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, 247 insertions, 0 deletions

diff --git a/drivers/iio/dac/ltc1660.c b/drivers/iio/dac/ltc1660.c
new file mode 100644
index 000000000..2758fc8a5
--- /dev/null
+++ b/drivers/iio/dac/ltc1660.c
@@ -0,0 +1,247 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for Linear Technology LTC1665/LTC1660, 8 channels DAC
+ *
+ * Copyright (C) 2018 Marcus Folkesson <marcus.folkesson@gmail.com>
+ */
+#include <linux/bitops.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+
+#define LTC1660_REG_WAKE	0x0
+#define LTC1660_REG_DAC_A	0x1
+#define LTC1660_REG_DAC_B	0x2
+#define LTC1660_REG_DAC_C	0x3
+#define LTC1660_REG_DAC_D	0x4
+#define LTC1660_REG_DAC_E	0x5
+#define LTC1660_REG_DAC_F	0x6
+#define LTC1660_REG_DAC_G	0x7
+#define LTC1660_REG_DAC_H	0x8
+#define LTC1660_REG_SLEEP	0xe
+
+#define LTC1660_NUM_CHANNELS	8
+
+static const struct regmap_config ltc1660_regmap_config = {
+	.reg_bits = 4,
+	.val_bits = 12,
+};
+
+enum ltc1660_supported_device_ids {
+	ID_LTC1660,
+	ID_LTC1665,
+};
+
+struct ltc1660_priv {
+	struct spi_device *spi;
+	struct regmap *regmap;
+	struct regulator *vref_reg;
+	unsigned int value[LTC1660_NUM_CHANNELS];
+	unsigned int vref_mv;
+};
+
+static int ltc1660_read_raw(struct iio_dev *indio_dev,
+		struct iio_chan_spec const *chan,
+		int *val,
+		int *val2,
+		long mask)
+{
+	struct ltc1660_priv *priv = iio_priv(indio_dev);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		*val = priv->value[chan->channel];
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		*val = regulator_get_voltage(priv->vref_reg);
+		if (*val < 0) {
+			dev_err(&priv->spi->dev, "failed to read vref regulator: %d\n",
+					*val);
+			return *val;
+		}
+
+		/* Convert to mV */
+		*val /= 1000;
+		*val2 = chan->scan_type.realbits;
+		return IIO_VAL_FRACTIONAL_LOG2;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int ltc1660_write_raw(struct iio_dev *indio_dev,
+		struct iio_chan_spec const *chan,
+		int val,
+		int val2,
+		long mask)
+{
+	struct ltc1660_priv *priv = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		if (val2 != 0)
+			return -EINVAL;
+
+		if (val < 0 || val > GENMASK(chan->scan_type.realbits - 1, 0))
+			return -EINVAL;
+
+		ret = regmap_write(priv->regmap, chan->channel,
+					(val << chan->scan_type.shift));
+		if (!ret)
+			priv->value[chan->channel] = val;
+
+		return ret;
+	default:
+		return -EINVAL;
+	}
+}
+
+#define LTC1660_CHAN(chan, bits) {			\
+	.type = IIO_VOLTAGE,				\
+	.indexed = 1,					\
+	.output = 1,					\
+	.channel = chan,				\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),	\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),	\
+	.scan_type = {					\
+		.sign = 'u',				\
+		.realbits = (bits),			\
+		.storagebits = 16,			\
+		.shift = 12 - (bits),			\
+	},						\
+}
+
+#define  LTC1660_OCTAL_CHANNELS(bits) {			\
+		LTC1660_CHAN(LTC1660_REG_DAC_A, bits),	\
+		LTC1660_CHAN(LTC1660_REG_DAC_B, bits),	\
+		LTC1660_CHAN(LTC1660_REG_DAC_C, bits),	\
+		LTC1660_CHAN(LTC1660_REG_DAC_D, bits),	\
+		LTC1660_CHAN(LTC1660_REG_DAC_E, bits),	\
+		LTC1660_CHAN(LTC1660_REG_DAC_F, bits),	\
+		LTC1660_CHAN(LTC1660_REG_DAC_G, bits),	\
+		LTC1660_CHAN(LTC1660_REG_DAC_H, bits),	\
+}
+
+static const struct iio_chan_spec ltc1660_channels[][LTC1660_NUM_CHANNELS] = {
+	[ID_LTC1660] = LTC1660_OCTAL_CHANNELS(10),
+	[ID_LTC1665] = LTC1660_OCTAL_CHANNELS(8),
+};
+
+static const struct iio_info ltc1660_info = {
+	.read_raw = &ltc1660_read_raw,
+	.write_raw = &ltc1660_write_raw,
+};
+
+static int ltc1660_suspend(struct device *dev)
+{
+	struct ltc1660_priv *priv = iio_priv(spi_get_drvdata(
+						to_spi_device(dev)));
+	return regmap_write(priv->regmap, LTC1660_REG_SLEEP, 0x00);
+}
+
+static int ltc1660_resume(struct device *dev)
+{
+	struct ltc1660_priv *priv = iio_priv(spi_get_drvdata(
+						to_spi_device(dev)));
+	return regmap_write(priv->regmap, LTC1660_REG_WAKE, 0x00);
+}
+static DEFINE_SIMPLE_DEV_PM_OPS(ltc1660_pm_ops, ltc1660_suspend,
+				ltc1660_resume);
+
+static int ltc1660_probe(struct spi_device *spi)
+{
+	struct iio_dev *indio_dev;
+	struct ltc1660_priv *priv;
+	const struct spi_device_id *id = spi_get_device_id(spi);
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*priv));
+	if (indio_dev == NULL)
+		return -ENOMEM;
+
+	priv = iio_priv(indio_dev);
+	priv->regmap = devm_regmap_init_spi(spi, &ltc1660_regmap_config);
+	if (IS_ERR(priv->regmap)) {
+		dev_err(&spi->dev, "failed to register spi regmap %ld\n",
+			PTR_ERR(priv->regmap));
+		return PTR_ERR(priv->regmap);
+	}
+
+	priv->vref_reg = devm_regulator_get(&spi->dev, "vref");
+	if (IS_ERR(priv->vref_reg))
+		return dev_err_probe(&spi->dev, PTR_ERR(priv->vref_reg),
+				     "vref regulator not specified\n");
+
+	ret = regulator_enable(priv->vref_reg);
+	if (ret) {
+		dev_err(&spi->dev, "failed to enable vref regulator: %d\n",
+				ret);
+		return ret;
+	}
+
+	priv->spi = spi;
+	spi_set_drvdata(spi, indio_dev);
+	indio_dev->info = &ltc1660_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = ltc1660_channels[id->driver_data];
+	indio_dev->num_channels = LTC1660_NUM_CHANNELS;
+	indio_dev->name = id->name;
+
+	ret = iio_device_register(indio_dev);
+	if (ret) {
+		dev_err(&spi->dev, "failed to register iio device: %d\n",
+				ret);
+		goto error_disable_reg;
+	}
+
+	return 0;
+
+error_disable_reg:
+	regulator_disable(priv->vref_reg);
+
+	return ret;
+}
+
+static void ltc1660_remove(struct spi_device *spi)
+{
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+	struct ltc1660_priv *priv = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+	regulator_disable(priv->vref_reg);
+}
+
+static const struct of_device_id ltc1660_dt_ids[] = {
+	{ .compatible = "lltc,ltc1660", .data = (void *)ID_LTC1660 },
+	{ .compatible = "lltc,ltc1665", .data = (void *)ID_LTC1665 },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, ltc1660_dt_ids);
+
+static const struct spi_device_id ltc1660_id[] = {
+	{"ltc1660", ID_LTC1660},
+	{"ltc1665", ID_LTC1665},
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(spi, ltc1660_id);
+
+static struct spi_driver ltc1660_driver = {
+	.driver = {
+		.name = "ltc1660",
+		.of_match_table = ltc1660_dt_ids,
+		.pm = pm_sleep_ptr(&ltc1660_pm_ops),
+	},
+	.probe	= ltc1660_probe,
+	.remove = ltc1660_remove,
+	.id_table = ltc1660_id,
+};
+module_spi_driver(ltc1660_driver);
+
+MODULE_AUTHOR("Marcus Folkesson <marcus.folkesson@gmail.com>");
+MODULE_DESCRIPTION("Linear Technology LTC1660/LTC1665 DAC");
+MODULE_LICENSE("GPL v2");