[PATCH v2 13/27] net: arc-emac: convert to streaming DMA ops

[Lucas Stach]

Move to the common streaming DMA ops in order to get rid of
the direct usage of the ARM MMU functions for the cache
maintenance.

Signed-off-by: Lucas Stach <dev at lynxeye.de>
---
 drivers/net/arc_emac.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/net/arc_emac.c b/drivers/net/arc_emac.c
index 40516a5..2d6215e 100644
--- a/drivers/net/arc_emac.c
+++ b/drivers/net/arc_emac.c
@@ -16,7 +16,6 @@
  * GNU General Public License for more details.
  */
 
-#include <asm/mmu.h>
 #include <clock.h>
 #include <common.h>
 #include <dma.h>
@@ -195,6 +194,8 @@ static int arc_emac_open(struct eth_device *edev)
 		rxbd->data = cpu_to_le32(rxbuf);
 
 		/* Return ownership to EMAC */
+		dma_sync_single_for_device((unsigned long)rxbuf, PKTSIZE,
+					   DMA_FROM_DEVICE);
 		rxbd->info = cpu_to_le32(FOR_EMAC | PKTSIZE);
 
 		*last_rx_bd = (*last_rx_bd + 1) % RX_BD_NUM;
@@ -244,7 +245,7 @@ static int arc_emac_send(struct eth_device *edev, void *data, int length)
 		length = EMAC_ZLEN;
 	}
 
-	dma_flush_range((unsigned long)data, (unsigned long)data + length);
+	dma_sync_single_for_device((unsigned long)data, length, DMA_TO_DEVICE);
 
 	bd->data = cpu_to_le32(data);
 	bd->info = cpu_to_le32(FOR_EMAC | FIRST_OR_LAST_MASK | length);
@@ -253,6 +254,8 @@ static int arc_emac_send(struct eth_device *edev, void *data, int length)
 	ret = wait_on_timeout(20 * MSECOND,
 			      (arc_reg_get(priv, R_STATUS) & TXINT_MASK) != 0);
 
+	dma_sync_single_for_cpu((unsigned long)data, length, DMA_TO_DEVICE);
+
 	if (ret) {
 		dev_err(&edev->dev, "transmit timeout\n");
 		return ret;
@@ -294,18 +297,19 @@ static int arc_emac_recv(struct eth_device *edev)
 			printk(KERN_DEBUG "incomplete packet received\n");
 
 			/* Return ownership to EMAC */
-			rxbd->info = cpu_to_le32(FOR_EMAC | PKTSIZE);
 			continue;
 		}
 
 		pktlen = info & LEN_MASK;
 
-		/* invalidate current receive buffer */
-		dma_inv_range((unsigned long)rxbd->data,
-			      (unsigned long)rxbd->data + pktlen);
+		dma_sync_single_for_cpu((unsigned long)rxbd->data, pktlen,
+					DMA_FROM_DEVICE);
 
 		net_receive(edev, (unsigned char *)rxbd->data, pktlen);
 
+		dma_sync_single_for_device((unsigned long)rxbd->data, pktlen,
+					   DMA_FROM_DEVICE);
+
 		rxbd->info = cpu_to_le32(FOR_EMAC | PKTSIZE);
 	}
 
-- 
2.1.0