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, 168 insertions, 0 deletions

diff --git a/Documentation/translations/zh_CN/userspace-api/accelerators/ocxl.rst b/Documentation/translations/zh_CN/userspace-api/accelerators/ocxl.rst
new file mode 100644
index 000000000..845b932bf
--- /dev/null
+++ b/Documentation/translations/zh_CN/userspace-api/accelerators/ocxl.rst
@@ -0,0 +1,168 @@
+.. SPDX-License-Identifier: GPL-2.0
+.. include:: ../../disclaimer-zh_CN.rst
+
+:Original: Documentation/userspace-api/accelerators/ocxl.rst
+
+:翻译:
+
+ 李睿 Rui Li <me@lirui.org>
+
+=====================================
+OpenCAPI （开放相干加速器处理器接口）
+=====================================
+
+*OpenCAPI: Open Coherent Accelerator Processor Interface*
+
+OpenCAPI是处理器和加速器之间的一个接口，致力于达到低延迟和高带宽。该规范
+由 `OpenCAPI Consortium <http://opencapi.org/>`_ 开发。
+
+它允许加速器（可以是FPGA、ASIC等）使用虚拟地址连贯地访问主机内存。一个OpenCAPI
+设备也可以托管它自己的内存，并可以由主机访问。
+
+OpenCAPI在Linux中称为“ocxl”，它作为“cxl”（用于powerpc的IBM CAPI接口的驱动）的
+开放、处理器无关的演进，这么命名是为了避免与ISDN CAPI子系统相混淆。
+
+
+高层视角
+========
+
+OpenCAPI定义了一个在物理链路层上实现的数据链路层（TL）和传输层（TL）。任何
+实现DL和TL的处理器或者设备都可以开始共享内存。
+
+::
+
+  +-----------+                         +-------------+
+  |           |                         |             |
+  |           |                         | Accelerated |
+  | Processor |                         |  Function   |
+  |           |  +--------+             |    Unit     |  +--------+
+  |           |--| Memory |             |    (AFU)    |--| Memory |
+  |           |  +--------+             |             |  +--------+
+  +-----------+                         +-------------+
+       |                                       |
+  +-----------+                         +-------------+
+  |    TL     |                         |    TLX      |
+  +-----------+                         +-------------+
+       |                                       |
+  +-----------+                         +-------------+
+  |    DL     |                         |    DLX      |
+  +-----------+                         +-------------+
+       |                                       |
+       |                   PHY                 |
+       +---------------------------------------+
+
+  Processor：处理器
+  Memory：内存
+  Accelerated Function Unit：加速函数单元
+
+
+
+设备发现
+========
+
+OpenCAPI依赖一个在设备上实现的与PCI类似的配置空间。因此主机可以通过查询
+配置空间来发现AFU。
+
+OpenCAPI设备在Linux中被当作类PCI设备（有一些注意事项）。固件需要对硬件进行
+抽象，就好像它是一个PCI链路。许多已有的PCI架构被重用：在模拟标准PCI时，
+设备被扫描并且BAR（基址寄存器）被分配。像“lspci”的命令因此可以被用于查看
+哪些设备可用。
+
+配置空间定义了可以在物理适配器上可以被找到的AFU，比如它的名字、支持多少内
+存上下文、内存映射IO（MMIO）区域的大小等。
+
+
+
+MMIO
+====
+
+OpenCAPI为每个AFU定义了两个MMIO区域：
+
+* 全局MMIO区域，保存和整个AFU相关的寄存器。
+* 每个进程的MMIO区域，对于每个上下文固定大小。
+
+
+
+AFU中断
+=======
+
+OpenCAPI拥有AFU向主机进程发送中断的可能性。它通过定义在传输层的“intrp_req”
+来完成，指定一个定义中断的64位对象句柄。
+
+驱动允许一个进程分配中断并获取可以传递给AFU的64位对象句柄。
+
+
+
+字符设备
+========
+
+驱动为每个在物理设备上发现的AFU创建一个字符设备。一个物理设备可能拥有多个
+函数，一个函数可以拥有多个AFU。不过编写这篇文档之时，只对导出一个AFU的设备
+测试过。
+
+字符设备可以在 /dev/ocxl/ 中被找到，其命名为：
+/dev/ocxl/<AFU 名称>.<位置>.<索引>
+
+<AFU 名称> 是一个最长20个字符的名称，和在AFU配置空间中找到的相同。
+<位置>由驱动添加，可在系统有不止一个相同的OpenCAPI设备时帮助区分设备。
+<索引>也是为了在少见情况下帮助区分AFU，即设备携带多个同样的AFU副本时。
+
+
+
+Sysfs类
+=======
+
+添加了代表AFU的ocxl类。查看/sys/class/ocxl。布局在
+Documentation/ABI/testing/sysfs-class-ocxl 中描述。
+
+
+
+用户API
+=======
+
+打开
+----
+
+基于在配置空间中找到的AFU定义，AFU可能支持在多个内存上下文中工作，这种情况
+下相关的字符设备可以被不同进程多次打开。
+
+
+ioctl
+-----
+
+OCXL_IOCTL_ATTACH:
+
+  附加调用进程的内存上下文到AFU，以允许AFU访问其内存。
+
+OCXL_IOCTL_IRQ_ALLOC:
+
+  分配AFU中断，返回标识符。
+
+OCXL_IOCTL_IRQ_FREE:
+
+  释放之前分配的AFU中断。
+
+OCXL_IOCTL_IRQ_SET_FD:
+
+  将一个事件文件描述符和AFU中断关联，因此用户进程可以在AFU发送中断时收到通
+  知。
+
+OCXL_IOCTL_GET_METADATA:
+
+  从卡中获取配置信息，比如内存映射IO区域的大小、AFU版本和当前上下文的进程
+  地址空间ID（PASID）。
+
+OCXL_IOCTL_ENABLE_P9_WAIT:
+
+  允许AFU唤醒执行“等待”的用户空间进程。返回信息给用户空间，允许其配置AFU。
+  注意这只在POWER9上可用。
+
+OCXL_IOCTL_GET_FEATURES:
+
+  报告用户空间可用的影响OpenCAPI的CPU特性。
+
+
+mmap
+----
+
+一个进程可以mmap每个进程的MMIO区域来和AFU交互。