From: Sujith Manoharan <sujith.manoha...@atheros.com>
Multiple interfaces can be configured if a slot is free
on the target. Monitor mode also requires a slot.
The maximum number of stations that can be handled in
the firmware is 8, manage the station slots accordingly.
Signed-off-by: Sujith Manoharan <sujith.manoha...@atheros.com>
---
drivers/net/wireless/ath/ath9k/htc.h | 7 +
drivers/net/wireless/ath/ath9k/htc_drv_main.c | 148 +++++++++++++++++--------
drivers/net/wireless/ath/ath9k/htc_drv_txrx.c | 29 ++++-
3 files changed, 130 insertions(+), 54 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/htc.h
b/drivers/net/wireless/ath/ath9k/htc.h
index 6354986..ff6bfd9 100644
--- a/drivers/net/wireless/ath/ath9k/htc.h
+++ b/drivers/net/wireless/ath/ath9k/htc.h
@@ -204,6 +204,8 @@ struct ath9k_htc_target_stats {
__be32 ht_tx_xretries;
} __packed;
+#define ATH9K_HTC_MAX_VIF 2
+
struct ath9k_htc_vif {
u8 index;
};
@@ -358,6 +360,11 @@ struct ath9k_htc_priv {
enum htc_endpoint_id data_vi_ep;
enum htc_endpoint_id data_vo_ep;
+ u8 vif_slot;
+ u8 mon_vif_idx;
+ u8 sta_slot;
+ u8 vif_sta_pos[ATH9K_HTC_MAX_VIF];
+
u16 op_flags;
u16 curtxpow;
u16 txpowlimit;
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_main.c
b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
index f14f37d..e8e512a 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_main.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
@@ -236,6 +236,13 @@ err:
return ret;
}
+/*
+ * Monitor mode handling is a tad complicated because the firmware requires
+ * an interface to be created exclusively, while mac80211 doesn't associate
+ * an interface with the mode.
+ *
+ * So, for now, only one monitor interface can be configured.
+ */
static void __ath9k_htc_remove_monitor_interface(struct ath9k_htc_priv *priv)
{
struct ath_common *common = ath9k_hw_common(priv->ah);
@@ -245,9 +252,10 @@ static void __ath9k_htc_remove_monitor_interface(struct
ath9k_htc_priv *priv)
memset(&hvif, 0, sizeof(struct ath9k_htc_target_vif));
memcpy(&hvif.myaddr, common->macaddr, ETH_ALEN);
- hvif.index = 0; /* Should do for now */
+ hvif.index = priv->mon_vif_idx;
WMI_CMD_BUF(WMI_VAP_REMOVE_CMDID, &hvif);
priv->nvifs--;
+ priv->vif_slot &= ~(1 << priv->mon_vif_idx);
}
static int ath9k_htc_add_monitor_interface(struct ath9k_htc_priv *priv)
@@ -255,51 +263,69 @@ static int ath9k_htc_add_monitor_interface(struct
ath9k_htc_priv *priv)
struct ath_common *common = ath9k_hw_common(priv->ah);
struct ath9k_htc_target_vif hvif;
struct ath9k_htc_target_sta tsta;
- int ret = 0;
+ int ret = 0, sta_idx;
u8 cmd_rsp;
- if (priv->nvifs > 0)
- return -ENOBUFS;
+ if ((priv->nvifs >= ATH9K_HTC_MAX_VIF) ||
+ (priv->nstations >= ATH9K_HTC_MAX_STA)) {
+ ret = -ENOBUFS;
+ goto err_vif;
+ }
- if (priv->nstations >= ATH9K_HTC_MAX_STA)
- return -ENOBUFS;
+ sta_idx = ffz(priv->sta_slot);
+ if ((sta_idx < 0) || (sta_idx > ATH9K_HTC_MAX_STA)) {
+ ret = -ENOBUFS;
+ goto err_vif;
+ }
/*
* Add an interface.
*/
-
memset(&hvif, 0, sizeof(struct ath9k_htc_target_vif));
memcpy(&hvif.myaddr, common->macaddr, ETH_ALEN);
hvif.opmode = cpu_to_be32(HTC_M_MONITOR);
- priv->ah->opmode = NL80211_IFTYPE_MONITOR;
- hvif.index = priv->nvifs;
+ hvif.index = ffz(priv->vif_slot);
WMI_CMD_BUF(WMI_VAP_CREATE_CMDID, &hvif);
if (ret)
- return ret;
+ goto err_vif;
+
+ /*
+ * Assign the monitor interface index as a special case here.
+ * This is needed when the interface is brought down.
+ */
+ priv->mon_vif_idx = hvif.index;
+ priv->vif_slot |= (1 << hvif.index);
+
+ /*
+ * Set the hardware mode to monitor only if there are no
+ * other interfaces.
+ */
+ if (!priv->nvifs)
+ priv->ah->opmode = NL80211_IFTYPE_MONITOR;
priv->nvifs++;
/*
* Associate a station with the interface for packet injection.
*/
-
memset(&tsta, 0, sizeof(struct ath9k_htc_target_sta));
memcpy(&tsta.macaddr, common->macaddr, ETH_ALEN);
tsta.is_vif_sta = 1;
- tsta.sta_index = priv->nstations;
+ tsta.sta_index = sta_idx;
tsta.vif_index = hvif.index;
tsta.maxampdu = 0xffff;
WMI_CMD_BUF(WMI_NODE_CREATE_CMDID, &tsta);
if (ret) {
ath_err(common, "Unable to add station entry for monitor
mode\n");
- goto err_vif;
+ goto err_sta;
}
+ priv->sta_slot |= (1 << sta_idx);
priv->nstations++;
/*
@@ -310,15 +336,23 @@ static int ath9k_htc_add_monitor_interface(struct
ath9k_htc_priv *priv)
ath_dbg(common, ATH_DBG_CONFIG,
"Failed to update capability in target\n");
+ priv->vif_sta_pos[priv->mon_vif_idx] = sta_idx;
priv->ah->is_monitoring = true;
+ ath_dbg(common, ATH_DBG_CONFIG,
+ "Attached a monitor interface at idx: %d, sta idx: %d\n",
+ priv->mon_vif_idx, sta_idx);
+
return 0;
-err_vif:
+err_sta:
/*
* Remove the interface from the target.
*/
__ath9k_htc_remove_monitor_interface(priv);
+err_vif:
+ ath_dbg(common, ATH_DBG_FATAL, "Unable to attach a monitor
interface\n");
+
return ret;
}
@@ -330,7 +364,7 @@ static int ath9k_htc_remove_monitor_interface(struct
ath9k_htc_priv *priv)
__ath9k_htc_remove_monitor_interface(priv);
- sta_idx = 0; /* Only single interface, for now */
+ sta_idx = priv->vif_sta_pos[priv->mon_vif_idx];
WMI_CMD_BUF(WMI_NODE_REMOVE_CMDID, &sta_idx);
if (ret) {
@@ -338,9 +372,14 @@ static int ath9k_htc_remove_monitor_interface(struct
ath9k_htc_priv *priv)
return ret;
}
+ priv->sta_slot &= ~(1 << sta_idx);
priv->nstations--;
priv->ah->is_monitoring = false;
+ ath_dbg(common, ATH_DBG_CONFIG,
+ "Removed a monitor interface at idx: %d, sta idx: %d\n",
+ priv->mon_vif_idx, sta_idx);
+
return 0;
}
@@ -352,12 +391,16 @@ static int ath9k_htc_add_station(struct ath9k_htc_priv
*priv,
struct ath9k_htc_target_sta tsta;
struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv;
struct ath9k_htc_sta *ista;
- int ret;
+ int ret, sta_idx;
u8 cmd_rsp;
if (priv->nstations >= ATH9K_HTC_MAX_STA)
return -ENOBUFS;
+ sta_idx = ffz(priv->sta_slot);
+ if ((sta_idx < 0) || (sta_idx > ATH9K_HTC_MAX_STA))
+ return -ENOBUFS;
+
memset(&tsta, 0, sizeof(struct ath9k_htc_target_sta));
if (sta) {
@@ -367,13 +410,13 @@ static int ath9k_htc_add_station(struct ath9k_htc_priv
*priv,
tsta.associd = common->curaid;
tsta.is_vif_sta = 0;
tsta.valid = true;
- ista->index = priv->nstations;
+ ista->index = sta_idx;
} else {
memcpy(&tsta.macaddr, vif->addr, ETH_ALEN);
tsta.is_vif_sta = 1;
}
- tsta.sta_index = priv->nstations;
+ tsta.sta_index = sta_idx;
tsta.vif_index = avp->index;
tsta.maxampdu = 0xffff;
if (sta && sta->ht_cap.ht_supported)
@@ -388,12 +431,21 @@ static int ath9k_htc_add_station(struct ath9k_htc_priv
*priv,
return ret;
}
- if (sta)
+ if (sta) {
ath_dbg(common, ATH_DBG_CONFIG,
"Added a station entry for: %pM (idx: %d)\n",
sta->addr, tsta.sta_index);
+ } else {
+ ath_dbg(common, ATH_DBG_CONFIG,
+ "Added a station entry for VIF %d (idx: %d)\n",
+ avp->index, tsta.sta_index);
+ }
+ priv->sta_slot |= (1 << sta_idx);
priv->nstations++;
+ if (!sta)
+ priv->vif_sta_pos[avp->index] = sta_idx;
+
return 0;
}
@@ -402,6 +454,7 @@ static int ath9k_htc_remove_station(struct ath9k_htc_priv
*priv,
struct ieee80211_sta *sta)
{
struct ath_common *common = ath9k_hw_common(priv->ah);
+ struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv;
struct ath9k_htc_sta *ista;
int ret;
u8 cmd_rsp, sta_idx;
@@ -410,7 +463,7 @@ static int ath9k_htc_remove_station(struct ath9k_htc_priv
*priv,
ista = (struct ath9k_htc_sta *) sta->drv_priv;
sta_idx = ista->index;
} else {
- sta_idx = 0;
+ sta_idx = priv->vif_sta_pos[avp->index];
}
WMI_CMD_BUF(WMI_NODE_REMOVE_CMDID, &sta_idx);
@@ -422,12 +475,19 @@ static int ath9k_htc_remove_station(struct ath9k_htc_priv
*priv,
return ret;
}
- if (sta)
+ if (sta) {
ath_dbg(common, ATH_DBG_CONFIG,
"Removed a station entry for: %pM (idx: %d)\n",
sta->addr, sta_idx);
+ } else {
+ ath_dbg(common, ATH_DBG_CONFIG,
+ "Removed a station entry for VIF %d (idx: %d)\n",
+ avp->index, sta_idx);
+ }
+ priv->sta_slot &= ~(1 << sta_idx);
priv->nstations--;
+
return 0;
}
@@ -1047,21 +1107,16 @@ static void ath9k_htc_stop(struct ieee80211_hw *hw)
WMI_CMD(WMI_STOP_RECV_CMDID);
skb_queue_purge(&priv->tx_queue);
- /* Remove monitor interface here */
- if (ah->opmode == NL80211_IFTYPE_MONITOR) {
- if (ath9k_htc_remove_monitor_interface(priv))
- ath_err(common, "Unable to remove monitor interface\n");
- else
- ath_dbg(common, ATH_DBG_CONFIG,
- "Monitor interface removed\n");
- }
-
if (ah->btcoex_hw.enabled) {
ath9k_hw_btcoex_disable(ah);
if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
ath_htc_cancel_btcoex_work(priv);
}
+ /* Remove a monitor interface if it's present. */
+ if (priv->ah->is_monitoring)
+ ath9k_htc_remove_monitor_interface(priv);
+
ath9k_hw_phy_disable(ah);
ath9k_hw_disable(ah);
ath9k_htc_ps_restore(priv);
@@ -1085,8 +1140,7 @@ static int ath9k_htc_add_interface(struct ieee80211_hw
*hw,
mutex_lock(&priv->mutex);
- /* Only one interface for now */
- if (priv->nvifs > 0) {
+ if (priv->nvifs >= ATH9K_HTC_MAX_VIF) {
ret = -ENOBUFS;
goto out;
}
@@ -1109,13 +1163,8 @@ static int ath9k_htc_add_interface(struct ieee80211_hw
*hw,
goto out;
}
- ath_dbg(common, ATH_DBG_CONFIG,
- "Attach a VIF of type: %d\n", vif->type);
-
- priv->ah->opmode = vif->type;
-
/* Index starts from zero on the target */
- avp->index = hvif.index = priv->nvifs;
+ avp->index = hvif.index = ffz(priv->vif_slot);
hvif.rtsthreshold = cpu_to_be16(2304);
WMI_CMD_BUF(WMI_VAP_CREATE_CMDID, &hvif);
if (ret)
@@ -1136,7 +1185,13 @@ static int ath9k_htc_add_interface(struct ieee80211_hw
*hw,
ath_dbg(common, ATH_DBG_CONFIG,
"Failed to update capability in target\n");
+ priv->ah->opmode = vif->type;
+ priv->vif_slot |= (1 << avp->index);
priv->vif = vif;
+
+ ath_dbg(common, ATH_DBG_CONFIG,
+ "Attach a VIF of type: %d at idx: %d\n", vif->type, avp->index);
+
out:
ath9k_htc_ps_restore(priv);
mutex_unlock(&priv->mutex);
@@ -1154,8 +1209,6 @@ static void ath9k_htc_remove_interface(struct
ieee80211_hw *hw,
int ret = 0;
u8 cmd_rsp;
- ath_dbg(common, ATH_DBG_CONFIG, "Detach Interface\n");
-
mutex_lock(&priv->mutex);
ath9k_htc_ps_wakeup(priv);
@@ -1164,10 +1217,13 @@ static void ath9k_htc_remove_interface(struct
ieee80211_hw *hw,
hvif.index = avp->index;
WMI_CMD_BUF(WMI_VAP_REMOVE_CMDID, &hvif);
priv->nvifs--;
+ priv->vif_slot &= ~(1 << avp->index);
ath9k_htc_remove_station(priv, vif, NULL);
priv->vif = NULL;
+ ath_dbg(common, ATH_DBG_CONFIG, "Detach Interface at idx: %d\n",
avp->index);
+
ath9k_htc_ps_restore(priv);
mutex_unlock(&priv->mutex);
}
@@ -1203,13 +1259,11 @@ static int ath9k_htc_config(struct ieee80211_hw *hw,
u32 changed)
* IEEE80211_CONF_CHANGE_CHANNEL is handled.
*/
if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
- if (conf->flags & IEEE80211_CONF_MONITOR) {
- if (ath9k_htc_add_monitor_interface(priv))
- ath_err(common, "Failed to set monitor mode\n");
- else
- ath_dbg(common, ATH_DBG_CONFIG,
- "HW opmode set to Monitor mode\n");
- }
+ if ((conf->flags & IEEE80211_CONF_MONITOR) &&
+ !priv->ah->is_monitoring)
+ ath9k_htc_add_monitor_interface(priv);
+ else if (priv->ah->is_monitoring)
+ ath9k_htc_remove_monitor_interface(priv);
}
if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c
b/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c
index 7a5ffca..d5f0f41 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c
@@ -84,7 +84,9 @@ int ath9k_htc_tx_start(struct ath9k_htc_priv *priv, struct
sk_buff *skb)
struct ieee80211_hdr *hdr;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
struct ieee80211_sta *sta = tx_info->control.sta;
+ struct ieee80211_vif *vif = tx_info->control.vif;
struct ath9k_htc_sta *ista;
+ struct ath9k_htc_vif *avp;
struct ath9k_htc_tx_ctl tx_ctl;
enum htc_endpoint_id epid;
u16 qnum;
@@ -95,18 +97,31 @@ int ath9k_htc_tx_start(struct ath9k_htc_priv *priv, struct
sk_buff *skb)
hdr = (struct ieee80211_hdr *) skb->data;
fc = hdr->frame_control;
- if (tx_info->control.vif &&
- (struct ath9k_htc_vif *) tx_info->control.vif->drv_priv)
- vif_idx = ((struct ath9k_htc_vif *)
- tx_info->control.vif->drv_priv)->index;
- else
- vif_idx = priv->nvifs;
+ /*
+ * Find out on which interface this packet has to be
+ * sent out.
+ */
+ if (vif) {
+ avp = (struct ath9k_htc_vif *) vif->drv_priv;
+ vif_idx = avp->index;
+ } else {
+ if (!priv->ah->is_monitoring) {
+ ath_dbg(ath9k_hw_common(priv->ah), ATH_DBG_XMIT,
+ "VIF is null, but no monitor interface !\n");
+ return -EINVAL;
+ }
+ vif_idx = priv->mon_vif_idx;
+ }
+
+ /*
+ * Find out which station this packet is destined for.
+ */
if (sta) {
ista = (struct ath9k_htc_sta *) sta->drv_priv;
sta_idx = ista->index;
} else {
- sta_idx = 0;
+ sta_idx = priv->vif_sta_pos[vif_idx];
}
memset(&tx_ctl, 0, sizeof(struct ath9k_htc_tx_ctl));
--
1.7.3.5
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