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
|
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <pcmcia/ss.h>
#include <pcmcia/cistpl.h>
#include "cs_internal.h"
struct pcmcia_align_data {
unsigned long mask;
unsigned long offset;
};
static resource_size_t pcmcia_align(void *align_data,
const struct resource *res,
resource_size_t size, resource_size_t align)
{
struct pcmcia_align_data *data = align_data;
resource_size_t start;
start = (res->start & ~data->mask) + data->offset;
if (start < res->start)
start += data->mask + 1;
return start;
}
static struct resource *find_io_region(struct pcmcia_socket *s,
unsigned long base, int num,
unsigned long align)
{
struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_IO,
dev_name(&s->dev));
struct pcmcia_align_data data;
int ret;
data.mask = align - 1;
data.offset = base & data.mask;
ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1,
base, 0, pcmcia_align, &data);
if (ret != 0) {
kfree(res);
res = NULL;
}
return res;
}
static int res_pci_find_io(struct pcmcia_socket *s, unsigned int attr,
unsigned int *base, unsigned int num,
unsigned int align, struct resource **parent)
{
int i, ret = 0;
/* Check for an already-allocated window that must conflict with
* what was asked for. It is a hack because it does not catch all
* potential conflicts, just the most obvious ones.
*/
for (i = 0; i < MAX_IO_WIN; i++) {
if (!s->io[i].res)
continue;
if (!*base)
continue;
if ((s->io[i].res->start & (align-1)) == *base)
return -EBUSY;
}
for (i = 0; i < MAX_IO_WIN; i++) {
struct resource *res = s->io[i].res;
unsigned int try;
if (res && (res->flags & IORESOURCE_BITS) !=
(attr & IORESOURCE_BITS))
continue;
if (!res) {
if (align == 0)
align = 0x10000;
res = s->io[i].res = find_io_region(s, *base, num,
align);
if (!res)
return -EINVAL;
*base = res->start;
s->io[i].res->flags =
((res->flags & ~IORESOURCE_BITS) |
(attr & IORESOURCE_BITS));
s->io[i].InUse = num;
*parent = res;
return 0;
}
/* Try to extend top of window */
try = res->end + 1;
if ((*base == 0) || (*base == try)) {
ret = adjust_resource(s->io[i].res, res->start,
resource_size(res) + num);
if (ret)
continue;
*base = try;
s->io[i].InUse += num;
*parent = res;
return 0;
}
/* Try to extend bottom of window */
try = res->start - num;
if ((*base == 0) || (*base == try)) {
ret = adjust_resource(s->io[i].res,
res->start - num,
resource_size(res) + num);
if (ret)
continue;
*base = try;
s->io[i].InUse += num;
*parent = res;
return 0;
}
}
return -EINVAL;
}
static struct resource *res_pci_find_mem(u_long base, u_long num,
u_long align, int low, struct pcmcia_socket *s)
{
struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_MEM,
dev_name(&s->dev));
struct pcmcia_align_data data;
unsigned long min;
int ret;
if (align < 0x20000)
align = 0x20000;
data.mask = align - 1;
data.offset = base & data.mask;
min = 0;
if (!low)
min = 0x100000UL;
ret = pci_bus_alloc_resource(s->cb_dev->bus,
res, num, 1, min, 0,
pcmcia_align, &data);
if (ret != 0) {
kfree(res);
res = NULL;
}
return res;
}
static int res_pci_init(struct pcmcia_socket *s)
{
if (!s->cb_dev || !(s->features & SS_CAP_PAGE_REGS)) {
dev_err(&s->dev, "not supported by res_pci\n");
return -EOPNOTSUPP;
}
return 0;
}
struct pccard_resource_ops pccard_nonstatic_ops = {
.validate_mem = NULL,
.find_io = res_pci_find_io,
.find_mem = res_pci_find_mem,
.init = res_pci_init,
.exit = NULL,
};
EXPORT_SYMBOL(pccard_nonstatic_ops);
|
