common_init.c revision 6a94483f 
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
32#include <stdlib.h>
33#include <errno.h>
34
35#include "pciaccess.h"
36#include "pciaccess_private.h"
37
38_pci_hidden struct pci_system * pci_sys;
39
40/**
41 * Initialize the PCI subsystem for access.
42 *
43 * \return
44 * Zero on success or an errno value on failure.  In particular, if no
45 * platform-specific initializers are available, \c ENOSYS will be returned.
46 *
47 * \sa pci_system_cleanup
48 */
49
50int
51pci_system_init( void )
52{
53    int err = ENOSYS;
54
55#ifdef __linux__
56    err = pci_system_linux_sysfs_create();
57#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
58    err = pci_system_freebsd_create();
59#elif defined(__NetBSD__)
60    err = pci_system_netbsd_create();
61#elif defined(__OpenBSD__)
62    err = pci_system_openbsd_create();
63#elif defined(__sun)
64    err = pci_system_solx_devfs_create();
65#elif defined(__GNU__) || defined(__CYGWIN__)
66    err = pci_system_x86_create();
67#else
68# error "Unsupported OS"
69#endif
70
71    return err;
72}
73
74void
75pci_system_init_dev_mem(int fd)
76{
77#ifdef __OpenBSD__
78    pci_system_openbsd_init_dev_mem(fd);
79#endif
80}
81
82/**
83 * Shutdown all access to the PCI subsystem.
84 *
85 * \sa pci_system_init
86 */
87void
88pci_system_cleanup( void )
89{
90    unsigned i;
91    unsigned j;
92
93
94    if ( pci_sys == NULL ) {
95	return;
96    }
97
98    pci_io_cleanup();
99
100    if ( pci_sys->devices ) {
101	for ( i = 0 ; i < pci_sys->num_devices ; i++ ) {
102	    for ( j = 0 ; j < 6 ; j++ ) {
103		(void) pci_device_unmap_region( & pci_sys->devices[i].base, j );
104	    }
105
106	    free( (char *) pci_sys->devices[i].device_string );
107	    free( (char *) pci_sys->devices[i].agp );
108
109	    pci_sys->devices[i].device_string = NULL;
110	    pci_sys->devices[i].agp = NULL;
111
112	    if ( pci_sys->methods->destroy_device != NULL ) {
113		(*pci_sys->methods->destroy_device)( & pci_sys->devices[i].base );
114	    }
115	}
116
117	free( pci_sys->devices );
118	pci_sys->devices = NULL;
119	pci_sys->num_devices = 0;
120    }
121
122    if ( pci_sys->methods->destroy != NULL ) {
123	(*pci_sys->methods->destroy)();
124    }
125
126    free( pci_sys );
127    pci_sys = NULL;
128}
129