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, 265 insertions, 0 deletions

diff --git a/Documentation/input/ff.rst b/Documentation/input/ff.rst
new file mode 100644
index 000000000..5a1da42c3
--- /dev/null
+++ b/Documentation/input/ff.rst
@@ -0,0 +1,265 @@
+========================
+Force feedback for Linux
+========================
+
+:Author: Johann Deneux <johann.deneux@gmail.com> on 2001/04/22.
+:Updated: Anssi Hannula <anssi.hannula@gmail.com> on 2006/04/09.
+
+You may redistribute this file. Please remember to include shape.svg and
+interactive.svg as well.
+
+Introduction
+~~~~~~~~~~~~
+
+This document describes how to use force feedback devices under Linux. The
+goal is not to support these devices as if they were simple input-only devices
+(as it is already the case), but to really enable the rendering of force
+effects.
+This document only describes the force feedback part of the Linux input
+interface. Please read joydev/joystick.rst and input.rst before reading further
+this document.
+
+Instructions to the user
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+To enable force feedback, you have to:
+
+1. have your kernel configured with evdev and a driver that supports your
+   device.
+2. make sure evdev module is loaded and /dev/input/event* device files are
+   created.
+
+Before you start, let me WARN you that some devices shake violently during the
+initialisation phase. This happens for example with my "AVB Top Shot Pegasus".
+To stop this annoying behaviour, move your joystick to its limits. Anyway, you
+should keep a hand on your device, in order to avoid it to break down if
+something goes wrong.
+
+If you have a serial iforce device, you need to start inputattach. See
+joydev/joystick.rst for details.
+
+Does it work ?
+--------------
+
+There is an utility called fftest that will allow you to test the driver::
+
+    % fftest /dev/input/eventXX
+
+Instructions to the developer
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+All interactions are done using the event API. That is, you can use ioctl()
+and write() on /dev/input/eventXX.
+This information is subject to change.
+
+Querying device capabilities
+----------------------------
+
+::
+
+    #include <linux/input.h>
+    #include <sys/ioctl.h>
+
+    #define BITS_TO_LONGS(x) \
+	    (((x) + 8 * sizeof (unsigned long) - 1) / (8 * sizeof (unsigned long)))
+    unsigned long features[BITS_TO_LONGS(FF_CNT)];
+    int ioctl(int file_descriptor, int request, unsigned long *features);
+
+"request" must be EVIOCGBIT(EV_FF, size of features array in bytes )
+
+Returns the features supported by the device. features is a bitfield with the
+following bits:
+
+- FF_CONSTANT	can render constant force effects
+- FF_PERIODIC	can render periodic effects with the following waveforms:
+
+  - FF_SQUARE	  square waveform
+  - FF_TRIANGLE	  triangle waveform
+  - FF_SINE	  sine waveform
+  - FF_SAW_UP	  sawtooth up waveform
+  - FF_SAW_DOWN	  sawtooth down waveform
+  - FF_CUSTOM	  custom waveform
+
+- FF_RAMP       can render ramp effects
+- FF_SPRING	can simulate the presence of a spring
+- FF_FRICTION	can simulate friction
+- FF_DAMPER	can simulate damper effects
+- FF_RUMBLE	rumble effects
+- FF_INERTIA    can simulate inertia
+- FF_GAIN	gain is adjustable
+- FF_AUTOCENTER	autocenter is adjustable
+
+.. note::
+
+    - In most cases you should use FF_PERIODIC instead of FF_RUMBLE. All
+      devices that support FF_RUMBLE support FF_PERIODIC (square, triangle,
+      sine) and the other way around.
+
+    - The exact syntax FF_CUSTOM is undefined for the time being as no driver
+      supports it yet.
+
+::
+
+    int ioctl(int fd, EVIOCGEFFECTS, int *n);
+
+Returns the number of effects the device can keep in its memory.
+
+Uploading effects to the device
+-------------------------------
+
+::
+
+    #include <linux/input.h>
+    #include <sys/ioctl.h>
+
+    int ioctl(int file_descriptor, int request, struct ff_effect *effect);
+
+"request" must be EVIOCSFF.
+
+"effect" points to a structure describing the effect to upload. The effect is
+uploaded, but not played.
+The content of effect may be modified. In particular, its field "id" is set
+to the unique id assigned by the driver. This data is required for performing
+some operations (removing an effect, controlling the playback).
+The "id" field must be set to -1 by the user in order to tell the driver to
+allocate a new effect.
+
+Effects are file descriptor specific.
+
+See <uapi/linux/input.h> for a description of the ff_effect struct.  You
+should also find help in a few sketches, contained in files shape.svg
+and interactive.svg:
+
+.. kernel-figure:: shape.svg
+
+    Shape
+
+.. kernel-figure:: interactive.svg
+
+    Interactive
+
+
+Removing an effect from the device
+----------------------------------
+
+::
+
+    int ioctl(int fd, EVIOCRMFF, effect.id);
+
+This makes room for new effects in the device's memory. Note that this also
+stops the effect if it was playing.
+
+Controlling the playback of effects
+-----------------------------------
+
+Control of playing is done with write(). Below is an example:
+
+::
+
+    #include <linux/input.h>
+    #include <unistd.h>
+
+	struct input_event play;
+	struct input_event stop;
+	struct ff_effect effect;
+	int fd;
+   ...
+	fd = open("/dev/input/eventXX", O_RDWR);
+   ...
+	/* Play three times */
+	play.type = EV_FF;
+	play.code = effect.id;
+	play.value = 3;
+
+	write(fd, (const void*) &play, sizeof(play));
+   ...
+	/* Stop an effect */
+	stop.type = EV_FF;
+	stop.code = effect.id;
+	stop.value = 0;
+
+	write(fd, (const void*) &stop, sizeof(stop));
+
+Setting the gain
+----------------
+
+Not all devices have the same strength. Therefore, users should set a gain
+factor depending on how strong they want effects to be. This setting is
+persistent across access to the driver.
+
+::
+
+    /* Set the gain of the device
+    int gain;		/* between 0 and 100 */
+    struct input_event ie;	/* structure used to communicate with the driver */
+
+    ie.type = EV_FF;
+    ie.code = FF_GAIN;
+    ie.value = 0xFFFFUL * gain / 100;
+
+    if (write(fd, &ie, sizeof(ie)) == -1)
+	perror("set gain");
+
+Enabling/Disabling autocenter
+-----------------------------
+
+The autocenter feature quite disturbs the rendering of effects in my opinion,
+and I think it should be an effect, which computation depends on the game
+type. But you can enable it if you want.
+
+::
+
+    int autocenter;		/* between 0 and 100 */
+    struct input_event ie;
+
+    ie.type = EV_FF;
+    ie.code = FF_AUTOCENTER;
+    ie.value = 0xFFFFUL * autocenter / 100;
+
+    if (write(fd, &ie, sizeof(ie)) == -1)
+	perror("set auto-center");
+
+A value of 0 means "no auto-center".
+
+Dynamic update of an effect
+---------------------------
+
+Proceed as if you wanted to upload a new effect, except that instead of
+setting the id field to -1, you set it to the wanted effect id.
+Normally, the effect is not stopped and restarted. However, depending on the
+type of device, not all parameters can be dynamically updated. For example,
+the direction of an effect cannot be updated with iforce devices. In this
+case, the driver stops the effect, up-load it, and restart it.
+
+Therefore it is recommended to dynamically change direction while the effect
+is playing only when it is ok to restart the effect with a replay count of 1.
+
+Information about the status of effects
+---------------------------------------
+
+Every time the status of an effect is changed, an event is sent. The values
+and meanings of the fields of the event are as follows::
+
+    struct input_event {
+    /* When the status of the effect changed */
+	    struct timeval time;
+
+    /* Set to EV_FF_STATUS */
+	    unsigned short type;
+
+    /* Contains the id of the effect */
+	    unsigned short code;
+
+    /* Indicates the status */
+	    unsigned int value;
+    };
+
+    FF_STATUS_STOPPED	The effect stopped playing
+    FF_STATUS_PLAYING	The effect started to play
+
+.. note::
+
+    - Status feedback is only supported by iforce driver. If you have
+      a really good reason to use this, please contact
+      linux-joystick@atrey.karlin.mff.cuni.cz or anssi.hannula@gmail.com
+      so that support for it can be added to the rest of the drivers.