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/net/usb/cdc_subset.c | 357 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 357 insertions(+) create mode 100644 drivers/net/usb/cdc_subset.c (limited to 'drivers/net/usb/cdc_subset.c') diff --git a/drivers/net/usb/cdc_subset.c b/drivers/net/usb/cdc_subset.c new file mode 100644 index 000000000..f4a44f05c --- /dev/null +++ b/drivers/net/usb/cdc_subset.c @@ -0,0 +1,357 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Simple "CDC Subset" USB Networking Links + * Copyright (C) 2000-2005 by David Brownell + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + + +/* + * This supports simple USB network links that don't require any special + * framing or hardware control operations. The protocol used here is a + * strict subset of CDC Ethernet, with three basic differences reflecting + * the goal that almost any hardware should run it: + * + * - Minimal runtime control: one interface, no altsettings, and + * no vendor or class specific control requests. If a device is + * configured, it is allowed to exchange packets with the host. + * Fancier models would mean not working on some hardware. + * + * - Minimal manufacturing control: no IEEE "Organizationally + * Unique ID" required, or an EEPROMs to store one. Each host uses + * one random "locally assigned" Ethernet address instead, which can + * of course be overridden using standard tools like "ifconfig". + * (With 2^46 such addresses, same-net collisions are quite rare.) + * + * - There is no additional framing data for USB. Packets are written + * exactly as in CDC Ethernet, starting with an Ethernet header and + * terminated by a short packet. However, the host will never send a + * zero length packet; some systems can't handle those robustly. + * + * Anything that can transmit and receive USB bulk packets can implement + * this protocol. That includes both smart peripherals and quite a lot + * of "host-to-host" USB cables (which embed two devices back-to-back). + * + * Note that although Linux may use many of those host-to-host links + * with this "cdc_subset" framing, that doesn't mean there may not be a + * better approach. Handling the "other end unplugs/replugs" scenario + * well tends to require chip-specific vendor requests. Also, Windows + * peers at the other end of host-to-host cables may expect their own + * framing to be used rather than this "cdc_subset" model. + */ + +#if defined(CONFIG_USB_EPSON2888) || defined(CONFIG_USB_ARMLINUX) +/* PDA style devices are always connected if present */ +static int always_connected (struct usbnet *dev) +{ + return 0; +} +#endif + +#ifdef CONFIG_USB_ALI_M5632 +#define HAVE_HARDWARE + +/*------------------------------------------------------------------------- + * + * ALi M5632 driver ... does high speed + * + * NOTE that the MS-Windows drivers for this chip use some funky and + * (naturally) undocumented 7-byte prefix to each packet, so this is a + * case where we don't currently interoperate. Also, once you unplug + * one end of the cable, you need to replug the other end too ... since + * chip docs are unavailable, there's no way to reset the relevant state + * short of a power cycle. + * + *-------------------------------------------------------------------------*/ + +static void m5632_recover(struct usbnet *dev) +{ + struct usb_device *udev = dev->udev; + struct usb_interface *intf = dev->intf; + int r; + + r = usb_lock_device_for_reset(udev, intf); + if (r < 0) + return; + + usb_reset_device(udev); + usb_unlock_device(udev); +} + +static const struct driver_info ali_m5632_info = { + .description = "ALi M5632", + .flags = FLAG_POINTTOPOINT, + .recover = m5632_recover, +}; + +#endif + +#ifdef CONFIG_USB_AN2720 +#define HAVE_HARDWARE + +/*------------------------------------------------------------------------- + * + * AnchorChips 2720 driver ... http://www.cypress.com + * + * This doesn't seem to have a way to detect whether the peer is + * connected, or need any reset handshaking. It's got pretty big + * internal buffers (handles most of a frame's worth of data). + * Chip data sheets don't describe any vendor control messages. + * + *-------------------------------------------------------------------------*/ + +static const struct driver_info an2720_info = { + .description = "AnchorChips/Cypress 2720", + .flags = FLAG_POINTTOPOINT, + // no reset available! + // no check_connect available! + + .in = 2, .out = 2, // direction distinguishes these +}; + +#endif /* CONFIG_USB_AN2720 */ + + +#ifdef CONFIG_USB_BELKIN +#define HAVE_HARDWARE + +/*------------------------------------------------------------------------- + * + * Belkin F5U104 ... two NetChip 2280 devices + Atmel AVR microcontroller + * + * ... also two eTEK designs, including one sold as "Advance USBNET" + * + *-------------------------------------------------------------------------*/ + +static const struct driver_info belkin_info = { + .description = "Belkin, eTEK, or compatible", + .flags = FLAG_POINTTOPOINT, +}; + +#endif /* CONFIG_USB_BELKIN */ + + + +#ifdef CONFIG_USB_EPSON2888 +#define HAVE_HARDWARE + +/*------------------------------------------------------------------------- + * + * EPSON USB clients + * + * This is the same idea as Linux PDAs (below) except the firmware in the + * device might not be Tux-powered. Epson provides reference firmware that + * implements this interface. Product developers can reuse or modify that + * code, such as by using their own product and vendor codes. + * + * Support was from Juro Bystricky + * + *-------------------------------------------------------------------------*/ + +static const struct driver_info epson2888_info = { + .description = "Epson USB Device", + .check_connect = always_connected, + .flags = FLAG_POINTTOPOINT, + + .in = 4, .out = 3, +}; + +#endif /* CONFIG_USB_EPSON2888 */ + + +/*------------------------------------------------------------------------- + * + * info from Jonathan McDowell + * + *-------------------------------------------------------------------------*/ +#ifdef CONFIG_USB_KC2190 +#define HAVE_HARDWARE +static const struct driver_info kc2190_info = { + .description = "KC Technology KC-190", + .flags = FLAG_POINTTOPOINT, +}; +#endif /* CONFIG_USB_KC2190 */ + + +#ifdef CONFIG_USB_ARMLINUX +#define HAVE_HARDWARE + +/*------------------------------------------------------------------------- + * + * Intel's SA-1100 chip integrates basic USB support, and is used + * in PDAs like some iPaqs, the Yopy, some Zaurus models, and more. + * When they run Linux, arch/arm/mach-sa1100/usb-eth.c may be used to + * network using minimal USB framing data. + * + * This describes the driver currently in standard ARM Linux kernels. + * The Zaurus uses a different driver (see later). + * + * PXA25x and PXA210 use XScale cores (ARM v5TE) with better USB support + * and different USB endpoint numbering than the SA1100 devices. The + * mach-pxa/usb-eth.c driver re-uses the device ids from mach-sa1100 + * so we rely on the endpoint descriptors. + * + *-------------------------------------------------------------------------*/ + +static const struct driver_info linuxdev_info = { + .description = "Linux Device", + .check_connect = always_connected, + .flags = FLAG_POINTTOPOINT, +}; + +static const struct driver_info yopy_info = { + .description = "Yopy", + .check_connect = always_connected, + .flags = FLAG_POINTTOPOINT, +}; + +static const struct driver_info blob_info = { + .description = "Boot Loader OBject", + .check_connect = always_connected, + .flags = FLAG_POINTTOPOINT, +}; + +#endif /* CONFIG_USB_ARMLINUX */ + + +/*-------------------------------------------------------------------------*/ + +#ifndef HAVE_HARDWARE +#warning You need to configure some hardware for this driver +#endif + +/* + * chip vendor names won't normally be on the cables, and + * may not be on the device. + */ + +static const struct usb_device_id products [] = { + +#ifdef CONFIG_USB_ALI_M5632 +{ + USB_DEVICE (0x0402, 0x5632), // ALi defaults + .driver_info = (unsigned long) &ali_m5632_info, +}, +{ + USB_DEVICE (0x182d,0x207c), // SiteCom CN-124 + .driver_info = (unsigned long) &ali_m5632_info, +}, +#endif + +#ifdef CONFIG_USB_AN2720 +{ + USB_DEVICE (0x0547, 0x2720), // AnchorChips defaults + .driver_info = (unsigned long) &an2720_info, +}, { + USB_DEVICE (0x0547, 0x2727), // Xircom PGUNET + .driver_info = (unsigned long) &an2720_info, +}, +#endif + +#ifdef CONFIG_USB_BELKIN +{ + USB_DEVICE (0x050d, 0x0004), // Belkin + .driver_info = (unsigned long) &belkin_info, +}, { + USB_DEVICE (0x056c, 0x8100), // eTEK + .driver_info = (unsigned long) &belkin_info, +}, { + USB_DEVICE (0x0525, 0x9901), // Advance USBNET (eTEK) + .driver_info = (unsigned long) &belkin_info, +}, +#endif + +#ifdef CONFIG_USB_EPSON2888 +{ + USB_DEVICE (0x0525, 0x2888), // EPSON USB client + .driver_info = (unsigned long) &epson2888_info, +}, +#endif + +#ifdef CONFIG_USB_KC2190 +{ + USB_DEVICE (0x050f, 0x0190), // KC-190 + .driver_info = (unsigned long) &kc2190_info, +}, +#endif + +#ifdef CONFIG_USB_ARMLINUX +/* + * SA-1100 using standard ARM Linux kernels, or compatible. + * Often used when talking to Linux PDAs (iPaq, Yopy, etc). + * The sa-1100 "usb-eth" driver handles the basic framing. + * + * PXA25x or PXA210 ... these use a "usb-eth" driver much like + * the sa1100 one, but hardware uses different endpoint numbers. + * + * Or the Linux "Ethernet" gadget on hardware that can't talk + * CDC Ethernet (e.g., no altsettings), in either of two modes: + * - acting just like the old "usb-eth" firmware, though + * the implementation is different + * - supporting RNDIS as the first/default configuration for + * MS-Windows interop; Linux needs to use the other config + */ +{ + // 1183 = 0x049F, both used as hex values? + // Compaq "Itsy" vendor/product id + USB_DEVICE (0x049F, 0x505A), // usb-eth, or compatible + .driver_info = (unsigned long) &linuxdev_info, +}, { + USB_DEVICE (0x0E7E, 0x1001), // G.Mate "Yopy" + .driver_info = (unsigned long) &yopy_info, +}, { + USB_DEVICE (0x8086, 0x07d3), // "blob" bootloader + .driver_info = (unsigned long) &blob_info, +}, { + USB_DEVICE (0x1286, 0x8001), // "blob" bootloader + .driver_info = (unsigned long) &blob_info, +}, { + // Linux Ethernet/RNDIS gadget, mostly on PXA, second config + // e.g. Gumstix, current OpenZaurus, ... or anything else + // that just enables this gadget option. + USB_DEVICE (0x0525, 0xa4a2), + .driver_info = (unsigned long) &linuxdev_info, +}, +#endif + + { }, // END +}; +MODULE_DEVICE_TABLE(usb, products); + +/*-------------------------------------------------------------------------*/ +static int dummy_prereset(struct usb_interface *intf) +{ + return 0; +} + +static int dummy_postreset(struct usb_interface *intf) +{ + return 0; +} + +static struct usb_driver cdc_subset_driver = { + .name = "cdc_subset", + .probe = usbnet_probe, + .suspend = usbnet_suspend, + .resume = usbnet_resume, + .pre_reset = dummy_prereset, + .post_reset = dummy_postreset, + .disconnect = usbnet_disconnect, + .id_table = products, + .disable_hub_initiated_lpm = 1, +}; + +module_usb_driver(cdc_subset_driver); + +MODULE_AUTHOR("David Brownell"); +MODULE_DESCRIPTION("Simple 'CDC Subset' USB networking links"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3