cfg80211 API for channels/bitrates, mac80211 and driver conversion

This patch creates new cfg80211 wiphy API for channel and bitrate
registration and converts mac80211 and drivers to the new API. The
old mac80211 API is completely ripped out. All drivers (except ath5k)
are updated to the new API, in many cases I expect that optimisations
can be done.

Along with the regulatory code I've also ripped out the
IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED flag, I believe it to be
unnecessary if the hardware simply gives us whatever channels it wants
to support and we then enable/disable them as required, which is pretty
much required for travelling.

Additionally, the patch adds proper "basic" rate handling for STA
mode interface, AP mode interface will have to have new API added
to allow userspace to set the basic rate set, currently it'll be
empty... However, the basic rate handling will need to be moved to
the BSS conf stuff.

I do expect there to be bugs in this, especially wrt. transmit
power handling where I'm basically clueless about how it should work.

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

1 files changed, 40 insertions, 48 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-3945-rs.c b/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
index 80d31ae51e7..f018ce464d9 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
@@ -100,14 +100,6 @@ static struct iwl3945_tpt_entry iwl3945_tpt_table_a[] = {
 	{-89, IWL_RATE_6M_INDEX}
 };
 
-static struct iwl3945_tpt_entry iwl3945_tpt_table_b[] = {
-	{-86, IWL_RATE_11M_INDEX},
-	{-88, IWL_RATE_5M_INDEX},
-	{-90, IWL_RATE_2M_INDEX},
-	{-92, IWL_RATE_1M_INDEX}
-
-};
-
 static struct iwl3945_tpt_entry iwl3945_tpt_table_g[] = {
 	{-60, IWL_RATE_54M_INDEX},
 	{-64, IWL_RATE_48M_INDEX},
@@ -129,7 +121,7 @@ static struct iwl3945_tpt_entry iwl3945_tpt_table_g[] = {
 #define IWL_RATE_MIN_SUCCESS_TH       8
 #define IWL_RATE_DECREASE_TH       1920
 
-static u8 iwl3945_get_rate_index_by_rssi(s32 rssi, u8 mode)
+static u8 iwl3945_get_rate_index_by_rssi(s32 rssi, enum ieee80211_band band)
 {
 	u32 index = 0;
 	u32 table_size = 0;
@@ -138,21 +130,19 @@ static u8 iwl3945_get_rate_index_by_rssi(s32 rssi, u8 mode)
 	if ((rssi < IWL_MIN_RSSI_VAL) || (rssi > IWL_MAX_RSSI_VAL))
 		rssi = IWL_MIN_RSSI_VAL;
 
-	switch (mode) {
-	case MODE_IEEE80211G:
+	switch (band) {
+	case IEEE80211_BAND_2GHZ:
 		tpt_table = iwl3945_tpt_table_g;
 		table_size = ARRAY_SIZE(iwl3945_tpt_table_g);
 		break;
 
-	case MODE_IEEE80211A:
+	case IEEE80211_BAND_5GHZ:
 		tpt_table = iwl3945_tpt_table_a;
 		table_size = ARRAY_SIZE(iwl3945_tpt_table_a);
 		break;
 
 	default:
-	case MODE_IEEE80211B:
-		tpt_table = iwl3945_tpt_table_b;
-		table_size = ARRAY_SIZE(iwl3945_tpt_table_b);
+		BUG();
 		break;
 	}
 
@@ -340,17 +330,17 @@ static void rs_rate_init(void *priv_rate, void *priv_sta,
 	 * after assoc.. */
 
 	for (i = IWL_RATE_COUNT - 1; i >= 0; i--) {
-		if (sta->supp_rates & (1 << i)) {
-			sta->txrate = i;
+		if (sta->supp_rates[local->hw.conf.channel->band] & (1 << i)) {
+			sta->txrate_idx = i;
 			break;
 		}
 	}
 
-	sta->last_txrate = sta->txrate;
+	sta->last_txrate_idx = sta->txrate_idx;
 
-	/* For MODE_IEEE80211A mode it start at IWL_FIRST_OFDM_RATE */
-        if (local->hw.conf.phymode == MODE_IEEE80211A)
-                sta->last_txrate += IWL_FIRST_OFDM_RATE;
+	/* For 5 GHz band it start at IWL_FIRST_OFDM_RATE */
+	if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
+		sta->last_txrate_idx += IWL_FIRST_OFDM_RATE;
 
 	IWL_DEBUG_RATE("leave\n");
 }
@@ -429,17 +419,19 @@ static int rs_adjust_next_rate(struct iwl3945_priv *priv, int rate)
 {
 	int next_rate = iwl3945_get_prev_ieee_rate(rate);
 
-	switch (priv->phymode) {
-	case MODE_IEEE80211A:
+	switch (priv->band) {
+	case IEEE80211_BAND_5GHZ:
 		if (rate == IWL_RATE_12M_INDEX)
 			next_rate = IWL_RATE_9M_INDEX;
 		else if (rate == IWL_RATE_6M_INDEX)
 			next_rate = IWL_RATE_6M_INDEX;
 		break;
+/* XXX cannot be invoked in current mac80211 so not a regression
 	case MODE_IEEE80211B:
 		if (rate == IWL_RATE_11M_INDEX_TABLE)
 			next_rate = IWL_RATE_5M_INDEX_TABLE;
 		break;
+ */
 	default:
 		break;
 	}
@@ -465,15 +457,17 @@ static void rs_tx_status(void *priv_rate,
 	struct iwl3945_priv *priv = (struct iwl3945_priv *)priv_rate;
 	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 	struct iwl3945_rs_sta *rs_sta;
+	struct ieee80211_supported_band *sband;
+
+	sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 
 	IWL_DEBUG_RATE("enter\n");
 
 	retries = tx_resp->retry_count;
 
-	first_index = tx_resp->control.tx_rate;
+	first_index = &sband->bitrates[0] - tx_resp->control.tx_rate;
 	if ((first_index < 0) || (first_index >= IWL_RATE_COUNT)) {
-		IWL_DEBUG_RATE("leave: Rate out of bounds: %0x for %d\n",
-			       tx_resp->control.tx_rate, first_index);
+		IWL_DEBUG_RATE("leave: Rate out of bounds: %d\n", first_index);
 		return;
 	}
 
@@ -561,14 +555,14 @@ static void rs_tx_status(void *priv_rate,
 }
 
 static u16 iwl3945_get_adjacent_rate(struct iwl3945_rs_sta *rs_sta,
-				 u8 index, u16 rate_mask, int phymode)
+				 u8 index, u16 rate_mask, enum ieee80211_band band)
 {
 	u8 high = IWL_RATE_INVALID;
 	u8 low = IWL_RATE_INVALID;
 
 	/* 802.11A walks to the next literal adjacent rate in
 	 * the rate table */
-	if (unlikely(phymode == MODE_IEEE80211A)) {
+	if (unlikely(band == IEEE80211_BAND_5GHZ)) {
 		int i;
 		u32 mask;
 
@@ -639,7 +633,8 @@ static u16 iwl3945_get_adjacent_rate(struct iwl3945_rs_sta *rs_sta,
  *
  */
 static void rs_get_rate(void *priv_rate, struct net_device *dev,
-			struct ieee80211_hw_mode *mode, struct sk_buff *skb,
+			struct ieee80211_supported_band *band,
+			struct sk_buff *skb,
 			struct rate_selection *sel)
 {
 	u8 low = IWL_RATE_INVALID;
@@ -672,16 +667,16 @@ static void rs_get_rate(void *priv_rate, struct net_device *dev,
 	    is_multicast_ether_addr(hdr->addr1) ||
 	    !sta || !sta->rate_ctrl_priv) {
 		IWL_DEBUG_RATE("leave: No STA priv data to update!\n");
-		sel->rate = rate_lowest(local, local->oper_hw_mode, sta);
+		sel->rate = rate_lowest(local, band, sta);
 		if (sta)
 			sta_info_put(sta);
 		return;
 	}
 
-	rate_mask = sta->supp_rates;
-	index = min(sta->last_txrate & 0xffff, IWL_RATE_COUNT - 1);
+	rate_mask = sta->supp_rates[band->band];
+	index = min(sta->last_txrate_idx & 0xffff, IWL_RATE_COUNT - 1);
 
-	if (priv->phymode == (u8) MODE_IEEE80211A)
+	if (priv->band == IEEE80211_BAND_5GHZ)
 		rate_mask = rate_mask << IWL_FIRST_OFDM_RATE;
 
 	rs_sta = (void *)sta->rate_ctrl_priv;
@@ -732,7 +727,7 @@ static void rs_get_rate(void *priv_rate, struct net_device *dev,
 	current_tpt = window->average_tpt;
 
 	high_low = iwl3945_get_adjacent_rate(rs_sta, index, rate_mask,
-					 local->hw.conf.phymode);
+					     band->band);
 	low = high_low & 0xff;
 	high = (high_low >> 8) & 0xff;
 
@@ -810,11 +805,11 @@ static void rs_get_rate(void *priv_rate, struct net_device *dev,
 
  out:
 
-	sta->last_txrate = index;
-	if (priv->phymode == (u8) MODE_IEEE80211A)
-		sta->txrate = sta->last_txrate - IWL_FIRST_OFDM_RATE;
+	sta->last_txrate_idx = index;
+	if (priv->band == IEEE80211_BAND_5GHZ)
+		sta->txrate_idx = sta->last_txrate_idx - IWL_FIRST_OFDM_RATE;
 	else
-		sta->txrate = sta->last_txrate;
+		sta->txrate_idx = sta->last_txrate_idx;
 
 	sta_info_put(sta);
 
@@ -945,8 +940,9 @@ void iwl3945_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id)
 	spin_lock_irqsave(&rs_sta->lock, flags);
 
 	rs_sta->tgg = 0;
-	switch (priv->phymode) {
-	case MODE_IEEE80211G:
+	switch (priv->band) {
+	case IEEE80211_BAND_2GHZ:
+		/* TODO: this always does G, not a regression */
 		if (priv->active_rxon.flags & RXON_FLG_TGG_PROTECT_MSK) {
 			rs_sta->tgg = 1;
 			rs_sta->expected_tpt = iwl3945_expected_tpt_g_prot;
@@ -954,14 +950,11 @@ void iwl3945_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id)
 			rs_sta->expected_tpt = iwl3945_expected_tpt_g;
 		break;
 
-	case MODE_IEEE80211A:
+	case IEEE80211_BAND_5GHZ:
 		rs_sta->expected_tpt = iwl3945_expected_tpt_a;
 		break;
-
-	default:
-		IWL_WARNING("Invalid phymode.  Defaulting to 802.11b\n");
-	case MODE_IEEE80211B:
-		rs_sta->expected_tpt = iwl3945_expected_tpt_b;
+	case IEEE80211_NUM_BANDS:
+		BUG();
 		break;
 	}
 
@@ -974,8 +967,7 @@ void iwl3945_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id)
 
 	IWL_DEBUG(IWL_DL_INFO | IWL_DL_RATE, "Network RSSI: %d\n", rssi);
 
-	rs_sta->start_rate =
-			iwl3945_get_rate_index_by_rssi(rssi, priv->phymode);
+	rs_sta->start_rate = iwl3945_get_rate_index_by_rssi(rssi, priv->band);
 
 	IWL_DEBUG_RATE("leave: rssi %d assign rate index: "
 		       "%d (plcp 0x%x)\n", rssi, rs_sta->start_rate,