1 files changed, 444 insertions, 0 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_util.c b/drivers/net/wireless/mediatek/mt76/mt76x02_util.c
new file mode 100644
index 000000000000..5851ab6b7e26
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt76x02_util.c
@@ -0,0 +1,444 @@
+/*
+ * Copyright (C) 2018 Stanislaw Gruszka <stf_xl@wp.pl>
+ * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/module.h>
+#include "mt76x02.h"
+
+#define CCK_RATE(_idx, _rate) {					\
+	.bitrate = _rate,					\
+	.flags = IEEE80211_RATE_SHORT_PREAMBLE,			\
+	.hw_value = (MT_PHY_TYPE_CCK << 8) | _idx,		\
+	.hw_value_short = (MT_PHY_TYPE_CCK << 8) | (8 + _idx),	\
+}
+
+#define OFDM_RATE(_idx, _rate) {				\
+	.bitrate = _rate,					\
+	.hw_value = (MT_PHY_TYPE_OFDM << 8) | _idx,		\
+	.hw_value_short = (MT_PHY_TYPE_OFDM << 8) | _idx,	\
+}
+
+struct ieee80211_rate mt76x02_rates[] = {
+	CCK_RATE(0, 10),
+	CCK_RATE(1, 20),
+	CCK_RATE(2, 55),
+	CCK_RATE(3, 110),
+	OFDM_RATE(0, 60),
+	OFDM_RATE(1, 90),
+	OFDM_RATE(2, 120),
+	OFDM_RATE(3, 180),
+	OFDM_RATE(4, 240),
+	OFDM_RATE(5, 360),
+	OFDM_RATE(6, 480),
+	OFDM_RATE(7, 540),
+};
+EXPORT_SYMBOL_GPL(mt76x02_rates);
+
+void mt76x02_configure_filter(struct ieee80211_hw *hw,
+			     unsigned int changed_flags,
+			     unsigned int *total_flags, u64 multicast)
+{
+	struct mt76_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;
+	dev->bus->wr(dev, MT_RX_FILTR_CFG, dev->rxfilter);
+
+	mutex_unlock(&dev->mutex);
+}
+EXPORT_SYMBOL_GPL(mt76x02_configure_filter);
+
+int mt76x02_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+		   struct ieee80211_sta *sta)
+{
+	struct mt76_dev *dev = hw->priv;
+	struct mt76x02_sta *msta = (struct mt76x02_sta *) sta->drv_priv;
+	struct mt76x02_vif *mvif = (struct mt76x02_vif *) vif->drv_priv;
+	int ret = 0;
+	int idx = 0;
+	int i;
+
+	mutex_lock(&dev->mutex);
+
+	idx = mt76_wcid_alloc(dev->wcid_mask, ARRAY_SIZE(dev->wcid));
+	if (idx < 0) {
+		ret = -ENOSPC;
+		goto out;
+	}
+
+	msta->vif = mvif;
+	msta->wcid.sta = 1;
+	msta->wcid.idx = idx;
+	msta->wcid.hw_key_idx = -1;
+	mt76x02_mac_wcid_setup(dev, idx, mvif->idx, sta->addr);
+	mt76x02_mac_wcid_set_drop(dev, idx, false);
+	for (i = 0; i < ARRAY_SIZE(sta->txq); i++)
+		mt76x02_txq_init(dev, sta->txq[i]);
+
+	if (vif->type == NL80211_IFTYPE_AP)
+		set_bit(MT_WCID_FLAG_CHECK_PS, &msta->wcid.flags);
+
+	ewma_signal_init(&msta->rssi);
+
+	rcu_assign_pointer(dev->wcid[idx], &msta->wcid);
+
+out:
+	mutex_unlock(&dev->mutex);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(mt76x02_sta_add);
+
+int mt76x02_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+		      struct ieee80211_sta *sta)
+{
+	struct mt76_dev *dev = hw->priv;
+	struct mt76x02_sta *msta = (struct mt76x02_sta *) sta->drv_priv;
+	int idx = msta->wcid.idx;
+	int i;
+
+	mutex_lock(&dev->mutex);
+	rcu_assign_pointer(dev->wcid[idx], NULL);
+	for (i = 0; i < ARRAY_SIZE(sta->txq); i++)
+		mt76_txq_remove(dev, sta->txq[i]);
+	mt76x02_mac_wcid_set_drop(dev, idx, true);
+	mt76_wcid_free(dev->wcid_mask, idx);
+	mt76x02_mac_wcid_setup(dev, idx, 0, NULL);
+	mutex_unlock(&dev->mutex);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mt76x02_sta_remove);
+
+void mt76x02_vif_init(struct mt76_dev *dev, struct ieee80211_vif *vif,
+		     unsigned int idx)
+{
+	struct mt76x02_vif *mvif = (struct mt76x02_vif *) vif->drv_priv;
+
+	mvif->idx = idx;
+	mvif->group_wcid.idx = MT_VIF_WCID(idx);
+	mvif->group_wcid.hw_key_idx = -1;
+	mt76x02_txq_init(dev, vif->txq);
+}
+EXPORT_SYMBOL_GPL(mt76x02_vif_init);
+
+int
+mt76x02_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
+{
+	struct mt76_dev *dev = hw->priv;
+	unsigned int idx = 0;
+
+	if (vif->addr[0] & BIT(1))
+		idx = 1 + (((dev->macaddr[0] ^ vif->addr[0]) >> 2) & 7);
+
+	/*
+	 * Client mode typically only has one configurable BSSID register,
+	 * which is used for bssidx=0. This is linked to the MAC address.
+	 * Since mac80211 allows changing interface types, and we cannot
+	 * force the use of the primary MAC address for a station mode
+	 * interface, we need some other way of configuring a per-interface
+	 * remote BSSID.
+	 * The hardware provides an AP-Client feature, where bssidx 0-7 are
+	 * used for AP mode and bssidx 8-15 for client mode.
+	 * We shift the station interface bss index by 8 to force the
+	 * hardware to recognize the BSSID.
+	 * The resulting bssidx mismatch for unicast frames is ignored by hw.
+	 */
+	if (vif->type == NL80211_IFTYPE_STATION)
+		idx += 8;
+
+	mt76x02_vif_init(dev, vif, idx);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mt76x02_add_interface);
+
+void mt76x02_remove_interface(struct ieee80211_hw *hw,
+			     struct ieee80211_vif *vif)
+{
+	struct mt76_dev *dev = hw->priv;
+
+	mt76_txq_remove(dev, vif->txq);
+}
+EXPORT_SYMBOL_GPL(mt76x02_remove_interface);
+
+int mt76x02_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+			struct ieee80211_ampdu_params *params)
+{
+	enum ieee80211_ampdu_mlme_action action = params->action;
+	struct ieee80211_sta *sta = params->sta;
+	struct mt76_dev *dev = hw->priv;
+	struct mt76x02_sta *msta = (struct mt76x02_sta *) sta->drv_priv;
+	struct ieee80211_txq *txq = sta->txq[params->tid];
+	u16 tid = params->tid;
+	u16 *ssn = &params->ssn;
+	struct mt76_txq *mtxq;
+
+	if (!txq)
+		return -EINVAL;
+
+	mtxq = (struct mt76_txq *)txq->drv_priv;
+
+	switch (action) {
+	case IEEE80211_AMPDU_RX_START:
+		mt76_rx_aggr_start(dev, &msta->wcid, tid, *ssn, params->buf_size);
+		__mt76_set(dev, MT_WCID_ADDR(msta->wcid.idx) + 4, BIT(16 + tid));
+		break;
+	case IEEE80211_AMPDU_RX_STOP:
+		mt76_rx_aggr_stop(dev, &msta->wcid, tid);
+		__mt76_clear(dev, MT_WCID_ADDR(msta->wcid.idx) + 4, BIT(16 + tid));
+		break;
+	case IEEE80211_AMPDU_TX_OPERATIONAL:
+		mtxq->aggr = true;
+		mtxq->send_bar = false;
+		ieee80211_send_bar(vif, sta->addr, tid, mtxq->agg_ssn);
+		break;
+	case IEEE80211_AMPDU_TX_STOP_FLUSH:
+	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
+		mtxq->aggr = false;
+		ieee80211_send_bar(vif, sta->addr, tid, mtxq->agg_ssn);
+		break;
+	case IEEE80211_AMPDU_TX_START:
+		mtxq->agg_ssn = *ssn << 4;
+		ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
+		break;
+	case IEEE80211_AMPDU_TX_STOP_CONT:
+		mtxq->aggr = false;
+		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
+		break;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mt76x02_ampdu_action);
+
+int mt76x02_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 mt76_dev *dev = hw->priv;
+	struct mt76x02_vif *mvif = (struct mt76x02_vif *) vif->drv_priv;
+	struct mt76x02_sta *msta;
+	struct mt76_wcid *wcid;
+	int idx = key->keyidx;
+	int ret;
+
+	/* fall back to sw encryption for unsupported ciphers */
+	switch (key->cipher) {
+	case WLAN_CIPHER_SUITE_WEP40:
+	case WLAN_CIPHER_SUITE_WEP104:
+	case WLAN_CIPHER_SUITE_TKIP:
+	case WLAN_CIPHER_SUITE_CCMP:
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	/*
+	 * The hardware does not support per-STA RX GTK, fall back
+	 * to software mode for these.
+	 */
+	if ((vif->type == NL80211_IFTYPE_ADHOC ||
+	     vif->type == NL80211_IFTYPE_MESH_POINT) &&
+	    (key->cipher == WLAN_CIPHER_SUITE_TKIP ||
+	     key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
+	    !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
+		return -EOPNOTSUPP;
+
+	msta = sta ? (struct mt76x02_sta *) sta->drv_priv : NULL;
+	wcid = msta ? &msta->wcid : &mvif->group_wcid;
+
+	if (cmd == SET_KEY) {
+		key->hw_key_idx = wcid->idx;
+		wcid->hw_key_idx = idx;
+		if (key->flags & IEEE80211_KEY_FLAG_RX_MGMT) {
+			key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX;
+			wcid->sw_iv = true;
+		}
+	} else {
+		if (idx == wcid->hw_key_idx) {
+			wcid->hw_key_idx = -1;
+			wcid->sw_iv = true;
+		}
+
+		key = NULL;
+	}
+	mt76_wcid_key_setup(dev, wcid, key);
+
+	if (!msta) {
+		if (key || wcid->hw_key_idx == idx) {
+			ret = mt76x02_mac_wcid_set_key(dev, wcid->idx, key);
+			if (ret)
+				return ret;
+		}
+
+		return mt76x02_mac_shared_key_setup(dev, mvif->idx, idx, key);
+	}
+
+	return mt76x02_mac_wcid_set_key(dev, msta->wcid.idx, key);
+}
+EXPORT_SYMBOL_GPL(mt76x02_set_key);
+
+int mt76x02_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+		   u16 queue, const struct ieee80211_tx_queue_params *params)
+{
+	struct mt76_dev *dev = hw->priv;
+	u8 cw_min = 5, cw_max = 10, qid;
+	u32 val;
+
+	qid = dev->q_tx[queue].hw_idx;
+
+	if (params->cw_min)
+		cw_min = fls(params->cw_min);
+	if (params->cw_max)
+		cw_max = fls(params->cw_max);
+
+	val = FIELD_PREP(MT_EDCA_CFG_TXOP, params->txop) |
+	      FIELD_PREP(MT_EDCA_CFG_AIFSN, params->aifs) |
+	      FIELD_PREP(MT_EDCA_CFG_CWMIN, cw_min) |
+	      FIELD_PREP(MT_EDCA_CFG_CWMAX, cw_max);
+	__mt76_wr(dev, MT_EDCA_CFG_AC(qid), val);
+
+	val = __mt76_rr(dev, MT_WMM_TXOP(qid));
+	val &= ~(MT_WMM_TXOP_MASK << MT_WMM_TXOP_SHIFT(qid));
+	val |= params->txop << MT_WMM_TXOP_SHIFT(qid);
+	__mt76_wr(dev, MT_WMM_TXOP(qid), val);
+
+	val = __mt76_rr(dev, MT_WMM_AIFSN);
+	val &= ~(MT_WMM_AIFSN_MASK << MT_WMM_AIFSN_SHIFT(qid));
+	val |= params->aifs << MT_WMM_AIFSN_SHIFT(qid);
+	__mt76_wr(dev, MT_WMM_AIFSN, val);
+
+	val = __mt76_rr(dev, MT_WMM_CWMIN);
+	val &= ~(MT_WMM_CWMIN_MASK << MT_WMM_CWMIN_SHIFT(qid));
+	val |= cw_min << MT_WMM_CWMIN_SHIFT(qid);
+	__mt76_wr(dev, MT_WMM_CWMIN, val);
+
+	val = __mt76_rr(dev, MT_WMM_CWMAX);
+	val &= ~(MT_WMM_CWMAX_MASK << MT_WMM_CWMAX_SHIFT(qid));
+	val |= cw_max << MT_WMM_CWMAX_SHIFT(qid);
+	__mt76_wr(dev, MT_WMM_CWMAX, val);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mt76x02_conf_tx);
+
+void mt76x02_sta_rate_tbl_update(struct ieee80211_hw *hw,
+				struct ieee80211_vif *vif,
+				struct ieee80211_sta *sta)
+{
+	struct mt76_dev *dev = hw->priv;
+	struct mt76x02_sta *msta = (struct mt76x02_sta *) sta->drv_priv;
+	struct ieee80211_sta_rates *rates = rcu_dereference(sta->rates);
+	struct ieee80211_tx_rate rate = {};
+
+	if (!rates)
+		return;
+
+	rate.idx = rates->rate[0].idx;
+	rate.flags = rates->rate[0].flags;
+	mt76x02_mac_wcid_set_rate(dev, &msta->wcid, &rate);
+	msta->wcid.max_txpwr_adj = mt76x02_tx_get_max_txpwr_adj(dev, &rate);
+}
+EXPORT_SYMBOL_GPL(mt76x02_sta_rate_tbl_update);
+
+int mt76x02_insert_hdr_pad(struct sk_buff *skb)
+{
+	int len = ieee80211_get_hdrlen_from_skb(skb);
+
+	if (len % 4 == 0)
+		return 0;
+
+	skb_push(skb, 2);
+	memmove(skb->data, skb->data + 2, len);
+
+	skb->data[len] = 0;
+	skb->data[len + 1] = 0;
+	return 2;
+}
+EXPORT_SYMBOL_GPL(mt76x02_insert_hdr_pad);
+
+void mt76x02_remove_hdr_pad(struct sk_buff *skb, int len)
+{
+	int hdrlen;
+
+	if (!len)
+		return;
+
+	hdrlen = ieee80211_get_hdrlen_from_skb(skb);
+	memmove(skb->data + len, skb->data, hdrlen);
+	skb_pull(skb, len);
+}
+EXPORT_SYMBOL_GPL(mt76x02_remove_hdr_pad);
+
+const u16 mt76x02_beacon_offsets[16] = {
+	/* 1024 byte per beacon */
+	0xc000,
+	0xc400,
+	0xc800,
+	0xcc00,
+	0xd000,
+	0xd400,
+	0xd800,
+	0xdc00,
+	/* BSS idx 8-15 not used for beacons */
+	0xc000,
+	0xc000,
+	0xc000,
+	0xc000,
+	0xc000,
+	0xc000,
+	0xc000,
+	0xc000,
+};
+EXPORT_SYMBOL_GPL(mt76x02_beacon_offsets);
+
+void mt76x02_set_beacon_offsets(struct mt76_dev *dev)
+{
+	u16 val, base = MT_BEACON_BASE;
+	u32 regs[4] = {};
+	int i;
+
+	for (i = 0; i < 16; i++) {
+		val = mt76x02_beacon_offsets[i] - base;
+		regs[i / 4] |= (val / 64) << (8 * (i % 4));
+	}
+
+	for (i = 0; i < 4; i++)
+		__mt76_wr(dev, MT_BCN_OFFSET(i), regs[i]);
+}
+EXPORT_SYMBOL_GPL(mt76x02_set_beacon_offsets);
+
+MODULE_LICENSE("Dual BSD/GPL");