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, 446 insertions, 0 deletions

diff --git a/drivers/net/wwan/iosm/iosm_ipc_mux.h b/drivers/net/wwan/iosm/iosm_ipc_mux.h
new file mode 100644
index 000000000..9968bb885
--- /dev/null
+++ b/drivers/net/wwan/iosm/iosm_ipc_mux.h
@@ -0,0 +1,446 @@
+/* SPDX-License-Identifier: GPL-2.0-only
+ *
+ * Copyright (C) 2020-21 Intel Corporation.
+ */
+
+#ifndef IOSM_IPC_MUX_H
+#define IOSM_IPC_MUX_H
+
+#include "iosm_ipc_protocol.h"
+
+#define IPC_MEM_MAX_UL_DG_ENTRIES	100
+#define IPC_MEM_MAX_TDS_MUX_AGGR_UL	60
+#define IPC_MEM_MAX_TDS_MUX_AGGR_DL	60
+
+#define IPC_MEM_MAX_ADB_BUF_SIZE (16 * 1024)
+#define IPC_MEM_MAX_UL_ADB_BUF_SIZE IPC_MEM_MAX_ADB_BUF_SIZE
+#define IPC_MEM_MAX_DL_ADB_BUF_SIZE IPC_MEM_MAX_ADB_BUF_SIZE
+
+/* Size of the buffer for the IP MUX Lite data buffer. */
+#define IPC_MEM_MAX_DL_MUX_LITE_BUF_SIZE (2 * 1024)
+
+/* TD counts for IP MUX Lite */
+#define IPC_MEM_MAX_TDS_MUX_LITE_UL 800
+#define IPC_MEM_MAX_TDS_MUX_LITE_DL 1200
+
+/* open session request (AP->CP) */
+#define MUX_CMD_OPEN_SESSION 1
+
+/* response to open session request (CP->AP) */
+#define MUX_CMD_OPEN_SESSION_RESP 2
+
+/* close session request (AP->CP) */
+#define MUX_CMD_CLOSE_SESSION 3
+
+/* response to close session request (CP->AP) */
+#define MUX_CMD_CLOSE_SESSION_RESP 4
+
+/* Flow control command with mask of the flow per queue/flow. */
+#define MUX_LITE_CMD_FLOW_CTL 5
+
+/* ACK the flow control command. Shall have the same Transaction ID as the
+ * matching FLOW_CTL command.
+ */
+#define MUX_LITE_CMD_FLOW_CTL_ACK 6
+
+/* Command for report packet indicating link quality metrics. */
+#define MUX_LITE_CMD_LINK_STATUS_REPORT 7
+
+/* Response to a report packet */
+#define MUX_LITE_CMD_LINK_STATUS_REPORT_RESP 8
+
+/* Used to reset a command/response state. */
+#define MUX_CMD_INVALID 255
+
+/* command response : command processed successfully */
+#define MUX_CMD_RESP_SUCCESS 0
+
+/* MUX for route link devices */
+#define IPC_MEM_WWAN_MUX BIT(0)
+
+/* Initiated actions to change the state of the MUX object. */
+enum mux_event {
+	MUX_E_INACTIVE, /* No initiated actions. */
+	MUX_E_MUX_SESSION_OPEN, /* Create the MUX channel and a session. */
+	MUX_E_MUX_SESSION_CLOSE, /* Release a session. */
+	MUX_E_MUX_CHANNEL_CLOSE, /* Release the MUX channel. */
+	MUX_E_NO_ORDERS, /* No MUX order. */
+	MUX_E_NOT_APPLICABLE, /* Defect IP MUX. */
+};
+
+/* MUX session open command. */
+struct mux_session_open {
+	enum mux_event event;
+	__le32 if_id;
+};
+
+/* MUX session close command. */
+struct mux_session_close {
+	enum mux_event event;
+	__le32 if_id;
+};
+
+/* MUX channel close command. */
+struct mux_channel_close {
+	enum mux_event event;
+};
+
+/* Default message type to find out the right message type. */
+struct mux_common {
+	enum mux_event event;
+};
+
+/* List of ops in MUX mode. */
+union mux_msg {
+	struct mux_session_open session_open;
+	struct mux_session_close session_close;
+	struct mux_channel_close channel_close;
+	struct mux_common common;
+};
+
+/* Parameter definition of the open session command. */
+struct mux_cmd_open_session {
+	u8 flow_ctrl; /* 0: Flow control disabled (flow allowed). */
+	/* 1: Flow control enabled (flow not allowed)*/
+	u8 ipv4v6_hints; /* 0: IPv4/IPv6 hints not supported.*/
+	/* 1: IPv4/IPv6 hints supported*/
+	__le16 reserved2; /* Reserved. Set to zero. */
+	__le32 dl_head_pad_len; /* Maximum length supported */
+	/* for DL head padding on a datagram. */
+};
+
+/* Parameter definition of the open session response. */
+struct mux_cmd_open_session_resp {
+	__le32 response; /* Response code */
+	u8 flow_ctrl; /* 0: Flow control disabled (flow allowed). */
+	/* 1: Flow control enabled (flow not allowed) */
+	u8 ipv4v6_hints; /* 0: IPv4/IPv6 hints not supported */
+	/* 1: IPv4/IPv6 hints supported */
+	__le16 reserved2; /* Reserved. Set to zero. */
+	__le32 ul_head_pad_len; /* Actual length supported for */
+	/* UL head padding on adatagram.*/
+};
+
+/* Parameter definition of the close session response code */
+struct mux_cmd_close_session_resp {
+	__le32 response;
+};
+
+/* Parameter definition of the flow control command. */
+struct mux_cmd_flow_ctl {
+	__le32 mask; /* indicating the desired flow control */
+	/* state for various flows/queues */
+};
+
+/* Parameter definition of the link status report code*/
+struct mux_cmd_link_status_report {
+	u8 payload;
+};
+
+/* Parameter definition of the link status report response code. */
+struct mux_cmd_link_status_report_resp {
+	__le32 response;
+};
+
+/**
+ * union mux_cmd_param - Union-definition of the command parameters.
+ * @open_session:	Inband command for open session
+ * @open_session_resp:	Inband command for open session response
+ * @close_session_resp:	Inband command for close session response
+ * @flow_ctl:		In-band flow control on the opened interfaces
+ * @link_status:	In-band Link Status Report
+ * @link_status_resp:	In-band command for link status report response
+ */
+union mux_cmd_param {
+	struct mux_cmd_open_session open_session;
+	struct mux_cmd_open_session_resp open_session_resp;
+	struct mux_cmd_close_session_resp close_session_resp;
+	struct mux_cmd_flow_ctl flow_ctl;
+	struct mux_cmd_link_status_report link_status;
+	struct mux_cmd_link_status_report_resp link_status_resp;
+};
+
+/* States of the MUX object.. */
+enum mux_state {
+	MUX_S_INACTIVE, /* IP MUX is unused. */
+	MUX_S_ACTIVE, /* IP MUX channel is available. */
+	MUX_S_ERROR, /* Defect IP MUX. */
+};
+
+/* Supported MUX protocols. */
+enum ipc_mux_protocol {
+	MUX_UNKNOWN,
+	MUX_LITE,
+	MUX_AGGREGATION,
+};
+
+/* Supported UL data transfer methods. */
+enum ipc_mux_ul_flow {
+	MUX_UL_UNKNOWN,
+	MUX_UL, /* Normal UL data transfer */
+	MUX_UL_ON_CREDITS, /* UL data transfer will be based on credits */
+};
+
+/* List of the MUX session. */
+struct mux_session {
+	struct iosm_wwan *wwan; /*Network i/f used for communication*/
+	int if_id; /* i/f id for session open message.*/
+	u32 flags;
+	u32 ul_head_pad_len; /* Nr of bytes for UL head padding. */
+	u32 dl_head_pad_len; /* Nr of bytes for DL head padding. */
+	struct sk_buff_head ul_list; /* skb entries for an ADT. */
+	u32 flow_ctl_mask; /* UL flow control */
+	u32 flow_ctl_en_cnt; /* Flow control Enable cmd count */
+	u32 flow_ctl_dis_cnt; /* Flow Control Disable cmd count */
+	int ul_flow_credits; /* UL flow credits */
+	u8 net_tx_stop:1,
+	   flush:1; /* flush net interface ? */
+};
+
+/**
+ * struct mux_adth_dg - Structure of the datagram in the Aggregated Datagram
+ *			Table Header.
+ * @datagram_index :	Index (in bytes) to the k-th datagram in the table.
+ *			Index shall count from the start of the block including
+ *			the 16-byte header. This value shall be non-zero.
+ * @datagram_length:	Length of the k-th datagram including the head padding.
+ *			This value shall be non-zero.
+ * @service_class:	Service class identifier for the datagram.
+ * @reserved:		Reserved bytes. Set to zero
+ */
+struct mux_adth_dg {
+	__le32 datagram_index;
+	__le16 datagram_length;
+	u8 service_class;
+	u8 reserved;
+};
+
+/**
+ * struct mux_qlth_ql - Structure of the queue level in the Aggregated
+ *			Datagram Queue Level Table Header.
+ * @nr_of_bytes:	Number of bytes available to transmit in the queue.
+ */
+struct mux_qlth_ql {
+	__le32 nr_of_bytes;
+};
+
+/**
+ * struct mux_qlth -    Structure of Aggregated Datagram Queue Level Table
+ *			Header.
+ * @signature:          Signature of the Queue Level Table Header
+ *                      Value: 0x48544C51 (ASCII characters: 'Q' 'L' 'T' 'H')
+ * @table_length:       Length (in bytes) of the datagram table. This length
+ *                      shall include the queue level table header size.
+ *                      Minimum value:0x10
+ * @if_id:              ID of the interface the queue levels in the table
+ *                      belong to.
+ * @reserved:           Reserved byte. Set to zero.
+ * @next_table_index:   Index (in bytes) to the next table in the buffer. Index
+ *                      shall count from the start of the block including the
+ *                      16-byte header. Value of zero indicates end of the list.
+ * @reserved2:          Reserved bytes. Set to zero
+ * @ql:                 Queue level table with variable length
+ */
+struct mux_qlth {
+	__le32 signature;
+	__le16 table_length;
+	u8 if_id;
+	u8 reserved;
+	__le32 next_table_index;
+	__le32 reserved2;
+	struct mux_qlth_ql ql;
+};
+
+/**
+ * struct mux_adb - Structure of State of a single UL data block.
+ * @dest_skb:		Current UL skb for the data block.
+ * @buf:		ADB memory
+ * @adgh:		ADGH pointer
+ * @qlth_skb:		QLTH pointer
+ * @next_table_index:	Pointer to next table index.
+ * @free_list:		List of alloc. ADB for the UL sess.
+ * @size:		Size of the ADB memory.
+ * @if_cnt:		Statistic counter
+ * @dg_cnt_total:	Datagram count total
+ * @payload_size:	Payload Size
+ * @dg:			Datagram table.
+ * @pp_qlt:		Pointers to hold Queue Level Tables of session
+ * @adbh:		ADBH pointer
+ * @qlt_updated:	Queue level table updated
+ * @dg_count:		Datagram count
+ */
+struct mux_adb {
+	struct sk_buff *dest_skb;
+	u8 *buf;
+	struct mux_adgh *adgh;
+	struct sk_buff *qlth_skb;
+	u32 *next_table_index;
+	struct sk_buff_head free_list;
+	int size;
+	u32 if_cnt;
+	u32 dg_cnt_total;
+	u32 payload_size;
+	struct mux_adth_dg
+		dg[IPC_MEM_MUX_IP_SESSION_ENTRIES][IPC_MEM_MAX_UL_DG_ENTRIES];
+	struct mux_qlth *pp_qlt[IPC_MEM_MUX_IP_SESSION_ENTRIES];
+	struct mux_adbh *adbh;
+	u32 qlt_updated[IPC_MEM_MUX_IP_SESSION_ENTRIES];
+	u32 dg_count[IPC_MEM_MUX_IP_SESSION_ENTRIES];
+};
+
+/**
+ * struct mux_acb - Structure of Temporary ACB state.
+ * @skb:		Used UL skb.
+ * @if_id:		Session id.
+ * @buf_p:		Command buffer.
+ * @wanted_response:	Wanted Response
+ * @got_response:	Got response
+ * @cmd:		command
+ * @got_param:		Received command/response parameter
+ */
+struct mux_acb {
+	struct sk_buff *skb; /* Used UL skb. */
+	int if_id; /* Session id. */
+	u8 *buf_p;
+	u32 wanted_response;
+	u32 got_response;
+	u32 cmd;
+	union mux_cmd_param got_param; /* Received command/response parameter */
+};
+
+/**
+ * struct iosm_mux - Structure of the data multiplexing over an IP channel.
+ * @dev:		Pointer to device structure
+ * @session:		Array of the MUX sessions.
+ * @channel:		Reference to the IP MUX channel
+ * @pcie:		Pointer to iosm_pcie struct
+ * @imem:		Pointer to iosm_imem
+ * @wwan:		Poinetr to iosm_wwan
+ * @ipc_protocol:	Pointer to iosm_protocol
+ * @channel_id:		Channel ID for MUX
+ * @protocol:		Type of the MUX protocol
+ * @ul_flow:		UL Flow type
+ * @nr_sessions:	Number of sessions
+ * @instance_id:	Instance ID
+ * @state:		States of the MUX object
+ * @event:		Initiated actions to change the state of the MUX object
+ * @tx_transaction_id:	Transaction id for the ACB command.
+ * @rr_next_session:	Next session number for round robin.
+ * @ul_adb:		State of the UL ADB/ADGH.
+ * @size_needed:	Variable to store the size needed during ADB preparation
+ * @ul_data_pend_bytes:	Pending UL data to be processed in bytes
+ * @acb:		Temporary ACB state
+ * @wwan_q_offset:	This will hold the offset of the given instance
+ *			Useful while passing or receiving packets from
+ *			wwan/imem layer.
+ * @adb_finish_timer:	Timer for forcefully finishing the ADB
+ * @acb_tx_sequence_nr: Sequence number for the ACB header.
+ * @params:		user configurable parameters
+ * @adb_tx_sequence_nr: Sequence number for ADB header
+ * @acc_adb_size:       Statistic data for logging
+ * @acc_payload_size:   Statistic data for logging
+ * @initialized:	MUX object is initialized
+ * @ev_mux_net_transmit_pending:
+ *			0 means inform the IPC tasklet to pass the
+ *			accumulated uplink ADB to CP.
+ * @adb_prep_ongoing:	Flag for ADB preparation status
+ */
+struct iosm_mux {
+	struct device *dev;
+	struct mux_session session[IPC_MEM_MUX_IP_SESSION_ENTRIES];
+	struct ipc_mem_channel *channel;
+	struct iosm_pcie *pcie;
+	struct iosm_imem *imem;
+	struct iosm_wwan *wwan;
+	struct iosm_protocol *ipc_protocol;
+	int channel_id;
+	enum ipc_mux_protocol protocol;
+	enum ipc_mux_ul_flow ul_flow;
+	int nr_sessions;
+	int instance_id;
+	enum mux_state state;
+	enum mux_event event;
+	u32 tx_transaction_id;
+	int rr_next_session;
+	struct mux_adb ul_adb;
+	int size_needed;
+	long long ul_data_pend_bytes;
+	struct mux_acb acb;
+	int wwan_q_offset;
+	struct hrtimer adb_finish_timer;
+	u16 acb_tx_sequence_nr;
+	struct ipc_params *params;
+	u16 adb_tx_sequence_nr;
+	unsigned long long acc_adb_size;
+	unsigned long long acc_payload_size;
+	u8 initialized:1,
+	   ev_mux_net_transmit_pending:1,
+	   adb_prep_ongoing;
+} __packed;
+
+/* MUX configuration structure */
+struct ipc_mux_config {
+	enum ipc_mux_protocol protocol;
+	enum ipc_mux_ul_flow ul_flow;
+	int instance_id;
+};
+
+/**
+ * ipc_mux_init - Allocates and Init MUX instance
+ * @mux_cfg:	Pointer to MUX configuration structure
+ * @ipc_imem:	Pointer to imem data-struct
+ *
+ * Returns: Initialized mux pointer on success else NULL
+ */
+struct iosm_mux *ipc_mux_init(struct ipc_mux_config *mux_cfg,
+			      struct iosm_imem *ipc_imem);
+
+/**
+ * ipc_mux_deinit - Deallocates MUX instance
+ * @ipc_mux:	Pointer to the MUX instance.
+ */
+void ipc_mux_deinit(struct iosm_mux *ipc_mux);
+
+/**
+ * ipc_mux_check_n_restart_tx - Checks for pending UL date bytes and then
+ *				it restarts the net interface tx queue if
+ *				device has set flow control as off.
+ * @ipc_mux:	Pointer to MUX data-struct
+ */
+void ipc_mux_check_n_restart_tx(struct iosm_mux *ipc_mux);
+
+/**
+ * ipc_mux_get_active_protocol - Returns the active MUX protocol type.
+ * @ipc_mux:	Pointer to MUX data-struct
+ *
+ * Returns: enum of type ipc_mux_protocol
+ */
+enum ipc_mux_protocol ipc_mux_get_active_protocol(struct iosm_mux *ipc_mux);
+
+/**
+ * ipc_mux_open_session - Opens a MUX session for IP traffic.
+ * @ipc_mux:	Pointer to MUX data-struct
+ * @session_nr:	Interface ID or session number
+ *
+ * Returns: channel id on success, failure value on error
+ */
+int ipc_mux_open_session(struct iosm_mux *ipc_mux, int session_nr);
+
+/**
+ * ipc_mux_close_session - Closes a MUX session.
+ * @ipc_mux:	Pointer to MUX data-struct
+ * @session_nr:	Interface ID or session number
+ *
+ * Returns: channel id on success, failure value on error
+ */
+int ipc_mux_close_session(struct iosm_mux *ipc_mux, int session_nr);
+
+/**
+ * ipc_mux_get_max_sessions - Retuns the maximum sessions supported on the
+ *			      provided MUX instance..
+ * @ipc_mux:	Pointer to MUX data-struct
+ *
+ * Returns: Number of sessions supported on Success and failure value on error
+ */
+int ipc_mux_get_max_sessions(struct iosm_mux *ipc_mux);
+#endif