if_ath_tx_ht.c revision 218159
1/*- 2 * Copyright (c) 2011 Adrian Chadd, Xenion Pty Ltd. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer, 10 * without modification. 11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 12 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 13 * redistribution must be conditioned upon including a substantially 14 * similar Disclaimer requirement for further binary redistribution. 15 * 16 * NO WARRANTY 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 21 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 22 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 27 * THE POSSIBILITY OF SUCH DAMAGES. 28 */ 29 30#include <sys/cdefs.h> 31__FBSDID("$FreeBSD: head/sys/dev/ath/if_ath_tx_ht.c 218159 2011-02-01 08:03:01Z adrian $"); 32 33#include "opt_inet.h" 34#include "opt_ath.h" 35#include "opt_wlan.h" 36 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/sysctl.h> 40#include <sys/mbuf.h> 41#include <sys/malloc.h> 42#include <sys/lock.h> 43#include <sys/mutex.h> 44#include <sys/kernel.h> 45#include <sys/socket.h> 46#include <sys/sockio.h> 47#include <sys/errno.h> 48#include <sys/callout.h> 49#include <sys/bus.h> 50#include <sys/endian.h> 51#include <sys/kthread.h> 52#include <sys/taskqueue.h> 53#include <sys/priv.h> 54 55#include <machine/bus.h> 56 57#include <net/if.h> 58#include <net/if_dl.h> 59#include <net/if_media.h> 60#include <net/if_types.h> 61#include <net/if_arp.h> 62#include <net/ethernet.h> 63#include <net/if_llc.h> 64 65#include <net80211/ieee80211_var.h> 66#include <net80211/ieee80211_regdomain.h> 67#ifdef IEEE80211_SUPPORT_SUPERG 68#include <net80211/ieee80211_superg.h> 69#endif 70#ifdef IEEE80211_SUPPORT_TDMA 71#include <net80211/ieee80211_tdma.h> 72#endif 73 74#include <net/bpf.h> 75 76#ifdef INET 77#include <netinet/in.h> 78#include <netinet/if_ether.h> 79#endif 80 81#include <dev/ath/if_athvar.h> 82#include <dev/ath/ath_hal/ah_devid.h> /* XXX for softled */ 83#include <dev/ath/ath_hal/ah_diagcodes.h> 84 85#ifdef ATH_TX99_DIAG 86#include <dev/ath/ath_tx99/ath_tx99.h> 87#endif 88 89#include <dev/ath/if_ath_tx_ht.h> 90 91/* 92 * Setup a 11n rate series structure 93 * 94 * This should be called for both legacy and MCS rates. 95 */ 96static void 97ath_rateseries_setup(struct ath_softc *sc, struct ieee80211_node *ni, 98 HAL_11N_RATE_SERIES *series, unsigned int pktlen, uint8_t *rix, 99 uint8_t *try) 100{ 101 struct ieee80211com *ic = ni->ni_ic; 102 struct ath_hal *ah = sc->sc_ah; 103 HAL_BOOL shortPreamble = AH_FALSE; 104 const HAL_RATE_TABLE *rt = sc->sc_currates; 105 int i; 106 uint8_t txrate; 107 108 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 109 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) 110 shortPreamble = AH_TRUE; 111 112 memset(series, 0, sizeof(HAL_11N_RATE_SERIES) * 4); 113 for (i = 0; i < 4; i++) { 114 txrate = rt->info[rix[i]].rateCode; 115 series[i].Tries = try[i]; 116 series[i].ChSel = sc->sc_txchainmask; 117 if (ic->ic_protmode == IEEE80211_PROT_RTSCTS || 118 ic->ic_protmode == IEEE80211_PROT_CTSONLY) 119 series[i].RateFlags |= HAL_RATESERIES_RTS_CTS; 120 if (ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) 121 series[i].RateFlags |= HAL_RATESERIES_2040; 122 if (ni->ni_htcap & IEEE80211_HTCAP_SHORTGI20 || 123 ni->ni_htcap & IEEE80211_HTCAP_SHORTGI40) 124 series[i].RateFlags |= HAL_RATESERIES_HALFGI; 125 126 /* XXX should this check the short preamble value should be set for legacy rates? -adrian */ 127 series[i].Rate = txrate; 128 129 /* PktDuration doesn't include slot, ACK, RTS, etc timing - it's just the packet duration */ 130 if (txrate & IEEE80211_RATE_MCS) { 131 series[i].PktDuration = 132 ath_computedur_ht(pktlen 133 , txrate 134 , ic->ic_rxstream 135 , (ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) 136 , shortPreamble); 137 } else { 138 series[i].PktDuration = ath_hal_computetxtime(ah, 139 rt, pktlen, rix[i], shortPreamble); 140 } 141 } 142} 143 144#if 0 145static void 146ath_rateseries_print(HAL_11N_RATE_SERIES *series) 147{ 148 int i; 149 for (i = 0; i < 4; i++) { 150 printf("series %d: rate %x; tries %d; pktDuration %d; chSel %d; rateFlags %x\n", 151 i, 152 series[i].Rate, 153 series[i].Tries, 154 series[i].PktDuration, 155 series[i].ChSel, 156 series[i].RateFlags); 157 } 158} 159#endif 160 161/* 162 * Setup the 11n rate scenario and burst duration for the given TX descriptor 163 * list. 164 * 165 * This isn't useful for sending beacon frames, which has different needs 166 * wrt what's passed into the rate scenario function. 167 */ 168 169void 170ath_buf_set_rate(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_buf *bf, 171 int pktlen, int flags, uint8_t ctsrate, uint8_t *rix, uint8_t *try) 172{ 173 HAL_11N_RATE_SERIES series[4]; 174 struct ath_desc *ds = bf->bf_desc; 175 struct ath_desc *lastds = NULL; 176 struct ath_hal *ah = sc->sc_ah; 177 178 /* Setup rate scenario */ 179 memset(&series, 0, sizeof(series)); 180 181 ath_rateseries_setup(sc, ni, series, pktlen, rix, try); 182 183 /* Enforce AR5416 aggregate limit - can't do RTS w/ an agg frame > 8k */ 184 185 /* Enforce RTS and CTS are mutually exclusive */ 186 187 /* Get a pointer to the last tx descriptor in the list */ 188 lastds = &bf->bf_desc[bf->bf_nseg - 1]; 189 190 /* Set rate scenario */ 191 ath_hal_set11nratescenario(ah, ds, 192 ctsrate, /* rts/cts rate */ 193 0, /* rts/cts duration */ 194 series, /* 11n rate series */ 195 4, /* number of series */ 196 flags); 197 198 /* Setup the last descriptor in the chain */ 199 ath_hal_setuplasttxdesc(ah, lastds, ds); 200 201 /* Set burst duration */ 202 /* This should only be done if aggregate protection is enabled */ 203 //ath_hal_set11nburstduration(ah, ds, 8192); 204} 205