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

Pull networking updates from David Miller:

 1) Add Maglev hashing scheduler to IPVS, from Inju Song.

 2) Lots of new TC subsystem tests from Roman Mashak.

 3) Add TCP zero copy receive and fix delayed acks and autotuning with
    SO_RCVLOWAT, from Eric Dumazet.

 4) Add XDP_REDIRECT support to mlx5 driver, from Jesper Dangaard
    Brouer.

 5) Add ttl inherit support to vxlan, from Hangbin Liu.

 6) Properly separate ipv6 routes into their logically independant
    components. fib6_info for the routing table, and fib6_nh for sets of
    nexthops, which thus can be shared. From David Ahern.

 7) Add bpf_xdp_adjust_tail helper, which can be used to generate ICMP
    messages from XDP programs. From Nikita V. Shirokov.

 8) Lots of long overdue cleanups to the r8169 driver, from Heiner
    Kallweit.

 9) Add BTF ("BPF Type Format"), from Martin KaFai Lau.

10) Add traffic condition monitoring to iwlwifi, from Luca Coelho.

11) Plumb extack down into fib_rules, from Roopa Prabhu.

12) Add Flower classifier offload support to igb, from Vinicius Costa
    Gomes.

13) Add UDP GSO support, from Willem de Bruijn.

14) Add documentation for eBPF helpers, from Quentin Monnet.

15) Add TLS tx offload to mlx5, from Ilya Lesokhin.

16) Allow applications to be given the number of bytes available to read
    on a socket via a control message returned from recvmsg(), from
    Soheil Hassas Yeganeh.

17) Add x86_32 eBPF JIT compiler, from Wang YanQing.

18) Add AF_XDP sockets, with zerocopy support infrastructure as well.
    From Björn Töpel.

19) Remove indirect load support from all of the BPF JITs and handle
    these operations in the verifier by translating them into native BPF
    instead. From Daniel Borkmann.

20) Add GRO support to ipv6 gre tunnels, from Eran Ben Elisha.

21) Allow XDP programs to do lookups in the main kernel routing tables
    for forwarding. From David Ahern.

22) Allow drivers to store hardware state into an ELF section of kernel
    dump vmcore files, and use it in cxgb4. From Rahul Lakkireddy.

23) Various RACK and loss detection improvements in TCP, from Yuchung
    Cheng.

24) Add TCP SACK compression, from Eric Dumazet.

25) Add User Mode Helper support and basic bpfilter infrastructure, from
    Alexei Starovoitov.

26) Support ports and protocol values in RTM_GETROUTE, from Roopa
    Prabhu.

27) Support bulking in ->ndo_xdp_xmit() API, from Jesper Dangaard
    Brouer.

28) Add lots of forwarding selftests, from Petr Machata.

29) Add generic network device failover driver, from Sridhar Samudrala.

* ra.kernel.org:/pub/scm/linux/kernel/git/davem/net-next: (1959 commits)
  strparser: Add __strp_unpause and use it in ktls.
  rxrpc: Fix terminal retransmission connection ID to include the channel
  net: hns3: Optimize PF CMDQ interrupt switching process
  net: hns3: Fix for VF mailbox receiving unknown message
  net: hns3: Fix for VF mailbox cannot receiving PF response
  bnx2x: use the right constant
  Revert "net: sched: cls: Fix offloading when ingress dev is vxlan"
  net: dsa: b53: Fix for brcm tag issue in Cygnus SoC
  enic: fix UDP rss bits
  netdev-FAQ: clarify DaveM's position for stable backports
  rtnetlink: validate attributes in do_setlink()
  mlxsw: Add extack messages for port_{un, }split failures
  netdevsim: Add extack error message for devlink reload
  devlink: Add extack to reload and port_{un, }split operations
  net: metrics: add proper netlink validation
  ipmr: fix error path when ipmr_new_table fails
  ip6mr: only set ip6mr_table from setsockopt when ip6mr_new_table succeeds
  net: hns3: remove unused hclgevf_cfg_func_mta_filter
  netfilter: provide udp*_lib_lookup for nf_tproxy
  qed*: Utilize FW 8.37.2.0
  ...

1 files changed, 115 insertions, 3 deletions

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 05ec530b8a3a..51790dd02afb 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -29,7 +29,12 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/clk.h>
 #include <linux/debugfs.h>
+#include <linux/gpio/consumer.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/serdev.h>
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
@@ -50,6 +55,9 @@
 #define IBS_TX_IDLE_TIMEOUT_MS		2000
 #define BAUDRATE_SETTLE_TIMEOUT_MS	300
 
+/* susclk rate */
+#define SUSCLK_RATE_32KHZ	32768
+
 /* HCI_IBS transmit side sleep protocol states */
 enum tx_ibs_states {
 	HCI_IBS_TX_ASLEEP,
@@ -111,6 +119,12 @@ struct qca_data {
 	u64 votes_off;
 };
 
+struct qca_serdev {
+	struct hci_uart	 serdev_hu;
+	struct gpio_desc *bt_en;
+	struct clk	 *susclk;
+};
+
 static void __serial_clock_on(struct tty_struct *tty)
 {
 	/* TODO: Some chipset requires to enable UART clock on client
@@ -386,6 +400,7 @@ static void hci_ibs_wake_retrans_timeout(struct timer_list *t)
 /* Initialize protocol */
 static int qca_open(struct hci_uart *hu)
 {
+	struct qca_serdev *qcadev;
 	struct qca_data *qca;
 
 	BT_DBG("hu %p qca_open", hu);
@@ -444,6 +459,13 @@ static int qca_open(struct hci_uart *hu)
 	timer_setup(&qca->tx_idle_timer, hci_ibs_tx_idle_timeout, 0);
 	qca->tx_idle_delay = IBS_TX_IDLE_TIMEOUT_MS;
 
+	if (hu->serdev) {
+		serdev_device_open(hu->serdev);
+
+		qcadev = serdev_device_get_drvdata(hu->serdev);
+		gpiod_set_value_cansleep(qcadev->bt_en, 1);
+	}
+
 	BT_DBG("HCI_UART_QCA open, tx_idle_delay=%u, wake_retrans=%u",
 	       qca->tx_idle_delay, qca->wake_retrans);
 
@@ -512,6 +534,7 @@ static int qca_flush(struct hci_uart *hu)
 /* Close protocol */
 static int qca_close(struct hci_uart *hu)
 {
+	struct qca_serdev *qcadev;
 	struct qca_data *qca = hu->priv;
 
 	BT_DBG("hu %p qca close", hu);
@@ -525,6 +548,13 @@ static int qca_close(struct hci_uart *hu)
 	destroy_workqueue(qca->workqueue);
 	qca->hu = NULL;
 
+	if (hu->serdev) {
+		serdev_device_close(hu->serdev);
+
+		qcadev = serdev_device_get_drvdata(hu->serdev);
+		gpiod_set_value_cansleep(qcadev->bt_en, 0);
+	}
+
 	kfree_skb(qca->rx_skb);
 
 	hu->priv = NULL;
@@ -880,11 +910,19 @@ static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate)
 	 */
 	set_current_state(TASK_UNINTERRUPTIBLE);
 	schedule_timeout(msecs_to_jiffies(BAUDRATE_SETTLE_TIMEOUT_MS));
-	set_current_state(TASK_INTERRUPTIBLE);
+	set_current_state(TASK_RUNNING);
 
 	return 0;
 }
 
+static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
+{
+	if (hu->serdev)
+		serdev_device_set_baudrate(hu->serdev, speed);
+	else
+		hci_uart_set_baudrate(hu, speed);
+}
+
 static int qca_setup(struct hci_uart *hu)
 {
 	struct hci_dev *hdev = hu->hdev;
@@ -905,7 +943,7 @@ static int qca_setup(struct hci_uart *hu)
 		speed = hu->proto->init_speed;
 
 	if (speed)
-		hci_uart_set_baudrate(hu, speed);
+		host_set_baudrate(hu, speed);
 
 	/* Setup user speed if needed */
 	speed = 0;
@@ -924,7 +962,7 @@ static int qca_setup(struct hci_uart *hu)
 				   ret);
 			return ret;
 		}
-		hci_uart_set_baudrate(hu, speed);
+		host_set_baudrate(hu, speed);
 	}
 
 	/* Setup patch / NVM configurations */
@@ -935,6 +973,12 @@ static int qca_setup(struct hci_uart *hu)
 	} else if (ret == -ENOENT) {
 		/* No patch/nvm-config found, run with original fw/config */
 		ret = 0;
+	} else if (ret == -EAGAIN) {
+		/*
+		 * Userspace firmware loader will return -EAGAIN in case no
+		 * patch/nvm-config is found, so run with original fw/config.
+		 */
+		ret = 0;
 	}
 
 	/* Setup bdaddr */
@@ -958,12 +1002,80 @@ static struct hci_uart_proto qca_proto = {
 	.dequeue	= qca_dequeue,
 };
 
+static int qca_serdev_probe(struct serdev_device *serdev)
+{
+	struct qca_serdev *qcadev;
+	int err;
+
+	qcadev = devm_kzalloc(&serdev->dev, sizeof(*qcadev), GFP_KERNEL);
+	if (!qcadev)
+		return -ENOMEM;
+
+	qcadev->serdev_hu.serdev = serdev;
+	serdev_device_set_drvdata(serdev, qcadev);
+
+	qcadev->bt_en = devm_gpiod_get(&serdev->dev, "enable",
+				       GPIOD_OUT_LOW);
+	if (IS_ERR(qcadev->bt_en)) {
+		dev_err(&serdev->dev, "failed to acquire enable gpio\n");
+		return PTR_ERR(qcadev->bt_en);
+	}
+
+	qcadev->susclk = devm_clk_get(&serdev->dev, NULL);
+	if (IS_ERR(qcadev->susclk)) {
+		dev_err(&serdev->dev, "failed to acquire clk\n");
+		return PTR_ERR(qcadev->susclk);
+	}
+
+	err = clk_set_rate(qcadev->susclk, SUSCLK_RATE_32KHZ);
+	if (err)
+		return err;
+
+	err = clk_prepare_enable(qcadev->susclk);
+	if (err)
+		return err;
+
+	err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
+	if (err)
+		clk_disable_unprepare(qcadev->susclk);
+
+	return err;
+}
+
+static void qca_serdev_remove(struct serdev_device *serdev)
+{
+	struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
+
+	hci_uart_unregister_device(&qcadev->serdev_hu);
+
+	clk_disable_unprepare(qcadev->susclk);
+}
+
+static const struct of_device_id qca_bluetooth_of_match[] = {
+	{ .compatible = "qcom,qca6174-bt" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, qca_bluetooth_of_match);
+
+static struct serdev_device_driver qca_serdev_driver = {
+	.probe = qca_serdev_probe,
+	.remove = qca_serdev_remove,
+	.driver = {
+		.name = "hci_uart_qca",
+		.of_match_table = qca_bluetooth_of_match,
+	},
+};
+
 int __init qca_init(void)
 {
+	serdev_device_driver_register(&qca_serdev_driver);
+
 	return hci_uart_register_proto(&qca_proto);
 }
 
 int __exit qca_deinit(void)
 {
+	serdev_device_driver_unregister(&qca_serdev_driver);
+
 	return hci_uart_unregister_proto(&qca_proto);
 }