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net: thunderx: Use skb_add_rx_frag() for split buffer Rx pkts

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Instead of a round about way of converting buffers to SKBs and
combining them into a frag list, use standard skb_add_rx_frag()
API to merge page fragments. This code is useful when incoming
packets are of size more than RCV_FRAG_LEN which is currently
set to 2048bytes.

Signed-off-by: Sunil Goutham <sgoutham@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sunil Goutham 2016-08-12 16:51:37 +05:30 committed by David S. Miller
parent e412621394
commit a8671acca8
1 changed files with 6 additions and 18 deletions
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24
drivers/net/ethernet/cavium/thunder/nicvf_queues.c
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@ -1184,8 +1184,8 @@ struct sk_buff *nicvf_get_rcv_skb(struct nicvf *nic, struct cqe_rx_t *cqe_rx)
int frag;
int payload_len = 0;
struct sk_buff *skb = NULL;
struct sk_buff *skb_frag = NULL;
struct sk_buff *prev_frag = NULL;
struct page *page;
int offset;
u16 *rb_lens = NULL;
u64 *rb_ptrs = NULL;
@ -1218,22 +1218,10 @@ struct sk_buff *nicvf_get_rcv_skb(struct nicvf *nic, struct cqe_rx_t *cqe_rx)
skb_put(skb, payload_len);
} else {
/* Add fragments */
skb_frag = nicvf_rb_ptr_to_skb(nic, *rb_ptrs,
payload_len);
if (!skb_frag) {
dev_kfree_skb(skb);
return NULL;
}
if (!skb_shinfo(skb)->frag_list)
skb_shinfo(skb)->frag_list = skb_frag;
else
prev_frag->next = skb_frag;
prev_frag = skb_frag;
skb->len += payload_len;
skb->data_len += payload_len;
skb_frag->len = payload_len;
page = virt_to_page(phys_to_virt(*rb_ptrs));
offset = phys_to_virt(*rb_ptrs) - page_address(page);
skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
offset, payload_len, RCV_FRAG_LEN);
}
/* Next buffer pointer */
rb_ptrs++;