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Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next 

Johan Hedberg says:

====================
pull request: bluetooth-next 2015-09-18

Here's the first bluetooth-next pull request for the 4.4 kernel:

 - ieee802154 cleanups & fixes
 - debugfs support for the at86rf230 driver
 - Support for quirky (seemingly counterfeit) CSR Bluetooth controllers
 - Power management and device config improvements for Intel controllers
 - Fix for devices with incorrect advertising data length
 - Fix for closing HCI user channel socket

Please let me know if there are any issues pulling. Thanks.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2015-09-21 16:00:44 -07:00
parent a1ef48e1e8 6818375e97
commit 5dcd246107
31 changed files with 1604 additions and 551 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
Documentation/networking/ieee802154.txt
View File

@ -7,11 +7,11 @@ Introduction
The IEEE 802.15.4 working group focuses on standardization of bottom
two layers: Medium Access Control (MAC) and Physical (PHY). And there
are mainly two options available for upper layers:
- ZigBee - proprietary protocol from ZigBee Alliance
- 6LowPAN - IPv6 networking over low rate personal area networks
- ZigBee - proprietary protocol from the ZigBee Alliance
- 6LoWPAN - IPv6 networking over low rate personal area networks
The Linux-ZigBee project goal is to provide complete implementation
of IEEE 802.15.4 and 6LoWPAN protocols. IEEE 802.15.4 is a stack
The linux-wpan project goal is to provide a complete implementation
of the IEEE 802.15.4 and 6LoWPAN protocols. IEEE 802.15.4 is a stack
of protocols for organizing Low-Rate Wireless Personal Area Networks.
The stack is composed of three main parts:

12
drivers/bluetooth/bt3c_cs.c
View File

@ -453,7 +453,8 @@ static int bt3c_load_firmware(struct bt3c_info *info,
{
char *ptr = (char *) firmware;
char b[9];
unsigned int iobase, size, addr, fcs, tmp;
unsigned int iobase, tmp;
unsigned long size, addr, fcs;
int i, err = 0;
iobase = info->p_dev->resource[0]->start;
@ -478,15 +479,18 @@ static int bt3c_load_firmware(struct bt3c_info *info,
memset(b, 0, sizeof(b));
memcpy(b, ptr + 2, 2);
size = simple_strtoul(b, NULL, 16);
if (kstrtoul(b, 16, &size) < 0)
return -EINVAL;
memset(b, 0, sizeof(b));
memcpy(b, ptr + 4, 8);
addr = simple_strtoul(b, NULL, 16);
if (kstrtoul(b, 16, &addr) < 0)
return -EINVAL;
memset(b, 0, sizeof(b));
memcpy(b, ptr + (size * 2) + 2, 2);
fcs = simple_strtoul(b, NULL, 16);
if (kstrtoul(b, 16, &fcs) < 0)
return -EINVAL;
memset(b, 0, sizeof(b));
for (tmp = 0, i = 0; i < size; i++) {

46
drivers/bluetooth/btintel.c
View File

@ -22,6 +22,7 @@
*/
#include <linux/module.h>
#include <linux/firmware.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
@ -169,6 +170,51 @@ int btintel_secure_send(struct hci_dev *hdev, u8 fragment_type, u32 plen,
}
EXPORT_SYMBOL_GPL(btintel_secure_send);
int btintel_load_ddc_config(struct hci_dev *hdev, const char *ddc_name)
{
const struct firmware *fw;
struct sk_buff *skb;
const u8 *fw_ptr;
int err;
err = request_firmware_direct(&fw, ddc_name, &hdev->dev);
if (err < 0) {
bt_dev_err(hdev, "Failed to load Intel DDC file %s (%d)",
ddc_name, err);
return err;
}
bt_dev_info(hdev, "Found Intel DDC parameters: %s", ddc_name);
fw_ptr = fw->data;
/* DDC file contains one or more DDC structure which has
* Length (1 byte), DDC ID (2 bytes), and DDC value (Length - 2).
*/
while (fw->size > fw_ptr - fw->data) {
u8 cmd_plen = fw_ptr[0] + sizeof(u8);
skb = __hci_cmd_sync(hdev, 0xfc8b, cmd_plen, fw_ptr,
HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
bt_dev_err(hdev, "Failed to send Intel_Write_DDC (%ld)",
PTR_ERR(skb));
release_firmware(fw);
return PTR_ERR(skb);
}
fw_ptr += cmd_plen;
kfree_skb(skb);
}
release_firmware(fw);
bt_dev_info(hdev, "Applying Intel DDC parameters completed");
return 0;
}
EXPORT_SYMBOL_GPL(btintel_load_ddc_config);
MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
MODULE_DESCRIPTION("Bluetooth support for Intel devices ver " VERSION);
MODULE_VERSION(VERSION);

10
drivers/bluetooth/btintel.h
View File

@ -78,6 +78,7 @@ void btintel_hw_error(struct hci_dev *hdev, u8 code);
void btintel_version_info(struct hci_dev *hdev, struct intel_version *ver);
int btintel_secure_send(struct hci_dev *hdev, u8 fragment_type, u32 plen,
const void *param);
int btintel_load_ddc_config(struct hci_dev *hdev, const char *ddc_name);
#else
@ -95,7 +96,8 @@ static inline void btintel_hw_error(struct hci_dev *hdev, u8 code)
{
}
static void btintel_version_info(struct hci_dev *hdev, struct intel_version *ver)
static inline void btintel_version_info(struct hci_dev *hdev,
struct intel_version *ver)
{
}
@ -105,4 +107,10 @@ static inline int btintel_secure_send(struct hci_dev *hdev, u8 fragment_type,
return -EOPNOTSUPP;
}
static inline int btintel_load_ddc_config(struct hci_dev *hdev,
const char *ddc_name)
{
return -EOPNOTSUPP;
}
#endif

14
drivers/bluetooth/btmrvl_main.c
View File

@ -377,20 +377,6 @@ static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb)
return -EINVAL;
}
if (skb_headroom(skb) < BTM_HEADER_LEN) {
struct sk_buff *tmp = skb;
skb = skb_realloc_headroom(skb, BTM_HEADER_LEN);
if (!skb) {
BT_ERR("Tx Error: realloc_headroom failed %d",
BTM_HEADER_LEN);
skb = tmp;
return -EINVAL;
}
kfree_skb(tmp);
}
skb_push(skb, BTM_HEADER_LEN);
/* header type: byte[3]

51
drivers/bluetooth/btusb.c
View File

@ -1277,6 +1277,20 @@ static void btusb_work(struct work_struct *work)
clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
usb_kill_anchored_urbs(&data->isoc_anchor);
/* When isochronous alternate setting needs to be
* changed, because SCO connection has been added
* or removed, a packet fragment may be left in the
* reassembling state. This could lead to wrongly
* assembled fragments.
*
* Clear outstanding fragment when selecting a new
* alternate setting.
*/
spin_lock(&data->rxlock);
kfree_skb(data->sco_skb);
data->sco_skb = NULL;
spin_unlock(&data->rxlock);
if (__set_isoc_interface(hdev, new_alts) < 0)
return;
}
@ -1348,7 +1362,9 @@ static int btusb_setup_csr(struct hci_dev *hdev)
rp = (struct hci_rp_read_local_version *)skb->data;
if (le16_to_cpu(rp->manufacturer) != 10) {
/* Detect controllers which aren't real CSR ones. */
if (le16_to_cpu(rp->manufacturer) != 10 ||
le16_to_cpu(rp->lmp_subver) == 0x0c5c) {
/* Clear the reset quirk since this is not an actual
* early Bluetooth 1.1 device from CSR.
*/
@ -2217,36 +2233,7 @@ done:
* The device can work without DDC parameters, so even if it fails
* to load the file, no need to fail the setup.
*/
err = request_firmware_direct(&fw, fwname, &hdev->dev);
if (err < 0)
return 0;
BT_INFO("%s: Found Intel DDC parameters: %s", hdev->name, fwname);
fw_ptr = fw->data;
/* DDC file contains one or more DDC structure which has
* Length (1 byte), DDC ID (2 bytes), and DDC value (Length - 2).
*/
while (fw->size > fw_ptr - fw->data) {
u8 cmd_plen = fw_ptr[0] + sizeof(u8);
skb = __hci_cmd_sync(hdev, 0xfc8b, cmd_plen, fw_ptr,
HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
BT_ERR("%s: Failed to send Intel_Write_DDC (%ld)",
hdev->name, PTR_ERR(skb));
release_firmware(fw);
return PTR_ERR(skb);
}
fw_ptr += cmd_plen;
kfree_skb(skb);
}
release_firmware(fw);
BT_INFO("%s: Applying Intel DDC parameters completed", hdev->name);
btintel_load_ddc_config(hdev, fwname);
return 0;
}
@ -2782,7 +2769,7 @@ static int btusb_probe(struct usb_interface *intf,
set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
/* Fake CSR devices with broken commands */
if (bcdDevice <= 0x100)
if (bcdDevice <= 0x100 || bcdDevice == 0x134)
hdev->setup = btusb_setup_csr;
set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);

218
drivers/bluetooth/hci_bcm.c
View File

@ -31,6 +31,7 @@
#include <linux/clk.h>
#include <linux/gpio/consumer.h>
#include <linux/tty.h>
#include <linux/interrupt.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
@ -51,6 +52,8 @@ struct bcm_device {
bool clk_enabled;
u32 init_speed;
int irq;
u8 irq_polarity;
#ifdef CONFIG_PM_SLEEP
struct hci_uart *hu;
@ -66,7 +69,7 @@ struct bcm_data {
};
/* List of BCM BT UART devices */
static DEFINE_SPINLOCK(bcm_device_lock);
static DEFINE_MUTEX(bcm_device_lock);
static LIST_HEAD(bcm_device_list);
static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
@ -80,7 +83,7 @@ static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
clock.type = BCM_UART_CLOCK_48MHZ;
BT_DBG("%s: Set Controller clock (%d)", hdev->name, clock.type);
bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type);
/* This Broadcom specific command changes the UART's controller
* clock for baud rate > 3000000.
@ -88,15 +91,15 @@ static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
int err = PTR_ERR(skb);
BT_ERR("%s: BCM: failed to write clock command (%d)",
hdev->name, err);
bt_dev_err(hdev, "BCM: failed to write clock (%d)",
err);
return err;
}
kfree_skb(skb);
}
BT_DBG("%s: Set Controller UART speed to %d bit/s", hdev->name, speed);
bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed);
param.zero = cpu_to_le16(0);
param.baud_rate = cpu_to_le32(speed);
@ -108,8 +111,8 @@ static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
int err = PTR_ERR(skb);
BT_ERR("%s: BCM: failed to write update baudrate command (%d)",
hdev->name, err);
bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)",
err);
return err;
}
@ -149,12 +152,92 @@ static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
return 0;
}
#ifdef CONFIG_PM_SLEEP
static irqreturn_t bcm_host_wake(int irq, void *data)
{
struct bcm_device *bdev = data;
bt_dev_dbg(bdev, "Host wake IRQ");
return IRQ_HANDLED;
}
static int bcm_request_irq(struct bcm_data *bcm)
{
struct bcm_device *bdev = bcm->dev;
int err = 0;
/* If this is not a platform device, do not enable PM functionalities */
mutex_lock(&bcm_device_lock);
if (!bcm_device_exists(bdev)) {
err = -ENODEV;
goto unlock;
}
if (bdev->irq > 0) {
err = devm_request_irq(&bdev->pdev->dev, bdev->irq,
bcm_host_wake, IRQF_TRIGGER_RISING,
"host_wake", bdev);
if (err)
goto unlock;
device_init_wakeup(&bdev->pdev->dev, true);
}
unlock:
mutex_unlock(&bcm_device_lock);
return err;
}
static const struct bcm_set_sleep_mode default_sleep_params = {
.sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */
.idle_host = 2, /* idle threshold HOST, in 300ms */
.idle_dev = 2, /* idle threshold device, in 300ms */
.bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */
.host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */
.allow_host_sleep = 1, /* Allow host sleep in SCO flag */
.combine_modes = 0, /* Combine sleep and LPM flag */
.tristate_control = 0, /* Allow tri-state control of UART tx flag */
/* Irrelevant USB flags */
.usb_auto_sleep = 0,
.usb_resume_timeout = 0,
.pulsed_host_wake = 0,
.break_to_host = 0
};
static int bcm_setup_sleep(struct hci_uart *hu)
{
struct bcm_data *bcm = hu->priv;
struct sk_buff *skb;
struct bcm_set_sleep_mode sleep_params = default_sleep_params;
sleep_params.host_wake_active = !bcm->dev->irq_polarity;
skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params),
&sleep_params, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
int err = PTR_ERR(skb);
bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err);
return err;
}
kfree_skb(skb);
bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded");
return 0;
}
#else
static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; }
static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; }
#endif
static int bcm_open(struct hci_uart *hu)
{
struct bcm_data *bcm;
struct list_head *p;
BT_DBG("hu %p", hu);
bt_dev_dbg(hu->hdev, "hu %p", hu);
bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
if (!bcm)
@ -164,7 +247,7 @@ static int bcm_open(struct hci_uart *hu)
hu->priv = bcm;
spin_lock(&bcm_device_lock);
mutex_lock(&bcm_device_lock);
list_for_each(p, &bcm_device_list) {
struct bcm_device *dev = list_entry(p, struct bcm_device, list);
@ -178,14 +261,12 @@ static int bcm_open(struct hci_uart *hu)
#ifdef CONFIG_PM_SLEEP
dev->hu = hu;
#endif
bcm_gpio_set_power(bcm->dev, true);
break;
}
}
if (bcm->dev)
bcm_gpio_set_power(bcm->dev, true);
spin_unlock(&bcm_device_lock);
mutex_unlock(&bcm_device_lock);
return 0;
}
@ -193,18 +274,24 @@ static int bcm_open(struct hci_uart *hu)
static int bcm_close(struct hci_uart *hu)
{
struct bcm_data *bcm = hu->priv;
struct bcm_device *bdev = bcm->dev;
BT_DBG("hu %p", hu);
bt_dev_dbg(hu->hdev, "hu %p", hu);
/* Protect bcm->dev against removal of the device or driver */
spin_lock(&bcm_device_lock);
if (bcm_device_exists(bcm->dev)) {
bcm_gpio_set_power(bcm->dev, false);
mutex_lock(&bcm_device_lock);
if (bcm_device_exists(bdev)) {
bcm_gpio_set_power(bdev, false);
#ifdef CONFIG_PM_SLEEP
bcm->dev->hu = NULL;
if (device_can_wakeup(&bdev->pdev->dev)) {
devm_free_irq(&bdev->pdev->dev, bdev->irq, bdev);
device_init_wakeup(&bdev->pdev->dev, false);
}
bdev->hu = NULL;
#endif
}
spin_unlock(&bcm_device_lock);
mutex_unlock(&bcm_device_lock);
skb_queue_purge(&bcm->txq);
kfree_skb(bcm->rx_skb);
@ -218,7 +305,7 @@ static int bcm_flush(struct hci_uart *hu)
{
struct bcm_data *bcm = hu->priv;
BT_DBG("hu %p", hu);
bt_dev_dbg(hu->hdev, "hu %p", hu);
skb_queue_purge(&bcm->txq);
@ -227,12 +314,13 @@ static int bcm_flush(struct hci_uart *hu)
static int bcm_setup(struct hci_uart *hu)
{
struct bcm_data *bcm = hu->priv;
char fw_name[64];
const struct firmware *fw;
unsigned int speed;
int err;
BT_DBG("hu %p", hu);
bt_dev_dbg(hu->hdev, "hu %p", hu);
hu->hdev->set_bdaddr = btbcm_set_bdaddr;
@ -242,13 +330,13 @@ static int bcm_setup(struct hci_uart *hu)
err = request_firmware(&fw, fw_name, &hu->hdev->dev);
if (err < 0) {
BT_INFO("%s: BCM: Patch %s not found", hu->hdev->name, fw_name);
bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name);
return 0;
}
err = btbcm_patchram(hu->hdev, fw);
if (err) {
BT_INFO("%s: BCM: Patch failed (%d)", hu->hdev->name, err);
bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err);
goto finalize;
}
@ -281,6 +369,12 @@ finalize:
release_firmware(fw);
err = btbcm_finalize(hu->hdev);
if (err)
return err;
err = bcm_request_irq(bcm);
if (!err)
err = bcm_setup_sleep(hu);
return err;
}
@ -302,7 +396,7 @@ static int bcm_recv(struct hci_uart *hu, const void *data, int count)
bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
if (IS_ERR(bcm->rx_skb)) {
int err = PTR_ERR(bcm->rx_skb);
BT_ERR("%s: Frame reassembly failed (%d)", hu->hdev->name, err);
bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
bcm->rx_skb = NULL;
return err;
}
@ -314,7 +408,7 @@ static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
{
struct bcm_data *bcm = hu->priv;
BT_DBG("hu %p skb %p", hu, skb);
bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb);
/* Prepend skb with frame type */
memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
@ -335,10 +429,11 @@ static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
static int bcm_suspend(struct device *dev)
{
struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
int error;
BT_DBG("suspend (%p): is_suspended %d", bdev, bdev->is_suspended);
bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);
spin_lock(&bcm_device_lock);
mutex_lock(&bcm_device_lock);
if (!bdev->hu)
goto unlock;
@ -353,12 +448,18 @@ static int bcm_suspend(struct device *dev)
/* Suspend the device */
if (bdev->device_wakeup) {
gpiod_set_value(bdev->device_wakeup, false);
BT_DBG("suspend, delaying 15 ms");
bt_dev_dbg(bdev, "suspend, delaying 15 ms");
mdelay(15);
}
if (device_may_wakeup(&bdev->pdev->dev)) {
error = enable_irq_wake(bdev->irq);
if (!error)
bt_dev_dbg(bdev, "BCM irq: enabled");
}
unlock:
spin_unlock(&bcm_device_lock);
mutex_unlock(&bcm_device_lock);
return 0;
}
@ -368,16 +469,21 @@ static int bcm_resume(struct device *dev)
{
struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
BT_DBG("resume (%p): is_suspended %d", bdev, bdev->is_suspended);
bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
spin_lock(&bcm_device_lock);
mutex_lock(&bcm_device_lock);
if (!bdev->hu)
goto unlock;
if (device_may_wakeup(&bdev->pdev->dev)) {
disable_irq_wake(bdev->irq);
bt_dev_dbg(bdev, "BCM irq: disabled");
}
if (bdev->device_wakeup) {
gpiod_set_value(bdev->device_wakeup, true);
BT_DBG("resume, delaying 15 ms");
bt_dev_dbg(bdev, "resume, delaying 15 ms");
mdelay(15);
}
@ -389,7 +495,7 @@ static int bcm_resume(struct device *dev)
}
unlock:
spin_unlock(&bcm_device_lock);
mutex_unlock(&bcm_device_lock);
return 0;
}
@ -397,10 +503,12 @@ unlock:
static const struct acpi_gpio_params device_wakeup_gpios = { 0, 0, false };
static const struct acpi_gpio_params shutdown_gpios = { 1, 0, false };
static const struct acpi_gpio_params host_wakeup_gpios = { 2, 0, false };
static const struct acpi_gpio_mapping acpi_bcm_default_gpios[] = {
{ "device-wakeup-gpios", &device_wakeup_gpios, 1 },
{ "shutdown-gpios", &shutdown_gpios, 1 },
{ "host-wakeup-gpios", &host_wakeup_gpios, 1 },
{ },
};
@ -408,13 +516,30 @@ static const struct acpi_gpio_mapping acpi_bcm_default_gpios[] = {
static int bcm_resource(struct acpi_resource *ares, void *data)
{
struct bcm_device *dev = data;
struct acpi_resource_extended_irq *irq;
struct acpi_resource_gpio *gpio;
struct acpi_resource_uart_serialbus *sb;
if (ares->type == ACPI_RESOURCE_TYPE_SERIAL_BUS) {
struct acpi_resource_uart_serialbus *sb;
switch (ares->type) {
case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
irq = &ares->data.extended_irq;
dev->irq_polarity = irq->polarity;
break;
case ACPI_RESOURCE_TYPE_GPIO:
gpio = &ares->data.gpio;
if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT)
dev->irq_polarity = gpio->polarity;
break;
case ACPI_RESOURCE_TYPE_SERIAL_BUS:
sb = &ares->data.uart_serial_bus;
if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART)
dev->init_speed = sb->default_baud_rate;
break;
default:
break;
}
/* Always tell the ACPI core to skip this resource */
@ -453,6 +578,21 @@ static int bcm_acpi_probe(struct bcm_device *dev)
if (IS_ERR(dev->shutdown))
return PTR_ERR(dev->shutdown);
/* IRQ can be declared in ACPI table as Interrupt or GpioInt */
dev->irq = platform_get_irq(pdev, 0);
if (dev->irq <= 0) {
struct gpio_desc *gpio;
gpio = devm_gpiod_get_optional(&pdev->dev, "host-wakeup",
GPIOD_IN);
if (IS_ERR(gpio))
return PTR_ERR(gpio);
dev->irq = gpiod_to_irq(gpio);
}
dev_info(&pdev->dev, "BCM irq: %d\n", dev->irq);
/* Make sure at-least one of the GPIO is defined and that
* a name is specified for this instance
*/
@ -504,9 +644,9 @@ static int bcm_probe(struct platform_device *pdev)
dev_info(&pdev->dev, "%s device registered.\n", dev->name);
/* Place this instance on the device list */
spin_lock(&bcm_device_lock);
mutex_lock(&bcm_device_lock);
list_add_tail(&dev->list, &bcm_device_list);
spin_unlock(&bcm_device_lock);
mutex_unlock(&bcm_device_lock);
bcm_gpio_set_power(dev, false);
@ -517,9 +657,9 @@ static int bcm_remove(struct platform_device *pdev)
{
struct bcm_device *dev = platform_get_drvdata(pdev);
spin_lock(&bcm_device_lock);
mutex_lock(&bcm_device_lock);
list_del(&dev->list);
spin_unlock(&bcm_device_lock);
mutex_unlock(&bcm_device_lock);
acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pdev->dev));

590
drivers/bluetooth/hci_intel.c
View File

@ -31,6 +31,8 @@
#include <linux/platform_device.h>
#include <linux/gpio/consumer.h>
#include <linux/acpi.h>
#include <linux/interrupt.h>
#include <linux/pm_runtime.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
@ -43,19 +45,45 @@
#define STATE_FIRMWARE_LOADED 2
#define STATE_FIRMWARE_FAILED 3
#define STATE_BOOTING 4
#define STATE_LPM_ENABLED 5
#define STATE_TX_ACTIVE 6
#define STATE_SUSPENDED 7
#define STATE_LPM_TRANSACTION 8
#define HCI_LPM_WAKE_PKT 0xf0
#define HCI_LPM_PKT 0xf1
#define HCI_LPM_MAX_SIZE 10
#define HCI_LPM_HDR_SIZE HCI_EVENT_HDR_SIZE
#define LPM_OP_TX_NOTIFY 0x00
#define LPM_OP_SUSPEND_ACK 0x02
#define LPM_OP_RESUME_ACK 0x03
#define LPM_SUSPEND_DELAY_MS 1000
struct hci_lpm_pkt {
__u8 opcode;
__u8 dlen;
__u8 data[0];
} __packed;
struct intel_device {
struct list_head list;
struct platform_device *pdev;
struct gpio_desc *reset;
struct hci_uart *hu;
struct mutex hu_lock;
int irq;
};
static LIST_HEAD(intel_device_list);
static DEFINE_SPINLOCK(intel_device_list_lock);
static DEFINE_MUTEX(intel_device_list_lock);
struct intel_data {
struct sk_buff *rx_skb;
struct sk_buff_head txq;
struct work_struct busy_work;
struct hci_uart *hu;
unsigned long flags;
};
@ -101,24 +129,185 @@ static int intel_wait_booting(struct hci_uart *hu)
msecs_to_jiffies(1000));
if (err == 1) {
BT_ERR("%s: Device boot interrupted", hu->hdev->name);
bt_dev_err(hu->hdev, "Device boot interrupted");
return -EINTR;
}
if (err) {
BT_ERR("%s: Device boot timeout", hu->hdev->name);
bt_dev_err(hu->hdev, "Device boot timeout");
return -ETIMEDOUT;
}
return err;
}
#ifdef CONFIG_PM
static int intel_wait_lpm_transaction(struct hci_uart *hu)
{
struct intel_data *intel = hu->priv;
int err;
err = wait_on_bit_timeout(&intel->flags, STATE_LPM_TRANSACTION,
TASK_INTERRUPTIBLE,
msecs_to_jiffies(1000));
if (err == 1) {
bt_dev_err(hu->hdev, "LPM transaction interrupted");
return -EINTR;
}
if (err) {
bt_dev_err(hu->hdev, "LPM transaction timeout");
return -ETIMEDOUT;
}
return err;
}
static int intel_lpm_suspend(struct hci_uart *hu)
{
static const u8 suspend[] = { 0x01, 0x01, 0x01 };
struct intel_data *intel = hu->priv;
struct sk_buff *skb;
if (!test_bit(STATE_LPM_ENABLED, &intel->flags) ||
test_bit(STATE_SUSPENDED, &intel->flags))
return 0;
if (test_bit(STATE_TX_ACTIVE, &intel->flags))
return -EAGAIN;
bt_dev_dbg(hu->hdev, "Suspending");
skb = bt_skb_alloc(sizeof(suspend), GFP_KERNEL);
if (!skb) {
bt_dev_err(hu->hdev, "Failed to alloc memory for LPM packet");
return -ENOMEM;
}
memcpy(skb_put(skb, sizeof(suspend)), suspend, sizeof(suspend));
bt_cb(skb)->pkt_type = HCI_LPM_PKT;
set_bit(STATE_LPM_TRANSACTION, &intel->flags);
/* LPM flow is a priority, enqueue packet at list head */
skb_queue_head(&intel->txq, skb);
hci_uart_tx_wakeup(hu);
intel_wait_lpm_transaction(hu);
/* Even in case of failure, continue and test the suspended flag */
clear_bit(STATE_LPM_TRANSACTION, &intel->flags);
if (!test_bit(STATE_SUSPENDED, &intel->flags)) {
bt_dev_err(hu->hdev, "Device suspend error");
return -EINVAL;
}
bt_dev_dbg(hu->hdev, "Suspended");
hci_uart_set_flow_control(hu, true);
return 0;
}
static int intel_lpm_resume(struct hci_uart *hu)
{
struct intel_data *intel = hu->priv;
struct sk_buff *skb;
if (!test_bit(STATE_LPM_ENABLED, &intel->flags) ||
!test_bit(STATE_SUSPENDED, &intel->flags))
return 0;
bt_dev_dbg(hu->hdev, "Resuming");
hci_uart_set_flow_control(hu, false);
skb = bt_skb_alloc(0, GFP_KERNEL);
if (!skb) {
bt_dev_err(hu->hdev, "Failed to alloc memory for LPM packet");
return -ENOMEM;
}
bt_cb(skb)->pkt_type = HCI_LPM_WAKE_PKT;
set_bit(STATE_LPM_TRANSACTION, &intel->flags);
/* LPM flow is a priority, enqueue packet at list head */
skb_queue_head(&intel->txq, skb);
hci_uart_tx_wakeup(hu);
intel_wait_lpm_transaction(hu);
/* Even in case of failure, continue and test the suspended flag */
clear_bit(STATE_LPM_TRANSACTION, &intel->flags);
if (test_bit(STATE_SUSPENDED, &intel->flags)) {
bt_dev_err(hu->hdev, "Device resume error");
return -EINVAL;
}
bt_dev_dbg(hu->hdev, "Resumed");
return 0;
}
#endif /* CONFIG_PM */
static int intel_lpm_host_wake(struct hci_uart *hu)
{
static const u8 lpm_resume_ack[] = { LPM_OP_RESUME_ACK, 0x00 };
struct intel_data *intel = hu->priv;
struct sk_buff *skb;
hci_uart_set_flow_control(hu, false);
clear_bit(STATE_SUSPENDED, &intel->flags);
skb = bt_skb_alloc(sizeof(lpm_resume_ack), GFP_KERNEL);
if (!skb) {
bt_dev_err(hu->hdev, "Failed to alloc memory for LPM packet");
return -ENOMEM;
}
memcpy(skb_put(skb, sizeof(lpm_resume_ack)), lpm_resume_ack,
sizeof(lpm_resume_ack));
bt_cb(skb)->pkt_type = HCI_LPM_PKT;
/* LPM flow is a priority, enqueue packet at list head */
skb_queue_head(&intel->txq, skb);
hci_uart_tx_wakeup(hu);
bt_dev_dbg(hu->hdev, "Resumed by controller");
return 0;
}
static irqreturn_t intel_irq(int irq, void *dev_id)
{
struct intel_device *idev = dev_id;
dev_info(&idev->pdev->dev, "hci_intel irq\n");
mutex_lock(&idev->hu_lock);
if (idev->hu)
intel_lpm_host_wake(idev->hu);
mutex_unlock(&idev->hu_lock);
/* Host/Controller are now LPM resumed, trigger a new delayed suspend */
pm_runtime_get(&idev->pdev->dev);
pm_runtime_mark_last_busy(&idev->pdev->dev);
pm_runtime_put_autosuspend(&idev->pdev->dev);
return IRQ_HANDLED;
}
static int intel_set_power(struct hci_uart *hu, bool powered)
{
struct list_head *p;
int err = -ENODEV;
spin_lock(&intel_device_list_lock);
mutex_lock(&intel_device_list_lock);
list_for_each(p, &intel_device_list) {
struct intel_device *idev = list_entry(p, struct intel_device,
@ -139,13 +328,73 @@ static int intel_set_power(struct hci_uart *hu, bool powered)
hu, dev_name(&idev->pdev->dev), powered);
gpiod_set_value(idev->reset, powered);
/* Provide to idev a hu reference which is used to run LPM
* transactions (lpm suspend/resume) from PM callbacks.
* hu needs to be protected against concurrent removing during
* these PM ops.
*/
mutex_lock(&idev->hu_lock);
idev->hu = powered ? hu : NULL;
mutex_unlock(&idev->hu_lock);
if (idev->irq < 0)
break;
if (powered && device_can_wakeup(&idev->pdev->dev)) {
err = devm_request_threaded_irq(&idev->pdev->dev,
idev->irq, NULL,
intel_irq,
IRQF_ONESHOT,
"bt-host-wake", idev);
if (err) {
BT_ERR("hu %p, unable to allocate irq-%d",
hu, idev->irq);
break;
}
device_wakeup_enable(&idev->pdev->dev);
pm_runtime_set_active(&idev->pdev->dev);
pm_runtime_use_autosuspend(&idev->pdev->dev);
pm_runtime_set_autosuspend_delay(&idev->pdev->dev,
LPM_SUSPEND_DELAY_MS);
pm_runtime_enable(&idev->pdev->dev);
} else if (!powered && device_may_wakeup(&idev->pdev->dev)) {
devm_free_irq(&idev->pdev->dev, idev->irq, idev);
device_wakeup_disable(&idev->pdev->dev);
pm_runtime_disable(&idev->pdev->dev);
}
}
spin_unlock(&intel_device_list_lock);
mutex_unlock(&intel_device_list_lock);
return err;
}
static void intel_busy_work(struct work_struct *work)
{
struct list_head *p;
struct intel_data *intel = container_of(work, struct intel_data,
busy_work);
/* Link is busy, delay the suspend */
mutex_lock(&intel_device_list_lock);
list_for_each(p, &intel_device_list) {
struct intel_device *idev = list_entry(p, struct intel_device,
list);
if (intel->hu->tty->dev->parent == idev->pdev->dev.parent) {
pm_runtime_get(&idev->pdev->dev);
pm_runtime_mark_last_busy(&idev->pdev->dev);
pm_runtime_put_autosuspend(&idev->pdev->dev);
break;
}
}
mutex_unlock(&intel_device_list_lock);
}
static int intel_open(struct hci_uart *hu)
{
struct intel_data *intel;
@ -157,6 +406,9 @@ static int intel_open(struct hci_uart *hu)
return -ENOMEM;
skb_queue_head_init(&intel->txq);
INIT_WORK(&intel->busy_work, intel_busy_work);
intel->hu = hu;
hu->priv = intel;
@ -172,6 +424,8 @@ static int intel_close(struct hci_uart *hu)
BT_DBG("hu %p", hu);
cancel_work_sync(&intel->busy_work);
intel_set_power(hu, false);
skb_queue_purge(&intel->txq);
@ -237,11 +491,11 @@ static int intel_set_baudrate(struct hci_uart *hu, unsigned int speed)
if (err && err != ETIMEDOUT)
return err;
BT_INFO("%s: Change controller speed to %d", hdev->name, speed);
bt_dev_info(hdev, "Change controller speed to %d", speed);
speed_cmd[3] = intel_convert_speed(speed);
if (speed_cmd[3] == 0xff) {
BT_ERR("%s: Unsupported speed", hdev->name);
bt_dev_err(hdev, "Unsupported speed");
return -EINVAL;
}
@ -250,16 +504,15 @@ static int intel_set_baudrate(struct hci_uart *hu, unsigned int speed)
*/
skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
BT_ERR("%s: Reading Intel version information failed (%ld)",
hdev->name, PTR_ERR(skb));
bt_dev_err(hdev, "Reading Intel version information failed (%ld)",
PTR_ERR(skb));
return PTR_ERR(skb);
}
kfree_skb(skb);
skb = bt_skb_alloc(sizeof(speed_cmd), GFP_KERNEL);
if (!skb) {
BT_ERR("%s: Failed to allocate memory for baudrate packet",
hdev->name);
bt_dev_err(hdev, "Failed to alloc memory for baudrate packet");
return -ENOMEM;
}
@ -284,11 +537,14 @@ static int intel_setup(struct hci_uart *hu)
{
static const u8 reset_param[] = { 0x00, 0x01, 0x00, 0x01,
0x00, 0x08, 0x04, 0x00 };
static const u8 lpm_param[] = { 0x03, 0x07, 0x01, 0x0b };
struct intel_data *intel = hu->priv;
struct intel_device *idev = NULL;
struct hci_dev *hdev = hu->hdev;
struct sk_buff *skb;
struct intel_version *ver;
struct intel_boot_params *params;
struct list_head *p;
const struct firmware *fw;
const u8 *fw_ptr;
char fwname[64];
@ -299,7 +555,7 @@ static int intel_setup(struct hci_uart *hu)
int speed_change = 0;
int err;
BT_DBG("%s", hdev->name);
bt_dev_dbg(hdev, "start intel_setup");
hu->hdev->set_bdaddr = btintel_set_bdaddr;
@ -335,21 +591,21 @@ static int intel_setup(struct hci_uart *hu)
*/
skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
BT_ERR("%s: Reading Intel version information failed (%ld)",
hdev->name, PTR_ERR(skb));
bt_dev_err(hdev, "Reading Intel version information failed (%ld)",
PTR_ERR(skb));
return PTR_ERR(skb);
}
if (skb->len != sizeof(*ver)) {
BT_ERR("%s: Intel version event size mismatch", hdev->name);
bt_dev_err(hdev, "Intel version event size mismatch");
kfree_skb(skb);
return -EILSEQ;
}
ver = (struct intel_version *)skb->data;
if (ver->status) {
BT_ERR("%s: Intel version command failure (%02x)",
hdev->name, ver->status);
bt_dev_err(hdev, "Intel version command failure (%02x)",
ver->status);
err = -bt_to_errno(ver->status);
kfree_skb(skb);
return err;
@ -359,8 +615,8 @@ static int intel_setup(struct hci_uart *hu)
* for now only accept this single value.
*/
if (ver->hw_platform != 0x37) {
BT_ERR("%s: Unsupported Intel hardware platform (%u)",
hdev->name, ver->hw_platform);
bt_dev_err(hdev, "Unsupported Intel hardware platform (%u)",
ver->hw_platform);
kfree_skb(skb);
return -EINVAL;
}
@ -371,8 +627,8 @@ static int intel_setup(struct hci_uart *hu)
* when newer hardware variants come along.
*/
if (ver->hw_variant != 0x0b) {
BT_ERR("%s: Unsupported Intel hardware variant (%u)",
hdev->name, ver->hw_variant);
bt_dev_err(hdev, "Unsupported Intel hardware variant (%u)",
ver->hw_variant);
kfree_skb(skb);
return -EINVAL;
}
@ -403,8 +659,8 @@ static int intel_setup(struct hci_uart *hu)
* choice is to return an error and abort the device initialization.
*/
if (ver->fw_variant != 0x06) {
BT_ERR("%s: Unsupported Intel firmware variant (%u)",
hdev->name, ver->fw_variant);
bt_dev_err(hdev, "Unsupported Intel firmware variant (%u)",
ver->fw_variant);
kfree_skb(skb);
return -ENODEV;
}
@ -416,33 +672,33 @@ static int intel_setup(struct hci_uart *hu)
*/
skb = __hci_cmd_sync(hdev, 0xfc0d, 0, NULL, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
BT_ERR("%s: Reading Intel boot parameters failed (%ld)",
hdev->name, PTR_ERR(skb));
bt_dev_err(hdev, "Reading Intel boot parameters failed (%ld)",
PTR_ERR(skb));
return PTR_ERR(skb);
}
if (skb->len != sizeof(*params)) {
BT_ERR("%s: Intel boot parameters size mismatch", hdev->name);
bt_dev_err(hdev, "Intel boot parameters size mismatch");
kfree_skb(skb);
return -EILSEQ;
}
params = (struct intel_boot_params *)skb->data;
if (params->status) {
BT_ERR("%s: Intel boot parameters command failure (%02x)",
hdev->name, params->status);
bt_dev_err(hdev, "Intel boot parameters command failure (%02x)",
params->status);
err = -bt_to_errno(params->status);
kfree_skb(skb);
return err;
}
BT_INFO("%s: Device revision is %u", hdev->name,
le16_to_cpu(params->dev_revid));
bt_dev_info(hdev, "Device revision is %u",
le16_to_cpu(params->dev_revid));
BT_INFO("%s: Secure boot is %s", hdev->name,
params->secure_boot ? "enabled" : "disabled");
bt_dev_info(hdev, "Secure boot is %s",
params->secure_boot ? "enabled" : "disabled");
BT_INFO("%s: Minimum firmware build %u week %u %u", hdev->name,
bt_dev_info(hdev, "Minimum firmware build %u week %u %u",
params->min_fw_build_nn, params->min_fw_build_cw,
2000 + params->min_fw_build_yy);
@ -451,8 +707,8 @@ static int intel_setup(struct hci_uart *hu)
* that this bootloader does not send them, then abort the setup.
*/
if (params->limited_cce != 0x00) {
BT_ERR("%s: Unsupported Intel firmware loading method (%u)",
hdev->name, params->limited_cce);
bt_dev_err(hdev, "Unsupported Intel firmware loading method (%u)",
params->limited_cce);
kfree_skb(skb);
return -EINVAL;
}
@ -461,7 +717,7 @@ static int intel_setup(struct hci_uart *hu)
* also be no valid address for the operational firmware.
*/
if (!bacmp(&params->otp_bdaddr, BDADDR_ANY)) {
BT_INFO("%s: No device address configured", hdev->name);
bt_dev_info(hdev, "No device address configured");
set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
}
@ -476,19 +732,23 @@ static int intel_setup(struct hci_uart *hu)
err = request_firmware(&fw, fwname, &hdev->dev);
if (err < 0) {
BT_ERR("%s: Failed to load Intel firmware file (%d)",
hdev->name, err);
bt_dev_err(hdev, "Failed to load Intel firmware file (%d)",
err);
kfree_skb(skb);
return err;
}
BT_INFO("%s: Found device firmware: %s", hdev->name, fwname);
bt_dev_info(hdev, "Found device firmware: %s", fwname);
/* Save the DDC file name for later */
snprintf(fwname, sizeof(fwname), "intel/ibt-11-%u.ddc",
le16_to_cpu(params->dev_revid));
kfree_skb(skb);
if (fw->size < 644) {
BT_ERR("%s: Invalid size of firmware file (%zu)",
hdev->name, fw->size);
bt_dev_err(hdev, "Invalid size of firmware file (%zu)",
fw->size);
err = -EBADF;
goto done;
}
@ -500,8 +760,7 @@ static int intel_setup(struct hci_uart *hu)
*/
err = btintel_secure_send(hdev, 0x00, 128, fw->data);
if (err < 0) {
BT_ERR("%s: Failed to send firmware header (%d)",
hdev->name, err);
bt_dev_err(hdev, "Failed to send firmware header (%d)", err);
goto done;
}
@ -510,8 +769,8 @@ static int intel_setup(struct hci_uart *hu)
*/
err = btintel_secure_send(hdev, 0x03, 256, fw->data + 128);
if (err < 0) {
BT_ERR("%s: Failed to send firmware public key (%d)",
hdev->name, err);
bt_dev_err(hdev, "Failed to send firmware public key (%d)",
err);
goto done;
}
@ -520,8 +779,8 @@ static int intel_setup(struct hci_uart *hu)
*/
err = btintel_secure_send(hdev, 0x02, 256, fw->data + 388);
if (err < 0) {
BT_ERR("%s: Failed to send firmware signature (%d)",
hdev->name, err);
bt_dev_err(hdev, "Failed to send firmware signature (%d)",
err);
goto done;
}
@ -533,8 +792,8 @@ static int intel_setup(struct hci_uart *hu)
frag_len += sizeof(*cmd) + cmd->plen;
BT_DBG("%s: patching %td/%zu", hdev->name,
(fw_ptr - fw->data), fw->size);
bt_dev_dbg(hdev, "Patching %td/%zu", (fw_ptr - fw->data),
fw->size);
/* The parameter length of the secure send command requires
* a 4 byte alignment. It happens so that the firmware file
@ -552,8 +811,8 @@ static int intel_setup(struct hci_uart *hu)
*/
err = btintel_secure_send(hdev, 0x01, frag_len, fw_ptr);
if (err < 0) {
BT_ERR("%s: Failed to send firmware data (%d)",
hdev->name, err);
bt_dev_err(hdev, "Failed to send firmware data (%d)",
err);
goto done;
}
@ -563,7 +822,7 @@ static int intel_setup(struct hci_uart *hu)
set_bit(STATE_FIRMWARE_LOADED, &intel->flags);
BT_INFO("%s: Waiting for firmware download to complete", hdev->name);
bt_dev_info(hdev, "Waiting for firmware download to complete");
/* Before switching the device into operational mode and with that
* booting the loaded firmware, wait for the bootloader notification
@ -580,19 +839,19 @@ static int intel_setup(struct hci_uart *hu)
TASK_INTERRUPTIBLE,
msecs_to_jiffies(5000));
if (err == 1) {
BT_ERR("%s: Firmware loading interrupted", hdev->name);
bt_dev_err(hdev, "Firmware loading interrupted");
err = -EINTR;
goto done;
}
if (err) {
BT_ERR("%s: Firmware loading timeout", hdev->name);
bt_dev_err(hdev, "Firmware loading timeout");
err = -ETIMEDOUT;
goto done;
}
if (test_bit(STATE_FIRMWARE_FAILED, &intel->flags)) {
BT_ERR("%s: Firmware loading failed", hdev->name);
bt_dev_err(hdev, "Firmware loading failed");
err = -ENOEXEC;
goto done;
}
@ -601,7 +860,7 @@ static int intel_setup(struct hci_uart *hu)
delta = ktime_sub(rettime, calltime);
duration = (unsigned long long) ktime_to_ns(delta) >> 10;
BT_INFO("%s: Firmware loaded in %llu usecs", hdev->name, duration);
bt_dev_info(hdev, "Firmware loaded in %llu usecs", duration);
done:
release_firmware(fw);
@ -634,7 +893,7 @@ done:
* 1 second. However if that happens, then just fail the setup
* since something went wrong.
*/
BT_INFO("%s: Waiting for device to boot", hdev->name);
bt_dev_info(hdev, "Waiting for device to boot");
err = intel_wait_booting(hu);
if (err)
@ -646,7 +905,39 @@ done:
delta = ktime_sub(rettime, calltime);
duration = (unsigned long long) ktime_to_ns(delta) >> 10;
BT_INFO("%s: Device booted in %llu usecs", hdev->name, duration);
bt_dev_info(hdev, "Device booted in %llu usecs", duration);
/* Enable LPM if matching pdev with wakeup enabled */
mutex_lock(&intel_device_list_lock);
list_for_each(p, &intel_device_list) {
struct intel_device *dev = list_entry(p, struct intel_device,
list);
if (hu->tty->dev->parent == dev->pdev->dev.parent) {
if (device_may_wakeup(&dev->pdev->dev))
idev = dev;
break;
}
}
mutex_unlock(&intel_device_list_lock);
if (!idev)
goto no_lpm;
bt_dev_info(hdev, "Enabling LPM");
skb = __hci_cmd_sync(hdev, 0xfc8b, sizeof(lpm_param), lpm_param,
HCI_CMD_TIMEOUT);
if (IS_ERR(skb)) {
bt_dev_err(hdev, "Failed to enable LPM");
goto no_lpm;
}
kfree_skb(skb);
set_bit(STATE_LPM_ENABLED, &intel->flags);
no_lpm:
/* Ignore errors, device can work without DDC parameters */
btintel_load_ddc_config(hdev, fwname);
skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_CMD_TIMEOUT);
if (IS_ERR(skb))
@ -659,7 +950,7 @@ done:
return err;
}
BT_INFO("%s: Setup complete", hdev->name);
bt_dev_info(hdev, "Setup complete");
clear_bit(STATE_BOOTLOADER, &intel->flags);
@ -708,10 +999,71 @@ recv:
return hci_recv_frame(hdev, skb);
}
static void intel_recv_lpm_notify(struct hci_dev *hdev, int value)
{
struct hci_uart *hu = hci_get_drvdata(hdev);
struct intel_data *intel = hu->priv;
bt_dev_dbg(hdev, "TX idle notification (%d)", value);
if (value) {
set_bit(STATE_TX_ACTIVE, &intel->flags);
schedule_work(&intel->busy_work);
} else {
clear_bit(STATE_TX_ACTIVE, &intel->flags);
}
}
static int intel_recv_lpm(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_lpm_pkt *lpm = (void *)skb->data;
struct hci_uart *hu = hci_get_drvdata(hdev);
struct intel_data *intel = hu->priv;
switch (lpm->opcode) {
case LPM_OP_TX_NOTIFY:
if (lpm->dlen < 1) {
bt_dev_err(hu->hdev, "Invalid LPM notification packet");
break;
}
intel_recv_lpm_notify(hdev, lpm->data[0]);
break;
case LPM_OP_SUSPEND_ACK:
set_bit(STATE_SUSPENDED, &intel->flags);
if (test_and_clear_bit(STATE_LPM_TRANSACTION, &intel->flags)) {
smp_mb__after_atomic();
wake_up_bit(&intel->flags, STATE_LPM_TRANSACTION);
}
break;
case LPM_OP_RESUME_ACK:
clear_bit(STATE_SUSPENDED, &intel->flags);
if (test_and_clear_bit(STATE_LPM_TRANSACTION, &intel->flags)) {
smp_mb__after_atomic();
wake_up_bit(&intel->flags, STATE_LPM_TRANSACTION);
}
break;
default:
bt_dev_err(hdev, "Unknown LPM opcode (%02x)", lpm->opcode);
break;
}
kfree_skb(skb);
return 0;
}
#define INTEL_RECV_LPM \
.type = HCI_LPM_PKT, \
.hlen = HCI_LPM_HDR_SIZE, \
.loff = 1, \
.lsize = 1, \
.maxlen = HCI_LPM_MAX_SIZE
static const struct h4_recv_pkt intel_recv_pkts[] = {
{ H4_RECV_ACL, .recv = hci_recv_frame },
{ H4_RECV_SCO, .recv = hci_recv_frame },
{ H4_RECV_EVENT, .recv = intel_recv_event },
{ H4_RECV_ACL, .recv = hci_recv_frame },
{ H4_RECV_SCO, .recv = hci_recv_frame },
{ H4_RECV_EVENT, .recv = intel_recv_event },
{ INTEL_RECV_LPM, .recv = intel_recv_lpm },
};
static int intel_recv(struct hci_uart *hu, const void *data, int count)
@ -726,7 +1078,7 @@ static int intel_recv(struct hci_uart *hu, const void *data, int count)
ARRAY_SIZE(intel_recv_pkts));
if (IS_ERR(intel->rx_skb)) {
int err = PTR_ERR(intel->rx_skb);
BT_ERR("%s: Frame reassembly failed (%d)", hu->hdev->name, err);
bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
intel->rx_skb = NULL;
return err;
}
@ -737,9 +1089,27 @@ static int intel_recv(struct hci_uart *hu, const void *data, int count)
static int intel_enqueue(struct hci_uart *hu, struct sk_buff *skb)
{
struct intel_data *intel = hu->priv;
struct list_head *p;
BT_DBG("hu %p skb %p", hu, skb);
/* Be sure our controller is resumed and potential LPM transaction
* completed before enqueuing any packet.
*/
mutex_lock(&intel_device_list_lock);
list_for_each(p, &intel_device_list) {
struct intel_device *idev = list_entry(p, struct intel_device,
list);
if (hu->tty->dev->parent == idev->pdev->dev.parent) {
pm_runtime_get_sync(&idev->pdev->dev);
pm_runtime_mark_last_busy(&idev->pdev->dev);
pm_runtime_put_autosuspend(&idev->pdev->dev);
break;
}
}
mutex_unlock(&intel_device_list_lock);
skb_queue_tail(&intel->txq, skb);
return 0;
@ -813,6 +1183,59 @@ static int intel_acpi_probe(struct intel_device *idev)
}
#endif
#ifdef CONFIG_PM
static int intel_suspend_device(struct device *dev)
{
struct intel_device *idev = dev_get_drvdata(dev);
mutex_lock(&idev->hu_lock);
if (idev->hu)
intel_lpm_suspend(idev->hu);
mutex_unlock(&idev->hu_lock);
return 0;
}
static int intel_resume_device(struct device *dev)
{
struct intel_device *idev = dev_get_drvdata(dev);
mutex_lock(&idev->hu_lock);
if (idev->hu)
intel_lpm_resume(idev->hu);
mutex_unlock(&idev->hu_lock);
return 0;
}
#endif
#ifdef CONFIG_PM_SLEEP
static int intel_suspend(struct device *dev)
{
struct intel_device *idev = dev_get_drvdata(dev);
if (device_may_wakeup(dev))
enable_irq_wake(idev->irq);
return intel_suspend_device(dev);
}
static int intel_resume(struct device *dev)
{
struct intel_device *idev = dev_get_drvdata(dev);
if (device_may_wakeup(dev))
disable_irq_wake(idev->irq);
return intel_resume_device(dev);
}
#endif
static const struct dev_pm_ops intel_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(intel_suspend, intel_resume)
SET_RUNTIME_PM_OPS(intel_suspend_device, intel_resume_device, NULL)
};
static int intel_probe(struct platform_device *pdev)
{
struct intel_device *idev;
@ -821,6 +1244,8 @@ static int intel_probe(struct platform_device *pdev)
if (!idev)
return -ENOMEM;
mutex_init(&idev->hu_lock);
idev->pdev = pdev;
if (ACPI_HANDLE(&pdev->dev)) {
@ -838,14 +1263,40 @@ static int intel_probe(struct platform_device *pdev)
return PTR_ERR(idev->reset);
}
idev->irq = platform_get_irq(pdev, 0);
if (idev->irq < 0) {
struct gpio_desc *host_wake;
dev_err(&pdev->dev, "No IRQ, falling back to gpio-irq\n");
host_wake = devm_gpiod_get_optional(&pdev->dev, "host-wake",
GPIOD_IN);
if (IS_ERR(host_wake)) {
dev_err(&pdev->dev, "Unable to retrieve IRQ\n");
goto no_irq;
}
idev->irq = gpiod_to_irq(host_wake);
if (idev->irq < 0) {
dev_err(&pdev->dev, "No corresponding irq for gpio\n");
goto no_irq;
}
}
/* Only enable wake-up/irq when controller is powered */
device_set_wakeup_capable(&pdev->dev, true);
device_wakeup_disable(&pdev->dev);
no_irq:
platform_set_drvdata(pdev, idev);
/* Place this instance on the device list */
spin_lock(&intel_device_list_lock);
mutex_lock(&intel_device_list_lock);
list_add_tail(&idev->list, &intel_device_list);
spin_unlock(&intel_device_list_lock);
mutex_unlock(&intel_device_list_lock);
dev_info(&pdev->dev, "registered.\n");
dev_info(&pdev->dev, "registered, gpio(%d)/irq(%d).\n",
desc_to_gpio(idev->reset), idev->irq);
return 0;
}
@ -854,9 +1305,11 @@ static int intel_remove(struct platform_device *pdev)
{
struct intel_device *idev = platform_get_drvdata(pdev);
spin_lock(&intel_device_list_lock);
device_wakeup_disable(&pdev->dev);
mutex_lock(&intel_device_list_lock);
list_del(&idev->list);
spin_unlock(&intel_device_list_lock);
mutex_unlock(&intel_device_list_lock);
dev_info(&pdev->dev, "unregistered.\n");
@ -869,6 +1322,7 @@ static struct platform_driver intel_driver = {
.driver = {
.name = "hci_intel",
.acpi_match_table = ACPI_PTR(intel_acpi_match),
.pm = &intel_pm_ops,
},
};

12
drivers/bluetooth/hci_qca.c
View File

@ -41,13 +41,13 @@
#define HCI_IBS_SLEEP_IND 0xFE
#define HCI_IBS_WAKE_IND 0xFD
#define HCI_IBS_WAKE_ACK 0xFC
#define HCI_MAX_IBS_SIZE 10
#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 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 */
@ -181,8 +181,8 @@ static void serial_clock_vote(unsigned long vote, struct hci_uart *hu)
else
__serial_clock_off(hu->tty);
BT_DBG("Vote serial clock %s(%s)", new_vote? "true" : "false",
vote? "true" : "false");
BT_DBG("Vote serial clock %s(%s)", new_vote ? "true" : "false",
vote ? "true" : "false");
diff = jiffies_to_msecs(jiffies - qca->vote_last_jif);
@ -821,7 +821,7 @@ static struct sk_buff *qca_dequeue(struct hci_uart *hu)
static uint8_t qca_get_baudrate_value(int speed)
{
switch(speed) {
switch (speed) {
case 9600:
return QCA_BAUDRATE_9600;
case 19200:

7
drivers/net/ieee802154/Kconfig
View File

@ -32,6 +32,13 @@ config IEEE802154_AT86RF230
This driver can also be built as a module. To do so, say M here.
the module will be called 'at86rf230'.
config IEEE802154_AT86RF230_DEBUGFS
depends on IEEE802154_AT86RF230
bool "AT86RF230 debugfs interface"
depends on DEBUG_FS
---help---
This option compiles debugfs code for the at86rf230 driver.
config IEEE802154_MRF24J40
tristate "Microchip MRF24J40 transceiver driver"
depends on IEEE802154_DRIVERS && MAC802154

195
drivers/net/ieee802154/at86rf230.c
View File

@ -31,6 +31,7 @@
#include <linux/skbuff.h>
#include <linux/of_gpio.h>
#include <linux/ieee802154.h>
#include <linux/debugfs.h>
#include <net/mac802154.h>
#include <net/cfg802154.h>
@ -83,6 +84,15 @@ struct at86rf230_state_change {
bool irq_enable;
};
struct at86rf230_trac {
u64 success;
u64 success_data_pending;
u64 success_wait_for_ack;
u64 channel_access_failure;
u64 no_ack;
u64 invalid;
};
struct at86rf230_local {
struct spi_device *spi;
@ -103,6 +113,8 @@ struct at86rf230_local {
u8 tx_retry;
struct sk_buff *tx_skb;
struct at86rf230_state_change tx;
struct at86rf230_trac trac;
};
#define AT86RF2XX_NUMREGS 0x3F
@ -377,14 +389,6 @@ at86rf230_async_read_reg(struct at86rf230_local *lp, const u8 reg,
}
}
static inline u8 at86rf230_state_to_force(u8 state)
{
if (state == STATE_TX_ON)
return STATE_FORCE_TX_ON;
else
return STATE_FORCE_TRX_OFF;
}
static void
at86rf230_async_state_assert(void *context)
{
@ -426,7 +430,7 @@ at86rf230_async_state_assert(void *context)
u8 state = ctx->to_state;
if (lp->tx_retry >= AT86RF2XX_MAX_TX_RETRIES)
state = at86rf230_state_to_force(state);
state = STATE_FORCE_TRX_OFF;
lp->tx_retry++;
at86rf230_async_state_change(lp, ctx, state,
@ -667,28 +671,34 @@ at86rf230_tx_trac_check(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
const u8 *buf = ctx->buf;
const u8 trac = (buf[1] & 0xe0) >> 5;
/* If trac status is different than zero we need to do a state change
* to STATE_FORCE_TRX_OFF then STATE_RX_AACK_ON to recover the
* transceiver.
*/
if (trac)
at86rf230_async_state_change(lp, ctx, STATE_FORCE_TRX_OFF,
at86rf230_tx_on, true);
else
at86rf230_tx_on(context);
}
if (IS_ENABLED(CONFIG_IEEE802154_AT86RF230_DEBUGFS)) {
u8 trac = TRAC_MASK(ctx->buf[1]);
static void
at86rf230_tx_trac_status(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
switch (trac) {
case TRAC_SUCCESS:
lp->trac.success++;
break;
case TRAC_SUCCESS_DATA_PENDING:
lp->trac.success_data_pending++;
break;
case TRAC_CHANNEL_ACCESS_FAILURE:
lp->trac.channel_access_failure++;
break;
case TRAC_NO_ACK:
lp->trac.no_ack++;
break;
case TRAC_INVALID:
lp->trac.invalid++;
break;
default:
WARN_ONCE(1, "received tx trac status %d\n", trac);
break;
}
}
at86rf230_async_read_reg(lp, RG_TRX_STATE, ctx,
at86rf230_tx_trac_check, true);
at86rf230_async_state_change(lp, &lp->irq, STATE_TX_ON,
at86rf230_tx_on, true);
}
static void
@ -723,13 +733,32 @@ at86rf230_rx_read_frame_complete(void *context)
}
static void
at86rf230_rx_read_frame(void *context)
at86rf230_rx_trac_check(void *context)
{
struct at86rf230_state_change *ctx = context;
struct at86rf230_local *lp = ctx->lp;
u8 *buf = ctx->buf;
int rc;
if (IS_ENABLED(CONFIG_IEEE802154_AT86RF230_DEBUGFS)) {
u8 trac = TRAC_MASK(buf[1]);
switch (trac) {
case TRAC_SUCCESS:
lp->trac.success++;
break;
case TRAC_SUCCESS_WAIT_FOR_ACK:
lp->trac.success_wait_for_ack++;
break;
case TRAC_INVALID:
lp->trac.invalid++;
break;
default:
WARN_ONCE(1, "received rx trac status %d\n", trac);
break;
}
}
buf[0] = CMD_FB;
ctx->trx.len = AT86RF2XX_MAX_BUF;
ctx->msg.complete = at86rf230_rx_read_frame_complete;
@ -741,27 +770,13 @@ at86rf230_rx_read_frame(void *context)
}
}
static void
at86rf230_rx_trac_check(void *context)
{
/* Possible check on trac status here. This could be useful to make
* some stats why receive is failed. Not used at the moment, but it's
* maybe timing relevant. Datasheet doesn't say anything about this.
* The programming guide say do it so.
*/
at86rf230_rx_read_frame(context);
}
static void
at86rf230_irq_trx_end(struct at86rf230_local *lp)
{
if (lp->is_tx) {
lp->is_tx = 0;
at86rf230_async_state_change(lp, &lp->irq,
STATE_FORCE_TX_ON,
at86rf230_tx_trac_status,
true);
at86rf230_async_read_reg(lp, RG_TRX_STATE, &lp->irq,
at86rf230_tx_trac_check, true);
} else {
at86rf230_async_read_reg(lp, RG_TRX_STATE, &lp->irq,
at86rf230_rx_trac_check, true);
@ -920,6 +935,10 @@ at86rf230_start(struct ieee802154_hw *hw)
{
struct at86rf230_local *lp = hw->priv;
/* reset trac stats on start */
if (IS_ENABLED(CONFIG_IEEE802154_AT86RF230_DEBUGFS))
memset(&lp->trac, 0, sizeof(struct at86rf230_trac));
at86rf230_awake(lp);
enable_irq(lp->spi->irq);
@ -1357,7 +1376,7 @@ static int at86rf230_hw_init(struct at86rf230_local *lp, u8 xtal_trim)
if (irq_type == IRQ_TYPE_EDGE_RISING ||
irq_type == IRQ_TYPE_EDGE_FALLING)
dev_warn(&lp->spi->dev,
"Using edge triggered irq's are not recommended!\n");
"Using edge triggered irq's are not recommended, because it can cause races and result in a non-functional driver!\n");
if (irq_type == IRQ_TYPE_EDGE_FALLING ||
irq_type == IRQ_TYPE_LEVEL_LOW)
irq_pol = IRQ_ACTIVE_LOW;
@ -1620,6 +1639,81 @@ at86rf230_setup_spi_messages(struct at86rf230_local *lp)
lp->tx.timer.function = at86rf230_async_state_timer;
}
#ifdef CONFIG_IEEE802154_AT86RF230_DEBUGFS
static struct dentry *at86rf230_debugfs_root;
static int at86rf230_stats_show(struct seq_file *file, void *offset)
{
struct at86rf230_local *lp = file->private;
int ret;
ret = seq_printf(file, "SUCCESS:\t\t%8llu\n", lp->trac.success);
if (ret < 0)
return ret;
ret = seq_printf(file, "SUCCESS_DATA_PENDING:\t%8llu\n",
lp->trac.success_data_pending);
if (ret < 0)
return ret;
ret = seq_printf(file, "SUCCESS_WAIT_FOR_ACK:\t%8llu\n",
lp->trac.success_wait_for_ack);
if (ret < 0)
return ret;
ret = seq_printf(file, "CHANNEL_ACCESS_FAILURE:\t%8llu\n",
lp->trac.channel_access_failure);
if (ret < 0)
return ret;
ret = seq_printf(file, "NO_ACK:\t\t\t%8llu\n", lp->trac.no_ack);
if (ret < 0)
return ret;
return seq_printf(file, "INVALID:\t\t%8llu\n", lp->trac.invalid);
}
static int at86rf230_stats_open(struct inode *inode, struct file *file)
{
return single_open(file, at86rf230_stats_show, inode->i_private);
}
static const struct file_operations at86rf230_stats_fops = {
.open = at86rf230_stats_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int at86rf230_debugfs_init(struct at86rf230_local *lp)
{
char debugfs_dir_name[DNAME_INLINE_LEN + 1] = "at86rf230-";
struct dentry *stats;
strncat(debugfs_dir_name, dev_name(&lp->spi->dev), DNAME_INLINE_LEN);
at86rf230_debugfs_root = debugfs_create_dir(debugfs_dir_name, NULL);
if (!at86rf230_debugfs_root)
return -ENOMEM;
stats = debugfs_create_file("trac_stats", S_IRUGO,
at86rf230_debugfs_root, lp,
&at86rf230_stats_fops);
if (!stats)
return -ENOMEM;
return 0;
}
static void at86rf230_debugfs_remove(void)
{
debugfs_remove_recursive(at86rf230_debugfs_root);
}
#else
static int at86rf230_debugfs_init(struct at86rf230_local *lp) { return 0; }
static void at86rf230_debugfs_remove(void) { }
#endif
static int at86rf230_probe(struct spi_device *spi)
{
struct ieee802154_hw *hw;
@ -1715,12 +1809,18 @@ static int at86rf230_probe(struct spi_device *spi)
/* going into sleep by default */
at86rf230_sleep(lp);
rc = ieee802154_register_hw(lp->hw);
rc = at86rf230_debugfs_init(lp);
if (rc)
goto free_dev;
rc = ieee802154_register_hw(lp->hw);
if (rc)
goto free_debugfs;
return rc;
free_debugfs:
at86rf230_debugfs_remove();
free_dev:
ieee802154_free_hw(lp->hw);
@ -1735,6 +1835,7 @@ static int at86rf230_remove(struct spi_device *spi)
at86rf230_write_subreg(lp, SR_IRQ_MASK, 0);
ieee802154_unregister_hw(lp->hw);
ieee802154_free_hw(lp->hw);
at86rf230_debugfs_remove();
dev_dbg(&spi->dev, "unregistered at86rf230\n");
return 0;

8
drivers/net/ieee802154/at86rf230.h
View File

@ -216,5 +216,13 @@
#define STATE_TRANSITION_IN_PROGRESS 0x1F
#define TRX_STATE_MASK (0x1F)
#define TRAC_MASK(x) ((x & 0xe0) >> 5)
#define TRAC_SUCCESS 0
#define TRAC_SUCCESS_DATA_PENDING 1
#define TRAC_SUCCESS_WAIT_FOR_ACK 2
#define TRAC_CHANNEL_ACCESS_FAILURE 3
#define TRAC_NO_ACK 5
#define TRAC_INVALID 7
#endif /* !_AT86RF230_H */

13
drivers/net/ieee802154/atusb.c
View File

@ -559,6 +559,7 @@ static int atusb_get_and_show_chip(struct atusb *atusb)
{
struct usb_device *usb_dev = atusb->usb_dev;
uint8_t man_id_0, man_id_1, part_num, version_num;
const char *chip;
man_id_0 = atusb_read_reg(atusb, RG_MAN_ID_0);
man_id_1 = atusb_read_reg(atusb, RG_MAN_ID_1);
@ -574,14 +575,22 @@ static int atusb_get_and_show_chip(struct atusb *atusb)
man_id_1, man_id_0);
goto fail;
}
if (part_num != 3 && part_num != 2) {
switch (part_num) {
case 2:
chip = "AT86RF230";
break;
case 3:
chip = "AT86RF231";
break;
default:
dev_err(&usb_dev->dev,
"unexpected transceiver, part 0x%02x version 0x%02x\n",
part_num, version_num);
goto fail;
}
dev_info(&usb_dev->dev, "ATUSB: AT86RF231 version %d\n", version_num);
dev_info(&usb_dev->dev, "ATUSB: %s version %d\n", chip, version_num);
return 0;

25
include/linux/ieee802154.h
View File

@ -205,6 +205,31 @@ enum {
IEEE802154_SCAN_IN_PROGRESS = 0xfc,
};
/* frame control handling */
#define IEEE802154_FCTL_FTYPE 0x0003
#define IEEE802154_FCTL_INTRA_PAN 0x0040
#define IEEE802154_FTYPE_DATA 0x0001
/*
* ieee802154_is_data - check if type is IEEE802154_FTYPE_DATA
* @fc: frame control bytes in little-endian byteorder
*/
static inline int ieee802154_is_data(__le16 fc)
{
return (fc & cpu_to_le16(IEEE802154_FCTL_FTYPE)) ==
cpu_to_le16(IEEE802154_FTYPE_DATA);
}
/**
* ieee802154_is_intra_pan - check if intra pan id communication
* @fc: frame control bytes in little-endian byteorder
*/
static inline bool ieee802154_is_intra_pan(__le16 fc)
{
return fc & cpu_to_le16(IEEE802154_FCTL_INTRA_PAN);
}
/**
* ieee802154_is_valid_psdu_len - check if psdu len is valid
* available lengths:

144
include/net/6lowpan.h
View File

@ -126,13 +126,19 @@
(((a)[6]) == 0xFF) && \
(((a)[7]) == 0xFF))
#define LOWPAN_DISPATCH_IPV6 0x41 /* 01000001 = 65 */
#define LOWPAN_DISPATCH_HC1 0x42 /* 01000010 = 66 */
#define LOWPAN_DISPATCH_IPHC 0x60 /* 011xxxxx = ... */
#define LOWPAN_DISPATCH_FRAG1 0xc0 /* 11000xxx */
#define LOWPAN_DISPATCH_FRAGN 0xe0 /* 11100xxx */
#define LOWPAN_DISPATCH_IPV6 0x41 /* 01000001 = 65 */
#define LOWPAN_DISPATCH_IPHC 0x60 /* 011xxxxx = ... */
#define LOWPAN_DISPATCH_IPHC_MASK 0xe0
#define LOWPAN_DISPATCH_MASK 0xf8 /* 11111000 */
static inline bool lowpan_is_ipv6(u8 dispatch)
{
return dispatch == LOWPAN_DISPATCH_IPV6;
}
static inline bool lowpan_is_iphc(u8 dispatch)
{
return (dispatch & LOWPAN_DISPATCH_IPHC_MASK) == LOWPAN_DISPATCH_IPHC;
}
#define LOWPAN_FRAG_TIMEOUT (HZ * 60) /* time-out 60 sec */
@ -218,6 +224,19 @@ struct lowpan_priv *lowpan_priv(const struct net_device *dev)
return netdev_priv(dev);
}
struct lowpan_802154_cb {
u16 d_tag;
unsigned int d_size;
u8 d_offset;
};
static inline
struct lowpan_802154_cb *lowpan_802154_cb(const struct sk_buff *skb)
{
BUILD_BUG_ON(sizeof(struct lowpan_802154_cb) > sizeof(skb->cb));
return (struct lowpan_802154_cb *)skb->cb;
}
#ifdef DEBUG
/* print data in line */
static inline void raw_dump_inline(const char *caller, char *msg,
@ -280,119 +299,6 @@ static inline void lowpan_push_hc_data(u8 **hc_ptr, const void *data,
*hc_ptr += len;
}
static inline u8 lowpan_addr_mode_size(const u8 addr_mode)
{
static const u8 addr_sizes[] = {
[LOWPAN_IPHC_ADDR_00] = 16,
[LOWPAN_IPHC_ADDR_01] = 8,
[LOWPAN_IPHC_ADDR_02] = 2,
[LOWPAN_IPHC_ADDR_03] = 0,
};
return addr_sizes[addr_mode];
}
static inline u8 lowpan_next_hdr_size(const u8 h_enc, u16 *uncomp_header)
{
u8 ret = 1;
if ((h_enc & LOWPAN_NHC_UDP_MASK) == LOWPAN_NHC_UDP_ID) {
*uncomp_header += sizeof(struct udphdr);
switch (h_enc & LOWPAN_NHC_UDP_CS_P_11) {
case LOWPAN_NHC_UDP_CS_P_00:
ret += 4;
break;
case LOWPAN_NHC_UDP_CS_P_01:
case LOWPAN_NHC_UDP_CS_P_10:
ret += 3;
break;
case LOWPAN_NHC_UDP_CS_P_11:
ret++;
break;
default:
break;
}
if (!(h_enc & LOWPAN_NHC_UDP_CS_C))
ret += 2;
}
return ret;
}
/**
* lowpan_uncompress_size - returns skb->len size with uncompressed header
* @skb: sk_buff with 6lowpan header inside
* @datagram_offset: optional to get the datagram_offset value
*
* Returns the skb->len with uncompressed header
*/
static inline u16
lowpan_uncompress_size(const struct sk_buff *skb, u16 *dgram_offset)
{
u16 ret = 2, uncomp_header = sizeof(struct ipv6hdr);
u8 iphc0, iphc1, h_enc;
iphc0 = skb_network_header(skb)[0];
iphc1 = skb_network_header(skb)[1];
switch ((iphc0 & LOWPAN_IPHC_TF) >> 3) {
case 0:
ret += 4;
break;
case 1:
ret += 3;
break;
case 2:
ret++;
break;
default:
break;
}
if (!(iphc0 & LOWPAN_IPHC_NH_C))
ret++;
if (!(iphc0 & 0x03))
ret++;
ret += lowpan_addr_mode_size((iphc1 & LOWPAN_IPHC_SAM) >>
LOWPAN_IPHC_SAM_BIT);
if (iphc1 & LOWPAN_IPHC_M) {
switch ((iphc1 & LOWPAN_IPHC_DAM_11) >>
LOWPAN_IPHC_DAM_BIT) {
case LOWPAN_IPHC_DAM_00:
ret += 16;
break;
case LOWPAN_IPHC_DAM_01:
ret += 6;
break;
case LOWPAN_IPHC_DAM_10:
ret += 4;
break;
case LOWPAN_IPHC_DAM_11:
ret++;
break;
default:
break;
}
} else {
ret += lowpan_addr_mode_size((iphc1 & LOWPAN_IPHC_DAM_11) >>
LOWPAN_IPHC_DAM_BIT);
}
if (iphc0 & LOWPAN_IPHC_NH_C) {
h_enc = skb_network_header(skb)[ret];
ret += lowpan_next_hdr_size(h_enc, &uncomp_header);
}
if (dgram_offset)
*dgram_offset = uncomp_header;
return skb->len + uncomp_header - ret;
}
void lowpan_netdev_setup(struct net_device *dev, enum lowpan_lltypes lltype);
int

2
include/net/af_ieee802154.h
View File

@ -1,5 +1,5 @@
/*
* IEEE 802.15.4 inteface for userspace
* IEEE 802.15.4 interface for userspace
*
* Copyright 2007, 2008 Siemens AG
*

11
include/net/bluetooth/bluetooth.h
View File

@ -123,11 +123,22 @@ __printf(1, 2)
void bt_info(const char *fmt, ...);
__printf(1, 2)
void bt_err(const char *fmt, ...);
__printf(1, 2)
void bt_err_ratelimited(const char *fmt, ...);
#define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__)
#define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__)
#define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__)
#define BT_ERR_RATELIMITED(fmt, ...) bt_err_ratelimited(fmt "\n", ##__VA_ARGS__)
#define bt_dev_info(hdev, fmt, ...) \
BT_INFO("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
#define bt_dev_err(hdev, fmt, ...) \
BT_ERR("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
#define bt_dev_dbg(hdev, fmt, ...) \
BT_DBG("%s: " fmt, (hdev)->name, ##__VA_ARGS__)
/* Connection and socket states */
enum {
BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */

1
include/net/bluetooth/hci_core.h
View File

@ -987,6 +987,7 @@ int hci_resume_dev(struct hci_dev *hdev);
int hci_reset_dev(struct hci_dev *hdev);
int hci_dev_open(__u16 dev);
int hci_dev_close(__u16 dev);
int hci_dev_do_close(struct hci_dev *hdev);
int hci_dev_reset(__u16 dev);
int hci_dev_reset_stat(__u16 dev);
int hci_dev_cmd(unsigned int cmd, void __user *arg);

15
include/net/mac802154.h
View File

@ -249,6 +249,21 @@ struct ieee802154_ops {
const bool on);
};
/**
* ieee802154_get_fc_from_skb - get the frame control field from an skb
* @skb: skb where the frame control field will be get from
*/
static inline __le16 ieee802154_get_fc_from_skb(const struct sk_buff *skb)
{
/* return some invalid fc on failure */
if (unlikely(skb->mac_len < 2)) {
WARN_ON(1);
return cpu_to_le16(0);
}
return (__force __le16)__get_unaligned_memmove16(skb_mac_header(skb));
}
/**
* ieee802154_be64_to_le64 - copies and convert be64 to le64
* @le64_dst: le64 destination pointer

13
net/6lowpan/iphc.c
View File

@ -366,7 +366,18 @@ lowpan_header_decompress(struct sk_buff *skb, struct net_device *dev,
return err;
}
hdr.payload_len = htons(skb->len);
switch (lowpan_priv(dev)->lltype) {
case LOWPAN_LLTYPE_IEEE802154:
if (lowpan_802154_cb(skb)->d_size)
hdr.payload_len = htons(lowpan_802154_cb(skb)->d_size -
sizeof(struct ipv6hdr));
else
hdr.payload_len = htons(skb->len);
break;
default:
hdr.payload_len = htons(skb->len);
break;
}
pr_debug("skb headroom size = %d, data length = %d\n",
skb_headroom(skb), skb->len);

13
net/6lowpan/nhc_udp.c
View File

@ -71,7 +71,18 @@ static int udp_uncompress(struct sk_buff *skb, size_t needed)
* here, we obtain the hint from the remaining size of the
* frame
*/
uh.len = htons(skb->len + sizeof(struct udphdr));
switch (lowpan_priv(skb->dev)->lltype) {
case LOWPAN_LLTYPE_IEEE802154:
if (lowpan_802154_cb(skb)->d_size)
uh.len = htons(lowpan_802154_cb(skb)->d_size -
sizeof(struct ipv6hdr));
else
uh.len = htons(skb->len + sizeof(struct udphdr));
break;
default:
uh.len = htons(skb->len + sizeof(struct udphdr));
break;
}
pr_debug("uncompressed UDP length: src = %d", ntohs(uh.len));
/* replace the compressed UDP head by the uncompressed UDP

5
net/bluetooth/hci_core.c
View File

@ -693,7 +693,8 @@ static void hci_init3_req(struct hci_request *req, unsigned long opt)
hci_setup_event_mask(req);
if (hdev->commands[6] & 0x20) {
if (hdev->commands[6] & 0x20 &&
!test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
struct hci_cp_read_stored_link_key cp;
bacpy(&cp.bdaddr, BDADDR_ANY);
@ -1548,7 +1549,7 @@ static void hci_pend_le_actions_clear(struct hci_dev *hdev)
BT_DBG("All LE pending actions cleared");
}
static int hci_dev_do_close(struct hci_dev *hdev)
int hci_dev_do_close(struct hci_dev *hdev)
{
BT_DBG("%s %p", hdev->name, hdev);

21
net/bluetooth/hci_event.c
View File

@ -4719,6 +4719,27 @@ static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
struct hci_conn *conn;
bool match;
u32 flags;
u8 *ptr, real_len;
/* Find the end of the data in case the report contains padded zero
* bytes at the end causing an invalid length value.
*
* When data is NULL, len is 0 so there is no need for extra ptr
* check as 'ptr < data + 0' is already false in such case.
*/
for (ptr = data; ptr < data + len && *ptr; ptr += *ptr + 1) {
if (ptr + 1 + *ptr > data + len)
break;
}
real_len = ptr - data;
/* Adjust for actual length */
if (len != real_len) {
BT_ERR_RATELIMITED("%s advertising data length corrected",
hdev->name);
len = real_len;
}
/* If the direct address is present, then this report is from
* a LE Direct Advertising Report event. In that case it is

11
net/bluetooth/hci_sock.c
View File

@ -503,7 +503,16 @@ static int hci_sock_release(struct socket *sock)
if (hdev) {
if (hci_pi(sk)->channel == HCI_CHANNEL_USER) {
hci_dev_close(hdev->id);
/* When releasing an user channel exclusive access,
* call hci_dev_do_close directly instead of calling
* hci_dev_close to ensure the exclusive access will
* be released and the controller brought back down.
*
* The checking of HCI_AUTO_OFF is not needed in this
* case since it will have been cleared already when
* opening the user channel.
*/
hci_dev_do_close(hdev);
hci_dev_clear_flag(hdev, HCI_USER_CHANNEL);
mgmt_index_added(hdev);
}

16
net/bluetooth/lib.c
View File

@ -166,3 +166,19 @@ void bt_err(const char *format, ...)
va_end(args);
}
EXPORT_SYMBOL(bt_err);
void bt_err_ratelimited(const char *format, ...)
{
struct va_format vaf;
va_list args;
va_start(args, format);
vaf.fmt = format;
vaf.va = &args;
pr_err_ratelimited("%pV", &vaf);
va_end(args);
}
EXPORT_SYMBOL(bt_err_ratelimited);

2
net/bluetooth/smp.c
View File

@ -495,7 +495,7 @@ static int smp_ah(struct crypto_blkcipher *tfm, const u8 irk[16],
}
/* The output of the random address function ah is:
* ah(h, r) = e(k, r') mod 2^24
* ah(k, r) = e(k, r') mod 2^24
* The output of the security function e is then truncated to 24 bits
* by taking the least significant 24 bits of the output of e as the
* result of ah.

14
net/ieee802154/6lowpan/6lowpan_i.h
View File

@ -7,6 +7,15 @@
#include <net/inet_frag.h>
#include <net/6lowpan.h>
typedef unsigned __bitwise__ lowpan_rx_result;
#define RX_CONTINUE ((__force lowpan_rx_result) 0u)
#define RX_DROP_UNUSABLE ((__force lowpan_rx_result) 1u)
#define RX_DROP ((__force lowpan_rx_result) 2u)
#define RX_QUEUED ((__force lowpan_rx_result) 3u)
#define LOWPAN_DISPATCH_FRAG1 0xc0
#define LOWPAN_DISPATCH_FRAGN 0xe0
struct lowpan_create_arg {
u16 tag;
u16 d_size;
@ -40,7 +49,7 @@ static inline u32 ieee802154_addr_hash(const struct ieee802154_addr *a)
/* private device info */
struct lowpan_dev_info {
struct net_device *real_dev; /* real WPAN device ptr */
struct net_device *wdev; /* wpan device ptr */
u16 fragment_tag;
};
@ -62,4 +71,7 @@ int lowpan_header_create(struct sk_buff *skb, struct net_device *dev,
const void *_saddr, unsigned int len);
netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *dev);
int lowpan_iphc_decompress(struct sk_buff *skb);
lowpan_rx_result lowpan_rx_h_ipv6(struct sk_buff *skb);
#endif /* __IEEE802154_6LOWPAN_I_H__ */

114
net/ieee802154/6lowpan/core.c
View File

@ -61,7 +61,7 @@ static struct header_ops lowpan_header_ops = {
static struct lock_class_key lowpan_tx_busylock;
static struct lock_class_key lowpan_netdev_xmit_lock_key;
static void lowpan_set_lockdep_class_one(struct net_device *dev,
static void lowpan_set_lockdep_class_one(struct net_device *ldev,
struct netdev_queue *txq,
void *_unused)
{
@ -69,35 +69,52 @@ static void lowpan_set_lockdep_class_one(struct net_device *dev,
&lowpan_netdev_xmit_lock_key);
}
static int lowpan_dev_init(struct net_device *dev)
static int lowpan_dev_init(struct net_device *ldev)
{
netdev_for_each_tx_queue(dev, lowpan_set_lockdep_class_one, NULL);
dev->qdisc_tx_busylock = &lowpan_tx_busylock;
netdev_for_each_tx_queue(ldev, lowpan_set_lockdep_class_one, NULL);
ldev->qdisc_tx_busylock = &lowpan_tx_busylock;
return 0;
}
static int lowpan_open(struct net_device *dev)
{
if (!open_count)
lowpan_rx_init();
open_count++;
return 0;
}
static int lowpan_stop(struct net_device *dev)
{
open_count--;
if (!open_count)
lowpan_rx_exit();
return 0;
}
static const struct net_device_ops lowpan_netdev_ops = {
.ndo_init = lowpan_dev_init,
.ndo_start_xmit = lowpan_xmit,
.ndo_open = lowpan_open,
.ndo_stop = lowpan_stop,
};
static void lowpan_setup(struct net_device *dev)
static void lowpan_setup(struct net_device *ldev)
{
dev->addr_len = IEEE802154_ADDR_LEN;
memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN);
dev->type = ARPHRD_6LOWPAN;
ldev->addr_len = IEEE802154_ADDR_LEN;
memset(ldev->broadcast, 0xff, IEEE802154_ADDR_LEN);
ldev->type = ARPHRD_6LOWPAN;
/* Frame Control + Sequence Number + Address fields + Security Header */
dev->hard_header_len = 2 + 1 + 20 + 14;
dev->needed_tailroom = 2; /* FCS */
dev->mtu = IPV6_MIN_MTU;
dev->priv_flags |= IFF_NO_QUEUE;
dev->flags = IFF_BROADCAST | IFF_MULTICAST;
dev->watchdog_timeo = 0;
ldev->hard_header_len = 2 + 1 + 20 + 14;
ldev->needed_tailroom = 2; /* FCS */
ldev->mtu = IPV6_MIN_MTU;
ldev->priv_flags |= IFF_NO_QUEUE;
ldev->flags = IFF_BROADCAST | IFF_MULTICAST;
dev->netdev_ops = &lowpan_netdev_ops;
dev->header_ops = &lowpan_header_ops;
dev->destructor = free_netdev;
dev->features |= NETIF_F_NETNS_LOCAL;
ldev->netdev_ops = &lowpan_netdev_ops;
ldev->header_ops = &lowpan_header_ops;
ldev->destructor = free_netdev;
ldev->features |= NETIF_F_NETNS_LOCAL;
}
static int lowpan_validate(struct nlattr *tb[], struct nlattr *data[])
@ -109,10 +126,10 @@ static int lowpan_validate(struct nlattr *tb[], struct nlattr *data[])
return 0;
}
static int lowpan_newlink(struct net *src_net, struct net_device *dev,
static int lowpan_newlink(struct net *src_net, struct net_device *ldev,
struct nlattr *tb[], struct nlattr *data[])
{
struct net_device *real_dev;
struct net_device *wdev;
int ret;
ASSERT_RTNL();
@ -120,58 +137,47 @@ static int lowpan_newlink(struct net *src_net, struct net_device *dev,
pr_debug("adding new link\n");
if (!tb[IFLA_LINK] ||
!net_eq(dev_net(dev), &init_net))
!net_eq(dev_net(ldev), &init_net))
return -EINVAL;
/* find and hold real wpan device */
real_dev = dev_get_by_index(dev_net(dev), nla_get_u32(tb[IFLA_LINK]));
if (!real_dev)
/* find and hold wpan device */
wdev = dev_get_by_index(dev_net(ldev), nla_get_u32(tb[IFLA_LINK]));
if (!wdev)
return -ENODEV;
if (real_dev->type != ARPHRD_IEEE802154) {
dev_put(real_dev);
if (wdev->type != ARPHRD_IEEE802154) {
dev_put(wdev);
return -EINVAL;
}
if (real_dev->ieee802154_ptr->lowpan_dev) {
dev_put(real_dev);
if (wdev->ieee802154_ptr->lowpan_dev) {
dev_put(wdev);
return -EBUSY;
}
lowpan_dev_info(dev)->real_dev = real_dev;
lowpan_dev_info(ldev)->wdev = wdev;
/* Set the lowpan hardware address to the wpan hardware address. */
memcpy(dev->dev_addr, real_dev->dev_addr, IEEE802154_ADDR_LEN);
memcpy(ldev->dev_addr, wdev->dev_addr, IEEE802154_ADDR_LEN);
lowpan_netdev_setup(dev, LOWPAN_LLTYPE_IEEE802154);
lowpan_netdev_setup(ldev, LOWPAN_LLTYPE_IEEE802154);
ret = register_netdevice(dev);
ret = register_netdevice(ldev);
if (ret < 0) {
dev_put(real_dev);
dev_put(wdev);
return ret;
}
real_dev->ieee802154_ptr->lowpan_dev = dev;
if (!open_count)
lowpan_rx_init();
open_count++;
wdev->ieee802154_ptr->lowpan_dev = ldev;
return 0;
}
static void lowpan_dellink(struct net_device *dev, struct list_head *head)
static void lowpan_dellink(struct net_device *ldev, struct list_head *head)
{
struct lowpan_dev_info *lowpan_dev = lowpan_dev_info(dev);
struct net_device *real_dev = lowpan_dev->real_dev;
struct net_device *wdev = lowpan_dev_info(ldev)->wdev;
ASSERT_RTNL();
open_count--;
if (!open_count)
lowpan_rx_exit();
real_dev->ieee802154_ptr->lowpan_dev = NULL;
unregister_netdevice(dev);
dev_put(real_dev);
wdev->ieee802154_ptr->lowpan_dev = NULL;
unregister_netdevice(ldev);
dev_put(wdev);
}
static struct rtnl_link_ops lowpan_link_ops __read_mostly = {
@ -196,9 +202,9 @@ static inline void lowpan_netlink_fini(void)
static int lowpan_device_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
struct net_device *wdev = netdev_notifier_info_to_dev(ptr);
if (dev->type != ARPHRD_IEEE802154)
if (wdev->type != ARPHRD_IEEE802154)
goto out;
switch (event) {
@ -207,8 +213,8 @@ static int lowpan_device_event(struct notifier_block *unused,
* also delete possible lowpan interfaces which belongs
* to the wpan interface.
*/
if (dev->ieee802154_ptr && dev->ieee802154_ptr->lowpan_dev)
lowpan_dellink(dev->ieee802154_ptr->lowpan_dev, NULL);
if (wdev->ieee802154_ptr->lowpan_dev)
lowpan_dellink(wdev->ieee802154_ptr->lowpan_dev, NULL);
break;
default:
break;

157
net/ieee802154/6lowpan/reassembly.c
View File

@ -32,21 +32,10 @@
static const char lowpan_frags_cache_name[] = "lowpan-frags";
struct lowpan_frag_info {
u16 d_tag;
u16 d_size;
u8 d_offset;
};
static struct lowpan_frag_info *lowpan_cb(struct sk_buff *skb)
{
return (struct lowpan_frag_info *)skb->cb;
}
static struct inet_frags lowpan_frags;
static int lowpan_frag_reasm(struct lowpan_frag_queue *fq,
struct sk_buff *prev, struct net_device *dev);
struct sk_buff *prev, struct net_device *ldev);
static unsigned int lowpan_hash_frag(u16 tag, u16 d_size,
const struct ieee802154_addr *saddr,
@ -111,7 +100,7 @@ out:
}
static inline struct lowpan_frag_queue *
fq_find(struct net *net, const struct lowpan_frag_info *frag_info,
fq_find(struct net *net, const struct lowpan_802154_cb *cb,
const struct ieee802154_addr *src,
const struct ieee802154_addr *dst)
{
@ -121,12 +110,12 @@ fq_find(struct net *net, const struct lowpan_frag_info *frag_info,
struct netns_ieee802154_lowpan *ieee802154_lowpan =
net_ieee802154_lowpan(net);
arg.tag = frag_info->d_tag;
arg.d_size = frag_info->d_size;
arg.tag = cb->d_tag;
arg.d_size = cb->d_size;
arg.src = src;
arg.dst = dst;
hash = lowpan_hash_frag(frag_info->d_tag, frag_info->d_size, src, dst);
hash = lowpan_hash_frag(cb->d_tag, cb->d_size, src, dst);
q = inet_frag_find(&ieee802154_lowpan->frags,
&lowpan_frags, &arg, hash);
@ -138,17 +127,17 @@ fq_find(struct net *net, const struct lowpan_frag_info *frag_info,
}
static int lowpan_frag_queue(struct lowpan_frag_queue *fq,
struct sk_buff *skb, const u8 frag_type)
struct sk_buff *skb, u8 frag_type)
{
struct sk_buff *prev, *next;
struct net_device *dev;
struct net_device *ldev;
int end, offset;
if (fq->q.flags & INET_FRAG_COMPLETE)
goto err;
offset = lowpan_cb(skb)->d_offset << 3;
end = lowpan_cb(skb)->d_size;
offset = lowpan_802154_cb(skb)->d_offset << 3;
end = lowpan_802154_cb(skb)->d_size;
/* Is this the final fragment? */
if (offset + skb->len == end) {
@ -174,13 +163,16 @@ static int lowpan_frag_queue(struct lowpan_frag_queue *fq,
* this fragment, right?
*/
prev = fq->q.fragments_tail;
if (!prev || lowpan_cb(prev)->d_offset < lowpan_cb(skb)->d_offset) {
if (!prev ||
lowpan_802154_cb(prev)->d_offset <
lowpan_802154_cb(skb)->d_offset) {
next = NULL;
goto found;
}
prev = NULL;
for (next = fq->q.fragments; next != NULL; next = next->next) {
if (lowpan_cb(next)->d_offset >= lowpan_cb(skb)->d_offset)
if (lowpan_802154_cb(next)->d_offset >=
lowpan_802154_cb(skb)->d_offset)
break; /* bingo! */
prev = next;
}
@ -195,18 +187,15 @@ found:
else
fq->q.fragments = skb;
dev = skb->dev;
if (dev)
ldev = skb->dev;
if (ldev)
skb->dev = NULL;
fq->q.stamp = skb->tstamp;
if (frag_type == LOWPAN_DISPATCH_FRAG1) {
/* Calculate uncomp. 6lowpan header to estimate full size */
fq->q.meat += lowpan_uncompress_size(skb, NULL);
if (frag_type == LOWPAN_DISPATCH_FRAG1)
fq->q.flags |= INET_FRAG_FIRST_IN;
} else {
fq->q.meat += skb->len;
}
fq->q.meat += skb->len;
add_frag_mem_limit(fq->q.net, skb->truesize);
if (fq->q.flags == (INET_FRAG_FIRST_IN | INET_FRAG_LAST_IN) &&
@ -215,7 +204,7 @@ found:
unsigned long orefdst = skb->_skb_refdst;
skb->_skb_refdst = 0UL;
res = lowpan_frag_reasm(fq, prev, dev);
res = lowpan_frag_reasm(fq, prev, ldev);
skb->_skb_refdst = orefdst;
return res;
}
@ -235,7 +224,7 @@ err:
* the last and the first frames arrived and all the bits are here.
*/
static int lowpan_frag_reasm(struct lowpan_frag_queue *fq, struct sk_buff *prev,
struct net_device *dev)
struct net_device *ldev)
{
struct sk_buff *fp, *head = fq->q.fragments;
int sum_truesize;
@ -313,7 +302,7 @@ static int lowpan_frag_reasm(struct lowpan_frag_queue *fq, struct sk_buff *prev,
sub_frag_mem_limit(fq->q.net, sum_truesize);
head->next = NULL;
head->dev = dev;
head->dev = ldev;
head->tstamp = fq->q.stamp;
fq->q.fragments = NULL;
@ -325,24 +314,87 @@ out_oom:
return -1;
}
static int lowpan_get_frag_info(struct sk_buff *skb, const u8 frag_type,
struct lowpan_frag_info *frag_info)
static int lowpan_frag_rx_handlers_result(struct sk_buff *skb,
lowpan_rx_result res)
{
switch (res) {
case RX_QUEUED:
return NET_RX_SUCCESS;
case RX_CONTINUE:
/* nobody cared about this packet */
net_warn_ratelimited("%s: received unknown dispatch\n",
__func__);
/* fall-through */
default:
/* all others failure */
return NET_RX_DROP;
}
}
static lowpan_rx_result lowpan_frag_rx_h_iphc(struct sk_buff *skb)
{
int ret;
if (!lowpan_is_iphc(*skb_network_header(skb)))
return RX_CONTINUE;
ret = lowpan_iphc_decompress(skb);
if (ret < 0)
return RX_DROP;
return RX_QUEUED;
}
static int lowpan_invoke_frag_rx_handlers(struct sk_buff *skb)
{
lowpan_rx_result res;
#define CALL_RXH(rxh) \
do { \
res = rxh(skb); \
if (res != RX_CONTINUE) \
goto rxh_next; \
} while (0)
/* likely at first */
CALL_RXH(lowpan_frag_rx_h_iphc);
CALL_RXH(lowpan_rx_h_ipv6);
rxh_next:
return lowpan_frag_rx_handlers_result(skb, res);
#undef CALL_RXH
}
#define LOWPAN_FRAG_DGRAM_SIZE_HIGH_MASK 0x07
#define LOWPAN_FRAG_DGRAM_SIZE_HIGH_SHIFT 8
static int lowpan_get_cb(struct sk_buff *skb, u8 frag_type,
struct lowpan_802154_cb *cb)
{
bool fail;
u8 pattern = 0, low = 0;
u8 high = 0, low = 0;
__be16 d_tag = 0;
fail = lowpan_fetch_skb(skb, &pattern, 1);
fail = lowpan_fetch_skb(skb, &high, 1);
fail |= lowpan_fetch_skb(skb, &low, 1);
frag_info->d_size = (pattern & 7) << 8 | low;
/* remove the dispatch value and use first three bits as high value
* for the datagram size
*/
cb->d_size = (high & LOWPAN_FRAG_DGRAM_SIZE_HIGH_MASK) <<
LOWPAN_FRAG_DGRAM_SIZE_HIGH_SHIFT | low;
fail |= lowpan_fetch_skb(skb, &d_tag, 2);
frag_info->d_tag = ntohs(d_tag);
cb->d_tag = ntohs(d_tag);
if (frag_type == LOWPAN_DISPATCH_FRAGN) {
fail |= lowpan_fetch_skb(skb, &frag_info->d_offset, 1);
fail |= lowpan_fetch_skb(skb, &cb->d_offset, 1);
} else {
skb_reset_network_header(skb);
frag_info->d_offset = 0;
cb->d_offset = 0;
/* check if datagram_size has ipv6hdr on FRAG1 */
fail |= cb->d_size < sizeof(struct ipv6hdr);
/* check if we can dereference the dispatch value */
fail |= !skb->len;
}
if (unlikely(fail))
@ -351,27 +403,33 @@ static int lowpan_get_frag_info(struct sk_buff *skb, const u8 frag_type,
return 0;
}
int lowpan_frag_rcv(struct sk_buff *skb, const u8 frag_type)
int lowpan_frag_rcv(struct sk_buff *skb, u8 frag_type)
{
struct lowpan_frag_queue *fq;
struct net *net = dev_net(skb->dev);
struct lowpan_frag_info *frag_info = lowpan_cb(skb);
struct ieee802154_addr source, dest;
struct lowpan_802154_cb *cb = lowpan_802154_cb(skb);
struct ieee802154_hdr hdr;
int err;
source = mac_cb(skb)->source;
dest = mac_cb(skb)->dest;
if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0)
goto err;
err = lowpan_get_frag_info(skb, frag_type, frag_info);
err = lowpan_get_cb(skb, frag_type, cb);
if (err < 0)
goto err;
if (frag_info->d_size > IPV6_MIN_MTU) {
if (frag_type == LOWPAN_DISPATCH_FRAG1) {
err = lowpan_invoke_frag_rx_handlers(skb);
if (err == NET_RX_DROP)
goto err;
}
if (cb->d_size > IPV6_MIN_MTU) {
net_warn_ratelimited("lowpan_frag_rcv: datagram size exceeds MTU\n");
goto err;
}
fq = fq_find(net, frag_info, &source, &dest);
fq = fq_find(net, cb, &hdr.source, &hdr.dest);
if (fq != NULL) {
int ret;
@ -387,7 +445,6 @@ err:
kfree_skb(skb);
return -1;
}
EXPORT_SYMBOL(lowpan_frag_rcv);
#ifdef CONFIG_SYSCTL
static int zero;

356
net/ieee802154/6lowpan/rx.c
View File

@ -11,40 +11,99 @@
#include <linux/if_arp.h>
#include <net/6lowpan.h>
#include <net/mac802154.h>
#include <net/ieee802154_netdev.h>
#include "6lowpan_i.h"
static int lowpan_give_skb_to_device(struct sk_buff *skb,
struct net_device *dev)
#define LOWPAN_DISPATCH_FIRST 0xc0
#define LOWPAN_DISPATCH_FRAG_MASK 0xf8
#define LOWPAN_DISPATCH_NALP 0x00
#define LOWPAN_DISPATCH_ESC 0x40
#define LOWPAN_DISPATCH_HC1 0x42
#define LOWPAN_DISPATCH_DFF 0x43
#define LOWPAN_DISPATCH_BC0 0x50
#define LOWPAN_DISPATCH_MESH 0x80
static int lowpan_give_skb_to_device(struct sk_buff *skb)
{
skb->dev = dev->ieee802154_ptr->lowpan_dev;
skb->protocol = htons(ETH_P_IPV6);
skb->pkt_type = PACKET_HOST;
return netif_rx(skb);
}
static int
iphc_decompress(struct sk_buff *skb, const struct ieee802154_hdr *hdr)
static int lowpan_rx_handlers_result(struct sk_buff *skb, lowpan_rx_result res)
{
switch (res) {
case RX_CONTINUE:
/* nobody cared about this packet */
net_warn_ratelimited("%s: received unknown dispatch\n",
__func__);
/* fall-through */
case RX_DROP_UNUSABLE:
kfree_skb(skb);
/* fall-through */
case RX_DROP:
return NET_RX_DROP;
case RX_QUEUED:
return lowpan_give_skb_to_device(skb);
default:
break;
}
return NET_RX_DROP;
}
static inline bool lowpan_is_frag1(u8 dispatch)
{
return (dispatch & LOWPAN_DISPATCH_FRAG_MASK) == LOWPAN_DISPATCH_FRAG1;
}
static inline bool lowpan_is_fragn(u8 dispatch)
{
return (dispatch & LOWPAN_DISPATCH_FRAG_MASK) == LOWPAN_DISPATCH_FRAGN;
}
static lowpan_rx_result lowpan_rx_h_frag(struct sk_buff *skb)
{
int ret;
if (!(lowpan_is_frag1(*skb_network_header(skb)) ||
lowpan_is_fragn(*skb_network_header(skb))))
return RX_CONTINUE;
ret = lowpan_frag_rcv(skb, *skb_network_header(skb) &
LOWPAN_DISPATCH_FRAG_MASK);
if (ret == 1)
return RX_QUEUED;
/* Packet is freed by lowpan_frag_rcv on error or put into the frag
* bucket.
*/
return RX_DROP;
}
int lowpan_iphc_decompress(struct sk_buff *skb)
{
u8 iphc0, iphc1;
struct ieee802154_addr_sa sa, da;
struct ieee802154_hdr hdr;
u8 iphc0, iphc1;
void *sap, *dap;
if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0)
return -EINVAL;
raw_dump_table(__func__, "raw skb data dump", skb->data, skb->len);
/* at least two bytes will be used for the encoding */
if (skb->len < 2)
if (lowpan_fetch_skb_u8(skb, &iphc0) ||
lowpan_fetch_skb_u8(skb, &iphc1))
return -EINVAL;
if (lowpan_fetch_skb_u8(skb, &iphc0))
return -EINVAL;
if (lowpan_fetch_skb_u8(skb, &iphc1))
return -EINVAL;
ieee802154_addr_to_sa(&sa, &hdr->source);
ieee802154_addr_to_sa(&da, &hdr->dest);
ieee802154_addr_to_sa(&sa, &hdr.source);
ieee802154_addr_to_sa(&da, &hdr.dest);
if (sa.addr_type == IEEE802154_ADDR_SHORT)
sap = &sa.short_addr;
@ -61,77 +120,216 @@ iphc_decompress(struct sk_buff *skb, const struct ieee802154_hdr *hdr)
IEEE802154_ADDR_LEN, iphc0, iphc1);
}
static int lowpan_rcv(struct sk_buff *skb, struct net_device *dev,
struct packet_type *pt, struct net_device *orig_dev)
static lowpan_rx_result lowpan_rx_h_iphc(struct sk_buff *skb)
{
struct ieee802154_hdr hdr;
int ret;
if (dev->type != ARPHRD_IEEE802154 ||
!dev->ieee802154_ptr->lowpan_dev)
goto drop;
if (!lowpan_is_iphc(*skb_network_header(skb)))
return RX_CONTINUE;
/* Setting datagram_offset to zero indicates non frag handling
* while doing lowpan_header_decompress.
*/
lowpan_802154_cb(skb)->d_size = 0;
ret = lowpan_iphc_decompress(skb);
if (ret < 0)
return RX_DROP_UNUSABLE;
return RX_QUEUED;
}
lowpan_rx_result lowpan_rx_h_ipv6(struct sk_buff *skb)
{
if (!lowpan_is_ipv6(*skb_network_header(skb)))
return RX_CONTINUE;
/* Pull off the 1-byte of 6lowpan header. */
skb_pull(skb, 1);
return RX_QUEUED;
}
static inline bool lowpan_is_esc(u8 dispatch)
{
return dispatch == LOWPAN_DISPATCH_ESC;
}
static lowpan_rx_result lowpan_rx_h_esc(struct sk_buff *skb)
{
if (!lowpan_is_esc(*skb_network_header(skb)))
return RX_CONTINUE;
net_warn_ratelimited("%s: %s\n", skb->dev->name,
"6LoWPAN ESC not supported\n");
return RX_DROP_UNUSABLE;
}
static inline bool lowpan_is_hc1(u8 dispatch)
{
return dispatch == LOWPAN_DISPATCH_HC1;
}
static lowpan_rx_result lowpan_rx_h_hc1(struct sk_buff *skb)
{
if (!lowpan_is_hc1(*skb_network_header(skb)))
return RX_CONTINUE;
net_warn_ratelimited("%s: %s\n", skb->dev->name,
"6LoWPAN HC1 not supported\n");
return RX_DROP_UNUSABLE;
}
static inline bool lowpan_is_dff(u8 dispatch)
{
return dispatch == LOWPAN_DISPATCH_DFF;
}
static lowpan_rx_result lowpan_rx_h_dff(struct sk_buff *skb)
{
if (!lowpan_is_dff(*skb_network_header(skb)))
return RX_CONTINUE;
net_warn_ratelimited("%s: %s\n", skb->dev->name,
"6LoWPAN DFF not supported\n");
return RX_DROP_UNUSABLE;
}
static inline bool lowpan_is_bc0(u8 dispatch)
{
return dispatch == LOWPAN_DISPATCH_BC0;
}
static lowpan_rx_result lowpan_rx_h_bc0(struct sk_buff *skb)
{
if (!lowpan_is_bc0(*skb_network_header(skb)))
return RX_CONTINUE;
net_warn_ratelimited("%s: %s\n", skb->dev->name,
"6LoWPAN BC0 not supported\n");
return RX_DROP_UNUSABLE;
}
static inline bool lowpan_is_mesh(u8 dispatch)
{
return (dispatch & LOWPAN_DISPATCH_FIRST) == LOWPAN_DISPATCH_MESH;
}
static lowpan_rx_result lowpan_rx_h_mesh(struct sk_buff *skb)
{
if (!lowpan_is_mesh(*skb_network_header(skb)))
return RX_CONTINUE;
net_warn_ratelimited("%s: %s\n", skb->dev->name,
"6LoWPAN MESH not supported\n");
return RX_DROP_UNUSABLE;
}
static int lowpan_invoke_rx_handlers(struct sk_buff *skb)
{
lowpan_rx_result res;
#define CALL_RXH(rxh) \
do { \
res = rxh(skb); \
if (res != RX_CONTINUE) \
goto rxh_next; \
} while (0)
/* likely at first */
CALL_RXH(lowpan_rx_h_iphc);
CALL_RXH(lowpan_rx_h_frag);
CALL_RXH(lowpan_rx_h_ipv6);
CALL_RXH(lowpan_rx_h_esc);
CALL_RXH(lowpan_rx_h_hc1);
CALL_RXH(lowpan_rx_h_dff);
CALL_RXH(lowpan_rx_h_bc0);
CALL_RXH(lowpan_rx_h_mesh);
rxh_next:
return lowpan_rx_handlers_result(skb, res);
#undef CALL_RXH
}
static inline bool lowpan_is_nalp(u8 dispatch)
{
return (dispatch & LOWPAN_DISPATCH_FIRST) == LOWPAN_DISPATCH_NALP;
}
/* Lookup for reserved dispatch values at:
* https://www.iana.org/assignments/_6lowpan-parameters/_6lowpan-parameters.xhtml#_6lowpan-parameters-1
*
* Last Updated: 2015-01-22
*/
static inline bool lowpan_is_reserved(u8 dispatch)
{
return ((dispatch >= 0x44 && dispatch <= 0x4F) ||
(dispatch >= 0x51 && dispatch <= 0x5F) ||
(dispatch >= 0xc8 && dispatch <= 0xdf) ||
(dispatch >= 0xe8 && dispatch <= 0xff));
}
/* lowpan_rx_h_check checks on generic 6LoWPAN requirements
* in MAC and 6LoWPAN header.
*
* Don't manipulate the skb here, it could be shared buffer.
*/
static inline bool lowpan_rx_h_check(struct sk_buff *skb)
{
__le16 fc = ieee802154_get_fc_from_skb(skb);
/* check on ieee802154 conform 6LoWPAN header */
if (!ieee802154_is_data(fc) ||
!ieee802154_is_intra_pan(fc))
return false;
/* check if we can dereference the dispatch */
if (unlikely(!skb->len))
return false;
if (lowpan_is_nalp(*skb_network_header(skb)) ||
lowpan_is_reserved(*skb_network_header(skb)))
return false;
return true;
}
static int lowpan_rcv(struct sk_buff *skb, struct net_device *wdev,
struct packet_type *pt, struct net_device *orig_wdev)
{
struct net_device *ldev;
if (wdev->type != ARPHRD_IEEE802154 ||
skb->pkt_type == PACKET_OTHERHOST ||
!lowpan_rx_h_check(skb))
return NET_RX_DROP;
ldev = wdev->ieee802154_ptr->lowpan_dev;
if (!ldev || !netif_running(ldev))
return NET_RX_DROP;
/* Replacing skb->dev and followed rx handlers will manipulate skb. */
skb = skb_share_check(skb, GFP_ATOMIC);
if (!skb)
goto drop;
return NET_RX_DROP;
skb->dev = ldev;
if (!netif_running(dev))
goto drop_skb;
if (skb->pkt_type == PACKET_OTHERHOST)
goto drop_skb;
if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0)
goto drop_skb;
/* check that it's our buffer */
if (skb->data[0] == LOWPAN_DISPATCH_IPV6) {
/* Pull off the 1-byte of 6lowpan header. */
skb_pull(skb, 1);
return lowpan_give_skb_to_device(skb, dev);
} else {
switch (skb->data[0] & 0xe0) {
case LOWPAN_DISPATCH_IPHC: /* ipv6 datagram */
ret = iphc_decompress(skb, &hdr);
if (ret < 0)
goto drop_skb;
return lowpan_give_skb_to_device(skb, dev);
case LOWPAN_DISPATCH_FRAG1: /* first fragment header */
ret = lowpan_frag_rcv(skb, LOWPAN_DISPATCH_FRAG1);
if (ret == 1) {
ret = iphc_decompress(skb, &hdr);
if (ret < 0)
goto drop_skb;
return lowpan_give_skb_to_device(skb, dev);
} else if (ret == -1) {
return NET_RX_DROP;
} else {
return NET_RX_SUCCESS;
}
case LOWPAN_DISPATCH_FRAGN: /* next fragments headers */
ret = lowpan_frag_rcv(skb, LOWPAN_DISPATCH_FRAGN);
if (ret == 1) {
ret = iphc_decompress(skb, &hdr);
if (ret < 0)
goto drop_skb;
return lowpan_give_skb_to_device(skb, dev);
} else if (ret == -1) {
return NET_RX_DROP;
} else {
return NET_RX_SUCCESS;
}
default:
break;
}
/* When receive frag1 it's likely that we manipulate the buffer.
* When recevie iphc we manipulate the data buffer. So we need
* to unshare the buffer.
*/
if (lowpan_is_frag1(*skb_network_header(skb)) ||
lowpan_is_iphc(*skb_network_header(skb))) {
skb = skb_unshare(skb, GFP_ATOMIC);
if (!skb)
return NET_RX_DROP;
}
drop_skb:
kfree_skb(skb);
drop:
return NET_RX_DROP;
return lowpan_invoke_rx_handlers(skb);
}
static struct packet_type lowpan_packet_type = {

51
net/ieee802154/6lowpan/tx.c
View File

@ -36,7 +36,7 @@ lowpan_addr_info *lowpan_skb_priv(const struct sk_buff *skb)
sizeof(struct lowpan_addr_info));
}
int lowpan_header_create(struct sk_buff *skb, struct net_device *dev,
int lowpan_header_create(struct sk_buff *skb, struct net_device *ldev,
unsigned short type, const void *_daddr,
const void *_saddr, unsigned int len)
{
@ -51,7 +51,7 @@ int lowpan_header_create(struct sk_buff *skb, struct net_device *dev,
return 0;
if (!saddr)
saddr = dev->dev_addr;
saddr = ldev->dev_addr;
raw_dump_inline(__func__, "saddr", (unsigned char *)saddr, 8);
raw_dump_inline(__func__, "daddr", (unsigned char *)daddr, 8);
@ -73,22 +73,21 @@ static struct sk_buff*
lowpan_alloc_frag(struct sk_buff *skb, int size,
const struct ieee802154_hdr *master_hdr)
{
struct net_device *real_dev = lowpan_dev_info(skb->dev)->real_dev;
struct net_device *wdev = lowpan_dev_info(skb->dev)->wdev;
struct sk_buff *frag;
int rc;
frag = alloc_skb(real_dev->hard_header_len +
real_dev->needed_tailroom + size,
frag = alloc_skb(wdev->hard_header_len + wdev->needed_tailroom + size,
GFP_ATOMIC);
if (likely(frag)) {
frag->dev = real_dev;
frag->dev = wdev;
frag->priority = skb->priority;
skb_reserve(frag, real_dev->hard_header_len);
skb_reserve(frag, wdev->hard_header_len);
skb_reset_network_header(frag);
*mac_cb(frag) = *mac_cb(skb);
rc = dev_hard_header(frag, real_dev, 0, &master_hdr->dest,
rc = dev_hard_header(frag, wdev, 0, &master_hdr->dest,
&master_hdr->source, size);
if (rc < 0) {
kfree_skb(frag);
@ -123,19 +122,17 @@ lowpan_xmit_fragment(struct sk_buff *skb, const struct ieee802154_hdr *wpan_hdr,
}
static int
lowpan_xmit_fragmented(struct sk_buff *skb, struct net_device *dev,
const struct ieee802154_hdr *wpan_hdr)
lowpan_xmit_fragmented(struct sk_buff *skb, struct net_device *ldev,
const struct ieee802154_hdr *wpan_hdr, u16 dgram_size,
u16 dgram_offset)
{
u16 dgram_size, dgram_offset;
__be16 frag_tag;
u8 frag_hdr[5];
int frag_cap, frag_len, payload_cap, rc;
int skb_unprocessed, skb_offset;
dgram_size = lowpan_uncompress_size(skb, &dgram_offset) -
skb->mac_len;
frag_tag = htons(lowpan_dev_info(dev)->fragment_tag);
lowpan_dev_info(dev)->fragment_tag++;
frag_tag = htons(lowpan_dev_info(ldev)->fragment_tag);
lowpan_dev_info(ldev)->fragment_tag++;
frag_hdr[0] = LOWPAN_DISPATCH_FRAG1 | ((dgram_size >> 8) & 0x07);
frag_hdr[1] = dgram_size & 0xff;
@ -188,9 +185,10 @@ err:
return rc;
}
static int lowpan_header(struct sk_buff *skb, struct net_device *dev)
static int lowpan_header(struct sk_buff *skb, struct net_device *ldev,
u16 *dgram_size, u16 *dgram_offset)
{
struct wpan_dev *wpan_dev = lowpan_dev_info(dev)->real_dev->ieee802154_ptr;
struct wpan_dev *wpan_dev = lowpan_dev_info(ldev)->wdev->ieee802154_ptr;
struct ieee802154_addr sa, da;
struct ieee802154_mac_cb *cb = mac_cb_init(skb);
struct lowpan_addr_info info;
@ -202,7 +200,10 @@ static int lowpan_header(struct sk_buff *skb, struct net_device *dev)
daddr = &info.daddr.u.extended_addr;
saddr = &info.saddr.u.extended_addr;
lowpan_header_compress(skb, dev, ETH_P_IPV6, daddr, saddr, skb->len);
*dgram_size = skb->len;
lowpan_header_compress(skb, ldev, ETH_P_IPV6, daddr, saddr, skb->len);
/* dgram_offset = (saved bytes after compression) + lowpan header len */
*dgram_offset = (*dgram_size - skb->len) + skb_network_header_len(skb);
cb->type = IEEE802154_FC_TYPE_DATA;
@ -227,14 +228,15 @@ static int lowpan_header(struct sk_buff *skb, struct net_device *dev)
cb->ackreq = wpan_dev->ackreq;
}
return dev_hard_header(skb, lowpan_dev_info(dev)->real_dev,
ETH_P_IPV6, (void *)&da, (void *)&sa, 0);
return dev_hard_header(skb, lowpan_dev_info(ldev)->wdev, ETH_P_IPV6,
(void *)&da, (void *)&sa, 0);
}
netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *dev)
netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *ldev)
{
struct ieee802154_hdr wpan_hdr;
int max_single, ret;
u16 dgram_size, dgram_offset;
pr_debug("package xmit\n");
@ -245,7 +247,7 @@ netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *dev)
if (!skb)
return NET_XMIT_DROP;
ret = lowpan_header(skb, dev);
ret = lowpan_header(skb, ldev, &dgram_size, &dgram_offset);
if (ret < 0) {
kfree_skb(skb);
return NET_XMIT_DROP;
@ -259,13 +261,14 @@ netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *dev)
max_single = ieee802154_max_payload(&wpan_hdr);
if (skb_tail_pointer(skb) - skb_network_header(skb) <= max_single) {
skb->dev = lowpan_dev_info(dev)->real_dev;
skb->dev = lowpan_dev_info(ldev)->wdev;
return dev_queue_xmit(skb);
} else {
netdev_tx_t rc;
pr_debug("frame is too big, fragmentation is needed\n");
rc = lowpan_xmit_fragmented(skb, dev, &wpan_hdr);
rc = lowpan_xmit_fragmented(skb, ldev, &wpan_hdr, dgram_size,
dgram_offset);
return rc < 0 ? NET_XMIT_DROP : rc;
}