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, 320 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/hfi1/mmu_rb.c b/drivers/infiniband/hw/hfi1/mmu_rb.c
new file mode 100644
index 000000000..733364602
--- /dev/null
+++ b/drivers/infiniband/hw/hfi1/mmu_rb.c
@@ -0,0 +1,320 @@
+// SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause
+/*
+ * Copyright(c) 2020 Cornelis Networks, Inc.
+ * Copyright(c) 2016 - 2017 Intel Corporation.
+ */
+
+#include <linux/list.h>
+#include <linux/rculist.h>
+#include <linux/mmu_notifier.h>
+#include <linux/interval_tree_generic.h>
+#include <linux/sched/mm.h>
+
+#include "mmu_rb.h"
+#include "trace.h"
+
+static unsigned long mmu_node_start(struct mmu_rb_node *);
+static unsigned long mmu_node_last(struct mmu_rb_node *);
+static int mmu_notifier_range_start(struct mmu_notifier *,
+		const struct mmu_notifier_range *);
+static struct mmu_rb_node *__mmu_rb_search(struct mmu_rb_handler *,
+					   unsigned long, unsigned long);
+static void do_remove(struct mmu_rb_handler *handler,
+		      struct list_head *del_list);
+static void handle_remove(struct work_struct *work);
+
+static const struct mmu_notifier_ops mn_opts = {
+	.invalidate_range_start = mmu_notifier_range_start,
+};
+
+INTERVAL_TREE_DEFINE(struct mmu_rb_node, node, unsigned long, __last,
+		     mmu_node_start, mmu_node_last, static, __mmu_int_rb);
+
+static unsigned long mmu_node_start(struct mmu_rb_node *node)
+{
+	return node->addr & PAGE_MASK;
+}
+
+static unsigned long mmu_node_last(struct mmu_rb_node *node)
+{
+	return PAGE_ALIGN(node->addr + node->len) - 1;
+}
+
+int hfi1_mmu_rb_register(void *ops_arg,
+			 struct mmu_rb_ops *ops,
+			 struct workqueue_struct *wq,
+			 struct mmu_rb_handler **handler)
+{
+	struct mmu_rb_handler *h;
+	int ret;
+
+	h = kzalloc(sizeof(*h), GFP_KERNEL);
+	if (!h)
+		return -ENOMEM;
+
+	h->root = RB_ROOT_CACHED;
+	h->ops = ops;
+	h->ops_arg = ops_arg;
+	INIT_HLIST_NODE(&h->mn.hlist);
+	spin_lock_init(&h->lock);
+	h->mn.ops = &mn_opts;
+	INIT_WORK(&h->del_work, handle_remove);
+	INIT_LIST_HEAD(&h->del_list);
+	INIT_LIST_HEAD(&h->lru_list);
+	h->wq = wq;
+
+	ret = mmu_notifier_register(&h->mn, current->mm);
+	if (ret) {
+		kfree(h);
+		return ret;
+	}
+
+	*handler = h;
+	return 0;
+}
+
+void hfi1_mmu_rb_unregister(struct mmu_rb_handler *handler)
+{
+	struct mmu_rb_node *rbnode;
+	struct rb_node *node;
+	unsigned long flags;
+	struct list_head del_list;
+
+	/* Prevent freeing of mm until we are completely finished. */
+	mmgrab(handler->mn.mm);
+
+	/* Unregister first so we don't get any more notifications. */
+	mmu_notifier_unregister(&handler->mn, handler->mn.mm);
+
+	/*
+	 * Make sure the wq delete handler is finished running.  It will not
+	 * be triggered once the mmu notifiers are unregistered above.
+	 */
+	flush_work(&handler->del_work);
+
+	INIT_LIST_HEAD(&del_list);
+
+	spin_lock_irqsave(&handler->lock, flags);
+	while ((node = rb_first_cached(&handler->root))) {
+		rbnode = rb_entry(node, struct mmu_rb_node, node);
+		rb_erase_cached(node, &handler->root);
+		/* move from LRU list to delete list */
+		list_move(&rbnode->list, &del_list);
+	}
+	spin_unlock_irqrestore(&handler->lock, flags);
+
+	do_remove(handler, &del_list);
+
+	/* Now the mm may be freed. */
+	mmdrop(handler->mn.mm);
+
+	kfree(handler);
+}
+
+int hfi1_mmu_rb_insert(struct mmu_rb_handler *handler,
+		       struct mmu_rb_node *mnode)
+{
+	struct mmu_rb_node *node;
+	unsigned long flags;
+	int ret = 0;
+
+	trace_hfi1_mmu_rb_insert(mnode->addr, mnode->len);
+
+	if (current->mm != handler->mn.mm)
+		return -EPERM;
+
+	spin_lock_irqsave(&handler->lock, flags);
+	node = __mmu_rb_search(handler, mnode->addr, mnode->len);
+	if (node) {
+		ret = -EINVAL;
+		goto unlock;
+	}
+	__mmu_int_rb_insert(mnode, &handler->root);
+	list_add(&mnode->list, &handler->lru_list);
+
+	ret = handler->ops->insert(handler->ops_arg, mnode);
+	if (ret) {
+		__mmu_int_rb_remove(mnode, &handler->root);
+		list_del(&mnode->list); /* remove from LRU list */
+	}
+	mnode->handler = handler;
+unlock:
+	spin_unlock_irqrestore(&handler->lock, flags);
+	return ret;
+}
+
+/* Caller must hold handler lock */
+static struct mmu_rb_node *__mmu_rb_search(struct mmu_rb_handler *handler,
+					   unsigned long addr,
+					   unsigned long len)
+{
+	struct mmu_rb_node *node = NULL;
+
+	trace_hfi1_mmu_rb_search(addr, len);
+	if (!handler->ops->filter) {
+		node = __mmu_int_rb_iter_first(&handler->root, addr,
+					       (addr + len) - 1);
+	} else {
+		for (node = __mmu_int_rb_iter_first(&handler->root, addr,
+						    (addr + len) - 1);
+		     node;
+		     node = __mmu_int_rb_iter_next(node, addr,
+						   (addr + len) - 1)) {
+			if (handler->ops->filter(node, addr, len))
+				return node;
+		}
+	}
+	return node;
+}
+
+bool hfi1_mmu_rb_remove_unless_exact(struct mmu_rb_handler *handler,
+				     unsigned long addr, unsigned long len,
+				     struct mmu_rb_node **rb_node)
+{
+	struct mmu_rb_node *node;
+	unsigned long flags;
+	bool ret = false;
+
+	if (current->mm != handler->mn.mm)
+		return ret;
+
+	spin_lock_irqsave(&handler->lock, flags);
+	node = __mmu_rb_search(handler, addr, len);
+	if (node) {
+		if (node->addr == addr && node->len == len)
+			goto unlock;
+		__mmu_int_rb_remove(node, &handler->root);
+		list_del(&node->list); /* remove from LRU list */
+		ret = true;
+	}
+unlock:
+	spin_unlock_irqrestore(&handler->lock, flags);
+	*rb_node = node;
+	return ret;
+}
+
+void hfi1_mmu_rb_evict(struct mmu_rb_handler *handler, void *evict_arg)
+{
+	struct mmu_rb_node *rbnode, *ptr;
+	struct list_head del_list;
+	unsigned long flags;
+	bool stop = false;
+
+	if (current->mm != handler->mn.mm)
+		return;
+
+	INIT_LIST_HEAD(&del_list);
+
+	spin_lock_irqsave(&handler->lock, flags);
+	list_for_each_entry_safe_reverse(rbnode, ptr, &handler->lru_list,
+					 list) {
+		if (handler->ops->evict(handler->ops_arg, rbnode, evict_arg,
+					&stop)) {
+			__mmu_int_rb_remove(rbnode, &handler->root);
+			/* move from LRU list to delete list */
+			list_move(&rbnode->list, &del_list);
+		}
+		if (stop)
+			break;
+	}
+	spin_unlock_irqrestore(&handler->lock, flags);
+
+	while (!list_empty(&del_list)) {
+		rbnode = list_first_entry(&del_list, struct mmu_rb_node, list);
+		list_del(&rbnode->list);
+		handler->ops->remove(handler->ops_arg, rbnode);
+	}
+}
+
+/*
+ * It is up to the caller to ensure that this function does not race with the
+ * mmu invalidate notifier which may be calling the users remove callback on
+ * 'node'.
+ */
+void hfi1_mmu_rb_remove(struct mmu_rb_handler *handler,
+			struct mmu_rb_node *node)
+{
+	unsigned long flags;
+
+	if (current->mm != handler->mn.mm)
+		return;
+
+	/* Validity of handler and node pointers has been checked by caller. */
+	trace_hfi1_mmu_rb_remove(node->addr, node->len);
+	spin_lock_irqsave(&handler->lock, flags);
+	__mmu_int_rb_remove(node, &handler->root);
+	list_del(&node->list); /* remove from LRU list */
+	spin_unlock_irqrestore(&handler->lock, flags);
+
+	handler->ops->remove(handler->ops_arg, node);
+}
+
+static int mmu_notifier_range_start(struct mmu_notifier *mn,
+		const struct mmu_notifier_range *range)
+{
+	struct mmu_rb_handler *handler =
+		container_of(mn, struct mmu_rb_handler, mn);
+	struct rb_root_cached *root = &handler->root;
+	struct mmu_rb_node *node, *ptr = NULL;
+	unsigned long flags;
+	bool added = false;
+
+	spin_lock_irqsave(&handler->lock, flags);
+	for (node = __mmu_int_rb_iter_first(root, range->start, range->end-1);
+	     node; node = ptr) {
+		/* Guard against node removal. */
+		ptr = __mmu_int_rb_iter_next(node, range->start,
+					     range->end - 1);
+		trace_hfi1_mmu_mem_invalidate(node->addr, node->len);
+		if (handler->ops->invalidate(handler->ops_arg, node)) {
+			__mmu_int_rb_remove(node, root);
+			/* move from LRU list to delete list */
+			list_move(&node->list, &handler->del_list);
+			added = true;
+		}
+	}
+	spin_unlock_irqrestore(&handler->lock, flags);
+
+	if (added)
+		queue_work(handler->wq, &handler->del_work);
+
+	return 0;
+}
+
+/*
+ * Call the remove function for the given handler and the list.  This
+ * is expected to be called with a delete list extracted from handler.
+ * The caller should not be holding the handler lock.
+ */
+static void do_remove(struct mmu_rb_handler *handler,
+		      struct list_head *del_list)
+{
+	struct mmu_rb_node *node;
+
+	while (!list_empty(del_list)) {
+		node = list_first_entry(del_list, struct mmu_rb_node, list);
+		list_del(&node->list);
+		handler->ops->remove(handler->ops_arg, node);
+	}
+}
+
+/*
+ * Work queue function to remove all nodes that have been queued up to
+ * be removed.  The key feature is that mm->mmap_lock is not being held
+ * and the remove callback can sleep while taking it, if needed.
+ */
+static void handle_remove(struct work_struct *work)
+{
+	struct mmu_rb_handler *handler = container_of(work,
+						struct mmu_rb_handler,
+						del_work);
+	struct list_head del_list;
+	unsigned long flags;
+
+	/* remove anything that is queued to get removed */
+	spin_lock_irqsave(&handler->lock, flags);
+	list_replace_init(&handler->del_list, &del_list);
+	spin_unlock_irqrestore(&handler->lock, flags);
+
+	do_remove(handler, &del_list);
+}