diff options
author | Sujith Manoharan <Sujith.Manoharan@atheros.com> | 2011-04-13 11:23:08 +0530 |
---|---|---|
committer | John W. Linville <linville@tuxdriver.com> | 2011-04-13 15:22:14 -0400 |
commit | 832f6a18fc2aead14954c081ece03b7a5b425f81 (patch) | |
tree | be7f379c29a67bb5e4565f90e4038caed4ba8d24 /drivers/net/wireless/ath/ath9k/htc_drv_beacon.c | |
parent | 1c165c972b040f9ce199b8d8d3cc4f619872cba5 (diff) |
ath9k_htc: Add beacon slots
Beacon transmission is now handled through a slot mechanism.
This allows multiple beaconing interfaces to be be present.
Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/htc_drv_beacon.c')
-rw-r--r-- | drivers/net/wireless/ath/ath9k/htc_drv_beacon.c | 123 |
1 files changed, 111 insertions, 12 deletions
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_beacon.c b/drivers/net/wireless/ath/ath9k/htc_drv_beacon.c index 8f56158e588..b561f703e46 100644 --- a/drivers/net/wireless/ath/ath9k/htc_drv_beacon.c +++ b/drivers/net/wireless/ath/ath9k/htc_drv_beacon.c @@ -172,12 +172,13 @@ static void ath9k_htc_beacon_config_ap(struct ath9k_htc_priv *priv, imask |= ATH9K_INT_SWBA; ath_dbg(common, ATH_DBG_CONFIG, - "AP Beacon config, intval: %d, nexttbtt: %u imask: 0x%x\n", + "AP Beacon config, intval: %d, nexttbtt: %u " + "imask: 0x%x\n", bss_conf->beacon_interval, nexttbtt, imask); WMI_CMD(WMI_DISABLE_INTR_CMDID); ath9k_hw_beaconinit(priv->ah, TU_TO_USEC(nexttbtt), TU_TO_USEC(intval)); - priv->bmiss_cnt = 0; + priv->cur_beacon_conf.bmiss_cnt = 0; htc_imask = cpu_to_be32(imask); WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask); } @@ -214,7 +215,7 @@ static void ath9k_htc_beacon_config_adhoc(struct ath9k_htc_priv *priv, WMI_CMD(WMI_DISABLE_INTR_CMDID); ath9k_hw_beaconinit(priv->ah, TU_TO_USEC(nexttbtt), TU_TO_USEC(intval)); - priv->bmiss_cnt = 0; + priv->cur_beacon_conf.bmiss_cnt = 0; htc_imask = cpu_to_be32(imask); WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask); } @@ -225,9 +226,11 @@ void ath9k_htc_beaconep(void *drv_priv, struct sk_buff *skb, dev_kfree_skb_any(skb); } -void ath9k_htc_swba(struct ath9k_htc_priv *priv, u8 beacon_pending) +static void ath9k_htc_send_beacon(struct ath9k_htc_priv *priv, + int slot) { - struct ath9k_htc_vif *avp = (void *)priv->vif->drv_priv; + struct ieee80211_vif *vif; + struct ath9k_htc_vif *avp; struct tx_beacon_header beacon_hdr; struct ath9k_htc_tx_ctl tx_ctl; struct ieee80211_tx_info *info; @@ -237,21 +240,18 @@ void ath9k_htc_swba(struct ath9k_htc_priv *priv, u8 beacon_pending) memset(&beacon_hdr, 0, sizeof(struct tx_beacon_header)); memset(&tx_ctl, 0, sizeof(struct ath9k_htc_tx_ctl)); - /* FIXME: Handle BMISS */ - if (beacon_pending != 0) { - priv->bmiss_cnt++; - return; - } - spin_lock_bh(&priv->beacon_lock); + vif = priv->cur_beacon_conf.bslot[slot]; + avp = (struct ath9k_htc_vif *)vif->drv_priv; + if (unlikely(priv->op_flags & OP_SCANNING)) { spin_unlock_bh(&priv->beacon_lock); return; } /* Get a new beacon */ - beacon = ieee80211_beacon_get(priv->hw, priv->vif); + beacon = ieee80211_beacon_get(priv->hw, vif); if (!beacon) { spin_unlock_bh(&priv->beacon_lock); return; @@ -276,6 +276,69 @@ void ath9k_htc_swba(struct ath9k_htc_priv *priv, u8 beacon_pending) spin_unlock_bh(&priv->beacon_lock); } +static int ath9k_htc_choose_bslot(struct ath9k_htc_priv *priv) +{ + struct ath_common *common = ath9k_hw_common(priv->ah); + unsigned long flags; + u64 tsf; + u32 tsftu; + u16 intval; + int slot; + + intval = priv->cur_beacon_conf.beacon_interval & ATH9K_BEACON_PERIOD; + + spin_lock_irqsave(&priv->wmi->wmi_lock, flags); + tsf = priv->wmi->tsf; + spin_unlock_irqrestore(&priv->wmi->wmi_lock, flags); + + tsftu = TSF_TO_TU(tsf >> 32, tsf); + slot = ((tsftu % intval) * ATH9K_HTC_MAX_BCN_VIF) / intval; + slot = ATH9K_HTC_MAX_BCN_VIF - slot - 1; + + ath_dbg(common, ATH_DBG_BEACON, + "Choose slot: %d, tsf: %llu, tsftu: %u, intval: %u\n", + slot, tsf, tsftu, intval); + + return slot; +} + +void ath9k_htc_swba(struct ath9k_htc_priv *priv) +{ + struct ath_common *common = ath9k_hw_common(priv->ah); + unsigned long flags; + int slot; + + spin_lock_irqsave(&priv->wmi->wmi_lock, flags); + if (priv->wmi->beacon_pending != 0) { + spin_unlock_irqrestore(&priv->wmi->wmi_lock, flags); + priv->cur_beacon_conf.bmiss_cnt++; + if (priv->cur_beacon_conf.bmiss_cnt > BSTUCK_THRESHOLD) { + ath_dbg(common, ATH_DBG_BEACON, + "Beacon stuck, HW reset\n"); + ath9k_htc_reset(priv); + } + return; + } + spin_unlock_irqrestore(&priv->wmi->wmi_lock, flags); + + if (priv->cur_beacon_conf.bmiss_cnt) { + ath_dbg(common, ATH_DBG_BEACON, + "Resuming beacon xmit after %u misses\n", + priv->cur_beacon_conf.bmiss_cnt); + priv->cur_beacon_conf.bmiss_cnt = 0; + } + + slot = ath9k_htc_choose_bslot(priv); + spin_lock_bh(&priv->beacon_lock); + if (priv->cur_beacon_conf.bslot[slot] == NULL) { + spin_unlock_bh(&priv->beacon_lock); + return; + } + spin_unlock_bh(&priv->beacon_lock); + + ath9k_htc_send_beacon(priv, slot); +} + /* Currently, only for IBSS */ void ath9k_htc_beaconq_config(struct ath9k_htc_priv *priv) { @@ -307,6 +370,42 @@ void ath9k_htc_beaconq_config(struct ath9k_htc_priv *priv) } } +void ath9k_htc_assign_bslot(struct ath9k_htc_priv *priv, + struct ieee80211_vif *vif) +{ + struct ath_common *common = ath9k_hw_common(priv->ah); + struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv; + int i = 0; + + spin_lock_bh(&priv->beacon_lock); + for (i = 0; i < ATH9K_HTC_MAX_BCN_VIF; i++) { + if (priv->cur_beacon_conf.bslot[i] == NULL) { + avp->bslot = i; + break; + } + } + + priv->cur_beacon_conf.bslot[avp->bslot] = vif; + spin_unlock_bh(&priv->beacon_lock); + + ath_dbg(common, ATH_DBG_CONFIG, + "Added interface at beacon slot: %d\n", avp->bslot); +} + +void ath9k_htc_remove_bslot(struct ath9k_htc_priv *priv, + struct ieee80211_vif *vif) +{ + struct ath_common *common = ath9k_hw_common(priv->ah); + struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv; + + spin_lock_bh(&priv->beacon_lock); + priv->cur_beacon_conf.bslot[avp->bslot] = NULL; + spin_unlock_bh(&priv->beacon_lock); + + ath_dbg(common, ATH_DBG_CONFIG, + "Removed interface at beacon slot: %d\n", avp->bslot); +} + static void ath9k_htc_beacon_iter(void *data, u8 *mac, struct ieee80211_vif *vif) { bool *beacon_configured = (bool *)data; |