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, 333 insertions, 0 deletions

diff --git a/drivers/net/wwan/iosm/iosm_ipc_pm.c b/drivers/net/wwan/iosm/iosm_ipc_pm.c
new file mode 100644
index 000000000..413601c72
--- /dev/null
+++ b/drivers/net/wwan/iosm/iosm_ipc_pm.c
@@ -0,0 +1,333 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020-21 Intel Corporation.
+ */
+
+#include "iosm_ipc_protocol.h"
+
+/* Timeout value in MS for the PM to wait for device to reach active state */
+#define IPC_PM_ACTIVE_TIMEOUT_MS (500)
+
+/* Note that here "active" has the value 1, as compared to the enums
+ * ipc_mem_host_pm_state or ipc_mem_dev_pm_state, where "active" is 0
+ */
+#define IPC_PM_SLEEP (0)
+#define CONSUME_STATE (0)
+#define IPC_PM_ACTIVE (1)
+
+void ipc_pm_signal_hpda_doorbell(struct iosm_pm *ipc_pm, u32 identifier,
+				 bool host_slp_check)
+{
+	if (host_slp_check && ipc_pm->host_pm_state != IPC_MEM_HOST_PM_ACTIVE &&
+	    ipc_pm->host_pm_state != IPC_MEM_HOST_PM_ACTIVE_WAIT) {
+		ipc_pm->pending_hpda_update = true;
+		dev_dbg(ipc_pm->dev,
+			"Pend HPDA update set. Host PM_State: %d identifier:%d",
+			ipc_pm->host_pm_state, identifier);
+		return;
+	}
+
+	if (!ipc_pm_trigger(ipc_pm, IPC_PM_UNIT_IRQ, true)) {
+		ipc_pm->pending_hpda_update = true;
+		dev_dbg(ipc_pm->dev, "Pending HPDA update set. identifier:%d",
+			identifier);
+		return;
+	}
+	ipc_pm->pending_hpda_update = false;
+
+	/* Trigger the irq towards CP */
+	ipc_cp_irq_hpda_update(ipc_pm->pcie, identifier);
+
+	ipc_pm_trigger(ipc_pm, IPC_PM_UNIT_IRQ, false);
+}
+
+/* Wake up the device if it is in low power mode. */
+static bool ipc_pm_link_activate(struct iosm_pm *ipc_pm)
+{
+	if (ipc_pm->cp_state == IPC_MEM_DEV_PM_ACTIVE)
+		return true;
+
+	if (ipc_pm->cp_state == IPC_MEM_DEV_PM_SLEEP) {
+		if (ipc_pm->ap_state == IPC_MEM_DEV_PM_SLEEP) {
+			/* Wake up the device. */
+			ipc_cp_irq_sleep_control(ipc_pm->pcie,
+						 IPC_MEM_DEV_PM_WAKEUP);
+			ipc_pm->ap_state = IPC_MEM_DEV_PM_ACTIVE_WAIT;
+
+			goto not_active;
+		}
+
+		if (ipc_pm->ap_state == IPC_MEM_DEV_PM_ACTIVE_WAIT)
+			goto not_active;
+
+		return true;
+	}
+
+not_active:
+	/* link is not ready */
+	return false;
+}
+
+bool ipc_pm_wait_for_device_active(struct iosm_pm *ipc_pm)
+{
+	bool ret_val = false;
+
+	if (ipc_pm->ap_state != IPC_MEM_DEV_PM_ACTIVE) {
+		/* Complete all memory stores before setting bit */
+		smp_mb__before_atomic();
+
+		/* Wait for IPC_PM_ACTIVE_TIMEOUT_MS for Device sleep state
+		 * machine to enter ACTIVE state.
+		 */
+		set_bit(0, &ipc_pm->host_sleep_pend);
+
+		/* Complete all memory stores after setting bit */
+		smp_mb__after_atomic();
+
+		if (!wait_for_completion_interruptible_timeout
+		   (&ipc_pm->host_sleep_complete,
+		    msecs_to_jiffies(IPC_PM_ACTIVE_TIMEOUT_MS))) {
+			dev_err(ipc_pm->dev,
+				"PM timeout. Expected State:%d. Actual: %d",
+				IPC_MEM_DEV_PM_ACTIVE, ipc_pm->ap_state);
+			goto  active_timeout;
+		}
+	}
+
+	ret_val = true;
+active_timeout:
+	/* Complete all memory stores before clearing bit */
+	smp_mb__before_atomic();
+
+	/* Reset the atomic variable in any case as device sleep
+	 * state machine change is no longer of interest.
+	 */
+	clear_bit(0, &ipc_pm->host_sleep_pend);
+
+	/* Complete all memory stores after clearing bit */
+	smp_mb__after_atomic();
+
+	return ret_val;
+}
+
+static void ipc_pm_on_link_sleep(struct iosm_pm *ipc_pm)
+{
+	/* pending sleep ack and all conditions are cleared
+	 * -> signal SLEEP__ACK to CP
+	 */
+	ipc_pm->cp_state = IPC_MEM_DEV_PM_SLEEP;
+	ipc_pm->ap_state = IPC_MEM_DEV_PM_SLEEP;
+
+	ipc_cp_irq_sleep_control(ipc_pm->pcie, IPC_MEM_DEV_PM_SLEEP);
+}
+
+static void ipc_pm_on_link_wake(struct iosm_pm *ipc_pm, bool ack)
+{
+	ipc_pm->ap_state = IPC_MEM_DEV_PM_ACTIVE;
+
+	if (ack) {
+		ipc_pm->cp_state = IPC_MEM_DEV_PM_ACTIVE;
+
+		ipc_cp_irq_sleep_control(ipc_pm->pcie, IPC_MEM_DEV_PM_ACTIVE);
+
+		/* check the consume state !!! */
+		if (test_bit(CONSUME_STATE, &ipc_pm->host_sleep_pend))
+			complete(&ipc_pm->host_sleep_complete);
+	}
+
+	/* Check for pending HPDA update.
+	 * Pending HP update could be because of sending message was
+	 * put on hold due to Device sleep state or due to TD update
+	 * which could be because of Device Sleep and Host Sleep
+	 * states.
+	 */
+	if (ipc_pm->pending_hpda_update &&
+	    ipc_pm->host_pm_state == IPC_MEM_HOST_PM_ACTIVE)
+		ipc_pm_signal_hpda_doorbell(ipc_pm, IPC_HP_PM_TRIGGER, true);
+}
+
+bool ipc_pm_trigger(struct iosm_pm *ipc_pm, enum ipc_pm_unit unit, bool active)
+{
+	union ipc_pm_cond old_cond;
+	union ipc_pm_cond new_cond;
+	bool link_active;
+
+	/* Save the current D3 state. */
+	new_cond = ipc_pm->pm_cond;
+	old_cond = ipc_pm->pm_cond;
+
+	/* Calculate the power state only in the runtime phase. */
+	switch (unit) {
+	case IPC_PM_UNIT_IRQ: /* CP irq */
+		new_cond.irq = active;
+		break;
+
+	case IPC_PM_UNIT_LINK: /* Device link state. */
+		new_cond.link = active;
+		break;
+
+	case IPC_PM_UNIT_HS: /* Host sleep trigger requires Link. */
+		new_cond.hs = active;
+		break;
+
+	default:
+		break;
+	}
+
+	/* Something changed ? */
+	if (old_cond.raw == new_cond.raw) {
+		/* Stay in the current PM state. */
+		link_active = old_cond.link == IPC_PM_ACTIVE;
+		goto ret;
+	}
+
+	ipc_pm->pm_cond = new_cond;
+
+	if (new_cond.link)
+		ipc_pm_on_link_wake(ipc_pm, unit == IPC_PM_UNIT_LINK);
+	else if (unit == IPC_PM_UNIT_LINK)
+		ipc_pm_on_link_sleep(ipc_pm);
+
+	if (old_cond.link == IPC_PM_SLEEP && new_cond.raw) {
+		link_active = ipc_pm_link_activate(ipc_pm);
+		goto ret;
+	}
+
+	link_active = old_cond.link == IPC_PM_ACTIVE;
+
+ret:
+	return link_active;
+}
+
+bool ipc_pm_prepare_host_sleep(struct iosm_pm *ipc_pm)
+{
+	/* suspend not allowed if host_pm_state is not IPC_MEM_HOST_PM_ACTIVE */
+	if (ipc_pm->host_pm_state != IPC_MEM_HOST_PM_ACTIVE) {
+		dev_err(ipc_pm->dev, "host_pm_state=%d\tExpected to be: %d",
+			ipc_pm->host_pm_state, IPC_MEM_HOST_PM_ACTIVE);
+		return false;
+	}
+
+	ipc_pm->host_pm_state = IPC_MEM_HOST_PM_SLEEP_WAIT_D3;
+
+	return true;
+}
+
+bool ipc_pm_prepare_host_active(struct iosm_pm *ipc_pm)
+{
+	if (ipc_pm->host_pm_state != IPC_MEM_HOST_PM_SLEEP) {
+		dev_err(ipc_pm->dev, "host_pm_state=%d\tExpected to be: %d",
+			ipc_pm->host_pm_state, IPC_MEM_HOST_PM_SLEEP);
+		return false;
+	}
+
+	/* Sending Sleep Exit message to CP. Update the state */
+	ipc_pm->host_pm_state = IPC_MEM_HOST_PM_ACTIVE_WAIT;
+
+	return true;
+}
+
+void ipc_pm_set_s2idle_sleep(struct iosm_pm *ipc_pm, bool sleep)
+{
+	if (sleep) {
+		ipc_pm->ap_state = IPC_MEM_DEV_PM_SLEEP;
+		ipc_pm->cp_state = IPC_MEM_DEV_PM_SLEEP;
+		ipc_pm->device_sleep_notification = IPC_MEM_DEV_PM_SLEEP;
+	} else {
+		ipc_pm->ap_state = IPC_MEM_DEV_PM_ACTIVE;
+		ipc_pm->cp_state = IPC_MEM_DEV_PM_ACTIVE;
+		ipc_pm->device_sleep_notification = IPC_MEM_DEV_PM_ACTIVE;
+		ipc_pm->pm_cond.link = IPC_PM_ACTIVE;
+	}
+}
+
+bool ipc_pm_dev_slp_notification(struct iosm_pm *ipc_pm, u32 cp_pm_req)
+{
+	if (cp_pm_req == ipc_pm->device_sleep_notification)
+		return false;
+
+	ipc_pm->device_sleep_notification = cp_pm_req;
+
+	/* Evaluate the PM request. */
+	switch (ipc_pm->cp_state) {
+	case IPC_MEM_DEV_PM_ACTIVE:
+		switch (cp_pm_req) {
+		case IPC_MEM_DEV_PM_ACTIVE:
+			break;
+
+		case IPC_MEM_DEV_PM_SLEEP:
+			/* Inform the PM that the device link can go down. */
+			ipc_pm_trigger(ipc_pm, IPC_PM_UNIT_LINK, false);
+			return true;
+
+		default:
+			dev_err(ipc_pm->dev,
+				"loc-pm=%d active: confused req-pm=%d",
+				ipc_pm->cp_state, cp_pm_req);
+			break;
+		}
+		break;
+
+	case IPC_MEM_DEV_PM_SLEEP:
+		switch (cp_pm_req) {
+		case IPC_MEM_DEV_PM_ACTIVE:
+			/* Inform the PM that the device link is active. */
+			ipc_pm_trigger(ipc_pm, IPC_PM_UNIT_LINK, true);
+			break;
+
+		case IPC_MEM_DEV_PM_SLEEP:
+			break;
+
+		default:
+			dev_err(ipc_pm->dev,
+				"loc-pm=%d sleep: confused req-pm=%d",
+				ipc_pm->cp_state, cp_pm_req);
+			break;
+		}
+		break;
+
+	default:
+		dev_err(ipc_pm->dev, "confused loc-pm=%d, req-pm=%d",
+			ipc_pm->cp_state, cp_pm_req);
+		break;
+	}
+
+	return false;
+}
+
+void ipc_pm_init(struct iosm_protocol *ipc_protocol)
+{
+	struct iosm_imem *ipc_imem = ipc_protocol->imem;
+	struct iosm_pm *ipc_pm = &ipc_protocol->pm;
+
+	ipc_pm->pcie = ipc_imem->pcie;
+	ipc_pm->dev = ipc_imem->dev;
+
+	ipc_pm->pm_cond.irq = IPC_PM_SLEEP;
+	ipc_pm->pm_cond.hs = IPC_PM_SLEEP;
+	ipc_pm->pm_cond.link = IPC_PM_ACTIVE;
+
+	ipc_pm->cp_state = IPC_MEM_DEV_PM_ACTIVE;
+	ipc_pm->ap_state = IPC_MEM_DEV_PM_ACTIVE;
+	ipc_pm->host_pm_state = IPC_MEM_HOST_PM_ACTIVE;
+
+	/* Create generic wait-for-completion handler for Host Sleep
+	 * and device sleep coordination.
+	 */
+	init_completion(&ipc_pm->host_sleep_complete);
+
+	/* Complete all memory stores before clearing bit */
+	smp_mb__before_atomic();
+
+	clear_bit(0, &ipc_pm->host_sleep_pend);
+
+	/* Complete all memory stores after clearing bit */
+	smp_mb__after_atomic();
+}
+
+void ipc_pm_deinit(struct iosm_protocol *proto)
+{
+	struct iosm_pm *ipc_pm = &proto->pm;
+
+	complete(&ipc_pm->host_sleep_complete);
+}