net: Add SKB DMA mapping helper functions.

[linux-2.6-omap-h63xx.git] / include / linux / skbuff.h

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 358661c9990e85a0b3c523a72606ee86411c1b57..aa80ad9cbc88466e681a2d3a9e97e27889f061a9 100644 (file)
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -146,8 +146,14 @@ struct skb_shared_info {
        unsigned short  gso_segs;
        unsigned short  gso_type;
        __be32          ip6_frag_id;
+#ifdef CONFIG_HAS_DMA
+       unsigned int    num_dma_maps;
+#endif
        struct sk_buff  *frag_list;
        skb_frag_t      frags[MAX_SKB_FRAGS];
+#ifdef CONFIG_HAS_DMA
+       dma_addr_t      dma_maps[MAX_SKB_FRAGS + 1];
+#endif
 };
 
 /* We divide dataref into two halves.  The higher 16 bits hold references
@@ -353,6 +359,14 @@ struct sk_buff {
 
 #include <asm/system.h>
 
+#ifdef CONFIG_HAS_DMA
+#include <linux/dma-mapping.h>
+extern int skb_dma_map(struct device *dev, struct sk_buff *skb,
+                      enum dma_data_direction dir);
+extern void skb_dma_unmap(struct device *dev, struct sk_buff *skb,
+                         enum dma_data_direction dir);
+#endif
+
 extern void kfree_skb(struct sk_buff *skb);
 extern void           __kfree_skb(struct sk_buff *skb);
 extern struct sk_buff *__alloc_skb(unsigned int size,
@@ -1452,6 +1466,10 @@ extern int              skb_copy_datagram_iovec(const struct sk_buff *from,
 extern int            skb_copy_and_csum_datagram_iovec(struct sk_buff *skb,
                                                        int hlen,
                                                        struct iovec *iov);
+extern int            skb_copy_datagram_from_iovec(struct sk_buff *skb,
+                                                   int offset,
+                                                   struct iovec *from,
+                                                   int len);
 extern void           skb_free_datagram(struct sock *sk, struct sk_buff *skb);
 extern int            skb_kill_datagram(struct sock *sk, struct sk_buff *skb,
                                         unsigned int flags);