From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Thu, 24 Nov 2022 16:22:55 +0100
Subject: [PATCH] net: ethernet: mtk_wed: add reset to tx_ring_setup callback

Introduce reset parameter to mtk_wed_tx_ring_setup signature.
This is a preliminary patch to add Wireless Ethernet Dispatcher reset
support.

Co-developed-by: Sujuan Chen <sujuan.chen@mediatek.com>
Signed-off-by: Sujuan Chen <sujuan.chen@mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
---

--- a/drivers/net/ethernet/mediatek/mtk_wed.c
+++ b/drivers/net/ethernet/mediatek/mtk_wed.c
@@ -1181,7 +1181,8 @@ mtk_wed_ring_alloc(struct mtk_wed_device
 }
 
 static int
-mtk_wed_wdma_rx_ring_setup(struct mtk_wed_device *dev, int idx, int size)
+mtk_wed_wdma_rx_ring_setup(struct mtk_wed_device *dev, int idx, int size,
+			   bool reset)
 {
 	u32 desc_size = sizeof(struct mtk_wdma_desc) * dev->hw->version;
 	struct mtk_wed_ring *wdma;
@@ -1190,8 +1191,8 @@ mtk_wed_wdma_rx_ring_setup(struct mtk_we
 		return -EINVAL;
 
 	wdma = &dev->rx_wdma[idx];
-	if (mtk_wed_ring_alloc(dev, wdma, MTK_WED_WDMA_RING_SIZE, desc_size,
-			       true))
+	if (!reset && mtk_wed_ring_alloc(dev, wdma, MTK_WED_WDMA_RING_SIZE,
+					 desc_size, true))
 		return -ENOMEM;
 
 	wdma_w32(dev, MTK_WDMA_RING_RX(idx) + MTK_WED_RING_OFS_BASE,
@@ -1389,7 +1390,7 @@ mtk_wed_start(struct mtk_wed_device *dev
 
 	for (i = 0; i < ARRAY_SIZE(dev->rx_wdma); i++)
 		if (!dev->rx_wdma[i].desc)
-			mtk_wed_wdma_rx_ring_setup(dev, i, 16);
+			mtk_wed_wdma_rx_ring_setup(dev, i, 16, false);
 
 	mtk_wed_hw_init(dev);
 	mtk_wed_configure_irq(dev, irq_mask);
@@ -1498,7 +1499,8 @@ unlock:
 }
 
 static int
-mtk_wed_tx_ring_setup(struct mtk_wed_device *dev, int idx, void __iomem *regs)
+mtk_wed_tx_ring_setup(struct mtk_wed_device *dev, int idx, void __iomem *regs,
+		      bool reset)
 {
 	struct mtk_wed_ring *ring = &dev->tx_ring[idx];
 
@@ -1517,11 +1519,12 @@ mtk_wed_tx_ring_setup(struct mtk_wed_dev
 	if (WARN_ON(idx >= ARRAY_SIZE(dev->tx_ring)))
 		return -EINVAL;
 
-	if (mtk_wed_ring_alloc(dev, ring, MTK_WED_TX_RING_SIZE,
-			       sizeof(*ring->desc), true))
+	if (!reset && mtk_wed_ring_alloc(dev, ring, MTK_WED_TX_RING_SIZE,
+					 sizeof(*ring->desc), true))
 		return -ENOMEM;
 
-	if (mtk_wed_wdma_rx_ring_setup(dev, idx, MTK_WED_WDMA_RING_SIZE))
+	if (mtk_wed_wdma_rx_ring_setup(dev, idx, MTK_WED_WDMA_RING_SIZE,
+				       reset))
 		return -ENOMEM;
 
 	ring->reg_base = MTK_WED_RING_TX(idx);
--- a/include/linux/soc/mediatek/mtk_wed.h
+++ b/include/linux/soc/mediatek/mtk_wed.h
@@ -158,7 +158,7 @@ struct mtk_wed_device {
 struct mtk_wed_ops {
 	int (*attach)(struct mtk_wed_device *dev);
 	int (*tx_ring_setup)(struct mtk_wed_device *dev, int ring,
-			     void __iomem *regs);
+			     void __iomem *regs, bool reset);
 	int (*rx_ring_setup)(struct mtk_wed_device *dev, int ring,
 			     void __iomem *regs);
 	int (*txfree_ring_setup)(struct mtk_wed_device *dev,
@@ -216,8 +216,8 @@ mtk_wed_get_rx_capa(struct mtk_wed_devic
 #define mtk_wed_device_active(_dev) !!(_dev)->ops
 #define mtk_wed_device_detach(_dev) (_dev)->ops->detach(_dev)
 #define mtk_wed_device_start(_dev, _mask) (_dev)->ops->start(_dev, _mask)
-#define mtk_wed_device_tx_ring_setup(_dev, _ring, _regs) \
-	(_dev)->ops->tx_ring_setup(_dev, _ring, _regs)
+#define mtk_wed_device_tx_ring_setup(_dev, _ring, _regs, _reset) \
+	(_dev)->ops->tx_ring_setup(_dev, _ring, _regs, _reset)
 #define mtk_wed_device_txfree_ring_setup(_dev, _regs) \
 	(_dev)->ops->txfree_ring_setup(_dev, _regs)
 #define mtk_wed_device_reg_read(_dev, _reg) \
@@ -243,7 +243,7 @@ static inline bool mtk_wed_device_active
 }
 #define mtk_wed_device_detach(_dev) do {} while (0)
 #define mtk_wed_device_start(_dev, _mask) do {} while (0)
-#define mtk_wed_device_tx_ring_setup(_dev, _ring, _regs) -ENODEV
+#define mtk_wed_device_tx_ring_setup(_dev, _ring, _regs, _reset) -ENODEV
 #define mtk_wed_device_txfree_ring_setup(_dev, _ring, _regs) -ENODEV
 #define mtk_wed_device_reg_read(_dev, _reg) 0
 #define mtk_wed_device_reg_write(_dev, _reg, _val) do {} while (0)