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	1	/*
	2	* Copyright (c) 2011-2012 Apple Inc. All rights reserved.
	3	*
	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
	25	*
	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
	27	*/
	28
	29	/* $NetBSD: altq_rio.h,v 1.5 2006/10/12 19:59:08 peter Exp $ */
	30	/* $KAME: altq_rio.h,v 1.9 2003/07/10 12:07:49 kjc Exp $ */
	31
	32	/*
	33	* Copyright (C) 1998-2003
	34	* Sony Computer Science Laboratories Inc. All rights reserved.
	35	*
	36	* Redistribution and use in source and binary forms, with or without
	37	* modification, are permitted provided that the following conditions
	38	* are met:
	39	* 1. Redistributions of source code must retain the above copyright
	40	* notice, this list of conditions and the following disclaimer.
	41	* 2. Redistributions in binary form must reproduce the above copyright
	42	* notice, this list of conditions and the following disclaimer in the
	43	* documentation and/or other materials provided with the distribution.
	44	*
	45	* THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND
	46	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	47	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	48	* ARE DISCLAIMED. IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE
	49	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	50	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	51	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	52	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	53	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	54	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	55	* SUCH DAMAGE.
	56	*/
	57
	58	#ifndef _NET_CLASSQ_CLASSQ_RIO_H_
	59	#define _NET_CLASSQ_CLASSQ_RIO_H_
	60
	61	#ifdef PRIVATE
	62	#ifdef BSD_KERNEL_PRIVATE
	63	#include <net/classq/if_classq.h>
	64	#endif /* BSD_KERNEL_PRIVATE */
	65
	66	#ifdef __cplusplus
	67	extern "C" {
	68	#endif
	69
	70	/*
	71	* RIO: RED with IN/OUT bit
	72	* (extended to support more than 2 drop precedence values)
	73	*/
	74	#define RIO_NDROPPREC 3 /* number of drop precedence values */
	75
	76	#ifdef BSD_KERNEL_PRIVATE
	77	/* rio flags */
	78	#define RIOF_ECN4 0x01 /* use packet marking for IPv4 packets */
	79	#define RIOF_ECN6 0x02 /* use packet marking for IPv6 packets */
	80	#define RIOF_ECN (RIOF_ECN4 \| RIOF_ECN6)
	81	#define RIOF_CLEARDSCP 0x200 /* clear diffserv codepoint */
	82
	83	#define RIOF_USERFLAGS \
	84	(RIOF_ECN4 \| RIOF_ECN6 \| RIOF_CLEARDSCP)
	85
	86	typedef struct rio {
	87	/* per drop precedence structure */
	88	struct dropprec_state {
	89	/* red parameters */
	90	int inv_pmax; /* inverse of max drop probability */
	91	int th_min; /* red min threshold */
	92	int th_max; /* red max threshold */
	93
	94	/* variables for internal use */
	95	int th_min_s; /* th_min scaled by avgshift */
	96	int th_max_s; /* th_max scaled by avgshift */
	97	int probd; /* drop probability denominator */
	98
	99	int qlen; /* queue length */
	100	int avg; /* (scaled) queue length average */
	101	int count; /* packet count since the last */
	102	/* dropped/marked packet */
	103	int idle; /* queue was empty */
	104	int old; /* avg is above th_min */
	105	struct timeval last; /* timestamp when queue becomes idle */
	106	} rio_precstate[RIO_NDROPPREC];
	107
	108	int rio_wshift; /* log(red_weight) */
	109	int rio_weight; /* weight for EWMA */
	110	struct wtab rio_wtab; / weight table */
	111
	112	int rio_pkttime; /* average packet time in micro sec */
	113	/* used for idle calibration */
	114	int rio_flags; /* rio flags */
	115	struct ifnet rio_ifp; / back pointer to ifnet */
	116
	117	u_int8_t rio_codepoint; /* codepoint value to tag packets */
	118	u_int8_t rio_codepointmask; /* codepoint mask bits */
	119
	120	struct red_stats q_stats[RIO_NDROPPREC]; /* statistics */
	121	} rio_t;
	122
	123	extern void rio_init(void);
	124	extern rio_t rio_alloc(struct ifnet , int, struct redparams *, int, int);
	125	extern void rio_destroy(rio_t *);
	126	extern void rio_getstats(rio_t , struct red_stats );
	127	extern int rio_addq(rio_t , class_queue_t , struct mbuf , struct pf_mtag );
	128	extern struct mbuf rio_getq(rio_t , class_queue_t *);
	129	extern void rio_purgeq(struct rio , class_queue_t , u_int32_t,
	130	u_int32_t , u_int32_t );
	131	extern void rio_updateq(rio_t *, cqev_t);
	132	extern int rio_suspendq(rio_t , class_queue_t , boolean_t);
	133	#endif /* BSD_KERNEL_PRIVATE */
	134
	135	#ifdef __cplusplus
	136	}
	137	#endif
	138	#endif /* PRIVATE */
	139	#endif /* _NET_CLASSQ_CLASSQ_RIO_H_ */