File: common_init.c

package info (click to toggle)
libpciaccess 0.14-1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster, sid
  • size: 2,248 kB
  • sloc: ansic: 6,611; sh: 4,188; makefile: 79
file content (131 lines) | stat: -rw-r--r-- 3,384 bytes parent folder | download
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
/*
 * (C) Copyright IBM Corporation 2006
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * on the rights to use, copy, modify, merge, publish, distribute, sub
 * license, and/or sell copies of the Software, and to permit persons to whom
 * the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
 * IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

/**
 * \file common_init.c
 * Platform independent routines for initializing access to the PCI system.
 *
 * \author Ian Romanick <idr@us.ibm.com>
 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdlib.h>
#include <errno.h>

#include "pciaccess.h"
#include "pciaccess_private.h"

_pci_hidden struct pci_system * pci_sys;

/**
 * Initialize the PCI subsystem for access.
 *
 * \return
 * Zero on success or an errno value on failure.  In particular, if no
 * platform-specific initializers are available, \c ENOSYS will be returned.
 *
 * \sa pci_system_cleanup
 */

int
pci_system_init( void )
{
    int err = ENOSYS;

#ifdef __linux__
    err = pci_system_linux_sysfs_create();
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
    err = pci_system_freebsd_create();
#elif defined(__NetBSD__)
    err = pci_system_netbsd_create();
#elif defined(__OpenBSD__)
    err = pci_system_openbsd_create();
#elif defined(__sun)
    err = pci_system_solx_devfs_create();
#elif defined(__GNU__) || defined(__CYGWIN__)
    err = pci_system_x86_create();
#else
# error "Unsupported OS"
#endif

    return err;
}

void
pci_system_init_dev_mem(int fd)
{
#ifdef __OpenBSD__
    pci_system_openbsd_init_dev_mem(fd);
#endif
}

/**
 * Shutdown all access to the PCI subsystem.
 *
 * \sa pci_system_init
 */
void
pci_system_cleanup( void )
{
    unsigned i;
    unsigned j;


    if ( pci_sys == NULL ) {
	return;
    }

    pci_io_cleanup();

    if ( pci_sys->devices ) {
	for ( i = 0 ; i < pci_sys->num_devices ; i++ ) {
	    for ( j = 0 ; j < 6 ; j++ ) {
		(void) pci_device_unmap_region( & pci_sys->devices[i].base, j );
	    }

	    free( (char *) pci_sys->devices[i].device_string );
	    free( (char *) pci_sys->devices[i].agp );

	    pci_sys->devices[i].device_string = NULL;
	    pci_sys->devices[i].agp = NULL;

	    if ( pci_sys->methods->destroy_device != NULL ) {
		(*pci_sys->methods->destroy_device)( & pci_sys->devices[i].base );
	    }
	}

	free( pci_sys->devices );
	pci_sys->devices = NULL;
	pci_sys->num_devices = 0;
    }

    if ( pci_sys->methods->destroy != NULL ) {
	(*pci_sys->methods->destroy)();
    }

    free( pci_sys );
    pci_sys = NULL;
}