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, 386 insertions, 0 deletions

diff --git a/arch/s390/pci/pci_bus.c b/arch/s390/pci/pci_bus.c
new file mode 100644
index 000000000..6a8da1b74
--- /dev/null
+++ b/arch/s390/pci/pci_bus.c
@@ -0,0 +1,386 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright IBM Corp. 2020
+ *
+ * Author(s):
+ *   Pierre Morel <pmorel@linux.ibm.com>
+ *
+ */
+
+#define KMSG_COMPONENT "zpci"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/export.h>
+#include <linux/delay.h>
+#include <linux/seq_file.h>
+#include <linux/jump_label.h>
+#include <linux/pci.h>
+#include <linux/printk.h>
+
+#include <asm/pci_clp.h>
+#include <asm/pci_dma.h>
+
+#include "pci_bus.h"
+#include "pci_iov.h"
+
+static LIST_HEAD(zbus_list);
+static DEFINE_MUTEX(zbus_list_lock);
+static int zpci_nb_devices;
+
+/* zpci_bus_prepare_device - Prepare a zPCI function for scanning
+ * @zdev: the zPCI function to be prepared
+ *
+ * The PCI resources for the function are set up and added to its zbus and the
+ * function is enabled. The function must be added to a zbus which must have
+ * a PCI bus created. If an error occurs the zPCI function is not enabled.
+ *
+ * Return: 0 on success, an error code otherwise
+ */
+static int zpci_bus_prepare_device(struct zpci_dev *zdev)
+{
+	struct resource_entry *window, *n;
+	struct resource *res;
+	int rc;
+
+	if (!zdev_enabled(zdev)) {
+		rc = zpci_enable_device(zdev);
+		if (rc)
+			return rc;
+		rc = zpci_dma_init_device(zdev);
+		if (rc) {
+			zpci_disable_device(zdev);
+			return rc;
+		}
+	}
+
+	if (!zdev->has_resources) {
+		zpci_setup_bus_resources(zdev, &zdev->zbus->resources);
+		resource_list_for_each_entry_safe(window, n, &zdev->zbus->resources) {
+			res = window->res;
+			pci_bus_add_resource(zdev->zbus->bus, res, 0);
+		}
+	}
+
+	return 0;
+}
+
+/* zpci_bus_scan_device - Scan a single device adding it to the PCI core
+ * @zdev: the zdev to be scanned
+ *
+ * Scans the PCI function making it available to the common PCI code.
+ *
+ * Return: 0 on success, an error value otherwise
+ */
+int zpci_bus_scan_device(struct zpci_dev *zdev)
+{
+	struct pci_dev *pdev;
+	int rc;
+
+	rc = zpci_bus_prepare_device(zdev);
+	if (rc)
+		return rc;
+
+	pdev = pci_scan_single_device(zdev->zbus->bus, zdev->devfn);
+	if (!pdev)
+		return -ENODEV;
+
+	pci_bus_add_device(pdev);
+	pci_lock_rescan_remove();
+	pci_bus_add_devices(zdev->zbus->bus);
+	pci_unlock_rescan_remove();
+
+	return 0;
+}
+
+/* zpci_bus_remove_device - Removes the given zdev from the PCI core
+ * @zdev: the zdev to be removed from the PCI core
+ * @set_error: if true the device's error state is set to permanent failure
+ *
+ * Sets a zPCI device to a configured but offline state; the zPCI
+ * device is still accessible through its hotplug slot and the zPCI
+ * API but is removed from the common code PCI bus, making it
+ * no longer available to drivers.
+ */
+void zpci_bus_remove_device(struct zpci_dev *zdev, bool set_error)
+{
+	struct zpci_bus *zbus = zdev->zbus;
+	struct pci_dev *pdev;
+
+	if (!zdev->zbus->bus)
+		return;
+
+	pdev = pci_get_slot(zbus->bus, zdev->devfn);
+	if (pdev) {
+		if (set_error)
+			pdev->error_state = pci_channel_io_perm_failure;
+		if (pdev->is_virtfn) {
+			zpci_iov_remove_virtfn(pdev, zdev->vfn);
+			/* balance pci_get_slot */
+			pci_dev_put(pdev);
+			return;
+		}
+		pci_stop_and_remove_bus_device_locked(pdev);
+		/* balance pci_get_slot */
+		pci_dev_put(pdev);
+	}
+}
+
+/* zpci_bus_scan_bus - Scan all configured zPCI functions on the bus
+ * @zbus: the zbus to be scanned
+ *
+ * Enables and scans all PCI functions on the bus making them available to the
+ * common PCI code. If there is no function 0 on the zbus nothing is scanned. If
+ * a function does not have a slot yet because it was added to the zbus before
+ * function 0 the slot is created. If a PCI function fails to be initialized
+ * an error will be returned but attempts will still be made for all other
+ * functions on the bus.
+ *
+ * Return: 0 on success, an error value otherwise
+ */
+int zpci_bus_scan_bus(struct zpci_bus *zbus)
+{
+	struct zpci_dev *zdev;
+	int devfn, rc, ret = 0;
+
+	for (devfn = 0; devfn < ZPCI_FUNCTIONS_PER_BUS; devfn++) {
+		zdev = zbus->function[devfn];
+		if (zdev && zdev->state == ZPCI_FN_STATE_CONFIGURED) {
+			rc = zpci_bus_prepare_device(zdev);
+			if (rc)
+				ret = -EIO;
+		}
+	}
+
+	pci_lock_rescan_remove();
+	pci_scan_child_bus(zbus->bus);
+	pci_bus_add_devices(zbus->bus);
+	pci_unlock_rescan_remove();
+
+	return ret;
+}
+
+/* zpci_bus_scan_busses - Scan all registered busses
+ *
+ * Scan all available zbusses
+ *
+ */
+void zpci_bus_scan_busses(void)
+{
+	struct zpci_bus *zbus = NULL;
+
+	mutex_lock(&zbus_list_lock);
+	list_for_each_entry(zbus, &zbus_list, bus_next) {
+		zpci_bus_scan_bus(zbus);
+		cond_resched();
+	}
+	mutex_unlock(&zbus_list_lock);
+}
+
+/* zpci_bus_create_pci_bus - Create the PCI bus associated with this zbus
+ * @zbus: the zbus holding the zdevices
+ * @fr: PCI root function that will determine the bus's domain, and bus speeed
+ * @ops: the pci operations
+ *
+ * The PCI function @fr determines the domain (its UID), multifunction property
+ * and maximum bus speed of the entire bus.
+ *
+ * Return: 0 on success, an error code otherwise
+ */
+static int zpci_bus_create_pci_bus(struct zpci_bus *zbus, struct zpci_dev *fr, struct pci_ops *ops)
+{
+	struct pci_bus *bus;
+	int domain;
+
+	domain = zpci_alloc_domain((u16)fr->uid);
+	if (domain < 0)
+		return domain;
+
+	zbus->domain_nr = domain;
+	zbus->multifunction = fr->rid_available;
+	zbus->max_bus_speed = fr->max_bus_speed;
+
+	/*
+	 * Note that the zbus->resources are taken over and zbus->resources
+	 * is empty after a successful call
+	 */
+	bus = pci_create_root_bus(NULL, ZPCI_BUS_NR, ops, zbus, &zbus->resources);
+	if (!bus) {
+		zpci_free_domain(zbus->domain_nr);
+		return -EFAULT;
+	}
+
+	zbus->bus = bus;
+	pci_bus_add_devices(bus);
+
+	return 0;
+}
+
+static void zpci_bus_release(struct kref *kref)
+{
+	struct zpci_bus *zbus = container_of(kref, struct zpci_bus, kref);
+
+	if (zbus->bus) {
+		pci_lock_rescan_remove();
+		pci_stop_root_bus(zbus->bus);
+
+		zpci_free_domain(zbus->domain_nr);
+		pci_free_resource_list(&zbus->resources);
+
+		pci_remove_root_bus(zbus->bus);
+		pci_unlock_rescan_remove();
+	}
+
+	mutex_lock(&zbus_list_lock);
+	list_del(&zbus->bus_next);
+	mutex_unlock(&zbus_list_lock);
+	kfree(zbus);
+}
+
+static void zpci_bus_put(struct zpci_bus *zbus)
+{
+	kref_put(&zbus->kref, zpci_bus_release);
+}
+
+static struct zpci_bus *zpci_bus_get(int pchid)
+{
+	struct zpci_bus *zbus;
+
+	mutex_lock(&zbus_list_lock);
+	list_for_each_entry(zbus, &zbus_list, bus_next) {
+		if (pchid == zbus->pchid) {
+			kref_get(&zbus->kref);
+			goto out_unlock;
+		}
+	}
+	zbus = NULL;
+out_unlock:
+	mutex_unlock(&zbus_list_lock);
+	return zbus;
+}
+
+static struct zpci_bus *zpci_bus_alloc(int pchid)
+{
+	struct zpci_bus *zbus;
+
+	zbus = kzalloc(sizeof(*zbus), GFP_KERNEL);
+	if (!zbus)
+		return NULL;
+
+	zbus->pchid = pchid;
+	INIT_LIST_HEAD(&zbus->bus_next);
+	mutex_lock(&zbus_list_lock);
+	list_add_tail(&zbus->bus_next, &zbus_list);
+	mutex_unlock(&zbus_list_lock);
+
+	kref_init(&zbus->kref);
+	INIT_LIST_HEAD(&zbus->resources);
+
+	zbus->bus_resource.start = 0;
+	zbus->bus_resource.end = ZPCI_BUS_NR;
+	zbus->bus_resource.flags = IORESOURCE_BUS;
+	pci_add_resource(&zbus->resources, &zbus->bus_resource);
+
+	return zbus;
+}
+
+void pcibios_bus_add_device(struct pci_dev *pdev)
+{
+	struct zpci_dev *zdev = to_zpci(pdev);
+
+	/*
+	 * With pdev->no_vf_scan the common PCI probing code does not
+	 * perform PF/VF linking.
+	 */
+	if (zdev->vfn) {
+		zpci_iov_setup_virtfn(zdev->zbus, pdev, zdev->vfn);
+		pdev->no_command_memory = 1;
+	}
+}
+
+static int zpci_bus_add_device(struct zpci_bus *zbus, struct zpci_dev *zdev)
+{
+	int rc = -EINVAL;
+
+	if (zbus->function[zdev->devfn]) {
+		pr_err("devfn %04x is already assigned\n", zdev->devfn);
+		return rc;
+	}
+
+	zdev->zbus = zbus;
+	zbus->function[zdev->devfn] = zdev;
+	zpci_nb_devices++;
+
+	if (zbus->multifunction && !zdev->rid_available) {
+		WARN_ONCE(1, "rid_available not set for multifunction\n");
+		goto error;
+	}
+	rc = zpci_init_slot(zdev);
+	if (rc)
+		goto error;
+	zdev->has_hp_slot = 1;
+
+	return 0;
+
+error:
+	zbus->function[zdev->devfn] = NULL;
+	zdev->zbus = NULL;
+	zpci_nb_devices--;
+	return rc;
+}
+
+int zpci_bus_device_register(struct zpci_dev *zdev, struct pci_ops *ops)
+{
+	struct zpci_bus *zbus = NULL;
+	int rc = -EBADF;
+
+	if (zpci_nb_devices == ZPCI_NR_DEVICES) {
+		pr_warn("Adding PCI function %08x failed because the configured limit of %d is reached\n",
+			zdev->fid, ZPCI_NR_DEVICES);
+		return -ENOSPC;
+	}
+
+	if (zdev->devfn >= ZPCI_FUNCTIONS_PER_BUS)
+		return -EINVAL;
+
+	if (!s390_pci_no_rid && zdev->rid_available)
+		zbus = zpci_bus_get(zdev->pchid);
+
+	if (!zbus) {
+		zbus = zpci_bus_alloc(zdev->pchid);
+		if (!zbus)
+			return -ENOMEM;
+	}
+
+	if (!zbus->bus) {
+		/* The UID of the first PCI function registered with a zpci_bus
+		 * is used as the domain number for that bus. Currently there
+		 * is exactly one zpci_bus per domain.
+		 */
+		rc = zpci_bus_create_pci_bus(zbus, zdev, ops);
+		if (rc)
+			goto error;
+	}
+
+	rc = zpci_bus_add_device(zbus, zdev);
+	if (rc)
+		goto error;
+
+	return 0;
+
+error:
+	pr_err("Adding PCI function %08x failed\n", zdev->fid);
+	zpci_bus_put(zbus);
+	return rc;
+}
+
+void zpci_bus_device_unregister(struct zpci_dev *zdev)
+{
+	struct zpci_bus *zbus = zdev->zbus;
+
+	zpci_nb_devices--;
+	zbus->function[zdev->devfn] = NULL;
+	zpci_bus_put(zbus);
+}