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/usb/common/common.c | 435 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 435 insertions(+) create mode 100644 drivers/usb/common/common.c (limited to 'drivers/usb/common/common.c') diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c new file mode 100644 index 000000000..c9bdeb4dd --- /dev/null +++ b/drivers/usb/common/common.c @@ -0,0 +1,435 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Provides code common for host and device side USB. + * + * If either host side (ie. CONFIG_USB=y) or device side USB stack + * (ie. CONFIG_USB_GADGET=y) is compiled in the kernel, this module is + * compiled-in as well. Otherwise, if either of the two stacks is + * compiled as module, this file is compiled as module as well. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include "common.h" + +static const char *const ep_type_names[] = { + [USB_ENDPOINT_XFER_CONTROL] = "ctrl", + [USB_ENDPOINT_XFER_ISOC] = "isoc", + [USB_ENDPOINT_XFER_BULK] = "bulk", + [USB_ENDPOINT_XFER_INT] = "intr", +}; + +/** + * usb_ep_type_string() - Returns human readable-name of the endpoint type. + * @ep_type: The endpoint type to return human-readable name for. If it's not + * any of the types: USB_ENDPOINT_XFER_{CONTROL, ISOC, BULK, INT}, + * usually got by usb_endpoint_type(), the string 'unknown' will be returned. + */ +const char *usb_ep_type_string(int ep_type) +{ + if (ep_type < 0 || ep_type >= ARRAY_SIZE(ep_type_names)) + return "unknown"; + + return ep_type_names[ep_type]; +} +EXPORT_SYMBOL_GPL(usb_ep_type_string); + +const char *usb_otg_state_string(enum usb_otg_state state) +{ + static const char *const names[] = { + [OTG_STATE_A_IDLE] = "a_idle", + [OTG_STATE_A_WAIT_VRISE] = "a_wait_vrise", + [OTG_STATE_A_WAIT_BCON] = "a_wait_bcon", + [OTG_STATE_A_HOST] = "a_host", + [OTG_STATE_A_SUSPEND] = "a_suspend", + [OTG_STATE_A_PERIPHERAL] = "a_peripheral", + [OTG_STATE_A_WAIT_VFALL] = "a_wait_vfall", + [OTG_STATE_A_VBUS_ERR] = "a_vbus_err", + [OTG_STATE_B_IDLE] = "b_idle", + [OTG_STATE_B_SRP_INIT] = "b_srp_init", + [OTG_STATE_B_PERIPHERAL] = "b_peripheral", + [OTG_STATE_B_WAIT_ACON] = "b_wait_acon", + [OTG_STATE_B_HOST] = "b_host", + }; + + if (state < 0 || state >= ARRAY_SIZE(names)) + return "UNDEFINED"; + + return names[state]; +} +EXPORT_SYMBOL_GPL(usb_otg_state_string); + +static const char *const speed_names[] = { + [USB_SPEED_UNKNOWN] = "UNKNOWN", + [USB_SPEED_LOW] = "low-speed", + [USB_SPEED_FULL] = "full-speed", + [USB_SPEED_HIGH] = "high-speed", + [USB_SPEED_WIRELESS] = "wireless", + [USB_SPEED_SUPER] = "super-speed", + [USB_SPEED_SUPER_PLUS] = "super-speed-plus", +}; + +static const char *const ssp_rate[] = { + [USB_SSP_GEN_UNKNOWN] = "UNKNOWN", + [USB_SSP_GEN_2x1] = "super-speed-plus-gen2x1", + [USB_SSP_GEN_1x2] = "super-speed-plus-gen1x2", + [USB_SSP_GEN_2x2] = "super-speed-plus-gen2x2", +}; + +/** + * usb_speed_string() - Returns human readable-name of the speed. + * @speed: The speed to return human-readable name for. If it's not + * any of the speeds defined in usb_device_speed enum, string for + * USB_SPEED_UNKNOWN will be returned. + */ +const char *usb_speed_string(enum usb_device_speed speed) +{ + if (speed < 0 || speed >= ARRAY_SIZE(speed_names)) + speed = USB_SPEED_UNKNOWN; + return speed_names[speed]; +} +EXPORT_SYMBOL_GPL(usb_speed_string); + +/** + * usb_get_maximum_speed - Get maximum requested speed for a given USB + * controller. + * @dev: Pointer to the given USB controller device + * + * The function gets the maximum speed string from property "maximum-speed", + * and returns the corresponding enum usb_device_speed. + */ +enum usb_device_speed usb_get_maximum_speed(struct device *dev) +{ + const char *maximum_speed; + int ret; + + ret = device_property_read_string(dev, "maximum-speed", &maximum_speed); + if (ret < 0) + return USB_SPEED_UNKNOWN; + + ret = match_string(ssp_rate, ARRAY_SIZE(ssp_rate), maximum_speed); + if (ret > 0) + return USB_SPEED_SUPER_PLUS; + + ret = match_string(speed_names, ARRAY_SIZE(speed_names), maximum_speed); + return (ret < 0) ? USB_SPEED_UNKNOWN : ret; +} +EXPORT_SYMBOL_GPL(usb_get_maximum_speed); + +/** + * usb_get_maximum_ssp_rate - Get the signaling rate generation and lane count + * of a SuperSpeed Plus capable device. + * @dev: Pointer to the given USB controller device + * + * If the string from "maximum-speed" property is super-speed-plus-genXxY where + * 'X' is the generation number and 'Y' is the number of lanes, then this + * function returns the corresponding enum usb_ssp_rate. + */ +enum usb_ssp_rate usb_get_maximum_ssp_rate(struct device *dev) +{ + const char *maximum_speed; + int ret; + + ret = device_property_read_string(dev, "maximum-speed", &maximum_speed); + if (ret < 0) + return USB_SSP_GEN_UNKNOWN; + + ret = match_string(ssp_rate, ARRAY_SIZE(ssp_rate), maximum_speed); + return (ret < 0) ? USB_SSP_GEN_UNKNOWN : ret; +} +EXPORT_SYMBOL_GPL(usb_get_maximum_ssp_rate); + +/** + * usb_state_string - Returns human readable name for the state. + * @state: The state to return a human-readable name for. If it's not + * any of the states devices in usb_device_state_string enum, + * the string UNKNOWN will be returned. + */ +const char *usb_state_string(enum usb_device_state state) +{ + static const char *const names[] = { + [USB_STATE_NOTATTACHED] = "not attached", + [USB_STATE_ATTACHED] = "attached", + [USB_STATE_POWERED] = "powered", + [USB_STATE_RECONNECTING] = "reconnecting", + [USB_STATE_UNAUTHENTICATED] = "unauthenticated", + [USB_STATE_DEFAULT] = "default", + [USB_STATE_ADDRESS] = "addressed", + [USB_STATE_CONFIGURED] = "configured", + [USB_STATE_SUSPENDED] = "suspended", + }; + + if (state < 0 || state >= ARRAY_SIZE(names)) + return "UNKNOWN"; + + return names[state]; +} +EXPORT_SYMBOL_GPL(usb_state_string); + +static const char *const usb_dr_modes[] = { + [USB_DR_MODE_UNKNOWN] = "", + [USB_DR_MODE_HOST] = "host", + [USB_DR_MODE_PERIPHERAL] = "peripheral", + [USB_DR_MODE_OTG] = "otg", +}; + +static enum usb_dr_mode usb_get_dr_mode_from_string(const char *str) +{ + int ret; + + ret = match_string(usb_dr_modes, ARRAY_SIZE(usb_dr_modes), str); + return (ret < 0) ? USB_DR_MODE_UNKNOWN : ret; +} + +enum usb_dr_mode usb_get_dr_mode(struct device *dev) +{ + const char *dr_mode; + int err; + + err = device_property_read_string(dev, "dr_mode", &dr_mode); + if (err < 0) + return USB_DR_MODE_UNKNOWN; + + return usb_get_dr_mode_from_string(dr_mode); +} +EXPORT_SYMBOL_GPL(usb_get_dr_mode); + +/** + * usb_get_role_switch_default_mode - Get default mode for given device + * @dev: Pointer to the given device + * + * The function gets string from property 'role-switch-default-mode', + * and returns the corresponding enum usb_dr_mode. + */ +enum usb_dr_mode usb_get_role_switch_default_mode(struct device *dev) +{ + const char *str; + int ret; + + ret = device_property_read_string(dev, "role-switch-default-mode", &str); + if (ret < 0) + return USB_DR_MODE_UNKNOWN; + + return usb_get_dr_mode_from_string(str); +} +EXPORT_SYMBOL_GPL(usb_get_role_switch_default_mode); + +/** + * usb_decode_interval - Decode bInterval into the time expressed in 1us unit + * @epd: The descriptor of the endpoint + * @speed: The speed that the endpoint works as + * + * Function returns the interval expressed in 1us unit for servicing + * endpoint for data transfers. + */ +unsigned int usb_decode_interval(const struct usb_endpoint_descriptor *epd, + enum usb_device_speed speed) +{ + unsigned int interval = 0; + + switch (usb_endpoint_type(epd)) { + case USB_ENDPOINT_XFER_CONTROL: + /* uframes per NAK */ + if (speed == USB_SPEED_HIGH) + interval = epd->bInterval; + break; + case USB_ENDPOINT_XFER_ISOC: + interval = 1 << (epd->bInterval - 1); + break; + case USB_ENDPOINT_XFER_BULK: + /* uframes per NAK */ + if (speed == USB_SPEED_HIGH && usb_endpoint_dir_out(epd)) + interval = epd->bInterval; + break; + case USB_ENDPOINT_XFER_INT: + if (speed >= USB_SPEED_HIGH) + interval = 1 << (epd->bInterval - 1); + else + interval = epd->bInterval; + break; + } + + interval *= (speed >= USB_SPEED_HIGH) ? 125 : 1000; + + return interval; +} +EXPORT_SYMBOL_GPL(usb_decode_interval); + +#ifdef CONFIG_OF +/** + * of_usb_get_dr_mode_by_phy - Get dual role mode for the controller device + * which is associated with the given phy device_node + * @np: Pointer to the given phy device_node + * @arg0: phandle args[0] for phy's with #phy-cells >= 1, or -1 for + * phys which do not have phy-cells + * + * In dts a usb controller associates with phy devices. The function gets + * the string from property 'dr_mode' of the controller associated with the + * given phy device node, and returns the correspondig enum usb_dr_mode. + */ +enum usb_dr_mode of_usb_get_dr_mode_by_phy(struct device_node *np, int arg0) +{ + struct device_node *controller = NULL; + struct of_phandle_args args; + const char *dr_mode; + int index; + int err; + + do { + controller = of_find_node_with_property(controller, "phys"); + if (!of_device_is_available(controller)) + continue; + index = 0; + do { + if (arg0 == -1) { + args.np = of_parse_phandle(controller, "phys", + index); + args.args_count = 0; + } else { + err = of_parse_phandle_with_args(controller, + "phys", "#phy-cells", + index, &args); + if (err) + break; + } + + of_node_put(args.np); + if (args.np == np && (args.args_count == 0 || + args.args[0] == arg0)) + goto finish; + index++; + } while (args.np); + } while (controller); + +finish: + err = of_property_read_string(controller, "dr_mode", &dr_mode); + of_node_put(controller); + + if (err < 0) + return USB_DR_MODE_UNKNOWN; + + return usb_get_dr_mode_from_string(dr_mode); +} +EXPORT_SYMBOL_GPL(of_usb_get_dr_mode_by_phy); + +/** + * of_usb_host_tpl_support - to get if Targeted Peripheral List is supported + * for given targeted hosts (non-PC hosts) + * @np: Pointer to the given device_node + * + * The function gets if the targeted hosts support TPL or not + */ +bool of_usb_host_tpl_support(struct device_node *np) +{ + return of_property_read_bool(np, "tpl-support"); +} +EXPORT_SYMBOL_GPL(of_usb_host_tpl_support); + +/** + * of_usb_update_otg_caps - to update usb otg capabilities according to + * the passed properties in DT. + * @np: Pointer to the given device_node + * @otg_caps: Pointer to the target usb_otg_caps to be set + * + * The function updates the otg capabilities + */ +int of_usb_update_otg_caps(struct device_node *np, + struct usb_otg_caps *otg_caps) +{ + u32 otg_rev; + + if (!otg_caps) + return -EINVAL; + + if (!of_property_read_u32(np, "otg-rev", &otg_rev)) { + switch (otg_rev) { + case 0x0100: + case 0x0120: + case 0x0130: + case 0x0200: + /* Choose the lesser one if it's already been set */ + if (otg_caps->otg_rev) + otg_caps->otg_rev = min_t(u16, otg_rev, + otg_caps->otg_rev); + else + otg_caps->otg_rev = otg_rev; + break; + default: + pr_err("%pOF: unsupported otg-rev: 0x%x\n", + np, otg_rev); + return -EINVAL; + } + } else { + /* + * otg-rev is mandatory for otg properties, if not passed + * we set it to be 0 and assume it's a legacy otg device. + * Non-dt platform can set it afterwards. + */ + otg_caps->otg_rev = 0; + } + + if (of_property_read_bool(np, "hnp-disable")) + otg_caps->hnp_support = false; + if (of_property_read_bool(np, "srp-disable")) + otg_caps->srp_support = false; + if (of_property_read_bool(np, "adp-disable") || + (otg_caps->otg_rev < 0x0200)) + otg_caps->adp_support = false; + + return 0; +} +EXPORT_SYMBOL_GPL(of_usb_update_otg_caps); + +/** + * usb_of_get_companion_dev - Find the companion device + * @dev: the device pointer to find a companion + * + * Find the companion device from platform bus. + * + * Takes a reference to the returned struct device which needs to be dropped + * after use. + * + * Return: On success, a pointer to the companion device, %NULL on failure. + */ +struct device *usb_of_get_companion_dev(struct device *dev) +{ + struct device_node *node; + struct platform_device *pdev = NULL; + + node = of_parse_phandle(dev->of_node, "companion", 0); + if (node) + pdev = of_find_device_by_node(node); + + of_node_put(node); + + return pdev ? &pdev->dev : NULL; +} +EXPORT_SYMBOL_GPL(usb_of_get_companion_dev); +#endif + +struct dentry *usb_debug_root; +EXPORT_SYMBOL_GPL(usb_debug_root); + +static int __init usb_common_init(void) +{ + usb_debug_root = debugfs_create_dir("usb", NULL); + ledtrig_usb_init(); + return 0; +} + +static void __exit usb_common_exit(void) +{ + ledtrig_usb_exit(); + debugfs_remove_recursive(usb_debug_root); +} + +subsys_initcall(usb_common_init); +module_exit(usb_common_exit); + +MODULE_LICENSE("GPL"); -- cgit v1.2.3