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, 746 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlxsw/minimal.c b/drivers/net/ethernet/mellanox/mlxsw/minimal.c
new file mode 100644
index 000000000..6b56eadd7
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlxsw/minimal.c
@@ -0,0 +1,746 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/* Copyright (c) 2016-2019 Mellanox Technologies. All rights reserved */
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/types.h>
+
+#include "core.h"
+#include "core_env.h"
+#include "i2c.h"
+
+static const char mlxsw_m_driver_name[] = "mlxsw_minimal";
+
+#define MLXSW_M_FWREV_MINOR	2000
+#define MLXSW_M_FWREV_SUBMINOR	1886
+
+static const struct mlxsw_fw_rev mlxsw_m_fw_rev = {
+	.minor = MLXSW_M_FWREV_MINOR,
+	.subminor = MLXSW_M_FWREV_SUBMINOR,
+};
+
+struct mlxsw_m_port;
+
+struct mlxsw_m_line_card {
+	bool active;
+	int module_to_port[];
+};
+
+struct mlxsw_m {
+	struct mlxsw_m_port **ports;
+	struct mlxsw_core *core;
+	const struct mlxsw_bus_info *bus_info;
+	u8 base_mac[ETH_ALEN];
+	u8 max_ports;
+	u8 max_modules_per_slot; /* Maximum number of modules per-slot. */
+	u8 num_of_slots; /* Including the main board. */
+	struct mlxsw_m_line_card **line_cards;
+};
+
+struct mlxsw_m_port {
+	struct net_device *dev;
+	struct mlxsw_m *mlxsw_m;
+	u16 local_port;
+	u8 slot_index;
+	u8 module;
+	u8 module_offset;
+};
+
+static int mlxsw_m_base_mac_get(struct mlxsw_m *mlxsw_m)
+{
+	char spad_pl[MLXSW_REG_SPAD_LEN] = {0};
+	int err;
+
+	err = mlxsw_reg_query(mlxsw_m->core, MLXSW_REG(spad), spad_pl);
+	if (err)
+		return err;
+	mlxsw_reg_spad_base_mac_memcpy_from(spad_pl, mlxsw_m->base_mac);
+	return 0;
+}
+
+static int mlxsw_m_port_open(struct net_device *dev)
+{
+	struct mlxsw_m_port *mlxsw_m_port = netdev_priv(dev);
+	struct mlxsw_m *mlxsw_m = mlxsw_m_port->mlxsw_m;
+
+	return mlxsw_env_module_port_up(mlxsw_m->core, 0,
+					mlxsw_m_port->module);
+}
+
+static int mlxsw_m_port_stop(struct net_device *dev)
+{
+	struct mlxsw_m_port *mlxsw_m_port = netdev_priv(dev);
+	struct mlxsw_m *mlxsw_m = mlxsw_m_port->mlxsw_m;
+
+	mlxsw_env_module_port_down(mlxsw_m->core, 0, mlxsw_m_port->module);
+	return 0;
+}
+
+static const struct net_device_ops mlxsw_m_port_netdev_ops = {
+	.ndo_open		= mlxsw_m_port_open,
+	.ndo_stop		= mlxsw_m_port_stop,
+};
+
+static void mlxsw_m_module_get_drvinfo(struct net_device *dev,
+				       struct ethtool_drvinfo *drvinfo)
+{
+	struct mlxsw_m_port *mlxsw_m_port = netdev_priv(dev);
+	struct mlxsw_m *mlxsw_m = mlxsw_m_port->mlxsw_m;
+
+	strscpy(drvinfo->driver, mlxsw_m->bus_info->device_kind,
+		sizeof(drvinfo->driver));
+	snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
+		 "%d.%d.%d",
+		 mlxsw_m->bus_info->fw_rev.major,
+		 mlxsw_m->bus_info->fw_rev.minor,
+		 mlxsw_m->bus_info->fw_rev.subminor);
+	strscpy(drvinfo->bus_info, mlxsw_m->bus_info->device_name,
+		sizeof(drvinfo->bus_info));
+}
+
+static int mlxsw_m_get_module_info(struct net_device *netdev,
+				   struct ethtool_modinfo *modinfo)
+{
+	struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev);
+	struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core;
+
+	return mlxsw_env_get_module_info(netdev, core,
+					 mlxsw_m_port->slot_index,
+					 mlxsw_m_port->module, modinfo);
+}
+
+static int
+mlxsw_m_get_module_eeprom(struct net_device *netdev, struct ethtool_eeprom *ee,
+			  u8 *data)
+{
+	struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev);
+	struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core;
+
+	return mlxsw_env_get_module_eeprom(netdev, core,
+					   mlxsw_m_port->slot_index,
+					   mlxsw_m_port->module, ee, data);
+}
+
+static int
+mlxsw_m_get_module_eeprom_by_page(struct net_device *netdev,
+				  const struct ethtool_module_eeprom *page,
+				  struct netlink_ext_ack *extack)
+{
+	struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev);
+	struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core;
+
+	return mlxsw_env_get_module_eeprom_by_page(core,
+						   mlxsw_m_port->slot_index,
+						   mlxsw_m_port->module,
+						   page, extack);
+}
+
+static int mlxsw_m_reset(struct net_device *netdev, u32 *flags)
+{
+	struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev);
+	struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core;
+
+	return mlxsw_env_reset_module(netdev, core, mlxsw_m_port->slot_index,
+				      mlxsw_m_port->module,
+				      flags);
+}
+
+static int
+mlxsw_m_get_module_power_mode(struct net_device *netdev,
+			      struct ethtool_module_power_mode_params *params,
+			      struct netlink_ext_ack *extack)
+{
+	struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev);
+	struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core;
+
+	return mlxsw_env_get_module_power_mode(core, mlxsw_m_port->slot_index,
+					       mlxsw_m_port->module,
+					       params, extack);
+}
+
+static int
+mlxsw_m_set_module_power_mode(struct net_device *netdev,
+			      const struct ethtool_module_power_mode_params *params,
+			      struct netlink_ext_ack *extack)
+{
+	struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev);
+	struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core;
+
+	return mlxsw_env_set_module_power_mode(core, mlxsw_m_port->slot_index,
+					       mlxsw_m_port->module,
+					       params->policy, extack);
+}
+
+static const struct ethtool_ops mlxsw_m_port_ethtool_ops = {
+	.get_drvinfo		= mlxsw_m_module_get_drvinfo,
+	.get_module_info	= mlxsw_m_get_module_info,
+	.get_module_eeprom	= mlxsw_m_get_module_eeprom,
+	.get_module_eeprom_by_page = mlxsw_m_get_module_eeprom_by_page,
+	.reset			= mlxsw_m_reset,
+	.get_module_power_mode	= mlxsw_m_get_module_power_mode,
+	.set_module_power_mode	= mlxsw_m_set_module_power_mode,
+};
+
+static int
+mlxsw_m_port_module_info_get(struct mlxsw_m *mlxsw_m, u16 local_port,
+			     u8 *p_module, u8 *p_width, u8 *p_slot_index)
+{
+	char pmlp_pl[MLXSW_REG_PMLP_LEN];
+	int err;
+
+	mlxsw_reg_pmlp_pack(pmlp_pl, local_port);
+	err = mlxsw_reg_query(mlxsw_m->core, MLXSW_REG(pmlp), pmlp_pl);
+	if (err)
+		return err;
+	*p_module = mlxsw_reg_pmlp_module_get(pmlp_pl, 0);
+	*p_width = mlxsw_reg_pmlp_width_get(pmlp_pl);
+	*p_slot_index = mlxsw_reg_pmlp_slot_index_get(pmlp_pl, 0);
+
+	return 0;
+}
+
+static int
+mlxsw_m_port_dev_addr_get(struct mlxsw_m_port *mlxsw_m_port)
+{
+	struct mlxsw_m *mlxsw_m = mlxsw_m_port->mlxsw_m;
+	char ppad_pl[MLXSW_REG_PPAD_LEN];
+	u8 addr[ETH_ALEN];
+	int err;
+
+	mlxsw_reg_ppad_pack(ppad_pl, false, 0);
+	err = mlxsw_reg_query(mlxsw_m->core, MLXSW_REG(ppad), ppad_pl);
+	if (err)
+		return err;
+	mlxsw_reg_ppad_mac_memcpy_from(ppad_pl, addr);
+	eth_hw_addr_gen(mlxsw_m_port->dev, addr, mlxsw_m_port->module + 1 +
+			mlxsw_m_port->module_offset);
+	return 0;
+}
+
+static bool mlxsw_m_port_created(struct mlxsw_m *mlxsw_m, u16 local_port)
+{
+	return mlxsw_m->ports[local_port];
+}
+
+static int
+mlxsw_m_port_create(struct mlxsw_m *mlxsw_m, u16 local_port, u8 slot_index,
+		    u8 module)
+{
+	struct mlxsw_m_port *mlxsw_m_port;
+	struct net_device *dev;
+	int err;
+
+	err = mlxsw_core_port_init(mlxsw_m->core, local_port, slot_index,
+				   module + 1, false, 0, false,
+				   0, mlxsw_m->base_mac,
+				   sizeof(mlxsw_m->base_mac));
+	if (err) {
+		dev_err(mlxsw_m->bus_info->dev, "Port %d: Failed to init core port\n",
+			local_port);
+		return err;
+	}
+
+	dev = alloc_etherdev(sizeof(struct mlxsw_m_port));
+	if (!dev) {
+		err = -ENOMEM;
+		goto err_alloc_etherdev;
+	}
+
+	SET_NETDEV_DEV(dev, mlxsw_m->bus_info->dev);
+	dev_net_set(dev, mlxsw_core_net(mlxsw_m->core));
+	mlxsw_m_port = netdev_priv(dev);
+	mlxsw_core_port_netdev_link(mlxsw_m->core, local_port,
+				    mlxsw_m_port, dev);
+	mlxsw_m_port->dev = dev;
+	mlxsw_m_port->mlxsw_m = mlxsw_m;
+	mlxsw_m_port->local_port = local_port;
+	mlxsw_m_port->module = module;
+	mlxsw_m_port->slot_index = slot_index;
+	/* Add module offset for line card. Offset for main board iz zero.
+	 * For line card in slot #n offset is calculated as (#n - 1)
+	 * multiplied by maximum modules number, which could be found on a line
+	 * card.
+	 */
+	mlxsw_m_port->module_offset = mlxsw_m_port->slot_index ?
+				      (mlxsw_m_port->slot_index - 1) *
+				      mlxsw_m->max_modules_per_slot : 0;
+
+	dev->netdev_ops = &mlxsw_m_port_netdev_ops;
+	dev->ethtool_ops = &mlxsw_m_port_ethtool_ops;
+
+	err = mlxsw_m_port_dev_addr_get(mlxsw_m_port);
+	if (err) {
+		dev_err(mlxsw_m->bus_info->dev, "Port %d: Unable to get port mac address\n",
+			mlxsw_m_port->local_port);
+		goto err_dev_addr_get;
+	}
+
+	netif_carrier_off(dev);
+	mlxsw_m->ports[local_port] = mlxsw_m_port;
+	err = register_netdev(dev);
+	if (err) {
+		dev_err(mlxsw_m->bus_info->dev, "Port %d: Failed to register netdev\n",
+			mlxsw_m_port->local_port);
+		goto err_register_netdev;
+	}
+
+	return 0;
+
+err_register_netdev:
+	mlxsw_m->ports[local_port] = NULL;
+err_dev_addr_get:
+	free_netdev(dev);
+err_alloc_etherdev:
+	mlxsw_core_port_fini(mlxsw_m->core, local_port);
+	return err;
+}
+
+static void mlxsw_m_port_remove(struct mlxsw_m *mlxsw_m, u16 local_port)
+{
+	struct mlxsw_m_port *mlxsw_m_port = mlxsw_m->ports[local_port];
+
+	unregister_netdev(mlxsw_m_port->dev); /* This calls ndo_stop */
+	mlxsw_m->ports[local_port] = NULL;
+	free_netdev(mlxsw_m_port->dev);
+	mlxsw_core_port_fini(mlxsw_m->core, local_port);
+}
+
+static int*
+mlxsw_m_port_mapping_get(struct mlxsw_m *mlxsw_m, u8 slot_index, u8 module)
+{
+	return &mlxsw_m->line_cards[slot_index]->module_to_port[module];
+}
+
+static int mlxsw_m_port_module_map(struct mlxsw_m *mlxsw_m, u16 local_port,
+				   u8 *last_module)
+{
+	unsigned int max_ports = mlxsw_core_max_ports(mlxsw_m->core);
+	u8 module, width, slot_index;
+	int *module_to_port;
+	int err;
+
+	/* Fill out to local port mapping array */
+	err = mlxsw_m_port_module_info_get(mlxsw_m, local_port, &module,
+					   &width, &slot_index);
+	if (err)
+		return err;
+
+	/* Skip if line card has been already configured */
+	if (mlxsw_m->line_cards[slot_index]->active)
+		return 0;
+	if (!width)
+		return 0;
+	/* Skip, if port belongs to the cluster */
+	if (module == *last_module)
+		return 0;
+	*last_module = module;
+
+	if (WARN_ON_ONCE(module >= max_ports))
+		return -EINVAL;
+	mlxsw_env_module_port_map(mlxsw_m->core, slot_index, module);
+	module_to_port = mlxsw_m_port_mapping_get(mlxsw_m, slot_index, module);
+	*module_to_port = local_port;
+
+	return 0;
+}
+
+static void
+mlxsw_m_port_module_unmap(struct mlxsw_m *mlxsw_m, u8 slot_index, u8 module)
+{
+	int *module_to_port = mlxsw_m_port_mapping_get(mlxsw_m, slot_index,
+						       module);
+	*module_to_port = -1;
+	mlxsw_env_module_port_unmap(mlxsw_m->core, slot_index, module);
+}
+
+static int mlxsw_m_linecards_init(struct mlxsw_m *mlxsw_m)
+{
+	unsigned int max_ports = mlxsw_core_max_ports(mlxsw_m->core);
+	char mgpir_pl[MLXSW_REG_MGPIR_LEN];
+	u8 num_of_modules;
+	int i, j, err;
+
+	mlxsw_reg_mgpir_pack(mgpir_pl, 0);
+	err = mlxsw_reg_query(mlxsw_m->core, MLXSW_REG(mgpir), mgpir_pl);
+	if (err)
+		return err;
+
+	mlxsw_reg_mgpir_unpack(mgpir_pl, NULL, NULL, NULL, &num_of_modules,
+			       &mlxsw_m->num_of_slots);
+	/* If the system is modular, get the maximum number of modules per-slot.
+	 * Otherwise, get the maximum number of modules on the main board.
+	 */
+	if (mlxsw_m->num_of_slots)
+		mlxsw_m->max_modules_per_slot =
+			mlxsw_reg_mgpir_max_modules_per_slot_get(mgpir_pl);
+	else
+		mlxsw_m->max_modules_per_slot = num_of_modules;
+	/* Add slot for main board. */
+	mlxsw_m->num_of_slots += 1;
+
+	mlxsw_m->ports = kcalloc(max_ports, sizeof(*mlxsw_m->ports),
+				 GFP_KERNEL);
+	if (!mlxsw_m->ports)
+		return -ENOMEM;
+
+	mlxsw_m->line_cards = kcalloc(mlxsw_m->num_of_slots,
+				      sizeof(*mlxsw_m->line_cards),
+				      GFP_KERNEL);
+	if (!mlxsw_m->line_cards) {
+		err = -ENOMEM;
+		goto err_kcalloc;
+	}
+
+	for (i = 0; i < mlxsw_m->num_of_slots; i++) {
+		mlxsw_m->line_cards[i] =
+			kzalloc(struct_size(mlxsw_m->line_cards[i],
+					    module_to_port,
+					    mlxsw_m->max_modules_per_slot),
+				GFP_KERNEL);
+		if (!mlxsw_m->line_cards[i]) {
+			err = -ENOMEM;
+			goto err_kmalloc_array;
+		}
+
+		/* Invalidate the entries of module to local port mapping array. */
+		for (j = 0; j < mlxsw_m->max_modules_per_slot; j++)
+			mlxsw_m->line_cards[i]->module_to_port[j] = -1;
+	}
+
+	return 0;
+
+err_kmalloc_array:
+	for (i--; i >= 0; i--)
+		kfree(mlxsw_m->line_cards[i]);
+err_kcalloc:
+	kfree(mlxsw_m->ports);
+	return err;
+}
+
+static void mlxsw_m_linecards_fini(struct mlxsw_m *mlxsw_m)
+{
+	int i = mlxsw_m->num_of_slots;
+
+	for (i--; i >= 0; i--)
+		kfree(mlxsw_m->line_cards[i]);
+	kfree(mlxsw_m->line_cards);
+	kfree(mlxsw_m->ports);
+}
+
+static void
+mlxsw_m_linecard_port_module_unmap(struct mlxsw_m *mlxsw_m, u8 slot_index)
+{
+	int i;
+
+	for (i = mlxsw_m->max_modules_per_slot - 1; i >= 0; i--) {
+		int *module_to_port;
+
+		module_to_port = mlxsw_m_port_mapping_get(mlxsw_m, slot_index, i);
+		if (*module_to_port > 0)
+			mlxsw_m_port_module_unmap(mlxsw_m, slot_index, i);
+	}
+}
+
+static int
+mlxsw_m_linecard_ports_create(struct mlxsw_m *mlxsw_m, u8 slot_index)
+{
+	int *module_to_port;
+	int i, err;
+
+	for (i = 0; i < mlxsw_m->max_modules_per_slot; i++) {
+		module_to_port = mlxsw_m_port_mapping_get(mlxsw_m, slot_index, i);
+		if (*module_to_port > 0) {
+			err = mlxsw_m_port_create(mlxsw_m, *module_to_port,
+						  slot_index, i);
+			if (err)
+				goto err_port_create;
+			/* Mark slot as active */
+			if (!mlxsw_m->line_cards[slot_index]->active)
+				mlxsw_m->line_cards[slot_index]->active = true;
+		}
+	}
+	return 0;
+
+err_port_create:
+	for (i--; i >= 0; i--) {
+		module_to_port = mlxsw_m_port_mapping_get(mlxsw_m, slot_index, i);
+		if (*module_to_port > 0 &&
+		    mlxsw_m_port_created(mlxsw_m, *module_to_port)) {
+			mlxsw_m_port_remove(mlxsw_m, *module_to_port);
+			/* Mark slot as inactive */
+			if (mlxsw_m->line_cards[slot_index]->active)
+				mlxsw_m->line_cards[slot_index]->active = false;
+		}
+	}
+	return err;
+}
+
+static void
+mlxsw_m_linecard_ports_remove(struct mlxsw_m *mlxsw_m, u8 slot_index)
+{
+	int i;
+
+	for (i = 0; i < mlxsw_m->max_modules_per_slot; i++) {
+		int *module_to_port = mlxsw_m_port_mapping_get(mlxsw_m,
+							       slot_index, i);
+
+		if (*module_to_port > 0 &&
+		    mlxsw_m_port_created(mlxsw_m, *module_to_port)) {
+			mlxsw_m_port_remove(mlxsw_m, *module_to_port);
+			mlxsw_m_port_module_unmap(mlxsw_m, slot_index, i);
+		}
+	}
+}
+
+static int mlxsw_m_ports_module_map(struct mlxsw_m *mlxsw_m)
+{
+	unsigned int max_ports = mlxsw_core_max_ports(mlxsw_m->core);
+	u8 last_module = max_ports;
+	int i, err;
+
+	for (i = 1; i < max_ports; i++) {
+		err = mlxsw_m_port_module_map(mlxsw_m, i, &last_module);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
+static int mlxsw_m_ports_create(struct mlxsw_m *mlxsw_m)
+{
+	int err;
+
+	/* Fill out module to local port mapping array */
+	err = mlxsw_m_ports_module_map(mlxsw_m);
+	if (err)
+		goto err_ports_module_map;
+
+	/* Create port objects for each valid entry */
+	err = mlxsw_m_linecard_ports_create(mlxsw_m, 0);
+	if (err)
+		goto err_linecard_ports_create;
+
+	return 0;
+
+err_linecard_ports_create:
+err_ports_module_map:
+	mlxsw_m_linecard_port_module_unmap(mlxsw_m, 0);
+
+	return err;
+}
+
+static void mlxsw_m_ports_remove(struct mlxsw_m *mlxsw_m)
+{
+	mlxsw_m_linecard_ports_remove(mlxsw_m, 0);
+}
+
+static void
+mlxsw_m_ports_remove_selected(struct mlxsw_core *mlxsw_core,
+			      bool (*selector)(void *priv, u16 local_port),
+			      void *priv)
+{
+	struct mlxsw_m *mlxsw_m = mlxsw_core_driver_priv(mlxsw_core);
+	struct mlxsw_linecard *linecard_priv = priv;
+	struct mlxsw_m_line_card *linecard;
+
+	linecard = mlxsw_m->line_cards[linecard_priv->slot_index];
+
+	if (WARN_ON(!linecard->active))
+		return;
+
+	mlxsw_m_linecard_ports_remove(mlxsw_m, linecard_priv->slot_index);
+	linecard->active = false;
+}
+
+static int mlxsw_m_fw_rev_validate(struct mlxsw_m *mlxsw_m)
+{
+	const struct mlxsw_fw_rev *rev = &mlxsw_m->bus_info->fw_rev;
+
+	/* Validate driver and FW are compatible.
+	 * Do not check major version, since it defines chip type, while
+	 * driver is supposed to support any type.
+	 */
+	if (mlxsw_core_fw_rev_minor_subminor_validate(rev, &mlxsw_m_fw_rev))
+		return 0;
+
+	dev_err(mlxsw_m->bus_info->dev, "The firmware version %d.%d.%d is incompatible with the driver (required >= %d.%d.%d)\n",
+		rev->major, rev->minor, rev->subminor, rev->major,
+		mlxsw_m_fw_rev.minor, mlxsw_m_fw_rev.subminor);
+
+	return -EINVAL;
+}
+
+static void
+mlxsw_m_got_active(struct mlxsw_core *mlxsw_core, u8 slot_index, void *priv)
+{
+	struct mlxsw_m_line_card *linecard;
+	struct mlxsw_m *mlxsw_m = priv;
+	int err;
+
+	linecard = mlxsw_m->line_cards[slot_index];
+	/* Skip if line card has been already configured during init */
+	if (linecard->active)
+		return;
+
+	/* Fill out module to local port mapping array */
+	err = mlxsw_m_ports_module_map(mlxsw_m);
+	if (err)
+		goto err_ports_module_map;
+
+	/* Create port objects for each valid entry */
+	err = mlxsw_m_linecard_ports_create(mlxsw_m, slot_index);
+	if (err) {
+		dev_err(mlxsw_m->bus_info->dev, "Failed to create port for line card at slot %d\n",
+			slot_index);
+		goto err_linecard_ports_create;
+	}
+
+	linecard->active = true;
+
+	return;
+
+err_linecard_ports_create:
+err_ports_module_map:
+	mlxsw_m_linecard_port_module_unmap(mlxsw_m, slot_index);
+}
+
+static void
+mlxsw_m_got_inactive(struct mlxsw_core *mlxsw_core, u8 slot_index, void *priv)
+{
+	struct mlxsw_m_line_card *linecard;
+	struct mlxsw_m *mlxsw_m = priv;
+
+	linecard = mlxsw_m->line_cards[slot_index];
+
+	if (WARN_ON(!linecard->active))
+		return;
+
+	mlxsw_m_linecard_ports_remove(mlxsw_m, slot_index);
+	linecard->active = false;
+}
+
+static struct mlxsw_linecards_event_ops mlxsw_m_event_ops = {
+	.got_active = mlxsw_m_got_active,
+	.got_inactive = mlxsw_m_got_inactive,
+};
+
+static int mlxsw_m_init(struct mlxsw_core *mlxsw_core,
+			const struct mlxsw_bus_info *mlxsw_bus_info,
+			struct netlink_ext_ack *extack)
+{
+	struct mlxsw_m *mlxsw_m = mlxsw_core_driver_priv(mlxsw_core);
+	int err;
+
+	mlxsw_m->core = mlxsw_core;
+	mlxsw_m->bus_info = mlxsw_bus_info;
+
+	err = mlxsw_m_fw_rev_validate(mlxsw_m);
+	if (err)
+		return err;
+
+	err = mlxsw_m_base_mac_get(mlxsw_m);
+	if (err) {
+		dev_err(mlxsw_m->bus_info->dev, "Failed to get base mac\n");
+		return err;
+	}
+
+	err = mlxsw_m_linecards_init(mlxsw_m);
+	if (err) {
+		dev_err(mlxsw_m->bus_info->dev, "Failed to create line cards\n");
+		return err;
+	}
+
+	err = mlxsw_linecards_event_ops_register(mlxsw_core,
+						 &mlxsw_m_event_ops, mlxsw_m);
+	if (err) {
+		dev_err(mlxsw_m->bus_info->dev, "Failed to register line cards operations\n");
+		goto linecards_event_ops_register;
+	}
+
+	err = mlxsw_m_ports_create(mlxsw_m);
+	if (err) {
+		dev_err(mlxsw_m->bus_info->dev, "Failed to create ports\n");
+		goto err_ports_create;
+	}
+
+	return 0;
+
+err_ports_create:
+	mlxsw_linecards_event_ops_unregister(mlxsw_core,
+					     &mlxsw_m_event_ops, mlxsw_m);
+linecards_event_ops_register:
+	mlxsw_m_linecards_fini(mlxsw_m);
+	return err;
+}
+
+static void mlxsw_m_fini(struct mlxsw_core *mlxsw_core)
+{
+	struct mlxsw_m *mlxsw_m = mlxsw_core_driver_priv(mlxsw_core);
+
+	mlxsw_m_ports_remove(mlxsw_m);
+	mlxsw_linecards_event_ops_unregister(mlxsw_core,
+					     &mlxsw_m_event_ops, mlxsw_m);
+	mlxsw_m_linecards_fini(mlxsw_m);
+}
+
+static const struct mlxsw_config_profile mlxsw_m_config_profile;
+
+static struct mlxsw_driver mlxsw_m_driver = {
+	.kind			= mlxsw_m_driver_name,
+	.priv_size		= sizeof(struct mlxsw_m),
+	.init			= mlxsw_m_init,
+	.fini			= mlxsw_m_fini,
+	.ports_remove_selected	= mlxsw_m_ports_remove_selected,
+	.profile		= &mlxsw_m_config_profile,
+};
+
+static const struct i2c_device_id mlxsw_m_i2c_id[] = {
+	{ "mlxsw_minimal", 0},
+	{ },
+};
+
+static struct i2c_driver mlxsw_m_i2c_driver = {
+	.driver.name = "mlxsw_minimal",
+	.class = I2C_CLASS_HWMON,
+	.id_table = mlxsw_m_i2c_id,
+};
+
+static int __init mlxsw_m_module_init(void)
+{
+	int err;
+
+	err = mlxsw_core_driver_register(&mlxsw_m_driver);
+	if (err)
+		return err;
+
+	err = mlxsw_i2c_driver_register(&mlxsw_m_i2c_driver);
+	if (err)
+		goto err_i2c_driver_register;
+
+	return 0;
+
+err_i2c_driver_register:
+	mlxsw_core_driver_unregister(&mlxsw_m_driver);
+
+	return err;
+}
+
+static void __exit mlxsw_m_module_exit(void)
+{
+	mlxsw_i2c_driver_unregister(&mlxsw_m_i2c_driver);
+	mlxsw_core_driver_unregister(&mlxsw_m_driver);
+}
+
+module_init(mlxsw_m_module_init);
+module_exit(mlxsw_m_module_exit);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>");
+MODULE_DESCRIPTION("Mellanox minimal driver");
+MODULE_DEVICE_TABLE(i2c, mlxsw_m_i2c_id);