ixgbe: Add support for VXLAN RX offloads

Add support for VXLAN RX offloads for the X55x devices that support
them.

Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
index ac3ac2a..8830c0f 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
@@ -630,6 +630,7 @@ struct ixgbe_adapter {
 #define IXGBE_FLAG_FCOE_ENABLED                 (u32)(1 << 21)
 #define IXGBE_FLAG_SRIOV_CAPABLE                (u32)(1 << 22)
 #define IXGBE_FLAG_SRIOV_ENABLED                (u32)(1 << 23)
+#define IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE       BIT(24)
 
        u32 flags2;
 #define IXGBE_FLAG2_RSC_CAPABLE                 (u32)(1 << 0)
@@ -644,6 +645,9 @@ struct ixgbe_adapter {
 #define IXGBE_FLAG2_RSS_FIELD_IPV6_UDP         (u32)(1 << 9)
 #define IXGBE_FLAG2_PTP_PPS_ENABLED            (u32)(1 << 10)
 #define IXGBE_FLAG2_PHY_INTERRUPT              (u32)(1 << 11)
+#ifdef CONFIG_IXGBE_VXLAN
+#define IXGBE_FLAG2_VXLAN_REREG_NEEDED         BIT(12)
+#endif
 
        /* Tx fast path data */
        int num_tx_queues;
@@ -757,7 +761,9 @@ struct ixgbe_adapter {
        u32 timer_event_accumulator;
        u32 vferr_refcount;
        struct ixgbe_mac_addr *mac_table;
+#ifdef CONFIG_IXGBE_VXLAN
        u16 vxlan_port;
+#endif
        struct kobject *info_kobj;
 #ifdef CONFIG_IXGBE_HWMON
        struct hwmon_buff *ixgbe_hwmon_buff;

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
index d910442..dd7062f 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
@@ -1519,20 +1519,28 @@ static u32 ixgbe_atr_compute_sig_hash_82599(union ixgbe_atr_hash_dword input,
  *  @input: unique input dword
  *  @common: compressed common input dword
  *  @queue: queue index to direct traffic to
+ *
+ * Note that the tunnel bit in input must not be set when the hardware
+ * tunneling support does not exist.
  **/
 s32 ixgbe_fdir_add_signature_filter_82599(struct ixgbe_hw *hw,
                                          union ixgbe_atr_hash_dword input,
                                          union ixgbe_atr_hash_dword common,
                                          u8 queue)
 {
-       u64  fdirhashcmd;
-       u32  fdircmd;
+       u64 fdirhashcmd;
+       u8 flow_type;
+       bool tunnel;
+       u32 fdircmd;
 
        /*
         * Get the flow_type in order to program FDIRCMD properly
         * lowest 2 bits are FDIRCMD.L4TYPE, third lowest bit is FDIRCMD.IPV6
         */
-       switch (input.formatted.flow_type) {
+       tunnel = !!(input.formatted.flow_type & IXGBE_ATR_L4TYPE_TUNNEL_MASK);
+       flow_type = input.formatted.flow_type &
+                   (IXGBE_ATR_L4TYPE_TUNNEL_MASK - 1);
+       switch (flow_type) {
        case IXGBE_ATR_FLOW_TYPE_TCPV4:
        case IXGBE_ATR_FLOW_TYPE_UDPV4:
        case IXGBE_ATR_FLOW_TYPE_SCTPV4:
@@ -1548,8 +1556,10 @@ s32 ixgbe_fdir_add_signature_filter_82599(struct ixgbe_hw *hw,
        /* configure FDIRCMD register */
        fdircmd = IXGBE_FDIRCMD_CMD_ADD_FLOW | IXGBE_FDIRCMD_FILTER_UPDATE |
                  IXGBE_FDIRCMD_LAST | IXGBE_FDIRCMD_QUEUE_EN;
-       fdircmd |= input.formatted.flow_type << IXGBE_FDIRCMD_FLOW_TYPE_SHIFT;
+       fdircmd |= (u32)flow_type << IXGBE_FDIRCMD_FLOW_TYPE_SHIFT;
        fdircmd |= (u32)queue << IXGBE_FDIRCMD_RX_QUEUE_SHIFT;
+       if (tunnel)
+               fdircmd |= IXGBE_FDIRCMD_TUNNEL_FILTER;
 
        /*
         * The lower 32-bits of fdirhashcmd is for FDIRHASH, the upper 32-bits

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 900562e..dcf849d 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -1,7 +1,7 @@
 /*******************************************************************************
 
   Intel 10 Gigabit PCI Express Linux driver
-  Copyright(c) 1999 - 2014 Intel Corporation.
+  Copyright(c) 1999 - 2015 Intel Corporation.
 
   This program is free software; you can redistribute it and/or modify it
   under the terms and conditions of the GNU General Public License,
@@ -65,6 +65,9 @@
 #include "ixgbe_common.h"
 #include "ixgbe_dcb_82599.h"
 #include "ixgbe_sriov.h"
+#ifdef CONFIG_IXGBE_VXLAN
+#include <net/vxlan.h>
+#endif
 
 char ixgbe_driver_name[] = "ixgbe";
 static const char ixgbe_driver_string[] =
@@ -79,7 +82,7 @@ static char ixgbe_default_device_descr[] =
 #define DRV_VERSION "4.0.1-k"
 const char ixgbe_driver_version[] = DRV_VERSION;
 static const char ixgbe_copyright[] =
-                               "Copyright (c) 1999-2014 Intel Corporation.";
+                               "Copyright (c) 1999-2015 Intel Corporation.";
 
 static const char ixgbe_overheat_msg[] = "Network adapter has been stopped because it has over heated. Restart the computer. If the problem persists, power off the system and replace the adapter";
 
@@ -1430,7 +1433,6 @@ static inline void ixgbe_rx_checksum(struct ixgbe_ring *ring,
            (hdr_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_TUNNEL >> 16))) {
                encap_pkt = true;
                skb->encapsulation = 1;
-               skb->ip_summed = CHECKSUM_NONE;
        }
 
        /* if IP and error */
@@ -4261,6 +4263,21 @@ static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
        }
 }
 
+static void ixgbe_clear_vxlan_port(struct ixgbe_adapter *adapter)
+{
+       switch (adapter->hw.mac.type) {
+       case ixgbe_mac_X550:
+       case ixgbe_mac_X550EM_x:
+               IXGBE_WRITE_REG(&adapter->hw, IXGBE_VXLANCTRL, 0);
+#ifdef CONFIG_IXGBE_VXLAN
+               adapter->vxlan_port = 0;
+#endif
+               break;
+       default:
+               break;
+       }
+}
+
 #ifdef CONFIG_IXGBE_DCB
 /**
  * ixgbe_configure_dcb - Configure DCB hardware
@@ -5302,6 +5319,9 @@ static int ixgbe_sw_init(struct ixgbe_adapter *adapter)
 #ifdef CONFIG_IXGBE_DCA
                adapter->flags &= ~IXGBE_FLAG_DCA_CAPABLE;
 #endif
+#ifdef CONFIG_IXGBE_VXLAN
+               adapter->flags |= IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE;
+#endif
                break;
        default:
                break;
@@ -5753,10 +5773,11 @@ static int ixgbe_open(struct net_device *netdev)
 
        ixgbe_up_complete(adapter);
 
-#if IS_ENABLED(CONFIG_IXGBE_VXLAN)
+       ixgbe_clear_vxlan_port(adapter);
+#ifdef CONFIG_IXGBE_VXLAN
        vxlan_get_rx_port(netdev);
-
 #endif
+
        return 0;
 
 err_set_queues:
@@ -6816,6 +6837,12 @@ static void ixgbe_service_task(struct work_struct *work)
                ixgbe_service_event_complete(adapter);
                return;
        }
+#ifdef CONFIG_IXGBE_VXLAN
+       if (adapter->flags2 & IXGBE_FLAG2_VXLAN_REREG_NEEDED) {
+               adapter->flags2 &= ~IXGBE_FLAG2_VXLAN_REREG_NEEDED;
+               vxlan_get_rx_port(adapter->netdev);
+       }
+#endif /* CONFIG_IXGBE_VXLAN */
        ixgbe_reset_subtask(adapter);
        ixgbe_phy_interrupt_subtask(adapter);
        ixgbe_sfp_detection_subtask(adapter);
@@ -7240,6 +7267,10 @@ static void ixgbe_atr(struct ixgbe_ring *ring,
                struct ipv6hdr *ipv6;
        } hdr;
        struct tcphdr *th;
+       struct sk_buff *skb;
+#ifdef CONFIG_IXGBE_VXLAN
+       u8 encap = false;
+#endif /* CONFIG_IXGBE_VXLAN */
        __be16 vlan_id;
 
        /* if ring doesn't have a interrupt vector, cannot perform ATR */
@@ -7253,16 +7284,36 @@ static void ixgbe_atr(struct ixgbe_ring *ring,
        ring->atr_count++;
 
        /* snag network header to get L4 type and address */
-       hdr.network = skb_network_header(first->skb);
+       skb = first->skb;
+       hdr.network = skb_network_header(skb);
+       if (skb->encapsulation) {
+#ifdef CONFIG_IXGBE_VXLAN
+               struct ixgbe_adapter *adapter = q_vector->adapter;
 
-       /* Currently only IPv4/IPv6 with TCP is supported */
-       if ((first->protocol != htons(ETH_P_IPV6) ||
-            hdr.ipv6->nexthdr != IPPROTO_TCP) &&
-           (first->protocol != htons(ETH_P_IP) ||
-            hdr.ipv4->protocol != IPPROTO_TCP))
+               if (!adapter->vxlan_port)
+                       return;
+               if (first->protocol != htons(ETH_P_IP) ||
+                   hdr.ipv4->version != IPVERSION ||
+                   hdr.ipv4->protocol != IPPROTO_UDP) {
+                       return;
+               }
+               if (ntohs(udp_hdr(skb)->dest) != adapter->vxlan_port)
+                       return;
+               encap = true;
+               hdr.network = skb_inner_network_header(skb);
+               th = inner_tcp_hdr(skb);
+#else
                return;
-
-       th = tcp_hdr(first->skb);
+#endif /* CONFIG_IXGBE_VXLAN */
+       } else {
+               /* Currently only IPv4/IPv6 with TCP is supported */
+               if ((first->protocol != htons(ETH_P_IPV6) ||
+                    hdr.ipv6->nexthdr != IPPROTO_TCP) &&
+                   (first->protocol != htons(ETH_P_IP) ||
+                    hdr.ipv4->protocol != IPPROTO_TCP))
+                       return;
+               th = tcp_hdr(skb);
+       }
 
        /* skip this packet since it is invalid or the socket is closing */
        if (!th || th->fin)
@@ -7311,6 +7362,11 @@ static void ixgbe_atr(struct ixgbe_ring *ring,
                             hdr.ipv6->daddr.s6_addr32[3];
        }
 
+#ifdef CONFIG_IXGBE_VXLAN
+       if (encap)
+               input.formatted.flow_type |= IXGBE_ATR_L4TYPE_TUNNEL_MASK;
+#endif /* CONFIG_IXGBE_VXLAN */
+
        /* This assumes the Rx queue and Tx queue are bound to the same CPU */
        ixgbe_fdir_add_signature_filter_82599(&q_vector->adapter->hw,
                                              input, common, ring->queue_index);
@@ -7937,12 +7993,23 @@ static int ixgbe_set_features(struct net_device *netdev,
                need_reset = true;
 
        netdev->features = features;
+
+#ifdef CONFIG_IXGBE_VXLAN
+       if ((adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE)) {
+               if (features & NETIF_F_RXCSUM)
+                       adapter->flags2 |= IXGBE_FLAG2_VXLAN_REREG_NEEDED;
+               else
+                       ixgbe_clear_vxlan_port(adapter);
+       }
+#endif /* CONFIG_IXGBE_VXLAN */
+
        if (need_reset)
                ixgbe_do_reset(netdev);
 
        return 0;
 }
 
+#ifdef CONFIG_IXGBE_VXLAN
 /**
  * ixgbe_add_vxlan_port - Get notifications about VXLAN ports that come up
  * @dev: The port's netdev
@@ -7956,17 +8023,18 @@ static void ixgbe_add_vxlan_port(struct net_device *dev, sa_family_t sa_family,
        struct ixgbe_hw *hw = &adapter->hw;
        u16 new_port = ntohs(port);
 
+       if (!(adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE))
+               return;
+
        if (sa_family == AF_INET6)
                return;
 
-       if (adapter->vxlan_port == new_port) {
-               netdev_info(dev, "Port %d already offloaded\n", new_port);
+       if (adapter->vxlan_port == new_port)
                return;
-       }
 
        if (adapter->vxlan_port) {
                netdev_info(dev,
-                           "Hit Max num of UDP ports, not adding port %d\n",
+                           "Hit Max num of VXLAN ports, not adding port %d\n",
                            new_port);
                return;
        }
@@ -7985,9 +8053,11 @@ static void ixgbe_del_vxlan_port(struct net_device *dev, sa_family_t sa_family,
                                 __be16 port)
 {
        struct ixgbe_adapter *adapter = netdev_priv(dev);
-       struct ixgbe_hw *hw = &adapter->hw;
        u16 new_port = ntohs(port);
 
+       if (!(adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE))
+               return;
+
        if (sa_family == AF_INET6)
                return;
 
@@ -7997,9 +8067,10 @@ static void ixgbe_del_vxlan_port(struct net_device *dev, sa_family_t sa_family,
                return;
        }
 
-       adapter->vxlan_port = 0;
-       IXGBE_WRITE_REG(hw, IXGBE_VXLANCTRL, 0);
+       ixgbe_clear_vxlan_port(adapter);
+       adapter->flags2 |= IXGBE_FLAG2_VXLAN_REREG_NEEDED;
 }
+#endif /* CONFIG_IXGBE_VXLAN */
 
 static int ixgbe_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
                             struct net_device *dev,
@@ -8290,8 +8361,10 @@ static const struct net_device_ops ixgbe_netdev_ops = {
        .ndo_bridge_getlink     = ixgbe_ndo_bridge_getlink,
        .ndo_dfwd_add_station   = ixgbe_fwd_add,
        .ndo_dfwd_del_station   = ixgbe_fwd_del,
+#ifdef CONFIG_IXGBE_VXLAN
        .ndo_add_vxlan_port     = ixgbe_add_vxlan_port,
        .ndo_del_vxlan_port     = ixgbe_del_vxlan_port,
+#endif /* CONFIG_IXGBE_VXLAN */
        .ndo_features_check     = ixgbe_features_check,
 };
 
@@ -8658,14 +8731,18 @@ skip_sriov:
        netdev->priv_flags |= IFF_UNICAST_FLT;
        netdev->priv_flags |= IFF_SUPP_NOFCS;
 
+#ifdef CONFIG_IXGBE_VXLAN
        switch (adapter->hw.mac.type) {
        case ixgbe_mac_X550:
        case ixgbe_mac_X550EM_x:
-               netdev->hw_enc_features |= NETIF_F_RXCSUM;
+               netdev->hw_enc_features |= NETIF_F_RXCSUM |
+                                          NETIF_F_IP_CSUM |
+                                          NETIF_F_IPV6_CSUM;
                break;
        default:
                break;
        }
+#endif /* CONFIG_IXGBE_VXLAN */
 
 #ifdef CONFIG_IXGBE_DCB
        netdev->dcbnl_ops = &dcbnl_ops;

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
index 938a410..0e67824 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
@@ -2540,9 +2540,11 @@ enum ixgbe_fdir_pballoc_type {
 #define IXGBE_FDIRCMD_QUEUE_EN                  0x00008000
 #define IXGBE_FDIRCMD_FLOW_TYPE_SHIFT           5
 #define IXGBE_FDIRCMD_RX_QUEUE_SHIFT            16
+#define IXGBE_FDIRCMD_RX_TUNNEL_FILTER_SHIFT   23
 #define IXGBE_FDIRCMD_VT_POOL_SHIFT             24
 #define IXGBE_FDIR_INIT_DONE_POLL               10
 #define IXGBE_FDIRCMD_CMD_POLL                  10
+#define IXGBE_FDIRCMD_TUNNEL_FILTER            0x00800000
 
 #define IXGBE_FDIR_DROP_QUEUE                   127
 
@@ -2833,12 +2835,13 @@ typedef u32 ixgbe_link_speed;
 #define IXGBE_ATR_SIGNATURE_HASH_KEY 0x174D3614
 
 /* Software ATR input stream values and masks */
-#define IXGBE_ATR_HASH_MASK     0x7fff
-#define IXGBE_ATR_L4TYPE_MASK      0x3
-#define IXGBE_ATR_L4TYPE_UDP       0x1
-#define IXGBE_ATR_L4TYPE_TCP       0x2
-#define IXGBE_ATR_L4TYPE_SCTP      0x3
-#define IXGBE_ATR_L4TYPE_IPV6_MASK 0x4
+#define IXGBE_ATR_HASH_MASK            0x7fff
+#define IXGBE_ATR_L4TYPE_MASK          0x3
+#define IXGBE_ATR_L4TYPE_UDP           0x1
+#define IXGBE_ATR_L4TYPE_TCP           0x2
+#define IXGBE_ATR_L4TYPE_SCTP          0x3
+#define IXGBE_ATR_L4TYPE_IPV6_MASK     0x4
+#define IXGBE_ATR_L4TYPE_TUNNEL_MASK   0x10
 enum ixgbe_atr_flow_type {
        IXGBE_ATR_FLOW_TYPE_IPV4   = 0x0,
        IXGBE_ATR_FLOW_TYPE_UDPV4  = 0x1,