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ath9k_htc: Allow upto two simultaneous interfaces 

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.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Sujith Manoharan 2011-02-21 07:48:00 +05:30 committed by John W. Linville
parent 36bcce4306
commit a97b478c92
3 changed files with 130 additions and 54 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/net/wireless/ath/ath9k/htc.h
View File

@ -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;

148
drivers/net/wireless/ath/ath9k/htc_drv_main.c
View File

@ -227,6 +227,13 @@ static int ath9k_htc_set_channel(struct ath9k_htc_priv *priv,
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);
@ -236,9 +243,10 @@ 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)
@ -246,51 +254,69 @@ 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++;
/*
@ -301,15 +327,23 @@ 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;
}
@ -321,7 +355,7 @@ 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) {
@ -329,9 +363,14 @@ 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;
}
@ -343,12 +382,16 @@ 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) {
@ -358,13 +401,13 @@ 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)
@ -379,12 +422,21 @@ 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;
}
@ -393,6 +445,7 @@ 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;
@ -401,7 +454,7 @@ 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);
@ -413,12 +466,19 @@ 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;
}
@ -1049,21 +1109,16 @@ static void ath9k_htc_stop(struct ieee80211_hw *hw)
mutex_lock(&priv->mutex);
/* 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);
@ -1087,8 +1142,7 @@ 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;
}
@ -1111,13 +1165,8 @@ 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)
@ -1138,7 +1187,13 @@ 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);
@ -1156,8 +1211,6 @@ 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);
@ -1166,10 +1219,13 @@ 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);
}
@ -1205,13 +1261,11 @@ 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) {

29
drivers/net/wireless/ath/ath9k/htc_drv_txrx.c
View File

@ -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));