MODULE_PARM_DESC(eata, " equivalent to the \"eata=...\" kernel boot option."
" Example: modprobe eata \"eata=0x7410,0x230,lc:y,tm:0,mq:4,ep:n\"");
MODULE_AUTHOR("Dario Ballabio");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("EATA/DMA SCSI Driver");
#endif
static int eata2x_slave_configure(struct scsi_device *dev)
{
int tqd, utqd;
char *tag_suffix, *link_suffix;
utqd = MAX_CMD_PER_LUN;
tqd = max_queue_depth;
if (TLDEV(dev->type) && dev->tagged_supported) {
if (tag_mode == TAG_SIMPLE) {
tag_suffix = ", simple tags";
} else if (tag_mode == TAG_ORDERED) {
tag_suffix = ", ordered tags";
} else {
tag_suffix = ", no tags";
}
scsi_change_queue_depth(dev, tqd);
} else if (TLDEV(dev->type) && linked_comm) {
scsi_change_queue_depth(dev, tqd);
tag_suffix = ", untagged";
} else {
scsi_change_queue_depth(dev, utqd);
tag_suffix = "";
}
if (TLDEV(dev->type) && linked_comm && dev->queue_depth > 2)
link_suffix = ", sorted";
else if (TLDEV(dev->type))
link_suffix = ", unsorted";
else
link_suffix = "";
sdev_printk(KERN_INFO, dev,
"cmds/lun %d%s%s.\n",
dev->queue_depth, link_suffix, tag_suffix);
return 0;
}
static int wait_on_busy(unsigned long iobase, unsigned int loop)
{
while (inb(iobase + REG_AUX_STATUS) & ABSY_ASSERTED) {
udelay(1L);
if (--loop == 0)
return 1;
}
return 0;
}
static int do_dma(unsigned long iobase, unsigned long addr, unchar cmd)
{
unsigned char *byaddr;
unsigned long devaddr;
if (wait_on_busy(iobase, (addr ? MAXLOOP * 100 : MAXLOOP)))
return 1;
if (addr) {
devaddr = H2DEV(addr);
byaddr = (unsigned char *)&devaddr;
outb(byaddr[3], iobase + REG_LOW);
outb(byaddr[2], iobase + REG_LM);