Merge tag 'net-next-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Paolo Abeni:
 "Core & protocols:

   - Improve drop account scalability on NUMA hosts for RAW and UDP
     sockets and the backlog, almost doubling the Pps capacity under DoS

   - Optimize the UDP RX performance under stress, reducing contention,
     revisiting the binary layout of the involved data structs and
     implementing NUMA-aware locking. This improves UDP RX performance
     by an additional 50%, even more under extreme conditions

   - Add support for PSP encryption of TCP connections; this mechanism
     has some similarities with IPsec and TLS, but offers superior HW
     offloads capabilities

   - Ongoing work to support Accurate ECN for TCP. AccECN allows more
     than one congestion notification signal per RTT and is a building
     block for Low Latency, Low Loss, and Scalable Throughput (L4S)

   - Reorganize the TCP socket binary layout for data locality, reducing
     the number of touched cachelines in the fastpath

   - Refactor skb deferral free to better scale on large multi-NUMA
     hosts, this improves TCP and UDP RX performances significantly on
     such HW

   - Increase the default socket memory buffer limits from 256K to 4M to
     better fit modern link speeds

   - Improve handling of setups with a large number of nexthop, making
     dump operating scaling linearly and avoiding unneeded
     synchronize_rcu() on delete

   - Improve bridge handling of VLAN FDB, storing a single entry per
     bridge instead of one entry per port; this makes the dump order of
     magnitude faster on large switches

   - Restore IP ID correctly for encapsulated packets at GSO
     segmentation time, allowing GRO to merge packets in more scenarios

   - Improve netfilter matching performance on large sets

   - Improve MPTCP receive path performance by leveraging recently
     introduced core infrastructure (skb deferral free) and adopting
     recent TCP autotuning changes

   - Allow bridges to redirect to a backup port when the bridge port is
     administratively down

   - Introduce MPTCP 'laminar' endpoint that con be used only once per
     connection and simplify common MPTCP setups

   - Add RCU safety to dst->dev, closing a lot of possible races

   - A significant crypto library API for SCTP, MPTCP and IPv6 SR,
     reducing code duplication

   - Supports pulling data from an skb frag into the linear area of an
     XDP buffer

  Things we sprinkled into general kernel code:

   - Generate netlink documentation from YAML using an integrated YAML
     parser

  Driver API:

   - Support using IPv6 Flow Label in Rx hash computation and RSS queue
     selection

   - Introduce API for fetching the DMA device for a given queue,
     allowing TCP zerocopy RX on more H/W setups

   - Make XDP helpers compatible with unreadable memory, allowing more
     easily building DevMem-enabled drivers with a unified XDP/skbs
     datapath

   - Add a new dedicated ethtool callback enabling drivers to provide
     the number of RX rings directly, improving efficiency and clarity
     in RX ring queries and RSS configuration

   - Introduce a burst period for the health reporter, allowing better
     handling of multiple errors due to the same root cause

   - Support for DPLL phase offset exponential moving average,
     controlling the average smoothing factor

  Device drivers:

   - Add a new Huawei driver for 3rd gen NIC (hinic3)

   - Add a new SpacemiT driver for K1 ethernet MAC

   - Add a generic abstraction for shared memory communication
     devices (dibps)

   - Ethernet high-speed NICs:
      - nVidia/Mellanox:
         - Use multiple per-queue doorbell, to avoid MMIO contention
           issues
         - support adjacent functions, allowing them to delegate their
           SR-IOV VFs to sibling PFs
         - support RSS for IPSec offload
         - support exposing raw cycle counters in PTP and mlx5
         - support for disabling host PFs.
      - Intel (100G, ice, idpf):
         - ice: support for SRIOV VFs over an Active-Active link
           aggregate
         - ice: support for firmware logging via debugfs
         - ice: support for Earliest TxTime First (ETF) hardware offload
         - idpf: support basic XDP functionalities and XSk
      - Broadcom (bnxt):
         - support Hyper-V VF ID
         - dynamic SRIOV resource allocations for RoCE
      - Meta (fbnic):
         - support queue API, zero-copy Rx and Tx
         - support basic XDP functionalities
         - devlink health support for FW crashes and OTP mem corruptions
         - expand hardware stats coverage to FEC, PHY, and Pause
      - Wangxun:
         - support ethtool coalesce options
         - support for multiple RSS contexts

   - Ethernet virtual:
      - Macsec:
         - replace custom netlink attribute checks with policy-level
           checks
      - Bonding:
         - support aggregator selection based on port priority
      - Microsoft vNIC:
         - use page pool fragments for RX buffers instead of full pages
           to improve memory efficiency

   - Ethernet NICs consumer, and embedded:
      - Qualcomm: support Ethernet function for IPQ9574 SoC
      - Airoha: implement wlan offloading via NPU
      - Freescale
         - enetc: add NETC timer PTP driver and add PTP support
         - fec: enable the Jumbo frame support for i.MX8QM
      - Renesas (R-Car S4):
         - support HW offloading for layer 2 switching
         - support for RZ/{T2H, N2H} SoCs
      - Cadence (macb): support TAPRIO traffic scheduling
      - TI:
         - support for Gigabit ICSS ethernet SoC (icssm-prueth)
      - Synopsys (stmmac): a lot of cleanups

   - Ethernet PHYs:
      - Support 10g-qxgmi phy-mode for AQR412C, Felix DSA and Lynx PCS
        driver
      - Support bcm63268 GPHY power control
      - Support for Micrel lan8842 PHY and PTP
      - Support for Aquantia AQR412 and AQR115

   - CAN:
      - a large CAN-XL preparation work
      - reorganize raw_sock and uniqframe struct to minimize memory
        usage
      - rcar_canfd: update the CAN-FD handling

   - WiFi:
      - extended Neighbor Awareness Networking (NAN) support
      - S1G channel representation cleanup
      - improve S1G support

   - WiFi drivers:
      - Intel (iwlwifi):
         - major refactor and cleanup
      - Broadcom (brcm80211):
         - support for AP isolation
      - RealTek (rtw88/89) rtw88/89:
         - preparation work for RTL8922DE support
      - MediaTek (mt76):
         - HW restart improvements
         - MLO support
      - Qualcomm/Atheros (ath10k):
         - GTK rekey fixes

   - Bluetooth drivers:
      - btusb: support for several new IDs for MT7925
      - btintel: support for BlazarIW core
      - btintel_pcie: support for _suspend() / _resume()
      - btintel_pcie: support for Scorpious, Panther Lake-H484 IDs"

* tag 'net-next-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1536 commits)
  net: stmmac: Add support for Allwinner A523 GMAC200
  dt-bindings: net: sun8i-emac: Add A523 GMAC200 compatible
  Revert "Documentation: net: add flow control guide and document ethtool API"
  octeontx2-pf: fix bitmap leak
  octeontx2-vf: fix bitmap leak
  net/mlx5e: Use extack in set rxfh callback
  net/mlx5e: Introduce mlx5e_rss_params for RSS configuration
  net/mlx5e: Introduce mlx5e_rss_init_params
  net/mlx5e: Remove unused mdev param from RSS indir init
  net/mlx5: Improve QoS error messages with actual depth values
  net/mlx5e: Prevent entering switchdev mode with inconsistent netns
  net/mlx5: HWS, Generalize complex matchers
  net/mlx5: Improve write-combining test reliability for ARM64 Grace CPUs
  selftests/net: add tcp_port_share to .gitignore
  Revert "net/mlx5e: Update and set Xon/Xoff upon MTU set"
  net: add NUMA awareness to skb_attempt_defer_free()
  net: use llist for sd->defer_list
  net: make softnet_data.defer_count an atomic
  selftests: drv-net: psp: add tests for destroying devices
  selftests: drv-net: psp: add test for auto-adjusting TCP MSS
  ...

1 files changed, 184 insertions, 0 deletions

diff --git a/include/net/psp/types.h b/include/net/psp/types.h
new file mode 100644
index 000000000000..31cee64b7c86
--- /dev/null
+++ b/include/net/psp/types.h
@@ -0,0 +1,184 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __NET_PSP_H
+#define __NET_PSP_H
+
+#include <linux/mutex.h>
+#include <linux/refcount.h>
+
+struct netlink_ext_ack;
+
+#define PSP_DEFAULT_UDP_PORT	1000
+
+struct psphdr {
+	u8	nexthdr;
+	u8	hdrlen;
+	u8	crypt_offset;
+	u8	verfl;
+	__be32	spi;
+	__be64	iv;
+	__be64	vc[]; /* optional */
+};
+
+#define PSP_ENCAP_HLEN (sizeof(struct udphdr) + sizeof(struct psphdr))
+
+#define PSP_SPI_KEY_ID		GENMASK(30, 0)
+#define PSP_SPI_KEY_PHASE	BIT(31)
+
+#define PSPHDR_CRYPT_OFFSET	GENMASK(5, 0)
+
+#define PSPHDR_VERFL_SAMPLE	BIT(7)
+#define PSPHDR_VERFL_DROP	BIT(6)
+#define PSPHDR_VERFL_VERSION	GENMASK(5, 2)
+#define PSPHDR_VERFL_VIRT	BIT(1)
+#define PSPHDR_VERFL_ONE	BIT(0)
+
+#define PSP_HDRLEN_NOOPT	((sizeof(struct psphdr) - 8) / 8)
+
+/**
+ * struct psp_dev_config - PSP device configuration
+ * @versions: PSP versions enabled on the device
+ */
+struct psp_dev_config {
+	u32 versions;
+};
+
+/**
+ * struct psp_dev - PSP device struct
+ * @main_netdev: original netdevice of this PSP device
+ * @ops:	driver callbacks
+ * @caps:	device capabilities
+ * @drv_priv:	driver priv pointer
+ * @lock:	instance lock, protects all fields
+ * @refcnt:	reference count for the instance
+ * @id:		instance id
+ * @generation:	current generation of the device key
+ * @config:	current device configuration
+ * @active_assocs:	list of registered associations
+ * @prev_assocs:	associations which use old (but still usable)
+ *			device key
+ * @stale_assocs:	associations which use a rotated out key
+ *
+ * @rcu:	RCU head for freeing the structure
+ */
+struct psp_dev {
+	struct net_device *main_netdev;
+
+	struct psp_dev_ops *ops;
+	struct psp_dev_caps *caps;
+	void *drv_priv;
+
+	struct mutex lock;
+	refcount_t refcnt;
+
+	u32 id;
+
+	u8 generation;
+
+	struct psp_dev_config config;
+
+	struct list_head active_assocs;
+	struct list_head prev_assocs;
+	struct list_head stale_assocs;
+
+	struct rcu_head rcu;
+};
+
+#define PSP_GEN_VALID_MASK	0x7f
+
+/**
+ * struct psp_dev_caps - PSP device capabilities
+ */
+struct psp_dev_caps {
+	/**
+	 * @versions: mask of supported PSP versions
+	 * Set this field to 0 to indicate PSP is not supported at all.
+	 */
+	u32 versions;
+
+	/**
+	 * @assoc_drv_spc: size of driver-specific state in Tx assoc
+	 * Determines the size of struct psp_assoc::drv_data
+	 */
+	u32 assoc_drv_spc;
+};
+
+#define PSP_MAX_KEY	32
+
+#define PSP_HDR_SIZE	16	/* We don't support optional fields, yet */
+#define PSP_TRL_SIZE	16	/* AES-GCM/GMAC trailer size */
+
+struct psp_skb_ext {
+	__be32 spi;
+	u16 dev_id;
+	u8 generation;
+	u8 version;
+};
+
+struct psp_key_parsed {
+	__be32 spi;
+	u8 key[PSP_MAX_KEY];
+};
+
+struct psp_assoc {
+	struct psp_dev *psd;
+
+	u16 dev_id;
+	u8 generation;
+	u8 version;
+	u8 peer_tx;
+
+	u32 upgrade_seq;
+
+	struct psp_key_parsed tx;
+	struct psp_key_parsed rx;
+
+	refcount_t refcnt;
+	struct rcu_head rcu;
+	struct work_struct work;
+	struct list_head assocs_list;
+
+	u8 drv_data[] __aligned(8);
+};
+
+/**
+ * struct psp_dev_ops - netdev driver facing PSP callbacks
+ */
+struct psp_dev_ops {
+	/**
+	 * @set_config: set configuration of a PSP device
+	 * Driver can inspect @psd->config for the previous configuration.
+	 * Core will update @psd->config with @config on success.
+	 */
+	int (*set_config)(struct psp_dev *psd, struct psp_dev_config *conf,
+			  struct netlink_ext_ack *extack);
+
+	/**
+	 * @key_rotate: rotate the device key
+	 */
+	int (*key_rotate)(struct psp_dev *psd, struct netlink_ext_ack *extack);
+
+	/**
+	 * @rx_spi_alloc: allocate an Rx SPI+key pair
+	 * Allocate an Rx SPI and resulting derived key.
+	 * This key should remain valid until key rotation.
+	 */
+	int (*rx_spi_alloc)(struct psp_dev *psd, u32 version,
+			    struct psp_key_parsed *assoc,
+			    struct netlink_ext_ack *extack);
+
+	/**
+	 * @tx_key_add: add a Tx key to the device
+	 * Install an association in the device. Core will allocate space
+	 * for the driver to use at drv_data.
+	 */
+	int (*tx_key_add)(struct psp_dev *psd, struct psp_assoc *pas,
+			  struct netlink_ext_ack *extack);
+	/**
+	 * @tx_key_del: remove a Tx key from the device
+	 * Remove an association from the device.
+	 */
+	void (*tx_key_del)(struct psp_dev *psd, struct psp_assoc *pas);
+};
+
+#endif /* __NET_PSP_H */