/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * vlan.h header for common (non-media specific) VLAN declarations.
 */

#ifndef _SYS_VLAN_H
#define _SYS_VLAN_H

#ifdef  __cplusplus
extern "C" {
#endif

#define VLAN_TAGSZ      4

#define VLAN_TPID       0x8100u

#define VLAN_ID_MASK    0x0fffu
#define VLAN_ID_SIZE    12
#define VLAN_ID_SHIFT   0

#define VLAN_CFI_MASK   0x0001u
#define VLAN_CFI_SIZE   1
#define VLAN_CFI_SHIFT  (VLAN_ID_SHIFT + VLAN_ID_SIZE)

#define VLAN_PRI_MASK   0x0007u
#define VLAN_PRI_SIZE   3
#define VLAN_PRI_SHIFT  (VLAN_CFI_SHIFT + VLAN_CFI_SIZE)

#define VLAN_ID_NONE    0
#define VLAN_ID_MIN     1
#define VLAN_ID_MAX     4094

#define VLAN_TCI(pri, cfi, vid) \
        (((pri) << VLAN_PRI_SHIFT) | \
        ((cfi) << VLAN_CFI_SHIFT) | \
        ((vid) << VLAN_ID_SHIFT))

/*
 * Deconstruct a VTAG ...
 */
#define VLAN_PRI(tci)   (((tci) >> VLAN_PRI_SHIFT) & VLAN_PRI_MASK)
#define VLAN_CFI(tci)   (((tci) >> VLAN_CFI_SHIFT) & VLAN_CFI_MASK)
#define VLAN_ID(tci)    (((tci) >> VLAN_ID_SHIFT) & VLAN_ID_MASK)

#define VLAN_BAND_MAP   32

#define VLAN_MBLKPRI(mp)                                \
        ((((mp)->b_band) / VLAN_BAND_MAP) > 7 ? 0 :     \
        (((mp)->b_band) / VLAN_BAND_MAP))

#ifdef  __cplusplus
}
#endif

#endif  /* _SYS_VLAN_H */