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, 183 insertions, 0 deletions

diff --git a/Documentation/gpu/amdgpu/display/display-manager.rst b/Documentation/gpu/amdgpu/display/display-manager.rst
new file mode 100644
index 000000000..b7abb18cf
--- /dev/null
+++ b/Documentation/gpu/amdgpu/display/display-manager.rst
@@ -0,0 +1,183 @@
+======================
+AMDgpu Display Manager
+======================
+
+.. contents:: Table of Contents
+    :depth: 3
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+   :doc: overview
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
+   :internal:
+
+Lifecycle
+=========
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+   :doc: DM Lifecycle
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+   :functions: dm_hw_init dm_hw_fini
+
+Interrupts
+==========
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c
+   :doc: overview
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c
+   :internal:
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+   :functions: register_hpd_handlers dm_crtc_high_irq dm_pflip_high_irq
+
+Atomic Implementation
+=====================
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+   :doc: atomic
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+   :functions: amdgpu_dm_atomic_check amdgpu_dm_atomic_commit_tail
+
+Color Management Properties
+===========================
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
+   :doc: overview
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
+   :internal:
+
+
+DC Color Capabilities between DCN generations
+---------------------------------------------
+
+DRM/KMS framework defines three CRTC color correction properties: degamma,
+color transformation matrix (CTM) and gamma, and two properties for degamma and
+gamma LUT sizes. AMD DC programs some of the color correction features
+pre-blending but DRM/KMS has not per-plane color correction properties.
+
+In general, the DRM CRTC color properties are programmed to DC, as follows:
+CRTC gamma after blending, and CRTC degamma pre-blending. Although CTM is
+programmed after blending, it is mapped to DPP hw blocks (pre-blending). Other
+color caps available in the hw is not currently exposed by DRM interface and
+are bypassed.
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/dc/dc.h
+   :doc: color-management-caps
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/dc/dc.h
+   :internal:
+
+The color pipeline has undergone major changes between DCN hardware
+generations. What's possible to do before and after blending depends on
+hardware capabilities, as illustrated below by the DCN 2.0 and DCN 3.0 families
+schemas.
+
+**DCN 2.0 family color caps and mapping**
+
+.. kernel-figure:: dcn2_cm_drm_current.svg
+
+**DCN 3.0 family color caps and mapping**
+
+.. kernel-figure:: dcn3_cm_drm_current.svg
+
+Blend Mode Properties
+=====================
+
+Pixel blend mode is a DRM plane composition property of :c:type:`drm_plane` used to
+describes how pixels from a foreground plane (fg) are composited with the
+background plane (bg). Here, we present main concepts of DRM blend mode to help
+to understand how this property is mapped to AMD DC interface. See more about
+this DRM property and the alpha blending equations in :ref:`DRM Plane
+Composition Properties <plane_composition_properties>`.
+
+Basically, a blend mode sets the alpha blending equation for plane
+composition that fits the mode in which the alpha channel affects the state of
+pixel color values and, therefore, the resulted pixel color. For
+example, consider the following elements of the alpha blending equation:
+
+- *fg.rgb*: Each of the RGB component values from the foreground's pixel.
+- *fg.alpha*: Alpha component value from the foreground's pixel.
+- *bg.rgb*: Each of the RGB component values from the background.
+- *plane_alpha*: Plane alpha value set by the **plane "alpha" property**, see
+  more in :ref:`DRM Plane Composition Properties <plane_composition_properties>`.
+
+in the basic alpha blending equation::
+
+   out.rgb = alpha * fg.rgb + (1 - alpha) * bg.rgb
+
+the alpha channel value of each pixel in a plane is ignored and only the plane
+alpha affects the resulted pixel color values.
+
+DRM has three blend mode to define the blend formula in the plane composition:
+
+* **None**: Blend formula that ignores the pixel alpha.
+
+* **Pre-multiplied**: Blend formula that assumes the pixel color values in a
+  plane was already pre-multiplied by its own alpha channel before storage.
+
+* **Coverage**: Blend formula that assumes the pixel color values were not
+  pre-multiplied with the alpha channel values.
+
+and pre-multiplied is the default pixel blend mode, that means, when no blend
+mode property is created or defined, DRM considers the plane's pixels has
+pre-multiplied color values. On IGT GPU tools, the kms_plane_alpha_blend test
+provides a set of subtests to verify plane alpha and blend mode properties.
+
+The DRM blend mode and its elements are then mapped by AMDGPU display manager
+(DM) to program the blending configuration of the Multiple Pipe/Plane Combined
+(MPC), as follows:
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h
+   :doc: mpc-overview
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h
+   :functions: mpcc_blnd_cfg
+
+Therefore, the blending configuration for a single MPCC instance on the MPC
+tree is defined by :c:type:`mpcc_blnd_cfg`, where
+:c:type:`pre_multiplied_alpha` is the alpha pre-multiplied mode flag used to
+set :c:type:`MPCC_ALPHA_MULTIPLIED_MODE`. It controls whether alpha is
+multiplied (true/false), being only true for DRM pre-multiplied blend mode.
+:c:type:`mpcc_alpha_blend_mode` defines the alpha blend mode regarding pixel
+alpha and plane alpha values. It sets one of the three modes for
+:c:type:`MPCC_ALPHA_BLND_MODE`, as described below.
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h
+   :functions: mpcc_alpha_blend_mode
+
+DM then maps the elements of `enum mpcc_alpha_blend_mode` to those in the DRM
+blend formula, as follows:
+
+* *MPC pixel alpha* matches *DRM fg.alpha* as the alpha component value
+  from the plane's pixel
+* *MPC global alpha* matches *DRM plane_alpha* when the pixel alpha should
+  be ignored and, therefore, pixel values are not pre-multiplied
+* *MPC global gain* assumes *MPC global alpha* value when both *DRM
+  fg.alpha* and *DRM plane_alpha* participate in the blend equation
+
+In short, *fg.alpha* is ignored by selecting
+:c:type:`MPCC_ALPHA_BLEND_MODE_GLOBAL_ALPHA`. On the other hand, (plane_alpha *
+fg.alpha) component becomes available by selecting
+:c:type:`MPCC_ALPHA_BLEND_MODE_PER_PIXEL_ALPHA_COMBINED_GLOBAL_GAIN`. And the
+:c:type:`MPCC_ALPHA_MULTIPLIED_MODE` defines if the pixel color values are
+pre-multiplied by alpha or not.
+
+Blend configuration flow
+------------------------
+
+The alpha blending equation is configured from DRM to DC interface by the
+following path:
+
+1. When updating a :c:type:`drm_plane_state <drm_plane_state>`, DM calls
+   :c:type:`fill_blending_from_plane_state()` that maps
+   :c:type:`drm_plane_state <drm_plane_state>` attributes to
+   :c:type:`dc_plane_info <dc_plane_info>` struct to be handled in the
+   OS-agnostic component (DC).
+
+2. On DC interface, :c:type:`struct mpcc_blnd_cfg <mpcc_blnd_cfg>` programs the
+   MPCC blend configuration considering the :c:type:`dc_plane_info
+   <dc_plane_info>` input from DPP.