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
|
/*
Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of the GNU Hurd.
The GNU Hurd 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, or (at
your option) any later version.
The GNU Hurd 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.
You should have received a copy of the GNU General Public License
along with the GNU Hurd. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Per-function files implementation.
*
* Implementation of all files repeated for each function.
*/
#include "func_files.h"
#include <assert.h>
#include <sys/io.h>
/* Read or write a block of data from/to the configuration space */
static error_t
config_block_op (struct pci_device *dev, off_t offset, size_t * len,
void *data, pci_io_op_t op)
{
error_t err;
size_t pendent = *len;
pciaddr_t actual = 0;
while (pendent >= 4)
{
err = op (dev, data, offset, 4, &actual);
if (err)
return err;
offset += 4;
data += 4;
pendent -= 4;
}
if (pendent >= 2)
{
err = op (dev, data, offset, 2, &actual);
if (err)
return err;
offset += 2;
data += 2;
pendent -= 2;
}
if (pendent)
{
err = op (dev, data, offset, 1, &actual);
if (err)
return err;
offset++;
data++;
pendent--;
}
*len -= pendent;
return 0;
}
/* Read or write from/to the config file */
error_t
io_config_file (struct pci_device * dev, off_t offset, size_t * len,
void *data, pci_io_op_t op)
{
error_t err;
/* This should never happen */
assert_backtrace (dev != 0);
/* Don't exceed the config space size */
if (offset > PCI_CONFIG_SIZE)
return EINVAL;
if ((offset + *len) > PCI_CONFIG_SIZE)
*len = PCI_CONFIG_SIZE - offset;
pthread_mutex_lock (&fs->pci_conf_lock);
err = config_block_op (dev, offset, len, data, op);
pthread_mutex_unlock (&fs->pci_conf_lock);
return err;
}
/* Read the mapped ROM */
error_t
read_rom_file (struct pci_device * dev, off_t offset, size_t * len,
void *data)
{
void *fullrom;
/* This should never happen */
assert_backtrace (dev != 0);
/* Don't exceed the ROM size */
if (offset > dev->rom_size)
return EINVAL;
if ((offset + *len) > dev->rom_size)
*len = dev->rom_size - offset;
/* Grab the full rom first */
fullrom = calloc(1, dev->rom_size);
pci_device_read_rom(dev, fullrom);
/* Return the requested amount */
memcpy (data, fullrom + offset, *len);
free(fullrom);
return 0;
}
/* Read or write from/to a memory region by using I/O ports */
static error_t
region_block_ioport_op (uint16_t port, off_t offset, size_t * len,
void *data, int read)
{
size_t pending = *len;
while (pending >= 4)
{
/* read == true: read; else: write */
if (read)
*((unsigned int *) data) = inl (port + offset);
else
outl (*((unsigned int *) data), port + offset);
offset += 4;
data += 4;
pending -= 4;
}
if (pending >= 2)
{
if (read)
*((unsigned short *) data) = inw (port + offset);
else
outw (*((unsigned short *) data), port + offset);
offset += 2;
data += 2;
pending -= 2;
}
if (pending)
{
if (read)
*((unsigned char *) data) = inb (port + offset);
else
outb (*((unsigned char *) data), port + offset);
offset++;
data++;
pending--;
}
*len -= pending;
return 0;
}
/* Read or write from/to a region file */
error_t
io_region_file (struct pcifs_dirent * e, off_t offset, size_t * len,
void *data, int read)
{
size_t reg_num;
struct pci_mem_region *region;
/* This should never happen */
assert_backtrace (e->device != 0);
/* Get the region */
reg_num = strtol (&e->name[strlen (e->name) - 1], 0, 16);
region = &e->device->regions[reg_num];
/* Don't exceed the region size */
if (offset > region->size)
return EINVAL;
if ((offset + *len) > region->size)
*len = region->size - offset;
if (region->is_IO)
region_block_ioport_op (region->base_addr, offset, len, data, read);
else if (read)
memcpy (data, region->memory + offset, *len);
else
memcpy (region->memory + offset, data, *len);
return 0;
}
|
