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(). ... --- drivers/media/rc/rc-loopback.c | 274 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 274 insertions(+) create mode 100644 drivers/media/rc/rc-loopback.c (limited to 'drivers/media/rc/rc-loopback.c') diff --git a/drivers/media/rc/rc-loopback.c b/drivers/media/rc/rc-loopback.c new file mode 100644 index 000000000..b356041c5 --- /dev/null +++ b/drivers/media/rc/rc-loopback.c @@ -0,0 +1,274 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Loopback driver for rc-core, + * + * Copyright (c) 2010 David Härdeman + * + * This driver receives TX data and passes it back as RX data, + * which is useful for (scripted) debugging of rc-core without + * having to use actual hardware. + */ + +#include +#include +#include +#include +#include + +#define DRIVER_NAME "rc-loopback" +#define RXMASK_NARROWBAND 0x1 +#define RXMASK_WIDEBAND 0x2 + +struct loopback_dev { + struct rc_dev *dev; + u32 txmask; + u32 txcarrier; + u32 txduty; + bool idle; + bool wideband; + bool carrierreport; + u32 rxcarriermin; + u32 rxcarriermax; +}; + +static struct loopback_dev loopdev; + +static int loop_set_tx_mask(struct rc_dev *dev, u32 mask) +{ + struct loopback_dev *lodev = dev->priv; + + if ((mask & (RXMASK_NARROWBAND | RXMASK_WIDEBAND)) != mask) { + dev_dbg(&dev->dev, "invalid tx mask: %u\n", mask); + return 2; + } + + dev_dbg(&dev->dev, "setting tx mask: %u\n", mask); + lodev->txmask = mask; + return 0; +} + +static int loop_set_tx_carrier(struct rc_dev *dev, u32 carrier) +{ + struct loopback_dev *lodev = dev->priv; + + dev_dbg(&dev->dev, "setting tx carrier: %u\n", carrier); + lodev->txcarrier = carrier; + return 0; +} + +static int loop_set_tx_duty_cycle(struct rc_dev *dev, u32 duty_cycle) +{ + struct loopback_dev *lodev = dev->priv; + + if (duty_cycle < 1 || duty_cycle > 99) { + dev_dbg(&dev->dev, "invalid duty cycle: %u\n", duty_cycle); + return -EINVAL; + } + + dev_dbg(&dev->dev, "setting duty cycle: %u\n", duty_cycle); + lodev->txduty = duty_cycle; + return 0; +} + +static int loop_set_rx_carrier_range(struct rc_dev *dev, u32 min, u32 max) +{ + struct loopback_dev *lodev = dev->priv; + + if (min < 1 || min > max) { + dev_dbg(&dev->dev, "invalid rx carrier range %u to %u\n", min, max); + return -EINVAL; + } + + dev_dbg(&dev->dev, "setting rx carrier range %u to %u\n", min, max); + lodev->rxcarriermin = min; + lodev->rxcarriermax = max; + return 0; +} + +static int loop_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned count) +{ + struct loopback_dev *lodev = dev->priv; + u32 rxmask; + unsigned i; + struct ir_raw_event rawir = {}; + + if (lodev->txcarrier < lodev->rxcarriermin || + lodev->txcarrier > lodev->rxcarriermax) { + dev_dbg(&dev->dev, "ignoring tx, carrier out of range\n"); + goto out; + } + + if (lodev->wideband) + rxmask = RXMASK_WIDEBAND; + else + rxmask = RXMASK_NARROWBAND; + + if (!(rxmask & lodev->txmask)) { + dev_dbg(&dev->dev, "ignoring tx, rx mask mismatch\n"); + goto out; + } + + for (i = 0; i < count; i++) { + rawir.pulse = i % 2 ? false : true; + rawir.duration = txbuf[i]; + + /* simulate overflow if ridiculously long pulse was sent */ + if (rawir.pulse && rawir.duration > MS_TO_US(50)) + ir_raw_event_overflow(dev); + else + ir_raw_event_store_with_filter(dev, &rawir); + } + + if (lodev->carrierreport) { + rawir.pulse = false; + rawir.carrier_report = true; + rawir.carrier = lodev->txcarrier; + + ir_raw_event_store(dev, &rawir); + } + + /* Fake a silence long enough to cause us to go idle */ + rawir.pulse = false; + rawir.duration = dev->timeout; + ir_raw_event_store_with_filter(dev, &rawir); + + ir_raw_event_handle(dev); + +out: + return count; +} + +static void loop_set_idle(struct rc_dev *dev, bool enable) +{ + struct loopback_dev *lodev = dev->priv; + + if (lodev->idle != enable) { + dev_dbg(&dev->dev, "%sing idle mode\n", enable ? "enter" : "exit"); + lodev->idle = enable; + } +} + +static int loop_set_wideband_receiver(struct rc_dev *dev, int enable) +{ + struct loopback_dev *lodev = dev->priv; + + if (lodev->wideband != enable) { + dev_dbg(&dev->dev, "using %sband receiver\n", enable ? "wide" : "narrow"); + lodev->wideband = !!enable; + } + + return 0; +} + +static int loop_set_carrier_report(struct rc_dev *dev, int enable) +{ + struct loopback_dev *lodev = dev->priv; + + if (lodev->carrierreport != enable) { + dev_dbg(&dev->dev, "%sabling carrier reports\n", enable ? "en" : "dis"); + lodev->carrierreport = !!enable; + } + + return 0; +} + +static int loop_set_wakeup_filter(struct rc_dev *dev, + struct rc_scancode_filter *sc) +{ + static const unsigned int max = 512; + struct ir_raw_event *raw; + int ret; + int i; + + /* fine to disable filter */ + if (!sc->mask) + return 0; + + /* encode the specified filter and loop it back */ + raw = kmalloc_array(max, sizeof(*raw), GFP_KERNEL); + if (!raw) + return -ENOMEM; + + ret = ir_raw_encode_scancode(dev->wakeup_protocol, sc->data, raw, max); + /* still loop back the partial raw IR even if it's incomplete */ + if (ret == -ENOBUFS) + ret = max; + if (ret >= 0) { + /* do the loopback */ + for (i = 0; i < ret; ++i) + ir_raw_event_store(dev, &raw[i]); + ir_raw_event_handle(dev); + + ret = 0; + } + + kfree(raw); + + return ret; +} + +static int __init loop_init(void) +{ + struct rc_dev *rc; + int ret; + + rc = rc_allocate_device(RC_DRIVER_IR_RAW); + if (!rc) + return -ENOMEM; + + rc->device_name = "rc-core loopback device"; + rc->input_phys = "rc-core/virtual"; + rc->input_id.bustype = BUS_VIRTUAL; + rc->input_id.version = 1; + rc->driver_name = DRIVER_NAME; + rc->map_name = RC_MAP_EMPTY; + rc->priv = &loopdev; + rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER; + rc->allowed_wakeup_protocols = RC_PROTO_BIT_ALL_IR_ENCODER; + rc->encode_wakeup = true; + rc->timeout = IR_DEFAULT_TIMEOUT; + rc->min_timeout = 1; + rc->max_timeout = IR_MAX_TIMEOUT; + rc->rx_resolution = 1; + rc->tx_resolution = 1; + rc->s_tx_mask = loop_set_tx_mask; + rc->s_tx_carrier = loop_set_tx_carrier; + rc->s_tx_duty_cycle = loop_set_tx_duty_cycle; + rc->s_rx_carrier_range = loop_set_rx_carrier_range; + rc->tx_ir = loop_tx_ir; + rc->s_idle = loop_set_idle; + rc->s_wideband_receiver = loop_set_wideband_receiver; + rc->s_carrier_report = loop_set_carrier_report; + rc->s_wakeup_filter = loop_set_wakeup_filter; + + loopdev.txmask = RXMASK_NARROWBAND; + loopdev.txcarrier = 36000; + loopdev.txduty = 50; + loopdev.rxcarriermin = 1; + loopdev.rxcarriermax = ~0; + loopdev.idle = true; + loopdev.wideband = false; + loopdev.carrierreport = false; + + ret = rc_register_device(rc); + if (ret < 0) { + dev_err(&rc->dev, "rc_dev registration failed\n"); + rc_free_device(rc); + return ret; + } + + loopdev.dev = rc; + return 0; +} + +static void __exit loop_exit(void) +{ + rc_unregister_device(loopdev.dev); +} + +module_init(loop_init); +module_exit(loop_exit); + +MODULE_DESCRIPTION("Loopback device for rc-core debugging"); +MODULE_AUTHOR("David Härdeman "); +MODULE_LICENSE("GPL"); -- cgit v1.2.3