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, 244 insertions, 0 deletions

diff --git a/drivers/watchdog/pic32-wdt.c b/drivers/watchdog/pic32-wdt.c
new file mode 100644
index 000000000..41715d68d
--- /dev/null
+++ b/drivers/watchdog/pic32-wdt.c
@@ -0,0 +1,244 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * PIC32 watchdog driver
+ *
+ * Joshua Henderson <joshua.henderson@microchip.com>
+ * Copyright (c) 2016, Microchip Technology Inc.
+ */
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/watchdog.h>
+
+#include <asm/mach-pic32/pic32.h>
+
+/* Watchdog Timer Registers */
+#define WDTCON_REG		0x00
+
+/* Watchdog Timer Control Register fields */
+#define WDTCON_WIN_EN		BIT(0)
+#define WDTCON_RMCS_MASK	0x0003
+#define WDTCON_RMCS_SHIFT	0x0006
+#define WDTCON_RMPS_MASK	0x001F
+#define WDTCON_RMPS_SHIFT	0x0008
+#define WDTCON_ON		BIT(15)
+#define WDTCON_CLR_KEY		0x5743
+
+/* Reset Control Register fields for watchdog */
+#define RESETCON_TIMEOUT_IDLE	BIT(2)
+#define RESETCON_TIMEOUT_SLEEP	BIT(3)
+#define RESETCON_WDT_TIMEOUT	BIT(4)
+
+struct pic32_wdt {
+	void __iomem	*regs;
+	void __iomem	*rst_base;
+	struct clk	*clk;
+};
+
+static inline bool pic32_wdt_is_win_enabled(struct pic32_wdt *wdt)
+{
+	return !!(readl(wdt->regs + WDTCON_REG) & WDTCON_WIN_EN);
+}
+
+static inline u32 pic32_wdt_get_post_scaler(struct pic32_wdt *wdt)
+{
+	u32 v = readl(wdt->regs + WDTCON_REG);
+
+	return (v >> WDTCON_RMPS_SHIFT) & WDTCON_RMPS_MASK;
+}
+
+static inline u32 pic32_wdt_get_clk_id(struct pic32_wdt *wdt)
+{
+	u32 v = readl(wdt->regs + WDTCON_REG);
+
+	return (v >> WDTCON_RMCS_SHIFT) & WDTCON_RMCS_MASK;
+}
+
+static int pic32_wdt_bootstatus(struct pic32_wdt *wdt)
+{
+	u32 v = readl(wdt->rst_base);
+
+	writel(RESETCON_WDT_TIMEOUT, PIC32_CLR(wdt->rst_base));
+
+	return v & RESETCON_WDT_TIMEOUT;
+}
+
+static u32 pic32_wdt_get_timeout_secs(struct pic32_wdt *wdt, struct device *dev)
+{
+	unsigned long rate;
+	u32 period, ps, terminal;
+
+	rate = clk_get_rate(wdt->clk);
+
+	dev_dbg(dev, "wdt: clk_id %d, clk_rate %lu (prescale)\n",
+		pic32_wdt_get_clk_id(wdt), rate);
+
+	/* default, prescaler of 32 (i.e. div-by-32) is implicit. */
+	rate >>= 5;
+	if (!rate)
+		return 0;
+
+	/* calculate terminal count from postscaler. */
+	ps = pic32_wdt_get_post_scaler(wdt);
+	terminal = BIT(ps);
+
+	/* find time taken (in secs) to reach terminal count */
+	period = terminal / rate;
+	dev_dbg(dev,
+		"wdt: clk_rate %lu (postscale) / terminal %d, timeout %dsec\n",
+		rate, terminal, period);
+
+	return period;
+}
+
+static void pic32_wdt_keepalive(struct pic32_wdt *wdt)
+{
+	/* write key through single half-word */
+	writew(WDTCON_CLR_KEY, wdt->regs + WDTCON_REG + 2);
+}
+
+static int pic32_wdt_start(struct watchdog_device *wdd)
+{
+	struct pic32_wdt *wdt = watchdog_get_drvdata(wdd);
+
+	writel(WDTCON_ON, PIC32_SET(wdt->regs + WDTCON_REG));
+	pic32_wdt_keepalive(wdt);
+
+	return 0;
+}
+
+static int pic32_wdt_stop(struct watchdog_device *wdd)
+{
+	struct pic32_wdt *wdt = watchdog_get_drvdata(wdd);
+
+	writel(WDTCON_ON, PIC32_CLR(wdt->regs + WDTCON_REG));
+
+	/*
+	 * Cannot touch registers in the CPU cycle following clearing the
+	 * ON bit.
+	 */
+	nop();
+
+	return 0;
+}
+
+static int pic32_wdt_ping(struct watchdog_device *wdd)
+{
+	struct pic32_wdt *wdt = watchdog_get_drvdata(wdd);
+
+	pic32_wdt_keepalive(wdt);
+
+	return 0;
+}
+
+static const struct watchdog_ops pic32_wdt_fops = {
+	.owner		= THIS_MODULE,
+	.start		= pic32_wdt_start,
+	.stop		= pic32_wdt_stop,
+	.ping		= pic32_wdt_ping,
+};
+
+static const struct watchdog_info pic32_wdt_ident = {
+	.options = WDIOF_KEEPALIVEPING |
+			WDIOF_MAGICCLOSE | WDIOF_CARDRESET,
+	.identity = "PIC32 Watchdog",
+};
+
+static struct watchdog_device pic32_wdd = {
+	.info		= &pic32_wdt_ident,
+	.ops		= &pic32_wdt_fops,
+};
+
+static const struct of_device_id pic32_wdt_dt_ids[] = {
+	{ .compatible = "microchip,pic32mzda-wdt", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, pic32_wdt_dt_ids);
+
+static void pic32_clk_disable_unprepare(void *data)
+{
+	clk_disable_unprepare(data);
+}
+
+static int pic32_wdt_drv_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	int ret;
+	struct watchdog_device *wdd = &pic32_wdd;
+	struct pic32_wdt *wdt;
+
+	wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);
+	if (!wdt)
+		return -ENOMEM;
+
+	wdt->regs = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(wdt->regs))
+		return PTR_ERR(wdt->regs);
+
+	wdt->rst_base = devm_ioremap(dev, PIC32_BASE_RESET, 0x10);
+	if (!wdt->rst_base)
+		return -ENOMEM;
+
+	wdt->clk = devm_clk_get(dev, NULL);
+	if (IS_ERR(wdt->clk)) {
+		dev_err(dev, "clk not found\n");
+		return PTR_ERR(wdt->clk);
+	}
+
+	ret = clk_prepare_enable(wdt->clk);
+	if (ret) {
+		dev_err(dev, "clk enable failed\n");
+		return ret;
+	}
+	ret = devm_add_action_or_reset(dev, pic32_clk_disable_unprepare,
+				       wdt->clk);
+	if (ret)
+		return ret;
+
+	if (pic32_wdt_is_win_enabled(wdt)) {
+		dev_err(dev, "windowed-clear mode is not supported.\n");
+		return -ENODEV;
+	}
+
+	wdd->timeout = pic32_wdt_get_timeout_secs(wdt, dev);
+	if (!wdd->timeout) {
+		dev_err(dev, "failed to read watchdog register timeout\n");
+		return -EINVAL;
+	}
+
+	dev_info(dev, "timeout %d\n", wdd->timeout);
+
+	wdd->bootstatus = pic32_wdt_bootstatus(wdt) ? WDIOF_CARDRESET : 0;
+
+	watchdog_set_nowayout(wdd, WATCHDOG_NOWAYOUT);
+	watchdog_set_drvdata(wdd, wdt);
+
+	ret = devm_watchdog_register_device(dev, wdd);
+	if (ret)
+		return ret;
+
+	platform_set_drvdata(pdev, wdd);
+
+	return 0;
+}
+
+static struct platform_driver pic32_wdt_driver = {
+	.probe		= pic32_wdt_drv_probe,
+	.driver		= {
+		.name		= "pic32-wdt",
+		.of_match_table = of_match_ptr(pic32_wdt_dt_ids),
+	}
+};
+
+module_platform_driver(pic32_wdt_driver);
+
+MODULE_AUTHOR("Joshua Henderson <joshua.henderson@microchip.com>");
+MODULE_DESCRIPTION("Microchip PIC32 Watchdog Timer");
+MODULE_LICENSE("GPL");