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ath10k: improve beacon submission latency

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The patch prevents beacon misses in some case of
heavy load on a system.

If a beacon can't be transmitted directly from an
SWBA event it will be left in arvif->beacon and
transmission will be retried once TX credits
become available.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Michal Kazior 2013-09-13 14:16:56 +02:00 committed by Kalle Valo
parent 12acbc43c1
commit ed54388a38
4 changed files with 71 additions and 14 deletions
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1
drivers/net/wireless/ath/ath10k/core.h
View file

@ -204,6 +204,7 @@ struct ath10k_vif {
enum wmi_vdev_subtype vdev_subtype;
u32 beacon_interval;
u32 dtim_period;
struct sk_buff *beacon;
struct ath10k *ar;
struct ieee80211_vif *vif;

7
drivers/net/wireless/ath/ath10k/mac.c
View file

@ -2075,6 +2075,13 @@ static void ath10k_remove_interface(struct ieee80211_hw *hw,
mutex_lock(&ar->conf_mutex);
spin_lock_bh(&ar->data_lock);
if (arvif->beacon) {
dev_kfree_skb_any(arvif->beacon);
arvif->beacon = NULL;
}
spin_unlock_bh(&ar->data_lock);
ar->free_vdev_map |= 1 << (arvif->vdev_id);
if (arvif->vdev_type == WMI_VDEV_TYPE_AP) {

74
drivers/net/wireless/ath/ath10k/wmi.c
View file

@ -120,8 +120,53 @@ static int ath10k_wmi_cmd_send_nowait(struct ath10k *ar, struct sk_buff *skb,
return ret;
}
static void ath10k_wmi_tx_beacon_nowait(struct ath10k_vif *arvif)
{
struct wmi_bcn_tx_arg arg = {0};
int ret;
lockdep_assert_held(&arvif->ar->data_lock);
if (arvif->beacon == NULL)
return;
arg.vdev_id = arvif->vdev_id;
arg.tx_rate = 0;
arg.tx_power = 0;
arg.bcn = arvif->beacon->data;
arg.bcn_len = arvif->beacon->len;
ret = ath10k_wmi_beacon_send_nowait(arvif->ar, &arg);
if (ret)
return;
dev_kfree_skb_any(arvif->beacon);
arvif->beacon = NULL;
}
static void ath10k_wmi_tx_beacons_iter(void *data, u8 *mac,
struct ieee80211_vif *vif)
{
struct ath10k_vif *arvif = ath10k_vif_to_arvif(vif);
ath10k_wmi_tx_beacon_nowait(arvif);
}
static void ath10k_wmi_tx_beacons_nowait(struct ath10k *ar)
{
spin_lock_bh(&ar->data_lock);
ieee80211_iterate_active_interfaces_atomic(ar->hw,
IEEE80211_IFACE_ITER_NORMAL,
ath10k_wmi_tx_beacons_iter,
NULL);
spin_unlock_bh(&ar->data_lock);
}
static void ath10k_wmi_op_ep_tx_credits(struct ath10k *ar)
{
/* try to send pending beacons first. they take priority */
ath10k_wmi_tx_beacons_nowait(ar);
wake_up(&ar->wmi.tx_credits_wq);
}
@ -131,6 +176,9 @@ static int ath10k_wmi_cmd_send(struct ath10k *ar, struct sk_buff *skb,
int ret = -EINVAL;
wait_event_timeout(ar->wmi.tx_credits_wq, ({
/* try to send pending beacons first. they take priority */
ath10k_wmi_tx_beacons_nowait(ar);
ret = ath10k_wmi_cmd_send_nowait(ar, skb, cmd_id);
(ret != -EAGAIN);
}), 3*HZ);
@ -760,10 +808,8 @@ static void ath10k_wmi_event_host_swba(struct ath10k *ar, struct sk_buff *skb)
int i = -1;
struct wmi_bcn_info *bcn_info;
struct ath10k_vif *arvif;
struct wmi_bcn_tx_arg arg;
struct sk_buff *bcn;
int vdev_id = 0;
int ret;
ath10k_dbg(ATH10K_DBG_MGMT, "WMI_HOST_SWBA_EVENTID\n");
@ -820,17 +866,17 @@ static void ath10k_wmi_event_host_swba(struct ath10k *ar, struct sk_buff *skb)
ath10k_wmi_update_tim(ar, arvif, bcn, bcn_info);
ath10k_wmi_update_noa(ar, arvif, bcn, bcn_info);
arg.vdev_id = arvif->vdev_id;
arg.tx_rate = 0;
arg.tx_power = 0;
arg.bcn = bcn->data;
arg.bcn_len = bcn->len;
spin_lock_bh(&ar->data_lock);
if (arvif->beacon) {
ath10k_warn("SWBA overrun on vdev %d\n",
arvif->vdev_id);
dev_kfree_skb_any(arvif->beacon);
}
ret = ath10k_wmi_beacon_send(ar, &arg);
if (ret)
ath10k_warn("could not send beacon (%d)\n", ret);
arvif->beacon = bcn;
dev_kfree_skb_any(bcn);
ath10k_wmi_tx_beacon_nowait(arvif);
spin_unlock_bh(&ar->data_lock);
}
}
@ -1181,6 +1227,7 @@ static void ath10k_wmi_process_rx(struct ath10k *ar, struct sk_buff *skb)
* thus can't be defered to a worker thread */
switch (event_id) {
case WMI_MGMT_RX_EVENTID:
case WMI_HOST_SWBA_EVENTID:
ath10k_wmi_event_process(ar, skb);
return;
default:
@ -2138,7 +2185,8 @@ int ath10k_wmi_peer_assoc(struct ath10k *ar,
return ath10k_wmi_cmd_send(ar, skb, WMI_PEER_ASSOC_CMDID);
}
int ath10k_wmi_beacon_send(struct ath10k *ar, const struct wmi_bcn_tx_arg *arg)
int ath10k_wmi_beacon_send_nowait(struct ath10k *ar,
const struct wmi_bcn_tx_arg *arg)
{
struct wmi_bcn_tx_cmd *cmd;
struct sk_buff *skb;
@ -2154,7 +2202,7 @@ int ath10k_wmi_beacon_send(struct ath10k *ar, const struct wmi_bcn_tx_arg *arg)
cmd->hdr.bcn_len = __cpu_to_le32(arg->bcn_len);
memcpy(cmd->bcn, arg->bcn, arg->bcn_len);
return ath10k_wmi_cmd_send(ar, skb, WMI_BCN_TX_CMDID);
return ath10k_wmi_cmd_send_nowait(ar, skb, WMI_BCN_TX_CMDID);
}
static void ath10k_wmi_pdev_set_wmm_param(struct wmi_wmm_params *params,

3
drivers/net/wireless/ath/ath10k/wmi.h
View file

@ -3110,7 +3110,8 @@ int ath10k_wmi_set_ap_ps_param(struct ath10k *ar, u32 vdev_id, const u8 *mac,
enum wmi_ap_ps_peer_param param_id, u32 value);
int ath10k_wmi_scan_chan_list(struct ath10k *ar,
const struct wmi_scan_chan_list_arg *arg);
int ath10k_wmi_beacon_send(struct ath10k *ar, const struct wmi_bcn_tx_arg *arg);
int ath10k_wmi_beacon_send_nowait(struct ath10k *ar,
const struct wmi_bcn_tx_arg *arg);
int ath10k_wmi_pdev_set_wmm_params(struct ath10k *ar,
const struct wmi_pdev_set_wmm_params_arg *arg);
int ath10k_wmi_request_stats(struct ath10k *ar, enum wmi_stats_id stats_id);