ixgbevf: add function for checking if we can reuse page

Introduce ixgbevf_can_reuse_page() similar to the change in ixgbe from
commit af43da0dba0b
("ixgbe: Add function for checking to see if we can reuse page")

Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
index ed5c3ae..7ffd429 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
@@ -754,6 +754,38 @@ static inline bool ixgbevf_page_is_reserved(struct page *page)
        return (page_to_nid(page) != numa_mem_id()) || page_is_pfmemalloc(page);
 }
 
+static bool ixgbevf_can_reuse_rx_page(struct ixgbevf_rx_buffer *rx_buffer,
+                                     struct page *page,
+                                     const unsigned int truesize)
+{
+       /* avoid re-using remote pages */
+       if (unlikely(ixgbevf_page_is_reserved(page)))
+               return false;
+
+#if (PAGE_SIZE < 8192)
+       /* if we are only owner of page we can reuse it */
+       if (unlikely(page_count(page) != 1))
+               return false;
+
+       /* flip page offset to other buffer */
+       rx_buffer->page_offset ^= IXGBEVF_RX_BUFSZ;
+
+#else
+       /* move offset up to the next cache line */
+       rx_buffer->page_offset += truesize;
+
+       if (rx_buffer->page_offset > (PAGE_SIZE - IXGBEVF_RX_BUFSZ))
+               return false;
+
+#endif
+       /* Even if we own the page, we are not allowed to use atomic_set()
+        * This would break get_page_unless_zero() users.
+        */
+       page_ref_inc(page);
+
+       return true;
+}
+
 /**
  * ixgbevf_add_rx_frag - Add contents of Rx buffer to sk_buff
  * @rx_ring: rx descriptor ring to transact packets on
@@ -815,32 +847,7 @@ add_tail_frag:
        skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
                        (unsigned long)va & ~PAGE_MASK, size, truesize);
 
-       /* avoid re-using remote pages */
-       if (unlikely(ixgbevf_page_is_reserved(page)))
-               return false;
-
-#if (PAGE_SIZE < 8192)
-       /* if we are only owner of page we can reuse it */
-       if (unlikely(page_count(page) != 1))
-               return false;
-
-       /* flip page offset to other buffer */
-       rx_buffer->page_offset ^= IXGBEVF_RX_BUFSZ;
-
-#else
-       /* move offset up to the next cache line */
-       rx_buffer->page_offset += truesize;
-
-       if (rx_buffer->page_offset > (PAGE_SIZE - IXGBEVF_RX_BUFSZ))
-               return false;
-
-#endif
-       /* Even if we own the page, we are not allowed to use atomic_set()
-        * This would break get_page_unless_zero() users.
-        */
-       page_ref_inc(page);
-
-       return true;
+       return ixgbevf_can_reuse_rx_page(rx_buffer, page, truesize);
 }
 
 static struct sk_buff *ixgbevf_fetch_rx_buffer(struct ixgbevf_ring *rx_ring,