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-rw-r--r--drivers/net/wireless/ath9k/ath9k.h14
-rw-r--r--drivers/net/wireless/ath9k/main.c27
-rw-r--r--drivers/net/wireless/ath9k/virtual.c147
3 files changed, 176 insertions, 12 deletions
diff --git a/drivers/net/wireless/ath9k/ath9k.h b/drivers/net/wireless/ath9k/ath9k.h
index 1153374f94fb..bc25075913ad 100644
--- a/drivers/net/wireless/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath9k/ath9k.h
@@ -563,6 +563,11 @@ struct ath_softc {
struct ath_wiphy **sec_wiphy; /* secondary wiphys (virtual radios); may
* have NULL entries */
int num_sec_wiphy; /* number of sec_wiphy pointers in the array */
+ int chan_idx;
+ int chan_is_ht;
+ struct ath_wiphy *next_wiphy;
+ struct work_struct chan_work;
+
struct tasklet_struct intr_tq;
struct tasklet_struct bcon_tasklet;
struct ath_hw *sc_ah;
@@ -626,6 +631,8 @@ struct ath_wiphy {
ATH_WIPHY_PAUSING,
ATH_WIPHY_PAUSED,
} state;
+ int chan_idx;
+ int chan_is_ht;
};
int ath_reset(struct ath_softc *sc, bool retry_tx);
@@ -652,6 +659,11 @@ void ath_detach(struct ath_softc *sc);
const char *ath_mac_bb_name(u32 mac_bb_version);
const char *ath_rf_name(u16 rf_version);
void ath_set_hw_capab(struct ath_softc *sc, struct ieee80211_hw *hw);
+void ath9k_update_ichannel(struct ath_softc *sc, struct ieee80211_hw *hw,
+ struct ath9k_channel *ichan);
+void ath_update_chainmask(struct ath_softc *sc, int is_ht);
+int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
+ struct ath9k_channel *hchan);
#ifdef CONFIG_PCI
int ath_pci_init(void);
@@ -694,5 +706,7 @@ int ath9k_wiphy_del(struct ath_wiphy *aphy);
void ath9k_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb);
int ath9k_wiphy_pause(struct ath_wiphy *aphy);
int ath9k_wiphy_unpause(struct ath_wiphy *aphy);
+int ath9k_wiphy_select(struct ath_wiphy *aphy);
+void ath9k_wiphy_chan_work(struct work_struct *work);
#endif /* ATH9K_H */
diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c
index 7e44013ba6e7..44959010c547 100644
--- a/drivers/net/wireless/ath9k/main.c
+++ b/drivers/net/wireless/ath9k/main.c
@@ -236,11 +236,11 @@ static void ath_setup_rates(struct ath_softc *sc, enum ieee80211_band band)
* by reseting the chip. To accomplish this we must first cleanup any pending
* DMA, then restart stuff.
*/
-static int ath_set_channel(struct ath_softc *sc, struct ath9k_channel *hchan)
+int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
+ struct ath9k_channel *hchan)
{
struct ath_hw *ah = sc->sc_ah;
bool fastcc = true, stopped;
- struct ieee80211_hw *hw = sc->hw;
struct ieee80211_channel *channel = hw->conf.channel;
int r;
@@ -414,7 +414,7 @@ set_timer:
* the chainmask configuration, for bt coexistence, use
* the chainmask configuration even in legacy mode.
*/
-static void ath_update_chainmask(struct ath_softc *sc, int is_ht)
+void ath_update_chainmask(struct ath_softc *sc, int is_ht)
{
sc->sc_flags |= SC_OP_CHAINMASK_UPDATE;
if (is_ht ||
@@ -1324,6 +1324,7 @@ void ath_detach(struct ath_softc *sc)
ath_deinit_rfkill(sc);
#endif
ath_deinit_leds(sc);
+ cancel_work_sync(&sc->chan_work);
for (i = 0; i < sc->num_sec_wiphy; i++) {
struct ath_wiphy *aphy = sc->sec_wiphy[i];
@@ -1669,6 +1670,8 @@ int ath_attach(u16 devid, struct ath_softc *sc)
ath9k_reg_apply_radar_flags(hw->wiphy);
ath9k_reg_apply_world_flags(hw->wiphy, REGDOM_SET_BY_INIT);
+ INIT_WORK(&sc->chan_work, ath9k_wiphy_chan_work);
+
error = ieee80211_register_hw(hw);
if (!ath9k_is_world_regd(sc->sc_ah)) {
@@ -1917,10 +1920,9 @@ int ath_get_mac80211_qnum(u32 queue, struct ath_softc *sc)
/* XXX: Remove me once we don't depend on ath9k_channel for all
* this redundant data */
-static void ath9k_update_ichannel(struct ath_softc *sc,
- struct ath9k_channel *ichan)
+void ath9k_update_ichannel(struct ath_softc *sc, struct ieee80211_hw *hw,
+ struct ath9k_channel *ichan)
{
- struct ieee80211_hw *hw = sc->hw;
struct ieee80211_channel *chan = hw->conf.channel;
struct ieee80211_conf *conf = &hw->conf;
@@ -1967,8 +1969,9 @@ static int ath9k_start(struct ieee80211_hw *hw)
pos = curchan->hw_value;
+ sc->chan_idx = pos;
init_channel = &sc->sc_ah->channels[pos];
- ath9k_update_ichannel(sc, init_channel);
+ ath9k_update_ichannel(sc, hw, init_channel);
/* Reset SERDES registers */
ath9k_hw_configpcipowersave(sc->sc_ah, 0);
@@ -2307,15 +2310,21 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
struct ieee80211_channel *curchan = hw->conf.channel;
int pos = curchan->hw_value;
+ aphy->chan_idx = pos;
+ aphy->chan_is_ht = conf_is_ht(conf);
+
+ /* TODO: do not change operation channel immediately if there
+ * are other virtual wiphys that use another channel */
+
DPRINTF(sc, ATH_DBG_CONFIG, "Set channel: %d MHz\n",
curchan->center_freq);
/* XXX: remove me eventualy */
- ath9k_update_ichannel(sc, &sc->sc_ah->channels[pos]);
+ ath9k_update_ichannel(sc, hw, &sc->sc_ah->channels[pos]);
ath_update_chainmask(sc, conf_is_ht(conf));
- if (ath_set_channel(sc, &sc->sc_ah->channels[pos]) < 0) {
+ if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
DPRINTF(sc, ATH_DBG_FATAL, "Unable to set channel\n");
mutex_unlock(&sc->mutex);
return -EINVAL;
diff --git a/drivers/net/wireless/ath9k/virtual.c b/drivers/net/wireless/ath9k/virtual.c
index a8bac97bd847..76ffdfa860ed 100644
--- a/drivers/net/wireless/ath9k/virtual.c
+++ b/drivers/net/wireless/ath9k/virtual.c
@@ -222,6 +222,81 @@ exit:
return -1;
}
+static bool __ath9k_wiphy_pausing(struct ath_softc *sc)
+{
+ int i;
+ if (sc->pri_wiphy->state == ATH_WIPHY_PAUSING)
+ return true;
+ for (i = 0; i < sc->num_sec_wiphy; i++) {
+ if (sc->sec_wiphy[i] &&
+ sc->sec_wiphy[i]->state == ATH_WIPHY_PAUSING)
+ return true;
+ }
+ return false;
+}
+
+static bool ath9k_wiphy_pausing(struct ath_softc *sc)
+{
+ bool ret;
+ spin_lock_bh(&sc->wiphy_lock);
+ ret = __ath9k_wiphy_pausing(sc);
+ spin_unlock_bh(&sc->wiphy_lock);
+ return ret;
+}
+
+static int __ath9k_wiphy_unpause(struct ath_wiphy *aphy);
+
+/* caller must hold wiphy_lock */
+static void __ath9k_wiphy_unpause_ch(struct ath_wiphy *aphy)
+{
+ if (aphy == NULL)
+ return;
+ if (aphy->chan_idx != aphy->sc->chan_idx)
+ return; /* wiphy not on the selected channel */
+ __ath9k_wiphy_unpause(aphy);
+}
+
+static void ath9k_wiphy_unpause_channel(struct ath_softc *sc)
+{
+ int i;
+ spin_lock_bh(&sc->wiphy_lock);
+ __ath9k_wiphy_unpause_ch(sc->pri_wiphy);
+ for (i = 0; i < sc->num_sec_wiphy; i++)
+ __ath9k_wiphy_unpause_ch(sc->sec_wiphy[i]);
+ spin_unlock_bh(&sc->wiphy_lock);
+}
+
+void ath9k_wiphy_chan_work(struct work_struct *work)
+{
+ struct ath_softc *sc = container_of(work, struct ath_softc, chan_work);
+ struct ath_wiphy *aphy = sc->next_wiphy;
+
+ if (aphy == NULL)
+ return;
+
+ /*
+ * All pending interfaces paused; ready to change
+ * channels.
+ */
+
+ /* Change channels */
+ mutex_lock(&sc->mutex);
+ /* XXX: remove me eventually */
+ ath9k_update_ichannel(sc, aphy->hw,
+ &sc->sc_ah->channels[sc->chan_idx]);
+ ath_update_chainmask(sc, sc->chan_is_ht);
+ if (ath_set_channel(sc, aphy->hw,
+ &sc->sc_ah->channels[sc->chan_idx]) < 0) {
+ printk(KERN_DEBUG "ath9k: Failed to set channel for new "
+ "virtual wiphy\n");
+ mutex_unlock(&sc->mutex);
+ return;
+ }
+ mutex_unlock(&sc->mutex);
+
+ ath9k_wiphy_unpause_channel(sc);
+}
+
/*
* ath9k version of ieee80211_tx_status() for TX frames that are generated
* internally in the driver.
@@ -244,6 +319,14 @@ void ath9k_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
*/
}
aphy->state = ATH_WIPHY_PAUSED;
+ if (!ath9k_wiphy_pausing(aphy->sc)) {
+ /*
+ * Drop from tasklet to work to allow mutex for channel
+ * change.
+ */
+ queue_work(aphy->sc->hw->workqueue,
+ &aphy->sc->chan_work);
+ }
}
kfree(tx_info_priv);
@@ -252,6 +335,14 @@ void ath9k_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
dev_kfree_skb(skb);
}
+static void ath9k_mark_paused(struct ath_wiphy *aphy)
+{
+ struct ath_softc *sc = aphy->sc;
+ aphy->state = ATH_WIPHY_PAUSED;
+ if (!__ath9k_wiphy_pausing(sc))
+ queue_work(sc->hw->workqueue, &sc->chan_work);
+}
+
static void ath9k_pause_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
{
struct ath_wiphy *aphy = data;
@@ -260,15 +351,19 @@ static void ath9k_pause_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
switch (vif->type) {
case NL80211_IFTYPE_STATION:
if (!vif->bss_conf.assoc) {
- aphy->state = ATH_WIPHY_PAUSED;
+ ath9k_mark_paused(aphy);
break;
}
/* TODO: could avoid this if already in PS mode */
- ath9k_send_nullfunc(aphy, vif, avp->bssid, 1);
+ if (ath9k_send_nullfunc(aphy, vif, avp->bssid, 1)) {
+ printk(KERN_DEBUG "%s: failed to send PS nullfunc\n",
+ __func__);
+ ath9k_mark_paused(aphy);
+ }
break;
case NL80211_IFTYPE_AP:
/* Beacon transmission is paused by aphy->state change */
- aphy->state = ATH_WIPHY_PAUSED;
+ ath9k_mark_paused(aphy);
break;
default:
break;
@@ -336,3 +431,49 @@ int ath9k_wiphy_unpause(struct ath_wiphy *aphy)
spin_unlock_bh(&aphy->sc->wiphy_lock);
return ret;
}
+
+/* caller must hold wiphy_lock */
+static void __ath9k_wiphy_pause_all(struct ath_softc *sc)
+{
+ int i;
+ if (sc->pri_wiphy->state == ATH_WIPHY_ACTIVE)
+ __ath9k_wiphy_pause(sc->pri_wiphy);
+ for (i = 0; i < sc->num_sec_wiphy; i++) {
+ if (sc->sec_wiphy[i] &&
+ sc->sec_wiphy[i]->state == ATH_WIPHY_ACTIVE)
+ __ath9k_wiphy_pause(sc->sec_wiphy[i]);
+ }
+}
+
+int ath9k_wiphy_select(struct ath_wiphy *aphy)
+{
+ struct ath_softc *sc = aphy->sc;
+ bool now;
+
+ spin_lock_bh(&sc->wiphy_lock);
+ if (__ath9k_wiphy_pausing(sc)) {
+ spin_unlock_bh(&sc->wiphy_lock);
+ return -EBUSY; /* previous select still in progress */
+ }
+
+ /* Store the new channel */
+ sc->chan_idx = aphy->chan_idx;
+ sc->chan_is_ht = aphy->chan_is_ht;
+ sc->next_wiphy = aphy;
+
+ __ath9k_wiphy_pause_all(sc);
+ now = !__ath9k_wiphy_pausing(aphy->sc);
+ spin_unlock_bh(&sc->wiphy_lock);
+
+ if (now) {
+ /* Ready to request channel change immediately */
+ queue_work(aphy->sc->hw->workqueue, &aphy->sc->chan_work);
+ }
+
+ /*
+ * wiphys will be unpaused in ath9k_tx_status() once channel has been
+ * changed if any wiphy needs time to become paused.
+ */
+
+ return 0;
+}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.