diff options
Diffstat (limited to 'qemu/roms/ipxe/src/net/iobpad.c')
-rw-r--r-- | qemu/roms/ipxe/src/net/iobpad.c | 73 |
1 files changed, 0 insertions, 73 deletions
diff --git a/qemu/roms/ipxe/src/net/iobpad.c b/qemu/roms/ipxe/src/net/iobpad.c deleted file mode 100644 index 936b4bde4..000000000 --- a/qemu/roms/ipxe/src/net/iobpad.c +++ /dev/null @@ -1,73 +0,0 @@ -/* - * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * 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., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); - -/** - * @file - * - * I/O buffer padding - * - */ - -#include <string.h> -#include <ipxe/iobuf.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 iob_pad ( struct io_buffer *iobuf, size_t min_len ) { - void *data; - size_t len; - size_t headroom; - signed int pad_len; - - assert ( min_len <= IOB_ZLEN ); - - /* 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 - */ - data = iobuf->data; - len = iob_len ( iobuf ); - headroom = iob_headroom ( iobuf ); - iob_push ( iobuf, headroom ); - memmove ( iobuf->data, data, len ); - iob_unput ( iobuf, headroom ); - - /* Pad to minimum packet length */ - pad_len = ( min_len - iob_len ( iobuf ) ); - if ( pad_len > 0 ) - memset ( iob_put ( iobuf, pad_len ), 0, pad_len ); -} |