2 * Copyright (c) 2008-2009 Atheros Communications Inc.
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 struct ath9k_vif_iter_data {
24 static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
26 struct ath9k_vif_iter_data *iter_data = data;
29 nbuf = krealloc(iter_data->addr, (iter_data->count + 1) * ETH_ALEN,
34 memcpy(nbuf + iter_data->count * ETH_ALEN, mac, ETH_ALEN);
35 iter_data->addr = nbuf;
39 void ath9k_set_bssid_mask(struct ieee80211_hw *hw)
41 struct ath_wiphy *aphy = hw->priv;
42 struct ath_softc *sc = aphy->sc;
43 struct ath9k_vif_iter_data iter_data;
48 * Add primary MAC address even if it is not in active use since it
49 * will be configured to the hardware as the starting point and the
50 * BSSID mask will need to be changed if another address is active.
52 iter_data.addr = kmalloc(ETH_ALEN, GFP_ATOMIC);
54 memcpy(iter_data.addr, sc->sc_ah->macaddr, ETH_ALEN);
59 /* Get list of all active MAC addresses */
60 spin_lock_bh(&sc->wiphy_lock);
61 ieee80211_iterate_active_interfaces_atomic(sc->hw, ath9k_vif_iter,
63 for (i = 0; i < sc->num_sec_wiphy; i++) {
64 if (sc->sec_wiphy[i] == NULL)
66 ieee80211_iterate_active_interfaces_atomic(
67 sc->sec_wiphy[i]->hw, ath9k_vif_iter, &iter_data);
69 spin_unlock_bh(&sc->wiphy_lock);
71 /* Generate an address mask to cover all active addresses */
72 memset(mask, 0, ETH_ALEN);
73 for (i = 0; i < iter_data.count; i++) {
74 u8 *a1 = iter_data.addr + i * ETH_ALEN;
75 for (j = i + 1; j < iter_data.count; j++) {
76 u8 *a2 = iter_data.addr + j * ETH_ALEN;
77 mask[0] |= a1[0] ^ a2[0];
78 mask[1] |= a1[1] ^ a2[1];
79 mask[2] |= a1[2] ^ a2[2];
80 mask[3] |= a1[3] ^ a2[3];
81 mask[4] |= a1[4] ^ a2[4];
82 mask[5] |= a1[5] ^ a2[5];
86 kfree(iter_data.addr);
88 /* Invert the mask and configure hardware */
89 sc->bssidmask[0] = ~mask[0];
90 sc->bssidmask[1] = ~mask[1];
91 sc->bssidmask[2] = ~mask[2];
92 sc->bssidmask[3] = ~mask[3];
93 sc->bssidmask[4] = ~mask[4];
94 sc->bssidmask[5] = ~mask[5];
96 ath9k_hw_setbssidmask(sc);
99 int ath9k_wiphy_add(struct ath_softc *sc)
102 struct ath_wiphy *aphy;
103 struct ieee80211_hw *hw;
106 hw = ieee80211_alloc_hw(sizeof(struct ath_wiphy), &ath9k_ops);
110 spin_lock_bh(&sc->wiphy_lock);
111 for (i = 0; i < sc->num_sec_wiphy; i++) {
112 if (sc->sec_wiphy[i] == NULL)
116 if (i == sc->num_sec_wiphy) {
117 /* No empty slot available; increase array length */
118 struct ath_wiphy **n;
119 n = krealloc(sc->sec_wiphy,
120 (sc->num_sec_wiphy + 1) *
121 sizeof(struct ath_wiphy *),
124 spin_unlock_bh(&sc->wiphy_lock);
125 ieee80211_free_hw(hw);
133 SET_IEEE80211_DEV(hw, sc->dev);
138 sc->sec_wiphy[i] = aphy;
139 spin_unlock_bh(&sc->wiphy_lock);
141 memcpy(addr, sc->sc_ah->macaddr, ETH_ALEN);
142 addr[0] |= 0x02; /* Locally managed address */
144 * XOR virtual wiphy index into the least significant bits to generate
145 * a different MAC address for each virtual wiphy.
148 addr[4] ^= (i & 0xff00) >> 8;
149 addr[3] ^= (i & 0xff0000) >> 16;
151 SET_IEEE80211_PERM_ADDR(hw, addr);
153 ath_set_hw_capab(sc, hw);
155 error = ieee80211_register_hw(hw);
160 int ath9k_wiphy_del(struct ath_wiphy *aphy)
162 struct ath_softc *sc = aphy->sc;
165 spin_lock_bh(&sc->wiphy_lock);
166 for (i = 0; i < sc->num_sec_wiphy; i++) {
167 if (aphy == sc->sec_wiphy[i]) {
168 sc->sec_wiphy[i] = NULL;
169 spin_unlock_bh(&sc->wiphy_lock);
170 ieee80211_unregister_hw(aphy->hw);
171 ieee80211_free_hw(aphy->hw);
175 spin_unlock_bh(&sc->wiphy_lock);
179 static int ath9k_send_nullfunc(struct ath_wiphy *aphy,
180 struct ieee80211_vif *vif, const u8 *bssid,
183 struct ath_softc *sc = aphy->sc;
184 struct ath_tx_control txctl;
186 struct ieee80211_hdr *hdr;
188 struct ieee80211_tx_info *info;
190 skb = dev_alloc_skb(24);
193 hdr = (struct ieee80211_hdr *) skb_put(skb, 24);
195 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
196 IEEE80211_FCTL_TODS);
198 fc |= cpu_to_le16(IEEE80211_FCTL_PM);
199 hdr->frame_control = fc;
200 memcpy(hdr->addr1, bssid, ETH_ALEN);
201 memcpy(hdr->addr2, aphy->hw->wiphy->perm_addr, ETH_ALEN);
202 memcpy(hdr->addr3, bssid, ETH_ALEN);
204 info = IEEE80211_SKB_CB(skb);
205 memset(info, 0, sizeof(*info));
206 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS;
207 info->control.vif = vif;
208 info->control.rates[0].idx = 0;
209 info->control.rates[0].count = 4;
210 info->control.rates[1].idx = -1;
212 memset(&txctl, 0, sizeof(struct ath_tx_control));
213 txctl.txq = &sc->tx.txq[sc->tx.hwq_map[ATH9K_WME_AC_VO]];
214 txctl.frame_type = ps ? ATH9K_INT_PAUSE : ATH9K_INT_UNPAUSE;
216 if (ath_tx_start(aphy->hw, skb, &txctl) != 0)
221 dev_kfree_skb_any(skb);
226 * ath9k version of ieee80211_tx_status() for TX frames that are generated
227 * internally in the driver.
229 void ath9k_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
231 struct ath_wiphy *aphy = hw->priv;
232 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
233 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
234 struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
236 if (tx_info_priv && tx_info_priv->frame_type == ATH9K_INT_PAUSE &&
237 aphy->state == ATH_WIPHY_PAUSING) {
238 if (!(info->flags & IEEE80211_TX_STAT_ACK)) {
239 printk(KERN_DEBUG "ath9k: %s: no ACK for pause "
240 "frame\n", wiphy_name(hw->wiphy));
242 * The AP did not reply; ignore this to allow us to
246 aphy->state = ATH_WIPHY_PAUSED;
250 tx_info->rate_driver_data[0] = NULL;
255 static void ath9k_pause_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
257 struct ath_wiphy *aphy = data;
258 struct ath_vif *avp = (void *) vif->drv_priv;
261 case NL80211_IFTYPE_STATION:
262 if (!vif->bss_conf.assoc) {
263 aphy->state = ATH_WIPHY_PAUSED;
266 /* TODO: could avoid this if already in PS mode */
267 ath9k_send_nullfunc(aphy, vif, avp->bssid, 1);
269 case NL80211_IFTYPE_AP:
270 /* Beacon transmission is paused by aphy->state change */
271 aphy->state = ATH_WIPHY_PAUSED;
278 /* caller must hold wiphy_lock */
279 static int __ath9k_wiphy_pause(struct ath_wiphy *aphy)
281 ieee80211_stop_queues(aphy->hw);
282 aphy->state = ATH_WIPHY_PAUSING;
284 * TODO: handle PAUSING->PAUSED for the case where there are multiple
285 * active vifs (now we do it on the first vif getting ready; should be
288 ieee80211_iterate_active_interfaces_atomic(aphy->hw, ath9k_pause_iter,
293 int ath9k_wiphy_pause(struct ath_wiphy *aphy)
296 spin_lock_bh(&aphy->sc->wiphy_lock);
297 ret = __ath9k_wiphy_pause(aphy);
298 spin_unlock_bh(&aphy->sc->wiphy_lock);
302 static void ath9k_unpause_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
304 struct ath_wiphy *aphy = data;
305 struct ath_vif *avp = (void *) vif->drv_priv;
308 case NL80211_IFTYPE_STATION:
309 if (!vif->bss_conf.assoc)
311 ath9k_send_nullfunc(aphy, vif, avp->bssid, 0);
313 case NL80211_IFTYPE_AP:
314 /* Beacon transmission is re-enabled by aphy->state change */
321 /* caller must hold wiphy_lock */
322 static int __ath9k_wiphy_unpause(struct ath_wiphy *aphy)
324 ieee80211_iterate_active_interfaces_atomic(aphy->hw,
325 ath9k_unpause_iter, aphy);
326 aphy->state = ATH_WIPHY_ACTIVE;
327 ieee80211_wake_queues(aphy->hw);
331 int ath9k_wiphy_unpause(struct ath_wiphy *aphy)
334 spin_lock_bh(&aphy->sc->wiphy_lock);
335 ret = __ath9k_wiphy_unpause(aphy);
336 spin_unlock_bh(&aphy->sc->wiphy_lock);