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FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/net80211/ieee80211_ht.h |
/*- * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting * All rights reserved. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. * * $FreeBSD: release/9.1.0/sys/net80211/ieee80211_ht.h 219456 2011-03-10 18:17:24Z bschmidt $ */ #ifndef _NET80211_IEEE80211_HT_H_ #define _NET80211_IEEE80211_HT_H_ /* * 802.11n protocol implementation definitions. */ #define IEEE80211_AGGR_BAWMAX 64 /* max block ack window size */ /* threshold for aging overlapping non-HT bss */ #define IEEE80211_NONHT_PRESENT_AGE msecs_to_ticks(60*1000) struct ieee80211_tx_ampdu { struct ieee80211_node *txa_ni; /* back pointer */ u_short txa_flags; #define IEEE80211_AGGR_IMMEDIATE 0x0001 /* BA policy */ #define IEEE80211_AGGR_XCHGPEND 0x0002 /* ADDBA response pending */ #define IEEE80211_AGGR_RUNNING 0x0004 /* ADDBA response received */ #define IEEE80211_AGGR_SETUP 0x0008 /* deferred state setup */ #define IEEE80211_AGGR_NAK 0x0010 /* peer NAK'd ADDBA request */ #define IEEE80211_AGGR_BARPEND 0x0020 /* BAR response pending */ uint8_t txa_ac; uint8_t txa_token; /* dialog token */ int txa_lastsample; /* ticks @ last traffic sample */ int txa_pkts; /* packets over last sample interval */ int txa_avgpps; /* filtered traffic over window */ int txa_qbytes; /* data queued (bytes) */ short txa_qframes; /* data queued (frames) */ ieee80211_seq txa_start; /* BA window left edge */ ieee80211_seq txa_seqpending; /* new txa_start pending BAR response */ uint16_t txa_wnd; /* BA window size */ uint8_t txa_attempts; /* # ADDBA/BAR requests w/o a response*/ int txa_nextrequest;/* soonest to make next request */ struct callout txa_timer; void *txa_private; /* driver-private storage */ uint64_t txa_pad[4]; }; /* return non-zero if AMPDU tx for the TID is running */ #define IEEE80211_AMPDU_RUNNING(tap) \ (((tap)->txa_flags & IEEE80211_AGGR_RUNNING) != 0) /* return non-zero if AMPDU tx for the TID is running or started */ #define IEEE80211_AMPDU_REQUESTED(tap) \ (((tap)->txa_flags & \ (IEEE80211_AGGR_RUNNING|IEEE80211_AGGR_XCHGPEND|IEEE80211_AGGR_NAK)) != 0) #define IEEE80211_AGGR_BITS \ "\20\1IMMEDIATE\2XCHGPEND\3RUNNING\4SETUP\5NAK" /* * Traffic estimator support. We estimate packets/sec for * each AC that is setup for AMPDU or will potentially be * setup for AMPDU. The traffic rate can be used to decide * when AMPDU should be setup (according to a threshold) * and is available for drivers to do things like cache * eviction when only a limited number of BA streams are * available and more streams are requested than available. */ static __inline void ieee80211_txampdu_update_pps(struct ieee80211_tx_ampdu *tap) { /* NB: scale factor of 2 was picked heuristically */ tap->txa_avgpps = ((tap->txa_avgpps << 2) - tap->txa_avgpps + tap->txa_pkts) >> 2; } /* * Count a packet towards the pps estimate. */ static __inline void ieee80211_txampdu_count_packet(struct ieee80211_tx_ampdu *tap) { /* XXX bound loop/do more crude estimate? */ while (ticks - tap->txa_lastsample >= hz) { ieee80211_txampdu_update_pps(tap); /* reset to start new sample interval */ tap->txa_pkts = 0; if (tap->txa_avgpps == 0) { tap->txa_lastsample = ticks; break; } tap->txa_lastsample += hz; } tap->txa_pkts++; } /* * Get the current pps estimate. If the average is out of * date due to lack of traffic then we decay the estimate * to account for the idle time. */ static __inline int ieee80211_txampdu_getpps(struct ieee80211_tx_ampdu *tap) { /* XXX bound loop/do more crude estimate? */ while (ticks - tap->txa_lastsample >= hz) { ieee80211_txampdu_update_pps(tap); tap->txa_pkts = 0; if (tap->txa_avgpps == 0) { tap->txa_lastsample = ticks; break; } tap->txa_lastsample += hz; } return tap->txa_avgpps; } struct ieee80211_rx_ampdu { int rxa_flags; int rxa_qbytes; /* data queued (bytes) */ short rxa_qframes; /* data queued (frames) */ ieee80211_seq rxa_seqstart; ieee80211_seq rxa_start; /* start of current BA window */ uint16_t rxa_wnd; /* BA window size */ int rxa_age; /* age of oldest frame in window */ int rxa_nframes; /* frames since ADDBA */ struct mbuf *rxa_m[IEEE80211_AGGR_BAWMAX]; void *rxa_private; uint64_t rxa_pad[3]; }; void ieee80211_ht_attach(struct ieee80211com *); void ieee80211_ht_detach(struct ieee80211com *); void ieee80211_ht_vattach(struct ieee80211vap *); void ieee80211_ht_vdetach(struct ieee80211vap *); void ieee80211_ht_announce(struct ieee80211com *); struct ieee80211_mcs_rates { uint16_t ht20_rate_800ns; uint16_t ht20_rate_400ns; uint16_t ht40_rate_800ns; uint16_t ht40_rate_400ns; }; extern const struct ieee80211_mcs_rates ieee80211_htrates[]; const struct ieee80211_htrateset *ieee80211_get_suphtrates( struct ieee80211com *, const struct ieee80211_channel *); struct ieee80211_node; int ieee80211_setup_htrates(struct ieee80211_node *, const uint8_t *htcap, int flags); void ieee80211_setup_basic_htrates(struct ieee80211_node *, const uint8_t *htinfo); struct mbuf *ieee80211_decap_amsdu(struct ieee80211_node *, struct mbuf *); int ieee80211_ampdu_reorder(struct ieee80211_node *, struct mbuf *); void ieee80211_recv_bar(struct ieee80211_node *, struct mbuf *); void ieee80211_ht_node_init(struct ieee80211_node *); void ieee80211_ht_node_cleanup(struct ieee80211_node *); void ieee80211_ht_node_age(struct ieee80211_node *); struct ieee80211_channel *ieee80211_ht_adjust_channel(struct ieee80211com *, struct ieee80211_channel *, int); void ieee80211_ht_wds_init(struct ieee80211_node *); void ieee80211_ht_node_join(struct ieee80211_node *); void ieee80211_ht_node_leave(struct ieee80211_node *); void ieee80211_htprot_update(struct ieee80211com *, int protmode); void ieee80211_ht_timeout(struct ieee80211com *); void ieee80211_parse_htcap(struct ieee80211_node *, const uint8_t *); void ieee80211_parse_htinfo(struct ieee80211_node *, const uint8_t *); void ieee80211_ht_updateparams(struct ieee80211_node *, const uint8_t *, const uint8_t *); void ieee80211_ht_updatehtcap(struct ieee80211_node *, const uint8_t *); int ieee80211_ampdu_request(struct ieee80211_node *, struct ieee80211_tx_ampdu *); void ieee80211_ampdu_stop(struct ieee80211_node *, struct ieee80211_tx_ampdu *, int); int ieee80211_send_bar(struct ieee80211_node *, struct ieee80211_tx_ampdu *, ieee80211_seq); uint8_t *ieee80211_add_htcap(uint8_t *, struct ieee80211_node *); uint8_t *ieee80211_add_htcap_vendor(uint8_t *, struct ieee80211_node *); uint8_t *ieee80211_add_htinfo(uint8_t *, struct ieee80211_node *); uint8_t *ieee80211_add_htinfo_vendor(uint8_t *, struct ieee80211_node *); struct ieee80211_beacon_offsets; void ieee80211_ht_update_beacon(struct ieee80211vap *, struct ieee80211_beacon_offsets *); #endif /* _NET80211_IEEE80211_HT_H_ */