4 files changed, 40 insertions, 13 deletions

diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index cf2abeca92a0..c6310aef5ab0 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -411,6 +411,8 @@ struct ethtool_ops {
 #define ETHTOOL_GPERMADDR       0x00000020 /* Get permanent hardware address */
 #define ETHTOOL_GUFO            0x00000021 /* Get UFO enable (ethtool_value) */
 #define ETHTOOL_SUFO            0x00000022 /* Set UFO enable (ethtool_value) */
+#define ETHTOOL_GGSO            0x00000023 /* Get GSO enable (ethtool_value) */
+#define ETHTOOL_SGSO            0x00000024 /* Set GSO enable (ethtool_value) */
 
 /* compatibility with older code */
 #define SPARC_ETH_GSET          ETHTOOL_GSET
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index cead6be467ed..bc747e5d7138 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -308,9 +308,13 @@ struct net_device
 #define NETIF_F_HW_VLAN_RX      256     /* Receive VLAN hw acceleration */
 #define NETIF_F_HW_VLAN_FILTER  512     /* Receive filtering on VLAN */
 #define NETIF_F_VLAN_CHALLENGED 1024    /* Device cannot handle VLAN packets */
-#define NETIF_F_TSO             2048    /* Can offload TCP/IP segmentation */
+#define NETIF_F_GSO             2048    /* Enable software GSO. */
 #define NETIF_F_LLTX            4096    /* LockLess TX */
-#define NETIF_F_UFO             8192    /* Can offload UDP Large Send*/
+
+        /* Segmentation offload features */
+#define NETIF_F_GSO_SHIFT       16
+#define NETIF_F_TSO             (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
+#define NETIF_F_UFO             (SKB_GSO_UDPV4 << NETIF_F_GSO_SHIFT)
 
 #define NETIF_F_GEN_CSUM        (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
 #define NETIF_F_ALL_CSUM        (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM)
@@ -402,6 +406,9 @@ struct net_device
         struct list_head        qdisc_list;
         unsigned long           tx_queue_len;   /* Max frames per queue allowed */
 
+        /* Partially transmitted GSO packet. */
+        struct sk_buff          *gso_skb;
+
         /* ingress path synchronizer */
         spinlock_t              ingress_lock;
         struct Qdisc            *qdisc_ingress;
@@ -536,6 +543,7 @@ struct packet_type {
                                          struct net_device *,
                                          struct packet_type *,
                                          struct net_device *);
+        struct sk_buff          *(*gso_segment)(struct sk_buff *skb, int sg);
         void                    *af_packet_priv;
         struct list_head        list;
 };
@@ -686,7 +694,8 @@ extern int		dev_change_name(struct net_device *, char *);
 extern int              dev_set_mtu(struct net_device *, int);
 extern int              dev_set_mac_address(struct net_device *,
                                             struct sockaddr *);
-extern void             dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
+extern int              dev_hard_start_xmit(struct sk_buff *skb,
+                                            struct net_device *dev);
 
 extern void             dev_init(void);
 
@@ -960,6 +969,7 @@ extern int		netdev_max_backlog;
 extern int              weight_p;
 extern int              netdev_set_master(struct net_device *dev, struct net_device *master);
 extern int skb_checksum_help(struct sk_buff *skb, int inward);
+extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int sg);
 #ifdef CONFIG_BUG
 extern void netdev_rx_csum_fault(struct net_device *dev);
 #else
@@ -979,6 +989,13 @@ extern void dev_seq_stop(struct seq_file *seq, void *v);
 
 extern void linkwatch_run_queue(void);
 
+static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
+{
+        int feature = skb_shinfo(skb)->gso_type << NETIF_F_GSO_SHIFT;
+        return skb_shinfo(skb)->gso_size &&
+               (dev->features & feature) != feature;
+}
+
 #endif /* __KERNEL__ */
 
 #endif  /* _LINUX_DEV_H */
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 66f8819f9568..16eef03ce0eb 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -134,9 +134,10 @@ struct skb_frag_struct {
 struct skb_shared_info {
         atomic_t        dataref;
         unsigned short  nr_frags;
-        unsigned short  tso_size;
-        unsigned short  tso_segs;
-        unsigned short  ufo_size;
+        unsigned short  gso_size;
+        /* Warning: this field is not always filled in (UFO)! */
+        unsigned short  gso_segs;
+        unsigned short  gso_type;
         unsigned int    ip6_frag_id;
         struct sk_buff  *frag_list;
         skb_frag_t      frags[MAX_SKB_FRAGS];
@@ -168,6 +169,11 @@ enum {
         SKB_FCLONE_CLONE,
 };
 
+enum {
+        SKB_GSO_TCPV4 = 1 << 0,
+        SKB_GSO_UDPV4 = 1 << 1,
+};
+
 /** 
  *      struct sk_buff - socket buffer
  *      @next: Next buffer in list
@@ -209,6 +215,8 @@ enum {
  *      @nf_bridge: Saved data about a bridged frame - see br_netfilter.c
  *      @tc_index: Traffic control index
  *      @tc_verd: traffic control verdict
+ *      @dma_cookie: a cookie to one of several possible DMA operations
+ *              done by skb DMA functions
  *      @secmark: security marking
  */
 
@@ -345,7 +353,7 @@ extern struct sk_buff *skb_realloc_headroom(struct sk_buff *skb,
 extern struct sk_buff *skb_copy_expand(const struct sk_buff *skb,
                                        int newheadroom, int newtailroom,
                                        gfp_t priority);
-extern struct sk_buff *         skb_pad(struct sk_buff *skb, int pad);
+extern int             skb_pad(struct sk_buff *skb, int pad);
 #define dev_kfree_skb(a)        kfree_skb(a)
 extern void           skb_over_panic(struct sk_buff *skb, int len,
                                      void *here);
@@ -1122,16 +1130,15 @@ static inline int skb_cow(struct sk_buff *skb, unsigned int headroom)
  *
  *      Pads up a buffer to ensure the trailing bytes exist and are
  *      blanked. If the buffer already contains sufficient data it
- *      is untouched. Returns the buffer, which may be a replacement
- *      for the original, or NULL for out of memory - in which case
- *      the original buffer is still freed.
+ *      is untouched. Otherwise it is extended. Returns zero on
+ *      success. The skb is freed on error.
  */
  
-static inline struct sk_buff *skb_padto(struct sk_buff *skb, unsigned int len)
+static inline int skb_padto(struct sk_buff *skb, unsigned int len)
 {
         unsigned int size = skb->len;
         if (likely(size >= len))
-                return skb;
+                return 0;
         return skb_pad(skb, len-size);
 }
 
@@ -1292,6 +1299,7 @@ extern void	       skb_split(struct sk_buff *skb,
                                  struct sk_buff *skb1, const u32 len);
 
 extern void            skb_release_data(struct sk_buff *skb);
+extern struct sk_buff *skb_segment(struct sk_buff *skb, int sg);
 
 static inline void *skb_header_pointer(const struct sk_buff *skb, int offset,
                                        int len, void *buffer)
diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 420a689c3fb4..8ebf497907f8 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -18,7 +18,6 @@
 #define _LINUX_TCP_H
 
 #include <linux/types.h>
-#include <linux/dmaengine.h>
 #include <asm/byteorder.h>
 
 struct tcphdr {
@@ -161,6 +160,7 @@ struct tcp_info
 #ifdef __KERNEL__
 
 #include <linux/skbuff.h>
+#include <linux/dmaengine.h>
 #include <net/sock.h>
 #include <net/inet_connection_sock.h>
 #include <net/inet_timewait_sock.h>