netdev - [PATCH net-next 04/15] net: ethernet: mtk_wed: introduce mtk_wed_wdma_get_desc

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Date: Thu, 14 Sep 2023 16:38:09 +0200
From: Lorenzo Bianconi <lorenzo@...nel.org>
To: netdev@...r.kernel.org
Cc: lorenzo.bianconi@...hat.com,
	nbd@....name,
	john@...ozen.org,
	sean.wang@...iatek.com,
	Mark-MC.Lee@...iatek.com,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	daniel@...rotopia.org,
	linux-mediatek@...ts.infradead.org,
	sujuan.chen@...iatek.com,
	robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org,
	devicetree@...r.kernel.org
Subject: [PATCH net-next 04/15] net: ethernet: mtk_wed: introduce mtk_wed_wdma_get_desc_size utility routine

This is a preliminary patch to introduce Wireless Ethernet Dispatcher
support for MT7988 SoC.

Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
---
 drivers/net/ethernet/mediatek/mtk_wed.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_wed.c b/drivers/net/ethernet/mediatek/mtk_wed.c
index ce1ca98ea1d6..ac284b1e599f 100644
--- a/drivers/net/ethernet/mediatek/mtk_wed.c
+++ b/drivers/net/ethernet/mediatek/mtk_wed.c
@@ -1245,11 +1245,20 @@ mtk_wed_ring_alloc(struct mtk_wed_device *dev, struct mtk_wed_ring *ring,
 	return 0;
 }
 
+static u32
+mtk_wed_wdma_get_desc_size(struct mtk_wed_hw *hw)
+{
+	if (mtk_wed_is_v1(hw))
+		return sizeof(struct mtk_wdma_desc);
+
+	return 2 * sizeof(struct mtk_wdma_desc);
+}
+
 static int
 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;
+	u32 desc_size = mtk_wed_wdma_get_desc_size(dev->hw);
 	struct mtk_wed_ring *wdma;
 
 	if (idx >= ARRAY_SIZE(dev->rx_wdma))
@@ -1278,7 +1287,7 @@ static int
 mtk_wed_wdma_tx_ring_setup(struct mtk_wed_device *dev, int idx, int size,
 			   bool reset)
 {
-	u32 desc_size = sizeof(struct mtk_wdma_desc) * dev->hw->version;
+	u32 desc_size = mtk_wed_wdma_get_desc_size(dev->hw);
 	struct mtk_wed_ring *wdma;
 
 	if (idx >= ARRAY_SIZE(dev->tx_wdma))
-- 
2.41.0