iobpad.c revision a734c64bff58bda2fa48c2795453e092167b0ff7
/*
* Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
*
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/**
* @file
*
* I/O buffer padding
*
*/
#include <string.h>
/**
* Pad I/O buffer
*
* @v iobuf I/O buffer
* @v min_len Minimum length
*
* This function pads and aligns I/O buffers, for devices that
* aren't capable of padding in hardware, or that require specific
* alignment in TX buffers. The packet data will end up aligned to a
* multiple of @c IOB_ALIGN.
*
* @c min_len must not exceed @v IOB_ZLEN.
*/
void *data;
signed int pad_len;
/* Move packet data to start of I/O buffer. This will both
* align the data (since I/O buffers are aligned to
* IOB_ALIGN) and give us sufficient space for the
* zero-padding
*/
/* Pad to minimum packet length */
if ( pad_len > 0 )
}