Initial import of libpciaccess.

1 files changed, 111 insertions, 0 deletions

diff --git a/src/common_init.c b/src/common_init.c
new file mode 100644
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--- /dev/null
+++ b/src/common_init.c
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+/*
+ * (C) Copyright IBM Corporation 2006
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
+ * IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * \file common_init.c
+ * Platform independent routines for initializing access to the PCI system.
+ *
+ * \author Ian Romanick <idr@us.ibm.com>
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+
+#include "pciaccess.h"
+#include "pciaccess_private.h"
+
+extern int pci_system_linux_sysfs_create( void );
+
+struct pci_system * pci_sys;
+
+/**
+ * Initialize the PCI subsystem for access.
+ * 
+ * \return
+ * Zero on success or an errno value on failure.  In particular, if no
+ * platform-specific initializers are available, \c ENOSYS will be returned.
+ *
+ * \sa pci_system_cleanup
+ */
+
+int
+pci_system_init( void )
+{
+    int err = ENOSYS;
+    
+#ifdef linux
+    err = pci_system_linux_sysfs_create();
+#endif
+
+    return err;
+}
+
+
+/**
+ * Shutdown all access to the PCI subsystem.
+ * 
+ * \sa pci_system_init
+ */
+void
+pci_system_cleanup( void )
+{
+    unsigned i;
+    unsigned j;
+
+
+    if ( pci_sys == NULL ) {
+	return;
+    }
+
+
+    if ( pci_sys->devices ) {
+	for ( i = 0 ; i < pci_sys->num_devices ; i++ ) {
+	    for ( j = 0 ; j < 6 ; j++ ) {
+		(void) pci_device_unmap_region( & pci_sys->devices[i].base, j );
+	    }
+
+	    free( (char *) pci_sys->devices[i].device_string );
+	    free( (char *) pci_sys->devices[i].agp );
+	    
+	    pci_sys->devices[i].device_string = NULL;
+	    pci_sys->devices[i].agp = NULL;
+
+	    if ( pci_sys->methods->destroy_device != NULL ) {
+		(*pci_sys->methods->destroy_device)( & pci_sys->devices[i].base );
+	    }
+	}
+	
+	free( pci_sys->devices );
+	pci_sys->devices = NULL;
+	pci_sys->num_devices = 0;
+    }
+
+
+    if ( pci_sys->methods->destroy != NULL ) {
+	(*pci_sys->methods->destroy)();
+    }
+    
+    free( pci_sys );
+    pci_sys = NULL;
+}