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 <[email protected]>
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
50 int
pci_system_init(void)51 pci_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__)
66 err = pci_system_x86_create();
67 #endif
68
69 return err;
70 }
71
72 void
pci_system_init_dev_mem(int fd)73 pci_system_init_dev_mem(int fd)
74 {
75 #ifdef __OpenBSD__
76 pci_system_openbsd_init_dev_mem(fd);
77 #endif
78 }
79
80 /**
81 * Shutdown all access to the PCI subsystem.
82 *
83 * \sa pci_system_init
84 */
85 void
pci_system_cleanup(void)86 pci_system_cleanup( void )
87 {
88 unsigned i;
89 unsigned j;
90
91
92 if ( pci_sys == NULL ) {
93 return;
94 }
95
96 pci_io_cleanup();
97
98 if ( pci_sys->devices ) {
99 for ( i = 0 ; i < pci_sys->num_devices ; i++ ) {
100 for ( j = 0 ; j < 6 ; j++ ) {
101 (void) pci_device_unmap_region( & pci_sys->devices[i].base, j );
102 }
103
104 free( (char *) pci_sys->devices[i].device_string );
105 free( (char *) pci_sys->devices[i].agp );
106
107 pci_sys->devices[i].device_string = NULL;
108 pci_sys->devices[i].agp = NULL;
109
110 if ( pci_sys->methods->destroy_device != NULL ) {
111 (*pci_sys->methods->destroy_device)( & pci_sys->devices[i].base );
112 }
113 }
114
115 free( pci_sys->devices );
116 pci_sys->devices = NULL;
117 pci_sys->num_devices = 0;
118 }
119
120
121 if ( pci_sys->methods->destroy != NULL ) {
122 (*pci_sys->methods->destroy)();
123 }
124
125 free( pci_sys );
126 pci_sys = NULL;
127 }
128