I have different HW. How can trigger sta_rc_update?
Am 31.01.2014 14:37, schrieb Stanislaw Gruszka:
> mac80211 ->sta_rc_update() callback must be atomic. Since we have to
> take mutex and do other operations that can sleep when sending fimrware
> commands to device, the only option to satisfy atomicity requirement of
> ->sta_rc_update(), that I can see, is introduce work_struct and defer
> uploading new rates to that work.
>
> I don't have h/w to test this patch. Since sta_rc_update() calls are
> very unlikely, those who would like to test that patch should remove
> my previous patch "ath9k_htc: make ->sta_rc_update atomic for most
> calls" and possibly even modify mac80211 to call sta_rc_update(),
> without actual reason, just to test changed ath9k_htc code.
>
> Thanks
> Stanislaw
> ---
> drivers/net/wireless/ath/ath9k/htc.h | 2 +
> drivers/net/wireless/ath/ath9k/htc_drv_main.c | 60
> +++++++++++++++++----------
> 2 files changed, 40 insertions(+), 22 deletions(-)
>
> diff --git a/drivers/net/wireless/ath/ath9k/htc.h
> b/drivers/net/wireless/ath/ath9k/htc.h
> index 58da346..99a2031 100644
> --- a/drivers/net/wireless/ath/ath9k/htc.h
> +++ b/drivers/net/wireless/ath/ath9k/htc.h
> @@ -262,6 +262,8 @@ enum tid_aggr_state {
> struct ath9k_htc_sta {
> u8 index;
> enum tid_aggr_state tid_state[ATH9K_HTC_MAX_TID];
> + struct work_struct rc_update_work;
> + struct ath9k_htc_priv *htc_priv;
> };
>
> #define ATH9K_HTC_RXBUF 256
> diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_main.c
> b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
> index a57af9b..c9254a6 100644
> --- a/drivers/net/wireless/ath/ath9k/htc_drv_main.c
> +++ b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
> @@ -1270,18 +1270,50 @@ static void ath9k_htc_configure_filter(struct
> ieee80211_hw *hw,
> mutex_unlock(&priv->mutex);
> }
>
> +static void ath9k_htc_sta_rc_update_work(struct work_struct *work)
> +{
> + struct ath9k_htc_sta *ista =
> + container_of(work, struct ath9k_htc_sta, rc_update_work);
> + struct ieee80211_sta *sta =
> + container_of((void *)ista, struct ieee80211_sta, drv_priv);
> + struct ath9k_htc_priv *priv = ista->htc_priv;
> + struct ath_common *common = ath9k_hw_common(priv->ah);
> + struct ath9k_htc_target_rate trate;
> +
> + mutex_lock(&priv->mutex);
> + ath9k_htc_ps_wakeup(priv);
> +
> + memset(&trate, 0, sizeof(struct ath9k_htc_target_rate));
> + ath9k_htc_setup_rate(priv, sta, &trate);
> + if (!ath9k_htc_send_rate_cmd(priv, &trate))
> + ath_dbg(common, CONFIG,
> + "Supported rates for sta: %pM updated, rate caps:
> 0x%X\n",
> + sta->addr, be32_to_cpu(trate.capflags));
> + else
> + ath_dbg(common, CONFIG,
> + "Unable to update supported rates for sta: %pM\n",
> + sta->addr);
> +
> + ath9k_htc_ps_restore(priv);
> + mutex_unlock(&priv->mutex);
> +}
> +
> static int ath9k_htc_sta_add(struct ieee80211_hw *hw,
> struct ieee80211_vif *vif,
> struct ieee80211_sta *sta)
> {
> struct ath9k_htc_priv *priv = hw->priv;
> + struct ath9k_htc_sta *ista = (struct ath9k_htc_sta *) sta->drv_priv;
> int ret;
>
> mutex_lock(&priv->mutex);
> ath9k_htc_ps_wakeup(priv);
> ret = ath9k_htc_add_station(priv, vif, sta);
> - if (!ret)
> + if (!ret) {
> + INIT_WORK(&ista->rc_update_work, ath9k_htc_sta_rc_update_work);
> + ista->htc_priv = priv;
> ath9k_htc_init_rate(priv, sta);
> + }
> ath9k_htc_ps_restore(priv);
> mutex_unlock(&priv->mutex);
>
> @@ -1293,12 +1325,13 @@ static int ath9k_htc_sta_remove(struct ieee80211_hw
> *hw,
> struct ieee80211_sta *sta)
> {
> struct ath9k_htc_priv *priv = hw->priv;
> - struct ath9k_htc_sta *ista;
> + struct ath9k_htc_sta *ista = (struct ath9k_htc_sta *) sta->drv_priv;
> int ret;
>
> + cancel_work_sync(&ista->rc_update_work);
> +
> mutex_lock(&priv->mutex);
> ath9k_htc_ps_wakeup(priv);
> - ista = (struct ath9k_htc_sta *) sta->drv_priv;
> htc_sta_drain(priv->htc, ista->index);
> ret = ath9k_htc_remove_station(priv, vif, sta);
> ath9k_htc_ps_restore(priv);
> @@ -1311,29 +1344,12 @@ static void ath9k_htc_sta_rc_update(struct
> ieee80211_hw *hw,
> struct ieee80211_vif *vif,
> struct ieee80211_sta *sta, u32 changed)
> {
> - struct ath9k_htc_priv *priv = hw->priv;
> - struct ath_common *common = ath9k_hw_common(priv->ah);
> - struct ath9k_htc_target_rate trate;
> + struct ath9k_htc_sta *ista = (struct ath9k_htc_sta *) sta->drv_priv;
>
> if (!(changed & IEEE80211_RC_SUPP_RATES_CHANGED))
> return;
>
> - mutex_lock(&priv->mutex);
> - ath9k_htc_ps_wakeup(priv);
> -
> - memset(&trate, 0, sizeof(struct ath9k_htc_target_rate));
> - ath9k_htc_setup_rate(priv, sta, &trate);
> - if (!ath9k_htc_send_rate_cmd(priv, &trate))
> - ath_dbg(common, CONFIG,
> - "Supported rates for sta: %pM updated, rate caps:
> 0x%X\n",
> - sta->addr, be32_to_cpu(trate.capflags));
> - else
> - ath_dbg(common, CONFIG,
> - "Unable to update supported rates for sta: %pM\n",
> - sta->addr);
> -
> - ath9k_htc_ps_restore(priv);
> - mutex_unlock(&priv->mutex);
> + schedule_work(&ista->rc_update_work);
> }
>
> static int ath9k_htc_conf_tx(struct ieee80211_hw *hw,
>
--
Regards,
Oleksij
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