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authorSascha Hauer <s.hauer@pengutronix.de>2009-01-28 23:03:07 +0000
committerDavid S. Miller <davem@davemloft.net>2009-02-01 00:58:23 -0800
commit4661e75b9d7bb12bcbe9be8bbf40ebf0845879a9 (patch)
tree6a94e7e6ff9d3fcf99efb1556692bf3eddffd5d5 /drivers/net/fec.c
parent6989f5122f84046ba286efe8ce8be2fec42a1b7c (diff)
downloadblackbird-op-linux-4661e75b9d7bb12bcbe9be8bbf40ebf0845879a9.tar.gz
blackbird-op-linux-4661e75b9d7bb12bcbe9be8bbf40ebf0845879a9.zip
fec: use dma_alloc_coherent for descriptor ring
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/fec.c')
-rw-r--r--drivers/net/fec.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/net/fec.c b/drivers/net/fec.c
index 1087c4da84a5..46a441a9c644 100644
--- a/drivers/net/fec.c
+++ b/drivers/net/fec.c
@@ -186,6 +186,7 @@ struct fec_enet_private {
/* CPM dual port RAM relative addresses.
*/
+ dma_addr_t bd_dma;
cbd_t *rx_bd_base; /* Address of Rx and Tx buffers. */
cbd_t *tx_bd_base;
cbd_t *cur_rx, *cur_tx; /* The next free ring entry */
@@ -2107,7 +2108,8 @@ int __init fec_enet_init(struct net_device *dev)
/* Allocate memory for buffer descriptors.
*/
- mem_addr = __get_free_page(GFP_KERNEL);
+ mem_addr = (unsigned long)dma_alloc_coherent(NULL, PAGE_SIZE,
+ &fep->bd_dma, GFP_KERNEL);
if (mem_addr == 0) {
printk("FEC: allocate descriptor memory failed?\n");
return -ENOMEM;
@@ -2202,8 +2204,9 @@ int __init fec_enet_init(struct net_device *dev)
/* Set receive and transmit descriptor base.
*/
- fecp->fec_r_des_start = __pa((uint)(fep->rx_bd_base));
- fecp->fec_x_des_start = __pa((uint)(fep->tx_bd_base));
+ fecp->fec_r_des_start = fep->bd_dma;
+ fecp->fec_x_des_start = (unsigned long)fep->bd_dma + sizeof(cbd_t)
+ * RX_RING_SIZE;
/* Install our interrupt handlers. This varies depending on
* the architecture.
@@ -2291,8 +2294,9 @@ fec_restart(struct net_device *dev, int duplex)
/* Set receive and transmit descriptor base.
*/
- fecp->fec_r_des_start = __pa((uint)(fep->rx_bd_base));
- fecp->fec_x_des_start = __pa((uint)(fep->tx_bd_base));
+ fecp->fec_r_des_start = fep->bd_dma;
+ fecp->fec_x_des_start = (unsigned long)fep->bd_dma + sizeof(cbd_t)
+ * RX_RING_SIZE;
fep->dirty_tx = fep->cur_tx = fep->tx_bd_base;
fep->cur_rx = fep->rx_bd_base;
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