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ath9k_htc: Add beacon slots 

Beacon transmission is now handled through a slot mechanism.
This allows multiple beaconing interfaces to be be present.

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 2011-04-13 11:23:08 +05:30 committed by John W. Linville
parent 1c165c972b
commit 832f6a18fc
5 changed files with 138 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/net/wireless/ath/ath9k/htc.h
View File

@ -244,6 +244,7 @@ struct ath9k_htc_vif {
u8 index;
u16 seq_no;
bool beacon_configured;
int bslot;
};
struct ath9k_vif_iter_data {
@ -351,10 +352,14 @@ struct ath_led {
int brightness;
};
#define BSTUCK_THRESHOLD 10
struct htc_beacon_config {
struct ieee80211_vif *bslot[ATH9K_HTC_MAX_BCN_VIF];
u16 beacon_interval;
u16 dtim_period;
u16 bmiss_timeout;
u32 bmiss_cnt;
};
struct ath_btcoex {
@ -414,7 +419,6 @@ struct ath9k_htc_priv {
u16 txpowlimit;
u16 nvifs;
u16 nstations;
u32 bmiss_cnt;
bool rearm_ani;
bool reconfig_beacon;
@ -425,7 +429,6 @@ struct ath9k_htc_priv {
bool tx_queues_stop;
spinlock_t tx_lock;
struct ieee80211_vif *vif;
struct htc_beacon_config cur_beacon_conf;
unsigned int rxfilter;
struct tasklet_struct swba_tasklet;
@ -473,11 +476,15 @@ static inline void ath_read_cachesize(struct ath_common *common, int *csz)
void ath9k_htc_reset(struct ath9k_htc_priv *priv);
void ath9k_htc_assign_bslot(struct ath9k_htc_priv *priv,
struct ieee80211_vif *vif);
void ath9k_htc_remove_bslot(struct ath9k_htc_priv *priv,
struct ieee80211_vif *vif);
void ath9k_htc_beaconq_config(struct ath9k_htc_priv *priv);
void ath9k_htc_beacon_config(struct ath9k_htc_priv *priv,
struct ieee80211_vif *vif);
void ath9k_htc_beacon_reconfig(struct ath9k_htc_priv *priv);
void ath9k_htc_swba(struct ath9k_htc_priv *priv, u8 beacon_pending);
void ath9k_htc_swba(struct ath9k_htc_priv *priv);
void ath9k_htc_rxep(void *priv, struct sk_buff *skb,
enum htc_endpoint_id ep_id);

123
drivers/net/wireless/ath/ath9k/htc_drv_beacon.c
View File

@ -172,12 +172,13 @@ static void ath9k_htc_beacon_config_ap(struct ath9k_htc_priv *priv,
imask |= ATH9K_INT_SWBA;
ath_dbg(common, ATH_DBG_CONFIG,
"AP Beacon config, intval: %d, nexttbtt: %u imask: 0x%x\n",
"AP Beacon config, intval: %d, nexttbtt: %u "
"imask: 0x%x\n",
bss_conf->beacon_interval, nexttbtt, imask);
WMI_CMD(WMI_DISABLE_INTR_CMDID);
ath9k_hw_beaconinit(priv->ah, TU_TO_USEC(nexttbtt), TU_TO_USEC(intval));
priv->bmiss_cnt = 0;
priv->cur_beacon_conf.bmiss_cnt = 0;
htc_imask = cpu_to_be32(imask);
WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
}
@ -214,7 +215,7 @@ static void ath9k_htc_beacon_config_adhoc(struct ath9k_htc_priv *priv,
WMI_CMD(WMI_DISABLE_INTR_CMDID);
ath9k_hw_beaconinit(priv->ah, TU_TO_USEC(nexttbtt), TU_TO_USEC(intval));
priv->bmiss_cnt = 0;
priv->cur_beacon_conf.bmiss_cnt = 0;
htc_imask = cpu_to_be32(imask);
WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
}
@ -225,9 +226,11 @@ void ath9k_htc_beaconep(void *drv_priv, struct sk_buff *skb,
dev_kfree_skb_any(skb);
}
void ath9k_htc_swba(struct ath9k_htc_priv *priv, u8 beacon_pending)
static void ath9k_htc_send_beacon(struct ath9k_htc_priv *priv,
int slot)
{
struct ath9k_htc_vif *avp = (void *)priv->vif->drv_priv;
struct ieee80211_vif *vif;
struct ath9k_htc_vif *avp;
struct tx_beacon_header beacon_hdr;
struct ath9k_htc_tx_ctl tx_ctl;
struct ieee80211_tx_info *info;
@ -237,21 +240,18 @@ void ath9k_htc_swba(struct ath9k_htc_priv *priv, u8 beacon_pending)
memset(&beacon_hdr, 0, sizeof(struct tx_beacon_header));
memset(&tx_ctl, 0, sizeof(struct ath9k_htc_tx_ctl));
/* FIXME: Handle BMISS */
if (beacon_pending != 0) {
priv->bmiss_cnt++;
return;
}
spin_lock_bh(&priv->beacon_lock);
vif = priv->cur_beacon_conf.bslot[slot];
avp = (struct ath9k_htc_vif *)vif->drv_priv;
if (unlikely(priv->op_flags & OP_SCANNING)) {
spin_unlock_bh(&priv->beacon_lock);
return;
}
/* Get a new beacon */
beacon = ieee80211_beacon_get(priv->hw, priv->vif);
beacon = ieee80211_beacon_get(priv->hw, vif);
if (!beacon) {
spin_unlock_bh(&priv->beacon_lock);
return;
@ -276,6 +276,69 @@ void ath9k_htc_swba(struct ath9k_htc_priv *priv, u8 beacon_pending)
spin_unlock_bh(&priv->beacon_lock);
}
static int ath9k_htc_choose_bslot(struct ath9k_htc_priv *priv)
{
struct ath_common *common = ath9k_hw_common(priv->ah);
unsigned long flags;
u64 tsf;
u32 tsftu;
u16 intval;
int slot;
intval = priv->cur_beacon_conf.beacon_interval & ATH9K_BEACON_PERIOD;
spin_lock_irqsave(&priv->wmi->wmi_lock, flags);
tsf = priv->wmi->tsf;
spin_unlock_irqrestore(&priv->wmi->wmi_lock, flags);
tsftu = TSF_TO_TU(tsf >> 32, tsf);
slot = ((tsftu % intval) * ATH9K_HTC_MAX_BCN_VIF) / intval;
slot = ATH9K_HTC_MAX_BCN_VIF - slot - 1;
ath_dbg(common, ATH_DBG_BEACON,
"Choose slot: %d, tsf: %llu, tsftu: %u, intval: %u\n",
slot, tsf, tsftu, intval);
return slot;
}
void ath9k_htc_swba(struct ath9k_htc_priv *priv)
{
struct ath_common *common = ath9k_hw_common(priv->ah);
unsigned long flags;
int slot;
spin_lock_irqsave(&priv->wmi->wmi_lock, flags);
if (priv->wmi->beacon_pending != 0) {
spin_unlock_irqrestore(&priv->wmi->wmi_lock, flags);
priv->cur_beacon_conf.bmiss_cnt++;
if (priv->cur_beacon_conf.bmiss_cnt > BSTUCK_THRESHOLD) {
ath_dbg(common, ATH_DBG_BEACON,
"Beacon stuck, HW reset\n");
ath9k_htc_reset(priv);
}
return;
}
spin_unlock_irqrestore(&priv->wmi->wmi_lock, flags);
if (priv->cur_beacon_conf.bmiss_cnt) {
ath_dbg(common, ATH_DBG_BEACON,
"Resuming beacon xmit after %u misses\n",
priv->cur_beacon_conf.bmiss_cnt);
priv->cur_beacon_conf.bmiss_cnt = 0;
}
slot = ath9k_htc_choose_bslot(priv);
spin_lock_bh(&priv->beacon_lock);
if (priv->cur_beacon_conf.bslot[slot] == NULL) {
spin_unlock_bh(&priv->beacon_lock);
return;
}
spin_unlock_bh(&priv->beacon_lock);
ath9k_htc_send_beacon(priv, slot);
}
/* Currently, only for IBSS */
void ath9k_htc_beaconq_config(struct ath9k_htc_priv *priv)
{
@ -307,6 +370,42 @@ void ath9k_htc_beaconq_config(struct ath9k_htc_priv *priv)
}
}
void ath9k_htc_assign_bslot(struct ath9k_htc_priv *priv,
struct ieee80211_vif *vif)
{
struct ath_common *common = ath9k_hw_common(priv->ah);
struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
int i = 0;
spin_lock_bh(&priv->beacon_lock);
for (i = 0; i < ATH9K_HTC_MAX_BCN_VIF; i++) {
if (priv->cur_beacon_conf.bslot[i] == NULL) {
avp->bslot = i;
break;
}
}
priv->cur_beacon_conf.bslot[avp->bslot] = vif;
spin_unlock_bh(&priv->beacon_lock);
ath_dbg(common, ATH_DBG_CONFIG,
"Added interface at beacon slot: %d\n", avp->bslot);
}
void ath9k_htc_remove_bslot(struct ath9k_htc_priv *priv,
struct ieee80211_vif *vif)
{
struct ath_common *common = ath9k_hw_common(priv->ah);
struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv;
spin_lock_bh(&priv->beacon_lock);
priv->cur_beacon_conf.bslot[avp->bslot] = NULL;
spin_unlock_bh(&priv->beacon_lock);
ath_dbg(common, ATH_DBG_CONFIG,
"Removed interface at beacon slot: %d\n", avp->bslot);
}
static void ath9k_htc_beacon_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
{
bool *beacon_configured = (bool *)data;

5
drivers/net/wireless/ath/ath9k/htc_drv_init.c
View File

@ -643,7 +643,7 @@ static int ath9k_init_priv(struct ath9k_htc_priv *priv,
{
struct ath_hw *ah = NULL;
struct ath_common *common;
int ret = 0, csz = 0;
int i, ret = 0, csz = 0;
priv->op_flags |= OP_INVALID;
@ -711,6 +711,9 @@ static int ath9k_init_priv(struct ath9k_htc_priv *priv,
if (ret)
goto err_queues;
for (i = 0; i < ATH9K_HTC_MAX_BCN_VIF; i++)
priv->cur_beacon_conf.bslot[i] = NULL;
ath9k_init_crypto(priv);
ath9k_init_channels_rates(priv);
ath9k_init_misc(priv);

12
drivers/net/wireless/ath/ath9k/htc_drv_main.c
View File

@ -1281,9 +1281,13 @@ static int ath9k_htc_add_interface(struct ieee80211_hw *hw,
priv->vif_slot |= (1 << avp->index);
priv->nvifs++;
priv->vif = vif;
INC_VIF(priv, vif->type);
if ((vif->type == NL80211_IFTYPE_AP) ||
(vif->type == NL80211_IFTYPE_ADHOC))
ath9k_htc_assign_bslot(priv, vif);
ath9k_htc_set_opmode(priv);
if ((priv->ah->opmode == NL80211_IFTYPE_AP) &&
@ -1321,9 +1325,13 @@ static void ath9k_htc_remove_interface(struct ieee80211_hw *hw,
priv->vif_slot &= ~(1 << avp->index);
ath9k_htc_remove_station(priv, vif, NULL);
priv->vif = NULL;
DEC_VIF(priv, vif->type);
if ((vif->type == NL80211_IFTYPE_AP) ||
(vif->type == NL80211_IFTYPE_ADHOC))
ath9k_htc_remove_bslot(priv, vif);
ath9k_htc_set_opmode(priv);
/*

4
drivers/net/wireless/ath/ath9k/wmi.c
View File

@ -126,7 +126,7 @@ void ath9k_swba_tasklet(unsigned long data)
{
struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data;
ath9k_htc_swba(priv, priv->wmi->beacon_pending);
ath9k_htc_swba(priv);
}
void ath9k_fatal_work(struct work_struct *work)
@ -173,8 +173,10 @@ static void ath9k_wmi_ctrl_rx(void *priv, struct sk_buff *skb,
case WMI_SWBA_EVENTID:
swba = (struct wmi_event_swba *) wmi_event;
spin_lock(&wmi->wmi_lock);
wmi->tsf = be64_to_cpu(swba->tsf);
wmi->beacon_pending = swba->beacon_pending;
spin_unlock(&wmi->wmi_lock);
tasklet_schedule(&wmi->drv_priv->swba_tasklet);
break;