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(). ... --- .../media/v4l/vidioc-g-sliced-vbi-cap.rst | 202 +++++++++++++++++++++ 1 file changed, 202 insertions(+) create mode 100644 Documentation/userspace-api/media/v4l/vidioc-g-sliced-vbi-cap.rst (limited to 'Documentation/userspace-api/media/v4l/vidioc-g-sliced-vbi-cap.rst') diff --git a/Documentation/userspace-api/media/v4l/vidioc-g-sliced-vbi-cap.rst b/Documentation/userspace-api/media/v4l/vidioc-g-sliced-vbi-cap.rst new file mode 100644 index 000000000..90d40f6af --- /dev/null +++ b/Documentation/userspace-api/media/v4l/vidioc-g-sliced-vbi-cap.rst @@ -0,0 +1,202 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later +.. c:namespace:: V4L + +.. _VIDIOC_G_SLICED_VBI_CAP: + +***************************** +ioctl VIDIOC_G_SLICED_VBI_CAP +***************************** + +Name +==== + +VIDIOC_G_SLICED_VBI_CAP - Query sliced VBI capabilities + +Synopsis +======== + +.. c:macro:: VIDIOC_G_SLICED_VBI_CAP + +``int ioctl(int fd, VIDIOC_G_SLICED_VBI_CAP, struct v4l2_sliced_vbi_cap *argp)`` + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open()`. + +``argp`` + Pointer to struct :c:type:`v4l2_sliced_vbi_cap`. + +Description +=========== + +To find out which data services are supported by a sliced VBI capture or +output device, applications initialize the ``type`` field of a struct +:c:type:`v4l2_sliced_vbi_cap`, clear the +``reserved`` array and call the :ref:`VIDIOC_G_SLICED_VBI_CAP ` ioctl. The +driver fills in the remaining fields or returns an ``EINVAL`` error code if +the sliced VBI API is unsupported or ``type`` is invalid. + +.. note:: + + The ``type`` field was added, and the ioctl changed from read-only + to write-read, in Linux 2.6.19. + +.. c:type:: v4l2_sliced_vbi_cap + +.. tabularcolumns:: |p{1.4cm}|p{4.4cm}|p{4.5cm}|p{3.6cm}|p{3.6cm}| + +.. flat-table:: struct v4l2_sliced_vbi_cap + :header-rows: 0 + :stub-columns: 0 + :widths: 3 3 2 2 2 + + * - __u16 + - ``service_set`` + - :cspan:`2` A set of all data services supported by the driver. + + Equal to the union of all elements of the ``service_lines`` array. + * - __u16 + - ``service_lines``\ [2][24] + - :cspan:`2` Each element of this array contains a set of data + services the hardware can look for or insert into a particular + scan line. Data services are defined in :ref:`vbi-services`. + Array indices map to ITU-R line numbers\ [#f1]_ as follows: + * - + - + - Element + - 525 line systems + - 625 line systems + * - + - + - ``service_lines``\ [0][1] + - 1 + - 1 + * - + - + - ``service_lines``\ [0][23] + - 23 + - 23 + * - + - + - ``service_lines``\ [1][1] + - 264 + - 314 + * - + - + - ``service_lines``\ [1][23] + - 286 + - 336 + * - + * - + - + - :cspan:`2` The number of VBI lines the hardware can capture or + output per frame, or the number of services it can identify on a + given line may be limited. For example on PAL line 16 the hardware + may be able to look for a VPS or Teletext signal, but not both at + the same time. Applications can learn about these limits using the + :ref:`VIDIOC_S_FMT ` ioctl as described in + :ref:`sliced`. + * - + * - + - + - :cspan:`2` Drivers must set ``service_lines`` [0][0] and + ``service_lines``\ [1][0] to zero. + * - __u32 + - ``type`` + - Type of the data stream, see :c:type:`v4l2_buf_type`. Should be + ``V4L2_BUF_TYPE_SLICED_VBI_CAPTURE`` or + ``V4L2_BUF_TYPE_SLICED_VBI_OUTPUT``. + * - __u32 + - ``reserved``\ [3] + - :cspan:`2` This array is reserved for future extensions. + + Applications and drivers must set it to zero. + +.. [#f1] + + See also :ref:`vbi-525` and :ref:`vbi-625`. + +.. raw:: latex + + \scriptsize + +.. tabularcolumns:: |p{3.9cm}|p{1.0cm}|p{2.0cm}|p{3.0cm}|p{7.0cm}| + +.. _vbi-services: + +.. flat-table:: Sliced VBI services + :header-rows: 1 + :stub-columns: 0 + :widths: 2 1 1 2 2 + + * - Symbol + - Value + - Reference + - Lines, usually + - Payload + * - ``V4L2_SLICED_TELETEXT_B`` (Teletext System B) + - 0x0001 + - :ref:`ets300706`, + + :ref:`itu653` + - PAL/SECAM line 7-22, 320-335 (second field 7-22) + - Last 42 of the 45 byte Teletext packet, that is without clock + run-in and framing code, lsb first transmitted. + * - ``V4L2_SLICED_VPS`` + - 0x0400 + - :ref:`ets300231` + - PAL line 16 + - Byte number 3 to 15 according to Figure 9 of ETS 300 231, lsb + first transmitted. + * - ``V4L2_SLICED_CAPTION_525`` + - 0x1000 + - :ref:`cea608` + - NTSC line 21, 284 (second field 21) + - Two bytes in transmission order, including parity bit, lsb first + transmitted. + * - ``V4L2_SLICED_WSS_625`` + - 0x4000 + - :ref:`en300294`, + + :ref:`itu1119` + - PAL/SECAM line 23 + - See :ref:`v4l2-sliced-vbi-cap-wss-625-payload` below. + * - ``V4L2_SLICED_VBI_525`` + - 0x1000 + - :cspan:`2` Set of services applicable to 525 line systems. + * - ``V4L2_SLICED_VBI_625`` + - 0x4401 + - :cspan:`2` Set of services applicable to 625 line systems. + + +.. raw:: latex + + \normalsize + +.. _v4l2-sliced-vbi-cap-wss-625-payload: + +V4L2_SLICED_VBI_CAP WSS_625 payload +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The payload for ``V4L2_SLICED_WSS_625`` is: + + +-----+------------------+-----------------------+ + |Byte | 0 | 1 | + +-----+--------+---------+-----------+-----------+ + | | msb | lsb | msb | lsb | + | +-+-+-+--+--+-+-+--+--+-+--+---+---+--+-+--+ + | Bit |7|6|5|4 | 3|2|1|0 | x|x|13|12 | 11|10|9|8 | + +-----+-+-+-+--+--+-+-+--+--+-+--+---+---+--+-+--+ + + +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 value in the ``type`` field is wrong. -- cgit v1.2.3