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, 351 insertions, 0 deletions

diff --git a/drivers/hwmon/max127.c b/drivers/hwmon/max127.c
new file mode 100644
index 000000000..0e21e7e6b
--- /dev/null
+++ b/drivers/hwmon/max127.c
@@ -0,0 +1,351 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Hardware monitoring driver for MAX127.
+ *
+ * Copyright (c) 2020 Facebook Inc.
+ */
+
+#include <linux/err.h>
+#include <linux/hwmon.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+/*
+ * MAX127 Control Byte. Refer to MAX127 datasheet, Table 1 "Control-Byte
+ * Format" for details.
+ */
+#define MAX127_CTRL_START	BIT(7)
+#define MAX127_CTRL_SEL_SHIFT	4
+#define MAX127_CTRL_RNG		BIT(3)
+#define MAX127_CTRL_BIP		BIT(2)
+#define MAX127_CTRL_PD1		BIT(1)
+#define MAX127_CTRL_PD0		BIT(0)
+
+#define MAX127_NUM_CHANNELS	8
+#define MAX127_SET_CHANNEL(ch)	(((ch) & 7) << MAX127_CTRL_SEL_SHIFT)
+
+/*
+ * MAX127 channel input ranges. Refer to MAX127 datasheet, Table 3 "Range
+ * and Polarity Selection" for details.
+ */
+#define MAX127_FULL_RANGE	10000	/* 10V */
+#define MAX127_HALF_RANGE	5000	/* 5V */
+
+/*
+ * MAX127 returns 2 bytes at read:
+ *   - the first byte contains data[11:4].
+ *   - the second byte contains data[3:0] (MSB) and 4 dummy 0s (LSB).
+ * Refer to MAX127 datasheet, "Read a Conversion (Read Cycle)" section
+ * for details.
+ */
+#define MAX127_DATA_LEN		2
+#define MAX127_DATA_SHIFT	4
+
+#define MAX127_SIGN_BIT		BIT(11)
+
+struct max127_data {
+	struct mutex lock;
+	struct i2c_client *client;
+	u8 ctrl_byte[MAX127_NUM_CHANNELS];
+};
+
+static int max127_select_channel(struct i2c_client *client, u8 ctrl_byte)
+{
+	int status;
+	struct i2c_msg msg = {
+		.addr = client->addr,
+		.flags = 0,
+		.len = sizeof(ctrl_byte),
+		.buf = &ctrl_byte,
+	};
+
+	status = i2c_transfer(client->adapter, &msg, 1);
+	if (status < 0)
+		return status;
+	if (status != 1)
+		return -EIO;
+
+	return 0;
+}
+
+static int max127_read_channel(struct i2c_client *client, long *val)
+{
+	int status;
+	u8 i2c_data[MAX127_DATA_LEN];
+	struct i2c_msg msg = {
+		.addr = client->addr,
+		.flags = I2C_M_RD,
+		.len = sizeof(i2c_data),
+		.buf = i2c_data,
+	};
+
+	status = i2c_transfer(client->adapter, &msg, 1);
+	if (status < 0)
+		return status;
+	if (status != 1)
+		return -EIO;
+
+	*val = (i2c_data[1] >> MAX127_DATA_SHIFT) |
+		((u16)i2c_data[0] << MAX127_DATA_SHIFT);
+	return 0;
+}
+
+static long max127_process_raw(u8 ctrl_byte, long raw)
+{
+	long scale, weight;
+
+	/*
+	 * MAX127's data coding is binary in unipolar mode with 1 LSB =
+	 * (Full-Scale/4096) and two’s complement binary in bipolar mode
+	 * with 1 LSB = [(2 x |FS|)/4096].
+	 * Refer to MAX127 datasheet, "Transfer Function" section for
+	 * details.
+	 */
+	scale = (ctrl_byte & MAX127_CTRL_RNG) ? MAX127_FULL_RANGE :
+						MAX127_HALF_RANGE;
+	if (ctrl_byte & MAX127_CTRL_BIP) {
+		weight = (raw & MAX127_SIGN_BIT);
+		raw &= ~MAX127_SIGN_BIT;
+		raw -= weight;
+		raw *= 2;
+	}
+
+	return raw * scale / 4096;
+}
+
+static int max127_read_input(struct max127_data *data, int channel, long *val)
+{
+	long raw;
+	int status;
+	struct i2c_client *client = data->client;
+	u8 ctrl_byte = data->ctrl_byte[channel];
+
+	mutex_lock(&data->lock);
+
+	status = max127_select_channel(client, ctrl_byte);
+	if (status)
+		goto exit;
+
+	status = max127_read_channel(client, &raw);
+	if (status)
+		goto exit;
+
+	*val = max127_process_raw(ctrl_byte, raw);
+
+exit:
+	mutex_unlock(&data->lock);
+	return status;
+}
+
+static int max127_read_min(struct max127_data *data, int channel, long *val)
+{
+	u8 rng_bip = (data->ctrl_byte[channel] >> 2) & 3;
+	static const int min_input_map[4] = {
+		0,			/* RNG=0, BIP=0 */
+		-MAX127_HALF_RANGE,	/* RNG=0, BIP=1 */
+		0,			/* RNG=1, BIP=0 */
+		-MAX127_FULL_RANGE,	/* RNG=1, BIP=1 */
+	};
+
+	*val = min_input_map[rng_bip];
+	return 0;
+}
+
+static int max127_read_max(struct max127_data *data, int channel, long *val)
+{
+	u8 rng_bip = (data->ctrl_byte[channel] >> 2) & 3;
+	static const int max_input_map[4] = {
+		MAX127_HALF_RANGE,	/* RNG=0, BIP=0 */
+		MAX127_HALF_RANGE,	/* RNG=0, BIP=1 */
+		MAX127_FULL_RANGE,	/* RNG=1, BIP=0 */
+		MAX127_FULL_RANGE,	/* RNG=1, BIP=1 */
+	};
+
+	*val = max_input_map[rng_bip];
+	return 0;
+}
+
+static int max127_write_min(struct max127_data *data, int channel, long val)
+{
+	u8 ctrl;
+
+	mutex_lock(&data->lock);
+
+	ctrl = data->ctrl_byte[channel];
+	if (val <= -MAX127_FULL_RANGE) {
+		ctrl |= (MAX127_CTRL_RNG | MAX127_CTRL_BIP);
+	} else if (val < 0) {
+		ctrl |= MAX127_CTRL_BIP;
+		ctrl &= ~MAX127_CTRL_RNG;
+	} else {
+		ctrl &= ~MAX127_CTRL_BIP;
+	}
+	data->ctrl_byte[channel] = ctrl;
+
+	mutex_unlock(&data->lock);
+
+	return 0;
+}
+
+static int max127_write_max(struct max127_data *data, int channel, long val)
+{
+	mutex_lock(&data->lock);
+
+	if (val >= MAX127_FULL_RANGE)
+		data->ctrl_byte[channel] |= MAX127_CTRL_RNG;
+	else
+		data->ctrl_byte[channel] &= ~MAX127_CTRL_RNG;
+
+	mutex_unlock(&data->lock);
+
+	return 0;
+}
+
+static umode_t max127_is_visible(const void *_data,
+				 enum hwmon_sensor_types type,
+				 u32 attr, int channel)
+{
+	if (type == hwmon_in) {
+		switch (attr) {
+		case hwmon_in_input:
+			return 0444;
+
+		case hwmon_in_min:
+		case hwmon_in_max:
+			return 0644;
+
+		default:
+			break;
+		}
+	}
+
+	return 0;
+}
+
+static int max127_read(struct device *dev, enum hwmon_sensor_types type,
+			u32 attr, int channel, long *val)
+{
+	int status;
+	struct max127_data *data = dev_get_drvdata(dev);
+
+	if (type != hwmon_in)
+		return -EOPNOTSUPP;
+
+	switch (attr) {
+	case hwmon_in_input:
+		status = max127_read_input(data, channel, val);
+		break;
+
+	case hwmon_in_min:
+		status = max127_read_min(data, channel, val);
+		break;
+
+	case hwmon_in_max:
+		status = max127_read_max(data, channel, val);
+		break;
+
+	default:
+		status = -EOPNOTSUPP;
+		break;
+	}
+
+	return status;
+}
+
+static int max127_write(struct device *dev, enum hwmon_sensor_types type,
+			u32 attr, int channel, long val)
+{
+	int status;
+	struct max127_data *data = dev_get_drvdata(dev);
+
+	if (type != hwmon_in)
+		return -EOPNOTSUPP;
+
+	switch (attr) {
+	case hwmon_in_min:
+		status = max127_write_min(data, channel, val);
+		break;
+
+	case hwmon_in_max:
+		status = max127_write_max(data, channel, val);
+		break;
+
+	default:
+		status = -EOPNOTSUPP;
+		break;
+	}
+
+	return status;
+}
+
+static const struct hwmon_ops max127_hwmon_ops = {
+	.is_visible = max127_is_visible,
+	.read = max127_read,
+	.write = max127_write,
+};
+
+static const struct hwmon_channel_info *max127_info[] = {
+	HWMON_CHANNEL_INFO(in,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX),
+	NULL,
+};
+
+static const struct hwmon_chip_info max127_chip_info = {
+	.ops = &max127_hwmon_ops,
+	.info = max127_info,
+};
+
+static int max127_probe(struct i2c_client *client)
+{
+	int i;
+	struct device *hwmon_dev;
+	struct max127_data *data;
+	struct device *dev = &client->dev;
+
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	data->client = client;
+	mutex_init(&data->lock);
+	for (i = 0; i < ARRAY_SIZE(data->ctrl_byte); i++)
+		data->ctrl_byte[i] = (MAX127_CTRL_START |
+				      MAX127_SET_CHANNEL(i));
+
+	hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,
+							 data,
+							 &max127_chip_info,
+							 NULL);
+
+	return PTR_ERR_OR_ZERO(hwmon_dev);
+}
+
+static const struct i2c_device_id max127_id[] = {
+	{ "max127", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, max127_id);
+
+static struct i2c_driver max127_driver = {
+	.class		= I2C_CLASS_HWMON,
+	.driver = {
+		.name	= "max127",
+	},
+	.probe_new	= max127_probe,
+	.id_table	= max127_id,
+};
+
+module_i2c_driver(max127_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mike Choi <mikechoi@fb.com>");
+MODULE_AUTHOR("Tao Ren <rentao.bupt@gmail.com>");
+MODULE_DESCRIPTION("MAX127 Hardware Monitoring driver");