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/*
* Copyright (c) 2008 The DragonFly Project. All rights reserved.
*
* This code is derived from software contributed to The DragonFly Project
* by Matthew Dillon <dillon@backplane.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name of The DragonFly Project nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific, prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $DragonFly: src/sys/net/altq/altq_fairq.h,v 1.1 2008/04/06 18:58:15 dillon Exp $
* $FreeBSD$
*/
#ifndef _ALTQ_ALTQ_FAIRQ_H_
#define _ALTQ_ALTQ_FAIRQ_H_
#include <net/altq/altq.h>
#include <net/altq/altq_classq.h>
#include <net/altq/altq_red.h>
#include <net/altq/altq_rio.h>
#include <net/altq/altq_rmclass.h>
#define FAIRQ_MAX_BUCKETS 2048 /* maximum number of sorting buckets */
#define FAIRQ_MAXPRI RM_MAXPRIO
#define FAIRQ_BITMAP_WIDTH (sizeof(fairq_bitmap_t)*8)
#define FAIRQ_BITMAP_MASK (FAIRQ_BITMAP_WIDTH - 1)
/* fairq class flags */
#define FARF_RED 0x0001 /* use RED */
#define FARF_ECN 0x0002 /* use RED/ECN */
#define FARF_RIO 0x0004 /* use RIO */
#define FARF_CLEARDSCP 0x0010 /* clear diffserv codepoint */
#define FARF_DEFAULTCLASS 0x1000 /* default class */
#define FARF_HAS_PACKETS 0x2000 /* might have queued packets */
#define FARF_USERFLAGS (FARF_RED|FARF_ECN|FARF_RIO|FARF_CLEARDSCP| \
FARF_DEFAULTCLASS)
/* special class handles */
#define FAIRQ_NULLCLASS_HANDLE 0
typedef u_int fairq_bitmap_t;
struct fairq_classstats {
uint32_t class_handle;
u_int qlength;
u_int qlimit;
struct pktcntr xmit_cnt; /* transmitted packet counter */
struct pktcntr drop_cnt; /* dropped packet counter */
/* red and rio related info */
int qtype;
struct redstats red[3]; /* rio has 3 red stats */
};
#ifdef _KERNEL
typedef struct fairq_bucket {
struct fairq_bucket *next; /* circular list */
struct fairq_bucket *prev; /* circular list */
class_queue_t queue; /* the actual queue */
uint64_t bw_bytes; /* statistics used to calculate bw */
uint64_t bw_delta; /* statistics used to calculate bw */
uint64_t last_time;
int in_use;
} fairq_bucket_t;
struct fairq_class {
uint32_t cl_handle; /* class handle */
u_int cl_nbuckets; /* (power of 2) */
u_int cl_nbucket_mask; /* bucket mask */
fairq_bucket_t *cl_buckets;
fairq_bucket_t *cl_head; /* head of circular bucket list */
fairq_bucket_t *cl_polled;
struct red *cl_red; /* RED state */
u_int cl_hogs_m1;
u_int cl_lssc_m1;
u_int cl_bandwidth;
uint64_t cl_bw_bytes;
uint64_t cl_bw_delta;
uint64_t cl_last_time;
int cl_qtype; /* rollup */
int cl_qlimit;
int cl_pri; /* priority */
int cl_flags; /* class flags */
struct fairq_if *cl_pif; /* back pointer to pif */
struct altq_pktattr *cl_pktattr; /* saved header used by ECN */
/* round robin index */
/* statistics */
struct pktcntr cl_xmitcnt; /* transmitted packet counter */
struct pktcntr cl_dropcnt; /* dropped packet counter */
};
/*
* fairq interface state
*/
struct fairq_if {
struct fairq_if *pif_next; /* interface state list */
struct ifaltq *pif_ifq; /* backpointer to ifaltq */
u_int pif_bandwidth; /* link bandwidth in bps */
int pif_maxpri; /* max priority in use */
struct fairq_class *pif_poll_cache;/* cached poll */
struct fairq_class *pif_default; /* default class */
struct fairq_class *pif_classes[FAIRQ_MAXPRI]; /* classes */
};
#endif /* _KERNEL */
#endif /* _ALTQ_ALTQ_FAIRQ_H_ */
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