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/usb/uvc/uvc_status.c | 313 +++++++++++++++++++++++++++++++++++++ 1 file changed, 313 insertions(+) create mode 100644 drivers/media/usb/uvc/uvc_status.c (limited to 'drivers/media/usb/uvc/uvc_status.c') diff --git a/drivers/media/usb/uvc/uvc_status.c b/drivers/media/usb/uvc/uvc_status.c new file mode 100644 index 000000000..7518ffce2 --- /dev/null +++ b/drivers/media/usb/uvc/uvc_status.c @@ -0,0 +1,313 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * uvc_status.c -- USB Video Class driver - Status endpoint + * + * Copyright (C) 2005-2009 + * Laurent Pinchart (laurent.pinchart@ideasonboard.com) + */ + +#include +#include +#include +#include +#include + +#include "uvcvideo.h" + +/* -------------------------------------------------------------------------- + * Input device + */ +#ifdef CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV +static int uvc_input_init(struct uvc_device *dev) +{ + struct input_dev *input; + int ret; + + input = input_allocate_device(); + if (input == NULL) + return -ENOMEM; + + usb_make_path(dev->udev, dev->input_phys, sizeof(dev->input_phys)); + strlcat(dev->input_phys, "/button", sizeof(dev->input_phys)); + + input->name = dev->name; + input->phys = dev->input_phys; + usb_to_input_id(dev->udev, &input->id); + input->dev.parent = &dev->intf->dev; + + __set_bit(EV_KEY, input->evbit); + __set_bit(KEY_CAMERA, input->keybit); + + if ((ret = input_register_device(input)) < 0) + goto error; + + dev->input = input; + return 0; + +error: + input_free_device(input); + return ret; +} + +static void uvc_input_unregister(struct uvc_device *dev) +{ + if (dev->input) + input_unregister_device(dev->input); +} + +static void uvc_input_report_key(struct uvc_device *dev, unsigned int code, + int value) +{ + if (dev->input) { + input_report_key(dev->input, code, value); + input_sync(dev->input); + } +} + +#else +#define uvc_input_init(dev) +#define uvc_input_unregister(dev) +#define uvc_input_report_key(dev, code, value) +#endif /* CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV */ + +/* -------------------------------------------------------------------------- + * Status interrupt endpoint + */ +struct uvc_streaming_status { + u8 bStatusType; + u8 bOriginator; + u8 bEvent; + u8 bValue[]; +} __packed; + +struct uvc_control_status { + u8 bStatusType; + u8 bOriginator; + u8 bEvent; + u8 bSelector; + u8 bAttribute; + u8 bValue[]; +} __packed; + +static void uvc_event_streaming(struct uvc_device *dev, + struct uvc_streaming_status *status, int len) +{ + if (len < 3) { + uvc_dbg(dev, STATUS, + "Invalid streaming status event received\n"); + return; + } + + if (status->bEvent == 0) { + if (len < 4) + return; + uvc_dbg(dev, STATUS, "Button (intf %u) %s len %d\n", + status->bOriginator, + status->bValue[0] ? "pressed" : "released", len); + uvc_input_report_key(dev, KEY_CAMERA, status->bValue[0]); + } else { + uvc_dbg(dev, STATUS, "Stream %u error event %02x len %d\n", + status->bOriginator, status->bEvent, len); + } +} + +#define UVC_CTRL_VALUE_CHANGE 0 +#define UVC_CTRL_INFO_CHANGE 1 +#define UVC_CTRL_FAILURE_CHANGE 2 +#define UVC_CTRL_MIN_CHANGE 3 +#define UVC_CTRL_MAX_CHANGE 4 + +static struct uvc_control *uvc_event_entity_find_ctrl(struct uvc_entity *entity, + u8 selector) +{ + struct uvc_control *ctrl; + unsigned int i; + + for (i = 0, ctrl = entity->controls; i < entity->ncontrols; i++, ctrl++) + if (ctrl->info.selector == selector) + return ctrl; + + return NULL; +} + +static struct uvc_control *uvc_event_find_ctrl(struct uvc_device *dev, + const struct uvc_control_status *status, + struct uvc_video_chain **chain) +{ + list_for_each_entry((*chain), &dev->chains, list) { + struct uvc_entity *entity; + struct uvc_control *ctrl; + + list_for_each_entry(entity, &(*chain)->entities, chain) { + if (entity->id != status->bOriginator) + continue; + + ctrl = uvc_event_entity_find_ctrl(entity, + status->bSelector); + if (ctrl) + return ctrl; + } + } + + return NULL; +} + +static bool uvc_event_control(struct urb *urb, + const struct uvc_control_status *status, int len) +{ + static const char *attrs[] = { "value", "info", "failure", "min", "max" }; + struct uvc_device *dev = urb->context; + struct uvc_video_chain *chain; + struct uvc_control *ctrl; + + if (len < 6 || status->bEvent != 0 || + status->bAttribute >= ARRAY_SIZE(attrs)) { + uvc_dbg(dev, STATUS, "Invalid control status event received\n"); + return false; + } + + uvc_dbg(dev, STATUS, "Control %u/%u %s change len %d\n", + status->bOriginator, status->bSelector, + attrs[status->bAttribute], len); + + /* Find the control. */ + ctrl = uvc_event_find_ctrl(dev, status, &chain); + if (!ctrl) + return false; + + switch (status->bAttribute) { + case UVC_CTRL_VALUE_CHANGE: + return uvc_ctrl_status_event_async(urb, chain, ctrl, + status->bValue); + + case UVC_CTRL_INFO_CHANGE: + case UVC_CTRL_FAILURE_CHANGE: + case UVC_CTRL_MIN_CHANGE: + case UVC_CTRL_MAX_CHANGE: + break; + } + + return false; +} + +static void uvc_status_complete(struct urb *urb) +{ + struct uvc_device *dev = urb->context; + int len, ret; + + switch (urb->status) { + case 0: + break; + + case -ENOENT: /* usb_kill_urb() called. */ + case -ECONNRESET: /* usb_unlink_urb() called. */ + case -ESHUTDOWN: /* The endpoint is being disabled. */ + case -EPROTO: /* Device is disconnected (reported by some host controllers). */ + return; + + default: + dev_warn(&dev->udev->dev, + "Non-zero status (%d) in status completion handler.\n", + urb->status); + return; + } + + len = urb->actual_length; + if (len > 0) { + switch (dev->status[0] & 0x0f) { + case UVC_STATUS_TYPE_CONTROL: { + struct uvc_control_status *status = + (struct uvc_control_status *)dev->status; + + if (uvc_event_control(urb, status, len)) + /* The URB will be resubmitted in work context. */ + return; + break; + } + + case UVC_STATUS_TYPE_STREAMING: { + struct uvc_streaming_status *status = + (struct uvc_streaming_status *)dev->status; + + uvc_event_streaming(dev, status, len); + break; + } + + default: + uvc_dbg(dev, STATUS, "Unknown status event type %u\n", + dev->status[0]); + break; + } + } + + /* Resubmit the URB. */ + urb->interval = dev->int_ep->desc.bInterval; + ret = usb_submit_urb(urb, GFP_ATOMIC); + if (ret < 0) + dev_err(&dev->udev->dev, + "Failed to resubmit status URB (%d).\n", ret); +} + +int uvc_status_init(struct uvc_device *dev) +{ + struct usb_host_endpoint *ep = dev->int_ep; + unsigned int pipe; + int interval; + + if (ep == NULL) + return 0; + + uvc_input_init(dev); + + dev->status = kzalloc(UVC_MAX_STATUS_SIZE, GFP_KERNEL); + if (dev->status == NULL) + return -ENOMEM; + + dev->int_urb = usb_alloc_urb(0, GFP_KERNEL); + if (dev->int_urb == NULL) { + kfree(dev->status); + return -ENOMEM; + } + + pipe = usb_rcvintpipe(dev->udev, ep->desc.bEndpointAddress); + + /* + * For high-speed interrupt endpoints, the bInterval value is used as + * an exponent of two. Some developers forgot about it. + */ + interval = ep->desc.bInterval; + if (interval > 16 && dev->udev->speed == USB_SPEED_HIGH && + (dev->quirks & UVC_QUIRK_STATUS_INTERVAL)) + interval = fls(interval) - 1; + + usb_fill_int_urb(dev->int_urb, dev->udev, pipe, + dev->status, UVC_MAX_STATUS_SIZE, uvc_status_complete, + dev, interval); + + return 0; +} + +void uvc_status_unregister(struct uvc_device *dev) +{ + usb_kill_urb(dev->int_urb); + uvc_input_unregister(dev); +} + +void uvc_status_cleanup(struct uvc_device *dev) +{ + usb_free_urb(dev->int_urb); + kfree(dev->status); +} + +int uvc_status_start(struct uvc_device *dev, gfp_t flags) +{ + if (dev->int_urb == NULL) + return 0; + + return usb_submit_urb(dev->int_urb, flags); +} + +void uvc_status_stop(struct uvc_device *dev) +{ + usb_kill_urb(dev->int_urb); +} -- cgit v1.2.3