Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 409 insertions, 0 deletions

diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00usb.h b/drivers/net/wireless/ralink/rt2x00/rt2x00usb.h
new file mode 100644
index 000000000..f14e16a6a
--- /dev/null
+++ b/drivers/net/wireless/ralink/rt2x00/rt2x00usb.h
@@ -0,0 +1,409 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
+	<http://rt2x00.serialmonkey.com>
+
+ */
+
+/*
+	Module: rt2x00usb
+	Abstract: Data structures for the rt2x00usb module.
+ */
+
+#ifndef RT2X00USB_H
+#define RT2X00USB_H
+
+#include <linux/usb.h>
+
+#define to_usb_device_intf(d) \
+({ \
+	struct usb_interface *intf = to_usb_interface(d); \
+	interface_to_usbdev(intf); \
+})
+
+/*
+ * For USB vendor requests we need to pass a timeout time in ms, for this we
+ * use the REGISTER_TIMEOUT, however when loading firmware or read EEPROM
+ * a higher value is required. In that case we use the REGISTER_TIMEOUT_FIRMWARE
+ * and EEPROM_TIMEOUT.
+ */
+#define REGISTER_TIMEOUT		100
+#define REGISTER_TIMEOUT_FIRMWARE	1000
+#define EEPROM_TIMEOUT			2000
+
+/*
+ * Cache size
+ */
+#define CSR_CACHE_SIZE			64
+
+/*
+ * USB request types.
+ */
+#define USB_VENDOR_REQUEST	( USB_TYPE_VENDOR | USB_RECIP_DEVICE )
+#define USB_VENDOR_REQUEST_IN	( USB_DIR_IN | USB_VENDOR_REQUEST )
+#define USB_VENDOR_REQUEST_OUT	( USB_DIR_OUT | USB_VENDOR_REQUEST )
+
+/**
+ * enum rt2x00usb_vendor_request: USB vendor commands.
+ */
+enum rt2x00usb_vendor_request {
+	USB_DEVICE_MODE = 1,
+	USB_SINGLE_WRITE = 2,
+	USB_SINGLE_READ = 3,
+	USB_MULTI_WRITE = 6,
+	USB_MULTI_READ = 7,
+	USB_EEPROM_WRITE = 8,
+	USB_EEPROM_READ = 9,
+	USB_LED_CONTROL = 10, /* RT73USB */
+	USB_RX_CONTROL = 12,
+};
+
+/**
+ * enum rt2x00usb_mode_offset: Device modes offset.
+ */
+enum rt2x00usb_mode_offset {
+	USB_MODE_RESET = 1,
+	USB_MODE_UNPLUG = 2,
+	USB_MODE_FUNCTION = 3,
+	USB_MODE_TEST = 4,
+	USB_MODE_SLEEP = 7,	/* RT73USB */
+	USB_MODE_FIRMWARE = 8,	/* RT73USB */
+	USB_MODE_WAKEUP = 9,	/* RT73USB */
+	USB_MODE_AUTORUN = 17, /* RT2800USB */
+};
+
+/**
+ * rt2x00usb_vendor_request - Send register command to device
+ * @rt2x00dev: Pointer to &struct rt2x00_dev
+ * @request: USB vendor command (See &enum rt2x00usb_vendor_request)
+ * @requesttype: Request type &USB_VENDOR_REQUEST_*
+ * @offset: Register offset to perform action on
+ * @value: Value to write to device
+ * @buffer: Buffer where information will be read/written to by device
+ * @buffer_length: Size of &buffer
+ * @timeout: Operation timeout
+ *
+ * This is the main function to communicate with the device,
+ * the &buffer argument _must_ either be NULL or point to
+ * a buffer allocated by kmalloc. Failure to do so can lead
+ * to unexpected behavior depending on the architecture.
+ */
+int rt2x00usb_vendor_request(struct rt2x00_dev *rt2x00dev,
+			     const u8 request, const u8 requesttype,
+			     const u16 offset, const u16 value,
+			     void *buffer, const u16 buffer_length,
+			     const int timeout);
+
+/**
+ * rt2x00usb_vendor_request_buff - Send register command to device (buffered)
+ * @rt2x00dev: Pointer to &struct rt2x00_dev
+ * @request: USB vendor command (See &enum rt2x00usb_vendor_request)
+ * @requesttype: Request type &USB_VENDOR_REQUEST_*
+ * @offset: Register offset to perform action on
+ * @buffer: Buffer where information will be read/written to by device
+ * @buffer_length: Size of &buffer
+ *
+ * This function will use a previously with kmalloc allocated cache
+ * to communicate with the device. The contents of the buffer pointer
+ * will be copied to this cache when writing, or read from the cache
+ * when reading.
+ * Buffers send to &rt2x00usb_vendor_request _must_ be allocated with
+ * kmalloc. Hence the reason for using a previously allocated cache
+ * which has been allocated properly.
+ */
+int rt2x00usb_vendor_request_buff(struct rt2x00_dev *rt2x00dev,
+				  const u8 request, const u8 requesttype,
+				  const u16 offset, void *buffer,
+				  const u16 buffer_length);
+
+/**
+ * rt2x00usb_vendor_request_buff - Send register command to device (buffered)
+ * @rt2x00dev: Pointer to &struct rt2x00_dev
+ * @request: USB vendor command (See &enum rt2x00usb_vendor_request)
+ * @requesttype: Request type &USB_VENDOR_REQUEST_*
+ * @offset: Register offset to perform action on
+ * @buffer: Buffer where information will be read/written to by device
+ * @buffer_length: Size of &buffer
+ * @timeout: Operation timeout
+ *
+ * A version of &rt2x00usb_vendor_request_buff which must be called
+ * if the usb_cache_mutex is already held.
+ */
+int rt2x00usb_vendor_req_buff_lock(struct rt2x00_dev *rt2x00dev,
+				   const u8 request, const u8 requesttype,
+				   const u16 offset, void *buffer,
+				   const u16 buffer_length, const int timeout);
+
+/**
+ * rt2x00usb_vendor_request_sw - Send single register command to device
+ * @rt2x00dev: Pointer to &struct rt2x00_dev
+ * @request: USB vendor command (See &enum rt2x00usb_vendor_request)
+ * @offset: Register offset to perform action on
+ * @value: Value to write to device
+ * @timeout: Operation timeout
+ *
+ * Simple wrapper around rt2x00usb_vendor_request to write a single
+ * command to the device. Since we don't use the buffer argument we
+ * don't have to worry about kmalloc here.
+ */
+static inline int rt2x00usb_vendor_request_sw(struct rt2x00_dev *rt2x00dev,
+					      const u8 request,
+					      const u16 offset,
+					      const u16 value,
+					      const int timeout)
+{
+	return rt2x00usb_vendor_request(rt2x00dev, request,
+					USB_VENDOR_REQUEST_OUT, offset,
+					value, NULL, 0, timeout);
+}
+
+/**
+ * rt2x00usb_eeprom_read - Read eeprom from device
+ * @rt2x00dev: Pointer to &struct rt2x00_dev
+ * @eeprom: Pointer to eeprom array to store the information in
+ * @length: Number of bytes to read from the eeprom
+ *
+ * Simple wrapper around rt2x00usb_vendor_request to read the eeprom
+ * from the device. Note that the eeprom argument _must_ be allocated using
+ * kmalloc for correct handling inside the kernel USB layer.
+ */
+static inline int rt2x00usb_eeprom_read(struct rt2x00_dev *rt2x00dev,
+					__le16 *eeprom, const u16 length)
+{
+	return rt2x00usb_vendor_request(rt2x00dev, USB_EEPROM_READ,
+					USB_VENDOR_REQUEST_IN, 0, 0,
+					eeprom, length, EEPROM_TIMEOUT);
+}
+
+/**
+ * rt2x00usb_register_read - Read 32bit register word
+ * @rt2x00dev: Device pointer, see &struct rt2x00_dev.
+ * @offset: Register offset
+ *
+ * This function is a simple wrapper for 32bit register access
+ * through rt2x00usb_vendor_request_buff().
+ */
+static inline u32 rt2x00usb_register_read(struct rt2x00_dev *rt2x00dev,
+					  const unsigned int offset)
+{
+	__le32 reg = 0;
+	rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_READ,
+				      USB_VENDOR_REQUEST_IN, offset,
+				      &reg, sizeof(reg));
+	return le32_to_cpu(reg);
+}
+
+/**
+ * rt2x00usb_register_read_lock - Read 32bit register word
+ * @rt2x00dev: Device pointer, see &struct rt2x00_dev.
+ * @offset: Register offset
+ *
+ * This function is a simple wrapper for 32bit register access
+ * through rt2x00usb_vendor_req_buff_lock().
+ */
+static inline u32 rt2x00usb_register_read_lock(struct rt2x00_dev *rt2x00dev,
+					       const unsigned int offset)
+{
+	__le32 reg = 0;
+	rt2x00usb_vendor_req_buff_lock(rt2x00dev, USB_MULTI_READ,
+				       USB_VENDOR_REQUEST_IN, offset,
+				       &reg, sizeof(reg), REGISTER_TIMEOUT);
+	return le32_to_cpu(reg);
+}
+
+/**
+ * rt2x00usb_register_multiread - Read 32bit register words
+ * @rt2x00dev: Device pointer, see &struct rt2x00_dev.
+ * @offset: Register offset
+ * @value: Pointer to where register contents should be stored
+ * @length: Length of the data
+ *
+ * This function is a simple wrapper for 32bit register access
+ * through rt2x00usb_vendor_request_buff().
+ */
+static inline void rt2x00usb_register_multiread(struct rt2x00_dev *rt2x00dev,
+						const unsigned int offset,
+						void *value, const u32 length)
+{
+	rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_READ,
+				      USB_VENDOR_REQUEST_IN, offset,
+				      value, length);
+}
+
+/**
+ * rt2x00usb_register_write - Write 32bit register word
+ * @rt2x00dev: Device pointer, see &struct rt2x00_dev.
+ * @offset: Register offset
+ * @value: Data which should be written
+ *
+ * This function is a simple wrapper for 32bit register access
+ * through rt2x00usb_vendor_request_buff().
+ */
+static inline void rt2x00usb_register_write(struct rt2x00_dev *rt2x00dev,
+					    const unsigned int offset,
+					    u32 value)
+{
+	__le32 reg = cpu_to_le32(value);
+	rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_WRITE,
+				      USB_VENDOR_REQUEST_OUT, offset,
+				      &reg, sizeof(reg));
+}
+
+/**
+ * rt2x00usb_register_write_lock - Write 32bit register word
+ * @rt2x00dev: Device pointer, see &struct rt2x00_dev.
+ * @offset: Register offset
+ * @value: Data which should be written
+ *
+ * This function is a simple wrapper for 32bit register access
+ * through rt2x00usb_vendor_req_buff_lock().
+ */
+static inline void rt2x00usb_register_write_lock(struct rt2x00_dev *rt2x00dev,
+						 const unsigned int offset,
+						 u32 value)
+{
+	__le32 reg = cpu_to_le32(value);
+	rt2x00usb_vendor_req_buff_lock(rt2x00dev, USB_MULTI_WRITE,
+				       USB_VENDOR_REQUEST_OUT, offset,
+				       &reg, sizeof(reg), REGISTER_TIMEOUT);
+}
+
+/**
+ * rt2x00usb_register_multiwrite - Write 32bit register words
+ * @rt2x00dev: Device pointer, see &struct rt2x00_dev.
+ * @offset: Register offset
+ * @value: Data which should be written
+ * @length: Length of the data
+ *
+ * This function is a simple wrapper for 32bit register access
+ * through rt2x00usb_vendor_request_buff().
+ */
+static inline void rt2x00usb_register_multiwrite(struct rt2x00_dev *rt2x00dev,
+						 const unsigned int offset,
+						 const void *value,
+						 const u32 length)
+{
+	rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_WRITE,
+				      USB_VENDOR_REQUEST_OUT, offset,
+				      (void *)value, length);
+}
+
+/**
+ * rt2x00usb_regbusy_read - Read from register with busy check
+ * @rt2x00dev: Device pointer, see &struct rt2x00_dev.
+ * @offset: Register offset
+ * @field: Field to check if register is busy
+ * @reg: Pointer to where register contents should be stored
+ *
+ * This function will read the given register, and checks if the
+ * register is busy. If it is, it will sleep for a couple of
+ * microseconds before reading the register again. If the register
+ * is not read after a certain timeout, this function will return
+ * FALSE.
+ */
+int rt2x00usb_regbusy_read(struct rt2x00_dev *rt2x00dev,
+			   const unsigned int offset,
+			   const struct rt2x00_field32 field,
+			   u32 *reg);
+
+/**
+ * rt2x00usb_register_read_async - Asynchronously read 32bit register word
+ * @rt2x00dev: Device pointer, see &struct rt2x00_dev.
+ * @offset: Register offset
+ * @callback: Functon to call when read completes.
+ *
+ * Submit a control URB to read a 32bit register. This safe to
+ * be called from atomic context.  The callback will be called
+ * when the URB completes. Otherwise the function is similar
+ * to rt2x00usb_register_read().
+ * When the callback function returns false, the memory will be cleaned up,
+ * when it returns true, the urb will be fired again.
+ */
+void rt2x00usb_register_read_async(struct rt2x00_dev *rt2x00dev,
+				   const unsigned int offset,
+				   bool (*callback)(struct rt2x00_dev*, int, u32));
+
+/*
+ * Radio handlers
+ */
+void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev);
+
+/**
+ * struct queue_entry_priv_usb: Per entry USB specific information
+ *
+ * @urb: Urb structure used for device communication.
+ */
+struct queue_entry_priv_usb {
+	struct urb *urb;
+};
+
+/**
+ * struct queue_entry_priv_usb_bcn: Per TX entry USB specific information
+ *
+ * The first section should match &struct queue_entry_priv_usb exactly.
+ * rt2500usb can use this structure to send a guardian byte when working
+ * with beacons.
+ *
+ * @urb: Urb structure used for device communication.
+ * @guardian_data: Set to 0, used for sending the guardian data.
+ * @guardian_urb: Urb structure used to send the guardian data.
+ */
+struct queue_entry_priv_usb_bcn {
+	struct urb *urb;
+
+	unsigned int guardian_data;
+	struct urb *guardian_urb;
+};
+
+/**
+ * rt2x00usb_kick_queue - Kick data queue
+ * @queue: Data queue to kick
+ *
+ * This will walk through all entries of the queue and push all pending
+ * frames to the hardware as a single burst.
+ */
+void rt2x00usb_kick_queue(struct data_queue *queue);
+
+/**
+ * rt2x00usb_flush_queue - Flush data queue
+ * @queue: Data queue to stop
+ * @drop: True to drop all pending frames.
+ *
+ * This will walk through all entries of the queue and will optionally
+ * kill all URB's which were send to the device, or at least wait until
+ * they have been returned from the device..
+ */
+void rt2x00usb_flush_queue(struct data_queue *queue, bool drop);
+
+/**
+ * rt2x00usb_watchdog - Watchdog for USB communication
+ * @rt2x00dev: Pointer to &struct rt2x00_dev
+ *
+ * Check the health of the USB communication and determine
+ * if timeouts have occurred. If this is the case, this function
+ * will reset all communication to restore functionality again.
+ */
+void rt2x00usb_watchdog(struct rt2x00_dev *rt2x00dev);
+
+/*
+ * Device initialization handlers.
+ */
+void rt2x00usb_clear_entry(struct queue_entry *entry);
+int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev);
+void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev);
+
+/*
+ * USB driver handlers.
+ */
+int rt2x00usb_probe(struct usb_interface *usb_intf,
+		    const struct rt2x00_ops *ops);
+void rt2x00usb_disconnect(struct usb_interface *usb_intf);
+#ifdef CONFIG_PM
+int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state);
+int rt2x00usb_resume(struct usb_interface *usb_intf);
+#else
+#define rt2x00usb_suspend	NULL
+#define rt2x00usb_resume	NULL
+#endif /* CONFIG_PM */
+
+#endif /* RT2X00USB_H */