mac80211: make retry limits part of hw config

Instead of having a separate callback, use the HW config callback
with a new flag to change retry limits.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath9k/main.c

@@ -1659,7 +1659,6 @@ static struct ieee80211_ops ath9k_ops = {
 	.get_tkip_seq       = NULL,
 	.set_rts_threshold  = NULL,
 	.set_frag_threshold = NULL,
-	.set_retry_limit    = NULL,
 	.get_tsf 	    = ath9k_get_tsf,
 	.reset_tsf 	    = ath9k_reset_tsf,
 	.tx_last_beacon     = NULL,

drivers/net/wireless/b43/main.c

@@ -3320,6 +3320,22 @@ init_failure:
 	return err;
 }
 
+/* Write the short and long frame retry limit values. */
+static void b43_set_retry_limits(struct b43_wldev *dev,
+				 unsigned int short_retry,
+				 unsigned int long_retry)
+{
+	/* The retry limit is a 4-bit counter. Enforce this to avoid overflowing
+	 * the chip-internal counter. */
+	short_retry = min(short_retry, (unsigned int)0xF);
+	long_retry = min(long_retry, (unsigned int)0xF);
+
+	b43_shm_write16(dev, B43_SHM_SCRATCH, B43_SHM_SC_SRLIMIT,
+			short_retry);
+	b43_shm_write16(dev, B43_SHM_SCRATCH, B43_SHM_SC_LRLIMIT,
+			long_retry);
+}
+
 static int b43_op_config(struct ieee80211_hw *hw, u32 changed)
 {
 	struct b43_wl *wl = hw_to_b43_wl(hw);
@@ -3340,6 +3356,13 @@ static int b43_op_config(struct ieee80211_hw *hw, u32 changed)
 	dev = wl->current_dev;
 	phy = &dev->phy;
 
+	if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS)
+		b43_set_retry_limits(dev, conf->short_frame_max_tx_count,
+					  conf->long_frame_max_tx_count);
+	changed &= ~IEEE80211_CONF_CHANGE_RETRY_LIMITS;
+	if (!changed)
+		goto out_unlock_mutex;
+
 	/* Disable IRQs while reconfiguring the device.
 	 * This makes it possible to drop the spinlock throughout
 	 * the reconfiguration process. */
@@ -3859,22 +3882,6 @@ static void b43_imcfglo_timeouts_workaround(struct b43_wldev *dev)
 #endif /* CONFIG_SSB_DRIVER_PCICORE */
 }
 
-/* Write the short and long frame retry limit values. */
-static void b43_set_retry_limits(struct b43_wldev *dev,
-				 unsigned int short_retry,
-				 unsigned int long_retry)
-{
-	/* The retry limit is a 4-bit counter. Enforce this to avoid overflowing
-	 * the chip-internal counter. */
-	short_retry = min(short_retry, (unsigned int)0xF);
-	long_retry = min(long_retry, (unsigned int)0xF);
-
-	b43_shm_write16(dev, B43_SHM_SCRATCH, B43_SHM_SC_SRLIMIT,
-			short_retry);
-	b43_shm_write16(dev, B43_SHM_SCRATCH, B43_SHM_SC_LRLIMIT,
-			long_retry);
-}
-
 static void b43_set_synth_pu_delay(struct b43_wldev *dev, bool idle)
 {
 	u16 pu_delay;
@@ -4195,26 +4202,6 @@ static void b43_op_stop(struct ieee80211_hw *hw)
 	cancel_work_sync(&(wl->txpower_adjust_work));
 }
 
-static int b43_op_set_retry_limit(struct ieee80211_hw *hw,
-				  u32 short_retry_limit, u32 long_retry_limit)
-{
-	struct b43_wl *wl = hw_to_b43_wl(hw);
-	struct b43_wldev *dev;
-	int err = 0;
-
-	mutex_lock(&wl->mutex);
-	dev = wl->current_dev;
-	if (unlikely(!dev || (b43_status(dev) < B43_STAT_INITIALIZED))) {
-		err = -ENODEV;
-		goto out_unlock;
-	}
-	b43_set_retry_limits(dev, short_retry_limit, long_retry_limit);
-out_unlock:
-	mutex_unlock(&wl->mutex);
-
-	return err;
-}
-
 static int b43_op_beacon_set_tim(struct ieee80211_hw *hw,
 				 struct ieee80211_sta *sta, bool set)
 {
@@ -4251,7 +4238,6 @@ static const struct ieee80211_ops b43_hw_ops = {
 	.get_tx_stats		= b43_op_get_tx_stats,
 	.start			= b43_op_start,
 	.stop			= b43_op_stop,
-	.set_retry_limit	= b43_op_set_retry_limit,
 	.set_tim		= b43_op_beacon_set_tim,
 	.sta_notify		= b43_op_sta_notify,
 };

drivers/net/wireless/b43legacy/main.c

@@ -2556,6 +2556,20 @@ init_failure:
 	return err;
 }
 
+/* Write the short and long frame retry limit values. */
+static void b43legacy_set_retry_limits(struct b43legacy_wldev *dev,
+				       unsigned int short_retry,
+				       unsigned int long_retry)
+{
+	/* The retry limit is a 4-bit counter. Enforce this to avoid overflowing
+	 * the chip-internal counter. */
+	short_retry = min(short_retry, (unsigned int)0xF);
+	long_retry = min(long_retry, (unsigned int)0xF);
+
+	b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, 0x0006, short_retry);
+	b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, 0x0007, long_retry);
+}
+
 static int b43legacy_op_dev_config(struct ieee80211_hw *hw,
 				   u32 changed)
 {
@@ -2577,6 +2591,14 @@ static int b43legacy_op_dev_config(struct ieee80211_hw *hw,
 	dev = wl->current_dev;
 	phy = &dev->phy;
 
+	if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS)
+		b43legacy_set_retry_limits(dev,
+					   conf->short_frame_max_tx_count,
+					   conf->long_frame_max_tx_count);
+	changed &= ~IEEE80211_CONF_CHANGE_RETRY_LIMITS;
+	if (!changed)
+		goto out_unlock_mutex;
+
 	/* Switch the PHY mode (if necessary). */
 	switch (conf->channel->band) {
 	case IEEE80211_BAND_2GHZ:
@@ -2989,20 +3011,6 @@ static void b43legacy_imcfglo_timeouts_workaround(struct b43legacy_wldev *dev)
 #endif /* CONFIG_SSB_DRIVER_PCICORE */
 }
 
-/* Write the short and long frame retry limit values. */
-static void b43legacy_set_retry_limits(struct b43legacy_wldev *dev,
-				       unsigned int short_retry,
-				       unsigned int long_retry)
-{
-	/* The retry limit is a 4-bit counter. Enforce this to avoid overflowing
-	 * the chip-internal counter. */
-	short_retry = min(short_retry, (unsigned int)0xF);
-	long_retry = min(long_retry, (unsigned int)0xF);
-
-	b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, 0x0006, short_retry);
-	b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, 0x0007, long_retry);
-}
-
 static void b43legacy_set_synth_pu_delay(struct b43legacy_wldev *dev,
 					  bool idle) {
 	u16 pu_delay = 1050;
@@ -3367,28 +3375,6 @@ static void b43legacy_op_stop(struct ieee80211_hw *hw)
 	mutex_unlock(&wl->mutex);
 }
 
-static int b43legacy_op_set_retry_limit(struct ieee80211_hw *hw,
-					u32 short_retry_limit,
-					u32 long_retry_limit)
-{
-	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
-	struct b43legacy_wldev *dev;
-	int err = 0;
-
-	mutex_lock(&wl->mutex);
-	dev = wl->current_dev;
-	if (unlikely(!dev ||
-		     (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED))) {
-		err = -ENODEV;
-		goto out_unlock;
-	}
-	b43legacy_set_retry_limits(dev, short_retry_limit, long_retry_limit);
-out_unlock:
-	mutex_unlock(&wl->mutex);
-
-	return err;
-}
-
 static int b43legacy_op_beacon_set_tim(struct ieee80211_hw *hw,
 				       struct ieee80211_sta *sta, bool set)
 {
@@ -3414,7 +3400,6 @@ static const struct ieee80211_ops b43legacy_hw_ops = {
 	.get_tx_stats		= b43legacy_op_get_tx_stats,
 	.start			= b43legacy_op_start,
 	.stop			= b43legacy_op_stop,
-	.set_retry_limit	= b43legacy_op_set_retry_limit,
 	.set_tim		= b43legacy_op_beacon_set_tim,
 };
 

drivers/net/wireless/rt2x00/rt2400pci.c

@@ -1574,7 +1574,6 @@ static const struct ieee80211_ops rt2400pci_mac80211_ops = {
 	.config_interface	= rt2x00mac_config_interface,
 	.configure_filter	= rt2x00mac_configure_filter,
 	.get_stats		= rt2x00mac_get_stats,
-	.set_retry_limit	= rt2400pci_set_retry_limit,
 	.bss_info_changed	= rt2x00mac_bss_info_changed,
 	.conf_tx		= rt2400pci_conf_tx,
 	.get_tx_stats		= rt2x00mac_get_tx_stats,
@@ -1603,6 +1602,7 @@ static const struct rt2x00lib_ops rt2400pci_rt2x00_ops = {
 	.config_intf		= rt2400pci_config_intf,
 	.config_erp		= rt2400pci_config_erp,
 	.config			= rt2400pci_config,
+	.set_retry_limit	= rt2400pci_set_retry_limit,
 };
 
 static const struct data_queue_desc rt2400pci_queue_rx = {

drivers/net/wireless/rt2x00/rt2500pci.c

@@ -1874,7 +1874,6 @@ static const struct ieee80211_ops rt2500pci_mac80211_ops = {
 	.config_interface	= rt2x00mac_config_interface,
 	.configure_filter	= rt2x00mac_configure_filter,
 	.get_stats		= rt2x00mac_get_stats,
-	.set_retry_limit	= rt2500pci_set_retry_limit,
 	.bss_info_changed	= rt2x00mac_bss_info_changed,
 	.conf_tx		= rt2x00mac_conf_tx,
 	.get_tx_stats		= rt2x00mac_get_tx_stats,
@@ -1903,6 +1902,7 @@ static const struct rt2x00lib_ops rt2500pci_rt2x00_ops = {
 	.config_intf		= rt2500pci_config_intf,
 	.config_erp		= rt2500pci_config_erp,
 	.config			= rt2500pci_config,
+	.set_retry_limit	= rt2500pci_set_retry_limit,
 };
 
 static const struct data_queue_desc rt2500pci_queue_rx = {

drivers/net/wireless/rt2x00/rt2x00.h

@@ -599,6 +599,9 @@ struct rt2x00lib_ops {
 #define CONFIG_UPDATE_SLOT_TIME 	( 1 << 5 )
 #define CONFIG_UPDATE_BEACON_INT	( 1 << 6 )
 #define CONFIG_UPDATE_ALL		0xffff
+
+	int (*set_retry_limit) (struct ieee80211_hw *hw,
+				u32 short_limit, u32 long_limit);
 };
 
 /*

drivers/net/wireless/rt2x00/rt2x00mac.c

@@ -349,6 +349,15 @@ int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed)
 	if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
 		return 0;
 
+	if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) {
+		rt2x00dev->ops->lib->set_retry_limit(hw,
+			conf->short_frame_max_tx_count,
+			conf->long_frame_max_tx_count);
+	}
+	changed &= ~IEEE80211_CONF_CHANGE_RETRY_LIMITS;
+	if (!changed)
+		return 0;
+
 	/*
 	 * Only change device state when the radio is enabled. It does not
 	 * matter what parameters we have configured when the radio is disabled

drivers/net/wireless/rt2x00/rt61pci.c

@@ -2724,7 +2724,6 @@ static const struct ieee80211_ops rt61pci_mac80211_ops = {
 	.configure_filter	= rt2x00mac_configure_filter,
 	.set_key		= rt2x00mac_set_key,
 	.get_stats		= rt2x00mac_get_stats,
-	.set_retry_limit	= rt61pci_set_retry_limit,
 	.bss_info_changed	= rt2x00mac_bss_info_changed,
 	.conf_tx		= rt61pci_conf_tx,
 	.get_tx_stats		= rt2x00mac_get_tx_stats,
@@ -2757,6 +2756,7 @@ static const struct rt2x00lib_ops rt61pci_rt2x00_ops = {
 	.config_intf		= rt61pci_config_intf,
 	.config_erp		= rt61pci_config_erp,
 	.config			= rt61pci_config,
+	.set_retry_limit	= rt61pci_set_retry_limit,
 };
 
 static const struct data_queue_desc rt61pci_queue_rx = {

drivers/net/wireless/rt2x00/rt73usb.c

@@ -2315,7 +2315,6 @@ static const struct ieee80211_ops rt73usb_mac80211_ops = {
 	.configure_filter	= rt2x00mac_configure_filter,
 	.set_key		= rt2x00mac_set_key,
 	.get_stats		= rt2x00mac_get_stats,
-	.set_retry_limit	= rt73usb_set_retry_limit,
 	.bss_info_changed	= rt2x00mac_bss_info_changed,
 	.conf_tx		= rt73usb_conf_tx,
 	.get_tx_stats		= rt2x00mac_get_tx_stats,
@@ -2347,6 +2346,7 @@ static const struct rt2x00lib_ops rt73usb_rt2x00_ops = {
 	.config_intf		= rt73usb_config_intf,
 	.config_erp		= rt73usb_config_erp,
 	.config			= rt73usb_config,
+	.set_retry_limit	= rt73usb_set_retry_limit,
 };
 
 static const struct data_queue_desc rt73usb_queue_rx = {

include/net/mac80211.h

@@ -473,6 +473,7 @@ static inline int __deprecated __IEEE80211_CONF_SHORT_SLOT_TIME(void)
  * @IEEE80211_CONF_CHANGE_PS: the PS flag changed
  * @IEEE80211_CONF_CHANGE_POWER: the TX power changed
  * @IEEE80211_CONF_CHANGE_CHANNEL: the channel changed
+ * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed
  */
 enum ieee80211_conf_changed {
 	IEEE80211_CONF_CHANGE_RADIO_ENABLED	= BIT(0),
@@ -482,6 +483,7 @@ enum ieee80211_conf_changed {
 	IEEE80211_CONF_CHANGE_PS		= BIT(4),
 	IEEE80211_CONF_CHANGE_POWER		= BIT(5),
 	IEEE80211_CONF_CHANGE_CHANNEL		= BIT(6),
+	IEEE80211_CONF_CHANGE_RETRY_LIMITS	= BIT(7),
 };
 
 /**
@@ -497,6 +499,12 @@ enum ieee80211_conf_changed {
  * @ht_cap: describes current self configuration of 802.11n HT capabilities
  * @ht_bss_conf: describes current BSS configuration of 802.11n HT parameters
  * @channel: the channel to tune to
+ * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame
+ *    (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11,
+ *    but actually means the number of transmissions not the number of retries
+ * @short_frame_max_tx_count: Maximum number of transmissions for a "short"
+ *    frame, called "dot11ShortRetryLimit" in 802.11, but actually means the
+ *    number of transmissions not the number of retries
  */
 struct ieee80211_conf {
 	int beacon_int;
@@ -506,6 +514,8 @@ struct ieee80211_conf {
 	u16 listen_interval;
 	bool radio_enabled;
 
+	u8 long_frame_max_tx_count, short_frame_max_tx_count;
+
 	struct ieee80211_channel *channel;
 
 	struct ieee80211_sta_ht_cap ht_cap;
@@ -1190,8 +1200,6 @@ enum ieee80211_ampdu_mlme_action {
  *	the device does fragmentation by itself; if this method is assigned then
  *	the stack will not do fragmentation.
  *
- * @set_retry_limit: Configuration of retry limits (if device needs it)
- *
  * @sta_notify: Notifies low level driver about addition or removal
  *	of assocaited station or AP.
  *
@@ -1261,8 +1269,6 @@ struct ieee80211_ops {
 			     u32 *iv32, u16 *iv16);
 	int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value);
 	int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value);
-	int (*set_retry_limit)(struct ieee80211_hw *hw,
-			       u32 short_retry, u32 long_retr);
 	void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 			enum sta_notify_cmd, struct ieee80211_sta *sta);
 	int (*conf_tx)(struct ieee80211_hw *hw, u16 queue,

net/mac80211/debugfs.c

@@ -52,9 +52,9 @@ DEBUGFS_READONLY_FILE(rts_threshold, 20, "%d",
 DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d",
 		      local->fragmentation_threshold);
 DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d",
-		      local->short_retry_limit);
+		      local->hw.conf.short_frame_max_tx_count);
 DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d",
-		      local->long_retry_limit);
+		      local->hw.conf.long_frame_max_tx_count);
 DEBUGFS_READONLY_FILE(total_ps_buffered, 20, "%d",
 		      local->total_ps_buffered);
 DEBUGFS_READONLY_FILE(wep_iv, 20, "%#06x",

net/mac80211/ieee80211_i.h

@@ -635,8 +635,6 @@ struct ieee80211_local {
 
 	int rts_threshold;
 	int fragmentation_threshold;
-	int short_retry_limit; /* dot11ShortRetryLimit */
-	int long_retry_limit; /* dot11LongRetryLimit */
 
 	struct crypto_blkcipher *wep_tx_tfm;
 	struct crypto_blkcipher *wep_rx_tfm;

net/mac80211/main.c

@@ -673,8 +673,8 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
 
 	local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 	local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
-	local->short_retry_limit = 7;
-	local->long_retry_limit = 4;
+	local->hw.conf.long_frame_max_tx_count = 4;
+	local->hw.conf.short_frame_max_tx_count = 7;
 	local->hw.conf.radio_enabled = true;
 
 	INIT_LIST_HEAD(&local->interfaces);

net/mac80211/tx.c

@@ -505,10 +505,10 @@ ieee80211_tx_h_misc(struct ieee80211_tx_data *tx)
 				info->flags |=
 					IEEE80211_TX_CTL_LONG_RETRY_LIMIT;
 				info->control.retry_limit =
-					tx->local->long_retry_limit;
+					tx->local->hw.conf.long_frame_max_tx_count - 1;
 			} else {
 				info->control.retry_limit =
-					tx->local->short_retry_limit;
+					tx->local->hw.conf.short_frame_max_tx_count - 1;
 			}
 		} else {
 			info->control.retry_limit = 1;

net/mac80211/wext.c

@@ -802,21 +802,16 @@ static int ieee80211_ioctl_siwretry(struct net_device *dev,
 	    (retry->flags & IW_RETRY_TYPE) != IW_RETRY_LIMIT)
 		return -EINVAL;
 
-	if (retry->flags & IW_RETRY_MAX)
-		local->long_retry_limit = retry->value;
-	else if (retry->flags & IW_RETRY_MIN)
-		local->short_retry_limit = retry->value;
-	else {
-		local->long_retry_limit = retry->value;
-		local->short_retry_limit = retry->value;
+	if (retry->flags & IW_RETRY_MAX) {
+		local->hw.conf.long_frame_max_tx_count = retry->value;
+	} else if (retry->flags & IW_RETRY_MIN) {
+		local->hw.conf.short_frame_max_tx_count = retry->value;
+	} else {
+		local->hw.conf.long_frame_max_tx_count = retry->value;
+		local->hw.conf.short_frame_max_tx_count = retry->value;
 	}
 
-	if (local->ops->set_retry_limit) {
-		return local->ops->set_retry_limit(
-			local_to_hw(local),
-			local->short_retry_limit,
-			local->long_retry_limit);
-	}
+	ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_RETRY_LIMITS);
 
 	return 0;
 }
@@ -833,14 +828,15 @@ static int ieee80211_ioctl_giwretry(struct net_device *dev,
 		/* first return min value, iwconfig will ask max value
 		 * later if needed */
 		retry->flags |= IW_RETRY_LIMIT;
-		retry->value = local->short_retry_limit;
-		if (local->long_retry_limit != local->short_retry_limit)
+		retry->value = local->hw.conf.short_frame_max_tx_count;
+		if (local->hw.conf.long_frame_max_tx_count !=
+		    local->hw.conf.short_frame_max_tx_count)
 			retry->flags |= IW_RETRY_MIN;
 		return 0;
 	}
 	if (retry->flags & IW_RETRY_MAX) {
 		retry->flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
-		retry->value = local->long_retry_limit;
+		retry->value = local->hw.conf.long_frame_max_tx_count;
 	}
 
 	return 0;