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, 196 insertions, 47 deletions

diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c
index 707c2d1..0438a64 100644
--- a/drivers/bluetooth/hci_bcm.c
+++ b/drivers/bluetooth/hci_bcm.c
@@ -29,6 +29,7 @@
 #include <linux/acpi.h>
 #include <linux/of.h>
 #include <linux/property.h>
+#include <linux/platform_data/x86/apple.h>
 #include <linux/platform_device.h>
 #include <linux/clk.h>
 #include <linux/gpio/consumer.h>
@@ -52,7 +53,37 @@
 
 #define BCM_AUTOSUSPEND_DELAY	5000 /* default autosleep delay */
 
-/* device driver resources */
+/**
+ * struct bcm_device - device driver resources
+ * @serdev_hu: HCI UART controller struct
+ * @list: bcm_device_list node
+ * @dev: physical UART slave
+ * @name: device name logged by bt_dev_*() functions
+ * @device_wakeup: BT_WAKE pin,
+ *	assert = Bluetooth device must wake up or remain awake,
+ *	deassert = Bluetooth device may sleep when sleep criteria are met
+ * @shutdown: BT_REG_ON pin,
+ *	power up or power down Bluetooth device internal regulators
+ * @set_device_wakeup: callback to toggle BT_WAKE pin
+ *	either by accessing @device_wakeup or by calling @btlp
+ * @set_shutdown: callback to toggle BT_REG_ON pin
+ *	either by accessing @shutdown or by calling @btpu/@btpd
+ * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power")
+ * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up")
+ * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down")
+ * @clk: clock used by Bluetooth device
+ * @clk_enabled: whether @clk is prepared and enabled
+ * @init_speed: default baudrate of Bluetooth device;
+ *	the host UART is initially set to this baudrate so that
+ *	it can configure the Bluetooth device for @oper_speed
+ * @oper_speed: preferred baudrate of Bluetooth device;
+ *	set to 0 if @init_speed is already the preferred baudrate
+ * @irq: interrupt triggered by HOST_WAKE_BT pin
+ * @irq_active_low: whether @irq is active low
+ * @hu: pointer to HCI UART controller struct,
+ *	used to disable flow control during runtime suspend and system sleep
+ * @is_suspended: whether flow control is currently disabled
+ */
 struct bcm_device {
 	/* Must be the first member, hci_serdev.c expects this. */
 	struct hci_uart		serdev_hu;
@@ -63,6 +94,11 @@ struct bcm_device {
 	const char		*name;
 	struct gpio_desc	*device_wakeup;
 	struct gpio_desc	*shutdown;
+	int			(*set_device_wakeup)(struct bcm_device *, bool);
+	int			(*set_shutdown)(struct bcm_device *, bool);
+#ifdef CONFIG_ACPI
+	acpi_handle		btlp, btpu, btpd;
+#endif
 
 	struct clk		*clk;
 	bool			clk_enabled;
@@ -74,7 +110,7 @@ struct bcm_device {
 
 #ifdef CONFIG_PM
 	struct hci_uart		*hu;
-	bool			is_suspended; /* suspend/resume flag */
+	bool			is_suspended;
 #endif
 };
 
@@ -170,11 +206,21 @@ static bool bcm_device_exists(struct bcm_device *device)
 
 static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
 {
-	if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled)
-		clk_prepare_enable(dev->clk);
+	int err;
 
-	gpiod_set_value(dev->shutdown, powered);
-	gpiod_set_value(dev->device_wakeup, powered);
+	if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled) {
+		err = clk_prepare_enable(dev->clk);
+		if (err)
+			return err;
+	}
+
+	err = dev->set_shutdown(dev, powered);
+	if (err)
+		goto err_clk_disable;
+
+	err = dev->set_device_wakeup(dev, powered);
+	if (err)
+		goto err_revert_shutdown;
 
 	if (!powered && !IS_ERR(dev->clk) && dev->clk_enabled)
 		clk_disable_unprepare(dev->clk);
@@ -182,6 +228,13 @@ static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
 	dev->clk_enabled = powered;
 
 	return 0;
+
+err_revert_shutdown:
+	dev->set_shutdown(dev, !powered);
+err_clk_disable:
+	if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled)
+		clk_disable_unprepare(dev->clk);
+	return err;
 }
 
 #ifdef CONFIG_PM
@@ -191,9 +244,7 @@ static irqreturn_t bcm_host_wake(int irq, void *data)
 
 	bt_dev_dbg(bdev, "Host wake IRQ");
 
-	pm_runtime_get(bdev->dev);
-	pm_runtime_mark_last_busy(bdev->dev);
-	pm_runtime_put_autosuspend(bdev->dev);
+	pm_request_resume(bdev->dev);
 
 	return IRQ_HANDLED;
 }
@@ -218,8 +269,10 @@ static int bcm_request_irq(struct bcm_data *bcm)
 			       bdev->irq_active_low ? IRQF_TRIGGER_FALLING :
 						      IRQF_TRIGGER_RISING,
 			       "host_wake", bdev);
-	if (err)
+	if (err) {
+		bdev->irq = err;
 		goto unlock;
+	}
 
 	device_init_wakeup(bdev->dev, true);
 
@@ -247,8 +300,8 @@ static const struct bcm_set_sleep_mode default_sleep_params = {
 	/* Irrelevant USB flags */
 	.usb_auto_sleep = 0,
 	.usb_resume_timeout = 0,
+	.break_to_host = 0,
 	.pulsed_host_wake = 0,
-	.break_to_host = 0
 };
 
 static int bcm_setup_sleep(struct hci_uart *hu)
@@ -304,6 +357,7 @@ static int bcm_open(struct hci_uart *hu)
 {
 	struct bcm_data *bcm;
 	struct list_head *p;
+	int err;
 
 	bt_dev_dbg(hu->hdev, "hu %p", hu);
 
@@ -318,7 +372,10 @@ static int bcm_open(struct hci_uart *hu)
 	mutex_lock(&bcm_device_lock);
 
 	if (hu->serdev) {
-		serdev_device_open(hu->serdev);
+		err = serdev_device_open(hu->serdev);
+		if (err)
+			goto err_free;
+
 		bcm->dev = serdev_device_get_drvdata(hu->serdev);
 		goto out;
 	}
@@ -346,17 +403,33 @@ out:
 	if (bcm->dev) {
 		hu->init_speed = bcm->dev->init_speed;
 		hu->oper_speed = bcm->dev->oper_speed;
-		bcm_gpio_set_power(bcm->dev, true);
+		err = bcm_gpio_set_power(bcm->dev, true);
+		if (err)
+			goto err_unset_hu;
 	}
 
 	mutex_unlock(&bcm_device_lock);
 	return 0;
+
+err_unset_hu:
+	if (hu->serdev)
+		serdev_device_close(hu->serdev);
+#ifdef CONFIG_PM
+	else
+		bcm->dev->hu = NULL;
+#endif
+err_free:
+	mutex_unlock(&bcm_device_lock);
+	hu->priv = NULL;
+	kfree(bcm);
+	return err;
 }
 
 static int bcm_close(struct hci_uart *hu)
 {
 	struct bcm_data *bcm = hu->priv;
 	struct bcm_device *bdev = NULL;
+	int err;
 
 	bt_dev_dbg(hu->hdev, "hu %p", hu);
 
@@ -374,16 +447,17 @@ static int bcm_close(struct hci_uart *hu)
 	}
 
 	if (bdev) {
-		bcm_gpio_set_power(bdev, false);
-#ifdef CONFIG_PM
-		pm_runtime_disable(bdev->dev);
-		pm_runtime_set_suspended(bdev->dev);
-
-		if (device_can_wakeup(bdev->dev)) {
+		if (IS_ENABLED(CONFIG_PM) && bdev->irq > 0) {
 			devm_free_irq(bdev->dev, bdev->irq, bdev);
 			device_init_wakeup(bdev->dev, false);
+			pm_runtime_disable(bdev->dev);
 		}
-#endif
+
+		err = bcm_gpio_set_power(bdev, false);
+		if (err)
+			bt_dev_err(hu->hdev, "Failed to power down");
+		else
+			pm_runtime_set_suspended(bdev->dev);
 	}
 	mutex_unlock(&bcm_device_lock);
 
@@ -512,11 +586,8 @@ static int bcm_recv(struct hci_uart *hu, const void *data, int count)
 	} else if (!bcm->rx_skb) {
 		/* Delay auto-suspend when receiving completed packet */
 		mutex_lock(&bcm_device_lock);
-		if (bcm->dev && bcm_device_exists(bcm->dev)) {
-			pm_runtime_get(bcm->dev->dev);
-			pm_runtime_mark_last_busy(bcm->dev->dev);
-			pm_runtime_put_autosuspend(bcm->dev->dev);
-		}
+		if (bcm->dev && bcm_device_exists(bcm->dev))
+			pm_request_resume(bcm->dev->dev);
 		mutex_unlock(&bcm_device_lock);
 	}
 
@@ -566,6 +637,7 @@ static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
 static int bcm_suspend_device(struct device *dev)
 {
 	struct bcm_device *bdev = dev_get_drvdata(dev);
+	int err;
 
 	bt_dev_dbg(bdev, "");
 
@@ -577,27 +649,37 @@ static int bcm_suspend_device(struct device *dev)
 	}
 
 	/* Suspend the device */
-	if (bdev->device_wakeup) {
-		gpiod_set_value(bdev->device_wakeup, false);
-		bt_dev_dbg(bdev, "suspend, delaying 15 ms");
-		mdelay(15);
+	err = bdev->set_device_wakeup(bdev, false);
+	if (err) {
+		if (bdev->is_suspended && bdev->hu) {
+			bdev->is_suspended = false;
+			hci_uart_set_flow_control(bdev->hu, false);
+		}
+		return -EBUSY;
 	}
 
+	bt_dev_dbg(bdev, "suspend, delaying 15 ms");
+	msleep(15);
+
 	return 0;
 }
 
 static int bcm_resume_device(struct device *dev)
 {
 	struct bcm_device *bdev = dev_get_drvdata(dev);
+	int err;
 
 	bt_dev_dbg(bdev, "");
 
-	if (bdev->device_wakeup) {
-		gpiod_set_value(bdev->device_wakeup, true);
-		bt_dev_dbg(bdev, "resume, delaying 15 ms");
-		mdelay(15);
+	err = bdev->set_device_wakeup(bdev, true);
+	if (err) {
+		dev_err(dev, "Failed to power up\n");
+		return err;
 	}
 
+	bt_dev_dbg(bdev, "resume, delaying 15 ms");
+	msleep(15);
+
 	/* When this executes, the device has woken up already */
 	if (bdev->is_suspended && bdev->hu) {
 		bdev->is_suspended = false;
@@ -632,7 +714,7 @@ static int bcm_suspend(struct device *dev)
 	if (pm_runtime_active(dev))
 		bcm_suspend_device(dev);
 
-	if (device_may_wakeup(dev)) {
+	if (device_may_wakeup(dev) && bdev->irq > 0) {
 		error = enable_irq_wake(bdev->irq);
 		if (!error)
 			bt_dev_dbg(bdev, "BCM irq: enabled");
@@ -648,6 +730,7 @@ unlock:
 static int bcm_resume(struct device *dev)
 {
 	struct bcm_device *bdev = dev_get_drvdata(dev);
+	int err = 0;
 
 	bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
 
@@ -662,19 +745,21 @@ static int bcm_resume(struct device *dev)
 	if (!bdev->hu)
 		goto unlock;
 
-	if (device_may_wakeup(dev)) {
+	if (device_may_wakeup(dev) && bdev->irq > 0) {
 		disable_irq_wake(bdev->irq);
 		bt_dev_dbg(bdev, "BCM irq: disabled");
 	}
 
-	bcm_resume_device(dev);
+	err = bcm_resume_device(dev);
 
 unlock:
 	mutex_unlock(&bcm_device_lock);
 
-	pm_runtime_disable(dev);
-	pm_runtime_set_active(dev);
-	pm_runtime_enable(dev);
+	if (!err) {
+		pm_runtime_disable(dev);
+		pm_runtime_set_active(dev);
+		pm_runtime_enable(dev);
+	}
 
 	return 0;
 }
@@ -771,25 +856,84 @@ static int bcm_resource(struct acpi_resource *ares, void *data)
 
 	return 0;
 }
+
+static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake)
+{
+	if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake)))
+		return -EIO;
+
+	return 0;
+}
+
+static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered)
+{
+	if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd,
+					      NULL, NULL, NULL)))
+		return -EIO;
+
+	return 0;
+}
+
+static int bcm_apple_get_resources(struct bcm_device *dev)
+{
+	struct acpi_device *adev = ACPI_COMPANION(dev->dev);
+	const union acpi_object *obj;
+
+	if (!adev ||
+	    ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) ||
+	    ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) ||
+	    ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd)))
+		return -ENODEV;
+
+	if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) &&
+	    obj->buffer.length == 8)
+		dev->init_speed = *(u64 *)obj->buffer.pointer;
+
+	dev->set_device_wakeup = bcm_apple_set_device_wakeup;
+	dev->set_shutdown = bcm_apple_set_shutdown;
+
+	return 0;
+}
+#else
+static inline int bcm_apple_get_resources(struct bcm_device *dev)
+{
+	return -EOPNOTSUPP;
+}
 #endif /* CONFIG_ACPI */
 
+static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake)
+{
+	gpiod_set_value(dev->device_wakeup, awake);
+	return 0;
+}
+
+static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered)
+{
+	gpiod_set_value(dev->shutdown, powered);
+	return 0;
+}
+
 static int bcm_get_resources(struct bcm_device *dev)
 {
 	dev->name = dev_name(dev->dev);
 
+	if (x86_apple_machine && !bcm_apple_get_resources(dev))
+		return 0;
+
 	dev->clk = devm_clk_get(dev->dev, NULL);
 
-	dev->device_wakeup = devm_gpiod_get_optional(dev->dev,
-						     "device-wakeup",
-						     GPIOD_OUT_LOW);
+	dev->device_wakeup = devm_gpiod_get(dev->dev, "device-wakeup",
+					    GPIOD_OUT_LOW);
 	if (IS_ERR(dev->device_wakeup))
 		return PTR_ERR(dev->device_wakeup);
 
-	dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown",
-						GPIOD_OUT_LOW);
+	dev->shutdown = devm_gpiod_get(dev->dev, "shutdown", GPIOD_OUT_LOW);
 	if (IS_ERR(dev->shutdown))
 		return PTR_ERR(dev->shutdown);
 
+	dev->set_device_wakeup = bcm_gpio_set_device_wakeup;
+	dev->set_shutdown = bcm_gpio_set_shutdown;
+
 	/* IRQ can be declared in ACPI table as Interrupt or GpioInt */
 	if (dev->irq <= 0) {
 		struct gpio_desc *gpio;
@@ -802,7 +946,7 @@ static int bcm_get_resources(struct bcm_device *dev)
 		dev->irq = gpiod_to_irq(gpio);
 	}
 
-	dev_info(dev->dev, "BCM irq: %d\n", dev->irq);
+	dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq);
 	return 0;
 }
 
@@ -892,7 +1036,9 @@ static int bcm_probe(struct platform_device *pdev)
 	list_add_tail(&dev->list, &bcm_device_list);
 	mutex_unlock(&bcm_device_lock);
 
-	bcm_gpio_set_power(dev, false);
+	ret = bcm_gpio_set_power(dev, false);
+	if (ret)
+		dev_err(&pdev->dev, "Failed to power down\n");
 
 	return 0;
 }
@@ -939,6 +1085,7 @@ static const struct acpi_device_id bcm_acpi_match[] = {
 	{ "BCM2E65", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
 	{ "BCM2E67", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
 	{ "BCM2E71", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
+	{ "BCM2E72", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
 	{ "BCM2E7B", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
 	{ "BCM2E7C", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
 	{ "BCM2E7E", (kernel_ulong_t)&acpi_bcm_int_first_gpios },
@@ -993,7 +1140,9 @@ static int bcm_serdev_probe(struct serdev_device *serdev)
 	if (err)
 		return err;
 
-	bcm_gpio_set_power(bcmdev, false);
+	err = bcm_gpio_set_power(bcmdev, false);
+	if (err)
+		dev_err(&serdev->dev, "Failed to power down\n");
 
 	return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto);
 }