Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

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().
  ...

1 files changed, 322 insertions, 0 deletions

diff --git a/drivers/hid/hid-letsketch.c b/drivers/hid/hid-letsketch.c
new file mode 100644
index 000000000..74d17cf51
--- /dev/null
+++ b/drivers/hid/hid-letsketch.c
@@ -0,0 +1,322 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2021 Hans de Goede <hdegoede@redhat.com>
+ *
+ * Driver for the LetSketch / VSON WP9620N drawing tablet.
+ * This drawing tablet is also sold under other brand names such as Case U,
+ * presumably this driver will work for all of them. But it has only been
+ * tested with a LetSketch WP9620N model.
+ *
+ * These tablets also work without a special HID driver, but then only part
+ * of the active area works and both the pad and stylus buttons are hardwired
+ * to special key-combos. E.g. the 2 stylus buttons send right mouse clicks /
+ * resp. "e" key presses.
+ *
+ * This device has 4 USB interfaces:
+ *
+ * Interface 0 EP 0x81 bootclass mouse, rdesc len 18, report id 0x08,
+ *                                                    Application(ff00.0001)
+ *  This interface sends raw event input reports in a custom format, but only
+ *  after doing the special dance from letsketch_probe(). After enabling this
+ *  interface the other 3 interfaces are disabled.
+ *
+ * Interface 1 EP 0x82 bootclass mouse, rdesc len 83, report id 0x0a, Tablet
+ *  This interface sends absolute events for the pen, including pressure,
+ *  but only for some part of the active area due to special "aspect ratio"
+ *  correction and only half by default since it assumes it will be used
+ *  with a phone in portraid mode, while using the tablet in landscape mode.
+ *  Also stylus + pad button events are not reported here.
+ *
+ * Interface 2 EP 0x83 bootclass keybd, rdesc len 64, report id none, Std Kbd
+ *  This interfaces send various hard-coded key-combos for the pad buttons
+ *  and "e" keypresses for the 2nd stylus button
+ *
+ * Interface 3 EP 0x84 bootclass mouse, rdesc len 75, report id 0x01, Std Mouse
+ *  This reports right-click mouse-button events for the 1st stylus button
+ */
+#include <linux/device.h>
+#include <linux/input.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+#include <linux/timer.h>
+#include <linux/usb.h>
+
+#include <asm/unaligned.h>
+
+#include "hid-ids.h"
+
+#define LETSKETCH_RAW_IF		0
+
+#define LETSKETCH_RAW_DATA_LEN		12
+#define LETSKETCH_RAW_REPORT_ID		8
+
+#define LETSKETCH_PAD_BUTTONS		5
+
+#define LETSKETCH_INFO_STR_IDX_BEGIN	0xc8
+#define LETSKETCH_INFO_STR_IDX_END	0xca
+
+#define LETSKETCH_GET_STRING_RETRIES	5
+
+struct letsketch_data {
+	struct hid_device *hdev;
+	struct input_dev *input_tablet;
+	struct input_dev *input_tablet_pad;
+	struct timer_list inrange_timer;
+};
+
+static int letsketch_open(struct input_dev *dev)
+{
+	struct letsketch_data *data = input_get_drvdata(dev);
+
+	return hid_hw_open(data->hdev);
+}
+
+static void letsketch_close(struct input_dev *dev)
+{
+	struct letsketch_data *data = input_get_drvdata(dev);
+
+	hid_hw_close(data->hdev);
+}
+
+static struct input_dev *letsketch_alloc_input_dev(struct letsketch_data *data)
+{
+	struct input_dev *input;
+
+	input = devm_input_allocate_device(&data->hdev->dev);
+	if (!input)
+		return NULL;
+
+	input->id.bustype = data->hdev->bus;
+	input->id.vendor  = data->hdev->vendor;
+	input->id.product = data->hdev->product;
+	input->id.version = data->hdev->bus;
+	input->phys = data->hdev->phys;
+	input->uniq = data->hdev->uniq;
+	input->open = letsketch_open;
+	input->close = letsketch_close;
+
+	input_set_drvdata(input, data);
+
+	return input;
+}
+
+static int letsketch_setup_input_tablet(struct letsketch_data *data)
+{
+	struct input_dev *input;
+
+	input = letsketch_alloc_input_dev(data);
+	if (!input)
+		return -ENOMEM;
+
+	input_set_abs_params(input, ABS_X, 0, 50800, 0, 0);
+	input_set_abs_params(input, ABS_Y, 0, 31750, 0, 0);
+	input_set_abs_params(input, ABS_PRESSURE, 0, 8192, 0, 0);
+	input_abs_set_res(input, ABS_X, 240);
+	input_abs_set_res(input, ABS_Y, 225);
+	input_set_capability(input, EV_KEY, BTN_TOUCH);
+	input_set_capability(input, EV_KEY, BTN_TOOL_PEN);
+	input_set_capability(input, EV_KEY, BTN_STYLUS);
+	input_set_capability(input, EV_KEY, BTN_STYLUS2);
+
+	/* All known brands selling this tablet use WP9620[N] as model name */
+	input->name = "WP9620 Tablet";
+
+	data->input_tablet = input;
+
+	return input_register_device(data->input_tablet);
+}
+
+static int letsketch_setup_input_tablet_pad(struct letsketch_data *data)
+{
+	struct input_dev *input;
+	int i;
+
+	input = letsketch_alloc_input_dev(data);
+	if (!input)
+		return -ENOMEM;
+
+	for (i = 0; i < LETSKETCH_PAD_BUTTONS; i++)
+		input_set_capability(input, EV_KEY, BTN_0 + i);
+
+	/*
+	 * These are never send on the pad input_dev, but must be set
+	 * on the Pad to make udev / libwacom happy.
+	 */
+	input_set_abs_params(input, ABS_X, 0, 1, 0, 0);
+	input_set_abs_params(input, ABS_Y, 0, 1, 0, 0);
+	input_set_capability(input, EV_KEY, BTN_STYLUS);
+
+	input->name = "WP9620 Pad";
+
+	data->input_tablet_pad = input;
+
+	return input_register_device(data->input_tablet_pad);
+}
+
+static void letsketch_inrange_timeout(struct timer_list *t)
+{
+	struct letsketch_data *data = from_timer(data, t, inrange_timer);
+	struct input_dev *input = data->input_tablet;
+
+	input_report_key(input, BTN_TOOL_PEN, 0);
+	input_sync(input);
+}
+
+static int letsketch_raw_event(struct hid_device *hdev,
+			       struct hid_report *report,
+			       u8 *raw_data, int size)
+{
+	struct letsketch_data *data = hid_get_drvdata(hdev);
+	struct input_dev *input;
+	int i;
+
+	if (size != LETSKETCH_RAW_DATA_LEN || raw_data[0] != LETSKETCH_RAW_REPORT_ID)
+		return 0;
+
+	switch (raw_data[1] & 0xf0) {
+	case 0x80: /* Pen data */
+		input = data->input_tablet;
+		input_report_key(input, BTN_TOOL_PEN, 1);
+		input_report_key(input, BTN_TOUCH, raw_data[1] & 0x01);
+		input_report_key(input, BTN_STYLUS, raw_data[1] & 0x02);
+		input_report_key(input, BTN_STYLUS2, raw_data[1] & 0x04);
+		input_report_abs(input, ABS_X,
+				 get_unaligned_le16(raw_data + 2));
+		input_report_abs(input, ABS_Y,
+				 get_unaligned_le16(raw_data + 4));
+		input_report_abs(input, ABS_PRESSURE,
+				 get_unaligned_le16(raw_data + 6));
+		/*
+		 * There is no out of range event, so use a timer for this
+		 * when in range we get an event approx. every 8 ms.
+		 */
+		mod_timer(&data->inrange_timer, jiffies + msecs_to_jiffies(100));
+		break;
+	case 0xe0: /* Pad data */
+		input = data->input_tablet_pad;
+		for (i = 0; i < LETSKETCH_PAD_BUTTONS; i++)
+			input_report_key(input, BTN_0 + i, raw_data[4] == (i + 1));
+		break;
+	default:
+		hid_warn(data->hdev, "Warning unknown data header: 0x%02x\n",
+			 raw_data[0]);
+		return 0;
+	}
+
+	input_sync(input);
+	return 0;
+}
+
+/*
+ * The tablets magic handshake to put it in raw mode relies on getting
+ * string descriptors. But the firmware is buggy and does not like it if
+ * we do this too fast. Even if we go slow sometimes the usb_string() call
+ * fails. Ignore errors and retry it a couple of times if necessary.
+ */
+static int letsketch_get_string(struct usb_device *udev, int index, char *buf, int size)
+{
+	int i, ret;
+
+	for (i = 0; i < LETSKETCH_GET_STRING_RETRIES; i++) {
+		usleep_range(5000, 7000);
+		ret = usb_string(udev, index, buf, size);
+		if (ret > 0)
+			return 0;
+	}
+
+	dev_err(&udev->dev, "Max retries (%d) exceeded reading string descriptor %d\n",
+		LETSKETCH_GET_STRING_RETRIES, index);
+	return ret ? ret : -EIO;
+}
+
+static int letsketch_probe(struct hid_device *hdev, const struct hid_device_id *id)
+{
+	struct device *dev = &hdev->dev;
+	struct letsketch_data *data;
+	struct usb_interface *intf;
+	struct usb_device *udev;
+	char buf[256];
+	int i, ret;
+
+	if (!hid_is_using_ll_driver(hdev, &usb_hid_driver))
+		return -ENODEV;
+
+	intf = to_usb_interface(hdev->dev.parent);
+	if (intf->altsetting->desc.bInterfaceNumber != LETSKETCH_RAW_IF)
+		return -ENODEV; /* Ignore the other interfaces */
+
+	udev = interface_to_usbdev(intf);
+
+	/*
+	 * Instead of using a set-feature request, or even a custom USB ctrl
+	 * message the tablet needs this elaborate magic reading of USB
+	 * string descriptors to kick it into raw mode. This is what the
+	 * Windows drivers are seen doing in an USB trace under Windows.
+	 */
+	for (i = LETSKETCH_INFO_STR_IDX_BEGIN; i <= LETSKETCH_INFO_STR_IDX_END; i++) {
+		ret = letsketch_get_string(udev, i, buf, sizeof(buf));
+		if (ret)
+			return ret;
+
+		hid_info(hdev, "Device info: %s\n", buf);
+	}
+
+	for (i = 1; i <= 250; i++) {
+		ret = letsketch_get_string(udev, i, buf, sizeof(buf));
+		if (ret)
+			return ret;
+	}
+
+	ret = letsketch_get_string(udev, 0x64, buf, sizeof(buf));
+	if (ret)
+		return ret;
+
+	ret = letsketch_get_string(udev, LETSKETCH_INFO_STR_IDX_BEGIN, buf, sizeof(buf));
+	if (ret)
+		return ret;
+
+	/*
+	 * The tablet should be in raw mode now, end with a final delay before
+	 * doing further IO to the device.
+	 */
+	usleep_range(5000, 7000);
+
+	ret = hid_parse(hdev);
+	if (ret)
+		return ret;
+
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	data->hdev = hdev;
+	timer_setup(&data->inrange_timer, letsketch_inrange_timeout, 0);
+	hid_set_drvdata(hdev, data);
+
+	ret = letsketch_setup_input_tablet(data);
+	if (ret)
+		return ret;
+
+	ret = letsketch_setup_input_tablet_pad(data);
+	if (ret)
+		return ret;
+
+	return hid_hw_start(hdev, HID_CONNECT_HIDRAW);
+}
+
+static const struct hid_device_id letsketch_devices[] = {
+	{ HID_USB_DEVICE(USB_VENDOR_ID_LETSKETCH, USB_DEVICE_ID_WP9620N) },
+	{ }
+};
+MODULE_DEVICE_TABLE(hid, letsketch_devices);
+
+static struct hid_driver letsketch_driver = {
+	.name = "letsketch",
+	.id_table = letsketch_devices,
+	.probe = letsketch_probe,
+	.raw_event = letsketch_raw_event,
+};
+module_hid_driver(letsketch_driver);
+
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
+MODULE_LICENSE("GPL");