diff options
Diffstat (limited to 'drivers/net/wireless/ath9k/virtual.c')
| -rw-r--r-- | drivers/net/wireless/ath9k/virtual.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath9k/virtual.c b/drivers/net/wireless/ath9k/virtual.c index 67bcb9343ca..a8bac97bd84 100644 --- a/drivers/net/wireless/ath9k/virtual.c +++ b/drivers/net/wireless/ath9k/virtual.c @@ -175,3 +175,164 @@ int ath9k_wiphy_del(struct ath_wiphy *aphy) spin_unlock_bh(&sc->wiphy_lock); return -ENOENT; } + +static int ath9k_send_nullfunc(struct ath_wiphy *aphy, + struct ieee80211_vif *vif, const u8 *bssid, + int ps) +{ + struct ath_softc *sc = aphy->sc; + struct ath_tx_control txctl; + struct sk_buff *skb; + struct ieee80211_hdr *hdr; + __le16 fc; + struct ieee80211_tx_info *info; + + skb = dev_alloc_skb(24); + if (skb == NULL) + return -ENOMEM; + hdr = (struct ieee80211_hdr *) skb_put(skb, 24); + memset(hdr, 0, 24); + fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | + IEEE80211_FCTL_TODS); + if (ps) + fc |= cpu_to_le16(IEEE80211_FCTL_PM); + hdr->frame_control = fc; + memcpy(hdr->addr1, bssid, ETH_ALEN); + memcpy(hdr->addr2, aphy->hw->wiphy->perm_addr, ETH_ALEN); + memcpy(hdr->addr3, bssid, ETH_ALEN); + + info = IEEE80211_SKB_CB(skb); + memset(info, 0, sizeof(*info)); + info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS; + info->control.vif = vif; + info->control.rates[0].idx = 0; + info->control.rates[0].count = 4; + info->control.rates[1].idx = -1; + + memset(&txctl, 0, sizeof(struct ath_tx_control)); + txctl.txq = &sc->tx.txq[sc->tx.hwq_map[ATH9K_WME_AC_VO]]; + txctl.frame_type = ps ? ATH9K_INT_PAUSE : ATH9K_INT_UNPAUSE; + + if (ath_tx_start(aphy->hw, skb, &txctl) != 0) + goto exit; + + return 0; +exit: + dev_kfree_skb_any(skb); + return -1; +} + +/* + * ath9k version of ieee80211_tx_status() for TX frames that are generated + * internally in the driver. + */ +void ath9k_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) +{ + struct ath_wiphy *aphy = hw->priv; + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); + struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info); + + if (tx_info_priv && tx_info_priv->frame_type == ATH9K_INT_PAUSE && + aphy->state == ATH_WIPHY_PAUSING) { + if (!(info->flags & IEEE80211_TX_STAT_ACK)) { + printk(KERN_DEBUG "ath9k: %s: no ACK for pause " + "frame\n", wiphy_name(hw->wiphy)); + /* + * The AP did not reply; ignore this to allow us to + * continue. + */ + } + aphy->state = ATH_WIPHY_PAUSED; + } + + kfree(tx_info_priv); + tx_info->rate_driver_data[0] = NULL; + + dev_kfree_skb(skb); +} + +static void ath9k_pause_iter(void *data, u8 *mac, struct ieee80211_vif *vif) +{ + struct ath_wiphy *aphy = data; + struct ath_vif *avp = (void *) vif->drv_priv; + + switch (vif->type) { + case NL80211_IFTYPE_STATION: + if (!vif->bss_conf.assoc) { + aphy->state = ATH_WIPHY_PAUSED; + break; + } + /* TODO: could avoid this if already in PS mode */ + ath9k_send_nullfunc(aphy, vif, avp->bssid, 1); + break; + case NL80211_IFTYPE_AP: + /* Beacon transmission is paused by aphy->state change */ + aphy->state = ATH_WIPHY_PAUSED; + break; + default: + break; + } +} + +/* caller must hold wiphy_lock */ +static int __ath9k_wiphy_pause(struct ath_wiphy *aphy) +{ + ieee80211_stop_queues(aphy->hw); + aphy->state = ATH_WIPHY_PAUSING; + /* + * TODO: handle PAUSING->PAUSED for the case where there are multiple + * active vifs (now we do it on the first vif getting ready; should be + * on the last) + */ + ieee80211_iterate_active_interfaces_atomic(aphy->hw, ath9k_pause_iter, + aphy); + return 0; +} + +int ath9k_wiphy_pause(struct ath_wiphy *aphy) +{ + int ret; + spin_lock_bh(&aphy->sc->wiphy_lock); + ret = __ath9k_wiphy_pause(aphy); + spin_unlock_bh(&aphy->sc->wiphy_lock); + return ret; +} + +static void ath9k_unpause_iter(void *data, u8 *mac, struct ieee80211_vif *vif) +{ + struct ath_wiphy *aphy = data; + struct ath_vif *avp = (void *) vif->drv_priv; + + switch (vif->type) { + case NL80211_IFTYPE_STATION: + if (!vif->bss_conf.assoc) + break; + ath9k_send_nullfunc(aphy, vif, avp->bssid, 0); + break; + case NL80211_IFTYPE_AP: + /* Beacon transmission is re-enabled by aphy->state change */ + break; + default: + break; + } +} + +/* caller must hold wiphy_lock */ +static int __ath9k_wiphy_unpause(struct ath_wiphy *aphy) +{ + ieee80211_iterate_active_interfaces_atomic(aphy->hw, + ath9k_unpause_iter, aphy); + aphy->state = ATH_WIPHY_ACTIVE; + ieee80211_wake_queues(aphy->hw); + return 0; +} + +int ath9k_wiphy_unpause(struct ath_wiphy *aphy) +{ + int ret; + spin_lock_bh(&aphy->sc->wiphy_lock); + ret = __ath9k_wiphy_unpause(aphy); + spin_unlock_bh(&aphy->sc->wiphy_lock); + return ret; +} |