diff options
Diffstat (limited to 'sys/dev/ath/if_ath_tx_ht.c')
| -rw-r--r-- | sys/dev/ath/if_ath_tx_ht.c | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/sys/dev/ath/if_ath_tx_ht.c b/sys/dev/ath/if_ath_tx_ht.c new file mode 100644 index 0000000..5b7d19e --- /dev/null +++ b/sys/dev/ath/if_ath_tx_ht.c @@ -0,0 +1,204 @@ +/*- + * Copyright (c) 2011 Adrian Chadd, Xenion Pty Ltd. + * 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, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any + * redistribution must be conditioned upon including a substantially + * similar Disclaimer requirement for further binary redistribution. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY + * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "opt_inet.h" +#include "opt_ath.h" +#include "opt_wlan.h" + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/sysctl.h> +#include <sys/mbuf.h> +#include <sys/malloc.h> +#include <sys/lock.h> +#include <sys/mutex.h> +#include <sys/kernel.h> +#include <sys/socket.h> +#include <sys/sockio.h> +#include <sys/errno.h> +#include <sys/callout.h> +#include <sys/bus.h> +#include <sys/endian.h> +#include <sys/kthread.h> +#include <sys/taskqueue.h> +#include <sys/priv.h> + +#include <machine/bus.h> + +#include <net/if.h> +#include <net/if_dl.h> +#include <net/if_media.h> +#include <net/if_types.h> +#include <net/if_arp.h> +#include <net/ethernet.h> +#include <net/if_llc.h> + +#include <net80211/ieee80211_var.h> +#include <net80211/ieee80211_regdomain.h> +#ifdef IEEE80211_SUPPORT_SUPERG +#include <net80211/ieee80211_superg.h> +#endif +#ifdef IEEE80211_SUPPORT_TDMA +#include <net80211/ieee80211_tdma.h> +#endif + +#include <net/bpf.h> + +#ifdef INET +#include <netinet/in.h> +#include <netinet/if_ether.h> +#endif + +#include <dev/ath/if_athvar.h> +#include <dev/ath/ath_hal/ah_devid.h> /* XXX for softled */ +#include <dev/ath/ath_hal/ah_diagcodes.h> + +#ifdef ATH_TX99_DIAG +#include <dev/ath/ath_tx99/ath_tx99.h> +#endif + +#include <dev/ath/if_ath_tx_ht.h> + +/* + * Setup a 11n rate series structure + * + * This should be called for both legacy and MCS rates. + */ +static void +ath_rateseries_setup(struct ath_softc *sc, struct ieee80211_node *ni, + HAL_11N_RATE_SERIES *series, unsigned int pktlen, uint8_t *rix, + uint8_t *try) +{ + struct ieee80211com *ic = ni->ni_ic; + struct ath_hal *ah = sc->sc_ah; + HAL_BOOL shortPreamble = AH_FALSE; + const HAL_RATE_TABLE *rt = sc->sc_currates; + int i; + uint8_t txrate; + + if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && + (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) + shortPreamble = AH_TRUE; + + memset(series, 0, sizeof(HAL_11N_RATE_SERIES) * 4); + for (i = 0; i < 4; i++) { + txrate = rt->info[rix[i]].rateCode; + series[i].Tries = try[i]; + series[i].ChSel = sc->sc_txchainmask; + if (ic->ic_protmode == IEEE80211_PROT_RTSCTS || + ic->ic_protmode == IEEE80211_PROT_CTSONLY) + series[i].RateFlags |= HAL_RATESERIES_RTS_CTS; + if (ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) + series[i].RateFlags |= HAL_RATESERIES_2040; + if (ni->ni_htcap & IEEE80211_HTCAP_SHORTGI20 || + ni->ni_htcap & IEEE80211_HTCAP_SHORTGI40) + series[i].RateFlags |= HAL_RATESERIES_HALFGI; + + /* XXX should this check the short preamble value should be set for legacy rates? -adrian */ + series[i].Rate = txrate; + + /* PktDuration doesn't include slot, ACK, RTS, etc timing - it's just the packet duration */ + if (txrate & IEEE80211_RATE_MCS) { + series[i].PktDuration = + ath_computedur_ht(pktlen + , txrate + , ic->ic_rxstream + , (ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) + , shortPreamble); + } else { + series[i].PktDuration = ath_hal_computetxtime(ah, + rt, pktlen, rix[i], shortPreamble); + } + } +} + +#if 0 +static void +ath_rateseries_print(HAL_11N_RATE_SERIES *series) +{ + int i; + for (i = 0; i < 4; i++) { + printf("series %d: rate %x; tries %d; pktDuration %d; chSel %d; rateFlags %x\n", + i, + series[i].Rate, + series[i].Tries, + series[i].PktDuration, + series[i].ChSel, + series[i].RateFlags); + } +} +#endif + +/* + * Setup the 11n rate scenario and burst duration for the given TX descriptor + * list. + * + * This isn't useful for sending beacon frames, which has different needs + * wrt what's passed into the rate scenario function. + */ + +void +ath_buf_set_rate(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_buf *bf, + int pktlen, int flags, uint8_t ctsrate, uint8_t *rix, uint8_t *try) +{ + HAL_11N_RATE_SERIES series[4]; + struct ath_desc *ds = bf->bf_desc; + struct ath_desc *lastds = NULL; + struct ath_hal *ah = sc->sc_ah; + + /* Setup rate scenario */ + memset(&series, 0, sizeof(series)); + + ath_rateseries_setup(sc, ni, series, pktlen, rix, try); + + /* Enforce AR5416 aggregate limit - can't do RTS w/ an agg frame > 8k */ + + /* Enforce RTS and CTS are mutually exclusive */ + + /* Get a pointer to the last tx descriptor in the list */ + lastds = &bf->bf_desc[bf->bf_nseg - 1]; + + /* Set rate scenario */ + ath_hal_set11nratescenario(ah, ds, + ctsrate, /* rts/cts rate */ + 0, /* rts/cts duration */ + series, /* 11n rate series */ + 4, /* number of series */ + flags); + + /* Setup the last descriptor in the chain */ + ath_hal_setuplasttxdesc(ah, lastds, ds); + + /* Set burst duration */ + /* This should only be done if aggregate protection is enabled */ + //ath_hal_set11nburstduration(ah, ds, 8192); +} |
