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, 285 insertions, 0 deletions

diff --git a/drivers/soc/samsung/exynos-usi.c b/drivers/soc/samsung/exynos-usi.c
new file mode 100644
index 000000000..114352695
--- /dev/null
+++ b/drivers/soc/samsung/exynos-usi.c
@@ -0,0 +1,285 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2021 Linaro Ltd.
+ * Author: Sam Protsenko <semen.protsenko@linaro.org>
+ *
+ * Samsung Exynos USI driver (Universal Serial Interface).
+ */
+
+#include <linux/clk.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <dt-bindings/soc/samsung,exynos-usi.h>
+
+/* USIv2: System Register: SW_CONF register bits */
+#define USI_V2_SW_CONF_NONE	0x0
+#define USI_V2_SW_CONF_UART	BIT(0)
+#define USI_V2_SW_CONF_SPI	BIT(1)
+#define USI_V2_SW_CONF_I2C	BIT(2)
+#define USI_V2_SW_CONF_MASK	(USI_V2_SW_CONF_UART | USI_V2_SW_CONF_SPI | \
+				 USI_V2_SW_CONF_I2C)
+
+/* USIv2: USI register offsets */
+#define USI_CON			0x04
+#define USI_OPTION		0x08
+
+/* USIv2: USI register bits */
+#define USI_CON_RESET		BIT(0)
+#define USI_OPTION_CLKREQ_ON	BIT(1)
+#define USI_OPTION_CLKSTOP_ON	BIT(2)
+
+enum exynos_usi_ver {
+	USI_VER2 = 2,
+};
+
+struct exynos_usi_variant {
+	enum exynos_usi_ver ver;	/* USI IP-core version */
+	unsigned int sw_conf_mask;	/* SW_CONF mask for all protocols */
+	size_t min_mode;		/* first index in exynos_usi_modes[] */
+	size_t max_mode;		/* last index in exynos_usi_modes[] */
+	size_t num_clks;		/* number of clocks to assert */
+	const char * const *clk_names;	/* clock names to assert */
+};
+
+struct exynos_usi {
+	struct device *dev;
+	void __iomem *regs;		/* USI register map */
+	struct clk_bulk_data *clks;	/* USI clocks */
+
+	size_t mode;			/* current USI SW_CONF mode index */
+	bool clkreq_on;			/* always provide clock to IP */
+
+	/* System Register */
+	struct regmap *sysreg;		/* System Register map */
+	unsigned int sw_conf;		/* SW_CONF register offset in sysreg */
+
+	const struct exynos_usi_variant *data;
+};
+
+struct exynos_usi_mode {
+	const char *name;		/* mode name */
+	unsigned int val;		/* mode register value */
+};
+
+static const struct exynos_usi_mode exynos_usi_modes[] = {
+	[USI_V2_NONE] =	{ .name = "none", .val = USI_V2_SW_CONF_NONE },
+	[USI_V2_UART] =	{ .name = "uart", .val = USI_V2_SW_CONF_UART },
+	[USI_V2_SPI] =	{ .name = "spi",  .val = USI_V2_SW_CONF_SPI },
+	[USI_V2_I2C] =	{ .name = "i2c",  .val = USI_V2_SW_CONF_I2C },
+};
+
+static const char * const exynos850_usi_clk_names[] = { "pclk", "ipclk" };
+static const struct exynos_usi_variant exynos850_usi_data = {
+	.ver		= USI_VER2,
+	.sw_conf_mask	= USI_V2_SW_CONF_MASK,
+	.min_mode	= USI_V2_NONE,
+	.max_mode	= USI_V2_I2C,
+	.num_clks	= ARRAY_SIZE(exynos850_usi_clk_names),
+	.clk_names	= exynos850_usi_clk_names,
+};
+
+static const struct of_device_id exynos_usi_dt_match[] = {
+	{
+		.compatible = "samsung,exynos850-usi",
+		.data = &exynos850_usi_data,
+	},
+	{ } /* sentinel */
+};
+MODULE_DEVICE_TABLE(of, exynos_usi_dt_match);
+
+/**
+ * exynos_usi_set_sw_conf - Set USI block configuration mode
+ * @usi: USI driver object
+ * @mode: Mode index
+ *
+ * Select underlying serial protocol (UART/SPI/I2C) in USI IP-core.
+ *
+ * Return: 0 on success, or negative error code on failure.
+ */
+static int exynos_usi_set_sw_conf(struct exynos_usi *usi, size_t mode)
+{
+	unsigned int val;
+	int ret;
+
+	if (mode < usi->data->min_mode || mode > usi->data->max_mode)
+		return -EINVAL;
+
+	val = exynos_usi_modes[mode].val;
+	ret = regmap_update_bits(usi->sysreg, usi->sw_conf,
+				 usi->data->sw_conf_mask, val);
+	if (ret)
+		return ret;
+
+	usi->mode = mode;
+	dev_dbg(usi->dev, "protocol: %s\n", exynos_usi_modes[usi->mode].name);
+
+	return 0;
+}
+
+/**
+ * exynos_usi_enable - Initialize USI block
+ * @usi: USI driver object
+ *
+ * USI IP-core start state is "reset" (on startup and after CPU resume). This
+ * routine enables the USI block by clearing the reset flag. It also configures
+ * HWACG behavior (needed e.g. for UART Rx). It should be performed before
+ * underlying protocol becomes functional.
+ *
+ * Return: 0 on success, or negative error code on failure.
+ */
+static int exynos_usi_enable(const struct exynos_usi *usi)
+{
+	u32 val;
+	int ret;
+
+	ret = clk_bulk_prepare_enable(usi->data->num_clks, usi->clks);
+	if (ret)
+		return ret;
+
+	/* Enable USI block */
+	val = readl(usi->regs + USI_CON);
+	val &= ~USI_CON_RESET;
+	writel(val, usi->regs + USI_CON);
+	udelay(1);
+
+	/* Continuously provide the clock to USI IP w/o gating */
+	if (usi->clkreq_on) {
+		val = readl(usi->regs + USI_OPTION);
+		val &= ~USI_OPTION_CLKSTOP_ON;
+		val |= USI_OPTION_CLKREQ_ON;
+		writel(val, usi->regs + USI_OPTION);
+	}
+
+	clk_bulk_disable_unprepare(usi->data->num_clks, usi->clks);
+
+	return ret;
+}
+
+static int exynos_usi_configure(struct exynos_usi *usi)
+{
+	int ret;
+
+	ret = exynos_usi_set_sw_conf(usi, usi->mode);
+	if (ret)
+		return ret;
+
+	if (usi->data->ver == USI_VER2)
+		return exynos_usi_enable(usi);
+
+	return 0;
+}
+
+static int exynos_usi_parse_dt(struct device_node *np, struct exynos_usi *usi)
+{
+	int ret;
+	u32 mode;
+
+	ret = of_property_read_u32(np, "samsung,mode", &mode);
+	if (ret)
+		return ret;
+	if (mode < usi->data->min_mode || mode > usi->data->max_mode)
+		return -EINVAL;
+	usi->mode = mode;
+
+	usi->sysreg = syscon_regmap_lookup_by_phandle(np, "samsung,sysreg");
+	if (IS_ERR(usi->sysreg))
+		return PTR_ERR(usi->sysreg);
+
+	ret = of_property_read_u32_index(np, "samsung,sysreg", 1,
+					 &usi->sw_conf);
+	if (ret)
+		return ret;
+
+	usi->clkreq_on = of_property_read_bool(np, "samsung,clkreq-on");
+
+	return 0;
+}
+
+static int exynos_usi_get_clocks(struct exynos_usi *usi)
+{
+	const size_t num = usi->data->num_clks;
+	struct device *dev = usi->dev;
+	size_t i;
+
+	if (num == 0)
+		return 0;
+
+	usi->clks = devm_kcalloc(dev, num, sizeof(*usi->clks), GFP_KERNEL);
+	if (!usi->clks)
+		return -ENOMEM;
+
+	for (i = 0; i < num; ++i)
+		usi->clks[i].id = usi->data->clk_names[i];
+
+	return devm_clk_bulk_get(dev, num, usi->clks);
+}
+
+static int exynos_usi_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct exynos_usi *usi;
+	int ret;
+
+	usi = devm_kzalloc(dev, sizeof(*usi), GFP_KERNEL);
+	if (!usi)
+		return -ENOMEM;
+
+	usi->dev = dev;
+	platform_set_drvdata(pdev, usi);
+
+	usi->data = of_device_get_match_data(dev);
+	if (!usi->data)
+		return -EINVAL;
+
+	ret = exynos_usi_parse_dt(np, usi);
+	if (ret)
+		return ret;
+
+	ret = exynos_usi_get_clocks(usi);
+	if (ret)
+		return ret;
+
+	if (usi->data->ver == USI_VER2) {
+		usi->regs = devm_platform_ioremap_resource(pdev, 0);
+		if (IS_ERR(usi->regs))
+			return PTR_ERR(usi->regs);
+	}
+
+	ret = exynos_usi_configure(usi);
+	if (ret)
+		return ret;
+
+	/* Make it possible to embed protocol nodes into USI np */
+	return of_platform_populate(np, NULL, NULL, dev);
+}
+
+static int __maybe_unused exynos_usi_resume_noirq(struct device *dev)
+{
+	struct exynos_usi *usi = dev_get_drvdata(dev);
+
+	return exynos_usi_configure(usi);
+}
+
+static const struct dev_pm_ops exynos_usi_pm = {
+	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(NULL, exynos_usi_resume_noirq)
+};
+
+static struct platform_driver exynos_usi_driver = {
+	.driver = {
+		.name		= "exynos-usi",
+		.pm		= &exynos_usi_pm,
+		.of_match_table	= exynos_usi_dt_match,
+	},
+	.probe = exynos_usi_probe,
+};
+module_platform_driver(exynos_usi_driver);
+
+MODULE_DESCRIPTION("Samsung USI driver");
+MODULE_AUTHOR("Sam Protsenko <semen.protsenko@linaro.org>");
+MODULE_LICENSE("GPL");