vio_common.h revision 12011:2377022c7a2d 
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#ifndef _SYS_VIO_COMMON_H
28#define	_SYS_VIO_COMMON_H
29
30#ifdef __cplusplus
31extern "C" {
32#endif
33
34#include <sys/ldc.h>
35
36/*
37 * Common header for VIO descriptor ring entries
38 */
39typedef struct vio_dring_entry_hdr {
40	uint8_t		dstate;		/* Current state of Dring entry */
41	uint8_t		ack:1;		/* 1 => receiver must ACK when DONE */
42
43	/*
44	 * Padding.
45	 */
46	uint16_t	resv[3];
47} vio_dring_entry_hdr_t;
48
49/*
50 * Common macros for acquiring and releasing VIO descriptor ring entries
51 */
52#define	VIO_DRING_ACQUIRE(otd, mtype, handle, start, stop)		\
53	((mtype) == LDC_DIRECT_MAP ?					\
54	LDC_ON_TRAP((otd)) :						\
55	ldc_mem_dring_acquire((handle), (start), (stop)))
56
57#define	VIO_DRING_ACQUIRE_NOCOPYIN(otd, mtype)				\
58	((mtype) == LDC_DIRECT_MAP ?					\
59	LDC_ON_TRAP((otd)) : 0)
60
61#define	VIO_DRING_RELEASE(mtype, handle, start, stop)			\
62	((mtype) == LDC_DIRECT_MAP ?					\
63	LDC_NO_TRAP() :							\
64	ldc_mem_dring_release((handle), (start), (stop)))
65
66#define	VIO_DRING_RELEASE_NOCOPYOUT(mtype)				\
67	((mtype) == LDC_DIRECT_MAP ?					\
68	LDC_NO_TRAP() : 0)
69
70#ifdef __cplusplus
71}
72#endif
73
74#endif	/* _SYS_VIO_COMMON_H */
75