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/huawei_cdc_ncm.c | 227 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 227 insertions(+) create mode 100644 drivers/net/usb/huawei_cdc_ncm.c (limited to 'drivers/net/usb/huawei_cdc_ncm.c') diff --git a/drivers/net/usb/huawei_cdc_ncm.c b/drivers/net/usb/huawei_cdc_ncm.c new file mode 100644 index 000000000..849b77330 --- /dev/null +++ b/drivers/net/usb/huawei_cdc_ncm.c @@ -0,0 +1,227 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* huawei_cdc_ncm.c - handles Huawei devices using the CDC NCM protocol as + * transport layer. + * Copyright (C) 2013 Enrico Mioso + * + * ABSTRACT: + * This driver handles devices resembling the CDC NCM standard, but + * encapsulating another protocol inside it. An example are some Huawei 3G + * devices, exposing an embedded AT channel where you can set up the NCM + * connection. + * This code has been heavily inspired by the cdc_mbim.c driver, which is + * Copyright (c) 2012 Smith Micro Software, Inc. + * Copyright (c) 2012 Bjørn Mork + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Driver data */ +struct huawei_cdc_ncm_state { + struct cdc_ncm_ctx *ctx; + atomic_t pmcount; + struct usb_driver *subdriver; + struct usb_interface *control; + struct usb_interface *data; +}; + +static int huawei_cdc_ncm_manage_power(struct usbnet *usbnet_dev, int on) +{ + struct huawei_cdc_ncm_state *drvstate = (void *)&usbnet_dev->data; + int rv; + + if ((on && atomic_add_return(1, &drvstate->pmcount) == 1) || + (!on && atomic_dec_and_test(&drvstate->pmcount))) { + rv = usb_autopm_get_interface(usbnet_dev->intf); + usbnet_dev->intf->needs_remote_wakeup = on; + if (!rv) + usb_autopm_put_interface(usbnet_dev->intf); + } + return 0; +} + +static int huawei_cdc_ncm_wdm_manage_power(struct usb_interface *intf, + int status) +{ + struct usbnet *usbnet_dev = usb_get_intfdata(intf); + + /* can be called while disconnecting */ + if (!usbnet_dev) + return 0; + + return huawei_cdc_ncm_manage_power(usbnet_dev, status); +} + + +static int huawei_cdc_ncm_bind(struct usbnet *usbnet_dev, + struct usb_interface *intf) +{ + struct cdc_ncm_ctx *ctx; + struct usb_driver *subdriver = ERR_PTR(-ENODEV); + int ret; + struct huawei_cdc_ncm_state *drvstate = (void *)&usbnet_dev->data; + int drvflags = 0; + + /* altsetting should always be 1 for NCM devices - so we hard-coded + * it here. Some huawei devices will need the NDP part of the NCM package to + * be at the end of the frame. + */ + drvflags |= CDC_NCM_FLAG_NDP_TO_END; + + /* For many Huawei devices the NTB32 mode is the default and the best mode + * they work with. Huawei E5785 and E5885 devices refuse to work in NTB16 mode at all. + */ + drvflags |= CDC_NCM_FLAG_PREFER_NTB32; + + ret = cdc_ncm_bind_common(usbnet_dev, intf, 1, drvflags); + if (ret) + goto err; + + ctx = drvstate->ctx; + + if (usbnet_dev->status) + /* The wMaxCommand buffer must be big enough to hold + * any message from the modem. Experience has shown + * that some replies are more than 256 bytes long + */ + subdriver = usb_cdc_wdm_register(ctx->control, + &usbnet_dev->status->desc, + 1024, /* wMaxCommand */ + WWAN_PORT_AT, + huawei_cdc_ncm_wdm_manage_power); + if (IS_ERR(subdriver)) { + ret = PTR_ERR(subdriver); + cdc_ncm_unbind(usbnet_dev, intf); + goto err; + } + + /* Prevent usbnet from using the status descriptor */ + usbnet_dev->status = NULL; + + drvstate->subdriver = subdriver; + +err: + return ret; +} + +static void huawei_cdc_ncm_unbind(struct usbnet *usbnet_dev, + struct usb_interface *intf) +{ + struct huawei_cdc_ncm_state *drvstate = (void *)&usbnet_dev->data; + struct cdc_ncm_ctx *ctx = drvstate->ctx; + + if (drvstate->subdriver && drvstate->subdriver->disconnect) + drvstate->subdriver->disconnect(ctx->control); + drvstate->subdriver = NULL; + + cdc_ncm_unbind(usbnet_dev, intf); +} + +static int huawei_cdc_ncm_suspend(struct usb_interface *intf, + pm_message_t message) +{ + int ret = 0; + struct usbnet *usbnet_dev = usb_get_intfdata(intf); + struct huawei_cdc_ncm_state *drvstate = (void *)&usbnet_dev->data; + struct cdc_ncm_ctx *ctx = drvstate->ctx; + + if (ctx == NULL) { + ret = -ENODEV; + goto error; + } + + ret = usbnet_suspend(intf, message); + if (ret < 0) + goto error; + + if (intf == ctx->control && + drvstate->subdriver && + drvstate->subdriver->suspend) + ret = drvstate->subdriver->suspend(intf, message); + if (ret < 0) + usbnet_resume(intf); + +error: + return ret; +} + +static int huawei_cdc_ncm_resume(struct usb_interface *intf) +{ + int ret = 0; + struct usbnet *usbnet_dev = usb_get_intfdata(intf); + struct huawei_cdc_ncm_state *drvstate = (void *)&usbnet_dev->data; + bool callsub; + struct cdc_ncm_ctx *ctx = drvstate->ctx; + + /* should we call subdriver's resume function? */ + callsub = + (intf == ctx->control && + drvstate->subdriver && + drvstate->subdriver->resume); + + if (callsub) + ret = drvstate->subdriver->resume(intf); + if (ret < 0) + goto err; + ret = usbnet_resume(intf); + if (ret < 0 && callsub) + drvstate->subdriver->suspend(intf, PMSG_SUSPEND); +err: + return ret; +} + +static const struct driver_info huawei_cdc_ncm_info = { + .description = "Huawei CDC NCM device", + .flags = FLAG_NO_SETINT | FLAG_MULTI_PACKET | FLAG_WWAN, + .bind = huawei_cdc_ncm_bind, + .unbind = huawei_cdc_ncm_unbind, + .manage_power = huawei_cdc_ncm_manage_power, + .rx_fixup = cdc_ncm_rx_fixup, + .tx_fixup = cdc_ncm_tx_fixup, +}; + +static const struct usb_device_id huawei_cdc_ncm_devs[] = { + /* Huawei NCM devices disguised as vendor specific */ + { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x16), + .driver_info = (unsigned long)&huawei_cdc_ncm_info, + }, + { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x46), + .driver_info = (unsigned long)&huawei_cdc_ncm_info, + }, + { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x02, 0x76), + .driver_info = (unsigned long)&huawei_cdc_ncm_info, + }, + { USB_VENDOR_AND_INTERFACE_INFO(0x12d1, 0xff, 0x03, 0x16), + .driver_info = (unsigned long)&huawei_cdc_ncm_info, + }, + + /* Terminating entry */ + { + }, +}; +MODULE_DEVICE_TABLE(usb, huawei_cdc_ncm_devs); + +static struct usb_driver huawei_cdc_ncm_driver = { + .name = "huawei_cdc_ncm", + .id_table = huawei_cdc_ncm_devs, + .probe = usbnet_probe, + .disconnect = usbnet_disconnect, + .suspend = huawei_cdc_ncm_suspend, + .resume = huawei_cdc_ncm_resume, + .reset_resume = huawei_cdc_ncm_resume, + .supports_autosuspend = 1, + .disable_hub_initiated_lpm = 1, +}; +module_usb_driver(huawei_cdc_ncm_driver); +MODULE_AUTHOR("Enrico Mioso "); +MODULE_DESCRIPTION("USB CDC NCM host driver with encapsulated protocol support"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3