[PATCH net-next v2 4/4] net: qualcomm: rmnet: Add support for GRO

[Subash Abhinov Kasiviswanathan]

Add gro_cells so that rmnet devices can call gro_cells_receive
instead of netif_receive_skb.

Signed-off-by: Subash Abhinov Kasiviswanathan <subas...@codeaurora.org>
Cc: Eric Dumazet <eduma...@google.com>
---
 drivers/net/ethernet/qualcomm/rmnet/Kconfig          | 1 +
 drivers/net/ethernet/qualcomm/rmnet/rmnet_config.h   | 2 ++
 drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c | 4 +++-
 drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c      | 8 ++++++++
 4 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/qualcomm/rmnet/Kconfig 
b/drivers/net/ethernet/qualcomm/rmnet/Kconfig
index 6e2587a..9bb06d2 100644
--- a/drivers/net/ethernet/qualcomm/rmnet/Kconfig
+++ b/drivers/net/ethernet/qualcomm/rmnet/Kconfig
@@ -5,6 +5,7 @@
 menuconfig RMNET
        tristate "RmNet MAP driver"
        default n
+       select GRO_CELLS
        ---help---
          If you select this, you will enable the RMNET module which is used
          for handling data in the multiplexing and aggregation protocol (MAP)
diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.h 
b/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.h
index 9586703d..c19259e 100644
--- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.h
+++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.h
@@ -14,6 +14,7 @@
  */
 
 #include <linux/skbuff.h>
+#include <net/gro_cells.h>
 
 #ifndef _RMNET_CONFIG_H_
 #define _RMNET_CONFIG_H_
@@ -58,6 +59,7 @@ struct rmnet_priv {
        u8 mux_id;
        struct net_device *real_dev;
        struct rmnet_pcpu_stats __percpu *pcpu_stats;
+       struct gro_cells gro_cells;
 };
 
 struct rmnet_port *rmnet_get_port(struct net_device *real_dev);
diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c 
b/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c
index 1ea9783..29842cc 100644
--- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c
+++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c
@@ -46,13 +46,15 @@ static void rmnet_set_skb_proto(struct sk_buff *skb)
 static void
 rmnet_deliver_skb(struct sk_buff *skb)
 {
+       struct rmnet_priv *priv = netdev_priv(skb->dev);
+
        skb_reset_transport_header(skb);
        skb_reset_network_header(skb);
        rmnet_vnd_rx_fixup(skb, skb->dev);
 
        skb->pkt_type = PACKET_HOST;
        skb_set_mac_header(skb, 0);
-       netif_receive_skb(skb);
+       gro_cells_receive(&priv->gro_cells, skb);
 }
 
 /* MAP handler */
diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c 
b/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c
index b0befa1..9caa5e3 100644
--- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c
+++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c
@@ -87,11 +87,18 @@ static int rmnet_vnd_get_iflink(const struct net_device 
*dev)
 static int rmnet_vnd_init(struct net_device *dev)
 {
        struct rmnet_priv *priv = netdev_priv(dev);
+       int err;
 
        priv->pcpu_stats = alloc_percpu(struct rmnet_pcpu_stats);
        if (!priv->pcpu_stats)
                return -ENOMEM;
 
+       err = gro_cells_init(&priv->gro_cells, dev);
+       if (err) {
+               free_percpu(priv->pcpu_stats);
+               return err;
+       }
+
        return 0;
 }
 
@@ -99,6 +106,7 @@ static void rmnet_vnd_uninit(struct net_device *dev)
 {
        struct rmnet_priv *priv = netdev_priv(dev);
 
+       gro_cells_destroy(&priv->gro_cells);
        free_percpu(priv->pcpu_stats);
 }
 
-- 
1.9.1