[PATCH] net: dw_eth_qos: Add 64-bit addressing

[Ley Foon Tan]

Set upper 32bit address for DMA descriptors and buffer address to support
64-bit addressing.

Signed-off-by: Ley Foon Tan <leyfoon.tan at starfivetech.com>
---
 drivers/net/dwc_eth_qos.c | 36 ++++++++++++++++++++----------------
 1 file changed, 20 insertions(+), 16 deletions(-)

diff --git a/drivers/net/dwc_eth_qos.c b/drivers/net/dwc_eth_qos.c
index afc47b56ff..a21dbbda72 100644
--- a/drivers/net/dwc_eth_qos.c
+++ b/drivers/net/dwc_eth_qos.c
@@ -745,6 +745,7 @@ static int eqos_start(struct udevice *dev)
 	u32 val, tx_fifo_sz, rx_fifo_sz, tqs, rqs, pbl;
 	ulong last_rx_desc;
 	ulong desc_pad;
+	ulong addr64;
 
 	debug("%s(dev=%p):\n", __func__, dev);
 
@@ -1008,25 +1009,25 @@ static int eqos_start(struct udevice *dev)
 
 	for (i = 0; i < EQOS_DESCRIPTORS_RX; i++) {
 		struct eqos_desc *rx_desc = eqos_get_desc(eqos, i, true);
-		rx_desc->des0 = (u32)(ulong)(eqos->rx_dma_buf +
-					     (i * EQOS_MAX_PACKET_SIZE));
+
+		addr64 = (ulong)(eqos->rx_dma_buf + (i * EQOS_MAX_PACKET_SIZE));
+		rx_desc->des0 = lower_32_bits(addr64);
+		rx_desc->des1 = upper_32_bits(addr64);
 		rx_desc->des3 = EQOS_DESC3_OWN | EQOS_DESC3_BUF1V;
 		mb();
 		eqos->config->ops->eqos_flush_desc(rx_desc);
-		eqos->config->ops->eqos_inval_buffer(eqos->rx_dma_buf +
-						(i * EQOS_MAX_PACKET_SIZE),
-						EQOS_MAX_PACKET_SIZE);
+		eqos->config->ops->eqos_inval_buffer((void *)addr64, EQOS_MAX_PACKET_SIZE);
 	}
 
-	writel(0, &eqos->dma_regs->ch0_txdesc_list_haddress);
-	writel((ulong)eqos_get_desc(eqos, 0, false),
-		&eqos->dma_regs->ch0_txdesc_list_address);
+	addr64 = (ulong)eqos_get_desc(eqos, 0, false);
+	writel(upper_32_bits(addr64), &eqos->dma_regs->ch0_txdesc_list_haddress);
+	writel(lower_32_bits(addr64), &eqos->dma_regs->ch0_txdesc_list_address);
 	writel(EQOS_DESCRIPTORS_TX - 1,
 	       &eqos->dma_regs->ch0_txdesc_ring_length);
 
-	writel(0, &eqos->dma_regs->ch0_rxdesc_list_haddress);
-	writel((ulong)eqos_get_desc(eqos, 0, true),
-		&eqos->dma_regs->ch0_rxdesc_list_address);
+	addr64 = (ulong)eqos_get_desc(eqos, 0, true);
+	writel(upper_32_bits(addr64), &eqos->dma_regs->ch0_rxdesc_list_haddress);
+	writel(lower_32_bits(addr64), &eqos->dma_regs->ch0_rxdesc_list_address);
 	writel(EQOS_DESCRIPTORS_RX - 1,
 	       &eqos->dma_regs->ch0_rxdesc_ring_length);
 
@@ -1131,8 +1132,8 @@ static int eqos_send(struct udevice *dev, void *packet, int length)
 	eqos->tx_desc_idx++;
 	eqos->tx_desc_idx %= EQOS_DESCRIPTORS_TX;
 
-	tx_desc->des0 = (ulong)eqos->tx_dma_buf;
-	tx_desc->des1 = 0;
+	tx_desc->des0 = lower_32_bits((ulong)eqos->tx_dma_buf);
+	tx_desc->des1 = upper_32_bits((ulong)eqos->tx_dma_buf);
 	tx_desc->des2 = length;
 	/*
 	 * Make sure that if HW sees the _OWN write below, it will see all the
@@ -1205,14 +1206,17 @@ static int eqos_free_pkt(struct udevice *dev, uchar *packet, int length)
 		for (idx = eqos->rx_desc_idx - idx_mask;
 		     idx <= eqos->rx_desc_idx;
 		     idx++) {
+			ulong addr64;
+
 			rx_desc = eqos_get_desc(eqos, idx, true);
 			rx_desc->des0 = 0;
+			rx_desc->des1 = 0;
 			mb();
 			eqos->config->ops->eqos_flush_desc(rx_desc);
 			eqos->config->ops->eqos_inval_buffer(packet, length);
-			rx_desc->des0 = (u32)(ulong)(eqos->rx_dma_buf +
-					     (idx * EQOS_MAX_PACKET_SIZE));
-			rx_desc->des1 = 0;
+			addr64 = (ulong)(eqos->rx_dma_buf + (idx * EQOS_MAX_PACKET_SIZE));
+			rx_desc->des0 = lower_32_bits(addr64);
+			rx_desc->des1 = upper_32_bits(addr64);
 			rx_desc->des2 = 0;
 			/*
 			 * Make sure that if HW sees the _OWN write below,
-- 
2.25.1