/
3w-sas.c
1925 lines (1600 loc) · 59 KB
/
3w-sas.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-sas.c -- LSI 3ware SAS/SATA-RAID Controller device driver for Linux.
Written By: Adam Radford <linuxraid@lsi.com>
Copyright (C) 2009 LSI Corporation.
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
Controllers supported by this driver:
LSI 3ware 9750 6Gb/s SAS/SATA-RAID
Bugs/Comments/Suggestions should be mailed to:
linuxraid@lsi.com
For more information, goto:
http://www.lsi.com
History
-------
3.26.02.000 - Initial driver release.
*/
#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/pci.h>
#include <linux/time.h>
#include <linux/mutex.h>
#include <linux/smp_lock.h>
#include <linux/slab.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 "3w-sas.h"
/* Globals */
#define TW_DRIVER_VERSION "3.26.02.000"
static TW_Device_Extension *twl_device_extension_list[TW_MAX_SLOT];
static unsigned int twl_device_extension_count;
static int twl_major = -1;
extern struct timezone sys_tz;
/* Module parameters */
MODULE_AUTHOR ("LSI");
MODULE_DESCRIPTION ("LSI 3ware SAS/SATA-RAID Linux Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(TW_DRIVER_VERSION);
static int use_msi;
module_param(use_msi, int, S_IRUGO);
MODULE_PARM_DESC(use_msi, "Use Message Signaled Interrupts. Default: 0");
/* Function prototypes */
static int twl_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_reset);
/* Functions */
/* This function returns AENs through sysfs */
static ssize_t twl_sysfs_aen_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *outbuf, loff_t offset, size_t count)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct Scsi_Host *shost = class_to_shost(dev);
TW_Device_Extension *tw_dev = (TW_Device_Extension *)shost->hostdata;
unsigned long flags = 0;
ssize_t ret;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
spin_lock_irqsave(tw_dev->host->host_lock, flags);
ret = memory_read_from_buffer(outbuf, count, &offset, tw_dev->event_queue[0], sizeof(TW_Event) * TW_Q_LENGTH);
spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
return ret;
} /* End twl_sysfs_aen_read() */
/* aen_read sysfs attribute initializer */
static struct bin_attribute twl_sysfs_aen_read_attr = {
.attr = {
.name = "3ware_aen_read",
.mode = S_IRUSR,
},
.size = 0,
.read = twl_sysfs_aen_read
};
/* This function returns driver compatibility info through sysfs */
static ssize_t twl_sysfs_compat_info(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *outbuf, loff_t offset, size_t count)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct Scsi_Host *shost = class_to_shost(dev);
TW_Device_Extension *tw_dev = (TW_Device_Extension *)shost->hostdata;
unsigned long flags = 0;
ssize_t ret;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
spin_lock_irqsave(tw_dev->host->host_lock, flags);
ret = memory_read_from_buffer(outbuf, count, &offset, &tw_dev->tw_compat_info, sizeof(TW_Compatibility_Info));
spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
return ret;
} /* End twl_sysfs_compat_info() */
/* compat_info sysfs attribute initializer */
static struct bin_attribute twl_sysfs_compat_info_attr = {
.attr = {
.name = "3ware_compat_info",
.mode = S_IRUSR,
},
.size = 0,
.read = twl_sysfs_compat_info
};
/* Show some statistics about the card */
static ssize_t twl_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-sas Driver version: %s\n"
"Current commands posted: %4d\n"
"Max commands posted: %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->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 twl_show_stats() */
/* This function will set a devices queue depth */
static int twl_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 twl_change_queue_depth() */
/* stats sysfs attribute initializer */
static struct device_attribute twl_host_stats_attr = {
.attr = {
.name = "3ware_stats",
.mode = S_IRUGO,
},
.show = twl_show_stats
};
/* Host attributes initializer */
static struct device_attribute *twl_host_attrs[] = {
&twl_host_stats_attr,
NULL,
};
/* This function will look up an AEN severity string */
static char *twl_aen_severity_lookup(unsigned char severity_code)
{
char *retval = NULL;
if ((severity_code < (unsigned char) TW_AEN_SEVERITY_ERROR) ||
(severity_code > (unsigned char) TW_AEN_SEVERITY_DEBUG))
goto out;
retval = twl_aen_severity_table[severity_code];
out:
return retval;
} /* End twl_aen_severity_lookup() */
/* This function will queue an event */
static void twl_aen_queue_event(TW_Device_Extension *tw_dev, TW_Command_Apache_Header *header)
{
u32 local_time;
struct timeval time;
TW_Event *event;
unsigned short aen;
char host[16];
char *error_str;
tw_dev->aen_count++;
/* Fill out event info */
event = tw_dev->event_queue[tw_dev->error_index];
host[0] = '\0';
if (tw_dev->host)
sprintf(host, " scsi%d:", tw_dev->host->host_no);
aen = le16_to_cpu(header->status_block.error);
memset(event, 0, sizeof(TW_Event));
event->severity = TW_SEV_OUT(header->status_block.severity__reserved);
do_gettimeofday(&time);
local_time = (u32)(time.tv_sec - (sys_tz.tz_minuteswest * 60));
event->time_stamp_sec = local_time;
event->aen_code = aen;
event->retrieved = TW_AEN_NOT_RETRIEVED;
event->sequence_id = tw_dev->error_sequence_id;
tw_dev->error_sequence_id++;
/* Check for embedded error string */
error_str = &(header->err_specific_desc[strlen(header->err_specific_desc)+1]);
header->err_specific_desc[sizeof(header->err_specific_desc) - 1] = '\0';
event->parameter_len = strlen(header->err_specific_desc);
memcpy(event->parameter_data, header->err_specific_desc, event->parameter_len + 1 + strlen(error_str));
if (event->severity != TW_AEN_SEVERITY_DEBUG)
printk(KERN_WARNING "3w-sas:%s AEN: %s (0x%02X:0x%04X): %s:%s.\n",
host,
twl_aen_severity_lookup(TW_SEV_OUT(header->status_block.severity__reserved)),
TW_MESSAGE_SOURCE_CONTROLLER_EVENT, aen, error_str,
header->err_specific_desc);
else
tw_dev->aen_count--;
tw_dev->error_index = (tw_dev->error_index + 1 ) % TW_Q_LENGTH;
} /* End twl_aen_queue_event() */
/* This function will attempt to post a command packet to the board */
static int twl_post_command_packet(TW_Device_Extension *tw_dev, int request_id)
{
dma_addr_t command_que_value;
command_que_value = tw_dev->command_packet_phys[request_id];
command_que_value += TW_COMMAND_OFFSET;
/* First write upper 4 bytes */
writel((u32)((u64)command_que_value >> 32), TWL_HIBQPH_REG_ADDR(tw_dev));
/* Then the lower 4 bytes */
writel((u32)(command_que_value | TWL_PULL_MODE), TWL_HIBQPL_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;
return 0;
} /* End twl_post_command_packet() */
/* This function will perform a pci-dma mapping for a scatter gather list */
static int twl_map_scsi_sg_data(TW_Device_Extension *tw_dev, int request_id)
{
int use_sg;
struct scsi_cmnd *cmd = tw_dev->srb[request_id];
use_sg = scsi_dma_map(cmd);
if (!use_sg)
return 0;
else if (use_sg < 0) {
TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1, "Failed to map scatter gather list");
return 0;
}
cmd->SCp.phase = TW_PHASE_SGLIST;
cmd->SCp.have_data_in = use_sg;
return use_sg;
} /* End twl_map_scsi_sg_data() */
/* This function hands scsi cdb's to the firmware */
static int twl_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, char *cdb, int use_sg, TW_SG_Entry_ISO *sglistarg)
{
TW_Command_Full *full_command_packet;
TW_Command_Apache *command_packet;
int i, sg_count;
struct scsi_cmnd *srb = NULL;
struct scatterlist *sglist = NULL, *sg;
int retval = 1;
if (tw_dev->srb[request_id]) {
srb = tw_dev->srb[request_id];
if (scsi_sglist(srb))
sglist = scsi_sglist(srb);
}
/* Initialize command packet */
full_command_packet = tw_dev->command_packet_virt[request_id];
full_command_packet->header.header_desc.size_header = 128;
full_command_packet->header.status_block.error = 0;
full_command_packet->header.status_block.severity__reserved = 0;
command_packet = &full_command_packet->command.newcommand;
command_packet->status = 0;
command_packet->opcode__reserved = TW_OPRES_IN(0, TW_OP_EXECUTE_SCSI);
/* We forced 16 byte cdb use earlier */
if (!cdb)
memcpy(command_packet->cdb, srb->cmnd, TW_MAX_CDB_LEN);
else
memcpy(command_packet->cdb, cdb, TW_MAX_CDB_LEN);
if (srb) {
command_packet->unit = srb->device->id;
command_packet->request_id__lunl =
cpu_to_le16(TW_REQ_LUN_IN(srb->device->lun, request_id));
} else {
command_packet->request_id__lunl =
cpu_to_le16(TW_REQ_LUN_IN(0, request_id));
command_packet->unit = 0;
}
command_packet->sgl_offset = 16;
if (!sglistarg) {
/* Map sglist from scsi layer to cmd packet */
if (scsi_sg_count(srb)) {
sg_count = twl_map_scsi_sg_data(tw_dev, request_id);
if (sg_count == 0)
goto out;
scsi_for_each_sg(srb, sg, sg_count, i) {
command_packet->sg_list[i].address = TW_CPU_TO_SGL(sg_dma_address(sg));
command_packet->sg_list[i].length = TW_CPU_TO_SGL(sg_dma_len(sg));
}
command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN((srb->device->lun >> 4), scsi_sg_count(tw_dev->srb[request_id])));
}
} else {
/* Internal cdb post */
for (i = 0; i < use_sg; i++) {
command_packet->sg_list[i].address = TW_CPU_TO_SGL(sglistarg[i].address);
command_packet->sg_list[i].length = TW_CPU_TO_SGL(sglistarg[i].length);
}
command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN(0, use_sg));
}
/* Update some stats */
if (srb) {
tw_dev->sector_count = scsi_bufflen(srb) / 512;
if (tw_dev->sector_count > tw_dev->max_sector_count)
tw_dev->max_sector_count = tw_dev->sector_count;
tw_dev->sgl_entries = scsi_sg_count(srb);
if (tw_dev->sgl_entries > tw_dev->max_sgl_entries)
tw_dev->max_sgl_entries = tw_dev->sgl_entries;
}
/* Now post the command to the board */
retval = twl_post_command_packet(tw_dev, request_id);
out:
return retval;
} /* End twl_scsiop_execute_scsi() */
/* This function will read the aen queue from the isr */
static int twl_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
{
char cdb[TW_MAX_CDB_LEN];
TW_SG_Entry_ISO sglist[1];
TW_Command_Full *full_command_packet;
int retval = 1;
full_command_packet = tw_dev->command_packet_virt[request_id];
memset(full_command_packet, 0, sizeof(TW_Command_Full));
/* Initialize cdb */
memset(&cdb, 0, TW_MAX_CDB_LEN);
cdb[0] = REQUEST_SENSE; /* opcode */
cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */
/* Initialize sglist */
memset(&sglist, 0, sizeof(TW_SG_Entry_ISO));
sglist[0].length = TW_SECTOR_SIZE;
sglist[0].address = tw_dev->generic_buffer_phys[request_id];
/* Mark internal command */
tw_dev->srb[request_id] = NULL;
/* Now post the command packet */
if (twl_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2, "Post failed while reading AEN queue");
goto out;
}
retval = 0;
out:
return retval;
} /* End twl_aen_read_queue() */
/* This function will sync firmware time with the host time */
static void twl_aen_sync_time(TW_Device_Extension *tw_dev, int request_id)
{
u32 schedulertime;
struct timeval utc;
TW_Command_Full *full_command_packet;
TW_Command *command_packet;
TW_Param_Apache *param;
u32 local_time;
/* Fill out the command packet */
full_command_packet = tw_dev->command_packet_virt[request_id];
memset(full_command_packet, 0, sizeof(TW_Command_Full));
command_packet = &full_command_packet->command.oldcommand;
command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_SET_PARAM);
command_packet->request_id = request_id;
command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
command_packet->byte8_offset.param.sgl[0].length = TW_CPU_TO_SGL(TW_SECTOR_SIZE);
command_packet->size = TW_COMMAND_SIZE;
command_packet->byte6_offset.parameter_count = cpu_to_le16(1);
/* Setup the param */
param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id];
memset(param, 0, TW_SECTOR_SIZE);
param->table_id = cpu_to_le16(TW_TIMEKEEP_TABLE | 0x8000); /* Controller time keep table */
param->parameter_id = cpu_to_le16(0x3); /* SchedulerTime */
param->parameter_size_bytes = cpu_to_le16(4);
/* Convert system time in UTC to local time seconds since last
Sunday 12:00AM */
do_gettimeofday(&utc);
local_time = (u32)(utc.tv_sec - (sys_tz.tz_minuteswest * 60));
schedulertime = local_time - (3 * 86400);
schedulertime = cpu_to_le32(schedulertime % 604800);
memcpy(param->data, &schedulertime, sizeof(u32));
/* Mark internal command */
tw_dev->srb[request_id] = NULL;
/* Now post the command */
twl_post_command_packet(tw_dev, request_id);
} /* End twl_aen_sync_time() */
/* This function will assign an available request id */
static void twl_get_request_id(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 twl_get_request_id() */
/* This function will free a request id */
static void twl_free_request_id(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 twl_free_request_id() */
/* This function will complete an aen request from the isr */
static int twl_aen_complete(TW_Device_Extension *tw_dev, int request_id)
{
TW_Command_Full *full_command_packet;
TW_Command *command_packet;
TW_Command_Apache_Header *header;
unsigned short aen;
int retval = 1;
header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id];
tw_dev->posted_request_count--;
aen = le16_to_cpu(header->status_block.error);
full_command_packet = tw_dev->command_packet_virt[request_id];
command_packet = &full_command_packet->command.oldcommand;
/* First check for internal completion of set param for time sync */
if (TW_OP_OUT(command_packet->opcode__sgloffset) == TW_OP_SET_PARAM) {
/* Keep reading the queue in case there are more aen's */
if (twl_aen_read_queue(tw_dev, request_id))
goto out2;
else {
retval = 0;
goto out;
}
}
switch (aen) {
case TW_AEN_QUEUE_EMPTY:
/* Quit reading the queue if this is the last one */
break;
case TW_AEN_SYNC_TIME_WITH_HOST:
twl_aen_sync_time(tw_dev, request_id);
retval = 0;
goto out;
default:
twl_aen_queue_event(tw_dev, header);
/* If there are more aen's, keep reading the queue */
if (twl_aen_read_queue(tw_dev, request_id))
goto out2;
else {
retval = 0;
goto out;
}
}
retval = 0;
out2:
tw_dev->state[request_id] = TW_S_COMPLETED;
twl_free_request_id(tw_dev, request_id);
clear_bit(TW_IN_ATTENTION_LOOP, &tw_dev->flags);
out:
return retval;
} /* End twl_aen_complete() */
/* This function will poll for a response */
static int twl_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds)
{
unsigned long before;
dma_addr_t mfa;
u32 regh, regl;
u32 response;
int retval = 1;
int found = 0;
before = jiffies;
while (!found) {
if (sizeof(dma_addr_t) > 4) {
regh = readl(TWL_HOBQPH_REG_ADDR(tw_dev));
regl = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
mfa = ((u64)regh << 32) | regl;
} else
mfa = readl(TWL_HOBQPL_REG_ADDR(tw_dev));
response = (u32)mfa;
if (TW_RESID_OUT(response) == request_id)
found = 1;
if (time_after(jiffies, before + HZ * seconds))
goto out;
msleep(50);
}
retval = 0;
out:
return retval;
} /* End twl_poll_response() */
/* This function will drain the aen queue */
static int twl_aen_drain_queue(TW_Device_Extension *tw_dev, int no_check_reset)
{
int request_id = 0;
char cdb[TW_MAX_CDB_LEN];
TW_SG_Entry_ISO sglist[1];
int finished = 0, count = 0;
TW_Command_Full *full_command_packet;
TW_Command_Apache_Header *header;
unsigned short aen;
int first_reset = 0, queue = 0, retval = 1;
if (no_check_reset)
first_reset = 0;
else
first_reset = 1;
full_command_packet = tw_dev->command_packet_virt[request_id];
memset(full_command_packet, 0, sizeof(TW_Command_Full));
/* Initialize cdb */
memset(&cdb, 0, TW_MAX_CDB_LEN);
cdb[0] = REQUEST_SENSE; /* opcode */
cdb[4] = TW_ALLOCATION_LENGTH; /* allocation length */
/* Initialize sglist */
memset(&sglist, 0, sizeof(TW_SG_Entry_ISO));
sglist[0].length = TW_SECTOR_SIZE;
sglist[0].address = tw_dev->generic_buffer_phys[request_id];
/* Mark internal command */
tw_dev->srb[request_id] = NULL;
do {
/* Send command to the board */
if (twl_scsiop_execute_scsi(tw_dev, request_id, cdb, 1, sglist)) {
TW_PRINTK(tw_dev->host, TW_DRIVER, 0x3, "Error posting request sense");
goto out;
}
/* Now poll for completion */
if (twl_poll_response(tw_dev, request_id, 30)) {
TW_PRINTK(tw_dev->host, TW_DRIVER, 0x4, "No valid response while draining AEN queue");
tw_dev->posted_request_count--;
goto out;
}
tw_dev->posted_request_count--;
header = (TW_Command_Apache_Header *)tw_dev->generic_buffer_virt[request_id];
aen = le16_to_cpu(header->status_block.error);
queue = 0;
count++;
switch (aen) {
case TW_AEN_QUEUE_EMPTY:
if (first_reset != 1)
goto out;
else
finished = 1;
break;
case TW_AEN_SOFT_RESET:
if (first_reset == 0)
first_reset = 1;
else
queue = 1;
break;
case TW_AEN_SYNC_TIME_WITH_HOST:
break;
default:
queue = 1;
}
/* Now queue an event info */
if (queue)
twl_aen_queue_event(tw_dev, header);
} while ((finished == 0) && (count < TW_MAX_AEN_DRAIN));
if (count == TW_MAX_AEN_DRAIN)
goto out;
retval = 0;
out:
tw_dev->state[request_id] = TW_S_INITIAL;
return retval;
} /* End twl_aen_drain_queue() */
/* This function will allocate memory and check if it is correctly aligned */
static int twl_allocate_memory(TW_Device_Extension *tw_dev, int size, int which)
{
int i;
dma_addr_t dma_handle;
unsigned long *cpu_addr;
int retval = 1;
cpu_addr = pci_alloc_consistent(tw_dev->tw_pci_dev, size*TW_Q_LENGTH, &dma_handle);
if (!cpu_addr) {
TW_PRINTK(tw_dev->host, TW_DRIVER, 0x5, "Memory allocation failed");
goto out;
}
memset(cpu_addr, 0, size*TW_Q_LENGTH);
for (i = 0; i < TW_Q_LENGTH; i++) {
switch(which) {
case 0:
tw_dev->command_packet_phys[i] = dma_handle+(i*size);
tw_dev->command_packet_virt[i] = (TW_Command_Full *)((unsigned char *)cpu_addr + (i*size));
break;
case 1:
tw_dev->generic_buffer_phys[i] = dma_handle+(i*size);
tw_dev->generic_buffer_virt[i] = (unsigned long *)((unsigned char *)cpu_addr + (i*size));
break;
case 2:
tw_dev->sense_buffer_phys[i] = dma_handle+(i*size);
tw_dev->sense_buffer_virt[i] = (TW_Command_Apache_Header *)((unsigned char *)cpu_addr + (i*size));
break;
}
}
retval = 0;
out:
return retval;
} /* End twl_allocate_memory() */
/* This function will load the request id and various sgls for ioctls */
static void twl_load_sgl(TW_Device_Extension *tw_dev, TW_Command_Full *full_command_packet, int request_id, dma_addr_t dma_handle, int length)
{
TW_Command *oldcommand;
TW_Command_Apache *newcommand;
TW_SG_Entry_ISO *sgl;
unsigned int pae = 0;
if ((sizeof(long) < 8) && (sizeof(dma_addr_t) > 4))
pae = 1;
if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) {
newcommand = &full_command_packet->command.newcommand;
newcommand->request_id__lunl =
cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->request_id__lunl), request_id));
if (length) {
newcommand->sg_list[0].address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1);
newcommand->sg_list[0].length = TW_CPU_TO_SGL(length);
}
newcommand->sgl_entries__lunh =
cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->sgl_entries__lunh), length ? 1 : 0));
} else {
oldcommand = &full_command_packet->command.oldcommand;
oldcommand->request_id = request_id;
if (TW_SGL_OUT(oldcommand->opcode__sgloffset)) {
/* Load the sg list */
sgl = (TW_SG_Entry_ISO *)((u32 *)oldcommand+oldcommand->size - (sizeof(TW_SG_Entry_ISO)/4) + pae + (sizeof(dma_addr_t) > 4 ? 1 : 0));
sgl->address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache) - 1);
sgl->length = TW_CPU_TO_SGL(length);
oldcommand->size += pae;
oldcommand->size += sizeof(dma_addr_t) > 4 ? 1 : 0;
}
}
} /* End twl_load_sgl() */
/* This function handles ioctl for the character device
This interface is used by smartmontools open source software */
static int twl_chrdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
{
long timeout;
unsigned long *cpu_addr, data_buffer_length_adjusted = 0, flags = 0;
dma_addr_t dma_handle;
int request_id = 0;
TW_Ioctl_Driver_Command driver_command;
TW_Ioctl_Buf_Apache *tw_ioctl;
TW_Command_Full *full_command_packet;
TW_Device_Extension *tw_dev = twl_device_extension_list[iminor(inode)];
int retval = -EFAULT;
void __user *argp = (void __user *)arg;
/* Only let one of these through at a time */
if (mutex_lock_interruptible(&tw_dev->ioctl_lock)) {
retval = -EINTR;
goto out;
}
/* First copy down the driver command */
if (copy_from_user(&driver_command, argp, sizeof(TW_Ioctl_Driver_Command)))
goto out2;
/* Check data buffer size */
if (driver_command.buffer_length > TW_MAX_SECTORS * 2048) {
retval = -EINVAL;
goto out2;
}
/* Hardware can only do multiple of 512 byte transfers */
data_buffer_length_adjusted = (driver_command.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_Ioctl_Buf_Apache) - 1, &dma_handle, GFP_KERNEL);
if (!cpu_addr) {
retval = -ENOMEM;
goto out2;
}
tw_ioctl = (TW_Ioctl_Buf_Apache *)cpu_addr;
/* Now copy down the entire ioctl */
if (copy_from_user(tw_ioctl, argp, driver_command.buffer_length + sizeof(TW_Ioctl_Buf_Apache) - 1))
goto out3;
/* See which ioctl we are doing */
switch (cmd) {
case TW_IOCTL_FIRMWARE_PASS_THROUGH:
spin_lock_irqsave(tw_dev->host->host_lock, flags);
twl_get_request_id(tw_dev, &request_id);
/* Flag internal command */
tw_dev->srb[request_id] = NULL;
/* Flag chrdev ioctl */
tw_dev->chrdev_request_id = request_id;
full_command_packet = (TW_Command_Full *)&tw_ioctl->firmware_command;
/* Load request id and sglist for both command types */
twl_load_sgl(tw_dev, full_command_packet, request_id, dma_handle, data_buffer_length_adjusted);
memcpy(tw_dev->command_packet_virt[request_id], &(tw_ioctl->firmware_command), sizeof(TW_Command_Full));
/* Now post the command packet to the controller */
twl_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 command to complete */
timeout = wait_event_timeout(tw_dev->ioctl_wqueue, tw_dev->chrdev_request_id == TW_IOCTL_CHRDEV_FREE, timeout);
/* We timed out, and didn't get an interrupt */
if (tw_dev->chrdev_request_id != TW_IOCTL_CHRDEV_FREE) {
/* Now we need to reset the board */
printk(KERN_WARNING "3w-sas: scsi%d: WARNING: (0x%02X:0x%04X): Character ioctl (0x%x) timed out, resetting card.\n",
tw_dev->host->host_no, TW_DRIVER, 0x6,
cmd);
retval = -EIO;
twl_reset_device_extension(tw_dev, 1);
goto out3;
}
/* Now copy in the command packet response */
memcpy(&(tw_ioctl->firmware_command), tw_dev->command_packet_virt[request_id], sizeof(TW_Command_Full));
/* Now complete the io */
spin_lock_irqsave(tw_dev->host->host_lock, flags);
tw_dev->posted_request_count--;
tw_dev->state[request_id] = TW_S_COMPLETED;
twl_free_request_id(tw_dev, request_id);
spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
break;
default:
retval = -ENOTTY;
goto out3;
}
/* Now copy the entire response to userspace */
if (copy_to_user(argp, tw_ioctl, sizeof(TW_Ioctl_Buf_Apache) + driver_command.buffer_length - 1) == 0)
retval = 0;
out3:
/* Now free ioctl buf memory */
dma_free_coherent(&tw_dev->tw_pci_dev->dev, data_buffer_length_adjusted+sizeof(TW_Ioctl_Buf_Apache) - 1, cpu_addr, dma_handle);
out2:
mutex_unlock(&tw_dev->ioctl_lock);
out:
return retval;
} /* End twl_chrdev_ioctl() */
/* This function handles open for the character device */
static int twl_chrdev_open(struct inode *inode, struct file *file)
{
unsigned int minor_number;
int retval = -ENODEV;
if (!capable(CAP_SYS_ADMIN)) {
retval = -EACCES;
goto out;
}
cycle_kernel_lock();
minor_number = iminor(inode);
if (minor_number >= twl_device_extension_count)
goto out;
retval = 0;
out:
return retval;
} /* End twl_chrdev_open() */
/* File operations struct for character device */
static const struct file_operations twl_fops = {
.owner = THIS_MODULE,
.ioctl = twl_chrdev_ioctl,
.open = twl_chrdev_open,
.release = NULL
};
/* This function passes sense data from firmware to scsi layer */
static int twl_fill_sense(TW_Device_Extension *tw_dev, int i, int request_id, int copy_sense, int print_host)
{
TW_Command_Apache_Header *header;
TW_Command_Full *full_command_packet;
unsigned short error;
char *error_str;
int retval = 1;
header = tw_dev->sense_buffer_virt[i];
full_command_packet = tw_dev->command_packet_virt[request_id];
/* Get embedded firmware error string */
error_str = &(header->err_specific_desc[strlen(header->err_specific_desc) + 1]);
/* Don't print error for Logical unit not supported during rollcall */
error = le16_to_cpu(header->status_block.error);
if ((error != TW_ERROR_LOGICAL_UNIT_NOT_SUPPORTED) && (error != TW_ERROR_UNIT_OFFLINE) && (error != TW_ERROR_INVALID_FIELD_IN_CDB)) {
if (print_host)
printk(KERN_WARNING "3w-sas: scsi%d: ERROR: (0x%02X:0x%04X): %s:%s.\n",
tw_dev->host->host_no,
TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
header->status_block.error,
error_str,
header->err_specific_desc);
else
printk(KERN_WARNING "3w-sas: ERROR: (0x%02X:0x%04X): %s:%s.\n",
TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
header->status_block.error,
error_str,
header->err_specific_desc);
}
if (copy_sense) {
memcpy(tw_dev->srb[request_id]->sense_buffer, header->sense_data, TW_SENSE_DATA_LENGTH);
tw_dev->srb[request_id]->result = (full_command_packet->command.newcommand.status << 1);
goto out;
}
out:
return retval;
} /* End twl_fill_sense() */
/* This function will free up device extension resources */
static void twl_free_device_extension(TW_Device_Extension *tw_dev)
{
if (tw_dev->command_packet_virt[0])
pci_free_consistent(tw_dev->tw_pci_dev,
sizeof(TW_Command_Full)*TW_Q_LENGTH,
tw_dev->command_packet_virt[0],
tw_dev->command_packet_phys[0]);
if (tw_dev->generic_buffer_virt[0])
pci_free_consistent(tw_dev->tw_pci_dev,
TW_SECTOR_SIZE*TW_Q_LENGTH,
tw_dev->generic_buffer_virt[0],
tw_dev->generic_buffer_phys[0]);
if (tw_dev->sense_buffer_virt[0])
pci_free_consistent(tw_dev->tw_pci_dev,
sizeof(TW_Command_Apache_Header)*
TW_Q_LENGTH,
tw_dev->sense_buffer_virt[0],
tw_dev->sense_buffer_phys[0]);
kfree(tw_dev->event_queue[0]);
} /* End twl_free_device_extension() */
/* This function will get parameter table entries from the firmware */
static void *twl_get_param(TW_Device_Extension *tw_dev, int request_id, int table_id, int parameter_id, int parameter_size_bytes)
{
TW_Command_Full *full_command_packet;
TW_Command *command_packet;
TW_Param_Apache *param;
void *retval = NULL;
/* Setup the command packet */
full_command_packet = tw_dev->command_packet_virt[request_id];
memset(full_command_packet, 0, sizeof(TW_Command_Full));
command_packet = &full_command_packet->command.oldcommand;
command_packet->opcode__sgloffset = TW_OPSGL_IN(2, TW_OP_GET_PARAM);
command_packet->size = TW_COMMAND_SIZE;
command_packet->request_id = request_id;
command_packet->byte6_offset.block_count = cpu_to_le16(1);
/* Now setup the param */
param = (TW_Param_Apache *)tw_dev->generic_buffer_virt[request_id];
memset(param, 0, TW_SECTOR_SIZE);
param->table_id = cpu_to_le16(table_id | 0x8000);
param->parameter_id = cpu_to_le16(parameter_id);
param->parameter_size_bytes = cpu_to_le16(parameter_size_bytes);
command_packet->byte8_offset.param.sgl[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
command_packet->byte8_offset.param.sgl[0].length = TW_CPU_TO_SGL(TW_SECTOR_SIZE);
/* Post the command packet to the board */
twl_post_command_packet(tw_dev, request_id);
/* Poll for completion */
if (twl_poll_response(tw_dev, request_id, 30))
TW_PRINTK(tw_dev->host, TW_DRIVER, 0x7, "No valid response during get param")
else
retval = (void *)&(param->data[0]);
tw_dev->posted_request_count--;
tw_dev->state[request_id] = TW_S_INITIAL;
return retval;
} /* End twl_get_param() */