From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 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(). ... --- .../userspace-api/media/v4l/vidioc-enuminput.rst | 229 +++++++++++++++++++++ 1 file changed, 229 insertions(+) create mode 100644 Documentation/userspace-api/media/v4l/vidioc-enuminput.rst (limited to 'Documentation/userspace-api/media/v4l/vidioc-enuminput.rst') diff --git a/Documentation/userspace-api/media/v4l/vidioc-enuminput.rst b/Documentation/userspace-api/media/v4l/vidioc-enuminput.rst new file mode 100644 index 000000000..d5f0535bd --- /dev/null +++ b/Documentation/userspace-api/media/v4l/vidioc-enuminput.rst @@ -0,0 +1,229 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: V4L + +.. _VIDIOC_ENUMINPUT: + +********************** +ioctl VIDIOC_ENUMINPUT +********************** + +Name +==== + +VIDIOC_ENUMINPUT - Enumerate video inputs + +Synopsis +======== + +.. c:macro:: VIDIOC_ENUMINPUT + +``int ioctl(int fd, VIDIOC_ENUMINPUT, struct v4l2_input *argp)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``argp`` + Pointer to struct :c:type:`v4l2_input`. + +Description +=========== + +To query the attributes of a video input applications initialize the +``index`` field of struct :c:type:`v4l2_input` and call the +:ref:`VIDIOC_ENUMINPUT` with a pointer to this structure. Drivers +fill the rest of the structure or return an ``EINVAL`` error code when the +index is out of bounds. To enumerate all inputs applications shall begin +at index zero, incrementing by one until the driver returns ``EINVAL``. + +.. tabularcolumns:: |p{3.0cm}|p{3.5cm}|p{10.8cm}| + +.. c:type:: v4l2_input + +.. flat-table:: struct v4l2_input + :header-rows: 0 + :stub-columns: 0 + :widths: 1 1 2 + + * - __u32 + - ``index`` + - Identifies the input, set by the application. + * - __u8 + - ``name``\ [32] + - Name of the video input, a NUL-terminated ASCII string, for + example: "Vin (Composite 2)". This information is intended for the + user, preferably the connector label on the device itself. + * - __u32 + - ``type`` + - Type of the input, see :ref:`input-type`. + * - __u32 + - ``audioset`` + - Drivers can enumerate up to 32 video and audio inputs. This field + shows which audio inputs were selectable as audio source if this + was the currently selected video input. It is a bit mask. The LSB + corresponds to audio input 0, the MSB to input 31. Any number of + bits can be set, or none. + + When the driver does not enumerate audio inputs no bits must be + set. Applications shall not interpret this as lack of audio + support. Some drivers automatically select audio sources and do + not enumerate them since there is no choice anyway. + + For details on audio inputs and how to select the current input + see :ref:`audio`. + * - __u32 + - ``tuner`` + - Capture devices can have zero or more tuners (RF demodulators). + When the ``type`` is set to ``V4L2_INPUT_TYPE_TUNER`` this is an + RF connector and this field identifies the tuner. It corresponds + to struct :c:type:`v4l2_tuner` field ``index``. For + details on tuners see :ref:`tuner`. + * - :ref:`v4l2_std_id ` + - ``std`` + - Every video input supports one or more different video standards. + This field is a set of all supported standards. For details on + video standards and how to switch see :ref:`standard`. + * - __u32 + - ``status`` + - This field provides status information about the input. See + :ref:`input-status` for flags. With the exception of the sensor + orientation bits ``status`` is only valid when this is the current + input. + * - __u32 + - ``capabilities`` + - This field provides capabilities for the input. See + :ref:`input-capabilities` for flags. + * - __u32 + - ``reserved``\ [3] + - Reserved for future extensions. Drivers must set the array to + zero. + + +.. tabularcolumns:: |p{6.6cm}|p{1.0cm}|p{9.7cm}| + +.. _input-type: + +.. flat-table:: Input Types + :header-rows: 0 + :stub-columns: 0 + :widths: 3 1 4 + + * - ``V4L2_INPUT_TYPE_TUNER`` + - 1 + - This input uses a tuner (RF demodulator). + * - ``V4L2_INPUT_TYPE_CAMERA`` + - 2 + - Any non-tuner video input, for example Composite Video, + S-Video, HDMI, camera sensor. The naming as ``_TYPE_CAMERA`` is historical, + today we would have called it ``_TYPE_VIDEO``. + * - ``V4L2_INPUT_TYPE_TOUCH`` + - 3 + - This input is a touch device for capturing raw touch data. + + +.. tabularcolumns:: |p{5.6cm}|p{2.6cm}|p{9.1cm}| + +.. _input-status: + +.. flat-table:: Input Status Flags + :header-rows: 0 + :stub-columns: 0 + + * - :cspan:`2` General + * - ``V4L2_IN_ST_NO_POWER`` + - 0x00000001 + - Attached device is off. + * - ``V4L2_IN_ST_NO_SIGNAL`` + - 0x00000002 + - + * - ``V4L2_IN_ST_NO_COLOR`` + - 0x00000004 + - The hardware supports color decoding, but does not detect color + modulation in the signal. + * - :cspan:`2` Sensor Orientation + * - ``V4L2_IN_ST_HFLIP`` + - 0x00000010 + - The input is connected to a device that produces a signal that is + flipped horizontally and does not correct this before passing the + signal to userspace. + * - ``V4L2_IN_ST_VFLIP`` + - 0x00000020 + - The input is connected to a device that produces a signal that is + flipped vertically and does not correct this before passing the + signal to userspace. + .. note:: A 180 degree rotation is the same as HFLIP | VFLIP + * - :cspan:`2` Analog Video + * - ``V4L2_IN_ST_NO_H_LOCK`` + - 0x00000100 + - No horizontal sync lock. + * - ``V4L2_IN_ST_COLOR_KILL`` + - 0x00000200 + - A color killer circuit automatically disables color decoding when + it detects no color modulation. When this flag is set the color + killer is enabled *and* has shut off color decoding. + * - ``V4L2_IN_ST_NO_V_LOCK`` + - 0x00000400 + - No vertical sync lock. + * - ``V4L2_IN_ST_NO_STD_LOCK`` + - 0x00000800 + - No standard format lock in case of auto-detection format + by the component. + * - :cspan:`2` Digital Video + * - ``V4L2_IN_ST_NO_SYNC`` + - 0x00010000 + - No synchronization lock. + * - ``V4L2_IN_ST_NO_EQU`` + - 0x00020000 + - No equalizer lock. + * - ``V4L2_IN_ST_NO_CARRIER`` + - 0x00040000 + - Carrier recovery failed. + * - :cspan:`2` VCR and Set-Top Box + * - ``V4L2_IN_ST_MACROVISION`` + - 0x01000000 + - Macrovision is an analog copy prevention system mangling the video + signal to confuse video recorders. When this flag is set + Macrovision has been detected. + * - ``V4L2_IN_ST_NO_ACCESS`` + - 0x02000000 + - Conditional access denied. + * - ``V4L2_IN_ST_VTR`` + - 0x04000000 + - VTR time constant. [?] + + +.. tabularcolumns:: |p{6.6cm}|p{2.4cm}|p{8.3cm}| + +.. _input-capabilities: + +.. flat-table:: Input capabilities + :header-rows: 0 + :stub-columns: 0 + :widths: 3 1 4 + + * - ``V4L2_IN_CAP_DV_TIMINGS`` + - 0x00000002 + - This input supports setting video timings by using + ``VIDIOC_S_DV_TIMINGS``. + * - ``V4L2_IN_CAP_STD`` + - 0x00000004 + - This input supports setting the TV standard by using + ``VIDIOC_S_STD``. + * - ``V4L2_IN_CAP_NATIVE_SIZE`` + - 0x00000008 + - This input supports setting the native size using the + ``V4L2_SEL_TGT_NATIVE_SIZE`` selection target, see + :ref:`v4l2-selections-common`. + +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 ` chapter. + +EINVAL + The struct :c:type:`v4l2_input` ``index`` is out of + bounds. -- cgit v1.2.3