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net: sh-eth: Add cache writeback control after setting bit of DMA descriptor 

A bit field of DMA descriptor is on memory area of DMA. If we set data
to bit of DMA descriptor, we must be writeback data of DMA descriptor.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
utp
Nobuhiro Iwamatsu 2014-11-04 09:15:48 +09:00 committed by Nobuhiro Iwamatsu
parent 000889cdb9
commit f7ca1f76fd
1 changed files with 8 additions and 2 deletions
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10
drivers/net/sh_eth.c
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@ -2,9 +2,9 @@
* sh_eth.c - Driver for Renesas ethernet controler.
*
* Copyright (C) 2008, 2011 Renesas Solutions Corp.
* Copyright (c) 2008, 2011 Nobuhiro Iwamatsu
* Copyright (c) 2008, 2011, 2014 2014 Nobuhiro Iwamatsu
* Copyright (c) 2007 Carlos Munoz <carlos@kenati.com>
* Copyright (C) 2013 Renesas Electronics Corporation
* Copyright (C) 2013, 2014 Renesas Electronics Corporation
*
* SPDX-License-Identifier: GPL-2.0+
*/
@ -83,6 +83,8 @@ int sh_eth_send(struct eth_device *dev, void *packet, int len)
else
port_info->tx_desc_cur->td0 = TD_TACT | TD_TFP;
flush_cache_wback(port_info->tx_desc_cur, sizeof(struct tx_desc_s));
/* Restart the transmitter if disabled */
if (!(sh_eth_read(eth, EDTRR) & EDTRR_TRNS))
sh_eth_write(eth, EDTRR_TRNS, EDTRR);
@ -133,6 +135,10 @@ int sh_eth_recv(struct eth_device *dev)
port_info->rx_desc_cur->rd0 = RD_RACT | RD_RDLE;
else
port_info->rx_desc_cur->rd0 = RD_RACT;
flush_cache_wback(port_info->rx_desc_cur,
sizeof(struct rx_desc_s));
/* Point to the next descriptor */
port_info->rx_desc_cur++;
if (port_info->rx_desc_cur >=