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freebsd-skq/sys/net80211/ieee80211_ht.h
Adrian Chadd 51172f62a7 [net80211] Initial VHT node upgrade/downgrade support and initial IE parsing. 
This is the bulk of the magic to start enabling VHT channel negotiation.
It is absolutely, positively not yet even a complete VHT wave-1 implementation.

* parse IEs in scan, assoc req/resp, probe req/resp;
* break apart the channel upgrade from the HT IE parsing - do it after the
  VHT IEs are parsed;
* (dirty! sigh) add channel width decision making in ieee80211_ht.c htinfo_update_chw().
  This is the main bit where negotiated channel promotion through IEs occur.
* Shoehorn in VHT node init ,teardown, rate control, etc calls like the HT
  versions;
* Do VHT channel adjustment where appropriate

Tested:

* monitor mode, ath10k port
* STA mode, ath10k port - VHT20, VHT40, VHT80 modes

TODO:

* IBSS;
* hostap;
* (ignore mesh, wds for now);
* finish 11n state engine - channel width change, opmode notifications, SMPS, etc;
* VHT basic rate negotiation and acceptance criteria when scanning, associating, etc;
* VHT control/management frame handling (group managment and operating mode being
  the two big ones);
* Verify TX/RX VHT rate negotiation is actually working correctly.

Whilst here, add some comments about seqno allocation and locking.  To achieve
the full VHT rates I need to push seqno allocation into the drivers and
finally remove the IEEE80211_TX_LOCK() I added years ago to fix issues. :/
2017-01-13 07:02:04 +00:00

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/*-
* 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.
*
* $FreeBSD$
*/
#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 */
#define IEEE80211_AGGR_WAITRX 0x0040 /* Wait for first RX frame to define BAW */
uint8_t txa_tid;
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 was NACKed */
#define IEEE80211_AMPDU_NACKED(tap)\
(!! ((tap)->txa_flags & IEEE80211_AGGR_NAK))
/* 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_init_pps(struct ieee80211_tx_ampdu *tap)
{
/*
* Reset packet estimate.
*/
tap->txa_lastsample = ticks;
tap->txa_avgpps = 0;
}
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 *);
int ieee80211_ht_updateparams_final(struct ieee80211_node *,
const uint8_t *, const uint8_t *);
void ieee80211_ht_updatehtcap(struct ieee80211_node *, const uint8_t *);
void ieee80211_ht_updatehtcap_final(struct ieee80211_node *);
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_ch(uint8_t *, struct ieee80211vap *,
struct ieee80211_channel *);
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 *);
int ieee80211_ampdu_rx_start_ext(struct ieee80211_node *ni, int tid,
int seq, int baw);
void ieee80211_ampdu_rx_stop_ext(struct ieee80211_node *ni, int tid);
int ieee80211_ampdu_tx_request_ext(struct ieee80211_node *ni, int tid);
int ieee80211_ampdu_tx_request_active_ext(struct ieee80211_node *ni,
int tid, int status);
#endif /* _NET80211_IEEE80211_HT_H_ */
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