1 files changed, 134 insertions, 0 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mcu.c b/drivers/net/wireless/mediatek/mt76/mcu.c
new file mode 100644
index 000000000..a8cafa39a
--- /dev/null
+++ b/drivers/net/wireless/mediatek/mt76/mcu.c
@@ -0,0 +1,134 @@
+// SPDX-License-Identifier: ISC
+/*
+ * Copyright (C) 2019 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
+ */
+
+#include "mt76.h"
+
+struct sk_buff *
+__mt76_mcu_msg_alloc(struct mt76_dev *dev, const void *data,
+		     int len, int data_len, gfp_t gfp)
+{
+	const struct mt76_mcu_ops *ops = dev->mcu_ops;
+	struct sk_buff *skb;
+
+	len = max_t(int, len, data_len);
+	len = ops->headroom + len + ops->tailroom;
+
+	skb = alloc_skb(len, gfp);
+	if (!skb)
+		return NULL;
+
+	memset(skb->head, 0, len);
+	skb_reserve(skb, ops->headroom);
+
+	if (data && data_len)
+		skb_put_data(skb, data, data_len);
+
+	return skb;
+}
+EXPORT_SYMBOL_GPL(__mt76_mcu_msg_alloc);
+
+struct sk_buff *mt76_mcu_get_response(struct mt76_dev *dev,
+				      unsigned long expires)
+{
+	unsigned long timeout;
+
+	if (!time_is_after_jiffies(expires))
+		return NULL;
+
+	timeout = expires - jiffies;
+	wait_event_timeout(dev->mcu.wait,
+			   (!skb_queue_empty(&dev->mcu.res_q) ||
+			    test_bit(MT76_MCU_RESET, &dev->phy.state)),
+			   timeout);
+	return skb_dequeue(&dev->mcu.res_q);
+}
+EXPORT_SYMBOL_GPL(mt76_mcu_get_response);
+
+void mt76_mcu_rx_event(struct mt76_dev *dev, struct sk_buff *skb)
+{
+	skb_queue_tail(&dev->mcu.res_q, skb);
+	wake_up(&dev->mcu.wait);
+}
+EXPORT_SYMBOL_GPL(mt76_mcu_rx_event);
+
+int mt76_mcu_send_and_get_msg(struct mt76_dev *dev, int cmd, const void *data,
+			      int len, bool wait_resp, struct sk_buff **ret_skb)
+{
+	struct sk_buff *skb;
+
+	if (dev->mcu_ops->mcu_send_msg)
+		return dev->mcu_ops->mcu_send_msg(dev, cmd, data, len, wait_resp);
+
+	skb = mt76_mcu_msg_alloc(dev, data, len);
+	if (!skb)
+		return -ENOMEM;
+
+	return mt76_mcu_skb_send_and_get_msg(dev, skb, cmd, wait_resp, ret_skb);
+}
+EXPORT_SYMBOL_GPL(mt76_mcu_send_and_get_msg);
+
+int mt76_mcu_skb_send_and_get_msg(struct mt76_dev *dev, struct sk_buff *skb,
+				  int cmd, bool wait_resp,
+				  struct sk_buff **ret_skb)
+{
+	unsigned long expires;
+	int ret, seq;
+
+	if (ret_skb)
+		*ret_skb = NULL;
+
+	mutex_lock(&dev->mcu.mutex);
+
+	ret = dev->mcu_ops->mcu_skb_send_msg(dev, skb, cmd, &seq);
+	if (ret < 0)
+		goto out;
+
+	if (!wait_resp) {
+		ret = 0;
+		goto out;
+	}
+
+	expires = jiffies + dev->mcu.timeout;
+
+	do {
+		skb = mt76_mcu_get_response(dev, expires);
+		ret = dev->mcu_ops->mcu_parse_response(dev, cmd, skb, seq);
+		if (!ret && ret_skb)
+			*ret_skb = skb;
+		else
+			dev_kfree_skb(skb);
+	} while (ret == -EAGAIN);
+
+out:
+	mutex_unlock(&dev->mcu.mutex);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(mt76_mcu_skb_send_and_get_msg);
+
+int __mt76_mcu_send_firmware(struct mt76_dev *dev, int cmd, const void *data,
+			     int len, int max_len)
+{
+	int err, cur_len;
+
+	while (len > 0) {
+		cur_len = min_t(int, max_len, len);
+
+		err = mt76_mcu_send_msg(dev, cmd, data, cur_len, false);
+		if (err)
+			return err;
+
+		data += cur_len;
+		len -= cur_len;
+
+		if (dev->queue_ops->tx_cleanup)
+			dev->queue_ops->tx_cleanup(dev,
+						   dev->q_mcu[MT_MCUQ_FWDL],
+						   false);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(__mt76_mcu_send_firmware);