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, 196 insertions, 0 deletions

diff --git a/arch/mips/dec/kn01-berr.c b/arch/mips/dec/kn01-berr.c
new file mode 100644
index 000000000..76efed7bc
--- /dev/null
+++ b/arch/mips/dec/kn01-berr.c
@@ -0,0 +1,196 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *	Bus error event handling code for DECstation/DECsystem 3100
+ *	and 2100 (KN01) systems equipped with parity error detection
+ *	logic.
+ *
+ *	Copyright (c) 2005  Maciej W. Rozycki
+ */
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+
+#include <asm/inst.h>
+#include <asm/irq_regs.h>
+#include <asm/mipsregs.h>
+#include <asm/page.h>
+#include <asm/ptrace.h>
+#include <asm/traps.h>
+#include <linux/uaccess.h>
+
+#include <asm/dec/kn01.h>
+
+
+/* CP0 hazard avoidance. */
+#define BARRIER				\
+	__asm__ __volatile__(		\
+		".set	push\n\t"	\
+		".set	noreorder\n\t"	\
+		"nop\n\t"		\
+		".set	pop\n\t")
+
+/*
+ * Bits 7:0 of the Control Register are write-only -- the
+ * corresponding bits of the Status Register have a different
+ * meaning.  Hence we use a cache.  It speeds up things a bit
+ * as well.
+ *
+ * There is no default value -- it has to be initialized.
+ */
+u16 cached_kn01_csr;
+static DEFINE_RAW_SPINLOCK(kn01_lock);
+
+
+static inline void dec_kn01_be_ack(void)
+{
+	volatile u16 *csr = (void *)CKSEG1ADDR(KN01_SLOT_BASE + KN01_CSR);
+	unsigned long flags;
+
+	raw_spin_lock_irqsave(&kn01_lock, flags);
+
+	*csr = cached_kn01_csr | KN01_CSR_MEMERR;	/* Clear bus IRQ. */
+	iob();
+
+	raw_spin_unlock_irqrestore(&kn01_lock, flags);
+}
+
+static int dec_kn01_be_backend(struct pt_regs *regs, int is_fixup, int invoker)
+{
+	volatile u32 *kn01_erraddr = (void *)CKSEG1ADDR(KN01_SLOT_BASE +
+							KN01_ERRADDR);
+
+	static const char excstr[] = "exception";
+	static const char intstr[] = "interrupt";
+	static const char cpustr[] = "CPU";
+	static const char mreadstr[] = "memory read";
+	static const char readstr[] = "read";
+	static const char writestr[] = "write";
+	static const char timestr[] = "timeout";
+	static const char paritystr[] = "parity error";
+
+	int data = regs->cp0_cause & 4;
+	unsigned int __user *pc = (unsigned int __user *)regs->cp0_epc +
+				  ((regs->cp0_cause & CAUSEF_BD) != 0);
+	union mips_instruction insn;
+	unsigned long entrylo, offset;
+	long asid, entryhi, vaddr;
+
+	const char *kind, *agent, *cycle, *event;
+	unsigned long address;
+
+	u32 erraddr = *kn01_erraddr;
+	int action = MIPS_BE_FATAL;
+
+	/* Ack ASAP, so that any subsequent errors get caught. */
+	dec_kn01_be_ack();
+
+	kind = invoker ? intstr : excstr;
+
+	agent = cpustr;
+
+	if (invoker)
+		address = erraddr;
+	else {
+		/* Bloody hardware doesn't record the address for reads... */
+		if (data) {
+			/* This never faults. */
+			__get_user(insn.word, pc);
+			vaddr = regs->regs[insn.i_format.rs] +
+				insn.i_format.simmediate;
+		} else
+			vaddr = (long)pc;
+		if (KSEGX(vaddr) == CKSEG0 || KSEGX(vaddr) == CKSEG1)
+			address = CPHYSADDR(vaddr);
+		else {
+			/* Peek at what physical address the CPU used. */
+			asid = read_c0_entryhi();
+			entryhi = asid & (PAGE_SIZE - 1);
+			entryhi |= vaddr & ~(PAGE_SIZE - 1);
+			write_c0_entryhi(entryhi);
+			BARRIER;
+			tlb_probe();
+			/* No need to check for presence. */
+			tlb_read();
+			entrylo = read_c0_entrylo0();
+			write_c0_entryhi(asid);
+			offset = vaddr & (PAGE_SIZE - 1);
+			address = (entrylo & ~(PAGE_SIZE - 1)) | offset;
+		}
+	}
+
+	/* Treat low 256MB as memory, high -- as I/O. */
+	if (address < 0x10000000) {
+		cycle = mreadstr;
+		event = paritystr;
+	} else {
+		cycle = invoker ? writestr : readstr;
+		event = timestr;
+	}
+
+	if (is_fixup)
+		action = MIPS_BE_FIXUP;
+
+	if (action != MIPS_BE_FIXUP)
+		printk(KERN_ALERT "Bus error %s: %s %s %s at %#010lx\n",
+			kind, agent, cycle, event, address);
+
+	return action;
+}
+
+int dec_kn01_be_handler(struct pt_regs *regs, int is_fixup)
+{
+	return dec_kn01_be_backend(regs, is_fixup, 0);
+}
+
+irqreturn_t dec_kn01_be_interrupt(int irq, void *dev_id)
+{
+	volatile u16 *csr = (void *)CKSEG1ADDR(KN01_SLOT_BASE + KN01_CSR);
+	struct pt_regs *regs = get_irq_regs();
+	int action;
+
+	if (!(*csr & KN01_CSR_MEMERR))
+		return IRQ_NONE;		/* Must have been video. */
+
+	action = dec_kn01_be_backend(regs, 0, 1);
+
+	if (action == MIPS_BE_DISCARD)
+		return IRQ_HANDLED;
+
+	/*
+	 * FIXME: Find the affected processes and kill them, otherwise
+	 * we must die.
+	 *
+	 * The interrupt is asynchronously delivered thus EPC and RA
+	 * may be irrelevant, but are printed for a reference.
+	 */
+	printk(KERN_ALERT "Fatal bus interrupt, epc == %08lx, ra == %08lx\n",
+	       regs->cp0_epc, regs->regs[31]);
+	die("Unrecoverable bus error", regs);
+}
+
+
+void __init dec_kn01_be_init(void)
+{
+	volatile u16 *csr = (void *)CKSEG1ADDR(KN01_SLOT_BASE + KN01_CSR);
+	unsigned long flags;
+
+	raw_spin_lock_irqsave(&kn01_lock, flags);
+
+	/* Preset write-only bits of the Control Register cache. */
+	cached_kn01_csr = *csr;
+	cached_kn01_csr &= KN01_CSR_STATUS | KN01_CSR_PARDIS | KN01_CSR_TXDIS;
+	cached_kn01_csr |= KN01_CSR_LEDS;
+
+	/* Enable parity error detection. */
+	cached_kn01_csr &= ~KN01_CSR_PARDIS;
+	*csr = cached_kn01_csr;
+	iob();
+
+	raw_spin_unlock_irqrestore(&kn01_lock, flags);
+
+	/* Clear any leftover errors from the firmware. */
+	dec_kn01_be_ack();
+}