xref: /titanic_51/usr/src/uts/sun4v/sys/vnet.h (revision 3bf5ae9eedb977fad5c8a4029f296a9ec010c06e)
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 2006 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #ifndef _VNET_H
28 #define	_VNET_H
29 
30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
31 
32 #ifdef __cplusplus
33 extern "C" {
34 #endif
35 
36 #define	VNET_SUCCESS		(0)	/* successful return */
37 #define	VNET_FAILURE		(-1)	/* unsuccessful return */
38 
39 #define	KMEM_FREE(_p)		kmem_free((_p), sizeof (*(_p)))
40 
41 #define	VNET_NTXDS		512		/* power of 2 tx descriptors */
42 #define	VNET_RECLAIM_LOWAT	32		/* tx reclaim low watermark */
43 #define	VNET_RECLAIM_HIWAT	(512 - 32)	/* tx reclaim high watermark */
44 #define	VNET_LDCWD_INTERVAL	1000		/* watchdog freq in msec */
45 #define	VNET_LDCWD_TXTIMEOUT	1000		/* tx timeout in msec */
46 #define	VNET_LDC_MTU		64		/* ldc mtu */
47 #define	VNET_NRBUFS		512		/* number of receive bufs */
48 
49 /*
50  * vnet proxy transport layer information. There is one instance of this for
51  * every transport being used by a vnet device and a list of these transports
52  * is maintained by vnet.
53  */
54 typedef struct vp_tl {
55 	struct vp_tl		*nextp;			/* next in list */
56 	mac_register_t		*macp;			/* transport ops */
57 	char			name[LIFNAMSIZ];	/* device name */
58 	major_t			major;			/* driver major # */
59 	uint_t			instance;		/* dev instance */
60 } vp_tl_t;
61 
62 /*
63  * Forwarding database (FDB) entry, used by vnet to provide switching
64  * functionality. Each fdb entry corresponds to a destination vnet device
65  * within the ldoms which is directly reachable by invoking a transmit
66  * function provided by a vnet proxy transport layer. Currently, the generic
67  * transport layer adds/removes/modifies entries in fdb.
68  */
69 typedef struct fdb {
70 	struct fdb	*nextp;			/* next entry in the list */
71 	uint8_t		macaddr[ETHERADDRL];	/* destination mac address */
72 	mac_tx_t	m_tx;			/* transmit function */
73 	void		*txarg;			/* arg to the transmit func */
74 } fdb_t;
75 
76 /* FDB hash queue head */
77 typedef struct fdbf_s {
78 	fdb_t		*headp;			/* head of fdb entries */
79 	krwlock_t	rwlock;			/* protect the list */
80 } fdb_fanout_t;
81 
82 #define	VNET_NFDB_HASH	4	/* default number of hash queues in fdb */
83 #define	VNET_NFDB_HASH_MAX 32	/* max number of hash queues in fdb */
84 
85 /* Hash calculation using the mac address */
86 #define	MACHASH(a, n)	((*(((uchar_t *)(a)) + 0) ^		\
87 			*(((uchar_t *)(a)) + 1) ^		\
88 			*(((uchar_t *)(a)) + 2) ^		\
89 			*(((uchar_t *)(a)) + 3) ^		\
90 			*(((uchar_t *)(a)) + 4) ^		\
91 			*(((uchar_t *)(a)) + 5)) % (uint32_t)n)
92 
93 /* rwlock macros */
94 #define	READ_ENTER(x)	rw_enter(x, RW_READER)
95 #define	WRITE_ENTER(x)	rw_enter(x, RW_WRITER)
96 #define	RW_EXIT(x)	rw_exit(x)
97 
98 /*
99  * vnet instance state information
100  */
101 typedef struct vnet {
102 	int			instance;	/* instance # */
103 	dev_info_t		*dip;		/* dev_info */
104 	struct vnet		*nextp;		/* next in list */
105 	mac_handle_t 		mh;		/* handle to GLDv3 mac module */
106 	uchar_t			vendor_addr[ETHERADDRL]; /* orig macadr */
107 	uchar_t			curr_macaddr[ETHERADDRL]; /* current macadr */
108 	vp_tl_t			*tlp;		/* list of vp_tl */
109 	krwlock_t		trwlock;	/* lock for vp_tl list */
110 	char			vgen_name[MAXNAMELEN];	/* name of generic tl */
111 	fdb_fanout_t		*fdbhp;		/* fdb hash queues */
112 	int			nfdb_hash;	/* num fdb hash queues */
113 } vnet_t;
114 
115 #ifdef __cplusplus
116 }
117 #endif
118 
119 #endif	/* _VNET_H */
120