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, 195 insertions, 0 deletions

diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_timestamp.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_timestamp.c
new file mode 100644
index 000000000..7f2dc41f8
--- /dev/null
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_timestamp.c
@@ -0,0 +1,195 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2020 Invensense, Inc.
+ */
+
+#include <linux/kernel.h>
+#include <linux/regmap.h>
+#include <linux/math64.h>
+
+#include "inv_icm42600.h"
+#include "inv_icm42600_timestamp.h"
+
+/* internal chip period is 32kHz, 31250ns */
+#define INV_ICM42600_TIMESTAMP_PERIOD		31250
+/* allow a jitter of +/- 2% */
+#define INV_ICM42600_TIMESTAMP_JITTER		2
+/* compute min and max periods accepted */
+#define INV_ICM42600_TIMESTAMP_MIN_PERIOD(_p)		\
+	(((_p) * (100 - INV_ICM42600_TIMESTAMP_JITTER)) / 100)
+#define INV_ICM42600_TIMESTAMP_MAX_PERIOD(_p)		\
+	(((_p) * (100 + INV_ICM42600_TIMESTAMP_JITTER)) / 100)
+
+/* Add a new value inside an accumulator and update the estimate value */
+static void inv_update_acc(struct inv_icm42600_timestamp_acc *acc, uint32_t val)
+{
+	uint64_t sum = 0;
+	size_t i;
+
+	acc->values[acc->idx++] = val;
+	if (acc->idx >= ARRAY_SIZE(acc->values))
+		acc->idx = 0;
+
+	/* compute the mean of all stored values, use 0 as empty slot */
+	for (i = 0; i < ARRAY_SIZE(acc->values); ++i) {
+		if (acc->values[i] == 0)
+			break;
+		sum += acc->values[i];
+	}
+
+	acc->val = div_u64(sum, i);
+}
+
+void inv_icm42600_timestamp_init(struct inv_icm42600_timestamp *ts,
+				 uint32_t period)
+{
+	/* initial odr for sensor after reset is 1kHz */
+	const uint32_t default_period = 1000000;
+
+	/* current multiplier and period values after reset */
+	ts->mult = default_period / INV_ICM42600_TIMESTAMP_PERIOD;
+	ts->period = default_period;
+	/* new set multiplier is the one from chip initialization */
+	ts->new_mult = period / INV_ICM42600_TIMESTAMP_PERIOD;
+
+	/* use theoretical value for chip period */
+	inv_update_acc(&ts->chip_period, INV_ICM42600_TIMESTAMP_PERIOD);
+}
+
+int inv_icm42600_timestamp_setup(struct inv_icm42600_state *st)
+{
+	unsigned int val;
+
+	/* enable timestamp register */
+	val = INV_ICM42600_TMST_CONFIG_TMST_TO_REGS_EN |
+	      INV_ICM42600_TMST_CONFIG_TMST_EN;
+	return regmap_update_bits(st->map, INV_ICM42600_REG_TMST_CONFIG,
+				  INV_ICM42600_TMST_CONFIG_MASK, val);
+}
+
+int inv_icm42600_timestamp_update_odr(struct inv_icm42600_timestamp *ts,
+				      uint32_t period, bool fifo)
+{
+	/* when FIFO is on, prevent odr change if one is already pending */
+	if (fifo && ts->new_mult != 0)
+		return -EAGAIN;
+
+	ts->new_mult = period / INV_ICM42600_TIMESTAMP_PERIOD;
+
+	return 0;
+}
+
+static bool inv_validate_period(uint32_t period, uint32_t mult)
+{
+	const uint32_t chip_period = INV_ICM42600_TIMESTAMP_PERIOD;
+	uint32_t period_min, period_max;
+
+	/* check that period is acceptable */
+	period_min = INV_ICM42600_TIMESTAMP_MIN_PERIOD(chip_period) * mult;
+	period_max = INV_ICM42600_TIMESTAMP_MAX_PERIOD(chip_period) * mult;
+	if (period > period_min && period < period_max)
+		return true;
+	else
+		return false;
+}
+
+static bool inv_compute_chip_period(struct inv_icm42600_timestamp *ts,
+				    uint32_t mult, uint32_t period)
+{
+	uint32_t new_chip_period;
+
+	if (!inv_validate_period(period, mult))
+		return false;
+
+	/* update chip internal period estimation */
+	new_chip_period = period / mult;
+	inv_update_acc(&ts->chip_period, new_chip_period);
+
+	return true;
+}
+
+void inv_icm42600_timestamp_interrupt(struct inv_icm42600_timestamp *ts,
+				      uint32_t fifo_period, size_t fifo_nb,
+				      size_t sensor_nb, int64_t timestamp)
+{
+	struct inv_icm42600_timestamp_interval *it;
+	int64_t delta, interval;
+	const uint32_t fifo_mult = fifo_period / INV_ICM42600_TIMESTAMP_PERIOD;
+	uint32_t period = ts->period;
+	int32_t m;
+	bool valid = false;
+
+	if (fifo_nb == 0)
+		return;
+
+	/* update interrupt timestamp and compute chip and sensor periods */
+	it = &ts->it;
+	it->lo = it->up;
+	it->up = timestamp;
+	delta = it->up - it->lo;
+	if (it->lo != 0) {
+		/* compute period: delta time divided by number of samples */
+		period = div_s64(delta, fifo_nb);
+		valid = inv_compute_chip_period(ts, fifo_mult, period);
+		/* update sensor period if chip internal period is updated */
+		if (valid)
+			ts->period = ts->mult * ts->chip_period.val;
+	}
+
+	/* no previous data, compute theoritical value from interrupt */
+	if (ts->timestamp == 0) {
+		/* elapsed time: sensor period * sensor samples number */
+		interval = (int64_t)ts->period * (int64_t)sensor_nb;
+		ts->timestamp = it->up - interval;
+		return;
+	}
+
+	/* if interrupt interval is valid, sync with interrupt timestamp */
+	if (valid) {
+		/* compute measured fifo_period */
+		fifo_period = fifo_mult * ts->chip_period.val;
+		/* delta time between last sample and last interrupt */
+		delta = it->lo - ts->timestamp;
+		/* if there are multiple samples, go back to first one */
+		while (delta >= (fifo_period * 3 / 2))
+			delta -= fifo_period;
+		/* compute maximal adjustment value */
+		m = INV_ICM42600_TIMESTAMP_MAX_PERIOD(ts->period) - ts->period;
+		if (delta > m)
+			delta = m;
+		else if (delta < -m)
+			delta = -m;
+		ts->timestamp += delta;
+	}
+}
+
+void inv_icm42600_timestamp_apply_odr(struct inv_icm42600_timestamp *ts,
+				      uint32_t fifo_period, size_t fifo_nb,
+				      unsigned int fifo_no)
+{
+	int64_t interval;
+	uint32_t fifo_mult;
+
+	if (ts->new_mult == 0)
+		return;
+
+	/* update to new multiplier and update period */
+	ts->mult = ts->new_mult;
+	ts->new_mult = 0;
+	ts->period = ts->mult * ts->chip_period.val;
+
+	/*
+	 * After ODR change the time interval with the previous sample is
+	 * undertermined (depends when the change occures). So we compute the
+	 * timestamp from the current interrupt using the new FIFO period, the
+	 * total number of samples and the current sample numero.
+	 */
+	if (ts->timestamp != 0) {
+		/* compute measured fifo period */
+		fifo_mult = fifo_period / INV_ICM42600_TIMESTAMP_PERIOD;
+		fifo_period = fifo_mult * ts->chip_period.val;
+		/* computes time interval between interrupt and this sample */
+		interval = (int64_t)(fifo_nb - fifo_no) * (int64_t)fifo_period;
+		ts->timestamp = ts->it.up - interval;
+	}
+}