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

Pull networking updates from David Miller:

 1) Significantly shrink the core networking routing structures. Result
    of http://vger.kernel.org/~davem/seoul2017_netdev_keynote.pdf

 2) Add netdevsim driver for testing various offloads, from Jakub
    Kicinski.

 3) Support cross-chip FDB operations in DSA, from Vivien Didelot.

 4) Add a 2nd listener hash table for TCP, similar to what was done for
    UDP. From Martin KaFai Lau.

 5) Add eBPF based queue selection to tun, from Jason Wang.

 6) Lockless qdisc support, from John Fastabend.

 7) SCTP stream interleave support, from Xin Long.

 8) Smoother TCP receive autotuning, from Eric Dumazet.

 9) Lots of erspan tunneling enhancements, from William Tu.

10) Add true function call support to BPF, from Alexei Starovoitov.

11) Add explicit support for GRO HW offloading, from Michael Chan.

12) Support extack generation in more netlink subsystems. From Alexander
    Aring, Quentin Monnet, and Jakub Kicinski.

13) Add 1000BaseX, flow control, and EEE support to mvneta driver. From
    Russell King.

14) Add flow table abstraction to netfilter, from Pablo Neira Ayuso.

15) Many improvements and simplifications to the NFP driver bpf JIT,
    from Jakub Kicinski.

16) Support for ipv6 non-equal cost multipath routing, from Ido
    Schimmel.

17) Add resource abstration to devlink, from Arkadi Sharshevsky.

18) Packet scheduler classifier shared filter block support, from Jiri
    Pirko.

19) Avoid locking in act_csum, from Davide Caratti.

20) devinet_ioctl() simplifications from Al viro.

21) More TCP bpf improvements from Lawrence Brakmo.

22) Add support for onlink ipv6 route flag, similar to ipv4, from David
    Ahern.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1925 commits)
  tls: Add support for encryption using async offload accelerator
  ip6mr: fix stale iterator
  net/sched: kconfig: Remove blank help texts
  openvswitch: meter: Use 64-bit arithmetic instead of 32-bit
  tcp_nv: fix potential integer overflow in tcpnv_acked
  r8169: fix RTL8168EP take too long to complete driver initialization.
  qmi_wwan: Add support for Quectel EP06
  rtnetlink: enable IFLA_IF_NETNSID for RTM_NEWLINK
  ipmr: Fix ptrdiff_t print formatting
  ibmvnic: Wait for device response when changing MAC
  qlcnic: fix deadlock bug
  tcp: release sk_frag.page in tcp_disconnect
  ipv4: Get the address of interface correctly.
  net_sched: gen_estimator: fix lockdep splat
  net: macb: Handle HRESP error
  net/mlx5e: IPoIB, Fix copy-paste bug in flow steering refactoring
  ipv6: addrconf: break critical section in addrconf_verify_rtnl()
  ipv6: change route cache aging logic
  i40e/i40evf: Update DESC_NEEDED value to reflect larger value
  bnxt_en: cleanup DIM work on device shutdown
  ...

1 files changed, 184 insertions, 37 deletions

diff --git a/drivers/net/ethernet/chelsio/cxgb4/sge.c b/drivers/net/ethernet/chelsio/cxgb4/sge.c
index 6c7b0ac0b48b..6e310a0da7c9 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/sge.c
@@ -761,12 +761,19 @@ static inline unsigned int flits_to_desc(unsigned int n)
  *	Returns whether an Ethernet packet is small enough to fit as
  *	immediate data. Return value corresponds to headroom required.
  */
-static inline int is_eth_imm(const struct sk_buff *skb)
+static inline int is_eth_imm(const struct sk_buff *skb, unsigned int chip_ver)
 {
-	int hdrlen = skb_shinfo(skb)->gso_size ?
-			sizeof(struct cpl_tx_pkt_lso_core) : 0;
+	int hdrlen = 0;
 
-	hdrlen += sizeof(struct cpl_tx_pkt);
+	if (skb->encapsulation && skb_shinfo(skb)->gso_size &&
+	    chip_ver > CHELSIO_T5) {
+		hdrlen = sizeof(struct cpl_tx_tnl_lso);
+		hdrlen += sizeof(struct cpl_tx_pkt_core);
+	} else {
+		hdrlen = skb_shinfo(skb)->gso_size ?
+			 sizeof(struct cpl_tx_pkt_lso_core) : 0;
+		hdrlen += sizeof(struct cpl_tx_pkt);
+	}
 	if (skb->len <= MAX_IMM_TX_PKT_LEN - hdrlen)
 		return hdrlen;
 	return 0;
@@ -779,10 +786,11 @@ static inline int is_eth_imm(const struct sk_buff *skb)
  *	Returns the number of flits needed for a Tx WR for the given Ethernet
  *	packet, including the needed WR and CPL headers.
  */
-static inline unsigned int calc_tx_flits(const struct sk_buff *skb)
+static inline unsigned int calc_tx_flits(const struct sk_buff *skb,
+					 unsigned int chip_ver)
 {
 	unsigned int flits;
-	int hdrlen = is_eth_imm(skb);
+	int hdrlen = is_eth_imm(skb, chip_ver);
 
 	/* If the skb is small enough, we can pump it out as a work request
 	 * with only immediate data.  In that case we just have to have the
@@ -801,13 +809,20 @@ static inline unsigned int calc_tx_flits(const struct sk_buff *skb)
 	 * with an embedded TX Packet Write CPL message.
 	 */
 	flits = sgl_len(skb_shinfo(skb)->nr_frags + 1);
-	if (skb_shinfo(skb)->gso_size)
-		flits += (sizeof(struct fw_eth_tx_pkt_wr) +
-			  sizeof(struct cpl_tx_pkt_lso_core) +
-			  sizeof(struct cpl_tx_pkt_core)) / sizeof(__be64);
-	else
+	if (skb_shinfo(skb)->gso_size) {
+		if (skb->encapsulation && chip_ver > CHELSIO_T5)
+			hdrlen = sizeof(struct fw_eth_tx_pkt_wr) +
+				 sizeof(struct cpl_tx_tnl_lso);
+		else
+			hdrlen = sizeof(struct fw_eth_tx_pkt_wr) +
+				 sizeof(struct cpl_tx_pkt_lso_core);
+
+		hdrlen += sizeof(struct cpl_tx_pkt_core);
+		flits += (hdrlen / sizeof(__be64));
+	} else {
 		flits += (sizeof(struct fw_eth_tx_pkt_wr) +
 			  sizeof(struct cpl_tx_pkt_core)) / sizeof(__be64);
+	}
 	return flits;
 }
 
@@ -818,9 +833,10 @@ static inline unsigned int calc_tx_flits(const struct sk_buff *skb)
  *	Returns the number of Tx descriptors needed for the given Ethernet
  *	packet, including the needed WR and CPL headers.
  */
-static inline unsigned int calc_tx_descs(const struct sk_buff *skb)
+static inline unsigned int calc_tx_descs(const struct sk_buff *skb,
+					 unsigned int chip_ver)
 {
-	return flits_to_desc(calc_tx_flits(skb));
+	return flits_to_desc(calc_tx_flits(skb, chip_ver));
 }
 
 /**
@@ -1148,6 +1164,105 @@ cxgb_fcoe_offload(struct sk_buff *skb, struct adapter *adap,
 }
 #endif /* CONFIG_CHELSIO_T4_FCOE */
 
+/* Returns tunnel type if hardware supports offloading of the same.
+ * It is called only for T5 and onwards.
+ */
+enum cpl_tx_tnl_lso_type cxgb_encap_offload_supported(struct sk_buff *skb)
+{
+	u8 l4_hdr = 0;
+	enum cpl_tx_tnl_lso_type tnl_type = TX_TNL_TYPE_OPAQUE;
+	struct port_info *pi = netdev_priv(skb->dev);
+	struct adapter *adapter = pi->adapter;
+
+	if (skb->inner_protocol_type != ENCAP_TYPE_ETHER ||
+	    skb->inner_protocol != htons(ETH_P_TEB))
+		return tnl_type;
+
+	switch (vlan_get_protocol(skb)) {
+	case htons(ETH_P_IP):
+		l4_hdr = ip_hdr(skb)->protocol;
+		break;
+	case htons(ETH_P_IPV6):
+		l4_hdr = ipv6_hdr(skb)->nexthdr;
+		break;
+	default:
+		return tnl_type;
+	}
+
+	switch (l4_hdr) {
+	case IPPROTO_UDP:
+		if (adapter->vxlan_port == udp_hdr(skb)->dest)
+			tnl_type = TX_TNL_TYPE_VXLAN;
+		else if (adapter->geneve_port == udp_hdr(skb)->dest)
+			tnl_type = TX_TNL_TYPE_GENEVE;
+		break;
+	default:
+		return tnl_type;
+	}
+
+	return tnl_type;
+}
+
+static inline void t6_fill_tnl_lso(struct sk_buff *skb,
+				   struct cpl_tx_tnl_lso *tnl_lso,
+				   enum cpl_tx_tnl_lso_type tnl_type)
+{
+	u32 val;
+	int in_eth_xtra_len;
+	int l3hdr_len = skb_network_header_len(skb);
+	int eth_xtra_len = skb_network_offset(skb) - ETH_HLEN;
+	const struct skb_shared_info *ssi = skb_shinfo(skb);
+	bool v6 = (ip_hdr(skb)->version == 6);
+
+	val = CPL_TX_TNL_LSO_OPCODE_V(CPL_TX_TNL_LSO) |
+	      CPL_TX_TNL_LSO_FIRST_F |
+	      CPL_TX_TNL_LSO_LAST_F |
+	      (v6 ? CPL_TX_TNL_LSO_IPV6OUT_F : 0) |
+	      CPL_TX_TNL_LSO_ETHHDRLENOUT_V(eth_xtra_len / 4) |
+	      CPL_TX_TNL_LSO_IPHDRLENOUT_V(l3hdr_len / 4) |
+	      (v6 ? 0 : CPL_TX_TNL_LSO_IPHDRCHKOUT_F) |
+	      CPL_TX_TNL_LSO_IPLENSETOUT_F |
+	      (v6 ? 0 : CPL_TX_TNL_LSO_IPIDINCOUT_F);
+	tnl_lso->op_to_IpIdSplitOut = htonl(val);
+
+	tnl_lso->IpIdOffsetOut = 0;
+
+	/* Get the tunnel header length */
+	val = skb_inner_mac_header(skb) - skb_mac_header(skb);
+	in_eth_xtra_len = skb_inner_network_header(skb) -
+			  skb_inner_mac_header(skb) - ETH_HLEN;
+
+	switch (tnl_type) {
+	case TX_TNL_TYPE_VXLAN:
+	case TX_TNL_TYPE_GENEVE:
+		tnl_lso->UdpLenSetOut_to_TnlHdrLen =
+			htons(CPL_TX_TNL_LSO_UDPCHKCLROUT_F |
+			CPL_TX_TNL_LSO_UDPLENSETOUT_F);
+		break;
+	default:
+		tnl_lso->UdpLenSetOut_to_TnlHdrLen = 0;
+		break;
+	}
+
+	tnl_lso->UdpLenSetOut_to_TnlHdrLen |=
+		 htons(CPL_TX_TNL_LSO_TNLHDRLEN_V(val) |
+		       CPL_TX_TNL_LSO_TNLTYPE_V(tnl_type));
+
+	tnl_lso->r1 = 0;
+
+	val = CPL_TX_TNL_LSO_ETHHDRLEN_V(in_eth_xtra_len / 4) |
+	      CPL_TX_TNL_LSO_IPV6_V(inner_ip_hdr(skb)->version == 6) |
+	      CPL_TX_TNL_LSO_IPHDRLEN_V(skb_inner_network_header_len(skb) / 4) |
+	      CPL_TX_TNL_LSO_TCPHDRLEN_V(inner_tcp_hdrlen(skb) / 4);
+	tnl_lso->Flow_to_TcpHdrLen = htonl(val);
+
+	tnl_lso->IpIdOffset = htons(0);
+
+	tnl_lso->IpIdSplit_to_Mss = htons(CPL_TX_TNL_LSO_MSS_V(ssi->gso_size));
+	tnl_lso->TCPSeqOffset = htonl(0);
+	tnl_lso->EthLenOffset_Size = htonl(CPL_TX_TNL_LSO_SIZE_V(skb->len));
+}
+
 /**
  *	t4_eth_xmit - add a packet to an Ethernet Tx queue
  *	@skb: the packet
@@ -1171,6 +1286,9 @@ netdev_tx_t t4_eth_xmit(struct sk_buff *skb, struct net_device *dev)
 	bool immediate = false;
 	int len, max_pkt_len;
 	bool ptp_enabled = is_ptp_enabled(skb, dev);
+	unsigned int chip_ver;
+	enum cpl_tx_tnl_lso_type tnl_type = TX_TNL_TYPE_OPAQUE;
+
 #ifdef CONFIG_CHELSIO_T4_FCOE
 	int err;
 #endif /* CONFIG_CHELSIO_T4_FCOE */
@@ -1227,7 +1345,8 @@ out_free:	dev_kfree_skb_any(skb);
 	}
 #endif /* CONFIG_CHELSIO_T4_FCOE */
 
-	flits = calc_tx_flits(skb);
+	chip_ver = CHELSIO_CHIP_VERSION(adap->params.chip);
+	flits = calc_tx_flits(skb, chip_ver);
 	ndesc = flits_to_desc(flits);
 	credits = txq_avail(&q->q) - ndesc;
 
@@ -1241,9 +1360,12 @@ out_free:	dev_kfree_skb_any(skb);
 		return NETDEV_TX_BUSY;
 	}
 
-	if (is_eth_imm(skb))
+	if (is_eth_imm(skb, chip_ver))
 		immediate = true;
 
+	if (skb->encapsulation && chip_ver > CHELSIO_T5)
+		tnl_type = cxgb_encap_offload_supported(skb);
+
 	if (!immediate &&
 	    unlikely(cxgb4_map_skb(adap->pdev_dev, skb, addr) < 0)) {
 		q->mapping_err++;
@@ -1269,33 +1391,58 @@ out_free:	dev_kfree_skb_any(skb);
 		bool v6 = (ssi->gso_type & SKB_GSO_TCPV6) != 0;
 		int l3hdr_len = skb_network_header_len(skb);
 		int eth_xtra_len = skb_network_offset(skb) - ETH_HLEN;
+		struct cpl_tx_tnl_lso *tnl_lso = (void *)(wr + 1);
+
+		if (tnl_type)
+			len += sizeof(*tnl_lso);
+		else
+			len += sizeof(*lso);
 
-		len += sizeof(*lso);
 		wr->op_immdlen = htonl(FW_WR_OP_V(FW_ETH_TX_PKT_WR) |
 				       FW_WR_IMMDLEN_V(len));
-		lso->c.lso_ctrl = htonl(LSO_OPCODE_V(CPL_TX_PKT_LSO) |
-					LSO_FIRST_SLICE_F | LSO_LAST_SLICE_F |
-					LSO_IPV6_V(v6) |
-					LSO_ETHHDR_LEN_V(eth_xtra_len / 4) |
-					LSO_IPHDR_LEN_V(l3hdr_len / 4) |
-					LSO_TCPHDR_LEN_V(tcp_hdr(skb)->doff));
-		lso->c.ipid_ofst = htons(0);
-		lso->c.mss = htons(ssi->gso_size);
-		lso->c.seqno_offset = htonl(0);
-		if (is_t4(adap->params.chip))
-			lso->c.len = htonl(skb->len);
-		else
-			lso->c.len = htonl(LSO_T5_XFER_SIZE_V(skb->len));
-		cpl = (void *)(lso + 1);
+		if (tnl_type) {
+			struct iphdr *iph = ip_hdr(skb);
 
-		if (CHELSIO_CHIP_VERSION(adap->params.chip) <= CHELSIO_T5)
-			cntrl =	TXPKT_ETHHDR_LEN_V(eth_xtra_len);
-		else
-			cntrl = T6_TXPKT_ETHHDR_LEN_V(eth_xtra_len);
+			t6_fill_tnl_lso(skb, tnl_lso, tnl_type);
+			cpl = (void *)(tnl_lso + 1);
+			/* Driver is expected to compute partial checksum that
+			 * does not include the IP Total Length.
+			 */
+			if (iph->version == 4) {
+				iph->check = 0;
+				iph->tot_len = 0;
+				iph->check = (u16)(~ip_fast_csum((u8 *)iph,
+								 iph->ihl));
+			}
+			if (skb->ip_summed == CHECKSUM_PARTIAL)
+				cntrl = hwcsum(adap->params.chip, skb);
+		} else {
+			lso->c.lso_ctrl = htonl(LSO_OPCODE_V(CPL_TX_PKT_LSO) |
+					  LSO_FIRST_SLICE_F | LSO_LAST_SLICE_F |
+					  LSO_IPV6_V(v6) |
+					  LSO_ETHHDR_LEN_V(eth_xtra_len / 4) |
+					  LSO_IPHDR_LEN_V(l3hdr_len / 4) |
+					  LSO_TCPHDR_LEN_V(tcp_hdr(skb)->doff));
+			lso->c.ipid_ofst = htons(0);
+			lso->c.mss = htons(ssi->gso_size);
+			lso->c.seqno_offset = htonl(0);
+			if (is_t4(adap->params.chip))
+				lso->c.len = htonl(skb->len);
+			else
+				lso->c.len =
+					htonl(LSO_T5_XFER_SIZE_V(skb->len));
+			cpl = (void *)(lso + 1);
 
-		cntrl |= TXPKT_CSUM_TYPE_V(v6 ?
-					   TX_CSUM_TCPIP6 : TX_CSUM_TCPIP) |
-			 TXPKT_IPHDR_LEN_V(l3hdr_len);
+			if (CHELSIO_CHIP_VERSION(adap->params.chip)
+			    <= CHELSIO_T5)
+				cntrl =	TXPKT_ETHHDR_LEN_V(eth_xtra_len);
+			else
+				cntrl = T6_TXPKT_ETHHDR_LEN_V(eth_xtra_len);
+
+			cntrl |= TXPKT_CSUM_TYPE_V(v6 ?
+				 TX_CSUM_TCPIP6 : TX_CSUM_TCPIP) |
+				 TXPKT_IPHDR_LEN_V(l3hdr_len);
+		}
 		q->tso++;
 		q->tx_cso += ssi->gso_segs;
 	} else {