net: ethernet: mediatek: split tx and rx fields in mtk_soc_data struct

Split tx and rx fields in mtk_soc_data struct. This is a preliminary
patch to roll back to ADMAv1 for MT7986 and MT7981 SoC in order to fix a
hw hang if the device receives a corrupted packet when using ADMAv2.0.

Fixes: 197c9e9b ("net: ethernet: mtk_eth_soc: introduce support for mt7986 chipset")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Link: https://lore.kernel.org/r/70a799b1f060ec2f57883e88ccb420ac0fb0abb5.1715164770.git.daniel@makrotopia.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/mediatek/mtk_eth_soc.h

@@ -327,8 +327,8 @@
 /* QDMA descriptor txd3 */
 #define TX_DMA_OWNER_CPU	BIT(31)
 #define TX_DMA_LS0		BIT(30)
-#define TX_DMA_PLEN0(x)		(((x) & eth->soc->txrx.dma_max_len) << eth->soc->txrx.dma_len_offset)
-#define TX_DMA_PLEN1(x)		((x) & eth->soc->txrx.dma_max_len)
+#define TX_DMA_PLEN0(x)		(((x) & eth->soc->tx.dma_max_len) << eth->soc->tx.dma_len_offset)
+#define TX_DMA_PLEN1(x)		((x) & eth->soc->tx.dma_max_len)
 #define TX_DMA_SWC		BIT(14)
 #define TX_DMA_PQID		GENMASK(3, 0)
 #define TX_DMA_ADDR64_MASK	GENMASK(3, 0)
@@ -348,8 +348,8 @@
 /* QDMA descriptor rxd2 */
 #define RX_DMA_DONE		BIT(31)
 #define RX_DMA_LSO		BIT(30)
-#define RX_DMA_PREP_PLEN0(x)	(((x) & eth->soc->txrx.dma_max_len) << eth->soc->txrx.dma_len_offset)
-#define RX_DMA_GET_PLEN0(x)	(((x) >> eth->soc->txrx.dma_len_offset) & eth->soc->txrx.dma_max_len)
+#define RX_DMA_PREP_PLEN0(x)	(((x) & eth->soc->rx.dma_max_len) << eth->soc->rx.dma_len_offset)
+#define RX_DMA_GET_PLEN0(x)	(((x) >> eth->soc->rx.dma_len_offset) & eth->soc->rx.dma_max_len)
 #define RX_DMA_VTAG		BIT(15)
 #define RX_DMA_ADDR64_MASK	GENMASK(3, 0)
 #if IS_ENABLED(CONFIG_64BIT)
@@ -1153,10 +1153,9 @@ struct mtk_reg_map {
  * @foe_entry_size		Foe table entry size.
  * @has_accounting		Bool indicating support for accounting of
  *				offloaded flows.
- * @txd_size			Tx DMA descriptor size.
- * @rxd_size			Rx DMA descriptor size.
- * @rx_irq_done_mask		Rx irq done register mask.
- * @rx_dma_l4_valid		Rx DMA valid register mask.
+ * @desc_size			Tx/Rx DMA descriptor size.
+ * @irq_done_mask		Rx irq done register mask.
+ * @dma_l4_valid		Rx DMA valid register mask.
  * @dma_max_len			Max DMA tx/rx buffer length.
  * @dma_len_offset		Tx/Rx DMA length field offset.
  */
@@ -1174,13 +1173,17 @@ struct mtk_soc_data {
 	bool		has_accounting;
 	bool		disable_pll_modes;
 	struct {
-		u32	txd_size;
-		u32	rxd_size;
-		u32	rx_irq_done_mask;
-		u32	rx_dma_l4_valid;
+		u32	desc_size;
 		u32	dma_max_len;
 		u32	dma_len_offset;
-	} txrx;
+	} tx;
+	struct {
+		u32	desc_size;
+		u32	irq_done_mask;
+		u32	dma_l4_valid;
+		u32	dma_max_len;
+		u32	dma_len_offset;
+	} rx;
 };
 
 #define MTK_DMA_MONITOR_TIMEOUT		msecs_to_jiffies(1000)