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/staging/greybus/hid.c | 519 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 519 insertions(+) create mode 100644 drivers/staging/greybus/hid.c (limited to 'drivers/staging/greybus/hid.c') diff --git a/drivers/staging/greybus/hid.c b/drivers/staging/greybus/hid.c new file mode 100644 index 000000000..adb912868 --- /dev/null +++ b/drivers/staging/greybus/hid.c @@ -0,0 +1,519 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * HID class driver for the Greybus. + * + * Copyright 2014 Google Inc. + * Copyright 2014 Linaro Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include + +/* Greybus HID device's structure */ +struct gb_hid { + struct gb_bundle *bundle; + struct gb_connection *connection; + + struct hid_device *hid; + struct gb_hid_desc_response hdesc; + + unsigned long flags; +#define GB_HID_STARTED 0x01 +#define GB_HID_READ_PENDING 0x04 + + unsigned int bufsize; + char *inbuf; +}; + +/* Routines to get controller's information over greybus */ + +/* Operations performed on greybus */ +static int gb_hid_get_desc(struct gb_hid *ghid) +{ + return gb_operation_sync(ghid->connection, GB_HID_TYPE_GET_DESC, NULL, + 0, &ghid->hdesc, sizeof(ghid->hdesc)); +} + +static int gb_hid_get_report_desc(struct gb_hid *ghid, char *rdesc) +{ + int ret; + + ret = gb_pm_runtime_get_sync(ghid->bundle); + if (ret) + return ret; + + ret = gb_operation_sync(ghid->connection, GB_HID_TYPE_GET_REPORT_DESC, + NULL, 0, rdesc, + le16_to_cpu(ghid->hdesc.wReportDescLength)); + + gb_pm_runtime_put_autosuspend(ghid->bundle); + + return ret; +} + +static int gb_hid_set_power(struct gb_hid *ghid, int type) +{ + int ret; + + ret = gb_pm_runtime_get_sync(ghid->bundle); + if (ret) + return ret; + + ret = gb_operation_sync(ghid->connection, type, NULL, 0, NULL, 0); + + gb_pm_runtime_put_autosuspend(ghid->bundle); + + return ret; +} + +static int gb_hid_get_report(struct gb_hid *ghid, u8 report_type, u8 report_id, + unsigned char *buf, int len) +{ + struct gb_hid_get_report_request request; + int ret; + + ret = gb_pm_runtime_get_sync(ghid->bundle); + if (ret) + return ret; + + request.report_type = report_type; + request.report_id = report_id; + + ret = gb_operation_sync(ghid->connection, GB_HID_TYPE_GET_REPORT, + &request, sizeof(request), buf, len); + + gb_pm_runtime_put_autosuspend(ghid->bundle); + + return ret; +} + +static int gb_hid_set_report(struct gb_hid *ghid, u8 report_type, u8 report_id, + unsigned char *buf, int len) +{ + struct gb_hid_set_report_request *request; + struct gb_operation *operation; + int ret, size = sizeof(*request) + len - 1; + + ret = gb_pm_runtime_get_sync(ghid->bundle); + if (ret) + return ret; + + operation = gb_operation_create(ghid->connection, + GB_HID_TYPE_SET_REPORT, size, 0, + GFP_KERNEL); + if (!operation) { + gb_pm_runtime_put_autosuspend(ghid->bundle); + return -ENOMEM; + } + + request = operation->request->payload; + request->report_type = report_type; + request->report_id = report_id; + memcpy(request->report, buf, len); + + ret = gb_operation_request_send_sync(operation); + if (ret) { + dev_err(&operation->connection->bundle->dev, + "failed to set report: %d\n", ret); + } else { + ret = len; + } + + gb_operation_put(operation); + gb_pm_runtime_put_autosuspend(ghid->bundle); + + return ret; +} + +static int gb_hid_request_handler(struct gb_operation *op) +{ + struct gb_connection *connection = op->connection; + struct gb_hid *ghid = gb_connection_get_data(connection); + struct gb_hid_input_report_request *request = op->request->payload; + + if (op->type != GB_HID_TYPE_IRQ_EVENT) { + dev_err(&connection->bundle->dev, + "unsupported unsolicited request\n"); + return -EINVAL; + } + + if (test_bit(GB_HID_STARTED, &ghid->flags)) + hid_input_report(ghid->hid, HID_INPUT_REPORT, + request->report, op->request->payload_size, 1); + + return 0; +} + +static int gb_hid_report_len(struct hid_report *report) +{ + return ((report->size - 1) >> 3) + 1 + + report->device->report_enum[report->type].numbered; +} + +static void gb_hid_find_max_report(struct hid_device *hid, unsigned int type, + unsigned int *max) +{ + struct hid_report *report; + unsigned int size; + + list_for_each_entry(report, &hid->report_enum[type].report_list, list) { + size = gb_hid_report_len(report); + if (*max < size) + *max = size; + } +} + +static void gb_hid_free_buffers(struct gb_hid *ghid) +{ + kfree(ghid->inbuf); + ghid->inbuf = NULL; + ghid->bufsize = 0; +} + +static int gb_hid_alloc_buffers(struct gb_hid *ghid, size_t bufsize) +{ + ghid->inbuf = kzalloc(bufsize, GFP_KERNEL); + if (!ghid->inbuf) + return -ENOMEM; + + ghid->bufsize = bufsize; + + return 0; +} + +/* Routines dealing with reports */ +static void gb_hid_init_report(struct gb_hid *ghid, struct hid_report *report) +{ + unsigned int size; + + size = gb_hid_report_len(report); + if (gb_hid_get_report(ghid, report->type, report->id, ghid->inbuf, + size)) + return; + + /* + * hid->driver_lock is held as we are in probe function, + * we just need to setup the input fields, so using + * hid_report_raw_event is safe. + */ + hid_report_raw_event(ghid->hid, report->type, ghid->inbuf, size, 1); +} + +static void gb_hid_init_reports(struct gb_hid *ghid) +{ + struct hid_device *hid = ghid->hid; + struct hid_report *report; + + list_for_each_entry(report, + &hid->report_enum[HID_INPUT_REPORT].report_list, + list) + gb_hid_init_report(ghid, report); + + list_for_each_entry(report, + &hid->report_enum[HID_FEATURE_REPORT].report_list, + list) + gb_hid_init_report(ghid, report); +} + +static int __gb_hid_get_raw_report(struct hid_device *hid, + unsigned char report_number, __u8 *buf, size_t count, + unsigned char report_type) +{ + struct gb_hid *ghid = hid->driver_data; + int ret; + + if (report_type == HID_OUTPUT_REPORT) + return -EINVAL; + + ret = gb_hid_get_report(ghid, report_type, report_number, buf, count); + if (!ret) + ret = count; + + return ret; +} + +static int __gb_hid_output_raw_report(struct hid_device *hid, __u8 *buf, + size_t len, unsigned char report_type) +{ + struct gb_hid *ghid = hid->driver_data; + int report_id = buf[0]; + int ret; + + if (report_type == HID_INPUT_REPORT) + return -EINVAL; + + if (report_id) { + buf++; + len--; + } + + ret = gb_hid_set_report(ghid, report_type, report_id, buf, len); + if (report_id && ret >= 0) + ret++; /* add report_id to the number of transferred bytes */ + + return 0; +} + +static int gb_hid_raw_request(struct hid_device *hid, unsigned char reportnum, + __u8 *buf, size_t len, unsigned char rtype, + int reqtype) +{ + switch (reqtype) { + case HID_REQ_GET_REPORT: + return __gb_hid_get_raw_report(hid, reportnum, buf, len, rtype); + case HID_REQ_SET_REPORT: + if (buf[0] != reportnum) + return -EINVAL; + return __gb_hid_output_raw_report(hid, buf, len, rtype); + default: + return -EIO; + } +} + +/* HID Callbacks */ +static int gb_hid_parse(struct hid_device *hid) +{ + struct gb_hid *ghid = hid->driver_data; + unsigned int rsize; + char *rdesc; + int ret; + + rsize = le16_to_cpu(ghid->hdesc.wReportDescLength); + if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) { + dbg_hid("weird size of report descriptor (%u)\n", rsize); + return -EINVAL; + } + + rdesc = kzalloc(rsize, GFP_KERNEL); + if (!rdesc) + return -ENOMEM; + + ret = gb_hid_get_report_desc(ghid, rdesc); + if (ret) { + hid_err(hid, "reading report descriptor failed\n"); + goto free_rdesc; + } + + ret = hid_parse_report(hid, rdesc, rsize); + if (ret) + dbg_hid("parsing report descriptor failed\n"); + +free_rdesc: + kfree(rdesc); + + return ret; +} + +static int gb_hid_start(struct hid_device *hid) +{ + struct gb_hid *ghid = hid->driver_data; + unsigned int bufsize = HID_MIN_BUFFER_SIZE; + int ret; + + gb_hid_find_max_report(hid, HID_INPUT_REPORT, &bufsize); + gb_hid_find_max_report(hid, HID_OUTPUT_REPORT, &bufsize); + gb_hid_find_max_report(hid, HID_FEATURE_REPORT, &bufsize); + + if (bufsize > HID_MAX_BUFFER_SIZE) + bufsize = HID_MAX_BUFFER_SIZE; + + ret = gb_hid_alloc_buffers(ghid, bufsize); + if (ret) + return ret; + + if (!(hid->quirks & HID_QUIRK_NO_INIT_REPORTS)) + gb_hid_init_reports(ghid); + + return 0; +} + +static void gb_hid_stop(struct hid_device *hid) +{ + struct gb_hid *ghid = hid->driver_data; + + gb_hid_free_buffers(ghid); +} + +static int gb_hid_open(struct hid_device *hid) +{ + struct gb_hid *ghid = hid->driver_data; + int ret; + + ret = gb_hid_set_power(ghid, GB_HID_TYPE_PWR_ON); + if (ret < 0) + return ret; + + set_bit(GB_HID_STARTED, &ghid->flags); + return 0; +} + +static void gb_hid_close(struct hid_device *hid) +{ + struct gb_hid *ghid = hid->driver_data; + int ret; + + clear_bit(GB_HID_STARTED, &ghid->flags); + + /* Save some power */ + ret = gb_hid_set_power(ghid, GB_HID_TYPE_PWR_OFF); + if (ret) + dev_err(&ghid->connection->bundle->dev, + "failed to power off (%d)\n", ret); +} + +static int gb_hid_power(struct hid_device *hid, int lvl) +{ + struct gb_hid *ghid = hid->driver_data; + + switch (lvl) { + case PM_HINT_FULLON: + return gb_hid_set_power(ghid, GB_HID_TYPE_PWR_ON); + case PM_HINT_NORMAL: + return gb_hid_set_power(ghid, GB_HID_TYPE_PWR_OFF); + } + + return 0; +} + +/* HID structure to pass callbacks */ +static struct hid_ll_driver gb_hid_ll_driver = { + .parse = gb_hid_parse, + .start = gb_hid_start, + .stop = gb_hid_stop, + .open = gb_hid_open, + .close = gb_hid_close, + .power = gb_hid_power, + .raw_request = gb_hid_raw_request, +}; + +static int gb_hid_init(struct gb_hid *ghid) +{ + struct hid_device *hid = ghid->hid; + int ret; + + ret = gb_hid_get_desc(ghid); + if (ret) + return ret; + + hid->version = le16_to_cpu(ghid->hdesc.bcdHID); + hid->vendor = le16_to_cpu(ghid->hdesc.wVendorID); + hid->product = le16_to_cpu(ghid->hdesc.wProductID); + hid->country = ghid->hdesc.bCountryCode; + + hid->driver_data = ghid; + hid->ll_driver = &gb_hid_ll_driver; + hid->dev.parent = &ghid->connection->bundle->dev; +// hid->bus = BUS_GREYBUS; /* Need a bustype for GREYBUS in */ + + /* Set HID device's name */ + snprintf(hid->name, sizeof(hid->name), "%s %04X:%04X", + dev_name(&ghid->connection->bundle->dev), + hid->vendor, hid->product); + + return 0; +} + +static int gb_hid_probe(struct gb_bundle *bundle, + const struct greybus_bundle_id *id) +{ + struct greybus_descriptor_cport *cport_desc; + struct gb_connection *connection; + struct hid_device *hid; + struct gb_hid *ghid; + int ret; + + if (bundle->num_cports != 1) + return -ENODEV; + + cport_desc = &bundle->cport_desc[0]; + if (cport_desc->protocol_id != GREYBUS_PROTOCOL_HID) + return -ENODEV; + + ghid = kzalloc(sizeof(*ghid), GFP_KERNEL); + if (!ghid) + return -ENOMEM; + + connection = gb_connection_create(bundle, le16_to_cpu(cport_desc->id), + gb_hid_request_handler); + if (IS_ERR(connection)) { + ret = PTR_ERR(connection); + goto err_free_ghid; + } + + gb_connection_set_data(connection, ghid); + ghid->connection = connection; + + hid = hid_allocate_device(); + if (IS_ERR(hid)) { + ret = PTR_ERR(hid); + goto err_connection_destroy; + } + + ghid->hid = hid; + ghid->bundle = bundle; + + greybus_set_drvdata(bundle, ghid); + + ret = gb_connection_enable(connection); + if (ret) + goto err_destroy_hid; + + ret = gb_hid_init(ghid); + if (ret) + goto err_connection_disable; + + ret = hid_add_device(hid); + if (ret) { + hid_err(hid, "can't add hid device: %d\n", ret); + goto err_connection_disable; + } + + gb_pm_runtime_put_autosuspend(bundle); + + return 0; + +err_connection_disable: + gb_connection_disable(connection); +err_destroy_hid: + hid_destroy_device(hid); +err_connection_destroy: + gb_connection_destroy(connection); +err_free_ghid: + kfree(ghid); + + return ret; +} + +static void gb_hid_disconnect(struct gb_bundle *bundle) +{ + struct gb_hid *ghid = greybus_get_drvdata(bundle); + + if (gb_pm_runtime_get_sync(bundle)) + gb_pm_runtime_get_noresume(bundle); + + hid_destroy_device(ghid->hid); + gb_connection_disable(ghid->connection); + gb_connection_destroy(ghid->connection); + kfree(ghid); +} + +static const struct greybus_bundle_id gb_hid_id_table[] = { + { GREYBUS_DEVICE_CLASS(GREYBUS_CLASS_HID) }, + { } +}; +MODULE_DEVICE_TABLE(greybus, gb_hid_id_table); + +static struct greybus_driver gb_hid_driver = { + .name = "hid", + .probe = gb_hid_probe, + .disconnect = gb_hid_disconnect, + .id_table = gb_hid_id_table, +}; +module_greybus_driver(gb_hid_driver); + +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3