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(). ... --- Documentation/admin-guide/media/ivtv.rst | 218 +++++++++++++++++++++++++++++++ 1 file changed, 218 insertions(+) create mode 100644 Documentation/admin-guide/media/ivtv.rst (limited to 'Documentation/admin-guide/media/ivtv.rst') diff --git a/Documentation/admin-guide/media/ivtv.rst b/Documentation/admin-guide/media/ivtv.rst new file mode 100644 index 000000000..101f16d02 --- /dev/null +++ b/Documentation/admin-guide/media/ivtv.rst @@ -0,0 +1,218 @@ +.. SPDX-License-Identifier: GPL-2.0 + +The ivtv driver +=============== + +Author: Hans Verkuil + +This is a v4l2 device driver for the Conexant cx23415/6 MPEG encoder/decoder. +The cx23415 can do both encoding and decoding, the cx23416 can only do MPEG +encoding. Currently the only card featuring full decoding support is the +Hauppauge PVR-350. + +.. note:: + + #) This driver requires the latest encoder firmware (version 2.06.039, size + 376836 bytes). Get the firmware from here: + + https://linuxtv.org/downloads/firmware/#conexant + + #) 'normal' TV applications do not work with this driver, you need + an application that can handle MPEG input such as mplayer, xine, MythTV, + etc. + +The primary goal of the IVTV project is to provide a "clean room" Linux +Open Source driver implementation for video capture cards based on the +iCompression iTVC15 or Conexant CX23415/CX23416 MPEG Codec. + +Features +-------- + + * Hardware mpeg2 capture of broadcast video (and sound) via the tuner or + S-Video/Composite and audio line-in. + * Hardware mpeg2 capture of FM radio where hardware support exists + * Supports NTSC, PAL, SECAM with stereo sound + * Supports SAP and bilingual transmissions. + * Supports raw VBI (closed captions and teletext). + * Supports sliced VBI (closed captions and teletext) and is able to insert + this into the captured MPEG stream. + * Supports raw YUV and PCM input. + +Additional features for the PVR-350 (CX23415 based) +--------------------------------------------------- + + * Provides hardware mpeg2 playback + * Provides comprehensive OSD (On Screen Display: ie. graphics overlaying the + video signal) + * Provides a framebuffer (allowing X applications to appear on the video + device) + * Supports raw YUV output. + +IMPORTANT: In case of problems first read this page: + https://help.ubuntu.com/community/Install_IVTV_Troubleshooting + +See also +-------- + +https://linuxtv.org + +IRC +--- + +irc://irc.freenode.net/#v4l + +---------------------------------------------------------- + +Devices +------- + +A maximum of 12 ivtv boards are allowed at the moment. + +Cards that don't have a video output capability (i.e. non PVR350 cards) +lack the vbi8, vbi16, video16 and video48 devices. They also do not +support the framebuffer device /dev/fbx for OSD. + +The radio0 device may or may not be present, depending on whether the +card has a radio tuner or not. + +Here is a list of the base v4l devices: + +.. code-block:: none + + crw-rw---- 1 root video 81, 0 Jun 19 22:22 /dev/video0 + crw-rw---- 1 root video 81, 16 Jun 19 22:22 /dev/video16 + crw-rw---- 1 root video 81, 24 Jun 19 22:22 /dev/video24 + crw-rw---- 1 root video 81, 32 Jun 19 22:22 /dev/video32 + crw-rw---- 1 root video 81, 48 Jun 19 22:22 /dev/video48 + crw-rw---- 1 root video 81, 64 Jun 19 22:22 /dev/radio0 + crw-rw---- 1 root video 81, 224 Jun 19 22:22 /dev/vbi0 + crw-rw---- 1 root video 81, 228 Jun 19 22:22 /dev/vbi8 + crw-rw---- 1 root video 81, 232 Jun 19 22:22 /dev/vbi16 + +Base devices +------------ + +For every extra card you have the numbers increased by one. For example, +/dev/video0 is listed as the 'base' encoding capture device so we have: + +- /dev/video0 is the encoding capture device for the first card (card 0) +- /dev/video1 is the encoding capture device for the second card (card 1) +- /dev/video2 is the encoding capture device for the third card (card 2) + +Note that if the first card doesn't have a feature (eg no decoder, so no +video16, the second card will still use video17. The simple rule is 'add +the card number to the base device number'. If you have other capture +cards (e.g. WinTV PCI) that are detected first, then you have to tell +the ivtv module about it so that it will start counting at 1 (or 2, or +whatever). Otherwise the device numbers can get confusing. The ivtv +'ivtv_first_minor' module option can be used for that. + + +- /dev/video0 + + The encoding capture device(s). + + Read-only. + + Reading from this device gets you the MPEG1/2 program stream. + Example: + + .. code-block:: none + + cat /dev/video0 > my.mpg (you need to hit ctrl-c to exit) + + +- /dev/video16 + + The decoder output device(s) + + Write-only. Only present if the MPEG decoder (i.e. CX23415) exists. + + An mpeg2 stream sent to this device will appear on the selected video + display, audio will appear on the line-out/audio out. It is only + available for cards that support video out. Example: + + .. code-block:: none + + cat my.mpg >/dev/video16 + + +- /dev/video24 + + The raw audio capture device(s). + + Read-only + + The raw audio PCM stereo stream from the currently selected + tuner or audio line-in. Reading from this device results in a raw + (signed 16 bit Little Endian, 48000 Hz, stereo pcm) capture. + This device only captures audio. This should be replaced by an ALSA + device in the future. + Note that there is no corresponding raw audio output device, this is + not supported in the decoder firmware. + + +- /dev/video32 + + The raw video capture device(s) + + Read-only + + The raw YUV video output from the current video input. The YUV format + is a 16x16 linear tiled NV12 format (V4L2_PIX_FMT_NV12_16L16) + + Note that the YUV and PCM streams are not synchronized, so they are of + limited use. + + +- /dev/video48 + + The raw video display device(s) + + Write-only. Only present if the MPEG decoder (i.e. CX23415) exists. + + Writes a YUV stream to the decoder of the card. + + +- /dev/radio0 + + The radio tuner device(s) + + Cannot be read or written. + + Used to enable the radio tuner and tune to a frequency. You cannot + read or write audio streams with this device. Once you use this + device to tune the radio, use /dev/video24 to read the raw pcm stream + or /dev/video0 to get an mpeg2 stream with black video. + + +- /dev/vbi0 + + The 'vertical blank interval' (Teletext, CC, WSS etc) capture device(s) + + Read-only + + Captures the raw (or sliced) video data sent during the Vertical Blank + Interval. This data is used to encode teletext, closed captions, VPS, + widescreen signalling, electronic program guide information, and other + services. + + +- /dev/vbi8 + + Processed vbi feedback device(s) + + Read-only. Only present if the MPEG decoder (i.e. CX23415) exists. + + The sliced VBI data embedded in an MPEG stream is reproduced on this + device. So while playing back a recording on /dev/video16, you can + read the embedded VBI data from /dev/vbi8. + + +- /dev/vbi16 + + The vbi 'display' device(s) + + Write-only. Only present if the MPEG decoder (i.e. CX23415) exists. + + Can be used to send sliced VBI data to the video-out connector. -- cgit v1.2.3