[U-Boot] [PATCH v2 5/7] net/ethoc: don't mix virtual and physical addresses

[Max Filippov]

Addresses used in buffer descriptors and passed in platform data or
device tree are physical. Addresses used by CPU to access packet data
and registers are virtual. Don't mix these addresses and use virt_to_phys
for translation.

Signed-off-by: Max Filippov <jcmvbkbc at gmail.com>
Acked-by: Joe Hershberger <joe.hershberger at ni.com>
---
 drivers/net/ethoc.c | 23 +++++++++++++----------
 1 file changed, 13 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethoc.c b/drivers/net/ethoc.c
index a5c4b46..198827f 100644
--- a/drivers/net/ethoc.c
+++ b/drivers/net/ethoc.c
@@ -255,6 +255,7 @@ static int ethoc_init_ring(struct ethoc *priv)
 
 	/* setup transmission buffers */
 	bd.stat = TX_BD_IRQ | TX_BD_CRC;
+	bd.addr = 0;
 
 	for (i = 0; i < priv->num_tx; i++) {
 		if (i == priv->num_tx - 1)
@@ -266,11 +267,12 @@ static int ethoc_init_ring(struct ethoc *priv)
 	bd.stat = RX_BD_EMPTY | RX_BD_IRQ;
 
 	for (i = 0; i < priv->num_rx; i++) {
-		bd.addr = (u32)net_rx_packets[i];
+		bd.addr = virt_to_phys(net_rx_packets[i]);
 		if (i == priv->num_rx - 1)
 			bd.stat |= RX_BD_WRAP;
 
-		flush_dcache_range(bd.addr, bd.addr + PKTSIZE_ALIGN);
+		flush_dcache_range((ulong)net_rx_packets[i],
+				   (ulong)net_rx_packets[i] + PKTSIZE_ALIGN);
 		ethoc_write_bd(priv, priv->num_tx + i, &bd);
 	}
 
@@ -351,10 +353,10 @@ static int ethoc_update_rx_stats(struct ethoc_bd *bd)
 
 static int ethoc_rx_common(struct ethoc *priv, uchar **packetp)
 {
-	u32 entry;
 	struct ethoc_bd bd;
+	u32 i = priv->cur_rx % priv->num_rx;
+	u32 entry = priv->num_tx + i;
 
-	entry = priv->num_tx + (priv->cur_rx % priv->num_rx);
 	ethoc_read_bd(priv, entry, &bd);
 	if (bd.stat & RX_BD_EMPTY)
 		return -EAGAIN;
@@ -365,7 +367,7 @@ static int ethoc_rx_common(struct ethoc *priv, uchar **packetp)
 		int size = bd.stat >> 16;
 
 		size -= 4;	/* strip the CRC */
-		*packetp = (void *)bd.addr;
+		*packetp = net_rx_packets[i];
 		return size;
 	} else {
 		return 0;
@@ -428,9 +430,9 @@ static int ethoc_send_common(struct ethoc *priv, void *packet, int length)
 		bd.stat |= TX_BD_PAD;
 	else
 		bd.stat &= ~TX_BD_PAD;
-	bd.addr = (u32)packet;
+	bd.addr = virt_to_phys(packet);
 
-	flush_dcache_range(bd.addr, bd.addr + length);
+	flush_dcache_range((ulong)packet, (ulong)packet + length);
 	bd.stat &= ~(TX_BD_STATS | TX_BD_LEN_MASK);
 	bd.stat |= TX_BD_LEN(length);
 	ethoc_write_bd(priv, entry, &bd);
@@ -463,14 +465,15 @@ static int ethoc_send_common(struct ethoc *priv, void *packet, int length)
 
 static int ethoc_free_pkt_common(struct ethoc *priv)
 {
-	u32 entry;
 	struct ethoc_bd bd;
+	u32 i = priv->cur_rx % priv->num_rx;
+	u32 entry = priv->num_tx + i;
 
-	entry = priv->num_tx + (priv->cur_rx % priv->num_rx);
 	ethoc_read_bd(priv, entry, &bd);
 
 	/* clear the buffer descriptor so it can be reused */
-	flush_dcache_range(bd.addr, bd.addr + PKTSIZE_ALIGN);
+	flush_dcache_range((ulong)net_rx_packets[i],
+			   (ulong)net_rx_packets[i] + PKTSIZE_ALIGN);
 	bd.stat &= ~RX_BD_STATS;
 	bd.stat |= RX_BD_EMPTY;
 	ethoc_write_bd(priv, entry, &bd);
-- 
2.1.4