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/gadget/epautoconf.c | 214 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 214 insertions(+) create mode 100644 drivers/usb/gadget/epautoconf.c (limited to 'drivers/usb/gadget/epautoconf.c') diff --git a/drivers/usb/gadget/epautoconf.c b/drivers/usb/gadget/epautoconf.c new file mode 100644 index 000000000..ed5a92c47 --- /dev/null +++ b/drivers/usb/gadget/epautoconf.c @@ -0,0 +1,214 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * epautoconf.c -- endpoint autoconfiguration for usb gadget drivers + * + * Copyright (C) 2004 David Brownell + */ + +#include +#include +#include +#include + +#include +#include + +#include +#include + +/** + * usb_ep_autoconfig_ss() - choose an endpoint matching the ep + * descriptor and ep companion descriptor + * @gadget: The device to which the endpoint must belong. + * @desc: Endpoint descriptor, with endpoint direction and transfer mode + * initialized. For periodic transfers, the maximum packet + * size must also be initialized. This is modified on + * success. + * @ep_comp: Endpoint companion descriptor, with the required + * number of streams. Will be modified when the chosen EP + * supports a different number of streams. + * + * This routine replaces the usb_ep_autoconfig when needed + * superspeed enhancments. If such enhancemnets are required, + * the FD should call usb_ep_autoconfig_ss directly and provide + * the additional ep_comp parameter. + * + * By choosing an endpoint to use with the specified descriptor, + * this routine simplifies writing gadget drivers that work with + * multiple USB device controllers. The endpoint would be + * passed later to usb_ep_enable(), along with some descriptor. + * + * That second descriptor won't always be the same as the first one. + * For example, isochronous endpoints can be autoconfigured for high + * bandwidth, and then used in several lower bandwidth altsettings. + * Also, high and full speed descriptors will be different. + * + * Be sure to examine and test the results of autoconfiguration + * on your hardware. This code may not make the best choices + * about how to use the USB controller, and it can't know all + * the restrictions that may apply. Some combinations of driver + * and hardware won't be able to autoconfigure. + * + * On success, this returns an claimed usb_ep, and modifies the endpoint + * descriptor bEndpointAddress. For bulk endpoints, the wMaxPacket value + * is initialized as if the endpoint were used at full speed and + * the bmAttribute field in the ep companion descriptor is + * updated with the assigned number of streams if it is + * different from the original value. To prevent the endpoint + * from being returned by a later autoconfig call, claims it by + * assigning ep->claimed to true. + * + * On failure, this returns a null endpoint descriptor. + */ +struct usb_ep *usb_ep_autoconfig_ss( + struct usb_gadget *gadget, + struct usb_endpoint_descriptor *desc, + struct usb_ss_ep_comp_descriptor *ep_comp +) +{ + struct usb_ep *ep; + + if (gadget->ops->match_ep) { + ep = gadget->ops->match_ep(gadget, desc, ep_comp); + if (ep) + goto found_ep; + } + + /* Second, look at endpoints until an unclaimed one looks usable */ + list_for_each_entry (ep, &gadget->ep_list, ep_list) { + if (usb_gadget_ep_match_desc(gadget, ep, desc, ep_comp)) + goto found_ep; + } + + /* Fail */ + return NULL; +found_ep: + + /* + * If the protocol driver hasn't yet decided on wMaxPacketSize + * and wants to know the maximum possible, provide the info. + */ + if (desc->wMaxPacketSize == 0) + desc->wMaxPacketSize = cpu_to_le16(ep->maxpacket_limit); + + /* report address */ + desc->bEndpointAddress &= USB_DIR_IN; + if (isdigit(ep->name[2])) { + u8 num = simple_strtoul(&ep->name[2], NULL, 10); + desc->bEndpointAddress |= num; + } else if (desc->bEndpointAddress & USB_DIR_IN) { + if (++gadget->in_epnum > 15) + return NULL; + desc->bEndpointAddress = USB_DIR_IN | gadget->in_epnum; + } else { + if (++gadget->out_epnum > 15) + return NULL; + desc->bEndpointAddress |= gadget->out_epnum; + } + + ep->address = desc->bEndpointAddress; + ep->desc = NULL; + ep->comp_desc = NULL; + ep->claimed = true; + return ep; +} +EXPORT_SYMBOL_GPL(usb_ep_autoconfig_ss); + +/** + * usb_ep_autoconfig() - choose an endpoint matching the + * descriptor + * @gadget: The device to which the endpoint must belong. + * @desc: Endpoint descriptor, with endpoint direction and transfer mode + * initialized. For periodic transfers, the maximum packet + * size must also be initialized. This is modified on success. + * + * By choosing an endpoint to use with the specified descriptor, this + * routine simplifies writing gadget drivers that work with multiple + * USB device controllers. The endpoint would be passed later to + * usb_ep_enable(), along with some descriptor. + * + * That second descriptor won't always be the same as the first one. + * For example, isochronous endpoints can be autoconfigured for high + * bandwidth, and then used in several lower bandwidth altsettings. + * Also, high and full speed descriptors will be different. + * + * Be sure to examine and test the results of autoconfiguration on your + * hardware. This code may not make the best choices about how to use the + * USB controller, and it can't know all the restrictions that may apply. + * Some combinations of driver and hardware won't be able to autoconfigure. + * + * On success, this returns an claimed usb_ep, and modifies the endpoint + * descriptor bEndpointAddress. For bulk endpoints, the wMaxPacket value + * is initialized as if the endpoint were used at full speed. Because of + * that the users must consider adjusting the autoconfigured descriptor. + * To prevent the endpoint from being returned by a later autoconfig call, + * claims it by assigning ep->claimed to true. + * + * On failure, this returns a null endpoint descriptor. + */ +struct usb_ep *usb_ep_autoconfig( + struct usb_gadget *gadget, + struct usb_endpoint_descriptor *desc +) +{ + struct usb_ep *ep; + u8 type; + + ep = usb_ep_autoconfig_ss(gadget, desc, NULL); + if (!ep) + return NULL; + + type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; + + /* report (variable) full speed bulk maxpacket */ + if (type == USB_ENDPOINT_XFER_BULK) { + int size = ep->maxpacket_limit; + + /* min() doesn't work on bitfields with gcc-3.5 */ + if (size > 64) + size = 64; + desc->wMaxPacketSize = cpu_to_le16(size); + } + + return ep; +} +EXPORT_SYMBOL_GPL(usb_ep_autoconfig); + +/** + * usb_ep_autoconfig_release - releases endpoint and set it to initial state + * @ep: endpoint which should be released + * + * This function can be used during function bind for endpoints obtained + * from usb_ep_autoconfig(). It unclaims endpoint claimed by + * usb_ep_autoconfig() to make it available for other functions. Endpoint + * which was released is no longer valid and shouldn't be used in + * context of function which released it. + */ +void usb_ep_autoconfig_release(struct usb_ep *ep) +{ + ep->claimed = false; + ep->driver_data = NULL; +} +EXPORT_SYMBOL_GPL(usb_ep_autoconfig_release); + +/** + * usb_ep_autoconfig_reset - reset endpoint autoconfig state + * @gadget: device for which autoconfig state will be reset + * + * Use this for devices where one configuration may need to assign + * endpoint resources very differently from the next one. It clears + * state such as ep->claimed and the record of assigned endpoints + * used by usb_ep_autoconfig(). + */ +void usb_ep_autoconfig_reset (struct usb_gadget *gadget) +{ + struct usb_ep *ep; + + list_for_each_entry (ep, &gadget->ep_list, ep_list) { + ep->claimed = false; + ep->driver_data = NULL; + } + gadget->in_epnum = 0; + gadget->out_epnum = 0; +} +EXPORT_SYMBOL_GPL(usb_ep_autoconfig_reset); -- cgit v1.2.3