From 158ad06239880c0cc64173730ef35906292bbafd Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Fri, 20 Mar 2015 20:14:38 +0100
Subject: [PATCH] dma: add a mt76_dma_ops abstraction struct to prepare for
 more chipset support

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
---
 dma.c  |  9 ++++++++-
 mt76.h | 12 +++++++++---
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/dma.c b/dma.c
index 41b3c983..8e73d0dc 100644
--- a/dma.c
+++ b/dma.c
@@ -203,7 +203,8 @@ int __mt76_tx_queue_skb(struct mt76_dev *dev, enum mt76_txq_id qid,
 	return 0;
 }
 
-int mt76_tx_queue_skb(struct mt76_dev *dev, struct mt76_queue *q,
+static int
+mt76_dma_tx_queue_skb(struct mt76_dev *dev, struct mt76_queue *q,
 		      struct sk_buff *skb, struct mt76_wcid *wcid,
 		      struct ieee80211_sta *sta)
 {
@@ -517,6 +518,10 @@ mt76_rx_tasklet(unsigned long data)
 	mt76_irq_enable(dev, MT_INT_RX_DONE(1));
 }
 
+static const struct mt76_dma_ops dma_ops = {
+	.queue_skb = mt76_dma_tx_queue_skb,
+};
+
 int mt76_dma_init(struct mt76_dev *dev)
 {
 	static const u8 wmm_queue_map[] = {
@@ -528,6 +533,8 @@ int mt76_dma_init(struct mt76_dev *dev)
 	int ret;
 	int i;
 
+	dev->dma_ops = &dma_ops;
+
 	init_waitqueue_head(&dev->mcu.wait);
 	skb_queue_head_init(&dev->mcu.res_q);
 
diff --git a/mt76.h b/mt76.h
index b8c2ad13..a6afafd6 100644
--- a/mt76.h
+++ b/mt76.h
@@ -141,6 +141,12 @@ struct mt76_hw_cap {
 	bool has_5ghz;
 };
 
+struct mt76_dma_ops {
+	int (*queue_skb)(struct mt76_dev *dev, struct mt76_queue *q,
+			 struct sk_buff *skb, struct mt76_wcid *wcid,
+			 struct ieee80211_sta *sta);
+};
+
 struct mt76_dev {
 	struct ieee80211_hw *hw;
 	struct device *dev;
@@ -151,6 +157,8 @@ struct mt76_dev {
 
 	struct mutex mutex;
 
+	const struct mt76_dma_ops *dma_ops;
+
 	const u16 *beacon_offsets;
 	unsigned long wcid_mask[256 / BITS_PER_LONG];
 
@@ -325,9 +333,7 @@ void mt76_rx(struct mt76_dev *dev, struct sk_buff *skb);
 int __mt76_tx_queue_skb(struct mt76_dev *dev, enum mt76_txq_id qid,
 			struct sk_buff *skb, u32 tx_info);
 
-int mt76_tx_queue_skb(struct mt76_dev *dev, struct mt76_queue *q,
-		      struct sk_buff *skb, struct mt76_wcid *wcid,
-		      struct ieee80211_sta *sta);
+#define mt76_tx_queue_skb(dev, ...) dev->dma_ops->queue_skb(dev, __VA_ARGS__)
 
 void mt76_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control,
 	     struct sk_buff *skb);