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/hid/surface-hid/surface_hid.c | 253 ++++++++++++++++++++++++++++++++++ 1 file changed, 253 insertions(+) create mode 100644 drivers/hid/surface-hid/surface_hid.c (limited to 'drivers/hid/surface-hid/surface_hid.c') diff --git a/drivers/hid/surface-hid/surface_hid.c b/drivers/hid/surface-hid/surface_hid.c new file mode 100644 index 000000000..61e5814b0 --- /dev/null +++ b/drivers/hid/surface-hid/surface_hid.c @@ -0,0 +1,253 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Surface System Aggregator Module (SSAM) HID transport driver for the + * generic HID interface (HID/TC=0x15 subsystem). Provides support for + * integrated HID devices on Surface Laptop 3, Book 3, and later. + * + * Copyright (C) 2019-2021 Blaž Hrastnik , + * Maximilian Luz + */ + +#include +#include +#include +#include +#include + +#include +#include + +#include "surface_hid_core.h" + + +/* -- SAM interface. -------------------------------------------------------- */ + +struct surface_hid_buffer_slice { + __u8 entry; + __le32 offset; + __le32 length; + __u8 end; + __u8 data[]; +} __packed; + +static_assert(sizeof(struct surface_hid_buffer_slice) == 10); + +enum surface_hid_cid { + SURFACE_HID_CID_OUTPUT_REPORT = 0x01, + SURFACE_HID_CID_GET_FEATURE_REPORT = 0x02, + SURFACE_HID_CID_SET_FEATURE_REPORT = 0x03, + SURFACE_HID_CID_GET_DESCRIPTOR = 0x04, +}; + +static int ssam_hid_get_descriptor(struct surface_hid_device *shid, u8 entry, u8 *buf, size_t len) +{ + u8 buffer[sizeof(struct surface_hid_buffer_slice) + 0x76]; + struct surface_hid_buffer_slice *slice; + struct ssam_request rqst; + struct ssam_response rsp; + u32 buffer_len, offset, length; + int status; + + /* + * Note: The 0x76 above has been chosen because that's what's used by + * the Windows driver. Together with the header, this leads to a 128 + * byte payload in total. + */ + + buffer_len = ARRAY_SIZE(buffer) - sizeof(struct surface_hid_buffer_slice); + + rqst.target_category = shid->uid.category; + rqst.target_id = shid->uid.target; + rqst.command_id = SURFACE_HID_CID_GET_DESCRIPTOR; + rqst.instance_id = shid->uid.instance; + rqst.flags = SSAM_REQUEST_HAS_RESPONSE; + rqst.length = sizeof(struct surface_hid_buffer_slice); + rqst.payload = buffer; + + rsp.capacity = ARRAY_SIZE(buffer); + rsp.pointer = buffer; + + slice = (struct surface_hid_buffer_slice *)buffer; + slice->entry = entry; + slice->end = 0; + + offset = 0; + length = buffer_len; + + while (!slice->end && offset < len) { + put_unaligned_le32(offset, &slice->offset); + put_unaligned_le32(length, &slice->length); + + rsp.length = 0; + + status = ssam_retry(ssam_request_do_sync_onstack, shid->ctrl, &rqst, &rsp, + sizeof(*slice)); + if (status) + return status; + + offset = get_unaligned_le32(&slice->offset); + length = get_unaligned_le32(&slice->length); + + /* Don't mess stuff up in case we receive garbage. */ + if (length > buffer_len || offset > len) + return -EPROTO; + + if (offset + length > len) + length = len - offset; + + memcpy(buf + offset, &slice->data[0], length); + + offset += length; + length = buffer_len; + } + + if (offset != len) { + dev_err(shid->dev, "unexpected descriptor length: got %u, expected %zu\n", + offset, len); + return -EPROTO; + } + + return 0; +} + +static int ssam_hid_set_raw_report(struct surface_hid_device *shid, u8 rprt_id, bool feature, + u8 *buf, size_t len) +{ + struct ssam_request rqst; + u8 cid; + + if (feature) + cid = SURFACE_HID_CID_SET_FEATURE_REPORT; + else + cid = SURFACE_HID_CID_OUTPUT_REPORT; + + rqst.target_category = shid->uid.category; + rqst.target_id = shid->uid.target; + rqst.instance_id = shid->uid.instance; + rqst.command_id = cid; + rqst.flags = 0; + rqst.length = len; + rqst.payload = buf; + + buf[0] = rprt_id; + + return ssam_retry(ssam_request_do_sync, shid->ctrl, &rqst, NULL); +} + +static int ssam_hid_get_raw_report(struct surface_hid_device *shid, u8 rprt_id, u8 *buf, size_t len) +{ + struct ssam_request rqst; + struct ssam_response rsp; + + rqst.target_category = shid->uid.category; + rqst.target_id = shid->uid.target; + rqst.instance_id = shid->uid.instance; + rqst.command_id = SURFACE_HID_CID_GET_FEATURE_REPORT; + rqst.flags = SSAM_REQUEST_HAS_RESPONSE; + rqst.length = sizeof(rprt_id); + rqst.payload = &rprt_id; + + rsp.capacity = len; + rsp.length = 0; + rsp.pointer = buf; + + return ssam_retry(ssam_request_do_sync_onstack, shid->ctrl, &rqst, &rsp, sizeof(rprt_id)); +} + +static u32 ssam_hid_event_fn(struct ssam_event_notifier *nf, const struct ssam_event *event) +{ + struct surface_hid_device *shid = container_of(nf, struct surface_hid_device, notif); + + if (event->command_id != 0x00) + return 0; + + hid_input_report(shid->hid, HID_INPUT_REPORT, (u8 *)&event->data[0], event->length, 0); + return SSAM_NOTIF_HANDLED; +} + + +/* -- Transport driver. ----------------------------------------------------- */ + +static int shid_output_report(struct surface_hid_device *shid, u8 rprt_id, u8 *buf, size_t len) +{ + int status; + + status = ssam_hid_set_raw_report(shid, rprt_id, false, buf, len); + return status >= 0 ? len : status; +} + +static int shid_get_feature_report(struct surface_hid_device *shid, u8 rprt_id, u8 *buf, size_t len) +{ + int status; + + status = ssam_hid_get_raw_report(shid, rprt_id, buf, len); + return status >= 0 ? len : status; +} + +static int shid_set_feature_report(struct surface_hid_device *shid, u8 rprt_id, u8 *buf, size_t len) +{ + int status; + + status = ssam_hid_set_raw_report(shid, rprt_id, true, buf, len); + return status >= 0 ? len : status; +} + + +/* -- Driver setup. --------------------------------------------------------- */ + +static int surface_hid_probe(struct ssam_device *sdev) +{ + struct surface_hid_device *shid; + + shid = devm_kzalloc(&sdev->dev, sizeof(*shid), GFP_KERNEL); + if (!shid) + return -ENOMEM; + + shid->dev = &sdev->dev; + shid->ctrl = sdev->ctrl; + shid->uid = sdev->uid; + + shid->notif.base.priority = 1; + shid->notif.base.fn = ssam_hid_event_fn; + shid->notif.event.reg = SSAM_EVENT_REGISTRY_REG(sdev->uid.target); + shid->notif.event.id.target_category = sdev->uid.category; + shid->notif.event.id.instance = sdev->uid.instance; + shid->notif.event.mask = SSAM_EVENT_MASK_STRICT; + shid->notif.event.flags = 0; + + shid->ops.get_descriptor = ssam_hid_get_descriptor; + shid->ops.output_report = shid_output_report; + shid->ops.get_feature_report = shid_get_feature_report; + shid->ops.set_feature_report = shid_set_feature_report; + + ssam_device_set_drvdata(sdev, shid); + return surface_hid_device_add(shid); +} + +static void surface_hid_remove(struct ssam_device *sdev) +{ + surface_hid_device_destroy(ssam_device_get_drvdata(sdev)); +} + +static const struct ssam_device_id surface_hid_match[] = { + { SSAM_SDEV(HID, ANY, SSAM_SSH_IID_ANY, 0x00) }, + { }, +}; +MODULE_DEVICE_TABLE(ssam, surface_hid_match); + +static struct ssam_device_driver surface_hid_driver = { + .probe = surface_hid_probe, + .remove = surface_hid_remove, + .match_table = surface_hid_match, + .driver = { + .name = "surface_hid", + .pm = &surface_hid_pm_ops, + .probe_type = PROBE_PREFER_ASYNCHRONOUS, + }, +}; +module_ssam_device_driver(surface_hid_driver); + +MODULE_AUTHOR("Blaž Hrastnik "); +MODULE_AUTHOR("Maximilian Luz "); +MODULE_DESCRIPTION("HID transport driver for Surface System Aggregator Module"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3