diff options
Diffstat (limited to 'drivers/net/ethernet/intel/ice/ice_txrx.c')
| -rw-r--r-- | drivers/net/ethernet/intel/ice/ice_txrx.c | 70 |
1 files changed, 24 insertions, 46 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.c b/drivers/net/ethernet/intel/ice/ice_txrx.c index 50321d39e463..becee476002d 100644 --- a/drivers/net/ethernet/intel/ice/ice_txrx.c +++ b/drivers/net/ethernet/intel/ice/ice_txrx.c @@ -562,13 +562,17 @@ ice_add_rx_frag(struct ice_rx_buf *rx_buf, struct sk_buff *skb, unsigned int truesize = ALIGN(size, L1_CACHE_BYTES); #endif /* PAGE_SIZE < 8192) */ struct page *page = rx_buf->page; + unsigned int pull_len; + unsigned char *va; + + va = page_address(page) + rx_buf->page_offset; + if (unlikely(skb_is_nonlinear(skb))) + goto add_tail_frag; /* will the data fit in the skb we allocated? if so, just * copy it as it is pretty small anyway */ - if (size <= ICE_RX_HDR_SIZE && !skb_is_nonlinear(skb)) { - unsigned char *va = page_address(page) + rx_buf->page_offset; - + if (size <= ICE_RX_HDR_SIZE) { memcpy(__skb_put(skb, size), va, ALIGN(size, sizeof(long))); /* page is not reserved, we can reuse buffer as-is */ @@ -580,8 +584,24 @@ ice_add_rx_frag(struct ice_rx_buf *rx_buf, struct sk_buff *skb, return false; } + /* we need the header to contain the greater of either ETH_HLEN or + * 60 bytes if the skb->len is less than 60 for skb_pad. + */ + pull_len = eth_get_headlen(va, ICE_RX_HDR_SIZE); + + /* align pull length to size of long to optimize memcpy performance */ + memcpy(__skb_put(skb, pull_len), va, ALIGN(pull_len, sizeof(long))); + + /* the header from the frame that we're adding as a frag was added to + * linear part of skb so move the pointer past that header and + * reduce the size of data + */ + va += pull_len; + size -= pull_len; + +add_tail_frag: skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page, - rx_buf->page_offset, size, truesize); + (unsigned long)va & ~PAGE_MASK, size, truesize); return ice_can_reuse_rx_page(rx_buf, truesize); } @@ -692,44 +712,6 @@ ice_fetch_rx_buf(struct ice_ring *rx_ring, struct ice_rx_buf *rx_buf, } /** - * ice_pull_tail - ice specific version of skb_pull_tail - * @skb: pointer to current skb being adjusted - * - * This function is an ice specific version of __pskb_pull_tail. The - * main difference between this version and the original function is that - * this function can make several assumptions about the state of things - * that allow for significant optimizations versus the standard function. - * As a result we can do things like drop a frag and maintain an accurate - * truesize for the skb. - */ -static void ice_pull_tail(struct sk_buff *skb) -{ - struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0]; - unsigned int pull_len; - unsigned char *va; - - /* it is valid to use page_address instead of kmap since we are - * working with pages allocated out of the lomem pool per - * alloc_page(GFP_ATOMIC) - */ - va = skb_frag_address(frag); - - /* we need the header to contain the greater of either ETH_HLEN or - * 60 bytes if the skb->len is less than 60 for skb_pad. - */ - pull_len = eth_get_headlen(va, ICE_RX_HDR_SIZE); - - /* align pull length to size of long to optimize memcpy performance */ - skb_copy_to_linear_data(skb, va, ALIGN(pull_len, sizeof(long))); - - /* update all of the pointers */ - skb_frag_size_sub(frag, pull_len); - frag->page_offset += pull_len; - skb->data_len -= pull_len; - skb->tail += pull_len; -} - -/** * ice_cleanup_headers - Correct empty headers * @skb: pointer to current skb being fixed * @@ -743,10 +725,6 @@ static void ice_pull_tail(struct sk_buff *skb) */ static bool ice_cleanup_headers(struct sk_buff *skb) { - /* place header in linear portion of buffer */ - if (skb_is_nonlinear(skb)) - ice_pull_tail(skb); - /* if eth_skb_pad returns an error the skb was freed */ if (eth_skb_pad(skb)) return true; |