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, 374 insertions, 0 deletions

diff --git a/arch/arm/mm/cache-b15-rac.c b/arch/arm/mm/cache-b15-rac.c
new file mode 100644
index 000000000..9c1172f26
--- /dev/null
+++ b/arch/arm/mm/cache-b15-rac.c
@@ -0,0 +1,374 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Broadcom Brahma-B15 CPU read-ahead cache management functions
+ *
+ * Copyright (C) 2015-2016 Broadcom
+ */
+
+#include <linux/err.h>
+#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <linux/bitops.h>
+#include <linux/of_address.h>
+#include <linux/notifier.h>
+#include <linux/cpu.h>
+#include <linux/syscore_ops.h>
+#include <linux/reboot.h>
+
+#include <asm/cacheflush.h>
+#include <asm/hardware/cache-b15-rac.h>
+
+extern void v7_flush_kern_cache_all(void);
+
+/* RAC register offsets, relative to the HIF_CPU_BIUCTRL register base */
+#define RAC_CONFIG0_REG			(0x78)
+#define  RACENPREF_MASK			(0x3)
+#define  RACPREFINST_SHIFT		(0)
+#define  RACENINST_SHIFT		(2)
+#define  RACPREFDATA_SHIFT		(4)
+#define  RACENDATA_SHIFT		(6)
+#define  RAC_CPU_SHIFT			(8)
+#define  RACCFG_MASK			(0xff)
+#define RAC_CONFIG1_REG			(0x7c)
+/* Brahma-B15 is a quad-core only design */
+#define B15_RAC_FLUSH_REG		(0x80)
+/* Brahma-B53 is an octo-core design */
+#define B53_RAC_FLUSH_REG		(0x84)
+#define  FLUSH_RAC			(1 << 0)
+
+/* Bitmask to enable instruction and data prefetching with a 256-bytes stride */
+#define RAC_DATA_INST_EN_MASK		(1 << RACPREFINST_SHIFT | \
+					 RACENPREF_MASK << RACENINST_SHIFT | \
+					 1 << RACPREFDATA_SHIFT | \
+					 RACENPREF_MASK << RACENDATA_SHIFT)
+
+#define RAC_ENABLED			0
+/* Special state where we want to bypass the spinlock and call directly
+ * into the v7 cache maintenance operations during suspend/resume
+ */
+#define RAC_SUSPENDED			1
+
+static void __iomem *b15_rac_base;
+static DEFINE_SPINLOCK(rac_lock);
+
+static u32 rac_config0_reg;
+static u32 rac_flush_offset;
+
+/* Initialization flag to avoid checking for b15_rac_base, and to prevent
+ * multi-platform kernels from crashing here as well.
+ */
+static unsigned long b15_rac_flags;
+
+static inline u32 __b15_rac_disable(void)
+{
+	u32 val = __raw_readl(b15_rac_base + RAC_CONFIG0_REG);
+	__raw_writel(0, b15_rac_base + RAC_CONFIG0_REG);
+	dmb();
+	return val;
+}
+
+static inline void __b15_rac_flush(void)
+{
+	u32 reg;
+
+	__raw_writel(FLUSH_RAC, b15_rac_base + rac_flush_offset);
+	do {
+		/* This dmb() is required to force the Bus Interface Unit
+		 * to clean outstanding writes, and forces an idle cycle
+		 * to be inserted.
+		 */
+		dmb();
+		reg = __raw_readl(b15_rac_base + rac_flush_offset);
+	} while (reg & FLUSH_RAC);
+}
+
+static inline u32 b15_rac_disable_and_flush(void)
+{
+	u32 reg;
+
+	reg = __b15_rac_disable();
+	__b15_rac_flush();
+	return reg;
+}
+
+static inline void __b15_rac_enable(u32 val)
+{
+	__raw_writel(val, b15_rac_base + RAC_CONFIG0_REG);
+	/* dsb() is required here to be consistent with __flush_icache_all() */
+	dsb();
+}
+
+#define BUILD_RAC_CACHE_OP(name, bar)				\
+void b15_flush_##name(void)					\
+{								\
+	unsigned int do_flush;					\
+	u32 val = 0;						\
+								\
+	if (test_bit(RAC_SUSPENDED, &b15_rac_flags)) {		\
+		v7_flush_##name();				\
+		bar;						\
+		return;						\
+	}							\
+								\
+	spin_lock(&rac_lock);					\
+	do_flush = test_bit(RAC_ENABLED, &b15_rac_flags);	\
+	if (do_flush)						\
+		val = b15_rac_disable_and_flush();		\
+	v7_flush_##name();					\
+	if (!do_flush)						\
+		bar;						\
+	else							\
+		__b15_rac_enable(val);				\
+	spin_unlock(&rac_lock);					\
+}
+
+#define nobarrier
+
+/* The readahead cache present in the Brahma-B15 CPU is a special piece of
+ * hardware after the integrated L2 cache of the B15 CPU complex whose purpose
+ * is to prefetch instruction and/or data with a line size of either 64 bytes
+ * or 256 bytes. The rationale is that the data-bus of the CPU interface is
+ * optimized for 256-bytes transactions, and enabling the readahead cache
+ * provides a significant performance boost we want it enabled (typically
+ * twice the performance for a memcpy benchmark application).
+ *
+ * The readahead cache is transparent for Modified Virtual Addresses
+ * cache maintenance operations: ICIMVAU, DCIMVAC, DCCMVAC, DCCMVAU and
+ * DCCIMVAC.
+ *
+ * It is however not transparent for the following cache maintenance
+ * operations: DCISW, DCCSW, DCCISW, ICIALLUIS and ICIALLU which is precisely
+ * what we are patching here with our BUILD_RAC_CACHE_OP here.
+ */
+BUILD_RAC_CACHE_OP(kern_cache_all, nobarrier);
+
+static void b15_rac_enable(void)
+{
+	unsigned int cpu;
+	u32 enable = 0;
+
+	for_each_possible_cpu(cpu)
+		enable |= (RAC_DATA_INST_EN_MASK << (cpu * RAC_CPU_SHIFT));
+
+	b15_rac_disable_and_flush();
+	__b15_rac_enable(enable);
+}
+
+static int b15_rac_reboot_notifier(struct notifier_block *nb,
+				   unsigned long action,
+				   void *data)
+{
+	/* During kexec, we are not yet migrated on the boot CPU, so we need to
+	 * make sure we are SMP safe here. Once the RAC is disabled, flag it as
+	 * suspended such that the hotplug notifier returns early.
+	 */
+	if (action == SYS_RESTART) {
+		spin_lock(&rac_lock);
+		b15_rac_disable_and_flush();
+		clear_bit(RAC_ENABLED, &b15_rac_flags);
+		set_bit(RAC_SUSPENDED, &b15_rac_flags);
+		spin_unlock(&rac_lock);
+	}
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block b15_rac_reboot_nb = {
+	.notifier_call	= b15_rac_reboot_notifier,
+};
+
+/* The CPU hotplug case is the most interesting one, we basically need to make
+ * sure that the RAC is disabled for the entire system prior to having a CPU
+ * die, in particular prior to this dying CPU having exited the coherency
+ * domain.
+ *
+ * Once this CPU is marked dead, we can safely re-enable the RAC for the
+ * remaining CPUs in the system which are still online.
+ *
+ * Offlining a CPU is the problematic case, onlining a CPU is not much of an
+ * issue since the CPU and its cache-level hierarchy will start filling with
+ * the RAC disabled, so L1 and L2 only.
+ *
+ * In this function, we should NOT have to verify any unsafe setting/condition
+ * b15_rac_base:
+ *
+ *   It is protected by the RAC_ENABLED flag which is cleared by default, and
+ *   being cleared when initial procedure is done. b15_rac_base had been set at
+ *   that time.
+ *
+ * RAC_ENABLED:
+ *   There is a small timing windows, in b15_rac_init(), between
+ *      cpuhp_setup_state_*()
+ *      ...
+ *      set RAC_ENABLED
+ *   However, there is no hotplug activity based on the Linux booting procedure.
+ *
+ * Since we have to disable RAC for all cores, we keep RAC on as long as as
+ * possible (disable it as late as possible) to gain the cache benefit.
+ *
+ * Thus, dying/dead states are chosen here
+ *
+ * We are choosing not do disable the RAC on a per-CPU basis, here, if we did
+ * we would want to consider disabling it as early as possible to benefit the
+ * other active CPUs.
+ */
+
+/* Running on the dying CPU */
+static int b15_rac_dying_cpu(unsigned int cpu)
+{
+	/* During kexec/reboot, the RAC is disabled via the reboot notifier
+	 * return early here.
+	 */
+	if (test_bit(RAC_SUSPENDED, &b15_rac_flags))
+		return 0;
+
+	spin_lock(&rac_lock);
+
+	/* Indicate that we are starting a hotplug procedure */
+	__clear_bit(RAC_ENABLED, &b15_rac_flags);
+
+	/* Disable the readahead cache and save its value to a global */
+	rac_config0_reg = b15_rac_disable_and_flush();
+
+	spin_unlock(&rac_lock);
+
+	return 0;
+}
+
+/* Running on a non-dying CPU */
+static int b15_rac_dead_cpu(unsigned int cpu)
+{
+	/* During kexec/reboot, the RAC is disabled via the reboot notifier
+	 * return early here.
+	 */
+	if (test_bit(RAC_SUSPENDED, &b15_rac_flags))
+		return 0;
+
+	spin_lock(&rac_lock);
+
+	/* And enable it */
+	__b15_rac_enable(rac_config0_reg);
+	__set_bit(RAC_ENABLED, &b15_rac_flags);
+
+	spin_unlock(&rac_lock);
+
+	return 0;
+}
+
+static int b15_rac_suspend(void)
+{
+	/* Suspend the read-ahead cache oeprations, forcing our cache
+	 * implementation to fallback to the regular ARMv7 calls.
+	 *
+	 * We are guaranteed to be running on the boot CPU at this point and
+	 * with every other CPU quiesced, so setting RAC_SUSPENDED is not racy
+	 * here.
+	 */
+	rac_config0_reg = b15_rac_disable_and_flush();
+	set_bit(RAC_SUSPENDED, &b15_rac_flags);
+
+	return 0;
+}
+
+static void b15_rac_resume(void)
+{
+	/* Coming out of a S3 suspend/resume cycle, the read-ahead cache
+	 * register RAC_CONFIG0_REG will be restored to its default value, make
+	 * sure we re-enable it and set the enable flag, we are also guaranteed
+	 * to run on the boot CPU, so not racy again.
+	 */
+	__b15_rac_enable(rac_config0_reg);
+	clear_bit(RAC_SUSPENDED, &b15_rac_flags);
+}
+
+static struct syscore_ops b15_rac_syscore_ops = {
+	.suspend	= b15_rac_suspend,
+	.resume		= b15_rac_resume,
+};
+
+static int __init b15_rac_init(void)
+{
+	struct device_node *dn, *cpu_dn;
+	int ret = 0, cpu;
+	u32 reg, en_mask = 0;
+
+	dn = of_find_compatible_node(NULL, NULL, "brcm,brcmstb-cpu-biu-ctrl");
+	if (!dn)
+		return -ENODEV;
+
+	if (WARN(num_possible_cpus() > 4, "RAC only supports 4 CPUs\n"))
+		goto out;
+
+	b15_rac_base = of_iomap(dn, 0);
+	if (!b15_rac_base) {
+		pr_err("failed to remap BIU control base\n");
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	cpu_dn = of_get_cpu_node(0, NULL);
+	if (!cpu_dn) {
+		ret = -ENODEV;
+		goto out;
+	}
+
+	if (of_device_is_compatible(cpu_dn, "brcm,brahma-b15"))
+		rac_flush_offset = B15_RAC_FLUSH_REG;
+	else if (of_device_is_compatible(cpu_dn, "brcm,brahma-b53"))
+		rac_flush_offset = B53_RAC_FLUSH_REG;
+	else {
+		pr_err("Unsupported CPU\n");
+		of_node_put(cpu_dn);
+		ret = -EINVAL;
+		goto out;
+	}
+	of_node_put(cpu_dn);
+
+	ret = register_reboot_notifier(&b15_rac_reboot_nb);
+	if (ret) {
+		pr_err("failed to register reboot notifier\n");
+		iounmap(b15_rac_base);
+		goto out;
+	}
+
+	if (IS_ENABLED(CONFIG_HOTPLUG_CPU)) {
+		ret = cpuhp_setup_state_nocalls(CPUHP_AP_ARM_CACHE_B15_RAC_DEAD,
+					"arm/cache-b15-rac:dead",
+					NULL, b15_rac_dead_cpu);
+		if (ret)
+			goto out_unmap;
+
+		ret = cpuhp_setup_state_nocalls(CPUHP_AP_ARM_CACHE_B15_RAC_DYING,
+					"arm/cache-b15-rac:dying",
+					NULL, b15_rac_dying_cpu);
+		if (ret)
+			goto out_cpu_dead;
+	}
+
+	if (IS_ENABLED(CONFIG_PM_SLEEP))
+		register_syscore_ops(&b15_rac_syscore_ops);
+
+	spin_lock(&rac_lock);
+	reg = __raw_readl(b15_rac_base + RAC_CONFIG0_REG);
+	for_each_possible_cpu(cpu)
+		en_mask |= ((1 << RACPREFDATA_SHIFT) << (cpu * RAC_CPU_SHIFT));
+	WARN(reg & en_mask, "Read-ahead cache not previously disabled\n");
+
+	b15_rac_enable();
+	set_bit(RAC_ENABLED, &b15_rac_flags);
+	spin_unlock(&rac_lock);
+
+	pr_info("%pOF: Broadcom Brahma-B15 readahead cache\n", dn);
+
+	goto out;
+
+out_cpu_dead:
+	cpuhp_remove_state_nocalls(CPUHP_AP_ARM_CACHE_B15_RAC_DYING);
+out_unmap:
+	unregister_reboot_notifier(&b15_rac_reboot_nb);
+	iounmap(b15_rac_base);
+out:
+	of_node_put(dn);
+	return ret;
+}
+arch_initcall(b15_rac_init);