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

Pull networking updates from David Miller:
 "Another merge window, another set of networking changes.  I've heard
  rumblings that the lightweight tunnels infrastructure has been voted
  networking change of the year.  But what do I know?

   1) Add conntrack support to openvswitch, from Joe Stringer.

   2) Initial support for VRF (Virtual Routing and Forwarding), which
      allows the segmentation of routing paths without using multiple
      devices.  There are some semantic kinks to work out still, but
      this is a reasonably strong foundation.  From David Ahern.

   3) Remove spinlock fro act_bpf fast path, from Alexei Starovoitov.

   4) Ignore route nexthops with a link down state in ipv6, just like
      ipv4.  From Andy Gospodarek.

   5) Remove spinlock from fast path of act_gact and act_mirred, from
      Eric Dumazet.

   6) Document the DSA layer, from Florian Fainelli.

   7) Add netconsole support to bcmgenet, systemport, and DSA.  Also
      from Florian Fainelli.

   8) Add Mellanox Switch Driver and core infrastructure, from Jiri
      Pirko.

   9) Add support for "light weight tunnels", which allow for
      encapsulation and decapsulation without bearing the overhead of a
      full blown netdevice.  From Thomas Graf, Jiri Benc, and a cast of
      others.

  10) Add Identifier Locator Addressing support for ipv6, from Tom
      Herbert.

  11) Support fragmented SKBs in iwlwifi, from Johannes Berg.

  12) Allow perf PMUs to be accessed from eBPF programs, from Kaixu Xia.

  13) Add BQL support to 3c59x driver, from Loganaden Velvindron.

  14) Stop using a zero TX queue length to mean that a device shouldn't
      have a qdisc attached, use an explicit flag instead.  From Phil
      Sutter.

  15) Use generic geneve netdevice infrastructure in openvswitch, from
      Pravin B Shelar.

  16) Add infrastructure to avoid re-forwarding a packet in software
      that was already forwarded by a hardware switch.  From Scott
      Feldman.

  17) Allow AF_PACKET fanout function to be implemented in a bpf
      program, from Willem de Bruijn"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1458 commits)
  netfilter: nf_conntrack: make nf_ct_zone_dflt built-in
  netfilter: nf_dup{4, 6}: fix build error when nf_conntrack disabled
  net: fec: clear receive interrupts before processing a packet
  ipv6: fix exthdrs offload registration in out_rt path
  xen-netback: add support for multicast control
  bgmac: Update fixed_phy_register()
  sock, diag: fix panic in sock_diag_put_filterinfo
  flow_dissector: Use 'const' where possible.
  flow_dissector: Fix function argument ordering dependency
  ixgbe: Resolve "initialized field overwritten" warnings
  ixgbe: Remove bimodal SR-IOV disabling
  ixgbe: Add support for reporting 2.5G link speed
  ixgbe: fix bounds checking in ixgbe_setup_tc for 82598
  ixgbe: support for ethtool set_rxfh
  ixgbe: Avoid needless PHY access on copper phys
  ixgbe: cleanup to use cached mask value
  ixgbe: Remove second instance of lan_id variable
  ixgbe: use kzalloc for allocating one thing
  flow: Move __get_hash_from_flowi{4,6} into flow_dissector.c
  ixgbe: Remove unused PCI bus types
  ...

5 files changed, 285 insertions, 65 deletions

diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h
index 541bed0..ff05bbc 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h
@@ -193,12 +193,16 @@ enum xgene_enet_rm {
 #define USERINFO_LEN			32
 #define FPQNUM_POS			32
 #define FPQNUM_LEN			12
+#define NV_POS				50
+#define NV_LEN				1
+#define LL_POS				51
+#define LL_LEN				1
 #define LERR_POS			60
 #define LERR_LEN			3
 #define STASH_POS			52
 #define STASH_LEN			2
 #define BUFDATALEN_POS			48
-#define BUFDATALEN_LEN			12
+#define BUFDATALEN_LEN			15
 #define DATAADDR_POS			0
 #define DATAADDR_LEN			42
 #define COHERENT_POS			63
@@ -215,9 +219,19 @@ enum xgene_enet_rm {
 #define IPHDR_LEN			6
 #define EC_POS				22	/* Enable checksum */
 #define EC_LEN				1
+#define ET_POS				23	/* Enable TSO */
 #define IS_POS				24	/* IP protocol select */
 #define IS_LEN				1
 #define TYPE_ETH_WORK_MESSAGE_POS	44
+#define LL_BYTES_MSB_POS		56
+#define LL_BYTES_MSB_LEN		8
+#define LL_BYTES_LSB_POS		48
+#define LL_BYTES_LSB_LEN		12
+#define LL_LEN_POS			48
+#define LL_LEN_LEN			8
+#define DATALEN_MASK			GENMASK(11, 0)
+
+#define LAST_BUFFER			(0x7800ULL << BUFDATALEN_POS)
 
 struct xgene_enet_raw_desc {
 	__le64 m0;
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
index a02ea7f8..e47298f 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
@@ -147,18 +147,27 @@ static int xgene_enet_tx_completion(struct xgene_enet_desc_ring *cp_ring,
 {
 	struct sk_buff *skb;
 	struct device *dev;
+	skb_frag_t *frag;
+	dma_addr_t *frag_dma_addr;
 	u16 skb_index;
 	u8 status;
-	int ret = 0;
+	int i, ret = 0;
 
 	skb_index = GET_VAL(USERINFO, le64_to_cpu(raw_desc->m0));
 	skb = cp_ring->cp_skb[skb_index];
+	frag_dma_addr = &cp_ring->frag_dma_addr[skb_index * MAX_SKB_FRAGS];
 
 	dev = ndev_to_dev(cp_ring->ndev);
 	dma_unmap_single(dev, GET_VAL(DATAADDR, le64_to_cpu(raw_desc->m1)),
-			 GET_VAL(BUFDATALEN, le64_to_cpu(raw_desc->m1)),
+			 skb_headlen(skb),
 			 DMA_TO_DEVICE);
 
+	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+		frag = &skb_shinfo(skb)->frags[i];
+		dma_unmap_page(dev, frag_dma_addr[i], skb_frag_size(frag),
+			       DMA_TO_DEVICE);
+	}
+
 	/* Checking for error */
 	status = GET_VAL(LERR, le64_to_cpu(raw_desc->m0));
 	if (unlikely(status > 2)) {
@@ -179,12 +188,16 @@ static int xgene_enet_tx_completion(struct xgene_enet_desc_ring *cp_ring,
 
 static u64 xgene_enet_work_msg(struct sk_buff *skb)
 {
+	struct net_device *ndev = skb->dev;
+	struct xgene_enet_pdata *pdata = netdev_priv(ndev);
 	struct iphdr *iph;
-	u8 l3hlen, l4hlen = 0;
-	u8 csum_enable = 0;
-	u8 proto = 0;
-	u8 ethhdr;
-	u64 hopinfo;
+	u8 l3hlen = 0, l4hlen = 0;
+	u8 ethhdr, proto = 0, csum_enable = 0;
+	u64 hopinfo = 0;
+	u32 hdr_len, mss = 0;
+	u32 i, len, nr_frags;
+
+	ethhdr = xgene_enet_hdr_len(skb->data);
 
 	if (unlikely(skb->protocol != htons(ETH_P_IP)) &&
 	    unlikely(skb->protocol != htons(ETH_P_8021Q)))
@@ -201,14 +214,40 @@ static u64 xgene_enet_work_msg(struct sk_buff *skb)
 		l4hlen = tcp_hdrlen(skb) >> 2;
 		csum_enable = 1;
 		proto = TSO_IPPROTO_TCP;
+		if (ndev->features & NETIF_F_TSO) {
+			hdr_len = ethhdr + ip_hdrlen(skb) + tcp_hdrlen(skb);
+			mss = skb_shinfo(skb)->gso_size;
+
+			if (skb_is_nonlinear(skb)) {
+				len = skb_headlen(skb);
+				nr_frags = skb_shinfo(skb)->nr_frags;
+
+				for (i = 0; i < 2 && i < nr_frags; i++)
+					len += skb_shinfo(skb)->frags[i].size;
+
+				/* HW requires header must reside in 3 buffer */
+				if (unlikely(hdr_len > len)) {
+					if (skb_linearize(skb))
+						return 0;
+				}
+			}
+
+			if (!mss || ((skb->len - hdr_len) <= mss))
+				goto out;
+
+			if (mss != pdata->mss) {
+				pdata->mss = mss;
+				pdata->mac_ops->set_mss(pdata);
+			}
+			hopinfo |= SET_BIT(ET);
+		}
 	} else if (iph->protocol == IPPROTO_UDP) {
 		l4hlen = UDP_HDR_SIZE;
 		csum_enable = 1;
 	}
 out:
 	l3hlen = ip_hdrlen(skb) >> 2;
-	ethhdr = xgene_enet_hdr_len(skb->data);
-	hopinfo = SET_VAL(TCPHDR, l4hlen) |
+	hopinfo |= SET_VAL(TCPHDR, l4hlen) |
 		  SET_VAL(IPHDR, l3hlen) |
 		  SET_VAL(ETHHDR, ethhdr) |
 		  SET_VAL(EC, csum_enable) |
@@ -219,35 +258,170 @@ out:
 	return hopinfo;
 }
 
+static u16 xgene_enet_encode_len(u16 len)
+{
+	return (len == BUFLEN_16K) ? 0 : len;
+}
+
+static void xgene_set_addr_len(__le64 *desc, u32 idx, dma_addr_t addr, u32 len)
+{
+	desc[idx ^ 1] = cpu_to_le64(SET_VAL(DATAADDR, addr) |
+				    SET_VAL(BUFDATALEN, len));
+}
+
+static __le64 *xgene_enet_get_exp_bufs(struct xgene_enet_desc_ring *ring)
+{
+	__le64 *exp_bufs;
+
+	exp_bufs = &ring->exp_bufs[ring->exp_buf_tail * MAX_EXP_BUFFS];
+	memset(exp_bufs, 0, sizeof(__le64) * MAX_EXP_BUFFS);
+	ring->exp_buf_tail = (ring->exp_buf_tail + 1) & ((ring->slots / 2) - 1);
+
+	return exp_bufs;
+}
+
+static dma_addr_t *xgene_get_frag_dma_array(struct xgene_enet_desc_ring *ring)
+{
+	return &ring->cp_ring->frag_dma_addr[ring->tail * MAX_SKB_FRAGS];
+}
+
 static int xgene_enet_setup_tx_desc(struct xgene_enet_desc_ring *tx_ring,
 				    struct sk_buff *skb)
 {
 	struct device *dev = ndev_to_dev(tx_ring->ndev);
 	struct xgene_enet_raw_desc *raw_desc;
-	dma_addr_t dma_addr;
+	__le64 *exp_desc = NULL, *exp_bufs = NULL;
+	dma_addr_t dma_addr, pbuf_addr, *frag_dma_addr;
+	skb_frag_t *frag;
 	u16 tail = tx_ring->tail;
 	u64 hopinfo;
+	u32 len, hw_len;
+	u8 ll = 0, nv = 0, idx = 0;
+	bool split = false;
+	u32 size, offset, ell_bytes = 0;
+	u32 i, fidx, nr_frags, count = 1;
 
 	raw_desc = &tx_ring->raw_desc[tail];
+	tail = (tail + 1) & (tx_ring->slots - 1);
 	memset(raw_desc, 0, sizeof(struct xgene_enet_raw_desc));
 
-	dma_addr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE);
+	hopinfo = xgene_enet_work_msg(skb);
+	if (!hopinfo)
+		return -EINVAL;
+	raw_desc->m3 = cpu_to_le64(SET_VAL(HENQNUM, tx_ring->dst_ring_num) |
+				   hopinfo);
+
+	len = skb_headlen(skb);
+	hw_len = xgene_enet_encode_len(len);
+
+	dma_addr = dma_map_single(dev, skb->data, len, DMA_TO_DEVICE);
 	if (dma_mapping_error(dev, dma_addr)) {
 		netdev_err(tx_ring->ndev, "DMA mapping error\n");
 		return -EINVAL;
 	}
 
 	/* Hardware expects descriptor in little endian format */
-	raw_desc->m0 = cpu_to_le64(tail);
 	raw_desc->m1 = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) |
-				   SET_VAL(BUFDATALEN, skb->len) |
+				   SET_VAL(BUFDATALEN, hw_len) |
 				   SET_BIT(COHERENT));
-	hopinfo = xgene_enet_work_msg(skb);
-	raw_desc->m3 = cpu_to_le64(SET_VAL(HENQNUM, tx_ring->dst_ring_num) |
-				   hopinfo);
-	tx_ring->cp_ring->cp_skb[tail] = skb;
 
-	return 0;
+	if (!skb_is_nonlinear(skb))
+		goto out;
+
+	/* scatter gather */
+	nv = 1;
+	exp_desc = (void *)&tx_ring->raw_desc[tail];
+	tail = (tail + 1) & (tx_ring->slots - 1);
+	memset(exp_desc, 0, sizeof(struct xgene_enet_raw_desc));
+
+	nr_frags = skb_shinfo(skb)->nr_frags;
+	for (i = nr_frags; i < 4 ; i++)
+		exp_desc[i ^ 1] = cpu_to_le64(LAST_BUFFER);
+
+	frag_dma_addr = xgene_get_frag_dma_array(tx_ring);
+
+	for (i = 0, fidx = 0; split || (fidx < nr_frags); i++) {
+		if (!split) {
+			frag = &skb_shinfo(skb)->frags[fidx];
+			size = skb_frag_size(frag);
+			offset = 0;
+
+			pbuf_addr = skb_frag_dma_map(dev, frag, 0, size,
+						     DMA_TO_DEVICE);
+			if (dma_mapping_error(dev, pbuf_addr))
+				return -EINVAL;
+
+			frag_dma_addr[fidx] = pbuf_addr;
+			fidx++;
+
+			if (size > BUFLEN_16K)
+				split = true;
+		}
+
+		if (size > BUFLEN_16K) {
+			len = BUFLEN_16K;
+			size -= BUFLEN_16K;
+		} else {
+			len = size;
+			split = false;
+		}
+
+		dma_addr = pbuf_addr + offset;
+		hw_len = xgene_enet_encode_len(len);
+
+		switch (i) {
+		case 0:
+		case 1:
+		case 2:
+			xgene_set_addr_len(exp_desc, i, dma_addr, hw_len);
+			break;
+		case 3:
+			if (split || (fidx != nr_frags)) {
+				exp_bufs = xgene_enet_get_exp_bufs(tx_ring);
+				xgene_set_addr_len(exp_bufs, idx, dma_addr,
+						   hw_len);
+				idx++;
+				ell_bytes += len;
+			} else {
+				xgene_set_addr_len(exp_desc, i, dma_addr,
+						   hw_len);
+			}
+			break;
+		default:
+			xgene_set_addr_len(exp_bufs, idx, dma_addr, hw_len);
+			idx++;
+			ell_bytes += len;
+			break;
+		}
+
+		if (split)
+			offset += BUFLEN_16K;
+	}
+	count++;
+
+	if (idx) {
+		ll = 1;
+		dma_addr = dma_map_single(dev, exp_bufs,
+					  sizeof(u64) * MAX_EXP_BUFFS,
+					  DMA_TO_DEVICE);
+		if (dma_mapping_error(dev, dma_addr)) {
+			dev_kfree_skb_any(skb);
+			return -EINVAL;
+		}
+		i = ell_bytes >> LL_BYTES_LSB_LEN;
+		exp_desc[2] = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) |
+					  SET_VAL(LL_BYTES_MSB, i) |
+					  SET_VAL(LL_LEN, idx));
+		raw_desc->m2 = cpu_to_le64(SET_VAL(LL_BYTES_LSB, ell_bytes));
+	}
+
+out:
+	raw_desc->m0 = cpu_to_le64(SET_VAL(LL, ll) | SET_VAL(NV, nv) |
+				   SET_VAL(USERINFO, tx_ring->tail));
+	tx_ring->cp_ring->cp_skb[tx_ring->tail] = skb;
+	tx_ring->tail = tail;
+
+	return count;
 }
 
 static netdev_tx_t xgene_enet_start_xmit(struct sk_buff *skb,
@@ -257,6 +431,7 @@ static netdev_tx_t xgene_enet_start_xmit(struct sk_buff *skb,
 	struct xgene_enet_desc_ring *tx_ring = pdata->tx_ring;
 	struct xgene_enet_desc_ring *cp_ring = tx_ring->cp_ring;
 	u32 tx_level, cq_level;
+	int count;
 
 	tx_level = pdata->ring_ops->len(tx_ring);
 	cq_level = pdata->ring_ops->len(cp_ring);
@@ -266,14 +441,17 @@ static netdev_tx_t xgene_enet_start_xmit(struct sk_buff *skb,
 		return NETDEV_TX_BUSY;
 	}
 
-	if (xgene_enet_setup_tx_desc(tx_ring, skb)) {
+	if (skb_padto(skb, XGENE_MIN_ENET_FRAME_SIZE))
+		return NETDEV_TX_OK;
+
+	count = xgene_enet_setup_tx_desc(tx_ring, skb);
+	if (count <= 0) {
 		dev_kfree_skb_any(skb);
 		return NETDEV_TX_OK;
 	}
 
-	pdata->ring_ops->wr_cmd(tx_ring, 1);
+	pdata->ring_ops->wr_cmd(tx_ring, count);
 	skb_tx_timestamp(skb);
-	tx_ring->tail = (tx_ring->tail + 1) & (tx_ring->slots - 1);
 
 	pdata->stats.tx_packets++;
 	pdata->stats.tx_bytes += skb->len;
@@ -326,7 +504,7 @@ static int xgene_enet_rx_frame(struct xgene_enet_desc_ring *rx_ring,
 
 	/* strip off CRC as HW isn't doing this */
 	datalen = GET_VAL(BUFDATALEN, le64_to_cpu(raw_desc->m1));
-	datalen -= 4;
+	datalen = (datalen & DATALEN_MASK) - 4;
 	prefetch(skb->data - NET_IP_ALIGN);
 	skb_put(skb, datalen);
 
@@ -358,26 +536,41 @@ static int xgene_enet_process_ring(struct xgene_enet_desc_ring *ring,
 				   int budget)
 {
 	struct xgene_enet_pdata *pdata = netdev_priv(ring->ndev);
-	struct xgene_enet_raw_desc *raw_desc;
+	struct xgene_enet_raw_desc *raw_desc, *exp_desc;
 	u16 head = ring->head;
 	u16 slots = ring->slots - 1;
-	int ret, count = 0;
+	int ret, count = 0, processed = 0;
 
 	do {
 		raw_desc = &ring->raw_desc[head];
+		exp_desc = NULL;
 		if (unlikely(xgene_enet_is_desc_slot_empty(raw_desc)))
 			break;
 
 		/* read fpqnum field after dataaddr field */
 		dma_rmb();
+		if (GET_BIT(NV, le64_to_cpu(raw_desc->m0))) {
+			head = (head + 1) & slots;
+			exp_desc = &ring->raw_desc[head];
+
+			if (unlikely(xgene_enet_is_desc_slot_empty(exp_desc))) {
+				head = (head - 1) & slots;
+				break;
+			}
+			dma_rmb();
+			count++;
+		}
 		if (is_rx_desc(raw_desc))
 			ret = xgene_enet_rx_frame(ring, raw_desc);
 		else
 			ret = xgene_enet_tx_completion(ring, raw_desc);
 		xgene_enet_mark_desc_slot_empty(raw_desc);
+		if (exp_desc)
+			xgene_enet_mark_desc_slot_empty(exp_desc);
 
 		head = (head + 1) & slots;
 		count++;
+		processed++;
 
 		if (ret)
 			break;
@@ -393,7 +586,7 @@ static int xgene_enet_process_ring(struct xgene_enet_desc_ring *ring,
 		}
 	}
 
-	return count;
+	return processed;
 }
 
 static int xgene_enet_napi(struct napi_struct *napi, const int budget)
@@ -738,12 +931,13 @@ static int xgene_enet_create_desc_rings(struct net_device *ndev)
 	struct xgene_enet_desc_ring *rx_ring, *tx_ring, *cp_ring;
 	struct xgene_enet_desc_ring *buf_pool = NULL;
 	enum xgene_ring_owner owner;
+	dma_addr_t dma_exp_bufs;
 	u8 cpu_bufnum = pdata->cpu_bufnum;
 	u8 eth_bufnum = pdata->eth_bufnum;
 	u8 bp_bufnum = pdata->bp_bufnum;
 	u16 ring_num = pdata->ring_num;
 	u16 ring_id;
-	int ret;
+	int ret, size;
 
 	/* allocate rx descriptor ring */
 	owner = xgene_derive_ring_owner(pdata);
@@ -794,6 +988,15 @@ static int xgene_enet_create_desc_rings(struct net_device *ndev)
 		ret = -ENOMEM;
 		goto err;
 	}
+
+	size = (tx_ring->slots / 2) * sizeof(__le64) * MAX_EXP_BUFFS;
+	tx_ring->exp_bufs = dma_zalloc_coherent(dev, size, &dma_exp_bufs,
+						GFP_KERNEL);
+	if (!tx_ring->exp_bufs) {
+		ret = -ENOMEM;
+		goto err;
+	}
+
 	pdata->tx_ring = tx_ring;
 
 	if (!pdata->cq_cnt) {
@@ -818,6 +1021,16 @@ static int xgene_enet_create_desc_rings(struct net_device *ndev)
 		ret = -ENOMEM;
 		goto err;
 	}
+
+	size = sizeof(dma_addr_t) * MAX_SKB_FRAGS;
+	cp_ring->frag_dma_addr = devm_kcalloc(dev, tx_ring->slots,
+					      size, GFP_KERNEL);
+	if (!cp_ring->frag_dma_addr) {
+		devm_kfree(dev, cp_ring->cp_skb);
+		ret = -ENOMEM;
+		goto err;
+	}
+
 	pdata->tx_ring->cp_ring = cp_ring;
 	pdata->tx_ring->dst_ring_num = xgene_enet_dst_ring_num(cp_ring);
 
@@ -905,40 +1118,6 @@ static int xgene_get_port_id_dt(struct device *dev, struct xgene_enet_pdata *pda
 	return ret;
 }
 
-static int xgene_get_mac_address(struct device *dev,
-				 unsigned char *addr)
-{
-	int ret;
-
-	ret = device_property_read_u8_array(dev, "local-mac-address", addr, 6);
-	if (ret)
-		ret = device_property_read_u8_array(dev, "mac-address",
-						    addr, 6);
-	if (ret)
-		return -ENODEV;
-
-	return ETH_ALEN;
-}
-
-static int xgene_get_phy_mode(struct device *dev)
-{
-	int i, ret;
-	char *modestr;
-
-	ret = device_property_read_string(dev, "phy-connection-type",
-					  (const char **)&modestr);
-	if (ret)
-		ret = device_property_read_string(dev, "phy-mode",
-						  (const char **)&modestr);
-	if (ret)
-		return -ENODEV;
-
-	for (i = 0; i < PHY_INTERFACE_MODE_MAX; i++) {
-		if (!strcasecmp(modestr, phy_modes(i)))
-			return i;
-	}
-	return -ENODEV;
-}
 
 static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata)
 {
@@ -998,12 +1177,12 @@ static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata)
 	if (ret)
 		return ret;
 
-	if (xgene_get_mac_address(dev, ndev->dev_addr) != ETH_ALEN)
+	if (!device_get_mac_address(dev, ndev->dev_addr, ETH_ALEN))
 		eth_hw_addr_random(ndev);
 
 	memcpy(ndev->perm_addr, ndev->dev_addr, ndev->addr_len);
 
-	pdata->phy_mode = xgene_get_phy_mode(dev);
+	pdata->phy_mode = device_get_phy_mode(dev);
 	if (pdata->phy_mode < 0) {
 		dev_err(dev, "Unable to get phy-connection-type\n");
 		return pdata->phy_mode;
@@ -1207,7 +1386,8 @@ static int xgene_enet_probe(struct platform_device *pdev)
 	xgene_enet_set_ethtool_ops(ndev);
 	ndev->features |= NETIF_F_IP_CSUM |
 			  NETIF_F_GSO |
-			  NETIF_F_GRO;
+			  NETIF_F_GRO |
+			  NETIF_F_SG;
 
 	of_id = of_match_device(xgene_enet_of_match, &pdev->dev);
 	if (of_id) {
@@ -1233,6 +1413,12 @@ static int xgene_enet_probe(struct platform_device *pdev)
 
 	xgene_enet_setup_ops(pdata);
 
+	if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) {
+		ndev->features |= NETIF_F_TSO;
+		pdata->mss = XGENE_ENET_MSS;
+	}
+	ndev->hw_features = ndev->features;
+
 	ret = register_netdev(ndev);
 	if (ret) {
 		netdev_err(ndev, "Failed to register netdev\n");
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.h b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h
index 1c85fc8..50f92c3 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.h
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h
@@ -40,8 +40,12 @@
 #define XGENE_DRV_VERSION	"v1.0"
 #define XGENE_ENET_MAX_MTU	1536
 #define SKB_BUFFER_SIZE		(XGENE_ENET_MAX_MTU - NET_IP_ALIGN)
+#define BUFLEN_16K	(16 * 1024)
 #define NUM_PKT_BUF	64
 #define NUM_BUFPOOL	32
+#define MAX_EXP_BUFFS	256
+#define XGENE_ENET_MSS	1448
+#define XGENE_MIN_ENET_FRAME_SIZE	60
 
 #define START_CPU_BUFNUM_0	0
 #define START_ETH_BUFNUM_0	2
@@ -79,6 +83,7 @@ struct xgene_enet_desc_ring {
 	u16 num;
 	u16 head;
 	u16 tail;
+	u16 exp_buf_tail;
 	u16 slots;
 	u16 irq;
 	char irq_name[IRQ_ID_SIZE];
@@ -93,6 +98,7 @@ struct xgene_enet_desc_ring {
 	u8 nbufpool;
 	struct sk_buff *(*rx_skb);
 	struct sk_buff *(*cp_skb);
+	dma_addr_t *frag_dma_addr;
 	enum xgene_enet_ring_cfgsize cfgsize;
 	struct xgene_enet_desc_ring *cp_ring;
 	struct xgene_enet_desc_ring *buf_pool;
@@ -102,6 +108,7 @@ struct xgene_enet_desc_ring {
 		struct xgene_enet_raw_desc *raw_desc;
 		struct xgene_enet_raw_desc16 *raw_desc16;
 	};
+	__le64 *exp_bufs;
 };
 
 struct xgene_mac_ops {
@@ -112,6 +119,7 @@ struct xgene_mac_ops {
 	void (*tx_disable)(struct xgene_enet_pdata *pdata);
 	void (*rx_disable)(struct xgene_enet_pdata *pdata);
 	void (*set_mac_addr)(struct xgene_enet_pdata *pdata);
+	void (*set_mss)(struct xgene_enet_pdata *pdata);
 	void (*link_state)(struct work_struct *work);
 };
 
@@ -170,6 +178,7 @@ struct xgene_enet_pdata {
 	u8 eth_bufnum;
 	u8 bp_bufnum;
 	u16 ring_num;
+	u32 mss;
 };
 
 struct xgene_indirect_ctl {
@@ -204,6 +213,9 @@ static inline u64 xgene_enet_get_field_value(int pos, int len, u64 src)
 #define GET_VAL(field, src) \
 		xgene_enet_get_field_value(field ## _POS, field ## _LEN, src)
 
+#define GET_BIT(field, src) \
+		xgene_enet_get_field_value(field ## _POS, 1, src)
+
 static inline struct device *ndev_to_dev(struct net_device *ndev)
 {
 	return ndev->dev.parent;
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
index 05edb84..7a28a48 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
@@ -184,6 +184,11 @@ static void xgene_xgmac_set_mac_addr(struct xgene_enet_pdata *pdata)
 	xgene_enet_wr_mac(pdata, HSTMACADR_MSW_ADDR, addr1);
 }
 
+static void xgene_xgmac_set_mss(struct xgene_enet_pdata *pdata)
+{
+	xgene_enet_wr_csr(pdata, XG_TSIF_MSS_REG0_ADDR, pdata->mss);
+}
+
 static u32 xgene_enet_link_status(struct xgene_enet_pdata *pdata)
 {
 	u32 data;
@@ -204,8 +209,8 @@ static void xgene_xgmac_init(struct xgene_enet_pdata *pdata)
 	data &= ~HSTLENCHK;
 	xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data);
 
-	xgene_enet_wr_mac(pdata, HSTMAXFRAME_LENGTH_ADDR, 0x06000600);
 	xgene_xgmac_set_mac_addr(pdata);
+	xgene_xgmac_set_mss(pdata);
 
 	xgene_enet_rd_csr(pdata, XG_RSIF_CONFIG_REG_ADDR, &data);
 	data |= CFG_RSIF_FPBUFF_TIMEOUT_EN;
@@ -329,6 +334,7 @@ struct xgene_mac_ops xgene_xgmac_ops = {
 	.rx_disable = xgene_xgmac_rx_disable,
 	.tx_disable = xgene_xgmac_tx_disable,
 	.set_mac_addr = xgene_xgmac_set_mac_addr,
+	.set_mss = xgene_xgmac_set_mss,
 	.link_state = xgene_enet_link_state
 };
 
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.h b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.h
index bf0a994..f8f908d 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.h
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.h
@@ -62,7 +62,9 @@
 #define XCLE_BYPASS_REG0_ADDR           0x0160
 #define XCLE_BYPASS_REG1_ADDR           0x0164
 #define XG_CFG_BYPASS_ADDR		0x0204
+#define XG_CFG_LINK_AGGR_RESUME_0_ADDR	0x0214
 #define XG_LINK_STATUS_ADDR		0x0228
+#define XG_TSIF_MSS_REG0_ADDR		0x02a4
 #define XG_ENET_SPARE_CFG_REG_ADDR	0x040c
 #define XG_ENET_SPARE_CFG_REG_1_ADDR	0x0410
 #define XGENET_RX_DV_GATE_REG_0_ADDR	0x0804