rtlwifi: rtl818x: Move drivers into new realtek directory

Now that a new mac80211-based driver for Realtek devices has been submitted,
it is time to reorganize the directories. Rather than having directories
rtlwifi and rtl818x be in drivers/net/wireless/, they will now be in
drivers/net/wireless/realtek/. This change simplifies the directory
structure, but does not result in any configuration changes that are
visable to the user.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 302 insertions, 0 deletions

diff --git a/drivers/net/wireless/realtek/rtlwifi/rc.c b/drivers/net/wireless/realtek/rtlwifi/rc.c
new file mode 100644
index 000000000000..74c14ce28238
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtlwifi/rc.c
@@ -0,0 +1,302 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2009-2012  Realtek Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ * Contact Information:
+ * wlanfae <wlanfae@realtek.com>
+ * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
+ * Hsinchu 300, Taiwan.
+ *
+ * Larry Finger <Larry.Finger@lwfinger.net>
+ *
+ *****************************************************************************/
+
+#include "wifi.h"
+#include "base.h"
+#include "rc.h"
+
+/*
+ *Finds the highest rate index we can use
+ *if skb is special data like DHCP/EAPOL, we set should
+ *it to lowest rate CCK_1M, otherwise we set rate to
+ *highest rate based on wireless mode used for iwconfig
+ *show Tx rate.
+ */
+static u8 _rtl_rc_get_highest_rix(struct rtl_priv *rtlpriv,
+				  struct ieee80211_sta *sta,
+				  struct sk_buff *skb, bool not_data)
+{
+	struct rtl_hal *rtlhal = rtl_hal(rtlpriv);
+	struct rtl_phy *rtlphy = &(rtlpriv->phy);
+	struct rtl_sta_info *sta_entry = NULL;
+	u8 wireless_mode = 0;
+
+	/*
+	 *this rate is no use for true rate, firmware
+	 *will control rate at all it just used for
+	 *1.show in iwconfig in B/G mode
+	 *2.in rtl_get_tcb_desc when we check rate is
+	 *      1M we will not use FW rate but user rate.
+	 */
+
+	if (sta) {
+		sta_entry = (struct rtl_sta_info *)sta->drv_priv;
+		wireless_mode = sta_entry->wireless_mode;
+	}
+
+	if (rtl_is_special_data(rtlpriv->mac80211.hw, skb, true, false) ||
+	    not_data) {
+		return 0;
+	} else {
+		if (rtlhal->current_bandtype == BAND_ON_2_4G) {
+			if (wireless_mode == WIRELESS_MODE_B) {
+				return B_MODE_MAX_RIX;
+			} else if (wireless_mode == WIRELESS_MODE_G) {
+				return G_MODE_MAX_RIX;
+			} else if (wireless_mode == WIRELESS_MODE_N_24G) {
+				if (get_rf_type(rtlphy) != RF_2T2R)
+					return N_MODE_MCS7_RIX;
+				else
+					return N_MODE_MCS15_RIX;
+			} else if (wireless_mode == WIRELESS_MODE_AC_24G) {
+				return AC_MODE_MCS9_RIX;
+			}
+			return 0;
+		} else {
+			if (wireless_mode == WIRELESS_MODE_A) {
+				return A_MODE_MAX_RIX;
+			} else if (wireless_mode == WIRELESS_MODE_N_5G) {
+				if (get_rf_type(rtlphy) != RF_2T2R)
+					return N_MODE_MCS7_RIX;
+				else
+					return N_MODE_MCS15_RIX;
+			} else if (wireless_mode == WIRELESS_MODE_AC_5G) {
+				return AC_MODE_MCS9_RIX;
+			}
+			return 0;
+		}
+	}
+}
+
+static void _rtl_rc_rate_set_series(struct rtl_priv *rtlpriv,
+				    struct ieee80211_sta *sta,
+				    struct ieee80211_tx_rate *rate,
+				    struct ieee80211_tx_rate_control *txrc,
+				    u8 tries, char rix, int rtsctsenable,
+				    bool not_data)
+{
+	struct rtl_mac *mac = rtl_mac(rtlpriv);
+	struct rtl_sta_info *sta_entry = NULL;
+	u8 wireless_mode = 0;
+	u8 sgi_20 = 0, sgi_40 = 0, sgi_80 = 0;
+
+	if (sta) {
+		sgi_20 = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20;
+		sgi_40 = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40;
+		sgi_80 = sta->vht_cap.cap & IEEE80211_VHT_CAP_SHORT_GI_80;
+		sta_entry = (struct rtl_sta_info *)sta->drv_priv;
+		wireless_mode = sta_entry->wireless_mode;
+	}
+	rate->count = tries;
+	rate->idx = rix >= 0x00 ? rix : 0x00;
+	if (rtlpriv->rtlhal.hw_type == HARDWARE_TYPE_RTL8812AE &&
+	    wireless_mode == WIRELESS_MODE_AC_5G)
+		rate->idx += 0x10;/*2NSS for 8812AE*/
+
+	if (!not_data) {
+		if (txrc->short_preamble)
+			rate->flags |= IEEE80211_TX_RC_USE_SHORT_PREAMBLE;
+		if (mac->opmode == NL80211_IFTYPE_AP ||
+			mac->opmode == NL80211_IFTYPE_ADHOC) {
+			if (sta && (sta->ht_cap.cap &
+				    IEEE80211_HT_CAP_SUP_WIDTH_20_40))
+				rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
+			if (sta && (sta->vht_cap.vht_supported))
+				rate->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
+		} else {
+			if (mac->bw_40)
+				rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
+			if (mac->bw_80)
+				rate->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
+		}
+
+		if (sgi_20 || sgi_40 || sgi_80)
+			rate->flags |= IEEE80211_TX_RC_SHORT_GI;
+		if (sta && sta->ht_cap.ht_supported &&
+		    ((wireless_mode == WIRELESS_MODE_N_5G) ||
+		     (wireless_mode == WIRELESS_MODE_N_24G)))
+			rate->flags |= IEEE80211_TX_RC_MCS;
+	}
+}
+
+static void rtl_get_rate(void *ppriv, struct ieee80211_sta *sta,
+			 void *priv_sta,
+			 struct ieee80211_tx_rate_control *txrc)
+{
+	struct rtl_priv *rtlpriv = ppriv;
+	struct sk_buff *skb = txrc->skb;
+	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
+	struct ieee80211_tx_rate *rates = tx_info->control.rates;
+	__le16 fc = rtl_get_fc(skb);
+	u8 try_per_rate, i, rix;
+	bool not_data = !ieee80211_is_data(fc);
+
+	if (rate_control_send_low(sta, priv_sta, txrc))
+		return;
+
+	rix = _rtl_rc_get_highest_rix(rtlpriv, sta, skb, not_data);
+	try_per_rate = 1;
+	_rtl_rc_rate_set_series(rtlpriv, sta, &rates[0], txrc,
+				try_per_rate, rix, 1, not_data);
+
+	if (!not_data) {
+		for (i = 1; i < 4; i++)
+			_rtl_rc_rate_set_series(rtlpriv, sta, &rates[i],
+						txrc, i, (rix - i), 1,
+						not_data);
+	}
+}
+
+static bool _rtl_tx_aggr_check(struct rtl_priv *rtlpriv,
+			       struct rtl_sta_info *sta_entry, u16 tid)
+{
+	struct rtl_mac *mac = rtl_mac(rtlpriv);
+
+	if (mac->act_scanning)
+		return false;
+
+	if (mac->opmode == NL80211_IFTYPE_STATION &&
+	    mac->cnt_after_linked < 3)
+		return false;
+
+	if (sta_entry->tids[tid].agg.agg_state == RTL_AGG_STOP)
+		return true;
+
+	return false;
+}
+
+/*mac80211 Rate Control callbacks*/
+static void rtl_tx_status(void *ppriv,
+			  struct ieee80211_supported_band *sband,
+			  struct ieee80211_sta *sta, void *priv_sta,
+			  struct sk_buff *skb)
+{
+	struct rtl_priv *rtlpriv = ppriv;
+	struct rtl_mac *mac = rtl_mac(rtlpriv);
+	struct ieee80211_hdr *hdr = rtl_get_hdr(skb);
+	__le16 fc = rtl_get_fc(skb);
+	struct rtl_sta_info *sta_entry;
+
+	if (!priv_sta || !ieee80211_is_data(fc))
+		return;
+
+	if (rtl_is_special_data(mac->hw, skb, true, true))
+		return;
+
+	if (is_multicast_ether_addr(ieee80211_get_DA(hdr)) ||
+	    is_broadcast_ether_addr(ieee80211_get_DA(hdr)))
+		return;
+
+	if (sta) {
+		/* Check if aggregation has to be enabled for this tid */
+		sta_entry = (struct rtl_sta_info *) sta->drv_priv;
+		if ((sta->ht_cap.ht_supported) &&
+		    !(skb->protocol == cpu_to_be16(ETH_P_PAE))) {
+			if (ieee80211_is_data_qos(fc)) {
+				u8 tid = rtl_get_tid(skb);
+				if (_rtl_tx_aggr_check(rtlpriv, sta_entry,
+						       tid)) {
+					sta_entry->tids[tid].agg.agg_state =
+						RTL_AGG_PROGRESS;
+					ieee80211_start_tx_ba_session(sta, tid,
+								      5000);
+				}
+			}
+		}
+	}
+}
+
+static void rtl_rate_init(void *ppriv,
+			  struct ieee80211_supported_band *sband,
+			  struct cfg80211_chan_def *chandef,
+			  struct ieee80211_sta *sta, void *priv_sta)
+{
+}
+
+static void rtl_rate_update(void *ppriv,
+			    struct ieee80211_supported_band *sband,
+			    struct cfg80211_chan_def *chandef,
+			    struct ieee80211_sta *sta, void *priv_sta,
+			    u32 changed)
+{
+}
+
+static void *rtl_rate_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
+{
+	struct rtl_priv *rtlpriv = rtl_priv(hw);
+	return rtlpriv;
+}
+
+static void rtl_rate_free(void *rtlpriv)
+{
+	return;
+}
+
+static void *rtl_rate_alloc_sta(void *ppriv,
+				struct ieee80211_sta *sta, gfp_t gfp)
+{
+	struct rtl_priv *rtlpriv = ppriv;
+	struct rtl_rate_priv *rate_priv;
+
+	rate_priv = kzalloc(sizeof(struct rtl_rate_priv), gfp);
+	if (!rate_priv) {
+		RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
+			 "Unable to allocate private rc structure\n");
+		return NULL;
+	}
+
+	rtlpriv->rate_priv = rate_priv;
+
+	return rate_priv;
+}
+
+static void rtl_rate_free_sta(void *rtlpriv,
+			      struct ieee80211_sta *sta, void *priv_sta)
+{
+	struct rtl_rate_priv *rate_priv = priv_sta;
+	kfree(rate_priv);
+}
+
+static struct rate_control_ops rtl_rate_ops = {
+	.name = "rtl_rc",
+	.alloc = rtl_rate_alloc,
+	.free = rtl_rate_free,
+	.alloc_sta = rtl_rate_alloc_sta,
+	.free_sta = rtl_rate_free_sta,
+	.rate_init = rtl_rate_init,
+	.rate_update = rtl_rate_update,
+	.tx_status = rtl_tx_status,
+	.get_rate = rtl_get_rate,
+};
+
+int rtl_rate_control_register(void)
+{
+	return ieee80211_rate_control_register(&rtl_rate_ops);
+}
+
+void rtl_rate_control_unregister(void)
+{
+	ieee80211_rate_control_unregister(&rtl_rate_ops);
+}