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, 503 insertions, 0 deletions

diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst b/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst
new file mode 100644
index 000000000..892cfeb8b
--- /dev/null
+++ b/Documentation/userspace-api/media/v4l/vidioc-g-ext-ctrls.rst
@@ -0,0 +1,503 @@
+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+.. c:namespace:: V4L
+
+.. _VIDIOC_G_EXT_CTRLS:
+
+******************************************************************
+ioctl VIDIOC_G_EXT_CTRLS, VIDIOC_S_EXT_CTRLS, VIDIOC_TRY_EXT_CTRLS
+******************************************************************
+
+Name
+====
+
+VIDIOC_G_EXT_CTRLS - VIDIOC_S_EXT_CTRLS - VIDIOC_TRY_EXT_CTRLS - Get or set the value of several controls, try control values
+
+Synopsis
+========
+
+.. c:macro:: VIDIOC_G_EXT_CTRLS
+
+``int ioctl(int fd, VIDIOC_G_EXT_CTRLS, struct v4l2_ext_controls *argp)``
+
+.. c:macro:: VIDIOC_S_EXT_CTRLS
+
+``int ioctl(int fd, VIDIOC_S_EXT_CTRLS, struct v4l2_ext_controls *argp)``
+
+.. c:macro:: VIDIOC_TRY_EXT_CTRLS
+
+``int ioctl(int fd, VIDIOC_TRY_EXT_CTRLS, struct v4l2_ext_controls *argp)``
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open()`.
+
+``argp``
+    Pointer to struct :c:type:`v4l2_ext_controls`.
+
+Description
+===========
+
+These ioctls allow the caller to get or set multiple controls
+atomically. Control IDs are grouped into control classes (see
+:ref:`ctrl-class`) and all controls in the control array must belong
+to the same control class.
+
+Applications must always fill in the ``count``, ``which``, ``controls``
+and ``reserved`` fields of struct
+:c:type:`v4l2_ext_controls`, and initialize the
+struct :c:type:`v4l2_ext_control` array pointed to
+by the ``controls`` fields.
+
+To get the current value of a set of controls applications initialize
+the ``id``, ``size`` and ``reserved2`` fields of each struct
+:c:type:`v4l2_ext_control` and call the
+:ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` ioctl. String controls must also set the
+``string`` field. Controls of compound types
+(``V4L2_CTRL_FLAG_HAS_PAYLOAD`` is set) must set the ``ptr`` field.
+
+If the ``size`` is too small to receive the control result (only
+relevant for pointer-type controls like strings), then the driver will
+set ``size`` to a valid value and return an ``ENOSPC`` error code. You
+should re-allocate the memory to this new size and try again. For the
+string type it is possible that the same issue occurs again if the
+string has grown in the meantime. It is recommended to call
+:ref:`VIDIOC_QUERYCTRL` first and use
+``maximum``\ +1 as the new ``size`` value. It is guaranteed that that is
+sufficient memory.
+
+N-dimensional arrays are set and retrieved row-by-row. You cannot set a
+partial array, all elements have to be set or retrieved. The total size
+is calculated as ``elems`` * ``elem_size``. These values can be obtained
+by calling :ref:`VIDIOC_QUERY_EXT_CTRL <VIDIOC_QUERYCTRL>`.
+
+To change the value of a set of controls applications initialize the
+``id``, ``size``, ``reserved2`` and ``value/value64/string/ptr`` fields
+of each struct :c:type:`v4l2_ext_control` and call
+the :ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` ioctl. The controls will only be set if *all*
+control values are valid.
+
+To check if a set of controls have correct values applications
+initialize the ``id``, ``size``, ``reserved2`` and
+``value/value64/string/ptr`` fields of each struct
+:c:type:`v4l2_ext_control` and call the
+:ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` ioctl. It is up to the driver whether wrong
+values are automatically adjusted to a valid value or if an error is
+returned.
+
+When the ``id`` or ``which`` is invalid drivers return an ``EINVAL`` error
+code. When the value is out of bounds drivers can choose to take the
+closest valid value or return an ``ERANGE`` error code, whatever seems more
+appropriate. In the first case the new value is set in struct
+:c:type:`v4l2_ext_control`. If the new control value
+is inappropriate (e.g. the given menu index is not supported by the menu
+control), then this will also result in an ``EINVAL`` error code error.
+
+If ``request_fd`` is set to a not-yet-queued :ref:`request <media-request-api>`
+file descriptor and ``which`` is set to ``V4L2_CTRL_WHICH_REQUEST_VAL``,
+then the controls are not applied immediately when calling
+:ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`, but instead are applied by
+the driver for the buffer associated with the same request.
+If the device does not support requests, then ``EACCES`` will be returned.
+If requests are supported but an invalid request file descriptor is given,
+then ``EINVAL`` will be returned.
+
+An attempt to call :ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` for a
+request that has already been queued will result in an ``EBUSY`` error.
+
+If ``request_fd`` is specified and ``which`` is set to
+``V4L2_CTRL_WHICH_REQUEST_VAL`` during a call to
+:ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`, then it will return the
+values of the controls at the time of request completion.
+If the request is not yet completed, then this will result in an
+``EACCES`` error.
+
+The driver will only set/get these controls if all control values are
+correct. This prevents the situation where only some of the controls
+were set/get. Only low-level errors (e. g. a failed i2c command) can
+still cause this situation.
+
+.. tabularcolumns:: |p{6.8cm}|p{4.0cm}|p{6.5cm}|
+
+.. c:type:: v4l2_ext_control
+
+.. raw:: latex
+
+   \footnotesize
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_ext_control
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - __u32
+      - ``id``
+      - Identifies the control, set by the application.
+    * - __u32
+      - ``size``
+      - The total size in bytes of the payload of this control.
+    * - :cspan:`2` The ``size`` field is normally 0, but for pointer
+	controls this should be set to the size of the memory that contains
+	the payload or that will receive the payload.
+	If :ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` finds that this value
+	is less than is required to store the payload result, then it is set
+	to a value large enough to store the payload result and ``ENOSPC`` is
+	returned.
+
+	.. note::
+
+	   For string controls, this ``size`` field should
+	   not be confused with the length of the string. This field refers
+	   to the size of the memory that contains the string. The actual
+	   *length* of the string may well be much smaller.
+    * - __u32
+      - ``reserved2``\ [1]
+      - Reserved for future extensions. Drivers and applications must set
+	the array to zero.
+    * - union {
+      - (anonymous)
+    * - __s32
+      - ``value``
+      - New value or current value. Valid if this control is not of type
+	``V4L2_CTRL_TYPE_INTEGER64`` and ``V4L2_CTRL_FLAG_HAS_PAYLOAD`` is
+	not set.
+    * - __s64
+      - ``value64``
+      - New value or current value. Valid if this control is of type
+	``V4L2_CTRL_TYPE_INTEGER64`` and ``V4L2_CTRL_FLAG_HAS_PAYLOAD`` is
+	not set.
+    * - char *
+      - ``string``
+      - A pointer to a string. Valid if this control is of type
+	``V4L2_CTRL_TYPE_STRING``.
+    * - __u8 *
+      - ``p_u8``
+      - A pointer to a matrix control of unsigned 8-bit values. Valid if
+	this control is of type ``V4L2_CTRL_TYPE_U8``.
+    * - __u16 *
+      - ``p_u16``
+      - A pointer to a matrix control of unsigned 16-bit values. Valid if
+	this control is of type ``V4L2_CTRL_TYPE_U16``.
+    * - __u32 *
+      - ``p_u32``
+      - A pointer to a matrix control of unsigned 32-bit values. Valid if
+	this control is of type ``V4L2_CTRL_TYPE_U32``.
+    * - struct :c:type:`v4l2_area` *
+      - ``p_area``
+      - A pointer to a struct :c:type:`v4l2_area`. Valid if this control is
+        of type ``V4L2_CTRL_TYPE_AREA``.
+    * - struct :c:type:`v4l2_ctrl_h264_sps` *
+      - ``p_h264_sps``
+      - A pointer to a struct :c:type:`v4l2_ctrl_h264_sps`. Valid if this control is
+        of type ``V4L2_CTRL_TYPE_H264_SPS``.
+    * - struct :c:type:`v4l2_ctrl_h264_pps` *
+      - ``p_h264_pps``
+      - A pointer to a struct :c:type:`v4l2_ctrl_h264_pps`. Valid if this control is
+        of type ``V4L2_CTRL_TYPE_H264_PPS``.
+    * - struct :c:type:`v4l2_ctrl_h264_scaling_matrix` *
+      - ``p_h264_scaling_matrix``
+      - A pointer to a struct :c:type:`v4l2_ctrl_h264_scaling_matrix`. Valid if this control is
+        of type ``V4L2_CTRL_TYPE_H264_SCALING_MATRIX``.
+    * - struct :c:type:`v4l2_ctrl_h264_pred_weights` *
+      - ``p_h264_pred_weights``
+      - A pointer to a struct :c:type:`v4l2_ctrl_h264_pred_weights`. Valid if this control is
+        of type ``V4L2_CTRL_TYPE_H264_PRED_WEIGHTS``.
+    * - struct :c:type:`v4l2_ctrl_h264_slice_params` *
+      - ``p_h264_slice_params``
+      - A pointer to a struct :c:type:`v4l2_ctrl_h264_slice_params`. Valid if this control is
+        of type ``V4L2_CTRL_TYPE_H264_SLICE_PARAMS``.
+    * - struct :c:type:`v4l2_ctrl_h264_decode_params` *
+      - ``p_h264_decode_params``
+      - A pointer to a struct :c:type:`v4l2_ctrl_h264_decode_params`. Valid if this control is
+        of type ``V4L2_CTRL_TYPE_H264_DECODE_PARAMS``.
+    * - struct :c:type:`v4l2_ctrl_fwht_params` *
+      - ``p_fwht_params``
+      - A pointer to a struct :c:type:`v4l2_ctrl_fwht_params`. Valid if this control is
+        of type ``V4L2_CTRL_TYPE_FWHT_PARAMS``.
+    * - struct :c:type:`v4l2_ctrl_vp8_frame` *
+      - ``p_vp8_frame``
+      - A pointer to a struct :c:type:`v4l2_ctrl_vp8_frame`. Valid if this control is
+        of type ``V4L2_CTRL_TYPE_VP8_FRAME``.
+    * - struct :c:type:`v4l2_ctrl_mpeg2_sequence` *
+      - ``p_mpeg2_sequence``
+      - A pointer to a struct :c:type:`v4l2_ctrl_mpeg2_sequence`. Valid if this control is
+        of type ``V4L2_CTRL_TYPE_MPEG2_SEQUENCE``.
+    * - struct :c:type:`v4l2_ctrl_mpeg2_picture` *
+      - ``p_mpeg2_picture``
+      - A pointer to a struct :c:type:`v4l2_ctrl_mpeg2_picture`. Valid if this control is
+        of type ``V4L2_CTRL_TYPE_MPEG2_PICTURE``.
+    * - struct :c:type:`v4l2_ctrl_mpeg2_quantisation` *
+      - ``p_mpeg2_quantisation``
+      - A pointer to a struct :c:type:`v4l2_ctrl_mpeg2_quantisation`. Valid if this control is
+        of type ``V4L2_CTRL_TYPE_MPEG2_QUANTISATION``.
+    * - struct :c:type:`v4l2_ctrl_vp9_compressed_hdr` *
+      - ``p_vp9_compressed_hdr_probs``
+      - A pointer to a struct :c:type:`v4l2_ctrl_vp9_compressed_hdr`. Valid if this
+        control is of type ``V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR``.
+    * - struct :c:type:`v4l2_ctrl_vp9_frame` *
+      - ``p_vp9_frame``
+      - A pointer to a struct :c:type:`v4l2_ctrl_vp9_frame`. Valid if this
+        control is of type ``V4L2_CTRL_TYPE_VP9_FRAME``.
+    * - struct :c:type:`v4l2_ctrl_hdr10_cll_info` *
+      - ``p_hdr10_cll``
+      - A pointer to a struct :c:type:`v4l2_ctrl_hdr10_cll_info`. Valid if this control is
+        of type ``V4L2_CTRL_TYPE_HDR10_CLL_INFO``.
+    * - struct :c:type:`v4l2_ctrl_hdr10_mastering_display` *
+      - ``p_hdr10_mastering``
+      - A pointer to a struct :c:type:`v4l2_ctrl_hdr10_mastering_display`. Valid if this control is
+        of type ``V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY``.
+    * - struct :c:type:`v4l2_ctrl_hevc_sps` *
+      - ``p_hevc_sps``
+      - A pointer to a struct :c:type:`v4l2_ctrl_hevc_sps`. Valid if this
+        control is of type ``V4L2_CTRL_TYPE_HEVC_SPS``.
+    * - struct :c:type:`v4l2_ctrl_hevc_pps` *
+      - ``p_hevc_pps``
+      - A pointer to a struct :c:type:`v4l2_ctrl_hevc_pps`. Valid if this
+        control is of type ``V4L2_CTRL_TYPE_HEVC_PPS``.
+    * - struct :c:type:`v4l2_ctrl_hevc_slice_params` *
+      - ``p_hevc_slice_params``
+      - A pointer to a struct :c:type:`v4l2_ctrl_hevc_slice_params`. Valid if this
+        control is of type ``V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS``.
+    * - struct :c:type:`v4l2_ctrl_hevc_scaling_matrix` *
+      - ``p_hevc_scaling_matrix``
+      - A pointer to a struct :c:type:`v4l2_ctrl_hevc_scaling_matrix`. Valid if this
+        control is of type ``V4L2_CTRL_TYPE_HEVC_SCALING_MATRIX``.
+    * - struct :c:type:`v4l2_ctrl_hevc_decode_params` *
+      - ``p_hevc_decode_params``
+      - A pointer to a struct :c:type:`v4l2_ctrl_hevc_decode_params`. Valid if this
+        control is of type ``V4L2_CTRL_TYPE_HEVC_DECODE_PARAMS``.
+    * - void *
+      - ``ptr``
+      - A pointer to a compound type which can be an N-dimensional array
+	and/or a compound type (the control's type is >=
+	``V4L2_CTRL_COMPOUND_TYPES``). Valid if
+	``V4L2_CTRL_FLAG_HAS_PAYLOAD`` is set for this control.
+    * - }
+      -
+
+.. raw:: latex
+
+   \normalsize
+
+.. tabularcolumns:: |p{4.0cm}|p{2.5cm}|p{10.8cm}|
+
+.. c:type:: v4l2_ext_controls
+
+.. cssclass:: longtable
+
+.. flat-table:: struct v4l2_ext_controls
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - union {
+      - (anonymous)
+    * - __u32
+      - ``which``
+      - Which value of the control to get/set/try.
+    * - :cspan:`2` ``V4L2_CTRL_WHICH_CUR_VAL`` will return the current value of
+	the control, ``V4L2_CTRL_WHICH_DEF_VAL`` will return the default
+	value of the control and ``V4L2_CTRL_WHICH_REQUEST_VAL`` indicates that
+	these controls have to be retrieved from a request or tried/set for
+	a request. In the latter case the ``request_fd`` field contains the
+	file descriptor of the request that should be used. If the device
+	does not support requests, then ``EACCES`` will be returned.
+
+	When using ``V4L2_CTRL_WHICH_DEF_VAL`` be aware that you can only
+	get the default value of the control, you cannot set or try it.
+
+	For backwards compatibility you can also use a control class here
+	(see :ref:`ctrl-class`). In that case all controls have to
+	belong to that control class. This usage is deprecated, instead
+	just use ``V4L2_CTRL_WHICH_CUR_VAL``. There are some very old
+	drivers that do not yet support ``V4L2_CTRL_WHICH_CUR_VAL`` and
+	that require a control class here. You can test for such drivers
+	by setting ``which`` to ``V4L2_CTRL_WHICH_CUR_VAL`` and calling
+	:ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` with a count of 0.
+	If that fails, then the driver does not support ``V4L2_CTRL_WHICH_CUR_VAL``.
+    * - __u32
+      - ``ctrl_class``
+      - Deprecated name kept for backwards compatibility. Use ``which`` instead.
+    * - }
+      -
+    * - __u32
+      - ``count``
+      - The number of controls in the controls array. May also be zero.
+    * - __u32
+      - ``error_idx``
+      - Index of the failing control. Set by the driver in case of an error.
+    * - :cspan:`2` If the error is associated
+	with a particular control, then ``error_idx`` is set to the index
+	of that control. If the error is not related to a specific
+	control, or the validation step failed (see below), then
+	``error_idx`` is set to ``count``. The value is undefined if the
+	ioctl returned 0 (success).
+
+	Before controls are read from/written to hardware a validation
+	step takes place: this checks if all controls in the list are
+	valid controls, if no attempt is made to write to a read-only
+	control or read from a write-only control, and any other up-front
+	checks that can be done without accessing the hardware. The exact
+	validations done during this step are driver dependent since some
+	checks might require hardware access for some devices, thus making
+	it impossible to do those checks up-front. However, drivers should
+	make a best-effort to do as many up-front checks as possible.
+
+	This check is done to avoid leaving the hardware in an
+	inconsistent state due to easy-to-avoid problems. But it leads to
+	another problem: the application needs to know whether an error
+	came from the validation step (meaning that the hardware was not
+	touched) or from an error during the actual reading from/writing
+	to hardware.
+
+	The, in hindsight quite poor, solution for that is to set
+	``error_idx`` to ``count`` if the validation failed. This has the
+	unfortunate side-effect that it is not possible to see which
+	control failed the validation. If the validation was successful
+	and the error happened while accessing the hardware, then
+	``error_idx`` is less than ``count`` and only the controls up to
+	``error_idx-1`` were read or written correctly, and the state of
+	the remaining controls is undefined.
+
+	Since :ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` does not access hardware there is
+	also no need to handle the validation step in this special way, so
+	``error_idx`` will just be set to the control that failed the
+	validation step instead of to ``count``. This means that if
+	:ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` fails with ``error_idx`` set to ``count``,
+	then you can call :ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` to try to discover the
+	actual control that failed the validation step. Unfortunately,
+	there is no ``TRY`` equivalent for :ref:`VIDIOC_G_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>`.
+    * - __s32
+      - ``request_fd``
+      - File descriptor of the request to be used by this operation. Only
+	valid if ``which`` is set to ``V4L2_CTRL_WHICH_REQUEST_VAL``.
+	If the device does not support requests, then ``EACCES`` will be returned.
+	If requests are supported but an invalid request file descriptor is
+	given, then ``EINVAL`` will be returned.
+    * - __u32
+      - ``reserved``\ [1]
+      - Reserved for future extensions.
+
+	Drivers and applications must set the array to zero.
+    * - struct :c:type:`v4l2_ext_control` *
+      - ``controls``
+      - Pointer to an array of ``count`` v4l2_ext_control structures.
+
+	Ignored if ``count`` equals zero.
+
+.. tabularcolumns:: |p{7.3cm}|p{2.0cm}|p{8.0cm}|
+
+.. cssclass:: longtable
+
+.. _ctrl-class:
+
+.. flat-table:: Control classes
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * - ``V4L2_CTRL_CLASS_USER``
+      - 0x980000
+      - The class containing user controls. These controls are described
+	in :ref:`control`. All controls that can be set using the
+	:ref:`VIDIOC_S_CTRL <VIDIOC_G_CTRL>` and
+	:ref:`VIDIOC_G_CTRL <VIDIOC_G_CTRL>` ioctl belong to this
+	class.
+    * - ``V4L2_CTRL_CLASS_CODEC``
+      - 0x990000
+      - The class containing stateful codec controls. These controls are
+	described in :ref:`codec-controls`.
+    * - ``V4L2_CTRL_CLASS_CAMERA``
+      - 0x9a0000
+      - The class containing camera controls. These controls are described
+	in :ref:`camera-controls`.
+    * - ``V4L2_CTRL_CLASS_FM_TX``
+      - 0x9b0000
+      - The class containing FM Transmitter (FM TX) controls. These
+	controls are described in :ref:`fm-tx-controls`.
+    * - ``V4L2_CTRL_CLASS_FLASH``
+      - 0x9c0000
+      - The class containing flash device controls. These controls are
+	described in :ref:`flash-controls`.
+    * - ``V4L2_CTRL_CLASS_JPEG``
+      - 0x9d0000
+      - The class containing JPEG compression controls. These controls are
+	described in :ref:`jpeg-controls`.
+    * - ``V4L2_CTRL_CLASS_IMAGE_SOURCE``
+      - 0x9e0000
+      - The class containing image source controls. These controls are
+	described in :ref:`image-source-controls`.
+    * - ``V4L2_CTRL_CLASS_IMAGE_PROC``
+      - 0x9f0000
+      - The class containing image processing controls. These controls are
+	described in :ref:`image-process-controls`.
+    * - ``V4L2_CTRL_CLASS_FM_RX``
+      - 0xa10000
+      - The class containing FM Receiver (FM RX) controls. These controls
+	are described in :ref:`fm-rx-controls`.
+    * - ``V4L2_CTRL_CLASS_RF_TUNER``
+      - 0xa20000
+      - The class containing RF tuner controls. These controls are
+	described in :ref:`rf-tuner-controls`.
+    * - ``V4L2_CTRL_CLASS_DETECT``
+      - 0xa30000
+      - The class containing motion or object detection controls. These controls
+        are described in :ref:`detect-controls`.
+    * - ``V4L2_CTRL_CLASS_CODEC_STATELESS``
+      - 0xa40000
+      - The class containing stateless codec controls. These controls are
+	described in :ref:`codec-stateless-controls`.
+    * - ``V4L2_CTRL_CLASS_COLORIMETRY``
+      - 0xa50000
+      - The class containing colorimetry controls. These controls are
+	described in :ref:`colorimetry-controls`.
+
+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.
+
+EINVAL
+    The struct :c:type:`v4l2_ext_control` ``id`` is
+    invalid, or the struct :c:type:`v4l2_ext_controls`
+    ``which`` is invalid, or the struct
+    :c:type:`v4l2_ext_control` ``value`` was
+    inappropriate (e.g. the given menu index is not supported by the
+    driver), or the ``which`` field was set to ``V4L2_CTRL_WHICH_REQUEST_VAL``
+    but the given ``request_fd`` was invalid or ``V4L2_CTRL_WHICH_REQUEST_VAL``
+    is not supported by the kernel.
+    This error code is also returned by the
+    :ref:`VIDIOC_S_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` and :ref:`VIDIOC_TRY_EXT_CTRLS <VIDIOC_G_EXT_CTRLS>` ioctls if two or
+    more control values are in conflict.
+
+ERANGE
+    The struct :c:type:`v4l2_ext_control` ``value``
+    is out of bounds.
+
+EBUSY
+    The control is temporarily not changeable, possibly because another
+    applications took over control of the device function this control
+    belongs to, or (if the ``which`` field was set to
+    ``V4L2_CTRL_WHICH_REQUEST_VAL``) the request was queued but not yet
+    completed.
+
+ENOSPC
+    The space reserved for the control's payload is insufficient. The
+    field ``size`` is set to a value that is enough to store the payload
+    and this error code is returned.
+
+EACCES
+    Attempt to try or set a read-only control, or to get a write-only
+    control, or to get a control from a request that has not yet been
+    completed.
+
+    Or the ``which`` field was set to ``V4L2_CTRL_WHICH_REQUEST_VAL`` but the
+    device does not support requests.
+
+    Or if there is an attempt to set an inactive control and the driver is
+    not capable of caching the new value until the control is active again.