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/drivers/staging/octeon/cvmx-packet.h

https://bitbucket.org/cyanogenmod/android_kernel_asus_tf300t
C Header | 65 lines | 14 code | 4 blank | 47 comment | 0 complexity | a285386eeb7e055f0406fce09326933d MD5 | raw file
Possible License(s): LGPL-2.0, AGPL-1.0, GPL-2.0
 1/***********************license start***************
 2 * Author: Cavium Networks
 3 *
 4 * Contact: support@caviumnetworks.com
 5 * This file is part of the OCTEON SDK
 6 *
 7 * Copyright (c) 2003-2008 Cavium Networks
 8 *
 9 * This file is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License, Version 2, as
11 * published by the Free Software Foundation.
12 *
13 * This file is distributed in the hope that it will be useful, but
14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
16 * NONINFRINGEMENT.  See the GNU General Public License for more
17 * details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this file; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 * or visit http://www.gnu.org/licenses/.
23 *
24 * This file may also be available under a different license from Cavium.
25 * Contact Cavium Networks for more information
26 ***********************license end**************************************/
27
28/**
29 *
30 * Packet buffer defines.
31 */
32
33#ifndef __CVMX_PACKET_H__
34#define __CVMX_PACKET_H__
35
36/**
37 * This structure defines a buffer pointer on Octeon
38 */
39union cvmx_buf_ptr {
40	void *ptr;
41	uint64_t u64;
42	struct {
43		/*
44		 * if set, invert the "free" pick of the overall
45		 * packet. HW always sets this bit to 0 on inbound
46		 * packet
47		 */
48		uint64_t i:1;
49		/*
50		 * Indicates the amount to back up to get to the
51		 * buffer start in cache lines. In most cases this is
52		 * less than one complete cache line, so the value is
53		 * zero.
54		 */
55		uint64_t back:4;
56		/* The pool that the buffer came from / goes to */
57		uint64_t pool:3;
58		/* The size of the segment pointed to by addr (in bytes) */
59		uint64_t size:16;
60		/* Pointer to the first byte of the data, NOT buffer */
61		uint64_t addr:40;
62	} s;
63};
64
65#endif /*  __CVMX_PACKET_H__ */