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Code

ramips: raeth: add rx_dma array to store the DMA address of the rx packets

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@30445 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
juhosg 2012-02-11 15:12:02 +00:00
parent bbc71f5154
commit 606588b4e9
2 changed files with 17 additions and 10 deletions
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26
target/linux/ramips/files/drivers/net/ramips.c
View File

@ -172,6 +172,7 @@ ramips_alloc_dma(struct raeth_priv *re)
memset(re->rx, 0, sizeof(struct ramips_rx_dma) * NUM_RX_DESC);
for (i = 0; i < NUM_RX_DESC; i++) {
dma_addr_t dma_addr;
struct sk_buff *new_skb = dev_alloc_skb(MAX_RX_LENGTH +
NET_IP_ALIGN);
@ -179,10 +180,11 @@ ramips_alloc_dma(struct raeth_priv *re)
goto err_cleanup;
skb_reserve(new_skb, NET_IP_ALIGN);
re->rx[i].rxd1 = dma_map_single(NULL,
new_skb->data,
MAX_RX_LENGTH,
DMA_FROM_DEVICE);
dma_addr = dma_map_single(NULL, new_skb->data,
MAX_RX_LENGTH, DMA_FROM_DEVICE);
re->rx_dma[i] = dma_addr;
re->rx[i].rxd1 = (unsigned int) re->rx_dma[i];
re->rx[i].rxd2 |= RX_DMA_LSO;
re->rx_skb[i] = new_skb;
}
@ -282,8 +284,9 @@ ramips_eth_rx_hw(unsigned long ptr)
new_skb = netdev_alloc_skb(dev, MAX_RX_LENGTH + NET_IP_ALIGN);
/* Reuse the buffer on allocation failures */
if (new_skb) {
/* TODO: convert to use dma_addr_t */
dma_unmap_single(NULL, priv->rx[rx].rxd1, MAX_RX_LENGTH,
dma_addr_t dma_addr;
dma_unmap_single(NULL, priv->rx_dma[rx], MAX_RX_LENGTH,
DMA_FROM_DEVICE);
skb_put(rx_skb, pktlen);
@ -296,10 +299,13 @@ ramips_eth_rx_hw(unsigned long ptr)
priv->rx_skb[rx] = new_skb;
skb_reserve(new_skb, NET_IP_ALIGN);
priv->rx[rx].rxd1 = dma_map_single(NULL,
new_skb->data,
MAX_RX_LENGTH,
DMA_FROM_DEVICE);
dma_addr = dma_map_single(NULL,
new_skb->data,
MAX_RX_LENGTH,
DMA_FROM_DEVICE);
priv->rx_dma[rx] = dma_addr;
priv->rx[rx].rxd1 = (unsigned int) dma_addr;
} else {
dev->stats.rx_dropped++;
}

1
target/linux/ramips/files/drivers/net/ramips_eth.h
View File

@ -219,6 +219,7 @@ struct raeth_priv
struct tasklet_struct rx_tasklet;
struct ramips_rx_dma *rx;
struct sk_buff *rx_skb[NUM_RX_DESC];
dma_addr_t rx_dma[NUM_RX_DESC];
dma_addr_t tx_desc_dma;
struct tasklet_struct tx_housekeeping_tasklet;