forked from openbmc/linux
-
Notifications
You must be signed in to change notification settings - Fork 5
/
Copy path3w-xxxx.c
2461 lines (2096 loc) · 83.9 KB
/
3w-xxxx.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
/*
3w-xxxx.c -- 3ware Storage Controller device driver for Linux.
Written By: Adam Radford <linuxraid@lsi.com>
Modifications By: Joel Jacobson <linux@3ware.com>
Arnaldo Carvalho de Melo <acme@conectiva.com.br>
Brad Strand <linux@3ware.com>
Copyright (C) 1999-2010 3ware Inc.
Kernel compatibility By: Andre Hedrick <andre@suse.com>
Non-Copyright (C) 2000 Andre Hedrick <andre@suse.com>
Further tiny build fixes and trivial hoovering Alan Cox
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
NO WARRANTY
THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
solely responsible for determining the appropriateness of using and
distributing the Program and assumes all risks associated with its
exercise of rights under this Agreement, including but not limited to
the risks and costs of program errors, damage to or loss of data,
programs or equipment, and unavailability or interruption of operations.
DISCLAIMER OF LIABILITY
NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Bugs/Comments/Suggestions should be mailed to:
linuxraid@lsi.com
For more information, goto:
http://www.lsi.com
History
-------
0.1.000 - Initial release.
0.4.000 - Added support for Asynchronous Event Notification through
ioctls for 3DM.
1.0.000 - Added DPO & FUA bit support for WRITE_10 & WRITE_6 cdb
to disable drive write-cache before writes.
1.1.000 - Fixed performance bug with DPO & FUA not existing for WRITE_6.
1.2.000 - Added support for clean shutdown notification/feature table.
1.02.00.001 - Added support for full command packet posts through ioctls
for 3DM.
Bug fix so hot spare drives don't show up.
1.02.00.002 - Fix bug with tw_setfeature() call that caused oops on some
systems.
08/21/00 - release previously allocated resources on failure at
tw_allocate_memory (acme)
1.02.00.003 - Fix tw_interrupt() to report error to scsi layer when
controller status is non-zero.
Added handling of request_sense opcode.
Fix possible null pointer dereference in
tw_reset_device_extension()
1.02.00.004 - Add support for device id of 3ware 7000 series controllers.
Make tw_setfeature() call with interrupts disabled.
Register interrupt handler before enabling interrupts.
Clear attention interrupt before draining aen queue.
1.02.00.005 - Allocate bounce buffers and custom queue depth for raid5 for
6000 and 5000 series controllers.
Reduce polling mdelays causing problems on some systems.
Fix use_sg = 1 calculation bug.
Check for scsi_register returning NULL.
Add aen count to /proc/scsi/3w-xxxx.
Remove aen code unit masking in tw_aen_complete().
1.02.00.006 - Remove unit from printk in tw_scsi_eh_abort(), causing
possible oops.
Fix possible null pointer dereference in tw_scsi_queue()
if done function pointer was invalid.
1.02.00.007 - Fix possible null pointer dereferences in tw_ioctl().
Remove check for invalid done function pointer from
tw_scsi_queue().
1.02.00.008 - Set max sectors per io to TW_MAX_SECTORS in tw_findcards().
Add tw_decode_error() for printing readable error messages.
Print some useful information on certain aen codes.
Add tw_decode_bits() for interpreting status register output.
Make scsi_set_pci_device() for kernels >= 2.4.4
Fix bug where aen's could be lost before a reset.
Re-add spinlocks in tw_scsi_detect().
Fix possible null pointer dereference in tw_aen_drain_queue()
during initialization.
Clear pci parity errors during initialization and during io.
1.02.00.009 - Remove redundant increment in tw_state_request_start().
Add ioctl support for direct ATA command passthru.
Add entire aen code string list.
1.02.00.010 - Cleanup queueing code, fix jbod thoughput.
Fix get_param for specific units.
1.02.00.011 - Fix bug in tw_aen_complete() where aen's could be lost.
Fix tw_aen_drain_queue() to display useful info at init.
Set tw_host->max_id for 12 port cards.
Add ioctl support for raw command packet post from userspace
with sglist fragments (parameter and io).
1.02.00.012 - Fix read capacity to under report by 1 sector to fix get
last sector ioctl.
1.02.00.013 - Fix bug where more AEN codes weren't coming out during
driver initialization.
Improved handling of PCI aborts.
1.02.00.014 - Fix bug in tw_findcards() where AEN code could be lost.
Increase timeout in tw_aen_drain_queue() to 30 seconds.
1.02.00.015 - Re-write raw command post with data ioctl method.
Remove raid5 bounce buffers for raid5 for 6XXX for kernel 2.5
Add tw_map/unmap_scsi_sg/single_data() for kernel 2.5
Replace io_request_lock with host_lock for kernel 2.5
Set max_cmd_len to 16 for 3dm for kernel 2.5
1.02.00.016 - Set host->max_sectors back up to 256.
1.02.00.017 - Modified pci parity error handling/clearing from config space
during initialization.
1.02.00.018 - Better handling of request sense opcode and sense information
for failed commands. Add tw_decode_sense().
Replace all mdelay()'s with scsi_sleep().
1.02.00.019 - Revert mdelay's and scsi_sleep's, this caused problems on
some SMP systems.
1.02.00.020 - Add pci_set_dma_mask(), rewrite kmalloc()/virt_to_bus() to
pci_alloc/free_consistent().
Better alignment checking in tw_allocate_memory().
Cleanup tw_initialize_device_extension().
1.02.00.021 - Bump cmd_per_lun in SHT to 255 for better jbod performance.
Improve handling of errors in tw_interrupt().
Add handling/clearing of controller queue error.
Empty stale responses before draining aen queue.
Fix tw_scsi_eh_abort() to not reset on every io abort.
Set can_queue in SHT to 255 to prevent hang from AEN.
1.02.00.022 - Fix possible null pointer dereference in tw_scsi_release().
1.02.00.023 - Fix bug in tw_aen_drain_queue() where unit # was always zero.
1.02.00.024 - Add severity levels to AEN strings.
1.02.00.025 - Fix command interrupt spurious error messages.
Fix bug in raw command post with data ioctl method.
Fix bug where rollcall sometimes failed with cable errors.
Print unit # on all command timeouts.
1.02.00.026 - Fix possible infinite retry bug with power glitch induced
drive timeouts.
Cleanup some AEN severity levels.
1.02.00.027 - Add drive not supported AEN code for SATA controllers.
Remove spurious unknown ioctl error message.
1.02.00.028 - Fix bug where multiple controllers with no units were the
same card number.
Fix bug where cards were being shut down more than once.
1.02.00.029 - Add missing pci_free_consistent() in tw_allocate_memory().
Replace pci_map_single() with pci_map_page() for highmem.
Check for tw_setfeature() failure.
1.02.00.030 - Make driver 64-bit clean.
1.02.00.031 - Cleanup polling timeouts/routines in several places.
Add support for mode sense opcode.
Add support for cache mode page.
Add support for synchronize cache opcode.
1.02.00.032 - Fix small multicard rollcall bug.
Make driver stay loaded with no units for hot add/swap.
Add support for "twe" character device for ioctls.
Clean up request_id queueing code.
Fix tw_scsi_queue() spinlocks.
1.02.00.033 - Fix tw_aen_complete() to not queue 'queue empty' AEN's.
Initialize queues correctly when loading with no valid units.
1.02.00.034 - Fix tw_decode_bits() to handle multiple errors.
Add support for user configurable cmd_per_lun.
Add support for sht->slave_configure().
1.02.00.035 - Improve tw_allocate_memory() memory allocation.
Fix tw_chrdev_ioctl() to sleep correctly.
1.02.00.036 - Increase character ioctl timeout to 60 seconds.
1.02.00.037 - Fix tw_ioctl() to handle all non-data ATA passthru cmds
for 'smartmontools' support.
1.26.00.038 - Roll driver minor version to 26 to denote kernel 2.6.
Add support for cmds_per_lun module parameter.
1.26.00.039 - Fix bug in tw_chrdev_ioctl() polling code.
Fix data_buffer_length usage in tw_chrdev_ioctl().
Update contact information.
1.26.02.000 - Convert driver to pci_driver format.
1.26.02.001 - Increase max ioctl buffer size to 512 sectors.
Make tw_scsi_queue() return 0 for 'Unknown scsi opcode'.
Fix tw_remove() to free irq handler/unregister_chrdev()
before shutting down card.
Change to new 'change_queue_depth' api.
Fix 'handled=1' ISR usage, remove bogus IRQ check.
1.26.02.002 - Free irq handler in __tw_shutdown().
Turn on RCD bit for caching mode page.
Serialize reset code.
1.26.02.003 - Force 60 second timeout default.
*/
#include <linux/module.h>
#include <linux/reboot.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/moduleparam.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/gfp.h>
#include <linux/pci.h>
#include <linux/time.h>
#include <linux/mutex.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_eh.h>
#include "3w-xxxx.h"
/* Globals */
#define TW_DRIVER_VERSION "1.26.02.003"
static DEFINE_MUTEX(tw_mutex);
static TW_Device_Extension *tw_device_extension_list[TW_MAX_SLOT];
static int tw_device_extension_count = 0;
static int twe_major = -1;
/* Module parameters */
MODULE_AUTHOR("LSI");
MODULE_DESCRIPTION("3ware Storage Controller Linux Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(TW_DRIVER_VERSION);
/* Function prototypes */
static int tw_reset_device_extension(TW_Device_Extension *tw_dev);
/* Functions */
/* This function will check the status register for unexpected bits */
static int tw_check_bits(u32 status_reg_value)
{
if ((status_reg_value & TW_STATUS_EXPECTED_BITS) != TW_STATUS_EXPECTED_BITS) {
dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): No expected bits (0x%x).\n", status_reg_value);
return 1;
}
if ((status_reg_value & TW_STATUS_UNEXPECTED_BITS) != 0) {
dprintk(KERN_WARNING "3w-xxxx: tw_check_bits(): Found unexpected bits (0x%x).\n", status_reg_value);
return 1;
}
return 0;
} /* End tw_check_bits() */
/* This function will print readable messages from status register errors */
static int tw_decode_bits(TW_Device_Extension *tw_dev, u32 status_reg_value, int print_host)
{
char host[16];
dprintk(KERN_WARNING "3w-xxxx: tw_decode_bits()\n");
if (print_host)
sprintf(host, " scsi%d:", tw_dev->host->host_no);
else
host[0] = '\0';
if (status_reg_value & TW_STATUS_PCI_PARITY_ERROR) {
printk(KERN_WARNING "3w-xxxx:%s PCI Parity Error: clearing.\n", host);
outl(TW_CONTROL_CLEAR_PARITY_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
}
if (status_reg_value & TW_STATUS_PCI_ABORT) {
printk(KERN_WARNING "3w-xxxx:%s PCI Abort: clearing.\n", host);
outl(TW_CONTROL_CLEAR_PCI_ABORT, TW_CONTROL_REG_ADDR(tw_dev));
pci_write_config_word(tw_dev->tw_pci_dev, PCI_STATUS, TW_PCI_CLEAR_PCI_ABORT);
}
if (status_reg_value & TW_STATUS_QUEUE_ERROR) {
printk(KERN_WARNING "3w-xxxx:%s Controller Queue Error: clearing.\n", host);
outl(TW_CONTROL_CLEAR_QUEUE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
}
if (status_reg_value & TW_STATUS_SBUF_WRITE_ERROR) {
printk(KERN_WARNING "3w-xxxx:%s SBUF Write Error: clearing.\n", host);
outl(TW_CONTROL_CLEAR_SBUF_WRITE_ERROR, TW_CONTROL_REG_ADDR(tw_dev));
}
if (status_reg_value & TW_STATUS_MICROCONTROLLER_ERROR) {
if (tw_dev->reset_print == 0) {
printk(KERN_WARNING "3w-xxxx:%s Microcontroller Error: clearing.\n", host);
tw_dev->reset_print = 1;
}
return 1;
}
return 0;
} /* End tw_decode_bits() */
/* This function will poll the status register for a flag */
static int tw_poll_status(TW_Device_Extension *tw_dev, u32 flag, int seconds)
{
u32 status_reg_value;
unsigned long before;
int retval = 1;
status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
before = jiffies;
if (tw_check_bits(status_reg_value))
tw_decode_bits(tw_dev, status_reg_value, 0);
while ((status_reg_value & flag) != flag) {
status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
if (tw_check_bits(status_reg_value))
tw_decode_bits(tw_dev, status_reg_value, 0);
if (time_after(jiffies, before + HZ * seconds))
goto out;
msleep(50);
}
retval = 0;
out:
return retval;
} /* End tw_poll_status() */
/* This function will poll the status register for disappearance of a flag */
static int tw_poll_status_gone(TW_Device_Extension *tw_dev, u32 flag, int seconds)
{
u32 status_reg_value;
unsigned long before;
int retval = 1;
status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
before = jiffies;
if (tw_check_bits(status_reg_value))
tw_decode_bits(tw_dev, status_reg_value, 0);
while ((status_reg_value & flag) != 0) {
status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
if (tw_check_bits(status_reg_value))
tw_decode_bits(tw_dev, status_reg_value, 0);
if (time_after(jiffies, before + HZ * seconds))
goto out;
msleep(50);
}
retval = 0;
out:
return retval;
} /* End tw_poll_status_gone() */
/* This function will attempt to post a command packet to the board */
static int tw_post_command_packet(TW_Device_Extension *tw_dev, int request_id)
{
u32 status_reg_value;
unsigned long command_que_value;
dprintk(KERN_NOTICE "3w-xxxx: tw_post_command_packet()\n");
command_que_value = tw_dev->command_packet_physical_address[request_id];
status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
if (tw_check_bits(status_reg_value)) {
dprintk(KERN_WARNING "3w-xxxx: tw_post_command_packet(): Unexpected bits.\n");
tw_decode_bits(tw_dev, status_reg_value, 1);
}
if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) {
/* We successfully posted the command packet */
outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
tw_dev->state[request_id] = TW_S_POSTED;
tw_dev->posted_request_count++;
if (tw_dev->posted_request_count > tw_dev->max_posted_request_count) {
tw_dev->max_posted_request_count = tw_dev->posted_request_count;
}
} else {
/* Couldn't post the command packet, so we do it in the isr */
if (tw_dev->state[request_id] != TW_S_PENDING) {
tw_dev->state[request_id] = TW_S_PENDING;
tw_dev->pending_request_count++;
if (tw_dev->pending_request_count > tw_dev->max_pending_request_count) {
tw_dev->max_pending_request_count = tw_dev->pending_request_count;
}
tw_dev->pending_queue[tw_dev->pending_tail] = request_id;
if (tw_dev->pending_tail == TW_Q_LENGTH-1) {
tw_dev->pending_tail = TW_Q_START;
} else {
tw_dev->pending_tail = tw_dev->pending_tail + 1;
}
}
TW_UNMASK_COMMAND_INTERRUPT(tw_dev);
return 1;
}
return 0;
} /* End tw_post_command_packet() */
/* This function will return valid sense buffer information for failed cmds */
static int tw_decode_sense(TW_Device_Extension *tw_dev, int request_id, int fill_sense)
{
int i;
TW_Command *command;
dprintk(KERN_WARNING "3w-xxxx: tw_decode_sense()\n");
command = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
printk(KERN_WARNING "3w-xxxx: scsi%d: Command failed: status = 0x%x, flags = 0x%x, unit #%d.\n", tw_dev->host->host_no, command->status, command->flags, TW_UNIT_OUT(command->unit__hostid));
/* Attempt to return intelligent sense information */
if (fill_sense) {
if ((command->status == 0xc7) || (command->status == 0xcb)) {
for (i = 0; i < ARRAY_SIZE(tw_sense_table); i++) {
if (command->flags == tw_sense_table[i][0]) {
/* Valid bit and 'current errors' */
tw_dev->srb[request_id]->sense_buffer[0] = (0x1 << 7 | 0x70);
/* Sense key */
tw_dev->srb[request_id]->sense_buffer[2] = tw_sense_table[i][1];
/* Additional sense length */
tw_dev->srb[request_id]->sense_buffer[7] = 0xa; /* 10 bytes */
/* Additional sense code */
tw_dev->srb[request_id]->sense_buffer[12] = tw_sense_table[i][2];
/* Additional sense code qualifier */
tw_dev->srb[request_id]->sense_buffer[13] = tw_sense_table[i][3];
tw_dev->srb[request_id]->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
return TW_ISR_DONT_RESULT; /* Special case for isr to not over-write result */
}
}
}
/* If no table match, error so we get a reset */
return 1;
}
return 0;
} /* End tw_decode_sense() */
/* This function will report controller error status */
static int tw_check_errors(TW_Device_Extension *tw_dev)
{
u32 status_reg_value;
status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
if (TW_STATUS_ERRORS(status_reg_value) || tw_check_bits(status_reg_value)) {
tw_decode_bits(tw_dev, status_reg_value, 0);
return 1;
}
return 0;
} /* End tw_check_errors() */
/* This function will empty the response que */
static void tw_empty_response_que(TW_Device_Extension *tw_dev)
{
u32 status_reg_value, response_que_value;
status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
while ((status_reg_value & TW_STATUS_RESPONSE_QUEUE_EMPTY) == 0) {
response_que_value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
}
} /* End tw_empty_response_que() */
/* This function will free a request_id */
static void tw_state_request_finish(TW_Device_Extension *tw_dev, int request_id)
{
tw_dev->free_queue[tw_dev->free_tail] = request_id;
tw_dev->state[request_id] = TW_S_FINISHED;
tw_dev->free_tail = (tw_dev->free_tail + 1) % TW_Q_LENGTH;
} /* End tw_state_request_finish() */
/* This function will assign an available request_id */
static void tw_state_request_start(TW_Device_Extension *tw_dev, int *request_id)
{
*request_id = tw_dev->free_queue[tw_dev->free_head];
tw_dev->free_head = (tw_dev->free_head + 1) % TW_Q_LENGTH;
tw_dev->state[*request_id] = TW_S_STARTED;
} /* End tw_state_request_start() */
/* Show some statistics about the card */
static ssize_t tw_show_stats(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct Scsi_Host *host = class_to_shost(dev);
TW_Device_Extension *tw_dev = (TW_Device_Extension *)host->hostdata;
unsigned long flags = 0;
ssize_t len;
spin_lock_irqsave(tw_dev->host->host_lock, flags);
len = snprintf(buf, PAGE_SIZE, "3w-xxxx Driver version: %s\n"
"Current commands posted: %4d\n"
"Max commands posted: %4d\n"
"Current pending commands: %4d\n"
"Max pending commands: %4d\n"
"Last sgl length: %4d\n"
"Max sgl length: %4d\n"
"Last sector count: %4d\n"
"Max sector count: %4d\n"
"SCSI Host Resets: %4d\n"
"AEN's: %4d\n",
TW_DRIVER_VERSION,
tw_dev->posted_request_count,
tw_dev->max_posted_request_count,
tw_dev->pending_request_count,
tw_dev->max_pending_request_count,
tw_dev->sgl_entries,
tw_dev->max_sgl_entries,
tw_dev->sector_count,
tw_dev->max_sector_count,
tw_dev->num_resets,
tw_dev->aen_count);
spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
return len;
} /* End tw_show_stats() */
/* This function will set a devices queue depth */
static int tw_change_queue_depth(struct scsi_device *sdev, int queue_depth,
int reason)
{
if (reason != SCSI_QDEPTH_DEFAULT)
return -EOPNOTSUPP;
if (queue_depth > TW_Q_LENGTH-2)
queue_depth = TW_Q_LENGTH-2;
scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth);
return queue_depth;
} /* End tw_change_queue_depth() */
/* Create sysfs 'stats' entry */
static struct device_attribute tw_host_stats_attr = {
.attr = {
.name = "stats",
.mode = S_IRUGO,
},
.show = tw_show_stats
};
/* Host attributes initializer */
static struct device_attribute *tw_host_attrs[] = {
&tw_host_stats_attr,
NULL,
};
/* This function will read the aen queue from the isr */
static int tw_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
{
TW_Command *command_packet;
TW_Param *param;
unsigned long command_que_value;
u32 status_reg_value;
unsigned long param_value = 0;
dprintk(KERN_NOTICE "3w-xxxx: tw_aen_read_queue()\n");
status_reg_value = inl(TW_STATUS_REG_ADDR(tw_dev));
if (tw_check_bits(status_reg_value)) {
dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Unexpected bits.\n");
tw_decode_bits(tw_dev, status_reg_value, 1);
return 1;
}
if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet virtual address.\n");
return 1;
}
command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
memset(command_packet, 0, sizeof(TW_Sector));
command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
command_packet->size = 4;
command_packet->request_id = request_id;
command_packet->status = 0;
command_packet->flags = 0;
command_packet->byte6.parameter_count = 1;
command_que_value = tw_dev->command_packet_physical_address[request_id];
if (command_que_value == 0) {
printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad command packet physical address.\n");
return 1;
}
/* Now setup the param */
if (tw_dev->alignment_virtual_address[request_id] == NULL) {
printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment virtual address.\n");
return 1;
}
param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
memset(param, 0, sizeof(TW_Sector));
param->table_id = 0x401; /* AEN table */
param->parameter_id = 2; /* Unit code */
param->parameter_size_bytes = 2;
param_value = tw_dev->alignment_physical_address[request_id];
if (param_value == 0) {
printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Bad alignment physical address.\n");
return 1;
}
command_packet->byte8.param.sgl[0].address = param_value;
command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
/* Now post the command packet */
if ((status_reg_value & TW_STATUS_COMMAND_QUEUE_FULL) == 0) {
dprintk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post succeeded.\n");
tw_dev->srb[request_id] = NULL; /* Flag internal command */
tw_dev->state[request_id] = TW_S_POSTED;
outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
} else {
printk(KERN_WARNING "3w-xxxx: tw_aen_read_queue(): Post failed, will retry.\n");
return 1;
}
return 0;
} /* End tw_aen_read_queue() */
/* This function will complete an aen request from the isr */
static int tw_aen_complete(TW_Device_Extension *tw_dev, int request_id)
{
TW_Param *param;
unsigned short aen;
int error = 0, table_max = 0;
dprintk(KERN_WARNING "3w-xxxx: tw_aen_complete()\n");
if (tw_dev->alignment_virtual_address[request_id] == NULL) {
printk(KERN_WARNING "3w-xxxx: tw_aen_complete(): Bad alignment virtual address.\n");
return 1;
}
param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
aen = *(unsigned short *)(param->data);
dprintk(KERN_NOTICE "3w-xxxx: tw_aen_complete(): Queue'd code 0x%x\n", aen);
/* Print some useful info when certain aen codes come out */
if (aen == 0x0ff) {
printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: INFO: AEN queue overflow.\n", tw_dev->host->host_no);
} else {
table_max = ARRAY_SIZE(tw_aen_string);
if ((aen & 0x0ff) < table_max) {
if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s%d.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff], aen >> 8);
} else {
if (aen != 0x0)
printk(KERN_WARNING "3w-xxxx: scsi%d: AEN: %s.\n", tw_dev->host->host_no, tw_aen_string[aen & 0xff]);
}
} else {
printk(KERN_WARNING "3w-xxxx: scsi%d: Received AEN %d.\n", tw_dev->host->host_no, aen);
}
}
if (aen != TW_AEN_QUEUE_EMPTY) {
tw_dev->aen_count++;
/* Now queue the code */
tw_dev->aen_queue[tw_dev->aen_tail] = aen;
if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
tw_dev->aen_tail = TW_Q_START;
} else {
tw_dev->aen_tail = tw_dev->aen_tail + 1;
}
if (tw_dev->aen_head == tw_dev->aen_tail) {
if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
tw_dev->aen_head = TW_Q_START;
} else {
tw_dev->aen_head = tw_dev->aen_head + 1;
}
}
error = tw_aen_read_queue(tw_dev, request_id);
if (error) {
printk(KERN_WARNING "3w-xxxx: scsi%d: Error completing AEN.\n", tw_dev->host->host_no);
tw_dev->state[request_id] = TW_S_COMPLETED;
tw_state_request_finish(tw_dev, request_id);
}
} else {
tw_dev->state[request_id] = TW_S_COMPLETED;
tw_state_request_finish(tw_dev, request_id);
}
return 0;
} /* End tw_aen_complete() */
/* This function will drain the aen queue after a soft reset */
static int tw_aen_drain_queue(TW_Device_Extension *tw_dev)
{
TW_Command *command_packet;
TW_Param *param;
int request_id = 0;
unsigned long command_que_value;
unsigned long param_value;
TW_Response_Queue response_queue;
unsigned short aen;
unsigned short aen_code;
int finished = 0;
int first_reset = 0;
int queue = 0;
int found = 0, table_max = 0;
dprintk(KERN_NOTICE "3w-xxxx: tw_aen_drain_queue()\n");
if (tw_poll_status(tw_dev, TW_STATUS_ATTENTION_INTERRUPT | TW_STATUS_MICROCONTROLLER_READY, 30)) {
dprintk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): No attention interrupt for card %d.\n", tw_device_extension_count);
return 1;
}
TW_CLEAR_ATTENTION_INTERRUPT(tw_dev);
/* Empty response queue */
tw_empty_response_que(tw_dev);
/* Initialize command packet */
if (tw_dev->command_packet_virtual_address[request_id] == NULL) {
printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet virtual address.\n");
return 1;
}
command_packet = (TW_Command *)tw_dev->command_packet_virtual_address[request_id];
memset(command_packet, 0, sizeof(TW_Sector));
command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
command_packet->size = 4;
command_packet->request_id = request_id;
command_packet->status = 0;
command_packet->flags = 0;
command_packet->byte6.parameter_count = 1;
command_que_value = tw_dev->command_packet_physical_address[request_id];
if (command_que_value == 0) {
printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad command packet physical address.\n");
return 1;
}
/* Now setup the param */
if (tw_dev->alignment_virtual_address[request_id] == NULL) {
printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment virtual address.\n");
return 1;
}
param = (TW_Param *)tw_dev->alignment_virtual_address[request_id];
memset(param, 0, sizeof(TW_Sector));
param->table_id = 0x401; /* AEN table */
param->parameter_id = 2; /* Unit code */
param->parameter_size_bytes = 2;
param_value = tw_dev->alignment_physical_address[request_id];
if (param_value == 0) {
printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Bad alignment physical address.\n");
return 1;
}
command_packet->byte8.param.sgl[0].address = param_value;
command_packet->byte8.param.sgl[0].length = sizeof(TW_Sector);
/* Now drain the controller's aen queue */
do {
/* Post command packet */
outl(command_que_value, TW_COMMAND_QUEUE_REG_ADDR(tw_dev));
/* Now poll for completion */
if (tw_poll_status_gone(tw_dev, TW_STATUS_RESPONSE_QUEUE_EMPTY, 30) == 0) {
response_queue.value = inl(TW_RESPONSE_QUEUE_REG_ADDR(tw_dev));
request_id = TW_RESID_OUT(response_queue.response_id);
if (request_id != 0) {
/* Unexpected request id */
printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Unexpected request id.\n");
return 1;
}
if (command_packet->status != 0) {
if (command_packet->flags != TW_AEN_TABLE_UNDEFINED) {
/* Bad response */
tw_decode_sense(tw_dev, request_id, 0);
return 1;
} else {
/* We know this is a 3w-1x00, and doesn't support aen's */
return 0;
}
}
/* Now check the aen */
aen = *(unsigned short *)(param->data);
aen_code = (aen & 0x0ff);
queue = 0;
switch (aen_code) {
case TW_AEN_QUEUE_EMPTY:
dprintk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
if (first_reset != 1) {
return 1;
} else {
finished = 1;
}
break;
case TW_AEN_SOFT_RESET:
if (first_reset == 0) {
first_reset = 1;
} else {
printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
tw_dev->aen_count++;
queue = 1;
}
break;
default:
if (aen == 0x0ff) {
printk(KERN_WARNING "3w-xxxx: AEN: INFO: AEN queue overflow.\n");
} else {
table_max = ARRAY_SIZE(tw_aen_string);
if ((aen & 0x0ff) < table_max) {
if ((tw_aen_string[aen & 0xff][strlen(tw_aen_string[aen & 0xff])-1]) == '#') {
printk(KERN_WARNING "3w-xxxx: AEN: %s%d.\n", tw_aen_string[aen & 0xff], aen >> 8);
} else {
printk(KERN_WARNING "3w-xxxx: AEN: %s.\n", tw_aen_string[aen & 0xff]);
}
} else
printk(KERN_WARNING "3w-xxxx: Received AEN %d.\n", aen);
}
tw_dev->aen_count++;
queue = 1;
}
/* Now put the aen on the aen_queue */
if (queue == 1) {
tw_dev->aen_queue[tw_dev->aen_tail] = aen;
if (tw_dev->aen_tail == TW_Q_LENGTH - 1) {
tw_dev->aen_tail = TW_Q_START;
} else {
tw_dev->aen_tail = tw_dev->aen_tail + 1;
}
if (tw_dev->aen_head == tw_dev->aen_tail) {
if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
tw_dev->aen_head = TW_Q_START;
} else {
tw_dev->aen_head = tw_dev->aen_head + 1;
}
}
}
found = 1;
}
if (found == 0) {
printk(KERN_WARNING "3w-xxxx: tw_aen_drain_queue(): Response never received.\n");
return 1;
}
} while (finished == 0);
return 0;
} /* End tw_aen_drain_queue() */
/* This function will allocate memory */
static int tw_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
{
int i;
dma_addr_t dma_handle;
unsigned long *cpu_addr = NULL;
dprintk(KERN_NOTICE "3w-xxxx: tw_allocate_memory()\n");
cpu_addr = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle);
if (cpu_addr == NULL) {
printk(KERN_WARNING "3w-xxxx: pci_alloc_consistent() failed.\n");
return 1;
}
if ((unsigned long)cpu_addr % (tw_dev->tw_pci_dev->device == TW_DEVICE_ID ? TW_ALIGNMENT_6000 : TW_ALIGNMENT_7000)) {
printk(KERN_WARNING "3w-xxxx: Couldn't allocate correctly aligned memory.\n");
pci_free_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, cpu_addr, dma_handle);
return 1;
}
memset(cpu_addr, 0, size*TW_Q_LENGTH);
for (i=0;i<TW_Q_LENGTH;i++) {
switch(which) {
case 0:
tw_dev->command_packet_physical_address[i] = dma_handle+(i*size);
tw_dev->command_packet_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
break;
case 1:
tw_dev->alignment_physical_address[i] = dma_handle+(i*size);
tw_dev->alignment_virtual_address[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
break;
default:
printk(KERN_WARNING "3w-xxxx: tw_allocate_memory(): case slip in tw_allocate_memory()\n");
return 1;
}
}
return 0;
} /* End tw_allocate_memory() */
/* This function handles ioctl for the character device */
static long tw_chrdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
int request_id;
dma_addr_t dma_handle;
unsigned short tw_aen_code;
unsigned long flags;
unsigned int data_buffer_length = 0;
unsigned long data_buffer_length_adjusted = 0;
struct inode *inode = file_inode(file);
unsigned long *cpu_addr;
long timeout;
TW_New_Ioctl *tw_ioctl;
TW_Passthru *passthru;
TW_Device_Extension *tw_dev = tw_device_extension_list[iminor(inode)];
int retval = -EFAULT;
void __user *argp = (void __user *)arg;
dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl()\n");
mutex_lock(&tw_mutex);
/* Only let one of these through at a time */
if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
mutex_unlock(&tw_mutex);
return -EINTR;
}
/* First copy down the buffer length */
if (copy_from_user(&data_buffer_length, argp, sizeof(unsigned int)))
goto out;
/* Check size */
if (data_buffer_length > TW_MAX_IOCTL_SECTORS * 512) {
retval = -EINVAL;
goto out;
}
/* Hardware can only do multiple of 512 byte transfers */
data_buffer_length_adjusted = (data_buffer_length + 511) & ~511;
/* Now allocate ioctl buf memory */
cpu_addr = dma_alloc_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_New_Ioctl) - 1, &dma_handle, GFP_KERNEL);
if (cpu_addr == NULL) {
retval = -ENOMEM;
goto out;
}
tw_ioctl = (TW_New_Ioctl *)cpu_addr;
/* Now copy down the entire ioctl */
if (copy_from_user(tw_ioctl, argp, data_buffer_length + sizeof(TW_New_Ioctl) - 1))
goto out2;
passthru = (TW_Passthru *)&tw_ioctl->firmware_command;
/* See which ioctl we are doing */
switch (cmd) {
case TW_OP_NOP:
dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_OP_NOP.\n");
break;
case TW_OP_AEN_LISTEN:
dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_AEN_LISTEN.\n");
memset(tw_ioctl->data_buffer, 0, data_buffer_length);
spin_lock_irqsave(tw_dev->host->host_lock, flags);
if (tw_dev->aen_head == tw_dev->aen_tail) {
tw_aen_code = TW_AEN_QUEUE_EMPTY;
} else {
tw_aen_code = tw_dev->aen_queue[tw_dev->aen_head];
if (tw_dev->aen_head == TW_Q_LENGTH - 1) {
tw_dev->aen_head = TW_Q_START;
} else {
tw_dev->aen_head = tw_dev->aen_head + 1;
}
}
spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
memcpy(tw_ioctl->data_buffer, &tw_aen_code, sizeof(tw_aen_code));
break;
case TW_CMD_PACKET_WITH_DATA:
dprintk(KERN_WARNING "3w-xxxx: tw_chrdev_ioctl(): caught TW_CMD_PACKET_WITH_DATA.\n");
spin_lock_irqsave(tw_dev->host->host_lock, flags);
tw_state_request_start(tw_dev, &request_id);
/* Flag internal command */
tw_dev->srb[request_id] = NULL;
/* Flag chrdev ioctl */
tw_dev->chrdev_request_id = request_id;
tw_ioctl->firmware_command.request_id = request_id;
/* Load the sg list */
switch (TW_SGL_OUT(tw_ioctl->firmware_command.opcode__sgloffset)) {
case 2:
tw_ioctl->firmware_command.byte8.param.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
tw_ioctl->firmware_command.byte8.param.sgl[0].length = data_buffer_length_adjusted;
break;
case 3:
tw_ioctl->firmware_command.byte8.io.sgl[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
tw_ioctl->firmware_command.byte8.io.sgl[0].length = data_buffer_length_adjusted;
break;
case 5:
passthru->sg_list[0].address = dma_handle + sizeof(TW_New_Ioctl) - 1;
passthru->sg_list[0].length = data_buffer_length_adjusted;
break;
}
memcpy(tw_dev->command_packet_virtual_address[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command));
/* Now post the command packet to the controller */
tw_post_command_packet(tw_dev, request_id);
spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
timeout = TW_IOCTL_CHRDEV_TIMEOUT*HZ;
/* Now wait for the command to complete */