[I/OAT]: Structure changes for TCP recv offload to I/OAT

Adds an async_wait_queue and some additional fields to tcp_sock, and a
dma_cookie_t to sk_buff.

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 9 insertions, 0 deletions

diff --git a/include/net/sock.h b/include/net/sock.h
index c9fad6fb629..90c65cb091a 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -132,6 +132,7 @@ struct sock_common {
   *     @sk_receive_queue: incoming packets
   *     @sk_wmem_alloc: transmit queue bytes committed
   *     @sk_write_queue: Packet sending queue
+  *     @sk_async_wait_queue: DMA copied packets
   *     @sk_omem_alloc: "o" is "option" or "other"
   *     @sk_wmem_queued: persistent queue size
   *     @sk_forward_alloc: space allocated forward
@@ -205,6 +206,7 @@ struct sock {
         atomic_t                sk_omem_alloc;
         struct sk_buff_head     sk_receive_queue;
         struct sk_buff_head     sk_write_queue;
+        struct sk_buff_head     sk_async_wait_queue;
         int                     sk_wmem_queued;
         int                     sk_forward_alloc;
         gfp_t                   sk_allocation;
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 3c989db8a7a..d0c2c2fa758 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -28,6 +28,7 @@
 #include <linux/cache.h>
 #include <linux/percpu.h>
 #include <linux/skbuff.h>
+#include <linux/dmaengine.h>
 
 #include <net/inet_connection_sock.h>
 #include <net/inet_timewait_sock.h>
@@ -817,6 +818,12 @@ static inline void tcp_prequeue_init(struct tcp_sock *tp)
         tp->ucopy.len = 0;
         tp->ucopy.memory = 0;
         skb_queue_head_init(&tp->ucopy.prequeue);
+#ifdef CONFIG_NET_DMA
+        tp->ucopy.dma_chan = NULL;
+        tp->ucopy.wakeup = 0;
+        tp->ucopy.pinned_list = NULL;
+        tp->ucopy.dma_cookie = 0;
+#endif
 }
 
 /* Packet is added to VJ-style prequeue for processing in process