Merge tag 'net-next-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Paolo Abeni:
 "Core & protocols:

   - Improve drop account scalability on NUMA hosts for RAW and UDP
     sockets and the backlog, almost doubling the Pps capacity under DoS

   - Optimize the UDP RX performance under stress, reducing contention,
     revisiting the binary layout of the involved data structs and
     implementing NUMA-aware locking. This improves UDP RX performance
     by an additional 50%, even more under extreme conditions

   - Add support for PSP encryption of TCP connections; this mechanism
     has some similarities with IPsec and TLS, but offers superior HW
     offloads capabilities

   - Ongoing work to support Accurate ECN for TCP. AccECN allows more
     than one congestion notification signal per RTT and is a building
     block for Low Latency, Low Loss, and Scalable Throughput (L4S)

   - Reorganize the TCP socket binary layout for data locality, reducing
     the number of touched cachelines in the fastpath

   - Refactor skb deferral free to better scale on large multi-NUMA
     hosts, this improves TCP and UDP RX performances significantly on
     such HW

   - Increase the default socket memory buffer limits from 256K to 4M to
     better fit modern link speeds

   - Improve handling of setups with a large number of nexthop, making
     dump operating scaling linearly and avoiding unneeded
     synchronize_rcu() on delete

   - Improve bridge handling of VLAN FDB, storing a single entry per
     bridge instead of one entry per port; this makes the dump order of
     magnitude faster on large switches

   - Restore IP ID correctly for encapsulated packets at GSO
     segmentation time, allowing GRO to merge packets in more scenarios

   - Improve netfilter matching performance on large sets

   - Improve MPTCP receive path performance by leveraging recently
     introduced core infrastructure (skb deferral free) and adopting
     recent TCP autotuning changes

   - Allow bridges to redirect to a backup port when the bridge port is
     administratively down

   - Introduce MPTCP 'laminar' endpoint that con be used only once per
     connection and simplify common MPTCP setups

   - Add RCU safety to dst->dev, closing a lot of possible races

   - A significant crypto library API for SCTP, MPTCP and IPv6 SR,
     reducing code duplication

   - Supports pulling data from an skb frag into the linear area of an
     XDP buffer

  Things we sprinkled into general kernel code:

   - Generate netlink documentation from YAML using an integrated YAML
     parser

  Driver API:

   - Support using IPv6 Flow Label in Rx hash computation and RSS queue
     selection

   - Introduce API for fetching the DMA device for a given queue,
     allowing TCP zerocopy RX on more H/W setups

   - Make XDP helpers compatible with unreadable memory, allowing more
     easily building DevMem-enabled drivers with a unified XDP/skbs
     datapath

   - Add a new dedicated ethtool callback enabling drivers to provide
     the number of RX rings directly, improving efficiency and clarity
     in RX ring queries and RSS configuration

   - Introduce a burst period for the health reporter, allowing better
     handling of multiple errors due to the same root cause

   - Support for DPLL phase offset exponential moving average,
     controlling the average smoothing factor

  Device drivers:

   - Add a new Huawei driver for 3rd gen NIC (hinic3)

   - Add a new SpacemiT driver for K1 ethernet MAC

   - Add a generic abstraction for shared memory communication
     devices (dibps)

   - Ethernet high-speed NICs:
      - nVidia/Mellanox:
         - Use multiple per-queue doorbell, to avoid MMIO contention
           issues
         - support adjacent functions, allowing them to delegate their
           SR-IOV VFs to sibling PFs
         - support RSS for IPSec offload
         - support exposing raw cycle counters in PTP and mlx5
         - support for disabling host PFs.
      - Intel (100G, ice, idpf):
         - ice: support for SRIOV VFs over an Active-Active link
           aggregate
         - ice: support for firmware logging via debugfs
         - ice: support for Earliest TxTime First (ETF) hardware offload
         - idpf: support basic XDP functionalities and XSk
      - Broadcom (bnxt):
         - support Hyper-V VF ID
         - dynamic SRIOV resource allocations for RoCE
      - Meta (fbnic):
         - support queue API, zero-copy Rx and Tx
         - support basic XDP functionalities
         - devlink health support for FW crashes and OTP mem corruptions
         - expand hardware stats coverage to FEC, PHY, and Pause
      - Wangxun:
         - support ethtool coalesce options
         - support for multiple RSS contexts

   - Ethernet virtual:
      - Macsec:
         - replace custom netlink attribute checks with policy-level
           checks
      - Bonding:
         - support aggregator selection based on port priority
      - Microsoft vNIC:
         - use page pool fragments for RX buffers instead of full pages
           to improve memory efficiency

   - Ethernet NICs consumer, and embedded:
      - Qualcomm: support Ethernet function for IPQ9574 SoC
      - Airoha: implement wlan offloading via NPU
      - Freescale
         - enetc: add NETC timer PTP driver and add PTP support
         - fec: enable the Jumbo frame support for i.MX8QM
      - Renesas (R-Car S4):
         - support HW offloading for layer 2 switching
         - support for RZ/{T2H, N2H} SoCs
      - Cadence (macb): support TAPRIO traffic scheduling
      - TI:
         - support for Gigabit ICSS ethernet SoC (icssm-prueth)
      - Synopsys (stmmac): a lot of cleanups

   - Ethernet PHYs:
      - Support 10g-qxgmi phy-mode for AQR412C, Felix DSA and Lynx PCS
        driver
      - Support bcm63268 GPHY power control
      - Support for Micrel lan8842 PHY and PTP
      - Support for Aquantia AQR412 and AQR115

   - CAN:
      - a large CAN-XL preparation work
      - reorganize raw_sock and uniqframe struct to minimize memory
        usage
      - rcar_canfd: update the CAN-FD handling

   - WiFi:
      - extended Neighbor Awareness Networking (NAN) support
      - S1G channel representation cleanup
      - improve S1G support

   - WiFi drivers:
      - Intel (iwlwifi):
         - major refactor and cleanup
      - Broadcom (brcm80211):
         - support for AP isolation
      - RealTek (rtw88/89) rtw88/89:
         - preparation work for RTL8922DE support
      - MediaTek (mt76):
         - HW restart improvements
         - MLO support
      - Qualcomm/Atheros (ath10k):
         - GTK rekey fixes

   - Bluetooth drivers:
      - btusb: support for several new IDs for MT7925
      - btintel: support for BlazarIW core
      - btintel_pcie: support for _suspend() / _resume()
      - btintel_pcie: support for Scorpious, Panther Lake-H484 IDs"

* tag 'net-next-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1536 commits)
  net: stmmac: Add support for Allwinner A523 GMAC200
  dt-bindings: net: sun8i-emac: Add A523 GMAC200 compatible
  Revert "Documentation: net: add flow control guide and document ethtool API"
  octeontx2-pf: fix bitmap leak
  octeontx2-vf: fix bitmap leak
  net/mlx5e: Use extack in set rxfh callback
  net/mlx5e: Introduce mlx5e_rss_params for RSS configuration
  net/mlx5e: Introduce mlx5e_rss_init_params
  net/mlx5e: Remove unused mdev param from RSS indir init
  net/mlx5: Improve QoS error messages with actual depth values
  net/mlx5e: Prevent entering switchdev mode with inconsistent netns
  net/mlx5: HWS, Generalize complex matchers
  net/mlx5: Improve write-combining test reliability for ARM64 Grace CPUs
  selftests/net: add tcp_port_share to .gitignore
  Revert "net/mlx5e: Update and set Xon/Xoff upon MTU set"
  net: add NUMA awareness to skb_attempt_defer_free()
  net: use llist for sd->defer_list
  net: make softnet_data.defer_count an atomic
  selftests: drv-net: psp: add tests for destroying devices
  selftests: drv-net: psp: add test for auto-adjusting TCP MSS
  ...

1 files changed, 0 insertions, 425 deletions

diff --git a/net/smc/smc_loopback.c b/net/smc/smc_loopback.c
deleted file mode 100644
index 77cc1c6dc3e9..000000000000
--- a/net/smc/smc_loopback.c
+++ /dev/null
@@ -1,425 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- *  Shared Memory Communications Direct over loopback-ism device.
- *
- *  Functions for loopback-ism device.
- *
- *  Copyright (c) 2024, Alibaba Inc.
- *
- *  Author: Wen Gu <guwen@linux.alibaba.com>
- *          Tony Lu <tonylu@linux.alibaba.com>
- *
- */
-
-#include <linux/device.h>
-#include <linux/types.h>
-#include <net/smc.h>
-
-#include "smc_cdc.h"
-#include "smc_ism.h"
-#include "smc_loopback.h"
-
-#define SMC_LO_V2_CAPABLE	0x1 /* loopback-ism acts as ISMv2 */
-#define SMC_LO_SUPPORT_NOCOPY	0x1
-#define SMC_DMA_ADDR_INVALID	(~(dma_addr_t)0)
-
-static const char smc_lo_dev_name[] = "loopback-ism";
-static struct smc_lo_dev *lo_dev;
-
-static void smc_lo_generate_ids(struct smc_lo_dev *ldev)
-{
-	struct smcd_gid *lgid = &ldev->local_gid;
-	uuid_t uuid;
-
-	uuid_gen(&uuid);
-	memcpy(&lgid->gid, &uuid, sizeof(lgid->gid));
-	memcpy(&lgid->gid_ext, (u8 *)&uuid + sizeof(lgid->gid),
-	       sizeof(lgid->gid_ext));
-
-	ldev->chid = SMC_LO_RESERVED_CHID;
-}
-
-static int smc_lo_query_rgid(struct smcd_dev *smcd, struct smcd_gid *rgid,
-			     u32 vid_valid, u32 vid)
-{
-	struct smc_lo_dev *ldev = smcd->priv;
-
-	/* rgid should be the same as lgid */
-	if (!ldev || rgid->gid != ldev->local_gid.gid ||
-	    rgid->gid_ext != ldev->local_gid.gid_ext)
-		return -ENETUNREACH;
-	return 0;
-}
-
-static int smc_lo_register_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb,
-			       void *client_priv)
-{
-	struct smc_lo_dmb_node *dmb_node, *tmp_node;
-	struct smc_lo_dev *ldev = smcd->priv;
-	struct folio *folio;
-	int sba_idx, rc;
-
-	/* check space for new dmb */
-	for_each_clear_bit(sba_idx, ldev->sba_idx_mask, SMC_LO_MAX_DMBS) {
-		if (!test_and_set_bit(sba_idx, ldev->sba_idx_mask))
-			break;
-	}
-	if (sba_idx == SMC_LO_MAX_DMBS)
-		return -ENOSPC;
-
-	dmb_node = kzalloc(sizeof(*dmb_node), GFP_KERNEL);
-	if (!dmb_node) {
-		rc = -ENOMEM;
-		goto err_bit;
-	}
-
-	dmb_node->sba_idx = sba_idx;
-	dmb_node->len = dmb->dmb_len;
-
-	/* not critical; fail under memory pressure and fallback to TCP */
-	folio = folio_alloc(GFP_KERNEL | __GFP_NOWARN | __GFP_NOMEMALLOC |
-			    __GFP_NORETRY | __GFP_ZERO,
-			    get_order(dmb_node->len));
-	if (!folio) {
-		rc = -ENOMEM;
-		goto err_node;
-	}
-	dmb_node->cpu_addr = folio_address(folio);
-	dmb_node->dma_addr = SMC_DMA_ADDR_INVALID;
-	refcount_set(&dmb_node->refcnt, 1);
-
-again:
-	/* add new dmb into hash table */
-	get_random_bytes(&dmb_node->token, sizeof(dmb_node->token));
-	write_lock_bh(&ldev->dmb_ht_lock);
-	hash_for_each_possible(ldev->dmb_ht, tmp_node, list, dmb_node->token) {
-		if (tmp_node->token == dmb_node->token) {
-			write_unlock_bh(&ldev->dmb_ht_lock);
-			goto again;
-		}
-	}
-	hash_add(ldev->dmb_ht, &dmb_node->list, dmb_node->token);
-	write_unlock_bh(&ldev->dmb_ht_lock);
-	atomic_inc(&ldev->dmb_cnt);
-
-	dmb->sba_idx = dmb_node->sba_idx;
-	dmb->dmb_tok = dmb_node->token;
-	dmb->cpu_addr = dmb_node->cpu_addr;
-	dmb->dma_addr = dmb_node->dma_addr;
-	dmb->dmb_len = dmb_node->len;
-
-	return 0;
-
-err_node:
-	kfree(dmb_node);
-err_bit:
-	clear_bit(sba_idx, ldev->sba_idx_mask);
-	return rc;
-}
-
-static void __smc_lo_unregister_dmb(struct smc_lo_dev *ldev,
-				    struct smc_lo_dmb_node *dmb_node)
-{
-	/* remove dmb from hash table */
-	write_lock_bh(&ldev->dmb_ht_lock);
-	hash_del(&dmb_node->list);
-	write_unlock_bh(&ldev->dmb_ht_lock);
-
-	clear_bit(dmb_node->sba_idx, ldev->sba_idx_mask);
-	folio_put(virt_to_folio(dmb_node->cpu_addr));
-	kfree(dmb_node);
-
-	if (atomic_dec_and_test(&ldev->dmb_cnt))
-		wake_up(&ldev->ldev_release);
-}
-
-static int smc_lo_unregister_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb)
-{
-	struct smc_lo_dmb_node *dmb_node = NULL, *tmp_node;
-	struct smc_lo_dev *ldev = smcd->priv;
-
-	/* find dmb from hash table */
-	read_lock_bh(&ldev->dmb_ht_lock);
-	hash_for_each_possible(ldev->dmb_ht, tmp_node, list, dmb->dmb_tok) {
-		if (tmp_node->token == dmb->dmb_tok) {
-			dmb_node = tmp_node;
-			break;
-		}
-	}
-	if (!dmb_node) {
-		read_unlock_bh(&ldev->dmb_ht_lock);
-		return -EINVAL;
-	}
-	read_unlock_bh(&ldev->dmb_ht_lock);
-
-	if (refcount_dec_and_test(&dmb_node->refcnt))
-		__smc_lo_unregister_dmb(ldev, dmb_node);
-	return 0;
-}
-
-static int smc_lo_support_dmb_nocopy(struct smcd_dev *smcd)
-{
-	return SMC_LO_SUPPORT_NOCOPY;
-}
-
-static int smc_lo_attach_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb)
-{
-	struct smc_lo_dmb_node *dmb_node = NULL, *tmp_node;
-	struct smc_lo_dev *ldev = smcd->priv;
-
-	/* find dmb_node according to dmb->dmb_tok */
-	read_lock_bh(&ldev->dmb_ht_lock);
-	hash_for_each_possible(ldev->dmb_ht, tmp_node, list, dmb->dmb_tok) {
-		if (tmp_node->token == dmb->dmb_tok) {
-			dmb_node = tmp_node;
-			break;
-		}
-	}
-	if (!dmb_node) {
-		read_unlock_bh(&ldev->dmb_ht_lock);
-		return -EINVAL;
-	}
-	read_unlock_bh(&ldev->dmb_ht_lock);
-
-	if (!refcount_inc_not_zero(&dmb_node->refcnt))
-		/* the dmb is being unregistered, but has
-		 * not been removed from the hash table.
-		 */
-		return -EINVAL;
-
-	/* provide dmb information */
-	dmb->sba_idx = dmb_node->sba_idx;
-	dmb->dmb_tok = dmb_node->token;
-	dmb->cpu_addr = dmb_node->cpu_addr;
-	dmb->dma_addr = dmb_node->dma_addr;
-	dmb->dmb_len = dmb_node->len;
-	return 0;
-}
-
-static int smc_lo_detach_dmb(struct smcd_dev *smcd, u64 token)
-{
-	struct smc_lo_dmb_node *dmb_node = NULL, *tmp_node;
-	struct smc_lo_dev *ldev = smcd->priv;
-
-	/* find dmb_node according to dmb->dmb_tok */
-	read_lock_bh(&ldev->dmb_ht_lock);
-	hash_for_each_possible(ldev->dmb_ht, tmp_node, list, token) {
-		if (tmp_node->token == token) {
-			dmb_node = tmp_node;
-			break;
-		}
-	}
-	if (!dmb_node) {
-		read_unlock_bh(&ldev->dmb_ht_lock);
-		return -EINVAL;
-	}
-	read_unlock_bh(&ldev->dmb_ht_lock);
-
-	if (refcount_dec_and_test(&dmb_node->refcnt))
-		__smc_lo_unregister_dmb(ldev, dmb_node);
-	return 0;
-}
-
-static int smc_lo_move_data(struct smcd_dev *smcd, u64 dmb_tok,
-			    unsigned int idx, bool sf, unsigned int offset,
-			    void *data, unsigned int size)
-{
-	struct smc_lo_dmb_node *rmb_node = NULL, *tmp_node;
-	struct smc_lo_dev *ldev = smcd->priv;
-	struct smc_connection *conn;
-
-	if (!sf)
-		/* since sndbuf is merged with peer DMB, there is
-		 * no need to copy data from sndbuf to peer DMB.
-		 */
-		return 0;
-
-	read_lock_bh(&ldev->dmb_ht_lock);
-	hash_for_each_possible(ldev->dmb_ht, tmp_node, list, dmb_tok) {
-		if (tmp_node->token == dmb_tok) {
-			rmb_node = tmp_node;
-			break;
-		}
-	}
-	if (!rmb_node) {
-		read_unlock_bh(&ldev->dmb_ht_lock);
-		return -EINVAL;
-	}
-	memcpy((char *)rmb_node->cpu_addr + offset, data, size);
-	read_unlock_bh(&ldev->dmb_ht_lock);
-
-	conn = smcd->conn[rmb_node->sba_idx];
-	if (!conn || conn->killed)
-		return -EPIPE;
-	tasklet_schedule(&conn->rx_tsklet);
-	return 0;
-}
-
-static void smc_lo_get_local_gid(struct smcd_dev *smcd,
-				 struct smcd_gid *smcd_gid)
-{
-	struct smc_lo_dev *ldev = smcd->priv;
-
-	smcd_gid->gid = ldev->local_gid.gid;
-	smcd_gid->gid_ext = ldev->local_gid.gid_ext;
-}
-
-static u16 smc_lo_get_chid(struct smcd_dev *smcd)
-{
-	return ((struct smc_lo_dev *)smcd->priv)->chid;
-}
-
-static struct device *smc_lo_get_dev(struct smcd_dev *smcd)
-{
-	return &((struct smc_lo_dev *)smcd->priv)->dev;
-}
-
-static const struct smcd_ops lo_ops = {
-	.query_remote_gid = smc_lo_query_rgid,
-	.register_dmb = smc_lo_register_dmb,
-	.unregister_dmb = smc_lo_unregister_dmb,
-	.support_dmb_nocopy = smc_lo_support_dmb_nocopy,
-	.attach_dmb = smc_lo_attach_dmb,
-	.detach_dmb = smc_lo_detach_dmb,
-	.add_vlan_id		= NULL,
-	.del_vlan_id		= NULL,
-	.set_vlan_required	= NULL,
-	.reset_vlan_required	= NULL,
-	.signal_event		= NULL,
-	.move_data = smc_lo_move_data,
-	.get_local_gid = smc_lo_get_local_gid,
-	.get_chid = smc_lo_get_chid,
-	.get_dev = smc_lo_get_dev,
-};
-
-static struct smcd_dev *smcd_lo_alloc_dev(const struct smcd_ops *ops,
-					  int max_dmbs)
-{
-	struct smcd_dev *smcd;
-
-	smcd = kzalloc(sizeof(*smcd), GFP_KERNEL);
-	if (!smcd)
-		return NULL;
-
-	smcd->conn = kcalloc(max_dmbs, sizeof(struct smc_connection *),
-			     GFP_KERNEL);
-	if (!smcd->conn)
-		goto out_smcd;
-
-	smcd->ops = ops;
-
-	spin_lock_init(&smcd->lock);
-	spin_lock_init(&smcd->lgr_lock);
-	INIT_LIST_HEAD(&smcd->vlan);
-	INIT_LIST_HEAD(&smcd->lgr_list);
-	init_waitqueue_head(&smcd->lgrs_deleted);
-	return smcd;
-
-out_smcd:
-	kfree(smcd);
-	return NULL;
-}
-
-static int smcd_lo_register_dev(struct smc_lo_dev *ldev)
-{
-	struct smcd_dev *smcd;
-
-	smcd = smcd_lo_alloc_dev(&lo_ops, SMC_LO_MAX_DMBS);
-	if (!smcd)
-		return -ENOMEM;
-	ldev->smcd = smcd;
-	smcd->priv = ldev;
-	smc_ism_set_v2_capable();
-	mutex_lock(&smcd_dev_list.mutex);
-	list_add(&smcd->list, &smcd_dev_list.list);
-	mutex_unlock(&smcd_dev_list.mutex);
-	pr_warn_ratelimited("smc: adding smcd device %s\n",
-			    dev_name(&ldev->dev));
-	return 0;
-}
-
-static void smcd_lo_unregister_dev(struct smc_lo_dev *ldev)
-{
-	struct smcd_dev *smcd = ldev->smcd;
-
-	pr_warn_ratelimited("smc: removing smcd device %s\n",
-			    dev_name(&ldev->dev));
-	smcd->going_away = 1;
-	smc_smcd_terminate_all(smcd);
-	mutex_lock(&smcd_dev_list.mutex);
-	list_del_init(&smcd->list);
-	mutex_unlock(&smcd_dev_list.mutex);
-	kfree(smcd->conn);
-	kfree(smcd);
-}
-
-static int smc_lo_dev_init(struct smc_lo_dev *ldev)
-{
-	smc_lo_generate_ids(ldev);
-	rwlock_init(&ldev->dmb_ht_lock);
-	hash_init(ldev->dmb_ht);
-	atomic_set(&ldev->dmb_cnt, 0);
-	init_waitqueue_head(&ldev->ldev_release);
-
-	return smcd_lo_register_dev(ldev);
-}
-
-static void smc_lo_dev_exit(struct smc_lo_dev *ldev)
-{
-	smcd_lo_unregister_dev(ldev);
-	if (atomic_read(&ldev->dmb_cnt))
-		wait_event(ldev->ldev_release, !atomic_read(&ldev->dmb_cnt));
-}
-
-static void smc_lo_dev_release(struct device *dev)
-{
-	struct smc_lo_dev *ldev =
-		container_of(dev, struct smc_lo_dev, dev);
-
-	kfree(ldev);
-}
-
-static int smc_lo_dev_probe(void)
-{
-	struct smc_lo_dev *ldev;
-	int ret;
-
-	ldev = kzalloc(sizeof(*ldev), GFP_KERNEL);
-	if (!ldev)
-		return -ENOMEM;
-
-	ldev->dev.parent = NULL;
-	ldev->dev.release = smc_lo_dev_release;
-	device_initialize(&ldev->dev);
-	dev_set_name(&ldev->dev, smc_lo_dev_name);
-
-	ret = smc_lo_dev_init(ldev);
-	if (ret)
-		goto free_dev;
-
-	lo_dev = ldev; /* global loopback device */
-	return 0;
-
-free_dev:
-	put_device(&ldev->dev);
-	return ret;
-}
-
-static void smc_lo_dev_remove(void)
-{
-	if (!lo_dev)
-		return;
-
-	smc_lo_dev_exit(lo_dev);
-	put_device(&lo_dev->dev); /* device_initialize in smc_lo_dev_probe */
-}
-
-int smc_loopback_init(void)
-{
-	return smc_lo_dev_probe();
-}
-
-void smc_loopback_exit(void)
-{
-	smc_lo_dev_remove();
-}