1 files changed, 293 insertions, 0 deletions

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/pci_mac.c b/drivers/net/wireless/mediatek/mt76/mt7615/pci_mac.c
new file mode 100644
index 000000000..0019890fd
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/pci_mac.c
@@ -0,0 +1,293 @@
+// SPDX-License-Identifier: ISC
+/* Copyright (C) 2020 MediaTek Inc.
+ *
+ * Author: Ryder Lee <ryder.lee@mediatek.com>
+ *         Roy Luo <royluo@google.com>
+ *         Felix Fietkau <nbd@nbd.name>
+ *         Lorenzo Bianconi <lorenzo@kernel.org>
+ */
+
+#include <linux/etherdevice.h>
+#include <linux/timekeeping.h>
+
+#include "mt7615.h"
+#include "../dma.h"
+#include "mac.h"
+
+static void
+mt7615_write_fw_txp(struct mt7615_dev *dev, struct mt76_tx_info *tx_info,
+		    void *txp_ptr, u32 id)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx_info->skb->data;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_info->skb);
+	struct ieee80211_key_conf *key = info->control.hw_key;
+	struct ieee80211_vif *vif = info->control.vif;
+	struct mt76_connac_fw_txp *txp = txp_ptr;
+	u8 *rept_wds_wcid = (u8 *)&txp->rept_wds_wcid;
+	int nbuf = tx_info->nbuf - 1;
+	int i;
+
+	for (i = 0; i < nbuf; i++) {
+		txp->buf[i] = cpu_to_le32(tx_info->buf[i + 1].addr);
+		txp->len[i] = cpu_to_le16(tx_info->buf[i + 1].len);
+	}
+	txp->nbuf = nbuf;
+
+	/* pass partial skb header to fw */
+	tx_info->buf[0].len = MT_TXD_SIZE + sizeof(*txp);
+	tx_info->buf[1].len = MT_CT_PARSE_LEN;
+	tx_info->buf[1].skip_unmap = true;
+	tx_info->nbuf = MT_CT_DMA_BUF_NUM;
+
+	txp->flags = cpu_to_le16(MT_CT_INFO_APPLY_TXD);
+
+	if (!key)
+		txp->flags |= cpu_to_le16(MT_CT_INFO_NONE_CIPHER_FRAME);
+
+	if (ieee80211_is_mgmt(hdr->frame_control))
+		txp->flags |= cpu_to_le16(MT_CT_INFO_MGMT_FRAME);
+
+	if (vif) {
+		struct mt76_vif *mvif = (struct mt76_vif *)vif->drv_priv;
+
+		txp->bss_idx = mvif->idx;
+	}
+
+	txp->token = cpu_to_le16(id);
+	*rept_wds_wcid = 0xff;
+}
+
+int mt7615_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
+			  enum mt76_txq_id qid, struct mt76_wcid *wcid,
+			  struct ieee80211_sta *sta,
+			  struct mt76_tx_info *tx_info)
+{
+	struct mt7615_dev *dev = container_of(mdev, struct mt7615_dev, mt76);
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_info->skb);
+	struct ieee80211_key_conf *key = info->control.hw_key;
+	int pid, id;
+	u8 *txwi = (u8 *)txwi_ptr;
+	struct mt76_txwi_cache *t;
+	struct mt7615_sta *msta;
+	void *txp;
+
+	msta = wcid ? container_of(wcid, struct mt7615_sta, wcid) : NULL;
+	if (!wcid)
+		wcid = &dev->mt76.global_wcid;
+
+	if ((info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) && msta) {
+		struct mt7615_phy *phy = &dev->phy;
+		u8 phy_idx = (info->hw_queue & MT_TX_HW_QUEUE_PHY) >> 2;
+
+		if (phy_idx && mdev->phys[MT_BAND1])
+			phy = mdev->phys[MT_BAND1]->priv;
+
+		spin_lock_bh(&dev->mt76.lock);
+		mt7615_mac_set_rates(phy, msta, &info->control.rates[0],
+				     msta->rates);
+		spin_unlock_bh(&dev->mt76.lock);
+	}
+
+	t = (struct mt76_txwi_cache *)(txwi + mdev->drv->txwi_size);
+	t->skb = tx_info->skb;
+
+	id = mt76_token_get(mdev, &t);
+	if (id < 0)
+		return id;
+
+	pid = mt76_tx_status_skb_add(mdev, wcid, tx_info->skb);
+	mt7615_mac_write_txwi(dev, txwi_ptr, tx_info->skb, wcid, sta,
+			      pid, key, qid, false);
+
+	txp = txwi + MT_TXD_SIZE;
+	memset(txp, 0, sizeof(struct mt76_connac_txp_common));
+	if (is_mt7615(&dev->mt76))
+		mt7615_write_fw_txp(dev, tx_info, txp, id);
+	else
+		mt76_connac_write_hw_txp(mdev, tx_info, txp, id);
+
+	tx_info->skb = DMA_DUMMY_DATA;
+
+	return 0;
+}
+
+void mt7615_dma_reset(struct mt7615_dev *dev)
+{
+	int i;
+
+	mt76_clear(dev, MT_WPDMA_GLO_CFG,
+		   MT_WPDMA_GLO_CFG_RX_DMA_EN | MT_WPDMA_GLO_CFG_TX_DMA_EN |
+		   MT_WPDMA_GLO_CFG_TX_WRITEBACK_DONE);
+
+	usleep_range(1000, 2000);
+
+	for (i = 0; i < __MT_TXQ_MAX; i++)
+		mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[i], true);
+
+	for (i = 0; i < __MT_MCUQ_MAX; i++)
+		mt76_queue_tx_cleanup(dev, dev->mt76.q_mcu[i], true);
+
+	mt76_for_each_q_rx(&dev->mt76, i)
+		mt76_queue_rx_reset(dev, i);
+
+	mt76_tx_status_check(&dev->mt76, true);
+
+	mt7615_dma_start(dev);
+}
+EXPORT_SYMBOL_GPL(mt7615_dma_reset);
+
+static void
+mt7615_hif_int_event_trigger(struct mt7615_dev *dev, u8 event)
+{
+	u32 reg = MT_MCU_INT_EVENT;
+
+	if (is_mt7663(&dev->mt76))
+		reg = MT7663_MCU_INT_EVENT;
+
+	mt76_wr(dev, reg, event);
+
+	mt7622_trigger_hif_int(dev, true);
+	mt7622_trigger_hif_int(dev, false);
+}
+
+static bool
+mt7615_wait_reset_state(struct mt7615_dev *dev, u32 state)
+{
+	bool ret;
+
+	ret = wait_event_timeout(dev->reset_wait,
+				 (READ_ONCE(dev->reset_state) & state),
+				 MT7615_RESET_TIMEOUT);
+	WARN(!ret, "Timeout waiting for MCU reset state %x\n", state);
+	return ret;
+}
+
+static void
+mt7615_update_vif_beacon(void *priv, u8 *mac, struct ieee80211_vif *vif)
+{
+	struct ieee80211_hw *hw = priv;
+	struct mt7615_dev *dev = mt7615_hw_dev(hw);
+
+	switch (vif->type) {
+	case NL80211_IFTYPE_MESH_POINT:
+	case NL80211_IFTYPE_ADHOC:
+	case NL80211_IFTYPE_AP:
+		mt7615_mcu_add_beacon(dev, hw, vif,
+				      vif->bss_conf.enable_beacon);
+		break;
+	default:
+		break;
+	}
+}
+
+static void
+mt7615_update_beacons(struct mt7615_dev *dev)
+{
+	struct mt76_phy *mphy_ext = dev->mt76.phys[MT_BAND1];
+
+	ieee80211_iterate_active_interfaces(dev->mt76.hw,
+		IEEE80211_IFACE_ITER_RESUME_ALL,
+		mt7615_update_vif_beacon, dev->mt76.hw);
+
+	if (!mphy_ext)
+		return;
+
+	ieee80211_iterate_active_interfaces(mphy_ext->hw,
+		IEEE80211_IFACE_ITER_RESUME_ALL,
+		mt7615_update_vif_beacon, mphy_ext->hw);
+}
+
+void mt7615_mac_reset_work(struct work_struct *work)
+{
+	struct mt7615_phy *phy2;
+	struct mt76_phy *ext_phy;
+	struct mt7615_dev *dev;
+	unsigned long timeout;
+	int i;
+
+	dev = container_of(work, struct mt7615_dev, reset_work);
+	ext_phy = dev->mt76.phys[MT_BAND1];
+	phy2 = ext_phy ? ext_phy->priv : NULL;
+
+	if (!(READ_ONCE(dev->reset_state) & MT_MCU_CMD_STOP_PDMA))
+		return;
+
+	ieee80211_stop_queues(mt76_hw(dev));
+	if (ext_phy)
+		ieee80211_stop_queues(ext_phy->hw);
+
+	set_bit(MT76_RESET, &dev->mphy.state);
+	set_bit(MT76_MCU_RESET, &dev->mphy.state);
+	wake_up(&dev->mt76.mcu.wait);
+	cancel_delayed_work_sync(&dev->mphy.mac_work);
+	del_timer_sync(&dev->phy.roc_timer);
+	cancel_work_sync(&dev->phy.roc_work);
+	if (phy2) {
+		set_bit(MT76_RESET, &phy2->mt76->state);
+		cancel_delayed_work_sync(&phy2->mt76->mac_work);
+		del_timer_sync(&phy2->roc_timer);
+		cancel_work_sync(&phy2->roc_work);
+	}
+
+	/* lock/unlock all queues to ensure that no tx is pending */
+	mt76_txq_schedule_all(&dev->mphy);
+	if (ext_phy)
+		mt76_txq_schedule_all(ext_phy);
+
+	mt76_worker_disable(&dev->mt76.tx_worker);
+	mt76_for_each_q_rx(&dev->mt76, i)
+		napi_disable(&dev->mt76.napi[i]);
+	napi_disable(&dev->mt76.tx_napi);
+
+	mt7615_mutex_acquire(dev);
+
+	mt7615_hif_int_event_trigger(dev, MT_MCU_INT_EVENT_PDMA_STOPPED);
+
+	if (mt7615_wait_reset_state(dev, MT_MCU_CMD_RESET_DONE)) {
+		mt7615_dma_reset(dev);
+
+		mt7615_tx_token_put(dev);
+		idr_init(&dev->mt76.token);
+
+		mt76_wr(dev, MT_WPDMA_MEM_RNG_ERR, 0);
+
+		mt7615_hif_int_event_trigger(dev, MT_MCU_INT_EVENT_PDMA_INIT);
+		mt7615_wait_reset_state(dev, MT_MCU_CMD_RECOVERY_DONE);
+	}
+
+	clear_bit(MT76_MCU_RESET, &dev->mphy.state);
+	clear_bit(MT76_RESET, &dev->mphy.state);
+	if (phy2)
+		clear_bit(MT76_RESET, &phy2->mt76->state);
+
+	mt76_worker_enable(&dev->mt76.tx_worker);
+
+	local_bh_disable();
+	napi_enable(&dev->mt76.tx_napi);
+	napi_schedule(&dev->mt76.tx_napi);
+
+	mt76_for_each_q_rx(&dev->mt76, i) {
+		napi_enable(&dev->mt76.napi[i]);
+		napi_schedule(&dev->mt76.napi[i]);
+	}
+	local_bh_enable();
+
+	ieee80211_wake_queues(mt76_hw(dev));
+	if (ext_phy)
+		ieee80211_wake_queues(ext_phy->hw);
+
+	mt7615_hif_int_event_trigger(dev, MT_MCU_INT_EVENT_RESET_DONE);
+	mt7615_wait_reset_state(dev, MT_MCU_CMD_NORMAL_STATE);
+
+	mt7615_update_beacons(dev);
+
+	mt7615_mutex_release(dev);
+
+	timeout = mt7615_get_macwork_timeout(dev);
+	ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mphy.mac_work,
+				     timeout);
+	if (phy2)
+		ieee80211_queue_delayed_work(ext_phy->hw,
+					     &phy2->mt76->mac_work, timeout);
+
+}