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Date: Sat, 9 Jul 2011 19:17:52 +0200 (CEST)
From: Michał Mirosław <mirq-linux@...e.qmqm.pl>
To: netdev@...r.kernel.org
Cc: Don Fry <pcnet32@...ntier.com>
Subject: [PATCH 09/21] net: pcnet32: use common rx_copybreak handling [strict
refill!]
Also use netdev_alloc_skb_ip_align() to make code correct (skb->dev
is needed in new common path) and easier to follow.
Signed-off-by: Michał Mirosław <mirq-linux@...e.qmqm.pl>
---
drivers/net/pcnet32.c | 52 ++++++++----------------------------------------
1 files changed, 9 insertions(+), 43 deletions(-)
diff --git a/drivers/net/pcnet32.c b/drivers/net/pcnet32.c
index 8b3090d..baae404 100644
--- a/drivers/net/pcnet32.c
+++ b/drivers/net/pcnet32.c
@@ -588,7 +588,7 @@ static void pcnet32_realloc_rx_ring(struct net_device *dev,
/* now allocate any new buffers needed */
for (; new < size; new++) {
struct sk_buff *rx_skbuff;
- new_skb_list[new] = dev_alloc_skb(PKT_BUF_SKB);
+ new_skb_list[new] = netdev_alloc_skb_ip_align(dev, PKT_BUF_SKB);
rx_skbuff = new_skb_list[new];
if (!rx_skbuff) {
/* keep the original lists and buffers */
@@ -596,7 +596,6 @@ static void pcnet32_realloc_rx_ring(struct net_device *dev,
__func__);
goto free_all_new;
}
- skb_reserve(rx_skbuff, NET_IP_ALIGN);
new_dma_addr_list[new] =
pci_map_single(lp->pci_dev, rx_skbuff->data,
@@ -1147,51 +1146,18 @@ static void pcnet32_rx_entry(struct net_device *dev,
return;
}
- if (pkt_len > rx_copybreak) {
- struct sk_buff *newskb;
-
- newskb = dev_alloc_skb(PKT_BUF_SKB);
- if (newskb) {
- skb_reserve(newskb, NET_IP_ALIGN);
- skb = lp->rx_skbuff[entry];
- pci_unmap_single(lp->pci_dev,
- lp->rx_dma_addr[entry],
- PKT_BUF_SIZE,
- PCI_DMA_FROMDEVICE);
- skb_put(skb, pkt_len);
- lp->rx_skbuff[entry] = newskb;
- lp->rx_dma_addr[entry] =
- pci_map_single(lp->pci_dev,
- newskb->data,
- PKT_BUF_SIZE,
- PCI_DMA_FROMDEVICE);
- rxp->base = cpu_to_le32(lp->rx_dma_addr[entry]);
- rx_in_place = 1;
- } else
- skb = NULL;
- } else
- skb = dev_alloc_skb(pkt_len + NET_IP_ALIGN);
+ skb = dev_skb_finish_rx_dma_refill(&lp->rx_skbuff[entry],
+ pkt_len, rx_copybreak, NET_IP_ALIGN, 0,
+ &lp->pci_dev->dev, &lp->rx_dma_addr[entry],
+ PKT_BUF_SIZE);
+ rxp->base = cpu_to_le32(lp->rx_dma_addr[entry]);
if (skb == NULL) {
netif_err(lp, drv, dev, "Memory squeeze, dropping packet\n");
dev->stats.rx_dropped++;
return;
}
- if (!rx_in_place) {
- skb_reserve(skb, NET_IP_ALIGN);
- skb_put(skb, pkt_len); /* Make room */
- pci_dma_sync_single_for_cpu(lp->pci_dev,
- lp->rx_dma_addr[entry],
- pkt_len,
- PCI_DMA_FROMDEVICE);
- skb_copy_to_linear_data(skb,
- (unsigned char *)(lp->rx_skbuff[entry]->data),
- pkt_len);
- pci_dma_sync_single_for_device(lp->pci_dev,
- lp->rx_dma_addr[entry],
- pkt_len,
- PCI_DMA_FROMDEVICE);
- }
+
dev->stats.rx_bytes += skb->len;
skb->protocol = eth_type_trans(skb, dev);
netif_receive_skb(skb);
@@ -2271,7 +2237,8 @@ static int pcnet32_init_ring(struct net_device *dev)
for (i = 0; i < lp->rx_ring_size; i++) {
struct sk_buff *rx_skbuff = lp->rx_skbuff[i];
if (rx_skbuff == NULL) {
- lp->rx_skbuff[i] = dev_alloc_skb(PKT_BUF_SKB);
+ lp->rx_skbuff[i] =
+ netdev_alloc_skb_ip_align(dev, PKT_BUF_SKB);
rx_skbuff = lp->rx_skbuff[i];
if (!rx_skbuff) {
/* there is not much we can do at this point */
@@ -2279,7 +2246,6 @@ static int pcnet32_init_ring(struct net_device *dev)
__func__);
return -1;
}
- skb_reserve(rx_skbuff, NET_IP_ALIGN);
}
rmb();
--
1.7.5.4
--
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