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("$FreeBSD$"); 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 */ 96 static void 97 ath_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_txstream 135 , (ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) 136 , series[i].RateFlags & HAL_RATESERIES_HALFGI); 137 } else { 138 series[i].PktDuration = ath_hal_computetxtime(ah, 139 rt, pktlen, rix[i], shortPreamble); 140 } 141 } 142 } 143 144 #if 0 145 static void 146 ath_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 */ 168 169 void 170 ath_buf_set_rate(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_buf *bf, 171 int pktlen, int flags, uint8_t ctsrate, int is_pspoll, 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 !is_pspoll, /* whether to override the duration or not */ 193 /* don't allow hardware to override the duration on ps-poll packets */ 194 ctsrate, /* rts/cts rate */ 195 series, /* 11n rate series */ 196 4, /* number of series */ 197 flags); 198 199 /* Setup the last descriptor in the chain */ 200 ath_hal_setuplasttxdesc(ah, lastds, ds); 201 202 /* Set burst duration */ 203 /* This should only be done if aggregate protection is enabled */ 204 //ath_hal_set11nburstduration(ah, ds, 8192); 205 } 206