onoe.c revision 170375
1138569Ssam/*- 2170375Ssam * Copyright (c) 2002-2007 Sam Leffler, Errno Consulting 3138569Ssam * All rights reserved. 4138569Ssam * 5138569Ssam * Redistribution and use in source and binary forms, with or without 6138569Ssam * modification, are permitted provided that the following conditions 7138569Ssam * are met: 8138569Ssam * 1. Redistributions of source code must retain the above copyright 9138569Ssam * notice, this list of conditions and the following disclaimer, 10138569Ssam * without modification. 11138569Ssam * 2. Redistributions in binary form must reproduce at minimum a disclaimer 12138569Ssam * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 13138569Ssam * redistribution must be conditioned upon including a substantially 14138569Ssam * similar Disclaimer requirement for further binary redistribution. 15138569Ssam * 16138569Ssam * NO WARRANTY 17138569Ssam * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18138569Ssam * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19138569Ssam * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 20138569Ssam * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 21138569Ssam * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 22138569Ssam * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23138569Ssam * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24138569Ssam * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 25138569Ssam * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26138569Ssam * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 27138569Ssam * THE POSSIBILITY OF SUCH DAMAGES. 28138569Ssam */ 29138569Ssam 30138569Ssam#include <sys/cdefs.h> 31138569Ssam__FBSDID("$FreeBSD: head/sys/dev/ath/ath_rate/onoe/onoe.c 170375 2007-06-06 15:49:16Z sam $"); 32138569Ssam 33138569Ssam/* 34138569Ssam * Atsushi Onoe's rate control algorithm. 35138569Ssam */ 36138569Ssam#include "opt_inet.h" 37138569Ssam 38138569Ssam#include <sys/param.h> 39138569Ssam#include <sys/systm.h> 40138569Ssam#include <sys/sysctl.h> 41138569Ssam#include <sys/module.h> 42138569Ssam#include <sys/kernel.h> 43138569Ssam#include <sys/lock.h> 44138569Ssam#include <sys/mutex.h> 45138569Ssam#include <sys/errno.h> 46138569Ssam 47138569Ssam#include <machine/bus.h> 48138569Ssam#include <machine/resource.h> 49138569Ssam#include <sys/bus.h> 50138569Ssam 51138569Ssam#include <sys/socket.h> 52138569Ssam 53138569Ssam#include <net/if.h> 54138569Ssam#include <net/if_media.h> 55138569Ssam#include <net/if_arp.h> 56138569Ssam#include <net/ethernet.h> /* XXX for ether_sprintf */ 57138569Ssam 58138569Ssam#include <net80211/ieee80211_var.h> 59138569Ssam 60138569Ssam#include <net/bpf.h> 61138569Ssam 62138569Ssam#ifdef INET 63138569Ssam#include <netinet/in.h> 64138569Ssam#include <netinet/if_ether.h> 65138569Ssam#endif 66138569Ssam 67138569Ssam#include <dev/ath/if_athvar.h> 68138569Ssam#include <dev/ath/ath_rate/onoe/onoe.h> 69138569Ssam#include <contrib/dev/ath/ah_desc.h> 70138569Ssam 71138569Ssam#define ONOE_DEBUG 72138569Ssam#ifdef ONOE_DEBUG 73138569Ssamenum { 74138569Ssam ATH_DEBUG_RATE = 0x00000010, /* rate control */ 75138569Ssam}; 76138569Ssam#define DPRINTF(sc, _fmt, ...) do { \ 77138569Ssam if (sc->sc_debug & ATH_DEBUG_RATE) \ 78138569Ssam printf(_fmt, __VA_ARGS__); \ 79138569Ssam} while (0) 80138569Ssam#else 81138569Ssam#define DPRINTF(sc, _fmt, ...) 82138569Ssam#endif 83138569Ssam 84138569Ssam/* 85138569Ssam * Default parameters for the rate control algorithm. These are 86138569Ssam * all tunable with sysctls. The rate controller runs periodically 87138569Ssam * (each ath_rateinterval ms) analyzing transmit statistics for each 88138569Ssam * neighbor/station (when operating in station mode this is only the AP). 89138569Ssam * If transmits look to be working well over a sampling period then 90138569Ssam * it gives a "raise rate credit". If transmits look to not be working 91138569Ssam * well than it deducts a credit. If the credits cross a threshold then 92138569Ssam * the transmit rate is raised. Various error conditions force the 93138569Ssam * the transmit rate to be dropped. 94138569Ssam * 95138569Ssam * The decision to issue/deduct a credit is based on the errors and 96138569Ssam * retries accumulated over the sampling period. ath_rate_raise defines 97138569Ssam * the percent of retransmits for which a credit is issued/deducted. 98138569Ssam * ath_rate_raise_threshold defines the threshold on credits at which 99138569Ssam * the transmit rate is increased. 100138569Ssam * 101138569Ssam * XXX this algorithm is flawed. 102138569Ssam */ 103138569Ssamstatic int ath_rateinterval = 1000; /* rate ctl interval (ms) */ 104138569Ssamstatic int ath_rate_raise = 10; /* add credit threshold */ 105138569Ssamstatic int ath_rate_raise_threshold = 10; /* rate ctl raise threshold */ 106138569Ssam 107138569Ssamstatic void ath_ratectl(void *); 108138569Ssamstatic void ath_rate_update(struct ath_softc *, struct ieee80211_node *, 109138569Ssam int rate); 110138569Ssamstatic void ath_rate_ctl_start(struct ath_softc *, struct ieee80211_node *); 111138569Ssamstatic void ath_rate_ctl(void *, struct ieee80211_node *); 112138569Ssam 113138569Ssamvoid 114138569Ssamath_rate_node_init(struct ath_softc *sc, struct ath_node *an) 115138569Ssam{ 116138569Ssam /* NB: assumed to be zero'd by caller */ 117138569Ssam ath_rate_update(sc, &an->an_node, 0); 118138569Ssam} 119138569Ssam 120138569Ssamvoid 121138569Ssamath_rate_node_cleanup(struct ath_softc *sc, struct ath_node *an) 122138569Ssam{ 123138569Ssam} 124138569Ssam 125138569Ssamvoid 126138569Ssamath_rate_findrate(struct ath_softc *sc, struct ath_node *an, 127144546Ssam int shortPreamble, size_t frameLen, 128138569Ssam u_int8_t *rix, int *try0, u_int8_t *txrate) 129138569Ssam{ 130138569Ssam struct onoe_node *on = ATH_NODE_ONOE(an); 131138569Ssam 132138569Ssam *rix = on->on_tx_rix0; 133138569Ssam *try0 = on->on_tx_try0; 134138569Ssam if (shortPreamble) 135138569Ssam *txrate = on->on_tx_rate0sp; 136138569Ssam else 137138569Ssam *txrate = on->on_tx_rate0; 138138569Ssam} 139138569Ssam 140138569Ssamvoid 141138569Ssamath_rate_setupxtxdesc(struct ath_softc *sc, struct ath_node *an, 142144546Ssam struct ath_desc *ds, int shortPreamble, u_int8_t rix) 143138569Ssam{ 144138569Ssam struct onoe_node *on = ATH_NODE_ONOE(an); 145138569Ssam 146138569Ssam ath_hal_setupxtxdesc(sc->sc_ah, ds 147138569Ssam , on->on_tx_rate1sp, 2 /* series 1 */ 148138569Ssam , on->on_tx_rate2sp, 2 /* series 2 */ 149138569Ssam , on->on_tx_rate3sp, 2 /* series 3 */ 150138569Ssam ); 151138569Ssam} 152138569Ssam 153138569Ssamvoid 154144347Ssamath_rate_tx_complete(struct ath_softc *sc, struct ath_node *an, 155165185Ssam const struct ath_buf *bf) 156138569Ssam{ 157138569Ssam struct onoe_node *on = ATH_NODE_ONOE(an); 158165185Ssam const struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 159138569Ssam 160165185Ssam if (ts->ts_status == 0) 161138569Ssam on->on_tx_ok++; 162138569Ssam else 163138569Ssam on->on_tx_err++; 164165185Ssam on->on_tx_retr += ts->ts_shortretry 165165185Ssam + ts->ts_longretry; 166138569Ssam} 167138569Ssam 168138569Ssamvoid 169138569Ssamath_rate_newassoc(struct ath_softc *sc, struct ath_node *an, int isnew) 170138569Ssam{ 171138569Ssam if (isnew) 172138569Ssam ath_rate_ctl_start(sc, &an->an_node); 173138569Ssam} 174138569Ssam 175138569Ssamstatic void 176138569Ssamath_rate_update(struct ath_softc *sc, struct ieee80211_node *ni, int rate) 177138569Ssam{ 178138569Ssam struct ath_node *an = ATH_NODE(ni); 179138569Ssam struct onoe_node *on = ATH_NODE_ONOE(an); 180138569Ssam const HAL_RATE_TABLE *rt = sc->sc_currates; 181138569Ssam u_int8_t rix; 182138569Ssam 183138569Ssam KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 184138569Ssam 185138569Ssam DPRINTF(sc, "%s: set xmit rate for %s to %dM\n", 186138569Ssam __func__, ether_sprintf(ni->ni_macaddr), 187138569Ssam ni->ni_rates.rs_nrates > 0 ? 188138569Ssam (ni->ni_rates.rs_rates[rate] & IEEE80211_RATE_VAL) / 2 : 0); 189138569Ssam 190138569Ssam ni->ni_txrate = rate; 191138569Ssam /* 192138569Ssam * Before associating a node has no rate set setup 193138569Ssam * so we can't calculate any transmit codes to use. 194138569Ssam * This is ok since we should never be sending anything 195138569Ssam * but management frames and those always go at the 196138569Ssam * lowest hardware rate. 197138569Ssam */ 198138569Ssam if (ni->ni_rates.rs_nrates == 0) 199138569Ssam goto done; 200138569Ssam on->on_tx_rix0 = sc->sc_rixmap[ 201138569Ssam ni->ni_rates.rs_rates[rate] & IEEE80211_RATE_VAL]; 202138569Ssam on->on_tx_rate0 = rt->info[on->on_tx_rix0].rateCode; 203138569Ssam 204138569Ssam on->on_tx_rate0sp = on->on_tx_rate0 | 205138569Ssam rt->info[on->on_tx_rix0].shortPreamble; 206138569Ssam if (sc->sc_mrretry) { 207138569Ssam /* 208138569Ssam * Hardware supports multi-rate retry; setup two 209138569Ssam * step-down retry rates and make the lowest rate 210138569Ssam * be the ``last chance''. We use 4, 2, 2, 2 tries 211138569Ssam * respectively (4 is set here, the rest are fixed 212138569Ssam * in the xmit routine). 213138569Ssam */ 214138569Ssam on->on_tx_try0 = 1 + 3; /* 4 tries at rate 0 */ 215138569Ssam if (--rate >= 0) { 216138569Ssam rix = sc->sc_rixmap[ 217138569Ssam ni->ni_rates.rs_rates[rate]&IEEE80211_RATE_VAL]; 218138569Ssam on->on_tx_rate1 = rt->info[rix].rateCode; 219138569Ssam on->on_tx_rate1sp = on->on_tx_rate1 | 220138569Ssam rt->info[rix].shortPreamble; 221138569Ssam } else { 222138569Ssam on->on_tx_rate1 = on->on_tx_rate1sp = 0; 223138569Ssam } 224138569Ssam if (--rate >= 0) { 225138569Ssam rix = sc->sc_rixmap[ 226138569Ssam ni->ni_rates.rs_rates[rate]&IEEE80211_RATE_VAL]; 227138569Ssam on->on_tx_rate2 = rt->info[rix].rateCode; 228138569Ssam on->on_tx_rate2sp = on->on_tx_rate2 | 229138569Ssam rt->info[rix].shortPreamble; 230138569Ssam } else { 231138569Ssam on->on_tx_rate2 = on->on_tx_rate2sp = 0; 232138569Ssam } 233138569Ssam if (rate > 0) { 234138569Ssam /* NB: only do this if we didn't already do it above */ 235138569Ssam on->on_tx_rate3 = rt->info[0].rateCode; 236138569Ssam on->on_tx_rate3sp = 237155477Ssam on->on_tx_rate3 | rt->info[0].shortPreamble; 238138569Ssam } else { 239138569Ssam on->on_tx_rate3 = on->on_tx_rate3sp = 0; 240138569Ssam } 241138569Ssam } else { 242138569Ssam on->on_tx_try0 = ATH_TXMAXTRY; /* max tries at rate 0 */ 243138569Ssam on->on_tx_rate1 = on->on_tx_rate1sp = 0; 244138569Ssam on->on_tx_rate2 = on->on_tx_rate2sp = 0; 245138569Ssam on->on_tx_rate3 = on->on_tx_rate3sp = 0; 246138569Ssam } 247138569Ssamdone: 248138569Ssam on->on_tx_ok = on->on_tx_err = on->on_tx_retr = on->on_tx_upper = 0; 249138569Ssam} 250138569Ssam 251138569Ssam/* 252138569Ssam * Set the starting transmit rate for a node. 253138569Ssam */ 254138569Ssamstatic void 255138569Ssamath_rate_ctl_start(struct ath_softc *sc, struct ieee80211_node *ni) 256138569Ssam{ 257138569Ssam#define RATE(_ix) (ni->ni_rates.rs_rates[(_ix)] & IEEE80211_RATE_VAL) 258138569Ssam struct ieee80211com *ic = &sc->sc_ic; 259138569Ssam int srate; 260138569Ssam 261138569Ssam KASSERT(ni->ni_rates.rs_nrates > 0, ("no rates")); 262148290Ssam if (ic->ic_fixed_rate == IEEE80211_FIXED_RATE_NONE) { 263138569Ssam /* 264138569Ssam * No fixed rate is requested. For 11b start with 265138569Ssam * the highest negotiated rate; otherwise, for 11g 266138569Ssam * and 11a, we start "in the middle" at 24Mb or 36Mb. 267138569Ssam */ 268138569Ssam srate = ni->ni_rates.rs_nrates - 1; 269138569Ssam if (sc->sc_curmode != IEEE80211_MODE_11B) { 270138569Ssam /* 271138569Ssam * Scan the negotiated rate set to find the 272138569Ssam * closest rate. 273138569Ssam */ 274138569Ssam /* NB: the rate set is assumed sorted */ 275138569Ssam for (; srate >= 0 && RATE(srate) > 72; srate--) 276138569Ssam ; 277138569Ssam KASSERT(srate >= 0, ("bogus rate set")); 278138569Ssam } 279138569Ssam } else { 280138569Ssam /* 281138569Ssam * A fixed rate is to be used; ic_fixed_rate is an 282138569Ssam * index into the supported rate set. Convert this 283138569Ssam * to the index into the negotiated rate set for 284138569Ssam * the node. We know the rate is there because the 285138569Ssam * rate set is checked when the station associates. 286138569Ssam */ 287138569Ssam const struct ieee80211_rateset *rs = 288138569Ssam &ic->ic_sup_rates[ic->ic_curmode]; 289138569Ssam int r = rs->rs_rates[ic->ic_fixed_rate] & IEEE80211_RATE_VAL; 290138569Ssam /* NB: the rate set is assumed sorted */ 291138569Ssam srate = ni->ni_rates.rs_nrates - 1; 292138569Ssam for (; srate >= 0 && RATE(srate) != r; srate--) 293138569Ssam ; 294138569Ssam KASSERT(srate >= 0, 295138569Ssam ("fixed rate %d not in rate set", ic->ic_fixed_rate)); 296138569Ssam } 297138569Ssam ath_rate_update(sc, ni, srate); 298138569Ssam#undef RATE 299138569Ssam} 300138569Ssam 301138569Ssamstatic void 302138569Ssamath_rate_cb(void *arg, struct ieee80211_node *ni) 303138569Ssam{ 304144306Ssam struct ath_softc *sc = arg; 305144306Ssam 306144306Ssam ath_rate_update(sc, ni, 0); 307138569Ssam} 308138569Ssam 309138569Ssam/* 310138569Ssam * Reset the rate control state for each 802.11 state transition. 311138569Ssam */ 312138569Ssamvoid 313138569Ssamath_rate_newstate(struct ath_softc *sc, enum ieee80211_state state) 314138569Ssam{ 315138569Ssam struct onoe_softc *osc = (struct onoe_softc *) sc->sc_rc; 316138569Ssam struct ieee80211com *ic = &sc->sc_ic; 317138569Ssam struct ieee80211_node *ni; 318138569Ssam 319138569Ssam if (state == IEEE80211_S_INIT) { 320138569Ssam callout_stop(&osc->timer); 321138569Ssam return; 322138569Ssam } 323138569Ssam if (ic->ic_opmode == IEEE80211_M_STA) { 324138569Ssam /* 325138569Ssam * Reset local xmit state; this is really only 326138569Ssam * meaningful when operating in station mode. 327138569Ssam */ 328138569Ssam ni = ic->ic_bss; 329138569Ssam if (state == IEEE80211_S_RUN) { 330138569Ssam ath_rate_ctl_start(sc, ni); 331138569Ssam } else { 332138569Ssam ath_rate_update(sc, ni, 0); 333138569Ssam } 334138569Ssam } else { 335138569Ssam /* 336138569Ssam * When operating as a station the node table holds 337138569Ssam * the AP's that were discovered during scanning. 338138569Ssam * For any other operating mode we want to reset the 339138569Ssam * tx rate state of each node. 340138569Ssam */ 341144306Ssam ieee80211_iterate_nodes(&ic->ic_sta, ath_rate_cb, sc); 342138569Ssam ath_rate_update(sc, ic->ic_bss, 0); 343138569Ssam } 344148290Ssam if (ic->ic_fixed_rate == IEEE80211_FIXED_RATE_NONE && 345148290Ssam state == IEEE80211_S_RUN) { 346138569Ssam int interval; 347138569Ssam /* 348138569Ssam * Start the background rate control thread if we 349138569Ssam * are not configured to use a fixed xmit rate. 350138569Ssam */ 351138569Ssam interval = ath_rateinterval; 352138569Ssam if (ic->ic_opmode == IEEE80211_M_STA) 353138569Ssam interval /= 2; 354138569Ssam callout_reset(&osc->timer, (interval * hz) / 1000, 355147256Sbrooks ath_ratectl, sc->sc_ifp); 356138569Ssam } 357138569Ssam} 358138569Ssam 359138569Ssam/* 360138569Ssam * Examine and potentially adjust the transmit rate. 361138569Ssam */ 362138569Ssamstatic void 363138569Ssamath_rate_ctl(void *arg, struct ieee80211_node *ni) 364138569Ssam{ 365138569Ssam struct ath_softc *sc = arg; 366138569Ssam struct onoe_node *on = ATH_NODE_ONOE(ATH_NODE(ni)); 367138569Ssam struct ieee80211_rateset *rs = &ni->ni_rates; 368138569Ssam int dir = 0, nrate, enough; 369138569Ssam 370138569Ssam /* 371138569Ssam * Rate control 372138569Ssam * XXX: very primitive version. 373138569Ssam */ 374138569Ssam enough = (on->on_tx_ok + on->on_tx_err >= 10); 375138569Ssam 376138569Ssam /* no packet reached -> down */ 377138569Ssam if (on->on_tx_err > 0 && on->on_tx_ok == 0) 378138569Ssam dir = -1; 379138569Ssam 380138569Ssam /* all packets needs retry in average -> down */ 381138569Ssam if (enough && on->on_tx_ok < on->on_tx_retr) 382138569Ssam dir = -1; 383138569Ssam 384138569Ssam /* no error and less than rate_raise% of packets need retry -> up */ 385138569Ssam if (enough && on->on_tx_err == 0 && 386138569Ssam on->on_tx_retr < (on->on_tx_ok * ath_rate_raise) / 100) 387138569Ssam dir = 1; 388138569Ssam 389138569Ssam DPRINTF(sc, "%s: ok %d err %d retr %d upper %d dir %d\n", 390138569Ssam ether_sprintf(ni->ni_macaddr), 391138569Ssam on->on_tx_ok, on->on_tx_err, on->on_tx_retr, 392138569Ssam on->on_tx_upper, dir); 393138569Ssam 394138569Ssam nrate = ni->ni_txrate; 395138569Ssam switch (dir) { 396138569Ssam case 0: 397138569Ssam if (enough && on->on_tx_upper > 0) 398138569Ssam on->on_tx_upper--; 399138569Ssam break; 400138569Ssam case -1: 401138569Ssam if (nrate > 0) { 402138569Ssam nrate--; 403138569Ssam sc->sc_stats.ast_rate_drop++; 404138569Ssam } 405138569Ssam on->on_tx_upper = 0; 406138569Ssam break; 407138569Ssam case 1: 408138569Ssam /* raise rate if we hit rate_raise_threshold */ 409138569Ssam if (++on->on_tx_upper < ath_rate_raise_threshold) 410138569Ssam break; 411138569Ssam on->on_tx_upper = 0; 412138569Ssam if (nrate + 1 < rs->rs_nrates) { 413138569Ssam nrate++; 414138569Ssam sc->sc_stats.ast_rate_raise++; 415138569Ssam } 416138569Ssam break; 417138569Ssam } 418138569Ssam 419138569Ssam if (nrate != ni->ni_txrate) { 420138569Ssam DPRINTF(sc, "%s: %dM -> %dM (%d ok, %d err, %d retr)\n", 421138569Ssam __func__, 422138569Ssam (rs->rs_rates[ni->ni_txrate] & IEEE80211_RATE_VAL) / 2, 423138569Ssam (rs->rs_rates[nrate] & IEEE80211_RATE_VAL) / 2, 424138569Ssam on->on_tx_ok, on->on_tx_err, on->on_tx_retr); 425138569Ssam ath_rate_update(sc, ni, nrate); 426138569Ssam } else if (enough) 427138569Ssam on->on_tx_ok = on->on_tx_err = on->on_tx_retr = 0; 428138569Ssam} 429138569Ssam 430138569Ssamstatic void 431138569Ssamath_ratectl(void *arg) 432138569Ssam{ 433138569Ssam struct ifnet *ifp = arg; 434138569Ssam struct ath_softc *sc = ifp->if_softc; 435138569Ssam struct onoe_softc *osc = (struct onoe_softc *) sc->sc_rc; 436138569Ssam struct ieee80211com *ic = &sc->sc_ic; 437138569Ssam int interval; 438138569Ssam 439148887Srwatson if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 440138569Ssam sc->sc_stats.ast_rate_calls++; 441138569Ssam 442138569Ssam if (ic->ic_opmode == IEEE80211_M_STA) 443138569Ssam ath_rate_ctl(sc, ic->ic_bss); /* NB: no reference */ 444140753Ssam else 445140753Ssam ieee80211_iterate_nodes(&ic->ic_sta, ath_rate_ctl, sc); 446138569Ssam } 447138569Ssam interval = ath_rateinterval; 448138569Ssam if (ic->ic_opmode == IEEE80211_M_STA) 449138569Ssam interval /= 2; 450138569Ssam callout_reset(&osc->timer, (interval * hz) / 1000, 451147256Sbrooks ath_ratectl, sc->sc_ifp); 452138569Ssam} 453138569Ssam 454138569Ssamstatic void 455138569Ssamath_rate_sysctlattach(struct ath_softc *sc) 456138569Ssam{ 457138569Ssam struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->sc_dev); 458138569Ssam struct sysctl_oid *tree = device_get_sysctl_tree(sc->sc_dev); 459138569Ssam 460138569Ssam SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 461138569Ssam "rate_interval", CTLFLAG_RW, &ath_rateinterval, 0, 462138569Ssam "rate control: operation interval (ms)"); 463138569Ssam /* XXX bounds check values */ 464138569Ssam SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 465138569Ssam "rate_raise", CTLFLAG_RW, &ath_rate_raise, 0, 466138569Ssam "rate control: retry threshold to credit rate raise (%%)"); 467138569Ssam SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 468138569Ssam "rate_raise_threshold", CTLFLAG_RW, &ath_rate_raise_threshold,0, 469138569Ssam "rate control: # good periods before raising rate"); 470138569Ssam} 471138569Ssam 472138569Ssamstruct ath_ratectrl * 473138569Ssamath_rate_attach(struct ath_softc *sc) 474138569Ssam{ 475138569Ssam struct onoe_softc *osc; 476138569Ssam 477138569Ssam osc = malloc(sizeof(struct onoe_softc), M_DEVBUF, M_NOWAIT|M_ZERO); 478138569Ssam if (osc == NULL) 479138569Ssam return NULL; 480138569Ssam osc->arc.arc_space = sizeof(struct onoe_node); 481138569Ssam callout_init(&osc->timer, debug_mpsafenet ? CALLOUT_MPSAFE : 0); 482138569Ssam ath_rate_sysctlattach(sc); 483138569Ssam 484138569Ssam return &osc->arc; 485138569Ssam} 486138569Ssam 487138569Ssamvoid 488138569Ssamath_rate_detach(struct ath_ratectrl *arc) 489138569Ssam{ 490138569Ssam struct onoe_softc *osc = (struct onoe_softc *) arc; 491138569Ssam 492138569Ssam callout_drain(&osc->timer); 493138569Ssam free(osc, M_DEVBUF); 494138569Ssam} 495138569Ssam 496138569Ssam/* 497138569Ssam * Module glue. 498138569Ssam */ 499138569Ssamstatic int 500138569Ssamonoe_modevent(module_t mod, int type, void *unused) 501138569Ssam{ 502138569Ssam switch (type) { 503138569Ssam case MOD_LOAD: 504138569Ssam if (bootverbose) 505138569Ssam printf("ath_rate: <Atsushi Onoe's rate control algorithm>\n"); 506138569Ssam return 0; 507138569Ssam case MOD_UNLOAD: 508138569Ssam return 0; 509138569Ssam } 510138569Ssam return EINVAL; 511138569Ssam} 512138569Ssam 513138569Ssamstatic moduledata_t onoe_mod = { 514138569Ssam "ath_rate", 515138569Ssam onoe_modevent, 516138569Ssam 0 517138569Ssam}; 518138569SsamDECLARE_MODULE(ath_rate, onoe_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 519138569SsamMODULE_VERSION(ath_rate, 1); 520138569SsamMODULE_DEPEND(ath_rate, wlan, 1, 1, 1); 521