xref: /illumos-gate/usr/src/uts/sun4v/sys/vio_common.h (revision 7bd3a2e26cc8569257b88c1691d559138e1d32d0)
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
31 extern "C" {
32 #endif
33 
34 #include <sys/ldc.h>
35 
36 /*
37  * Common header for VIO descriptor ring entries
38  */
39 typedef 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