diff options
| -rw-r--r-- | sys/dev/ath/if_ath_tdma.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/sys/dev/ath/if_ath_tdma.c b/sys/dev/ath/if_ath_tdma.c index 92e5e51..5b82069 100644 --- a/sys/dev/ath/if_ath_tdma.c +++ b/sys/dev/ath/if_ath_tdma.c @@ -328,6 +328,16 @@ ath_tdma_config(struct ath_softc *sc, struct ieee80211vap *vap) * beacon timers so we follow their schedule. Note that * by using the rx timestamp we implicitly include the * propagation delay in our schedule. + * + * XXX TODO: since the changes for the AR5416 and later chips + * involved changing the TSF/TU calculations, we need to make + * sure that various calculations wrap consistently. + * + * A lot of the problems stemmed from the calculations wrapping + * at 65,535 TU. Since a lot of the math is still being done in + * TU, please audit it to ensure that when the TU values programmed + * into the timers wrap at (2^31)-1 TSF, all the various terms + * wrap consistently. */ void ath_tdma_update(struct ieee80211_node *ni, @@ -541,8 +551,8 @@ ath_tdma_update(struct ieee80211_node *ni, struct if_ath_alq_tdma_tsf_adjust t; t.tsfdelta = htobe32(tsfdelta); - t.tsf64_old = htobe64(tsf_1); - t.tsf64_new = htobe64(tsf_1 + tsfdelta); + t.tsf64_old = htobe64(tsf); + t.tsf64_new = htobe64(tsf + tsfdelta); if_ath_alq_post(&sc->sc_alq, ATH_ALQ_TDMA_TSF_ADJUST, sizeof(t), (char *) &t); } |
