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Commit 6d9c0217 authored by Emil Tantilov's avatar Emil Tantilov Committed by Jeff Kirsher
Browse files

ixgbevf: add build_skb support 



Add support for build_skb() similar to:
commit 6f429223 ("ixgbe: Add support for build_skb")

Signed-off-by: default avatarEmil Tantilov <emil.s.tantilov@intel.com>
Tested-by: default avatarKrishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 925f5690

drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c

+41 −0
Original line number Diff line number Diff line
@@ -910,6 +910,44 @@ static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter, 
	IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, qmask);

}



static struct sk_buff *ixgbevf_build_skb(struct ixgbevf_ring *rx_ring,

					 struct ixgbevf_rx_buffer *rx_buffer,

					 union ixgbe_adv_rx_desc *rx_desc,

					 unsigned int size)

{

	void *va = page_address(rx_buffer->page) + rx_buffer->page_offset;

#if (PAGE_SIZE < 8192)

	unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;

#else

	unsigned int truesize = SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) +

				SKB_DATA_ALIGN(IXGBEVF_SKB_PAD + size);

#endif

	struct sk_buff *skb;



	/* prefetch first cache line of first page */

	prefetch(va);

#if L1_CACHE_BYTES < 128

	prefetch(va + L1_CACHE_BYTES);

#endif



	/* build an skb to around the page buffer */

	skb = build_skb(va - IXGBEVF_SKB_PAD, truesize);

	if (unlikely(!skb))

		return NULL;



	/* update pointers within the skb to store the data */

	skb_reserve(skb, IXGBEVF_SKB_PAD);

	__skb_put(skb, size);



	/* update buffer offset */

#if (PAGE_SIZE < 8192)

	rx_buffer->page_offset ^= truesize;

#else

	rx_buffer->page_offset += truesize;

#endif



	return skb;

}

static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,

				struct ixgbevf_ring *rx_ring,

				int budget)
@@ -945,6 +983,9 @@ static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector, 
		/* retrieve a buffer from the ring */

		if (skb)

			ixgbevf_add_rx_frag(rx_ring, rx_buffer, skb, size);

		else if (ring_uses_build_skb(rx_ring))

			skb = ixgbevf_build_skb(rx_ring, rx_buffer,

						rx_desc, size);

		else

			skb = ixgbevf_construct_skb(rx_ring, rx_buffer,

						    rx_desc, size);