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, 836 insertions, 0 deletions

diff --git a/drivers/misc/mei/hw.h b/drivers/misc/mei/hw.h
new file mode 100644
index 000000000..319418ddf
--- /dev/null
+++ b/drivers/misc/mei/hw.h
@@ -0,0 +1,836 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2003-2022, Intel Corporation. All rights reserved
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ */
+
+#ifndef _MEI_HW_TYPES_H_
+#define _MEI_HW_TYPES_H_
+
+#include <linux/uuid.h>
+
+/*
+ * Timeouts in Seconds
+ */
+#define MEI_HW_READY_TIMEOUT        2  /* Timeout on ready message */
+#define MEI_CONNECT_TIMEOUT         3  /* HPS: at least 2 seconds */
+
+#define MEI_CL_CONNECT_TIMEOUT     15  /* HPS: Client Connect Timeout */
+#define MEI_CL_CONNECT_TIMEOUT_SLOW 30 /* HPS: Client Connect Timeout, slow FW */
+#define MEI_CLIENTS_INIT_TIMEOUT   15  /* HPS: Clients Enumeration Timeout */
+
+#define MEI_PGI_TIMEOUT             1  /* PG Isolation time response 1 sec */
+#define MEI_D0I3_TIMEOUT            5  /* D0i3 set/unset max response time */
+#define MEI_HBM_TIMEOUT             1  /* 1 second */
+#define MEI_HBM_TIMEOUT_SLOW        5  /* 5 second, slow FW */
+
+#define MKHI_RCV_TIMEOUT 500 /* receive timeout in msec */
+#define MKHI_RCV_TIMEOUT_SLOW 10000 /* receive timeout in msec, slow FW */
+
+/*
+ * FW page size for DMA allocations
+ */
+#define MEI_FW_PAGE_SIZE 4096UL
+
+/*
+ * MEI Version
+ */
+#define HBM_MINOR_VERSION                   2
+#define HBM_MAJOR_VERSION                   2
+
+/*
+ * MEI version with PGI support
+ */
+#define HBM_MINOR_VERSION_PGI               1
+#define HBM_MAJOR_VERSION_PGI               1
+
+/*
+ * MEI version with Dynamic clients support
+ */
+#define HBM_MINOR_VERSION_DC               0
+#define HBM_MAJOR_VERSION_DC               2
+
+/*
+ * MEI version with immediate reply to enum request support
+ */
+#define HBM_MINOR_VERSION_IE               0
+#define HBM_MAJOR_VERSION_IE               2
+
+/*
+ * MEI version with disconnect on connection timeout support
+ */
+#define HBM_MINOR_VERSION_DOT              0
+#define HBM_MAJOR_VERSION_DOT              2
+
+/*
+ * MEI version with notification support
+ */
+#define HBM_MINOR_VERSION_EV               0
+#define HBM_MAJOR_VERSION_EV               2
+
+/*
+ * MEI version with fixed address client support
+ */
+#define HBM_MINOR_VERSION_FA               0
+#define HBM_MAJOR_VERSION_FA               2
+
+/*
+ * MEI version with OS ver message support
+ */
+#define HBM_MINOR_VERSION_OS               0
+#define HBM_MAJOR_VERSION_OS               2
+
+/*
+ * MEI version with dma ring support
+ */
+#define HBM_MINOR_VERSION_DR               1
+#define HBM_MAJOR_VERSION_DR               2
+
+/*
+ * MEI version with vm tag support
+ */
+#define HBM_MINOR_VERSION_VT               2
+#define HBM_MAJOR_VERSION_VT               2
+
+/*
+ * MEI version with GSC support
+ */
+#define HBM_MINOR_VERSION_GSC              2
+#define HBM_MAJOR_VERSION_GSC              2
+
+/*
+ * MEI version with capabilities message support
+ */
+#define HBM_MINOR_VERSION_CAP              2
+#define HBM_MAJOR_VERSION_CAP              2
+
+/*
+ * MEI version with client DMA support
+ */
+#define HBM_MINOR_VERSION_CD               2
+#define HBM_MAJOR_VERSION_CD               2
+
+/* Host bus message command opcode */
+#define MEI_HBM_CMD_OP_MSK                  0x7f
+/* Host bus message command RESPONSE */
+#define MEI_HBM_CMD_RES_MSK                 0x80
+
+/*
+ * MEI Bus Message Command IDs
+ */
+#define HOST_START_REQ_CMD                  0x01
+#define HOST_START_RES_CMD                  0x81
+
+#define HOST_STOP_REQ_CMD                   0x02
+#define HOST_STOP_RES_CMD                   0x82
+
+#define ME_STOP_REQ_CMD                     0x03
+
+#define HOST_ENUM_REQ_CMD                   0x04
+#define HOST_ENUM_RES_CMD                   0x84
+
+#define HOST_CLIENT_PROPERTIES_REQ_CMD      0x05
+#define HOST_CLIENT_PROPERTIES_RES_CMD      0x85
+
+#define CLIENT_CONNECT_REQ_CMD              0x06
+#define CLIENT_CONNECT_RES_CMD              0x86
+
+#define CLIENT_DISCONNECT_REQ_CMD           0x07
+#define CLIENT_DISCONNECT_RES_CMD           0x87
+
+#define MEI_FLOW_CONTROL_CMD                0x08
+
+#define MEI_PG_ISOLATION_ENTRY_REQ_CMD      0x0a
+#define MEI_PG_ISOLATION_ENTRY_RES_CMD      0x8a
+#define MEI_PG_ISOLATION_EXIT_REQ_CMD       0x0b
+#define MEI_PG_ISOLATION_EXIT_RES_CMD       0x8b
+
+#define MEI_HBM_ADD_CLIENT_REQ_CMD          0x0f
+#define MEI_HBM_ADD_CLIENT_RES_CMD          0x8f
+
+#define MEI_HBM_NOTIFY_REQ_CMD              0x10
+#define MEI_HBM_NOTIFY_RES_CMD              0x90
+#define MEI_HBM_NOTIFICATION_CMD            0x11
+
+#define MEI_HBM_DMA_SETUP_REQ_CMD           0x12
+#define MEI_HBM_DMA_SETUP_RES_CMD           0x92
+
+#define MEI_HBM_CAPABILITIES_REQ_CMD        0x13
+#define MEI_HBM_CAPABILITIES_RES_CMD        0x93
+
+#define MEI_HBM_CLIENT_DMA_MAP_REQ_CMD      0x14
+#define MEI_HBM_CLIENT_DMA_MAP_RES_CMD      0x94
+
+#define MEI_HBM_CLIENT_DMA_UNMAP_REQ_CMD    0x15
+#define MEI_HBM_CLIENT_DMA_UNMAP_RES_CMD    0x95
+
+/*
+ * MEI Stop Reason
+ * used by hbm_host_stop_request.reason
+ */
+enum mei_stop_reason_types {
+	DRIVER_STOP_REQUEST = 0x00,
+	DEVICE_D1_ENTRY = 0x01,
+	DEVICE_D2_ENTRY = 0x02,
+	DEVICE_D3_ENTRY = 0x03,
+	SYSTEM_S1_ENTRY = 0x04,
+	SYSTEM_S2_ENTRY = 0x05,
+	SYSTEM_S3_ENTRY = 0x06,
+	SYSTEM_S4_ENTRY = 0x07,
+	SYSTEM_S5_ENTRY = 0x08
+};
+
+
+/**
+ * enum mei_hbm_status  - mei host bus messages return values
+ *
+ * @MEI_HBMS_SUCCESS           : status success
+ * @MEI_HBMS_CLIENT_NOT_FOUND  : client not found
+ * @MEI_HBMS_ALREADY_EXISTS    : connection already established
+ * @MEI_HBMS_REJECTED          : connection is rejected
+ * @MEI_HBMS_INVALID_PARAMETER : invalid parameter
+ * @MEI_HBMS_NOT_ALLOWED       : operation not allowed
+ * @MEI_HBMS_ALREADY_STARTED   : system is already started
+ * @MEI_HBMS_NOT_STARTED       : system not started
+ *
+ * @MEI_HBMS_MAX               : sentinel
+ */
+enum mei_hbm_status {
+	MEI_HBMS_SUCCESS           = 0,
+	MEI_HBMS_CLIENT_NOT_FOUND  = 1,
+	MEI_HBMS_ALREADY_EXISTS    = 2,
+	MEI_HBMS_REJECTED          = 3,
+	MEI_HBMS_INVALID_PARAMETER = 4,
+	MEI_HBMS_NOT_ALLOWED       = 5,
+	MEI_HBMS_ALREADY_STARTED   = 6,
+	MEI_HBMS_NOT_STARTED       = 7,
+
+	MEI_HBMS_MAX
+};
+
+
+/*
+ * Client Connect Status
+ * used by hbm_client_connect_response.status
+ */
+enum mei_cl_connect_status {
+	MEI_CL_CONN_SUCCESS          = MEI_HBMS_SUCCESS,
+	MEI_CL_CONN_NOT_FOUND        = MEI_HBMS_CLIENT_NOT_FOUND,
+	MEI_CL_CONN_ALREADY_STARTED  = MEI_HBMS_ALREADY_EXISTS,
+	MEI_CL_CONN_OUT_OF_RESOURCES = MEI_HBMS_REJECTED,
+	MEI_CL_CONN_MESSAGE_SMALL    = MEI_HBMS_INVALID_PARAMETER,
+	MEI_CL_CONN_NOT_ALLOWED      = MEI_HBMS_NOT_ALLOWED,
+};
+
+/*
+ * Client Disconnect Status
+ */
+enum mei_cl_disconnect_status {
+	MEI_CL_DISCONN_SUCCESS = MEI_HBMS_SUCCESS
+};
+
+/**
+ * enum mei_ext_hdr_type - extended header type used in
+ *    extended header TLV
+ *
+ * @MEI_EXT_HDR_NONE: sentinel
+ * @MEI_EXT_HDR_VTAG: vtag header
+ * @MEI_EXT_HDR_GSC: gsc header
+ */
+enum mei_ext_hdr_type {
+	MEI_EXT_HDR_NONE = 0,
+	MEI_EXT_HDR_VTAG = 1,
+	MEI_EXT_HDR_GSC = 2,
+};
+
+/**
+ * struct mei_ext_hdr - extend header descriptor (TLV)
+ * @type: enum mei_ext_hdr_type
+ * @length: length excluding descriptor
+ * @data: the extended header payload
+ */
+struct mei_ext_hdr {
+	u8 type;
+	u8 length;
+	u8 data[];
+} __packed;
+
+/**
+ * struct mei_ext_meta_hdr - extend header meta data
+ * @count: number of headers
+ * @size: total size of the extended header list excluding meta header
+ * @reserved: reserved
+ * @hdrs: extended headers TLV list
+ */
+struct mei_ext_meta_hdr {
+	u8 count;
+	u8 size;
+	u8 reserved[2];
+	u8 hdrs[];
+} __packed;
+
+/**
+ * struct mei_ext_hdr_vtag - extend header for vtag
+ *
+ * @hdr: standard extend header
+ * @vtag: virtual tag
+ * @reserved: reserved
+ */
+struct mei_ext_hdr_vtag {
+	struct mei_ext_hdr hdr;
+	u8 vtag;
+	u8 reserved;
+} __packed;
+
+/*
+ * Extended header iterator functions
+ */
+/**
+ * mei_ext_begin - extended header iterator begin
+ *
+ * @meta: meta header of the extended header list
+ *
+ * Return: The first extended header
+ */
+static inline struct mei_ext_hdr *mei_ext_begin(struct mei_ext_meta_hdr *meta)
+{
+	return (struct mei_ext_hdr *)meta->hdrs;
+}
+
+/**
+ * mei_ext_last - check if the ext is the last one in the TLV list
+ *
+ * @meta: meta header of the extended header list
+ * @ext: a meta header on the list
+ *
+ * Return: true if ext is the last header on the list
+ */
+static inline bool mei_ext_last(struct mei_ext_meta_hdr *meta,
+				struct mei_ext_hdr *ext)
+{
+	return (u8 *)ext >= (u8 *)meta + sizeof(*meta) + (meta->size * 4);
+}
+
+struct mei_gsc_sgl {
+	u32 low;
+	u32 high;
+	u32 length;
+} __packed;
+
+#define GSC_HECI_MSG_KERNEL 0
+#define GSC_HECI_MSG_USER   1
+
+#define GSC_ADDRESS_TYPE_GTT   0
+#define GSC_ADDRESS_TYPE_PPGTT 1
+#define GSC_ADDRESS_TYPE_PHYSICAL_CONTINUOUS 2 /* max of 64K */
+#define GSC_ADDRESS_TYPE_PHYSICAL_SGL 3
+
+/**
+ * struct mei_ext_hdr_gsc_h2f - extended header: gsc host to firmware interface
+ *
+ * @hdr: extended header
+ * @client_id: GSC_HECI_MSG_KERNEL or GSC_HECI_MSG_USER
+ * @addr_type: GSC_ADDRESS_TYPE_{GTT, PPGTT, PHYSICAL_CONTINUOUS, PHYSICAL_SGL}
+ * @fence_id: synchronization marker
+ * @input_address_count: number of input sgl buffers
+ * @output_address_count: number of output sgl buffers
+ * @reserved: reserved
+ * @sgl: sg list
+ */
+struct mei_ext_hdr_gsc_h2f {
+	struct mei_ext_hdr hdr;
+	u8                 client_id;
+	u8                 addr_type;
+	u32                fence_id;
+	u8                 input_address_count;
+	u8                 output_address_count;
+	u8                 reserved[2];
+	struct mei_gsc_sgl sgl[];
+} __packed;
+
+/**
+ * struct mei_ext_hdr_gsc_f2h - gsc firmware to host interface
+ *
+ * @hdr: extended header
+ * @client_id: GSC_HECI_MSG_KERNEL or GSC_HECI_MSG_USER
+ * @reserved: reserved
+ * @fence_id: synchronization marker
+ * @written: number of bytes written to firmware
+ */
+struct mei_ext_hdr_gsc_f2h {
+	struct mei_ext_hdr hdr;
+	u8                 client_id;
+	u8                 reserved;
+	u32                fence_id;
+	u32                written;
+} __packed;
+
+/**
+ * mei_ext_next - following extended header on the TLV list
+ *
+ * @ext: current extend header
+ *
+ * Context: The function does not check for the overflows,
+ *          one should call mei_ext_last before.
+ *
+ * Return: The following extend header after @ext
+ */
+static inline struct mei_ext_hdr *mei_ext_next(struct mei_ext_hdr *ext)
+{
+	return (struct mei_ext_hdr *)((u8 *)ext + (ext->length * 4));
+}
+
+/**
+ * mei_ext_hdr_len - get ext header length in bytes
+ *
+ * @ext: extend header
+ *
+ * Return: extend header length in bytes
+ */
+static inline u32 mei_ext_hdr_len(const struct mei_ext_hdr *ext)
+{
+	if (!ext)
+		return 0;
+
+	return ext->length * sizeof(u32);
+}
+
+/**
+ * struct mei_msg_hdr - MEI BUS Interface Section
+ *
+ * @me_addr: device address
+ * @host_addr: host address
+ * @length: message length
+ * @reserved: reserved
+ * @extended: message has extended header
+ * @dma_ring: message is on dma ring
+ * @internal: message is internal
+ * @msg_complete: last packet of the message
+ * @extension: extension of the header
+ */
+struct mei_msg_hdr {
+	u32 me_addr:8;
+	u32 host_addr:8;
+	u32 length:9;
+	u32 reserved:3;
+	u32 extended:1;
+	u32 dma_ring:1;
+	u32 internal:1;
+	u32 msg_complete:1;
+	u32 extension[];
+} __packed;
+
+/* The length is up to 9 bits */
+#define MEI_MSG_MAX_LEN_MASK GENMASK(9, 0)
+
+struct mei_bus_message {
+	u8 hbm_cmd;
+	u8 data[];
+} __packed;
+
+/**
+ * struct hbm_cl_cmd - client specific host bus command
+ *	CONNECT, DISCONNECT, and FlOW CONTROL
+ *
+ * @hbm_cmd: bus message command header
+ * @me_addr: address of the client in ME
+ * @host_addr: address of the client in the driver
+ * @data: generic data
+ */
+struct mei_hbm_cl_cmd {
+	u8 hbm_cmd;
+	u8 me_addr;
+	u8 host_addr;
+	u8 data;
+};
+
+struct hbm_version {
+	u8 minor_version;
+	u8 major_version;
+} __packed;
+
+struct hbm_host_version_request {
+	u8 hbm_cmd;
+	u8 reserved;
+	struct hbm_version host_version;
+} __packed;
+
+struct hbm_host_version_response {
+	u8 hbm_cmd;
+	u8 host_version_supported;
+	struct hbm_version me_max_version;
+} __packed;
+
+struct hbm_host_stop_request {
+	u8 hbm_cmd;
+	u8 reason;
+	u8 reserved[2];
+} __packed;
+
+struct hbm_host_stop_response {
+	u8 hbm_cmd;
+	u8 reserved[3];
+} __packed;
+
+struct hbm_me_stop_request {
+	u8 hbm_cmd;
+	u8 reason;
+	u8 reserved[2];
+} __packed;
+
+/**
+ * enum hbm_host_enum_flags - enumeration request flags (HBM version >= 2.0)
+ *
+ * @MEI_HBM_ENUM_F_ALLOW_ADD: allow dynamic clients add
+ * @MEI_HBM_ENUM_F_IMMEDIATE_ENUM: allow FW to send answer immediately
+ */
+enum hbm_host_enum_flags {
+	MEI_HBM_ENUM_F_ALLOW_ADD = BIT(0),
+	MEI_HBM_ENUM_F_IMMEDIATE_ENUM = BIT(1),
+};
+
+/**
+ * struct hbm_host_enum_request - enumeration request from host to fw
+ *
+ * @hbm_cmd : bus message command header
+ * @flags   : request flags
+ * @reserved: reserved
+ */
+struct hbm_host_enum_request {
+	u8 hbm_cmd;
+	u8 flags;
+	u8 reserved[2];
+} __packed;
+
+struct hbm_host_enum_response {
+	u8 hbm_cmd;
+	u8 reserved[3];
+	u8 valid_addresses[32];
+} __packed;
+
+/**
+ * struct mei_client_properties - mei client properties
+ *
+ * @protocol_name: guid of the client
+ * @protocol_version: client protocol version
+ * @max_number_of_connections: number of possible connections.
+ * @fixed_address: fixed me address (0 if the client is dynamic)
+ * @single_recv_buf: 1 if all connections share a single receive buffer.
+ * @vt_supported: the client support vtag
+ * @reserved: reserved
+ * @max_msg_length: MTU of the client
+ */
+struct mei_client_properties {
+	uuid_le protocol_name;
+	u8 protocol_version;
+	u8 max_number_of_connections;
+	u8 fixed_address;
+	u8 single_recv_buf:1;
+	u8 vt_supported:1;
+	u8 reserved:6;
+	u32 max_msg_length;
+} __packed;
+
+struct hbm_props_request {
+	u8 hbm_cmd;
+	u8 me_addr;
+	u8 reserved[2];
+} __packed;
+
+struct hbm_props_response {
+	u8 hbm_cmd;
+	u8 me_addr;
+	u8 status;
+	u8 reserved;
+	struct mei_client_properties client_properties;
+} __packed;
+
+/**
+ * struct hbm_add_client_request - request to add a client
+ *     might be sent by fw after enumeration has already completed
+ *
+ * @hbm_cmd: bus message command header
+ * @me_addr: address of the client in ME
+ * @reserved: reserved
+ * @client_properties: client properties
+ */
+struct hbm_add_client_request {
+	u8 hbm_cmd;
+	u8 me_addr;
+	u8 reserved[2];
+	struct mei_client_properties client_properties;
+} __packed;
+
+/**
+ * struct hbm_add_client_response - response to add a client
+ *     sent by the host to report client addition status to fw
+ *
+ * @hbm_cmd: bus message command header
+ * @me_addr: address of the client in ME
+ * @status: if HBMS_SUCCESS then the client can now accept connections.
+ * @reserved: reserved
+ */
+struct hbm_add_client_response {
+	u8 hbm_cmd;
+	u8 me_addr;
+	u8 status;
+	u8 reserved;
+} __packed;
+
+/**
+ * struct hbm_power_gate - power gate request/response
+ *
+ * @hbm_cmd: bus message command header
+ * @reserved: reserved
+ */
+struct hbm_power_gate {
+	u8 hbm_cmd;
+	u8 reserved[3];
+} __packed;
+
+/**
+ * struct hbm_client_connect_request - connect/disconnect request
+ *
+ * @hbm_cmd: bus message command header
+ * @me_addr: address of the client in ME
+ * @host_addr: address of the client in the driver
+ * @reserved: reserved
+ */
+struct hbm_client_connect_request {
+	u8 hbm_cmd;
+	u8 me_addr;
+	u8 host_addr;
+	u8 reserved;
+} __packed;
+
+/**
+ * struct hbm_client_connect_response - connect/disconnect response
+ *
+ * @hbm_cmd: bus message command header
+ * @me_addr: address of the client in ME
+ * @host_addr: address of the client in the driver
+ * @status: status of the request
+ */
+struct hbm_client_connect_response {
+	u8 hbm_cmd;
+	u8 me_addr;
+	u8 host_addr;
+	u8 status;
+} __packed;
+
+
+#define MEI_FC_MESSAGE_RESERVED_LENGTH           5
+
+struct hbm_flow_control {
+	u8 hbm_cmd;
+	u8 me_addr;
+	u8 host_addr;
+	u8 reserved[MEI_FC_MESSAGE_RESERVED_LENGTH];
+} __packed;
+
+#define MEI_HBM_NOTIFICATION_START 1
+#define MEI_HBM_NOTIFICATION_STOP  0
+/**
+ * struct hbm_notification_request - start/stop notification request
+ *
+ * @hbm_cmd: bus message command header
+ * @me_addr: address of the client in ME
+ * @host_addr: address of the client in the driver
+ * @start:  start = 1 or stop = 0 asynchronous notifications
+ */
+struct hbm_notification_request {
+	u8 hbm_cmd;
+	u8 me_addr;
+	u8 host_addr;
+	u8 start;
+} __packed;
+
+/**
+ * struct hbm_notification_response - start/stop notification response
+ *
+ * @hbm_cmd: bus message command header
+ * @me_addr: address of the client in ME
+ * @host_addr: - address of the client in the driver
+ * @status: (mei_hbm_status) response status for the request
+ *  - MEI_HBMS_SUCCESS: successful stop/start
+ *  - MEI_HBMS_CLIENT_NOT_FOUND: if the connection could not be found.
+ *  - MEI_HBMS_ALREADY_STARTED: for start requests for a previously
+ *                         started notification.
+ *  - MEI_HBMS_NOT_STARTED: for stop request for a connected client for whom
+ *                         asynchronous notifications are currently disabled.
+ *
+ * @start:  start = 1 or stop = 0 asynchronous notifications
+ * @reserved: reserved
+ */
+struct hbm_notification_response {
+	u8 hbm_cmd;
+	u8 me_addr;
+	u8 host_addr;
+	u8 status;
+	u8 start;
+	u8 reserved[3];
+} __packed;
+
+/**
+ * struct hbm_notification - notification event
+ *
+ * @hbm_cmd: bus message command header
+ * @me_addr:  address of the client in ME
+ * @host_addr:  address of the client in the driver
+ * @reserved: reserved for alignment
+ */
+struct hbm_notification {
+	u8 hbm_cmd;
+	u8 me_addr;
+	u8 host_addr;
+	u8 reserved;
+} __packed;
+
+/**
+ * struct hbm_dma_mem_dscr - dma ring
+ *
+ * @addr_hi: the high 32bits of 64 bit address
+ * @addr_lo: the low  32bits of 64 bit address
+ * @size   : size in bytes (must be power of 2)
+ */
+struct hbm_dma_mem_dscr {
+	u32 addr_hi;
+	u32 addr_lo;
+	u32 size;
+} __packed;
+
+enum {
+	DMA_DSCR_HOST = 0,
+	DMA_DSCR_DEVICE = 1,
+	DMA_DSCR_CTRL = 2,
+	DMA_DSCR_NUM,
+};
+
+/**
+ * struct hbm_dma_setup_request - dma setup request
+ *
+ * @hbm_cmd: bus message command header
+ * @reserved: reserved for alignment
+ * @dma_dscr: dma descriptor for HOST, DEVICE, and CTRL
+ */
+struct hbm_dma_setup_request {
+	u8 hbm_cmd;
+	u8 reserved[3];
+	struct hbm_dma_mem_dscr dma_dscr[DMA_DSCR_NUM];
+} __packed;
+
+/**
+ * struct hbm_dma_setup_response - dma setup response
+ *
+ * @hbm_cmd: bus message command header
+ * @status: 0 on success; otherwise DMA setup failed.
+ * @reserved: reserved for alignment
+ */
+struct hbm_dma_setup_response {
+	u8 hbm_cmd;
+	u8 status;
+	u8 reserved[2];
+} __packed;
+
+/**
+ * struct mei_dma_ring_ctrl - dma ring control block
+ *
+ * @hbuf_wr_idx: host circular buffer write index in slots
+ * @reserved1: reserved for alignment
+ * @hbuf_rd_idx: host circular buffer read index in slots
+ * @reserved2: reserved for alignment
+ * @dbuf_wr_idx: device circular buffer write index in slots
+ * @reserved3: reserved for alignment
+ * @dbuf_rd_idx: device circular buffer read index in slots
+ * @reserved4: reserved for alignment
+ */
+struct hbm_dma_ring_ctrl {
+	u32 hbuf_wr_idx;
+	u32 reserved1;
+	u32 hbuf_rd_idx;
+	u32 reserved2;
+	u32 dbuf_wr_idx;
+	u32 reserved3;
+	u32 dbuf_rd_idx;
+	u32 reserved4;
+} __packed;
+
+/* virtual tag supported */
+#define HBM_CAP_VT BIT(0)
+
+/* gsc extended header support */
+#define HBM_CAP_GSC BIT(1)
+
+/* client dma supported */
+#define HBM_CAP_CD BIT(2)
+
+/**
+ * struct hbm_capability_request - capability request from host to fw
+ *
+ * @hbm_cmd : bus message command header
+ * @capability_requested: bitmask of capabilities requested by host
+ */
+struct hbm_capability_request {
+	u8 hbm_cmd;
+	u8 capability_requested[3];
+} __packed;
+
+/**
+ * struct hbm_capability_response - capability response from fw to host
+ *
+ * @hbm_cmd : bus message command header
+ * @capability_granted: bitmask of capabilities granted by FW
+ */
+struct hbm_capability_response {
+	u8 hbm_cmd;
+	u8 capability_granted[3];
+} __packed;
+
+/**
+ * struct hbm_client_dma_map_request - client dma map request from host to fw
+ *
+ * @hbm_cmd: bus message command header
+ * @client_buffer_id: client buffer id
+ * @reserved: reserved
+ * @address_lsb: DMA address LSB
+ * @address_msb: DMA address MSB
+ * @size: DMA size
+ */
+struct hbm_client_dma_map_request {
+	u8 hbm_cmd;
+	u8 client_buffer_id;
+	u8 reserved[2];
+	u32 address_lsb;
+	u32 address_msb;
+	u32 size;
+} __packed;
+
+/**
+ * struct hbm_client_dma_unmap_request
+ *    client dma unmap request from the host to the firmware
+ *
+ * @hbm_cmd: bus message command header
+ * @status: unmap status
+ * @client_buffer_id: client buffer id
+ * @reserved: reserved
+ */
+struct hbm_client_dma_unmap_request {
+	u8 hbm_cmd;
+	u8 status;
+	u8 client_buffer_id;
+	u8 reserved;
+} __packed;
+
+/**
+ * struct hbm_client_dma_response
+ *   client dma unmap response from the firmware to the host
+ *
+ * @hbm_cmd: bus message command header
+ * @status: command status
+ */
+struct hbm_client_dma_response {
+	u8 hbm_cmd;
+	u8 status;
+} __packed;
+
+#endif