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      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  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
     23  * Use is subject to license terms.
     24  */
     25 
     26 /*
     27  * vlan.h header for common (non-media specific) VLAN declarations.
     28  */
     29 
     30 #ifndef	_SYS_VLAN_H
     31 #define	_SYS_VLAN_H
     32 
     33 #ifdef	__cplusplus
     34 extern "C" {
     35 #endif
     36 
     37 #define	VLAN_TAGSZ	4
     38 
     39 #define	VLAN_TPID	0x8100u
     40 
     41 #define	VLAN_ID_MASK	0x0fffu
     42 #define	VLAN_ID_SIZE	12
     43 #define	VLAN_ID_SHIFT	0
     44 
     45 #define	VLAN_CFI_MASK	0x0001u
     46 #define	VLAN_CFI_SIZE	1
     47 #define	VLAN_CFI_SHIFT	(VLAN_ID_SHIFT + VLAN_ID_SIZE)
     48 
     49 #define	VLAN_PRI_MASK	0x0007u
     50 #define	VLAN_PRI_SIZE	3
     51 #define	VLAN_PRI_SHIFT	(VLAN_CFI_SHIFT + VLAN_CFI_SIZE)
     52 
     53 #define	VLAN_ID_NONE	0
     54 #define	VLAN_ID_MIN	1
     55 #define	VLAN_ID_MAX	4094
     56 
     57 #define	VLAN_TCI(pri, cfi, vid) \
     58 	(((pri) << VLAN_PRI_SHIFT) | \
     59 	((cfi) << VLAN_CFI_SHIFT) | \
     60 	((vid) << VLAN_ID_SHIFT))
     61 
     62 /*
     63  * Deconstruct a VTAG ...
     64  */
     65 #define	VLAN_PRI(tci)	(((tci) >> VLAN_PRI_SHIFT) & VLAN_PRI_MASK)
     66 #define	VLAN_CFI(tci)	(((tci) >> VLAN_CFI_SHIFT) & VLAN_CFI_MASK)
     67 #define	VLAN_ID(tci)	(((tci) >> VLAN_ID_SHIFT) & VLAN_ID_MASK)
     68 
     69 #define	VLAN_BAND_MAP	32
     70 
     71 #define	VLAN_MBLKPRI(mp)				\
     72 	((((mp)->b_band) / VLAN_BAND_MAP) > 7 ? 0 :	\
     73 	(((mp)->b_band) / VLAN_BAND_MAP))
     74 
     75 #ifdef	__cplusplus
     76 }
     77 #endif
     78 
     79 #endif	/* _SYS_VLAN_H */
     80