Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:

 1) New offloading infrastructure and example 'rocker' driver for
    offloading of switching and routing to hardware.

    This work was done by a large group of dedicated individuals, not
    limited to: Scott Feldman, Jiri Pirko, Thomas Graf, John Fastabend,
    Jamal Hadi Salim, Andy Gospodarek, Florian Fainelli, Roopa Prabhu

 2) Start making the networking operate on IOV iterators instead of
    modifying iov objects in-situ during transfers.  Thanks to Al Viro
    and Herbert Xu.

 3) A set of new netlink interfaces for the TIPC stack, from Richard
    Alpe.

 4) Remove unnecessary looping during ipv6 routing lookups, from Martin
    KaFai Lau.

 5) Add PAUSE frame generation support to gianfar driver, from Matei
    Pavaluca.

 6) Allow for larger reordering levels in TCP, which are easily
    achievable in the real world right now, from Eric Dumazet.

 7) Add a variable of napi_schedule that doesn't need to disable cpu
    interrupts, from Eric Dumazet.

 8) Use a doubly linked list to optimize neigh_parms_release(), from
    Nicolas Dichtel.

 9) Various enhancements to the kernel BPF verifier, and allow eBPF
    programs to actually be attached to sockets.  From Alexei
    Starovoitov.

10) Support TSO/LSO in sunvnet driver, from David L Stevens.

11) Allow controlling ECN usage via routing metrics, from Florian
    Westphal.

12) Remote checksum offload, from Tom Herbert.

13) Add split-header receive, BQL, and xmit_more support to amd-xgbe
    driver, from Thomas Lendacky.

14) Add MPLS support to openvswitch, from Simon Horman.

15) Support wildcard tunnel endpoints in ipv6 tunnels, from Steffen
    Klassert.

16) Do gro flushes on a per-device basis using a timer, from Eric
    Dumazet.  This tries to resolve the conflicting goals between the
    desired handling of bulk vs.  RPC-like traffic.

17) Allow userspace to ask for the CPU upon what a packet was
    received/steered, via SO_INCOMING_CPU.  From Eric Dumazet.

18) Limit GSO packets to half the current congestion window, from Eric
    Dumazet.

19) Add a generic helper so that all drivers set their RSS keys in a
    consistent way, from Eric Dumazet.

20) Add xmit_more support to enic driver, from Govindarajulu
    Varadarajan.

21) Add VLAN packet scheduler action, from Jiri Pirko.

22) Support configurable RSS hash functions via ethtool, from Eyal
    Perry.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1820 commits)
  Fix race condition between vxlan_sock_add and vxlan_sock_release
  net/macb: fix compilation warning for print_hex_dump() called with skb->mac_header
  net/mlx4: Add support for A0 steering
  net/mlx4: Refactor QUERY_PORT
  net/mlx4_core: Add explicit error message when rule doesn't meet configuration
  net/mlx4: Add A0 hybrid steering
  net/mlx4: Add mlx4_bitmap zone allocator
  net/mlx4: Add a check if there are too many reserved QPs
  net/mlx4: Change QP allocation scheme
  net/mlx4_core: Use tasklet for user-space CQ completion events
  net/mlx4_core: Mask out host side virtualization features for guests
  net/mlx4_en: Set csum level for encapsulated packets
  be2net: Export tunnel offloads only when a VxLAN tunnel is created
  gianfar: Fix dma check map error when DMA_API_DEBUG is enabled
  cxgb4/csiostor: Don't use MASTER_MUST for fw_hello call
  net: fec: only enable mdio interrupt before phy device link up
  net: fec: clear all interrupt events to support i.MX6SX
  net: fec: reset fep link status in suspend function
  net: sock: fix access via invalid file descriptor
  net: introduce helper macro for_each_cmsghdr
  ...

1 files changed, 44 insertions, 20 deletions

diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index 597c463e384d..2aacd4731051 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -887,7 +887,8 @@ static struct sk_buff *be_insert_vlan_in_pkt(struct be_adapter *adapter,
 	}
 
 	if (vlan_tag) {
-		skb = __vlan_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
+		skb = vlan_insert_tag_set_proto(skb, htons(ETH_P_8021Q),
+						vlan_tag);
 		if (unlikely(!skb))
 			return skb;
 		skb->vlan_tci = 0;
@@ -896,7 +897,8 @@ static struct sk_buff *be_insert_vlan_in_pkt(struct be_adapter *adapter,
 	/* Insert the outer VLAN, if any */
 	if (adapter->qnq_vid) {
 		vlan_tag = adapter->qnq_vid;
-		skb = __vlan_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
+		skb = vlan_insert_tag_set_proto(skb, htons(ETH_P_8021Q),
+						vlan_tag);
 		if (unlikely(!skb))
 			return skb;
 		if (skip_hw_vlan)
@@ -1015,9 +1017,8 @@ static struct sk_buff *be_xmit_workarounds(struct be_adapter *adapter,
 	 * to pad short packets (<= 32 bytes) to a 36-byte length.
 	 */
 	if (unlikely(!BEx_chip(adapter) && skb->len <= 32)) {
-		if (skb_padto(skb, 36))
+		if (skb_put_padto(skb, 36))
 			return NULL;
-		skb->len = 36;
 	}
 
 	if (BEx_chip(adapter) || lancer_chip(adapter)) {
@@ -2853,10 +2854,10 @@ static int be_close(struct net_device *netdev)
 
 static int be_rx_qs_create(struct be_adapter *adapter)
 {
+	struct rss_info *rss = &adapter->rss_info;
+	u8 rss_key[RSS_HASH_KEY_LEN];
 	struct be_rx_obj *rxo;
 	int rc, i, j;
-	u8 rss_hkey[RSS_HASH_KEY_LEN];
-	struct rss_info *rss = &adapter->rss_info;
 
 	for_all_rx_queues(adapter, rxo, i) {
 		rc = be_queue_alloc(adapter, &rxo->q, RX_Q_LEN,
@@ -2901,15 +2902,15 @@ static int be_rx_qs_create(struct be_adapter *adapter)
 		rss->rss_flags = RSS_ENABLE_NONE;
 	}
 
-	get_random_bytes(rss_hkey, RSS_HASH_KEY_LEN);
+	netdev_rss_key_fill(rss_key, RSS_HASH_KEY_LEN);
 	rc = be_cmd_rss_config(adapter, rss->rsstable, rss->rss_flags,
-			       128, rss_hkey);
+			       128, rss_key);
 	if (rc) {
 		rss->rss_flags = RSS_ENABLE_NONE;
 		return rc;
 	}
 
-	memcpy(rss->rss_hkey, rss_hkey, RSS_HASH_KEY_LEN);
+	memcpy(rss->rss_hkey, rss_key, RSS_HASH_KEY_LEN);
 
 	/* First time posting */
 	for_all_rx_queues(adapter, rxo, i)
@@ -3123,6 +3124,8 @@ static void be_mac_clear(struct be_adapter *adapter)
 #ifdef CONFIG_BE2NET_VXLAN
 static void be_disable_vxlan_offloads(struct be_adapter *adapter)
 {
+	struct net_device *netdev = adapter->netdev;
+
 	if (adapter->flags & BE_FLAGS_VXLAN_OFFLOADS)
 		be_cmd_manage_iface(adapter, adapter->if_handle,
 				    OP_CONVERT_TUNNEL_TO_NORMAL);
@@ -3132,6 +3135,9 @@ static void be_disable_vxlan_offloads(struct be_adapter *adapter)
 
 	adapter->flags &= ~BE_FLAGS_VXLAN_OFFLOADS;
 	adapter->vxlan_port = 0;
+
+	netdev->hw_enc_features = 0;
+	netdev->hw_features &= ~(NETIF_F_GSO_UDP_TUNNEL);
 }
 #endif
 
@@ -4365,10 +4371,24 @@ static int be_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 
 	return ndo_dflt_bridge_getlink(skb, pid, seq, dev,
 				       hsw_mode == PORT_FWD_TYPE_VEPA ?
-				       BRIDGE_MODE_VEPA : BRIDGE_MODE_VEB);
+				       BRIDGE_MODE_VEPA : BRIDGE_MODE_VEB,
+				       0, 0);
 }
 
 #ifdef CONFIG_BE2NET_VXLAN
+/* VxLAN offload Notes:
+ *
+ * The stack defines tunnel offload flags (hw_enc_features) for IP and doesn't
+ * distinguish various types of transports (VxLAN, GRE, NVGRE ..). So, offload
+ * is expected to work across all types of IP tunnels once exported. Skyhawk
+ * supports offloads for either VxLAN or NVGRE, exclusively. So we export VxLAN
+ * offloads in hw_enc_features only when a VxLAN port is added. Note this only
+ * ensures that other tunnels work fine while VxLAN offloads are not enabled.
+ *
+ * Skyhawk supports VxLAN offloads only for one UDP dport. So, if the stack
+ * adds more than one port, disable offloads and don't re-enable them again
+ * until after all the tunnels are removed.
+ */
 static void be_add_vxlan_port(struct net_device *netdev, sa_family_t sa_family,
 			      __be16 port)
 {
@@ -4380,13 +4400,16 @@ static void be_add_vxlan_port(struct net_device *netdev, sa_family_t sa_family,
 		return;
 
 	if (adapter->flags & BE_FLAGS_VXLAN_OFFLOADS) {
-		dev_warn(dev, "Cannot add UDP port %d for VxLAN offloads\n",
-			 be16_to_cpu(port));
 		dev_info(dev,
 			 "Only one UDP port supported for VxLAN offloads\n");
-		return;
+		dev_info(dev, "Disabling VxLAN offloads\n");
+		adapter->vxlan_port_count++;
+		goto err;
 	}
 
+	if (adapter->vxlan_port_count++ >= 1)
+		return;
+
 	status = be_cmd_manage_iface(adapter, adapter->if_handle,
 				     OP_CONVERT_NORMAL_TO_TUNNEL);
 	if (status) {
@@ -4402,6 +4425,11 @@ static void be_add_vxlan_port(struct net_device *netdev, sa_family_t sa_family,
 	adapter->flags |= BE_FLAGS_VXLAN_OFFLOADS;
 	adapter->vxlan_port = port;
 
+	netdev->hw_enc_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
+				   NETIF_F_TSO | NETIF_F_TSO6 |
+				   NETIF_F_GSO_UDP_TUNNEL;
+	netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL;
+
 	dev_info(dev, "Enabled VxLAN offloads for UDP port %d\n",
 		 be16_to_cpu(port));
 	return;
@@ -4418,13 +4446,15 @@ static void be_del_vxlan_port(struct net_device *netdev, sa_family_t sa_family,
 		return;
 
 	if (adapter->vxlan_port != port)
-		return;
+		goto done;
 
 	be_disable_vxlan_offloads(adapter);
 
 	dev_info(&adapter->pdev->dev,
 		 "Disabled VxLAN offloads for UDP port %d\n",
 		 be16_to_cpu(port));
+done:
+	adapter->vxlan_port_count--;
 }
 
 static bool be_gso_check(struct sk_buff *skb, struct net_device *dev)
@@ -4468,12 +4498,6 @@ static void be_netdev_init(struct net_device *netdev)
 {
 	struct be_adapter *adapter = netdev_priv(netdev);
 
-	if (skyhawk_chip(adapter)) {
-		netdev->hw_enc_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
-					   NETIF_F_TSO | NETIF_F_TSO6 |
-					   NETIF_F_GSO_UDP_TUNNEL;
-		netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL;
-	}
 	netdev->hw_features |= NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6 |
 		NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM |
 		NETIF_F_HW_VLAN_CTAG_TX;