Merge tag 'net-next-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski:
 "Core & protocols:

   - Wrap datapath globals into net_aligned_data, to avoid false sharing

   - Preserve MSG_ZEROCOPY in forwarding (e.g. out of a container)

   - Add SO_INQ and SCM_INQ support to AF_UNIX

   - Add SIOCINQ support to AF_VSOCK

   - Add TCP_MAXSEG sockopt to MPTCP

   - Add IPv6 force_forwarding sysctl to enable forwarding per interface

   - Make TCP validation of whether packet fully fits in the receive
     window and the rcv_buf more strict. With increased use of HW
     aggregation a single "packet" can be multiple 100s of kB

   - Add MSG_MORE flag to optimize large TCP transmissions via sockmap,
     improves latency up to 33% for sockmap users

   - Convert TCP send queue handling from tasklet to BH workque

   - Improve BPF iteration over TCP sockets to see each socket exactly
     once

   - Remove obsolete and unused TCP RFC3517/RFC6675 loss recovery code

   - Support enabling kernel threads for NAPI processing on per-NAPI
     instance basis rather than a whole device. Fully stop the kernel
     NAPI thread when threaded NAPI gets disabled. Previously thread
     would stick around until ifdown due to tricky synchronization

   - Allow multicast routing to take effect on locally-generated packets

   - Add output interface argument for End.X in segment routing

   - MCTP: add support for gateway routing, improve bind() handling

   - Don't require rtnl_lock when fetching an IPv6 neighbor over Netlink

   - Add a new neighbor flag ("extern_valid"), which cedes refresh
     responsibilities to userspace. This is needed for EVPN multi-homing
     where a neighbor entry for a multi-homed host needs to be synced
     across all the VTEPs among which the host is multi-homed

   - Support NUD_PERMANENT for proxy neighbor entries

   - Add a new queuing discipline for IETF RFC9332 DualQ Coupled AQM

   - Add sequence numbers to netconsole messages. Unregister
     netconsole's console when all net targets are removed. Code
     refactoring. Add a number of selftests

   - Align IPSec inbound SA lookup to RFC 4301. Only SPI and protocol
     should be used for an inbound SA lookup

   - Support inspecting ref_tracker state via DebugFS

   - Don't force bonding advertisement frames tx to ~333 ms boundaries.
     Add broadcast_neighbor option to send ARP/ND on all bonded links

   - Allow providing upcall pid for the 'execute' command in openvswitch

   - Remove DCCP support from Netfilter's conntrack

   - Disallow multiple packet duplications in the queuing layer

   - Prevent use of deprecated iptables code on PREEMPT_RT

  Driver API:

   - Support RSS and hashing configuration over ethtool Netlink

   - Add dedicated ethtool callbacks for getting and setting hashing
     fields

   - Add support for power budget evaluation strategy in PSE /
     Power-over-Ethernet. Generate Netlink events for overcurrent etc

   - Support DPLL phase offset monitoring across all device inputs.
     Support providing clock reference and SYNC over separate DPLL
     inputs

   - Support traffic classes in devlink rate API for bandwidth
     management

   - Remove rtnl_lock dependency from UDP tunnel port configuration

  Device drivers:

   - Add a new Broadcom driver for 800G Ethernet (bnge)

   - Add a standalone driver for Microchip ZL3073x DPLL

   - Remove IBM's NETIUCV device driver

   - Ethernet high-speed NICs:
      - Broadcom (bnxt):
         - support zero-copy Tx of DMABUF memory
         - take page size into account for page pool recycling rings
      - Intel (100G, ice, idpf):
         - idpf: XDP and AF_XDP support preparations
         - idpf: add flow steering
         - add link_down_events statistic
         - clean up the TSPLL code
         - preparations for live VM migration
      - nVidia/Mellanox:
         - support zero-copy Rx/Tx interfaces (DMABUF and io_uring)
         - optimize context memory usage for matchers
         - expose serial numbers in devlink info
         - support PCIe congestion metrics
      - Meta (fbnic):
         - add 25G, 50G, and 100G link modes to phylink
         - support dumping FW logs
      - Marvell/Cavium:
         - support for CN20K generation of the Octeon chips
      - Amazon:
         - add HW clock (without timestamping, just hypervisor time access)

   - Ethernet virtual:
      - VirtIO net:
         - support segmentation of UDP-tunnel-encapsulated packets
      - Google (gve):
         - support packet timestamping and clock synchronization
      - Microsoft vNIC:
         - add handler for device-originated servicing events
         - allow dynamic MSI-X vector allocation
         - support Tx bandwidth clamping

   - Ethernet NICs consumer, and embedded:
      - AMD:
         - amd-xgbe: hardware timestamping and PTP clock support
      - Broadcom integrated MACs (bcmgenet, bcmasp):
         - use napi_complete_done() return value to support NAPI polling
         - add support for re-starting auto-negotiation
      - Broadcom switches (b53):
         - support BCM5325 switches
         - add bcm63xx EPHY power control
      - Synopsys (stmmac):
         - lots of code refactoring and cleanups
      - TI:
         - icssg-prueth: read firmware-names from device tree
         - icssg: PRP offload support
      - Microchip:
         - lan78xx: convert to PHYLINK for improved PHY and MAC management
         - ksz: add KSZ8463 switch support
      - Intel:
         - support similar queue priority scheme in multi-queue and
           time-sensitive networking (taprio)
         - support packet pre-emption in both
      - RealTek (r8169):
         - enable EEE at 5Gbps on RTL8126
      - Airoha:
         - add PPPoE offload support
         - MDIO bus controller for Airoha AN7583

   - Ethernet PHYs:
      - support for the IPQ5018 internal GE PHY
      - micrel KSZ9477 switch-integrated PHYs:
         - add MDI/MDI-X control support
         - add RX error counters
         - add cable test support
         - add Signal Quality Indicator (SQI) reporting
      - dp83tg720: improve reset handling and reduce link recovery time
      - support bcm54811 (and its MII-Lite interface type)
      - air_en8811h: support resume/suspend
      - support PHY counters for QCA807x and QCA808x
      - support WoL for QCA807x

   - CAN drivers:
      - rcar_canfd: support for Transceiver Delay Compensation
      - kvaser: report FW versions via devlink dev info

   - WiFi:
      - extended regulatory info support (6 GHz)
      - add statistics and beacon monitor for Multi-Link Operation (MLO)
      - support S1G aggregation, improve S1G support
      - add Radio Measurement action fields
      - support per-radio RTS threshold
      - some work around how FIPS affects wifi, which was wrong (RC4 is
        used by TKIP, not only WEP)
      - improvements for unsolicited probe response handling

   - WiFi drivers:
      - RealTek (rtw88):
         - IBSS mode for SDIO devices
      - RealTek (rtw89):
         - BT coexistence for MLO/WiFi7
         - concurrent station + P2P support
         - support for USB devices RTL8851BU/RTL8852BU
      - Intel (iwlwifi):
         - use embedded PNVM in (to be released) FW images to fix
           compatibility issues
         - many cleanups (unused FW APIs, PCIe code, WoWLAN)
         - some FIPS interoperability
      - MediaTek (mt76):
         - firmware recovery improvements
         - more MLO work
      - Qualcomm/Atheros (ath12k):
         - fix scan on multi-radio devices
         - more EHT/Wi-Fi 7 features
         - encapsulation/decapsulation offload
      - Broadcom (brcm80211):
         - support SDIO 43751 device

   - Bluetooth:
      - hci_event: add support for handling LE BIG Sync Lost event
      - ISO: add socket option to report packet seqnum via CMSG
      - ISO: support SCM_TIMESTAMPING for ISO TS

   - Bluetooth drivers:
      - intel_pcie: support Function Level Reset
      - nxpuart: add support for 4M baudrate
      - nxpuart: implement powerup sequence, reset, FW dump, and FW loading"

* tag 'net-next-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1742 commits)
  dpll: zl3073x: Fix build failure
  selftests: bpf: fix legacy netfilter options
  ipv6: annotate data-races around rt->fib6_nsiblings
  ipv6: fix possible infinite loop in fib6_info_uses_dev()
  ipv6: prevent infinite loop in rt6_nlmsg_size()
  ipv6: add a retry logic in net6_rt_notify()
  vrf: Drop existing dst reference in vrf_ip6_input_dst
  net/sched: taprio: align entry index attr validation with mqprio
  net: fsl_pq_mdio: use dev_err_probe
  selftests: rtnetlink.sh: remove esp4_offload after test
  vsock: remove unnecessary null check in vsock_getname()
  igb: xsk: solve negative overflow of nb_pkts in zerocopy mode
  stmmac: xsk: fix negative overflow of budget in zerocopy mode
  dt-bindings: ieee802154: Convert at86rf230.txt yaml format
  net: dsa: microchip: Disable PTP function of KSZ8463
  net: dsa: microchip: Setup fiber ports for KSZ8463
  net: dsa: microchip: Write switch MAC address differently for KSZ8463
  net: dsa: microchip: Use different registers for KSZ8463
  net: dsa: microchip: Add KSZ8463 switch support to KSZ DSA driver
  dt-bindings: net: dsa: microchip: Add KSZ8463 switch support
  ...

1 files changed, 112 insertions, 1 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-utils.c b/drivers/net/wireless/intel/iwlwifi/iwl-utils.c
index c5b49851e4b9..d503544fda40 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-utils.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-utils.c
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
 /*
- * Copyright (C) 2024 Intel Corporation
+ * Copyright (C) 2024-2025 Intel Corporation
  */
 #include <net/gso.h>
 #include <linux/ieee80211.h>
@@ -82,3 +82,114 @@ int iwl_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
 }
 IWL_EXPORT_SYMBOL(iwl_tx_tso_segment);
 #endif /* CONFIG_INET */
+
+static u32 iwl_div_by_db(u32 value, u8 db)
+{
+	/*
+	 * 2^32 * 10**(i / 10) for i = [1, 10], skipping 0 and simply stopping
+	 * at 10 dB and looping instead of using a much larger table.
+	 *
+	 * Using 64 bit math is overkill, but means the helper does not require
+	 * a limit on the input range.
+	 */
+	static const u32 db_to_val[] = {
+		0xcb59185e, 0xa1866ba8, 0x804dce7a, 0x65ea59fe, 0x50f44d89,
+		0x404de61f, 0x331426af, 0x2892c18b, 0x203a7e5b, 0x1999999a,
+	};
+
+	while (value && db > 0) {
+		u8 change = min_t(u8, db, ARRAY_SIZE(db_to_val));
+
+		value = (((u64)value) * db_to_val[change - 1]) >> 32;
+
+		db -= change;
+	}
+
+	return value;
+}
+
+s8 iwl_average_neg_dbm(const u8 *neg_dbm_values, u8 len)
+{
+	int average_magnitude;
+	u32 average_factor;
+	int sum_magnitude = -128;
+	u32 sum_factor = 0;
+	int i, count = 0;
+
+	/*
+	 * To properly average the decibel values (signal values given in dBm)
+	 * we need to do the math in linear space.  Doing a linear average of
+	 * dB (dBm) values is a bit annoying though due to the large range of
+	 * at least -10 to -110 dBm that will not fit into a 32 bit integer.
+	 *
+	 * A 64 bit integer should be sufficient, but then we still have the
+	 * problem that there are no directly usable utility functions
+	 * available.
+	 *
+	 * So, lets not deal with that and instead do much of the calculation
+	 * with a 16.16 fixed point integer along with a base in dBm. 16.16 bit
+	 * gives us plenty of head-room for adding up a few values and even
+	 * doing some math on it. And the tail should be accurate enough too
+	 * (1/2^16 is somewhere around -48 dB, so effectively zero).
+	 *
+	 * i.e. the real value of sum is:
+	 *      sum = sum_factor / 2^16 * 10^(sum_magnitude / 10) mW
+	 *
+	 * However, that does mean we need to be able to bring two values to
+	 * a common base, so we need a helper for that.
+	 *
+	 * Note that this function takes an input with unsigned negative dBm
+	 * values but returns a signed dBm (i.e. a negative value).
+	 */
+
+	for (i = 0; i < len; i++) {
+		int val_magnitude;
+		u32 val_factor;
+
+		/* Assume invalid */
+		if (neg_dbm_values[i] == 0xff)
+			continue;
+
+		val_factor = 0x10000;
+		val_magnitude = -neg_dbm_values[i];
+
+		if (val_magnitude <= sum_magnitude) {
+			u8 div_db = sum_magnitude - val_magnitude;
+
+			val_factor = iwl_div_by_db(val_factor, div_db);
+			val_magnitude = sum_magnitude;
+		} else {
+			u8 div_db = val_magnitude - sum_magnitude;
+
+			sum_factor = iwl_div_by_db(sum_factor, div_db);
+			sum_magnitude = val_magnitude;
+		}
+
+		sum_factor += val_factor;
+		count++;
+	}
+
+	/* No valid noise measurement, return a very high noise level */
+	if (count == 0)
+		return 0;
+
+	average_magnitude = sum_magnitude;
+	average_factor = sum_factor / count;
+
+	/*
+	 * average_factor will be a number smaller than 1.0 (0x10000) at this
+	 * point. What we need to do now is to adjust average_magnitude so that
+	 * average_factor is between -0.5 dB and 0.5 dB.
+	 *
+	 * Just do -1 dB steps and find the point where
+	 *   -0.5 dB * -i dB = 0x10000 * 10^(-0.5/10) / i dB
+	 *                   = div_by_db(0xe429, i)
+	 * is smaller than average_factor.
+	 */
+	for (i = 0; average_factor < iwl_div_by_db(0xe429, i); i++) {
+		/* nothing */
+	}
+
+	return clamp(average_magnitude - i, -128, 0);
+}
+IWL_EXPORT_SYMBOL(iwl_average_neg_dbm);