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/input/sparse-keymap.c | 294 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 294 insertions(+) create mode 100644 drivers/input/sparse-keymap.c (limited to 'drivers/input/sparse-keymap.c') diff --git a/drivers/input/sparse-keymap.c b/drivers/input/sparse-keymap.c new file mode 100644 index 000000000..25bf8be6e --- /dev/null +++ b/drivers/input/sparse-keymap.c @@ -0,0 +1,294 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Generic support for sparse keymaps + * + * Copyright (c) 2009 Dmitry Torokhov + * + * Derived from wistron button driver: + * Copyright (C) 2005 Miloslav Trmac + * Copyright (C) 2005 Bernhard Rosenkraenzer + * Copyright (C) 2005 Dmitry Torokhov + */ + +#include +#include +#include +#include + +MODULE_AUTHOR("Dmitry Torokhov "); +MODULE_DESCRIPTION("Generic support for sparse keymaps"); +MODULE_LICENSE("GPL v2"); + +static unsigned int sparse_keymap_get_key_index(struct input_dev *dev, + const struct key_entry *k) +{ + struct key_entry *key; + unsigned int idx = 0; + + for (key = dev->keycode; key->type != KE_END; key++) { + if (key->type == KE_KEY) { + if (key == k) + break; + idx++; + } + } + + return idx; +} + +static struct key_entry *sparse_keymap_entry_by_index(struct input_dev *dev, + unsigned int index) +{ + struct key_entry *key; + unsigned int key_cnt = 0; + + for (key = dev->keycode; key->type != KE_END; key++) + if (key->type == KE_KEY) + if (key_cnt++ == index) + return key; + + return NULL; +} + +/** + * sparse_keymap_entry_from_scancode - perform sparse keymap lookup + * @dev: Input device using sparse keymap + * @code: Scan code + * + * This function is used to perform &struct key_entry lookup in an + * input device using sparse keymap. + */ +struct key_entry *sparse_keymap_entry_from_scancode(struct input_dev *dev, + unsigned int code) +{ + struct key_entry *key; + + for (key = dev->keycode; key->type != KE_END; key++) + if (code == key->code) + return key; + + return NULL; +} +EXPORT_SYMBOL(sparse_keymap_entry_from_scancode); + +/** + * sparse_keymap_entry_from_keycode - perform sparse keymap lookup + * @dev: Input device using sparse keymap + * @keycode: Key code + * + * This function is used to perform &struct key_entry lookup in an + * input device using sparse keymap. + */ +struct key_entry *sparse_keymap_entry_from_keycode(struct input_dev *dev, + unsigned int keycode) +{ + struct key_entry *key; + + for (key = dev->keycode; key->type != KE_END; key++) + if (key->type == KE_KEY && keycode == key->keycode) + return key; + + return NULL; +} +EXPORT_SYMBOL(sparse_keymap_entry_from_keycode); + +static struct key_entry *sparse_keymap_locate(struct input_dev *dev, + const struct input_keymap_entry *ke) +{ + struct key_entry *key; + unsigned int scancode; + + if (ke->flags & INPUT_KEYMAP_BY_INDEX) + key = sparse_keymap_entry_by_index(dev, ke->index); + else if (input_scancode_to_scalar(ke, &scancode) == 0) + key = sparse_keymap_entry_from_scancode(dev, scancode); + else + key = NULL; + + return key; +} + +static int sparse_keymap_getkeycode(struct input_dev *dev, + struct input_keymap_entry *ke) +{ + const struct key_entry *key; + + if (dev->keycode) { + key = sparse_keymap_locate(dev, ke); + if (key && key->type == KE_KEY) { + ke->keycode = key->keycode; + if (!(ke->flags & INPUT_KEYMAP_BY_INDEX)) + ke->index = + sparse_keymap_get_key_index(dev, key); + ke->len = sizeof(key->code); + memcpy(ke->scancode, &key->code, sizeof(key->code)); + return 0; + } + } + + return -EINVAL; +} + +static int sparse_keymap_setkeycode(struct input_dev *dev, + const struct input_keymap_entry *ke, + unsigned int *old_keycode) +{ + struct key_entry *key; + + if (dev->keycode) { + key = sparse_keymap_locate(dev, ke); + if (key && key->type == KE_KEY) { + *old_keycode = key->keycode; + key->keycode = ke->keycode; + set_bit(ke->keycode, dev->keybit); + if (!sparse_keymap_entry_from_keycode(dev, *old_keycode)) + clear_bit(*old_keycode, dev->keybit); + return 0; + } + } + + return -EINVAL; +} + +/** + * sparse_keymap_setup - set up sparse keymap for an input device + * @dev: Input device + * @keymap: Keymap in form of array of &key_entry structures ending + * with %KE_END type entry + * @setup: Function that can be used to adjust keymap entries + * depending on device's needs, may be %NULL + * + * The function calculates size and allocates copy of the original + * keymap after which sets up input device event bits appropriately. + * The allocated copy of the keymap is automatically freed when it + * is no longer needed. + */ +int sparse_keymap_setup(struct input_dev *dev, + const struct key_entry *keymap, + int (*setup)(struct input_dev *, struct key_entry *)) +{ + size_t map_size = 1; /* to account for the last KE_END entry */ + const struct key_entry *e; + struct key_entry *map, *entry; + int i; + int error; + + for (e = keymap; e->type != KE_END; e++) + map_size++; + + map = devm_kmemdup(&dev->dev, keymap, map_size * sizeof(*map), + GFP_KERNEL); + if (!map) + return -ENOMEM; + + for (i = 0; i < map_size; i++) { + entry = &map[i]; + + if (setup) { + error = setup(dev, entry); + if (error) + return error; + } + + switch (entry->type) { + case KE_KEY: + __set_bit(EV_KEY, dev->evbit); + __set_bit(entry->keycode, dev->keybit); + break; + + case KE_SW: + case KE_VSW: + __set_bit(EV_SW, dev->evbit); + __set_bit(entry->sw.code, dev->swbit); + break; + } + } + + if (test_bit(EV_KEY, dev->evbit)) { + __set_bit(KEY_UNKNOWN, dev->keybit); + __set_bit(EV_MSC, dev->evbit); + __set_bit(MSC_SCAN, dev->mscbit); + } + + dev->keycode = map; + dev->keycodemax = map_size; + dev->getkeycode = sparse_keymap_getkeycode; + dev->setkeycode = sparse_keymap_setkeycode; + + return 0; +} +EXPORT_SYMBOL(sparse_keymap_setup); + +/** + * sparse_keymap_report_entry - report event corresponding to given key entry + * @dev: Input device for which event should be reported + * @ke: key entry describing event + * @value: Value that should be reported (ignored by %KE_SW entries) + * @autorelease: Signals whether release event should be emitted for %KE_KEY + * entries right after reporting press event, ignored by all other + * entries + * + * This function is used to report input event described by given + * &struct key_entry. + */ +void sparse_keymap_report_entry(struct input_dev *dev, const struct key_entry *ke, + unsigned int value, bool autorelease) +{ + switch (ke->type) { + case KE_KEY: + input_event(dev, EV_MSC, MSC_SCAN, ke->code); + input_report_key(dev, ke->keycode, value); + input_sync(dev); + if (value && autorelease) { + input_report_key(dev, ke->keycode, 0); + input_sync(dev); + } + break; + + case KE_SW: + value = ke->sw.value; + fallthrough; + + case KE_VSW: + input_report_switch(dev, ke->sw.code, value); + input_sync(dev); + break; + } +} +EXPORT_SYMBOL(sparse_keymap_report_entry); + +/** + * sparse_keymap_report_event - report event corresponding to given scancode + * @dev: Input device using sparse keymap + * @code: Scan code + * @value: Value that should be reported (ignored by %KE_SW entries) + * @autorelease: Signals whether release event should be emitted for %KE_KEY + * entries right after reporting press event, ignored by all other + * entries + * + * This function is used to perform lookup in an input device using sparse + * keymap and report corresponding event. Returns %true if lookup was + * successful and %false otherwise. + */ +bool sparse_keymap_report_event(struct input_dev *dev, unsigned int code, + unsigned int value, bool autorelease) +{ + const struct key_entry *ke = + sparse_keymap_entry_from_scancode(dev, code); + struct key_entry unknown_ke; + + if (ke) { + sparse_keymap_report_entry(dev, ke, value, autorelease); + return true; + } + + /* Report an unknown key event as a debugging aid */ + unknown_ke.type = KE_KEY; + unknown_ke.code = code; + unknown_ke.keycode = KEY_UNKNOWN; + sparse_keymap_report_entry(dev, &unknown_ke, value, true); + + return false; +} +EXPORT_SYMBOL(sparse_keymap_report_event); + -- cgit v1.2.3