iPXE
edd.c
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00001 /*
00002  * Copyright (C) 2010 Michael Brown <mbrown@fensystems.co.uk>.
00003  *
00004  * This program is free software; you can redistribute it and/or
00005  * modify it under the terms of the GNU General Public License as
00006  * published by the Free Software Foundation; either version 2 of the
00007  * License, or any later version.
00008  *
00009  * This program is distributed in the hope that it will be useful, but
00010  * WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012  * General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU General Public License
00015  * along with this program; if not, write to the Free Software
00016  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
00017  * 02110-1301, USA.
00018  *
00019  * You can also choose to distribute this program under the terms of
00020  * the Unmodified Binary Distribution Licence (as given in the file
00021  * COPYING.UBDL), provided that you have satisfied its requirements.
00022  */
00023 
00024 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
00025 
00026 #include <errno.h>
00027 #include <ipxe/interface.h>
00028 #include <ipxe/edd.h>
00029 
00030 /** @file
00031  *
00032  * Enhanced Disk Drive specification
00033  *
00034  */
00035 
00036 /**
00037  * Describe a disk device using EDD
00038  *
00039  * @v intf              Interface
00040  * @v type              EDD interface type
00041  * @v path              EDD device path
00042  * @ret rc              Return status code
00043  */
00044 int edd_describe ( struct interface *intf, struct edd_interface_type *type,
00045                    union edd_device_path *path ) {
00046         struct interface *dest;
00047         edd_describe_TYPE ( void * ) *op =
00048                 intf_get_dest_op ( intf, edd_describe, &dest );
00049         void *object = intf_object ( dest );
00050         int rc;
00051 
00052         if ( op ) {
00053                 rc = op ( object, type, path );
00054         } else {
00055                 /* Default is to not support this operation */
00056                 rc = -ENOTSUP;
00057         }
00058 
00059         intf_put ( dest );
00060         return rc;
00061 }