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, 377 insertions, 0 deletions

diff --git a/Documentation/userspace-api/media/v4l/vidioc-dqevent.rst b/Documentation/userspace-api/media/v4l/vidioc-dqevent.rst
new file mode 100644
index 000000000..8db103760
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-dqevent.rst
@@ -0,0 +1,377 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_DQEVENT:
+
+********************
+ioctl VIDIOC_DQEVENT
+********************
+
+Name
+====
+
+VIDIOC_DQEVENT - Dequeue event
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_DQEVENT
+
+``int ioctl(int fd, VIDIOC_DQEVENT, struct v4l2_event *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_event`.
+
+Description
+===========
+
+Dequeue an event from a video device. No input is required for this
+ioctl. All the fields of the struct :c:type:`v4l2_event`
+structure are filled by the driver. The file handle will also receive
+exceptions which the application may get by e.g. using the select system
+call.
+
+.. c:type:: v4l2_event
+
+.. tabularcolumns:: |p{3.0cm}|p{3.4cm}|p{10.9cm}|
+
+
+.. flat-table:: struct v4l2_event
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``type``
+      - Type of the event, see :ref:`event-type`.
+    * - union {
+      - ``u``
+    * - struct :c:type:`v4l2_event_vsync`
+      - ``vsync``
+      - Event data for event ``V4L2_EVENT_VSYNC``.
+    * - struct :c:type:`v4l2_event_ctrl`
+      - ``ctrl``
+      - Event data for event ``V4L2_EVENT_CTRL``.
+    * - struct :c:type:`v4l2_event_frame_sync`
+      - ``frame_sync``
+      - Event data for event ``V4L2_EVENT_FRAME_SYNC``.
+    * - struct :c:type:`v4l2_event_motion_det`
+      - ``motion_det``
+      - Event data for event V4L2_EVENT_MOTION_DET.
+    * - struct :c:type:`v4l2_event_src_change`
+      - ``src_change``
+      - Event data for event V4L2_EVENT_SOURCE_CHANGE.
+    * - __u8
+      - ``data``\ [64]
+      - Event data. Defined by the event type. The union should be used to
+	define easily accessible type for events.
+    * - }
+      -
+    * - __u32
+      - ``pending``
+      - Number of pending events excluding this one.
+    * - __u32
+      - ``sequence``
+      - Event sequence number. The sequence number is incremented for
+	every subscribed event that takes place. If sequence numbers are
+	not contiguous it means that events have been lost.
+    * - struct timespec
+      - ``timestamp``
+      - Event timestamp. The timestamp has been taken from the
+	``CLOCK_MONOTONIC`` clock. To access the same clock outside V4L2,
+	use :c:func:`clock_gettime`.
+    * - u32
+      - ``id``
+      - The ID associated with the event source. If the event does not
+	have an associated ID (this depends on the event type), then this
+	is 0.
+    * - __u32
+      - ``reserved``\ [8]
+      - Reserved for future extensions. Drivers must set the array to
+	zero.
+
+
+.. tabularcolumns:: |p{6.2cm}|p{2.6cm}|p{8.5cm}|
+
+.. cssclass:: longtable
+
+.. _event-type:
+
+.. flat-table:: Event Types
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_EVENT_ALL``
+      - 0
+      - All events. V4L2_EVENT_ALL is valid only for
+	VIDIOC_UNSUBSCRIBE_EVENT for unsubscribing all events at once.
+    * - ``V4L2_EVENT_VSYNC``
+      - 1
+      - This event is triggered on the vertical sync. This event has a
+	struct :c:type:`v4l2_event_vsync` associated
+	with it.
+    * - ``V4L2_EVENT_EOS``
+      - 2
+      - This event is triggered when the end of a stream is reached. This
+	is typically used with MPEG decoders to report to the application
+	when the last of the MPEG stream has been decoded.
+    * - ``V4L2_EVENT_CTRL``
+      - 3
+      - This event requires that the ``id`` matches the control ID from
+	which you want to receive events. This event is triggered if the
+	control's value changes, if a button control is pressed or if the
+	control's flags change. This event has a struct
+	:c:type:`v4l2_event_ctrl` associated with it.
+	This struct contains much of the same information as struct
+	:ref:`v4l2_queryctrl <v4l2-queryctrl>` and struct
+	:c:type:`v4l2_control`.
+
+	If the event is generated due to a call to
+	:ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` or
+	:ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`, then the
+	event will *not* be sent to the file handle that called the ioctl
+	function. This prevents nasty feedback loops. If you *do* want to
+	get the event, then set the ``V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK``
+	flag.
+
+	This event type will ensure that no information is lost when more
+	events are raised than there is room internally. In that case the
+	struct :c:type:`v4l2_event_ctrl` of the
+	second-oldest event is kept, but the ``changes`` field of the
+	second-oldest event is ORed with the ``changes`` field of the
+	oldest event.
+    * - ``V4L2_EVENT_FRAME_SYNC``
+      - 4
+      - Triggered immediately when the reception of a frame has begun.
+	This event has a struct
+	:c:type:`v4l2_event_frame_sync`
+	associated with it.
+
+	If the hardware needs to be stopped in the case of a buffer
+	underrun it might not be able to generate this event. In such
+	cases the ``frame_sequence`` field in struct
+	:c:type:`v4l2_event_frame_sync` will not
+	be incremented. This causes two consecutive frame sequence numbers
+	to have n times frame interval in between them.
+    * - ``V4L2_EVENT_SOURCE_CHANGE``
+      - 5
+      - This event is triggered when a source parameter change is detected
+	during runtime by the video device. It can be a runtime resolution
+	change triggered by a video decoder or the format change happening
+	on an input connector. This event requires that the ``id`` matches
+	the input index (when used with a video device node) or the pad
+	index (when used with a subdevice node) from which you want to
+	receive events.
+
+	This event has a struct
+	:c:type:`v4l2_event_src_change`
+	associated with it. The ``changes`` bitfield denotes what has
+	changed for the subscribed pad. If multiple events occurred before
+	application could dequeue them, then the changes will have the
+	ORed value of all the events generated.
+    * - ``V4L2_EVENT_MOTION_DET``
+      - 6
+      - Triggered whenever the motion detection state for one or more of
+	the regions changes. This event has a struct
+	:c:type:`v4l2_event_motion_det`
+	associated with it.
+    * - ``V4L2_EVENT_PRIVATE_START``
+      - 0x08000000
+      - Base event number for driver-private events.
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.5cm}|
+
+.. c:type:: v4l2_event_vsync
+
+.. flat-table:: struct v4l2_event_vsync
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u8
+      - ``field``
+      - The upcoming field. See enum :c:type:`v4l2_field`.
+
+
+.. tabularcolumns:: |p{3.5cm}|p{3.0cm}|p{10.8cm}|
+
+.. c:type:: v4l2_event_ctrl
+
+.. flat-table:: struct v4l2_event_ctrl
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``changes``
+      - A bitmask that tells what has changed. See
+	:ref:`ctrl-changes-flags`.
+    * - __u32
+      - ``type``
+      - The type of the control. See enum
+	:c:type:`v4l2_ctrl_type`.
+    * - union {
+      - (anonymous)
+    * - __s32
+      - ``value``
+      - The 32-bit value of the control for 32-bit control types. This is
+	0 for string controls since the value of a string cannot be passed
+	using :ref:`VIDIOC_DQEVENT`.
+    * - __s64
+      - ``value64``
+      - The 64-bit value of the control for 64-bit control types.
+    * - }
+      -
+    * - __u32
+      - ``flags``
+      - The control flags. See :ref:`control-flags`.
+    * - __s32
+      - ``minimum``
+      - The minimum value of the control. See struct
+	:ref:`v4l2_queryctrl <v4l2-queryctrl>`.
+    * - __s32
+      - ``maximum``
+      - The maximum value of the control. See struct
+	:ref:`v4l2_queryctrl <v4l2-queryctrl>`.
+    * - __s32
+      - ``step``
+      - The step value of the control. See struct
+	:ref:`v4l2_queryctrl <v4l2-queryctrl>`.
+    * - __s32
+      - ``default_value``
+      - The default value of the control. See struct
+	:ref:`v4l2_queryctrl <v4l2-queryctrl>`.
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.5cm}|
+
+.. c:type:: v4l2_event_frame_sync
+
+.. flat-table:: struct v4l2_event_frame_sync
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``frame_sequence``
+      - The sequence number of the frame being received.
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.5cm}|
+
+.. c:type:: v4l2_event_src_change
+
+.. flat-table:: struct v4l2_event_src_change
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``changes``
+      - A bitmask that tells what has changed. See
+	:ref:`src-changes-flags`.
+
+
+.. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.5cm}|
+
+.. c:type:: v4l2_event_motion_det
+
+.. flat-table:: struct v4l2_event_motion_det
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``flags``
+      - Currently only one flag is available: if
+	``V4L2_EVENT_MD_FL_HAVE_FRAME_SEQ`` is set, then the
+	``frame_sequence`` field is valid, otherwise that field should be
+	ignored.
+    * - __u32
+      - ``frame_sequence``
+      - The sequence number of the frame being received. Only valid if the
+	``V4L2_EVENT_MD_FL_HAVE_FRAME_SEQ`` flag was set.
+    * - __u32
+      - ``region_mask``
+      - The bitmask of the regions that reported motion. There is at least
+	one region. If this field is 0, then no motion was detected at
+	all. If there is no ``V4L2_CID_DETECT_MD_REGION_GRID`` control
+	(see :ref:`detect-controls`) to assign a different region to
+	each cell in the motion detection grid, then that all cells are
+	automatically assigned to the default region 0.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.5cm}|
+
+.. _ctrl-changes-flags:
+
+.. flat-table:: Control Changes
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_EVENT_CTRL_CH_VALUE``
+      - 0x0001
+      - This control event was triggered because the value of the control
+	changed. Special cases: Volatile controls do no generate this
+	event; If a control has the ``V4L2_CTRL_FLAG_EXECUTE_ON_WRITE``
+	flag set, then this event is sent as well, regardless its value.
+    * - ``V4L2_EVENT_CTRL_CH_FLAGS``
+      - 0x0002
+      - This control event was triggered because the control flags
+	changed.
+    * - ``V4L2_EVENT_CTRL_CH_RANGE``
+      - 0x0004
+      - This control event was triggered because the minimum, maximum,
+	step or the default value of the control changed.
+    * - ``V4L2_EVENT_CTRL_CH_DIMENSIONS``
+      - 0x0008
+      - This control event was triggered because the dimensions of the
+	control changed. Note that the number of dimensions remains the
+	same.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.5cm}|
+
+.. _src-changes-flags:
+
+.. flat-table:: Source Changes
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_EVENT_SRC_CH_RESOLUTION``
+      - 0x0001
+      - This event gets triggered when a resolution change is detected at
+	an input. This can come from an input connector or from a video
+	decoder. Applications will have to query the new resolution (if
+	any, the signal may also have been lost).
+
+	For stateful decoders follow the guidelines in :ref:`decoder`.
+	Video Capture devices have to query the new timings using
+	:ref:`VIDIOC_QUERY_DV_TIMINGS` or
+	:ref:`VIDIOC_QUERYSTD <VIDIOC_QUERYSTD>`.
+
+	*Important*: even if the new video timings appear identical to the old
+	ones, receiving this event indicates that there was an issue with the
+	video signal and you must stop and restart streaming
+	(:ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>`
+	followed by :ref:`VIDIOC_STREAMON <VIDIOC_STREAMON>`). The reason is
+	that many Video Capture devices are not able to recover from a temporary
+	loss of signal and so restarting streaming I/O is required in order for
+	the hardware to synchronize to the video signal.
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.