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
  ...

1 files changed, 969 insertions, 0 deletions

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
new file mode 100644
index 0000000..6b9b912
--- /dev/null
+++ b/drivers/bluetooth/hci_qca.c
@@ -0,0 +1,969 @@
+/*
+ *  Bluetooth Software UART Qualcomm protocol
+ *
+ *  HCI_IBS (HCI In-Band Sleep) is Qualcomm's power management
+ *  protocol extension to H4.
+ *
+ *  Copyright (C) 2007 Texas Instruments, Inc.
+ *  Copyright (c) 2010, 2012 The Linux Foundation. All rights reserved.
+ *
+ *  Acknowledgements:
+ *  This file is based on hci_ll.c, which was...
+ *  Written by Ohad Ben-Cohen <ohad@bencohen.org>
+ *  which was in turn based on hci_h4.c, which was written
+ *  by Maxim Krasnyansky and Marcel Holtmann.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2
+ *  as published by the Free Software Foundation
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/debugfs.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#include "hci_uart.h"
+#include "btqca.h"
+
+/* HCI_IBS protocol messages */
+#define HCI_IBS_SLEEP_IND	0xFE
+#define HCI_IBS_WAKE_IND	0xFD
+#define HCI_IBS_WAKE_ACK	0xFC
+#define HCI_MAX_IBS_SIZE 	10
+
+/* Controller states */
+#define STATE_IN_BAND_SLEEP_ENABLED	1
+
+#define IBS_WAKE_RETRANS_TIMEOUT_MS 	100
+#define IBS_TX_IDLE_TIMEOUT_MS 		2000
+#define BAUDRATE_SETTLE_TIMEOUT_MS	300
+
+/* HCI_IBS transmit side sleep protocol states */
+enum tx_ibs_states {
+	HCI_IBS_TX_ASLEEP,
+	HCI_IBS_TX_WAKING,
+	HCI_IBS_TX_AWAKE,
+};
+
+/* HCI_IBS receive side sleep protocol states */
+enum rx_states {
+	HCI_IBS_RX_ASLEEP,
+	HCI_IBS_RX_AWAKE,
+};
+
+/* HCI_IBS transmit and receive side clock state vote */
+enum hci_ibs_clock_state_vote {
+	HCI_IBS_VOTE_STATS_UPDATE,
+	HCI_IBS_TX_VOTE_CLOCK_ON,
+	HCI_IBS_TX_VOTE_CLOCK_OFF,
+	HCI_IBS_RX_VOTE_CLOCK_ON,
+	HCI_IBS_RX_VOTE_CLOCK_OFF,
+};
+
+struct qca_data {
+	struct hci_uart *hu;
+	struct sk_buff *rx_skb;
+	struct sk_buff_head txq;
+	struct sk_buff_head tx_wait_q;	/* HCI_IBS wait queue	*/
+	spinlock_t hci_ibs_lock;	/* HCI_IBS state lock	*/
+	u8 tx_ibs_state;	/* HCI_IBS transmit side power state*/
+	u8 rx_ibs_state;	/* HCI_IBS receive side power state */
+	u32 tx_vote;		/* Clock must be on for TX */
+	u32 rx_vote;		/* Clock must be on for RX */
+	struct timer_list tx_idle_timer;
+	u32 tx_idle_delay;
+	struct timer_list wake_retrans_timer;
+	u32 wake_retrans;
+	struct workqueue_struct *workqueue;
+	struct work_struct ws_awake_rx;
+	struct work_struct ws_awake_device;
+	struct work_struct ws_rx_vote_off;
+	struct work_struct ws_tx_vote_off;
+	unsigned long flags;
+
+	/* For debugging purpose */
+	u64 ibs_sent_wacks;
+	u64 ibs_sent_slps;
+	u64 ibs_sent_wakes;
+	u64 ibs_recv_wacks;
+	u64 ibs_recv_slps;
+	u64 ibs_recv_wakes;
+	u64 vote_last_jif;
+	u32 vote_on_ms;
+	u32 vote_off_ms;
+	u64 tx_votes_on;
+	u64 rx_votes_on;
+	u64 tx_votes_off;
+	u64 rx_votes_off;
+	u64 votes_on;
+	u64 votes_off;
+};
+
+static void __serial_clock_on(struct tty_struct *tty)
+{
+	/* TODO: Some chipset requires to enable UART clock on client
+	 * side to save power consumption or manual work is required.
+	 * Please put your code to control UART clock here if needed
+	 */
+}
+
+static void __serial_clock_off(struct tty_struct *tty)
+{
+	/* TODO: Some chipset requires to disable UART clock on client
+	 * side to save power consumption or manual work is required.
+	 * Please put your code to control UART clock off here if needed
+	 */
+}
+
+/* serial_clock_vote needs to be called with the ibs lock held */
+static void serial_clock_vote(unsigned long vote, struct hci_uart *hu)
+{
+	struct qca_data *qca = hu->priv;
+	unsigned int diff;
+
+	bool old_vote = (qca->tx_vote | qca->rx_vote);
+	bool new_vote;
+
+	switch (vote) {
+	case HCI_IBS_VOTE_STATS_UPDATE:
+		diff = jiffies_to_msecs(jiffies - qca->vote_last_jif);
+
+		if (old_vote)
+			qca->vote_off_ms += diff;
+		else
+			qca->vote_on_ms += diff;
+		return;
+
+	case HCI_IBS_TX_VOTE_CLOCK_ON:
+		qca->tx_vote = true;
+		qca->tx_votes_on++;
+		new_vote = true;
+		break;
+
+	case HCI_IBS_RX_VOTE_CLOCK_ON:
+		qca->rx_vote = true;
+		qca->rx_votes_on++;
+		new_vote = true;
+		break;
+
+	case HCI_IBS_TX_VOTE_CLOCK_OFF:
+		qca->tx_vote = false;
+		qca->tx_votes_off++;
+		new_vote = qca->rx_vote | qca->tx_vote;
+		break;
+
+	case HCI_IBS_RX_VOTE_CLOCK_OFF:
+		qca->rx_vote = false;
+		qca->rx_votes_off++;
+		new_vote = qca->rx_vote | qca->tx_vote;
+		break;
+
+	default:
+		BT_ERR("Voting irregularity");
+		return;
+	}
+
+	if (new_vote != old_vote) {
+		if (new_vote)
+			__serial_clock_on(hu->tty);
+		else
+			__serial_clock_off(hu->tty);
+
+		BT_DBG("Vote serial clock %s(%s)", new_vote? "true" : "false",
+		       vote? "true" : "false");
+
+		diff = jiffies_to_msecs(jiffies - qca->vote_last_jif);
+
+		if (new_vote) {
+			qca->votes_on++;
+			qca->vote_off_ms += diff;
+		} else {
+			qca->votes_off++;
+			qca->vote_on_ms += diff;
+		}
+		qca->vote_last_jif = jiffies;
+	}
+}
+
+/* Builds and sends an HCI_IBS command packet.
+ * These are very simple packets with only 1 cmd byte.
+ */
+static int send_hci_ibs_cmd(u8 cmd, struct hci_uart *hu)
+{
+	int err = 0;
+	struct sk_buff *skb = NULL;
+	struct qca_data *qca = hu->priv;
+
+	BT_DBG("hu %p send hci ibs cmd 0x%x", hu, cmd);
+
+	skb = bt_skb_alloc(1, GFP_ATOMIC);
+	if (!skb) {
+		BT_ERR("Failed to allocate memory for HCI_IBS packet");
+		return -ENOMEM;
+	}
+
+	/* Assign HCI_IBS type */
+	*skb_put(skb, 1) = cmd;
+
+	skb_queue_tail(&qca->txq, skb);
+
+	return err;
+}
+
+static void qca_wq_awake_device(struct work_struct *work)
+{
+	struct qca_data *qca = container_of(work, struct qca_data,
+					    ws_awake_device);
+	struct hci_uart *hu = qca->hu;
+	unsigned long retrans_delay;
+
+	BT_DBG("hu %p wq awake device", hu);
+
+	/* Vote for serial clock */
+	serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_ON, hu);
+
+	spin_lock(&qca->hci_ibs_lock);
+
+	/* Send wake indication to device */
+	if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0)
+		BT_ERR("Failed to send WAKE to device");
+
+	qca->ibs_sent_wakes++;
+
+	/* Start retransmit timer */
+	retrans_delay = msecs_to_jiffies(qca->wake_retrans);
+	mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay);
+
+	spin_unlock(&qca->hci_ibs_lock);
+
+	/* Actually send the packets */
+	hci_uart_tx_wakeup(hu);
+}
+
+static void qca_wq_awake_rx(struct work_struct *work)
+{
+	struct qca_data *qca = container_of(work, struct qca_data,
+					    ws_awake_rx);
+	struct hci_uart *hu = qca->hu;
+
+	BT_DBG("hu %p wq awake rx", hu);
+
+	serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_ON, hu);
+
+	spin_lock(&qca->hci_ibs_lock);
+	qca->rx_ibs_state = HCI_IBS_RX_AWAKE;
+
+	/* Always acknowledge device wake up,
+	 * sending IBS message doesn't count as TX ON.
+	 */
+	if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0)
+		BT_ERR("Failed to acknowledge device wake up");
+
+	qca->ibs_sent_wacks++;
+
+	spin_unlock(&qca->hci_ibs_lock);
+
+	/* Actually send the packets */
+	hci_uart_tx_wakeup(hu);
+}
+
+static void qca_wq_serial_rx_clock_vote_off(struct work_struct *work)
+{
+	struct qca_data *qca = container_of(work, struct qca_data,
+					    ws_rx_vote_off);
+	struct hci_uart *hu = qca->hu;
+
+	BT_DBG("hu %p rx clock vote off", hu);
+
+	serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_OFF, hu);
+}
+
+static void qca_wq_serial_tx_clock_vote_off(struct work_struct *work)
+{
+	struct qca_data *qca = container_of(work, struct qca_data,
+					    ws_tx_vote_off);
+	struct hci_uart *hu = qca->hu;
+
+	BT_DBG("hu %p tx clock vote off", hu);
+
+	/* Run HCI tx handling unlocked */
+	hci_uart_tx_wakeup(hu);
+
+	/* Now that message queued to tty driver, vote for tty clocks off.
+	 * It is up to the tty driver to pend the clocks off until tx done.
+	 */
+	serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu);
+}
+
+static void hci_ibs_tx_idle_timeout(unsigned long arg)
+{
+	struct hci_uart *hu = (struct hci_uart *)arg;
+	struct qca_data *qca = hu->priv;
+	unsigned long flags;
+
+	BT_DBG("hu %p idle timeout in %d state", hu, qca->tx_ibs_state);
+
+	spin_lock_irqsave_nested(&qca->hci_ibs_lock,
+				 flags, SINGLE_DEPTH_NESTING);
+
+	switch (qca->tx_ibs_state) {
+	case HCI_IBS_TX_AWAKE:
+		/* TX_IDLE, go to SLEEP */
+		if (send_hci_ibs_cmd(HCI_IBS_SLEEP_IND, hu) < 0) {
+			BT_ERR("Failed to send SLEEP to device");
+			break;
+		}
+		qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
+		qca->ibs_sent_slps++;
+		queue_work(qca->workqueue, &qca->ws_tx_vote_off);
+		break;
+
+	case HCI_IBS_TX_ASLEEP:
+	case HCI_IBS_TX_WAKING:
+		/* Fall through */
+
+	default:
+		BT_ERR("Spurrious timeout tx state %d", qca->tx_ibs_state);
+		break;
+	}
+
+	spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
+}
+
+static void hci_ibs_wake_retrans_timeout(unsigned long arg)
+{
+	struct hci_uart *hu = (struct hci_uart *)arg;
+	struct qca_data *qca = hu->priv;
+	unsigned long flags, retrans_delay;
+	unsigned long retransmit = 0;
+
+	BT_DBG("hu %p wake retransmit timeout in %d state",
+		hu, qca->tx_ibs_state);
+
+	spin_lock_irqsave_nested(&qca->hci_ibs_lock,
+				 flags, SINGLE_DEPTH_NESTING);
+
+	switch (qca->tx_ibs_state) {
+	case HCI_IBS_TX_WAKING:
+		/* No WAKE_ACK, retransmit WAKE */
+		retransmit = 1;
+		if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0) {
+			BT_ERR("Failed to acknowledge device wake up");
+			break;
+		}
+		qca->ibs_sent_wakes++;
+		retrans_delay = msecs_to_jiffies(qca->wake_retrans);
+		mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay);
+		break;
+
+	case HCI_IBS_TX_ASLEEP:
+	case HCI_IBS_TX_AWAKE:
+		/* Fall through */
+
+	default:
+		BT_ERR("Spurrious timeout tx state %d", qca->tx_ibs_state);
+		break;
+	}
+
+	spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
+
+	if (retransmit)
+		hci_uart_tx_wakeup(hu);
+}
+
+/* Initialize protocol */
+static int qca_open(struct hci_uart *hu)
+{
+	struct qca_data *qca;
+
+	BT_DBG("hu %p qca_open", hu);
+
+	qca = kzalloc(sizeof(struct qca_data), GFP_ATOMIC);
+	if (!qca)
+		return -ENOMEM;
+
+	skb_queue_head_init(&qca->txq);
+	skb_queue_head_init(&qca->tx_wait_q);
+	spin_lock_init(&qca->hci_ibs_lock);
+	qca->workqueue = create_singlethread_workqueue("qca_wq");
+	if (!qca->workqueue) {
+		BT_ERR("QCA Workqueue not initialized properly");
+		kfree(qca);
+		return -ENOMEM;
+	}
+
+	INIT_WORK(&qca->ws_awake_rx, qca_wq_awake_rx);
+	INIT_WORK(&qca->ws_awake_device, qca_wq_awake_device);
+	INIT_WORK(&qca->ws_rx_vote_off, qca_wq_serial_rx_clock_vote_off);
+	INIT_WORK(&qca->ws_tx_vote_off, qca_wq_serial_tx_clock_vote_off);
+
+	qca->hu = hu;
+
+	/* Assume we start with both sides asleep -- extra wakes OK */
+	qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
+	qca->rx_ibs_state = HCI_IBS_RX_ASLEEP;
+
+	/* clocks actually on, but we start votes off */
+	qca->tx_vote = false;
+	qca->rx_vote = false;
+	qca->flags = 0;
+
+	qca->ibs_sent_wacks = 0;
+	qca->ibs_sent_slps = 0;
+	qca->ibs_sent_wakes = 0;
+	qca->ibs_recv_wacks = 0;
+	qca->ibs_recv_slps = 0;
+	qca->ibs_recv_wakes = 0;
+	qca->vote_last_jif = jiffies;
+	qca->vote_on_ms = 0;
+	qca->vote_off_ms = 0;
+	qca->votes_on = 0;
+	qca->votes_off = 0;
+	qca->tx_votes_on = 0;
+	qca->tx_votes_off = 0;
+	qca->rx_votes_on = 0;
+	qca->rx_votes_off = 0;
+
+	hu->priv = qca;
+
+	init_timer(&qca->wake_retrans_timer);
+	qca->wake_retrans_timer.function = hci_ibs_wake_retrans_timeout;
+	qca->wake_retrans_timer.data = (u_long)hu;
+	qca->wake_retrans = IBS_WAKE_RETRANS_TIMEOUT_MS;
+
+	init_timer(&qca->tx_idle_timer);
+	qca->tx_idle_timer.function = hci_ibs_tx_idle_timeout;
+	qca->tx_idle_timer.data = (u_long)hu;
+	qca->tx_idle_delay = IBS_TX_IDLE_TIMEOUT_MS;
+
+	BT_DBG("HCI_UART_QCA open, tx_idle_delay=%u, wake_retrans=%u",
+	       qca->tx_idle_delay, qca->wake_retrans);
+
+	return 0;
+}
+
+static void qca_debugfs_init(struct hci_dev *hdev)
+{
+	struct hci_uart *hu = hci_get_drvdata(hdev);
+	struct qca_data *qca = hu->priv;
+	struct dentry *ibs_dir;
+	umode_t mode;
+
+	if (!hdev->debugfs)
+		return;
+
+	ibs_dir = debugfs_create_dir("ibs", hdev->debugfs);
+
+	/* read only */
+	mode = S_IRUGO;
+	debugfs_create_u8("tx_ibs_state", mode, ibs_dir, &qca->tx_ibs_state);
+	debugfs_create_u8("rx_ibs_state", mode, ibs_dir, &qca->rx_ibs_state);
+	debugfs_create_u64("ibs_sent_sleeps", mode, ibs_dir,
+			   &qca->ibs_sent_slps);
+	debugfs_create_u64("ibs_sent_wakes", mode, ibs_dir,
+			   &qca->ibs_sent_wakes);
+	debugfs_create_u64("ibs_sent_wake_acks", mode, ibs_dir,
+			   &qca->ibs_sent_wacks);
+	debugfs_create_u64("ibs_recv_sleeps", mode, ibs_dir,
+			   &qca->ibs_recv_slps);
+	debugfs_create_u64("ibs_recv_wakes", mode, ibs_dir,
+			   &qca->ibs_recv_wakes);
+	debugfs_create_u64("ibs_recv_wake_acks", mode, ibs_dir,
+			   &qca->ibs_recv_wacks);
+	debugfs_create_bool("tx_vote", mode, ibs_dir, &qca->tx_vote);
+	debugfs_create_u64("tx_votes_on", mode, ibs_dir, &qca->tx_votes_on);
+	debugfs_create_u64("tx_votes_off", mode, ibs_dir, &qca->tx_votes_off);
+	debugfs_create_bool("rx_vote", mode, ibs_dir, &qca->rx_vote);
+	debugfs_create_u64("rx_votes_on", mode, ibs_dir, &qca->rx_votes_on);
+	debugfs_create_u64("rx_votes_off", mode, ibs_dir, &qca->rx_votes_off);
+	debugfs_create_u64("votes_on", mode, ibs_dir, &qca->votes_on);
+	debugfs_create_u64("votes_off", mode, ibs_dir, &qca->votes_off);
+	debugfs_create_u32("vote_on_ms", mode, ibs_dir, &qca->vote_on_ms);
+	debugfs_create_u32("vote_off_ms", mode, ibs_dir, &qca->vote_off_ms);
+
+	/* read/write */
+	mode = S_IRUGO | S_IWUSR;
+	debugfs_create_u32("wake_retrans", mode, ibs_dir, &qca->wake_retrans);
+	debugfs_create_u32("tx_idle_delay", mode, ibs_dir,
+			   &qca->tx_idle_delay);
+}
+
+/* Flush protocol data */
+static int qca_flush(struct hci_uart *hu)
+{
+	struct qca_data *qca = hu->priv;
+
+	BT_DBG("hu %p qca flush", hu);
+
+	skb_queue_purge(&qca->tx_wait_q);
+	skb_queue_purge(&qca->txq);
+
+	return 0;
+}
+
+/* Close protocol */
+static int qca_close(struct hci_uart *hu)
+{
+	struct qca_data *qca = hu->priv;
+
+	BT_DBG("hu %p qca close", hu);
+
+	serial_clock_vote(HCI_IBS_VOTE_STATS_UPDATE, hu);
+
+	skb_queue_purge(&qca->tx_wait_q);
+	skb_queue_purge(&qca->txq);
+	del_timer(&qca->tx_idle_timer);
+	del_timer(&qca->wake_retrans_timer);
+	destroy_workqueue(qca->workqueue);
+	qca->hu = NULL;
+
+	kfree_skb(qca->rx_skb);
+
+	hu->priv = NULL;
+
+	kfree(qca);
+
+	return 0;
+}
+
+/* Called upon a wake-up-indication from the device.
+ */
+static void device_want_to_wakeup(struct hci_uart *hu)
+{
+	unsigned long flags;
+	struct qca_data *qca = hu->priv;
+
+	BT_DBG("hu %p want to wake up", hu);
+
+	spin_lock_irqsave(&qca->hci_ibs_lock, flags);
+
+	qca->ibs_recv_wakes++;
+
+	switch (qca->rx_ibs_state) {
+	case HCI_IBS_RX_ASLEEP:
+		/* Make sure clock is on - we may have turned clock off since
+		 * receiving the wake up indicator awake rx clock.
+		 */
+		queue_work(qca->workqueue, &qca->ws_awake_rx);
+		spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
+		return;
+
+	case HCI_IBS_RX_AWAKE:
+		/* Always acknowledge device wake up,
+		 * sending IBS message doesn't count as TX ON.
+		 */
+		if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0) {
+			BT_ERR("Failed to acknowledge device wake up");
+			break;
+		}
+		qca->ibs_sent_wacks++;
+		break;
+
+	default:
+		/* Any other state is illegal */
+		BT_ERR("Received HCI_IBS_WAKE_IND in rx state %d",
+		       qca->rx_ibs_state);
+		break;
+	}
+
+	spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
+
+	/* Actually send the packets */
+	hci_uart_tx_wakeup(hu);
+}
+
+/* Called upon a sleep-indication from the device.
+ */
+static void device_want_to_sleep(struct hci_uart *hu)
+{
+	unsigned long flags;
+	struct qca_data *qca = hu->priv;
+
+	BT_DBG("hu %p want to sleep", hu);
+
+	spin_lock_irqsave(&qca->hci_ibs_lock, flags);
+
+	qca->ibs_recv_slps++;
+
+	switch (qca->rx_ibs_state) {
+	case HCI_IBS_RX_AWAKE:
+		/* Update state */
+		qca->rx_ibs_state = HCI_IBS_RX_ASLEEP;
+		/* Vote off rx clock under workqueue */
+		queue_work(qca->workqueue, &qca->ws_rx_vote_off);
+		break;
+
+	case HCI_IBS_RX_ASLEEP:
+		/* Fall through */
+
+	default:
+		/* Any other state is illegal */
+		BT_ERR("Received HCI_IBS_SLEEP_IND in rx state %d",
+		       qca->rx_ibs_state);
+		break;
+	}
+
+	spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
+}
+
+/* Called upon wake-up-acknowledgement from the device
+ */
+static void device_woke_up(struct hci_uart *hu)
+{
+	unsigned long flags, idle_delay;
+	struct qca_data *qca = hu->priv;
+	struct sk_buff *skb = NULL;
+
+	BT_DBG("hu %p woke up", hu);
+
+	spin_lock_irqsave(&qca->hci_ibs_lock, flags);
+
+	qca->ibs_recv_wacks++;
+
+	switch (qca->tx_ibs_state) {
+	case HCI_IBS_TX_AWAKE:
+		/* Expect one if we send 2 WAKEs */
+		BT_DBG("Received HCI_IBS_WAKE_ACK in tx state %d",
+		       qca->tx_ibs_state);
+		break;
+
+	case HCI_IBS_TX_WAKING:
+		/* Send pending packets */
+		while ((skb = skb_dequeue(&qca->tx_wait_q)))
+			skb_queue_tail(&qca->txq, skb);
+
+		/* Switch timers and change state to HCI_IBS_TX_AWAKE */
+		del_timer(&qca->wake_retrans_timer);
+		idle_delay = msecs_to_jiffies(qca->tx_idle_delay);
+		mod_timer(&qca->tx_idle_timer, jiffies + idle_delay);
+		qca->tx_ibs_state = HCI_IBS_TX_AWAKE;
+		break;
+
+	case HCI_IBS_TX_ASLEEP:
+		/* Fall through */
+
+	default:
+		BT_ERR("Received HCI_IBS_WAKE_ACK in tx state %d",
+		       qca->tx_ibs_state);
+		break;
+	}
+
+	spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
+
+	/* Actually send the packets */
+	hci_uart_tx_wakeup(hu);
+}
+
+/* Enqueue frame for transmittion (padding, crc, etc) may be called from
+ * two simultaneous tasklets.
+ */
+static int qca_enqueue(struct hci_uart *hu, struct sk_buff *skb)
+{
+	unsigned long flags = 0, idle_delay;
+	struct qca_data *qca = hu->priv;
+
+	BT_DBG("hu %p qca enq skb %p tx_ibs_state %d", hu, skb,
+	       qca->tx_ibs_state);
+
+	/* Prepend skb with frame type */
+	memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
+
+	/* Don't go to sleep in middle of patch download or
+	 * Out-Of-Band(GPIOs control) sleep is selected.
+	 */
+	if (!test_bit(STATE_IN_BAND_SLEEP_ENABLED, &qca->flags)) {
+		skb_queue_tail(&qca->txq, skb);
+		return 0;
+	}
+
+	spin_lock_irqsave(&qca->hci_ibs_lock, flags);
+
+	/* Act according to current state */
+	switch (qca->tx_ibs_state) {
+	case HCI_IBS_TX_AWAKE:
+		BT_DBG("Device awake, sending normally");
+		skb_queue_tail(&qca->txq, skb);
+		idle_delay = msecs_to_jiffies(qca->tx_idle_delay);
+		mod_timer(&qca->tx_idle_timer, jiffies + idle_delay);
+		break;
+
+	case HCI_IBS_TX_ASLEEP:
+		BT_DBG("Device asleep, waking up and queueing packet");
+		/* Save packet for later */
+		skb_queue_tail(&qca->tx_wait_q, skb);
+
+		qca->tx_ibs_state = HCI_IBS_TX_WAKING;
+		/* Schedule a work queue to wake up device */
+		queue_work(qca->workqueue, &qca->ws_awake_device);
+		break;
+
+	case HCI_IBS_TX_WAKING:
+		BT_DBG("Device waking up, queueing packet");
+		/* Transient state; just keep packet for later */
+		skb_queue_tail(&qca->tx_wait_q, skb);
+		break;
+
+	default:
+		BT_ERR("Illegal tx state: %d (losing packet)",
+		       qca->tx_ibs_state);
+		kfree_skb(skb);
+		break;
+	}
+
+	spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
+
+	return 0;
+}
+
+static int qca_ibs_sleep_ind(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_uart *hu = hci_get_drvdata(hdev);
+
+	BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_SLEEP_IND);
+
+	device_want_to_sleep(hu);
+
+	kfree_skb(skb);
+	return 0;
+}
+
+static int qca_ibs_wake_ind(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_uart *hu = hci_get_drvdata(hdev);
+
+	BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_IND);
+
+	device_want_to_wakeup(hu);
+
+	kfree_skb(skb);
+	return 0;
+}
+
+static int qca_ibs_wake_ack(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_uart *hu = hci_get_drvdata(hdev);
+
+	BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_ACK);
+
+	device_woke_up(hu);
+
+	kfree_skb(skb);
+	return 0;
+}
+
+#define QCA_IBS_SLEEP_IND_EVENT \
+	.type = HCI_IBS_SLEEP_IND, \
+	.hlen = 0, \
+	.loff = 0, \
+	.lsize = 0, \
+	.maxlen = HCI_MAX_IBS_SIZE
+
+#define QCA_IBS_WAKE_IND_EVENT \
+	.type = HCI_IBS_WAKE_IND, \
+	.hlen = 0, \
+	.loff = 0, \
+	.lsize = 0, \
+	.maxlen = HCI_MAX_IBS_SIZE
+
+#define QCA_IBS_WAKE_ACK_EVENT \
+	.type = HCI_IBS_WAKE_ACK, \
+	.hlen = 0, \
+	.loff = 0, \
+	.lsize = 0, \
+	.maxlen = HCI_MAX_IBS_SIZE
+
+static const struct h4_recv_pkt qca_recv_pkts[] = {
+	{ H4_RECV_ACL,             .recv = hci_recv_frame    },
+	{ H4_RECV_SCO,             .recv = hci_recv_frame    },
+	{ H4_RECV_EVENT,           .recv = hci_recv_frame    },
+	{ QCA_IBS_WAKE_IND_EVENT,  .recv = qca_ibs_wake_ind  },
+	{ QCA_IBS_WAKE_ACK_EVENT,  .recv = qca_ibs_wake_ack  },
+	{ QCA_IBS_SLEEP_IND_EVENT, .recv = qca_ibs_sleep_ind },
+};
+
+static int qca_recv(struct hci_uart *hu, const void *data, int count)
+{
+	struct qca_data *qca = hu->priv;
+
+	if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
+		return -EUNATCH;
+
+	qca->rx_skb = h4_recv_buf(hu->hdev, qca->rx_skb, data, count,
+				  qca_recv_pkts, ARRAY_SIZE(qca_recv_pkts));
+	if (IS_ERR(qca->rx_skb)) {
+		int err = PTR_ERR(qca->rx_skb);
+		BT_ERR("%s: Frame reassembly failed (%d)", hu->hdev->name, err);
+		qca->rx_skb = NULL;
+		return err;
+	}
+
+	return count;
+}
+
+static struct sk_buff *qca_dequeue(struct hci_uart *hu)
+{
+	struct qca_data *qca = hu->priv;
+
+	return skb_dequeue(&qca->txq);
+}
+
+static uint8_t qca_get_baudrate_value(int speed)
+{
+	switch(speed) {
+	case 9600:
+		return QCA_BAUDRATE_9600;
+	case 19200:
+		return QCA_BAUDRATE_19200;
+	case 38400:
+		return QCA_BAUDRATE_38400;
+	case 57600:
+		return QCA_BAUDRATE_57600;
+	case 115200:
+		return QCA_BAUDRATE_115200;
+	case 230400:
+		return QCA_BAUDRATE_230400;
+	case 460800:
+		return QCA_BAUDRATE_460800;
+	case 500000:
+		return QCA_BAUDRATE_500000;
+	case 921600:
+		return QCA_BAUDRATE_921600;
+	case 1000000:
+		return QCA_BAUDRATE_1000000;
+	case 2000000:
+		return QCA_BAUDRATE_2000000;
+	case 3000000:
+		return QCA_BAUDRATE_3000000;
+	case 3500000:
+		return QCA_BAUDRATE_3500000;
+	default:
+		return QCA_BAUDRATE_115200;
+	}
+}
+
+static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate)
+{
+	struct hci_uart *hu = hci_get_drvdata(hdev);
+	struct qca_data *qca = hu->priv;
+	struct sk_buff *skb;
+	u8 cmd[] = { 0x01, 0x48, 0xFC, 0x01, 0x00 };
+
+	if (baudrate > QCA_BAUDRATE_3000000)
+		return -EINVAL;
+
+	cmd[4] = baudrate;
+
+	skb = bt_skb_alloc(sizeof(cmd), GFP_ATOMIC);
+	if (!skb) {
+		BT_ERR("Failed to allocate memory for baudrate packet");
+		return -ENOMEM;
+	}
+
+	/* Assign commands to change baudrate and packet type. */
+	memcpy(skb_put(skb, sizeof(cmd)), cmd, sizeof(cmd));
+	bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
+
+	skb_queue_tail(&qca->txq, skb);
+	hci_uart_tx_wakeup(hu);
+
+	/* wait 300ms to change new baudrate on controller side
+	 * controller will come back after they receive this HCI command
+	 * then host can communicate with new baudrate to controller
+	 */
+	set_current_state(TASK_UNINTERRUPTIBLE);
+	schedule_timeout(msecs_to_jiffies(BAUDRATE_SETTLE_TIMEOUT_MS));
+	set_current_state(TASK_INTERRUPTIBLE);
+
+	return 0;
+}
+
+static int qca_setup(struct hci_uart *hu)
+{
+	struct hci_dev *hdev = hu->hdev;
+	struct qca_data *qca = hu->priv;
+	unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200;
+	int ret;
+
+	BT_INFO("%s: ROME setup", hdev->name);
+
+	/* Patch downloading has to be done without IBS mode */
+	clear_bit(STATE_IN_BAND_SLEEP_ENABLED, &qca->flags);
+
+	/* Setup initial baudrate */
+	speed = 0;
+	if (hu->init_speed)
+		speed = hu->init_speed;
+	else if (hu->proto->init_speed)
+		speed = hu->proto->init_speed;
+
+	if (speed)
+		hci_uart_set_baudrate(hu, speed);
+
+	/* Setup user speed if needed */
+	speed = 0;
+	if (hu->oper_speed)
+		speed = hu->oper_speed;
+	else if (hu->proto->oper_speed)
+		speed = hu->proto->oper_speed;
+
+	if (speed) {
+		qca_baudrate = qca_get_baudrate_value(speed);
+
+		BT_INFO("%s: Set UART speed to %d", hdev->name, speed);
+		ret = qca_set_baudrate(hdev, qca_baudrate);
+		if (ret) {
+			BT_ERR("%s: Failed to change the baud rate (%d)",
+			       hdev->name, ret);
+			return ret;
+		}
+		hci_uart_set_baudrate(hu, speed);
+	}
+
+	/* Setup patch / NVM configurations */
+	ret = qca_uart_setup_rome(hdev, qca_baudrate);
+	if (!ret) {
+		set_bit(STATE_IN_BAND_SLEEP_ENABLED, &qca->flags);
+		qca_debugfs_init(hdev);
+	}
+
+	/* Setup bdaddr */
+	hu->hdev->set_bdaddr = qca_set_bdaddr_rome;
+
+	return ret;
+}
+
+static struct hci_uart_proto qca_proto = {
+	.id		= HCI_UART_QCA,
+	.name		= "QCA",
+	.init_speed	= 115200,
+	.oper_speed	= 3000000,
+	.open		= qca_open,
+	.close		= qca_close,
+	.flush		= qca_flush,
+	.setup		= qca_setup,
+	.recv		= qca_recv,
+	.enqueue	= qca_enqueue,
+	.dequeue	= qca_dequeue,
+};
+
+int __init qca_init(void)
+{
+	return hci_uart_register_proto(&qca_proto);
+}
+
+int __exit qca_deinit(void)
+{
+	return hci_uart_unregister_proto(&qca_proto);
+}