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, 192 insertions, 0 deletions

diff --git a/Documentation/translations/zh_CN/PCI/pciebus-howto.rst b/Documentation/translations/zh_CN/PCI/pciebus-howto.rst
new file mode 100644
index 000000000..65c4301f1
--- /dev/null
+++ b/Documentation/translations/zh_CN/PCI/pciebus-howto.rst
@@ -0,0 +1,192 @@
+.. SPDX-License-Identifier: GPL-2.0
+.. include:: <isonum.txt>
+.. include:: ../disclaimer-zh_CN.rst
+
+:Original: Documentation/PCI/pciebus-howto.rst
+
+:翻译:
+
+ 司延腾 Yanteng Si <siyanteng@loongson.cn>
+
+:校译:
+
+
+
+.. _cn_pciebus-howto:
+
+===========================
+PCI Express端口总线驱动指南
+===========================
+
+:作者: Tom L Nguyen tom.l.nguyen@intel.com 11/03/2004
+:版权: |copy| 2004 Intel Corporation
+
+关于本指南
+==========
+
+本指南介绍了PCI Express端口总线驱动程序的基本知识，并提供了如何使服务驱
+动程序在PCI Express端口总线驱动程序中注册/取消注册的介绍。
+
+
+什么是PCI Express端口总线驱动程序
+=================================
+
+一个PCI Express端口是一个逻辑的PCI-PCI桥结构。有两种类型的PCI Express端
+口：根端口和交换端口。根端口从PCI Express根综合体发起一个PCI Express链接，
+交换端口将PCI Express链接连接到内部逻辑PCI总线。交换机端口，其二级总线代表
+交换机的内部路由逻辑，被称为交换机的上行端口。交换机的下行端口是从交换机的内部
+路由总线桥接到代表来自PCI Express交换机的下游PCI Express链接的总线。
+
+一个PCI Express端口可以提供多达四个不同的功能，在本文中被称为服务，这取决于
+其端口类型。PCI Express端口的服务包括本地热拔插支持（HP）、电源管理事件支持（PME）、
+高级错误报告支持（AER）和虚拟通道支持（VC）。这些服务可以由一个复杂的驱动程序
+处理，也可以单独分布并由相应的服务驱动程序处理。
+
+为什么要使用PCI Express端口总线驱动程序？
+=========================================
+
+在现有的Linux内核中，Linux设备驱动模型允许一个物理设备只由一个驱动处理。
+PCI Express端口是一个具有多个不同服务的PCI-PCI桥设备。为了保持一个干净和简
+单的解决方案，每个服务都可以有自己的软件服务驱动。在这种情况下，几个服务驱动将
+竞争一个PCI-PCI桥设备。例如，如果PCI Express根端口的本机热拔插服务驱动程序
+首先被加载，它就会要求一个PCI-PCI桥根端口。因此，内核不会为该根端口加载其他服
+务驱动。换句话说，使用当前的驱动模型，不可能让多个服务驱动同时加载并运行在
+PCI-PCI桥设备上。
+
+为了使多个服务驱动程序同时运行，需要有一个PCI Express端口总线驱动程序，它管
+理所有填充的PCI Express端口，并根据需要将所有提供的服务请求分配给相应的服务
+驱动程序。下面列出了使用PCI Express端口总线驱动程序的一些关键优势:
+
+  - 允许在一个PCI-PCI桥接端口设备上同时运行多个服务驱动。
+
+  - 允许以独立的分阶段方式实施服务驱动程序。
+
+  - 允许一个服务驱动程序在多个PCI-PCI桥接端口设备上运行。
+
+  - 管理和分配PCI-PCI桥接端口设备的资源给要求的服务驱动程序。
+
+配置PCI Express端口总线驱动程序与服务驱动程序
+=============================================
+
+将PCI Express端口总线驱动支持纳入内核
+-------------------------------------
+
+包括PCI Express端口总线驱动程序取决于内核配置中是否包含PCI Express支持。当内核
+中的PCI Express支持被启用时，内核将自动包含PCI Express端口总线驱动程序作为内核
+驱动程序。
+
+启用服务驱动支持
+----------------
+
+PCI设备驱动是基于Linux设备驱动模型实现的。所有的服务驱动都是PCI设备驱动。如上所述，
+一旦内核加载了PCI Express端口总线驱动程序，就不可能再加载任何服务驱动程序。为了满
+足PCI Express端口总线驱动程序模型，需要对现有的服务驱动程序进行一些最小的改变，其
+对现有的服务驱动程序的功能没有影响。
+
+服务驱动程序需要使用下面所示的两个API，将其服务注册到PCI Express端口总线驱动程
+序中（见第5.2.1和5.2.2节）。在调用这些API之前，服务驱动程序必须初始化头文件
+/include/linux/pcieport_if.h中的pcie_port_service_driver数据结构。如果不这
+样做，将导致身份不匹配，从而使PCI Express端口总线驱动程序无法加载服务驱动程序。
+
+pcie_port_service_register
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+::
+
+  int pcie_port_service_register(struct pcie_port_service_driver *new)
+
+这个API取代了Linux驱动模型的 pci_register_driver API。一个服务驱动应该总是在模
+块启动时调用 pcie_port_service_register。请注意，在服务驱动被加载后，诸如
+pci_enable_device(dev) 和 pci_set_master(dev) 的调用不再需要，因为这些调用由
+PCI端口总线驱动执行。
+
+pcie_port_service_unregister
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+::
+
+  void pcie_port_service_unregister(struct pcie_port_service_driver *new)
+
+pcie_port_service_unregister取代了Linux驱动模型的pci_unregister_driver。当一
+个模块退出时，它总是被服务驱动调用。
+
+示例代码
+~~~~~~~~
+
+下面是服务驱动代码示例，用于初始化端口服务的驱动程序数据结构。
+::
+
+  static struct pcie_port_service_id service_id[] = { {
+    .vendor = PCI_ANY_ID,
+    .device = PCI_ANY_ID,
+    .port_type = PCIE_RC_PORT,
+    .service_type = PCIE_PORT_SERVICE_AER,
+    }, { /* end: all zeroes */ }
+  };
+
+  static struct pcie_port_service_driver root_aerdrv = {
+    .name		= (char *)device_name,
+    .id_table	= &service_id[0],
+
+    .probe		= aerdrv_load,
+    .remove		= aerdrv_unload,
+
+    .suspend	= aerdrv_suspend,
+    .resume		= aerdrv_resume,
+  };
+
+下面是一个注册/取消注册服务驱动的示例代码。
+::
+
+  static int __init aerdrv_service_init(void)
+  {
+    int retval = 0;
+
+    retval = pcie_port_service_register(&root_aerdrv);
+    if (!retval) {
+      /*
+      * FIX ME
+      */
+    }
+    return retval;
+  }
+
+  static void __exit aerdrv_service_exit(void)
+  {
+    pcie_port_service_unregister(&root_aerdrv);
+  }
+
+  module_init(aerdrv_service_init);
+  module_exit(aerdrv_service_exit);
+
+可能的资源冲突
+==============
+
+由于PCI-PCI桥接端口设备的所有服务驱动被允许同时运行，下面列出了一些可能的资源冲突和
+建议的解决方案。
+
+MSI 和 MSI-X 向量资源
+---------------------
+
+一旦设备上的MSI或MSI-X中断被启用，它就会一直保持这种模式，直到它们再次被禁用。由于同
+一个PCI-PCI桥接端口的服务驱动程序共享同一个物理设备，如果一个单独的服务驱动程序启用或
+禁用MSI/MSI-X模式，可能会导致不可预知的行为。
+
+为了避免这种情况，所有的服务驱动程序都不允许在其设备上切换中断模式。PCI Express端口
+总线驱动程序负责确定中断模式，这对服务驱动程序来说应该是透明的。服务驱动程序只需要知道
+分配给结构体pcie_device的字段irq的向量IRQ，当PCI Express端口总线驱动程序探测每
+个服务驱动程序时，它被传入。服务驱动应该使用（struct pcie_device*）dev->irq来调用
+request_irq/free_irq。此外，中断模式被存储在struct pcie_device的interrupt_mode
+字段中。
+
+PCI内存/IO映射的区域
+--------------------
+
+PCI Express电源管理（PME）、高级错误报告（AER）、热插拔（HP）和虚拟通道（VC）的服务
+驱动程序访问PCI Express端口的PCI配置空间。在所有情况下，访问的寄存器是相互独立的。这
+个补丁假定所有的服务驱动程序都会表现良好，不会覆盖其他服务驱动程序的配置设置。
+
+PCI配置寄存器
+-------------
+
+每个服务驱动都在自己的功能结构体上运行PCI配置操作，除了PCI Express功能结构体，其中根控制
+寄存器和设备控制寄存器是在PME和AER之间共享。这个补丁假定所有的服务驱动都会表现良好，不会
+覆盖其他服务驱动的配置设置。