mt76x0: main file

Add main file of mt76x0 driver.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/mediatek/mt76/mt76x0/main.c

+/*
+ * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
+ * Copyright (C) 2018 Stanislaw Gruszka <stf_xl@wp.pl>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * 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.
+ */
+
+#include "mt76x0.h"
+#include "mac.h"
+#include <linux/etherdevice.h>
+
+static int mt76x0_start(struct ieee80211_hw *hw)
+{
+	struct mt76x0_dev *dev = hw->priv;
+	int ret;
+
+	mutex_lock(&dev->mutex);
+
+	ret = mt76x0_mac_start(dev);
+	if (ret)
+		goto out;
+
+	ieee80211_queue_delayed_work(dev->mt76.hw, &dev->mac_work,
+				     MT_CALIBRATE_INTERVAL);
+	ieee80211_queue_delayed_work(dev->mt76.hw, &dev->cal_work,
+				     MT_CALIBRATE_INTERVAL);
+out:
+	mutex_unlock(&dev->mutex);
+	return ret;
+}
+
+static void mt76x0_stop(struct ieee80211_hw *hw)
+{
+	struct mt76x0_dev *dev = hw->priv;
+
+	mutex_lock(&dev->mutex);
+
+	cancel_delayed_work_sync(&dev->cal_work);
+	cancel_delayed_work_sync(&dev->mac_work);
+	mt76x0_mac_stop(dev);
+
+	mutex_unlock(&dev->mutex);
+}
+
+
+static int mt76x0_add_interface(struct ieee80211_hw *hw,
+				 struct ieee80211_vif *vif)
+{
+	struct mt76x0_dev *dev = hw->priv;
+	struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
+	unsigned int idx;
+
+	idx = ffs(~dev->vif_mask);
+	if (!idx || idx > 8)
+		return -ENOSPC;
+
+	idx--;
+	dev->vif_mask |= BIT(idx);
+
+	mvif->idx = idx;
+	mvif->group_wcid.idx = GROUP_WCID(idx);
+	mvif->group_wcid.hw_key_idx = -1;
+
+	return 0;
+}
+
+static void mt76x0_remove_interface(struct ieee80211_hw *hw,
+				     struct ieee80211_vif *vif)
+{
+	struct mt76x0_dev *dev = hw->priv;
+	struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
+	unsigned int wcid = mvif->group_wcid.idx;
+
+	dev->wcid_mask[wcid / BITS_PER_LONG] &= ~BIT(wcid % BITS_PER_LONG);
+}
+
+static int mt76x0_config(struct ieee80211_hw *hw, u32 changed)
+{
+	struct mt76x0_dev *dev = hw->priv;
+	int ret = 0;
+
+	mutex_lock(&dev->mutex);
+
+	if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
+		if (!(hw->conf.flags & IEEE80211_CONF_MONITOR))
+			dev->rxfilter |= MT_RX_FILTR_CFG_PROMISC;
+		else
+			dev->rxfilter &= ~MT_RX_FILTR_CFG_PROMISC;
+
+		mt76_wr(dev, MT_RX_FILTR_CFG, dev->rxfilter);
+	}
+
+	if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
+		ieee80211_stop_queues(hw);
+		ret = mt76x0_phy_set_channel(dev, &hw->conf.chandef);
+		ieee80211_wake_queues(hw);
+	}
+
+	mutex_unlock(&dev->mutex);
+
+	return ret;
+}
+
+static void
+mt76_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
+		      unsigned int *total_flags, u64 multicast)
+{
+	struct mt76x0_dev *dev = hw->priv;
+	u32 flags = 0;
+
+#define MT76_FILTER(_flag, _hw) do { \
+		flags |= *total_flags & FIF_##_flag;			\
+		dev->rxfilter &= ~(_hw);				\
+		dev->rxfilter |= !(flags & FIF_##_flag) * (_hw);	\
+	} while (0)
+
+	mutex_lock(&dev->mutex);
+
+	dev->rxfilter &= ~MT_RX_FILTR_CFG_OTHER_BSS;
+
+	MT76_FILTER(FCSFAIL, MT_RX_FILTR_CFG_CRC_ERR);
+	MT76_FILTER(PLCPFAIL, MT_RX_FILTR_CFG_PHY_ERR);
+	MT76_FILTER(CONTROL, MT_RX_FILTR_CFG_ACK |
+			     MT_RX_FILTR_CFG_CTS |
+			     MT_RX_FILTR_CFG_CFEND |
+			     MT_RX_FILTR_CFG_CFACK |
+			     MT_RX_FILTR_CFG_BA |
+			     MT_RX_FILTR_CFG_CTRL_RSV);
+	MT76_FILTER(PSPOLL, MT_RX_FILTR_CFG_PSPOLL);
+
+	*total_flags = flags;
+	mt76_wr(dev, MT_RX_FILTR_CFG, dev->rxfilter);
+
+	mutex_unlock(&dev->mutex);
+}
+
+static void
+mt76x0_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+			 struct ieee80211_bss_conf *info, u32 changed)
+{
+	struct mt76x0_dev *dev = hw->priv;
+
+	mutex_lock(&dev->mutex);
+
+	if (changed & BSS_CHANGED_ASSOC)
+		mt76x0_phy_con_cal_onoff(dev, info);
+
+	if (changed & BSS_CHANGED_BSSID) {
+		mt76x0_addr_wr(dev, MT_MAC_BSSID_DW0, info->bssid);
+
+		/* Note: this is a hack because beacon_int is not changed
+		 *	 on leave nor is any more appropriate event generated.
+		 *	 rt2x00 doesn't seem to be bothered though.
+		 */
+		if (is_zero_ether_addr(info->bssid))
+			mt76x0_mac_config_tsf(dev, false, 0);
+	}
+
+	if (changed & BSS_CHANGED_BASIC_RATES) {
+		mt76_wr(dev, MT_LEGACY_BASIC_RATE, info->basic_rates);
+		mt76_wr(dev, MT_HT_FBK_CFG0, 0x65432100);
+		mt76_wr(dev, MT_HT_FBK_CFG1, 0xedcba980);
+		mt76_wr(dev, MT_LG_FBK_CFG0, 0xedcba988);
+		mt76_wr(dev, MT_LG_FBK_CFG1, 0x00002100);
+	}
+
+	if (changed & BSS_CHANGED_BEACON_INT)
+		mt76x0_mac_config_tsf(dev, true, info->beacon_int);
+
+	if (changed & BSS_CHANGED_HT || changed & BSS_CHANGED_ERP_CTS_PROT)
+		mt76x0_mac_set_protection(dev, info->use_cts_prot,
+					   info->ht_operation_mode);
+
+	if (changed & BSS_CHANGED_ERP_PREAMBLE)
+		mt76x0_mac_set_short_preamble(dev, info->use_short_preamble);
+
+	if (changed & BSS_CHANGED_ERP_SLOT) {
+		int slottime = info->use_short_slot ? 9 : 20;
+
+		mt76_rmw_field(dev, MT_BKOFF_SLOT_CFG,
+			       MT_BKOFF_SLOT_CFG_SLOTTIME, slottime);
+	}
+
+	if (changed & BSS_CHANGED_ASSOC)
+		mt76x0_phy_recalibrate_after_assoc(dev);
+
+	mutex_unlock(&dev->mutex);
+}
+
+static int
+mt76x0_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+		struct ieee80211_sta *sta)
+{
+	struct mt76x0_dev *dev = hw->priv;
+	struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
+	struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
+	int ret = 0;
+	int idx = 0;
+
+	mutex_lock(&dev->mutex);
+
+	idx = mt76_wcid_alloc(dev->wcid_mask, ARRAY_SIZE(dev->wcid));
+	if (idx < 0) {
+		ret = -ENOSPC;
+		goto out;
+	}
+
+	msta->wcid.idx = idx;
+	msta->wcid.hw_key_idx = -1;
+	mt76x0_mac_wcid_setup(dev, idx, mvif->idx, sta->addr);
+	mt76_clear(dev, MT_WCID_DROP(idx), MT_WCID_DROP_MASK(idx));
+	rcu_assign_pointer(dev->wcid[idx], &msta->wcid);
+	mt76x0_mac_set_ampdu_factor(dev);
+
+out:
+	mutex_unlock(&dev->mutex);
+
+	return ret;
+}
+
+static int
+mt76x0_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+		   struct ieee80211_sta *sta)
+{
+	struct mt76x0_dev *dev = hw->priv;
+	struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
+	int idx = msta->wcid.idx;
+
+	mutex_lock(&dev->mutex);
+	rcu_assign_pointer(dev->wcid[idx], NULL);
+	mt76_set(dev, MT_WCID_DROP(idx), MT_WCID_DROP_MASK(idx));
+	dev->wcid_mask[idx / BITS_PER_LONG] &= ~BIT(idx % BITS_PER_LONG);
+	mt76x0_mac_wcid_setup(dev, idx, 0, NULL);
+	mt76x0_mac_set_ampdu_factor(dev);
+	mutex_unlock(&dev->mutex);
+
+	return 0;
+}
+
+static void
+mt76x0_sta_notify(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+		   enum sta_notify_cmd cmd, struct ieee80211_sta *sta)
+{
+}
+
+static void
+mt76x0_sw_scan(struct ieee80211_hw *hw,
+		struct ieee80211_vif *vif,
+		const u8 *mac_addr)
+{
+	struct mt76x0_dev *dev = hw->priv;
+
+	cancel_delayed_work_sync(&dev->cal_work);
+	mt76x0_agc_save(dev);
+	set_bit(MT76_SCANNING, &dev->mt76.state);
+}
+
+static void
+mt76x0_sw_scan_complete(struct ieee80211_hw *hw,
+			 struct ieee80211_vif *vif)
+{
+	struct mt76x0_dev *dev = hw->priv;
+
+	mt76x0_agc_restore(dev);
+	clear_bit(MT76_SCANNING, &dev->mt76.state);
+
+	ieee80211_queue_delayed_work(dev->mt76.hw, &dev->cal_work,
+				     MT_CALIBRATE_INTERVAL);
+}
+
+static int
+mt76x0_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
+		struct ieee80211_vif *vif, struct ieee80211_sta *sta,
+		struct ieee80211_key_conf *key)
+{
+	struct mt76x0_dev *dev = hw->priv;
+	struct mt76_vif *mvif = (struct mt76_vif *) vif->drv_priv;
+	struct mt76_sta *msta = sta ? (struct mt76_sta *) sta->drv_priv : NULL;
+	struct mt76_wcid *wcid = msta ? &msta->wcid : &mvif->group_wcid;
+	int idx = key->keyidx;
+	int ret;
+
+	if (cmd == SET_KEY) {
+		key->hw_key_idx = wcid->idx;
+		wcid->hw_key_idx = idx;
+	} else {
+		if (idx == wcid->hw_key_idx)
+			wcid->hw_key_idx = -1;
+
+		key = NULL;
+	}
+
+	if (!msta) {
+		if (key || wcid->hw_key_idx == idx) {
+			ret = mt76_mac_wcid_set_key(dev, wcid->idx, key);
+			if (ret)
+				return ret;
+		}
+
+		return mt76_mac_shared_key_setup(dev, mvif->idx, idx, key);
+	}
+
+	return mt76_mac_wcid_set_key(dev, msta->wcid.idx, key);
+}
+
+static int mt76x0_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
+{
+	struct mt76x0_dev *dev = hw->priv;
+
+	mt76_rmw_field(dev, MT_TX_RTS_CFG, MT_TX_RTS_CFG_THRESH, value);
+
+	return 0;
+}
+
+static int
+mt76_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+		  struct ieee80211_ampdu_params *params)
+{
+	struct mt76x0_dev *dev = hw->priv;
+	struct ieee80211_sta *sta = params->sta;
+	enum ieee80211_ampdu_mlme_action action = params->action;
+	u16 tid = params->tid;
+	u16 *ssn = &params->ssn;
+	struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
+
+	WARN_ON(msta->wcid.idx > N_WCIDS);
+
+	switch (action) {
+	case IEEE80211_AMPDU_RX_START:
+		mt76_set(dev, MT_WCID_ADDR(msta->wcid.idx) + 4, BIT(16 + tid));
+		break;
+	case IEEE80211_AMPDU_RX_STOP:
+		mt76_clear(dev, MT_WCID_ADDR(msta->wcid.idx) + 4, BIT(16 + tid));
+		break;
+	case IEEE80211_AMPDU_TX_OPERATIONAL:
+		ieee80211_send_bar(vif, sta->addr, tid, msta->agg_ssn[tid]);
+		break;
+	case IEEE80211_AMPDU_TX_STOP_FLUSH:
+	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
+		break;
+	case IEEE80211_AMPDU_TX_START:
+		msta->agg_ssn[tid] = *ssn << 4;
+		ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
+		break;
+	case IEEE80211_AMPDU_TX_STOP_CONT:
+		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
+		break;
+	}
+
+	return 0;
+}
+
+static void
+mt76_sta_rate_tbl_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+			 struct ieee80211_sta *sta)
+{
+	struct mt76x0_dev *dev = hw->priv;
+	struct mt76_sta *msta = (struct mt76_sta *) sta->drv_priv;
+	struct ieee80211_sta_rates *rates;
+	struct ieee80211_tx_rate rate = {};
+
+	rcu_read_lock();
+	rates = rcu_dereference(sta->rates);
+
+	if (!rates)
+		goto out;
+
+	rate.idx = rates->rate[0].idx;
+	rate.flags = rates->rate[0].flags;
+	mt76_mac_wcid_set_rate(dev, &msta->wcid, &rate);
+
+out:
+	rcu_read_unlock();
+}
+
+const struct ieee80211_ops mt76x0_ops = {
+	.tx = mt76x0_tx,
+	.start = mt76x0_start,
+	.stop = mt76x0_stop,
+	.add_interface = mt76x0_add_interface,
+	.remove_interface = mt76x0_remove_interface,
+	.config = mt76x0_config,
+	.configure_filter = mt76_configure_filter,
+	.bss_info_changed = mt76x0_bss_info_changed,
+	.sta_add = mt76x0_sta_add,
+	.sta_remove = mt76x0_sta_remove,
+	.sta_notify = mt76x0_sta_notify,
+	.set_key = mt76x0_set_key,
+	.conf_tx = mt76x0_conf_tx,
+	.sw_scan_start = mt76x0_sw_scan,
+	.sw_scan_complete = mt76x0_sw_scan_complete,
+	.ampdu_action = mt76_ampdu_action,
+	.sta_rate_tbl_update = mt76_sta_rate_tbl_update,
+	.set_rts_threshold = mt76x0_set_rts_threshold,
+};