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, 218 insertions, 0 deletions

diff --git a/Documentation/userspace-api/media/v4l/vidioc-decoder-cmd.rst b/Documentation/userspace-api/media/v4l/vidioc-decoder-cmd.rst
new file mode 100644
index 000000000..7ccae3b91
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-decoder-cmd.rst
@@ -0,0 +1,218 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_DECODER_CMD:
+
+************************************************
+ioctl VIDIOC_DECODER_CMD, VIDIOC_TRY_DECODER_CMD
+************************************************
+
+Name
+====
+
+VIDIOC_DECODER_CMD - VIDIOC_TRY_DECODER_CMD - Execute an decoder command
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_DECODER_CMD
+
+``int ioctl(int fd, VIDIOC_DECODER_CMD, struct v4l2_decoder_cmd *argp)``
+
+.. c:macro:: VIDIOC_TRY_DECODER_CMD
+
+``int ioctl(int fd, VIDIOC_TRY_DECODER_CMD, struct v4l2_decoder_cmd *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    pointer to struct :c:type:`v4l2_decoder_cmd`.
+
+Description
+===========
+
+These ioctls control an audio/video (usually MPEG-) decoder.
+``VIDIOC_DECODER_CMD`` sends a command to the decoder,
+``VIDIOC_TRY_DECODER_CMD`` can be used to try a command without actually
+executing it. To send a command applications must initialize all fields
+of a struct :c:type:`v4l2_decoder_cmd` and call
+``VIDIOC_DECODER_CMD`` or ``VIDIOC_TRY_DECODER_CMD`` with a pointer to
+this structure.
+
+The ``cmd`` field must contain the command code. Some commands use the
+``flags`` field for additional information.
+
+A :c:func:`write()` or :ref:`VIDIOC_STREAMON`
+call sends an implicit START command to the decoder if it has not been
+started yet. Applies to both queues of mem2mem decoders.
+
+A :c:func:`close()` or :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>`
+call of a streaming file descriptor sends an implicit immediate STOP
+command to the decoder, and all buffered data is discarded. Applies to both
+queues of mem2mem decoders.
+
+In principle, these ioctls are optional, not all drivers may support them. They were
+introduced in Linux 3.3. They are, however, mandatory for stateful mem2mem decoders
+(as further documented in :ref:`decoder`).
+
+.. tabularcolumns:: |p{2.0cm}|p{1.1cm}|p{2.2cm}|p{11.8cm}|
+
+.. c:type:: v4l2_decoder_cmd
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_decoder_cmd
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 1 1 1 3
+
+    * - __u32
+      - ``cmd``
+      -
+      - The decoder command, see :ref:`decoder-cmds`.
+    * - __u32
+      - ``flags``
+      -
+      - Flags to go with the command. If no flags are defined for this
+	command, drivers and applications must set this field to zero.
+    * - union {
+      - (anonymous)
+    * - struct
+      - ``start``
+      -
+      - Structure containing additional data for the
+	``V4L2_DEC_CMD_START`` command.
+    * -
+      - __s32
+      - ``speed``
+      - Playback speed and direction. The playback speed is defined as
+	``speed``/1000 of the normal speed. So 1000 is normal playback.
+	Negative numbers denote reverse playback, so -1000 does reverse
+	playback at normal speed. Speeds -1, 0 and 1 have special
+	meanings: speed 0 is shorthand for 1000 (normal playback). A speed
+	of 1 steps just one frame forward, a speed of -1 steps just one
+	frame back.
+    * -
+      - __u32
+      - ``format``
+      - Format restrictions. This field is set by the driver, not the
+	application. Possible values are ``V4L2_DEC_START_FMT_NONE`` if
+	there are no format restrictions or ``V4L2_DEC_START_FMT_GOP`` if
+	the decoder operates on full GOPs (*Group Of Pictures*). This is
+	usually the case for reverse playback: the decoder needs full
+	GOPs, which it can then play in reverse order. So to implement
+	reverse playback the application must feed the decoder the last
+	GOP in the video file, then the GOP before that, etc. etc.
+    * - struct
+      - ``stop``
+      -
+      - Structure containing additional data for the ``V4L2_DEC_CMD_STOP``
+	command.
+    * -
+      - __u64
+      - ``pts``
+      - Stop playback at this ``pts`` or immediately if the playback is
+	already past that timestamp. Leave to 0 if you want to stop after
+	the last frame was decoded.
+    * - struct
+      - ``raw``
+    * -
+      - __u32
+      - ``data``\ [16]
+      - Reserved for future extensions. Drivers and applications must set
+	the array to zero.
+    * - }
+      -
+
+
+.. tabularcolumns:: |p{5.6cm}|p{0.6cm}|p{11.1cm}|
+
+.. cssclass:: longtable
+
+.. _decoder-cmds:
+
+.. flat-table:: Decoder Commands
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 56 6 113
+
+    * - ``V4L2_DEC_CMD_START``
+      - 0
+      - Start the decoder. When the decoder is already running or paused,
+	this command will just change the playback speed. That means that
+	calling ``V4L2_DEC_CMD_START`` when the decoder was paused will
+	*not* resume the decoder. You have to explicitly call
+	``V4L2_DEC_CMD_RESUME`` for that. This command has one flag:
+	``V4L2_DEC_CMD_START_MUTE_AUDIO``. If set, then audio will be
+	muted when playing back at a non-standard speed.
+
+	For a device implementing the :ref:`decoder`, once the drain sequence
+	is initiated with the ``V4L2_DEC_CMD_STOP`` command, it must be driven
+	to completion before this command can be invoked.  Any attempt to
+	invoke the command while the drain sequence is in progress will trigger
+	an ``EBUSY`` error code.  The command may be also used to restart the
+	decoder in case of an implicit stop initiated by the decoder itself,
+	without the ``V4L2_DEC_CMD_STOP`` being called explicitly. See
+	:ref:`decoder` for more details.
+    * - ``V4L2_DEC_CMD_STOP``
+      - 1
+      - Stop the decoder. When the decoder is already stopped, this
+	command does nothing. This command has two flags: if
+	``V4L2_DEC_CMD_STOP_TO_BLACK`` is set, then the decoder will set
+	the picture to black after it stopped decoding. Otherwise the last
+	image will repeat. If
+	``V4L2_DEC_CMD_STOP_IMMEDIATELY`` is set, then the decoder stops
+	immediately (ignoring the ``pts`` value), otherwise it will keep
+	decoding until timestamp >= pts or until the last of the pending
+	data from its internal buffers was decoded.
+
+	For a device implementing the :ref:`decoder`, the command will initiate
+	the drain sequence as documented in :ref:`decoder`.  No flags or other
+	arguments are accepted in this case. Any attempt to invoke the command
+	again before the sequence completes will trigger an ``EBUSY`` error
+	code.
+    * - ``V4L2_DEC_CMD_PAUSE``
+      - 2
+      - Pause the decoder. When the decoder has not been started yet, the
+	driver will return an ``EPERM`` error code. When the decoder is
+	already paused, this command does nothing. This command has one
+	flag: if ``V4L2_DEC_CMD_PAUSE_TO_BLACK`` is set, then set the
+	decoder output to black when paused.
+    * - ``V4L2_DEC_CMD_RESUME``
+      - 3
+      - Resume decoding after a PAUSE command. When the decoder has not
+	been started yet, the driver will return an ``EPERM`` error code. When
+	the decoder is already running, this command does nothing. No
+	flags are defined for this command.
+    * - ``V4L2_DEC_CMD_FLUSH``
+      - 4
+      - Flush any held capture buffers. Only valid for stateless decoders.
+	This command is typically used when the application reached the
+	end of the stream and the last output buffer had the
+	``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` flag set. This would prevent
+	dequeueing the capture buffer containing the last decoded frame.
+	So this command can be used to explicitly flush that final decoded
+	frame. This command does nothing if there are no held capture buffers.
+
+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.
+
+EBUSY
+    A drain sequence of a device implementing the :ref:`decoder` is still in
+    progress. It is not allowed to issue another decoder command until it
+    completes.
+
+EINVAL
+    The ``cmd`` field is invalid.
+
+EPERM
+    The application sent a PAUSE or RESUME command when the decoder was
+    not running.