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

Message ID 1470410781-7944-6-git-send-email-jcmvbkbc@gmail.com
State Accepted
Commit 02a888b
Delegated to: Joe Hershberger
Headers show

Commit Message

Max Filippov Aug. 5, 2016, 3:26 p.m. UTC 
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@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
---
 drivers/net/ethoc.c | 23 +++++++++++++----------
 1 file changed, 13 insertions(+), 10 deletions(-)

Comments

Joe Hershberger Aug. 15, 2016, 8:33 p.m. UTC | #1 
Hi Max,

https://patchwork.ozlabs.org/patch/656242/ was applied to u-boot-net.git.

Thanks!
-Joe
diff mbox

Patch

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);