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, 302 insertions, 0 deletions

diff --git a/drivers/hwmon/sht4x.c b/drivers/hwmon/sht4x.c
new file mode 100644
index 000000000..13e042927
--- /dev/null
+++ b/drivers/hwmon/sht4x.c
@@ -0,0 +1,302 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+/*
+ * Copyright (c) Linumiz 2021
+ *
+ * sht4x.c - Linux hwmon driver for SHT4x Temperature and Humidity sensor
+ *
+ * Author: Navin Sankar Velliangiri <navin@linumiz.com>
+ */
+
+#include <linux/crc8.h>
+#include <linux/delay.h>
+#include <linux/hwmon.h>
+#include <linux/i2c.h>
+#include <linux/jiffies.h>
+#include <linux/module.h>
+
+/*
+ * Poll intervals (in milliseconds)
+ */
+#define SHT4X_MIN_POLL_INTERVAL	2000
+
+/*
+ * I2C command delays (in microseconds)
+ */
+#define SHT4X_MEAS_DELAY_HPM	8200	/* see t_MEAS,h in datasheet */
+#define SHT4X_DELAY_EXTRA	10000
+
+/*
+ * Command Bytes
+ */
+#define SHT4X_CMD_MEASURE_HPM	0b11111101
+#define SHT4X_CMD_RESET		0b10010100
+
+#define SHT4X_CMD_LEN		1
+#define SHT4X_CRC8_LEN		1
+#define SHT4X_WORD_LEN		2
+#define SHT4X_RESPONSE_LENGTH	6
+#define SHT4X_CRC8_POLYNOMIAL	0x31
+#define SHT4X_CRC8_INIT		0xff
+#define SHT4X_MIN_TEMPERATURE	-45000
+#define SHT4X_MAX_TEMPERATURE	125000
+#define SHT4X_MIN_HUMIDITY	0
+#define SHT4X_MAX_HUMIDITY	100000
+
+DECLARE_CRC8_TABLE(sht4x_crc8_table);
+
+/**
+ * struct sht4x_data - All the data required to operate an SHT4X chip
+ * @client: the i2c client associated with the SHT4X
+ * @lock: a mutex that is used to prevent parallel access to the i2c client
+ * @update_interval: the minimum poll interval
+ * @last_updated: the previous time that the SHT4X was polled
+ * @temperature: the latest temperature value received from the SHT4X
+ * @humidity: the latest humidity value received from the SHT4X
+ */
+struct sht4x_data {
+	struct i2c_client	*client;
+	struct mutex		lock;	/* atomic read data updates */
+	bool			valid;	/* validity of fields below */
+	long			update_interval;	/* in milli-seconds */
+	long			last_updated;	/* in jiffies */
+	s32			temperature;
+	s32			humidity;
+};
+
+/**
+ * sht4x_read_values() - read and parse the raw data from the SHT4X
+ * @sht4x_data: the struct sht4x_data to use for the lock
+ * Return: 0 if successful, -ERRNO if not
+ */
+static int sht4x_read_values(struct sht4x_data *data)
+{
+	int ret = 0;
+	u16 t_ticks, rh_ticks;
+	unsigned long next_update;
+	struct i2c_client *client = data->client;
+	u8 crc;
+	u8 cmd[SHT4X_CMD_LEN] = {SHT4X_CMD_MEASURE_HPM};
+	u8 raw_data[SHT4X_RESPONSE_LENGTH];
+
+	mutex_lock(&data->lock);
+	next_update = data->last_updated +
+		      msecs_to_jiffies(data->update_interval);
+
+	if (data->valid && time_before_eq(jiffies, next_update))
+		goto unlock;
+
+	ret = i2c_master_send(client, cmd, SHT4X_CMD_LEN);
+	if (ret < 0)
+		goto unlock;
+
+	usleep_range(SHT4X_MEAS_DELAY_HPM, SHT4X_MEAS_DELAY_HPM + SHT4X_DELAY_EXTRA);
+
+	ret = i2c_master_recv(client, raw_data, SHT4X_RESPONSE_LENGTH);
+	if (ret != SHT4X_RESPONSE_LENGTH) {
+		if (ret >= 0)
+			ret = -ENODATA;
+		goto unlock;
+	}
+
+	t_ticks = raw_data[0] << 8 | raw_data[1];
+	rh_ticks = raw_data[3] << 8 | raw_data[4];
+
+	crc = crc8(sht4x_crc8_table, &raw_data[0], SHT4X_WORD_LEN, CRC8_INIT_VALUE);
+	if (crc != raw_data[2]) {
+		dev_err(&client->dev, "data integrity check failed\n");
+		ret = -EIO;
+		goto unlock;
+	}
+
+	crc = crc8(sht4x_crc8_table, &raw_data[3], SHT4X_WORD_LEN, CRC8_INIT_VALUE);
+	if (crc != raw_data[5]) {
+		dev_err(&client->dev, "data integrity check failed\n");
+		ret = -EIO;
+		goto unlock;
+	}
+
+	data->temperature = ((21875 * (int32_t)t_ticks) >> 13) - 45000;
+	data->humidity = ((15625 * (int32_t)rh_ticks) >> 13) - 6000;
+	data->last_updated = jiffies;
+	data->valid = true;
+	ret = 0;
+
+unlock:
+	mutex_unlock(&data->lock);
+	return ret;
+}
+
+static ssize_t sht4x_interval_write(struct sht4x_data *data, long val)
+{
+	data->update_interval = clamp_val(val, SHT4X_MIN_POLL_INTERVAL, INT_MAX);
+
+	return 0;
+}
+
+/* sht4x_interval_read() - read the minimum poll interval in milliseconds */
+static size_t sht4x_interval_read(struct sht4x_data *data, long *val)
+{
+	*val = data->update_interval;
+	return 0;
+}
+
+/* sht4x_temperature1_read() - read the temperature in millidegrees */
+static int sht4x_temperature1_read(struct sht4x_data *data, long *val)
+{
+	int ret;
+
+	ret = sht4x_read_values(data);
+	if (ret < 0)
+		return ret;
+
+	*val = data->temperature;
+
+	return 0;
+}
+
+/* sht4x_humidity1_read() - read a relative humidity in millipercent */
+static int sht4x_humidity1_read(struct sht4x_data *data, long *val)
+{
+	int ret;
+
+	ret = sht4x_read_values(data);
+	if (ret < 0)
+		return ret;
+
+	*val = data->humidity;
+
+	return 0;
+}
+
+static umode_t sht4x_hwmon_visible(const void *data,
+				   enum hwmon_sensor_types type,
+				   u32 attr, int channel)
+{
+	switch (type) {
+	case hwmon_temp:
+	case hwmon_humidity:
+		return 0444;
+	case hwmon_chip:
+		return 0644;
+	default:
+		return 0;
+	}
+}
+
+static int sht4x_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
+			    u32 attr, int channel, long *val)
+{
+	struct sht4x_data *data = dev_get_drvdata(dev);
+
+	switch (type) {
+	case hwmon_temp:
+		return sht4x_temperature1_read(data, val);
+	case hwmon_humidity:
+		return sht4x_humidity1_read(data, val);
+	case hwmon_chip:
+		return sht4x_interval_read(data, val);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static int sht4x_hwmon_write(struct device *dev, enum hwmon_sensor_types type,
+			     u32 attr, int channel, long val)
+{
+	struct sht4x_data *data = dev_get_drvdata(dev);
+
+	switch (type) {
+	case hwmon_chip:
+		return sht4x_interval_write(data, val);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static const struct hwmon_channel_info *sht4x_info[] = {
+	HWMON_CHANNEL_INFO(chip, HWMON_C_UPDATE_INTERVAL),
+	HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT),
+	HWMON_CHANNEL_INFO(humidity, HWMON_H_INPUT),
+	NULL,
+};
+
+static const struct hwmon_ops sht4x_hwmon_ops = {
+	.is_visible = sht4x_hwmon_visible,
+	.read = sht4x_hwmon_read,
+	.write = sht4x_hwmon_write,
+};
+
+static const struct hwmon_chip_info sht4x_chip_info = {
+	.ops = &sht4x_hwmon_ops,
+	.info = sht4x_info,
+};
+
+static int sht4x_probe(struct i2c_client *client)
+{
+	struct device *device = &client->dev;
+	struct device *hwmon_dev;
+	struct sht4x_data *data;
+	u8 cmd[] = {SHT4X_CMD_RESET};
+	int ret;
+
+	/*
+	 * we require full i2c support since the sht4x uses multi-byte read and
+	 * writes as well as multi-byte commands which are not supported by
+	 * the smbus protocol
+	 */
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
+		return -EOPNOTSUPP;
+
+	data = devm_kzalloc(device, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	data->update_interval = SHT4X_MIN_POLL_INTERVAL;
+	data->client = client;
+
+	mutex_init(&data->lock);
+
+	crc8_populate_msb(sht4x_crc8_table, SHT4X_CRC8_POLYNOMIAL);
+
+	ret = i2c_master_send(client, cmd, SHT4X_CMD_LEN);
+	if (ret < 0)
+		return ret;
+	if (ret != SHT4X_CMD_LEN)
+		return -EIO;
+
+	hwmon_dev = devm_hwmon_device_register_with_info(device,
+							 client->name,
+							 data,
+							 &sht4x_chip_info,
+							 NULL);
+
+	return PTR_ERR_OR_ZERO(hwmon_dev);
+}
+
+static const struct i2c_device_id sht4x_id[] = {
+	{ "sht4x", 0 },
+	{ },
+};
+MODULE_DEVICE_TABLE(i2c, sht4x_id);
+
+static const struct of_device_id sht4x_of_match[] = {
+	{ .compatible = "sensirion,sht4x" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, sht4x_of_match);
+
+static struct i2c_driver sht4x_driver = {
+	.driver = {
+		.name = "sht4x",
+		.of_match_table = sht4x_of_match,
+	},
+	.probe_new	= sht4x_probe,
+	.id_table	= sht4x_id,
+};
+
+module_i2c_driver(sht4x_driver);
+
+MODULE_AUTHOR("Navin Sankar Velliangiri <navin@linumiz.com>");
+MODULE_DESCRIPTION("Sensirion SHT4x humidity and temperature sensor driver");
+MODULE_LICENSE("GPL v2");