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net: Use netdev_alloc_skb_ip_align()

Browse source 
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2009-10-13 05:34:20 +00:00 committed by David S. Miller
parent bff1c09640
commit 89d71a66c4
38 changed files with 90 additions and 232 deletions
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3
drivers/net/3c59x.c
View file

@ -2560,7 +2560,7 @@ boomerang_rx(struct net_device *dev)
struct sk_buff *skb;
entry = vp->dirty_rx % RX_RING_SIZE;
if (vp->rx_skbuff[entry] == NULL) {
skb = netdev_alloc_skb(dev, PKT_BUF_SZ + NET_IP_ALIGN);
skb = netdev_alloc_skb_ip_align(dev, PKT_BUF_SZ);
if (skb == NULL) {
static unsigned long last_jif;
if (time_after(jiffies, last_jif + 10 * HZ)) {
@ -2572,7 +2572,6 @@ boomerang_rx(struct net_device *dev)
break; /* Bad news! */
}
skb_reserve(skb, NET_IP_ALIGN);
vp->rx_ring[entry].addr = cpu_to_le32(pci_map_single(VORTEX_PCI(vp), skb->data, PKT_BUF_SZ, PCI_DMA_FROMDEVICE));
vp->rx_skbuff[entry] = skb;
}

8
drivers/net/8139cp.c
View file

@ -549,14 +549,12 @@ rx_status_loop:
pr_debug("%s: rx slot %d status 0x%x len %d\n",
dev->name, rx_tail, status, len);
new_skb = netdev_alloc_skb(dev, buflen + NET_IP_ALIGN);
new_skb = netdev_alloc_skb_ip_align(dev, buflen);
if (!new_skb) {
dev->stats.rx_dropped++;
goto rx_next;
}
skb_reserve(new_skb, NET_IP_ALIGN);
dma_unmap_single(&cp->pdev->dev, mapping,
buflen, PCI_DMA_FROMDEVICE);
@ -1057,12 +1055,10 @@ static int cp_refill_rx(struct cp_private *cp)
struct sk_buff *skb;
dma_addr_t mapping;
skb = netdev_alloc_skb(dev, cp->rx_buf_sz + NET_IP_ALIGN);
skb = netdev_alloc_skb_ip_align(dev, cp->rx_buf_sz);
if (!skb)
goto err_out;
skb_reserve(skb, NET_IP_ALIGN);
mapping = dma_map_single(&cp->pdev->dev, skb->data,
cp->rx_buf_sz, PCI_DMA_FROMDEVICE);
cp->rx_skb[i] = skb;

3
drivers/net/8139too.c
View file

@ -2004,9 +2004,8 @@ no_early_rx:
/* Malloc up new buffer, compatible with net-2e. */
/* Omit the four octet CRC from the length. */
skb = netdev_alloc_skb(dev, pkt_size + NET_IP_ALIGN);
skb = netdev_alloc_skb_ip_align(dev, pkt_size);
if (likely(skb)) {
skb_reserve (skb, NET_IP_ALIGN); /* 16 byte align the IP fields. */
#if RX_BUF_IDX == 3
wrap_copy(skb, rx_ring, ring_offset+4, pkt_size);
#else

4
drivers/net/atl1e/atl1e_main.c
View file

@ -1433,14 +1433,12 @@ static void atl1e_clean_rx_irq(struct atl1e_adapter *adapter, u8 que,
packet_size = ((prrs->word1 >> RRS_PKT_SIZE_SHIFT) &
RRS_PKT_SIZE_MASK) - 4; /* CRC */
skb = netdev_alloc_skb(netdev,
packet_size + NET_IP_ALIGN);
skb = netdev_alloc_skb_ip_align(netdev, packet_size);
if (skb == NULL) {
dev_warn(&pdev->dev, "%s: Memory squeeze,"
"deferring packet.\n", netdev->name);
goto skip_pkt;
}
skb_reserve(skb, NET_IP_ALIGN);
skb->dev = netdev;
memcpy(skb->data, (u8 *)(prrs + 1), packet_size);
skb_put(skb, packet_size);

11
drivers/net/atlx/atl1.c
View file

@ -1864,21 +1864,14 @@ static u16 atl1_alloc_rx_buffers(struct atl1_adapter *adapter)
rfd_desc = ATL1_RFD_DESC(rfd_ring, rfd_next_to_use);
skb = netdev_alloc_skb(adapter->netdev,
adapter->rx_buffer_len + NET_IP_ALIGN);
skb = netdev_alloc_skb_ip_align(adapter->netdev,
adapter->rx_buffer_len);
if (unlikely(!skb)) {
/* Better luck next round */
adapter->netdev->stats.rx_dropped++;
break;
}
/*
* Make buffer alignment 2 beyond a 16 byte boundary
* this will result in a 16 byte aligned IP header after
* the 14 byte MAC header is removed
*/
skb_reserve(skb, NET_IP_ALIGN);
buffer_info->alloced = 1;
buffer_info->skb = skb;
buffer_info->length = (u16) adapter->rx_buffer_len;

3
drivers/net/atlx/atl2.c
View file

@ -409,7 +409,7 @@ static void atl2_intr_rx(struct atl2_adapter *adapter)
if (rxd->status.ok && rxd->status.pkt_size >= 60) {
int rx_size = (int)(rxd->status.pkt_size - 4);
/* alloc new buffer */
skb = netdev_alloc_skb(netdev, rx_size + NET_IP_ALIGN);
skb = netdev_alloc_skb_ip_align(netdev, rx_size);
if (NULL == skb) {
printk(KERN_WARNING
"%s: Mem squeeze, deferring packet.\n",
@ -421,7 +421,6 @@ static void atl2_intr_rx(struct atl2_adapter *adapter)
netdev->stats.rx_dropped++;
break;
}
skb_reserve(skb, NET_IP_ALIGN);
skb->dev = netdev;
memcpy(skb->data, rxd->packet, rx_size);
skb_put(skb, rx_size);

5
drivers/net/bcm63xx_enet.c
View file

@ -320,16 +320,13 @@ static int bcm_enet_receive_queue(struct net_device *dev, int budget)
if (len < copybreak) {
struct sk_buff *nskb;
nskb = netdev_alloc_skb(dev, len + NET_IP_ALIGN);
nskb = netdev_alloc_skb_ip_align(dev, len);
if (!nskb) {
/* forget packet, just rearm desc */
priv->stats.rx_dropped++;
continue;
}
/* since we're copying the data, we can align
* them properly */
skb_reserve(nskb, NET_IP_ALIGN);
dma_sync_single_for_cpu(kdev, desc->address,
len, DMA_FROM_DEVICE);
memcpy(nskb->data, skb->data, len);

4
drivers/net/benet/be_main.c
View file

@ -756,7 +756,7 @@ static void be_rx_compl_process(struct be_adapter *adapter,
if ((adapter->cap == 0x400) && !vtm)
vlanf = 0;
skb = netdev_alloc_skb(adapter->netdev, BE_HDR_LEN + NET_IP_ALIGN);
skb = netdev_alloc_skb_ip_align(adapter->netdev, BE_HDR_LEN);
if (!skb) {
if (net_ratelimit())
dev_warn(&adapter->pdev->dev, "skb alloc failed\n");
@ -764,8 +764,6 @@ static void be_rx_compl_process(struct be_adapter *adapter,
return;
}
skb_reserve(skb, NET_IP_ALIGN);
skb_fill_rx_data(adapter, skb, rxcp);
if (do_pkt_csum(rxcp, adapter->rx_csum))

6
drivers/net/cpmac.c
View file

@ -380,9 +380,8 @@ static struct sk_buff *cpmac_rx_one(struct cpmac_priv *priv,
return NULL;
}
skb = netdev_alloc_skb(priv->dev, CPMAC_SKB_SIZE);
skb = netdev_alloc_skb_ip_align(priv->dev, CPMAC_SKB_SIZE);
if (likely(skb)) {
skb_reserve(skb, 2);
skb_put(desc->skb, desc->datalen);
desc->skb->protocol = eth_type_trans(desc->skb, priv->dev);
desc->skb->ip_summed = CHECKSUM_NONE;
@ -991,12 +990,11 @@ static int cpmac_open(struct net_device *dev)
priv->rx_head = &priv->desc_ring[CPMAC_QUEUES];
for (i = 0, desc = priv->rx_head; i < priv->ring_size; i++, desc++) {
skb = netdev_alloc_skb(dev, CPMAC_SKB_SIZE);
skb = netdev_alloc_skb_ip_align(dev, CPMAC_SKB_SIZE);
if (unlikely(!skb)) {
res = -ENOMEM;
goto fail_desc;
}
skb_reserve(skb, 2);
desc->skb = skb;
desc->data_mapping = dma_map_single(&dev->dev, skb->data,
CPMAC_SKB_SIZE,

18
drivers/net/dl2k.c
View file

@ -505,7 +505,8 @@ rio_timer (unsigned long data)
entry = np->old_rx % RX_RING_SIZE;
/* Dropped packets don't need to re-allocate */
if (np->rx_skbuff[entry] == NULL) {
skb = netdev_alloc_skb (dev, np->rx_buf_sz);
skb = netdev_alloc_skb_ip_align(dev,
np->rx_buf_sz);
if (skb == NULL) {
np->rx_ring[entry].fraginfo = 0;
printk (KERN_INFO
@ -514,8 +515,6 @@ rio_timer (unsigned long data)
break;
}
np->rx_skbuff[entry] = skb;
/* 16 byte align the IP header */
skb_reserve (skb, 2);
np->rx_ring[entry].fraginfo =
cpu_to_le64 (pci_map_single
(np->pdev, skb->data, np->rx_buf_sz,
@ -576,7 +575,9 @@ alloc_list (struct net_device *dev)
/* Allocate the rx buffers */
for (i = 0; i < RX_RING_SIZE; i++) {
/* Allocated fixed size of skbuff */
struct sk_buff *skb = netdev_alloc_skb (dev, np->rx_buf_sz);
struct sk_buff *skb;
skb = netdev_alloc_skb_ip_align(dev, np->rx_buf_sz);
np->rx_skbuff[i] = skb;
if (skb == NULL) {
printk (KERN_ERR
@ -584,7 +585,6 @@ alloc_list (struct net_device *dev)
dev->name);
break;
}
skb_reserve (skb, 2); /* 16 byte align the IP header. */
/* Rubicon now supports 40 bits of addressing space. */
np->rx_ring[i].fraginfo =
cpu_to_le64 ( pci_map_single (
@ -871,13 +871,11 @@ receive_packet (struct net_device *dev)
PCI_DMA_FROMDEVICE);
skb_put (skb = np->rx_skbuff[entry], pkt_len);
np->rx_skbuff[entry] = NULL;
} else if ((skb = netdev_alloc_skb(dev, pkt_len + 2))) {
} else if ((skb = netdev_alloc_skb_ip_align(dev, pkt_len))) {
pci_dma_sync_single_for_cpu(np->pdev,
desc_to_dma(desc),
np->rx_buf_sz,
PCI_DMA_FROMDEVICE);
/* 16 byte align the IP header */
skb_reserve (skb, 2);
skb_copy_to_linear_data (skb,
np->rx_skbuff[entry]->data,
pkt_len);
@ -907,7 +905,7 @@ receive_packet (struct net_device *dev)
struct sk_buff *skb;
/* Dropped packets don't need to re-allocate */
if (np->rx_skbuff[entry] == NULL) {
skb = netdev_alloc_skb(dev, np->rx_buf_sz);
skb = netdev_alloc_skb_ip_align(dev, np->rx_buf_sz);
if (skb == NULL) {
np->rx_ring[entry].fraginfo = 0;
printk (KERN_INFO
@ -917,8 +915,6 @@ receive_packet (struct net_device *dev)
break;
}
np->rx_skbuff[entry] = skb;
/* 16 byte align the IP header */
skb_reserve (skb, 2);
np->rx_ring[entry].fraginfo =
cpu_to_le64 (pci_map_single
(np->pdev, skb->data, np->rx_buf_sz,

5
drivers/net/e100.c
View file

@ -1839,11 +1839,10 @@ static inline void e100_start_receiver(struct nic *nic, struct rx *rx)
#define RFD_BUF_LEN (sizeof(struct rfd) + VLAN_ETH_FRAME_LEN)
static int e100_rx_alloc_skb(struct nic *nic, struct rx *rx)
{
if (!(rx->skb = netdev_alloc_skb(nic->netdev, RFD_BUF_LEN + NET_IP_ALIGN)))
if (!(rx->skb = netdev_alloc_skb_ip_align(nic->netdev, RFD_BUF_LEN)))
return -ENOMEM;
/* Align, init, and map the RFD. */
skb_reserve(rx->skb, NET_IP_ALIGN);
/* Init, and map the RFD. */
skb_copy_to_linear_data(rx->skb, &nic->blank_rfd, sizeof(struct rfd));
rx->dma_addr = pci_map_single(nic->pdev, rx->skb->data,
RFD_BUF_LEN, PCI_DMA_BIDIRECTIONAL);

29
drivers/net/e1000/e1000_main.c
View file

@ -3866,9 +3866,8 @@ static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
* of reassembly being done in the stack */
if (length < copybreak) {
struct sk_buff *new_skb =
netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
netdev_alloc_skb_ip_align(netdev, length);
if (new_skb) {
skb_reserve(new_skb, NET_IP_ALIGN);
skb_copy_to_linear_data_offset(new_skb,
-NET_IP_ALIGN,
(skb->data -
@ -3937,9 +3936,7 @@ e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
struct e1000_buffer *buffer_info;
struct sk_buff *skb;
unsigned int i;
unsigned int bufsz = 256 -
16 /*for skb_reserve */ -
NET_IP_ALIGN;
unsigned int bufsz = 256 - 16 /*for skb_reserve */ ;
i = rx_ring->next_to_use;
buffer_info = &rx_ring->buffer_info[i];
@ -3951,7 +3948,7 @@ e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
goto check_page;
}
skb = netdev_alloc_skb(netdev, bufsz);
skb = netdev_alloc_skb_ip_align(netdev, bufsz);
if (unlikely(!skb)) {
/* Better luck next round */
adapter->alloc_rx_buff_failed++;
@ -3964,7 +3961,7 @@ e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
DPRINTK(PROBE, ERR, "skb align check failed: %u bytes "
"at %p\n", bufsz, skb->data);
/* Try again, without freeing the previous */
skb = netdev_alloc_skb(netdev, bufsz);
skb = netdev_alloc_skb_ip_align(netdev, bufsz);
/* Failed allocation, critical failure */
if (!skb) {
dev_kfree_skb(oldskb);
@ -3982,12 +3979,6 @@ e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
/* Use new allocation */
dev_kfree_skb(oldskb);
}
/* Make buffer alignment 2 beyond a 16 byte boundary
* this will result in a 16 byte aligned IP header after
* the 14 byte MAC header is removed
*/
skb_reserve(skb, NET_IP_ALIGN);
buffer_info->skb = skb;
buffer_info->length = adapter->rx_buffer_len;
check_page:
@ -4044,7 +4035,7 @@ static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
struct e1000_buffer *buffer_info;
struct sk_buff *skb;
unsigned int i;
unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
unsigned int bufsz = adapter->rx_buffer_len;
i = rx_ring->next_to_use;
buffer_info = &rx_ring->buffer_info[i];
@ -4056,7 +4047,7 @@ static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
goto map_skb;
}
skb = netdev_alloc_skb(netdev, bufsz);
skb = netdev_alloc_skb_ip_align(netdev, bufsz);
if (unlikely(!skb)) {
/* Better luck next round */
adapter->alloc_rx_buff_failed++;
@ -4069,7 +4060,7 @@ static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
"at %p\n", bufsz, skb->data);
/* Try again, without freeing the previous */
skb = netdev_alloc_skb(netdev, bufsz);
skb = netdev_alloc_skb_ip_align(netdev, bufsz);
/* Failed allocation, critical failure */
if (!skb) {
dev_kfree_skb(oldskb);
@ -4088,12 +4079,6 @@ static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
/* Use new allocation */
dev_kfree_skb(oldskb);
}
/* Make buffer alignment 2 beyond a 16 byte boundary
* this will result in a 16 byte aligned IP header after
* the 14 byte MAC header is removed
*/
skb_reserve(skb, NET_IP_ALIGN);
buffer_info->skb = skb;
buffer_info->length = adapter->rx_buffer_len;
map_skb:

37
drivers/net/e1000e/netdev.c
View file

@ -167,7 +167,7 @@ static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
struct e1000_buffer *buffer_info;
struct sk_buff *skb;
unsigned int i;
unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
unsigned int bufsz = adapter->rx_buffer_len;
i = rx_ring->next_to_use;
buffer_info = &rx_ring->buffer_info[i];
@ -179,20 +179,13 @@ static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
goto map_skb;
}
skb = netdev_alloc_skb(netdev, bufsz);
skb = netdev_alloc_skb_ip_align(netdev, bufsz);
if (!skb) {
/* Better luck next round */
adapter->alloc_rx_buff_failed++;
break;
}
/*
* Make buffer alignment 2 beyond a 16 byte boundary
* this will result in a 16 byte aligned IP header after
* the 14 byte MAC header is removed
*/
skb_reserve(skb, NET_IP_ALIGN);
buffer_info->skb = skb;
map_skb:
buffer_info->dma = pci_map_single(pdev, skb->data,
@ -284,21 +277,14 @@ static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
cpu_to_le64(ps_page->dma);
}
skb = netdev_alloc_skb(netdev,
adapter->rx_ps_bsize0 + NET_IP_ALIGN);
skb = netdev_alloc_skb_ip_align(netdev,
adapter->rx_ps_bsize0);
if (!skb) {
adapter->alloc_rx_buff_failed++;
break;
}
/*
* Make buffer alignment 2 beyond a 16 byte boundary
* this will result in a 16 byte aligned IP header after
* the 14 byte MAC header is removed
*/
skb_reserve(skb, NET_IP_ALIGN);
buffer_info->skb = skb;
buffer_info->dma = pci_map_single(pdev, skb->data,
adapter->rx_ps_bsize0,
@ -359,9 +345,7 @@ static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
struct e1000_buffer *buffer_info;
struct sk_buff *skb;
unsigned int i;
unsigned int bufsz = 256 -
16 /* for skb_reserve */ -
NET_IP_ALIGN;
unsigned int bufsz = 256 - 16 /* for skb_reserve */;
i = rx_ring->next_to_use;
buffer_info = &rx_ring->buffer_info[i];
@ -373,19 +357,13 @@ static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
goto check_page;
}
skb = netdev_alloc_skb(netdev, bufsz);
skb = netdev_alloc_skb_ip_align(netdev, bufsz);
if (unlikely(!skb)) {
/* Better luck next round */
adapter->alloc_rx_buff_failed++;
break;
}
/* Make buffer alignment 2 beyond a 16 byte boundary
* this will result in a 16 byte aligned IP header after
* the 14 byte MAC header is removed
*/
skb_reserve(skb, NET_IP_ALIGN);
buffer_info->skb = skb;
check_page:
/* allocate a new page if necessary */
@ -513,9 +491,8 @@ static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
*/
if (length < copybreak) {
struct sk_buff *new_skb =
netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
netdev_alloc_skb_ip_align(netdev, length);
if (new_skb) {
skb_reserve(new_skb, NET_IP_ALIGN);
skb_copy_to_linear_data_offset(new_skb,
-NET_IP_ALIGN,
(skb->data -

9
drivers/net/ehea/ehea_main.c
View file

@ -447,7 +447,9 @@ static int ehea_refill_rq_def(struct ehea_port_res *pr,
max_index_mask = q_skba->len - 1;
for (i = 0; i < fill_wqes; i++) {
u64 tmp_addr;
struct sk_buff *skb = netdev_alloc_skb(dev, packet_size);
struct sk_buff *skb;
skb = netdev_alloc_skb_ip_align(dev, packet_size);
if (!skb) {
q_skba->os_skbs = fill_wqes - i;
if (q_skba->os_skbs == q_skba->len - 2) {
@ -457,7 +459,6 @@ static int ehea_refill_rq_def(struct ehea_port_res *pr,
}
break;
}
skb_reserve(skb, NET_IP_ALIGN);
skb_arr[index] = skb;
tmp_addr = ehea_map_vaddr(skb->data);
@ -500,7 +501,7 @@ static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
{
return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
nr_of_wqes, EHEA_RWQE2_TYPE,
EHEA_RQ2_PKT_SIZE + NET_IP_ALIGN);
EHEA_RQ2_PKT_SIZE);
}
@ -508,7 +509,7 @@ static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
{
return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
nr_of_wqes, EHEA_RWQE3_TYPE,
EHEA_MAX_PACKET_SIZE + NET_IP_ALIGN);
EHEA_MAX_PACKET_SIZE);
}
static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)

15
drivers/net/enic/enic_main.c
View file

@ -870,19 +870,6 @@ static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
dev_kfree_skb_any(buf->os_buf);
}
static inline struct sk_buff *enic_rq_alloc_skb(struct net_device *netdev,
unsigned int size)
{
struct sk_buff *skb;
skb = netdev_alloc_skb(netdev, size + NET_IP_ALIGN);
if (skb)
skb_reserve(skb, NET_IP_ALIGN);
return skb;
}
static int enic_rq_alloc_buf(struct vnic_rq *rq)
{
struct enic *enic = vnic_dev_priv(rq->vdev);
@ -892,7 +879,7 @@ static int enic_rq_alloc_buf(struct vnic_rq *rq)
unsigned int os_buf_index = 0;
dma_addr_t dma_addr;
skb = enic_rq_alloc_skb(netdev, len);
skb = netdev_alloc_skb_ip_align(netdev, len);
if (!skb)
return -ENOMEM;

4
drivers/net/ethoc.c
View file

@ -404,10 +404,10 @@ static int ethoc_rx(struct net_device *dev, int limit)
if (ethoc_update_rx_stats(priv, &bd) == 0) {
int size = bd.stat >> 16;
struct sk_buff *skb = netdev_alloc_skb(dev, size);
struct sk_buff *skb;
size -= 4; /* strip the CRC */
skb_reserve(skb, 2); /* align TCP/IP header */
skb = netdev_alloc_skb_ip_align(dev, size);
if (likely(skb)) {
void *src = phys_to_virt(bd.addr);

12
drivers/net/hamachi.c
View file

@ -406,10 +406,9 @@ that case.
/* A few values that may be tweaked. */
/* Size of each temporary Rx buffer, calculated as:
* 1518 bytes (ethernet packet) + 2 bytes (to get 8 byte alignment for
* the card) + 8 bytes of status info + 8 bytes for the Rx Checksum +
* 2 more because we use skb_reserve.
* the card) + 8 bytes of status info + 8 bytes for the Rx Checksum
*/
#define PKT_BUF_SZ 1538
#define PKT_BUF_SZ 1536
/* For now, this is going to be set to the maximum size of an ethernet
* packet. Eventually, we may want to make it a variable that is
@ -1151,12 +1150,13 @@ static void hamachi_tx_timeout(struct net_device *dev)
}
/* Fill in the Rx buffers. Handle allocation failure gracefully. */
for (i = 0; i < RX_RING_SIZE; i++) {
struct sk_buff *skb = netdev_alloc_skb(dev, hmp->rx_buf_sz);
struct sk_buff *skb;
skb = netdev_alloc_skb_ip_align(dev, hmp->rx_buf_sz);
hmp->rx_skbuff[i] = skb;
if (skb == NULL)
break;
skb_reserve(skb, 2); /* 16 byte align the IP header. */
hmp->rx_ring[i].addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
skb->data, hmp->rx_buf_sz, PCI_DMA_FROMDEVICE));
hmp->rx_ring[i].status_n_length = cpu_to_le32(DescOwn |
@ -1195,7 +1195,7 @@ static void hamachi_init_ring(struct net_device *dev)
* card. -KDU
*/
hmp->rx_buf_sz = (dev->mtu <= 1492 ? PKT_BUF_SZ :
(((dev->mtu+26+7) & ~7) + 2 + 16));
(((dev->mtu+26+7) & ~7) + 16));
/* Initialize all Rx descriptors. */
for (i = 0; i < RX_RING_SIZE; i++) {

8
drivers/net/igb/igb_main.c
View file

@ -4934,18 +4934,12 @@ static void igb_alloc_rx_buffers_adv(struct igb_ring *rx_ring,
}
if (!buffer_info->skb) {
skb = netdev_alloc_skb(netdev, bufsz + NET_IP_ALIGN);
skb = netdev_alloc_skb_ip_align(netdev, bufsz);
if (!skb) {
adapter->alloc_rx_buff_failed++;
goto no_buffers;
}
/* Make buffer alignment 2 beyond a 16 byte boundary
* this will result in a 16 byte aligned IP header after
* the 14 byte MAC header is removed
*/
skb_reserve(skb, NET_IP_ALIGN);
buffer_info->skb = skb;
buffer_info->dma = pci_map_single(pdev, skb->data,
bufsz,

8
drivers/net/igbvf/netdev.c
View file

@ -170,18 +170,12 @@ static void igbvf_alloc_rx_buffers(struct igbvf_ring *rx_ring,
}
if (!buffer_info->skb) {
skb = netdev_alloc_skb(netdev, bufsz + NET_IP_ALIGN);
skb = netdev_alloc_skb_ip_align(netdev, bufsz);
if (!skb) {
adapter->alloc_rx_buff_failed++;
goto no_buffers;
}
/* Make buffer alignment 2 beyond a 16 byte boundary
* this will result in a 16 byte aligned IP header after
* the 14 byte MAC header is removed
*/
skb_reserve(skb, NET_IP_ALIGN);
buffer_info->skb = skb;
buffer_info->dma = pci_map_single(pdev, skb->data,
bufsz,

7
drivers/net/ipg.c
View file

@ -738,17 +738,12 @@ static int ipg_get_rxbuff(struct net_device *dev, int entry)
IPG_DEBUG_MSG("_get_rxbuff\n");
skb = netdev_alloc_skb(dev, sp->rxsupport_size + NET_IP_ALIGN);
skb = netdev_alloc_skb_ip_align(dev, sp->rxsupport_size);
if (!skb) {
sp->rx_buff[entry] = NULL;
return -ENOMEM;
}
/* Adjust the data start location within the buffer to
* align IP address field to a 16 byte boundary.
*/
skb_reserve(skb, NET_IP_ALIGN);
/* Associate the receive buffer with the IPG NIC. */
skb->dev = dev;

12
drivers/net/ixgb/ixgb_main.c
View file

@ -1972,9 +1972,8 @@ ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
* of reassembly being done in the stack */
if (length < copybreak) {
struct sk_buff *new_skb =
netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
netdev_alloc_skb_ip_align(netdev, length);
if (new_skb) {
skb_reserve(new_skb, NET_IP_ALIGN);
skb_copy_to_linear_data_offset(new_skb,
-NET_IP_ALIGN,
(skb->data -
@ -2057,20 +2056,13 @@ ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count)
goto map_skb;
}
skb = netdev_alloc_skb(netdev, adapter->rx_buffer_len
+ NET_IP_ALIGN);
skb = netdev_alloc_skb_ip_align(netdev, adapter->rx_buffer_len);
if (unlikely(!skb)) {
/* Better luck next round */
adapter->alloc_rx_buff_failed++;
break;
}
/* Make buffer alignment 2 beyond a 16 byte boundary
* this will result in a 16 byte aligned IP header after
* the 14 byte MAC header is removed
*/
skb_reserve(skb, NET_IP_ALIGN);
buffer_info->skb = skb;
buffer_info->length = adapter->rx_buffer_len;
map_skb:

12
drivers/net/ixgbe/ixgbe_main.c
View file

@ -616,22 +616,14 @@ static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
if (!bi->skb) {
struct sk_buff *skb;
skb = netdev_alloc_skb(adapter->netdev,
(rx_ring->rx_buf_len +
NET_IP_ALIGN));
skb = netdev_alloc_skb_ip_align(adapter->netdev,
rx_ring->rx_buf_len);
if (!skb) {
adapter->alloc_rx_buff_failed++;
goto no_buffers;
}
/*
* Make buffer alignment 2 beyond a 16 byte boundary
* this will result in a 16 byte aligned IP header after
* the 14 byte MAC header is removed
*/
skb_reserve(skb, NET_IP_ALIGN);
bi->skb = skb;
bi->dma = pci_map_single(pdev, skb->data,
rx_ring->rx_buf_len,

3
drivers/net/ixp2000/ixpdev.c
View file

@ -108,9 +108,8 @@ static int ixpdev_rx(struct net_device *dev, int processed, int budget)
if (unlikely(!netif_running(nds[desc->channel])))
goto err;
skb = netdev_alloc_skb(dev, desc->pkt_length + 2);
skb = netdev_alloc_skb_ip_align(dev, desc->pkt_length);
if (likely(skb != NULL)) {
skb_reserve(skb, 2);
skb_copy_to_linear_data(skb, buf, desc->pkt_length);
skb_put(skb, desc->pkt_length);
skb->protocol = eth_type_trans(skb, nds[desc->channel]);

5
drivers/net/korina.c
View file

@ -400,7 +400,7 @@ static int korina_rx(struct net_device *dev, int limit)
dma_cache_inv((unsigned long)pkt_buf, pkt_len - 4);
/* Malloc up new buffer. */
skb_new = netdev_alloc_skb(dev, KORINA_RBSIZE + 2);
skb_new = netdev_alloc_skb_ip_align(dev, KORINA_RBSIZE);
if (!skb_new)
break;
@ -417,9 +417,6 @@ static int korina_rx(struct net_device *dev, int limit)
if (devcs & ETH_RX_MP)
dev->stats.multicast++;
/* 16 bit align */
skb_reserve(skb_new, 2);
lp->rx_skb[lp->rx_next_done] = skb_new;
}

5
drivers/net/ks8842.c
View file

@ -357,7 +357,7 @@ static void ks8842_rx_frame(struct net_device *netdev,
/* check the status */
if ((status & RXSR_VALID) && !(status & RXSR_ERROR)) {
struct sk_buff *skb = netdev_alloc_skb(netdev, len + 2);
struct sk_buff *skb = netdev_alloc_skb_ip_align(netdev, len);
dev_dbg(&adapter->pdev->dev, "%s, got package, len: %d\n",
__func__, len);
@ -369,9 +369,6 @@ static void ks8842_rx_frame(struct net_device *netdev,
if (status & RXSR_MULTICAST)
netdev->stats.multicast++;
/* Align socket buffer in 4-byte boundary for
better performance. */
skb_reserve(skb, 2);
data = (u32 *)skb_put(skb, len);
ks8842_select_bank(adapter, 17);

11
drivers/net/lib82596.c
View file

@ -470,11 +470,11 @@ static inline int init_rx_bufs(struct net_device *dev)
for (i = 0, rbd = dma->rbds; i < rx_ring_size; i++, rbd++) {
dma_addr_t dma_addr;
struct sk_buff *skb = netdev_alloc_skb(dev, PKT_BUF_SZ + 4);
struct sk_buff *skb;
skb = netdev_alloc_skb_ip_align(dev, PKT_BUF_SZ);
if (skb == NULL)
return -1;
skb_reserve(skb, 2);
dma_addr = dma_map_single(dev->dev.parent, skb->data,
PKT_BUF_SZ, DMA_FROM_DEVICE);
rbd->v_next = rbd+1;
@ -697,12 +697,12 @@ static inline int i596_rx(struct net_device *dev)
(dma_addr_t)SWAP32(rbd->b_data),
PKT_BUF_SZ, DMA_FROM_DEVICE);
/* Get fresh skbuff to replace filled one. */
newskb = netdev_alloc_skb(dev, PKT_BUF_SZ + 4);
newskb = netdev_alloc_skb_ip_align(dev,
PKT_BUF_SZ);
if (newskb == NULL) {
skb = NULL; /* drop pkt */
goto memory_squeeze;
}
skb_reserve(newskb, 2);
/* Pass up the skb already on the Rx ring. */
skb_put(skb, pkt_len);
@ -716,7 +716,7 @@ static inline int i596_rx(struct net_device *dev)
rbd->b_data = SWAP32(dma_addr);
DMA_WBACK_INV(dev, rbd, sizeof(struct i596_rbd));
} else
skb = netdev_alloc_skb(dev, pkt_len + 2);
skb = netdev_alloc_skb_ip_align(dev, pkt_len);
memory_squeeze:
if (skb == NULL) {
/* XXX tulip.c can defer packets here!! */
@ -730,7 +730,6 @@ memory_squeeze:
dma_sync_single_for_cpu(dev->dev.parent,
(dma_addr_t)SWAP32(rbd->b_data),
PKT_BUF_SZ, DMA_FROM_DEVICE);
skb_reserve(skb, 2);
memcpy(skb_put(skb, pkt_len), rbd->v_data, pkt_len);
dma_sync_single_for_device(dev->dev.parent,
(dma_addr_t)SWAP32(rbd->b_data),

3
drivers/net/r8169.c
View file

@ -3555,13 +3555,12 @@ static inline bool rtl8169_try_rx_copy(struct sk_buff **sk_buff,
if (pkt_size >= rx_copybreak)
goto out;
skb = netdev_alloc_skb(tp->dev, pkt_size + NET_IP_ALIGN);
skb = netdev_alloc_skb_ip_align(tp->dev, pkt_size);
if (!skb)
goto out;
pci_dma_sync_single_for_cpu(tp->pci_dev, addr, pkt_size,
PCI_DMA_FROMDEVICE);
skb_reserve(skb, NET_IP_ALIGN);
skb_copy_from_linear_data(*sk_buff, skb->data, pkt_size);
*sk_buff = skb;
done = true;

4
drivers/net/sc92031.c
View file

@ -793,7 +793,7 @@ static void _sc92031_rx_tasklet(struct net_device *dev)
rx_len -= rx_size_align + 4;
skb = netdev_alloc_skb(dev, pkt_size + NET_IP_ALIGN);
skb = netdev_alloc_skb_ip_align(dev, pkt_size);
if (unlikely(!skb)) {
if (printk_ratelimit())
printk(KERN_ERR "%s: Couldn't allocate a skb_buff for a packet of size %u\n",
@ -801,8 +801,6 @@ static void _sc92031_rx_tasklet(struct net_device *dev)
goto next;
}
skb_reserve(skb, NET_IP_ALIGN);
if ((rx_ring_offset + pkt_size) > RX_BUF_LEN) {
memcpy(skb_put(skb, RX_BUF_LEN - rx_ring_offset),
rx_ring + rx_ring_offset, RX_BUF_LEN - rx_ring_offset);

7
drivers/net/sgiseeq.c
View file

@ -365,11 +365,10 @@ static inline void sgiseeq_rx(struct net_device *dev, struct sgiseeq_private *sp
}
skb_reserve(newskb, 2);
} else {
skb = netdev_alloc_skb(dev, len + 2);
if (skb) {
skb_reserve(skb, 2);
skb = netdev_alloc_skb_ip_align(dev, len);
if (skb)
skb_copy_to_linear_data(skb, rd->skb->data, len);
}
newskb = rd->skb;
}
memory_squeeze:

3
drivers/net/sis190.c
View file

@ -536,13 +536,12 @@ static bool sis190_try_rx_copy(struct sis190_private *tp,
if (pkt_size >= rx_copybreak)
goto out;
skb = netdev_alloc_skb(tp->dev, pkt_size + 2);
skb = netdev_alloc_skb_ip_align(tp->dev, pkt_size);
if (!skb)
goto out;
pci_dma_sync_single_for_cpu(tp->pci_dev, addr, tp->rx_buf_sz,
PCI_DMA_FROMDEVICE);
skb_reserve(skb, 2);
skb_copy_to_linear_data(skb, sk_buff[0]->data, pkt_size);
*sk_buff = skb;
done = true;

7
drivers/net/skge.c
View file

@ -3070,11 +3070,10 @@ static struct sk_buff *skge_rx_get(struct net_device *dev,
goto error;
if (len < RX_COPY_THRESHOLD) {
skb = netdev_alloc_skb(dev, len + 2);
skb = netdev_alloc_skb_ip_align(dev, len);
if (!skb)
goto resubmit;
skb_reserve(skb, 2);
pci_dma_sync_single_for_cpu(skge->hw->pdev,
pci_unmap_addr(e, mapaddr),
len, PCI_DMA_FROMDEVICE);
@ -3085,11 +3084,11 @@ static struct sk_buff *skge_rx_get(struct net_device *dev,
skge_rx_reuse(e, skge->rx_buf_size);
} else {
struct sk_buff *nskb;
nskb = netdev_alloc_skb(dev, skge->rx_buf_size + NET_IP_ALIGN);
nskb = netdev_alloc_skb_ip_align(dev, skge->rx_buf_size);
if (!nskb)
goto resubmit;
skb_reserve(nskb, NET_IP_ALIGN);
pci_unmap_single(skge->hw->pdev,
pci_unmap_addr(e, mapaddr),
pci_unmap_len(e, maplen),

3
drivers/net/sky2.c
View file

@ -2191,9 +2191,8 @@ static struct sk_buff *receive_copy(struct sky2_port *sky2,
{
struct sk_buff *skb;
skb = netdev_alloc_skb(sky2->netdev, length + 2);
skb = netdev_alloc_skb_ip_align(sky2->netdev, length);
if (likely(skb)) {
skb_reserve(skb, 2);
pci_dma_sync_single_for_cpu(sky2->hw->pdev, re->data_addr,
length, PCI_DMA_FROMDEVICE);
skb_copy_from_linear_data(re->skb, skb->data, length);

7
drivers/net/tlan.c
View file

@ -1549,7 +1549,8 @@ static u32 TLan_HandleRxEOF( struct net_device *dev, u16 host_int )
if (tmpCStat & TLAN_CSTAT_EOC)
eoc = 1;
new_skb = netdev_alloc_skb(dev, TLAN_MAX_FRAME_SIZE + 7 );
new_skb = netdev_alloc_skb_ip_align(dev,
TLAN_MAX_FRAME_SIZE + 5);
if ( !new_skb )
goto drop_and_reuse;
@ -1563,7 +1564,6 @@ static u32 TLan_HandleRxEOF( struct net_device *dev, u16 host_int )
skb->protocol = eth_type_trans( skb, dev );
netif_rx( skb );
skb_reserve( new_skb, NET_IP_ALIGN );
head_list->buffer[0].address = pci_map_single(priv->pciDev,
new_skb->data,
TLAN_MAX_FRAME_SIZE,
@ -1967,13 +1967,12 @@ static void TLan_ResetLists( struct net_device *dev )
list->cStat = TLAN_CSTAT_READY;
list->frameSize = TLAN_MAX_FRAME_SIZE;
list->buffer[0].count = TLAN_MAX_FRAME_SIZE | TLAN_LAST_BUFFER;
skb = netdev_alloc_skb(dev, TLAN_MAX_FRAME_SIZE + 7 );
skb = netdev_alloc_skb_ip_align(dev, TLAN_MAX_FRAME_SIZE + 5);
if ( !skb ) {
pr_err("TLAN: out of memory for received data.\n" );
break;
}
skb_reserve( skb, NET_IP_ALIGN );
list->buffer[0].address = pci_map_single(priv->pciDev,
skb->data,
TLAN_MAX_FRAME_SIZE,

10
drivers/net/tsi108_eth.c
View file

@ -802,13 +802,11 @@ static int tsi108_refill_rx(struct net_device *dev, int budget)
int rx = data->rxhead;
struct sk_buff *skb;
data->rxskbs[rx] = skb = netdev_alloc_skb(dev,
TSI108_RXBUF_SIZE + 2);
skb = netdev_alloc_skb_ip_align(dev, TSI108_RXBUF_SIZE);
data->rxskbs[rx] = skb;
if (!skb)
break;
skb_reserve(skb, 2); /* Align the data on a 4-byte boundary. */
data->rxring[rx].buf0 = dma_map_single(NULL, skb->data,
TSI108_RX_SKB_SIZE,
DMA_FROM_DEVICE);
@ -1356,7 +1354,7 @@ static int tsi108_open(struct net_device *dev)
for (i = 0; i < TSI108_RXRING_LEN; i++) {
struct sk_buff *skb;
skb = netdev_alloc_skb(dev, TSI108_RXBUF_SIZE + NET_IP_ALIGN);
skb = netdev_alloc_skb_ip_align(dev, TSI108_RXBUF_SIZE);
if (!skb) {
/* Bah. No memory for now, but maybe we'll get
* some more later.
@ -1370,8 +1368,6 @@ static int tsi108_open(struct net_device *dev)
}
data->rxskbs[i] = skb;
/* Align the payload on a 4-byte boundary */
skb_reserve(skb, 2);
data->rxskbs[i] = skb;
data->rxring[i].buf0 = virt_to_phys(data->rxskbs[i]->data);
data->rxring[i].misc = TSI108_RX_OWN | TSI108_RX_INT;

8
drivers/net/via-rhine.c
View file

@ -1484,15 +1484,15 @@ static int rhine_rx(struct net_device *dev, int limit)
}
}
} else {
struct sk_buff *skb;
struct sk_buff *skb = NULL;
/* Length should omit the CRC */
int pkt_len = data_size - 4;
/* Check if the packet is long enough to accept without
copying to a minimally-sized skbuff. */
if (pkt_len < rx_copybreak &&
(skb = netdev_alloc_skb(dev, pkt_len + NET_IP_ALIGN)) != NULL) {
skb_reserve(skb, NET_IP_ALIGN); /* 16 byte align the IP header */
if (pkt_len < rx_copybreak)
skb = netdev_alloc_skb_ip_align(dev, pkt_len);
if (skb) {
pci_dma_sync_single_for_cpu(rp->pdev,
rp->rx_skbuff_dma[entry],
rp->rx_buf_sz,

3
drivers/net/via-velocity.c
View file

@ -1949,10 +1949,9 @@ static int velocity_rx_copy(struct sk_buff **rx_skb, int pkt_size,
if (pkt_size < rx_copybreak) {
struct sk_buff *new_skb;
new_skb = netdev_alloc_skb(vptr->dev, pkt_size + 2);
new_skb = netdev_alloc_skb_ip_align(vptr->dev, pkt_size);
if (new_skb) {
new_skb->ip_summed = rx_skb[0]->ip_summed;
skb_reserve(new_skb, 2);
skb_copy_from_linear_data(*rx_skb, new_skb->data, pkt_size);
*rx_skb = new_skb;
ret = 0;

7
drivers/net/virtio_net.c
View file

@ -283,13 +283,12 @@ static bool try_fill_recv_maxbufs(struct virtnet_info *vi, gfp_t gfp)
do {
struct skb_vnet_hdr *hdr;
skb = netdev_alloc_skb(vi->dev, MAX_PACKET_LEN + NET_IP_ALIGN);
skb = netdev_alloc_skb_ip_align(vi->dev, MAX_PACKET_LEN);
if (unlikely(!skb)) {
oom = true;
break;
}
skb_reserve(skb, NET_IP_ALIGN);
skb_put(skb, MAX_PACKET_LEN);
hdr = skb_vnet_hdr(skb);
@ -344,14 +343,12 @@ static bool try_fill_recv(struct virtnet_info *vi, gfp_t gfp)
do {
skb_frag_t *f;
skb = netdev_alloc_skb(vi->dev, GOOD_COPY_LEN + NET_IP_ALIGN);
skb = netdev_alloc_skb_ip_align(vi->dev, GOOD_COPY_LEN);
if (unlikely(!skb)) {
oom = true;
break;
}
skb_reserve(skb, NET_IP_ALIGN);
f = &skb_shinfo(skb)->frags[0];
f->page = get_a_page(vi, gfp);
if (!f->page) {

13
net/core/dev.c
View file

@ -2604,20 +2604,13 @@ EXPORT_SYMBOL(napi_reuse_skb);
struct sk_buff *napi_get_frags(struct napi_struct *napi)
{
struct net_device *dev = napi->dev;
struct sk_buff *skb = napi->skb;
if (!skb) {
skb = netdev_alloc_skb(dev, GRO_MAX_HEAD + NET_IP_ALIGN);
if (!skb)
goto out;
skb_reserve(skb, NET_IP_ALIGN);
napi->skb = skb;
skb = netdev_alloc_skb_ip_align(napi->dev, GRO_MAX_HEAD);
if (skb)
napi->skb = skb;
}
out:
return skb;
}
EXPORT_SYMBOL(napi_get_frags);