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
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1990, 2010, Oracle and/or its affiliates. All rights reserved.
*/
/*
*
* Generic Capabilities Routines
*
*/
#include <sys/scsi/scsi.h>
#ifdef __x86
#include <sys/ddi_isa.h>
#endif
#define A_TO_TRAN(ap) (ap->a_hba_tran)
int
scsi_ifgetcap(struct scsi_address *ap, char *cap, int whom)
{
int capability;
#ifdef __x86
ddi_dma_attr_t *dmaattr;
int ckey;
#endif
capability = (*A_TO_TRAN(ap)->tran_getcap)(ap, cap, whom);
#ifdef __x86
if (cap != NULL) {
ckey = scsi_hba_lookup_capstr(cap);
dmaattr = &ap->a_hba_tran->tran_dma_attr;
switch (ckey) {
case SCSI_CAP_DMA_MAX:
/*
* If the HBA is unable to reach all the memory in
* the system, the maximum copy buffer size may limit
* the size of the max DMA.
*/
if (i_ddi_copybuf_required(dmaattr)) {
capability = MIN(capability,
i_ddi_copybuf_size());
}
/*
* make sure the value we return is a whole multiple of
* the granlarity.
*/
if (dmaattr->dma_attr_granular > 1) {
capability = capability -
(capability % dmaattr->dma_attr_granular);
}
break;
case SCSI_CAP_DMA_MAX_ARCH:
capability = i_ddi_dma_max(ap->a_hba_tran->tran_hba_dip,
dmaattr);
break;
/*FALLTHROUGH*/
}
}
#endif
return (capability);
}
int
scsi_ifsetcap(struct scsi_address *ap, char *cap, int value, int whom)
{
int rval;
int cidx;
rval = (*A_TO_TRAN(ap)->tran_setcap)(ap, cap, value, whom);
if ((rval == 1) || A_TO_TRAN(ap)->tran_setup_pkt) {
cidx = scsi_hba_lookup_capstr(cap);
if (cidx == SCSI_CAP_SECTOR_SIZE) {
/*
* if we have successfully changed the
* granularity update SCSA's copy
*/
A_TO_TRAN(ap)->tran_dma_attr.dma_attr_granular =
value;
}
}
return (rval);
}
|
