if_ath_tx_ht.c revision 219588
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 219588 2011-03-13 08:23:59Z 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, int flags) 100{ 101#define HT_RC_2_STREAMS(_rc) ((((_rc) & 0x78) >> 3) + 1) 102 struct ieee80211com *ic = ni->ni_ic; 103 struct ath_hal *ah = sc->sc_ah; 104 HAL_BOOL shortPreamble = AH_FALSE; 105 const HAL_RATE_TABLE *rt = sc->sc_currates; 106 int i; 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 /* Only set flags for actual TX attempts */ 115 if (try[i] == 0) 116 continue; 117 118 series[i].Tries = try[i]; 119 120 /* 121 * XXX this isn't strictly correct - sc_txchainmask 122 * XXX isn't the currently active chainmask; 123 * XXX it's the interface chainmask at startup. 124 * XXX It's overridden in the HAL rate scenario function 125 * XXX for now. 126 */ 127 series[i].ChSel = sc->sc_txchainmask; 128 129 if (flags & (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA)) 130 series[i].RateFlags |= HAL_RATESERIES_RTS_CTS; 131 132#if 0 133 if (ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) 134 series[i].RateFlags |= HAL_RATESERIES_2040; 135 136 /* 137 * The hardware only supports short-gi in 40mhz mode - 138 * if later hardware supports it in 20mhz mode, be sure 139 * to add the relevant check here. 140 */ 141 if (ni->ni_htcap & IEEE80211_HTCAP_SHORTGI40) 142 series[i].RateFlags |= HAL_RATESERIES_HALFGI; 143#endif 144 145 series[i].Rate = rt->info[rix[i]].rateCode; 146 /* the short preamble field is only applicable for non-MCS rates */ 147 if (shortPreamble && ! (series[i].Rate & IEEE80211_RATE_MCS)) 148 series[i].Rate |= rt->info[rix[i]].shortPreamble; 149 150 /* PktDuration doesn't include slot, ACK, RTS, etc timing - it's just the packet duration */ 151 if (series[i].Rate & IEEE80211_RATE_MCS) { 152 series[i].PktDuration = 153 ath_computedur_ht(pktlen 154 , series[i].Rate 155 , HT_RC_2_STREAMS(series[i].Rate) 156 , series[i].RateFlags & HAL_RATESERIES_2040 157 , series[i].RateFlags & HAL_RATESERIES_HALFGI); 158 } else { 159 series[i].PktDuration = ath_hal_computetxtime(ah, 160 rt, pktlen, rix[i], shortPreamble); 161 } 162 } 163#undef HT_RC_2_STREAMS 164} 165 166#if 0 167static void 168ath_rateseries_print(HAL_11N_RATE_SERIES *series) 169{ 170 int i; 171 for (i = 0; i < 4; i++) { 172 printf("series %d: rate %x; tries %d; pktDuration %d; chSel %d; rateFlags %x\n", 173 i, 174 series[i].Rate, 175 series[i].Tries, 176 series[i].PktDuration, 177 series[i].ChSel, 178 series[i].RateFlags); 179 } 180} 181#endif 182 183/* 184 * Setup the 11n rate scenario and burst duration for the given TX descriptor 185 * list. 186 * 187 * This isn't useful for sending beacon frames, which has different needs 188 * wrt what's passed into the rate scenario function. 189 */ 190 191void 192ath_buf_set_rate(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_buf *bf, 193 int pktlen, int flags, uint8_t ctsrate, int is_pspoll, uint8_t *rix, uint8_t *try) 194{ 195 HAL_11N_RATE_SERIES series[4]; 196 struct ath_desc *ds = bf->bf_desc; 197 struct ath_desc *lastds = NULL; 198 struct ath_hal *ah = sc->sc_ah; 199 200 /* Setup rate scenario */ 201 memset(&series, 0, sizeof(series)); 202 203 ath_rateseries_setup(sc, ni, series, pktlen, rix, try, flags); 204 205 /* Enforce AR5416 aggregate limit - can't do RTS w/ an agg frame > 8k */ 206 207 /* Enforce RTS and CTS are mutually exclusive */ 208 209 /* Get a pointer to the last tx descriptor in the list */ 210 lastds = &bf->bf_desc[bf->bf_nseg - 1]; 211 212#if 0 213 printf("pktlen: %d; flags 0x%x\n", pktlen, flags); 214 ath_rateseries_print(series); 215#endif 216 217 /* Set rate scenario */ 218 ath_hal_set11nratescenario(ah, ds, 219 !is_pspoll, /* whether to override the duration or not */ 220 /* don't allow hardware to override the duration on ps-poll packets */ 221 ctsrate, /* rts/cts rate */ 222 series, /* 11n rate series */ 223 4, /* number of series */ 224 flags); 225 226 /* Setup the last descriptor in the chain */ 227 ath_hal_setuplasttxdesc(ah, lastds, ds); 228 229 /* Set burst duration */ 230 /* This should only be done if aggregate protection is enabled */ 231 //ath_hal_set11nburstduration(ah, ds, 8192); 232} 233