/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2001-2021 Intel Corporation
 */

#ifndef _VIRTCHNL_H_
#define _VIRTCHNL_H_

/* Description:
 * This header file describes the VF-PF communication protocol used
 * by the drivers for all devices starting from our 40G product line
 *
 * Admin queue buffer usage:
 * desc->opcode is always aqc_opc_send_msg_to_pf
 * flags, retval, datalen, and data addr are all used normally.
 * The Firmware copies the cookie fields when sending messages between the
 * PF and VF, but uses all other fields internally. Due to this limitation,
 * we must send all messages as "indirect", i.e. using an external buffer.
 *
 * All the VSI indexes are relative to the VF. Each VF can have maximum of
 * three VSIs. All the queue indexes are relative to the VSI.  Each VF can
 * have a maximum of sixteen queues for all of its VSIs.
 *
 * The PF is required to return a status code in v_retval for all messages
 * except RESET_VF, which does not require any response. The return value
 * is of status_code type, defined in the shared type.h.
 *
 * In general, VF driver initialization should roughly follow the order of
 * these opcodes. The VF driver must first validate the API version of the
 * PF driver, then request a reset, then get resources, then configure
 * queues and interrupts. After these operations are complete, the VF
 * driver may start its queues, optionally add MAC and VLAN filters, and
 * process traffic.
 */

/* START GENERIC DEFINES
 * Need to ensure the following enums and defines hold the same meaning and
 * value in current and future projects
 */

/* Error Codes */
enum virtchnl_status_code {
        VIRTCHNL_STATUS_SUCCESS                         = 0,
        VIRTCHNL_STATUS_ERR_PARAM                       = -5,
        VIRTCHNL_STATUS_ERR_NO_MEMORY                   = -18,
        VIRTCHNL_STATUS_ERR_OPCODE_MISMATCH             = -38,
        VIRTCHNL_STATUS_ERR_CQP_COMPL_ERROR             = -39,
        VIRTCHNL_STATUS_ERR_INVALID_VF_ID               = -40,
        VIRTCHNL_STATUS_ERR_ADMIN_QUEUE_ERROR           = -53,
        VIRTCHNL_STATUS_ERR_NOT_SUPPORTED               = -64,
};

/* Backward compatibility */
#define VIRTCHNL_ERR_PARAM VIRTCHNL_STATUS_ERR_PARAM
#define VIRTCHNL_STATUS_NOT_SUPPORTED VIRTCHNL_STATUS_ERR_NOT_SUPPORTED

#define VIRTCHNL_LINK_SPEED_2_5GB_SHIFT         0x0
#define VIRTCHNL_LINK_SPEED_100MB_SHIFT         0x1
#define VIRTCHNL_LINK_SPEED_1000MB_SHIFT        0x2
#define VIRTCHNL_LINK_SPEED_10GB_SHIFT          0x3
#define VIRTCHNL_LINK_SPEED_40GB_SHIFT          0x4
#define VIRTCHNL_LINK_SPEED_20GB_SHIFT          0x5
#define VIRTCHNL_LINK_SPEED_25GB_SHIFT          0x6
#define VIRTCHNL_LINK_SPEED_5GB_SHIFT           0x7

enum virtchnl_link_speed {
        VIRTCHNL_LINK_SPEED_UNKNOWN     = 0,
        VIRTCHNL_LINK_SPEED_100MB       = BIT(VIRTCHNL_LINK_SPEED_100MB_SHIFT),
        VIRTCHNL_LINK_SPEED_1GB         = BIT(VIRTCHNL_LINK_SPEED_1000MB_SHIFT),
        VIRTCHNL_LINK_SPEED_10GB        = BIT(VIRTCHNL_LINK_SPEED_10GB_SHIFT),
        VIRTCHNL_LINK_SPEED_40GB        = BIT(VIRTCHNL_LINK_SPEED_40GB_SHIFT),
        VIRTCHNL_LINK_SPEED_20GB        = BIT(VIRTCHNL_LINK_SPEED_20GB_SHIFT),
        VIRTCHNL_LINK_SPEED_25GB        = BIT(VIRTCHNL_LINK_SPEED_25GB_SHIFT),
        VIRTCHNL_LINK_SPEED_2_5GB       = BIT(VIRTCHNL_LINK_SPEED_2_5GB_SHIFT),
        VIRTCHNL_LINK_SPEED_5GB         = BIT(VIRTCHNL_LINK_SPEED_5GB_SHIFT),
};

/* for hsplit_0 field of Rx HMC context */
/* deprecated with IAVF 1.0 */
enum virtchnl_rx_hsplit {
        VIRTCHNL_RX_HSPLIT_NO_SPLIT      = 0,
        VIRTCHNL_RX_HSPLIT_SPLIT_L2      = 1,
        VIRTCHNL_RX_HSPLIT_SPLIT_IP      = 2,
        VIRTCHNL_RX_HSPLIT_SPLIT_TCP_UDP = 4,
        VIRTCHNL_RX_HSPLIT_SPLIT_SCTP    = 8,
};

#define VIRTCHNL_ETH_LENGTH_OF_ADDRESS  6
/* END GENERIC DEFINES */

/* Opcodes for VF-PF communication. These are placed in the v_opcode field
 * of the virtchnl_msg structure.
 */
enum virtchnl_ops {
/* The PF sends status change events to VFs using
 * the VIRTCHNL_OP_EVENT opcode.
 * VFs send requests to the PF using the other ops.
 * Use of "advanced opcode" features must be negotiated as part of capabilities
 * exchange and are not considered part of base mode feature set.
 */
        VIRTCHNL_OP_UNKNOWN = 0,
        VIRTCHNL_OP_VERSION = 1, /* must ALWAYS be 1 */
        VIRTCHNL_OP_RESET_VF = 2,
        VIRTCHNL_OP_GET_VF_RESOURCES = 3,
        VIRTCHNL_OP_CONFIG_TX_QUEUE = 4,
        VIRTCHNL_OP_CONFIG_RX_QUEUE = 5,
        VIRTCHNL_OP_CONFIG_VSI_QUEUES = 6,
        VIRTCHNL_OP_CONFIG_IRQ_MAP = 7,
        VIRTCHNL_OP_ENABLE_QUEUES = 8,
        VIRTCHNL_OP_DISABLE_QUEUES = 9,
        VIRTCHNL_OP_ADD_ETH_ADDR = 10,
        VIRTCHNL_OP_DEL_ETH_ADDR = 11,
        VIRTCHNL_OP_ADD_VLAN = 12,
        VIRTCHNL_OP_DEL_VLAN = 13,
        VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE = 14,
        VIRTCHNL_OP_GET_STATS = 15,
        VIRTCHNL_OP_RSVD = 16,
        VIRTCHNL_OP_EVENT = 17, /* must ALWAYS be 17 */
        /* opcode 19 is reserved */
        /* opcodes 20, 21, and 22 are reserved */
        VIRTCHNL_OP_CONFIG_RSS_KEY = 23,
        VIRTCHNL_OP_CONFIG_RSS_LUT = 24,
        VIRTCHNL_OP_GET_RSS_HENA_CAPS = 25,
        VIRTCHNL_OP_SET_RSS_HENA = 26,
        VIRTCHNL_OP_ENABLE_VLAN_STRIPPING = 27,
        VIRTCHNL_OP_DISABLE_VLAN_STRIPPING = 28,
        VIRTCHNL_OP_REQUEST_QUEUES = 29,
        VIRTCHNL_OP_ENABLE_CHANNELS = 30,
        VIRTCHNL_OP_DISABLE_CHANNELS = 31,
        VIRTCHNL_OP_ADD_CLOUD_FILTER = 32,
        VIRTCHNL_OP_DEL_CLOUD_FILTER = 33,
        /* opcodes 34, 35, 36, and 37 are reserved */
        VIRTCHNL_OP_DCF_VLAN_OFFLOAD = 38,
        VIRTCHNL_OP_DCF_CMD_DESC = 39,
        VIRTCHNL_OP_DCF_CMD_BUFF = 40,
        VIRTCHNL_OP_DCF_DISABLE = 41,
        VIRTCHNL_OP_DCF_GET_VSI_MAP = 42,
        VIRTCHNL_OP_DCF_GET_PKG_INFO = 43,
        VIRTCHNL_OP_GET_SUPPORTED_RXDIDS = 44,
        VIRTCHNL_OP_ADD_RSS_CFG = 45,
        VIRTCHNL_OP_DEL_RSS_CFG = 46,
        VIRTCHNL_OP_ADD_FDIR_FILTER = 47,
        VIRTCHNL_OP_DEL_FDIR_FILTER = 48,
        VIRTCHNL_OP_QUERY_FDIR_FILTER = 49,
        VIRTCHNL_OP_GET_MAX_RSS_QREGION = 50,
        VIRTCHNL_OP_GET_OFFLOAD_VLAN_V2_CAPS = 51,
        VIRTCHNL_OP_ADD_VLAN_V2 = 52,
        VIRTCHNL_OP_DEL_VLAN_V2 = 53,
        VIRTCHNL_OP_ENABLE_VLAN_STRIPPING_V2 = 54,
        VIRTCHNL_OP_DISABLE_VLAN_STRIPPING_V2 = 55,
        VIRTCHNL_OP_ENABLE_VLAN_INSERTION_V2 = 56,
        VIRTCHNL_OP_DISABLE_VLAN_INSERTION_V2 = 57,
        VIRTCHNL_OP_ENABLE_VLAN_FILTERING_V2 = 58,
        VIRTCHNL_OP_DISABLE_VLAN_FILTERING_V2 = 59,
        VIRTCHNL_OP_ENABLE_QUEUES_V2 = 107,
        VIRTCHNL_OP_DISABLE_QUEUES_V2 = 108,
        VIRTCHNL_OP_MAP_QUEUE_VECTOR = 111,
        VIRTCHNL_OP_MAX,
};

static inline const char *virtchnl_op_str(enum virtchnl_ops v_opcode)
{
        switch (v_opcode) {
        case VIRTCHNL_OP_UNKNOWN:
                return "VIRTCHNL_OP_UNKNOWN";
        case VIRTCHNL_OP_VERSION:
                return "VIRTCHNL_OP_VERSION";
        case VIRTCHNL_OP_RESET_VF:
                return "VIRTCHNL_OP_RESET_VF";
        case VIRTCHNL_OP_GET_VF_RESOURCES:
                return "VIRTCHNL_OP_GET_VF_RESOURCES";
        case VIRTCHNL_OP_CONFIG_TX_QUEUE:
                return "VIRTCHNL_OP_CONFIG_TX_QUEUE";
        case VIRTCHNL_OP_CONFIG_RX_QUEUE:
                return "VIRTCHNL_OP_CONFIG_RX_QUEUE";
        case VIRTCHNL_OP_CONFIG_VSI_QUEUES:
                return "VIRTCHNL_OP_CONFIG_VSI_QUEUES";
        case VIRTCHNL_OP_CONFIG_IRQ_MAP:
                return "VIRTCHNL_OP_CONFIG_IRQ_MAP";
        case VIRTCHNL_OP_ENABLE_QUEUES:
                return "VIRTCHNL_OP_ENABLE_QUEUES";
        case VIRTCHNL_OP_DISABLE_QUEUES:
                return "VIRTCHNL_OP_DISABLE_QUEUES";
        case VIRTCHNL_OP_ADD_ETH_ADDR:
                return "VIRTCHNL_OP_ADD_ETH_ADDR";
        case VIRTCHNL_OP_DEL_ETH_ADDR:
                return "VIRTCHNL_OP_DEL_ETH_ADDR";
        case VIRTCHNL_OP_ADD_VLAN:
                return "VIRTCHNL_OP_ADD_VLAN";
        case VIRTCHNL_OP_DEL_VLAN:
                return "VIRTCHNL_OP_DEL_VLAN";
        case VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE:
                return "VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE";
        case VIRTCHNL_OP_GET_STATS:
                return "VIRTCHNL_OP_GET_STATS";
        case VIRTCHNL_OP_RSVD:
                return "VIRTCHNL_OP_RSVD";
        case VIRTCHNL_OP_EVENT:
                return "VIRTCHNL_OP_EVENT";
        case VIRTCHNL_OP_CONFIG_RSS_KEY:
                return "VIRTCHNL_OP_CONFIG_RSS_KEY";
        case VIRTCHNL_OP_CONFIG_RSS_LUT:
                return "VIRTCHNL_OP_CONFIG_RSS_LUT";
        case VIRTCHNL_OP_GET_RSS_HENA_CAPS:
                return "VIRTCHNL_OP_GET_RSS_HENA_CAPS";
        case VIRTCHNL_OP_SET_RSS_HENA:
                return "VIRTCHNL_OP_SET_RSS_HENA";
        case VIRTCHNL_OP_ENABLE_VLAN_STRIPPING:
                return "VIRTCHNL_OP_ENABLE_VLAN_STRIPPING";
        case VIRTCHNL_OP_DISABLE_VLAN_STRIPPING:
                return "VIRTCHNL_OP_DISABLE_VLAN_STRIPPING";
        case VIRTCHNL_OP_REQUEST_QUEUES:
                return "VIRTCHNL_OP_REQUEST_QUEUES";
        case VIRTCHNL_OP_ENABLE_CHANNELS:
                return "VIRTCHNL_OP_ENABLE_CHANNELS";
        case VIRTCHNL_OP_DISABLE_CHANNELS:
                return "VIRTCHNL_OP_DISABLE_CHANNELS";
        case VIRTCHNL_OP_ADD_CLOUD_FILTER:
                return "VIRTCHNL_OP_ADD_CLOUD_FILTER";
        case VIRTCHNL_OP_DEL_CLOUD_FILTER:
                return "VIRTCHNL_OP_DEL_CLOUD_FILTER";
        case VIRTCHNL_OP_DCF_CMD_DESC:
                return "VIRTCHNL_OP_DCF_CMD_DESC";
        case VIRTCHNL_OP_DCF_CMD_BUFF:
                return "VIRTCHHNL_OP_DCF_CMD_BUFF";
        case VIRTCHNL_OP_DCF_DISABLE:
                return "VIRTCHNL_OP_DCF_DISABLE";
        case VIRTCHNL_OP_DCF_GET_VSI_MAP:
                return "VIRTCHNL_OP_DCF_GET_VSI_MAP";
        case VIRTCHNL_OP_GET_SUPPORTED_RXDIDS:
                return "VIRTCHNL_OP_GET_SUPPORTED_RXDIDS";
        case VIRTCHNL_OP_ADD_RSS_CFG:
                return "VIRTCHNL_OP_ADD_RSS_CFG";
        case VIRTCHNL_OP_DEL_RSS_CFG:
                return "VIRTCHNL_OP_DEL_RSS_CFG";
        case VIRTCHNL_OP_ADD_FDIR_FILTER:
                return "VIRTCHNL_OP_ADD_FDIR_FILTER";
        case VIRTCHNL_OP_DEL_FDIR_FILTER:
                return "VIRTCHNL_OP_DEL_FDIR_FILTER";
        case VIRTCHNL_OP_QUERY_FDIR_FILTER:
                return "VIRTCHNL_OP_QUERY_FDIR_FILTER";
        case VIRTCHNL_OP_GET_MAX_RSS_QREGION:
                return "VIRTCHNL_OP_GET_MAX_RSS_QREGION";
        case VIRTCHNL_OP_ENABLE_QUEUES_V2:
                return "VIRTCHNL_OP_ENABLE_QUEUES_V2";
        case VIRTCHNL_OP_DISABLE_QUEUES_V2:
                return "VIRTCHNL_OP_DISABLE_QUEUES_V2";
        case VIRTCHNL_OP_MAP_QUEUE_VECTOR:
                return "VIRTCHNL_OP_MAP_QUEUE_VECTOR";
        case VIRTCHNL_OP_GET_OFFLOAD_VLAN_V2_CAPS:
                return "VIRTCHNL_OP_GET_OFFLOAD_VLAN_V2_CAPS";
        case VIRTCHNL_OP_ADD_VLAN_V2:
                return "VIRTCHNL_OP_ADD_VLAN_V2";
        case VIRTCHNL_OP_DEL_VLAN_V2:
                return "VIRTCHNL_OP_DEL_VLAN_V2";
        case VIRTCHNL_OP_ENABLE_VLAN_STRIPPING_V2:
                return "VIRTCHNL_OP_ENABLE_VLAN_STRIPPING_V2";
        case VIRTCHNL_OP_DISABLE_VLAN_STRIPPING_V2:
                return "VIRTCHNL_OP_DISABLE_VLAN_STRIPPING_V2";
        case VIRTCHNL_OP_ENABLE_VLAN_INSERTION_V2:
                return "VIRTCHNL_OP_ENABLE_VLAN_INSERTION_V2";
        case VIRTCHNL_OP_DISABLE_VLAN_INSERTION_V2:
                return "VIRTCHNL_OP_DISABLE_VLAN_INSERTION_V2";
        case VIRTCHNL_OP_ENABLE_VLAN_FILTERING_V2:
                return "VIRTCHNL_OP_ENABLE_VLAN_FILTERING_V2";
        case VIRTCHNL_OP_DISABLE_VLAN_FILTERING_V2:
                return "VIRTCHNL_OP_DISABLE_VLAN_FILTERING_V2";
        case VIRTCHNL_OP_MAX:
                return "VIRTCHNL_OP_MAX";
        default:
                return "Unsupported (update virtchnl.h)";
        }
}

/* These macros are used to generate compilation errors if a structure/union
 * is not exactly the correct length. It gives a divide by zero error if the
 * structure/union is not of the correct size, otherwise it creates an enum
 * that is never used.
 */
#define VIRTCHNL_CHECK_STRUCT_LEN(n, X) enum virtchnl_static_assert_enum_##X \
        { virtchnl_static_assert_##X = (n)/((sizeof(struct X) == (n)) ? 1 : 0) }
#define VIRTCHNL_CHECK_UNION_LEN(n, X) enum virtchnl_static_asset_enum_##X \
        { virtchnl_static_assert_##X = (n)/((sizeof(union X) == (n)) ? 1 : 0) }

/* Virtual channel message descriptor. This overlays the admin queue
 * descriptor. All other data is passed in external buffers.
 */

struct virtchnl_msg {
        u8 pad[8];                       /* AQ flags/opcode/len/retval fields */
        enum virtchnl_ops v_opcode; /* avoid confusion with desc->opcode */
        enum virtchnl_status_code v_retval;  /* ditto for desc->retval */
        u32 vfid;                        /* used by PF when sending to VF */
};

VIRTCHNL_CHECK_STRUCT_LEN(20, virtchnl_msg);

/* Message descriptions and data structures. */

/* VIRTCHNL_OP_VERSION
 * VF posts its version number to the PF. PF responds with its version number
 * in the same format, along with a return code.
 * Reply from PF has its major/minor versions also in param0 and param1.
 * If there is a major version mismatch, then the VF cannot operate.
 * If there is a minor version mismatch, then the VF can operate but should
 * add a warning to the system log.
 *
 * This enum element MUST always be specified as == 1, regardless of other
 * changes in the API. The PF must always respond to this message without
 * error regardless of version mismatch.
 */
#define VIRTCHNL_VERSION_MAJOR          1
#define VIRTCHNL_VERSION_MINOR          1
#define VIRTCHNL_VERSION_MINOR_NO_VF_CAPS       0

struct virtchnl_version_info {
        u32 major;
        u32 minor;
};

VIRTCHNL_CHECK_STRUCT_LEN(8, virtchnl_version_info);

#define VF_IS_V10(_v) (((_v)->major == 1) && ((_v)->minor == 0))
#define VF_IS_V11(_ver) (((_ver)->major == 1) && ((_ver)->minor == 1))

/* VIRTCHNL_OP_RESET_VF
 * VF sends this request to PF with no parameters
 * PF does NOT respond! VF driver must delay then poll VFGEN_RSTAT register
 * until reset completion is indicated. The admin queue must be reinitialized
 * after this operation.
 *
 * When reset is complete, PF must ensure that all queues in all VSIs associated
 * with the VF are stopped, all queue configurations in the HMC are set to 0,
 * and all MAC and VLAN filters (except the default MAC address) on all VSIs
 * are cleared.
 */

/* VSI types that use VIRTCHNL interface for VF-PF communication. VSI_SRIOV
 * vsi_type should always be 6 for backward compatibility. Add other fields
 * as needed.
 */
enum virtchnl_vsi_type {
        VIRTCHNL_VSI_TYPE_INVALID = 0,
        VIRTCHNL_VSI_SRIOV = 6,
};

/* VIRTCHNL_OP_GET_VF_RESOURCES
 * Version 1.0 VF sends this request to PF with no parameters
 * Version 1.1 VF sends this request to PF with u32 bitmap of its capabilities
 * PF responds with an indirect message containing
 * virtchnl_vf_resource and one or more
 * virtchnl_vsi_resource structures.
 */

struct virtchnl_vsi_resource {
        u16 vsi_id;
        u16 num_queue_pairs;
        enum virtchnl_vsi_type vsi_type;
        u16 qset_handle;
        u8 default_mac_addr[VIRTCHNL_ETH_LENGTH_OF_ADDRESS];
};

VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_vsi_resource);

/* VF capability flags
 * VIRTCHNL_VF_OFFLOAD_L2 flag is inclusive of base mode L2 offloads including
 * TX/RX Checksum offloading and TSO for non-tunnelled packets.
 */
#define VIRTCHNL_VF_OFFLOAD_L2                  0x00000001
#define VIRTCHNL_VF_OFFLOAD_IWARP               0x00000002
#define VIRTCHNL_VF_OFFLOAD_RSVD                0x00000004
#define VIRTCHNL_VF_OFFLOAD_RSS_AQ              0x00000008
#define VIRTCHNL_VF_OFFLOAD_RSS_REG             0x00000010
#define VIRTCHNL_VF_OFFLOAD_WB_ON_ITR           0x00000020
#define VIRTCHNL_VF_OFFLOAD_REQ_QUEUES          0x00000040
#define VIRTCHNL_VF_OFFLOAD_CRC                 0x00000080
        /* 0X00000100 is reserved */
#define VIRTCHNL_VF_LARGE_NUM_QPAIRS            0x00000200
#define VIRTCHNL_VF_OFFLOAD_VLAN_V2             0x00008000
#define VIRTCHNL_VF_OFFLOAD_VLAN                0x00010000
#define VIRTCHNL_VF_OFFLOAD_RX_POLLING          0x00020000
#define VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2       0x00040000
#define VIRTCHNL_VF_OFFLOAD_RSS_PF              0X00080000
#define VIRTCHNL_VF_OFFLOAD_ENCAP               0X00100000
#define VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM          0X00200000
#define VIRTCHNL_VF_OFFLOAD_RX_ENCAP_CSUM       0X00400000
#define VIRTCHNL_VF_OFFLOAD_ADQ                 0X00800000
#define VIRTCHNL_VF_OFFLOAD_ADQ_V2              0X01000000
#define VIRTCHNL_VF_OFFLOAD_USO                 0X02000000
#define VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC        0X04000000
#define VIRTCHNL_VF_OFFLOAD_ADV_RSS_PF          0X08000000
#define VIRTCHNL_VF_OFFLOAD_FDIR_PF             0X10000000
        /* 0X20000000 is reserved */
#define VIRTCHNL_VF_CAP_DCF                     0X40000000
        /* 0X80000000 is reserved */

/* Define below the capability flags that are not offloads */
#define VIRTCHNL_VF_CAP_ADV_LINK_SPEED          0x00000080
#define VF_BASE_MODE_OFFLOADS (VIRTCHNL_VF_OFFLOAD_L2 | \
                               VIRTCHNL_VF_OFFLOAD_VLAN | \
                               VIRTCHNL_VF_OFFLOAD_RSS_PF)

struct virtchnl_vf_resource {
        u16 num_vsis;
        u16 num_queue_pairs;
        u16 max_vectors;
        u16 max_mtu;

        u32 vf_cap_flags;
        u32 rss_key_size;
        u32 rss_lut_size;

        struct virtchnl_vsi_resource vsi_res[1];
};

VIRTCHNL_CHECK_STRUCT_LEN(36, virtchnl_vf_resource);

/* VIRTCHNL_OP_CONFIG_TX_QUEUE
 * VF sends this message to set up parameters for one TX queue.
 * External data buffer contains one instance of virtchnl_txq_info.
 * PF configures requested queue and returns a status code.
 */

/* Tx queue config info */
struct virtchnl_txq_info {
        u16 vsi_id;
        u16 queue_id;
        u16 ring_len;           /* number of descriptors, multiple of 8 */
        u16 headwb_enabled; /* deprecated with AVF 1.0 */
        u64 dma_ring_addr;
        u64 dma_headwb_addr; /* deprecated with AVF 1.0 */
};

VIRTCHNL_CHECK_STRUCT_LEN(24, virtchnl_txq_info);

/* VIRTCHNL_OP_CONFIG_RX_QUEUE
 * VF sends this message to set up parameters for one RX queue.
 * External data buffer contains one instance of virtchnl_rxq_info.
 * PF configures requested queue and returns a status code. The
 * crc_disable flag disables CRC stripping on the VF. Setting
 * the crc_disable flag to 1 will disable CRC stripping for each
 * queue in the VF where the flag is set. The VIRTCHNL_VF_OFFLOAD_CRC
 * offload must have been set prior to sending this info or the PF
 * will ignore the request. This flag should be set the same for
 * all of the queues for a VF.
 */

/* Rx queue config info */
struct virtchnl_rxq_info {
        u16 vsi_id;
        u16 queue_id;
        u32 ring_len;           /* number of descriptors, multiple of 32 */
        u16 hdr_size;
        u16 splithdr_enabled; /* deprecated with AVF 1.0 */
        u32 databuffer_size;
        u32 max_pkt_size;
        u8 crc_disable;
        /* only used when VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC is supported */
        u8 rxdid;
        u8 pad1[2];
        u64 dma_ring_addr;
        enum virtchnl_rx_hsplit rx_split_pos; /* deprecated with AVF 1.0 */
        u32 pad2;
};

VIRTCHNL_CHECK_STRUCT_LEN(40, virtchnl_rxq_info);

/* VIRTCHNL_OP_CONFIG_VSI_QUEUES
 * VF sends this message to set parameters for active TX and RX queues
 * associated with the specified VSI.
 * PF configures queues and returns status.
 * If the number of queues specified is greater than the number of queues
 * associated with the VSI, an error is returned and no queues are configured.
 * NOTE: The VF is not required to configure all queues in a single request.
 * It may send multiple messages. PF drivers must correctly handle all VF
 * requests.
 */
struct virtchnl_queue_pair_info {
        /* NOTE: vsi_id and queue_id should be identical for both queues. */
        struct virtchnl_txq_info txq;
        struct virtchnl_rxq_info rxq;
};

VIRTCHNL_CHECK_STRUCT_LEN(64, virtchnl_queue_pair_info);

struct virtchnl_vsi_queue_config_info {
        u16 vsi_id;
        u16 num_queue_pairs;
        u32 pad;
        struct virtchnl_queue_pair_info qpair[1];
};

VIRTCHNL_CHECK_STRUCT_LEN(72, virtchnl_vsi_queue_config_info);

/* VIRTCHNL_OP_REQUEST_QUEUES
 * VF sends this message to request the PF to allocate additional queues to
 * this VF.  Each VF gets a guaranteed number of queues on init but asking for
 * additional queues must be negotiated.  This is a best effort request as it
 * is possible the PF does not have enough queues left to support the request.
 * If the PF cannot support the number requested it will respond with the
 * maximum number it is able to support.  If the request is successful, PF will
 * then reset the VF to institute required changes.
 */

/* VF resource request */
struct virtchnl_vf_res_request {
        u16 num_queue_pairs;
};

/* VIRTCHNL_OP_CONFIG_IRQ_MAP
 * VF uses this message to map vectors to queues.
 * The rxq_map and txq_map fields are bitmaps used to indicate which queues
 * are to be associated with the specified vector.
 * The "other" causes are always mapped to vector 0. The VF may not request
 * that vector 0 be used for traffic.
 * PF configures interrupt mapping and returns status.
 * NOTE: due to hardware requirements, all active queues (both TX and RX)
 * should be mapped to interrupts, even if the driver intends to operate
 * only in polling mode. In this case the interrupt may be disabled, but
 * the ITR timer will still run to trigger writebacks.
 */
struct virtchnl_vector_map {
        u16 vsi_id;
        u16 vector_id;
        u16 rxq_map;
        u16 txq_map;
        u16 rxitr_idx;
        u16 txitr_idx;
};

VIRTCHNL_CHECK_STRUCT_LEN(12, virtchnl_vector_map);

struct virtchnl_irq_map_info {
        u16 num_vectors;
        struct virtchnl_vector_map vecmap[1];
};

VIRTCHNL_CHECK_STRUCT_LEN(14, virtchnl_irq_map_info);

/* VIRTCHNL_OP_ENABLE_QUEUES
 * VIRTCHNL_OP_DISABLE_QUEUES
 * VF sends these message to enable or disable TX/RX queue pairs.
 * The queues fields are bitmaps indicating which queues to act upon.
 * (Currently, we only support 16 queues per VF, but we make the field
 * u32 to allow for expansion.)
 * PF performs requested action and returns status.
 * NOTE: The VF is not required to enable/disable all queues in a single
 * request. It may send multiple messages.
 * PF drivers must correctly handle all VF requests.
 */
struct virtchnl_queue_select {
        u16 vsi_id;
        u16 pad;
        u32 rx_queues;
        u32 tx_queues;
};

VIRTCHNL_CHECK_STRUCT_LEN(12, virtchnl_queue_select);

/* VIRTCHNL_OP_GET_MAX_RSS_QREGION
 *
 * if VIRTCHNL_VF_LARGE_NUM_QPAIRS was negotiated in VIRTCHNL_OP_GET_VF_RESOURCES
 * then this op must be supported.
 *
 * VF sends this message in order to query the max RSS queue region
 * size supported by PF, when VIRTCHNL_VF_LARGE_NUM_QPAIRS is enabled.
 * This information should be used when configuring the RSS LUT and/or
 * configuring queue region based filters.
 *
 * The maximum RSS queue region is 2^qregion_width. So, a qregion_width
 * of 6 would inform the VF that the PF supports a maximum RSS queue region
 * of 64.
 *
 * A queue region represents a range of queues that can be used to configure
 * a RSS LUT. For example, if a VF is given 64 queues, but only a max queue
 * region size of 16 (i.e. 2^qregion_width = 16) then it will only be able
 * to configure the RSS LUT with queue indices from 0 to 15. However, other
 * filters can be used to direct packets to queues >15 via specifying a queue
 * base/offset and queue region width.
 */
struct virtchnl_max_rss_qregion {
        u16 vport_id;
        u16 qregion_width;
        u8 pad[4];
};

VIRTCHNL_CHECK_STRUCT_LEN(8, virtchnl_max_rss_qregion);

/* VIRTCHNL_OP_ADD_ETH_ADDR
 * VF sends this message in order to add one or more unicast or multicast
 * address filters for the specified VSI.
 * PF adds the filters and returns status.
 */

/* VIRTCHNL_OP_DEL_ETH_ADDR
 * VF sends this message in order to remove one or more unicast or multicast
 * filters for the specified VSI.
 * PF removes the filters and returns status.
 */

/* VIRTCHNL_ETHER_ADDR_LEGACY
 * Prior to adding the @type member to virtchnl_ether_addr, there were 2 pad
 * bytes. Moving forward all VF drivers should not set type to
 * VIRTCHNL_ETHER_ADDR_LEGACY. This is only here to not break previous/legacy
 * behavior. The control plane function (i.e. PF) can use a best effort method
 * of tracking the primary/device unicast in this case, but there is no
 * guarantee and functionality depends on the implementation of the PF.
 */

/* VIRTCHNL_ETHER_ADDR_PRIMARY
 * All VF drivers should set @type to VIRTCHNL_ETHER_ADDR_PRIMARY for the
 * primary/device unicast MAC address filter for VIRTCHNL_OP_ADD_ETH_ADDR and
 * VIRTCHNL_OP_DEL_ETH_ADDR. This allows for the underlying control plane
 * function (i.e. PF) to accurately track and use this MAC address for
 * displaying on the host and for VM/function reset.
 */

/* VIRTCHNL_ETHER_ADDR_EXTRA
 * All VF drivers should set @type to VIRTCHNL_ETHER_ADDR_EXTRA for any extra
 * unicast and/or multicast filters that are being added/deleted via
 * VIRTCHNL_OP_DEL_ETH_ADDR/VIRTCHNL_OP_ADD_ETH_ADDR respectively.
 */
struct virtchnl_ether_addr {
        u8 addr[VIRTCHNL_ETH_LENGTH_OF_ADDRESS];
        u8 type;
#define VIRTCHNL_ETHER_ADDR_LEGACY      0
#define VIRTCHNL_ETHER_ADDR_PRIMARY     1
#define VIRTCHNL_ETHER_ADDR_EXTRA       2
#define VIRTCHNL_ETHER_ADDR_TYPE_MASK   3 /* first two bits of type are valid */
        u8 pad;
};

VIRTCHNL_CHECK_STRUCT_LEN(8, virtchnl_ether_addr);

struct virtchnl_ether_addr_list {
        u16 vsi_id;
        u16 num_elements;
        struct virtchnl_ether_addr list[1];
};

VIRTCHNL_CHECK_STRUCT_LEN(12, virtchnl_ether_addr_list);

/* VIRTCHNL_OP_ADD_VLAN
 * VF sends this message to add one or more VLAN tag filters for receives.
 * PF adds the filters and returns status.
 * If a port VLAN is configured by the PF, this operation will return an
 * error to the VF.
 */

/* VIRTCHNL_OP_DEL_VLAN
 * VF sends this message to remove one or more VLAN tag filters for receives.
 * PF removes the filters and returns status.
 * If a port VLAN is configured by the PF, this operation will return an
 * error to the VF.
 */

struct virtchnl_vlan_filter_list {
        u16 vsi_id;
        u16 num_elements;
        u16 vlan_id[1];
};

VIRTCHNL_CHECK_STRUCT_LEN(6, virtchnl_vlan_filter_list);

/* This enum is used for all of the VIRTCHNL_VF_OFFLOAD_VLAN_V2_CAPS related
 * structures and opcodes.
 *
 * VIRTCHNL_VLAN_UNSUPPORTED - This field is not supported and if a VF driver
 * populates it the PF should return VIRTCHNL_STATUS_ERR_NOT_SUPPORTED.
 *
 * VIRTCHNL_VLAN_ETHERTYPE_8100 - This field supports 0x8100 ethertype.
 * VIRTCHNL_VLAN_ETHERTYPE_88A8 - This field supports 0x88A8 ethertype.
 * VIRTCHNL_VLAN_ETHERTYPE_9100 - This field supports 0x9100 ethertype.
 *
 * VIRTCHNL_VLAN_ETHERTYPE_AND - Used when multiple ethertypes can be supported
 * by the PF concurrently. For example, if the PF can support
 * VIRTCHNL_VLAN_ETHERTYPE_8100 AND VIRTCHNL_VLAN_ETHERTYPE_88A8 filters it
 * would OR the following bits:
 *
 *      VIRTHCNL_VLAN_ETHERTYPE_8100 |
 *      VIRTCHNL_VLAN_ETHERTYPE_88A8 |
 *      VIRTCHNL_VLAN_ETHERTYPE_AND;
 *
 * The VF would interpret this as VLAN filtering can be supported on both 0x8100
 * and 0x88A8 VLAN ethertypes.
 *
 * VIRTCHNL_ETHERTYPE_XOR - Used when only a single ethertype can be supported
 * by the PF concurrently. For example if the PF can support
 * VIRTCHNL_VLAN_ETHERTYPE_8100 XOR VIRTCHNL_VLAN_ETHERTYPE_88A8 stripping
 * offload it would OR the following bits:
 *
 *      VIRTCHNL_VLAN_ETHERTYPE_8100 |
 *      VIRTCHNL_VLAN_ETHERTYPE_88A8 |
 *      VIRTCHNL_VLAN_ETHERTYPE_XOR;
 *
 * The VF would interpret this as VLAN stripping can be supported on either
 * 0x8100 or 0x88a8 VLAN ethertypes. So when requesting VLAN stripping via
 * VIRTCHNL_OP_ENABLE_VLAN_STRIPPING_V2 the specified ethertype will override
 * the previously set value.
 *
 * VIRTCHNL_VLAN_TAG_LOCATION_L2TAG1 - Used to tell the VF to insert and/or
 * strip the VLAN tag using the L2TAG1 field of the Tx/Rx descriptors.
 *
 * VIRTCHNL_VLAN_TAG_LOCATION_L2TAG2 - Used to tell the VF to insert hardware
 * offloaded VLAN tags using the L2TAG2 field of the Tx descriptor.
 *
 * VIRTCHNL_VLAN_TAG_LOCATION_L2TAG2 - Used to tell the VF to strip hardware
 * offloaded VLAN tags using the L2TAG2_2 field of the Rx descriptor.
 *
 * VIRTCHNL_VLAN_PRIO - This field supports VLAN priority bits. This is used for
 * VLAN filtering if the underlying PF supports it.
 *
 * VIRTCHNL_VLAN_TOGGLE_ALLOWED - This field is used to say whether a
 * certain VLAN capability can be toggled. For example if the underlying PF/CP
 * allows the VF to toggle VLAN filtering, stripping, and/or insertion it should
 * set this bit along with the supported ethertypes.
 */
enum virtchnl_vlan_support {
        VIRTCHNL_VLAN_UNSUPPORTED =             0,
        VIRTCHNL_VLAN_ETHERTYPE_8100 =          0x00000001,
        VIRTCHNL_VLAN_ETHERTYPE_88A8 =          0x00000002,
        VIRTCHNL_VLAN_ETHERTYPE_9100 =          0x00000004,
        VIRTCHNL_VLAN_TAG_LOCATION_L2TAG1 =     0x00000100,
        VIRTCHNL_VLAN_TAG_LOCATION_L2TAG2 =     0x00000200,
        VIRTCHNL_VLAN_TAG_LOCATION_L2TAG2_2 =   0x00000400,
        VIRTCHNL_VLAN_PRIO =                    0x01000000,
        VIRTCHNL_VLAN_FILTER_MASK =             0x10000000,
        VIRTCHNL_VLAN_ETHERTYPE_AND =           0x20000000,
        VIRTCHNL_VLAN_ETHERTYPE_XOR =           0x40000000,
        VIRTCHNL_VLAN_TOGGLE =                  0x80000000
};

/* This structure is used as part of the VIRTCHNL_OP_GET_OFFLOAD_VLAN_V2_CAPS
 * for filtering, insertion, and stripping capabilities.
 *
 * If only outer capabilities are supported (for filtering, insertion, and/or
 * stripping) then this refers to the outer most or single VLAN from the VF's
 * perspective.
 *
 * If only inner capabilities are supported (for filtering, insertion, and/or
 * stripping) then this refers to the outer most or single VLAN from the VF's
 * perspective. Functionally this is the same as if only outer capabilities are
 * supported. The VF driver is just forced to use the inner fields when
 * adding/deleting filters and enabling/disabling offloads (if supported).
 *
 * If both outer and inner capabilities are supported (for filtering, insertion,
 * and/or stripping) then outer refers to the outer most or single VLAN and
 * inner refers to the second VLAN, if it exists, in the packet.
 *
 * There is no support for tunneled VLAN offloads, so outer or inner are never
 * referring to a tunneled packet from the VF's perspective.
 */
struct virtchnl_vlan_supported_caps {
        u32 outer;
        u32 inner;
};

/* The PF populates these fields based on the supported VLAN filtering. If a
 * field is VIRTCHNL_VLAN_UNSUPPORTED then it's not supported and the PF will
 * reject any VIRTCHNL_OP_ADD_VLAN_V2 or VIRTCHNL_OP_DEL_VLAN_V2 messages using
 * the unsupported fields.
 *
 * Also, a VF is only allowed to toggle its VLAN filtering setting if the
 * VIRTCHNL_VLAN_TOGGLE bit is set.
 *
 * The ethertype(s) specified in the ethertype_init field are the ethertypes
 * enabled for VLAN filtering. VLAN filtering in this case refers to the outer
 * most VLAN from the VF's perspective. If both inner and outer filtering are
 * allowed then ethertype_init only refers to the outer most VLAN as only
 * VLAN ethertype supported for inner VLAN filtering is
 * VIRTCHNL_VLAN_ETHERTYPE_8100. By default, inner VLAN filtering is disabled
 * when both inner and outer filtering are allowed.
 *
 * The max_filters field tells the VF how many VLAN filters it's allowed to have
 * at any one time. If it exceeds this amount and tries to add another filter,
 * then the request will be rejected by the PF. To prevent failures, the VF
 * should keep track of how many VLAN filters it has added and not attempt to
 * add more than max_filters.
 */
struct virtchnl_vlan_filtering_caps {
        struct virtchnl_vlan_supported_caps filtering_support;
        u32 ethertype_init;
        u16 max_filters;
        u8 pad[2];
};

VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_vlan_filtering_caps);

/* This enum is used for the virtchnl_vlan_offload_caps structure to specify
 * if the PF supports a different ethertype for stripping and insertion.
 *
 * VIRTCHNL_ETHERTYPE_STRIPPING_MATCHES_INSERTION - The ethertype(s) specified
 * for stripping affect the ethertype(s) specified for insertion and visa versa
 * as well. If the VF tries to configure VLAN stripping via
 * VIRTCHNL_OP_ENABLE_VLAN_STRIPPING_V2 with VIRTCHNL_VLAN_ETHERTYPE_8100 then
 * that will be the ethertype for both stripping and insertion.
 *
 * VIRTCHNL_ETHERTYPE_MATCH_NOT_REQUIRED - The ethertype(s) specified for
 * stripping do not affect the ethertype(s) specified for insertion and visa
 * versa.
 */
enum virtchnl_vlan_ethertype_match {
        VIRTCHNL_ETHERTYPE_STRIPPING_MATCHES_INSERTION = 0,
        VIRTCHNL_ETHERTYPE_MATCH_NOT_REQUIRED = 1,
};

/* The PF populates these fields based on the supported VLAN offloads. If a
 * field is VIRTCHNL_VLAN_UNSUPPORTED then it's not supported and the PF will
 * reject any VIRTCHNL_OP_ENABLE_VLAN_STRIPPING_V2 or
 * VIRTCHNL_OP_DISABLE_VLAN_STRIPPING_V2 messages using the unsupported fields.
 *
 * Also, a VF is only allowed to toggle its VLAN offload setting if the
 * VIRTCHNL_VLAN_TOGGLE_ALLOWED bit is set.
 *
 * The VF driver needs to be aware of how the tags are stripped by hardware and
 * inserted by the VF driver based on the level of offload support. The PF will
 * populate these fields based on where the VLAN tags are expected to be
 * offloaded via the VIRTHCNL_VLAN_TAG_LOCATION_* bits. The VF will need to
 * interpret these fields. See the definition of the
 * VIRTCHNL_VLAN_TAG_LOCATION_* bits above the virtchnl_vlan_support
 * enumeration.
 */
struct virtchnl_vlan_offload_caps {
        struct virtchnl_vlan_supported_caps stripping_support;
        struct virtchnl_vlan_supported_caps insertion_support;
        u32 ethertype_init;
        u8 ethertype_match;
        u8 pad[3];
};

VIRTCHNL_CHECK_STRUCT_LEN(24, virtchnl_vlan_offload_caps);

/* VIRTCHNL_OP_GET_OFFLOAD_VLAN_V2_CAPS
 * VF sends this message to determine its VLAN capabilities.
 *
 * PF will mark which capabilities it supports based on hardware support and
 * current configuration. For example, if a port VLAN is configured the PF will
 * not allow outer VLAN filtering, stripping, or insertion to be configured so
 * it will block these features from the VF.
 *
 * The VF will need to cross reference its capabilities with the PFs
 * capabilities in the response message from the PF to determine the VLAN
 * support.
 */
struct virtchnl_vlan_caps {
        struct virtchnl_vlan_filtering_caps filtering;
        struct virtchnl_vlan_offload_caps offloads;
};

VIRTCHNL_CHECK_STRUCT_LEN(40, virtchnl_vlan_caps);

struct virtchnl_vlan {
        u16 tci;        /* tci[15:13] = PCP and tci[11:0] = VID */
        u16 tci_mask;   /* only valid if VIRTCHNL_VLAN_FILTER_MASK set in
                         * filtering caps
                         */
        u16 tpid;       /* 0x8100, 0x88a8, etc. and only type(s) set in
                         * filtering caps. Note that tpid here does not refer to
                         * VIRTCHNL_VLAN_ETHERTYPE_*, but it refers to the
                         * actual 2-byte VLAN TPID
                         */
        u8 pad[2];
};

VIRTCHNL_CHECK_STRUCT_LEN(8, virtchnl_vlan);

struct virtchnl_vlan_filter {
        struct virtchnl_vlan inner;
        struct virtchnl_vlan outer;
        u8 pad[16];
};

VIRTCHNL_CHECK_STRUCT_LEN(32, virtchnl_vlan_filter);

/* VIRTCHNL_OP_ADD_VLAN_V2
 * VIRTCHNL_OP_DEL_VLAN_V2
 *
 * VF sends these messages to add/del one or more VLAN tag filters for Rx
 * traffic.
 *
 * The PF attempts to add the filters and returns status.
 *
 * The VF should only ever attempt to add/del virtchnl_vlan_filter(s) using the
 * supported fields negotiated via VIRTCHNL_OP_GET_OFFLOAD_VLAN_V2_CAPS.
 */
struct virtchnl_vlan_filter_list_v2 {
        u16 vport_id;
        u16 num_elements;
        u8 pad[4];
        struct virtchnl_vlan_filter filters[1];
};

VIRTCHNL_CHECK_STRUCT_LEN(40, virtchnl_vlan_filter_list_v2);

/* VIRTCHNL_OP_ENABLE_VLAN_STRIPPING_V2
 * VIRTCHNL_OP_DISABLE_VLAN_STRIPPING_V2
 * VIRTCHNL_OP_ENABLE_VLAN_INSERTION_V2
 * VIRTCHNL_OP_DISABLE_VLAN_INSERTION_V2
 *
 * VF sends this message to enable or disable VLAN stripping or insertion. It
 * also needs to specify an ethertype. The VF knows which VLAN ethertypes are
 * allowed and whether or not it's allowed to enable/disable the specific
 * offload via the VIRTCHNL_OP_GET_OFFLOAD_VLAN_V2_CAPS message. The VF needs to
 * parse the virtchnl_vlan_caps.offloads fields to determine which offload
 * messages are allowed.
 *
 * For example, if the PF populates the virtchnl_vlan_caps.offloads in the
 * following manner the VF will be allowed to enable and/or disable 0x8100 inner
 * VLAN insertion and/or stripping via the opcodes listed above. Inner in this
 * case means the outer most or single VLAN from the VF's perspective. This is
 * because no outer offloads are supported. See the comments above the
 * virtchnl_vlan_supported_caps structure for more details.
 *
 * virtchnl_vlan_caps.offloads.stripping_support.inner =
 *                      VIRTCHNL_VLAN_TOGGLE |
 *                      VIRTCHNL_VLAN_ETHERTYPE_8100;
 *
 * virtchnl_vlan_caps.offloads.insertion_support.inner =
 *                      VIRTCHNL_VLAN_TOGGLE |
 *                      VIRTCHNL_VLAN_ETHERTYPE_8100;
 *
 * In order to enable inner (again note that in this case inner is the outer
 * most or single VLAN from the VF's perspective) VLAN stripping for 0x8100
 * VLANs, the VF would populate the virtchnl_vlan_setting structure in the
 * following manner and send the VIRTCHNL_OP_ENABLE_VLAN_STRIPPING_V2 message.
 *
 * virtchnl_vlan_setting.inner_ethertype_setting =
 *                      VIRTCHNL_VLAN_ETHERTYPE_8100;
 *
 * virtchnl_vlan_setting.vport_id = vport_id or vsi_id assigned to the VF on
 * initialization.
 *
 * The reason that VLAN TPID(s) are not being used for the
 * outer_ethertype_setting and inner_ethertype_setting fields is because it's
 * possible a device could support VLAN insertion and/or stripping offload on
 * multiple ethertypes concurrently, so this method allows a VF to request
 * multiple ethertypes in one message using the virtchnl_vlan_support
 * enumeration.
 *
 * For example, if the PF populates the virtchnl_vlan_caps.offloads in the
 * following manner the VF will be allowed to enable 0x8100 and 0x88a8 outer
 * VLAN insertion and stripping simultaneously. The
 * virtchnl_vlan_caps.offloads.ethertype_match field will also have to be
 * populated based on what the PF can support.
 *
 * virtchnl_vlan_caps.offloads.stripping_support.outer =
 *                      VIRTCHNL_VLAN_TOGGLE |
 *                      VIRTCHNL_VLAN_ETHERTYPE_8100 |
 *                      VIRTCHNL_VLAN_ETHERTYPE_88A8 |
 *                      VIRTCHNL_VLAN_ETHERTYPE_AND;
 *
 * virtchnl_vlan_caps.offloads.insertion_support.outer =
 *                      VIRTCHNL_VLAN_TOGGLE |
 *                      VIRTCHNL_VLAN_ETHERTYPE_8100 |
 *                      VIRTCHNL_VLAN_ETHERTYPE_88A8 |
 *                      VIRTCHNL_VLAN_ETHERTYPE_AND;
 *
 * In order to enable outer VLAN stripping for 0x8100 and 0x88a8 VLANs, the VF
 * would populate the virthcnl_vlan_offload_structure in the following manner
 * and send the VIRTCHNL_OP_ENABLE_VLAN_STRIPPING_V2 message.
 *
 * virtchnl_vlan_setting.outer_ethertype_setting =
 *                      VIRTHCNL_VLAN_ETHERTYPE_8100 |
 *                      VIRTHCNL_VLAN_ETHERTYPE_88A8;
 *
 * virtchnl_vlan_setting.vport_id = vport_id or vsi_id assigned to the VF on
 * initialization.
 *
 * There is also the case where a PF and the underlying hardware can support
 * VLAN offloads on multiple ethertypes, but not concurrently. For example, if
 * the PF populates the virtchnl_vlan_caps.offloads in the following manner the
 * VF will be allowed to enable and/or disable 0x8100 XOR 0x88a8 outer VLAN
 * offloads. The ethertypes must match for stripping and insertion.
 *
 * virtchnl_vlan_caps.offloads.stripping_support.outer =
 *                      VIRTCHNL_VLAN_TOGGLE |
 *                      VIRTCHNL_VLAN_ETHERTYPE_8100 |
 *                      VIRTCHNL_VLAN_ETHERTYPE_88A8 |
 *                      VIRTCHNL_VLAN_ETHERTYPE_XOR;
 *
 * virtchnl_vlan_caps.offloads.insertion_support.outer =
 *                      VIRTCHNL_VLAN_TOGGLE |
 *                      VIRTCHNL_VLAN_ETHERTYPE_8100 |
 *                      VIRTCHNL_VLAN_ETHERTYPE_88A8 |
 *                      VIRTCHNL_VLAN_ETHERTYPE_XOR;
 *
 * virtchnl_vlan_caps.offloads.ethertype_match =
 *                      VIRTCHNL_ETHERTYPE_STRIPPING_MATCHES_INSERTION;
 *
 * In order to enable outer VLAN stripping for 0x88a8 VLANs, the VF would
 * populate the virtchnl_vlan_setting structure in the following manner and send
 * the VIRTCHNL_OP_ENABLE_VLAN_STRIPPING_V2. Also, this will change the
 * ethertype for VLAN insertion if it's enabled. So, for completeness, a
 * VIRTCHNL_OP_ENABLE_VLAN_INSERTION_V2 with the same ethertype should be sent.
 *
 * virtchnl_vlan_setting.outer_ethertype_setting = VIRTHCNL_VLAN_ETHERTYPE_88A8;
 *
 * virtchnl_vlan_setting.vport_id = vport_id or vsi_id assigned to the VF on
 * initialization.
 *
 * VIRTCHNL_OP_ENABLE_VLAN_FILTERING_V2

 * VIRTCHNL_OP_DISABLE_VLAN_FILTERING_V2
 *
 * VF sends this message to enable or disable VLAN filtering. It also needs to
 * specify an ethertype. The VF knows which VLAN ethertypes are allowed and
 * whether or not it's allowed to enable/disable filtering via the
 * VIRTCHNL_OP_GET_OFFLOAD_VLAN_V2_CAPS message. The VF needs to
 * parse the virtchnl_vlan_caps.filtering fields to determine which, if any,
 * filtering messages are allowed.
 *
 * For example, if the PF populates the virtchnl_vlan_caps.filtering in the
 * following manner the VF will be allowed to enable/disable 0x8100 and 0x88a8
 * outer VLAN filtering together. Note, that the VIRTCHNL_VLAN_ETHERTYPE_AND
 * means that all filtering ethertypes will to be enabled and disabled together
 * regardless of the request from the VF. This means that the underlying
 * hardware only supports VLAN filtering for all VLAN the specified ethertypes
 * or none of them.
 *
 * virtchnl_vlan_caps.filtering.filtering_support.outer =
 *                      VIRTCHNL_VLAN_TOGGLE |
 *                      VIRTCHNL_VLAN_ETHERTYPE_8100 |
 *                      VIRTHCNL_VLAN_ETHERTYPE_88A8 |
 *                      VIRTCHNL_VLAN_ETHERTYPE_9100 |
 *                      VIRTCHNL_VLAN_ETHERTYPE_AND;
 *
 * In order to enable outer VLAN filtering for 0x88a8 and 0x8100 VLANs (0x9100
 * VLANs aren't supported by the VF driver), the VF would populate the
 * virtchnl_vlan_setting structure in the following manner and send the
 * VIRTCHNL_OP_ENABLE_VLAN_FILTERING_V2. The same message format would be used
 * to disable outer VLAN filtering for 0x88a8 and 0x8100 VLANs, but the
 * VIRTCHNL_OP_DISABLE_VLAN_FILTERING_V2 opcode is used.
 *
 * virtchnl_vlan_setting.outer_ethertype_setting =
 *                      VIRTCHNL_VLAN_ETHERTYPE_8100 |
 *                      VIRTCHNL_VLAN_ETHERTYPE_88A8;
 *
 */
struct virtchnl_vlan_setting {
        u32 outer_ethertype_setting;
        u32 inner_ethertype_setting;
        u16 vport_id;
        u8 pad[6];
};

VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_vlan_setting);

/* VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE
 * VF sends VSI id and flags.
 * PF returns status code in retval.
 * Note: we assume that broadcast accept mode is always enabled.
 */
struct virtchnl_promisc_info {
        u16 vsi_id;
        u16 flags;
};

VIRTCHNL_CHECK_STRUCT_LEN(4, virtchnl_promisc_info);

#define FLAG_VF_UNICAST_PROMISC 0x00000001
#define FLAG_VF_MULTICAST_PROMISC       0x00000002

/* VIRTCHNL_OP_GET_STATS
 * VF sends this message to request stats for the selected VSI. VF uses
 * the virtchnl_queue_select struct to specify the VSI. The queue_id
 * field is ignored by the PF.
 *
 * PF replies with struct virtchnl_eth_stats in an external buffer.
 */

struct virtchnl_eth_stats {
        u64 rx_bytes;                   /* received bytes */
        u64 rx_unicast;                 /* received unicast pkts */
        u64 rx_multicast;               /* received multicast pkts */
        u64 rx_broadcast;               /* received broadcast pkts */
        u64 rx_discards;
        u64 rx_unknown_protocol;
        u64 tx_bytes;                   /* transmitted bytes */
        u64 tx_unicast;                 /* transmitted unicast pkts */
        u64 tx_multicast;               /* transmitted multicast pkts */
        u64 tx_broadcast;               /* transmitted broadcast pkts */
        u64 tx_discards;
        u64 tx_errors;
};

/* VIRTCHNL_OP_CONFIG_RSS_KEY
 * VIRTCHNL_OP_CONFIG_RSS_LUT
 * VF sends these messages to configure RSS. Only supported if both PF
 * and VF drivers set the VIRTCHNL_VF_OFFLOAD_RSS_PF bit during
 * configuration negotiation. If this is the case, then the RSS fields in
 * the VF resource struct are valid.
 * Both the key and LUT are initialized to 0 by the PF, meaning that
 * RSS is effectively disabled until set up by the VF.
 */
struct virtchnl_rss_key {
        u16 vsi_id;
        u16 key_len;
        u8 key[1];         /* RSS hash key, packed bytes */
};

VIRTCHNL_CHECK_STRUCT_LEN(6, virtchnl_rss_key);

struct virtchnl_rss_lut {
        u16 vsi_id;
        u16 lut_entries;
        u8 lut[1];        /* RSS lookup table */
};

VIRTCHNL_CHECK_STRUCT_LEN(6, virtchnl_rss_lut);

/* VIRTCHNL_OP_GET_RSS_HENA_CAPS
 * VIRTCHNL_OP_SET_RSS_HENA
 * VF sends these messages to get and set the hash filter enable bits for RSS.
 * By default, the PF sets these to all possible traffic types that the
 * hardware supports. The VF can query this value if it wants to change the
 * traffic types that are hashed by the hardware.
 */
struct virtchnl_rss_hena {
        u64 hena;
};

VIRTCHNL_CHECK_STRUCT_LEN(8, virtchnl_rss_hena);

/* Type of RSS algorithm */
enum virtchnl_rss_algorithm {
        VIRTCHNL_RSS_ALG_TOEPLITZ_ASYMMETRIC    = 0,
        VIRTCHNL_RSS_ALG_XOR_ASYMMETRIC         = 1,
        VIRTCHNL_RSS_ALG_TOEPLITZ_SYMMETRIC     = 2,
        VIRTCHNL_RSS_ALG_XOR_SYMMETRIC          = 3,
};

/* This is used by PF driver to enforce how many channels can be supported.
 * When ADQ_V2 capability is negotiated, it will allow 16 channels otherwise
 * PF driver will allow only max 4 channels
 */
#define VIRTCHNL_MAX_ADQ_CHANNELS 4
#define VIRTCHNL_MAX_ADQ_V2_CHANNELS 16

/* VIRTCHNL_OP_ENABLE_CHANNELS
 * VIRTCHNL_OP_DISABLE_CHANNELS
 * VF sends these messages to enable or disable channels based on
 * the user specified queue count and queue offset for each traffic class.
 * This struct encompasses all the information that the PF needs from
 * VF to create a channel.
 */
struct virtchnl_channel_info {
        u16 count; /* number of queues in a channel */
        u16 offset; /* queues in a channel start from 'offset' */
        u32 pad;
        u64 max_tx_rate;
};

VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_channel_info);

struct virtchnl_tc_info {
        u32     num_tc;
        u32     pad;
        struct  virtchnl_channel_info list[1];
};

VIRTCHNL_CHECK_STRUCT_LEN(24, virtchnl_tc_info);

/* VIRTCHNL_ADD_CLOUD_FILTER
 * VIRTCHNL_DEL_CLOUD_FILTER
 * VF sends these messages to add or delete a cloud filter based on the
 * user specified match and action filters. These structures encompass
 * all the information that the PF needs from the VF to add/delete a
 * cloud filter.
 */

struct virtchnl_l4_spec {
        u8      src_mac[VIRTCHNL_ETH_LENGTH_OF_ADDRESS];
        u8      dst_mac[VIRTCHNL_ETH_LENGTH_OF_ADDRESS];
        /* vlan_prio is part of this 16 bit field even from OS perspective
         * vlan_id:12 is actual vlan_id, then vlanid:bit14..12 is vlan_prio
         * in future, when decided to offload vlan_prio, pass that information
         * as part of the "vlan_id" field, Bit14..12
         */
        __be16  vlan_id;
        __be16  pad; /* reserved for future use */
        __be32  src_ip[4];
        __be32  dst_ip[4];
        __be16  src_port;
        __be16  dst_port;
};

VIRTCHNL_CHECK_STRUCT_LEN(52, virtchnl_l4_spec);

union virtchnl_flow_spec {
        struct  virtchnl_l4_spec tcp_spec;
        u8      buffer[128]; /* reserved for future use */
};

VIRTCHNL_CHECK_UNION_LEN(128, virtchnl_flow_spec);

enum virtchnl_action {
        /* action types */
        VIRTCHNL_ACTION_DROP = 0,
        VIRTCHNL_ACTION_TC_REDIRECT,
        VIRTCHNL_ACTION_PASSTHRU,
        VIRTCHNL_ACTION_QUEUE,
        VIRTCHNL_ACTION_Q_REGION,
        VIRTCHNL_ACTION_MARK,
        VIRTCHNL_ACTION_COUNT,
};

enum virtchnl_flow_type {
        /* flow types */
        VIRTCHNL_TCP_V4_FLOW = 0,
        VIRTCHNL_TCP_V6_FLOW,
        VIRTCHNL_UDP_V4_FLOW,
        VIRTCHNL_UDP_V6_FLOW,
};

struct virtchnl_filter {
        union   virtchnl_flow_spec data;
        union   virtchnl_flow_spec mask;
        enum    virtchnl_flow_type flow_type;
        enum    virtchnl_action action;
        u32     action_meta;
        u8      field_flags;
};

VIRTCHNL_CHECK_STRUCT_LEN(272, virtchnl_filter);

/* VIRTCHNL_OP_DCF_GET_VSI_MAP
 * VF sends this message to get VSI mapping table.
 * PF responds with an indirect message containing VF's
 * HW VSI IDs.
 * The index of vf_vsi array is the logical VF ID, the
 * value of vf_vsi array is the VF's HW VSI ID with its
 * valid configuration.
 */
struct virtchnl_dcf_vsi_map {
        u16 pf_vsi;     /* PF's HW VSI ID */
        u16 num_vfs;    /* The actual number of VFs allocated */
#define VIRTCHNL_DCF_VF_VSI_ID_S        0
#define VIRTCHNL_DCF_VF_VSI_ID_M        (0xFFF << VIRTCHNL_DCF_VF_VSI_ID_S)
#define VIRTCHNL_DCF_VF_VSI_VALID       BIT(15)
        u16 vf_vsi[1];
};

VIRTCHNL_CHECK_STRUCT_LEN(6, virtchnl_dcf_vsi_map);

#define PKG_NAME_SIZE   32
#define DSN_SIZE        8

struct pkg_version {
        u8 major;
        u8 minor;
        u8 update;
        u8 draft;
};

VIRTCHNL_CHECK_STRUCT_LEN(4, pkg_version);

struct virtchnl_pkg_info {
        struct pkg_version pkg_ver;
        u32 track_id;
        char pkg_name[PKG_NAME_SIZE];
        u8 dsn[DSN_SIZE];
};

VIRTCHNL_CHECK_STRUCT_LEN(48, virtchnl_pkg_info);

/* VIRTCHNL_OP_DCF_VLAN_OFFLOAD
 * DCF negotiates the VIRTCHNL_VF_OFFLOAD_VLAN_V2 capability firstly to get
 * the double VLAN configuration, then DCF sends this message to configure the
 * outer or inner VLAN offloads (insertion and strip) for the target VF.
 */
struct virtchnl_dcf_vlan_offload {
        u16 vf_id;
        u16 tpid;
        u16 vlan_flags;
#define VIRTCHNL_DCF_VLAN_TYPE_S                0
#define VIRTCHNL_DCF_VLAN_TYPE_M                \
                        (0x1 << VIRTCHNL_DCF_VLAN_TYPE_S)
#define VIRTCHNL_DCF_VLAN_TYPE_INNER            0x0
#define VIRTCHNL_DCF_VLAN_TYPE_OUTER            0x1
#define VIRTCHNL_DCF_VLAN_INSERT_MODE_S         1
#define VIRTCHNL_DCF_VLAN_INSERT_MODE_M \
                        (0x7 << VIRTCHNL_DCF_VLAN_INSERT_MODE_S)
#define VIRTCHNL_DCF_VLAN_INSERT_DISABLE        0x1
#define VIRTCHNL_DCF_VLAN_INSERT_PORT_BASED     0x2
#define VIRTCHNL_DCF_VLAN_INSERT_VIA_TX_DESC    0x3
#define VIRTCHNL_DCF_VLAN_STRIP_MODE_S          4
#define VIRTCHNL_DCF_VLAN_STRIP_MODE_M          \
                        (0x7 << VIRTCHNL_DCF_VLAN_STRIP_MODE_S)
#define VIRTCHNL_DCF_VLAN_STRIP_DISABLE         0x1
#define VIRTCHNL_DCF_VLAN_STRIP_ONLY            0x2
#define VIRTCHNL_DCF_VLAN_STRIP_INTO_RX_DESC    0x3
        u16 vlan_id;
        u16 pad[4];
};

VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_dcf_vlan_offload);

struct virtchnl_supported_rxdids {
        u64 supported_rxdids;
};

VIRTCHNL_CHECK_STRUCT_LEN(8, virtchnl_supported_rxdids);

/* VIRTCHNL_OP_EVENT
 * PF sends this message to inform the VF driver of events that may affect it.
 * No direct response is expected from the VF, though it may generate other
 * messages in response to this one.
 */
enum virtchnl_event_codes {
        VIRTCHNL_EVENT_UNKNOWN = 0,
        VIRTCHNL_EVENT_LINK_CHANGE,
        VIRTCHNL_EVENT_RESET_IMPENDING,
        VIRTCHNL_EVENT_PF_DRIVER_CLOSE,
        VIRTCHNL_EVENT_DCF_VSI_MAP_UPDATE,
};

#define PF_EVENT_SEVERITY_INFO          0
#define PF_EVENT_SEVERITY_ATTENTION     1
#define PF_EVENT_SEVERITY_ACTION_REQUIRED       2
#define PF_EVENT_SEVERITY_CERTAIN_DOOM  255

struct virtchnl_pf_event {
        enum virtchnl_event_codes event;
        union {
                /* If the PF driver does not support the new speed reporting
                 * capabilities then use link_event else use link_event_adv to
                 * get the speed and link information. The ability to understand
                 * new speeds is indicated by setting the capability flag
                 * VIRTCHNL_VF_CAP_ADV_LINK_SPEED in vf_cap_flags parameter
                 * in virtchnl_vf_resource struct and can be used to determine
                 * which link event struct to use below.
                 */
                struct {
                        enum virtchnl_link_speed link_speed;
                        u8 link_status;
                } link_event;
                struct {
                        /* link_speed provided in Mbps */
                        u32 link_speed;
                        u8 link_status;
                } link_event_adv;
                struct {
                        u16 vf_id;
                        u16 vsi_id;
                } vf_vsi_map;
        } event_data;

        int severity;
};

VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_pf_event);


/* VF reset states - these are written into the RSTAT register:
 * VFGEN_RSTAT on the VF
 * When the PF initiates a reset, it writes 0
 * When the reset is complete, it writes 1
 * When the PF detects that the VF has recovered, it writes 2
 * VF checks this register periodically to determine if a reset has occurred,
 * then polls it to know when the reset is complete.
 * If either the PF or VF reads the register while the hardware
 * is in a reset state, it will return DEADBEEF, which, when masked
 * will result in 3.
 */
enum virtchnl_vfr_states {
        VIRTCHNL_VFR_INPROGRESS = 0,
        VIRTCHNL_VFR_COMPLETED,
        VIRTCHNL_VFR_VFACTIVE,
};

#define VIRTCHNL_MAX_NUM_PROTO_HDRS     32
#define PROTO_HDR_SHIFT                 5
#define PROTO_HDR_FIELD_START(proto_hdr_type) \
                                        (proto_hdr_type << PROTO_HDR_SHIFT)
#define PROTO_HDR_FIELD_MASK ((1UL << PROTO_HDR_SHIFT) - 1)

/* VF use these macros to configure each protocol header.
 * Specify which protocol headers and protocol header fields base on
 * virtchnl_proto_hdr_type and virtchnl_proto_hdr_field.
 * @param hdr: a struct of virtchnl_proto_hdr
 * @param hdr_type: ETH/IPV4/TCP, etc
 * @param field: SRC/DST/TEID/SPI, etc
 */
#define VIRTCHNL_ADD_PROTO_HDR_FIELD(hdr, field) \
        ((hdr)->field_selector |= BIT((field) & PROTO_HDR_FIELD_MASK))
#define VIRTCHNL_DEL_PROTO_HDR_FIELD(hdr, field) \
        ((hdr)->field_selector &= ~BIT((field) & PROTO_HDR_FIELD_MASK))
#define VIRTCHNL_TEST_PROTO_HDR_FIELD(hdr, val) \
        ((hdr)->field_selector & BIT((val) & PROTO_HDR_FIELD_MASK))
#define VIRTCHNL_GET_PROTO_HDR_FIELD(hdr)       ((hdr)->field_selector)

#define VIRTCHNL_ADD_PROTO_HDR_FIELD_BIT(hdr, hdr_type, field) \
        (VIRTCHNL_ADD_PROTO_HDR_FIELD(hdr, \
                VIRTCHNL_PROTO_HDR_ ## hdr_type ## _ ## field))
#define VIRTCHNL_DEL_PROTO_HDR_FIELD_BIT(hdr, hdr_type, field) \
        (VIRTCHNL_DEL_PROTO_HDR_FIELD(hdr, \
                VIRTCHNL_PROTO_HDR_ ## hdr_type ## _ ## field))

#define VIRTCHNL_SET_PROTO_HDR_TYPE(hdr, hdr_type) \
        ((hdr)->type = VIRTCHNL_PROTO_HDR_ ## hdr_type)
#define VIRTCHNL_GET_PROTO_HDR_TYPE(hdr) \
        (((hdr)->type) >> PROTO_HDR_SHIFT)
#define VIRTCHNL_TEST_PROTO_HDR_TYPE(hdr, val) \
        ((hdr)->type == ((val) >> PROTO_HDR_SHIFT))
#define VIRTCHNL_TEST_PROTO_HDR(hdr, val) \
        (VIRTCHNL_TEST_PROTO_HDR_TYPE(hdr, val) && \
         VIRTCHNL_TEST_PROTO_HDR_FIELD(hdr, val))

/* Protocol header type within a packet segment. A segment consists of one or
 * more protocol headers that make up a logical group of protocol headers. Each
 * logical group of protocol headers encapsulates or is encapsulated using/by
 * tunneling or encapsulation protocols for network virtualization.
 */
enum virtchnl_proto_hdr_type {
        VIRTCHNL_PROTO_HDR_NONE,
        VIRTCHNL_PROTO_HDR_ETH,
        VIRTCHNL_PROTO_HDR_S_VLAN,
        VIRTCHNL_PROTO_HDR_C_VLAN,
        VIRTCHNL_PROTO_HDR_IPV4,
        VIRTCHNL_PROTO_HDR_IPV6,
        VIRTCHNL_PROTO_HDR_TCP,
        VIRTCHNL_PROTO_HDR_UDP,
        VIRTCHNL_PROTO_HDR_SCTP,
        VIRTCHNL_PROTO_HDR_GTPU_IP,
        VIRTCHNL_PROTO_HDR_GTPU_EH,
        VIRTCHNL_PROTO_HDR_GTPU_EH_PDU_DWN,
        VIRTCHNL_PROTO_HDR_GTPU_EH_PDU_UP,
        VIRTCHNL_PROTO_HDR_PPPOE,
        VIRTCHNL_PROTO_HDR_L2TPV3,
        VIRTCHNL_PROTO_HDR_ESP,
        VIRTCHNL_PROTO_HDR_AH,
        VIRTCHNL_PROTO_HDR_PFCP,
        VIRTCHNL_PROTO_HDR_GTPC,
        VIRTCHNL_PROTO_HDR_ECPRI,
};

/* Protocol header field within a protocol header. */
enum virtchnl_proto_hdr_field {
        /* ETHER */
        VIRTCHNL_PROTO_HDR_ETH_SRC =
                PROTO_HDR_FIELD_START(VIRTCHNL_PROTO_HDR_ETH),
        VIRTCHNL_PROTO_HDR_ETH_DST,
        VIRTCHNL_PROTO_HDR_ETH_ETHERTYPE,
        /* S-VLAN */
        VIRTCHNL_PROTO_HDR_S_VLAN_ID =
                PROTO_HDR_FIELD_START(VIRTCHNL_PROTO_HDR_S_VLAN),
        /* C-VLAN */
        VIRTCHNL_PROTO_HDR_C_VLAN_ID =
                PROTO_HDR_FIELD_START(VIRTCHNL_PROTO_HDR_C_VLAN),
        /* IPV4 */
        VIRTCHNL_PROTO_HDR_IPV4_SRC =
                PROTO_HDR_FIELD_START(VIRTCHNL_PROTO_HDR_IPV4),
        VIRTCHNL_PROTO_HDR_IPV4_DST,
        VIRTCHNL_PROTO_HDR_IPV4_DSCP,
        VIRTCHNL_PROTO_HDR_IPV4_TTL,
        VIRTCHNL_PROTO_HDR_IPV4_PROT,
        /* IPV6 */
        VIRTCHNL_PROTO_HDR_IPV6_SRC =
                PROTO_HDR_FIELD_START(VIRTCHNL_PROTO_HDR_IPV6),
        VIRTCHNL_PROTO_HDR_IPV6_DST,
        VIRTCHNL_PROTO_HDR_IPV6_TC,
        VIRTCHNL_PROTO_HDR_IPV6_HOP_LIMIT,
        VIRTCHNL_PROTO_HDR_IPV6_PROT,
        /* IPV6 Prefix */
        VIRTCHNL_PROTO_HDR_IPV6_PREFIX32_SRC,
        VIRTCHNL_PROTO_HDR_IPV6_PREFIX32_DST,
        VIRTCHNL_PROTO_HDR_IPV6_PREFIX40_SRC,
        VIRTCHNL_PROTO_HDR_IPV6_PREFIX40_DST,
        VIRTCHNL_PROTO_HDR_IPV6_PREFIX48_SRC,
        VIRTCHNL_PROTO_HDR_IPV6_PREFIX48_DST,
        VIRTCHNL_PROTO_HDR_IPV6_PREFIX56_SRC,
        VIRTCHNL_PROTO_HDR_IPV6_PREFIX56_DST,
        VIRTCHNL_PROTO_HDR_IPV6_PREFIX64_SRC,
        VIRTCHNL_PROTO_HDR_IPV6_PREFIX64_DST,
        VIRTCHNL_PROTO_HDR_IPV6_PREFIX96_SRC,
        VIRTCHNL_PROTO_HDR_IPV6_PREFIX96_DST,
        /* TCP */
        VIRTCHNL_PROTO_HDR_TCP_SRC_PORT =
                PROTO_HDR_FIELD_START(VIRTCHNL_PROTO_HDR_TCP),
        VIRTCHNL_PROTO_HDR_TCP_DST_PORT,
        /* UDP */
        VIRTCHNL_PROTO_HDR_UDP_SRC_PORT =
                PROTO_HDR_FIELD_START(VIRTCHNL_PROTO_HDR_UDP),
        VIRTCHNL_PROTO_HDR_UDP_DST_PORT,
        /* SCTP */
        VIRTCHNL_PROTO_HDR_SCTP_SRC_PORT =
                PROTO_HDR_FIELD_START(VIRTCHNL_PROTO_HDR_SCTP),
        VIRTCHNL_PROTO_HDR_SCTP_DST_PORT,
        /* GTPU_IP */
        VIRTCHNL_PROTO_HDR_GTPU_IP_TEID =
                PROTO_HDR_FIELD_START(VIRTCHNL_PROTO_HDR_GTPU_IP),
        /* GTPU_EH */
        VIRTCHNL_PROTO_HDR_GTPU_EH_PDU =
                PROTO_HDR_FIELD_START(VIRTCHNL_PROTO_HDR_GTPU_EH),
        VIRTCHNL_PROTO_HDR_GTPU_EH_QFI,
        /* PPPOE */
        VIRTCHNL_PROTO_HDR_PPPOE_SESS_ID =
                PROTO_HDR_FIELD_START(VIRTCHNL_PROTO_HDR_PPPOE),
        /* L2TPV3 */
        VIRTCHNL_PROTO_HDR_L2TPV3_SESS_ID =
                PROTO_HDR_FIELD_START(VIRTCHNL_PROTO_HDR_L2TPV3),
        /* ESP */
        VIRTCHNL_PROTO_HDR_ESP_SPI =
                PROTO_HDR_FIELD_START(VIRTCHNL_PROTO_HDR_ESP),
        /* AH */
        VIRTCHNL_PROTO_HDR_AH_SPI =
                PROTO_HDR_FIELD_START(VIRTCHNL_PROTO_HDR_AH),
        /* PFCP */
        VIRTCHNL_PROTO_HDR_PFCP_S_FIELD =
                PROTO_HDR_FIELD_START(VIRTCHNL_PROTO_HDR_PFCP),
        VIRTCHNL_PROTO_HDR_PFCP_SEID,
        /* GTPC */
        VIRTCHNL_PROTO_HDR_GTPC_TEID =
                PROTO_HDR_FIELD_START(VIRTCHNL_PROTO_HDR_GTPC),
        /* ECPRI */
        VIRTCHNL_PROTO_HDR_ECPRI_MSG_TYPE =
                PROTO_HDR_FIELD_START(VIRTCHNL_PROTO_HDR_ECPRI),
        VIRTCHNL_PROTO_HDR_ECPRI_PC_RTC_ID,
};

struct virtchnl_proto_hdr {
        enum virtchnl_proto_hdr_type type;
        u32 field_selector; /* a bit mask to select field for header type */
        u8 buffer[64];
        /**
         * binary buffer in network order for specific header type.
         * For example, if type = VIRTCHNL_PROTO_HDR_IPV4, a IPv4
         * header is expected to be copied into the buffer.
         */
};

VIRTCHNL_CHECK_STRUCT_LEN(72, virtchnl_proto_hdr);

struct virtchnl_proto_hdrs {
        u8 tunnel_level;
        /**
         * specify where protocol header start from.
         * 0 - from the outer layer
         * 1 - from the first inner layer
         * 2 - from the second inner layer
         * ....
         **/
        int count; /* the proto layers must < VIRTCHNL_MAX_NUM_PROTO_HDRS */
        struct virtchnl_proto_hdr proto_hdr[VIRTCHNL_MAX_NUM_PROTO_HDRS];
};

VIRTCHNL_CHECK_STRUCT_LEN(2312, virtchnl_proto_hdrs);

struct virtchnl_rss_cfg {
        struct virtchnl_proto_hdrs proto_hdrs;     /* protocol headers */
        enum virtchnl_rss_algorithm rss_algorithm; /* rss algorithm type */
        u8 reserved[128];                          /* reserve for future */
};

VIRTCHNL_CHECK_STRUCT_LEN(2444, virtchnl_rss_cfg);

/* action configuration for FDIR */
struct virtchnl_filter_action {
        enum virtchnl_action type;
        union {
                /* used for queue and qgroup action */
                struct {
                        u16 index;
                        u8 region;
                } queue;
                /* used for count action */
                struct {
                        /* share counter ID with other flow rules */
                        u8 shared;
                        u32 id; /* counter ID */
                } count;
                /* used for mark action */
                u32 mark_id;
                u8 reserve[32];
        } act_conf;
};

VIRTCHNL_CHECK_STRUCT_LEN(36, virtchnl_filter_action);

#define VIRTCHNL_MAX_NUM_ACTIONS  8

struct virtchnl_filter_action_set {
        /* action number must be less then VIRTCHNL_MAX_NUM_ACTIONS */
        int count;
        struct virtchnl_filter_action actions[VIRTCHNL_MAX_NUM_ACTIONS];
};

VIRTCHNL_CHECK_STRUCT_LEN(292, virtchnl_filter_action_set);

/* pattern and action for FDIR rule */
struct virtchnl_fdir_rule {
        struct virtchnl_proto_hdrs proto_hdrs;
        struct virtchnl_filter_action_set action_set;
};

VIRTCHNL_CHECK_STRUCT_LEN(2604, virtchnl_fdir_rule);

/* query information to retrieve fdir rule counters.
 * PF will fill out this structure to reset counter.
 */
struct virtchnl_fdir_query_info {
        u32 match_packets_valid:1;
        u32 match_bytes_valid:1;
        u32 reserved:30;  /* Reserved, must be zero. */
        u32 pad;
        u64 matched_packets; /* Number of packets for this rule. */
        u64 matched_bytes;   /* Number of bytes through this rule. */
};

VIRTCHNL_CHECK_STRUCT_LEN(24, virtchnl_fdir_query_info);

/* Status returned to VF after VF requests FDIR commands
 * VIRTCHNL_FDIR_SUCCESS
 * VF FDIR related request is successfully done by PF
 * The request can be OP_ADD/DEL/QUERY_FDIR_FILTER.
 *
 * VIRTCHNL_FDIR_FAILURE_RULE_NORESOURCE
 * OP_ADD_FDIR_FILTER request is failed due to no Hardware resource.
 *
 * VIRTCHNL_FDIR_FAILURE_RULE_EXIST
 * OP_ADD_FDIR_FILTER request is failed due to the rule is already existed.
 *
 * VIRTCHNL_FDIR_FAILURE_RULE_CONFLICT
 * OP_ADD_FDIR_FILTER request is failed due to conflict with existing rule.
 *
 * VIRTCHNL_FDIR_FAILURE_RULE_NONEXIST
 * OP_DEL_FDIR_FILTER request is failed due to this rule doesn't exist.
 *
 * VIRTCHNL_FDIR_FAILURE_RULE_INVALID
 * OP_ADD_FDIR_FILTER request is failed due to parameters validation
 * or HW doesn't support.
 *
 * VIRTCHNL_FDIR_FAILURE_RULE_TIMEOUT
 * OP_ADD/DEL_FDIR_FILTER request is failed due to timing out
 * for programming.
 *
 * VIRTCHNL_FDIR_FAILURE_QUERY_INVALID
 * OP_QUERY_FDIR_FILTER request is failed due to parameters validation,
 * for example, VF query counter of a rule who has no counter action.
 */
enum virtchnl_fdir_prgm_status {
        VIRTCHNL_FDIR_SUCCESS = 0,
        VIRTCHNL_FDIR_FAILURE_RULE_NORESOURCE,
        VIRTCHNL_FDIR_FAILURE_RULE_EXIST,
        VIRTCHNL_FDIR_FAILURE_RULE_CONFLICT,
        VIRTCHNL_FDIR_FAILURE_RULE_NONEXIST,
        VIRTCHNL_FDIR_FAILURE_RULE_INVALID,
        VIRTCHNL_FDIR_FAILURE_RULE_TIMEOUT,
        VIRTCHNL_FDIR_FAILURE_QUERY_INVALID,
};

/* VIRTCHNL_OP_ADD_FDIR_FILTER
 * VF sends this request to PF by filling out vsi_id,
 * validate_only and rule_cfg. PF will return flow_id
 * if the request is successfully done and return add_status to VF.
 */
struct virtchnl_fdir_add {
        u16 vsi_id;  /* INPUT */
        /*
         * 1 for validating a fdir rule, 0 for creating a fdir rule.
         * Validate and create share one ops: VIRTCHNL_OP_ADD_FDIR_FILTER.
         */
        u16 validate_only; /* INPUT */
        u32 flow_id;       /* OUTPUT */
        struct virtchnl_fdir_rule rule_cfg; /* INPUT */
        enum virtchnl_fdir_prgm_status status; /* OUTPUT */
};

VIRTCHNL_CHECK_STRUCT_LEN(2616, virtchnl_fdir_add);

/* VIRTCHNL_OP_DEL_FDIR_FILTER
 * VF sends this request to PF by filling out vsi_id
 * and flow_id. PF will return del_status to VF.
 */
struct virtchnl_fdir_del {
        u16 vsi_id;  /* INPUT */
        u16 pad;
        u32 flow_id; /* INPUT */
        enum virtchnl_fdir_prgm_status status; /* OUTPUT */
};

VIRTCHNL_CHECK_STRUCT_LEN(12, virtchnl_fdir_del);

/* VIRTCHNL_OP_QUERY_FDIR_FILTER
 * VF sends this request to PF by filling out vsi_id,
 * flow_id and reset_counter. PF will return query_info
 * and query_status to VF.
 */
struct virtchnl_fdir_query {
        u16 vsi_id;   /* INPUT */
        u16 pad1[3];
        u32 flow_id;  /* INPUT */
        u32 reset_counter:1; /* INPUT */
        struct virtchnl_fdir_query_info query_info; /* OUTPUT */
        enum virtchnl_fdir_prgm_status status;  /* OUTPUT */
        u32 pad2;
};

VIRTCHNL_CHECK_STRUCT_LEN(48, virtchnl_fdir_query);

/* TX and RX queue types are valid in legacy as well as split queue models.
 * With Split Queue model, 2 additional types are introduced - TX_COMPLETION
 * and RX_BUFFER. In split queue model, RX corresponds to the queue where HW
 * posts completions.
 */
enum virtchnl_queue_type {
        VIRTCHNL_QUEUE_TYPE_TX                  = 0,
        VIRTCHNL_QUEUE_TYPE_RX                  = 1,
        VIRTCHNL_QUEUE_TYPE_TX_COMPLETION       = 2,
        VIRTCHNL_QUEUE_TYPE_RX_BUFFER           = 3,
        VIRTCHNL_QUEUE_TYPE_CONFIG_TX           = 4,
        VIRTCHNL_QUEUE_TYPE_CONFIG_RX           = 5
};


/* structure to specify a chunk of contiguous queues */
struct virtchnl_queue_chunk {
        enum virtchnl_queue_type type;
        u16 start_queue_id;
        u16 num_queues;
};

VIRTCHNL_CHECK_STRUCT_LEN(8, virtchnl_queue_chunk);

/* structure to specify several chunks of contiguous queues */
struct virtchnl_queue_chunks {
        u16 num_chunks;
        u16 rsvd;
        struct virtchnl_queue_chunk chunks[1];
};

VIRTCHNL_CHECK_STRUCT_LEN(12, virtchnl_queue_chunks);


/* VIRTCHNL_OP_ENABLE_QUEUES_V2
 * VIRTCHNL_OP_DISABLE_QUEUES_V2
 * VIRTCHNL_OP_DEL_QUEUES
 *
 * If VIRTCHNL_CAP_EXT_FEATURES was negotiated in VIRTCHNL_OP_GET_VF_RESOURCES
 * then all of these ops are available.
 *
 * If VIRTCHNL_VF_LARGE_NUM_QPAIRS was negotiated in VIRTCHNL_OP_GET_VF_RESOURCES
 * then VIRTCHNL_OP_ENABLE_QUEUES_V2 and VIRTCHNL_OP_DISABLE_QUEUES_V2 are
 * available.
 *
 * PF sends these messages to enable, disable or delete queues specified in
 * chunks. PF sends virtchnl_del_ena_dis_queues struct to specify the queues
 * to be enabled/disabled/deleted. Also applicable to single queue RX or
 * TX. CP performs requested action and returns status.
 */
struct virtchnl_del_ena_dis_queues {
        u16 vport_id;
        u16 pad;
        struct virtchnl_queue_chunks chunks;
};

VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_del_ena_dis_queues);

/* Virtchannel interrupt throttling rate index */
enum virtchnl_itr_idx {
        VIRTCHNL_ITR_IDX_0      = 0,
        VIRTCHNL_ITR_IDX_1      = 1,
        VIRTCHNL_ITR_IDX_NO_ITR = 3,
};

/* Queue to vector mapping */
struct virtchnl_queue_vector {
        u16 queue_id;
        u16 vector_id;
        u8 pad[4];
        enum virtchnl_itr_idx itr_idx;
        enum virtchnl_queue_type queue_type;
};

VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_queue_vector);

/* VIRTCHNL_OP_MAP_QUEUE_VECTOR
 * VIRTCHNL_OP_UNMAP_QUEUE_VECTOR
 *
 * If VIRTCHNL_CAP_EXT_FEATURES was negotiated in VIRTCHNL_OP_GET_VF_RESOURCES
 * then all of these ops are available.
 *
 * If VIRTCHNL_VF_LARGE_NUM_QPAIRS was negotiated in VIRTCHNL_OP_GET_VF_RESOURCES
 * then only VIRTCHNL_OP_MAP_QUEUE_VECTOR is available.
 *
 * PF sends this message to map or unmap queues to vectors and ITR index
 * registers. External data buffer contains virtchnl_queue_vector_maps structure
 * that contains num_qv_maps of virtchnl_queue_vector structures.
 * CP maps the requested queue vector maps after validating the queue and vector
 * ids and returns a status code.
 */
struct virtchnl_queue_vector_maps {
        u16 vport_id;
        u16 num_qv_maps;
        u8 pad[4];
        struct virtchnl_queue_vector qv_maps[1];
};

VIRTCHNL_CHECK_STRUCT_LEN(24, virtchnl_queue_vector_maps);


/* Since VF messages are limited by u16 size, precalculate the maximum possible
 * values of nested elements in virtchnl structures that virtual channel can
 * possibly handle in a single message.
 */
enum virtchnl_vector_limits {
        VIRTCHNL_OP_CONFIG_VSI_QUEUES_MAX       =
                ((u16)(~0) - sizeof(struct virtchnl_vsi_queue_config_info)) /
                sizeof(struct virtchnl_queue_pair_info),

        VIRTCHNL_OP_CONFIG_IRQ_MAP_MAX          =
                ((u16)(~0) - sizeof(struct virtchnl_irq_map_info)) /
                sizeof(struct virtchnl_vector_map),

        VIRTCHNL_OP_ADD_DEL_ETH_ADDR_MAX        =
                ((u16)(~0) - sizeof(struct virtchnl_ether_addr_list)) /
                sizeof(struct virtchnl_ether_addr),

        VIRTCHNL_OP_ADD_DEL_VLAN_MAX            =
                ((u16)(~0) - sizeof(struct virtchnl_vlan_filter_list)) /
                sizeof(u16),


        VIRTCHNL_OP_ENABLE_CHANNELS_MAX         =
                ((u16)(~0) - sizeof(struct virtchnl_tc_info)) /
                sizeof(struct virtchnl_channel_info),

        VIRTCHNL_OP_ENABLE_DISABLE_DEL_QUEUES_V2_MAX    =
                ((u16)(~0) - sizeof(struct virtchnl_del_ena_dis_queues)) /
                sizeof(struct virtchnl_queue_chunk),

        VIRTCHNL_OP_MAP_UNMAP_QUEUE_VECTOR_MAX  =
                ((u16)(~0) - sizeof(struct virtchnl_queue_vector_maps)) /
                sizeof(struct virtchnl_queue_vector),

        VIRTCHNL_OP_ADD_DEL_VLAN_V2_MAX         =
                ((u16)(~0) - sizeof(struct virtchnl_vlan_filter_list_v2)) /
                sizeof(struct virtchnl_vlan_filter),
};

/**
 * virtchnl_vc_validate_vf_msg
 * @ver: Virtchnl version info
 * @v_opcode: Opcode for the message
 * @msg: pointer to the msg buffer
 * @msglen: msg length
 *
 * validate msg format against struct for each opcode
 */
static inline int
virtchnl_vc_validate_vf_msg(struct virtchnl_version_info *ver, u32 v_opcode,
                            u8 *msg, u16 msglen)
{
        bool err_msg_format = false;
        u32 valid_len = 0;

        /* Validate message length. */
        switch (v_opcode) {
        case VIRTCHNL_OP_VERSION:
                valid_len = sizeof(struct virtchnl_version_info);
                break;
        case VIRTCHNL_OP_RESET_VF:
                break;
        case VIRTCHNL_OP_GET_VF_RESOURCES:
                if (VF_IS_V11(ver))
                        valid_len = sizeof(u32);
                break;
        case VIRTCHNL_OP_CONFIG_TX_QUEUE:
                valid_len = sizeof(struct virtchnl_txq_info);
                break;
        case VIRTCHNL_OP_CONFIG_RX_QUEUE:
                valid_len = sizeof(struct virtchnl_rxq_info);
                break;
        case VIRTCHNL_OP_CONFIG_VSI_QUEUES:
                valid_len = sizeof(struct virtchnl_vsi_queue_config_info);
                if (msglen >= valid_len) {
                        struct virtchnl_vsi_queue_config_info *vqc =
                            (struct virtchnl_vsi_queue_config_info *)msg;

                        if (vqc->num_queue_pairs == 0 || vqc->num_queue_pairs >
                            VIRTCHNL_OP_CONFIG_VSI_QUEUES_MAX) {
                                err_msg_format = true;
                                break;
                        }

                        valid_len += (vqc->num_queue_pairs *
                                      sizeof(struct
                                             virtchnl_queue_pair_info));
                }
                break;
        case VIRTCHNL_OP_CONFIG_IRQ_MAP:
                valid_len = sizeof(struct virtchnl_irq_map_info);
                if (msglen >= valid_len) {
                        struct virtchnl_irq_map_info *vimi =
                            (struct virtchnl_irq_map_info *)msg;

                        if (vimi->num_vectors == 0 || vimi->num_vectors >
                            VIRTCHNL_OP_CONFIG_IRQ_MAP_MAX) {
                                err_msg_format = true;
                                break;
                        }

                        valid_len += (vimi->num_vectors *
                                      sizeof(struct virtchnl_vector_map));
                }
                break;
        case VIRTCHNL_OP_ENABLE_QUEUES:
        case VIRTCHNL_OP_DISABLE_QUEUES:
                valid_len = sizeof(struct virtchnl_queue_select);
                break;
        case VIRTCHNL_OP_GET_MAX_RSS_QREGION:
                break;
        case VIRTCHNL_OP_ADD_ETH_ADDR:
        case VIRTCHNL_OP_DEL_ETH_ADDR:
                valid_len = sizeof(struct virtchnl_ether_addr_list);
                if (msglen >= valid_len) {
                        struct virtchnl_ether_addr_list *veal =
                            (struct virtchnl_ether_addr_list *)msg;

                        if (veal->num_elements == 0 || veal->num_elements >
                            VIRTCHNL_OP_ADD_DEL_ETH_ADDR_MAX) {
                                err_msg_format = true;
                                break;
                        }

                        valid_len += veal->num_elements *
                            sizeof(struct virtchnl_ether_addr);
                }
                break;
        case VIRTCHNL_OP_ADD_VLAN:
        case VIRTCHNL_OP_DEL_VLAN:
                valid_len = sizeof(struct virtchnl_vlan_filter_list);
                if (msglen >= valid_len) {
                        struct virtchnl_vlan_filter_list *vfl =
                            (struct virtchnl_vlan_filter_list *)msg;

                        if (vfl->num_elements == 0 || vfl->num_elements >
                            VIRTCHNL_OP_ADD_DEL_VLAN_MAX) {
                                err_msg_format = true;
                                break;
                        }

                        valid_len += vfl->num_elements * sizeof(u16);
                }
                break;
        case VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE:
                valid_len = sizeof(struct virtchnl_promisc_info);
                break;
        case VIRTCHNL_OP_GET_STATS:
                valid_len = sizeof(struct virtchnl_queue_select);
                break;
        case VIRTCHNL_OP_CONFIG_RSS_KEY:
                valid_len = sizeof(struct virtchnl_rss_key);
                if (msglen >= valid_len) {
                        struct virtchnl_rss_key *vrk =
                                (struct virtchnl_rss_key *)msg;

                        if (vrk->key_len == 0) {
                                /* zero length is allowed as input */
                                break;
                        }

                        valid_len += vrk->key_len - 1;
                }
                break;
        case VIRTCHNL_OP_CONFIG_RSS_LUT:
                valid_len = sizeof(struct virtchnl_rss_lut);
                if (msglen >= valid_len) {
                        struct virtchnl_rss_lut *vrl =
                                (struct virtchnl_rss_lut *)msg;

                        if (vrl->lut_entries == 0) {
                                /* zero entries is allowed as input */
                                break;
                        }

                        valid_len += vrl->lut_entries - 1;
                }
                break;
        case VIRTCHNL_OP_GET_RSS_HENA_CAPS:
                break;
        case VIRTCHNL_OP_SET_RSS_HENA:
                valid_len = sizeof(struct virtchnl_rss_hena);
                break;
        case VIRTCHNL_OP_ENABLE_VLAN_STRIPPING:
        case VIRTCHNL_OP_DISABLE_VLAN_STRIPPING:
                break;
        case VIRTCHNL_OP_REQUEST_QUEUES:
                valid_len = sizeof(struct virtchnl_vf_res_request);
                break;
        case VIRTCHNL_OP_ENABLE_CHANNELS:
                valid_len = sizeof(struct virtchnl_tc_info);
                if (msglen >= valid_len) {
                        struct virtchnl_tc_info *vti =
                                (struct virtchnl_tc_info *)msg;

                        if (vti->num_tc == 0 || vti->num_tc >
                            VIRTCHNL_OP_ENABLE_CHANNELS_MAX) {
                                err_msg_format = true;
                                break;
                        }

                        valid_len += (vti->num_tc - 1) *
                                     sizeof(struct virtchnl_channel_info);
                }
                break;
        case VIRTCHNL_OP_DISABLE_CHANNELS:
                break;
        case VIRTCHNL_OP_ADD_CLOUD_FILTER:
        case VIRTCHNL_OP_DEL_CLOUD_FILTER:
                valid_len = sizeof(struct virtchnl_filter);
                break;
        case VIRTCHNL_OP_DCF_VLAN_OFFLOAD:
                valid_len = sizeof(struct virtchnl_dcf_vlan_offload);
                break;
        case VIRTCHNL_OP_DCF_CMD_DESC:
        case VIRTCHNL_OP_DCF_CMD_BUFF:
                /* These two opcodes are specific to handle the AdminQ command,
                 * so the validation needs to be done in PF's context.
                 */
                valid_len = msglen;
                break;
        case VIRTCHNL_OP_DCF_DISABLE:
        case VIRTCHNL_OP_DCF_GET_VSI_MAP:
        case VIRTCHNL_OP_DCF_GET_PKG_INFO:
                break;
        case VIRTCHNL_OP_GET_SUPPORTED_RXDIDS:
                break;
        case VIRTCHNL_OP_ADD_RSS_CFG:
        case VIRTCHNL_OP_DEL_RSS_CFG:
                valid_len = sizeof(struct virtchnl_rss_cfg);
                break;
        case VIRTCHNL_OP_ADD_FDIR_FILTER:
                valid_len = sizeof(struct virtchnl_fdir_add);
                break;
        case VIRTCHNL_OP_DEL_FDIR_FILTER:
                valid_len = sizeof(struct virtchnl_fdir_del);
                break;
        case VIRTCHNL_OP_QUERY_FDIR_FILTER:
                valid_len = sizeof(struct virtchnl_fdir_query);
                break;
        case VIRTCHNL_OP_GET_OFFLOAD_VLAN_V2_CAPS:
                break;
        case VIRTCHNL_OP_ADD_VLAN_V2:
        case VIRTCHNL_OP_DEL_VLAN_V2:
                valid_len = sizeof(struct virtchnl_vlan_filter_list_v2);
                if (msglen >= valid_len) {
                        struct virtchnl_vlan_filter_list_v2 *vfl =
                            (struct virtchnl_vlan_filter_list_v2 *)msg;

                        if (vfl->num_elements == 0 || vfl->num_elements >
                            VIRTCHNL_OP_ADD_DEL_VLAN_V2_MAX) {
                                err_msg_format = true;
                                break;
                        }

                        valid_len += (vfl->num_elements - 1) *
                                sizeof(struct virtchnl_vlan_filter);
                }
                break;
        case VIRTCHNL_OP_ENABLE_VLAN_STRIPPING_V2:
        case VIRTCHNL_OP_DISABLE_VLAN_STRIPPING_V2:
        case VIRTCHNL_OP_ENABLE_VLAN_INSERTION_V2:
        case VIRTCHNL_OP_DISABLE_VLAN_INSERTION_V2:
        case VIRTCHNL_OP_ENABLE_VLAN_FILTERING_V2:
        case VIRTCHNL_OP_DISABLE_VLAN_FILTERING_V2:
                valid_len = sizeof(struct virtchnl_vlan_setting);
                break;
        case VIRTCHNL_OP_ENABLE_QUEUES_V2:
        case VIRTCHNL_OP_DISABLE_QUEUES_V2:
                valid_len = sizeof(struct virtchnl_del_ena_dis_queues);
                if (msglen >= valid_len) {
                        struct virtchnl_del_ena_dis_queues *qs =
                                (struct virtchnl_del_ena_dis_queues *)msg;
                        if (qs->chunks.num_chunks == 0 ||
                            qs->chunks.num_chunks > VIRTCHNL_OP_ENABLE_DISABLE_DEL_QUEUES_V2_MAX) {
                                err_msg_format = true;
                                break;
                        }
                        valid_len += (qs->chunks.num_chunks - 1) *
                                      sizeof(struct virtchnl_queue_chunk);
                }
                break;
        case VIRTCHNL_OP_MAP_QUEUE_VECTOR:
                valid_len = sizeof(struct virtchnl_queue_vector_maps);
                if (msglen >= valid_len) {
                        struct virtchnl_queue_vector_maps *v_qp =
                                (struct virtchnl_queue_vector_maps *)msg;
                        if (v_qp->num_qv_maps == 0 ||
                            v_qp->num_qv_maps > VIRTCHNL_OP_MAP_UNMAP_QUEUE_VECTOR_MAX) {
                                err_msg_format = true;
                                break;
                        }
                        valid_len += (v_qp->num_qv_maps - 1) *
                                      sizeof(struct virtchnl_queue_vector);
                }
                break;
        /* These are always errors coming from the VF. */
        case VIRTCHNL_OP_EVENT:
        case VIRTCHNL_OP_UNKNOWN:
        default:
                return VIRTCHNL_STATUS_ERR_PARAM;
        }
        /* few more checks */
        if (err_msg_format || valid_len != msglen)
                return VIRTCHNL_STATUS_ERR_OPCODE_MISMATCH;

        return 0;
}
#endif /* _VIRTCHNL_H_ */