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, 640 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/dev.c b/drivers/net/ethernet/mellanox/mlx5/core/dev.c
new file mode 100644
index 000000000..445fe30c3
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/dev.c
@@ -0,0 +1,640 @@
+/*
+ * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/mlx5/driver.h>
+#include <linux/mlx5/eswitch.h>
+#include <linux/mlx5/mlx5_ifc_vdpa.h>
+#include <linux/mlx5/vport.h>
+#include "mlx5_core.h"
+
+/* intf dev list mutex */
+static DEFINE_MUTEX(mlx5_intf_mutex);
+static DEFINE_IDA(mlx5_adev_ida);
+
+static bool is_eth_rep_supported(struct mlx5_core_dev *dev)
+{
+	if (!IS_ENABLED(CONFIG_MLX5_ESWITCH))
+		return false;
+
+	if (!MLX5_ESWITCH_MANAGER(dev))
+		return false;
+
+	if (!is_mdev_switchdev_mode(dev))
+		return false;
+
+	return true;
+}
+
+bool mlx5_eth_supported(struct mlx5_core_dev *dev)
+{
+	if (!IS_ENABLED(CONFIG_MLX5_CORE_EN))
+		return false;
+
+	if (mlx5_core_is_management_pf(dev))
+		return false;
+
+	if (MLX5_CAP_GEN(dev, port_type) != MLX5_CAP_PORT_TYPE_ETH)
+		return false;
+
+	if (!MLX5_CAP_GEN(dev, eth_net_offloads)) {
+		mlx5_core_warn(dev, "Missing eth_net_offloads capability\n");
+		return false;
+	}
+
+	if (!MLX5_CAP_GEN(dev, nic_flow_table)) {
+		mlx5_core_warn(dev, "Missing nic_flow_table capability\n");
+		return false;
+	}
+
+	if (!MLX5_CAP_ETH(dev, csum_cap)) {
+		mlx5_core_warn(dev, "Missing csum_cap capability\n");
+		return false;
+	}
+
+	if (!MLX5_CAP_ETH(dev, max_lso_cap)) {
+		mlx5_core_warn(dev, "Missing max_lso_cap capability\n");
+		return false;
+	}
+
+	if (!MLX5_CAP_ETH(dev, vlan_cap)) {
+		mlx5_core_warn(dev, "Missing vlan_cap capability\n");
+		return false;
+	}
+
+	if (!MLX5_CAP_ETH(dev, rss_ind_tbl_cap)) {
+		mlx5_core_warn(dev, "Missing rss_ind_tbl_cap capability\n");
+		return false;
+	}
+
+	if (MLX5_CAP_FLOWTABLE(dev,
+			       flow_table_properties_nic_receive.max_ft_level) < 3) {
+		mlx5_core_warn(dev, "max_ft_level < 3\n");
+		return false;
+	}
+
+	if (!MLX5_CAP_ETH(dev, self_lb_en_modifiable))
+		mlx5_core_warn(dev, "Self loop back prevention is not supported\n");
+	if (!MLX5_CAP_GEN(dev, cq_moderation))
+		mlx5_core_warn(dev, "CQ moderation is not supported\n");
+
+	return true;
+}
+
+static bool is_eth_enabled(struct mlx5_core_dev *dev)
+{
+	union devlink_param_value val;
+	int err;
+
+	err = devl_param_driverinit_value_get(priv_to_devlink(dev),
+					      DEVLINK_PARAM_GENERIC_ID_ENABLE_ETH,
+					      &val);
+	return err ? false : val.vbool;
+}
+
+bool mlx5_vnet_supported(struct mlx5_core_dev *dev)
+{
+	if (!IS_ENABLED(CONFIG_MLX5_VDPA_NET))
+		return false;
+
+	if (mlx5_core_is_pf(dev))
+		return false;
+
+	if (!(MLX5_CAP_GEN_64(dev, general_obj_types) &
+	      MLX5_GENERAL_OBJ_TYPES_CAP_VIRTIO_NET_Q))
+		return false;
+
+	if (!(MLX5_CAP_DEV_VDPA_EMULATION(dev, event_mode) &
+	      MLX5_VIRTIO_Q_EVENT_MODE_QP_MODE))
+		return false;
+
+	if (!MLX5_CAP_DEV_VDPA_EMULATION(dev, eth_frame_offload_type))
+		return false;
+
+	return true;
+}
+
+static bool is_vnet_enabled(struct mlx5_core_dev *dev)
+{
+	union devlink_param_value val;
+	int err;
+
+	err = devl_param_driverinit_value_get(priv_to_devlink(dev),
+					      DEVLINK_PARAM_GENERIC_ID_ENABLE_VNET,
+					      &val);
+	return err ? false : val.vbool;
+}
+
+static bool is_ib_rep_supported(struct mlx5_core_dev *dev)
+{
+	if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
+		return false;
+
+	if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV)
+		return false;
+
+	if (!is_eth_rep_supported(dev))
+		return false;
+
+	if (!MLX5_ESWITCH_MANAGER(dev))
+		return false;
+
+	if (!is_mdev_switchdev_mode(dev))
+		return false;
+
+	if (mlx5_core_mp_enabled(dev))
+		return false;
+
+	return true;
+}
+
+static bool is_mp_supported(struct mlx5_core_dev *dev)
+{
+	if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
+		return false;
+
+	if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV)
+		return false;
+
+	if (is_ib_rep_supported(dev))
+		return false;
+
+	if (MLX5_CAP_GEN(dev, port_type) != MLX5_CAP_PORT_TYPE_ETH)
+		return false;
+
+	if (!mlx5_core_is_mp_slave(dev))
+		return false;
+
+	return true;
+}
+
+bool mlx5_rdma_supported(struct mlx5_core_dev *dev)
+{
+	if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
+		return false;
+
+	if (mlx5_core_is_management_pf(dev))
+		return false;
+
+	if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV)
+		return false;
+
+	if (is_ib_rep_supported(dev))
+		return false;
+
+	if (is_mp_supported(dev))
+		return false;
+
+	return true;
+}
+
+static bool is_ib_enabled(struct mlx5_core_dev *dev)
+{
+	union devlink_param_value val;
+	int err;
+
+	err = devl_param_driverinit_value_get(priv_to_devlink(dev),
+					      DEVLINK_PARAM_GENERIC_ID_ENABLE_RDMA,
+					      &val);
+	return err ? false : val.vbool;
+}
+
+enum {
+	MLX5_INTERFACE_PROTOCOL_ETH,
+	MLX5_INTERFACE_PROTOCOL_ETH_REP,
+
+	MLX5_INTERFACE_PROTOCOL_IB,
+	MLX5_INTERFACE_PROTOCOL_IB_REP,
+	MLX5_INTERFACE_PROTOCOL_MPIB,
+
+	MLX5_INTERFACE_PROTOCOL_VNET,
+};
+
+static const struct mlx5_adev_device {
+	const char *suffix;
+	bool (*is_supported)(struct mlx5_core_dev *dev);
+	bool (*is_enabled)(struct mlx5_core_dev *dev);
+} mlx5_adev_devices[] = {
+	[MLX5_INTERFACE_PROTOCOL_VNET] = { .suffix = "vnet",
+					   .is_supported = &mlx5_vnet_supported,
+					   .is_enabled = &is_vnet_enabled },
+	[MLX5_INTERFACE_PROTOCOL_IB] = { .suffix = "rdma",
+					 .is_supported = &mlx5_rdma_supported,
+					 .is_enabled = &is_ib_enabled },
+	[MLX5_INTERFACE_PROTOCOL_ETH] = { .suffix = "eth",
+					  .is_supported = &mlx5_eth_supported,
+					  .is_enabled = &is_eth_enabled },
+	[MLX5_INTERFACE_PROTOCOL_ETH_REP] = { .suffix = "eth-rep",
+					   .is_supported = &is_eth_rep_supported },
+	[MLX5_INTERFACE_PROTOCOL_IB_REP] = { .suffix = "rdma-rep",
+					   .is_supported = &is_ib_rep_supported },
+	[MLX5_INTERFACE_PROTOCOL_MPIB] = { .suffix = "multiport",
+					   .is_supported = &is_mp_supported },
+};
+
+int mlx5_adev_idx_alloc(void)
+{
+	return ida_alloc(&mlx5_adev_ida, GFP_KERNEL);
+}
+
+void mlx5_adev_idx_free(int idx)
+{
+	ida_free(&mlx5_adev_ida, idx);
+}
+
+int mlx5_adev_init(struct mlx5_core_dev *dev)
+{
+	struct mlx5_priv *priv = &dev->priv;
+
+	priv->adev = kcalloc(ARRAY_SIZE(mlx5_adev_devices),
+			     sizeof(struct mlx5_adev *), GFP_KERNEL);
+	if (!priv->adev)
+		return -ENOMEM;
+
+	return 0;
+}
+
+void mlx5_adev_cleanup(struct mlx5_core_dev *dev)
+{
+	struct mlx5_priv *priv = &dev->priv;
+
+	kfree(priv->adev);
+}
+
+static void adev_release(struct device *dev)
+{
+	struct mlx5_adev *mlx5_adev =
+		container_of(dev, struct mlx5_adev, adev.dev);
+	struct mlx5_priv *priv = &mlx5_adev->mdev->priv;
+	int idx = mlx5_adev->idx;
+
+	kfree(mlx5_adev);
+	priv->adev[idx] = NULL;
+}
+
+static struct mlx5_adev *add_adev(struct mlx5_core_dev *dev, int idx)
+{
+	const char *suffix = mlx5_adev_devices[idx].suffix;
+	struct auxiliary_device *adev;
+	struct mlx5_adev *madev;
+	int ret;
+
+	madev = kzalloc(sizeof(*madev), GFP_KERNEL);
+	if (!madev)
+		return ERR_PTR(-ENOMEM);
+
+	adev = &madev->adev;
+	adev->id = dev->priv.adev_idx;
+	adev->name = suffix;
+	adev->dev.parent = dev->device;
+	adev->dev.release = adev_release;
+	madev->mdev = dev;
+	madev->idx = idx;
+
+	ret = auxiliary_device_init(adev);
+	if (ret) {
+		kfree(madev);
+		return ERR_PTR(ret);
+	}
+
+	ret = auxiliary_device_add(adev);
+	if (ret) {
+		auxiliary_device_uninit(adev);
+		return ERR_PTR(ret);
+	}
+	return madev;
+}
+
+static void del_adev(struct auxiliary_device *adev)
+{
+	auxiliary_device_delete(adev);
+	auxiliary_device_uninit(adev);
+}
+
+int mlx5_attach_device(struct mlx5_core_dev *dev)
+{
+	struct mlx5_priv *priv = &dev->priv;
+	struct auxiliary_device *adev;
+	struct auxiliary_driver *adrv;
+	int ret = 0, i;
+
+	devl_assert_locked(priv_to_devlink(dev));
+	mutex_lock(&mlx5_intf_mutex);
+	priv->flags &= ~MLX5_PRIV_FLAGS_DETACH;
+	for (i = 0; i < ARRAY_SIZE(mlx5_adev_devices); i++) {
+		if (!priv->adev[i]) {
+			bool is_supported = false;
+
+			if (mlx5_adev_devices[i].is_enabled) {
+				bool enabled;
+
+				enabled = mlx5_adev_devices[i].is_enabled(dev);
+				if (!enabled)
+					continue;
+			}
+
+			if (mlx5_adev_devices[i].is_supported)
+				is_supported = mlx5_adev_devices[i].is_supported(dev);
+
+			if (!is_supported)
+				continue;
+
+			priv->adev[i] = add_adev(dev, i);
+			if (IS_ERR(priv->adev[i])) {
+				ret = PTR_ERR(priv->adev[i]);
+				priv->adev[i] = NULL;
+			}
+		} else {
+			adev = &priv->adev[i]->adev;
+
+			/* Pay attention that this is not PCI driver that
+			 * mlx5_core_dev is connected, but auxiliary driver.
+			 */
+			if (!adev->dev.driver)
+				continue;
+			adrv = to_auxiliary_drv(adev->dev.driver);
+
+			if (adrv->resume)
+				ret = adrv->resume(adev);
+		}
+		if (ret) {
+			mlx5_core_warn(dev, "Device[%d] (%s) failed to load\n",
+				       i, mlx5_adev_devices[i].suffix);
+
+			break;
+		}
+	}
+	mutex_unlock(&mlx5_intf_mutex);
+	return ret;
+}
+
+void mlx5_detach_device(struct mlx5_core_dev *dev, bool suspend)
+{
+	struct mlx5_priv *priv = &dev->priv;
+	struct auxiliary_device *adev;
+	struct auxiliary_driver *adrv;
+	pm_message_t pm = {};
+	int i;
+
+	devl_assert_locked(priv_to_devlink(dev));
+	mutex_lock(&mlx5_intf_mutex);
+	for (i = ARRAY_SIZE(mlx5_adev_devices) - 1; i >= 0; i--) {
+		if (!priv->adev[i])
+			continue;
+
+		if (mlx5_adev_devices[i].is_enabled) {
+			bool enabled;
+
+			enabled = mlx5_adev_devices[i].is_enabled(dev);
+			if (!enabled)
+				goto skip_suspend;
+		}
+
+		adev = &priv->adev[i]->adev;
+		/* Auxiliary driver was unbind manually through sysfs */
+		if (!adev->dev.driver)
+			goto skip_suspend;
+
+		adrv = to_auxiliary_drv(adev->dev.driver);
+
+		if (adrv->suspend && suspend) {
+			adrv->suspend(adev, pm);
+			continue;
+		}
+
+skip_suspend:
+		del_adev(&priv->adev[i]->adev);
+		priv->adev[i] = NULL;
+	}
+	priv->flags |= MLX5_PRIV_FLAGS_DETACH;
+	mutex_unlock(&mlx5_intf_mutex);
+}
+
+int mlx5_register_device(struct mlx5_core_dev *dev)
+{
+	int ret;
+
+	devl_assert_locked(priv_to_devlink(dev));
+	mutex_lock(&mlx5_intf_mutex);
+	dev->priv.flags &= ~MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
+	ret = mlx5_rescan_drivers_locked(dev);
+	mutex_unlock(&mlx5_intf_mutex);
+	if (ret)
+		mlx5_unregister_device(dev);
+
+	return ret;
+}
+
+void mlx5_unregister_device(struct mlx5_core_dev *dev)
+{
+	devl_assert_locked(priv_to_devlink(dev));
+	mutex_lock(&mlx5_intf_mutex);
+	dev->priv.flags = MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
+	mlx5_rescan_drivers_locked(dev);
+	mutex_unlock(&mlx5_intf_mutex);
+}
+
+static int add_drivers(struct mlx5_core_dev *dev)
+{
+	struct mlx5_priv *priv = &dev->priv;
+	int i, ret = 0;
+
+	for (i = 0; i < ARRAY_SIZE(mlx5_adev_devices); i++) {
+		bool is_supported = false;
+
+		if (priv->adev[i])
+			continue;
+
+		if (mlx5_adev_devices[i].is_supported)
+			is_supported = mlx5_adev_devices[i].is_supported(dev);
+
+		if (!is_supported)
+			continue;
+
+		priv->adev[i] = add_adev(dev, i);
+		if (IS_ERR(priv->adev[i])) {
+			mlx5_core_warn(dev, "Device[%d] (%s) failed to load\n",
+				       i, mlx5_adev_devices[i].suffix);
+			/* We continue to rescan drivers and leave to the caller
+			 * to make decision if to release everything or continue.
+			 */
+			ret = PTR_ERR(priv->adev[i]);
+			priv->adev[i] = NULL;
+		}
+	}
+	return ret;
+}
+
+static void delete_drivers(struct mlx5_core_dev *dev)
+{
+	struct mlx5_priv *priv = &dev->priv;
+	bool delete_all;
+	int i;
+
+	delete_all = priv->flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
+
+	for (i = ARRAY_SIZE(mlx5_adev_devices) - 1; i >= 0; i--) {
+		bool is_supported = false;
+
+		if (!priv->adev[i])
+			continue;
+
+		if (mlx5_adev_devices[i].is_enabled) {
+			bool enabled;
+
+			enabled = mlx5_adev_devices[i].is_enabled(dev);
+			if (!enabled)
+				goto del_adev;
+		}
+
+		if (mlx5_adev_devices[i].is_supported && !delete_all)
+			is_supported = mlx5_adev_devices[i].is_supported(dev);
+
+		if (is_supported)
+			continue;
+
+del_adev:
+		del_adev(&priv->adev[i]->adev);
+		priv->adev[i] = NULL;
+	}
+}
+
+/* This function is used after mlx5_core_dev is reconfigured.
+ */
+int mlx5_rescan_drivers_locked(struct mlx5_core_dev *dev)
+{
+	struct mlx5_priv *priv = &dev->priv;
+
+	lockdep_assert_held(&mlx5_intf_mutex);
+	if (priv->flags & MLX5_PRIV_FLAGS_DETACH)
+		return 0;
+
+	delete_drivers(dev);
+	if (priv->flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV)
+		return 0;
+
+	return add_drivers(dev);
+}
+
+bool mlx5_same_hw_devs(struct mlx5_core_dev *dev, struct mlx5_core_dev *peer_dev)
+{
+	u64 fsystem_guid, psystem_guid;
+
+	fsystem_guid = mlx5_query_nic_system_image_guid(dev);
+	psystem_guid = mlx5_query_nic_system_image_guid(peer_dev);
+
+	return (fsystem_guid && psystem_guid && fsystem_guid == psystem_guid);
+}
+
+static u32 mlx5_gen_pci_id(const struct mlx5_core_dev *dev)
+{
+	return (u32)((pci_domain_nr(dev->pdev->bus) << 16) |
+		     (dev->pdev->bus->number << 8) |
+		     PCI_SLOT(dev->pdev->devfn));
+}
+
+static int _next_phys_dev(struct mlx5_core_dev *mdev,
+			  const struct mlx5_core_dev *curr)
+{
+	if (!mlx5_core_is_pf(mdev))
+		return 0;
+
+	if (mdev == curr)
+		return 0;
+
+	if (!mlx5_same_hw_devs(mdev, (struct mlx5_core_dev *)curr) &&
+	    mlx5_gen_pci_id(mdev) != mlx5_gen_pci_id(curr))
+		return 0;
+
+	return 1;
+}
+
+static void *pci_get_other_drvdata(struct device *this, struct device *other)
+{
+	if (this->driver != other->driver)
+		return NULL;
+
+	return pci_get_drvdata(to_pci_dev(other));
+}
+
+static int next_phys_dev_lag(struct device *dev, const void *data)
+{
+	struct mlx5_core_dev *mdev, *this = (struct mlx5_core_dev *)data;
+
+	mdev = pci_get_other_drvdata(this->device, dev);
+	if (!mdev)
+		return 0;
+
+	if (!MLX5_CAP_GEN(mdev, vport_group_manager) ||
+	    !MLX5_CAP_GEN(mdev, lag_master) ||
+	    (MLX5_CAP_GEN(mdev, num_lag_ports) > MLX5_MAX_PORTS ||
+	     MLX5_CAP_GEN(mdev, num_lag_ports) <= 1))
+		return 0;
+
+	return _next_phys_dev(mdev, data);
+}
+
+static struct mlx5_core_dev *mlx5_get_next_dev(struct mlx5_core_dev *dev,
+					       int (*match)(struct device *dev, const void *data))
+{
+	struct device *next;
+
+	if (!mlx5_core_is_pf(dev))
+		return NULL;
+
+	next = bus_find_device(&pci_bus_type, NULL, dev, match);
+	if (!next)
+		return NULL;
+
+	put_device(next);
+	return pci_get_drvdata(to_pci_dev(next));
+}
+
+/* Must be called with intf_mutex held */
+struct mlx5_core_dev *mlx5_get_next_phys_dev_lag(struct mlx5_core_dev *dev)
+{
+	lockdep_assert_held(&mlx5_intf_mutex);
+	return mlx5_get_next_dev(dev, &next_phys_dev_lag);
+}
+
+void mlx5_dev_list_lock(void)
+{
+	mutex_lock(&mlx5_intf_mutex);
+}
+void mlx5_dev_list_unlock(void)
+{
+	mutex_unlock(&mlx5_intf_mutex);
+}
+
+int mlx5_dev_list_trylock(void)
+{
+	return mutex_trylock(&mlx5_intf_mutex);
+}