[PATCH v13 07/16] Modify netdev_alloc_page() to get external buffer

[xiaohui . xin]

From: Xin Xiaohui <xiaohui....@intel.com>

    Currently, it can get external buffers from mp device.

    Signed-off-by: Xin Xiaohui <xiaohui....@intel.com>
    Signed-off-by: Zhao Yu <yzhao81...@gmail.com>
    Reviewed-by: Jeff Dike <jd...@linux.intel.com>
---
 net/core/skbuff.c |   27 +++++++++++++++++++++++++++
 1 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 5e6d69c..f39d372 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -262,11 +262,38 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev,
 }
 EXPORT_SYMBOL(__netdev_alloc_skb);
 
+struct page *netdev_alloc_ext_pages(struct net_device *dev, int npages)
+{
+       struct mp_port *port;
+       struct skb_ext_page *ext_page = NULL;
+
+       port = dev->mp_port;
+       if (!port)
+               goto out;
+       ext_page = port->ctor(port, NULL, npages);
+       if (ext_page)
+               return ext_page->page;
+out:
+       return NULL;
+
+}
+EXPORT_SYMBOL(netdev_alloc_ext_pages);
+
+struct page *netdev_alloc_ext_page(struct net_device *dev)
+{
+       return netdev_alloc_ext_pages(dev, 1);
+
+}
+EXPORT_SYMBOL(netdev_alloc_ext_page);
+
 struct page *__netdev_alloc_page(struct net_device *dev, gfp_t gfp_mask)
 {
        int node = dev->dev.parent ? dev_to_node(dev->dev.parent) : -1;
        struct page *page;
 
+       if (dev_is_mpassthru(dev))
+               return netdev_alloc_ext_page(dev);
+
        page = alloc_pages_node(node, gfp_mask, 0);
        return page;
 }
-- 
1.7.3

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