net: ethernet: mtk_eth_soc: add rxd_size to mtk_soc_data

Similar to tx counterpart, introduce rxd_size in mtk_soc_data data
structure.
This is a preliminary patch to add mt7986 ethernet support.

Tested-by: Sam Shih <sam.shih@mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mediatek/mtk_eth_soc.c

@@ -1740,7 +1740,7 @@ static int mtk_rx_alloc(struct mtk_eth *eth, int ring_no, int rx_flag)
 	}
 
 	ring->dma = dma_alloc_coherent(eth->dma_dev,
-				       rx_dma_size * sizeof(*ring->dma),
+				       rx_dma_size * eth->soc->txrx.rxd_size,
 				       &ring->phys, GFP_KERNEL);
 	if (!ring->dma)
 		return -ENOMEM;
@@ -1798,9 +1798,8 @@ static void mtk_rx_clean(struct mtk_eth *eth, struct mtk_rx_ring *ring)
 
 	if (ring->dma) {
 		dma_free_coherent(eth->dma_dev,
-				  ring->dma_size * sizeof(*ring->dma),
-				  ring->dma,
-				  ring->phys);
+				  ring->dma_size * eth->soc->txrx.rxd_size,
+				  ring->dma, ring->phys);
 		ring->dma = NULL;
 	}
 }
@@ -3388,6 +3387,7 @@ static const struct mtk_soc_data mt2701_data = {
 	.required_pctl = true,
 	.txrx = {
 		.txd_size = sizeof(struct mtk_tx_dma),
+		.rxd_size = sizeof(struct mtk_rx_dma),
 	},
 };
 
@@ -3399,6 +3399,7 @@ static const struct mtk_soc_data mt7621_data = {
 	.offload_version = 2,
 	.txrx = {
 		.txd_size = sizeof(struct mtk_tx_dma),
+		.rxd_size = sizeof(struct mtk_rx_dma),
 	},
 };
 
@@ -3411,6 +3412,7 @@ static const struct mtk_soc_data mt7622_data = {
 	.offload_version = 2,
 	.txrx = {
 		.txd_size = sizeof(struct mtk_tx_dma),
+		.rxd_size = sizeof(struct mtk_rx_dma),
 	},
 };
 
@@ -3422,6 +3424,7 @@ static const struct mtk_soc_data mt7623_data = {
 	.offload_version = 2,
 	.txrx = {
 		.txd_size = sizeof(struct mtk_tx_dma),
+		.rxd_size = sizeof(struct mtk_rx_dma),
 	},
 };
 
@@ -3433,6 +3436,7 @@ static const struct mtk_soc_data mt7629_data = {
 	.required_pctl = false,
 	.txrx = {
 		.txd_size = sizeof(struct mtk_tx_dma),
+		.rxd_size = sizeof(struct mtk_rx_dma),
 	},
 };
 
@@ -3443,6 +3447,7 @@ static const struct mtk_soc_data rt5350_data = {
 	.required_pctl = false,
 	.txrx = {
 		.txd_size = sizeof(struct mtk_tx_dma),
+		.rxd_size = sizeof(struct mtk_rx_dma),
 	},
 };
 

drivers/net/ethernet/mediatek/mtk_eth_soc.h

@@ -868,6 +868,7 @@ struct mtk_tx_dma_desc_info {
  * @required_pctl		A bool value to show whether the SoC requires
  *				the extra setup for those pins used by GMAC.
  * @txd_size			Tx DMA descriptor size.
+ * @rxd_size			Rx DMA descriptor size.
  */
 struct mtk_soc_data {
 	u32             ana_rgc3;
@@ -878,6 +879,7 @@ struct mtk_soc_data {
 	netdev_features_t hw_features;
 	struct {
 		u32	txd_size;
+		u32	rxd_size;
 	} txrx;
 };