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[ath] set the relevant TOA/TOD locationing bits when trying to do locationing.

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* Don't do RTS/CTS - experiments show that we get ACK frames for each of them
  and this ends up causing the timestamps to look all funny.
* Set the HAL_TXDESC_POS bit, so the AR9300 HAL sets up the hardware to return
  location and CSI information.
This commit is contained in:
Adrian Chadd 2016-09-12 04:55:13 +00:00
parent bd3b336251
commit 5abc0b2590
1 changed files with 50 additions and 0 deletions
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50
sys/dev/ath/if_ath_tx.c
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@ -1042,6 +1042,14 @@ ath_tx_calc_protection(struct ath_softc *sc, struct ath_buf *bf)
shortPreamble = bf->bf_state.bfs_shpream;
wh = mtod(bf->bf_m, struct ieee80211_frame *);
/* Disable frame protection for TOA probe frames */
if (bf->bf_flags & ATH_BUF_TOA_PROBE) {
/* XXX count */
flags &= ~(HAL_TXDESC_CTSENA | HAL_TXDESC_RTSENA);
bf->bf_state.bfs_doprot = 0;
goto finish;
}
/*
* If 802.11g protection is enabled, determine whether
* to use RTS/CTS or just CTS. Note that this is only
@ -1081,6 +1089,8 @@ ath_tx_calc_protection(struct ath_softc *sc, struct ath_buf *bf)
flags |= HAL_TXDESC_RTSENA;
sc->sc_stats.ast_tx_htprotect++;
}
finish:
bf->bf_state.bfs_txflags = flags;
}
@ -1739,6 +1749,34 @@ ath_tx_normal_setup(struct ath_softc *sc, struct ieee80211_node *ni,
}
#endif
/*
* If it's a frame to do location reporting on,
* communicate it to the HAL.
*/
if (ieee80211_get_toa_params(m0, NULL)) {
device_printf(sc->sc_dev,
"%s: setting TX positioning bit\n", __func__);
flags |= HAL_TXDESC_POS;
/*
* Note: The hardware reports timestamps for
* each of the RX'ed packets as part of the packet
* exchange. So this means things like RTS/CTS
* exchanges, as well as the final ACK.
*
* So, if you send a RTS-protected NULL data frame,
* you'll get an RX report for the RTS response, then
* an RX report for the NULL frame, and then the TX
* completion at the end.
*
* NOTE: it doesn't work right for CCK frames;
* there's no channel info data provided unless
* it's OFDM or HT. Will have to dig into it.
*/
flags &= ~(HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA);
bf->bf_flags |= ATH_BUF_TOA_PROBE;
}
#if 0
/*
* Placeholder: if you want to transmit with the azimuth
@ -2175,6 +2213,18 @@ ath_tx_raw_start(struct ath_softc *sc, struct ieee80211_node *ni,
try0 = ATH_TXMAXTRY; /* XXX?too many? */
}
/*
* If it's a frame to do location reporting on,
* communicate it to the HAL.
*/
if (ieee80211_get_toa_params(m0, NULL)) {
device_printf(sc->sc_dev,
"%s: setting TX positioning bit\n", __func__);
flags |= HAL_TXDESC_POS;
flags &= ~(HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA);
bf->bf_flags |= ATH_BUF_TOA_PROBE;
}
txrate = rt->info[rix].rateCode;
if (params->ibp_flags & IEEE80211_BPF_SHORTPRE)
txrate |= rt->info[rix].shortPreamble;