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
53 int
pci_system_init(void)54 pci_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
79 void
pci_system_init_dev_mem(int fd)80 pci_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 */
92 void
pci_system_cleanup(void)93 pci_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