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 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 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__) 58 err = pci_system_freebsd_create(); 59 #elif defined(__sun) 60 err = pci_system_solx_devfs_create(); 61 #endif 62 63 return err; 64 } 65 66 67 /** 68 * Shutdown all access to the PCI subsystem. 69 * 70 * \sa pci_system_init 71 */ 72 void 73 pci_system_cleanup( void ) 74 { 75 unsigned i; 76 unsigned j; 77 78 79 if ( pci_sys == NULL ) { 80 return; 81 } 82 83 84 if ( pci_sys->devices ) { 85 for ( i = 0 ; i < pci_sys->num_devices ; i++ ) { 86 for ( j = 0 ; j < 6 ; j++ ) { 87 (void) pci_device_unmap_region( & pci_sys->devices[i].base, j ); 88 } 89 90 free( (char *) pci_sys->devices[i].device_string ); 91 free( (char *) pci_sys->devices[i].agp ); 92 93 pci_sys->devices[i].device_string = NULL; 94 pci_sys->devices[i].agp = NULL; 95 96 if ( pci_sys->methods->destroy_device != NULL ) { 97 (*pci_sys->methods->destroy_device)( & pci_sys->devices[i].base ); 98 } 99 } 100 101 free( pci_sys->devices ); 102 pci_sys->devices = NULL; 103 pci_sys->num_devices = 0; 104 } 105 106 107 if ( pci_sys->methods->destroy != NULL ) { 108 (*pci_sys->methods->destroy)(); 109 } 110 111 free( pci_sys ); 112 pci_sys = NULL; 113 } 114