net: mvpp2: introduce PPv2.2 HW descriptors and adapt accessors

This commit adds the definition of the PPv2.2 HW descriptors, adjusts
the mvpp2_tx_desc and mvpp2_rx_desc structures accordingly, and adapts
the accessors to work on both PPv2.1 and PPv2.2.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

drivers/net/mvpp2.c

@@ -825,18 +825,42 @@ struct mvpp21_rx_desc {
 	u32 reserved8;
 };
 
+/* HW TX descriptor for PPv2.2 */
+struct mvpp22_tx_desc {
+	u32 command;
+	u8  packet_offset;
+	u8  phys_txq;
+	u16 data_size;
+	u64 reserved1;
+	u64 buf_dma_addr_ptp;
+	u64 buf_cookie_misc;
+};
+
+/* HW RX descriptor for PPv2.2 */
+struct mvpp22_rx_desc {
+	u32 status;
+	u16 reserved1;
+	u16 data_size;
+	u32 reserved2;
+	u32 reserved3;
+	u64 buf_dma_addr_key_hash;
+	u64 buf_cookie_misc;
+};
+
 /* Opaque type used by the driver to manipulate the HW TX and RX
  * descriptors
  */
 struct mvpp2_tx_desc {
 	union {
 		struct mvpp21_tx_desc pp21;
+		struct mvpp22_tx_desc pp22;
 	};
 };
 
 struct mvpp2_rx_desc {
 	union {
 		struct mvpp21_rx_desc pp21;
+		struct mvpp22_rx_desc pp22;
 	};
 };
 
@@ -1040,59 +1064,90 @@ static void mvpp2_txdesc_dma_addr_set(struct mvpp2_port *port,
 				      struct mvpp2_tx_desc *tx_desc,
 				      dma_addr_t dma_addr)
 {
-	tx_desc->pp21.buf_dma_addr = dma_addr;
+	if (port->priv->hw_version == MVPP21) {
+		tx_desc->pp21.buf_dma_addr = dma_addr;
+	} else {
+		u64 val = (u64)dma_addr;
+
+		tx_desc->pp22.buf_dma_addr_ptp &= ~GENMASK_ULL(40, 0);
+		tx_desc->pp22.buf_dma_addr_ptp |= val;
+	}
 }
 
 static void mvpp2_txdesc_size_set(struct mvpp2_port *port,
 				  struct mvpp2_tx_desc *tx_desc,
 				  size_t size)
 {
-	tx_desc->pp21.data_size = size;
+	if (port->priv->hw_version == MVPP21)
+		tx_desc->pp21.data_size = size;
+	else
+		tx_desc->pp22.data_size = size;
 }
 
 static void mvpp2_txdesc_txq_set(struct mvpp2_port *port,
 				 struct mvpp2_tx_desc *tx_desc,
 				 unsigned int txq)
 {
-	tx_desc->pp21.phys_txq = txq;
+	if (port->priv->hw_version == MVPP21)
+		tx_desc->pp21.phys_txq = txq;
+	else
+		tx_desc->pp22.phys_txq = txq;
 }
 
 static void mvpp2_txdesc_cmd_set(struct mvpp2_port *port,
 				 struct mvpp2_tx_desc *tx_desc,
 				 unsigned int command)
 {
-	tx_desc->pp21.command = command;
+	if (port->priv->hw_version == MVPP21)
+		tx_desc->pp21.command = command;
+	else
+		tx_desc->pp22.command = command;
 }
 
 static void mvpp2_txdesc_offset_set(struct mvpp2_port *port,
 				    struct mvpp2_tx_desc *tx_desc,
 				    unsigned int offset)
 {
-	tx_desc->pp21.packet_offset = offset;
+	if (port->priv->hw_version == MVPP21)
+		tx_desc->pp21.packet_offset = offset;
+	else
+		tx_desc->pp22.packet_offset = offset;
 }
 
 static dma_addr_t mvpp2_rxdesc_dma_addr_get(struct mvpp2_port *port,
 					    struct mvpp2_rx_desc *rx_desc)
 {
-	return rx_desc->pp21.buf_dma_addr;
+	if (port->priv->hw_version == MVPP21)
+		return rx_desc->pp21.buf_dma_addr;
+	else
+		return rx_desc->pp22.buf_dma_addr_key_hash & GENMASK_ULL(40, 0);
 }
 
 static unsigned long mvpp2_rxdesc_cookie_get(struct mvpp2_port *port,
 					     struct mvpp2_rx_desc *rx_desc)
 {
-	return rx_desc->pp21.buf_cookie;
+	if (port->priv->hw_version == MVPP21)
+		return rx_desc->pp21.buf_cookie;
+	else
+		return rx_desc->pp22.buf_cookie_misc & GENMASK_ULL(40, 0);
 }
 
 static size_t mvpp2_rxdesc_size_get(struct mvpp2_port *port,
 				    struct mvpp2_rx_desc *rx_desc)
 {
-	return rx_desc->pp21.data_size;
+	if (port->priv->hw_version == MVPP21)
+		return rx_desc->pp21.data_size;
+	else
+		return rx_desc->pp22.data_size;
 }
 
 static u32 mvpp2_rxdesc_status_get(struct mvpp2_port *port,
 				   struct mvpp2_rx_desc *rx_desc)
 {
-	return rx_desc->pp21.status;
+	if (port->priv->hw_version == MVPP21)
+		return rx_desc->pp21.status;
+	else
+		return rx_desc->pp22.status;
 }
 
 static void mvpp2_txq_inc_get(struct mvpp2_txq_pcpu *txq_pcpu)