/*
* Associates the beacon frame buffer with a transmit descriptor. Will set
* up all required antenna switch parameters, rate codes, and channel flags.
* Beacons are always sent out at the lowest rate, and are not retried.
*/
static void ath_beacon_setup(struct ath_softc *sc, struct ath_vif *avp,
struct ath_buf *bf, int rateidx)
{
struct sk_buff *skb = bf->bf_mpdu;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ath_desc *ds;
struct ath9k_11n_rate_series series[4];
int flags, antenna, ctsrate = 0, ctsduration = 0;
struct ieee80211_supported_band *sband;
u8 rate = 0;
ds = bf->bf_desc;
flags = ATH9K_TXDESC_NOACK;
ds->ds_link = 0;
/*
* Switch antenna every beacon.
* Should only switch every beacon period, not for every SWBA
* XXX assumes two antennae
*/
antenna = ((sc->beacon.ast_be_xmit / sc->nbcnvifs) & 1 ? 2 : 1);
sband = &sc->sbands[common->hw->conf.channel->band];
rate = sband->bitrates[rateidx].hw_value;
if (sc->sc_flags & SC_OP_PREAMBLE_SHORT)
rate |= sband->bitrates[rateidx].hw_value_short;
ath9k_hw_set11n_txdesc(ah, ds, skb->len + FCS_LEN,
ATH9K_PKT_TYPE_BEACON,
MAX_RATE_POWER,
ATH9K_TXKEYIX_INVALID,
ATH9K_KEY_TYPE_CLEAR,
flags);
/* NB: beacon's BufLen must be a multiple of 4 bytes */
ath9k_hw_filltxdesc(ah, ds, roundup(skb->len, 4),
true, true, ds, bf->bf_buf_addr,
sc->beacon.beaconq);
memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4);
series[0].Tries = 1;
series[0].Rate = rate;
series[0].ChSel = ath_txchainmask_reduction(sc,
common->tx_chainmask, series[0].Rate);
series[0].RateFlags = (ctsrate) ? ATH9K_RATESERIES_RTS_CTS : 0;
ath9k_hw_set11n_ratescenario(ah, ds, ds, 0, ctsrate, ctsduration,
series, 4, 0);
}
/*
* Setup the beacon frame for transmit.
*
* Associates the beacon frame buffer with a transmit descriptor. Will set
* up all required antenna switch parameters, rate codes, and channel flags.
* Beacons are always sent out at the lowest rate, and are not retried.
*/
static void ath_beacon_setup(struct ath_softc *sc,
struct ath_vap *avp, struct ath_buf *bf)
{
struct sk_buff *skb = (struct sk_buff *)bf->bf_mpdu;
struct ath_hal *ah = sc->sc_ah;
struct ath_desc *ds;
struct ath9k_11n_rate_series series[4];
const struct ath9k_rate_table *rt;
int flags, antenna;
u8 rix, rate;
int ctsrate = 0;
int ctsduration = 0;
DPRINTF(sc, ATH_DBG_BEACON, "%s: m %p len %u\n",
__func__, skb, skb->len);
/* setup descriptors */
ds = bf->bf_desc;
flags = ATH9K_TXDESC_NOACK;
if (sc->sc_ah->ah_opmode == ATH9K_M_IBSS &&
(ah->ah_caps.hw_caps & ATH9K_HW_CAP_VEOL)) {
ds->ds_link = bf->bf_daddr; /* self-linked */
flags |= ATH9K_TXDESC_VEOL;
/* Let hardware handle antenna switching. */
antenna = 0;
} else {
ds->ds_link = 0;
/*
* Switch antenna every beacon.
* Should only switch every beacon period, not for every
* SWBA's
* XXX assumes two antenna
*/
antenna = ((sc->ast_be_xmit / sc->sc_nbcnvaps) & 1 ? 2 : 1);
}
ds->ds_data = bf->bf_buf_addr;
/*
* Calculate rate code.
* XXX everything at min xmit rate
*/
rix = 0;
rt = sc->sc_currates;
rate = rt->info[rix].rateCode;
if (sc->sc_flags & SC_OP_PREAMBLE_SHORT)
rate |= rt->info[rix].shortPreamble;
ath9k_hw_set11n_txdesc(ah, ds,
skb->len + FCS_LEN, /* frame length */
ATH9K_PKT_TYPE_BEACON, /* Atheros packet type */
avp->av_btxctl.txpower, /* txpower XXX */
ATH9K_TXKEYIX_INVALID, /* no encryption */
ATH9K_KEY_TYPE_CLEAR, /* no encryption */
flags /* no ack,
veol for beacons */
);
/* NB: beacon's BufLen must be a multiple of 4 bytes */
ath9k_hw_filltxdesc(ah, ds,
roundup(skb->len, 4), /* buffer length */
true, /* first segment */
true, /* last segment */
ds /* first descriptor */
);
memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4);
series[0].Tries = 1;
series[0].Rate = rate;
series[0].ChSel = sc->sc_tx_chainmask;
series[0].RateFlags = (ctsrate) ? ATH9K_RATESERIES_RTS_CTS : 0;
ath9k_hw_set11n_ratescenario(ah, ds, ds, 0,
ctsrate, ctsduration, series, 4, 0);
}
