common_init.c revision 5ad99bdf 
1/*
2 * (C) Copyright IBM Corporation 2006
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * on the rights to use, copy, modify, merge, publish, distribute, sub
9 * license, and/or sell copies of the Software, and to permit persons to whom
10 * the Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
19 * IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 */
24
25/**
26 * \file common_init.c
27 * Platform independent routines for initializing access to the PCI system.
28 *
29 * \author Ian Romanick <idr@us.ibm.com>
30 */
31#ifdef HAVE_CONFIG_H
32#include "config.h"
33#endif
34
35#include <stdlib.h>
36#include <errno.h>
37
38#include "pciaccess.h"
39#include "pciaccess_private.h"
40
41_pci_hidden struct pci_system * pci_sys;
42
43/**
44 * Initialize the PCI subsystem for access.
45 *
46 * \return
47 * Zero on success or an errno value on failure.  In particular, if no
48 * platform-specific initializers are available, \c ENOSYS will be returned.
49 *
50 * \sa pci_system_cleanup
51 */
52
53int
54pci_system_init( void )
55{
56    int err = ENOSYS;
57
58#ifdef __linux__
59    err = pci_system_linux_sysfs_create();
60#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
61    err = pci_system_freebsd_create();
62#elif defined(__NetBSD__)
63    err = pci_system_netbsd_create();
64#elif defined(__OpenBSD__)
65    err = pci_system_openbsd_create();
66#elif defined(__sun)
67    err = pci_system_solx_devfs_create();
68#elif defined(__GNU__)
69    err = pci_system_hurd_create();
70#elif defined(__CYGWIN__)
71    err = pci_system_x86_create();
72#else
73# error "Unsupported OS"
74#endif
75
76    return err;
77}
78
79void
80pci_system_init_dev_mem(int fd)
81{
82#if defined(__OpenBSD__)
83    pci_system_openbsd_init_dev_mem(fd);
84#endif
85}
86
87/**
88 * Shutdown all access to the PCI subsystem.
89 *
90 * \sa pci_system_init
91 */
92void
93pci_system_cleanup( void )
94{
95    unsigned i;
96    unsigned j;
97
98
99    if ( pci_sys == NULL ) {
100	return;
101    }
102
103    pci_io_cleanup();
104
105    if ( pci_sys->devices ) {
106	for ( i = 0 ; i < pci_sys->num_devices ; i++ ) {
107	    for ( j = 0 ; j < 6 ; j++ ) {
108		(void) pci_device_unmap_region( & pci_sys->devices[i].base, j );
109	    }
110
111	    free( (char *) pci_sys->devices[i].device_string );
112	    free( (char *) pci_sys->devices[i].agp );
113
114	    pci_sys->devices[i].device_string = NULL;
115	    pci_sys->devices[i].agp = NULL;
116
117	    if ( pci_sys->methods->destroy_device != NULL ) {
118		(*pci_sys->methods->destroy_device)( & pci_sys->devices[i].base );
119	    }
120	}
121
122	free( pci_sys->devices );
123	pci_sys->devices = NULL;
124	pci_sys->num_devices = 0;
125    }
126
127    if ( pci_sys->methods->destroy != NULL ) {
128	(*pci_sys->methods->destroy)();
129    }
130
131    free( pci_sys );
132    pci_sys = NULL;
133}
134