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

Pull networking updates from David Miller:

 1) Add TX fast path in mac80211, from Johannes Berg.

 2) Add TSO/GRO support to ibmveth, from Thomas Falcon

 3) Move away from cached routes in ipv6, just like ipv4, from Martin
    KaFai Lau.

 4) Lots of new rhashtable tests, from Thomas Graf.

 5) Run ingress qdisc lockless, from Alexei Starovoitov.

 6) Allow servers to fetch TCP packet headers for SYN packets of new
    connections, for fingerprinting.  From Eric Dumazet.

 7) Add mode parameter to pktgen, for testing receive.  From Alexei
    Starovoitov.

 8) Cache access optimizations via simplifications of build_skb(), from
    Alexander Duyck.

 9) Move page frag allocator under mm/, also from Alexander.

10) Add xmit_more support to hv_netvsc, from KY Srinivasan.

11) Add a counter guard in case we try to perform endless reclassify
    loops in the packet scheduler.

12) Extern flow dissector to be programmable and use it in new "Flower"
    classifier.  From Jiri Pirko.

13) AF_PACKET fanout rollover fixes, performance improvements, and new
    statistics.  From Willem de Bruijn.

14) Add netdev driver for GENEVE tunnels, from John W Linville.

15) Add ingress netfilter hooks and filtering, from Pablo Neira Ayuso.

16) Fix handling of epoll edge triggers in TCP, from Eric Dumazet.

17) Add an ECN retry fallback for the initial TCP handshake, from Daniel
    Borkmann.

18) Add tail call support to BPF, from Alexei Starovoitov.

19) Add several pktgen helper scripts, from Jesper Dangaard Brouer.

20) Add zerocopy support to AF_UNIX, from Hannes Frederic Sowa.

21) Favor even port numbers for allocation to connect() requests, and
    odd port numbers for bind(0), in an effort to help avoid
    ip_local_port_range exhaustion.  From Eric Dumazet.

22) Add Cavium ThunderX driver, from Sunil Goutham.

23) Allow bpf programs to access skb_iif and dev->ifindex SKB metadata,
    from Alexei Starovoitov.

24) Add support for T6 chips in cxgb4vf driver, from Hariprasad Shenai.

25) Double TCP Small Queues default to 256K to accomodate situations
    like the XEN driver and wireless aggregation.  From Wei Liu.

26) Add more entropy inputs to flow dissector, from Tom Herbert.

27) Add CDG congestion control algorithm to TCP, from Kenneth Klette
    Jonassen.

28) Convert ipset over to RCU locking, from Jozsef Kadlecsik.

29) Track and act upon link status of ipv4 route nexthops, from Andy
    Gospodarek.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1670 commits)
  bridge: vlan: flush the dynamically learned entries on port vlan delete
  bridge: multicast: add a comment to br_port_state_selection about blocking state
  net: inet_diag: export IPV6_V6ONLY sockopt
  stmmac: troubleshoot unexpected bits in des0 & des1
  net: ipv4 sysctl option to ignore routes when nexthop link is down
  net: track link-status of ipv4 nexthops
  net: switchdev: ignore unsupported bridge flags
  net: Cavium: Fix MAC address setting in shutdown state
  drivers: net: xgene: fix for ACPI support without ACPI
  ip: report the original address of ICMP messages
  net/mlx5e: Prefetch skb data on RX
  net/mlx5e: Pop cq outside mlx5e_get_cqe
  net/mlx5e: Remove mlx5e_cq.sqrq back-pointer
  net/mlx5e: Remove extra spaces
  net/mlx5e: Avoid TX CQE generation if more xmit packets expected
  net/mlx5e: Avoid redundant dev_kfree_skb() upon NOP completion
  net/mlx5e: Remove re-assignment of wq type in mlx5e_enable_rq()
  net/mlx5e: Use skb_shinfo(skb)->gso_segs rather than counting them
  net/mlx5e: Static mapping of netdev priv resources to/from netdev TX queues
  net/mlx4_en: Use HW counters for rx/tx bytes/packets in PF device
  ...

14 files changed, 688 insertions, 27 deletions

diff --git a/net/nfc/af_nfc.c b/net/nfc/af_nfc.c
index 2277276f52bc..54e40fa47822 100644
--- a/net/nfc/af_nfc.c
+++ b/net/nfc/af_nfc.c
@@ -40,7 +40,7 @@ static int nfc_sock_create(struct net *net, struct socket *sock, int proto,
 
 	read_lock(&proto_tab_lock);
 	if (proto_tab[proto] &&	try_module_get(proto_tab[proto]->owner)) {
-		rc = proto_tab[proto]->create(net, sock, proto_tab[proto]);
+		rc = proto_tab[proto]->create(net, sock, proto_tab[proto], kern);
 		module_put(proto_tab[proto]->owner);
 	}
 	read_unlock(&proto_tab_lock);
diff --git a/net/nfc/llcp.h b/net/nfc/llcp.h
index de1789e3cc82..1f68724d44d3 100644
--- a/net/nfc/llcp.h
+++ b/net/nfc/llcp.h
@@ -225,7 +225,7 @@ void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local,
 			       struct sk_buff *skb, u8 direction);
 
 /* Sock API */
-struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp);
+struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp, int kern);
 void nfc_llcp_sock_free(struct nfc_llcp_sock *sock);
 void nfc_llcp_accept_unlink(struct sock *sk);
 void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk);
diff --git a/net/nfc/llcp_core.c b/net/nfc/llcp_core.c
index b18f07ccb504..98876274a1ee 100644
--- a/net/nfc/llcp_core.c
+++ b/net/nfc/llcp_core.c
@@ -934,7 +934,7 @@ static void nfc_llcp_recv_connect(struct nfc_llcp_local *local,
 		sock->ssap = ssap;
 	}
 
-	new_sk = nfc_llcp_sock_alloc(NULL, parent->sk_type, GFP_ATOMIC);
+	new_sk = nfc_llcp_sock_alloc(NULL, parent->sk_type, GFP_ATOMIC, 0);
 	if (new_sk == NULL) {
 		reason = LLCP_DM_REJ;
 		release_sock(&sock->sk);
diff --git a/net/nfc/llcp_sock.c b/net/nfc/llcp_sock.c
index 9578bd6a4f3e..b7de0da46acd 100644
--- a/net/nfc/llcp_sock.c
+++ b/net/nfc/llcp_sock.c
@@ -942,12 +942,12 @@ static void llcp_sock_destruct(struct sock *sk)
 	}
 }
 
-struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp)
+struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp, int kern)
 {
 	struct sock *sk;
 	struct nfc_llcp_sock *llcp_sock;
 
-	sk = sk_alloc(&init_net, PF_NFC, gfp, &llcp_sock_proto);
+	sk = sk_alloc(&init_net, PF_NFC, gfp, &llcp_sock_proto, kern);
 	if (!sk)
 		return NULL;
 
@@ -993,7 +993,7 @@ void nfc_llcp_sock_free(struct nfc_llcp_sock *sock)
 }
 
 static int llcp_sock_create(struct net *net, struct socket *sock,
-			    const struct nfc_protocol *nfc_proto)
+			    const struct nfc_protocol *nfc_proto, int kern)
 {
 	struct sock *sk;
 
@@ -1009,7 +1009,7 @@ static int llcp_sock_create(struct net *net, struct socket *sock,
 	else
 		sock->ops = &llcp_sock_ops;
 
-	sk = nfc_llcp_sock_alloc(sock, sock->type, GFP_ATOMIC);
+	sk = nfc_llcp_sock_alloc(sock, sock->type, GFP_ATOMIC, kern);
 	if (sk == NULL)
 		return -ENOMEM;
 
diff --git a/net/nfc/nci/Kconfig b/net/nfc/nci/Kconfig
index a4f1e42e3481..901c1ddba841 100644
--- a/net/nfc/nci/Kconfig
+++ b/net/nfc/nci/Kconfig
@@ -19,3 +19,10 @@ config NFC_NCI_SPI
 	  an NFC Controller (NFCC) and a Device Host (DH).
 
 	  Say yes if you use an NCI driver that requires SPI link layer.
+
+config NFC_NCI_UART
+	depends on NFC_NCI && TTY
+	tristate "NCI over UART protocol support"
+	default n
+	help
+	  Say yes if you use an NCI driver that requires UART link layer.
diff --git a/net/nfc/nci/Makefile b/net/nfc/nci/Makefile
index 7ed8949266cc..b4b85b82e988 100644
--- a/net/nfc/nci/Makefile
+++ b/net/nfc/nci/Makefile
@@ -7,3 +7,6 @@ obj-$(CONFIG_NFC_NCI) += nci.o
 nci-objs := core.o data.o lib.o ntf.o rsp.o hci.o
 
 nci-$(CONFIG_NFC_NCI_SPI) += spi.o
+
+nci_uart-y += uart.o
+obj-$(CONFIG_NFC_NCI_UART) += nci_uart.o
diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c
index 49ff32106080..95af2d24d5be 100644
--- a/net/nfc/nci/core.c
+++ b/net/nfc/nci/core.c
@@ -28,6 +28,7 @@
 #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
 
 #include <linux/module.h>
+#include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/workqueue.h>
 #include <linux/completion.h>
@@ -73,6 +74,7 @@ void nci_req_complete(struct nci_dev *ndev, int result)
 		complete(&ndev->req_completion);
 	}
 }
+EXPORT_SYMBOL(nci_req_complete);
 
 static void nci_req_cancel(struct nci_dev *ndev, int err)
 {
@@ -323,6 +325,32 @@ static void nci_rf_deactivate_req(struct nci_dev *ndev, unsigned long opt)
 		     sizeof(struct nci_rf_deactivate_cmd), &cmd);
 }
 
+struct nci_prop_cmd_param {
+	__u16 opcode;
+	size_t len;
+	__u8 *payload;
+};
+
+static void nci_prop_cmd_req(struct nci_dev *ndev, unsigned long opt)
+{
+	struct nci_prop_cmd_param *param = (struct nci_prop_cmd_param *)opt;
+
+	nci_send_cmd(ndev, param->opcode, param->len, param->payload);
+}
+
+int nci_prop_cmd(struct nci_dev *ndev, __u8 oid, size_t len, __u8 *payload)
+{
+	struct nci_prop_cmd_param param;
+
+	param.opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, oid);
+	param.len = len;
+	param.payload = payload;
+
+	return __nci_request(ndev, nci_prop_cmd_req, (unsigned long)&param,
+			     msecs_to_jiffies(NCI_CMD_TIMEOUT));
+}
+EXPORT_SYMBOL(nci_prop_cmd);
+
 static int nci_open_device(struct nci_dev *ndev)
 {
 	int rc = 0;
@@ -343,11 +371,17 @@ static int nci_open_device(struct nci_dev *ndev)
 
 	set_bit(NCI_INIT, &ndev->flags);
 
-	rc = __nci_request(ndev, nci_reset_req, 0,
-			   msecs_to_jiffies(NCI_RESET_TIMEOUT));
+	if (ndev->ops->init)
+		rc = ndev->ops->init(ndev);
 
-	if (ndev->ops->setup)
-		ndev->ops->setup(ndev);
+	if (!rc) {
+		rc = __nci_request(ndev, nci_reset_req, 0,
+				   msecs_to_jiffies(NCI_RESET_TIMEOUT));
+	}
+
+	if (!rc && ndev->ops->setup) {
+		rc = ndev->ops->setup(ndev);
+	}
 
 	if (!rc) {
 		rc = __nci_request(ndev, nci_init_req, 0,
@@ -407,6 +441,12 @@ static int nci_close_device(struct nci_dev *ndev)
 	set_bit(NCI_INIT, &ndev->flags);
 	__nci_request(ndev, nci_reset_req, 0,
 		      msecs_to_jiffies(NCI_RESET_TIMEOUT));
+
+	/* After this point our queues are empty
+	 * and no works are scheduled.
+	 */
+	ndev->ops->close(ndev);
+
 	clear_bit(NCI_INIT, &ndev->flags);
 
 	del_timer_sync(&ndev->cmd_timer);
@@ -414,10 +454,6 @@ static int nci_close_device(struct nci_dev *ndev)
 	/* Flush cmd wq */
 	flush_workqueue(ndev->cmd_wq);
 
-	/* After this point our queues are empty
-	 * and no works are scheduled. */
-	ndev->ops->close(ndev);
-
 	/* Clear flags */
 	ndev->flags = 0;
 
@@ -762,7 +798,7 @@ static void nci_deactivate_target(struct nfc_dev *nfc_dev,
 
 	if (atomic_read(&ndev->state) == NCI_POLL_ACTIVE) {
 		nci_request(ndev, nci_rf_deactivate_req,
-			    NCI_DEACTIVATE_TYPE_SLEEP_MODE,
+			    NCI_DEACTIVATE_TYPE_IDLE_MODE,
 			    msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
 	}
 }
@@ -961,6 +997,14 @@ struct nci_dev *nci_allocate_device(struct nci_ops *ops,
 		return NULL;
 
 	ndev->ops = ops;
+
+	if (ops->n_prop_ops > NCI_MAX_PROPRIETARY_CMD) {
+		pr_err("Too many proprietary commands: %zd\n",
+		       ops->n_prop_ops);
+		ops->prop_ops = NULL;
+		ops->n_prop_ops = 0;
+	}
+
 	ndev->tx_headroom = tx_headroom;
 	ndev->tx_tailroom = tx_tailroom;
 	init_completion(&ndev->req_completion);
@@ -1165,6 +1209,49 @@ int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload)
 	return 0;
 }
 
+/* Proprietary commands API */
+static struct nci_prop_ops *prop_cmd_lookup(struct nci_dev *ndev,
+					    __u16 opcode)
+{
+	size_t i;
+	struct nci_prop_ops *prop_op;
+
+	if (!ndev->ops->prop_ops || !ndev->ops->n_prop_ops)
+		return NULL;
+
+	for (i = 0; i < ndev->ops->n_prop_ops; i++) {
+		prop_op = &ndev->ops->prop_ops[i];
+		if (prop_op->opcode == opcode)
+			return prop_op;
+	}
+
+	return NULL;
+}
+
+int nci_prop_rsp_packet(struct nci_dev *ndev, __u16 rsp_opcode,
+			struct sk_buff *skb)
+{
+	struct nci_prop_ops *prop_op;
+
+	prop_op = prop_cmd_lookup(ndev, rsp_opcode);
+	if (!prop_op || !prop_op->rsp)
+		return -ENOTSUPP;
+
+	return prop_op->rsp(ndev, skb);
+}
+
+int nci_prop_ntf_packet(struct nci_dev *ndev, __u16 ntf_opcode,
+			struct sk_buff *skb)
+{
+	struct nci_prop_ops *prop_op;
+
+	prop_op = prop_cmd_lookup(ndev, ntf_opcode);
+	if (!prop_op || !prop_op->ntf)
+		return -ENOTSUPP;
+
+	return prop_op->ntf(ndev, skb);
+}
+
 /* ---- NCI TX Data worker thread ---- */
 
 static void nci_tx_work(struct work_struct *work)
diff --git a/net/nfc/nci/hci.c b/net/nfc/nci/hci.c
index ed54ec533836..af002df640c7 100644
--- a/net/nfc/nci/hci.c
+++ b/net/nfc/nci/hci.c
@@ -639,22 +639,19 @@ int nci_hci_dev_session_init(struct nci_dev *ndev)
 				 ndev->hci_dev->init_data.gates[0].gate,
 				 ndev->hci_dev->init_data.gates[0].pipe);
 	if (r < 0)
-		goto exit;
+		return r;
 
 	r = nci_hci_get_param(ndev, NCI_HCI_ADMIN_GATE,
 			      NCI_HCI_ADMIN_PARAM_SESSION_IDENTITY, &skb);
 	if (r < 0)
-		goto exit;
+		return r;
 
 	if (skb->len &&
 	    skb->len == strlen(ndev->hci_dev->init_data.session_id) &&
-	    memcmp(ndev->hci_dev->init_data.session_id,
-		   skb->data, skb->len) == 0 &&
+	    !memcmp(ndev->hci_dev->init_data.session_id, skb->data, skb->len) &&
 	    ndev->ops->hci_load_session) {
 		/* Restore gate<->pipe table from some proprietary location. */
 		r = ndev->ops->hci_load_session(ndev);
-		if (r < 0)
-			goto exit;
 	} else {
 		r = nci_hci_dev_connect_gates(ndev,
 					      ndev->hci_dev->init_data.gate_count,
@@ -667,8 +664,6 @@ int nci_hci_dev_session_init(struct nci_dev *ndev)
 				      ndev->hci_dev->init_data.session_id,
 				      strlen(ndev->hci_dev->init_data.session_id));
 	}
-	if (r == 0)
-		goto exit;
 
 exit:
 	kfree_skb(skb);
diff --git a/net/nfc/nci/ntf.c b/net/nfc/nci/ntf.c
index 3218071072ac..5d1c2e391c56 100644
--- a/net/nfc/nci/ntf.c
+++ b/net/nfc/nci/ntf.c
@@ -758,6 +758,15 @@ void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb)
 	/* strip the nci control header */
 	skb_pull(skb, NCI_CTRL_HDR_SIZE);
 
+	if (nci_opcode_gid(ntf_opcode) == NCI_GID_PROPRIETARY) {
+		if (nci_prop_ntf_packet(ndev, ntf_opcode, skb)) {
+			pr_err("unsupported ntf opcode 0x%x\n",
+			       ntf_opcode);
+		}
+
+		goto end;
+	}
+
 	switch (ntf_opcode) {
 	case NCI_OP_CORE_CONN_CREDITS_NTF:
 		nci_core_conn_credits_ntf_packet(ndev, skb);
@@ -796,5 +805,6 @@ void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb)
 		break;
 	}
 
+end:
 	kfree_skb(skb);
 }
diff --git a/net/nfc/nci/rsp.c b/net/nfc/nci/rsp.c
index 02486bc2ceea..408bd8f857ab 100644
--- a/net/nfc/nci/rsp.c
+++ b/net/nfc/nci/rsp.c
@@ -296,6 +296,15 @@ void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
 	/* strip the nci control header */
 	skb_pull(skb, NCI_CTRL_HDR_SIZE);
 
+	if (nci_opcode_gid(rsp_opcode) == NCI_GID_PROPRIETARY) {
+		if (nci_prop_rsp_packet(ndev, rsp_opcode, skb) == -ENOTSUPP) {
+			pr_err("unsupported rsp opcode 0x%x\n",
+			       rsp_opcode);
+		}
+
+		goto end;
+	}
+
 	switch (rsp_opcode) {
 	case NCI_OP_CORE_RESET_RSP:
 		nci_core_reset_rsp_packet(ndev, skb);
@@ -346,6 +355,7 @@ void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb)
 		break;
 	}
 
+end:
 	kfree_skb(skb);
 
 	/* trigger the next cmd */
diff --git a/net/nfc/nci/uart.c b/net/nfc/nci/uart.c
new file mode 100644
index 000000000000..21d8875673a4
--- /dev/null
+++ b/net/nfc/nci/uart.c
@@ -0,0 +1,494 @@
+/*
+ * Copyright (C) 2015, Marvell International Ltd.
+ *
+ * This software file (the "File") is distributed by Marvell International
+ * Ltd. under the terms of the GNU General Public License Version 2, June 1991
+ * (the "License").  You may use, redistribute and/or modify this File in
+ * accordance with the terms and conditions of the License, a copy of which
+ * is available on the worldwide web at
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
+ *
+ * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
+ * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
+ * this warranty disclaimer.
+ */
+
+/* Inspired (hugely) by HCI LDISC implementation in Bluetooth.
+ *
+ *  Copyright (C) 2000-2001  Qualcomm Incorporated
+ *  Copyright (C) 2002-2003  Maxim Krasnyansky <maxk@qualcomm.com>
+ *  Copyright (C) 2004-2005  Marcel Holtmann <marcel@holtmann.org>
+ */
+
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ptrace.h>
+#include <linux/poll.h>
+
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/signal.h>
+#include <linux/ioctl.h>
+#include <linux/skbuff.h>
+
+#include <net/nfc/nci.h>
+#include <net/nfc/nci_core.h>
+
+/* TX states  */
+#define NCI_UART_SENDING	1
+#define NCI_UART_TX_WAKEUP	2
+
+static struct nci_uart *nci_uart_drivers[NCI_UART_DRIVER_MAX];
+
+static inline struct sk_buff *nci_uart_dequeue(struct nci_uart *nu)
+{
+	struct sk_buff *skb = nu->tx_skb;
+
+	if (!skb)
+		skb = skb_dequeue(&nu->tx_q);
+	else
+		nu->tx_skb = NULL;
+
+	return skb;
+}
+
+static inline int nci_uart_queue_empty(struct nci_uart *nu)
+{
+	if (nu->tx_skb)
+		return 0;
+
+	return skb_queue_empty(&nu->tx_q);
+}
+
+static int nci_uart_tx_wakeup(struct nci_uart *nu)
+{
+	if (test_and_set_bit(NCI_UART_SENDING, &nu->tx_state)) {
+		set_bit(NCI_UART_TX_WAKEUP, &nu->tx_state);
+		return 0;
+	}
+
+	schedule_work(&nu->write_work);
+
+	return 0;
+}
+
+static void nci_uart_write_work(struct work_struct *work)
+{
+	struct nci_uart *nu = container_of(work, struct nci_uart, write_work);
+	struct tty_struct *tty = nu->tty;
+	struct sk_buff *skb;
+
+restart:
+	clear_bit(NCI_UART_TX_WAKEUP, &nu->tx_state);
+
+	if (nu->ops.tx_start)
+		nu->ops.tx_start(nu);
+
+	while ((skb = nci_uart_dequeue(nu))) {
+		int len;
+
+		set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
+		len = tty->ops->write(tty, skb->data, skb->len);
+		skb_pull(skb, len);
+		if (skb->len) {
+			nu->tx_skb = skb;
+			break;
+		}
+		kfree_skb(skb);
+	}
+
+	if (test_bit(NCI_UART_TX_WAKEUP, &nu->tx_state))
+		goto restart;
+
+	if (nu->ops.tx_done && nci_uart_queue_empty(nu))
+		nu->ops.tx_done(nu);
+
+	clear_bit(NCI_UART_SENDING, &nu->tx_state);
+}
+
+static int nci_uart_set_driver(struct tty_struct *tty, unsigned int driver)
+{
+	struct nci_uart *nu = NULL;
+	int ret;
+
+	if (driver >= NCI_UART_DRIVER_MAX)
+		return -EINVAL;
+
+	if (!nci_uart_drivers[driver])
+		return -ENOENT;
+
+	nu = kzalloc(sizeof(*nu), GFP_KERNEL);
+	if (!nu)
+		return -ENOMEM;
+
+	memcpy(nu, nci_uart_drivers[driver], sizeof(struct nci_uart));
+	nu->tty = tty;
+	tty->disc_data = nu;
+	skb_queue_head_init(&nu->tx_q);
+	INIT_WORK(&nu->write_work, nci_uart_write_work);
+	spin_lock_init(&nu->rx_lock);
+
+	ret = nu->ops.open(nu);
+	if (ret) {
+		tty->disc_data = NULL;
+		kfree(nu);
+	} else if (!try_module_get(nu->owner)) {
+		nu->ops.close(nu);
+		tty->disc_data = NULL;
+		kfree(nu);
+		return -ENOENT;
+	}
+	return ret;
+}
+
+/* ------ LDISC part ------ */
+
+/* nci_uart_tty_open
+ *
+ *     Called when line discipline changed to NCI_UART.
+ *
+ * Arguments:
+ *     tty    pointer to tty info structure
+ * Return Value:
+ *     0 if success, otherwise error code
+ */
+static int nci_uart_tty_open(struct tty_struct *tty)
+{
+	/* Error if the tty has no write op instead of leaving an exploitable
+	 * hole
+	 */
+	if (!tty->ops->write)
+		return -EOPNOTSUPP;
+
+	tty->disc_data = NULL;
+	tty->receive_room = 65536;
+
+	/* Flush any pending characters in the driver and line discipline. */
+
+	/* FIXME: why is this needed. Note don't use ldisc_ref here as the
+	 * open path is before the ldisc is referencable.
+	 */
+
+	if (tty->ldisc->ops->flush_buffer)
+		tty->ldisc->ops->flush_buffer(tty);
+	tty_driver_flush_buffer(tty);
+
+	return 0;
+}
+
+/* nci_uart_tty_close()
+ *
+ *    Called when the line discipline is changed to something
+ *    else, the tty is closed, or the tty detects a hangup.
+ */
+static void nci_uart_tty_close(struct tty_struct *tty)
+{
+	struct nci_uart *nu = (void *)tty->disc_data;
+
+	/* Detach from the tty */
+	tty->disc_data = NULL;
+
+	if (!nu)
+		return;
+
+	if (nu->tx_skb)
+		kfree_skb(nu->tx_skb);
+	if (nu->rx_skb)
+		kfree_skb(nu->rx_skb);
+
+	skb_queue_purge(&nu->tx_q);
+
+	nu->ops.close(nu);
+	nu->tty = NULL;
+	module_put(nu->owner);
+
+	cancel_work_sync(&nu->write_work);
+
+	kfree(nu);
+}
+
+/* nci_uart_tty_wakeup()
+ *
+ *    Callback for transmit wakeup. Called when low level
+ *    device driver can accept more send data.
+ *
+ * Arguments:        tty    pointer to associated tty instance data
+ * Return Value:    None
+ */
+static void nci_uart_tty_wakeup(struct tty_struct *tty)
+{
+	struct nci_uart *nu = (void *)tty->disc_data;
+
+	if (!nu)
+		return;
+
+	clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
+
+	if (tty != nu->tty)
+		return;
+
+	nci_uart_tx_wakeup(nu);
+}
+
+/* nci_uart_tty_receive()
+ *
+ *     Called by tty low level driver when receive data is
+ *     available.
+ *
+ * Arguments:  tty          pointer to tty isntance data
+ *             data         pointer to received data
+ *             flags        pointer to flags for data
+ *             count        count of received data in bytes
+ *
+ * Return Value:    None
+ */
+static void nci_uart_tty_receive(struct tty_struct *tty, const u8 *data,
+				 char *flags, int count)
+{
+	struct nci_uart *nu = (void *)tty->disc_data;
+
+	if (!nu || tty != nu->tty)
+		return;
+
+	spin_lock(&nu->rx_lock);
+	nu->ops.recv_buf(nu, (void *)data, flags, count);
+	spin_unlock(&nu->rx_lock);
+
+	tty_unthrottle(tty);
+}
+
+/* nci_uart_tty_ioctl()
+ *
+ *    Process IOCTL system call for the tty device.
+ *
+ * Arguments:
+ *
+ *    tty        pointer to tty instance data
+ *    file       pointer to open file object for device
+ *    cmd        IOCTL command code
+ *    arg        argument for IOCTL call (cmd dependent)
+ *
+ * Return Value:    Command dependent
+ */
+static int nci_uart_tty_ioctl(struct tty_struct *tty, struct file *file,
+			      unsigned int cmd, unsigned long arg)
+{
+	struct nci_uart *nu = (void *)tty->disc_data;
+	int err = 0;
+
+	switch (cmd) {
+	case NCIUARTSETDRIVER:
+		if (!nu)
+			return nci_uart_set_driver(tty, (unsigned int)arg);
+		else
+			return -EBUSY;
+		break;
+	default:
+		err = n_tty_ioctl_helper(tty, file, cmd, arg);
+		break;
+	}
+
+	return err;
+}
+
+/* We don't provide read/write/poll interface for user space. */
+static ssize_t nci_uart_tty_read(struct tty_struct *tty, struct file *file,
+				 unsigned char __user *buf, size_t nr)
+{
+	return 0;
+}
+
+static ssize_t nci_uart_tty_write(struct tty_struct *tty, struct file *file,
+				  const unsigned char *data, size_t count)
+{
+	return 0;
+}
+
+static unsigned int nci_uart_tty_poll(struct tty_struct *tty,
+				      struct file *filp, poll_table *wait)
+{
+	return 0;
+}
+
+static int nci_uart_send(struct nci_uart *nu, struct sk_buff *skb)
+{
+	/* Queue TX packet */
+	skb_queue_tail(&nu->tx_q, skb);
+
+	/* Try to start TX (if possible) */
+	nci_uart_tx_wakeup(nu);
+
+	return 0;
+}
+
+/* -- Default recv_buf handler --
+ *
+ * This handler supposes that NCI frames are sent over UART link without any
+ * framing. It reads NCI header, retrieve the packet size and once all packet
+ * bytes are received it passes it to nci_uart driver for processing.
+ */
+static int nci_uart_default_recv_buf(struct nci_uart *nu, const u8 *data,
+				     char *flags, int count)
+{
+	int chunk_len;
+
+	if (!nu->ndev) {
+		nfc_err(nu->tty->dev,
+			"receive data from tty but no NCI dev is attached yet, drop buffer\n");
+		return 0;
+	}
+
+	/* Decode all incoming data in packets
+	 * and enqueue then for processing.
+	 */
+	while (count > 0) {
+		/* If this is the first data of a packet, allocate a buffer */
+		if (!nu->rx_skb) {
+			nu->rx_packet_len = -1;
+			nu->rx_skb = nci_skb_alloc(nu->ndev,
+						   NCI_MAX_PACKET_SIZE,
+						   GFP_KERNEL);
+			if (!nu->rx_skb)
+				return -ENOMEM;
+		}
+
+		/* Eat byte after byte till full packet header is received */
+		if (nu->rx_skb->len < NCI_CTRL_HDR_SIZE) {
+			*skb_put(nu->rx_skb, 1) = *data++;
+			--count;
+			continue;
+		}
+
+		/* Header was received but packet len was not read */
+		if (nu->rx_packet_len < 0)
+			nu->rx_packet_len = NCI_CTRL_HDR_SIZE +
+				nci_plen(nu->rx_skb->data);
+
+		/* Compute how many bytes are missing and how many bytes can
+		 * be consumed.
+		 */
+		chunk_len = nu->rx_packet_len - nu->rx_skb->len;
+		if (count < chunk_len)
+			chunk_len = count;
+		memcpy(skb_put(nu->rx_skb, chunk_len), data, chunk_len);
+		data += chunk_len;
+		count -= chunk_len;
+
+		/* Chcek if packet is fully received */
+		if (nu->rx_packet_len == nu->rx_skb->len) {
+			/* Pass RX packet to driver */
+			if (nu->ops.recv(nu, nu->rx_skb) != 0)
+				nfc_err(nu->tty->dev, "corrupted RX packet\n");
+			/* Next packet will be a new one */
+			nu->rx_skb = NULL;
+		}
+	}
+
+	return 0;
+}
+
+/* -- Default recv handler -- */
+static int nci_uart_default_recv(struct nci_uart *nu, struct sk_buff *skb)
+{
+	return nci_recv_frame(nu->ndev, skb);
+}
+
+int nci_uart_register(struct nci_uart *nu)
+{
+	if (!nu || !nu->ops.open ||
+	    !nu->ops.recv || !nu->ops.close)
+		return -EINVAL;
+
+	/* Set the send callback */
+	nu->ops.send = nci_uart_send;
+
+	/* Install default handlers if not overridden */
+	if (!nu->ops.recv_buf)
+		nu->ops.recv_buf = nci_uart_default_recv_buf;
+	if (!nu->ops.recv)
+		nu->ops.recv = nci_uart_default_recv;
+
+	/* Add this driver in the driver list */
+	if (nci_uart_drivers[nu->driver]) {
+		pr_err("driver %d is already registered\n", nu->driver);
+		return -EBUSY;
+	}
+	nci_uart_drivers[nu->driver] = nu;
+
+	pr_info("NCI uart driver '%s [%d]' registered\n", nu->name, nu->driver);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(nci_uart_register);
+
+void nci_uart_unregister(struct nci_uart *nu)
+{
+	pr_info("NCI uart driver '%s [%d]' unregistered\n", nu->name,
+		nu->driver);
+
+	/* Remove this driver from the driver list */
+	nci_uart_drivers[nu->driver] = NULL;
+}
+EXPORT_SYMBOL_GPL(nci_uart_unregister);
+
+void nci_uart_set_config(struct nci_uart *nu, int baudrate, int flow_ctrl)
+{
+	struct ktermios new_termios;
+
+	if (!nu->tty)
+		return;
+
+	down_read(&nu->tty->termios_rwsem);
+	new_termios = nu->tty->termios;
+	up_read(&nu->tty->termios_rwsem);
+	tty_termios_encode_baud_rate(&new_termios, baudrate, baudrate);
+
+	if (flow_ctrl)
+		new_termios.c_cflag |= CRTSCTS;
+	else
+		new_termios.c_cflag &= ~CRTSCTS;
+
+	tty_set_termios(nu->tty, &new_termios);
+}
+EXPORT_SYMBOL_GPL(nci_uart_set_config);
+
+static struct tty_ldisc_ops nci_uart_ldisc = {
+	.magic		= TTY_LDISC_MAGIC,
+	.owner		= THIS_MODULE,
+	.name		= "n_nci",
+	.open		= nci_uart_tty_open,
+	.close		= nci_uart_tty_close,
+	.read		= nci_uart_tty_read,
+	.write		= nci_uart_tty_write,
+	.poll		= nci_uart_tty_poll,
+	.receive_buf	= nci_uart_tty_receive,
+	.write_wakeup	= nci_uart_tty_wakeup,
+	.ioctl		= nci_uart_tty_ioctl,
+};
+
+static int __init nci_uart_init(void)
+{
+	memset(nci_uart_drivers, 0, sizeof(nci_uart_drivers));
+	return tty_register_ldisc(N_NCI, &nci_uart_ldisc);
+}
+
+static void __exit nci_uart_exit(void)
+{
+	tty_unregister_ldisc(N_NCI);
+}
+
+module_init(nci_uart_init);
+module_exit(nci_uart_exit);
+
+MODULE_AUTHOR("Marvell International Ltd.");
+MODULE_DESCRIPTION("NFC NCI UART driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_LDISC(N_NCI);
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 3763036710ae..f85f37ed19b2 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -5,6 +5,12 @@
  *    Lauro Ramos Venancio <lauro.venancio@openbossa.org>
  *    Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
  *
+ * Vendor commands implementation based on net/wireless/nl80211.c
+ * which is:
+ *
+ * Copyright 2006-2010	Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2013-2014  Intel Mobile Communications GmbH
+ *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
@@ -1489,6 +1495,50 @@ static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
 	return nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
 }
 
+static int nfc_genl_vendor_cmd(struct sk_buff *skb,
+			       struct genl_info *info)
+{
+	struct nfc_dev *dev;
+	struct nfc_vendor_cmd *cmd;
+	u32 dev_idx, vid, subcmd;
+	u8 *data;
+	size_t data_len;
+	int i;
+
+	if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
+	    !info->attrs[NFC_ATTR_VENDOR_ID] ||
+	    !info->attrs[NFC_ATTR_VENDOR_SUBCMD])
+		return -EINVAL;
+
+	dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
+	vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]);
+	subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]);
+
+	dev = nfc_get_device(dev_idx);
+	if (!dev || !dev->vendor_cmds || !dev->n_vendor_cmds)
+		return -ENODEV;
+
+	data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]);
+	if (data) {
+		data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]);
+		if (data_len == 0)
+			return -EINVAL;
+	} else {
+		data_len = 0;
+	}
+
+	for (i = 0; i < dev->n_vendor_cmds; i++) {
+		cmd = &dev->vendor_cmds[i];
+
+		if (cmd->vendor_id != vid || cmd->subcmd != subcmd)
+			continue;
+
+		return cmd->doit(dev, data, data_len);
+	}
+
+	return -EOPNOTSUPP;
+}
+
 static const struct genl_ops nfc_genl_ops[] = {
 	{
 		.cmd = NFC_CMD_GET_DEVICE,
@@ -1579,6 +1629,11 @@ static const struct genl_ops nfc_genl_ops[] = {
 		.doit = nfc_genl_activate_target,
 		.policy = nfc_genl_policy,
 	},
+	{
+		.cmd = NFC_CMD_VENDOR,
+		.doit = nfc_genl_vendor_cmd,
+		.policy = nfc_genl_policy,
+	},
 };
 
 
diff --git a/net/nfc/nfc.h b/net/nfc/nfc.h
index a8ce80b47720..5c93e8412a26 100644
--- a/net/nfc/nfc.h
+++ b/net/nfc/nfc.h
@@ -30,7 +30,7 @@ struct nfc_protocol {
 	struct proto *proto;
 	struct module *owner;
 	int (*create)(struct net *net, struct socket *sock,
-		      const struct nfc_protocol *nfc_proto);
+		      const struct nfc_protocol *nfc_proto, int kern);
 };
 
 struct nfc_rawsock {
diff --git a/net/nfc/rawsock.c b/net/nfc/rawsock.c
index 82b4e8024778..e9a91488fe3d 100644
--- a/net/nfc/rawsock.c
+++ b/net/nfc/rawsock.c
@@ -334,7 +334,7 @@ static void rawsock_destruct(struct sock *sk)
 }
 
 static int rawsock_create(struct net *net, struct socket *sock,
-			  const struct nfc_protocol *nfc_proto)
+			  const struct nfc_protocol *nfc_proto, int kern)
 {
 	struct sock *sk;
 
@@ -348,7 +348,7 @@ static int rawsock_create(struct net *net, struct socket *sock,
 	else
 		sock->ops = &rawsock_ops;
 
-	sk = sk_alloc(net, PF_NFC, GFP_ATOMIC, nfc_proto->proto);
+	sk = sk_alloc(net, PF_NFC, GFP_ATOMIC, nfc_proto->proto, kern);
 	if (!sk)
 		return -ENOMEM;