/
megaraid.c
5069 lines (4031 loc) · 114 KB
/
megaraid.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
/*
*
* Linux MegaRAID device driver
*
* Copyright (c) 2002 LSI Logic 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; either version
* 2 of the License, or (at your option) any later version.
*
* Copyright (c) 2002 Red Hat, Inc. All rights reserved.
* - fixes
* - speed-ups (list handling fixes, issued_list, optimizations.)
* - lots of cleanups.
*
* Copyright (c) 2003 Christoph Hellwig <hch@lst.de>
* - new-style, hotplug-aware pci probing and scsi registration
*
* Version : v2.00.4 Mon Nov 14 14:02:43 EST 2005 - Seokmann Ju
* <Seokmann.Ju@lsil.com>
*
* Description: Linux device driver for LSI Logic MegaRAID controller
*
* Supported controllers: MegaRAID 418, 428, 438, 466, 762, 467, 471, 490, 493
* 518, 520, 531, 532
*
* This driver is supported by LSI Logic, with assistance from Red Hat, Dell,
* and others. Please send updates to the mailing list
* linux-scsi@vger.kernel.org .
*
*/
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/blkdev.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/proc_fs.h>
#include <linux/reboot.h>
#include <linux/module.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <scsi/scsicam.h>
#include "scsi.h"
#include <scsi/scsi_host.h>
#include "megaraid.h"
#define MEGARAID_MODULE_VERSION "2.00.4"
MODULE_AUTHOR ("sju@lsil.com");
MODULE_DESCRIPTION ("LSI Logic MegaRAID legacy driver");
MODULE_LICENSE ("GPL");
MODULE_VERSION(MEGARAID_MODULE_VERSION);
static DEFINE_MUTEX(megadev_mutex);
static unsigned int max_cmd_per_lun = DEF_CMD_PER_LUN;
module_param(max_cmd_per_lun, uint, 0);
MODULE_PARM_DESC(max_cmd_per_lun, "Maximum number of commands which can be issued to a single LUN (default=DEF_CMD_PER_LUN=63)");
static unsigned short int max_sectors_per_io = MAX_SECTORS_PER_IO;
module_param(max_sectors_per_io, ushort, 0);
MODULE_PARM_DESC(max_sectors_per_io, "Maximum number of sectors per I/O request (default=MAX_SECTORS_PER_IO=128)");
static unsigned short int max_mbox_busy_wait = MBOX_BUSY_WAIT;
module_param(max_mbox_busy_wait, ushort, 0);
MODULE_PARM_DESC(max_mbox_busy_wait, "Maximum wait for mailbox in microseconds if busy (default=MBOX_BUSY_WAIT=10)");
#define RDINDOOR(adapter) readl((adapter)->mmio_base + 0x20)
#define RDOUTDOOR(adapter) readl((adapter)->mmio_base + 0x2C)
#define WRINDOOR(adapter,value) writel(value, (adapter)->mmio_base + 0x20)
#define WROUTDOOR(adapter,value) writel(value, (adapter)->mmio_base + 0x2C)
/*
* Global variables
*/
static int hba_count;
static adapter_t *hba_soft_state[MAX_CONTROLLERS];
static struct proc_dir_entry *mega_proc_dir_entry;
/* For controller re-ordering */
static struct mega_hbas mega_hbas[MAX_CONTROLLERS];
static long
megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
/*
* The File Operations structure for the serial/ioctl interface of the driver
*/
static const struct file_operations megadev_fops = {
.owner = THIS_MODULE,
.unlocked_ioctl = megadev_unlocked_ioctl,
.open = megadev_open,
.llseek = noop_llseek,
};
/*
* Array to structures for storing the information about the controllers. This
* information is sent to the user level applications, when they do an ioctl
* for this information.
*/
static struct mcontroller mcontroller[MAX_CONTROLLERS];
/* The current driver version */
static u32 driver_ver = 0x02000000;
/* major number used by the device for character interface */
static int major;
#define IS_RAID_CH(hba, ch) (((hba)->mega_ch_class >> (ch)) & 0x01)
/*
* Debug variable to print some diagnostic messages
*/
static int trace_level;
/**
* mega_setup_mailbox()
* @adapter - pointer to our soft state
*
* Allocates a 8 byte aligned memory for the handshake mailbox.
*/
static int
mega_setup_mailbox(adapter_t *adapter)
{
unsigned long align;
adapter->una_mbox64 = pci_alloc_consistent(adapter->dev,
sizeof(mbox64_t), &adapter->una_mbox64_dma);
if( !adapter->una_mbox64 ) return -1;
adapter->mbox = &adapter->una_mbox64->mbox;
adapter->mbox = (mbox_t *)((((unsigned long) adapter->mbox) + 15) &
(~0UL ^ 0xFUL));
adapter->mbox64 = (mbox64_t *)(((unsigned long)adapter->mbox) - 8);
align = ((void *)adapter->mbox) - ((void *)&adapter->una_mbox64->mbox);
adapter->mbox_dma = adapter->una_mbox64_dma + 8 + align;
/*
* Register the mailbox if the controller is an io-mapped controller
*/
if( adapter->flag & BOARD_IOMAP ) {
outb(adapter->mbox_dma & 0xFF,
adapter->host->io_port + MBOX_PORT0);
outb((adapter->mbox_dma >> 8) & 0xFF,
adapter->host->io_port + MBOX_PORT1);
outb((adapter->mbox_dma >> 16) & 0xFF,
adapter->host->io_port + MBOX_PORT2);
outb((adapter->mbox_dma >> 24) & 0xFF,
adapter->host->io_port + MBOX_PORT3);
outb(ENABLE_MBOX_BYTE,
adapter->host->io_port + ENABLE_MBOX_REGION);
irq_ack(adapter);
irq_enable(adapter);
}
return 0;
}
/*
* mega_query_adapter()
* @adapter - pointer to our soft state
*
* Issue the adapter inquiry commands to the controller and find out
* information and parameter about the devices attached
*/
static int
mega_query_adapter(adapter_t *adapter)
{
dma_addr_t prod_info_dma_handle;
mega_inquiry3 *inquiry3;
u8 raw_mbox[sizeof(struct mbox_out)];
mbox_t *mbox;
int retval;
/* Initialize adapter inquiry mailbox */
mbox = (mbox_t *)raw_mbox;
memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
memset(&mbox->m_out, 0, sizeof(raw_mbox));
/*
* Try to issue Inquiry3 command
* if not succeeded, then issue MEGA_MBOXCMD_ADAPTERINQ command and
* update enquiry3 structure
*/
mbox->m_out.xferaddr = (u32)adapter->buf_dma_handle;
inquiry3 = (mega_inquiry3 *)adapter->mega_buffer;
raw_mbox[0] = FC_NEW_CONFIG; /* i.e. mbox->cmd=0xA1 */
raw_mbox[2] = NC_SUBOP_ENQUIRY3; /* i.e. 0x0F */
raw_mbox[3] = ENQ3_GET_SOLICITED_FULL; /* i.e. 0x02 */
/* Issue a blocking command to the card */
if ((retval = issue_scb_block(adapter, raw_mbox))) {
/* the adapter does not support 40ld */
mraid_ext_inquiry *ext_inq;
mraid_inquiry *inq;
dma_addr_t dma_handle;
ext_inq = pci_alloc_consistent(adapter->dev,
sizeof(mraid_ext_inquiry), &dma_handle);
if( ext_inq == NULL ) return -1;
inq = &ext_inq->raid_inq;
mbox->m_out.xferaddr = (u32)dma_handle;
/*issue old 0x04 command to adapter */
mbox->m_out.cmd = MEGA_MBOXCMD_ADPEXTINQ;
issue_scb_block(adapter, raw_mbox);
/*
* update Enquiry3 and ProductInfo structures with
* mraid_inquiry structure
*/
mega_8_to_40ld(inq, inquiry3,
(mega_product_info *)&adapter->product_info);
pci_free_consistent(adapter->dev, sizeof(mraid_ext_inquiry),
ext_inq, dma_handle);
} else { /*adapter supports 40ld */
adapter->flag |= BOARD_40LD;
/*
* get product_info, which is static information and will be
* unchanged
*/
prod_info_dma_handle = pci_map_single(adapter->dev, (void *)
&adapter->product_info,
sizeof(mega_product_info), PCI_DMA_FROMDEVICE);
mbox->m_out.xferaddr = prod_info_dma_handle;
raw_mbox[0] = FC_NEW_CONFIG; /* i.e. mbox->cmd=0xA1 */
raw_mbox[2] = NC_SUBOP_PRODUCT_INFO; /* i.e. 0x0E */
if ((retval = issue_scb_block(adapter, raw_mbox)))
printk(KERN_WARNING
"megaraid: Product_info cmd failed with error: %d\n",
retval);
pci_unmap_single(adapter->dev, prod_info_dma_handle,
sizeof(mega_product_info), PCI_DMA_FROMDEVICE);
}
/*
* kernel scans the channels from 0 to <= max_channel
*/
adapter->host->max_channel =
adapter->product_info.nchannels + NVIRT_CHAN -1;
adapter->host->max_id = 16; /* max targets per channel */
adapter->host->max_lun = 7; /* Up to 7 luns for non disk devices */
adapter->host->cmd_per_lun = max_cmd_per_lun;
adapter->numldrv = inquiry3->num_ldrv;
adapter->max_cmds = adapter->product_info.max_commands;
if(adapter->max_cmds > MAX_COMMANDS)
adapter->max_cmds = MAX_COMMANDS;
adapter->host->can_queue = adapter->max_cmds - 1;
/*
* Get the maximum number of scatter-gather elements supported by this
* firmware
*/
mega_get_max_sgl(adapter);
adapter->host->sg_tablesize = adapter->sglen;
/* use HP firmware and bios version encoding */
if (adapter->product_info.subsysvid == HP_SUBSYS_VID) {
sprintf (adapter->fw_version, "%c%d%d.%d%d",
adapter->product_info.fw_version[2],
adapter->product_info.fw_version[1] >> 8,
adapter->product_info.fw_version[1] & 0x0f,
adapter->product_info.fw_version[0] >> 8,
adapter->product_info.fw_version[0] & 0x0f);
sprintf (adapter->bios_version, "%c%d%d.%d%d",
adapter->product_info.bios_version[2],
adapter->product_info.bios_version[1] >> 8,
adapter->product_info.bios_version[1] & 0x0f,
adapter->product_info.bios_version[0] >> 8,
adapter->product_info.bios_version[0] & 0x0f);
} else {
memcpy(adapter->fw_version,
(char *)adapter->product_info.fw_version, 4);
adapter->fw_version[4] = 0;
memcpy(adapter->bios_version,
(char *)adapter->product_info.bios_version, 4);
adapter->bios_version[4] = 0;
}
printk(KERN_NOTICE "megaraid: [%s:%s] detected %d logical drives.\n",
adapter->fw_version, adapter->bios_version, adapter->numldrv);
/*
* Do we support extended (>10 bytes) cdbs
*/
adapter->support_ext_cdb = mega_support_ext_cdb(adapter);
if (adapter->support_ext_cdb)
printk(KERN_NOTICE "megaraid: supports extended CDBs.\n");
return 0;
}
/**
* mega_runpendq()
* @adapter - pointer to our soft state
*
* Runs through the list of pending requests.
*/
static inline void
mega_runpendq(adapter_t *adapter)
{
if(!list_empty(&adapter->pending_list))
__mega_runpendq(adapter);
}
/*
* megaraid_queue()
* @scmd - Issue this scsi command
* @done - the callback hook into the scsi mid-layer
*
* The command queuing entry point for the mid-layer.
*/
static int
megaraid_queue_lck(Scsi_Cmnd *scmd, void (*done)(Scsi_Cmnd *))
{
adapter_t *adapter;
scb_t *scb;
int busy=0;
unsigned long flags;
adapter = (adapter_t *)scmd->device->host->hostdata;
scmd->scsi_done = done;
/*
* Allocate and build a SCB request
* busy flag will be set if mega_build_cmd() command could not
* allocate scb. We will return non-zero status in that case.
* NOTE: scb can be null even though certain commands completed
* successfully, e.g., MODE_SENSE and TEST_UNIT_READY, we would
* return 0 in that case.
*/
spin_lock_irqsave(&adapter->lock, flags);
scb = mega_build_cmd(adapter, scmd, &busy);
if (!scb)
goto out;
scb->state |= SCB_PENDQ;
list_add_tail(&scb->list, &adapter->pending_list);
/*
* Check if the HBA is in quiescent state, e.g., during a
* delete logical drive opertion. If it is, don't run
* the pending_list.
*/
if (atomic_read(&adapter->quiescent) == 0)
mega_runpendq(adapter);
busy = 0;
out:
spin_unlock_irqrestore(&adapter->lock, flags);
return busy;
}
static DEF_SCSI_QCMD(megaraid_queue)
/**
* mega_allocate_scb()
* @adapter - pointer to our soft state
* @cmd - scsi command from the mid-layer
*
* Allocate a SCB structure. This is the central structure for controller
* commands.
*/
static inline scb_t *
mega_allocate_scb(adapter_t *adapter, Scsi_Cmnd *cmd)
{
struct list_head *head = &adapter->free_list;
scb_t *scb;
/* Unlink command from Free List */
if( !list_empty(head) ) {
scb = list_entry(head->next, scb_t, list);
list_del_init(head->next);
scb->state = SCB_ACTIVE;
scb->cmd = cmd;
scb->dma_type = MEGA_DMA_TYPE_NONE;
return scb;
}
return NULL;
}
/**
* mega_get_ldrv_num()
* @adapter - pointer to our soft state
* @cmd - scsi mid layer command
* @channel - channel on the controller
*
* Calculate the logical drive number based on the information in scsi command
* and the channel number.
*/
static inline int
mega_get_ldrv_num(adapter_t *adapter, Scsi_Cmnd *cmd, int channel)
{
int tgt;
int ldrv_num;
tgt = cmd->device->id;
if ( tgt > adapter->this_id )
tgt--; /* we do not get inquires for initiator id */
ldrv_num = (channel * 15) + tgt;
/*
* If we have a logical drive with boot enabled, project it first
*/
if( adapter->boot_ldrv_enabled ) {
if( ldrv_num == 0 ) {
ldrv_num = adapter->boot_ldrv;
}
else {
if( ldrv_num <= adapter->boot_ldrv ) {
ldrv_num--;
}
}
}
/*
* If "delete logical drive" feature is enabled on this controller.
* Do only if at least one delete logical drive operation was done.
*
* Also, after logical drive deletion, instead of logical drive number,
* the value returned should be 0x80+logical drive id.
*
* These is valid only for IO commands.
*/
if (adapter->support_random_del && adapter->read_ldidmap )
switch (cmd->cmnd[0]) {
case READ_6: /* fall through */
case WRITE_6: /* fall through */
case READ_10: /* fall through */
case WRITE_10:
ldrv_num += 0x80;
}
return ldrv_num;
}
/**
* mega_build_cmd()
* @adapter - pointer to our soft state
* @cmd - Prepare using this scsi command
* @busy - busy flag if no resources
*
* Prepares a command and scatter gather list for the controller. This routine
* also finds out if the commands is intended for a logical drive or a
* physical device and prepares the controller command accordingly.
*
* We also re-order the logical drives and physical devices based on their
* boot settings.
*/
static scb_t *
mega_build_cmd(adapter_t *adapter, Scsi_Cmnd *cmd, int *busy)
{
mega_ext_passthru *epthru;
mega_passthru *pthru;
scb_t *scb;
mbox_t *mbox;
long seg;
char islogical;
int max_ldrv_num;
int channel = 0;
int target = 0;
int ldrv_num = 0; /* logical drive number */
/*
* filter the internal and ioctl commands
*/
if((cmd->cmnd[0] == MEGA_INTERNAL_CMD))
return (scb_t *)cmd->host_scribble;
/*
* We know what channels our logical drives are on - mega_find_card()
*/
islogical = adapter->logdrv_chan[cmd->device->channel];
/*
* The theory: If physical drive is chosen for boot, all the physical
* devices are exported before the logical drives, otherwise physical
* devices are pushed after logical drives, in which case - Kernel sees
* the physical devices on virtual channel which is obviously converted
* to actual channel on the HBA.
*/
if( adapter->boot_pdrv_enabled ) {
if( islogical ) {
/* logical channel */
channel = cmd->device->channel -
adapter->product_info.nchannels;
}
else {
/* this is physical channel */
channel = cmd->device->channel;
target = cmd->device->id;
/*
* boot from a physical disk, that disk needs to be
* exposed first IF both the channels are SCSI, then
* booting from the second channel is not allowed.
*/
if( target == 0 ) {
target = adapter->boot_pdrv_tgt;
}
else if( target == adapter->boot_pdrv_tgt ) {
target = 0;
}
}
}
else {
if( islogical ) {
/* this is the logical channel */
channel = cmd->device->channel;
}
else {
/* physical channel */
channel = cmd->device->channel - NVIRT_CHAN;
target = cmd->device->id;
}
}
if(islogical) {
/* have just LUN 0 for each target on virtual channels */
if (cmd->device->lun) {
cmd->result = (DID_BAD_TARGET << 16);
cmd->scsi_done(cmd);
return NULL;
}
ldrv_num = mega_get_ldrv_num(adapter, cmd, channel);
max_ldrv_num = (adapter->flag & BOARD_40LD) ?
MAX_LOGICAL_DRIVES_40LD : MAX_LOGICAL_DRIVES_8LD;
/*
* max_ldrv_num increases by 0x80 if some logical drive was
* deleted.
*/
if(adapter->read_ldidmap)
max_ldrv_num += 0x80;
if(ldrv_num > max_ldrv_num ) {
cmd->result = (DID_BAD_TARGET << 16);
cmd->scsi_done(cmd);
return NULL;
}
}
else {
if( cmd->device->lun > 7) {
/*
* Do not support lun >7 for physically accessed
* devices
*/
cmd->result = (DID_BAD_TARGET << 16);
cmd->scsi_done(cmd);
return NULL;
}
}
/*
*
* Logical drive commands
*
*/
if(islogical) {
switch (cmd->cmnd[0]) {
case TEST_UNIT_READY:
#if MEGA_HAVE_CLUSTERING
/*
* Do we support clustering and is the support enabled
* If no, return success always
*/
if( !adapter->has_cluster ) {
cmd->result = (DID_OK << 16);
cmd->scsi_done(cmd);
return NULL;
}
if(!(scb = mega_allocate_scb(adapter, cmd))) {
*busy = 1;
return NULL;
}
scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
scb->raw_mbox[2] = MEGA_RESERVATION_STATUS;
scb->raw_mbox[3] = ldrv_num;
scb->dma_direction = PCI_DMA_NONE;
return scb;
#else
cmd->result = (DID_OK << 16);
cmd->scsi_done(cmd);
return NULL;
#endif
case MODE_SENSE: {
char *buf;
struct scatterlist *sg;
sg = scsi_sglist(cmd);
buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
memset(buf, 0, cmd->cmnd[4]);
kunmap_atomic(buf - sg->offset, KM_IRQ0);
cmd->result = (DID_OK << 16);
cmd->scsi_done(cmd);
return NULL;
}
case READ_CAPACITY:
case INQUIRY:
if(!(adapter->flag & (1L << cmd->device->channel))) {
printk(KERN_NOTICE
"scsi%d: scanning scsi channel %d ",
adapter->host->host_no,
cmd->device->channel);
printk("for logical drives.\n");
adapter->flag |= (1L << cmd->device->channel);
}
/* Allocate a SCB and initialize passthru */
if(!(scb = mega_allocate_scb(adapter, cmd))) {
*busy = 1;
return NULL;
}
pthru = scb->pthru;
mbox = (mbox_t *)scb->raw_mbox;
memset(mbox, 0, sizeof(scb->raw_mbox));
memset(pthru, 0, sizeof(mega_passthru));
pthru->timeout = 0;
pthru->ars = 1;
pthru->reqsenselen = 14;
pthru->islogical = 1;
pthru->logdrv = ldrv_num;
pthru->cdblen = cmd->cmd_len;
memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
if( adapter->has_64bit_addr ) {
mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
}
else {
mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
}
scb->dma_direction = PCI_DMA_FROMDEVICE;
pthru->numsgelements = mega_build_sglist(adapter, scb,
&pthru->dataxferaddr, &pthru->dataxferlen);
mbox->m_out.xferaddr = scb->pthru_dma_addr;
return scb;
case READ_6:
case WRITE_6:
case READ_10:
case WRITE_10:
case READ_12:
case WRITE_12:
/* Allocate a SCB and initialize mailbox */
if(!(scb = mega_allocate_scb(adapter, cmd))) {
*busy = 1;
return NULL;
}
mbox = (mbox_t *)scb->raw_mbox;
memset(mbox, 0, sizeof(scb->raw_mbox));
mbox->m_out.logdrv = ldrv_num;
/*
* A little hack: 2nd bit is zero for all scsi read
* commands and is set for all scsi write commands
*/
if( adapter->has_64bit_addr ) {
mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
MEGA_MBOXCMD_LWRITE64:
MEGA_MBOXCMD_LREAD64 ;
}
else {
mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
MEGA_MBOXCMD_LWRITE:
MEGA_MBOXCMD_LREAD ;
}
/*
* 6-byte READ(0x08) or WRITE(0x0A) cdb
*/
if( cmd->cmd_len == 6 ) {
mbox->m_out.numsectors = (u32) cmd->cmnd[4];
mbox->m_out.lba =
((u32)cmd->cmnd[1] << 16) |
((u32)cmd->cmnd[2] << 8) |
(u32)cmd->cmnd[3];
mbox->m_out.lba &= 0x1FFFFF;
#if MEGA_HAVE_STATS
/*
* Take modulo 0x80, since the logical drive
* number increases by 0x80 when a logical
* drive was deleted
*/
if (*cmd->cmnd == READ_6) {
adapter->nreads[ldrv_num%0x80]++;
adapter->nreadblocks[ldrv_num%0x80] +=
mbox->m_out.numsectors;
} else {
adapter->nwrites[ldrv_num%0x80]++;
adapter->nwriteblocks[ldrv_num%0x80] +=
mbox->m_out.numsectors;
}
#endif
}
/*
* 10-byte READ(0x28) or WRITE(0x2A) cdb
*/
if( cmd->cmd_len == 10 ) {
mbox->m_out.numsectors =
(u32)cmd->cmnd[8] |
((u32)cmd->cmnd[7] << 8);
mbox->m_out.lba =
((u32)cmd->cmnd[2] << 24) |
((u32)cmd->cmnd[3] << 16) |
((u32)cmd->cmnd[4] << 8) |
(u32)cmd->cmnd[5];
#if MEGA_HAVE_STATS
if (*cmd->cmnd == READ_10) {
adapter->nreads[ldrv_num%0x80]++;
adapter->nreadblocks[ldrv_num%0x80] +=
mbox->m_out.numsectors;
} else {
adapter->nwrites[ldrv_num%0x80]++;
adapter->nwriteblocks[ldrv_num%0x80] +=
mbox->m_out.numsectors;
}
#endif
}
/*
* 12-byte READ(0xA8) or WRITE(0xAA) cdb
*/
if( cmd->cmd_len == 12 ) {
mbox->m_out.lba =
((u32)cmd->cmnd[2] << 24) |
((u32)cmd->cmnd[3] << 16) |
((u32)cmd->cmnd[4] << 8) |
(u32)cmd->cmnd[5];
mbox->m_out.numsectors =
((u32)cmd->cmnd[6] << 24) |
((u32)cmd->cmnd[7] << 16) |
((u32)cmd->cmnd[8] << 8) |
(u32)cmd->cmnd[9];
#if MEGA_HAVE_STATS
if (*cmd->cmnd == READ_12) {
adapter->nreads[ldrv_num%0x80]++;
adapter->nreadblocks[ldrv_num%0x80] +=
mbox->m_out.numsectors;
} else {
adapter->nwrites[ldrv_num%0x80]++;
adapter->nwriteblocks[ldrv_num%0x80] +=
mbox->m_out.numsectors;
}
#endif
}
/*
* If it is a read command
*/
if( (*cmd->cmnd & 0x0F) == 0x08 ) {
scb->dma_direction = PCI_DMA_FROMDEVICE;
}
else {
scb->dma_direction = PCI_DMA_TODEVICE;
}
/* Calculate Scatter-Gather info */
mbox->m_out.numsgelements = mega_build_sglist(adapter, scb,
(u32 *)&mbox->m_out.xferaddr, (u32 *)&seg);
return scb;
#if MEGA_HAVE_CLUSTERING
case RESERVE: /* Fall through */
case RELEASE:
/*
* Do we support clustering and is the support enabled
*/
if( ! adapter->has_cluster ) {
cmd->result = (DID_BAD_TARGET << 16);
cmd->scsi_done(cmd);
return NULL;
}
/* Allocate a SCB and initialize mailbox */
if(!(scb = mega_allocate_scb(adapter, cmd))) {
*busy = 1;
return NULL;
}
scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
scb->raw_mbox[2] = ( *cmd->cmnd == RESERVE ) ?
MEGA_RESERVE_LD : MEGA_RELEASE_LD;
scb->raw_mbox[3] = ldrv_num;
scb->dma_direction = PCI_DMA_NONE;
return scb;
#endif
default:
cmd->result = (DID_BAD_TARGET << 16);
cmd->scsi_done(cmd);
return NULL;
}
}
/*
* Passthru drive commands
*/
else {
/* Allocate a SCB and initialize passthru */
if(!(scb = mega_allocate_scb(adapter, cmd))) {
*busy = 1;
return NULL;
}
mbox = (mbox_t *)scb->raw_mbox;
memset(mbox, 0, sizeof(scb->raw_mbox));
if( adapter->support_ext_cdb ) {
epthru = mega_prepare_extpassthru(adapter, scb, cmd,
channel, target);
mbox->m_out.cmd = MEGA_MBOXCMD_EXTPTHRU;
mbox->m_out.xferaddr = scb->epthru_dma_addr;
}
else {
pthru = mega_prepare_passthru(adapter, scb, cmd,
channel, target);
/* Initialize mailbox */
if( adapter->has_64bit_addr ) {
mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
}
else {
mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
}
mbox->m_out.xferaddr = scb->pthru_dma_addr;
}
return scb;
}
return NULL;
}
/**
* mega_prepare_passthru()
* @adapter - pointer to our soft state
* @scb - our scsi control block
* @cmd - scsi command from the mid-layer
* @channel - actual channel on the controller
* @target - actual id on the controller.
*
* prepare a command for the scsi physical devices.
*/
static mega_passthru *
mega_prepare_passthru(adapter_t *adapter, scb_t *scb, Scsi_Cmnd *cmd,
int channel, int target)
{
mega_passthru *pthru;
pthru = scb->pthru;
memset(pthru, 0, sizeof (mega_passthru));
/* 0=6sec/1=60sec/2=10min/3=3hrs */
pthru->timeout = 2;
pthru->ars = 1;
pthru->reqsenselen = 14;
pthru->islogical = 0;
pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
pthru->target = (adapter->flag & BOARD_40LD) ?
(channel << 4) | target : target;
pthru->cdblen = cmd->cmd_len;
pthru->logdrv = cmd->device->lun;
memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
/* Not sure about the direction */
scb->dma_direction = PCI_DMA_BIDIRECTIONAL;
/* Special Code for Handling READ_CAPA/ INQ using bounce buffers */
switch (cmd->cmnd[0]) {
case INQUIRY:
case READ_CAPACITY:
if(!(adapter->flag & (1L << cmd->device->channel))) {
printk(KERN_NOTICE
"scsi%d: scanning scsi channel %d [P%d] ",
adapter->host->host_no,
cmd->device->channel, channel);
printk("for physical devices.\n");
adapter->flag |= (1L << cmd->device->channel);
}
/* Fall through */
default:
pthru->numsgelements = mega_build_sglist(adapter, scb,