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gianfar: Move tbase/rbase initialization to gfar_init_mac()

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For hibernation we want to call gfar_init_mac() without need to
free/allocate_skb_resources sequence, so save the DMA address into a
private struct, and move tbase/rbase initialization to gfar_init_mac().

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Anton Vorontsov 2009-10-12 06:00:36 +00:00 committed by David S. Miller
parent 826aa4a056
commit 32c513bca0
2 changed files with 9 additions and 9 deletions
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17
drivers/net/gianfar.c
View file

@ -151,17 +151,15 @@ static int gfar_alloc_skb_resources(struct net_device *ndev)
{
struct txbd8 *txbdp;
struct rxbd8 *rxbdp;
dma_addr_t addr = 0;
void *vaddr;
int i;
struct gfar_private *priv = netdev_priv(ndev);
struct device *dev = &priv->ofdev->dev;
struct gfar __iomem *regs = priv->regs;
/* Allocate memory for the buffer descriptors */
vaddr = dma_alloc_coherent(dev, sizeof(*txbdp) * priv->tx_ring_size +
sizeof(*rxbdp) * priv->rx_ring_size,
&addr, GFP_KERNEL);
&priv->tx_bd_dma_base, GFP_KERNEL);
if (!vaddr) {
if (netif_msg_ifup(priv))
pr_err("%s: Could not allocate buffer descriptors!\n",
@ -171,14 +169,9 @@ static int gfar_alloc_skb_resources(struct net_device *ndev)
priv->tx_bd_base = vaddr;
/* enet DMA only understands physical addresses */
gfar_write(&regs->tbase0, addr);
/* Start the rx descriptor ring where the tx ring leaves off */
addr = addr + sizeof(*txbdp) * priv->tx_ring_size;
vaddr = vaddr + sizeof(*txbdp) * priv->tx_ring_size;
priv->rx_bd_base = vaddr;
gfar_write(&regs->rbase0, addr);
/* Setup the skbuff rings */
priv->tx_skbuff = kmalloc(sizeof(*priv->tx_skbuff) *
@ -256,6 +249,12 @@ static void gfar_init_mac(struct net_device *ndev)
u32 tctrl = 0;
u32 attrs = 0;
/* enet DMA only understands physical addresses */
gfar_write(&regs->tbase0, priv->tx_bd_dma_base);
gfar_write(&regs->rbase0, priv->tx_bd_dma_base +
sizeof(*priv->tx_bd_base) *
priv->tx_ring_size);
/* Configure the coalescing support */
gfar_write(&regs->txic, 0);
if (priv->txcoalescing)
@ -1060,7 +1059,7 @@ static void free_skb_resources(struct gfar_private *priv)
dma_free_coherent(dev, sizeof(*txbdp) * priv->tx_ring_size +
sizeof(*rxbdp) * priv->rx_ring_size,
priv->tx_bd_base, gfar_read(&priv->regs->tbase0));
priv->tx_bd_base, priv->tx_bd_dma_base);
}
void gfar_start(struct net_device *dev)

1
drivers/net/gianfar.h
View file

@ -726,6 +726,7 @@ struct gfar_private {
unsigned long txic;
/* Buffer descriptor pointers */
dma_addr_t tx_bd_dma_base;
struct txbd8 *tx_bd_base; /* First tx buffer descriptor */
struct txbd8 *cur_tx; /* Next free ring entry */
struct txbd8 *dirty_tx; /* First buffer in line