[PATCH] fec: use dma_alloc_coherent for descriptor ring
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: 2009-01-29 09:06:11
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Greg Ungerer <redacted> --- drivers/net/fec.c | 14 +++++++++----- 1 files changed, 9 insertions(+), 5 deletions(-)
diff --git a/drivers/net/fec.c b/drivers/net/fec.c
index 1087c4d..46a441a 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;
--
1.5.6.5