[Intel-wired-lan] [PATCH v2 5/5] i40e: Add geneve tunnel offload support

Anjali Singhai Jain anjali.singhai at intel.com
Tue Sep 8 21:55:56 UTC 2015


This patch adds driver hooks to implement ndo_ops to add/del udp
port in the HW to identify GENEVE tunnels.

Signed-off-by: Anjali Singhai Jain <anjali.singhai at intel.com>
Signed-off-by: Kiran Patil <kiran.patil at intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e.h      |  1 +
 drivers/net/ethernet/intel/i40e/i40e_main.c | 22 ++++++++++++++++------
 drivers/net/ethernet/intel/i40e/i40e_txrx.c |  2 +-
 3 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index 71752c6..12c96da 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -330,6 +330,7 @@ struct i40e_pf {
 #define I40E_FLAG_VEB_STATS_ENABLED		BIT_ULL(37)
 #define I40E_FLAG_MULTIPLE_TCP_UDP_RSS_PCTYPE	BIT_ULL(38)
 #define I40E_FLAG_VEB_MODE_ENABLED		BIT_ULL(40)
+#define I40E_FLAG_GENEVE_OFFLOAD_CAPABLE	BIT_ULL(41)
 
 	/* tracks features that get auto disabled by errors */
 	u64 auto_disable_flags;
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index b3a6cdf..9bbafc3 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -31,6 +31,9 @@
 #if IS_ENABLED(CONFIG_VXLAN)
 #include <net/vxlan.h>
 #endif
+#if IS_ENABLED(CONFIG_GENEVE)
+#include <net/geneve.h>
+#endif
 
 const char i40e_driver_name[] = "i40e";
 static const char i40e_driver_string[] =
@@ -6665,7 +6668,7 @@ static void i40e_handle_mdd_event(struct i40e_pf *pf)
  **/
 static void i40e_sync_udp_filters_subtask(struct i40e_pf *pf)
 {
-#if IS_ENABLED(CONFIG_VXLAN)
+#if IS_ENABLED(CONFIG_VXLAN) || IS_ENABLED(CONFIG_GENEVE)
 	struct i40e_hw *hw = &pf->hw;
 	i40e_status ret;
 	__be16 port;
@@ -7843,7 +7846,8 @@ static int i40e_sw_init(struct i40e_pf *pf)
 			     I40E_FLAG_HW_ATR_EVICT_CAPABLE |
 			     I40E_FLAG_OUTER_UDP_CSUM_CAPABLE |
 			     I40E_FLAG_WB_ON_ITR_CAPABLE |
-			     I40E_FLAG_MULTIPLE_TCP_UDP_RSS_PCTYPE;
+			     I40E_FLAG_MULTIPLE_TCP_UDP_RSS_PCTYPE |
+			     I40E_FLAG_GENEVE_OFFLOAD_CAPABLE;
 	}
 	pf->eeprom_version = 0xDEAD;
 	pf->lan_veb = I40E_NO_VEB;
@@ -7972,14 +7976,18 @@ static void i40e_add_tunnel_port(struct net_device *netdev,
 				 sa_family_t sa_family, __be16 port,
 				 u32 type)
 {
-#if IS_ENABLED(CONFIG_VXLAN)
+#if IS_ENABLED(CONFIG_VXLAN) || IS_ENABLED(CONFIG_GENEVE)
 	struct i40e_netdev_priv *np = netdev_priv(netdev);
 	struct i40e_vsi *vsi = np->vsi;
 	struct i40e_pf *pf = vsi->back;
 	u8 next_idx;
 	u8 idx;
 
-	if (type != UDP_TUNNEL_VXLAN)
+	if (!(type == UDP_TUNNEL_VXLAN || type == UDP_TUNNEL_GENEVE))
+		return;
+
+	if ((type == UDP_TUNNEL_GENEVE) &&
+	    (!(pf->flags & I40E_FLAG_GENEVE_OFFLOAD_CAPABLE)))
 		return;
 
 	if (sa_family == AF_INET6)
@@ -8007,6 +8015,8 @@ static void i40e_add_tunnel_port(struct net_device *netdev,
 	pf->udp_ports[next_idx].index = port;
 	if (type == UDP_TUNNEL_VXLAN)
 		pf->udp_ports[next_idx].type = I40E_AQC_TUNNEL_TYPE_VXLAN;
+	else if (type == UDP_TUNNEL_GENEVE)
+		pf->udp_ports[next_idx].type = I40E_AQC_TUNNEL_TYPE_NGE;
 
 	pf->pending_udp_bitmap |= BIT_ULL(next_idx);
 	pf->flags |= I40E_FLAG_UDP_FILTER_SYNC;
@@ -8024,7 +8034,7 @@ static void i40e_del_tunnel_port(struct net_device *netdev,
 				 sa_family_t sa_family, __be16 port,
 				 u32 type)
 {
-#if IS_ENABLED(CONFIG_VXLAN)
+#if IS_ENABLED(CONFIG_VXLAN) || IS_ENABLED(CONFIG_GENEVE)
 	struct i40e_netdev_priv *np = netdev_priv(netdev);
 	struct i40e_vsi *vsi = np->vsi;
 	struct i40e_pf *pf = vsi->back;
@@ -8228,7 +8238,7 @@ static int i40e_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 				       nlflags, 0, 0, filter_mask, NULL);
 }
 
-#define I40E_MAX_TUNNEL_HDR_LEN 80
+#define I40E_MAX_TUNNEL_HDR_LEN 260
 /**
  * i40e_features_check - Validate encapsulated packet conforms to limits
  * @skb: skb buff
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
index 424c5cc..b93c2dc 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
@@ -1425,7 +1425,7 @@ static inline void i40e_rx_checksum(struct i40e_vsi *vsi,
 	if (rx_error & BIT(I40E_RX_DESC_ERROR_PPRS_SHIFT))
 		return;
 
-	/* If VXLAN traffic has an outer UDPv4 checksum we need to check
+	/* If VXLAN/GENEVE traffic has an outer UDPv4 checksum we need to check
 	 * it in the driver, hardware does not do it for us.
 	 * Since L3L4P bit was set we assume a valid IHL value (>=5)
 	 * so the total length of IPv4 header is IHL*4 bytes
-- 
1.8.1.4



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